Commit | Line | Data |
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252b5132 | 1 | /* Motorola 68k series support for 32-bit ELF |
e92d460e | 2 | Copyright 1993, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002 |
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 | 691 | } |
aa91b392 AS |
692 | if (sec->flags & SEC_READONLY) |
693 | info->flags |= DF_TEXTREL; | |
252b5132 RH |
694 | } |
695 | ||
696 | sreloc->_raw_size += sizeof (Elf32_External_Rela); | |
697 | ||
b6152c34 AS |
698 | /* We count the number of PC relative relocations we have |
699 | entered for this symbol, so that we can discard them | |
700 | again if, in the -Bsymbolic case, the symbol is later | |
701 | defined by a regular object, or, in the normal shared | |
702 | case, the symbol is forced to be local. Note that this | |
703 | function is only called if we are using an m68kelf linker | |
704 | hash table, which means that h is really a pointer to an | |
252b5132 | 705 | elf_m68k_link_hash_entry. */ |
b6152c34 AS |
706 | if (ELF32_R_TYPE (rel->r_info) == R_68K_PC8 |
707 | || ELF32_R_TYPE (rel->r_info) == R_68K_PC16 | |
708 | || ELF32_R_TYPE (rel->r_info) == R_68K_PC32) | |
252b5132 | 709 | { |
252b5132 | 710 | struct elf_m68k_pcrel_relocs_copied *p; |
b6152c34 AS |
711 | struct elf_m68k_pcrel_relocs_copied **head; |
712 | ||
713 | if (h != NULL) | |
714 | { | |
715 | struct elf_m68k_link_hash_entry *eh | |
716 | = (struct elf_m68k_link_hash_entry *) h; | |
717 | head = &eh->pcrel_relocs_copied; | |
718 | } | |
719 | else | |
720 | { | |
721 | asection *s; | |
722 | s = (bfd_section_from_r_symndx | |
723 | (abfd, &elf_m68k_hash_table (info)->sym_sec, | |
724 | sec, r_symndx)); | |
725 | if (s == NULL) | |
726 | return FALSE; | |
252b5132 | 727 | |
b6152c34 AS |
728 | head = ((struct elf_m68k_pcrel_relocs_copied **) |
729 | &elf_section_data (s)->local_dynrel); | |
730 | } | |
252b5132 | 731 | |
b6152c34 | 732 | for (p = *head; p != NULL; p = p->next) |
252b5132 RH |
733 | if (p->section == sreloc) |
734 | break; | |
735 | ||
736 | if (p == NULL) | |
737 | { | |
738 | p = ((struct elf_m68k_pcrel_relocs_copied *) | |
dc810e39 | 739 | bfd_alloc (dynobj, (bfd_size_type) sizeof *p)); |
252b5132 | 740 | if (p == NULL) |
b34976b6 | 741 | return FALSE; |
b6152c34 AS |
742 | p->next = *head; |
743 | *head = p; | |
252b5132 RH |
744 | p->section = sreloc; |
745 | p->count = 0; | |
746 | } | |
747 | ||
748 | ++p->count; | |
749 | } | |
750 | } | |
751 | ||
752 | break; | |
753 | ||
754 | /* This relocation describes the C++ object vtable hierarchy. | |
755 | Reconstruct it for later use during GC. */ | |
756 | case R_68K_GNU_VTINHERIT: | |
757 | if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) | |
b34976b6 | 758 | return FALSE; |
252b5132 RH |
759 | break; |
760 | ||
761 | /* This relocation describes which C++ vtable entries are actually | |
762 | used. Record for later use during GC. */ | |
763 | case R_68K_GNU_VTENTRY: | |
764 | if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_addend)) | |
b34976b6 | 765 | return FALSE; |
252b5132 RH |
766 | break; |
767 | ||
768 | default: | |
769 | break; | |
770 | } | |
771 | } | |
772 | ||
b34976b6 | 773 | return TRUE; |
252b5132 RH |
774 | } |
775 | ||
776 | /* Return the section that should be marked against GC for a given | |
777 | relocation. */ | |
778 | ||
779 | static asection * | |
1e2f5b6e AM |
780 | elf_m68k_gc_mark_hook (sec, info, rel, h, sym) |
781 | asection *sec; | |
121089cb | 782 | struct bfd_link_info *info ATTRIBUTE_UNUSED; |
252b5132 RH |
783 | Elf_Internal_Rela *rel; |
784 | struct elf_link_hash_entry *h; | |
785 | Elf_Internal_Sym *sym; | |
786 | { | |
787 | if (h != NULL) | |
788 | { | |
789 | switch (ELF32_R_TYPE (rel->r_info)) | |
790 | { | |
791 | case R_68K_GNU_VTINHERIT: | |
792 | case R_68K_GNU_VTENTRY: | |
793 | break; | |
794 | ||
795 | default: | |
796 | switch (h->root.type) | |
797 | { | |
798 | default: | |
799 | break; | |
800 | ||
801 | case bfd_link_hash_defined: | |
802 | case bfd_link_hash_defweak: | |
803 | return h->root.u.def.section; | |
804 | ||
805 | case bfd_link_hash_common: | |
806 | return h->root.u.c.p->section; | |
807 | } | |
808 | } | |
809 | } | |
810 | else | |
1e2f5b6e | 811 | return bfd_section_from_elf_index (sec->owner, sym->st_shndx); |
252b5132 RH |
812 | |
813 | return NULL; | |
814 | } | |
815 | ||
816 | /* Update the got entry reference counts for the section being removed. */ | |
817 | ||
b34976b6 | 818 | static bfd_boolean |
252b5132 RH |
819 | elf_m68k_gc_sweep_hook (abfd, info, sec, relocs) |
820 | bfd *abfd; | |
821 | struct bfd_link_info *info; | |
822 | asection *sec; | |
823 | const Elf_Internal_Rela *relocs; | |
824 | { | |
825 | Elf_Internal_Shdr *symtab_hdr; | |
826 | struct elf_link_hash_entry **sym_hashes; | |
827 | bfd_signed_vma *local_got_refcounts; | |
828 | const Elf_Internal_Rela *rel, *relend; | |
829 | unsigned long r_symndx; | |
830 | struct elf_link_hash_entry *h; | |
831 | bfd *dynobj; | |
dd5724d5 AM |
832 | asection *sgot; |
833 | asection *srelgot; | |
252b5132 RH |
834 | |
835 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
836 | sym_hashes = elf_sym_hashes (abfd); | |
837 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
838 | ||
839 | dynobj = elf_hash_table (info)->dynobj; | |
dd5724d5 | 840 | if (dynobj == NULL) |
b34976b6 | 841 | return TRUE; |
dd5724d5 AM |
842 | |
843 | sgot = bfd_get_section_by_name (dynobj, ".got"); | |
844 | srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); | |
252b5132 RH |
845 | |
846 | relend = relocs + sec->reloc_count; | |
847 | for (rel = relocs; rel < relend; rel++) | |
848 | { | |
849 | switch (ELF32_R_TYPE (rel->r_info)) | |
850 | { | |
851 | case R_68K_GOT8: | |
852 | case R_68K_GOT16: | |
853 | case R_68K_GOT32: | |
854 | case R_68K_GOT8O: | |
855 | case R_68K_GOT16O: | |
856 | case R_68K_GOT32O: | |
857 | r_symndx = ELF32_R_SYM (rel->r_info); | |
858 | if (r_symndx >= symtab_hdr->sh_info) | |
859 | { | |
860 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
861 | if (h->got.refcount > 0) | |
862 | { | |
863 | --h->got.refcount; | |
864 | if (h->got.refcount == 0) | |
865 | { | |
866 | /* We don't need the .got entry any more. */ | |
867 | sgot->_raw_size -= 4; | |
868 | srelgot->_raw_size -= sizeof (Elf32_External_Rela); | |
869 | } | |
870 | } | |
871 | } | |
dd5724d5 | 872 | else if (local_got_refcounts != NULL) |
252b5132 RH |
873 | { |
874 | if (local_got_refcounts[r_symndx] > 0) | |
875 | { | |
876 | --local_got_refcounts[r_symndx]; | |
877 | if (local_got_refcounts[r_symndx] == 0) | |
878 | { | |
879 | /* We don't need the .got entry any more. */ | |
880 | sgot->_raw_size -= 4; | |
881 | if (info->shared) | |
882 | srelgot->_raw_size -= sizeof (Elf32_External_Rela); | |
883 | } | |
884 | } | |
885 | } | |
886 | break; | |
887 | ||
888 | case R_68K_PLT8: | |
889 | case R_68K_PLT16: | |
890 | case R_68K_PLT32: | |
891 | case R_68K_PLT8O: | |
892 | case R_68K_PLT16O: | |
893 | case R_68K_PLT32O: | |
894 | case R_68K_PC8: | |
895 | case R_68K_PC16: | |
896 | case R_68K_PC32: | |
897 | case R_68K_8: | |
898 | case R_68K_16: | |
899 | case R_68K_32: | |
900 | r_symndx = ELF32_R_SYM (rel->r_info); | |
901 | if (r_symndx >= symtab_hdr->sh_info) | |
902 | { | |
903 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
904 | if (h->plt.refcount > 0) | |
905 | --h->plt.refcount; | |
906 | } | |
907 | break; | |
908 | ||
909 | default: | |
910 | break; | |
911 | } | |
912 | } | |
913 | ||
b34976b6 | 914 | return TRUE; |
252b5132 RH |
915 | } |
916 | ||
252b5132 RH |
917 | /* Adjust a symbol defined by a dynamic object and referenced by a |
918 | regular object. The current definition is in some section of the | |
919 | dynamic object, but we're not including those sections. We have to | |
920 | change the definition to something the rest of the link can | |
921 | understand. */ | |
922 | ||
b34976b6 | 923 | static bfd_boolean |
252b5132 RH |
924 | elf_m68k_adjust_dynamic_symbol (info, h) |
925 | struct bfd_link_info *info; | |
926 | struct elf_link_hash_entry *h; | |
927 | { | |
928 | bfd *dynobj; | |
929 | asection *s; | |
930 | unsigned int power_of_two; | |
931 | ||
932 | dynobj = elf_hash_table (info)->dynobj; | |
933 | ||
934 | /* Make sure we know what is going on here. */ | |
935 | BFD_ASSERT (dynobj != NULL | |
936 | && ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) | |
937 | || h->weakdef != NULL | |
938 | || ((h->elf_link_hash_flags | |
939 | & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
940 | && (h->elf_link_hash_flags | |
941 | & ELF_LINK_HASH_REF_REGULAR) != 0 | |
942 | && (h->elf_link_hash_flags | |
943 | & ELF_LINK_HASH_DEF_REGULAR) == 0))); | |
944 | ||
945 | /* If this is a function, put it in the procedure linkage table. We | |
946 | will fill in the contents of the procedure linkage table later, | |
947 | when we know the address of the .got section. */ | |
948 | if (h->type == STT_FUNC | |
949 | || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0) | |
950 | { | |
951 | if (! info->shared | |
952 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0 | |
953 | && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) == 0 | |
954 | /* We must always create the plt entry if it was referenced | |
955 | by a PLTxxO relocation. In this case we already recorded | |
956 | it as a dynamic symbol. */ | |
957 | && h->dynindx == -1) | |
958 | { | |
959 | /* This case can occur if we saw a PLTxx reloc in an input | |
960 | file, but the symbol was never referred to by a dynamic | |
961 | object. In such a case, we don't actually need to build | |
962 | a procedure linkage table, and we can just do a PCxx | |
963 | reloc instead. */ | |
964 | BFD_ASSERT ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0); | |
965 | h->plt.offset = (bfd_vma) -1; | |
b34976b6 | 966 | return TRUE; |
252b5132 RH |
967 | } |
968 | ||
969 | /* GC may have rendered this entry unused. */ | |
970 | if (h->plt.refcount <= 0) | |
971 | { | |
972 | h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; | |
973 | h->plt.offset = (bfd_vma) -1; | |
b34976b6 | 974 | return TRUE; |
252b5132 RH |
975 | } |
976 | ||
977 | /* Make sure this symbol is output as a dynamic symbol. */ | |
b6152c34 AS |
978 | if (h->dynindx == -1 |
979 | && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) | |
252b5132 RH |
980 | { |
981 | if (! bfd_elf32_link_record_dynamic_symbol (info, h)) | |
b34976b6 | 982 | return FALSE; |
252b5132 RH |
983 | } |
984 | ||
985 | s = bfd_get_section_by_name (dynobj, ".plt"); | |
986 | BFD_ASSERT (s != NULL); | |
987 | ||
988 | /* If this is the first .plt entry, make room for the special | |
989 | first entry. */ | |
990 | if (s->_raw_size == 0) | |
70f06c4a AS |
991 | { |
992 | if (CPU32_FLAG (dynobj)) | |
993 | s->_raw_size += PLT_CPU32_ENTRY_SIZE; | |
994 | else | |
995 | s->_raw_size += PLT_ENTRY_SIZE; | |
996 | } | |
252b5132 RH |
997 | |
998 | /* If this symbol is not defined in a regular file, and we are | |
999 | not generating a shared library, then set the symbol to this | |
1000 | location in the .plt. This is required to make function | |
1001 | pointers compare as equal between the normal executable and | |
1002 | the shared library. */ | |
1003 | if (!info->shared | |
1004 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
1005 | { | |
1006 | h->root.u.def.section = s; | |
1007 | h->root.u.def.value = s->_raw_size; | |
1008 | } | |
1009 | ||
1010 | h->plt.offset = s->_raw_size; | |
1011 | ||
1012 | /* Make room for this entry. */ | |
9e1281c7 CM |
1013 | if (CPU32_FLAG (dynobj)) |
1014 | s->_raw_size += PLT_CPU32_ENTRY_SIZE; | |
1015 | else | |
1016 | s->_raw_size += PLT_ENTRY_SIZE; | |
252b5132 RH |
1017 | |
1018 | /* We also need to make an entry in the .got.plt section, which | |
1019 | will be placed in the .got section by the linker script. */ | |
1020 | ||
1021 | s = bfd_get_section_by_name (dynobj, ".got.plt"); | |
1022 | BFD_ASSERT (s != NULL); | |
1023 | s->_raw_size += 4; | |
1024 | ||
1025 | /* We also need to make an entry in the .rela.plt section. */ | |
1026 | ||
1027 | s = bfd_get_section_by_name (dynobj, ".rela.plt"); | |
1028 | BFD_ASSERT (s != NULL); | |
1029 | s->_raw_size += sizeof (Elf32_External_Rela); | |
1030 | ||
b34976b6 | 1031 | return TRUE; |
252b5132 RH |
1032 | } |
1033 | ||
1034 | /* Reinitialize the plt offset now that it is not used as a reference | |
1035 | count any more. */ | |
1036 | h->plt.offset = (bfd_vma) -1; | |
1037 | ||
1038 | /* If this is a weak symbol, and there is a real definition, the | |
1039 | processor independent code will have arranged for us to see the | |
1040 | real definition first, and we can just use the same value. */ | |
1041 | if (h->weakdef != NULL) | |
1042 | { | |
1043 | BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined | |
1044 | || h->weakdef->root.type == bfd_link_hash_defweak); | |
1045 | h->root.u.def.section = h->weakdef->root.u.def.section; | |
1046 | h->root.u.def.value = h->weakdef->root.u.def.value; | |
b34976b6 | 1047 | return TRUE; |
252b5132 RH |
1048 | } |
1049 | ||
1050 | /* This is a reference to a symbol defined by a dynamic object which | |
1051 | is not a function. */ | |
1052 | ||
1053 | /* If we are creating a shared library, we must presume that the | |
1054 | only references to the symbol are via the global offset table. | |
1055 | For such cases we need not do anything here; the relocations will | |
1056 | be handled correctly by relocate_section. */ | |
1057 | if (info->shared) | |
b34976b6 | 1058 | return TRUE; |
252b5132 RH |
1059 | |
1060 | /* We must allocate the symbol in our .dynbss section, which will | |
1061 | become part of the .bss section of the executable. There will be | |
1062 | an entry for this symbol in the .dynsym section. The dynamic | |
1063 | object will contain position independent code, so all references | |
1064 | from the dynamic object to this symbol will go through the global | |
1065 | offset table. The dynamic linker will use the .dynsym entry to | |
1066 | determine the address it must put in the global offset table, so | |
1067 | both the dynamic object and the regular object will refer to the | |
1068 | same memory location for the variable. */ | |
1069 | ||
1070 | s = bfd_get_section_by_name (dynobj, ".dynbss"); | |
1071 | BFD_ASSERT (s != NULL); | |
1072 | ||
1073 | /* We must generate a R_68K_COPY reloc to tell the dynamic linker to | |
1074 | copy the initial value out of the dynamic object and into the | |
1075 | runtime process image. We need to remember the offset into the | |
1076 | .rela.bss section we are going to use. */ | |
1077 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) | |
1078 | { | |
1079 | asection *srel; | |
1080 | ||
1081 | srel = bfd_get_section_by_name (dynobj, ".rela.bss"); | |
1082 | BFD_ASSERT (srel != NULL); | |
1083 | srel->_raw_size += sizeof (Elf32_External_Rela); | |
1084 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY; | |
1085 | } | |
1086 | ||
1087 | /* We need to figure out the alignment required for this symbol. I | |
1088 | have no idea how ELF linkers handle this. */ | |
1089 | power_of_two = bfd_log2 (h->size); | |
1090 | if (power_of_two > 3) | |
1091 | power_of_two = 3; | |
1092 | ||
1093 | /* Apply the required alignment. */ | |
1094 | s->_raw_size = BFD_ALIGN (s->_raw_size, | |
1095 | (bfd_size_type) (1 << power_of_two)); | |
1096 | if (power_of_two > bfd_get_section_alignment (dynobj, s)) | |
1097 | { | |
1098 | if (!bfd_set_section_alignment (dynobj, s, power_of_two)) | |
b34976b6 | 1099 | return FALSE; |
252b5132 RH |
1100 | } |
1101 | ||
1102 | /* Define the symbol as being at this point in the section. */ | |
1103 | h->root.u.def.section = s; | |
1104 | h->root.u.def.value = s->_raw_size; | |
1105 | ||
1106 | /* Increment the section size to make room for the symbol. */ | |
1107 | s->_raw_size += h->size; | |
1108 | ||
b34976b6 | 1109 | return TRUE; |
252b5132 RH |
1110 | } |
1111 | ||
1112 | /* Set the sizes of the dynamic sections. */ | |
1113 | ||
b34976b6 | 1114 | static bfd_boolean |
252b5132 | 1115 | elf_m68k_size_dynamic_sections (output_bfd, info) |
aa91b392 | 1116 | bfd *output_bfd ATTRIBUTE_UNUSED; |
252b5132 RH |
1117 | struct bfd_link_info *info; |
1118 | { | |
1119 | bfd *dynobj; | |
1120 | asection *s; | |
b34976b6 AM |
1121 | bfd_boolean plt; |
1122 | bfd_boolean relocs; | |
252b5132 RH |
1123 | |
1124 | dynobj = elf_hash_table (info)->dynobj; | |
1125 | BFD_ASSERT (dynobj != NULL); | |
1126 | ||
1127 | if (elf_hash_table (info)->dynamic_sections_created) | |
1128 | { | |
1129 | /* Set the contents of the .interp section to the interpreter. */ | |
1130 | if (!info->shared) | |
1131 | { | |
1132 | s = bfd_get_section_by_name (dynobj, ".interp"); | |
1133 | BFD_ASSERT (s != NULL); | |
1134 | s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER; | |
1135 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; | |
1136 | } | |
1137 | } | |
1138 | else | |
1139 | { | |
1140 | /* We may have created entries in the .rela.got section. | |
1141 | However, if we are not creating the dynamic sections, we will | |
1142 | not actually use these entries. Reset the size of .rela.got, | |
1143 | which will cause it to get stripped from the output file | |
1144 | below. */ | |
1145 | s = bfd_get_section_by_name (dynobj, ".rela.got"); | |
1146 | if (s != NULL) | |
1147 | s->_raw_size = 0; | |
1148 | } | |
1149 | ||
b6152c34 AS |
1150 | /* If this is a -Bsymbolic shared link, then we need to discard all |
1151 | PC relative relocs against symbols defined in a regular object. | |
1152 | For the normal shared case we discard the PC relative relocs | |
1153 | against symbols that have become local due to visibility changes. | |
1154 | We allocated space for them in the check_relocs routine, but we | |
1155 | will not fill them in in the relocate_section routine. */ | |
1156 | if (info->shared) | |
252b5132 RH |
1157 | elf_m68k_link_hash_traverse (elf_m68k_hash_table (info), |
1158 | elf_m68k_discard_copies, | |
b6152c34 | 1159 | (PTR) info); |
252b5132 RH |
1160 | |
1161 | /* The check_relocs and adjust_dynamic_symbol entry points have | |
1162 | determined the sizes of the various dynamic sections. Allocate | |
1163 | memory for them. */ | |
b34976b6 AM |
1164 | plt = FALSE; |
1165 | relocs = FALSE; | |
252b5132 RH |
1166 | for (s = dynobj->sections; s != NULL; s = s->next) |
1167 | { | |
1168 | const char *name; | |
b34976b6 | 1169 | bfd_boolean strip; |
252b5132 RH |
1170 | |
1171 | if ((s->flags & SEC_LINKER_CREATED) == 0) | |
1172 | continue; | |
1173 | ||
1174 | /* It's OK to base decisions on the section name, because none | |
1175 | of the dynobj section names depend upon the input files. */ | |
1176 | name = bfd_get_section_name (dynobj, s); | |
1177 | ||
b34976b6 | 1178 | strip = FALSE; |
252b5132 RH |
1179 | |
1180 | if (strcmp (name, ".plt") == 0) | |
1181 | { | |
1182 | if (s->_raw_size == 0) | |
1183 | { | |
1184 | /* Strip this section if we don't need it; see the | |
1185 | comment below. */ | |
b34976b6 | 1186 | strip = TRUE; |
252b5132 RH |
1187 | } |
1188 | else | |
1189 | { | |
1190 | /* Remember whether there is a PLT. */ | |
b34976b6 | 1191 | plt = TRUE; |
252b5132 RH |
1192 | } |
1193 | } | |
1194 | else if (strncmp (name, ".rela", 5) == 0) | |
1195 | { | |
1196 | if (s->_raw_size == 0) | |
1197 | { | |
1198 | /* If we don't need this section, strip it from the | |
1199 | output file. This is mostly to handle .rela.bss and | |
1200 | .rela.plt. We must create both sections in | |
1201 | create_dynamic_sections, because they must be created | |
1202 | before the linker maps input sections to output | |
1203 | sections. The linker does that before | |
1204 | adjust_dynamic_symbol is called, and it is that | |
1205 | function which decides whether anything needs to go | |
1206 | into these sections. */ | |
b34976b6 | 1207 | strip = TRUE; |
252b5132 RH |
1208 | } |
1209 | else | |
1210 | { | |
b34976b6 | 1211 | relocs = TRUE; |
252b5132 RH |
1212 | |
1213 | /* We use the reloc_count field as a counter if we need | |
1214 | to copy relocs into the output file. */ | |
1215 | s->reloc_count = 0; | |
1216 | } | |
1217 | } | |
1218 | else if (strncmp (name, ".got", 4) != 0) | |
1219 | { | |
1220 | /* It's not one of our sections, so don't allocate space. */ | |
1221 | continue; | |
1222 | } | |
1223 | ||
1224 | if (strip) | |
1225 | { | |
7f8d5fc9 | 1226 | _bfd_strip_section_from_output (info, s); |
252b5132 RH |
1227 | continue; |
1228 | } | |
1229 | ||
1230 | /* Allocate memory for the section contents. */ | |
7a9af8c4 NC |
1231 | /* FIXME: This should be a call to bfd_alloc not bfd_zalloc. |
1232 | Unused entries should be reclaimed before the section's contents | |
1233 | are written out, but at the moment this does not happen. Thus in | |
1234 | order to prevent writing out garbage, we initialise the section's | |
1235 | contents to zero. */ | |
1236 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size); | |
252b5132 | 1237 | if (s->contents == NULL && s->_raw_size != 0) |
b34976b6 | 1238 | return FALSE; |
252b5132 RH |
1239 | } |
1240 | ||
1241 | if (elf_hash_table (info)->dynamic_sections_created) | |
1242 | { | |
1243 | /* Add some entries to the .dynamic section. We fill in the | |
1244 | values later, in elf_m68k_finish_dynamic_sections, but we | |
1245 | must add the entries now so that we get the correct size for | |
1246 | the .dynamic section. The DT_DEBUG entry is filled in by the | |
1247 | dynamic linker and used by the debugger. */ | |
dc810e39 AM |
1248 | #define add_dynamic_entry(TAG, VAL) \ |
1249 | bfd_elf32_add_dynamic_entry (info, (bfd_vma) (TAG), (bfd_vma) (VAL)) | |
1250 | ||
252b5132 RH |
1251 | if (!info->shared) |
1252 | { | |
dc810e39 | 1253 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
b34976b6 | 1254 | return FALSE; |
252b5132 RH |
1255 | } |
1256 | ||
1257 | if (plt) | |
1258 | { | |
dc810e39 AM |
1259 | if (!add_dynamic_entry (DT_PLTGOT, 0) |
1260 | || !add_dynamic_entry (DT_PLTRELSZ, 0) | |
1261 | || !add_dynamic_entry (DT_PLTREL, DT_RELA) | |
1262 | || !add_dynamic_entry (DT_JMPREL, 0)) | |
b34976b6 | 1263 | return FALSE; |
252b5132 RH |
1264 | } |
1265 | ||
1266 | if (relocs) | |
1267 | { | |
dc810e39 AM |
1268 | if (!add_dynamic_entry (DT_RELA, 0) |
1269 | || !add_dynamic_entry (DT_RELASZ, 0) | |
1270 | || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela))) | |
b34976b6 | 1271 | return FALSE; |
252b5132 RH |
1272 | } |
1273 | ||
aa91b392 | 1274 | if ((info->flags & DF_TEXTREL) != 0) |
252b5132 | 1275 | { |
dc810e39 | 1276 | if (!add_dynamic_entry (DT_TEXTREL, 0)) |
b34976b6 | 1277 | return FALSE; |
252b5132 RH |
1278 | } |
1279 | } | |
dc810e39 | 1280 | #undef add_dynamic_entry |
252b5132 | 1281 | |
b34976b6 | 1282 | return TRUE; |
252b5132 RH |
1283 | } |
1284 | ||
1285 | /* This function is called via elf_m68k_link_hash_traverse if we are | |
b6152c34 AS |
1286 | creating a shared object. In the -Bsymbolic case it discards the |
1287 | space allocated to copy PC relative relocs against symbols which | |
1288 | are defined in regular objects. For the normal shared case, if | |
1289 | discards space for pc-relative relocs that have become local due to | |
1290 | symbol visibility changes. We allocated space for them in the | |
1291 | check_relocs routine, but we won't fill them in in the | |
1292 | relocate_section routine. */ | |
252b5132 | 1293 | |
b34976b6 | 1294 | static bfd_boolean |
b6152c34 | 1295 | elf_m68k_discard_copies (h, inf) |
252b5132 | 1296 | struct elf_m68k_link_hash_entry *h; |
b6152c34 | 1297 | PTR inf; |
252b5132 | 1298 | { |
b6152c34 | 1299 | struct bfd_link_info *info = (struct bfd_link_info *) inf; |
252b5132 RH |
1300 | struct elf_m68k_pcrel_relocs_copied *s; |
1301 | ||
e92d460e AM |
1302 | if (h->root.root.type == bfd_link_hash_warning) |
1303 | h = (struct elf_m68k_link_hash_entry *) h->root.root.u.i.link; | |
1304 | ||
b6152c34 AS |
1305 | if ((h->root.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0 |
1306 | || (!info->symbolic | |
1307 | && (h->root.elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)) | |
b34976b6 | 1308 | return TRUE; |
252b5132 RH |
1309 | |
1310 | for (s = h->pcrel_relocs_copied; s != NULL; s = s->next) | |
1311 | s->section->_raw_size -= s->count * sizeof (Elf32_External_Rela); | |
1312 | ||
b34976b6 | 1313 | return TRUE; |
252b5132 RH |
1314 | } |
1315 | ||
1316 | /* Relocate an M68K ELF section. */ | |
1317 | ||
b34976b6 | 1318 | static bfd_boolean |
252b5132 RH |
1319 | elf_m68k_relocate_section (output_bfd, info, input_bfd, input_section, |
1320 | contents, relocs, local_syms, local_sections) | |
1321 | bfd *output_bfd; | |
1322 | struct bfd_link_info *info; | |
1323 | bfd *input_bfd; | |
1324 | asection *input_section; | |
1325 | bfd_byte *contents; | |
1326 | Elf_Internal_Rela *relocs; | |
1327 | Elf_Internal_Sym *local_syms; | |
1328 | asection **local_sections; | |
1329 | { | |
1330 | bfd *dynobj; | |
1331 | Elf_Internal_Shdr *symtab_hdr; | |
1332 | struct elf_link_hash_entry **sym_hashes; | |
1333 | bfd_vma *local_got_offsets; | |
1334 | asection *sgot; | |
1335 | asection *splt; | |
1336 | asection *sreloc; | |
1337 | Elf_Internal_Rela *rel; | |
1338 | Elf_Internal_Rela *relend; | |
1339 | ||
b491616a | 1340 | if (info->relocateable) |
b34976b6 | 1341 | return TRUE; |
b491616a | 1342 | |
252b5132 RH |
1343 | dynobj = elf_hash_table (info)->dynobj; |
1344 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
1345 | sym_hashes = elf_sym_hashes (input_bfd); | |
1346 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
1347 | ||
1348 | sgot = NULL; | |
1349 | splt = NULL; | |
1350 | sreloc = NULL; | |
1351 | ||
1352 | rel = relocs; | |
1353 | relend = relocs + input_section->reloc_count; | |
1354 | for (; rel < relend; rel++) | |
1355 | { | |
1356 | int r_type; | |
1357 | reloc_howto_type *howto; | |
1358 | unsigned long r_symndx; | |
1359 | struct elf_link_hash_entry *h; | |
1360 | Elf_Internal_Sym *sym; | |
1361 | asection *sec; | |
1362 | bfd_vma relocation; | |
1363 | bfd_reloc_status_type r; | |
1364 | ||
1365 | r_type = ELF32_R_TYPE (rel->r_info); | |
1366 | if (r_type < 0 || r_type >= (int) R_68K_max) | |
1367 | { | |
1368 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 1369 | return FALSE; |
252b5132 RH |
1370 | } |
1371 | howto = howto_table + r_type; | |
1372 | ||
1373 | r_symndx = ELF32_R_SYM (rel->r_info); | |
1374 | ||
252b5132 RH |
1375 | h = NULL; |
1376 | sym = NULL; | |
1377 | sec = NULL; | |
1378 | if (r_symndx < symtab_hdr->sh_info) | |
1379 | { | |
1380 | sym = local_syms + r_symndx; | |
1381 | sec = local_sections[r_symndx]; | |
f8df10f4 | 1382 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, sec, rel); |
252b5132 RH |
1383 | } |
1384 | else | |
1385 | { | |
1386 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
1387 | while (h->root.type == bfd_link_hash_indirect | |
1388 | || h->root.type == bfd_link_hash_warning) | |
1389 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1390 | if (h->root.type == bfd_link_hash_defined | |
1391 | || h->root.type == bfd_link_hash_defweak) | |
1392 | { | |
1393 | sec = h->root.u.def.section; | |
1394 | if (((r_type == R_68K_PLT8 | |
1395 | || r_type == R_68K_PLT16 | |
1396 | || r_type == R_68K_PLT32 | |
1397 | || r_type == R_68K_PLT8O | |
1398 | || r_type == R_68K_PLT16O | |
1399 | || r_type == R_68K_PLT32O) | |
1400 | && h->plt.offset != (bfd_vma) -1 | |
1401 | && elf_hash_table (info)->dynamic_sections_created) | |
1402 | || ((r_type == R_68K_GOT8O | |
1403 | || r_type == R_68K_GOT16O | |
1404 | || r_type == R_68K_GOT32O | |
1405 | || ((r_type == R_68K_GOT8 | |
1406 | || r_type == R_68K_GOT16 | |
1407 | || r_type == R_68K_GOT32) | |
1408 | && strcmp (h->root.root.string, | |
1409 | "_GLOBAL_OFFSET_TABLE_") != 0)) | |
1410 | && elf_hash_table (info)->dynamic_sections_created | |
1411 | && (! info->shared | |
1412 | || (! info->symbolic && h->dynindx != -1) | |
1413 | || (h->elf_link_hash_flags | |
1414 | & ELF_LINK_HASH_DEF_REGULAR) == 0)) | |
1415 | || (info->shared | |
1416 | && ((! info->symbolic && h->dynindx != -1) | |
1417 | || (h->elf_link_hash_flags | |
1418 | & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
95fc45e6 AS |
1419 | && ((input_section->flags & SEC_ALLOC) != 0 |
1420 | /* DWARF will emit R_68K_32 relocations in its | |
1421 | sections against symbols defined externally | |
1422 | in shared libraries. We can't do anything | |
1423 | with them here. */ | |
1424 | || ((input_section->flags & SEC_DEBUGGING) != 0 | |
1425 | && (h->elf_link_hash_flags | |
1426 | & ELF_LINK_HASH_DEF_DYNAMIC) != 0)) | |
252b5132 RH |
1427 | && (r_type == R_68K_8 |
1428 | || r_type == R_68K_16 | |
1429 | || r_type == R_68K_32 | |
1430 | || r_type == R_68K_PC8 | |
1431 | || r_type == R_68K_PC16 | |
1432 | || r_type == R_68K_PC32))) | |
1433 | { | |
1434 | /* In these cases, we don't need the relocation | |
1435 | value. We check specially because in some | |
1436 | obscure cases sec->output_section will be NULL. */ | |
1437 | relocation = 0; | |
1438 | } | |
1439 | else | |
1440 | relocation = (h->root.u.def.value | |
1441 | + sec->output_section->vma | |
1442 | + sec->output_offset); | |
1443 | } | |
1444 | else if (h->root.type == bfd_link_hash_undefweak) | |
1445 | relocation = 0; | |
671bae9c NC |
1446 | else if (info->shared |
1447 | && (!info->symbolic || info->allow_shlib_undefined) | |
3a27a730 L |
1448 | && !info->no_undefined |
1449 | && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) | |
252b5132 RH |
1450 | relocation = 0; |
1451 | else | |
1452 | { | |
1453 | if (!(info->callbacks->undefined_symbol | |
1454 | (info, h->root.root.string, input_bfd, | |
5cc7c785 | 1455 | input_section, rel->r_offset, |
3a27a730 L |
1456 | (!info->shared || info->no_undefined |
1457 | || ELF_ST_VISIBILITY (h->other))))) | |
b34976b6 | 1458 | return FALSE; |
252b5132 RH |
1459 | relocation = 0; |
1460 | } | |
1461 | } | |
1462 | ||
1463 | switch (r_type) | |
1464 | { | |
1465 | case R_68K_GOT8: | |
1466 | case R_68K_GOT16: | |
1467 | case R_68K_GOT32: | |
1468 | /* Relocation is to the address of the entry for this symbol | |
1469 | in the global offset table. */ | |
1470 | if (h != NULL | |
1471 | && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) | |
1472 | break; | |
1473 | /* Fall through. */ | |
1474 | case R_68K_GOT8O: | |
1475 | case R_68K_GOT16O: | |
1476 | case R_68K_GOT32O: | |
1477 | /* Relocation is the offset of the entry for this symbol in | |
1478 | the global offset table. */ | |
1479 | ||
1480 | { | |
1481 | bfd_vma off; | |
1482 | ||
1483 | if (sgot == NULL) | |
1484 | { | |
1485 | sgot = bfd_get_section_by_name (dynobj, ".got"); | |
1486 | BFD_ASSERT (sgot != NULL); | |
1487 | } | |
1488 | ||
1489 | if (h != NULL) | |
1490 | { | |
1491 | off = h->got.offset; | |
1492 | BFD_ASSERT (off != (bfd_vma) -1); | |
1493 | ||
1494 | if (!elf_hash_table (info)->dynamic_sections_created | |
1495 | || (info->shared | |
1496 | && (info->symbolic || h->dynindx == -1) | |
1497 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))) | |
1498 | { | |
1499 | /* This is actually a static link, or it is a | |
1500 | -Bsymbolic link and the symbol is defined | |
1501 | locally, or the symbol was forced to be local | |
1502 | because of a version file.. We must initialize | |
1503 | this entry in the global offset table. Since | |
1504 | the offset must always be a multiple of 4, we | |
1505 | use the least significant bit to record whether | |
1506 | we have initialized it already. | |
1507 | ||
1508 | When doing a dynamic link, we create a .rela.got | |
1509 | relocation entry to initialize the value. This | |
1510 | is done in the finish_dynamic_symbol routine. */ | |
1511 | if ((off & 1) != 0) | |
1512 | off &= ~1; | |
1513 | else | |
1514 | { | |
1515 | bfd_put_32 (output_bfd, relocation, | |
1516 | sgot->contents + off); | |
1517 | h->got.offset |= 1; | |
1518 | } | |
1519 | } | |
1520 | } | |
1521 | else | |
1522 | { | |
1523 | BFD_ASSERT (local_got_offsets != NULL | |
1524 | && local_got_offsets[r_symndx] != (bfd_vma) -1); | |
1525 | ||
1526 | off = local_got_offsets[r_symndx]; | |
1527 | ||
1528 | /* The offset must always be a multiple of 4. We use | |
1529 | the least significant bit to record whether we have | |
1530 | already generated the necessary reloc. */ | |
1531 | if ((off & 1) != 0) | |
1532 | off &= ~1; | |
1533 | else | |
1534 | { | |
1535 | bfd_put_32 (output_bfd, relocation, sgot->contents + off); | |
1536 | ||
1537 | if (info->shared) | |
1538 | { | |
947216bf | 1539 | asection *s; |
252b5132 | 1540 | Elf_Internal_Rela outrel; |
947216bf | 1541 | bfd_byte *loc; |
252b5132 | 1542 | |
947216bf AM |
1543 | s = bfd_get_section_by_name (dynobj, ".rela.got"); |
1544 | BFD_ASSERT (s != NULL); | |
252b5132 RH |
1545 | |
1546 | outrel.r_offset = (sgot->output_section->vma | |
1547 | + sgot->output_offset | |
1548 | + off); | |
1549 | outrel.r_info = ELF32_R_INFO (0, R_68K_RELATIVE); | |
1550 | outrel.r_addend = relocation; | |
947216bf AM |
1551 | loc = s->contents; |
1552 | loc += s->reloc_count++ * sizeof (Elf32_External_Rela); | |
1553 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); | |
252b5132 RH |
1554 | } |
1555 | ||
1556 | local_got_offsets[r_symndx] |= 1; | |
1557 | } | |
1558 | } | |
1559 | ||
1560 | relocation = sgot->output_offset + off; | |
1561 | if (r_type == R_68K_GOT8O | |
1562 | || r_type == R_68K_GOT16O | |
1563 | || r_type == R_68K_GOT32O) | |
1564 | { | |
1565 | /* This relocation does not use the addend. */ | |
1566 | rel->r_addend = 0; | |
1567 | } | |
1568 | else | |
1569 | relocation += sgot->output_section->vma; | |
1570 | } | |
1571 | break; | |
1572 | ||
1573 | case R_68K_PLT8: | |
1574 | case R_68K_PLT16: | |
1575 | case R_68K_PLT32: | |
1576 | /* Relocation is to the entry for this symbol in the | |
1577 | procedure linkage table. */ | |
1578 | ||
1579 | /* Resolve a PLTxx reloc against a local symbol directly, | |
1580 | without using the procedure linkage table. */ | |
1581 | if (h == NULL) | |
1582 | break; | |
1583 | ||
1584 | if (h->plt.offset == (bfd_vma) -1 | |
1585 | || !elf_hash_table (info)->dynamic_sections_created) | |
1586 | { | |
1587 | /* We didn't make a PLT entry for this symbol. This | |
1588 | happens when statically linking PIC code, or when | |
1589 | using -Bsymbolic. */ | |
1590 | break; | |
1591 | } | |
1592 | ||
1593 | if (splt == NULL) | |
1594 | { | |
1595 | splt = bfd_get_section_by_name (dynobj, ".plt"); | |
1596 | BFD_ASSERT (splt != NULL); | |
1597 | } | |
1598 | ||
1599 | relocation = (splt->output_section->vma | |
1600 | + splt->output_offset | |
1601 | + h->plt.offset); | |
1602 | break; | |
1603 | ||
1604 | case R_68K_PLT8O: | |
1605 | case R_68K_PLT16O: | |
1606 | case R_68K_PLT32O: | |
1607 | /* Relocation is the offset of the entry for this symbol in | |
1608 | the procedure linkage table. */ | |
1609 | BFD_ASSERT (h != NULL && h->plt.offset != (bfd_vma) -1); | |
1610 | ||
1611 | if (splt == NULL) | |
1612 | { | |
1613 | splt = bfd_get_section_by_name (dynobj, ".plt"); | |
1614 | BFD_ASSERT (splt != NULL); | |
1615 | } | |
1616 | ||
1617 | relocation = h->plt.offset; | |
1618 | ||
1619 | /* This relocation does not use the addend. */ | |
1620 | rel->r_addend = 0; | |
1621 | ||
1622 | break; | |
1623 | ||
1624 | case R_68K_PC8: | |
1625 | case R_68K_PC16: | |
1626 | case R_68K_PC32: | |
b6152c34 AS |
1627 | if (h == NULL |
1628 | || (info->shared | |
1629 | && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0)) | |
252b5132 RH |
1630 | break; |
1631 | /* Fall through. */ | |
1632 | case R_68K_8: | |
1633 | case R_68K_16: | |
1634 | case R_68K_32: | |
1635 | if (info->shared | |
ec338859 | 1636 | && r_symndx != 0 |
252b5132 RH |
1637 | && (input_section->flags & SEC_ALLOC) != 0 |
1638 | && ((r_type != R_68K_PC8 | |
1639 | && r_type != R_68K_PC16 | |
1640 | && r_type != R_68K_PC32) | |
1641 | || (!info->symbolic | |
1642 | || (h->elf_link_hash_flags | |
1643 | & ELF_LINK_HASH_DEF_REGULAR) == 0))) | |
1644 | { | |
1645 | Elf_Internal_Rela outrel; | |
947216bf | 1646 | bfd_byte *loc; |
b34976b6 | 1647 | bfd_boolean skip, relocate; |
252b5132 RH |
1648 | |
1649 | /* When generating a shared object, these relocations | |
1650 | are copied into the output file to be resolved at run | |
1651 | time. */ | |
1652 | ||
1653 | if (sreloc == NULL) | |
1654 | { | |
1655 | const char *name; | |
1656 | ||
1657 | name = (bfd_elf_string_from_elf_section | |
1658 | (input_bfd, | |
1659 | elf_elfheader (input_bfd)->e_shstrndx, | |
1660 | elf_section_data (input_section)->rel_hdr.sh_name)); | |
1661 | if (name == NULL) | |
b34976b6 | 1662 | return FALSE; |
252b5132 RH |
1663 | |
1664 | BFD_ASSERT (strncmp (name, ".rela", 5) == 0 | |
1665 | && strcmp (bfd_get_section_name (input_bfd, | |
1666 | input_section), | |
1667 | name + 5) == 0); | |
1668 | ||
1669 | sreloc = bfd_get_section_by_name (dynobj, name); | |
1670 | BFD_ASSERT (sreloc != NULL); | |
1671 | } | |
1672 | ||
b34976b6 AM |
1673 | skip = FALSE; |
1674 | relocate = FALSE; | |
252b5132 | 1675 | |
c629eae0 JJ |
1676 | outrel.r_offset = |
1677 | _bfd_elf_section_offset (output_bfd, info, input_section, | |
1678 | rel->r_offset); | |
1679 | if (outrel.r_offset == (bfd_vma) -1) | |
b34976b6 | 1680 | skip = TRUE; |
0bb2d96a | 1681 | else if (outrel.r_offset == (bfd_vma) -2) |
b34976b6 | 1682 | skip = TRUE, relocate = TRUE; |
252b5132 RH |
1683 | outrel.r_offset += (input_section->output_section->vma |
1684 | + input_section->output_offset); | |
1685 | ||
1686 | if (skip) | |
0bb2d96a | 1687 | memset (&outrel, 0, sizeof outrel); |
252b5132 RH |
1688 | /* h->dynindx may be -1 if the symbol was marked to |
1689 | become local. */ | |
1690 | else if (h != NULL | |
1691 | && ((! info->symbolic && h->dynindx != -1) | |
1692 | || (h->elf_link_hash_flags | |
1693 | & ELF_LINK_HASH_DEF_REGULAR) == 0)) | |
1694 | { | |
1695 | BFD_ASSERT (h->dynindx != -1); | |
252b5132 RH |
1696 | outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); |
1697 | outrel.r_addend = relocation + rel->r_addend; | |
1698 | } | |
1699 | else | |
1700 | { | |
1701 | if (r_type == R_68K_32) | |
1702 | { | |
b34976b6 | 1703 | relocate = TRUE; |
252b5132 RH |
1704 | outrel.r_info = ELF32_R_INFO (0, R_68K_RELATIVE); |
1705 | outrel.r_addend = relocation + rel->r_addend; | |
1706 | } | |
1707 | else | |
1708 | { | |
1709 | long indx; | |
1710 | ||
1711 | if (h == NULL) | |
1712 | sec = local_sections[r_symndx]; | |
1713 | else | |
1714 | { | |
1715 | BFD_ASSERT (h->root.type == bfd_link_hash_defined | |
1716 | || (h->root.type | |
1717 | == bfd_link_hash_defweak)); | |
1718 | sec = h->root.u.def.section; | |
1719 | } | |
1720 | if (sec != NULL && bfd_is_abs_section (sec)) | |
1721 | indx = 0; | |
1722 | else if (sec == NULL || sec->owner == NULL) | |
1723 | { | |
1724 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 1725 | return FALSE; |
252b5132 RH |
1726 | } |
1727 | else | |
1728 | { | |
1729 | asection *osec; | |
1730 | ||
1731 | osec = sec->output_section; | |
1732 | indx = elf_section_data (osec)->dynindx; | |
1733 | BFD_ASSERT (indx > 0); | |
1734 | } | |
1735 | ||
252b5132 RH |
1736 | outrel.r_info = ELF32_R_INFO (indx, r_type); |
1737 | outrel.r_addend = relocation + rel->r_addend; | |
1738 | } | |
1739 | } | |
1740 | ||
947216bf AM |
1741 | loc = sreloc->contents; |
1742 | loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela); | |
1743 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); | |
252b5132 RH |
1744 | |
1745 | /* This reloc will be computed at runtime, so there's no | |
1746 | need to do anything now, except for R_68K_32 | |
1747 | relocations that have been turned into | |
1748 | R_68K_RELATIVE. */ | |
1749 | if (!relocate) | |
1750 | continue; | |
1751 | } | |
1752 | ||
1753 | break; | |
1754 | ||
1755 | case R_68K_GNU_VTINHERIT: | |
1756 | case R_68K_GNU_VTENTRY: | |
1757 | /* These are no-ops in the end. */ | |
1758 | continue; | |
1759 | ||
1760 | default: | |
1761 | break; | |
1762 | } | |
1763 | ||
1764 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, | |
1765 | contents, rel->r_offset, | |
1766 | relocation, rel->r_addend); | |
1767 | ||
1768 | if (r != bfd_reloc_ok) | |
1769 | { | |
1770 | switch (r) | |
1771 | { | |
1772 | default: | |
1773 | case bfd_reloc_outofrange: | |
1774 | abort (); | |
1775 | case bfd_reloc_overflow: | |
1776 | { | |
1777 | const char *name; | |
1778 | ||
1779 | if (h != NULL) | |
1780 | name = h->root.root.string; | |
1781 | else | |
1782 | { | |
1783 | name = bfd_elf_string_from_elf_section (input_bfd, | |
1784 | symtab_hdr->sh_link, | |
1785 | sym->st_name); | |
1786 | if (name == NULL) | |
b34976b6 | 1787 | return FALSE; |
252b5132 RH |
1788 | if (*name == '\0') |
1789 | name = bfd_section_name (input_bfd, sec); | |
1790 | } | |
1791 | if (!(info->callbacks->reloc_overflow | |
1792 | (info, name, howto->name, (bfd_vma) 0, | |
1793 | input_bfd, input_section, rel->r_offset))) | |
b34976b6 | 1794 | return FALSE; |
252b5132 RH |
1795 | } |
1796 | break; | |
1797 | } | |
1798 | } | |
1799 | } | |
1800 | ||
b34976b6 | 1801 | return TRUE; |
252b5132 RH |
1802 | } |
1803 | ||
1804 | /* Finish up dynamic symbol handling. We set the contents of various | |
1805 | dynamic sections here. */ | |
1806 | ||
b34976b6 | 1807 | static bfd_boolean |
252b5132 RH |
1808 | elf_m68k_finish_dynamic_symbol (output_bfd, info, h, sym) |
1809 | bfd *output_bfd; | |
1810 | struct bfd_link_info *info; | |
1811 | struct elf_link_hash_entry *h; | |
1812 | Elf_Internal_Sym *sym; | |
1813 | { | |
1814 | bfd *dynobj; | |
9e1281c7 | 1815 | int plt_off1, plt_off2, plt_off3; |
252b5132 RH |
1816 | |
1817 | dynobj = elf_hash_table (info)->dynobj; | |
1818 | ||
1819 | if (h->plt.offset != (bfd_vma) -1) | |
1820 | { | |
1821 | asection *splt; | |
1822 | asection *sgot; | |
1823 | asection *srela; | |
1824 | bfd_vma plt_index; | |
1825 | bfd_vma got_offset; | |
1826 | Elf_Internal_Rela rela; | |
947216bf | 1827 | bfd_byte *loc; |
252b5132 RH |
1828 | |
1829 | /* This symbol has an entry in the procedure linkage table. Set | |
1830 | it up. */ | |
1831 | ||
1832 | BFD_ASSERT (h->dynindx != -1); | |
1833 | ||
1834 | splt = bfd_get_section_by_name (dynobj, ".plt"); | |
1835 | sgot = bfd_get_section_by_name (dynobj, ".got.plt"); | |
1836 | srela = bfd_get_section_by_name (dynobj, ".rela.plt"); | |
1837 | BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL); | |
1838 | ||
1839 | /* Get the index in the procedure linkage table which | |
1840 | corresponds to this symbol. This is the index of this symbol | |
1841 | in all the symbols for which we are making plt entries. The | |
1842 | first entry in the procedure linkage table is reserved. */ | |
9e1281c7 CM |
1843 | if ( CPU32_FLAG (output_bfd)) |
1844 | plt_index = h->plt.offset / PLT_CPU32_ENTRY_SIZE - 1; | |
1845 | else | |
1846 | plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1; | |
252b5132 RH |
1847 | |
1848 | /* Get the offset into the .got table of the entry that | |
1849 | corresponds to this function. Each .got entry is 4 bytes. | |
1850 | The first three are reserved. */ | |
1851 | got_offset = (plt_index + 3) * 4; | |
1852 | ||
9e1281c7 CM |
1853 | if ( CPU32_FLAG (output_bfd)) |
1854 | { | |
1855 | /* Fill in the entry in the procedure linkage table. */ | |
1856 | memcpy (splt->contents + h->plt.offset, elf_cpu32_plt_entry, | |
1857 | PLT_CPU32_ENTRY_SIZE); | |
1858 | plt_off1 = 4; | |
1859 | plt_off2 = 12; | |
1860 | plt_off3 = 18; | |
1861 | } | |
1862 | else | |
1863 | { | |
1864 | /* Fill in the entry in the procedure linkage table. */ | |
1865 | memcpy (splt->contents + h->plt.offset, elf_m68k_plt_entry, | |
1866 | PLT_ENTRY_SIZE); | |
1867 | plt_off1 = 4; | |
1868 | plt_off2 = 10; | |
1869 | plt_off3 = 16; | |
1870 | } | |
1871 | ||
252b5132 RH |
1872 | /* The offset is relative to the first extension word. */ |
1873 | bfd_put_32 (output_bfd, | |
1874 | (sgot->output_section->vma | |
1875 | + sgot->output_offset | |
1876 | + got_offset | |
1877 | - (splt->output_section->vma | |
1878 | + h->plt.offset + 2)), | |
9e1281c7 | 1879 | splt->contents + h->plt.offset + plt_off1); |
252b5132 RH |
1880 | |
1881 | bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela), | |
9e1281c7 CM |
1882 | splt->contents + h->plt.offset + plt_off2); |
1883 | bfd_put_32 (output_bfd, - (h->plt.offset + plt_off3), | |
1884 | splt->contents + h->plt.offset + plt_off3); | |
252b5132 RH |
1885 | |
1886 | /* Fill in the entry in the global offset table. */ | |
1887 | bfd_put_32 (output_bfd, | |
1888 | (splt->output_section->vma | |
1889 | + splt->output_offset | |
1890 | + h->plt.offset | |
1891 | + 8), | |
1892 | sgot->contents + got_offset); | |
1893 | ||
1894 | /* Fill in the entry in the .rela.plt section. */ | |
1895 | rela.r_offset = (sgot->output_section->vma | |
1896 | + sgot->output_offset | |
1897 | + got_offset); | |
1898 | rela.r_info = ELF32_R_INFO (h->dynindx, R_68K_JMP_SLOT); | |
1899 | rela.r_addend = 0; | |
947216bf AM |
1900 | loc = srela->contents + plt_index * sizeof (Elf32_External_Rela); |
1901 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); | |
252b5132 RH |
1902 | |
1903 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
1904 | { | |
1905 | /* Mark the symbol as undefined, rather than as defined in | |
1906 | the .plt section. Leave the value alone. */ | |
1907 | sym->st_shndx = SHN_UNDEF; | |
1908 | } | |
1909 | } | |
1910 | ||
1911 | if (h->got.offset != (bfd_vma) -1) | |
1912 | { | |
1913 | asection *sgot; | |
1914 | asection *srela; | |
1915 | Elf_Internal_Rela rela; | |
947216bf | 1916 | bfd_byte *loc; |
252b5132 RH |
1917 | |
1918 | /* This symbol has an entry in the global offset table. Set it | |
1919 | up. */ | |
1920 | ||
1921 | sgot = bfd_get_section_by_name (dynobj, ".got"); | |
1922 | srela = bfd_get_section_by_name (dynobj, ".rela.got"); | |
1923 | BFD_ASSERT (sgot != NULL && srela != NULL); | |
1924 | ||
1925 | rela.r_offset = (sgot->output_section->vma | |
1926 | + sgot->output_offset | |
dc810e39 | 1927 | + (h->got.offset &~ (bfd_vma) 1)); |
252b5132 RH |
1928 | |
1929 | /* If this is a -Bsymbolic link, and the symbol is defined | |
1930 | locally, we just want to emit a RELATIVE reloc. Likewise if | |
1931 | the symbol was forced to be local because of a version file. | |
1932 | The entry in the global offset table will already have been | |
1933 | initialized in the relocate_section function. */ | |
1934 | if (info->shared | |
1935 | && (info->symbolic || h->dynindx == -1) | |
1936 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)) | |
1937 | { | |
1938 | rela.r_info = ELF32_R_INFO (0, R_68K_RELATIVE); | |
1939 | rela.r_addend = bfd_get_signed_32 (output_bfd, | |
1940 | (sgot->contents | |
dc810e39 | 1941 | + (h->got.offset &~ (bfd_vma) 1))); |
252b5132 RH |
1942 | } |
1943 | else | |
1944 | { | |
1945 | bfd_put_32 (output_bfd, (bfd_vma) 0, | |
dc810e39 | 1946 | sgot->contents + (h->got.offset &~ (bfd_vma) 1)); |
252b5132 RH |
1947 | rela.r_info = ELF32_R_INFO (h->dynindx, R_68K_GLOB_DAT); |
1948 | rela.r_addend = 0; | |
1949 | } | |
1950 | ||
947216bf AM |
1951 | loc = srela->contents; |
1952 | loc += srela->reloc_count++ * sizeof (Elf32_External_Rela); | |
1953 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); | |
252b5132 RH |
1954 | } |
1955 | ||
1956 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0) | |
1957 | { | |
1958 | asection *s; | |
1959 | Elf_Internal_Rela rela; | |
947216bf | 1960 | bfd_byte *loc; |
252b5132 RH |
1961 | |
1962 | /* This symbol needs a copy reloc. Set it up. */ | |
1963 | ||
1964 | BFD_ASSERT (h->dynindx != -1 | |
1965 | && (h->root.type == bfd_link_hash_defined | |
1966 | || h->root.type == bfd_link_hash_defweak)); | |
1967 | ||
1968 | s = bfd_get_section_by_name (h->root.u.def.section->owner, | |
1969 | ".rela.bss"); | |
1970 | BFD_ASSERT (s != NULL); | |
1971 | ||
1972 | rela.r_offset = (h->root.u.def.value | |
1973 | + h->root.u.def.section->output_section->vma | |
1974 | + h->root.u.def.section->output_offset); | |
1975 | rela.r_info = ELF32_R_INFO (h->dynindx, R_68K_COPY); | |
1976 | rela.r_addend = 0; | |
947216bf AM |
1977 | loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela); |
1978 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); | |
252b5132 RH |
1979 | } |
1980 | ||
1981 | /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */ | |
1982 | if (strcmp (h->root.root.string, "_DYNAMIC") == 0 | |
1983 | || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) | |
1984 | sym->st_shndx = SHN_ABS; | |
1985 | ||
b34976b6 | 1986 | return TRUE; |
252b5132 RH |
1987 | } |
1988 | ||
1989 | /* Finish up the dynamic sections. */ | |
1990 | ||
b34976b6 | 1991 | static bfd_boolean |
252b5132 RH |
1992 | elf_m68k_finish_dynamic_sections (output_bfd, info) |
1993 | bfd *output_bfd; | |
1994 | struct bfd_link_info *info; | |
1995 | { | |
1996 | bfd *dynobj; | |
1997 | asection *sgot; | |
1998 | asection *sdyn; | |
1999 | ||
2000 | dynobj = elf_hash_table (info)->dynobj; | |
2001 | ||
2002 | sgot = bfd_get_section_by_name (dynobj, ".got.plt"); | |
2003 | BFD_ASSERT (sgot != NULL); | |
2004 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); | |
2005 | ||
2006 | if (elf_hash_table (info)->dynamic_sections_created) | |
2007 | { | |
2008 | asection *splt; | |
2009 | Elf32_External_Dyn *dyncon, *dynconend; | |
2010 | ||
2011 | splt = bfd_get_section_by_name (dynobj, ".plt"); | |
2012 | BFD_ASSERT (splt != NULL && sdyn != NULL); | |
2013 | ||
2014 | dyncon = (Elf32_External_Dyn *) sdyn->contents; | |
2015 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size); | |
2016 | for (; dyncon < dynconend; dyncon++) | |
2017 | { | |
2018 | Elf_Internal_Dyn dyn; | |
2019 | const char *name; | |
2020 | asection *s; | |
2021 | ||
2022 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); | |
2023 | ||
2024 | switch (dyn.d_tag) | |
2025 | { | |
2026 | default: | |
2027 | break; | |
2028 | ||
2029 | case DT_PLTGOT: | |
2030 | name = ".got"; | |
2031 | goto get_vma; | |
2032 | case DT_JMPREL: | |
2033 | name = ".rela.plt"; | |
2034 | get_vma: | |
2035 | s = bfd_get_section_by_name (output_bfd, name); | |
2036 | BFD_ASSERT (s != NULL); | |
2037 | dyn.d_un.d_ptr = s->vma; | |
2038 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); | |
2039 | break; | |
2040 | ||
2041 | case DT_PLTRELSZ: | |
2042 | s = bfd_get_section_by_name (output_bfd, ".rela.plt"); | |
2043 | BFD_ASSERT (s != NULL); | |
2044 | if (s->_cooked_size != 0) | |
2045 | dyn.d_un.d_val = s->_cooked_size; | |
2046 | else | |
2047 | dyn.d_un.d_val = s->_raw_size; | |
2048 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); | |
2049 | break; | |
2050 | ||
2051 | case DT_RELASZ: | |
2052 | /* The procedure linkage table relocs (DT_JMPREL) should | |
2053 | not be included in the overall relocs (DT_RELA). | |
2054 | Therefore, we override the DT_RELASZ entry here to | |
2055 | make it not include the JMPREL relocs. Since the | |
2056 | linker script arranges for .rela.plt to follow all | |
2057 | other relocation sections, we don't have to worry | |
2058 | about changing the DT_RELA entry. */ | |
2059 | s = bfd_get_section_by_name (output_bfd, ".rela.plt"); | |
2060 | if (s != NULL) | |
2061 | { | |
2062 | if (s->_cooked_size != 0) | |
2063 | dyn.d_un.d_val -= s->_cooked_size; | |
2064 | else | |
2065 | dyn.d_un.d_val -= s->_raw_size; | |
2066 | } | |
2067 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); | |
2068 | break; | |
2069 | } | |
2070 | } | |
2071 | ||
2072 | /* Fill in the first entry in the procedure linkage table. */ | |
2073 | if (splt->_raw_size > 0) | |
2074 | { | |
9e1281c7 CM |
2075 | if (!CPU32_FLAG (output_bfd)) |
2076 | { | |
2077 | memcpy (splt->contents, elf_m68k_plt0_entry, PLT_ENTRY_SIZE); | |
2078 | bfd_put_32 (output_bfd, | |
2079 | (sgot->output_section->vma | |
2080 | + sgot->output_offset + 4 | |
2081 | - (splt->output_section->vma + 2)), | |
2082 | splt->contents + 4); | |
2083 | bfd_put_32 (output_bfd, | |
2084 | (sgot->output_section->vma | |
2085 | + sgot->output_offset + 8 | |
2086 | - (splt->output_section->vma + 10)), | |
2087 | splt->contents + 12); | |
c3668558 | 2088 | elf_section_data (splt->output_section)->this_hdr.sh_entsize |
9e1281c7 CM |
2089 | = PLT_ENTRY_SIZE; |
2090 | } | |
2091 | else /* cpu32 */ | |
2092 | { | |
2093 | memcpy (splt->contents, elf_cpu32_plt0_entry, PLT_CPU32_ENTRY_SIZE); | |
2094 | bfd_put_32 (output_bfd, | |
2095 | (sgot->output_section->vma | |
2096 | + sgot->output_offset + 4 | |
2097 | - (splt->output_section->vma + 2)), | |
2098 | splt->contents + 4); | |
2099 | bfd_put_32 (output_bfd, | |
2100 | (sgot->output_section->vma | |
2101 | + sgot->output_offset + 8 | |
2102 | - (splt->output_section->vma + 10)), | |
6091b433 | 2103 | splt->contents + 12); |
c3668558 | 2104 | elf_section_data (splt->output_section)->this_hdr.sh_entsize |
9e1281c7 CM |
2105 | = PLT_CPU32_ENTRY_SIZE; |
2106 | } | |
252b5132 | 2107 | } |
252b5132 RH |
2108 | } |
2109 | ||
2110 | /* Fill in the first three entries in the global offset table. */ | |
2111 | if (sgot->_raw_size > 0) | |
2112 | { | |
2113 | if (sdyn == NULL) | |
2114 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents); | |
2115 | else | |
2116 | bfd_put_32 (output_bfd, | |
2117 | sdyn->output_section->vma + sdyn->output_offset, | |
2118 | sgot->contents); | |
2119 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4); | |
2120 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8); | |
2121 | } | |
2122 | ||
2123 | elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4; | |
2124 | ||
b34976b6 | 2125 | return TRUE; |
252b5132 RH |
2126 | } |
2127 | ||
0752970e NC |
2128 | /* Given a .data section and a .emreloc in-memory section, store |
2129 | relocation information into the .emreloc section which can be | |
2130 | used at runtime to relocate the section. This is called by the | |
2131 | linker when the --embedded-relocs switch is used. This is called | |
2132 | after the add_symbols entry point has been called for all the | |
2133 | objects, and before the final_link entry point is called. */ | |
2134 | ||
b34976b6 | 2135 | bfd_boolean |
0752970e NC |
2136 | bfd_m68k_elf32_create_embedded_relocs (abfd, info, datasec, relsec, errmsg) |
2137 | bfd *abfd; | |
2138 | struct bfd_link_info *info; | |
2139 | asection *datasec; | |
2140 | asection *relsec; | |
2141 | char **errmsg; | |
2142 | { | |
2143 | Elf_Internal_Shdr *symtab_hdr; | |
6cdc0ccc AM |
2144 | Elf_Internal_Sym *isymbuf = NULL; |
2145 | Elf_Internal_Rela *internal_relocs = NULL; | |
0752970e NC |
2146 | Elf_Internal_Rela *irel, *irelend; |
2147 | bfd_byte *p; | |
dc810e39 | 2148 | bfd_size_type amt; |
0752970e NC |
2149 | |
2150 | BFD_ASSERT (! info->relocateable); | |
2151 | ||
2152 | *errmsg = NULL; | |
2153 | ||
2154 | if (datasec->reloc_count == 0) | |
b34976b6 | 2155 | return TRUE; |
0752970e NC |
2156 | |
2157 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
9ad5cbcf | 2158 | |
0752970e NC |
2159 | /* Get a copy of the native relocations. */ |
2160 | internal_relocs = (_bfd_elf32_link_read_relocs | |
2161 | (abfd, datasec, (PTR) NULL, (Elf_Internal_Rela *) NULL, | |
2162 | info->keep_memory)); | |
2163 | if (internal_relocs == NULL) | |
2164 | goto error_return; | |
0752970e | 2165 | |
dc810e39 AM |
2166 | amt = (bfd_size_type) datasec->reloc_count * 12; |
2167 | relsec->contents = (bfd_byte *) bfd_alloc (abfd, amt); | |
0752970e NC |
2168 | if (relsec->contents == NULL) |
2169 | goto error_return; | |
2170 | ||
2171 | p = relsec->contents; | |
2172 | ||
2173 | irelend = internal_relocs + datasec->reloc_count; | |
2174 | for (irel = internal_relocs; irel < irelend; irel++, p += 12) | |
2175 | { | |
2176 | asection *targetsec; | |
2177 | ||
2178 | /* We are going to write a four byte longword into the runtime | |
2179 | reloc section. The longword will be the address in the data | |
2180 | section which must be relocated. It is followed by the name | |
2181 | of the target section NUL-padded or truncated to 8 | |
2182 | characters. */ | |
2183 | ||
2184 | /* We can only relocate absolute longword relocs at run time. */ | |
2185 | if (ELF32_R_TYPE (irel->r_info) != (int) R_68K_32) | |
2186 | { | |
2187 | *errmsg = _("unsupported reloc type"); | |
2188 | bfd_set_error (bfd_error_bad_value); | |
2189 | goto error_return; | |
2190 | } | |
2191 | ||
2192 | /* Get the target section referred to by the reloc. */ | |
2193 | if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info) | |
2194 | { | |
0752970e | 2195 | /* A local symbol. */ |
6cdc0ccc AM |
2196 | Elf_Internal_Sym *isym; |
2197 | ||
2198 | /* Read this BFD's local symbols if we haven't done so already. */ | |
2199 | if (isymbuf == NULL) | |
2200 | { | |
2201 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; | |
2202 | if (isymbuf == NULL) | |
2203 | isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, | |
2204 | symtab_hdr->sh_info, 0, | |
2205 | NULL, NULL, NULL); | |
2206 | if (isymbuf == NULL) | |
2207 | goto error_return; | |
2208 | } | |
0752970e | 2209 | |
6cdc0ccc AM |
2210 | isym = isymbuf + ELF32_R_SYM (irel->r_info); |
2211 | targetsec = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
0752970e NC |
2212 | } |
2213 | else | |
2214 | { | |
2215 | unsigned long indx; | |
2216 | struct elf_link_hash_entry *h; | |
2217 | ||
2218 | /* An external symbol. */ | |
2219 | indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info; | |
2220 | h = elf_sym_hashes (abfd)[indx]; | |
2221 | BFD_ASSERT (h != NULL); | |
2222 | if (h->root.type == bfd_link_hash_defined | |
2223 | || h->root.type == bfd_link_hash_defweak) | |
2224 | targetsec = h->root.u.def.section; | |
2225 | else | |
2226 | targetsec = NULL; | |
2227 | } | |
2228 | ||
2229 | bfd_put_32 (abfd, irel->r_offset + datasec->output_offset, p); | |
2230 | memset (p + 4, 0, 8); | |
2231 | if (targetsec != NULL) | |
2232 | strncpy (p + 4, targetsec->output_section->name, 8); | |
2233 | } | |
c3668558 | 2234 | |
6cdc0ccc AM |
2235 | if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf) |
2236 | free (isymbuf); | |
2237 | if (internal_relocs != NULL | |
2238 | && elf_section_data (datasec)->relocs != internal_relocs) | |
2239 | free (internal_relocs); | |
b34976b6 | 2240 | return TRUE; |
0752970e NC |
2241 | |
2242 | error_return: | |
6cdc0ccc AM |
2243 | if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf) |
2244 | free (isymbuf); | |
2245 | if (internal_relocs != NULL | |
2246 | && elf_section_data (datasec)->relocs != internal_relocs) | |
2247 | free (internal_relocs); | |
b34976b6 | 2248 | return FALSE; |
0752970e NC |
2249 | } |
2250 | ||
aa91b392 | 2251 | static enum elf_reloc_type_class |
f51e552e AM |
2252 | elf32_m68k_reloc_type_class (rela) |
2253 | const Elf_Internal_Rela *rela; | |
aa91b392 | 2254 | { |
f51e552e | 2255 | switch ((int) ELF32_R_TYPE (rela->r_info)) |
aa91b392 AS |
2256 | { |
2257 | case R_68K_RELATIVE: | |
2258 | return reloc_class_relative; | |
2259 | case R_68K_JMP_SLOT: | |
2260 | return reloc_class_plt; | |
2261 | case R_68K_COPY: | |
2262 | return reloc_class_copy; | |
2263 | default: | |
2264 | return reloc_class_normal; | |
2265 | } | |
2266 | } | |
2267 | ||
252b5132 RH |
2268 | #define TARGET_BIG_SYM bfd_elf32_m68k_vec |
2269 | #define TARGET_BIG_NAME "elf32-m68k" | |
2270 | #define ELF_MACHINE_CODE EM_68K | |
2271 | #define ELF_MAXPAGESIZE 0x2000 | |
2272 | #define elf_backend_create_dynamic_sections \ | |
2273 | _bfd_elf_create_dynamic_sections | |
2274 | #define bfd_elf32_bfd_link_hash_table_create \ | |
2275 | elf_m68k_link_hash_table_create | |
2276 | #define bfd_elf32_bfd_final_link _bfd_elf32_gc_common_final_link | |
2277 | ||
2278 | #define elf_backend_check_relocs elf_m68k_check_relocs | |
2279 | #define elf_backend_adjust_dynamic_symbol \ | |
2280 | elf_m68k_adjust_dynamic_symbol | |
2281 | #define elf_backend_size_dynamic_sections \ | |
2282 | elf_m68k_size_dynamic_sections | |
2283 | #define elf_backend_relocate_section elf_m68k_relocate_section | |
2284 | #define elf_backend_finish_dynamic_symbol \ | |
2285 | elf_m68k_finish_dynamic_symbol | |
2286 | #define elf_backend_finish_dynamic_sections \ | |
2287 | elf_m68k_finish_dynamic_sections | |
2288 | #define elf_backend_gc_mark_hook elf_m68k_gc_mark_hook | |
2289 | #define elf_backend_gc_sweep_hook elf_m68k_gc_sweep_hook | |
9e1281c7 CM |
2290 | #define bfd_elf32_bfd_merge_private_bfd_data \ |
2291 | elf32_m68k_merge_private_bfd_data | |
2292 | #define bfd_elf32_bfd_set_private_flags \ | |
2293 | elf32_m68k_set_private_flags | |
2294 | #define bfd_elf32_bfd_print_private_bfd_data \ | |
2295 | elf32_m68k_print_private_bfd_data | |
aa91b392 | 2296 | #define elf_backend_reloc_type_class elf32_m68k_reloc_type_class |
9e1281c7 | 2297 | |
252b5132 | 2298 | #define elf_backend_can_gc_sections 1 |
51b64d56 | 2299 | #define elf_backend_can_refcount 1 |
252b5132 RH |
2300 | #define elf_backend_want_got_plt 1 |
2301 | #define elf_backend_plt_readonly 1 | |
2302 | #define elf_backend_want_plt_sym 0 | |
2303 | #define elf_backend_got_header_size 12 | |
b491616a | 2304 | #define elf_backend_rela_normal 1 |
252b5132 RH |
2305 | |
2306 | #include "elf32-target.h" |