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59d23ada | 1 | /* Motorola MCore specific support for 32-bit ELF |
ab96bf03 AM |
2 | Copyright 1994, 1995, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, |
3 | 2007 Free Software Foundation, Inc. | |
252b5132 | 4 | |
47b0e7ad | 5 | This file is part of BFD, the Binary File Descriptor library. |
252b5132 | 6 | |
47b0e7ad 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 | |
9 | the Free Software Foundation; either version 2 of the License, or | |
10 | (at your option) any later version. | |
252b5132 | 11 | |
47b0e7ad 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 | |
47b0e7ad 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 | |
19 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, | |
20 | USA. */ | |
252b5132 RH |
21 | |
22 | /* This file is based on a preliminary RCE ELF ABI. The | |
23 | information may not match the final RCE ELF ABI. */ | |
24 | ||
25 | #include "bfd.h" | |
26 | #include "sysdep.h" | |
27 | #include "bfdlink.h" | |
28 | #include "libbfd.h" | |
29 | #include "elf-bfd.h" | |
30 | #include "elf/mcore.h" | |
31 | #include <assert.h> | |
32 | ||
f0fe0e16 | 33 | /* RELA relocs are used here... */ |
252b5132 | 34 | |
47b0e7ad NC |
35 | /* Function to set whether a module needs the -mrelocatable bit set. */ |
36 | ||
37 | static bfd_boolean | |
38 | mcore_elf_set_private_flags (bfd * abfd, flagword flags) | |
39 | { | |
40 | BFD_ASSERT (! elf_flags_init (abfd) | |
41 | || elf_elfheader (abfd)->e_flags == flags); | |
42 | ||
43 | elf_elfheader (abfd)->e_flags = flags; | |
44 | elf_flags_init (abfd) = TRUE; | |
45 | return TRUE; | |
46 | } | |
47 | ||
48 | /* Merge backend specific data from an object file to the output | |
49 | object file when linking. */ | |
50 | ||
51 | static bfd_boolean | |
52 | mcore_elf_merge_private_bfd_data (bfd * ibfd, bfd * obfd) | |
53 | { | |
54 | flagword old_flags; | |
55 | flagword new_flags; | |
56 | ||
57 | /* Check if we have the same endianess. */ | |
58 | if (! _bfd_generic_verify_endian_match (ibfd, obfd)) | |
59 | return FALSE; | |
60 | ||
61 | if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour | |
62 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) | |
63 | return TRUE; | |
64 | ||
65 | new_flags = elf_elfheader (ibfd)->e_flags; | |
66 | old_flags = elf_elfheader (obfd)->e_flags; | |
67 | ||
68 | if (! elf_flags_init (obfd)) | |
69 | { | |
70 | /* First call, no flags set. */ | |
71 | elf_flags_init (obfd) = TRUE; | |
72 | elf_elfheader (obfd)->e_flags = new_flags; | |
73 | } | |
74 | else if (new_flags == old_flags) | |
75 | /* Compatible flags are OK. */ | |
76 | ; | |
77 | else | |
78 | { | |
79 | /* FIXME */ | |
80 | } | |
81 | ||
82 | return TRUE; | |
83 | } | |
84 | \f | |
85 | /* Don't pretend we can deal with unsupported relocs. */ | |
86 | ||
87 | static bfd_reloc_status_type | |
88 | mcore_elf_unsupported_reloc (bfd * abfd, | |
89 | arelent * reloc_entry, | |
90 | asymbol * symbol ATTRIBUTE_UNUSED, | |
91 | PTR data ATTRIBUTE_UNUSED, | |
92 | asection * input_section ATTRIBUTE_UNUSED, | |
93 | bfd * output_bfd ATTRIBUTE_UNUSED, | |
94 | char ** error_message ATTRIBUTE_UNUSED) | |
95 | { | |
96 | BFD_ASSERT (reloc_entry->howto != (reloc_howto_type *)0); | |
97 | ||
98 | _bfd_error_handler (_("%B: Relocation %s (%d) is not currently supported.\n"), | |
99 | abfd, | |
100 | reloc_entry->howto->name, | |
101 | reloc_entry->howto->type); | |
102 | ||
103 | return bfd_reloc_notsupported; | |
104 | } | |
252b5132 RH |
105 | |
106 | static reloc_howto_type * mcore_elf_howto_table [(int) R_MCORE_max]; | |
107 | ||
108 | static reloc_howto_type mcore_elf_howto_raw[] = | |
109 | { | |
110 | /* This reloc does nothing. */ | |
111 | HOWTO (R_MCORE_NONE, /* type */ | |
112 | 0, /* rightshift */ | |
113 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
59d23ada | 114 | 32, /* bitsize */ |
b34976b6 | 115 | FALSE, /* pc_relative */ |
252b5132 RH |
116 | 0, /* bitpos */ |
117 | complain_overflow_bitfield, /* complain_on_overflow */ | |
59d23ada | 118 | NULL, /* special_function */ |
252b5132 | 119 | "R_MCORE_NONE", /* name */ |
b34976b6 | 120 | FALSE, /* partial_inplace */ |
252b5132 RH |
121 | 0, /* src_mask */ |
122 | 0, /* dst_mask */ | |
b34976b6 | 123 | FALSE), /* pcrel_offset */ |
252b5132 RH |
124 | |
125 | /* A standard 32 bit relocation. */ | |
126 | HOWTO (R_MCORE_ADDR32, /* type */ | |
127 | 0, /* rightshift */ | |
128 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
129 | 32, /* bitsize */ | |
b34976b6 | 130 | FALSE, /* pc_relative */ |
252b5132 RH |
131 | 0, /* bitpos */ |
132 | complain_overflow_bitfield, /* complain_on_overflow */ | |
133 | bfd_elf_generic_reloc, /* special_function */ | |
4cc11e76 | 134 | "ADDR32", /* name *//* For compatibility with coff/pe port. */ |
b34976b6 | 135 | FALSE, /* partial_inplace */ |
252b5132 RH |
136 | 0x0, /* src_mask */ |
137 | 0xffffffff, /* dst_mask */ | |
b34976b6 | 138 | FALSE), /* pcrel_offset */ |
252b5132 RH |
139 | |
140 | /* 8 bits + 2 zero bits; jmpi/jsri/lrw instructions. | |
c3668558 | 141 | Should not appear in object files. */ |
252b5132 RH |
142 | HOWTO (R_MCORE_PCRELIMM8BY4, /* type */ |
143 | 2, /* rightshift */ | |
144 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
145 | 8, /* bitsize */ | |
b34976b6 | 146 | TRUE, /* pc_relative */ |
252b5132 RH |
147 | 0, /* bitpos */ |
148 | complain_overflow_bitfield, /* complain_on_overflow */ | |
149 | mcore_elf_unsupported_reloc, /* special_function */ | |
150 | "R_MCORE_PCRELIMM8BY4",/* name */ | |
b34976b6 | 151 | FALSE, /* partial_inplace */ |
252b5132 RH |
152 | 0, /* src_mask */ |
153 | 0, /* dst_mask */ | |
b34976b6 | 154 | TRUE), /* pcrel_offset */ |
252b5132 | 155 | |
c3668558 | 156 | /* bsr/bt/bf/br instructions; 11 bits + 1 zero bit |
252b5132 RH |
157 | Span 2k instructions == 4k bytes. |
158 | Only useful pieces at the relocated address are the opcode (5 bits) */ | |
159 | HOWTO (R_MCORE_PCRELIMM11BY2,/* type */ | |
160 | 1, /* rightshift */ | |
161 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
162 | 11, /* bitsize */ | |
b34976b6 | 163 | TRUE, /* pc_relative */ |
252b5132 RH |
164 | 0, /* bitpos */ |
165 | complain_overflow_signed, /* complain_on_overflow */ | |
166 | bfd_elf_generic_reloc, /* special_function */ | |
167 | "R_MCORE_PCRELIMM11BY2",/* name */ | |
b34976b6 | 168 | FALSE, /* partial_inplace */ |
252b5132 RH |
169 | 0x0, /* src_mask */ |
170 | 0x7ff, /* dst_mask */ | |
b34976b6 | 171 | TRUE), /* pcrel_offset */ |
252b5132 | 172 | |
c3668558 | 173 | /* 4 bits + 1 zero bit; 'loopt' instruction only; unsupported. */ |
252b5132 RH |
174 | HOWTO (R_MCORE_PCRELIMM4BY2, /* type */ |
175 | 1, /* rightshift */ | |
176 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
177 | 4, /* bitsize */ | |
b34976b6 | 178 | TRUE, /* pc_relative */ |
252b5132 RH |
179 | 0, /* bitpos */ |
180 | complain_overflow_bitfield, /* complain_on_overflow */ | |
181 | mcore_elf_unsupported_reloc,/* special_function */ | |
182 | "R_MCORE_PCRELIMM4BY2",/* name */ | |
b34976b6 | 183 | FALSE, /* partial_inplace */ |
252b5132 RH |
184 | 0, /* src_mask */ |
185 | 0, /* dst_mask */ | |
b34976b6 | 186 | TRUE), /* pcrel_offset */ |
252b5132 | 187 | |
c3668558 | 188 | /* 32-bit pc-relative. Eventually this will help support PIC code. */ |
252b5132 RH |
189 | HOWTO (R_MCORE_PCREL32, /* type */ |
190 | 0, /* rightshift */ | |
191 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
192 | 32, /* bitsize */ | |
b34976b6 | 193 | TRUE, /* pc_relative */ |
252b5132 RH |
194 | 0, /* bitpos */ |
195 | complain_overflow_bitfield, /* complain_on_overflow */ | |
196 | bfd_elf_generic_reloc, /* special_function */ | |
197 | "R_MCORE_PCREL32", /* name */ | |
b34976b6 | 198 | FALSE, /* partial_inplace */ |
252b5132 RH |
199 | 0x0, /* src_mask */ |
200 | 0xffffffff, /* dst_mask */ | |
b34976b6 | 201 | TRUE), /* pcrel_offset */ |
252b5132 RH |
202 | |
203 | /* Like PCRELIMM11BY2, this relocation indicates that there is a | |
204 | 'jsri' at the specified address. There is a separate relocation | |
c3668558 | 205 | entry for the literal pool entry that it references, but we |
252b5132 RH |
206 | might be able to change the jsri to a bsr if the target turns out |
207 | to be close enough [even though we won't reclaim the literal pool | |
208 | entry, we'll get some runtime efficiency back]. Note that this | |
c3668558 | 209 | is a relocation that we are allowed to safely ignore. */ |
252b5132 RH |
210 | HOWTO (R_MCORE_PCRELJSR_IMM11BY2,/* type */ |
211 | 1, /* rightshift */ | |
212 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
213 | 11, /* bitsize */ | |
b34976b6 | 214 | TRUE, /* pc_relative */ |
252b5132 RH |
215 | 0, /* bitpos */ |
216 | complain_overflow_signed, /* complain_on_overflow */ | |
217 | bfd_elf_generic_reloc, /* special_function */ | |
218 | "R_MCORE_PCRELJSR_IMM11BY2", /* name */ | |
b34976b6 | 219 | FALSE, /* partial_inplace */ |
252b5132 RH |
220 | 0x0, /* src_mask */ |
221 | 0x7ff, /* dst_mask */ | |
b34976b6 | 222 | TRUE), /* pcrel_offset */ |
c3668558 | 223 | |
47b0e7ad | 224 | /* GNU extension to record C++ vtable hierarchy. */ |
252b5132 RH |
225 | HOWTO (R_MCORE_GNU_VTINHERIT, /* type */ |
226 | 0, /* rightshift */ | |
227 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
228 | 0, /* bitsize */ | |
b34976b6 | 229 | FALSE, /* pc_relative */ |
252b5132 RH |
230 | 0, /* bitpos */ |
231 | complain_overflow_dont, /* complain_on_overflow */ | |
232 | NULL, /* special_function */ | |
233 | "R_MCORE_GNU_VTINHERIT", /* name */ | |
b34976b6 | 234 | FALSE, /* partial_inplace */ |
252b5132 RH |
235 | 0, /* src_mask */ |
236 | 0, /* dst_mask */ | |
b34976b6 | 237 | FALSE), /* pcrel_offset */ |
252b5132 | 238 | |
47b0e7ad | 239 | /* GNU extension to record C++ vtable member usage. */ |
252b5132 RH |
240 | HOWTO (R_MCORE_GNU_VTENTRY, /* type */ |
241 | 0, /* rightshift */ | |
242 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
243 | 0, /* bitsize */ | |
b34976b6 | 244 | FALSE, /* pc_relative */ |
252b5132 RH |
245 | 0, /* bitpos */ |
246 | complain_overflow_dont,/* complain_on_overflow */ | |
247 | _bfd_elf_rel_vtable_reloc_fn, /* special_function */ | |
248 | "R_MCORE_GNU_VTENTRY", /* name */ | |
b34976b6 | 249 | FALSE, /* partial_inplace */ |
252b5132 RH |
250 | 0, /* src_mask */ |
251 | 0, /* dst_mask */ | |
b34976b6 | 252 | FALSE), /* pcrel_offset */ |
c3668558 | 253 | |
36797d47 NC |
254 | HOWTO (R_MCORE_RELATIVE, /* type */ |
255 | 0, /* rightshift */ | |
256 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
257 | 32, /* bitsize */ | |
b34976b6 | 258 | FALSE, /* pc_relative */ |
36797d47 NC |
259 | 0, /* bitpos */ |
260 | complain_overflow_signed, /* complain_on_overflow */ | |
261 | NULL, /* special_function */ | |
262 | "R_MCORE_RELATIVE", /* name */ | |
b34976b6 | 263 | TRUE, /* partial_inplace */ |
36797d47 NC |
264 | 0xffffffff, /* src_mask */ |
265 | 0xffffffff, /* dst_mask */ | |
b34976b6 | 266 | FALSE) /* pcrel_offset */ |
252b5132 RH |
267 | }; |
268 | ||
269 | #ifndef NUM_ELEM | |
270 | #define NUM_ELEM(a) (sizeof (a) / sizeof (a)[0]) | |
271 | #endif | |
272 | \f | |
273 | /* Initialize the mcore_elf_howto_table, so that linear accesses can be done. */ | |
274 | static void | |
47b0e7ad | 275 | mcore_elf_howto_init (void) |
252b5132 RH |
276 | { |
277 | unsigned int i; | |
278 | ||
279 | for (i = NUM_ELEM (mcore_elf_howto_raw); i--;) | |
280 | { | |
281 | unsigned int type; | |
c3668558 | 282 | |
252b5132 | 283 | type = mcore_elf_howto_raw[i].type; |
c3668558 | 284 | |
252b5132 | 285 | BFD_ASSERT (type < NUM_ELEM (mcore_elf_howto_table)); |
c3668558 | 286 | |
252b5132 RH |
287 | mcore_elf_howto_table [type] = & mcore_elf_howto_raw [i]; |
288 | } | |
289 | } | |
252b5132 RH |
290 | \f |
291 | static reloc_howto_type * | |
47b0e7ad NC |
292 | mcore_elf_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED, |
293 | bfd_reloc_code_real_type code) | |
252b5132 RH |
294 | { |
295 | enum elf_mcore_reloc_type mcore_reloc = R_MCORE_NONE; | |
296 | ||
297 | switch (code) | |
298 | { | |
299 | case BFD_RELOC_NONE: mcore_reloc = R_MCORE_NONE; break; | |
300 | case BFD_RELOC_32: mcore_reloc = R_MCORE_ADDR32; break; | |
301 | case BFD_RELOC_MCORE_PCREL_IMM8BY4: mcore_reloc = R_MCORE_PCRELIMM8BY4; break; | |
302 | case BFD_RELOC_MCORE_PCREL_IMM11BY2: mcore_reloc = R_MCORE_PCRELIMM11BY2; break; | |
303 | case BFD_RELOC_MCORE_PCREL_IMM4BY2: mcore_reloc = R_MCORE_PCRELIMM4BY2; break; | |
304 | case BFD_RELOC_32_PCREL: mcore_reloc = R_MCORE_PCREL32; break; | |
305 | case BFD_RELOC_MCORE_PCREL_JSR_IMM11BY2: mcore_reloc = R_MCORE_PCRELJSR_IMM11BY2; break; | |
306 | case BFD_RELOC_VTABLE_INHERIT: mcore_reloc = R_MCORE_GNU_VTINHERIT; break; | |
307 | case BFD_RELOC_VTABLE_ENTRY: mcore_reloc = R_MCORE_GNU_VTENTRY; break; | |
36797d47 | 308 | case BFD_RELOC_RVA: mcore_reloc = R_MCORE_RELATIVE; break; |
252b5132 | 309 | default: |
47b0e7ad | 310 | return NULL; |
252b5132 RH |
311 | } |
312 | ||
47b0e7ad NC |
313 | if (! mcore_elf_howto_table [R_MCORE_PCRELIMM8BY4]) |
314 | /* Initialize howto table if needed. */ | |
252b5132 RH |
315 | mcore_elf_howto_init (); |
316 | ||
317 | return mcore_elf_howto_table [(int) mcore_reloc]; | |
318 | }; | |
319 | ||
320 | /* Set the howto pointer for a RCE ELF reloc. */ | |
47b0e7ad | 321 | |
252b5132 | 322 | static void |
47b0e7ad NC |
323 | mcore_elf_info_to_howto (bfd * abfd ATTRIBUTE_UNUSED, |
324 | arelent * cache_ptr, | |
325 | Elf_Internal_Rela * dst) | |
252b5132 | 326 | { |
47b0e7ad NC |
327 | if (! mcore_elf_howto_table [R_MCORE_PCRELIMM8BY4]) |
328 | /* Initialize howto table if needed. */ | |
252b5132 RH |
329 | mcore_elf_howto_init (); |
330 | ||
331 | BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_MCORE_max); | |
c3668558 | 332 | |
252b5132 RH |
333 | cache_ptr->howto = mcore_elf_howto_table [ELF32_R_TYPE (dst->r_info)]; |
334 | } | |
252b5132 RH |
335 | \f |
336 | /* The RELOCATE_SECTION function is called by the ELF backend linker | |
337 | to handle the relocations for a section. | |
338 | ||
339 | The relocs are always passed as Rela structures; if the section | |
340 | actually uses Rel structures, the r_addend field will always be | |
341 | zero. | |
342 | ||
343 | This function is responsible for adjust the section contents as | |
344 | necessary, and (if using Rela relocs and generating a | |
1049f94e | 345 | relocatable output file) adjusting the reloc addend as |
252b5132 RH |
346 | necessary. |
347 | ||
348 | This function does not have to worry about setting the reloc | |
349 | address or the reloc symbol index. | |
350 | ||
351 | LOCAL_SYMS is a pointer to the swapped in local symbols. | |
352 | ||
353 | LOCAL_SECTIONS is an array giving the section in the input file | |
354 | corresponding to the st_shndx field of each local symbol. | |
355 | ||
356 | The global hash table entry for the global symbols can be found | |
357 | via elf_sym_hashes (input_bfd). | |
358 | ||
1049f94e | 359 | When generating relocatable output, this function must handle |
252b5132 RH |
360 | STB_LOCAL/STT_SECTION symbols specially. The output symbol is |
361 | going to be the section symbol corresponding to the output | |
362 | section, which means that the addend must be adjusted | |
363 | accordingly. */ | |
364 | ||
b34976b6 | 365 | static bfd_boolean |
47b0e7ad NC |
366 | mcore_elf_relocate_section (bfd * output_bfd, |
367 | struct bfd_link_info * info, | |
368 | bfd * input_bfd, | |
369 | asection * input_section, | |
370 | bfd_byte * contents, | |
371 | Elf_Internal_Rela * relocs, | |
372 | Elf_Internal_Sym * local_syms, | |
373 | asection ** local_sections) | |
252b5132 | 374 | { |
b34976b6 | 375 | Elf_Internal_Shdr * symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr; |
252b5132 | 376 | struct elf_link_hash_entry ** sym_hashes = elf_sym_hashes (input_bfd); |
b34976b6 AM |
377 | Elf_Internal_Rela * rel = relocs; |
378 | Elf_Internal_Rela * relend = relocs + input_section->reloc_count; | |
379 | bfd_boolean ret = TRUE; | |
252b5132 RH |
380 | |
381 | #ifdef DEBUG | |
d003868e AM |
382 | _bfd_error_handler |
383 | ("mcore_elf_relocate_section called for %B section %A, %ld relocations%s", | |
384 | input_bfd, | |
385 | input_section, | |
386 | (long) input_section->reloc_count, | |
387 | (info->relocatable) ? " (relocatable)" : ""); | |
252b5132 RH |
388 | #endif |
389 | ||
390 | if (! mcore_elf_howto_table [R_MCORE_PCRELIMM8BY4]) /* Initialize howto table if needed */ | |
391 | mcore_elf_howto_init (); | |
392 | ||
393 | for (; rel < relend; rel++) | |
394 | { | |
395 | enum elf_mcore_reloc_type r_type = (enum elf_mcore_reloc_type) ELF32_R_TYPE (rel->r_info); | |
396 | bfd_vma offset = rel->r_offset; | |
397 | bfd_vma addend = rel->r_addend; | |
398 | bfd_reloc_status_type r = bfd_reloc_other; | |
47b0e7ad | 399 | asection * sec = NULL; |
252b5132 RH |
400 | reloc_howto_type * howto; |
401 | bfd_vma relocation; | |
47b0e7ad | 402 | Elf_Internal_Sym * sym = NULL; |
252b5132 | 403 | unsigned long r_symndx; |
47b0e7ad | 404 | struct elf_link_hash_entry * h = NULL; |
86033394 | 405 | unsigned short oldinst = 0; |
c3668558 | 406 | |
47b0e7ad | 407 | /* Unknown relocation handling. */ |
252b5132 RH |
408 | if ((unsigned) r_type >= (unsigned) R_MCORE_max |
409 | || ! mcore_elf_howto_table [(int)r_type]) | |
410 | { | |
d003868e AM |
411 | _bfd_error_handler (_("%B: Unknown relocation type %d\n"), |
412 | input_bfd, (int) r_type); | |
252b5132 RH |
413 | |
414 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 415 | ret = FALSE; |
252b5132 RH |
416 | continue; |
417 | } | |
c3668558 | 418 | |
252b5132 RH |
419 | howto = mcore_elf_howto_table [(int) r_type]; |
420 | r_symndx = ELF32_R_SYM (rel->r_info); | |
c3668558 | 421 | |
a022216b | 422 | /* Complain about known relocation that are not yet supported. */ |
252b5132 RH |
423 | if (howto->special_function == mcore_elf_unsupported_reloc) |
424 | { | |
d003868e AM |
425 | _bfd_error_handler (_("%B: Relocation %s (%d) is not currently supported.\n"), |
426 | input_bfd, | |
252b5132 RH |
427 | howto->name, |
428 | (int)r_type); | |
429 | ||
430 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 431 | ret = FALSE; |
252b5132 RH |
432 | continue; |
433 | } | |
434 | ||
435 | if (r_symndx < symtab_hdr->sh_info) | |
436 | { | |
437 | sym = local_syms + r_symndx; | |
438 | sec = local_sections [r_symndx]; | |
8517fae7 | 439 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); |
f8df10f4 | 440 | addend = rel->r_addend; |
252b5132 RH |
441 | } |
442 | else | |
443 | { | |
59c2e50f L |
444 | bfd_boolean unresolved_reloc, warned; |
445 | ||
b2a8e766 AM |
446 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
447 | r_symndx, symtab_hdr, sym_hashes, | |
448 | h, sec, relocation, | |
449 | unresolved_reloc, warned); | |
252b5132 RH |
450 | } |
451 | ||
ab96bf03 AM |
452 | if (sec != NULL && elf_discarded_section (sec)) |
453 | { | |
454 | /* For relocs against symbols from removed linkonce sections, | |
455 | or sections discarded by a linker script, we just want the | |
456 | section contents zeroed. Avoid any special processing. */ | |
457 | _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset); | |
458 | rel->r_info = 0; | |
459 | rel->r_addend = 0; | |
460 | continue; | |
461 | } | |
462 | ||
463 | if (info->relocatable) | |
464 | continue; | |
465 | ||
252b5132 RH |
466 | switch (r_type) |
467 | { | |
468 | default: | |
252b5132 RH |
469 | break; |
470 | ||
471 | case R_MCORE_PCRELJSR_IMM11BY2: | |
472 | oldinst = bfd_get_16 (input_bfd, contents + offset); | |
473 | #define MCORE_INST_BSR 0xF800 | |
dc810e39 | 474 | bfd_put_16 (input_bfd, (bfd_vma) MCORE_INST_BSR, contents + offset); |
252b5132 RH |
475 | break; |
476 | } | |
477 | ||
252b5132 RH |
478 | #ifdef DEBUG |
479 | fprintf (stderr, "\ttype = %s (%d), symbol index = %ld, offset = %ld, addend = %ld\n", | |
480 | howto->name, r_type, r_symndx, (long) offset, (long) addend); | |
481 | #endif | |
482 | ||
483 | r = _bfd_final_link_relocate | |
484 | (howto, input_bfd, input_section, contents, offset, relocation, addend); | |
485 | ||
486 | if (r != bfd_reloc_ok && r_type == R_MCORE_PCRELJSR_IMM11BY2) | |
487 | { | |
488 | /* Wasn't ok, back it out and give up. */ | |
dc810e39 | 489 | bfd_put_16 (input_bfd, (bfd_vma) oldinst, contents + offset); |
252b5132 RH |
490 | r = bfd_reloc_ok; |
491 | } | |
c3668558 | 492 | |
252b5132 RH |
493 | if (r != bfd_reloc_ok) |
494 | { | |
b34976b6 | 495 | ret = FALSE; |
c3668558 | 496 | |
252b5132 RH |
497 | switch (r) |
498 | { | |
499 | default: | |
500 | break; | |
501 | ||
502 | case bfd_reloc_overflow: | |
503 | { | |
504 | const char * name; | |
505 | ||
506 | if (h != NULL) | |
dfeffb9f | 507 | name = NULL; |
252b5132 RH |
508 | else |
509 | { | |
510 | name = bfd_elf_string_from_elf_section | |
511 | (input_bfd, symtab_hdr->sh_link, sym->st_name); | |
c3668558 | 512 | |
252b5132 RH |
513 | if (name == NULL) |
514 | break; | |
515 | ||
516 | if (* name == '\0') | |
517 | name = bfd_section_name (input_bfd, sec); | |
518 | } | |
519 | ||
520 | (*info->callbacks->reloc_overflow) | |
dfeffb9f L |
521 | (info, (h ? &h->root : NULL), name, howto->name, |
522 | (bfd_vma) 0, input_bfd, input_section, offset); | |
252b5132 RH |
523 | } |
524 | break; | |
525 | } | |
526 | } | |
527 | } | |
528 | ||
529 | #ifdef DEBUG | |
530 | fprintf (stderr, "\n"); | |
531 | #endif | |
532 | ||
533 | return ret; | |
534 | } | |
535 | \f | |
536 | /* Return the section that should be marked against GC for a given | |
537 | relocation. */ | |
538 | ||
539 | static asection * | |
07adf181 AM |
540 | mcore_elf_gc_mark_hook (asection *sec, |
541 | struct bfd_link_info *info, | |
542 | Elf_Internal_Rela *rel, | |
543 | struct elf_link_hash_entry *h, | |
544 | Elf_Internal_Sym *sym) | |
252b5132 | 545 | { |
07adf181 AM |
546 | if (h != NULL) |
547 | switch (ELF32_R_TYPE (rel->r_info)) | |
548 | { | |
549 | case R_MCORE_GNU_VTINHERIT: | |
550 | case R_MCORE_GNU_VTENTRY: | |
551 | return NULL; | |
552 | } | |
553 | ||
554 | return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); | |
252b5132 RH |
555 | } |
556 | ||
557 | /* Update the got entry reference counts for the section being removed. */ | |
558 | ||
b34976b6 | 559 | static bfd_boolean |
47b0e7ad NC |
560 | mcore_elf_gc_sweep_hook (bfd * abfd ATTRIBUTE_UNUSED, |
561 | struct bfd_link_info * info ATTRIBUTE_UNUSED, | |
562 | asection * sec ATTRIBUTE_UNUSED, | |
563 | const Elf_Internal_Rela * relocs ATTRIBUTE_UNUSED) | |
252b5132 | 564 | { |
b34976b6 | 565 | return TRUE; |
252b5132 RH |
566 | } |
567 | ||
568 | /* Look through the relocs for a section during the first phase. | |
569 | Since we don't do .gots or .plts, we just need to consider the | |
570 | virtual table relocs for gc. */ | |
c3668558 | 571 | |
b34976b6 | 572 | static bfd_boolean |
47b0e7ad NC |
573 | mcore_elf_check_relocs (bfd * abfd, |
574 | struct bfd_link_info * info, | |
575 | asection * sec, | |
576 | const Elf_Internal_Rela * relocs) | |
252b5132 | 577 | { |
b34976b6 | 578 | Elf_Internal_Shdr * symtab_hdr; |
252b5132 RH |
579 | struct elf_link_hash_entry ** sym_hashes; |
580 | struct elf_link_hash_entry ** sym_hashes_end; | |
b34976b6 AM |
581 | const Elf_Internal_Rela * rel; |
582 | const Elf_Internal_Rela * rel_end; | |
c3668558 | 583 | |
1049f94e | 584 | if (info->relocatable) |
b34976b6 | 585 | return TRUE; |
c3668558 | 586 | |
252b5132 RH |
587 | symtab_hdr = & elf_tdata (abfd)->symtab_hdr; |
588 | sym_hashes = elf_sym_hashes (abfd); | |
589 | sym_hashes_end = sym_hashes + symtab_hdr->sh_size / sizeof (Elf32_External_Sym); | |
590 | if (!elf_bad_symtab (abfd)) | |
591 | sym_hashes_end -= symtab_hdr->sh_info; | |
c3668558 | 592 | |
252b5132 | 593 | rel_end = relocs + sec->reloc_count; |
c3668558 | 594 | |
252b5132 RH |
595 | for (rel = relocs; rel < rel_end; rel++) |
596 | { | |
597 | struct elf_link_hash_entry * h; | |
598 | unsigned long r_symndx; | |
c3668558 | 599 | |
252b5132 | 600 | r_symndx = ELF32_R_SYM (rel->r_info); |
c3668558 | 601 | |
252b5132 RH |
602 | if (r_symndx < symtab_hdr->sh_info) |
603 | h = NULL; | |
604 | else | |
973a3492 L |
605 | { |
606 | h = sym_hashes [r_symndx - symtab_hdr->sh_info]; | |
607 | while (h->root.type == bfd_link_hash_indirect | |
608 | || h->root.type == bfd_link_hash_warning) | |
609 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
610 | } | |
c3668558 | 611 | |
252b5132 RH |
612 | switch (ELF32_R_TYPE (rel->r_info)) |
613 | { | |
614 | /* This relocation describes the C++ object vtable hierarchy. | |
615 | Reconstruct it for later use during GC. */ | |
616 | case R_MCORE_GNU_VTINHERIT: | |
c152c796 | 617 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
b34976b6 | 618 | return FALSE; |
252b5132 | 619 | break; |
c3668558 | 620 | |
252b5132 RH |
621 | /* This relocation describes which C++ vtable entries are actually |
622 | used. Record for later use during GC. */ | |
623 | case R_MCORE_GNU_VTENTRY: | |
c152c796 | 624 | if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) |
b34976b6 | 625 | return FALSE; |
252b5132 RH |
626 | break; |
627 | } | |
628 | } | |
c3668558 | 629 | |
b34976b6 | 630 | return TRUE; |
252b5132 RH |
631 | } |
632 | ||
b35d266b | 633 | static const struct bfd_elf_special_section mcore_elf_special_sections[]= |
2f89ff8d | 634 | { |
0112cd26 NC |
635 | { STRING_COMMA_LEN (".ctors"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, |
636 | { STRING_COMMA_LEN (".dtors"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, | |
637 | { NULL, 0, 0, 0, 0 } | |
2f89ff8d L |
638 | }; |
639 | ||
252b5132 RH |
640 | #define TARGET_BIG_SYM bfd_elf32_mcore_big_vec |
641 | #define TARGET_BIG_NAME "elf32-mcore-big" | |
642 | #define TARGET_LITTLE_SYM bfd_elf32_mcore_little_vec | |
643 | #define TARGET_LITTLE_NAME "elf32-mcore-little" | |
644 | ||
645 | #define ELF_ARCH bfd_arch_mcore | |
646 | #define ELF_MACHINE_CODE EM_MCORE | |
647 | #define ELF_MAXPAGESIZE 0x1000 /* 4k, if we ever have 'em */ | |
648 | #define elf_info_to_howto mcore_elf_info_to_howto | |
649 | #define elf_info_to_howto_rel NULL | |
650 | ||
252b5132 RH |
651 | #define bfd_elf32_bfd_merge_private_bfd_data mcore_elf_merge_private_bfd_data |
652 | #define bfd_elf32_bfd_set_private_flags mcore_elf_set_private_flags | |
653 | #define bfd_elf32_bfd_reloc_type_lookup mcore_elf_reloc_type_lookup | |
654 | #define elf_backend_relocate_section mcore_elf_relocate_section | |
655 | #define elf_backend_gc_mark_hook mcore_elf_gc_mark_hook | |
656 | #define elf_backend_gc_sweep_hook mcore_elf_gc_sweep_hook | |
657 | #define elf_backend_check_relocs mcore_elf_check_relocs | |
29ef7005 | 658 | #define elf_backend_special_sections mcore_elf_special_sections |
252b5132 RH |
659 | |
660 | #define elf_backend_can_gc_sections 1 | |
b491616a | 661 | #define elf_backend_rela_normal 1 |
252b5132 RH |
662 | |
663 | #include "elf32-target.h" |