Commit | Line | Data |
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252b5132 | 1 | /* Motorola 68k series support for 32-bit ELF |
7898deda NC |
2 | Copyright 1993, 1995, 1996, 1997, 1998, 1999, 2000, 2001 |
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 | |
31 | PARAMS ((bfd *, arelent *, Elf32_Internal_Rela *)); | |
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 *)); | |
36 | static boolean elf_m68k_check_relocs | |
37 | PARAMS ((bfd *, struct bfd_link_info *, asection *, | |
38 | const Elf_Internal_Rela *)); | |
39 | static asection *elf_m68k_gc_mark_hook | |
40 | PARAMS ((bfd *, struct bfd_link_info *, Elf_Internal_Rela *, | |
41 | struct elf_link_hash_entry *, Elf_Internal_Sym *)); | |
42 | static boolean elf_m68k_gc_sweep_hook | |
43 | PARAMS ((bfd *, struct bfd_link_info *, asection *, | |
44 | const Elf_Internal_Rela *)); | |
45 | static boolean elf_m68k_adjust_dynamic_symbol | |
46 | PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *)); | |
252b5132 RH |
47 | static boolean elf_m68k_size_dynamic_sections |
48 | PARAMS ((bfd *, struct bfd_link_info *)); | |
49 | static boolean elf_m68k_relocate_section | |
50 | PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, | |
51 | Elf_Internal_Rela *, Elf_Internal_Sym *, asection **)); | |
52 | static boolean elf_m68k_finish_dynamic_symbol | |
53 | PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *, | |
54 | Elf_Internal_Sym *)); | |
55 | static boolean elf_m68k_finish_dynamic_sections | |
56 | PARAMS ((bfd *, struct bfd_link_info *)); | |
57 | ||
9e1281c7 CM |
58 | static boolean elf32_m68k_set_private_flags |
59 | PARAMS ((bfd *, flagword)); | |
60 | static boolean elf32_m68k_copy_private_bfd_data | |
61 | PARAMS ((bfd *, bfd *)); | |
62 | static boolean elf32_m68k_merge_private_bfd_data | |
63 | PARAMS ((bfd *, bfd *)); | |
64 | static boolean elf32_m68k_print_private_bfd_data | |
65 | PARAMS ((bfd *, PTR)); | |
aa91b392 AS |
66 | static enum elf_reloc_type_class elf32_m68k_reloc_type_class |
67 | PARAMS ((int)); | |
9e1281c7 | 68 | |
252b5132 RH |
69 | static reloc_howto_type howto_table[] = { |
70 | HOWTO(R_68K_NONE, 0, 0, 0, false,0, complain_overflow_dont, bfd_elf_generic_reloc, "R_68K_NONE", false, 0, 0x00000000,false), | |
71 | HOWTO(R_68K_32, 0, 2,32, false,0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_32", false, 0, 0xffffffff,false), | |
72 | HOWTO(R_68K_16, 0, 1,16, false,0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_16", false, 0, 0x0000ffff,false), | |
73 | HOWTO(R_68K_8, 0, 0, 8, false,0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_8", false, 0, 0x000000ff,false), | |
74 | HOWTO(R_68K_PC32, 0, 2,32, true, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_PC32", false, 0, 0xffffffff,true), | |
75 | HOWTO(R_68K_PC16, 0, 1,16, true, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_PC16", false, 0, 0x0000ffff,true), | |
76 | HOWTO(R_68K_PC8, 0, 0, 8, true, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_PC8", false, 0, 0x000000ff,true), | |
77 | HOWTO(R_68K_GOT32, 0, 2,32, true, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_GOT32", false, 0, 0xffffffff,true), | |
78 | HOWTO(R_68K_GOT16, 0, 1,16, true, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_GOT16", false, 0, 0x0000ffff,true), | |
79 | HOWTO(R_68K_GOT8, 0, 0, 8, true, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_GOT8", false, 0, 0x000000ff,true), | |
80 | HOWTO(R_68K_GOT32O, 0, 2,32, false,0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_GOT32O", false, 0, 0xffffffff,false), | |
81 | HOWTO(R_68K_GOT16O, 0, 1,16, false,0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_GOT16O", false, 0, 0x0000ffff,false), | |
82 | HOWTO(R_68K_GOT8O, 0, 0, 8, false,0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_GOT8O", false, 0, 0x000000ff,false), | |
83 | HOWTO(R_68K_PLT32, 0, 2,32, true, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_PLT32", false, 0, 0xffffffff,true), | |
84 | HOWTO(R_68K_PLT16, 0, 1,16, true, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_PLT16", false, 0, 0x0000ffff,true), | |
85 | HOWTO(R_68K_PLT8, 0, 0, 8, true, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_PLT8", false, 0, 0x000000ff,true), | |
86 | HOWTO(R_68K_PLT32O, 0, 2,32, false,0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_PLT32O", false, 0, 0xffffffff,false), | |
87 | HOWTO(R_68K_PLT16O, 0, 1,16, false,0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_PLT16O", false, 0, 0x0000ffff,false), | |
88 | HOWTO(R_68K_PLT8O, 0, 0, 8, false,0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_PLT8O", false, 0, 0x000000ff,false), | |
89 | HOWTO(R_68K_COPY, 0, 0, 0, false,0, complain_overflow_dont, bfd_elf_generic_reloc, "R_68K_COPY", false, 0, 0xffffffff,false), | |
90 | 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), | |
91 | 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), | |
92 | HOWTO(R_68K_RELATIVE, 0, 2,32, false,0, complain_overflow_dont, bfd_elf_generic_reloc, "R_68K_RELATIVE", false, 0, 0xffffffff,false), | |
93 | /* GNU extension to record C++ vtable hierarchy */ | |
94 | HOWTO (R_68K_GNU_VTINHERIT, /* type */ | |
95 | 0, /* rightshift */ | |
96 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
97 | 0, /* bitsize */ | |
98 | false, /* pc_relative */ | |
99 | 0, /* bitpos */ | |
100 | complain_overflow_dont, /* complain_on_overflow */ | |
101 | NULL, /* special_function */ | |
102 | "R_68K_GNU_VTINHERIT", /* name */ | |
103 | false, /* partial_inplace */ | |
104 | 0, /* src_mask */ | |
105 | 0, /* dst_mask */ | |
106 | false), | |
107 | /* GNU extension to record C++ vtable member usage */ | |
108 | HOWTO (R_68K_GNU_VTENTRY, /* type */ | |
109 | 0, /* rightshift */ | |
110 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
111 | 0, /* bitsize */ | |
112 | false, /* pc_relative */ | |
113 | 0, /* bitpos */ | |
114 | complain_overflow_dont, /* complain_on_overflow */ | |
115 | _bfd_elf_rel_vtable_reloc_fn, /* special_function */ | |
116 | "R_68K_GNU_VTENTRY", /* name */ | |
117 | false, /* partial_inplace */ | |
118 | 0, /* src_mask */ | |
119 | 0, /* dst_mask */ | |
120 | false), | |
121 | }; | |
122 | ||
123 | static void | |
124 | rtype_to_howto (abfd, cache_ptr, dst) | |
121089cb | 125 | bfd *abfd ATTRIBUTE_UNUSED; |
252b5132 RH |
126 | arelent *cache_ptr; |
127 | Elf_Internal_Rela *dst; | |
128 | { | |
129 | BFD_ASSERT (ELF32_R_TYPE(dst->r_info) < (unsigned int) R_68K_max); | |
130 | cache_ptr->howto = &howto_table[ELF32_R_TYPE(dst->r_info)]; | |
131 | } | |
132 | ||
133 | #define elf_info_to_howto rtype_to_howto | |
134 | ||
135 | static const struct | |
136 | { | |
137 | bfd_reloc_code_real_type bfd_val; | |
138 | int elf_val; | |
139 | } reloc_map[] = { | |
140 | { BFD_RELOC_NONE, R_68K_NONE }, | |
141 | { BFD_RELOC_32, R_68K_32 }, | |
142 | { BFD_RELOC_16, R_68K_16 }, | |
143 | { BFD_RELOC_8, R_68K_8 }, | |
144 | { BFD_RELOC_32_PCREL, R_68K_PC32 }, | |
145 | { BFD_RELOC_16_PCREL, R_68K_PC16 }, | |
146 | { BFD_RELOC_8_PCREL, R_68K_PC8 }, | |
147 | { BFD_RELOC_32_GOT_PCREL, R_68K_GOT32 }, | |
148 | { BFD_RELOC_16_GOT_PCREL, R_68K_GOT16 }, | |
149 | { BFD_RELOC_8_GOT_PCREL, R_68K_GOT8 }, | |
150 | { BFD_RELOC_32_GOTOFF, R_68K_GOT32O }, | |
151 | { BFD_RELOC_16_GOTOFF, R_68K_GOT16O }, | |
152 | { BFD_RELOC_8_GOTOFF, R_68K_GOT8O }, | |
153 | { BFD_RELOC_32_PLT_PCREL, R_68K_PLT32 }, | |
154 | { BFD_RELOC_16_PLT_PCREL, R_68K_PLT16 }, | |
155 | { BFD_RELOC_8_PLT_PCREL, R_68K_PLT8 }, | |
156 | { BFD_RELOC_32_PLTOFF, R_68K_PLT32O }, | |
157 | { BFD_RELOC_16_PLTOFF, R_68K_PLT16O }, | |
158 | { BFD_RELOC_8_PLTOFF, R_68K_PLT8O }, | |
159 | { BFD_RELOC_NONE, R_68K_COPY }, | |
160 | { BFD_RELOC_68K_GLOB_DAT, R_68K_GLOB_DAT }, | |
161 | { BFD_RELOC_68K_JMP_SLOT, R_68K_JMP_SLOT }, | |
162 | { BFD_RELOC_68K_RELATIVE, R_68K_RELATIVE }, | |
163 | { BFD_RELOC_CTOR, R_68K_32 }, | |
164 | { BFD_RELOC_VTABLE_INHERIT, R_68K_GNU_VTINHERIT }, | |
165 | { BFD_RELOC_VTABLE_ENTRY, R_68K_GNU_VTENTRY }, | |
166 | }; | |
167 | ||
168 | static reloc_howto_type * | |
169 | reloc_type_lookup (abfd, code) | |
121089cb | 170 | bfd *abfd ATTRIBUTE_UNUSED; |
252b5132 RH |
171 | bfd_reloc_code_real_type code; |
172 | { | |
173 | unsigned int i; | |
174 | for (i = 0; i < sizeof (reloc_map) / sizeof (reloc_map[0]); i++) | |
175 | { | |
176 | if (reloc_map[i].bfd_val == code) | |
177 | return &howto_table[reloc_map[i].elf_val]; | |
178 | } | |
179 | return 0; | |
180 | } | |
181 | ||
182 | #define bfd_elf32_bfd_reloc_type_lookup reloc_type_lookup | |
183 | #define ELF_ARCH bfd_arch_m68k | |
184 | /* end code generated by elf.el */ | |
185 | ||
186 | #define USE_RELA | |
252b5132 RH |
187 | \f |
188 | /* Functions for the m68k ELF linker. */ | |
189 | ||
190 | /* The name of the dynamic interpreter. This is put in the .interp | |
191 | section. */ | |
192 | ||
193 | #define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1" | |
194 | ||
195 | /* The size in bytes of an entry in the procedure linkage table. */ | |
196 | ||
197 | #define PLT_ENTRY_SIZE 20 | |
198 | ||
199 | /* The first entry in a procedure linkage table looks like this. See | |
200 | the SVR4 ABI m68k supplement to see how this works. */ | |
201 | ||
202 | static const bfd_byte elf_m68k_plt0_entry[PLT_ENTRY_SIZE] = | |
203 | { | |
204 | 0x2f, 0x3b, 0x01, 0x70, /* move.l (%pc,addr),-(%sp) */ | |
205 | 0, 0, 0, 0, /* replaced with offset to .got + 4. */ | |
206 | 0x4e, 0xfb, 0x01, 0x71, /* jmp ([%pc,addr]) */ | |
207 | 0, 0, 0, 0, /* replaced with offset to .got + 8. */ | |
208 | 0, 0, 0, 0 /* pad out to 20 bytes. */ | |
209 | }; | |
210 | ||
211 | /* Subsequent entries in a procedure linkage table look like this. */ | |
212 | ||
213 | static const bfd_byte elf_m68k_plt_entry[PLT_ENTRY_SIZE] = | |
214 | { | |
215 | 0x4e, 0xfb, 0x01, 0x71, /* jmp ([%pc,symbol@GOTPC]) */ | |
216 | 0, 0, 0, 0, /* replaced with offset to symbol's .got entry. */ | |
217 | 0x2f, 0x3c, /* move.l #offset,-(%sp) */ | |
218 | 0, 0, 0, 0, /* replaced with offset into relocation table. */ | |
219 | 0x60, 0xff, /* bra.l .plt */ | |
220 | 0, 0, 0, 0 /* replaced with offset to start of .plt. */ | |
221 | }; | |
222 | ||
9e1281c7 CM |
223 | #define CPU32_FLAG(abfd) (elf_elfheader (abfd)->e_flags & EF_CPU32) |
224 | ||
225 | #define PLT_CPU32_ENTRY_SIZE 24 | |
226 | /* Procedure linkage table entries for the cpu32 */ | |
227 | static const bfd_byte elf_cpu32_plt0_entry[PLT_CPU32_ENTRY_SIZE] = | |
228 | { | |
6091b433 | 229 | 0x2f, 0x3b, 0x01, 0x70, /* move.l (%pc,addr),-(%sp) */ |
9e1281c7 | 230 | 0, 0, 0, 0, /* replaced with offset to .got + 4. */ |
6091b433 | 231 | 0x22, 0x7b, 0x01, 0x70, /* moveal %pc@(0xc), %a1 */ |
c3668558 | 232 | 0, 0, 0, 0, /* replace with offset to .got +8. */ |
6091b433 | 233 | 0x4e, 0xd1, /* jmp %a1@ */ |
9e1281c7 CM |
234 | 0, 0, 0, 0, /* pad out to 24 bytes. */ |
235 | 0, 0 | |
236 | }; | |
237 | ||
238 | static const bfd_byte elf_cpu32_plt_entry[PLT_CPU32_ENTRY_SIZE] = | |
239 | { | |
1ca42bad | 240 | 0x22, 0x7b, 0x01, 0x70, /* moveal %pc@(0xc), %a1 */ |
9e1281c7 | 241 | 0, 0, 0, 0, /* replaced with offset to symbol's .got entry. */ |
1ca42bad | 242 | 0x4e, 0xd1, /* jmp %a1@ */ |
9e1281c7 CM |
243 | 0x2f, 0x3c, /* move.l #offset,-(%sp) */ |
244 | 0, 0, 0, 0, /* replaced with offset into relocation table. */ | |
245 | 0x60, 0xff, /* bra.l .plt */ | |
246 | 0, 0, 0, 0, /* replaced with offset to start of .plt. */ | |
247 | 0, 0 | |
248 | }; | |
249 | ||
252b5132 RH |
250 | /* The m68k linker needs to keep track of the number of relocs that it |
251 | decides to copy in check_relocs for each symbol. This is so that it | |
252 | can discard PC relative relocs if it doesn't need them when linking | |
253 | with -Bsymbolic. We store the information in a field extending the | |
254 | regular ELF linker hash table. */ | |
255 | ||
256 | /* This structure keeps track of the number of PC relative relocs we have | |
257 | copied for a given symbol. */ | |
258 | ||
259 | struct elf_m68k_pcrel_relocs_copied | |
260 | { | |
261 | /* Next section. */ | |
262 | struct elf_m68k_pcrel_relocs_copied *next; | |
263 | /* A section in dynobj. */ | |
264 | asection *section; | |
265 | /* Number of relocs copied in this section. */ | |
266 | bfd_size_type count; | |
267 | }; | |
268 | ||
269 | /* m68k ELF linker hash entry. */ | |
270 | ||
271 | struct elf_m68k_link_hash_entry | |
272 | { | |
273 | struct elf_link_hash_entry root; | |
274 | ||
275 | /* Number of PC relative relocs copied for this symbol. */ | |
276 | struct elf_m68k_pcrel_relocs_copied *pcrel_relocs_copied; | |
277 | }; | |
278 | ||
279 | /* m68k ELF linker hash table. */ | |
280 | ||
281 | struct elf_m68k_link_hash_table | |
282 | { | |
283 | struct elf_link_hash_table root; | |
284 | }; | |
285 | ||
286 | /* Declare this now that the above structures are defined. */ | |
287 | ||
288 | static boolean elf_m68k_discard_copies | |
289 | PARAMS ((struct elf_m68k_link_hash_entry *, PTR)); | |
290 | ||
291 | /* Traverse an m68k ELF linker hash table. */ | |
292 | ||
293 | #define elf_m68k_link_hash_traverse(table, func, info) \ | |
294 | (elf_link_hash_traverse \ | |
295 | (&(table)->root, \ | |
296 | (boolean (*) PARAMS ((struct elf_link_hash_entry *, PTR))) (func), \ | |
297 | (info))) | |
298 | ||
299 | /* Get the m68k ELF linker hash table from a link_info structure. */ | |
300 | ||
301 | #define elf_m68k_hash_table(p) \ | |
302 | ((struct elf_m68k_link_hash_table *) (p)->hash) | |
303 | ||
304 | /* Create an entry in an m68k ELF linker hash table. */ | |
305 | ||
306 | static struct bfd_hash_entry * | |
307 | elf_m68k_link_hash_newfunc (entry, table, string) | |
308 | struct bfd_hash_entry *entry; | |
309 | struct bfd_hash_table *table; | |
310 | const char *string; | |
311 | { | |
312 | struct elf_m68k_link_hash_entry *ret = | |
313 | (struct elf_m68k_link_hash_entry *) entry; | |
314 | ||
315 | /* Allocate the structure if it has not already been allocated by a | |
316 | subclass. */ | |
317 | if (ret == (struct elf_m68k_link_hash_entry *) NULL) | |
318 | ret = ((struct elf_m68k_link_hash_entry *) | |
319 | bfd_hash_allocate (table, | |
320 | sizeof (struct elf_m68k_link_hash_entry))); | |
321 | if (ret == (struct elf_m68k_link_hash_entry *) NULL) | |
322 | return (struct bfd_hash_entry *) ret; | |
323 | ||
324 | /* Call the allocation method of the superclass. */ | |
325 | ret = ((struct elf_m68k_link_hash_entry *) | |
326 | _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret, | |
327 | table, string)); | |
328 | if (ret != (struct elf_m68k_link_hash_entry *) NULL) | |
329 | { | |
330 | ret->pcrel_relocs_copied = NULL; | |
331 | } | |
332 | ||
333 | return (struct bfd_hash_entry *) ret; | |
334 | } | |
335 | ||
336 | /* Create an m68k ELF linker hash table. */ | |
337 | ||
338 | static struct bfd_link_hash_table * | |
339 | elf_m68k_link_hash_table_create (abfd) | |
340 | bfd *abfd; | |
341 | { | |
342 | struct elf_m68k_link_hash_table *ret; | |
343 | ||
344 | ret = ((struct elf_m68k_link_hash_table *) | |
345 | bfd_alloc (abfd, sizeof (struct elf_m68k_link_hash_table))); | |
346 | if (ret == (struct elf_m68k_link_hash_table *) NULL) | |
347 | return NULL; | |
348 | ||
349 | if (! _bfd_elf_link_hash_table_init (&ret->root, abfd, | |
350 | elf_m68k_link_hash_newfunc)) | |
351 | { | |
352 | bfd_release (abfd, ret); | |
353 | return NULL; | |
354 | } | |
355 | ||
356 | return &ret->root.root; | |
357 | } | |
358 | ||
9e1281c7 CM |
359 | /* Keep m68k-specific flags in the ELF header */ |
360 | static boolean | |
361 | elf32_m68k_set_private_flags (abfd, flags) | |
362 | bfd *abfd; | |
363 | flagword flags; | |
364 | { | |
365 | elf_elfheader (abfd)->e_flags = flags; | |
366 | elf_flags_init (abfd) = true; | |
367 | return true; | |
368 | } | |
369 | ||
370 | /* Copy m68k-specific data from one module to another */ | |
371 | static boolean | |
372 | elf32_m68k_copy_private_bfd_data (ibfd, obfd) | |
373 | bfd *ibfd; | |
374 | bfd *obfd; | |
375 | { | |
376 | flagword in_flags; | |
377 | ||
378 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour | |
379 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) | |
380 | return true; | |
c3668558 | 381 | |
9e1281c7 | 382 | in_flags = elf_elfheader (ibfd)->e_flags; |
c3668558 | 383 | |
9e1281c7 CM |
384 | elf_elfheader (obfd)->e_flags = in_flags; |
385 | elf_flags_init (obfd) = true; | |
c3668558 | 386 | |
9e1281c7 CM |
387 | return true; |
388 | } | |
389 | ||
9e1281c7 CM |
390 | /* Merge backend specific data from an object file to the output |
391 | object file when linking. */ | |
392 | static boolean | |
393 | elf32_m68k_merge_private_bfd_data (ibfd, obfd) | |
394 | bfd *ibfd; | |
395 | bfd *obfd; | |
396 | { | |
397 | flagword out_flags; | |
398 | flagword in_flags; | |
399 | ||
400 | if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour | |
401 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) | |
402 | return true; | |
403 | ||
404 | in_flags = elf_elfheader (ibfd)->e_flags; | |
405 | out_flags = elf_elfheader (obfd)->e_flags; | |
406 | ||
407 | if (!elf_flags_init (obfd)) | |
408 | { | |
409 | elf_flags_init (obfd) = true; | |
410 | elf_elfheader (obfd)->e_flags = in_flags; | |
411 | } | |
412 | ||
413 | return true; | |
414 | } | |
415 | ||
416 | /* Display the flags field */ | |
417 | static boolean | |
418 | elf32_m68k_print_private_bfd_data (abfd, ptr) | |
419 | bfd *abfd; | |
420 | PTR ptr; | |
421 | { | |
422 | FILE *file = (FILE *) ptr; | |
423 | ||
424 | BFD_ASSERT (abfd != NULL && ptr != NULL); | |
425 | ||
426 | /* Print normal ELF private data. */ | |
427 | _bfd_elf_print_private_bfd_data (abfd, ptr); | |
428 | ||
429 | /* Ignore init flag - it may not be set, despite the flags field containing valid data. */ | |
430 | ||
431 | /* xgettext:c-format */ | |
432 | fprintf (file, _ ("private flags = %lx:"), elf_elfheader (abfd)->e_flags); | |
433 | ||
434 | if (elf_elfheader (abfd)->e_flags & EF_CPU32) | |
435 | fprintf (file, _ (" [cpu32]")); | |
436 | ||
437 | fputc ('\n', file); | |
438 | ||
439 | return true; | |
440 | } | |
252b5132 RH |
441 | /* Look through the relocs for a section during the first phase, and |
442 | allocate space in the global offset table or procedure linkage | |
443 | table. */ | |
444 | ||
445 | static boolean | |
446 | elf_m68k_check_relocs (abfd, info, sec, relocs) | |
447 | bfd *abfd; | |
448 | struct bfd_link_info *info; | |
449 | asection *sec; | |
450 | const Elf_Internal_Rela *relocs; | |
451 | { | |
452 | bfd *dynobj; | |
453 | Elf_Internal_Shdr *symtab_hdr; | |
454 | struct elf_link_hash_entry **sym_hashes; | |
455 | bfd_signed_vma *local_got_refcounts; | |
456 | const Elf_Internal_Rela *rel; | |
457 | const Elf_Internal_Rela *rel_end; | |
458 | asection *sgot; | |
459 | asection *srelgot; | |
460 | asection *sreloc; | |
461 | ||
462 | if (info->relocateable) | |
463 | return true; | |
464 | ||
465 | dynobj = elf_hash_table (info)->dynobj; | |
466 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
467 | sym_hashes = elf_sym_hashes (abfd); | |
468 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
469 | ||
470 | sgot = NULL; | |
471 | srelgot = NULL; | |
472 | sreloc = NULL; | |
473 | ||
474 | rel_end = relocs + sec->reloc_count; | |
475 | for (rel = relocs; rel < rel_end; rel++) | |
476 | { | |
477 | unsigned long r_symndx; | |
478 | struct elf_link_hash_entry *h; | |
479 | ||
480 | r_symndx = ELF32_R_SYM (rel->r_info); | |
481 | ||
482 | if (r_symndx < symtab_hdr->sh_info) | |
483 | h = NULL; | |
484 | else | |
485 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
486 | ||
487 | switch (ELF32_R_TYPE (rel->r_info)) | |
488 | { | |
489 | case R_68K_GOT8: | |
490 | case R_68K_GOT16: | |
491 | case R_68K_GOT32: | |
492 | if (h != NULL | |
493 | && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) | |
494 | break; | |
495 | /* Fall through. */ | |
496 | case R_68K_GOT8O: | |
497 | case R_68K_GOT16O: | |
498 | case R_68K_GOT32O: | |
499 | /* This symbol requires a global offset table entry. */ | |
500 | ||
501 | if (dynobj == NULL) | |
502 | { | |
503 | /* Create the .got section. */ | |
504 | elf_hash_table (info)->dynobj = dynobj = abfd; | |
505 | if (!_bfd_elf_create_got_section (dynobj, info)) | |
506 | return false; | |
507 | } | |
508 | ||
509 | if (sgot == NULL) | |
510 | { | |
511 | sgot = bfd_get_section_by_name (dynobj, ".got"); | |
512 | BFD_ASSERT (sgot != NULL); | |
513 | } | |
514 | ||
515 | if (srelgot == NULL | |
516 | && (h != NULL || info->shared)) | |
517 | { | |
518 | srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); | |
519 | if (srelgot == NULL) | |
520 | { | |
521 | srelgot = bfd_make_section (dynobj, ".rela.got"); | |
522 | if (srelgot == NULL | |
523 | || !bfd_set_section_flags (dynobj, srelgot, | |
524 | (SEC_ALLOC | |
525 | | SEC_LOAD | |
526 | | SEC_HAS_CONTENTS | |
527 | | SEC_IN_MEMORY | |
528 | | SEC_LINKER_CREATED | |
529 | | SEC_READONLY)) | |
530 | || !bfd_set_section_alignment (dynobj, srelgot, 2)) | |
531 | return false; | |
532 | } | |
533 | } | |
534 | ||
535 | if (h != NULL) | |
536 | { | |
537 | if (h->got.refcount == -1) | |
538 | { | |
539 | h->got.refcount = 1; | |
540 | ||
541 | /* Make sure this symbol is output as a dynamic symbol. */ | |
542 | if (h->dynindx == -1) | |
543 | { | |
544 | if (!bfd_elf32_link_record_dynamic_symbol (info, h)) | |
545 | return false; | |
546 | } | |
547 | ||
548 | /* Allocate space in the .got section. */ | |
549 | sgot->_raw_size += 4; | |
550 | /* Allocate relocation space. */ | |
551 | srelgot->_raw_size += sizeof (Elf32_External_Rela); | |
552 | } | |
553 | else | |
554 | h->got.refcount++; | |
555 | } | |
556 | else | |
557 | { | |
558 | /* This is a global offset table entry for a local symbol. */ | |
559 | if (local_got_refcounts == NULL) | |
560 | { | |
561 | size_t size; | |
562 | ||
563 | size = symtab_hdr->sh_info * sizeof (bfd_signed_vma); | |
564 | local_got_refcounts = ((bfd_signed_vma *) | |
565 | bfd_alloc (abfd, size)); | |
566 | if (local_got_refcounts == NULL) | |
567 | return false; | |
568 | elf_local_got_refcounts (abfd) = local_got_refcounts; | |
569 | memset (local_got_refcounts, -1, size); | |
570 | } | |
571 | if (local_got_refcounts[r_symndx] == -1) | |
572 | { | |
573 | local_got_refcounts[r_symndx] = 1; | |
574 | ||
575 | sgot->_raw_size += 4; | |
576 | if (info->shared) | |
577 | { | |
578 | /* If we are generating a shared object, we need to | |
579 | output a R_68K_RELATIVE reloc so that the dynamic | |
580 | linker can adjust this GOT entry. */ | |
581 | srelgot->_raw_size += sizeof (Elf32_External_Rela); | |
582 | } | |
583 | } | |
584 | else | |
585 | local_got_refcounts[r_symndx]++; | |
586 | } | |
587 | break; | |
588 | ||
589 | case R_68K_PLT8: | |
590 | case R_68K_PLT16: | |
591 | case R_68K_PLT32: | |
592 | /* This symbol requires a procedure linkage table entry. We | |
593 | actually build the entry in adjust_dynamic_symbol, | |
594 | because this might be a case of linking PIC code which is | |
595 | never referenced by a dynamic object, in which case we | |
596 | don't need to generate a procedure linkage table entry | |
597 | after all. */ | |
598 | ||
599 | /* If this is a local symbol, we resolve it directly without | |
600 | creating a procedure linkage table entry. */ | |
601 | if (h == NULL) | |
602 | continue; | |
603 | ||
604 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; | |
605 | if (h->plt.refcount == -1) | |
606 | h->plt.refcount = 1; | |
607 | else | |
608 | h->plt.refcount++; | |
609 | break; | |
610 | ||
611 | case R_68K_PLT8O: | |
612 | case R_68K_PLT16O: | |
613 | case R_68K_PLT32O: | |
614 | /* This symbol requires a procedure linkage table entry. */ | |
615 | ||
616 | if (h == NULL) | |
617 | { | |
618 | /* It does not make sense to have this relocation for a | |
619 | local symbol. FIXME: does it? How to handle it if | |
620 | it does make sense? */ | |
621 | bfd_set_error (bfd_error_bad_value); | |
622 | return false; | |
623 | } | |
624 | ||
625 | /* Make sure this symbol is output as a dynamic symbol. */ | |
626 | if (h->dynindx == -1) | |
627 | { | |
628 | if (!bfd_elf32_link_record_dynamic_symbol (info, h)) | |
629 | return false; | |
630 | } | |
631 | ||
632 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; | |
633 | if (h->plt.refcount == -1) | |
634 | h->plt.refcount = 1; | |
635 | else | |
636 | h->plt.refcount++; | |
637 | break; | |
638 | ||
639 | case R_68K_PC8: | |
640 | case R_68K_PC16: | |
641 | case R_68K_PC32: | |
642 | /* If we are creating a shared library and this is not a local | |
643 | symbol, we need to copy the reloc into the shared library. | |
644 | However when linking with -Bsymbolic and this is a global | |
645 | symbol which is defined in an object we are including in the | |
646 | link (i.e., DEF_REGULAR is set), then we can resolve the | |
647 | reloc directly. At this point we have not seen all the input | |
648 | files, so it is possible that DEF_REGULAR is not set now but | |
649 | will be set later (it is never cleared). We account for that | |
650 | possibility below by storing information in the | |
651 | pcrel_relocs_copied field of the hash table entry. */ | |
652 | if (!(info->shared | |
653 | && (sec->flags & SEC_ALLOC) != 0 | |
654 | && h != NULL | |
655 | && (!info->symbolic | |
656 | || (h->elf_link_hash_flags | |
657 | & ELF_LINK_HASH_DEF_REGULAR) == 0))) | |
658 | { | |
659 | if (h != NULL) | |
660 | { | |
661 | /* Make sure a plt entry is created for this symbol if | |
662 | it turns out to be a function defined by a dynamic | |
663 | object. */ | |
664 | if (h->plt.refcount == -1) | |
665 | h->plt.refcount = 1; | |
666 | else | |
667 | h->plt.refcount++; | |
668 | } | |
669 | break; | |
670 | } | |
671 | /* Fall through. */ | |
672 | case R_68K_8: | |
673 | case R_68K_16: | |
674 | case R_68K_32: | |
675 | if (h != NULL) | |
676 | { | |
677 | /* Make sure a plt entry is created for this symbol if it | |
678 | turns out to be a function defined by a dynamic object. */ | |
679 | if (h->plt.refcount == -1) | |
680 | h->plt.refcount = 1; | |
681 | else | |
682 | h->plt.refcount++; | |
683 | } | |
684 | ||
685 | /* If we are creating a shared library, we need to copy the | |
686 | reloc into the shared library. */ | |
687 | if (info->shared | |
688 | && (sec->flags & SEC_ALLOC) != 0) | |
689 | { | |
690 | /* When creating a shared object, we must copy these | |
691 | reloc types into the output file. We create a reloc | |
692 | section in dynobj and make room for this reloc. */ | |
693 | if (sreloc == NULL) | |
694 | { | |
695 | const char *name; | |
696 | ||
697 | name = (bfd_elf_string_from_elf_section | |
698 | (abfd, | |
699 | elf_elfheader (abfd)->e_shstrndx, | |
700 | elf_section_data (sec)->rel_hdr.sh_name)); | |
701 | if (name == NULL) | |
702 | return false; | |
703 | ||
704 | BFD_ASSERT (strncmp (name, ".rela", 5) == 0 | |
705 | && strcmp (bfd_get_section_name (abfd, sec), | |
706 | name + 5) == 0); | |
707 | ||
708 | sreloc = bfd_get_section_by_name (dynobj, name); | |
709 | if (sreloc == NULL) | |
710 | { | |
711 | sreloc = bfd_make_section (dynobj, name); | |
712 | if (sreloc == NULL | |
713 | || !bfd_set_section_flags (dynobj, sreloc, | |
714 | (SEC_ALLOC | |
715 | | SEC_LOAD | |
716 | | SEC_HAS_CONTENTS | |
717 | | SEC_IN_MEMORY | |
718 | | SEC_LINKER_CREATED | |
719 | | SEC_READONLY)) | |
720 | || !bfd_set_section_alignment (dynobj, sreloc, 2)) | |
721 | return false; | |
722 | } | |
aa91b392 AS |
723 | if (sec->flags & SEC_READONLY) |
724 | info->flags |= DF_TEXTREL; | |
252b5132 RH |
725 | } |
726 | ||
727 | sreloc->_raw_size += sizeof (Elf32_External_Rela); | |
728 | ||
729 | /* If we are linking with -Bsymbolic, we count the number of | |
730 | PC relative relocations we have entered for this symbol, | |
731 | so that we can discard them again if the symbol is later | |
732 | defined by a regular object. Note that this function is | |
733 | only called if we are using an m68kelf linker hash table, | |
734 | which means that h is really a pointer to an | |
735 | elf_m68k_link_hash_entry. */ | |
736 | if ((ELF32_R_TYPE (rel->r_info) == R_68K_PC8 | |
737 | || ELF32_R_TYPE (rel->r_info) == R_68K_PC16 | |
738 | || ELF32_R_TYPE (rel->r_info) == R_68K_PC32) | |
739 | && info->symbolic) | |
740 | { | |
741 | struct elf_m68k_link_hash_entry *eh; | |
742 | struct elf_m68k_pcrel_relocs_copied *p; | |
743 | ||
744 | eh = (struct elf_m68k_link_hash_entry *) h; | |
745 | ||
746 | for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next) | |
747 | if (p->section == sreloc) | |
748 | break; | |
749 | ||
750 | if (p == NULL) | |
751 | { | |
752 | p = ((struct elf_m68k_pcrel_relocs_copied *) | |
753 | bfd_alloc (dynobj, sizeof *p)); | |
754 | if (p == NULL) | |
755 | return false; | |
756 | p->next = eh->pcrel_relocs_copied; | |
757 | eh->pcrel_relocs_copied = p; | |
758 | p->section = sreloc; | |
759 | p->count = 0; | |
760 | } | |
761 | ||
762 | ++p->count; | |
763 | } | |
764 | } | |
765 | ||
766 | break; | |
767 | ||
768 | /* This relocation describes the C++ object vtable hierarchy. | |
769 | Reconstruct it for later use during GC. */ | |
770 | case R_68K_GNU_VTINHERIT: | |
771 | if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) | |
772 | return false; | |
773 | break; | |
774 | ||
775 | /* This relocation describes which C++ vtable entries are actually | |
776 | used. Record for later use during GC. */ | |
777 | case R_68K_GNU_VTENTRY: | |
778 | if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_addend)) | |
779 | return false; | |
780 | break; | |
781 | ||
782 | default: | |
783 | break; | |
784 | } | |
785 | } | |
786 | ||
787 | return true; | |
788 | } | |
789 | ||
790 | /* Return the section that should be marked against GC for a given | |
791 | relocation. */ | |
792 | ||
793 | static asection * | |
794 | elf_m68k_gc_mark_hook (abfd, info, rel, h, sym) | |
795 | bfd *abfd; | |
121089cb | 796 | struct bfd_link_info *info ATTRIBUTE_UNUSED; |
252b5132 RH |
797 | Elf_Internal_Rela *rel; |
798 | struct elf_link_hash_entry *h; | |
799 | Elf_Internal_Sym *sym; | |
800 | { | |
801 | if (h != NULL) | |
802 | { | |
803 | switch (ELF32_R_TYPE (rel->r_info)) | |
804 | { | |
805 | case R_68K_GNU_VTINHERIT: | |
806 | case R_68K_GNU_VTENTRY: | |
807 | break; | |
808 | ||
809 | default: | |
810 | switch (h->root.type) | |
811 | { | |
812 | default: | |
813 | break; | |
814 | ||
815 | case bfd_link_hash_defined: | |
816 | case bfd_link_hash_defweak: | |
817 | return h->root.u.def.section; | |
818 | ||
819 | case bfd_link_hash_common: | |
820 | return h->root.u.c.p->section; | |
821 | } | |
822 | } | |
823 | } | |
824 | else | |
825 | { | |
826 | if (!(elf_bad_symtab (abfd) | |
827 | && ELF_ST_BIND (sym->st_info) != STB_LOCAL) | |
828 | && ! ((sym->st_shndx <= 0 || sym->st_shndx >= SHN_LORESERVE) | |
829 | && sym->st_shndx != SHN_COMMON)) | |
830 | { | |
831 | return bfd_section_from_elf_index (abfd, sym->st_shndx); | |
832 | } | |
833 | } | |
834 | ||
835 | return NULL; | |
836 | } | |
837 | ||
838 | /* Update the got entry reference counts for the section being removed. */ | |
839 | ||
840 | static boolean | |
841 | elf_m68k_gc_sweep_hook (abfd, info, sec, relocs) | |
842 | bfd *abfd; | |
843 | struct bfd_link_info *info; | |
844 | asection *sec; | |
845 | const Elf_Internal_Rela *relocs; | |
846 | { | |
847 | Elf_Internal_Shdr *symtab_hdr; | |
848 | struct elf_link_hash_entry **sym_hashes; | |
849 | bfd_signed_vma *local_got_refcounts; | |
850 | const Elf_Internal_Rela *rel, *relend; | |
851 | unsigned long r_symndx; | |
852 | struct elf_link_hash_entry *h; | |
853 | bfd *dynobj; | |
dd5724d5 AM |
854 | asection *sgot; |
855 | asection *srelgot; | |
252b5132 RH |
856 | |
857 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
858 | sym_hashes = elf_sym_hashes (abfd); | |
859 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
860 | ||
861 | dynobj = elf_hash_table (info)->dynobj; | |
dd5724d5 AM |
862 | if (dynobj == NULL) |
863 | return true; | |
864 | ||
865 | sgot = bfd_get_section_by_name (dynobj, ".got"); | |
866 | srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); | |
252b5132 RH |
867 | |
868 | relend = relocs + sec->reloc_count; | |
869 | for (rel = relocs; rel < relend; rel++) | |
870 | { | |
871 | switch (ELF32_R_TYPE (rel->r_info)) | |
872 | { | |
873 | case R_68K_GOT8: | |
874 | case R_68K_GOT16: | |
875 | case R_68K_GOT32: | |
876 | case R_68K_GOT8O: | |
877 | case R_68K_GOT16O: | |
878 | case R_68K_GOT32O: | |
879 | r_symndx = ELF32_R_SYM (rel->r_info); | |
880 | if (r_symndx >= symtab_hdr->sh_info) | |
881 | { | |
882 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
883 | if (h->got.refcount > 0) | |
884 | { | |
885 | --h->got.refcount; | |
886 | if (h->got.refcount == 0) | |
887 | { | |
888 | /* We don't need the .got entry any more. */ | |
889 | sgot->_raw_size -= 4; | |
890 | srelgot->_raw_size -= sizeof (Elf32_External_Rela); | |
891 | } | |
892 | } | |
893 | } | |
dd5724d5 | 894 | else if (local_got_refcounts != NULL) |
252b5132 RH |
895 | { |
896 | if (local_got_refcounts[r_symndx] > 0) | |
897 | { | |
898 | --local_got_refcounts[r_symndx]; | |
899 | if (local_got_refcounts[r_symndx] == 0) | |
900 | { | |
901 | /* We don't need the .got entry any more. */ | |
902 | sgot->_raw_size -= 4; | |
903 | if (info->shared) | |
904 | srelgot->_raw_size -= sizeof (Elf32_External_Rela); | |
905 | } | |
906 | } | |
907 | } | |
908 | break; | |
909 | ||
910 | case R_68K_PLT8: | |
911 | case R_68K_PLT16: | |
912 | case R_68K_PLT32: | |
913 | case R_68K_PLT8O: | |
914 | case R_68K_PLT16O: | |
915 | case R_68K_PLT32O: | |
916 | case R_68K_PC8: | |
917 | case R_68K_PC16: | |
918 | case R_68K_PC32: | |
919 | case R_68K_8: | |
920 | case R_68K_16: | |
921 | case R_68K_32: | |
922 | r_symndx = ELF32_R_SYM (rel->r_info); | |
923 | if (r_symndx >= symtab_hdr->sh_info) | |
924 | { | |
925 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
926 | if (h->plt.refcount > 0) | |
927 | --h->plt.refcount; | |
928 | } | |
929 | break; | |
930 | ||
931 | default: | |
932 | break; | |
933 | } | |
934 | } | |
935 | ||
936 | return true; | |
937 | } | |
938 | ||
252b5132 RH |
939 | /* Adjust a symbol defined by a dynamic object and referenced by a |
940 | regular object. The current definition is in some section of the | |
941 | dynamic object, but we're not including those sections. We have to | |
942 | change the definition to something the rest of the link can | |
943 | understand. */ | |
944 | ||
945 | static boolean | |
946 | elf_m68k_adjust_dynamic_symbol (info, h) | |
947 | struct bfd_link_info *info; | |
948 | struct elf_link_hash_entry *h; | |
949 | { | |
950 | bfd *dynobj; | |
951 | asection *s; | |
952 | unsigned int power_of_two; | |
953 | ||
954 | dynobj = elf_hash_table (info)->dynobj; | |
955 | ||
956 | /* Make sure we know what is going on here. */ | |
957 | BFD_ASSERT (dynobj != NULL | |
958 | && ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) | |
959 | || h->weakdef != NULL | |
960 | || ((h->elf_link_hash_flags | |
961 | & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
962 | && (h->elf_link_hash_flags | |
963 | & ELF_LINK_HASH_REF_REGULAR) != 0 | |
964 | && (h->elf_link_hash_flags | |
965 | & ELF_LINK_HASH_DEF_REGULAR) == 0))); | |
966 | ||
967 | /* If this is a function, put it in the procedure linkage table. We | |
968 | will fill in the contents of the procedure linkage table later, | |
969 | when we know the address of the .got section. */ | |
970 | if (h->type == STT_FUNC | |
971 | || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0) | |
972 | { | |
973 | if (! info->shared | |
974 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0 | |
975 | && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) == 0 | |
976 | /* We must always create the plt entry if it was referenced | |
977 | by a PLTxxO relocation. In this case we already recorded | |
978 | it as a dynamic symbol. */ | |
979 | && h->dynindx == -1) | |
980 | { | |
981 | /* This case can occur if we saw a PLTxx reloc in an input | |
982 | file, but the symbol was never referred to by a dynamic | |
983 | object. In such a case, we don't actually need to build | |
984 | a procedure linkage table, and we can just do a PCxx | |
985 | reloc instead. */ | |
986 | BFD_ASSERT ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0); | |
987 | h->plt.offset = (bfd_vma) -1; | |
988 | return true; | |
989 | } | |
990 | ||
991 | /* GC may have rendered this entry unused. */ | |
992 | if (h->plt.refcount <= 0) | |
993 | { | |
994 | h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; | |
995 | h->plt.offset = (bfd_vma) -1; | |
996 | return true; | |
997 | } | |
998 | ||
999 | /* Make sure this symbol is output as a dynamic symbol. */ | |
1000 | if (h->dynindx == -1) | |
1001 | { | |
1002 | if (! bfd_elf32_link_record_dynamic_symbol (info, h)) | |
1003 | return false; | |
1004 | } | |
1005 | ||
1006 | s = bfd_get_section_by_name (dynobj, ".plt"); | |
1007 | BFD_ASSERT (s != NULL); | |
1008 | ||
1009 | /* If this is the first .plt entry, make room for the special | |
1010 | first entry. */ | |
1011 | if (s->_raw_size == 0) | |
70f06c4a AS |
1012 | { |
1013 | if (CPU32_FLAG (dynobj)) | |
1014 | s->_raw_size += PLT_CPU32_ENTRY_SIZE; | |
1015 | else | |
1016 | s->_raw_size += PLT_ENTRY_SIZE; | |
1017 | } | |
252b5132 RH |
1018 | |
1019 | /* If this symbol is not defined in a regular file, and we are | |
1020 | not generating a shared library, then set the symbol to this | |
1021 | location in the .plt. This is required to make function | |
1022 | pointers compare as equal between the normal executable and | |
1023 | the shared library. */ | |
1024 | if (!info->shared | |
1025 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
1026 | { | |
1027 | h->root.u.def.section = s; | |
1028 | h->root.u.def.value = s->_raw_size; | |
1029 | } | |
1030 | ||
1031 | h->plt.offset = s->_raw_size; | |
1032 | ||
1033 | /* Make room for this entry. */ | |
9e1281c7 CM |
1034 | if (CPU32_FLAG (dynobj)) |
1035 | s->_raw_size += PLT_CPU32_ENTRY_SIZE; | |
1036 | else | |
1037 | s->_raw_size += PLT_ENTRY_SIZE; | |
252b5132 RH |
1038 | |
1039 | /* We also need to make an entry in the .got.plt section, which | |
1040 | will be placed in the .got section by the linker script. */ | |
1041 | ||
1042 | s = bfd_get_section_by_name (dynobj, ".got.plt"); | |
1043 | BFD_ASSERT (s != NULL); | |
1044 | s->_raw_size += 4; | |
1045 | ||
1046 | /* We also need to make an entry in the .rela.plt section. */ | |
1047 | ||
1048 | s = bfd_get_section_by_name (dynobj, ".rela.plt"); | |
1049 | BFD_ASSERT (s != NULL); | |
1050 | s->_raw_size += sizeof (Elf32_External_Rela); | |
1051 | ||
1052 | return true; | |
1053 | } | |
1054 | ||
1055 | /* Reinitialize the plt offset now that it is not used as a reference | |
1056 | count any more. */ | |
1057 | h->plt.offset = (bfd_vma) -1; | |
1058 | ||
1059 | /* If this is a weak symbol, and there is a real definition, the | |
1060 | processor independent code will have arranged for us to see the | |
1061 | real definition first, and we can just use the same value. */ | |
1062 | if (h->weakdef != NULL) | |
1063 | { | |
1064 | BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined | |
1065 | || h->weakdef->root.type == bfd_link_hash_defweak); | |
1066 | h->root.u.def.section = h->weakdef->root.u.def.section; | |
1067 | h->root.u.def.value = h->weakdef->root.u.def.value; | |
1068 | return true; | |
1069 | } | |
1070 | ||
1071 | /* This is a reference to a symbol defined by a dynamic object which | |
1072 | is not a function. */ | |
1073 | ||
1074 | /* If we are creating a shared library, we must presume that the | |
1075 | only references to the symbol are via the global offset table. | |
1076 | For such cases we need not do anything here; the relocations will | |
1077 | be handled correctly by relocate_section. */ | |
1078 | if (info->shared) | |
1079 | return true; | |
1080 | ||
1081 | /* We must allocate the symbol in our .dynbss section, which will | |
1082 | become part of the .bss section of the executable. There will be | |
1083 | an entry for this symbol in the .dynsym section. The dynamic | |
1084 | object will contain position independent code, so all references | |
1085 | from the dynamic object to this symbol will go through the global | |
1086 | offset table. The dynamic linker will use the .dynsym entry to | |
1087 | determine the address it must put in the global offset table, so | |
1088 | both the dynamic object and the regular object will refer to the | |
1089 | same memory location for the variable. */ | |
1090 | ||
1091 | s = bfd_get_section_by_name (dynobj, ".dynbss"); | |
1092 | BFD_ASSERT (s != NULL); | |
1093 | ||
1094 | /* We must generate a R_68K_COPY reloc to tell the dynamic linker to | |
1095 | copy the initial value out of the dynamic object and into the | |
1096 | runtime process image. We need to remember the offset into the | |
1097 | .rela.bss section we are going to use. */ | |
1098 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) | |
1099 | { | |
1100 | asection *srel; | |
1101 | ||
1102 | srel = bfd_get_section_by_name (dynobj, ".rela.bss"); | |
1103 | BFD_ASSERT (srel != NULL); | |
1104 | srel->_raw_size += sizeof (Elf32_External_Rela); | |
1105 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY; | |
1106 | } | |
1107 | ||
1108 | /* We need to figure out the alignment required for this symbol. I | |
1109 | have no idea how ELF linkers handle this. */ | |
1110 | power_of_two = bfd_log2 (h->size); | |
1111 | if (power_of_two > 3) | |
1112 | power_of_two = 3; | |
1113 | ||
1114 | /* Apply the required alignment. */ | |
1115 | s->_raw_size = BFD_ALIGN (s->_raw_size, | |
1116 | (bfd_size_type) (1 << power_of_two)); | |
1117 | if (power_of_two > bfd_get_section_alignment (dynobj, s)) | |
1118 | { | |
1119 | if (!bfd_set_section_alignment (dynobj, s, power_of_two)) | |
1120 | return false; | |
1121 | } | |
1122 | ||
1123 | /* Define the symbol as being at this point in the section. */ | |
1124 | h->root.u.def.section = s; | |
1125 | h->root.u.def.value = s->_raw_size; | |
1126 | ||
1127 | /* Increment the section size to make room for the symbol. */ | |
1128 | s->_raw_size += h->size; | |
1129 | ||
1130 | return true; | |
1131 | } | |
1132 | ||
1133 | /* Set the sizes of the dynamic sections. */ | |
1134 | ||
1135 | static boolean | |
1136 | elf_m68k_size_dynamic_sections (output_bfd, info) | |
aa91b392 | 1137 | bfd *output_bfd ATTRIBUTE_UNUSED; |
252b5132 RH |
1138 | struct bfd_link_info *info; |
1139 | { | |
1140 | bfd *dynobj; | |
1141 | asection *s; | |
1142 | boolean plt; | |
1143 | boolean relocs; | |
252b5132 RH |
1144 | |
1145 | dynobj = elf_hash_table (info)->dynobj; | |
1146 | BFD_ASSERT (dynobj != NULL); | |
1147 | ||
1148 | if (elf_hash_table (info)->dynamic_sections_created) | |
1149 | { | |
1150 | /* Set the contents of the .interp section to the interpreter. */ | |
1151 | if (!info->shared) | |
1152 | { | |
1153 | s = bfd_get_section_by_name (dynobj, ".interp"); | |
1154 | BFD_ASSERT (s != NULL); | |
1155 | s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER; | |
1156 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; | |
1157 | } | |
1158 | } | |
1159 | else | |
1160 | { | |
1161 | /* We may have created entries in the .rela.got section. | |
1162 | However, if we are not creating the dynamic sections, we will | |
1163 | not actually use these entries. Reset the size of .rela.got, | |
1164 | which will cause it to get stripped from the output file | |
1165 | below. */ | |
1166 | s = bfd_get_section_by_name (dynobj, ".rela.got"); | |
1167 | if (s != NULL) | |
1168 | s->_raw_size = 0; | |
1169 | } | |
1170 | ||
1171 | /* If this is a -Bsymbolic shared link, then we need to discard all PC | |
1172 | relative relocs against symbols defined in a regular object. We | |
1173 | allocated space for them in the check_relocs routine, but we will not | |
1174 | fill them in in the relocate_section routine. */ | |
1175 | if (info->shared && info->symbolic) | |
1176 | elf_m68k_link_hash_traverse (elf_m68k_hash_table (info), | |
1177 | elf_m68k_discard_copies, | |
1178 | (PTR) NULL); | |
1179 | ||
1180 | /* The check_relocs and adjust_dynamic_symbol entry points have | |
1181 | determined the sizes of the various dynamic sections. Allocate | |
1182 | memory for them. */ | |
1183 | plt = false; | |
1184 | relocs = false; | |
252b5132 RH |
1185 | for (s = dynobj->sections; s != NULL; s = s->next) |
1186 | { | |
1187 | const char *name; | |
1188 | boolean strip; | |
1189 | ||
1190 | if ((s->flags & SEC_LINKER_CREATED) == 0) | |
1191 | continue; | |
1192 | ||
1193 | /* It's OK to base decisions on the section name, because none | |
1194 | of the dynobj section names depend upon the input files. */ | |
1195 | name = bfd_get_section_name (dynobj, s); | |
1196 | ||
1197 | strip = false; | |
1198 | ||
1199 | if (strcmp (name, ".plt") == 0) | |
1200 | { | |
1201 | if (s->_raw_size == 0) | |
1202 | { | |
1203 | /* Strip this section if we don't need it; see the | |
1204 | comment below. */ | |
1205 | strip = true; | |
1206 | } | |
1207 | else | |
1208 | { | |
1209 | /* Remember whether there is a PLT. */ | |
1210 | plt = true; | |
1211 | } | |
1212 | } | |
1213 | else if (strncmp (name, ".rela", 5) == 0) | |
1214 | { | |
1215 | if (s->_raw_size == 0) | |
1216 | { | |
1217 | /* If we don't need this section, strip it from the | |
1218 | output file. This is mostly to handle .rela.bss and | |
1219 | .rela.plt. We must create both sections in | |
1220 | create_dynamic_sections, because they must be created | |
1221 | before the linker maps input sections to output | |
1222 | sections. The linker does that before | |
1223 | adjust_dynamic_symbol is called, and it is that | |
1224 | function which decides whether anything needs to go | |
1225 | into these sections. */ | |
1226 | strip = true; | |
1227 | } | |
1228 | else | |
1229 | { | |
aa91b392 | 1230 | relocs = true; |
252b5132 RH |
1231 | |
1232 | /* We use the reloc_count field as a counter if we need | |
1233 | to copy relocs into the output file. */ | |
1234 | s->reloc_count = 0; | |
1235 | } | |
1236 | } | |
1237 | else if (strncmp (name, ".got", 4) != 0) | |
1238 | { | |
1239 | /* It's not one of our sections, so don't allocate space. */ | |
1240 | continue; | |
1241 | } | |
1242 | ||
1243 | if (strip) | |
1244 | { | |
7f8d5fc9 | 1245 | _bfd_strip_section_from_output (info, s); |
252b5132 RH |
1246 | continue; |
1247 | } | |
1248 | ||
1249 | /* Allocate memory for the section contents. */ | |
7a9af8c4 NC |
1250 | /* FIXME: This should be a call to bfd_alloc not bfd_zalloc. |
1251 | Unused entries should be reclaimed before the section's contents | |
1252 | are written out, but at the moment this does not happen. Thus in | |
1253 | order to prevent writing out garbage, we initialise the section's | |
1254 | contents to zero. */ | |
1255 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size); | |
252b5132 RH |
1256 | if (s->contents == NULL && s->_raw_size != 0) |
1257 | return false; | |
1258 | } | |
1259 | ||
1260 | if (elf_hash_table (info)->dynamic_sections_created) | |
1261 | { | |
1262 | /* Add some entries to the .dynamic section. We fill in the | |
1263 | values later, in elf_m68k_finish_dynamic_sections, but we | |
1264 | must add the entries now so that we get the correct size for | |
1265 | the .dynamic section. The DT_DEBUG entry is filled in by the | |
1266 | dynamic linker and used by the debugger. */ | |
1267 | if (!info->shared) | |
1268 | { | |
1269 | if (!bfd_elf32_add_dynamic_entry (info, DT_DEBUG, 0)) | |
1270 | return false; | |
1271 | } | |
1272 | ||
1273 | if (plt) | |
1274 | { | |
1275 | if (!bfd_elf32_add_dynamic_entry (info, DT_PLTGOT, 0) | |
1276 | || !bfd_elf32_add_dynamic_entry (info, DT_PLTRELSZ, 0) | |
1277 | || !bfd_elf32_add_dynamic_entry (info, DT_PLTREL, DT_RELA) | |
1278 | || !bfd_elf32_add_dynamic_entry (info, DT_JMPREL, 0)) | |
1279 | return false; | |
1280 | } | |
1281 | ||
1282 | if (relocs) | |
1283 | { | |
1284 | if (!bfd_elf32_add_dynamic_entry (info, DT_RELA, 0) | |
1285 | || !bfd_elf32_add_dynamic_entry (info, DT_RELASZ, 0) | |
1286 | || !bfd_elf32_add_dynamic_entry (info, DT_RELAENT, | |
1287 | sizeof (Elf32_External_Rela))) | |
1288 | return false; | |
1289 | } | |
1290 | ||
aa91b392 | 1291 | if ((info->flags & DF_TEXTREL) != 0) |
252b5132 RH |
1292 | { |
1293 | if (!bfd_elf32_add_dynamic_entry (info, DT_TEXTREL, 0)) | |
1294 | return false; | |
1295 | } | |
1296 | } | |
1297 | ||
252b5132 RH |
1298 | return true; |
1299 | } | |
1300 | ||
1301 | /* This function is called via elf_m68k_link_hash_traverse if we are | |
1302 | creating a shared object with -Bsymbolic. It discards the space | |
1303 | allocated to copy PC relative relocs against symbols which are defined | |
1304 | in regular objects. We allocated space for them in the check_relocs | |
1305 | routine, but we won't fill them in in the relocate_section routine. */ | |
1306 | ||
252b5132 RH |
1307 | static boolean |
1308 | elf_m68k_discard_copies (h, ignore) | |
1309 | struct elf_m68k_link_hash_entry *h; | |
121089cb | 1310 | PTR ignore ATTRIBUTE_UNUSED; |
252b5132 RH |
1311 | { |
1312 | struct elf_m68k_pcrel_relocs_copied *s; | |
1313 | ||
1314 | /* We only discard relocs for symbols defined in a regular object. */ | |
1315 | if ((h->root.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
1316 | return true; | |
1317 | ||
1318 | for (s = h->pcrel_relocs_copied; s != NULL; s = s->next) | |
1319 | s->section->_raw_size -= s->count * sizeof (Elf32_External_Rela); | |
1320 | ||
1321 | return true; | |
1322 | } | |
1323 | ||
1324 | /* Relocate an M68K ELF section. */ | |
1325 | ||
1326 | static boolean | |
1327 | elf_m68k_relocate_section (output_bfd, info, input_bfd, input_section, | |
1328 | contents, relocs, local_syms, local_sections) | |
1329 | bfd *output_bfd; | |
1330 | struct bfd_link_info *info; | |
1331 | bfd *input_bfd; | |
1332 | asection *input_section; | |
1333 | bfd_byte *contents; | |
1334 | Elf_Internal_Rela *relocs; | |
1335 | Elf_Internal_Sym *local_syms; | |
1336 | asection **local_sections; | |
1337 | { | |
1338 | bfd *dynobj; | |
1339 | Elf_Internal_Shdr *symtab_hdr; | |
1340 | struct elf_link_hash_entry **sym_hashes; | |
1341 | bfd_vma *local_got_offsets; | |
1342 | asection *sgot; | |
1343 | asection *splt; | |
1344 | asection *sreloc; | |
1345 | Elf_Internal_Rela *rel; | |
1346 | Elf_Internal_Rela *relend; | |
1347 | ||
1348 | dynobj = elf_hash_table (info)->dynobj; | |
1349 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
1350 | sym_hashes = elf_sym_hashes (input_bfd); | |
1351 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
1352 | ||
1353 | sgot = NULL; | |
1354 | splt = NULL; | |
1355 | sreloc = NULL; | |
1356 | ||
1357 | rel = relocs; | |
1358 | relend = relocs + input_section->reloc_count; | |
1359 | for (; rel < relend; rel++) | |
1360 | { | |
1361 | int r_type; | |
1362 | reloc_howto_type *howto; | |
1363 | unsigned long r_symndx; | |
1364 | struct elf_link_hash_entry *h; | |
1365 | Elf_Internal_Sym *sym; | |
1366 | asection *sec; | |
1367 | bfd_vma relocation; | |
1368 | bfd_reloc_status_type r; | |
1369 | ||
1370 | r_type = ELF32_R_TYPE (rel->r_info); | |
1371 | if (r_type < 0 || r_type >= (int) R_68K_max) | |
1372 | { | |
1373 | bfd_set_error (bfd_error_bad_value); | |
1374 | return false; | |
1375 | } | |
1376 | howto = howto_table + r_type; | |
1377 | ||
1378 | r_symndx = ELF32_R_SYM (rel->r_info); | |
1379 | ||
1380 | if (info->relocateable) | |
1381 | { | |
1382 | /* This is a relocateable link. We don't have to change | |
1383 | anything, unless the reloc is against a section symbol, | |
1384 | in which case we have to adjust according to where the | |
1385 | section symbol winds up in the output section. */ | |
1386 | if (r_symndx < symtab_hdr->sh_info) | |
1387 | { | |
1388 | sym = local_syms + r_symndx; | |
1389 | if (ELF_ST_TYPE (sym->st_info) == STT_SECTION) | |
1390 | { | |
1391 | sec = local_sections[r_symndx]; | |
1392 | rel->r_addend += sec->output_offset + sym->st_value; | |
1393 | } | |
1394 | } | |
1395 | ||
1396 | continue; | |
1397 | } | |
1398 | ||
1399 | /* This is a final link. */ | |
1400 | h = NULL; | |
1401 | sym = NULL; | |
1402 | sec = NULL; | |
1403 | if (r_symndx < symtab_hdr->sh_info) | |
1404 | { | |
1405 | sym = local_syms + r_symndx; | |
1406 | sec = local_sections[r_symndx]; | |
1407 | relocation = (sec->output_section->vma | |
1408 | + sec->output_offset | |
1409 | + sym->st_value); | |
1410 | } | |
1411 | else | |
1412 | { | |
1413 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
1414 | while (h->root.type == bfd_link_hash_indirect | |
1415 | || h->root.type == bfd_link_hash_warning) | |
1416 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1417 | if (h->root.type == bfd_link_hash_defined | |
1418 | || h->root.type == bfd_link_hash_defweak) | |
1419 | { | |
1420 | sec = h->root.u.def.section; | |
1421 | if (((r_type == R_68K_PLT8 | |
1422 | || r_type == R_68K_PLT16 | |
1423 | || r_type == R_68K_PLT32 | |
1424 | || r_type == R_68K_PLT8O | |
1425 | || r_type == R_68K_PLT16O | |
1426 | || r_type == R_68K_PLT32O) | |
1427 | && h->plt.offset != (bfd_vma) -1 | |
1428 | && elf_hash_table (info)->dynamic_sections_created) | |
1429 | || ((r_type == R_68K_GOT8O | |
1430 | || r_type == R_68K_GOT16O | |
1431 | || r_type == R_68K_GOT32O | |
1432 | || ((r_type == R_68K_GOT8 | |
1433 | || r_type == R_68K_GOT16 | |
1434 | || r_type == R_68K_GOT32) | |
1435 | && strcmp (h->root.root.string, | |
1436 | "_GLOBAL_OFFSET_TABLE_") != 0)) | |
1437 | && elf_hash_table (info)->dynamic_sections_created | |
1438 | && (! info->shared | |
1439 | || (! info->symbolic && h->dynindx != -1) | |
1440 | || (h->elf_link_hash_flags | |
1441 | & ELF_LINK_HASH_DEF_REGULAR) == 0)) | |
1442 | || (info->shared | |
1443 | && ((! info->symbolic && h->dynindx != -1) | |
1444 | || (h->elf_link_hash_flags | |
1445 | & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
95fc45e6 AS |
1446 | && ((input_section->flags & SEC_ALLOC) != 0 |
1447 | /* DWARF will emit R_68K_32 relocations in its | |
1448 | sections against symbols defined externally | |
1449 | in shared libraries. We can't do anything | |
1450 | with them here. */ | |
1451 | || ((input_section->flags & SEC_DEBUGGING) != 0 | |
1452 | && (h->elf_link_hash_flags | |
1453 | & ELF_LINK_HASH_DEF_DYNAMIC) != 0)) | |
252b5132 RH |
1454 | && (r_type == R_68K_8 |
1455 | || r_type == R_68K_16 | |
1456 | || r_type == R_68K_32 | |
1457 | || r_type == R_68K_PC8 | |
1458 | || r_type == R_68K_PC16 | |
1459 | || r_type == R_68K_PC32))) | |
1460 | { | |
1461 | /* In these cases, we don't need the relocation | |
1462 | value. We check specially because in some | |
1463 | obscure cases sec->output_section will be NULL. */ | |
1464 | relocation = 0; | |
1465 | } | |
1466 | else | |
1467 | relocation = (h->root.u.def.value | |
1468 | + sec->output_section->vma | |
1469 | + sec->output_offset); | |
1470 | } | |
1471 | else if (h->root.type == bfd_link_hash_undefweak) | |
1472 | relocation = 0; | |
3a27a730 L |
1473 | else if (info->shared && !info->symbolic |
1474 | && !info->no_undefined | |
1475 | && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) | |
252b5132 RH |
1476 | relocation = 0; |
1477 | else | |
1478 | { | |
1479 | if (!(info->callbacks->undefined_symbol | |
1480 | (info, h->root.root.string, input_bfd, | |
5cc7c785 | 1481 | input_section, rel->r_offset, |
3a27a730 L |
1482 | (!info->shared || info->no_undefined |
1483 | || ELF_ST_VISIBILITY (h->other))))) | |
252b5132 RH |
1484 | return false; |
1485 | relocation = 0; | |
1486 | } | |
1487 | } | |
1488 | ||
1489 | switch (r_type) | |
1490 | { | |
1491 | case R_68K_GOT8: | |
1492 | case R_68K_GOT16: | |
1493 | case R_68K_GOT32: | |
1494 | /* Relocation is to the address of the entry for this symbol | |
1495 | in the global offset table. */ | |
1496 | if (h != NULL | |
1497 | && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) | |
1498 | break; | |
1499 | /* Fall through. */ | |
1500 | case R_68K_GOT8O: | |
1501 | case R_68K_GOT16O: | |
1502 | case R_68K_GOT32O: | |
1503 | /* Relocation is the offset of the entry for this symbol in | |
1504 | the global offset table. */ | |
1505 | ||
1506 | { | |
1507 | bfd_vma off; | |
1508 | ||
1509 | if (sgot == NULL) | |
1510 | { | |
1511 | sgot = bfd_get_section_by_name (dynobj, ".got"); | |
1512 | BFD_ASSERT (sgot != NULL); | |
1513 | } | |
1514 | ||
1515 | if (h != NULL) | |
1516 | { | |
1517 | off = h->got.offset; | |
1518 | BFD_ASSERT (off != (bfd_vma) -1); | |
1519 | ||
1520 | if (!elf_hash_table (info)->dynamic_sections_created | |
1521 | || (info->shared | |
1522 | && (info->symbolic || h->dynindx == -1) | |
1523 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))) | |
1524 | { | |
1525 | /* This is actually a static link, or it is a | |
1526 | -Bsymbolic link and the symbol is defined | |
1527 | locally, or the symbol was forced to be local | |
1528 | because of a version file.. We must initialize | |
1529 | this entry in the global offset table. Since | |
1530 | the offset must always be a multiple of 4, we | |
1531 | use the least significant bit to record whether | |
1532 | we have initialized it already. | |
1533 | ||
1534 | When doing a dynamic link, we create a .rela.got | |
1535 | relocation entry to initialize the value. This | |
1536 | is done in the finish_dynamic_symbol routine. */ | |
1537 | if ((off & 1) != 0) | |
1538 | off &= ~1; | |
1539 | else | |
1540 | { | |
1541 | bfd_put_32 (output_bfd, relocation, | |
1542 | sgot->contents + off); | |
1543 | h->got.offset |= 1; | |
1544 | } | |
1545 | } | |
1546 | } | |
1547 | else | |
1548 | { | |
1549 | BFD_ASSERT (local_got_offsets != NULL | |
1550 | && local_got_offsets[r_symndx] != (bfd_vma) -1); | |
1551 | ||
1552 | off = local_got_offsets[r_symndx]; | |
1553 | ||
1554 | /* The offset must always be a multiple of 4. We use | |
1555 | the least significant bit to record whether we have | |
1556 | already generated the necessary reloc. */ | |
1557 | if ((off & 1) != 0) | |
1558 | off &= ~1; | |
1559 | else | |
1560 | { | |
1561 | bfd_put_32 (output_bfd, relocation, sgot->contents + off); | |
1562 | ||
1563 | if (info->shared) | |
1564 | { | |
1565 | asection *srelgot; | |
1566 | Elf_Internal_Rela outrel; | |
1567 | ||
1568 | srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); | |
1569 | BFD_ASSERT (srelgot != NULL); | |
1570 | ||
1571 | outrel.r_offset = (sgot->output_section->vma | |
1572 | + sgot->output_offset | |
1573 | + off); | |
1574 | outrel.r_info = ELF32_R_INFO (0, R_68K_RELATIVE); | |
1575 | outrel.r_addend = relocation; | |
1576 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, | |
1577 | (((Elf32_External_Rela *) | |
1578 | srelgot->contents) | |
1579 | + srelgot->reloc_count)); | |
1580 | ++srelgot->reloc_count; | |
1581 | } | |
1582 | ||
1583 | local_got_offsets[r_symndx] |= 1; | |
1584 | } | |
1585 | } | |
1586 | ||
1587 | relocation = sgot->output_offset + off; | |
1588 | if (r_type == R_68K_GOT8O | |
1589 | || r_type == R_68K_GOT16O | |
1590 | || r_type == R_68K_GOT32O) | |
1591 | { | |
1592 | /* This relocation does not use the addend. */ | |
1593 | rel->r_addend = 0; | |
1594 | } | |
1595 | else | |
1596 | relocation += sgot->output_section->vma; | |
1597 | } | |
1598 | break; | |
1599 | ||
1600 | case R_68K_PLT8: | |
1601 | case R_68K_PLT16: | |
1602 | case R_68K_PLT32: | |
1603 | /* Relocation is to the entry for this symbol in the | |
1604 | procedure linkage table. */ | |
1605 | ||
1606 | /* Resolve a PLTxx reloc against a local symbol directly, | |
1607 | without using the procedure linkage table. */ | |
1608 | if (h == NULL) | |
1609 | break; | |
1610 | ||
1611 | if (h->plt.offset == (bfd_vma) -1 | |
1612 | || !elf_hash_table (info)->dynamic_sections_created) | |
1613 | { | |
1614 | /* We didn't make a PLT entry for this symbol. This | |
1615 | happens when statically linking PIC code, or when | |
1616 | using -Bsymbolic. */ | |
1617 | break; | |
1618 | } | |
1619 | ||
1620 | if (splt == NULL) | |
1621 | { | |
1622 | splt = bfd_get_section_by_name (dynobj, ".plt"); | |
1623 | BFD_ASSERT (splt != NULL); | |
1624 | } | |
1625 | ||
1626 | relocation = (splt->output_section->vma | |
1627 | + splt->output_offset | |
1628 | + h->plt.offset); | |
1629 | break; | |
1630 | ||
1631 | case R_68K_PLT8O: | |
1632 | case R_68K_PLT16O: | |
1633 | case R_68K_PLT32O: | |
1634 | /* Relocation is the offset of the entry for this symbol in | |
1635 | the procedure linkage table. */ | |
1636 | BFD_ASSERT (h != NULL && h->plt.offset != (bfd_vma) -1); | |
1637 | ||
1638 | if (splt == NULL) | |
1639 | { | |
1640 | splt = bfd_get_section_by_name (dynobj, ".plt"); | |
1641 | BFD_ASSERT (splt != NULL); | |
1642 | } | |
1643 | ||
1644 | relocation = h->plt.offset; | |
1645 | ||
1646 | /* This relocation does not use the addend. */ | |
1647 | rel->r_addend = 0; | |
1648 | ||
1649 | break; | |
1650 | ||
1651 | case R_68K_PC8: | |
1652 | case R_68K_PC16: | |
1653 | case R_68K_PC32: | |
1654 | if (h == NULL) | |
1655 | break; | |
1656 | /* Fall through. */ | |
1657 | case R_68K_8: | |
1658 | case R_68K_16: | |
1659 | case R_68K_32: | |
1660 | if (info->shared | |
1661 | && (input_section->flags & SEC_ALLOC) != 0 | |
1662 | && ((r_type != R_68K_PC8 | |
1663 | && r_type != R_68K_PC16 | |
1664 | && r_type != R_68K_PC32) | |
1665 | || (!info->symbolic | |
1666 | || (h->elf_link_hash_flags | |
1667 | & ELF_LINK_HASH_DEF_REGULAR) == 0))) | |
1668 | { | |
1669 | Elf_Internal_Rela outrel; | |
1670 | boolean skip, relocate; | |
1671 | ||
1672 | /* When generating a shared object, these relocations | |
1673 | are copied into the output file to be resolved at run | |
1674 | time. */ | |
1675 | ||
1676 | if (sreloc == NULL) | |
1677 | { | |
1678 | const char *name; | |
1679 | ||
1680 | name = (bfd_elf_string_from_elf_section | |
1681 | (input_bfd, | |
1682 | elf_elfheader (input_bfd)->e_shstrndx, | |
1683 | elf_section_data (input_section)->rel_hdr.sh_name)); | |
1684 | if (name == NULL) | |
1685 | return false; | |
1686 | ||
1687 | BFD_ASSERT (strncmp (name, ".rela", 5) == 0 | |
1688 | && strcmp (bfd_get_section_name (input_bfd, | |
1689 | input_section), | |
1690 | name + 5) == 0); | |
1691 | ||
1692 | sreloc = bfd_get_section_by_name (dynobj, name); | |
1693 | BFD_ASSERT (sreloc != NULL); | |
1694 | } | |
1695 | ||
1696 | skip = false; | |
1697 | ||
1698 | if (elf_section_data (input_section)->stab_info == NULL) | |
1699 | outrel.r_offset = rel->r_offset; | |
1700 | else | |
1701 | { | |
1702 | bfd_vma off; | |
1703 | ||
1704 | off = (_bfd_stab_section_offset | |
1705 | (output_bfd, &elf_hash_table (info)->stab_info, | |
1706 | input_section, | |
1707 | &elf_section_data (input_section)->stab_info, | |
1708 | rel->r_offset)); | |
1709 | if (off == (bfd_vma) -1) | |
1710 | skip = true; | |
1711 | outrel.r_offset = off; | |
1712 | } | |
1713 | ||
1714 | outrel.r_offset += (input_section->output_section->vma | |
1715 | + input_section->output_offset); | |
1716 | ||
1717 | if (skip) | |
1718 | { | |
1719 | memset (&outrel, 0, sizeof outrel); | |
1720 | relocate = false; | |
1721 | } | |
1722 | /* h->dynindx may be -1 if the symbol was marked to | |
1723 | become local. */ | |
1724 | else if (h != NULL | |
1725 | && ((! info->symbolic && h->dynindx != -1) | |
1726 | || (h->elf_link_hash_flags | |
1727 | & ELF_LINK_HASH_DEF_REGULAR) == 0)) | |
1728 | { | |
1729 | BFD_ASSERT (h->dynindx != -1); | |
1730 | relocate = false; | |
1731 | outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); | |
1732 | outrel.r_addend = relocation + rel->r_addend; | |
1733 | } | |
1734 | else | |
1735 | { | |
1736 | if (r_type == R_68K_32) | |
1737 | { | |
1738 | relocate = true; | |
1739 | outrel.r_info = ELF32_R_INFO (0, R_68K_RELATIVE); | |
1740 | outrel.r_addend = relocation + rel->r_addend; | |
1741 | } | |
1742 | else | |
1743 | { | |
1744 | long indx; | |
1745 | ||
1746 | if (h == NULL) | |
1747 | sec = local_sections[r_symndx]; | |
1748 | else | |
1749 | { | |
1750 | BFD_ASSERT (h->root.type == bfd_link_hash_defined | |
1751 | || (h->root.type | |
1752 | == bfd_link_hash_defweak)); | |
1753 | sec = h->root.u.def.section; | |
1754 | } | |
1755 | if (sec != NULL && bfd_is_abs_section (sec)) | |
1756 | indx = 0; | |
1757 | else if (sec == NULL || sec->owner == NULL) | |
1758 | { | |
1759 | bfd_set_error (bfd_error_bad_value); | |
1760 | return false; | |
1761 | } | |
1762 | else | |
1763 | { | |
1764 | asection *osec; | |
1765 | ||
1766 | osec = sec->output_section; | |
1767 | indx = elf_section_data (osec)->dynindx; | |
1768 | BFD_ASSERT (indx > 0); | |
1769 | } | |
1770 | ||
1771 | relocate = false; | |
1772 | outrel.r_info = ELF32_R_INFO (indx, r_type); | |
1773 | outrel.r_addend = relocation + rel->r_addend; | |
1774 | } | |
1775 | } | |
1776 | ||
1777 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, | |
1778 | (((Elf32_External_Rela *) | |
1779 | sreloc->contents) | |
1780 | + sreloc->reloc_count)); | |
1781 | ++sreloc->reloc_count; | |
1782 | ||
1783 | /* This reloc will be computed at runtime, so there's no | |
1784 | need to do anything now, except for R_68K_32 | |
1785 | relocations that have been turned into | |
1786 | R_68K_RELATIVE. */ | |
1787 | if (!relocate) | |
1788 | continue; | |
1789 | } | |
1790 | ||
1791 | break; | |
1792 | ||
1793 | case R_68K_GNU_VTINHERIT: | |
1794 | case R_68K_GNU_VTENTRY: | |
1795 | /* These are no-ops in the end. */ | |
1796 | continue; | |
1797 | ||
1798 | default: | |
1799 | break; | |
1800 | } | |
1801 | ||
1802 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, | |
1803 | contents, rel->r_offset, | |
1804 | relocation, rel->r_addend); | |
1805 | ||
1806 | if (r != bfd_reloc_ok) | |
1807 | { | |
1808 | switch (r) | |
1809 | { | |
1810 | default: | |
1811 | case bfd_reloc_outofrange: | |
1812 | abort (); | |
1813 | case bfd_reloc_overflow: | |
1814 | { | |
1815 | const char *name; | |
1816 | ||
1817 | if (h != NULL) | |
1818 | name = h->root.root.string; | |
1819 | else | |
1820 | { | |
1821 | name = bfd_elf_string_from_elf_section (input_bfd, | |
1822 | symtab_hdr->sh_link, | |
1823 | sym->st_name); | |
1824 | if (name == NULL) | |
1825 | return false; | |
1826 | if (*name == '\0') | |
1827 | name = bfd_section_name (input_bfd, sec); | |
1828 | } | |
1829 | if (!(info->callbacks->reloc_overflow | |
1830 | (info, name, howto->name, (bfd_vma) 0, | |
1831 | input_bfd, input_section, rel->r_offset))) | |
1832 | return false; | |
1833 | } | |
1834 | break; | |
1835 | } | |
1836 | } | |
1837 | } | |
1838 | ||
1839 | return true; | |
1840 | } | |
1841 | ||
1842 | /* Finish up dynamic symbol handling. We set the contents of various | |
1843 | dynamic sections here. */ | |
1844 | ||
1845 | static boolean | |
1846 | elf_m68k_finish_dynamic_symbol (output_bfd, info, h, sym) | |
1847 | bfd *output_bfd; | |
1848 | struct bfd_link_info *info; | |
1849 | struct elf_link_hash_entry *h; | |
1850 | Elf_Internal_Sym *sym; | |
1851 | { | |
1852 | bfd *dynobj; | |
9e1281c7 | 1853 | int plt_off1, plt_off2, plt_off3; |
252b5132 RH |
1854 | |
1855 | dynobj = elf_hash_table (info)->dynobj; | |
1856 | ||
1857 | if (h->plt.offset != (bfd_vma) -1) | |
1858 | { | |
1859 | asection *splt; | |
1860 | asection *sgot; | |
1861 | asection *srela; | |
1862 | bfd_vma plt_index; | |
1863 | bfd_vma got_offset; | |
1864 | Elf_Internal_Rela rela; | |
1865 | ||
1866 | /* This symbol has an entry in the procedure linkage table. Set | |
1867 | it up. */ | |
1868 | ||
1869 | BFD_ASSERT (h->dynindx != -1); | |
1870 | ||
1871 | splt = bfd_get_section_by_name (dynobj, ".plt"); | |
1872 | sgot = bfd_get_section_by_name (dynobj, ".got.plt"); | |
1873 | srela = bfd_get_section_by_name (dynobj, ".rela.plt"); | |
1874 | BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL); | |
1875 | ||
1876 | /* Get the index in the procedure linkage table which | |
1877 | corresponds to this symbol. This is the index of this symbol | |
1878 | in all the symbols for which we are making plt entries. The | |
1879 | first entry in the procedure linkage table is reserved. */ | |
9e1281c7 CM |
1880 | if ( CPU32_FLAG (output_bfd)) |
1881 | plt_index = h->plt.offset / PLT_CPU32_ENTRY_SIZE - 1; | |
1882 | else | |
1883 | plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1; | |
252b5132 RH |
1884 | |
1885 | /* Get the offset into the .got table of the entry that | |
1886 | corresponds to this function. Each .got entry is 4 bytes. | |
1887 | The first three are reserved. */ | |
1888 | got_offset = (plt_index + 3) * 4; | |
1889 | ||
9e1281c7 CM |
1890 | if ( CPU32_FLAG (output_bfd)) |
1891 | { | |
1892 | /* Fill in the entry in the procedure linkage table. */ | |
1893 | memcpy (splt->contents + h->plt.offset, elf_cpu32_plt_entry, | |
1894 | PLT_CPU32_ENTRY_SIZE); | |
1895 | plt_off1 = 4; | |
1896 | plt_off2 = 12; | |
1897 | plt_off3 = 18; | |
1898 | } | |
1899 | else | |
1900 | { | |
1901 | /* Fill in the entry in the procedure linkage table. */ | |
1902 | memcpy (splt->contents + h->plt.offset, elf_m68k_plt_entry, | |
1903 | PLT_ENTRY_SIZE); | |
1904 | plt_off1 = 4; | |
1905 | plt_off2 = 10; | |
1906 | plt_off3 = 16; | |
1907 | } | |
1908 | ||
252b5132 RH |
1909 | /* The offset is relative to the first extension word. */ |
1910 | bfd_put_32 (output_bfd, | |
1911 | (sgot->output_section->vma | |
1912 | + sgot->output_offset | |
1913 | + got_offset | |
1914 | - (splt->output_section->vma | |
1915 | + h->plt.offset + 2)), | |
9e1281c7 | 1916 | splt->contents + h->plt.offset + plt_off1); |
252b5132 RH |
1917 | |
1918 | bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela), | |
9e1281c7 CM |
1919 | splt->contents + h->plt.offset + plt_off2); |
1920 | bfd_put_32 (output_bfd, - (h->plt.offset + plt_off3), | |
1921 | splt->contents + h->plt.offset + plt_off3); | |
252b5132 RH |
1922 | |
1923 | /* Fill in the entry in the global offset table. */ | |
1924 | bfd_put_32 (output_bfd, | |
1925 | (splt->output_section->vma | |
1926 | + splt->output_offset | |
1927 | + h->plt.offset | |
1928 | + 8), | |
1929 | sgot->contents + got_offset); | |
1930 | ||
1931 | /* Fill in the entry in the .rela.plt section. */ | |
1932 | rela.r_offset = (sgot->output_section->vma | |
1933 | + sgot->output_offset | |
1934 | + got_offset); | |
1935 | rela.r_info = ELF32_R_INFO (h->dynindx, R_68K_JMP_SLOT); | |
1936 | rela.r_addend = 0; | |
1937 | bfd_elf32_swap_reloca_out (output_bfd, &rela, | |
1938 | ((Elf32_External_Rela *) srela->contents | |
1939 | + plt_index)); | |
1940 | ||
1941 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
1942 | { | |
1943 | /* Mark the symbol as undefined, rather than as defined in | |
1944 | the .plt section. Leave the value alone. */ | |
1945 | sym->st_shndx = SHN_UNDEF; | |
1946 | } | |
1947 | } | |
1948 | ||
1949 | if (h->got.offset != (bfd_vma) -1) | |
1950 | { | |
1951 | asection *sgot; | |
1952 | asection *srela; | |
1953 | Elf_Internal_Rela rela; | |
1954 | ||
1955 | /* This symbol has an entry in the global offset table. Set it | |
1956 | up. */ | |
1957 | ||
1958 | sgot = bfd_get_section_by_name (dynobj, ".got"); | |
1959 | srela = bfd_get_section_by_name (dynobj, ".rela.got"); | |
1960 | BFD_ASSERT (sgot != NULL && srela != NULL); | |
1961 | ||
1962 | rela.r_offset = (sgot->output_section->vma | |
1963 | + sgot->output_offset | |
1964 | + (h->got.offset &~ 1)); | |
1965 | ||
1966 | /* If this is a -Bsymbolic link, and the symbol is defined | |
1967 | locally, we just want to emit a RELATIVE reloc. Likewise if | |
1968 | the symbol was forced to be local because of a version file. | |
1969 | The entry in the global offset table will already have been | |
1970 | initialized in the relocate_section function. */ | |
1971 | if (info->shared | |
1972 | && (info->symbolic || h->dynindx == -1) | |
1973 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)) | |
1974 | { | |
1975 | rela.r_info = ELF32_R_INFO (0, R_68K_RELATIVE); | |
1976 | rela.r_addend = bfd_get_signed_32 (output_bfd, | |
1977 | (sgot->contents | |
1978 | + (h->got.offset & ~1))); | |
1979 | } | |
1980 | else | |
1981 | { | |
1982 | bfd_put_32 (output_bfd, (bfd_vma) 0, | |
1983 | sgot->contents + (h->got.offset & ~1)); | |
1984 | rela.r_info = ELF32_R_INFO (h->dynindx, R_68K_GLOB_DAT); | |
1985 | rela.r_addend = 0; | |
1986 | } | |
1987 | ||
1988 | bfd_elf32_swap_reloca_out (output_bfd, &rela, | |
1989 | ((Elf32_External_Rela *) srela->contents | |
1990 | + srela->reloc_count)); | |
1991 | ++srela->reloc_count; | |
1992 | } | |
1993 | ||
1994 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0) | |
1995 | { | |
1996 | asection *s; | |
1997 | Elf_Internal_Rela rela; | |
1998 | ||
1999 | /* This symbol needs a copy reloc. Set it up. */ | |
2000 | ||
2001 | BFD_ASSERT (h->dynindx != -1 | |
2002 | && (h->root.type == bfd_link_hash_defined | |
2003 | || h->root.type == bfd_link_hash_defweak)); | |
2004 | ||
2005 | s = bfd_get_section_by_name (h->root.u.def.section->owner, | |
2006 | ".rela.bss"); | |
2007 | BFD_ASSERT (s != NULL); | |
2008 | ||
2009 | rela.r_offset = (h->root.u.def.value | |
2010 | + h->root.u.def.section->output_section->vma | |
2011 | + h->root.u.def.section->output_offset); | |
2012 | rela.r_info = ELF32_R_INFO (h->dynindx, R_68K_COPY); | |
2013 | rela.r_addend = 0; | |
2014 | bfd_elf32_swap_reloca_out (output_bfd, &rela, | |
2015 | ((Elf32_External_Rela *) s->contents | |
2016 | + s->reloc_count)); | |
2017 | ++s->reloc_count; | |
2018 | } | |
2019 | ||
2020 | /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */ | |
2021 | if (strcmp (h->root.root.string, "_DYNAMIC") == 0 | |
2022 | || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) | |
2023 | sym->st_shndx = SHN_ABS; | |
2024 | ||
2025 | return true; | |
2026 | } | |
2027 | ||
2028 | /* Finish up the dynamic sections. */ | |
2029 | ||
2030 | static boolean | |
2031 | elf_m68k_finish_dynamic_sections (output_bfd, info) | |
2032 | bfd *output_bfd; | |
2033 | struct bfd_link_info *info; | |
2034 | { | |
2035 | bfd *dynobj; | |
2036 | asection *sgot; | |
2037 | asection *sdyn; | |
2038 | ||
2039 | dynobj = elf_hash_table (info)->dynobj; | |
2040 | ||
2041 | sgot = bfd_get_section_by_name (dynobj, ".got.plt"); | |
2042 | BFD_ASSERT (sgot != NULL); | |
2043 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); | |
2044 | ||
2045 | if (elf_hash_table (info)->dynamic_sections_created) | |
2046 | { | |
2047 | asection *splt; | |
2048 | Elf32_External_Dyn *dyncon, *dynconend; | |
2049 | ||
2050 | splt = bfd_get_section_by_name (dynobj, ".plt"); | |
2051 | BFD_ASSERT (splt != NULL && sdyn != NULL); | |
2052 | ||
2053 | dyncon = (Elf32_External_Dyn *) sdyn->contents; | |
2054 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size); | |
2055 | for (; dyncon < dynconend; dyncon++) | |
2056 | { | |
2057 | Elf_Internal_Dyn dyn; | |
2058 | const char *name; | |
2059 | asection *s; | |
2060 | ||
2061 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); | |
2062 | ||
2063 | switch (dyn.d_tag) | |
2064 | { | |
2065 | default: | |
2066 | break; | |
2067 | ||
2068 | case DT_PLTGOT: | |
2069 | name = ".got"; | |
2070 | goto get_vma; | |
2071 | case DT_JMPREL: | |
2072 | name = ".rela.plt"; | |
2073 | get_vma: | |
2074 | s = bfd_get_section_by_name (output_bfd, name); | |
2075 | BFD_ASSERT (s != NULL); | |
2076 | dyn.d_un.d_ptr = s->vma; | |
2077 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); | |
2078 | break; | |
2079 | ||
2080 | case DT_PLTRELSZ: | |
2081 | s = bfd_get_section_by_name (output_bfd, ".rela.plt"); | |
2082 | BFD_ASSERT (s != NULL); | |
2083 | if (s->_cooked_size != 0) | |
2084 | dyn.d_un.d_val = s->_cooked_size; | |
2085 | else | |
2086 | dyn.d_un.d_val = s->_raw_size; | |
2087 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); | |
2088 | break; | |
2089 | ||
2090 | case DT_RELASZ: | |
2091 | /* The procedure linkage table relocs (DT_JMPREL) should | |
2092 | not be included in the overall relocs (DT_RELA). | |
2093 | Therefore, we override the DT_RELASZ entry here to | |
2094 | make it not include the JMPREL relocs. Since the | |
2095 | linker script arranges for .rela.plt to follow all | |
2096 | other relocation sections, we don't have to worry | |
2097 | about changing the DT_RELA entry. */ | |
2098 | s = bfd_get_section_by_name (output_bfd, ".rela.plt"); | |
2099 | if (s != NULL) | |
2100 | { | |
2101 | if (s->_cooked_size != 0) | |
2102 | dyn.d_un.d_val -= s->_cooked_size; | |
2103 | else | |
2104 | dyn.d_un.d_val -= s->_raw_size; | |
2105 | } | |
2106 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); | |
2107 | break; | |
2108 | } | |
2109 | } | |
2110 | ||
2111 | /* Fill in the first entry in the procedure linkage table. */ | |
2112 | if (splt->_raw_size > 0) | |
2113 | { | |
9e1281c7 CM |
2114 | if (!CPU32_FLAG (output_bfd)) |
2115 | { | |
2116 | memcpy (splt->contents, elf_m68k_plt0_entry, PLT_ENTRY_SIZE); | |
2117 | bfd_put_32 (output_bfd, | |
2118 | (sgot->output_section->vma | |
2119 | + sgot->output_offset + 4 | |
2120 | - (splt->output_section->vma + 2)), | |
2121 | splt->contents + 4); | |
2122 | bfd_put_32 (output_bfd, | |
2123 | (sgot->output_section->vma | |
2124 | + sgot->output_offset + 8 | |
2125 | - (splt->output_section->vma + 10)), | |
2126 | splt->contents + 12); | |
c3668558 | 2127 | elf_section_data (splt->output_section)->this_hdr.sh_entsize |
9e1281c7 CM |
2128 | = PLT_ENTRY_SIZE; |
2129 | } | |
2130 | else /* cpu32 */ | |
2131 | { | |
2132 | memcpy (splt->contents, elf_cpu32_plt0_entry, PLT_CPU32_ENTRY_SIZE); | |
2133 | bfd_put_32 (output_bfd, | |
2134 | (sgot->output_section->vma | |
2135 | + sgot->output_offset + 4 | |
2136 | - (splt->output_section->vma + 2)), | |
2137 | splt->contents + 4); | |
2138 | bfd_put_32 (output_bfd, | |
2139 | (sgot->output_section->vma | |
2140 | + sgot->output_offset + 8 | |
2141 | - (splt->output_section->vma + 10)), | |
6091b433 | 2142 | splt->contents + 12); |
c3668558 | 2143 | elf_section_data (splt->output_section)->this_hdr.sh_entsize |
9e1281c7 CM |
2144 | = PLT_CPU32_ENTRY_SIZE; |
2145 | } | |
252b5132 | 2146 | } |
252b5132 RH |
2147 | } |
2148 | ||
2149 | /* Fill in the first three entries in the global offset table. */ | |
2150 | if (sgot->_raw_size > 0) | |
2151 | { | |
2152 | if (sdyn == NULL) | |
2153 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents); | |
2154 | else | |
2155 | bfd_put_32 (output_bfd, | |
2156 | sdyn->output_section->vma + sdyn->output_offset, | |
2157 | sgot->contents); | |
2158 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4); | |
2159 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8); | |
2160 | } | |
2161 | ||
2162 | elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4; | |
2163 | ||
252b5132 RH |
2164 | return true; |
2165 | } | |
2166 | ||
0752970e NC |
2167 | /* Given a .data section and a .emreloc in-memory section, store |
2168 | relocation information into the .emreloc section which can be | |
2169 | used at runtime to relocate the section. This is called by the | |
2170 | linker when the --embedded-relocs switch is used. This is called | |
2171 | after the add_symbols entry point has been called for all the | |
2172 | objects, and before the final_link entry point is called. */ | |
2173 | ||
2174 | boolean | |
2175 | bfd_m68k_elf32_create_embedded_relocs (abfd, info, datasec, relsec, errmsg) | |
2176 | bfd *abfd; | |
2177 | struct bfd_link_info *info; | |
2178 | asection *datasec; | |
2179 | asection *relsec; | |
2180 | char **errmsg; | |
2181 | { | |
2182 | Elf_Internal_Shdr *symtab_hdr; | |
2183 | Elf32_External_Sym *extsyms; | |
2184 | Elf32_External_Sym *free_extsyms = NULL; | |
2185 | Elf_Internal_Rela *internal_relocs; | |
2186 | Elf_Internal_Rela *free_relocs = NULL; | |
2187 | Elf_Internal_Rela *irel, *irelend; | |
2188 | bfd_byte *p; | |
2189 | ||
2190 | BFD_ASSERT (! info->relocateable); | |
2191 | ||
2192 | *errmsg = NULL; | |
2193 | ||
2194 | if (datasec->reloc_count == 0) | |
2195 | return true; | |
2196 | ||
2197 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
2198 | /* Read this BFD's symbols if we haven't done so already, or get the cached | |
2199 | copy if it exists. */ | |
2200 | if (symtab_hdr->contents != NULL) | |
2201 | extsyms = (Elf32_External_Sym *) symtab_hdr->contents; | |
2202 | else | |
2203 | { | |
2204 | /* Go get them off disk. */ | |
2205 | if (info->keep_memory) | |
2206 | extsyms = ((Elf32_External_Sym *) | |
2207 | bfd_alloc (abfd, symtab_hdr->sh_size)); | |
2208 | else | |
2209 | extsyms = ((Elf32_External_Sym *) | |
2210 | bfd_malloc (symtab_hdr->sh_size)); | |
2211 | if (extsyms == NULL) | |
2212 | goto error_return; | |
2213 | if (! info->keep_memory) | |
2214 | free_extsyms = extsyms; | |
2215 | if (bfd_seek (abfd, symtab_hdr->sh_offset, SEEK_SET) != 0 | |
2216 | || (bfd_read (extsyms, 1, symtab_hdr->sh_size, abfd) | |
2217 | != symtab_hdr->sh_size)) | |
2218 | goto error_return; | |
2219 | if (info->keep_memory) | |
2220 | symtab_hdr->contents = extsyms; | |
2221 | } | |
2222 | ||
2223 | /* Get a copy of the native relocations. */ | |
2224 | internal_relocs = (_bfd_elf32_link_read_relocs | |
2225 | (abfd, datasec, (PTR) NULL, (Elf_Internal_Rela *) NULL, | |
2226 | info->keep_memory)); | |
2227 | if (internal_relocs == NULL) | |
2228 | goto error_return; | |
2229 | if (! info->keep_memory) | |
2230 | free_relocs = internal_relocs; | |
2231 | ||
2232 | relsec->contents = (bfd_byte *) bfd_alloc (abfd, datasec->reloc_count * 12); | |
2233 | if (relsec->contents == NULL) | |
2234 | goto error_return; | |
2235 | ||
2236 | p = relsec->contents; | |
2237 | ||
2238 | irelend = internal_relocs + datasec->reloc_count; | |
2239 | for (irel = internal_relocs; irel < irelend; irel++, p += 12) | |
2240 | { | |
2241 | asection *targetsec; | |
2242 | ||
2243 | /* We are going to write a four byte longword into the runtime | |
2244 | reloc section. The longword will be the address in the data | |
2245 | section which must be relocated. It is followed by the name | |
2246 | of the target section NUL-padded or truncated to 8 | |
2247 | characters. */ | |
2248 | ||
2249 | /* We can only relocate absolute longword relocs at run time. */ | |
2250 | if (ELF32_R_TYPE (irel->r_info) != (int) R_68K_32) | |
2251 | { | |
2252 | *errmsg = _("unsupported reloc type"); | |
2253 | bfd_set_error (bfd_error_bad_value); | |
2254 | goto error_return; | |
2255 | } | |
2256 | ||
2257 | /* Get the target section referred to by the reloc. */ | |
2258 | if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info) | |
2259 | { | |
2260 | Elf_Internal_Sym isym; | |
2261 | ||
2262 | /* A local symbol. */ | |
2263 | bfd_elf32_swap_symbol_in (abfd, | |
2264 | extsyms + ELF32_R_SYM (irel->r_info), | |
2265 | &isym); | |
2266 | ||
2267 | targetsec = bfd_section_from_elf_index (abfd, isym.st_shndx); | |
2268 | } | |
2269 | else | |
2270 | { | |
2271 | unsigned long indx; | |
2272 | struct elf_link_hash_entry *h; | |
2273 | ||
2274 | /* An external symbol. */ | |
2275 | indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info; | |
2276 | h = elf_sym_hashes (abfd)[indx]; | |
2277 | BFD_ASSERT (h != NULL); | |
2278 | if (h->root.type == bfd_link_hash_defined | |
2279 | || h->root.type == bfd_link_hash_defweak) | |
2280 | targetsec = h->root.u.def.section; | |
2281 | else | |
2282 | targetsec = NULL; | |
2283 | } | |
2284 | ||
2285 | bfd_put_32 (abfd, irel->r_offset + datasec->output_offset, p); | |
2286 | memset (p + 4, 0, 8); | |
2287 | if (targetsec != NULL) | |
2288 | strncpy (p + 4, targetsec->output_section->name, 8); | |
2289 | } | |
c3668558 | 2290 | |
0752970e NC |
2291 | if (free_extsyms != NULL) |
2292 | free (free_extsyms); | |
2293 | if (free_relocs != NULL) | |
2294 | free (free_relocs); | |
2295 | return true; | |
2296 | ||
2297 | error_return: | |
2298 | if (free_extsyms != NULL) | |
2299 | free (free_extsyms); | |
2300 | if (free_relocs != NULL) | |
2301 | free (free_relocs); | |
2302 | return false; | |
2303 | } | |
2304 | ||
aa91b392 AS |
2305 | static enum elf_reloc_type_class |
2306 | elf32_m68k_reloc_type_class (type) | |
2307 | int type; | |
2308 | { | |
2309 | switch (type) | |
2310 | { | |
2311 | case R_68K_RELATIVE: | |
2312 | return reloc_class_relative; | |
2313 | case R_68K_JMP_SLOT: | |
2314 | return reloc_class_plt; | |
2315 | case R_68K_COPY: | |
2316 | return reloc_class_copy; | |
2317 | default: | |
2318 | return reloc_class_normal; | |
2319 | } | |
2320 | } | |
2321 | ||
252b5132 RH |
2322 | #define TARGET_BIG_SYM bfd_elf32_m68k_vec |
2323 | #define TARGET_BIG_NAME "elf32-m68k" | |
2324 | #define ELF_MACHINE_CODE EM_68K | |
2325 | #define ELF_MAXPAGESIZE 0x2000 | |
2326 | #define elf_backend_create_dynamic_sections \ | |
2327 | _bfd_elf_create_dynamic_sections | |
2328 | #define bfd_elf32_bfd_link_hash_table_create \ | |
2329 | elf_m68k_link_hash_table_create | |
2330 | #define bfd_elf32_bfd_final_link _bfd_elf32_gc_common_final_link | |
2331 | ||
2332 | #define elf_backend_check_relocs elf_m68k_check_relocs | |
2333 | #define elf_backend_adjust_dynamic_symbol \ | |
2334 | elf_m68k_adjust_dynamic_symbol | |
2335 | #define elf_backend_size_dynamic_sections \ | |
2336 | elf_m68k_size_dynamic_sections | |
2337 | #define elf_backend_relocate_section elf_m68k_relocate_section | |
2338 | #define elf_backend_finish_dynamic_symbol \ | |
2339 | elf_m68k_finish_dynamic_symbol | |
2340 | #define elf_backend_finish_dynamic_sections \ | |
2341 | elf_m68k_finish_dynamic_sections | |
2342 | #define elf_backend_gc_mark_hook elf_m68k_gc_mark_hook | |
2343 | #define elf_backend_gc_sweep_hook elf_m68k_gc_sweep_hook | |
9e1281c7 CM |
2344 | #define bfd_elf32_bfd_copy_private_bfd_data \ |
2345 | elf32_m68k_copy_private_bfd_data | |
2346 | #define bfd_elf32_bfd_merge_private_bfd_data \ | |
2347 | elf32_m68k_merge_private_bfd_data | |
2348 | #define bfd_elf32_bfd_set_private_flags \ | |
2349 | elf32_m68k_set_private_flags | |
2350 | #define bfd_elf32_bfd_print_private_bfd_data \ | |
2351 | elf32_m68k_print_private_bfd_data | |
aa91b392 | 2352 | #define elf_backend_reloc_type_class elf32_m68k_reloc_type_class |
9e1281c7 | 2353 | |
252b5132 RH |
2354 | #define elf_backend_can_gc_sections 1 |
2355 | #define elf_backend_want_got_plt 1 | |
2356 | #define elf_backend_plt_readonly 1 | |
2357 | #define elf_backend_want_plt_sym 0 | |
2358 | #define elf_backend_got_header_size 12 | |
252b5132 RH |
2359 | |
2360 | #include "elf32-target.h" |