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252b5132 RH |
1 | /* SPARC-specific support for 64-bit ELF |
2 | Copyright (C) 1993, 95, 96, 97, 98, 1999 Free Software Foundation, Inc. | |
3 | ||
4 | This file is part of BFD, the Binary File Descriptor library. | |
5 | ||
6 | This program is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 2 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | This program is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with this program; if not, write to the Free Software | |
18 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
19 | ||
20 | #include "bfd.h" | |
21 | #include "sysdep.h" | |
22 | #include "libbfd.h" | |
23 | #include "elf-bfd.h" | |
24 | ||
25 | /* This is defined if one wants to build upward compatible binaries | |
26 | with the original sparc64-elf toolchain. The support is kept in for | |
27 | now but is turned off by default. dje 970930 */ | |
28 | /*#define SPARC64_OLD_RELOCS*/ | |
29 | ||
30 | #include "elf/sparc.h" | |
31 | ||
32 | /* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */ | |
33 | #define MINUS_ONE (~ (bfd_vma) 0) | |
34 | ||
35 | static reloc_howto_type *sparc64_elf_reloc_type_lookup | |
36 | PARAMS ((bfd *, bfd_reloc_code_real_type)); | |
37 | static void sparc64_elf_info_to_howto | |
38 | PARAMS ((bfd *, arelent *, Elf_Internal_Rela *)); | |
39 | ||
40 | static void sparc64_elf_build_plt | |
41 | PARAMS((bfd *, unsigned char *, int)); | |
42 | static bfd_vma sparc64_elf_plt_entry_offset | |
43 | PARAMS((int)); | |
44 | static bfd_vma sparc64_elf_plt_ptr_offset | |
45 | PARAMS((int, int)); | |
46 | ||
47 | static boolean sparc64_elf_check_relocs | |
48 | PARAMS((bfd *, struct bfd_link_info *, asection *sec, | |
49 | const Elf_Internal_Rela *)); | |
50 | static boolean sparc64_elf_adjust_dynamic_symbol | |
51 | PARAMS((struct bfd_link_info *, struct elf_link_hash_entry *)); | |
52 | static boolean sparc64_elf_size_dynamic_sections | |
53 | PARAMS((bfd *, struct bfd_link_info *)); | |
252b5132 RH |
54 | |
55 | static boolean sparc64_elf_merge_private_bfd_data | |
56 | PARAMS ((bfd *, bfd *)); | |
57 | ||
58 | static boolean sparc64_elf_relocate_section | |
59 | PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, | |
60 | Elf_Internal_Rela *, Elf_Internal_Sym *, asection **)); | |
61 | static boolean sparc64_elf_object_p PARAMS ((bfd *)); | |
62 | \f | |
63 | /* The relocation "howto" table. */ | |
64 | ||
65 | static bfd_reloc_status_type sparc_elf_notsup_reloc | |
66 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); | |
67 | static bfd_reloc_status_type sparc_elf_wdisp16_reloc | |
68 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); | |
69 | static bfd_reloc_status_type sparc_elf_hix22_reloc | |
70 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); | |
71 | static bfd_reloc_status_type sparc_elf_lox10_reloc | |
72 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); | |
73 | ||
74 | static reloc_howto_type sparc64_elf_howto_table[] = | |
75 | { | |
76 | HOWTO(R_SPARC_NONE, 0,0, 0,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_NONE", false,0,0x00000000,true), | |
77 | HOWTO(R_SPARC_8, 0,0, 8,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_8", false,0,0x000000ff,true), | |
78 | HOWTO(R_SPARC_16, 0,1,16,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_16", false,0,0x0000ffff,true), | |
79 | HOWTO(R_SPARC_32, 0,2,32,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_32", false,0,0xffffffff,true), | |
80 | HOWTO(R_SPARC_DISP8, 0,0, 8,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_DISP8", false,0,0x000000ff,true), | |
81 | HOWTO(R_SPARC_DISP16, 0,1,16,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_DISP16", false,0,0x0000ffff,true), | |
82 | HOWTO(R_SPARC_DISP32, 0,2,32,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_DISP32", false,0,0x00ffffff,true), | |
83 | HOWTO(R_SPARC_WDISP30, 2,2,30,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_WDISP30", false,0,0x3fffffff,true), | |
84 | HOWTO(R_SPARC_WDISP22, 2,2,22,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_WDISP22", false,0,0x003fffff,true), | |
85 | HOWTO(R_SPARC_HI22, 10,2,22,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_HI22", false,0,0x003fffff,true), | |
86 | HOWTO(R_SPARC_22, 0,2,22,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_22", false,0,0x003fffff,true), | |
87 | HOWTO(R_SPARC_13, 0,2,13,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_13", false,0,0x00001fff,true), | |
88 | HOWTO(R_SPARC_LO10, 0,2,10,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_LO10", false,0,0x000003ff,true), | |
89 | HOWTO(R_SPARC_GOT10, 0,2,10,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_GOT10", false,0,0x000003ff,true), | |
90 | HOWTO(R_SPARC_GOT13, 0,2,13,false,0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_GOT13", false,0,0x00001fff,true), | |
91 | HOWTO(R_SPARC_GOT22, 10,2,22,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_GOT22", false,0,0x003fffff,true), | |
92 | HOWTO(R_SPARC_PC10, 0,2,10,true, 0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_PC10", false,0,0x000003ff,true), | |
93 | HOWTO(R_SPARC_PC22, 10,2,22,true, 0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_PC22", false,0,0x003fffff,true), | |
94 | HOWTO(R_SPARC_WPLT30, 2,2,30,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_WPLT30", false,0,0x3fffffff,true), | |
95 | HOWTO(R_SPARC_COPY, 0,0,00,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_COPY", false,0,0x00000000,true), | |
96 | 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), | |
97 | 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), | |
98 | HOWTO(R_SPARC_RELATIVE, 0,0,00,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_RELATIVE",false,0,0x00000000,true), | |
99 | HOWTO(R_SPARC_UA32, 0,0,00,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_UA32", false,0,0x00000000,true), | |
100 | #ifndef SPARC64_OLD_RELOCS | |
101 | /* These aren't implemented yet. */ | |
102 | HOWTO(R_SPARC_PLT32, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsup_reloc, "R_SPARC_PLT32", false,0,0x00000000,true), | |
103 | HOWTO(R_SPARC_HIPLT22, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsup_reloc, "R_SPARC_HIPLT22", false,0,0x00000000,true), | |
104 | HOWTO(R_SPARC_LOPLT10, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsup_reloc, "R_SPARC_LOPLT10", false,0,0x00000000,true), | |
105 | HOWTO(R_SPARC_PCPLT32, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsup_reloc, "R_SPARC_PCPLT32", false,0,0x00000000,true), | |
106 | HOWTO(R_SPARC_PCPLT22, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsup_reloc, "R_SPARC_PCPLT22", false,0,0x00000000,true), | |
107 | HOWTO(R_SPARC_PCPLT10, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsup_reloc, "R_SPARC_PCPLT10", false,0,0x00000000,true), | |
108 | #endif | |
109 | HOWTO(R_SPARC_10, 0,2,10,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_10", false,0,0x000003ff,true), | |
110 | HOWTO(R_SPARC_11, 0,2,11,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_11", false,0,0x000007ff,true), | |
111 | HOWTO(R_SPARC_64, 0,4,64,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_64", false,0,MINUS_ONE, true), | |
112 | HOWTO(R_SPARC_OLO10, 0,2,13,false,0,complain_overflow_signed, sparc_elf_notsup_reloc, "R_SPARC_OLO10", false,0,0x00001fff,true), | |
113 | HOWTO(R_SPARC_HH22, 42,2,22,false,0,complain_overflow_unsigned,bfd_elf_generic_reloc, "R_SPARC_HH22", false,0,0x003fffff,true), | |
114 | HOWTO(R_SPARC_HM10, 32,2,10,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_HM10", false,0,0x000003ff,true), | |
115 | HOWTO(R_SPARC_LM22, 10,2,22,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_LM22", false,0,0x003fffff,true), | |
116 | 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), | |
117 | 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), | |
118 | 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), | |
119 | HOWTO(R_SPARC_WDISP16, 2,2,16,true, 0,complain_overflow_signed, sparc_elf_wdisp16_reloc,"R_SPARC_WDISP16", false,0,0x00000000,true), | |
120 | HOWTO(R_SPARC_WDISP19, 2,2,19,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_WDISP19", false,0,0x0007ffff,true), | |
121 | 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), | |
122 | HOWTO(R_SPARC_7, 0,2, 7,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_7", false,0,0x0000007f,true), | |
123 | HOWTO(R_SPARC_5, 0,2, 5,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_5", false,0,0x0000001f,true), | |
124 | HOWTO(R_SPARC_6, 0,2, 6,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_6", false,0,0x0000003f,true), | |
125 | HOWTO(R_SPARC_DISP64, 0,4,64,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_DISP64", false,0,MINUS_ONE, true), | |
126 | HOWTO(R_SPARC_PLT64, 0,4,64,false,0,complain_overflow_bitfield,sparc_elf_notsup_reloc, "R_SPARC_PLT64", false,0,MINUS_ONE, false), | |
127 | HOWTO(R_SPARC_HIX22, 0,4, 0,false,0,complain_overflow_bitfield,sparc_elf_hix22_reloc, "R_SPARC_HIX22", false,0,MINUS_ONE, false), | |
128 | HOWTO(R_SPARC_LOX10, 0,4, 0,false,0,complain_overflow_dont, sparc_elf_lox10_reloc, "R_SPARC_LOX10", false,0,MINUS_ONE, false), | |
129 | HOWTO(R_SPARC_H44, 22,2,22,false,0,complain_overflow_unsigned,bfd_elf_generic_reloc, "R_SPARC_H44", false,0,0x003fffff,false), | |
130 | HOWTO(R_SPARC_M44, 12,2,10,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_M44", false,0,0x000003ff,false), | |
131 | HOWTO(R_SPARC_L44, 0,2,13,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_L44", false,0,0x00000fff,false), | |
132 | HOWTO(R_SPARC_REGISTER, 0,4, 0,false,0,complain_overflow_bitfield,sparc_elf_notsup_reloc, "R_SPARC_REGISTER",false,0,MINUS_ONE, false), | |
133 | HOWTO(R_SPARC_UA64, 0,4,64,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_UA64", false,0,MINUS_ONE, true), | |
134 | HOWTO(R_SPARC_UA16, 0,1,16,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_UA16", false,0,0x0000ffff,true) | |
135 | }; | |
136 | ||
137 | struct elf_reloc_map { | |
138 | bfd_reloc_code_real_type bfd_reloc_val; | |
139 | unsigned char elf_reloc_val; | |
140 | }; | |
141 | ||
142 | static CONST struct elf_reloc_map sparc_reloc_map[] = | |
143 | { | |
144 | { BFD_RELOC_NONE, R_SPARC_NONE, }, | |
145 | { BFD_RELOC_16, R_SPARC_16, }, | |
146 | { BFD_RELOC_8, R_SPARC_8 }, | |
147 | { BFD_RELOC_8_PCREL, R_SPARC_DISP8 }, | |
148 | { BFD_RELOC_CTOR, R_SPARC_64 }, | |
149 | { BFD_RELOC_32, R_SPARC_32 }, | |
150 | { BFD_RELOC_32_PCREL, R_SPARC_DISP32 }, | |
151 | { BFD_RELOC_HI22, R_SPARC_HI22 }, | |
152 | { BFD_RELOC_LO10, R_SPARC_LO10, }, | |
153 | { BFD_RELOC_32_PCREL_S2, R_SPARC_WDISP30 }, | |
154 | { BFD_RELOC_SPARC22, R_SPARC_22 }, | |
155 | { BFD_RELOC_SPARC13, R_SPARC_13 }, | |
156 | { BFD_RELOC_SPARC_GOT10, R_SPARC_GOT10 }, | |
157 | { BFD_RELOC_SPARC_GOT13, R_SPARC_GOT13 }, | |
158 | { BFD_RELOC_SPARC_GOT22, R_SPARC_GOT22 }, | |
159 | { BFD_RELOC_SPARC_PC10, R_SPARC_PC10 }, | |
160 | { BFD_RELOC_SPARC_PC22, R_SPARC_PC22 }, | |
161 | { BFD_RELOC_SPARC_WPLT30, R_SPARC_WPLT30 }, | |
162 | { BFD_RELOC_SPARC_COPY, R_SPARC_COPY }, | |
163 | { BFD_RELOC_SPARC_GLOB_DAT, R_SPARC_GLOB_DAT }, | |
164 | { BFD_RELOC_SPARC_JMP_SLOT, R_SPARC_JMP_SLOT }, | |
165 | { BFD_RELOC_SPARC_RELATIVE, R_SPARC_RELATIVE }, | |
166 | { BFD_RELOC_SPARC_WDISP22, R_SPARC_WDISP22 }, | |
167 | /* ??? Doesn't dwarf use this? */ | |
168 | /*{ BFD_RELOC_SPARC_UA32, R_SPARC_UA32 }, not used?? */ | |
169 | {BFD_RELOC_SPARC_10, R_SPARC_10}, | |
170 | {BFD_RELOC_SPARC_11, R_SPARC_11}, | |
171 | {BFD_RELOC_SPARC_64, R_SPARC_64}, | |
172 | {BFD_RELOC_SPARC_OLO10, R_SPARC_OLO10}, | |
173 | {BFD_RELOC_SPARC_HH22, R_SPARC_HH22}, | |
174 | {BFD_RELOC_SPARC_HM10, R_SPARC_HM10}, | |
175 | {BFD_RELOC_SPARC_LM22, R_SPARC_LM22}, | |
176 | {BFD_RELOC_SPARC_PC_HH22, R_SPARC_PC_HH22}, | |
177 | {BFD_RELOC_SPARC_PC_HM10, R_SPARC_PC_HM10}, | |
178 | {BFD_RELOC_SPARC_PC_LM22, R_SPARC_PC_LM22}, | |
179 | {BFD_RELOC_SPARC_WDISP16, R_SPARC_WDISP16}, | |
180 | {BFD_RELOC_SPARC_WDISP19, R_SPARC_WDISP19}, | |
181 | {BFD_RELOC_SPARC_7, R_SPARC_7}, | |
182 | {BFD_RELOC_SPARC_5, R_SPARC_5}, | |
183 | {BFD_RELOC_SPARC_6, R_SPARC_6}, | |
184 | {BFD_RELOC_SPARC_DISP64, R_SPARC_DISP64}, | |
185 | {BFD_RELOC_SPARC_PLT64, R_SPARC_PLT64}, | |
186 | {BFD_RELOC_SPARC_HIX22, R_SPARC_HIX22}, | |
187 | {BFD_RELOC_SPARC_LOX10, R_SPARC_LOX10}, | |
188 | {BFD_RELOC_SPARC_H44, R_SPARC_H44}, | |
189 | {BFD_RELOC_SPARC_M44, R_SPARC_M44}, | |
190 | {BFD_RELOC_SPARC_L44, R_SPARC_L44}, | |
191 | {BFD_RELOC_SPARC_REGISTER, R_SPARC_REGISTER} | |
192 | }; | |
193 | ||
194 | static reloc_howto_type * | |
195 | sparc64_elf_reloc_type_lookup (abfd, code) | |
196 | bfd *abfd; | |
197 | bfd_reloc_code_real_type code; | |
198 | { | |
199 | unsigned int i; | |
200 | for (i = 0; i < sizeof (sparc_reloc_map) / sizeof (struct elf_reloc_map); i++) | |
201 | { | |
202 | if (sparc_reloc_map[i].bfd_reloc_val == code) | |
203 | return &sparc64_elf_howto_table[(int) sparc_reloc_map[i].elf_reloc_val]; | |
204 | } | |
205 | return 0; | |
206 | } | |
207 | ||
208 | static void | |
209 | sparc64_elf_info_to_howto (abfd, cache_ptr, dst) | |
210 | bfd *abfd; | |
211 | arelent *cache_ptr; | |
212 | Elf64_Internal_Rela *dst; | |
213 | { | |
60dac299 | 214 | BFD_ASSERT (ELF64_R_TYPE (dst->r_info) < (unsigned int) R_SPARC_max_std); |
252b5132 RH |
215 | cache_ptr->howto = &sparc64_elf_howto_table[ELF64_R_TYPE (dst->r_info)]; |
216 | } | |
217 | \f | |
218 | /* Utility for performing the standard initial work of an instruction | |
219 | relocation. | |
220 | *PRELOCATION will contain the relocated item. | |
221 | *PINSN will contain the instruction from the input stream. | |
222 | If the result is `bfd_reloc_other' the caller can continue with | |
223 | performing the relocation. Otherwise it must stop and return the | |
224 | value to its caller. */ | |
225 | ||
226 | static bfd_reloc_status_type | |
227 | init_insn_reloc (abfd, | |
228 | reloc_entry, | |
229 | symbol, | |
230 | data, | |
231 | input_section, | |
232 | output_bfd, | |
233 | prelocation, | |
234 | pinsn) | |
235 | bfd *abfd; | |
236 | arelent *reloc_entry; | |
237 | asymbol *symbol; | |
238 | PTR data; | |
239 | asection *input_section; | |
240 | bfd *output_bfd; | |
241 | bfd_vma *prelocation; | |
242 | bfd_vma *pinsn; | |
243 | { | |
244 | bfd_vma relocation; | |
245 | reloc_howto_type *howto = reloc_entry->howto; | |
246 | ||
247 | if (output_bfd != (bfd *) NULL | |
248 | && (symbol->flags & BSF_SECTION_SYM) == 0 | |
249 | && (! howto->partial_inplace | |
250 | || reloc_entry->addend == 0)) | |
251 | { | |
252 | reloc_entry->address += input_section->output_offset; | |
253 | return bfd_reloc_ok; | |
254 | } | |
255 | ||
256 | /* This works because partial_inplace == false. */ | |
257 | if (output_bfd != NULL) | |
258 | return bfd_reloc_continue; | |
259 | ||
260 | if (reloc_entry->address > input_section->_cooked_size) | |
261 | return bfd_reloc_outofrange; | |
262 | ||
263 | relocation = (symbol->value | |
264 | + symbol->section->output_section->vma | |
265 | + symbol->section->output_offset); | |
266 | relocation += reloc_entry->addend; | |
267 | if (howto->pc_relative) | |
268 | { | |
269 | relocation -= (input_section->output_section->vma | |
270 | + input_section->output_offset); | |
271 | relocation -= reloc_entry->address; | |
272 | } | |
273 | ||
274 | *prelocation = relocation; | |
275 | *pinsn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address); | |
276 | return bfd_reloc_other; | |
277 | } | |
278 | ||
279 | /* For unsupported relocs. */ | |
280 | ||
281 | static bfd_reloc_status_type | |
282 | sparc_elf_notsup_reloc (abfd, | |
283 | reloc_entry, | |
284 | symbol, | |
285 | data, | |
286 | input_section, | |
287 | output_bfd, | |
288 | error_message) | |
289 | bfd *abfd; | |
290 | arelent *reloc_entry; | |
291 | asymbol *symbol; | |
292 | PTR data; | |
293 | asection *input_section; | |
294 | bfd *output_bfd; | |
295 | char **error_message; | |
296 | { | |
297 | return bfd_reloc_notsupported; | |
298 | } | |
299 | ||
300 | /* Handle the WDISP16 reloc. */ | |
301 | ||
302 | static bfd_reloc_status_type | |
303 | sparc_elf_wdisp16_reloc (abfd, reloc_entry, symbol, data, input_section, | |
304 | output_bfd, error_message) | |
305 | bfd *abfd; | |
306 | arelent *reloc_entry; | |
307 | asymbol *symbol; | |
308 | PTR data; | |
309 | asection *input_section; | |
310 | bfd *output_bfd; | |
311 | char **error_message; | |
312 | { | |
313 | bfd_vma relocation; | |
314 | bfd_vma insn; | |
315 | bfd_reloc_status_type status; | |
316 | ||
317 | status = init_insn_reloc (abfd, reloc_entry, symbol, data, | |
318 | input_section, output_bfd, &relocation, &insn); | |
319 | if (status != bfd_reloc_other) | |
320 | return status; | |
321 | ||
322 | insn = (insn & ~0x303fff) | ((((relocation >> 2) & 0xc000) << 6) | |
323 | | ((relocation >> 2) & 0x3fff)); | |
324 | bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address); | |
325 | ||
326 | if ((bfd_signed_vma) relocation < - 0x40000 | |
327 | || (bfd_signed_vma) relocation > 0x3ffff) | |
328 | return bfd_reloc_overflow; | |
329 | else | |
330 | return bfd_reloc_ok; | |
331 | } | |
332 | ||
333 | /* Handle the HIX22 reloc. */ | |
334 | ||
335 | static bfd_reloc_status_type | |
336 | sparc_elf_hix22_reloc (abfd, | |
337 | reloc_entry, | |
338 | symbol, | |
339 | data, | |
340 | input_section, | |
341 | output_bfd, | |
342 | error_message) | |
343 | bfd *abfd; | |
344 | arelent *reloc_entry; | |
345 | asymbol *symbol; | |
346 | PTR data; | |
347 | asection *input_section; | |
348 | bfd *output_bfd; | |
349 | char **error_message; | |
350 | { | |
351 | bfd_vma relocation; | |
352 | bfd_vma insn; | |
353 | bfd_reloc_status_type status; | |
354 | ||
355 | status = init_insn_reloc (abfd, reloc_entry, symbol, data, | |
356 | input_section, output_bfd, &relocation, &insn); | |
357 | if (status != bfd_reloc_other) | |
358 | return status; | |
359 | ||
360 | relocation ^= MINUS_ONE; | |
361 | insn = (insn & ~0x3fffff) | ((relocation >> 10) & 0x3fffff); | |
362 | bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address); | |
363 | ||
364 | if ((relocation & ~ (bfd_vma) 0xffffffff) != 0) | |
365 | return bfd_reloc_overflow; | |
366 | else | |
367 | return bfd_reloc_ok; | |
368 | } | |
369 | ||
370 | /* Handle the LOX10 reloc. */ | |
371 | ||
372 | static bfd_reloc_status_type | |
373 | sparc_elf_lox10_reloc (abfd, | |
374 | reloc_entry, | |
375 | symbol, | |
376 | data, | |
377 | input_section, | |
378 | output_bfd, | |
379 | error_message) | |
380 | bfd *abfd; | |
381 | arelent *reloc_entry; | |
382 | asymbol *symbol; | |
383 | PTR data; | |
384 | asection *input_section; | |
385 | bfd *output_bfd; | |
386 | char **error_message; | |
387 | { | |
388 | bfd_vma relocation; | |
389 | bfd_vma insn; | |
390 | bfd_reloc_status_type status; | |
391 | ||
392 | status = init_insn_reloc (abfd, reloc_entry, symbol, data, | |
393 | input_section, output_bfd, &relocation, &insn); | |
394 | if (status != bfd_reloc_other) | |
395 | return status; | |
396 | ||
397 | insn = (insn & ~0x1fff) | 0x1c00 | (relocation & 0x3ff); | |
398 | bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address); | |
399 | ||
400 | return bfd_reloc_ok; | |
401 | } | |
402 | \f | |
403 | /* PLT/GOT stuff */ | |
404 | ||
405 | /* Both the headers and the entries are icache aligned. */ | |
406 | #define PLT_ENTRY_SIZE 32 | |
407 | #define PLT_HEADER_SIZE (4 * PLT_ENTRY_SIZE) | |
408 | #define LARGE_PLT_THRESHOLD 32768 | |
409 | #define GOT_RESERVED_ENTRIES 1 | |
410 | ||
411 | #define ELF_DYNAMIC_INTERPRETER "/usr/lib/sparcv9/ld.so.1" | |
412 | ||
413 | ||
414 | /* Fill in the .plt section. */ | |
415 | ||
416 | static void | |
417 | sparc64_elf_build_plt (output_bfd, contents, nentries) | |
418 | bfd *output_bfd; | |
419 | unsigned char *contents; | |
420 | int nentries; | |
421 | { | |
422 | const unsigned int nop = 0x01000000; | |
423 | int i, j; | |
424 | ||
425 | /* The first four entries are reserved, and are initially undefined. | |
426 | We fill them with `illtrap 0' to force ld.so to do something. */ | |
427 | ||
428 | for (i = 0; i < PLT_HEADER_SIZE/4; ++i) | |
429 | bfd_put_32 (output_bfd, 0, contents+i*4); | |
430 | ||
431 | /* The first 32768 entries are close enough to plt1 to get there via | |
432 | a straight branch. */ | |
433 | ||
434 | for (i = 4; i < LARGE_PLT_THRESHOLD && i < nentries; ++i) | |
435 | { | |
436 | unsigned char *entry = contents + i * PLT_ENTRY_SIZE; | |
437 | unsigned int sethi, ba; | |
438 | ||
439 | /* sethi (. - plt0), %g1 */ | |
440 | sethi = 0x03000000 | (i * PLT_ENTRY_SIZE); | |
441 | ||
442 | /* ba,a,pt %icc, plt1 */ | |
443 | ba = 0x30480000 | (((contents+PLT_ENTRY_SIZE) - (entry+4)) / 4 & 0x7ffff); | |
444 | ||
445 | bfd_put_32 (output_bfd, sethi, entry); | |
446 | bfd_put_32 (output_bfd, ba, entry+4); | |
447 | bfd_put_32 (output_bfd, nop, entry+8); | |
448 | bfd_put_32 (output_bfd, nop, entry+12); | |
449 | bfd_put_32 (output_bfd, nop, entry+16); | |
450 | bfd_put_32 (output_bfd, nop, entry+20); | |
451 | bfd_put_32 (output_bfd, nop, entry+24); | |
452 | bfd_put_32 (output_bfd, nop, entry+28); | |
453 | } | |
454 | ||
455 | /* Now the tricky bit. Entries 32768 and higher are grouped in blocks of | |
456 | 160: 160 entries and 160 pointers. This is to separate code from data, | |
457 | which is much friendlier on the cache. */ | |
458 | ||
459 | for (; i < nentries; i += 160) | |
460 | { | |
461 | int block = (i + 160 <= nentries ? 160 : nentries - i); | |
462 | for (j = 0; j < block; ++j) | |
463 | { | |
464 | unsigned char *entry, *ptr; | |
465 | unsigned int ldx; | |
466 | ||
467 | entry = contents + i*PLT_ENTRY_SIZE + j*4*6; | |
468 | ptr = contents + i*PLT_ENTRY_SIZE + block*4*6 + j*8; | |
469 | ||
470 | /* ldx [%o7 + ptr - entry+4], %g1 */ | |
471 | ldx = 0xc25be000 | ((ptr - entry+4) & 0x1fff); | |
472 | ||
473 | bfd_put_32 (output_bfd, 0x8a10000f, entry); /* mov %o7,%g5 */ | |
474 | bfd_put_32 (output_bfd, 0x40000002, entry+4); /* call .+8 */ | |
475 | bfd_put_32 (output_bfd, nop, entry+8); /* nop */ | |
476 | bfd_put_32 (output_bfd, ldx, entry+12); /* ldx [%o7+P],%g1 */ | |
477 | bfd_put_32 (output_bfd, 0x83c3c001, entry+16); /* jmpl %o7+%g1,%g1 */ | |
478 | bfd_put_32 (output_bfd, 0x9e100005, entry+20); /* mov %g5,%o7 */ | |
479 | ||
480 | bfd_put_64 (output_bfd, contents - entry+4, ptr); | |
481 | } | |
482 | } | |
483 | } | |
484 | ||
485 | /* Return the offset of a particular plt entry within the .plt section. */ | |
486 | ||
487 | static bfd_vma | |
488 | sparc64_elf_plt_entry_offset (index) | |
489 | int index; | |
490 | { | |
491 | int block, ofs; | |
492 | ||
493 | if (index < LARGE_PLT_THRESHOLD) | |
494 | return index * PLT_ENTRY_SIZE; | |
495 | ||
496 | /* See above for details. */ | |
497 | ||
498 | block = (index - LARGE_PLT_THRESHOLD) / 160; | |
499 | ofs = (index - LARGE_PLT_THRESHOLD) % 160; | |
500 | ||
501 | return ((bfd_vma)(LARGE_PLT_THRESHOLD + block*160) * PLT_ENTRY_SIZE | |
502 | + ofs * 6*4); | |
503 | } | |
504 | ||
505 | static bfd_vma | |
506 | sparc64_elf_plt_ptr_offset (index, max) | |
507 | int index, max; | |
508 | { | |
509 | int block, ofs, last; | |
510 | ||
511 | BFD_ASSERT(index >= LARGE_PLT_THRESHOLD); | |
512 | ||
513 | /* See above for details. */ | |
514 | ||
515 | block = (index - LARGE_PLT_THRESHOLD) / 160; | |
516 | ofs = (index - LARGE_PLT_THRESHOLD) % 160; | |
517 | last = (max - LARGE_PLT_THRESHOLD) % 160; | |
518 | ||
519 | return ((LARGE_PLT_THRESHOLD + block*160) * PLT_ENTRY_SIZE | |
520 | + last * 6*4 | |
521 | + ofs * 8); | |
522 | } | |
523 | ||
524 | ||
525 | \f | |
526 | /* Look through the relocs for a section during the first phase, and | |
527 | allocate space in the global offset table or procedure linkage | |
528 | table. */ | |
529 | ||
530 | static boolean | |
531 | sparc64_elf_check_relocs (abfd, info, sec, relocs) | |
532 | bfd *abfd; | |
533 | struct bfd_link_info *info; | |
534 | asection *sec; | |
535 | const Elf_Internal_Rela *relocs; | |
536 | { | |
537 | bfd *dynobj; | |
538 | Elf_Internal_Shdr *symtab_hdr; | |
539 | struct elf_link_hash_entry **sym_hashes; | |
540 | bfd_vma *local_got_offsets; | |
541 | const Elf_Internal_Rela *rel; | |
542 | const Elf_Internal_Rela *rel_end; | |
543 | asection *sgot; | |
544 | asection *srelgot; | |
545 | asection *sreloc; | |
546 | ||
547 | if (info->relocateable || !(sec->flags & SEC_ALLOC)) | |
548 | return true; | |
549 | ||
550 | dynobj = elf_hash_table (info)->dynobj; | |
551 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
552 | sym_hashes = elf_sym_hashes (abfd); | |
553 | local_got_offsets = elf_local_got_offsets (abfd); | |
554 | ||
555 | sgot = NULL; | |
556 | srelgot = NULL; | |
557 | sreloc = NULL; | |
558 | ||
559 | rel_end = relocs + sec->reloc_count; | |
560 | for (rel = relocs; rel < rel_end; rel++) | |
561 | { | |
562 | unsigned long r_symndx; | |
563 | struct elf_link_hash_entry *h; | |
564 | ||
565 | r_symndx = ELF64_R_SYM (rel->r_info); | |
566 | if (r_symndx < symtab_hdr->sh_info) | |
567 | h = NULL; | |
568 | else | |
569 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
570 | ||
571 | switch (ELF64_R_TYPE (rel->r_info)) | |
572 | { | |
573 | case R_SPARC_GOT10: | |
574 | case R_SPARC_GOT13: | |
575 | case R_SPARC_GOT22: | |
576 | /* This symbol requires a global offset table entry. */ | |
577 | ||
578 | if (dynobj == NULL) | |
579 | { | |
580 | /* Create the .got section. */ | |
581 | elf_hash_table (info)->dynobj = dynobj = abfd; | |
582 | if (! _bfd_elf_create_got_section (dynobj, info)) | |
583 | return false; | |
584 | } | |
585 | ||
586 | if (sgot == NULL) | |
587 | { | |
588 | sgot = bfd_get_section_by_name (dynobj, ".got"); | |
589 | BFD_ASSERT (sgot != NULL); | |
590 | } | |
591 | ||
592 | if (srelgot == NULL && (h != NULL || info->shared)) | |
593 | { | |
594 | srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); | |
595 | if (srelgot == NULL) | |
596 | { | |
597 | srelgot = bfd_make_section (dynobj, ".rela.got"); | |
598 | if (srelgot == NULL | |
599 | || ! bfd_set_section_flags (dynobj, srelgot, | |
600 | (SEC_ALLOC | |
601 | | SEC_LOAD | |
602 | | SEC_HAS_CONTENTS | |
603 | | SEC_IN_MEMORY | |
604 | | SEC_LINKER_CREATED | |
605 | | SEC_READONLY)) | |
606 | || ! bfd_set_section_alignment (dynobj, srelgot, 3)) | |
607 | return false; | |
608 | } | |
609 | } | |
610 | ||
611 | if (h != NULL) | |
612 | { | |
613 | if (h->got.offset != (bfd_vma) -1) | |
614 | { | |
615 | /* We have already allocated space in the .got. */ | |
616 | break; | |
617 | } | |
618 | h->got.offset = sgot->_raw_size; | |
619 | ||
620 | /* Make sure this symbol is output as a dynamic symbol. */ | |
621 | if (h->dynindx == -1) | |
622 | { | |
623 | if (! bfd_elf64_link_record_dynamic_symbol (info, h)) | |
624 | return false; | |
625 | } | |
626 | ||
627 | srelgot->_raw_size += sizeof (Elf64_External_Rela); | |
628 | } | |
629 | else | |
630 | { | |
631 | /* This is a global offset table entry for a local | |
632 | symbol. */ | |
633 | if (local_got_offsets == NULL) | |
634 | { | |
635 | size_t size; | |
636 | register unsigned int i; | |
637 | ||
638 | size = symtab_hdr->sh_info * sizeof (bfd_vma); | |
639 | local_got_offsets = (bfd_vma *) bfd_alloc (abfd, size); | |
640 | if (local_got_offsets == NULL) | |
641 | return false; | |
642 | elf_local_got_offsets (abfd) = local_got_offsets; | |
643 | for (i = 0; i < symtab_hdr->sh_info; i++) | |
644 | local_got_offsets[i] = (bfd_vma) -1; | |
645 | } | |
646 | if (local_got_offsets[r_symndx] != (bfd_vma) -1) | |
647 | { | |
648 | /* We have already allocated space in the .got. */ | |
649 | break; | |
650 | } | |
651 | local_got_offsets[r_symndx] = sgot->_raw_size; | |
652 | ||
653 | if (info->shared) | |
654 | { | |
655 | /* If we are generating a shared object, we need to | |
656 | output a R_SPARC_RELATIVE reloc so that the | |
657 | dynamic linker can adjust this GOT entry. */ | |
658 | srelgot->_raw_size += sizeof (Elf64_External_Rela); | |
659 | } | |
660 | } | |
661 | ||
662 | sgot->_raw_size += 8; | |
663 | ||
664 | #if 0 | |
665 | /* Doesn't work for 64-bit -fPIC, since sethi/or builds | |
666 | unsigned numbers. If we permit ourselves to modify | |
667 | code so we get sethi/xor, this could work. | |
668 | Question: do we consider conditionally re-enabling | |
669 | this for -fpic, once we know about object code models? */ | |
670 | /* If the .got section is more than 0x1000 bytes, we add | |
671 | 0x1000 to the value of _GLOBAL_OFFSET_TABLE_, so that 13 | |
672 | bit relocations have a greater chance of working. */ | |
673 | if (sgot->_raw_size >= 0x1000 | |
674 | && elf_hash_table (info)->hgot->root.u.def.value == 0) | |
675 | elf_hash_table (info)->hgot->root.u.def.value = 0x1000; | |
676 | #endif | |
677 | ||
678 | break; | |
679 | ||
680 | case R_SPARC_WPLT30: | |
681 | case R_SPARC_PLT32: | |
682 | case R_SPARC_HIPLT22: | |
683 | case R_SPARC_LOPLT10: | |
684 | case R_SPARC_PCPLT32: | |
685 | case R_SPARC_PCPLT22: | |
686 | case R_SPARC_PCPLT10: | |
687 | case R_SPARC_PLT64: | |
688 | /* This symbol requires a procedure linkage table entry. We | |
689 | actually build the entry in adjust_dynamic_symbol, | |
690 | because this might be a case of linking PIC code without | |
691 | linking in any dynamic objects, in which case we don't | |
692 | need to generate a procedure linkage table after all. */ | |
693 | ||
694 | if (h == NULL) | |
695 | { | |
696 | /* It does not make sense to have a procedure linkage | |
697 | table entry for a local symbol. */ | |
698 | bfd_set_error (bfd_error_bad_value); | |
699 | return false; | |
700 | } | |
701 | ||
702 | /* Make sure this symbol is output as a dynamic symbol. */ | |
703 | if (h->dynindx == -1) | |
704 | { | |
705 | if (! bfd_elf64_link_record_dynamic_symbol (info, h)) | |
706 | return false; | |
707 | } | |
708 | ||
709 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; | |
710 | break; | |
711 | ||
712 | case R_SPARC_PC10: | |
713 | case R_SPARC_PC22: | |
714 | case R_SPARC_PC_HH22: | |
715 | case R_SPARC_PC_HM10: | |
716 | case R_SPARC_PC_LM22: | |
717 | if (h != NULL | |
718 | && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) | |
719 | break; | |
720 | /* Fall through. */ | |
721 | case R_SPARC_DISP8: | |
722 | case R_SPARC_DISP16: | |
723 | case R_SPARC_DISP32: | |
724 | case R_SPARC_DISP64: | |
725 | case R_SPARC_WDISP30: | |
726 | case R_SPARC_WDISP22: | |
727 | case R_SPARC_WDISP19: | |
728 | case R_SPARC_WDISP16: | |
729 | if (h == NULL) | |
730 | break; | |
731 | /* Fall through. */ | |
732 | case R_SPARC_8: | |
733 | case R_SPARC_16: | |
734 | case R_SPARC_32: | |
735 | case R_SPARC_HI22: | |
736 | case R_SPARC_22: | |
737 | case R_SPARC_13: | |
738 | case R_SPARC_LO10: | |
739 | case R_SPARC_UA32: | |
740 | case R_SPARC_10: | |
741 | case R_SPARC_11: | |
742 | case R_SPARC_64: | |
743 | case R_SPARC_OLO10: | |
744 | case R_SPARC_HH22: | |
745 | case R_SPARC_HM10: | |
746 | case R_SPARC_LM22: | |
747 | case R_SPARC_7: | |
748 | case R_SPARC_5: | |
749 | case R_SPARC_6: | |
750 | case R_SPARC_HIX22: | |
751 | case R_SPARC_LOX10: | |
752 | case R_SPARC_H44: | |
753 | case R_SPARC_M44: | |
754 | case R_SPARC_L44: | |
755 | case R_SPARC_UA64: | |
756 | case R_SPARC_UA16: | |
757 | /* When creating a shared object, we must copy these relocs | |
758 | into the output file. We create a reloc section in | |
759 | dynobj and make room for the reloc. | |
760 | ||
761 | But don't do this for debugging sections -- this shows up | |
762 | with DWARF2 -- first because they are not loaded, and | |
763 | second because DWARF sez the debug info is not to be | |
764 | biased by the load address. */ | |
765 | if (info->shared && (sec->flags & SEC_ALLOC)) | |
766 | { | |
767 | if (sreloc == NULL) | |
768 | { | |
769 | const char *name; | |
770 | ||
771 | name = (bfd_elf_string_from_elf_section | |
772 | (abfd, | |
773 | elf_elfheader (abfd)->e_shstrndx, | |
774 | elf_section_data (sec)->rel_hdr.sh_name)); | |
775 | if (name == NULL) | |
776 | return false; | |
777 | ||
778 | BFD_ASSERT (strncmp (name, ".rela", 5) == 0 | |
779 | && strcmp (bfd_get_section_name (abfd, sec), | |
780 | name + 5) == 0); | |
781 | ||
782 | sreloc = bfd_get_section_by_name (dynobj, name); | |
783 | if (sreloc == NULL) | |
784 | { | |
785 | flagword flags; | |
786 | ||
787 | sreloc = bfd_make_section (dynobj, name); | |
788 | flags = (SEC_HAS_CONTENTS | SEC_READONLY | |
789 | | SEC_IN_MEMORY | SEC_LINKER_CREATED); | |
790 | if ((sec->flags & SEC_ALLOC) != 0) | |
791 | flags |= SEC_ALLOC | SEC_LOAD; | |
792 | if (sreloc == NULL | |
793 | || ! bfd_set_section_flags (dynobj, sreloc, flags) | |
794 | || ! bfd_set_section_alignment (dynobj, sreloc, 3)) | |
795 | return false; | |
796 | } | |
797 | } | |
798 | ||
799 | sreloc->_raw_size += sizeof (Elf64_External_Rela); | |
800 | } | |
801 | break; | |
802 | ||
803 | case R_SPARC_REGISTER: | |
804 | /* Nothing to do. */ | |
805 | break; | |
806 | ||
807 | default: | |
808 | (*_bfd_error_handler)(_("%s: check_relocs: unhandled reloc type %d"), | |
809 | bfd_get_filename(abfd), | |
810 | ELF64_R_TYPE (rel->r_info)); | |
811 | return false; | |
812 | } | |
813 | } | |
814 | ||
815 | return true; | |
816 | } | |
817 | ||
818 | /* Adjust a symbol defined by a dynamic object and referenced by a | |
819 | regular object. The current definition is in some section of the | |
820 | dynamic object, but we're not including those sections. We have to | |
821 | change the definition to something the rest of the link can | |
822 | understand. */ | |
823 | ||
824 | static boolean | |
825 | sparc64_elf_adjust_dynamic_symbol (info, h) | |
826 | struct bfd_link_info *info; | |
827 | struct elf_link_hash_entry *h; | |
828 | { | |
829 | bfd *dynobj; | |
830 | asection *s; | |
831 | unsigned int power_of_two; | |
832 | ||
833 | dynobj = elf_hash_table (info)->dynobj; | |
834 | ||
835 | /* Make sure we know what is going on here. */ | |
836 | BFD_ASSERT (dynobj != NULL | |
837 | && ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) | |
838 | || h->weakdef != NULL | |
839 | || ((h->elf_link_hash_flags | |
840 | & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
841 | && (h->elf_link_hash_flags | |
842 | & ELF_LINK_HASH_REF_REGULAR) != 0 | |
843 | && (h->elf_link_hash_flags | |
844 | & ELF_LINK_HASH_DEF_REGULAR) == 0))); | |
845 | ||
846 | /* If this is a function, put it in the procedure linkage table. We | |
847 | will fill in the contents of the procedure linkage table later | |
848 | (although we could actually do it here). The STT_NOTYPE | |
849 | condition is a hack specifically for the Oracle libraries | |
850 | delivered for Solaris; for some inexplicable reason, they define | |
851 | some of their functions as STT_NOTYPE when they really should be | |
852 | STT_FUNC. */ | |
853 | if (h->type == STT_FUNC | |
854 | || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0 | |
855 | || (h->type == STT_NOTYPE | |
856 | && (h->root.type == bfd_link_hash_defined | |
857 | || h->root.type == bfd_link_hash_defweak) | |
858 | && (h->root.u.def.section->flags & SEC_CODE) != 0)) | |
859 | { | |
860 | if (! elf_hash_table (info)->dynamic_sections_created) | |
861 | { | |
862 | /* This case can occur if we saw a WPLT30 reloc in an input | |
863 | file, but none of the input files were dynamic objects. | |
864 | In such a case, we don't actually need to build a | |
865 | procedure linkage table, and we can just do a WDISP30 | |
866 | reloc instead. */ | |
867 | BFD_ASSERT ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0); | |
868 | return true; | |
869 | } | |
870 | ||
871 | s = bfd_get_section_by_name (dynobj, ".plt"); | |
872 | BFD_ASSERT (s != NULL); | |
873 | ||
874 | /* The first four bit in .plt is reserved. */ | |
875 | if (s->_raw_size == 0) | |
876 | s->_raw_size = PLT_HEADER_SIZE; | |
877 | ||
878 | /* If this symbol is not defined in a regular file, and we are | |
879 | not generating a shared library, then set the symbol to this | |
880 | location in the .plt. This is required to make function | |
881 | pointers compare as equal between the normal executable and | |
882 | the shared library. */ | |
883 | if (! info->shared | |
884 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
885 | { | |
886 | h->root.u.def.section = s; | |
887 | h->root.u.def.value = s->_raw_size; | |
888 | } | |
889 | ||
890 | /* To simplify matters later, just store the plt index here. */ | |
891 | h->plt.offset = s->_raw_size / PLT_ENTRY_SIZE; | |
892 | ||
893 | /* Make room for this entry. */ | |
894 | s->_raw_size += PLT_ENTRY_SIZE; | |
895 | ||
896 | /* We also need to make an entry in the .rela.plt section. */ | |
897 | ||
898 | s = bfd_get_section_by_name (dynobj, ".rela.plt"); | |
899 | BFD_ASSERT (s != NULL); | |
900 | ||
901 | /* The first plt entries are reserved, and the relocations must | |
902 | pair up exactly. */ | |
903 | if (s->_raw_size == 0) | |
904 | s->_raw_size += (PLT_HEADER_SIZE/PLT_ENTRY_SIZE | |
905 | * sizeof (Elf64_External_Rela)); | |
906 | ||
907 | s->_raw_size += sizeof (Elf64_External_Rela); | |
908 | ||
909 | /* The procedure linkage table size is bounded by the magnitude | |
910 | of the offset we can describe in the entry. */ | |
911 | if (s->_raw_size >= (bfd_vma)1 << 32) | |
912 | { | |
913 | bfd_set_error (bfd_error_bad_value); | |
914 | return false; | |
915 | } | |
916 | ||
917 | return true; | |
918 | } | |
919 | ||
920 | /* If this is a weak symbol, and there is a real definition, the | |
921 | processor independent code will have arranged for us to see the | |
922 | real definition first, and we can just use the same value. */ | |
923 | if (h->weakdef != NULL) | |
924 | { | |
925 | BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined | |
926 | || h->weakdef->root.type == bfd_link_hash_defweak); | |
927 | h->root.u.def.section = h->weakdef->root.u.def.section; | |
928 | h->root.u.def.value = h->weakdef->root.u.def.value; | |
929 | return true; | |
930 | } | |
931 | ||
932 | /* This is a reference to a symbol defined by a dynamic object which | |
933 | is not a function. */ | |
934 | ||
935 | /* If we are creating a shared library, we must presume that the | |
936 | only references to the symbol are via the global offset table. | |
937 | For such cases we need not do anything here; the relocations will | |
938 | be handled correctly by relocate_section. */ | |
939 | if (info->shared) | |
940 | return true; | |
941 | ||
942 | /* We must allocate the symbol in our .dynbss section, which will | |
943 | become part of the .bss section of the executable. There will be | |
944 | an entry for this symbol in the .dynsym section. The dynamic | |
945 | object will contain position independent code, so all references | |
946 | from the dynamic object to this symbol will go through the global | |
947 | offset table. The dynamic linker will use the .dynsym entry to | |
948 | determine the address it must put in the global offset table, so | |
949 | both the dynamic object and the regular object will refer to the | |
950 | same memory location for the variable. */ | |
951 | ||
952 | s = bfd_get_section_by_name (dynobj, ".dynbss"); | |
953 | BFD_ASSERT (s != NULL); | |
954 | ||
955 | /* We must generate a R_SPARC_COPY reloc to tell the dynamic linker | |
956 | to copy the initial value out of the dynamic object and into the | |
957 | runtime process image. We need to remember the offset into the | |
958 | .rel.bss section we are going to use. */ | |
959 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) | |
960 | { | |
961 | asection *srel; | |
962 | ||
963 | srel = bfd_get_section_by_name (dynobj, ".rela.bss"); | |
964 | BFD_ASSERT (srel != NULL); | |
965 | srel->_raw_size += sizeof (Elf64_External_Rela); | |
966 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY; | |
967 | } | |
968 | ||
969 | /* We need to figure out the alignment required for this symbol. I | |
970 | have no idea how ELF linkers handle this. 16-bytes is the size | |
971 | of the largest type that requires hard alignment -- long double. */ | |
972 | power_of_two = bfd_log2 (h->size); | |
973 | if (power_of_two > 4) | |
974 | power_of_two = 4; | |
975 | ||
976 | /* Apply the required alignment. */ | |
977 | s->_raw_size = BFD_ALIGN (s->_raw_size, | |
978 | (bfd_size_type) (1 << power_of_two)); | |
979 | if (power_of_two > bfd_get_section_alignment (dynobj, s)) | |
980 | { | |
981 | if (! bfd_set_section_alignment (dynobj, s, power_of_two)) | |
982 | return false; | |
983 | } | |
984 | ||
985 | /* Define the symbol as being at this point in the section. */ | |
986 | h->root.u.def.section = s; | |
987 | h->root.u.def.value = s->_raw_size; | |
988 | ||
989 | /* Increment the section size to make room for the symbol. */ | |
990 | s->_raw_size += h->size; | |
991 | ||
992 | return true; | |
993 | } | |
994 | ||
995 | /* Set the sizes of the dynamic sections. */ | |
996 | ||
997 | static boolean | |
998 | sparc64_elf_size_dynamic_sections (output_bfd, info) | |
999 | bfd *output_bfd; | |
1000 | struct bfd_link_info *info; | |
1001 | { | |
1002 | bfd *dynobj; | |
1003 | asection *s; | |
1004 | boolean reltext; | |
1005 | boolean relplt; | |
1006 | ||
1007 | dynobj = elf_hash_table (info)->dynobj; | |
1008 | BFD_ASSERT (dynobj != NULL); | |
1009 | ||
1010 | if (elf_hash_table (info)->dynamic_sections_created) | |
1011 | { | |
1012 | /* Set the contents of the .interp section to the interpreter. */ | |
1013 | if (! info->shared) | |
1014 | { | |
1015 | s = bfd_get_section_by_name (dynobj, ".interp"); | |
1016 | BFD_ASSERT (s != NULL); | |
1017 | s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER; | |
1018 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; | |
1019 | } | |
1020 | } | |
1021 | else | |
1022 | { | |
1023 | /* We may have created entries in the .rela.got section. | |
1024 | However, if we are not creating the dynamic sections, we will | |
1025 | not actually use these entries. Reset the size of .rela.got, | |
1026 | which will cause it to get stripped from the output file | |
1027 | below. */ | |
1028 | s = bfd_get_section_by_name (dynobj, ".rela.got"); | |
1029 | if (s != NULL) | |
1030 | s->_raw_size = 0; | |
1031 | } | |
1032 | ||
1033 | /* The check_relocs and adjust_dynamic_symbol entry points have | |
1034 | determined the sizes of the various dynamic sections. Allocate | |
1035 | memory for them. */ | |
1036 | reltext = false; | |
1037 | relplt = false; | |
1038 | for (s = dynobj->sections; s != NULL; s = s->next) | |
1039 | { | |
1040 | const char *name; | |
1041 | boolean strip; | |
1042 | ||
1043 | if ((s->flags & SEC_LINKER_CREATED) == 0) | |
1044 | continue; | |
1045 | ||
1046 | /* It's OK to base decisions on the section name, because none | |
1047 | of the dynobj section names depend upon the input files. */ | |
1048 | name = bfd_get_section_name (dynobj, s); | |
1049 | ||
1050 | strip = false; | |
1051 | ||
1052 | if (strncmp (name, ".rela", 5) == 0) | |
1053 | { | |
1054 | if (s->_raw_size == 0) | |
1055 | { | |
1056 | /* If we don't need this section, strip it from the | |
1057 | output file. This is to handle .rela.bss and | |
1058 | .rel.plt. We must create it in | |
1059 | create_dynamic_sections, because it must be created | |
1060 | before the linker maps input sections to output | |
1061 | sections. The linker does that before | |
1062 | adjust_dynamic_symbol is called, and it is that | |
1063 | function which decides whether anything needs to go | |
1064 | into these sections. */ | |
1065 | strip = true; | |
1066 | } | |
1067 | else | |
1068 | { | |
1069 | const char *outname; | |
1070 | asection *target; | |
1071 | ||
1072 | /* If this relocation section applies to a read only | |
1073 | section, then we probably need a DT_TEXTREL entry. */ | |
1074 | outname = bfd_get_section_name (output_bfd, | |
1075 | s->output_section); | |
1076 | target = bfd_get_section_by_name (output_bfd, outname + 5); | |
1077 | if (target != NULL | |
1078 | && (target->flags & SEC_READONLY) != 0) | |
1079 | reltext = true; | |
1080 | ||
1081 | if (strcmp (name, ".rela.plt") == 0) | |
1082 | relplt = true; | |
1083 | ||
1084 | /* We use the reloc_count field as a counter if we need | |
1085 | to copy relocs into the output file. */ | |
1086 | s->reloc_count = 0; | |
1087 | } | |
1088 | } | |
1089 | else if (strcmp (name, ".plt") != 0 | |
1090 | && strncmp (name, ".got", 4) != 0) | |
1091 | { | |
1092 | /* It's not one of our sections, so don't allocate space. */ | |
1093 | continue; | |
1094 | } | |
1095 | ||
1096 | if (strip) | |
1097 | { | |
1098 | _bfd_strip_section_from_output (s); | |
1099 | continue; | |
1100 | } | |
1101 | ||
1102 | /* Allocate memory for the section contents. Zero the memory | |
1103 | for the benefit of .rela.plt, which has 4 unused entries | |
1104 | at the beginning, and we don't want garbage. */ | |
1105 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size); | |
1106 | if (s->contents == NULL && s->_raw_size != 0) | |
1107 | return false; | |
1108 | } | |
1109 | ||
1110 | if (elf_hash_table (info)->dynamic_sections_created) | |
1111 | { | |
1112 | /* Add some entries to the .dynamic section. We fill in the | |
1113 | values later, in sparc64_elf_finish_dynamic_sections, but we | |
1114 | must add the entries now so that we get the correct size for | |
1115 | the .dynamic section. The DT_DEBUG entry is filled in by the | |
1116 | dynamic linker and used by the debugger. */ | |
1117 | if (! info->shared) | |
1118 | { | |
1119 | if (! bfd_elf64_add_dynamic_entry (info, DT_DEBUG, 0)) | |
1120 | return false; | |
1121 | } | |
1122 | ||
1123 | if (relplt) | |
1124 | { | |
1125 | if (! bfd_elf64_add_dynamic_entry (info, DT_PLTGOT, 0) | |
1126 | || ! bfd_elf64_add_dynamic_entry (info, DT_PLTRELSZ, 0) | |
1127 | || ! bfd_elf64_add_dynamic_entry (info, DT_PLTREL, DT_RELA) | |
1128 | || ! bfd_elf64_add_dynamic_entry (info, DT_JMPREL, 0) | |
1129 | || ! bfd_elf64_add_dynamic_entry (info, DT_SPARC_PLTFMT, | |
1130 | (info->shared != 0) + 1)) | |
1131 | return false; | |
1132 | } | |
1133 | ||
1134 | if (! bfd_elf64_add_dynamic_entry (info, DT_RELA, 0) | |
1135 | || ! bfd_elf64_add_dynamic_entry (info, DT_RELASZ, 0) | |
1136 | || ! bfd_elf64_add_dynamic_entry (info, DT_RELAENT, | |
1137 | sizeof (Elf64_External_Rela))) | |
1138 | return false; | |
1139 | ||
1140 | if (reltext) | |
1141 | { | |
1142 | if (! bfd_elf64_add_dynamic_entry (info, DT_TEXTREL, 0)) | |
1143 | return false; | |
1144 | } | |
1145 | } | |
1146 | ||
252b5132 RH |
1147 | return true; |
1148 | } | |
252b5132 RH |
1149 | \f |
1150 | /* Relocate a SPARC64 ELF section. */ | |
1151 | ||
1152 | static boolean | |
1153 | sparc64_elf_relocate_section (output_bfd, info, input_bfd, input_section, | |
1154 | contents, relocs, local_syms, local_sections) | |
1155 | bfd *output_bfd; | |
1156 | struct bfd_link_info *info; | |
1157 | bfd *input_bfd; | |
1158 | asection *input_section; | |
1159 | bfd_byte *contents; | |
1160 | Elf_Internal_Rela *relocs; | |
1161 | Elf_Internal_Sym *local_syms; | |
1162 | asection **local_sections; | |
1163 | { | |
1164 | bfd *dynobj; | |
1165 | Elf_Internal_Shdr *symtab_hdr; | |
1166 | struct elf_link_hash_entry **sym_hashes; | |
1167 | bfd_vma *local_got_offsets; | |
1168 | bfd_vma got_base; | |
1169 | asection *sgot; | |
1170 | asection *splt; | |
1171 | asection *sreloc; | |
1172 | Elf_Internal_Rela *rel; | |
1173 | Elf_Internal_Rela *relend; | |
1174 | ||
1175 | dynobj = elf_hash_table (info)->dynobj; | |
1176 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
1177 | sym_hashes = elf_sym_hashes (input_bfd); | |
1178 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
1179 | ||
1180 | if (elf_hash_table(info)->hgot == NULL) | |
1181 | got_base = 0; | |
1182 | else | |
1183 | got_base = elf_hash_table (info)->hgot->root.u.def.value; | |
1184 | ||
1185 | sgot = splt = sreloc = NULL; | |
1186 | ||
1187 | rel = relocs; | |
1188 | relend = relocs + input_section->reloc_count; | |
1189 | for (; rel < relend; rel++) | |
1190 | { | |
1191 | int r_type; | |
1192 | reloc_howto_type *howto; | |
1193 | long r_symndx; | |
1194 | struct elf_link_hash_entry *h; | |
1195 | Elf_Internal_Sym *sym; | |
1196 | asection *sec; | |
1197 | bfd_vma relocation; | |
1198 | bfd_reloc_status_type r; | |
1199 | ||
1200 | r_type = ELF64_R_TYPE (rel->r_info); | |
60dac299 | 1201 | if (r_type < 0 || r_type >= (int) R_SPARC_max_std) |
252b5132 RH |
1202 | { |
1203 | bfd_set_error (bfd_error_bad_value); | |
1204 | return false; | |
1205 | } | |
1206 | howto = sparc64_elf_howto_table + r_type; | |
1207 | ||
1208 | r_symndx = ELF64_R_SYM (rel->r_info); | |
1209 | ||
1210 | if (info->relocateable) | |
1211 | { | |
1212 | /* This is a relocateable link. We don't have to change | |
1213 | anything, unless the reloc is against a section symbol, | |
1214 | in which case we have to adjust according to where the | |
1215 | section symbol winds up in the output section. */ | |
1216 | if (r_symndx < symtab_hdr->sh_info) | |
1217 | { | |
1218 | sym = local_syms + r_symndx; | |
1219 | if (ELF_ST_TYPE (sym->st_info) == STT_SECTION) | |
1220 | { | |
1221 | sec = local_sections[r_symndx]; | |
1222 | rel->r_addend += sec->output_offset + sym->st_value; | |
1223 | } | |
1224 | } | |
1225 | ||
1226 | continue; | |
1227 | } | |
1228 | ||
1229 | /* This is a final link. */ | |
1230 | h = NULL; | |
1231 | sym = NULL; | |
1232 | sec = NULL; | |
1233 | if (r_symndx < symtab_hdr->sh_info) | |
1234 | { | |
1235 | sym = local_syms + r_symndx; | |
1236 | sec = local_sections[r_symndx]; | |
1237 | relocation = (sec->output_section->vma | |
1238 | + sec->output_offset | |
1239 | + sym->st_value); | |
1240 | } | |
1241 | else | |
1242 | { | |
1243 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
1244 | while (h->root.type == bfd_link_hash_indirect | |
1245 | || h->root.type == bfd_link_hash_warning) | |
1246 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1247 | if (h->root.type == bfd_link_hash_defined | |
1248 | || h->root.type == bfd_link_hash_defweak) | |
1249 | { | |
1250 | boolean skip_it = false; | |
1251 | sec = h->root.u.def.section; | |
1252 | ||
1253 | switch (r_type) | |
1254 | { | |
1255 | case R_SPARC_WPLT30: | |
1256 | case R_SPARC_PLT32: | |
1257 | case R_SPARC_HIPLT22: | |
1258 | case R_SPARC_LOPLT10: | |
1259 | case R_SPARC_PCPLT32: | |
1260 | case R_SPARC_PCPLT22: | |
1261 | case R_SPARC_PCPLT10: | |
1262 | case R_SPARC_PLT64: | |
1263 | if (h->plt.offset != (bfd_vma) -1) | |
1264 | skip_it = true; | |
1265 | break; | |
1266 | ||
1267 | case R_SPARC_GOT10: | |
1268 | case R_SPARC_GOT13: | |
1269 | case R_SPARC_GOT22: | |
1270 | if (elf_hash_table(info)->dynamic_sections_created | |
1271 | && (!info->shared | |
1272 | || (!info->symbolic && h->dynindx != -1) | |
1273 | || !(h->elf_link_hash_flags | |
1274 | & ELF_LINK_HASH_DEF_REGULAR))) | |
1275 | skip_it = true; | |
1276 | break; | |
1277 | ||
1278 | case R_SPARC_PC10: | |
1279 | case R_SPARC_PC22: | |
1280 | case R_SPARC_PC_HH22: | |
1281 | case R_SPARC_PC_HM10: | |
1282 | case R_SPARC_PC_LM22: | |
1283 | if (!strcmp(h->root.root.string, "_GLOBAL_OFFSET_TABLE_")) | |
1284 | break; | |
1285 | /* FALLTHRU */ | |
1286 | ||
1287 | case R_SPARC_8: | |
1288 | case R_SPARC_16: | |
1289 | case R_SPARC_32: | |
1290 | case R_SPARC_DISP8: | |
1291 | case R_SPARC_DISP16: | |
1292 | case R_SPARC_DISP32: | |
1293 | case R_SPARC_WDISP30: | |
1294 | case R_SPARC_WDISP22: | |
1295 | case R_SPARC_HI22: | |
1296 | case R_SPARC_22: | |
1297 | case R_SPARC_13: | |
1298 | case R_SPARC_LO10: | |
1299 | case R_SPARC_UA32: | |
1300 | case R_SPARC_10: | |
1301 | case R_SPARC_11: | |
1302 | case R_SPARC_64: | |
1303 | case R_SPARC_OLO10: | |
1304 | case R_SPARC_HH22: | |
1305 | case R_SPARC_HM10: | |
1306 | case R_SPARC_LM22: | |
1307 | case R_SPARC_WDISP19: | |
1308 | case R_SPARC_WDISP16: | |
1309 | case R_SPARC_7: | |
1310 | case R_SPARC_5: | |
1311 | case R_SPARC_6: | |
1312 | case R_SPARC_DISP64: | |
1313 | case R_SPARC_HIX22: | |
1314 | case R_SPARC_LOX10: | |
1315 | case R_SPARC_H44: | |
1316 | case R_SPARC_M44: | |
1317 | case R_SPARC_L44: | |
1318 | case R_SPARC_UA64: | |
1319 | case R_SPARC_UA16: | |
1320 | if (info->shared | |
1321 | && ((!info->symbolic && h->dynindx != -1) | |
1322 | || !(h->elf_link_hash_flags | |
1323 | & ELF_LINK_HASH_DEF_REGULAR))) | |
1324 | skip_it = true; | |
1325 | break; | |
1326 | } | |
1327 | ||
1328 | if (skip_it) | |
1329 | { | |
1330 | /* In these cases, we don't need the relocation | |
1331 | value. We check specially because in some | |
1332 | obscure cases sec->output_section will be NULL. */ | |
1333 | relocation = 0; | |
1334 | } | |
1335 | else | |
1336 | { | |
1337 | relocation = (h->root.u.def.value | |
1338 | + sec->output_section->vma | |
1339 | + sec->output_offset); | |
1340 | } | |
1341 | } | |
1342 | else if (h->root.type == bfd_link_hash_undefweak) | |
1343 | relocation = 0; | |
1344 | else if (info->shared && !info->symbolic && !info->no_undefined) | |
1345 | relocation = 0; | |
1346 | else | |
1347 | { | |
1348 | if (! ((*info->callbacks->undefined_symbol) | |
1349 | (info, h->root.root.string, input_bfd, | |
1350 | input_section, rel->r_offset))) | |
1351 | return false; | |
1352 | relocation = 0; | |
1353 | } | |
1354 | } | |
1355 | ||
1356 | /* When generating a shared object, these relocations are copied | |
1357 | into the output file to be resolved at run time. */ | |
1358 | if (info->shared && (input_section->flags & SEC_ALLOC)) | |
1359 | { | |
1360 | switch (r_type) | |
1361 | { | |
1362 | case R_SPARC_PC10: | |
1363 | case R_SPARC_PC22: | |
1364 | case R_SPARC_PC_HH22: | |
1365 | case R_SPARC_PC_HM10: | |
1366 | case R_SPARC_PC_LM22: | |
1367 | if (h != NULL | |
1368 | && !strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_")) | |
1369 | break; | |
1370 | /* Fall through. */ | |
1371 | case R_SPARC_DISP8: | |
1372 | case R_SPARC_DISP16: | |
1373 | case R_SPARC_DISP32: | |
1374 | case R_SPARC_WDISP30: | |
1375 | case R_SPARC_WDISP22: | |
1376 | case R_SPARC_WDISP19: | |
1377 | case R_SPARC_WDISP16: | |
1378 | case R_SPARC_DISP64: | |
1379 | if (h == NULL) | |
1380 | break; | |
1381 | /* Fall through. */ | |
1382 | case R_SPARC_8: | |
1383 | case R_SPARC_16: | |
1384 | case R_SPARC_32: | |
1385 | case R_SPARC_HI22: | |
1386 | case R_SPARC_22: | |
1387 | case R_SPARC_13: | |
1388 | case R_SPARC_LO10: | |
1389 | case R_SPARC_UA32: | |
1390 | case R_SPARC_10: | |
1391 | case R_SPARC_11: | |
1392 | case R_SPARC_64: | |
1393 | case R_SPARC_OLO10: | |
1394 | case R_SPARC_HH22: | |
1395 | case R_SPARC_HM10: | |
1396 | case R_SPARC_LM22: | |
1397 | case R_SPARC_7: | |
1398 | case R_SPARC_5: | |
1399 | case R_SPARC_6: | |
1400 | case R_SPARC_HIX22: | |
1401 | case R_SPARC_LOX10: | |
1402 | case R_SPARC_H44: | |
1403 | case R_SPARC_M44: | |
1404 | case R_SPARC_L44: | |
1405 | case R_SPARC_UA64: | |
1406 | case R_SPARC_UA16: | |
1407 | { | |
1408 | Elf_Internal_Rela outrel; | |
1409 | boolean skip; | |
1410 | ||
1411 | if (sreloc == NULL) | |
1412 | { | |
1413 | const char *name = | |
1414 | (bfd_elf_string_from_elf_section | |
1415 | (input_bfd, | |
1416 | elf_elfheader (input_bfd)->e_shstrndx, | |
1417 | elf_section_data (input_section)->rel_hdr.sh_name)); | |
1418 | ||
1419 | if (name == NULL) | |
1420 | return false; | |
1421 | ||
1422 | BFD_ASSERT (strncmp (name, ".rela", 5) == 0 | |
1423 | && strcmp (bfd_get_section_name(input_bfd, | |
1424 | input_section), | |
1425 | name + 5) == 0); | |
1426 | ||
1427 | sreloc = bfd_get_section_by_name (dynobj, name); | |
1428 | BFD_ASSERT (sreloc != NULL); | |
1429 | } | |
1430 | ||
1431 | skip = false; | |
1432 | ||
1433 | if (elf_section_data (input_section)->stab_info == NULL) | |
1434 | outrel.r_offset = rel->r_offset; | |
1435 | else | |
1436 | { | |
1437 | bfd_vma off; | |
1438 | ||
1439 | off = (_bfd_stab_section_offset | |
1440 | (output_bfd, &elf_hash_table (info)->stab_info, | |
1441 | input_section, | |
1442 | &elf_section_data (input_section)->stab_info, | |
1443 | rel->r_offset)); | |
1444 | if (off == MINUS_ONE) | |
1445 | skip = true; | |
1446 | outrel.r_offset = off; | |
1447 | } | |
1448 | ||
1449 | outrel.r_offset += (input_section->output_section->vma | |
1450 | + input_section->output_offset); | |
1451 | ||
1452 | /* Optimize unaligned reloc usage now that we know where | |
1453 | it finally resides. */ | |
1454 | switch (r_type) | |
1455 | { | |
1456 | case R_SPARC_16: | |
1457 | if (outrel.r_offset & 1) r_type = R_SPARC_UA16; | |
1458 | break; | |
1459 | case R_SPARC_UA16: | |
1460 | if (!(outrel.r_offset & 1)) r_type = R_SPARC_16; | |
1461 | break; | |
1462 | case R_SPARC_32: | |
1463 | if (outrel.r_offset & 3) r_type = R_SPARC_UA32; | |
1464 | break; | |
1465 | case R_SPARC_UA32: | |
1466 | if (!(outrel.r_offset & 3)) r_type = R_SPARC_32; | |
1467 | break; | |
1468 | case R_SPARC_64: | |
1469 | if (outrel.r_offset & 7) r_type = R_SPARC_UA64; | |
1470 | break; | |
1471 | case R_SPARC_UA64: | |
1472 | if (!(outrel.r_offset & 7)) r_type = R_SPARC_64; | |
1473 | break; | |
1474 | } | |
1475 | ||
1476 | if (skip) | |
1477 | memset (&outrel, 0, sizeof outrel); | |
1478 | /* h->dynindx may be -1 if the symbol was marked to | |
1479 | become local. */ | |
1480 | else if (h != NULL | |
1481 | && ((! info->symbolic && h->dynindx != -1) | |
1482 | || (h->elf_link_hash_flags | |
1483 | & ELF_LINK_HASH_DEF_REGULAR) == 0)) | |
1484 | { | |
1485 | BFD_ASSERT (h->dynindx != -1); | |
1486 | outrel.r_info = ELF64_R_INFO (h->dynindx, r_type); | |
1487 | outrel.r_addend = rel->r_addend; | |
1488 | } | |
1489 | else | |
1490 | { | |
1491 | if (r_type == R_SPARC_64) | |
1492 | { | |
1493 | outrel.r_info = ELF64_R_INFO (0, R_SPARC_RELATIVE); | |
1494 | outrel.r_addend = relocation + rel->r_addend; | |
1495 | } | |
1496 | else | |
1497 | { | |
1498 | long indx; | |
1499 | ||
1500 | if (h == NULL) | |
1501 | sec = local_sections[r_symndx]; | |
1502 | else | |
1503 | { | |
1504 | BFD_ASSERT (h->root.type == bfd_link_hash_defined | |
1505 | || (h->root.type | |
1506 | == bfd_link_hash_defweak)); | |
1507 | sec = h->root.u.def.section; | |
1508 | } | |
1509 | if (sec != NULL && bfd_is_abs_section (sec)) | |
1510 | indx = 0; | |
1511 | else if (sec == NULL || sec->owner == NULL) | |
1512 | { | |
1513 | bfd_set_error (bfd_error_bad_value); | |
1514 | return false; | |
1515 | } | |
1516 | else | |
1517 | { | |
1518 | asection *osec; | |
1519 | ||
1520 | osec = sec->output_section; | |
1521 | indx = elf_section_data (osec)->dynindx; | |
1522 | ||
1523 | /* FIXME: we really should be able to link non-pic | |
1524 | shared libraries. */ | |
1525 | if (indx == 0) | |
1526 | { | |
1527 | BFD_FAIL (); | |
1528 | (*_bfd_error_handler) | |
1529 | (_("%s: probably compiled without -fPIC?"), | |
1530 | bfd_get_filename (input_bfd)); | |
1531 | bfd_set_error (bfd_error_bad_value); | |
1532 | return false; | |
1533 | } | |
1534 | } | |
1535 | ||
1536 | outrel.r_info = ELF64_R_INFO (indx, r_type); | |
1537 | ||
1538 | /* For non-RELATIVE dynamic relocations, we keep the | |
1539 | same symbol, and so generally the same addend. But | |
1540 | we do need to adjust those relocations referencing | |
1541 | sections. */ | |
1542 | outrel.r_addend = rel->r_addend; | |
1543 | if (r_symndx < symtab_hdr->sh_info | |
1544 | && ELF_ST_TYPE (sym->st_info) == STT_SECTION) | |
1545 | outrel.r_addend += sec->output_offset+sym->st_value; | |
1546 | } | |
1547 | } | |
1548 | ||
1549 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, | |
1550 | (((Elf64_External_Rela *) | |
1551 | sreloc->contents) | |
1552 | + sreloc->reloc_count)); | |
1553 | ++sreloc->reloc_count; | |
1554 | ||
1555 | /* This reloc will be computed at runtime, so there's no | |
1556 | need to do anything now, unless this is a RELATIVE | |
1557 | reloc in an unallocated section. */ | |
1558 | if (skip | |
1559 | || (input_section->flags & SEC_ALLOC) != 0 | |
1560 | || ELF64_R_TYPE (outrel.r_info) != R_SPARC_RELATIVE) | |
1561 | continue; | |
1562 | } | |
1563 | break; | |
1564 | } | |
1565 | } | |
1566 | ||
1567 | switch (r_type) | |
1568 | { | |
1569 | case R_SPARC_GOT10: | |
1570 | case R_SPARC_GOT13: | |
1571 | case R_SPARC_GOT22: | |
1572 | /* Relocation is to the entry for this symbol in the global | |
1573 | offset table. */ | |
1574 | if (sgot == NULL) | |
1575 | { | |
1576 | sgot = bfd_get_section_by_name (dynobj, ".got"); | |
1577 | BFD_ASSERT (sgot != NULL); | |
1578 | } | |
1579 | ||
1580 | if (h != NULL) | |
1581 | { | |
1582 | bfd_vma off = h->got.offset; | |
1583 | BFD_ASSERT (off != (bfd_vma) -1); | |
1584 | ||
1585 | if (! elf_hash_table (info)->dynamic_sections_created | |
1586 | || (info->shared | |
1587 | && (info->symbolic || h->dynindx == -1) | |
1588 | && (h->elf_link_hash_flags | |
1589 | & ELF_LINK_HASH_DEF_REGULAR))) | |
1590 | { | |
1591 | /* This is actually a static link, or it is a -Bsymbolic | |
1592 | link and the symbol is defined locally, or the symbol | |
1593 | was forced to be local because of a version file. We | |
1594 | must initialize this entry in the global offset table. | |
1595 | Since the offset must always be a multiple of 8, we | |
1596 | use the least significant bit to record whether we | |
1597 | have initialized it already. | |
1598 | ||
1599 | When doing a dynamic link, we create a .rela.got | |
1600 | relocation entry to initialize the value. This is | |
1601 | done in the finish_dynamic_symbol routine. */ | |
1602 | ||
1603 | if ((off & 1) != 0) | |
1604 | off &= ~1; | |
1605 | else | |
1606 | { | |
1607 | bfd_put_64 (output_bfd, relocation, | |
1608 | sgot->contents + off); | |
1609 | h->got.offset |= 1; | |
1610 | } | |
1611 | } | |
1612 | relocation = sgot->output_offset + off - got_base; | |
1613 | } | |
1614 | else | |
1615 | { | |
1616 | bfd_vma off; | |
1617 | ||
1618 | BFD_ASSERT (local_got_offsets != NULL); | |
1619 | off = local_got_offsets[r_symndx]; | |
1620 | BFD_ASSERT (off != (bfd_vma) -1); | |
1621 | ||
1622 | /* The offset must always be a multiple of 8. We use | |
1623 | the least significant bit to record whether we have | |
1624 | already processed this entry. */ | |
1625 | if ((off & 1) != 0) | |
1626 | off &= ~1; | |
1627 | else | |
1628 | { | |
1629 | bfd_put_64 (output_bfd, relocation, sgot->contents + off); | |
1630 | local_got_offsets[r_symndx] |= 1; | |
1631 | ||
1632 | if (info->shared) | |
1633 | { | |
1634 | asection *srelgot; | |
1635 | Elf_Internal_Rela outrel; | |
1636 | ||
1637 | /* We need to generate a R_SPARC_RELATIVE reloc | |
1638 | for the dynamic linker. */ | |
1639 | srelgot = bfd_get_section_by_name(dynobj, ".rela.got"); | |
1640 | BFD_ASSERT (srelgot != NULL); | |
1641 | ||
1642 | outrel.r_offset = (sgot->output_section->vma | |
1643 | + sgot->output_offset | |
1644 | + off); | |
1645 | outrel.r_info = ELF64_R_INFO (0, R_SPARC_RELATIVE); | |
1646 | outrel.r_addend = relocation; | |
1647 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, | |
1648 | (((Elf64_External_Rela *) | |
1649 | srelgot->contents) | |
1650 | + srelgot->reloc_count)); | |
1651 | ++srelgot->reloc_count; | |
1652 | } | |
1653 | } | |
1654 | relocation = sgot->output_offset + off - got_base; | |
1655 | } | |
1656 | goto do_default; | |
1657 | ||
1658 | case R_SPARC_WPLT30: | |
1659 | case R_SPARC_PLT32: | |
1660 | case R_SPARC_HIPLT22: | |
1661 | case R_SPARC_LOPLT10: | |
1662 | case R_SPARC_PCPLT32: | |
1663 | case R_SPARC_PCPLT22: | |
1664 | case R_SPARC_PCPLT10: | |
1665 | case R_SPARC_PLT64: | |
1666 | /* Relocation is to the entry for this symbol in the | |
1667 | procedure linkage table. */ | |
1668 | BFD_ASSERT (h != NULL); | |
1669 | ||
1670 | if (h->plt.offset == (bfd_vma) -1) | |
1671 | { | |
1672 | /* We didn't make a PLT entry for this symbol. This | |
1673 | happens when statically linking PIC code, or when | |
1674 | using -Bsymbolic. */ | |
1675 | goto do_default; | |
1676 | } | |
1677 | ||
1678 | if (splt == NULL) | |
1679 | { | |
1680 | splt = bfd_get_section_by_name (dynobj, ".plt"); | |
1681 | BFD_ASSERT (splt != NULL); | |
1682 | } | |
1683 | ||
1684 | relocation = (splt->output_section->vma | |
1685 | + splt->output_offset | |
1686 | + sparc64_elf_plt_entry_offset (h->plt.offset)); | |
1687 | goto do_default; | |
1688 | ||
1689 | case R_SPARC_OLO10: | |
1690 | { | |
1691 | bfd_vma x; | |
1692 | ||
1693 | relocation += rel->r_addend; | |
1694 | relocation = (relocation & 0x3ff) + ELF64_R_TYPE_DATA (rel->r_info); | |
1695 | ||
1696 | x = bfd_get_32 (input_bfd, contents + rel->r_offset); | |
1697 | x = (x & ~0x1fff) | (relocation & 0x1fff); | |
1698 | bfd_put_32 (input_bfd, x, contents + rel->r_offset); | |
1699 | ||
1700 | r = bfd_check_overflow (howto->complain_on_overflow, | |
1701 | howto->bitsize, howto->rightshift, | |
1702 | bfd_arch_bits_per_address (input_bfd), | |
1703 | relocation); | |
1704 | } | |
1705 | break; | |
1706 | ||
1707 | case R_SPARC_WDISP16: | |
1708 | { | |
1709 | bfd_vma x; | |
1710 | ||
1711 | relocation += rel->r_addend; | |
1712 | /* Adjust for pc-relative-ness. */ | |
1713 | relocation -= (input_section->output_section->vma | |
1714 | + input_section->output_offset); | |
1715 | relocation -= rel->r_offset; | |
1716 | ||
1717 | x = bfd_get_32 (input_bfd, contents + rel->r_offset); | |
1718 | x = (x & ~0x303fff) | ((((relocation >> 2) & 0xc000) << 6) | |
1719 | | ((relocation >> 2) & 0x3fff)); | |
1720 | bfd_put_32 (input_bfd, x, contents + rel->r_offset); | |
1721 | ||
1722 | r = bfd_check_overflow (howto->complain_on_overflow, | |
1723 | howto->bitsize, howto->rightshift, | |
1724 | bfd_arch_bits_per_address (input_bfd), | |
1725 | relocation); | |
1726 | } | |
1727 | break; | |
1728 | ||
1729 | case R_SPARC_HIX22: | |
1730 | { | |
1731 | bfd_vma x; | |
1732 | ||
1733 | relocation += rel->r_addend; | |
1734 | relocation = relocation ^ MINUS_ONE; | |
1735 | ||
1736 | x = bfd_get_32 (input_bfd, contents + rel->r_offset); | |
1737 | x = (x & ~0x3fffff) | ((relocation >> 10) & 0x3fffff); | |
1738 | bfd_put_32 (input_bfd, x, contents + rel->r_offset); | |
1739 | ||
1740 | r = bfd_check_overflow (howto->complain_on_overflow, | |
1741 | howto->bitsize, howto->rightshift, | |
1742 | bfd_arch_bits_per_address (input_bfd), | |
1743 | relocation); | |
1744 | } | |
1745 | break; | |
1746 | ||
1747 | case R_SPARC_LOX10: | |
1748 | { | |
1749 | bfd_vma x; | |
1750 | ||
1751 | relocation += rel->r_addend; | |
1752 | relocation = (relocation & 0x3ff) | 0x1c00; | |
1753 | ||
1754 | x = bfd_get_32 (input_bfd, contents + rel->r_offset); | |
1755 | x = (x & ~0x1fff) | relocation; | |
1756 | bfd_put_32 (input_bfd, x, contents + rel->r_offset); | |
1757 | ||
1758 | r = bfd_reloc_ok; | |
1759 | } | |
1760 | break; | |
1761 | ||
1762 | default: | |
1763 | do_default: | |
1764 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, | |
1765 | contents, rel->r_offset, | |
1766 | relocation, rel->r_addend); | |
1767 | break; | |
1768 | } | |
1769 | ||
1770 | switch (r) | |
1771 | { | |
1772 | case bfd_reloc_ok: | |
1773 | break; | |
1774 | ||
1775 | default: | |
1776 | case bfd_reloc_outofrange: | |
1777 | abort (); | |
1778 | ||
1779 | case bfd_reloc_overflow: | |
1780 | { | |
1781 | const char *name; | |
1782 | ||
1783 | if (h != NULL) | |
1784 | { | |
1785 | if (h->root.type == bfd_link_hash_undefweak | |
1786 | && howto->pc_relative) | |
1787 | { | |
1788 | /* Assume this is a call protected by other code that | |
1789 | detect the symbol is undefined. If this is the case, | |
1790 | we can safely ignore the overflow. If not, the | |
1791 | program is hosed anyway, and a little warning isn't | |
1792 | going to help. */ | |
1793 | break; | |
1794 | } | |
1795 | ||
1796 | name = h->root.root.string; | |
1797 | } | |
1798 | else | |
1799 | { | |
1800 | name = (bfd_elf_string_from_elf_section | |
1801 | (input_bfd, | |
1802 | symtab_hdr->sh_link, | |
1803 | sym->st_name)); | |
1804 | if (name == NULL) | |
1805 | return false; | |
1806 | if (*name == '\0') | |
1807 | name = bfd_section_name (input_bfd, sec); | |
1808 | } | |
1809 | if (! ((*info->callbacks->reloc_overflow) | |
1810 | (info, name, howto->name, (bfd_vma) 0, | |
1811 | input_bfd, input_section, rel->r_offset))) | |
1812 | return false; | |
1813 | } | |
1814 | break; | |
1815 | } | |
1816 | } | |
1817 | ||
1818 | return true; | |
1819 | } | |
1820 | ||
1821 | /* Finish up dynamic symbol handling. We set the contents of various | |
1822 | dynamic sections here. */ | |
1823 | ||
1824 | static boolean | |
1825 | sparc64_elf_finish_dynamic_symbol (output_bfd, info, h, sym) | |
1826 | bfd *output_bfd; | |
1827 | struct bfd_link_info *info; | |
1828 | struct elf_link_hash_entry *h; | |
1829 | Elf_Internal_Sym *sym; | |
1830 | { | |
1831 | bfd *dynobj; | |
1832 | ||
1833 | dynobj = elf_hash_table (info)->dynobj; | |
1834 | ||
1835 | if (h->plt.offset != (bfd_vma) -1) | |
1836 | { | |
1837 | asection *splt; | |
1838 | asection *srela; | |
1839 | Elf_Internal_Rela rela; | |
1840 | ||
1841 | /* This symbol has an entry in the PLT. Set it up. */ | |
1842 | ||
1843 | BFD_ASSERT (h->dynindx != -1); | |
1844 | ||
1845 | splt = bfd_get_section_by_name (dynobj, ".plt"); | |
1846 | srela = bfd_get_section_by_name (dynobj, ".rela.plt"); | |
1847 | BFD_ASSERT (splt != NULL && srela != NULL); | |
1848 | ||
1849 | /* Fill in the entry in the .rela.plt section. */ | |
1850 | ||
1851 | if (h->plt.offset < LARGE_PLT_THRESHOLD) | |
1852 | { | |
1853 | rela.r_offset = sparc64_elf_plt_entry_offset (h->plt.offset); | |
1854 | rela.r_addend = 0; | |
1855 | } | |
1856 | else | |
1857 | { | |
1858 | int max = splt->_raw_size / PLT_ENTRY_SIZE; | |
1859 | rela.r_offset = sparc64_elf_plt_ptr_offset (h->plt.offset, max); | |
1860 | rela.r_addend = -(sparc64_elf_plt_entry_offset (h->plt.offset) + 4); | |
1861 | } | |
1862 | rela.r_offset += (splt->output_section->vma + splt->output_offset); | |
1863 | rela.r_info = ELF64_R_INFO (h->dynindx, R_SPARC_JMP_SLOT); | |
1864 | ||
1865 | bfd_elf64_swap_reloca_out (output_bfd, &rela, | |
1866 | ((Elf64_External_Rela *) srela->contents | |
1867 | + h->plt.offset)); | |
1868 | ||
1869 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
1870 | { | |
1871 | /* Mark the symbol as undefined, rather than as defined in | |
1872 | the .plt section. Leave the value alone. */ | |
1873 | sym->st_shndx = SHN_UNDEF; | |
1874 | } | |
1875 | } | |
1876 | ||
1877 | if (h->got.offset != (bfd_vma) -1) | |
1878 | { | |
1879 | asection *sgot; | |
1880 | asection *srela; | |
1881 | Elf_Internal_Rela rela; | |
1882 | ||
1883 | /* This symbol has an entry in the GOT. Set it up. */ | |
1884 | ||
1885 | sgot = bfd_get_section_by_name (dynobj, ".got"); | |
1886 | srela = bfd_get_section_by_name (dynobj, ".rela.got"); | |
1887 | BFD_ASSERT (sgot != NULL && srela != NULL); | |
1888 | ||
1889 | rela.r_offset = (sgot->output_section->vma | |
1890 | + sgot->output_offset | |
1891 | + (h->got.offset &~ 1)); | |
1892 | ||
1893 | /* If this is a -Bsymbolic link, and the symbol is defined | |
1894 | locally, we just want to emit a RELATIVE reloc. Likewise if | |
1895 | the symbol was forced to be local because of a version file. | |
1896 | The entry in the global offset table will already have been | |
1897 | initialized in the relocate_section function. */ | |
1898 | if (info->shared | |
1899 | && (info->symbolic || h->dynindx == -1) | |
1900 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)) | |
1901 | { | |
1902 | asection *sec = h->root.u.def.section; | |
1903 | rela.r_info = ELF64_R_INFO (0, R_SPARC_RELATIVE); | |
1904 | rela.r_addend = (h->root.u.def.value | |
1905 | + sec->output_section->vma | |
1906 | + sec->output_offset); | |
1907 | } | |
1908 | else | |
1909 | { | |
1910 | bfd_put_64 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset); | |
1911 | rela.r_info = ELF64_R_INFO (h->dynindx, R_SPARC_GLOB_DAT); | |
1912 | rela.r_addend = 0; | |
1913 | } | |
1914 | ||
1915 | bfd_elf64_swap_reloca_out (output_bfd, &rela, | |
1916 | ((Elf64_External_Rela *) srela->contents | |
1917 | + srela->reloc_count)); | |
1918 | ++srela->reloc_count; | |
1919 | } | |
1920 | ||
1921 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0) | |
1922 | { | |
1923 | asection *s; | |
1924 | Elf_Internal_Rela rela; | |
1925 | ||
1926 | /* This symbols needs a copy reloc. Set it up. */ | |
1927 | ||
1928 | BFD_ASSERT (h->dynindx != -1); | |
1929 | ||
1930 | s = bfd_get_section_by_name (h->root.u.def.section->owner, | |
1931 | ".rela.bss"); | |
1932 | BFD_ASSERT (s != NULL); | |
1933 | ||
1934 | rela.r_offset = (h->root.u.def.value | |
1935 | + h->root.u.def.section->output_section->vma | |
1936 | + h->root.u.def.section->output_offset); | |
1937 | rela.r_info = ELF64_R_INFO (h->dynindx, R_SPARC_COPY); | |
1938 | rela.r_addend = 0; | |
1939 | bfd_elf64_swap_reloca_out (output_bfd, &rela, | |
1940 | ((Elf64_External_Rela *) s->contents | |
1941 | + s->reloc_count)); | |
1942 | ++s->reloc_count; | |
1943 | } | |
1944 | ||
1945 | /* Mark some specially defined symbols as absolute. */ | |
1946 | if (strcmp (h->root.root.string, "_DYNAMIC") == 0 | |
1947 | || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0 | |
1948 | || strcmp (h->root.root.string, "_PROCEDURE_LINKAGE_TABLE_") == 0) | |
1949 | sym->st_shndx = SHN_ABS; | |
1950 | ||
1951 | return true; | |
1952 | } | |
1953 | ||
1954 | /* Finish up the dynamic sections. */ | |
1955 | ||
1956 | static boolean | |
1957 | sparc64_elf_finish_dynamic_sections (output_bfd, info) | |
1958 | bfd *output_bfd; | |
1959 | struct bfd_link_info *info; | |
1960 | { | |
1961 | bfd *dynobj; | |
1962 | asection *sdyn; | |
1963 | asection *sgot; | |
1964 | ||
1965 | dynobj = elf_hash_table (info)->dynobj; | |
1966 | ||
1967 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); | |
1968 | ||
1969 | if (elf_hash_table (info)->dynamic_sections_created) | |
1970 | { | |
1971 | asection *splt; | |
1972 | Elf64_External_Dyn *dyncon, *dynconend; | |
1973 | ||
1974 | splt = bfd_get_section_by_name (dynobj, ".plt"); | |
1975 | BFD_ASSERT (splt != NULL && sdyn != NULL); | |
1976 | ||
1977 | dyncon = (Elf64_External_Dyn *) sdyn->contents; | |
1978 | dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->_raw_size); | |
1979 | for (; dyncon < dynconend; dyncon++) | |
1980 | { | |
1981 | Elf_Internal_Dyn dyn; | |
1982 | const char *name; | |
1983 | boolean size; | |
1984 | ||
1985 | bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn); | |
1986 | ||
1987 | switch (dyn.d_tag) | |
1988 | { | |
1989 | case DT_PLTGOT: name = ".plt"; size = false; break; | |
1990 | case DT_PLTRELSZ: name = ".rela.plt"; size = true; break; | |
1991 | case DT_JMPREL: name = ".rela.plt"; size = false; break; | |
1992 | default: name = NULL; size = false; break; | |
1993 | } | |
1994 | ||
1995 | if (name != NULL) | |
1996 | { | |
1997 | asection *s; | |
1998 | ||
1999 | s = bfd_get_section_by_name (output_bfd, name); | |
2000 | if (s == NULL) | |
2001 | dyn.d_un.d_val = 0; | |
2002 | else | |
2003 | { | |
2004 | if (! size) | |
2005 | dyn.d_un.d_ptr = s->vma; | |
2006 | else | |
2007 | { | |
2008 | if (s->_cooked_size != 0) | |
2009 | dyn.d_un.d_val = s->_cooked_size; | |
2010 | else | |
2011 | dyn.d_un.d_val = s->_raw_size; | |
2012 | } | |
2013 | } | |
2014 | bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon); | |
2015 | } | |
2016 | } | |
2017 | ||
2018 | /* Initialize the contents of the .plt section. */ | |
2019 | if (splt->_raw_size > 0) | |
2020 | { | |
2021 | sparc64_elf_build_plt(output_bfd, splt->contents, | |
2022 | splt->_raw_size / PLT_ENTRY_SIZE); | |
2023 | } | |
2024 | ||
2025 | elf_section_data (splt->output_section)->this_hdr.sh_entsize = | |
2026 | PLT_ENTRY_SIZE; | |
2027 | } | |
2028 | ||
2029 | /* Set the first entry in the global offset table to the address of | |
2030 | the dynamic section. */ | |
2031 | sgot = bfd_get_section_by_name (dynobj, ".got"); | |
2032 | BFD_ASSERT (sgot != NULL); | |
2033 | if (sgot->_raw_size > 0) | |
2034 | { | |
2035 | if (sdyn == NULL) | |
2036 | bfd_put_64 (output_bfd, (bfd_vma) 0, sgot->contents); | |
2037 | else | |
2038 | bfd_put_64 (output_bfd, | |
2039 | sdyn->output_section->vma + sdyn->output_offset, | |
2040 | sgot->contents); | |
2041 | } | |
2042 | ||
2043 | elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 8; | |
2044 | ||
252b5132 RH |
2045 | return true; |
2046 | } | |
2047 | \f | |
2048 | /* Functions for dealing with the e_flags field. */ | |
2049 | ||
2050 | /* Merge backend specific data from an object file to the output | |
2051 | object file when linking. */ | |
2052 | ||
2053 | static boolean | |
2054 | sparc64_elf_merge_private_bfd_data (ibfd, obfd) | |
2055 | bfd *ibfd; | |
2056 | bfd *obfd; | |
2057 | { | |
2058 | boolean error; | |
2059 | flagword new_flags, old_flags; | |
2060 | int new_mm, old_mm; | |
2061 | ||
2062 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour | |
2063 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) | |
2064 | return true; | |
2065 | ||
2066 | new_flags = elf_elfheader (ibfd)->e_flags; | |
2067 | old_flags = elf_elfheader (obfd)->e_flags; | |
2068 | ||
2069 | if (!elf_flags_init (obfd)) /* First call, no flags set */ | |
2070 | { | |
2071 | elf_flags_init (obfd) = true; | |
2072 | elf_elfheader (obfd)->e_flags = new_flags; | |
2073 | } | |
2074 | ||
2075 | else if (new_flags == old_flags) /* Compatible flags are ok */ | |
2076 | ; | |
2077 | ||
2078 | else /* Incompatible flags */ | |
2079 | { | |
2080 | error = false; | |
2081 | ||
2082 | old_flags |= (new_flags & (EF_SPARC_SUN_US1|EF_SPARC_HAL_R1)); | |
2083 | new_flags |= (old_flags & (EF_SPARC_SUN_US1|EF_SPARC_HAL_R1)); | |
2084 | if ((old_flags & (EF_SPARC_SUN_US1|EF_SPARC_HAL_R1)) == | |
2085 | (EF_SPARC_SUN_US1|EF_SPARC_HAL_R1)) | |
2086 | { | |
2087 | error = true; | |
2088 | (*_bfd_error_handler) | |
2089 | (_("%s: linking UltraSPARC specific with HAL specific code"), | |
2090 | bfd_get_filename (ibfd)); | |
2091 | } | |
2092 | ||
2093 | /* Choose the most restrictive memory ordering */ | |
2094 | old_mm = (old_flags & EF_SPARCV9_MM); | |
2095 | new_mm = (new_flags & EF_SPARCV9_MM); | |
2096 | old_flags &= ~EF_SPARCV9_MM; | |
2097 | new_flags &= ~EF_SPARCV9_MM; | |
2098 | if (new_mm < old_mm) old_mm = new_mm; | |
2099 | old_flags |= old_mm; | |
2100 | new_flags |= old_mm; | |
2101 | ||
2102 | /* Warn about any other mismatches */ | |
2103 | if (new_flags != old_flags) | |
2104 | { | |
2105 | error = true; | |
2106 | (*_bfd_error_handler) | |
2107 | (_("%s: uses different e_flags (0x%lx) fields than previous modules (0x%lx)"), | |
2108 | bfd_get_filename (ibfd), (long)new_flags, (long)old_flags); | |
2109 | } | |
2110 | ||
2111 | elf_elfheader (obfd)->e_flags = old_flags; | |
2112 | ||
2113 | if (error) | |
2114 | { | |
2115 | bfd_set_error (bfd_error_bad_value); | |
2116 | return false; | |
2117 | } | |
2118 | } | |
2119 | return true; | |
2120 | } | |
2121 | ||
2122 | \f | |
2123 | /* Set the right machine number for a SPARC64 ELF file. */ | |
2124 | ||
2125 | static boolean | |
2126 | sparc64_elf_object_p (abfd) | |
2127 | bfd *abfd; | |
2128 | { | |
2129 | unsigned long mach = bfd_mach_sparc_v9; | |
2130 | ||
2131 | if (elf_elfheader (abfd)->e_flags & EF_SPARC_SUN_US1) | |
2132 | mach = bfd_mach_sparc_v9a; | |
2133 | return bfd_default_set_arch_mach (abfd, bfd_arch_sparc, mach); | |
2134 | } | |
2135 | ||
2136 | #define TARGET_BIG_SYM bfd_elf64_sparc_vec | |
2137 | #define TARGET_BIG_NAME "elf64-sparc" | |
2138 | #define ELF_ARCH bfd_arch_sparc | |
2139 | #define ELF_MAXPAGESIZE 0x100000 | |
2140 | ||
2141 | /* This is the official ABI value. */ | |
2142 | #define ELF_MACHINE_CODE EM_SPARCV9 | |
2143 | ||
2144 | /* This is the value that we used before the ABI was released. */ | |
2145 | #define ELF_MACHINE_ALT1 EM_OLD_SPARCV9 | |
2146 | ||
2147 | #define elf_info_to_howto \ | |
2148 | sparc64_elf_info_to_howto | |
2149 | #define bfd_elf64_bfd_reloc_type_lookup \ | |
2150 | sparc64_elf_reloc_type_lookup | |
2151 | ||
2152 | #define elf_backend_create_dynamic_sections \ | |
2153 | _bfd_elf_create_dynamic_sections | |
2154 | #define elf_backend_check_relocs \ | |
2155 | sparc64_elf_check_relocs | |
2156 | #define elf_backend_adjust_dynamic_symbol \ | |
2157 | sparc64_elf_adjust_dynamic_symbol | |
2158 | #define elf_backend_size_dynamic_sections \ | |
2159 | sparc64_elf_size_dynamic_sections | |
2160 | #define elf_backend_relocate_section \ | |
2161 | sparc64_elf_relocate_section | |
2162 | #define elf_backend_finish_dynamic_symbol \ | |
2163 | sparc64_elf_finish_dynamic_symbol | |
2164 | #define elf_backend_finish_dynamic_sections \ | |
2165 | sparc64_elf_finish_dynamic_sections | |
2166 | ||
2167 | #define bfd_elf64_bfd_merge_private_bfd_data \ | |
2168 | sparc64_elf_merge_private_bfd_data | |
2169 | ||
2170 | #define elf_backend_object_p \ | |
2171 | sparc64_elf_object_p | |
2172 | ||
2173 | #define elf_backend_want_got_plt 0 | |
2174 | #define elf_backend_plt_readonly 0 | |
2175 | #define elf_backend_want_plt_sym 1 | |
2176 | ||
2177 | /* Section 5.2.4 of the ABI specifies a 256-byte boundary for the table. */ | |
2178 | #define elf_backend_plt_alignment 8 | |
2179 | ||
2180 | #define elf_backend_got_header_size 8 | |
2181 | #define elf_backend_plt_header_size PLT_HEADER_SIZE | |
2182 | ||
2183 | #include "elf64-target.h" |