Commit | Line | Data |
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252b5132 | 1 | /* Motorola 68k series support for 32-bit ELF |
b2a8e766 | 2 | Copyright 1993, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, |
ab96bf03 | 3 | 2004, 2005, 2006, 2007 Free Software Foundation, Inc. |
252b5132 | 4 | |
ae9a127f | 5 | This file is part of BFD, the Binary File Descriptor library. |
252b5132 | 6 | |
ae9a127f NC |
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 | |
cd123cb7 | 9 | the Free Software Foundation; either version 3 of the License, or |
ae9a127f | 10 | (at your option) any later version. |
252b5132 | 11 | |
ae9a127f NC |
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. | |
252b5132 | 16 | |
ae9a127f NC |
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 | |
cd123cb7 NC |
19 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
20 | MA 02110-1301, USA. */ | |
252b5132 | 21 | |
252b5132 | 22 | #include "sysdep.h" |
3db64b00 | 23 | #include "bfd.h" |
252b5132 RH |
24 | #include "bfdlink.h" |
25 | #include "libbfd.h" | |
26 | #include "elf-bfd.h" | |
27 | #include "elf/m68k.h" | |
266abb8f | 28 | #include "opcode/m68k.h" |
252b5132 RH |
29 | |
30 | static reloc_howto_type *reloc_type_lookup | |
31 | PARAMS ((bfd *, bfd_reloc_code_real_type)); | |
32 | static void rtype_to_howto | |
947216bf | 33 | PARAMS ((bfd *, arelent *, Elf_Internal_Rela *)); |
252b5132 RH |
34 | static struct bfd_hash_entry *elf_m68k_link_hash_newfunc |
35 | PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *)); | |
36 | static struct bfd_link_hash_table *elf_m68k_link_hash_table_create | |
37 | PARAMS ((bfd *)); | |
b34976b6 | 38 | static bfd_boolean elf_m68k_check_relocs |
252b5132 RH |
39 | PARAMS ((bfd *, struct bfd_link_info *, asection *, |
40 | const Elf_Internal_Rela *)); | |
b34976b6 | 41 | static bfd_boolean elf_m68k_adjust_dynamic_symbol |
252b5132 | 42 | PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *)); |
b34976b6 | 43 | static bfd_boolean elf_m68k_size_dynamic_sections |
252b5132 | 44 | PARAMS ((bfd *, struct bfd_link_info *)); |
0cca5f05 AS |
45 | static bfd_boolean elf_m68k_discard_copies |
46 | PARAMS ((struct elf_link_hash_entry *, PTR)); | |
b34976b6 | 47 | static bfd_boolean elf_m68k_relocate_section |
252b5132 RH |
48 | PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, |
49 | Elf_Internal_Rela *, Elf_Internal_Sym *, asection **)); | |
b34976b6 | 50 | static bfd_boolean elf_m68k_finish_dynamic_symbol |
252b5132 RH |
51 | PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *, |
52 | Elf_Internal_Sym *)); | |
b34976b6 | 53 | static bfd_boolean elf_m68k_finish_dynamic_sections |
252b5132 RH |
54 | PARAMS ((bfd *, struct bfd_link_info *)); |
55 | ||
b34976b6 | 56 | static bfd_boolean elf32_m68k_set_private_flags |
9e1281c7 | 57 | PARAMS ((bfd *, flagword)); |
b34976b6 | 58 | static bfd_boolean elf32_m68k_merge_private_bfd_data |
9e1281c7 | 59 | PARAMS ((bfd *, bfd *)); |
b34976b6 | 60 | static bfd_boolean elf32_m68k_print_private_bfd_data |
9e1281c7 | 61 | PARAMS ((bfd *, PTR)); |
aa91b392 | 62 | static enum elf_reloc_type_class elf32_m68k_reloc_type_class |
f51e552e | 63 | PARAMS ((const Elf_Internal_Rela *)); |
9e1281c7 | 64 | |
252b5132 | 65 | static reloc_howto_type howto_table[] = { |
b34976b6 AM |
66 | HOWTO(R_68K_NONE, 0, 0, 0, FALSE,0, complain_overflow_dont, bfd_elf_generic_reloc, "R_68K_NONE", FALSE, 0, 0x00000000,FALSE), |
67 | HOWTO(R_68K_32, 0, 2,32, FALSE,0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_32", FALSE, 0, 0xffffffff,FALSE), | |
68 | HOWTO(R_68K_16, 0, 1,16, FALSE,0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_16", FALSE, 0, 0x0000ffff,FALSE), | |
69 | HOWTO(R_68K_8, 0, 0, 8, FALSE,0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_8", FALSE, 0, 0x000000ff,FALSE), | |
70 | HOWTO(R_68K_PC32, 0, 2,32, TRUE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_PC32", FALSE, 0, 0xffffffff,TRUE), | |
71 | HOWTO(R_68K_PC16, 0, 1,16, TRUE, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_PC16", FALSE, 0, 0x0000ffff,TRUE), | |
72 | HOWTO(R_68K_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_PC8", FALSE, 0, 0x000000ff,TRUE), | |
73 | HOWTO(R_68K_GOT32, 0, 2,32, TRUE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_GOT32", FALSE, 0, 0xffffffff,TRUE), | |
74 | HOWTO(R_68K_GOT16, 0, 1,16, TRUE, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_GOT16", FALSE, 0, 0x0000ffff,TRUE), | |
75 | HOWTO(R_68K_GOT8, 0, 0, 8, TRUE, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_GOT8", FALSE, 0, 0x000000ff,TRUE), | |
76 | HOWTO(R_68K_GOT32O, 0, 2,32, FALSE,0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_GOT32O", FALSE, 0, 0xffffffff,FALSE), | |
77 | HOWTO(R_68K_GOT16O, 0, 1,16, FALSE,0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_GOT16O", FALSE, 0, 0x0000ffff,FALSE), | |
78 | HOWTO(R_68K_GOT8O, 0, 0, 8, FALSE,0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_GOT8O", FALSE, 0, 0x000000ff,FALSE), | |
79 | HOWTO(R_68K_PLT32, 0, 2,32, TRUE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_PLT32", FALSE, 0, 0xffffffff,TRUE), | |
80 | HOWTO(R_68K_PLT16, 0, 1,16, TRUE, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_PLT16", FALSE, 0, 0x0000ffff,TRUE), | |
81 | HOWTO(R_68K_PLT8, 0, 0, 8, TRUE, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_PLT8", FALSE, 0, 0x000000ff,TRUE), | |
82 | HOWTO(R_68K_PLT32O, 0, 2,32, FALSE,0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_PLT32O", FALSE, 0, 0xffffffff,FALSE), | |
83 | HOWTO(R_68K_PLT16O, 0, 1,16, FALSE,0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_PLT16O", FALSE, 0, 0x0000ffff,FALSE), | |
84 | HOWTO(R_68K_PLT8O, 0, 0, 8, FALSE,0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_PLT8O", FALSE, 0, 0x000000ff,FALSE), | |
85 | HOWTO(R_68K_COPY, 0, 0, 0, FALSE,0, complain_overflow_dont, bfd_elf_generic_reloc, "R_68K_COPY", FALSE, 0, 0xffffffff,FALSE), | |
86 | HOWTO(R_68K_GLOB_DAT, 0, 2,32, FALSE,0, complain_overflow_dont, bfd_elf_generic_reloc, "R_68K_GLOB_DAT", FALSE, 0, 0xffffffff,FALSE), | |
87 | HOWTO(R_68K_JMP_SLOT, 0, 2,32, FALSE,0, complain_overflow_dont, bfd_elf_generic_reloc, "R_68K_JMP_SLOT", FALSE, 0, 0xffffffff,FALSE), | |
88 | HOWTO(R_68K_RELATIVE, 0, 2,32, FALSE,0, complain_overflow_dont, bfd_elf_generic_reloc, "R_68K_RELATIVE", FALSE, 0, 0xffffffff,FALSE), | |
ae9a127f | 89 | /* GNU extension to record C++ vtable hierarchy. */ |
252b5132 RH |
90 | HOWTO (R_68K_GNU_VTINHERIT, /* type */ |
91 | 0, /* rightshift */ | |
92 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
93 | 0, /* bitsize */ | |
b34976b6 | 94 | FALSE, /* pc_relative */ |
252b5132 RH |
95 | 0, /* bitpos */ |
96 | complain_overflow_dont, /* complain_on_overflow */ | |
97 | NULL, /* special_function */ | |
98 | "R_68K_GNU_VTINHERIT", /* name */ | |
b34976b6 | 99 | FALSE, /* partial_inplace */ |
252b5132 RH |
100 | 0, /* src_mask */ |
101 | 0, /* dst_mask */ | |
b34976b6 | 102 | FALSE), |
ae9a127f | 103 | /* GNU extension to record C++ vtable member usage. */ |
252b5132 RH |
104 | HOWTO (R_68K_GNU_VTENTRY, /* type */ |
105 | 0, /* rightshift */ | |
106 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
107 | 0, /* bitsize */ | |
b34976b6 | 108 | FALSE, /* pc_relative */ |
252b5132 RH |
109 | 0, /* bitpos */ |
110 | complain_overflow_dont, /* complain_on_overflow */ | |
111 | _bfd_elf_rel_vtable_reloc_fn, /* special_function */ | |
112 | "R_68K_GNU_VTENTRY", /* name */ | |
b34976b6 | 113 | FALSE, /* partial_inplace */ |
252b5132 RH |
114 | 0, /* src_mask */ |
115 | 0, /* dst_mask */ | |
b34976b6 | 116 | FALSE), |
252b5132 RH |
117 | }; |
118 | ||
119 | static void | |
120 | rtype_to_howto (abfd, cache_ptr, dst) | |
121089cb | 121 | bfd *abfd ATTRIBUTE_UNUSED; |
252b5132 RH |
122 | arelent *cache_ptr; |
123 | Elf_Internal_Rela *dst; | |
124 | { | |
125 | BFD_ASSERT (ELF32_R_TYPE(dst->r_info) < (unsigned int) R_68K_max); | |
126 | cache_ptr->howto = &howto_table[ELF32_R_TYPE(dst->r_info)]; | |
127 | } | |
128 | ||
129 | #define elf_info_to_howto rtype_to_howto | |
130 | ||
131 | static const struct | |
132 | { | |
133 | bfd_reloc_code_real_type bfd_val; | |
134 | int elf_val; | |
135 | } reloc_map[] = { | |
136 | { BFD_RELOC_NONE, R_68K_NONE }, | |
137 | { BFD_RELOC_32, R_68K_32 }, | |
138 | { BFD_RELOC_16, R_68K_16 }, | |
139 | { BFD_RELOC_8, R_68K_8 }, | |
140 | { BFD_RELOC_32_PCREL, R_68K_PC32 }, | |
141 | { BFD_RELOC_16_PCREL, R_68K_PC16 }, | |
142 | { BFD_RELOC_8_PCREL, R_68K_PC8 }, | |
143 | { BFD_RELOC_32_GOT_PCREL, R_68K_GOT32 }, | |
144 | { BFD_RELOC_16_GOT_PCREL, R_68K_GOT16 }, | |
145 | { BFD_RELOC_8_GOT_PCREL, R_68K_GOT8 }, | |
146 | { BFD_RELOC_32_GOTOFF, R_68K_GOT32O }, | |
147 | { BFD_RELOC_16_GOTOFF, R_68K_GOT16O }, | |
148 | { BFD_RELOC_8_GOTOFF, R_68K_GOT8O }, | |
149 | { BFD_RELOC_32_PLT_PCREL, R_68K_PLT32 }, | |
150 | { BFD_RELOC_16_PLT_PCREL, R_68K_PLT16 }, | |
151 | { BFD_RELOC_8_PLT_PCREL, R_68K_PLT8 }, | |
152 | { BFD_RELOC_32_PLTOFF, R_68K_PLT32O }, | |
153 | { BFD_RELOC_16_PLTOFF, R_68K_PLT16O }, | |
154 | { BFD_RELOC_8_PLTOFF, R_68K_PLT8O }, | |
155 | { BFD_RELOC_NONE, R_68K_COPY }, | |
156 | { BFD_RELOC_68K_GLOB_DAT, R_68K_GLOB_DAT }, | |
157 | { BFD_RELOC_68K_JMP_SLOT, R_68K_JMP_SLOT }, | |
158 | { BFD_RELOC_68K_RELATIVE, R_68K_RELATIVE }, | |
159 | { BFD_RELOC_CTOR, R_68K_32 }, | |
160 | { BFD_RELOC_VTABLE_INHERIT, R_68K_GNU_VTINHERIT }, | |
161 | { BFD_RELOC_VTABLE_ENTRY, R_68K_GNU_VTENTRY }, | |
162 | }; | |
163 | ||
164 | static reloc_howto_type * | |
165 | reloc_type_lookup (abfd, code) | |
121089cb | 166 | bfd *abfd ATTRIBUTE_UNUSED; |
252b5132 RH |
167 | bfd_reloc_code_real_type code; |
168 | { | |
169 | unsigned int i; | |
170 | for (i = 0; i < sizeof (reloc_map) / sizeof (reloc_map[0]); i++) | |
171 | { | |
172 | if (reloc_map[i].bfd_val == code) | |
173 | return &howto_table[reloc_map[i].elf_val]; | |
174 | } | |
175 | return 0; | |
176 | } | |
177 | ||
157090f7 AM |
178 | static reloc_howto_type * |
179 | reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, const char *r_name) | |
180 | { | |
181 | unsigned int i; | |
182 | ||
183 | for (i = 0; i < sizeof (howto_table) / sizeof (howto_table[0]); i++) | |
184 | if (howto_table[i].name != NULL | |
185 | && strcasecmp (howto_table[i].name, r_name) == 0) | |
186 | return &howto_table[i]; | |
187 | ||
188 | return NULL; | |
189 | } | |
190 | ||
252b5132 | 191 | #define bfd_elf32_bfd_reloc_type_lookup reloc_type_lookup |
157090f7 | 192 | #define bfd_elf32_bfd_reloc_name_lookup reloc_name_lookup |
252b5132 | 193 | #define ELF_ARCH bfd_arch_m68k |
252b5132 RH |
194 | \f |
195 | /* Functions for the m68k ELF linker. */ | |
196 | ||
197 | /* The name of the dynamic interpreter. This is put in the .interp | |
198 | section. */ | |
199 | ||
200 | #define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1" | |
201 | ||
cc3e26be RS |
202 | /* Describes one of the various PLT styles. */ |
203 | ||
204 | struct elf_m68k_plt_info | |
205 | { | |
206 | /* The size of each PLT entry. */ | |
207 | bfd_vma size; | |
208 | ||
209 | /* The template for the first PLT entry. */ | |
210 | const bfd_byte *plt0_entry; | |
211 | ||
212 | /* Offsets of fields in PLT0_ENTRY that require R_68K_PC32 relocations. | |
213 | The comments by each member indicate the value that the relocation | |
214 | is against. */ | |
215 | struct { | |
216 | unsigned int got4; /* .got + 4 */ | |
217 | unsigned int got8; /* .got + 8 */ | |
218 | } plt0_relocs; | |
219 | ||
220 | /* The template for a symbol's PLT entry. */ | |
221 | const bfd_byte *symbol_entry; | |
222 | ||
223 | /* Offsets of fields in SYMBOL_ENTRY that require R_68K_PC32 relocations. | |
224 | The comments by each member indicate the value that the relocation | |
225 | is against. */ | |
226 | struct { | |
227 | unsigned int got; /* the symbol's .got.plt entry */ | |
228 | unsigned int plt; /* .plt */ | |
229 | } symbol_relocs; | |
230 | ||
231 | /* The offset of the resolver stub from the start of SYMBOL_ENTRY. | |
232 | The stub starts with "move.l #relocoffset,%d0". */ | |
233 | bfd_vma symbol_resolve_entry; | |
234 | }; | |
235 | ||
252b5132 RH |
236 | /* The size in bytes of an entry in the procedure linkage table. */ |
237 | ||
238 | #define PLT_ENTRY_SIZE 20 | |
239 | ||
240 | /* The first entry in a procedure linkage table looks like this. See | |
241 | the SVR4 ABI m68k supplement to see how this works. */ | |
242 | ||
243 | static const bfd_byte elf_m68k_plt0_entry[PLT_ENTRY_SIZE] = | |
244 | { | |
245 | 0x2f, 0x3b, 0x01, 0x70, /* move.l (%pc,addr),-(%sp) */ | |
cc3e26be | 246 | 0, 0, 0, 2, /* + (.got + 4) - . */ |
252b5132 | 247 | 0x4e, 0xfb, 0x01, 0x71, /* jmp ([%pc,addr]) */ |
cc3e26be | 248 | 0, 0, 0, 2, /* + (.got + 8) - . */ |
252b5132 RH |
249 | 0, 0, 0, 0 /* pad out to 20 bytes. */ |
250 | }; | |
251 | ||
252 | /* Subsequent entries in a procedure linkage table look like this. */ | |
253 | ||
254 | static const bfd_byte elf_m68k_plt_entry[PLT_ENTRY_SIZE] = | |
255 | { | |
256 | 0x4e, 0xfb, 0x01, 0x71, /* jmp ([%pc,symbol@GOTPC]) */ | |
cc3e26be | 257 | 0, 0, 0, 2, /* + (.got.plt entry) - . */ |
252b5132 | 258 | 0x2f, 0x3c, /* move.l #offset,-(%sp) */ |
cc3e26be | 259 | 0, 0, 0, 0, /* + reloc index */ |
252b5132 | 260 | 0x60, 0xff, /* bra.l .plt */ |
cc3e26be | 261 | 0, 0, 0, 0 /* + .plt - . */ |
252b5132 RH |
262 | }; |
263 | ||
cc3e26be RS |
264 | static const struct elf_m68k_plt_info elf_m68k_plt_info = { |
265 | PLT_ENTRY_SIZE, | |
266 | elf_m68k_plt0_entry, { 4, 12 }, | |
267 | elf_m68k_plt_entry, { 4, 16 }, 8 | |
268 | }; | |
238d258f | 269 | |
cc3e26be | 270 | #define ISAB_PLT_ENTRY_SIZE 24 |
238d258f | 271 | |
cc3e26be | 272 | static const bfd_byte elf_isab_plt0_entry[ISAB_PLT_ENTRY_SIZE] = |
238d258f | 273 | { |
cc3e26be RS |
274 | 0x20, 0x3c, /* move.l #offset,%d0 */ |
275 | 0, 0, 0, 0, /* + (.got + 4) - . */ | |
276 | 0x2f, 0x3b, 0x08, 0xfa, /* move.l (-6,%pc,%d0:l),-(%sp) */ | |
277 | 0x20, 0x3c, /* move.l #offset,%d0 */ | |
278 | 0, 0, 0, 0, /* + (.got + 8) - . */ | |
279 | 0x20, 0x7b, 0x08, 0xfa, /* move.l (-6,%pc,%d0:l), %a0 */ | |
238d258f NC |
280 | 0x4e, 0xd0, /* jmp (%a0) */ |
281 | 0x4e, 0x71 /* nop */ | |
282 | }; | |
283 | ||
284 | /* Subsequent entries in a procedure linkage table look like this. */ | |
285 | ||
cc3e26be | 286 | static const bfd_byte elf_isab_plt_entry[ISAB_PLT_ENTRY_SIZE] = |
238d258f | 287 | { |
cc3e26be RS |
288 | 0x20, 0x3c, /* move.l #offset,%d0 */ |
289 | 0, 0, 0, 0, /* + (.got.plt entry) - . */ | |
290 | 0x20, 0x7b, 0x08, 0xfa, /* move.l (-6,%pc,%d0:l), %a0 */ | |
238d258f NC |
291 | 0x4e, 0xd0, /* jmp (%a0) */ |
292 | 0x2f, 0x3c, /* move.l #offset,-(%sp) */ | |
cc3e26be | 293 | 0, 0, 0, 0, /* + reloc index */ |
238d258f | 294 | 0x60, 0xff, /* bra.l .plt */ |
cc3e26be | 295 | 0, 0, 0, 0 /* + .plt - . */ |
238d258f NC |
296 | }; |
297 | ||
cc3e26be RS |
298 | static const struct elf_m68k_plt_info elf_isab_plt_info = { |
299 | ISAB_PLT_ENTRY_SIZE, | |
300 | elf_isab_plt0_entry, { 2, 12 }, | |
301 | elf_isab_plt_entry, { 2, 20 }, 12 | |
302 | }; | |
9e1281c7 | 303 | |
9a2e615a NS |
304 | #define ISAC_PLT_ENTRY_SIZE 24 |
305 | ||
306 | static const bfd_byte elf_isac_plt0_entry[ISAC_PLT_ENTRY_SIZE] = | |
307 | { | |
308 | 0x20, 0x3c, /* move.l #offset,%d0 */ | |
309 | 0, 0, 0, 0, /* replaced with .got + 4 - . */ | |
310 | 0x2e, 0xbb, 0x08, 0xfa, /* move.l (-6,%pc,%d0:l),(%sp) */ | |
311 | 0x20, 0x3c, /* move.l #offset,%d0 */ | |
312 | 0, 0, 0, 0, /* replaced with .got + 8 - . */ | |
313 | 0x20, 0x7b, 0x08, 0xfa, /* move.l (-6,%pc,%d0:l), %a0 */ | |
314 | 0x4e, 0xd0, /* jmp (%a0) */ | |
315 | 0x4e, 0x71 /* nop */ | |
316 | }; | |
317 | ||
318 | /* Subsequent entries in a procedure linkage table look like this. */ | |
319 | ||
320 | static const bfd_byte elf_isac_plt_entry[ISAC_PLT_ENTRY_SIZE] = | |
321 | { | |
322 | 0x20, 0x3c, /* move.l #offset,%d0 */ | |
323 | 0, 0, 0, 0, /* replaced with (.got entry) - . */ | |
324 | 0x20, 0x7b, 0x08, 0xfa, /* move.l (-6,%pc,%d0:l), %a0 */ | |
325 | 0x4e, 0xd0, /* jmp (%a0) */ | |
326 | 0x2f, 0x3c, /* move.l #offset,-(%sp) */ | |
327 | 0, 0, 0, 0, /* replaced with offset into relocation table */ | |
328 | 0x61, 0xff, /* bsr.l .plt */ | |
329 | 0, 0, 0, 0 /* replaced with .plt - . */ | |
330 | }; | |
331 | ||
332 | static const struct elf_m68k_plt_info elf_isac_plt_info = { | |
333 | ISAC_PLT_ENTRY_SIZE, | |
334 | elf_isac_plt0_entry, { 2, 12}, | |
335 | elf_isac_plt_entry, { 2, 20 }, 12 | |
336 | }; | |
337 | ||
cc3e26be | 338 | #define CPU32_PLT_ENTRY_SIZE 24 |
9e1281c7 | 339 | /* Procedure linkage table entries for the cpu32 */ |
cc3e26be | 340 | static const bfd_byte elf_cpu32_plt0_entry[CPU32_PLT_ENTRY_SIZE] = |
9e1281c7 | 341 | { |
6091b433 | 342 | 0x2f, 0x3b, 0x01, 0x70, /* move.l (%pc,addr),-(%sp) */ |
cc3e26be | 343 | 0, 0, 0, 2, /* + (.got + 4) - . */ |
6091b433 | 344 | 0x22, 0x7b, 0x01, 0x70, /* moveal %pc@(0xc), %a1 */ |
cc3e26be | 345 | 0, 0, 0, 2, /* + (.got + 8) - . */ |
6091b433 | 346 | 0x4e, 0xd1, /* jmp %a1@ */ |
9e1281c7 CM |
347 | 0, 0, 0, 0, /* pad out to 24 bytes. */ |
348 | 0, 0 | |
349 | }; | |
350 | ||
cc3e26be | 351 | static const bfd_byte elf_cpu32_plt_entry[CPU32_PLT_ENTRY_SIZE] = |
9e1281c7 | 352 | { |
1ca42bad | 353 | 0x22, 0x7b, 0x01, 0x70, /* moveal %pc@(0xc), %a1 */ |
cc3e26be | 354 | 0, 0, 0, 2, /* + (.got.plt entry) - . */ |
1ca42bad | 355 | 0x4e, 0xd1, /* jmp %a1@ */ |
9e1281c7 | 356 | 0x2f, 0x3c, /* move.l #offset,-(%sp) */ |
cc3e26be | 357 | 0, 0, 0, 0, /* + reloc index */ |
9e1281c7 | 358 | 0x60, 0xff, /* bra.l .plt */ |
cc3e26be | 359 | 0, 0, 0, 0, /* + .plt - . */ |
9e1281c7 CM |
360 | 0, 0 |
361 | }; | |
362 | ||
cc3e26be RS |
363 | static const struct elf_m68k_plt_info elf_cpu32_plt_info = { |
364 | CPU32_PLT_ENTRY_SIZE, | |
365 | elf_cpu32_plt0_entry, { 4, 12 }, | |
366 | elf_cpu32_plt_entry, { 4, 18 }, 10 | |
367 | }; | |
368 | ||
252b5132 RH |
369 | /* The m68k linker needs to keep track of the number of relocs that it |
370 | decides to copy in check_relocs for each symbol. This is so that it | |
371 | can discard PC relative relocs if it doesn't need them when linking | |
372 | with -Bsymbolic. We store the information in a field extending the | |
373 | regular ELF linker hash table. */ | |
374 | ||
375 | /* This structure keeps track of the number of PC relative relocs we have | |
376 | copied for a given symbol. */ | |
377 | ||
378 | struct elf_m68k_pcrel_relocs_copied | |
379 | { | |
380 | /* Next section. */ | |
381 | struct elf_m68k_pcrel_relocs_copied *next; | |
382 | /* A section in dynobj. */ | |
383 | asection *section; | |
384 | /* Number of relocs copied in this section. */ | |
385 | bfd_size_type count; | |
386 | }; | |
387 | ||
388 | /* m68k ELF linker hash entry. */ | |
389 | ||
390 | struct elf_m68k_link_hash_entry | |
391 | { | |
392 | struct elf_link_hash_entry root; | |
393 | ||
394 | /* Number of PC relative relocs copied for this symbol. */ | |
395 | struct elf_m68k_pcrel_relocs_copied *pcrel_relocs_copied; | |
396 | }; | |
397 | ||
0cca5f05 AS |
398 | #define elf_m68k_hash_entry(ent) ((struct elf_m68k_link_hash_entry *) (ent)) |
399 | ||
252b5132 RH |
400 | /* m68k ELF linker hash table. */ |
401 | ||
402 | struct elf_m68k_link_hash_table | |
403 | { | |
404 | struct elf_link_hash_table root; | |
b6152c34 AS |
405 | |
406 | /* Small local sym to section mapping cache. */ | |
407 | struct sym_sec_cache sym_sec; | |
cc3e26be RS |
408 | |
409 | /* The PLT format used by this link, or NULL if the format has not | |
410 | yet been chosen. */ | |
411 | const struct elf_m68k_plt_info *plt_info; | |
252b5132 RH |
412 | }; |
413 | ||
252b5132 RH |
414 | /* Get the m68k ELF linker hash table from a link_info structure. */ |
415 | ||
416 | #define elf_m68k_hash_table(p) \ | |
417 | ((struct elf_m68k_link_hash_table *) (p)->hash) | |
418 | ||
419 | /* Create an entry in an m68k ELF linker hash table. */ | |
420 | ||
421 | static struct bfd_hash_entry * | |
422 | elf_m68k_link_hash_newfunc (entry, table, string) | |
423 | struct bfd_hash_entry *entry; | |
424 | struct bfd_hash_table *table; | |
425 | const char *string; | |
426 | { | |
0cca5f05 | 427 | struct bfd_hash_entry *ret = entry; |
252b5132 RH |
428 | |
429 | /* Allocate the structure if it has not already been allocated by a | |
430 | subclass. */ | |
0cca5f05 AS |
431 | if (ret == NULL) |
432 | ret = bfd_hash_allocate (table, | |
433 | sizeof (struct elf_m68k_link_hash_entry)); | |
434 | if (ret == NULL) | |
435 | return ret; | |
252b5132 RH |
436 | |
437 | /* Call the allocation method of the superclass. */ | |
0cca5f05 AS |
438 | ret = _bfd_elf_link_hash_newfunc (ret, table, string); |
439 | if (ret != NULL) | |
440 | elf_m68k_hash_entry (ret)->pcrel_relocs_copied = NULL; | |
252b5132 | 441 | |
0cca5f05 | 442 | return ret; |
252b5132 RH |
443 | } |
444 | ||
445 | /* Create an m68k ELF linker hash table. */ | |
446 | ||
447 | static struct bfd_link_hash_table * | |
448 | elf_m68k_link_hash_table_create (abfd) | |
449 | bfd *abfd; | |
450 | { | |
451 | struct elf_m68k_link_hash_table *ret; | |
dc810e39 | 452 | bfd_size_type amt = sizeof (struct elf_m68k_link_hash_table); |
252b5132 | 453 | |
e2d34d7d | 454 | ret = (struct elf_m68k_link_hash_table *) bfd_malloc (amt); |
252b5132 RH |
455 | if (ret == (struct elf_m68k_link_hash_table *) NULL) |
456 | return NULL; | |
457 | ||
66eb6687 AM |
458 | if (!_bfd_elf_link_hash_table_init (&ret->root, abfd, |
459 | elf_m68k_link_hash_newfunc, | |
460 | sizeof (struct elf_m68k_link_hash_entry))) | |
252b5132 | 461 | { |
e2d34d7d | 462 | free (ret); |
252b5132 RH |
463 | return NULL; |
464 | } | |
465 | ||
b6152c34 | 466 | ret->sym_sec.abfd = NULL; |
cc3e26be | 467 | ret->plt_info = NULL; |
b6152c34 | 468 | |
252b5132 RH |
469 | return &ret->root.root; |
470 | } | |
471 | ||
266abb8f NS |
472 | /* Set the right machine number. */ |
473 | ||
474 | static bfd_boolean | |
475 | elf32_m68k_object_p (bfd *abfd) | |
476 | { | |
477 | unsigned int mach = 0; | |
478 | unsigned features = 0; | |
479 | flagword eflags = elf_elfheader (abfd)->e_flags; | |
480 | ||
425c6cb0 | 481 | if ((eflags & EF_M68K_ARCH_MASK) == EF_M68K_M68000) |
266abb8f | 482 | features |= m68000; |
425c6cb0 | 483 | else if ((eflags & EF_M68K_ARCH_MASK) == EF_M68K_CPU32) |
3bdcfdf4 KH |
484 | features |= cpu32; |
485 | else if ((eflags & EF_M68K_ARCH_MASK) == EF_M68K_FIDO) | |
486 | features |= fido_a; | |
425c6cb0 | 487 | else |
266abb8f | 488 | { |
c694fd50 | 489 | switch (eflags & EF_M68K_CF_ISA_MASK) |
266abb8f | 490 | { |
c694fd50 | 491 | case EF_M68K_CF_ISA_A_NODIV: |
266abb8f NS |
492 | features |= mcfisa_a; |
493 | break; | |
c694fd50 | 494 | case EF_M68K_CF_ISA_A: |
0b2e31dc NS |
495 | features |= mcfisa_a|mcfhwdiv; |
496 | break; | |
c694fd50 | 497 | case EF_M68K_CF_ISA_A_PLUS: |
0b2e31dc NS |
498 | features |= mcfisa_a|mcfisa_aa|mcfhwdiv|mcfusp; |
499 | break; | |
c694fd50 | 500 | case EF_M68K_CF_ISA_B_NOUSP: |
0b2e31dc NS |
501 | features |= mcfisa_a|mcfisa_b|mcfhwdiv; |
502 | break; | |
c694fd50 | 503 | case EF_M68K_CF_ISA_B: |
0b2e31dc NS |
504 | features |= mcfisa_a|mcfisa_b|mcfhwdiv|mcfusp; |
505 | break; | |
9a2e615a NS |
506 | case EF_M68K_CF_ISA_C: |
507 | features |= mcfisa_a|mcfisa_c|mcfhwdiv|mcfusp; | |
508 | break; | |
8d100c32 KH |
509 | case EF_M68K_CF_ISA_C_NODIV: |
510 | features |= mcfisa_a|mcfisa_c|mcfusp; | |
511 | break; | |
266abb8f | 512 | } |
c694fd50 | 513 | switch (eflags & EF_M68K_CF_MAC_MASK) |
266abb8f | 514 | { |
c694fd50 | 515 | case EF_M68K_CF_MAC: |
266abb8f NS |
516 | features |= mcfmac; |
517 | break; | |
c694fd50 | 518 | case EF_M68K_CF_EMAC: |
266abb8f NS |
519 | features |= mcfemac; |
520 | break; | |
521 | } | |
c694fd50 | 522 | if (eflags & EF_M68K_CF_FLOAT) |
266abb8f NS |
523 | features |= cfloat; |
524 | } | |
525 | ||
526 | mach = bfd_m68k_features_to_mach (features); | |
527 | bfd_default_set_arch_mach (abfd, bfd_arch_m68k, mach); | |
528 | ||
529 | return TRUE; | |
530 | } | |
531 | ||
ae9a127f | 532 | /* Keep m68k-specific flags in the ELF header. */ |
b34976b6 | 533 | static bfd_boolean |
9e1281c7 CM |
534 | elf32_m68k_set_private_flags (abfd, flags) |
535 | bfd *abfd; | |
536 | flagword flags; | |
537 | { | |
538 | elf_elfheader (abfd)->e_flags = flags; | |
b34976b6 AM |
539 | elf_flags_init (abfd) = TRUE; |
540 | return TRUE; | |
9e1281c7 CM |
541 | } |
542 | ||
9e1281c7 CM |
543 | /* Merge backend specific data from an object file to the output |
544 | object file when linking. */ | |
b34976b6 | 545 | static bfd_boolean |
9e1281c7 CM |
546 | elf32_m68k_merge_private_bfd_data (ibfd, obfd) |
547 | bfd *ibfd; | |
548 | bfd *obfd; | |
549 | { | |
550 | flagword out_flags; | |
551 | flagword in_flags; | |
a9d34880 RS |
552 | flagword out_isa; |
553 | flagword in_isa; | |
554 | const bfd_arch_info_type *arch_info; | |
266abb8f | 555 | |
9e1281c7 CM |
556 | if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour |
557 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) | |
266abb8f NS |
558 | return FALSE; |
559 | ||
a9d34880 RS |
560 | /* Get the merged machine. This checks for incompatibility between |
561 | Coldfire & non-Coldfire flags, incompability between different | |
562 | Coldfire ISAs, and incompability between different MAC types. */ | |
563 | arch_info = bfd_arch_get_compatible (ibfd, obfd, FALSE); | |
564 | if (!arch_info) | |
565 | return FALSE; | |
9e1281c7 | 566 | |
a9d34880 RS |
567 | bfd_set_arch_mach (obfd, bfd_arch_m68k, arch_info->mach); |
568 | ||
569 | in_flags = elf_elfheader (ibfd)->e_flags; | |
9e1281c7 CM |
570 | if (!elf_flags_init (obfd)) |
571 | { | |
b34976b6 | 572 | elf_flags_init (obfd) = TRUE; |
266abb8f NS |
573 | out_flags = in_flags; |
574 | } | |
575 | else | |
576 | { | |
a9d34880 | 577 | out_flags = elf_elfheader (obfd)->e_flags; |
425c6cb0 KH |
578 | unsigned int variant_mask; |
579 | ||
580 | if ((in_flags & EF_M68K_ARCH_MASK) == EF_M68K_M68000) | |
581 | variant_mask = 0; | |
582 | else if ((in_flags & EF_M68K_ARCH_MASK) == EF_M68K_CPU32) | |
3bdcfdf4 KH |
583 | variant_mask = 0; |
584 | else if ((in_flags & EF_M68K_ARCH_MASK) == EF_M68K_FIDO) | |
585 | variant_mask = 0; | |
425c6cb0 KH |
586 | else |
587 | variant_mask = EF_M68K_CF_ISA_MASK; | |
588 | ||
589 | in_isa = (in_flags & variant_mask); | |
590 | out_isa = (out_flags & variant_mask); | |
a9d34880 RS |
591 | if (in_isa > out_isa) |
592 | out_flags ^= in_isa ^ out_isa; | |
3bdcfdf4 KH |
593 | if (((in_flags & EF_M68K_ARCH_MASK) == EF_M68K_CPU32 |
594 | && (out_flags & EF_M68K_ARCH_MASK) == EF_M68K_FIDO) | |
595 | || ((in_flags & EF_M68K_ARCH_MASK) == EF_M68K_FIDO | |
596 | && (out_flags & EF_M68K_ARCH_MASK) == EF_M68K_CPU32)) | |
597 | out_flags = EF_M68K_FIDO; | |
598 | else | |
a9d34880 | 599 | out_flags |= in_flags ^ in_isa; |
9e1281c7 | 600 | } |
266abb8f | 601 | elf_elfheader (obfd)->e_flags = out_flags; |
9e1281c7 | 602 | |
b34976b6 | 603 | return TRUE; |
9e1281c7 CM |
604 | } |
605 | ||
ae9a127f | 606 | /* Display the flags field. */ |
b34976b6 | 607 | static bfd_boolean |
9e1281c7 CM |
608 | elf32_m68k_print_private_bfd_data (abfd, ptr) |
609 | bfd *abfd; | |
610 | PTR ptr; | |
611 | { | |
612 | FILE *file = (FILE *) ptr; | |
266abb8f | 613 | flagword eflags = elf_elfheader (abfd)->e_flags; |
9e1281c7 CM |
614 | |
615 | BFD_ASSERT (abfd != NULL && ptr != NULL); | |
616 | ||
617 | /* Print normal ELF private data. */ | |
618 | _bfd_elf_print_private_bfd_data (abfd, ptr); | |
619 | ||
620 | /* Ignore init flag - it may not be set, despite the flags field containing valid data. */ | |
621 | ||
622 | /* xgettext:c-format */ | |
517662d4 | 623 | fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags); |
9e1281c7 | 624 | |
425c6cb0 | 625 | if ((eflags & EF_M68K_ARCH_MASK) == EF_M68K_M68000) |
266abb8f | 626 | fprintf (file, " [m68000]"); |
425c6cb0 | 627 | else if ((eflags & EF_M68K_ARCH_MASK) == EF_M68K_CPU32) |
3bdcfdf4 KH |
628 | fprintf (file, " [cpu32]"); |
629 | else if ((eflags & EF_M68K_ARCH_MASK) == EF_M68K_FIDO) | |
630 | fprintf (file, " [fido]"); | |
425c6cb0 | 631 | else |
266abb8f | 632 | { |
425c6cb0 KH |
633 | if ((eflags & EF_M68K_ARCH_MASK) == EF_M68K_CFV4E) |
634 | fprintf (file, " [cfv4e]"); | |
635 | ||
636 | if (eflags & EF_M68K_CF_ISA_MASK) | |
266abb8f | 637 | { |
425c6cb0 KH |
638 | char const *isa = _("unknown"); |
639 | char const *mac = _("unknown"); | |
640 | char const *additional = ""; | |
641 | ||
642 | switch (eflags & EF_M68K_CF_ISA_MASK) | |
643 | { | |
644 | case EF_M68K_CF_ISA_A_NODIV: | |
645 | isa = "A"; | |
646 | additional = " [nodiv]"; | |
647 | break; | |
648 | case EF_M68K_CF_ISA_A: | |
649 | isa = "A"; | |
650 | break; | |
651 | case EF_M68K_CF_ISA_A_PLUS: | |
652 | isa = "A+"; | |
653 | break; | |
654 | case EF_M68K_CF_ISA_B_NOUSP: | |
655 | isa = "B"; | |
656 | additional = " [nousp]"; | |
657 | break; | |
658 | case EF_M68K_CF_ISA_B: | |
659 | isa = "B"; | |
660 | break; | |
9a2e615a NS |
661 | case EF_M68K_CF_ISA_C: |
662 | isa = "C"; | |
663 | break; | |
8d100c32 KH |
664 | case EF_M68K_CF_ISA_C_NODIV: |
665 | isa = "C"; | |
666 | additional = " [nodiv]"; | |
667 | break; | |
425c6cb0 KH |
668 | } |
669 | fprintf (file, " [isa %s]%s", isa, additional); | |
670 | if (eflags & EF_M68K_CF_FLOAT) | |
671 | fprintf (file, " [float]"); | |
672 | switch (eflags & EF_M68K_CF_MAC_MASK) | |
673 | { | |
674 | case 0: | |
675 | mac = NULL; | |
676 | break; | |
677 | case EF_M68K_CF_MAC: | |
678 | mac = "mac"; | |
679 | break; | |
680 | case EF_M68K_CF_EMAC: | |
681 | mac = "emac"; | |
682 | break; | |
683 | } | |
684 | if (mac) | |
685 | fprintf (file, " [%s]", mac); | |
266abb8f | 686 | } |
266abb8f NS |
687 | } |
688 | ||
9e1281c7 CM |
689 | fputc ('\n', file); |
690 | ||
b34976b6 | 691 | return TRUE; |
9e1281c7 | 692 | } |
252b5132 RH |
693 | /* Look through the relocs for a section during the first phase, and |
694 | allocate space in the global offset table or procedure linkage | |
695 | table. */ | |
696 | ||
b34976b6 | 697 | static bfd_boolean |
252b5132 RH |
698 | elf_m68k_check_relocs (abfd, info, sec, relocs) |
699 | bfd *abfd; | |
700 | struct bfd_link_info *info; | |
701 | asection *sec; | |
702 | const Elf_Internal_Rela *relocs; | |
703 | { | |
704 | bfd *dynobj; | |
705 | Elf_Internal_Shdr *symtab_hdr; | |
706 | struct elf_link_hash_entry **sym_hashes; | |
707 | bfd_signed_vma *local_got_refcounts; | |
708 | const Elf_Internal_Rela *rel; | |
709 | const Elf_Internal_Rela *rel_end; | |
710 | asection *sgot; | |
711 | asection *srelgot; | |
712 | asection *sreloc; | |
713 | ||
1049f94e | 714 | if (info->relocatable) |
b34976b6 | 715 | return TRUE; |
252b5132 RH |
716 | |
717 | dynobj = elf_hash_table (info)->dynobj; | |
718 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
719 | sym_hashes = elf_sym_hashes (abfd); | |
720 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
721 | ||
722 | sgot = NULL; | |
723 | srelgot = NULL; | |
724 | sreloc = NULL; | |
725 | ||
726 | rel_end = relocs + sec->reloc_count; | |
727 | for (rel = relocs; rel < rel_end; rel++) | |
728 | { | |
729 | unsigned long r_symndx; | |
730 | struct elf_link_hash_entry *h; | |
731 | ||
732 | r_symndx = ELF32_R_SYM (rel->r_info); | |
733 | ||
734 | if (r_symndx < symtab_hdr->sh_info) | |
735 | h = NULL; | |
736 | else | |
973a3492 L |
737 | { |
738 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
739 | while (h->root.type == bfd_link_hash_indirect | |
740 | || h->root.type == bfd_link_hash_warning) | |
741 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
742 | } | |
252b5132 RH |
743 | |
744 | switch (ELF32_R_TYPE (rel->r_info)) | |
745 | { | |
746 | case R_68K_GOT8: | |
747 | case R_68K_GOT16: | |
748 | case R_68K_GOT32: | |
749 | if (h != NULL | |
750 | && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) | |
751 | break; | |
752 | /* Fall through. */ | |
753 | case R_68K_GOT8O: | |
754 | case R_68K_GOT16O: | |
755 | case R_68K_GOT32O: | |
756 | /* This symbol requires a global offset table entry. */ | |
757 | ||
758 | if (dynobj == NULL) | |
759 | { | |
760 | /* Create the .got section. */ | |
761 | elf_hash_table (info)->dynobj = dynobj = abfd; | |
762 | if (!_bfd_elf_create_got_section (dynobj, info)) | |
b34976b6 | 763 | return FALSE; |
252b5132 RH |
764 | } |
765 | ||
766 | if (sgot == NULL) | |
767 | { | |
768 | sgot = bfd_get_section_by_name (dynobj, ".got"); | |
769 | BFD_ASSERT (sgot != NULL); | |
770 | } | |
771 | ||
772 | if (srelgot == NULL | |
773 | && (h != NULL || info->shared)) | |
774 | { | |
775 | srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); | |
776 | if (srelgot == NULL) | |
777 | { | |
3496cb2a L |
778 | srelgot = bfd_make_section_with_flags (dynobj, |
779 | ".rela.got", | |
780 | (SEC_ALLOC | |
781 | | SEC_LOAD | |
782 | | SEC_HAS_CONTENTS | |
783 | | SEC_IN_MEMORY | |
784 | | SEC_LINKER_CREATED | |
785 | | SEC_READONLY)); | |
252b5132 | 786 | if (srelgot == NULL |
252b5132 | 787 | || !bfd_set_section_alignment (dynobj, srelgot, 2)) |
b34976b6 | 788 | return FALSE; |
252b5132 RH |
789 | } |
790 | } | |
791 | ||
792 | if (h != NULL) | |
793 | { | |
51b64d56 | 794 | if (h->got.refcount == 0) |
252b5132 | 795 | { |
252b5132 | 796 | /* Make sure this symbol is output as a dynamic symbol. */ |
b6152c34 | 797 | if (h->dynindx == -1 |
f5385ebf | 798 | && !h->forced_local) |
252b5132 | 799 | { |
c152c796 | 800 | if (!bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 801 | return FALSE; |
252b5132 RH |
802 | } |
803 | ||
804 | /* Allocate space in the .got section. */ | |
eea6121a | 805 | sgot->size += 4; |
252b5132 | 806 | /* Allocate relocation space. */ |
eea6121a | 807 | srelgot->size += sizeof (Elf32_External_Rela); |
252b5132 | 808 | } |
51b64d56 | 809 | h->got.refcount++; |
252b5132 RH |
810 | } |
811 | else | |
812 | { | |
813 | /* This is a global offset table entry for a local symbol. */ | |
814 | if (local_got_refcounts == NULL) | |
815 | { | |
dc810e39 | 816 | bfd_size_type size; |
252b5132 | 817 | |
dc810e39 AM |
818 | size = symtab_hdr->sh_info; |
819 | size *= sizeof (bfd_signed_vma); | |
252b5132 | 820 | local_got_refcounts = ((bfd_signed_vma *) |
51b64d56 | 821 | bfd_zalloc (abfd, size)); |
252b5132 | 822 | if (local_got_refcounts == NULL) |
b34976b6 | 823 | return FALSE; |
252b5132 | 824 | elf_local_got_refcounts (abfd) = local_got_refcounts; |
252b5132 | 825 | } |
51b64d56 | 826 | if (local_got_refcounts[r_symndx] == 0) |
252b5132 | 827 | { |
eea6121a | 828 | sgot->size += 4; |
252b5132 RH |
829 | if (info->shared) |
830 | { | |
831 | /* If we are generating a shared object, we need to | |
832 | output a R_68K_RELATIVE reloc so that the dynamic | |
833 | linker can adjust this GOT entry. */ | |
eea6121a | 834 | srelgot->size += sizeof (Elf32_External_Rela); |
252b5132 RH |
835 | } |
836 | } | |
51b64d56 | 837 | local_got_refcounts[r_symndx]++; |
252b5132 RH |
838 | } |
839 | break; | |
840 | ||
841 | case R_68K_PLT8: | |
842 | case R_68K_PLT16: | |
843 | case R_68K_PLT32: | |
844 | /* This symbol requires a procedure linkage table entry. We | |
845 | actually build the entry in adjust_dynamic_symbol, | |
846 | because this might be a case of linking PIC code which is | |
847 | never referenced by a dynamic object, in which case we | |
848 | don't need to generate a procedure linkage table entry | |
849 | after all. */ | |
850 | ||
851 | /* If this is a local symbol, we resolve it directly without | |
852 | creating a procedure linkage table entry. */ | |
853 | if (h == NULL) | |
854 | continue; | |
855 | ||
f5385ebf | 856 | h->needs_plt = 1; |
51b64d56 | 857 | h->plt.refcount++; |
252b5132 RH |
858 | break; |
859 | ||
860 | case R_68K_PLT8O: | |
861 | case R_68K_PLT16O: | |
862 | case R_68K_PLT32O: | |
863 | /* This symbol requires a procedure linkage table entry. */ | |
864 | ||
865 | if (h == NULL) | |
866 | { | |
867 | /* It does not make sense to have this relocation for a | |
868 | local symbol. FIXME: does it? How to handle it if | |
869 | it does make sense? */ | |
870 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 871 | return FALSE; |
252b5132 RH |
872 | } |
873 | ||
874 | /* Make sure this symbol is output as a dynamic symbol. */ | |
b6152c34 | 875 | if (h->dynindx == -1 |
f5385ebf | 876 | && !h->forced_local) |
252b5132 | 877 | { |
c152c796 | 878 | if (!bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 879 | return FALSE; |
252b5132 RH |
880 | } |
881 | ||
f5385ebf | 882 | h->needs_plt = 1; |
51b64d56 | 883 | h->plt.refcount++; |
252b5132 RH |
884 | break; |
885 | ||
886 | case R_68K_PC8: | |
887 | case R_68K_PC16: | |
888 | case R_68K_PC32: | |
889 | /* If we are creating a shared library and this is not a local | |
890 | symbol, we need to copy the reloc into the shared library. | |
891 | However when linking with -Bsymbolic and this is a global | |
892 | symbol which is defined in an object we are including in the | |
893 | link (i.e., DEF_REGULAR is set), then we can resolve the | |
894 | reloc directly. At this point we have not seen all the input | |
895 | files, so it is possible that DEF_REGULAR is not set now but | |
896 | will be set later (it is never cleared). We account for that | |
897 | possibility below by storing information in the | |
898 | pcrel_relocs_copied field of the hash table entry. */ | |
899 | if (!(info->shared | |
900 | && (sec->flags & SEC_ALLOC) != 0 | |
901 | && h != NULL | |
902 | && (!info->symbolic | |
b6152c34 | 903 | || h->root.type == bfd_link_hash_defweak |
f5385ebf | 904 | || !h->def_regular))) |
252b5132 RH |
905 | { |
906 | if (h != NULL) | |
907 | { | |
908 | /* Make sure a plt entry is created for this symbol if | |
909 | it turns out to be a function defined by a dynamic | |
910 | object. */ | |
51b64d56 | 911 | h->plt.refcount++; |
252b5132 RH |
912 | } |
913 | break; | |
914 | } | |
915 | /* Fall through. */ | |
916 | case R_68K_8: | |
917 | case R_68K_16: | |
918 | case R_68K_32: | |
919 | if (h != NULL) | |
920 | { | |
921 | /* Make sure a plt entry is created for this symbol if it | |
922 | turns out to be a function defined by a dynamic object. */ | |
51b64d56 | 923 | h->plt.refcount++; |
252b5132 RH |
924 | } |
925 | ||
926 | /* If we are creating a shared library, we need to copy the | |
927 | reloc into the shared library. */ | |
928 | if (info->shared | |
929 | && (sec->flags & SEC_ALLOC) != 0) | |
930 | { | |
931 | /* When creating a shared object, we must copy these | |
932 | reloc types into the output file. We create a reloc | |
933 | section in dynobj and make room for this reloc. */ | |
934 | if (sreloc == NULL) | |
935 | { | |
936 | const char *name; | |
937 | ||
938 | name = (bfd_elf_string_from_elf_section | |
939 | (abfd, | |
940 | elf_elfheader (abfd)->e_shstrndx, | |
941 | elf_section_data (sec)->rel_hdr.sh_name)); | |
942 | if (name == NULL) | |
b34976b6 | 943 | return FALSE; |
252b5132 | 944 | |
0112cd26 | 945 | BFD_ASSERT (CONST_STRNEQ (name, ".rela") |
252b5132 RH |
946 | && strcmp (bfd_get_section_name (abfd, sec), |
947 | name + 5) == 0); | |
948 | ||
949 | sreloc = bfd_get_section_by_name (dynobj, name); | |
950 | if (sreloc == NULL) | |
951 | { | |
3496cb2a L |
952 | sreloc = bfd_make_section_with_flags (dynobj, |
953 | name, | |
954 | (SEC_ALLOC | |
955 | | SEC_LOAD | |
956 | | SEC_HAS_CONTENTS | |
957 | | SEC_IN_MEMORY | |
958 | | SEC_LINKER_CREATED | |
959 | | SEC_READONLY)); | |
252b5132 | 960 | if (sreloc == NULL |
252b5132 | 961 | || !bfd_set_section_alignment (dynobj, sreloc, 2)) |
b34976b6 | 962 | return FALSE; |
252b5132 | 963 | } |
d2ff124f | 964 | elf_section_data (sec)->sreloc = sreloc; |
252b5132 RH |
965 | } |
966 | ||
3e829b4a AS |
967 | if (sec->flags & SEC_READONLY |
968 | /* Don't set DF_TEXTREL yet for PC relative | |
969 | relocations, they might be discarded later. */ | |
970 | && !(ELF32_R_TYPE (rel->r_info) == R_68K_PC8 | |
971 | || ELF32_R_TYPE (rel->r_info) == R_68K_PC16 | |
972 | || ELF32_R_TYPE (rel->r_info) == R_68K_PC32)) | |
973 | info->flags |= DF_TEXTREL; | |
974 | ||
eea6121a | 975 | sreloc->size += sizeof (Elf32_External_Rela); |
252b5132 | 976 | |
b6152c34 AS |
977 | /* We count the number of PC relative relocations we have |
978 | entered for this symbol, so that we can discard them | |
979 | again if, in the -Bsymbolic case, the symbol is later | |
980 | defined by a regular object, or, in the normal shared | |
981 | case, the symbol is forced to be local. Note that this | |
982 | function is only called if we are using an m68kelf linker | |
983 | hash table, which means that h is really a pointer to an | |
252b5132 | 984 | elf_m68k_link_hash_entry. */ |
b6152c34 AS |
985 | if (ELF32_R_TYPE (rel->r_info) == R_68K_PC8 |
986 | || ELF32_R_TYPE (rel->r_info) == R_68K_PC16 | |
987 | || ELF32_R_TYPE (rel->r_info) == R_68K_PC32) | |
252b5132 | 988 | { |
252b5132 | 989 | struct elf_m68k_pcrel_relocs_copied *p; |
b6152c34 AS |
990 | struct elf_m68k_pcrel_relocs_copied **head; |
991 | ||
992 | if (h != NULL) | |
993 | { | |
994 | struct elf_m68k_link_hash_entry *eh | |
0cca5f05 | 995 | = elf_m68k_hash_entry (h); |
b6152c34 AS |
996 | head = &eh->pcrel_relocs_copied; |
997 | } | |
998 | else | |
999 | { | |
1000 | asection *s; | |
6edfbbad DJ |
1001 | void *vpp; |
1002 | ||
b6152c34 AS |
1003 | s = (bfd_section_from_r_symndx |
1004 | (abfd, &elf_m68k_hash_table (info)->sym_sec, | |
1005 | sec, r_symndx)); | |
1006 | if (s == NULL) | |
1007 | return FALSE; | |
252b5132 | 1008 | |
6edfbbad DJ |
1009 | vpp = &elf_section_data (s)->local_dynrel; |
1010 | head = (struct elf_m68k_pcrel_relocs_copied **) vpp; | |
b6152c34 | 1011 | } |
252b5132 | 1012 | |
b6152c34 | 1013 | for (p = *head; p != NULL; p = p->next) |
252b5132 RH |
1014 | if (p->section == sreloc) |
1015 | break; | |
1016 | ||
1017 | if (p == NULL) | |
1018 | { | |
1019 | p = ((struct elf_m68k_pcrel_relocs_copied *) | |
dc810e39 | 1020 | bfd_alloc (dynobj, (bfd_size_type) sizeof *p)); |
252b5132 | 1021 | if (p == NULL) |
b34976b6 | 1022 | return FALSE; |
b6152c34 AS |
1023 | p->next = *head; |
1024 | *head = p; | |
252b5132 RH |
1025 | p->section = sreloc; |
1026 | p->count = 0; | |
1027 | } | |
1028 | ||
1029 | ++p->count; | |
1030 | } | |
1031 | } | |
1032 | ||
1033 | break; | |
1034 | ||
1035 | /* This relocation describes the C++ object vtable hierarchy. | |
1036 | Reconstruct it for later use during GC. */ | |
1037 | case R_68K_GNU_VTINHERIT: | |
c152c796 | 1038 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
b34976b6 | 1039 | return FALSE; |
252b5132 RH |
1040 | break; |
1041 | ||
1042 | /* This relocation describes which C++ vtable entries are actually | |
1043 | used. Record for later use during GC. */ | |
1044 | case R_68K_GNU_VTENTRY: | |
c152c796 | 1045 | if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) |
b34976b6 | 1046 | return FALSE; |
252b5132 RH |
1047 | break; |
1048 | ||
1049 | default: | |
1050 | break; | |
1051 | } | |
1052 | } | |
1053 | ||
b34976b6 | 1054 | return TRUE; |
252b5132 RH |
1055 | } |
1056 | ||
1057 | /* Return the section that should be marked against GC for a given | |
1058 | relocation. */ | |
1059 | ||
1060 | static asection * | |
07adf181 AM |
1061 | elf_m68k_gc_mark_hook (asection *sec, |
1062 | struct bfd_link_info *info, | |
1063 | Elf_Internal_Rela *rel, | |
1064 | struct elf_link_hash_entry *h, | |
1065 | Elf_Internal_Sym *sym) | |
252b5132 RH |
1066 | { |
1067 | if (h != NULL) | |
07adf181 AM |
1068 | switch (ELF32_R_TYPE (rel->r_info)) |
1069 | { | |
1070 | case R_68K_GNU_VTINHERIT: | |
1071 | case R_68K_GNU_VTENTRY: | |
1072 | return NULL; | |
1073 | } | |
1074 | ||
1075 | return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); | |
252b5132 RH |
1076 | } |
1077 | ||
1078 | /* Update the got entry reference counts for the section being removed. */ | |
1079 | ||
b34976b6 | 1080 | static bfd_boolean |
07adf181 AM |
1081 | elf_m68k_gc_sweep_hook (bfd *abfd, |
1082 | struct bfd_link_info *info, | |
1083 | asection *sec, | |
1084 | const Elf_Internal_Rela *relocs) | |
252b5132 RH |
1085 | { |
1086 | Elf_Internal_Shdr *symtab_hdr; | |
1087 | struct elf_link_hash_entry **sym_hashes; | |
1088 | bfd_signed_vma *local_got_refcounts; | |
1089 | const Elf_Internal_Rela *rel, *relend; | |
252b5132 | 1090 | bfd *dynobj; |
dd5724d5 AM |
1091 | asection *sgot; |
1092 | asection *srelgot; | |
252b5132 | 1093 | |
252b5132 | 1094 | dynobj = elf_hash_table (info)->dynobj; |
dd5724d5 | 1095 | if (dynobj == NULL) |
b34976b6 | 1096 | return TRUE; |
dd5724d5 | 1097 | |
4f075348 KH |
1098 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
1099 | sym_hashes = elf_sym_hashes (abfd); | |
1100 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
1101 | ||
dd5724d5 AM |
1102 | sgot = bfd_get_section_by_name (dynobj, ".got"); |
1103 | srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); | |
252b5132 RH |
1104 | |
1105 | relend = relocs + sec->reloc_count; | |
1106 | for (rel = relocs; rel < relend; rel++) | |
1107 | { | |
4f075348 | 1108 | unsigned long r_symndx; |
3eb128b2 AM |
1109 | struct elf_link_hash_entry *h = NULL; |
1110 | ||
1111 | r_symndx = ELF32_R_SYM (rel->r_info); | |
1112 | if (r_symndx >= symtab_hdr->sh_info) | |
1113 | { | |
1114 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
1115 | while (h->root.type == bfd_link_hash_indirect | |
1116 | || h->root.type == bfd_link_hash_warning) | |
1117 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1118 | } | |
4f075348 | 1119 | |
252b5132 RH |
1120 | switch (ELF32_R_TYPE (rel->r_info)) |
1121 | { | |
1122 | case R_68K_GOT8: | |
1123 | case R_68K_GOT16: | |
1124 | case R_68K_GOT32: | |
1125 | case R_68K_GOT8O: | |
1126 | case R_68K_GOT16O: | |
1127 | case R_68K_GOT32O: | |
3eb128b2 | 1128 | if (h != NULL) |
252b5132 | 1129 | { |
252b5132 RH |
1130 | if (h->got.refcount > 0) |
1131 | { | |
1132 | --h->got.refcount; | |
1133 | if (h->got.refcount == 0) | |
1134 | { | |
1135 | /* We don't need the .got entry any more. */ | |
eea6121a AM |
1136 | sgot->size -= 4; |
1137 | srelgot->size -= sizeof (Elf32_External_Rela); | |
252b5132 RH |
1138 | } |
1139 | } | |
1140 | } | |
dd5724d5 | 1141 | else if (local_got_refcounts != NULL) |
252b5132 RH |
1142 | { |
1143 | if (local_got_refcounts[r_symndx] > 0) | |
1144 | { | |
1145 | --local_got_refcounts[r_symndx]; | |
1146 | if (local_got_refcounts[r_symndx] == 0) | |
1147 | { | |
1148 | /* We don't need the .got entry any more. */ | |
eea6121a | 1149 | sgot->size -= 4; |
252b5132 | 1150 | if (info->shared) |
eea6121a | 1151 | srelgot->size -= sizeof (Elf32_External_Rela); |
252b5132 RH |
1152 | } |
1153 | } | |
1154 | } | |
1155 | break; | |
1156 | ||
1157 | case R_68K_PLT8: | |
1158 | case R_68K_PLT16: | |
1159 | case R_68K_PLT32: | |
1160 | case R_68K_PLT8O: | |
1161 | case R_68K_PLT16O: | |
1162 | case R_68K_PLT32O: | |
1163 | case R_68K_PC8: | |
1164 | case R_68K_PC16: | |
1165 | case R_68K_PC32: | |
1166 | case R_68K_8: | |
1167 | case R_68K_16: | |
1168 | case R_68K_32: | |
3eb128b2 | 1169 | if (h != NULL) |
252b5132 | 1170 | { |
252b5132 RH |
1171 | if (h->plt.refcount > 0) |
1172 | --h->plt.refcount; | |
1173 | } | |
1174 | break; | |
1175 | ||
1176 | default: | |
1177 | break; | |
1178 | } | |
1179 | } | |
1180 | ||
b34976b6 | 1181 | return TRUE; |
252b5132 | 1182 | } |
cc3e26be RS |
1183 | \f |
1184 | /* Return the type of PLT associated with OUTPUT_BFD. */ | |
1185 | ||
1186 | static const struct elf_m68k_plt_info * | |
1187 | elf_m68k_get_plt_info (bfd *output_bfd) | |
1188 | { | |
1189 | unsigned int features; | |
1190 | ||
1191 | features = bfd_m68k_mach_to_features (bfd_get_mach (output_bfd)); | |
1192 | if (features & cpu32) | |
1193 | return &elf_cpu32_plt_info; | |
1194 | if (features & mcfisa_b) | |
1195 | return &elf_isab_plt_info; | |
9a2e615a NS |
1196 | if (features & mcfisa_c) |
1197 | return &elf_isac_plt_info; | |
cc3e26be RS |
1198 | return &elf_m68k_plt_info; |
1199 | } | |
1200 | ||
1201 | /* This function is called after all the input files have been read, | |
1202 | and the input sections have been assigned to output sections. | |
1203 | It's a convenient place to determine the PLT style. */ | |
1204 | ||
1205 | static bfd_boolean | |
1206 | elf_m68k_always_size_sections (bfd *output_bfd, struct bfd_link_info *info) | |
1207 | { | |
1208 | elf_m68k_hash_table (info)->plt_info = elf_m68k_get_plt_info (output_bfd); | |
1209 | return TRUE; | |
1210 | } | |
252b5132 | 1211 | |
252b5132 RH |
1212 | /* Adjust a symbol defined by a dynamic object and referenced by a |
1213 | regular object. The current definition is in some section of the | |
1214 | dynamic object, but we're not including those sections. We have to | |
1215 | change the definition to something the rest of the link can | |
1216 | understand. */ | |
1217 | ||
b34976b6 | 1218 | static bfd_boolean |
252b5132 RH |
1219 | elf_m68k_adjust_dynamic_symbol (info, h) |
1220 | struct bfd_link_info *info; | |
1221 | struct elf_link_hash_entry *h; | |
1222 | { | |
cc3e26be | 1223 | struct elf_m68k_link_hash_table *htab; |
252b5132 RH |
1224 | bfd *dynobj; |
1225 | asection *s; | |
252b5132 | 1226 | |
cc3e26be | 1227 | htab = elf_m68k_hash_table (info); |
252b5132 RH |
1228 | dynobj = elf_hash_table (info)->dynobj; |
1229 | ||
1230 | /* Make sure we know what is going on here. */ | |
1231 | BFD_ASSERT (dynobj != NULL | |
f5385ebf | 1232 | && (h->needs_plt |
f6e332e6 | 1233 | || h->u.weakdef != NULL |
f5385ebf AM |
1234 | || (h->def_dynamic |
1235 | && h->ref_regular | |
1236 | && !h->def_regular))); | |
252b5132 RH |
1237 | |
1238 | /* If this is a function, put it in the procedure linkage table. We | |
1239 | will fill in the contents of the procedure linkage table later, | |
1240 | when we know the address of the .got section. */ | |
1241 | if (h->type == STT_FUNC | |
f5385ebf | 1242 | || h->needs_plt) |
252b5132 | 1243 | { |
9dfe8738 AS |
1244 | if ((h->plt.refcount <= 0 |
1245 | || SYMBOL_CALLS_LOCAL (info, h) | |
1246 | || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
1247 | && h->root.type == bfd_link_hash_undefweak)) | |
252b5132 RH |
1248 | /* We must always create the plt entry if it was referenced |
1249 | by a PLTxxO relocation. In this case we already recorded | |
1250 | it as a dynamic symbol. */ | |
1251 | && h->dynindx == -1) | |
1252 | { | |
1253 | /* This case can occur if we saw a PLTxx reloc in an input | |
1254 | file, but the symbol was never referred to by a dynamic | |
9dfe8738 AS |
1255 | object, or if all references were garbage collected. In |
1256 | such a case, we don't actually need to build a procedure | |
1257 | linkage table, and we can just do a PCxx reloc instead. */ | |
252b5132 | 1258 | h->plt.offset = (bfd_vma) -1; |
f5385ebf | 1259 | h->needs_plt = 0; |
b34976b6 | 1260 | return TRUE; |
252b5132 RH |
1261 | } |
1262 | ||
1263 | /* Make sure this symbol is output as a dynamic symbol. */ | |
b6152c34 | 1264 | if (h->dynindx == -1 |
f5385ebf | 1265 | && !h->forced_local) |
252b5132 | 1266 | { |
c152c796 | 1267 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 1268 | return FALSE; |
252b5132 RH |
1269 | } |
1270 | ||
1271 | s = bfd_get_section_by_name (dynobj, ".plt"); | |
1272 | BFD_ASSERT (s != NULL); | |
1273 | ||
1274 | /* If this is the first .plt entry, make room for the special | |
1275 | first entry. */ | |
eea6121a | 1276 | if (s->size == 0) |
cc3e26be | 1277 | s->size = htab->plt_info->size; |
252b5132 RH |
1278 | |
1279 | /* If this symbol is not defined in a regular file, and we are | |
1280 | not generating a shared library, then set the symbol to this | |
1281 | location in the .plt. This is required to make function | |
1282 | pointers compare as equal between the normal executable and | |
1283 | the shared library. */ | |
1284 | if (!info->shared | |
f5385ebf | 1285 | && !h->def_regular) |
252b5132 RH |
1286 | { |
1287 | h->root.u.def.section = s; | |
eea6121a | 1288 | h->root.u.def.value = s->size; |
252b5132 RH |
1289 | } |
1290 | ||
eea6121a | 1291 | h->plt.offset = s->size; |
252b5132 RH |
1292 | |
1293 | /* Make room for this entry. */ | |
cc3e26be | 1294 | s->size += htab->plt_info->size; |
252b5132 RH |
1295 | |
1296 | /* We also need to make an entry in the .got.plt section, which | |
1297 | will be placed in the .got section by the linker script. */ | |
252b5132 RH |
1298 | s = bfd_get_section_by_name (dynobj, ".got.plt"); |
1299 | BFD_ASSERT (s != NULL); | |
eea6121a | 1300 | s->size += 4; |
252b5132 RH |
1301 | |
1302 | /* We also need to make an entry in the .rela.plt section. */ | |
252b5132 RH |
1303 | s = bfd_get_section_by_name (dynobj, ".rela.plt"); |
1304 | BFD_ASSERT (s != NULL); | |
eea6121a | 1305 | s->size += sizeof (Elf32_External_Rela); |
252b5132 | 1306 | |
b34976b6 | 1307 | return TRUE; |
252b5132 RH |
1308 | } |
1309 | ||
1310 | /* Reinitialize the plt offset now that it is not used as a reference | |
1311 | count any more. */ | |
1312 | h->plt.offset = (bfd_vma) -1; | |
1313 | ||
1314 | /* If this is a weak symbol, and there is a real definition, the | |
1315 | processor independent code will have arranged for us to see the | |
1316 | real definition first, and we can just use the same value. */ | |
f6e332e6 | 1317 | if (h->u.weakdef != NULL) |
252b5132 | 1318 | { |
f6e332e6 AM |
1319 | BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined |
1320 | || h->u.weakdef->root.type == bfd_link_hash_defweak); | |
1321 | h->root.u.def.section = h->u.weakdef->root.u.def.section; | |
1322 | h->root.u.def.value = h->u.weakdef->root.u.def.value; | |
b34976b6 | 1323 | return TRUE; |
252b5132 RH |
1324 | } |
1325 | ||
1326 | /* This is a reference to a symbol defined by a dynamic object which | |
1327 | is not a function. */ | |
1328 | ||
1329 | /* If we are creating a shared library, we must presume that the | |
1330 | only references to the symbol are via the global offset table. | |
1331 | For such cases we need not do anything here; the relocations will | |
1332 | be handled correctly by relocate_section. */ | |
1333 | if (info->shared) | |
b34976b6 | 1334 | return TRUE; |
252b5132 | 1335 | |
909272ee AM |
1336 | if (h->size == 0) |
1337 | { | |
1338 | (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"), | |
1339 | h->root.root.string); | |
1340 | return TRUE; | |
1341 | } | |
1342 | ||
252b5132 RH |
1343 | /* We must allocate the symbol in our .dynbss section, which will |
1344 | become part of the .bss section of the executable. There will be | |
1345 | an entry for this symbol in the .dynsym section. The dynamic | |
1346 | object will contain position independent code, so all references | |
1347 | from the dynamic object to this symbol will go through the global | |
1348 | offset table. The dynamic linker will use the .dynsym entry to | |
1349 | determine the address it must put in the global offset table, so | |
1350 | both the dynamic object and the regular object will refer to the | |
1351 | same memory location for the variable. */ | |
1352 | ||
1353 | s = bfd_get_section_by_name (dynobj, ".dynbss"); | |
1354 | BFD_ASSERT (s != NULL); | |
1355 | ||
1356 | /* We must generate a R_68K_COPY reloc to tell the dynamic linker to | |
1357 | copy the initial value out of the dynamic object and into the | |
1358 | runtime process image. We need to remember the offset into the | |
1359 | .rela.bss section we are going to use. */ | |
1360 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) | |
1361 | { | |
1362 | asection *srel; | |
1363 | ||
1364 | srel = bfd_get_section_by_name (dynobj, ".rela.bss"); | |
1365 | BFD_ASSERT (srel != NULL); | |
eea6121a | 1366 | srel->size += sizeof (Elf32_External_Rela); |
f5385ebf | 1367 | h->needs_copy = 1; |
252b5132 RH |
1368 | } |
1369 | ||
027297b7 | 1370 | return _bfd_elf_adjust_dynamic_copy (h, s); |
252b5132 RH |
1371 | } |
1372 | ||
1373 | /* Set the sizes of the dynamic sections. */ | |
1374 | ||
b34976b6 | 1375 | static bfd_boolean |
252b5132 | 1376 | elf_m68k_size_dynamic_sections (output_bfd, info) |
aa91b392 | 1377 | bfd *output_bfd ATTRIBUTE_UNUSED; |
252b5132 RH |
1378 | struct bfd_link_info *info; |
1379 | { | |
1380 | bfd *dynobj; | |
1381 | asection *s; | |
b34976b6 AM |
1382 | bfd_boolean plt; |
1383 | bfd_boolean relocs; | |
252b5132 RH |
1384 | |
1385 | dynobj = elf_hash_table (info)->dynobj; | |
1386 | BFD_ASSERT (dynobj != NULL); | |
1387 | ||
1388 | if (elf_hash_table (info)->dynamic_sections_created) | |
1389 | { | |
1390 | /* Set the contents of the .interp section to the interpreter. */ | |
893c4fe2 | 1391 | if (info->executable) |
252b5132 RH |
1392 | { |
1393 | s = bfd_get_section_by_name (dynobj, ".interp"); | |
1394 | BFD_ASSERT (s != NULL); | |
eea6121a | 1395 | s->size = sizeof ELF_DYNAMIC_INTERPRETER; |
252b5132 RH |
1396 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
1397 | } | |
1398 | } | |
1399 | else | |
1400 | { | |
1401 | /* We may have created entries in the .rela.got section. | |
1402 | However, if we are not creating the dynamic sections, we will | |
1403 | not actually use these entries. Reset the size of .rela.got, | |
1404 | which will cause it to get stripped from the output file | |
1405 | below. */ | |
1406 | s = bfd_get_section_by_name (dynobj, ".rela.got"); | |
1407 | if (s != NULL) | |
eea6121a | 1408 | s->size = 0; |
252b5132 RH |
1409 | } |
1410 | ||
b6152c34 AS |
1411 | /* If this is a -Bsymbolic shared link, then we need to discard all |
1412 | PC relative relocs against symbols defined in a regular object. | |
1413 | For the normal shared case we discard the PC relative relocs | |
1414 | against symbols that have become local due to visibility changes. | |
1415 | We allocated space for them in the check_relocs routine, but we | |
1416 | will not fill them in in the relocate_section routine. */ | |
1417 | if (info->shared) | |
0cca5f05 AS |
1418 | elf_link_hash_traverse (elf_hash_table (info), |
1419 | elf_m68k_discard_copies, | |
1420 | (PTR) info); | |
252b5132 RH |
1421 | |
1422 | /* The check_relocs and adjust_dynamic_symbol entry points have | |
1423 | determined the sizes of the various dynamic sections. Allocate | |
1424 | memory for them. */ | |
b34976b6 AM |
1425 | plt = FALSE; |
1426 | relocs = FALSE; | |
252b5132 RH |
1427 | for (s = dynobj->sections; s != NULL; s = s->next) |
1428 | { | |
1429 | const char *name; | |
252b5132 RH |
1430 | |
1431 | if ((s->flags & SEC_LINKER_CREATED) == 0) | |
1432 | continue; | |
1433 | ||
1434 | /* It's OK to base decisions on the section name, because none | |
1435 | of the dynobj section names depend upon the input files. */ | |
1436 | name = bfd_get_section_name (dynobj, s); | |
1437 | ||
252b5132 RH |
1438 | if (strcmp (name, ".plt") == 0) |
1439 | { | |
c456f082 AM |
1440 | /* Remember whether there is a PLT. */ |
1441 | plt = s->size != 0; | |
252b5132 | 1442 | } |
0112cd26 | 1443 | else if (CONST_STRNEQ (name, ".rela")) |
252b5132 | 1444 | { |
c456f082 | 1445 | if (s->size != 0) |
252b5132 | 1446 | { |
b34976b6 | 1447 | relocs = TRUE; |
252b5132 RH |
1448 | |
1449 | /* We use the reloc_count field as a counter if we need | |
1450 | to copy relocs into the output file. */ | |
1451 | s->reloc_count = 0; | |
1452 | } | |
1453 | } | |
0112cd26 | 1454 | else if (! CONST_STRNEQ (name, ".got") |
c456f082 | 1455 | && strcmp (name, ".dynbss") != 0) |
252b5132 RH |
1456 | { |
1457 | /* It's not one of our sections, so don't allocate space. */ | |
1458 | continue; | |
1459 | } | |
1460 | ||
c456f082 | 1461 | if (s->size == 0) |
252b5132 | 1462 | { |
c456f082 AM |
1463 | /* If we don't need this section, strip it from the |
1464 | output file. This is mostly to handle .rela.bss and | |
1465 | .rela.plt. We must create both sections in | |
1466 | create_dynamic_sections, because they must be created | |
1467 | before the linker maps input sections to output | |
1468 | sections. The linker does that before | |
1469 | adjust_dynamic_symbol is called, and it is that | |
1470 | function which decides whether anything needs to go | |
1471 | into these sections. */ | |
8423293d | 1472 | s->flags |= SEC_EXCLUDE; |
252b5132 RH |
1473 | continue; |
1474 | } | |
1475 | ||
c456f082 AM |
1476 | if ((s->flags & SEC_HAS_CONTENTS) == 0) |
1477 | continue; | |
1478 | ||
252b5132 | 1479 | /* Allocate memory for the section contents. */ |
7a9af8c4 NC |
1480 | /* FIXME: This should be a call to bfd_alloc not bfd_zalloc. |
1481 | Unused entries should be reclaimed before the section's contents | |
1482 | are written out, but at the moment this does not happen. Thus in | |
1483 | order to prevent writing out garbage, we initialise the section's | |
1484 | contents to zero. */ | |
eea6121a | 1485 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); |
c456f082 | 1486 | if (s->contents == NULL) |
b34976b6 | 1487 | return FALSE; |
252b5132 RH |
1488 | } |
1489 | ||
1490 | if (elf_hash_table (info)->dynamic_sections_created) | |
1491 | { | |
1492 | /* Add some entries to the .dynamic section. We fill in the | |
1493 | values later, in elf_m68k_finish_dynamic_sections, but we | |
1494 | must add the entries now so that we get the correct size for | |
1495 | the .dynamic section. The DT_DEBUG entry is filled in by the | |
1496 | dynamic linker and used by the debugger. */ | |
dc810e39 | 1497 | #define add_dynamic_entry(TAG, VAL) \ |
5a580b3a | 1498 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) |
dc810e39 | 1499 | |
252b5132 RH |
1500 | if (!info->shared) |
1501 | { | |
dc810e39 | 1502 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
b34976b6 | 1503 | return FALSE; |
252b5132 RH |
1504 | } |
1505 | ||
1506 | if (plt) | |
1507 | { | |
dc810e39 AM |
1508 | if (!add_dynamic_entry (DT_PLTGOT, 0) |
1509 | || !add_dynamic_entry (DT_PLTRELSZ, 0) | |
1510 | || !add_dynamic_entry (DT_PLTREL, DT_RELA) | |
1511 | || !add_dynamic_entry (DT_JMPREL, 0)) | |
b34976b6 | 1512 | return FALSE; |
252b5132 RH |
1513 | } |
1514 | ||
1515 | if (relocs) | |
1516 | { | |
dc810e39 AM |
1517 | if (!add_dynamic_entry (DT_RELA, 0) |
1518 | || !add_dynamic_entry (DT_RELASZ, 0) | |
1519 | || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela))) | |
b34976b6 | 1520 | return FALSE; |
252b5132 RH |
1521 | } |
1522 | ||
aa91b392 | 1523 | if ((info->flags & DF_TEXTREL) != 0) |
252b5132 | 1524 | { |
dc810e39 | 1525 | if (!add_dynamic_entry (DT_TEXTREL, 0)) |
b34976b6 | 1526 | return FALSE; |
252b5132 RH |
1527 | } |
1528 | } | |
dc810e39 | 1529 | #undef add_dynamic_entry |
252b5132 | 1530 | |
b34976b6 | 1531 | return TRUE; |
252b5132 RH |
1532 | } |
1533 | ||
0cca5f05 | 1534 | /* This function is called via elf_link_hash_traverse if we are |
b6152c34 AS |
1535 | creating a shared object. In the -Bsymbolic case it discards the |
1536 | space allocated to copy PC relative relocs against symbols which | |
3e829b4a | 1537 | are defined in regular objects. For the normal shared case, it |
b6152c34 AS |
1538 | discards space for pc-relative relocs that have become local due to |
1539 | symbol visibility changes. We allocated space for them in the | |
1540 | check_relocs routine, but we won't fill them in in the | |
3e829b4a AS |
1541 | relocate_section routine. |
1542 | ||
1543 | We also check whether any of the remaining relocations apply | |
1544 | against a readonly section, and set the DF_TEXTREL flag in this | |
1545 | case. */ | |
252b5132 | 1546 | |
b34976b6 | 1547 | static bfd_boolean |
b6152c34 | 1548 | elf_m68k_discard_copies (h, inf) |
0cca5f05 | 1549 | struct elf_link_hash_entry *h; |
b6152c34 | 1550 | PTR inf; |
252b5132 | 1551 | { |
b6152c34 | 1552 | struct bfd_link_info *info = (struct bfd_link_info *) inf; |
252b5132 RH |
1553 | struct elf_m68k_pcrel_relocs_copied *s; |
1554 | ||
0cca5f05 AS |
1555 | if (h->root.type == bfd_link_hash_warning) |
1556 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
e92d460e | 1557 | |
f5385ebf | 1558 | if (!h->def_regular |
b6152c34 | 1559 | || (!info->symbolic |
f5385ebf | 1560 | && !h->forced_local)) |
3e829b4a AS |
1561 | { |
1562 | if ((info->flags & DF_TEXTREL) == 0) | |
1563 | { | |
1564 | /* Look for relocations against read-only sections. */ | |
0cca5f05 AS |
1565 | for (s = elf_m68k_hash_entry (h)->pcrel_relocs_copied; |
1566 | s != NULL; | |
1567 | s = s->next) | |
3e829b4a AS |
1568 | if ((s->section->flags & SEC_READONLY) != 0) |
1569 | { | |
1570 | info->flags |= DF_TEXTREL; | |
1571 | break; | |
1572 | } | |
1573 | } | |
0cca5f05 | 1574 | |
3e829b4a AS |
1575 | return TRUE; |
1576 | } | |
252b5132 | 1577 | |
0cca5f05 AS |
1578 | for (s = elf_m68k_hash_entry (h)->pcrel_relocs_copied; |
1579 | s != NULL; | |
1580 | s = s->next) | |
eea6121a | 1581 | s->section->size -= s->count * sizeof (Elf32_External_Rela); |
252b5132 | 1582 | |
b34976b6 | 1583 | return TRUE; |
252b5132 RH |
1584 | } |
1585 | ||
1586 | /* Relocate an M68K ELF section. */ | |
1587 | ||
b34976b6 | 1588 | static bfd_boolean |
252b5132 RH |
1589 | elf_m68k_relocate_section (output_bfd, info, input_bfd, input_section, |
1590 | contents, relocs, local_syms, local_sections) | |
1591 | bfd *output_bfd; | |
1592 | struct bfd_link_info *info; | |
1593 | bfd *input_bfd; | |
1594 | asection *input_section; | |
1595 | bfd_byte *contents; | |
1596 | Elf_Internal_Rela *relocs; | |
1597 | Elf_Internal_Sym *local_syms; | |
1598 | asection **local_sections; | |
1599 | { | |
1600 | bfd *dynobj; | |
1601 | Elf_Internal_Shdr *symtab_hdr; | |
1602 | struct elf_link_hash_entry **sym_hashes; | |
1603 | bfd_vma *local_got_offsets; | |
1604 | asection *sgot; | |
1605 | asection *splt; | |
1606 | asection *sreloc; | |
1607 | Elf_Internal_Rela *rel; | |
1608 | Elf_Internal_Rela *relend; | |
1609 | ||
1610 | dynobj = elf_hash_table (info)->dynobj; | |
1611 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
1612 | sym_hashes = elf_sym_hashes (input_bfd); | |
1613 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
1614 | ||
1615 | sgot = NULL; | |
1616 | splt = NULL; | |
1617 | sreloc = NULL; | |
1618 | ||
1619 | rel = relocs; | |
1620 | relend = relocs + input_section->reloc_count; | |
1621 | for (; rel < relend; rel++) | |
1622 | { | |
1623 | int r_type; | |
1624 | reloc_howto_type *howto; | |
1625 | unsigned long r_symndx; | |
1626 | struct elf_link_hash_entry *h; | |
1627 | Elf_Internal_Sym *sym; | |
1628 | asection *sec; | |
1629 | bfd_vma relocation; | |
44f745a6 | 1630 | bfd_boolean unresolved_reloc; |
252b5132 RH |
1631 | bfd_reloc_status_type r; |
1632 | ||
1633 | r_type = ELF32_R_TYPE (rel->r_info); | |
1634 | if (r_type < 0 || r_type >= (int) R_68K_max) | |
1635 | { | |
1636 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 1637 | return FALSE; |
252b5132 RH |
1638 | } |
1639 | howto = howto_table + r_type; | |
1640 | ||
1641 | r_symndx = ELF32_R_SYM (rel->r_info); | |
1642 | ||
252b5132 RH |
1643 | h = NULL; |
1644 | sym = NULL; | |
1645 | sec = NULL; | |
44f745a6 | 1646 | unresolved_reloc = FALSE; |
560e09e9 | 1647 | |
252b5132 RH |
1648 | if (r_symndx < symtab_hdr->sh_info) |
1649 | { | |
1650 | sym = local_syms + r_symndx; | |
1651 | sec = local_sections[r_symndx]; | |
8517fae7 | 1652 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); |
252b5132 RH |
1653 | } |
1654 | else | |
1655 | { | |
560e09e9 NC |
1656 | bfd_boolean warned; |
1657 | ||
b2a8e766 AM |
1658 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
1659 | r_symndx, symtab_hdr, sym_hashes, | |
1660 | h, sec, relocation, | |
1661 | unresolved_reloc, warned); | |
252b5132 RH |
1662 | } |
1663 | ||
ab96bf03 AM |
1664 | if (sec != NULL && elf_discarded_section (sec)) |
1665 | { | |
1666 | /* For relocs against symbols from removed linkonce sections, | |
1667 | or sections discarded by a linker script, we just want the | |
1668 | section contents zeroed. Avoid any special processing. */ | |
1669 | _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset); | |
1670 | rel->r_info = 0; | |
1671 | rel->r_addend = 0; | |
1672 | continue; | |
1673 | } | |
1674 | ||
1675 | if (info->relocatable) | |
1676 | continue; | |
1677 | ||
252b5132 RH |
1678 | switch (r_type) |
1679 | { | |
1680 | case R_68K_GOT8: | |
1681 | case R_68K_GOT16: | |
1682 | case R_68K_GOT32: | |
1683 | /* Relocation is to the address of the entry for this symbol | |
1684 | in the global offset table. */ | |
1685 | if (h != NULL | |
1686 | && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) | |
1687 | break; | |
1688 | /* Fall through. */ | |
1689 | case R_68K_GOT8O: | |
1690 | case R_68K_GOT16O: | |
1691 | case R_68K_GOT32O: | |
1692 | /* Relocation is the offset of the entry for this symbol in | |
1693 | the global offset table. */ | |
1694 | ||
1695 | { | |
1696 | bfd_vma off; | |
1697 | ||
1698 | if (sgot == NULL) | |
1699 | { | |
1700 | sgot = bfd_get_section_by_name (dynobj, ".got"); | |
1701 | BFD_ASSERT (sgot != NULL); | |
1702 | } | |
1703 | ||
1704 | if (h != NULL) | |
1705 | { | |
a5ad465a AS |
1706 | bfd_boolean dyn; |
1707 | ||
252b5132 RH |
1708 | off = h->got.offset; |
1709 | BFD_ASSERT (off != (bfd_vma) -1); | |
1710 | ||
a5ad465a AS |
1711 | dyn = elf_hash_table (info)->dynamic_sections_created; |
1712 | if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) | |
252b5132 | 1713 | || (info->shared |
a5ad465a AS |
1714 | && (info->symbolic |
1715 | || h->dynindx == -1 | |
f5385ebf AM |
1716 | || h->forced_local) |
1717 | && h->def_regular)) | |
252b5132 RH |
1718 | { |
1719 | /* This is actually a static link, or it is a | |
1720 | -Bsymbolic link and the symbol is defined | |
1721 | locally, or the symbol was forced to be local | |
1722 | because of a version file.. We must initialize | |
1723 | this entry in the global offset table. Since | |
1724 | the offset must always be a multiple of 4, we | |
1725 | use the least significant bit to record whether | |
1726 | we have initialized it already. | |
1727 | ||
1728 | When doing a dynamic link, we create a .rela.got | |
1729 | relocation entry to initialize the value. This | |
1730 | is done in the finish_dynamic_symbol routine. */ | |
1731 | if ((off & 1) != 0) | |
1732 | off &= ~1; | |
1733 | else | |
1734 | { | |
1735 | bfd_put_32 (output_bfd, relocation, | |
1736 | sgot->contents + off); | |
1737 | h->got.offset |= 1; | |
1738 | } | |
1739 | } | |
44f745a6 AS |
1740 | else |
1741 | unresolved_reloc = FALSE; | |
252b5132 RH |
1742 | } |
1743 | else | |
1744 | { | |
1745 | BFD_ASSERT (local_got_offsets != NULL | |
1746 | && local_got_offsets[r_symndx] != (bfd_vma) -1); | |
1747 | ||
1748 | off = local_got_offsets[r_symndx]; | |
1749 | ||
1750 | /* The offset must always be a multiple of 4. We use | |
1751 | the least significant bit to record whether we have | |
1752 | already generated the necessary reloc. */ | |
1753 | if ((off & 1) != 0) | |
1754 | off &= ~1; | |
1755 | else | |
1756 | { | |
1757 | bfd_put_32 (output_bfd, relocation, sgot->contents + off); | |
1758 | ||
1759 | if (info->shared) | |
1760 | { | |
947216bf | 1761 | asection *s; |
252b5132 | 1762 | Elf_Internal_Rela outrel; |
947216bf | 1763 | bfd_byte *loc; |
252b5132 | 1764 | |
947216bf AM |
1765 | s = bfd_get_section_by_name (dynobj, ".rela.got"); |
1766 | BFD_ASSERT (s != NULL); | |
252b5132 RH |
1767 | |
1768 | outrel.r_offset = (sgot->output_section->vma | |
1769 | + sgot->output_offset | |
1770 | + off); | |
1771 | outrel.r_info = ELF32_R_INFO (0, R_68K_RELATIVE); | |
1772 | outrel.r_addend = relocation; | |
947216bf AM |
1773 | loc = s->contents; |
1774 | loc += s->reloc_count++ * sizeof (Elf32_External_Rela); | |
1775 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); | |
252b5132 RH |
1776 | } |
1777 | ||
1778 | local_got_offsets[r_symndx] |= 1; | |
1779 | } | |
1780 | } | |
1781 | ||
1782 | relocation = sgot->output_offset + off; | |
1783 | if (r_type == R_68K_GOT8O | |
1784 | || r_type == R_68K_GOT16O | |
1785 | || r_type == R_68K_GOT32O) | |
1786 | { | |
1787 | /* This relocation does not use the addend. */ | |
1788 | rel->r_addend = 0; | |
1789 | } | |
1790 | else | |
1791 | relocation += sgot->output_section->vma; | |
1792 | } | |
1793 | break; | |
1794 | ||
1795 | case R_68K_PLT8: | |
1796 | case R_68K_PLT16: | |
1797 | case R_68K_PLT32: | |
1798 | /* Relocation is to the entry for this symbol in the | |
1799 | procedure linkage table. */ | |
1800 | ||
1801 | /* Resolve a PLTxx reloc against a local symbol directly, | |
1802 | without using the procedure linkage table. */ | |
1803 | if (h == NULL) | |
1804 | break; | |
1805 | ||
1806 | if (h->plt.offset == (bfd_vma) -1 | |
1807 | || !elf_hash_table (info)->dynamic_sections_created) | |
1808 | { | |
1809 | /* We didn't make a PLT entry for this symbol. This | |
1810 | happens when statically linking PIC code, or when | |
1811 | using -Bsymbolic. */ | |
1812 | break; | |
1813 | } | |
1814 | ||
1815 | if (splt == NULL) | |
1816 | { | |
1817 | splt = bfd_get_section_by_name (dynobj, ".plt"); | |
1818 | BFD_ASSERT (splt != NULL); | |
1819 | } | |
1820 | ||
1821 | relocation = (splt->output_section->vma | |
1822 | + splt->output_offset | |
1823 | + h->plt.offset); | |
44f745a6 | 1824 | unresolved_reloc = FALSE; |
252b5132 RH |
1825 | break; |
1826 | ||
1827 | case R_68K_PLT8O: | |
1828 | case R_68K_PLT16O: | |
1829 | case R_68K_PLT32O: | |
1830 | /* Relocation is the offset of the entry for this symbol in | |
1831 | the procedure linkage table. */ | |
1832 | BFD_ASSERT (h != NULL && h->plt.offset != (bfd_vma) -1); | |
1833 | ||
1834 | if (splt == NULL) | |
1835 | { | |
1836 | splt = bfd_get_section_by_name (dynobj, ".plt"); | |
1837 | BFD_ASSERT (splt != NULL); | |
1838 | } | |
1839 | ||
1840 | relocation = h->plt.offset; | |
44f745a6 | 1841 | unresolved_reloc = FALSE; |
252b5132 RH |
1842 | |
1843 | /* This relocation does not use the addend. */ | |
1844 | rel->r_addend = 0; | |
1845 | ||
1846 | break; | |
1847 | ||
1848 | case R_68K_PC8: | |
1849 | case R_68K_PC16: | |
1850 | case R_68K_PC32: | |
b6152c34 AS |
1851 | if (h == NULL |
1852 | || (info->shared | |
f5385ebf | 1853 | && h->forced_local)) |
252b5132 RH |
1854 | break; |
1855 | /* Fall through. */ | |
1856 | case R_68K_8: | |
1857 | case R_68K_16: | |
1858 | case R_68K_32: | |
1859 | if (info->shared | |
ec338859 | 1860 | && r_symndx != 0 |
252b5132 | 1861 | && (input_section->flags & SEC_ALLOC) != 0 |
d2ff124f AS |
1862 | && (h == NULL |
1863 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
1864 | || h->root.type != bfd_link_hash_undefweak) | |
252b5132 RH |
1865 | && ((r_type != R_68K_PC8 |
1866 | && r_type != R_68K_PC16 | |
1867 | && r_type != R_68K_PC32) | |
d2ff124f AS |
1868 | || (h != NULL |
1869 | && h->dynindx != -1 | |
1870 | && (!info->symbolic | |
f5385ebf | 1871 | || !h->def_regular)))) |
252b5132 RH |
1872 | { |
1873 | Elf_Internal_Rela outrel; | |
947216bf | 1874 | bfd_byte *loc; |
b34976b6 | 1875 | bfd_boolean skip, relocate; |
252b5132 RH |
1876 | |
1877 | /* When generating a shared object, these relocations | |
1878 | are copied into the output file to be resolved at run | |
1879 | time. */ | |
1880 | ||
b34976b6 AM |
1881 | skip = FALSE; |
1882 | relocate = FALSE; | |
252b5132 | 1883 | |
c629eae0 JJ |
1884 | outrel.r_offset = |
1885 | _bfd_elf_section_offset (output_bfd, info, input_section, | |
1886 | rel->r_offset); | |
1887 | if (outrel.r_offset == (bfd_vma) -1) | |
b34976b6 | 1888 | skip = TRUE; |
0bb2d96a | 1889 | else if (outrel.r_offset == (bfd_vma) -2) |
b34976b6 | 1890 | skip = TRUE, relocate = TRUE; |
252b5132 RH |
1891 | outrel.r_offset += (input_section->output_section->vma |
1892 | + input_section->output_offset); | |
1893 | ||
1894 | if (skip) | |
0bb2d96a | 1895 | memset (&outrel, 0, sizeof outrel); |
252b5132 | 1896 | else if (h != NULL |
d2ff124f AS |
1897 | && h->dynindx != -1 |
1898 | && (r_type == R_68K_PC8 | |
1899 | || r_type == R_68K_PC16 | |
1900 | || r_type == R_68K_PC32 | |
1901 | || !info->shared | |
1902 | || !info->symbolic | |
f5385ebf | 1903 | || !h->def_regular)) |
252b5132 | 1904 | { |
252b5132 | 1905 | outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); |
d2ff124f | 1906 | outrel.r_addend = rel->r_addend; |
252b5132 RH |
1907 | } |
1908 | else | |
1909 | { | |
d2ff124f | 1910 | /* This symbol is local, or marked to become local. */ |
74541ad4 AM |
1911 | outrel.r_addend = relocation + rel->r_addend; |
1912 | ||
252b5132 RH |
1913 | if (r_type == R_68K_32) |
1914 | { | |
b34976b6 | 1915 | relocate = TRUE; |
252b5132 | 1916 | outrel.r_info = ELF32_R_INFO (0, R_68K_RELATIVE); |
252b5132 RH |
1917 | } |
1918 | else | |
1919 | { | |
1920 | long indx; | |
1921 | ||
8517fae7 | 1922 | if (bfd_is_abs_section (sec)) |
252b5132 RH |
1923 | indx = 0; |
1924 | else if (sec == NULL || sec->owner == NULL) | |
1925 | { | |
1926 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 1927 | return FALSE; |
252b5132 RH |
1928 | } |
1929 | else | |
1930 | { | |
1931 | asection *osec; | |
1932 | ||
74541ad4 AM |
1933 | /* We are turning this relocation into one |
1934 | against a section symbol. It would be | |
1935 | proper to subtract the symbol's value, | |
1936 | osec->vma, from the emitted reloc addend, | |
1937 | but ld.so expects buggy relocs. */ | |
252b5132 RH |
1938 | osec = sec->output_section; |
1939 | indx = elf_section_data (osec)->dynindx; | |
74541ad4 AM |
1940 | if (indx == 0) |
1941 | { | |
1942 | struct elf_link_hash_table *htab; | |
1943 | htab = elf_hash_table (info); | |
1944 | osec = htab->text_index_section; | |
1945 | indx = elf_section_data (osec)->dynindx; | |
1946 | } | |
1947 | BFD_ASSERT (indx != 0); | |
252b5132 RH |
1948 | } |
1949 | ||
252b5132 | 1950 | outrel.r_info = ELF32_R_INFO (indx, r_type); |
252b5132 RH |
1951 | } |
1952 | } | |
1953 | ||
d2ff124f AS |
1954 | sreloc = elf_section_data (input_section)->sreloc; |
1955 | if (sreloc == NULL) | |
1956 | abort (); | |
1957 | ||
947216bf AM |
1958 | loc = sreloc->contents; |
1959 | loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela); | |
1960 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); | |
252b5132 RH |
1961 | |
1962 | /* This reloc will be computed at runtime, so there's no | |
1963 | need to do anything now, except for R_68K_32 | |
1964 | relocations that have been turned into | |
1965 | R_68K_RELATIVE. */ | |
1966 | if (!relocate) | |
1967 | continue; | |
1968 | } | |
1969 | ||
1970 | break; | |
1971 | ||
1972 | case R_68K_GNU_VTINHERIT: | |
1973 | case R_68K_GNU_VTENTRY: | |
1974 | /* These are no-ops in the end. */ | |
1975 | continue; | |
1976 | ||
1977 | default: | |
1978 | break; | |
1979 | } | |
1980 | ||
44f745a6 AS |
1981 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections |
1982 | because such sections are not SEC_ALLOC and thus ld.so will | |
1983 | not process them. */ | |
1984 | if (unresolved_reloc | |
1985 | && !((input_section->flags & SEC_DEBUGGING) != 0 | |
f5385ebf | 1986 | && h->def_dynamic)) |
44f745a6 AS |
1987 | { |
1988 | (*_bfd_error_handler) | |
843fe662 | 1989 | (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"), |
d003868e AM |
1990 | input_bfd, |
1991 | input_section, | |
44f745a6 | 1992 | (long) rel->r_offset, |
843fe662 | 1993 | howto->name, |
44f745a6 AS |
1994 | h->root.root.string); |
1995 | return FALSE; | |
1996 | } | |
1997 | ||
252b5132 RH |
1998 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
1999 | contents, rel->r_offset, | |
2000 | relocation, rel->r_addend); | |
2001 | ||
2002 | if (r != bfd_reloc_ok) | |
2003 | { | |
44f745a6 AS |
2004 | const char *name; |
2005 | ||
2006 | if (h != NULL) | |
2007 | name = h->root.root.string; | |
2008 | else | |
252b5132 | 2009 | { |
44f745a6 AS |
2010 | name = bfd_elf_string_from_elf_section (input_bfd, |
2011 | symtab_hdr->sh_link, | |
2012 | sym->st_name); | |
2013 | if (name == NULL) | |
2014 | return FALSE; | |
2015 | if (*name == '\0') | |
2016 | name = bfd_section_name (input_bfd, sec); | |
2017 | } | |
252b5132 | 2018 | |
44f745a6 AS |
2019 | if (r == bfd_reloc_overflow) |
2020 | { | |
2021 | if (!(info->callbacks->reloc_overflow | |
dfeffb9f L |
2022 | (info, (h ? &h->root : NULL), name, howto->name, |
2023 | (bfd_vma) 0, input_bfd, input_section, | |
2024 | rel->r_offset))) | |
44f745a6 AS |
2025 | return FALSE; |
2026 | } | |
2027 | else | |
2028 | { | |
2029 | (*_bfd_error_handler) | |
d003868e AM |
2030 | (_("%B(%A+0x%lx): reloc against `%s': error %d"), |
2031 | input_bfd, input_section, | |
44f745a6 AS |
2032 | (long) rel->r_offset, name, (int) r); |
2033 | return FALSE; | |
252b5132 RH |
2034 | } |
2035 | } | |
2036 | } | |
2037 | ||
b34976b6 | 2038 | return TRUE; |
252b5132 RH |
2039 | } |
2040 | ||
cc3e26be RS |
2041 | /* Install an M_68K_PC32 relocation against VALUE at offset OFFSET |
2042 | into section SEC. */ | |
2043 | ||
2044 | static void | |
2045 | elf_m68k_install_pc32 (asection *sec, bfd_vma offset, bfd_vma value) | |
2046 | { | |
2047 | /* Make VALUE PC-relative. */ | |
2048 | value -= sec->output_section->vma + offset; | |
2049 | ||
2050 | /* Apply any in-place addend. */ | |
2051 | value += bfd_get_32 (sec->owner, sec->contents + offset); | |
2052 | ||
2053 | bfd_put_32 (sec->owner, value, sec->contents + offset); | |
2054 | } | |
2055 | ||
252b5132 RH |
2056 | /* Finish up dynamic symbol handling. We set the contents of various |
2057 | dynamic sections here. */ | |
2058 | ||
b34976b6 | 2059 | static bfd_boolean |
252b5132 RH |
2060 | elf_m68k_finish_dynamic_symbol (output_bfd, info, h, sym) |
2061 | bfd *output_bfd; | |
2062 | struct bfd_link_info *info; | |
2063 | struct elf_link_hash_entry *h; | |
2064 | Elf_Internal_Sym *sym; | |
2065 | { | |
2066 | bfd *dynobj; | |
2067 | ||
2068 | dynobj = elf_hash_table (info)->dynobj; | |
2069 | ||
2070 | if (h->plt.offset != (bfd_vma) -1) | |
2071 | { | |
cc3e26be | 2072 | const struct elf_m68k_plt_info *plt_info; |
252b5132 RH |
2073 | asection *splt; |
2074 | asection *sgot; | |
2075 | asection *srela; | |
2076 | bfd_vma plt_index; | |
2077 | bfd_vma got_offset; | |
2078 | Elf_Internal_Rela rela; | |
947216bf | 2079 | bfd_byte *loc; |
252b5132 RH |
2080 | |
2081 | /* This symbol has an entry in the procedure linkage table. Set | |
2082 | it up. */ | |
2083 | ||
2084 | BFD_ASSERT (h->dynindx != -1); | |
2085 | ||
cc3e26be | 2086 | plt_info = elf_m68k_hash_table (info)->plt_info; |
252b5132 RH |
2087 | splt = bfd_get_section_by_name (dynobj, ".plt"); |
2088 | sgot = bfd_get_section_by_name (dynobj, ".got.plt"); | |
2089 | srela = bfd_get_section_by_name (dynobj, ".rela.plt"); | |
2090 | BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL); | |
2091 | ||
2092 | /* Get the index in the procedure linkage table which | |
2093 | corresponds to this symbol. This is the index of this symbol | |
2094 | in all the symbols for which we are making plt entries. The | |
2095 | first entry in the procedure linkage table is reserved. */ | |
cc3e26be | 2096 | plt_index = (h->plt.offset / plt_info->size) - 1; |
252b5132 RH |
2097 | |
2098 | /* Get the offset into the .got table of the entry that | |
2099 | corresponds to this function. Each .got entry is 4 bytes. | |
2100 | The first three are reserved. */ | |
2101 | got_offset = (plt_index + 3) * 4; | |
2102 | ||
cc3e26be RS |
2103 | memcpy (splt->contents + h->plt.offset, |
2104 | plt_info->symbol_entry, | |
2105 | plt_info->size); | |
2106 | ||
2107 | elf_m68k_install_pc32 (splt, h->plt.offset + plt_info->symbol_relocs.got, | |
2108 | (sgot->output_section->vma | |
2109 | + sgot->output_offset | |
2110 | + got_offset)); | |
252b5132 RH |
2111 | |
2112 | bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela), | |
cc3e26be RS |
2113 | splt->contents |
2114 | + h->plt.offset | |
2115 | + plt_info->symbol_resolve_entry + 2); | |
2116 | ||
2117 | elf_m68k_install_pc32 (splt, h->plt.offset + plt_info->symbol_relocs.plt, | |
2118 | splt->output_section->vma); | |
252b5132 RH |
2119 | |
2120 | /* Fill in the entry in the global offset table. */ | |
2121 | bfd_put_32 (output_bfd, | |
2122 | (splt->output_section->vma | |
2123 | + splt->output_offset | |
2124 | + h->plt.offset | |
cc3e26be | 2125 | + plt_info->symbol_resolve_entry), |
252b5132 RH |
2126 | sgot->contents + got_offset); |
2127 | ||
2128 | /* Fill in the entry in the .rela.plt section. */ | |
2129 | rela.r_offset = (sgot->output_section->vma | |
2130 | + sgot->output_offset | |
2131 | + got_offset); | |
2132 | rela.r_info = ELF32_R_INFO (h->dynindx, R_68K_JMP_SLOT); | |
2133 | rela.r_addend = 0; | |
947216bf AM |
2134 | loc = srela->contents + plt_index * sizeof (Elf32_External_Rela); |
2135 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); | |
252b5132 | 2136 | |
f5385ebf | 2137 | if (!h->def_regular) |
252b5132 RH |
2138 | { |
2139 | /* Mark the symbol as undefined, rather than as defined in | |
2140 | the .plt section. Leave the value alone. */ | |
2141 | sym->st_shndx = SHN_UNDEF; | |
2142 | } | |
2143 | } | |
2144 | ||
2145 | if (h->got.offset != (bfd_vma) -1) | |
2146 | { | |
2147 | asection *sgot; | |
2148 | asection *srela; | |
2149 | Elf_Internal_Rela rela; | |
947216bf | 2150 | bfd_byte *loc; |
252b5132 RH |
2151 | |
2152 | /* This symbol has an entry in the global offset table. Set it | |
2153 | up. */ | |
2154 | ||
2155 | sgot = bfd_get_section_by_name (dynobj, ".got"); | |
2156 | srela = bfd_get_section_by_name (dynobj, ".rela.got"); | |
2157 | BFD_ASSERT (sgot != NULL && srela != NULL); | |
2158 | ||
2159 | rela.r_offset = (sgot->output_section->vma | |
2160 | + sgot->output_offset | |
dc810e39 | 2161 | + (h->got.offset &~ (bfd_vma) 1)); |
252b5132 RH |
2162 | |
2163 | /* If this is a -Bsymbolic link, and the symbol is defined | |
2164 | locally, we just want to emit a RELATIVE reloc. Likewise if | |
2165 | the symbol was forced to be local because of a version file. | |
2166 | The entry in the global offset table will already have been | |
2167 | initialized in the relocate_section function. */ | |
2168 | if (info->shared | |
a5ad465a AS |
2169 | && (info->symbolic |
2170 | || h->dynindx == -1 | |
f5385ebf AM |
2171 | || h->forced_local) |
2172 | && h->def_regular) | |
252b5132 RH |
2173 | { |
2174 | rela.r_info = ELF32_R_INFO (0, R_68K_RELATIVE); | |
2175 | rela.r_addend = bfd_get_signed_32 (output_bfd, | |
2176 | (sgot->contents | |
dc810e39 | 2177 | + (h->got.offset &~ (bfd_vma) 1))); |
252b5132 RH |
2178 | } |
2179 | else | |
2180 | { | |
2181 | bfd_put_32 (output_bfd, (bfd_vma) 0, | |
dc810e39 | 2182 | sgot->contents + (h->got.offset &~ (bfd_vma) 1)); |
252b5132 RH |
2183 | rela.r_info = ELF32_R_INFO (h->dynindx, R_68K_GLOB_DAT); |
2184 | rela.r_addend = 0; | |
2185 | } | |
2186 | ||
947216bf AM |
2187 | loc = srela->contents; |
2188 | loc += srela->reloc_count++ * sizeof (Elf32_External_Rela); | |
2189 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); | |
252b5132 RH |
2190 | } |
2191 | ||
f5385ebf | 2192 | if (h->needs_copy) |
252b5132 RH |
2193 | { |
2194 | asection *s; | |
2195 | Elf_Internal_Rela rela; | |
947216bf | 2196 | bfd_byte *loc; |
252b5132 RH |
2197 | |
2198 | /* This symbol needs a copy reloc. Set it up. */ | |
2199 | ||
2200 | BFD_ASSERT (h->dynindx != -1 | |
2201 | && (h->root.type == bfd_link_hash_defined | |
2202 | || h->root.type == bfd_link_hash_defweak)); | |
2203 | ||
2204 | s = bfd_get_section_by_name (h->root.u.def.section->owner, | |
2205 | ".rela.bss"); | |
2206 | BFD_ASSERT (s != NULL); | |
2207 | ||
2208 | rela.r_offset = (h->root.u.def.value | |
2209 | + h->root.u.def.section->output_section->vma | |
2210 | + h->root.u.def.section->output_offset); | |
2211 | rela.r_info = ELF32_R_INFO (h->dynindx, R_68K_COPY); | |
2212 | rela.r_addend = 0; | |
947216bf AM |
2213 | loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela); |
2214 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); | |
252b5132 RH |
2215 | } |
2216 | ||
2217 | /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */ | |
2218 | if (strcmp (h->root.root.string, "_DYNAMIC") == 0 | |
22edb2f1 | 2219 | || h == elf_hash_table (info)->hgot) |
252b5132 RH |
2220 | sym->st_shndx = SHN_ABS; |
2221 | ||
b34976b6 | 2222 | return TRUE; |
252b5132 RH |
2223 | } |
2224 | ||
2225 | /* Finish up the dynamic sections. */ | |
2226 | ||
b34976b6 | 2227 | static bfd_boolean |
252b5132 RH |
2228 | elf_m68k_finish_dynamic_sections (output_bfd, info) |
2229 | bfd *output_bfd; | |
2230 | struct bfd_link_info *info; | |
2231 | { | |
2232 | bfd *dynobj; | |
2233 | asection *sgot; | |
2234 | asection *sdyn; | |
2235 | ||
2236 | dynobj = elf_hash_table (info)->dynobj; | |
2237 | ||
2238 | sgot = bfd_get_section_by_name (dynobj, ".got.plt"); | |
2239 | BFD_ASSERT (sgot != NULL); | |
2240 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); | |
2241 | ||
2242 | if (elf_hash_table (info)->dynamic_sections_created) | |
2243 | { | |
2244 | asection *splt; | |
2245 | Elf32_External_Dyn *dyncon, *dynconend; | |
2246 | ||
2247 | splt = bfd_get_section_by_name (dynobj, ".plt"); | |
2248 | BFD_ASSERT (splt != NULL && sdyn != NULL); | |
2249 | ||
2250 | dyncon = (Elf32_External_Dyn *) sdyn->contents; | |
eea6121a | 2251 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); |
252b5132 RH |
2252 | for (; dyncon < dynconend; dyncon++) |
2253 | { | |
2254 | Elf_Internal_Dyn dyn; | |
2255 | const char *name; | |
2256 | asection *s; | |
2257 | ||
2258 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); | |
2259 | ||
2260 | switch (dyn.d_tag) | |
2261 | { | |
2262 | default: | |
2263 | break; | |
2264 | ||
2265 | case DT_PLTGOT: | |
2266 | name = ".got"; | |
2267 | goto get_vma; | |
2268 | case DT_JMPREL: | |
2269 | name = ".rela.plt"; | |
2270 | get_vma: | |
2271 | s = bfd_get_section_by_name (output_bfd, name); | |
2272 | BFD_ASSERT (s != NULL); | |
2273 | dyn.d_un.d_ptr = s->vma; | |
2274 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); | |
2275 | break; | |
2276 | ||
2277 | case DT_PLTRELSZ: | |
2278 | s = bfd_get_section_by_name (output_bfd, ".rela.plt"); | |
2279 | BFD_ASSERT (s != NULL); | |
eea6121a | 2280 | dyn.d_un.d_val = s->size; |
252b5132 RH |
2281 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
2282 | break; | |
2283 | ||
2284 | case DT_RELASZ: | |
2285 | /* The procedure linkage table relocs (DT_JMPREL) should | |
2286 | not be included in the overall relocs (DT_RELA). | |
2287 | Therefore, we override the DT_RELASZ entry here to | |
2288 | make it not include the JMPREL relocs. Since the | |
2289 | linker script arranges for .rela.plt to follow all | |
2290 | other relocation sections, we don't have to worry | |
2291 | about changing the DT_RELA entry. */ | |
2292 | s = bfd_get_section_by_name (output_bfd, ".rela.plt"); | |
2293 | if (s != NULL) | |
eea6121a | 2294 | dyn.d_un.d_val -= s->size; |
252b5132 RH |
2295 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
2296 | break; | |
2297 | } | |
2298 | } | |
2299 | ||
2300 | /* Fill in the first entry in the procedure linkage table. */ | |
eea6121a | 2301 | if (splt->size > 0) |
252b5132 | 2302 | { |
cc3e26be RS |
2303 | const struct elf_m68k_plt_info *plt_info; |
2304 | ||
2305 | plt_info = elf_m68k_hash_table (info)->plt_info; | |
2306 | memcpy (splt->contents, plt_info->plt0_entry, plt_info->size); | |
2307 | ||
2308 | elf_m68k_install_pc32 (splt, plt_info->plt0_relocs.got4, | |
2309 | (sgot->output_section->vma | |
2310 | + sgot->output_offset | |
2311 | + 4)); | |
2312 | ||
2313 | elf_m68k_install_pc32 (splt, plt_info->plt0_relocs.got8, | |
2314 | (sgot->output_section->vma | |
2315 | + sgot->output_offset | |
2316 | + 8)); | |
2317 | ||
2318 | elf_section_data (splt->output_section)->this_hdr.sh_entsize | |
2319 | = plt_info->size; | |
252b5132 | 2320 | } |
252b5132 RH |
2321 | } |
2322 | ||
2323 | /* Fill in the first three entries in the global offset table. */ | |
eea6121a | 2324 | if (sgot->size > 0) |
252b5132 RH |
2325 | { |
2326 | if (sdyn == NULL) | |
2327 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents); | |
2328 | else | |
2329 | bfd_put_32 (output_bfd, | |
2330 | sdyn->output_section->vma + sdyn->output_offset, | |
2331 | sgot->contents); | |
2332 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4); | |
2333 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8); | |
2334 | } | |
2335 | ||
2336 | elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4; | |
2337 | ||
b34976b6 | 2338 | return TRUE; |
252b5132 RH |
2339 | } |
2340 | ||
0752970e NC |
2341 | /* Given a .data section and a .emreloc in-memory section, store |
2342 | relocation information into the .emreloc section which can be | |
2343 | used at runtime to relocate the section. This is called by the | |
2344 | linker when the --embedded-relocs switch is used. This is called | |
2345 | after the add_symbols entry point has been called for all the | |
2346 | objects, and before the final_link entry point is called. */ | |
2347 | ||
b34976b6 | 2348 | bfd_boolean |
0752970e NC |
2349 | bfd_m68k_elf32_create_embedded_relocs (abfd, info, datasec, relsec, errmsg) |
2350 | bfd *abfd; | |
2351 | struct bfd_link_info *info; | |
2352 | asection *datasec; | |
2353 | asection *relsec; | |
2354 | char **errmsg; | |
2355 | { | |
2356 | Elf_Internal_Shdr *symtab_hdr; | |
6cdc0ccc AM |
2357 | Elf_Internal_Sym *isymbuf = NULL; |
2358 | Elf_Internal_Rela *internal_relocs = NULL; | |
0752970e NC |
2359 | Elf_Internal_Rela *irel, *irelend; |
2360 | bfd_byte *p; | |
dc810e39 | 2361 | bfd_size_type amt; |
0752970e | 2362 | |
1049f94e | 2363 | BFD_ASSERT (! info->relocatable); |
0752970e NC |
2364 | |
2365 | *errmsg = NULL; | |
2366 | ||
2367 | if (datasec->reloc_count == 0) | |
b34976b6 | 2368 | return TRUE; |
0752970e NC |
2369 | |
2370 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
9ad5cbcf | 2371 | |
0752970e | 2372 | /* Get a copy of the native relocations. */ |
45d6a902 | 2373 | internal_relocs = (_bfd_elf_link_read_relocs |
0752970e NC |
2374 | (abfd, datasec, (PTR) NULL, (Elf_Internal_Rela *) NULL, |
2375 | info->keep_memory)); | |
2376 | if (internal_relocs == NULL) | |
2377 | goto error_return; | |
0752970e | 2378 | |
dc810e39 AM |
2379 | amt = (bfd_size_type) datasec->reloc_count * 12; |
2380 | relsec->contents = (bfd_byte *) bfd_alloc (abfd, amt); | |
0752970e NC |
2381 | if (relsec->contents == NULL) |
2382 | goto error_return; | |
2383 | ||
2384 | p = relsec->contents; | |
2385 | ||
2386 | irelend = internal_relocs + datasec->reloc_count; | |
2387 | for (irel = internal_relocs; irel < irelend; irel++, p += 12) | |
2388 | { | |
2389 | asection *targetsec; | |
2390 | ||
2391 | /* We are going to write a four byte longword into the runtime | |
2392 | reloc section. The longword will be the address in the data | |
2393 | section which must be relocated. It is followed by the name | |
2394 | of the target section NUL-padded or truncated to 8 | |
2395 | characters. */ | |
2396 | ||
2397 | /* We can only relocate absolute longword relocs at run time. */ | |
2398 | if (ELF32_R_TYPE (irel->r_info) != (int) R_68K_32) | |
2399 | { | |
2400 | *errmsg = _("unsupported reloc type"); | |
2401 | bfd_set_error (bfd_error_bad_value); | |
2402 | goto error_return; | |
2403 | } | |
2404 | ||
2405 | /* Get the target section referred to by the reloc. */ | |
2406 | if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info) | |
2407 | { | |
0752970e | 2408 | /* A local symbol. */ |
6cdc0ccc AM |
2409 | Elf_Internal_Sym *isym; |
2410 | ||
2411 | /* Read this BFD's local symbols if we haven't done so already. */ | |
2412 | if (isymbuf == NULL) | |
2413 | { | |
2414 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; | |
2415 | if (isymbuf == NULL) | |
2416 | isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, | |
2417 | symtab_hdr->sh_info, 0, | |
2418 | NULL, NULL, NULL); | |
2419 | if (isymbuf == NULL) | |
2420 | goto error_return; | |
2421 | } | |
0752970e | 2422 | |
6cdc0ccc AM |
2423 | isym = isymbuf + ELF32_R_SYM (irel->r_info); |
2424 | targetsec = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
0752970e NC |
2425 | } |
2426 | else | |
2427 | { | |
2428 | unsigned long indx; | |
2429 | struct elf_link_hash_entry *h; | |
2430 | ||
2431 | /* An external symbol. */ | |
2432 | indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info; | |
2433 | h = elf_sym_hashes (abfd)[indx]; | |
2434 | BFD_ASSERT (h != NULL); | |
2435 | if (h->root.type == bfd_link_hash_defined | |
2436 | || h->root.type == bfd_link_hash_defweak) | |
2437 | targetsec = h->root.u.def.section; | |
2438 | else | |
2439 | targetsec = NULL; | |
2440 | } | |
2441 | ||
2442 | bfd_put_32 (abfd, irel->r_offset + datasec->output_offset, p); | |
2443 | memset (p + 4, 0, 8); | |
2444 | if (targetsec != NULL) | |
f075ee0c | 2445 | strncpy ((char *) p + 4, targetsec->output_section->name, 8); |
0752970e | 2446 | } |
c3668558 | 2447 | |
6cdc0ccc AM |
2448 | if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf) |
2449 | free (isymbuf); | |
2450 | if (internal_relocs != NULL | |
2451 | && elf_section_data (datasec)->relocs != internal_relocs) | |
2452 | free (internal_relocs); | |
b34976b6 | 2453 | return TRUE; |
0752970e NC |
2454 | |
2455 | error_return: | |
6cdc0ccc AM |
2456 | if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf) |
2457 | free (isymbuf); | |
2458 | if (internal_relocs != NULL | |
2459 | && elf_section_data (datasec)->relocs != internal_relocs) | |
2460 | free (internal_relocs); | |
b34976b6 | 2461 | return FALSE; |
0752970e NC |
2462 | } |
2463 | ||
aa91b392 | 2464 | static enum elf_reloc_type_class |
f51e552e AM |
2465 | elf32_m68k_reloc_type_class (rela) |
2466 | const Elf_Internal_Rela *rela; | |
aa91b392 | 2467 | { |
f51e552e | 2468 | switch ((int) ELF32_R_TYPE (rela->r_info)) |
aa91b392 AS |
2469 | { |
2470 | case R_68K_RELATIVE: | |
2471 | return reloc_class_relative; | |
2472 | case R_68K_JMP_SLOT: | |
2473 | return reloc_class_plt; | |
2474 | case R_68K_COPY: | |
2475 | return reloc_class_copy; | |
2476 | default: | |
2477 | return reloc_class_normal; | |
2478 | } | |
2479 | } | |
2480 | ||
1715e0e3 AS |
2481 | /* Return address for Ith PLT stub in section PLT, for relocation REL |
2482 | or (bfd_vma) -1 if it should not be included. */ | |
2483 | ||
2484 | static bfd_vma | |
2485 | elf_m68k_plt_sym_val (bfd_vma i, const asection *plt, | |
2486 | const arelent *rel ATTRIBUTE_UNUSED) | |
2487 | { | |
cc3e26be | 2488 | return plt->vma + (i + 1) * elf_m68k_get_plt_info (plt->owner)->size; |
1715e0e3 AS |
2489 | } |
2490 | ||
252b5132 RH |
2491 | #define TARGET_BIG_SYM bfd_elf32_m68k_vec |
2492 | #define TARGET_BIG_NAME "elf32-m68k" | |
2493 | #define ELF_MACHINE_CODE EM_68K | |
2494 | #define ELF_MAXPAGESIZE 0x2000 | |
2495 | #define elf_backend_create_dynamic_sections \ | |
2496 | _bfd_elf_create_dynamic_sections | |
2497 | #define bfd_elf32_bfd_link_hash_table_create \ | |
2498 | elf_m68k_link_hash_table_create | |
c152c796 | 2499 | #define bfd_elf32_bfd_final_link bfd_elf_gc_common_final_link |
252b5132 RH |
2500 | |
2501 | #define elf_backend_check_relocs elf_m68k_check_relocs | |
cc3e26be RS |
2502 | #define elf_backend_always_size_sections \ |
2503 | elf_m68k_always_size_sections | |
252b5132 RH |
2504 | #define elf_backend_adjust_dynamic_symbol \ |
2505 | elf_m68k_adjust_dynamic_symbol | |
2506 | #define elf_backend_size_dynamic_sections \ | |
2507 | elf_m68k_size_dynamic_sections | |
74541ad4 | 2508 | #define elf_backend_init_index_section _bfd_elf_init_1_index_section |
252b5132 RH |
2509 | #define elf_backend_relocate_section elf_m68k_relocate_section |
2510 | #define elf_backend_finish_dynamic_symbol \ | |
2511 | elf_m68k_finish_dynamic_symbol | |
2512 | #define elf_backend_finish_dynamic_sections \ | |
2513 | elf_m68k_finish_dynamic_sections | |
2514 | #define elf_backend_gc_mark_hook elf_m68k_gc_mark_hook | |
2515 | #define elf_backend_gc_sweep_hook elf_m68k_gc_sweep_hook | |
9e1281c7 CM |
2516 | #define bfd_elf32_bfd_merge_private_bfd_data \ |
2517 | elf32_m68k_merge_private_bfd_data | |
2518 | #define bfd_elf32_bfd_set_private_flags \ | |
2519 | elf32_m68k_set_private_flags | |
2520 | #define bfd_elf32_bfd_print_private_bfd_data \ | |
2521 | elf32_m68k_print_private_bfd_data | |
aa91b392 | 2522 | #define elf_backend_reloc_type_class elf32_m68k_reloc_type_class |
1715e0e3 | 2523 | #define elf_backend_plt_sym_val elf_m68k_plt_sym_val |
266abb8f | 2524 | #define elf_backend_object_p elf32_m68k_object_p |
9e1281c7 | 2525 | |
252b5132 | 2526 | #define elf_backend_can_gc_sections 1 |
51b64d56 | 2527 | #define elf_backend_can_refcount 1 |
252b5132 RH |
2528 | #define elf_backend_want_got_plt 1 |
2529 | #define elf_backend_plt_readonly 1 | |
2530 | #define elf_backend_want_plt_sym 0 | |
2531 | #define elf_backend_got_header_size 12 | |
b491616a | 2532 | #define elf_backend_rela_normal 1 |
252b5132 RH |
2533 | |
2534 | #include "elf32-target.h" |