Commit | Line | Data |
---|---|---|
e0001a05 | 1 | /* Xtensa-specific support for 32-bit ELF. |
219d1afa | 2 | Copyright (C) 2003-2018 Free Software Foundation, Inc. |
e0001a05 NC |
3 | |
4 | This file is part of BFD, the Binary File Descriptor library. | |
5 | ||
6 | This program is free software; you can redistribute it and/or | |
7 | modify it under the terms of the GNU General Public License as | |
cd123cb7 | 8 | published by the Free Software Foundation; either version 3 of the |
e0001a05 NC |
9 | License, or (at your option) any later version. |
10 | ||
11 | This program is distributed in the hope that it will be useful, but | |
12 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with this program; if not, write to the Free Software | |
3e110533 | 18 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA |
53e09e0a | 19 | 02110-1301, USA. */ |
e0001a05 | 20 | |
e0001a05 | 21 | #include "sysdep.h" |
3db64b00 | 22 | #include "bfd.h" |
e0001a05 | 23 | |
e0001a05 | 24 | #include <stdarg.h> |
e0001a05 NC |
25 | #include <strings.h> |
26 | ||
27 | #include "bfdlink.h" | |
28 | #include "libbfd.h" | |
29 | #include "elf-bfd.h" | |
30 | #include "elf/xtensa.h" | |
4c2af04f | 31 | #include "splay-tree.h" |
e0001a05 NC |
32 | #include "xtensa-isa.h" |
33 | #include "xtensa-config.h" | |
34 | ||
43cd72b9 BW |
35 | #define XTENSA_NO_NOP_REMOVAL 0 |
36 | ||
e0001a05 NC |
37 | /* Local helper functions. */ |
38 | ||
f0e6fdb2 | 39 | static bfd_boolean add_extra_plt_sections (struct bfd_link_info *, int); |
2db662be | 40 | static char *vsprint_msg (const char *, const char *, int, ...) ATTRIBUTE_PRINTF(2,4); |
e0001a05 | 41 | static bfd_reloc_status_type bfd_elf_xtensa_reloc |
7fa3d080 | 42 | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
43cd72b9 | 43 | static bfd_boolean do_fix_for_relocatable_link |
7fa3d080 | 44 | (Elf_Internal_Rela *, bfd *, asection *, bfd_byte *); |
e0001a05 | 45 | static void do_fix_for_final_link |
7fa3d080 | 46 | (Elf_Internal_Rela *, bfd *, asection *, bfd_byte *, bfd_vma *); |
e0001a05 NC |
47 | |
48 | /* Local functions to handle Xtensa configurability. */ | |
49 | ||
7fa3d080 BW |
50 | static bfd_boolean is_indirect_call_opcode (xtensa_opcode); |
51 | static bfd_boolean is_direct_call_opcode (xtensa_opcode); | |
52 | static bfd_boolean is_windowed_call_opcode (xtensa_opcode); | |
53 | static xtensa_opcode get_const16_opcode (void); | |
54 | static xtensa_opcode get_l32r_opcode (void); | |
55 | static bfd_vma l32r_offset (bfd_vma, bfd_vma); | |
56 | static int get_relocation_opnd (xtensa_opcode, int); | |
57 | static int get_relocation_slot (int); | |
e0001a05 | 58 | static xtensa_opcode get_relocation_opcode |
7fa3d080 | 59 | (bfd *, asection *, bfd_byte *, Elf_Internal_Rela *); |
e0001a05 | 60 | static bfd_boolean is_l32r_relocation |
7fa3d080 BW |
61 | (bfd *, asection *, bfd_byte *, Elf_Internal_Rela *); |
62 | static bfd_boolean is_alt_relocation (int); | |
63 | static bfd_boolean is_operand_relocation (int); | |
43cd72b9 | 64 | static bfd_size_type insn_decode_len |
7fa3d080 | 65 | (bfd_byte *, bfd_size_type, bfd_size_type); |
43cd72b9 | 66 | static xtensa_opcode insn_decode_opcode |
7fa3d080 | 67 | (bfd_byte *, bfd_size_type, bfd_size_type, int); |
43cd72b9 | 68 | static bfd_boolean check_branch_target_aligned |
7fa3d080 | 69 | (bfd_byte *, bfd_size_type, bfd_vma, bfd_vma); |
43cd72b9 | 70 | static bfd_boolean check_loop_aligned |
7fa3d080 BW |
71 | (bfd_byte *, bfd_size_type, bfd_vma, bfd_vma); |
72 | static bfd_boolean check_branch_target_aligned_address (bfd_vma, int); | |
43cd72b9 | 73 | static bfd_size_type get_asm_simplify_size |
7fa3d080 | 74 | (bfd_byte *, bfd_size_type, bfd_size_type); |
e0001a05 NC |
75 | |
76 | /* Functions for link-time code simplifications. */ | |
77 | ||
43cd72b9 | 78 | static bfd_reloc_status_type elf_xtensa_do_asm_simplify |
7fa3d080 | 79 | (bfd_byte *, bfd_vma, bfd_vma, char **); |
e0001a05 | 80 | static bfd_reloc_status_type contract_asm_expansion |
7fa3d080 BW |
81 | (bfd_byte *, bfd_vma, Elf_Internal_Rela *, char **); |
82 | static xtensa_opcode swap_callx_for_call_opcode (xtensa_opcode); | |
83 | static xtensa_opcode get_expanded_call_opcode (bfd_byte *, int, bfd_boolean *); | |
e0001a05 NC |
84 | |
85 | /* Access to internal relocations, section contents and symbols. */ | |
86 | ||
87 | static Elf_Internal_Rela *retrieve_internal_relocs | |
7fa3d080 BW |
88 | (bfd *, asection *, bfd_boolean); |
89 | static void pin_internal_relocs (asection *, Elf_Internal_Rela *); | |
90 | static void release_internal_relocs (asection *, Elf_Internal_Rela *); | |
91 | static bfd_byte *retrieve_contents (bfd *, asection *, bfd_boolean); | |
92 | static void pin_contents (asection *, bfd_byte *); | |
93 | static void release_contents (asection *, bfd_byte *); | |
94 | static Elf_Internal_Sym *retrieve_local_syms (bfd *); | |
e0001a05 NC |
95 | |
96 | /* Miscellaneous utility functions. */ | |
97 | ||
f0e6fdb2 BW |
98 | static asection *elf_xtensa_get_plt_section (struct bfd_link_info *, int); |
99 | static asection *elf_xtensa_get_gotplt_section (struct bfd_link_info *, int); | |
7fa3d080 | 100 | static asection *get_elf_r_symndx_section (bfd *, unsigned long); |
e0001a05 | 101 | static struct elf_link_hash_entry *get_elf_r_symndx_hash_entry |
7fa3d080 BW |
102 | (bfd *, unsigned long); |
103 | static bfd_vma get_elf_r_symndx_offset (bfd *, unsigned long); | |
104 | static bfd_boolean is_reloc_sym_weak (bfd *, Elf_Internal_Rela *); | |
105 | static bfd_boolean pcrel_reloc_fits (xtensa_opcode, int, bfd_vma, bfd_vma); | |
106 | static bfd_boolean xtensa_is_property_section (asection *); | |
1d25768e | 107 | static bfd_boolean xtensa_is_insntable_section (asection *); |
7fa3d080 | 108 | static bfd_boolean xtensa_is_littable_section (asection *); |
1d25768e | 109 | static bfd_boolean xtensa_is_proptable_section (asection *); |
7fa3d080 BW |
110 | static int internal_reloc_compare (const void *, const void *); |
111 | static int internal_reloc_matches (const void *, const void *); | |
51c8ebc1 | 112 | static asection *xtensa_get_property_section (asection *, const char *); |
7fa3d080 | 113 | static flagword xtensa_get_property_predef_flags (asection *); |
e0001a05 NC |
114 | |
115 | /* Other functions called directly by the linker. */ | |
116 | ||
117 | typedef void (*deps_callback_t) | |
7fa3d080 | 118 | (asection *, bfd_vma, asection *, bfd_vma, void *); |
e0001a05 | 119 | extern bfd_boolean xtensa_callback_required_dependence |
7fa3d080 | 120 | (bfd *, asection *, struct bfd_link_info *, deps_callback_t, void *); |
e0001a05 NC |
121 | |
122 | ||
43cd72b9 BW |
123 | /* Globally visible flag for choosing size optimization of NOP removal |
124 | instead of branch-target-aware minimization for NOP removal. | |
125 | When nonzero, narrow all instructions and remove all NOPs possible | |
126 | around longcall expansions. */ | |
7fa3d080 | 127 | |
43cd72b9 BW |
128 | int elf32xtensa_size_opt; |
129 | ||
130 | ||
131 | /* The "new_section_hook" is used to set up a per-section | |
132 | "xtensa_relax_info" data structure with additional information used | |
133 | during relaxation. */ | |
e0001a05 | 134 | |
7fa3d080 | 135 | typedef struct xtensa_relax_info_struct xtensa_relax_info; |
e0001a05 | 136 | |
43cd72b9 | 137 | |
43cd72b9 BW |
138 | /* The GNU tools do not easily allow extending interfaces to pass around |
139 | the pointer to the Xtensa ISA information, so instead we add a global | |
140 | variable here (in BFD) that can be used by any of the tools that need | |
141 | this information. */ | |
142 | ||
143 | xtensa_isa xtensa_default_isa; | |
144 | ||
145 | ||
e0001a05 NC |
146 | /* When this is true, relocations may have been modified to refer to |
147 | symbols from other input files. The per-section list of "fix" | |
148 | records needs to be checked when resolving relocations. */ | |
149 | ||
150 | static bfd_boolean relaxing_section = FALSE; | |
151 | ||
43cd72b9 BW |
152 | /* When this is true, during final links, literals that cannot be |
153 | coalesced and their relocations may be moved to other sections. */ | |
154 | ||
155 | int elf32xtensa_no_literal_movement = 1; | |
156 | ||
8255c61b MF |
157 | /* Place property records for a section into individual property section |
158 | with xt.prop. prefix. */ | |
159 | ||
160 | bfd_boolean elf32xtensa_separate_props = FALSE; | |
161 | ||
b0dddeec AM |
162 | /* Rename one of the generic section flags to better document how it |
163 | is used here. */ | |
164 | /* Whether relocations have been processed. */ | |
165 | #define reloc_done sec_flg0 | |
e0001a05 NC |
166 | \f |
167 | static reloc_howto_type elf_howto_table[] = | |
168 | { | |
6346d5ca | 169 | HOWTO (R_XTENSA_NONE, 0, 3, 0, FALSE, 0, complain_overflow_dont, |
e0001a05 | 170 | bfd_elf_xtensa_reloc, "R_XTENSA_NONE", |
e5f131d1 | 171 | FALSE, 0, 0, FALSE), |
e0001a05 NC |
172 | HOWTO (R_XTENSA_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
173 | bfd_elf_xtensa_reloc, "R_XTENSA_32", | |
174 | TRUE, 0xffffffff, 0xffffffff, FALSE), | |
e5f131d1 | 175 | |
e0001a05 NC |
176 | /* Replace a 32-bit value with a value from the runtime linker (only |
177 | used by linker-generated stub functions). The r_addend value is | |
178 | special: 1 means to substitute a pointer to the runtime linker's | |
179 | dynamic resolver function; 2 means to substitute the link map for | |
180 | the shared object. */ | |
181 | HOWTO (R_XTENSA_RTLD, 0, 2, 32, FALSE, 0, complain_overflow_dont, | |
e5f131d1 BW |
182 | NULL, "R_XTENSA_RTLD", FALSE, 0, 0, FALSE), |
183 | ||
e0001a05 NC |
184 | HOWTO (R_XTENSA_GLOB_DAT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
185 | bfd_elf_generic_reloc, "R_XTENSA_GLOB_DAT", | |
e5f131d1 | 186 | FALSE, 0, 0xffffffff, FALSE), |
e0001a05 NC |
187 | HOWTO (R_XTENSA_JMP_SLOT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
188 | bfd_elf_generic_reloc, "R_XTENSA_JMP_SLOT", | |
e5f131d1 | 189 | FALSE, 0, 0xffffffff, FALSE), |
e0001a05 NC |
190 | HOWTO (R_XTENSA_RELATIVE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
191 | bfd_elf_generic_reloc, "R_XTENSA_RELATIVE", | |
e5f131d1 | 192 | FALSE, 0, 0xffffffff, FALSE), |
e0001a05 NC |
193 | HOWTO (R_XTENSA_PLT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
194 | bfd_elf_xtensa_reloc, "R_XTENSA_PLT", | |
e5f131d1 BW |
195 | FALSE, 0, 0xffffffff, FALSE), |
196 | ||
e0001a05 | 197 | EMPTY_HOWTO (7), |
e5f131d1 BW |
198 | |
199 | /* Old relocations for backward compatibility. */ | |
e0001a05 | 200 | HOWTO (R_XTENSA_OP0, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 201 | bfd_elf_xtensa_reloc, "R_XTENSA_OP0", FALSE, 0, 0, TRUE), |
e0001a05 | 202 | HOWTO (R_XTENSA_OP1, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 203 | bfd_elf_xtensa_reloc, "R_XTENSA_OP1", FALSE, 0, 0, TRUE), |
e0001a05 | 204 | HOWTO (R_XTENSA_OP2, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 BW |
205 | bfd_elf_xtensa_reloc, "R_XTENSA_OP2", FALSE, 0, 0, TRUE), |
206 | ||
e0001a05 NC |
207 | /* Assembly auto-expansion. */ |
208 | HOWTO (R_XTENSA_ASM_EXPAND, 0, 0, 0, TRUE, 0, complain_overflow_dont, | |
e5f131d1 | 209 | bfd_elf_xtensa_reloc, "R_XTENSA_ASM_EXPAND", FALSE, 0, 0, TRUE), |
e0001a05 NC |
210 | /* Relax assembly auto-expansion. */ |
211 | HOWTO (R_XTENSA_ASM_SIMPLIFY, 0, 0, 0, TRUE, 0, complain_overflow_dont, | |
e5f131d1 BW |
212 | bfd_elf_xtensa_reloc, "R_XTENSA_ASM_SIMPLIFY", FALSE, 0, 0, TRUE), |
213 | ||
e0001a05 | 214 | EMPTY_HOWTO (13), |
1bbb5f21 BW |
215 | |
216 | HOWTO (R_XTENSA_32_PCREL, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
217 | bfd_elf_xtensa_reloc, "R_XTENSA_32_PCREL", | |
218 | FALSE, 0, 0xffffffff, TRUE), | |
e5f131d1 | 219 | |
e0001a05 NC |
220 | /* GNU extension to record C++ vtable hierarchy. */ |
221 | HOWTO (R_XTENSA_GNU_VTINHERIT, 0, 2, 0, FALSE, 0, complain_overflow_dont, | |
07d6d2b8 | 222 | NULL, "R_XTENSA_GNU_VTINHERIT", |
e5f131d1 | 223 | FALSE, 0, 0, FALSE), |
e0001a05 NC |
224 | /* GNU extension to record C++ vtable member usage. */ |
225 | HOWTO (R_XTENSA_GNU_VTENTRY, 0, 2, 0, FALSE, 0, complain_overflow_dont, | |
07d6d2b8 | 226 | _bfd_elf_rel_vtable_reloc_fn, "R_XTENSA_GNU_VTENTRY", |
e5f131d1 | 227 | FALSE, 0, 0, FALSE), |
43cd72b9 BW |
228 | |
229 | /* Relocations for supporting difference of symbols. */ | |
1058c753 | 230 | HOWTO (R_XTENSA_DIFF8, 0, 0, 8, FALSE, 0, complain_overflow_signed, |
e5f131d1 | 231 | bfd_elf_xtensa_reloc, "R_XTENSA_DIFF8", FALSE, 0, 0xff, FALSE), |
1058c753 | 232 | HOWTO (R_XTENSA_DIFF16, 0, 1, 16, FALSE, 0, complain_overflow_signed, |
e5f131d1 | 233 | bfd_elf_xtensa_reloc, "R_XTENSA_DIFF16", FALSE, 0, 0xffff, FALSE), |
1058c753 | 234 | HOWTO (R_XTENSA_DIFF32, 0, 2, 32, FALSE, 0, complain_overflow_signed, |
e5f131d1 | 235 | bfd_elf_xtensa_reloc, "R_XTENSA_DIFF32", FALSE, 0, 0xffffffff, FALSE), |
43cd72b9 BW |
236 | |
237 | /* General immediate operand relocations. */ | |
238 | HOWTO (R_XTENSA_SLOT0_OP, 0, 0, 0, TRUE, 0, complain_overflow_dont, | |
e5f131d1 | 239 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT0_OP", FALSE, 0, 0, TRUE), |
43cd72b9 | 240 | HOWTO (R_XTENSA_SLOT1_OP, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 241 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT1_OP", FALSE, 0, 0, TRUE), |
43cd72b9 | 242 | HOWTO (R_XTENSA_SLOT2_OP, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 243 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT2_OP", FALSE, 0, 0, TRUE), |
43cd72b9 | 244 | HOWTO (R_XTENSA_SLOT3_OP, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 245 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT3_OP", FALSE, 0, 0, TRUE), |
43cd72b9 | 246 | HOWTO (R_XTENSA_SLOT4_OP, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 247 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT4_OP", FALSE, 0, 0, TRUE), |
43cd72b9 | 248 | HOWTO (R_XTENSA_SLOT5_OP, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 249 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT5_OP", FALSE, 0, 0, TRUE), |
43cd72b9 | 250 | HOWTO (R_XTENSA_SLOT6_OP, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 251 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT6_OP", FALSE, 0, 0, TRUE), |
43cd72b9 | 252 | HOWTO (R_XTENSA_SLOT7_OP, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 253 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT7_OP", FALSE, 0, 0, TRUE), |
43cd72b9 | 254 | HOWTO (R_XTENSA_SLOT8_OP, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 255 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT8_OP", FALSE, 0, 0, TRUE), |
43cd72b9 | 256 | HOWTO (R_XTENSA_SLOT9_OP, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 257 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT9_OP", FALSE, 0, 0, TRUE), |
43cd72b9 | 258 | HOWTO (R_XTENSA_SLOT10_OP, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 259 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT10_OP", FALSE, 0, 0, TRUE), |
43cd72b9 | 260 | HOWTO (R_XTENSA_SLOT11_OP, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 261 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT11_OP", FALSE, 0, 0, TRUE), |
43cd72b9 | 262 | HOWTO (R_XTENSA_SLOT12_OP, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 263 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT12_OP", FALSE, 0, 0, TRUE), |
43cd72b9 | 264 | HOWTO (R_XTENSA_SLOT13_OP, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 265 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT13_OP", FALSE, 0, 0, TRUE), |
43cd72b9 | 266 | HOWTO (R_XTENSA_SLOT14_OP, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 267 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT14_OP", FALSE, 0, 0, TRUE), |
43cd72b9 BW |
268 | |
269 | /* "Alternate" relocations. The meaning of these is opcode-specific. */ | |
270 | HOWTO (R_XTENSA_SLOT0_ALT, 0, 0, 0, TRUE, 0, complain_overflow_dont, | |
e5f131d1 | 271 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT0_ALT", FALSE, 0, 0, TRUE), |
43cd72b9 | 272 | HOWTO (R_XTENSA_SLOT1_ALT, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 273 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT1_ALT", FALSE, 0, 0, TRUE), |
43cd72b9 | 274 | HOWTO (R_XTENSA_SLOT2_ALT, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 275 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT2_ALT", FALSE, 0, 0, TRUE), |
43cd72b9 | 276 | HOWTO (R_XTENSA_SLOT3_ALT, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 277 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT3_ALT", FALSE, 0, 0, TRUE), |
43cd72b9 | 278 | HOWTO (R_XTENSA_SLOT4_ALT, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 279 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT4_ALT", FALSE, 0, 0, TRUE), |
43cd72b9 | 280 | HOWTO (R_XTENSA_SLOT5_ALT, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 281 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT5_ALT", FALSE, 0, 0, TRUE), |
43cd72b9 | 282 | HOWTO (R_XTENSA_SLOT6_ALT, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 283 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT6_ALT", FALSE, 0, 0, TRUE), |
43cd72b9 | 284 | HOWTO (R_XTENSA_SLOT7_ALT, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 285 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT7_ALT", FALSE, 0, 0, TRUE), |
43cd72b9 | 286 | HOWTO (R_XTENSA_SLOT8_ALT, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 287 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT8_ALT", FALSE, 0, 0, TRUE), |
43cd72b9 | 288 | HOWTO (R_XTENSA_SLOT9_ALT, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 289 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT9_ALT", FALSE, 0, 0, TRUE), |
43cd72b9 | 290 | HOWTO (R_XTENSA_SLOT10_ALT, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 291 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT10_ALT", FALSE, 0, 0, TRUE), |
43cd72b9 | 292 | HOWTO (R_XTENSA_SLOT11_ALT, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 293 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT11_ALT", FALSE, 0, 0, TRUE), |
43cd72b9 | 294 | HOWTO (R_XTENSA_SLOT12_ALT, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 295 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT12_ALT", FALSE, 0, 0, TRUE), |
43cd72b9 | 296 | HOWTO (R_XTENSA_SLOT13_ALT, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 297 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT13_ALT", FALSE, 0, 0, TRUE), |
43cd72b9 | 298 | HOWTO (R_XTENSA_SLOT14_ALT, 0, 0, 0, TRUE, 0, complain_overflow_dont, |
e5f131d1 | 299 | bfd_elf_xtensa_reloc, "R_XTENSA_SLOT14_ALT", FALSE, 0, 0, TRUE), |
28dbbc02 BW |
300 | |
301 | /* TLS relocations. */ | |
302 | HOWTO (R_XTENSA_TLSDESC_FN, 0, 2, 32, FALSE, 0, complain_overflow_dont, | |
303 | bfd_elf_xtensa_reloc, "R_XTENSA_TLSDESC_FN", | |
304 | FALSE, 0, 0xffffffff, FALSE), | |
305 | HOWTO (R_XTENSA_TLSDESC_ARG, 0, 2, 32, FALSE, 0, complain_overflow_dont, | |
306 | bfd_elf_xtensa_reloc, "R_XTENSA_TLSDESC_ARG", | |
307 | FALSE, 0, 0xffffffff, FALSE), | |
308 | HOWTO (R_XTENSA_TLS_DTPOFF, 0, 2, 32, FALSE, 0, complain_overflow_dont, | |
309 | bfd_elf_xtensa_reloc, "R_XTENSA_TLS_DTPOFF", | |
310 | FALSE, 0, 0xffffffff, FALSE), | |
311 | HOWTO (R_XTENSA_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_dont, | |
312 | bfd_elf_xtensa_reloc, "R_XTENSA_TLS_TPOFF", | |
313 | FALSE, 0, 0xffffffff, FALSE), | |
314 | HOWTO (R_XTENSA_TLS_FUNC, 0, 0, 0, FALSE, 0, complain_overflow_dont, | |
315 | bfd_elf_xtensa_reloc, "R_XTENSA_TLS_FUNC", | |
316 | FALSE, 0, 0, FALSE), | |
317 | HOWTO (R_XTENSA_TLS_ARG, 0, 0, 0, FALSE, 0, complain_overflow_dont, | |
318 | bfd_elf_xtensa_reloc, "R_XTENSA_TLS_ARG", | |
319 | FALSE, 0, 0, FALSE), | |
320 | HOWTO (R_XTENSA_TLS_CALL, 0, 0, 0, FALSE, 0, complain_overflow_dont, | |
321 | bfd_elf_xtensa_reloc, "R_XTENSA_TLS_CALL", | |
322 | FALSE, 0, 0, FALSE), | |
e0001a05 NC |
323 | }; |
324 | ||
43cd72b9 | 325 | #if DEBUG_GEN_RELOC |
e0001a05 NC |
326 | #define TRACE(str) \ |
327 | fprintf (stderr, "Xtensa bfd reloc lookup %d (%s)\n", code, str) | |
328 | #else | |
329 | #define TRACE(str) | |
330 | #endif | |
331 | ||
332 | static reloc_howto_type * | |
7fa3d080 BW |
333 | elf_xtensa_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
334 | bfd_reloc_code_real_type code) | |
e0001a05 NC |
335 | { |
336 | switch (code) | |
337 | { | |
338 | case BFD_RELOC_NONE: | |
339 | TRACE ("BFD_RELOC_NONE"); | |
340 | return &elf_howto_table[(unsigned) R_XTENSA_NONE ]; | |
341 | ||
342 | case BFD_RELOC_32: | |
343 | TRACE ("BFD_RELOC_32"); | |
344 | return &elf_howto_table[(unsigned) R_XTENSA_32 ]; | |
345 | ||
1bbb5f21 BW |
346 | case BFD_RELOC_32_PCREL: |
347 | TRACE ("BFD_RELOC_32_PCREL"); | |
348 | return &elf_howto_table[(unsigned) R_XTENSA_32_PCREL ]; | |
349 | ||
43cd72b9 BW |
350 | case BFD_RELOC_XTENSA_DIFF8: |
351 | TRACE ("BFD_RELOC_XTENSA_DIFF8"); | |
352 | return &elf_howto_table[(unsigned) R_XTENSA_DIFF8 ]; | |
353 | ||
354 | case BFD_RELOC_XTENSA_DIFF16: | |
355 | TRACE ("BFD_RELOC_XTENSA_DIFF16"); | |
356 | return &elf_howto_table[(unsigned) R_XTENSA_DIFF16 ]; | |
357 | ||
358 | case BFD_RELOC_XTENSA_DIFF32: | |
359 | TRACE ("BFD_RELOC_XTENSA_DIFF32"); | |
360 | return &elf_howto_table[(unsigned) R_XTENSA_DIFF32 ]; | |
361 | ||
e0001a05 NC |
362 | case BFD_RELOC_XTENSA_RTLD: |
363 | TRACE ("BFD_RELOC_XTENSA_RTLD"); | |
364 | return &elf_howto_table[(unsigned) R_XTENSA_RTLD ]; | |
365 | ||
366 | case BFD_RELOC_XTENSA_GLOB_DAT: | |
367 | TRACE ("BFD_RELOC_XTENSA_GLOB_DAT"); | |
368 | return &elf_howto_table[(unsigned) R_XTENSA_GLOB_DAT ]; | |
369 | ||
370 | case BFD_RELOC_XTENSA_JMP_SLOT: | |
371 | TRACE ("BFD_RELOC_XTENSA_JMP_SLOT"); | |
372 | return &elf_howto_table[(unsigned) R_XTENSA_JMP_SLOT ]; | |
373 | ||
374 | case BFD_RELOC_XTENSA_RELATIVE: | |
375 | TRACE ("BFD_RELOC_XTENSA_RELATIVE"); | |
376 | return &elf_howto_table[(unsigned) R_XTENSA_RELATIVE ]; | |
377 | ||
378 | case BFD_RELOC_XTENSA_PLT: | |
379 | TRACE ("BFD_RELOC_XTENSA_PLT"); | |
380 | return &elf_howto_table[(unsigned) R_XTENSA_PLT ]; | |
381 | ||
382 | case BFD_RELOC_XTENSA_OP0: | |
383 | TRACE ("BFD_RELOC_XTENSA_OP0"); | |
384 | return &elf_howto_table[(unsigned) R_XTENSA_OP0 ]; | |
385 | ||
386 | case BFD_RELOC_XTENSA_OP1: | |
387 | TRACE ("BFD_RELOC_XTENSA_OP1"); | |
388 | return &elf_howto_table[(unsigned) R_XTENSA_OP1 ]; | |
389 | ||
390 | case BFD_RELOC_XTENSA_OP2: | |
391 | TRACE ("BFD_RELOC_XTENSA_OP2"); | |
392 | return &elf_howto_table[(unsigned) R_XTENSA_OP2 ]; | |
393 | ||
394 | case BFD_RELOC_XTENSA_ASM_EXPAND: | |
395 | TRACE ("BFD_RELOC_XTENSA_ASM_EXPAND"); | |
396 | return &elf_howto_table[(unsigned) R_XTENSA_ASM_EXPAND ]; | |
397 | ||
398 | case BFD_RELOC_XTENSA_ASM_SIMPLIFY: | |
399 | TRACE ("BFD_RELOC_XTENSA_ASM_SIMPLIFY"); | |
400 | return &elf_howto_table[(unsigned) R_XTENSA_ASM_SIMPLIFY ]; | |
401 | ||
402 | case BFD_RELOC_VTABLE_INHERIT: | |
403 | TRACE ("BFD_RELOC_VTABLE_INHERIT"); | |
404 | return &elf_howto_table[(unsigned) R_XTENSA_GNU_VTINHERIT ]; | |
405 | ||
406 | case BFD_RELOC_VTABLE_ENTRY: | |
407 | TRACE ("BFD_RELOC_VTABLE_ENTRY"); | |
408 | return &elf_howto_table[(unsigned) R_XTENSA_GNU_VTENTRY ]; | |
409 | ||
28dbbc02 BW |
410 | case BFD_RELOC_XTENSA_TLSDESC_FN: |
411 | TRACE ("BFD_RELOC_XTENSA_TLSDESC_FN"); | |
412 | return &elf_howto_table[(unsigned) R_XTENSA_TLSDESC_FN ]; | |
413 | ||
414 | case BFD_RELOC_XTENSA_TLSDESC_ARG: | |
415 | TRACE ("BFD_RELOC_XTENSA_TLSDESC_ARG"); | |
416 | return &elf_howto_table[(unsigned) R_XTENSA_TLSDESC_ARG ]; | |
417 | ||
418 | case BFD_RELOC_XTENSA_TLS_DTPOFF: | |
419 | TRACE ("BFD_RELOC_XTENSA_TLS_DTPOFF"); | |
420 | return &elf_howto_table[(unsigned) R_XTENSA_TLS_DTPOFF ]; | |
421 | ||
422 | case BFD_RELOC_XTENSA_TLS_TPOFF: | |
423 | TRACE ("BFD_RELOC_XTENSA_TLS_TPOFF"); | |
424 | return &elf_howto_table[(unsigned) R_XTENSA_TLS_TPOFF ]; | |
425 | ||
426 | case BFD_RELOC_XTENSA_TLS_FUNC: | |
427 | TRACE ("BFD_RELOC_XTENSA_TLS_FUNC"); | |
428 | return &elf_howto_table[(unsigned) R_XTENSA_TLS_FUNC ]; | |
429 | ||
430 | case BFD_RELOC_XTENSA_TLS_ARG: | |
431 | TRACE ("BFD_RELOC_XTENSA_TLS_ARG"); | |
432 | return &elf_howto_table[(unsigned) R_XTENSA_TLS_ARG ]; | |
433 | ||
434 | case BFD_RELOC_XTENSA_TLS_CALL: | |
435 | TRACE ("BFD_RELOC_XTENSA_TLS_CALL"); | |
436 | return &elf_howto_table[(unsigned) R_XTENSA_TLS_CALL ]; | |
437 | ||
e0001a05 | 438 | default: |
43cd72b9 BW |
439 | if (code >= BFD_RELOC_XTENSA_SLOT0_OP |
440 | && code <= BFD_RELOC_XTENSA_SLOT14_OP) | |
441 | { | |
442 | unsigned n = (R_XTENSA_SLOT0_OP + | |
443 | (code - BFD_RELOC_XTENSA_SLOT0_OP)); | |
444 | return &elf_howto_table[n]; | |
445 | } | |
446 | ||
447 | if (code >= BFD_RELOC_XTENSA_SLOT0_ALT | |
448 | && code <= BFD_RELOC_XTENSA_SLOT14_ALT) | |
449 | { | |
450 | unsigned n = (R_XTENSA_SLOT0_ALT + | |
451 | (code - BFD_RELOC_XTENSA_SLOT0_ALT)); | |
452 | return &elf_howto_table[n]; | |
453 | } | |
454 | ||
e0001a05 NC |
455 | break; |
456 | } | |
457 | ||
f3185997 | 458 | /* xgettext:c-format */ |
e8f5af78 | 459 | _bfd_error_handler (_("%pB: unsupported relocation type %#x"), abfd, (int) code); |
f3185997 | 460 | bfd_set_error (bfd_error_bad_value); |
e0001a05 NC |
461 | TRACE ("Unknown"); |
462 | return NULL; | |
463 | } | |
464 | ||
157090f7 AM |
465 | static reloc_howto_type * |
466 | elf_xtensa_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, | |
467 | const char *r_name) | |
468 | { | |
469 | unsigned int i; | |
470 | ||
471 | for (i = 0; i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); i++) | |
472 | if (elf_howto_table[i].name != NULL | |
473 | && strcasecmp (elf_howto_table[i].name, r_name) == 0) | |
474 | return &elf_howto_table[i]; | |
475 | ||
476 | return NULL; | |
477 | } | |
478 | ||
e0001a05 NC |
479 | |
480 | /* Given an ELF "rela" relocation, find the corresponding howto and record | |
481 | it in the BFD internal arelent representation of the relocation. */ | |
482 | ||
f3185997 | 483 | static bfd_boolean |
0aa13fee | 484 | elf_xtensa_info_to_howto_rela (bfd *abfd, |
7fa3d080 BW |
485 | arelent *cache_ptr, |
486 | Elf_Internal_Rela *dst) | |
e0001a05 NC |
487 | { |
488 | unsigned int r_type = ELF32_R_TYPE (dst->r_info); | |
489 | ||
5860e3f8 NC |
490 | if (r_type >= (unsigned int) R_XTENSA_max) |
491 | { | |
695344c0 | 492 | /* xgettext:c-format */ |
0aa13fee AM |
493 | _bfd_error_handler (_("%pB: unsupported relocation type %#x"), |
494 | abfd, r_type); | |
f3185997 NC |
495 | bfd_set_error (bfd_error_bad_value); |
496 | return FALSE; | |
5860e3f8 | 497 | } |
e0001a05 | 498 | cache_ptr->howto = &elf_howto_table[r_type]; |
f3185997 | 499 | return TRUE; |
e0001a05 NC |
500 | } |
501 | ||
502 | \f | |
503 | /* Functions for the Xtensa ELF linker. */ | |
504 | ||
505 | /* The name of the dynamic interpreter. This is put in the .interp | |
506 | section. */ | |
507 | ||
508 | #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so" | |
509 | ||
510 | /* The size in bytes of an entry in the procedure linkage table. | |
511 | (This does _not_ include the space for the literals associated with | |
512 | the PLT entry.) */ | |
513 | ||
514 | #define PLT_ENTRY_SIZE 16 | |
515 | ||
516 | /* For _really_ large PLTs, we may need to alternate between literals | |
517 | and code to keep the literals within the 256K range of the L32R | |
518 | instructions in the code. It's unlikely that anyone would ever need | |
519 | such a big PLT, but an arbitrary limit on the PLT size would be bad. | |
520 | Thus, we split the PLT into chunks. Since there's very little | |
521 | overhead (2 extra literals) for each chunk, the chunk size is kept | |
522 | small so that the code for handling multiple chunks get used and | |
523 | tested regularly. With 254 entries, there are 1K of literals for | |
524 | each chunk, and that seems like a nice round number. */ | |
525 | ||
526 | #define PLT_ENTRIES_PER_CHUNK 254 | |
527 | ||
528 | /* PLT entries are actually used as stub functions for lazy symbol | |
529 | resolution. Once the symbol is resolved, the stub function is never | |
530 | invoked. Note: the 32-byte frame size used here cannot be changed | |
531 | without a corresponding change in the runtime linker. */ | |
532 | ||
f7e16c2a | 533 | static const bfd_byte elf_xtensa_be_plt_entry[][PLT_ENTRY_SIZE] = |
e0001a05 | 534 | { |
f7e16c2a MF |
535 | { |
536 | 0x6c, 0x10, 0x04, /* entry sp, 32 */ | |
537 | 0x18, 0x00, 0x00, /* l32r a8, [got entry for rtld's resolver] */ | |
538 | 0x1a, 0x00, 0x00, /* l32r a10, [got entry for rtld's link map] */ | |
539 | 0x1b, 0x00, 0x00, /* l32r a11, [literal for reloc index] */ | |
540 | 0x0a, 0x80, 0x00, /* jx a8 */ | |
541 | 0 /* unused */ | |
542 | }, | |
543 | { | |
544 | 0x18, 0x00, 0x00, /* l32r a8, [got entry for rtld's resolver] */ | |
545 | 0x1a, 0x00, 0x00, /* l32r a10, [got entry for rtld's link map] */ | |
546 | 0x1b, 0x00, 0x00, /* l32r a11, [literal for reloc index] */ | |
547 | 0x0a, 0x80, 0x00, /* jx a8 */ | |
548 | 0 /* unused */ | |
549 | } | |
e0001a05 NC |
550 | }; |
551 | ||
f7e16c2a | 552 | static const bfd_byte elf_xtensa_le_plt_entry[][PLT_ENTRY_SIZE] = |
e0001a05 | 553 | { |
f7e16c2a MF |
554 | { |
555 | 0x36, 0x41, 0x00, /* entry sp, 32 */ | |
556 | 0x81, 0x00, 0x00, /* l32r a8, [got entry for rtld's resolver] */ | |
557 | 0xa1, 0x00, 0x00, /* l32r a10, [got entry for rtld's link map] */ | |
558 | 0xb1, 0x00, 0x00, /* l32r a11, [literal for reloc index] */ | |
559 | 0xa0, 0x08, 0x00, /* jx a8 */ | |
560 | 0 /* unused */ | |
561 | }, | |
562 | { | |
563 | 0x81, 0x00, 0x00, /* l32r a8, [got entry for rtld's resolver] */ | |
564 | 0xa1, 0x00, 0x00, /* l32r a10, [got entry for rtld's link map] */ | |
565 | 0xb1, 0x00, 0x00, /* l32r a11, [literal for reloc index] */ | |
566 | 0xa0, 0x08, 0x00, /* jx a8 */ | |
567 | 0 /* unused */ | |
568 | } | |
e0001a05 NC |
569 | }; |
570 | ||
28dbbc02 BW |
571 | /* The size of the thread control block. */ |
572 | #define TCB_SIZE 8 | |
573 | ||
574 | struct elf_xtensa_link_hash_entry | |
575 | { | |
576 | struct elf_link_hash_entry elf; | |
577 | ||
578 | bfd_signed_vma tlsfunc_refcount; | |
579 | ||
580 | #define GOT_UNKNOWN 0 | |
581 | #define GOT_NORMAL 1 | |
582 | #define GOT_TLS_GD 2 /* global or local dynamic */ | |
583 | #define GOT_TLS_IE 4 /* initial or local exec */ | |
584 | #define GOT_TLS_ANY (GOT_TLS_GD | GOT_TLS_IE) | |
585 | unsigned char tls_type; | |
586 | }; | |
587 | ||
588 | #define elf_xtensa_hash_entry(ent) ((struct elf_xtensa_link_hash_entry *)(ent)) | |
589 | ||
590 | struct elf_xtensa_obj_tdata | |
591 | { | |
592 | struct elf_obj_tdata root; | |
593 | ||
594 | /* tls_type for each local got entry. */ | |
595 | char *local_got_tls_type; | |
596 | ||
597 | bfd_signed_vma *local_tlsfunc_refcounts; | |
598 | }; | |
599 | ||
600 | #define elf_xtensa_tdata(abfd) \ | |
601 | ((struct elf_xtensa_obj_tdata *) (abfd)->tdata.any) | |
602 | ||
603 | #define elf_xtensa_local_got_tls_type(abfd) \ | |
604 | (elf_xtensa_tdata (abfd)->local_got_tls_type) | |
605 | ||
606 | #define elf_xtensa_local_tlsfunc_refcounts(abfd) \ | |
607 | (elf_xtensa_tdata (abfd)->local_tlsfunc_refcounts) | |
608 | ||
609 | #define is_xtensa_elf(bfd) \ | |
610 | (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ | |
611 | && elf_tdata (bfd) != NULL \ | |
4dfe6ac6 | 612 | && elf_object_id (bfd) == XTENSA_ELF_DATA) |
28dbbc02 BW |
613 | |
614 | static bfd_boolean | |
615 | elf_xtensa_mkobject (bfd *abfd) | |
616 | { | |
617 | return bfd_elf_allocate_object (abfd, sizeof (struct elf_xtensa_obj_tdata), | |
4dfe6ac6 | 618 | XTENSA_ELF_DATA); |
28dbbc02 BW |
619 | } |
620 | ||
f0e6fdb2 BW |
621 | /* Xtensa ELF linker hash table. */ |
622 | ||
623 | struct elf_xtensa_link_hash_table | |
624 | { | |
625 | struct elf_link_hash_table elf; | |
626 | ||
627 | /* Short-cuts to get to dynamic linker sections. */ | |
f0e6fdb2 BW |
628 | asection *sgotloc; |
629 | asection *spltlittbl; | |
630 | ||
631 | /* Total count of PLT relocations seen during check_relocs. | |
632 | The actual PLT code must be split into multiple sections and all | |
633 | the sections have to be created before size_dynamic_sections, | |
634 | where we figure out the exact number of PLT entries that will be | |
635 | needed. It is OK if this count is an overestimate, e.g., some | |
636 | relocations may be removed by GC. */ | |
637 | int plt_reloc_count; | |
28dbbc02 BW |
638 | |
639 | struct elf_xtensa_link_hash_entry *tlsbase; | |
f0e6fdb2 BW |
640 | }; |
641 | ||
642 | /* Get the Xtensa ELF linker hash table from a link_info structure. */ | |
643 | ||
644 | #define elf_xtensa_hash_table(p) \ | |
4dfe6ac6 NC |
645 | (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \ |
646 | == XTENSA_ELF_DATA ? ((struct elf_xtensa_link_hash_table *) ((p)->hash)) : NULL) | |
f0e6fdb2 | 647 | |
28dbbc02 BW |
648 | /* Create an entry in an Xtensa ELF linker hash table. */ |
649 | ||
650 | static struct bfd_hash_entry * | |
651 | elf_xtensa_link_hash_newfunc (struct bfd_hash_entry *entry, | |
652 | struct bfd_hash_table *table, | |
653 | const char *string) | |
654 | { | |
655 | /* Allocate the structure if it has not already been allocated by a | |
656 | subclass. */ | |
657 | if (entry == NULL) | |
658 | { | |
659 | entry = bfd_hash_allocate (table, | |
660 | sizeof (struct elf_xtensa_link_hash_entry)); | |
661 | if (entry == NULL) | |
662 | return entry; | |
663 | } | |
664 | ||
665 | /* Call the allocation method of the superclass. */ | |
666 | entry = _bfd_elf_link_hash_newfunc (entry, table, string); | |
667 | if (entry != NULL) | |
668 | { | |
669 | struct elf_xtensa_link_hash_entry *eh = elf_xtensa_hash_entry (entry); | |
670 | eh->tlsfunc_refcount = 0; | |
671 | eh->tls_type = GOT_UNKNOWN; | |
672 | } | |
673 | ||
674 | return entry; | |
675 | } | |
676 | ||
f0e6fdb2 BW |
677 | /* Create an Xtensa ELF linker hash table. */ |
678 | ||
679 | static struct bfd_link_hash_table * | |
680 | elf_xtensa_link_hash_table_create (bfd *abfd) | |
681 | { | |
28dbbc02 | 682 | struct elf_link_hash_entry *tlsbase; |
f0e6fdb2 BW |
683 | struct elf_xtensa_link_hash_table *ret; |
684 | bfd_size_type amt = sizeof (struct elf_xtensa_link_hash_table); | |
685 | ||
7bf52ea2 | 686 | ret = bfd_zmalloc (amt); |
f0e6fdb2 BW |
687 | if (ret == NULL) |
688 | return NULL; | |
689 | ||
690 | if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, | |
28dbbc02 | 691 | elf_xtensa_link_hash_newfunc, |
4dfe6ac6 NC |
692 | sizeof (struct elf_xtensa_link_hash_entry), |
693 | XTENSA_ELF_DATA)) | |
f0e6fdb2 BW |
694 | { |
695 | free (ret); | |
696 | return NULL; | |
697 | } | |
698 | ||
28dbbc02 BW |
699 | /* Create a hash entry for "_TLS_MODULE_BASE_" to speed up checking |
700 | for it later. */ | |
701 | tlsbase = elf_link_hash_lookup (&ret->elf, "_TLS_MODULE_BASE_", | |
702 | TRUE, FALSE, FALSE); | |
703 | tlsbase->root.type = bfd_link_hash_new; | |
704 | tlsbase->root.u.undef.abfd = NULL; | |
705 | tlsbase->non_elf = 0; | |
706 | ret->tlsbase = elf_xtensa_hash_entry (tlsbase); | |
707 | ret->tlsbase->tls_type = GOT_UNKNOWN; | |
708 | ||
f0e6fdb2 BW |
709 | return &ret->elf.root; |
710 | } | |
571b5725 | 711 | |
28dbbc02 BW |
712 | /* Copy the extra info we tack onto an elf_link_hash_entry. */ |
713 | ||
714 | static void | |
715 | elf_xtensa_copy_indirect_symbol (struct bfd_link_info *info, | |
716 | struct elf_link_hash_entry *dir, | |
717 | struct elf_link_hash_entry *ind) | |
718 | { | |
719 | struct elf_xtensa_link_hash_entry *edir, *eind; | |
720 | ||
721 | edir = elf_xtensa_hash_entry (dir); | |
722 | eind = elf_xtensa_hash_entry (ind); | |
723 | ||
724 | if (ind->root.type == bfd_link_hash_indirect) | |
725 | { | |
726 | edir->tlsfunc_refcount += eind->tlsfunc_refcount; | |
727 | eind->tlsfunc_refcount = 0; | |
728 | ||
729 | if (dir->got.refcount <= 0) | |
730 | { | |
731 | edir->tls_type = eind->tls_type; | |
732 | eind->tls_type = GOT_UNKNOWN; | |
733 | } | |
734 | } | |
735 | ||
736 | _bfd_elf_link_hash_copy_indirect (info, dir, ind); | |
737 | } | |
738 | ||
571b5725 | 739 | static inline bfd_boolean |
4608f3d9 | 740 | elf_xtensa_dynamic_symbol_p (struct elf_link_hash_entry *h, |
7fa3d080 | 741 | struct bfd_link_info *info) |
571b5725 BW |
742 | { |
743 | /* Check if we should do dynamic things to this symbol. The | |
744 | "ignore_protected" argument need not be set, because Xtensa code | |
745 | does not require special handling of STV_PROTECTED to make function | |
746 | pointer comparisons work properly. The PLT addresses are never | |
747 | used for function pointers. */ | |
748 | ||
749 | return _bfd_elf_dynamic_symbol_p (h, info, 0); | |
750 | } | |
751 | ||
e0001a05 NC |
752 | \f |
753 | static int | |
7fa3d080 | 754 | property_table_compare (const void *ap, const void *bp) |
e0001a05 NC |
755 | { |
756 | const property_table_entry *a = (const property_table_entry *) ap; | |
757 | const property_table_entry *b = (const property_table_entry *) bp; | |
758 | ||
43cd72b9 BW |
759 | if (a->address == b->address) |
760 | { | |
43cd72b9 BW |
761 | if (a->size != b->size) |
762 | return (a->size - b->size); | |
763 | ||
764 | if ((a->flags & XTENSA_PROP_ALIGN) != (b->flags & XTENSA_PROP_ALIGN)) | |
765 | return ((b->flags & XTENSA_PROP_ALIGN) | |
766 | - (a->flags & XTENSA_PROP_ALIGN)); | |
767 | ||
768 | if ((a->flags & XTENSA_PROP_ALIGN) | |
769 | && (GET_XTENSA_PROP_ALIGNMENT (a->flags) | |
770 | != GET_XTENSA_PROP_ALIGNMENT (b->flags))) | |
771 | return (GET_XTENSA_PROP_ALIGNMENT (a->flags) | |
772 | - GET_XTENSA_PROP_ALIGNMENT (b->flags)); | |
68ffbac6 | 773 | |
43cd72b9 BW |
774 | if ((a->flags & XTENSA_PROP_UNREACHABLE) |
775 | != (b->flags & XTENSA_PROP_UNREACHABLE)) | |
776 | return ((b->flags & XTENSA_PROP_UNREACHABLE) | |
777 | - (a->flags & XTENSA_PROP_UNREACHABLE)); | |
778 | ||
779 | return (a->flags - b->flags); | |
780 | } | |
781 | ||
782 | return (a->address - b->address); | |
783 | } | |
784 | ||
785 | ||
786 | static int | |
7fa3d080 | 787 | property_table_matches (const void *ap, const void *bp) |
43cd72b9 BW |
788 | { |
789 | const property_table_entry *a = (const property_table_entry *) ap; | |
790 | const property_table_entry *b = (const property_table_entry *) bp; | |
791 | ||
792 | /* Check if one entry overlaps with the other. */ | |
e0001a05 NC |
793 | if ((b->address >= a->address && b->address < (a->address + a->size)) |
794 | || (a->address >= b->address && a->address < (b->address + b->size))) | |
795 | return 0; | |
796 | ||
797 | return (a->address - b->address); | |
798 | } | |
799 | ||
800 | ||
43cd72b9 BW |
801 | /* Get the literal table or property table entries for the given |
802 | section. Sets TABLE_P and returns the number of entries. On | |
803 | error, returns a negative value. */ | |
e0001a05 | 804 | |
4b8e28c7 | 805 | int |
7fa3d080 BW |
806 | xtensa_read_table_entries (bfd *abfd, |
807 | asection *section, | |
808 | property_table_entry **table_p, | |
809 | const char *sec_name, | |
810 | bfd_boolean output_addr) | |
e0001a05 NC |
811 | { |
812 | asection *table_section; | |
e0001a05 NC |
813 | bfd_size_type table_size = 0; |
814 | bfd_byte *table_data; | |
815 | property_table_entry *blocks; | |
e4115460 | 816 | int blk, block_count; |
e0001a05 | 817 | bfd_size_type num_records; |
bcc2cc8e BW |
818 | Elf_Internal_Rela *internal_relocs, *irel, *rel_end; |
819 | bfd_vma section_addr, off; | |
43cd72b9 | 820 | flagword predef_flags; |
bcc2cc8e | 821 | bfd_size_type table_entry_size, section_limit; |
43cd72b9 BW |
822 | |
823 | if (!section | |
824 | || !(section->flags & SEC_ALLOC) | |
825 | || (section->flags & SEC_DEBUGGING)) | |
826 | { | |
827 | *table_p = NULL; | |
828 | return 0; | |
829 | } | |
e0001a05 | 830 | |
74869ac7 | 831 | table_section = xtensa_get_property_section (section, sec_name); |
43cd72b9 | 832 | if (table_section) |
eea6121a | 833 | table_size = table_section->size; |
43cd72b9 | 834 | |
68ffbac6 | 835 | if (table_size == 0) |
e0001a05 NC |
836 | { |
837 | *table_p = NULL; | |
838 | return 0; | |
839 | } | |
840 | ||
43cd72b9 BW |
841 | predef_flags = xtensa_get_property_predef_flags (table_section); |
842 | table_entry_size = 12; | |
843 | if (predef_flags) | |
844 | table_entry_size -= 4; | |
845 | ||
846 | num_records = table_size / table_entry_size; | |
e0001a05 NC |
847 | table_data = retrieve_contents (abfd, table_section, TRUE); |
848 | blocks = (property_table_entry *) | |
849 | bfd_malloc (num_records * sizeof (property_table_entry)); | |
850 | block_count = 0; | |
43cd72b9 BW |
851 | |
852 | if (output_addr) | |
853 | section_addr = section->output_section->vma + section->output_offset; | |
854 | else | |
855 | section_addr = section->vma; | |
3ba3bc8c | 856 | |
e0001a05 | 857 | internal_relocs = retrieve_internal_relocs (abfd, table_section, TRUE); |
3ba3bc8c | 858 | if (internal_relocs && !table_section->reloc_done) |
e0001a05 | 859 | { |
bcc2cc8e BW |
860 | qsort (internal_relocs, table_section->reloc_count, |
861 | sizeof (Elf_Internal_Rela), internal_reloc_compare); | |
862 | irel = internal_relocs; | |
863 | } | |
864 | else | |
865 | irel = NULL; | |
866 | ||
867 | section_limit = bfd_get_section_limit (abfd, section); | |
868 | rel_end = internal_relocs + table_section->reloc_count; | |
869 | ||
68ffbac6 | 870 | for (off = 0; off < table_size; off += table_entry_size) |
bcc2cc8e BW |
871 | { |
872 | bfd_vma address = bfd_get_32 (abfd, table_data + off); | |
873 | ||
874 | /* Skip any relocations before the current offset. This should help | |
875 | avoid confusion caused by unexpected relocations for the preceding | |
876 | table entry. */ | |
877 | while (irel && | |
878 | (irel->r_offset < off | |
879 | || (irel->r_offset == off | |
880 | && ELF32_R_TYPE (irel->r_info) == R_XTENSA_NONE))) | |
881 | { | |
882 | irel += 1; | |
883 | if (irel >= rel_end) | |
884 | irel = 0; | |
885 | } | |
e0001a05 | 886 | |
bcc2cc8e | 887 | if (irel && irel->r_offset == off) |
e0001a05 | 888 | { |
bcc2cc8e BW |
889 | bfd_vma sym_off; |
890 | unsigned long r_symndx = ELF32_R_SYM (irel->r_info); | |
891 | BFD_ASSERT (ELF32_R_TYPE (irel->r_info) == R_XTENSA_32); | |
e0001a05 | 892 | |
bcc2cc8e | 893 | if (get_elf_r_symndx_section (abfd, r_symndx) != section) |
e0001a05 NC |
894 | continue; |
895 | ||
bcc2cc8e BW |
896 | sym_off = get_elf_r_symndx_offset (abfd, r_symndx); |
897 | BFD_ASSERT (sym_off == 0); | |
898 | address += (section_addr + sym_off + irel->r_addend); | |
e0001a05 | 899 | } |
bcc2cc8e | 900 | else |
e0001a05 | 901 | { |
bcc2cc8e BW |
902 | if (address < section_addr |
903 | || address >= section_addr + section_limit) | |
904 | continue; | |
e0001a05 | 905 | } |
bcc2cc8e BW |
906 | |
907 | blocks[block_count].address = address; | |
908 | blocks[block_count].size = bfd_get_32 (abfd, table_data + off + 4); | |
909 | if (predef_flags) | |
910 | blocks[block_count].flags = predef_flags; | |
911 | else | |
912 | blocks[block_count].flags = bfd_get_32 (abfd, table_data + off + 8); | |
913 | block_count++; | |
e0001a05 NC |
914 | } |
915 | ||
916 | release_contents (table_section, table_data); | |
917 | release_internal_relocs (table_section, internal_relocs); | |
918 | ||
43cd72b9 | 919 | if (block_count > 0) |
e0001a05 NC |
920 | { |
921 | /* Now sort them into address order for easy reference. */ | |
922 | qsort (blocks, block_count, sizeof (property_table_entry), | |
923 | property_table_compare); | |
e4115460 BW |
924 | |
925 | /* Check that the table contents are valid. Problems may occur, | |
07d6d2b8 | 926 | for example, if an unrelocated object file is stripped. */ |
e4115460 BW |
927 | for (blk = 1; blk < block_count; blk++) |
928 | { | |
929 | /* The only circumstance where two entries may legitimately | |
930 | have the same address is when one of them is a zero-size | |
931 | placeholder to mark a place where fill can be inserted. | |
932 | The zero-size entry should come first. */ | |
933 | if (blocks[blk - 1].address == blocks[blk].address && | |
934 | blocks[blk - 1].size != 0) | |
935 | { | |
695344c0 | 936 | /* xgettext:c-format */ |
871b3ab2 | 937 | _bfd_error_handler (_("%pB(%pA): invalid property table"), |
4eca0228 | 938 | abfd, section); |
e4115460 BW |
939 | bfd_set_error (bfd_error_bad_value); |
940 | free (blocks); | |
941 | return -1; | |
942 | } | |
943 | } | |
e0001a05 | 944 | } |
43cd72b9 | 945 | |
e0001a05 NC |
946 | *table_p = blocks; |
947 | return block_count; | |
948 | } | |
949 | ||
950 | ||
7fa3d080 BW |
951 | static property_table_entry * |
952 | elf_xtensa_find_property_entry (property_table_entry *property_table, | |
953 | int property_table_size, | |
954 | bfd_vma addr) | |
e0001a05 NC |
955 | { |
956 | property_table_entry entry; | |
43cd72b9 | 957 | property_table_entry *rv; |
e0001a05 | 958 | |
43cd72b9 BW |
959 | if (property_table_size == 0) |
960 | return NULL; | |
e0001a05 NC |
961 | |
962 | entry.address = addr; | |
963 | entry.size = 1; | |
43cd72b9 | 964 | entry.flags = 0; |
e0001a05 | 965 | |
43cd72b9 BW |
966 | rv = bsearch (&entry, property_table, property_table_size, |
967 | sizeof (property_table_entry), property_table_matches); | |
968 | return rv; | |
969 | } | |
970 | ||
971 | ||
972 | static bfd_boolean | |
7fa3d080 BW |
973 | elf_xtensa_in_literal_pool (property_table_entry *lit_table, |
974 | int lit_table_size, | |
975 | bfd_vma addr) | |
43cd72b9 BW |
976 | { |
977 | if (elf_xtensa_find_property_entry (lit_table, lit_table_size, addr)) | |
e0001a05 NC |
978 | return TRUE; |
979 | ||
980 | return FALSE; | |
981 | } | |
982 | ||
983 | \f | |
984 | /* Look through the relocs for a section during the first phase, and | |
985 | calculate needed space in the dynamic reloc sections. */ | |
986 | ||
987 | static bfd_boolean | |
7fa3d080 BW |
988 | elf_xtensa_check_relocs (bfd *abfd, |
989 | struct bfd_link_info *info, | |
990 | asection *sec, | |
991 | const Elf_Internal_Rela *relocs) | |
e0001a05 | 992 | { |
f0e6fdb2 | 993 | struct elf_xtensa_link_hash_table *htab; |
e0001a05 NC |
994 | Elf_Internal_Shdr *symtab_hdr; |
995 | struct elf_link_hash_entry **sym_hashes; | |
996 | const Elf_Internal_Rela *rel; | |
997 | const Elf_Internal_Rela *rel_end; | |
e0001a05 | 998 | |
0e1862bb | 999 | if (bfd_link_relocatable (info) || (sec->flags & SEC_ALLOC) == 0) |
e0001a05 NC |
1000 | return TRUE; |
1001 | ||
28dbbc02 BW |
1002 | BFD_ASSERT (is_xtensa_elf (abfd)); |
1003 | ||
f0e6fdb2 | 1004 | htab = elf_xtensa_hash_table (info); |
4dfe6ac6 NC |
1005 | if (htab == NULL) |
1006 | return FALSE; | |
1007 | ||
e0001a05 NC |
1008 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
1009 | sym_hashes = elf_sym_hashes (abfd); | |
1010 | ||
e0001a05 NC |
1011 | rel_end = relocs + sec->reloc_count; |
1012 | for (rel = relocs; rel < rel_end; rel++) | |
1013 | { | |
1014 | unsigned int r_type; | |
d42c267e | 1015 | unsigned r_symndx; |
28dbbc02 BW |
1016 | struct elf_link_hash_entry *h = NULL; |
1017 | struct elf_xtensa_link_hash_entry *eh; | |
1018 | int tls_type, old_tls_type; | |
1019 | bfd_boolean is_got = FALSE; | |
1020 | bfd_boolean is_plt = FALSE; | |
1021 | bfd_boolean is_tlsfunc = FALSE; | |
e0001a05 NC |
1022 | |
1023 | r_symndx = ELF32_R_SYM (rel->r_info); | |
1024 | r_type = ELF32_R_TYPE (rel->r_info); | |
1025 | ||
1026 | if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) | |
1027 | { | |
695344c0 | 1028 | /* xgettext:c-format */ |
871b3ab2 | 1029 | _bfd_error_handler (_("%pB: bad symbol index: %d"), |
4eca0228 | 1030 | abfd, r_symndx); |
e0001a05 NC |
1031 | return FALSE; |
1032 | } | |
1033 | ||
28dbbc02 | 1034 | if (r_symndx >= symtab_hdr->sh_info) |
e0001a05 NC |
1035 | { |
1036 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
1037 | while (h->root.type == bfd_link_hash_indirect | |
1038 | || h->root.type == bfd_link_hash_warning) | |
1039 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1040 | } | |
28dbbc02 | 1041 | eh = elf_xtensa_hash_entry (h); |
e0001a05 NC |
1042 | |
1043 | switch (r_type) | |
1044 | { | |
28dbbc02 | 1045 | case R_XTENSA_TLSDESC_FN: |
0e1862bb | 1046 | if (bfd_link_pic (info)) |
28dbbc02 BW |
1047 | { |
1048 | tls_type = GOT_TLS_GD; | |
1049 | is_got = TRUE; | |
1050 | is_tlsfunc = TRUE; | |
1051 | } | |
1052 | else | |
1053 | tls_type = GOT_TLS_IE; | |
1054 | break; | |
e0001a05 | 1055 | |
28dbbc02 | 1056 | case R_XTENSA_TLSDESC_ARG: |
0e1862bb | 1057 | if (bfd_link_pic (info)) |
e0001a05 | 1058 | { |
28dbbc02 BW |
1059 | tls_type = GOT_TLS_GD; |
1060 | is_got = TRUE; | |
1061 | } | |
1062 | else | |
1063 | { | |
1064 | tls_type = GOT_TLS_IE; | |
1065 | if (h && elf_xtensa_hash_entry (h) != htab->tlsbase) | |
1066 | is_got = TRUE; | |
e0001a05 NC |
1067 | } |
1068 | break; | |
1069 | ||
28dbbc02 | 1070 | case R_XTENSA_TLS_DTPOFF: |
0e1862bb | 1071 | if (bfd_link_pic (info)) |
28dbbc02 BW |
1072 | tls_type = GOT_TLS_GD; |
1073 | else | |
1074 | tls_type = GOT_TLS_IE; | |
1075 | break; | |
1076 | ||
1077 | case R_XTENSA_TLS_TPOFF: | |
1078 | tls_type = GOT_TLS_IE; | |
0e1862bb | 1079 | if (bfd_link_pic (info)) |
28dbbc02 | 1080 | info->flags |= DF_STATIC_TLS; |
0e1862bb | 1081 | if (bfd_link_pic (info) || h) |
28dbbc02 BW |
1082 | is_got = TRUE; |
1083 | break; | |
1084 | ||
1085 | case R_XTENSA_32: | |
1086 | tls_type = GOT_NORMAL; | |
1087 | is_got = TRUE; | |
1088 | break; | |
1089 | ||
e0001a05 | 1090 | case R_XTENSA_PLT: |
28dbbc02 BW |
1091 | tls_type = GOT_NORMAL; |
1092 | is_plt = TRUE; | |
1093 | break; | |
e0001a05 | 1094 | |
28dbbc02 BW |
1095 | case R_XTENSA_GNU_VTINHERIT: |
1096 | /* This relocation describes the C++ object vtable hierarchy. | |
1097 | Reconstruct it for later use during GC. */ | |
1098 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) | |
1099 | return FALSE; | |
1100 | continue; | |
1101 | ||
1102 | case R_XTENSA_GNU_VTENTRY: | |
1103 | /* This relocation describes which C++ vtable entries are actually | |
1104 | used. Record for later use during GC. */ | |
1105 | BFD_ASSERT (h != NULL); | |
1106 | if (h != NULL | |
1107 | && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) | |
1108 | return FALSE; | |
1109 | continue; | |
1110 | ||
1111 | default: | |
1112 | /* Nothing to do for any other relocations. */ | |
1113 | continue; | |
1114 | } | |
1115 | ||
1116 | if (h) | |
1117 | { | |
1118 | if (is_plt) | |
e0001a05 | 1119 | { |
b45329f9 BW |
1120 | if (h->plt.refcount <= 0) |
1121 | { | |
1122 | h->needs_plt = 1; | |
1123 | h->plt.refcount = 1; | |
1124 | } | |
1125 | else | |
1126 | h->plt.refcount += 1; | |
e0001a05 NC |
1127 | |
1128 | /* Keep track of the total PLT relocation count even if we | |
1129 | don't yet know whether the dynamic sections will be | |
1130 | created. */ | |
f0e6fdb2 | 1131 | htab->plt_reloc_count += 1; |
e0001a05 NC |
1132 | |
1133 | if (elf_hash_table (info)->dynamic_sections_created) | |
1134 | { | |
f0e6fdb2 | 1135 | if (! add_extra_plt_sections (info, htab->plt_reloc_count)) |
e0001a05 NC |
1136 | return FALSE; |
1137 | } | |
1138 | } | |
28dbbc02 | 1139 | else if (is_got) |
b45329f9 BW |
1140 | { |
1141 | if (h->got.refcount <= 0) | |
1142 | h->got.refcount = 1; | |
1143 | else | |
1144 | h->got.refcount += 1; | |
1145 | } | |
28dbbc02 BW |
1146 | |
1147 | if (is_tlsfunc) | |
1148 | eh->tlsfunc_refcount += 1; | |
e0001a05 | 1149 | |
28dbbc02 BW |
1150 | old_tls_type = eh->tls_type; |
1151 | } | |
1152 | else | |
1153 | { | |
1154 | /* Allocate storage the first time. */ | |
1155 | if (elf_local_got_refcounts (abfd) == NULL) | |
e0001a05 | 1156 | { |
28dbbc02 BW |
1157 | bfd_size_type size = symtab_hdr->sh_info; |
1158 | void *mem; | |
e0001a05 | 1159 | |
28dbbc02 BW |
1160 | mem = bfd_zalloc (abfd, size * sizeof (bfd_signed_vma)); |
1161 | if (mem == NULL) | |
1162 | return FALSE; | |
1163 | elf_local_got_refcounts (abfd) = (bfd_signed_vma *) mem; | |
e0001a05 | 1164 | |
28dbbc02 BW |
1165 | mem = bfd_zalloc (abfd, size); |
1166 | if (mem == NULL) | |
1167 | return FALSE; | |
1168 | elf_xtensa_local_got_tls_type (abfd) = (char *) mem; | |
1169 | ||
1170 | mem = bfd_zalloc (abfd, size * sizeof (bfd_signed_vma)); | |
1171 | if (mem == NULL) | |
1172 | return FALSE; | |
1173 | elf_xtensa_local_tlsfunc_refcounts (abfd) | |
1174 | = (bfd_signed_vma *) mem; | |
e0001a05 | 1175 | } |
e0001a05 | 1176 | |
28dbbc02 BW |
1177 | /* This is a global offset table entry for a local symbol. */ |
1178 | if (is_got || is_plt) | |
1179 | elf_local_got_refcounts (abfd) [r_symndx] += 1; | |
e0001a05 | 1180 | |
28dbbc02 BW |
1181 | if (is_tlsfunc) |
1182 | elf_xtensa_local_tlsfunc_refcounts (abfd) [r_symndx] += 1; | |
e0001a05 | 1183 | |
28dbbc02 BW |
1184 | old_tls_type = elf_xtensa_local_got_tls_type (abfd) [r_symndx]; |
1185 | } | |
1186 | ||
1187 | if ((old_tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_IE)) | |
1188 | tls_type |= old_tls_type; | |
1189 | /* If a TLS symbol is accessed using IE at least once, | |
1190 | there is no point to use a dynamic model for it. */ | |
1191 | else if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN | |
1192 | && ((old_tls_type & GOT_TLS_GD) == 0 | |
1193 | || (tls_type & GOT_TLS_IE) == 0)) | |
1194 | { | |
1195 | if ((old_tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_GD)) | |
1196 | tls_type = old_tls_type; | |
1197 | else if ((old_tls_type & GOT_TLS_GD) && (tls_type & GOT_TLS_GD)) | |
1198 | tls_type |= old_tls_type; | |
1199 | else | |
1200 | { | |
4eca0228 | 1201 | _bfd_error_handler |
695344c0 | 1202 | /* xgettext:c-format */ |
871b3ab2 | 1203 | (_("%pB: `%s' accessed both as normal and thread local symbol"), |
28dbbc02 BW |
1204 | abfd, |
1205 | h ? h->root.root.string : "<local>"); | |
1206 | return FALSE; | |
1207 | } | |
1208 | } | |
1209 | ||
1210 | if (old_tls_type != tls_type) | |
1211 | { | |
1212 | if (eh) | |
1213 | eh->tls_type = tls_type; | |
1214 | else | |
1215 | elf_xtensa_local_got_tls_type (abfd) [r_symndx] = tls_type; | |
e0001a05 NC |
1216 | } |
1217 | } | |
1218 | ||
e0001a05 NC |
1219 | return TRUE; |
1220 | } | |
1221 | ||
1222 | ||
95147441 BW |
1223 | static void |
1224 | elf_xtensa_make_sym_local (struct bfd_link_info *info, | |
07d6d2b8 | 1225 | struct elf_link_hash_entry *h) |
95147441 | 1226 | { |
0e1862bb | 1227 | if (bfd_link_pic (info)) |
95147441 BW |
1228 | { |
1229 | if (h->plt.refcount > 0) | |
07d6d2b8 | 1230 | { |
95147441 BW |
1231 | /* For shared objects, there's no need for PLT entries for local |
1232 | symbols (use RELATIVE relocs instead of JMP_SLOT relocs). */ | |
07d6d2b8 AM |
1233 | if (h->got.refcount < 0) |
1234 | h->got.refcount = 0; | |
1235 | h->got.refcount += h->plt.refcount; | |
1236 | h->plt.refcount = 0; | |
1237 | } | |
95147441 BW |
1238 | } |
1239 | else | |
1240 | { | |
1241 | /* Don't need any dynamic relocations at all. */ | |
1242 | h->plt.refcount = 0; | |
1243 | h->got.refcount = 0; | |
1244 | } | |
1245 | } | |
1246 | ||
1247 | ||
1248 | static void | |
1249 | elf_xtensa_hide_symbol (struct bfd_link_info *info, | |
07d6d2b8 AM |
1250 | struct elf_link_hash_entry *h, |
1251 | bfd_boolean force_local) | |
95147441 BW |
1252 | { |
1253 | /* For a shared link, move the plt refcount to the got refcount to leave | |
1254 | space for RELATIVE relocs. */ | |
1255 | elf_xtensa_make_sym_local (info, h); | |
1256 | ||
1257 | _bfd_elf_link_hash_hide_symbol (info, h, force_local); | |
1258 | } | |
1259 | ||
1260 | ||
e0001a05 NC |
1261 | /* Return the section that should be marked against GC for a given |
1262 | relocation. */ | |
1263 | ||
1264 | static asection * | |
7fa3d080 | 1265 | elf_xtensa_gc_mark_hook (asection *sec, |
07adf181 | 1266 | struct bfd_link_info *info, |
7fa3d080 BW |
1267 | Elf_Internal_Rela *rel, |
1268 | struct elf_link_hash_entry *h, | |
1269 | Elf_Internal_Sym *sym) | |
e0001a05 | 1270 | { |
e1e5c0b5 BW |
1271 | /* Property sections are marked "KEEP" in the linker scripts, but they |
1272 | should not cause other sections to be marked. (This approach relies | |
1273 | on elf_xtensa_discard_info to remove property table entries that | |
1274 | describe discarded sections. Alternatively, it might be more | |
1275 | efficient to avoid using "KEEP" in the linker scripts and instead use | |
1276 | the gc_mark_extra_sections hook to mark only the property sections | |
1277 | that describe marked sections. That alternative does not work well | |
1278 | with the current property table sections, which do not correspond | |
1279 | one-to-one with the sections they describe, but that should be fixed | |
1280 | someday.) */ | |
1281 | if (xtensa_is_property_section (sec)) | |
1282 | return NULL; | |
1283 | ||
07adf181 AM |
1284 | if (h != NULL) |
1285 | switch (ELF32_R_TYPE (rel->r_info)) | |
1286 | { | |
1287 | case R_XTENSA_GNU_VTINHERIT: | |
1288 | case R_XTENSA_GNU_VTENTRY: | |
1289 | return NULL; | |
1290 | } | |
1291 | ||
1292 | return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); | |
e0001a05 NC |
1293 | } |
1294 | ||
7fa3d080 | 1295 | |
e0001a05 NC |
1296 | /* Create all the dynamic sections. */ |
1297 | ||
1298 | static bfd_boolean | |
7fa3d080 | 1299 | elf_xtensa_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info) |
e0001a05 | 1300 | { |
f0e6fdb2 | 1301 | struct elf_xtensa_link_hash_table *htab; |
e901de89 | 1302 | flagword flags, noalloc_flags; |
f0e6fdb2 BW |
1303 | |
1304 | htab = elf_xtensa_hash_table (info); | |
4dfe6ac6 NC |
1305 | if (htab == NULL) |
1306 | return FALSE; | |
e0001a05 NC |
1307 | |
1308 | /* First do all the standard stuff. */ | |
1309 | if (! _bfd_elf_create_dynamic_sections (dynobj, info)) | |
1310 | return FALSE; | |
1311 | ||
1312 | /* Create any extra PLT sections in case check_relocs has already | |
1313 | been called on all the non-dynamic input files. */ | |
f0e6fdb2 | 1314 | if (! add_extra_plt_sections (info, htab->plt_reloc_count)) |
e0001a05 NC |
1315 | return FALSE; |
1316 | ||
e901de89 BW |
1317 | noalloc_flags = (SEC_HAS_CONTENTS | SEC_IN_MEMORY |
1318 | | SEC_LINKER_CREATED | SEC_READONLY); | |
1319 | flags = noalloc_flags | SEC_ALLOC | SEC_LOAD; | |
e0001a05 NC |
1320 | |
1321 | /* Mark the ".got.plt" section READONLY. */ | |
ce558b89 AM |
1322 | if (htab->elf.sgotplt == NULL |
1323 | || ! bfd_set_section_flags (dynobj, htab->elf.sgotplt, flags)) | |
e0001a05 NC |
1324 | return FALSE; |
1325 | ||
e901de89 | 1326 | /* Create ".got.loc" (literal tables for use by dynamic linker). */ |
3d4d4302 AM |
1327 | htab->sgotloc = bfd_make_section_anyway_with_flags (dynobj, ".got.loc", |
1328 | flags); | |
f0e6fdb2 BW |
1329 | if (htab->sgotloc == NULL |
1330 | || ! bfd_set_section_alignment (dynobj, htab->sgotloc, 2)) | |
e901de89 BW |
1331 | return FALSE; |
1332 | ||
e0001a05 | 1333 | /* Create ".xt.lit.plt" (literal table for ".got.plt*"). */ |
3d4d4302 AM |
1334 | htab->spltlittbl = bfd_make_section_anyway_with_flags (dynobj, ".xt.lit.plt", |
1335 | noalloc_flags); | |
f0e6fdb2 BW |
1336 | if (htab->spltlittbl == NULL |
1337 | || ! bfd_set_section_alignment (dynobj, htab->spltlittbl, 2)) | |
e0001a05 NC |
1338 | return FALSE; |
1339 | ||
1340 | return TRUE; | |
1341 | } | |
1342 | ||
1343 | ||
1344 | static bfd_boolean | |
f0e6fdb2 | 1345 | add_extra_plt_sections (struct bfd_link_info *info, int count) |
e0001a05 | 1346 | { |
f0e6fdb2 | 1347 | bfd *dynobj = elf_hash_table (info)->dynobj; |
e0001a05 NC |
1348 | int chunk; |
1349 | ||
1350 | /* Iterate over all chunks except 0 which uses the standard ".plt" and | |
1351 | ".got.plt" sections. */ | |
1352 | for (chunk = count / PLT_ENTRIES_PER_CHUNK; chunk > 0; chunk--) | |
1353 | { | |
1354 | char *sname; | |
1355 | flagword flags; | |
1356 | asection *s; | |
1357 | ||
1358 | /* Stop when we find a section has already been created. */ | |
f0e6fdb2 | 1359 | if (elf_xtensa_get_plt_section (info, chunk)) |
e0001a05 NC |
1360 | break; |
1361 | ||
1362 | flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY | |
1363 | | SEC_LINKER_CREATED | SEC_READONLY); | |
1364 | ||
1365 | sname = (char *) bfd_malloc (10); | |
1366 | sprintf (sname, ".plt.%u", chunk); | |
3d4d4302 | 1367 | s = bfd_make_section_anyway_with_flags (dynobj, sname, flags | SEC_CODE); |
e0001a05 | 1368 | if (s == NULL |
e0001a05 NC |
1369 | || ! bfd_set_section_alignment (dynobj, s, 2)) |
1370 | return FALSE; | |
1371 | ||
1372 | sname = (char *) bfd_malloc (14); | |
1373 | sprintf (sname, ".got.plt.%u", chunk); | |
3d4d4302 | 1374 | s = bfd_make_section_anyway_with_flags (dynobj, sname, flags); |
e0001a05 | 1375 | if (s == NULL |
e0001a05 NC |
1376 | || ! bfd_set_section_alignment (dynobj, s, 2)) |
1377 | return FALSE; | |
1378 | } | |
1379 | ||
1380 | return TRUE; | |
1381 | } | |
1382 | ||
1383 | ||
1384 | /* Adjust a symbol defined by a dynamic object and referenced by a | |
1385 | regular object. The current definition is in some section of the | |
1386 | dynamic object, but we're not including those sections. We have to | |
1387 | change the definition to something the rest of the link can | |
1388 | understand. */ | |
1389 | ||
1390 | static bfd_boolean | |
7fa3d080 BW |
1391 | elf_xtensa_adjust_dynamic_symbol (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
1392 | struct elf_link_hash_entry *h) | |
e0001a05 NC |
1393 | { |
1394 | /* If this is a weak symbol, and there is a real definition, the | |
1395 | processor independent code will have arranged for us to see the | |
1396 | real definition first, and we can just use the same value. */ | |
60d67dc8 | 1397 | if (h->is_weakalias) |
e0001a05 | 1398 | { |
60d67dc8 AM |
1399 | struct elf_link_hash_entry *def = weakdef (h); |
1400 | BFD_ASSERT (def->root.type == bfd_link_hash_defined); | |
1401 | h->root.u.def.section = def->root.u.def.section; | |
1402 | h->root.u.def.value = def->root.u.def.value; | |
e0001a05 NC |
1403 | return TRUE; |
1404 | } | |
1405 | ||
1406 | /* This is a reference to a symbol defined by a dynamic object. The | |
1407 | reference must go through the GOT, so there's no need for COPY relocs, | |
1408 | .dynbss, etc. */ | |
1409 | ||
1410 | return TRUE; | |
1411 | } | |
1412 | ||
1413 | ||
e0001a05 | 1414 | static bfd_boolean |
f1ab2340 | 1415 | elf_xtensa_allocate_dynrelocs (struct elf_link_hash_entry *h, void *arg) |
e0001a05 | 1416 | { |
f1ab2340 BW |
1417 | struct bfd_link_info *info; |
1418 | struct elf_xtensa_link_hash_table *htab; | |
28dbbc02 | 1419 | struct elf_xtensa_link_hash_entry *eh = elf_xtensa_hash_entry (h); |
e0001a05 | 1420 | |
f1ab2340 BW |
1421 | if (h->root.type == bfd_link_hash_indirect) |
1422 | return TRUE; | |
e0001a05 | 1423 | |
f1ab2340 BW |
1424 | info = (struct bfd_link_info *) arg; |
1425 | htab = elf_xtensa_hash_table (info); | |
4dfe6ac6 NC |
1426 | if (htab == NULL) |
1427 | return FALSE; | |
e0001a05 | 1428 | |
28dbbc02 BW |
1429 | /* If we saw any use of an IE model for this symbol, we can then optimize |
1430 | away GOT entries for any TLSDESC_FN relocs. */ | |
1431 | if ((eh->tls_type & GOT_TLS_IE) != 0) | |
1432 | { | |
1433 | BFD_ASSERT (h->got.refcount >= eh->tlsfunc_refcount); | |
1434 | h->got.refcount -= eh->tlsfunc_refcount; | |
1435 | } | |
e0001a05 | 1436 | |
28dbbc02 | 1437 | if (! elf_xtensa_dynamic_symbol_p (h, info)) |
95147441 | 1438 | elf_xtensa_make_sym_local (info, h); |
e0001a05 | 1439 | |
c451bb34 MF |
1440 | if (! elf_xtensa_dynamic_symbol_p (h, info) |
1441 | && h->root.type == bfd_link_hash_undefweak) | |
1442 | return TRUE; | |
1443 | ||
f1ab2340 | 1444 | if (h->plt.refcount > 0) |
ce558b89 | 1445 | htab->elf.srelplt->size += (h->plt.refcount * sizeof (Elf32_External_Rela)); |
e0001a05 NC |
1446 | |
1447 | if (h->got.refcount > 0) | |
ce558b89 | 1448 | htab->elf.srelgot->size += (h->got.refcount * sizeof (Elf32_External_Rela)); |
e0001a05 NC |
1449 | |
1450 | return TRUE; | |
1451 | } | |
1452 | ||
1453 | ||
1454 | static void | |
f0e6fdb2 | 1455 | elf_xtensa_allocate_local_got_size (struct bfd_link_info *info) |
e0001a05 | 1456 | { |
f0e6fdb2 | 1457 | struct elf_xtensa_link_hash_table *htab; |
e0001a05 NC |
1458 | bfd *i; |
1459 | ||
f0e6fdb2 | 1460 | htab = elf_xtensa_hash_table (info); |
4dfe6ac6 NC |
1461 | if (htab == NULL) |
1462 | return; | |
f0e6fdb2 | 1463 | |
c72f2fb2 | 1464 | for (i = info->input_bfds; i; i = i->link.next) |
e0001a05 NC |
1465 | { |
1466 | bfd_signed_vma *local_got_refcounts; | |
1467 | bfd_size_type j, cnt; | |
1468 | Elf_Internal_Shdr *symtab_hdr; | |
1469 | ||
1470 | local_got_refcounts = elf_local_got_refcounts (i); | |
1471 | if (!local_got_refcounts) | |
1472 | continue; | |
1473 | ||
1474 | symtab_hdr = &elf_tdata (i)->symtab_hdr; | |
1475 | cnt = symtab_hdr->sh_info; | |
1476 | ||
1477 | for (j = 0; j < cnt; ++j) | |
1478 | { | |
28dbbc02 BW |
1479 | /* If we saw any use of an IE model for this symbol, we can |
1480 | then optimize away GOT entries for any TLSDESC_FN relocs. */ | |
1481 | if ((elf_xtensa_local_got_tls_type (i) [j] & GOT_TLS_IE) != 0) | |
1482 | { | |
1483 | bfd_signed_vma *tlsfunc_refcount | |
1484 | = &elf_xtensa_local_tlsfunc_refcounts (i) [j]; | |
1485 | BFD_ASSERT (local_got_refcounts[j] >= *tlsfunc_refcount); | |
1486 | local_got_refcounts[j] -= *tlsfunc_refcount; | |
1487 | } | |
1488 | ||
e0001a05 | 1489 | if (local_got_refcounts[j] > 0) |
ce558b89 AM |
1490 | htab->elf.srelgot->size += (local_got_refcounts[j] |
1491 | * sizeof (Elf32_External_Rela)); | |
e0001a05 NC |
1492 | } |
1493 | } | |
1494 | } | |
1495 | ||
1496 | ||
1497 | /* Set the sizes of the dynamic sections. */ | |
1498 | ||
1499 | static bfd_boolean | |
7fa3d080 BW |
1500 | elf_xtensa_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, |
1501 | struct bfd_link_info *info) | |
e0001a05 | 1502 | { |
f0e6fdb2 | 1503 | struct elf_xtensa_link_hash_table *htab; |
e901de89 BW |
1504 | bfd *dynobj, *abfd; |
1505 | asection *s, *srelplt, *splt, *sgotplt, *srelgot, *spltlittbl, *sgotloc; | |
e0001a05 NC |
1506 | bfd_boolean relplt, relgot; |
1507 | int plt_entries, plt_chunks, chunk; | |
1508 | ||
1509 | plt_entries = 0; | |
1510 | plt_chunks = 0; | |
e0001a05 | 1511 | |
f0e6fdb2 | 1512 | htab = elf_xtensa_hash_table (info); |
4dfe6ac6 NC |
1513 | if (htab == NULL) |
1514 | return FALSE; | |
1515 | ||
e0001a05 NC |
1516 | dynobj = elf_hash_table (info)->dynobj; |
1517 | if (dynobj == NULL) | |
1518 | abort (); | |
ce558b89 AM |
1519 | srelgot = htab->elf.srelgot; |
1520 | srelplt = htab->elf.srelplt; | |
e0001a05 NC |
1521 | |
1522 | if (elf_hash_table (info)->dynamic_sections_created) | |
1523 | { | |
ce558b89 AM |
1524 | BFD_ASSERT (htab->elf.srelgot != NULL |
1525 | && htab->elf.srelplt != NULL | |
1526 | && htab->elf.sgot != NULL | |
f0e6fdb2 BW |
1527 | && htab->spltlittbl != NULL |
1528 | && htab->sgotloc != NULL); | |
1529 | ||
e0001a05 | 1530 | /* Set the contents of the .interp section to the interpreter. */ |
9b8b325a | 1531 | if (bfd_link_executable (info) && !info->nointerp) |
e0001a05 | 1532 | { |
3d4d4302 | 1533 | s = bfd_get_linker_section (dynobj, ".interp"); |
e0001a05 NC |
1534 | if (s == NULL) |
1535 | abort (); | |
eea6121a | 1536 | s->size = sizeof ELF_DYNAMIC_INTERPRETER; |
e0001a05 NC |
1537 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
1538 | } | |
1539 | ||
1540 | /* Allocate room for one word in ".got". */ | |
ce558b89 | 1541 | htab->elf.sgot->size = 4; |
e0001a05 | 1542 | |
f1ab2340 BW |
1543 | /* Allocate space in ".rela.got" for literals that reference global |
1544 | symbols and space in ".rela.plt" for literals that have PLT | |
1545 | entries. */ | |
e0001a05 | 1546 | elf_link_hash_traverse (elf_hash_table (info), |
f1ab2340 | 1547 | elf_xtensa_allocate_dynrelocs, |
7fa3d080 | 1548 | (void *) info); |
e0001a05 | 1549 | |
e0001a05 NC |
1550 | /* If we are generating a shared object, we also need space in |
1551 | ".rela.got" for R_XTENSA_RELATIVE relocs for literals that | |
1552 | reference local symbols. */ | |
0e1862bb | 1553 | if (bfd_link_pic (info)) |
f0e6fdb2 | 1554 | elf_xtensa_allocate_local_got_size (info); |
e0001a05 | 1555 | |
e0001a05 NC |
1556 | /* Allocate space in ".plt" to match the size of ".rela.plt". For |
1557 | each PLT entry, we need the PLT code plus a 4-byte literal. | |
1558 | For each chunk of ".plt", we also need two more 4-byte | |
1559 | literals, two corresponding entries in ".rela.got", and an | |
1560 | 8-byte entry in ".xt.lit.plt". */ | |
f0e6fdb2 | 1561 | spltlittbl = htab->spltlittbl; |
eea6121a | 1562 | plt_entries = srelplt->size / sizeof (Elf32_External_Rela); |
e0001a05 NC |
1563 | plt_chunks = |
1564 | (plt_entries + PLT_ENTRIES_PER_CHUNK - 1) / PLT_ENTRIES_PER_CHUNK; | |
1565 | ||
1566 | /* Iterate over all the PLT chunks, including any extra sections | |
1567 | created earlier because the initial count of PLT relocations | |
1568 | was an overestimate. */ | |
1569 | for (chunk = 0; | |
f0e6fdb2 | 1570 | (splt = elf_xtensa_get_plt_section (info, chunk)) != NULL; |
e0001a05 NC |
1571 | chunk++) |
1572 | { | |
1573 | int chunk_entries; | |
1574 | ||
f0e6fdb2 BW |
1575 | sgotplt = elf_xtensa_get_gotplt_section (info, chunk); |
1576 | BFD_ASSERT (sgotplt != NULL); | |
e0001a05 NC |
1577 | |
1578 | if (chunk < plt_chunks - 1) | |
1579 | chunk_entries = PLT_ENTRIES_PER_CHUNK; | |
1580 | else if (chunk == plt_chunks - 1) | |
1581 | chunk_entries = plt_entries - (chunk * PLT_ENTRIES_PER_CHUNK); | |
1582 | else | |
1583 | chunk_entries = 0; | |
1584 | ||
1585 | if (chunk_entries != 0) | |
1586 | { | |
eea6121a AM |
1587 | sgotplt->size = 4 * (chunk_entries + 2); |
1588 | splt->size = PLT_ENTRY_SIZE * chunk_entries; | |
1589 | srelgot->size += 2 * sizeof (Elf32_External_Rela); | |
1590 | spltlittbl->size += 8; | |
e0001a05 NC |
1591 | } |
1592 | else | |
1593 | { | |
eea6121a AM |
1594 | sgotplt->size = 0; |
1595 | splt->size = 0; | |
e0001a05 NC |
1596 | } |
1597 | } | |
e901de89 BW |
1598 | |
1599 | /* Allocate space in ".got.loc" to match the total size of all the | |
1600 | literal tables. */ | |
f0e6fdb2 | 1601 | sgotloc = htab->sgotloc; |
eea6121a | 1602 | sgotloc->size = spltlittbl->size; |
c72f2fb2 | 1603 | for (abfd = info->input_bfds; abfd != NULL; abfd = abfd->link.next) |
e901de89 BW |
1604 | { |
1605 | if (abfd->flags & DYNAMIC) | |
1606 | continue; | |
1607 | for (s = abfd->sections; s != NULL; s = s->next) | |
1608 | { | |
dbaa2011 | 1609 | if (! discarded_section (s) |
b536dc1e BW |
1610 | && xtensa_is_littable_section (s) |
1611 | && s != spltlittbl) | |
eea6121a | 1612 | sgotloc->size += s->size; |
e901de89 BW |
1613 | } |
1614 | } | |
e0001a05 NC |
1615 | } |
1616 | ||
1617 | /* Allocate memory for dynamic sections. */ | |
1618 | relplt = FALSE; | |
1619 | relgot = FALSE; | |
1620 | for (s = dynobj->sections; s != NULL; s = s->next) | |
1621 | { | |
1622 | const char *name; | |
e0001a05 NC |
1623 | |
1624 | if ((s->flags & SEC_LINKER_CREATED) == 0) | |
1625 | continue; | |
1626 | ||
1627 | /* It's OK to base decisions on the section name, because none | |
1628 | of the dynobj section names depend upon the input files. */ | |
1629 | name = bfd_get_section_name (dynobj, s); | |
1630 | ||
0112cd26 | 1631 | if (CONST_STRNEQ (name, ".rela")) |
e0001a05 | 1632 | { |
c456f082 | 1633 | if (s->size != 0) |
e0001a05 | 1634 | { |
c456f082 AM |
1635 | if (strcmp (name, ".rela.plt") == 0) |
1636 | relplt = TRUE; | |
1637 | else if (strcmp (name, ".rela.got") == 0) | |
1638 | relgot = TRUE; | |
1639 | ||
1640 | /* We use the reloc_count field as a counter if we need | |
1641 | to copy relocs into the output file. */ | |
1642 | s->reloc_count = 0; | |
e0001a05 NC |
1643 | } |
1644 | } | |
0112cd26 NC |
1645 | else if (! CONST_STRNEQ (name, ".plt.") |
1646 | && ! CONST_STRNEQ (name, ".got.plt.") | |
c456f082 | 1647 | && strcmp (name, ".got") != 0 |
e0001a05 NC |
1648 | && strcmp (name, ".plt") != 0 |
1649 | && strcmp (name, ".got.plt") != 0 | |
e901de89 BW |
1650 | && strcmp (name, ".xt.lit.plt") != 0 |
1651 | && strcmp (name, ".got.loc") != 0) | |
e0001a05 NC |
1652 | { |
1653 | /* It's not one of our sections, so don't allocate space. */ | |
1654 | continue; | |
1655 | } | |
1656 | ||
c456f082 AM |
1657 | if (s->size == 0) |
1658 | { | |
1659 | /* If we don't need this section, strip it from the output | |
1660 | file. We must create the ".plt*" and ".got.plt*" | |
1661 | sections in create_dynamic_sections and/or check_relocs | |
1662 | based on a conservative estimate of the PLT relocation | |
1663 | count, because the sections must be created before the | |
1664 | linker maps input sections to output sections. The | |
1665 | linker does that before size_dynamic_sections, where we | |
1666 | compute the exact size of the PLT, so there may be more | |
1667 | of these sections than are actually needed. */ | |
1668 | s->flags |= SEC_EXCLUDE; | |
1669 | } | |
1670 | else if ((s->flags & SEC_HAS_CONTENTS) != 0) | |
e0001a05 NC |
1671 | { |
1672 | /* Allocate memory for the section contents. */ | |
eea6121a | 1673 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); |
c456f082 | 1674 | if (s->contents == NULL) |
e0001a05 NC |
1675 | return FALSE; |
1676 | } | |
1677 | } | |
1678 | ||
1679 | if (elf_hash_table (info)->dynamic_sections_created) | |
1680 | { | |
1681 | /* Add the special XTENSA_RTLD relocations now. The offsets won't be | |
1682 | known until finish_dynamic_sections, but we need to get the relocs | |
1683 | in place before they are sorted. */ | |
e0001a05 NC |
1684 | for (chunk = 0; chunk < plt_chunks; chunk++) |
1685 | { | |
1686 | Elf_Internal_Rela irela; | |
1687 | bfd_byte *loc; | |
1688 | ||
1689 | irela.r_offset = 0; | |
1690 | irela.r_info = ELF32_R_INFO (0, R_XTENSA_RTLD); | |
1691 | irela.r_addend = 0; | |
1692 | ||
1693 | loc = (srelgot->contents | |
1694 | + srelgot->reloc_count * sizeof (Elf32_External_Rela)); | |
1695 | bfd_elf32_swap_reloca_out (output_bfd, &irela, loc); | |
1696 | bfd_elf32_swap_reloca_out (output_bfd, &irela, | |
1697 | loc + sizeof (Elf32_External_Rela)); | |
1698 | srelgot->reloc_count += 2; | |
1699 | } | |
1700 | ||
1701 | /* Add some entries to the .dynamic section. We fill in the | |
1702 | values later, in elf_xtensa_finish_dynamic_sections, but we | |
1703 | must add the entries now so that we get the correct size for | |
1704 | the .dynamic section. The DT_DEBUG entry is filled in by the | |
1705 | dynamic linker and used by the debugger. */ | |
1706 | #define add_dynamic_entry(TAG, VAL) \ | |
5a580b3a | 1707 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) |
e0001a05 | 1708 | |
0e1862bb | 1709 | if (bfd_link_executable (info)) |
e0001a05 NC |
1710 | { |
1711 | if (!add_dynamic_entry (DT_DEBUG, 0)) | |
1712 | return FALSE; | |
1713 | } | |
1714 | ||
1715 | if (relplt) | |
1716 | { | |
c243ad3b | 1717 | if (!add_dynamic_entry (DT_PLTRELSZ, 0) |
e0001a05 NC |
1718 | || !add_dynamic_entry (DT_PLTREL, DT_RELA) |
1719 | || !add_dynamic_entry (DT_JMPREL, 0)) | |
1720 | return FALSE; | |
1721 | } | |
1722 | ||
1723 | if (relgot) | |
1724 | { | |
1725 | if (!add_dynamic_entry (DT_RELA, 0) | |
1726 | || !add_dynamic_entry (DT_RELASZ, 0) | |
1727 | || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela))) | |
1728 | return FALSE; | |
1729 | } | |
1730 | ||
c243ad3b BW |
1731 | if (!add_dynamic_entry (DT_PLTGOT, 0) |
1732 | || !add_dynamic_entry (DT_XTENSA_GOT_LOC_OFF, 0) | |
e0001a05 NC |
1733 | || !add_dynamic_entry (DT_XTENSA_GOT_LOC_SZ, 0)) |
1734 | return FALSE; | |
1735 | } | |
1736 | #undef add_dynamic_entry | |
1737 | ||
1738 | return TRUE; | |
1739 | } | |
1740 | ||
28dbbc02 BW |
1741 | static bfd_boolean |
1742 | elf_xtensa_always_size_sections (bfd *output_bfd, | |
1743 | struct bfd_link_info *info) | |
1744 | { | |
1745 | struct elf_xtensa_link_hash_table *htab; | |
1746 | asection *tls_sec; | |
1747 | ||
1748 | htab = elf_xtensa_hash_table (info); | |
4dfe6ac6 NC |
1749 | if (htab == NULL) |
1750 | return FALSE; | |
1751 | ||
28dbbc02 BW |
1752 | tls_sec = htab->elf.tls_sec; |
1753 | ||
1754 | if (tls_sec && (htab->tlsbase->tls_type & GOT_TLS_ANY) != 0) | |
1755 | { | |
1756 | struct elf_link_hash_entry *tlsbase = &htab->tlsbase->elf; | |
1757 | struct bfd_link_hash_entry *bh = &tlsbase->root; | |
1758 | const struct elf_backend_data *bed = get_elf_backend_data (output_bfd); | |
1759 | ||
1760 | tlsbase->type = STT_TLS; | |
1761 | if (!(_bfd_generic_link_add_one_symbol | |
1762 | (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL, | |
1763 | tls_sec, 0, NULL, FALSE, | |
1764 | bed->collect, &bh))) | |
1765 | return FALSE; | |
1766 | tlsbase->def_regular = 1; | |
1767 | tlsbase->other = STV_HIDDEN; | |
1768 | (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE); | |
1769 | } | |
1770 | ||
1771 | return TRUE; | |
1772 | } | |
1773 | ||
e0001a05 | 1774 | \f |
28dbbc02 BW |
1775 | /* Return the base VMA address which should be subtracted from real addresses |
1776 | when resolving @dtpoff relocation. | |
1777 | This is PT_TLS segment p_vaddr. */ | |
1778 | ||
1779 | static bfd_vma | |
1780 | dtpoff_base (struct bfd_link_info *info) | |
1781 | { | |
1782 | /* If tls_sec is NULL, we should have signalled an error already. */ | |
1783 | if (elf_hash_table (info)->tls_sec == NULL) | |
1784 | return 0; | |
1785 | return elf_hash_table (info)->tls_sec->vma; | |
1786 | } | |
1787 | ||
1788 | /* Return the relocation value for @tpoff relocation | |
1789 | if STT_TLS virtual address is ADDRESS. */ | |
1790 | ||
1791 | static bfd_vma | |
1792 | tpoff (struct bfd_link_info *info, bfd_vma address) | |
1793 | { | |
1794 | struct elf_link_hash_table *htab = elf_hash_table (info); | |
1795 | bfd_vma base; | |
1796 | ||
1797 | /* If tls_sec is NULL, we should have signalled an error already. */ | |
1798 | if (htab->tls_sec == NULL) | |
1799 | return 0; | |
1800 | base = align_power ((bfd_vma) TCB_SIZE, htab->tls_sec->alignment_power); | |
1801 | return address - htab->tls_sec->vma + base; | |
1802 | } | |
1803 | ||
e0001a05 NC |
1804 | /* Perform the specified relocation. The instruction at (contents + address) |
1805 | is modified to set one operand to represent the value in "relocation". The | |
1806 | operand position is determined by the relocation type recorded in the | |
1807 | howto. */ | |
1808 | ||
1809 | #define CALL_SEGMENT_BITS (30) | |
7fa3d080 | 1810 | #define CALL_SEGMENT_SIZE (1 << CALL_SEGMENT_BITS) |
e0001a05 NC |
1811 | |
1812 | static bfd_reloc_status_type | |
7fa3d080 BW |
1813 | elf_xtensa_do_reloc (reloc_howto_type *howto, |
1814 | bfd *abfd, | |
1815 | asection *input_section, | |
1816 | bfd_vma relocation, | |
1817 | bfd_byte *contents, | |
1818 | bfd_vma address, | |
1819 | bfd_boolean is_weak_undef, | |
1820 | char **error_message) | |
e0001a05 | 1821 | { |
43cd72b9 | 1822 | xtensa_format fmt; |
e0001a05 | 1823 | xtensa_opcode opcode; |
e0001a05 | 1824 | xtensa_isa isa = xtensa_default_isa; |
43cd72b9 BW |
1825 | static xtensa_insnbuf ibuff = NULL; |
1826 | static xtensa_insnbuf sbuff = NULL; | |
1bbb5f21 | 1827 | bfd_vma self_address; |
43cd72b9 BW |
1828 | bfd_size_type input_size; |
1829 | int opnd, slot; | |
e0001a05 NC |
1830 | uint32 newval; |
1831 | ||
43cd72b9 BW |
1832 | if (!ibuff) |
1833 | { | |
1834 | ibuff = xtensa_insnbuf_alloc (isa); | |
1835 | sbuff = xtensa_insnbuf_alloc (isa); | |
1836 | } | |
1837 | ||
1838 | input_size = bfd_get_section_limit (abfd, input_section); | |
1839 | ||
1bbb5f21 BW |
1840 | /* Calculate the PC address for this instruction. */ |
1841 | self_address = (input_section->output_section->vma | |
1842 | + input_section->output_offset | |
1843 | + address); | |
1844 | ||
e0001a05 NC |
1845 | switch (howto->type) |
1846 | { | |
1847 | case R_XTENSA_NONE: | |
43cd72b9 BW |
1848 | case R_XTENSA_DIFF8: |
1849 | case R_XTENSA_DIFF16: | |
1850 | case R_XTENSA_DIFF32: | |
28dbbc02 BW |
1851 | case R_XTENSA_TLS_FUNC: |
1852 | case R_XTENSA_TLS_ARG: | |
1853 | case R_XTENSA_TLS_CALL: | |
e0001a05 NC |
1854 | return bfd_reloc_ok; |
1855 | ||
1856 | case R_XTENSA_ASM_EXPAND: | |
1857 | if (!is_weak_undef) | |
1858 | { | |
1859 | /* Check for windowed CALL across a 1GB boundary. */ | |
91d6fa6a NC |
1860 | opcode = get_expanded_call_opcode (contents + address, |
1861 | input_size - address, 0); | |
e0001a05 NC |
1862 | if (is_windowed_call_opcode (opcode)) |
1863 | { | |
43cd72b9 | 1864 | if ((self_address >> CALL_SEGMENT_BITS) |
68ffbac6 | 1865 | != (relocation >> CALL_SEGMENT_BITS)) |
e0001a05 NC |
1866 | { |
1867 | *error_message = "windowed longcall crosses 1GB boundary; " | |
1868 | "return may fail"; | |
1869 | return bfd_reloc_dangerous; | |
1870 | } | |
1871 | } | |
1872 | } | |
1873 | return bfd_reloc_ok; | |
1874 | ||
1875 | case R_XTENSA_ASM_SIMPLIFY: | |
43cd72b9 | 1876 | { |
07d6d2b8 | 1877 | /* Convert the L32R/CALLX to CALL. */ |
43cd72b9 BW |
1878 | bfd_reloc_status_type retval = |
1879 | elf_xtensa_do_asm_simplify (contents, address, input_size, | |
1880 | error_message); | |
e0001a05 | 1881 | if (retval != bfd_reloc_ok) |
43cd72b9 | 1882 | return bfd_reloc_dangerous; |
e0001a05 NC |
1883 | |
1884 | /* The CALL needs to be relocated. Continue below for that part. */ | |
1885 | address += 3; | |
c46082c8 | 1886 | self_address += 3; |
43cd72b9 | 1887 | howto = &elf_howto_table[(unsigned) R_XTENSA_SLOT0_OP ]; |
e0001a05 NC |
1888 | } |
1889 | break; | |
1890 | ||
1891 | case R_XTENSA_32: | |
e0001a05 NC |
1892 | { |
1893 | bfd_vma x; | |
1894 | x = bfd_get_32 (abfd, contents + address); | |
1895 | x = x + relocation; | |
1896 | bfd_put_32 (abfd, x, contents + address); | |
1897 | } | |
1898 | return bfd_reloc_ok; | |
1bbb5f21 BW |
1899 | |
1900 | case R_XTENSA_32_PCREL: | |
1901 | bfd_put_32 (abfd, relocation - self_address, contents + address); | |
1902 | return bfd_reloc_ok; | |
28dbbc02 BW |
1903 | |
1904 | case R_XTENSA_PLT: | |
1905 | case R_XTENSA_TLSDESC_FN: | |
1906 | case R_XTENSA_TLSDESC_ARG: | |
1907 | case R_XTENSA_TLS_DTPOFF: | |
1908 | case R_XTENSA_TLS_TPOFF: | |
1909 | bfd_put_32 (abfd, relocation, contents + address); | |
1910 | return bfd_reloc_ok; | |
e0001a05 NC |
1911 | } |
1912 | ||
43cd72b9 BW |
1913 | /* Only instruction slot-specific relocations handled below.... */ |
1914 | slot = get_relocation_slot (howto->type); | |
1915 | if (slot == XTENSA_UNDEFINED) | |
e0001a05 | 1916 | { |
43cd72b9 | 1917 | *error_message = "unexpected relocation"; |
e0001a05 NC |
1918 | return bfd_reloc_dangerous; |
1919 | } | |
1920 | ||
43cd72b9 BW |
1921 | /* Read the instruction into a buffer and decode the opcode. */ |
1922 | xtensa_insnbuf_from_chars (isa, ibuff, contents + address, | |
1923 | input_size - address); | |
1924 | fmt = xtensa_format_decode (isa, ibuff); | |
1925 | if (fmt == XTENSA_UNDEFINED) | |
e0001a05 | 1926 | { |
43cd72b9 | 1927 | *error_message = "cannot decode instruction format"; |
e0001a05 NC |
1928 | return bfd_reloc_dangerous; |
1929 | } | |
1930 | ||
43cd72b9 | 1931 | xtensa_format_get_slot (isa, fmt, slot, ibuff, sbuff); |
e0001a05 | 1932 | |
43cd72b9 BW |
1933 | opcode = xtensa_opcode_decode (isa, fmt, slot, sbuff); |
1934 | if (opcode == XTENSA_UNDEFINED) | |
e0001a05 | 1935 | { |
43cd72b9 | 1936 | *error_message = "cannot decode instruction opcode"; |
e0001a05 NC |
1937 | return bfd_reloc_dangerous; |
1938 | } | |
1939 | ||
43cd72b9 BW |
1940 | /* Check for opcode-specific "alternate" relocations. */ |
1941 | if (is_alt_relocation (howto->type)) | |
1942 | { | |
1943 | if (opcode == get_l32r_opcode ()) | |
1944 | { | |
1945 | /* Handle the special-case of non-PC-relative L32R instructions. */ | |
1946 | bfd *output_bfd = input_section->output_section->owner; | |
1947 | asection *lit4_sec = bfd_get_section_by_name (output_bfd, ".lit4"); | |
1948 | if (!lit4_sec) | |
1949 | { | |
1950 | *error_message = "relocation references missing .lit4 section"; | |
1951 | return bfd_reloc_dangerous; | |
1952 | } | |
1953 | self_address = ((lit4_sec->vma & ~0xfff) | |
1954 | + 0x40000 - 3); /* -3 to compensate for do_reloc */ | |
1955 | newval = relocation; | |
1956 | opnd = 1; | |
1957 | } | |
1958 | else if (opcode == get_const16_opcode ()) | |
1959 | { | |
00863b8e MF |
1960 | /* ALT used for high 16 bits. |
1961 | Ignore 32-bit overflow. */ | |
1962 | newval = (relocation >> 16) & 0xffff; | |
43cd72b9 BW |
1963 | opnd = 1; |
1964 | } | |
1965 | else | |
1966 | { | |
1967 | /* No other "alternate" relocations currently defined. */ | |
1968 | *error_message = "unexpected relocation"; | |
1969 | return bfd_reloc_dangerous; | |
1970 | } | |
1971 | } | |
1972 | else /* Not an "alternate" relocation.... */ | |
1973 | { | |
1974 | if (opcode == get_const16_opcode ()) | |
1975 | { | |
1976 | newval = relocation & 0xffff; | |
1977 | opnd = 1; | |
1978 | } | |
1979 | else | |
1980 | { | |
1981 | /* ...normal PC-relative relocation.... */ | |
1982 | ||
1983 | /* Determine which operand is being relocated. */ | |
1984 | opnd = get_relocation_opnd (opcode, howto->type); | |
1985 | if (opnd == XTENSA_UNDEFINED) | |
1986 | { | |
1987 | *error_message = "unexpected relocation"; | |
1988 | return bfd_reloc_dangerous; | |
1989 | } | |
1990 | ||
1991 | if (!howto->pc_relative) | |
1992 | { | |
1993 | *error_message = "expected PC-relative relocation"; | |
1994 | return bfd_reloc_dangerous; | |
1995 | } | |
e0001a05 | 1996 | |
43cd72b9 BW |
1997 | newval = relocation; |
1998 | } | |
1999 | } | |
e0001a05 | 2000 | |
43cd72b9 BW |
2001 | /* Apply the relocation. */ |
2002 | if (xtensa_operand_do_reloc (isa, opcode, opnd, &newval, self_address) | |
2003 | || xtensa_operand_encode (isa, opcode, opnd, &newval) | |
2004 | || xtensa_operand_set_field (isa, opcode, opnd, fmt, slot, | |
2005 | sbuff, newval)) | |
e0001a05 | 2006 | { |
2db662be BW |
2007 | const char *opname = xtensa_opcode_name (isa, opcode); |
2008 | const char *msg; | |
2009 | ||
2010 | msg = "cannot encode"; | |
2011 | if (is_direct_call_opcode (opcode)) | |
2012 | { | |
2013 | if ((relocation & 0x3) != 0) | |
2014 | msg = "misaligned call target"; | |
2015 | else | |
2016 | msg = "call target out of range"; | |
2017 | } | |
2018 | else if (opcode == get_l32r_opcode ()) | |
2019 | { | |
2020 | if ((relocation & 0x3) != 0) | |
2021 | msg = "misaligned literal target"; | |
2022 | else if (is_alt_relocation (howto->type)) | |
2023 | msg = "literal target out of range (too many literals)"; | |
2024 | else if (self_address > relocation) | |
2025 | msg = "literal target out of range (try using text-section-literals)"; | |
2026 | else | |
2027 | msg = "literal placed after use"; | |
2028 | } | |
2029 | ||
2030 | *error_message = vsprint_msg (opname, ": %s", strlen (msg) + 2, msg); | |
e0001a05 NC |
2031 | return bfd_reloc_dangerous; |
2032 | } | |
2033 | ||
43cd72b9 | 2034 | /* Check for calls across 1GB boundaries. */ |
e0001a05 NC |
2035 | if (is_direct_call_opcode (opcode) |
2036 | && is_windowed_call_opcode (opcode)) | |
2037 | { | |
43cd72b9 | 2038 | if ((self_address >> CALL_SEGMENT_BITS) |
68ffbac6 | 2039 | != (relocation >> CALL_SEGMENT_BITS)) |
e0001a05 | 2040 | { |
43cd72b9 BW |
2041 | *error_message = |
2042 | "windowed call crosses 1GB boundary; return may fail"; | |
e0001a05 NC |
2043 | return bfd_reloc_dangerous; |
2044 | } | |
2045 | } | |
2046 | ||
43cd72b9 BW |
2047 | /* Write the modified instruction back out of the buffer. */ |
2048 | xtensa_format_set_slot (isa, fmt, slot, ibuff, sbuff); | |
2049 | xtensa_insnbuf_to_chars (isa, ibuff, contents + address, | |
2050 | input_size - address); | |
e0001a05 NC |
2051 | return bfd_reloc_ok; |
2052 | } | |
2053 | ||
2054 | ||
2db662be | 2055 | static char * |
7fa3d080 | 2056 | vsprint_msg (const char *origmsg, const char *fmt, int arglen, ...) |
e0001a05 NC |
2057 | { |
2058 | /* To reduce the size of the memory leak, | |
2059 | we only use a single message buffer. */ | |
2060 | static bfd_size_type alloc_size = 0; | |
2061 | static char *message = NULL; | |
2062 | bfd_size_type orig_len, len = 0; | |
2063 | bfd_boolean is_append; | |
1651e569 | 2064 | va_list ap; |
e0001a05 | 2065 | |
1651e569 | 2066 | va_start (ap, arglen); |
68ffbac6 L |
2067 | |
2068 | is_append = (origmsg == message); | |
e0001a05 NC |
2069 | |
2070 | orig_len = strlen (origmsg); | |
2071 | len = orig_len + strlen (fmt) + arglen + 20; | |
2072 | if (len > alloc_size) | |
2073 | { | |
515ef31d | 2074 | message = (char *) bfd_realloc_or_free (message, len); |
e0001a05 NC |
2075 | alloc_size = len; |
2076 | } | |
515ef31d NC |
2077 | if (message != NULL) |
2078 | { | |
2079 | if (!is_append) | |
2080 | memcpy (message, origmsg, orig_len); | |
2081 | vsprintf (message + orig_len, fmt, ap); | |
2082 | } | |
1651e569 | 2083 | va_end (ap); |
e0001a05 NC |
2084 | return message; |
2085 | } | |
2086 | ||
2087 | ||
e0001a05 NC |
2088 | /* This function is registered as the "special_function" in the |
2089 | Xtensa howto for handling simplify operations. | |
2090 | bfd_perform_relocation / bfd_install_relocation use it to | |
2091 | perform (install) the specified relocation. Since this replaces the code | |
2092 | in bfd_perform_relocation, it is basically an Xtensa-specific, | |
2093 | stripped-down version of bfd_perform_relocation. */ | |
2094 | ||
2095 | static bfd_reloc_status_type | |
7fa3d080 BW |
2096 | bfd_elf_xtensa_reloc (bfd *abfd, |
2097 | arelent *reloc_entry, | |
2098 | asymbol *symbol, | |
2099 | void *data, | |
2100 | asection *input_section, | |
2101 | bfd *output_bfd, | |
2102 | char **error_message) | |
e0001a05 NC |
2103 | { |
2104 | bfd_vma relocation; | |
2105 | bfd_reloc_status_type flag; | |
2106 | bfd_size_type octets = reloc_entry->address * bfd_octets_per_byte (abfd); | |
2107 | bfd_vma output_base = 0; | |
2108 | reloc_howto_type *howto = reloc_entry->howto; | |
2109 | asection *reloc_target_output_section; | |
2110 | bfd_boolean is_weak_undef; | |
2111 | ||
dd1a320b BW |
2112 | if (!xtensa_default_isa) |
2113 | xtensa_default_isa = xtensa_isa_init (0, 0); | |
2114 | ||
1049f94e | 2115 | /* ELF relocs are against symbols. If we are producing relocatable |
e0001a05 NC |
2116 | output, and the reloc is against an external symbol, the resulting |
2117 | reloc will also be against the same symbol. In such a case, we | |
2118 | don't want to change anything about the way the reloc is handled, | |
2119 | since it will all be done at final link time. This test is similar | |
2120 | to what bfd_elf_generic_reloc does except that it lets relocs with | |
2121 | howto->partial_inplace go through even if the addend is non-zero. | |
2122 | (The real problem is that partial_inplace is set for XTENSA_32 | |
2123 | relocs to begin with, but that's a long story and there's little we | |
2124 | can do about it now....) */ | |
2125 | ||
7fa3d080 | 2126 | if (output_bfd && (symbol->flags & BSF_SECTION_SYM) == 0) |
e0001a05 NC |
2127 | { |
2128 | reloc_entry->address += input_section->output_offset; | |
2129 | return bfd_reloc_ok; | |
2130 | } | |
2131 | ||
2132 | /* Is the address of the relocation really within the section? */ | |
07515404 | 2133 | if (reloc_entry->address > bfd_get_section_limit (abfd, input_section)) |
e0001a05 NC |
2134 | return bfd_reloc_outofrange; |
2135 | ||
4cc11e76 | 2136 | /* Work out which section the relocation is targeted at and the |
e0001a05 NC |
2137 | initial relocation command value. */ |
2138 | ||
2139 | /* Get symbol value. (Common symbols are special.) */ | |
2140 | if (bfd_is_com_section (symbol->section)) | |
2141 | relocation = 0; | |
2142 | else | |
2143 | relocation = symbol->value; | |
2144 | ||
2145 | reloc_target_output_section = symbol->section->output_section; | |
2146 | ||
2147 | /* Convert input-section-relative symbol value to absolute. */ | |
2148 | if ((output_bfd && !howto->partial_inplace) | |
2149 | || reloc_target_output_section == NULL) | |
2150 | output_base = 0; | |
2151 | else | |
2152 | output_base = reloc_target_output_section->vma; | |
2153 | ||
2154 | relocation += output_base + symbol->section->output_offset; | |
2155 | ||
2156 | /* Add in supplied addend. */ | |
2157 | relocation += reloc_entry->addend; | |
2158 | ||
2159 | /* Here the variable relocation holds the final address of the | |
2160 | symbol we are relocating against, plus any addend. */ | |
2161 | if (output_bfd) | |
2162 | { | |
2163 | if (!howto->partial_inplace) | |
2164 | { | |
2165 | /* This is a partial relocation, and we want to apply the relocation | |
2166 | to the reloc entry rather than the raw data. Everything except | |
2167 | relocations against section symbols has already been handled | |
2168 | above. */ | |
43cd72b9 | 2169 | |
e0001a05 NC |
2170 | BFD_ASSERT (symbol->flags & BSF_SECTION_SYM); |
2171 | reloc_entry->addend = relocation; | |
2172 | reloc_entry->address += input_section->output_offset; | |
2173 | return bfd_reloc_ok; | |
2174 | } | |
2175 | else | |
2176 | { | |
2177 | reloc_entry->address += input_section->output_offset; | |
2178 | reloc_entry->addend = 0; | |
2179 | } | |
2180 | } | |
2181 | ||
2182 | is_weak_undef = (bfd_is_und_section (symbol->section) | |
2183 | && (symbol->flags & BSF_WEAK) != 0); | |
2184 | flag = elf_xtensa_do_reloc (howto, abfd, input_section, relocation, | |
2185 | (bfd_byte *) data, (bfd_vma) octets, | |
2186 | is_weak_undef, error_message); | |
2187 | ||
2188 | if (flag == bfd_reloc_dangerous) | |
2189 | { | |
2190 | /* Add the symbol name to the error message. */ | |
2191 | if (! *error_message) | |
2192 | *error_message = ""; | |
2193 | *error_message = vsprint_msg (*error_message, ": (%s + 0x%lx)", | |
2194 | strlen (symbol->name) + 17, | |
70961b9d AM |
2195 | symbol->name, |
2196 | (unsigned long) reloc_entry->addend); | |
e0001a05 NC |
2197 | } |
2198 | ||
2199 | return flag; | |
2200 | } | |
2201 | ||
2202 | ||
2203 | /* Set up an entry in the procedure linkage table. */ | |
2204 | ||
2205 | static bfd_vma | |
f0e6fdb2 | 2206 | elf_xtensa_create_plt_entry (struct bfd_link_info *info, |
7fa3d080 BW |
2207 | bfd *output_bfd, |
2208 | unsigned reloc_index) | |
e0001a05 NC |
2209 | { |
2210 | asection *splt, *sgotplt; | |
2211 | bfd_vma plt_base, got_base; | |
92b3f008 | 2212 | bfd_vma code_offset, lit_offset, abi_offset; |
e0001a05 NC |
2213 | int chunk; |
2214 | ||
2215 | chunk = reloc_index / PLT_ENTRIES_PER_CHUNK; | |
f0e6fdb2 BW |
2216 | splt = elf_xtensa_get_plt_section (info, chunk); |
2217 | sgotplt = elf_xtensa_get_gotplt_section (info, chunk); | |
e0001a05 NC |
2218 | BFD_ASSERT (splt != NULL && sgotplt != NULL); |
2219 | ||
2220 | plt_base = splt->output_section->vma + splt->output_offset; | |
2221 | got_base = sgotplt->output_section->vma + sgotplt->output_offset; | |
2222 | ||
2223 | lit_offset = 8 + (reloc_index % PLT_ENTRIES_PER_CHUNK) * 4; | |
2224 | code_offset = (reloc_index % PLT_ENTRIES_PER_CHUNK) * PLT_ENTRY_SIZE; | |
2225 | ||
2226 | /* Fill in the literal entry. This is the offset of the dynamic | |
2227 | relocation entry. */ | |
2228 | bfd_put_32 (output_bfd, reloc_index * sizeof (Elf32_External_Rela), | |
2229 | sgotplt->contents + lit_offset); | |
2230 | ||
2231 | /* Fill in the entry in the procedure linkage table. */ | |
2232 | memcpy (splt->contents + code_offset, | |
2233 | (bfd_big_endian (output_bfd) | |
f7e16c2a MF |
2234 | ? elf_xtensa_be_plt_entry[XSHAL_ABI != XTHAL_ABI_WINDOWED] |
2235 | : elf_xtensa_le_plt_entry[XSHAL_ABI != XTHAL_ABI_WINDOWED]), | |
e0001a05 | 2236 | PLT_ENTRY_SIZE); |
92b3f008 | 2237 | abi_offset = XSHAL_ABI == XTHAL_ABI_WINDOWED ? 3 : 0; |
e0001a05 | 2238 | bfd_put_16 (output_bfd, l32r_offset (got_base + 0, |
92b3f008 MF |
2239 | plt_base + code_offset + abi_offset), |
2240 | splt->contents + code_offset + abi_offset + 1); | |
e0001a05 | 2241 | bfd_put_16 (output_bfd, l32r_offset (got_base + 4, |
92b3f008 MF |
2242 | plt_base + code_offset + abi_offset + 3), |
2243 | splt->contents + code_offset + abi_offset + 4); | |
e0001a05 | 2244 | bfd_put_16 (output_bfd, l32r_offset (got_base + lit_offset, |
92b3f008 MF |
2245 | plt_base + code_offset + abi_offset + 6), |
2246 | splt->contents + code_offset + abi_offset + 7); | |
e0001a05 NC |
2247 | |
2248 | return plt_base + code_offset; | |
2249 | } | |
2250 | ||
2251 | ||
28dbbc02 BW |
2252 | static bfd_boolean get_indirect_call_dest_reg (xtensa_opcode, unsigned *); |
2253 | ||
2254 | static bfd_boolean | |
2255 | replace_tls_insn (Elf_Internal_Rela *rel, | |
2256 | bfd *abfd, | |
2257 | asection *input_section, | |
2258 | bfd_byte *contents, | |
2259 | bfd_boolean is_ld_model, | |
2260 | char **error_message) | |
2261 | { | |
2262 | static xtensa_insnbuf ibuff = NULL; | |
2263 | static xtensa_insnbuf sbuff = NULL; | |
2264 | xtensa_isa isa = xtensa_default_isa; | |
2265 | xtensa_format fmt; | |
2266 | xtensa_opcode old_op, new_op; | |
2267 | bfd_size_type input_size; | |
2268 | int r_type; | |
2269 | unsigned dest_reg, src_reg; | |
2270 | ||
2271 | if (ibuff == NULL) | |
2272 | { | |
2273 | ibuff = xtensa_insnbuf_alloc (isa); | |
2274 | sbuff = xtensa_insnbuf_alloc (isa); | |
2275 | } | |
2276 | ||
2277 | input_size = bfd_get_section_limit (abfd, input_section); | |
2278 | ||
2279 | /* Read the instruction into a buffer and decode the opcode. */ | |
2280 | xtensa_insnbuf_from_chars (isa, ibuff, contents + rel->r_offset, | |
2281 | input_size - rel->r_offset); | |
2282 | fmt = xtensa_format_decode (isa, ibuff); | |
2283 | if (fmt == XTENSA_UNDEFINED) | |
2284 | { | |
2285 | *error_message = "cannot decode instruction format"; | |
2286 | return FALSE; | |
2287 | } | |
2288 | ||
2289 | BFD_ASSERT (xtensa_format_num_slots (isa, fmt) == 1); | |
2290 | xtensa_format_get_slot (isa, fmt, 0, ibuff, sbuff); | |
2291 | ||
2292 | old_op = xtensa_opcode_decode (isa, fmt, 0, sbuff); | |
2293 | if (old_op == XTENSA_UNDEFINED) | |
2294 | { | |
2295 | *error_message = "cannot decode instruction opcode"; | |
2296 | return FALSE; | |
2297 | } | |
2298 | ||
2299 | r_type = ELF32_R_TYPE (rel->r_info); | |
2300 | switch (r_type) | |
2301 | { | |
2302 | case R_XTENSA_TLS_FUNC: | |
2303 | case R_XTENSA_TLS_ARG: | |
2304 | if (old_op != get_l32r_opcode () | |
2305 | || xtensa_operand_get_field (isa, old_op, 0, fmt, 0, | |
2306 | sbuff, &dest_reg) != 0) | |
2307 | { | |
2308 | *error_message = "cannot extract L32R destination for TLS access"; | |
2309 | return FALSE; | |
2310 | } | |
2311 | break; | |
2312 | ||
2313 | case R_XTENSA_TLS_CALL: | |
2314 | if (! get_indirect_call_dest_reg (old_op, &dest_reg) | |
2315 | || xtensa_operand_get_field (isa, old_op, 0, fmt, 0, | |
2316 | sbuff, &src_reg) != 0) | |
2317 | { | |
2318 | *error_message = "cannot extract CALLXn operands for TLS access"; | |
2319 | return FALSE; | |
2320 | } | |
2321 | break; | |
2322 | ||
2323 | default: | |
2324 | abort (); | |
2325 | } | |
2326 | ||
2327 | if (is_ld_model) | |
2328 | { | |
2329 | switch (r_type) | |
2330 | { | |
2331 | case R_XTENSA_TLS_FUNC: | |
2332 | case R_XTENSA_TLS_ARG: | |
2333 | /* Change the instruction to a NOP (or "OR a1, a1, a1" for older | |
2334 | versions of Xtensa). */ | |
2335 | new_op = xtensa_opcode_lookup (isa, "nop"); | |
2336 | if (new_op == XTENSA_UNDEFINED) | |
2337 | { | |
2338 | new_op = xtensa_opcode_lookup (isa, "or"); | |
2339 | if (new_op == XTENSA_UNDEFINED | |
2340 | || xtensa_opcode_encode (isa, fmt, 0, sbuff, new_op) != 0 | |
2341 | || xtensa_operand_set_field (isa, new_op, 0, fmt, 0, | |
2342 | sbuff, 1) != 0 | |
2343 | || xtensa_operand_set_field (isa, new_op, 1, fmt, 0, | |
2344 | sbuff, 1) != 0 | |
2345 | || xtensa_operand_set_field (isa, new_op, 2, fmt, 0, | |
2346 | sbuff, 1) != 0) | |
2347 | { | |
2348 | *error_message = "cannot encode OR for TLS access"; | |
2349 | return FALSE; | |
2350 | } | |
2351 | } | |
2352 | else | |
2353 | { | |
2354 | if (xtensa_opcode_encode (isa, fmt, 0, sbuff, new_op) != 0) | |
2355 | { | |
2356 | *error_message = "cannot encode NOP for TLS access"; | |
2357 | return FALSE; | |
2358 | } | |
2359 | } | |
2360 | break; | |
2361 | ||
2362 | case R_XTENSA_TLS_CALL: | |
2363 | /* Read THREADPTR into the CALLX's return value register. */ | |
2364 | new_op = xtensa_opcode_lookup (isa, "rur.threadptr"); | |
2365 | if (new_op == XTENSA_UNDEFINED | |
2366 | || xtensa_opcode_encode (isa, fmt, 0, sbuff, new_op) != 0 | |
2367 | || xtensa_operand_set_field (isa, new_op, 0, fmt, 0, | |
2368 | sbuff, dest_reg + 2) != 0) | |
2369 | { | |
2370 | *error_message = "cannot encode RUR.THREADPTR for TLS access"; | |
2371 | return FALSE; | |
2372 | } | |
2373 | break; | |
2374 | } | |
2375 | } | |
2376 | else | |
2377 | { | |
2378 | switch (r_type) | |
2379 | { | |
2380 | case R_XTENSA_TLS_FUNC: | |
2381 | new_op = xtensa_opcode_lookup (isa, "rur.threadptr"); | |
2382 | if (new_op == XTENSA_UNDEFINED | |
2383 | || xtensa_opcode_encode (isa, fmt, 0, sbuff, new_op) != 0 | |
2384 | || xtensa_operand_set_field (isa, new_op, 0, fmt, 0, | |
2385 | sbuff, dest_reg) != 0) | |
2386 | { | |
2387 | *error_message = "cannot encode RUR.THREADPTR for TLS access"; | |
2388 | return FALSE; | |
2389 | } | |
2390 | break; | |
2391 | ||
2392 | case R_XTENSA_TLS_ARG: | |
2393 | /* Nothing to do. Keep the original L32R instruction. */ | |
2394 | return TRUE; | |
2395 | ||
2396 | case R_XTENSA_TLS_CALL: | |
2397 | /* Add the CALLX's src register (holding the THREADPTR value) | |
2398 | to the first argument register (holding the offset) and put | |
2399 | the result in the CALLX's return value register. */ | |
2400 | new_op = xtensa_opcode_lookup (isa, "add"); | |
2401 | if (new_op == XTENSA_UNDEFINED | |
2402 | || xtensa_opcode_encode (isa, fmt, 0, sbuff, new_op) != 0 | |
2403 | || xtensa_operand_set_field (isa, new_op, 0, fmt, 0, | |
2404 | sbuff, dest_reg + 2) != 0 | |
2405 | || xtensa_operand_set_field (isa, new_op, 1, fmt, 0, | |
2406 | sbuff, dest_reg + 2) != 0 | |
2407 | || xtensa_operand_set_field (isa, new_op, 2, fmt, 0, | |
2408 | sbuff, src_reg) != 0) | |
2409 | { | |
2410 | *error_message = "cannot encode ADD for TLS access"; | |
2411 | return FALSE; | |
2412 | } | |
2413 | break; | |
2414 | } | |
2415 | } | |
2416 | ||
2417 | xtensa_format_set_slot (isa, fmt, 0, ibuff, sbuff); | |
2418 | xtensa_insnbuf_to_chars (isa, ibuff, contents + rel->r_offset, | |
07d6d2b8 | 2419 | input_size - rel->r_offset); |
28dbbc02 BW |
2420 | |
2421 | return TRUE; | |
2422 | } | |
2423 | ||
2424 | ||
2425 | #define IS_XTENSA_TLS_RELOC(R_TYPE) \ | |
2426 | ((R_TYPE) == R_XTENSA_TLSDESC_FN \ | |
2427 | || (R_TYPE) == R_XTENSA_TLSDESC_ARG \ | |
2428 | || (R_TYPE) == R_XTENSA_TLS_DTPOFF \ | |
2429 | || (R_TYPE) == R_XTENSA_TLS_TPOFF \ | |
2430 | || (R_TYPE) == R_XTENSA_TLS_FUNC \ | |
2431 | || (R_TYPE) == R_XTENSA_TLS_ARG \ | |
2432 | || (R_TYPE) == R_XTENSA_TLS_CALL) | |
2433 | ||
e0001a05 | 2434 | /* Relocate an Xtensa ELF section. This is invoked by the linker for |
1049f94e | 2435 | both relocatable and final links. */ |
e0001a05 NC |
2436 | |
2437 | static bfd_boolean | |
7fa3d080 BW |
2438 | elf_xtensa_relocate_section (bfd *output_bfd, |
2439 | struct bfd_link_info *info, | |
2440 | bfd *input_bfd, | |
2441 | asection *input_section, | |
2442 | bfd_byte *contents, | |
2443 | Elf_Internal_Rela *relocs, | |
2444 | Elf_Internal_Sym *local_syms, | |
2445 | asection **local_sections) | |
e0001a05 | 2446 | { |
f0e6fdb2 | 2447 | struct elf_xtensa_link_hash_table *htab; |
e0001a05 NC |
2448 | Elf_Internal_Shdr *symtab_hdr; |
2449 | Elf_Internal_Rela *rel; | |
2450 | Elf_Internal_Rela *relend; | |
2451 | struct elf_link_hash_entry **sym_hashes; | |
88d65ad6 BW |
2452 | property_table_entry *lit_table = 0; |
2453 | int ltblsize = 0; | |
28dbbc02 | 2454 | char *local_got_tls_types; |
e0001a05 | 2455 | char *error_message = NULL; |
43cd72b9 | 2456 | bfd_size_type input_size; |
28dbbc02 | 2457 | int tls_type; |
e0001a05 | 2458 | |
43cd72b9 BW |
2459 | if (!xtensa_default_isa) |
2460 | xtensa_default_isa = xtensa_isa_init (0, 0); | |
e0001a05 | 2461 | |
28dbbc02 BW |
2462 | BFD_ASSERT (is_xtensa_elf (input_bfd)); |
2463 | ||
f0e6fdb2 | 2464 | htab = elf_xtensa_hash_table (info); |
4dfe6ac6 NC |
2465 | if (htab == NULL) |
2466 | return FALSE; | |
2467 | ||
e0001a05 NC |
2468 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
2469 | sym_hashes = elf_sym_hashes (input_bfd); | |
28dbbc02 | 2470 | local_got_tls_types = elf_xtensa_local_got_tls_type (input_bfd); |
e0001a05 | 2471 | |
88d65ad6 BW |
2472 | if (elf_hash_table (info)->dynamic_sections_created) |
2473 | { | |
2474 | ltblsize = xtensa_read_table_entries (input_bfd, input_section, | |
43cd72b9 BW |
2475 | &lit_table, XTENSA_LIT_SEC_NAME, |
2476 | TRUE); | |
88d65ad6 BW |
2477 | if (ltblsize < 0) |
2478 | return FALSE; | |
2479 | } | |
2480 | ||
43cd72b9 BW |
2481 | input_size = bfd_get_section_limit (input_bfd, input_section); |
2482 | ||
e0001a05 NC |
2483 | rel = relocs; |
2484 | relend = relocs + input_section->reloc_count; | |
2485 | for (; rel < relend; rel++) | |
2486 | { | |
2487 | int r_type; | |
2488 | reloc_howto_type *howto; | |
2489 | unsigned long r_symndx; | |
2490 | struct elf_link_hash_entry *h; | |
2491 | Elf_Internal_Sym *sym; | |
28dbbc02 BW |
2492 | char sym_type; |
2493 | const char *name; | |
e0001a05 NC |
2494 | asection *sec; |
2495 | bfd_vma relocation; | |
2496 | bfd_reloc_status_type r; | |
2497 | bfd_boolean is_weak_undef; | |
2498 | bfd_boolean unresolved_reloc; | |
9b8c98a4 | 2499 | bfd_boolean warned; |
28dbbc02 | 2500 | bfd_boolean dynamic_symbol; |
e0001a05 NC |
2501 | |
2502 | r_type = ELF32_R_TYPE (rel->r_info); | |
2503 | if (r_type == (int) R_XTENSA_GNU_VTINHERIT | |
2504 | || r_type == (int) R_XTENSA_GNU_VTENTRY) | |
2505 | continue; | |
2506 | ||
2507 | if (r_type < 0 || r_type >= (int) R_XTENSA_max) | |
2508 | { | |
2509 | bfd_set_error (bfd_error_bad_value); | |
2510 | return FALSE; | |
2511 | } | |
2512 | howto = &elf_howto_table[r_type]; | |
2513 | ||
2514 | r_symndx = ELF32_R_SYM (rel->r_info); | |
2515 | ||
ab96bf03 AM |
2516 | h = NULL; |
2517 | sym = NULL; | |
2518 | sec = NULL; | |
2519 | is_weak_undef = FALSE; | |
2520 | unresolved_reloc = FALSE; | |
2521 | warned = FALSE; | |
2522 | ||
0e1862bb | 2523 | if (howto->partial_inplace && !bfd_link_relocatable (info)) |
ab96bf03 AM |
2524 | { |
2525 | /* Because R_XTENSA_32 was made partial_inplace to fix some | |
2526 | problems with DWARF info in partial links, there may be | |
2527 | an addend stored in the contents. Take it out of there | |
2528 | and move it back into the addend field of the reloc. */ | |
2529 | rel->r_addend += bfd_get_32 (input_bfd, contents + rel->r_offset); | |
2530 | bfd_put_32 (input_bfd, 0, contents + rel->r_offset); | |
2531 | } | |
2532 | ||
2533 | if (r_symndx < symtab_hdr->sh_info) | |
2534 | { | |
2535 | sym = local_syms + r_symndx; | |
28dbbc02 | 2536 | sym_type = ELF32_ST_TYPE (sym->st_info); |
ab96bf03 AM |
2537 | sec = local_sections[r_symndx]; |
2538 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); | |
2539 | } | |
2540 | else | |
2541 | { | |
62d887d4 L |
2542 | bfd_boolean ignored; |
2543 | ||
ab96bf03 AM |
2544 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
2545 | r_symndx, symtab_hdr, sym_hashes, | |
2546 | h, sec, relocation, | |
62d887d4 | 2547 | unresolved_reloc, warned, ignored); |
ab96bf03 AM |
2548 | |
2549 | if (relocation == 0 | |
2550 | && !unresolved_reloc | |
2551 | && h->root.type == bfd_link_hash_undefweak) | |
2552 | is_weak_undef = TRUE; | |
28dbbc02 BW |
2553 | |
2554 | sym_type = h->type; | |
ab96bf03 AM |
2555 | } |
2556 | ||
dbaa2011 | 2557 | if (sec != NULL && discarded_section (sec)) |
e4067dbb | 2558 | RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, |
545fd46b | 2559 | rel, 1, relend, howto, 0, contents); |
ab96bf03 | 2560 | |
0e1862bb | 2561 | if (bfd_link_relocatable (info)) |
e0001a05 | 2562 | { |
7aa09196 SA |
2563 | bfd_vma dest_addr; |
2564 | asection * sym_sec = get_elf_r_symndx_section (input_bfd, r_symndx); | |
2565 | ||
43cd72b9 | 2566 | /* This is a relocatable link. |
e0001a05 NC |
2567 | 1) If the reloc is against a section symbol, adjust |
2568 | according to the output section. | |
2569 | 2) If there is a new target for this relocation, | |
2570 | the new target will be in the same output section. | |
2571 | We adjust the relocation by the output section | |
2572 | difference. */ | |
2573 | ||
2574 | if (relaxing_section) | |
2575 | { | |
2576 | /* Check if this references a section in another input file. */ | |
43cd72b9 BW |
2577 | if (!do_fix_for_relocatable_link (rel, input_bfd, input_section, |
2578 | contents)) | |
2579 | return FALSE; | |
e0001a05 NC |
2580 | } |
2581 | ||
7aa09196 SA |
2582 | dest_addr = sym_sec->output_section->vma + sym_sec->output_offset |
2583 | + get_elf_r_symndx_offset (input_bfd, r_symndx) + rel->r_addend; | |
2584 | ||
43cd72b9 | 2585 | if (r_type == R_XTENSA_ASM_SIMPLIFY) |
e0001a05 | 2586 | { |
91d6fa6a | 2587 | error_message = NULL; |
e0001a05 NC |
2588 | /* Convert ASM_SIMPLIFY into the simpler relocation |
2589 | so that they never escape a relaxing link. */ | |
43cd72b9 BW |
2590 | r = contract_asm_expansion (contents, input_size, rel, |
2591 | &error_message); | |
2592 | if (r != bfd_reloc_ok) | |
1a72702b AM |
2593 | (*info->callbacks->reloc_dangerous) |
2594 | (info, error_message, | |
2595 | input_bfd, input_section, rel->r_offset); | |
2596 | ||
e0001a05 NC |
2597 | r_type = ELF32_R_TYPE (rel->r_info); |
2598 | } | |
2599 | ||
1049f94e | 2600 | /* This is a relocatable link, so we don't have to change |
e0001a05 NC |
2601 | anything unless the reloc is against a section symbol, |
2602 | in which case we have to adjust according to where the | |
2603 | section symbol winds up in the output section. */ | |
2604 | if (r_symndx < symtab_hdr->sh_info) | |
2605 | { | |
2606 | sym = local_syms + r_symndx; | |
2607 | if (ELF_ST_TYPE (sym->st_info) == STT_SECTION) | |
2608 | { | |
2609 | sec = local_sections[r_symndx]; | |
2610 | rel->r_addend += sec->output_offset + sym->st_value; | |
2611 | } | |
2612 | } | |
2613 | ||
2614 | /* If there is an addend with a partial_inplace howto, | |
2615 | then move the addend to the contents. This is a hack | |
1049f94e | 2616 | to work around problems with DWARF in relocatable links |
e0001a05 NC |
2617 | with some previous version of BFD. Now we can't easily get |
2618 | rid of the hack without breaking backward compatibility.... */ | |
7aa09196 SA |
2619 | r = bfd_reloc_ok; |
2620 | howto = &elf_howto_table[r_type]; | |
2621 | if (howto->partial_inplace && rel->r_addend) | |
2622 | { | |
2623 | r = elf_xtensa_do_reloc (howto, input_bfd, input_section, | |
2624 | rel->r_addend, contents, | |
2625 | rel->r_offset, FALSE, | |
2626 | &error_message); | |
2627 | rel->r_addend = 0; | |
2628 | } | |
2629 | else | |
e0001a05 | 2630 | { |
7aa09196 SA |
2631 | /* Put the correct bits in the target instruction, even |
2632 | though the relocation will still be present in the output | |
2633 | file. This makes disassembly clearer, as well as | |
2634 | allowing loadable kernel modules to work without needing | |
2635 | relocations on anything other than calls and l32r's. */ | |
2636 | ||
2637 | /* If it is not in the same section, there is nothing we can do. */ | |
2638 | if (r_type >= R_XTENSA_SLOT0_OP && r_type <= R_XTENSA_SLOT14_OP && | |
2639 | sym_sec->output_section == input_section->output_section) | |
e0001a05 NC |
2640 | { |
2641 | r = elf_xtensa_do_reloc (howto, input_bfd, input_section, | |
7aa09196 | 2642 | dest_addr, contents, |
e0001a05 NC |
2643 | rel->r_offset, FALSE, |
2644 | &error_message); | |
e0001a05 NC |
2645 | } |
2646 | } | |
7aa09196 | 2647 | if (r != bfd_reloc_ok) |
1a72702b AM |
2648 | (*info->callbacks->reloc_dangerous) |
2649 | (info, error_message, | |
2650 | input_bfd, input_section, rel->r_offset); | |
e0001a05 | 2651 | |
1049f94e | 2652 | /* Done with work for relocatable link; continue with next reloc. */ |
e0001a05 NC |
2653 | continue; |
2654 | } | |
2655 | ||
2656 | /* This is a final link. */ | |
2657 | ||
e0001a05 NC |
2658 | if (relaxing_section) |
2659 | { | |
2660 | /* Check if this references a section in another input file. */ | |
43cd72b9 BW |
2661 | do_fix_for_final_link (rel, input_bfd, input_section, contents, |
2662 | &relocation); | |
e0001a05 NC |
2663 | } |
2664 | ||
2665 | /* Sanity check the address. */ | |
43cd72b9 | 2666 | if (rel->r_offset >= input_size |
e0001a05 NC |
2667 | && ELF32_R_TYPE (rel->r_info) != R_XTENSA_NONE) |
2668 | { | |
4eca0228 | 2669 | _bfd_error_handler |
695344c0 | 2670 | /* xgettext:c-format */ |
2dcf00ce AM |
2671 | (_("%pB(%pA+%#" PRIx64 "): " |
2672 | "relocation offset out of range (size=%#" PRIx64 ")"), | |
2673 | input_bfd, input_section, (uint64_t) rel->r_offset, | |
2674 | (uint64_t) input_size); | |
e0001a05 NC |
2675 | bfd_set_error (bfd_error_bad_value); |
2676 | return FALSE; | |
2677 | } | |
2678 | ||
28dbbc02 BW |
2679 | if (h != NULL) |
2680 | name = h->root.root.string; | |
2681 | else | |
e0001a05 | 2682 | { |
28dbbc02 BW |
2683 | name = (bfd_elf_string_from_elf_section |
2684 | (input_bfd, symtab_hdr->sh_link, sym->st_name)); | |
2685 | if (name == NULL || *name == '\0') | |
2686 | name = bfd_section_name (input_bfd, sec); | |
2687 | } | |
e0001a05 | 2688 | |
cf35638d | 2689 | if (r_symndx != STN_UNDEF |
28dbbc02 BW |
2690 | && r_type != R_XTENSA_NONE |
2691 | && (h == NULL | |
2692 | || h->root.type == bfd_link_hash_defined | |
2693 | || h->root.type == bfd_link_hash_defweak) | |
2694 | && IS_XTENSA_TLS_RELOC (r_type) != (sym_type == STT_TLS)) | |
2695 | { | |
4eca0228 | 2696 | _bfd_error_handler |
28dbbc02 | 2697 | ((sym_type == STT_TLS |
695344c0 | 2698 | /* xgettext:c-format */ |
2dcf00ce | 2699 | ? _("%pB(%pA+%#" PRIx64 "): %s used with TLS symbol %s") |
695344c0 | 2700 | /* xgettext:c-format */ |
2dcf00ce | 2701 | : _("%pB(%pA+%#" PRIx64 "): %s used with non-TLS symbol %s")), |
28dbbc02 BW |
2702 | input_bfd, |
2703 | input_section, | |
2dcf00ce | 2704 | (uint64_t) rel->r_offset, |
28dbbc02 BW |
2705 | howto->name, |
2706 | name); | |
2707 | } | |
2708 | ||
2709 | dynamic_symbol = elf_xtensa_dynamic_symbol_p (h, info); | |
2710 | ||
2711 | tls_type = GOT_UNKNOWN; | |
2712 | if (h) | |
2713 | tls_type = elf_xtensa_hash_entry (h)->tls_type; | |
2714 | else if (local_got_tls_types) | |
2715 | tls_type = local_got_tls_types [r_symndx]; | |
2716 | ||
2717 | switch (r_type) | |
2718 | { | |
2719 | case R_XTENSA_32: | |
2720 | case R_XTENSA_PLT: | |
2721 | if (elf_hash_table (info)->dynamic_sections_created | |
2722 | && (input_section->flags & SEC_ALLOC) != 0 | |
0e1862bb | 2723 | && (dynamic_symbol || bfd_link_pic (info))) |
e0001a05 NC |
2724 | { |
2725 | Elf_Internal_Rela outrel; | |
2726 | bfd_byte *loc; | |
2727 | asection *srel; | |
2728 | ||
2729 | if (dynamic_symbol && r_type == R_XTENSA_PLT) | |
ce558b89 | 2730 | srel = htab->elf.srelplt; |
e0001a05 | 2731 | else |
ce558b89 | 2732 | srel = htab->elf.srelgot; |
e0001a05 NC |
2733 | |
2734 | BFD_ASSERT (srel != NULL); | |
2735 | ||
2736 | outrel.r_offset = | |
2737 | _bfd_elf_section_offset (output_bfd, info, | |
2738 | input_section, rel->r_offset); | |
2739 | ||
2740 | if ((outrel.r_offset | 1) == (bfd_vma) -1) | |
2741 | memset (&outrel, 0, sizeof outrel); | |
2742 | else | |
2743 | { | |
f0578e28 BW |
2744 | outrel.r_offset += (input_section->output_section->vma |
2745 | + input_section->output_offset); | |
e0001a05 | 2746 | |
88d65ad6 BW |
2747 | /* Complain if the relocation is in a read-only section |
2748 | and not in a literal pool. */ | |
2749 | if ((input_section->flags & SEC_READONLY) != 0 | |
2750 | && !elf_xtensa_in_literal_pool (lit_table, ltblsize, | |
3ba3bc8c | 2751 | outrel.r_offset)) |
88d65ad6 BW |
2752 | { |
2753 | error_message = | |
2754 | _("dynamic relocation in read-only section"); | |
1a72702b AM |
2755 | (*info->callbacks->reloc_dangerous) |
2756 | (info, error_message, | |
2757 | input_bfd, input_section, rel->r_offset); | |
88d65ad6 BW |
2758 | } |
2759 | ||
e0001a05 NC |
2760 | if (dynamic_symbol) |
2761 | { | |
2762 | outrel.r_addend = rel->r_addend; | |
2763 | rel->r_addend = 0; | |
2764 | ||
2765 | if (r_type == R_XTENSA_32) | |
2766 | { | |
2767 | outrel.r_info = | |
2768 | ELF32_R_INFO (h->dynindx, R_XTENSA_GLOB_DAT); | |
2769 | relocation = 0; | |
2770 | } | |
2771 | else /* r_type == R_XTENSA_PLT */ | |
2772 | { | |
2773 | outrel.r_info = | |
2774 | ELF32_R_INFO (h->dynindx, R_XTENSA_JMP_SLOT); | |
2775 | ||
2776 | /* Create the PLT entry and set the initial | |
2777 | contents of the literal entry to the address of | |
2778 | the PLT entry. */ | |
43cd72b9 | 2779 | relocation = |
f0e6fdb2 | 2780 | elf_xtensa_create_plt_entry (info, output_bfd, |
e0001a05 NC |
2781 | srel->reloc_count); |
2782 | } | |
2783 | unresolved_reloc = FALSE; | |
2784 | } | |
c451bb34 | 2785 | else if (!is_weak_undef) |
e0001a05 NC |
2786 | { |
2787 | /* Generate a RELATIVE relocation. */ | |
2788 | outrel.r_info = ELF32_R_INFO (0, R_XTENSA_RELATIVE); | |
2789 | outrel.r_addend = 0; | |
2790 | } | |
c451bb34 MF |
2791 | else |
2792 | { | |
2793 | continue; | |
2794 | } | |
e0001a05 NC |
2795 | } |
2796 | ||
2797 | loc = (srel->contents | |
2798 | + srel->reloc_count++ * sizeof (Elf32_External_Rela)); | |
2799 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); | |
2800 | BFD_ASSERT (sizeof (Elf32_External_Rela) * srel->reloc_count | |
eea6121a | 2801 | <= srel->size); |
e0001a05 | 2802 | } |
d9ab3f29 BW |
2803 | else if (r_type == R_XTENSA_ASM_EXPAND && dynamic_symbol) |
2804 | { | |
2805 | /* This should only happen for non-PIC code, which is not | |
2806 | supposed to be used on systems with dynamic linking. | |
2807 | Just ignore these relocations. */ | |
2808 | continue; | |
2809 | } | |
28dbbc02 BW |
2810 | break; |
2811 | ||
2812 | case R_XTENSA_TLS_TPOFF: | |
2813 | /* Switch to LE model for local symbols in an executable. */ | |
0e1862bb | 2814 | if (! bfd_link_pic (info) && ! dynamic_symbol) |
28dbbc02 BW |
2815 | { |
2816 | relocation = tpoff (info, relocation); | |
2817 | break; | |
2818 | } | |
2819 | /* fall through */ | |
2820 | ||
2821 | case R_XTENSA_TLSDESC_FN: | |
2822 | case R_XTENSA_TLSDESC_ARG: | |
2823 | { | |
2824 | if (r_type == R_XTENSA_TLSDESC_FN) | |
2825 | { | |
0e1862bb | 2826 | if (! bfd_link_pic (info) || (tls_type & GOT_TLS_IE) != 0) |
28dbbc02 BW |
2827 | r_type = R_XTENSA_NONE; |
2828 | } | |
2829 | else if (r_type == R_XTENSA_TLSDESC_ARG) | |
2830 | { | |
0e1862bb | 2831 | if (bfd_link_pic (info)) |
28dbbc02 BW |
2832 | { |
2833 | if ((tls_type & GOT_TLS_IE) != 0) | |
2834 | r_type = R_XTENSA_TLS_TPOFF; | |
2835 | } | |
2836 | else | |
2837 | { | |
2838 | r_type = R_XTENSA_TLS_TPOFF; | |
2839 | if (! dynamic_symbol) | |
2840 | { | |
2841 | relocation = tpoff (info, relocation); | |
2842 | break; | |
2843 | } | |
2844 | } | |
2845 | } | |
2846 | ||
2847 | if (r_type == R_XTENSA_NONE) | |
2848 | /* Nothing to do here; skip to the next reloc. */ | |
2849 | continue; | |
2850 | ||
2851 | if (! elf_hash_table (info)->dynamic_sections_created) | |
2852 | { | |
2853 | error_message = | |
2854 | _("TLS relocation invalid without dynamic sections"); | |
1a72702b AM |
2855 | (*info->callbacks->reloc_dangerous) |
2856 | (info, error_message, | |
2857 | input_bfd, input_section, rel->r_offset); | |
28dbbc02 BW |
2858 | } |
2859 | else | |
2860 | { | |
2861 | Elf_Internal_Rela outrel; | |
2862 | bfd_byte *loc; | |
ce558b89 | 2863 | asection *srel = htab->elf.srelgot; |
28dbbc02 BW |
2864 | int indx; |
2865 | ||
2866 | outrel.r_offset = (input_section->output_section->vma | |
2867 | + input_section->output_offset | |
2868 | + rel->r_offset); | |
2869 | ||
2870 | /* Complain if the relocation is in a read-only section | |
2871 | and not in a literal pool. */ | |
2872 | if ((input_section->flags & SEC_READONLY) != 0 | |
2873 | && ! elf_xtensa_in_literal_pool (lit_table, ltblsize, | |
2874 | outrel.r_offset)) | |
2875 | { | |
2876 | error_message = | |
2877 | _("dynamic relocation in read-only section"); | |
1a72702b AM |
2878 | (*info->callbacks->reloc_dangerous) |
2879 | (info, error_message, | |
2880 | input_bfd, input_section, rel->r_offset); | |
28dbbc02 BW |
2881 | } |
2882 | ||
2883 | indx = h && h->dynindx != -1 ? h->dynindx : 0; | |
2884 | if (indx == 0) | |
2885 | outrel.r_addend = relocation - dtpoff_base (info); | |
2886 | else | |
2887 | outrel.r_addend = 0; | |
2888 | rel->r_addend = 0; | |
2889 | ||
2890 | outrel.r_info = ELF32_R_INFO (indx, r_type); | |
2891 | relocation = 0; | |
2892 | unresolved_reloc = FALSE; | |
2893 | ||
2894 | BFD_ASSERT (srel); | |
2895 | loc = (srel->contents | |
2896 | + srel->reloc_count++ * sizeof (Elf32_External_Rela)); | |
2897 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); | |
2898 | BFD_ASSERT (sizeof (Elf32_External_Rela) * srel->reloc_count | |
2899 | <= srel->size); | |
2900 | } | |
2901 | } | |
2902 | break; | |
2903 | ||
2904 | case R_XTENSA_TLS_DTPOFF: | |
0e1862bb | 2905 | if (! bfd_link_pic (info)) |
28dbbc02 BW |
2906 | /* Switch from LD model to LE model. */ |
2907 | relocation = tpoff (info, relocation); | |
2908 | else | |
2909 | relocation -= dtpoff_base (info); | |
2910 | break; | |
2911 | ||
2912 | case R_XTENSA_TLS_FUNC: | |
2913 | case R_XTENSA_TLS_ARG: | |
2914 | case R_XTENSA_TLS_CALL: | |
2915 | /* Check if optimizing to IE or LE model. */ | |
2916 | if ((tls_type & GOT_TLS_IE) != 0) | |
2917 | { | |
2918 | bfd_boolean is_ld_model = | |
2919 | (h && elf_xtensa_hash_entry (h) == htab->tlsbase); | |
2920 | if (! replace_tls_insn (rel, input_bfd, input_section, contents, | |
2921 | is_ld_model, &error_message)) | |
1a72702b AM |
2922 | (*info->callbacks->reloc_dangerous) |
2923 | (info, error_message, | |
2924 | input_bfd, input_section, rel->r_offset); | |
28dbbc02 BW |
2925 | |
2926 | if (r_type != R_XTENSA_TLS_ARG || is_ld_model) | |
2927 | { | |
2928 | /* Skip subsequent relocations on the same instruction. */ | |
2929 | while (rel + 1 < relend && rel[1].r_offset == rel->r_offset) | |
2930 | rel++; | |
2931 | } | |
2932 | } | |
2933 | continue; | |
2934 | ||
2935 | default: | |
2936 | if (elf_hash_table (info)->dynamic_sections_created | |
2937 | && dynamic_symbol && (is_operand_relocation (r_type) | |
2938 | || r_type == R_XTENSA_32_PCREL)) | |
2939 | { | |
2940 | error_message = | |
2941 | vsprint_msg ("invalid relocation for dynamic symbol", ": %s", | |
2942 | strlen (name) + 2, name); | |
1a72702b AM |
2943 | (*info->callbacks->reloc_dangerous) |
2944 | (info, error_message, input_bfd, input_section, rel->r_offset); | |
28dbbc02 BW |
2945 | continue; |
2946 | } | |
2947 | break; | |
e0001a05 NC |
2948 | } |
2949 | ||
2950 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections | |
2951 | because such sections are not SEC_ALLOC and thus ld.so will | |
2952 | not process them. */ | |
2953 | if (unresolved_reloc | |
2954 | && !((input_section->flags & SEC_DEBUGGING) != 0 | |
1d5316ab AM |
2955 | && h->def_dynamic) |
2956 | && _bfd_elf_section_offset (output_bfd, info, input_section, | |
2957 | rel->r_offset) != (bfd_vma) -1) | |
bf1747de | 2958 | { |
4eca0228 | 2959 | _bfd_error_handler |
695344c0 | 2960 | /* xgettext:c-format */ |
2dcf00ce AM |
2961 | (_("%pB(%pA+%#" PRIx64 "): " |
2962 | "unresolvable %s relocation against symbol `%s'"), | |
bf1747de BW |
2963 | input_bfd, |
2964 | input_section, | |
2dcf00ce | 2965 | (uint64_t) rel->r_offset, |
bf1747de | 2966 | howto->name, |
28dbbc02 | 2967 | name); |
bf1747de BW |
2968 | return FALSE; |
2969 | } | |
e0001a05 | 2970 | |
28dbbc02 BW |
2971 | /* TLS optimizations may have changed r_type; update "howto". */ |
2972 | howto = &elf_howto_table[r_type]; | |
2973 | ||
e0001a05 NC |
2974 | /* There's no point in calling bfd_perform_relocation here. |
2975 | Just go directly to our "special function". */ | |
2976 | r = elf_xtensa_do_reloc (howto, input_bfd, input_section, | |
2977 | relocation + rel->r_addend, | |
2978 | contents, rel->r_offset, is_weak_undef, | |
2979 | &error_message); | |
43cd72b9 | 2980 | |
9b8c98a4 | 2981 | if (r != bfd_reloc_ok && !warned) |
e0001a05 | 2982 | { |
43cd72b9 | 2983 | BFD_ASSERT (r == bfd_reloc_dangerous || r == bfd_reloc_other); |
7fa3d080 | 2984 | BFD_ASSERT (error_message != NULL); |
e0001a05 | 2985 | |
28dbbc02 BW |
2986 | if (rel->r_addend == 0) |
2987 | error_message = vsprint_msg (error_message, ": %s", | |
2988 | strlen (name) + 2, name); | |
e0001a05 | 2989 | else |
28dbbc02 BW |
2990 | error_message = vsprint_msg (error_message, ": (%s+0x%x)", |
2991 | strlen (name) + 22, | |
2992 | name, (int) rel->r_addend); | |
43cd72b9 | 2993 | |
1a72702b AM |
2994 | (*info->callbacks->reloc_dangerous) |
2995 | (info, error_message, input_bfd, input_section, rel->r_offset); | |
e0001a05 NC |
2996 | } |
2997 | } | |
2998 | ||
88d65ad6 BW |
2999 | if (lit_table) |
3000 | free (lit_table); | |
3001 | ||
3ba3bc8c BW |
3002 | input_section->reloc_done = TRUE; |
3003 | ||
e0001a05 NC |
3004 | return TRUE; |
3005 | } | |
3006 | ||
3007 | ||
3008 | /* Finish up dynamic symbol handling. There's not much to do here since | |
3009 | the PLT and GOT entries are all set up by relocate_section. */ | |
3010 | ||
3011 | static bfd_boolean | |
7fa3d080 BW |
3012 | elf_xtensa_finish_dynamic_symbol (bfd *output_bfd ATTRIBUTE_UNUSED, |
3013 | struct bfd_link_info *info ATTRIBUTE_UNUSED, | |
3014 | struct elf_link_hash_entry *h, | |
3015 | Elf_Internal_Sym *sym) | |
e0001a05 | 3016 | { |
bf1747de | 3017 | if (h->needs_plt && !h->def_regular) |
e0001a05 NC |
3018 | { |
3019 | /* Mark the symbol as undefined, rather than as defined in | |
3020 | the .plt section. Leave the value alone. */ | |
3021 | sym->st_shndx = SHN_UNDEF; | |
bf1747de BW |
3022 | /* If the symbol is weak, we do need to clear the value. |
3023 | Otherwise, the PLT entry would provide a definition for | |
3024 | the symbol even if the symbol wasn't defined anywhere, | |
3025 | and so the symbol would never be NULL. */ | |
3026 | if (!h->ref_regular_nonweak) | |
3027 | sym->st_value = 0; | |
e0001a05 NC |
3028 | } |
3029 | ||
3030 | /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */ | |
9637f6ef | 3031 | if (h == elf_hash_table (info)->hdynamic |
22edb2f1 | 3032 | || h == elf_hash_table (info)->hgot) |
e0001a05 NC |
3033 | sym->st_shndx = SHN_ABS; |
3034 | ||
3035 | return TRUE; | |
3036 | } | |
3037 | ||
3038 | ||
3039 | /* Combine adjacent literal table entries in the output. Adjacent | |
3040 | entries within each input section may have been removed during | |
3041 | relaxation, but we repeat the process here, even though it's too late | |
3042 | to shrink the output section, because it's important to minimize the | |
3043 | number of literal table entries to reduce the start-up work for the | |
3044 | runtime linker. Returns the number of remaining table entries or -1 | |
3045 | on error. */ | |
3046 | ||
3047 | static int | |
7fa3d080 BW |
3048 | elf_xtensa_combine_prop_entries (bfd *output_bfd, |
3049 | asection *sxtlit, | |
3050 | asection *sgotloc) | |
e0001a05 | 3051 | { |
e0001a05 NC |
3052 | bfd_byte *contents; |
3053 | property_table_entry *table; | |
e901de89 | 3054 | bfd_size_type section_size, sgotloc_size; |
e0001a05 NC |
3055 | bfd_vma offset; |
3056 | int n, m, num; | |
3057 | ||
eea6121a | 3058 | section_size = sxtlit->size; |
e0001a05 NC |
3059 | BFD_ASSERT (section_size % 8 == 0); |
3060 | num = section_size / 8; | |
3061 | ||
eea6121a | 3062 | sgotloc_size = sgotloc->size; |
e901de89 | 3063 | if (sgotloc_size != section_size) |
b536dc1e | 3064 | { |
4eca0228 | 3065 | _bfd_error_handler |
43cd72b9 | 3066 | (_("internal inconsistency in size of .got.loc section")); |
b536dc1e BW |
3067 | return -1; |
3068 | } | |
e901de89 | 3069 | |
eea6121a AM |
3070 | table = bfd_malloc (num * sizeof (property_table_entry)); |
3071 | if (table == 0) | |
e0001a05 NC |
3072 | return -1; |
3073 | ||
3074 | /* The ".xt.lit.plt" section has the SEC_IN_MEMORY flag set and this | |
3075 | propagates to the output section, where it doesn't really apply and | |
eea6121a | 3076 | where it breaks the following call to bfd_malloc_and_get_section. */ |
e901de89 | 3077 | sxtlit->flags &= ~SEC_IN_MEMORY; |
e0001a05 | 3078 | |
eea6121a AM |
3079 | if (!bfd_malloc_and_get_section (output_bfd, sxtlit, &contents)) |
3080 | { | |
3081 | if (contents != 0) | |
3082 | free (contents); | |
3083 | free (table); | |
3084 | return -1; | |
3085 | } | |
e0001a05 NC |
3086 | |
3087 | /* There should never be any relocations left at this point, so this | |
3088 | is quite a bit easier than what is done during relaxation. */ | |
3089 | ||
3090 | /* Copy the raw contents into a property table array and sort it. */ | |
3091 | offset = 0; | |
3092 | for (n = 0; n < num; n++) | |
3093 | { | |
3094 | table[n].address = bfd_get_32 (output_bfd, &contents[offset]); | |
3095 | table[n].size = bfd_get_32 (output_bfd, &contents[offset + 4]); | |
3096 | offset += 8; | |
3097 | } | |
3098 | qsort (table, num, sizeof (property_table_entry), property_table_compare); | |
3099 | ||
3100 | for (n = 0; n < num; n++) | |
3101 | { | |
91d6fa6a | 3102 | bfd_boolean remove_entry = FALSE; |
e0001a05 NC |
3103 | |
3104 | if (table[n].size == 0) | |
91d6fa6a NC |
3105 | remove_entry = TRUE; |
3106 | else if (n > 0 | |
3107 | && (table[n-1].address + table[n-1].size == table[n].address)) | |
e0001a05 NC |
3108 | { |
3109 | table[n-1].size += table[n].size; | |
91d6fa6a | 3110 | remove_entry = TRUE; |
e0001a05 NC |
3111 | } |
3112 | ||
91d6fa6a | 3113 | if (remove_entry) |
e0001a05 NC |
3114 | { |
3115 | for (m = n; m < num - 1; m++) | |
3116 | { | |
3117 | table[m].address = table[m+1].address; | |
3118 | table[m].size = table[m+1].size; | |
3119 | } | |
3120 | ||
3121 | n--; | |
3122 | num--; | |
3123 | } | |
3124 | } | |
3125 | ||
3126 | /* Copy the data back to the raw contents. */ | |
3127 | offset = 0; | |
3128 | for (n = 0; n < num; n++) | |
3129 | { | |
3130 | bfd_put_32 (output_bfd, table[n].address, &contents[offset]); | |
3131 | bfd_put_32 (output_bfd, table[n].size, &contents[offset + 4]); | |
3132 | offset += 8; | |
3133 | } | |
3134 | ||
3135 | /* Clear the removed bytes. */ | |
3136 | if ((bfd_size_type) (num * 8) < section_size) | |
b54d4b07 | 3137 | memset (&contents[num * 8], 0, section_size - num * 8); |
e0001a05 | 3138 | |
e901de89 BW |
3139 | if (! bfd_set_section_contents (output_bfd, sxtlit, contents, 0, |
3140 | section_size)) | |
e0001a05 NC |
3141 | return -1; |
3142 | ||
e901de89 BW |
3143 | /* Copy the contents to ".got.loc". */ |
3144 | memcpy (sgotloc->contents, contents, section_size); | |
3145 | ||
e0001a05 | 3146 | free (contents); |
b614a702 | 3147 | free (table); |
e0001a05 NC |
3148 | return num; |
3149 | } | |
3150 | ||
3151 | ||
3152 | /* Finish up the dynamic sections. */ | |
3153 | ||
3154 | static bfd_boolean | |
7fa3d080 BW |
3155 | elf_xtensa_finish_dynamic_sections (bfd *output_bfd, |
3156 | struct bfd_link_info *info) | |
e0001a05 | 3157 | { |
f0e6fdb2 | 3158 | struct elf_xtensa_link_hash_table *htab; |
e0001a05 | 3159 | bfd *dynobj; |
f82863d7 | 3160 | asection *sdyn, *srelplt, *srelgot, *sgot, *sxtlit, *sgotloc; |
e0001a05 | 3161 | Elf32_External_Dyn *dyncon, *dynconend; |
d9ab3f29 | 3162 | int num_xtlit_entries = 0; |
e0001a05 NC |
3163 | |
3164 | if (! elf_hash_table (info)->dynamic_sections_created) | |
3165 | return TRUE; | |
3166 | ||
f0e6fdb2 | 3167 | htab = elf_xtensa_hash_table (info); |
4dfe6ac6 NC |
3168 | if (htab == NULL) |
3169 | return FALSE; | |
3170 | ||
e0001a05 | 3171 | dynobj = elf_hash_table (info)->dynobj; |
3d4d4302 | 3172 | sdyn = bfd_get_linker_section (dynobj, ".dynamic"); |
e0001a05 NC |
3173 | BFD_ASSERT (sdyn != NULL); |
3174 | ||
3175 | /* Set the first entry in the global offset table to the address of | |
3176 | the dynamic section. */ | |
ce558b89 | 3177 | sgot = htab->elf.sgot; |
e0001a05 NC |
3178 | if (sgot) |
3179 | { | |
eea6121a | 3180 | BFD_ASSERT (sgot->size == 4); |
e0001a05 | 3181 | if (sdyn == NULL) |
7fa3d080 | 3182 | bfd_put_32 (output_bfd, 0, sgot->contents); |
e0001a05 NC |
3183 | else |
3184 | bfd_put_32 (output_bfd, | |
3185 | sdyn->output_section->vma + sdyn->output_offset, | |
3186 | sgot->contents); | |
3187 | } | |
3188 | ||
ce558b89 | 3189 | srelplt = htab->elf.srelplt; |
f82863d7 | 3190 | srelgot = htab->elf.srelgot; |
7fa3d080 | 3191 | if (srelplt && srelplt->size != 0) |
e0001a05 | 3192 | { |
f82863d7 | 3193 | asection *sgotplt, *spltlittbl; |
e0001a05 NC |
3194 | int chunk, plt_chunks, plt_entries; |
3195 | Elf_Internal_Rela irela; | |
3196 | bfd_byte *loc; | |
3197 | unsigned rtld_reloc; | |
3198 | ||
f0e6fdb2 BW |
3199 | spltlittbl = htab->spltlittbl; |
3200 | BFD_ASSERT (srelgot != NULL && spltlittbl != NULL); | |
e0001a05 NC |
3201 | |
3202 | /* Find the first XTENSA_RTLD relocation. Presumably the rest | |
3203 | of them follow immediately after.... */ | |
3204 | for (rtld_reloc = 0; rtld_reloc < srelgot->reloc_count; rtld_reloc++) | |
3205 | { | |
3206 | loc = srelgot->contents + rtld_reloc * sizeof (Elf32_External_Rela); | |
3207 | bfd_elf32_swap_reloca_in (output_bfd, loc, &irela); | |
3208 | if (ELF32_R_TYPE (irela.r_info) == R_XTENSA_RTLD) | |
3209 | break; | |
3210 | } | |
3211 | BFD_ASSERT (rtld_reloc < srelgot->reloc_count); | |
3212 | ||
eea6121a | 3213 | plt_entries = srelplt->size / sizeof (Elf32_External_Rela); |
e0001a05 NC |
3214 | plt_chunks = |
3215 | (plt_entries + PLT_ENTRIES_PER_CHUNK - 1) / PLT_ENTRIES_PER_CHUNK; | |
3216 | ||
3217 | for (chunk = 0; chunk < plt_chunks; chunk++) | |
3218 | { | |
3219 | int chunk_entries = 0; | |
3220 | ||
f0e6fdb2 | 3221 | sgotplt = elf_xtensa_get_gotplt_section (info, chunk); |
e0001a05 NC |
3222 | BFD_ASSERT (sgotplt != NULL); |
3223 | ||
3224 | /* Emit special RTLD relocations for the first two entries in | |
3225 | each chunk of the .got.plt section. */ | |
3226 | ||
3227 | loc = srelgot->contents + rtld_reloc * sizeof (Elf32_External_Rela); | |
3228 | bfd_elf32_swap_reloca_in (output_bfd, loc, &irela); | |
3229 | BFD_ASSERT (ELF32_R_TYPE (irela.r_info) == R_XTENSA_RTLD); | |
3230 | irela.r_offset = (sgotplt->output_section->vma | |
3231 | + sgotplt->output_offset); | |
3232 | irela.r_addend = 1; /* tell rtld to set value to resolver function */ | |
3233 | bfd_elf32_swap_reloca_out (output_bfd, &irela, loc); | |
3234 | rtld_reloc += 1; | |
3235 | BFD_ASSERT (rtld_reloc <= srelgot->reloc_count); | |
3236 | ||
3237 | /* Next literal immediately follows the first. */ | |
3238 | loc += sizeof (Elf32_External_Rela); | |
3239 | bfd_elf32_swap_reloca_in (output_bfd, loc, &irela); | |
3240 | BFD_ASSERT (ELF32_R_TYPE (irela.r_info) == R_XTENSA_RTLD); | |
3241 | irela.r_offset = (sgotplt->output_section->vma | |
3242 | + sgotplt->output_offset + 4); | |
3243 | /* Tell rtld to set value to object's link map. */ | |
3244 | irela.r_addend = 2; | |
3245 | bfd_elf32_swap_reloca_out (output_bfd, &irela, loc); | |
3246 | rtld_reloc += 1; | |
3247 | BFD_ASSERT (rtld_reloc <= srelgot->reloc_count); | |
3248 | ||
3249 | /* Fill in the literal table. */ | |
3250 | if (chunk < plt_chunks - 1) | |
3251 | chunk_entries = PLT_ENTRIES_PER_CHUNK; | |
3252 | else | |
3253 | chunk_entries = plt_entries - (chunk * PLT_ENTRIES_PER_CHUNK); | |
3254 | ||
eea6121a | 3255 | BFD_ASSERT ((unsigned) (chunk + 1) * 8 <= spltlittbl->size); |
e0001a05 NC |
3256 | bfd_put_32 (output_bfd, |
3257 | sgotplt->output_section->vma + sgotplt->output_offset, | |
3258 | spltlittbl->contents + (chunk * 8) + 0); | |
3259 | bfd_put_32 (output_bfd, | |
3260 | 8 + (chunk_entries * 4), | |
3261 | spltlittbl->contents + (chunk * 8) + 4); | |
3262 | } | |
3263 | ||
e0001a05 NC |
3264 | /* The .xt.lit.plt section has just been modified. This must |
3265 | happen before the code below which combines adjacent literal | |
3266 | table entries, and the .xt.lit.plt contents have to be forced to | |
3267 | the output here. */ | |
3268 | if (! bfd_set_section_contents (output_bfd, | |
3269 | spltlittbl->output_section, | |
3270 | spltlittbl->contents, | |
3271 | spltlittbl->output_offset, | |
eea6121a | 3272 | spltlittbl->size)) |
e0001a05 NC |
3273 | return FALSE; |
3274 | /* Clear SEC_HAS_CONTENTS so the contents won't be output again. */ | |
3275 | spltlittbl->flags &= ~SEC_HAS_CONTENTS; | |
3276 | } | |
3277 | ||
f82863d7 MF |
3278 | /* All the dynamic relocations have been emitted at this point. |
3279 | Make sure the relocation sections are the correct size. */ | |
3280 | if ((srelgot && srelgot->size != (sizeof (Elf32_External_Rela) | |
3281 | * srelgot->reloc_count)) | |
3282 | || (srelplt && srelplt->size != (sizeof (Elf32_External_Rela) | |
3283 | * srelplt->reloc_count))) | |
3284 | abort (); | |
3285 | ||
e0001a05 | 3286 | /* Combine adjacent literal table entries. */ |
0e1862bb | 3287 | BFD_ASSERT (! bfd_link_relocatable (info)); |
e901de89 | 3288 | sxtlit = bfd_get_section_by_name (output_bfd, ".xt.lit"); |
f0e6fdb2 | 3289 | sgotloc = htab->sgotloc; |
d9ab3f29 BW |
3290 | BFD_ASSERT (sgotloc); |
3291 | if (sxtlit) | |
3292 | { | |
3293 | num_xtlit_entries = | |
3294 | elf_xtensa_combine_prop_entries (output_bfd, sxtlit, sgotloc); | |
3295 | if (num_xtlit_entries < 0) | |
3296 | return FALSE; | |
3297 | } | |
e0001a05 NC |
3298 | |
3299 | dyncon = (Elf32_External_Dyn *) sdyn->contents; | |
eea6121a | 3300 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); |
e0001a05 NC |
3301 | for (; dyncon < dynconend; dyncon++) |
3302 | { | |
3303 | Elf_Internal_Dyn dyn; | |
e0001a05 NC |
3304 | |
3305 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); | |
3306 | ||
3307 | switch (dyn.d_tag) | |
3308 | { | |
3309 | default: | |
3310 | break; | |
3311 | ||
3312 | case DT_XTENSA_GOT_LOC_SZ: | |
e0001a05 NC |
3313 | dyn.d_un.d_val = num_xtlit_entries; |
3314 | break; | |
3315 | ||
3316 | case DT_XTENSA_GOT_LOC_OFF: | |
4ade44b7 AM |
3317 | dyn.d_un.d_ptr = (htab->sgotloc->output_section->vma |
3318 | + htab->sgotloc->output_offset); | |
f0e6fdb2 BW |
3319 | break; |
3320 | ||
e0001a05 | 3321 | case DT_PLTGOT: |
ce558b89 AM |
3322 | dyn.d_un.d_ptr = (htab->elf.sgot->output_section->vma |
3323 | + htab->elf.sgot->output_offset); | |
f0e6fdb2 BW |
3324 | break; |
3325 | ||
e0001a05 | 3326 | case DT_JMPREL: |
ce558b89 AM |
3327 | dyn.d_un.d_ptr = (htab->elf.srelplt->output_section->vma |
3328 | + htab->elf.srelplt->output_offset); | |
e0001a05 NC |
3329 | break; |
3330 | ||
3331 | case DT_PLTRELSZ: | |
ce558b89 | 3332 | dyn.d_un.d_val = htab->elf.srelplt->size; |
e0001a05 | 3333 | break; |
e0001a05 NC |
3334 | } |
3335 | ||
3336 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); | |
3337 | } | |
3338 | ||
3339 | return TRUE; | |
3340 | } | |
3341 | ||
3342 | \f | |
3343 | /* Functions for dealing with the e_flags field. */ | |
3344 | ||
3345 | /* Merge backend specific data from an object file to the output | |
3346 | object file when linking. */ | |
3347 | ||
3348 | static bfd_boolean | |
50e03d47 | 3349 | elf_xtensa_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info) |
e0001a05 | 3350 | { |
50e03d47 | 3351 | bfd *obfd = info->output_bfd; |
e0001a05 NC |
3352 | unsigned out_mach, in_mach; |
3353 | flagword out_flag, in_flag; | |
3354 | ||
cc643b88 | 3355 | /* Check if we have the same endianness. */ |
50e03d47 | 3356 | if (!_bfd_generic_verify_endian_match (ibfd, info)) |
e0001a05 NC |
3357 | return FALSE; |
3358 | ||
3359 | /* Don't even pretend to support mixed-format linking. */ | |
3360 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour | |
3361 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) | |
3362 | return FALSE; | |
3363 | ||
3364 | out_flag = elf_elfheader (obfd)->e_flags; | |
3365 | in_flag = elf_elfheader (ibfd)->e_flags; | |
3366 | ||
3367 | out_mach = out_flag & EF_XTENSA_MACH; | |
3368 | in_mach = in_flag & EF_XTENSA_MACH; | |
43cd72b9 | 3369 | if (out_mach != in_mach) |
e0001a05 | 3370 | { |
4eca0228 | 3371 | _bfd_error_handler |
695344c0 | 3372 | /* xgettext:c-format */ |
38f14ab8 | 3373 | (_("%pB: incompatible machine type; output is 0x%x; input is 0x%x"), |
d003868e | 3374 | ibfd, out_mach, in_mach); |
e0001a05 NC |
3375 | bfd_set_error (bfd_error_wrong_format); |
3376 | return FALSE; | |
3377 | } | |
3378 | ||
3379 | if (! elf_flags_init (obfd)) | |
3380 | { | |
3381 | elf_flags_init (obfd) = TRUE; | |
3382 | elf_elfheader (obfd)->e_flags = in_flag; | |
43cd72b9 | 3383 | |
e0001a05 NC |
3384 | if (bfd_get_arch (obfd) == bfd_get_arch (ibfd) |
3385 | && bfd_get_arch_info (obfd)->the_default) | |
3386 | return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), | |
3387 | bfd_get_mach (ibfd)); | |
43cd72b9 | 3388 | |
e0001a05 NC |
3389 | return TRUE; |
3390 | } | |
3391 | ||
68ffbac6 | 3392 | if ((out_flag & EF_XTENSA_XT_INSN) != (in_flag & EF_XTENSA_XT_INSN)) |
43cd72b9 | 3393 | elf_elfheader (obfd)->e_flags &= (~ EF_XTENSA_XT_INSN); |
e0001a05 | 3394 | |
68ffbac6 | 3395 | if ((out_flag & EF_XTENSA_XT_LIT) != (in_flag & EF_XTENSA_XT_LIT)) |
43cd72b9 | 3396 | elf_elfheader (obfd)->e_flags &= (~ EF_XTENSA_XT_LIT); |
e0001a05 NC |
3397 | |
3398 | return TRUE; | |
3399 | } | |
3400 | ||
3401 | ||
3402 | static bfd_boolean | |
7fa3d080 | 3403 | elf_xtensa_set_private_flags (bfd *abfd, flagword flags) |
e0001a05 NC |
3404 | { |
3405 | BFD_ASSERT (!elf_flags_init (abfd) | |
3406 | || elf_elfheader (abfd)->e_flags == flags); | |
3407 | ||
3408 | elf_elfheader (abfd)->e_flags |= flags; | |
3409 | elf_flags_init (abfd) = TRUE; | |
3410 | ||
3411 | return TRUE; | |
3412 | } | |
3413 | ||
3414 | ||
e0001a05 | 3415 | static bfd_boolean |
7fa3d080 | 3416 | elf_xtensa_print_private_bfd_data (bfd *abfd, void *farg) |
e0001a05 NC |
3417 | { |
3418 | FILE *f = (FILE *) farg; | |
3419 | flagword e_flags = elf_elfheader (abfd)->e_flags; | |
3420 | ||
3421 | fprintf (f, "\nXtensa header:\n"); | |
43cd72b9 | 3422 | if ((e_flags & EF_XTENSA_MACH) == E_XTENSA_MACH) |
e0001a05 NC |
3423 | fprintf (f, "\nMachine = Base\n"); |
3424 | else | |
3425 | fprintf (f, "\nMachine Id = 0x%x\n", e_flags & EF_XTENSA_MACH); | |
3426 | ||
3427 | fprintf (f, "Insn tables = %s\n", | |
3428 | (e_flags & EF_XTENSA_XT_INSN) ? "true" : "false"); | |
3429 | ||
3430 | fprintf (f, "Literal tables = %s\n", | |
3431 | (e_flags & EF_XTENSA_XT_LIT) ? "true" : "false"); | |
3432 | ||
3433 | return _bfd_elf_print_private_bfd_data (abfd, farg); | |
3434 | } | |
3435 | ||
3436 | ||
3437 | /* Set the right machine number for an Xtensa ELF file. */ | |
3438 | ||
3439 | static bfd_boolean | |
7fa3d080 | 3440 | elf_xtensa_object_p (bfd *abfd) |
e0001a05 NC |
3441 | { |
3442 | int mach; | |
3443 | unsigned long arch = elf_elfheader (abfd)->e_flags & EF_XTENSA_MACH; | |
3444 | ||
3445 | switch (arch) | |
3446 | { | |
3447 | case E_XTENSA_MACH: | |
3448 | mach = bfd_mach_xtensa; | |
3449 | break; | |
3450 | default: | |
3451 | return FALSE; | |
3452 | } | |
3453 | ||
3454 | (void) bfd_default_set_arch_mach (abfd, bfd_arch_xtensa, mach); | |
3455 | return TRUE; | |
3456 | } | |
3457 | ||
3458 | ||
3459 | /* The final processing done just before writing out an Xtensa ELF object | |
3460 | file. This gets the Xtensa architecture right based on the machine | |
3461 | number. */ | |
3462 | ||
3463 | static void | |
7fa3d080 BW |
3464 | elf_xtensa_final_write_processing (bfd *abfd, |
3465 | bfd_boolean linker ATTRIBUTE_UNUSED) | |
e0001a05 NC |
3466 | { |
3467 | int mach; | |
3468 | unsigned long val; | |
3469 | ||
3470 | switch (mach = bfd_get_mach (abfd)) | |
3471 | { | |
3472 | case bfd_mach_xtensa: | |
3473 | val = E_XTENSA_MACH; | |
3474 | break; | |
3475 | default: | |
3476 | return; | |
3477 | } | |
3478 | ||
3479 | elf_elfheader (abfd)->e_flags &= (~ EF_XTENSA_MACH); | |
3480 | elf_elfheader (abfd)->e_flags |= val; | |
3481 | } | |
3482 | ||
3483 | ||
3484 | static enum elf_reloc_type_class | |
7e612e98 AM |
3485 | elf_xtensa_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED, |
3486 | const asection *rel_sec ATTRIBUTE_UNUSED, | |
3487 | const Elf_Internal_Rela *rela) | |
e0001a05 NC |
3488 | { |
3489 | switch ((int) ELF32_R_TYPE (rela->r_info)) | |
3490 | { | |
3491 | case R_XTENSA_RELATIVE: | |
3492 | return reloc_class_relative; | |
3493 | case R_XTENSA_JMP_SLOT: | |
3494 | return reloc_class_plt; | |
3495 | default: | |
3496 | return reloc_class_normal; | |
3497 | } | |
3498 | } | |
3499 | ||
3500 | \f | |
3501 | static bfd_boolean | |
7fa3d080 BW |
3502 | elf_xtensa_discard_info_for_section (bfd *abfd, |
3503 | struct elf_reloc_cookie *cookie, | |
3504 | struct bfd_link_info *info, | |
3505 | asection *sec) | |
e0001a05 NC |
3506 | { |
3507 | bfd_byte *contents; | |
e0001a05 | 3508 | bfd_vma offset, actual_offset; |
1d25768e BW |
3509 | bfd_size_type removed_bytes = 0; |
3510 | bfd_size_type entry_size; | |
e0001a05 NC |
3511 | |
3512 | if (sec->output_section | |
3513 | && bfd_is_abs_section (sec->output_section)) | |
3514 | return FALSE; | |
3515 | ||
1d25768e BW |
3516 | if (xtensa_is_proptable_section (sec)) |
3517 | entry_size = 12; | |
3518 | else | |
3519 | entry_size = 8; | |
3520 | ||
a3ef2d63 | 3521 | if (sec->size == 0 || sec->size % entry_size != 0) |
1d25768e BW |
3522 | return FALSE; |
3523 | ||
e0001a05 NC |
3524 | contents = retrieve_contents (abfd, sec, info->keep_memory); |
3525 | if (!contents) | |
3526 | return FALSE; | |
3527 | ||
3528 | cookie->rels = retrieve_internal_relocs (abfd, sec, info->keep_memory); | |
3529 | if (!cookie->rels) | |
3530 | { | |
3531 | release_contents (sec, contents); | |
3532 | return FALSE; | |
3533 | } | |
3534 | ||
1d25768e BW |
3535 | /* Sort the relocations. They should already be in order when |
3536 | relaxation is enabled, but it might not be. */ | |
3537 | qsort (cookie->rels, sec->reloc_count, sizeof (Elf_Internal_Rela), | |
3538 | internal_reloc_compare); | |
3539 | ||
e0001a05 NC |
3540 | cookie->rel = cookie->rels; |
3541 | cookie->relend = cookie->rels + sec->reloc_count; | |
3542 | ||
a3ef2d63 | 3543 | for (offset = 0; offset < sec->size; offset += entry_size) |
e0001a05 NC |
3544 | { |
3545 | actual_offset = offset - removed_bytes; | |
3546 | ||
3547 | /* The ...symbol_deleted_p function will skip over relocs but it | |
3548 | won't adjust their offsets, so do that here. */ | |
3549 | while (cookie->rel < cookie->relend | |
3550 | && cookie->rel->r_offset < offset) | |
3551 | { | |
3552 | cookie->rel->r_offset -= removed_bytes; | |
3553 | cookie->rel++; | |
3554 | } | |
3555 | ||
3556 | while (cookie->rel < cookie->relend | |
3557 | && cookie->rel->r_offset == offset) | |
3558 | { | |
c152c796 | 3559 | if (bfd_elf_reloc_symbol_deleted_p (offset, cookie)) |
e0001a05 NC |
3560 | { |
3561 | /* Remove the table entry. (If the reloc type is NONE, then | |
3562 | the entry has already been merged with another and deleted | |
3563 | during relaxation.) */ | |
3564 | if (ELF32_R_TYPE (cookie->rel->r_info) != R_XTENSA_NONE) | |
3565 | { | |
3566 | /* Shift the contents up. */ | |
a3ef2d63 | 3567 | if (offset + entry_size < sec->size) |
e0001a05 | 3568 | memmove (&contents[actual_offset], |
1d25768e | 3569 | &contents[actual_offset + entry_size], |
a3ef2d63 | 3570 | sec->size - offset - entry_size); |
1d25768e | 3571 | removed_bytes += entry_size; |
e0001a05 NC |
3572 | } |
3573 | ||
3574 | /* Remove this relocation. */ | |
3575 | cookie->rel->r_info = ELF32_R_INFO (0, R_XTENSA_NONE); | |
3576 | } | |
3577 | ||
3578 | /* Adjust the relocation offset for previous removals. This | |
3579 | should not be done before calling ...symbol_deleted_p | |
3580 | because it might mess up the offset comparisons there. | |
3581 | Make sure the offset doesn't underflow in the case where | |
3582 | the first entry is removed. */ | |
3583 | if (cookie->rel->r_offset >= removed_bytes) | |
3584 | cookie->rel->r_offset -= removed_bytes; | |
3585 | else | |
3586 | cookie->rel->r_offset = 0; | |
3587 | ||
3588 | cookie->rel++; | |
3589 | } | |
3590 | } | |
3591 | ||
3592 | if (removed_bytes != 0) | |
3593 | { | |
3594 | /* Adjust any remaining relocs (shouldn't be any). */ | |
3595 | for (; cookie->rel < cookie->relend; cookie->rel++) | |
3596 | { | |
3597 | if (cookie->rel->r_offset >= removed_bytes) | |
3598 | cookie->rel->r_offset -= removed_bytes; | |
3599 | else | |
3600 | cookie->rel->r_offset = 0; | |
3601 | } | |
3602 | ||
3603 | /* Clear the removed bytes. */ | |
a3ef2d63 | 3604 | memset (&contents[sec->size - removed_bytes], 0, removed_bytes); |
e0001a05 NC |
3605 | |
3606 | pin_contents (sec, contents); | |
3607 | pin_internal_relocs (sec, cookie->rels); | |
3608 | ||
eea6121a | 3609 | /* Shrink size. */ |
a3ef2d63 BW |
3610 | if (sec->rawsize == 0) |
3611 | sec->rawsize = sec->size; | |
3612 | sec->size -= removed_bytes; | |
b536dc1e BW |
3613 | |
3614 | if (xtensa_is_littable_section (sec)) | |
3615 | { | |
f0e6fdb2 BW |
3616 | asection *sgotloc = elf_xtensa_hash_table (info)->sgotloc; |
3617 | if (sgotloc) | |
3618 | sgotloc->size -= removed_bytes; | |
b536dc1e | 3619 | } |
e0001a05 NC |
3620 | } |
3621 | else | |
3622 | { | |
3623 | release_contents (sec, contents); | |
3624 | release_internal_relocs (sec, cookie->rels); | |
3625 | } | |
3626 | ||
3627 | return (removed_bytes != 0); | |
3628 | } | |
3629 | ||
3630 | ||
3631 | static bfd_boolean | |
7fa3d080 BW |
3632 | elf_xtensa_discard_info (bfd *abfd, |
3633 | struct elf_reloc_cookie *cookie, | |
3634 | struct bfd_link_info *info) | |
e0001a05 NC |
3635 | { |
3636 | asection *sec; | |
3637 | bfd_boolean changed = FALSE; | |
3638 | ||
3639 | for (sec = abfd->sections; sec != NULL; sec = sec->next) | |
3640 | { | |
3641 | if (xtensa_is_property_section (sec)) | |
3642 | { | |
3643 | if (elf_xtensa_discard_info_for_section (abfd, cookie, info, sec)) | |
3644 | changed = TRUE; | |
3645 | } | |
3646 | } | |
3647 | ||
3648 | return changed; | |
3649 | } | |
3650 | ||
3651 | ||
3652 | static bfd_boolean | |
7fa3d080 | 3653 | elf_xtensa_ignore_discarded_relocs (asection *sec) |
e0001a05 NC |
3654 | { |
3655 | return xtensa_is_property_section (sec); | |
3656 | } | |
3657 | ||
a77dc2cc BW |
3658 | |
3659 | static unsigned int | |
3660 | elf_xtensa_action_discarded (asection *sec) | |
3661 | { | |
3662 | if (strcmp (".xt_except_table", sec->name) == 0) | |
3663 | return 0; | |
3664 | ||
3665 | if (strcmp (".xt_except_desc", sec->name) == 0) | |
3666 | return 0; | |
3667 | ||
3668 | return _bfd_elf_default_action_discarded (sec); | |
3669 | } | |
3670 | ||
e0001a05 NC |
3671 | \f |
3672 | /* Support for core dump NOTE sections. */ | |
3673 | ||
3674 | static bfd_boolean | |
7fa3d080 | 3675 | elf_xtensa_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) |
e0001a05 NC |
3676 | { |
3677 | int offset; | |
eea6121a | 3678 | unsigned int size; |
e0001a05 NC |
3679 | |
3680 | /* The size for Xtensa is variable, so don't try to recognize the format | |
3681 | based on the size. Just assume this is GNU/Linux. */ | |
3682 | ||
3683 | /* pr_cursig */ | |
228e534f | 3684 | elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12); |
e0001a05 NC |
3685 | |
3686 | /* pr_pid */ | |
228e534f | 3687 | elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24); |
e0001a05 NC |
3688 | |
3689 | /* pr_reg */ | |
3690 | offset = 72; | |
eea6121a | 3691 | size = note->descsz - offset - 4; |
e0001a05 NC |
3692 | |
3693 | /* Make a ".reg/999" section. */ | |
3694 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", | |
eea6121a | 3695 | size, note->descpos + offset); |
e0001a05 NC |
3696 | } |
3697 | ||
3698 | ||
3699 | static bfd_boolean | |
7fa3d080 | 3700 | elf_xtensa_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) |
e0001a05 NC |
3701 | { |
3702 | switch (note->descsz) | |
3703 | { | |
3704 | default: | |
3705 | return FALSE; | |
3706 | ||
3707 | case 128: /* GNU/Linux elf_prpsinfo */ | |
228e534f | 3708 | elf_tdata (abfd)->core->program |
e0001a05 | 3709 | = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16); |
228e534f | 3710 | elf_tdata (abfd)->core->command |
e0001a05 NC |
3711 | = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80); |
3712 | } | |
3713 | ||
3714 | /* Note that for some reason, a spurious space is tacked | |
3715 | onto the end of the args in some (at least one anyway) | |
3716 | implementations, so strip it off if it exists. */ | |
3717 | ||
3718 | { | |
228e534f | 3719 | char *command = elf_tdata (abfd)->core->command; |
e0001a05 NC |
3720 | int n = strlen (command); |
3721 | ||
3722 | if (0 < n && command[n - 1] == ' ') | |
3723 | command[n - 1] = '\0'; | |
3724 | } | |
3725 | ||
3726 | return TRUE; | |
3727 | } | |
3728 | ||
3729 | \f | |
3730 | /* Generic Xtensa configurability stuff. */ | |
3731 | ||
3732 | static xtensa_opcode callx0_op = XTENSA_UNDEFINED; | |
3733 | static xtensa_opcode callx4_op = XTENSA_UNDEFINED; | |
3734 | static xtensa_opcode callx8_op = XTENSA_UNDEFINED; | |
3735 | static xtensa_opcode callx12_op = XTENSA_UNDEFINED; | |
3736 | static xtensa_opcode call0_op = XTENSA_UNDEFINED; | |
3737 | static xtensa_opcode call4_op = XTENSA_UNDEFINED; | |
3738 | static xtensa_opcode call8_op = XTENSA_UNDEFINED; | |
3739 | static xtensa_opcode call12_op = XTENSA_UNDEFINED; | |
3740 | ||
3741 | static void | |
7fa3d080 | 3742 | init_call_opcodes (void) |
e0001a05 NC |
3743 | { |
3744 | if (callx0_op == XTENSA_UNDEFINED) | |
3745 | { | |
3746 | callx0_op = xtensa_opcode_lookup (xtensa_default_isa, "callx0"); | |
3747 | callx4_op = xtensa_opcode_lookup (xtensa_default_isa, "callx4"); | |
3748 | callx8_op = xtensa_opcode_lookup (xtensa_default_isa, "callx8"); | |
3749 | callx12_op = xtensa_opcode_lookup (xtensa_default_isa, "callx12"); | |
3750 | call0_op = xtensa_opcode_lookup (xtensa_default_isa, "call0"); | |
3751 | call4_op = xtensa_opcode_lookup (xtensa_default_isa, "call4"); | |
3752 | call8_op = xtensa_opcode_lookup (xtensa_default_isa, "call8"); | |
3753 | call12_op = xtensa_opcode_lookup (xtensa_default_isa, "call12"); | |
3754 | } | |
3755 | } | |
3756 | ||
3757 | ||
3758 | static bfd_boolean | |
7fa3d080 | 3759 | is_indirect_call_opcode (xtensa_opcode opcode) |
e0001a05 NC |
3760 | { |
3761 | init_call_opcodes (); | |
3762 | return (opcode == callx0_op | |
3763 | || opcode == callx4_op | |
3764 | || opcode == callx8_op | |
3765 | || opcode == callx12_op); | |
3766 | } | |
3767 | ||
3768 | ||
3769 | static bfd_boolean | |
7fa3d080 | 3770 | is_direct_call_opcode (xtensa_opcode opcode) |
e0001a05 NC |
3771 | { |
3772 | init_call_opcodes (); | |
3773 | return (opcode == call0_op | |
3774 | || opcode == call4_op | |
3775 | || opcode == call8_op | |
3776 | || opcode == call12_op); | |
3777 | } | |
3778 | ||
3779 | ||
3780 | static bfd_boolean | |
7fa3d080 | 3781 | is_windowed_call_opcode (xtensa_opcode opcode) |
e0001a05 NC |
3782 | { |
3783 | init_call_opcodes (); | |
3784 | return (opcode == call4_op | |
3785 | || opcode == call8_op | |
3786 | || opcode == call12_op | |
3787 | || opcode == callx4_op | |
3788 | || opcode == callx8_op | |
3789 | || opcode == callx12_op); | |
3790 | } | |
3791 | ||
3792 | ||
28dbbc02 BW |
3793 | static bfd_boolean |
3794 | get_indirect_call_dest_reg (xtensa_opcode opcode, unsigned *pdst) | |
3795 | { | |
3796 | unsigned dst = (unsigned) -1; | |
3797 | ||
3798 | init_call_opcodes (); | |
3799 | if (opcode == callx0_op) | |
3800 | dst = 0; | |
3801 | else if (opcode == callx4_op) | |
3802 | dst = 4; | |
3803 | else if (opcode == callx8_op) | |
3804 | dst = 8; | |
3805 | else if (opcode == callx12_op) | |
3806 | dst = 12; | |
3807 | ||
3808 | if (dst == (unsigned) -1) | |
3809 | return FALSE; | |
3810 | ||
3811 | *pdst = dst; | |
3812 | return TRUE; | |
3813 | } | |
3814 | ||
3815 | ||
43cd72b9 BW |
3816 | static xtensa_opcode |
3817 | get_const16_opcode (void) | |
3818 | { | |
3819 | static bfd_boolean done_lookup = FALSE; | |
3820 | static xtensa_opcode const16_opcode = XTENSA_UNDEFINED; | |
3821 | if (!done_lookup) | |
3822 | { | |
3823 | const16_opcode = xtensa_opcode_lookup (xtensa_default_isa, "const16"); | |
3824 | done_lookup = TRUE; | |
3825 | } | |
3826 | return const16_opcode; | |
3827 | } | |
3828 | ||
3829 | ||
e0001a05 NC |
3830 | static xtensa_opcode |
3831 | get_l32r_opcode (void) | |
3832 | { | |
3833 | static xtensa_opcode l32r_opcode = XTENSA_UNDEFINED; | |
43cd72b9 BW |
3834 | static bfd_boolean done_lookup = FALSE; |
3835 | ||
3836 | if (!done_lookup) | |
e0001a05 NC |
3837 | { |
3838 | l32r_opcode = xtensa_opcode_lookup (xtensa_default_isa, "l32r"); | |
43cd72b9 | 3839 | done_lookup = TRUE; |
e0001a05 NC |
3840 | } |
3841 | return l32r_opcode; | |
3842 | } | |
3843 | ||
3844 | ||
3845 | static bfd_vma | |
7fa3d080 | 3846 | l32r_offset (bfd_vma addr, bfd_vma pc) |
e0001a05 NC |
3847 | { |
3848 | bfd_vma offset; | |
3849 | ||
3850 | offset = addr - ((pc+3) & -4); | |
3851 | BFD_ASSERT ((offset & ((1 << 2) - 1)) == 0); | |
3852 | offset = (signed int) offset >> 2; | |
3853 | BFD_ASSERT ((signed int) offset >> 16 == -1); | |
3854 | return offset; | |
3855 | } | |
3856 | ||
3857 | ||
e0001a05 | 3858 | static int |
7fa3d080 | 3859 | get_relocation_opnd (xtensa_opcode opcode, int r_type) |
e0001a05 | 3860 | { |
43cd72b9 BW |
3861 | xtensa_isa isa = xtensa_default_isa; |
3862 | int last_immed, last_opnd, opi; | |
3863 | ||
3864 | if (opcode == XTENSA_UNDEFINED) | |
3865 | return XTENSA_UNDEFINED; | |
3866 | ||
3867 | /* Find the last visible PC-relative immediate operand for the opcode. | |
3868 | If there are no PC-relative immediates, then choose the last visible | |
3869 | immediate; otherwise, fail and return XTENSA_UNDEFINED. */ | |
3870 | last_immed = XTENSA_UNDEFINED; | |
3871 | last_opnd = xtensa_opcode_num_operands (isa, opcode); | |
3872 | for (opi = last_opnd - 1; opi >= 0; opi--) | |
3873 | { | |
3874 | if (xtensa_operand_is_visible (isa, opcode, opi) == 0) | |
3875 | continue; | |
3876 | if (xtensa_operand_is_PCrelative (isa, opcode, opi) == 1) | |
3877 | { | |
3878 | last_immed = opi; | |
3879 | break; | |
3880 | } | |
3881 | if (last_immed == XTENSA_UNDEFINED | |
3882 | && xtensa_operand_is_register (isa, opcode, opi) == 0) | |
3883 | last_immed = opi; | |
3884 | } | |
3885 | if (last_immed < 0) | |
3886 | return XTENSA_UNDEFINED; | |
3887 | ||
3888 | /* If the operand number was specified in an old-style relocation, | |
3889 | check for consistency with the operand computed above. */ | |
3890 | if (r_type >= R_XTENSA_OP0 && r_type <= R_XTENSA_OP2) | |
3891 | { | |
3892 | int reloc_opnd = r_type - R_XTENSA_OP0; | |
3893 | if (reloc_opnd != last_immed) | |
3894 | return XTENSA_UNDEFINED; | |
3895 | } | |
3896 | ||
3897 | return last_immed; | |
3898 | } | |
3899 | ||
3900 | ||
3901 | int | |
7fa3d080 | 3902 | get_relocation_slot (int r_type) |
43cd72b9 BW |
3903 | { |
3904 | switch (r_type) | |
3905 | { | |
3906 | case R_XTENSA_OP0: | |
3907 | case R_XTENSA_OP1: | |
3908 | case R_XTENSA_OP2: | |
3909 | return 0; | |
3910 | ||
3911 | default: | |
3912 | if (r_type >= R_XTENSA_SLOT0_OP && r_type <= R_XTENSA_SLOT14_OP) | |
3913 | return r_type - R_XTENSA_SLOT0_OP; | |
3914 | if (r_type >= R_XTENSA_SLOT0_ALT && r_type <= R_XTENSA_SLOT14_ALT) | |
3915 | return r_type - R_XTENSA_SLOT0_ALT; | |
3916 | break; | |
3917 | } | |
3918 | ||
3919 | return XTENSA_UNDEFINED; | |
e0001a05 NC |
3920 | } |
3921 | ||
3922 | ||
3923 | /* Get the opcode for a relocation. */ | |
3924 | ||
3925 | static xtensa_opcode | |
7fa3d080 BW |
3926 | get_relocation_opcode (bfd *abfd, |
3927 | asection *sec, | |
3928 | bfd_byte *contents, | |
3929 | Elf_Internal_Rela *irel) | |
e0001a05 NC |
3930 | { |
3931 | static xtensa_insnbuf ibuff = NULL; | |
43cd72b9 | 3932 | static xtensa_insnbuf sbuff = NULL; |
e0001a05 | 3933 | xtensa_isa isa = xtensa_default_isa; |
43cd72b9 BW |
3934 | xtensa_format fmt; |
3935 | int slot; | |
e0001a05 NC |
3936 | |
3937 | if (contents == NULL) | |
3938 | return XTENSA_UNDEFINED; | |
3939 | ||
43cd72b9 | 3940 | if (bfd_get_section_limit (abfd, sec) <= irel->r_offset) |
e0001a05 NC |
3941 | return XTENSA_UNDEFINED; |
3942 | ||
3943 | if (ibuff == NULL) | |
43cd72b9 BW |
3944 | { |
3945 | ibuff = xtensa_insnbuf_alloc (isa); | |
3946 | sbuff = xtensa_insnbuf_alloc (isa); | |
3947 | } | |
3948 | ||
e0001a05 | 3949 | /* Decode the instruction. */ |
43cd72b9 BW |
3950 | xtensa_insnbuf_from_chars (isa, ibuff, &contents[irel->r_offset], |
3951 | sec->size - irel->r_offset); | |
3952 | fmt = xtensa_format_decode (isa, ibuff); | |
3953 | slot = get_relocation_slot (ELF32_R_TYPE (irel->r_info)); | |
3954 | if (slot == XTENSA_UNDEFINED) | |
3955 | return XTENSA_UNDEFINED; | |
3956 | xtensa_format_get_slot (isa, fmt, slot, ibuff, sbuff); | |
3957 | return xtensa_opcode_decode (isa, fmt, slot, sbuff); | |
e0001a05 NC |
3958 | } |
3959 | ||
3960 | ||
3961 | bfd_boolean | |
7fa3d080 BW |
3962 | is_l32r_relocation (bfd *abfd, |
3963 | asection *sec, | |
3964 | bfd_byte *contents, | |
3965 | Elf_Internal_Rela *irel) | |
e0001a05 NC |
3966 | { |
3967 | xtensa_opcode opcode; | |
43cd72b9 | 3968 | if (!is_operand_relocation (ELF32_R_TYPE (irel->r_info))) |
e0001a05 | 3969 | return FALSE; |
43cd72b9 | 3970 | opcode = get_relocation_opcode (abfd, sec, contents, irel); |
e0001a05 NC |
3971 | return (opcode == get_l32r_opcode ()); |
3972 | } | |
3973 | ||
e0001a05 | 3974 | |
43cd72b9 | 3975 | static bfd_size_type |
7fa3d080 BW |
3976 | get_asm_simplify_size (bfd_byte *contents, |
3977 | bfd_size_type content_len, | |
3978 | bfd_size_type offset) | |
e0001a05 | 3979 | { |
43cd72b9 | 3980 | bfd_size_type insnlen, size = 0; |
e0001a05 | 3981 | |
43cd72b9 BW |
3982 | /* Decode the size of the next two instructions. */ |
3983 | insnlen = insn_decode_len (contents, content_len, offset); | |
3984 | if (insnlen == 0) | |
3985 | return 0; | |
e0001a05 | 3986 | |
43cd72b9 | 3987 | size += insnlen; |
68ffbac6 | 3988 | |
43cd72b9 BW |
3989 | insnlen = insn_decode_len (contents, content_len, offset + size); |
3990 | if (insnlen == 0) | |
3991 | return 0; | |
e0001a05 | 3992 | |
43cd72b9 BW |
3993 | size += insnlen; |
3994 | return size; | |
3995 | } | |
e0001a05 | 3996 | |
43cd72b9 BW |
3997 | |
3998 | bfd_boolean | |
7fa3d080 | 3999 | is_alt_relocation (int r_type) |
43cd72b9 BW |
4000 | { |
4001 | return (r_type >= R_XTENSA_SLOT0_ALT | |
4002 | && r_type <= R_XTENSA_SLOT14_ALT); | |
e0001a05 NC |
4003 | } |
4004 | ||
4005 | ||
43cd72b9 | 4006 | bfd_boolean |
7fa3d080 | 4007 | is_operand_relocation (int r_type) |
e0001a05 | 4008 | { |
43cd72b9 BW |
4009 | switch (r_type) |
4010 | { | |
4011 | case R_XTENSA_OP0: | |
4012 | case R_XTENSA_OP1: | |
4013 | case R_XTENSA_OP2: | |
4014 | return TRUE; | |
e0001a05 | 4015 | |
43cd72b9 BW |
4016 | default: |
4017 | if (r_type >= R_XTENSA_SLOT0_OP && r_type <= R_XTENSA_SLOT14_OP) | |
4018 | return TRUE; | |
4019 | if (r_type >= R_XTENSA_SLOT0_ALT && r_type <= R_XTENSA_SLOT14_ALT) | |
4020 | return TRUE; | |
4021 | break; | |
4022 | } | |
e0001a05 | 4023 | |
43cd72b9 | 4024 | return FALSE; |
e0001a05 NC |
4025 | } |
4026 | ||
68ffbac6 | 4027 | |
43cd72b9 | 4028 | #define MIN_INSN_LENGTH 2 |
e0001a05 | 4029 | |
43cd72b9 BW |
4030 | /* Return 0 if it fails to decode. */ |
4031 | ||
4032 | bfd_size_type | |
7fa3d080 BW |
4033 | insn_decode_len (bfd_byte *contents, |
4034 | bfd_size_type content_len, | |
4035 | bfd_size_type offset) | |
e0001a05 | 4036 | { |
43cd72b9 BW |
4037 | int insn_len; |
4038 | xtensa_isa isa = xtensa_default_isa; | |
4039 | xtensa_format fmt; | |
4040 | static xtensa_insnbuf ibuff = NULL; | |
e0001a05 | 4041 | |
43cd72b9 BW |
4042 | if (offset + MIN_INSN_LENGTH > content_len) |
4043 | return 0; | |
e0001a05 | 4044 | |
43cd72b9 BW |
4045 | if (ibuff == NULL) |
4046 | ibuff = xtensa_insnbuf_alloc (isa); | |
4047 | xtensa_insnbuf_from_chars (isa, ibuff, &contents[offset], | |
4048 | content_len - offset); | |
4049 | fmt = xtensa_format_decode (isa, ibuff); | |
4050 | if (fmt == XTENSA_UNDEFINED) | |
4051 | return 0; | |
4052 | insn_len = xtensa_format_length (isa, fmt); | |
4053 | if (insn_len == XTENSA_UNDEFINED) | |
4054 | return 0; | |
4055 | return insn_len; | |
e0001a05 NC |
4056 | } |
4057 | ||
4058 | ||
43cd72b9 BW |
4059 | /* Decode the opcode for a single slot instruction. |
4060 | Return 0 if it fails to decode or the instruction is multi-slot. */ | |
e0001a05 | 4061 | |
43cd72b9 | 4062 | xtensa_opcode |
7fa3d080 BW |
4063 | insn_decode_opcode (bfd_byte *contents, |
4064 | bfd_size_type content_len, | |
4065 | bfd_size_type offset, | |
4066 | int slot) | |
e0001a05 | 4067 | { |
e0001a05 | 4068 | xtensa_isa isa = xtensa_default_isa; |
43cd72b9 BW |
4069 | xtensa_format fmt; |
4070 | static xtensa_insnbuf insnbuf = NULL; | |
4071 | static xtensa_insnbuf slotbuf = NULL; | |
4072 | ||
4073 | if (offset + MIN_INSN_LENGTH > content_len) | |
e0001a05 NC |
4074 | return XTENSA_UNDEFINED; |
4075 | ||
4076 | if (insnbuf == NULL) | |
43cd72b9 BW |
4077 | { |
4078 | insnbuf = xtensa_insnbuf_alloc (isa); | |
4079 | slotbuf = xtensa_insnbuf_alloc (isa); | |
4080 | } | |
4081 | ||
4082 | xtensa_insnbuf_from_chars (isa, insnbuf, &contents[offset], | |
4083 | content_len - offset); | |
4084 | fmt = xtensa_format_decode (isa, insnbuf); | |
4085 | if (fmt == XTENSA_UNDEFINED) | |
e0001a05 | 4086 | return XTENSA_UNDEFINED; |
43cd72b9 BW |
4087 | |
4088 | if (slot >= xtensa_format_num_slots (isa, fmt)) | |
e0001a05 | 4089 | return XTENSA_UNDEFINED; |
e0001a05 | 4090 | |
43cd72b9 BW |
4091 | xtensa_format_get_slot (isa, fmt, slot, insnbuf, slotbuf); |
4092 | return xtensa_opcode_decode (isa, fmt, slot, slotbuf); | |
4093 | } | |
e0001a05 | 4094 | |
e0001a05 | 4095 | |
43cd72b9 BW |
4096 | /* The offset is the offset in the contents. |
4097 | The address is the address of that offset. */ | |
e0001a05 | 4098 | |
43cd72b9 | 4099 | static bfd_boolean |
7fa3d080 BW |
4100 | check_branch_target_aligned (bfd_byte *contents, |
4101 | bfd_size_type content_length, | |
4102 | bfd_vma offset, | |
4103 | bfd_vma address) | |
43cd72b9 BW |
4104 | { |
4105 | bfd_size_type insn_len = insn_decode_len (contents, content_length, offset); | |
4106 | if (insn_len == 0) | |
4107 | return FALSE; | |
4108 | return check_branch_target_aligned_address (address, insn_len); | |
4109 | } | |
e0001a05 | 4110 | |
e0001a05 | 4111 | |
43cd72b9 | 4112 | static bfd_boolean |
7fa3d080 BW |
4113 | check_loop_aligned (bfd_byte *contents, |
4114 | bfd_size_type content_length, | |
4115 | bfd_vma offset, | |
4116 | bfd_vma address) | |
e0001a05 | 4117 | { |
43cd72b9 | 4118 | bfd_size_type loop_len, insn_len; |
64b607e6 | 4119 | xtensa_opcode opcode; |
e0001a05 | 4120 | |
64b607e6 BW |
4121 | opcode = insn_decode_opcode (contents, content_length, offset, 0); |
4122 | if (opcode == XTENSA_UNDEFINED | |
4123 | || xtensa_opcode_is_loop (xtensa_default_isa, opcode) != 1) | |
4124 | { | |
4125 | BFD_ASSERT (FALSE); | |
4126 | return FALSE; | |
4127 | } | |
68ffbac6 | 4128 | |
43cd72b9 | 4129 | loop_len = insn_decode_len (contents, content_length, offset); |
43cd72b9 | 4130 | insn_len = insn_decode_len (contents, content_length, offset + loop_len); |
64b607e6 BW |
4131 | if (loop_len == 0 || insn_len == 0) |
4132 | { | |
4133 | BFD_ASSERT (FALSE); | |
4134 | return FALSE; | |
4135 | } | |
e0001a05 | 4136 | |
43cd72b9 BW |
4137 | return check_branch_target_aligned_address (address + loop_len, insn_len); |
4138 | } | |
e0001a05 | 4139 | |
e0001a05 NC |
4140 | |
4141 | static bfd_boolean | |
7fa3d080 | 4142 | check_branch_target_aligned_address (bfd_vma addr, int len) |
e0001a05 | 4143 | { |
43cd72b9 BW |
4144 | if (len == 8) |
4145 | return (addr % 8 == 0); | |
4146 | return ((addr >> 2) == ((addr + len - 1) >> 2)); | |
e0001a05 NC |
4147 | } |
4148 | ||
43cd72b9 BW |
4149 | \f |
4150 | /* Instruction widening and narrowing. */ | |
e0001a05 | 4151 | |
7fa3d080 BW |
4152 | /* When FLIX is available we need to access certain instructions only |
4153 | when they are 16-bit or 24-bit instructions. This table caches | |
4154 | information about such instructions by walking through all the | |
4155 | opcodes and finding the smallest single-slot format into which each | |
4156 | can be encoded. */ | |
4157 | ||
4158 | static xtensa_format *op_single_fmt_table = NULL; | |
e0001a05 NC |
4159 | |
4160 | ||
7fa3d080 BW |
4161 | static void |
4162 | init_op_single_format_table (void) | |
e0001a05 | 4163 | { |
7fa3d080 BW |
4164 | xtensa_isa isa = xtensa_default_isa; |
4165 | xtensa_insnbuf ibuf; | |
4166 | xtensa_opcode opcode; | |
4167 | xtensa_format fmt; | |
4168 | int num_opcodes; | |
4169 | ||
4170 | if (op_single_fmt_table) | |
4171 | return; | |
4172 | ||
4173 | ibuf = xtensa_insnbuf_alloc (isa); | |
4174 | num_opcodes = xtensa_isa_num_opcodes (isa); | |
4175 | ||
4176 | op_single_fmt_table = (xtensa_format *) | |
4177 | bfd_malloc (sizeof (xtensa_format) * num_opcodes); | |
4178 | for (opcode = 0; opcode < num_opcodes; opcode++) | |
4179 | { | |
4180 | op_single_fmt_table[opcode] = XTENSA_UNDEFINED; | |
4181 | for (fmt = 0; fmt < xtensa_isa_num_formats (isa); fmt++) | |
4182 | { | |
4183 | if (xtensa_format_num_slots (isa, fmt) == 1 | |
4184 | && xtensa_opcode_encode (isa, fmt, 0, ibuf, opcode) == 0) | |
4185 | { | |
4186 | xtensa_opcode old_fmt = op_single_fmt_table[opcode]; | |
4187 | int fmt_length = xtensa_format_length (isa, fmt); | |
4188 | if (old_fmt == XTENSA_UNDEFINED | |
4189 | || fmt_length < xtensa_format_length (isa, old_fmt)) | |
4190 | op_single_fmt_table[opcode] = fmt; | |
4191 | } | |
4192 | } | |
4193 | } | |
4194 | xtensa_insnbuf_free (isa, ibuf); | |
4195 | } | |
4196 | ||
4197 | ||
4198 | static xtensa_format | |
4199 | get_single_format (xtensa_opcode opcode) | |
4200 | { | |
4201 | init_op_single_format_table (); | |
4202 | return op_single_fmt_table[opcode]; | |
4203 | } | |
e0001a05 | 4204 | |
e0001a05 | 4205 | |
43cd72b9 BW |
4206 | /* For the set of narrowable instructions we do NOT include the |
4207 | narrowings beqz -> beqz.n or bnez -> bnez.n because of complexities | |
4208 | involved during linker relaxation that may require these to | |
4209 | re-expand in some conditions. Also, the narrowing "or" -> mov.n | |
4210 | requires special case code to ensure it only works when op1 == op2. */ | |
e0001a05 | 4211 | |
7fa3d080 BW |
4212 | struct string_pair |
4213 | { | |
4214 | const char *wide; | |
4215 | const char *narrow; | |
4216 | }; | |
4217 | ||
43cd72b9 | 4218 | struct string_pair narrowable[] = |
e0001a05 | 4219 | { |
43cd72b9 BW |
4220 | { "add", "add.n" }, |
4221 | { "addi", "addi.n" }, | |
4222 | { "addmi", "addi.n" }, | |
4223 | { "l32i", "l32i.n" }, | |
4224 | { "movi", "movi.n" }, | |
4225 | { "ret", "ret.n" }, | |
4226 | { "retw", "retw.n" }, | |
4227 | { "s32i", "s32i.n" }, | |
4228 | { "or", "mov.n" } /* special case only when op1 == op2 */ | |
4229 | }; | |
e0001a05 | 4230 | |
43cd72b9 | 4231 | struct string_pair widenable[] = |
e0001a05 | 4232 | { |
43cd72b9 BW |
4233 | { "add", "add.n" }, |
4234 | { "addi", "addi.n" }, | |
4235 | { "addmi", "addi.n" }, | |
4236 | { "beqz", "beqz.n" }, | |
4237 | { "bnez", "bnez.n" }, | |
4238 | { "l32i", "l32i.n" }, | |
4239 | { "movi", "movi.n" }, | |
4240 | { "ret", "ret.n" }, | |
4241 | { "retw", "retw.n" }, | |
4242 | { "s32i", "s32i.n" }, | |
4243 | { "or", "mov.n" } /* special case only when op1 == op2 */ | |
4244 | }; | |
e0001a05 NC |
4245 | |
4246 | ||
64b607e6 BW |
4247 | /* Check if an instruction can be "narrowed", i.e., changed from a standard |
4248 | 3-byte instruction to a 2-byte "density" instruction. If it is valid, | |
4249 | return the instruction buffer holding the narrow instruction. Otherwise, | |
4250 | return 0. The set of valid narrowing are specified by a string table | |
43cd72b9 BW |
4251 | but require some special case operand checks in some cases. */ |
4252 | ||
64b607e6 BW |
4253 | static xtensa_insnbuf |
4254 | can_narrow_instruction (xtensa_insnbuf slotbuf, | |
4255 | xtensa_format fmt, | |
4256 | xtensa_opcode opcode) | |
e0001a05 | 4257 | { |
43cd72b9 | 4258 | xtensa_isa isa = xtensa_default_isa; |
64b607e6 BW |
4259 | xtensa_format o_fmt; |
4260 | unsigned opi; | |
e0001a05 | 4261 | |
43cd72b9 BW |
4262 | static xtensa_insnbuf o_insnbuf = NULL; |
4263 | static xtensa_insnbuf o_slotbuf = NULL; | |
e0001a05 | 4264 | |
64b607e6 | 4265 | if (o_insnbuf == NULL) |
43cd72b9 | 4266 | { |
43cd72b9 BW |
4267 | o_insnbuf = xtensa_insnbuf_alloc (isa); |
4268 | o_slotbuf = xtensa_insnbuf_alloc (isa); | |
4269 | } | |
e0001a05 | 4270 | |
64b607e6 | 4271 | for (opi = 0; opi < (sizeof (narrowable)/sizeof (struct string_pair)); opi++) |
43cd72b9 BW |
4272 | { |
4273 | bfd_boolean is_or = (strcmp ("or", narrowable[opi].wide) == 0); | |
e0001a05 | 4274 | |
43cd72b9 BW |
4275 | if (opcode == xtensa_opcode_lookup (isa, narrowable[opi].wide)) |
4276 | { | |
4277 | uint32 value, newval; | |
4278 | int i, operand_count, o_operand_count; | |
4279 | xtensa_opcode o_opcode; | |
e0001a05 | 4280 | |
43cd72b9 BW |
4281 | /* Address does not matter in this case. We might need to |
4282 | fix it to handle branches/jumps. */ | |
4283 | bfd_vma self_address = 0; | |
e0001a05 | 4284 | |
43cd72b9 BW |
4285 | o_opcode = xtensa_opcode_lookup (isa, narrowable[opi].narrow); |
4286 | if (o_opcode == XTENSA_UNDEFINED) | |
64b607e6 | 4287 | return 0; |
43cd72b9 BW |
4288 | o_fmt = get_single_format (o_opcode); |
4289 | if (o_fmt == XTENSA_UNDEFINED) | |
64b607e6 | 4290 | return 0; |
e0001a05 | 4291 | |
43cd72b9 BW |
4292 | if (xtensa_format_length (isa, fmt) != 3 |
4293 | || xtensa_format_length (isa, o_fmt) != 2) | |
64b607e6 | 4294 | return 0; |
e0001a05 | 4295 | |
43cd72b9 BW |
4296 | xtensa_format_encode (isa, o_fmt, o_insnbuf); |
4297 | operand_count = xtensa_opcode_num_operands (isa, opcode); | |
4298 | o_operand_count = xtensa_opcode_num_operands (isa, o_opcode); | |
e0001a05 | 4299 | |
43cd72b9 | 4300 | if (xtensa_opcode_encode (isa, o_fmt, 0, o_slotbuf, o_opcode) != 0) |
64b607e6 | 4301 | return 0; |
e0001a05 | 4302 | |
43cd72b9 BW |
4303 | if (!is_or) |
4304 | { | |
4305 | if (xtensa_opcode_num_operands (isa, o_opcode) != operand_count) | |
64b607e6 | 4306 | return 0; |
43cd72b9 BW |
4307 | } |
4308 | else | |
4309 | { | |
4310 | uint32 rawval0, rawval1, rawval2; | |
e0001a05 | 4311 | |
64b607e6 BW |
4312 | if (o_operand_count + 1 != operand_count |
4313 | || xtensa_operand_get_field (isa, opcode, 0, | |
4314 | fmt, 0, slotbuf, &rawval0) != 0 | |
4315 | || xtensa_operand_get_field (isa, opcode, 1, | |
4316 | fmt, 0, slotbuf, &rawval1) != 0 | |
4317 | || xtensa_operand_get_field (isa, opcode, 2, | |
4318 | fmt, 0, slotbuf, &rawval2) != 0 | |
4319 | || rawval1 != rawval2 | |
4320 | || rawval0 == rawval1 /* it is a nop */) | |
4321 | return 0; | |
43cd72b9 | 4322 | } |
e0001a05 | 4323 | |
43cd72b9 BW |
4324 | for (i = 0; i < o_operand_count; ++i) |
4325 | { | |
4326 | if (xtensa_operand_get_field (isa, opcode, i, fmt, 0, | |
4327 | slotbuf, &value) | |
4328 | || xtensa_operand_decode (isa, opcode, i, &value)) | |
64b607e6 | 4329 | return 0; |
e0001a05 | 4330 | |
43cd72b9 BW |
4331 | /* PC-relative branches need adjustment, but |
4332 | the PC-rel operand will always have a relocation. */ | |
4333 | newval = value; | |
4334 | if (xtensa_operand_do_reloc (isa, o_opcode, i, &newval, | |
4335 | self_address) | |
4336 | || xtensa_operand_encode (isa, o_opcode, i, &newval) | |
4337 | || xtensa_operand_set_field (isa, o_opcode, i, o_fmt, 0, | |
4338 | o_slotbuf, newval)) | |
64b607e6 | 4339 | return 0; |
43cd72b9 | 4340 | } |
e0001a05 | 4341 | |
64b607e6 BW |
4342 | if (xtensa_format_set_slot (isa, o_fmt, 0, o_insnbuf, o_slotbuf)) |
4343 | return 0; | |
e0001a05 | 4344 | |
64b607e6 | 4345 | return o_insnbuf; |
43cd72b9 BW |
4346 | } |
4347 | } | |
64b607e6 | 4348 | return 0; |
43cd72b9 | 4349 | } |
e0001a05 | 4350 | |
e0001a05 | 4351 | |
64b607e6 BW |
4352 | /* Attempt to narrow an instruction. If the narrowing is valid, perform |
4353 | the action in-place directly into the contents and return TRUE. Otherwise, | |
4354 | the return value is FALSE and the contents are not modified. */ | |
e0001a05 | 4355 | |
43cd72b9 | 4356 | static bfd_boolean |
64b607e6 BW |
4357 | narrow_instruction (bfd_byte *contents, |
4358 | bfd_size_type content_length, | |
4359 | bfd_size_type offset) | |
e0001a05 | 4360 | { |
43cd72b9 | 4361 | xtensa_opcode opcode; |
64b607e6 | 4362 | bfd_size_type insn_len; |
43cd72b9 | 4363 | xtensa_isa isa = xtensa_default_isa; |
64b607e6 BW |
4364 | xtensa_format fmt; |
4365 | xtensa_insnbuf o_insnbuf; | |
e0001a05 | 4366 | |
43cd72b9 BW |
4367 | static xtensa_insnbuf insnbuf = NULL; |
4368 | static xtensa_insnbuf slotbuf = NULL; | |
e0001a05 | 4369 | |
43cd72b9 BW |
4370 | if (insnbuf == NULL) |
4371 | { | |
4372 | insnbuf = xtensa_insnbuf_alloc (isa); | |
4373 | slotbuf = xtensa_insnbuf_alloc (isa); | |
43cd72b9 | 4374 | } |
e0001a05 | 4375 | |
43cd72b9 | 4376 | BFD_ASSERT (offset < content_length); |
2c8c90bc | 4377 | |
43cd72b9 | 4378 | if (content_length < 2) |
e0001a05 NC |
4379 | return FALSE; |
4380 | ||
64b607e6 | 4381 | /* We will hand-code a few of these for a little while. |
43cd72b9 BW |
4382 | These have all been specified in the assembler aleady. */ |
4383 | xtensa_insnbuf_from_chars (isa, insnbuf, &contents[offset], | |
4384 | content_length - offset); | |
4385 | fmt = xtensa_format_decode (isa, insnbuf); | |
4386 | if (xtensa_format_num_slots (isa, fmt) != 1) | |
e0001a05 NC |
4387 | return FALSE; |
4388 | ||
43cd72b9 | 4389 | if (xtensa_format_get_slot (isa, fmt, 0, insnbuf, slotbuf) != 0) |
e0001a05 NC |
4390 | return FALSE; |
4391 | ||
43cd72b9 BW |
4392 | opcode = xtensa_opcode_decode (isa, fmt, 0, slotbuf); |
4393 | if (opcode == XTENSA_UNDEFINED) | |
e0001a05 | 4394 | return FALSE; |
43cd72b9 BW |
4395 | insn_len = xtensa_format_length (isa, fmt); |
4396 | if (insn_len > content_length) | |
4397 | return FALSE; | |
4398 | ||
64b607e6 BW |
4399 | o_insnbuf = can_narrow_instruction (slotbuf, fmt, opcode); |
4400 | if (o_insnbuf) | |
4401 | { | |
4402 | xtensa_insnbuf_to_chars (isa, o_insnbuf, contents + offset, | |
4403 | content_length - offset); | |
4404 | return TRUE; | |
4405 | } | |
4406 | ||
4407 | return FALSE; | |
4408 | } | |
4409 | ||
4410 | ||
4411 | /* Check if an instruction can be "widened", i.e., changed from a 2-byte | |
4412 | "density" instruction to a standard 3-byte instruction. If it is valid, | |
4413 | return the instruction buffer holding the wide instruction. Otherwise, | |
4414 | return 0. The set of valid widenings are specified by a string table | |
4415 | but require some special case operand checks in some cases. */ | |
4416 | ||
4417 | static xtensa_insnbuf | |
4418 | can_widen_instruction (xtensa_insnbuf slotbuf, | |
4419 | xtensa_format fmt, | |
4420 | xtensa_opcode opcode) | |
4421 | { | |
4422 | xtensa_isa isa = xtensa_default_isa; | |
4423 | xtensa_format o_fmt; | |
4424 | unsigned opi; | |
4425 | ||
4426 | static xtensa_insnbuf o_insnbuf = NULL; | |
4427 | static xtensa_insnbuf o_slotbuf = NULL; | |
4428 | ||
4429 | if (o_insnbuf == NULL) | |
4430 | { | |
4431 | o_insnbuf = xtensa_insnbuf_alloc (isa); | |
4432 | o_slotbuf = xtensa_insnbuf_alloc (isa); | |
4433 | } | |
4434 | ||
4435 | for (opi = 0; opi < (sizeof (widenable)/sizeof (struct string_pair)); opi++) | |
e0001a05 | 4436 | { |
43cd72b9 BW |
4437 | bfd_boolean is_or = (strcmp ("or", widenable[opi].wide) == 0); |
4438 | bfd_boolean is_branch = (strcmp ("beqz", widenable[opi].wide) == 0 | |
4439 | || strcmp ("bnez", widenable[opi].wide) == 0); | |
e0001a05 | 4440 | |
43cd72b9 BW |
4441 | if (opcode == xtensa_opcode_lookup (isa, widenable[opi].narrow)) |
4442 | { | |
4443 | uint32 value, newval; | |
4444 | int i, operand_count, o_operand_count, check_operand_count; | |
4445 | xtensa_opcode o_opcode; | |
e0001a05 | 4446 | |
43cd72b9 BW |
4447 | /* Address does not matter in this case. We might need to fix it |
4448 | to handle branches/jumps. */ | |
4449 | bfd_vma self_address = 0; | |
e0001a05 | 4450 | |
43cd72b9 BW |
4451 | o_opcode = xtensa_opcode_lookup (isa, widenable[opi].wide); |
4452 | if (o_opcode == XTENSA_UNDEFINED) | |
64b607e6 | 4453 | return 0; |
43cd72b9 BW |
4454 | o_fmt = get_single_format (o_opcode); |
4455 | if (o_fmt == XTENSA_UNDEFINED) | |
64b607e6 | 4456 | return 0; |
e0001a05 | 4457 | |
43cd72b9 BW |
4458 | if (xtensa_format_length (isa, fmt) != 2 |
4459 | || xtensa_format_length (isa, o_fmt) != 3) | |
64b607e6 | 4460 | return 0; |
e0001a05 | 4461 | |
43cd72b9 BW |
4462 | xtensa_format_encode (isa, o_fmt, o_insnbuf); |
4463 | operand_count = xtensa_opcode_num_operands (isa, opcode); | |
4464 | o_operand_count = xtensa_opcode_num_operands (isa, o_opcode); | |
4465 | check_operand_count = o_operand_count; | |
e0001a05 | 4466 | |
43cd72b9 | 4467 | if (xtensa_opcode_encode (isa, o_fmt, 0, o_slotbuf, o_opcode) != 0) |
64b607e6 | 4468 | return 0; |
e0001a05 | 4469 | |
43cd72b9 BW |
4470 | if (!is_or) |
4471 | { | |
4472 | if (xtensa_opcode_num_operands (isa, o_opcode) != operand_count) | |
64b607e6 | 4473 | return 0; |
43cd72b9 BW |
4474 | } |
4475 | else | |
4476 | { | |
4477 | uint32 rawval0, rawval1; | |
4478 | ||
64b607e6 BW |
4479 | if (o_operand_count != operand_count + 1 |
4480 | || xtensa_operand_get_field (isa, opcode, 0, | |
4481 | fmt, 0, slotbuf, &rawval0) != 0 | |
4482 | || xtensa_operand_get_field (isa, opcode, 1, | |
4483 | fmt, 0, slotbuf, &rawval1) != 0 | |
4484 | || rawval0 == rawval1 /* it is a nop */) | |
4485 | return 0; | |
43cd72b9 BW |
4486 | } |
4487 | if (is_branch) | |
4488 | check_operand_count--; | |
4489 | ||
64b607e6 | 4490 | for (i = 0; i < check_operand_count; i++) |
43cd72b9 BW |
4491 | { |
4492 | int new_i = i; | |
4493 | if (is_or && i == o_operand_count - 1) | |
4494 | new_i = i - 1; | |
4495 | if (xtensa_operand_get_field (isa, opcode, new_i, fmt, 0, | |
4496 | slotbuf, &value) | |
4497 | || xtensa_operand_decode (isa, opcode, new_i, &value)) | |
64b607e6 | 4498 | return 0; |
43cd72b9 BW |
4499 | |
4500 | /* PC-relative branches need adjustment, but | |
4501 | the PC-rel operand will always have a relocation. */ | |
4502 | newval = value; | |
4503 | if (xtensa_operand_do_reloc (isa, o_opcode, i, &newval, | |
4504 | self_address) | |
4505 | || xtensa_operand_encode (isa, o_opcode, i, &newval) | |
4506 | || xtensa_operand_set_field (isa, o_opcode, i, o_fmt, 0, | |
4507 | o_slotbuf, newval)) | |
64b607e6 | 4508 | return 0; |
43cd72b9 BW |
4509 | } |
4510 | ||
4511 | if (xtensa_format_set_slot (isa, o_fmt, 0, o_insnbuf, o_slotbuf)) | |
64b607e6 | 4512 | return 0; |
43cd72b9 | 4513 | |
64b607e6 | 4514 | return o_insnbuf; |
43cd72b9 BW |
4515 | } |
4516 | } | |
64b607e6 BW |
4517 | return 0; |
4518 | } | |
4519 | ||
68ffbac6 | 4520 | |
64b607e6 BW |
4521 | /* Attempt to widen an instruction. If the widening is valid, perform |
4522 | the action in-place directly into the contents and return TRUE. Otherwise, | |
4523 | the return value is FALSE and the contents are not modified. */ | |
4524 | ||
4525 | static bfd_boolean | |
4526 | widen_instruction (bfd_byte *contents, | |
4527 | bfd_size_type content_length, | |
4528 | bfd_size_type offset) | |
4529 | { | |
4530 | xtensa_opcode opcode; | |
4531 | bfd_size_type insn_len; | |
4532 | xtensa_isa isa = xtensa_default_isa; | |
4533 | xtensa_format fmt; | |
4534 | xtensa_insnbuf o_insnbuf; | |
4535 | ||
4536 | static xtensa_insnbuf insnbuf = NULL; | |
4537 | static xtensa_insnbuf slotbuf = NULL; | |
4538 | ||
4539 | if (insnbuf == NULL) | |
4540 | { | |
4541 | insnbuf = xtensa_insnbuf_alloc (isa); | |
4542 | slotbuf = xtensa_insnbuf_alloc (isa); | |
4543 | } | |
4544 | ||
4545 | BFD_ASSERT (offset < content_length); | |
4546 | ||
4547 | if (content_length < 2) | |
4548 | return FALSE; | |
4549 | ||
4550 | /* We will hand-code a few of these for a little while. | |
4551 | These have all been specified in the assembler aleady. */ | |
4552 | xtensa_insnbuf_from_chars (isa, insnbuf, &contents[offset], | |
4553 | content_length - offset); | |
4554 | fmt = xtensa_format_decode (isa, insnbuf); | |
4555 | if (xtensa_format_num_slots (isa, fmt) != 1) | |
4556 | return FALSE; | |
4557 | ||
4558 | if (xtensa_format_get_slot (isa, fmt, 0, insnbuf, slotbuf) != 0) | |
4559 | return FALSE; | |
4560 | ||
4561 | opcode = xtensa_opcode_decode (isa, fmt, 0, slotbuf); | |
4562 | if (opcode == XTENSA_UNDEFINED) | |
4563 | return FALSE; | |
4564 | insn_len = xtensa_format_length (isa, fmt); | |
4565 | if (insn_len > content_length) | |
4566 | return FALSE; | |
4567 | ||
4568 | o_insnbuf = can_widen_instruction (slotbuf, fmt, opcode); | |
4569 | if (o_insnbuf) | |
4570 | { | |
4571 | xtensa_insnbuf_to_chars (isa, o_insnbuf, contents + offset, | |
4572 | content_length - offset); | |
4573 | return TRUE; | |
4574 | } | |
43cd72b9 | 4575 | return FALSE; |
e0001a05 NC |
4576 | } |
4577 | ||
43cd72b9 BW |
4578 | \f |
4579 | /* Code for transforming CALLs at link-time. */ | |
e0001a05 | 4580 | |
43cd72b9 | 4581 | static bfd_reloc_status_type |
7fa3d080 BW |
4582 | elf_xtensa_do_asm_simplify (bfd_byte *contents, |
4583 | bfd_vma address, | |
4584 | bfd_vma content_length, | |
4585 | char **error_message) | |
e0001a05 | 4586 | { |
43cd72b9 BW |
4587 | static xtensa_insnbuf insnbuf = NULL; |
4588 | static xtensa_insnbuf slotbuf = NULL; | |
4589 | xtensa_format core_format = XTENSA_UNDEFINED; | |
4590 | xtensa_opcode opcode; | |
4591 | xtensa_opcode direct_call_opcode; | |
4592 | xtensa_isa isa = xtensa_default_isa; | |
4593 | bfd_byte *chbuf = contents + address; | |
4594 | int opn; | |
e0001a05 | 4595 | |
43cd72b9 | 4596 | if (insnbuf == NULL) |
e0001a05 | 4597 | { |
43cd72b9 BW |
4598 | insnbuf = xtensa_insnbuf_alloc (isa); |
4599 | slotbuf = xtensa_insnbuf_alloc (isa); | |
e0001a05 | 4600 | } |
e0001a05 | 4601 | |
43cd72b9 BW |
4602 | if (content_length < address) |
4603 | { | |
38f14ab8 | 4604 | *error_message = _("attempt to convert L32R/CALLX to CALL failed"); |
43cd72b9 BW |
4605 | return bfd_reloc_other; |
4606 | } | |
e0001a05 | 4607 | |
43cd72b9 BW |
4608 | opcode = get_expanded_call_opcode (chbuf, content_length - address, 0); |
4609 | direct_call_opcode = swap_callx_for_call_opcode (opcode); | |
4610 | if (direct_call_opcode == XTENSA_UNDEFINED) | |
4611 | { | |
38f14ab8 | 4612 | *error_message = _("attempt to convert L32R/CALLX to CALL failed"); |
43cd72b9 BW |
4613 | return bfd_reloc_other; |
4614 | } | |
68ffbac6 | 4615 | |
43cd72b9 BW |
4616 | /* Assemble a NOP ("or a1, a1, a1") into the 0 byte offset. */ |
4617 | core_format = xtensa_format_lookup (isa, "x24"); | |
4618 | opcode = xtensa_opcode_lookup (isa, "or"); | |
4619 | xtensa_opcode_encode (isa, core_format, 0, slotbuf, opcode); | |
68ffbac6 | 4620 | for (opn = 0; opn < 3; opn++) |
43cd72b9 BW |
4621 | { |
4622 | uint32 regno = 1; | |
4623 | xtensa_operand_encode (isa, opcode, opn, ®no); | |
4624 | xtensa_operand_set_field (isa, opcode, opn, core_format, 0, | |
4625 | slotbuf, regno); | |
4626 | } | |
4627 | xtensa_format_encode (isa, core_format, insnbuf); | |
4628 | xtensa_format_set_slot (isa, core_format, 0, insnbuf, slotbuf); | |
4629 | xtensa_insnbuf_to_chars (isa, insnbuf, chbuf, content_length - address); | |
e0001a05 | 4630 | |
43cd72b9 BW |
4631 | /* Assemble a CALL ("callN 0") into the 3 byte offset. */ |
4632 | xtensa_opcode_encode (isa, core_format, 0, slotbuf, direct_call_opcode); | |
4633 | xtensa_operand_set_field (isa, opcode, 0, core_format, 0, slotbuf, 0); | |
e0001a05 | 4634 | |
43cd72b9 BW |
4635 | xtensa_format_encode (isa, core_format, insnbuf); |
4636 | xtensa_format_set_slot (isa, core_format, 0, insnbuf, slotbuf); | |
4637 | xtensa_insnbuf_to_chars (isa, insnbuf, chbuf + 3, | |
4638 | content_length - address - 3); | |
e0001a05 | 4639 | |
43cd72b9 BW |
4640 | return bfd_reloc_ok; |
4641 | } | |
e0001a05 | 4642 | |
e0001a05 | 4643 | |
43cd72b9 | 4644 | static bfd_reloc_status_type |
7fa3d080 BW |
4645 | contract_asm_expansion (bfd_byte *contents, |
4646 | bfd_vma content_length, | |
4647 | Elf_Internal_Rela *irel, | |
4648 | char **error_message) | |
43cd72b9 BW |
4649 | { |
4650 | bfd_reloc_status_type retval = | |
4651 | elf_xtensa_do_asm_simplify (contents, irel->r_offset, content_length, | |
4652 | error_message); | |
e0001a05 | 4653 | |
43cd72b9 BW |
4654 | if (retval != bfd_reloc_ok) |
4655 | return bfd_reloc_dangerous; | |
e0001a05 | 4656 | |
43cd72b9 BW |
4657 | /* Update the irel->r_offset field so that the right immediate and |
4658 | the right instruction are modified during the relocation. */ | |
4659 | irel->r_offset += 3; | |
4660 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), R_XTENSA_SLOT0_OP); | |
4661 | return bfd_reloc_ok; | |
4662 | } | |
e0001a05 | 4663 | |
e0001a05 | 4664 | |
43cd72b9 | 4665 | static xtensa_opcode |
7fa3d080 | 4666 | swap_callx_for_call_opcode (xtensa_opcode opcode) |
e0001a05 | 4667 | { |
43cd72b9 | 4668 | init_call_opcodes (); |
e0001a05 | 4669 | |
43cd72b9 BW |
4670 | if (opcode == callx0_op) return call0_op; |
4671 | if (opcode == callx4_op) return call4_op; | |
4672 | if (opcode == callx8_op) return call8_op; | |
4673 | if (opcode == callx12_op) return call12_op; | |
e0001a05 | 4674 | |
43cd72b9 BW |
4675 | /* Return XTENSA_UNDEFINED if the opcode is not an indirect call. */ |
4676 | return XTENSA_UNDEFINED; | |
4677 | } | |
e0001a05 | 4678 | |
e0001a05 | 4679 | |
43cd72b9 BW |
4680 | /* Check if "buf" is pointing to a "L32R aN; CALLX aN" or "CONST16 aN; |
4681 | CONST16 aN; CALLX aN" sequence, and if so, return the CALLX opcode. | |
4682 | If not, return XTENSA_UNDEFINED. */ | |
e0001a05 | 4683 | |
43cd72b9 BW |
4684 | #define L32R_TARGET_REG_OPERAND 0 |
4685 | #define CONST16_TARGET_REG_OPERAND 0 | |
4686 | #define CALLN_SOURCE_OPERAND 0 | |
e0001a05 | 4687 | |
68ffbac6 | 4688 | static xtensa_opcode |
7fa3d080 | 4689 | get_expanded_call_opcode (bfd_byte *buf, int bufsize, bfd_boolean *p_uses_l32r) |
e0001a05 | 4690 | { |
43cd72b9 BW |
4691 | static xtensa_insnbuf insnbuf = NULL; |
4692 | static xtensa_insnbuf slotbuf = NULL; | |
4693 | xtensa_format fmt; | |
4694 | xtensa_opcode opcode; | |
4695 | xtensa_isa isa = xtensa_default_isa; | |
4696 | uint32 regno, const16_regno, call_regno; | |
4697 | int offset = 0; | |
e0001a05 | 4698 | |
43cd72b9 | 4699 | if (insnbuf == NULL) |
e0001a05 | 4700 | { |
43cd72b9 BW |
4701 | insnbuf = xtensa_insnbuf_alloc (isa); |
4702 | slotbuf = xtensa_insnbuf_alloc (isa); | |
e0001a05 | 4703 | } |
43cd72b9 BW |
4704 | |
4705 | xtensa_insnbuf_from_chars (isa, insnbuf, buf, bufsize); | |
4706 | fmt = xtensa_format_decode (isa, insnbuf); | |
4707 | if (fmt == XTENSA_UNDEFINED | |
4708 | || xtensa_format_get_slot (isa, fmt, 0, insnbuf, slotbuf)) | |
4709 | return XTENSA_UNDEFINED; | |
4710 | ||
4711 | opcode = xtensa_opcode_decode (isa, fmt, 0, slotbuf); | |
4712 | if (opcode == XTENSA_UNDEFINED) | |
4713 | return XTENSA_UNDEFINED; | |
4714 | ||
4715 | if (opcode == get_l32r_opcode ()) | |
e0001a05 | 4716 | { |
43cd72b9 BW |
4717 | if (p_uses_l32r) |
4718 | *p_uses_l32r = TRUE; | |
4719 | if (xtensa_operand_get_field (isa, opcode, L32R_TARGET_REG_OPERAND, | |
4720 | fmt, 0, slotbuf, ®no) | |
4721 | || xtensa_operand_decode (isa, opcode, L32R_TARGET_REG_OPERAND, | |
4722 | ®no)) | |
4723 | return XTENSA_UNDEFINED; | |
e0001a05 | 4724 | } |
43cd72b9 | 4725 | else if (opcode == get_const16_opcode ()) |
e0001a05 | 4726 | { |
43cd72b9 BW |
4727 | if (p_uses_l32r) |
4728 | *p_uses_l32r = FALSE; | |
4729 | if (xtensa_operand_get_field (isa, opcode, CONST16_TARGET_REG_OPERAND, | |
4730 | fmt, 0, slotbuf, ®no) | |
4731 | || xtensa_operand_decode (isa, opcode, CONST16_TARGET_REG_OPERAND, | |
4732 | ®no)) | |
4733 | return XTENSA_UNDEFINED; | |
4734 | ||
4735 | /* Check that the next instruction is also CONST16. */ | |
4736 | offset += xtensa_format_length (isa, fmt); | |
4737 | xtensa_insnbuf_from_chars (isa, insnbuf, buf + offset, bufsize - offset); | |
4738 | fmt = xtensa_format_decode (isa, insnbuf); | |
4739 | if (fmt == XTENSA_UNDEFINED | |
4740 | || xtensa_format_get_slot (isa, fmt, 0, insnbuf, slotbuf)) | |
4741 | return XTENSA_UNDEFINED; | |
4742 | opcode = xtensa_opcode_decode (isa, fmt, 0, slotbuf); | |
4743 | if (opcode != get_const16_opcode ()) | |
4744 | return XTENSA_UNDEFINED; | |
4745 | ||
4746 | if (xtensa_operand_get_field (isa, opcode, CONST16_TARGET_REG_OPERAND, | |
4747 | fmt, 0, slotbuf, &const16_regno) | |
4748 | || xtensa_operand_decode (isa, opcode, CONST16_TARGET_REG_OPERAND, | |
4749 | &const16_regno) | |
4750 | || const16_regno != regno) | |
4751 | return XTENSA_UNDEFINED; | |
e0001a05 | 4752 | } |
43cd72b9 BW |
4753 | else |
4754 | return XTENSA_UNDEFINED; | |
e0001a05 | 4755 | |
43cd72b9 BW |
4756 | /* Next instruction should be an CALLXn with operand 0 == regno. */ |
4757 | offset += xtensa_format_length (isa, fmt); | |
4758 | xtensa_insnbuf_from_chars (isa, insnbuf, buf + offset, bufsize - offset); | |
4759 | fmt = xtensa_format_decode (isa, insnbuf); | |
4760 | if (fmt == XTENSA_UNDEFINED | |
4761 | || xtensa_format_get_slot (isa, fmt, 0, insnbuf, slotbuf)) | |
4762 | return XTENSA_UNDEFINED; | |
4763 | opcode = xtensa_opcode_decode (isa, fmt, 0, slotbuf); | |
68ffbac6 | 4764 | if (opcode == XTENSA_UNDEFINED |
43cd72b9 BW |
4765 | || !is_indirect_call_opcode (opcode)) |
4766 | return XTENSA_UNDEFINED; | |
e0001a05 | 4767 | |
43cd72b9 BW |
4768 | if (xtensa_operand_get_field (isa, opcode, CALLN_SOURCE_OPERAND, |
4769 | fmt, 0, slotbuf, &call_regno) | |
4770 | || xtensa_operand_decode (isa, opcode, CALLN_SOURCE_OPERAND, | |
4771 | &call_regno)) | |
4772 | return XTENSA_UNDEFINED; | |
e0001a05 | 4773 | |
43cd72b9 BW |
4774 | if (call_regno != regno) |
4775 | return XTENSA_UNDEFINED; | |
e0001a05 | 4776 | |
43cd72b9 BW |
4777 | return opcode; |
4778 | } | |
e0001a05 | 4779 | |
43cd72b9 BW |
4780 | \f |
4781 | /* Data structures used during relaxation. */ | |
e0001a05 | 4782 | |
43cd72b9 | 4783 | /* r_reloc: relocation values. */ |
e0001a05 | 4784 | |
43cd72b9 BW |
4785 | /* Through the relaxation process, we need to keep track of the values |
4786 | that will result from evaluating relocations. The standard ELF | |
4787 | relocation structure is not sufficient for this purpose because we're | |
4788 | operating on multiple input files at once, so we need to know which | |
4789 | input file a relocation refers to. The r_reloc structure thus | |
4790 | records both the input file (bfd) and ELF relocation. | |
e0001a05 | 4791 | |
43cd72b9 BW |
4792 | For efficiency, an r_reloc also contains a "target_offset" field to |
4793 | cache the target-section-relative offset value that is represented by | |
4794 | the relocation. | |
68ffbac6 | 4795 | |
43cd72b9 BW |
4796 | The r_reloc also contains a virtual offset that allows multiple |
4797 | inserted literals to be placed at the same "address" with | |
4798 | different offsets. */ | |
e0001a05 | 4799 | |
43cd72b9 | 4800 | typedef struct r_reloc_struct r_reloc; |
e0001a05 | 4801 | |
43cd72b9 | 4802 | struct r_reloc_struct |
e0001a05 | 4803 | { |
43cd72b9 BW |
4804 | bfd *abfd; |
4805 | Elf_Internal_Rela rela; | |
e0001a05 | 4806 | bfd_vma target_offset; |
43cd72b9 | 4807 | bfd_vma virtual_offset; |
e0001a05 NC |
4808 | }; |
4809 | ||
e0001a05 | 4810 | |
43cd72b9 BW |
4811 | /* The r_reloc structure is included by value in literal_value, but not |
4812 | every literal_value has an associated relocation -- some are simple | |
4813 | constants. In such cases, we set all the fields in the r_reloc | |
4814 | struct to zero. The r_reloc_is_const function should be used to | |
4815 | detect this case. */ | |
e0001a05 | 4816 | |
43cd72b9 | 4817 | static bfd_boolean |
7fa3d080 | 4818 | r_reloc_is_const (const r_reloc *r_rel) |
e0001a05 | 4819 | { |
43cd72b9 | 4820 | return (r_rel->abfd == NULL); |
e0001a05 NC |
4821 | } |
4822 | ||
4823 | ||
43cd72b9 | 4824 | static bfd_vma |
7fa3d080 | 4825 | r_reloc_get_target_offset (const r_reloc *r_rel) |
e0001a05 | 4826 | { |
43cd72b9 BW |
4827 | bfd_vma target_offset; |
4828 | unsigned long r_symndx; | |
e0001a05 | 4829 | |
43cd72b9 BW |
4830 | BFD_ASSERT (!r_reloc_is_const (r_rel)); |
4831 | r_symndx = ELF32_R_SYM (r_rel->rela.r_info); | |
4832 | target_offset = get_elf_r_symndx_offset (r_rel->abfd, r_symndx); | |
4833 | return (target_offset + r_rel->rela.r_addend); | |
4834 | } | |
e0001a05 | 4835 | |
e0001a05 | 4836 | |
43cd72b9 | 4837 | static struct elf_link_hash_entry * |
7fa3d080 | 4838 | r_reloc_get_hash_entry (const r_reloc *r_rel) |
e0001a05 | 4839 | { |
43cd72b9 BW |
4840 | unsigned long r_symndx = ELF32_R_SYM (r_rel->rela.r_info); |
4841 | return get_elf_r_symndx_hash_entry (r_rel->abfd, r_symndx); | |
4842 | } | |
e0001a05 | 4843 | |
43cd72b9 BW |
4844 | |
4845 | static asection * | |
7fa3d080 | 4846 | r_reloc_get_section (const r_reloc *r_rel) |
43cd72b9 BW |
4847 | { |
4848 | unsigned long r_symndx = ELF32_R_SYM (r_rel->rela.r_info); | |
4849 | return get_elf_r_symndx_section (r_rel->abfd, r_symndx); | |
4850 | } | |
e0001a05 NC |
4851 | |
4852 | ||
4853 | static bfd_boolean | |
7fa3d080 | 4854 | r_reloc_is_defined (const r_reloc *r_rel) |
e0001a05 | 4855 | { |
43cd72b9 BW |
4856 | asection *sec; |
4857 | if (r_rel == NULL) | |
e0001a05 | 4858 | return FALSE; |
e0001a05 | 4859 | |
43cd72b9 BW |
4860 | sec = r_reloc_get_section (r_rel); |
4861 | if (sec == bfd_abs_section_ptr | |
4862 | || sec == bfd_com_section_ptr | |
4863 | || sec == bfd_und_section_ptr) | |
4864 | return FALSE; | |
4865 | return TRUE; | |
e0001a05 NC |
4866 | } |
4867 | ||
4868 | ||
7fa3d080 BW |
4869 | static void |
4870 | r_reloc_init (r_reloc *r_rel, | |
4871 | bfd *abfd, | |
4872 | Elf_Internal_Rela *irel, | |
4873 | bfd_byte *contents, | |
4874 | bfd_size_type content_length) | |
4875 | { | |
4876 | int r_type; | |
4877 | reloc_howto_type *howto; | |
4878 | ||
4879 | if (irel) | |
4880 | { | |
4881 | r_rel->rela = *irel; | |
4882 | r_rel->abfd = abfd; | |
4883 | r_rel->target_offset = r_reloc_get_target_offset (r_rel); | |
4884 | r_rel->virtual_offset = 0; | |
4885 | r_type = ELF32_R_TYPE (r_rel->rela.r_info); | |
4886 | howto = &elf_howto_table[r_type]; | |
4887 | if (howto->partial_inplace) | |
4888 | { | |
4889 | bfd_vma inplace_val; | |
4890 | BFD_ASSERT (r_rel->rela.r_offset < content_length); | |
4891 | ||
4892 | inplace_val = bfd_get_32 (abfd, &contents[r_rel->rela.r_offset]); | |
4893 | r_rel->target_offset += inplace_val; | |
4894 | } | |
4895 | } | |
4896 | else | |
4897 | memset (r_rel, 0, sizeof (r_reloc)); | |
4898 | } | |
4899 | ||
4900 | ||
43cd72b9 BW |
4901 | #if DEBUG |
4902 | ||
e0001a05 | 4903 | static void |
7fa3d080 | 4904 | print_r_reloc (FILE *fp, const r_reloc *r_rel) |
e0001a05 | 4905 | { |
43cd72b9 BW |
4906 | if (r_reloc_is_defined (r_rel)) |
4907 | { | |
4908 | asection *sec = r_reloc_get_section (r_rel); | |
4909 | fprintf (fp, " %s(%s + ", sec->owner->filename, sec->name); | |
4910 | } | |
4911 | else if (r_reloc_get_hash_entry (r_rel)) | |
4912 | fprintf (fp, " %s + ", r_reloc_get_hash_entry (r_rel)->root.root.string); | |
4913 | else | |
4914 | fprintf (fp, " ?? + "); | |
e0001a05 | 4915 | |
43cd72b9 BW |
4916 | fprintf_vma (fp, r_rel->target_offset); |
4917 | if (r_rel->virtual_offset) | |
4918 | { | |
4919 | fprintf (fp, " + "); | |
4920 | fprintf_vma (fp, r_rel->virtual_offset); | |
4921 | } | |
68ffbac6 | 4922 | |
43cd72b9 BW |
4923 | fprintf (fp, ")"); |
4924 | } | |
e0001a05 | 4925 | |
43cd72b9 | 4926 | #endif /* DEBUG */ |
e0001a05 | 4927 | |
43cd72b9 BW |
4928 | \f |
4929 | /* source_reloc: relocations that reference literals. */ | |
e0001a05 | 4930 | |
43cd72b9 BW |
4931 | /* To determine whether literals can be coalesced, we need to first |
4932 | record all the relocations that reference the literals. The | |
4933 | source_reloc structure below is used for this purpose. The | |
4934 | source_reloc entries are kept in a per-literal-section array, sorted | |
4935 | by offset within the literal section (i.e., target offset). | |
e0001a05 | 4936 | |
43cd72b9 BW |
4937 | The source_sec and r_rel.rela.r_offset fields identify the source of |
4938 | the relocation. The r_rel field records the relocation value, i.e., | |
4939 | the offset of the literal being referenced. The opnd field is needed | |
4940 | to determine the range of the immediate field to which the relocation | |
4941 | applies, so we can determine whether another literal with the same | |
4942 | value is within range. The is_null field is true when the relocation | |
4943 | is being removed (e.g., when an L32R is being removed due to a CALLX | |
4944 | that is converted to a direct CALL). */ | |
e0001a05 | 4945 | |
43cd72b9 BW |
4946 | typedef struct source_reloc_struct source_reloc; |
4947 | ||
4948 | struct source_reloc_struct | |
e0001a05 | 4949 | { |
43cd72b9 BW |
4950 | asection *source_sec; |
4951 | r_reloc r_rel; | |
4952 | xtensa_opcode opcode; | |
4953 | int opnd; | |
4954 | bfd_boolean is_null; | |
4955 | bfd_boolean is_abs_literal; | |
4956 | }; | |
e0001a05 | 4957 | |
e0001a05 | 4958 | |
e0001a05 | 4959 | static void |
7fa3d080 BW |
4960 | init_source_reloc (source_reloc *reloc, |
4961 | asection *source_sec, | |
4962 | const r_reloc *r_rel, | |
4963 | xtensa_opcode opcode, | |
4964 | int opnd, | |
4965 | bfd_boolean is_abs_literal) | |
e0001a05 | 4966 | { |
43cd72b9 BW |
4967 | reloc->source_sec = source_sec; |
4968 | reloc->r_rel = *r_rel; | |
4969 | reloc->opcode = opcode; | |
4970 | reloc->opnd = opnd; | |
4971 | reloc->is_null = FALSE; | |
4972 | reloc->is_abs_literal = is_abs_literal; | |
e0001a05 NC |
4973 | } |
4974 | ||
e0001a05 | 4975 | |
43cd72b9 BW |
4976 | /* Find the source_reloc for a particular source offset and relocation |
4977 | type. Note that the array is sorted by _target_ offset, so this is | |
4978 | just a linear search. */ | |
e0001a05 | 4979 | |
43cd72b9 | 4980 | static source_reloc * |
7fa3d080 BW |
4981 | find_source_reloc (source_reloc *src_relocs, |
4982 | int src_count, | |
4983 | asection *sec, | |
4984 | Elf_Internal_Rela *irel) | |
e0001a05 | 4985 | { |
43cd72b9 | 4986 | int i; |
e0001a05 | 4987 | |
43cd72b9 BW |
4988 | for (i = 0; i < src_count; i++) |
4989 | { | |
4990 | if (src_relocs[i].source_sec == sec | |
4991 | && src_relocs[i].r_rel.rela.r_offset == irel->r_offset | |
4992 | && (ELF32_R_TYPE (src_relocs[i].r_rel.rela.r_info) | |
4993 | == ELF32_R_TYPE (irel->r_info))) | |
4994 | return &src_relocs[i]; | |
4995 | } | |
e0001a05 | 4996 | |
43cd72b9 | 4997 | return NULL; |
e0001a05 NC |
4998 | } |
4999 | ||
5000 | ||
43cd72b9 | 5001 | static int |
7fa3d080 | 5002 | source_reloc_compare (const void *ap, const void *bp) |
e0001a05 | 5003 | { |
43cd72b9 BW |
5004 | const source_reloc *a = (const source_reloc *) ap; |
5005 | const source_reloc *b = (const source_reloc *) bp; | |
e0001a05 | 5006 | |
43cd72b9 BW |
5007 | if (a->r_rel.target_offset != b->r_rel.target_offset) |
5008 | return (a->r_rel.target_offset - b->r_rel.target_offset); | |
e0001a05 | 5009 | |
43cd72b9 BW |
5010 | /* We don't need to sort on these criteria for correctness, |
5011 | but enforcing a more strict ordering prevents unstable qsort | |
5012 | from behaving differently with different implementations. | |
5013 | Without the code below we get correct but different results | |
5014 | on Solaris 2.7 and 2.8. We would like to always produce the | |
5015 | same results no matter the host. */ | |
5016 | ||
5017 | if ((!a->is_null) - (!b->is_null)) | |
5018 | return ((!a->is_null) - (!b->is_null)); | |
5019 | return internal_reloc_compare (&a->r_rel.rela, &b->r_rel.rela); | |
e0001a05 NC |
5020 | } |
5021 | ||
43cd72b9 BW |
5022 | \f |
5023 | /* Literal values and value hash tables. */ | |
e0001a05 | 5024 | |
43cd72b9 BW |
5025 | /* Literals with the same value can be coalesced. The literal_value |
5026 | structure records the value of a literal: the "r_rel" field holds the | |
5027 | information from the relocation on the literal (if there is one) and | |
5028 | the "value" field holds the contents of the literal word itself. | |
e0001a05 | 5029 | |
43cd72b9 BW |
5030 | The value_map structure records a literal value along with the |
5031 | location of a literal holding that value. The value_map hash table | |
5032 | is indexed by the literal value, so that we can quickly check if a | |
5033 | particular literal value has been seen before and is thus a candidate | |
5034 | for coalescing. */ | |
e0001a05 | 5035 | |
43cd72b9 BW |
5036 | typedef struct literal_value_struct literal_value; |
5037 | typedef struct value_map_struct value_map; | |
5038 | typedef struct value_map_hash_table_struct value_map_hash_table; | |
e0001a05 | 5039 | |
43cd72b9 | 5040 | struct literal_value_struct |
e0001a05 | 5041 | { |
68ffbac6 | 5042 | r_reloc r_rel; |
43cd72b9 BW |
5043 | unsigned long value; |
5044 | bfd_boolean is_abs_literal; | |
5045 | }; | |
5046 | ||
5047 | struct value_map_struct | |
5048 | { | |
5049 | literal_value val; /* The literal value. */ | |
5050 | r_reloc loc; /* Location of the literal. */ | |
5051 | value_map *next; | |
5052 | }; | |
5053 | ||
5054 | struct value_map_hash_table_struct | |
5055 | { | |
5056 | unsigned bucket_count; | |
5057 | value_map **buckets; | |
5058 | unsigned count; | |
5059 | bfd_boolean has_last_loc; | |
5060 | r_reloc last_loc; | |
5061 | }; | |
5062 | ||
5063 | ||
e0001a05 | 5064 | static void |
7fa3d080 BW |
5065 | init_literal_value (literal_value *lit, |
5066 | const r_reloc *r_rel, | |
5067 | unsigned long value, | |
5068 | bfd_boolean is_abs_literal) | |
e0001a05 | 5069 | { |
43cd72b9 BW |
5070 | lit->r_rel = *r_rel; |
5071 | lit->value = value; | |
5072 | lit->is_abs_literal = is_abs_literal; | |
e0001a05 NC |
5073 | } |
5074 | ||
5075 | ||
43cd72b9 | 5076 | static bfd_boolean |
7fa3d080 BW |
5077 | literal_value_equal (const literal_value *src1, |
5078 | const literal_value *src2, | |
5079 | bfd_boolean final_static_link) | |
e0001a05 | 5080 | { |
43cd72b9 | 5081 | struct elf_link_hash_entry *h1, *h2; |
e0001a05 | 5082 | |
68ffbac6 | 5083 | if (r_reloc_is_const (&src1->r_rel) != r_reloc_is_const (&src2->r_rel)) |
43cd72b9 | 5084 | return FALSE; |
e0001a05 | 5085 | |
43cd72b9 BW |
5086 | if (r_reloc_is_const (&src1->r_rel)) |
5087 | return (src1->value == src2->value); | |
e0001a05 | 5088 | |
43cd72b9 BW |
5089 | if (ELF32_R_TYPE (src1->r_rel.rela.r_info) |
5090 | != ELF32_R_TYPE (src2->r_rel.rela.r_info)) | |
5091 | return FALSE; | |
e0001a05 | 5092 | |
43cd72b9 BW |
5093 | if (src1->r_rel.target_offset != src2->r_rel.target_offset) |
5094 | return FALSE; | |
68ffbac6 | 5095 | |
43cd72b9 BW |
5096 | if (src1->r_rel.virtual_offset != src2->r_rel.virtual_offset) |
5097 | return FALSE; | |
5098 | ||
5099 | if (src1->value != src2->value) | |
5100 | return FALSE; | |
68ffbac6 | 5101 | |
43cd72b9 BW |
5102 | /* Now check for the same section (if defined) or the same elf_hash |
5103 | (if undefined or weak). */ | |
5104 | h1 = r_reloc_get_hash_entry (&src1->r_rel); | |
5105 | h2 = r_reloc_get_hash_entry (&src2->r_rel); | |
5106 | if (r_reloc_is_defined (&src1->r_rel) | |
5107 | && (final_static_link | |
5108 | || ((!h1 || h1->root.type != bfd_link_hash_defweak) | |
5109 | && (!h2 || h2->root.type != bfd_link_hash_defweak)))) | |
5110 | { | |
5111 | if (r_reloc_get_section (&src1->r_rel) | |
5112 | != r_reloc_get_section (&src2->r_rel)) | |
5113 | return FALSE; | |
5114 | } | |
5115 | else | |
5116 | { | |
5117 | /* Require that the hash entries (i.e., symbols) be identical. */ | |
5118 | if (h1 != h2 || h1 == 0) | |
5119 | return FALSE; | |
5120 | } | |
5121 | ||
5122 | if (src1->is_abs_literal != src2->is_abs_literal) | |
5123 | return FALSE; | |
5124 | ||
5125 | return TRUE; | |
e0001a05 NC |
5126 | } |
5127 | ||
e0001a05 | 5128 | |
43cd72b9 BW |
5129 | /* Must be power of 2. */ |
5130 | #define INITIAL_HASH_RELOC_BUCKET_COUNT 1024 | |
e0001a05 | 5131 | |
43cd72b9 | 5132 | static value_map_hash_table * |
7fa3d080 | 5133 | value_map_hash_table_init (void) |
43cd72b9 BW |
5134 | { |
5135 | value_map_hash_table *values; | |
e0001a05 | 5136 | |
43cd72b9 BW |
5137 | values = (value_map_hash_table *) |
5138 | bfd_zmalloc (sizeof (value_map_hash_table)); | |
5139 | values->bucket_count = INITIAL_HASH_RELOC_BUCKET_COUNT; | |
5140 | values->count = 0; | |
5141 | values->buckets = (value_map **) | |
5142 | bfd_zmalloc (sizeof (value_map *) * values->bucket_count); | |
68ffbac6 | 5143 | if (values->buckets == NULL) |
43cd72b9 BW |
5144 | { |
5145 | free (values); | |
5146 | return NULL; | |
5147 | } | |
5148 | values->has_last_loc = FALSE; | |
5149 | ||
5150 | return values; | |
5151 | } | |
5152 | ||
5153 | ||
5154 | static void | |
7fa3d080 | 5155 | value_map_hash_table_delete (value_map_hash_table *table) |
e0001a05 | 5156 | { |
43cd72b9 BW |
5157 | free (table->buckets); |
5158 | free (table); | |
5159 | } | |
5160 | ||
5161 | ||
5162 | static unsigned | |
7fa3d080 | 5163 | hash_bfd_vma (bfd_vma val) |
43cd72b9 BW |
5164 | { |
5165 | return (val >> 2) + (val >> 10); | |
5166 | } | |
5167 | ||
5168 | ||
5169 | static unsigned | |
7fa3d080 | 5170 | literal_value_hash (const literal_value *src) |
43cd72b9 BW |
5171 | { |
5172 | unsigned hash_val; | |
e0001a05 | 5173 | |
43cd72b9 BW |
5174 | hash_val = hash_bfd_vma (src->value); |
5175 | if (!r_reloc_is_const (&src->r_rel)) | |
e0001a05 | 5176 | { |
43cd72b9 BW |
5177 | void *sec_or_hash; |
5178 | ||
5179 | hash_val += hash_bfd_vma (src->is_abs_literal * 1000); | |
5180 | hash_val += hash_bfd_vma (src->r_rel.target_offset); | |
5181 | hash_val += hash_bfd_vma (src->r_rel.virtual_offset); | |
68ffbac6 | 5182 | |
43cd72b9 BW |
5183 | /* Now check for the same section and the same elf_hash. */ |
5184 | if (r_reloc_is_defined (&src->r_rel)) | |
5185 | sec_or_hash = r_reloc_get_section (&src->r_rel); | |
5186 | else | |
5187 | sec_or_hash = r_reloc_get_hash_entry (&src->r_rel); | |
f60ca5e3 | 5188 | hash_val += hash_bfd_vma ((bfd_vma) (size_t) sec_or_hash); |
e0001a05 | 5189 | } |
43cd72b9 BW |
5190 | return hash_val; |
5191 | } | |
e0001a05 | 5192 | |
e0001a05 | 5193 | |
43cd72b9 | 5194 | /* Check if the specified literal_value has been seen before. */ |
e0001a05 | 5195 | |
43cd72b9 | 5196 | static value_map * |
7fa3d080 BW |
5197 | value_map_get_cached_value (value_map_hash_table *map, |
5198 | const literal_value *val, | |
5199 | bfd_boolean final_static_link) | |
43cd72b9 BW |
5200 | { |
5201 | value_map *map_e; | |
5202 | value_map *bucket; | |
5203 | unsigned idx; | |
5204 | ||
5205 | idx = literal_value_hash (val); | |
5206 | idx = idx & (map->bucket_count - 1); | |
5207 | bucket = map->buckets[idx]; | |
5208 | for (map_e = bucket; map_e; map_e = map_e->next) | |
e0001a05 | 5209 | { |
43cd72b9 BW |
5210 | if (literal_value_equal (&map_e->val, val, final_static_link)) |
5211 | return map_e; | |
5212 | } | |
5213 | return NULL; | |
5214 | } | |
e0001a05 | 5215 | |
e0001a05 | 5216 | |
43cd72b9 BW |
5217 | /* Record a new literal value. It is illegal to call this if VALUE |
5218 | already has an entry here. */ | |
5219 | ||
5220 | static value_map * | |
7fa3d080 BW |
5221 | add_value_map (value_map_hash_table *map, |
5222 | const literal_value *val, | |
5223 | const r_reloc *loc, | |
5224 | bfd_boolean final_static_link) | |
43cd72b9 BW |
5225 | { |
5226 | value_map **bucket_p; | |
5227 | unsigned idx; | |
5228 | ||
5229 | value_map *val_e = (value_map *) bfd_zmalloc (sizeof (value_map)); | |
5230 | if (val_e == NULL) | |
5231 | { | |
5232 | bfd_set_error (bfd_error_no_memory); | |
5233 | return NULL; | |
e0001a05 NC |
5234 | } |
5235 | ||
43cd72b9 BW |
5236 | BFD_ASSERT (!value_map_get_cached_value (map, val, final_static_link)); |
5237 | val_e->val = *val; | |
5238 | val_e->loc = *loc; | |
5239 | ||
5240 | idx = literal_value_hash (val); | |
5241 | idx = idx & (map->bucket_count - 1); | |
5242 | bucket_p = &map->buckets[idx]; | |
5243 | ||
5244 | val_e->next = *bucket_p; | |
5245 | *bucket_p = val_e; | |
5246 | map->count++; | |
5247 | /* FIXME: Consider resizing the hash table if we get too many entries. */ | |
68ffbac6 | 5248 | |
43cd72b9 | 5249 | return val_e; |
e0001a05 NC |
5250 | } |
5251 | ||
43cd72b9 BW |
5252 | \f |
5253 | /* Lists of text actions (ta_) for narrowing, widening, longcall | |
5254 | conversion, space fill, code & literal removal, etc. */ | |
5255 | ||
5256 | /* The following text actions are generated: | |
5257 | ||
07d6d2b8 AM |
5258 | "ta_remove_insn" remove an instruction or instructions |
5259 | "ta_remove_longcall" convert longcall to call | |
43cd72b9 | 5260 | "ta_convert_longcall" convert longcall to nop/call |
07d6d2b8 AM |
5261 | "ta_narrow_insn" narrow a wide instruction |
5262 | "ta_widen" widen a narrow instruction | |
5263 | "ta_fill" add fill or remove fill | |
43cd72b9 BW |
5264 | removed < 0 is a fill; branches to the fill address will be |
5265 | changed to address + fill size (e.g., address - removed) | |
5266 | removed >= 0 branches to the fill address will stay unchanged | |
07d6d2b8 | 5267 | "ta_remove_literal" remove a literal; this action is |
43cd72b9 | 5268 | indicated when a literal is removed |
07d6d2b8 AM |
5269 | or replaced. |
5270 | "ta_add_literal" insert a new literal; this action is | |
5271 | indicated when a literal has been moved. | |
5272 | It may use a virtual_offset because | |
43cd72b9 | 5273 | multiple literals can be placed at the |
07d6d2b8 | 5274 | same location. |
43cd72b9 BW |
5275 | |
5276 | For each of these text actions, we also record the number of bytes | |
5277 | removed by performing the text action. In the case of a "ta_widen" | |
5278 | or a "ta_fill" that adds space, the removed_bytes will be negative. */ | |
5279 | ||
5280 | typedef struct text_action_struct text_action; | |
5281 | typedef struct text_action_list_struct text_action_list; | |
5282 | typedef enum text_action_enum_t text_action_t; | |
5283 | ||
5284 | enum text_action_enum_t | |
5285 | { | |
5286 | ta_none, | |
07d6d2b8 AM |
5287 | ta_remove_insn, /* removed = -size */ |
5288 | ta_remove_longcall, /* removed = -size */ | |
5289 | ta_convert_longcall, /* removed = 0 */ | |
5290 | ta_narrow_insn, /* removed = -1 */ | |
5291 | ta_widen_insn, /* removed = +1 */ | |
5292 | ta_fill, /* removed = +size */ | |
43cd72b9 BW |
5293 | ta_remove_literal, |
5294 | ta_add_literal | |
5295 | }; | |
e0001a05 | 5296 | |
e0001a05 | 5297 | |
43cd72b9 BW |
5298 | /* Structure for a text action record. */ |
5299 | struct text_action_struct | |
e0001a05 | 5300 | { |
43cd72b9 BW |
5301 | text_action_t action; |
5302 | asection *sec; /* Optional */ | |
5303 | bfd_vma offset; | |
5304 | bfd_vma virtual_offset; /* Zero except for adding literals. */ | |
5305 | int removed_bytes; | |
5306 | literal_value value; /* Only valid when adding literals. */ | |
43cd72b9 | 5307 | }; |
e0001a05 | 5308 | |
071aa5c9 MF |
5309 | struct removal_by_action_entry_struct |
5310 | { | |
5311 | bfd_vma offset; | |
5312 | int removed; | |
5313 | int eq_removed; | |
5314 | int eq_removed_before_fill; | |
5315 | }; | |
5316 | typedef struct removal_by_action_entry_struct removal_by_action_entry; | |
5317 | ||
5318 | struct removal_by_action_map_struct | |
5319 | { | |
5320 | unsigned n_entries; | |
5321 | removal_by_action_entry *entry; | |
5322 | }; | |
5323 | typedef struct removal_by_action_map_struct removal_by_action_map; | |
5324 | ||
e0001a05 | 5325 | |
43cd72b9 BW |
5326 | /* List of all of the actions taken on a text section. */ |
5327 | struct text_action_list_struct | |
5328 | { | |
4c2af04f MF |
5329 | unsigned count; |
5330 | splay_tree tree; | |
071aa5c9 | 5331 | removal_by_action_map map; |
43cd72b9 | 5332 | }; |
e0001a05 | 5333 | |
e0001a05 | 5334 | |
7fa3d080 BW |
5335 | static text_action * |
5336 | find_fill_action (text_action_list *l, asection *sec, bfd_vma offset) | |
43cd72b9 | 5337 | { |
4c2af04f | 5338 | text_action a; |
43cd72b9 BW |
5339 | |
5340 | /* It is not necessary to fill at the end of a section. */ | |
5341 | if (sec->size == offset) | |
5342 | return NULL; | |
5343 | ||
4c2af04f MF |
5344 | a.offset = offset; |
5345 | a.action = ta_fill; | |
5346 | ||
5347 | splay_tree_node node = splay_tree_lookup (l->tree, (splay_tree_key)&a); | |
5348 | if (node) | |
5349 | return (text_action *)node->value; | |
43cd72b9 BW |
5350 | return NULL; |
5351 | } | |
5352 | ||
5353 | ||
5354 | static int | |
7fa3d080 BW |
5355 | compute_removed_action_diff (const text_action *ta, |
5356 | asection *sec, | |
5357 | bfd_vma offset, | |
5358 | int removed, | |
5359 | int removable_space) | |
43cd72b9 BW |
5360 | { |
5361 | int new_removed; | |
5362 | int current_removed = 0; | |
5363 | ||
7fa3d080 | 5364 | if (ta) |
43cd72b9 BW |
5365 | current_removed = ta->removed_bytes; |
5366 | ||
5367 | BFD_ASSERT (ta == NULL || ta->offset == offset); | |
5368 | BFD_ASSERT (ta == NULL || ta->action == ta_fill); | |
5369 | ||
5370 | /* It is not necessary to fill at the end of a section. Clean this up. */ | |
5371 | if (sec->size == offset) | |
5372 | new_removed = removable_space - 0; | |
5373 | else | |
5374 | { | |
5375 | int space; | |
5376 | int added = -removed - current_removed; | |
5377 | /* Ignore multiples of the section alignment. */ | |
5378 | added = ((1 << sec->alignment_power) - 1) & added; | |
5379 | new_removed = (-added); | |
5380 | ||
5381 | /* Modify for removable. */ | |
5382 | space = removable_space - new_removed; | |
5383 | new_removed = (removable_space | |
5384 | - (((1 << sec->alignment_power) - 1) & space)); | |
5385 | } | |
5386 | return (new_removed - current_removed); | |
5387 | } | |
5388 | ||
5389 | ||
7fa3d080 BW |
5390 | static void |
5391 | adjust_fill_action (text_action *ta, int fill_diff) | |
43cd72b9 BW |
5392 | { |
5393 | ta->removed_bytes += fill_diff; | |
5394 | } | |
5395 | ||
5396 | ||
4c2af04f MF |
5397 | static int |
5398 | text_action_compare (splay_tree_key a, splay_tree_key b) | |
5399 | { | |
5400 | text_action *pa = (text_action *)a; | |
5401 | text_action *pb = (text_action *)b; | |
5402 | static const int action_priority[] = | |
5403 | { | |
5404 | [ta_fill] = 0, | |
5405 | [ta_none] = 1, | |
5406 | [ta_convert_longcall] = 2, | |
5407 | [ta_narrow_insn] = 3, | |
5408 | [ta_remove_insn] = 4, | |
5409 | [ta_remove_longcall] = 5, | |
5410 | [ta_remove_literal] = 6, | |
5411 | [ta_widen_insn] = 7, | |
5412 | [ta_add_literal] = 8, | |
5413 | }; | |
5414 | ||
5415 | if (pa->offset == pb->offset) | |
5416 | { | |
5417 | if (pa->action == pb->action) | |
5418 | return 0; | |
5419 | return action_priority[pa->action] - action_priority[pb->action]; | |
5420 | } | |
5421 | else | |
5422 | return pa->offset < pb->offset ? -1 : 1; | |
5423 | } | |
5424 | ||
5425 | static text_action * | |
5426 | action_first (text_action_list *action_list) | |
5427 | { | |
5428 | splay_tree_node node = splay_tree_min (action_list->tree); | |
5429 | return node ? (text_action *)node->value : NULL; | |
5430 | } | |
5431 | ||
5432 | static text_action * | |
5433 | action_next (text_action_list *action_list, text_action *action) | |
5434 | { | |
5435 | splay_tree_node node = splay_tree_successor (action_list->tree, | |
5436 | (splay_tree_key)action); | |
5437 | return node ? (text_action *)node->value : NULL; | |
5438 | } | |
5439 | ||
43cd72b9 BW |
5440 | /* Add a modification action to the text. For the case of adding or |
5441 | removing space, modify any current fill and assume that | |
5442 | "unreachable_space" bytes can be freely contracted. Note that a | |
5443 | negative removed value is a fill. */ | |
5444 | ||
68ffbac6 | 5445 | static void |
7fa3d080 BW |
5446 | text_action_add (text_action_list *l, |
5447 | text_action_t action, | |
5448 | asection *sec, | |
5449 | bfd_vma offset, | |
5450 | int removed) | |
43cd72b9 | 5451 | { |
43cd72b9 | 5452 | text_action *ta; |
4c2af04f | 5453 | text_action a; |
43cd72b9 BW |
5454 | |
5455 | /* It is not necessary to fill at the end of a section. */ | |
5456 | if (action == ta_fill && sec->size == offset) | |
5457 | return; | |
5458 | ||
5459 | /* It is not necessary to fill 0 bytes. */ | |
5460 | if (action == ta_fill && removed == 0) | |
5461 | return; | |
5462 | ||
4c2af04f MF |
5463 | a.action = action; |
5464 | a.offset = offset; | |
5465 | ||
5466 | if (action == ta_fill) | |
43cd72b9 | 5467 | { |
4c2af04f | 5468 | splay_tree_node node = splay_tree_lookup (l->tree, (splay_tree_key)&a); |
68ffbac6 | 5469 | |
4c2af04f | 5470 | if (node) |
43cd72b9 | 5471 | { |
4c2af04f MF |
5472 | ta = (text_action *)node->value; |
5473 | ta->removed_bytes += removed; | |
5474 | return; | |
43cd72b9 BW |
5475 | } |
5476 | } | |
4c2af04f MF |
5477 | else |
5478 | BFD_ASSERT (splay_tree_lookup (l->tree, (splay_tree_key)&a) == NULL); | |
43cd72b9 | 5479 | |
43cd72b9 BW |
5480 | ta = (text_action *) bfd_zmalloc (sizeof (text_action)); |
5481 | ta->action = action; | |
5482 | ta->sec = sec; | |
5483 | ta->offset = offset; | |
5484 | ta->removed_bytes = removed; | |
4c2af04f MF |
5485 | splay_tree_insert (l->tree, (splay_tree_key)ta, (splay_tree_value)ta); |
5486 | ++l->count; | |
43cd72b9 BW |
5487 | } |
5488 | ||
5489 | ||
5490 | static void | |
7fa3d080 BW |
5491 | text_action_add_literal (text_action_list *l, |
5492 | text_action_t action, | |
5493 | const r_reloc *loc, | |
5494 | const literal_value *value, | |
5495 | int removed) | |
43cd72b9 | 5496 | { |
43cd72b9 BW |
5497 | text_action *ta; |
5498 | asection *sec = r_reloc_get_section (loc); | |
5499 | bfd_vma offset = loc->target_offset; | |
5500 | bfd_vma virtual_offset = loc->virtual_offset; | |
5501 | ||
5502 | BFD_ASSERT (action == ta_add_literal); | |
5503 | ||
43cd72b9 BW |
5504 | /* Create a new record and fill it up. */ |
5505 | ta = (text_action *) bfd_zmalloc (sizeof (text_action)); | |
5506 | ta->action = action; | |
5507 | ta->sec = sec; | |
5508 | ta->offset = offset; | |
5509 | ta->virtual_offset = virtual_offset; | |
5510 | ta->value = *value; | |
5511 | ta->removed_bytes = removed; | |
4c2af04f MF |
5512 | |
5513 | BFD_ASSERT (splay_tree_lookup (l->tree, (splay_tree_key)ta) == NULL); | |
5514 | splay_tree_insert (l->tree, (splay_tree_key)ta, (splay_tree_value)ta); | |
5515 | ++l->count; | |
43cd72b9 BW |
5516 | } |
5517 | ||
5518 | ||
03669f1c BW |
5519 | /* Find the total offset adjustment for the relaxations specified by |
5520 | text_actions, beginning from a particular starting action. This is | |
5521 | typically used from offset_with_removed_text to search an entire list of | |
5522 | actions, but it may also be called directly when adjusting adjacent offsets | |
5523 | so that each search may begin where the previous one left off. */ | |
5524 | ||
5525 | static int | |
4c2af04f MF |
5526 | removed_by_actions (text_action_list *action_list, |
5527 | text_action **p_start_action, | |
03669f1c BW |
5528 | bfd_vma offset, |
5529 | bfd_boolean before_fill) | |
43cd72b9 BW |
5530 | { |
5531 | text_action *r; | |
5532 | int removed = 0; | |
5533 | ||
03669f1c | 5534 | r = *p_start_action; |
4c2af04f MF |
5535 | if (r) |
5536 | { | |
5537 | splay_tree_node node = splay_tree_lookup (action_list->tree, | |
5538 | (splay_tree_key)r); | |
5539 | BFD_ASSERT (node != NULL && r == (text_action *)node->value); | |
5540 | } | |
5541 | ||
03669f1c | 5542 | while (r) |
43cd72b9 | 5543 | { |
03669f1c BW |
5544 | if (r->offset > offset) |
5545 | break; | |
5546 | ||
5547 | if (r->offset == offset | |
5548 | && (before_fill || r->action != ta_fill || r->removed_bytes >= 0)) | |
5549 | break; | |
5550 | ||
5551 | removed += r->removed_bytes; | |
5552 | ||
4c2af04f | 5553 | r = action_next (action_list, r); |
43cd72b9 BW |
5554 | } |
5555 | ||
03669f1c BW |
5556 | *p_start_action = r; |
5557 | return removed; | |
5558 | } | |
5559 | ||
5560 | ||
68ffbac6 | 5561 | static bfd_vma |
03669f1c BW |
5562 | offset_with_removed_text (text_action_list *action_list, bfd_vma offset) |
5563 | { | |
4c2af04f MF |
5564 | text_action *r = action_first (action_list); |
5565 | ||
5566 | return offset - removed_by_actions (action_list, &r, offset, FALSE); | |
43cd72b9 BW |
5567 | } |
5568 | ||
5569 | ||
03e94c08 BW |
5570 | static unsigned |
5571 | action_list_count (text_action_list *action_list) | |
5572 | { | |
4c2af04f | 5573 | return action_list->count; |
03e94c08 BW |
5574 | } |
5575 | ||
4c2af04f MF |
5576 | typedef struct map_action_fn_context_struct map_action_fn_context; |
5577 | struct map_action_fn_context_struct | |
071aa5c9 | 5578 | { |
4c2af04f | 5579 | int removed; |
071aa5c9 MF |
5580 | removal_by_action_map map; |
5581 | bfd_boolean eq_complete; | |
4c2af04f | 5582 | }; |
071aa5c9 | 5583 | |
4c2af04f MF |
5584 | static int |
5585 | map_action_fn (splay_tree_node node, void *p) | |
5586 | { | |
5587 | map_action_fn_context *ctx = p; | |
5588 | text_action *r = (text_action *)node->value; | |
5589 | removal_by_action_entry *ientry = ctx->map.entry + ctx->map.n_entries; | |
071aa5c9 | 5590 | |
4c2af04f | 5591 | if (ctx->map.n_entries && (ientry - 1)->offset == r->offset) |
071aa5c9 | 5592 | { |
4c2af04f MF |
5593 | --ientry; |
5594 | } | |
5595 | else | |
5596 | { | |
5597 | ++ctx->map.n_entries; | |
5598 | ctx->eq_complete = FALSE; | |
5599 | ientry->offset = r->offset; | |
5600 | ientry->eq_removed_before_fill = ctx->removed; | |
5601 | } | |
071aa5c9 | 5602 | |
4c2af04f MF |
5603 | if (!ctx->eq_complete) |
5604 | { | |
5605 | if (r->action != ta_fill || r->removed_bytes >= 0) | |
071aa5c9 | 5606 | { |
4c2af04f MF |
5607 | ientry->eq_removed = ctx->removed; |
5608 | ctx->eq_complete = TRUE; | |
071aa5c9 MF |
5609 | } |
5610 | else | |
4c2af04f MF |
5611 | ientry->eq_removed = ctx->removed + r->removed_bytes; |
5612 | } | |
071aa5c9 | 5613 | |
4c2af04f MF |
5614 | ctx->removed += r->removed_bytes; |
5615 | ientry->removed = ctx->removed; | |
5616 | return 0; | |
5617 | } | |
071aa5c9 | 5618 | |
4c2af04f MF |
5619 | static void |
5620 | map_removal_by_action (text_action_list *action_list) | |
5621 | { | |
5622 | map_action_fn_context ctx; | |
5623 | ||
5624 | ctx.removed = 0; | |
5625 | ctx.map.n_entries = 0; | |
5626 | ctx.map.entry = bfd_malloc (action_list_count (action_list) * | |
5627 | sizeof (removal_by_action_entry)); | |
5628 | ctx.eq_complete = FALSE; | |
5629 | ||
5630 | splay_tree_foreach (action_list->tree, map_action_fn, &ctx); | |
5631 | action_list->map = ctx.map; | |
071aa5c9 MF |
5632 | } |
5633 | ||
5634 | static int | |
5635 | removed_by_actions_map (text_action_list *action_list, bfd_vma offset, | |
5636 | bfd_boolean before_fill) | |
5637 | { | |
5638 | unsigned a, b; | |
5639 | ||
5640 | if (!action_list->map.entry) | |
5641 | map_removal_by_action (action_list); | |
5642 | ||
5643 | if (!action_list->map.n_entries) | |
5644 | return 0; | |
5645 | ||
5646 | a = 0; | |
5647 | b = action_list->map.n_entries; | |
5648 | ||
5649 | while (b - a > 1) | |
5650 | { | |
5651 | unsigned c = (a + b) / 2; | |
5652 | ||
5653 | if (action_list->map.entry[c].offset <= offset) | |
5654 | a = c; | |
5655 | else | |
5656 | b = c; | |
5657 | } | |
5658 | ||
5659 | if (action_list->map.entry[a].offset < offset) | |
5660 | { | |
5661 | return action_list->map.entry[a].removed; | |
5662 | } | |
5663 | else if (action_list->map.entry[a].offset == offset) | |
5664 | { | |
5665 | return before_fill ? | |
5666 | action_list->map.entry[a].eq_removed_before_fill : | |
5667 | action_list->map.entry[a].eq_removed; | |
5668 | } | |
5669 | else | |
5670 | { | |
5671 | return 0; | |
5672 | } | |
5673 | } | |
5674 | ||
5675 | static bfd_vma | |
5676 | offset_with_removed_text_map (text_action_list *action_list, bfd_vma offset) | |
5677 | { | |
5678 | int removed = removed_by_actions_map (action_list, offset, FALSE); | |
5679 | return offset - removed; | |
5680 | } | |
5681 | ||
03e94c08 | 5682 | |
43cd72b9 BW |
5683 | /* The find_insn_action routine will only find non-fill actions. */ |
5684 | ||
7fa3d080 BW |
5685 | static text_action * |
5686 | find_insn_action (text_action_list *action_list, bfd_vma offset) | |
43cd72b9 | 5687 | { |
4c2af04f | 5688 | static const text_action_t action[] = |
43cd72b9 | 5689 | { |
4c2af04f MF |
5690 | ta_convert_longcall, |
5691 | ta_remove_longcall, | |
5692 | ta_widen_insn, | |
5693 | ta_narrow_insn, | |
5694 | ta_remove_insn, | |
5695 | }; | |
5696 | text_action a; | |
5697 | unsigned i; | |
5698 | ||
5699 | a.offset = offset; | |
5700 | for (i = 0; i < sizeof (action) / sizeof (*action); ++i) | |
5701 | { | |
5702 | splay_tree_node node; | |
5703 | ||
5704 | a.action = action[i]; | |
5705 | node = splay_tree_lookup (action_list->tree, (splay_tree_key)&a); | |
5706 | if (node) | |
5707 | return (text_action *)node->value; | |
43cd72b9 BW |
5708 | } |
5709 | return NULL; | |
5710 | } | |
5711 | ||
5712 | ||
5713 | #if DEBUG | |
5714 | ||
5715 | static void | |
4c2af04f MF |
5716 | print_action (FILE *fp, text_action *r) |
5717 | { | |
5718 | const char *t = "unknown"; | |
5719 | switch (r->action) | |
5720 | { | |
5721 | case ta_remove_insn: | |
5722 | t = "remove_insn"; break; | |
5723 | case ta_remove_longcall: | |
5724 | t = "remove_longcall"; break; | |
5725 | case ta_convert_longcall: | |
5726 | t = "convert_longcall"; break; | |
5727 | case ta_narrow_insn: | |
5728 | t = "narrow_insn"; break; | |
5729 | case ta_widen_insn: | |
5730 | t = "widen_insn"; break; | |
5731 | case ta_fill: | |
5732 | t = "fill"; break; | |
5733 | case ta_none: | |
5734 | t = "none"; break; | |
5735 | case ta_remove_literal: | |
5736 | t = "remove_literal"; break; | |
5737 | case ta_add_literal: | |
5738 | t = "add_literal"; break; | |
5739 | } | |
5740 | ||
5741 | fprintf (fp, "%s: %s[0x%lx] \"%s\" %d\n", | |
5742 | r->sec->owner->filename, | |
5743 | r->sec->name, (unsigned long) r->offset, t, r->removed_bytes); | |
5744 | } | |
5745 | ||
5746 | static int | |
5747 | print_action_list_fn (splay_tree_node node, void *p) | |
43cd72b9 | 5748 | { |
4c2af04f | 5749 | text_action *r = (text_action *)node->value; |
43cd72b9 | 5750 | |
4c2af04f MF |
5751 | print_action (p, r); |
5752 | return 0; | |
5753 | } | |
43cd72b9 | 5754 | |
4c2af04f MF |
5755 | static void |
5756 | print_action_list (FILE *fp, text_action_list *action_list) | |
5757 | { | |
5758 | fprintf (fp, "Text Action\n"); | |
5759 | splay_tree_foreach (action_list->tree, print_action_list_fn, fp); | |
43cd72b9 BW |
5760 | } |
5761 | ||
5762 | #endif /* DEBUG */ | |
5763 | ||
5764 | \f | |
5765 | /* Lists of literals being coalesced or removed. */ | |
5766 | ||
5767 | /* In the usual case, the literal identified by "from" is being | |
5768 | coalesced with another literal identified by "to". If the literal is | |
5769 | unused and is being removed altogether, "to.abfd" will be NULL. | |
5770 | The removed_literal entries are kept on a per-section list, sorted | |
5771 | by the "from" offset field. */ | |
5772 | ||
5773 | typedef struct removed_literal_struct removed_literal; | |
3439c466 | 5774 | typedef struct removed_literal_map_entry_struct removed_literal_map_entry; |
43cd72b9 BW |
5775 | typedef struct removed_literal_list_struct removed_literal_list; |
5776 | ||
5777 | struct removed_literal_struct | |
5778 | { | |
5779 | r_reloc from; | |
5780 | r_reloc to; | |
5781 | removed_literal *next; | |
5782 | }; | |
5783 | ||
3439c466 MF |
5784 | struct removed_literal_map_entry_struct |
5785 | { | |
5786 | bfd_vma addr; | |
5787 | removed_literal *literal; | |
5788 | }; | |
5789 | ||
43cd72b9 BW |
5790 | struct removed_literal_list_struct |
5791 | { | |
5792 | removed_literal *head; | |
5793 | removed_literal *tail; | |
3439c466 MF |
5794 | |
5795 | unsigned n_map; | |
5796 | removed_literal_map_entry *map; | |
43cd72b9 BW |
5797 | }; |
5798 | ||
5799 | ||
43cd72b9 BW |
5800 | /* Record that the literal at "from" is being removed. If "to" is not |
5801 | NULL, the "from" literal is being coalesced with the "to" literal. */ | |
5802 | ||
5803 | static void | |
7fa3d080 BW |
5804 | add_removed_literal (removed_literal_list *removed_list, |
5805 | const r_reloc *from, | |
5806 | const r_reloc *to) | |
43cd72b9 BW |
5807 | { |
5808 | removed_literal *r, *new_r, *next_r; | |
5809 | ||
5810 | new_r = (removed_literal *) bfd_zmalloc (sizeof (removed_literal)); | |
5811 | ||
5812 | new_r->from = *from; | |
5813 | if (to) | |
5814 | new_r->to = *to; | |
5815 | else | |
5816 | new_r->to.abfd = NULL; | |
5817 | new_r->next = NULL; | |
68ffbac6 | 5818 | |
43cd72b9 | 5819 | r = removed_list->head; |
68ffbac6 | 5820 | if (r == NULL) |
43cd72b9 BW |
5821 | { |
5822 | removed_list->head = new_r; | |
5823 | removed_list->tail = new_r; | |
5824 | } | |
5825 | /* Special check for common case of append. */ | |
5826 | else if (removed_list->tail->from.target_offset < from->target_offset) | |
5827 | { | |
5828 | removed_list->tail->next = new_r; | |
5829 | removed_list->tail = new_r; | |
5830 | } | |
5831 | else | |
5832 | { | |
68ffbac6 | 5833 | while (r->from.target_offset < from->target_offset && r->next) |
43cd72b9 BW |
5834 | { |
5835 | r = r->next; | |
5836 | } | |
5837 | next_r = r->next; | |
5838 | r->next = new_r; | |
5839 | new_r->next = next_r; | |
5840 | if (next_r == NULL) | |
5841 | removed_list->tail = new_r; | |
5842 | } | |
5843 | } | |
5844 | ||
3439c466 MF |
5845 | static void |
5846 | map_removed_literal (removed_literal_list *removed_list) | |
5847 | { | |
5848 | unsigned n_map = 0; | |
5849 | unsigned i; | |
5850 | removed_literal_map_entry *map = NULL; | |
5851 | removed_literal *r = removed_list->head; | |
5852 | ||
5853 | for (i = 0; r; ++i, r = r->next) | |
5854 | { | |
5855 | if (i == n_map) | |
5856 | { | |
5857 | n_map = (n_map * 2) + 2; | |
5858 | map = bfd_realloc (map, n_map * sizeof (*map)); | |
5859 | } | |
5860 | map[i].addr = r->from.target_offset; | |
5861 | map[i].literal = r; | |
5862 | } | |
5863 | removed_list->map = map; | |
5864 | removed_list->n_map = i; | |
5865 | } | |
5866 | ||
5867 | static int | |
5868 | removed_literal_compare (const void *a, const void *b) | |
5869 | { | |
5870 | const removed_literal_map_entry *pa = a; | |
5871 | const removed_literal_map_entry *pb = b; | |
5872 | ||
5873 | if (pa->addr == pb->addr) | |
5874 | return 0; | |
5875 | else | |
5876 | return pa->addr < pb->addr ? -1 : 1; | |
5877 | } | |
43cd72b9 BW |
5878 | |
5879 | /* Check if the list of removed literals contains an entry for the | |
5880 | given address. Return the entry if found. */ | |
5881 | ||
5882 | static removed_literal * | |
7fa3d080 | 5883 | find_removed_literal (removed_literal_list *removed_list, bfd_vma addr) |
43cd72b9 | 5884 | { |
3439c466 MF |
5885 | removed_literal_map_entry *p; |
5886 | removed_literal *r = NULL; | |
5887 | ||
5888 | if (removed_list->map == NULL) | |
5889 | map_removed_literal (removed_list); | |
5890 | ||
5891 | p = bsearch (&addr, removed_list->map, removed_list->n_map, | |
5892 | sizeof (*removed_list->map), removed_literal_compare); | |
5893 | if (p) | |
5894 | { | |
5895 | while (p != removed_list->map && (p - 1)->addr == addr) | |
5896 | --p; | |
5897 | r = p->literal; | |
5898 | } | |
5899 | return r; | |
43cd72b9 BW |
5900 | } |
5901 | ||
5902 | ||
5903 | #if DEBUG | |
5904 | ||
5905 | static void | |
7fa3d080 | 5906 | print_removed_literals (FILE *fp, removed_literal_list *removed_list) |
43cd72b9 BW |
5907 | { |
5908 | removed_literal *r; | |
5909 | r = removed_list->head; | |
5910 | if (r) | |
5911 | fprintf (fp, "Removed Literals\n"); | |
5912 | for (; r != NULL; r = r->next) | |
5913 | { | |
5914 | print_r_reloc (fp, &r->from); | |
5915 | fprintf (fp, " => "); | |
5916 | if (r->to.abfd == NULL) | |
5917 | fprintf (fp, "REMOVED"); | |
5918 | else | |
5919 | print_r_reloc (fp, &r->to); | |
5920 | fprintf (fp, "\n"); | |
5921 | } | |
5922 | } | |
5923 | ||
5924 | #endif /* DEBUG */ | |
5925 | ||
5926 | \f | |
5927 | /* Per-section data for relaxation. */ | |
5928 | ||
5929 | typedef struct reloc_bfd_fix_struct reloc_bfd_fix; | |
5930 | ||
5931 | struct xtensa_relax_info_struct | |
5932 | { | |
5933 | bfd_boolean is_relaxable_literal_section; | |
5934 | bfd_boolean is_relaxable_asm_section; | |
5935 | int visited; /* Number of times visited. */ | |
5936 | ||
5937 | source_reloc *src_relocs; /* Array[src_count]. */ | |
5938 | int src_count; | |
5939 | int src_next; /* Next src_relocs entry to assign. */ | |
5940 | ||
5941 | removed_literal_list removed_list; | |
5942 | text_action_list action_list; | |
5943 | ||
5944 | reloc_bfd_fix *fix_list; | |
5945 | reloc_bfd_fix *fix_array; | |
5946 | unsigned fix_array_count; | |
5947 | ||
5948 | /* Support for expanding the reloc array that is stored | |
5949 | in the section structure. If the relocations have been | |
5950 | reallocated, the newly allocated relocations will be referenced | |
5951 | here along with the actual size allocated. The relocation | |
5952 | count will always be found in the section structure. */ | |
68ffbac6 | 5953 | Elf_Internal_Rela *allocated_relocs; |
43cd72b9 BW |
5954 | unsigned relocs_count; |
5955 | unsigned allocated_relocs_count; | |
5956 | }; | |
5957 | ||
5958 | struct elf_xtensa_section_data | |
5959 | { | |
5960 | struct bfd_elf_section_data elf; | |
5961 | xtensa_relax_info relax_info; | |
5962 | }; | |
5963 | ||
43cd72b9 BW |
5964 | |
5965 | static bfd_boolean | |
7fa3d080 | 5966 | elf_xtensa_new_section_hook (bfd *abfd, asection *sec) |
43cd72b9 | 5967 | { |
f592407e AM |
5968 | if (!sec->used_by_bfd) |
5969 | { | |
5970 | struct elf_xtensa_section_data *sdata; | |
5971 | bfd_size_type amt = sizeof (*sdata); | |
43cd72b9 | 5972 | |
f592407e AM |
5973 | sdata = bfd_zalloc (abfd, amt); |
5974 | if (sdata == NULL) | |
5975 | return FALSE; | |
5976 | sec->used_by_bfd = sdata; | |
5977 | } | |
43cd72b9 BW |
5978 | |
5979 | return _bfd_elf_new_section_hook (abfd, sec); | |
5980 | } | |
5981 | ||
5982 | ||
7fa3d080 BW |
5983 | static xtensa_relax_info * |
5984 | get_xtensa_relax_info (asection *sec) | |
5985 | { | |
5986 | struct elf_xtensa_section_data *section_data; | |
5987 | ||
5988 | /* No info available if no section or if it is an output section. */ | |
5989 | if (!sec || sec == sec->output_section) | |
5990 | return NULL; | |
5991 | ||
5992 | section_data = (struct elf_xtensa_section_data *) elf_section_data (sec); | |
5993 | return §ion_data->relax_info; | |
5994 | } | |
5995 | ||
5996 | ||
43cd72b9 | 5997 | static void |
7fa3d080 | 5998 | init_xtensa_relax_info (asection *sec) |
43cd72b9 BW |
5999 | { |
6000 | xtensa_relax_info *relax_info = get_xtensa_relax_info (sec); | |
6001 | ||
6002 | relax_info->is_relaxable_literal_section = FALSE; | |
6003 | relax_info->is_relaxable_asm_section = FALSE; | |
6004 | relax_info->visited = 0; | |
6005 | ||
6006 | relax_info->src_relocs = NULL; | |
6007 | relax_info->src_count = 0; | |
6008 | relax_info->src_next = 0; | |
6009 | ||
6010 | relax_info->removed_list.head = NULL; | |
6011 | relax_info->removed_list.tail = NULL; | |
6012 | ||
4c2af04f MF |
6013 | relax_info->action_list.tree = splay_tree_new (text_action_compare, |
6014 | NULL, NULL); | |
071aa5c9 MF |
6015 | relax_info->action_list.map.n_entries = 0; |
6016 | relax_info->action_list.map.entry = NULL; | |
6017 | ||
43cd72b9 BW |
6018 | relax_info->fix_list = NULL; |
6019 | relax_info->fix_array = NULL; | |
6020 | relax_info->fix_array_count = 0; | |
6021 | ||
68ffbac6 | 6022 | relax_info->allocated_relocs = NULL; |
43cd72b9 BW |
6023 | relax_info->relocs_count = 0; |
6024 | relax_info->allocated_relocs_count = 0; | |
6025 | } | |
6026 | ||
43cd72b9 BW |
6027 | \f |
6028 | /* Coalescing literals may require a relocation to refer to a section in | |
6029 | a different input file, but the standard relocation information | |
6030 | cannot express that. Instead, the reloc_bfd_fix structures are used | |
6031 | to "fix" the relocations that refer to sections in other input files. | |
6032 | These structures are kept on per-section lists. The "src_type" field | |
6033 | records the relocation type in case there are multiple relocations on | |
6034 | the same location. FIXME: This is ugly; an alternative might be to | |
6035 | add new symbols with the "owner" field to some other input file. */ | |
6036 | ||
6037 | struct reloc_bfd_fix_struct | |
6038 | { | |
6039 | asection *src_sec; | |
6040 | bfd_vma src_offset; | |
6041 | unsigned src_type; /* Relocation type. */ | |
68ffbac6 | 6042 | |
43cd72b9 BW |
6043 | asection *target_sec; |
6044 | bfd_vma target_offset; | |
6045 | bfd_boolean translated; | |
68ffbac6 | 6046 | |
43cd72b9 BW |
6047 | reloc_bfd_fix *next; |
6048 | }; | |
6049 | ||
6050 | ||
43cd72b9 | 6051 | static reloc_bfd_fix * |
7fa3d080 BW |
6052 | reloc_bfd_fix_init (asection *src_sec, |
6053 | bfd_vma src_offset, | |
6054 | unsigned src_type, | |
7fa3d080 BW |
6055 | asection *target_sec, |
6056 | bfd_vma target_offset, | |
6057 | bfd_boolean translated) | |
43cd72b9 BW |
6058 | { |
6059 | reloc_bfd_fix *fix; | |
6060 | ||
6061 | fix = (reloc_bfd_fix *) bfd_malloc (sizeof (reloc_bfd_fix)); | |
6062 | fix->src_sec = src_sec; | |
6063 | fix->src_offset = src_offset; | |
6064 | fix->src_type = src_type; | |
43cd72b9 BW |
6065 | fix->target_sec = target_sec; |
6066 | fix->target_offset = target_offset; | |
6067 | fix->translated = translated; | |
6068 | ||
6069 | return fix; | |
6070 | } | |
6071 | ||
6072 | ||
6073 | static void | |
7fa3d080 | 6074 | add_fix (asection *src_sec, reloc_bfd_fix *fix) |
43cd72b9 BW |
6075 | { |
6076 | xtensa_relax_info *relax_info; | |
6077 | ||
6078 | relax_info = get_xtensa_relax_info (src_sec); | |
6079 | fix->next = relax_info->fix_list; | |
6080 | relax_info->fix_list = fix; | |
6081 | } | |
6082 | ||
6083 | ||
6084 | static int | |
7fa3d080 | 6085 | fix_compare (const void *ap, const void *bp) |
43cd72b9 BW |
6086 | { |
6087 | const reloc_bfd_fix *a = (const reloc_bfd_fix *) ap; | |
6088 | const reloc_bfd_fix *b = (const reloc_bfd_fix *) bp; | |
6089 | ||
6090 | if (a->src_offset != b->src_offset) | |
6091 | return (a->src_offset - b->src_offset); | |
6092 | return (a->src_type - b->src_type); | |
6093 | } | |
6094 | ||
6095 | ||
6096 | static void | |
7fa3d080 | 6097 | cache_fix_array (asection *sec) |
43cd72b9 BW |
6098 | { |
6099 | unsigned i, count = 0; | |
6100 | reloc_bfd_fix *r; | |
6101 | xtensa_relax_info *relax_info = get_xtensa_relax_info (sec); | |
6102 | ||
6103 | if (relax_info == NULL) | |
6104 | return; | |
6105 | if (relax_info->fix_list == NULL) | |
6106 | return; | |
6107 | ||
6108 | for (r = relax_info->fix_list; r != NULL; r = r->next) | |
6109 | count++; | |
6110 | ||
6111 | relax_info->fix_array = | |
6112 | (reloc_bfd_fix *) bfd_malloc (sizeof (reloc_bfd_fix) * count); | |
6113 | relax_info->fix_array_count = count; | |
6114 | ||
6115 | r = relax_info->fix_list; | |
6116 | for (i = 0; i < count; i++, r = r->next) | |
6117 | { | |
6118 | relax_info->fix_array[count - 1 - i] = *r; | |
6119 | relax_info->fix_array[count - 1 - i].next = NULL; | |
6120 | } | |
6121 | ||
6122 | qsort (relax_info->fix_array, relax_info->fix_array_count, | |
6123 | sizeof (reloc_bfd_fix), fix_compare); | |
6124 | } | |
6125 | ||
6126 | ||
6127 | static reloc_bfd_fix * | |
7fa3d080 | 6128 | get_bfd_fix (asection *sec, bfd_vma offset, unsigned type) |
43cd72b9 BW |
6129 | { |
6130 | xtensa_relax_info *relax_info = get_xtensa_relax_info (sec); | |
6131 | reloc_bfd_fix *rv; | |
6132 | reloc_bfd_fix key; | |
6133 | ||
6134 | if (relax_info == NULL) | |
6135 | return NULL; | |
6136 | if (relax_info->fix_list == NULL) | |
6137 | return NULL; | |
6138 | ||
6139 | if (relax_info->fix_array == NULL) | |
6140 | cache_fix_array (sec); | |
6141 | ||
6142 | key.src_offset = offset; | |
6143 | key.src_type = type; | |
6144 | rv = bsearch (&key, relax_info->fix_array, relax_info->fix_array_count, | |
6145 | sizeof (reloc_bfd_fix), fix_compare); | |
6146 | return rv; | |
6147 | } | |
6148 | ||
6149 | \f | |
6150 | /* Section caching. */ | |
6151 | ||
6152 | typedef struct section_cache_struct section_cache_t; | |
6153 | ||
6154 | struct section_cache_struct | |
6155 | { | |
6156 | asection *sec; | |
6157 | ||
6158 | bfd_byte *contents; /* Cache of the section contents. */ | |
6159 | bfd_size_type content_length; | |
6160 | ||
6161 | property_table_entry *ptbl; /* Cache of the section property table. */ | |
6162 | unsigned pte_count; | |
6163 | ||
6164 | Elf_Internal_Rela *relocs; /* Cache of the section relocations. */ | |
6165 | unsigned reloc_count; | |
6166 | }; | |
6167 | ||
6168 | ||
7fa3d080 BW |
6169 | static void |
6170 | init_section_cache (section_cache_t *sec_cache) | |
6171 | { | |
6172 | memset (sec_cache, 0, sizeof (*sec_cache)); | |
6173 | } | |
43cd72b9 BW |
6174 | |
6175 | ||
6176 | static void | |
65e911f9 | 6177 | free_section_cache (section_cache_t *sec_cache) |
43cd72b9 | 6178 | { |
7fa3d080 BW |
6179 | if (sec_cache->sec) |
6180 | { | |
6181 | release_contents (sec_cache->sec, sec_cache->contents); | |
6182 | release_internal_relocs (sec_cache->sec, sec_cache->relocs); | |
6183 | if (sec_cache->ptbl) | |
6184 | free (sec_cache->ptbl); | |
7fa3d080 | 6185 | } |
43cd72b9 BW |
6186 | } |
6187 | ||
6188 | ||
6189 | static bfd_boolean | |
7fa3d080 BW |
6190 | section_cache_section (section_cache_t *sec_cache, |
6191 | asection *sec, | |
6192 | struct bfd_link_info *link_info) | |
43cd72b9 BW |
6193 | { |
6194 | bfd *abfd; | |
6195 | property_table_entry *prop_table = NULL; | |
6196 | int ptblsize = 0; | |
6197 | bfd_byte *contents = NULL; | |
6198 | Elf_Internal_Rela *internal_relocs = NULL; | |
6199 | bfd_size_type sec_size; | |
6200 | ||
6201 | if (sec == NULL) | |
6202 | return FALSE; | |
6203 | if (sec == sec_cache->sec) | |
6204 | return TRUE; | |
6205 | ||
6206 | abfd = sec->owner; | |
6207 | sec_size = bfd_get_section_limit (abfd, sec); | |
6208 | ||
6209 | /* Get the contents. */ | |
6210 | contents = retrieve_contents (abfd, sec, link_info->keep_memory); | |
6211 | if (contents == NULL && sec_size != 0) | |
6212 | goto err; | |
6213 | ||
6214 | /* Get the relocations. */ | |
6215 | internal_relocs = retrieve_internal_relocs (abfd, sec, | |
6216 | link_info->keep_memory); | |
6217 | ||
6218 | /* Get the entry table. */ | |
6219 | ptblsize = xtensa_read_table_entries (abfd, sec, &prop_table, | |
6220 | XTENSA_PROP_SEC_NAME, FALSE); | |
6221 | if (ptblsize < 0) | |
6222 | goto err; | |
6223 | ||
6224 | /* Fill in the new section cache. */ | |
65e911f9 AM |
6225 | free_section_cache (sec_cache); |
6226 | init_section_cache (sec_cache); | |
43cd72b9 BW |
6227 | |
6228 | sec_cache->sec = sec; | |
6229 | sec_cache->contents = contents; | |
6230 | sec_cache->content_length = sec_size; | |
6231 | sec_cache->relocs = internal_relocs; | |
6232 | sec_cache->reloc_count = sec->reloc_count; | |
6233 | sec_cache->pte_count = ptblsize; | |
6234 | sec_cache->ptbl = prop_table; | |
6235 | ||
6236 | return TRUE; | |
6237 | ||
6238 | err: | |
6239 | release_contents (sec, contents); | |
6240 | release_internal_relocs (sec, internal_relocs); | |
6241 | if (prop_table) | |
6242 | free (prop_table); | |
6243 | return FALSE; | |
6244 | } | |
6245 | ||
43cd72b9 BW |
6246 | \f |
6247 | /* Extended basic blocks. */ | |
6248 | ||
6249 | /* An ebb_struct represents an Extended Basic Block. Within this | |
6250 | range, we guarantee that all instructions are decodable, the | |
6251 | property table entries are contiguous, and no property table | |
6252 | specifies a segment that cannot have instructions moved. This | |
6253 | structure contains caches of the contents, property table and | |
6254 | relocations for the specified section for easy use. The range is | |
6255 | specified by ranges of indices for the byte offset, property table | |
6256 | offsets and relocation offsets. These must be consistent. */ | |
6257 | ||
6258 | typedef struct ebb_struct ebb_t; | |
6259 | ||
6260 | struct ebb_struct | |
6261 | { | |
6262 | asection *sec; | |
6263 | ||
6264 | bfd_byte *contents; /* Cache of the section contents. */ | |
6265 | bfd_size_type content_length; | |
6266 | ||
6267 | property_table_entry *ptbl; /* Cache of the section property table. */ | |
6268 | unsigned pte_count; | |
6269 | ||
6270 | Elf_Internal_Rela *relocs; /* Cache of the section relocations. */ | |
6271 | unsigned reloc_count; | |
6272 | ||
6273 | bfd_vma start_offset; /* Offset in section. */ | |
6274 | unsigned start_ptbl_idx; /* Offset in the property table. */ | |
6275 | unsigned start_reloc_idx; /* Offset in the relocations. */ | |
6276 | ||
6277 | bfd_vma end_offset; | |
6278 | unsigned end_ptbl_idx; | |
6279 | unsigned end_reloc_idx; | |
6280 | ||
6281 | bfd_boolean ends_section; /* Is this the last ebb in a section? */ | |
6282 | ||
6283 | /* The unreachable property table at the end of this set of blocks; | |
6284 | NULL if the end is not an unreachable block. */ | |
6285 | property_table_entry *ends_unreachable; | |
6286 | }; | |
6287 | ||
6288 | ||
6289 | enum ebb_target_enum | |
6290 | { | |
6291 | EBB_NO_ALIGN = 0, | |
6292 | EBB_DESIRE_TGT_ALIGN, | |
6293 | EBB_REQUIRE_TGT_ALIGN, | |
6294 | EBB_REQUIRE_LOOP_ALIGN, | |
6295 | EBB_REQUIRE_ALIGN | |
6296 | }; | |
6297 | ||
6298 | ||
6299 | /* proposed_action_struct is similar to the text_action_struct except | |
6300 | that is represents a potential transformation, not one that will | |
6301 | occur. We build a list of these for an extended basic block | |
6302 | and use them to compute the actual actions desired. We must be | |
6303 | careful that the entire set of actual actions we perform do not | |
6304 | break any relocations that would fit if the actions were not | |
6305 | performed. */ | |
6306 | ||
6307 | typedef struct proposed_action_struct proposed_action; | |
6308 | ||
6309 | struct proposed_action_struct | |
6310 | { | |
6311 | enum ebb_target_enum align_type; /* for the target alignment */ | |
6312 | bfd_vma alignment_pow; | |
6313 | text_action_t action; | |
6314 | bfd_vma offset; | |
6315 | int removed_bytes; | |
6316 | bfd_boolean do_action; /* If false, then we will not perform the action. */ | |
6317 | }; | |
6318 | ||
6319 | ||
6320 | /* The ebb_constraint_struct keeps a set of proposed actions for an | |
6321 | extended basic block. */ | |
6322 | ||
6323 | typedef struct ebb_constraint_struct ebb_constraint; | |
6324 | ||
6325 | struct ebb_constraint_struct | |
6326 | { | |
6327 | ebb_t ebb; | |
6328 | bfd_boolean start_movable; | |
6329 | ||
6330 | /* Bytes of extra space at the beginning if movable. */ | |
6331 | int start_extra_space; | |
6332 | ||
6333 | enum ebb_target_enum start_align; | |
6334 | ||
6335 | bfd_boolean end_movable; | |
6336 | ||
6337 | /* Bytes of extra space at the end if movable. */ | |
6338 | int end_extra_space; | |
6339 | ||
6340 | unsigned action_count; | |
6341 | unsigned action_allocated; | |
6342 | ||
6343 | /* Array of proposed actions. */ | |
6344 | proposed_action *actions; | |
6345 | ||
6346 | /* Action alignments -- one for each proposed action. */ | |
6347 | enum ebb_target_enum *action_aligns; | |
6348 | }; | |
6349 | ||
6350 | ||
43cd72b9 | 6351 | static void |
7fa3d080 | 6352 | init_ebb_constraint (ebb_constraint *c) |
43cd72b9 BW |
6353 | { |
6354 | memset (c, 0, sizeof (ebb_constraint)); | |
6355 | } | |
6356 | ||
6357 | ||
6358 | static void | |
7fa3d080 | 6359 | free_ebb_constraint (ebb_constraint *c) |
43cd72b9 | 6360 | { |
7fa3d080 | 6361 | if (c->actions) |
43cd72b9 BW |
6362 | free (c->actions); |
6363 | } | |
6364 | ||
6365 | ||
6366 | static void | |
7fa3d080 BW |
6367 | init_ebb (ebb_t *ebb, |
6368 | asection *sec, | |
6369 | bfd_byte *contents, | |
6370 | bfd_size_type content_length, | |
6371 | property_table_entry *prop_table, | |
6372 | unsigned ptblsize, | |
6373 | Elf_Internal_Rela *internal_relocs, | |
6374 | unsigned reloc_count) | |
43cd72b9 BW |
6375 | { |
6376 | memset (ebb, 0, sizeof (ebb_t)); | |
6377 | ebb->sec = sec; | |
6378 | ebb->contents = contents; | |
6379 | ebb->content_length = content_length; | |
6380 | ebb->ptbl = prop_table; | |
6381 | ebb->pte_count = ptblsize; | |
6382 | ebb->relocs = internal_relocs; | |
6383 | ebb->reloc_count = reloc_count; | |
6384 | ebb->start_offset = 0; | |
6385 | ebb->end_offset = ebb->content_length - 1; | |
6386 | ebb->start_ptbl_idx = 0; | |
6387 | ebb->end_ptbl_idx = ptblsize; | |
6388 | ebb->start_reloc_idx = 0; | |
6389 | ebb->end_reloc_idx = reloc_count; | |
6390 | } | |
6391 | ||
6392 | ||
6393 | /* Extend the ebb to all decodable contiguous sections. The algorithm | |
6394 | for building a basic block around an instruction is to push it | |
6395 | forward until we hit the end of a section, an unreachable block or | |
6396 | a block that cannot be transformed. Then we push it backwards | |
6397 | searching for similar conditions. */ | |
6398 | ||
7fa3d080 BW |
6399 | static bfd_boolean extend_ebb_bounds_forward (ebb_t *); |
6400 | static bfd_boolean extend_ebb_bounds_backward (ebb_t *); | |
6401 | static bfd_size_type insn_block_decodable_len | |
6402 | (bfd_byte *, bfd_size_type, bfd_vma, bfd_size_type); | |
6403 | ||
43cd72b9 | 6404 | static bfd_boolean |
7fa3d080 | 6405 | extend_ebb_bounds (ebb_t *ebb) |
43cd72b9 BW |
6406 | { |
6407 | if (!extend_ebb_bounds_forward (ebb)) | |
6408 | return FALSE; | |
6409 | if (!extend_ebb_bounds_backward (ebb)) | |
6410 | return FALSE; | |
6411 | return TRUE; | |
6412 | } | |
6413 | ||
6414 | ||
6415 | static bfd_boolean | |
7fa3d080 | 6416 | extend_ebb_bounds_forward (ebb_t *ebb) |
43cd72b9 BW |
6417 | { |
6418 | property_table_entry *the_entry, *new_entry; | |
6419 | ||
6420 | the_entry = &ebb->ptbl[ebb->end_ptbl_idx]; | |
6421 | ||
6422 | /* Stop when (1) we cannot decode an instruction, (2) we are at | |
6423 | the end of the property tables, (3) we hit a non-contiguous property | |
6424 | table entry, (4) we hit a NO_TRANSFORM region. */ | |
6425 | ||
6426 | while (1) | |
6427 | { | |
6428 | bfd_vma entry_end; | |
6429 | bfd_size_type insn_block_len; | |
6430 | ||
6431 | entry_end = the_entry->address - ebb->sec->vma + the_entry->size; | |
6432 | insn_block_len = | |
6433 | insn_block_decodable_len (ebb->contents, ebb->content_length, | |
6434 | ebb->end_offset, | |
6435 | entry_end - ebb->end_offset); | |
6436 | if (insn_block_len != (entry_end - ebb->end_offset)) | |
6437 | { | |
4eca0228 | 6438 | _bfd_error_handler |
695344c0 | 6439 | /* xgettext:c-format */ |
2dcf00ce | 6440 | (_("%pB(%pA+%#" PRIx64 "): could not decode instruction; " |
d42c267e | 6441 | "possible configuration mismatch"), |
2dcf00ce AM |
6442 | ebb->sec->owner, ebb->sec, |
6443 | (uint64_t) (ebb->end_offset + insn_block_len)); | |
43cd72b9 BW |
6444 | return FALSE; |
6445 | } | |
6446 | ebb->end_offset += insn_block_len; | |
6447 | ||
6448 | if (ebb->end_offset == ebb->sec->size) | |
6449 | ebb->ends_section = TRUE; | |
6450 | ||
6451 | /* Update the reloc counter. */ | |
6452 | while (ebb->end_reloc_idx + 1 < ebb->reloc_count | |
6453 | && (ebb->relocs[ebb->end_reloc_idx + 1].r_offset | |
6454 | < ebb->end_offset)) | |
6455 | { | |
6456 | ebb->end_reloc_idx++; | |
6457 | } | |
6458 | ||
6459 | if (ebb->end_ptbl_idx + 1 == ebb->pte_count) | |
6460 | return TRUE; | |
6461 | ||
6462 | new_entry = &ebb->ptbl[ebb->end_ptbl_idx + 1]; | |
6463 | if (((new_entry->flags & XTENSA_PROP_INSN) == 0) | |
99ded152 | 6464 | || ((new_entry->flags & XTENSA_PROP_NO_TRANSFORM) != 0) |
43cd72b9 BW |
6465 | || ((the_entry->flags & XTENSA_PROP_ALIGN) != 0)) |
6466 | break; | |
6467 | ||
6468 | if (the_entry->address + the_entry->size != new_entry->address) | |
6469 | break; | |
6470 | ||
6471 | the_entry = new_entry; | |
6472 | ebb->end_ptbl_idx++; | |
6473 | } | |
6474 | ||
6475 | /* Quick check for an unreachable or end of file just at the end. */ | |
6476 | if (ebb->end_ptbl_idx + 1 == ebb->pte_count) | |
6477 | { | |
6478 | if (ebb->end_offset == ebb->content_length) | |
6479 | ebb->ends_section = TRUE; | |
6480 | } | |
6481 | else | |
6482 | { | |
6483 | new_entry = &ebb->ptbl[ebb->end_ptbl_idx + 1]; | |
6484 | if ((new_entry->flags & XTENSA_PROP_UNREACHABLE) != 0 | |
6485 | && the_entry->address + the_entry->size == new_entry->address) | |
6486 | ebb->ends_unreachable = new_entry; | |
6487 | } | |
6488 | ||
6489 | /* Any other ending requires exact alignment. */ | |
6490 | return TRUE; | |
6491 | } | |
6492 | ||
6493 | ||
6494 | static bfd_boolean | |
7fa3d080 | 6495 | extend_ebb_bounds_backward (ebb_t *ebb) |
43cd72b9 BW |
6496 | { |
6497 | property_table_entry *the_entry, *new_entry; | |
6498 | ||
6499 | the_entry = &ebb->ptbl[ebb->start_ptbl_idx]; | |
6500 | ||
6501 | /* Stop when (1) we cannot decode the instructions in the current entry. | |
6502 | (2) we are at the beginning of the property tables, (3) we hit a | |
6503 | non-contiguous property table entry, (4) we hit a NO_TRANSFORM region. */ | |
6504 | ||
6505 | while (1) | |
6506 | { | |
6507 | bfd_vma block_begin; | |
6508 | bfd_size_type insn_block_len; | |
6509 | ||
6510 | block_begin = the_entry->address - ebb->sec->vma; | |
6511 | insn_block_len = | |
6512 | insn_block_decodable_len (ebb->contents, ebb->content_length, | |
6513 | block_begin, | |
6514 | ebb->start_offset - block_begin); | |
6515 | if (insn_block_len != ebb->start_offset - block_begin) | |
6516 | { | |
4eca0228 | 6517 | _bfd_error_handler |
695344c0 | 6518 | /* xgettext:c-format */ |
2dcf00ce | 6519 | (_("%pB(%pA+%#" PRIx64 "): could not decode instruction; " |
d42c267e | 6520 | "possible configuration mismatch"), |
2dcf00ce AM |
6521 | ebb->sec->owner, ebb->sec, |
6522 | (uint64_t) (ebb->end_offset + insn_block_len)); | |
43cd72b9 BW |
6523 | return FALSE; |
6524 | } | |
6525 | ebb->start_offset -= insn_block_len; | |
6526 | ||
6527 | /* Update the reloc counter. */ | |
6528 | while (ebb->start_reloc_idx > 0 | |
6529 | && (ebb->relocs[ebb->start_reloc_idx - 1].r_offset | |
6530 | >= ebb->start_offset)) | |
6531 | { | |
6532 | ebb->start_reloc_idx--; | |
6533 | } | |
6534 | ||
6535 | if (ebb->start_ptbl_idx == 0) | |
6536 | return TRUE; | |
6537 | ||
6538 | new_entry = &ebb->ptbl[ebb->start_ptbl_idx - 1]; | |
6539 | if ((new_entry->flags & XTENSA_PROP_INSN) == 0 | |
99ded152 | 6540 | || ((new_entry->flags & XTENSA_PROP_NO_TRANSFORM) != 0) |
43cd72b9 BW |
6541 | || ((new_entry->flags & XTENSA_PROP_ALIGN) != 0)) |
6542 | return TRUE; | |
6543 | if (new_entry->address + new_entry->size != the_entry->address) | |
6544 | return TRUE; | |
6545 | ||
6546 | the_entry = new_entry; | |
6547 | ebb->start_ptbl_idx--; | |
6548 | } | |
6549 | return TRUE; | |
6550 | } | |
6551 | ||
6552 | ||
6553 | static bfd_size_type | |
7fa3d080 BW |
6554 | insn_block_decodable_len (bfd_byte *contents, |
6555 | bfd_size_type content_len, | |
6556 | bfd_vma block_offset, | |
6557 | bfd_size_type block_len) | |
43cd72b9 BW |
6558 | { |
6559 | bfd_vma offset = block_offset; | |
6560 | ||
6561 | while (offset < block_offset + block_len) | |
6562 | { | |
6563 | bfd_size_type insn_len = 0; | |
6564 | ||
6565 | insn_len = insn_decode_len (contents, content_len, offset); | |
6566 | if (insn_len == 0) | |
6567 | return (offset - block_offset); | |
6568 | offset += insn_len; | |
6569 | } | |
6570 | return (offset - block_offset); | |
6571 | } | |
6572 | ||
6573 | ||
6574 | static void | |
7fa3d080 | 6575 | ebb_propose_action (ebb_constraint *c, |
7fa3d080 | 6576 | enum ebb_target_enum align_type, |
288f74fa | 6577 | bfd_vma alignment_pow, |
7fa3d080 BW |
6578 | text_action_t action, |
6579 | bfd_vma offset, | |
6580 | int removed_bytes, | |
6581 | bfd_boolean do_action) | |
43cd72b9 | 6582 | { |
b08b5071 | 6583 | proposed_action *act; |
43cd72b9 | 6584 | |
43cd72b9 BW |
6585 | if (c->action_allocated <= c->action_count) |
6586 | { | |
b08b5071 | 6587 | unsigned new_allocated, i; |
823fc61f | 6588 | proposed_action *new_actions; |
b08b5071 BW |
6589 | |
6590 | new_allocated = (c->action_count + 2) * 2; | |
823fc61f | 6591 | new_actions = (proposed_action *) |
43cd72b9 BW |
6592 | bfd_zmalloc (sizeof (proposed_action) * new_allocated); |
6593 | ||
6594 | for (i = 0; i < c->action_count; i++) | |
6595 | new_actions[i] = c->actions[i]; | |
7fa3d080 | 6596 | if (c->actions) |
43cd72b9 BW |
6597 | free (c->actions); |
6598 | c->actions = new_actions; | |
6599 | c->action_allocated = new_allocated; | |
6600 | } | |
b08b5071 BW |
6601 | |
6602 | act = &c->actions[c->action_count]; | |
6603 | act->align_type = align_type; | |
6604 | act->alignment_pow = alignment_pow; | |
6605 | act->action = action; | |
6606 | act->offset = offset; | |
6607 | act->removed_bytes = removed_bytes; | |
6608 | act->do_action = do_action; | |
6609 | ||
43cd72b9 BW |
6610 | c->action_count++; |
6611 | } | |
6612 | ||
6613 | \f | |
6614 | /* Access to internal relocations, section contents and symbols. */ | |
6615 | ||
6616 | /* During relaxation, we need to modify relocations, section contents, | |
6617 | and symbol definitions, and we need to keep the original values from | |
6618 | being reloaded from the input files, i.e., we need to "pin" the | |
6619 | modified values in memory. We also want to continue to observe the | |
6620 | setting of the "keep-memory" flag. The following functions wrap the | |
6621 | standard BFD functions to take care of this for us. */ | |
6622 | ||
6623 | static Elf_Internal_Rela * | |
7fa3d080 | 6624 | retrieve_internal_relocs (bfd *abfd, asection *sec, bfd_boolean keep_memory) |
43cd72b9 BW |
6625 | { |
6626 | Elf_Internal_Rela *internal_relocs; | |
6627 | ||
6628 | if ((sec->flags & SEC_LINKER_CREATED) != 0) | |
6629 | return NULL; | |
6630 | ||
6631 | internal_relocs = elf_section_data (sec)->relocs; | |
6632 | if (internal_relocs == NULL) | |
6633 | internal_relocs = (_bfd_elf_link_read_relocs | |
7fa3d080 | 6634 | (abfd, sec, NULL, NULL, keep_memory)); |
43cd72b9 BW |
6635 | return internal_relocs; |
6636 | } | |
6637 | ||
6638 | ||
6639 | static void | |
7fa3d080 | 6640 | pin_internal_relocs (asection *sec, Elf_Internal_Rela *internal_relocs) |
43cd72b9 BW |
6641 | { |
6642 | elf_section_data (sec)->relocs = internal_relocs; | |
6643 | } | |
6644 | ||
6645 | ||
6646 | static void | |
7fa3d080 | 6647 | release_internal_relocs (asection *sec, Elf_Internal_Rela *internal_relocs) |
43cd72b9 BW |
6648 | { |
6649 | if (internal_relocs | |
6650 | && elf_section_data (sec)->relocs != internal_relocs) | |
6651 | free (internal_relocs); | |
6652 | } | |
6653 | ||
6654 | ||
6655 | static bfd_byte * | |
7fa3d080 | 6656 | retrieve_contents (bfd *abfd, asection *sec, bfd_boolean keep_memory) |
43cd72b9 BW |
6657 | { |
6658 | bfd_byte *contents; | |
6659 | bfd_size_type sec_size; | |
6660 | ||
6661 | sec_size = bfd_get_section_limit (abfd, sec); | |
6662 | contents = elf_section_data (sec)->this_hdr.contents; | |
68ffbac6 | 6663 | |
43cd72b9 BW |
6664 | if (contents == NULL && sec_size != 0) |
6665 | { | |
6666 | if (!bfd_malloc_and_get_section (abfd, sec, &contents)) | |
6667 | { | |
7fa3d080 | 6668 | if (contents) |
43cd72b9 BW |
6669 | free (contents); |
6670 | return NULL; | |
6671 | } | |
68ffbac6 | 6672 | if (keep_memory) |
43cd72b9 BW |
6673 | elf_section_data (sec)->this_hdr.contents = contents; |
6674 | } | |
6675 | return contents; | |
6676 | } | |
6677 | ||
6678 | ||
6679 | static void | |
7fa3d080 | 6680 | pin_contents (asection *sec, bfd_byte *contents) |
43cd72b9 BW |
6681 | { |
6682 | elf_section_data (sec)->this_hdr.contents = contents; | |
6683 | } | |
6684 | ||
6685 | ||
6686 | static void | |
7fa3d080 | 6687 | release_contents (asection *sec, bfd_byte *contents) |
43cd72b9 BW |
6688 | { |
6689 | if (contents && elf_section_data (sec)->this_hdr.contents != contents) | |
6690 | free (contents); | |
6691 | } | |
6692 | ||
6693 | ||
6694 | static Elf_Internal_Sym * | |
7fa3d080 | 6695 | retrieve_local_syms (bfd *input_bfd) |
43cd72b9 BW |
6696 | { |
6697 | Elf_Internal_Shdr *symtab_hdr; | |
6698 | Elf_Internal_Sym *isymbuf; | |
6699 | size_t locsymcount; | |
6700 | ||
6701 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
6702 | locsymcount = symtab_hdr->sh_info; | |
6703 | ||
6704 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; | |
6705 | if (isymbuf == NULL && locsymcount != 0) | |
6706 | isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr, locsymcount, 0, | |
6707 | NULL, NULL, NULL); | |
6708 | ||
6709 | /* Save the symbols for this input file so they won't be read again. */ | |
6710 | if (isymbuf && isymbuf != (Elf_Internal_Sym *) symtab_hdr->contents) | |
6711 | symtab_hdr->contents = (unsigned char *) isymbuf; | |
6712 | ||
6713 | return isymbuf; | |
6714 | } | |
6715 | ||
6716 | \f | |
6717 | /* Code for link-time relaxation. */ | |
6718 | ||
6719 | /* Initialization for relaxation: */ | |
7fa3d080 | 6720 | static bfd_boolean analyze_relocations (struct bfd_link_info *); |
43cd72b9 | 6721 | static bfd_boolean find_relaxable_sections |
7fa3d080 | 6722 | (bfd *, asection *, struct bfd_link_info *, bfd_boolean *); |
43cd72b9 | 6723 | static bfd_boolean collect_source_relocs |
7fa3d080 | 6724 | (bfd *, asection *, struct bfd_link_info *); |
43cd72b9 | 6725 | static bfd_boolean is_resolvable_asm_expansion |
7fa3d080 BW |
6726 | (bfd *, asection *, bfd_byte *, Elf_Internal_Rela *, struct bfd_link_info *, |
6727 | bfd_boolean *); | |
43cd72b9 | 6728 | static Elf_Internal_Rela *find_associated_l32r_irel |
7fa3d080 | 6729 | (bfd *, asection *, bfd_byte *, Elf_Internal_Rela *, Elf_Internal_Rela *); |
43cd72b9 | 6730 | static bfd_boolean compute_text_actions |
7fa3d080 BW |
6731 | (bfd *, asection *, struct bfd_link_info *); |
6732 | static bfd_boolean compute_ebb_proposed_actions (ebb_constraint *); | |
6733 | static bfd_boolean compute_ebb_actions (ebb_constraint *); | |
b2b326d2 | 6734 | typedef struct reloc_range_list_struct reloc_range_list; |
43cd72b9 | 6735 | static bfd_boolean check_section_ebb_pcrels_fit |
b2b326d2 MF |
6736 | (bfd *, asection *, bfd_byte *, Elf_Internal_Rela *, |
6737 | reloc_range_list *, const ebb_constraint *, | |
cb337148 | 6738 | const xtensa_opcode *); |
7fa3d080 | 6739 | static bfd_boolean check_section_ebb_reduces (const ebb_constraint *); |
43cd72b9 | 6740 | static void text_action_add_proposed |
7fa3d080 | 6741 | (text_action_list *, const ebb_constraint *, asection *); |
43cd72b9 BW |
6742 | |
6743 | /* First pass: */ | |
6744 | static bfd_boolean compute_removed_literals | |
7fa3d080 | 6745 | (bfd *, asection *, struct bfd_link_info *, value_map_hash_table *); |
43cd72b9 | 6746 | static Elf_Internal_Rela *get_irel_at_offset |
7fa3d080 | 6747 | (asection *, Elf_Internal_Rela *, bfd_vma); |
68ffbac6 | 6748 | static bfd_boolean is_removable_literal |
99ded152 BW |
6749 | (const source_reloc *, int, const source_reloc *, int, asection *, |
6750 | property_table_entry *, int); | |
43cd72b9 | 6751 | static bfd_boolean remove_dead_literal |
7fa3d080 | 6752 | (bfd *, asection *, struct bfd_link_info *, Elf_Internal_Rela *, |
68ffbac6 | 6753 | Elf_Internal_Rela *, source_reloc *, property_table_entry *, int); |
7fa3d080 BW |
6754 | static bfd_boolean identify_literal_placement |
6755 | (bfd *, asection *, bfd_byte *, struct bfd_link_info *, | |
6756 | value_map_hash_table *, bfd_boolean *, Elf_Internal_Rela *, int, | |
6757 | source_reloc *, property_table_entry *, int, section_cache_t *, | |
6758 | bfd_boolean); | |
6759 | static bfd_boolean relocations_reach (source_reloc *, int, const r_reloc *); | |
43cd72b9 | 6760 | static bfd_boolean coalesce_shared_literal |
7fa3d080 | 6761 | (asection *, source_reloc *, property_table_entry *, int, value_map *); |
43cd72b9 | 6762 | static bfd_boolean move_shared_literal |
7fa3d080 BW |
6763 | (asection *, struct bfd_link_info *, source_reloc *, property_table_entry *, |
6764 | int, const r_reloc *, const literal_value *, section_cache_t *); | |
43cd72b9 BW |
6765 | |
6766 | /* Second pass: */ | |
7fa3d080 BW |
6767 | static bfd_boolean relax_section (bfd *, asection *, struct bfd_link_info *); |
6768 | static bfd_boolean translate_section_fixes (asection *); | |
6769 | static bfd_boolean translate_reloc_bfd_fix (reloc_bfd_fix *); | |
9b7f5d20 | 6770 | static asection *translate_reloc (const r_reloc *, r_reloc *, asection *); |
43cd72b9 | 6771 | static void shrink_dynamic_reloc_sections |
7fa3d080 | 6772 | (struct bfd_link_info *, bfd *, asection *, Elf_Internal_Rela *); |
43cd72b9 | 6773 | static bfd_boolean move_literal |
7fa3d080 BW |
6774 | (bfd *, struct bfd_link_info *, asection *, bfd_vma, bfd_byte *, |
6775 | xtensa_relax_info *, Elf_Internal_Rela **, const literal_value *); | |
43cd72b9 | 6776 | static bfd_boolean relax_property_section |
7fa3d080 | 6777 | (bfd *, asection *, struct bfd_link_info *); |
43cd72b9 BW |
6778 | |
6779 | /* Third pass: */ | |
7fa3d080 | 6780 | static bfd_boolean relax_section_symbols (bfd *, asection *); |
43cd72b9 BW |
6781 | |
6782 | ||
68ffbac6 | 6783 | static bfd_boolean |
7fa3d080 BW |
6784 | elf_xtensa_relax_section (bfd *abfd, |
6785 | asection *sec, | |
6786 | struct bfd_link_info *link_info, | |
6787 | bfd_boolean *again) | |
43cd72b9 BW |
6788 | { |
6789 | static value_map_hash_table *values = NULL; | |
6790 | static bfd_boolean relocations_analyzed = FALSE; | |
6791 | xtensa_relax_info *relax_info; | |
6792 | ||
6793 | if (!relocations_analyzed) | |
6794 | { | |
6795 | /* Do some overall initialization for relaxation. */ | |
6796 | values = value_map_hash_table_init (); | |
6797 | if (values == NULL) | |
6798 | return FALSE; | |
6799 | relaxing_section = TRUE; | |
6800 | if (!analyze_relocations (link_info)) | |
6801 | return FALSE; | |
6802 | relocations_analyzed = TRUE; | |
6803 | } | |
6804 | *again = FALSE; | |
6805 | ||
6806 | /* Don't mess with linker-created sections. */ | |
6807 | if ((sec->flags & SEC_LINKER_CREATED) != 0) | |
6808 | return TRUE; | |
6809 | ||
6810 | relax_info = get_xtensa_relax_info (sec); | |
6811 | BFD_ASSERT (relax_info != NULL); | |
6812 | ||
6813 | switch (relax_info->visited) | |
6814 | { | |
6815 | case 0: | |
6816 | /* Note: It would be nice to fold this pass into | |
6817 | analyze_relocations, but it is important for this step that the | |
6818 | sections be examined in link order. */ | |
6819 | if (!compute_removed_literals (abfd, sec, link_info, values)) | |
6820 | return FALSE; | |
6821 | *again = TRUE; | |
6822 | break; | |
6823 | ||
6824 | case 1: | |
6825 | if (values) | |
6826 | value_map_hash_table_delete (values); | |
6827 | values = NULL; | |
6828 | if (!relax_section (abfd, sec, link_info)) | |
6829 | return FALSE; | |
6830 | *again = TRUE; | |
6831 | break; | |
6832 | ||
6833 | case 2: | |
6834 | if (!relax_section_symbols (abfd, sec)) | |
6835 | return FALSE; | |
6836 | break; | |
6837 | } | |
6838 | ||
6839 | relax_info->visited++; | |
6840 | return TRUE; | |
6841 | } | |
6842 | ||
6843 | \f | |
6844 | /* Initialization for relaxation. */ | |
6845 | ||
6846 | /* This function is called once at the start of relaxation. It scans | |
6847 | all the input sections and marks the ones that are relaxable (i.e., | |
6848 | literal sections with L32R relocations against them), and then | |
6849 | collects source_reloc information for all the relocations against | |
6850 | those relaxable sections. During this process, it also detects | |
6851 | longcalls, i.e., calls relaxed by the assembler into indirect | |
6852 | calls, that can be optimized back into direct calls. Within each | |
6853 | extended basic block (ebb) containing an optimized longcall, it | |
6854 | computes a set of "text actions" that can be performed to remove | |
6855 | the L32R associated with the longcall while optionally preserving | |
6856 | branch target alignments. */ | |
6857 | ||
6858 | static bfd_boolean | |
7fa3d080 | 6859 | analyze_relocations (struct bfd_link_info *link_info) |
43cd72b9 BW |
6860 | { |
6861 | bfd *abfd; | |
6862 | asection *sec; | |
6863 | bfd_boolean is_relaxable = FALSE; | |
6864 | ||
6865 | /* Initialize the per-section relaxation info. */ | |
c72f2fb2 | 6866 | for (abfd = link_info->input_bfds; abfd != NULL; abfd = abfd->link.next) |
43cd72b9 BW |
6867 | for (sec = abfd->sections; sec != NULL; sec = sec->next) |
6868 | { | |
6869 | init_xtensa_relax_info (sec); | |
6870 | } | |
6871 | ||
6872 | /* Mark relaxable sections (and count relocations against each one). */ | |
c72f2fb2 | 6873 | for (abfd = link_info->input_bfds; abfd != NULL; abfd = abfd->link.next) |
43cd72b9 BW |
6874 | for (sec = abfd->sections; sec != NULL; sec = sec->next) |
6875 | { | |
6876 | if (!find_relaxable_sections (abfd, sec, link_info, &is_relaxable)) | |
6877 | return FALSE; | |
6878 | } | |
6879 | ||
6880 | /* Bail out if there are no relaxable sections. */ | |
6881 | if (!is_relaxable) | |
6882 | return TRUE; | |
6883 | ||
6884 | /* Allocate space for source_relocs. */ | |
c72f2fb2 | 6885 | for (abfd = link_info->input_bfds; abfd != NULL; abfd = abfd->link.next) |
43cd72b9 BW |
6886 | for (sec = abfd->sections; sec != NULL; sec = sec->next) |
6887 | { | |
6888 | xtensa_relax_info *relax_info; | |
6889 | ||
6890 | relax_info = get_xtensa_relax_info (sec); | |
6891 | if (relax_info->is_relaxable_literal_section | |
6892 | || relax_info->is_relaxable_asm_section) | |
6893 | { | |
6894 | relax_info->src_relocs = (source_reloc *) | |
6895 | bfd_malloc (relax_info->src_count * sizeof (source_reloc)); | |
6896 | } | |
25c6282a BW |
6897 | else |
6898 | relax_info->src_count = 0; | |
43cd72b9 BW |
6899 | } |
6900 | ||
6901 | /* Collect info on relocations against each relaxable section. */ | |
c72f2fb2 | 6902 | for (abfd = link_info->input_bfds; abfd != NULL; abfd = abfd->link.next) |
43cd72b9 BW |
6903 | for (sec = abfd->sections; sec != NULL; sec = sec->next) |
6904 | { | |
6905 | if (!collect_source_relocs (abfd, sec, link_info)) | |
6906 | return FALSE; | |
6907 | } | |
6908 | ||
6909 | /* Compute the text actions. */ | |
c72f2fb2 | 6910 | for (abfd = link_info->input_bfds; abfd != NULL; abfd = abfd->link.next) |
43cd72b9 BW |
6911 | for (sec = abfd->sections; sec != NULL; sec = sec->next) |
6912 | { | |
6913 | if (!compute_text_actions (abfd, sec, link_info)) | |
6914 | return FALSE; | |
6915 | } | |
6916 | ||
6917 | return TRUE; | |
6918 | } | |
6919 | ||
6920 | ||
6921 | /* Find all the sections that might be relaxed. The motivation for | |
6922 | this pass is that collect_source_relocs() needs to record _all_ the | |
6923 | relocations that target each relaxable section. That is expensive | |
6924 | and unnecessary unless the target section is actually going to be | |
6925 | relaxed. This pass identifies all such sections by checking if | |
6926 | they have L32Rs pointing to them. In the process, the total number | |
6927 | of relocations targeting each section is also counted so that we | |
6928 | know how much space to allocate for source_relocs against each | |
6929 | relaxable literal section. */ | |
6930 | ||
6931 | static bfd_boolean | |
7fa3d080 BW |
6932 | find_relaxable_sections (bfd *abfd, |
6933 | asection *sec, | |
6934 | struct bfd_link_info *link_info, | |
6935 | bfd_boolean *is_relaxable_p) | |
43cd72b9 BW |
6936 | { |
6937 | Elf_Internal_Rela *internal_relocs; | |
6938 | bfd_byte *contents; | |
6939 | bfd_boolean ok = TRUE; | |
6940 | unsigned i; | |
6941 | xtensa_relax_info *source_relax_info; | |
25c6282a | 6942 | bfd_boolean is_l32r_reloc; |
43cd72b9 BW |
6943 | |
6944 | internal_relocs = retrieve_internal_relocs (abfd, sec, | |
6945 | link_info->keep_memory); | |
68ffbac6 | 6946 | if (internal_relocs == NULL) |
43cd72b9 BW |
6947 | return ok; |
6948 | ||
6949 | contents = retrieve_contents (abfd, sec, link_info->keep_memory); | |
6950 | if (contents == NULL && sec->size != 0) | |
6951 | { | |
6952 | ok = FALSE; | |
6953 | goto error_return; | |
6954 | } | |
6955 | ||
6956 | source_relax_info = get_xtensa_relax_info (sec); | |
68ffbac6 | 6957 | for (i = 0; i < sec->reloc_count; i++) |
43cd72b9 BW |
6958 | { |
6959 | Elf_Internal_Rela *irel = &internal_relocs[i]; | |
6960 | r_reloc r_rel; | |
6961 | asection *target_sec; | |
6962 | xtensa_relax_info *target_relax_info; | |
6963 | ||
6964 | /* If this section has not already been marked as "relaxable", and | |
6965 | if it contains any ASM_EXPAND relocations (marking expanded | |
6966 | longcalls) that can be optimized into direct calls, then mark | |
6967 | the section as "relaxable". */ | |
6968 | if (source_relax_info | |
6969 | && !source_relax_info->is_relaxable_asm_section | |
6970 | && ELF32_R_TYPE (irel->r_info) == R_XTENSA_ASM_EXPAND) | |
6971 | { | |
6972 | bfd_boolean is_reachable = FALSE; | |
6973 | if (is_resolvable_asm_expansion (abfd, sec, contents, irel, | |
6974 | link_info, &is_reachable) | |
6975 | && is_reachable) | |
6976 | { | |
6977 | source_relax_info->is_relaxable_asm_section = TRUE; | |
6978 | *is_relaxable_p = TRUE; | |
6979 | } | |
6980 | } | |
6981 | ||
6982 | r_reloc_init (&r_rel, abfd, irel, contents, | |
6983 | bfd_get_section_limit (abfd, sec)); | |
6984 | ||
6985 | target_sec = r_reloc_get_section (&r_rel); | |
6986 | target_relax_info = get_xtensa_relax_info (target_sec); | |
6987 | if (!target_relax_info) | |
6988 | continue; | |
6989 | ||
6990 | /* Count PC-relative operand relocations against the target section. | |
07d6d2b8 | 6991 | Note: The conditions tested here must match the conditions under |
43cd72b9 | 6992 | which init_source_reloc is called in collect_source_relocs(). */ |
25c6282a BW |
6993 | is_l32r_reloc = FALSE; |
6994 | if (is_operand_relocation (ELF32_R_TYPE (irel->r_info))) | |
6995 | { | |
6996 | xtensa_opcode opcode = | |
6997 | get_relocation_opcode (abfd, sec, contents, irel); | |
6998 | if (opcode != XTENSA_UNDEFINED) | |
6999 | { | |
7000 | is_l32r_reloc = (opcode == get_l32r_opcode ()); | |
7001 | if (!is_alt_relocation (ELF32_R_TYPE (irel->r_info)) | |
7002 | || is_l32r_reloc) | |
7003 | target_relax_info->src_count++; | |
7004 | } | |
7005 | } | |
43cd72b9 | 7006 | |
25c6282a | 7007 | if (is_l32r_reloc && r_reloc_is_defined (&r_rel)) |
43cd72b9 BW |
7008 | { |
7009 | /* Mark the target section as relaxable. */ | |
7010 | target_relax_info->is_relaxable_literal_section = TRUE; | |
7011 | *is_relaxable_p = TRUE; | |
7012 | } | |
7013 | } | |
7014 | ||
7015 | error_return: | |
7016 | release_contents (sec, contents); | |
7017 | release_internal_relocs (sec, internal_relocs); | |
7018 | return ok; | |
7019 | } | |
7020 | ||
7021 | ||
7022 | /* Record _all_ the relocations that point to relaxable sections, and | |
7023 | get rid of ASM_EXPAND relocs by either converting them to | |
7024 | ASM_SIMPLIFY or by removing them. */ | |
7025 | ||
7026 | static bfd_boolean | |
7fa3d080 BW |
7027 | collect_source_relocs (bfd *abfd, |
7028 | asection *sec, | |
7029 | struct bfd_link_info *link_info) | |
43cd72b9 BW |
7030 | { |
7031 | Elf_Internal_Rela *internal_relocs; | |
7032 | bfd_byte *contents; | |
7033 | bfd_boolean ok = TRUE; | |
7034 | unsigned i; | |
7035 | bfd_size_type sec_size; | |
7036 | ||
68ffbac6 | 7037 | internal_relocs = retrieve_internal_relocs (abfd, sec, |
43cd72b9 | 7038 | link_info->keep_memory); |
68ffbac6 | 7039 | if (internal_relocs == NULL) |
43cd72b9 BW |
7040 | return ok; |
7041 | ||
7042 | sec_size = bfd_get_section_limit (abfd, sec); | |
7043 | contents = retrieve_contents (abfd, sec, link_info->keep_memory); | |
7044 | if (contents == NULL && sec_size != 0) | |
7045 | { | |
7046 | ok = FALSE; | |
7047 | goto error_return; | |
7048 | } | |
7049 | ||
7050 | /* Record relocations against relaxable literal sections. */ | |
68ffbac6 | 7051 | for (i = 0; i < sec->reloc_count; i++) |
43cd72b9 BW |
7052 | { |
7053 | Elf_Internal_Rela *irel = &internal_relocs[i]; | |
7054 | r_reloc r_rel; | |
7055 | asection *target_sec; | |
7056 | xtensa_relax_info *target_relax_info; | |
7057 | ||
7058 | r_reloc_init (&r_rel, abfd, irel, contents, sec_size); | |
7059 | ||
7060 | target_sec = r_reloc_get_section (&r_rel); | |
7061 | target_relax_info = get_xtensa_relax_info (target_sec); | |
7062 | ||
7063 | if (target_relax_info | |
7064 | && (target_relax_info->is_relaxable_literal_section | |
7065 | || target_relax_info->is_relaxable_asm_section)) | |
7066 | { | |
7067 | xtensa_opcode opcode = XTENSA_UNDEFINED; | |
7068 | int opnd = -1; | |
7069 | bfd_boolean is_abs_literal = FALSE; | |
7070 | ||
7071 | if (is_alt_relocation (ELF32_R_TYPE (irel->r_info))) | |
7072 | { | |
7073 | /* None of the current alternate relocs are PC-relative, | |
7074 | and only PC-relative relocs matter here. However, we | |
7075 | still need to record the opcode for literal | |
7076 | coalescing. */ | |
7077 | opcode = get_relocation_opcode (abfd, sec, contents, irel); | |
7078 | if (opcode == get_l32r_opcode ()) | |
7079 | { | |
7080 | is_abs_literal = TRUE; | |
7081 | opnd = 1; | |
7082 | } | |
7083 | else | |
7084 | opcode = XTENSA_UNDEFINED; | |
7085 | } | |
7086 | else if (is_operand_relocation (ELF32_R_TYPE (irel->r_info))) | |
7087 | { | |
7088 | opcode = get_relocation_opcode (abfd, sec, contents, irel); | |
7089 | opnd = get_relocation_opnd (opcode, ELF32_R_TYPE (irel->r_info)); | |
7090 | } | |
7091 | ||
7092 | if (opcode != XTENSA_UNDEFINED) | |
7093 | { | |
7094 | int src_next = target_relax_info->src_next++; | |
7095 | source_reloc *s_reloc = &target_relax_info->src_relocs[src_next]; | |
7096 | ||
7097 | init_source_reloc (s_reloc, sec, &r_rel, opcode, opnd, | |
7098 | is_abs_literal); | |
7099 | } | |
7100 | } | |
7101 | } | |
7102 | ||
7103 | /* Now get rid of ASM_EXPAND relocations. At this point, the | |
7104 | src_relocs array for the target literal section may still be | |
7105 | incomplete, but it must at least contain the entries for the L32R | |
7106 | relocations associated with ASM_EXPANDs because they were just | |
7107 | added in the preceding loop over the relocations. */ | |
7108 | ||
68ffbac6 | 7109 | for (i = 0; i < sec->reloc_count; i++) |
43cd72b9 BW |
7110 | { |
7111 | Elf_Internal_Rela *irel = &internal_relocs[i]; | |
7112 | bfd_boolean is_reachable; | |
7113 | ||
7114 | if (!is_resolvable_asm_expansion (abfd, sec, contents, irel, link_info, | |
7115 | &is_reachable)) | |
7116 | continue; | |
7117 | ||
7118 | if (is_reachable) | |
7119 | { | |
7120 | Elf_Internal_Rela *l32r_irel; | |
7121 | r_reloc r_rel; | |
7122 | asection *target_sec; | |
7123 | xtensa_relax_info *target_relax_info; | |
7124 | ||
7125 | /* Mark the source_reloc for the L32R so that it will be | |
7126 | removed in compute_removed_literals(), along with the | |
7127 | associated literal. */ | |
7128 | l32r_irel = find_associated_l32r_irel (abfd, sec, contents, | |
7129 | irel, internal_relocs); | |
7130 | if (l32r_irel == NULL) | |
7131 | continue; | |
7132 | ||
7133 | r_reloc_init (&r_rel, abfd, l32r_irel, contents, sec_size); | |
7134 | ||
7135 | target_sec = r_reloc_get_section (&r_rel); | |
7136 | target_relax_info = get_xtensa_relax_info (target_sec); | |
7137 | ||
7138 | if (target_relax_info | |
7139 | && (target_relax_info->is_relaxable_literal_section | |
7140 | || target_relax_info->is_relaxable_asm_section)) | |
7141 | { | |
7142 | source_reloc *s_reloc; | |
7143 | ||
7144 | /* Search the source_relocs for the entry corresponding to | |
7145 | the l32r_irel. Note: The src_relocs array is not yet | |
7146 | sorted, but it wouldn't matter anyway because we're | |
7147 | searching by source offset instead of target offset. */ | |
68ffbac6 | 7148 | s_reloc = find_source_reloc (target_relax_info->src_relocs, |
43cd72b9 BW |
7149 | target_relax_info->src_next, |
7150 | sec, l32r_irel); | |
7151 | BFD_ASSERT (s_reloc); | |
7152 | s_reloc->is_null = TRUE; | |
7153 | } | |
7154 | ||
7155 | /* Convert this reloc to ASM_SIMPLIFY. */ | |
7156 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), | |
7157 | R_XTENSA_ASM_SIMPLIFY); | |
7158 | l32r_irel->r_info = ELF32_R_INFO (0, R_XTENSA_NONE); | |
7159 | ||
7160 | pin_internal_relocs (sec, internal_relocs); | |
7161 | } | |
7162 | else | |
7163 | { | |
7164 | /* It is resolvable but doesn't reach. We resolve now | |
7165 | by eliminating the relocation -- the call will remain | |
7166 | expanded into L32R/CALLX. */ | |
7167 | irel->r_info = ELF32_R_INFO (0, R_XTENSA_NONE); | |
7168 | pin_internal_relocs (sec, internal_relocs); | |
7169 | } | |
7170 | } | |
7171 | ||
7172 | error_return: | |
7173 | release_contents (sec, contents); | |
7174 | release_internal_relocs (sec, internal_relocs); | |
7175 | return ok; | |
7176 | } | |
7177 | ||
7178 | ||
7179 | /* Return TRUE if the asm expansion can be resolved. Generally it can | |
7180 | be resolved on a final link or when a partial link locates it in the | |
7181 | same section as the target. Set "is_reachable" flag if the target of | |
7182 | the call is within the range of a direct call, given the current VMA | |
7183 | for this section and the target section. */ | |
7184 | ||
7185 | bfd_boolean | |
7fa3d080 BW |
7186 | is_resolvable_asm_expansion (bfd *abfd, |
7187 | asection *sec, | |
7188 | bfd_byte *contents, | |
7189 | Elf_Internal_Rela *irel, | |
7190 | struct bfd_link_info *link_info, | |
7191 | bfd_boolean *is_reachable_p) | |
43cd72b9 BW |
7192 | { |
7193 | asection *target_sec; | |
7194 | bfd_vma target_offset; | |
7195 | r_reloc r_rel; | |
7196 | xtensa_opcode opcode, direct_call_opcode; | |
7197 | bfd_vma self_address; | |
7198 | bfd_vma dest_address; | |
7199 | bfd_boolean uses_l32r; | |
7200 | bfd_size_type sec_size; | |
7201 | ||
7202 | *is_reachable_p = FALSE; | |
7203 | ||
7204 | if (contents == NULL) | |
7205 | return FALSE; | |
7206 | ||
68ffbac6 | 7207 | if (ELF32_R_TYPE (irel->r_info) != R_XTENSA_ASM_EXPAND) |
43cd72b9 BW |
7208 | return FALSE; |
7209 | ||
7210 | sec_size = bfd_get_section_limit (abfd, sec); | |
7211 | opcode = get_expanded_call_opcode (contents + irel->r_offset, | |
7212 | sec_size - irel->r_offset, &uses_l32r); | |
7213 | /* Optimization of longcalls that use CONST16 is not yet implemented. */ | |
7214 | if (!uses_l32r) | |
7215 | return FALSE; | |
68ffbac6 | 7216 | |
43cd72b9 BW |
7217 | direct_call_opcode = swap_callx_for_call_opcode (opcode); |
7218 | if (direct_call_opcode == XTENSA_UNDEFINED) | |
7219 | return FALSE; | |
7220 | ||
7221 | /* Check and see that the target resolves. */ | |
7222 | r_reloc_init (&r_rel, abfd, irel, contents, sec_size); | |
7223 | if (!r_reloc_is_defined (&r_rel)) | |
7224 | return FALSE; | |
7225 | ||
7226 | target_sec = r_reloc_get_section (&r_rel); | |
7227 | target_offset = r_rel.target_offset; | |
7228 | ||
7229 | /* If the target is in a shared library, then it doesn't reach. This | |
7230 | isn't supposed to come up because the compiler should never generate | |
7231 | non-PIC calls on systems that use shared libraries, but the linker | |
7232 | shouldn't crash regardless. */ | |
7233 | if (!target_sec->output_section) | |
7234 | return FALSE; | |
68ffbac6 | 7235 | |
43cd72b9 BW |
7236 | /* For relocatable sections, we can only simplify when the output |
7237 | section of the target is the same as the output section of the | |
7238 | source. */ | |
0e1862bb | 7239 | if (bfd_link_relocatable (link_info) |
43cd72b9 BW |
7240 | && (target_sec->output_section != sec->output_section |
7241 | || is_reloc_sym_weak (abfd, irel))) | |
7242 | return FALSE; | |
7243 | ||
331ed130 SA |
7244 | if (target_sec->output_section != sec->output_section) |
7245 | { | |
7246 | /* If the two sections are sufficiently far away that relaxation | |
7247 | might take the call out of range, we can't simplify. For | |
7248 | example, a positive displacement call into another memory | |
7249 | could get moved to a lower address due to literal removal, | |
7250 | but the destination won't move, and so the displacment might | |
7251 | get larger. | |
7252 | ||
7253 | If the displacement is negative, assume the destination could | |
7254 | move as far back as the start of the output section. The | |
7255 | self_address will be at least as far into the output section | |
7256 | as it is prior to relaxation. | |
7257 | ||
7258 | If the displacement is postive, assume the destination will be in | |
7259 | it's pre-relaxed location (because relaxation only makes sections | |
7260 | smaller). The self_address could go all the way to the beginning | |
7261 | of the output section. */ | |
7262 | ||
7263 | dest_address = target_sec->output_section->vma; | |
7264 | self_address = sec->output_section->vma; | |
7265 | ||
7266 | if (sec->output_section->vma > target_sec->output_section->vma) | |
7267 | self_address += sec->output_offset + irel->r_offset + 3; | |
7268 | else | |
7269 | dest_address += bfd_get_section_limit (abfd, target_sec->output_section); | |
7270 | /* Call targets should be four-byte aligned. */ | |
7271 | dest_address = (dest_address + 3) & ~3; | |
7272 | } | |
7273 | else | |
7274 | { | |
7275 | ||
7276 | self_address = (sec->output_section->vma | |
7277 | + sec->output_offset + irel->r_offset + 3); | |
7278 | dest_address = (target_sec->output_section->vma | |
7279 | + target_sec->output_offset + target_offset); | |
7280 | } | |
68ffbac6 | 7281 | |
43cd72b9 BW |
7282 | *is_reachable_p = pcrel_reloc_fits (direct_call_opcode, 0, |
7283 | self_address, dest_address); | |
7284 | ||
7285 | if ((self_address >> CALL_SEGMENT_BITS) != | |
7286 | (dest_address >> CALL_SEGMENT_BITS)) | |
7287 | return FALSE; | |
7288 | ||
7289 | return TRUE; | |
7290 | } | |
7291 | ||
7292 | ||
7293 | static Elf_Internal_Rela * | |
7fa3d080 BW |
7294 | find_associated_l32r_irel (bfd *abfd, |
7295 | asection *sec, | |
7296 | bfd_byte *contents, | |
7297 | Elf_Internal_Rela *other_irel, | |
7298 | Elf_Internal_Rela *internal_relocs) | |
43cd72b9 BW |
7299 | { |
7300 | unsigned i; | |
e0001a05 | 7301 | |
68ffbac6 | 7302 | for (i = 0; i < sec->reloc_count; i++) |
43cd72b9 BW |
7303 | { |
7304 | Elf_Internal_Rela *irel = &internal_relocs[i]; | |
e0001a05 | 7305 | |
43cd72b9 BW |
7306 | if (irel == other_irel) |
7307 | continue; | |
7308 | if (irel->r_offset != other_irel->r_offset) | |
7309 | continue; | |
7310 | if (is_l32r_relocation (abfd, sec, contents, irel)) | |
7311 | return irel; | |
7312 | } | |
7313 | ||
7314 | return NULL; | |
e0001a05 NC |
7315 | } |
7316 | ||
7317 | ||
cb337148 BW |
7318 | static xtensa_opcode * |
7319 | build_reloc_opcodes (bfd *abfd, | |
7320 | asection *sec, | |
7321 | bfd_byte *contents, | |
7322 | Elf_Internal_Rela *internal_relocs) | |
7323 | { | |
7324 | unsigned i; | |
7325 | xtensa_opcode *reloc_opcodes = | |
7326 | (xtensa_opcode *) bfd_malloc (sizeof (xtensa_opcode) * sec->reloc_count); | |
7327 | for (i = 0; i < sec->reloc_count; i++) | |
7328 | { | |
7329 | Elf_Internal_Rela *irel = &internal_relocs[i]; | |
7330 | reloc_opcodes[i] = get_relocation_opcode (abfd, sec, contents, irel); | |
7331 | } | |
7332 | return reloc_opcodes; | |
7333 | } | |
7334 | ||
b2b326d2 MF |
7335 | struct reloc_range_struct |
7336 | { | |
7337 | bfd_vma addr; | |
7338 | bfd_boolean add; /* TRUE if start of a range, FALSE otherwise. */ | |
7339 | /* Original irel index in the array of relocations for a section. */ | |
7340 | unsigned irel_index; | |
7341 | }; | |
7342 | typedef struct reloc_range_struct reloc_range; | |
7343 | ||
7344 | typedef struct reloc_range_list_entry_struct reloc_range_list_entry; | |
7345 | struct reloc_range_list_entry_struct | |
7346 | { | |
7347 | reloc_range_list_entry *next; | |
7348 | reloc_range_list_entry *prev; | |
7349 | Elf_Internal_Rela *irel; | |
7350 | xtensa_opcode opcode; | |
7351 | int opnum; | |
7352 | }; | |
7353 | ||
7354 | struct reloc_range_list_struct | |
7355 | { | |
7356 | /* The rest of the structure is only meaningful when ok is TRUE. */ | |
7357 | bfd_boolean ok; | |
7358 | ||
7359 | unsigned n_range; /* Number of range markers. */ | |
7360 | reloc_range *range; /* Sorted range markers. */ | |
7361 | ||
7362 | unsigned first; /* Index of a first range element in the list. */ | |
7363 | unsigned last; /* One past index of a last range element in the list. */ | |
7364 | ||
7365 | unsigned n_list; /* Number of list elements. */ | |
7366 | reloc_range_list_entry *reloc; /* */ | |
7367 | reloc_range_list_entry list_root; | |
7368 | }; | |
7369 | ||
7370 | static int | |
7371 | reloc_range_compare (const void *a, const void *b) | |
7372 | { | |
7373 | const reloc_range *ra = a; | |
7374 | const reloc_range *rb = b; | |
7375 | ||
7376 | if (ra->addr != rb->addr) | |
7377 | return ra->addr < rb->addr ? -1 : 1; | |
7378 | if (ra->add != rb->add) | |
7379 | return ra->add ? -1 : 1; | |
7380 | return 0; | |
7381 | } | |
7382 | ||
7383 | static void | |
7384 | build_reloc_ranges (bfd *abfd, asection *sec, | |
7385 | bfd_byte *contents, | |
7386 | Elf_Internal_Rela *internal_relocs, | |
7387 | xtensa_opcode *reloc_opcodes, | |
7388 | reloc_range_list *list) | |
7389 | { | |
7390 | unsigned i; | |
7391 | size_t n = 0; | |
7392 | size_t max_n = 0; | |
7393 | reloc_range *ranges = NULL; | |
7394 | reloc_range_list_entry *reloc = | |
7395 | bfd_malloc (sec->reloc_count * sizeof (*reloc)); | |
7396 | ||
7397 | memset (list, 0, sizeof (*list)); | |
7398 | list->ok = TRUE; | |
7399 | ||
7400 | for (i = 0; i < sec->reloc_count; i++) | |
7401 | { | |
7402 | Elf_Internal_Rela *irel = &internal_relocs[i]; | |
7403 | int r_type = ELF32_R_TYPE (irel->r_info); | |
7404 | reloc_howto_type *howto = &elf_howto_table[r_type]; | |
7405 | r_reloc r_rel; | |
7406 | ||
7407 | if (r_type == R_XTENSA_ASM_SIMPLIFY | |
7408 | || r_type == R_XTENSA_32_PCREL | |
7409 | || !howto->pc_relative) | |
7410 | continue; | |
7411 | ||
7412 | r_reloc_init (&r_rel, abfd, irel, contents, | |
7413 | bfd_get_section_limit (abfd, sec)); | |
7414 | ||
7415 | if (r_reloc_get_section (&r_rel) != sec) | |
7416 | continue; | |
7417 | ||
7418 | if (n + 2 > max_n) | |
7419 | { | |
7420 | max_n = (max_n + 2) * 2; | |
7421 | ranges = bfd_realloc (ranges, max_n * sizeof (*ranges)); | |
7422 | } | |
7423 | ||
7424 | ranges[n].addr = irel->r_offset; | |
7425 | ranges[n + 1].addr = r_rel.target_offset; | |
7426 | ||
7427 | ranges[n].add = ranges[n].addr < ranges[n + 1].addr; | |
7428 | ranges[n + 1].add = !ranges[n].add; | |
7429 | ||
7430 | ranges[n].irel_index = i; | |
7431 | ranges[n + 1].irel_index = i; | |
7432 | ||
7433 | n += 2; | |
7434 | ||
7435 | reloc[i].irel = irel; | |
7436 | ||
7437 | /* Every relocation won't possibly be checked in the optimized version of | |
07d6d2b8 | 7438 | check_section_ebb_pcrels_fit, so this needs to be done here. */ |
b2b326d2 MF |
7439 | if (is_alt_relocation (ELF32_R_TYPE (irel->r_info))) |
7440 | { | |
7441 | /* None of the current alternate relocs are PC-relative, | |
7442 | and only PC-relative relocs matter here. */ | |
7443 | } | |
7444 | else | |
7445 | { | |
7446 | xtensa_opcode opcode; | |
7447 | int opnum; | |
7448 | ||
7449 | if (reloc_opcodes) | |
7450 | opcode = reloc_opcodes[i]; | |
7451 | else | |
7452 | opcode = get_relocation_opcode (abfd, sec, contents, irel); | |
7453 | ||
7454 | if (opcode == XTENSA_UNDEFINED) | |
7455 | { | |
7456 | list->ok = FALSE; | |
7457 | break; | |
7458 | } | |
7459 | ||
7460 | opnum = get_relocation_opnd (opcode, ELF32_R_TYPE (irel->r_info)); | |
7461 | if (opnum == XTENSA_UNDEFINED) | |
7462 | { | |
7463 | list->ok = FALSE; | |
7464 | break; | |
7465 | } | |
7466 | ||
7467 | /* Record relocation opcode and opnum as we've calculated them | |
7468 | anyway and they won't change. */ | |
7469 | reloc[i].opcode = opcode; | |
7470 | reloc[i].opnum = opnum; | |
7471 | } | |
7472 | } | |
7473 | ||
7474 | if (list->ok) | |
7475 | { | |
7476 | ranges = bfd_realloc (ranges, n * sizeof (*ranges)); | |
7477 | qsort (ranges, n, sizeof (*ranges), reloc_range_compare); | |
7478 | ||
7479 | list->n_range = n; | |
7480 | list->range = ranges; | |
7481 | list->reloc = reloc; | |
7482 | list->list_root.prev = &list->list_root; | |
7483 | list->list_root.next = &list->list_root; | |
7484 | } | |
7485 | else | |
7486 | { | |
7487 | free (ranges); | |
7488 | free (reloc); | |
7489 | } | |
7490 | } | |
7491 | ||
7492 | static void reloc_range_list_append (reloc_range_list *list, | |
7493 | unsigned irel_index) | |
7494 | { | |
7495 | reloc_range_list_entry *entry = list->reloc + irel_index; | |
7496 | ||
7497 | entry->prev = list->list_root.prev; | |
7498 | entry->next = &list->list_root; | |
7499 | entry->prev->next = entry; | |
7500 | entry->next->prev = entry; | |
7501 | ++list->n_list; | |
7502 | } | |
7503 | ||
7504 | static void reloc_range_list_remove (reloc_range_list *list, | |
7505 | unsigned irel_index) | |
7506 | { | |
7507 | reloc_range_list_entry *entry = list->reloc + irel_index; | |
7508 | ||
7509 | entry->next->prev = entry->prev; | |
7510 | entry->prev->next = entry->next; | |
7511 | --list->n_list; | |
7512 | } | |
7513 | ||
7514 | /* Update relocation list object so that it lists all relocations that cross | |
7515 | [first; last] range. Range bounds should not decrease with successive | |
7516 | invocations. */ | |
7517 | static void reloc_range_list_update_range (reloc_range_list *list, | |
7518 | bfd_vma first, bfd_vma last) | |
7519 | { | |
7520 | /* This should not happen: EBBs are iterated from lower addresses to higher. | |
7521 | But even if that happens there's no need to break: just flush current list | |
7522 | and start from scratch. */ | |
7523 | if ((list->last > 0 && list->range[list->last - 1].addr > last) || | |
7524 | (list->first > 0 && list->range[list->first - 1].addr >= first)) | |
7525 | { | |
7526 | list->first = 0; | |
7527 | list->last = 0; | |
7528 | list->n_list = 0; | |
7529 | list->list_root.next = &list->list_root; | |
7530 | list->list_root.prev = &list->list_root; | |
7531 | fprintf (stderr, "%s: move backwards requested\n", __func__); | |
7532 | } | |
7533 | ||
7534 | for (; list->last < list->n_range && | |
7535 | list->range[list->last].addr <= last; ++list->last) | |
7536 | if (list->range[list->last].add) | |
7537 | reloc_range_list_append (list, list->range[list->last].irel_index); | |
7538 | ||
7539 | for (; list->first < list->n_range && | |
7540 | list->range[list->first].addr < first; ++list->first) | |
7541 | if (!list->range[list->first].add) | |
7542 | reloc_range_list_remove (list, list->range[list->first].irel_index); | |
7543 | } | |
7544 | ||
7545 | static void free_reloc_range_list (reloc_range_list *list) | |
7546 | { | |
7547 | free (list->range); | |
7548 | free (list->reloc); | |
7549 | } | |
cb337148 | 7550 | |
43cd72b9 BW |
7551 | /* The compute_text_actions function will build a list of potential |
7552 | transformation actions for code in the extended basic block of each | |
7553 | longcall that is optimized to a direct call. From this list we | |
7554 | generate a set of actions to actually perform that optimizes for | |
7555 | space and, if not using size_opt, maintains branch target | |
7556 | alignments. | |
e0001a05 | 7557 | |
43cd72b9 BW |
7558 | These actions to be performed are placed on a per-section list. |
7559 | The actual changes are performed by relax_section() in the second | |
7560 | pass. */ | |
7561 | ||
7562 | bfd_boolean | |
7fa3d080 BW |
7563 | compute_text_actions (bfd *abfd, |
7564 | asection *sec, | |
7565 | struct bfd_link_info *link_info) | |
e0001a05 | 7566 | { |
cb337148 | 7567 | xtensa_opcode *reloc_opcodes = NULL; |
43cd72b9 | 7568 | xtensa_relax_info *relax_info; |
e0001a05 | 7569 | bfd_byte *contents; |
43cd72b9 | 7570 | Elf_Internal_Rela *internal_relocs; |
e0001a05 NC |
7571 | bfd_boolean ok = TRUE; |
7572 | unsigned i; | |
43cd72b9 BW |
7573 | property_table_entry *prop_table = 0; |
7574 | int ptblsize = 0; | |
7575 | bfd_size_type sec_size; | |
b2b326d2 | 7576 | reloc_range_list relevant_relocs; |
43cd72b9 | 7577 | |
43cd72b9 BW |
7578 | relax_info = get_xtensa_relax_info (sec); |
7579 | BFD_ASSERT (relax_info); | |
25c6282a BW |
7580 | BFD_ASSERT (relax_info->src_next == relax_info->src_count); |
7581 | ||
7582 | /* Do nothing if the section contains no optimized longcalls. */ | |
43cd72b9 BW |
7583 | if (!relax_info->is_relaxable_asm_section) |
7584 | return ok; | |
e0001a05 NC |
7585 | |
7586 | internal_relocs = retrieve_internal_relocs (abfd, sec, | |
7587 | link_info->keep_memory); | |
e0001a05 | 7588 | |
43cd72b9 BW |
7589 | if (internal_relocs) |
7590 | qsort (internal_relocs, sec->reloc_count, sizeof (Elf_Internal_Rela), | |
7591 | internal_reloc_compare); | |
7592 | ||
7593 | sec_size = bfd_get_section_limit (abfd, sec); | |
e0001a05 | 7594 | contents = retrieve_contents (abfd, sec, link_info->keep_memory); |
43cd72b9 | 7595 | if (contents == NULL && sec_size != 0) |
e0001a05 NC |
7596 | { |
7597 | ok = FALSE; | |
7598 | goto error_return; | |
7599 | } | |
7600 | ||
43cd72b9 BW |
7601 | ptblsize = xtensa_read_table_entries (abfd, sec, &prop_table, |
7602 | XTENSA_PROP_SEC_NAME, FALSE); | |
7603 | if (ptblsize < 0) | |
7604 | { | |
7605 | ok = FALSE; | |
7606 | goto error_return; | |
7607 | } | |
7608 | ||
b2b326d2 MF |
7609 | /* Precompute the opcode for each relocation. */ |
7610 | reloc_opcodes = build_reloc_opcodes (abfd, sec, contents, internal_relocs); | |
7611 | ||
7612 | build_reloc_ranges (abfd, sec, contents, internal_relocs, reloc_opcodes, | |
7613 | &relevant_relocs); | |
7614 | ||
43cd72b9 | 7615 | for (i = 0; i < sec->reloc_count; i++) |
e0001a05 NC |
7616 | { |
7617 | Elf_Internal_Rela *irel = &internal_relocs[i]; | |
43cd72b9 BW |
7618 | bfd_vma r_offset; |
7619 | property_table_entry *the_entry; | |
7620 | int ptbl_idx; | |
7621 | ebb_t *ebb; | |
7622 | ebb_constraint ebb_table; | |
7623 | bfd_size_type simplify_size; | |
7624 | ||
7625 | if (irel && ELF32_R_TYPE (irel->r_info) != R_XTENSA_ASM_SIMPLIFY) | |
7626 | continue; | |
7627 | r_offset = irel->r_offset; | |
e0001a05 | 7628 | |
43cd72b9 BW |
7629 | simplify_size = get_asm_simplify_size (contents, sec_size, r_offset); |
7630 | if (simplify_size == 0) | |
7631 | { | |
4eca0228 | 7632 | _bfd_error_handler |
695344c0 | 7633 | /* xgettext:c-format */ |
2dcf00ce | 7634 | (_("%pB(%pA+%#" PRIx64 "): could not decode instruction for " |
d42c267e AM |
7635 | "XTENSA_ASM_SIMPLIFY relocation; " |
7636 | "possible configuration mismatch"), | |
2dcf00ce | 7637 | sec->owner, sec, (uint64_t) r_offset); |
43cd72b9 BW |
7638 | continue; |
7639 | } | |
e0001a05 | 7640 | |
43cd72b9 BW |
7641 | /* If the instruction table is not around, then don't do this |
7642 | relaxation. */ | |
7643 | the_entry = elf_xtensa_find_property_entry (prop_table, ptblsize, | |
7644 | sec->vma + irel->r_offset); | |
7645 | if (the_entry == NULL || XTENSA_NO_NOP_REMOVAL) | |
7646 | { | |
7647 | text_action_add (&relax_info->action_list, | |
7648 | ta_convert_longcall, sec, r_offset, | |
7649 | 0); | |
7650 | continue; | |
7651 | } | |
7652 | ||
7653 | /* If the next longcall happens to be at the same address as an | |
7654 | unreachable section of size 0, then skip forward. */ | |
7655 | ptbl_idx = the_entry - prop_table; | |
7656 | while ((the_entry->flags & XTENSA_PROP_UNREACHABLE) | |
7657 | && the_entry->size == 0 | |
7658 | && ptbl_idx + 1 < ptblsize | |
7659 | && (prop_table[ptbl_idx + 1].address | |
7660 | == prop_table[ptbl_idx].address)) | |
7661 | { | |
7662 | ptbl_idx++; | |
7663 | the_entry++; | |
7664 | } | |
e0001a05 | 7665 | |
99ded152 | 7666 | if (the_entry->flags & XTENSA_PROP_NO_TRANSFORM) |
43cd72b9 BW |
7667 | /* NO_REORDER is OK */ |
7668 | continue; | |
e0001a05 | 7669 | |
43cd72b9 BW |
7670 | init_ebb_constraint (&ebb_table); |
7671 | ebb = &ebb_table.ebb; | |
7672 | init_ebb (ebb, sec, contents, sec_size, prop_table, ptblsize, | |
7673 | internal_relocs, sec->reloc_count); | |
7674 | ebb->start_offset = r_offset + simplify_size; | |
7675 | ebb->end_offset = r_offset + simplify_size; | |
7676 | ebb->start_ptbl_idx = ptbl_idx; | |
7677 | ebb->end_ptbl_idx = ptbl_idx; | |
7678 | ebb->start_reloc_idx = i; | |
7679 | ebb->end_reloc_idx = i; | |
7680 | ||
7681 | if (!extend_ebb_bounds (ebb) | |
7682 | || !compute_ebb_proposed_actions (&ebb_table) | |
7683 | || !compute_ebb_actions (&ebb_table) | |
7684 | || !check_section_ebb_pcrels_fit (abfd, sec, contents, | |
b2b326d2 MF |
7685 | internal_relocs, |
7686 | &relevant_relocs, | |
7687 | &ebb_table, reloc_opcodes) | |
43cd72b9 | 7688 | || !check_section_ebb_reduces (&ebb_table)) |
e0001a05 | 7689 | { |
43cd72b9 BW |
7690 | /* If anything goes wrong or we get unlucky and something does |
7691 | not fit, with our plan because of expansion between | |
7692 | critical branches, just convert to a NOP. */ | |
7693 | ||
7694 | text_action_add (&relax_info->action_list, | |
7695 | ta_convert_longcall, sec, r_offset, 0); | |
7696 | i = ebb_table.ebb.end_reloc_idx; | |
7697 | free_ebb_constraint (&ebb_table); | |
7698 | continue; | |
e0001a05 | 7699 | } |
43cd72b9 BW |
7700 | |
7701 | text_action_add_proposed (&relax_info->action_list, &ebb_table, sec); | |
7702 | ||
7703 | /* Update the index so we do not go looking at the relocations | |
7704 | we have already processed. */ | |
7705 | i = ebb_table.ebb.end_reloc_idx; | |
7706 | free_ebb_constraint (&ebb_table); | |
e0001a05 NC |
7707 | } |
7708 | ||
b2b326d2 MF |
7709 | free_reloc_range_list (&relevant_relocs); |
7710 | ||
43cd72b9 | 7711 | #if DEBUG |
4c2af04f | 7712 | if (action_list_count (&relax_info->action_list)) |
43cd72b9 BW |
7713 | print_action_list (stderr, &relax_info->action_list); |
7714 | #endif | |
7715 | ||
7716 | error_return: | |
e0001a05 NC |
7717 | release_contents (sec, contents); |
7718 | release_internal_relocs (sec, internal_relocs); | |
43cd72b9 BW |
7719 | if (prop_table) |
7720 | free (prop_table); | |
cb337148 BW |
7721 | if (reloc_opcodes) |
7722 | free (reloc_opcodes); | |
43cd72b9 | 7723 | |
e0001a05 NC |
7724 | return ok; |
7725 | } | |
7726 | ||
7727 | ||
64b607e6 BW |
7728 | /* Do not widen an instruction if it is preceeded by a |
7729 | loop opcode. It might cause misalignment. */ | |
7730 | ||
7731 | static bfd_boolean | |
7732 | prev_instr_is_a_loop (bfd_byte *contents, | |
7733 | bfd_size_type content_length, | |
7734 | bfd_size_type offset) | |
7735 | { | |
7736 | xtensa_opcode prev_opcode; | |
7737 | ||
7738 | if (offset < 3) | |
7739 | return FALSE; | |
7740 | prev_opcode = insn_decode_opcode (contents, content_length, offset-3, 0); | |
7741 | return (xtensa_opcode_is_loop (xtensa_default_isa, prev_opcode) == 1); | |
68ffbac6 | 7742 | } |
64b607e6 BW |
7743 | |
7744 | ||
43cd72b9 | 7745 | /* Find all of the possible actions for an extended basic block. */ |
e0001a05 | 7746 | |
43cd72b9 | 7747 | bfd_boolean |
7fa3d080 | 7748 | compute_ebb_proposed_actions (ebb_constraint *ebb_table) |
e0001a05 | 7749 | { |
43cd72b9 BW |
7750 | const ebb_t *ebb = &ebb_table->ebb; |
7751 | unsigned rel_idx = ebb->start_reloc_idx; | |
7752 | property_table_entry *entry, *start_entry, *end_entry; | |
64b607e6 BW |
7753 | bfd_vma offset = 0; |
7754 | xtensa_isa isa = xtensa_default_isa; | |
7755 | xtensa_format fmt; | |
7756 | static xtensa_insnbuf insnbuf = NULL; | |
7757 | static xtensa_insnbuf slotbuf = NULL; | |
7758 | ||
7759 | if (insnbuf == NULL) | |
7760 | { | |
7761 | insnbuf = xtensa_insnbuf_alloc (isa); | |
7762 | slotbuf = xtensa_insnbuf_alloc (isa); | |
7763 | } | |
e0001a05 | 7764 | |
43cd72b9 BW |
7765 | start_entry = &ebb->ptbl[ebb->start_ptbl_idx]; |
7766 | end_entry = &ebb->ptbl[ebb->end_ptbl_idx]; | |
e0001a05 | 7767 | |
43cd72b9 | 7768 | for (entry = start_entry; entry <= end_entry; entry++) |
e0001a05 | 7769 | { |
64b607e6 | 7770 | bfd_vma start_offset, end_offset; |
43cd72b9 | 7771 | bfd_size_type insn_len; |
e0001a05 | 7772 | |
43cd72b9 BW |
7773 | start_offset = entry->address - ebb->sec->vma; |
7774 | end_offset = entry->address + entry->size - ebb->sec->vma; | |
e0001a05 | 7775 | |
43cd72b9 BW |
7776 | if (entry == start_entry) |
7777 | start_offset = ebb->start_offset; | |
7778 | if (entry == end_entry) | |
7779 | end_offset = ebb->end_offset; | |
7780 | offset = start_offset; | |
e0001a05 | 7781 | |
43cd72b9 BW |
7782 | if (offset == entry->address - ebb->sec->vma |
7783 | && (entry->flags & XTENSA_PROP_INSN_BRANCH_TARGET) != 0) | |
7784 | { | |
7785 | enum ebb_target_enum align_type = EBB_DESIRE_TGT_ALIGN; | |
7786 | BFD_ASSERT (offset != end_offset); | |
7787 | if (offset == end_offset) | |
7788 | return FALSE; | |
e0001a05 | 7789 | |
43cd72b9 BW |
7790 | insn_len = insn_decode_len (ebb->contents, ebb->content_length, |
7791 | offset); | |
68ffbac6 | 7792 | if (insn_len == 0) |
64b607e6 BW |
7793 | goto decode_error; |
7794 | ||
43cd72b9 BW |
7795 | if (check_branch_target_aligned_address (offset, insn_len)) |
7796 | align_type = EBB_REQUIRE_TGT_ALIGN; | |
7797 | ||
7798 | ebb_propose_action (ebb_table, align_type, 0, | |
7799 | ta_none, offset, 0, TRUE); | |
7800 | } | |
7801 | ||
7802 | while (offset != end_offset) | |
e0001a05 | 7803 | { |
43cd72b9 | 7804 | Elf_Internal_Rela *irel; |
e0001a05 | 7805 | xtensa_opcode opcode; |
e0001a05 | 7806 | |
43cd72b9 BW |
7807 | while (rel_idx < ebb->end_reloc_idx |
7808 | && (ebb->relocs[rel_idx].r_offset < offset | |
7809 | || (ebb->relocs[rel_idx].r_offset == offset | |
7810 | && (ELF32_R_TYPE (ebb->relocs[rel_idx].r_info) | |
7811 | != R_XTENSA_ASM_SIMPLIFY)))) | |
7812 | rel_idx++; | |
7813 | ||
7814 | /* Check for longcall. */ | |
7815 | irel = &ebb->relocs[rel_idx]; | |
7816 | if (irel->r_offset == offset | |
7817 | && ELF32_R_TYPE (irel->r_info) == R_XTENSA_ASM_SIMPLIFY) | |
7818 | { | |
7819 | bfd_size_type simplify_size; | |
e0001a05 | 7820 | |
68ffbac6 | 7821 | simplify_size = get_asm_simplify_size (ebb->contents, |
43cd72b9 BW |
7822 | ebb->content_length, |
7823 | irel->r_offset); | |
7824 | if (simplify_size == 0) | |
64b607e6 | 7825 | goto decode_error; |
43cd72b9 BW |
7826 | |
7827 | ebb_propose_action (ebb_table, EBB_NO_ALIGN, 0, | |
7828 | ta_convert_longcall, offset, 0, TRUE); | |
68ffbac6 | 7829 | |
43cd72b9 BW |
7830 | offset += simplify_size; |
7831 | continue; | |
7832 | } | |
e0001a05 | 7833 | |
64b607e6 BW |
7834 | if (offset + MIN_INSN_LENGTH > ebb->content_length) |
7835 | goto decode_error; | |
7836 | xtensa_insnbuf_from_chars (isa, insnbuf, &ebb->contents[offset], | |
7837 | ebb->content_length - offset); | |
7838 | fmt = xtensa_format_decode (isa, insnbuf); | |
7839 | if (fmt == XTENSA_UNDEFINED) | |
7840 | goto decode_error; | |
7841 | insn_len = xtensa_format_length (isa, fmt); | |
7842 | if (insn_len == (bfd_size_type) XTENSA_UNDEFINED) | |
7843 | goto decode_error; | |
7844 | ||
7845 | if (xtensa_format_num_slots (isa, fmt) != 1) | |
43cd72b9 | 7846 | { |
64b607e6 BW |
7847 | offset += insn_len; |
7848 | continue; | |
43cd72b9 | 7849 | } |
64b607e6 BW |
7850 | |
7851 | xtensa_format_get_slot (isa, fmt, 0, insnbuf, slotbuf); | |
7852 | opcode = xtensa_opcode_decode (isa, fmt, 0, slotbuf); | |
7853 | if (opcode == XTENSA_UNDEFINED) | |
7854 | goto decode_error; | |
7855 | ||
43cd72b9 | 7856 | if ((entry->flags & XTENSA_PROP_INSN_NO_DENSITY) == 0 |
99ded152 | 7857 | && (entry->flags & XTENSA_PROP_NO_TRANSFORM) == 0 |
64b607e6 | 7858 | && can_narrow_instruction (slotbuf, fmt, opcode) != 0) |
43cd72b9 BW |
7859 | { |
7860 | /* Add an instruction narrow action. */ | |
7861 | ebb_propose_action (ebb_table, EBB_NO_ALIGN, 0, | |
7862 | ta_narrow_insn, offset, 0, FALSE); | |
43cd72b9 | 7863 | } |
99ded152 | 7864 | else if ((entry->flags & XTENSA_PROP_NO_TRANSFORM) == 0 |
64b607e6 BW |
7865 | && can_widen_instruction (slotbuf, fmt, opcode) != 0 |
7866 | && ! prev_instr_is_a_loop (ebb->contents, | |
7867 | ebb->content_length, offset)) | |
43cd72b9 BW |
7868 | { |
7869 | /* Add an instruction widen action. */ | |
7870 | ebb_propose_action (ebb_table, EBB_NO_ALIGN, 0, | |
7871 | ta_widen_insn, offset, 0, FALSE); | |
43cd72b9 | 7872 | } |
64b607e6 | 7873 | else if (xtensa_opcode_is_loop (xtensa_default_isa, opcode) == 1) |
43cd72b9 BW |
7874 | { |
7875 | /* Check for branch targets. */ | |
7876 | ebb_propose_action (ebb_table, EBB_REQUIRE_LOOP_ALIGN, 0, | |
7877 | ta_none, offset, 0, TRUE); | |
43cd72b9 BW |
7878 | } |
7879 | ||
7880 | offset += insn_len; | |
e0001a05 NC |
7881 | } |
7882 | } | |
7883 | ||
43cd72b9 BW |
7884 | if (ebb->ends_unreachable) |
7885 | { | |
7886 | ebb_propose_action (ebb_table, EBB_NO_ALIGN, 0, | |
7887 | ta_fill, ebb->end_offset, 0, TRUE); | |
7888 | } | |
e0001a05 | 7889 | |
43cd72b9 | 7890 | return TRUE; |
64b607e6 BW |
7891 | |
7892 | decode_error: | |
4eca0228 | 7893 | _bfd_error_handler |
695344c0 | 7894 | /* xgettext:c-format */ |
2dcf00ce | 7895 | (_("%pB(%pA+%#" PRIx64 "): could not decode instruction; " |
d42c267e | 7896 | "possible configuration mismatch"), |
2dcf00ce | 7897 | ebb->sec->owner, ebb->sec, (uint64_t) offset); |
64b607e6 | 7898 | return FALSE; |
43cd72b9 BW |
7899 | } |
7900 | ||
7901 | ||
7902 | /* After all of the information has collected about the | |
7903 | transformations possible in an EBB, compute the appropriate actions | |
7904 | here in compute_ebb_actions. We still must check later to make | |
7905 | sure that the actions do not break any relocations. The algorithm | |
7906 | used here is pretty greedy. Basically, it removes as many no-ops | |
7907 | as possible so that the end of the EBB has the same alignment | |
7908 | characteristics as the original. First, it uses narrowing, then | |
7909 | fill space at the end of the EBB, and finally widenings. If that | |
7910 | does not work, it tries again with one fewer no-op removed. The | |
7911 | optimization will only be performed if all of the branch targets | |
7912 | that were aligned before transformation are also aligned after the | |
7913 | transformation. | |
7914 | ||
7915 | When the size_opt flag is set, ignore the branch target alignments, | |
7916 | narrow all wide instructions, and remove all no-ops unless the end | |
7917 | of the EBB prevents it. */ | |
7918 | ||
7919 | bfd_boolean | |
7fa3d080 | 7920 | compute_ebb_actions (ebb_constraint *ebb_table) |
43cd72b9 BW |
7921 | { |
7922 | unsigned i = 0; | |
7923 | unsigned j; | |
7924 | int removed_bytes = 0; | |
7925 | ebb_t *ebb = &ebb_table->ebb; | |
7926 | unsigned seg_idx_start = 0; | |
7927 | unsigned seg_idx_end = 0; | |
7928 | ||
7929 | /* We perform this like the assembler relaxation algorithm: Start by | |
7930 | assuming all instructions are narrow and all no-ops removed; then | |
7931 | walk through.... */ | |
7932 | ||
7933 | /* For each segment of this that has a solid constraint, check to | |
7934 | see if there are any combinations that will keep the constraint. | |
7935 | If so, use it. */ | |
7936 | for (seg_idx_end = 0; seg_idx_end < ebb_table->action_count; seg_idx_end++) | |
e0001a05 | 7937 | { |
43cd72b9 BW |
7938 | bfd_boolean requires_text_end_align = FALSE; |
7939 | unsigned longcall_count = 0; | |
7940 | unsigned longcall_convert_count = 0; | |
7941 | unsigned narrowable_count = 0; | |
7942 | unsigned narrowable_convert_count = 0; | |
7943 | unsigned widenable_count = 0; | |
7944 | unsigned widenable_convert_count = 0; | |
e0001a05 | 7945 | |
43cd72b9 BW |
7946 | proposed_action *action = NULL; |
7947 | int align = (1 << ebb_table->ebb.sec->alignment_power); | |
e0001a05 | 7948 | |
43cd72b9 | 7949 | seg_idx_start = seg_idx_end; |
e0001a05 | 7950 | |
43cd72b9 BW |
7951 | for (i = seg_idx_start; i < ebb_table->action_count; i++) |
7952 | { | |
7953 | action = &ebb_table->actions[i]; | |
7954 | if (action->action == ta_convert_longcall) | |
7955 | longcall_count++; | |
7956 | if (action->action == ta_narrow_insn) | |
7957 | narrowable_count++; | |
7958 | if (action->action == ta_widen_insn) | |
7959 | widenable_count++; | |
7960 | if (action->action == ta_fill) | |
7961 | break; | |
7962 | if (action->align_type == EBB_REQUIRE_LOOP_ALIGN) | |
7963 | break; | |
7964 | if (action->align_type == EBB_REQUIRE_TGT_ALIGN | |
7965 | && !elf32xtensa_size_opt) | |
7966 | break; | |
7967 | } | |
7968 | seg_idx_end = i; | |
e0001a05 | 7969 | |
43cd72b9 BW |
7970 | if (seg_idx_end == ebb_table->action_count && !ebb->ends_unreachable) |
7971 | requires_text_end_align = TRUE; | |
e0001a05 | 7972 | |
43cd72b9 BW |
7973 | if (elf32xtensa_size_opt && !requires_text_end_align |
7974 | && action->align_type != EBB_REQUIRE_LOOP_ALIGN | |
7975 | && action->align_type != EBB_REQUIRE_TGT_ALIGN) | |
7976 | { | |
7977 | longcall_convert_count = longcall_count; | |
7978 | narrowable_convert_count = narrowable_count; | |
7979 | widenable_convert_count = 0; | |
7980 | } | |
7981 | else | |
7982 | { | |
7983 | /* There is a constraint. Convert the max number of longcalls. */ | |
7984 | narrowable_convert_count = 0; | |
7985 | longcall_convert_count = 0; | |
7986 | widenable_convert_count = 0; | |
e0001a05 | 7987 | |
43cd72b9 | 7988 | for (j = 0; j < longcall_count; j++) |
e0001a05 | 7989 | { |
43cd72b9 BW |
7990 | int removed = (longcall_count - j) * 3 & (align - 1); |
7991 | unsigned desire_narrow = (align - removed) & (align - 1); | |
7992 | unsigned desire_widen = removed; | |
7993 | if (desire_narrow <= narrowable_count) | |
7994 | { | |
7995 | narrowable_convert_count = desire_narrow; | |
7996 | narrowable_convert_count += | |
7997 | (align * ((narrowable_count - narrowable_convert_count) | |
7998 | / align)); | |
7999 | longcall_convert_count = (longcall_count - j); | |
8000 | widenable_convert_count = 0; | |
8001 | break; | |
8002 | } | |
8003 | if (desire_widen <= widenable_count && !elf32xtensa_size_opt) | |
8004 | { | |
8005 | narrowable_convert_count = 0; | |
8006 | longcall_convert_count = longcall_count - j; | |
8007 | widenable_convert_count = desire_widen; | |
8008 | break; | |
8009 | } | |
8010 | } | |
8011 | } | |
e0001a05 | 8012 | |
43cd72b9 BW |
8013 | /* Now the number of conversions are saved. Do them. */ |
8014 | for (i = seg_idx_start; i < seg_idx_end; i++) | |
8015 | { | |
8016 | action = &ebb_table->actions[i]; | |
8017 | switch (action->action) | |
8018 | { | |
8019 | case ta_convert_longcall: | |
8020 | if (longcall_convert_count != 0) | |
8021 | { | |
8022 | action->action = ta_remove_longcall; | |
8023 | action->do_action = TRUE; | |
8024 | action->removed_bytes += 3; | |
8025 | longcall_convert_count--; | |
8026 | } | |
8027 | break; | |
8028 | case ta_narrow_insn: | |
8029 | if (narrowable_convert_count != 0) | |
8030 | { | |
8031 | action->do_action = TRUE; | |
8032 | action->removed_bytes += 1; | |
8033 | narrowable_convert_count--; | |
8034 | } | |
8035 | break; | |
8036 | case ta_widen_insn: | |
8037 | if (widenable_convert_count != 0) | |
8038 | { | |
8039 | action->do_action = TRUE; | |
8040 | action->removed_bytes -= 1; | |
8041 | widenable_convert_count--; | |
8042 | } | |
8043 | break; | |
8044 | default: | |
8045 | break; | |
e0001a05 | 8046 | } |
43cd72b9 BW |
8047 | } |
8048 | } | |
e0001a05 | 8049 | |
43cd72b9 BW |
8050 | /* Now we move on to some local opts. Try to remove each of the |
8051 | remaining longcalls. */ | |
e0001a05 | 8052 | |
43cd72b9 BW |
8053 | if (ebb_table->ebb.ends_section || ebb_table->ebb.ends_unreachable) |
8054 | { | |
8055 | removed_bytes = 0; | |
8056 | for (i = 0; i < ebb_table->action_count; i++) | |
e0001a05 | 8057 | { |
43cd72b9 BW |
8058 | int old_removed_bytes = removed_bytes; |
8059 | proposed_action *action = &ebb_table->actions[i]; | |
8060 | ||
8061 | if (action->do_action && action->action == ta_convert_longcall) | |
8062 | { | |
8063 | bfd_boolean bad_alignment = FALSE; | |
8064 | removed_bytes += 3; | |
8065 | for (j = i + 1; j < ebb_table->action_count; j++) | |
8066 | { | |
8067 | proposed_action *new_action = &ebb_table->actions[j]; | |
8068 | bfd_vma offset = new_action->offset; | |
8069 | if (new_action->align_type == EBB_REQUIRE_TGT_ALIGN) | |
8070 | { | |
8071 | if (!check_branch_target_aligned | |
8072 | (ebb_table->ebb.contents, | |
8073 | ebb_table->ebb.content_length, | |
8074 | offset, offset - removed_bytes)) | |
8075 | { | |
8076 | bad_alignment = TRUE; | |
8077 | break; | |
8078 | } | |
8079 | } | |
8080 | if (new_action->align_type == EBB_REQUIRE_LOOP_ALIGN) | |
8081 | { | |
8082 | if (!check_loop_aligned (ebb_table->ebb.contents, | |
8083 | ebb_table->ebb.content_length, | |
8084 | offset, | |
8085 | offset - removed_bytes)) | |
8086 | { | |
8087 | bad_alignment = TRUE; | |
8088 | break; | |
8089 | } | |
8090 | } | |
8091 | if (new_action->action == ta_narrow_insn | |
8092 | && !new_action->do_action | |
8093 | && ebb_table->ebb.sec->alignment_power == 2) | |
8094 | { | |
8095 | /* Narrow an instruction and we are done. */ | |
8096 | new_action->do_action = TRUE; | |
8097 | new_action->removed_bytes += 1; | |
8098 | bad_alignment = FALSE; | |
8099 | break; | |
8100 | } | |
8101 | if (new_action->action == ta_widen_insn | |
8102 | && new_action->do_action | |
8103 | && ebb_table->ebb.sec->alignment_power == 2) | |
8104 | { | |
8105 | /* Narrow an instruction and we are done. */ | |
8106 | new_action->do_action = FALSE; | |
8107 | new_action->removed_bytes += 1; | |
8108 | bad_alignment = FALSE; | |
8109 | break; | |
8110 | } | |
5c5d6806 BW |
8111 | if (new_action->do_action) |
8112 | removed_bytes += new_action->removed_bytes; | |
43cd72b9 BW |
8113 | } |
8114 | if (!bad_alignment) | |
8115 | { | |
8116 | action->removed_bytes += 3; | |
8117 | action->action = ta_remove_longcall; | |
8118 | action->do_action = TRUE; | |
8119 | } | |
8120 | } | |
8121 | removed_bytes = old_removed_bytes; | |
8122 | if (action->do_action) | |
8123 | removed_bytes += action->removed_bytes; | |
e0001a05 NC |
8124 | } |
8125 | } | |
8126 | ||
43cd72b9 BW |
8127 | removed_bytes = 0; |
8128 | for (i = 0; i < ebb_table->action_count; ++i) | |
8129 | { | |
8130 | proposed_action *action = &ebb_table->actions[i]; | |
8131 | if (action->do_action) | |
8132 | removed_bytes += action->removed_bytes; | |
8133 | } | |
8134 | ||
8135 | if ((removed_bytes % (1 << ebb_table->ebb.sec->alignment_power)) != 0 | |
8136 | && ebb->ends_unreachable) | |
8137 | { | |
8138 | proposed_action *action; | |
8139 | int br; | |
8140 | int extra_space; | |
8141 | ||
8142 | BFD_ASSERT (ebb_table->action_count != 0); | |
8143 | action = &ebb_table->actions[ebb_table->action_count - 1]; | |
8144 | BFD_ASSERT (action->action == ta_fill); | |
8145 | BFD_ASSERT (ebb->ends_unreachable->flags & XTENSA_PROP_UNREACHABLE); | |
8146 | ||
4b8e28c7 | 8147 | extra_space = xtensa_compute_fill_extra_space (ebb->ends_unreachable); |
43cd72b9 BW |
8148 | br = action->removed_bytes + removed_bytes + extra_space; |
8149 | br = br & ((1 << ebb->sec->alignment_power ) - 1); | |
8150 | ||
8151 | action->removed_bytes = extra_space - br; | |
8152 | } | |
8153 | return TRUE; | |
e0001a05 NC |
8154 | } |
8155 | ||
8156 | ||
03e94c08 BW |
8157 | /* The xlate_map is a sorted array of address mappings designed to |
8158 | answer the offset_with_removed_text() query with a binary search instead | |
8159 | of a linear search through the section's action_list. */ | |
8160 | ||
8161 | typedef struct xlate_map_entry xlate_map_entry_t; | |
8162 | typedef struct xlate_map xlate_map_t; | |
8163 | ||
8164 | struct xlate_map_entry | |
8165 | { | |
0854d504 MF |
8166 | bfd_vma orig_address; |
8167 | bfd_vma new_address; | |
03e94c08 BW |
8168 | unsigned size; |
8169 | }; | |
8170 | ||
8171 | struct xlate_map | |
8172 | { | |
8173 | unsigned entry_count; | |
8174 | xlate_map_entry_t *entry; | |
8175 | }; | |
8176 | ||
8177 | ||
68ffbac6 | 8178 | static int |
03e94c08 BW |
8179 | xlate_compare (const void *a_v, const void *b_v) |
8180 | { | |
8181 | const xlate_map_entry_t *a = (const xlate_map_entry_t *) a_v; | |
8182 | const xlate_map_entry_t *b = (const xlate_map_entry_t *) b_v; | |
8183 | if (a->orig_address < b->orig_address) | |
8184 | return -1; | |
8185 | if (a->orig_address > (b->orig_address + b->size - 1)) | |
8186 | return 1; | |
8187 | return 0; | |
8188 | } | |
8189 | ||
8190 | ||
8191 | static bfd_vma | |
8192 | xlate_offset_with_removed_text (const xlate_map_t *map, | |
8193 | text_action_list *action_list, | |
8194 | bfd_vma offset) | |
8195 | { | |
03e94c08 BW |
8196 | void *r; |
8197 | xlate_map_entry_t *e; | |
0854d504 | 8198 | struct xlate_map_entry se; |
03e94c08 BW |
8199 | |
8200 | if (map == NULL) | |
8201 | return offset_with_removed_text (action_list, offset); | |
8202 | ||
8203 | if (map->entry_count == 0) | |
8204 | return offset; | |
8205 | ||
0854d504 MF |
8206 | se.orig_address = offset; |
8207 | r = bsearch (&se, map->entry, map->entry_count, | |
03e94c08 BW |
8208 | sizeof (xlate_map_entry_t), &xlate_compare); |
8209 | e = (xlate_map_entry_t *) r; | |
68ffbac6 | 8210 | |
0854d504 MF |
8211 | /* There could be a jump past the end of the section, |
8212 | allow it using the last xlate map entry to translate its address. */ | |
8213 | if (e == NULL) | |
8214 | { | |
8215 | e = map->entry + map->entry_count - 1; | |
8216 | if (xlate_compare (&se, e) <= 0) | |
8217 | e = NULL; | |
8218 | } | |
03e94c08 BW |
8219 | BFD_ASSERT (e != NULL); |
8220 | if (e == NULL) | |
8221 | return offset; | |
8222 | return e->new_address - e->orig_address + offset; | |
8223 | } | |
8224 | ||
4c2af04f MF |
8225 | typedef struct xlate_map_context_struct xlate_map_context; |
8226 | struct xlate_map_context_struct | |
8227 | { | |
8228 | xlate_map_t *map; | |
8229 | xlate_map_entry_t *current_entry; | |
8230 | int removed; | |
8231 | }; | |
8232 | ||
8233 | static int | |
8234 | xlate_map_fn (splay_tree_node node, void *p) | |
8235 | { | |
8236 | text_action *r = (text_action *)node->value; | |
8237 | xlate_map_context *ctx = p; | |
8238 | unsigned orig_size = 0; | |
8239 | ||
8240 | switch (r->action) | |
8241 | { | |
8242 | case ta_none: | |
8243 | case ta_remove_insn: | |
8244 | case ta_convert_longcall: | |
8245 | case ta_remove_literal: | |
8246 | case ta_add_literal: | |
8247 | break; | |
8248 | case ta_remove_longcall: | |
8249 | orig_size = 6; | |
8250 | break; | |
8251 | case ta_narrow_insn: | |
8252 | orig_size = 3; | |
8253 | break; | |
8254 | case ta_widen_insn: | |
8255 | orig_size = 2; | |
8256 | break; | |
8257 | case ta_fill: | |
8258 | break; | |
8259 | } | |
8260 | ctx->current_entry->size = | |
8261 | r->offset + orig_size - ctx->current_entry->orig_address; | |
8262 | if (ctx->current_entry->size != 0) | |
8263 | { | |
8264 | ctx->current_entry++; | |
8265 | ctx->map->entry_count++; | |
8266 | } | |
8267 | ctx->current_entry->orig_address = r->offset + orig_size; | |
8268 | ctx->removed += r->removed_bytes; | |
8269 | ctx->current_entry->new_address = r->offset + orig_size - ctx->removed; | |
8270 | ctx->current_entry->size = 0; | |
8271 | return 0; | |
8272 | } | |
03e94c08 BW |
8273 | |
8274 | /* Build a binary searchable offset translation map from a section's | |
8275 | action list. */ | |
8276 | ||
8277 | static xlate_map_t * | |
8278 | build_xlate_map (asection *sec, xtensa_relax_info *relax_info) | |
8279 | { | |
03e94c08 BW |
8280 | text_action_list *action_list = &relax_info->action_list; |
8281 | unsigned num_actions = 0; | |
4c2af04f | 8282 | xlate_map_context ctx; |
03e94c08 | 8283 | |
4c2af04f MF |
8284 | ctx.map = (xlate_map_t *) bfd_malloc (sizeof (xlate_map_t)); |
8285 | ||
8286 | if (ctx.map == NULL) | |
03e94c08 BW |
8287 | return NULL; |
8288 | ||
8289 | num_actions = action_list_count (action_list); | |
4c2af04f | 8290 | ctx.map->entry = (xlate_map_entry_t *) |
03e94c08 | 8291 | bfd_malloc (sizeof (xlate_map_entry_t) * (num_actions + 1)); |
4c2af04f | 8292 | if (ctx.map->entry == NULL) |
03e94c08 | 8293 | { |
4c2af04f | 8294 | free (ctx.map); |
03e94c08 BW |
8295 | return NULL; |
8296 | } | |
4c2af04f | 8297 | ctx.map->entry_count = 0; |
68ffbac6 | 8298 | |
4c2af04f MF |
8299 | ctx.removed = 0; |
8300 | ctx.current_entry = &ctx.map->entry[0]; | |
03e94c08 | 8301 | |
4c2af04f MF |
8302 | ctx.current_entry->orig_address = 0; |
8303 | ctx.current_entry->new_address = 0; | |
8304 | ctx.current_entry->size = 0; | |
03e94c08 | 8305 | |
4c2af04f | 8306 | splay_tree_foreach (action_list->tree, xlate_map_fn, &ctx); |
03e94c08 | 8307 | |
4c2af04f MF |
8308 | ctx.current_entry->size = (bfd_get_section_limit (sec->owner, sec) |
8309 | - ctx.current_entry->orig_address); | |
8310 | if (ctx.current_entry->size != 0) | |
8311 | ctx.map->entry_count++; | |
03e94c08 | 8312 | |
4c2af04f | 8313 | return ctx.map; |
03e94c08 BW |
8314 | } |
8315 | ||
8316 | ||
8317 | /* Free an offset translation map. */ | |
8318 | ||
68ffbac6 | 8319 | static void |
03e94c08 BW |
8320 | free_xlate_map (xlate_map_t *map) |
8321 | { | |
8322 | if (map && map->entry) | |
8323 | free (map->entry); | |
8324 | if (map) | |
8325 | free (map); | |
8326 | } | |
8327 | ||
8328 | ||
43cd72b9 BW |
8329 | /* Use check_section_ebb_pcrels_fit to make sure that all of the |
8330 | relocations in a section will fit if a proposed set of actions | |
8331 | are performed. */ | |
e0001a05 | 8332 | |
43cd72b9 | 8333 | static bfd_boolean |
7fa3d080 BW |
8334 | check_section_ebb_pcrels_fit (bfd *abfd, |
8335 | asection *sec, | |
8336 | bfd_byte *contents, | |
8337 | Elf_Internal_Rela *internal_relocs, | |
b2b326d2 | 8338 | reloc_range_list *relevant_relocs, |
cb337148 BW |
8339 | const ebb_constraint *constraint, |
8340 | const xtensa_opcode *reloc_opcodes) | |
e0001a05 | 8341 | { |
43cd72b9 | 8342 | unsigned i, j; |
b2b326d2 | 8343 | unsigned n = sec->reloc_count; |
43cd72b9 | 8344 | Elf_Internal_Rela *irel; |
03e94c08 BW |
8345 | xlate_map_t *xmap = NULL; |
8346 | bfd_boolean ok = TRUE; | |
43cd72b9 | 8347 | xtensa_relax_info *relax_info; |
b2b326d2 | 8348 | reloc_range_list_entry *entry = NULL; |
e0001a05 | 8349 | |
43cd72b9 | 8350 | relax_info = get_xtensa_relax_info (sec); |
e0001a05 | 8351 | |
03e94c08 BW |
8352 | if (relax_info && sec->reloc_count > 100) |
8353 | { | |
8354 | xmap = build_xlate_map (sec, relax_info); | |
8355 | /* NULL indicates out of memory, but the slow version | |
8356 | can still be used. */ | |
8357 | } | |
8358 | ||
b2b326d2 MF |
8359 | if (relevant_relocs && constraint->action_count) |
8360 | { | |
8361 | if (!relevant_relocs->ok) | |
8362 | { | |
8363 | ok = FALSE; | |
8364 | n = 0; | |
8365 | } | |
8366 | else | |
8367 | { | |
8368 | bfd_vma min_offset, max_offset; | |
8369 | min_offset = max_offset = constraint->actions[0].offset; | |
8370 | ||
8371 | for (i = 1; i < constraint->action_count; ++i) | |
8372 | { | |
8373 | proposed_action *action = &constraint->actions[i]; | |
8374 | bfd_vma offset = action->offset; | |
8375 | ||
8376 | if (offset < min_offset) | |
8377 | min_offset = offset; | |
8378 | if (offset > max_offset) | |
8379 | max_offset = offset; | |
8380 | } | |
8381 | reloc_range_list_update_range (relevant_relocs, min_offset, | |
8382 | max_offset); | |
8383 | n = relevant_relocs->n_list; | |
8384 | entry = &relevant_relocs->list_root; | |
8385 | } | |
8386 | } | |
8387 | else | |
8388 | { | |
8389 | relevant_relocs = NULL; | |
8390 | } | |
8391 | ||
8392 | for (i = 0; i < n; i++) | |
43cd72b9 BW |
8393 | { |
8394 | r_reloc r_rel; | |
8395 | bfd_vma orig_self_offset, orig_target_offset; | |
8396 | bfd_vma self_offset, target_offset; | |
8397 | int r_type; | |
8398 | reloc_howto_type *howto; | |
8399 | int self_removed_bytes, target_removed_bytes; | |
e0001a05 | 8400 | |
b2b326d2 MF |
8401 | if (relevant_relocs) |
8402 | { | |
8403 | entry = entry->next; | |
8404 | irel = entry->irel; | |
8405 | } | |
8406 | else | |
8407 | { | |
8408 | irel = internal_relocs + i; | |
8409 | } | |
43cd72b9 | 8410 | r_type = ELF32_R_TYPE (irel->r_info); |
e0001a05 | 8411 | |
43cd72b9 BW |
8412 | howto = &elf_howto_table[r_type]; |
8413 | /* We maintain the required invariant: PC-relative relocations | |
8414 | that fit before linking must fit after linking. Thus we only | |
8415 | need to deal with relocations to the same section that are | |
8416 | PC-relative. */ | |
1bbb5f21 BW |
8417 | if (r_type == R_XTENSA_ASM_SIMPLIFY |
8418 | || r_type == R_XTENSA_32_PCREL | |
43cd72b9 BW |
8419 | || !howto->pc_relative) |
8420 | continue; | |
e0001a05 | 8421 | |
43cd72b9 BW |
8422 | r_reloc_init (&r_rel, abfd, irel, contents, |
8423 | bfd_get_section_limit (abfd, sec)); | |
e0001a05 | 8424 | |
43cd72b9 BW |
8425 | if (r_reloc_get_section (&r_rel) != sec) |
8426 | continue; | |
e0001a05 | 8427 | |
43cd72b9 BW |
8428 | orig_self_offset = irel->r_offset; |
8429 | orig_target_offset = r_rel.target_offset; | |
e0001a05 | 8430 | |
43cd72b9 BW |
8431 | self_offset = orig_self_offset; |
8432 | target_offset = orig_target_offset; | |
8433 | ||
8434 | if (relax_info) | |
8435 | { | |
03e94c08 BW |
8436 | self_offset = |
8437 | xlate_offset_with_removed_text (xmap, &relax_info->action_list, | |
8438 | orig_self_offset); | |
8439 | target_offset = | |
8440 | xlate_offset_with_removed_text (xmap, &relax_info->action_list, | |
8441 | orig_target_offset); | |
43cd72b9 BW |
8442 | } |
8443 | ||
8444 | self_removed_bytes = 0; | |
8445 | target_removed_bytes = 0; | |
8446 | ||
8447 | for (j = 0; j < constraint->action_count; ++j) | |
8448 | { | |
8449 | proposed_action *action = &constraint->actions[j]; | |
8450 | bfd_vma offset = action->offset; | |
8451 | int removed_bytes = action->removed_bytes; | |
8452 | if (offset < orig_self_offset | |
8453 | || (offset == orig_self_offset && action->action == ta_fill | |
8454 | && action->removed_bytes < 0)) | |
8455 | self_removed_bytes += removed_bytes; | |
8456 | if (offset < orig_target_offset | |
8457 | || (offset == orig_target_offset && action->action == ta_fill | |
8458 | && action->removed_bytes < 0)) | |
8459 | target_removed_bytes += removed_bytes; | |
8460 | } | |
8461 | self_offset -= self_removed_bytes; | |
8462 | target_offset -= target_removed_bytes; | |
8463 | ||
8464 | /* Try to encode it. Get the operand and check. */ | |
8465 | if (is_alt_relocation (ELF32_R_TYPE (irel->r_info))) | |
8466 | { | |
8467 | /* None of the current alternate relocs are PC-relative, | |
8468 | and only PC-relative relocs matter here. */ | |
8469 | } | |
8470 | else | |
8471 | { | |
8472 | xtensa_opcode opcode; | |
8473 | int opnum; | |
8474 | ||
b2b326d2 | 8475 | if (relevant_relocs) |
03e94c08 | 8476 | { |
b2b326d2 MF |
8477 | opcode = entry->opcode; |
8478 | opnum = entry->opnum; | |
03e94c08 | 8479 | } |
b2b326d2 | 8480 | else |
03e94c08 | 8481 | { |
b2b326d2 MF |
8482 | if (reloc_opcodes) |
8483 | opcode = reloc_opcodes[relevant_relocs ? | |
8484 | (unsigned)(entry - relevant_relocs->reloc) : i]; | |
8485 | else | |
8486 | opcode = get_relocation_opcode (abfd, sec, contents, irel); | |
8487 | if (opcode == XTENSA_UNDEFINED) | |
8488 | { | |
8489 | ok = FALSE; | |
8490 | break; | |
8491 | } | |
8492 | ||
8493 | opnum = get_relocation_opnd (opcode, ELF32_R_TYPE (irel->r_info)); | |
8494 | if (opnum == XTENSA_UNDEFINED) | |
8495 | { | |
8496 | ok = FALSE; | |
8497 | break; | |
8498 | } | |
03e94c08 | 8499 | } |
43cd72b9 BW |
8500 | |
8501 | if (!pcrel_reloc_fits (opcode, opnum, self_offset, target_offset)) | |
03e94c08 BW |
8502 | { |
8503 | ok = FALSE; | |
8504 | break; | |
8505 | } | |
43cd72b9 BW |
8506 | } |
8507 | } | |
8508 | ||
03e94c08 BW |
8509 | if (xmap) |
8510 | free_xlate_map (xmap); | |
8511 | ||
8512 | return ok; | |
43cd72b9 BW |
8513 | } |
8514 | ||
8515 | ||
8516 | static bfd_boolean | |
7fa3d080 | 8517 | check_section_ebb_reduces (const ebb_constraint *constraint) |
43cd72b9 BW |
8518 | { |
8519 | int removed = 0; | |
8520 | unsigned i; | |
8521 | ||
8522 | for (i = 0; i < constraint->action_count; i++) | |
8523 | { | |
8524 | const proposed_action *action = &constraint->actions[i]; | |
8525 | if (action->do_action) | |
8526 | removed += action->removed_bytes; | |
8527 | } | |
8528 | if (removed < 0) | |
e0001a05 NC |
8529 | return FALSE; |
8530 | ||
8531 | return TRUE; | |
8532 | } | |
8533 | ||
8534 | ||
43cd72b9 | 8535 | void |
7fa3d080 BW |
8536 | text_action_add_proposed (text_action_list *l, |
8537 | const ebb_constraint *ebb_table, | |
8538 | asection *sec) | |
e0001a05 NC |
8539 | { |
8540 | unsigned i; | |
8541 | ||
43cd72b9 | 8542 | for (i = 0; i < ebb_table->action_count; i++) |
e0001a05 | 8543 | { |
43cd72b9 | 8544 | proposed_action *action = &ebb_table->actions[i]; |
e0001a05 | 8545 | |
43cd72b9 | 8546 | if (!action->do_action) |
e0001a05 | 8547 | continue; |
43cd72b9 BW |
8548 | switch (action->action) |
8549 | { | |
8550 | case ta_remove_insn: | |
8551 | case ta_remove_longcall: | |
8552 | case ta_convert_longcall: | |
8553 | case ta_narrow_insn: | |
8554 | case ta_widen_insn: | |
8555 | case ta_fill: | |
8556 | case ta_remove_literal: | |
8557 | text_action_add (l, action->action, sec, action->offset, | |
8558 | action->removed_bytes); | |
8559 | break; | |
8560 | case ta_none: | |
8561 | break; | |
8562 | default: | |
8563 | BFD_ASSERT (0); | |
8564 | break; | |
8565 | } | |
e0001a05 | 8566 | } |
43cd72b9 | 8567 | } |
e0001a05 | 8568 | |
43cd72b9 BW |
8569 | |
8570 | int | |
4b8e28c7 | 8571 | xtensa_compute_fill_extra_space (property_table_entry *entry) |
43cd72b9 BW |
8572 | { |
8573 | int fill_extra_space; | |
8574 | ||
8575 | if (!entry) | |
8576 | return 0; | |
8577 | ||
8578 | if ((entry->flags & XTENSA_PROP_UNREACHABLE) == 0) | |
8579 | return 0; | |
8580 | ||
8581 | fill_extra_space = entry->size; | |
8582 | if ((entry->flags & XTENSA_PROP_ALIGN) != 0) | |
8583 | { | |
8584 | /* Fill bytes for alignment: | |
8585 | (2**n)-1 - (addr + (2**n)-1) & (2**n -1) */ | |
8586 | int pow = GET_XTENSA_PROP_ALIGNMENT (entry->flags); | |
8587 | int nsm = (1 << pow) - 1; | |
8588 | bfd_vma addr = entry->address + entry->size; | |
8589 | bfd_vma align_fill = nsm - ((addr + nsm) & nsm); | |
8590 | fill_extra_space += align_fill; | |
8591 | } | |
8592 | return fill_extra_space; | |
e0001a05 NC |
8593 | } |
8594 | ||
43cd72b9 | 8595 | \f |
e0001a05 NC |
8596 | /* First relaxation pass. */ |
8597 | ||
43cd72b9 BW |
8598 | /* If the section contains relaxable literals, check each literal to |
8599 | see if it has the same value as another literal that has already | |
8600 | been seen, either in the current section or a previous one. If so, | |
8601 | add an entry to the per-section list of removed literals. The | |
e0001a05 NC |
8602 | actual changes are deferred until the next pass. */ |
8603 | ||
68ffbac6 | 8604 | static bfd_boolean |
7fa3d080 BW |
8605 | compute_removed_literals (bfd *abfd, |
8606 | asection *sec, | |
8607 | struct bfd_link_info *link_info, | |
8608 | value_map_hash_table *values) | |
e0001a05 NC |
8609 | { |
8610 | xtensa_relax_info *relax_info; | |
8611 | bfd_byte *contents; | |
8612 | Elf_Internal_Rela *internal_relocs; | |
43cd72b9 | 8613 | source_reloc *src_relocs, *rel; |
e0001a05 | 8614 | bfd_boolean ok = TRUE; |
43cd72b9 BW |
8615 | property_table_entry *prop_table = NULL; |
8616 | int ptblsize; | |
8617 | int i, prev_i; | |
8618 | bfd_boolean last_loc_is_prev = FALSE; | |
8619 | bfd_vma last_target_offset = 0; | |
8620 | section_cache_t target_sec_cache; | |
8621 | bfd_size_type sec_size; | |
8622 | ||
8623 | init_section_cache (&target_sec_cache); | |
e0001a05 NC |
8624 | |
8625 | /* Do nothing if it is not a relaxable literal section. */ | |
8626 | relax_info = get_xtensa_relax_info (sec); | |
8627 | BFD_ASSERT (relax_info); | |
e0001a05 NC |
8628 | if (!relax_info->is_relaxable_literal_section) |
8629 | return ok; | |
8630 | ||
68ffbac6 | 8631 | internal_relocs = retrieve_internal_relocs (abfd, sec, |
e0001a05 NC |
8632 | link_info->keep_memory); |
8633 | ||
43cd72b9 | 8634 | sec_size = bfd_get_section_limit (abfd, sec); |
e0001a05 | 8635 | contents = retrieve_contents (abfd, sec, link_info->keep_memory); |
43cd72b9 | 8636 | if (contents == NULL && sec_size != 0) |
e0001a05 NC |
8637 | { |
8638 | ok = FALSE; | |
8639 | goto error_return; | |
8640 | } | |
8641 | ||
8642 | /* Sort the source_relocs by target offset. */ | |
8643 | src_relocs = relax_info->src_relocs; | |
8644 | qsort (src_relocs, relax_info->src_count, | |
8645 | sizeof (source_reloc), source_reloc_compare); | |
43cd72b9 BW |
8646 | qsort (internal_relocs, sec->reloc_count, sizeof (Elf_Internal_Rela), |
8647 | internal_reloc_compare); | |
e0001a05 | 8648 | |
43cd72b9 BW |
8649 | ptblsize = xtensa_read_table_entries (abfd, sec, &prop_table, |
8650 | XTENSA_PROP_SEC_NAME, FALSE); | |
8651 | if (ptblsize < 0) | |
8652 | { | |
8653 | ok = FALSE; | |
8654 | goto error_return; | |
8655 | } | |
8656 | ||
8657 | prev_i = -1; | |
e0001a05 NC |
8658 | for (i = 0; i < relax_info->src_count; i++) |
8659 | { | |
e0001a05 | 8660 | Elf_Internal_Rela *irel = NULL; |
e0001a05 NC |
8661 | |
8662 | rel = &src_relocs[i]; | |
43cd72b9 BW |
8663 | if (get_l32r_opcode () != rel->opcode) |
8664 | continue; | |
e0001a05 NC |
8665 | irel = get_irel_at_offset (sec, internal_relocs, |
8666 | rel->r_rel.target_offset); | |
8667 | ||
43cd72b9 BW |
8668 | /* If the relocation on this is not a simple R_XTENSA_32 or |
8669 | R_XTENSA_PLT then do not consider it. This may happen when | |
8670 | the difference of two symbols is used in a literal. */ | |
8671 | if (irel && (ELF32_R_TYPE (irel->r_info) != R_XTENSA_32 | |
8672 | && ELF32_R_TYPE (irel->r_info) != R_XTENSA_PLT)) | |
8673 | continue; | |
8674 | ||
e0001a05 NC |
8675 | /* If the target_offset for this relocation is the same as the |
8676 | previous relocation, then we've already considered whether the | |
8677 | literal can be coalesced. Skip to the next one.... */ | |
43cd72b9 BW |
8678 | if (i != 0 && prev_i != -1 |
8679 | && src_relocs[i-1].r_rel.target_offset == rel->r_rel.target_offset) | |
e0001a05 | 8680 | continue; |
43cd72b9 BW |
8681 | prev_i = i; |
8682 | ||
68ffbac6 | 8683 | if (last_loc_is_prev && |
43cd72b9 BW |
8684 | last_target_offset + 4 != rel->r_rel.target_offset) |
8685 | last_loc_is_prev = FALSE; | |
e0001a05 NC |
8686 | |
8687 | /* Check if the relocation was from an L32R that is being removed | |
8688 | because a CALLX was converted to a direct CALL, and check if | |
8689 | there are no other relocations to the literal. */ | |
68ffbac6 | 8690 | if (is_removable_literal (rel, i, src_relocs, relax_info->src_count, |
99ded152 | 8691 | sec, prop_table, ptblsize)) |
e0001a05 | 8692 | { |
43cd72b9 BW |
8693 | if (!remove_dead_literal (abfd, sec, link_info, internal_relocs, |
8694 | irel, rel, prop_table, ptblsize)) | |
e0001a05 | 8695 | { |
43cd72b9 BW |
8696 | ok = FALSE; |
8697 | goto error_return; | |
e0001a05 | 8698 | } |
43cd72b9 | 8699 | last_target_offset = rel->r_rel.target_offset; |
e0001a05 NC |
8700 | continue; |
8701 | } | |
8702 | ||
43cd72b9 | 8703 | if (!identify_literal_placement (abfd, sec, contents, link_info, |
68ffbac6 L |
8704 | values, |
8705 | &last_loc_is_prev, irel, | |
43cd72b9 BW |
8706 | relax_info->src_count - i, rel, |
8707 | prop_table, ptblsize, | |
8708 | &target_sec_cache, rel->is_abs_literal)) | |
e0001a05 | 8709 | { |
43cd72b9 BW |
8710 | ok = FALSE; |
8711 | goto error_return; | |
8712 | } | |
8713 | last_target_offset = rel->r_rel.target_offset; | |
8714 | } | |
e0001a05 | 8715 | |
43cd72b9 BW |
8716 | #if DEBUG |
8717 | print_removed_literals (stderr, &relax_info->removed_list); | |
8718 | print_action_list (stderr, &relax_info->action_list); | |
8719 | #endif /* DEBUG */ | |
8720 | ||
8721 | error_return: | |
65e911f9 AM |
8722 | if (prop_table) |
8723 | free (prop_table); | |
8724 | free_section_cache (&target_sec_cache); | |
43cd72b9 BW |
8725 | |
8726 | release_contents (sec, contents); | |
8727 | release_internal_relocs (sec, internal_relocs); | |
8728 | return ok; | |
8729 | } | |
8730 | ||
8731 | ||
8732 | static Elf_Internal_Rela * | |
7fa3d080 BW |
8733 | get_irel_at_offset (asection *sec, |
8734 | Elf_Internal_Rela *internal_relocs, | |
8735 | bfd_vma offset) | |
43cd72b9 BW |
8736 | { |
8737 | unsigned i; | |
8738 | Elf_Internal_Rela *irel; | |
8739 | unsigned r_type; | |
8740 | Elf_Internal_Rela key; | |
8741 | ||
68ffbac6 | 8742 | if (!internal_relocs) |
43cd72b9 BW |
8743 | return NULL; |
8744 | ||
8745 | key.r_offset = offset; | |
8746 | irel = bsearch (&key, internal_relocs, sec->reloc_count, | |
8747 | sizeof (Elf_Internal_Rela), internal_reloc_matches); | |
8748 | if (!irel) | |
8749 | return NULL; | |
8750 | ||
8751 | /* bsearch does not guarantee which will be returned if there are | |
8752 | multiple matches. We need the first that is not an alignment. */ | |
8753 | i = irel - internal_relocs; | |
8754 | while (i > 0) | |
8755 | { | |
8756 | if (internal_relocs[i-1].r_offset != offset) | |
8757 | break; | |
8758 | i--; | |
8759 | } | |
8760 | for ( ; i < sec->reloc_count; i++) | |
8761 | { | |
8762 | irel = &internal_relocs[i]; | |
8763 | r_type = ELF32_R_TYPE (irel->r_info); | |
8764 | if (irel->r_offset == offset && r_type != R_XTENSA_NONE) | |
8765 | return irel; | |
8766 | } | |
8767 | ||
8768 | return NULL; | |
8769 | } | |
8770 | ||
8771 | ||
8772 | bfd_boolean | |
7fa3d080 BW |
8773 | is_removable_literal (const source_reloc *rel, |
8774 | int i, | |
8775 | const source_reloc *src_relocs, | |
99ded152 BW |
8776 | int src_count, |
8777 | asection *sec, | |
8778 | property_table_entry *prop_table, | |
8779 | int ptblsize) | |
43cd72b9 BW |
8780 | { |
8781 | const source_reloc *curr_rel; | |
99ded152 BW |
8782 | property_table_entry *entry; |
8783 | ||
43cd72b9 BW |
8784 | if (!rel->is_null) |
8785 | return FALSE; | |
68ffbac6 L |
8786 | |
8787 | entry = elf_xtensa_find_property_entry (prop_table, ptblsize, | |
99ded152 BW |
8788 | sec->vma + rel->r_rel.target_offset); |
8789 | if (entry && (entry->flags & XTENSA_PROP_NO_TRANSFORM)) | |
8790 | return FALSE; | |
8791 | ||
43cd72b9 BW |
8792 | for (++i; i < src_count; ++i) |
8793 | { | |
8794 | curr_rel = &src_relocs[i]; | |
8795 | /* If all others have the same target offset.... */ | |
8796 | if (curr_rel->r_rel.target_offset != rel->r_rel.target_offset) | |
8797 | return TRUE; | |
8798 | ||
8799 | if (!curr_rel->is_null | |
8800 | && !xtensa_is_property_section (curr_rel->source_sec) | |
8801 | && !(curr_rel->source_sec->flags & SEC_DEBUGGING)) | |
8802 | return FALSE; | |
8803 | } | |
8804 | return TRUE; | |
8805 | } | |
8806 | ||
8807 | ||
68ffbac6 | 8808 | bfd_boolean |
7fa3d080 BW |
8809 | remove_dead_literal (bfd *abfd, |
8810 | asection *sec, | |
8811 | struct bfd_link_info *link_info, | |
8812 | Elf_Internal_Rela *internal_relocs, | |
8813 | Elf_Internal_Rela *irel, | |
8814 | source_reloc *rel, | |
8815 | property_table_entry *prop_table, | |
8816 | int ptblsize) | |
43cd72b9 BW |
8817 | { |
8818 | property_table_entry *entry; | |
8819 | xtensa_relax_info *relax_info; | |
8820 | ||
8821 | relax_info = get_xtensa_relax_info (sec); | |
8822 | if (!relax_info) | |
8823 | return FALSE; | |
8824 | ||
8825 | entry = elf_xtensa_find_property_entry (prop_table, ptblsize, | |
8826 | sec->vma + rel->r_rel.target_offset); | |
8827 | ||
8828 | /* Mark the unused literal so that it will be removed. */ | |
8829 | add_removed_literal (&relax_info->removed_list, &rel->r_rel, NULL); | |
8830 | ||
8831 | text_action_add (&relax_info->action_list, | |
8832 | ta_remove_literal, sec, rel->r_rel.target_offset, 4); | |
8833 | ||
8834 | /* If the section is 4-byte aligned, do not add fill. */ | |
68ffbac6 | 8835 | if (sec->alignment_power > 2) |
43cd72b9 BW |
8836 | { |
8837 | int fill_extra_space; | |
8838 | bfd_vma entry_sec_offset; | |
8839 | text_action *fa; | |
8840 | property_table_entry *the_add_entry; | |
8841 | int removed_diff; | |
8842 | ||
8843 | if (entry) | |
8844 | entry_sec_offset = entry->address - sec->vma + entry->size; | |
8845 | else | |
8846 | entry_sec_offset = rel->r_rel.target_offset + 4; | |
8847 | ||
8848 | /* If the literal range is at the end of the section, | |
8849 | do not add fill. */ | |
8850 | the_add_entry = elf_xtensa_find_property_entry (prop_table, ptblsize, | |
8851 | entry_sec_offset); | |
4b8e28c7 | 8852 | fill_extra_space = xtensa_compute_fill_extra_space (the_add_entry); |
43cd72b9 BW |
8853 | |
8854 | fa = find_fill_action (&relax_info->action_list, sec, entry_sec_offset); | |
8855 | removed_diff = compute_removed_action_diff (fa, sec, entry_sec_offset, | |
8856 | -4, fill_extra_space); | |
8857 | if (fa) | |
8858 | adjust_fill_action (fa, removed_diff); | |
8859 | else | |
8860 | text_action_add (&relax_info->action_list, | |
8861 | ta_fill, sec, entry_sec_offset, removed_diff); | |
8862 | } | |
8863 | ||
8864 | /* Zero out the relocation on this literal location. */ | |
8865 | if (irel) | |
8866 | { | |
8867 | if (elf_hash_table (link_info)->dynamic_sections_created) | |
8868 | shrink_dynamic_reloc_sections (link_info, abfd, sec, irel); | |
8869 | ||
8870 | irel->r_info = ELF32_R_INFO (0, R_XTENSA_NONE); | |
8871 | pin_internal_relocs (sec, internal_relocs); | |
8872 | } | |
8873 | ||
8874 | /* Do not modify "last_loc_is_prev". */ | |
8875 | return TRUE; | |
8876 | } | |
8877 | ||
8878 | ||
68ffbac6 | 8879 | bfd_boolean |
7fa3d080 BW |
8880 | identify_literal_placement (bfd *abfd, |
8881 | asection *sec, | |
8882 | bfd_byte *contents, | |
8883 | struct bfd_link_info *link_info, | |
8884 | value_map_hash_table *values, | |
8885 | bfd_boolean *last_loc_is_prev_p, | |
8886 | Elf_Internal_Rela *irel, | |
8887 | int remaining_src_rels, | |
8888 | source_reloc *rel, | |
8889 | property_table_entry *prop_table, | |
8890 | int ptblsize, | |
8891 | section_cache_t *target_sec_cache, | |
8892 | bfd_boolean is_abs_literal) | |
43cd72b9 BW |
8893 | { |
8894 | literal_value val; | |
8895 | value_map *val_map; | |
8896 | xtensa_relax_info *relax_info; | |
8897 | bfd_boolean literal_placed = FALSE; | |
8898 | r_reloc r_rel; | |
8899 | unsigned long value; | |
8900 | bfd_boolean final_static_link; | |
8901 | bfd_size_type sec_size; | |
8902 | ||
8903 | relax_info = get_xtensa_relax_info (sec); | |
8904 | if (!relax_info) | |
8905 | return FALSE; | |
8906 | ||
8907 | sec_size = bfd_get_section_limit (abfd, sec); | |
8908 | ||
8909 | final_static_link = | |
0e1862bb | 8910 | (!bfd_link_relocatable (link_info) |
43cd72b9 BW |
8911 | && !elf_hash_table (link_info)->dynamic_sections_created); |
8912 | ||
8913 | /* The placement algorithm first checks to see if the literal is | |
8914 | already in the value map. If so and the value map is reachable | |
8915 | from all uses, then the literal is moved to that location. If | |
8916 | not, then we identify the last location where a fresh literal was | |
8917 | placed. If the literal can be safely moved there, then we do so. | |
8918 | If not, then we assume that the literal is not to move and leave | |
8919 | the literal where it is, marking it as the last literal | |
8920 | location. */ | |
8921 | ||
8922 | /* Find the literal value. */ | |
8923 | value = 0; | |
8924 | r_reloc_init (&r_rel, abfd, irel, contents, sec_size); | |
8925 | if (!irel) | |
8926 | { | |
8927 | BFD_ASSERT (rel->r_rel.target_offset < sec_size); | |
8928 | value = bfd_get_32 (abfd, contents + rel->r_rel.target_offset); | |
8929 | } | |
8930 | init_literal_value (&val, &r_rel, value, is_abs_literal); | |
8931 | ||
8932 | /* Check if we've seen another literal with the same value that | |
8933 | is in the same output section. */ | |
8934 | val_map = value_map_get_cached_value (values, &val, final_static_link); | |
8935 | ||
8936 | if (val_map | |
8937 | && (r_reloc_get_section (&val_map->loc)->output_section | |
8938 | == sec->output_section) | |
8939 | && relocations_reach (rel, remaining_src_rels, &val_map->loc) | |
8940 | && coalesce_shared_literal (sec, rel, prop_table, ptblsize, val_map)) | |
8941 | { | |
8942 | /* No change to last_loc_is_prev. */ | |
8943 | literal_placed = TRUE; | |
8944 | } | |
8945 | ||
8946 | /* For relocatable links, do not try to move literals. To do it | |
8947 | correctly might increase the number of relocations in an input | |
8948 | section making the default relocatable linking fail. */ | |
0e1862bb | 8949 | if (!bfd_link_relocatable (link_info) && !literal_placed |
43cd72b9 BW |
8950 | && values->has_last_loc && !(*last_loc_is_prev_p)) |
8951 | { | |
8952 | asection *target_sec = r_reloc_get_section (&values->last_loc); | |
8953 | if (target_sec && target_sec->output_section == sec->output_section) | |
8954 | { | |
8955 | /* Increment the virtual offset. */ | |
8956 | r_reloc try_loc = values->last_loc; | |
8957 | try_loc.virtual_offset += 4; | |
8958 | ||
8959 | /* There is a last loc that was in the same output section. */ | |
8960 | if (relocations_reach (rel, remaining_src_rels, &try_loc) | |
8961 | && move_shared_literal (sec, link_info, rel, | |
68ffbac6 | 8962 | prop_table, ptblsize, |
43cd72b9 | 8963 | &try_loc, &val, target_sec_cache)) |
e0001a05 | 8964 | { |
43cd72b9 BW |
8965 | values->last_loc.virtual_offset += 4; |
8966 | literal_placed = TRUE; | |
8967 | if (!val_map) | |
8968 | val_map = add_value_map (values, &val, &try_loc, | |
8969 | final_static_link); | |
8970 | else | |
8971 | val_map->loc = try_loc; | |
e0001a05 NC |
8972 | } |
8973 | } | |
43cd72b9 BW |
8974 | } |
8975 | ||
8976 | if (!literal_placed) | |
8977 | { | |
8978 | /* Nothing worked, leave the literal alone but update the last loc. */ | |
8979 | values->has_last_loc = TRUE; | |
8980 | values->last_loc = rel->r_rel; | |
8981 | if (!val_map) | |
8982 | val_map = add_value_map (values, &val, &rel->r_rel, final_static_link); | |
e0001a05 | 8983 | else |
43cd72b9 BW |
8984 | val_map->loc = rel->r_rel; |
8985 | *last_loc_is_prev_p = TRUE; | |
e0001a05 NC |
8986 | } |
8987 | ||
43cd72b9 | 8988 | return TRUE; |
e0001a05 NC |
8989 | } |
8990 | ||
8991 | ||
8992 | /* Check if the original relocations (presumably on L32R instructions) | |
8993 | identified by reloc[0..N] can be changed to reference the literal | |
8994 | identified by r_rel. If r_rel is out of range for any of the | |
8995 | original relocations, then we don't want to coalesce the original | |
8996 | literal with the one at r_rel. We only check reloc[0..N], where the | |
8997 | offsets are all the same as for reloc[0] (i.e., they're all | |
8998 | referencing the same literal) and where N is also bounded by the | |
8999 | number of remaining entries in the "reloc" array. The "reloc" array | |
9000 | is sorted by target offset so we know all the entries for the same | |
9001 | literal will be contiguous. */ | |
9002 | ||
9003 | static bfd_boolean | |
7fa3d080 BW |
9004 | relocations_reach (source_reloc *reloc, |
9005 | int remaining_relocs, | |
9006 | const r_reloc *r_rel) | |
e0001a05 NC |
9007 | { |
9008 | bfd_vma from_offset, source_address, dest_address; | |
9009 | asection *sec; | |
9010 | int i; | |
9011 | ||
9012 | if (!r_reloc_is_defined (r_rel)) | |
9013 | return FALSE; | |
9014 | ||
9015 | sec = r_reloc_get_section (r_rel); | |
9016 | from_offset = reloc[0].r_rel.target_offset; | |
9017 | ||
9018 | for (i = 0; i < remaining_relocs; i++) | |
9019 | { | |
9020 | if (reloc[i].r_rel.target_offset != from_offset) | |
9021 | break; | |
9022 | ||
9023 | /* Ignore relocations that have been removed. */ | |
9024 | if (reloc[i].is_null) | |
9025 | continue; | |
9026 | ||
9027 | /* The original and new output section for these must be the same | |
07d6d2b8 | 9028 | in order to coalesce. */ |
e0001a05 NC |
9029 | if (r_reloc_get_section (&reloc[i].r_rel)->output_section |
9030 | != sec->output_section) | |
9031 | return FALSE; | |
9032 | ||
d638e0ac BW |
9033 | /* Absolute literals in the same output section can always be |
9034 | combined. */ | |
9035 | if (reloc[i].is_abs_literal) | |
9036 | continue; | |
9037 | ||
43cd72b9 BW |
9038 | /* A literal with no PC-relative relocations can be moved anywhere. */ |
9039 | if (reloc[i].opnd != -1) | |
e0001a05 NC |
9040 | { |
9041 | /* Otherwise, check to see that it fits. */ | |
9042 | source_address = (reloc[i].source_sec->output_section->vma | |
9043 | + reloc[i].source_sec->output_offset | |
9044 | + reloc[i].r_rel.rela.r_offset); | |
9045 | dest_address = (sec->output_section->vma | |
9046 | + sec->output_offset | |
9047 | + r_rel->target_offset); | |
9048 | ||
43cd72b9 BW |
9049 | if (!pcrel_reloc_fits (reloc[i].opcode, reloc[i].opnd, |
9050 | source_address, dest_address)) | |
e0001a05 NC |
9051 | return FALSE; |
9052 | } | |
9053 | } | |
9054 | ||
9055 | return TRUE; | |
9056 | } | |
9057 | ||
9058 | ||
43cd72b9 BW |
9059 | /* Move a literal to another literal location because it is |
9060 | the same as the other literal value. */ | |
e0001a05 | 9061 | |
68ffbac6 | 9062 | static bfd_boolean |
7fa3d080 BW |
9063 | coalesce_shared_literal (asection *sec, |
9064 | source_reloc *rel, | |
9065 | property_table_entry *prop_table, | |
9066 | int ptblsize, | |
9067 | value_map *val_map) | |
e0001a05 | 9068 | { |
43cd72b9 BW |
9069 | property_table_entry *entry; |
9070 | text_action *fa; | |
9071 | property_table_entry *the_add_entry; | |
9072 | int removed_diff; | |
9073 | xtensa_relax_info *relax_info; | |
9074 | ||
9075 | relax_info = get_xtensa_relax_info (sec); | |
9076 | if (!relax_info) | |
9077 | return FALSE; | |
9078 | ||
9079 | entry = elf_xtensa_find_property_entry | |
9080 | (prop_table, ptblsize, sec->vma + rel->r_rel.target_offset); | |
99ded152 | 9081 | if (entry && (entry->flags & XTENSA_PROP_NO_TRANSFORM)) |
43cd72b9 BW |
9082 | return TRUE; |
9083 | ||
9084 | /* Mark that the literal will be coalesced. */ | |
9085 | add_removed_literal (&relax_info->removed_list, &rel->r_rel, &val_map->loc); | |
9086 | ||
9087 | text_action_add (&relax_info->action_list, | |
9088 | ta_remove_literal, sec, rel->r_rel.target_offset, 4); | |
9089 | ||
9090 | /* If the section is 4-byte aligned, do not add fill. */ | |
68ffbac6 | 9091 | if (sec->alignment_power > 2) |
e0001a05 | 9092 | { |
43cd72b9 BW |
9093 | int fill_extra_space; |
9094 | bfd_vma entry_sec_offset; | |
9095 | ||
9096 | if (entry) | |
9097 | entry_sec_offset = entry->address - sec->vma + entry->size; | |
9098 | else | |
9099 | entry_sec_offset = rel->r_rel.target_offset + 4; | |
9100 | ||
9101 | /* If the literal range is at the end of the section, | |
9102 | do not add fill. */ | |
9103 | fill_extra_space = 0; | |
9104 | the_add_entry = elf_xtensa_find_property_entry (prop_table, ptblsize, | |
9105 | entry_sec_offset); | |
9106 | if (the_add_entry && (the_add_entry->flags & XTENSA_PROP_UNREACHABLE)) | |
9107 | fill_extra_space = the_add_entry->size; | |
9108 | ||
9109 | fa = find_fill_action (&relax_info->action_list, sec, entry_sec_offset); | |
9110 | removed_diff = compute_removed_action_diff (fa, sec, entry_sec_offset, | |
9111 | -4, fill_extra_space); | |
9112 | if (fa) | |
9113 | adjust_fill_action (fa, removed_diff); | |
9114 | else | |
9115 | text_action_add (&relax_info->action_list, | |
9116 | ta_fill, sec, entry_sec_offset, removed_diff); | |
e0001a05 | 9117 | } |
43cd72b9 BW |
9118 | |
9119 | return TRUE; | |
9120 | } | |
9121 | ||
9122 | ||
9123 | /* Move a literal to another location. This may actually increase the | |
9124 | total amount of space used because of alignments so we need to do | |
9125 | this carefully. Also, it may make a branch go out of range. */ | |
9126 | ||
68ffbac6 | 9127 | static bfd_boolean |
7fa3d080 BW |
9128 | move_shared_literal (asection *sec, |
9129 | struct bfd_link_info *link_info, | |
9130 | source_reloc *rel, | |
9131 | property_table_entry *prop_table, | |
9132 | int ptblsize, | |
9133 | const r_reloc *target_loc, | |
9134 | const literal_value *lit_value, | |
9135 | section_cache_t *target_sec_cache) | |
43cd72b9 BW |
9136 | { |
9137 | property_table_entry *the_add_entry, *src_entry, *target_entry = NULL; | |
9138 | text_action *fa, *target_fa; | |
9139 | int removed_diff; | |
9140 | xtensa_relax_info *relax_info, *target_relax_info; | |
9141 | asection *target_sec; | |
9142 | ebb_t *ebb; | |
9143 | ebb_constraint ebb_table; | |
9144 | bfd_boolean relocs_fit; | |
9145 | ||
9146 | /* If this routine always returns FALSE, the literals that cannot be | |
9147 | coalesced will not be moved. */ | |
9148 | if (elf32xtensa_no_literal_movement) | |
9149 | return FALSE; | |
9150 | ||
9151 | relax_info = get_xtensa_relax_info (sec); | |
9152 | if (!relax_info) | |
9153 | return FALSE; | |
9154 | ||
9155 | target_sec = r_reloc_get_section (target_loc); | |
9156 | target_relax_info = get_xtensa_relax_info (target_sec); | |
9157 | ||
9158 | /* Literals to undefined sections may not be moved because they | |
9159 | must report an error. */ | |
9160 | if (bfd_is_und_section (target_sec)) | |
9161 | return FALSE; | |
9162 | ||
9163 | src_entry = elf_xtensa_find_property_entry | |
9164 | (prop_table, ptblsize, sec->vma + rel->r_rel.target_offset); | |
9165 | ||
9166 | if (!section_cache_section (target_sec_cache, target_sec, link_info)) | |
9167 | return FALSE; | |
9168 | ||
9169 | target_entry = elf_xtensa_find_property_entry | |
68ffbac6 | 9170 | (target_sec_cache->ptbl, target_sec_cache->pte_count, |
43cd72b9 BW |
9171 | target_sec->vma + target_loc->target_offset); |
9172 | ||
9173 | if (!target_entry) | |
9174 | return FALSE; | |
9175 | ||
9176 | /* Make sure that we have not broken any branches. */ | |
9177 | relocs_fit = FALSE; | |
9178 | ||
9179 | init_ebb_constraint (&ebb_table); | |
9180 | ebb = &ebb_table.ebb; | |
68ffbac6 | 9181 | init_ebb (ebb, target_sec_cache->sec, target_sec_cache->contents, |
43cd72b9 BW |
9182 | target_sec_cache->content_length, |
9183 | target_sec_cache->ptbl, target_sec_cache->pte_count, | |
9184 | target_sec_cache->relocs, target_sec_cache->reloc_count); | |
9185 | ||
9186 | /* Propose to add 4 bytes + worst-case alignment size increase to | |
9187 | destination. */ | |
9188 | ebb_propose_action (&ebb_table, EBB_NO_ALIGN, 0, | |
9189 | ta_fill, target_loc->target_offset, | |
9190 | -4 - (1 << target_sec->alignment_power), TRUE); | |
9191 | ||
9192 | /* Check all of the PC-relative relocations to make sure they still fit. */ | |
68ffbac6 | 9193 | relocs_fit = check_section_ebb_pcrels_fit (target_sec->owner, target_sec, |
43cd72b9 | 9194 | target_sec_cache->contents, |
b2b326d2 | 9195 | target_sec_cache->relocs, NULL, |
cb337148 | 9196 | &ebb_table, NULL); |
43cd72b9 | 9197 | |
68ffbac6 | 9198 | if (!relocs_fit) |
43cd72b9 BW |
9199 | return FALSE; |
9200 | ||
9201 | text_action_add_literal (&target_relax_info->action_list, | |
9202 | ta_add_literal, target_loc, lit_value, -4); | |
9203 | ||
68ffbac6 | 9204 | if (target_sec->alignment_power > 2 && target_entry != src_entry) |
43cd72b9 BW |
9205 | { |
9206 | /* May need to add or remove some fill to maintain alignment. */ | |
9207 | int fill_extra_space; | |
9208 | bfd_vma entry_sec_offset; | |
9209 | ||
68ffbac6 | 9210 | entry_sec_offset = |
43cd72b9 BW |
9211 | target_entry->address - target_sec->vma + target_entry->size; |
9212 | ||
9213 | /* If the literal range is at the end of the section, | |
9214 | do not add fill. */ | |
9215 | fill_extra_space = 0; | |
9216 | the_add_entry = | |
9217 | elf_xtensa_find_property_entry (target_sec_cache->ptbl, | |
9218 | target_sec_cache->pte_count, | |
9219 | entry_sec_offset); | |
9220 | if (the_add_entry && (the_add_entry->flags & XTENSA_PROP_UNREACHABLE)) | |
9221 | fill_extra_space = the_add_entry->size; | |
9222 | ||
9223 | target_fa = find_fill_action (&target_relax_info->action_list, | |
9224 | target_sec, entry_sec_offset); | |
9225 | removed_diff = compute_removed_action_diff (target_fa, target_sec, | |
9226 | entry_sec_offset, 4, | |
9227 | fill_extra_space); | |
9228 | if (target_fa) | |
9229 | adjust_fill_action (target_fa, removed_diff); | |
9230 | else | |
9231 | text_action_add (&target_relax_info->action_list, | |
9232 | ta_fill, target_sec, entry_sec_offset, removed_diff); | |
9233 | } | |
9234 | ||
9235 | /* Mark that the literal will be moved to the new location. */ | |
9236 | add_removed_literal (&relax_info->removed_list, &rel->r_rel, target_loc); | |
9237 | ||
9238 | /* Remove the literal. */ | |
9239 | text_action_add (&relax_info->action_list, | |
9240 | ta_remove_literal, sec, rel->r_rel.target_offset, 4); | |
9241 | ||
9242 | /* If the section is 4-byte aligned, do not add fill. */ | |
68ffbac6 | 9243 | if (sec->alignment_power > 2 && target_entry != src_entry) |
43cd72b9 BW |
9244 | { |
9245 | int fill_extra_space; | |
9246 | bfd_vma entry_sec_offset; | |
9247 | ||
9248 | if (src_entry) | |
9249 | entry_sec_offset = src_entry->address - sec->vma + src_entry->size; | |
9250 | else | |
9251 | entry_sec_offset = rel->r_rel.target_offset+4; | |
9252 | ||
9253 | /* If the literal range is at the end of the section, | |
9254 | do not add fill. */ | |
9255 | fill_extra_space = 0; | |
9256 | the_add_entry = elf_xtensa_find_property_entry (prop_table, ptblsize, | |
9257 | entry_sec_offset); | |
9258 | if (the_add_entry && (the_add_entry->flags & XTENSA_PROP_UNREACHABLE)) | |
9259 | fill_extra_space = the_add_entry->size; | |
9260 | ||
9261 | fa = find_fill_action (&relax_info->action_list, sec, entry_sec_offset); | |
9262 | removed_diff = compute_removed_action_diff (fa, sec, entry_sec_offset, | |
9263 | -4, fill_extra_space); | |
9264 | if (fa) | |
9265 | adjust_fill_action (fa, removed_diff); | |
9266 | else | |
9267 | text_action_add (&relax_info->action_list, | |
9268 | ta_fill, sec, entry_sec_offset, removed_diff); | |
9269 | } | |
9270 | ||
9271 | return TRUE; | |
e0001a05 NC |
9272 | } |
9273 | ||
9274 | \f | |
9275 | /* Second relaxation pass. */ | |
9276 | ||
4c2af04f MF |
9277 | static int |
9278 | action_remove_bytes_fn (splay_tree_node node, void *p) | |
9279 | { | |
9280 | bfd_size_type *final_size = p; | |
9281 | text_action *action = (text_action *)node->value; | |
9282 | ||
9283 | *final_size -= action->removed_bytes; | |
9284 | return 0; | |
9285 | } | |
9286 | ||
e0001a05 NC |
9287 | /* Modify all of the relocations to point to the right spot, and if this |
9288 | is a relaxable section, delete the unwanted literals and fix the | |
43cd72b9 | 9289 | section size. */ |
e0001a05 | 9290 | |
43cd72b9 | 9291 | bfd_boolean |
7fa3d080 | 9292 | relax_section (bfd *abfd, asection *sec, struct bfd_link_info *link_info) |
e0001a05 NC |
9293 | { |
9294 | Elf_Internal_Rela *internal_relocs; | |
9295 | xtensa_relax_info *relax_info; | |
9296 | bfd_byte *contents; | |
9297 | bfd_boolean ok = TRUE; | |
9298 | unsigned i; | |
43cd72b9 BW |
9299 | bfd_boolean rv = FALSE; |
9300 | bfd_boolean virtual_action; | |
9301 | bfd_size_type sec_size; | |
e0001a05 | 9302 | |
43cd72b9 | 9303 | sec_size = bfd_get_section_limit (abfd, sec); |
e0001a05 NC |
9304 | relax_info = get_xtensa_relax_info (sec); |
9305 | BFD_ASSERT (relax_info); | |
9306 | ||
43cd72b9 BW |
9307 | /* First translate any of the fixes that have been added already. */ |
9308 | translate_section_fixes (sec); | |
9309 | ||
e0001a05 NC |
9310 | /* Handle property sections (e.g., literal tables) specially. */ |
9311 | if (xtensa_is_property_section (sec)) | |
9312 | { | |
9313 | BFD_ASSERT (!relax_info->is_relaxable_literal_section); | |
9314 | return relax_property_section (abfd, sec, link_info); | |
9315 | } | |
9316 | ||
68ffbac6 | 9317 | internal_relocs = retrieve_internal_relocs (abfd, sec, |
43cd72b9 | 9318 | link_info->keep_memory); |
4c2af04f | 9319 | if (!internal_relocs && !action_list_count (&relax_info->action_list)) |
7aa09196 SA |
9320 | return TRUE; |
9321 | ||
43cd72b9 BW |
9322 | contents = retrieve_contents (abfd, sec, link_info->keep_memory); |
9323 | if (contents == NULL && sec_size != 0) | |
9324 | { | |
9325 | ok = FALSE; | |
9326 | goto error_return; | |
9327 | } | |
9328 | ||
9329 | if (internal_relocs) | |
9330 | { | |
9331 | for (i = 0; i < sec->reloc_count; i++) | |
9332 | { | |
9333 | Elf_Internal_Rela *irel; | |
9334 | xtensa_relax_info *target_relax_info; | |
9335 | bfd_vma source_offset, old_source_offset; | |
9336 | r_reloc r_rel; | |
9337 | unsigned r_type; | |
9338 | asection *target_sec; | |
9339 | ||
9340 | /* Locally change the source address. | |
9341 | Translate the target to the new target address. | |
9342 | If it points to this section and has been removed, | |
9343 | NULLify it. | |
9344 | Write it back. */ | |
9345 | ||
9346 | irel = &internal_relocs[i]; | |
9347 | source_offset = irel->r_offset; | |
9348 | old_source_offset = source_offset; | |
9349 | ||
9350 | r_type = ELF32_R_TYPE (irel->r_info); | |
9351 | r_reloc_init (&r_rel, abfd, irel, contents, | |
9352 | bfd_get_section_limit (abfd, sec)); | |
9353 | ||
9354 | /* If this section could have changed then we may need to | |
9355 | change the relocation's offset. */ | |
9356 | ||
9357 | if (relax_info->is_relaxable_literal_section | |
9358 | || relax_info->is_relaxable_asm_section) | |
9359 | { | |
9b7f5d20 BW |
9360 | pin_internal_relocs (sec, internal_relocs); |
9361 | ||
43cd72b9 BW |
9362 | if (r_type != R_XTENSA_NONE |
9363 | && find_removed_literal (&relax_info->removed_list, | |
9364 | irel->r_offset)) | |
9365 | { | |
9366 | /* Remove this relocation. */ | |
9367 | if (elf_hash_table (link_info)->dynamic_sections_created) | |
9368 | shrink_dynamic_reloc_sections (link_info, abfd, sec, irel); | |
9369 | irel->r_info = ELF32_R_INFO (0, R_XTENSA_NONE); | |
071aa5c9 | 9370 | irel->r_offset = offset_with_removed_text_map |
43cd72b9 | 9371 | (&relax_info->action_list, irel->r_offset); |
43cd72b9 BW |
9372 | continue; |
9373 | } | |
9374 | ||
9375 | if (r_type == R_XTENSA_ASM_SIMPLIFY) | |
9376 | { | |
9377 | text_action *action = | |
9378 | find_insn_action (&relax_info->action_list, | |
9379 | irel->r_offset); | |
9380 | if (action && (action->action == ta_convert_longcall | |
9381 | || action->action == ta_remove_longcall)) | |
9382 | { | |
9383 | bfd_reloc_status_type retval; | |
9384 | char *error_message = NULL; | |
9385 | ||
9386 | retval = contract_asm_expansion (contents, sec_size, | |
9387 | irel, &error_message); | |
9388 | if (retval != bfd_reloc_ok) | |
9389 | { | |
9390 | (*link_info->callbacks->reloc_dangerous) | |
9391 | (link_info, error_message, abfd, sec, | |
9392 | irel->r_offset); | |
9393 | goto error_return; | |
9394 | } | |
9395 | /* Update the action so that the code that moves | |
9396 | the contents will do the right thing. */ | |
4c2af04f | 9397 | /* ta_remove_longcall and ta_remove_insn actions are |
07d6d2b8 | 9398 | grouped together in the tree as well as |
4c2af04f MF |
9399 | ta_convert_longcall and ta_none, so that changes below |
9400 | can be done w/o removing and reinserting action into | |
9401 | the tree. */ | |
9402 | ||
43cd72b9 BW |
9403 | if (action->action == ta_remove_longcall) |
9404 | action->action = ta_remove_insn; | |
9405 | else | |
9406 | action->action = ta_none; | |
9407 | /* Refresh the info in the r_rel. */ | |
9408 | r_reloc_init (&r_rel, abfd, irel, contents, sec_size); | |
9409 | r_type = ELF32_R_TYPE (irel->r_info); | |
9410 | } | |
9411 | } | |
9412 | ||
071aa5c9 | 9413 | source_offset = offset_with_removed_text_map |
43cd72b9 BW |
9414 | (&relax_info->action_list, irel->r_offset); |
9415 | irel->r_offset = source_offset; | |
9416 | } | |
9417 | ||
9418 | /* If the target section could have changed then | |
9419 | we may need to change the relocation's target offset. */ | |
9420 | ||
9421 | target_sec = r_reloc_get_section (&r_rel); | |
43cd72b9 | 9422 | |
ae326da8 BW |
9423 | /* For a reference to a discarded section from a DWARF section, |
9424 | i.e., where action_discarded is PRETEND, the symbol will | |
9425 | eventually be modified to refer to the kept section (at least if | |
9426 | the kept and discarded sections are the same size). Anticipate | |
9427 | that here and adjust things accordingly. */ | |
9428 | if (! elf_xtensa_ignore_discarded_relocs (sec) | |
9429 | && elf_xtensa_action_discarded (sec) == PRETEND | |
dbaa2011 | 9430 | && sec->sec_info_type != SEC_INFO_TYPE_STABS |
ae326da8 | 9431 | && target_sec != NULL |
dbaa2011 | 9432 | && discarded_section (target_sec)) |
ae326da8 BW |
9433 | { |
9434 | /* It would be natural to call _bfd_elf_check_kept_section | |
9435 | here, but it's not exported from elflink.c. It's also a | |
9436 | fairly expensive check. Adjusting the relocations to the | |
9437 | discarded section is fairly harmless; it will only adjust | |
9438 | some addends and difference values. If it turns out that | |
9439 | _bfd_elf_check_kept_section fails later, it won't matter, | |
9440 | so just compare the section names to find the right group | |
9441 | member. */ | |
9442 | asection *kept = target_sec->kept_section; | |
9443 | if (kept != NULL) | |
9444 | { | |
9445 | if ((kept->flags & SEC_GROUP) != 0) | |
9446 | { | |
9447 | asection *first = elf_next_in_group (kept); | |
9448 | asection *s = first; | |
9449 | ||
9450 | kept = NULL; | |
9451 | while (s != NULL) | |
9452 | { | |
9453 | if (strcmp (s->name, target_sec->name) == 0) | |
9454 | { | |
9455 | kept = s; | |
9456 | break; | |
9457 | } | |
9458 | s = elf_next_in_group (s); | |
9459 | if (s == first) | |
9460 | break; | |
9461 | } | |
9462 | } | |
9463 | } | |
9464 | if (kept != NULL | |
9465 | && ((target_sec->rawsize != 0 | |
9466 | ? target_sec->rawsize : target_sec->size) | |
9467 | == (kept->rawsize != 0 ? kept->rawsize : kept->size))) | |
9468 | target_sec = kept; | |
9469 | } | |
9470 | ||
9471 | target_relax_info = get_xtensa_relax_info (target_sec); | |
43cd72b9 BW |
9472 | if (target_relax_info |
9473 | && (target_relax_info->is_relaxable_literal_section | |
9474 | || target_relax_info->is_relaxable_asm_section)) | |
9475 | { | |
9476 | r_reloc new_reloc; | |
9b7f5d20 | 9477 | target_sec = translate_reloc (&r_rel, &new_reloc, target_sec); |
43cd72b9 BW |
9478 | |
9479 | if (r_type == R_XTENSA_DIFF8 | |
9480 | || r_type == R_XTENSA_DIFF16 | |
9481 | || r_type == R_XTENSA_DIFF32) | |
9482 | { | |
1058c753 VA |
9483 | bfd_signed_vma diff_value = 0; |
9484 | bfd_vma new_end_offset, diff_mask = 0; | |
43cd72b9 BW |
9485 | |
9486 | if (bfd_get_section_limit (abfd, sec) < old_source_offset) | |
9487 | { | |
9488 | (*link_info->callbacks->reloc_dangerous) | |
9489 | (link_info, _("invalid relocation address"), | |
9490 | abfd, sec, old_source_offset); | |
9491 | goto error_return; | |
9492 | } | |
9493 | ||
9494 | switch (r_type) | |
9495 | { | |
9496 | case R_XTENSA_DIFF8: | |
9497 | diff_value = | |
1058c753 | 9498 | bfd_get_signed_8 (abfd, &contents[old_source_offset]); |
43cd72b9 BW |
9499 | break; |
9500 | case R_XTENSA_DIFF16: | |
9501 | diff_value = | |
1058c753 | 9502 | bfd_get_signed_16 (abfd, &contents[old_source_offset]); |
43cd72b9 BW |
9503 | break; |
9504 | case R_XTENSA_DIFF32: | |
9505 | diff_value = | |
1058c753 | 9506 | bfd_get_signed_32 (abfd, &contents[old_source_offset]); |
43cd72b9 BW |
9507 | break; |
9508 | } | |
9509 | ||
071aa5c9 | 9510 | new_end_offset = offset_with_removed_text_map |
43cd72b9 BW |
9511 | (&target_relax_info->action_list, |
9512 | r_rel.target_offset + diff_value); | |
9513 | diff_value = new_end_offset - new_reloc.target_offset; | |
9514 | ||
9515 | switch (r_type) | |
9516 | { | |
9517 | case R_XTENSA_DIFF8: | |
1058c753 VA |
9518 | diff_mask = 0x7f; |
9519 | bfd_put_signed_8 (abfd, diff_value, | |
43cd72b9 BW |
9520 | &contents[old_source_offset]); |
9521 | break; | |
9522 | case R_XTENSA_DIFF16: | |
1058c753 VA |
9523 | diff_mask = 0x7fff; |
9524 | bfd_put_signed_16 (abfd, diff_value, | |
43cd72b9 BW |
9525 | &contents[old_source_offset]); |
9526 | break; | |
9527 | case R_XTENSA_DIFF32: | |
1058c753 VA |
9528 | diff_mask = 0x7fffffff; |
9529 | bfd_put_signed_32 (abfd, diff_value, | |
43cd72b9 BW |
9530 | &contents[old_source_offset]); |
9531 | break; | |
9532 | } | |
9533 | ||
1058c753 VA |
9534 | /* Check for overflow. Sign bits must be all zeroes or all ones */ |
9535 | if ((diff_value & ~diff_mask) != 0 && | |
9536 | (diff_value & ~diff_mask) != (-1 & ~diff_mask)) | |
43cd72b9 BW |
9537 | { |
9538 | (*link_info->callbacks->reloc_dangerous) | |
9539 | (link_info, _("overflow after relaxation"), | |
9540 | abfd, sec, old_source_offset); | |
9541 | goto error_return; | |
9542 | } | |
9543 | ||
9544 | pin_contents (sec, contents); | |
9545 | } | |
dc96b90a BW |
9546 | |
9547 | /* If the relocation still references a section in the same | |
9548 | input file, modify the relocation directly instead of | |
9549 | adding a "fix" record. */ | |
9550 | if (target_sec->owner == abfd) | |
9551 | { | |
9552 | unsigned r_symndx = ELF32_R_SYM (new_reloc.rela.r_info); | |
9553 | irel->r_info = ELF32_R_INFO (r_symndx, r_type); | |
9554 | irel->r_addend = new_reloc.rela.r_addend; | |
9555 | pin_internal_relocs (sec, internal_relocs); | |
9556 | } | |
9b7f5d20 BW |
9557 | else |
9558 | { | |
dc96b90a BW |
9559 | bfd_vma addend_displacement; |
9560 | reloc_bfd_fix *fix; | |
9561 | ||
9562 | addend_displacement = | |
9563 | new_reloc.target_offset + new_reloc.virtual_offset; | |
9564 | fix = reloc_bfd_fix_init (sec, source_offset, r_type, | |
9565 | target_sec, | |
9566 | addend_displacement, TRUE); | |
9567 | add_fix (sec, fix); | |
9b7f5d20 | 9568 | } |
43cd72b9 | 9569 | } |
43cd72b9 BW |
9570 | } |
9571 | } | |
9572 | ||
9573 | if ((relax_info->is_relaxable_literal_section | |
9574 | || relax_info->is_relaxable_asm_section) | |
4c2af04f | 9575 | && action_list_count (&relax_info->action_list)) |
43cd72b9 BW |
9576 | { |
9577 | /* Walk through the planned actions and build up a table | |
9578 | of move, copy and fill records. Use the move, copy and | |
9579 | fill records to perform the actions once. */ | |
9580 | ||
43cd72b9 BW |
9581 | bfd_size_type final_size, copy_size, orig_insn_size; |
9582 | bfd_byte *scratch = NULL; | |
9583 | bfd_byte *dup_contents = NULL; | |
a3ef2d63 | 9584 | bfd_size_type orig_size = sec->size; |
43cd72b9 BW |
9585 | bfd_vma orig_dot = 0; |
9586 | bfd_vma orig_dot_copied = 0; /* Byte copied already from | |
9587 | orig dot in physical memory. */ | |
9588 | bfd_vma orig_dot_vo = 0; /* Virtual offset from orig_dot. */ | |
9589 | bfd_vma dup_dot = 0; | |
9590 | ||
4c2af04f | 9591 | text_action *action; |
43cd72b9 BW |
9592 | |
9593 | final_size = sec->size; | |
43cd72b9 | 9594 | |
4c2af04f MF |
9595 | splay_tree_foreach (relax_info->action_list.tree, |
9596 | action_remove_bytes_fn, &final_size); | |
43cd72b9 BW |
9597 | scratch = (bfd_byte *) bfd_zmalloc (final_size); |
9598 | dup_contents = (bfd_byte *) bfd_zmalloc (final_size); | |
9599 | ||
9600 | /* The dot is the current fill location. */ | |
9601 | #if DEBUG | |
9602 | print_action_list (stderr, &relax_info->action_list); | |
9603 | #endif | |
9604 | ||
4c2af04f MF |
9605 | for (action = action_first (&relax_info->action_list); action; |
9606 | action = action_next (&relax_info->action_list, action)) | |
43cd72b9 BW |
9607 | { |
9608 | virtual_action = FALSE; | |
9609 | if (action->offset > orig_dot) | |
9610 | { | |
9611 | orig_dot += orig_dot_copied; | |
9612 | orig_dot_copied = 0; | |
9613 | orig_dot_vo = 0; | |
9614 | /* Out of the virtual world. */ | |
9615 | } | |
9616 | ||
9617 | if (action->offset > orig_dot) | |
9618 | { | |
9619 | copy_size = action->offset - orig_dot; | |
9620 | memmove (&dup_contents[dup_dot], &contents[orig_dot], copy_size); | |
9621 | orig_dot += copy_size; | |
9622 | dup_dot += copy_size; | |
9623 | BFD_ASSERT (action->offset == orig_dot); | |
9624 | } | |
9625 | else if (action->offset < orig_dot) | |
9626 | { | |
9627 | if (action->action == ta_fill | |
9628 | && action->offset - action->removed_bytes == orig_dot) | |
9629 | { | |
9630 | /* This is OK because the fill only effects the dup_dot. */ | |
9631 | } | |
9632 | else if (action->action == ta_add_literal) | |
9633 | { | |
9634 | /* TBD. Might need to handle this. */ | |
9635 | } | |
9636 | } | |
9637 | if (action->offset == orig_dot) | |
9638 | { | |
9639 | if (action->virtual_offset > orig_dot_vo) | |
9640 | { | |
9641 | if (orig_dot_vo == 0) | |
9642 | { | |
9643 | /* Need to copy virtual_offset bytes. Probably four. */ | |
9644 | copy_size = action->virtual_offset - orig_dot_vo; | |
9645 | memmove (&dup_contents[dup_dot], | |
9646 | &contents[orig_dot], copy_size); | |
9647 | orig_dot_copied = copy_size; | |
9648 | dup_dot += copy_size; | |
9649 | } | |
9650 | virtual_action = TRUE; | |
68ffbac6 | 9651 | } |
43cd72b9 BW |
9652 | else |
9653 | BFD_ASSERT (action->virtual_offset <= orig_dot_vo); | |
9654 | } | |
9655 | switch (action->action) | |
9656 | { | |
9657 | case ta_remove_literal: | |
9658 | case ta_remove_insn: | |
9659 | BFD_ASSERT (action->removed_bytes >= 0); | |
9660 | orig_dot += action->removed_bytes; | |
9661 | break; | |
9662 | ||
9663 | case ta_narrow_insn: | |
9664 | orig_insn_size = 3; | |
9665 | copy_size = 2; | |
9666 | memmove (scratch, &contents[orig_dot], orig_insn_size); | |
9667 | BFD_ASSERT (action->removed_bytes == 1); | |
64b607e6 | 9668 | rv = narrow_instruction (scratch, final_size, 0); |
43cd72b9 BW |
9669 | BFD_ASSERT (rv); |
9670 | memmove (&dup_contents[dup_dot], scratch, copy_size); | |
9671 | orig_dot += orig_insn_size; | |
9672 | dup_dot += copy_size; | |
9673 | break; | |
9674 | ||
9675 | case ta_fill: | |
9676 | if (action->removed_bytes >= 0) | |
9677 | orig_dot += action->removed_bytes; | |
9678 | else | |
9679 | { | |
9680 | /* Already zeroed in dup_contents. Just bump the | |
9681 | counters. */ | |
9682 | dup_dot += (-action->removed_bytes); | |
9683 | } | |
9684 | break; | |
9685 | ||
9686 | case ta_none: | |
9687 | BFD_ASSERT (action->removed_bytes == 0); | |
9688 | break; | |
9689 | ||
9690 | case ta_convert_longcall: | |
9691 | case ta_remove_longcall: | |
9692 | /* These will be removed or converted before we get here. */ | |
9693 | BFD_ASSERT (0); | |
9694 | break; | |
9695 | ||
9696 | case ta_widen_insn: | |
9697 | orig_insn_size = 2; | |
9698 | copy_size = 3; | |
9699 | memmove (scratch, &contents[orig_dot], orig_insn_size); | |
9700 | BFD_ASSERT (action->removed_bytes == -1); | |
64b607e6 | 9701 | rv = widen_instruction (scratch, final_size, 0); |
43cd72b9 BW |
9702 | BFD_ASSERT (rv); |
9703 | memmove (&dup_contents[dup_dot], scratch, copy_size); | |
9704 | orig_dot += orig_insn_size; | |
9705 | dup_dot += copy_size; | |
9706 | break; | |
9707 | ||
9708 | case ta_add_literal: | |
9709 | orig_insn_size = 0; | |
9710 | copy_size = 4; | |
9711 | BFD_ASSERT (action->removed_bytes == -4); | |
9712 | /* TBD -- place the literal value here and insert | |
9713 | into the table. */ | |
9714 | memset (&dup_contents[dup_dot], 0, 4); | |
9715 | pin_internal_relocs (sec, internal_relocs); | |
9716 | pin_contents (sec, contents); | |
9717 | ||
9718 | if (!move_literal (abfd, link_info, sec, dup_dot, dup_contents, | |
9719 | relax_info, &internal_relocs, &action->value)) | |
9720 | goto error_return; | |
9721 | ||
68ffbac6 | 9722 | if (virtual_action) |
43cd72b9 BW |
9723 | orig_dot_vo += copy_size; |
9724 | ||
9725 | orig_dot += orig_insn_size; | |
9726 | dup_dot += copy_size; | |
9727 | break; | |
9728 | ||
9729 | default: | |
9730 | /* Not implemented yet. */ | |
9731 | BFD_ASSERT (0); | |
9732 | break; | |
9733 | } | |
9734 | ||
43cd72b9 BW |
9735 | BFD_ASSERT (dup_dot <= final_size); |
9736 | BFD_ASSERT (orig_dot <= orig_size); | |
9737 | } | |
9738 | ||
9739 | orig_dot += orig_dot_copied; | |
9740 | orig_dot_copied = 0; | |
9741 | ||
9742 | if (orig_dot != orig_size) | |
9743 | { | |
9744 | copy_size = orig_size - orig_dot; | |
9745 | BFD_ASSERT (orig_size > orig_dot); | |
9746 | BFD_ASSERT (dup_dot + copy_size == final_size); | |
9747 | memmove (&dup_contents[dup_dot], &contents[orig_dot], copy_size); | |
9748 | orig_dot += copy_size; | |
9749 | dup_dot += copy_size; | |
9750 | } | |
9751 | BFD_ASSERT (orig_size == orig_dot); | |
9752 | BFD_ASSERT (final_size == dup_dot); | |
9753 | ||
9754 | /* Move the dup_contents back. */ | |
9755 | if (final_size > orig_size) | |
9756 | { | |
9757 | /* Contents need to be reallocated. Swap the dup_contents into | |
9758 | contents. */ | |
9759 | sec->contents = dup_contents; | |
9760 | free (contents); | |
9761 | contents = dup_contents; | |
9762 | pin_contents (sec, contents); | |
9763 | } | |
9764 | else | |
9765 | { | |
9766 | BFD_ASSERT (final_size <= orig_size); | |
9767 | memset (contents, 0, orig_size); | |
9768 | memcpy (contents, dup_contents, final_size); | |
9769 | free (dup_contents); | |
9770 | } | |
9771 | free (scratch); | |
9772 | pin_contents (sec, contents); | |
9773 | ||
a3ef2d63 BW |
9774 | if (sec->rawsize == 0) |
9775 | sec->rawsize = sec->size; | |
43cd72b9 BW |
9776 | sec->size = final_size; |
9777 | } | |
9778 | ||
9779 | error_return: | |
9780 | release_internal_relocs (sec, internal_relocs); | |
9781 | release_contents (sec, contents); | |
9782 | return ok; | |
9783 | } | |
9784 | ||
9785 | ||
68ffbac6 | 9786 | static bfd_boolean |
7fa3d080 | 9787 | translate_section_fixes (asection *sec) |
43cd72b9 BW |
9788 | { |
9789 | xtensa_relax_info *relax_info; | |
9790 | reloc_bfd_fix *r; | |
9791 | ||
9792 | relax_info = get_xtensa_relax_info (sec); | |
9793 | if (!relax_info) | |
9794 | return TRUE; | |
9795 | ||
9796 | for (r = relax_info->fix_list; r != NULL; r = r->next) | |
9797 | if (!translate_reloc_bfd_fix (r)) | |
9798 | return FALSE; | |
e0001a05 | 9799 | |
43cd72b9 BW |
9800 | return TRUE; |
9801 | } | |
e0001a05 | 9802 | |
e0001a05 | 9803 | |
43cd72b9 BW |
9804 | /* Translate a fix given the mapping in the relax info for the target |
9805 | section. If it has already been translated, no work is required. */ | |
e0001a05 | 9806 | |
68ffbac6 | 9807 | static bfd_boolean |
7fa3d080 | 9808 | translate_reloc_bfd_fix (reloc_bfd_fix *fix) |
43cd72b9 BW |
9809 | { |
9810 | reloc_bfd_fix new_fix; | |
9811 | asection *sec; | |
9812 | xtensa_relax_info *relax_info; | |
9813 | removed_literal *removed; | |
9814 | bfd_vma new_offset, target_offset; | |
e0001a05 | 9815 | |
43cd72b9 BW |
9816 | if (fix->translated) |
9817 | return TRUE; | |
e0001a05 | 9818 | |
43cd72b9 BW |
9819 | sec = fix->target_sec; |
9820 | target_offset = fix->target_offset; | |
e0001a05 | 9821 | |
43cd72b9 BW |
9822 | relax_info = get_xtensa_relax_info (sec); |
9823 | if (!relax_info) | |
9824 | { | |
9825 | fix->translated = TRUE; | |
9826 | return TRUE; | |
9827 | } | |
e0001a05 | 9828 | |
43cd72b9 | 9829 | new_fix = *fix; |
e0001a05 | 9830 | |
43cd72b9 BW |
9831 | /* The fix does not need to be translated if the section cannot change. */ |
9832 | if (!relax_info->is_relaxable_literal_section | |
9833 | && !relax_info->is_relaxable_asm_section) | |
9834 | { | |
9835 | fix->translated = TRUE; | |
9836 | return TRUE; | |
9837 | } | |
e0001a05 | 9838 | |
43cd72b9 BW |
9839 | /* If the literal has been moved and this relocation was on an |
9840 | opcode, then the relocation should move to the new literal | |
9841 | location. Otherwise, the relocation should move within the | |
9842 | section. */ | |
9843 | ||
9844 | removed = FALSE; | |
9845 | if (is_operand_relocation (fix->src_type)) | |
9846 | { | |
9847 | /* Check if the original relocation is against a literal being | |
9848 | removed. */ | |
9849 | removed = find_removed_literal (&relax_info->removed_list, | |
9850 | target_offset); | |
e0001a05 NC |
9851 | } |
9852 | ||
68ffbac6 | 9853 | if (removed) |
e0001a05 | 9854 | { |
43cd72b9 | 9855 | asection *new_sec; |
e0001a05 | 9856 | |
43cd72b9 BW |
9857 | /* The fact that there is still a relocation to this literal indicates |
9858 | that the literal is being coalesced, not simply removed. */ | |
9859 | BFD_ASSERT (removed->to.abfd != NULL); | |
e0001a05 | 9860 | |
43cd72b9 BW |
9861 | /* This was moved to some other address (possibly another section). */ |
9862 | new_sec = r_reloc_get_section (&removed->to); | |
68ffbac6 | 9863 | if (new_sec != sec) |
e0001a05 | 9864 | { |
43cd72b9 BW |
9865 | sec = new_sec; |
9866 | relax_info = get_xtensa_relax_info (sec); | |
68ffbac6 | 9867 | if (!relax_info || |
43cd72b9 BW |
9868 | (!relax_info->is_relaxable_literal_section |
9869 | && !relax_info->is_relaxable_asm_section)) | |
e0001a05 | 9870 | { |
43cd72b9 BW |
9871 | target_offset = removed->to.target_offset; |
9872 | new_fix.target_sec = new_sec; | |
9873 | new_fix.target_offset = target_offset; | |
9874 | new_fix.translated = TRUE; | |
9875 | *fix = new_fix; | |
9876 | return TRUE; | |
e0001a05 | 9877 | } |
e0001a05 | 9878 | } |
43cd72b9 BW |
9879 | target_offset = removed->to.target_offset; |
9880 | new_fix.target_sec = new_sec; | |
e0001a05 | 9881 | } |
43cd72b9 BW |
9882 | |
9883 | /* The target address may have been moved within its section. */ | |
9884 | new_offset = offset_with_removed_text (&relax_info->action_list, | |
9885 | target_offset); | |
9886 | ||
9887 | new_fix.target_offset = new_offset; | |
9888 | new_fix.target_offset = new_offset; | |
9889 | new_fix.translated = TRUE; | |
9890 | *fix = new_fix; | |
9891 | return TRUE; | |
e0001a05 NC |
9892 | } |
9893 | ||
9894 | ||
9895 | /* Fix up a relocation to take account of removed literals. */ | |
9896 | ||
9b7f5d20 BW |
9897 | static asection * |
9898 | translate_reloc (const r_reloc *orig_rel, r_reloc *new_rel, asection *sec) | |
e0001a05 | 9899 | { |
e0001a05 NC |
9900 | xtensa_relax_info *relax_info; |
9901 | removed_literal *removed; | |
9b7f5d20 | 9902 | bfd_vma target_offset, base_offset; |
e0001a05 NC |
9903 | |
9904 | *new_rel = *orig_rel; | |
9905 | ||
9906 | if (!r_reloc_is_defined (orig_rel)) | |
9b7f5d20 | 9907 | return sec ; |
e0001a05 NC |
9908 | |
9909 | relax_info = get_xtensa_relax_info (sec); | |
9b7f5d20 BW |
9910 | BFD_ASSERT (relax_info && (relax_info->is_relaxable_literal_section |
9911 | || relax_info->is_relaxable_asm_section)); | |
e0001a05 | 9912 | |
43cd72b9 BW |
9913 | target_offset = orig_rel->target_offset; |
9914 | ||
9915 | removed = FALSE; | |
9916 | if (is_operand_relocation (ELF32_R_TYPE (orig_rel->rela.r_info))) | |
9917 | { | |
9918 | /* Check if the original relocation is against a literal being | |
9919 | removed. */ | |
9920 | removed = find_removed_literal (&relax_info->removed_list, | |
9921 | target_offset); | |
9922 | } | |
9923 | if (removed && removed->to.abfd) | |
e0001a05 NC |
9924 | { |
9925 | asection *new_sec; | |
9926 | ||
9927 | /* The fact that there is still a relocation to this literal indicates | |
9928 | that the literal is being coalesced, not simply removed. */ | |
9929 | BFD_ASSERT (removed->to.abfd != NULL); | |
9930 | ||
43cd72b9 BW |
9931 | /* This was moved to some other address |
9932 | (possibly in another section). */ | |
e0001a05 NC |
9933 | *new_rel = removed->to; |
9934 | new_sec = r_reloc_get_section (new_rel); | |
43cd72b9 | 9935 | if (new_sec != sec) |
e0001a05 NC |
9936 | { |
9937 | sec = new_sec; | |
9938 | relax_info = get_xtensa_relax_info (sec); | |
43cd72b9 BW |
9939 | if (!relax_info |
9940 | || (!relax_info->is_relaxable_literal_section | |
9941 | && !relax_info->is_relaxable_asm_section)) | |
9b7f5d20 | 9942 | return sec; |
e0001a05 | 9943 | } |
43cd72b9 | 9944 | target_offset = new_rel->target_offset; |
e0001a05 NC |
9945 | } |
9946 | ||
9b7f5d20 BW |
9947 | /* Find the base offset of the reloc symbol, excluding any addend from the |
9948 | reloc or from the section contents (for a partial_inplace reloc). Then | |
9949 | find the adjusted values of the offsets due to relaxation. The base | |
9950 | offset is needed to determine the change to the reloc's addend; the reloc | |
9951 | addend should not be adjusted due to relaxations located before the base | |
9952 | offset. */ | |
9953 | ||
9954 | base_offset = r_reloc_get_target_offset (new_rel) - new_rel->rela.r_addend; | |
9b7f5d20 BW |
9955 | if (base_offset <= target_offset) |
9956 | { | |
071aa5c9 MF |
9957 | int base_removed = removed_by_actions_map (&relax_info->action_list, |
9958 | base_offset, FALSE); | |
9959 | int addend_removed = removed_by_actions_map (&relax_info->action_list, | |
9960 | target_offset, FALSE) - | |
9961 | base_removed; | |
9962 | ||
9b7f5d20 BW |
9963 | new_rel->target_offset = target_offset - base_removed - addend_removed; |
9964 | new_rel->rela.r_addend -= addend_removed; | |
9965 | } | |
9966 | else | |
9967 | { | |
9968 | /* Handle a negative addend. The base offset comes first. */ | |
071aa5c9 MF |
9969 | int tgt_removed = removed_by_actions_map (&relax_info->action_list, |
9970 | target_offset, FALSE); | |
9971 | int addend_removed = removed_by_actions_map (&relax_info->action_list, | |
9972 | base_offset, FALSE) - | |
9973 | tgt_removed; | |
9974 | ||
9b7f5d20 BW |
9975 | new_rel->target_offset = target_offset - tgt_removed; |
9976 | new_rel->rela.r_addend += addend_removed; | |
9977 | } | |
e0001a05 | 9978 | |
9b7f5d20 | 9979 | return sec; |
e0001a05 NC |
9980 | } |
9981 | ||
9982 | ||
9983 | /* For dynamic links, there may be a dynamic relocation for each | |
9984 | literal. The number of dynamic relocations must be computed in | |
9985 | size_dynamic_sections, which occurs before relaxation. When a | |
9986 | literal is removed, this function checks if there is a corresponding | |
9987 | dynamic relocation and shrinks the size of the appropriate dynamic | |
9988 | relocation section accordingly. At this point, the contents of the | |
9989 | dynamic relocation sections have not yet been filled in, so there's | |
9990 | nothing else that needs to be done. */ | |
9991 | ||
9992 | static void | |
7fa3d080 BW |
9993 | shrink_dynamic_reloc_sections (struct bfd_link_info *info, |
9994 | bfd *abfd, | |
9995 | asection *input_section, | |
9996 | Elf_Internal_Rela *rel) | |
e0001a05 | 9997 | { |
f0e6fdb2 | 9998 | struct elf_xtensa_link_hash_table *htab; |
e0001a05 NC |
9999 | Elf_Internal_Shdr *symtab_hdr; |
10000 | struct elf_link_hash_entry **sym_hashes; | |
10001 | unsigned long r_symndx; | |
10002 | int r_type; | |
10003 | struct elf_link_hash_entry *h; | |
10004 | bfd_boolean dynamic_symbol; | |
10005 | ||
f0e6fdb2 | 10006 | htab = elf_xtensa_hash_table (info); |
4dfe6ac6 NC |
10007 | if (htab == NULL) |
10008 | return; | |
10009 | ||
e0001a05 NC |
10010 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
10011 | sym_hashes = elf_sym_hashes (abfd); | |
10012 | ||
10013 | r_type = ELF32_R_TYPE (rel->r_info); | |
10014 | r_symndx = ELF32_R_SYM (rel->r_info); | |
10015 | ||
10016 | if (r_symndx < symtab_hdr->sh_info) | |
10017 | h = NULL; | |
10018 | else | |
10019 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
10020 | ||
4608f3d9 | 10021 | dynamic_symbol = elf_xtensa_dynamic_symbol_p (h, info); |
e0001a05 NC |
10022 | |
10023 | if ((r_type == R_XTENSA_32 || r_type == R_XTENSA_PLT) | |
10024 | && (input_section->flags & SEC_ALLOC) != 0 | |
c451bb34 | 10025 | && (dynamic_symbol || bfd_link_pic (info)) |
5d3a462f MF |
10026 | && (!h || h->root.type != bfd_link_hash_undefweak |
10027 | || (dynamic_symbol && bfd_link_dll (info)))) | |
e0001a05 | 10028 | { |
e0001a05 NC |
10029 | asection *srel; |
10030 | bfd_boolean is_plt = FALSE; | |
10031 | ||
e0001a05 NC |
10032 | if (dynamic_symbol && r_type == R_XTENSA_PLT) |
10033 | { | |
ce558b89 | 10034 | srel = htab->elf.srelplt; |
e0001a05 NC |
10035 | is_plt = TRUE; |
10036 | } | |
10037 | else | |
ce558b89 | 10038 | srel = htab->elf.srelgot; |
e0001a05 NC |
10039 | |
10040 | /* Reduce size of the .rela.* section by one reloc. */ | |
e0001a05 | 10041 | BFD_ASSERT (srel != NULL); |
eea6121a AM |
10042 | BFD_ASSERT (srel->size >= sizeof (Elf32_External_Rela)); |
10043 | srel->size -= sizeof (Elf32_External_Rela); | |
e0001a05 NC |
10044 | |
10045 | if (is_plt) | |
10046 | { | |
10047 | asection *splt, *sgotplt, *srelgot; | |
10048 | int reloc_index, chunk; | |
10049 | ||
10050 | /* Find the PLT reloc index of the entry being removed. This | |
10051 | is computed from the size of ".rela.plt". It is needed to | |
10052 | figure out which PLT chunk to resize. Usually "last index | |
10053 | = size - 1" since the index starts at zero, but in this | |
10054 | context, the size has just been decremented so there's no | |
10055 | need to subtract one. */ | |
eea6121a | 10056 | reloc_index = srel->size / sizeof (Elf32_External_Rela); |
e0001a05 NC |
10057 | |
10058 | chunk = reloc_index / PLT_ENTRIES_PER_CHUNK; | |
f0e6fdb2 BW |
10059 | splt = elf_xtensa_get_plt_section (info, chunk); |
10060 | sgotplt = elf_xtensa_get_gotplt_section (info, chunk); | |
e0001a05 NC |
10061 | BFD_ASSERT (splt != NULL && sgotplt != NULL); |
10062 | ||
10063 | /* Check if an entire PLT chunk has just been eliminated. */ | |
10064 | if (reloc_index % PLT_ENTRIES_PER_CHUNK == 0) | |
10065 | { | |
10066 | /* The two magic GOT entries for that chunk can go away. */ | |
ce558b89 | 10067 | srelgot = htab->elf.srelgot; |
e0001a05 NC |
10068 | BFD_ASSERT (srelgot != NULL); |
10069 | srelgot->reloc_count -= 2; | |
eea6121a AM |
10070 | srelgot->size -= 2 * sizeof (Elf32_External_Rela); |
10071 | sgotplt->size -= 8; | |
e0001a05 NC |
10072 | |
10073 | /* There should be only one entry left (and it will be | |
10074 | removed below). */ | |
eea6121a AM |
10075 | BFD_ASSERT (sgotplt->size == 4); |
10076 | BFD_ASSERT (splt->size == PLT_ENTRY_SIZE); | |
e0001a05 NC |
10077 | } |
10078 | ||
eea6121a AM |
10079 | BFD_ASSERT (sgotplt->size >= 4); |
10080 | BFD_ASSERT (splt->size >= PLT_ENTRY_SIZE); | |
e0001a05 | 10081 | |
eea6121a AM |
10082 | sgotplt->size -= 4; |
10083 | splt->size -= PLT_ENTRY_SIZE; | |
e0001a05 NC |
10084 | } |
10085 | } | |
10086 | } | |
10087 | ||
10088 | ||
43cd72b9 BW |
10089 | /* Take an r_rel and move it to another section. This usually |
10090 | requires extending the interal_relocation array and pinning it. If | |
10091 | the original r_rel is from the same BFD, we can complete this here. | |
10092 | Otherwise, we add a fix record to let the final link fix the | |
10093 | appropriate address. Contents and internal relocations for the | |
10094 | section must be pinned after calling this routine. */ | |
10095 | ||
10096 | static bfd_boolean | |
7fa3d080 BW |
10097 | move_literal (bfd *abfd, |
10098 | struct bfd_link_info *link_info, | |
10099 | asection *sec, | |
10100 | bfd_vma offset, | |
10101 | bfd_byte *contents, | |
10102 | xtensa_relax_info *relax_info, | |
10103 | Elf_Internal_Rela **internal_relocs_p, | |
10104 | const literal_value *lit) | |
43cd72b9 BW |
10105 | { |
10106 | Elf_Internal_Rela *new_relocs = NULL; | |
10107 | size_t new_relocs_count = 0; | |
10108 | Elf_Internal_Rela this_rela; | |
10109 | const r_reloc *r_rel; | |
10110 | ||
10111 | r_rel = &lit->r_rel; | |
10112 | BFD_ASSERT (elf_section_data (sec)->relocs == *internal_relocs_p); | |
10113 | ||
10114 | if (r_reloc_is_const (r_rel)) | |
10115 | bfd_put_32 (abfd, lit->value, contents + offset); | |
10116 | else | |
10117 | { | |
10118 | int r_type; | |
10119 | unsigned i; | |
43cd72b9 BW |
10120 | reloc_bfd_fix *fix; |
10121 | unsigned insert_at; | |
10122 | ||
10123 | r_type = ELF32_R_TYPE (r_rel->rela.r_info); | |
43cd72b9 BW |
10124 | |
10125 | /* This is the difficult case. We have to create a fix up. */ | |
10126 | this_rela.r_offset = offset; | |
10127 | this_rela.r_info = ELF32_R_INFO (0, r_type); | |
10128 | this_rela.r_addend = | |
10129 | r_rel->target_offset - r_reloc_get_target_offset (r_rel); | |
10130 | bfd_put_32 (abfd, lit->value, contents + offset); | |
10131 | ||
10132 | /* Currently, we cannot move relocations during a relocatable link. */ | |
0e1862bb | 10133 | BFD_ASSERT (!bfd_link_relocatable (link_info)); |
0f5f1638 | 10134 | fix = reloc_bfd_fix_init (sec, offset, r_type, |
43cd72b9 BW |
10135 | r_reloc_get_section (r_rel), |
10136 | r_rel->target_offset + r_rel->virtual_offset, | |
10137 | FALSE); | |
10138 | /* We also need to mark that relocations are needed here. */ | |
10139 | sec->flags |= SEC_RELOC; | |
10140 | ||
10141 | translate_reloc_bfd_fix (fix); | |
10142 | /* This fix has not yet been translated. */ | |
10143 | add_fix (sec, fix); | |
10144 | ||
10145 | /* Add the relocation. If we have already allocated our own | |
10146 | space for the relocations and we have room for more, then use | |
10147 | it. Otherwise, allocate new space and move the literals. */ | |
10148 | insert_at = sec->reloc_count; | |
10149 | for (i = 0; i < sec->reloc_count; ++i) | |
10150 | { | |
10151 | if (this_rela.r_offset < (*internal_relocs_p)[i].r_offset) | |
10152 | { | |
10153 | insert_at = i; | |
10154 | break; | |
10155 | } | |
10156 | } | |
10157 | ||
10158 | if (*internal_relocs_p != relax_info->allocated_relocs | |
10159 | || sec->reloc_count + 1 > relax_info->allocated_relocs_count) | |
10160 | { | |
10161 | BFD_ASSERT (relax_info->allocated_relocs == NULL | |
10162 | || sec->reloc_count == relax_info->relocs_count); | |
10163 | ||
68ffbac6 | 10164 | if (relax_info->allocated_relocs_count == 0) |
43cd72b9 BW |
10165 | new_relocs_count = (sec->reloc_count + 2) * 2; |
10166 | else | |
10167 | new_relocs_count = (relax_info->allocated_relocs_count + 2) * 2; | |
10168 | ||
10169 | new_relocs = (Elf_Internal_Rela *) | |
10170 | bfd_zmalloc (sizeof (Elf_Internal_Rela) * (new_relocs_count)); | |
10171 | if (!new_relocs) | |
10172 | return FALSE; | |
10173 | ||
10174 | /* We could handle this more quickly by finding the split point. */ | |
10175 | if (insert_at != 0) | |
10176 | memcpy (new_relocs, *internal_relocs_p, | |
10177 | insert_at * sizeof (Elf_Internal_Rela)); | |
10178 | ||
10179 | new_relocs[insert_at] = this_rela; | |
10180 | ||
10181 | if (insert_at != sec->reloc_count) | |
10182 | memcpy (new_relocs + insert_at + 1, | |
10183 | (*internal_relocs_p) + insert_at, | |
68ffbac6 | 10184 | (sec->reloc_count - insert_at) |
43cd72b9 BW |
10185 | * sizeof (Elf_Internal_Rela)); |
10186 | ||
10187 | if (*internal_relocs_p != relax_info->allocated_relocs) | |
10188 | { | |
10189 | /* The first time we re-allocate, we can only free the | |
10190 | old relocs if they were allocated with bfd_malloc. | |
10191 | This is not true when keep_memory is in effect. */ | |
10192 | if (!link_info->keep_memory) | |
10193 | free (*internal_relocs_p); | |
10194 | } | |
10195 | else | |
10196 | free (*internal_relocs_p); | |
10197 | relax_info->allocated_relocs = new_relocs; | |
10198 | relax_info->allocated_relocs_count = new_relocs_count; | |
10199 | elf_section_data (sec)->relocs = new_relocs; | |
10200 | sec->reloc_count++; | |
10201 | relax_info->relocs_count = sec->reloc_count; | |
10202 | *internal_relocs_p = new_relocs; | |
10203 | } | |
10204 | else | |
10205 | { | |
10206 | if (insert_at != sec->reloc_count) | |
10207 | { | |
10208 | unsigned idx; | |
10209 | for (idx = sec->reloc_count; idx > insert_at; idx--) | |
10210 | (*internal_relocs_p)[idx] = (*internal_relocs_p)[idx-1]; | |
10211 | } | |
10212 | (*internal_relocs_p)[insert_at] = this_rela; | |
10213 | sec->reloc_count++; | |
10214 | if (relax_info->allocated_relocs) | |
10215 | relax_info->relocs_count = sec->reloc_count; | |
10216 | } | |
10217 | } | |
10218 | return TRUE; | |
10219 | } | |
10220 | ||
10221 | ||
e0001a05 NC |
10222 | /* This is similar to relax_section except that when a target is moved, |
10223 | we shift addresses up. We also need to modify the size. This | |
10224 | algorithm does NOT allow for relocations into the middle of the | |
10225 | property sections. */ | |
10226 | ||
43cd72b9 | 10227 | static bfd_boolean |
7fa3d080 BW |
10228 | relax_property_section (bfd *abfd, |
10229 | asection *sec, | |
10230 | struct bfd_link_info *link_info) | |
e0001a05 NC |
10231 | { |
10232 | Elf_Internal_Rela *internal_relocs; | |
10233 | bfd_byte *contents; | |
1d25768e | 10234 | unsigned i; |
e0001a05 | 10235 | bfd_boolean ok = TRUE; |
43cd72b9 BW |
10236 | bfd_boolean is_full_prop_section; |
10237 | size_t last_zfill_target_offset = 0; | |
10238 | asection *last_zfill_target_sec = NULL; | |
10239 | bfd_size_type sec_size; | |
1d25768e | 10240 | bfd_size_type entry_size; |
e0001a05 | 10241 | |
43cd72b9 | 10242 | sec_size = bfd_get_section_limit (abfd, sec); |
68ffbac6 | 10243 | internal_relocs = retrieve_internal_relocs (abfd, sec, |
e0001a05 NC |
10244 | link_info->keep_memory); |
10245 | contents = retrieve_contents (abfd, sec, link_info->keep_memory); | |
43cd72b9 | 10246 | if (contents == NULL && sec_size != 0) |
e0001a05 NC |
10247 | { |
10248 | ok = FALSE; | |
10249 | goto error_return; | |
10250 | } | |
10251 | ||
1d25768e BW |
10252 | is_full_prop_section = xtensa_is_proptable_section (sec); |
10253 | if (is_full_prop_section) | |
10254 | entry_size = 12; | |
10255 | else | |
10256 | entry_size = 8; | |
43cd72b9 BW |
10257 | |
10258 | if (internal_relocs) | |
e0001a05 | 10259 | { |
43cd72b9 | 10260 | for (i = 0; i < sec->reloc_count; i++) |
e0001a05 NC |
10261 | { |
10262 | Elf_Internal_Rela *irel; | |
10263 | xtensa_relax_info *target_relax_info; | |
e0001a05 NC |
10264 | unsigned r_type; |
10265 | asection *target_sec; | |
43cd72b9 BW |
10266 | literal_value val; |
10267 | bfd_byte *size_p, *flags_p; | |
e0001a05 NC |
10268 | |
10269 | /* Locally change the source address. | |
10270 | Translate the target to the new target address. | |
10271 | If it points to this section and has been removed, MOVE IT. | |
10272 | Also, don't forget to modify the associated SIZE at | |
10273 | (offset + 4). */ | |
10274 | ||
10275 | irel = &internal_relocs[i]; | |
10276 | r_type = ELF32_R_TYPE (irel->r_info); | |
10277 | if (r_type == R_XTENSA_NONE) | |
10278 | continue; | |
10279 | ||
43cd72b9 BW |
10280 | /* Find the literal value. */ |
10281 | r_reloc_init (&val.r_rel, abfd, irel, contents, sec_size); | |
10282 | size_p = &contents[irel->r_offset + 4]; | |
10283 | flags_p = NULL; | |
10284 | if (is_full_prop_section) | |
1d25768e BW |
10285 | flags_p = &contents[irel->r_offset + 8]; |
10286 | BFD_ASSERT (irel->r_offset + entry_size <= sec_size); | |
e0001a05 | 10287 | |
43cd72b9 | 10288 | target_sec = r_reloc_get_section (&val.r_rel); |
e0001a05 NC |
10289 | target_relax_info = get_xtensa_relax_info (target_sec); |
10290 | ||
10291 | if (target_relax_info | |
43cd72b9 BW |
10292 | && (target_relax_info->is_relaxable_literal_section |
10293 | || target_relax_info->is_relaxable_asm_section )) | |
e0001a05 NC |
10294 | { |
10295 | /* Translate the relocation's destination. */ | |
03669f1c BW |
10296 | bfd_vma old_offset = val.r_rel.target_offset; |
10297 | bfd_vma new_offset; | |
e0001a05 | 10298 | long old_size, new_size; |
071aa5c9 MF |
10299 | int removed_by_old_offset = |
10300 | removed_by_actions_map (&target_relax_info->action_list, | |
10301 | old_offset, FALSE); | |
10302 | new_offset = old_offset - removed_by_old_offset; | |
e0001a05 NC |
10303 | |
10304 | /* Assert that we are not out of bounds. */ | |
43cd72b9 | 10305 | old_size = bfd_get_32 (abfd, size_p); |
03669f1c | 10306 | new_size = old_size; |
43cd72b9 BW |
10307 | |
10308 | if (old_size == 0) | |
10309 | { | |
10310 | /* Only the first zero-sized unreachable entry is | |
10311 | allowed to expand. In this case the new offset | |
10312 | should be the offset before the fill and the new | |
10313 | size is the expansion size. For other zero-sized | |
10314 | entries the resulting size should be zero with an | |
10315 | offset before or after the fill address depending | |
10316 | on whether the expanding unreachable entry | |
10317 | preceeds it. */ | |
03669f1c BW |
10318 | if (last_zfill_target_sec == 0 |
10319 | || last_zfill_target_sec != target_sec | |
10320 | || last_zfill_target_offset != old_offset) | |
43cd72b9 | 10321 | { |
03669f1c BW |
10322 | bfd_vma new_end_offset = new_offset; |
10323 | ||
10324 | /* Recompute the new_offset, but this time don't | |
10325 | include any fill inserted by relaxation. */ | |
071aa5c9 MF |
10326 | removed_by_old_offset = |
10327 | removed_by_actions_map (&target_relax_info->action_list, | |
10328 | old_offset, TRUE); | |
10329 | new_offset = old_offset - removed_by_old_offset; | |
43cd72b9 BW |
10330 | |
10331 | /* If it is not unreachable and we have not yet | |
10332 | seen an unreachable at this address, place it | |
10333 | before the fill address. */ | |
03669f1c BW |
10334 | if (flags_p && (bfd_get_32 (abfd, flags_p) |
10335 | & XTENSA_PROP_UNREACHABLE) != 0) | |
43cd72b9 | 10336 | { |
03669f1c BW |
10337 | new_size = new_end_offset - new_offset; |
10338 | ||
43cd72b9 | 10339 | last_zfill_target_sec = target_sec; |
03669f1c | 10340 | last_zfill_target_offset = old_offset; |
43cd72b9 BW |
10341 | } |
10342 | } | |
10343 | } | |
10344 | else | |
071aa5c9 MF |
10345 | { |
10346 | int removed_by_old_offset_size = | |
10347 | removed_by_actions_map (&target_relax_info->action_list, | |
10348 | old_offset + old_size, TRUE); | |
10349 | new_size -= removed_by_old_offset_size - removed_by_old_offset; | |
10350 | } | |
43cd72b9 | 10351 | |
e0001a05 NC |
10352 | if (new_size != old_size) |
10353 | { | |
10354 | bfd_put_32 (abfd, new_size, size_p); | |
10355 | pin_contents (sec, contents); | |
10356 | } | |
43cd72b9 | 10357 | |
03669f1c | 10358 | if (new_offset != old_offset) |
e0001a05 | 10359 | { |
03669f1c | 10360 | bfd_vma diff = new_offset - old_offset; |
e0001a05 NC |
10361 | irel->r_addend += diff; |
10362 | pin_internal_relocs (sec, internal_relocs); | |
10363 | } | |
10364 | } | |
10365 | } | |
10366 | } | |
10367 | ||
10368 | /* Combine adjacent property table entries. This is also done in | |
10369 | finish_dynamic_sections() but at that point it's too late to | |
10370 | reclaim the space in the output section, so we do this twice. */ | |
10371 | ||
0e1862bb | 10372 | if (internal_relocs && (!bfd_link_relocatable (link_info) |
1d25768e | 10373 | || xtensa_is_littable_section (sec))) |
e0001a05 NC |
10374 | { |
10375 | Elf_Internal_Rela *last_irel = NULL; | |
1d25768e | 10376 | Elf_Internal_Rela *irel, *next_rel, *rel_end; |
e0001a05 | 10377 | int removed_bytes = 0; |
1d25768e | 10378 | bfd_vma offset; |
43cd72b9 BW |
10379 | flagword predef_flags; |
10380 | ||
43cd72b9 | 10381 | predef_flags = xtensa_get_property_predef_flags (sec); |
e0001a05 | 10382 | |
1d25768e | 10383 | /* Walk over memory and relocations at the same time. |
07d6d2b8 | 10384 | This REQUIRES that the internal_relocs be sorted by offset. */ |
e0001a05 NC |
10385 | qsort (internal_relocs, sec->reloc_count, sizeof (Elf_Internal_Rela), |
10386 | internal_reloc_compare); | |
e0001a05 NC |
10387 | |
10388 | pin_internal_relocs (sec, internal_relocs); | |
10389 | pin_contents (sec, contents); | |
10390 | ||
1d25768e BW |
10391 | next_rel = internal_relocs; |
10392 | rel_end = internal_relocs + sec->reloc_count; | |
10393 | ||
a3ef2d63 | 10394 | BFD_ASSERT (sec->size % entry_size == 0); |
e0001a05 | 10395 | |
a3ef2d63 | 10396 | for (offset = 0; offset < sec->size; offset += entry_size) |
e0001a05 | 10397 | { |
1d25768e | 10398 | Elf_Internal_Rela *offset_rel, *extra_rel; |
e0001a05 | 10399 | bfd_vma bytes_to_remove, size, actual_offset; |
1d25768e | 10400 | bfd_boolean remove_this_rel; |
43cd72b9 | 10401 | flagword flags; |
e0001a05 | 10402 | |
1d25768e BW |
10403 | /* Find the first relocation for the entry at the current offset. |
10404 | Adjust the offsets of any extra relocations for the previous | |
10405 | entry. */ | |
10406 | offset_rel = NULL; | |
10407 | if (next_rel) | |
10408 | { | |
10409 | for (irel = next_rel; irel < rel_end; irel++) | |
10410 | { | |
10411 | if ((irel->r_offset == offset | |
10412 | && ELF32_R_TYPE (irel->r_info) != R_XTENSA_NONE) | |
10413 | || irel->r_offset > offset) | |
10414 | { | |
10415 | offset_rel = irel; | |
10416 | break; | |
10417 | } | |
10418 | irel->r_offset -= removed_bytes; | |
1d25768e BW |
10419 | } |
10420 | } | |
e0001a05 | 10421 | |
1d25768e BW |
10422 | /* Find the next relocation (if there are any left). */ |
10423 | extra_rel = NULL; | |
10424 | if (offset_rel) | |
e0001a05 | 10425 | { |
1d25768e | 10426 | for (irel = offset_rel + 1; irel < rel_end; irel++) |
e0001a05 | 10427 | { |
1d25768e BW |
10428 | if (ELF32_R_TYPE (irel->r_info) != R_XTENSA_NONE) |
10429 | { | |
10430 | extra_rel = irel; | |
10431 | break; | |
10432 | } | |
e0001a05 | 10433 | } |
e0001a05 NC |
10434 | } |
10435 | ||
1d25768e BW |
10436 | /* Check if there are relocations on the current entry. There |
10437 | should usually be a relocation on the offset field. If there | |
10438 | are relocations on the size or flags, then we can't optimize | |
10439 | this entry. Also, find the next relocation to examine on the | |
10440 | next iteration. */ | |
10441 | if (offset_rel) | |
e0001a05 | 10442 | { |
1d25768e | 10443 | if (offset_rel->r_offset >= offset + entry_size) |
e0001a05 | 10444 | { |
1d25768e BW |
10445 | next_rel = offset_rel; |
10446 | /* There are no relocations on the current entry, but we | |
10447 | might still be able to remove it if the size is zero. */ | |
10448 | offset_rel = NULL; | |
10449 | } | |
10450 | else if (offset_rel->r_offset > offset | |
10451 | || (extra_rel | |
10452 | && extra_rel->r_offset < offset + entry_size)) | |
10453 | { | |
10454 | /* There is a relocation on the size or flags, so we can't | |
10455 | do anything with this entry. Continue with the next. */ | |
10456 | next_rel = offset_rel; | |
10457 | continue; | |
10458 | } | |
10459 | else | |
10460 | { | |
10461 | BFD_ASSERT (offset_rel->r_offset == offset); | |
10462 | offset_rel->r_offset -= removed_bytes; | |
10463 | next_rel = offset_rel + 1; | |
e0001a05 | 10464 | } |
e0001a05 | 10465 | } |
1d25768e BW |
10466 | else |
10467 | next_rel = NULL; | |
e0001a05 | 10468 | |
1d25768e | 10469 | remove_this_rel = FALSE; |
e0001a05 NC |
10470 | bytes_to_remove = 0; |
10471 | actual_offset = offset - removed_bytes; | |
10472 | size = bfd_get_32 (abfd, &contents[actual_offset + 4]); | |
10473 | ||
68ffbac6 | 10474 | if (is_full_prop_section) |
43cd72b9 BW |
10475 | flags = bfd_get_32 (abfd, &contents[actual_offset + 8]); |
10476 | else | |
10477 | flags = predef_flags; | |
10478 | ||
1d25768e BW |
10479 | if (size == 0 |
10480 | && (flags & XTENSA_PROP_ALIGN) == 0 | |
10481 | && (flags & XTENSA_PROP_UNREACHABLE) == 0) | |
e0001a05 | 10482 | { |
43cd72b9 BW |
10483 | /* Always remove entries with zero size and no alignment. */ |
10484 | bytes_to_remove = entry_size; | |
1d25768e BW |
10485 | if (offset_rel) |
10486 | remove_this_rel = TRUE; | |
e0001a05 | 10487 | } |
1d25768e BW |
10488 | else if (offset_rel |
10489 | && ELF32_R_TYPE (offset_rel->r_info) == R_XTENSA_32) | |
e0001a05 | 10490 | { |
1d25768e | 10491 | if (last_irel) |
e0001a05 | 10492 | { |
1d25768e BW |
10493 | flagword old_flags; |
10494 | bfd_vma old_size = | |
10495 | bfd_get_32 (abfd, &contents[last_irel->r_offset + 4]); | |
10496 | bfd_vma old_address = | |
10497 | (last_irel->r_addend | |
10498 | + bfd_get_32 (abfd, &contents[last_irel->r_offset])); | |
10499 | bfd_vma new_address = | |
10500 | (offset_rel->r_addend | |
10501 | + bfd_get_32 (abfd, &contents[actual_offset])); | |
68ffbac6 | 10502 | if (is_full_prop_section) |
1d25768e BW |
10503 | old_flags = bfd_get_32 |
10504 | (abfd, &contents[last_irel->r_offset + 8]); | |
10505 | else | |
10506 | old_flags = predef_flags; | |
10507 | ||
10508 | if ((ELF32_R_SYM (offset_rel->r_info) | |
10509 | == ELF32_R_SYM (last_irel->r_info)) | |
10510 | && old_address + old_size == new_address | |
10511 | && old_flags == flags | |
10512 | && (old_flags & XTENSA_PROP_INSN_BRANCH_TARGET) == 0 | |
10513 | && (old_flags & XTENSA_PROP_INSN_LOOP_TARGET) == 0) | |
e0001a05 | 10514 | { |
1d25768e BW |
10515 | /* Fix the old size. */ |
10516 | bfd_put_32 (abfd, old_size + size, | |
10517 | &contents[last_irel->r_offset + 4]); | |
10518 | bytes_to_remove = entry_size; | |
10519 | remove_this_rel = TRUE; | |
e0001a05 NC |
10520 | } |
10521 | else | |
1d25768e | 10522 | last_irel = offset_rel; |
e0001a05 | 10523 | } |
1d25768e BW |
10524 | else |
10525 | last_irel = offset_rel; | |
e0001a05 NC |
10526 | } |
10527 | ||
1d25768e | 10528 | if (remove_this_rel) |
e0001a05 | 10529 | { |
1d25768e | 10530 | offset_rel->r_info = ELF32_R_INFO (0, R_XTENSA_NONE); |
3df502ae | 10531 | offset_rel->r_offset = 0; |
e0001a05 NC |
10532 | } |
10533 | ||
10534 | if (bytes_to_remove != 0) | |
10535 | { | |
10536 | removed_bytes += bytes_to_remove; | |
a3ef2d63 | 10537 | if (offset + bytes_to_remove < sec->size) |
e0001a05 | 10538 | memmove (&contents[actual_offset], |
43cd72b9 | 10539 | &contents[actual_offset + bytes_to_remove], |
a3ef2d63 | 10540 | sec->size - offset - bytes_to_remove); |
e0001a05 NC |
10541 | } |
10542 | } | |
10543 | ||
43cd72b9 | 10544 | if (removed_bytes) |
e0001a05 | 10545 | { |
1d25768e BW |
10546 | /* Fix up any extra relocations on the last entry. */ |
10547 | for (irel = next_rel; irel < rel_end; irel++) | |
10548 | irel->r_offset -= removed_bytes; | |
10549 | ||
e0001a05 | 10550 | /* Clear the removed bytes. */ |
a3ef2d63 | 10551 | memset (&contents[sec->size - removed_bytes], 0, removed_bytes); |
e0001a05 | 10552 | |
a3ef2d63 BW |
10553 | if (sec->rawsize == 0) |
10554 | sec->rawsize = sec->size; | |
10555 | sec->size -= removed_bytes; | |
e901de89 BW |
10556 | |
10557 | if (xtensa_is_littable_section (sec)) | |
10558 | { | |
f0e6fdb2 BW |
10559 | asection *sgotloc = elf_xtensa_hash_table (link_info)->sgotloc; |
10560 | if (sgotloc) | |
10561 | sgotloc->size -= removed_bytes; | |
e901de89 | 10562 | } |
e0001a05 NC |
10563 | } |
10564 | } | |
e901de89 | 10565 | |
e0001a05 NC |
10566 | error_return: |
10567 | release_internal_relocs (sec, internal_relocs); | |
10568 | release_contents (sec, contents); | |
10569 | return ok; | |
10570 | } | |
10571 | ||
10572 | \f | |
10573 | /* Third relaxation pass. */ | |
10574 | ||
10575 | /* Change symbol values to account for removed literals. */ | |
10576 | ||
43cd72b9 | 10577 | bfd_boolean |
7fa3d080 | 10578 | relax_section_symbols (bfd *abfd, asection *sec) |
e0001a05 NC |
10579 | { |
10580 | xtensa_relax_info *relax_info; | |
10581 | unsigned int sec_shndx; | |
10582 | Elf_Internal_Shdr *symtab_hdr; | |
10583 | Elf_Internal_Sym *isymbuf; | |
10584 | unsigned i, num_syms, num_locals; | |
10585 | ||
10586 | relax_info = get_xtensa_relax_info (sec); | |
10587 | BFD_ASSERT (relax_info); | |
10588 | ||
43cd72b9 BW |
10589 | if (!relax_info->is_relaxable_literal_section |
10590 | && !relax_info->is_relaxable_asm_section) | |
e0001a05 NC |
10591 | return TRUE; |
10592 | ||
10593 | sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec); | |
10594 | ||
10595 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
10596 | isymbuf = retrieve_local_syms (abfd); | |
10597 | ||
10598 | num_syms = symtab_hdr->sh_size / sizeof (Elf32_External_Sym); | |
10599 | num_locals = symtab_hdr->sh_info; | |
10600 | ||
10601 | /* Adjust the local symbols defined in this section. */ | |
10602 | for (i = 0; i < num_locals; i++) | |
10603 | { | |
10604 | Elf_Internal_Sym *isym = &isymbuf[i]; | |
10605 | ||
10606 | if (isym->st_shndx == sec_shndx) | |
10607 | { | |
03669f1c | 10608 | bfd_vma orig_addr = isym->st_value; |
071aa5c9 MF |
10609 | int removed = removed_by_actions_map (&relax_info->action_list, |
10610 | orig_addr, FALSE); | |
43cd72b9 | 10611 | |
071aa5c9 | 10612 | isym->st_value -= removed; |
03669f1c BW |
10613 | if (ELF32_ST_TYPE (isym->st_info) == STT_FUNC) |
10614 | isym->st_size -= | |
071aa5c9 MF |
10615 | removed_by_actions_map (&relax_info->action_list, |
10616 | orig_addr + isym->st_size, FALSE) - | |
10617 | removed; | |
e0001a05 NC |
10618 | } |
10619 | } | |
10620 | ||
10621 | /* Now adjust the global symbols defined in this section. */ | |
10622 | for (i = 0; i < (num_syms - num_locals); i++) | |
10623 | { | |
10624 | struct elf_link_hash_entry *sym_hash; | |
10625 | ||
10626 | sym_hash = elf_sym_hashes (abfd)[i]; | |
10627 | ||
10628 | if (sym_hash->root.type == bfd_link_hash_warning) | |
10629 | sym_hash = (struct elf_link_hash_entry *) sym_hash->root.u.i.link; | |
10630 | ||
10631 | if ((sym_hash->root.type == bfd_link_hash_defined | |
10632 | || sym_hash->root.type == bfd_link_hash_defweak) | |
10633 | && sym_hash->root.u.def.section == sec) | |
10634 | { | |
03669f1c | 10635 | bfd_vma orig_addr = sym_hash->root.u.def.value; |
071aa5c9 MF |
10636 | int removed = removed_by_actions_map (&relax_info->action_list, |
10637 | orig_addr, FALSE); | |
43cd72b9 | 10638 | |
071aa5c9 | 10639 | sym_hash->root.u.def.value -= removed; |
43cd72b9 | 10640 | |
03669f1c BW |
10641 | if (sym_hash->type == STT_FUNC) |
10642 | sym_hash->size -= | |
071aa5c9 MF |
10643 | removed_by_actions_map (&relax_info->action_list, |
10644 | orig_addr + sym_hash->size, FALSE) - | |
10645 | removed; | |
e0001a05 NC |
10646 | } |
10647 | } | |
10648 | ||
10649 | return TRUE; | |
10650 | } | |
10651 | ||
10652 | \f | |
10653 | /* "Fix" handling functions, called while performing relocations. */ | |
10654 | ||
43cd72b9 | 10655 | static bfd_boolean |
7fa3d080 BW |
10656 | do_fix_for_relocatable_link (Elf_Internal_Rela *rel, |
10657 | bfd *input_bfd, | |
10658 | asection *input_section, | |
10659 | bfd_byte *contents) | |
e0001a05 NC |
10660 | { |
10661 | r_reloc r_rel; | |
10662 | asection *sec, *old_sec; | |
10663 | bfd_vma old_offset; | |
10664 | int r_type = ELF32_R_TYPE (rel->r_info); | |
e0001a05 NC |
10665 | reloc_bfd_fix *fix; |
10666 | ||
10667 | if (r_type == R_XTENSA_NONE) | |
43cd72b9 | 10668 | return TRUE; |
e0001a05 | 10669 | |
43cd72b9 BW |
10670 | fix = get_bfd_fix (input_section, rel->r_offset, r_type); |
10671 | if (!fix) | |
10672 | return TRUE; | |
e0001a05 | 10673 | |
43cd72b9 BW |
10674 | r_reloc_init (&r_rel, input_bfd, rel, contents, |
10675 | bfd_get_section_limit (input_bfd, input_section)); | |
e0001a05 | 10676 | old_sec = r_reloc_get_section (&r_rel); |
43cd72b9 BW |
10677 | old_offset = r_rel.target_offset; |
10678 | ||
10679 | if (!old_sec || !r_reloc_is_defined (&r_rel)) | |
e0001a05 | 10680 | { |
43cd72b9 BW |
10681 | if (r_type != R_XTENSA_ASM_EXPAND) |
10682 | { | |
4eca0228 | 10683 | _bfd_error_handler |
695344c0 | 10684 | /* xgettext:c-format */ |
2dcf00ce AM |
10685 | (_("%pB(%pA+%#" PRIx64 "): unexpected fix for %s relocation"), |
10686 | input_bfd, input_section, (uint64_t) rel->r_offset, | |
43cd72b9 BW |
10687 | elf_howto_table[r_type].name); |
10688 | return FALSE; | |
10689 | } | |
e0001a05 NC |
10690 | /* Leave it be. Resolution will happen in a later stage. */ |
10691 | } | |
10692 | else | |
10693 | { | |
10694 | sec = fix->target_sec; | |
10695 | rel->r_addend += ((sec->output_offset + fix->target_offset) | |
10696 | - (old_sec->output_offset + old_offset)); | |
10697 | } | |
43cd72b9 | 10698 | return TRUE; |
e0001a05 NC |
10699 | } |
10700 | ||
10701 | ||
10702 | static void | |
7fa3d080 BW |
10703 | do_fix_for_final_link (Elf_Internal_Rela *rel, |
10704 | bfd *input_bfd, | |
10705 | asection *input_section, | |
10706 | bfd_byte *contents, | |
10707 | bfd_vma *relocationp) | |
e0001a05 NC |
10708 | { |
10709 | asection *sec; | |
10710 | int r_type = ELF32_R_TYPE (rel->r_info); | |
e0001a05 | 10711 | reloc_bfd_fix *fix; |
43cd72b9 | 10712 | bfd_vma fixup_diff; |
e0001a05 NC |
10713 | |
10714 | if (r_type == R_XTENSA_NONE) | |
10715 | return; | |
10716 | ||
43cd72b9 BW |
10717 | fix = get_bfd_fix (input_section, rel->r_offset, r_type); |
10718 | if (!fix) | |
e0001a05 NC |
10719 | return; |
10720 | ||
10721 | sec = fix->target_sec; | |
43cd72b9 BW |
10722 | |
10723 | fixup_diff = rel->r_addend; | |
10724 | if (elf_howto_table[fix->src_type].partial_inplace) | |
10725 | { | |
10726 | bfd_vma inplace_val; | |
10727 | BFD_ASSERT (fix->src_offset | |
10728 | < bfd_get_section_limit (input_bfd, input_section)); | |
10729 | inplace_val = bfd_get_32 (input_bfd, &contents[fix->src_offset]); | |
10730 | fixup_diff += inplace_val; | |
10731 | } | |
10732 | ||
e0001a05 NC |
10733 | *relocationp = (sec->output_section->vma |
10734 | + sec->output_offset | |
43cd72b9 | 10735 | + fix->target_offset - fixup_diff); |
e0001a05 NC |
10736 | } |
10737 | ||
10738 | \f | |
10739 | /* Miscellaneous utility functions.... */ | |
10740 | ||
10741 | static asection * | |
f0e6fdb2 | 10742 | elf_xtensa_get_plt_section (struct bfd_link_info *info, int chunk) |
e0001a05 | 10743 | { |
f0e6fdb2 | 10744 | bfd *dynobj; |
0bae9e9e | 10745 | char plt_name[17]; |
e0001a05 NC |
10746 | |
10747 | if (chunk == 0) | |
ce558b89 | 10748 | return elf_hash_table (info)->splt; |
e0001a05 | 10749 | |
f0e6fdb2 | 10750 | dynobj = elf_hash_table (info)->dynobj; |
e0001a05 | 10751 | sprintf (plt_name, ".plt.%u", chunk); |
3d4d4302 | 10752 | return bfd_get_linker_section (dynobj, plt_name); |
e0001a05 NC |
10753 | } |
10754 | ||
10755 | ||
10756 | static asection * | |
f0e6fdb2 | 10757 | elf_xtensa_get_gotplt_section (struct bfd_link_info *info, int chunk) |
e0001a05 | 10758 | { |
f0e6fdb2 | 10759 | bfd *dynobj; |
0bae9e9e | 10760 | char got_name[21]; |
e0001a05 NC |
10761 | |
10762 | if (chunk == 0) | |
ce558b89 | 10763 | return elf_hash_table (info)->sgotplt; |
e0001a05 | 10764 | |
f0e6fdb2 | 10765 | dynobj = elf_hash_table (info)->dynobj; |
e0001a05 | 10766 | sprintf (got_name, ".got.plt.%u", chunk); |
3d4d4302 | 10767 | return bfd_get_linker_section (dynobj, got_name); |
e0001a05 NC |
10768 | } |
10769 | ||
10770 | ||
10771 | /* Get the input section for a given symbol index. | |
10772 | If the symbol is: | |
10773 | . a section symbol, return the section; | |
10774 | . a common symbol, return the common section; | |
10775 | . an undefined symbol, return the undefined section; | |
10776 | . an indirect symbol, follow the links; | |
10777 | . an absolute value, return the absolute section. */ | |
10778 | ||
10779 | static asection * | |
7fa3d080 | 10780 | get_elf_r_symndx_section (bfd *abfd, unsigned long r_symndx) |
e0001a05 NC |
10781 | { |
10782 | Elf_Internal_Shdr *symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
10783 | asection *target_sec = NULL; | |
43cd72b9 | 10784 | if (r_symndx < symtab_hdr->sh_info) |
e0001a05 NC |
10785 | { |
10786 | Elf_Internal_Sym *isymbuf; | |
10787 | unsigned int section_index; | |
10788 | ||
10789 | isymbuf = retrieve_local_syms (abfd); | |
10790 | section_index = isymbuf[r_symndx].st_shndx; | |
10791 | ||
10792 | if (section_index == SHN_UNDEF) | |
10793 | target_sec = bfd_und_section_ptr; | |
e0001a05 NC |
10794 | else if (section_index == SHN_ABS) |
10795 | target_sec = bfd_abs_section_ptr; | |
10796 | else if (section_index == SHN_COMMON) | |
10797 | target_sec = bfd_com_section_ptr; | |
43cd72b9 | 10798 | else |
cb33740c | 10799 | target_sec = bfd_section_from_elf_index (abfd, section_index); |
e0001a05 NC |
10800 | } |
10801 | else | |
10802 | { | |
10803 | unsigned long indx = r_symndx - symtab_hdr->sh_info; | |
10804 | struct elf_link_hash_entry *h = elf_sym_hashes (abfd)[indx]; | |
10805 | ||
10806 | while (h->root.type == bfd_link_hash_indirect | |
07d6d2b8 AM |
10807 | || h->root.type == bfd_link_hash_warning) |
10808 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
e0001a05 NC |
10809 | |
10810 | switch (h->root.type) | |
10811 | { | |
10812 | case bfd_link_hash_defined: | |
10813 | case bfd_link_hash_defweak: | |
10814 | target_sec = h->root.u.def.section; | |
10815 | break; | |
10816 | case bfd_link_hash_common: | |
10817 | target_sec = bfd_com_section_ptr; | |
10818 | break; | |
10819 | case bfd_link_hash_undefined: | |
10820 | case bfd_link_hash_undefweak: | |
10821 | target_sec = bfd_und_section_ptr; | |
10822 | break; | |
10823 | default: /* New indirect warning. */ | |
10824 | target_sec = bfd_und_section_ptr; | |
10825 | break; | |
10826 | } | |
10827 | } | |
10828 | return target_sec; | |
10829 | } | |
10830 | ||
10831 | ||
10832 | static struct elf_link_hash_entry * | |
7fa3d080 | 10833 | get_elf_r_symndx_hash_entry (bfd *abfd, unsigned long r_symndx) |
e0001a05 NC |
10834 | { |
10835 | unsigned long indx; | |
10836 | struct elf_link_hash_entry *h; | |
10837 | Elf_Internal_Shdr *symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
10838 | ||
10839 | if (r_symndx < symtab_hdr->sh_info) | |
10840 | return NULL; | |
43cd72b9 | 10841 | |
e0001a05 NC |
10842 | indx = r_symndx - symtab_hdr->sh_info; |
10843 | h = elf_sym_hashes (abfd)[indx]; | |
10844 | while (h->root.type == bfd_link_hash_indirect | |
10845 | || h->root.type == bfd_link_hash_warning) | |
10846 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
10847 | return h; | |
10848 | } | |
10849 | ||
10850 | ||
10851 | /* Get the section-relative offset for a symbol number. */ | |
10852 | ||
10853 | static bfd_vma | |
7fa3d080 | 10854 | get_elf_r_symndx_offset (bfd *abfd, unsigned long r_symndx) |
e0001a05 NC |
10855 | { |
10856 | Elf_Internal_Shdr *symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
10857 | bfd_vma offset = 0; | |
10858 | ||
43cd72b9 | 10859 | if (r_symndx < symtab_hdr->sh_info) |
e0001a05 NC |
10860 | { |
10861 | Elf_Internal_Sym *isymbuf; | |
10862 | isymbuf = retrieve_local_syms (abfd); | |
10863 | offset = isymbuf[r_symndx].st_value; | |
10864 | } | |
10865 | else | |
10866 | { | |
10867 | unsigned long indx = r_symndx - symtab_hdr->sh_info; | |
10868 | struct elf_link_hash_entry *h = | |
10869 | elf_sym_hashes (abfd)[indx]; | |
10870 | ||
10871 | while (h->root.type == bfd_link_hash_indirect | |
07d6d2b8 | 10872 | || h->root.type == bfd_link_hash_warning) |
e0001a05 NC |
10873 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
10874 | if (h->root.type == bfd_link_hash_defined | |
07d6d2b8 | 10875 | || h->root.type == bfd_link_hash_defweak) |
e0001a05 NC |
10876 | offset = h->root.u.def.value; |
10877 | } | |
10878 | return offset; | |
10879 | } | |
10880 | ||
10881 | ||
10882 | static bfd_boolean | |
7fa3d080 | 10883 | is_reloc_sym_weak (bfd *abfd, Elf_Internal_Rela *rel) |
43cd72b9 BW |
10884 | { |
10885 | unsigned long r_symndx = ELF32_R_SYM (rel->r_info); | |
10886 | struct elf_link_hash_entry *h; | |
10887 | ||
10888 | h = get_elf_r_symndx_hash_entry (abfd, r_symndx); | |
10889 | if (h && h->root.type == bfd_link_hash_defweak) | |
10890 | return TRUE; | |
10891 | return FALSE; | |
10892 | } | |
10893 | ||
10894 | ||
10895 | static bfd_boolean | |
7fa3d080 BW |
10896 | pcrel_reloc_fits (xtensa_opcode opc, |
10897 | int opnd, | |
10898 | bfd_vma self_address, | |
10899 | bfd_vma dest_address) | |
e0001a05 | 10900 | { |
43cd72b9 BW |
10901 | xtensa_isa isa = xtensa_default_isa; |
10902 | uint32 valp = dest_address; | |
10903 | if (xtensa_operand_do_reloc (isa, opc, opnd, &valp, self_address) | |
10904 | || xtensa_operand_encode (isa, opc, opnd, &valp)) | |
10905 | return FALSE; | |
10906 | return TRUE; | |
e0001a05 NC |
10907 | } |
10908 | ||
10909 | ||
68ffbac6 | 10910 | static bfd_boolean |
7fa3d080 | 10911 | xtensa_is_property_section (asection *sec) |
e0001a05 | 10912 | { |
1d25768e BW |
10913 | if (xtensa_is_insntable_section (sec) |
10914 | || xtensa_is_littable_section (sec) | |
10915 | || xtensa_is_proptable_section (sec)) | |
b614a702 | 10916 | return TRUE; |
e901de89 | 10917 | |
1d25768e BW |
10918 | return FALSE; |
10919 | } | |
10920 | ||
10921 | ||
68ffbac6 | 10922 | static bfd_boolean |
1d25768e BW |
10923 | xtensa_is_insntable_section (asection *sec) |
10924 | { | |
10925 | if (CONST_STRNEQ (sec->name, XTENSA_INSN_SEC_NAME) | |
10926 | || CONST_STRNEQ (sec->name, ".gnu.linkonce.x.")) | |
e901de89 BW |
10927 | return TRUE; |
10928 | ||
e901de89 BW |
10929 | return FALSE; |
10930 | } | |
10931 | ||
10932 | ||
68ffbac6 | 10933 | static bfd_boolean |
7fa3d080 | 10934 | xtensa_is_littable_section (asection *sec) |
e901de89 | 10935 | { |
1d25768e BW |
10936 | if (CONST_STRNEQ (sec->name, XTENSA_LIT_SEC_NAME) |
10937 | || CONST_STRNEQ (sec->name, ".gnu.linkonce.p.")) | |
b614a702 | 10938 | return TRUE; |
e901de89 | 10939 | |
1d25768e BW |
10940 | return FALSE; |
10941 | } | |
10942 | ||
10943 | ||
68ffbac6 | 10944 | static bfd_boolean |
1d25768e BW |
10945 | xtensa_is_proptable_section (asection *sec) |
10946 | { | |
10947 | if (CONST_STRNEQ (sec->name, XTENSA_PROP_SEC_NAME) | |
10948 | || CONST_STRNEQ (sec->name, ".gnu.linkonce.prop.")) | |
e901de89 | 10949 | return TRUE; |
e0001a05 | 10950 | |
e901de89 | 10951 | return FALSE; |
e0001a05 NC |
10952 | } |
10953 | ||
10954 | ||
43cd72b9 | 10955 | static int |
7fa3d080 | 10956 | internal_reloc_compare (const void *ap, const void *bp) |
e0001a05 | 10957 | { |
43cd72b9 BW |
10958 | const Elf_Internal_Rela *a = (const Elf_Internal_Rela *) ap; |
10959 | const Elf_Internal_Rela *b = (const Elf_Internal_Rela *) bp; | |
10960 | ||
10961 | if (a->r_offset != b->r_offset) | |
10962 | return (a->r_offset - b->r_offset); | |
10963 | ||
10964 | /* We don't need to sort on these criteria for correctness, | |
10965 | but enforcing a more strict ordering prevents unstable qsort | |
10966 | from behaving differently with different implementations. | |
10967 | Without the code below we get correct but different results | |
10968 | on Solaris 2.7 and 2.8. We would like to always produce the | |
10969 | same results no matter the host. */ | |
10970 | ||
10971 | if (a->r_info != b->r_info) | |
10972 | return (a->r_info - b->r_info); | |
10973 | ||
10974 | return (a->r_addend - b->r_addend); | |
e0001a05 NC |
10975 | } |
10976 | ||
10977 | ||
10978 | static int | |
7fa3d080 | 10979 | internal_reloc_matches (const void *ap, const void *bp) |
e0001a05 NC |
10980 | { |
10981 | const Elf_Internal_Rela *a = (const Elf_Internal_Rela *) ap; | |
10982 | const Elf_Internal_Rela *b = (const Elf_Internal_Rela *) bp; | |
10983 | ||
43cd72b9 BW |
10984 | /* Check if one entry overlaps with the other; this shouldn't happen |
10985 | except when searching for a match. */ | |
e0001a05 NC |
10986 | return (a->r_offset - b->r_offset); |
10987 | } | |
10988 | ||
10989 | ||
74869ac7 BW |
10990 | /* Predicate function used to look up a section in a particular group. */ |
10991 | ||
10992 | static bfd_boolean | |
10993 | match_section_group (bfd *abfd ATTRIBUTE_UNUSED, asection *sec, void *inf) | |
10994 | { | |
10995 | const char *gname = inf; | |
10996 | const char *group_name = elf_group_name (sec); | |
68ffbac6 | 10997 | |
74869ac7 BW |
10998 | return (group_name == gname |
10999 | || (group_name != NULL | |
11000 | && gname != NULL | |
11001 | && strcmp (group_name, gname) == 0)); | |
11002 | } | |
11003 | ||
11004 | ||
8255c61b MF |
11005 | static char * |
11006 | xtensa_add_names (const char *base, const char *suffix) | |
11007 | { | |
11008 | if (suffix) | |
11009 | { | |
11010 | size_t base_len = strlen (base); | |
11011 | size_t suffix_len = strlen (suffix); | |
11012 | char *str = bfd_malloc (base_len + suffix_len + 1); | |
11013 | ||
11014 | memcpy (str, base, base_len); | |
11015 | memcpy (str + base_len, suffix, suffix_len + 1); | |
11016 | return str; | |
11017 | } | |
11018 | else | |
11019 | { | |
11020 | return strdup (base); | |
11021 | } | |
11022 | } | |
11023 | ||
1d25768e BW |
11024 | static int linkonce_len = sizeof (".gnu.linkonce.") - 1; |
11025 | ||
51c8ebc1 | 11026 | static char * |
8255c61b MF |
11027 | xtensa_property_section_name (asection *sec, const char *base_name, |
11028 | bfd_boolean separate_sections) | |
e0001a05 | 11029 | { |
74869ac7 BW |
11030 | const char *suffix, *group_name; |
11031 | char *prop_sec_name; | |
74869ac7 BW |
11032 | |
11033 | group_name = elf_group_name (sec); | |
11034 | if (group_name) | |
11035 | { | |
11036 | suffix = strrchr (sec->name, '.'); | |
11037 | if (suffix == sec->name) | |
11038 | suffix = 0; | |
8255c61b | 11039 | prop_sec_name = xtensa_add_names (base_name, suffix); |
74869ac7 BW |
11040 | } |
11041 | else if (strncmp (sec->name, ".gnu.linkonce.", linkonce_len) == 0) | |
e0001a05 | 11042 | { |
43cd72b9 | 11043 | char *linkonce_kind = 0; |
b614a702 | 11044 | |
68ffbac6 | 11045 | if (strcmp (base_name, XTENSA_INSN_SEC_NAME) == 0) |
7db48a12 | 11046 | linkonce_kind = "x."; |
68ffbac6 | 11047 | else if (strcmp (base_name, XTENSA_LIT_SEC_NAME) == 0) |
7db48a12 | 11048 | linkonce_kind = "p."; |
43cd72b9 BW |
11049 | else if (strcmp (base_name, XTENSA_PROP_SEC_NAME) == 0) |
11050 | linkonce_kind = "prop."; | |
e0001a05 | 11051 | else |
b614a702 BW |
11052 | abort (); |
11053 | ||
43cd72b9 BW |
11054 | prop_sec_name = (char *) bfd_malloc (strlen (sec->name) |
11055 | + strlen (linkonce_kind) + 1); | |
b614a702 | 11056 | memcpy (prop_sec_name, ".gnu.linkonce.", linkonce_len); |
43cd72b9 | 11057 | strcpy (prop_sec_name + linkonce_len, linkonce_kind); |
b614a702 BW |
11058 | |
11059 | suffix = sec->name + linkonce_len; | |
096c35a7 | 11060 | /* For backward compatibility, replace "t." instead of inserting |
07d6d2b8 | 11061 | the new linkonce_kind (but not for "prop" sections). */ |
0112cd26 | 11062 | if (CONST_STRNEQ (suffix, "t.") && linkonce_kind[1] == '.') |
07d6d2b8 | 11063 | suffix += 2; |
43cd72b9 | 11064 | strcat (prop_sec_name + linkonce_len, suffix); |
74869ac7 BW |
11065 | } |
11066 | else | |
8255c61b MF |
11067 | { |
11068 | prop_sec_name = xtensa_add_names (base_name, | |
11069 | separate_sections ? sec->name : NULL); | |
11070 | } | |
74869ac7 | 11071 | |
51c8ebc1 BW |
11072 | return prop_sec_name; |
11073 | } | |
11074 | ||
11075 | ||
11076 | static asection * | |
8255c61b MF |
11077 | xtensa_get_separate_property_section (asection *sec, const char *base_name, |
11078 | bfd_boolean separate_section) | |
51c8ebc1 BW |
11079 | { |
11080 | char *prop_sec_name; | |
11081 | asection *prop_sec; | |
11082 | ||
8255c61b MF |
11083 | prop_sec_name = xtensa_property_section_name (sec, base_name, |
11084 | separate_section); | |
51c8ebc1 BW |
11085 | prop_sec = bfd_get_section_by_name_if (sec->owner, prop_sec_name, |
11086 | match_section_group, | |
11087 | (void *) elf_group_name (sec)); | |
11088 | free (prop_sec_name); | |
11089 | return prop_sec; | |
11090 | } | |
11091 | ||
8255c61b MF |
11092 | static asection * |
11093 | xtensa_get_property_section (asection *sec, const char *base_name) | |
11094 | { | |
11095 | asection *prop_sec; | |
11096 | ||
11097 | /* Try individual property section first. */ | |
11098 | prop_sec = xtensa_get_separate_property_section (sec, base_name, TRUE); | |
11099 | ||
11100 | /* Refer to a common property section if individual is not present. */ | |
11101 | if (!prop_sec) | |
11102 | prop_sec = xtensa_get_separate_property_section (sec, base_name, FALSE); | |
11103 | ||
11104 | return prop_sec; | |
11105 | } | |
11106 | ||
51c8ebc1 BW |
11107 | |
11108 | asection * | |
11109 | xtensa_make_property_section (asection *sec, const char *base_name) | |
11110 | { | |
11111 | char *prop_sec_name; | |
11112 | asection *prop_sec; | |
11113 | ||
74869ac7 | 11114 | /* Check if the section already exists. */ |
8255c61b MF |
11115 | prop_sec_name = xtensa_property_section_name (sec, base_name, |
11116 | elf32xtensa_separate_props); | |
74869ac7 BW |
11117 | prop_sec = bfd_get_section_by_name_if (sec->owner, prop_sec_name, |
11118 | match_section_group, | |
51c8ebc1 | 11119 | (void *) elf_group_name (sec)); |
74869ac7 BW |
11120 | /* If not, create it. */ |
11121 | if (! prop_sec) | |
11122 | { | |
11123 | flagword flags = (SEC_RELOC | SEC_HAS_CONTENTS | SEC_READONLY); | |
11124 | flags |= (bfd_get_section_flags (sec->owner, sec) | |
11125 | & (SEC_LINK_ONCE | SEC_LINK_DUPLICATES)); | |
11126 | ||
11127 | prop_sec = bfd_make_section_anyway_with_flags | |
11128 | (sec->owner, strdup (prop_sec_name), flags); | |
11129 | if (! prop_sec) | |
11130 | return 0; | |
b614a702 | 11131 | |
51c8ebc1 | 11132 | elf_group_name (prop_sec) = elf_group_name (sec); |
e0001a05 NC |
11133 | } |
11134 | ||
74869ac7 BW |
11135 | free (prop_sec_name); |
11136 | return prop_sec; | |
e0001a05 NC |
11137 | } |
11138 | ||
43cd72b9 BW |
11139 | |
11140 | flagword | |
7fa3d080 | 11141 | xtensa_get_property_predef_flags (asection *sec) |
43cd72b9 | 11142 | { |
1d25768e | 11143 | if (xtensa_is_insntable_section (sec)) |
43cd72b9 | 11144 | return (XTENSA_PROP_INSN |
99ded152 | 11145 | | XTENSA_PROP_NO_TRANSFORM |
43cd72b9 BW |
11146 | | XTENSA_PROP_INSN_NO_REORDER); |
11147 | ||
11148 | if (xtensa_is_littable_section (sec)) | |
11149 | return (XTENSA_PROP_LITERAL | |
99ded152 | 11150 | | XTENSA_PROP_NO_TRANSFORM |
43cd72b9 BW |
11151 | | XTENSA_PROP_INSN_NO_REORDER); |
11152 | ||
11153 | return 0; | |
11154 | } | |
11155 | ||
e0001a05 NC |
11156 | \f |
11157 | /* Other functions called directly by the linker. */ | |
11158 | ||
11159 | bfd_boolean | |
7fa3d080 BW |
11160 | xtensa_callback_required_dependence (bfd *abfd, |
11161 | asection *sec, | |
11162 | struct bfd_link_info *link_info, | |
11163 | deps_callback_t callback, | |
11164 | void *closure) | |
e0001a05 NC |
11165 | { |
11166 | Elf_Internal_Rela *internal_relocs; | |
11167 | bfd_byte *contents; | |
11168 | unsigned i; | |
11169 | bfd_boolean ok = TRUE; | |
43cd72b9 BW |
11170 | bfd_size_type sec_size; |
11171 | ||
11172 | sec_size = bfd_get_section_limit (abfd, sec); | |
e0001a05 NC |
11173 | |
11174 | /* ".plt*" sections have no explicit relocations but they contain L32R | |
11175 | instructions that reference the corresponding ".got.plt*" sections. */ | |
11176 | if ((sec->flags & SEC_LINKER_CREATED) != 0 | |
0112cd26 | 11177 | && CONST_STRNEQ (sec->name, ".plt")) |
e0001a05 NC |
11178 | { |
11179 | asection *sgotplt; | |
11180 | ||
11181 | /* Find the corresponding ".got.plt*" section. */ | |
11182 | if (sec->name[4] == '\0') | |
ce558b89 | 11183 | sgotplt = elf_hash_table (link_info)->sgotplt; |
e0001a05 NC |
11184 | else |
11185 | { | |
11186 | char got_name[14]; | |
11187 | int chunk = 0; | |
11188 | ||
11189 | BFD_ASSERT (sec->name[4] == '.'); | |
11190 | chunk = strtol (&sec->name[5], NULL, 10); | |
11191 | ||
11192 | sprintf (got_name, ".got.plt.%u", chunk); | |
3d4d4302 | 11193 | sgotplt = bfd_get_linker_section (sec->owner, got_name); |
e0001a05 NC |
11194 | } |
11195 | BFD_ASSERT (sgotplt); | |
11196 | ||
11197 | /* Assume worst-case offsets: L32R at the very end of the ".plt" | |
11198 | section referencing a literal at the very beginning of | |
11199 | ".got.plt". This is very close to the real dependence, anyway. */ | |
43cd72b9 | 11200 | (*callback) (sec, sec_size, sgotplt, 0, closure); |
e0001a05 NC |
11201 | } |
11202 | ||
13161072 BW |
11203 | /* Only ELF files are supported for Xtensa. Check here to avoid a segfault |
11204 | when building uclibc, which runs "ld -b binary /dev/null". */ | |
11205 | if (bfd_get_flavour (abfd) != bfd_target_elf_flavour) | |
11206 | return ok; | |
11207 | ||
68ffbac6 | 11208 | internal_relocs = retrieve_internal_relocs (abfd, sec, |
e0001a05 NC |
11209 | link_info->keep_memory); |
11210 | if (internal_relocs == NULL | |
43cd72b9 | 11211 | || sec->reloc_count == 0) |
e0001a05 NC |
11212 | return ok; |
11213 | ||
11214 | /* Cache the contents for the duration of this scan. */ | |
11215 | contents = retrieve_contents (abfd, sec, link_info->keep_memory); | |
43cd72b9 | 11216 | if (contents == NULL && sec_size != 0) |
e0001a05 NC |
11217 | { |
11218 | ok = FALSE; | |
11219 | goto error_return; | |
11220 | } | |
11221 | ||
43cd72b9 BW |
11222 | if (!xtensa_default_isa) |
11223 | xtensa_default_isa = xtensa_isa_init (0, 0); | |
e0001a05 | 11224 | |
43cd72b9 | 11225 | for (i = 0; i < sec->reloc_count; i++) |
e0001a05 NC |
11226 | { |
11227 | Elf_Internal_Rela *irel = &internal_relocs[i]; | |
43cd72b9 | 11228 | if (is_l32r_relocation (abfd, sec, contents, irel)) |
e0001a05 NC |
11229 | { |
11230 | r_reloc l32r_rel; | |
11231 | asection *target_sec; | |
11232 | bfd_vma target_offset; | |
43cd72b9 BW |
11233 | |
11234 | r_reloc_init (&l32r_rel, abfd, irel, contents, sec_size); | |
e0001a05 NC |
11235 | target_sec = NULL; |
11236 | target_offset = 0; | |
11237 | /* L32Rs must be local to the input file. */ | |
11238 | if (r_reloc_is_defined (&l32r_rel)) | |
11239 | { | |
11240 | target_sec = r_reloc_get_section (&l32r_rel); | |
43cd72b9 | 11241 | target_offset = l32r_rel.target_offset; |
e0001a05 NC |
11242 | } |
11243 | (*callback) (sec, irel->r_offset, target_sec, target_offset, | |
11244 | closure); | |
11245 | } | |
11246 | } | |
11247 | ||
11248 | error_return: | |
11249 | release_internal_relocs (sec, internal_relocs); | |
11250 | release_contents (sec, contents); | |
11251 | return ok; | |
11252 | } | |
11253 | ||
2f89ff8d L |
11254 | /* The default literal sections should always be marked as "code" (i.e., |
11255 | SHF_EXECINSTR). This is particularly important for the Linux kernel | |
11256 | module loader so that the literals are not placed after the text. */ | |
b35d266b | 11257 | static const struct bfd_elf_special_section elf_xtensa_special_sections[] = |
2f89ff8d | 11258 | { |
0112cd26 NC |
11259 | { STRING_COMMA_LEN (".fini.literal"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR }, |
11260 | { STRING_COMMA_LEN (".init.literal"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR }, | |
07d6d2b8 AM |
11261 | { STRING_COMMA_LEN (".literal"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR }, |
11262 | { STRING_COMMA_LEN (".xtensa.info"), 0, SHT_NOTE, 0 }, | |
11263 | { NULL, 0, 0, 0, 0 } | |
7f4d3958 | 11264 | }; |
e0001a05 | 11265 | \f |
ae95ffa6 | 11266 | #define ELF_TARGET_ID XTENSA_ELF_DATA |
e0001a05 | 11267 | #ifndef ELF_ARCH |
6d00b590 | 11268 | #define TARGET_LITTLE_SYM xtensa_elf32_le_vec |
e0001a05 | 11269 | #define TARGET_LITTLE_NAME "elf32-xtensa-le" |
6d00b590 | 11270 | #define TARGET_BIG_SYM xtensa_elf32_be_vec |
e0001a05 NC |
11271 | #define TARGET_BIG_NAME "elf32-xtensa-be" |
11272 | #define ELF_ARCH bfd_arch_xtensa | |
11273 | ||
4af0a1d8 BW |
11274 | #define ELF_MACHINE_CODE EM_XTENSA |
11275 | #define ELF_MACHINE_ALT1 EM_XTENSA_OLD | |
e0001a05 | 11276 | |
f7e16c2a | 11277 | #define ELF_MAXPAGESIZE 0x1000 |
e0001a05 NC |
11278 | #endif /* ELF_ARCH */ |
11279 | ||
11280 | #define elf_backend_can_gc_sections 1 | |
11281 | #define elf_backend_can_refcount 1 | |
11282 | #define elf_backend_plt_readonly 1 | |
11283 | #define elf_backend_got_header_size 4 | |
11284 | #define elf_backend_want_dynbss 0 | |
11285 | #define elf_backend_want_got_plt 1 | |
64f52338 | 11286 | #define elf_backend_dtrel_excludes_plt 1 |
e0001a05 NC |
11287 | |
11288 | #define elf_info_to_howto elf_xtensa_info_to_howto_rela | |
11289 | ||
28dbbc02 BW |
11290 | #define bfd_elf32_mkobject elf_xtensa_mkobject |
11291 | ||
e0001a05 NC |
11292 | #define bfd_elf32_bfd_merge_private_bfd_data elf_xtensa_merge_private_bfd_data |
11293 | #define bfd_elf32_new_section_hook elf_xtensa_new_section_hook | |
11294 | #define bfd_elf32_bfd_print_private_bfd_data elf_xtensa_print_private_bfd_data | |
11295 | #define bfd_elf32_bfd_relax_section elf_xtensa_relax_section | |
11296 | #define bfd_elf32_bfd_reloc_type_lookup elf_xtensa_reloc_type_lookup | |
157090f7 AM |
11297 | #define bfd_elf32_bfd_reloc_name_lookup \ |
11298 | elf_xtensa_reloc_name_lookup | |
e0001a05 | 11299 | #define bfd_elf32_bfd_set_private_flags elf_xtensa_set_private_flags |
f0e6fdb2 | 11300 | #define bfd_elf32_bfd_link_hash_table_create elf_xtensa_link_hash_table_create |
e0001a05 NC |
11301 | |
11302 | #define elf_backend_adjust_dynamic_symbol elf_xtensa_adjust_dynamic_symbol | |
11303 | #define elf_backend_check_relocs elf_xtensa_check_relocs | |
e0001a05 NC |
11304 | #define elf_backend_create_dynamic_sections elf_xtensa_create_dynamic_sections |
11305 | #define elf_backend_discard_info elf_xtensa_discard_info | |
11306 | #define elf_backend_ignore_discarded_relocs elf_xtensa_ignore_discarded_relocs | |
11307 | #define elf_backend_final_write_processing elf_xtensa_final_write_processing | |
11308 | #define elf_backend_finish_dynamic_sections elf_xtensa_finish_dynamic_sections | |
11309 | #define elf_backend_finish_dynamic_symbol elf_xtensa_finish_dynamic_symbol | |
11310 | #define elf_backend_gc_mark_hook elf_xtensa_gc_mark_hook | |
e0001a05 NC |
11311 | #define elf_backend_grok_prstatus elf_xtensa_grok_prstatus |
11312 | #define elf_backend_grok_psinfo elf_xtensa_grok_psinfo | |
95147441 | 11313 | #define elf_backend_hide_symbol elf_xtensa_hide_symbol |
e0001a05 NC |
11314 | #define elf_backend_object_p elf_xtensa_object_p |
11315 | #define elf_backend_reloc_type_class elf_xtensa_reloc_type_class | |
11316 | #define elf_backend_relocate_section elf_xtensa_relocate_section | |
11317 | #define elf_backend_size_dynamic_sections elf_xtensa_size_dynamic_sections | |
28dbbc02 | 11318 | #define elf_backend_always_size_sections elf_xtensa_always_size_sections |
d00dd7dc | 11319 | #define elf_backend_omit_section_dynsym _bfd_elf_omit_section_dynsym_all |
29ef7005 | 11320 | #define elf_backend_special_sections elf_xtensa_special_sections |
a77dc2cc | 11321 | #define elf_backend_action_discarded elf_xtensa_action_discarded |
28dbbc02 | 11322 | #define elf_backend_copy_indirect_symbol elf_xtensa_copy_indirect_symbol |
e0001a05 NC |
11323 | |
11324 | #include "elf32-target.h" |