Commit | Line | Data |
---|---|---|
252b5132 | 1 | /* Motorola 68k series support for 32-bit ELF |
b2a8e766 | 2 | Copyright 1993, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, |
cf869cce | 3 | 2004, 2005, 2006, 2007, 2008, 2009 Free Software Foundation, Inc. |
252b5132 | 4 | |
ae9a127f | 5 | This file is part of BFD, the Binary File Descriptor library. |
252b5132 | 6 | |
ae9a127f NC |
7 | This program is free software; you can redistribute it and/or modify |
8 | it under the terms of the GNU General Public License as published by | |
cd123cb7 | 9 | the Free Software Foundation; either version 3 of the License, or |
ae9a127f | 10 | (at your option) any later version. |
252b5132 | 11 | |
ae9a127f NC |
12 | This program is distributed in the hope that it will be useful, |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
252b5132 | 16 | |
ae9a127f NC |
17 | You should have received a copy of the GNU General Public License |
18 | along with this program; if not, write to the Free Software | |
cd123cb7 NC |
19 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
20 | MA 02110-1301, USA. */ | |
252b5132 | 21 | |
252b5132 | 22 | #include "sysdep.h" |
3db64b00 | 23 | #include "bfd.h" |
252b5132 RH |
24 | #include "bfdlink.h" |
25 | #include "libbfd.h" | |
26 | #include "elf-bfd.h" | |
27 | #include "elf/m68k.h" | |
266abb8f | 28 | #include "opcode/m68k.h" |
252b5132 RH |
29 | |
30 | static reloc_howto_type *reloc_type_lookup | |
31 | PARAMS ((bfd *, bfd_reloc_code_real_type)); | |
32 | static void rtype_to_howto | |
947216bf | 33 | PARAMS ((bfd *, arelent *, Elf_Internal_Rela *)); |
252b5132 RH |
34 | static struct bfd_hash_entry *elf_m68k_link_hash_newfunc |
35 | PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *)); | |
36 | static struct bfd_link_hash_table *elf_m68k_link_hash_table_create | |
37 | PARAMS ((bfd *)); | |
b34976b6 | 38 | static bfd_boolean elf_m68k_check_relocs |
252b5132 RH |
39 | PARAMS ((bfd *, struct bfd_link_info *, asection *, |
40 | const Elf_Internal_Rela *)); | |
b34976b6 | 41 | static bfd_boolean elf_m68k_adjust_dynamic_symbol |
252b5132 | 42 | PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *)); |
b34976b6 | 43 | static bfd_boolean elf_m68k_size_dynamic_sections |
252b5132 | 44 | PARAMS ((bfd *, struct bfd_link_info *)); |
0cca5f05 AS |
45 | static bfd_boolean elf_m68k_discard_copies |
46 | PARAMS ((struct elf_link_hash_entry *, PTR)); | |
b34976b6 | 47 | static bfd_boolean elf_m68k_relocate_section |
252b5132 RH |
48 | PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, |
49 | Elf_Internal_Rela *, Elf_Internal_Sym *, asection **)); | |
b34976b6 | 50 | static bfd_boolean elf_m68k_finish_dynamic_symbol |
252b5132 RH |
51 | PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *, |
52 | Elf_Internal_Sym *)); | |
b34976b6 | 53 | static bfd_boolean elf_m68k_finish_dynamic_sections |
252b5132 RH |
54 | PARAMS ((bfd *, struct bfd_link_info *)); |
55 | ||
b34976b6 | 56 | static bfd_boolean elf32_m68k_set_private_flags |
9e1281c7 | 57 | PARAMS ((bfd *, flagword)); |
b34976b6 | 58 | static bfd_boolean elf32_m68k_merge_private_bfd_data |
9e1281c7 | 59 | PARAMS ((bfd *, bfd *)); |
b34976b6 | 60 | static bfd_boolean elf32_m68k_print_private_bfd_data |
9e1281c7 | 61 | PARAMS ((bfd *, PTR)); |
aa91b392 | 62 | static enum elf_reloc_type_class elf32_m68k_reloc_type_class |
f51e552e | 63 | PARAMS ((const Elf_Internal_Rela *)); |
9e1281c7 | 64 | |
252b5132 | 65 | static reloc_howto_type howto_table[] = { |
b34976b6 AM |
66 | HOWTO(R_68K_NONE, 0, 0, 0, FALSE,0, complain_overflow_dont, bfd_elf_generic_reloc, "R_68K_NONE", FALSE, 0, 0x00000000,FALSE), |
67 | HOWTO(R_68K_32, 0, 2,32, FALSE,0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_32", FALSE, 0, 0xffffffff,FALSE), | |
68 | HOWTO(R_68K_16, 0, 1,16, FALSE,0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_16", FALSE, 0, 0x0000ffff,FALSE), | |
69 | HOWTO(R_68K_8, 0, 0, 8, FALSE,0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_8", FALSE, 0, 0x000000ff,FALSE), | |
70 | HOWTO(R_68K_PC32, 0, 2,32, TRUE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_PC32", FALSE, 0, 0xffffffff,TRUE), | |
71 | HOWTO(R_68K_PC16, 0, 1,16, TRUE, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_PC16", FALSE, 0, 0x0000ffff,TRUE), | |
72 | HOWTO(R_68K_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_PC8", FALSE, 0, 0x000000ff,TRUE), | |
73 | HOWTO(R_68K_GOT32, 0, 2,32, TRUE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_GOT32", FALSE, 0, 0xffffffff,TRUE), | |
74 | HOWTO(R_68K_GOT16, 0, 1,16, TRUE, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_GOT16", FALSE, 0, 0x0000ffff,TRUE), | |
75 | HOWTO(R_68K_GOT8, 0, 0, 8, TRUE, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_GOT8", FALSE, 0, 0x000000ff,TRUE), | |
76 | HOWTO(R_68K_GOT32O, 0, 2,32, FALSE,0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_GOT32O", FALSE, 0, 0xffffffff,FALSE), | |
77 | HOWTO(R_68K_GOT16O, 0, 1,16, FALSE,0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_GOT16O", FALSE, 0, 0x0000ffff,FALSE), | |
78 | HOWTO(R_68K_GOT8O, 0, 0, 8, FALSE,0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_GOT8O", FALSE, 0, 0x000000ff,FALSE), | |
79 | HOWTO(R_68K_PLT32, 0, 2,32, TRUE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_PLT32", FALSE, 0, 0xffffffff,TRUE), | |
80 | HOWTO(R_68K_PLT16, 0, 1,16, TRUE, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_PLT16", FALSE, 0, 0x0000ffff,TRUE), | |
81 | HOWTO(R_68K_PLT8, 0, 0, 8, TRUE, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_PLT8", FALSE, 0, 0x000000ff,TRUE), | |
82 | HOWTO(R_68K_PLT32O, 0, 2,32, FALSE,0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_PLT32O", FALSE, 0, 0xffffffff,FALSE), | |
83 | HOWTO(R_68K_PLT16O, 0, 1,16, FALSE,0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_PLT16O", FALSE, 0, 0x0000ffff,FALSE), | |
84 | HOWTO(R_68K_PLT8O, 0, 0, 8, FALSE,0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_PLT8O", FALSE, 0, 0x000000ff,FALSE), | |
85 | HOWTO(R_68K_COPY, 0, 0, 0, FALSE,0, complain_overflow_dont, bfd_elf_generic_reloc, "R_68K_COPY", FALSE, 0, 0xffffffff,FALSE), | |
86 | HOWTO(R_68K_GLOB_DAT, 0, 2,32, FALSE,0, complain_overflow_dont, bfd_elf_generic_reloc, "R_68K_GLOB_DAT", FALSE, 0, 0xffffffff,FALSE), | |
87 | HOWTO(R_68K_JMP_SLOT, 0, 2,32, FALSE,0, complain_overflow_dont, bfd_elf_generic_reloc, "R_68K_JMP_SLOT", FALSE, 0, 0xffffffff,FALSE), | |
88 | HOWTO(R_68K_RELATIVE, 0, 2,32, FALSE,0, complain_overflow_dont, bfd_elf_generic_reloc, "R_68K_RELATIVE", FALSE, 0, 0xffffffff,FALSE), | |
ae9a127f | 89 | /* GNU extension to record C++ vtable hierarchy. */ |
252b5132 RH |
90 | HOWTO (R_68K_GNU_VTINHERIT, /* type */ |
91 | 0, /* rightshift */ | |
92 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
93 | 0, /* bitsize */ | |
b34976b6 | 94 | FALSE, /* pc_relative */ |
252b5132 RH |
95 | 0, /* bitpos */ |
96 | complain_overflow_dont, /* complain_on_overflow */ | |
97 | NULL, /* special_function */ | |
98 | "R_68K_GNU_VTINHERIT", /* name */ | |
b34976b6 | 99 | FALSE, /* partial_inplace */ |
252b5132 RH |
100 | 0, /* src_mask */ |
101 | 0, /* dst_mask */ | |
b34976b6 | 102 | FALSE), |
ae9a127f | 103 | /* GNU extension to record C++ vtable member usage. */ |
252b5132 RH |
104 | HOWTO (R_68K_GNU_VTENTRY, /* type */ |
105 | 0, /* rightshift */ | |
106 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
107 | 0, /* bitsize */ | |
b34976b6 | 108 | FALSE, /* pc_relative */ |
252b5132 RH |
109 | 0, /* bitpos */ |
110 | complain_overflow_dont, /* complain_on_overflow */ | |
111 | _bfd_elf_rel_vtable_reloc_fn, /* special_function */ | |
112 | "R_68K_GNU_VTENTRY", /* name */ | |
b34976b6 | 113 | FALSE, /* partial_inplace */ |
252b5132 RH |
114 | 0, /* src_mask */ |
115 | 0, /* dst_mask */ | |
b34976b6 | 116 | FALSE), |
cf869cce NC |
117 | |
118 | /* TLS general dynamic variable reference. */ | |
119 | HOWTO (R_68K_TLS_GD32, /* type */ | |
120 | 0, /* rightshift */ | |
121 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
122 | 32, /* bitsize */ | |
123 | FALSE, /* pc_relative */ | |
124 | 0, /* bitpos */ | |
125 | complain_overflow_bitfield, /* complain_on_overflow */ | |
126 | bfd_elf_generic_reloc, /* special_function */ | |
127 | "R_68K_TLS_GD32", /* name */ | |
128 | FALSE, /* partial_inplace */ | |
129 | 0, /* src_mask */ | |
130 | 0xffffffff, /* dst_mask */ | |
131 | FALSE), /* pcrel_offset */ | |
132 | ||
133 | HOWTO (R_68K_TLS_GD16, /* type */ | |
134 | 0, /* rightshift */ | |
135 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
136 | 16, /* bitsize */ | |
137 | FALSE, /* pc_relative */ | |
138 | 0, /* bitpos */ | |
139 | complain_overflow_signed, /* complain_on_overflow */ | |
140 | bfd_elf_generic_reloc, /* special_function */ | |
141 | "R_68K_TLS_GD16", /* name */ | |
142 | FALSE, /* partial_inplace */ | |
143 | 0, /* src_mask */ | |
144 | 0x0000ffff, /* dst_mask */ | |
145 | FALSE), /* pcrel_offset */ | |
146 | ||
147 | HOWTO (R_68K_TLS_GD8, /* type */ | |
148 | 0, /* rightshift */ | |
149 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
150 | 8, /* bitsize */ | |
151 | FALSE, /* pc_relative */ | |
152 | 0, /* bitpos */ | |
153 | complain_overflow_signed, /* complain_on_overflow */ | |
154 | bfd_elf_generic_reloc, /* special_function */ | |
155 | "R_68K_TLS_GD8", /* name */ | |
156 | FALSE, /* partial_inplace */ | |
157 | 0, /* src_mask */ | |
158 | 0x000000ff, /* dst_mask */ | |
159 | FALSE), /* pcrel_offset */ | |
160 | ||
161 | /* TLS local dynamic variable reference. */ | |
162 | HOWTO (R_68K_TLS_LDM32, /* type */ | |
163 | 0, /* rightshift */ | |
164 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
165 | 32, /* bitsize */ | |
166 | FALSE, /* pc_relative */ | |
167 | 0, /* bitpos */ | |
168 | complain_overflow_bitfield, /* complain_on_overflow */ | |
169 | bfd_elf_generic_reloc, /* special_function */ | |
170 | "R_68K_TLS_LDM32", /* name */ | |
171 | FALSE, /* partial_inplace */ | |
172 | 0, /* src_mask */ | |
173 | 0xffffffff, /* dst_mask */ | |
174 | FALSE), /* pcrel_offset */ | |
175 | ||
176 | HOWTO (R_68K_TLS_LDM16, /* type */ | |
177 | 0, /* rightshift */ | |
178 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
179 | 16, /* bitsize */ | |
180 | FALSE, /* pc_relative */ | |
181 | 0, /* bitpos */ | |
182 | complain_overflow_signed, /* complain_on_overflow */ | |
183 | bfd_elf_generic_reloc, /* special_function */ | |
184 | "R_68K_TLS_LDM16", /* name */ | |
185 | FALSE, /* partial_inplace */ | |
186 | 0, /* src_mask */ | |
187 | 0x0000ffff, /* dst_mask */ | |
188 | FALSE), /* pcrel_offset */ | |
189 | ||
190 | HOWTO (R_68K_TLS_LDM8, /* type */ | |
191 | 0, /* rightshift */ | |
192 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
193 | 8, /* bitsize */ | |
194 | FALSE, /* pc_relative */ | |
195 | 0, /* bitpos */ | |
196 | complain_overflow_signed, /* complain_on_overflow */ | |
197 | bfd_elf_generic_reloc, /* special_function */ | |
198 | "R_68K_TLS_LDM8", /* name */ | |
199 | FALSE, /* partial_inplace */ | |
200 | 0, /* src_mask */ | |
201 | 0x000000ff, /* dst_mask */ | |
202 | FALSE), /* pcrel_offset */ | |
203 | ||
204 | HOWTO (R_68K_TLS_LDO32, /* type */ | |
205 | 0, /* rightshift */ | |
206 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
207 | 32, /* bitsize */ | |
208 | FALSE, /* pc_relative */ | |
209 | 0, /* bitpos */ | |
210 | complain_overflow_bitfield, /* complain_on_overflow */ | |
211 | bfd_elf_generic_reloc, /* special_function */ | |
212 | "R_68K_TLS_LDO32", /* name */ | |
213 | FALSE, /* partial_inplace */ | |
214 | 0, /* src_mask */ | |
215 | 0xffffffff, /* dst_mask */ | |
216 | FALSE), /* pcrel_offset */ | |
217 | ||
218 | HOWTO (R_68K_TLS_LDO16, /* type */ | |
219 | 0, /* rightshift */ | |
220 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
221 | 16, /* bitsize */ | |
222 | FALSE, /* pc_relative */ | |
223 | 0, /* bitpos */ | |
224 | complain_overflow_signed, /* complain_on_overflow */ | |
225 | bfd_elf_generic_reloc, /* special_function */ | |
226 | "R_68K_TLS_LDO16", /* name */ | |
227 | FALSE, /* partial_inplace */ | |
228 | 0, /* src_mask */ | |
229 | 0x0000ffff, /* dst_mask */ | |
230 | FALSE), /* pcrel_offset */ | |
231 | ||
232 | HOWTO (R_68K_TLS_LDO8, /* type */ | |
233 | 0, /* rightshift */ | |
234 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
235 | 8, /* bitsize */ | |
236 | FALSE, /* pc_relative */ | |
237 | 0, /* bitpos */ | |
238 | complain_overflow_signed, /* complain_on_overflow */ | |
239 | bfd_elf_generic_reloc, /* special_function */ | |
240 | "R_68K_TLS_LDO8", /* name */ | |
241 | FALSE, /* partial_inplace */ | |
242 | 0, /* src_mask */ | |
243 | 0x000000ff, /* dst_mask */ | |
244 | FALSE), /* pcrel_offset */ | |
245 | ||
246 | /* TLS initial execution variable reference. */ | |
247 | HOWTO (R_68K_TLS_IE32, /* type */ | |
248 | 0, /* rightshift */ | |
249 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
250 | 32, /* bitsize */ | |
251 | FALSE, /* pc_relative */ | |
252 | 0, /* bitpos */ | |
253 | complain_overflow_bitfield, /* complain_on_overflow */ | |
254 | bfd_elf_generic_reloc, /* special_function */ | |
255 | "R_68K_TLS_IE32", /* name */ | |
256 | FALSE, /* partial_inplace */ | |
257 | 0, /* src_mask */ | |
258 | 0xffffffff, /* dst_mask */ | |
259 | FALSE), /* pcrel_offset */ | |
260 | ||
261 | HOWTO (R_68K_TLS_IE16, /* type */ | |
262 | 0, /* rightshift */ | |
263 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
264 | 16, /* bitsize */ | |
265 | FALSE, /* pc_relative */ | |
266 | 0, /* bitpos */ | |
267 | complain_overflow_signed, /* complain_on_overflow */ | |
268 | bfd_elf_generic_reloc, /* special_function */ | |
269 | "R_68K_TLS_IE16", /* name */ | |
270 | FALSE, /* partial_inplace */ | |
271 | 0, /* src_mask */ | |
272 | 0x0000ffff, /* dst_mask */ | |
273 | FALSE), /* pcrel_offset */ | |
274 | ||
275 | HOWTO (R_68K_TLS_IE8, /* type */ | |
276 | 0, /* rightshift */ | |
277 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
278 | 8, /* bitsize */ | |
279 | FALSE, /* pc_relative */ | |
280 | 0, /* bitpos */ | |
281 | complain_overflow_signed, /* complain_on_overflow */ | |
282 | bfd_elf_generic_reloc, /* special_function */ | |
283 | "R_68K_TLS_IE8", /* name */ | |
284 | FALSE, /* partial_inplace */ | |
285 | 0, /* src_mask */ | |
286 | 0x000000ff, /* dst_mask */ | |
287 | FALSE), /* pcrel_offset */ | |
288 | ||
289 | /* TLS local execution variable reference. */ | |
290 | HOWTO (R_68K_TLS_LE32, /* type */ | |
291 | 0, /* rightshift */ | |
292 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
293 | 32, /* bitsize */ | |
294 | FALSE, /* pc_relative */ | |
295 | 0, /* bitpos */ | |
296 | complain_overflow_bitfield, /* complain_on_overflow */ | |
297 | bfd_elf_generic_reloc, /* special_function */ | |
298 | "R_68K_TLS_LE32", /* name */ | |
299 | FALSE, /* partial_inplace */ | |
300 | 0, /* src_mask */ | |
301 | 0xffffffff, /* dst_mask */ | |
302 | FALSE), /* pcrel_offset */ | |
303 | ||
304 | HOWTO (R_68K_TLS_LE16, /* type */ | |
305 | 0, /* rightshift */ | |
306 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
307 | 16, /* bitsize */ | |
308 | FALSE, /* pc_relative */ | |
309 | 0, /* bitpos */ | |
310 | complain_overflow_signed, /* complain_on_overflow */ | |
311 | bfd_elf_generic_reloc, /* special_function */ | |
312 | "R_68K_TLS_LE16", /* name */ | |
313 | FALSE, /* partial_inplace */ | |
314 | 0, /* src_mask */ | |
315 | 0x0000ffff, /* dst_mask */ | |
316 | FALSE), /* pcrel_offset */ | |
317 | ||
318 | HOWTO (R_68K_TLS_LE8, /* type */ | |
319 | 0, /* rightshift */ | |
320 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
321 | 8, /* bitsize */ | |
322 | FALSE, /* pc_relative */ | |
323 | 0, /* bitpos */ | |
324 | complain_overflow_signed, /* complain_on_overflow */ | |
325 | bfd_elf_generic_reloc, /* special_function */ | |
326 | "R_68K_TLS_LE8", /* name */ | |
327 | FALSE, /* partial_inplace */ | |
328 | 0, /* src_mask */ | |
329 | 0x000000ff, /* dst_mask */ | |
330 | FALSE), /* pcrel_offset */ | |
331 | ||
332 | /* TLS GD/LD dynamic relocations. */ | |
333 | HOWTO (R_68K_TLS_DTPMOD32, /* type */ | |
334 | 0, /* rightshift */ | |
335 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
336 | 32, /* bitsize */ | |
337 | FALSE, /* pc_relative */ | |
338 | 0, /* bitpos */ | |
339 | complain_overflow_dont, /* complain_on_overflow */ | |
340 | bfd_elf_generic_reloc, /* special_function */ | |
341 | "R_68K_TLS_DTPMOD32", /* name */ | |
342 | FALSE, /* partial_inplace */ | |
343 | 0, /* src_mask */ | |
344 | 0xffffffff, /* dst_mask */ | |
345 | FALSE), /* pcrel_offset */ | |
346 | ||
347 | HOWTO (R_68K_TLS_DTPREL32, /* type */ | |
348 | 0, /* rightshift */ | |
349 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
350 | 32, /* bitsize */ | |
351 | FALSE, /* pc_relative */ | |
352 | 0, /* bitpos */ | |
353 | complain_overflow_dont, /* complain_on_overflow */ | |
354 | bfd_elf_generic_reloc, /* special_function */ | |
355 | "R_68K_TLS_DTPREL32", /* name */ | |
356 | FALSE, /* partial_inplace */ | |
357 | 0, /* src_mask */ | |
358 | 0xffffffff, /* dst_mask */ | |
359 | FALSE), /* pcrel_offset */ | |
360 | ||
361 | HOWTO (R_68K_TLS_TPREL32, /* type */ | |
362 | 0, /* rightshift */ | |
363 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
364 | 32, /* bitsize */ | |
365 | FALSE, /* pc_relative */ | |
366 | 0, /* bitpos */ | |
367 | complain_overflow_dont, /* complain_on_overflow */ | |
368 | bfd_elf_generic_reloc, /* special_function */ | |
369 | "R_68K_TLS_TPREL32", /* name */ | |
370 | FALSE, /* partial_inplace */ | |
371 | 0, /* src_mask */ | |
372 | 0xffffffff, /* dst_mask */ | |
373 | FALSE), /* pcrel_offset */ | |
252b5132 RH |
374 | }; |
375 | ||
376 | static void | |
c86ad514 | 377 | rtype_to_howto (bfd *abfd, arelent *cache_ptr, Elf_Internal_Rela *dst) |
252b5132 | 378 | { |
c86ad514 AS |
379 | unsigned int indx = ELF32_R_TYPE (dst->r_info); |
380 | ||
381 | if (indx >= (unsigned int) R_68K_max) | |
382 | { | |
383 | (*_bfd_error_handler) (_("%B: invalid relocation type %d"), | |
384 | abfd, (int) indx); | |
385 | indx = R_68K_NONE; | |
386 | } | |
387 | cache_ptr->howto = &howto_table[indx]; | |
252b5132 RH |
388 | } |
389 | ||
390 | #define elf_info_to_howto rtype_to_howto | |
391 | ||
392 | static const struct | |
393 | { | |
394 | bfd_reloc_code_real_type bfd_val; | |
395 | int elf_val; | |
cf869cce NC |
396 | } |
397 | reloc_map[] = | |
398 | { | |
252b5132 RH |
399 | { BFD_RELOC_NONE, R_68K_NONE }, |
400 | { BFD_RELOC_32, R_68K_32 }, | |
401 | { BFD_RELOC_16, R_68K_16 }, | |
402 | { BFD_RELOC_8, R_68K_8 }, | |
403 | { BFD_RELOC_32_PCREL, R_68K_PC32 }, | |
404 | { BFD_RELOC_16_PCREL, R_68K_PC16 }, | |
405 | { BFD_RELOC_8_PCREL, R_68K_PC8 }, | |
406 | { BFD_RELOC_32_GOT_PCREL, R_68K_GOT32 }, | |
407 | { BFD_RELOC_16_GOT_PCREL, R_68K_GOT16 }, | |
408 | { BFD_RELOC_8_GOT_PCREL, R_68K_GOT8 }, | |
409 | { BFD_RELOC_32_GOTOFF, R_68K_GOT32O }, | |
410 | { BFD_RELOC_16_GOTOFF, R_68K_GOT16O }, | |
411 | { BFD_RELOC_8_GOTOFF, R_68K_GOT8O }, | |
412 | { BFD_RELOC_32_PLT_PCREL, R_68K_PLT32 }, | |
413 | { BFD_RELOC_16_PLT_PCREL, R_68K_PLT16 }, | |
414 | { BFD_RELOC_8_PLT_PCREL, R_68K_PLT8 }, | |
415 | { BFD_RELOC_32_PLTOFF, R_68K_PLT32O }, | |
416 | { BFD_RELOC_16_PLTOFF, R_68K_PLT16O }, | |
417 | { BFD_RELOC_8_PLTOFF, R_68K_PLT8O }, | |
418 | { BFD_RELOC_NONE, R_68K_COPY }, | |
419 | { BFD_RELOC_68K_GLOB_DAT, R_68K_GLOB_DAT }, | |
420 | { BFD_RELOC_68K_JMP_SLOT, R_68K_JMP_SLOT }, | |
421 | { BFD_RELOC_68K_RELATIVE, R_68K_RELATIVE }, | |
422 | { BFD_RELOC_CTOR, R_68K_32 }, | |
423 | { BFD_RELOC_VTABLE_INHERIT, R_68K_GNU_VTINHERIT }, | |
424 | { BFD_RELOC_VTABLE_ENTRY, R_68K_GNU_VTENTRY }, | |
cf869cce NC |
425 | { BFD_RELOC_68K_TLS_GD32, R_68K_TLS_GD32 }, |
426 | { BFD_RELOC_68K_TLS_GD16, R_68K_TLS_GD16 }, | |
427 | { BFD_RELOC_68K_TLS_GD8, R_68K_TLS_GD8 }, | |
428 | { BFD_RELOC_68K_TLS_LDM32, R_68K_TLS_LDM32 }, | |
429 | { BFD_RELOC_68K_TLS_LDM16, R_68K_TLS_LDM16 }, | |
430 | { BFD_RELOC_68K_TLS_LDM8, R_68K_TLS_LDM8 }, | |
431 | { BFD_RELOC_68K_TLS_LDO32, R_68K_TLS_LDO32 }, | |
432 | { BFD_RELOC_68K_TLS_LDO16, R_68K_TLS_LDO16 }, | |
433 | { BFD_RELOC_68K_TLS_LDO8, R_68K_TLS_LDO8 }, | |
434 | { BFD_RELOC_68K_TLS_IE32, R_68K_TLS_IE32 }, | |
435 | { BFD_RELOC_68K_TLS_IE16, R_68K_TLS_IE16 }, | |
436 | { BFD_RELOC_68K_TLS_IE8, R_68K_TLS_IE8 }, | |
437 | { BFD_RELOC_68K_TLS_LE32, R_68K_TLS_LE32 }, | |
438 | { BFD_RELOC_68K_TLS_LE16, R_68K_TLS_LE16 }, | |
439 | { BFD_RELOC_68K_TLS_LE8, R_68K_TLS_LE8 }, | |
252b5132 RH |
440 | }; |
441 | ||
442 | static reloc_howto_type * | |
443 | reloc_type_lookup (abfd, code) | |
121089cb | 444 | bfd *abfd ATTRIBUTE_UNUSED; |
252b5132 RH |
445 | bfd_reloc_code_real_type code; |
446 | { | |
447 | unsigned int i; | |
448 | for (i = 0; i < sizeof (reloc_map) / sizeof (reloc_map[0]); i++) | |
449 | { | |
450 | if (reloc_map[i].bfd_val == code) | |
451 | return &howto_table[reloc_map[i].elf_val]; | |
452 | } | |
453 | return 0; | |
454 | } | |
455 | ||
157090f7 AM |
456 | static reloc_howto_type * |
457 | reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, const char *r_name) | |
458 | { | |
459 | unsigned int i; | |
460 | ||
461 | for (i = 0; i < sizeof (howto_table) / sizeof (howto_table[0]); i++) | |
462 | if (howto_table[i].name != NULL | |
463 | && strcasecmp (howto_table[i].name, r_name) == 0) | |
464 | return &howto_table[i]; | |
465 | ||
466 | return NULL; | |
467 | } | |
468 | ||
252b5132 | 469 | #define bfd_elf32_bfd_reloc_type_lookup reloc_type_lookup |
157090f7 | 470 | #define bfd_elf32_bfd_reloc_name_lookup reloc_name_lookup |
252b5132 | 471 | #define ELF_ARCH bfd_arch_m68k |
252b5132 RH |
472 | \f |
473 | /* Functions for the m68k ELF linker. */ | |
474 | ||
475 | /* The name of the dynamic interpreter. This is put in the .interp | |
476 | section. */ | |
477 | ||
478 | #define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1" | |
479 | ||
cc3e26be RS |
480 | /* Describes one of the various PLT styles. */ |
481 | ||
482 | struct elf_m68k_plt_info | |
483 | { | |
484 | /* The size of each PLT entry. */ | |
485 | bfd_vma size; | |
486 | ||
487 | /* The template for the first PLT entry. */ | |
488 | const bfd_byte *plt0_entry; | |
489 | ||
490 | /* Offsets of fields in PLT0_ENTRY that require R_68K_PC32 relocations. | |
491 | The comments by each member indicate the value that the relocation | |
492 | is against. */ | |
493 | struct { | |
494 | unsigned int got4; /* .got + 4 */ | |
495 | unsigned int got8; /* .got + 8 */ | |
496 | } plt0_relocs; | |
497 | ||
498 | /* The template for a symbol's PLT entry. */ | |
499 | const bfd_byte *symbol_entry; | |
500 | ||
501 | /* Offsets of fields in SYMBOL_ENTRY that require R_68K_PC32 relocations. | |
502 | The comments by each member indicate the value that the relocation | |
503 | is against. */ | |
504 | struct { | |
505 | unsigned int got; /* the symbol's .got.plt entry */ | |
506 | unsigned int plt; /* .plt */ | |
507 | } symbol_relocs; | |
508 | ||
509 | /* The offset of the resolver stub from the start of SYMBOL_ENTRY. | |
510 | The stub starts with "move.l #relocoffset,%d0". */ | |
511 | bfd_vma symbol_resolve_entry; | |
512 | }; | |
513 | ||
252b5132 RH |
514 | /* The size in bytes of an entry in the procedure linkage table. */ |
515 | ||
516 | #define PLT_ENTRY_SIZE 20 | |
517 | ||
518 | /* The first entry in a procedure linkage table looks like this. See | |
519 | the SVR4 ABI m68k supplement to see how this works. */ | |
520 | ||
521 | static const bfd_byte elf_m68k_plt0_entry[PLT_ENTRY_SIZE] = | |
522 | { | |
523 | 0x2f, 0x3b, 0x01, 0x70, /* move.l (%pc,addr),-(%sp) */ | |
cc3e26be | 524 | 0, 0, 0, 2, /* + (.got + 4) - . */ |
252b5132 | 525 | 0x4e, 0xfb, 0x01, 0x71, /* jmp ([%pc,addr]) */ |
cc3e26be | 526 | 0, 0, 0, 2, /* + (.got + 8) - . */ |
252b5132 RH |
527 | 0, 0, 0, 0 /* pad out to 20 bytes. */ |
528 | }; | |
529 | ||
530 | /* Subsequent entries in a procedure linkage table look like this. */ | |
531 | ||
532 | static const bfd_byte elf_m68k_plt_entry[PLT_ENTRY_SIZE] = | |
533 | { | |
534 | 0x4e, 0xfb, 0x01, 0x71, /* jmp ([%pc,symbol@GOTPC]) */ | |
cc3e26be | 535 | 0, 0, 0, 2, /* + (.got.plt entry) - . */ |
252b5132 | 536 | 0x2f, 0x3c, /* move.l #offset,-(%sp) */ |
cc3e26be | 537 | 0, 0, 0, 0, /* + reloc index */ |
252b5132 | 538 | 0x60, 0xff, /* bra.l .plt */ |
cc3e26be | 539 | 0, 0, 0, 0 /* + .plt - . */ |
252b5132 RH |
540 | }; |
541 | ||
cc3e26be RS |
542 | static const struct elf_m68k_plt_info elf_m68k_plt_info = { |
543 | PLT_ENTRY_SIZE, | |
544 | elf_m68k_plt0_entry, { 4, 12 }, | |
545 | elf_m68k_plt_entry, { 4, 16 }, 8 | |
546 | }; | |
238d258f | 547 | |
7fb9f789 | 548 | #define ISAB_PLT_ENTRY_SIZE 24 |
238d258f | 549 | |
cc3e26be | 550 | static const bfd_byte elf_isab_plt0_entry[ISAB_PLT_ENTRY_SIZE] = |
238d258f | 551 | { |
cc3e26be RS |
552 | 0x20, 0x3c, /* move.l #offset,%d0 */ |
553 | 0, 0, 0, 0, /* + (.got + 4) - . */ | |
554 | 0x2f, 0x3b, 0x08, 0xfa, /* move.l (-6,%pc,%d0:l),-(%sp) */ | |
555 | 0x20, 0x3c, /* move.l #offset,%d0 */ | |
556 | 0, 0, 0, 0, /* + (.got + 8) - . */ | |
557 | 0x20, 0x7b, 0x08, 0xfa, /* move.l (-6,%pc,%d0:l), %a0 */ | |
238d258f NC |
558 | 0x4e, 0xd0, /* jmp (%a0) */ |
559 | 0x4e, 0x71 /* nop */ | |
560 | }; | |
561 | ||
562 | /* Subsequent entries in a procedure linkage table look like this. */ | |
563 | ||
cc3e26be | 564 | static const bfd_byte elf_isab_plt_entry[ISAB_PLT_ENTRY_SIZE] = |
238d258f | 565 | { |
cc3e26be RS |
566 | 0x20, 0x3c, /* move.l #offset,%d0 */ |
567 | 0, 0, 0, 0, /* + (.got.plt entry) - . */ | |
568 | 0x20, 0x7b, 0x08, 0xfa, /* move.l (-6,%pc,%d0:l), %a0 */ | |
238d258f NC |
569 | 0x4e, 0xd0, /* jmp (%a0) */ |
570 | 0x2f, 0x3c, /* move.l #offset,-(%sp) */ | |
cc3e26be | 571 | 0, 0, 0, 0, /* + reloc index */ |
238d258f | 572 | 0x60, 0xff, /* bra.l .plt */ |
cc3e26be | 573 | 0, 0, 0, 0 /* + .plt - . */ |
238d258f NC |
574 | }; |
575 | ||
cc3e26be RS |
576 | static const struct elf_m68k_plt_info elf_isab_plt_info = { |
577 | ISAB_PLT_ENTRY_SIZE, | |
578 | elf_isab_plt0_entry, { 2, 12 }, | |
579 | elf_isab_plt_entry, { 2, 20 }, 12 | |
580 | }; | |
9e1281c7 | 581 | |
7fb9f789 | 582 | #define ISAC_PLT_ENTRY_SIZE 24 |
9a2e615a NS |
583 | |
584 | static const bfd_byte elf_isac_plt0_entry[ISAC_PLT_ENTRY_SIZE] = | |
585 | { | |
586 | 0x20, 0x3c, /* move.l #offset,%d0 */ | |
587 | 0, 0, 0, 0, /* replaced with .got + 4 - . */ | |
588 | 0x2e, 0xbb, 0x08, 0xfa, /* move.l (-6,%pc,%d0:l),(%sp) */ | |
589 | 0x20, 0x3c, /* move.l #offset,%d0 */ | |
590 | 0, 0, 0, 0, /* replaced with .got + 8 - . */ | |
591 | 0x20, 0x7b, 0x08, 0xfa, /* move.l (-6,%pc,%d0:l), %a0 */ | |
592 | 0x4e, 0xd0, /* jmp (%a0) */ | |
593 | 0x4e, 0x71 /* nop */ | |
594 | }; | |
595 | ||
596 | /* Subsequent entries in a procedure linkage table look like this. */ | |
597 | ||
598 | static const bfd_byte elf_isac_plt_entry[ISAC_PLT_ENTRY_SIZE] = | |
599 | { | |
600 | 0x20, 0x3c, /* move.l #offset,%d0 */ | |
601 | 0, 0, 0, 0, /* replaced with (.got entry) - . */ | |
602 | 0x20, 0x7b, 0x08, 0xfa, /* move.l (-6,%pc,%d0:l), %a0 */ | |
603 | 0x4e, 0xd0, /* jmp (%a0) */ | |
604 | 0x2f, 0x3c, /* move.l #offset,-(%sp) */ | |
605 | 0, 0, 0, 0, /* replaced with offset into relocation table */ | |
606 | 0x61, 0xff, /* bsr.l .plt */ | |
607 | 0, 0, 0, 0 /* replaced with .plt - . */ | |
608 | }; | |
609 | ||
610 | static const struct elf_m68k_plt_info elf_isac_plt_info = { | |
611 | ISAC_PLT_ENTRY_SIZE, | |
612 | elf_isac_plt0_entry, { 2, 12}, | |
613 | elf_isac_plt_entry, { 2, 20 }, 12 | |
614 | }; | |
615 | ||
cc3e26be | 616 | #define CPU32_PLT_ENTRY_SIZE 24 |
9e1281c7 | 617 | /* Procedure linkage table entries for the cpu32 */ |
cc3e26be | 618 | static const bfd_byte elf_cpu32_plt0_entry[CPU32_PLT_ENTRY_SIZE] = |
9e1281c7 | 619 | { |
6091b433 | 620 | 0x2f, 0x3b, 0x01, 0x70, /* move.l (%pc,addr),-(%sp) */ |
cc3e26be | 621 | 0, 0, 0, 2, /* + (.got + 4) - . */ |
6091b433 | 622 | 0x22, 0x7b, 0x01, 0x70, /* moveal %pc@(0xc), %a1 */ |
cc3e26be | 623 | 0, 0, 0, 2, /* + (.got + 8) - . */ |
6091b433 | 624 | 0x4e, 0xd1, /* jmp %a1@ */ |
9e1281c7 CM |
625 | 0, 0, 0, 0, /* pad out to 24 bytes. */ |
626 | 0, 0 | |
627 | }; | |
628 | ||
cc3e26be | 629 | static const bfd_byte elf_cpu32_plt_entry[CPU32_PLT_ENTRY_SIZE] = |
9e1281c7 | 630 | { |
1ca42bad | 631 | 0x22, 0x7b, 0x01, 0x70, /* moveal %pc@(0xc), %a1 */ |
cc3e26be | 632 | 0, 0, 0, 2, /* + (.got.plt entry) - . */ |
1ca42bad | 633 | 0x4e, 0xd1, /* jmp %a1@ */ |
9e1281c7 | 634 | 0x2f, 0x3c, /* move.l #offset,-(%sp) */ |
cc3e26be | 635 | 0, 0, 0, 0, /* + reloc index */ |
9e1281c7 | 636 | 0x60, 0xff, /* bra.l .plt */ |
cc3e26be | 637 | 0, 0, 0, 0, /* + .plt - . */ |
9e1281c7 CM |
638 | 0, 0 |
639 | }; | |
640 | ||
cc3e26be RS |
641 | static const struct elf_m68k_plt_info elf_cpu32_plt_info = { |
642 | CPU32_PLT_ENTRY_SIZE, | |
643 | elf_cpu32_plt0_entry, { 4, 12 }, | |
644 | elf_cpu32_plt_entry, { 4, 18 }, 10 | |
645 | }; | |
646 | ||
252b5132 RH |
647 | /* The m68k linker needs to keep track of the number of relocs that it |
648 | decides to copy in check_relocs for each symbol. This is so that it | |
649 | can discard PC relative relocs if it doesn't need them when linking | |
650 | with -Bsymbolic. We store the information in a field extending the | |
651 | regular ELF linker hash table. */ | |
652 | ||
653 | /* This structure keeps track of the number of PC relative relocs we have | |
654 | copied for a given symbol. */ | |
655 | ||
656 | struct elf_m68k_pcrel_relocs_copied | |
657 | { | |
658 | /* Next section. */ | |
659 | struct elf_m68k_pcrel_relocs_copied *next; | |
660 | /* A section in dynobj. */ | |
661 | asection *section; | |
662 | /* Number of relocs copied in this section. */ | |
663 | bfd_size_type count; | |
664 | }; | |
665 | ||
7fb9f789 NC |
666 | /* Forward declaration. */ |
667 | struct elf_m68k_got_entry; | |
668 | ||
252b5132 RH |
669 | /* m68k ELF linker hash entry. */ |
670 | ||
671 | struct elf_m68k_link_hash_entry | |
672 | { | |
673 | struct elf_link_hash_entry root; | |
674 | ||
675 | /* Number of PC relative relocs copied for this symbol. */ | |
676 | struct elf_m68k_pcrel_relocs_copied *pcrel_relocs_copied; | |
7fb9f789 NC |
677 | |
678 | /* Key to got_entries. */ | |
679 | unsigned long got_entry_key; | |
680 | ||
681 | /* List of GOT entries for this symbol. This list is build during | |
682 | offset finalization and is used within elf_m68k_finish_dynamic_symbol | |
683 | to traverse all GOT entries for a particular symbol. | |
684 | ||
685 | ??? We could've used root.got.glist field instead, but having | |
686 | a separate field is cleaner. */ | |
687 | struct elf_m68k_got_entry *glist; | |
252b5132 RH |
688 | }; |
689 | ||
0cca5f05 AS |
690 | #define elf_m68k_hash_entry(ent) ((struct elf_m68k_link_hash_entry *) (ent)) |
691 | ||
7fb9f789 NC |
692 | /* Key part of GOT entry in hashtable. */ |
693 | struct elf_m68k_got_entry_key | |
694 | { | |
695 | /* BFD in which this symbol was defined. NULL for global symbols. */ | |
696 | const bfd *bfd; | |
697 | ||
698 | /* Symbol index. Either local symbol index or h->got_entry_key. */ | |
699 | unsigned long symndx; | |
cf869cce NC |
700 | |
701 | /* Type is one of R_68K_GOT{8, 16, 32}O, R_68K_TLS_GD{8, 16, 32}, | |
702 | R_68K_TLS_LDM{8, 16, 32} or R_68K_TLS_IE{8, 16, 32}. | |
703 | ||
704 | From perspective of hashtable key, only elf_m68k_got_reloc_type (type) | |
705 | matters. That is, we distinguish between, say, R_68K_GOT16O | |
706 | and R_68K_GOT32O when allocating offsets, but they are considered to be | |
707 | the same when searching got->entries. */ | |
708 | enum elf_m68k_reloc_type type; | |
7fb9f789 NC |
709 | }; |
710 | ||
cf869cce NC |
711 | /* Size of the GOT offset suitable for relocation. */ |
712 | enum elf_m68k_got_offset_size { R_8, R_16, R_32, R_LAST }; | |
713 | ||
7fb9f789 NC |
714 | /* Entry of the GOT. */ |
715 | struct elf_m68k_got_entry | |
716 | { | |
717 | /* GOT entries are put into a got->entries hashtable. This is the key. */ | |
718 | struct elf_m68k_got_entry_key key_; | |
719 | ||
720 | /* GOT entry data. We need s1 before offset finalization and s2 after. */ | |
721 | union | |
722 | { | |
723 | struct | |
724 | { | |
725 | /* Number of times this entry is referenced. It is used to | |
726 | filter out unnecessary GOT slots in elf_m68k_gc_sweep_hook. */ | |
727 | bfd_vma refcount; | |
7fb9f789 NC |
728 | } s1; |
729 | ||
730 | struct | |
731 | { | |
732 | /* Offset from the start of .got section. To calculate offset relative | |
733 | to GOT pointer one should substract got->offset from this value. */ | |
734 | bfd_vma offset; | |
735 | ||
736 | /* Pointer to the next GOT entry for this global symbol. | |
737 | Symbols have at most one entry in one GOT, but might | |
738 | have entries in more than one GOT. | |
739 | Root of this list is h->glist. | |
740 | NULL for local symbols. */ | |
741 | struct elf_m68k_got_entry *next; | |
742 | } s2; | |
743 | } u; | |
744 | }; | |
745 | ||
cf869cce NC |
746 | /* Return representative type for relocation R_TYPE. |
747 | This is used to avoid enumerating many relocations in comparisons, | |
748 | switches etc. */ | |
749 | ||
750 | static enum elf_m68k_reloc_type | |
751 | elf_m68k_reloc_got_type (enum elf_m68k_reloc_type r_type) | |
752 | { | |
753 | switch (r_type) | |
754 | { | |
755 | /* In most cases R_68K_GOTx relocations require the very same | |
756 | handling as R_68K_GOT32O relocation. In cases when we need | |
757 | to distinguish between the two, we use explicitly compare against | |
758 | r_type. */ | |
759 | case R_68K_GOT32: | |
760 | case R_68K_GOT16: | |
761 | case R_68K_GOT8: | |
762 | case R_68K_GOT32O: | |
763 | case R_68K_GOT16O: | |
764 | case R_68K_GOT8O: | |
765 | return R_68K_GOT32O; | |
766 | ||
767 | case R_68K_TLS_GD32: | |
768 | case R_68K_TLS_GD16: | |
769 | case R_68K_TLS_GD8: | |
770 | return R_68K_TLS_GD32; | |
771 | ||
772 | case R_68K_TLS_LDM32: | |
773 | case R_68K_TLS_LDM16: | |
774 | case R_68K_TLS_LDM8: | |
775 | return R_68K_TLS_LDM32; | |
776 | ||
777 | case R_68K_TLS_IE32: | |
778 | case R_68K_TLS_IE16: | |
779 | case R_68K_TLS_IE8: | |
780 | return R_68K_TLS_IE32; | |
781 | ||
782 | default: | |
783 | BFD_ASSERT (FALSE); | |
784 | return 0; | |
785 | } | |
786 | } | |
787 | ||
788 | /* Return size of the GOT entry offset for relocation R_TYPE. */ | |
789 | ||
790 | static enum elf_m68k_got_offset_size | |
791 | elf_m68k_reloc_got_offset_size (enum elf_m68k_reloc_type r_type) | |
792 | { | |
793 | switch (r_type) | |
794 | { | |
795 | case R_68K_GOT32: case R_68K_GOT16: case R_68K_GOT8: | |
796 | case R_68K_GOT32O: case R_68K_TLS_GD32: case R_68K_TLS_LDM32: | |
797 | case R_68K_TLS_IE32: | |
798 | return R_32; | |
799 | ||
800 | case R_68K_GOT16O: case R_68K_TLS_GD16: case R_68K_TLS_LDM16: | |
801 | case R_68K_TLS_IE16: | |
802 | return R_16; | |
803 | ||
804 | case R_68K_GOT8O: case R_68K_TLS_GD8: case R_68K_TLS_LDM8: | |
805 | case R_68K_TLS_IE8: | |
806 | return R_8; | |
807 | ||
808 | default: | |
809 | BFD_ASSERT (FALSE); | |
810 | return 0; | |
811 | } | |
812 | } | |
813 | ||
814 | /* Return number of GOT entries we need to allocate in GOT for | |
815 | relocation R_TYPE. */ | |
816 | ||
817 | static bfd_vma | |
818 | elf_m68k_reloc_got_n_slots (enum elf_m68k_reloc_type r_type) | |
819 | { | |
820 | switch (elf_m68k_reloc_got_type (r_type)) | |
821 | { | |
822 | case R_68K_GOT32O: | |
823 | case R_68K_TLS_IE32: | |
824 | return 1; | |
825 | ||
826 | case R_68K_TLS_GD32: | |
827 | case R_68K_TLS_LDM32: | |
828 | return 2; | |
829 | ||
830 | default: | |
831 | BFD_ASSERT (FALSE); | |
832 | return 0; | |
833 | } | |
834 | } | |
835 | ||
836 | /* Return TRUE if relocation R_TYPE is a TLS one. */ | |
837 | ||
838 | static bfd_boolean | |
839 | elf_m68k_reloc_tls_p (enum elf_m68k_reloc_type r_type) | |
840 | { | |
841 | switch (r_type) | |
842 | { | |
843 | case R_68K_TLS_GD32: case R_68K_TLS_GD16: case R_68K_TLS_GD8: | |
844 | case R_68K_TLS_LDM32: case R_68K_TLS_LDM16: case R_68K_TLS_LDM8: | |
845 | case R_68K_TLS_LDO32: case R_68K_TLS_LDO16: case R_68K_TLS_LDO8: | |
846 | case R_68K_TLS_IE32: case R_68K_TLS_IE16: case R_68K_TLS_IE8: | |
847 | case R_68K_TLS_LE32: case R_68K_TLS_LE16: case R_68K_TLS_LE8: | |
848 | case R_68K_TLS_DTPMOD32: case R_68K_TLS_DTPREL32: case R_68K_TLS_TPREL32: | |
849 | return TRUE; | |
850 | ||
851 | default: | |
852 | return FALSE; | |
853 | } | |
854 | } | |
855 | ||
7fb9f789 NC |
856 | /* Data structure representing a single GOT. */ |
857 | struct elf_m68k_got | |
858 | { | |
859 | /* Hashtable of 'struct elf_m68k_got_entry's. | |
860 | Starting size of this table is the maximum number of | |
861 | R_68K_GOT8O entries. */ | |
862 | htab_t entries; | |
863 | ||
cf869cce NC |
864 | /* Number of R_x slots in this GOT. Some (e.g., TLS) entries require |
865 | several GOT slots. | |
7fb9f789 | 866 | |
cf869cce NC |
867 | n_slots[R_8] is the count of R_8 slots in this GOT. |
868 | n_slots[R_16] is the cumulative count of R_8 and R_16 slots | |
869 | in this GOT. | |
870 | n_slots[R_32] is the cumulative count of R_8, R_16 and R_32 slots | |
871 | in this GOT. This is the total number of slots. */ | |
872 | bfd_vma n_slots[R_LAST]; | |
7fb9f789 | 873 | |
cf869cce | 874 | /* Number of local (entry->key_.h == NULL) slots in this GOT. |
7fb9f789 NC |
875 | This is only used to properly calculate size of .rela.got section; |
876 | see elf_m68k_partition_multi_got. */ | |
cf869cce | 877 | bfd_vma local_n_slots; |
7fb9f789 NC |
878 | |
879 | /* Offset of this GOT relative to beginning of .got section. */ | |
880 | bfd_vma offset; | |
881 | }; | |
882 | ||
883 | /* BFD and its GOT. This is an entry in multi_got->bfd2got hashtable. */ | |
884 | struct elf_m68k_bfd2got_entry | |
885 | { | |
886 | /* BFD. */ | |
887 | const bfd *bfd; | |
888 | ||
889 | /* Assigned GOT. Before partitioning multi-GOT each BFD has its own | |
890 | GOT structure. After partitioning several BFD's might [and often do] | |
891 | share a single GOT. */ | |
892 | struct elf_m68k_got *got; | |
893 | }; | |
894 | ||
895 | /* The main data structure holding all the pieces. */ | |
896 | struct elf_m68k_multi_got | |
897 | { | |
898 | /* Hashtable mapping each BFD to its GOT. If a BFD doesn't have an entry | |
899 | here, then it doesn't need a GOT (this includes the case of a BFD | |
900 | having an empty GOT). | |
901 | ||
902 | ??? This hashtable can be replaced by an array indexed by bfd->id. */ | |
903 | htab_t bfd2got; | |
904 | ||
905 | /* Next symndx to assign a global symbol. | |
906 | h->got_entry_key is initialized from this counter. */ | |
907 | unsigned long global_symndx; | |
908 | }; | |
909 | ||
252b5132 RH |
910 | /* m68k ELF linker hash table. */ |
911 | ||
912 | struct elf_m68k_link_hash_table | |
913 | { | |
914 | struct elf_link_hash_table root; | |
b6152c34 | 915 | |
87d72d41 AM |
916 | /* Small local sym cache. */ |
917 | struct sym_cache sym_cache; | |
cc3e26be RS |
918 | |
919 | /* The PLT format used by this link, or NULL if the format has not | |
920 | yet been chosen. */ | |
921 | const struct elf_m68k_plt_info *plt_info; | |
7fb9f789 NC |
922 | |
923 | /* True, if GP is loaded within each function which uses it. | |
924 | Set to TRUE when GOT negative offsets or multi-GOT is enabled. */ | |
925 | bfd_boolean local_gp_p; | |
926 | ||
927 | /* Switch controlling use of negative offsets to double the size of GOTs. */ | |
928 | bfd_boolean use_neg_got_offsets_p; | |
929 | ||
930 | /* Switch controlling generation of multiple GOTs. */ | |
931 | bfd_boolean allow_multigot_p; | |
932 | ||
933 | /* Multi-GOT data structure. */ | |
934 | struct elf_m68k_multi_got multi_got_; | |
252b5132 RH |
935 | }; |
936 | ||
252b5132 RH |
937 | /* Get the m68k ELF linker hash table from a link_info structure. */ |
938 | ||
939 | #define elf_m68k_hash_table(p) \ | |
940 | ((struct elf_m68k_link_hash_table *) (p)->hash) | |
941 | ||
7fb9f789 NC |
942 | /* Shortcut to multi-GOT data. */ |
943 | #define elf_m68k_multi_got(INFO) (&elf_m68k_hash_table (INFO)->multi_got_) | |
944 | ||
252b5132 RH |
945 | /* Create an entry in an m68k ELF linker hash table. */ |
946 | ||
947 | static struct bfd_hash_entry * | |
948 | elf_m68k_link_hash_newfunc (entry, table, string) | |
949 | struct bfd_hash_entry *entry; | |
950 | struct bfd_hash_table *table; | |
951 | const char *string; | |
952 | { | |
0cca5f05 | 953 | struct bfd_hash_entry *ret = entry; |
252b5132 RH |
954 | |
955 | /* Allocate the structure if it has not already been allocated by a | |
956 | subclass. */ | |
0cca5f05 AS |
957 | if (ret == NULL) |
958 | ret = bfd_hash_allocate (table, | |
959 | sizeof (struct elf_m68k_link_hash_entry)); | |
960 | if (ret == NULL) | |
961 | return ret; | |
252b5132 RH |
962 | |
963 | /* Call the allocation method of the superclass. */ | |
0cca5f05 AS |
964 | ret = _bfd_elf_link_hash_newfunc (ret, table, string); |
965 | if (ret != NULL) | |
7fb9f789 NC |
966 | { |
967 | elf_m68k_hash_entry (ret)->pcrel_relocs_copied = NULL; | |
968 | elf_m68k_hash_entry (ret)->got_entry_key = 0; | |
969 | elf_m68k_hash_entry (ret)->glist = NULL; | |
970 | } | |
252b5132 | 971 | |
0cca5f05 | 972 | return ret; |
252b5132 RH |
973 | } |
974 | ||
975 | /* Create an m68k ELF linker hash table. */ | |
976 | ||
977 | static struct bfd_link_hash_table * | |
978 | elf_m68k_link_hash_table_create (abfd) | |
979 | bfd *abfd; | |
980 | { | |
981 | struct elf_m68k_link_hash_table *ret; | |
dc810e39 | 982 | bfd_size_type amt = sizeof (struct elf_m68k_link_hash_table); |
252b5132 | 983 | |
e2d34d7d | 984 | ret = (struct elf_m68k_link_hash_table *) bfd_malloc (amt); |
252b5132 RH |
985 | if (ret == (struct elf_m68k_link_hash_table *) NULL) |
986 | return NULL; | |
987 | ||
66eb6687 AM |
988 | if (!_bfd_elf_link_hash_table_init (&ret->root, abfd, |
989 | elf_m68k_link_hash_newfunc, | |
990 | sizeof (struct elf_m68k_link_hash_entry))) | |
252b5132 | 991 | { |
e2d34d7d | 992 | free (ret); |
252b5132 RH |
993 | return NULL; |
994 | } | |
995 | ||
87d72d41 | 996 | ret->sym_cache.abfd = NULL; |
cc3e26be | 997 | ret->plt_info = NULL; |
7fb9f789 NC |
998 | ret->local_gp_p = FALSE; |
999 | ret->use_neg_got_offsets_p = FALSE; | |
1000 | ret->allow_multigot_p = FALSE; | |
1001 | ret->multi_got_.bfd2got = NULL; | |
1002 | ret->multi_got_.global_symndx = 1; | |
b6152c34 | 1003 | |
252b5132 RH |
1004 | return &ret->root.root; |
1005 | } | |
1006 | ||
7fb9f789 NC |
1007 | /* Destruct local data. */ |
1008 | ||
1009 | static void | |
1010 | elf_m68k_link_hash_table_free (struct bfd_link_hash_table *_htab) | |
1011 | { | |
1012 | struct elf_m68k_link_hash_table *htab; | |
1013 | ||
1014 | htab = (struct elf_m68k_link_hash_table *) _htab; | |
1015 | ||
1016 | if (htab->multi_got_.bfd2got != NULL) | |
1017 | { | |
1018 | htab_delete (htab->multi_got_.bfd2got); | |
1019 | htab->multi_got_.bfd2got = NULL; | |
1020 | } | |
1021 | } | |
1022 | ||
266abb8f NS |
1023 | /* Set the right machine number. */ |
1024 | ||
1025 | static bfd_boolean | |
1026 | elf32_m68k_object_p (bfd *abfd) | |
1027 | { | |
1028 | unsigned int mach = 0; | |
1029 | unsigned features = 0; | |
1030 | flagword eflags = elf_elfheader (abfd)->e_flags; | |
1031 | ||
425c6cb0 | 1032 | if ((eflags & EF_M68K_ARCH_MASK) == EF_M68K_M68000) |
266abb8f | 1033 | features |= m68000; |
425c6cb0 | 1034 | else if ((eflags & EF_M68K_ARCH_MASK) == EF_M68K_CPU32) |
3bdcfdf4 KH |
1035 | features |= cpu32; |
1036 | else if ((eflags & EF_M68K_ARCH_MASK) == EF_M68K_FIDO) | |
1037 | features |= fido_a; | |
425c6cb0 | 1038 | else |
266abb8f | 1039 | { |
c694fd50 | 1040 | switch (eflags & EF_M68K_CF_ISA_MASK) |
266abb8f | 1041 | { |
c694fd50 | 1042 | case EF_M68K_CF_ISA_A_NODIV: |
266abb8f NS |
1043 | features |= mcfisa_a; |
1044 | break; | |
c694fd50 | 1045 | case EF_M68K_CF_ISA_A: |
0b2e31dc NS |
1046 | features |= mcfisa_a|mcfhwdiv; |
1047 | break; | |
c694fd50 | 1048 | case EF_M68K_CF_ISA_A_PLUS: |
0b2e31dc NS |
1049 | features |= mcfisa_a|mcfisa_aa|mcfhwdiv|mcfusp; |
1050 | break; | |
c694fd50 | 1051 | case EF_M68K_CF_ISA_B_NOUSP: |
0b2e31dc NS |
1052 | features |= mcfisa_a|mcfisa_b|mcfhwdiv; |
1053 | break; | |
c694fd50 | 1054 | case EF_M68K_CF_ISA_B: |
0b2e31dc NS |
1055 | features |= mcfisa_a|mcfisa_b|mcfhwdiv|mcfusp; |
1056 | break; | |
9a2e615a NS |
1057 | case EF_M68K_CF_ISA_C: |
1058 | features |= mcfisa_a|mcfisa_c|mcfhwdiv|mcfusp; | |
1059 | break; | |
8d100c32 KH |
1060 | case EF_M68K_CF_ISA_C_NODIV: |
1061 | features |= mcfisa_a|mcfisa_c|mcfusp; | |
1062 | break; | |
266abb8f | 1063 | } |
c694fd50 | 1064 | switch (eflags & EF_M68K_CF_MAC_MASK) |
266abb8f | 1065 | { |
c694fd50 | 1066 | case EF_M68K_CF_MAC: |
266abb8f NS |
1067 | features |= mcfmac; |
1068 | break; | |
c694fd50 | 1069 | case EF_M68K_CF_EMAC: |
266abb8f NS |
1070 | features |= mcfemac; |
1071 | break; | |
1072 | } | |
c694fd50 | 1073 | if (eflags & EF_M68K_CF_FLOAT) |
266abb8f NS |
1074 | features |= cfloat; |
1075 | } | |
1076 | ||
1077 | mach = bfd_m68k_features_to_mach (features); | |
1078 | bfd_default_set_arch_mach (abfd, bfd_arch_m68k, mach); | |
1079 | ||
1080 | return TRUE; | |
1081 | } | |
1082 | ||
ae9a127f | 1083 | /* Keep m68k-specific flags in the ELF header. */ |
b34976b6 | 1084 | static bfd_boolean |
9e1281c7 CM |
1085 | elf32_m68k_set_private_flags (abfd, flags) |
1086 | bfd *abfd; | |
1087 | flagword flags; | |
1088 | { | |
1089 | elf_elfheader (abfd)->e_flags = flags; | |
b34976b6 AM |
1090 | elf_flags_init (abfd) = TRUE; |
1091 | return TRUE; | |
9e1281c7 CM |
1092 | } |
1093 | ||
9e1281c7 CM |
1094 | /* Merge backend specific data from an object file to the output |
1095 | object file when linking. */ | |
b34976b6 | 1096 | static bfd_boolean |
9e1281c7 CM |
1097 | elf32_m68k_merge_private_bfd_data (ibfd, obfd) |
1098 | bfd *ibfd; | |
1099 | bfd *obfd; | |
1100 | { | |
1101 | flagword out_flags; | |
1102 | flagword in_flags; | |
a9d34880 RS |
1103 | flagword out_isa; |
1104 | flagword in_isa; | |
1105 | const bfd_arch_info_type *arch_info; | |
7fb9f789 | 1106 | |
9e1281c7 CM |
1107 | if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour |
1108 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) | |
266abb8f NS |
1109 | return FALSE; |
1110 | ||
a9d34880 RS |
1111 | /* Get the merged machine. This checks for incompatibility between |
1112 | Coldfire & non-Coldfire flags, incompability between different | |
1113 | Coldfire ISAs, and incompability between different MAC types. */ | |
1114 | arch_info = bfd_arch_get_compatible (ibfd, obfd, FALSE); | |
1115 | if (!arch_info) | |
1116 | return FALSE; | |
9e1281c7 | 1117 | |
7fb9f789 NC |
1118 | bfd_set_arch_mach (obfd, bfd_arch_m68k, arch_info->mach); |
1119 | ||
1120 | in_flags = elf_elfheader (ibfd)->e_flags; | |
1121 | if (!elf_flags_init (obfd)) | |
1122 | { | |
1123 | elf_flags_init (obfd) = TRUE; | |
1124 | out_flags = in_flags; | |
1125 | } | |
1126 | else | |
1127 | { | |
1128 | out_flags = elf_elfheader (obfd)->e_flags; | |
1129 | unsigned int variant_mask; | |
1130 | ||
1131 | if ((in_flags & EF_M68K_ARCH_MASK) == EF_M68K_M68000) | |
1132 | variant_mask = 0; | |
1133 | else if ((in_flags & EF_M68K_ARCH_MASK) == EF_M68K_CPU32) | |
1134 | variant_mask = 0; | |
1135 | else if ((in_flags & EF_M68K_ARCH_MASK) == EF_M68K_FIDO) | |
1136 | variant_mask = 0; | |
1137 | else | |
1138 | variant_mask = EF_M68K_CF_ISA_MASK; | |
1139 | ||
1140 | in_isa = (in_flags & variant_mask); | |
1141 | out_isa = (out_flags & variant_mask); | |
1142 | if (in_isa > out_isa) | |
1143 | out_flags ^= in_isa ^ out_isa; | |
1144 | if (((in_flags & EF_M68K_ARCH_MASK) == EF_M68K_CPU32 | |
1145 | && (out_flags & EF_M68K_ARCH_MASK) == EF_M68K_FIDO) | |
1146 | || ((in_flags & EF_M68K_ARCH_MASK) == EF_M68K_FIDO | |
1147 | && (out_flags & EF_M68K_ARCH_MASK) == EF_M68K_CPU32)) | |
1148 | out_flags = EF_M68K_FIDO; | |
1149 | else | |
1150 | out_flags |= in_flags ^ in_isa; | |
1151 | } | |
1152 | elf_elfheader (obfd)->e_flags = out_flags; | |
1153 | ||
1154 | return TRUE; | |
1155 | } | |
1156 | ||
1157 | /* Display the flags field. */ | |
1158 | ||
1159 | static bfd_boolean | |
1160 | elf32_m68k_print_private_bfd_data (bfd *abfd, void * ptr) | |
1161 | { | |
1162 | FILE *file = (FILE *) ptr; | |
1163 | flagword eflags = elf_elfheader (abfd)->e_flags; | |
1164 | ||
1165 | BFD_ASSERT (abfd != NULL && ptr != NULL); | |
1166 | ||
1167 | /* Print normal ELF private data. */ | |
1168 | _bfd_elf_print_private_bfd_data (abfd, ptr); | |
1169 | ||
1170 | /* Ignore init flag - it may not be set, despite the flags field containing valid data. */ | |
1171 | ||
1172 | /* xgettext:c-format */ | |
1173 | fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags); | |
1174 | ||
1175 | if ((eflags & EF_M68K_ARCH_MASK) == EF_M68K_M68000) | |
1176 | fprintf (file, " [m68000]"); | |
1177 | else if ((eflags & EF_M68K_ARCH_MASK) == EF_M68K_CPU32) | |
1178 | fprintf (file, " [cpu32]"); | |
1179 | else if ((eflags & EF_M68K_ARCH_MASK) == EF_M68K_FIDO) | |
1180 | fprintf (file, " [fido]"); | |
1181 | else | |
1182 | { | |
1183 | if ((eflags & EF_M68K_ARCH_MASK) == EF_M68K_CFV4E) | |
1184 | fprintf (file, " [cfv4e]"); | |
1185 | ||
1186 | if (eflags & EF_M68K_CF_ISA_MASK) | |
1187 | { | |
1188 | char const *isa = _("unknown"); | |
1189 | char const *mac = _("unknown"); | |
1190 | char const *additional = ""; | |
1191 | ||
1192 | switch (eflags & EF_M68K_CF_ISA_MASK) | |
1193 | { | |
1194 | case EF_M68K_CF_ISA_A_NODIV: | |
1195 | isa = "A"; | |
1196 | additional = " [nodiv]"; | |
1197 | break; | |
1198 | case EF_M68K_CF_ISA_A: | |
1199 | isa = "A"; | |
1200 | break; | |
1201 | case EF_M68K_CF_ISA_A_PLUS: | |
1202 | isa = "A+"; | |
1203 | break; | |
1204 | case EF_M68K_CF_ISA_B_NOUSP: | |
1205 | isa = "B"; | |
1206 | additional = " [nousp]"; | |
1207 | break; | |
1208 | case EF_M68K_CF_ISA_B: | |
1209 | isa = "B"; | |
1210 | break; | |
1211 | case EF_M68K_CF_ISA_C: | |
1212 | isa = "C"; | |
1213 | break; | |
1214 | case EF_M68K_CF_ISA_C_NODIV: | |
1215 | isa = "C"; | |
1216 | additional = " [nodiv]"; | |
1217 | break; | |
1218 | } | |
1219 | fprintf (file, " [isa %s]%s", isa, additional); | |
1220 | ||
1221 | if (eflags & EF_M68K_CF_FLOAT) | |
1222 | fprintf (file, " [float]"); | |
1223 | ||
1224 | switch (eflags & EF_M68K_CF_MAC_MASK) | |
1225 | { | |
1226 | case 0: | |
1227 | mac = NULL; | |
1228 | break; | |
1229 | case EF_M68K_CF_MAC: | |
1230 | mac = "mac"; | |
1231 | break; | |
1232 | case EF_M68K_CF_EMAC: | |
1233 | mac = "emac"; | |
1234 | break; | |
1235 | } | |
1236 | if (mac) | |
1237 | fprintf (file, " [%s]", mac); | |
1238 | } | |
1239 | } | |
1240 | ||
1241 | fputc ('\n', file); | |
1242 | ||
1243 | return TRUE; | |
1244 | } | |
1245 | ||
1246 | /* Multi-GOT support implementation design: | |
1247 | ||
1248 | Multi-GOT starts in check_relocs hook. There we scan all | |
1249 | relocations of a BFD and build a local GOT (struct elf_m68k_got) | |
1250 | for it. If a single BFD appears to require too many GOT slots with | |
1251 | R_68K_GOT8O or R_68K_GOT16O relocations, we fail with notification | |
1252 | to user. | |
1253 | After check_relocs has been invoked for each input BFD, we have | |
1254 | constructed a GOT for each input BFD. | |
1255 | ||
1256 | To minimize total number of GOTs required for a particular output BFD | |
1257 | (as some environments support only 1 GOT per output object) we try | |
1258 | to merge some of the GOTs to share an offset space. Ideally [and in most | |
1259 | cases] we end up with a single GOT. In cases when there are too many | |
1260 | restricted relocations (e.g., R_68K_GOT16O relocations) we end up with | |
1261 | several GOTs, assuming the environment can handle them. | |
1262 | ||
1263 | Partitioning is done in elf_m68k_partition_multi_got. We start with | |
1264 | an empty GOT and traverse bfd2got hashtable putting got_entries from | |
1265 | local GOTs to the new 'big' one. We do that by constructing an | |
1266 | intermediate GOT holding all the entries the local GOT has and the big | |
1267 | GOT lacks. Then we check if there is room in the big GOT to accomodate | |
1268 | all the entries from diff. On success we add those entries to the big | |
1269 | GOT; on failure we start the new 'big' GOT and retry the adding of | |
1270 | entries from the local GOT. Note that this retry will always succeed as | |
1271 | each local GOT doesn't overflow the limits. After partitioning we | |
1272 | end up with each bfd assigned one of the big GOTs. GOT entries in the | |
1273 | big GOTs are initialized with GOT offsets. Note that big GOTs are | |
1274 | positioned consequently in program space and represent a single huge GOT | |
1275 | to the outside world. | |
1276 | ||
1277 | After that we get to elf_m68k_relocate_section. There we | |
1278 | adjust relocations of GOT pointer (_GLOBAL_OFFSET_TABLE_) and symbol | |
1279 | relocations to refer to appropriate [assigned to current input_bfd] | |
1280 | big GOT. | |
1281 | ||
1282 | Notes: | |
1283 | ||
cf869cce NC |
1284 | GOT entry type: We have several types of GOT entries. |
1285 | * R_8 type is used in entries for symbols that have at least one | |
1286 | R_68K_GOT8O or R_68K_TLS_*8 relocation. We can have at most 0x40 | |
7fb9f789 | 1287 | such entries in one GOT. |
cf869cce NC |
1288 | * R_16 type is used in entries for symbols that have at least one |
1289 | R_68K_GOT16O or R_68K_TLS_*16 relocation and no R_8 relocations. | |
7fb9f789 | 1290 | We can have at most 0x4000 such entries in one GOT. |
cf869cce NC |
1291 | * R_32 type is used in all other cases. We can have as many |
1292 | such entries in one GOT as we'd like. | |
7fb9f789 NC |
1293 | When counting relocations we have to include the count of the smaller |
1294 | ranged relocations in the counts of the larger ranged ones in order | |
1295 | to correctly detect overflow. | |
1296 | ||
1297 | Sorting the GOT: In each GOT starting offsets are assigned to | |
cf869cce NC |
1298 | R_8 entries, which are followed by R_16 entries, and |
1299 | R_32 entries go at the end. See finalize_got_offsets for details. | |
7fb9f789 NC |
1300 | |
1301 | Negative GOT offsets: To double usable offset range of GOTs we use | |
1302 | negative offsets. As we assign entries with GOT offsets relative to | |
1303 | start of .got section, the offset values are positive. They become | |
1304 | negative only in relocate_section where got->offset value is | |
1305 | subtracted from them. | |
1306 | ||
1307 | 3 special GOT entries: There are 3 special GOT entries used internally | |
1308 | by loader. These entries happen to be placed to .got.plt section, | |
1309 | so we don't do anything about them in multi-GOT support. | |
1310 | ||
1311 | Memory management: All data except for hashtables | |
1312 | multi_got->bfd2got and got->entries are allocated on | |
1313 | elf_hash_table (info)->dynobj bfd (for this reason we pass 'info' | |
1314 | to most functions), so we don't need to care to free them. At the | |
1315 | moment of allocation hashtables are being linked into main data | |
1316 | structure (multi_got), all pieces of which are reachable from | |
1317 | elf_m68k_multi_got (info). We deallocate them in | |
1318 | elf_m68k_link_hash_table_free. */ | |
1319 | ||
1320 | /* Initialize GOT. */ | |
1321 | ||
1322 | static void | |
cf869cce NC |
1323 | elf_m68k_init_got (struct elf_m68k_got *got) |
1324 | { | |
1325 | got->entries = NULL; | |
1326 | got->n_slots[R_8] = 0; | |
1327 | got->n_slots[R_16] = 0; | |
1328 | got->n_slots[R_32] = 0; | |
1329 | got->local_n_slots = 0; | |
1330 | got->offset = (bfd_vma) -1; | |
7fb9f789 NC |
1331 | } |
1332 | ||
1333 | /* Destruct GOT. */ | |
1334 | ||
1335 | static void | |
1336 | elf_m68k_clear_got (struct elf_m68k_got *got) | |
1337 | { | |
1338 | if (got->entries != NULL) | |
1339 | { | |
1340 | htab_delete (got->entries); | |
1341 | got->entries = NULL; | |
1342 | } | |
1343 | } | |
1344 | ||
1345 | /* Create and empty GOT structure. INFO is the context where memory | |
1346 | should be allocated. */ | |
1347 | ||
1348 | static struct elf_m68k_got * | |
1349 | elf_m68k_create_empty_got (struct bfd_link_info *info) | |
1350 | { | |
1351 | struct elf_m68k_got *got; | |
1352 | ||
1353 | got = bfd_alloc (elf_hash_table (info)->dynobj, sizeof (*got)); | |
1354 | if (got == NULL) | |
1355 | return NULL; | |
1356 | ||
cf869cce | 1357 | elf_m68k_init_got (got); |
7fb9f789 NC |
1358 | |
1359 | return got; | |
1360 | } | |
1361 | ||
1362 | /* Initialize KEY. */ | |
1363 | ||
1364 | static void | |
1365 | elf_m68k_init_got_entry_key (struct elf_m68k_got_entry_key *key, | |
1366 | struct elf_link_hash_entry *h, | |
cf869cce NC |
1367 | const bfd *abfd, unsigned long symndx, |
1368 | enum elf_m68k_reloc_type reloc_type) | |
7fb9f789 | 1369 | { |
cf869cce NC |
1370 | if (elf_m68k_reloc_got_type (reloc_type) == R_68K_TLS_LDM32) |
1371 | /* All TLS_LDM relocations share a single GOT entry. */ | |
1372 | { | |
1373 | key->bfd = NULL; | |
1374 | key->symndx = 0; | |
1375 | } | |
1376 | else if (h != NULL) | |
1377 | /* Global symbols are identified with their got_entry_key. */ | |
7fb9f789 NC |
1378 | { |
1379 | key->bfd = NULL; | |
1380 | key->symndx = elf_m68k_hash_entry (h)->got_entry_key; | |
1381 | BFD_ASSERT (key->symndx != 0); | |
1382 | } | |
1383 | else | |
cf869cce | 1384 | /* Local symbols are identified by BFD they appear in and symndx. */ |
7fb9f789 NC |
1385 | { |
1386 | key->bfd = abfd; | |
1387 | key->symndx = symndx; | |
1388 | } | |
cf869cce NC |
1389 | |
1390 | key->type = reloc_type; | |
7fb9f789 NC |
1391 | } |
1392 | ||
1393 | /* Calculate hash of got_entry. | |
1394 | ??? Is it good? */ | |
1395 | ||
1396 | static hashval_t | |
1397 | elf_m68k_got_entry_hash (const void *_entry) | |
1398 | { | |
1399 | const struct elf_m68k_got_entry_key *key; | |
1400 | ||
1401 | key = &((const struct elf_m68k_got_entry *) _entry)->key_; | |
1402 | ||
cf869cce NC |
1403 | return (key->symndx |
1404 | + (key->bfd != NULL ? (int) key->bfd->id : -1) | |
1405 | + elf_m68k_reloc_got_type (key->type)); | |
7fb9f789 NC |
1406 | } |
1407 | ||
1408 | /* Check if two got entries are equal. */ | |
1409 | ||
1410 | static int | |
1411 | elf_m68k_got_entry_eq (const void *_entry1, const void *_entry2) | |
1412 | { | |
1413 | const struct elf_m68k_got_entry_key *key1; | |
1414 | const struct elf_m68k_got_entry_key *key2; | |
1415 | ||
1416 | key1 = &((const struct elf_m68k_got_entry *) _entry1)->key_; | |
1417 | key2 = &((const struct elf_m68k_got_entry *) _entry2)->key_; | |
1418 | ||
1419 | return (key1->bfd == key2->bfd | |
cf869cce NC |
1420 | && key1->symndx == key2->symndx |
1421 | && (elf_m68k_reloc_got_type (key1->type) | |
1422 | == elf_m68k_reloc_got_type (key2->type))); | |
7fb9f789 NC |
1423 | } |
1424 | ||
cf869cce NC |
1425 | /* When using negative offsets, we allocate one extra R_8, one extra R_16 |
1426 | and one extra R_32 slots to simplify handling of 2-slot entries during | |
1427 | offset allocation -- hence -1 for R_8 slots and -2 for R_16 slots. */ | |
1428 | ||
1429 | /* Maximal number of R_8 slots in a single GOT. */ | |
1430 | #define ELF_M68K_R_8_MAX_N_SLOTS_IN_GOT(INFO) \ | |
7fb9f789 | 1431 | (elf_m68k_hash_table (INFO)->use_neg_got_offsets_p \ |
cf869cce | 1432 | ? (0x40 - 1) \ |
7fb9f789 NC |
1433 | : 0x20) |
1434 | ||
cf869cce NC |
1435 | /* Maximal number of R_8 and R_16 slots in a single GOT. */ |
1436 | #define ELF_M68K_R_8_16_MAX_N_SLOTS_IN_GOT(INFO) \ | |
7fb9f789 | 1437 | (elf_m68k_hash_table (INFO)->use_neg_got_offsets_p \ |
cf869cce | 1438 | ? (0x4000 - 2) \ |
7fb9f789 NC |
1439 | : 0x2000) |
1440 | ||
1441 | /* SEARCH - simply search the hashtable, don't insert new entries or fail when | |
1442 | the entry cannot be found. | |
1443 | FIND_OR_CREATE - search for an existing entry, but create new if there's | |
1444 | no such. | |
1445 | MUST_FIND - search for an existing entry and assert that it exist. | |
1446 | MUST_CREATE - assert that there's no such entry and create new one. */ | |
1447 | enum elf_m68k_get_entry_howto | |
1448 | { | |
1449 | SEARCH, | |
1450 | FIND_OR_CREATE, | |
1451 | MUST_FIND, | |
1452 | MUST_CREATE | |
1453 | }; | |
1454 | ||
1455 | /* Get or create (depending on HOWTO) entry with KEY in GOT. | |
1456 | INFO is context in which memory should be allocated (can be NULL if | |
1457 | HOWTO is SEARCH or MUST_FIND). */ | |
1458 | ||
1459 | static struct elf_m68k_got_entry * | |
1460 | elf_m68k_get_got_entry (struct elf_m68k_got *got, | |
1461 | const struct elf_m68k_got_entry_key *key, | |
1462 | enum elf_m68k_get_entry_howto howto, | |
1463 | struct bfd_link_info *info) | |
1464 | { | |
1465 | struct elf_m68k_got_entry entry_; | |
1466 | struct elf_m68k_got_entry *entry; | |
1467 | void **ptr; | |
1468 | ||
1469 | BFD_ASSERT ((info == NULL) == (howto == SEARCH || howto == MUST_FIND)); | |
1470 | ||
1471 | if (got->entries == NULL) | |
1472 | /* This is the first entry in ABFD. Initialize hashtable. */ | |
1473 | { | |
1474 | if (howto == SEARCH) | |
1475 | return NULL; | |
1476 | ||
cf869cce | 1477 | got->entries = htab_try_create (ELF_M68K_R_8_MAX_N_SLOTS_IN_GOT |
7fb9f789 NC |
1478 | (info), |
1479 | elf_m68k_got_entry_hash, | |
1480 | elf_m68k_got_entry_eq, NULL); | |
1481 | if (got->entries == NULL) | |
1482 | { | |
1483 | bfd_set_error (bfd_error_no_memory); | |
1484 | return NULL; | |
1485 | } | |
1486 | } | |
1487 | ||
1488 | entry_.key_ = *key; | |
1489 | ptr = htab_find_slot (got->entries, &entry_, (howto != SEARCH | |
1490 | ? INSERT : NO_INSERT)); | |
1491 | if (ptr == NULL) | |
1492 | { | |
1493 | if (howto == SEARCH) | |
1494 | /* Entry not found. */ | |
1495 | return NULL; | |
1496 | ||
1497 | /* We're out of memory. */ | |
1498 | bfd_set_error (bfd_error_no_memory); | |
1499 | return NULL; | |
1500 | } | |
1501 | ||
1502 | if (*ptr == NULL) | |
1503 | /* We didn't find the entry and we're asked to create a new one. */ | |
1504 | { | |
1505 | BFD_ASSERT (howto != MUST_FIND && howto != SEARCH); | |
1506 | ||
1507 | entry = bfd_alloc (elf_hash_table (info)->dynobj, sizeof (*entry)); | |
1508 | if (entry == NULL) | |
1509 | return NULL; | |
1510 | ||
1511 | /* Initialize new entry. */ | |
1512 | entry->key_ = *key; | |
1513 | ||
1514 | entry->u.s1.refcount = 0; | |
cf869cce NC |
1515 | |
1516 | /* Mark the entry as not initialized. */ | |
1517 | entry->key_.type = R_68K_max; | |
7fb9f789 NC |
1518 | |
1519 | *ptr = entry; | |
1520 | } | |
1521 | else | |
1522 | /* We found the entry. */ | |
1523 | { | |
1524 | BFD_ASSERT (howto != MUST_CREATE); | |
1525 | ||
1526 | entry = *ptr; | |
1527 | } | |
1528 | ||
1529 | return entry; | |
1530 | } | |
1531 | ||
1532 | /* Update GOT counters when merging entry of WAS type with entry of NEW type. | |
1533 | Return the value to which ENTRY's type should be set. */ | |
1534 | ||
cf869cce NC |
1535 | static enum elf_m68k_reloc_type |
1536 | elf_m68k_update_got_entry_type (struct elf_m68k_got *got, | |
1537 | enum elf_m68k_reloc_type was, | |
d3ce72d0 | 1538 | enum elf_m68k_reloc_type new_reloc) |
7fb9f789 | 1539 | { |
cf869cce NC |
1540 | enum elf_m68k_got_offset_size was_size; |
1541 | enum elf_m68k_got_offset_size new_size; | |
1542 | bfd_vma n_slots; | |
1543 | ||
1544 | if (was == R_68K_max) | |
1545 | /* The type of the entry is not initialized yet. */ | |
7fb9f789 | 1546 | { |
cf869cce NC |
1547 | /* Update all got->n_slots counters, including n_slots[R_32]. */ |
1548 | was_size = R_LAST; | |
7fb9f789 | 1549 | |
d3ce72d0 | 1550 | was = new_reloc; |
7fb9f789 | 1551 | } |
7fb9f789 | 1552 | else |
cf869cce NC |
1553 | { |
1554 | /* !!! We, probably, should emit an error rather then fail on assert | |
1555 | in such a case. */ | |
1556 | BFD_ASSERT (elf_m68k_reloc_got_type (was) | |
d3ce72d0 | 1557 | == elf_m68k_reloc_got_type (new_reloc)); |
cf869cce NC |
1558 | |
1559 | was_size = elf_m68k_reloc_got_offset_size (was); | |
1560 | } | |
1561 | ||
d3ce72d0 NC |
1562 | new_size = elf_m68k_reloc_got_offset_size (new_reloc); |
1563 | n_slots = elf_m68k_reloc_got_n_slots (new_reloc); | |
cf869cce NC |
1564 | |
1565 | while (was_size > new_size) | |
1566 | { | |
1567 | --was_size; | |
1568 | got->n_slots[was_size] += n_slots; | |
1569 | } | |
7fb9f789 | 1570 | |
d3ce72d0 | 1571 | if (new_reloc > was) |
cf869cce NC |
1572 | /* Relocations are ordered from bigger got offset size to lesser, |
1573 | so choose the relocation type with lesser offset size. */ | |
d3ce72d0 | 1574 | was = new_reloc; |
cf869cce NC |
1575 | |
1576 | return was; | |
7fb9f789 NC |
1577 | } |
1578 | ||
1579 | /* Update GOT counters when removing an entry of type TYPE. */ | |
1580 | ||
1581 | static void | |
cf869cce NC |
1582 | elf_m68k_remove_got_entry_type (struct elf_m68k_got *got, |
1583 | enum elf_m68k_reloc_type type) | |
7fb9f789 | 1584 | { |
cf869cce NC |
1585 | enum elf_m68k_got_offset_size os; |
1586 | bfd_vma n_slots; | |
7fb9f789 | 1587 | |
cf869cce | 1588 | n_slots = elf_m68k_reloc_got_n_slots (type); |
7fb9f789 | 1589 | |
cf869cce NC |
1590 | /* Decrese counter of slots with offset size corresponding to TYPE |
1591 | and all greater offset sizes. */ | |
1592 | for (os = elf_m68k_reloc_got_offset_size (type); os <= R_32; ++os) | |
1593 | { | |
1594 | BFD_ASSERT (got->n_slots[os] >= n_slots); | |
7fb9f789 | 1595 | |
cf869cce | 1596 | got->n_slots[os] -= n_slots; |
7fb9f789 NC |
1597 | } |
1598 | } | |
1599 | ||
1600 | /* Add new or update existing entry to GOT. | |
1601 | H, ABFD, TYPE and SYMNDX is data for the entry. | |
1602 | INFO is a context where memory should be allocated. */ | |
1603 | ||
1604 | static struct elf_m68k_got_entry * | |
1605 | elf_m68k_add_entry_to_got (struct elf_m68k_got *got, | |
1606 | struct elf_link_hash_entry *h, | |
1607 | const bfd *abfd, | |
cf869cce NC |
1608 | enum elf_m68k_reloc_type reloc_type, |
1609 | unsigned long symndx, | |
7fb9f789 NC |
1610 | struct bfd_link_info *info) |
1611 | { | |
1612 | struct elf_m68k_got_entry_key key_; | |
1613 | struct elf_m68k_got_entry *entry; | |
1614 | ||
1615 | if (h != NULL && elf_m68k_hash_entry (h)->got_entry_key == 0) | |
1616 | elf_m68k_hash_entry (h)->got_entry_key | |
1617 | = elf_m68k_multi_got (info)->global_symndx++; | |
1618 | ||
cf869cce | 1619 | elf_m68k_init_got_entry_key (&key_, h, abfd, symndx, reloc_type); |
7fb9f789 NC |
1620 | |
1621 | entry = elf_m68k_get_got_entry (got, &key_, FIND_OR_CREATE, info); | |
1622 | if (entry == NULL) | |
1623 | return NULL; | |
1624 | ||
cf869cce NC |
1625 | /* Determine entry's type and update got->n_slots counters. */ |
1626 | entry->key_.type = elf_m68k_update_got_entry_type (got, | |
1627 | entry->key_.type, | |
1628 | reloc_type); | |
1629 | ||
7fb9f789 NC |
1630 | /* Update refcount. */ |
1631 | ++entry->u.s1.refcount; | |
1632 | ||
1633 | if (entry->u.s1.refcount == 1) | |
1634 | /* We see this entry for the first time. */ | |
1635 | { | |
1636 | if (entry->key_.bfd != NULL) | |
cf869cce | 1637 | got->local_n_slots += elf_m68k_reloc_got_n_slots (entry->key_.type); |
7fb9f789 NC |
1638 | } |
1639 | ||
cf869cce | 1640 | BFD_ASSERT (got->n_slots[R_32] >= got->local_n_slots); |
7fb9f789 | 1641 | |
cf869cce NC |
1642 | if ((got->n_slots[R_8] |
1643 | > ELF_M68K_R_8_MAX_N_SLOTS_IN_GOT (info)) | |
1644 | || (got->n_slots[R_16] | |
1645 | > ELF_M68K_R_8_16_MAX_N_SLOTS_IN_GOT (info))) | |
7fb9f789 NC |
1646 | /* This BFD has too many relocation. */ |
1647 | { | |
cf869cce | 1648 | if (got->n_slots[R_8] > ELF_M68K_R_8_MAX_N_SLOTS_IN_GOT (info)) |
7fb9f789 | 1649 | (*_bfd_error_handler) (_("%B: GOT overflow: " |
cf869cce NC |
1650 | "Number of relocations with 8-bit " |
1651 | "offset > %d"), | |
7fb9f789 | 1652 | abfd, |
cf869cce | 1653 | ELF_M68K_R_8_MAX_N_SLOTS_IN_GOT (info)); |
7fb9f789 NC |
1654 | else |
1655 | (*_bfd_error_handler) (_("%B: GOT overflow: " | |
cf869cce NC |
1656 | "Number of relocations with 8- or 16-bit " |
1657 | "offset > %d"), | |
7fb9f789 | 1658 | abfd, |
cf869cce | 1659 | ELF_M68K_R_8_16_MAX_N_SLOTS_IN_GOT (info)); |
7fb9f789 NC |
1660 | |
1661 | return NULL; | |
1662 | } | |
1663 | ||
1664 | return entry; | |
1665 | } | |
1666 | ||
1667 | /* Compute the hash value of the bfd in a bfd2got hash entry. */ | |
1668 | ||
1669 | static hashval_t | |
1670 | elf_m68k_bfd2got_entry_hash (const void *entry) | |
1671 | { | |
1672 | const struct elf_m68k_bfd2got_entry *e; | |
1673 | ||
1674 | e = (const struct elf_m68k_bfd2got_entry *) entry; | |
1675 | ||
1676 | return e->bfd->id; | |
1677 | } | |
1678 | ||
1679 | /* Check whether two hash entries have the same bfd. */ | |
1680 | ||
1681 | static int | |
1682 | elf_m68k_bfd2got_entry_eq (const void *entry1, const void *entry2) | |
1683 | { | |
1684 | const struct elf_m68k_bfd2got_entry *e1; | |
1685 | const struct elf_m68k_bfd2got_entry *e2; | |
1686 | ||
1687 | e1 = (const struct elf_m68k_bfd2got_entry *) entry1; | |
1688 | e2 = (const struct elf_m68k_bfd2got_entry *) entry2; | |
1689 | ||
1690 | return e1->bfd == e2->bfd; | |
1691 | } | |
1692 | ||
1693 | /* Destruct a bfd2got entry. */ | |
1694 | ||
1695 | static void | |
1696 | elf_m68k_bfd2got_entry_del (void *_entry) | |
1697 | { | |
1698 | struct elf_m68k_bfd2got_entry *entry; | |
1699 | ||
1700 | entry = (struct elf_m68k_bfd2got_entry *) _entry; | |
1701 | ||
1702 | BFD_ASSERT (entry->got != NULL); | |
1703 | elf_m68k_clear_got (entry->got); | |
1704 | } | |
1705 | ||
1706 | /* Find existing or create new (depending on HOWTO) bfd2got entry in | |
1707 | MULTI_GOT. ABFD is the bfd we need a GOT for. INFO is a context where | |
1708 | memory should be allocated. */ | |
1709 | ||
1710 | static struct elf_m68k_bfd2got_entry * | |
1711 | elf_m68k_get_bfd2got_entry (struct elf_m68k_multi_got *multi_got, | |
1712 | const bfd *abfd, | |
1713 | enum elf_m68k_get_entry_howto howto, | |
1714 | struct bfd_link_info *info) | |
1715 | { | |
1716 | struct elf_m68k_bfd2got_entry entry_; | |
1717 | void **ptr; | |
1718 | struct elf_m68k_bfd2got_entry *entry; | |
1719 | ||
1720 | BFD_ASSERT ((info == NULL) == (howto == SEARCH || howto == MUST_FIND)); | |
1721 | ||
1722 | if (multi_got->bfd2got == NULL) | |
1723 | /* This is the first GOT. Initialize bfd2got. */ | |
1724 | { | |
1725 | if (howto == SEARCH) | |
1726 | return NULL; | |
1727 | ||
1728 | multi_got->bfd2got = htab_try_create (1, elf_m68k_bfd2got_entry_hash, | |
1729 | elf_m68k_bfd2got_entry_eq, | |
1730 | elf_m68k_bfd2got_entry_del); | |
1731 | if (multi_got->bfd2got == NULL) | |
1732 | { | |
1733 | bfd_set_error (bfd_error_no_memory); | |
1734 | return NULL; | |
1735 | } | |
1736 | } | |
1737 | ||
1738 | entry_.bfd = abfd; | |
1739 | ptr = htab_find_slot (multi_got->bfd2got, &entry_, (howto != SEARCH | |
1740 | ? INSERT : NO_INSERT)); | |
1741 | if (ptr == NULL) | |
1742 | { | |
1743 | if (howto == SEARCH) | |
1744 | /* Entry not found. */ | |
1745 | return NULL; | |
1746 | ||
1747 | /* We're out of memory. */ | |
1748 | bfd_set_error (bfd_error_no_memory); | |
1749 | return NULL; | |
1750 | } | |
1751 | ||
1752 | if (*ptr == NULL) | |
1753 | /* Entry was not found. Create new one. */ | |
1754 | { | |
1755 | BFD_ASSERT (howto != MUST_FIND && howto != SEARCH); | |
1756 | ||
1757 | entry = ((struct elf_m68k_bfd2got_entry *) | |
1758 | bfd_alloc (elf_hash_table (info)->dynobj, sizeof (*entry))); | |
1759 | if (entry == NULL) | |
1760 | return NULL; | |
1761 | ||
1762 | entry->bfd = abfd; | |
1763 | ||
1764 | entry->got = elf_m68k_create_empty_got (info); | |
1765 | if (entry->got == NULL) | |
1766 | return NULL; | |
1767 | ||
1768 | *ptr = entry; | |
1769 | } | |
1770 | else | |
1771 | { | |
1772 | BFD_ASSERT (howto != MUST_CREATE); | |
1773 | ||
1774 | /* Return existing entry. */ | |
1775 | entry = *ptr; | |
1776 | } | |
1777 | ||
1778 | return entry; | |
1779 | } | |
1780 | ||
1781 | struct elf_m68k_can_merge_gots_arg | |
1782 | { | |
1783 | /* A current_got that we constructing a DIFF against. */ | |
1784 | struct elf_m68k_got *big; | |
1785 | ||
1786 | /* GOT holding entries not present or that should be changed in | |
1787 | BIG. */ | |
1788 | struct elf_m68k_got *diff; | |
1789 | ||
1790 | /* Context where to allocate memory. */ | |
1791 | struct bfd_link_info *info; | |
1792 | ||
1793 | /* Error flag. */ | |
1794 | bfd_boolean error_p; | |
1795 | }; | |
1796 | ||
1797 | /* Process a single entry from the small GOT to see if it should be added | |
1798 | or updated in the big GOT. */ | |
1799 | ||
1800 | static int | |
1801 | elf_m68k_can_merge_gots_1 (void **_entry_ptr, void *_arg) | |
1802 | { | |
1803 | const struct elf_m68k_got_entry *entry1; | |
1804 | struct elf_m68k_can_merge_gots_arg *arg; | |
1805 | const struct elf_m68k_got_entry *entry2; | |
cf869cce | 1806 | enum elf_m68k_reloc_type type; |
7fb9f789 NC |
1807 | |
1808 | entry1 = (const struct elf_m68k_got_entry *) *_entry_ptr; | |
1809 | arg = (struct elf_m68k_can_merge_gots_arg *) _arg; | |
1810 | ||
1811 | entry2 = elf_m68k_get_got_entry (arg->big, &entry1->key_, SEARCH, NULL); | |
1812 | ||
1813 | if (entry2 != NULL) | |
cf869cce | 1814 | /* We found an existing entry. Check if we should update it. */ |
7fb9f789 | 1815 | { |
cf869cce NC |
1816 | type = elf_m68k_update_got_entry_type (arg->diff, |
1817 | entry2->key_.type, | |
1818 | entry1->key_.type); | |
7fb9f789 | 1819 | |
cf869cce | 1820 | if (type == entry2->key_.type) |
7fb9f789 NC |
1821 | /* ENTRY1 doesn't update data in ENTRY2. Skip it. |
1822 | To skip creation of difference entry we use the type, | |
1823 | which we won't see in GOT entries for sure. */ | |
cf869cce | 1824 | type = R_68K_max; |
7fb9f789 NC |
1825 | } |
1826 | else | |
cf869cce | 1827 | /* We didn't find the entry. Add entry1 to DIFF. */ |
7fb9f789 | 1828 | { |
cf869cce | 1829 | BFD_ASSERT (entry1->key_.type != R_68K_max); |
7fb9f789 | 1830 | |
cf869cce NC |
1831 | type = elf_m68k_update_got_entry_type (arg->diff, |
1832 | R_68K_max, entry1->key_.type); | |
7fb9f789 | 1833 | |
7fb9f789 | 1834 | if (entry1->key_.bfd != NULL) |
cf869cce | 1835 | arg->diff->local_n_slots += elf_m68k_reloc_got_n_slots (type); |
7fb9f789 NC |
1836 | } |
1837 | ||
cf869cce | 1838 | if (type != R_68K_max) |
7fb9f789 NC |
1839 | /* Create an entry in DIFF. */ |
1840 | { | |
1841 | struct elf_m68k_got_entry *entry; | |
1842 | ||
1843 | entry = elf_m68k_get_got_entry (arg->diff, &entry1->key_, MUST_CREATE, | |
1844 | arg->info); | |
1845 | if (entry == NULL) | |
1846 | { | |
1847 | arg->error_p = TRUE; | |
1848 | return 0; | |
1849 | } | |
1850 | ||
cf869cce | 1851 | entry->key_.type = type; |
7fb9f789 NC |
1852 | } |
1853 | ||
1854 | return 1; | |
1855 | } | |
1856 | ||
1857 | /* Return TRUE if SMALL GOT can be added to BIG GOT without overflowing it. | |
1858 | Construct DIFF GOT holding the entries which should be added or updated | |
1859 | in BIG GOT to accumulate information from SMALL. | |
1860 | INFO is the context where memory should be allocated. */ | |
1861 | ||
1862 | static bfd_boolean | |
1863 | elf_m68k_can_merge_gots (struct elf_m68k_got *big, | |
1864 | const struct elf_m68k_got *small, | |
1865 | struct bfd_link_info *info, | |
1866 | struct elf_m68k_got *diff) | |
1867 | { | |
1868 | struct elf_m68k_can_merge_gots_arg arg_; | |
1869 | ||
1870 | BFD_ASSERT (small->offset == (bfd_vma) -1); | |
1871 | ||
1872 | arg_.big = big; | |
1873 | arg_.diff = diff; | |
1874 | arg_.info = info; | |
1875 | arg_.error_p = FALSE; | |
1876 | htab_traverse_noresize (small->entries, elf_m68k_can_merge_gots_1, &arg_); | |
1877 | if (arg_.error_p) | |
1878 | { | |
1879 | diff->offset = 0; | |
1880 | return FALSE; | |
1881 | } | |
1882 | ||
1883 | /* Check for overflow. */ | |
cf869cce NC |
1884 | if ((big->n_slots[R_8] + arg_.diff->n_slots[R_8] |
1885 | > ELF_M68K_R_8_MAX_N_SLOTS_IN_GOT (info)) | |
1886 | || (big->n_slots[R_16] + arg_.diff->n_slots[R_16] | |
1887 | > ELF_M68K_R_8_16_MAX_N_SLOTS_IN_GOT (info))) | |
7fb9f789 NC |
1888 | return FALSE; |
1889 | ||
1890 | return TRUE; | |
1891 | } | |
1892 | ||
1893 | struct elf_m68k_merge_gots_arg | |
1894 | { | |
1895 | /* The BIG got. */ | |
1896 | struct elf_m68k_got *big; | |
1897 | ||
1898 | /* Context where memory should be allocated. */ | |
1899 | struct bfd_link_info *info; | |
1900 | ||
1901 | /* Error flag. */ | |
1902 | bfd_boolean error_p; | |
1903 | }; | |
1904 | ||
1905 | /* Process a single entry from DIFF got. Add or update corresponding | |
1906 | entry in the BIG got. */ | |
1907 | ||
1908 | static int | |
1909 | elf_m68k_merge_gots_1 (void **entry_ptr, void *_arg) | |
1910 | { | |
1911 | const struct elf_m68k_got_entry *from; | |
1912 | struct elf_m68k_merge_gots_arg *arg; | |
1913 | struct elf_m68k_got_entry *to; | |
1914 | ||
1915 | from = (const struct elf_m68k_got_entry *) *entry_ptr; | |
1916 | arg = (struct elf_m68k_merge_gots_arg *) _arg; | |
1917 | ||
1918 | to = elf_m68k_get_got_entry (arg->big, &from->key_, FIND_OR_CREATE, | |
1919 | arg->info); | |
1920 | if (to == NULL) | |
1921 | { | |
1922 | arg->error_p = TRUE; | |
1923 | return 0; | |
1924 | } | |
1925 | ||
1926 | BFD_ASSERT (to->u.s1.refcount == 0); | |
1927 | /* All we need to merge is TYPE. */ | |
cf869cce | 1928 | to->key_.type = from->key_.type; |
7fb9f789 NC |
1929 | |
1930 | return 1; | |
1931 | } | |
1932 | ||
1933 | /* Merge data from DIFF to BIG. INFO is context where memory should be | |
1934 | allocated. */ | |
1935 | ||
1936 | static bfd_boolean | |
1937 | elf_m68k_merge_gots (struct elf_m68k_got *big, | |
1938 | struct elf_m68k_got *diff, | |
1939 | struct bfd_link_info *info) | |
1940 | { | |
1941 | if (diff->entries != NULL) | |
1942 | /* DIFF is not empty. Merge it into BIG GOT. */ | |
1943 | { | |
1944 | struct elf_m68k_merge_gots_arg arg_; | |
1945 | ||
1946 | /* Merge entries. */ | |
1947 | arg_.big = big; | |
1948 | arg_.info = info; | |
1949 | arg_.error_p = FALSE; | |
1950 | htab_traverse_noresize (diff->entries, elf_m68k_merge_gots_1, &arg_); | |
1951 | if (arg_.error_p) | |
1952 | return FALSE; | |
1953 | ||
1954 | /* Merge counters. */ | |
cf869cce NC |
1955 | big->n_slots[R_8] += diff->n_slots[R_8]; |
1956 | big->n_slots[R_16] += diff->n_slots[R_16]; | |
1957 | big->n_slots[R_32] += diff->n_slots[R_32]; | |
1958 | big->local_n_slots += diff->local_n_slots; | |
7fb9f789 NC |
1959 | } |
1960 | else | |
1961 | /* DIFF is empty. */ | |
1962 | { | |
cf869cce NC |
1963 | BFD_ASSERT (diff->n_slots[R_8] == 0); |
1964 | BFD_ASSERT (diff->n_slots[R_16] == 0); | |
1965 | BFD_ASSERT (diff->n_slots[R_32] == 0); | |
1966 | BFD_ASSERT (diff->local_n_slots == 0); | |
7fb9f789 NC |
1967 | } |
1968 | ||
1969 | BFD_ASSERT (!elf_m68k_hash_table (info)->allow_multigot_p | |
cf869cce NC |
1970 | || ((big->n_slots[R_8] |
1971 | <= ELF_M68K_R_8_MAX_N_SLOTS_IN_GOT (info)) | |
1972 | && (big->n_slots[R_16] | |
1973 | <= ELF_M68K_R_8_16_MAX_N_SLOTS_IN_GOT (info)))); | |
7fb9f789 NC |
1974 | |
1975 | return TRUE; | |
1976 | } | |
1977 | ||
1978 | struct elf_m68k_finalize_got_offsets_arg | |
1979 | { | |
cf869cce NC |
1980 | /* Ranges of the offsets for GOT entries. |
1981 | R_x entries receive offsets between offset1[R_x] and offset2[R_x]. | |
1982 | R_x is R_8, R_16 and R_32. */ | |
1983 | bfd_vma *offset1; | |
1984 | bfd_vma *offset2; | |
7fb9f789 NC |
1985 | |
1986 | /* Mapping from global symndx to global symbols. | |
1987 | This is used to build lists of got entries for global symbols. */ | |
1988 | struct elf_m68k_link_hash_entry **symndx2h; | |
cf869cce NC |
1989 | |
1990 | bfd_vma n_ldm_entries; | |
7fb9f789 NC |
1991 | }; |
1992 | ||
1993 | /* Assign ENTRY an offset. Build list of GOT entries for global symbols | |
1994 | along the way. */ | |
1995 | ||
1996 | static int | |
1997 | elf_m68k_finalize_got_offsets_1 (void **entry_ptr, void *_arg) | |
1998 | { | |
1999 | struct elf_m68k_got_entry *entry; | |
2000 | struct elf_m68k_finalize_got_offsets_arg *arg; | |
2001 | ||
cf869cce NC |
2002 | enum elf_m68k_got_offset_size got_offset_size; |
2003 | bfd_vma entry_size; | |
2004 | ||
7fb9f789 NC |
2005 | entry = (struct elf_m68k_got_entry *) *entry_ptr; |
2006 | arg = (struct elf_m68k_finalize_got_offsets_arg *) _arg; | |
2007 | ||
2008 | /* This should be a fresh entry created in elf_m68k_can_merge_gots. */ | |
2009 | BFD_ASSERT (entry->u.s1.refcount == 0); | |
2010 | ||
cf869cce NC |
2011 | /* Get GOT offset size for the entry . */ |
2012 | got_offset_size = elf_m68k_reloc_got_offset_size (entry->key_.type); | |
7fb9f789 | 2013 | |
cf869cce NC |
2014 | /* Calculate entry size in bytes. */ |
2015 | entry_size = 4 * elf_m68k_reloc_got_n_slots (entry->key_.type); | |
7fb9f789 | 2016 | |
cf869cce NC |
2017 | /* Check if we should switch to negative range of the offsets. */ |
2018 | if (arg->offset1[got_offset_size] + entry_size | |
2019 | > arg->offset2[got_offset_size]) | |
2020 | { | |
2021 | /* Verify that this is the only switch to negative range for | |
2022 | got_offset_size. If this assertion fails, then we've miscalculated | |
2023 | range for got_offset_size entries in | |
2024 | elf_m68k_finalize_got_offsets. */ | |
2025 | BFD_ASSERT (arg->offset2[got_offset_size] | |
2026 | != arg->offset2[-(int) got_offset_size - 1]); | |
2027 | ||
2028 | /* Switch. */ | |
2029 | arg->offset1[got_offset_size] = arg->offset1[-(int) got_offset_size - 1]; | |
2030 | arg->offset2[got_offset_size] = arg->offset2[-(int) got_offset_size - 1]; | |
2031 | ||
2032 | /* Verify that now we have enough room for the entry. */ | |
2033 | BFD_ASSERT (arg->offset1[got_offset_size] + entry_size | |
2034 | <= arg->offset2[got_offset_size]); | |
7fb9f789 NC |
2035 | } |
2036 | ||
cf869cce NC |
2037 | /* Assign offset to entry. */ |
2038 | entry->u.s2.offset = arg->offset1[got_offset_size]; | |
2039 | arg->offset1[got_offset_size] += entry_size; | |
2040 | ||
7fb9f789 NC |
2041 | if (entry->key_.bfd == NULL) |
2042 | /* Hook up this entry into the list of got_entries of H. */ | |
2043 | { | |
2044 | struct elf_m68k_link_hash_entry *h; | |
2045 | ||
7fb9f789 | 2046 | h = arg->symndx2h[entry->key_.symndx]; |
cf869cce NC |
2047 | if (h != NULL) |
2048 | { | |
2049 | entry->u.s2.next = h->glist; | |
2050 | h->glist = entry; | |
2051 | } | |
2052 | else | |
2053 | /* This should be the entry for TLS_LDM relocation then. */ | |
2054 | { | |
2055 | BFD_ASSERT ((elf_m68k_reloc_got_type (entry->key_.type) | |
2056 | == R_68K_TLS_LDM32) | |
2057 | && entry->key_.symndx == 0); | |
7fb9f789 | 2058 | |
cf869cce NC |
2059 | ++arg->n_ldm_entries; |
2060 | } | |
7fb9f789 NC |
2061 | } |
2062 | else | |
2063 | /* This entry is for local symbol. */ | |
2064 | entry->u.s2.next = NULL; | |
2065 | ||
2066 | return 1; | |
2067 | } | |
2068 | ||
2069 | /* Assign offsets within GOT. USE_NEG_GOT_OFFSETS_P indicates if we | |
2070 | should use negative offsets. | |
2071 | Build list of GOT entries for global symbols along the way. | |
2072 | SYMNDX2H is mapping from global symbol indices to actual | |
cf869cce NC |
2073 | global symbols. |
2074 | Return offset at which next GOT should start. */ | |
7fb9f789 NC |
2075 | |
2076 | static void | |
2077 | elf_m68k_finalize_got_offsets (struct elf_m68k_got *got, | |
2078 | bfd_boolean use_neg_got_offsets_p, | |
cf869cce NC |
2079 | struct elf_m68k_link_hash_entry **symndx2h, |
2080 | bfd_vma *final_offset, bfd_vma *n_ldm_entries) | |
7fb9f789 NC |
2081 | { |
2082 | struct elf_m68k_finalize_got_offsets_arg arg_; | |
cf869cce NC |
2083 | bfd_vma offset1_[2 * R_LAST]; |
2084 | bfd_vma offset2_[2 * R_LAST]; | |
2085 | int i; | |
2086 | bfd_vma start_offset; | |
7fb9f789 NC |
2087 | |
2088 | BFD_ASSERT (got->offset != (bfd_vma) -1); | |
2089 | ||
2090 | /* We set entry offsets relative to the .got section (and not the | |
2091 | start of a particular GOT), so that we can use them in | |
cf869cce | 2092 | finish_dynamic_symbol without needing to know the GOT which they come |
7fb9f789 NC |
2093 | from. */ |
2094 | ||
cf869cce NC |
2095 | /* Put offset1 in the middle of offset1_, same for offset2. */ |
2096 | arg_.offset1 = offset1_ + R_LAST; | |
2097 | arg_.offset2 = offset2_ + R_LAST; | |
2098 | ||
2099 | start_offset = got->offset; | |
2100 | ||
7fb9f789 | 2101 | if (use_neg_got_offsets_p) |
cf869cce NC |
2102 | /* Setup both negative and positive ranges for R_8, R_16 and R_32. */ |
2103 | i = -(int) R_32 - 1; | |
2104 | else | |
2105 | /* Setup positives ranges for R_8, R_16 and R_32. */ | |
2106 | i = (int) R_8; | |
2107 | ||
2108 | for (; i <= (int) R_32; ++i) | |
7fb9f789 | 2109 | { |
cf869cce | 2110 | int j; |
7fb9f789 NC |
2111 | size_t n; |
2112 | ||
cf869cce NC |
2113 | /* Set beginning of the range of offsets I. */ |
2114 | arg_.offset1[i] = start_offset; | |
7fb9f789 | 2115 | |
cf869cce NC |
2116 | /* Calculate number of slots that require I offsets. */ |
2117 | j = (i >= 0) ? i : -i - 1; | |
2118 | n = (j >= 1) ? got->n_slots[j - 1] : 0; | |
2119 | n = got->n_slots[j] - n; | |
7fb9f789 | 2120 | |
cf869cce NC |
2121 | if (use_neg_got_offsets_p && n != 0) |
2122 | { | |
2123 | if (i < 0) | |
2124 | /* We first fill the positive side of the range, so we might | |
2125 | end up with one empty slot at that side when we can't fit | |
2126 | whole 2-slot entry. Account for that at negative side of | |
2127 | the interval with one additional entry. */ | |
2128 | n = n / 2 + 1; | |
2129 | else | |
2130 | /* When the number of slots is odd, make positive side of the | |
2131 | range one entry bigger. */ | |
2132 | n = (n + 1) / 2; | |
2133 | } | |
2134 | ||
2135 | /* N is the number of slots that require I offsets. | |
2136 | Calculate length of the range for I offsets. */ | |
2137 | n = 4 * n; | |
7fb9f789 | 2138 | |
cf869cce NC |
2139 | /* Set end of the range. */ |
2140 | arg_.offset2[i] = start_offset + n; | |
7fb9f789 | 2141 | |
cf869cce | 2142 | start_offset = arg_.offset2[i]; |
7fb9f789 NC |
2143 | } |
2144 | ||
cf869cce NC |
2145 | if (!use_neg_got_offsets_p) |
2146 | /* Make sure that if we try to switch to negative offsets in | |
2147 | elf_m68k_finalize_got_offsets_1, the assert therein will catch | |
2148 | the bug. */ | |
2149 | for (i = R_8; i <= R_32; ++i) | |
2150 | arg_.offset2[-i - 1] = arg_.offset2[i]; | |
7fb9f789 | 2151 | |
cf869cce NC |
2152 | /* Setup got->offset. offset1[R_8] is either in the middle or at the |
2153 | beginning of GOT depending on use_neg_got_offsets_p. */ | |
2154 | got->offset = arg_.offset1[R_8]; | |
7fb9f789 | 2155 | |
cf869cce NC |
2156 | arg_.symndx2h = symndx2h; |
2157 | arg_.n_ldm_entries = 0; | |
7fb9f789 | 2158 | |
cf869cce NC |
2159 | /* Assign offsets. */ |
2160 | htab_traverse (got->entries, elf_m68k_finalize_got_offsets_1, &arg_); | |
7fb9f789 | 2161 | |
cf869cce NC |
2162 | /* Check offset ranges we have actually assigned. */ |
2163 | for (i = (int) R_8; i <= (int) R_32; ++i) | |
2164 | BFD_ASSERT (arg_.offset2[i] - arg_.offset1[i] <= 4); | |
7fb9f789 | 2165 | |
cf869cce NC |
2166 | *final_offset = start_offset; |
2167 | *n_ldm_entries = arg_.n_ldm_entries; | |
7fb9f789 NC |
2168 | } |
2169 | ||
2170 | struct elf_m68k_partition_multi_got_arg | |
2171 | { | |
2172 | /* The GOT we are adding entries to. Aka big got. */ | |
2173 | struct elf_m68k_got *current_got; | |
2174 | ||
2175 | /* Offset to assign the next CURRENT_GOT. */ | |
2176 | bfd_vma offset; | |
2177 | ||
2178 | /* Context where memory should be allocated. */ | |
2179 | struct bfd_link_info *info; | |
2180 | ||
cf869cce | 2181 | /* Total number of slots in the .got section. |
7fb9f789 | 2182 | This is used to calculate size of the .got and .rela.got sections. */ |
cf869cce | 2183 | bfd_vma n_slots; |
7fb9f789 | 2184 | |
cf869cce NC |
2185 | /* Difference in numbers of allocated slots in the .got section |
2186 | and necessary relocations in the .rela.got section. | |
7fb9f789 | 2187 | This is used to calculate size of the .rela.got section. */ |
cf869cce | 2188 | bfd_vma slots_relas_diff; |
7fb9f789 NC |
2189 | |
2190 | /* Error flag. */ | |
2191 | bfd_boolean error_p; | |
2192 | ||
2193 | /* Mapping from global symndx to global symbols. | |
2194 | This is used to build lists of got entries for global symbols. */ | |
2195 | struct elf_m68k_link_hash_entry **symndx2h; | |
2196 | }; | |
2197 | ||
cf869cce NC |
2198 | static void |
2199 | elf_m68k_partition_multi_got_2 (struct elf_m68k_partition_multi_got_arg *arg) | |
2200 | { | |
2201 | bfd_vma n_ldm_entries; | |
2202 | ||
2203 | elf_m68k_finalize_got_offsets (arg->current_got, | |
2204 | (elf_m68k_hash_table (arg->info) | |
2205 | ->use_neg_got_offsets_p), | |
2206 | arg->symndx2h, | |
2207 | &arg->offset, &n_ldm_entries); | |
2208 | ||
2209 | arg->n_slots += arg->current_got->n_slots[R_32]; | |
2210 | ||
2211 | if (!arg->info->shared) | |
2212 | /* If we are generating a shared object, we need to | |
2213 | output a R_68K_RELATIVE reloc so that the dynamic | |
2214 | linker can adjust this GOT entry. Overwise we | |
2215 | don't need space in .rela.got for local symbols. */ | |
2216 | arg->slots_relas_diff += arg->current_got->local_n_slots; | |
2217 | ||
2218 | /* @LDM relocations require a 2-slot GOT entry, but only | |
2219 | one relocation. Account for that. */ | |
2220 | arg->slots_relas_diff += n_ldm_entries; | |
2221 | ||
2222 | BFD_ASSERT (arg->slots_relas_diff <= arg->n_slots); | |
2223 | } | |
2224 | ||
2225 | ||
7fb9f789 NC |
2226 | /* Process a single BFD2GOT entry and either merge GOT to CURRENT_GOT |
2227 | or start a new CURRENT_GOT. */ | |
2228 | ||
2229 | static int | |
2230 | elf_m68k_partition_multi_got_1 (void **_entry, void *_arg) | |
2231 | { | |
2232 | struct elf_m68k_bfd2got_entry *entry; | |
2233 | struct elf_m68k_partition_multi_got_arg *arg; | |
2234 | struct elf_m68k_got *got; | |
7fb9f789 NC |
2235 | struct elf_m68k_got diff_; |
2236 | struct elf_m68k_got *diff; | |
2237 | ||
2238 | entry = (struct elf_m68k_bfd2got_entry *) *_entry; | |
2239 | arg = (struct elf_m68k_partition_multi_got_arg *) _arg; | |
2240 | ||
2241 | got = entry->got; | |
2242 | BFD_ASSERT (got != NULL); | |
2243 | BFD_ASSERT (got->offset == (bfd_vma) -1); | |
2244 | ||
2245 | diff = NULL; | |
2246 | ||
2247 | if (arg->current_got != NULL) | |
2248 | /* Construct diff. */ | |
2249 | { | |
2250 | diff = &diff_; | |
cf869cce | 2251 | elf_m68k_init_got (diff); |
7fb9f789 NC |
2252 | |
2253 | if (!elf_m68k_can_merge_gots (arg->current_got, got, arg->info, diff)) | |
2254 | { | |
2255 | if (diff->offset == 0) | |
2256 | /* Offset set to 0 in the diff_ indicates an error. */ | |
2257 | { | |
2258 | arg->error_p = TRUE; | |
2259 | goto final_return; | |
2260 | } | |
2261 | ||
2262 | if (elf_m68k_hash_table (arg->info)->allow_multigot_p) | |
2263 | { | |
2264 | elf_m68k_clear_got (diff); | |
cf869cce | 2265 | /* Schedule to finish up current_got and start new one. */ |
7fb9f789 NC |
2266 | diff = NULL; |
2267 | } | |
2268 | /* else | |
2269 | Merge GOTs no matter what. If big GOT overflows, | |
2270 | we'll fail in relocate_section due to truncated relocations. | |
2271 | ||
2272 | ??? May be fail earlier? E.g., in can_merge_gots. */ | |
2273 | } | |
2274 | } | |
2275 | else | |
2276 | /* Diff of got against empty current_got is got itself. */ | |
2277 | { | |
cf869cce | 2278 | /* Create empty current_got to put subsequent GOTs to. */ |
7fb9f789 NC |
2279 | arg->current_got = elf_m68k_create_empty_got (arg->info); |
2280 | if (arg->current_got == NULL) | |
2281 | { | |
2282 | arg->error_p = TRUE; | |
2283 | goto final_return; | |
2284 | } | |
2285 | ||
2286 | arg->current_got->offset = arg->offset; | |
2287 | ||
2288 | diff = got; | |
2289 | } | |
2290 | ||
7fb9f789 NC |
2291 | if (diff != NULL) |
2292 | { | |
cf869cce | 2293 | if (!elf_m68k_merge_gots (arg->current_got, diff, arg->info)) |
7fb9f789 NC |
2294 | { |
2295 | arg->error_p = TRUE; | |
2296 | goto final_return; | |
2297 | } | |
2298 | ||
2299 | /* Now we can free GOT. */ | |
2300 | elf_m68k_clear_got (got); | |
2301 | ||
cf869cce | 2302 | entry->got = arg->current_got; |
7fb9f789 NC |
2303 | } |
2304 | else | |
2305 | { | |
7fb9f789 | 2306 | /* Finish up current_got. */ |
cf869cce | 2307 | elf_m68k_partition_multi_got_2 (arg); |
7fb9f789 | 2308 | |
cf869cce NC |
2309 | /* Schedule to start a new current_got. */ |
2310 | arg->current_got = NULL; | |
7fb9f789 NC |
2311 | |
2312 | /* Retry. */ | |
2313 | if (!elf_m68k_partition_multi_got_1 (_entry, _arg)) | |
2314 | { | |
2315 | BFD_ASSERT (arg->error_p); | |
2316 | goto final_return; | |
2317 | } | |
2318 | } | |
2319 | ||
2320 | final_return: | |
2321 | if (diff != NULL) | |
2322 | elf_m68k_clear_got (diff); | |
2323 | ||
2324 | return arg->error_p == FALSE ? 1 : 0; | |
2325 | } | |
2326 | ||
2327 | /* Helper function to build symndx2h mapping. */ | |
2328 | ||
2329 | static bfd_boolean | |
2330 | elf_m68k_init_symndx2h_1 (struct elf_link_hash_entry *_h, | |
2331 | void *_arg) | |
2332 | { | |
2333 | struct elf_m68k_link_hash_entry *h; | |
2334 | ||
2335 | h = elf_m68k_hash_entry (_h); | |
2336 | ||
2337 | if (h->got_entry_key != 0) | |
2338 | /* H has at least one entry in the GOT. */ | |
2339 | { | |
2340 | struct elf_m68k_partition_multi_got_arg *arg; | |
2341 | ||
2342 | arg = (struct elf_m68k_partition_multi_got_arg *) _arg; | |
2343 | ||
2344 | BFD_ASSERT (arg->symndx2h[h->got_entry_key] == NULL); | |
2345 | arg->symndx2h[h->got_entry_key] = h; | |
2346 | } | |
2347 | ||
2348 | return TRUE; | |
2349 | } | |
2350 | ||
2351 | /* Merge GOTs of some BFDs, assign offsets to GOT entries and build | |
2352 | lists of GOT entries for global symbols. | |
2353 | Calculate sizes of .got and .rela.got sections. */ | |
2354 | ||
2355 | static bfd_boolean | |
2356 | elf_m68k_partition_multi_got (struct bfd_link_info *info) | |
2357 | { | |
2358 | struct elf_m68k_multi_got *multi_got; | |
2359 | struct elf_m68k_partition_multi_got_arg arg_; | |
2360 | ||
2361 | multi_got = elf_m68k_multi_got (info); | |
2362 | ||
2363 | arg_.current_got = NULL; | |
2364 | arg_.offset = 0; | |
2365 | arg_.info = info; | |
cf869cce NC |
2366 | arg_.n_slots = 0; |
2367 | arg_.slots_relas_diff = 0; | |
7fb9f789 NC |
2368 | arg_.error_p = FALSE; |
2369 | ||
2370 | if (multi_got->bfd2got != NULL) | |
2371 | { | |
2372 | /* Initialize symndx2h mapping. */ | |
2373 | { | |
2374 | arg_.symndx2h = bfd_zmalloc (multi_got->global_symndx | |
2375 | * sizeof (*arg_.symndx2h)); | |
2376 | if (arg_.symndx2h == NULL) | |
2377 | return FALSE; | |
2378 | ||
2379 | elf_link_hash_traverse (elf_hash_table (info), | |
2380 | elf_m68k_init_symndx2h_1, &arg_); | |
2381 | } | |
2382 | ||
2383 | /* Partition. */ | |
2384 | htab_traverse (multi_got->bfd2got, elf_m68k_partition_multi_got_1, | |
2385 | &arg_); | |
2386 | if (arg_.error_p) | |
2387 | { | |
2388 | free (arg_.symndx2h); | |
2389 | arg_.symndx2h = NULL; | |
2390 | ||
2391 | return FALSE; | |
2392 | } | |
2393 | ||
2394 | /* Finish up last current_got. */ | |
cf869cce | 2395 | elf_m68k_partition_multi_got_2 (&arg_); |
7fb9f789 NC |
2396 | |
2397 | free (arg_.symndx2h); | |
266abb8f | 2398 | } |
7fb9f789 NC |
2399 | |
2400 | if (elf_hash_table (info)->dynobj != NULL) | |
2401 | /* Set sizes of .got and .rela.got sections. */ | |
266abb8f | 2402 | { |
7fb9f789 | 2403 | asection *s; |
425c6cb0 | 2404 | |
7fb9f789 NC |
2405 | s = bfd_get_section_by_name (elf_hash_table (info)->dynobj, ".got"); |
2406 | if (s != NULL) | |
cf869cce | 2407 | s->size = arg_.offset; |
425c6cb0 | 2408 | else |
cf869cce | 2409 | BFD_ASSERT (arg_.offset == 0); |
425c6cb0 | 2410 | |
cf869cce NC |
2411 | BFD_ASSERT (arg_.slots_relas_diff <= arg_.n_slots); |
2412 | arg_.n_slots -= arg_.slots_relas_diff; | |
7fb9f789 NC |
2413 | |
2414 | s = bfd_get_section_by_name (elf_hash_table (info)->dynobj, ".rela.got"); | |
2415 | if (s != NULL) | |
cf869cce | 2416 | s->size = arg_.n_slots * sizeof (Elf32_External_Rela); |
3bdcfdf4 | 2417 | else |
cf869cce | 2418 | BFD_ASSERT (arg_.n_slots == 0); |
9e1281c7 | 2419 | } |
7fb9f789 NC |
2420 | else |
2421 | BFD_ASSERT (multi_got->bfd2got == NULL); | |
9e1281c7 | 2422 | |
b34976b6 | 2423 | return TRUE; |
9e1281c7 CM |
2424 | } |
2425 | ||
7fb9f789 NC |
2426 | /* Specialized version of elf_m68k_get_got_entry that returns pointer |
2427 | to hashtable slot, thus allowing removal of entry via | |
2428 | elf_m68k_remove_got_entry. */ | |
2429 | ||
2430 | static struct elf_m68k_got_entry ** | |
2431 | elf_m68k_find_got_entry_ptr (struct elf_m68k_got *got, | |
2432 | struct elf_m68k_got_entry_key *key) | |
9e1281c7 | 2433 | { |
7fb9f789 NC |
2434 | void **ptr; |
2435 | struct elf_m68k_got_entry entry_; | |
2436 | struct elf_m68k_got_entry **entry_ptr; | |
9e1281c7 | 2437 | |
7fb9f789 NC |
2438 | entry_.key_ = *key; |
2439 | ptr = htab_find_slot (got->entries, &entry_, NO_INSERT); | |
2440 | BFD_ASSERT (ptr != NULL); | |
9e1281c7 | 2441 | |
7fb9f789 | 2442 | entry_ptr = (struct elf_m68k_got_entry **) ptr; |
9e1281c7 | 2443 | |
7fb9f789 NC |
2444 | return entry_ptr; |
2445 | } | |
9e1281c7 | 2446 | |
7fb9f789 | 2447 | /* Remove entry pointed to by ENTRY_PTR from GOT. */ |
9e1281c7 | 2448 | |
7fb9f789 NC |
2449 | static void |
2450 | elf_m68k_remove_got_entry (struct elf_m68k_got *got, | |
2451 | struct elf_m68k_got_entry **entry_ptr) | |
2452 | { | |
2453 | struct elf_m68k_got_entry *entry; | |
2454 | ||
2455 | entry = *entry_ptr; | |
2456 | ||
2457 | /* Check that offsets have not been finalized yet. */ | |
2458 | BFD_ASSERT (got->offset == (bfd_vma) -1); | |
2459 | /* Check that this entry is indeed unused. */ | |
2460 | BFD_ASSERT (entry->u.s1.refcount == 0); | |
2461 | ||
cf869cce | 2462 | elf_m68k_remove_got_entry_type (got, entry->key_.type); |
7fb9f789 NC |
2463 | |
2464 | if (entry->key_.bfd != NULL) | |
cf869cce NC |
2465 | got->local_n_slots -= elf_m68k_reloc_got_n_slots (entry->key_.type); |
2466 | ||
2467 | BFD_ASSERT (got->n_slots[R_32] >= got->local_n_slots); | |
7fb9f789 NC |
2468 | |
2469 | htab_clear_slot (got->entries, (void **) entry_ptr); | |
2470 | } | |
2471 | ||
2472 | /* Copy any information related to dynamic linking from a pre-existing | |
2473 | symbol to a newly created symbol. Also called to copy flags and | |
2474 | other back-end info to a weakdef, in which case the symbol is not | |
2475 | newly created and plt/got refcounts and dynamic indices should not | |
2476 | be copied. */ | |
2477 | ||
2478 | static void | |
2479 | elf_m68k_copy_indirect_symbol (struct bfd_link_info *info, | |
2480 | struct elf_link_hash_entry *_dir, | |
2481 | struct elf_link_hash_entry *_ind) | |
2482 | { | |
2483 | struct elf_m68k_link_hash_entry *dir; | |
2484 | struct elf_m68k_link_hash_entry *ind; | |
2485 | ||
2486 | _bfd_elf_link_hash_copy_indirect (info, _dir, _ind); | |
2487 | ||
2488 | if (_ind->root.type != bfd_link_hash_indirect) | |
2489 | return; | |
2490 | ||
2491 | dir = elf_m68k_hash_entry (_dir); | |
2492 | ind = elf_m68k_hash_entry (_ind); | |
2493 | ||
e5f2b1de NC |
2494 | /* Any absolute non-dynamic relocations against an indirect or weak |
2495 | definition will be against the target symbol. */ | |
2496 | _dir->non_got_ref |= _ind->non_got_ref; | |
2497 | ||
7fb9f789 NC |
2498 | /* We might have a direct symbol already having entries in the GOTs. |
2499 | Update its key only in case indirect symbol has GOT entries and | |
2500 | assert that both indirect and direct symbols don't have GOT entries | |
2501 | at the same time. */ | |
2502 | if (ind->got_entry_key != 0) | |
266abb8f | 2503 | { |
7fb9f789 NC |
2504 | BFD_ASSERT (dir->got_entry_key == 0); |
2505 | /* Assert that GOTs aren't partioned yet. */ | |
2506 | BFD_ASSERT (ind->glist == NULL); | |
425c6cb0 | 2507 | |
7fb9f789 NC |
2508 | dir->got_entry_key = ind->got_entry_key; |
2509 | ind->got_entry_key = 0; | |
266abb8f | 2510 | } |
9e1281c7 | 2511 | } |
7fb9f789 | 2512 | |
252b5132 RH |
2513 | /* Look through the relocs for a section during the first phase, and |
2514 | allocate space in the global offset table or procedure linkage | |
2515 | table. */ | |
2516 | ||
b34976b6 | 2517 | static bfd_boolean |
252b5132 RH |
2518 | elf_m68k_check_relocs (abfd, info, sec, relocs) |
2519 | bfd *abfd; | |
2520 | struct bfd_link_info *info; | |
2521 | asection *sec; | |
2522 | const Elf_Internal_Rela *relocs; | |
2523 | { | |
2524 | bfd *dynobj; | |
2525 | Elf_Internal_Shdr *symtab_hdr; | |
2526 | struct elf_link_hash_entry **sym_hashes; | |
252b5132 RH |
2527 | const Elf_Internal_Rela *rel; |
2528 | const Elf_Internal_Rela *rel_end; | |
2529 | asection *sgot; | |
2530 | asection *srelgot; | |
2531 | asection *sreloc; | |
7fb9f789 | 2532 | struct elf_m68k_got *got; |
252b5132 | 2533 | |
1049f94e | 2534 | if (info->relocatable) |
b34976b6 | 2535 | return TRUE; |
252b5132 RH |
2536 | |
2537 | dynobj = elf_hash_table (info)->dynobj; | |
2538 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
2539 | sym_hashes = elf_sym_hashes (abfd); | |
252b5132 RH |
2540 | |
2541 | sgot = NULL; | |
2542 | srelgot = NULL; | |
2543 | sreloc = NULL; | |
2544 | ||
7fb9f789 NC |
2545 | got = NULL; |
2546 | ||
252b5132 RH |
2547 | rel_end = relocs + sec->reloc_count; |
2548 | for (rel = relocs; rel < rel_end; rel++) | |
2549 | { | |
2550 | unsigned long r_symndx; | |
2551 | struct elf_link_hash_entry *h; | |
2552 | ||
2553 | r_symndx = ELF32_R_SYM (rel->r_info); | |
2554 | ||
2555 | if (r_symndx < symtab_hdr->sh_info) | |
2556 | h = NULL; | |
2557 | else | |
973a3492 L |
2558 | { |
2559 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
2560 | while (h->root.type == bfd_link_hash_indirect | |
2561 | || h->root.type == bfd_link_hash_warning) | |
2562 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
2563 | } | |
252b5132 RH |
2564 | |
2565 | switch (ELF32_R_TYPE (rel->r_info)) | |
2566 | { | |
2567 | case R_68K_GOT8: | |
2568 | case R_68K_GOT16: | |
2569 | case R_68K_GOT32: | |
2570 | if (h != NULL | |
2571 | && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) | |
2572 | break; | |
2573 | /* Fall through. */ | |
cf869cce NC |
2574 | |
2575 | /* Relative GOT relocations. */ | |
252b5132 RH |
2576 | case R_68K_GOT8O: |
2577 | case R_68K_GOT16O: | |
2578 | case R_68K_GOT32O: | |
cf869cce NC |
2579 | /* Fall through. */ |
2580 | ||
2581 | /* TLS relocations. */ | |
2582 | case R_68K_TLS_GD8: | |
2583 | case R_68K_TLS_GD16: | |
2584 | case R_68K_TLS_GD32: | |
2585 | case R_68K_TLS_LDM8: | |
2586 | case R_68K_TLS_LDM16: | |
2587 | case R_68K_TLS_LDM32: | |
2588 | case R_68K_TLS_IE8: | |
2589 | case R_68K_TLS_IE16: | |
2590 | case R_68K_TLS_IE32: | |
2591 | ||
e5f2b1de NC |
2592 | case R_68K_TLS_TPREL32: |
2593 | case R_68K_TLS_DTPREL32: | |
2594 | ||
2595 | if (ELF32_R_TYPE (rel->r_info) == R_68K_TLS_TPREL32 | |
2596 | && info->shared) | |
2597 | /* Do the special chorus for libraries with static TLS. */ | |
2598 | info->flags |= DF_STATIC_TLS; | |
2599 | ||
252b5132 RH |
2600 | /* This symbol requires a global offset table entry. */ |
2601 | ||
2602 | if (dynobj == NULL) | |
2603 | { | |
2604 | /* Create the .got section. */ | |
2605 | elf_hash_table (info)->dynobj = dynobj = abfd; | |
2606 | if (!_bfd_elf_create_got_section (dynobj, info)) | |
b34976b6 | 2607 | return FALSE; |
252b5132 RH |
2608 | } |
2609 | ||
2610 | if (sgot == NULL) | |
2611 | { | |
2612 | sgot = bfd_get_section_by_name (dynobj, ".got"); | |
2613 | BFD_ASSERT (sgot != NULL); | |
2614 | } | |
2615 | ||
2616 | if (srelgot == NULL | |
2617 | && (h != NULL || info->shared)) | |
2618 | { | |
2619 | srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); | |
2620 | if (srelgot == NULL) | |
2621 | { | |
3496cb2a L |
2622 | srelgot = bfd_make_section_with_flags (dynobj, |
2623 | ".rela.got", | |
2624 | (SEC_ALLOC | |
2625 | | SEC_LOAD | |
2626 | | SEC_HAS_CONTENTS | |
2627 | | SEC_IN_MEMORY | |
2628 | | SEC_LINKER_CREATED | |
2629 | | SEC_READONLY)); | |
252b5132 | 2630 | if (srelgot == NULL |
252b5132 | 2631 | || !bfd_set_section_alignment (dynobj, srelgot, 2)) |
b34976b6 | 2632 | return FALSE; |
252b5132 RH |
2633 | } |
2634 | } | |
2635 | ||
7fb9f789 | 2636 | if (got == NULL) |
252b5132 | 2637 | { |
7fb9f789 | 2638 | struct elf_m68k_bfd2got_entry *bfd2got_entry; |
252b5132 | 2639 | |
7fb9f789 NC |
2640 | bfd2got_entry |
2641 | = elf_m68k_get_bfd2got_entry (elf_m68k_multi_got (info), | |
2642 | abfd, FIND_OR_CREATE, info); | |
2643 | if (bfd2got_entry == NULL) | |
2644 | return FALSE; | |
252b5132 | 2645 | |
7fb9f789 NC |
2646 | got = bfd2got_entry->got; |
2647 | BFD_ASSERT (got != NULL); | |
252b5132 | 2648 | } |
7fb9f789 NC |
2649 | |
2650 | { | |
2651 | struct elf_m68k_got_entry *got_entry; | |
2652 | ||
2653 | /* Add entry to got. */ | |
2654 | got_entry = elf_m68k_add_entry_to_got (got, h, abfd, | |
2655 | ELF32_R_TYPE (rel->r_info), | |
2656 | r_symndx, info); | |
2657 | if (got_entry == NULL) | |
2658 | return FALSE; | |
2659 | ||
2660 | if (got_entry->u.s1.refcount == 1) | |
2661 | { | |
2662 | /* Make sure this symbol is output as a dynamic symbol. */ | |
2663 | if (h != NULL | |
2664 | && h->dynindx == -1 | |
2665 | && !h->forced_local) | |
2666 | { | |
2667 | if (!bfd_elf_link_record_dynamic_symbol (info, h)) | |
2668 | return FALSE; | |
2669 | } | |
7fb9f789 NC |
2670 | } |
2671 | } | |
2672 | ||
252b5132 RH |
2673 | break; |
2674 | ||
2675 | case R_68K_PLT8: | |
2676 | case R_68K_PLT16: | |
2677 | case R_68K_PLT32: | |
2678 | /* This symbol requires a procedure linkage table entry. We | |
2679 | actually build the entry in adjust_dynamic_symbol, | |
2680 | because this might be a case of linking PIC code which is | |
2681 | never referenced by a dynamic object, in which case we | |
2682 | don't need to generate a procedure linkage table entry | |
2683 | after all. */ | |
2684 | ||
2685 | /* If this is a local symbol, we resolve it directly without | |
2686 | creating a procedure linkage table entry. */ | |
2687 | if (h == NULL) | |
2688 | continue; | |
2689 | ||
f5385ebf | 2690 | h->needs_plt = 1; |
51b64d56 | 2691 | h->plt.refcount++; |
252b5132 RH |
2692 | break; |
2693 | ||
2694 | case R_68K_PLT8O: | |
2695 | case R_68K_PLT16O: | |
2696 | case R_68K_PLT32O: | |
2697 | /* This symbol requires a procedure linkage table entry. */ | |
2698 | ||
2699 | if (h == NULL) | |
2700 | { | |
2701 | /* It does not make sense to have this relocation for a | |
2702 | local symbol. FIXME: does it? How to handle it if | |
2703 | it does make sense? */ | |
2704 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 2705 | return FALSE; |
252b5132 RH |
2706 | } |
2707 | ||
2708 | /* Make sure this symbol is output as a dynamic symbol. */ | |
b6152c34 | 2709 | if (h->dynindx == -1 |
f5385ebf | 2710 | && !h->forced_local) |
252b5132 | 2711 | { |
c152c796 | 2712 | if (!bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 2713 | return FALSE; |
252b5132 RH |
2714 | } |
2715 | ||
f5385ebf | 2716 | h->needs_plt = 1; |
51b64d56 | 2717 | h->plt.refcount++; |
252b5132 RH |
2718 | break; |
2719 | ||
2720 | case R_68K_PC8: | |
2721 | case R_68K_PC16: | |
2722 | case R_68K_PC32: | |
2723 | /* If we are creating a shared library and this is not a local | |
2724 | symbol, we need to copy the reloc into the shared library. | |
2725 | However when linking with -Bsymbolic and this is a global | |
2726 | symbol which is defined in an object we are including in the | |
2727 | link (i.e., DEF_REGULAR is set), then we can resolve the | |
2728 | reloc directly. At this point we have not seen all the input | |
2729 | files, so it is possible that DEF_REGULAR is not set now but | |
2730 | will be set later (it is never cleared). We account for that | |
2731 | possibility below by storing information in the | |
2732 | pcrel_relocs_copied field of the hash table entry. */ | |
2733 | if (!(info->shared | |
2734 | && (sec->flags & SEC_ALLOC) != 0 | |
2735 | && h != NULL | |
2736 | && (!info->symbolic | |
b6152c34 | 2737 | || h->root.type == bfd_link_hash_defweak |
f5385ebf | 2738 | || !h->def_regular))) |
252b5132 RH |
2739 | { |
2740 | if (h != NULL) | |
2741 | { | |
2742 | /* Make sure a plt entry is created for this symbol if | |
2743 | it turns out to be a function defined by a dynamic | |
2744 | object. */ | |
51b64d56 | 2745 | h->plt.refcount++; |
252b5132 RH |
2746 | } |
2747 | break; | |
2748 | } | |
2749 | /* Fall through. */ | |
2750 | case R_68K_8: | |
2751 | case R_68K_16: | |
2752 | case R_68K_32: | |
2753 | if (h != NULL) | |
2754 | { | |
2755 | /* Make sure a plt entry is created for this symbol if it | |
2756 | turns out to be a function defined by a dynamic object. */ | |
51b64d56 | 2757 | h->plt.refcount++; |
e5f2b1de NC |
2758 | |
2759 | if (!info->shared) | |
2760 | /* This symbol needs a non-GOT reference. */ | |
2761 | h->non_got_ref = 1; | |
252b5132 RH |
2762 | } |
2763 | ||
2764 | /* If we are creating a shared library, we need to copy the | |
2765 | reloc into the shared library. */ | |
2766 | if (info->shared | |
2767 | && (sec->flags & SEC_ALLOC) != 0) | |
2768 | { | |
2769 | /* When creating a shared object, we must copy these | |
2770 | reloc types into the output file. We create a reloc | |
2771 | section in dynobj and make room for this reloc. */ | |
2772 | if (sreloc == NULL) | |
2773 | { | |
83bac4b0 NC |
2774 | sreloc = _bfd_elf_make_dynamic_reloc_section |
2775 | (sec, dynobj, 2, abfd, /*rela?*/ TRUE); | |
252b5132 | 2776 | |
252b5132 | 2777 | if (sreloc == NULL) |
83bac4b0 | 2778 | return FALSE; |
252b5132 RH |
2779 | } |
2780 | ||
3e829b4a AS |
2781 | if (sec->flags & SEC_READONLY |
2782 | /* Don't set DF_TEXTREL yet for PC relative | |
2783 | relocations, they might be discarded later. */ | |
2784 | && !(ELF32_R_TYPE (rel->r_info) == R_68K_PC8 | |
2785 | || ELF32_R_TYPE (rel->r_info) == R_68K_PC16 | |
2786 | || ELF32_R_TYPE (rel->r_info) == R_68K_PC32)) | |
2787 | info->flags |= DF_TEXTREL; | |
2788 | ||
eea6121a | 2789 | sreloc->size += sizeof (Elf32_External_Rela); |
252b5132 | 2790 | |
b6152c34 AS |
2791 | /* We count the number of PC relative relocations we have |
2792 | entered for this symbol, so that we can discard them | |
2793 | again if, in the -Bsymbolic case, the symbol is later | |
2794 | defined by a regular object, or, in the normal shared | |
2795 | case, the symbol is forced to be local. Note that this | |
2796 | function is only called if we are using an m68kelf linker | |
2797 | hash table, which means that h is really a pointer to an | |
252b5132 | 2798 | elf_m68k_link_hash_entry. */ |
b6152c34 AS |
2799 | if (ELF32_R_TYPE (rel->r_info) == R_68K_PC8 |
2800 | || ELF32_R_TYPE (rel->r_info) == R_68K_PC16 | |
2801 | || ELF32_R_TYPE (rel->r_info) == R_68K_PC32) | |
252b5132 | 2802 | { |
252b5132 | 2803 | struct elf_m68k_pcrel_relocs_copied *p; |
b6152c34 AS |
2804 | struct elf_m68k_pcrel_relocs_copied **head; |
2805 | ||
2806 | if (h != NULL) | |
2807 | { | |
2808 | struct elf_m68k_link_hash_entry *eh | |
0cca5f05 | 2809 | = elf_m68k_hash_entry (h); |
b6152c34 AS |
2810 | head = &eh->pcrel_relocs_copied; |
2811 | } | |
2812 | else | |
2813 | { | |
2814 | asection *s; | |
6edfbbad | 2815 | void *vpp; |
87d72d41 | 2816 | Elf_Internal_Sym *isym; |
6edfbbad | 2817 | |
87d72d41 AM |
2818 | isym = bfd_sym_from_r_symndx (&elf_m68k_hash_table (info)->sym_cache, |
2819 | abfd, r_symndx); | |
2820 | if (isym == NULL) | |
b6152c34 | 2821 | return FALSE; |
252b5132 | 2822 | |
87d72d41 AM |
2823 | s = bfd_section_from_elf_index (abfd, isym->st_shndx); |
2824 | if (s == NULL) | |
2825 | s = sec; | |
2826 | ||
6edfbbad DJ |
2827 | vpp = &elf_section_data (s)->local_dynrel; |
2828 | head = (struct elf_m68k_pcrel_relocs_copied **) vpp; | |
b6152c34 | 2829 | } |
252b5132 | 2830 | |
b6152c34 | 2831 | for (p = *head; p != NULL; p = p->next) |
252b5132 RH |
2832 | if (p->section == sreloc) |
2833 | break; | |
2834 | ||
2835 | if (p == NULL) | |
2836 | { | |
2837 | p = ((struct elf_m68k_pcrel_relocs_copied *) | |
dc810e39 | 2838 | bfd_alloc (dynobj, (bfd_size_type) sizeof *p)); |
252b5132 | 2839 | if (p == NULL) |
b34976b6 | 2840 | return FALSE; |
b6152c34 AS |
2841 | p->next = *head; |
2842 | *head = p; | |
252b5132 RH |
2843 | p->section = sreloc; |
2844 | p->count = 0; | |
2845 | } | |
2846 | ||
2847 | ++p->count; | |
2848 | } | |
2849 | } | |
2850 | ||
2851 | break; | |
2852 | ||
2853 | /* This relocation describes the C++ object vtable hierarchy. | |
2854 | Reconstruct it for later use during GC. */ | |
2855 | case R_68K_GNU_VTINHERIT: | |
c152c796 | 2856 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
b34976b6 | 2857 | return FALSE; |
252b5132 RH |
2858 | break; |
2859 | ||
2860 | /* This relocation describes which C++ vtable entries are actually | |
2861 | used. Record for later use during GC. */ | |
2862 | case R_68K_GNU_VTENTRY: | |
d17e0c6e JB |
2863 | BFD_ASSERT (h != NULL); |
2864 | if (h != NULL | |
2865 | && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) | |
b34976b6 | 2866 | return FALSE; |
252b5132 RH |
2867 | break; |
2868 | ||
2869 | default: | |
2870 | break; | |
2871 | } | |
2872 | } | |
2873 | ||
b34976b6 | 2874 | return TRUE; |
252b5132 RH |
2875 | } |
2876 | ||
2877 | /* Return the section that should be marked against GC for a given | |
2878 | relocation. */ | |
2879 | ||
2880 | static asection * | |
07adf181 AM |
2881 | elf_m68k_gc_mark_hook (asection *sec, |
2882 | struct bfd_link_info *info, | |
2883 | Elf_Internal_Rela *rel, | |
2884 | struct elf_link_hash_entry *h, | |
2885 | Elf_Internal_Sym *sym) | |
252b5132 RH |
2886 | { |
2887 | if (h != NULL) | |
07adf181 AM |
2888 | switch (ELF32_R_TYPE (rel->r_info)) |
2889 | { | |
2890 | case R_68K_GNU_VTINHERIT: | |
2891 | case R_68K_GNU_VTENTRY: | |
2892 | return NULL; | |
2893 | } | |
2894 | ||
2895 | return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); | |
252b5132 RH |
2896 | } |
2897 | ||
2898 | /* Update the got entry reference counts for the section being removed. */ | |
2899 | ||
b34976b6 | 2900 | static bfd_boolean |
07adf181 AM |
2901 | elf_m68k_gc_sweep_hook (bfd *abfd, |
2902 | struct bfd_link_info *info, | |
2903 | asection *sec, | |
2904 | const Elf_Internal_Rela *relocs) | |
252b5132 RH |
2905 | { |
2906 | Elf_Internal_Shdr *symtab_hdr; | |
2907 | struct elf_link_hash_entry **sym_hashes; | |
252b5132 | 2908 | const Elf_Internal_Rela *rel, *relend; |
252b5132 | 2909 | bfd *dynobj; |
dd5724d5 AM |
2910 | asection *sgot; |
2911 | asection *srelgot; | |
7fb9f789 | 2912 | struct elf_m68k_got *got; |
252b5132 | 2913 | |
7dda2462 TG |
2914 | if (info->relocatable) |
2915 | return TRUE; | |
2916 | ||
252b5132 | 2917 | dynobj = elf_hash_table (info)->dynobj; |
dd5724d5 | 2918 | if (dynobj == NULL) |
b34976b6 | 2919 | return TRUE; |
dd5724d5 | 2920 | |
4f075348 KH |
2921 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
2922 | sym_hashes = elf_sym_hashes (abfd); | |
4f075348 | 2923 | |
dd5724d5 AM |
2924 | sgot = bfd_get_section_by_name (dynobj, ".got"); |
2925 | srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); | |
7fb9f789 | 2926 | got = NULL; |
252b5132 RH |
2927 | |
2928 | relend = relocs + sec->reloc_count; | |
2929 | for (rel = relocs; rel < relend; rel++) | |
2930 | { | |
4f075348 | 2931 | unsigned long r_symndx; |
3eb128b2 AM |
2932 | struct elf_link_hash_entry *h = NULL; |
2933 | ||
2934 | r_symndx = ELF32_R_SYM (rel->r_info); | |
2935 | if (r_symndx >= symtab_hdr->sh_info) | |
2936 | { | |
2937 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
2938 | while (h->root.type == bfd_link_hash_indirect | |
2939 | || h->root.type == bfd_link_hash_warning) | |
2940 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
2941 | } | |
4f075348 | 2942 | |
252b5132 RH |
2943 | switch (ELF32_R_TYPE (rel->r_info)) |
2944 | { | |
2945 | case R_68K_GOT8: | |
2946 | case R_68K_GOT16: | |
2947 | case R_68K_GOT32: | |
7fb9f789 NC |
2948 | if (h != NULL |
2949 | && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) | |
2950 | break; | |
2951 | ||
2952 | /* FALLTHRU */ | |
252b5132 RH |
2953 | case R_68K_GOT8O: |
2954 | case R_68K_GOT16O: | |
2955 | case R_68K_GOT32O: | |
cf869cce NC |
2956 | /* Fall through. */ |
2957 | ||
2958 | /* TLS relocations. */ | |
2959 | case R_68K_TLS_GD8: | |
2960 | case R_68K_TLS_GD16: | |
2961 | case R_68K_TLS_GD32: | |
2962 | case R_68K_TLS_LDM8: | |
2963 | case R_68K_TLS_LDM16: | |
2964 | case R_68K_TLS_LDM32: | |
2965 | case R_68K_TLS_IE8: | |
2966 | case R_68K_TLS_IE16: | |
2967 | case R_68K_TLS_IE32: | |
2968 | ||
e5f2b1de NC |
2969 | case R_68K_TLS_TPREL32: |
2970 | case R_68K_TLS_DTPREL32: | |
2971 | ||
7fb9f789 | 2972 | if (got == NULL) |
252b5132 | 2973 | { |
7fb9f789 NC |
2974 | got = elf_m68k_get_bfd2got_entry (elf_m68k_multi_got (info), |
2975 | abfd, MUST_FIND, NULL)->got; | |
2976 | BFD_ASSERT (got != NULL); | |
252b5132 | 2977 | } |
7fb9f789 NC |
2978 | |
2979 | { | |
2980 | struct elf_m68k_got_entry_key key_; | |
2981 | struct elf_m68k_got_entry **got_entry_ptr; | |
2982 | struct elf_m68k_got_entry *got_entry; | |
2983 | ||
cf869cce NC |
2984 | elf_m68k_init_got_entry_key (&key_, h, abfd, r_symndx, |
2985 | ELF32_R_TYPE (rel->r_info)); | |
7fb9f789 NC |
2986 | got_entry_ptr = elf_m68k_find_got_entry_ptr (got, &key_); |
2987 | ||
2988 | got_entry = *got_entry_ptr; | |
2989 | ||
2990 | if (got_entry->u.s1.refcount > 0) | |
2991 | { | |
2992 | --got_entry->u.s1.refcount; | |
2993 | ||
2994 | if (got_entry->u.s1.refcount == 0) | |
2995 | /* We don't need the .got entry any more. */ | |
2996 | elf_m68k_remove_got_entry (got, got_entry_ptr); | |
2997 | } | |
2998 | } | |
252b5132 RH |
2999 | break; |
3000 | ||
3001 | case R_68K_PLT8: | |
3002 | case R_68K_PLT16: | |
3003 | case R_68K_PLT32: | |
3004 | case R_68K_PLT8O: | |
3005 | case R_68K_PLT16O: | |
3006 | case R_68K_PLT32O: | |
3007 | case R_68K_PC8: | |
3008 | case R_68K_PC16: | |
3009 | case R_68K_PC32: | |
3010 | case R_68K_8: | |
3011 | case R_68K_16: | |
3012 | case R_68K_32: | |
3eb128b2 | 3013 | if (h != NULL) |
252b5132 | 3014 | { |
252b5132 RH |
3015 | if (h->plt.refcount > 0) |
3016 | --h->plt.refcount; | |
3017 | } | |
3018 | break; | |
3019 | ||
3020 | default: | |
3021 | break; | |
3022 | } | |
3023 | } | |
3024 | ||
b34976b6 | 3025 | return TRUE; |
252b5132 | 3026 | } |
cc3e26be RS |
3027 | \f |
3028 | /* Return the type of PLT associated with OUTPUT_BFD. */ | |
3029 | ||
3030 | static const struct elf_m68k_plt_info * | |
3031 | elf_m68k_get_plt_info (bfd *output_bfd) | |
3032 | { | |
3033 | unsigned int features; | |
3034 | ||
3035 | features = bfd_m68k_mach_to_features (bfd_get_mach (output_bfd)); | |
3036 | if (features & cpu32) | |
3037 | return &elf_cpu32_plt_info; | |
3038 | if (features & mcfisa_b) | |
3039 | return &elf_isab_plt_info; | |
9a2e615a NS |
3040 | if (features & mcfisa_c) |
3041 | return &elf_isac_plt_info; | |
cc3e26be RS |
3042 | return &elf_m68k_plt_info; |
3043 | } | |
3044 | ||
3045 | /* This function is called after all the input files have been read, | |
3046 | and the input sections have been assigned to output sections. | |
3047 | It's a convenient place to determine the PLT style. */ | |
3048 | ||
3049 | static bfd_boolean | |
3050 | elf_m68k_always_size_sections (bfd *output_bfd, struct bfd_link_info *info) | |
3051 | { | |
7fb9f789 NC |
3052 | /* Bind input BFDs to GOTs and calculate sizes of .got and .rela.got |
3053 | sections. */ | |
3054 | if (!elf_m68k_partition_multi_got (info)) | |
3055 | return FALSE; | |
3056 | ||
cc3e26be RS |
3057 | elf_m68k_hash_table (info)->plt_info = elf_m68k_get_plt_info (output_bfd); |
3058 | return TRUE; | |
3059 | } | |
252b5132 | 3060 | |
252b5132 RH |
3061 | /* Adjust a symbol defined by a dynamic object and referenced by a |
3062 | regular object. The current definition is in some section of the | |
3063 | dynamic object, but we're not including those sections. We have to | |
3064 | change the definition to something the rest of the link can | |
3065 | understand. */ | |
3066 | ||
b34976b6 | 3067 | static bfd_boolean |
252b5132 RH |
3068 | elf_m68k_adjust_dynamic_symbol (info, h) |
3069 | struct bfd_link_info *info; | |
3070 | struct elf_link_hash_entry *h; | |
3071 | { | |
cc3e26be | 3072 | struct elf_m68k_link_hash_table *htab; |
252b5132 RH |
3073 | bfd *dynobj; |
3074 | asection *s; | |
252b5132 | 3075 | |
cc3e26be | 3076 | htab = elf_m68k_hash_table (info); |
252b5132 RH |
3077 | dynobj = elf_hash_table (info)->dynobj; |
3078 | ||
3079 | /* Make sure we know what is going on here. */ | |
3080 | BFD_ASSERT (dynobj != NULL | |
f5385ebf | 3081 | && (h->needs_plt |
f6e332e6 | 3082 | || h->u.weakdef != NULL |
f5385ebf AM |
3083 | || (h->def_dynamic |
3084 | && h->ref_regular | |
3085 | && !h->def_regular))); | |
252b5132 RH |
3086 | |
3087 | /* If this is a function, put it in the procedure linkage table. We | |
3088 | will fill in the contents of the procedure linkage table later, | |
3089 | when we know the address of the .got section. */ | |
3090 | if (h->type == STT_FUNC | |
f5385ebf | 3091 | || h->needs_plt) |
252b5132 | 3092 | { |
9dfe8738 AS |
3093 | if ((h->plt.refcount <= 0 |
3094 | || SYMBOL_CALLS_LOCAL (info, h) | |
3095 | || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
3096 | && h->root.type == bfd_link_hash_undefweak)) | |
252b5132 RH |
3097 | /* We must always create the plt entry if it was referenced |
3098 | by a PLTxxO relocation. In this case we already recorded | |
3099 | it as a dynamic symbol. */ | |
3100 | && h->dynindx == -1) | |
3101 | { | |
3102 | /* This case can occur if we saw a PLTxx reloc in an input | |
3103 | file, but the symbol was never referred to by a dynamic | |
9dfe8738 AS |
3104 | object, or if all references were garbage collected. In |
3105 | such a case, we don't actually need to build a procedure | |
3106 | linkage table, and we can just do a PCxx reloc instead. */ | |
252b5132 | 3107 | h->plt.offset = (bfd_vma) -1; |
f5385ebf | 3108 | h->needs_plt = 0; |
b34976b6 | 3109 | return TRUE; |
252b5132 RH |
3110 | } |
3111 | ||
3112 | /* Make sure this symbol is output as a dynamic symbol. */ | |
b6152c34 | 3113 | if (h->dynindx == -1 |
f5385ebf | 3114 | && !h->forced_local) |
252b5132 | 3115 | { |
c152c796 | 3116 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 3117 | return FALSE; |
252b5132 RH |
3118 | } |
3119 | ||
3120 | s = bfd_get_section_by_name (dynobj, ".plt"); | |
3121 | BFD_ASSERT (s != NULL); | |
3122 | ||
3123 | /* If this is the first .plt entry, make room for the special | |
3124 | first entry. */ | |
eea6121a | 3125 | if (s->size == 0) |
cc3e26be | 3126 | s->size = htab->plt_info->size; |
252b5132 RH |
3127 | |
3128 | /* If this symbol is not defined in a regular file, and we are | |
3129 | not generating a shared library, then set the symbol to this | |
3130 | location in the .plt. This is required to make function | |
3131 | pointers compare as equal between the normal executable and | |
3132 | the shared library. */ | |
3133 | if (!info->shared | |
f5385ebf | 3134 | && !h->def_regular) |
252b5132 RH |
3135 | { |
3136 | h->root.u.def.section = s; | |
eea6121a | 3137 | h->root.u.def.value = s->size; |
252b5132 RH |
3138 | } |
3139 | ||
eea6121a | 3140 | h->plt.offset = s->size; |
252b5132 RH |
3141 | |
3142 | /* Make room for this entry. */ | |
cc3e26be | 3143 | s->size += htab->plt_info->size; |
252b5132 RH |
3144 | |
3145 | /* We also need to make an entry in the .got.plt section, which | |
3146 | will be placed in the .got section by the linker script. */ | |
252b5132 RH |
3147 | s = bfd_get_section_by_name (dynobj, ".got.plt"); |
3148 | BFD_ASSERT (s != NULL); | |
eea6121a | 3149 | s->size += 4; |
252b5132 RH |
3150 | |
3151 | /* We also need to make an entry in the .rela.plt section. */ | |
252b5132 RH |
3152 | s = bfd_get_section_by_name (dynobj, ".rela.plt"); |
3153 | BFD_ASSERT (s != NULL); | |
eea6121a | 3154 | s->size += sizeof (Elf32_External_Rela); |
252b5132 | 3155 | |
b34976b6 | 3156 | return TRUE; |
252b5132 RH |
3157 | } |
3158 | ||
3159 | /* Reinitialize the plt offset now that it is not used as a reference | |
3160 | count any more. */ | |
3161 | h->plt.offset = (bfd_vma) -1; | |
3162 | ||
3163 | /* If this is a weak symbol, and there is a real definition, the | |
3164 | processor independent code will have arranged for us to see the | |
3165 | real definition first, and we can just use the same value. */ | |
f6e332e6 | 3166 | if (h->u.weakdef != NULL) |
252b5132 | 3167 | { |
f6e332e6 AM |
3168 | BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined |
3169 | || h->u.weakdef->root.type == bfd_link_hash_defweak); | |
3170 | h->root.u.def.section = h->u.weakdef->root.u.def.section; | |
3171 | h->root.u.def.value = h->u.weakdef->root.u.def.value; | |
b34976b6 | 3172 | return TRUE; |
252b5132 RH |
3173 | } |
3174 | ||
3175 | /* This is a reference to a symbol defined by a dynamic object which | |
3176 | is not a function. */ | |
3177 | ||
3178 | /* If we are creating a shared library, we must presume that the | |
3179 | only references to the symbol are via the global offset table. | |
3180 | For such cases we need not do anything here; the relocations will | |
3181 | be handled correctly by relocate_section. */ | |
3182 | if (info->shared) | |
b34976b6 | 3183 | return TRUE; |
252b5132 | 3184 | |
e5f2b1de NC |
3185 | /* If there are no references to this symbol that do not use the |
3186 | GOT, we don't need to generate a copy reloc. */ | |
3187 | if (!h->non_got_ref) | |
3188 | return TRUE; | |
3189 | ||
909272ee AM |
3190 | if (h->size == 0) |
3191 | { | |
3192 | (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"), | |
3193 | h->root.root.string); | |
3194 | return TRUE; | |
3195 | } | |
3196 | ||
252b5132 RH |
3197 | /* We must allocate the symbol in our .dynbss section, which will |
3198 | become part of the .bss section of the executable. There will be | |
3199 | an entry for this symbol in the .dynsym section. The dynamic | |
3200 | object will contain position independent code, so all references | |
3201 | from the dynamic object to this symbol will go through the global | |
3202 | offset table. The dynamic linker will use the .dynsym entry to | |
3203 | determine the address it must put in the global offset table, so | |
3204 | both the dynamic object and the regular object will refer to the | |
3205 | same memory location for the variable. */ | |
3206 | ||
3207 | s = bfd_get_section_by_name (dynobj, ".dynbss"); | |
3208 | BFD_ASSERT (s != NULL); | |
3209 | ||
3210 | /* We must generate a R_68K_COPY reloc to tell the dynamic linker to | |
3211 | copy the initial value out of the dynamic object and into the | |
3212 | runtime process image. We need to remember the offset into the | |
3213 | .rela.bss section we are going to use. */ | |
3214 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) | |
3215 | { | |
3216 | asection *srel; | |
3217 | ||
3218 | srel = bfd_get_section_by_name (dynobj, ".rela.bss"); | |
3219 | BFD_ASSERT (srel != NULL); | |
eea6121a | 3220 | srel->size += sizeof (Elf32_External_Rela); |
f5385ebf | 3221 | h->needs_copy = 1; |
252b5132 RH |
3222 | } |
3223 | ||
027297b7 | 3224 | return _bfd_elf_adjust_dynamic_copy (h, s); |
252b5132 RH |
3225 | } |
3226 | ||
3227 | /* Set the sizes of the dynamic sections. */ | |
3228 | ||
b34976b6 | 3229 | static bfd_boolean |
252b5132 | 3230 | elf_m68k_size_dynamic_sections (output_bfd, info) |
aa91b392 | 3231 | bfd *output_bfd ATTRIBUTE_UNUSED; |
252b5132 RH |
3232 | struct bfd_link_info *info; |
3233 | { | |
3234 | bfd *dynobj; | |
3235 | asection *s; | |
b34976b6 AM |
3236 | bfd_boolean plt; |
3237 | bfd_boolean relocs; | |
252b5132 RH |
3238 | |
3239 | dynobj = elf_hash_table (info)->dynobj; | |
3240 | BFD_ASSERT (dynobj != NULL); | |
3241 | ||
3242 | if (elf_hash_table (info)->dynamic_sections_created) | |
3243 | { | |
3244 | /* Set the contents of the .interp section to the interpreter. */ | |
893c4fe2 | 3245 | if (info->executable) |
252b5132 RH |
3246 | { |
3247 | s = bfd_get_section_by_name (dynobj, ".interp"); | |
3248 | BFD_ASSERT (s != NULL); | |
eea6121a | 3249 | s->size = sizeof ELF_DYNAMIC_INTERPRETER; |
252b5132 RH |
3250 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
3251 | } | |
3252 | } | |
3253 | else | |
3254 | { | |
3255 | /* We may have created entries in the .rela.got section. | |
3256 | However, if we are not creating the dynamic sections, we will | |
3257 | not actually use these entries. Reset the size of .rela.got, | |
3258 | which will cause it to get stripped from the output file | |
3259 | below. */ | |
3260 | s = bfd_get_section_by_name (dynobj, ".rela.got"); | |
3261 | if (s != NULL) | |
eea6121a | 3262 | s->size = 0; |
252b5132 RH |
3263 | } |
3264 | ||
b6152c34 AS |
3265 | /* If this is a -Bsymbolic shared link, then we need to discard all |
3266 | PC relative relocs against symbols defined in a regular object. | |
3267 | For the normal shared case we discard the PC relative relocs | |
3268 | against symbols that have become local due to visibility changes. | |
3269 | We allocated space for them in the check_relocs routine, but we | |
3270 | will not fill them in in the relocate_section routine. */ | |
3271 | if (info->shared) | |
0cca5f05 AS |
3272 | elf_link_hash_traverse (elf_hash_table (info), |
3273 | elf_m68k_discard_copies, | |
3274 | (PTR) info); | |
252b5132 RH |
3275 | |
3276 | /* The check_relocs and adjust_dynamic_symbol entry points have | |
3277 | determined the sizes of the various dynamic sections. Allocate | |
3278 | memory for them. */ | |
b34976b6 AM |
3279 | plt = FALSE; |
3280 | relocs = FALSE; | |
252b5132 RH |
3281 | for (s = dynobj->sections; s != NULL; s = s->next) |
3282 | { | |
3283 | const char *name; | |
252b5132 RH |
3284 | |
3285 | if ((s->flags & SEC_LINKER_CREATED) == 0) | |
3286 | continue; | |
3287 | ||
3288 | /* It's OK to base decisions on the section name, because none | |
3289 | of the dynobj section names depend upon the input files. */ | |
3290 | name = bfd_get_section_name (dynobj, s); | |
3291 | ||
252b5132 RH |
3292 | if (strcmp (name, ".plt") == 0) |
3293 | { | |
c456f082 AM |
3294 | /* Remember whether there is a PLT. */ |
3295 | plt = s->size != 0; | |
252b5132 | 3296 | } |
0112cd26 | 3297 | else if (CONST_STRNEQ (name, ".rela")) |
252b5132 | 3298 | { |
c456f082 | 3299 | if (s->size != 0) |
252b5132 | 3300 | { |
b34976b6 | 3301 | relocs = TRUE; |
252b5132 RH |
3302 | |
3303 | /* We use the reloc_count field as a counter if we need | |
3304 | to copy relocs into the output file. */ | |
3305 | s->reloc_count = 0; | |
3306 | } | |
3307 | } | |
0112cd26 | 3308 | else if (! CONST_STRNEQ (name, ".got") |
c456f082 | 3309 | && strcmp (name, ".dynbss") != 0) |
252b5132 RH |
3310 | { |
3311 | /* It's not one of our sections, so don't allocate space. */ | |
3312 | continue; | |
3313 | } | |
3314 | ||
c456f082 | 3315 | if (s->size == 0) |
252b5132 | 3316 | { |
c456f082 AM |
3317 | /* If we don't need this section, strip it from the |
3318 | output file. This is mostly to handle .rela.bss and | |
3319 | .rela.plt. We must create both sections in | |
3320 | create_dynamic_sections, because they must be created | |
3321 | before the linker maps input sections to output | |
3322 | sections. The linker does that before | |
3323 | adjust_dynamic_symbol is called, and it is that | |
3324 | function which decides whether anything needs to go | |
3325 | into these sections. */ | |
8423293d | 3326 | s->flags |= SEC_EXCLUDE; |
252b5132 RH |
3327 | continue; |
3328 | } | |
3329 | ||
c456f082 AM |
3330 | if ((s->flags & SEC_HAS_CONTENTS) == 0) |
3331 | continue; | |
3332 | ||
252b5132 | 3333 | /* Allocate memory for the section contents. */ |
7a9af8c4 NC |
3334 | /* FIXME: This should be a call to bfd_alloc not bfd_zalloc. |
3335 | Unused entries should be reclaimed before the section's contents | |
3336 | are written out, but at the moment this does not happen. Thus in | |
3337 | order to prevent writing out garbage, we initialise the section's | |
3338 | contents to zero. */ | |
eea6121a | 3339 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); |
c456f082 | 3340 | if (s->contents == NULL) |
b34976b6 | 3341 | return FALSE; |
252b5132 RH |
3342 | } |
3343 | ||
3344 | if (elf_hash_table (info)->dynamic_sections_created) | |
3345 | { | |
3346 | /* Add some entries to the .dynamic section. We fill in the | |
3347 | values later, in elf_m68k_finish_dynamic_sections, but we | |
3348 | must add the entries now so that we get the correct size for | |
3349 | the .dynamic section. The DT_DEBUG entry is filled in by the | |
3350 | dynamic linker and used by the debugger. */ | |
dc810e39 | 3351 | #define add_dynamic_entry(TAG, VAL) \ |
5a580b3a | 3352 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) |
dc810e39 | 3353 | |
252b5132 RH |
3354 | if (!info->shared) |
3355 | { | |
dc810e39 | 3356 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
b34976b6 | 3357 | return FALSE; |
252b5132 RH |
3358 | } |
3359 | ||
3360 | if (plt) | |
3361 | { | |
dc810e39 AM |
3362 | if (!add_dynamic_entry (DT_PLTGOT, 0) |
3363 | || !add_dynamic_entry (DT_PLTRELSZ, 0) | |
3364 | || !add_dynamic_entry (DT_PLTREL, DT_RELA) | |
3365 | || !add_dynamic_entry (DT_JMPREL, 0)) | |
b34976b6 | 3366 | return FALSE; |
252b5132 RH |
3367 | } |
3368 | ||
3369 | if (relocs) | |
3370 | { | |
dc810e39 AM |
3371 | if (!add_dynamic_entry (DT_RELA, 0) |
3372 | || !add_dynamic_entry (DT_RELASZ, 0) | |
3373 | || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela))) | |
b34976b6 | 3374 | return FALSE; |
252b5132 RH |
3375 | } |
3376 | ||
aa91b392 | 3377 | if ((info->flags & DF_TEXTREL) != 0) |
252b5132 | 3378 | { |
dc810e39 | 3379 | if (!add_dynamic_entry (DT_TEXTREL, 0)) |
b34976b6 | 3380 | return FALSE; |
252b5132 RH |
3381 | } |
3382 | } | |
dc810e39 | 3383 | #undef add_dynamic_entry |
252b5132 | 3384 | |
b34976b6 | 3385 | return TRUE; |
252b5132 RH |
3386 | } |
3387 | ||
0cca5f05 | 3388 | /* This function is called via elf_link_hash_traverse if we are |
b6152c34 AS |
3389 | creating a shared object. In the -Bsymbolic case it discards the |
3390 | space allocated to copy PC relative relocs against symbols which | |
3e829b4a | 3391 | are defined in regular objects. For the normal shared case, it |
b6152c34 AS |
3392 | discards space for pc-relative relocs that have become local due to |
3393 | symbol visibility changes. We allocated space for them in the | |
3394 | check_relocs routine, but we won't fill them in in the | |
3e829b4a AS |
3395 | relocate_section routine. |
3396 | ||
3397 | We also check whether any of the remaining relocations apply | |
3398 | against a readonly section, and set the DF_TEXTREL flag in this | |
3399 | case. */ | |
252b5132 | 3400 | |
b34976b6 | 3401 | static bfd_boolean |
b6152c34 | 3402 | elf_m68k_discard_copies (h, inf) |
0cca5f05 | 3403 | struct elf_link_hash_entry *h; |
b6152c34 | 3404 | PTR inf; |
252b5132 | 3405 | { |
b6152c34 | 3406 | struct bfd_link_info *info = (struct bfd_link_info *) inf; |
252b5132 RH |
3407 | struct elf_m68k_pcrel_relocs_copied *s; |
3408 | ||
0cca5f05 AS |
3409 | if (h->root.type == bfd_link_hash_warning) |
3410 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
e92d460e | 3411 | |
2516a1ee | 3412 | if (!SYMBOL_CALLS_LOCAL (info, h)) |
3e829b4a AS |
3413 | { |
3414 | if ((info->flags & DF_TEXTREL) == 0) | |
3415 | { | |
3416 | /* Look for relocations against read-only sections. */ | |
0cca5f05 AS |
3417 | for (s = elf_m68k_hash_entry (h)->pcrel_relocs_copied; |
3418 | s != NULL; | |
3419 | s = s->next) | |
3e829b4a AS |
3420 | if ((s->section->flags & SEC_READONLY) != 0) |
3421 | { | |
3422 | info->flags |= DF_TEXTREL; | |
3423 | break; | |
3424 | } | |
3425 | } | |
0cca5f05 | 3426 | |
3e829b4a AS |
3427 | return TRUE; |
3428 | } | |
252b5132 | 3429 | |
0cca5f05 AS |
3430 | for (s = elf_m68k_hash_entry (h)->pcrel_relocs_copied; |
3431 | s != NULL; | |
3432 | s = s->next) | |
eea6121a | 3433 | s->section->size -= s->count * sizeof (Elf32_External_Rela); |
252b5132 | 3434 | |
b34976b6 | 3435 | return TRUE; |
252b5132 RH |
3436 | } |
3437 | ||
cf869cce NC |
3438 | |
3439 | /* Install relocation RELA. */ | |
3440 | ||
3441 | static void | |
3442 | elf_m68k_install_rela (bfd *output_bfd, | |
3443 | asection *srela, | |
3444 | Elf_Internal_Rela *rela) | |
3445 | { | |
3446 | bfd_byte *loc; | |
3447 | ||
3448 | loc = srela->contents; | |
3449 | loc += srela->reloc_count++ * sizeof (Elf32_External_Rela); | |
3450 | bfd_elf32_swap_reloca_out (output_bfd, rela, loc); | |
3451 | } | |
3452 | ||
325e58c7 NC |
3453 | /* Find the base offsets for thread-local storage in this object, |
3454 | for GD/LD and IE/LE respectively. */ | |
3455 | ||
3456 | #define DTP_OFFSET 0x8000 | |
3457 | #define TP_OFFSET 0x7000 | |
cf869cce NC |
3458 | |
3459 | static bfd_vma | |
3460 | dtpoff_base (struct bfd_link_info *info) | |
3461 | { | |
3462 | /* If tls_sec is NULL, we should have signalled an error already. */ | |
3463 | if (elf_hash_table (info)->tls_sec == NULL) | |
3464 | return 0; | |
325e58c7 | 3465 | return elf_hash_table (info)->tls_sec->vma + DTP_OFFSET; |
cf869cce NC |
3466 | } |
3467 | ||
cf869cce | 3468 | static bfd_vma |
325e58c7 | 3469 | tpoff_base (struct bfd_link_info *info) |
cf869cce | 3470 | { |
cf869cce | 3471 | /* If tls_sec is NULL, we should have signalled an error already. */ |
325e58c7 | 3472 | if (elf_hash_table (info)->tls_sec == NULL) |
cf869cce | 3473 | return 0; |
325e58c7 NC |
3474 | return elf_hash_table (info)->tls_sec->vma + TP_OFFSET; |
3475 | } | |
3476 | ||
3477 | /* Output necessary relocation to handle a symbol during static link. | |
3478 | This function is called from elf_m68k_relocate_section. */ | |
3479 | ||
3480 | static void | |
3481 | elf_m68k_init_got_entry_static (struct bfd_link_info *info, | |
3482 | bfd *output_bfd, | |
3483 | enum elf_m68k_reloc_type r_type, | |
3484 | asection *sgot, | |
3485 | bfd_vma got_entry_offset, | |
3486 | bfd_vma relocation) | |
3487 | { | |
3488 | switch (elf_m68k_reloc_got_type (r_type)) | |
3489 | { | |
3490 | case R_68K_GOT32O: | |
3491 | bfd_put_32 (output_bfd, relocation, sgot->contents + got_entry_offset); | |
3492 | break; | |
3493 | ||
3494 | case R_68K_TLS_GD32: | |
3495 | /* We know the offset within the module, | |
3496 | put it into the second GOT slot. */ | |
3497 | bfd_put_32 (output_bfd, relocation - dtpoff_base (info), | |
3498 | sgot->contents + got_entry_offset + 4); | |
3499 | /* FALLTHRU */ | |
3500 | ||
3501 | case R_68K_TLS_LDM32: | |
3502 | /* Mark it as belonging to module 1, the executable. */ | |
3503 | bfd_put_32 (output_bfd, 1, sgot->contents + got_entry_offset); | |
3504 | break; | |
3505 | ||
3506 | case R_68K_TLS_IE32: | |
3507 | bfd_put_32 (output_bfd, relocation - tpoff_base (info), | |
3508 | sgot->contents + got_entry_offset); | |
3509 | break; | |
3510 | ||
3511 | default: | |
3512 | BFD_ASSERT (FALSE); | |
3513 | } | |
3514 | } | |
3515 | ||
3516 | /* Output necessary relocation to handle a local symbol | |
3517 | during dynamic link. | |
3518 | This function is called either from elf_m68k_relocate_section | |
3519 | or from elf_m68k_finish_dynamic_symbol. */ | |
3520 | ||
3521 | static void | |
3522 | elf_m68k_init_got_entry_local_shared (struct bfd_link_info *info, | |
3523 | bfd *output_bfd, | |
3524 | enum elf_m68k_reloc_type r_type, | |
3525 | asection *sgot, | |
3526 | bfd_vma got_entry_offset, | |
3527 | bfd_vma relocation, | |
3528 | asection *srela) | |
3529 | { | |
3530 | Elf_Internal_Rela outrel; | |
3531 | ||
3532 | switch (elf_m68k_reloc_got_type (r_type)) | |
3533 | { | |
3534 | case R_68K_GOT32O: | |
3535 | /* Emit RELATIVE relocation to initialize GOT slot | |
3536 | at run-time. */ | |
3537 | outrel.r_info = ELF32_R_INFO (0, R_68K_RELATIVE); | |
3538 | outrel.r_addend = relocation; | |
3539 | break; | |
3540 | ||
3541 | case R_68K_TLS_GD32: | |
3542 | /* We know the offset within the module, | |
3543 | put it into the second GOT slot. */ | |
3544 | bfd_put_32 (output_bfd, relocation - dtpoff_base (info), | |
3545 | sgot->contents + got_entry_offset + 4); | |
3546 | /* FALLTHRU */ | |
3547 | ||
3548 | case R_68K_TLS_LDM32: | |
3549 | /* We don't know the module number, | |
3550 | create a relocation for it. */ | |
3551 | outrel.r_info = ELF32_R_INFO (0, R_68K_TLS_DTPMOD32); | |
3552 | outrel.r_addend = 0; | |
3553 | break; | |
3554 | ||
3555 | case R_68K_TLS_IE32: | |
3556 | /* Emit TPREL relocation to initialize GOT slot | |
3557 | at run-time. */ | |
3558 | outrel.r_info = ELF32_R_INFO (0, R_68K_TLS_TPREL32); | |
3559 | outrel.r_addend = relocation - elf_hash_table (info)->tls_sec->vma; | |
3560 | break; | |
3561 | ||
3562 | default: | |
3563 | BFD_ASSERT (FALSE); | |
3564 | } | |
3565 | ||
3566 | /* Offset of the GOT entry. */ | |
3567 | outrel.r_offset = (sgot->output_section->vma | |
3568 | + sgot->output_offset | |
3569 | + got_entry_offset); | |
3570 | ||
3571 | /* Install one of the above relocations. */ | |
3572 | elf_m68k_install_rela (output_bfd, srela, &outrel); | |
3573 | ||
3574 | bfd_put_32 (output_bfd, outrel.r_addend, sgot->contents + got_entry_offset); | |
cf869cce NC |
3575 | } |
3576 | ||
252b5132 RH |
3577 | /* Relocate an M68K ELF section. */ |
3578 | ||
b34976b6 | 3579 | static bfd_boolean |
252b5132 RH |
3580 | elf_m68k_relocate_section (output_bfd, info, input_bfd, input_section, |
3581 | contents, relocs, local_syms, local_sections) | |
3582 | bfd *output_bfd; | |
3583 | struct bfd_link_info *info; | |
3584 | bfd *input_bfd; | |
3585 | asection *input_section; | |
3586 | bfd_byte *contents; | |
3587 | Elf_Internal_Rela *relocs; | |
3588 | Elf_Internal_Sym *local_syms; | |
3589 | asection **local_sections; | |
3590 | { | |
3591 | bfd *dynobj; | |
3592 | Elf_Internal_Shdr *symtab_hdr; | |
3593 | struct elf_link_hash_entry **sym_hashes; | |
252b5132 RH |
3594 | asection *sgot; |
3595 | asection *splt; | |
3596 | asection *sreloc; | |
325e58c7 | 3597 | asection *srela; |
7fb9f789 | 3598 | struct elf_m68k_got *got; |
252b5132 RH |
3599 | Elf_Internal_Rela *rel; |
3600 | Elf_Internal_Rela *relend; | |
3601 | ||
3602 | dynobj = elf_hash_table (info)->dynobj; | |
3603 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
3604 | sym_hashes = elf_sym_hashes (input_bfd); | |
252b5132 RH |
3605 | |
3606 | sgot = NULL; | |
3607 | splt = NULL; | |
3608 | sreloc = NULL; | |
325e58c7 | 3609 | srela = NULL; |
252b5132 | 3610 | |
7fb9f789 NC |
3611 | got = NULL; |
3612 | ||
252b5132 RH |
3613 | rel = relocs; |
3614 | relend = relocs + input_section->reloc_count; | |
3615 | for (; rel < relend; rel++) | |
3616 | { | |
3617 | int r_type; | |
3618 | reloc_howto_type *howto; | |
3619 | unsigned long r_symndx; | |
3620 | struct elf_link_hash_entry *h; | |
3621 | Elf_Internal_Sym *sym; | |
3622 | asection *sec; | |
3623 | bfd_vma relocation; | |
44f745a6 | 3624 | bfd_boolean unresolved_reloc; |
252b5132 RH |
3625 | bfd_reloc_status_type r; |
3626 | ||
3627 | r_type = ELF32_R_TYPE (rel->r_info); | |
3628 | if (r_type < 0 || r_type >= (int) R_68K_max) | |
3629 | { | |
3630 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 3631 | return FALSE; |
252b5132 RH |
3632 | } |
3633 | howto = howto_table + r_type; | |
3634 | ||
3635 | r_symndx = ELF32_R_SYM (rel->r_info); | |
3636 | ||
252b5132 RH |
3637 | h = NULL; |
3638 | sym = NULL; | |
3639 | sec = NULL; | |
44f745a6 | 3640 | unresolved_reloc = FALSE; |
560e09e9 | 3641 | |
252b5132 RH |
3642 | if (r_symndx < symtab_hdr->sh_info) |
3643 | { | |
3644 | sym = local_syms + r_symndx; | |
3645 | sec = local_sections[r_symndx]; | |
8517fae7 | 3646 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); |
252b5132 RH |
3647 | } |
3648 | else | |
3649 | { | |
560e09e9 NC |
3650 | bfd_boolean warned; |
3651 | ||
b2a8e766 AM |
3652 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
3653 | r_symndx, symtab_hdr, sym_hashes, | |
3654 | h, sec, relocation, | |
3655 | unresolved_reloc, warned); | |
252b5132 RH |
3656 | } |
3657 | ||
ab96bf03 AM |
3658 | if (sec != NULL && elf_discarded_section (sec)) |
3659 | { | |
3660 | /* For relocs against symbols from removed linkonce sections, | |
3661 | or sections discarded by a linker script, we just want the | |
3662 | section contents zeroed. Avoid any special processing. */ | |
3663 | _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset); | |
3664 | rel->r_info = 0; | |
3665 | rel->r_addend = 0; | |
3666 | continue; | |
3667 | } | |
3668 | ||
3669 | if (info->relocatable) | |
3670 | continue; | |
3671 | ||
252b5132 RH |
3672 | switch (r_type) |
3673 | { | |
3674 | case R_68K_GOT8: | |
3675 | case R_68K_GOT16: | |
3676 | case R_68K_GOT32: | |
3677 | /* Relocation is to the address of the entry for this symbol | |
3678 | in the global offset table. */ | |
3679 | if (h != NULL | |
3680 | && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) | |
7fb9f789 | 3681 | { |
7fb9f789 NC |
3682 | if (elf_m68k_hash_table (info)->local_gp_p) |
3683 | { | |
3684 | bfd_vma sgot_output_offset; | |
3685 | bfd_vma got_offset; | |
3686 | ||
3687 | if (sgot == NULL) | |
3688 | { | |
3689 | sgot = bfd_get_section_by_name (dynobj, ".got"); | |
3690 | ||
3691 | if (sgot != NULL) | |
3692 | sgot_output_offset = sgot->output_offset; | |
3693 | else | |
3694 | /* In this case we have a reference to | |
3695 | _GLOBAL_OFFSET_TABLE_, but the GOT itself is | |
3696 | empty. | |
3697 | ??? Issue a warning? */ | |
3698 | sgot_output_offset = 0; | |
3699 | } | |
3700 | else | |
3701 | sgot_output_offset = sgot->output_offset; | |
3702 | ||
3703 | if (got == NULL) | |
3704 | { | |
3705 | struct elf_m68k_bfd2got_entry *bfd2got_entry; | |
3706 | ||
3707 | bfd2got_entry | |
3708 | = elf_m68k_get_bfd2got_entry (elf_m68k_multi_got (info), | |
3709 | input_bfd, SEARCH, NULL); | |
3710 | ||
3711 | if (bfd2got_entry != NULL) | |
3712 | { | |
3713 | got = bfd2got_entry->got; | |
3714 | BFD_ASSERT (got != NULL); | |
3715 | ||
3716 | got_offset = got->offset; | |
3717 | } | |
3718 | else | |
3719 | /* In this case we have a reference to | |
3720 | _GLOBAL_OFFSET_TABLE_, but no other references | |
3721 | accessing any GOT entries. | |
3722 | ??? Issue a warning? */ | |
3723 | got_offset = 0; | |
3724 | } | |
3725 | else | |
3726 | got_offset = got->offset; | |
3727 | ||
3728 | /* Adjust GOT pointer to point to the GOT | |
3729 | assigned to input_bfd. */ | |
f57718b4 | 3730 | rel->r_addend += sgot_output_offset + got_offset; |
7fb9f789 NC |
3731 | } |
3732 | else | |
3733 | BFD_ASSERT (got == NULL || got->offset == 0); | |
3734 | ||
3735 | break; | |
3736 | } | |
252b5132 RH |
3737 | /* Fall through. */ |
3738 | case R_68K_GOT8O: | |
3739 | case R_68K_GOT16O: | |
3740 | case R_68K_GOT32O: | |
cf869cce NC |
3741 | |
3742 | case R_68K_TLS_LDM32: | |
3743 | case R_68K_TLS_LDM16: | |
3744 | case R_68K_TLS_LDM8: | |
3745 | ||
3746 | case R_68K_TLS_GD8: | |
3747 | case R_68K_TLS_GD16: | |
3748 | case R_68K_TLS_GD32: | |
3749 | ||
3750 | case R_68K_TLS_IE8: | |
3751 | case R_68K_TLS_IE16: | |
3752 | case R_68K_TLS_IE32: | |
3753 | ||
252b5132 RH |
3754 | /* Relocation is the offset of the entry for this symbol in |
3755 | the global offset table. */ | |
3756 | ||
3757 | { | |
7fb9f789 NC |
3758 | struct elf_m68k_got_entry_key key_; |
3759 | bfd_vma *off_ptr; | |
252b5132 RH |
3760 | bfd_vma off; |
3761 | ||
3762 | if (sgot == NULL) | |
3763 | { | |
3764 | sgot = bfd_get_section_by_name (dynobj, ".got"); | |
3765 | BFD_ASSERT (sgot != NULL); | |
3766 | } | |
3767 | ||
7fb9f789 NC |
3768 | if (got == NULL) |
3769 | { | |
3770 | got = elf_m68k_get_bfd2got_entry (elf_m68k_multi_got (info), | |
3771 | input_bfd, MUST_FIND, | |
3772 | NULL)->got; | |
3773 | BFD_ASSERT (got != NULL); | |
3774 | } | |
3775 | ||
3776 | /* Get GOT offset for this symbol. */ | |
cf869cce NC |
3777 | elf_m68k_init_got_entry_key (&key_, h, input_bfd, r_symndx, |
3778 | r_type); | |
7fb9f789 NC |
3779 | off_ptr = &elf_m68k_get_got_entry (got, &key_, MUST_FIND, |
3780 | NULL)->u.s2.offset; | |
3781 | off = *off_ptr; | |
3782 | ||
cf869cce NC |
3783 | /* The offset must always be a multiple of 4. We use |
3784 | the least significant bit to record whether we have | |
3785 | already generated the necessary reloc. */ | |
3786 | if ((off & 1) != 0) | |
3787 | off &= ~1; | |
3788 | else | |
252b5132 | 3789 | { |
cf869cce NC |
3790 | if (h != NULL |
3791 | /* @TLSLDM relocations are bounded to the module, in | |
3792 | which the symbol is defined -- not to the symbol | |
3793 | itself. */ | |
3794 | && elf_m68k_reloc_got_type (r_type) != R_68K_TLS_LDM32) | |
252b5132 | 3795 | { |
cf869cce NC |
3796 | bfd_boolean dyn; |
3797 | ||
3798 | dyn = elf_hash_table (info)->dynamic_sections_created; | |
3799 | if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) | |
3800 | || (info->shared | |
3801 | && SYMBOL_REFERENCES_LOCAL (info, h)) | |
3802 | || (ELF_ST_VISIBILITY (h->other) | |
3803 | && h->root.type == bfd_link_hash_undefweak)) | |
252b5132 | 3804 | { |
cf869cce NC |
3805 | /* This is actually a static link, or it is a |
3806 | -Bsymbolic link and the symbol is defined | |
3807 | locally, or the symbol was forced to be local | |
325e58c7 | 3808 | because of a version file. We must initialize |
cf869cce NC |
3809 | this entry in the global offset table. Since |
3810 | the offset must always be a multiple of 4, we | |
3811 | use the least significant bit to record whether | |
3812 | we have initialized it already. | |
3813 | ||
3814 | When doing a dynamic link, we create a .rela.got | |
3815 | relocation entry to initialize the value. This | |
3816 | is done in the finish_dynamic_symbol routine. */ | |
3817 | ||
325e58c7 NC |
3818 | elf_m68k_init_got_entry_static (info, |
3819 | output_bfd, | |
3820 | r_type, | |
3821 | sgot, | |
3822 | off, | |
3823 | relocation); | |
cf869cce | 3824 | |
7fb9f789 | 3825 | *off_ptr |= 1; |
252b5132 | 3826 | } |
cf869cce NC |
3827 | else |
3828 | unresolved_reloc = FALSE; | |
252b5132 | 3829 | } |
cf869cce | 3830 | else if (info->shared) /* && h == NULL */ |
325e58c7 | 3831 | /* Process local symbol during dynamic link. */ |
252b5132 | 3832 | { |
325e58c7 | 3833 | if (srela == NULL) |
252b5132 | 3834 | { |
325e58c7 NC |
3835 | srela = bfd_get_section_by_name (dynobj, ".rela.got"); |
3836 | BFD_ASSERT (srela != NULL); | |
cf869cce | 3837 | } |
cf869cce | 3838 | |
325e58c7 NC |
3839 | elf_m68k_init_got_entry_local_shared (info, |
3840 | output_bfd, | |
3841 | r_type, | |
3842 | sgot, | |
3843 | off, | |
3844 | relocation, | |
3845 | srela); | |
cf869cce NC |
3846 | |
3847 | *off_ptr |= 1; | |
3848 | } | |
3849 | else /* h == NULL && !info->shared */ | |
3850 | { | |
325e58c7 NC |
3851 | elf_m68k_init_got_entry_static (info, |
3852 | output_bfd, | |
3853 | r_type, | |
3854 | sgot, | |
3855 | off, | |
3856 | relocation); | |
252b5132 | 3857 | |
7fb9f789 | 3858 | *off_ptr |= 1; |
252b5132 RH |
3859 | } |
3860 | } | |
3861 | ||
cf869cce NC |
3862 | /* We don't use elf_m68k_reloc_got_type in the condition below |
3863 | because this is the only place where difference between | |
3864 | R_68K_GOTx and R_68K_GOTxO relocations matters. */ | |
3865 | if (r_type == R_68K_GOT32O | |
252b5132 | 3866 | || r_type == R_68K_GOT16O |
cf869cce NC |
3867 | || r_type == R_68K_GOT8O |
3868 | || elf_m68k_reloc_got_type (r_type) == R_68K_TLS_GD32 | |
3869 | || elf_m68k_reloc_got_type (r_type) == R_68K_TLS_LDM32 | |
3870 | || elf_m68k_reloc_got_type (r_type) == R_68K_TLS_IE32) | |
252b5132 | 3871 | { |
7fb9f789 NC |
3872 | /* GOT pointer is adjusted to point to the start/middle |
3873 | of local GOT. Adjust the offset accordingly. */ | |
3874 | BFD_ASSERT (elf_m68k_hash_table (info)->use_neg_got_offsets_p | |
3875 | || off >= got->offset); | |
3876 | ||
3877 | if (elf_m68k_hash_table (info)->local_gp_p) | |
3878 | relocation = off - got->offset; | |
3879 | else | |
3880 | { | |
3881 | BFD_ASSERT (got->offset == 0); | |
3882 | relocation = sgot->output_offset + off; | |
3883 | } | |
3884 | ||
252b5132 RH |
3885 | /* This relocation does not use the addend. */ |
3886 | rel->r_addend = 0; | |
3887 | } | |
3888 | else | |
7fb9f789 NC |
3889 | relocation = (sgot->output_section->vma + sgot->output_offset |
3890 | + off); | |
252b5132 RH |
3891 | } |
3892 | break; | |
3893 | ||
cf869cce NC |
3894 | case R_68K_TLS_LDO32: |
3895 | case R_68K_TLS_LDO16: | |
3896 | case R_68K_TLS_LDO8: | |
3897 | relocation -= dtpoff_base (info); | |
3898 | break; | |
3899 | ||
3900 | case R_68K_TLS_LE32: | |
3901 | case R_68K_TLS_LE16: | |
3902 | case R_68K_TLS_LE8: | |
3903 | if (info->shared) | |
3904 | { | |
3905 | (*_bfd_error_handler) | |
3906 | (_("%B(%A+0x%lx): R_68K_TLS_LE32 relocation not permitted " | |
3907 | "in shared object"), | |
3908 | input_bfd, input_section, (long) rel->r_offset, howto->name); | |
3909 | ||
3910 | return FALSE; | |
3911 | } | |
3912 | else | |
325e58c7 | 3913 | relocation -= tpoff_base (info); |
cf869cce NC |
3914 | |
3915 | break; | |
3916 | ||
252b5132 RH |
3917 | case R_68K_PLT8: |
3918 | case R_68K_PLT16: | |
3919 | case R_68K_PLT32: | |
3920 | /* Relocation is to the entry for this symbol in the | |
3921 | procedure linkage table. */ | |
3922 | ||
3923 | /* Resolve a PLTxx reloc against a local symbol directly, | |
3924 | without using the procedure linkage table. */ | |
3925 | if (h == NULL) | |
3926 | break; | |
3927 | ||
3928 | if (h->plt.offset == (bfd_vma) -1 | |
3929 | || !elf_hash_table (info)->dynamic_sections_created) | |
3930 | { | |
3931 | /* We didn't make a PLT entry for this symbol. This | |
3932 | happens when statically linking PIC code, or when | |
3933 | using -Bsymbolic. */ | |
3934 | break; | |
3935 | } | |
3936 | ||
3937 | if (splt == NULL) | |
3938 | { | |
3939 | splt = bfd_get_section_by_name (dynobj, ".plt"); | |
3940 | BFD_ASSERT (splt != NULL); | |
3941 | } | |
3942 | ||
3943 | relocation = (splt->output_section->vma | |
3944 | + splt->output_offset | |
3945 | + h->plt.offset); | |
44f745a6 | 3946 | unresolved_reloc = FALSE; |
252b5132 RH |
3947 | break; |
3948 | ||
3949 | case R_68K_PLT8O: | |
3950 | case R_68K_PLT16O: | |
3951 | case R_68K_PLT32O: | |
3952 | /* Relocation is the offset of the entry for this symbol in | |
3953 | the procedure linkage table. */ | |
3954 | BFD_ASSERT (h != NULL && h->plt.offset != (bfd_vma) -1); | |
3955 | ||
3956 | if (splt == NULL) | |
3957 | { | |
3958 | splt = bfd_get_section_by_name (dynobj, ".plt"); | |
3959 | BFD_ASSERT (splt != NULL); | |
3960 | } | |
3961 | ||
3962 | relocation = h->plt.offset; | |
44f745a6 | 3963 | unresolved_reloc = FALSE; |
252b5132 RH |
3964 | |
3965 | /* This relocation does not use the addend. */ | |
3966 | rel->r_addend = 0; | |
3967 | ||
3968 | break; | |
3969 | ||
252b5132 RH |
3970 | case R_68K_8: |
3971 | case R_68K_16: | |
3972 | case R_68K_32: | |
2516a1ee AS |
3973 | case R_68K_PC8: |
3974 | case R_68K_PC16: | |
3975 | case R_68K_PC32: | |
252b5132 | 3976 | if (info->shared |
ec338859 | 3977 | && r_symndx != 0 |
252b5132 | 3978 | && (input_section->flags & SEC_ALLOC) != 0 |
d2ff124f AS |
3979 | && (h == NULL |
3980 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
3981 | || h->root.type != bfd_link_hash_undefweak) | |
252b5132 RH |
3982 | && ((r_type != R_68K_PC8 |
3983 | && r_type != R_68K_PC16 | |
3984 | && r_type != R_68K_PC32) | |
2516a1ee | 3985 | || !SYMBOL_CALLS_LOCAL (info, h))) |
252b5132 RH |
3986 | { |
3987 | Elf_Internal_Rela outrel; | |
947216bf | 3988 | bfd_byte *loc; |
b34976b6 | 3989 | bfd_boolean skip, relocate; |
252b5132 RH |
3990 | |
3991 | /* When generating a shared object, these relocations | |
3992 | are copied into the output file to be resolved at run | |
3993 | time. */ | |
3994 | ||
b34976b6 AM |
3995 | skip = FALSE; |
3996 | relocate = FALSE; | |
252b5132 | 3997 | |
c629eae0 JJ |
3998 | outrel.r_offset = |
3999 | _bfd_elf_section_offset (output_bfd, info, input_section, | |
4000 | rel->r_offset); | |
4001 | if (outrel.r_offset == (bfd_vma) -1) | |
b34976b6 | 4002 | skip = TRUE; |
0bb2d96a | 4003 | else if (outrel.r_offset == (bfd_vma) -2) |
b34976b6 | 4004 | skip = TRUE, relocate = TRUE; |
252b5132 RH |
4005 | outrel.r_offset += (input_section->output_section->vma |
4006 | + input_section->output_offset); | |
4007 | ||
4008 | if (skip) | |
0bb2d96a | 4009 | memset (&outrel, 0, sizeof outrel); |
252b5132 | 4010 | else if (h != NULL |
d2ff124f AS |
4011 | && h->dynindx != -1 |
4012 | && (r_type == R_68K_PC8 | |
4013 | || r_type == R_68K_PC16 | |
4014 | || r_type == R_68K_PC32 | |
4015 | || !info->shared | |
4016 | || !info->symbolic | |
f5385ebf | 4017 | || !h->def_regular)) |
252b5132 | 4018 | { |
252b5132 | 4019 | outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); |
d2ff124f | 4020 | outrel.r_addend = rel->r_addend; |
252b5132 RH |
4021 | } |
4022 | else | |
4023 | { | |
d2ff124f | 4024 | /* This symbol is local, or marked to become local. */ |
74541ad4 AM |
4025 | outrel.r_addend = relocation + rel->r_addend; |
4026 | ||
252b5132 RH |
4027 | if (r_type == R_68K_32) |
4028 | { | |
b34976b6 | 4029 | relocate = TRUE; |
252b5132 | 4030 | outrel.r_info = ELF32_R_INFO (0, R_68K_RELATIVE); |
252b5132 RH |
4031 | } |
4032 | else | |
4033 | { | |
4034 | long indx; | |
4035 | ||
8517fae7 | 4036 | if (bfd_is_abs_section (sec)) |
252b5132 RH |
4037 | indx = 0; |
4038 | else if (sec == NULL || sec->owner == NULL) | |
4039 | { | |
4040 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 4041 | return FALSE; |
252b5132 RH |
4042 | } |
4043 | else | |
4044 | { | |
4045 | asection *osec; | |
4046 | ||
74541ad4 AM |
4047 | /* We are turning this relocation into one |
4048 | against a section symbol. It would be | |
4049 | proper to subtract the symbol's value, | |
4050 | osec->vma, from the emitted reloc addend, | |
4051 | but ld.so expects buggy relocs. */ | |
252b5132 RH |
4052 | osec = sec->output_section; |
4053 | indx = elf_section_data (osec)->dynindx; | |
74541ad4 AM |
4054 | if (indx == 0) |
4055 | { | |
4056 | struct elf_link_hash_table *htab; | |
4057 | htab = elf_hash_table (info); | |
4058 | osec = htab->text_index_section; | |
4059 | indx = elf_section_data (osec)->dynindx; | |
4060 | } | |
4061 | BFD_ASSERT (indx != 0); | |
252b5132 RH |
4062 | } |
4063 | ||
252b5132 | 4064 | outrel.r_info = ELF32_R_INFO (indx, r_type); |
252b5132 RH |
4065 | } |
4066 | } | |
4067 | ||
d2ff124f AS |
4068 | sreloc = elf_section_data (input_section)->sreloc; |
4069 | if (sreloc == NULL) | |
4070 | abort (); | |
4071 | ||
947216bf AM |
4072 | loc = sreloc->contents; |
4073 | loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela); | |
4074 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); | |
252b5132 RH |
4075 | |
4076 | /* This reloc will be computed at runtime, so there's no | |
4077 | need to do anything now, except for R_68K_32 | |
4078 | relocations that have been turned into | |
4079 | R_68K_RELATIVE. */ | |
4080 | if (!relocate) | |
4081 | continue; | |
4082 | } | |
4083 | ||
4084 | break; | |
4085 | ||
4086 | case R_68K_GNU_VTINHERIT: | |
4087 | case R_68K_GNU_VTENTRY: | |
4088 | /* These are no-ops in the end. */ | |
4089 | continue; | |
4090 | ||
4091 | default: | |
4092 | break; | |
4093 | } | |
4094 | ||
44f745a6 AS |
4095 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections |
4096 | because such sections are not SEC_ALLOC and thus ld.so will | |
4097 | not process them. */ | |
4098 | if (unresolved_reloc | |
4099 | && !((input_section->flags & SEC_DEBUGGING) != 0 | |
f5385ebf | 4100 | && h->def_dynamic)) |
44f745a6 AS |
4101 | { |
4102 | (*_bfd_error_handler) | |
843fe662 | 4103 | (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"), |
d003868e AM |
4104 | input_bfd, |
4105 | input_section, | |
44f745a6 | 4106 | (long) rel->r_offset, |
843fe662 | 4107 | howto->name, |
44f745a6 AS |
4108 | h->root.root.string); |
4109 | return FALSE; | |
4110 | } | |
4111 | ||
cf869cce NC |
4112 | if (r_symndx != 0 |
4113 | && r_type != R_68K_NONE | |
4114 | && (h == NULL | |
4115 | || h->root.type == bfd_link_hash_defined | |
4116 | || h->root.type == bfd_link_hash_defweak)) | |
4117 | { | |
4118 | char sym_type; | |
4119 | ||
4120 | sym_type = (sym != NULL) ? ELF32_ST_TYPE (sym->st_info) : h->type; | |
4121 | ||
4122 | if (elf_m68k_reloc_tls_p (r_type) != (sym_type == STT_TLS)) | |
4123 | { | |
4124 | const char *name; | |
4125 | ||
4126 | if (h != NULL) | |
4127 | name = h->root.root.string; | |
4128 | else | |
4129 | { | |
4130 | name = (bfd_elf_string_from_elf_section | |
4131 | (input_bfd, symtab_hdr->sh_link, sym->st_name)); | |
4132 | if (name == NULL || *name == '\0') | |
4133 | name = bfd_section_name (input_bfd, sec); | |
4134 | } | |
4135 | ||
4136 | (*_bfd_error_handler) | |
4137 | ((sym_type == STT_TLS | |
4138 | ? _("%B(%A+0x%lx): %s used with TLS symbol %s") | |
4139 | : _("%B(%A+0x%lx): %s used with non-TLS symbol %s")), | |
4140 | input_bfd, | |
4141 | input_section, | |
4142 | (long) rel->r_offset, | |
4143 | howto->name, | |
4144 | name); | |
4145 | } | |
4146 | } | |
4147 | ||
252b5132 RH |
4148 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
4149 | contents, rel->r_offset, | |
4150 | relocation, rel->r_addend); | |
4151 | ||
4152 | if (r != bfd_reloc_ok) | |
4153 | { | |
44f745a6 AS |
4154 | const char *name; |
4155 | ||
4156 | if (h != NULL) | |
4157 | name = h->root.root.string; | |
4158 | else | |
252b5132 | 4159 | { |
44f745a6 AS |
4160 | name = bfd_elf_string_from_elf_section (input_bfd, |
4161 | symtab_hdr->sh_link, | |
4162 | sym->st_name); | |
4163 | if (name == NULL) | |
4164 | return FALSE; | |
4165 | if (*name == '\0') | |
4166 | name = bfd_section_name (input_bfd, sec); | |
4167 | } | |
252b5132 | 4168 | |
44f745a6 AS |
4169 | if (r == bfd_reloc_overflow) |
4170 | { | |
4171 | if (!(info->callbacks->reloc_overflow | |
dfeffb9f L |
4172 | (info, (h ? &h->root : NULL), name, howto->name, |
4173 | (bfd_vma) 0, input_bfd, input_section, | |
4174 | rel->r_offset))) | |
44f745a6 AS |
4175 | return FALSE; |
4176 | } | |
4177 | else | |
4178 | { | |
4179 | (*_bfd_error_handler) | |
d003868e AM |
4180 | (_("%B(%A+0x%lx): reloc against `%s': error %d"), |
4181 | input_bfd, input_section, | |
44f745a6 AS |
4182 | (long) rel->r_offset, name, (int) r); |
4183 | return FALSE; | |
252b5132 RH |
4184 | } |
4185 | } | |
4186 | } | |
4187 | ||
b34976b6 | 4188 | return TRUE; |
252b5132 RH |
4189 | } |
4190 | ||
cc3e26be RS |
4191 | /* Install an M_68K_PC32 relocation against VALUE at offset OFFSET |
4192 | into section SEC. */ | |
4193 | ||
4194 | static void | |
4195 | elf_m68k_install_pc32 (asection *sec, bfd_vma offset, bfd_vma value) | |
4196 | { | |
4197 | /* Make VALUE PC-relative. */ | |
4198 | value -= sec->output_section->vma + offset; | |
4199 | ||
4200 | /* Apply any in-place addend. */ | |
4201 | value += bfd_get_32 (sec->owner, sec->contents + offset); | |
4202 | ||
4203 | bfd_put_32 (sec->owner, value, sec->contents + offset); | |
4204 | } | |
4205 | ||
252b5132 RH |
4206 | /* Finish up dynamic symbol handling. We set the contents of various |
4207 | dynamic sections here. */ | |
4208 | ||
b34976b6 | 4209 | static bfd_boolean |
252b5132 RH |
4210 | elf_m68k_finish_dynamic_symbol (output_bfd, info, h, sym) |
4211 | bfd *output_bfd; | |
4212 | struct bfd_link_info *info; | |
4213 | struct elf_link_hash_entry *h; | |
4214 | Elf_Internal_Sym *sym; | |
4215 | { | |
4216 | bfd *dynobj; | |
4217 | ||
4218 | dynobj = elf_hash_table (info)->dynobj; | |
4219 | ||
4220 | if (h->plt.offset != (bfd_vma) -1) | |
4221 | { | |
cc3e26be | 4222 | const struct elf_m68k_plt_info *plt_info; |
252b5132 RH |
4223 | asection *splt; |
4224 | asection *sgot; | |
4225 | asection *srela; | |
4226 | bfd_vma plt_index; | |
4227 | bfd_vma got_offset; | |
4228 | Elf_Internal_Rela rela; | |
947216bf | 4229 | bfd_byte *loc; |
252b5132 RH |
4230 | |
4231 | /* This symbol has an entry in the procedure linkage table. Set | |
4232 | it up. */ | |
4233 | ||
4234 | BFD_ASSERT (h->dynindx != -1); | |
4235 | ||
cc3e26be | 4236 | plt_info = elf_m68k_hash_table (info)->plt_info; |
252b5132 RH |
4237 | splt = bfd_get_section_by_name (dynobj, ".plt"); |
4238 | sgot = bfd_get_section_by_name (dynobj, ".got.plt"); | |
4239 | srela = bfd_get_section_by_name (dynobj, ".rela.plt"); | |
4240 | BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL); | |
4241 | ||
4242 | /* Get the index in the procedure linkage table which | |
4243 | corresponds to this symbol. This is the index of this symbol | |
4244 | in all the symbols for which we are making plt entries. The | |
4245 | first entry in the procedure linkage table is reserved. */ | |
cc3e26be | 4246 | plt_index = (h->plt.offset / plt_info->size) - 1; |
252b5132 RH |
4247 | |
4248 | /* Get the offset into the .got table of the entry that | |
4249 | corresponds to this function. Each .got entry is 4 bytes. | |
4250 | The first three are reserved. */ | |
4251 | got_offset = (plt_index + 3) * 4; | |
4252 | ||
cc3e26be RS |
4253 | memcpy (splt->contents + h->plt.offset, |
4254 | plt_info->symbol_entry, | |
4255 | plt_info->size); | |
4256 | ||
4257 | elf_m68k_install_pc32 (splt, h->plt.offset + plt_info->symbol_relocs.got, | |
4258 | (sgot->output_section->vma | |
4259 | + sgot->output_offset | |
4260 | + got_offset)); | |
252b5132 RH |
4261 | |
4262 | bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela), | |
cc3e26be RS |
4263 | splt->contents |
4264 | + h->plt.offset | |
4265 | + plt_info->symbol_resolve_entry + 2); | |
4266 | ||
4267 | elf_m68k_install_pc32 (splt, h->plt.offset + plt_info->symbol_relocs.plt, | |
4268 | splt->output_section->vma); | |
252b5132 RH |
4269 | |
4270 | /* Fill in the entry in the global offset table. */ | |
4271 | bfd_put_32 (output_bfd, | |
4272 | (splt->output_section->vma | |
4273 | + splt->output_offset | |
4274 | + h->plt.offset | |
cc3e26be | 4275 | + plt_info->symbol_resolve_entry), |
252b5132 RH |
4276 | sgot->contents + got_offset); |
4277 | ||
4278 | /* Fill in the entry in the .rela.plt section. */ | |
4279 | rela.r_offset = (sgot->output_section->vma | |
4280 | + sgot->output_offset | |
4281 | + got_offset); | |
4282 | rela.r_info = ELF32_R_INFO (h->dynindx, R_68K_JMP_SLOT); | |
4283 | rela.r_addend = 0; | |
947216bf AM |
4284 | loc = srela->contents + plt_index * sizeof (Elf32_External_Rela); |
4285 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); | |
252b5132 | 4286 | |
f5385ebf | 4287 | if (!h->def_regular) |
252b5132 RH |
4288 | { |
4289 | /* Mark the symbol as undefined, rather than as defined in | |
4290 | the .plt section. Leave the value alone. */ | |
4291 | sym->st_shndx = SHN_UNDEF; | |
4292 | } | |
4293 | } | |
4294 | ||
7fb9f789 | 4295 | if (elf_m68k_hash_entry (h)->glist != NULL) |
252b5132 RH |
4296 | { |
4297 | asection *sgot; | |
4298 | asection *srela; | |
7fb9f789 | 4299 | struct elf_m68k_got_entry *got_entry; |
252b5132 RH |
4300 | |
4301 | /* This symbol has an entry in the global offset table. Set it | |
4302 | up. */ | |
4303 | ||
4304 | sgot = bfd_get_section_by_name (dynobj, ".got"); | |
4305 | srela = bfd_get_section_by_name (dynobj, ".rela.got"); | |
4306 | BFD_ASSERT (sgot != NULL && srela != NULL); | |
4307 | ||
7fb9f789 NC |
4308 | got_entry = elf_m68k_hash_entry (h)->glist; |
4309 | ||
4310 | while (got_entry != NULL) | |
252b5132 | 4311 | { |
325e58c7 | 4312 | enum elf_m68k_reloc_type r_type; |
cf869cce NC |
4313 | bfd_vma got_entry_offset; |
4314 | ||
325e58c7 | 4315 | r_type = got_entry->key_.type; |
cf869cce | 4316 | got_entry_offset = got_entry->u.s2.offset &~ (bfd_vma) 1; |
7fb9f789 | 4317 | |
7fb9f789 NC |
4318 | /* If this is a -Bsymbolic link, and the symbol is defined |
4319 | locally, we just want to emit a RELATIVE reloc. Likewise if | |
4320 | the symbol was forced to be local because of a version file. | |
cf869cce | 4321 | The entry in the global offset table already have been |
7fb9f789 NC |
4322 | initialized in the relocate_section function. */ |
4323 | if (info->shared | |
2516a1ee | 4324 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
7fb9f789 | 4325 | { |
325e58c7 | 4326 | bfd_vma relocation; |
cf869cce | 4327 | |
325e58c7 NC |
4328 | relocation = bfd_get_signed_32 (output_bfd, |
4329 | (sgot->contents | |
4330 | + got_entry_offset)); | |
4331 | ||
4332 | /* Undo TP bias. */ | |
4333 | switch (elf_m68k_reloc_got_type (r_type)) | |
cf869cce NC |
4334 | { |
4335 | case R_68K_GOT32O: | |
325e58c7 | 4336 | case R_68K_TLS_LDM32: |
cf869cce NC |
4337 | break; |
4338 | ||
4339 | case R_68K_TLS_GD32: | |
325e58c7 | 4340 | relocation += dtpoff_base (info); |
cf869cce NC |
4341 | break; |
4342 | ||
4343 | case R_68K_TLS_IE32: | |
325e58c7 | 4344 | relocation += tpoff_base (info); |
cf869cce NC |
4345 | break; |
4346 | ||
4347 | default: | |
4348 | BFD_ASSERT (FALSE); | |
cf869cce NC |
4349 | } |
4350 | ||
325e58c7 NC |
4351 | elf_m68k_init_got_entry_local_shared (info, |
4352 | output_bfd, | |
4353 | r_type, | |
4354 | sgot, | |
4355 | got_entry_offset, | |
4356 | relocation, | |
4357 | srela); | |
7fb9f789 NC |
4358 | } |
4359 | else | |
4360 | { | |
325e58c7 NC |
4361 | Elf_Internal_Rela rela; |
4362 | ||
cf869cce NC |
4363 | /* Put zeros to GOT slots that will be initialized |
4364 | at run-time. */ | |
4365 | { | |
4366 | bfd_vma n_slots; | |
4367 | ||
4368 | n_slots = elf_m68k_reloc_got_n_slots (got_entry->key_.type); | |
4369 | while (n_slots--) | |
4370 | bfd_put_32 (output_bfd, (bfd_vma) 0, | |
4371 | (sgot->contents + got_entry_offset | |
4372 | + 4 * n_slots)); | |
4373 | } | |
4374 | ||
7fb9f789 | 4375 | rela.r_addend = 0; |
325e58c7 NC |
4376 | rela.r_offset = (sgot->output_section->vma |
4377 | + sgot->output_offset | |
4378 | + got_entry_offset); | |
252b5132 | 4379 | |
325e58c7 | 4380 | switch (elf_m68k_reloc_got_type (r_type)) |
cf869cce NC |
4381 | { |
4382 | case R_68K_GOT32O: | |
4383 | rela.r_info = ELF32_R_INFO (h->dynindx, R_68K_GLOB_DAT); | |
4384 | elf_m68k_install_rela (output_bfd, srela, &rela); | |
4385 | break; | |
4386 | ||
4387 | case R_68K_TLS_GD32: | |
4388 | rela.r_info = ELF32_R_INFO (h->dynindx, R_68K_TLS_DTPMOD32); | |
4389 | elf_m68k_install_rela (output_bfd, srela, &rela); | |
4390 | ||
4391 | rela.r_offset += 4; | |
4392 | rela.r_info = ELF32_R_INFO (h->dynindx, R_68K_TLS_DTPREL32); | |
4393 | elf_m68k_install_rela (output_bfd, srela, &rela); | |
4394 | break; | |
4395 | ||
4396 | case R_68K_TLS_IE32: | |
4397 | rela.r_info = ELF32_R_INFO (h->dynindx, R_68K_TLS_TPREL32); | |
4398 | elf_m68k_install_rela (output_bfd, srela, &rela); | |
4399 | break; | |
4400 | ||
4401 | default: | |
4402 | BFD_ASSERT (FALSE); | |
4403 | break; | |
4404 | } | |
4405 | } | |
7fb9f789 NC |
4406 | |
4407 | got_entry = got_entry->u.s2.next; | |
4408 | } | |
252b5132 RH |
4409 | } |
4410 | ||
f5385ebf | 4411 | if (h->needs_copy) |
252b5132 RH |
4412 | { |
4413 | asection *s; | |
4414 | Elf_Internal_Rela rela; | |
947216bf | 4415 | bfd_byte *loc; |
252b5132 RH |
4416 | |
4417 | /* This symbol needs a copy reloc. Set it up. */ | |
4418 | ||
4419 | BFD_ASSERT (h->dynindx != -1 | |
4420 | && (h->root.type == bfd_link_hash_defined | |
4421 | || h->root.type == bfd_link_hash_defweak)); | |
4422 | ||
4423 | s = bfd_get_section_by_name (h->root.u.def.section->owner, | |
4424 | ".rela.bss"); | |
4425 | BFD_ASSERT (s != NULL); | |
4426 | ||
4427 | rela.r_offset = (h->root.u.def.value | |
4428 | + h->root.u.def.section->output_section->vma | |
4429 | + h->root.u.def.section->output_offset); | |
4430 | rela.r_info = ELF32_R_INFO (h->dynindx, R_68K_COPY); | |
4431 | rela.r_addend = 0; | |
947216bf AM |
4432 | loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela); |
4433 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); | |
252b5132 RH |
4434 | } |
4435 | ||
4436 | /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */ | |
4437 | if (strcmp (h->root.root.string, "_DYNAMIC") == 0 | |
22edb2f1 | 4438 | || h == elf_hash_table (info)->hgot) |
252b5132 RH |
4439 | sym->st_shndx = SHN_ABS; |
4440 | ||
b34976b6 | 4441 | return TRUE; |
252b5132 RH |
4442 | } |
4443 | ||
4444 | /* Finish up the dynamic sections. */ | |
4445 | ||
b34976b6 | 4446 | static bfd_boolean |
252b5132 RH |
4447 | elf_m68k_finish_dynamic_sections (output_bfd, info) |
4448 | bfd *output_bfd; | |
4449 | struct bfd_link_info *info; | |
4450 | { | |
4451 | bfd *dynobj; | |
4452 | asection *sgot; | |
4453 | asection *sdyn; | |
4454 | ||
4455 | dynobj = elf_hash_table (info)->dynobj; | |
4456 | ||
4457 | sgot = bfd_get_section_by_name (dynobj, ".got.plt"); | |
4458 | BFD_ASSERT (sgot != NULL); | |
4459 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); | |
4460 | ||
4461 | if (elf_hash_table (info)->dynamic_sections_created) | |
4462 | { | |
4463 | asection *splt; | |
4464 | Elf32_External_Dyn *dyncon, *dynconend; | |
4465 | ||
4466 | splt = bfd_get_section_by_name (dynobj, ".plt"); | |
4467 | BFD_ASSERT (splt != NULL && sdyn != NULL); | |
4468 | ||
4469 | dyncon = (Elf32_External_Dyn *) sdyn->contents; | |
eea6121a | 4470 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); |
252b5132 RH |
4471 | for (; dyncon < dynconend; dyncon++) |
4472 | { | |
4473 | Elf_Internal_Dyn dyn; | |
4474 | const char *name; | |
4475 | asection *s; | |
4476 | ||
4477 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); | |
4478 | ||
4479 | switch (dyn.d_tag) | |
4480 | { | |
4481 | default: | |
4482 | break; | |
4483 | ||
4484 | case DT_PLTGOT: | |
4485 | name = ".got"; | |
4486 | goto get_vma; | |
4487 | case DT_JMPREL: | |
4488 | name = ".rela.plt"; | |
4489 | get_vma: | |
4490 | s = bfd_get_section_by_name (output_bfd, name); | |
4491 | BFD_ASSERT (s != NULL); | |
4492 | dyn.d_un.d_ptr = s->vma; | |
4493 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); | |
4494 | break; | |
4495 | ||
4496 | case DT_PLTRELSZ: | |
4497 | s = bfd_get_section_by_name (output_bfd, ".rela.plt"); | |
4498 | BFD_ASSERT (s != NULL); | |
eea6121a | 4499 | dyn.d_un.d_val = s->size; |
252b5132 RH |
4500 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
4501 | break; | |
4502 | ||
4503 | case DT_RELASZ: | |
4504 | /* The procedure linkage table relocs (DT_JMPREL) should | |
4505 | not be included in the overall relocs (DT_RELA). | |
4506 | Therefore, we override the DT_RELASZ entry here to | |
4507 | make it not include the JMPREL relocs. Since the | |
4508 | linker script arranges for .rela.plt to follow all | |
4509 | other relocation sections, we don't have to worry | |
4510 | about changing the DT_RELA entry. */ | |
4511 | s = bfd_get_section_by_name (output_bfd, ".rela.plt"); | |
4512 | if (s != NULL) | |
eea6121a | 4513 | dyn.d_un.d_val -= s->size; |
252b5132 RH |
4514 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
4515 | break; | |
4516 | } | |
4517 | } | |
4518 | ||
4519 | /* Fill in the first entry in the procedure linkage table. */ | |
eea6121a | 4520 | if (splt->size > 0) |
252b5132 | 4521 | { |
cc3e26be RS |
4522 | const struct elf_m68k_plt_info *plt_info; |
4523 | ||
4524 | plt_info = elf_m68k_hash_table (info)->plt_info; | |
4525 | memcpy (splt->contents, plt_info->plt0_entry, plt_info->size); | |
4526 | ||
4527 | elf_m68k_install_pc32 (splt, plt_info->plt0_relocs.got4, | |
4528 | (sgot->output_section->vma | |
4529 | + sgot->output_offset | |
4530 | + 4)); | |
4531 | ||
4532 | elf_m68k_install_pc32 (splt, plt_info->plt0_relocs.got8, | |
4533 | (sgot->output_section->vma | |
4534 | + sgot->output_offset | |
4535 | + 8)); | |
4536 | ||
4537 | elf_section_data (splt->output_section)->this_hdr.sh_entsize | |
4538 | = plt_info->size; | |
252b5132 | 4539 | } |
252b5132 RH |
4540 | } |
4541 | ||
4542 | /* Fill in the first three entries in the global offset table. */ | |
eea6121a | 4543 | if (sgot->size > 0) |
252b5132 RH |
4544 | { |
4545 | if (sdyn == NULL) | |
4546 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents); | |
4547 | else | |
4548 | bfd_put_32 (output_bfd, | |
4549 | sdyn->output_section->vma + sdyn->output_offset, | |
4550 | sgot->contents); | |
4551 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4); | |
4552 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8); | |
4553 | } | |
4554 | ||
4555 | elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4; | |
4556 | ||
b34976b6 | 4557 | return TRUE; |
252b5132 RH |
4558 | } |
4559 | ||
0752970e NC |
4560 | /* Given a .data section and a .emreloc in-memory section, store |
4561 | relocation information into the .emreloc section which can be | |
4562 | used at runtime to relocate the section. This is called by the | |
4563 | linker when the --embedded-relocs switch is used. This is called | |
4564 | after the add_symbols entry point has been called for all the | |
4565 | objects, and before the final_link entry point is called. */ | |
4566 | ||
b34976b6 | 4567 | bfd_boolean |
0752970e NC |
4568 | bfd_m68k_elf32_create_embedded_relocs (abfd, info, datasec, relsec, errmsg) |
4569 | bfd *abfd; | |
4570 | struct bfd_link_info *info; | |
4571 | asection *datasec; | |
4572 | asection *relsec; | |
4573 | char **errmsg; | |
4574 | { | |
4575 | Elf_Internal_Shdr *symtab_hdr; | |
6cdc0ccc AM |
4576 | Elf_Internal_Sym *isymbuf = NULL; |
4577 | Elf_Internal_Rela *internal_relocs = NULL; | |
0752970e NC |
4578 | Elf_Internal_Rela *irel, *irelend; |
4579 | bfd_byte *p; | |
dc810e39 | 4580 | bfd_size_type amt; |
0752970e | 4581 | |
1049f94e | 4582 | BFD_ASSERT (! info->relocatable); |
0752970e NC |
4583 | |
4584 | *errmsg = NULL; | |
4585 | ||
4586 | if (datasec->reloc_count == 0) | |
b34976b6 | 4587 | return TRUE; |
0752970e NC |
4588 | |
4589 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
9ad5cbcf | 4590 | |
0752970e | 4591 | /* Get a copy of the native relocations. */ |
45d6a902 | 4592 | internal_relocs = (_bfd_elf_link_read_relocs |
0752970e NC |
4593 | (abfd, datasec, (PTR) NULL, (Elf_Internal_Rela *) NULL, |
4594 | info->keep_memory)); | |
4595 | if (internal_relocs == NULL) | |
4596 | goto error_return; | |
0752970e | 4597 | |
dc810e39 AM |
4598 | amt = (bfd_size_type) datasec->reloc_count * 12; |
4599 | relsec->contents = (bfd_byte *) bfd_alloc (abfd, amt); | |
0752970e NC |
4600 | if (relsec->contents == NULL) |
4601 | goto error_return; | |
4602 | ||
4603 | p = relsec->contents; | |
4604 | ||
4605 | irelend = internal_relocs + datasec->reloc_count; | |
4606 | for (irel = internal_relocs; irel < irelend; irel++, p += 12) | |
4607 | { | |
4608 | asection *targetsec; | |
4609 | ||
4610 | /* We are going to write a four byte longword into the runtime | |
4611 | reloc section. The longword will be the address in the data | |
4612 | section which must be relocated. It is followed by the name | |
4613 | of the target section NUL-padded or truncated to 8 | |
4614 | characters. */ | |
4615 | ||
4616 | /* We can only relocate absolute longword relocs at run time. */ | |
4617 | if (ELF32_R_TYPE (irel->r_info) != (int) R_68K_32) | |
4618 | { | |
4619 | *errmsg = _("unsupported reloc type"); | |
4620 | bfd_set_error (bfd_error_bad_value); | |
4621 | goto error_return; | |
4622 | } | |
4623 | ||
4624 | /* Get the target section referred to by the reloc. */ | |
4625 | if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info) | |
4626 | { | |
0752970e | 4627 | /* A local symbol. */ |
6cdc0ccc AM |
4628 | Elf_Internal_Sym *isym; |
4629 | ||
4630 | /* Read this BFD's local symbols if we haven't done so already. */ | |
4631 | if (isymbuf == NULL) | |
4632 | { | |
4633 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; | |
4634 | if (isymbuf == NULL) | |
4635 | isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, | |
4636 | symtab_hdr->sh_info, 0, | |
4637 | NULL, NULL, NULL); | |
4638 | if (isymbuf == NULL) | |
4639 | goto error_return; | |
4640 | } | |
0752970e | 4641 | |
6cdc0ccc AM |
4642 | isym = isymbuf + ELF32_R_SYM (irel->r_info); |
4643 | targetsec = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
0752970e NC |
4644 | } |
4645 | else | |
4646 | { | |
4647 | unsigned long indx; | |
4648 | struct elf_link_hash_entry *h; | |
4649 | ||
4650 | /* An external symbol. */ | |
4651 | indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info; | |
4652 | h = elf_sym_hashes (abfd)[indx]; | |
4653 | BFD_ASSERT (h != NULL); | |
4654 | if (h->root.type == bfd_link_hash_defined | |
4655 | || h->root.type == bfd_link_hash_defweak) | |
4656 | targetsec = h->root.u.def.section; | |
4657 | else | |
4658 | targetsec = NULL; | |
4659 | } | |
4660 | ||
4661 | bfd_put_32 (abfd, irel->r_offset + datasec->output_offset, p); | |
4662 | memset (p + 4, 0, 8); | |
4663 | if (targetsec != NULL) | |
f075ee0c | 4664 | strncpy ((char *) p + 4, targetsec->output_section->name, 8); |
0752970e | 4665 | } |
c3668558 | 4666 | |
6cdc0ccc AM |
4667 | if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf) |
4668 | free (isymbuf); | |
4669 | if (internal_relocs != NULL | |
4670 | && elf_section_data (datasec)->relocs != internal_relocs) | |
4671 | free (internal_relocs); | |
b34976b6 | 4672 | return TRUE; |
0752970e NC |
4673 | |
4674 | error_return: | |
6cdc0ccc AM |
4675 | if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf) |
4676 | free (isymbuf); | |
4677 | if (internal_relocs != NULL | |
4678 | && elf_section_data (datasec)->relocs != internal_relocs) | |
4679 | free (internal_relocs); | |
b34976b6 | 4680 | return FALSE; |
0752970e NC |
4681 | } |
4682 | ||
7fb9f789 NC |
4683 | /* Set target options. */ |
4684 | ||
4685 | void | |
4686 | bfd_elf_m68k_set_target_options (struct bfd_link_info *info, int got_handling) | |
4687 | { | |
4688 | struct elf_m68k_link_hash_table *htab; | |
4689 | ||
4690 | htab = elf_m68k_hash_table (info); | |
4691 | ||
4692 | switch (got_handling) | |
4693 | { | |
4694 | case 0: | |
4695 | /* --got=single. */ | |
4696 | htab->local_gp_p = FALSE; | |
4697 | htab->use_neg_got_offsets_p = FALSE; | |
4698 | htab->allow_multigot_p = FALSE; | |
4699 | break; | |
4700 | ||
4701 | case 1: | |
4702 | /* --got=negative. */ | |
4703 | htab->local_gp_p = TRUE; | |
4704 | htab->use_neg_got_offsets_p = TRUE; | |
4705 | htab->allow_multigot_p = FALSE; | |
4706 | break; | |
4707 | ||
4708 | case 2: | |
4709 | /* --got=multigot. */ | |
4710 | htab->local_gp_p = TRUE; | |
4711 | htab->use_neg_got_offsets_p = TRUE; | |
4712 | htab->allow_multigot_p = TRUE; | |
4713 | break; | |
4714 | ||
4715 | default: | |
4716 | BFD_ASSERT (FALSE); | |
4717 | } | |
4718 | } | |
4719 | ||
aa91b392 | 4720 | static enum elf_reloc_type_class |
f51e552e AM |
4721 | elf32_m68k_reloc_type_class (rela) |
4722 | const Elf_Internal_Rela *rela; | |
aa91b392 | 4723 | { |
f51e552e | 4724 | switch ((int) ELF32_R_TYPE (rela->r_info)) |
aa91b392 AS |
4725 | { |
4726 | case R_68K_RELATIVE: | |
4727 | return reloc_class_relative; | |
4728 | case R_68K_JMP_SLOT: | |
4729 | return reloc_class_plt; | |
4730 | case R_68K_COPY: | |
4731 | return reloc_class_copy; | |
4732 | default: | |
4733 | return reloc_class_normal; | |
4734 | } | |
4735 | } | |
4736 | ||
1715e0e3 AS |
4737 | /* Return address for Ith PLT stub in section PLT, for relocation REL |
4738 | or (bfd_vma) -1 if it should not be included. */ | |
4739 | ||
4740 | static bfd_vma | |
4741 | elf_m68k_plt_sym_val (bfd_vma i, const asection *plt, | |
4742 | const arelent *rel ATTRIBUTE_UNUSED) | |
4743 | { | |
cc3e26be | 4744 | return plt->vma + (i + 1) * elf_m68k_get_plt_info (plt->owner)->size; |
1715e0e3 AS |
4745 | } |
4746 | ||
252b5132 RH |
4747 | #define TARGET_BIG_SYM bfd_elf32_m68k_vec |
4748 | #define TARGET_BIG_NAME "elf32-m68k" | |
4749 | #define ELF_MACHINE_CODE EM_68K | |
4750 | #define ELF_MAXPAGESIZE 0x2000 | |
4751 | #define elf_backend_create_dynamic_sections \ | |
4752 | _bfd_elf_create_dynamic_sections | |
4753 | #define bfd_elf32_bfd_link_hash_table_create \ | |
4754 | elf_m68k_link_hash_table_create | |
7fb9f789 NC |
4755 | /* ??? Should it be this macro or bfd_elfNN_bfd_link_hash_table_create? */ |
4756 | #define bfd_elf32_bfd_link_hash_table_free \ | |
4757 | elf_m68k_link_hash_table_free | |
4758 | #define bfd_elf32_bfd_final_link bfd_elf_final_link | |
252b5132 RH |
4759 | |
4760 | #define elf_backend_check_relocs elf_m68k_check_relocs | |
cc3e26be RS |
4761 | #define elf_backend_always_size_sections \ |
4762 | elf_m68k_always_size_sections | |
252b5132 RH |
4763 | #define elf_backend_adjust_dynamic_symbol \ |
4764 | elf_m68k_adjust_dynamic_symbol | |
4765 | #define elf_backend_size_dynamic_sections \ | |
4766 | elf_m68k_size_dynamic_sections | |
74541ad4 | 4767 | #define elf_backend_init_index_section _bfd_elf_init_1_index_section |
252b5132 RH |
4768 | #define elf_backend_relocate_section elf_m68k_relocate_section |
4769 | #define elf_backend_finish_dynamic_symbol \ | |
4770 | elf_m68k_finish_dynamic_symbol | |
4771 | #define elf_backend_finish_dynamic_sections \ | |
4772 | elf_m68k_finish_dynamic_sections | |
4773 | #define elf_backend_gc_mark_hook elf_m68k_gc_mark_hook | |
4774 | #define elf_backend_gc_sweep_hook elf_m68k_gc_sweep_hook | |
7fb9f789 | 4775 | #define elf_backend_copy_indirect_symbol elf_m68k_copy_indirect_symbol |
9e1281c7 CM |
4776 | #define bfd_elf32_bfd_merge_private_bfd_data \ |
4777 | elf32_m68k_merge_private_bfd_data | |
4778 | #define bfd_elf32_bfd_set_private_flags \ | |
4779 | elf32_m68k_set_private_flags | |
4780 | #define bfd_elf32_bfd_print_private_bfd_data \ | |
4781 | elf32_m68k_print_private_bfd_data | |
aa91b392 | 4782 | #define elf_backend_reloc_type_class elf32_m68k_reloc_type_class |
1715e0e3 | 4783 | #define elf_backend_plt_sym_val elf_m68k_plt_sym_val |
266abb8f | 4784 | #define elf_backend_object_p elf32_m68k_object_p |
9e1281c7 | 4785 | |
252b5132 | 4786 | #define elf_backend_can_gc_sections 1 |
51b64d56 | 4787 | #define elf_backend_can_refcount 1 |
252b5132 RH |
4788 | #define elf_backend_want_got_plt 1 |
4789 | #define elf_backend_plt_readonly 1 | |
4790 | #define elf_backend_want_plt_sym 0 | |
4791 | #define elf_backend_got_header_size 12 | |
b491616a | 4792 | #define elf_backend_rela_normal 1 |
252b5132 RH |
4793 | |
4794 | #include "elf32-target.h" |