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