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252b5132 | 1 | /* Motorola 68k series support for 32-bit ELF |
3e829b4a | 2 | Copyright 1993, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003 |
7898deda | 3 | Free Software Foundation, Inc. |
252b5132 RH |
4 | |
5 | This file is part of BFD, the Binary File Descriptor library. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program; if not, write to the Free Software | |
19 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
20 | ||
21 | #include "bfd.h" | |
22 | #include "sysdep.h" | |
23 | #include "bfdlink.h" | |
24 | #include "libbfd.h" | |
25 | #include "elf-bfd.h" | |
26 | #include "elf/m68k.h" | |
27 | ||
28 | static reloc_howto_type *reloc_type_lookup | |
29 | PARAMS ((bfd *, bfd_reloc_code_real_type)); | |
30 | static void rtype_to_howto | |
947216bf | 31 | PARAMS ((bfd *, arelent *, Elf_Internal_Rela *)); |
252b5132 RH |
32 | static struct bfd_hash_entry *elf_m68k_link_hash_newfunc |
33 | PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *)); | |
34 | static struct bfd_link_hash_table *elf_m68k_link_hash_table_create | |
35 | PARAMS ((bfd *)); | |
b34976b6 | 36 | static bfd_boolean elf_m68k_check_relocs |
252b5132 RH |
37 | PARAMS ((bfd *, struct bfd_link_info *, asection *, |
38 | const Elf_Internal_Rela *)); | |
39 | static asection *elf_m68k_gc_mark_hook | |
1e2f5b6e | 40 | PARAMS ((asection *, struct bfd_link_info *, Elf_Internal_Rela *, |
252b5132 | 41 | struct elf_link_hash_entry *, Elf_Internal_Sym *)); |
b34976b6 | 42 | static bfd_boolean elf_m68k_gc_sweep_hook |
252b5132 RH |
43 | PARAMS ((bfd *, struct bfd_link_info *, asection *, |
44 | const Elf_Internal_Rela *)); | |
b34976b6 | 45 | static bfd_boolean elf_m68k_adjust_dynamic_symbol |
252b5132 | 46 | PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *)); |
b34976b6 | 47 | static bfd_boolean elf_m68k_size_dynamic_sections |
252b5132 | 48 | PARAMS ((bfd *, struct bfd_link_info *)); |
b34976b6 | 49 | static bfd_boolean elf_m68k_relocate_section |
252b5132 RH |
50 | PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, |
51 | Elf_Internal_Rela *, Elf_Internal_Sym *, asection **)); | |
b34976b6 | 52 | static bfd_boolean elf_m68k_finish_dynamic_symbol |
252b5132 RH |
53 | PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *, |
54 | Elf_Internal_Sym *)); | |
b34976b6 | 55 | static bfd_boolean elf_m68k_finish_dynamic_sections |
252b5132 RH |
56 | PARAMS ((bfd *, struct bfd_link_info *)); |
57 | ||
b34976b6 | 58 | static bfd_boolean elf32_m68k_set_private_flags |
9e1281c7 | 59 | PARAMS ((bfd *, flagword)); |
b34976b6 | 60 | static bfd_boolean elf32_m68k_merge_private_bfd_data |
9e1281c7 | 61 | PARAMS ((bfd *, bfd *)); |
b34976b6 | 62 | static bfd_boolean elf32_m68k_print_private_bfd_data |
9e1281c7 | 63 | PARAMS ((bfd *, PTR)); |
aa91b392 | 64 | static enum elf_reloc_type_class elf32_m68k_reloc_type_class |
f51e552e | 65 | PARAMS ((const Elf_Internal_Rela *)); |
9e1281c7 | 66 | |
252b5132 | 67 | static reloc_howto_type howto_table[] = { |
b34976b6 AM |
68 | HOWTO(R_68K_NONE, 0, 0, 0, FALSE,0, complain_overflow_dont, bfd_elf_generic_reloc, "R_68K_NONE", FALSE, 0, 0x00000000,FALSE), |
69 | HOWTO(R_68K_32, 0, 2,32, FALSE,0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_32", FALSE, 0, 0xffffffff,FALSE), | |
70 | HOWTO(R_68K_16, 0, 1,16, FALSE,0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_16", FALSE, 0, 0x0000ffff,FALSE), | |
71 | HOWTO(R_68K_8, 0, 0, 8, FALSE,0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_8", FALSE, 0, 0x000000ff,FALSE), | |
72 | HOWTO(R_68K_PC32, 0, 2,32, TRUE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_PC32", FALSE, 0, 0xffffffff,TRUE), | |
73 | HOWTO(R_68K_PC16, 0, 1,16, TRUE, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_PC16", FALSE, 0, 0x0000ffff,TRUE), | |
74 | HOWTO(R_68K_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_PC8", FALSE, 0, 0x000000ff,TRUE), | |
75 | HOWTO(R_68K_GOT32, 0, 2,32, TRUE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_GOT32", FALSE, 0, 0xffffffff,TRUE), | |
76 | HOWTO(R_68K_GOT16, 0, 1,16, TRUE, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_GOT16", FALSE, 0, 0x0000ffff,TRUE), | |
77 | HOWTO(R_68K_GOT8, 0, 0, 8, TRUE, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_GOT8", FALSE, 0, 0x000000ff,TRUE), | |
78 | HOWTO(R_68K_GOT32O, 0, 2,32, FALSE,0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_GOT32O", FALSE, 0, 0xffffffff,FALSE), | |
79 | HOWTO(R_68K_GOT16O, 0, 1,16, FALSE,0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_GOT16O", FALSE, 0, 0x0000ffff,FALSE), | |
80 | HOWTO(R_68K_GOT8O, 0, 0, 8, FALSE,0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_GOT8O", FALSE, 0, 0x000000ff,FALSE), | |
81 | HOWTO(R_68K_PLT32, 0, 2,32, TRUE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_PLT32", FALSE, 0, 0xffffffff,TRUE), | |
82 | HOWTO(R_68K_PLT16, 0, 1,16, TRUE, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_PLT16", FALSE, 0, 0x0000ffff,TRUE), | |
83 | HOWTO(R_68K_PLT8, 0, 0, 8, TRUE, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_PLT8", FALSE, 0, 0x000000ff,TRUE), | |
84 | HOWTO(R_68K_PLT32O, 0, 2,32, FALSE,0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_PLT32O", FALSE, 0, 0xffffffff,FALSE), | |
85 | HOWTO(R_68K_PLT16O, 0, 1,16, FALSE,0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_PLT16O", FALSE, 0, 0x0000ffff,FALSE), | |
86 | HOWTO(R_68K_PLT8O, 0, 0, 8, FALSE,0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_PLT8O", FALSE, 0, 0x000000ff,FALSE), | |
87 | HOWTO(R_68K_COPY, 0, 0, 0, FALSE,0, complain_overflow_dont, bfd_elf_generic_reloc, "R_68K_COPY", FALSE, 0, 0xffffffff,FALSE), | |
88 | 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), | |
89 | 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), | |
90 | HOWTO(R_68K_RELATIVE, 0, 2,32, FALSE,0, complain_overflow_dont, bfd_elf_generic_reloc, "R_68K_RELATIVE", FALSE, 0, 0xffffffff,FALSE), | |
252b5132 RH |
91 | /* GNU extension to record C++ vtable hierarchy */ |
92 | HOWTO (R_68K_GNU_VTINHERIT, /* type */ | |
93 | 0, /* rightshift */ | |
94 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
95 | 0, /* bitsize */ | |
b34976b6 | 96 | FALSE, /* pc_relative */ |
252b5132 RH |
97 | 0, /* bitpos */ |
98 | complain_overflow_dont, /* complain_on_overflow */ | |
99 | NULL, /* special_function */ | |
100 | "R_68K_GNU_VTINHERIT", /* name */ | |
b34976b6 | 101 | FALSE, /* partial_inplace */ |
252b5132 RH |
102 | 0, /* src_mask */ |
103 | 0, /* dst_mask */ | |
b34976b6 | 104 | FALSE), |
252b5132 RH |
105 | /* GNU extension to record C++ vtable member usage */ |
106 | HOWTO (R_68K_GNU_VTENTRY, /* type */ | |
107 | 0, /* rightshift */ | |
108 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
109 | 0, /* bitsize */ | |
b34976b6 | 110 | FALSE, /* pc_relative */ |
252b5132 RH |
111 | 0, /* bitpos */ |
112 | complain_overflow_dont, /* complain_on_overflow */ | |
113 | _bfd_elf_rel_vtable_reloc_fn, /* special_function */ | |
114 | "R_68K_GNU_VTENTRY", /* name */ | |
b34976b6 | 115 | FALSE, /* partial_inplace */ |
252b5132 RH |
116 | 0, /* src_mask */ |
117 | 0, /* dst_mask */ | |
b34976b6 | 118 | FALSE), |
252b5132 RH |
119 | }; |
120 | ||
121 | static void | |
122 | rtype_to_howto (abfd, cache_ptr, dst) | |
121089cb | 123 | bfd *abfd ATTRIBUTE_UNUSED; |
252b5132 RH |
124 | arelent *cache_ptr; |
125 | Elf_Internal_Rela *dst; | |
126 | { | |
127 | BFD_ASSERT (ELF32_R_TYPE(dst->r_info) < (unsigned int) R_68K_max); | |
128 | cache_ptr->howto = &howto_table[ELF32_R_TYPE(dst->r_info)]; | |
129 | } | |
130 | ||
131 | #define elf_info_to_howto rtype_to_howto | |
132 | ||
133 | static const struct | |
134 | { | |
135 | bfd_reloc_code_real_type bfd_val; | |
136 | int elf_val; | |
137 | } reloc_map[] = { | |
138 | { BFD_RELOC_NONE, R_68K_NONE }, | |
139 | { BFD_RELOC_32, R_68K_32 }, | |
140 | { BFD_RELOC_16, R_68K_16 }, | |
141 | { BFD_RELOC_8, R_68K_8 }, | |
142 | { BFD_RELOC_32_PCREL, R_68K_PC32 }, | |
143 | { BFD_RELOC_16_PCREL, R_68K_PC16 }, | |
144 | { BFD_RELOC_8_PCREL, R_68K_PC8 }, | |
145 | { BFD_RELOC_32_GOT_PCREL, R_68K_GOT32 }, | |
146 | { BFD_RELOC_16_GOT_PCREL, R_68K_GOT16 }, | |
147 | { BFD_RELOC_8_GOT_PCREL, R_68K_GOT8 }, | |
148 | { BFD_RELOC_32_GOTOFF, R_68K_GOT32O }, | |
149 | { BFD_RELOC_16_GOTOFF, R_68K_GOT16O }, | |
150 | { BFD_RELOC_8_GOTOFF, R_68K_GOT8O }, | |
151 | { BFD_RELOC_32_PLT_PCREL, R_68K_PLT32 }, | |
152 | { BFD_RELOC_16_PLT_PCREL, R_68K_PLT16 }, | |
153 | { BFD_RELOC_8_PLT_PCREL, R_68K_PLT8 }, | |
154 | { BFD_RELOC_32_PLTOFF, R_68K_PLT32O }, | |
155 | { BFD_RELOC_16_PLTOFF, R_68K_PLT16O }, | |
156 | { BFD_RELOC_8_PLTOFF, R_68K_PLT8O }, | |
157 | { BFD_RELOC_NONE, R_68K_COPY }, | |
158 | { BFD_RELOC_68K_GLOB_DAT, R_68K_GLOB_DAT }, | |
159 | { BFD_RELOC_68K_JMP_SLOT, R_68K_JMP_SLOT }, | |
160 | { BFD_RELOC_68K_RELATIVE, R_68K_RELATIVE }, | |
161 | { BFD_RELOC_CTOR, R_68K_32 }, | |
162 | { BFD_RELOC_VTABLE_INHERIT, R_68K_GNU_VTINHERIT }, | |
163 | { BFD_RELOC_VTABLE_ENTRY, R_68K_GNU_VTENTRY }, | |
164 | }; | |
165 | ||
166 | static reloc_howto_type * | |
167 | reloc_type_lookup (abfd, code) | |
121089cb | 168 | bfd *abfd ATTRIBUTE_UNUSED; |
252b5132 RH |
169 | bfd_reloc_code_real_type code; |
170 | { | |
171 | unsigned int i; | |
172 | for (i = 0; i < sizeof (reloc_map) / sizeof (reloc_map[0]); i++) | |
173 | { | |
174 | if (reloc_map[i].bfd_val == code) | |
175 | return &howto_table[reloc_map[i].elf_val]; | |
176 | } | |
177 | return 0; | |
178 | } | |
179 | ||
180 | #define bfd_elf32_bfd_reloc_type_lookup reloc_type_lookup | |
181 | #define ELF_ARCH bfd_arch_m68k | |
182 | /* end code generated by elf.el */ | |
252b5132 RH |
183 | \f |
184 | /* Functions for the m68k ELF linker. */ | |
185 | ||
186 | /* The name of the dynamic interpreter. This is put in the .interp | |
187 | section. */ | |
188 | ||
189 | #define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1" | |
190 | ||
191 | /* The size in bytes of an entry in the procedure linkage table. */ | |
192 | ||
193 | #define PLT_ENTRY_SIZE 20 | |
194 | ||
195 | /* The first entry in a procedure linkage table looks like this. See | |
196 | the SVR4 ABI m68k supplement to see how this works. */ | |
197 | ||
198 | static const bfd_byte elf_m68k_plt0_entry[PLT_ENTRY_SIZE] = | |
199 | { | |
200 | 0x2f, 0x3b, 0x01, 0x70, /* move.l (%pc,addr),-(%sp) */ | |
201 | 0, 0, 0, 0, /* replaced with offset to .got + 4. */ | |
202 | 0x4e, 0xfb, 0x01, 0x71, /* jmp ([%pc,addr]) */ | |
203 | 0, 0, 0, 0, /* replaced with offset to .got + 8. */ | |
204 | 0, 0, 0, 0 /* pad out to 20 bytes. */ | |
205 | }; | |
206 | ||
207 | /* Subsequent entries in a procedure linkage table look like this. */ | |
208 | ||
209 | static const bfd_byte elf_m68k_plt_entry[PLT_ENTRY_SIZE] = | |
210 | { | |
211 | 0x4e, 0xfb, 0x01, 0x71, /* jmp ([%pc,symbol@GOTPC]) */ | |
212 | 0, 0, 0, 0, /* replaced with offset to symbol's .got entry. */ | |
213 | 0x2f, 0x3c, /* move.l #offset,-(%sp) */ | |
214 | 0, 0, 0, 0, /* replaced with offset into relocation table. */ | |
215 | 0x60, 0xff, /* bra.l .plt */ | |
216 | 0, 0, 0, 0 /* replaced with offset to start of .plt. */ | |
217 | }; | |
218 | ||
9e1281c7 CM |
219 | #define CPU32_FLAG(abfd) (elf_elfheader (abfd)->e_flags & EF_CPU32) |
220 | ||
221 | #define PLT_CPU32_ENTRY_SIZE 24 | |
222 | /* Procedure linkage table entries for the cpu32 */ | |
223 | static const bfd_byte elf_cpu32_plt0_entry[PLT_CPU32_ENTRY_SIZE] = | |
224 | { | |
6091b433 | 225 | 0x2f, 0x3b, 0x01, 0x70, /* move.l (%pc,addr),-(%sp) */ |
9e1281c7 | 226 | 0, 0, 0, 0, /* replaced with offset to .got + 4. */ |
6091b433 | 227 | 0x22, 0x7b, 0x01, 0x70, /* moveal %pc@(0xc), %a1 */ |
c3668558 | 228 | 0, 0, 0, 0, /* replace with offset to .got +8. */ |
6091b433 | 229 | 0x4e, 0xd1, /* jmp %a1@ */ |
9e1281c7 CM |
230 | 0, 0, 0, 0, /* pad out to 24 bytes. */ |
231 | 0, 0 | |
232 | }; | |
233 | ||
234 | static const bfd_byte elf_cpu32_plt_entry[PLT_CPU32_ENTRY_SIZE] = | |
235 | { | |
1ca42bad | 236 | 0x22, 0x7b, 0x01, 0x70, /* moveal %pc@(0xc), %a1 */ |
9e1281c7 | 237 | 0, 0, 0, 0, /* replaced with offset to symbol's .got entry. */ |
1ca42bad | 238 | 0x4e, 0xd1, /* jmp %a1@ */ |
9e1281c7 CM |
239 | 0x2f, 0x3c, /* move.l #offset,-(%sp) */ |
240 | 0, 0, 0, 0, /* replaced with offset into relocation table. */ | |
241 | 0x60, 0xff, /* bra.l .plt */ | |
242 | 0, 0, 0, 0, /* replaced with offset to start of .plt. */ | |
243 | 0, 0 | |
244 | }; | |
245 | ||
252b5132 RH |
246 | /* The m68k linker needs to keep track of the number of relocs that it |
247 | decides to copy in check_relocs for each symbol. This is so that it | |
248 | can discard PC relative relocs if it doesn't need them when linking | |
249 | with -Bsymbolic. We store the information in a field extending the | |
250 | regular ELF linker hash table. */ | |
251 | ||
252 | /* This structure keeps track of the number of PC relative relocs we have | |
253 | copied for a given symbol. */ | |
254 | ||
255 | struct elf_m68k_pcrel_relocs_copied | |
256 | { | |
257 | /* Next section. */ | |
258 | struct elf_m68k_pcrel_relocs_copied *next; | |
259 | /* A section in dynobj. */ | |
260 | asection *section; | |
261 | /* Number of relocs copied in this section. */ | |
262 | bfd_size_type count; | |
263 | }; | |
264 | ||
265 | /* m68k ELF linker hash entry. */ | |
266 | ||
267 | struct elf_m68k_link_hash_entry | |
268 | { | |
269 | struct elf_link_hash_entry root; | |
270 | ||
271 | /* Number of PC relative relocs copied for this symbol. */ | |
272 | struct elf_m68k_pcrel_relocs_copied *pcrel_relocs_copied; | |
273 | }; | |
274 | ||
275 | /* m68k ELF linker hash table. */ | |
276 | ||
277 | struct elf_m68k_link_hash_table | |
278 | { | |
279 | struct elf_link_hash_table root; | |
b6152c34 AS |
280 | |
281 | /* Small local sym to section mapping cache. */ | |
282 | struct sym_sec_cache sym_sec; | |
252b5132 RH |
283 | }; |
284 | ||
285 | /* Declare this now that the above structures are defined. */ | |
286 | ||
b34976b6 | 287 | static bfd_boolean elf_m68k_discard_copies |
252b5132 RH |
288 | PARAMS ((struct elf_m68k_link_hash_entry *, PTR)); |
289 | ||
290 | /* Traverse an m68k ELF linker hash table. */ | |
291 | ||
292 | #define elf_m68k_link_hash_traverse(table, func, info) \ | |
293 | (elf_link_hash_traverse \ | |
294 | (&(table)->root, \ | |
b34976b6 | 295 | (bfd_boolean (*) PARAMS ((struct elf_link_hash_entry *, PTR))) (func), \ |
252b5132 RH |
296 | (info))) |
297 | ||
298 | /* Get the m68k ELF linker hash table from a link_info structure. */ | |
299 | ||
300 | #define elf_m68k_hash_table(p) \ | |
301 | ((struct elf_m68k_link_hash_table *) (p)->hash) | |
302 | ||
303 | /* Create an entry in an m68k ELF linker hash table. */ | |
304 | ||
305 | static struct bfd_hash_entry * | |
306 | elf_m68k_link_hash_newfunc (entry, table, string) | |
307 | struct bfd_hash_entry *entry; | |
308 | struct bfd_hash_table *table; | |
309 | const char *string; | |
310 | { | |
311 | struct elf_m68k_link_hash_entry *ret = | |
312 | (struct elf_m68k_link_hash_entry *) entry; | |
313 | ||
314 | /* Allocate the structure if it has not already been allocated by a | |
315 | subclass. */ | |
316 | if (ret == (struct elf_m68k_link_hash_entry *) NULL) | |
317 | ret = ((struct elf_m68k_link_hash_entry *) | |
318 | bfd_hash_allocate (table, | |
319 | sizeof (struct elf_m68k_link_hash_entry))); | |
320 | if (ret == (struct elf_m68k_link_hash_entry *) NULL) | |
321 | return (struct bfd_hash_entry *) ret; | |
322 | ||
323 | /* Call the allocation method of the superclass. */ | |
324 | ret = ((struct elf_m68k_link_hash_entry *) | |
325 | _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret, | |
326 | table, string)); | |
327 | if (ret != (struct elf_m68k_link_hash_entry *) NULL) | |
328 | { | |
329 | ret->pcrel_relocs_copied = NULL; | |
330 | } | |
331 | ||
332 | return (struct bfd_hash_entry *) ret; | |
333 | } | |
334 | ||
335 | /* Create an m68k ELF linker hash table. */ | |
336 | ||
337 | static struct bfd_link_hash_table * | |
338 | elf_m68k_link_hash_table_create (abfd) | |
339 | bfd *abfd; | |
340 | { | |
341 | struct elf_m68k_link_hash_table *ret; | |
dc810e39 | 342 | bfd_size_type amt = sizeof (struct elf_m68k_link_hash_table); |
252b5132 | 343 | |
e2d34d7d | 344 | ret = (struct elf_m68k_link_hash_table *) bfd_malloc (amt); |
252b5132 RH |
345 | if (ret == (struct elf_m68k_link_hash_table *) NULL) |
346 | return NULL; | |
347 | ||
348 | if (! _bfd_elf_link_hash_table_init (&ret->root, abfd, | |
349 | elf_m68k_link_hash_newfunc)) | |
350 | { | |
e2d34d7d | 351 | free (ret); |
252b5132 RH |
352 | return NULL; |
353 | } | |
354 | ||
b6152c34 AS |
355 | ret->sym_sec.abfd = NULL; |
356 | ||
252b5132 RH |
357 | return &ret->root.root; |
358 | } | |
359 | ||
9e1281c7 | 360 | /* Keep m68k-specific flags in the ELF header */ |
b34976b6 | 361 | static bfd_boolean |
9e1281c7 CM |
362 | elf32_m68k_set_private_flags (abfd, flags) |
363 | bfd *abfd; | |
364 | flagword flags; | |
365 | { | |
366 | elf_elfheader (abfd)->e_flags = flags; | |
b34976b6 AM |
367 | elf_flags_init (abfd) = TRUE; |
368 | return TRUE; | |
9e1281c7 CM |
369 | } |
370 | ||
9e1281c7 CM |
371 | /* Merge backend specific data from an object file to the output |
372 | object file when linking. */ | |
b34976b6 | 373 | static bfd_boolean |
9e1281c7 CM |
374 | elf32_m68k_merge_private_bfd_data (ibfd, obfd) |
375 | bfd *ibfd; | |
376 | bfd *obfd; | |
377 | { | |
378 | flagword out_flags; | |
379 | flagword in_flags; | |
380 | ||
381 | if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour | |
382 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) | |
b34976b6 | 383 | return TRUE; |
9e1281c7 CM |
384 | |
385 | in_flags = elf_elfheader (ibfd)->e_flags; | |
386 | out_flags = elf_elfheader (obfd)->e_flags; | |
387 | ||
388 | if (!elf_flags_init (obfd)) | |
389 | { | |
b34976b6 | 390 | elf_flags_init (obfd) = TRUE; |
9e1281c7 CM |
391 | elf_elfheader (obfd)->e_flags = in_flags; |
392 | } | |
393 | ||
b34976b6 | 394 | return TRUE; |
9e1281c7 CM |
395 | } |
396 | ||
397 | /* Display the flags field */ | |
b34976b6 | 398 | static bfd_boolean |
9e1281c7 CM |
399 | elf32_m68k_print_private_bfd_data (abfd, ptr) |
400 | bfd *abfd; | |
401 | PTR ptr; | |
402 | { | |
403 | FILE *file = (FILE *) ptr; | |
404 | ||
405 | BFD_ASSERT (abfd != NULL && ptr != NULL); | |
406 | ||
407 | /* Print normal ELF private data. */ | |
408 | _bfd_elf_print_private_bfd_data (abfd, ptr); | |
409 | ||
410 | /* Ignore init flag - it may not be set, despite the flags field containing valid data. */ | |
411 | ||
412 | /* xgettext:c-format */ | |
517662d4 | 413 | fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags); |
9e1281c7 CM |
414 | |
415 | if (elf_elfheader (abfd)->e_flags & EF_CPU32) | |
517662d4 | 416 | fprintf (file, _(" [cpu32]")); |
9e1281c7 | 417 | |
76f57f3a | 418 | if (elf_elfheader (abfd)->e_flags & EF_M68000) |
428d0de3 | 419 | fprintf (file, _(" [m68000]")); |
76f57f3a | 420 | |
9e1281c7 CM |
421 | fputc ('\n', file); |
422 | ||
b34976b6 | 423 | return TRUE; |
9e1281c7 | 424 | } |
252b5132 RH |
425 | /* Look through the relocs for a section during the first phase, and |
426 | allocate space in the global offset table or procedure linkage | |
427 | table. */ | |
428 | ||
b34976b6 | 429 | static bfd_boolean |
252b5132 RH |
430 | elf_m68k_check_relocs (abfd, info, sec, relocs) |
431 | bfd *abfd; | |
432 | struct bfd_link_info *info; | |
433 | asection *sec; | |
434 | const Elf_Internal_Rela *relocs; | |
435 | { | |
436 | bfd *dynobj; | |
437 | Elf_Internal_Shdr *symtab_hdr; | |
438 | struct elf_link_hash_entry **sym_hashes; | |
439 | bfd_signed_vma *local_got_refcounts; | |
440 | const Elf_Internal_Rela *rel; | |
441 | const Elf_Internal_Rela *rel_end; | |
442 | asection *sgot; | |
443 | asection *srelgot; | |
444 | asection *sreloc; | |
445 | ||
446 | if (info->relocateable) | |
b34976b6 | 447 | return TRUE; |
252b5132 RH |
448 | |
449 | dynobj = elf_hash_table (info)->dynobj; | |
450 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
451 | sym_hashes = elf_sym_hashes (abfd); | |
452 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
453 | ||
454 | sgot = NULL; | |
455 | srelgot = NULL; | |
456 | sreloc = NULL; | |
457 | ||
458 | rel_end = relocs + sec->reloc_count; | |
459 | for (rel = relocs; rel < rel_end; rel++) | |
460 | { | |
461 | unsigned long r_symndx; | |
462 | struct elf_link_hash_entry *h; | |
463 | ||
464 | r_symndx = ELF32_R_SYM (rel->r_info); | |
465 | ||
466 | if (r_symndx < symtab_hdr->sh_info) | |
467 | h = NULL; | |
468 | else | |
469 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
470 | ||
471 | switch (ELF32_R_TYPE (rel->r_info)) | |
472 | { | |
473 | case R_68K_GOT8: | |
474 | case R_68K_GOT16: | |
475 | case R_68K_GOT32: | |
476 | if (h != NULL | |
477 | && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) | |
478 | break; | |
479 | /* Fall through. */ | |
480 | case R_68K_GOT8O: | |
481 | case R_68K_GOT16O: | |
482 | case R_68K_GOT32O: | |
483 | /* This symbol requires a global offset table entry. */ | |
484 | ||
485 | if (dynobj == NULL) | |
486 | { | |
487 | /* Create the .got section. */ | |
488 | elf_hash_table (info)->dynobj = dynobj = abfd; | |
489 | if (!_bfd_elf_create_got_section (dynobj, info)) | |
b34976b6 | 490 | return FALSE; |
252b5132 RH |
491 | } |
492 | ||
493 | if (sgot == NULL) | |
494 | { | |
495 | sgot = bfd_get_section_by_name (dynobj, ".got"); | |
496 | BFD_ASSERT (sgot != NULL); | |
497 | } | |
498 | ||
499 | if (srelgot == NULL | |
500 | && (h != NULL || info->shared)) | |
501 | { | |
502 | srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); | |
503 | if (srelgot == NULL) | |
504 | { | |
505 | srelgot = bfd_make_section (dynobj, ".rela.got"); | |
506 | if (srelgot == NULL | |
507 | || !bfd_set_section_flags (dynobj, srelgot, | |
508 | (SEC_ALLOC | |
509 | | SEC_LOAD | |
510 | | SEC_HAS_CONTENTS | |
511 | | SEC_IN_MEMORY | |
512 | | SEC_LINKER_CREATED | |
513 | | SEC_READONLY)) | |
514 | || !bfd_set_section_alignment (dynobj, srelgot, 2)) | |
b34976b6 | 515 | return FALSE; |
252b5132 RH |
516 | } |
517 | } | |
518 | ||
519 | if (h != NULL) | |
520 | { | |
51b64d56 | 521 | if (h->got.refcount == 0) |
252b5132 | 522 | { |
252b5132 | 523 | /* Make sure this symbol is output as a dynamic symbol. */ |
b6152c34 AS |
524 | if (h->dynindx == -1 |
525 | && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) | |
252b5132 RH |
526 | { |
527 | if (!bfd_elf32_link_record_dynamic_symbol (info, h)) | |
b34976b6 | 528 | return FALSE; |
252b5132 RH |
529 | } |
530 | ||
531 | /* Allocate space in the .got section. */ | |
532 | sgot->_raw_size += 4; | |
533 | /* Allocate relocation space. */ | |
534 | srelgot->_raw_size += sizeof (Elf32_External_Rela); | |
535 | } | |
51b64d56 | 536 | h->got.refcount++; |
252b5132 RH |
537 | } |
538 | else | |
539 | { | |
540 | /* This is a global offset table entry for a local symbol. */ | |
541 | if (local_got_refcounts == NULL) | |
542 | { | |
dc810e39 | 543 | bfd_size_type size; |
252b5132 | 544 | |
dc810e39 AM |
545 | size = symtab_hdr->sh_info; |
546 | size *= sizeof (bfd_signed_vma); | |
252b5132 | 547 | local_got_refcounts = ((bfd_signed_vma *) |
51b64d56 | 548 | bfd_zalloc (abfd, size)); |
252b5132 | 549 | if (local_got_refcounts == NULL) |
b34976b6 | 550 | return FALSE; |
252b5132 | 551 | elf_local_got_refcounts (abfd) = local_got_refcounts; |
252b5132 | 552 | } |
51b64d56 | 553 | if (local_got_refcounts[r_symndx] == 0) |
252b5132 | 554 | { |
252b5132 RH |
555 | sgot->_raw_size += 4; |
556 | if (info->shared) | |
557 | { | |
558 | /* If we are generating a shared object, we need to | |
559 | output a R_68K_RELATIVE reloc so that the dynamic | |
560 | linker can adjust this GOT entry. */ | |
561 | srelgot->_raw_size += sizeof (Elf32_External_Rela); | |
562 | } | |
563 | } | |
51b64d56 | 564 | local_got_refcounts[r_symndx]++; |
252b5132 RH |
565 | } |
566 | break; | |
567 | ||
568 | case R_68K_PLT8: | |
569 | case R_68K_PLT16: | |
570 | case R_68K_PLT32: | |
571 | /* This symbol requires a procedure linkage table entry. We | |
572 | actually build the entry in adjust_dynamic_symbol, | |
573 | because this might be a case of linking PIC code which is | |
574 | never referenced by a dynamic object, in which case we | |
575 | don't need to generate a procedure linkage table entry | |
576 | after all. */ | |
577 | ||
578 | /* If this is a local symbol, we resolve it directly without | |
579 | creating a procedure linkage table entry. */ | |
580 | if (h == NULL) | |
581 | continue; | |
582 | ||
583 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; | |
51b64d56 | 584 | h->plt.refcount++; |
252b5132 RH |
585 | break; |
586 | ||
587 | case R_68K_PLT8O: | |
588 | case R_68K_PLT16O: | |
589 | case R_68K_PLT32O: | |
590 | /* This symbol requires a procedure linkage table entry. */ | |
591 | ||
592 | if (h == NULL) | |
593 | { | |
594 | /* It does not make sense to have this relocation for a | |
595 | local symbol. FIXME: does it? How to handle it if | |
596 | it does make sense? */ | |
597 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 598 | return FALSE; |
252b5132 RH |
599 | } |
600 | ||
601 | /* Make sure this symbol is output as a dynamic symbol. */ | |
b6152c34 AS |
602 | if (h->dynindx == -1 |
603 | && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) | |
252b5132 RH |
604 | { |
605 | if (!bfd_elf32_link_record_dynamic_symbol (info, h)) | |
b34976b6 | 606 | return FALSE; |
252b5132 RH |
607 | } |
608 | ||
609 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; | |
51b64d56 | 610 | h->plt.refcount++; |
252b5132 RH |
611 | break; |
612 | ||
613 | case R_68K_PC8: | |
614 | case R_68K_PC16: | |
615 | case R_68K_PC32: | |
616 | /* If we are creating a shared library and this is not a local | |
617 | symbol, we need to copy the reloc into the shared library. | |
618 | However when linking with -Bsymbolic and this is a global | |
619 | symbol which is defined in an object we are including in the | |
620 | link (i.e., DEF_REGULAR is set), then we can resolve the | |
621 | reloc directly. At this point we have not seen all the input | |
622 | files, so it is possible that DEF_REGULAR is not set now but | |
623 | will be set later (it is never cleared). We account for that | |
624 | possibility below by storing information in the | |
625 | pcrel_relocs_copied field of the hash table entry. */ | |
626 | if (!(info->shared | |
627 | && (sec->flags & SEC_ALLOC) != 0 | |
628 | && h != NULL | |
629 | && (!info->symbolic | |
b6152c34 | 630 | || h->root.type == bfd_link_hash_defweak |
252b5132 RH |
631 | || (h->elf_link_hash_flags |
632 | & ELF_LINK_HASH_DEF_REGULAR) == 0))) | |
633 | { | |
634 | if (h != NULL) | |
635 | { | |
636 | /* Make sure a plt entry is created for this symbol if | |
637 | it turns out to be a function defined by a dynamic | |
638 | object. */ | |
51b64d56 | 639 | h->plt.refcount++; |
252b5132 RH |
640 | } |
641 | break; | |
642 | } | |
643 | /* Fall through. */ | |
644 | case R_68K_8: | |
645 | case R_68K_16: | |
646 | case R_68K_32: | |
647 | if (h != NULL) | |
648 | { | |
649 | /* Make sure a plt entry is created for this symbol if it | |
650 | turns out to be a function defined by a dynamic object. */ | |
51b64d56 | 651 | h->plt.refcount++; |
252b5132 RH |
652 | } |
653 | ||
654 | /* If we are creating a shared library, we need to copy the | |
655 | reloc into the shared library. */ | |
656 | if (info->shared | |
657 | && (sec->flags & SEC_ALLOC) != 0) | |
658 | { | |
659 | /* When creating a shared object, we must copy these | |
660 | reloc types into the output file. We create a reloc | |
661 | section in dynobj and make room for this reloc. */ | |
662 | if (sreloc == NULL) | |
663 | { | |
664 | const char *name; | |
665 | ||
666 | name = (bfd_elf_string_from_elf_section | |
667 | (abfd, | |
668 | elf_elfheader (abfd)->e_shstrndx, | |
669 | elf_section_data (sec)->rel_hdr.sh_name)); | |
670 | if (name == NULL) | |
b34976b6 | 671 | return FALSE; |
252b5132 RH |
672 | |
673 | BFD_ASSERT (strncmp (name, ".rela", 5) == 0 | |
674 | && strcmp (bfd_get_section_name (abfd, sec), | |
675 | name + 5) == 0); | |
676 | ||
677 | sreloc = bfd_get_section_by_name (dynobj, name); | |
678 | if (sreloc == NULL) | |
679 | { | |
680 | sreloc = bfd_make_section (dynobj, name); | |
681 | if (sreloc == NULL | |
682 | || !bfd_set_section_flags (dynobj, sreloc, | |
683 | (SEC_ALLOC | |
684 | | SEC_LOAD | |
685 | | SEC_HAS_CONTENTS | |
686 | | SEC_IN_MEMORY | |
687 | | SEC_LINKER_CREATED | |
688 | | SEC_READONLY)) | |
689 | || !bfd_set_section_alignment (dynobj, sreloc, 2)) | |
b34976b6 | 690 | return FALSE; |
252b5132 RH |
691 | } |
692 | } | |
693 | ||
3e829b4a AS |
694 | if (sec->flags & SEC_READONLY |
695 | /* Don't set DF_TEXTREL yet for PC relative | |
696 | relocations, they might be discarded later. */ | |
697 | && !(ELF32_R_TYPE (rel->r_info) == R_68K_PC8 | |
698 | || ELF32_R_TYPE (rel->r_info) == R_68K_PC16 | |
699 | || ELF32_R_TYPE (rel->r_info) == R_68K_PC32)) | |
700 | info->flags |= DF_TEXTREL; | |
701 | ||
252b5132 RH |
702 | sreloc->_raw_size += sizeof (Elf32_External_Rela); |
703 | ||
b6152c34 AS |
704 | /* We count the number of PC relative relocations we have |
705 | entered for this symbol, so that we can discard them | |
706 | again if, in the -Bsymbolic case, the symbol is later | |
707 | defined by a regular object, or, in the normal shared | |
708 | case, the symbol is forced to be local. Note that this | |
709 | function is only called if we are using an m68kelf linker | |
710 | hash table, which means that h is really a pointer to an | |
252b5132 | 711 | elf_m68k_link_hash_entry. */ |
b6152c34 AS |
712 | if (ELF32_R_TYPE (rel->r_info) == R_68K_PC8 |
713 | || ELF32_R_TYPE (rel->r_info) == R_68K_PC16 | |
714 | || ELF32_R_TYPE (rel->r_info) == R_68K_PC32) | |
252b5132 | 715 | { |
252b5132 | 716 | struct elf_m68k_pcrel_relocs_copied *p; |
b6152c34 AS |
717 | struct elf_m68k_pcrel_relocs_copied **head; |
718 | ||
719 | if (h != NULL) | |
720 | { | |
721 | struct elf_m68k_link_hash_entry *eh | |
722 | = (struct elf_m68k_link_hash_entry *) h; | |
723 | head = &eh->pcrel_relocs_copied; | |
724 | } | |
725 | else | |
726 | { | |
727 | asection *s; | |
728 | s = (bfd_section_from_r_symndx | |
729 | (abfd, &elf_m68k_hash_table (info)->sym_sec, | |
730 | sec, r_symndx)); | |
731 | if (s == NULL) | |
732 | return FALSE; | |
252b5132 | 733 | |
b6152c34 AS |
734 | head = ((struct elf_m68k_pcrel_relocs_copied **) |
735 | &elf_section_data (s)->local_dynrel); | |
736 | } | |
252b5132 | 737 | |
b6152c34 | 738 | for (p = *head; p != NULL; p = p->next) |
252b5132 RH |
739 | if (p->section == sreloc) |
740 | break; | |
741 | ||
742 | if (p == NULL) | |
743 | { | |
744 | p = ((struct elf_m68k_pcrel_relocs_copied *) | |
dc810e39 | 745 | bfd_alloc (dynobj, (bfd_size_type) sizeof *p)); |
252b5132 | 746 | if (p == NULL) |
b34976b6 | 747 | return FALSE; |
b6152c34 AS |
748 | p->next = *head; |
749 | *head = p; | |
252b5132 RH |
750 | p->section = sreloc; |
751 | p->count = 0; | |
752 | } | |
753 | ||
754 | ++p->count; | |
755 | } | |
756 | } | |
757 | ||
758 | break; | |
759 | ||
760 | /* This relocation describes the C++ object vtable hierarchy. | |
761 | Reconstruct it for later use during GC. */ | |
762 | case R_68K_GNU_VTINHERIT: | |
763 | if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) | |
b34976b6 | 764 | return FALSE; |
252b5132 RH |
765 | break; |
766 | ||
767 | /* This relocation describes which C++ vtable entries are actually | |
768 | used. Record for later use during GC. */ | |
769 | case R_68K_GNU_VTENTRY: | |
770 | if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_addend)) | |
b34976b6 | 771 | return FALSE; |
252b5132 RH |
772 | break; |
773 | ||
774 | default: | |
775 | break; | |
776 | } | |
777 | } | |
778 | ||
b34976b6 | 779 | return TRUE; |
252b5132 RH |
780 | } |
781 | ||
782 | /* Return the section that should be marked against GC for a given | |
783 | relocation. */ | |
784 | ||
785 | static asection * | |
1e2f5b6e AM |
786 | elf_m68k_gc_mark_hook (sec, info, rel, h, sym) |
787 | asection *sec; | |
121089cb | 788 | struct bfd_link_info *info ATTRIBUTE_UNUSED; |
252b5132 RH |
789 | Elf_Internal_Rela *rel; |
790 | struct elf_link_hash_entry *h; | |
791 | Elf_Internal_Sym *sym; | |
792 | { | |
793 | if (h != NULL) | |
794 | { | |
795 | switch (ELF32_R_TYPE (rel->r_info)) | |
796 | { | |
797 | case R_68K_GNU_VTINHERIT: | |
798 | case R_68K_GNU_VTENTRY: | |
799 | break; | |
800 | ||
801 | default: | |
802 | switch (h->root.type) | |
803 | { | |
804 | default: | |
805 | break; | |
806 | ||
807 | case bfd_link_hash_defined: | |
808 | case bfd_link_hash_defweak: | |
809 | return h->root.u.def.section; | |
810 | ||
811 | case bfd_link_hash_common: | |
812 | return h->root.u.c.p->section; | |
813 | } | |
814 | } | |
815 | } | |
816 | else | |
1e2f5b6e | 817 | return bfd_section_from_elf_index (sec->owner, sym->st_shndx); |
252b5132 RH |
818 | |
819 | return NULL; | |
820 | } | |
821 | ||
822 | /* Update the got entry reference counts for the section being removed. */ | |
823 | ||
b34976b6 | 824 | static bfd_boolean |
252b5132 RH |
825 | elf_m68k_gc_sweep_hook (abfd, info, sec, relocs) |
826 | bfd *abfd; | |
827 | struct bfd_link_info *info; | |
828 | asection *sec; | |
829 | const Elf_Internal_Rela *relocs; | |
830 | { | |
831 | Elf_Internal_Shdr *symtab_hdr; | |
832 | struct elf_link_hash_entry **sym_hashes; | |
833 | bfd_signed_vma *local_got_refcounts; | |
834 | const Elf_Internal_Rela *rel, *relend; | |
835 | unsigned long r_symndx; | |
836 | struct elf_link_hash_entry *h; | |
837 | bfd *dynobj; | |
dd5724d5 AM |
838 | asection *sgot; |
839 | asection *srelgot; | |
252b5132 RH |
840 | |
841 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
842 | sym_hashes = elf_sym_hashes (abfd); | |
843 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
844 | ||
845 | dynobj = elf_hash_table (info)->dynobj; | |
dd5724d5 | 846 | if (dynobj == NULL) |
b34976b6 | 847 | return TRUE; |
dd5724d5 AM |
848 | |
849 | sgot = bfd_get_section_by_name (dynobj, ".got"); | |
850 | srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); | |
252b5132 RH |
851 | |
852 | relend = relocs + sec->reloc_count; | |
853 | for (rel = relocs; rel < relend; rel++) | |
854 | { | |
855 | switch (ELF32_R_TYPE (rel->r_info)) | |
856 | { | |
857 | case R_68K_GOT8: | |
858 | case R_68K_GOT16: | |
859 | case R_68K_GOT32: | |
860 | case R_68K_GOT8O: | |
861 | case R_68K_GOT16O: | |
862 | case R_68K_GOT32O: | |
863 | r_symndx = ELF32_R_SYM (rel->r_info); | |
864 | if (r_symndx >= symtab_hdr->sh_info) | |
865 | { | |
866 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
867 | if (h->got.refcount > 0) | |
868 | { | |
869 | --h->got.refcount; | |
870 | if (h->got.refcount == 0) | |
871 | { | |
872 | /* We don't need the .got entry any more. */ | |
873 | sgot->_raw_size -= 4; | |
874 | srelgot->_raw_size -= sizeof (Elf32_External_Rela); | |
875 | } | |
876 | } | |
877 | } | |
dd5724d5 | 878 | else if (local_got_refcounts != NULL) |
252b5132 RH |
879 | { |
880 | if (local_got_refcounts[r_symndx] > 0) | |
881 | { | |
882 | --local_got_refcounts[r_symndx]; | |
883 | if (local_got_refcounts[r_symndx] == 0) | |
884 | { | |
885 | /* We don't need the .got entry any more. */ | |
886 | sgot->_raw_size -= 4; | |
887 | if (info->shared) | |
888 | srelgot->_raw_size -= sizeof (Elf32_External_Rela); | |
889 | } | |
890 | } | |
891 | } | |
892 | break; | |
893 | ||
894 | case R_68K_PLT8: | |
895 | case R_68K_PLT16: | |
896 | case R_68K_PLT32: | |
897 | case R_68K_PLT8O: | |
898 | case R_68K_PLT16O: | |
899 | case R_68K_PLT32O: | |
900 | case R_68K_PC8: | |
901 | case R_68K_PC16: | |
902 | case R_68K_PC32: | |
903 | case R_68K_8: | |
904 | case R_68K_16: | |
905 | case R_68K_32: | |
906 | r_symndx = ELF32_R_SYM (rel->r_info); | |
907 | if (r_symndx >= symtab_hdr->sh_info) | |
908 | { | |
909 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
910 | if (h->plt.refcount > 0) | |
911 | --h->plt.refcount; | |
912 | } | |
913 | break; | |
914 | ||
915 | default: | |
916 | break; | |
917 | } | |
918 | } | |
919 | ||
b34976b6 | 920 | return TRUE; |
252b5132 RH |
921 | } |
922 | ||
252b5132 RH |
923 | /* Adjust a symbol defined by a dynamic object and referenced by a |
924 | regular object. The current definition is in some section of the | |
925 | dynamic object, but we're not including those sections. We have to | |
926 | change the definition to something the rest of the link can | |
927 | understand. */ | |
928 | ||
b34976b6 | 929 | static bfd_boolean |
252b5132 RH |
930 | elf_m68k_adjust_dynamic_symbol (info, h) |
931 | struct bfd_link_info *info; | |
932 | struct elf_link_hash_entry *h; | |
933 | { | |
934 | bfd *dynobj; | |
935 | asection *s; | |
936 | unsigned int power_of_two; | |
937 | ||
938 | dynobj = elf_hash_table (info)->dynobj; | |
939 | ||
940 | /* Make sure we know what is going on here. */ | |
941 | BFD_ASSERT (dynobj != NULL | |
942 | && ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) | |
943 | || h->weakdef != NULL | |
944 | || ((h->elf_link_hash_flags | |
945 | & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
946 | && (h->elf_link_hash_flags | |
947 | & ELF_LINK_HASH_REF_REGULAR) != 0 | |
948 | && (h->elf_link_hash_flags | |
949 | & ELF_LINK_HASH_DEF_REGULAR) == 0))); | |
950 | ||
951 | /* If this is a function, put it in the procedure linkage table. We | |
952 | will fill in the contents of the procedure linkage table later, | |
953 | when we know the address of the .got section. */ | |
954 | if (h->type == STT_FUNC | |
955 | || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0) | |
956 | { | |
957 | if (! info->shared | |
958 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0 | |
959 | && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) == 0 | |
960 | /* We must always create the plt entry if it was referenced | |
961 | by a PLTxxO relocation. In this case we already recorded | |
962 | it as a dynamic symbol. */ | |
963 | && h->dynindx == -1) | |
964 | { | |
965 | /* This case can occur if we saw a PLTxx reloc in an input | |
966 | file, but the symbol was never referred to by a dynamic | |
967 | object. In such a case, we don't actually need to build | |
968 | a procedure linkage table, and we can just do a PCxx | |
969 | reloc instead. */ | |
970 | BFD_ASSERT ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0); | |
971 | h->plt.offset = (bfd_vma) -1; | |
b34976b6 | 972 | return TRUE; |
252b5132 RH |
973 | } |
974 | ||
975 | /* GC may have rendered this entry unused. */ | |
976 | if (h->plt.refcount <= 0) | |
977 | { | |
978 | h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; | |
979 | h->plt.offset = (bfd_vma) -1; | |
b34976b6 | 980 | return TRUE; |
252b5132 RH |
981 | } |
982 | ||
983 | /* Make sure this symbol is output as a dynamic symbol. */ | |
b6152c34 AS |
984 | if (h->dynindx == -1 |
985 | && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) | |
252b5132 RH |
986 | { |
987 | if (! bfd_elf32_link_record_dynamic_symbol (info, h)) | |
b34976b6 | 988 | return FALSE; |
252b5132 RH |
989 | } |
990 | ||
991 | s = bfd_get_section_by_name (dynobj, ".plt"); | |
992 | BFD_ASSERT (s != NULL); | |
993 | ||
994 | /* If this is the first .plt entry, make room for the special | |
995 | first entry. */ | |
996 | if (s->_raw_size == 0) | |
70f06c4a AS |
997 | { |
998 | if (CPU32_FLAG (dynobj)) | |
999 | s->_raw_size += PLT_CPU32_ENTRY_SIZE; | |
1000 | else | |
1001 | s->_raw_size += PLT_ENTRY_SIZE; | |
1002 | } | |
252b5132 RH |
1003 | |
1004 | /* If this symbol is not defined in a regular file, and we are | |
1005 | not generating a shared library, then set the symbol to this | |
1006 | location in the .plt. This is required to make function | |
1007 | pointers compare as equal between the normal executable and | |
1008 | the shared library. */ | |
1009 | if (!info->shared | |
1010 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
1011 | { | |
1012 | h->root.u.def.section = s; | |
1013 | h->root.u.def.value = s->_raw_size; | |
1014 | } | |
1015 | ||
1016 | h->plt.offset = s->_raw_size; | |
1017 | ||
1018 | /* Make room for this entry. */ | |
9e1281c7 CM |
1019 | if (CPU32_FLAG (dynobj)) |
1020 | s->_raw_size += PLT_CPU32_ENTRY_SIZE; | |
1021 | else | |
1022 | s->_raw_size += PLT_ENTRY_SIZE; | |
252b5132 RH |
1023 | |
1024 | /* We also need to make an entry in the .got.plt section, which | |
1025 | will be placed in the .got section by the linker script. */ | |
1026 | ||
1027 | s = bfd_get_section_by_name (dynobj, ".got.plt"); | |
1028 | BFD_ASSERT (s != NULL); | |
1029 | s->_raw_size += 4; | |
1030 | ||
1031 | /* We also need to make an entry in the .rela.plt section. */ | |
1032 | ||
1033 | s = bfd_get_section_by_name (dynobj, ".rela.plt"); | |
1034 | BFD_ASSERT (s != NULL); | |
1035 | s->_raw_size += sizeof (Elf32_External_Rela); | |
1036 | ||
b34976b6 | 1037 | return TRUE; |
252b5132 RH |
1038 | } |
1039 | ||
1040 | /* Reinitialize the plt offset now that it is not used as a reference | |
1041 | count any more. */ | |
1042 | h->plt.offset = (bfd_vma) -1; | |
1043 | ||
1044 | /* If this is a weak symbol, and there is a real definition, the | |
1045 | processor independent code will have arranged for us to see the | |
1046 | real definition first, and we can just use the same value. */ | |
1047 | if (h->weakdef != NULL) | |
1048 | { | |
1049 | BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined | |
1050 | || h->weakdef->root.type == bfd_link_hash_defweak); | |
1051 | h->root.u.def.section = h->weakdef->root.u.def.section; | |
1052 | h->root.u.def.value = h->weakdef->root.u.def.value; | |
b34976b6 | 1053 | return TRUE; |
252b5132 RH |
1054 | } |
1055 | ||
1056 | /* This is a reference to a symbol defined by a dynamic object which | |
1057 | is not a function. */ | |
1058 | ||
1059 | /* If we are creating a shared library, we must presume that the | |
1060 | only references to the symbol are via the global offset table. | |
1061 | For such cases we need not do anything here; the relocations will | |
1062 | be handled correctly by relocate_section. */ | |
1063 | if (info->shared) | |
b34976b6 | 1064 | return TRUE; |
252b5132 RH |
1065 | |
1066 | /* We must allocate the symbol in our .dynbss section, which will | |
1067 | become part of the .bss section of the executable. There will be | |
1068 | an entry for this symbol in the .dynsym section. The dynamic | |
1069 | object will contain position independent code, so all references | |
1070 | from the dynamic object to this symbol will go through the global | |
1071 | offset table. The dynamic linker will use the .dynsym entry to | |
1072 | determine the address it must put in the global offset table, so | |
1073 | both the dynamic object and the regular object will refer to the | |
1074 | same memory location for the variable. */ | |
1075 | ||
1076 | s = bfd_get_section_by_name (dynobj, ".dynbss"); | |
1077 | BFD_ASSERT (s != NULL); | |
1078 | ||
1079 | /* We must generate a R_68K_COPY reloc to tell the dynamic linker to | |
1080 | copy the initial value out of the dynamic object and into the | |
1081 | runtime process image. We need to remember the offset into the | |
1082 | .rela.bss section we are going to use. */ | |
1083 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) | |
1084 | { | |
1085 | asection *srel; | |
1086 | ||
1087 | srel = bfd_get_section_by_name (dynobj, ".rela.bss"); | |
1088 | BFD_ASSERT (srel != NULL); | |
1089 | srel->_raw_size += sizeof (Elf32_External_Rela); | |
1090 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY; | |
1091 | } | |
1092 | ||
1093 | /* We need to figure out the alignment required for this symbol. I | |
1094 | have no idea how ELF linkers handle this. */ | |
1095 | power_of_two = bfd_log2 (h->size); | |
1096 | if (power_of_two > 3) | |
1097 | power_of_two = 3; | |
1098 | ||
1099 | /* Apply the required alignment. */ | |
1100 | s->_raw_size = BFD_ALIGN (s->_raw_size, | |
1101 | (bfd_size_type) (1 << power_of_two)); | |
1102 | if (power_of_two > bfd_get_section_alignment (dynobj, s)) | |
1103 | { | |
1104 | if (!bfd_set_section_alignment (dynobj, s, power_of_two)) | |
b34976b6 | 1105 | return FALSE; |
252b5132 RH |
1106 | } |
1107 | ||
1108 | /* Define the symbol as being at this point in the section. */ | |
1109 | h->root.u.def.section = s; | |
1110 | h->root.u.def.value = s->_raw_size; | |
1111 | ||
1112 | /* Increment the section size to make room for the symbol. */ | |
1113 | s->_raw_size += h->size; | |
1114 | ||
b34976b6 | 1115 | return TRUE; |
252b5132 RH |
1116 | } |
1117 | ||
1118 | /* Set the sizes of the dynamic sections. */ | |
1119 | ||
b34976b6 | 1120 | static bfd_boolean |
252b5132 | 1121 | elf_m68k_size_dynamic_sections (output_bfd, info) |
aa91b392 | 1122 | bfd *output_bfd ATTRIBUTE_UNUSED; |
252b5132 RH |
1123 | struct bfd_link_info *info; |
1124 | { | |
1125 | bfd *dynobj; | |
1126 | asection *s; | |
b34976b6 AM |
1127 | bfd_boolean plt; |
1128 | bfd_boolean relocs; | |
252b5132 RH |
1129 | |
1130 | dynobj = elf_hash_table (info)->dynobj; | |
1131 | BFD_ASSERT (dynobj != NULL); | |
1132 | ||
1133 | if (elf_hash_table (info)->dynamic_sections_created) | |
1134 | { | |
1135 | /* Set the contents of the .interp section to the interpreter. */ | |
1136 | if (!info->shared) | |
1137 | { | |
1138 | s = bfd_get_section_by_name (dynobj, ".interp"); | |
1139 | BFD_ASSERT (s != NULL); | |
1140 | s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER; | |
1141 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; | |
1142 | } | |
1143 | } | |
1144 | else | |
1145 | { | |
1146 | /* We may have created entries in the .rela.got section. | |
1147 | However, if we are not creating the dynamic sections, we will | |
1148 | not actually use these entries. Reset the size of .rela.got, | |
1149 | which will cause it to get stripped from the output file | |
1150 | below. */ | |
1151 | s = bfd_get_section_by_name (dynobj, ".rela.got"); | |
1152 | if (s != NULL) | |
1153 | s->_raw_size = 0; | |
1154 | } | |
1155 | ||
b6152c34 AS |
1156 | /* If this is a -Bsymbolic shared link, then we need to discard all |
1157 | PC relative relocs against symbols defined in a regular object. | |
1158 | For the normal shared case we discard the PC relative relocs | |
1159 | against symbols that have become local due to visibility changes. | |
1160 | We allocated space for them in the check_relocs routine, but we | |
1161 | will not fill them in in the relocate_section routine. */ | |
1162 | if (info->shared) | |
252b5132 RH |
1163 | elf_m68k_link_hash_traverse (elf_m68k_hash_table (info), |
1164 | elf_m68k_discard_copies, | |
b6152c34 | 1165 | (PTR) info); |
252b5132 RH |
1166 | |
1167 | /* The check_relocs and adjust_dynamic_symbol entry points have | |
1168 | determined the sizes of the various dynamic sections. Allocate | |
1169 | memory for them. */ | |
b34976b6 AM |
1170 | plt = FALSE; |
1171 | relocs = FALSE; | |
252b5132 RH |
1172 | for (s = dynobj->sections; s != NULL; s = s->next) |
1173 | { | |
1174 | const char *name; | |
b34976b6 | 1175 | bfd_boolean strip; |
252b5132 RH |
1176 | |
1177 | if ((s->flags & SEC_LINKER_CREATED) == 0) | |
1178 | continue; | |
1179 | ||
1180 | /* It's OK to base decisions on the section name, because none | |
1181 | of the dynobj section names depend upon the input files. */ | |
1182 | name = bfd_get_section_name (dynobj, s); | |
1183 | ||
b34976b6 | 1184 | strip = FALSE; |
252b5132 RH |
1185 | |
1186 | if (strcmp (name, ".plt") == 0) | |
1187 | { | |
1188 | if (s->_raw_size == 0) | |
1189 | { | |
1190 | /* Strip this section if we don't need it; see the | |
1191 | comment below. */ | |
b34976b6 | 1192 | strip = TRUE; |
252b5132 RH |
1193 | } |
1194 | else | |
1195 | { | |
1196 | /* Remember whether there is a PLT. */ | |
b34976b6 | 1197 | plt = TRUE; |
252b5132 RH |
1198 | } |
1199 | } | |
1200 | else if (strncmp (name, ".rela", 5) == 0) | |
1201 | { | |
1202 | if (s->_raw_size == 0) | |
1203 | { | |
1204 | /* If we don't need this section, strip it from the | |
1205 | output file. This is mostly to handle .rela.bss and | |
1206 | .rela.plt. We must create both sections in | |
1207 | create_dynamic_sections, because they must be created | |
1208 | before the linker maps input sections to output | |
1209 | sections. The linker does that before | |
1210 | adjust_dynamic_symbol is called, and it is that | |
1211 | function which decides whether anything needs to go | |
1212 | into these sections. */ | |
b34976b6 | 1213 | strip = TRUE; |
252b5132 RH |
1214 | } |
1215 | else | |
1216 | { | |
b34976b6 | 1217 | relocs = TRUE; |
252b5132 RH |
1218 | |
1219 | /* We use the reloc_count field as a counter if we need | |
1220 | to copy relocs into the output file. */ | |
1221 | s->reloc_count = 0; | |
1222 | } | |
1223 | } | |
1224 | else if (strncmp (name, ".got", 4) != 0) | |
1225 | { | |
1226 | /* It's not one of our sections, so don't allocate space. */ | |
1227 | continue; | |
1228 | } | |
1229 | ||
1230 | if (strip) | |
1231 | { | |
7f8d5fc9 | 1232 | _bfd_strip_section_from_output (info, s); |
252b5132 RH |
1233 | continue; |
1234 | } | |
1235 | ||
1236 | /* Allocate memory for the section contents. */ | |
7a9af8c4 NC |
1237 | /* FIXME: This should be a call to bfd_alloc not bfd_zalloc. |
1238 | Unused entries should be reclaimed before the section's contents | |
1239 | are written out, but at the moment this does not happen. Thus in | |
1240 | order to prevent writing out garbage, we initialise the section's | |
1241 | contents to zero. */ | |
1242 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size); | |
252b5132 | 1243 | if (s->contents == NULL && s->_raw_size != 0) |
b34976b6 | 1244 | return FALSE; |
252b5132 RH |
1245 | } |
1246 | ||
1247 | if (elf_hash_table (info)->dynamic_sections_created) | |
1248 | { | |
1249 | /* Add some entries to the .dynamic section. We fill in the | |
1250 | values later, in elf_m68k_finish_dynamic_sections, but we | |
1251 | must add the entries now so that we get the correct size for | |
1252 | the .dynamic section. The DT_DEBUG entry is filled in by the | |
1253 | dynamic linker and used by the debugger. */ | |
dc810e39 AM |
1254 | #define add_dynamic_entry(TAG, VAL) \ |
1255 | bfd_elf32_add_dynamic_entry (info, (bfd_vma) (TAG), (bfd_vma) (VAL)) | |
1256 | ||
252b5132 RH |
1257 | if (!info->shared) |
1258 | { | |
dc810e39 | 1259 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
b34976b6 | 1260 | return FALSE; |
252b5132 RH |
1261 | } |
1262 | ||
1263 | if (plt) | |
1264 | { | |
dc810e39 AM |
1265 | if (!add_dynamic_entry (DT_PLTGOT, 0) |
1266 | || !add_dynamic_entry (DT_PLTRELSZ, 0) | |
1267 | || !add_dynamic_entry (DT_PLTREL, DT_RELA) | |
1268 | || !add_dynamic_entry (DT_JMPREL, 0)) | |
b34976b6 | 1269 | return FALSE; |
252b5132 RH |
1270 | } |
1271 | ||
1272 | if (relocs) | |
1273 | { | |
dc810e39 AM |
1274 | if (!add_dynamic_entry (DT_RELA, 0) |
1275 | || !add_dynamic_entry (DT_RELASZ, 0) | |
1276 | || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela))) | |
b34976b6 | 1277 | return FALSE; |
252b5132 RH |
1278 | } |
1279 | ||
aa91b392 | 1280 | if ((info->flags & DF_TEXTREL) != 0) |
252b5132 | 1281 | { |
dc810e39 | 1282 | if (!add_dynamic_entry (DT_TEXTREL, 0)) |
b34976b6 | 1283 | return FALSE; |
252b5132 RH |
1284 | } |
1285 | } | |
dc810e39 | 1286 | #undef add_dynamic_entry |
252b5132 | 1287 | |
b34976b6 | 1288 | return TRUE; |
252b5132 RH |
1289 | } |
1290 | ||
1291 | /* This function is called via elf_m68k_link_hash_traverse if we are | |
b6152c34 AS |
1292 | creating a shared object. In the -Bsymbolic case it discards the |
1293 | space allocated to copy PC relative relocs against symbols which | |
3e829b4a | 1294 | are defined in regular objects. For the normal shared case, it |
b6152c34 AS |
1295 | discards space for pc-relative relocs that have become local due to |
1296 | symbol visibility changes. We allocated space for them in the | |
1297 | check_relocs routine, but we won't fill them in in the | |
3e829b4a AS |
1298 | relocate_section routine. |
1299 | ||
1300 | We also check whether any of the remaining relocations apply | |
1301 | against a readonly section, and set the DF_TEXTREL flag in this | |
1302 | case. */ | |
252b5132 | 1303 | |
b34976b6 | 1304 | static bfd_boolean |
b6152c34 | 1305 | elf_m68k_discard_copies (h, inf) |
252b5132 | 1306 | struct elf_m68k_link_hash_entry *h; |
b6152c34 | 1307 | PTR inf; |
252b5132 | 1308 | { |
b6152c34 | 1309 | struct bfd_link_info *info = (struct bfd_link_info *) inf; |
252b5132 RH |
1310 | struct elf_m68k_pcrel_relocs_copied *s; |
1311 | ||
e92d460e AM |
1312 | if (h->root.root.type == bfd_link_hash_warning) |
1313 | h = (struct elf_m68k_link_hash_entry *) h->root.root.u.i.link; | |
1314 | ||
b6152c34 AS |
1315 | if ((h->root.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0 |
1316 | || (!info->symbolic | |
1317 | && (h->root.elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)) | |
3e829b4a AS |
1318 | { |
1319 | if ((info->flags & DF_TEXTREL) == 0) | |
1320 | { | |
1321 | /* Look for relocations against read-only sections. */ | |
1322 | for (s = h->pcrel_relocs_copied; s != NULL; s = s->next) | |
1323 | if ((s->section->flags & SEC_READONLY) != 0) | |
1324 | { | |
1325 | info->flags |= DF_TEXTREL; | |
1326 | break; | |
1327 | } | |
1328 | } | |
1329 | return TRUE; | |
1330 | } | |
252b5132 RH |
1331 | |
1332 | for (s = h->pcrel_relocs_copied; s != NULL; s = s->next) | |
1333 | s->section->_raw_size -= s->count * sizeof (Elf32_External_Rela); | |
1334 | ||
b34976b6 | 1335 | return TRUE; |
252b5132 RH |
1336 | } |
1337 | ||
1338 | /* Relocate an M68K ELF section. */ | |
1339 | ||
b34976b6 | 1340 | static bfd_boolean |
252b5132 RH |
1341 | elf_m68k_relocate_section (output_bfd, info, input_bfd, input_section, |
1342 | contents, relocs, local_syms, local_sections) | |
1343 | bfd *output_bfd; | |
1344 | struct bfd_link_info *info; | |
1345 | bfd *input_bfd; | |
1346 | asection *input_section; | |
1347 | bfd_byte *contents; | |
1348 | Elf_Internal_Rela *relocs; | |
1349 | Elf_Internal_Sym *local_syms; | |
1350 | asection **local_sections; | |
1351 | { | |
1352 | bfd *dynobj; | |
1353 | Elf_Internal_Shdr *symtab_hdr; | |
1354 | struct elf_link_hash_entry **sym_hashes; | |
1355 | bfd_vma *local_got_offsets; | |
1356 | asection *sgot; | |
1357 | asection *splt; | |
1358 | asection *sreloc; | |
1359 | Elf_Internal_Rela *rel; | |
1360 | Elf_Internal_Rela *relend; | |
1361 | ||
b491616a | 1362 | if (info->relocateable) |
b34976b6 | 1363 | return TRUE; |
b491616a | 1364 | |
252b5132 RH |
1365 | dynobj = elf_hash_table (info)->dynobj; |
1366 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
1367 | sym_hashes = elf_sym_hashes (input_bfd); | |
1368 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
1369 | ||
1370 | sgot = NULL; | |
1371 | splt = NULL; | |
1372 | sreloc = NULL; | |
1373 | ||
1374 | rel = relocs; | |
1375 | relend = relocs + input_section->reloc_count; | |
1376 | for (; rel < relend; rel++) | |
1377 | { | |
1378 | int r_type; | |
1379 | reloc_howto_type *howto; | |
1380 | unsigned long r_symndx; | |
1381 | struct elf_link_hash_entry *h; | |
1382 | Elf_Internal_Sym *sym; | |
1383 | asection *sec; | |
1384 | bfd_vma relocation; | |
1385 | bfd_reloc_status_type r; | |
1386 | ||
1387 | r_type = ELF32_R_TYPE (rel->r_info); | |
1388 | if (r_type < 0 || r_type >= (int) R_68K_max) | |
1389 | { | |
1390 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 1391 | return FALSE; |
252b5132 RH |
1392 | } |
1393 | howto = howto_table + r_type; | |
1394 | ||
1395 | r_symndx = ELF32_R_SYM (rel->r_info); | |
1396 | ||
252b5132 RH |
1397 | h = NULL; |
1398 | sym = NULL; | |
1399 | sec = NULL; | |
1400 | if (r_symndx < symtab_hdr->sh_info) | |
1401 | { | |
1402 | sym = local_syms + r_symndx; | |
1403 | sec = local_sections[r_symndx]; | |
f8df10f4 | 1404 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, sec, rel); |
252b5132 RH |
1405 | } |
1406 | else | |
1407 | { | |
1408 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
1409 | while (h->root.type == bfd_link_hash_indirect | |
1410 | || h->root.type == bfd_link_hash_warning) | |
1411 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1412 | if (h->root.type == bfd_link_hash_defined | |
1413 | || h->root.type == bfd_link_hash_defweak) | |
1414 | { | |
1415 | sec = h->root.u.def.section; | |
1416 | if (((r_type == R_68K_PLT8 | |
1417 | || r_type == R_68K_PLT16 | |
1418 | || r_type == R_68K_PLT32 | |
1419 | || r_type == R_68K_PLT8O | |
1420 | || r_type == R_68K_PLT16O | |
1421 | || r_type == R_68K_PLT32O) | |
1422 | && h->plt.offset != (bfd_vma) -1 | |
1423 | && elf_hash_table (info)->dynamic_sections_created) | |
1424 | || ((r_type == R_68K_GOT8O | |
1425 | || r_type == R_68K_GOT16O | |
1426 | || r_type == R_68K_GOT32O | |
1427 | || ((r_type == R_68K_GOT8 | |
1428 | || r_type == R_68K_GOT16 | |
1429 | || r_type == R_68K_GOT32) | |
1430 | && strcmp (h->root.root.string, | |
1431 | "_GLOBAL_OFFSET_TABLE_") != 0)) | |
1432 | && elf_hash_table (info)->dynamic_sections_created | |
1433 | && (! info->shared | |
1434 | || (! info->symbolic && h->dynindx != -1) | |
1435 | || (h->elf_link_hash_flags | |
1436 | & ELF_LINK_HASH_DEF_REGULAR) == 0)) | |
1437 | || (info->shared | |
1438 | && ((! info->symbolic && h->dynindx != -1) | |
1439 | || (h->elf_link_hash_flags | |
1440 | & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
95fc45e6 AS |
1441 | && ((input_section->flags & SEC_ALLOC) != 0 |
1442 | /* DWARF will emit R_68K_32 relocations in its | |
1443 | sections against symbols defined externally | |
1444 | in shared libraries. We can't do anything | |
1445 | with them here. */ | |
1446 | || ((input_section->flags & SEC_DEBUGGING) != 0 | |
1447 | && (h->elf_link_hash_flags | |
1448 | & ELF_LINK_HASH_DEF_DYNAMIC) != 0)) | |
252b5132 RH |
1449 | && (r_type == R_68K_8 |
1450 | || r_type == R_68K_16 | |
1451 | || r_type == R_68K_32 | |
1452 | || r_type == R_68K_PC8 | |
1453 | || r_type == R_68K_PC16 | |
1454 | || r_type == R_68K_PC32))) | |
1455 | { | |
1456 | /* In these cases, we don't need the relocation | |
1457 | value. We check specially because in some | |
1458 | obscure cases sec->output_section will be NULL. */ | |
1459 | relocation = 0; | |
1460 | } | |
1461 | else | |
1462 | relocation = (h->root.u.def.value | |
1463 | + sec->output_section->vma | |
1464 | + sec->output_offset); | |
1465 | } | |
1466 | else if (h->root.type == bfd_link_hash_undefweak) | |
1467 | relocation = 0; | |
671bae9c NC |
1468 | else if (info->shared |
1469 | && (!info->symbolic || info->allow_shlib_undefined) | |
3a27a730 L |
1470 | && !info->no_undefined |
1471 | && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) | |
252b5132 RH |
1472 | relocation = 0; |
1473 | else | |
1474 | { | |
1475 | if (!(info->callbacks->undefined_symbol | |
1476 | (info, h->root.root.string, input_bfd, | |
5cc7c785 | 1477 | input_section, rel->r_offset, |
3a27a730 L |
1478 | (!info->shared || info->no_undefined |
1479 | || ELF_ST_VISIBILITY (h->other))))) | |
b34976b6 | 1480 | return FALSE; |
252b5132 RH |
1481 | relocation = 0; |
1482 | } | |
1483 | } | |
1484 | ||
1485 | switch (r_type) | |
1486 | { | |
1487 | case R_68K_GOT8: | |
1488 | case R_68K_GOT16: | |
1489 | case R_68K_GOT32: | |
1490 | /* Relocation is to the address of the entry for this symbol | |
1491 | in the global offset table. */ | |
1492 | if (h != NULL | |
1493 | && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) | |
1494 | break; | |
1495 | /* Fall through. */ | |
1496 | case R_68K_GOT8O: | |
1497 | case R_68K_GOT16O: | |
1498 | case R_68K_GOT32O: | |
1499 | /* Relocation is the offset of the entry for this symbol in | |
1500 | the global offset table. */ | |
1501 | ||
1502 | { | |
1503 | bfd_vma off; | |
1504 | ||
1505 | if (sgot == NULL) | |
1506 | { | |
1507 | sgot = bfd_get_section_by_name (dynobj, ".got"); | |
1508 | BFD_ASSERT (sgot != NULL); | |
1509 | } | |
1510 | ||
1511 | if (h != NULL) | |
1512 | { | |
1513 | off = h->got.offset; | |
1514 | BFD_ASSERT (off != (bfd_vma) -1); | |
1515 | ||
1516 | if (!elf_hash_table (info)->dynamic_sections_created | |
1517 | || (info->shared | |
1518 | && (info->symbolic || h->dynindx == -1) | |
1519 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))) | |
1520 | { | |
1521 | /* This is actually a static link, or it is a | |
1522 | -Bsymbolic link and the symbol is defined | |
1523 | locally, or the symbol was forced to be local | |
1524 | because of a version file.. We must initialize | |
1525 | this entry in the global offset table. Since | |
1526 | the offset must always be a multiple of 4, we | |
1527 | use the least significant bit to record whether | |
1528 | we have initialized it already. | |
1529 | ||
1530 | When doing a dynamic link, we create a .rela.got | |
1531 | relocation entry to initialize the value. This | |
1532 | is done in the finish_dynamic_symbol routine. */ | |
1533 | if ((off & 1) != 0) | |
1534 | off &= ~1; | |
1535 | else | |
1536 | { | |
1537 | bfd_put_32 (output_bfd, relocation, | |
1538 | sgot->contents + off); | |
1539 | h->got.offset |= 1; | |
1540 | } | |
1541 | } | |
1542 | } | |
1543 | else | |
1544 | { | |
1545 | BFD_ASSERT (local_got_offsets != NULL | |
1546 | && local_got_offsets[r_symndx] != (bfd_vma) -1); | |
1547 | ||
1548 | off = local_got_offsets[r_symndx]; | |
1549 | ||
1550 | /* The offset must always be a multiple of 4. We use | |
1551 | the least significant bit to record whether we have | |
1552 | already generated the necessary reloc. */ | |
1553 | if ((off & 1) != 0) | |
1554 | off &= ~1; | |
1555 | else | |
1556 | { | |
1557 | bfd_put_32 (output_bfd, relocation, sgot->contents + off); | |
1558 | ||
1559 | if (info->shared) | |
1560 | { | |
947216bf | 1561 | asection *s; |
252b5132 | 1562 | Elf_Internal_Rela outrel; |
947216bf | 1563 | bfd_byte *loc; |
252b5132 | 1564 | |
947216bf AM |
1565 | s = bfd_get_section_by_name (dynobj, ".rela.got"); |
1566 | BFD_ASSERT (s != NULL); | |
252b5132 RH |
1567 | |
1568 | outrel.r_offset = (sgot->output_section->vma | |
1569 | + sgot->output_offset | |
1570 | + off); | |
1571 | outrel.r_info = ELF32_R_INFO (0, R_68K_RELATIVE); | |
1572 | outrel.r_addend = relocation; | |
947216bf AM |
1573 | loc = s->contents; |
1574 | loc += s->reloc_count++ * sizeof (Elf32_External_Rela); | |
1575 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); | |
252b5132 RH |
1576 | } |
1577 | ||
1578 | local_got_offsets[r_symndx] |= 1; | |
1579 | } | |
1580 | } | |
1581 | ||
1582 | relocation = sgot->output_offset + off; | |
1583 | if (r_type == R_68K_GOT8O | |
1584 | || r_type == R_68K_GOT16O | |
1585 | || r_type == R_68K_GOT32O) | |
1586 | { | |
1587 | /* This relocation does not use the addend. */ | |
1588 | rel->r_addend = 0; | |
1589 | } | |
1590 | else | |
1591 | relocation += sgot->output_section->vma; | |
1592 | } | |
1593 | break; | |
1594 | ||
1595 | case R_68K_PLT8: | |
1596 | case R_68K_PLT16: | |
1597 | case R_68K_PLT32: | |
1598 | /* Relocation is to the entry for this symbol in the | |
1599 | procedure linkage table. */ | |
1600 | ||
1601 | /* Resolve a PLTxx reloc against a local symbol directly, | |
1602 | without using the procedure linkage table. */ | |
1603 | if (h == NULL) | |
1604 | break; | |
1605 | ||
1606 | if (h->plt.offset == (bfd_vma) -1 | |
1607 | || !elf_hash_table (info)->dynamic_sections_created) | |
1608 | { | |
1609 | /* We didn't make a PLT entry for this symbol. This | |
1610 | happens when statically linking PIC code, or when | |
1611 | using -Bsymbolic. */ | |
1612 | break; | |
1613 | } | |
1614 | ||
1615 | if (splt == NULL) | |
1616 | { | |
1617 | splt = bfd_get_section_by_name (dynobj, ".plt"); | |
1618 | BFD_ASSERT (splt != NULL); | |
1619 | } | |
1620 | ||
1621 | relocation = (splt->output_section->vma | |
1622 | + splt->output_offset | |
1623 | + h->plt.offset); | |
1624 | break; | |
1625 | ||
1626 | case R_68K_PLT8O: | |
1627 | case R_68K_PLT16O: | |
1628 | case R_68K_PLT32O: | |
1629 | /* Relocation is the offset of the entry for this symbol in | |
1630 | the procedure linkage table. */ | |
1631 | BFD_ASSERT (h != NULL && h->plt.offset != (bfd_vma) -1); | |
1632 | ||
1633 | if (splt == NULL) | |
1634 | { | |
1635 | splt = bfd_get_section_by_name (dynobj, ".plt"); | |
1636 | BFD_ASSERT (splt != NULL); | |
1637 | } | |
1638 | ||
1639 | relocation = h->plt.offset; | |
1640 | ||
1641 | /* This relocation does not use the addend. */ | |
1642 | rel->r_addend = 0; | |
1643 | ||
1644 | break; | |
1645 | ||
1646 | case R_68K_PC8: | |
1647 | case R_68K_PC16: | |
1648 | case R_68K_PC32: | |
b6152c34 AS |
1649 | if (h == NULL |
1650 | || (info->shared | |
1651 | && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0)) | |
252b5132 RH |
1652 | break; |
1653 | /* Fall through. */ | |
1654 | case R_68K_8: | |
1655 | case R_68K_16: | |
1656 | case R_68K_32: | |
1657 | if (info->shared | |
ec338859 | 1658 | && r_symndx != 0 |
252b5132 RH |
1659 | && (input_section->flags & SEC_ALLOC) != 0 |
1660 | && ((r_type != R_68K_PC8 | |
1661 | && r_type != R_68K_PC16 | |
1662 | && r_type != R_68K_PC32) | |
1663 | || (!info->symbolic | |
1664 | || (h->elf_link_hash_flags | |
1665 | & ELF_LINK_HASH_DEF_REGULAR) == 0))) | |
1666 | { | |
1667 | Elf_Internal_Rela outrel; | |
947216bf | 1668 | bfd_byte *loc; |
b34976b6 | 1669 | bfd_boolean skip, relocate; |
252b5132 RH |
1670 | |
1671 | /* When generating a shared object, these relocations | |
1672 | are copied into the output file to be resolved at run | |
1673 | time. */ | |
1674 | ||
1675 | if (sreloc == NULL) | |
1676 | { | |
1677 | const char *name; | |
1678 | ||
1679 | name = (bfd_elf_string_from_elf_section | |
1680 | (input_bfd, | |
1681 | elf_elfheader (input_bfd)->e_shstrndx, | |
1682 | elf_section_data (input_section)->rel_hdr.sh_name)); | |
1683 | if (name == NULL) | |
b34976b6 | 1684 | return FALSE; |
252b5132 RH |
1685 | |
1686 | BFD_ASSERT (strncmp (name, ".rela", 5) == 0 | |
1687 | && strcmp (bfd_get_section_name (input_bfd, | |
1688 | input_section), | |
1689 | name + 5) == 0); | |
1690 | ||
1691 | sreloc = bfd_get_section_by_name (dynobj, name); | |
1692 | BFD_ASSERT (sreloc != NULL); | |
1693 | } | |
1694 | ||
b34976b6 AM |
1695 | skip = FALSE; |
1696 | relocate = FALSE; | |
252b5132 | 1697 | |
c629eae0 JJ |
1698 | outrel.r_offset = |
1699 | _bfd_elf_section_offset (output_bfd, info, input_section, | |
1700 | rel->r_offset); | |
1701 | if (outrel.r_offset == (bfd_vma) -1) | |
b34976b6 | 1702 | skip = TRUE; |
0bb2d96a | 1703 | else if (outrel.r_offset == (bfd_vma) -2) |
b34976b6 | 1704 | skip = TRUE, relocate = TRUE; |
252b5132 RH |
1705 | outrel.r_offset += (input_section->output_section->vma |
1706 | + input_section->output_offset); | |
1707 | ||
1708 | if (skip) | |
0bb2d96a | 1709 | memset (&outrel, 0, sizeof outrel); |
252b5132 RH |
1710 | /* h->dynindx may be -1 if the symbol was marked to |
1711 | become local. */ | |
1712 | else if (h != NULL | |
1713 | && ((! info->symbolic && h->dynindx != -1) | |
1714 | || (h->elf_link_hash_flags | |
1715 | & ELF_LINK_HASH_DEF_REGULAR) == 0)) | |
1716 | { | |
1717 | BFD_ASSERT (h->dynindx != -1); | |
252b5132 RH |
1718 | outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); |
1719 | outrel.r_addend = relocation + rel->r_addend; | |
1720 | } | |
1721 | else | |
1722 | { | |
1723 | if (r_type == R_68K_32) | |
1724 | { | |
b34976b6 | 1725 | relocate = TRUE; |
252b5132 RH |
1726 | outrel.r_info = ELF32_R_INFO (0, R_68K_RELATIVE); |
1727 | outrel.r_addend = relocation + rel->r_addend; | |
1728 | } | |
1729 | else | |
1730 | { | |
1731 | long indx; | |
1732 | ||
1733 | if (h == NULL) | |
1734 | sec = local_sections[r_symndx]; | |
1735 | else | |
1736 | { | |
1737 | BFD_ASSERT (h->root.type == bfd_link_hash_defined | |
1738 | || (h->root.type | |
1739 | == bfd_link_hash_defweak)); | |
1740 | sec = h->root.u.def.section; | |
1741 | } | |
1742 | if (sec != NULL && bfd_is_abs_section (sec)) | |
1743 | indx = 0; | |
1744 | else if (sec == NULL || sec->owner == NULL) | |
1745 | { | |
1746 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 1747 | return FALSE; |
252b5132 RH |
1748 | } |
1749 | else | |
1750 | { | |
1751 | asection *osec; | |
1752 | ||
1753 | osec = sec->output_section; | |
1754 | indx = elf_section_data (osec)->dynindx; | |
1755 | BFD_ASSERT (indx > 0); | |
1756 | } | |
1757 | ||
252b5132 RH |
1758 | outrel.r_info = ELF32_R_INFO (indx, r_type); |
1759 | outrel.r_addend = relocation + rel->r_addend; | |
1760 | } | |
1761 | } | |
1762 | ||
947216bf AM |
1763 | loc = sreloc->contents; |
1764 | loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela); | |
1765 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); | |
252b5132 RH |
1766 | |
1767 | /* This reloc will be computed at runtime, so there's no | |
1768 | need to do anything now, except for R_68K_32 | |
1769 | relocations that have been turned into | |
1770 | R_68K_RELATIVE. */ | |
1771 | if (!relocate) | |
1772 | continue; | |
1773 | } | |
1774 | ||
1775 | break; | |
1776 | ||
1777 | case R_68K_GNU_VTINHERIT: | |
1778 | case R_68K_GNU_VTENTRY: | |
1779 | /* These are no-ops in the end. */ | |
1780 | continue; | |
1781 | ||
1782 | default: | |
1783 | break; | |
1784 | } | |
1785 | ||
1786 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, | |
1787 | contents, rel->r_offset, | |
1788 | relocation, rel->r_addend); | |
1789 | ||
1790 | if (r != bfd_reloc_ok) | |
1791 | { | |
1792 | switch (r) | |
1793 | { | |
1794 | default: | |
1795 | case bfd_reloc_outofrange: | |
1796 | abort (); | |
1797 | case bfd_reloc_overflow: | |
1798 | { | |
1799 | const char *name; | |
1800 | ||
1801 | if (h != NULL) | |
1802 | name = h->root.root.string; | |
1803 | else | |
1804 | { | |
1805 | name = bfd_elf_string_from_elf_section (input_bfd, | |
1806 | symtab_hdr->sh_link, | |
1807 | sym->st_name); | |
1808 | if (name == NULL) | |
b34976b6 | 1809 | return FALSE; |
252b5132 RH |
1810 | if (*name == '\0') |
1811 | name = bfd_section_name (input_bfd, sec); | |
1812 | } | |
1813 | if (!(info->callbacks->reloc_overflow | |
1814 | (info, name, howto->name, (bfd_vma) 0, | |
1815 | input_bfd, input_section, rel->r_offset))) | |
b34976b6 | 1816 | return FALSE; |
252b5132 RH |
1817 | } |
1818 | break; | |
1819 | } | |
1820 | } | |
1821 | } | |
1822 | ||
b34976b6 | 1823 | return TRUE; |
252b5132 RH |
1824 | } |
1825 | ||
1826 | /* Finish up dynamic symbol handling. We set the contents of various | |
1827 | dynamic sections here. */ | |
1828 | ||
b34976b6 | 1829 | static bfd_boolean |
252b5132 RH |
1830 | elf_m68k_finish_dynamic_symbol (output_bfd, info, h, sym) |
1831 | bfd *output_bfd; | |
1832 | struct bfd_link_info *info; | |
1833 | struct elf_link_hash_entry *h; | |
1834 | Elf_Internal_Sym *sym; | |
1835 | { | |
1836 | bfd *dynobj; | |
9e1281c7 | 1837 | int plt_off1, plt_off2, plt_off3; |
252b5132 RH |
1838 | |
1839 | dynobj = elf_hash_table (info)->dynobj; | |
1840 | ||
1841 | if (h->plt.offset != (bfd_vma) -1) | |
1842 | { | |
1843 | asection *splt; | |
1844 | asection *sgot; | |
1845 | asection *srela; | |
1846 | bfd_vma plt_index; | |
1847 | bfd_vma got_offset; | |
1848 | Elf_Internal_Rela rela; | |
947216bf | 1849 | bfd_byte *loc; |
252b5132 RH |
1850 | |
1851 | /* This symbol has an entry in the procedure linkage table. Set | |
1852 | it up. */ | |
1853 | ||
1854 | BFD_ASSERT (h->dynindx != -1); | |
1855 | ||
1856 | splt = bfd_get_section_by_name (dynobj, ".plt"); | |
1857 | sgot = bfd_get_section_by_name (dynobj, ".got.plt"); | |
1858 | srela = bfd_get_section_by_name (dynobj, ".rela.plt"); | |
1859 | BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL); | |
1860 | ||
1861 | /* Get the index in the procedure linkage table which | |
1862 | corresponds to this symbol. This is the index of this symbol | |
1863 | in all the symbols for which we are making plt entries. The | |
1864 | first entry in the procedure linkage table is reserved. */ | |
9e1281c7 CM |
1865 | if ( CPU32_FLAG (output_bfd)) |
1866 | plt_index = h->plt.offset / PLT_CPU32_ENTRY_SIZE - 1; | |
1867 | else | |
1868 | plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1; | |
252b5132 RH |
1869 | |
1870 | /* Get the offset into the .got table of the entry that | |
1871 | corresponds to this function. Each .got entry is 4 bytes. | |
1872 | The first three are reserved. */ | |
1873 | got_offset = (plt_index + 3) * 4; | |
1874 | ||
9e1281c7 CM |
1875 | if ( CPU32_FLAG (output_bfd)) |
1876 | { | |
1877 | /* Fill in the entry in the procedure linkage table. */ | |
1878 | memcpy (splt->contents + h->plt.offset, elf_cpu32_plt_entry, | |
1879 | PLT_CPU32_ENTRY_SIZE); | |
1880 | plt_off1 = 4; | |
1881 | plt_off2 = 12; | |
1882 | plt_off3 = 18; | |
1883 | } | |
1884 | else | |
1885 | { | |
1886 | /* Fill in the entry in the procedure linkage table. */ | |
1887 | memcpy (splt->contents + h->plt.offset, elf_m68k_plt_entry, | |
1888 | PLT_ENTRY_SIZE); | |
1889 | plt_off1 = 4; | |
1890 | plt_off2 = 10; | |
1891 | plt_off3 = 16; | |
1892 | } | |
1893 | ||
252b5132 RH |
1894 | /* The offset is relative to the first extension word. */ |
1895 | bfd_put_32 (output_bfd, | |
1896 | (sgot->output_section->vma | |
1897 | + sgot->output_offset | |
1898 | + got_offset | |
1899 | - (splt->output_section->vma | |
1900 | + h->plt.offset + 2)), | |
9e1281c7 | 1901 | splt->contents + h->plt.offset + plt_off1); |
252b5132 RH |
1902 | |
1903 | bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela), | |
9e1281c7 CM |
1904 | splt->contents + h->plt.offset + plt_off2); |
1905 | bfd_put_32 (output_bfd, - (h->plt.offset + plt_off3), | |
1906 | splt->contents + h->plt.offset + plt_off3); | |
252b5132 RH |
1907 | |
1908 | /* Fill in the entry in the global offset table. */ | |
1909 | bfd_put_32 (output_bfd, | |
1910 | (splt->output_section->vma | |
1911 | + splt->output_offset | |
1912 | + h->plt.offset | |
1913 | + 8), | |
1914 | sgot->contents + got_offset); | |
1915 | ||
1916 | /* Fill in the entry in the .rela.plt section. */ | |
1917 | rela.r_offset = (sgot->output_section->vma | |
1918 | + sgot->output_offset | |
1919 | + got_offset); | |
1920 | rela.r_info = ELF32_R_INFO (h->dynindx, R_68K_JMP_SLOT); | |
1921 | rela.r_addend = 0; | |
947216bf AM |
1922 | loc = srela->contents + plt_index * sizeof (Elf32_External_Rela); |
1923 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); | |
252b5132 RH |
1924 | |
1925 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
1926 | { | |
1927 | /* Mark the symbol as undefined, rather than as defined in | |
1928 | the .plt section. Leave the value alone. */ | |
1929 | sym->st_shndx = SHN_UNDEF; | |
1930 | } | |
1931 | } | |
1932 | ||
1933 | if (h->got.offset != (bfd_vma) -1) | |
1934 | { | |
1935 | asection *sgot; | |
1936 | asection *srela; | |
1937 | Elf_Internal_Rela rela; | |
947216bf | 1938 | bfd_byte *loc; |
252b5132 RH |
1939 | |
1940 | /* This symbol has an entry in the global offset table. Set it | |
1941 | up. */ | |
1942 | ||
1943 | sgot = bfd_get_section_by_name (dynobj, ".got"); | |
1944 | srela = bfd_get_section_by_name (dynobj, ".rela.got"); | |
1945 | BFD_ASSERT (sgot != NULL && srela != NULL); | |
1946 | ||
1947 | rela.r_offset = (sgot->output_section->vma | |
1948 | + sgot->output_offset | |
dc810e39 | 1949 | + (h->got.offset &~ (bfd_vma) 1)); |
252b5132 RH |
1950 | |
1951 | /* If this is a -Bsymbolic link, and the symbol is defined | |
1952 | locally, we just want to emit a RELATIVE reloc. Likewise if | |
1953 | the symbol was forced to be local because of a version file. | |
1954 | The entry in the global offset table will already have been | |
1955 | initialized in the relocate_section function. */ | |
1956 | if (info->shared | |
1957 | && (info->symbolic || h->dynindx == -1) | |
1958 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)) | |
1959 | { | |
1960 | rela.r_info = ELF32_R_INFO (0, R_68K_RELATIVE); | |
1961 | rela.r_addend = bfd_get_signed_32 (output_bfd, | |
1962 | (sgot->contents | |
dc810e39 | 1963 | + (h->got.offset &~ (bfd_vma) 1))); |
252b5132 RH |
1964 | } |
1965 | else | |
1966 | { | |
1967 | bfd_put_32 (output_bfd, (bfd_vma) 0, | |
dc810e39 | 1968 | sgot->contents + (h->got.offset &~ (bfd_vma) 1)); |
252b5132 RH |
1969 | rela.r_info = ELF32_R_INFO (h->dynindx, R_68K_GLOB_DAT); |
1970 | rela.r_addend = 0; | |
1971 | } | |
1972 | ||
947216bf AM |
1973 | loc = srela->contents; |
1974 | loc += srela->reloc_count++ * sizeof (Elf32_External_Rela); | |
1975 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); | |
252b5132 RH |
1976 | } |
1977 | ||
1978 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0) | |
1979 | { | |
1980 | asection *s; | |
1981 | Elf_Internal_Rela rela; | |
947216bf | 1982 | bfd_byte *loc; |
252b5132 RH |
1983 | |
1984 | /* This symbol needs a copy reloc. Set it up. */ | |
1985 | ||
1986 | BFD_ASSERT (h->dynindx != -1 | |
1987 | && (h->root.type == bfd_link_hash_defined | |
1988 | || h->root.type == bfd_link_hash_defweak)); | |
1989 | ||
1990 | s = bfd_get_section_by_name (h->root.u.def.section->owner, | |
1991 | ".rela.bss"); | |
1992 | BFD_ASSERT (s != NULL); | |
1993 | ||
1994 | rela.r_offset = (h->root.u.def.value | |
1995 | + h->root.u.def.section->output_section->vma | |
1996 | + h->root.u.def.section->output_offset); | |
1997 | rela.r_info = ELF32_R_INFO (h->dynindx, R_68K_COPY); | |
1998 | rela.r_addend = 0; | |
947216bf AM |
1999 | loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela); |
2000 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); | |
252b5132 RH |
2001 | } |
2002 | ||
2003 | /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */ | |
2004 | if (strcmp (h->root.root.string, "_DYNAMIC") == 0 | |
2005 | || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) | |
2006 | sym->st_shndx = SHN_ABS; | |
2007 | ||
b34976b6 | 2008 | return TRUE; |
252b5132 RH |
2009 | } |
2010 | ||
2011 | /* Finish up the dynamic sections. */ | |
2012 | ||
b34976b6 | 2013 | static bfd_boolean |
252b5132 RH |
2014 | elf_m68k_finish_dynamic_sections (output_bfd, info) |
2015 | bfd *output_bfd; | |
2016 | struct bfd_link_info *info; | |
2017 | { | |
2018 | bfd *dynobj; | |
2019 | asection *sgot; | |
2020 | asection *sdyn; | |
2021 | ||
2022 | dynobj = elf_hash_table (info)->dynobj; | |
2023 | ||
2024 | sgot = bfd_get_section_by_name (dynobj, ".got.plt"); | |
2025 | BFD_ASSERT (sgot != NULL); | |
2026 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); | |
2027 | ||
2028 | if (elf_hash_table (info)->dynamic_sections_created) | |
2029 | { | |
2030 | asection *splt; | |
2031 | Elf32_External_Dyn *dyncon, *dynconend; | |
2032 | ||
2033 | splt = bfd_get_section_by_name (dynobj, ".plt"); | |
2034 | BFD_ASSERT (splt != NULL && sdyn != NULL); | |
2035 | ||
2036 | dyncon = (Elf32_External_Dyn *) sdyn->contents; | |
2037 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size); | |
2038 | for (; dyncon < dynconend; dyncon++) | |
2039 | { | |
2040 | Elf_Internal_Dyn dyn; | |
2041 | const char *name; | |
2042 | asection *s; | |
2043 | ||
2044 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); | |
2045 | ||
2046 | switch (dyn.d_tag) | |
2047 | { | |
2048 | default: | |
2049 | break; | |
2050 | ||
2051 | case DT_PLTGOT: | |
2052 | name = ".got"; | |
2053 | goto get_vma; | |
2054 | case DT_JMPREL: | |
2055 | name = ".rela.plt"; | |
2056 | get_vma: | |
2057 | s = bfd_get_section_by_name (output_bfd, name); | |
2058 | BFD_ASSERT (s != NULL); | |
2059 | dyn.d_un.d_ptr = s->vma; | |
2060 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); | |
2061 | break; | |
2062 | ||
2063 | case DT_PLTRELSZ: | |
2064 | s = bfd_get_section_by_name (output_bfd, ".rela.plt"); | |
2065 | BFD_ASSERT (s != NULL); | |
2066 | if (s->_cooked_size != 0) | |
2067 | dyn.d_un.d_val = s->_cooked_size; | |
2068 | else | |
2069 | dyn.d_un.d_val = s->_raw_size; | |
2070 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); | |
2071 | break; | |
2072 | ||
2073 | case DT_RELASZ: | |
2074 | /* The procedure linkage table relocs (DT_JMPREL) should | |
2075 | not be included in the overall relocs (DT_RELA). | |
2076 | Therefore, we override the DT_RELASZ entry here to | |
2077 | make it not include the JMPREL relocs. Since the | |
2078 | linker script arranges for .rela.plt to follow all | |
2079 | other relocation sections, we don't have to worry | |
2080 | about changing the DT_RELA entry. */ | |
2081 | s = bfd_get_section_by_name (output_bfd, ".rela.plt"); | |
2082 | if (s != NULL) | |
2083 | { | |
2084 | if (s->_cooked_size != 0) | |
2085 | dyn.d_un.d_val -= s->_cooked_size; | |
2086 | else | |
2087 | dyn.d_un.d_val -= s->_raw_size; | |
2088 | } | |
2089 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); | |
2090 | break; | |
2091 | } | |
2092 | } | |
2093 | ||
2094 | /* Fill in the first entry in the procedure linkage table. */ | |
2095 | if (splt->_raw_size > 0) | |
2096 | { | |
9e1281c7 CM |
2097 | if (!CPU32_FLAG (output_bfd)) |
2098 | { | |
2099 | memcpy (splt->contents, elf_m68k_plt0_entry, PLT_ENTRY_SIZE); | |
2100 | bfd_put_32 (output_bfd, | |
2101 | (sgot->output_section->vma | |
2102 | + sgot->output_offset + 4 | |
2103 | - (splt->output_section->vma + 2)), | |
2104 | splt->contents + 4); | |
2105 | bfd_put_32 (output_bfd, | |
2106 | (sgot->output_section->vma | |
2107 | + sgot->output_offset + 8 | |
2108 | - (splt->output_section->vma + 10)), | |
2109 | splt->contents + 12); | |
c3668558 | 2110 | elf_section_data (splt->output_section)->this_hdr.sh_entsize |
9e1281c7 CM |
2111 | = PLT_ENTRY_SIZE; |
2112 | } | |
2113 | else /* cpu32 */ | |
2114 | { | |
2115 | memcpy (splt->contents, elf_cpu32_plt0_entry, PLT_CPU32_ENTRY_SIZE); | |
2116 | bfd_put_32 (output_bfd, | |
2117 | (sgot->output_section->vma | |
2118 | + sgot->output_offset + 4 | |
2119 | - (splt->output_section->vma + 2)), | |
2120 | splt->contents + 4); | |
2121 | bfd_put_32 (output_bfd, | |
2122 | (sgot->output_section->vma | |
2123 | + sgot->output_offset + 8 | |
2124 | - (splt->output_section->vma + 10)), | |
6091b433 | 2125 | splt->contents + 12); |
c3668558 | 2126 | elf_section_data (splt->output_section)->this_hdr.sh_entsize |
9e1281c7 CM |
2127 | = PLT_CPU32_ENTRY_SIZE; |
2128 | } | |
252b5132 | 2129 | } |
252b5132 RH |
2130 | } |
2131 | ||
2132 | /* Fill in the first three entries in the global offset table. */ | |
2133 | if (sgot->_raw_size > 0) | |
2134 | { | |
2135 | if (sdyn == NULL) | |
2136 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents); | |
2137 | else | |
2138 | bfd_put_32 (output_bfd, | |
2139 | sdyn->output_section->vma + sdyn->output_offset, | |
2140 | sgot->contents); | |
2141 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4); | |
2142 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8); | |
2143 | } | |
2144 | ||
2145 | elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4; | |
2146 | ||
b34976b6 | 2147 | return TRUE; |
252b5132 RH |
2148 | } |
2149 | ||
0752970e NC |
2150 | /* Given a .data section and a .emreloc in-memory section, store |
2151 | relocation information into the .emreloc section which can be | |
2152 | used at runtime to relocate the section. This is called by the | |
2153 | linker when the --embedded-relocs switch is used. This is called | |
2154 | after the add_symbols entry point has been called for all the | |
2155 | objects, and before the final_link entry point is called. */ | |
2156 | ||
b34976b6 | 2157 | bfd_boolean |
0752970e NC |
2158 | bfd_m68k_elf32_create_embedded_relocs (abfd, info, datasec, relsec, errmsg) |
2159 | bfd *abfd; | |
2160 | struct bfd_link_info *info; | |
2161 | asection *datasec; | |
2162 | asection *relsec; | |
2163 | char **errmsg; | |
2164 | { | |
2165 | Elf_Internal_Shdr *symtab_hdr; | |
6cdc0ccc AM |
2166 | Elf_Internal_Sym *isymbuf = NULL; |
2167 | Elf_Internal_Rela *internal_relocs = NULL; | |
0752970e NC |
2168 | Elf_Internal_Rela *irel, *irelend; |
2169 | bfd_byte *p; | |
dc810e39 | 2170 | bfd_size_type amt; |
0752970e NC |
2171 | |
2172 | BFD_ASSERT (! info->relocateable); | |
2173 | ||
2174 | *errmsg = NULL; | |
2175 | ||
2176 | if (datasec->reloc_count == 0) | |
b34976b6 | 2177 | return TRUE; |
0752970e NC |
2178 | |
2179 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
9ad5cbcf | 2180 | |
0752970e NC |
2181 | /* Get a copy of the native relocations. */ |
2182 | internal_relocs = (_bfd_elf32_link_read_relocs | |
2183 | (abfd, datasec, (PTR) NULL, (Elf_Internal_Rela *) NULL, | |
2184 | info->keep_memory)); | |
2185 | if (internal_relocs == NULL) | |
2186 | goto error_return; | |
0752970e | 2187 | |
dc810e39 AM |
2188 | amt = (bfd_size_type) datasec->reloc_count * 12; |
2189 | relsec->contents = (bfd_byte *) bfd_alloc (abfd, amt); | |
0752970e NC |
2190 | if (relsec->contents == NULL) |
2191 | goto error_return; | |
2192 | ||
2193 | p = relsec->contents; | |
2194 | ||
2195 | irelend = internal_relocs + datasec->reloc_count; | |
2196 | for (irel = internal_relocs; irel < irelend; irel++, p += 12) | |
2197 | { | |
2198 | asection *targetsec; | |
2199 | ||
2200 | /* We are going to write a four byte longword into the runtime | |
2201 | reloc section. The longword will be the address in the data | |
2202 | section which must be relocated. It is followed by the name | |
2203 | of the target section NUL-padded or truncated to 8 | |
2204 | characters. */ | |
2205 | ||
2206 | /* We can only relocate absolute longword relocs at run time. */ | |
2207 | if (ELF32_R_TYPE (irel->r_info) != (int) R_68K_32) | |
2208 | { | |
2209 | *errmsg = _("unsupported reloc type"); | |
2210 | bfd_set_error (bfd_error_bad_value); | |
2211 | goto error_return; | |
2212 | } | |
2213 | ||
2214 | /* Get the target section referred to by the reloc. */ | |
2215 | if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info) | |
2216 | { | |
0752970e | 2217 | /* A local symbol. */ |
6cdc0ccc AM |
2218 | Elf_Internal_Sym *isym; |
2219 | ||
2220 | /* Read this BFD's local symbols if we haven't done so already. */ | |
2221 | if (isymbuf == NULL) | |
2222 | { | |
2223 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; | |
2224 | if (isymbuf == NULL) | |
2225 | isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, | |
2226 | symtab_hdr->sh_info, 0, | |
2227 | NULL, NULL, NULL); | |
2228 | if (isymbuf == NULL) | |
2229 | goto error_return; | |
2230 | } | |
0752970e | 2231 | |
6cdc0ccc AM |
2232 | isym = isymbuf + ELF32_R_SYM (irel->r_info); |
2233 | targetsec = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
0752970e NC |
2234 | } |
2235 | else | |
2236 | { | |
2237 | unsigned long indx; | |
2238 | struct elf_link_hash_entry *h; | |
2239 | ||
2240 | /* An external symbol. */ | |
2241 | indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info; | |
2242 | h = elf_sym_hashes (abfd)[indx]; | |
2243 | BFD_ASSERT (h != NULL); | |
2244 | if (h->root.type == bfd_link_hash_defined | |
2245 | || h->root.type == bfd_link_hash_defweak) | |
2246 | targetsec = h->root.u.def.section; | |
2247 | else | |
2248 | targetsec = NULL; | |
2249 | } | |
2250 | ||
2251 | bfd_put_32 (abfd, irel->r_offset + datasec->output_offset, p); | |
2252 | memset (p + 4, 0, 8); | |
2253 | if (targetsec != NULL) | |
2254 | strncpy (p + 4, targetsec->output_section->name, 8); | |
2255 | } | |
c3668558 | 2256 | |
6cdc0ccc AM |
2257 | if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf) |
2258 | free (isymbuf); | |
2259 | if (internal_relocs != NULL | |
2260 | && elf_section_data (datasec)->relocs != internal_relocs) | |
2261 | free (internal_relocs); | |
b34976b6 | 2262 | return TRUE; |
0752970e NC |
2263 | |
2264 | error_return: | |
6cdc0ccc AM |
2265 | if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf) |
2266 | free (isymbuf); | |
2267 | if (internal_relocs != NULL | |
2268 | && elf_section_data (datasec)->relocs != internal_relocs) | |
2269 | free (internal_relocs); | |
b34976b6 | 2270 | return FALSE; |
0752970e NC |
2271 | } |
2272 | ||
aa91b392 | 2273 | static enum elf_reloc_type_class |
f51e552e AM |
2274 | elf32_m68k_reloc_type_class (rela) |
2275 | const Elf_Internal_Rela *rela; | |
aa91b392 | 2276 | { |
f51e552e | 2277 | switch ((int) ELF32_R_TYPE (rela->r_info)) |
aa91b392 AS |
2278 | { |
2279 | case R_68K_RELATIVE: | |
2280 | return reloc_class_relative; | |
2281 | case R_68K_JMP_SLOT: | |
2282 | return reloc_class_plt; | |
2283 | case R_68K_COPY: | |
2284 | return reloc_class_copy; | |
2285 | default: | |
2286 | return reloc_class_normal; | |
2287 | } | |
2288 | } | |
2289 | ||
252b5132 RH |
2290 | #define TARGET_BIG_SYM bfd_elf32_m68k_vec |
2291 | #define TARGET_BIG_NAME "elf32-m68k" | |
2292 | #define ELF_MACHINE_CODE EM_68K | |
2293 | #define ELF_MAXPAGESIZE 0x2000 | |
2294 | #define elf_backend_create_dynamic_sections \ | |
2295 | _bfd_elf_create_dynamic_sections | |
2296 | #define bfd_elf32_bfd_link_hash_table_create \ | |
2297 | elf_m68k_link_hash_table_create | |
2298 | #define bfd_elf32_bfd_final_link _bfd_elf32_gc_common_final_link | |
2299 | ||
2300 | #define elf_backend_check_relocs elf_m68k_check_relocs | |
2301 | #define elf_backend_adjust_dynamic_symbol \ | |
2302 | elf_m68k_adjust_dynamic_symbol | |
2303 | #define elf_backend_size_dynamic_sections \ | |
2304 | elf_m68k_size_dynamic_sections | |
2305 | #define elf_backend_relocate_section elf_m68k_relocate_section | |
2306 | #define elf_backend_finish_dynamic_symbol \ | |
2307 | elf_m68k_finish_dynamic_symbol | |
2308 | #define elf_backend_finish_dynamic_sections \ | |
2309 | elf_m68k_finish_dynamic_sections | |
2310 | #define elf_backend_gc_mark_hook elf_m68k_gc_mark_hook | |
2311 | #define elf_backend_gc_sweep_hook elf_m68k_gc_sweep_hook | |
9e1281c7 CM |
2312 | #define bfd_elf32_bfd_merge_private_bfd_data \ |
2313 | elf32_m68k_merge_private_bfd_data | |
2314 | #define bfd_elf32_bfd_set_private_flags \ | |
2315 | elf32_m68k_set_private_flags | |
2316 | #define bfd_elf32_bfd_print_private_bfd_data \ | |
2317 | elf32_m68k_print_private_bfd_data | |
aa91b392 | 2318 | #define elf_backend_reloc_type_class elf32_m68k_reloc_type_class |
9e1281c7 | 2319 | |
252b5132 | 2320 | #define elf_backend_can_gc_sections 1 |
51b64d56 | 2321 | #define elf_backend_can_refcount 1 |
252b5132 RH |
2322 | #define elf_backend_want_got_plt 1 |
2323 | #define elf_backend_plt_readonly 1 | |
2324 | #define elf_backend_want_plt_sym 0 | |
2325 | #define elf_backend_got_header_size 12 | |
b491616a | 2326 | #define elf_backend_rela_normal 1 |
252b5132 RH |
2327 | |
2328 | #include "elf32-target.h" |