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 | |
9 | the Free Software Foundation; either version 2 of the License, or | |
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 | |
3e110533 | 19 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ |
252b5132 RH |
20 | |
21 | #include "bfd.h" | |
22 | #include "sysdep.h" | |
23 | #include "bfdlink.h" | |
24 | #include "libbfd.h" | |
25 | #include "elf-bfd.h" | |
26 | #include "elf/m68k.h" | |
266abb8f | 27 | #include "opcode/m68k.h" |
252b5132 RH |
28 | |
29 | static reloc_howto_type *reloc_type_lookup | |
30 | PARAMS ((bfd *, bfd_reloc_code_real_type)); | |
31 | static void rtype_to_howto | |
947216bf | 32 | PARAMS ((bfd *, arelent *, Elf_Internal_Rela *)); |
252b5132 RH |
33 | static struct bfd_hash_entry *elf_m68k_link_hash_newfunc |
34 | PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *)); | |
35 | static struct bfd_link_hash_table *elf_m68k_link_hash_table_create | |
36 | PARAMS ((bfd *)); | |
b34976b6 | 37 | static bfd_boolean elf_m68k_check_relocs |
252b5132 RH |
38 | PARAMS ((bfd *, struct bfd_link_info *, asection *, |
39 | const Elf_Internal_Rela *)); | |
b34976b6 | 40 | static bfd_boolean elf_m68k_adjust_dynamic_symbol |
252b5132 | 41 | PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *)); |
b34976b6 | 42 | static bfd_boolean elf_m68k_size_dynamic_sections |
252b5132 | 43 | PARAMS ((bfd *, struct bfd_link_info *)); |
0cca5f05 AS |
44 | static bfd_boolean elf_m68k_discard_copies |
45 | PARAMS ((struct elf_link_hash_entry *, PTR)); | |
b34976b6 | 46 | static bfd_boolean elf_m68k_relocate_section |
252b5132 RH |
47 | PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, |
48 | Elf_Internal_Rela *, Elf_Internal_Sym *, asection **)); | |
b34976b6 | 49 | static bfd_boolean elf_m68k_finish_dynamic_symbol |
252b5132 RH |
50 | PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *, |
51 | Elf_Internal_Sym *)); | |
b34976b6 | 52 | static bfd_boolean elf_m68k_finish_dynamic_sections |
252b5132 RH |
53 | PARAMS ((bfd *, struct bfd_link_info *)); |
54 | ||
b34976b6 | 55 | static bfd_boolean elf32_m68k_set_private_flags |
9e1281c7 | 56 | PARAMS ((bfd *, flagword)); |
b34976b6 | 57 | static bfd_boolean elf32_m68k_merge_private_bfd_data |
9e1281c7 | 58 | PARAMS ((bfd *, bfd *)); |
b34976b6 | 59 | static bfd_boolean elf32_m68k_print_private_bfd_data |
9e1281c7 | 60 | PARAMS ((bfd *, PTR)); |
aa91b392 | 61 | static enum elf_reloc_type_class elf32_m68k_reloc_type_class |
f51e552e | 62 | PARAMS ((const Elf_Internal_Rela *)); |
9e1281c7 | 63 | |
252b5132 | 64 | static reloc_howto_type howto_table[] = { |
b34976b6 AM |
65 | HOWTO(R_68K_NONE, 0, 0, 0, FALSE,0, complain_overflow_dont, bfd_elf_generic_reloc, "R_68K_NONE", FALSE, 0, 0x00000000,FALSE), |
66 | HOWTO(R_68K_32, 0, 2,32, FALSE,0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_32", FALSE, 0, 0xffffffff,FALSE), | |
67 | HOWTO(R_68K_16, 0, 1,16, FALSE,0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_16", FALSE, 0, 0x0000ffff,FALSE), | |
68 | HOWTO(R_68K_8, 0, 0, 8, FALSE,0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_8", FALSE, 0, 0x000000ff,FALSE), | |
69 | HOWTO(R_68K_PC32, 0, 2,32, TRUE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_PC32", FALSE, 0, 0xffffffff,TRUE), | |
70 | HOWTO(R_68K_PC16, 0, 1,16, TRUE, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_PC16", FALSE, 0, 0x0000ffff,TRUE), | |
71 | HOWTO(R_68K_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_PC8", FALSE, 0, 0x000000ff,TRUE), | |
72 | HOWTO(R_68K_GOT32, 0, 2,32, TRUE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_GOT32", FALSE, 0, 0xffffffff,TRUE), | |
73 | HOWTO(R_68K_GOT16, 0, 1,16, TRUE, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_GOT16", FALSE, 0, 0x0000ffff,TRUE), | |
74 | HOWTO(R_68K_GOT8, 0, 0, 8, TRUE, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_GOT8", FALSE, 0, 0x000000ff,TRUE), | |
75 | HOWTO(R_68K_GOT32O, 0, 2,32, FALSE,0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_GOT32O", FALSE, 0, 0xffffffff,FALSE), | |
76 | HOWTO(R_68K_GOT16O, 0, 1,16, FALSE,0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_GOT16O", FALSE, 0, 0x0000ffff,FALSE), | |
77 | HOWTO(R_68K_GOT8O, 0, 0, 8, FALSE,0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_GOT8O", FALSE, 0, 0x000000ff,FALSE), | |
78 | HOWTO(R_68K_PLT32, 0, 2,32, TRUE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_PLT32", FALSE, 0, 0xffffffff,TRUE), | |
79 | HOWTO(R_68K_PLT16, 0, 1,16, TRUE, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_PLT16", FALSE, 0, 0x0000ffff,TRUE), | |
80 | HOWTO(R_68K_PLT8, 0, 0, 8, TRUE, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_PLT8", FALSE, 0, 0x000000ff,TRUE), | |
81 | HOWTO(R_68K_PLT32O, 0, 2,32, FALSE,0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_PLT32O", FALSE, 0, 0xffffffff,FALSE), | |
82 | HOWTO(R_68K_PLT16O, 0, 1,16, FALSE,0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_PLT16O", FALSE, 0, 0x0000ffff,FALSE), | |
83 | HOWTO(R_68K_PLT8O, 0, 0, 8, FALSE,0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_PLT8O", FALSE, 0, 0x000000ff,FALSE), | |
84 | HOWTO(R_68K_COPY, 0, 0, 0, FALSE,0, complain_overflow_dont, bfd_elf_generic_reloc, "R_68K_COPY", FALSE, 0, 0xffffffff,FALSE), | |
85 | 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), | |
86 | 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), | |
87 | HOWTO(R_68K_RELATIVE, 0, 2,32, FALSE,0, complain_overflow_dont, bfd_elf_generic_reloc, "R_68K_RELATIVE", FALSE, 0, 0xffffffff,FALSE), | |
ae9a127f | 88 | /* GNU extension to record C++ vtable hierarchy. */ |
252b5132 RH |
89 | HOWTO (R_68K_GNU_VTINHERIT, /* type */ |
90 | 0, /* rightshift */ | |
91 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
92 | 0, /* bitsize */ | |
b34976b6 | 93 | FALSE, /* pc_relative */ |
252b5132 RH |
94 | 0, /* bitpos */ |
95 | complain_overflow_dont, /* complain_on_overflow */ | |
96 | NULL, /* special_function */ | |
97 | "R_68K_GNU_VTINHERIT", /* name */ | |
b34976b6 | 98 | FALSE, /* partial_inplace */ |
252b5132 RH |
99 | 0, /* src_mask */ |
100 | 0, /* dst_mask */ | |
b34976b6 | 101 | FALSE), |
ae9a127f | 102 | /* GNU extension to record C++ vtable member usage. */ |
252b5132 RH |
103 | HOWTO (R_68K_GNU_VTENTRY, /* type */ |
104 | 0, /* rightshift */ | |
105 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
106 | 0, /* bitsize */ | |
b34976b6 | 107 | FALSE, /* pc_relative */ |
252b5132 RH |
108 | 0, /* bitpos */ |
109 | complain_overflow_dont, /* complain_on_overflow */ | |
110 | _bfd_elf_rel_vtable_reloc_fn, /* special_function */ | |
111 | "R_68K_GNU_VTENTRY", /* name */ | |
b34976b6 | 112 | FALSE, /* partial_inplace */ |
252b5132 RH |
113 | 0, /* src_mask */ |
114 | 0, /* dst_mask */ | |
b34976b6 | 115 | FALSE), |
252b5132 RH |
116 | }; |
117 | ||
118 | static void | |
119 | rtype_to_howto (abfd, cache_ptr, dst) | |
121089cb | 120 | bfd *abfd ATTRIBUTE_UNUSED; |
252b5132 RH |
121 | arelent *cache_ptr; |
122 | Elf_Internal_Rela *dst; | |
123 | { | |
124 | BFD_ASSERT (ELF32_R_TYPE(dst->r_info) < (unsigned int) R_68K_max); | |
125 | cache_ptr->howto = &howto_table[ELF32_R_TYPE(dst->r_info)]; | |
126 | } | |
127 | ||
128 | #define elf_info_to_howto rtype_to_howto | |
129 | ||
130 | static const struct | |
131 | { | |
132 | bfd_reloc_code_real_type bfd_val; | |
133 | int elf_val; | |
134 | } reloc_map[] = { | |
135 | { BFD_RELOC_NONE, R_68K_NONE }, | |
136 | { BFD_RELOC_32, R_68K_32 }, | |
137 | { BFD_RELOC_16, R_68K_16 }, | |
138 | { BFD_RELOC_8, R_68K_8 }, | |
139 | { BFD_RELOC_32_PCREL, R_68K_PC32 }, | |
140 | { BFD_RELOC_16_PCREL, R_68K_PC16 }, | |
141 | { BFD_RELOC_8_PCREL, R_68K_PC8 }, | |
142 | { BFD_RELOC_32_GOT_PCREL, R_68K_GOT32 }, | |
143 | { BFD_RELOC_16_GOT_PCREL, R_68K_GOT16 }, | |
144 | { BFD_RELOC_8_GOT_PCREL, R_68K_GOT8 }, | |
145 | { BFD_RELOC_32_GOTOFF, R_68K_GOT32O }, | |
146 | { BFD_RELOC_16_GOTOFF, R_68K_GOT16O }, | |
147 | { BFD_RELOC_8_GOTOFF, R_68K_GOT8O }, | |
148 | { BFD_RELOC_32_PLT_PCREL, R_68K_PLT32 }, | |
149 | { BFD_RELOC_16_PLT_PCREL, R_68K_PLT16 }, | |
150 | { BFD_RELOC_8_PLT_PCREL, R_68K_PLT8 }, | |
151 | { BFD_RELOC_32_PLTOFF, R_68K_PLT32O }, | |
152 | { BFD_RELOC_16_PLTOFF, R_68K_PLT16O }, | |
153 | { BFD_RELOC_8_PLTOFF, R_68K_PLT8O }, | |
154 | { BFD_RELOC_NONE, R_68K_COPY }, | |
155 | { BFD_RELOC_68K_GLOB_DAT, R_68K_GLOB_DAT }, | |
156 | { BFD_RELOC_68K_JMP_SLOT, R_68K_JMP_SLOT }, | |
157 | { BFD_RELOC_68K_RELATIVE, R_68K_RELATIVE }, | |
158 | { BFD_RELOC_CTOR, R_68K_32 }, | |
159 | { BFD_RELOC_VTABLE_INHERIT, R_68K_GNU_VTINHERIT }, | |
160 | { BFD_RELOC_VTABLE_ENTRY, R_68K_GNU_VTENTRY }, | |
161 | }; | |
162 | ||
163 | static reloc_howto_type * | |
164 | reloc_type_lookup (abfd, code) | |
121089cb | 165 | bfd *abfd ATTRIBUTE_UNUSED; |
252b5132 RH |
166 | bfd_reloc_code_real_type code; |
167 | { | |
168 | unsigned int i; | |
169 | for (i = 0; i < sizeof (reloc_map) / sizeof (reloc_map[0]); i++) | |
170 | { | |
171 | if (reloc_map[i].bfd_val == code) | |
172 | return &howto_table[reloc_map[i].elf_val]; | |
173 | } | |
174 | return 0; | |
175 | } | |
176 | ||
157090f7 AM |
177 | static reloc_howto_type * |
178 | reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, const char *r_name) | |
179 | { | |
180 | unsigned int i; | |
181 | ||
182 | for (i = 0; i < sizeof (howto_table) / sizeof (howto_table[0]); i++) | |
183 | if (howto_table[i].name != NULL | |
184 | && strcasecmp (howto_table[i].name, r_name) == 0) | |
185 | return &howto_table[i]; | |
186 | ||
187 | return NULL; | |
188 | } | |
189 | ||
252b5132 | 190 | #define bfd_elf32_bfd_reloc_type_lookup reloc_type_lookup |
157090f7 | 191 | #define bfd_elf32_bfd_reloc_name_lookup reloc_name_lookup |
252b5132 | 192 | #define ELF_ARCH bfd_arch_m68k |
252b5132 RH |
193 | \f |
194 | /* Functions for the m68k ELF linker. */ | |
195 | ||
196 | /* The name of the dynamic interpreter. This is put in the .interp | |
197 | section. */ | |
198 | ||
199 | #define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1" | |
200 | ||
cc3e26be RS |
201 | /* Describes one of the various PLT styles. */ |
202 | ||
203 | struct elf_m68k_plt_info | |
204 | { | |
205 | /* The size of each PLT entry. */ | |
206 | bfd_vma size; | |
207 | ||
208 | /* The template for the first PLT entry. */ | |
209 | const bfd_byte *plt0_entry; | |
210 | ||
211 | /* Offsets of fields in PLT0_ENTRY that require R_68K_PC32 relocations. | |
212 | The comments by each member indicate the value that the relocation | |
213 | is against. */ | |
214 | struct { | |
215 | unsigned int got4; /* .got + 4 */ | |
216 | unsigned int got8; /* .got + 8 */ | |
217 | } plt0_relocs; | |
218 | ||
219 | /* The template for a symbol's PLT entry. */ | |
220 | const bfd_byte *symbol_entry; | |
221 | ||
222 | /* Offsets of fields in SYMBOL_ENTRY that require R_68K_PC32 relocations. | |
223 | The comments by each member indicate the value that the relocation | |
224 | is against. */ | |
225 | struct { | |
226 | unsigned int got; /* the symbol's .got.plt entry */ | |
227 | unsigned int plt; /* .plt */ | |
228 | } symbol_relocs; | |
229 | ||
230 | /* The offset of the resolver stub from the start of SYMBOL_ENTRY. | |
231 | The stub starts with "move.l #relocoffset,%d0". */ | |
232 | bfd_vma symbol_resolve_entry; | |
233 | }; | |
234 | ||
252b5132 RH |
235 | /* The size in bytes of an entry in the procedure linkage table. */ |
236 | ||
237 | #define PLT_ENTRY_SIZE 20 | |
238 | ||
239 | /* The first entry in a procedure linkage table looks like this. See | |
240 | the SVR4 ABI m68k supplement to see how this works. */ | |
241 | ||
242 | static const bfd_byte elf_m68k_plt0_entry[PLT_ENTRY_SIZE] = | |
243 | { | |
244 | 0x2f, 0x3b, 0x01, 0x70, /* move.l (%pc,addr),-(%sp) */ | |
cc3e26be | 245 | 0, 0, 0, 2, /* + (.got + 4) - . */ |
252b5132 | 246 | 0x4e, 0xfb, 0x01, 0x71, /* jmp ([%pc,addr]) */ |
cc3e26be | 247 | 0, 0, 0, 2, /* + (.got + 8) - . */ |
252b5132 RH |
248 | 0, 0, 0, 0 /* pad out to 20 bytes. */ |
249 | }; | |
250 | ||
251 | /* Subsequent entries in a procedure linkage table look like this. */ | |
252 | ||
253 | static const bfd_byte elf_m68k_plt_entry[PLT_ENTRY_SIZE] = | |
254 | { | |
255 | 0x4e, 0xfb, 0x01, 0x71, /* jmp ([%pc,symbol@GOTPC]) */ | |
cc3e26be | 256 | 0, 0, 0, 2, /* + (.got.plt entry) - . */ |
252b5132 | 257 | 0x2f, 0x3c, /* move.l #offset,-(%sp) */ |
cc3e26be | 258 | 0, 0, 0, 0, /* + reloc index */ |
252b5132 | 259 | 0x60, 0xff, /* bra.l .plt */ |
cc3e26be | 260 | 0, 0, 0, 0 /* + .plt - . */ |
252b5132 RH |
261 | }; |
262 | ||
cc3e26be RS |
263 | static const struct elf_m68k_plt_info elf_m68k_plt_info = { |
264 | PLT_ENTRY_SIZE, | |
265 | elf_m68k_plt0_entry, { 4, 12 }, | |
266 | elf_m68k_plt_entry, { 4, 16 }, 8 | |
267 | }; | |
238d258f | 268 | |
cc3e26be | 269 | #define ISAB_PLT_ENTRY_SIZE 24 |
238d258f | 270 | |
cc3e26be | 271 | static const bfd_byte elf_isab_plt0_entry[ISAB_PLT_ENTRY_SIZE] = |
238d258f | 272 | { |
cc3e26be RS |
273 | 0x20, 0x3c, /* move.l #offset,%d0 */ |
274 | 0, 0, 0, 0, /* + (.got + 4) - . */ | |
275 | 0x2f, 0x3b, 0x08, 0xfa, /* move.l (-6,%pc,%d0:l),-(%sp) */ | |
276 | 0x20, 0x3c, /* move.l #offset,%d0 */ | |
277 | 0, 0, 0, 0, /* + (.got + 8) - . */ | |
278 | 0x20, 0x7b, 0x08, 0xfa, /* move.l (-6,%pc,%d0:l), %a0 */ | |
238d258f NC |
279 | 0x4e, 0xd0, /* jmp (%a0) */ |
280 | 0x4e, 0x71 /* nop */ | |
281 | }; | |
282 | ||
283 | /* Subsequent entries in a procedure linkage table look like this. */ | |
284 | ||
cc3e26be | 285 | static const bfd_byte elf_isab_plt_entry[ISAB_PLT_ENTRY_SIZE] = |
238d258f | 286 | { |
cc3e26be RS |
287 | 0x20, 0x3c, /* move.l #offset,%d0 */ |
288 | 0, 0, 0, 0, /* + (.got.plt entry) - . */ | |
289 | 0x20, 0x7b, 0x08, 0xfa, /* move.l (-6,%pc,%d0:l), %a0 */ | |
238d258f NC |
290 | 0x4e, 0xd0, /* jmp (%a0) */ |
291 | 0x2f, 0x3c, /* move.l #offset,-(%sp) */ | |
cc3e26be | 292 | 0, 0, 0, 0, /* + reloc index */ |
238d258f | 293 | 0x60, 0xff, /* bra.l .plt */ |
cc3e26be | 294 | 0, 0, 0, 0 /* + .plt - . */ |
238d258f NC |
295 | }; |
296 | ||
cc3e26be RS |
297 | static const struct elf_m68k_plt_info elf_isab_plt_info = { |
298 | ISAB_PLT_ENTRY_SIZE, | |
299 | elf_isab_plt0_entry, { 2, 12 }, | |
300 | elf_isab_plt_entry, { 2, 20 }, 12 | |
301 | }; | |
9e1281c7 | 302 | |
cc3e26be | 303 | #define CPU32_PLT_ENTRY_SIZE 24 |
9e1281c7 | 304 | /* Procedure linkage table entries for the cpu32 */ |
cc3e26be | 305 | static const bfd_byte elf_cpu32_plt0_entry[CPU32_PLT_ENTRY_SIZE] = |
9e1281c7 | 306 | { |
6091b433 | 307 | 0x2f, 0x3b, 0x01, 0x70, /* move.l (%pc,addr),-(%sp) */ |
cc3e26be | 308 | 0, 0, 0, 2, /* + (.got + 4) - . */ |
6091b433 | 309 | 0x22, 0x7b, 0x01, 0x70, /* moveal %pc@(0xc), %a1 */ |
cc3e26be | 310 | 0, 0, 0, 2, /* + (.got + 8) - . */ |
6091b433 | 311 | 0x4e, 0xd1, /* jmp %a1@ */ |
9e1281c7 CM |
312 | 0, 0, 0, 0, /* pad out to 24 bytes. */ |
313 | 0, 0 | |
314 | }; | |
315 | ||
cc3e26be | 316 | static const bfd_byte elf_cpu32_plt_entry[CPU32_PLT_ENTRY_SIZE] = |
9e1281c7 | 317 | { |
1ca42bad | 318 | 0x22, 0x7b, 0x01, 0x70, /* moveal %pc@(0xc), %a1 */ |
cc3e26be | 319 | 0, 0, 0, 2, /* + (.got.plt entry) - . */ |
1ca42bad | 320 | 0x4e, 0xd1, /* jmp %a1@ */ |
9e1281c7 | 321 | 0x2f, 0x3c, /* move.l #offset,-(%sp) */ |
cc3e26be | 322 | 0, 0, 0, 0, /* + reloc index */ |
9e1281c7 | 323 | 0x60, 0xff, /* bra.l .plt */ |
cc3e26be | 324 | 0, 0, 0, 0, /* + .plt - . */ |
9e1281c7 CM |
325 | 0, 0 |
326 | }; | |
327 | ||
cc3e26be RS |
328 | static const struct elf_m68k_plt_info elf_cpu32_plt_info = { |
329 | CPU32_PLT_ENTRY_SIZE, | |
330 | elf_cpu32_plt0_entry, { 4, 12 }, | |
331 | elf_cpu32_plt_entry, { 4, 18 }, 10 | |
332 | }; | |
333 | ||
252b5132 RH |
334 | /* The m68k linker needs to keep track of the number of relocs that it |
335 | decides to copy in check_relocs for each symbol. This is so that it | |
336 | can discard PC relative relocs if it doesn't need them when linking | |
337 | with -Bsymbolic. We store the information in a field extending the | |
338 | regular ELF linker hash table. */ | |
339 | ||
340 | /* This structure keeps track of the number of PC relative relocs we have | |
341 | copied for a given symbol. */ | |
342 | ||
343 | struct elf_m68k_pcrel_relocs_copied | |
344 | { | |
345 | /* Next section. */ | |
346 | struct elf_m68k_pcrel_relocs_copied *next; | |
347 | /* A section in dynobj. */ | |
348 | asection *section; | |
349 | /* Number of relocs copied in this section. */ | |
350 | bfd_size_type count; | |
351 | }; | |
352 | ||
353 | /* m68k ELF linker hash entry. */ | |
354 | ||
355 | struct elf_m68k_link_hash_entry | |
356 | { | |
357 | struct elf_link_hash_entry root; | |
358 | ||
359 | /* Number of PC relative relocs copied for this symbol. */ | |
360 | struct elf_m68k_pcrel_relocs_copied *pcrel_relocs_copied; | |
361 | }; | |
362 | ||
0cca5f05 AS |
363 | #define elf_m68k_hash_entry(ent) ((struct elf_m68k_link_hash_entry *) (ent)) |
364 | ||
252b5132 RH |
365 | /* m68k ELF linker hash table. */ |
366 | ||
367 | struct elf_m68k_link_hash_table | |
368 | { | |
369 | struct elf_link_hash_table root; | |
b6152c34 AS |
370 | |
371 | /* Small local sym to section mapping cache. */ | |
372 | struct sym_sec_cache sym_sec; | |
cc3e26be RS |
373 | |
374 | /* The PLT format used by this link, or NULL if the format has not | |
375 | yet been chosen. */ | |
376 | const struct elf_m68k_plt_info *plt_info; | |
252b5132 RH |
377 | }; |
378 | ||
252b5132 RH |
379 | /* Get the m68k ELF linker hash table from a link_info structure. */ |
380 | ||
381 | #define elf_m68k_hash_table(p) \ | |
382 | ((struct elf_m68k_link_hash_table *) (p)->hash) | |
383 | ||
384 | /* Create an entry in an m68k ELF linker hash table. */ | |
385 | ||
386 | static struct bfd_hash_entry * | |
387 | elf_m68k_link_hash_newfunc (entry, table, string) | |
388 | struct bfd_hash_entry *entry; | |
389 | struct bfd_hash_table *table; | |
390 | const char *string; | |
391 | { | |
0cca5f05 | 392 | struct bfd_hash_entry *ret = entry; |
252b5132 RH |
393 | |
394 | /* Allocate the structure if it has not already been allocated by a | |
395 | subclass. */ | |
0cca5f05 AS |
396 | if (ret == NULL) |
397 | ret = bfd_hash_allocate (table, | |
398 | sizeof (struct elf_m68k_link_hash_entry)); | |
399 | if (ret == NULL) | |
400 | return ret; | |
252b5132 RH |
401 | |
402 | /* Call the allocation method of the superclass. */ | |
0cca5f05 AS |
403 | ret = _bfd_elf_link_hash_newfunc (ret, table, string); |
404 | if (ret != NULL) | |
405 | elf_m68k_hash_entry (ret)->pcrel_relocs_copied = NULL; | |
252b5132 | 406 | |
0cca5f05 | 407 | return ret; |
252b5132 RH |
408 | } |
409 | ||
410 | /* Create an m68k ELF linker hash table. */ | |
411 | ||
412 | static struct bfd_link_hash_table * | |
413 | elf_m68k_link_hash_table_create (abfd) | |
414 | bfd *abfd; | |
415 | { | |
416 | struct elf_m68k_link_hash_table *ret; | |
dc810e39 | 417 | bfd_size_type amt = sizeof (struct elf_m68k_link_hash_table); |
252b5132 | 418 | |
e2d34d7d | 419 | ret = (struct elf_m68k_link_hash_table *) bfd_malloc (amt); |
252b5132 RH |
420 | if (ret == (struct elf_m68k_link_hash_table *) NULL) |
421 | return NULL; | |
422 | ||
66eb6687 AM |
423 | if (!_bfd_elf_link_hash_table_init (&ret->root, abfd, |
424 | elf_m68k_link_hash_newfunc, | |
425 | sizeof (struct elf_m68k_link_hash_entry))) | |
252b5132 | 426 | { |
e2d34d7d | 427 | free (ret); |
252b5132 RH |
428 | return NULL; |
429 | } | |
430 | ||
b6152c34 | 431 | ret->sym_sec.abfd = NULL; |
cc3e26be | 432 | ret->plt_info = NULL; |
b6152c34 | 433 | |
252b5132 RH |
434 | return &ret->root.root; |
435 | } | |
436 | ||
266abb8f NS |
437 | /* Set the right machine number. */ |
438 | ||
439 | static bfd_boolean | |
440 | elf32_m68k_object_p (bfd *abfd) | |
441 | { | |
442 | unsigned int mach = 0; | |
443 | unsigned features = 0; | |
444 | flagword eflags = elf_elfheader (abfd)->e_flags; | |
445 | ||
425c6cb0 | 446 | if ((eflags & EF_M68K_ARCH_MASK) == EF_M68K_M68000) |
266abb8f | 447 | features |= m68000; |
425c6cb0 | 448 | else if ((eflags & EF_M68K_ARCH_MASK) == EF_M68K_CPU32) |
3bdcfdf4 KH |
449 | features |= cpu32; |
450 | else if ((eflags & EF_M68K_ARCH_MASK) == EF_M68K_FIDO) | |
451 | features |= fido_a; | |
425c6cb0 | 452 | else |
266abb8f | 453 | { |
c694fd50 | 454 | switch (eflags & EF_M68K_CF_ISA_MASK) |
266abb8f | 455 | { |
c694fd50 | 456 | case EF_M68K_CF_ISA_A_NODIV: |
266abb8f NS |
457 | features |= mcfisa_a; |
458 | break; | |
c694fd50 | 459 | case EF_M68K_CF_ISA_A: |
0b2e31dc NS |
460 | features |= mcfisa_a|mcfhwdiv; |
461 | break; | |
c694fd50 | 462 | case EF_M68K_CF_ISA_A_PLUS: |
0b2e31dc NS |
463 | features |= mcfisa_a|mcfisa_aa|mcfhwdiv|mcfusp; |
464 | break; | |
c694fd50 | 465 | case EF_M68K_CF_ISA_B_NOUSP: |
0b2e31dc NS |
466 | features |= mcfisa_a|mcfisa_b|mcfhwdiv; |
467 | break; | |
c694fd50 | 468 | case EF_M68K_CF_ISA_B: |
0b2e31dc NS |
469 | features |= mcfisa_a|mcfisa_b|mcfhwdiv|mcfusp; |
470 | break; | |
266abb8f | 471 | } |
c694fd50 | 472 | switch (eflags & EF_M68K_CF_MAC_MASK) |
266abb8f | 473 | { |
c694fd50 | 474 | case EF_M68K_CF_MAC: |
266abb8f NS |
475 | features |= mcfmac; |
476 | break; | |
c694fd50 | 477 | case EF_M68K_CF_EMAC: |
266abb8f NS |
478 | features |= mcfemac; |
479 | break; | |
480 | } | |
c694fd50 | 481 | if (eflags & EF_M68K_CF_FLOAT) |
266abb8f NS |
482 | features |= cfloat; |
483 | } | |
484 | ||
485 | mach = bfd_m68k_features_to_mach (features); | |
486 | bfd_default_set_arch_mach (abfd, bfd_arch_m68k, mach); | |
487 | ||
488 | return TRUE; | |
489 | } | |
490 | ||
ae9a127f | 491 | /* Keep m68k-specific flags in the ELF header. */ |
b34976b6 | 492 | static bfd_boolean |
9e1281c7 CM |
493 | elf32_m68k_set_private_flags (abfd, flags) |
494 | bfd *abfd; | |
495 | flagword flags; | |
496 | { | |
497 | elf_elfheader (abfd)->e_flags = flags; | |
b34976b6 AM |
498 | elf_flags_init (abfd) = TRUE; |
499 | return TRUE; | |
9e1281c7 CM |
500 | } |
501 | ||
9e1281c7 CM |
502 | /* Merge backend specific data from an object file to the output |
503 | object file when linking. */ | |
b34976b6 | 504 | static bfd_boolean |
9e1281c7 CM |
505 | elf32_m68k_merge_private_bfd_data (ibfd, obfd) |
506 | bfd *ibfd; | |
507 | bfd *obfd; | |
508 | { | |
509 | flagword out_flags; | |
510 | flagword in_flags; | |
a9d34880 RS |
511 | flagword out_isa; |
512 | flagword in_isa; | |
513 | const bfd_arch_info_type *arch_info; | |
266abb8f | 514 | |
9e1281c7 CM |
515 | if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour |
516 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) | |
266abb8f NS |
517 | return FALSE; |
518 | ||
a9d34880 RS |
519 | /* Get the merged machine. This checks for incompatibility between |
520 | Coldfire & non-Coldfire flags, incompability between different | |
521 | Coldfire ISAs, and incompability between different MAC types. */ | |
522 | arch_info = bfd_arch_get_compatible (ibfd, obfd, FALSE); | |
523 | if (!arch_info) | |
524 | return FALSE; | |
9e1281c7 | 525 | |
a9d34880 RS |
526 | bfd_set_arch_mach (obfd, bfd_arch_m68k, arch_info->mach); |
527 | ||
528 | in_flags = elf_elfheader (ibfd)->e_flags; | |
9e1281c7 CM |
529 | if (!elf_flags_init (obfd)) |
530 | { | |
b34976b6 | 531 | elf_flags_init (obfd) = TRUE; |
266abb8f NS |
532 | out_flags = in_flags; |
533 | } | |
534 | else | |
535 | { | |
a9d34880 | 536 | out_flags = elf_elfheader (obfd)->e_flags; |
425c6cb0 KH |
537 | unsigned int variant_mask; |
538 | ||
539 | if ((in_flags & EF_M68K_ARCH_MASK) == EF_M68K_M68000) | |
540 | variant_mask = 0; | |
541 | else if ((in_flags & EF_M68K_ARCH_MASK) == EF_M68K_CPU32) | |
3bdcfdf4 KH |
542 | variant_mask = 0; |
543 | else if ((in_flags & EF_M68K_ARCH_MASK) == EF_M68K_FIDO) | |
544 | variant_mask = 0; | |
425c6cb0 KH |
545 | else |
546 | variant_mask = EF_M68K_CF_ISA_MASK; | |
547 | ||
548 | in_isa = (in_flags & variant_mask); | |
549 | out_isa = (out_flags & variant_mask); | |
a9d34880 RS |
550 | if (in_isa > out_isa) |
551 | out_flags ^= in_isa ^ out_isa; | |
3bdcfdf4 KH |
552 | if (((in_flags & EF_M68K_ARCH_MASK) == EF_M68K_CPU32 |
553 | && (out_flags & EF_M68K_ARCH_MASK) == EF_M68K_FIDO) | |
554 | || ((in_flags & EF_M68K_ARCH_MASK) == EF_M68K_FIDO | |
555 | && (out_flags & EF_M68K_ARCH_MASK) == EF_M68K_CPU32)) | |
556 | out_flags = EF_M68K_FIDO; | |
557 | else | |
a9d34880 | 558 | out_flags |= in_flags ^ in_isa; |
9e1281c7 | 559 | } |
266abb8f | 560 | elf_elfheader (obfd)->e_flags = out_flags; |
9e1281c7 | 561 | |
b34976b6 | 562 | return TRUE; |
9e1281c7 CM |
563 | } |
564 | ||
ae9a127f | 565 | /* Display the flags field. */ |
b34976b6 | 566 | static bfd_boolean |
9e1281c7 CM |
567 | elf32_m68k_print_private_bfd_data (abfd, ptr) |
568 | bfd *abfd; | |
569 | PTR ptr; | |
570 | { | |
571 | FILE *file = (FILE *) ptr; | |
266abb8f | 572 | flagword eflags = elf_elfheader (abfd)->e_flags; |
9e1281c7 CM |
573 | |
574 | BFD_ASSERT (abfd != NULL && ptr != NULL); | |
575 | ||
576 | /* Print normal ELF private data. */ | |
577 | _bfd_elf_print_private_bfd_data (abfd, ptr); | |
578 | ||
579 | /* Ignore init flag - it may not be set, despite the flags field containing valid data. */ | |
580 | ||
581 | /* xgettext:c-format */ | |
517662d4 | 582 | fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags); |
9e1281c7 | 583 | |
425c6cb0 | 584 | if ((eflags & EF_M68K_ARCH_MASK) == EF_M68K_M68000) |
266abb8f | 585 | fprintf (file, " [m68000]"); |
425c6cb0 | 586 | else if ((eflags & EF_M68K_ARCH_MASK) == EF_M68K_CPU32) |
3bdcfdf4 KH |
587 | fprintf (file, " [cpu32]"); |
588 | else if ((eflags & EF_M68K_ARCH_MASK) == EF_M68K_FIDO) | |
589 | fprintf (file, " [fido]"); | |
425c6cb0 | 590 | else |
266abb8f | 591 | { |
425c6cb0 KH |
592 | if ((eflags & EF_M68K_ARCH_MASK) == EF_M68K_CFV4E) |
593 | fprintf (file, " [cfv4e]"); | |
594 | ||
595 | if (eflags & EF_M68K_CF_ISA_MASK) | |
266abb8f | 596 | { |
425c6cb0 KH |
597 | char const *isa = _("unknown"); |
598 | char const *mac = _("unknown"); | |
599 | char const *additional = ""; | |
600 | ||
601 | switch (eflags & EF_M68K_CF_ISA_MASK) | |
602 | { | |
603 | case EF_M68K_CF_ISA_A_NODIV: | |
604 | isa = "A"; | |
605 | additional = " [nodiv]"; | |
606 | break; | |
607 | case EF_M68K_CF_ISA_A: | |
608 | isa = "A"; | |
609 | break; | |
610 | case EF_M68K_CF_ISA_A_PLUS: | |
611 | isa = "A+"; | |
612 | break; | |
613 | case EF_M68K_CF_ISA_B_NOUSP: | |
614 | isa = "B"; | |
615 | additional = " [nousp]"; | |
616 | break; | |
617 | case EF_M68K_CF_ISA_B: | |
618 | isa = "B"; | |
619 | break; | |
620 | } | |
621 | fprintf (file, " [isa %s]%s", isa, additional); | |
622 | if (eflags & EF_M68K_CF_FLOAT) | |
623 | fprintf (file, " [float]"); | |
624 | switch (eflags & EF_M68K_CF_MAC_MASK) | |
625 | { | |
626 | case 0: | |
627 | mac = NULL; | |
628 | break; | |
629 | case EF_M68K_CF_MAC: | |
630 | mac = "mac"; | |
631 | break; | |
632 | case EF_M68K_CF_EMAC: | |
633 | mac = "emac"; | |
634 | break; | |
635 | } | |
636 | if (mac) | |
637 | fprintf (file, " [%s]", mac); | |
266abb8f | 638 | } |
266abb8f NS |
639 | } |
640 | ||
9e1281c7 CM |
641 | fputc ('\n', file); |
642 | ||
b34976b6 | 643 | return TRUE; |
9e1281c7 | 644 | } |
252b5132 RH |
645 | /* Look through the relocs for a section during the first phase, and |
646 | allocate space in the global offset table or procedure linkage | |
647 | table. */ | |
648 | ||
b34976b6 | 649 | static bfd_boolean |
252b5132 RH |
650 | elf_m68k_check_relocs (abfd, info, sec, relocs) |
651 | bfd *abfd; | |
652 | struct bfd_link_info *info; | |
653 | asection *sec; | |
654 | const Elf_Internal_Rela *relocs; | |
655 | { | |
656 | bfd *dynobj; | |
657 | Elf_Internal_Shdr *symtab_hdr; | |
658 | struct elf_link_hash_entry **sym_hashes; | |
659 | bfd_signed_vma *local_got_refcounts; | |
660 | const Elf_Internal_Rela *rel; | |
661 | const Elf_Internal_Rela *rel_end; | |
662 | asection *sgot; | |
663 | asection *srelgot; | |
664 | asection *sreloc; | |
665 | ||
1049f94e | 666 | if (info->relocatable) |
b34976b6 | 667 | return TRUE; |
252b5132 RH |
668 | |
669 | dynobj = elf_hash_table (info)->dynobj; | |
670 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
671 | sym_hashes = elf_sym_hashes (abfd); | |
672 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
673 | ||
674 | sgot = NULL; | |
675 | srelgot = NULL; | |
676 | sreloc = NULL; | |
677 | ||
678 | rel_end = relocs + sec->reloc_count; | |
679 | for (rel = relocs; rel < rel_end; rel++) | |
680 | { | |
681 | unsigned long r_symndx; | |
682 | struct elf_link_hash_entry *h; | |
683 | ||
684 | r_symndx = ELF32_R_SYM (rel->r_info); | |
685 | ||
686 | if (r_symndx < symtab_hdr->sh_info) | |
687 | h = NULL; | |
688 | else | |
973a3492 L |
689 | { |
690 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
691 | while (h->root.type == bfd_link_hash_indirect | |
692 | || h->root.type == bfd_link_hash_warning) | |
693 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
694 | } | |
252b5132 RH |
695 | |
696 | switch (ELF32_R_TYPE (rel->r_info)) | |
697 | { | |
698 | case R_68K_GOT8: | |
699 | case R_68K_GOT16: | |
700 | case R_68K_GOT32: | |
701 | if (h != NULL | |
702 | && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) | |
703 | break; | |
704 | /* Fall through. */ | |
705 | case R_68K_GOT8O: | |
706 | case R_68K_GOT16O: | |
707 | case R_68K_GOT32O: | |
708 | /* This symbol requires a global offset table entry. */ | |
709 | ||
710 | if (dynobj == NULL) | |
711 | { | |
712 | /* Create the .got section. */ | |
713 | elf_hash_table (info)->dynobj = dynobj = abfd; | |
714 | if (!_bfd_elf_create_got_section (dynobj, info)) | |
b34976b6 | 715 | return FALSE; |
252b5132 RH |
716 | } |
717 | ||
718 | if (sgot == NULL) | |
719 | { | |
720 | sgot = bfd_get_section_by_name (dynobj, ".got"); | |
721 | BFD_ASSERT (sgot != NULL); | |
722 | } | |
723 | ||
724 | if (srelgot == NULL | |
725 | && (h != NULL || info->shared)) | |
726 | { | |
727 | srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); | |
728 | if (srelgot == NULL) | |
729 | { | |
3496cb2a L |
730 | srelgot = bfd_make_section_with_flags (dynobj, |
731 | ".rela.got", | |
732 | (SEC_ALLOC | |
733 | | SEC_LOAD | |
734 | | SEC_HAS_CONTENTS | |
735 | | SEC_IN_MEMORY | |
736 | | SEC_LINKER_CREATED | |
737 | | SEC_READONLY)); | |
252b5132 | 738 | if (srelgot == NULL |
252b5132 | 739 | || !bfd_set_section_alignment (dynobj, srelgot, 2)) |
b34976b6 | 740 | return FALSE; |
252b5132 RH |
741 | } |
742 | } | |
743 | ||
744 | if (h != NULL) | |
745 | { | |
51b64d56 | 746 | if (h->got.refcount == 0) |
252b5132 | 747 | { |
252b5132 | 748 | /* Make sure this symbol is output as a dynamic symbol. */ |
b6152c34 | 749 | if (h->dynindx == -1 |
f5385ebf | 750 | && !h->forced_local) |
252b5132 | 751 | { |
c152c796 | 752 | if (!bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 753 | return FALSE; |
252b5132 RH |
754 | } |
755 | ||
756 | /* Allocate space in the .got section. */ | |
eea6121a | 757 | sgot->size += 4; |
252b5132 | 758 | /* Allocate relocation space. */ |
eea6121a | 759 | srelgot->size += sizeof (Elf32_External_Rela); |
252b5132 | 760 | } |
51b64d56 | 761 | h->got.refcount++; |
252b5132 RH |
762 | } |
763 | else | |
764 | { | |
765 | /* This is a global offset table entry for a local symbol. */ | |
766 | if (local_got_refcounts == NULL) | |
767 | { | |
dc810e39 | 768 | bfd_size_type size; |
252b5132 | 769 | |
dc810e39 AM |
770 | size = symtab_hdr->sh_info; |
771 | size *= sizeof (bfd_signed_vma); | |
252b5132 | 772 | local_got_refcounts = ((bfd_signed_vma *) |
51b64d56 | 773 | bfd_zalloc (abfd, size)); |
252b5132 | 774 | if (local_got_refcounts == NULL) |
b34976b6 | 775 | return FALSE; |
252b5132 | 776 | elf_local_got_refcounts (abfd) = local_got_refcounts; |
252b5132 | 777 | } |
51b64d56 | 778 | if (local_got_refcounts[r_symndx] == 0) |
252b5132 | 779 | { |
eea6121a | 780 | sgot->size += 4; |
252b5132 RH |
781 | if (info->shared) |
782 | { | |
783 | /* If we are generating a shared object, we need to | |
784 | output a R_68K_RELATIVE reloc so that the dynamic | |
785 | linker can adjust this GOT entry. */ | |
eea6121a | 786 | srelgot->size += sizeof (Elf32_External_Rela); |
252b5132 RH |
787 | } |
788 | } | |
51b64d56 | 789 | local_got_refcounts[r_symndx]++; |
252b5132 RH |
790 | } |
791 | break; | |
792 | ||
793 | case R_68K_PLT8: | |
794 | case R_68K_PLT16: | |
795 | case R_68K_PLT32: | |
796 | /* This symbol requires a procedure linkage table entry. We | |
797 | actually build the entry in adjust_dynamic_symbol, | |
798 | because this might be a case of linking PIC code which is | |
799 | never referenced by a dynamic object, in which case we | |
800 | don't need to generate a procedure linkage table entry | |
801 | after all. */ | |
802 | ||
803 | /* If this is a local symbol, we resolve it directly without | |
804 | creating a procedure linkage table entry. */ | |
805 | if (h == NULL) | |
806 | continue; | |
807 | ||
f5385ebf | 808 | h->needs_plt = 1; |
51b64d56 | 809 | h->plt.refcount++; |
252b5132 RH |
810 | break; |
811 | ||
812 | case R_68K_PLT8O: | |
813 | case R_68K_PLT16O: | |
814 | case R_68K_PLT32O: | |
815 | /* This symbol requires a procedure linkage table entry. */ | |
816 | ||
817 | if (h == NULL) | |
818 | { | |
819 | /* It does not make sense to have this relocation for a | |
820 | local symbol. FIXME: does it? How to handle it if | |
821 | it does make sense? */ | |
822 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 823 | return FALSE; |
252b5132 RH |
824 | } |
825 | ||
826 | /* Make sure this symbol is output as a dynamic symbol. */ | |
b6152c34 | 827 | if (h->dynindx == -1 |
f5385ebf | 828 | && !h->forced_local) |
252b5132 | 829 | { |
c152c796 | 830 | if (!bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 831 | return FALSE; |
252b5132 RH |
832 | } |
833 | ||
f5385ebf | 834 | h->needs_plt = 1; |
51b64d56 | 835 | h->plt.refcount++; |
252b5132 RH |
836 | break; |
837 | ||
838 | case R_68K_PC8: | |
839 | case R_68K_PC16: | |
840 | case R_68K_PC32: | |
841 | /* If we are creating a shared library and this is not a local | |
842 | symbol, we need to copy the reloc into the shared library. | |
843 | However when linking with -Bsymbolic and this is a global | |
844 | symbol which is defined in an object we are including in the | |
845 | link (i.e., DEF_REGULAR is set), then we can resolve the | |
846 | reloc directly. At this point we have not seen all the input | |
847 | files, so it is possible that DEF_REGULAR is not set now but | |
848 | will be set later (it is never cleared). We account for that | |
849 | possibility below by storing information in the | |
850 | pcrel_relocs_copied field of the hash table entry. */ | |
851 | if (!(info->shared | |
852 | && (sec->flags & SEC_ALLOC) != 0 | |
853 | && h != NULL | |
854 | && (!info->symbolic | |
b6152c34 | 855 | || h->root.type == bfd_link_hash_defweak |
f5385ebf | 856 | || !h->def_regular))) |
252b5132 RH |
857 | { |
858 | if (h != NULL) | |
859 | { | |
860 | /* Make sure a plt entry is created for this symbol if | |
861 | it turns out to be a function defined by a dynamic | |
862 | object. */ | |
51b64d56 | 863 | h->plt.refcount++; |
252b5132 RH |
864 | } |
865 | break; | |
866 | } | |
867 | /* Fall through. */ | |
868 | case R_68K_8: | |
869 | case R_68K_16: | |
870 | case R_68K_32: | |
871 | if (h != NULL) | |
872 | { | |
873 | /* Make sure a plt entry is created for this symbol if it | |
874 | turns out to be a function defined by a dynamic object. */ | |
51b64d56 | 875 | h->plt.refcount++; |
252b5132 RH |
876 | } |
877 | ||
878 | /* If we are creating a shared library, we need to copy the | |
879 | reloc into the shared library. */ | |
880 | if (info->shared | |
881 | && (sec->flags & SEC_ALLOC) != 0) | |
882 | { | |
883 | /* When creating a shared object, we must copy these | |
884 | reloc types into the output file. We create a reloc | |
885 | section in dynobj and make room for this reloc. */ | |
886 | if (sreloc == NULL) | |
887 | { | |
888 | const char *name; | |
889 | ||
890 | name = (bfd_elf_string_from_elf_section | |
891 | (abfd, | |
892 | elf_elfheader (abfd)->e_shstrndx, | |
893 | elf_section_data (sec)->rel_hdr.sh_name)); | |
894 | if (name == NULL) | |
b34976b6 | 895 | return FALSE; |
252b5132 | 896 | |
0112cd26 | 897 | BFD_ASSERT (CONST_STRNEQ (name, ".rela") |
252b5132 RH |
898 | && strcmp (bfd_get_section_name (abfd, sec), |
899 | name + 5) == 0); | |
900 | ||
901 | sreloc = bfd_get_section_by_name (dynobj, name); | |
902 | if (sreloc == NULL) | |
903 | { | |
3496cb2a L |
904 | sreloc = bfd_make_section_with_flags (dynobj, |
905 | name, | |
906 | (SEC_ALLOC | |
907 | | SEC_LOAD | |
908 | | SEC_HAS_CONTENTS | |
909 | | SEC_IN_MEMORY | |
910 | | SEC_LINKER_CREATED | |
911 | | SEC_READONLY)); | |
252b5132 | 912 | if (sreloc == NULL |
252b5132 | 913 | || !bfd_set_section_alignment (dynobj, sreloc, 2)) |
b34976b6 | 914 | return FALSE; |
252b5132 | 915 | } |
d2ff124f | 916 | elf_section_data (sec)->sreloc = sreloc; |
252b5132 RH |
917 | } |
918 | ||
3e829b4a AS |
919 | if (sec->flags & SEC_READONLY |
920 | /* Don't set DF_TEXTREL yet for PC relative | |
921 | relocations, they might be discarded later. */ | |
922 | && !(ELF32_R_TYPE (rel->r_info) == R_68K_PC8 | |
923 | || ELF32_R_TYPE (rel->r_info) == R_68K_PC16 | |
924 | || ELF32_R_TYPE (rel->r_info) == R_68K_PC32)) | |
925 | info->flags |= DF_TEXTREL; | |
926 | ||
eea6121a | 927 | sreloc->size += sizeof (Elf32_External_Rela); |
252b5132 | 928 | |
b6152c34 AS |
929 | /* We count the number of PC relative relocations we have |
930 | entered for this symbol, so that we can discard them | |
931 | again if, in the -Bsymbolic case, the symbol is later | |
932 | defined by a regular object, or, in the normal shared | |
933 | case, the symbol is forced to be local. Note that this | |
934 | function is only called if we are using an m68kelf linker | |
935 | hash table, which means that h is really a pointer to an | |
252b5132 | 936 | elf_m68k_link_hash_entry. */ |
b6152c34 AS |
937 | if (ELF32_R_TYPE (rel->r_info) == R_68K_PC8 |
938 | || ELF32_R_TYPE (rel->r_info) == R_68K_PC16 | |
939 | || ELF32_R_TYPE (rel->r_info) == R_68K_PC32) | |
252b5132 | 940 | { |
252b5132 | 941 | struct elf_m68k_pcrel_relocs_copied *p; |
b6152c34 AS |
942 | struct elf_m68k_pcrel_relocs_copied **head; |
943 | ||
944 | if (h != NULL) | |
945 | { | |
946 | struct elf_m68k_link_hash_entry *eh | |
0cca5f05 | 947 | = elf_m68k_hash_entry (h); |
b6152c34 AS |
948 | head = &eh->pcrel_relocs_copied; |
949 | } | |
950 | else | |
951 | { | |
952 | asection *s; | |
6edfbbad DJ |
953 | void *vpp; |
954 | ||
b6152c34 AS |
955 | s = (bfd_section_from_r_symndx |
956 | (abfd, &elf_m68k_hash_table (info)->sym_sec, | |
957 | sec, r_symndx)); | |
958 | if (s == NULL) | |
959 | return FALSE; | |
252b5132 | 960 | |
6edfbbad DJ |
961 | vpp = &elf_section_data (s)->local_dynrel; |
962 | head = (struct elf_m68k_pcrel_relocs_copied **) vpp; | |
b6152c34 | 963 | } |
252b5132 | 964 | |
b6152c34 | 965 | for (p = *head; p != NULL; p = p->next) |
252b5132 RH |
966 | if (p->section == sreloc) |
967 | break; | |
968 | ||
969 | if (p == NULL) | |
970 | { | |
971 | p = ((struct elf_m68k_pcrel_relocs_copied *) | |
dc810e39 | 972 | bfd_alloc (dynobj, (bfd_size_type) sizeof *p)); |
252b5132 | 973 | if (p == NULL) |
b34976b6 | 974 | return FALSE; |
b6152c34 AS |
975 | p->next = *head; |
976 | *head = p; | |
252b5132 RH |
977 | p->section = sreloc; |
978 | p->count = 0; | |
979 | } | |
980 | ||
981 | ++p->count; | |
982 | } | |
983 | } | |
984 | ||
985 | break; | |
986 | ||
987 | /* This relocation describes the C++ object vtable hierarchy. | |
988 | Reconstruct it for later use during GC. */ | |
989 | case R_68K_GNU_VTINHERIT: | |
c152c796 | 990 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
b34976b6 | 991 | return FALSE; |
252b5132 RH |
992 | break; |
993 | ||
994 | /* This relocation describes which C++ vtable entries are actually | |
995 | used. Record for later use during GC. */ | |
996 | case R_68K_GNU_VTENTRY: | |
c152c796 | 997 | if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) |
b34976b6 | 998 | return FALSE; |
252b5132 RH |
999 | break; |
1000 | ||
1001 | default: | |
1002 | break; | |
1003 | } | |
1004 | } | |
1005 | ||
b34976b6 | 1006 | return TRUE; |
252b5132 RH |
1007 | } |
1008 | ||
1009 | /* Return the section that should be marked against GC for a given | |
1010 | relocation. */ | |
1011 | ||
1012 | static asection * | |
07adf181 AM |
1013 | elf_m68k_gc_mark_hook (asection *sec, |
1014 | struct bfd_link_info *info, | |
1015 | Elf_Internal_Rela *rel, | |
1016 | struct elf_link_hash_entry *h, | |
1017 | Elf_Internal_Sym *sym) | |
252b5132 RH |
1018 | { |
1019 | if (h != NULL) | |
07adf181 AM |
1020 | switch (ELF32_R_TYPE (rel->r_info)) |
1021 | { | |
1022 | case R_68K_GNU_VTINHERIT: | |
1023 | case R_68K_GNU_VTENTRY: | |
1024 | return NULL; | |
1025 | } | |
1026 | ||
1027 | return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); | |
252b5132 RH |
1028 | } |
1029 | ||
1030 | /* Update the got entry reference counts for the section being removed. */ | |
1031 | ||
b34976b6 | 1032 | static bfd_boolean |
07adf181 AM |
1033 | elf_m68k_gc_sweep_hook (bfd *abfd, |
1034 | struct bfd_link_info *info, | |
1035 | asection *sec, | |
1036 | const Elf_Internal_Rela *relocs) | |
252b5132 RH |
1037 | { |
1038 | Elf_Internal_Shdr *symtab_hdr; | |
1039 | struct elf_link_hash_entry **sym_hashes; | |
1040 | bfd_signed_vma *local_got_refcounts; | |
1041 | const Elf_Internal_Rela *rel, *relend; | |
252b5132 | 1042 | bfd *dynobj; |
dd5724d5 AM |
1043 | asection *sgot; |
1044 | asection *srelgot; | |
252b5132 | 1045 | |
252b5132 | 1046 | dynobj = elf_hash_table (info)->dynobj; |
dd5724d5 | 1047 | if (dynobj == NULL) |
b34976b6 | 1048 | return TRUE; |
dd5724d5 | 1049 | |
4f075348 KH |
1050 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
1051 | sym_hashes = elf_sym_hashes (abfd); | |
1052 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
1053 | ||
dd5724d5 AM |
1054 | sgot = bfd_get_section_by_name (dynobj, ".got"); |
1055 | srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); | |
252b5132 RH |
1056 | |
1057 | relend = relocs + sec->reloc_count; | |
1058 | for (rel = relocs; rel < relend; rel++) | |
1059 | { | |
4f075348 | 1060 | unsigned long r_symndx; |
3eb128b2 AM |
1061 | struct elf_link_hash_entry *h = NULL; |
1062 | ||
1063 | r_symndx = ELF32_R_SYM (rel->r_info); | |
1064 | if (r_symndx >= symtab_hdr->sh_info) | |
1065 | { | |
1066 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
1067 | while (h->root.type == bfd_link_hash_indirect | |
1068 | || h->root.type == bfd_link_hash_warning) | |
1069 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1070 | } | |
4f075348 | 1071 | |
252b5132 RH |
1072 | switch (ELF32_R_TYPE (rel->r_info)) |
1073 | { | |
1074 | case R_68K_GOT8: | |
1075 | case R_68K_GOT16: | |
1076 | case R_68K_GOT32: | |
1077 | case R_68K_GOT8O: | |
1078 | case R_68K_GOT16O: | |
1079 | case R_68K_GOT32O: | |
3eb128b2 | 1080 | if (h != NULL) |
252b5132 | 1081 | { |
252b5132 RH |
1082 | if (h->got.refcount > 0) |
1083 | { | |
1084 | --h->got.refcount; | |
1085 | if (h->got.refcount == 0) | |
1086 | { | |
1087 | /* We don't need the .got entry any more. */ | |
eea6121a AM |
1088 | sgot->size -= 4; |
1089 | srelgot->size -= sizeof (Elf32_External_Rela); | |
252b5132 RH |
1090 | } |
1091 | } | |
1092 | } | |
dd5724d5 | 1093 | else if (local_got_refcounts != NULL) |
252b5132 RH |
1094 | { |
1095 | if (local_got_refcounts[r_symndx] > 0) | |
1096 | { | |
1097 | --local_got_refcounts[r_symndx]; | |
1098 | if (local_got_refcounts[r_symndx] == 0) | |
1099 | { | |
1100 | /* We don't need the .got entry any more. */ | |
eea6121a | 1101 | sgot->size -= 4; |
252b5132 | 1102 | if (info->shared) |
eea6121a | 1103 | srelgot->size -= sizeof (Elf32_External_Rela); |
252b5132 RH |
1104 | } |
1105 | } | |
1106 | } | |
1107 | break; | |
1108 | ||
1109 | case R_68K_PLT8: | |
1110 | case R_68K_PLT16: | |
1111 | case R_68K_PLT32: | |
1112 | case R_68K_PLT8O: | |
1113 | case R_68K_PLT16O: | |
1114 | case R_68K_PLT32O: | |
1115 | case R_68K_PC8: | |
1116 | case R_68K_PC16: | |
1117 | case R_68K_PC32: | |
1118 | case R_68K_8: | |
1119 | case R_68K_16: | |
1120 | case R_68K_32: | |
3eb128b2 | 1121 | if (h != NULL) |
252b5132 | 1122 | { |
252b5132 RH |
1123 | if (h->plt.refcount > 0) |
1124 | --h->plt.refcount; | |
1125 | } | |
1126 | break; | |
1127 | ||
1128 | default: | |
1129 | break; | |
1130 | } | |
1131 | } | |
1132 | ||
b34976b6 | 1133 | return TRUE; |
252b5132 | 1134 | } |
cc3e26be RS |
1135 | \f |
1136 | /* Return the type of PLT associated with OUTPUT_BFD. */ | |
1137 | ||
1138 | static const struct elf_m68k_plt_info * | |
1139 | elf_m68k_get_plt_info (bfd *output_bfd) | |
1140 | { | |
1141 | unsigned int features; | |
1142 | ||
1143 | features = bfd_m68k_mach_to_features (bfd_get_mach (output_bfd)); | |
1144 | if (features & cpu32) | |
1145 | return &elf_cpu32_plt_info; | |
1146 | if (features & mcfisa_b) | |
1147 | return &elf_isab_plt_info; | |
1148 | return &elf_m68k_plt_info; | |
1149 | } | |
1150 | ||
1151 | /* This function is called after all the input files have been read, | |
1152 | and the input sections have been assigned to output sections. | |
1153 | It's a convenient place to determine the PLT style. */ | |
1154 | ||
1155 | static bfd_boolean | |
1156 | elf_m68k_always_size_sections (bfd *output_bfd, struct bfd_link_info *info) | |
1157 | { | |
1158 | elf_m68k_hash_table (info)->plt_info = elf_m68k_get_plt_info (output_bfd); | |
1159 | return TRUE; | |
1160 | } | |
252b5132 | 1161 | |
252b5132 RH |
1162 | /* Adjust a symbol defined by a dynamic object and referenced by a |
1163 | regular object. The current definition is in some section of the | |
1164 | dynamic object, but we're not including those sections. We have to | |
1165 | change the definition to something the rest of the link can | |
1166 | understand. */ | |
1167 | ||
b34976b6 | 1168 | static bfd_boolean |
252b5132 RH |
1169 | elf_m68k_adjust_dynamic_symbol (info, h) |
1170 | struct bfd_link_info *info; | |
1171 | struct elf_link_hash_entry *h; | |
1172 | { | |
cc3e26be | 1173 | struct elf_m68k_link_hash_table *htab; |
252b5132 RH |
1174 | bfd *dynobj; |
1175 | asection *s; | |
1176 | unsigned int power_of_two; | |
1177 | ||
cc3e26be | 1178 | htab = elf_m68k_hash_table (info); |
252b5132 RH |
1179 | dynobj = elf_hash_table (info)->dynobj; |
1180 | ||
1181 | /* Make sure we know what is going on here. */ | |
1182 | BFD_ASSERT (dynobj != NULL | |
f5385ebf | 1183 | && (h->needs_plt |
f6e332e6 | 1184 | || h->u.weakdef != NULL |
f5385ebf AM |
1185 | || (h->def_dynamic |
1186 | && h->ref_regular | |
1187 | && !h->def_regular))); | |
252b5132 RH |
1188 | |
1189 | /* If this is a function, put it in the procedure linkage table. We | |
1190 | will fill in the contents of the procedure linkage table later, | |
1191 | when we know the address of the .got section. */ | |
1192 | if (h->type == STT_FUNC | |
f5385ebf | 1193 | || h->needs_plt) |
252b5132 | 1194 | { |
9dfe8738 AS |
1195 | if ((h->plt.refcount <= 0 |
1196 | || SYMBOL_CALLS_LOCAL (info, h) | |
1197 | || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
1198 | && h->root.type == bfd_link_hash_undefweak)) | |
252b5132 RH |
1199 | /* We must always create the plt entry if it was referenced |
1200 | by a PLTxxO relocation. In this case we already recorded | |
1201 | it as a dynamic symbol. */ | |
1202 | && h->dynindx == -1) | |
1203 | { | |
1204 | /* This case can occur if we saw a PLTxx reloc in an input | |
1205 | file, but the symbol was never referred to by a dynamic | |
9dfe8738 AS |
1206 | object, or if all references were garbage collected. In |
1207 | such a case, we don't actually need to build a procedure | |
1208 | linkage table, and we can just do a PCxx reloc instead. */ | |
252b5132 | 1209 | h->plt.offset = (bfd_vma) -1; |
f5385ebf | 1210 | h->needs_plt = 0; |
b34976b6 | 1211 | return TRUE; |
252b5132 RH |
1212 | } |
1213 | ||
1214 | /* Make sure this symbol is output as a dynamic symbol. */ | |
b6152c34 | 1215 | if (h->dynindx == -1 |
f5385ebf | 1216 | && !h->forced_local) |
252b5132 | 1217 | { |
c152c796 | 1218 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 1219 | return FALSE; |
252b5132 RH |
1220 | } |
1221 | ||
1222 | s = bfd_get_section_by_name (dynobj, ".plt"); | |
1223 | BFD_ASSERT (s != NULL); | |
1224 | ||
1225 | /* If this is the first .plt entry, make room for the special | |
1226 | first entry. */ | |
eea6121a | 1227 | if (s->size == 0) |
cc3e26be | 1228 | s->size = htab->plt_info->size; |
252b5132 RH |
1229 | |
1230 | /* If this symbol is not defined in a regular file, and we are | |
1231 | not generating a shared library, then set the symbol to this | |
1232 | location in the .plt. This is required to make function | |
1233 | pointers compare as equal between the normal executable and | |
1234 | the shared library. */ | |
1235 | if (!info->shared | |
f5385ebf | 1236 | && !h->def_regular) |
252b5132 RH |
1237 | { |
1238 | h->root.u.def.section = s; | |
eea6121a | 1239 | h->root.u.def.value = s->size; |
252b5132 RH |
1240 | } |
1241 | ||
eea6121a | 1242 | h->plt.offset = s->size; |
252b5132 RH |
1243 | |
1244 | /* Make room for this entry. */ | |
cc3e26be | 1245 | s->size += htab->plt_info->size; |
252b5132 RH |
1246 | |
1247 | /* We also need to make an entry in the .got.plt section, which | |
1248 | will be placed in the .got section by the linker script. */ | |
252b5132 RH |
1249 | s = bfd_get_section_by_name (dynobj, ".got.plt"); |
1250 | BFD_ASSERT (s != NULL); | |
eea6121a | 1251 | s->size += 4; |
252b5132 RH |
1252 | |
1253 | /* We also need to make an entry in the .rela.plt section. */ | |
252b5132 RH |
1254 | s = bfd_get_section_by_name (dynobj, ".rela.plt"); |
1255 | BFD_ASSERT (s != NULL); | |
eea6121a | 1256 | s->size += sizeof (Elf32_External_Rela); |
252b5132 | 1257 | |
b34976b6 | 1258 | return TRUE; |
252b5132 RH |
1259 | } |
1260 | ||
1261 | /* Reinitialize the plt offset now that it is not used as a reference | |
1262 | count any more. */ | |
1263 | h->plt.offset = (bfd_vma) -1; | |
1264 | ||
1265 | /* If this is a weak symbol, and there is a real definition, the | |
1266 | processor independent code will have arranged for us to see the | |
1267 | real definition first, and we can just use the same value. */ | |
f6e332e6 | 1268 | if (h->u.weakdef != NULL) |
252b5132 | 1269 | { |
f6e332e6 AM |
1270 | BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined |
1271 | || h->u.weakdef->root.type == bfd_link_hash_defweak); | |
1272 | h->root.u.def.section = h->u.weakdef->root.u.def.section; | |
1273 | h->root.u.def.value = h->u.weakdef->root.u.def.value; | |
b34976b6 | 1274 | return TRUE; |
252b5132 RH |
1275 | } |
1276 | ||
1277 | /* This is a reference to a symbol defined by a dynamic object which | |
1278 | is not a function. */ | |
1279 | ||
1280 | /* If we are creating a shared library, we must presume that the | |
1281 | only references to the symbol are via the global offset table. | |
1282 | For such cases we need not do anything here; the relocations will | |
1283 | be handled correctly by relocate_section. */ | |
1284 | if (info->shared) | |
b34976b6 | 1285 | return TRUE; |
252b5132 | 1286 | |
909272ee AM |
1287 | if (h->size == 0) |
1288 | { | |
1289 | (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"), | |
1290 | h->root.root.string); | |
1291 | return TRUE; | |
1292 | } | |
1293 | ||
252b5132 RH |
1294 | /* We must allocate the symbol in our .dynbss section, which will |
1295 | become part of the .bss section of the executable. There will be | |
1296 | an entry for this symbol in the .dynsym section. The dynamic | |
1297 | object will contain position independent code, so all references | |
1298 | from the dynamic object to this symbol will go through the global | |
1299 | offset table. The dynamic linker will use the .dynsym entry to | |
1300 | determine the address it must put in the global offset table, so | |
1301 | both the dynamic object and the regular object will refer to the | |
1302 | same memory location for the variable. */ | |
1303 | ||
1304 | s = bfd_get_section_by_name (dynobj, ".dynbss"); | |
1305 | BFD_ASSERT (s != NULL); | |
1306 | ||
1307 | /* We must generate a R_68K_COPY reloc to tell the dynamic linker to | |
1308 | copy the initial value out of the dynamic object and into the | |
1309 | runtime process image. We need to remember the offset into the | |
1310 | .rela.bss section we are going to use. */ | |
1311 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) | |
1312 | { | |
1313 | asection *srel; | |
1314 | ||
1315 | srel = bfd_get_section_by_name (dynobj, ".rela.bss"); | |
1316 | BFD_ASSERT (srel != NULL); | |
eea6121a | 1317 | srel->size += sizeof (Elf32_External_Rela); |
f5385ebf | 1318 | h->needs_copy = 1; |
252b5132 RH |
1319 | } |
1320 | ||
1321 | /* We need to figure out the alignment required for this symbol. I | |
1322 | have no idea how ELF linkers handle this. */ | |
1323 | power_of_two = bfd_log2 (h->size); | |
1324 | if (power_of_two > 3) | |
1325 | power_of_two = 3; | |
1326 | ||
1327 | /* Apply the required alignment. */ | |
eea6121a | 1328 | s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two)); |
252b5132 RH |
1329 | if (power_of_two > bfd_get_section_alignment (dynobj, s)) |
1330 | { | |
1331 | if (!bfd_set_section_alignment (dynobj, s, power_of_two)) | |
b34976b6 | 1332 | return FALSE; |
252b5132 RH |
1333 | } |
1334 | ||
1335 | /* Define the symbol as being at this point in the section. */ | |
1336 | h->root.u.def.section = s; | |
eea6121a | 1337 | h->root.u.def.value = s->size; |
252b5132 RH |
1338 | |
1339 | /* Increment the section size to make room for the symbol. */ | |
eea6121a | 1340 | s->size += h->size; |
252b5132 | 1341 | |
b34976b6 | 1342 | return TRUE; |
252b5132 RH |
1343 | } |
1344 | ||
1345 | /* Set the sizes of the dynamic sections. */ | |
1346 | ||
b34976b6 | 1347 | static bfd_boolean |
252b5132 | 1348 | elf_m68k_size_dynamic_sections (output_bfd, info) |
aa91b392 | 1349 | bfd *output_bfd ATTRIBUTE_UNUSED; |
252b5132 RH |
1350 | struct bfd_link_info *info; |
1351 | { | |
1352 | bfd *dynobj; | |
1353 | asection *s; | |
b34976b6 AM |
1354 | bfd_boolean plt; |
1355 | bfd_boolean relocs; | |
252b5132 RH |
1356 | |
1357 | dynobj = elf_hash_table (info)->dynobj; | |
1358 | BFD_ASSERT (dynobj != NULL); | |
1359 | ||
1360 | if (elf_hash_table (info)->dynamic_sections_created) | |
1361 | { | |
1362 | /* Set the contents of the .interp section to the interpreter. */ | |
893c4fe2 | 1363 | if (info->executable) |
252b5132 RH |
1364 | { |
1365 | s = bfd_get_section_by_name (dynobj, ".interp"); | |
1366 | BFD_ASSERT (s != NULL); | |
eea6121a | 1367 | s->size = sizeof ELF_DYNAMIC_INTERPRETER; |
252b5132 RH |
1368 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
1369 | } | |
1370 | } | |
1371 | else | |
1372 | { | |
1373 | /* We may have created entries in the .rela.got section. | |
1374 | However, if we are not creating the dynamic sections, we will | |
1375 | not actually use these entries. Reset the size of .rela.got, | |
1376 | which will cause it to get stripped from the output file | |
1377 | below. */ | |
1378 | s = bfd_get_section_by_name (dynobj, ".rela.got"); | |
1379 | if (s != NULL) | |
eea6121a | 1380 | s->size = 0; |
252b5132 RH |
1381 | } |
1382 | ||
b6152c34 AS |
1383 | /* If this is a -Bsymbolic shared link, then we need to discard all |
1384 | PC relative relocs against symbols defined in a regular object. | |
1385 | For the normal shared case we discard the PC relative relocs | |
1386 | against symbols that have become local due to visibility changes. | |
1387 | We allocated space for them in the check_relocs routine, but we | |
1388 | will not fill them in in the relocate_section routine. */ | |
1389 | if (info->shared) | |
0cca5f05 AS |
1390 | elf_link_hash_traverse (elf_hash_table (info), |
1391 | elf_m68k_discard_copies, | |
1392 | (PTR) info); | |
252b5132 RH |
1393 | |
1394 | /* The check_relocs and adjust_dynamic_symbol entry points have | |
1395 | determined the sizes of the various dynamic sections. Allocate | |
1396 | memory for them. */ | |
b34976b6 AM |
1397 | plt = FALSE; |
1398 | relocs = FALSE; | |
252b5132 RH |
1399 | for (s = dynobj->sections; s != NULL; s = s->next) |
1400 | { | |
1401 | const char *name; | |
252b5132 RH |
1402 | |
1403 | if ((s->flags & SEC_LINKER_CREATED) == 0) | |
1404 | continue; | |
1405 | ||
1406 | /* It's OK to base decisions on the section name, because none | |
1407 | of the dynobj section names depend upon the input files. */ | |
1408 | name = bfd_get_section_name (dynobj, s); | |
1409 | ||
252b5132 RH |
1410 | if (strcmp (name, ".plt") == 0) |
1411 | { | |
c456f082 AM |
1412 | /* Remember whether there is a PLT. */ |
1413 | plt = s->size != 0; | |
252b5132 | 1414 | } |
0112cd26 | 1415 | else if (CONST_STRNEQ (name, ".rela")) |
252b5132 | 1416 | { |
c456f082 | 1417 | if (s->size != 0) |
252b5132 | 1418 | { |
b34976b6 | 1419 | relocs = TRUE; |
252b5132 RH |
1420 | |
1421 | /* We use the reloc_count field as a counter if we need | |
1422 | to copy relocs into the output file. */ | |
1423 | s->reloc_count = 0; | |
1424 | } | |
1425 | } | |
0112cd26 | 1426 | else if (! CONST_STRNEQ (name, ".got") |
c456f082 | 1427 | && strcmp (name, ".dynbss") != 0) |
252b5132 RH |
1428 | { |
1429 | /* It's not one of our sections, so don't allocate space. */ | |
1430 | continue; | |
1431 | } | |
1432 | ||
c456f082 | 1433 | if (s->size == 0) |
252b5132 | 1434 | { |
c456f082 AM |
1435 | /* If we don't need this section, strip it from the |
1436 | output file. This is mostly to handle .rela.bss and | |
1437 | .rela.plt. We must create both sections in | |
1438 | create_dynamic_sections, because they must be created | |
1439 | before the linker maps input sections to output | |
1440 | sections. The linker does that before | |
1441 | adjust_dynamic_symbol is called, and it is that | |
1442 | function which decides whether anything needs to go | |
1443 | into these sections. */ | |
8423293d | 1444 | s->flags |= SEC_EXCLUDE; |
252b5132 RH |
1445 | continue; |
1446 | } | |
1447 | ||
c456f082 AM |
1448 | if ((s->flags & SEC_HAS_CONTENTS) == 0) |
1449 | continue; | |
1450 | ||
252b5132 | 1451 | /* Allocate memory for the section contents. */ |
7a9af8c4 NC |
1452 | /* FIXME: This should be a call to bfd_alloc not bfd_zalloc. |
1453 | Unused entries should be reclaimed before the section's contents | |
1454 | are written out, but at the moment this does not happen. Thus in | |
1455 | order to prevent writing out garbage, we initialise the section's | |
1456 | contents to zero. */ | |
eea6121a | 1457 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); |
c456f082 | 1458 | if (s->contents == NULL) |
b34976b6 | 1459 | return FALSE; |
252b5132 RH |
1460 | } |
1461 | ||
1462 | if (elf_hash_table (info)->dynamic_sections_created) | |
1463 | { | |
1464 | /* Add some entries to the .dynamic section. We fill in the | |
1465 | values later, in elf_m68k_finish_dynamic_sections, but we | |
1466 | must add the entries now so that we get the correct size for | |
1467 | the .dynamic section. The DT_DEBUG entry is filled in by the | |
1468 | dynamic linker and used by the debugger. */ | |
dc810e39 | 1469 | #define add_dynamic_entry(TAG, VAL) \ |
5a580b3a | 1470 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) |
dc810e39 | 1471 | |
252b5132 RH |
1472 | if (!info->shared) |
1473 | { | |
dc810e39 | 1474 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
b34976b6 | 1475 | return FALSE; |
252b5132 RH |
1476 | } |
1477 | ||
1478 | if (plt) | |
1479 | { | |
dc810e39 AM |
1480 | if (!add_dynamic_entry (DT_PLTGOT, 0) |
1481 | || !add_dynamic_entry (DT_PLTRELSZ, 0) | |
1482 | || !add_dynamic_entry (DT_PLTREL, DT_RELA) | |
1483 | || !add_dynamic_entry (DT_JMPREL, 0)) | |
b34976b6 | 1484 | return FALSE; |
252b5132 RH |
1485 | } |
1486 | ||
1487 | if (relocs) | |
1488 | { | |
dc810e39 AM |
1489 | if (!add_dynamic_entry (DT_RELA, 0) |
1490 | || !add_dynamic_entry (DT_RELASZ, 0) | |
1491 | || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela))) | |
b34976b6 | 1492 | return FALSE; |
252b5132 RH |
1493 | } |
1494 | ||
aa91b392 | 1495 | if ((info->flags & DF_TEXTREL) != 0) |
252b5132 | 1496 | { |
dc810e39 | 1497 | if (!add_dynamic_entry (DT_TEXTREL, 0)) |
b34976b6 | 1498 | return FALSE; |
252b5132 RH |
1499 | } |
1500 | } | |
dc810e39 | 1501 | #undef add_dynamic_entry |
252b5132 | 1502 | |
b34976b6 | 1503 | return TRUE; |
252b5132 RH |
1504 | } |
1505 | ||
0cca5f05 | 1506 | /* This function is called via elf_link_hash_traverse if we are |
b6152c34 AS |
1507 | creating a shared object. In the -Bsymbolic case it discards the |
1508 | space allocated to copy PC relative relocs against symbols which | |
3e829b4a | 1509 | are defined in regular objects. For the normal shared case, it |
b6152c34 AS |
1510 | discards space for pc-relative relocs that have become local due to |
1511 | symbol visibility changes. We allocated space for them in the | |
1512 | check_relocs routine, but we won't fill them in in the | |
3e829b4a AS |
1513 | relocate_section routine. |
1514 | ||
1515 | We also check whether any of the remaining relocations apply | |
1516 | against a readonly section, and set the DF_TEXTREL flag in this | |
1517 | case. */ | |
252b5132 | 1518 | |
b34976b6 | 1519 | static bfd_boolean |
b6152c34 | 1520 | elf_m68k_discard_copies (h, inf) |
0cca5f05 | 1521 | struct elf_link_hash_entry *h; |
b6152c34 | 1522 | PTR inf; |
252b5132 | 1523 | { |
b6152c34 | 1524 | struct bfd_link_info *info = (struct bfd_link_info *) inf; |
252b5132 RH |
1525 | struct elf_m68k_pcrel_relocs_copied *s; |
1526 | ||
0cca5f05 AS |
1527 | if (h->root.type == bfd_link_hash_warning) |
1528 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
e92d460e | 1529 | |
f5385ebf | 1530 | if (!h->def_regular |
b6152c34 | 1531 | || (!info->symbolic |
f5385ebf | 1532 | && !h->forced_local)) |
3e829b4a AS |
1533 | { |
1534 | if ((info->flags & DF_TEXTREL) == 0) | |
1535 | { | |
1536 | /* Look for relocations against read-only sections. */ | |
0cca5f05 AS |
1537 | for (s = elf_m68k_hash_entry (h)->pcrel_relocs_copied; |
1538 | s != NULL; | |
1539 | s = s->next) | |
3e829b4a AS |
1540 | if ((s->section->flags & SEC_READONLY) != 0) |
1541 | { | |
1542 | info->flags |= DF_TEXTREL; | |
1543 | break; | |
1544 | } | |
1545 | } | |
0cca5f05 | 1546 | |
3e829b4a AS |
1547 | return TRUE; |
1548 | } | |
252b5132 | 1549 | |
0cca5f05 AS |
1550 | for (s = elf_m68k_hash_entry (h)->pcrel_relocs_copied; |
1551 | s != NULL; | |
1552 | s = s->next) | |
eea6121a | 1553 | s->section->size -= s->count * sizeof (Elf32_External_Rela); |
252b5132 | 1554 | |
b34976b6 | 1555 | return TRUE; |
252b5132 RH |
1556 | } |
1557 | ||
1558 | /* Relocate an M68K ELF section. */ | |
1559 | ||
b34976b6 | 1560 | static bfd_boolean |
252b5132 RH |
1561 | elf_m68k_relocate_section (output_bfd, info, input_bfd, input_section, |
1562 | contents, relocs, local_syms, local_sections) | |
1563 | bfd *output_bfd; | |
1564 | struct bfd_link_info *info; | |
1565 | bfd *input_bfd; | |
1566 | asection *input_section; | |
1567 | bfd_byte *contents; | |
1568 | Elf_Internal_Rela *relocs; | |
1569 | Elf_Internal_Sym *local_syms; | |
1570 | asection **local_sections; | |
1571 | { | |
1572 | bfd *dynobj; | |
1573 | Elf_Internal_Shdr *symtab_hdr; | |
1574 | struct elf_link_hash_entry **sym_hashes; | |
1575 | bfd_vma *local_got_offsets; | |
1576 | asection *sgot; | |
1577 | asection *splt; | |
1578 | asection *sreloc; | |
1579 | Elf_Internal_Rela *rel; | |
1580 | Elf_Internal_Rela *relend; | |
1581 | ||
1582 | dynobj = elf_hash_table (info)->dynobj; | |
1583 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
1584 | sym_hashes = elf_sym_hashes (input_bfd); | |
1585 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
1586 | ||
1587 | sgot = NULL; | |
1588 | splt = NULL; | |
1589 | sreloc = NULL; | |
1590 | ||
1591 | rel = relocs; | |
1592 | relend = relocs + input_section->reloc_count; | |
1593 | for (; rel < relend; rel++) | |
1594 | { | |
1595 | int r_type; | |
1596 | reloc_howto_type *howto; | |
1597 | unsigned long r_symndx; | |
1598 | struct elf_link_hash_entry *h; | |
1599 | Elf_Internal_Sym *sym; | |
1600 | asection *sec; | |
1601 | bfd_vma relocation; | |
44f745a6 | 1602 | bfd_boolean unresolved_reloc; |
252b5132 RH |
1603 | bfd_reloc_status_type r; |
1604 | ||
1605 | r_type = ELF32_R_TYPE (rel->r_info); | |
1606 | if (r_type < 0 || r_type >= (int) R_68K_max) | |
1607 | { | |
1608 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 1609 | return FALSE; |
252b5132 RH |
1610 | } |
1611 | howto = howto_table + r_type; | |
1612 | ||
1613 | r_symndx = ELF32_R_SYM (rel->r_info); | |
1614 | ||
252b5132 RH |
1615 | h = NULL; |
1616 | sym = NULL; | |
1617 | sec = NULL; | |
44f745a6 | 1618 | unresolved_reloc = FALSE; |
560e09e9 | 1619 | |
252b5132 RH |
1620 | if (r_symndx < symtab_hdr->sh_info) |
1621 | { | |
1622 | sym = local_syms + r_symndx; | |
1623 | sec = local_sections[r_symndx]; | |
8517fae7 | 1624 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); |
252b5132 RH |
1625 | } |
1626 | else | |
1627 | { | |
560e09e9 NC |
1628 | bfd_boolean warned; |
1629 | ||
b2a8e766 AM |
1630 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
1631 | r_symndx, symtab_hdr, sym_hashes, | |
1632 | h, sec, relocation, | |
1633 | unresolved_reloc, warned); | |
252b5132 RH |
1634 | } |
1635 | ||
ab96bf03 AM |
1636 | if (sec != NULL && elf_discarded_section (sec)) |
1637 | { | |
1638 | /* For relocs against symbols from removed linkonce sections, | |
1639 | or sections discarded by a linker script, we just want the | |
1640 | section contents zeroed. Avoid any special processing. */ | |
1641 | _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset); | |
1642 | rel->r_info = 0; | |
1643 | rel->r_addend = 0; | |
1644 | continue; | |
1645 | } | |
1646 | ||
1647 | if (info->relocatable) | |
1648 | continue; | |
1649 | ||
252b5132 RH |
1650 | switch (r_type) |
1651 | { | |
1652 | case R_68K_GOT8: | |
1653 | case R_68K_GOT16: | |
1654 | case R_68K_GOT32: | |
1655 | /* Relocation is to the address of the entry for this symbol | |
1656 | in the global offset table. */ | |
1657 | if (h != NULL | |
1658 | && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) | |
1659 | break; | |
1660 | /* Fall through. */ | |
1661 | case R_68K_GOT8O: | |
1662 | case R_68K_GOT16O: | |
1663 | case R_68K_GOT32O: | |
1664 | /* Relocation is the offset of the entry for this symbol in | |
1665 | the global offset table. */ | |
1666 | ||
1667 | { | |
1668 | bfd_vma off; | |
1669 | ||
1670 | if (sgot == NULL) | |
1671 | { | |
1672 | sgot = bfd_get_section_by_name (dynobj, ".got"); | |
1673 | BFD_ASSERT (sgot != NULL); | |
1674 | } | |
1675 | ||
1676 | if (h != NULL) | |
1677 | { | |
a5ad465a AS |
1678 | bfd_boolean dyn; |
1679 | ||
252b5132 RH |
1680 | off = h->got.offset; |
1681 | BFD_ASSERT (off != (bfd_vma) -1); | |
1682 | ||
a5ad465a AS |
1683 | dyn = elf_hash_table (info)->dynamic_sections_created; |
1684 | if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) | |
252b5132 | 1685 | || (info->shared |
a5ad465a AS |
1686 | && (info->symbolic |
1687 | || h->dynindx == -1 | |
f5385ebf AM |
1688 | || h->forced_local) |
1689 | && h->def_regular)) | |
252b5132 RH |
1690 | { |
1691 | /* This is actually a static link, or it is a | |
1692 | -Bsymbolic link and the symbol is defined | |
1693 | locally, or the symbol was forced to be local | |
1694 | because of a version file.. We must initialize | |
1695 | this entry in the global offset table. Since | |
1696 | the offset must always be a multiple of 4, we | |
1697 | use the least significant bit to record whether | |
1698 | we have initialized it already. | |
1699 | ||
1700 | When doing a dynamic link, we create a .rela.got | |
1701 | relocation entry to initialize the value. This | |
1702 | is done in the finish_dynamic_symbol routine. */ | |
1703 | if ((off & 1) != 0) | |
1704 | off &= ~1; | |
1705 | else | |
1706 | { | |
1707 | bfd_put_32 (output_bfd, relocation, | |
1708 | sgot->contents + off); | |
1709 | h->got.offset |= 1; | |
1710 | } | |
1711 | } | |
44f745a6 AS |
1712 | else |
1713 | unresolved_reloc = FALSE; | |
252b5132 RH |
1714 | } |
1715 | else | |
1716 | { | |
1717 | BFD_ASSERT (local_got_offsets != NULL | |
1718 | && local_got_offsets[r_symndx] != (bfd_vma) -1); | |
1719 | ||
1720 | off = local_got_offsets[r_symndx]; | |
1721 | ||
1722 | /* The offset must always be a multiple of 4. We use | |
1723 | the least significant bit to record whether we have | |
1724 | already generated the necessary reloc. */ | |
1725 | if ((off & 1) != 0) | |
1726 | off &= ~1; | |
1727 | else | |
1728 | { | |
1729 | bfd_put_32 (output_bfd, relocation, sgot->contents + off); | |
1730 | ||
1731 | if (info->shared) | |
1732 | { | |
947216bf | 1733 | asection *s; |
252b5132 | 1734 | Elf_Internal_Rela outrel; |
947216bf | 1735 | bfd_byte *loc; |
252b5132 | 1736 | |
947216bf AM |
1737 | s = bfd_get_section_by_name (dynobj, ".rela.got"); |
1738 | BFD_ASSERT (s != NULL); | |
252b5132 RH |
1739 | |
1740 | outrel.r_offset = (sgot->output_section->vma | |
1741 | + sgot->output_offset | |
1742 | + off); | |
1743 | outrel.r_info = ELF32_R_INFO (0, R_68K_RELATIVE); | |
1744 | outrel.r_addend = relocation; | |
947216bf AM |
1745 | loc = s->contents; |
1746 | loc += s->reloc_count++ * sizeof (Elf32_External_Rela); | |
1747 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); | |
252b5132 RH |
1748 | } |
1749 | ||
1750 | local_got_offsets[r_symndx] |= 1; | |
1751 | } | |
1752 | } | |
1753 | ||
1754 | relocation = sgot->output_offset + off; | |
1755 | if (r_type == R_68K_GOT8O | |
1756 | || r_type == R_68K_GOT16O | |
1757 | || r_type == R_68K_GOT32O) | |
1758 | { | |
1759 | /* This relocation does not use the addend. */ | |
1760 | rel->r_addend = 0; | |
1761 | } | |
1762 | else | |
1763 | relocation += sgot->output_section->vma; | |
1764 | } | |
1765 | break; | |
1766 | ||
1767 | case R_68K_PLT8: | |
1768 | case R_68K_PLT16: | |
1769 | case R_68K_PLT32: | |
1770 | /* Relocation is to the entry for this symbol in the | |
1771 | procedure linkage table. */ | |
1772 | ||
1773 | /* Resolve a PLTxx reloc against a local symbol directly, | |
1774 | without using the procedure linkage table. */ | |
1775 | if (h == NULL) | |
1776 | break; | |
1777 | ||
1778 | if (h->plt.offset == (bfd_vma) -1 | |
1779 | || !elf_hash_table (info)->dynamic_sections_created) | |
1780 | { | |
1781 | /* We didn't make a PLT entry for this symbol. This | |
1782 | happens when statically linking PIC code, or when | |
1783 | using -Bsymbolic. */ | |
1784 | break; | |
1785 | } | |
1786 | ||
1787 | if (splt == NULL) | |
1788 | { | |
1789 | splt = bfd_get_section_by_name (dynobj, ".plt"); | |
1790 | BFD_ASSERT (splt != NULL); | |
1791 | } | |
1792 | ||
1793 | relocation = (splt->output_section->vma | |
1794 | + splt->output_offset | |
1795 | + h->plt.offset); | |
44f745a6 | 1796 | unresolved_reloc = FALSE; |
252b5132 RH |
1797 | break; |
1798 | ||
1799 | case R_68K_PLT8O: | |
1800 | case R_68K_PLT16O: | |
1801 | case R_68K_PLT32O: | |
1802 | /* Relocation is the offset of the entry for this symbol in | |
1803 | the procedure linkage table. */ | |
1804 | BFD_ASSERT (h != NULL && h->plt.offset != (bfd_vma) -1); | |
1805 | ||
1806 | if (splt == NULL) | |
1807 | { | |
1808 | splt = bfd_get_section_by_name (dynobj, ".plt"); | |
1809 | BFD_ASSERT (splt != NULL); | |
1810 | } | |
1811 | ||
1812 | relocation = h->plt.offset; | |
44f745a6 | 1813 | unresolved_reloc = FALSE; |
252b5132 RH |
1814 | |
1815 | /* This relocation does not use the addend. */ | |
1816 | rel->r_addend = 0; | |
1817 | ||
1818 | break; | |
1819 | ||
1820 | case R_68K_PC8: | |
1821 | case R_68K_PC16: | |
1822 | case R_68K_PC32: | |
b6152c34 AS |
1823 | if (h == NULL |
1824 | || (info->shared | |
f5385ebf | 1825 | && h->forced_local)) |
252b5132 RH |
1826 | break; |
1827 | /* Fall through. */ | |
1828 | case R_68K_8: | |
1829 | case R_68K_16: | |
1830 | case R_68K_32: | |
1831 | if (info->shared | |
ec338859 | 1832 | && r_symndx != 0 |
252b5132 | 1833 | && (input_section->flags & SEC_ALLOC) != 0 |
d2ff124f AS |
1834 | && (h == NULL |
1835 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
1836 | || h->root.type != bfd_link_hash_undefweak) | |
252b5132 RH |
1837 | && ((r_type != R_68K_PC8 |
1838 | && r_type != R_68K_PC16 | |
1839 | && r_type != R_68K_PC32) | |
d2ff124f AS |
1840 | || (h != NULL |
1841 | && h->dynindx != -1 | |
1842 | && (!info->symbolic | |
f5385ebf | 1843 | || !h->def_regular)))) |
252b5132 RH |
1844 | { |
1845 | Elf_Internal_Rela outrel; | |
947216bf | 1846 | bfd_byte *loc; |
b34976b6 | 1847 | bfd_boolean skip, relocate; |
252b5132 RH |
1848 | |
1849 | /* When generating a shared object, these relocations | |
1850 | are copied into the output file to be resolved at run | |
1851 | time. */ | |
1852 | ||
b34976b6 AM |
1853 | skip = FALSE; |
1854 | relocate = FALSE; | |
252b5132 | 1855 | |
c629eae0 JJ |
1856 | outrel.r_offset = |
1857 | _bfd_elf_section_offset (output_bfd, info, input_section, | |
1858 | rel->r_offset); | |
1859 | if (outrel.r_offset == (bfd_vma) -1) | |
b34976b6 | 1860 | skip = TRUE; |
0bb2d96a | 1861 | else if (outrel.r_offset == (bfd_vma) -2) |
b34976b6 | 1862 | skip = TRUE, relocate = TRUE; |
252b5132 RH |
1863 | outrel.r_offset += (input_section->output_section->vma |
1864 | + input_section->output_offset); | |
1865 | ||
1866 | if (skip) | |
0bb2d96a | 1867 | memset (&outrel, 0, sizeof outrel); |
252b5132 | 1868 | else if (h != NULL |
d2ff124f AS |
1869 | && h->dynindx != -1 |
1870 | && (r_type == R_68K_PC8 | |
1871 | || r_type == R_68K_PC16 | |
1872 | || r_type == R_68K_PC32 | |
1873 | || !info->shared | |
1874 | || !info->symbolic | |
f5385ebf | 1875 | || !h->def_regular)) |
252b5132 | 1876 | { |
252b5132 | 1877 | outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); |
d2ff124f | 1878 | outrel.r_addend = rel->r_addend; |
252b5132 RH |
1879 | } |
1880 | else | |
1881 | { | |
d2ff124f | 1882 | /* This symbol is local, or marked to become local. */ |
74541ad4 AM |
1883 | outrel.r_addend = relocation + rel->r_addend; |
1884 | ||
252b5132 RH |
1885 | if (r_type == R_68K_32) |
1886 | { | |
b34976b6 | 1887 | relocate = TRUE; |
252b5132 | 1888 | outrel.r_info = ELF32_R_INFO (0, R_68K_RELATIVE); |
252b5132 RH |
1889 | } |
1890 | else | |
1891 | { | |
1892 | long indx; | |
1893 | ||
8517fae7 | 1894 | if (bfd_is_abs_section (sec)) |
252b5132 RH |
1895 | indx = 0; |
1896 | else if (sec == NULL || sec->owner == NULL) | |
1897 | { | |
1898 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 1899 | return FALSE; |
252b5132 RH |
1900 | } |
1901 | else | |
1902 | { | |
1903 | asection *osec; | |
1904 | ||
74541ad4 AM |
1905 | /* We are turning this relocation into one |
1906 | against a section symbol. It would be | |
1907 | proper to subtract the symbol's value, | |
1908 | osec->vma, from the emitted reloc addend, | |
1909 | but ld.so expects buggy relocs. */ | |
252b5132 RH |
1910 | osec = sec->output_section; |
1911 | indx = elf_section_data (osec)->dynindx; | |
74541ad4 AM |
1912 | if (indx == 0) |
1913 | { | |
1914 | struct elf_link_hash_table *htab; | |
1915 | htab = elf_hash_table (info); | |
1916 | osec = htab->text_index_section; | |
1917 | indx = elf_section_data (osec)->dynindx; | |
1918 | } | |
1919 | BFD_ASSERT (indx != 0); | |
252b5132 RH |
1920 | } |
1921 | ||
252b5132 | 1922 | outrel.r_info = ELF32_R_INFO (indx, r_type); |
252b5132 RH |
1923 | } |
1924 | } | |
1925 | ||
d2ff124f AS |
1926 | sreloc = elf_section_data (input_section)->sreloc; |
1927 | if (sreloc == NULL) | |
1928 | abort (); | |
1929 | ||
947216bf AM |
1930 | loc = sreloc->contents; |
1931 | loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela); | |
1932 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); | |
252b5132 RH |
1933 | |
1934 | /* This reloc will be computed at runtime, so there's no | |
1935 | need to do anything now, except for R_68K_32 | |
1936 | relocations that have been turned into | |
1937 | R_68K_RELATIVE. */ | |
1938 | if (!relocate) | |
1939 | continue; | |
1940 | } | |
1941 | ||
1942 | break; | |
1943 | ||
1944 | case R_68K_GNU_VTINHERIT: | |
1945 | case R_68K_GNU_VTENTRY: | |
1946 | /* These are no-ops in the end. */ | |
1947 | continue; | |
1948 | ||
1949 | default: | |
1950 | break; | |
1951 | } | |
1952 | ||
44f745a6 AS |
1953 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections |
1954 | because such sections are not SEC_ALLOC and thus ld.so will | |
1955 | not process them. */ | |
1956 | if (unresolved_reloc | |
1957 | && !((input_section->flags & SEC_DEBUGGING) != 0 | |
f5385ebf | 1958 | && h->def_dynamic)) |
44f745a6 AS |
1959 | { |
1960 | (*_bfd_error_handler) | |
843fe662 | 1961 | (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"), |
d003868e AM |
1962 | input_bfd, |
1963 | input_section, | |
44f745a6 | 1964 | (long) rel->r_offset, |
843fe662 | 1965 | howto->name, |
44f745a6 AS |
1966 | h->root.root.string); |
1967 | return FALSE; | |
1968 | } | |
1969 | ||
252b5132 RH |
1970 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
1971 | contents, rel->r_offset, | |
1972 | relocation, rel->r_addend); | |
1973 | ||
1974 | if (r != bfd_reloc_ok) | |
1975 | { | |
44f745a6 AS |
1976 | const char *name; |
1977 | ||
1978 | if (h != NULL) | |
1979 | name = h->root.root.string; | |
1980 | else | |
252b5132 | 1981 | { |
44f745a6 AS |
1982 | name = bfd_elf_string_from_elf_section (input_bfd, |
1983 | symtab_hdr->sh_link, | |
1984 | sym->st_name); | |
1985 | if (name == NULL) | |
1986 | return FALSE; | |
1987 | if (*name == '\0') | |
1988 | name = bfd_section_name (input_bfd, sec); | |
1989 | } | |
252b5132 | 1990 | |
44f745a6 AS |
1991 | if (r == bfd_reloc_overflow) |
1992 | { | |
1993 | if (!(info->callbacks->reloc_overflow | |
dfeffb9f L |
1994 | (info, (h ? &h->root : NULL), name, howto->name, |
1995 | (bfd_vma) 0, input_bfd, input_section, | |
1996 | rel->r_offset))) | |
44f745a6 AS |
1997 | return FALSE; |
1998 | } | |
1999 | else | |
2000 | { | |
2001 | (*_bfd_error_handler) | |
d003868e AM |
2002 | (_("%B(%A+0x%lx): reloc against `%s': error %d"), |
2003 | input_bfd, input_section, | |
44f745a6 AS |
2004 | (long) rel->r_offset, name, (int) r); |
2005 | return FALSE; | |
252b5132 RH |
2006 | } |
2007 | } | |
2008 | } | |
2009 | ||
b34976b6 | 2010 | return TRUE; |
252b5132 RH |
2011 | } |
2012 | ||
cc3e26be RS |
2013 | /* Install an M_68K_PC32 relocation against VALUE at offset OFFSET |
2014 | into section SEC. */ | |
2015 | ||
2016 | static void | |
2017 | elf_m68k_install_pc32 (asection *sec, bfd_vma offset, bfd_vma value) | |
2018 | { | |
2019 | /* Make VALUE PC-relative. */ | |
2020 | value -= sec->output_section->vma + offset; | |
2021 | ||
2022 | /* Apply any in-place addend. */ | |
2023 | value += bfd_get_32 (sec->owner, sec->contents + offset); | |
2024 | ||
2025 | bfd_put_32 (sec->owner, value, sec->contents + offset); | |
2026 | } | |
2027 | ||
252b5132 RH |
2028 | /* Finish up dynamic symbol handling. We set the contents of various |
2029 | dynamic sections here. */ | |
2030 | ||
b34976b6 | 2031 | static bfd_boolean |
252b5132 RH |
2032 | elf_m68k_finish_dynamic_symbol (output_bfd, info, h, sym) |
2033 | bfd *output_bfd; | |
2034 | struct bfd_link_info *info; | |
2035 | struct elf_link_hash_entry *h; | |
2036 | Elf_Internal_Sym *sym; | |
2037 | { | |
2038 | bfd *dynobj; | |
2039 | ||
2040 | dynobj = elf_hash_table (info)->dynobj; | |
2041 | ||
2042 | if (h->plt.offset != (bfd_vma) -1) | |
2043 | { | |
cc3e26be | 2044 | const struct elf_m68k_plt_info *plt_info; |
252b5132 RH |
2045 | asection *splt; |
2046 | asection *sgot; | |
2047 | asection *srela; | |
2048 | bfd_vma plt_index; | |
2049 | bfd_vma got_offset; | |
2050 | Elf_Internal_Rela rela; | |
947216bf | 2051 | bfd_byte *loc; |
252b5132 RH |
2052 | |
2053 | /* This symbol has an entry in the procedure linkage table. Set | |
2054 | it up. */ | |
2055 | ||
2056 | BFD_ASSERT (h->dynindx != -1); | |
2057 | ||
cc3e26be | 2058 | plt_info = elf_m68k_hash_table (info)->plt_info; |
252b5132 RH |
2059 | splt = bfd_get_section_by_name (dynobj, ".plt"); |
2060 | sgot = bfd_get_section_by_name (dynobj, ".got.plt"); | |
2061 | srela = bfd_get_section_by_name (dynobj, ".rela.plt"); | |
2062 | BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL); | |
2063 | ||
2064 | /* Get the index in the procedure linkage table which | |
2065 | corresponds to this symbol. This is the index of this symbol | |
2066 | in all the symbols for which we are making plt entries. The | |
2067 | first entry in the procedure linkage table is reserved. */ | |
cc3e26be | 2068 | plt_index = (h->plt.offset / plt_info->size) - 1; |
252b5132 RH |
2069 | |
2070 | /* Get the offset into the .got table of the entry that | |
2071 | corresponds to this function. Each .got entry is 4 bytes. | |
2072 | The first three are reserved. */ | |
2073 | got_offset = (plt_index + 3) * 4; | |
2074 | ||
cc3e26be RS |
2075 | memcpy (splt->contents + h->plt.offset, |
2076 | plt_info->symbol_entry, | |
2077 | plt_info->size); | |
2078 | ||
2079 | elf_m68k_install_pc32 (splt, h->plt.offset + plt_info->symbol_relocs.got, | |
2080 | (sgot->output_section->vma | |
2081 | + sgot->output_offset | |
2082 | + got_offset)); | |
252b5132 RH |
2083 | |
2084 | bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela), | |
cc3e26be RS |
2085 | splt->contents |
2086 | + h->plt.offset | |
2087 | + plt_info->symbol_resolve_entry + 2); | |
2088 | ||
2089 | elf_m68k_install_pc32 (splt, h->plt.offset + plt_info->symbol_relocs.plt, | |
2090 | splt->output_section->vma); | |
252b5132 RH |
2091 | |
2092 | /* Fill in the entry in the global offset table. */ | |
2093 | bfd_put_32 (output_bfd, | |
2094 | (splt->output_section->vma | |
2095 | + splt->output_offset | |
2096 | + h->plt.offset | |
cc3e26be | 2097 | + plt_info->symbol_resolve_entry), |
252b5132 RH |
2098 | sgot->contents + got_offset); |
2099 | ||
2100 | /* Fill in the entry in the .rela.plt section. */ | |
2101 | rela.r_offset = (sgot->output_section->vma | |
2102 | + sgot->output_offset | |
2103 | + got_offset); | |
2104 | rela.r_info = ELF32_R_INFO (h->dynindx, R_68K_JMP_SLOT); | |
2105 | rela.r_addend = 0; | |
947216bf AM |
2106 | loc = srela->contents + plt_index * sizeof (Elf32_External_Rela); |
2107 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); | |
252b5132 | 2108 | |
f5385ebf | 2109 | if (!h->def_regular) |
252b5132 RH |
2110 | { |
2111 | /* Mark the symbol as undefined, rather than as defined in | |
2112 | the .plt section. Leave the value alone. */ | |
2113 | sym->st_shndx = SHN_UNDEF; | |
2114 | } | |
2115 | } | |
2116 | ||
2117 | if (h->got.offset != (bfd_vma) -1) | |
2118 | { | |
2119 | asection *sgot; | |
2120 | asection *srela; | |
2121 | Elf_Internal_Rela rela; | |
947216bf | 2122 | bfd_byte *loc; |
252b5132 RH |
2123 | |
2124 | /* This symbol has an entry in the global offset table. Set it | |
2125 | up. */ | |
2126 | ||
2127 | sgot = bfd_get_section_by_name (dynobj, ".got"); | |
2128 | srela = bfd_get_section_by_name (dynobj, ".rela.got"); | |
2129 | BFD_ASSERT (sgot != NULL && srela != NULL); | |
2130 | ||
2131 | rela.r_offset = (sgot->output_section->vma | |
2132 | + sgot->output_offset | |
dc810e39 | 2133 | + (h->got.offset &~ (bfd_vma) 1)); |
252b5132 RH |
2134 | |
2135 | /* If this is a -Bsymbolic link, and the symbol is defined | |
2136 | locally, we just want to emit a RELATIVE reloc. Likewise if | |
2137 | the symbol was forced to be local because of a version file. | |
2138 | The entry in the global offset table will already have been | |
2139 | initialized in the relocate_section function. */ | |
2140 | if (info->shared | |
a5ad465a AS |
2141 | && (info->symbolic |
2142 | || h->dynindx == -1 | |
f5385ebf AM |
2143 | || h->forced_local) |
2144 | && h->def_regular) | |
252b5132 RH |
2145 | { |
2146 | rela.r_info = ELF32_R_INFO (0, R_68K_RELATIVE); | |
2147 | rela.r_addend = bfd_get_signed_32 (output_bfd, | |
2148 | (sgot->contents | |
dc810e39 | 2149 | + (h->got.offset &~ (bfd_vma) 1))); |
252b5132 RH |
2150 | } |
2151 | else | |
2152 | { | |
2153 | bfd_put_32 (output_bfd, (bfd_vma) 0, | |
dc810e39 | 2154 | sgot->contents + (h->got.offset &~ (bfd_vma) 1)); |
252b5132 RH |
2155 | rela.r_info = ELF32_R_INFO (h->dynindx, R_68K_GLOB_DAT); |
2156 | rela.r_addend = 0; | |
2157 | } | |
2158 | ||
947216bf AM |
2159 | loc = srela->contents; |
2160 | loc += srela->reloc_count++ * sizeof (Elf32_External_Rela); | |
2161 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); | |
252b5132 RH |
2162 | } |
2163 | ||
f5385ebf | 2164 | if (h->needs_copy) |
252b5132 RH |
2165 | { |
2166 | asection *s; | |
2167 | Elf_Internal_Rela rela; | |
947216bf | 2168 | bfd_byte *loc; |
252b5132 RH |
2169 | |
2170 | /* This symbol needs a copy reloc. Set it up. */ | |
2171 | ||
2172 | BFD_ASSERT (h->dynindx != -1 | |
2173 | && (h->root.type == bfd_link_hash_defined | |
2174 | || h->root.type == bfd_link_hash_defweak)); | |
2175 | ||
2176 | s = bfd_get_section_by_name (h->root.u.def.section->owner, | |
2177 | ".rela.bss"); | |
2178 | BFD_ASSERT (s != NULL); | |
2179 | ||
2180 | rela.r_offset = (h->root.u.def.value | |
2181 | + h->root.u.def.section->output_section->vma | |
2182 | + h->root.u.def.section->output_offset); | |
2183 | rela.r_info = ELF32_R_INFO (h->dynindx, R_68K_COPY); | |
2184 | rela.r_addend = 0; | |
947216bf AM |
2185 | loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela); |
2186 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); | |
252b5132 RH |
2187 | } |
2188 | ||
2189 | /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */ | |
2190 | if (strcmp (h->root.root.string, "_DYNAMIC") == 0 | |
22edb2f1 | 2191 | || h == elf_hash_table (info)->hgot) |
252b5132 RH |
2192 | sym->st_shndx = SHN_ABS; |
2193 | ||
b34976b6 | 2194 | return TRUE; |
252b5132 RH |
2195 | } |
2196 | ||
2197 | /* Finish up the dynamic sections. */ | |
2198 | ||
b34976b6 | 2199 | static bfd_boolean |
252b5132 RH |
2200 | elf_m68k_finish_dynamic_sections (output_bfd, info) |
2201 | bfd *output_bfd; | |
2202 | struct bfd_link_info *info; | |
2203 | { | |
2204 | bfd *dynobj; | |
2205 | asection *sgot; | |
2206 | asection *sdyn; | |
2207 | ||
2208 | dynobj = elf_hash_table (info)->dynobj; | |
2209 | ||
2210 | sgot = bfd_get_section_by_name (dynobj, ".got.plt"); | |
2211 | BFD_ASSERT (sgot != NULL); | |
2212 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); | |
2213 | ||
2214 | if (elf_hash_table (info)->dynamic_sections_created) | |
2215 | { | |
2216 | asection *splt; | |
2217 | Elf32_External_Dyn *dyncon, *dynconend; | |
2218 | ||
2219 | splt = bfd_get_section_by_name (dynobj, ".plt"); | |
2220 | BFD_ASSERT (splt != NULL && sdyn != NULL); | |
2221 | ||
2222 | dyncon = (Elf32_External_Dyn *) sdyn->contents; | |
eea6121a | 2223 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); |
252b5132 RH |
2224 | for (; dyncon < dynconend; dyncon++) |
2225 | { | |
2226 | Elf_Internal_Dyn dyn; | |
2227 | const char *name; | |
2228 | asection *s; | |
2229 | ||
2230 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); | |
2231 | ||
2232 | switch (dyn.d_tag) | |
2233 | { | |
2234 | default: | |
2235 | break; | |
2236 | ||
2237 | case DT_PLTGOT: | |
2238 | name = ".got"; | |
2239 | goto get_vma; | |
2240 | case DT_JMPREL: | |
2241 | name = ".rela.plt"; | |
2242 | get_vma: | |
2243 | s = bfd_get_section_by_name (output_bfd, name); | |
2244 | BFD_ASSERT (s != NULL); | |
2245 | dyn.d_un.d_ptr = s->vma; | |
2246 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); | |
2247 | break; | |
2248 | ||
2249 | case DT_PLTRELSZ: | |
2250 | s = bfd_get_section_by_name (output_bfd, ".rela.plt"); | |
2251 | BFD_ASSERT (s != NULL); | |
eea6121a | 2252 | dyn.d_un.d_val = s->size; |
252b5132 RH |
2253 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
2254 | break; | |
2255 | ||
2256 | case DT_RELASZ: | |
2257 | /* The procedure linkage table relocs (DT_JMPREL) should | |
2258 | not be included in the overall relocs (DT_RELA). | |
2259 | Therefore, we override the DT_RELASZ entry here to | |
2260 | make it not include the JMPREL relocs. Since the | |
2261 | linker script arranges for .rela.plt to follow all | |
2262 | other relocation sections, we don't have to worry | |
2263 | about changing the DT_RELA entry. */ | |
2264 | s = bfd_get_section_by_name (output_bfd, ".rela.plt"); | |
2265 | if (s != NULL) | |
eea6121a | 2266 | dyn.d_un.d_val -= s->size; |
252b5132 RH |
2267 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
2268 | break; | |
2269 | } | |
2270 | } | |
2271 | ||
2272 | /* Fill in the first entry in the procedure linkage table. */ | |
eea6121a | 2273 | if (splt->size > 0) |
252b5132 | 2274 | { |
cc3e26be RS |
2275 | const struct elf_m68k_plt_info *plt_info; |
2276 | ||
2277 | plt_info = elf_m68k_hash_table (info)->plt_info; | |
2278 | memcpy (splt->contents, plt_info->plt0_entry, plt_info->size); | |
2279 | ||
2280 | elf_m68k_install_pc32 (splt, plt_info->plt0_relocs.got4, | |
2281 | (sgot->output_section->vma | |
2282 | + sgot->output_offset | |
2283 | + 4)); | |
2284 | ||
2285 | elf_m68k_install_pc32 (splt, plt_info->plt0_relocs.got8, | |
2286 | (sgot->output_section->vma | |
2287 | + sgot->output_offset | |
2288 | + 8)); | |
2289 | ||
2290 | elf_section_data (splt->output_section)->this_hdr.sh_entsize | |
2291 | = plt_info->size; | |
252b5132 | 2292 | } |
252b5132 RH |
2293 | } |
2294 | ||
2295 | /* Fill in the first three entries in the global offset table. */ | |
eea6121a | 2296 | if (sgot->size > 0) |
252b5132 RH |
2297 | { |
2298 | if (sdyn == NULL) | |
2299 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents); | |
2300 | else | |
2301 | bfd_put_32 (output_bfd, | |
2302 | sdyn->output_section->vma + sdyn->output_offset, | |
2303 | sgot->contents); | |
2304 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4); | |
2305 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8); | |
2306 | } | |
2307 | ||
2308 | elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4; | |
2309 | ||
b34976b6 | 2310 | return TRUE; |
252b5132 RH |
2311 | } |
2312 | ||
0752970e NC |
2313 | /* Given a .data section and a .emreloc in-memory section, store |
2314 | relocation information into the .emreloc section which can be | |
2315 | used at runtime to relocate the section. This is called by the | |
2316 | linker when the --embedded-relocs switch is used. This is called | |
2317 | after the add_symbols entry point has been called for all the | |
2318 | objects, and before the final_link entry point is called. */ | |
2319 | ||
b34976b6 | 2320 | bfd_boolean |
0752970e NC |
2321 | bfd_m68k_elf32_create_embedded_relocs (abfd, info, datasec, relsec, errmsg) |
2322 | bfd *abfd; | |
2323 | struct bfd_link_info *info; | |
2324 | asection *datasec; | |
2325 | asection *relsec; | |
2326 | char **errmsg; | |
2327 | { | |
2328 | Elf_Internal_Shdr *symtab_hdr; | |
6cdc0ccc AM |
2329 | Elf_Internal_Sym *isymbuf = NULL; |
2330 | Elf_Internal_Rela *internal_relocs = NULL; | |
0752970e NC |
2331 | Elf_Internal_Rela *irel, *irelend; |
2332 | bfd_byte *p; | |
dc810e39 | 2333 | bfd_size_type amt; |
0752970e | 2334 | |
1049f94e | 2335 | BFD_ASSERT (! info->relocatable); |
0752970e NC |
2336 | |
2337 | *errmsg = NULL; | |
2338 | ||
2339 | if (datasec->reloc_count == 0) | |
b34976b6 | 2340 | return TRUE; |
0752970e NC |
2341 | |
2342 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
9ad5cbcf | 2343 | |
0752970e | 2344 | /* Get a copy of the native relocations. */ |
45d6a902 | 2345 | internal_relocs = (_bfd_elf_link_read_relocs |
0752970e NC |
2346 | (abfd, datasec, (PTR) NULL, (Elf_Internal_Rela *) NULL, |
2347 | info->keep_memory)); | |
2348 | if (internal_relocs == NULL) | |
2349 | goto error_return; | |
0752970e | 2350 | |
dc810e39 AM |
2351 | amt = (bfd_size_type) datasec->reloc_count * 12; |
2352 | relsec->contents = (bfd_byte *) bfd_alloc (abfd, amt); | |
0752970e NC |
2353 | if (relsec->contents == NULL) |
2354 | goto error_return; | |
2355 | ||
2356 | p = relsec->contents; | |
2357 | ||
2358 | irelend = internal_relocs + datasec->reloc_count; | |
2359 | for (irel = internal_relocs; irel < irelend; irel++, p += 12) | |
2360 | { | |
2361 | asection *targetsec; | |
2362 | ||
2363 | /* We are going to write a four byte longword into the runtime | |
2364 | reloc section. The longword will be the address in the data | |
2365 | section which must be relocated. It is followed by the name | |
2366 | of the target section NUL-padded or truncated to 8 | |
2367 | characters. */ | |
2368 | ||
2369 | /* We can only relocate absolute longword relocs at run time. */ | |
2370 | if (ELF32_R_TYPE (irel->r_info) != (int) R_68K_32) | |
2371 | { | |
2372 | *errmsg = _("unsupported reloc type"); | |
2373 | bfd_set_error (bfd_error_bad_value); | |
2374 | goto error_return; | |
2375 | } | |
2376 | ||
2377 | /* Get the target section referred to by the reloc. */ | |
2378 | if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info) | |
2379 | { | |
0752970e | 2380 | /* A local symbol. */ |
6cdc0ccc AM |
2381 | Elf_Internal_Sym *isym; |
2382 | ||
2383 | /* Read this BFD's local symbols if we haven't done so already. */ | |
2384 | if (isymbuf == NULL) | |
2385 | { | |
2386 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; | |
2387 | if (isymbuf == NULL) | |
2388 | isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, | |
2389 | symtab_hdr->sh_info, 0, | |
2390 | NULL, NULL, NULL); | |
2391 | if (isymbuf == NULL) | |
2392 | goto error_return; | |
2393 | } | |
0752970e | 2394 | |
6cdc0ccc AM |
2395 | isym = isymbuf + ELF32_R_SYM (irel->r_info); |
2396 | targetsec = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
0752970e NC |
2397 | } |
2398 | else | |
2399 | { | |
2400 | unsigned long indx; | |
2401 | struct elf_link_hash_entry *h; | |
2402 | ||
2403 | /* An external symbol. */ | |
2404 | indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info; | |
2405 | h = elf_sym_hashes (abfd)[indx]; | |
2406 | BFD_ASSERT (h != NULL); | |
2407 | if (h->root.type == bfd_link_hash_defined | |
2408 | || h->root.type == bfd_link_hash_defweak) | |
2409 | targetsec = h->root.u.def.section; | |
2410 | else | |
2411 | targetsec = NULL; | |
2412 | } | |
2413 | ||
2414 | bfd_put_32 (abfd, irel->r_offset + datasec->output_offset, p); | |
2415 | memset (p + 4, 0, 8); | |
2416 | if (targetsec != NULL) | |
f075ee0c | 2417 | strncpy ((char *) p + 4, targetsec->output_section->name, 8); |
0752970e | 2418 | } |
c3668558 | 2419 | |
6cdc0ccc AM |
2420 | if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf) |
2421 | free (isymbuf); | |
2422 | if (internal_relocs != NULL | |
2423 | && elf_section_data (datasec)->relocs != internal_relocs) | |
2424 | free (internal_relocs); | |
b34976b6 | 2425 | return TRUE; |
0752970e NC |
2426 | |
2427 | error_return: | |
6cdc0ccc AM |
2428 | if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf) |
2429 | free (isymbuf); | |
2430 | if (internal_relocs != NULL | |
2431 | && elf_section_data (datasec)->relocs != internal_relocs) | |
2432 | free (internal_relocs); | |
b34976b6 | 2433 | return FALSE; |
0752970e NC |
2434 | } |
2435 | ||
aa91b392 | 2436 | static enum elf_reloc_type_class |
f51e552e AM |
2437 | elf32_m68k_reloc_type_class (rela) |
2438 | const Elf_Internal_Rela *rela; | |
aa91b392 | 2439 | { |
f51e552e | 2440 | switch ((int) ELF32_R_TYPE (rela->r_info)) |
aa91b392 AS |
2441 | { |
2442 | case R_68K_RELATIVE: | |
2443 | return reloc_class_relative; | |
2444 | case R_68K_JMP_SLOT: | |
2445 | return reloc_class_plt; | |
2446 | case R_68K_COPY: | |
2447 | return reloc_class_copy; | |
2448 | default: | |
2449 | return reloc_class_normal; | |
2450 | } | |
2451 | } | |
2452 | ||
1715e0e3 AS |
2453 | /* Return address for Ith PLT stub in section PLT, for relocation REL |
2454 | or (bfd_vma) -1 if it should not be included. */ | |
2455 | ||
2456 | static bfd_vma | |
2457 | elf_m68k_plt_sym_val (bfd_vma i, const asection *plt, | |
2458 | const arelent *rel ATTRIBUTE_UNUSED) | |
2459 | { | |
cc3e26be | 2460 | return plt->vma + (i + 1) * elf_m68k_get_plt_info (plt->owner)->size; |
1715e0e3 AS |
2461 | } |
2462 | ||
252b5132 RH |
2463 | #define TARGET_BIG_SYM bfd_elf32_m68k_vec |
2464 | #define TARGET_BIG_NAME "elf32-m68k" | |
2465 | #define ELF_MACHINE_CODE EM_68K | |
2466 | #define ELF_MAXPAGESIZE 0x2000 | |
2467 | #define elf_backend_create_dynamic_sections \ | |
2468 | _bfd_elf_create_dynamic_sections | |
2469 | #define bfd_elf32_bfd_link_hash_table_create \ | |
2470 | elf_m68k_link_hash_table_create | |
c152c796 | 2471 | #define bfd_elf32_bfd_final_link bfd_elf_gc_common_final_link |
252b5132 RH |
2472 | |
2473 | #define elf_backend_check_relocs elf_m68k_check_relocs | |
cc3e26be RS |
2474 | #define elf_backend_always_size_sections \ |
2475 | elf_m68k_always_size_sections | |
252b5132 RH |
2476 | #define elf_backend_adjust_dynamic_symbol \ |
2477 | elf_m68k_adjust_dynamic_symbol | |
2478 | #define elf_backend_size_dynamic_sections \ | |
2479 | elf_m68k_size_dynamic_sections | |
74541ad4 | 2480 | #define elf_backend_init_index_section _bfd_elf_init_1_index_section |
252b5132 RH |
2481 | #define elf_backend_relocate_section elf_m68k_relocate_section |
2482 | #define elf_backend_finish_dynamic_symbol \ | |
2483 | elf_m68k_finish_dynamic_symbol | |
2484 | #define elf_backend_finish_dynamic_sections \ | |
2485 | elf_m68k_finish_dynamic_sections | |
2486 | #define elf_backend_gc_mark_hook elf_m68k_gc_mark_hook | |
2487 | #define elf_backend_gc_sweep_hook elf_m68k_gc_sweep_hook | |
9e1281c7 CM |
2488 | #define bfd_elf32_bfd_merge_private_bfd_data \ |
2489 | elf32_m68k_merge_private_bfd_data | |
2490 | #define bfd_elf32_bfd_set_private_flags \ | |
2491 | elf32_m68k_set_private_flags | |
2492 | #define bfd_elf32_bfd_print_private_bfd_data \ | |
2493 | elf32_m68k_print_private_bfd_data | |
aa91b392 | 2494 | #define elf_backend_reloc_type_class elf32_m68k_reloc_type_class |
1715e0e3 | 2495 | #define elf_backend_plt_sym_val elf_m68k_plt_sym_val |
266abb8f | 2496 | #define elf_backend_object_p elf32_m68k_object_p |
9e1281c7 | 2497 | |
252b5132 | 2498 | #define elf_backend_can_gc_sections 1 |
51b64d56 | 2499 | #define elf_backend_can_refcount 1 |
252b5132 RH |
2500 | #define elf_backend_want_got_plt 1 |
2501 | #define elf_backend_plt_readonly 1 | |
2502 | #define elf_backend_want_plt_sym 0 | |
2503 | #define elf_backend_got_header_size 12 | |
b491616a | 2504 | #define elf_backend_rela_normal 1 |
252b5132 RH |
2505 | |
2506 | #include "elf32-target.h" |