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252b5132 | 1 | /* SPARC-specific support for 64-bit ELF |
37fb6db1 ILT |
2 | Copyright (C) 1993, 95, 96, 97, 98, 99, 2000 |
3 | Free Software Foundation, Inc. | |
252b5132 RH |
4 | |
5 | This file is part of BFD, the Binary File Descriptor library. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program; if not, write to the Free Software | |
19 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
20 | ||
21 | #include "bfd.h" | |
22 | #include "sysdep.h" | |
23 | #include "libbfd.h" | |
24 | #include "elf-bfd.h" | |
25 | ||
26 | /* This is defined if one wants to build upward compatible binaries | |
27 | with the original sparc64-elf toolchain. The support is kept in for | |
28 | now but is turned off by default. dje 970930 */ | |
29 | /*#define SPARC64_OLD_RELOCS*/ | |
30 | ||
31 | #include "elf/sparc.h" | |
32 | ||
33 | /* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */ | |
34 | #define MINUS_ONE (~ (bfd_vma) 0) | |
35 | ||
587ff49e RH |
36 | static struct bfd_link_hash_table * sparc64_elf_bfd_link_hash_table_create |
37 | PARAMS((bfd *)); | |
252b5132 RH |
38 | static reloc_howto_type *sparc64_elf_reloc_type_lookup |
39 | PARAMS ((bfd *, bfd_reloc_code_real_type)); | |
40 | static void sparc64_elf_info_to_howto | |
41 | PARAMS ((bfd *, arelent *, Elf_Internal_Rela *)); | |
42 | ||
43 | static void sparc64_elf_build_plt | |
44 | PARAMS((bfd *, unsigned char *, int)); | |
45 | static bfd_vma sparc64_elf_plt_entry_offset | |
46 | PARAMS((int)); | |
47 | static bfd_vma sparc64_elf_plt_ptr_offset | |
48 | PARAMS((int, int)); | |
49 | ||
50 | static boolean sparc64_elf_check_relocs | |
51 | PARAMS((bfd *, struct bfd_link_info *, asection *sec, | |
52 | const Elf_Internal_Rela *)); | |
53 | static boolean sparc64_elf_adjust_dynamic_symbol | |
54 | PARAMS((struct bfd_link_info *, struct elf_link_hash_entry *)); | |
55 | static boolean sparc64_elf_size_dynamic_sections | |
56 | PARAMS((bfd *, struct bfd_link_info *)); | |
587ff49e RH |
57 | static int sparc64_elf_get_symbol_type |
58 | PARAMS (( Elf_Internal_Sym *, int)); | |
59 | static boolean sparc64_elf_add_symbol_hook | |
60 | PARAMS ((bfd *, struct bfd_link_info *, const Elf_Internal_Sym *, | |
61 | const char **, flagword *, asection **, bfd_vma *)); | |
62 | static void sparc64_elf_symbol_processing | |
63 | PARAMS ((bfd *, asymbol *)); | |
252b5132 RH |
64 | |
65 | static boolean sparc64_elf_merge_private_bfd_data | |
66 | PARAMS ((bfd *, bfd *)); | |
67 | ||
68 | static boolean sparc64_elf_relocate_section | |
69 | PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, | |
70 | Elf_Internal_Rela *, Elf_Internal_Sym *, asection **)); | |
71 | static boolean sparc64_elf_object_p PARAMS ((bfd *)); | |
f65054f7 RH |
72 | static long sparc64_elf_get_reloc_upper_bound PARAMS ((bfd *, asection *)); |
73 | static long sparc64_elf_get_dynamic_reloc_upper_bound PARAMS ((bfd *)); | |
74 | static boolean sparc64_elf_slurp_one_reloc_table | |
75 | PARAMS ((bfd *, asection *, Elf_Internal_Shdr *, asymbol **, boolean)); | |
76 | static boolean sparc64_elf_slurp_reloc_table | |
77 | PARAMS ((bfd *, asection *, asymbol **, boolean)); | |
78 | static long sparc64_elf_canonicalize_dynamic_reloc | |
79 | PARAMS ((bfd *, arelent **, asymbol **)); | |
80 | static void sparc64_elf_write_relocs PARAMS ((bfd *, asection *, PTR)); | |
252b5132 RH |
81 | \f |
82 | /* The relocation "howto" table. */ | |
83 | ||
84 | static bfd_reloc_status_type sparc_elf_notsup_reloc | |
85 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); | |
86 | static bfd_reloc_status_type sparc_elf_wdisp16_reloc | |
87 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); | |
88 | static bfd_reloc_status_type sparc_elf_hix22_reloc | |
89 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); | |
90 | static bfd_reloc_status_type sparc_elf_lox10_reloc | |
91 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); | |
92 | ||
93 | static reloc_howto_type sparc64_elf_howto_table[] = | |
94 | { | |
95 | HOWTO(R_SPARC_NONE, 0,0, 0,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_NONE", false,0,0x00000000,true), | |
96 | HOWTO(R_SPARC_8, 0,0, 8,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_8", false,0,0x000000ff,true), | |
97 | HOWTO(R_SPARC_16, 0,1,16,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_16", false,0,0x0000ffff,true), | |
98 | HOWTO(R_SPARC_32, 0,2,32,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_32", false,0,0xffffffff,true), | |
99 | HOWTO(R_SPARC_DISP8, 0,0, 8,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_DISP8", false,0,0x000000ff,true), | |
100 | HOWTO(R_SPARC_DISP16, 0,1,16,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_DISP16", false,0,0x0000ffff,true), | |
101 | HOWTO(R_SPARC_DISP32, 0,2,32,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_DISP32", false,0,0x00ffffff,true), | |
102 | HOWTO(R_SPARC_WDISP30, 2,2,30,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_WDISP30", false,0,0x3fffffff,true), | |
103 | HOWTO(R_SPARC_WDISP22, 2,2,22,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_WDISP22", false,0,0x003fffff,true), | |
104 | HOWTO(R_SPARC_HI22, 10,2,22,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_HI22", false,0,0x003fffff,true), | |
105 | HOWTO(R_SPARC_22, 0,2,22,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_22", false,0,0x003fffff,true), | |
106 | HOWTO(R_SPARC_13, 0,2,13,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_13", false,0,0x00001fff,true), | |
107 | HOWTO(R_SPARC_LO10, 0,2,10,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_LO10", false,0,0x000003ff,true), | |
108 | HOWTO(R_SPARC_GOT10, 0,2,10,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_GOT10", false,0,0x000003ff,true), | |
109 | HOWTO(R_SPARC_GOT13, 0,2,13,false,0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_GOT13", false,0,0x00001fff,true), | |
110 | HOWTO(R_SPARC_GOT22, 10,2,22,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_GOT22", false,0,0x003fffff,true), | |
111 | HOWTO(R_SPARC_PC10, 0,2,10,true, 0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_PC10", false,0,0x000003ff,true), | |
112 | HOWTO(R_SPARC_PC22, 10,2,22,true, 0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_PC22", false,0,0x003fffff,true), | |
113 | HOWTO(R_SPARC_WPLT30, 2,2,30,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_WPLT30", false,0,0x3fffffff,true), | |
114 | HOWTO(R_SPARC_COPY, 0,0,00,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_COPY", false,0,0x00000000,true), | |
115 | HOWTO(R_SPARC_GLOB_DAT, 0,0,00,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_GLOB_DAT",false,0,0x00000000,true), | |
116 | HOWTO(R_SPARC_JMP_SLOT, 0,0,00,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_JMP_SLOT",false,0,0x00000000,true), | |
117 | HOWTO(R_SPARC_RELATIVE, 0,0,00,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_RELATIVE",false,0,0x00000000,true), | |
118 | HOWTO(R_SPARC_UA32, 0,0,00,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_UA32", false,0,0x00000000,true), | |
119 | #ifndef SPARC64_OLD_RELOCS | |
120 | /* These aren't implemented yet. */ | |
121 | HOWTO(R_SPARC_PLT32, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsup_reloc, "R_SPARC_PLT32", false,0,0x00000000,true), | |
122 | HOWTO(R_SPARC_HIPLT22, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsup_reloc, "R_SPARC_HIPLT22", false,0,0x00000000,true), | |
123 | HOWTO(R_SPARC_LOPLT10, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsup_reloc, "R_SPARC_LOPLT10", false,0,0x00000000,true), | |
124 | HOWTO(R_SPARC_PCPLT32, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsup_reloc, "R_SPARC_PCPLT32", false,0,0x00000000,true), | |
125 | HOWTO(R_SPARC_PCPLT22, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsup_reloc, "R_SPARC_PCPLT22", false,0,0x00000000,true), | |
126 | HOWTO(R_SPARC_PCPLT10, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsup_reloc, "R_SPARC_PCPLT10", false,0,0x00000000,true), | |
127 | #endif | |
128 | HOWTO(R_SPARC_10, 0,2,10,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_10", false,0,0x000003ff,true), | |
129 | HOWTO(R_SPARC_11, 0,2,11,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_11", false,0,0x000007ff,true), | |
130 | HOWTO(R_SPARC_64, 0,4,64,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_64", false,0,MINUS_ONE, true), | |
131 | HOWTO(R_SPARC_OLO10, 0,2,13,false,0,complain_overflow_signed, sparc_elf_notsup_reloc, "R_SPARC_OLO10", false,0,0x00001fff,true), | |
132 | HOWTO(R_SPARC_HH22, 42,2,22,false,0,complain_overflow_unsigned,bfd_elf_generic_reloc, "R_SPARC_HH22", false,0,0x003fffff,true), | |
133 | HOWTO(R_SPARC_HM10, 32,2,10,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_HM10", false,0,0x000003ff,true), | |
134 | HOWTO(R_SPARC_LM22, 10,2,22,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_LM22", false,0,0x003fffff,true), | |
135 | HOWTO(R_SPARC_PC_HH22, 42,2,22,true, 0,complain_overflow_unsigned,bfd_elf_generic_reloc, "R_SPARC_PC_HH22", false,0,0x003fffff,true), | |
136 | HOWTO(R_SPARC_PC_HM10, 32,2,10,true, 0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_PC_HM10", false,0,0x000003ff,true), | |
137 | HOWTO(R_SPARC_PC_LM22, 10,2,22,true, 0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_PC_LM22", false,0,0x003fffff,true), | |
138 | HOWTO(R_SPARC_WDISP16, 2,2,16,true, 0,complain_overflow_signed, sparc_elf_wdisp16_reloc,"R_SPARC_WDISP16", false,0,0x00000000,true), | |
139 | HOWTO(R_SPARC_WDISP19, 2,2,19,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_WDISP19", false,0,0x0007ffff,true), | |
140 | HOWTO(R_SPARC_UNUSED_42, 0,0, 0,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_UNUSED_42",false,0,0x00000000,true), | |
141 | HOWTO(R_SPARC_7, 0,2, 7,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_7", false,0,0x0000007f,true), | |
142 | HOWTO(R_SPARC_5, 0,2, 5,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_5", false,0,0x0000001f,true), | |
143 | HOWTO(R_SPARC_6, 0,2, 6,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_6", false,0,0x0000003f,true), | |
144 | HOWTO(R_SPARC_DISP64, 0,4,64,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_DISP64", false,0,MINUS_ONE, true), | |
145 | HOWTO(R_SPARC_PLT64, 0,4,64,false,0,complain_overflow_bitfield,sparc_elf_notsup_reloc, "R_SPARC_PLT64", false,0,MINUS_ONE, false), | |
146 | HOWTO(R_SPARC_HIX22, 0,4, 0,false,0,complain_overflow_bitfield,sparc_elf_hix22_reloc, "R_SPARC_HIX22", false,0,MINUS_ONE, false), | |
147 | HOWTO(R_SPARC_LOX10, 0,4, 0,false,0,complain_overflow_dont, sparc_elf_lox10_reloc, "R_SPARC_LOX10", false,0,MINUS_ONE, false), | |
148 | HOWTO(R_SPARC_H44, 22,2,22,false,0,complain_overflow_unsigned,bfd_elf_generic_reloc, "R_SPARC_H44", false,0,0x003fffff,false), | |
149 | HOWTO(R_SPARC_M44, 12,2,10,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_M44", false,0,0x000003ff,false), | |
150 | HOWTO(R_SPARC_L44, 0,2,13,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_L44", false,0,0x00000fff,false), | |
151 | HOWTO(R_SPARC_REGISTER, 0,4, 0,false,0,complain_overflow_bitfield,sparc_elf_notsup_reloc, "R_SPARC_REGISTER",false,0,MINUS_ONE, false), | |
152 | HOWTO(R_SPARC_UA64, 0,4,64,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_UA64", false,0,MINUS_ONE, true), | |
153 | HOWTO(R_SPARC_UA16, 0,1,16,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_UA16", false,0,0x0000ffff,true) | |
154 | }; | |
155 | ||
156 | struct elf_reloc_map { | |
157 | bfd_reloc_code_real_type bfd_reloc_val; | |
158 | unsigned char elf_reloc_val; | |
159 | }; | |
160 | ||
161 | static CONST struct elf_reloc_map sparc_reloc_map[] = | |
162 | { | |
163 | { BFD_RELOC_NONE, R_SPARC_NONE, }, | |
164 | { BFD_RELOC_16, R_SPARC_16, }, | |
165 | { BFD_RELOC_8, R_SPARC_8 }, | |
166 | { BFD_RELOC_8_PCREL, R_SPARC_DISP8 }, | |
167 | { BFD_RELOC_CTOR, R_SPARC_64 }, | |
168 | { BFD_RELOC_32, R_SPARC_32 }, | |
169 | { BFD_RELOC_32_PCREL, R_SPARC_DISP32 }, | |
170 | { BFD_RELOC_HI22, R_SPARC_HI22 }, | |
171 | { BFD_RELOC_LO10, R_SPARC_LO10, }, | |
172 | { BFD_RELOC_32_PCREL_S2, R_SPARC_WDISP30 }, | |
173 | { BFD_RELOC_SPARC22, R_SPARC_22 }, | |
174 | { BFD_RELOC_SPARC13, R_SPARC_13 }, | |
175 | { BFD_RELOC_SPARC_GOT10, R_SPARC_GOT10 }, | |
176 | { BFD_RELOC_SPARC_GOT13, R_SPARC_GOT13 }, | |
177 | { BFD_RELOC_SPARC_GOT22, R_SPARC_GOT22 }, | |
178 | { BFD_RELOC_SPARC_PC10, R_SPARC_PC10 }, | |
179 | { BFD_RELOC_SPARC_PC22, R_SPARC_PC22 }, | |
180 | { BFD_RELOC_SPARC_WPLT30, R_SPARC_WPLT30 }, | |
181 | { BFD_RELOC_SPARC_COPY, R_SPARC_COPY }, | |
182 | { BFD_RELOC_SPARC_GLOB_DAT, R_SPARC_GLOB_DAT }, | |
183 | { BFD_RELOC_SPARC_JMP_SLOT, R_SPARC_JMP_SLOT }, | |
184 | { BFD_RELOC_SPARC_RELATIVE, R_SPARC_RELATIVE }, | |
185 | { BFD_RELOC_SPARC_WDISP22, R_SPARC_WDISP22 }, | |
186 | /* ??? Doesn't dwarf use this? */ | |
187 | /*{ BFD_RELOC_SPARC_UA32, R_SPARC_UA32 }, not used?? */ | |
188 | {BFD_RELOC_SPARC_10, R_SPARC_10}, | |
189 | {BFD_RELOC_SPARC_11, R_SPARC_11}, | |
190 | {BFD_RELOC_SPARC_64, R_SPARC_64}, | |
191 | {BFD_RELOC_SPARC_OLO10, R_SPARC_OLO10}, | |
192 | {BFD_RELOC_SPARC_HH22, R_SPARC_HH22}, | |
193 | {BFD_RELOC_SPARC_HM10, R_SPARC_HM10}, | |
194 | {BFD_RELOC_SPARC_LM22, R_SPARC_LM22}, | |
195 | {BFD_RELOC_SPARC_PC_HH22, R_SPARC_PC_HH22}, | |
196 | {BFD_RELOC_SPARC_PC_HM10, R_SPARC_PC_HM10}, | |
197 | {BFD_RELOC_SPARC_PC_LM22, R_SPARC_PC_LM22}, | |
198 | {BFD_RELOC_SPARC_WDISP16, R_SPARC_WDISP16}, | |
199 | {BFD_RELOC_SPARC_WDISP19, R_SPARC_WDISP19}, | |
200 | {BFD_RELOC_SPARC_7, R_SPARC_7}, | |
201 | {BFD_RELOC_SPARC_5, R_SPARC_5}, | |
202 | {BFD_RELOC_SPARC_6, R_SPARC_6}, | |
203 | {BFD_RELOC_SPARC_DISP64, R_SPARC_DISP64}, | |
204 | {BFD_RELOC_SPARC_PLT64, R_SPARC_PLT64}, | |
205 | {BFD_RELOC_SPARC_HIX22, R_SPARC_HIX22}, | |
206 | {BFD_RELOC_SPARC_LOX10, R_SPARC_LOX10}, | |
207 | {BFD_RELOC_SPARC_H44, R_SPARC_H44}, | |
208 | {BFD_RELOC_SPARC_M44, R_SPARC_M44}, | |
209 | {BFD_RELOC_SPARC_L44, R_SPARC_L44}, | |
210 | {BFD_RELOC_SPARC_REGISTER, R_SPARC_REGISTER} | |
211 | }; | |
212 | ||
213 | static reloc_howto_type * | |
214 | sparc64_elf_reloc_type_lookup (abfd, code) | |
215 | bfd *abfd; | |
216 | bfd_reloc_code_real_type code; | |
217 | { | |
218 | unsigned int i; | |
219 | for (i = 0; i < sizeof (sparc_reloc_map) / sizeof (struct elf_reloc_map); i++) | |
220 | { | |
221 | if (sparc_reloc_map[i].bfd_reloc_val == code) | |
222 | return &sparc64_elf_howto_table[(int) sparc_reloc_map[i].elf_reloc_val]; | |
223 | } | |
224 | return 0; | |
225 | } | |
226 | ||
227 | static void | |
228 | sparc64_elf_info_to_howto (abfd, cache_ptr, dst) | |
229 | bfd *abfd; | |
230 | arelent *cache_ptr; | |
231 | Elf64_Internal_Rela *dst; | |
232 | { | |
f65054f7 RH |
233 | BFD_ASSERT (ELF64_R_TYPE_ID (dst->r_info) < (unsigned int) R_SPARC_max_std); |
234 | cache_ptr->howto = &sparc64_elf_howto_table[ELF64_R_TYPE_ID (dst->r_info)]; | |
235 | } | |
236 | \f | |
237 | /* Due to the way how we handle R_SPARC_OLO10, each entry in a SHT_RELA | |
238 | section can represent up to two relocs, we must tell the user to allocate | |
239 | more space. */ | |
240 | ||
241 | static long | |
242 | sparc64_elf_get_reloc_upper_bound (abfd, sec) | |
243 | bfd *abfd; | |
244 | asection *sec; | |
245 | { | |
246 | return (sec->reloc_count * 2 + 1) * sizeof (arelent *); | |
247 | } | |
248 | ||
249 | static long | |
250 | sparc64_elf_get_dynamic_reloc_upper_bound (abfd) | |
251 | bfd *abfd; | |
252 | { | |
253 | return _bfd_elf_get_dynamic_reloc_upper_bound (abfd) * 2; | |
254 | } | |
255 | ||
256 | /* Read relocations for ASECT from REL_HDR. There are RELOC_COUNT of | |
257 | them. We cannot use generic elf routines for this, because R_SPARC_OLO10 | |
258 | has secondary addend in ELF64_R_TYPE_DATA. We handle it as two relocations | |
259 | for the same location, R_SPARC_LO10 and R_SPARC_13. */ | |
260 | ||
261 | static boolean | |
262 | sparc64_elf_slurp_one_reloc_table (abfd, asect, rel_hdr, symbols, dynamic) | |
263 | bfd *abfd; | |
264 | asection *asect; | |
265 | Elf_Internal_Shdr *rel_hdr; | |
266 | asymbol **symbols; | |
267 | boolean dynamic; | |
268 | { | |
269 | struct elf_backend_data * const ebd = get_elf_backend_data (abfd); | |
270 | PTR allocated = NULL; | |
271 | bfd_byte *native_relocs; | |
272 | arelent *relent; | |
273 | unsigned int i; | |
274 | int entsize; | |
275 | bfd_size_type count; | |
276 | arelent *relents; | |
277 | ||
278 | allocated = (PTR) bfd_malloc ((size_t) rel_hdr->sh_size); | |
279 | if (allocated == NULL) | |
280 | goto error_return; | |
281 | ||
282 | if (bfd_seek (abfd, rel_hdr->sh_offset, SEEK_SET) != 0 | |
283 | || (bfd_read (allocated, 1, rel_hdr->sh_size, abfd) | |
284 | != rel_hdr->sh_size)) | |
285 | goto error_return; | |
286 | ||
287 | native_relocs = (bfd_byte *) allocated; | |
288 | ||
289 | relents = asect->relocation + asect->reloc_count; | |
290 | ||
291 | entsize = rel_hdr->sh_entsize; | |
292 | BFD_ASSERT (entsize == sizeof (Elf64_External_Rela)); | |
293 | ||
294 | count = rel_hdr->sh_size / entsize; | |
295 | ||
296 | for (i = 0, relent = relents; i < count; | |
297 | i++, relent++, native_relocs += entsize) | |
298 | { | |
299 | Elf_Internal_Rela rela; | |
300 | ||
301 | bfd_elf64_swap_reloca_in (abfd, (Elf64_External_Rela *) native_relocs, &rela); | |
302 | ||
303 | /* The address of an ELF reloc is section relative for an object | |
304 | file, and absolute for an executable file or shared library. | |
305 | The address of a normal BFD reloc is always section relative, | |
306 | and the address of a dynamic reloc is absolute.. */ | |
307 | if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0 || dynamic) | |
308 | relent->address = rela.r_offset; | |
309 | else | |
310 | relent->address = rela.r_offset - asect->vma; | |
311 | ||
312 | if (ELF64_R_SYM (rela.r_info) == 0) | |
313 | relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; | |
314 | else | |
315 | { | |
316 | asymbol **ps, *s; | |
317 | ||
318 | ps = symbols + ELF64_R_SYM (rela.r_info) - 1; | |
319 | s = *ps; | |
320 | ||
321 | /* Canonicalize ELF section symbols. FIXME: Why? */ | |
322 | if ((s->flags & BSF_SECTION_SYM) == 0) | |
323 | relent->sym_ptr_ptr = ps; | |
324 | else | |
325 | relent->sym_ptr_ptr = s->section->symbol_ptr_ptr; | |
326 | } | |
327 | ||
328 | relent->addend = rela.r_addend; | |
329 | ||
330 | BFD_ASSERT (ELF64_R_TYPE_ID (rela.r_info) < (unsigned int) R_SPARC_max_std); | |
331 | if (ELF64_R_TYPE_ID (rela.r_info) == R_SPARC_OLO10) | |
332 | { | |
333 | relent->howto = &sparc64_elf_howto_table[R_SPARC_LO10]; | |
334 | relent[1].address = relent->address; | |
335 | relent++; | |
336 | relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; | |
337 | relent->addend = ELF64_R_TYPE_DATA (rela.r_info); | |
338 | relent->howto = &sparc64_elf_howto_table[R_SPARC_13]; | |
339 | } | |
340 | else | |
341 | relent->howto = &sparc64_elf_howto_table[ELF64_R_TYPE_ID (rela.r_info)]; | |
342 | } | |
343 | ||
344 | asect->reloc_count += relent - relents; | |
345 | ||
346 | if (allocated != NULL) | |
347 | free (allocated); | |
348 | ||
349 | return true; | |
350 | ||
351 | error_return: | |
352 | if (allocated != NULL) | |
353 | free (allocated); | |
354 | return false; | |
355 | } | |
356 | ||
357 | /* Read in and swap the external relocs. */ | |
358 | ||
359 | static boolean | |
360 | sparc64_elf_slurp_reloc_table (abfd, asect, symbols, dynamic) | |
361 | bfd *abfd; | |
362 | asection *asect; | |
363 | asymbol **symbols; | |
364 | boolean dynamic; | |
365 | { | |
366 | struct bfd_elf_section_data * const d = elf_section_data (asect); | |
367 | Elf_Internal_Shdr *rel_hdr; | |
368 | Elf_Internal_Shdr *rel_hdr2; | |
369 | ||
370 | if (asect->relocation != NULL) | |
371 | return true; | |
372 | ||
373 | if (! dynamic) | |
374 | { | |
375 | if ((asect->flags & SEC_RELOC) == 0 | |
376 | || asect->reloc_count == 0) | |
377 | return true; | |
378 | ||
379 | rel_hdr = &d->rel_hdr; | |
380 | rel_hdr2 = d->rel_hdr2; | |
381 | ||
382 | BFD_ASSERT (asect->rel_filepos == rel_hdr->sh_offset | |
383 | || (rel_hdr2 && asect->rel_filepos == rel_hdr2->sh_offset)); | |
384 | } | |
385 | else | |
386 | { | |
387 | /* Note that ASECT->RELOC_COUNT tends not to be accurate in this | |
388 | case because relocations against this section may use the | |
389 | dynamic symbol table, and in that case bfd_section_from_shdr | |
390 | in elf.c does not update the RELOC_COUNT. */ | |
391 | if (asect->_raw_size == 0) | |
392 | return true; | |
393 | ||
394 | rel_hdr = &d->this_hdr; | |
395 | asect->reloc_count = rel_hdr->sh_size / rel_hdr->sh_entsize; | |
396 | rel_hdr2 = NULL; | |
397 | } | |
398 | ||
399 | asect->relocation = ((arelent *) | |
400 | bfd_alloc (abfd, | |
401 | asect->reloc_count * 2 * sizeof (arelent))); | |
402 | if (asect->relocation == NULL) | |
403 | return false; | |
404 | ||
405 | /* The sparc64_elf_slurp_one_reloc_table routine increments reloc_count. */ | |
406 | asect->reloc_count = 0; | |
407 | ||
408 | if (!sparc64_elf_slurp_one_reloc_table (abfd, asect, rel_hdr, symbols, | |
409 | dynamic)) | |
410 | return false; | |
411 | ||
412 | if (rel_hdr2 | |
413 | && !sparc64_elf_slurp_one_reloc_table (abfd, asect, rel_hdr2, symbols, | |
414 | dynamic)) | |
415 | return false; | |
416 | ||
417 | return true; | |
418 | } | |
419 | ||
420 | /* Canonicalize the dynamic relocation entries. Note that we return | |
421 | the dynamic relocations as a single block, although they are | |
422 | actually associated with particular sections; the interface, which | |
423 | was designed for SunOS style shared libraries, expects that there | |
424 | is only one set of dynamic relocs. Any section that was actually | |
425 | installed in the BFD, and has type SHT_REL or SHT_RELA, and uses | |
426 | the dynamic symbol table, is considered to be a dynamic reloc | |
427 | section. */ | |
428 | ||
429 | static long | |
430 | sparc64_elf_canonicalize_dynamic_reloc (abfd, storage, syms) | |
431 | bfd *abfd; | |
432 | arelent **storage; | |
433 | asymbol **syms; | |
434 | { | |
435 | asection *s; | |
436 | long ret; | |
437 | ||
438 | if (elf_dynsymtab (abfd) == 0) | |
439 | { | |
440 | bfd_set_error (bfd_error_invalid_operation); | |
441 | return -1; | |
442 | } | |
443 | ||
444 | ret = 0; | |
445 | for (s = abfd->sections; s != NULL; s = s->next) | |
446 | { | |
447 | if (elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd) | |
448 | && (elf_section_data (s)->this_hdr.sh_type == SHT_RELA)) | |
449 | { | |
450 | arelent *p; | |
451 | long count, i; | |
452 | ||
453 | if (! sparc64_elf_slurp_reloc_table (abfd, s, syms, true)) | |
454 | return -1; | |
455 | count = s->reloc_count; | |
456 | p = s->relocation; | |
457 | for (i = 0; i < count; i++) | |
458 | *storage++ = p++; | |
459 | ret += count; | |
460 | } | |
461 | } | |
462 | ||
463 | *storage = NULL; | |
464 | ||
465 | return ret; | |
466 | } | |
467 | ||
468 | /* Write out the relocs. */ | |
469 | ||
470 | static void | |
471 | sparc64_elf_write_relocs (abfd, sec, data) | |
472 | bfd *abfd; | |
473 | asection *sec; | |
474 | PTR data; | |
475 | { | |
476 | boolean *failedp = (boolean *) data; | |
477 | Elf_Internal_Shdr *rela_hdr; | |
37fb6db1 | 478 | Elf64_External_Rela *outbound_relocas, *src_rela; |
f65054f7 RH |
479 | unsigned int idx, count; |
480 | asymbol *last_sym = 0; | |
481 | int last_sym_idx = 0; | |
482 | ||
483 | /* If we have already failed, don't do anything. */ | |
484 | if (*failedp) | |
485 | return; | |
486 | ||
487 | if ((sec->flags & SEC_RELOC) == 0) | |
488 | return; | |
489 | ||
490 | /* The linker backend writes the relocs out itself, and sets the | |
491 | reloc_count field to zero to inhibit writing them here. Also, | |
492 | sometimes the SEC_RELOC flag gets set even when there aren't any | |
493 | relocs. */ | |
494 | if (sec->reloc_count == 0) | |
495 | return; | |
496 | ||
497 | /* We can combine two relocs that refer to the same address | |
498 | into R_SPARC_OLO10 if first one is R_SPARC_LO10 and the | |
499 | latter is R_SPARC_13 with no associated symbol. */ | |
500 | count = 0; | |
501 | for (idx = 0; idx < sec->reloc_count; idx++) | |
502 | { | |
503 | bfd_vma addr; | |
504 | unsigned int i; | |
505 | ||
506 | ++count; | |
507 | ||
508 | addr = sec->orelocation[idx]->address; | |
509 | if (sec->orelocation[idx]->howto->type == R_SPARC_LO10 | |
510 | && idx < sec->reloc_count - 1) | |
511 | { | |
512 | arelent *r = sec->orelocation[idx + 1]; | |
513 | ||
514 | if (r->howto->type == R_SPARC_13 | |
515 | && r->address == addr | |
516 | && bfd_is_abs_section ((*r->sym_ptr_ptr)->section) | |
517 | && (*r->sym_ptr_ptr)->value == 0) | |
518 | ++idx; | |
519 | } | |
520 | } | |
521 | ||
522 | rela_hdr = &elf_section_data (sec)->rel_hdr; | |
523 | ||
524 | rela_hdr->sh_size = rela_hdr->sh_entsize * count; | |
525 | rela_hdr->contents = (PTR) bfd_alloc (abfd, rela_hdr->sh_size); | |
526 | if (rela_hdr->contents == NULL) | |
527 | { | |
528 | *failedp = true; | |
529 | return; | |
530 | } | |
531 | ||
532 | /* Figure out whether the relocations are RELA or REL relocations. */ | |
533 | if (rela_hdr->sh_type != SHT_RELA) | |
534 | abort (); | |
535 | ||
536 | /* orelocation has the data, reloc_count has the count... */ | |
537 | outbound_relocas = (Elf64_External_Rela *) rela_hdr->contents; | |
37fb6db1 | 538 | src_rela = outbound_relocas; |
f65054f7 RH |
539 | |
540 | for (idx = 0; idx < sec->reloc_count; idx++) | |
541 | { | |
542 | Elf_Internal_Rela dst_rela; | |
f65054f7 RH |
543 | arelent *ptr; |
544 | asymbol *sym; | |
545 | int n; | |
546 | ||
547 | ptr = sec->orelocation[idx]; | |
f65054f7 RH |
548 | |
549 | /* The address of an ELF reloc is section relative for an object | |
550 | file, and absolute for an executable file or shared library. | |
551 | The address of a BFD reloc is always section relative. */ | |
552 | if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0) | |
553 | dst_rela.r_offset = ptr->address; | |
554 | else | |
555 | dst_rela.r_offset = ptr->address + sec->vma; | |
556 | ||
557 | sym = *ptr->sym_ptr_ptr; | |
558 | if (sym == last_sym) | |
559 | n = last_sym_idx; | |
560 | else if (bfd_is_abs_section (sym->section) && sym->value == 0) | |
561 | n = STN_UNDEF; | |
562 | else | |
563 | { | |
564 | last_sym = sym; | |
565 | n = _bfd_elf_symbol_from_bfd_symbol (abfd, &sym); | |
566 | if (n < 0) | |
567 | { | |
568 | *failedp = true; | |
569 | return; | |
570 | } | |
571 | last_sym_idx = n; | |
572 | } | |
573 | ||
574 | if ((*ptr->sym_ptr_ptr)->the_bfd != NULL | |
575 | && (*ptr->sym_ptr_ptr)->the_bfd->xvec != abfd->xvec | |
576 | && ! _bfd_elf_validate_reloc (abfd, ptr)) | |
577 | { | |
578 | *failedp = true; | |
579 | return; | |
580 | } | |
581 | ||
582 | if (ptr->howto->type == R_SPARC_LO10 | |
583 | && idx < sec->reloc_count - 1) | |
584 | { | |
585 | arelent *r = sec->orelocation[idx + 1]; | |
586 | ||
587 | if (r->howto->type == R_SPARC_13 | |
588 | && r->address == ptr->address | |
589 | && bfd_is_abs_section ((*r->sym_ptr_ptr)->section) | |
590 | && (*r->sym_ptr_ptr)->value == 0) | |
591 | { | |
592 | idx++; | |
593 | dst_rela.r_info | |
594 | = ELF64_R_INFO (n, ELF64_R_TYPE_INFO (r->addend, | |
595 | R_SPARC_OLO10)); | |
596 | } | |
597 | else | |
598 | dst_rela.r_info = ELF64_R_INFO (n, R_SPARC_LO10); | |
599 | } | |
600 | else | |
601 | dst_rela.r_info = ELF64_R_INFO (n, ptr->howto->type); | |
602 | ||
603 | dst_rela.r_addend = ptr->addend; | |
604 | bfd_elf64_swap_reloca_out (abfd, &dst_rela, src_rela); | |
37fb6db1 | 605 | ++src_rela; |
f65054f7 | 606 | } |
252b5132 | 607 | } |
587ff49e RH |
608 | \f |
609 | /* Sparc64 ELF linker hash table. */ | |
610 | ||
611 | struct sparc64_elf_app_reg | |
612 | { | |
613 | unsigned char bind; | |
614 | unsigned short shndx; | |
615 | bfd *abfd; | |
616 | char *name; | |
617 | }; | |
618 | ||
619 | struct sparc64_elf_link_hash_table | |
620 | { | |
621 | struct elf_link_hash_table root; | |
622 | ||
623 | struct sparc64_elf_app_reg app_regs [4]; | |
624 | }; | |
625 | ||
626 | /* Get the Sparc64 ELF linker hash table from a link_info structure. */ | |
627 | ||
628 | #define sparc64_elf_hash_table(p) \ | |
629 | ((struct sparc64_elf_link_hash_table *) ((p)->hash)) | |
630 | ||
631 | /* Create a Sparc64 ELF linker hash table. */ | |
632 | ||
633 | static struct bfd_link_hash_table * | |
634 | sparc64_elf_bfd_link_hash_table_create (abfd) | |
635 | bfd *abfd; | |
636 | { | |
637 | struct sparc64_elf_link_hash_table *ret; | |
638 | ||
639 | ret = ((struct sparc64_elf_link_hash_table *) | |
640 | bfd_zalloc (abfd, sizeof (struct sparc64_elf_link_hash_table))); | |
641 | if (ret == (struct sparc64_elf_link_hash_table *) NULL) | |
642 | return NULL; | |
643 | ||
644 | if (! _bfd_elf_link_hash_table_init (&ret->root, abfd, | |
645 | _bfd_elf_link_hash_newfunc)) | |
646 | { | |
647 | bfd_release (abfd, ret); | |
648 | return NULL; | |
649 | } | |
650 | ||
651 | return &ret->root.root; | |
652 | } | |
653 | ||
252b5132 RH |
654 | \f |
655 | /* Utility for performing the standard initial work of an instruction | |
656 | relocation. | |
657 | *PRELOCATION will contain the relocated item. | |
658 | *PINSN will contain the instruction from the input stream. | |
659 | If the result is `bfd_reloc_other' the caller can continue with | |
660 | performing the relocation. Otherwise it must stop and return the | |
661 | value to its caller. */ | |
662 | ||
663 | static bfd_reloc_status_type | |
664 | init_insn_reloc (abfd, | |
665 | reloc_entry, | |
666 | symbol, | |
667 | data, | |
668 | input_section, | |
669 | output_bfd, | |
670 | prelocation, | |
671 | pinsn) | |
672 | bfd *abfd; | |
673 | arelent *reloc_entry; | |
674 | asymbol *symbol; | |
675 | PTR data; | |
676 | asection *input_section; | |
677 | bfd *output_bfd; | |
678 | bfd_vma *prelocation; | |
679 | bfd_vma *pinsn; | |
680 | { | |
681 | bfd_vma relocation; | |
682 | reloc_howto_type *howto = reloc_entry->howto; | |
683 | ||
684 | if (output_bfd != (bfd *) NULL | |
685 | && (symbol->flags & BSF_SECTION_SYM) == 0 | |
686 | && (! howto->partial_inplace | |
687 | || reloc_entry->addend == 0)) | |
688 | { | |
689 | reloc_entry->address += input_section->output_offset; | |
690 | return bfd_reloc_ok; | |
691 | } | |
692 | ||
693 | /* This works because partial_inplace == false. */ | |
694 | if (output_bfd != NULL) | |
695 | return bfd_reloc_continue; | |
696 | ||
697 | if (reloc_entry->address > input_section->_cooked_size) | |
698 | return bfd_reloc_outofrange; | |
699 | ||
700 | relocation = (symbol->value | |
701 | + symbol->section->output_section->vma | |
702 | + symbol->section->output_offset); | |
703 | relocation += reloc_entry->addend; | |
704 | if (howto->pc_relative) | |
705 | { | |
706 | relocation -= (input_section->output_section->vma | |
707 | + input_section->output_offset); | |
708 | relocation -= reloc_entry->address; | |
709 | } | |
710 | ||
711 | *prelocation = relocation; | |
712 | *pinsn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address); | |
713 | return bfd_reloc_other; | |
714 | } | |
715 | ||
716 | /* For unsupported relocs. */ | |
717 | ||
718 | static bfd_reloc_status_type | |
719 | sparc_elf_notsup_reloc (abfd, | |
720 | reloc_entry, | |
721 | symbol, | |
722 | data, | |
723 | input_section, | |
724 | output_bfd, | |
725 | error_message) | |
726 | bfd *abfd; | |
727 | arelent *reloc_entry; | |
728 | asymbol *symbol; | |
729 | PTR data; | |
730 | asection *input_section; | |
731 | bfd *output_bfd; | |
732 | char **error_message; | |
733 | { | |
734 | return bfd_reloc_notsupported; | |
735 | } | |
736 | ||
737 | /* Handle the WDISP16 reloc. */ | |
738 | ||
739 | static bfd_reloc_status_type | |
740 | sparc_elf_wdisp16_reloc (abfd, reloc_entry, symbol, data, input_section, | |
741 | output_bfd, error_message) | |
742 | bfd *abfd; | |
743 | arelent *reloc_entry; | |
744 | asymbol *symbol; | |
745 | PTR data; | |
746 | asection *input_section; | |
747 | bfd *output_bfd; | |
748 | char **error_message; | |
749 | { | |
750 | bfd_vma relocation; | |
751 | bfd_vma insn; | |
752 | bfd_reloc_status_type status; | |
753 | ||
754 | status = init_insn_reloc (abfd, reloc_entry, symbol, data, | |
755 | input_section, output_bfd, &relocation, &insn); | |
756 | if (status != bfd_reloc_other) | |
757 | return status; | |
758 | ||
759 | insn = (insn & ~0x303fff) | ((((relocation >> 2) & 0xc000) << 6) | |
760 | | ((relocation >> 2) & 0x3fff)); | |
761 | bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address); | |
762 | ||
763 | if ((bfd_signed_vma) relocation < - 0x40000 | |
764 | || (bfd_signed_vma) relocation > 0x3ffff) | |
765 | return bfd_reloc_overflow; | |
766 | else | |
767 | return bfd_reloc_ok; | |
768 | } | |
769 | ||
770 | /* Handle the HIX22 reloc. */ | |
771 | ||
772 | static bfd_reloc_status_type | |
773 | sparc_elf_hix22_reloc (abfd, | |
774 | reloc_entry, | |
775 | symbol, | |
776 | data, | |
777 | input_section, | |
778 | output_bfd, | |
779 | error_message) | |
780 | bfd *abfd; | |
781 | arelent *reloc_entry; | |
782 | asymbol *symbol; | |
783 | PTR data; | |
784 | asection *input_section; | |
785 | bfd *output_bfd; | |
786 | char **error_message; | |
787 | { | |
788 | bfd_vma relocation; | |
789 | bfd_vma insn; | |
790 | bfd_reloc_status_type status; | |
791 | ||
792 | status = init_insn_reloc (abfd, reloc_entry, symbol, data, | |
793 | input_section, output_bfd, &relocation, &insn); | |
794 | if (status != bfd_reloc_other) | |
795 | return status; | |
796 | ||
797 | relocation ^= MINUS_ONE; | |
798 | insn = (insn & ~0x3fffff) | ((relocation >> 10) & 0x3fffff); | |
799 | bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address); | |
800 | ||
801 | if ((relocation & ~ (bfd_vma) 0xffffffff) != 0) | |
802 | return bfd_reloc_overflow; | |
803 | else | |
804 | return bfd_reloc_ok; | |
805 | } | |
806 | ||
807 | /* Handle the LOX10 reloc. */ | |
808 | ||
809 | static bfd_reloc_status_type | |
810 | sparc_elf_lox10_reloc (abfd, | |
811 | reloc_entry, | |
812 | symbol, | |
813 | data, | |
814 | input_section, | |
815 | output_bfd, | |
816 | error_message) | |
817 | bfd *abfd; | |
818 | arelent *reloc_entry; | |
819 | asymbol *symbol; | |
820 | PTR data; | |
821 | asection *input_section; | |
822 | bfd *output_bfd; | |
823 | char **error_message; | |
824 | { | |
825 | bfd_vma relocation; | |
826 | bfd_vma insn; | |
827 | bfd_reloc_status_type status; | |
828 | ||
829 | status = init_insn_reloc (abfd, reloc_entry, symbol, data, | |
830 | input_section, output_bfd, &relocation, &insn); | |
831 | if (status != bfd_reloc_other) | |
832 | return status; | |
833 | ||
834 | insn = (insn & ~0x1fff) | 0x1c00 | (relocation & 0x3ff); | |
835 | bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address); | |
836 | ||
837 | return bfd_reloc_ok; | |
838 | } | |
839 | \f | |
840 | /* PLT/GOT stuff */ | |
841 | ||
842 | /* Both the headers and the entries are icache aligned. */ | |
843 | #define PLT_ENTRY_SIZE 32 | |
844 | #define PLT_HEADER_SIZE (4 * PLT_ENTRY_SIZE) | |
845 | #define LARGE_PLT_THRESHOLD 32768 | |
846 | #define GOT_RESERVED_ENTRIES 1 | |
847 | ||
848 | #define ELF_DYNAMIC_INTERPRETER "/usr/lib/sparcv9/ld.so.1" | |
849 | ||
850 | ||
851 | /* Fill in the .plt section. */ | |
852 | ||
853 | static void | |
854 | sparc64_elf_build_plt (output_bfd, contents, nentries) | |
855 | bfd *output_bfd; | |
856 | unsigned char *contents; | |
857 | int nentries; | |
858 | { | |
859 | const unsigned int nop = 0x01000000; | |
860 | int i, j; | |
861 | ||
862 | /* The first four entries are reserved, and are initially undefined. | |
863 | We fill them with `illtrap 0' to force ld.so to do something. */ | |
864 | ||
865 | for (i = 0; i < PLT_HEADER_SIZE/4; ++i) | |
866 | bfd_put_32 (output_bfd, 0, contents+i*4); | |
867 | ||
868 | /* The first 32768 entries are close enough to plt1 to get there via | |
869 | a straight branch. */ | |
870 | ||
871 | for (i = 4; i < LARGE_PLT_THRESHOLD && i < nentries; ++i) | |
872 | { | |
873 | unsigned char *entry = contents + i * PLT_ENTRY_SIZE; | |
874 | unsigned int sethi, ba; | |
875 | ||
876 | /* sethi (. - plt0), %g1 */ | |
877 | sethi = 0x03000000 | (i * PLT_ENTRY_SIZE); | |
878 | ||
a11c78e7 RH |
879 | /* ba,a,pt %xcc, plt1 */ |
880 | ba = 0x30680000 | (((contents+PLT_ENTRY_SIZE) - (entry+4)) / 4 & 0x7ffff); | |
252b5132 RH |
881 | |
882 | bfd_put_32 (output_bfd, sethi, entry); | |
883 | bfd_put_32 (output_bfd, ba, entry+4); | |
884 | bfd_put_32 (output_bfd, nop, entry+8); | |
885 | bfd_put_32 (output_bfd, nop, entry+12); | |
886 | bfd_put_32 (output_bfd, nop, entry+16); | |
887 | bfd_put_32 (output_bfd, nop, entry+20); | |
888 | bfd_put_32 (output_bfd, nop, entry+24); | |
889 | bfd_put_32 (output_bfd, nop, entry+28); | |
890 | } | |
891 | ||
892 | /* Now the tricky bit. Entries 32768 and higher are grouped in blocks of | |
893 | 160: 160 entries and 160 pointers. This is to separate code from data, | |
894 | which is much friendlier on the cache. */ | |
895 | ||
896 | for (; i < nentries; i += 160) | |
897 | { | |
898 | int block = (i + 160 <= nentries ? 160 : nentries - i); | |
899 | for (j = 0; j < block; ++j) | |
900 | { | |
901 | unsigned char *entry, *ptr; | |
902 | unsigned int ldx; | |
903 | ||
904 | entry = contents + i*PLT_ENTRY_SIZE + j*4*6; | |
905 | ptr = contents + i*PLT_ENTRY_SIZE + block*4*6 + j*8; | |
906 | ||
907 | /* ldx [%o7 + ptr - entry+4], %g1 */ | |
908 | ldx = 0xc25be000 | ((ptr - entry+4) & 0x1fff); | |
909 | ||
910 | bfd_put_32 (output_bfd, 0x8a10000f, entry); /* mov %o7,%g5 */ | |
911 | bfd_put_32 (output_bfd, 0x40000002, entry+4); /* call .+8 */ | |
912 | bfd_put_32 (output_bfd, nop, entry+8); /* nop */ | |
913 | bfd_put_32 (output_bfd, ldx, entry+12); /* ldx [%o7+P],%g1 */ | |
914 | bfd_put_32 (output_bfd, 0x83c3c001, entry+16); /* jmpl %o7+%g1,%g1 */ | |
915 | bfd_put_32 (output_bfd, 0x9e100005, entry+20); /* mov %g5,%o7 */ | |
916 | ||
a11c78e7 | 917 | bfd_put_64 (output_bfd, contents - (entry+4), ptr); |
252b5132 RH |
918 | } |
919 | } | |
920 | } | |
921 | ||
922 | /* Return the offset of a particular plt entry within the .plt section. */ | |
923 | ||
924 | static bfd_vma | |
925 | sparc64_elf_plt_entry_offset (index) | |
926 | int index; | |
927 | { | |
928 | int block, ofs; | |
929 | ||
930 | if (index < LARGE_PLT_THRESHOLD) | |
931 | return index * PLT_ENTRY_SIZE; | |
932 | ||
933 | /* See above for details. */ | |
934 | ||
935 | block = (index - LARGE_PLT_THRESHOLD) / 160; | |
936 | ofs = (index - LARGE_PLT_THRESHOLD) % 160; | |
937 | ||
938 | return ((bfd_vma)(LARGE_PLT_THRESHOLD + block*160) * PLT_ENTRY_SIZE | |
939 | + ofs * 6*4); | |
940 | } | |
941 | ||
942 | static bfd_vma | |
943 | sparc64_elf_plt_ptr_offset (index, max) | |
944 | int index, max; | |
945 | { | |
946 | int block, ofs, last; | |
947 | ||
948 | BFD_ASSERT(index >= LARGE_PLT_THRESHOLD); | |
949 | ||
950 | /* See above for details. */ | |
951 | ||
a11c78e7 RH |
952 | block = (((index - LARGE_PLT_THRESHOLD) / 160) * 160) |
953 | + LARGE_PLT_THRESHOLD; | |
954 | ofs = index - block; | |
955 | if (block + 160 > max) | |
956 | last = (max - LARGE_PLT_THRESHOLD) % 160; | |
957 | else | |
958 | last = 160; | |
252b5132 | 959 | |
a11c78e7 | 960 | return (block * PLT_ENTRY_SIZE |
252b5132 RH |
961 | + last * 6*4 |
962 | + ofs * 8); | |
963 | } | |
964 | ||
965 | ||
966 | \f | |
967 | /* Look through the relocs for a section during the first phase, and | |
968 | allocate space in the global offset table or procedure linkage | |
969 | table. */ | |
970 | ||
971 | static boolean | |
972 | sparc64_elf_check_relocs (abfd, info, sec, relocs) | |
973 | bfd *abfd; | |
974 | struct bfd_link_info *info; | |
975 | asection *sec; | |
976 | const Elf_Internal_Rela *relocs; | |
977 | { | |
978 | bfd *dynobj; | |
979 | Elf_Internal_Shdr *symtab_hdr; | |
980 | struct elf_link_hash_entry **sym_hashes; | |
981 | bfd_vma *local_got_offsets; | |
982 | const Elf_Internal_Rela *rel; | |
983 | const Elf_Internal_Rela *rel_end; | |
984 | asection *sgot; | |
985 | asection *srelgot; | |
986 | asection *sreloc; | |
987 | ||
988 | if (info->relocateable || !(sec->flags & SEC_ALLOC)) | |
989 | return true; | |
990 | ||
991 | dynobj = elf_hash_table (info)->dynobj; | |
992 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
993 | sym_hashes = elf_sym_hashes (abfd); | |
994 | local_got_offsets = elf_local_got_offsets (abfd); | |
995 | ||
996 | sgot = NULL; | |
997 | srelgot = NULL; | |
998 | sreloc = NULL; | |
999 | ||
1000 | rel_end = relocs + sec->reloc_count; | |
1001 | for (rel = relocs; rel < rel_end; rel++) | |
1002 | { | |
1003 | unsigned long r_symndx; | |
1004 | struct elf_link_hash_entry *h; | |
1005 | ||
1006 | r_symndx = ELF64_R_SYM (rel->r_info); | |
1007 | if (r_symndx < symtab_hdr->sh_info) | |
1008 | h = NULL; | |
1009 | else | |
1010 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
1011 | ||
f65054f7 | 1012 | switch (ELF64_R_TYPE_ID (rel->r_info)) |
252b5132 RH |
1013 | { |
1014 | case R_SPARC_GOT10: | |
1015 | case R_SPARC_GOT13: | |
1016 | case R_SPARC_GOT22: | |
1017 | /* This symbol requires a global offset table entry. */ | |
1018 | ||
1019 | if (dynobj == NULL) | |
1020 | { | |
1021 | /* Create the .got section. */ | |
1022 | elf_hash_table (info)->dynobj = dynobj = abfd; | |
1023 | if (! _bfd_elf_create_got_section (dynobj, info)) | |
1024 | return false; | |
1025 | } | |
1026 | ||
1027 | if (sgot == NULL) | |
1028 | { | |
1029 | sgot = bfd_get_section_by_name (dynobj, ".got"); | |
1030 | BFD_ASSERT (sgot != NULL); | |
1031 | } | |
1032 | ||
1033 | if (srelgot == NULL && (h != NULL || info->shared)) | |
1034 | { | |
1035 | srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); | |
1036 | if (srelgot == NULL) | |
1037 | { | |
1038 | srelgot = bfd_make_section (dynobj, ".rela.got"); | |
1039 | if (srelgot == NULL | |
1040 | || ! bfd_set_section_flags (dynobj, srelgot, | |
1041 | (SEC_ALLOC | |
1042 | | SEC_LOAD | |
1043 | | SEC_HAS_CONTENTS | |
1044 | | SEC_IN_MEMORY | |
1045 | | SEC_LINKER_CREATED | |
1046 | | SEC_READONLY)) | |
1047 | || ! bfd_set_section_alignment (dynobj, srelgot, 3)) | |
1048 | return false; | |
1049 | } | |
1050 | } | |
1051 | ||
1052 | if (h != NULL) | |
1053 | { | |
1054 | if (h->got.offset != (bfd_vma) -1) | |
1055 | { | |
1056 | /* We have already allocated space in the .got. */ | |
1057 | break; | |
1058 | } | |
1059 | h->got.offset = sgot->_raw_size; | |
1060 | ||
1061 | /* Make sure this symbol is output as a dynamic symbol. */ | |
1062 | if (h->dynindx == -1) | |
1063 | { | |
1064 | if (! bfd_elf64_link_record_dynamic_symbol (info, h)) | |
1065 | return false; | |
1066 | } | |
1067 | ||
1068 | srelgot->_raw_size += sizeof (Elf64_External_Rela); | |
1069 | } | |
1070 | else | |
1071 | { | |
1072 | /* This is a global offset table entry for a local | |
1073 | symbol. */ | |
1074 | if (local_got_offsets == NULL) | |
1075 | { | |
1076 | size_t size; | |
1077 | register unsigned int i; | |
1078 | ||
1079 | size = symtab_hdr->sh_info * sizeof (bfd_vma); | |
1080 | local_got_offsets = (bfd_vma *) bfd_alloc (abfd, size); | |
1081 | if (local_got_offsets == NULL) | |
1082 | return false; | |
1083 | elf_local_got_offsets (abfd) = local_got_offsets; | |
1084 | for (i = 0; i < symtab_hdr->sh_info; i++) | |
1085 | local_got_offsets[i] = (bfd_vma) -1; | |
1086 | } | |
1087 | if (local_got_offsets[r_symndx] != (bfd_vma) -1) | |
1088 | { | |
1089 | /* We have already allocated space in the .got. */ | |
1090 | break; | |
1091 | } | |
1092 | local_got_offsets[r_symndx] = sgot->_raw_size; | |
1093 | ||
1094 | if (info->shared) | |
1095 | { | |
1096 | /* If we are generating a shared object, we need to | |
1097 | output a R_SPARC_RELATIVE reloc so that the | |
1098 | dynamic linker can adjust this GOT entry. */ | |
1099 | srelgot->_raw_size += sizeof (Elf64_External_Rela); | |
1100 | } | |
1101 | } | |
1102 | ||
1103 | sgot->_raw_size += 8; | |
1104 | ||
1105 | #if 0 | |
1106 | /* Doesn't work for 64-bit -fPIC, since sethi/or builds | |
1107 | unsigned numbers. If we permit ourselves to modify | |
1108 | code so we get sethi/xor, this could work. | |
1109 | Question: do we consider conditionally re-enabling | |
1110 | this for -fpic, once we know about object code models? */ | |
1111 | /* If the .got section is more than 0x1000 bytes, we add | |
1112 | 0x1000 to the value of _GLOBAL_OFFSET_TABLE_, so that 13 | |
1113 | bit relocations have a greater chance of working. */ | |
1114 | if (sgot->_raw_size >= 0x1000 | |
1115 | && elf_hash_table (info)->hgot->root.u.def.value == 0) | |
1116 | elf_hash_table (info)->hgot->root.u.def.value = 0x1000; | |
1117 | #endif | |
1118 | ||
1119 | break; | |
1120 | ||
1121 | case R_SPARC_WPLT30: | |
1122 | case R_SPARC_PLT32: | |
1123 | case R_SPARC_HIPLT22: | |
1124 | case R_SPARC_LOPLT10: | |
1125 | case R_SPARC_PCPLT32: | |
1126 | case R_SPARC_PCPLT22: | |
1127 | case R_SPARC_PCPLT10: | |
1128 | case R_SPARC_PLT64: | |
1129 | /* This symbol requires a procedure linkage table entry. We | |
1130 | actually build the entry in adjust_dynamic_symbol, | |
1131 | because this might be a case of linking PIC code without | |
1132 | linking in any dynamic objects, in which case we don't | |
1133 | need to generate a procedure linkage table after all. */ | |
1134 | ||
1135 | if (h == NULL) | |
1136 | { | |
1137 | /* It does not make sense to have a procedure linkage | |
1138 | table entry for a local symbol. */ | |
1139 | bfd_set_error (bfd_error_bad_value); | |
1140 | return false; | |
1141 | } | |
1142 | ||
1143 | /* Make sure this symbol is output as a dynamic symbol. */ | |
1144 | if (h->dynindx == -1) | |
1145 | { | |
1146 | if (! bfd_elf64_link_record_dynamic_symbol (info, h)) | |
1147 | return false; | |
1148 | } | |
1149 | ||
1150 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; | |
1151 | break; | |
1152 | ||
1153 | case R_SPARC_PC10: | |
1154 | case R_SPARC_PC22: | |
1155 | case R_SPARC_PC_HH22: | |
1156 | case R_SPARC_PC_HM10: | |
1157 | case R_SPARC_PC_LM22: | |
1158 | if (h != NULL | |
1159 | && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) | |
1160 | break; | |
1161 | /* Fall through. */ | |
1162 | case R_SPARC_DISP8: | |
1163 | case R_SPARC_DISP16: | |
1164 | case R_SPARC_DISP32: | |
1165 | case R_SPARC_DISP64: | |
1166 | case R_SPARC_WDISP30: | |
1167 | case R_SPARC_WDISP22: | |
1168 | case R_SPARC_WDISP19: | |
1169 | case R_SPARC_WDISP16: | |
1170 | if (h == NULL) | |
1171 | break; | |
1172 | /* Fall through. */ | |
1173 | case R_SPARC_8: | |
1174 | case R_SPARC_16: | |
1175 | case R_SPARC_32: | |
1176 | case R_SPARC_HI22: | |
1177 | case R_SPARC_22: | |
1178 | case R_SPARC_13: | |
1179 | case R_SPARC_LO10: | |
1180 | case R_SPARC_UA32: | |
1181 | case R_SPARC_10: | |
1182 | case R_SPARC_11: | |
1183 | case R_SPARC_64: | |
1184 | case R_SPARC_OLO10: | |
1185 | case R_SPARC_HH22: | |
1186 | case R_SPARC_HM10: | |
1187 | case R_SPARC_LM22: | |
1188 | case R_SPARC_7: | |
1189 | case R_SPARC_5: | |
1190 | case R_SPARC_6: | |
1191 | case R_SPARC_HIX22: | |
1192 | case R_SPARC_LOX10: | |
1193 | case R_SPARC_H44: | |
1194 | case R_SPARC_M44: | |
1195 | case R_SPARC_L44: | |
1196 | case R_SPARC_UA64: | |
1197 | case R_SPARC_UA16: | |
1198 | /* When creating a shared object, we must copy these relocs | |
1199 | into the output file. We create a reloc section in | |
1200 | dynobj and make room for the reloc. | |
1201 | ||
1202 | But don't do this for debugging sections -- this shows up | |
1203 | with DWARF2 -- first because they are not loaded, and | |
1204 | second because DWARF sez the debug info is not to be | |
1205 | biased by the load address. */ | |
1206 | if (info->shared && (sec->flags & SEC_ALLOC)) | |
1207 | { | |
1208 | if (sreloc == NULL) | |
1209 | { | |
1210 | const char *name; | |
1211 | ||
1212 | name = (bfd_elf_string_from_elf_section | |
1213 | (abfd, | |
1214 | elf_elfheader (abfd)->e_shstrndx, | |
1215 | elf_section_data (sec)->rel_hdr.sh_name)); | |
1216 | if (name == NULL) | |
1217 | return false; | |
1218 | ||
1219 | BFD_ASSERT (strncmp (name, ".rela", 5) == 0 | |
1220 | && strcmp (bfd_get_section_name (abfd, sec), | |
1221 | name + 5) == 0); | |
1222 | ||
1223 | sreloc = bfd_get_section_by_name (dynobj, name); | |
1224 | if (sreloc == NULL) | |
1225 | { | |
1226 | flagword flags; | |
1227 | ||
1228 | sreloc = bfd_make_section (dynobj, name); | |
1229 | flags = (SEC_HAS_CONTENTS | SEC_READONLY | |
1230 | | SEC_IN_MEMORY | SEC_LINKER_CREATED); | |
1231 | if ((sec->flags & SEC_ALLOC) != 0) | |
1232 | flags |= SEC_ALLOC | SEC_LOAD; | |
1233 | if (sreloc == NULL | |
1234 | || ! bfd_set_section_flags (dynobj, sreloc, flags) | |
1235 | || ! bfd_set_section_alignment (dynobj, sreloc, 3)) | |
1236 | return false; | |
1237 | } | |
1238 | } | |
1239 | ||
1240 | sreloc->_raw_size += sizeof (Elf64_External_Rela); | |
1241 | } | |
1242 | break; | |
1243 | ||
1244 | case R_SPARC_REGISTER: | |
1245 | /* Nothing to do. */ | |
1246 | break; | |
1247 | ||
1248 | default: | |
1249 | (*_bfd_error_handler)(_("%s: check_relocs: unhandled reloc type %d"), | |
1250 | bfd_get_filename(abfd), | |
f65054f7 | 1251 | ELF64_R_TYPE_ID (rel->r_info)); |
252b5132 RH |
1252 | return false; |
1253 | } | |
1254 | } | |
1255 | ||
1256 | return true; | |
1257 | } | |
1258 | ||
587ff49e RH |
1259 | /* Hook called by the linker routine which adds symbols from an object |
1260 | file. We use it for STT_REGISTER symbols. */ | |
1261 | ||
1262 | static boolean | |
1263 | sparc64_elf_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp) | |
1264 | bfd *abfd; | |
1265 | struct bfd_link_info *info; | |
1266 | const Elf_Internal_Sym *sym; | |
1267 | const char **namep; | |
1268 | flagword *flagsp; | |
1269 | asection **secp; | |
1270 | bfd_vma *valp; | |
1271 | { | |
1272 | static char *stt_types[] = { "NOTYPE", "OBJECT", "FUNCTION" }; | |
1273 | ||
1274 | if (ELF_ST_TYPE (sym->st_info) == STT_REGISTER) | |
1275 | { | |
1276 | int reg; | |
1277 | struct sparc64_elf_app_reg *p; | |
1278 | ||
1279 | reg = (int)sym->st_value; | |
1280 | switch (reg & ~1) | |
1281 | { | |
1282 | case 2: reg -= 2; break; | |
1283 | case 6: reg -= 4; break; | |
1284 | default: | |
1285 | (*_bfd_error_handler) | |
1286 | (_("%s: Only registers %%g[2367] can be declared using STT_REGISTER"), | |
1287 | bfd_get_filename (abfd)); | |
1288 | return false; | |
1289 | } | |
1290 | ||
1291 | if (info->hash->creator != abfd->xvec | |
1292 | || (abfd->flags & DYNAMIC) != 0) | |
1293 | { | |
1294 | /* STT_REGISTER only works when linking an elf64_sparc object. | |
1295 | If STT_REGISTER comes from a dynamic object, don't put it into | |
1296 | the output bfd. The dynamic linker will recheck it. */ | |
1297 | *namep = NULL; | |
1298 | return true; | |
1299 | } | |
1300 | ||
1301 | p = sparc64_elf_hash_table(info)->app_regs + reg; | |
1302 | ||
1303 | if (p->name != NULL && strcmp (p->name, *namep)) | |
1304 | { | |
1305 | (*_bfd_error_handler) | |
1306 | (_("Register %%g%d used incompatibly: " | |
1307 | "previously declared in %s to %s, in %s redefined to %s"), | |
1308 | (int)sym->st_value, | |
1309 | bfd_get_filename (p->abfd), *p->name ? p->name : "#scratch", | |
1310 | bfd_get_filename (abfd), **namep ? *namep : "#scratch"); | |
1311 | return false; | |
1312 | } | |
1313 | ||
1314 | if (p->name == NULL) | |
1315 | { | |
1316 | if (**namep) | |
1317 | { | |
1318 | struct elf_link_hash_entry *h; | |
1319 | ||
1320 | h = (struct elf_link_hash_entry *) | |
1321 | bfd_link_hash_lookup (info->hash, *namep, false, false, false); | |
1322 | ||
1323 | if (h != NULL) | |
1324 | { | |
1325 | unsigned char type = h->type; | |
1326 | ||
1327 | if (type > STT_FUNC) type = 0; | |
1328 | (*_bfd_error_handler) | |
1329 | (_("Symbol `%s' has differing types: " | |
1330 | "previously %s, REGISTER in %s"), | |
1331 | *namep, stt_types [type], bfd_get_filename (abfd)); | |
1332 | return false; | |
1333 | } | |
1334 | ||
1335 | p->name = bfd_hash_allocate (&info->hash->table, | |
1336 | strlen (*namep) + 1); | |
1337 | if (!p->name) | |
1338 | return false; | |
1339 | ||
1340 | strcpy (p->name, *namep); | |
1341 | } | |
1342 | else | |
1343 | p->name = ""; | |
1344 | p->bind = ELF_ST_BIND (sym->st_info); | |
1345 | p->abfd = abfd; | |
1346 | p->shndx = sym->st_shndx; | |
1347 | } | |
1348 | else | |
1349 | { | |
1350 | if (p->bind == STB_WEAK | |
1351 | && ELF_ST_BIND (sym->st_info) == STB_GLOBAL) | |
1352 | { | |
1353 | p->bind = STB_GLOBAL; | |
1354 | p->abfd = abfd; | |
1355 | } | |
1356 | } | |
1357 | *namep = NULL; | |
1358 | return true; | |
1359 | } | |
1360 | else if (! *namep || ! **namep) | |
1361 | return true; | |
1362 | else | |
1363 | { | |
1364 | int i; | |
1365 | struct sparc64_elf_app_reg *p; | |
1366 | ||
1367 | p = sparc64_elf_hash_table(info)->app_regs; | |
1368 | for (i = 0; i < 4; i++, p++) | |
1369 | if (p->name != NULL && ! strcmp (p->name, *namep)) | |
1370 | { | |
1371 | unsigned char type = ELF_ST_TYPE (sym->st_info); | |
1372 | ||
1373 | if (type > STT_FUNC) type = 0; | |
1374 | (*_bfd_error_handler) | |
1375 | (_("Symbol `%s' has differing types: " | |
1376 | "REGISTER in %s, %s in %s"), | |
1377 | *namep, bfd_get_filename (p->abfd), stt_types [type], | |
1378 | bfd_get_filename (abfd)); | |
1379 | return false; | |
1380 | } | |
1381 | } | |
1382 | return true; | |
1383 | } | |
1384 | ||
1385 | /* This function takes care of emiting STT_REGISTER symbols | |
1386 | which we cannot easily keep in the symbol hash table. */ | |
1387 | ||
1388 | static boolean | |
1389 | sparc64_elf_output_arch_syms (output_bfd, info, finfo, func) | |
1390 | bfd *output_bfd; | |
1391 | struct bfd_link_info *info; | |
1392 | PTR finfo; | |
1393 | boolean (*func) PARAMS ((PTR, const char *, | |
1394 | Elf_Internal_Sym *, asection *)); | |
1395 | { | |
1396 | int reg; | |
1397 | struct sparc64_elf_app_reg *app_regs = | |
1398 | sparc64_elf_hash_table(info)->app_regs; | |
1399 | Elf_Internal_Sym sym; | |
1400 | ||
1401 | /* We arranged in size_dynamic_sections to put the STT_REGISTER entries | |
1402 | at the end of the dynlocal list, so they came at the end of the local | |
1403 | symbols in the symtab. Except that they aren't STB_LOCAL, so we need | |
1404 | to back up symtab->sh_info. */ | |
1405 | if (elf_hash_table (info)->dynlocal) | |
1406 | { | |
1fa0ddb3 RH |
1407 | bfd * dynobj = elf_hash_table (info)->dynobj; |
1408 | asection *dynsymsec = bfd_get_section_by_name (dynobj, ".dynsym"); | |
587ff49e RH |
1409 | struct elf_link_local_dynamic_entry *e; |
1410 | ||
1411 | for (e = elf_hash_table (info)->dynlocal; e ; e = e->next) | |
1412 | if (e->input_indx == -1) | |
1413 | break; | |
1414 | if (e) | |
1415 | { | |
1416 | elf_section_data (dynsymsec->output_section)->this_hdr.sh_info | |
1417 | = e->dynindx; | |
1418 | } | |
1419 | } | |
1420 | ||
1421 | if (info->strip == strip_all) | |
1422 | return true; | |
1423 | ||
1424 | for (reg = 0; reg < 4; reg++) | |
1425 | if (app_regs [reg].name != NULL) | |
1426 | { | |
1427 | if (info->strip == strip_some | |
1428 | && bfd_hash_lookup (info->keep_hash, | |
1429 | app_regs [reg].name, | |
1430 | false, false) == NULL) | |
1431 | continue; | |
1432 | ||
1433 | sym.st_value = reg < 2 ? reg + 2 : reg + 4; | |
1434 | sym.st_size = 0; | |
1435 | sym.st_other = 0; | |
1436 | sym.st_info = ELF_ST_INFO (app_regs [reg].bind, STT_REGISTER); | |
1437 | sym.st_shndx = app_regs [reg].shndx; | |
1438 | if (! (*func) (finfo, app_regs [reg].name, &sym, | |
1439 | sym.st_shndx == SHN_ABS | |
1440 | ? bfd_abs_section_ptr : bfd_und_section_ptr)) | |
1441 | return false; | |
1442 | } | |
1443 | ||
1444 | return true; | |
1445 | } | |
1446 | ||
1447 | static int | |
1448 | sparc64_elf_get_symbol_type (elf_sym, type) | |
1449 | Elf_Internal_Sym * elf_sym; | |
1450 | int type; | |
1451 | { | |
1452 | if (ELF_ST_TYPE (elf_sym->st_info) == STT_REGISTER) | |
1453 | return STT_REGISTER; | |
1454 | else | |
1455 | return type; | |
1456 | } | |
1457 | ||
1458 | /* A STB_GLOBAL,STT_REGISTER symbol should be BSF_GLOBAL | |
1459 | even in SHN_UNDEF section. */ | |
1460 | ||
1461 | static void | |
1462 | sparc64_elf_symbol_processing (abfd, asym) | |
1463 | bfd *abfd; | |
1464 | asymbol *asym; | |
1465 | { | |
1466 | elf_symbol_type *elfsym; | |
1467 | ||
1468 | elfsym = (elf_symbol_type *) asym; | |
1469 | if (elfsym->internal_elf_sym.st_info | |
1470 | == ELF_ST_INFO (STB_GLOBAL, STT_REGISTER)) | |
1471 | { | |
1472 | asym->flags |= BSF_GLOBAL; | |
1473 | } | |
1474 | } | |
1475 | ||
252b5132 RH |
1476 | /* Adjust a symbol defined by a dynamic object and referenced by a |
1477 | regular object. The current definition is in some section of the | |
1478 | dynamic object, but we're not including those sections. We have to | |
1479 | change the definition to something the rest of the link can | |
1480 | understand. */ | |
1481 | ||
1482 | static boolean | |
1483 | sparc64_elf_adjust_dynamic_symbol (info, h) | |
1484 | struct bfd_link_info *info; | |
1485 | struct elf_link_hash_entry *h; | |
1486 | { | |
1487 | bfd *dynobj; | |
1488 | asection *s; | |
1489 | unsigned int power_of_two; | |
1490 | ||
1491 | dynobj = elf_hash_table (info)->dynobj; | |
1492 | ||
1493 | /* Make sure we know what is going on here. */ | |
1494 | BFD_ASSERT (dynobj != NULL | |
1495 | && ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) | |
1496 | || h->weakdef != NULL | |
1497 | || ((h->elf_link_hash_flags | |
1498 | & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
1499 | && (h->elf_link_hash_flags | |
1500 | & ELF_LINK_HASH_REF_REGULAR) != 0 | |
1501 | && (h->elf_link_hash_flags | |
1502 | & ELF_LINK_HASH_DEF_REGULAR) == 0))); | |
1503 | ||
1504 | /* If this is a function, put it in the procedure linkage table. We | |
1505 | will fill in the contents of the procedure linkage table later | |
1506 | (although we could actually do it here). The STT_NOTYPE | |
1507 | condition is a hack specifically for the Oracle libraries | |
1508 | delivered for Solaris; for some inexplicable reason, they define | |
1509 | some of their functions as STT_NOTYPE when they really should be | |
1510 | STT_FUNC. */ | |
1511 | if (h->type == STT_FUNC | |
1512 | || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0 | |
1513 | || (h->type == STT_NOTYPE | |
1514 | && (h->root.type == bfd_link_hash_defined | |
1515 | || h->root.type == bfd_link_hash_defweak) | |
1516 | && (h->root.u.def.section->flags & SEC_CODE) != 0)) | |
1517 | { | |
1518 | if (! elf_hash_table (info)->dynamic_sections_created) | |
1519 | { | |
1520 | /* This case can occur if we saw a WPLT30 reloc in an input | |
1521 | file, but none of the input files were dynamic objects. | |
1522 | In such a case, we don't actually need to build a | |
1523 | procedure linkage table, and we can just do a WDISP30 | |
1524 | reloc instead. */ | |
1525 | BFD_ASSERT ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0); | |
1526 | return true; | |
1527 | } | |
1528 | ||
1529 | s = bfd_get_section_by_name (dynobj, ".plt"); | |
1530 | BFD_ASSERT (s != NULL); | |
1531 | ||
1532 | /* The first four bit in .plt is reserved. */ | |
1533 | if (s->_raw_size == 0) | |
1534 | s->_raw_size = PLT_HEADER_SIZE; | |
1535 | ||
1536 | /* If this symbol is not defined in a regular file, and we are | |
1537 | not generating a shared library, then set the symbol to this | |
1538 | location in the .plt. This is required to make function | |
1539 | pointers compare as equal between the normal executable and | |
1540 | the shared library. */ | |
1541 | if (! info->shared | |
1542 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
1543 | { | |
1544 | h->root.u.def.section = s; | |
1545 | h->root.u.def.value = s->_raw_size; | |
1546 | } | |
1547 | ||
1548 | /* To simplify matters later, just store the plt index here. */ | |
1549 | h->plt.offset = s->_raw_size / PLT_ENTRY_SIZE; | |
1550 | ||
1551 | /* Make room for this entry. */ | |
1552 | s->_raw_size += PLT_ENTRY_SIZE; | |
1553 | ||
1554 | /* We also need to make an entry in the .rela.plt section. */ | |
1555 | ||
1556 | s = bfd_get_section_by_name (dynobj, ".rela.plt"); | |
1557 | BFD_ASSERT (s != NULL); | |
1558 | ||
1559 | /* The first plt entries are reserved, and the relocations must | |
1560 | pair up exactly. */ | |
1561 | if (s->_raw_size == 0) | |
1562 | s->_raw_size += (PLT_HEADER_SIZE/PLT_ENTRY_SIZE | |
1563 | * sizeof (Elf64_External_Rela)); | |
1564 | ||
1565 | s->_raw_size += sizeof (Elf64_External_Rela); | |
1566 | ||
1567 | /* The procedure linkage table size is bounded by the magnitude | |
1568 | of the offset we can describe in the entry. */ | |
1569 | if (s->_raw_size >= (bfd_vma)1 << 32) | |
1570 | { | |
1571 | bfd_set_error (bfd_error_bad_value); | |
1572 | return false; | |
1573 | } | |
1574 | ||
1575 | return true; | |
1576 | } | |
1577 | ||
1578 | /* If this is a weak symbol, and there is a real definition, the | |
1579 | processor independent code will have arranged for us to see the | |
1580 | real definition first, and we can just use the same value. */ | |
1581 | if (h->weakdef != NULL) | |
1582 | { | |
1583 | BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined | |
1584 | || h->weakdef->root.type == bfd_link_hash_defweak); | |
1585 | h->root.u.def.section = h->weakdef->root.u.def.section; | |
1586 | h->root.u.def.value = h->weakdef->root.u.def.value; | |
1587 | return true; | |
1588 | } | |
1589 | ||
1590 | /* This is a reference to a symbol defined by a dynamic object which | |
1591 | is not a function. */ | |
1592 | ||
1593 | /* If we are creating a shared library, we must presume that the | |
1594 | only references to the symbol are via the global offset table. | |
1595 | For such cases we need not do anything here; the relocations will | |
1596 | be handled correctly by relocate_section. */ | |
1597 | if (info->shared) | |
1598 | return true; | |
1599 | ||
1600 | /* We must allocate the symbol in our .dynbss section, which will | |
1601 | become part of the .bss section of the executable. There will be | |
1602 | an entry for this symbol in the .dynsym section. The dynamic | |
1603 | object will contain position independent code, so all references | |
1604 | from the dynamic object to this symbol will go through the global | |
1605 | offset table. The dynamic linker will use the .dynsym entry to | |
1606 | determine the address it must put in the global offset table, so | |
1607 | both the dynamic object and the regular object will refer to the | |
1608 | same memory location for the variable. */ | |
1609 | ||
1610 | s = bfd_get_section_by_name (dynobj, ".dynbss"); | |
1611 | BFD_ASSERT (s != NULL); | |
1612 | ||
1613 | /* We must generate a R_SPARC_COPY reloc to tell the dynamic linker | |
1614 | to copy the initial value out of the dynamic object and into the | |
1615 | runtime process image. We need to remember the offset into the | |
1616 | .rel.bss section we are going to use. */ | |
1617 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) | |
1618 | { | |
1619 | asection *srel; | |
1620 | ||
1621 | srel = bfd_get_section_by_name (dynobj, ".rela.bss"); | |
1622 | BFD_ASSERT (srel != NULL); | |
1623 | srel->_raw_size += sizeof (Elf64_External_Rela); | |
1624 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY; | |
1625 | } | |
1626 | ||
1627 | /* We need to figure out the alignment required for this symbol. I | |
1628 | have no idea how ELF linkers handle this. 16-bytes is the size | |
1629 | of the largest type that requires hard alignment -- long double. */ | |
1630 | power_of_two = bfd_log2 (h->size); | |
1631 | if (power_of_two > 4) | |
1632 | power_of_two = 4; | |
1633 | ||
1634 | /* Apply the required alignment. */ | |
1635 | s->_raw_size = BFD_ALIGN (s->_raw_size, | |
1636 | (bfd_size_type) (1 << power_of_two)); | |
1637 | if (power_of_two > bfd_get_section_alignment (dynobj, s)) | |
1638 | { | |
1639 | if (! bfd_set_section_alignment (dynobj, s, power_of_two)) | |
1640 | return false; | |
1641 | } | |
1642 | ||
1643 | /* Define the symbol as being at this point in the section. */ | |
1644 | h->root.u.def.section = s; | |
1645 | h->root.u.def.value = s->_raw_size; | |
1646 | ||
1647 | /* Increment the section size to make room for the symbol. */ | |
1648 | s->_raw_size += h->size; | |
1649 | ||
1650 | return true; | |
1651 | } | |
1652 | ||
1653 | /* Set the sizes of the dynamic sections. */ | |
1654 | ||
1655 | static boolean | |
1656 | sparc64_elf_size_dynamic_sections (output_bfd, info) | |
1657 | bfd *output_bfd; | |
1658 | struct bfd_link_info *info; | |
1659 | { | |
1660 | bfd *dynobj; | |
1661 | asection *s; | |
1662 | boolean reltext; | |
1663 | boolean relplt; | |
1664 | ||
1665 | dynobj = elf_hash_table (info)->dynobj; | |
1666 | BFD_ASSERT (dynobj != NULL); | |
1667 | ||
1668 | if (elf_hash_table (info)->dynamic_sections_created) | |
1669 | { | |
1670 | /* Set the contents of the .interp section to the interpreter. */ | |
1671 | if (! info->shared) | |
1672 | { | |
1673 | s = bfd_get_section_by_name (dynobj, ".interp"); | |
1674 | BFD_ASSERT (s != NULL); | |
1675 | s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER; | |
1676 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; | |
1677 | } | |
1678 | } | |
1679 | else | |
1680 | { | |
1681 | /* We may have created entries in the .rela.got section. | |
1682 | However, if we are not creating the dynamic sections, we will | |
1683 | not actually use these entries. Reset the size of .rela.got, | |
1684 | which will cause it to get stripped from the output file | |
1685 | below. */ | |
1686 | s = bfd_get_section_by_name (dynobj, ".rela.got"); | |
1687 | if (s != NULL) | |
1688 | s->_raw_size = 0; | |
1689 | } | |
1690 | ||
1691 | /* The check_relocs and adjust_dynamic_symbol entry points have | |
1692 | determined the sizes of the various dynamic sections. Allocate | |
1693 | memory for them. */ | |
1694 | reltext = false; | |
1695 | relplt = false; | |
1696 | for (s = dynobj->sections; s != NULL; s = s->next) | |
1697 | { | |
1698 | const char *name; | |
1699 | boolean strip; | |
1700 | ||
1701 | if ((s->flags & SEC_LINKER_CREATED) == 0) | |
1702 | continue; | |
1703 | ||
1704 | /* It's OK to base decisions on the section name, because none | |
1705 | of the dynobj section names depend upon the input files. */ | |
1706 | name = bfd_get_section_name (dynobj, s); | |
1707 | ||
1708 | strip = false; | |
1709 | ||
1710 | if (strncmp (name, ".rela", 5) == 0) | |
1711 | { | |
1712 | if (s->_raw_size == 0) | |
1713 | { | |
1714 | /* If we don't need this section, strip it from the | |
1715 | output file. This is to handle .rela.bss and | |
1716 | .rel.plt. We must create it in | |
1717 | create_dynamic_sections, because it must be created | |
1718 | before the linker maps input sections to output | |
1719 | sections. The linker does that before | |
1720 | adjust_dynamic_symbol is called, and it is that | |
1721 | function which decides whether anything needs to go | |
1722 | into these sections. */ | |
1723 | strip = true; | |
1724 | } | |
1725 | else | |
1726 | { | |
1727 | const char *outname; | |
1728 | asection *target; | |
1729 | ||
1730 | /* If this relocation section applies to a read only | |
1731 | section, then we probably need a DT_TEXTREL entry. */ | |
1732 | outname = bfd_get_section_name (output_bfd, | |
1733 | s->output_section); | |
1734 | target = bfd_get_section_by_name (output_bfd, outname + 5); | |
1735 | if (target != NULL | |
1736 | && (target->flags & SEC_READONLY) != 0) | |
1737 | reltext = true; | |
1738 | ||
1739 | if (strcmp (name, ".rela.plt") == 0) | |
1740 | relplt = true; | |
1741 | ||
1742 | /* We use the reloc_count field as a counter if we need | |
1743 | to copy relocs into the output file. */ | |
1744 | s->reloc_count = 0; | |
1745 | } | |
1746 | } | |
1747 | else if (strcmp (name, ".plt") != 0 | |
1748 | && strncmp (name, ".got", 4) != 0) | |
1749 | { | |
1750 | /* It's not one of our sections, so don't allocate space. */ | |
1751 | continue; | |
1752 | } | |
1753 | ||
1754 | if (strip) | |
1755 | { | |
7f8d5fc9 | 1756 | _bfd_strip_section_from_output (info, s); |
252b5132 RH |
1757 | continue; |
1758 | } | |
1759 | ||
1760 | /* Allocate memory for the section contents. Zero the memory | |
1761 | for the benefit of .rela.plt, which has 4 unused entries | |
1762 | at the beginning, and we don't want garbage. */ | |
1763 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size); | |
1764 | if (s->contents == NULL && s->_raw_size != 0) | |
1765 | return false; | |
1766 | } | |
1767 | ||
1768 | if (elf_hash_table (info)->dynamic_sections_created) | |
1769 | { | |
1770 | /* Add some entries to the .dynamic section. We fill in the | |
1771 | values later, in sparc64_elf_finish_dynamic_sections, but we | |
1772 | must add the entries now so that we get the correct size for | |
1773 | the .dynamic section. The DT_DEBUG entry is filled in by the | |
1774 | dynamic linker and used by the debugger. */ | |
587ff49e RH |
1775 | int reg; |
1776 | struct sparc64_elf_app_reg * app_regs; | |
1777 | struct bfd_strtab_hash *dynstr; | |
1778 | struct elf_link_hash_table *eht = elf_hash_table (info); | |
1779 | ||
252b5132 RH |
1780 | if (! info->shared) |
1781 | { | |
1782 | if (! bfd_elf64_add_dynamic_entry (info, DT_DEBUG, 0)) | |
1783 | return false; | |
1784 | } | |
1785 | ||
1786 | if (relplt) | |
1787 | { | |
1788 | if (! bfd_elf64_add_dynamic_entry (info, DT_PLTGOT, 0) | |
1789 | || ! bfd_elf64_add_dynamic_entry (info, DT_PLTRELSZ, 0) | |
1790 | || ! bfd_elf64_add_dynamic_entry (info, DT_PLTREL, DT_RELA) | |
d6bcbdc1 | 1791 | || ! bfd_elf64_add_dynamic_entry (info, DT_JMPREL, 0)) |
252b5132 RH |
1792 | return false; |
1793 | } | |
1794 | ||
1795 | if (! bfd_elf64_add_dynamic_entry (info, DT_RELA, 0) | |
1796 | || ! bfd_elf64_add_dynamic_entry (info, DT_RELASZ, 0) | |
1797 | || ! bfd_elf64_add_dynamic_entry (info, DT_RELAENT, | |
1798 | sizeof (Elf64_External_Rela))) | |
1799 | return false; | |
1800 | ||
1801 | if (reltext) | |
1802 | { | |
1803 | if (! bfd_elf64_add_dynamic_entry (info, DT_TEXTREL, 0)) | |
1804 | return false; | |
1805 | } | |
587ff49e RH |
1806 | |
1807 | /* Add dynamic STT_REGISTER symbols and corresponding DT_SPARC_REGISTER | |
1808 | entries if needed. */ | |
1809 | app_regs = sparc64_elf_hash_table (info)->app_regs; | |
1810 | dynstr = eht->dynstr; | |
1811 | ||
1812 | for (reg = 0; reg < 4; reg++) | |
1813 | if (app_regs [reg].name != NULL) | |
1814 | { | |
1815 | struct elf_link_local_dynamic_entry *entry, *e; | |
1816 | ||
1817 | if (! bfd_elf64_add_dynamic_entry (info, DT_SPARC_REGISTER, 0)) | |
1818 | return false; | |
1819 | ||
1820 | entry = (struct elf_link_local_dynamic_entry *) | |
1821 | bfd_hash_allocate (&info->hash->table, sizeof (*entry)); | |
1822 | if (entry == NULL) | |
1823 | return false; | |
1824 | ||
1825 | /* We cheat here a little bit: the symbol will not be local, so we | |
1826 | put it at the end of the dynlocal linked list. We will fix it | |
1827 | later on, as we have to fix other fields anyway. */ | |
1828 | entry->isym.st_value = reg < 2 ? reg + 2 : reg + 4; | |
1829 | entry->isym.st_size = 0; | |
1830 | if (*app_regs [reg].name != '\0') | |
1831 | entry->isym.st_name | |
1832 | = _bfd_stringtab_add (dynstr, app_regs[reg].name, true, false); | |
1833 | else | |
1834 | entry->isym.st_name = 0; | |
1835 | entry->isym.st_other = 0; | |
1836 | entry->isym.st_info = ELF_ST_INFO (app_regs [reg].bind, | |
1837 | STT_REGISTER); | |
1838 | entry->isym.st_shndx = app_regs [reg].shndx; | |
1839 | entry->next = NULL; | |
1840 | entry->input_bfd = output_bfd; | |
1841 | entry->input_indx = -1; | |
1842 | ||
1843 | if (eht->dynlocal == NULL) | |
1844 | eht->dynlocal = entry; | |
1845 | else | |
1846 | { | |
1847 | for (e = eht->dynlocal; e->next; e = e->next) | |
1848 | ; | |
1849 | e->next = entry; | |
1850 | } | |
1851 | eht->dynsymcount++; | |
1852 | } | |
252b5132 RH |
1853 | } |
1854 | ||
252b5132 RH |
1855 | return true; |
1856 | } | |
252b5132 RH |
1857 | \f |
1858 | /* Relocate a SPARC64 ELF section. */ | |
1859 | ||
1860 | static boolean | |
1861 | sparc64_elf_relocate_section (output_bfd, info, input_bfd, input_section, | |
1862 | contents, relocs, local_syms, local_sections) | |
1863 | bfd *output_bfd; | |
1864 | struct bfd_link_info *info; | |
1865 | bfd *input_bfd; | |
1866 | asection *input_section; | |
1867 | bfd_byte *contents; | |
1868 | Elf_Internal_Rela *relocs; | |
1869 | Elf_Internal_Sym *local_syms; | |
1870 | asection **local_sections; | |
1871 | { | |
1872 | bfd *dynobj; | |
1873 | Elf_Internal_Shdr *symtab_hdr; | |
1874 | struct elf_link_hash_entry **sym_hashes; | |
1875 | bfd_vma *local_got_offsets; | |
1876 | bfd_vma got_base; | |
1877 | asection *sgot; | |
1878 | asection *splt; | |
1879 | asection *sreloc; | |
1880 | Elf_Internal_Rela *rel; | |
1881 | Elf_Internal_Rela *relend; | |
1882 | ||
1883 | dynobj = elf_hash_table (info)->dynobj; | |
1884 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
1885 | sym_hashes = elf_sym_hashes (input_bfd); | |
1886 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
1887 | ||
1888 | if (elf_hash_table(info)->hgot == NULL) | |
1889 | got_base = 0; | |
1890 | else | |
1891 | got_base = elf_hash_table (info)->hgot->root.u.def.value; | |
1892 | ||
1893 | sgot = splt = sreloc = NULL; | |
1894 | ||
1895 | rel = relocs; | |
1896 | relend = relocs + input_section->reloc_count; | |
1897 | for (; rel < relend; rel++) | |
1898 | { | |
1899 | int r_type; | |
1900 | reloc_howto_type *howto; | |
1901 | long r_symndx; | |
1902 | struct elf_link_hash_entry *h; | |
1903 | Elf_Internal_Sym *sym; | |
1904 | asection *sec; | |
1905 | bfd_vma relocation; | |
1906 | bfd_reloc_status_type r; | |
1907 | ||
f65054f7 | 1908 | r_type = ELF64_R_TYPE_ID (rel->r_info); |
60dac299 | 1909 | if (r_type < 0 || r_type >= (int) R_SPARC_max_std) |
252b5132 RH |
1910 | { |
1911 | bfd_set_error (bfd_error_bad_value); | |
1912 | return false; | |
1913 | } | |
1914 | howto = sparc64_elf_howto_table + r_type; | |
1915 | ||
1916 | r_symndx = ELF64_R_SYM (rel->r_info); | |
1917 | ||
1918 | if (info->relocateable) | |
1919 | { | |
1920 | /* This is a relocateable link. We don't have to change | |
1921 | anything, unless the reloc is against a section symbol, | |
1922 | in which case we have to adjust according to where the | |
1923 | section symbol winds up in the output section. */ | |
1924 | if (r_symndx < symtab_hdr->sh_info) | |
1925 | { | |
1926 | sym = local_syms + r_symndx; | |
1927 | if (ELF_ST_TYPE (sym->st_info) == STT_SECTION) | |
1928 | { | |
1929 | sec = local_sections[r_symndx]; | |
1930 | rel->r_addend += sec->output_offset + sym->st_value; | |
1931 | } | |
1932 | } | |
1933 | ||
1934 | continue; | |
1935 | } | |
1936 | ||
1937 | /* This is a final link. */ | |
1938 | h = NULL; | |
1939 | sym = NULL; | |
1940 | sec = NULL; | |
1941 | if (r_symndx < symtab_hdr->sh_info) | |
1942 | { | |
1943 | sym = local_syms + r_symndx; | |
1944 | sec = local_sections[r_symndx]; | |
1945 | relocation = (sec->output_section->vma | |
1946 | + sec->output_offset | |
1947 | + sym->st_value); | |
1948 | } | |
1949 | else | |
1950 | { | |
1951 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
1952 | while (h->root.type == bfd_link_hash_indirect | |
1953 | || h->root.type == bfd_link_hash_warning) | |
1954 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1955 | if (h->root.type == bfd_link_hash_defined | |
1956 | || h->root.type == bfd_link_hash_defweak) | |
1957 | { | |
1958 | boolean skip_it = false; | |
1959 | sec = h->root.u.def.section; | |
1960 | ||
1961 | switch (r_type) | |
1962 | { | |
1963 | case R_SPARC_WPLT30: | |
1964 | case R_SPARC_PLT32: | |
1965 | case R_SPARC_HIPLT22: | |
1966 | case R_SPARC_LOPLT10: | |
1967 | case R_SPARC_PCPLT32: | |
1968 | case R_SPARC_PCPLT22: | |
1969 | case R_SPARC_PCPLT10: | |
1970 | case R_SPARC_PLT64: | |
1971 | if (h->plt.offset != (bfd_vma) -1) | |
1972 | skip_it = true; | |
1973 | break; | |
1974 | ||
1975 | case R_SPARC_GOT10: | |
1976 | case R_SPARC_GOT13: | |
1977 | case R_SPARC_GOT22: | |
1978 | if (elf_hash_table(info)->dynamic_sections_created | |
1979 | && (!info->shared | |
1980 | || (!info->symbolic && h->dynindx != -1) | |
1981 | || !(h->elf_link_hash_flags | |
1982 | & ELF_LINK_HASH_DEF_REGULAR))) | |
1983 | skip_it = true; | |
1984 | break; | |
1985 | ||
1986 | case R_SPARC_PC10: | |
1987 | case R_SPARC_PC22: | |
1988 | case R_SPARC_PC_HH22: | |
1989 | case R_SPARC_PC_HM10: | |
1990 | case R_SPARC_PC_LM22: | |
1991 | if (!strcmp(h->root.root.string, "_GLOBAL_OFFSET_TABLE_")) | |
1992 | break; | |
1993 | /* FALLTHRU */ | |
1994 | ||
1995 | case R_SPARC_8: | |
1996 | case R_SPARC_16: | |
1997 | case R_SPARC_32: | |
1998 | case R_SPARC_DISP8: | |
1999 | case R_SPARC_DISP16: | |
2000 | case R_SPARC_DISP32: | |
2001 | case R_SPARC_WDISP30: | |
2002 | case R_SPARC_WDISP22: | |
2003 | case R_SPARC_HI22: | |
2004 | case R_SPARC_22: | |
2005 | case R_SPARC_13: | |
2006 | case R_SPARC_LO10: | |
2007 | case R_SPARC_UA32: | |
2008 | case R_SPARC_10: | |
2009 | case R_SPARC_11: | |
2010 | case R_SPARC_64: | |
2011 | case R_SPARC_OLO10: | |
2012 | case R_SPARC_HH22: | |
2013 | case R_SPARC_HM10: | |
2014 | case R_SPARC_LM22: | |
2015 | case R_SPARC_WDISP19: | |
2016 | case R_SPARC_WDISP16: | |
2017 | case R_SPARC_7: | |
2018 | case R_SPARC_5: | |
2019 | case R_SPARC_6: | |
2020 | case R_SPARC_DISP64: | |
2021 | case R_SPARC_HIX22: | |
2022 | case R_SPARC_LOX10: | |
2023 | case R_SPARC_H44: | |
2024 | case R_SPARC_M44: | |
2025 | case R_SPARC_L44: | |
2026 | case R_SPARC_UA64: | |
2027 | case R_SPARC_UA16: | |
2028 | if (info->shared | |
2029 | && ((!info->symbolic && h->dynindx != -1) | |
2030 | || !(h->elf_link_hash_flags | |
2031 | & ELF_LINK_HASH_DEF_REGULAR))) | |
2032 | skip_it = true; | |
2033 | break; | |
2034 | } | |
2035 | ||
2036 | if (skip_it) | |
2037 | { | |
2038 | /* In these cases, we don't need the relocation | |
2039 | value. We check specially because in some | |
2040 | obscure cases sec->output_section will be NULL. */ | |
2041 | relocation = 0; | |
2042 | } | |
2043 | else | |
2044 | { | |
2045 | relocation = (h->root.u.def.value | |
2046 | + sec->output_section->vma | |
2047 | + sec->output_offset); | |
2048 | } | |
2049 | } | |
2050 | else if (h->root.type == bfd_link_hash_undefweak) | |
2051 | relocation = 0; | |
2052 | else if (info->shared && !info->symbolic && !info->no_undefined) | |
2053 | relocation = 0; | |
2054 | else | |
2055 | { | |
2056 | if (! ((*info->callbacks->undefined_symbol) | |
2057 | (info, h->root.root.string, input_bfd, | |
5cc7c785 L |
2058 | input_section, rel->r_offset, |
2059 | (!info->shared || info->no_undefined)))) | |
252b5132 RH |
2060 | return false; |
2061 | relocation = 0; | |
2062 | } | |
2063 | } | |
2064 | ||
2065 | /* When generating a shared object, these relocations are copied | |
2066 | into the output file to be resolved at run time. */ | |
2067 | if (info->shared && (input_section->flags & SEC_ALLOC)) | |
2068 | { | |
2069 | switch (r_type) | |
2070 | { | |
2071 | case R_SPARC_PC10: | |
2072 | case R_SPARC_PC22: | |
2073 | case R_SPARC_PC_HH22: | |
2074 | case R_SPARC_PC_HM10: | |
2075 | case R_SPARC_PC_LM22: | |
2076 | if (h != NULL | |
2077 | && !strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_")) | |
2078 | break; | |
2079 | /* Fall through. */ | |
2080 | case R_SPARC_DISP8: | |
2081 | case R_SPARC_DISP16: | |
2082 | case R_SPARC_DISP32: | |
2083 | case R_SPARC_WDISP30: | |
2084 | case R_SPARC_WDISP22: | |
2085 | case R_SPARC_WDISP19: | |
2086 | case R_SPARC_WDISP16: | |
2087 | case R_SPARC_DISP64: | |
2088 | if (h == NULL) | |
2089 | break; | |
2090 | /* Fall through. */ | |
2091 | case R_SPARC_8: | |
2092 | case R_SPARC_16: | |
2093 | case R_SPARC_32: | |
2094 | case R_SPARC_HI22: | |
2095 | case R_SPARC_22: | |
2096 | case R_SPARC_13: | |
2097 | case R_SPARC_LO10: | |
2098 | case R_SPARC_UA32: | |
2099 | case R_SPARC_10: | |
2100 | case R_SPARC_11: | |
2101 | case R_SPARC_64: | |
2102 | case R_SPARC_OLO10: | |
2103 | case R_SPARC_HH22: | |
2104 | case R_SPARC_HM10: | |
2105 | case R_SPARC_LM22: | |
2106 | case R_SPARC_7: | |
2107 | case R_SPARC_5: | |
2108 | case R_SPARC_6: | |
2109 | case R_SPARC_HIX22: | |
2110 | case R_SPARC_LOX10: | |
2111 | case R_SPARC_H44: | |
2112 | case R_SPARC_M44: | |
2113 | case R_SPARC_L44: | |
2114 | case R_SPARC_UA64: | |
2115 | case R_SPARC_UA16: | |
2116 | { | |
2117 | Elf_Internal_Rela outrel; | |
2118 | boolean skip; | |
2119 | ||
2120 | if (sreloc == NULL) | |
2121 | { | |
2122 | const char *name = | |
2123 | (bfd_elf_string_from_elf_section | |
2124 | (input_bfd, | |
2125 | elf_elfheader (input_bfd)->e_shstrndx, | |
2126 | elf_section_data (input_section)->rel_hdr.sh_name)); | |
2127 | ||
2128 | if (name == NULL) | |
2129 | return false; | |
2130 | ||
2131 | BFD_ASSERT (strncmp (name, ".rela", 5) == 0 | |
2132 | && strcmp (bfd_get_section_name(input_bfd, | |
2133 | input_section), | |
2134 | name + 5) == 0); | |
2135 | ||
2136 | sreloc = bfd_get_section_by_name (dynobj, name); | |
2137 | BFD_ASSERT (sreloc != NULL); | |
2138 | } | |
2139 | ||
2140 | skip = false; | |
2141 | ||
2142 | if (elf_section_data (input_section)->stab_info == NULL) | |
2143 | outrel.r_offset = rel->r_offset; | |
2144 | else | |
2145 | { | |
2146 | bfd_vma off; | |
2147 | ||
2148 | off = (_bfd_stab_section_offset | |
2149 | (output_bfd, &elf_hash_table (info)->stab_info, | |
2150 | input_section, | |
2151 | &elf_section_data (input_section)->stab_info, | |
2152 | rel->r_offset)); | |
2153 | if (off == MINUS_ONE) | |
2154 | skip = true; | |
2155 | outrel.r_offset = off; | |
2156 | } | |
2157 | ||
2158 | outrel.r_offset += (input_section->output_section->vma | |
2159 | + input_section->output_offset); | |
2160 | ||
2161 | /* Optimize unaligned reloc usage now that we know where | |
2162 | it finally resides. */ | |
2163 | switch (r_type) | |
2164 | { | |
2165 | case R_SPARC_16: | |
2166 | if (outrel.r_offset & 1) r_type = R_SPARC_UA16; | |
2167 | break; | |
2168 | case R_SPARC_UA16: | |
2169 | if (!(outrel.r_offset & 1)) r_type = R_SPARC_16; | |
2170 | break; | |
2171 | case R_SPARC_32: | |
2172 | if (outrel.r_offset & 3) r_type = R_SPARC_UA32; | |
2173 | break; | |
2174 | case R_SPARC_UA32: | |
2175 | if (!(outrel.r_offset & 3)) r_type = R_SPARC_32; | |
2176 | break; | |
2177 | case R_SPARC_64: | |
2178 | if (outrel.r_offset & 7) r_type = R_SPARC_UA64; | |
2179 | break; | |
2180 | case R_SPARC_UA64: | |
2181 | if (!(outrel.r_offset & 7)) r_type = R_SPARC_64; | |
2182 | break; | |
2183 | } | |
2184 | ||
2185 | if (skip) | |
2186 | memset (&outrel, 0, sizeof outrel); | |
2187 | /* h->dynindx may be -1 if the symbol was marked to | |
2188 | become local. */ | |
2189 | else if (h != NULL | |
2190 | && ((! info->symbolic && h->dynindx != -1) | |
2191 | || (h->elf_link_hash_flags | |
2192 | & ELF_LINK_HASH_DEF_REGULAR) == 0)) | |
2193 | { | |
2194 | BFD_ASSERT (h->dynindx != -1); | |
f65054f7 RH |
2195 | outrel.r_info |
2196 | = ELF64_R_INFO (h->dynindx, | |
2197 | ELF64_R_TYPE_INFO ( | |
2198 | ELF64_R_TYPE_DATA (rel->r_info), | |
2199 | r_type)); | |
252b5132 RH |
2200 | outrel.r_addend = rel->r_addend; |
2201 | } | |
2202 | else | |
2203 | { | |
2204 | if (r_type == R_SPARC_64) | |
2205 | { | |
2206 | outrel.r_info = ELF64_R_INFO (0, R_SPARC_RELATIVE); | |
2207 | outrel.r_addend = relocation + rel->r_addend; | |
2208 | } | |
2209 | else | |
2210 | { | |
2211 | long indx; | |
2212 | ||
2213 | if (h == NULL) | |
2214 | sec = local_sections[r_symndx]; | |
2215 | else | |
2216 | { | |
2217 | BFD_ASSERT (h->root.type == bfd_link_hash_defined | |
2218 | || (h->root.type | |
2219 | == bfd_link_hash_defweak)); | |
2220 | sec = h->root.u.def.section; | |
2221 | } | |
2222 | if (sec != NULL && bfd_is_abs_section (sec)) | |
2223 | indx = 0; | |
2224 | else if (sec == NULL || sec->owner == NULL) | |
2225 | { | |
2226 | bfd_set_error (bfd_error_bad_value); | |
2227 | return false; | |
2228 | } | |
2229 | else | |
2230 | { | |
2231 | asection *osec; | |
2232 | ||
2233 | osec = sec->output_section; | |
2234 | indx = elf_section_data (osec)->dynindx; | |
2235 | ||
2236 | /* FIXME: we really should be able to link non-pic | |
2237 | shared libraries. */ | |
2238 | if (indx == 0) | |
2239 | { | |
2240 | BFD_FAIL (); | |
2241 | (*_bfd_error_handler) | |
2242 | (_("%s: probably compiled without -fPIC?"), | |
2243 | bfd_get_filename (input_bfd)); | |
2244 | bfd_set_error (bfd_error_bad_value); | |
2245 | return false; | |
2246 | } | |
2247 | } | |
2248 | ||
f65054f7 RH |
2249 | outrel.r_info |
2250 | = ELF64_R_INFO (indx, | |
2251 | ELF64_R_TYPE_INFO ( | |
2252 | ELF64_R_TYPE_DATA (rel->r_info), | |
2253 | r_type)); | |
840a9995 | 2254 | outrel.r_addend = relocation + rel->r_addend; |
252b5132 RH |
2255 | } |
2256 | } | |
2257 | ||
2258 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, | |
2259 | (((Elf64_External_Rela *) | |
2260 | sreloc->contents) | |
2261 | + sreloc->reloc_count)); | |
2262 | ++sreloc->reloc_count; | |
2263 | ||
2264 | /* This reloc will be computed at runtime, so there's no | |
2265 | need to do anything now, unless this is a RELATIVE | |
2266 | reloc in an unallocated section. */ | |
2267 | if (skip | |
2268 | || (input_section->flags & SEC_ALLOC) != 0 | |
f65054f7 | 2269 | || ELF64_R_TYPE_ID (outrel.r_info) != R_SPARC_RELATIVE) |
252b5132 RH |
2270 | continue; |
2271 | } | |
2272 | break; | |
2273 | } | |
2274 | } | |
2275 | ||
2276 | switch (r_type) | |
2277 | { | |
2278 | case R_SPARC_GOT10: | |
2279 | case R_SPARC_GOT13: | |
2280 | case R_SPARC_GOT22: | |
2281 | /* Relocation is to the entry for this symbol in the global | |
2282 | offset table. */ | |
2283 | if (sgot == NULL) | |
2284 | { | |
2285 | sgot = bfd_get_section_by_name (dynobj, ".got"); | |
2286 | BFD_ASSERT (sgot != NULL); | |
2287 | } | |
2288 | ||
2289 | if (h != NULL) | |
2290 | { | |
2291 | bfd_vma off = h->got.offset; | |
2292 | BFD_ASSERT (off != (bfd_vma) -1); | |
2293 | ||
2294 | if (! elf_hash_table (info)->dynamic_sections_created | |
2295 | || (info->shared | |
2296 | && (info->symbolic || h->dynindx == -1) | |
2297 | && (h->elf_link_hash_flags | |
2298 | & ELF_LINK_HASH_DEF_REGULAR))) | |
2299 | { | |
2300 | /* This is actually a static link, or it is a -Bsymbolic | |
2301 | link and the symbol is defined locally, or the symbol | |
2302 | was forced to be local because of a version file. We | |
2303 | must initialize this entry in the global offset table. | |
2304 | Since the offset must always be a multiple of 8, we | |
2305 | use the least significant bit to record whether we | |
2306 | have initialized it already. | |
2307 | ||
2308 | When doing a dynamic link, we create a .rela.got | |
2309 | relocation entry to initialize the value. This is | |
2310 | done in the finish_dynamic_symbol routine. */ | |
2311 | ||
2312 | if ((off & 1) != 0) | |
2313 | off &= ~1; | |
2314 | else | |
2315 | { | |
2316 | bfd_put_64 (output_bfd, relocation, | |
2317 | sgot->contents + off); | |
2318 | h->got.offset |= 1; | |
2319 | } | |
2320 | } | |
2321 | relocation = sgot->output_offset + off - got_base; | |
2322 | } | |
2323 | else | |
2324 | { | |
2325 | bfd_vma off; | |
2326 | ||
2327 | BFD_ASSERT (local_got_offsets != NULL); | |
2328 | off = local_got_offsets[r_symndx]; | |
2329 | BFD_ASSERT (off != (bfd_vma) -1); | |
2330 | ||
2331 | /* The offset must always be a multiple of 8. We use | |
2332 | the least significant bit to record whether we have | |
2333 | already processed this entry. */ | |
2334 | if ((off & 1) != 0) | |
2335 | off &= ~1; | |
2336 | else | |
2337 | { | |
2338 | bfd_put_64 (output_bfd, relocation, sgot->contents + off); | |
2339 | local_got_offsets[r_symndx] |= 1; | |
2340 | ||
2341 | if (info->shared) | |
2342 | { | |
2343 | asection *srelgot; | |
2344 | Elf_Internal_Rela outrel; | |
2345 | ||
2346 | /* We need to generate a R_SPARC_RELATIVE reloc | |
2347 | for the dynamic linker. */ | |
2348 | srelgot = bfd_get_section_by_name(dynobj, ".rela.got"); | |
2349 | BFD_ASSERT (srelgot != NULL); | |
2350 | ||
2351 | outrel.r_offset = (sgot->output_section->vma | |
2352 | + sgot->output_offset | |
2353 | + off); | |
2354 | outrel.r_info = ELF64_R_INFO (0, R_SPARC_RELATIVE); | |
2355 | outrel.r_addend = relocation; | |
2356 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, | |
2357 | (((Elf64_External_Rela *) | |
2358 | srelgot->contents) | |
2359 | + srelgot->reloc_count)); | |
2360 | ++srelgot->reloc_count; | |
2361 | } | |
2362 | } | |
2363 | relocation = sgot->output_offset + off - got_base; | |
2364 | } | |
2365 | goto do_default; | |
2366 | ||
2367 | case R_SPARC_WPLT30: | |
2368 | case R_SPARC_PLT32: | |
2369 | case R_SPARC_HIPLT22: | |
2370 | case R_SPARC_LOPLT10: | |
2371 | case R_SPARC_PCPLT32: | |
2372 | case R_SPARC_PCPLT22: | |
2373 | case R_SPARC_PCPLT10: | |
2374 | case R_SPARC_PLT64: | |
2375 | /* Relocation is to the entry for this symbol in the | |
2376 | procedure linkage table. */ | |
2377 | BFD_ASSERT (h != NULL); | |
2378 | ||
2379 | if (h->plt.offset == (bfd_vma) -1) | |
2380 | { | |
2381 | /* We didn't make a PLT entry for this symbol. This | |
2382 | happens when statically linking PIC code, or when | |
2383 | using -Bsymbolic. */ | |
2384 | goto do_default; | |
2385 | } | |
2386 | ||
2387 | if (splt == NULL) | |
2388 | { | |
2389 | splt = bfd_get_section_by_name (dynobj, ".plt"); | |
2390 | BFD_ASSERT (splt != NULL); | |
2391 | } | |
2392 | ||
2393 | relocation = (splt->output_section->vma | |
2394 | + splt->output_offset | |
2395 | + sparc64_elf_plt_entry_offset (h->plt.offset)); | |
2396 | goto do_default; | |
2397 | ||
2398 | case R_SPARC_OLO10: | |
2399 | { | |
2400 | bfd_vma x; | |
2401 | ||
2402 | relocation += rel->r_addend; | |
2403 | relocation = (relocation & 0x3ff) + ELF64_R_TYPE_DATA (rel->r_info); | |
2404 | ||
2405 | x = bfd_get_32 (input_bfd, contents + rel->r_offset); | |
2406 | x = (x & ~0x1fff) | (relocation & 0x1fff); | |
2407 | bfd_put_32 (input_bfd, x, contents + rel->r_offset); | |
2408 | ||
2409 | r = bfd_check_overflow (howto->complain_on_overflow, | |
2410 | howto->bitsize, howto->rightshift, | |
2411 | bfd_arch_bits_per_address (input_bfd), | |
2412 | relocation); | |
2413 | } | |
2414 | break; | |
2415 | ||
2416 | case R_SPARC_WDISP16: | |
2417 | { | |
2418 | bfd_vma x; | |
2419 | ||
2420 | relocation += rel->r_addend; | |
2421 | /* Adjust for pc-relative-ness. */ | |
2422 | relocation -= (input_section->output_section->vma | |
2423 | + input_section->output_offset); | |
2424 | relocation -= rel->r_offset; | |
2425 | ||
2426 | x = bfd_get_32 (input_bfd, contents + rel->r_offset); | |
2427 | x = (x & ~0x303fff) | ((((relocation >> 2) & 0xc000) << 6) | |
2428 | | ((relocation >> 2) & 0x3fff)); | |
2429 | bfd_put_32 (input_bfd, x, contents + rel->r_offset); | |
2430 | ||
2431 | r = bfd_check_overflow (howto->complain_on_overflow, | |
2432 | howto->bitsize, howto->rightshift, | |
2433 | bfd_arch_bits_per_address (input_bfd), | |
2434 | relocation); | |
2435 | } | |
2436 | break; | |
2437 | ||
2438 | case R_SPARC_HIX22: | |
2439 | { | |
2440 | bfd_vma x; | |
2441 | ||
2442 | relocation += rel->r_addend; | |
2443 | relocation = relocation ^ MINUS_ONE; | |
2444 | ||
2445 | x = bfd_get_32 (input_bfd, contents + rel->r_offset); | |
2446 | x = (x & ~0x3fffff) | ((relocation >> 10) & 0x3fffff); | |
2447 | bfd_put_32 (input_bfd, x, contents + rel->r_offset); | |
2448 | ||
2449 | r = bfd_check_overflow (howto->complain_on_overflow, | |
2450 | howto->bitsize, howto->rightshift, | |
2451 | bfd_arch_bits_per_address (input_bfd), | |
2452 | relocation); | |
2453 | } | |
2454 | break; | |
2455 | ||
2456 | case R_SPARC_LOX10: | |
2457 | { | |
2458 | bfd_vma x; | |
2459 | ||
2460 | relocation += rel->r_addend; | |
2461 | relocation = (relocation & 0x3ff) | 0x1c00; | |
2462 | ||
2463 | x = bfd_get_32 (input_bfd, contents + rel->r_offset); | |
2464 | x = (x & ~0x1fff) | relocation; | |
2465 | bfd_put_32 (input_bfd, x, contents + rel->r_offset); | |
2466 | ||
2467 | r = bfd_reloc_ok; | |
2468 | } | |
2469 | break; | |
2470 | ||
2471 | default: | |
2472 | do_default: | |
2473 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, | |
2474 | contents, rel->r_offset, | |
2475 | relocation, rel->r_addend); | |
2476 | break; | |
2477 | } | |
2478 | ||
2479 | switch (r) | |
2480 | { | |
2481 | case bfd_reloc_ok: | |
2482 | break; | |
2483 | ||
2484 | default: | |
2485 | case bfd_reloc_outofrange: | |
2486 | abort (); | |
2487 | ||
2488 | case bfd_reloc_overflow: | |
2489 | { | |
2490 | const char *name; | |
2491 | ||
2492 | if (h != NULL) | |
2493 | { | |
2494 | if (h->root.type == bfd_link_hash_undefweak | |
2495 | && howto->pc_relative) | |
2496 | { | |
2497 | /* Assume this is a call protected by other code that | |
2498 | detect the symbol is undefined. If this is the case, | |
2499 | we can safely ignore the overflow. If not, the | |
2500 | program is hosed anyway, and a little warning isn't | |
2501 | going to help. */ | |
2502 | break; | |
2503 | } | |
2504 | ||
2505 | name = h->root.root.string; | |
2506 | } | |
2507 | else | |
2508 | { | |
2509 | name = (bfd_elf_string_from_elf_section | |
2510 | (input_bfd, | |
2511 | symtab_hdr->sh_link, | |
2512 | sym->st_name)); | |
2513 | if (name == NULL) | |
2514 | return false; | |
2515 | if (*name == '\0') | |
2516 | name = bfd_section_name (input_bfd, sec); | |
2517 | } | |
2518 | if (! ((*info->callbacks->reloc_overflow) | |
2519 | (info, name, howto->name, (bfd_vma) 0, | |
2520 | input_bfd, input_section, rel->r_offset))) | |
2521 | return false; | |
2522 | } | |
2523 | break; | |
2524 | } | |
2525 | } | |
2526 | ||
2527 | return true; | |
2528 | } | |
2529 | ||
2530 | /* Finish up dynamic symbol handling. We set the contents of various | |
2531 | dynamic sections here. */ | |
2532 | ||
2533 | static boolean | |
2534 | sparc64_elf_finish_dynamic_symbol (output_bfd, info, h, sym) | |
2535 | bfd *output_bfd; | |
2536 | struct bfd_link_info *info; | |
2537 | struct elf_link_hash_entry *h; | |
2538 | Elf_Internal_Sym *sym; | |
2539 | { | |
2540 | bfd *dynobj; | |
2541 | ||
2542 | dynobj = elf_hash_table (info)->dynobj; | |
2543 | ||
2544 | if (h->plt.offset != (bfd_vma) -1) | |
2545 | { | |
2546 | asection *splt; | |
2547 | asection *srela; | |
2548 | Elf_Internal_Rela rela; | |
2549 | ||
2550 | /* This symbol has an entry in the PLT. Set it up. */ | |
2551 | ||
2552 | BFD_ASSERT (h->dynindx != -1); | |
2553 | ||
2554 | splt = bfd_get_section_by_name (dynobj, ".plt"); | |
2555 | srela = bfd_get_section_by_name (dynobj, ".rela.plt"); | |
2556 | BFD_ASSERT (splt != NULL && srela != NULL); | |
2557 | ||
2558 | /* Fill in the entry in the .rela.plt section. */ | |
2559 | ||
2560 | if (h->plt.offset < LARGE_PLT_THRESHOLD) | |
2561 | { | |
2562 | rela.r_offset = sparc64_elf_plt_entry_offset (h->plt.offset); | |
2563 | rela.r_addend = 0; | |
2564 | } | |
2565 | else | |
2566 | { | |
2567 | int max = splt->_raw_size / PLT_ENTRY_SIZE; | |
2568 | rela.r_offset = sparc64_elf_plt_ptr_offset (h->plt.offset, max); | |
a11c78e7 RH |
2569 | rela.r_addend = -(sparc64_elf_plt_entry_offset (h->plt.offset) + 4) |
2570 | -(splt->output_section->vma + splt->output_offset); | |
252b5132 RH |
2571 | } |
2572 | rela.r_offset += (splt->output_section->vma + splt->output_offset); | |
2573 | rela.r_info = ELF64_R_INFO (h->dynindx, R_SPARC_JMP_SLOT); | |
2574 | ||
2575 | bfd_elf64_swap_reloca_out (output_bfd, &rela, | |
2576 | ((Elf64_External_Rela *) srela->contents | |
2577 | + h->plt.offset)); | |
2578 | ||
2579 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
2580 | { | |
2581 | /* Mark the symbol as undefined, rather than as defined in | |
2582 | the .plt section. Leave the value alone. */ | |
2583 | sym->st_shndx = SHN_UNDEF; | |
2584 | } | |
2585 | } | |
2586 | ||
2587 | if (h->got.offset != (bfd_vma) -1) | |
2588 | { | |
2589 | asection *sgot; | |
2590 | asection *srela; | |
2591 | Elf_Internal_Rela rela; | |
2592 | ||
2593 | /* This symbol has an entry in the GOT. Set it up. */ | |
2594 | ||
2595 | sgot = bfd_get_section_by_name (dynobj, ".got"); | |
2596 | srela = bfd_get_section_by_name (dynobj, ".rela.got"); | |
2597 | BFD_ASSERT (sgot != NULL && srela != NULL); | |
2598 | ||
2599 | rela.r_offset = (sgot->output_section->vma | |
2600 | + sgot->output_offset | |
2601 | + (h->got.offset &~ 1)); | |
2602 | ||
2603 | /* If this is a -Bsymbolic link, and the symbol is defined | |
2604 | locally, we just want to emit a RELATIVE reloc. Likewise if | |
2605 | the symbol was forced to be local because of a version file. | |
2606 | The entry in the global offset table will already have been | |
2607 | initialized in the relocate_section function. */ | |
2608 | if (info->shared | |
2609 | && (info->symbolic || h->dynindx == -1) | |
2610 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)) | |
2611 | { | |
2612 | asection *sec = h->root.u.def.section; | |
2613 | rela.r_info = ELF64_R_INFO (0, R_SPARC_RELATIVE); | |
2614 | rela.r_addend = (h->root.u.def.value | |
2615 | + sec->output_section->vma | |
2616 | + sec->output_offset); | |
2617 | } | |
2618 | else | |
2619 | { | |
2620 | bfd_put_64 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset); | |
2621 | rela.r_info = ELF64_R_INFO (h->dynindx, R_SPARC_GLOB_DAT); | |
2622 | rela.r_addend = 0; | |
2623 | } | |
2624 | ||
2625 | bfd_elf64_swap_reloca_out (output_bfd, &rela, | |
2626 | ((Elf64_External_Rela *) srela->contents | |
2627 | + srela->reloc_count)); | |
2628 | ++srela->reloc_count; | |
2629 | } | |
2630 | ||
2631 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0) | |
2632 | { | |
2633 | asection *s; | |
2634 | Elf_Internal_Rela rela; | |
2635 | ||
2636 | /* This symbols needs a copy reloc. Set it up. */ | |
2637 | ||
2638 | BFD_ASSERT (h->dynindx != -1); | |
2639 | ||
2640 | s = bfd_get_section_by_name (h->root.u.def.section->owner, | |
2641 | ".rela.bss"); | |
2642 | BFD_ASSERT (s != NULL); | |
2643 | ||
2644 | rela.r_offset = (h->root.u.def.value | |
2645 | + h->root.u.def.section->output_section->vma | |
2646 | + h->root.u.def.section->output_offset); | |
2647 | rela.r_info = ELF64_R_INFO (h->dynindx, R_SPARC_COPY); | |
2648 | rela.r_addend = 0; | |
2649 | bfd_elf64_swap_reloca_out (output_bfd, &rela, | |
2650 | ((Elf64_External_Rela *) s->contents | |
2651 | + s->reloc_count)); | |
2652 | ++s->reloc_count; | |
2653 | } | |
2654 | ||
2655 | /* Mark some specially defined symbols as absolute. */ | |
2656 | if (strcmp (h->root.root.string, "_DYNAMIC") == 0 | |
2657 | || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0 | |
2658 | || strcmp (h->root.root.string, "_PROCEDURE_LINKAGE_TABLE_") == 0) | |
2659 | sym->st_shndx = SHN_ABS; | |
2660 | ||
2661 | return true; | |
2662 | } | |
2663 | ||
2664 | /* Finish up the dynamic sections. */ | |
2665 | ||
2666 | static boolean | |
2667 | sparc64_elf_finish_dynamic_sections (output_bfd, info) | |
2668 | bfd *output_bfd; | |
2669 | struct bfd_link_info *info; | |
2670 | { | |
2671 | bfd *dynobj; | |
587ff49e | 2672 | int stt_regidx = -1; |
252b5132 RH |
2673 | asection *sdyn; |
2674 | asection *sgot; | |
2675 | ||
2676 | dynobj = elf_hash_table (info)->dynobj; | |
2677 | ||
2678 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); | |
2679 | ||
2680 | if (elf_hash_table (info)->dynamic_sections_created) | |
2681 | { | |
2682 | asection *splt; | |
2683 | Elf64_External_Dyn *dyncon, *dynconend; | |
2684 | ||
2685 | splt = bfd_get_section_by_name (dynobj, ".plt"); | |
2686 | BFD_ASSERT (splt != NULL && sdyn != NULL); | |
2687 | ||
2688 | dyncon = (Elf64_External_Dyn *) sdyn->contents; | |
2689 | dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->_raw_size); | |
2690 | for (; dyncon < dynconend; dyncon++) | |
2691 | { | |
2692 | Elf_Internal_Dyn dyn; | |
2693 | const char *name; | |
2694 | boolean size; | |
2695 | ||
2696 | bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn); | |
2697 | ||
2698 | switch (dyn.d_tag) | |
2699 | { | |
2700 | case DT_PLTGOT: name = ".plt"; size = false; break; | |
2701 | case DT_PLTRELSZ: name = ".rela.plt"; size = true; break; | |
2702 | case DT_JMPREL: name = ".rela.plt"; size = false; break; | |
587ff49e RH |
2703 | case DT_SPARC_REGISTER: |
2704 | if (stt_regidx == -1) | |
2705 | { | |
2706 | stt_regidx = | |
2707 | _bfd_elf_link_lookup_local_dynindx (info, output_bfd, -1); | |
2708 | if (stt_regidx == -1) | |
2709 | return false; | |
2710 | } | |
2711 | dyn.d_un.d_val = stt_regidx++; | |
2712 | bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon); | |
2713 | /* fallthrough */ | |
252b5132 RH |
2714 | default: name = NULL; size = false; break; |
2715 | } | |
2716 | ||
2717 | if (name != NULL) | |
2718 | { | |
2719 | asection *s; | |
2720 | ||
2721 | s = bfd_get_section_by_name (output_bfd, name); | |
2722 | if (s == NULL) | |
2723 | dyn.d_un.d_val = 0; | |
2724 | else | |
2725 | { | |
2726 | if (! size) | |
2727 | dyn.d_un.d_ptr = s->vma; | |
2728 | else | |
2729 | { | |
2730 | if (s->_cooked_size != 0) | |
2731 | dyn.d_un.d_val = s->_cooked_size; | |
2732 | else | |
2733 | dyn.d_un.d_val = s->_raw_size; | |
2734 | } | |
2735 | } | |
2736 | bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon); | |
2737 | } | |
2738 | } | |
2739 | ||
2740 | /* Initialize the contents of the .plt section. */ | |
2741 | if (splt->_raw_size > 0) | |
2742 | { | |
2743 | sparc64_elf_build_plt(output_bfd, splt->contents, | |
2744 | splt->_raw_size / PLT_ENTRY_SIZE); | |
2745 | } | |
2746 | ||
2747 | elf_section_data (splt->output_section)->this_hdr.sh_entsize = | |
2748 | PLT_ENTRY_SIZE; | |
2749 | } | |
2750 | ||
2751 | /* Set the first entry in the global offset table to the address of | |
2752 | the dynamic section. */ | |
2753 | sgot = bfd_get_section_by_name (dynobj, ".got"); | |
2754 | BFD_ASSERT (sgot != NULL); | |
2755 | if (sgot->_raw_size > 0) | |
2756 | { | |
2757 | if (sdyn == NULL) | |
2758 | bfd_put_64 (output_bfd, (bfd_vma) 0, sgot->contents); | |
2759 | else | |
2760 | bfd_put_64 (output_bfd, | |
2761 | sdyn->output_section->vma + sdyn->output_offset, | |
2762 | sgot->contents); | |
2763 | } | |
2764 | ||
2765 | elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 8; | |
2766 | ||
252b5132 RH |
2767 | return true; |
2768 | } | |
2769 | \f | |
2770 | /* Functions for dealing with the e_flags field. */ | |
2771 | ||
2772 | /* Merge backend specific data from an object file to the output | |
2773 | object file when linking. */ | |
2774 | ||
2775 | static boolean | |
2776 | sparc64_elf_merge_private_bfd_data (ibfd, obfd) | |
2777 | bfd *ibfd; | |
2778 | bfd *obfd; | |
2779 | { | |
2780 | boolean error; | |
2781 | flagword new_flags, old_flags; | |
2782 | int new_mm, old_mm; | |
2783 | ||
2784 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour | |
2785 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) | |
2786 | return true; | |
2787 | ||
2788 | new_flags = elf_elfheader (ibfd)->e_flags; | |
2789 | old_flags = elf_elfheader (obfd)->e_flags; | |
2790 | ||
2791 | if (!elf_flags_init (obfd)) /* First call, no flags set */ | |
2792 | { | |
2793 | elf_flags_init (obfd) = true; | |
2794 | elf_elfheader (obfd)->e_flags = new_flags; | |
2795 | } | |
2796 | ||
2797 | else if (new_flags == old_flags) /* Compatible flags are ok */ | |
2798 | ; | |
2799 | ||
2800 | else /* Incompatible flags */ | |
2801 | { | |
2802 | error = false; | |
2803 | ||
37fb6db1 ILT |
2804 | if ((ibfd->flags & DYNAMIC) != 0) |
2805 | { | |
2806 | /* We don't want dynamic objects memory ordering and | |
2807 | architecture to have any role. That's what dynamic linker | |
2808 | should do. */ | |
2809 | old_flags &= ~(EF_SPARCV9_MM | EF_SPARC_SUN_US1 | EF_SPARC_HAL_R1); | |
2810 | old_flags |= (new_flags | |
2811 | & (EF_SPARCV9_MM | |
2812 | | EF_SPARC_SUN_US1 | |
2813 | | EF_SPARC_HAL_R1)); | |
2814 | } | |
2815 | else | |
2816 | { | |
2817 | /* Choose the highest architecture requirements. */ | |
2818 | old_flags |= (new_flags & (EF_SPARC_SUN_US1 | EF_SPARC_HAL_R1)); | |
2819 | new_flags |= (old_flags & (EF_SPARC_SUN_US1 | EF_SPARC_HAL_R1)); | |
2820 | if ((old_flags & (EF_SPARC_SUN_US1 | EF_SPARC_HAL_R1)) | |
2821 | == (EF_SPARC_SUN_US1 | EF_SPARC_HAL_R1)) | |
2822 | { | |
2823 | error = true; | |
2824 | (*_bfd_error_handler) | |
2825 | (_("%s: linking UltraSPARC specific with HAL specific code"), | |
2826 | bfd_get_filename (ibfd)); | |
2827 | } | |
2828 | /* Choose the most restrictive memory ordering. */ | |
2829 | old_mm = (old_flags & EF_SPARCV9_MM); | |
2830 | new_mm = (new_flags & EF_SPARCV9_MM); | |
2831 | old_flags &= ~EF_SPARCV9_MM; | |
2832 | new_flags &= ~EF_SPARCV9_MM; | |
2833 | if (new_mm < old_mm) | |
2834 | old_mm = new_mm; | |
2835 | old_flags |= old_mm; | |
2836 | new_flags |= old_mm; | |
2837 | } | |
252b5132 RH |
2838 | |
2839 | /* Warn about any other mismatches */ | |
2840 | if (new_flags != old_flags) | |
2841 | { | |
2842 | error = true; | |
2843 | (*_bfd_error_handler) | |
2844 | (_("%s: uses different e_flags (0x%lx) fields than previous modules (0x%lx)"), | |
2845 | bfd_get_filename (ibfd), (long)new_flags, (long)old_flags); | |
2846 | } | |
2847 | ||
2848 | elf_elfheader (obfd)->e_flags = old_flags; | |
2849 | ||
2850 | if (error) | |
2851 | { | |
2852 | bfd_set_error (bfd_error_bad_value); | |
2853 | return false; | |
2854 | } | |
2855 | } | |
2856 | return true; | |
2857 | } | |
587ff49e RH |
2858 | \f |
2859 | /* Print a STT_REGISTER symbol to file FILE. */ | |
252b5132 | 2860 | |
587ff49e RH |
2861 | static const char * |
2862 | sparc64_elf_print_symbol_all (abfd, filep, symbol) | |
2863 | bfd *abfd; | |
2864 | PTR filep; | |
2865 | asymbol *symbol; | |
2866 | { | |
2867 | FILE *file = (FILE *) filep; | |
2868 | int reg, type; | |
2869 | ||
2870 | if (ELF_ST_TYPE (((elf_symbol_type *) symbol)->internal_elf_sym.st_info) | |
2871 | != STT_REGISTER) | |
2872 | return NULL; | |
2873 | ||
2874 | reg = ((elf_symbol_type *) symbol)->internal_elf_sym.st_value; | |
2875 | type = symbol->flags; | |
2876 | fprintf (file, "REG_%c%c%11s%c%c R", "GOLI" [reg / 8], '0' + (reg & 7), "", | |
2877 | ((type & BSF_LOCAL) | |
2878 | ? (type & BSF_GLOBAL) ? '!' : 'l' | |
2879 | : (type & BSF_GLOBAL) ? 'g' : ' '), | |
2880 | (type & BSF_WEAK) ? 'w' : ' '); | |
2881 | if (symbol->name == NULL || symbol->name [0] == '\0') | |
2882 | return "#scratch"; | |
2883 | else | |
2884 | return symbol->name; | |
2885 | } | |
252b5132 RH |
2886 | \f |
2887 | /* Set the right machine number for a SPARC64 ELF file. */ | |
2888 | ||
2889 | static boolean | |
2890 | sparc64_elf_object_p (abfd) | |
2891 | bfd *abfd; | |
2892 | { | |
2893 | unsigned long mach = bfd_mach_sparc_v9; | |
2894 | ||
2895 | if (elf_elfheader (abfd)->e_flags & EF_SPARC_SUN_US1) | |
2896 | mach = bfd_mach_sparc_v9a; | |
2897 | return bfd_default_set_arch_mach (abfd, bfd_arch_sparc, mach); | |
2898 | } | |
2899 | ||
f65054f7 RH |
2900 | /* Relocations in the 64 bit SPARC ELF ABI are more complex than in |
2901 | standard ELF, because R_SPARC_OLO10 has secondary addend in | |
2902 | ELF64_R_TYPE_DATA field. This structure is used to redirect the | |
2903 | relocation handling routines. */ | |
2904 | ||
2905 | const struct elf_size_info sparc64_elf_size_info = | |
2906 | { | |
2907 | sizeof (Elf64_External_Ehdr), | |
2908 | sizeof (Elf64_External_Phdr), | |
2909 | sizeof (Elf64_External_Shdr), | |
2910 | sizeof (Elf64_External_Rel), | |
2911 | sizeof (Elf64_External_Rela), | |
2912 | sizeof (Elf64_External_Sym), | |
2913 | sizeof (Elf64_External_Dyn), | |
2914 | sizeof (Elf_External_Note), | |
a11c78e7 | 2915 | 4, /* hash-table entry size */ |
f65054f7 RH |
2916 | /* internal relocations per external relocations. |
2917 | For link purposes we use just 1 internal per | |
2918 | 1 external, for assembly and slurp symbol table | |
2919 | we use 2. */ | |
2920 | 1, | |
2921 | 64, /* arch_size */ | |
2922 | 8, /* file_align */ | |
2923 | ELFCLASS64, | |
2924 | EV_CURRENT, | |
2925 | bfd_elf64_write_out_phdrs, | |
2926 | bfd_elf64_write_shdrs_and_ehdr, | |
2927 | sparc64_elf_write_relocs, | |
2928 | bfd_elf64_swap_symbol_out, | |
2929 | sparc64_elf_slurp_reloc_table, | |
2930 | bfd_elf64_slurp_symbol_table, | |
2931 | bfd_elf64_swap_dyn_in, | |
2932 | bfd_elf64_swap_dyn_out, | |
2933 | NULL, | |
2934 | NULL, | |
2935 | NULL, | |
2936 | NULL | |
2937 | }; | |
2938 | ||
252b5132 RH |
2939 | #define TARGET_BIG_SYM bfd_elf64_sparc_vec |
2940 | #define TARGET_BIG_NAME "elf64-sparc" | |
2941 | #define ELF_ARCH bfd_arch_sparc | |
2942 | #define ELF_MAXPAGESIZE 0x100000 | |
2943 | ||
2944 | /* This is the official ABI value. */ | |
2945 | #define ELF_MACHINE_CODE EM_SPARCV9 | |
2946 | ||
2947 | /* This is the value that we used before the ABI was released. */ | |
2948 | #define ELF_MACHINE_ALT1 EM_OLD_SPARCV9 | |
2949 | ||
587ff49e RH |
2950 | #define bfd_elf64_bfd_link_hash_table_create \ |
2951 | sparc64_elf_bfd_link_hash_table_create | |
2952 | ||
252b5132 RH |
2953 | #define elf_info_to_howto \ |
2954 | sparc64_elf_info_to_howto | |
f65054f7 RH |
2955 | #define bfd_elf64_get_reloc_upper_bound \ |
2956 | sparc64_elf_get_reloc_upper_bound | |
2957 | #define bfd_elf64_get_dynamic_reloc_upper_bound \ | |
2958 | sparc64_elf_get_dynamic_reloc_upper_bound | |
2959 | #define bfd_elf64_canonicalize_dynamic_reloc \ | |
2960 | sparc64_elf_canonicalize_dynamic_reloc | |
252b5132 RH |
2961 | #define bfd_elf64_bfd_reloc_type_lookup \ |
2962 | sparc64_elf_reloc_type_lookup | |
2963 | ||
2964 | #define elf_backend_create_dynamic_sections \ | |
2965 | _bfd_elf_create_dynamic_sections | |
587ff49e RH |
2966 | #define elf_backend_add_symbol_hook \ |
2967 | sparc64_elf_add_symbol_hook | |
2968 | #define elf_backend_get_symbol_type \ | |
2969 | sparc64_elf_get_symbol_type | |
2970 | #define elf_backend_symbol_processing \ | |
2971 | sparc64_elf_symbol_processing | |
252b5132 RH |
2972 | #define elf_backend_check_relocs \ |
2973 | sparc64_elf_check_relocs | |
2974 | #define elf_backend_adjust_dynamic_symbol \ | |
2975 | sparc64_elf_adjust_dynamic_symbol | |
2976 | #define elf_backend_size_dynamic_sections \ | |
2977 | sparc64_elf_size_dynamic_sections | |
2978 | #define elf_backend_relocate_section \ | |
2979 | sparc64_elf_relocate_section | |
2980 | #define elf_backend_finish_dynamic_symbol \ | |
2981 | sparc64_elf_finish_dynamic_symbol | |
2982 | #define elf_backend_finish_dynamic_sections \ | |
2983 | sparc64_elf_finish_dynamic_sections | |
587ff49e RH |
2984 | #define elf_backend_print_symbol_all \ |
2985 | sparc64_elf_print_symbol_all | |
2986 | #define elf_backend_output_arch_syms \ | |
2987 | sparc64_elf_output_arch_syms | |
252b5132 RH |
2988 | |
2989 | #define bfd_elf64_bfd_merge_private_bfd_data \ | |
2990 | sparc64_elf_merge_private_bfd_data | |
2991 | ||
f65054f7 RH |
2992 | #define elf_backend_size_info \ |
2993 | sparc64_elf_size_info | |
252b5132 RH |
2994 | #define elf_backend_object_p \ |
2995 | sparc64_elf_object_p | |
2996 | ||
2997 | #define elf_backend_want_got_plt 0 | |
2998 | #define elf_backend_plt_readonly 0 | |
2999 | #define elf_backend_want_plt_sym 1 | |
3000 | ||
3001 | /* Section 5.2.4 of the ABI specifies a 256-byte boundary for the table. */ | |
3002 | #define elf_backend_plt_alignment 8 | |
3003 | ||
3004 | #define elf_backend_got_header_size 8 | |
3005 | #define elf_backend_plt_header_size PLT_HEADER_SIZE | |
3006 | ||
3007 | #include "elf64-target.h" |