Commit | Line | Data |
---|---|---|
59d23ada | 1 | /* Motorola MCore specific support for 32-bit ELF |
1049f94e | 2 | Copyright 1994, 1995, 1999, 2000, 2001, 2002, 2003 |
b491616a | 3 | Free Software Foundation, Inc. |
252b5132 RH |
4 | |
5 | This file is part of BFD, the Binary File Descriptor library. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program; if not, write to the Free Software | |
19 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
20 | ||
21 | /* This file is based on a preliminary RCE ELF ABI. The | |
22 | information may not match the final RCE ELF ABI. */ | |
23 | ||
24 | #include "bfd.h" | |
25 | #include "sysdep.h" | |
26 | #include "bfdlink.h" | |
27 | #include "libbfd.h" | |
28 | #include "elf-bfd.h" | |
29 | #include "elf/mcore.h" | |
30 | #include <assert.h> | |
31 | ||
f0fe0e16 | 32 | /* RELA relocs are used here... */ |
252b5132 RH |
33 | |
34 | static void mcore_elf_howto_init | |
35 | PARAMS ((void)); | |
36 | static reloc_howto_type * mcore_elf_reloc_type_lookup | |
37 | PARAMS ((bfd *, bfd_reloc_code_real_type)); | |
38 | static void mcore_elf_info_to_howto | |
947216bf | 39 | PARAMS ((bfd *, arelent *, Elf_Internal_Rela *)); |
b34976b6 | 40 | static bfd_boolean mcore_elf_set_private_flags |
252b5132 | 41 | PARAMS ((bfd *, flagword)); |
b34976b6 | 42 | static bfd_boolean mcore_elf_merge_private_bfd_data |
252b5132 RH |
43 | PARAMS ((bfd *, bfd *)); |
44 | static bfd_reloc_status_type mcore_elf_unsupported_reloc | |
45 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); | |
b34976b6 | 46 | static bfd_boolean mcore_elf_relocate_section |
252b5132 RH |
47 | PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, |
48 | Elf_Internal_Rela *, Elf_Internal_Sym *, asection **)); | |
917583ad | 49 | static asection * mcore_elf_gc_mark_hook |
1e2f5b6e | 50 | PARAMS ((asection *, struct bfd_link_info *, Elf_Internal_Rela *, |
917583ad | 51 | struct elf_link_hash_entry *, Elf_Internal_Sym *)); |
b34976b6 | 52 | static bfd_boolean mcore_elf_gc_sweep_hook |
917583ad NC |
53 | PARAMS ((bfd *, struct bfd_link_info *, asection *, |
54 | const Elf_Internal_Rela *)); | |
b34976b6 | 55 | static bfd_boolean mcore_elf_check_relocs |
917583ad NC |
56 | PARAMS ((bfd *, struct bfd_link_info *, asection *, |
57 | const Elf_Internal_Rela *)); | |
252b5132 RH |
58 | |
59 | static reloc_howto_type * mcore_elf_howto_table [(int) R_MCORE_max]; | |
60 | ||
61 | static reloc_howto_type mcore_elf_howto_raw[] = | |
62 | { | |
63 | /* This reloc does nothing. */ | |
64 | HOWTO (R_MCORE_NONE, /* type */ | |
65 | 0, /* rightshift */ | |
66 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
59d23ada | 67 | 32, /* bitsize */ |
b34976b6 | 68 | FALSE, /* pc_relative */ |
252b5132 RH |
69 | 0, /* bitpos */ |
70 | complain_overflow_bitfield, /* complain_on_overflow */ | |
59d23ada | 71 | NULL, /* special_function */ |
252b5132 | 72 | "R_MCORE_NONE", /* name */ |
b34976b6 | 73 | FALSE, /* partial_inplace */ |
252b5132 RH |
74 | 0, /* src_mask */ |
75 | 0, /* dst_mask */ | |
b34976b6 | 76 | FALSE), /* pcrel_offset */ |
252b5132 RH |
77 | |
78 | /* A standard 32 bit relocation. */ | |
79 | HOWTO (R_MCORE_ADDR32, /* type */ | |
80 | 0, /* rightshift */ | |
81 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
82 | 32, /* bitsize */ | |
b34976b6 | 83 | FALSE, /* pc_relative */ |
252b5132 RH |
84 | 0, /* bitpos */ |
85 | complain_overflow_bitfield, /* complain_on_overflow */ | |
86 | bfd_elf_generic_reloc, /* special_function */ | |
87 | "ADDR32", /* name *//* For compatability with coff/pe port. */ | |
b34976b6 | 88 | FALSE, /* partial_inplace */ |
252b5132 RH |
89 | 0x0, /* src_mask */ |
90 | 0xffffffff, /* dst_mask */ | |
b34976b6 | 91 | FALSE), /* pcrel_offset */ |
252b5132 RH |
92 | |
93 | /* 8 bits + 2 zero bits; jmpi/jsri/lrw instructions. | |
c3668558 | 94 | Should not appear in object files. */ |
252b5132 RH |
95 | HOWTO (R_MCORE_PCRELIMM8BY4, /* type */ |
96 | 2, /* rightshift */ | |
97 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
98 | 8, /* bitsize */ | |
b34976b6 | 99 | TRUE, /* pc_relative */ |
252b5132 RH |
100 | 0, /* bitpos */ |
101 | complain_overflow_bitfield, /* complain_on_overflow */ | |
102 | mcore_elf_unsupported_reloc, /* special_function */ | |
103 | "R_MCORE_PCRELIMM8BY4",/* name */ | |
b34976b6 | 104 | FALSE, /* partial_inplace */ |
252b5132 RH |
105 | 0, /* src_mask */ |
106 | 0, /* dst_mask */ | |
b34976b6 | 107 | TRUE), /* pcrel_offset */ |
252b5132 | 108 | |
c3668558 | 109 | /* bsr/bt/bf/br instructions; 11 bits + 1 zero bit |
252b5132 RH |
110 | Span 2k instructions == 4k bytes. |
111 | Only useful pieces at the relocated address are the opcode (5 bits) */ | |
112 | HOWTO (R_MCORE_PCRELIMM11BY2,/* type */ | |
113 | 1, /* rightshift */ | |
114 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
115 | 11, /* bitsize */ | |
b34976b6 | 116 | TRUE, /* pc_relative */ |
252b5132 RH |
117 | 0, /* bitpos */ |
118 | complain_overflow_signed, /* complain_on_overflow */ | |
119 | bfd_elf_generic_reloc, /* special_function */ | |
120 | "R_MCORE_PCRELIMM11BY2",/* name */ | |
b34976b6 | 121 | FALSE, /* partial_inplace */ |
252b5132 RH |
122 | 0x0, /* src_mask */ |
123 | 0x7ff, /* dst_mask */ | |
b34976b6 | 124 | TRUE), /* pcrel_offset */ |
252b5132 | 125 | |
c3668558 | 126 | /* 4 bits + 1 zero bit; 'loopt' instruction only; unsupported. */ |
252b5132 RH |
127 | HOWTO (R_MCORE_PCRELIMM4BY2, /* type */ |
128 | 1, /* rightshift */ | |
129 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
130 | 4, /* bitsize */ | |
b34976b6 | 131 | TRUE, /* pc_relative */ |
252b5132 RH |
132 | 0, /* bitpos */ |
133 | complain_overflow_bitfield, /* complain_on_overflow */ | |
134 | mcore_elf_unsupported_reloc,/* special_function */ | |
135 | "R_MCORE_PCRELIMM4BY2",/* name */ | |
b34976b6 | 136 | FALSE, /* partial_inplace */ |
252b5132 RH |
137 | 0, /* src_mask */ |
138 | 0, /* dst_mask */ | |
b34976b6 | 139 | TRUE), /* pcrel_offset */ |
252b5132 | 140 | |
c3668558 | 141 | /* 32-bit pc-relative. Eventually this will help support PIC code. */ |
252b5132 RH |
142 | HOWTO (R_MCORE_PCREL32, /* type */ |
143 | 0, /* rightshift */ | |
144 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
145 | 32, /* bitsize */ | |
b34976b6 | 146 | TRUE, /* pc_relative */ |
252b5132 RH |
147 | 0, /* bitpos */ |
148 | complain_overflow_bitfield, /* complain_on_overflow */ | |
149 | bfd_elf_generic_reloc, /* special_function */ | |
150 | "R_MCORE_PCREL32", /* name */ | |
b34976b6 | 151 | FALSE, /* partial_inplace */ |
252b5132 RH |
152 | 0x0, /* src_mask */ |
153 | 0xffffffff, /* dst_mask */ | |
b34976b6 | 154 | TRUE), /* pcrel_offset */ |
252b5132 RH |
155 | |
156 | /* Like PCRELIMM11BY2, this relocation indicates that there is a | |
157 | 'jsri' at the specified address. There is a separate relocation | |
c3668558 | 158 | entry for the literal pool entry that it references, but we |
252b5132 RH |
159 | might be able to change the jsri to a bsr if the target turns out |
160 | to be close enough [even though we won't reclaim the literal pool | |
161 | entry, we'll get some runtime efficiency back]. Note that this | |
c3668558 | 162 | is a relocation that we are allowed to safely ignore. */ |
252b5132 RH |
163 | HOWTO (R_MCORE_PCRELJSR_IMM11BY2,/* type */ |
164 | 1, /* rightshift */ | |
165 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
166 | 11, /* bitsize */ | |
b34976b6 | 167 | TRUE, /* pc_relative */ |
252b5132 RH |
168 | 0, /* bitpos */ |
169 | complain_overflow_signed, /* complain_on_overflow */ | |
170 | bfd_elf_generic_reloc, /* special_function */ | |
171 | "R_MCORE_PCRELJSR_IMM11BY2", /* name */ | |
b34976b6 | 172 | FALSE, /* partial_inplace */ |
252b5132 RH |
173 | 0x0, /* src_mask */ |
174 | 0x7ff, /* dst_mask */ | |
b34976b6 | 175 | TRUE), /* pcrel_offset */ |
c3668558 | 176 | |
252b5132 RH |
177 | /* GNU extension to record C++ vtable hierarchy */ |
178 | HOWTO (R_MCORE_GNU_VTINHERIT, /* type */ | |
179 | 0, /* rightshift */ | |
180 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
181 | 0, /* bitsize */ | |
b34976b6 | 182 | FALSE, /* pc_relative */ |
252b5132 RH |
183 | 0, /* bitpos */ |
184 | complain_overflow_dont, /* complain_on_overflow */ | |
185 | NULL, /* special_function */ | |
186 | "R_MCORE_GNU_VTINHERIT", /* name */ | |
b34976b6 | 187 | FALSE, /* partial_inplace */ |
252b5132 RH |
188 | 0, /* src_mask */ |
189 | 0, /* dst_mask */ | |
b34976b6 | 190 | FALSE), /* pcrel_offset */ |
252b5132 RH |
191 | |
192 | /* GNU extension to record C++ vtable member usage */ | |
193 | HOWTO (R_MCORE_GNU_VTENTRY, /* type */ | |
194 | 0, /* rightshift */ | |
195 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
196 | 0, /* bitsize */ | |
b34976b6 | 197 | FALSE, /* pc_relative */ |
252b5132 RH |
198 | 0, /* bitpos */ |
199 | complain_overflow_dont,/* complain_on_overflow */ | |
200 | _bfd_elf_rel_vtable_reloc_fn, /* special_function */ | |
201 | "R_MCORE_GNU_VTENTRY", /* name */ | |
b34976b6 | 202 | FALSE, /* partial_inplace */ |
252b5132 RH |
203 | 0, /* src_mask */ |
204 | 0, /* dst_mask */ | |
b34976b6 | 205 | FALSE), /* pcrel_offset */ |
c3668558 | 206 | |
36797d47 NC |
207 | HOWTO (R_MCORE_RELATIVE, /* type */ |
208 | 0, /* rightshift */ | |
209 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
210 | 32, /* bitsize */ | |
b34976b6 | 211 | FALSE, /* pc_relative */ |
36797d47 NC |
212 | 0, /* bitpos */ |
213 | complain_overflow_signed, /* complain_on_overflow */ | |
214 | NULL, /* special_function */ | |
215 | "R_MCORE_RELATIVE", /* name */ | |
b34976b6 | 216 | TRUE, /* partial_inplace */ |
36797d47 NC |
217 | 0xffffffff, /* src_mask */ |
218 | 0xffffffff, /* dst_mask */ | |
b34976b6 | 219 | FALSE) /* pcrel_offset */ |
252b5132 RH |
220 | }; |
221 | ||
222 | #ifndef NUM_ELEM | |
223 | #define NUM_ELEM(a) (sizeof (a) / sizeof (a)[0]) | |
224 | #endif | |
225 | \f | |
226 | /* Initialize the mcore_elf_howto_table, so that linear accesses can be done. */ | |
227 | static void | |
228 | mcore_elf_howto_init () | |
229 | { | |
230 | unsigned int i; | |
231 | ||
232 | for (i = NUM_ELEM (mcore_elf_howto_raw); i--;) | |
233 | { | |
234 | unsigned int type; | |
c3668558 | 235 | |
252b5132 | 236 | type = mcore_elf_howto_raw[i].type; |
c3668558 | 237 | |
252b5132 | 238 | BFD_ASSERT (type < NUM_ELEM (mcore_elf_howto_table)); |
c3668558 | 239 | |
252b5132 RH |
240 | mcore_elf_howto_table [type] = & mcore_elf_howto_raw [i]; |
241 | } | |
242 | } | |
252b5132 RH |
243 | \f |
244 | static reloc_howto_type * | |
245 | mcore_elf_reloc_type_lookup (abfd, code) | |
5f771d47 | 246 | bfd * abfd ATTRIBUTE_UNUSED; |
252b5132 RH |
247 | bfd_reloc_code_real_type code; |
248 | { | |
249 | enum elf_mcore_reloc_type mcore_reloc = R_MCORE_NONE; | |
250 | ||
251 | switch (code) | |
252 | { | |
253 | case BFD_RELOC_NONE: mcore_reloc = R_MCORE_NONE; break; | |
254 | case BFD_RELOC_32: mcore_reloc = R_MCORE_ADDR32; break; | |
255 | case BFD_RELOC_MCORE_PCREL_IMM8BY4: mcore_reloc = R_MCORE_PCRELIMM8BY4; break; | |
256 | case BFD_RELOC_MCORE_PCREL_IMM11BY2: mcore_reloc = R_MCORE_PCRELIMM11BY2; break; | |
257 | case BFD_RELOC_MCORE_PCREL_IMM4BY2: mcore_reloc = R_MCORE_PCRELIMM4BY2; break; | |
258 | case BFD_RELOC_32_PCREL: mcore_reloc = R_MCORE_PCREL32; break; | |
259 | case BFD_RELOC_MCORE_PCREL_JSR_IMM11BY2: mcore_reloc = R_MCORE_PCRELJSR_IMM11BY2; break; | |
260 | case BFD_RELOC_VTABLE_INHERIT: mcore_reloc = R_MCORE_GNU_VTINHERIT; break; | |
261 | case BFD_RELOC_VTABLE_ENTRY: mcore_reloc = R_MCORE_GNU_VTENTRY; break; | |
36797d47 | 262 | case BFD_RELOC_RVA: mcore_reloc = R_MCORE_RELATIVE; break; |
252b5132 RH |
263 | default: |
264 | return (reloc_howto_type *)NULL; | |
265 | } | |
266 | ||
267 | if (! mcore_elf_howto_table [R_MCORE_PCRELIMM8BY4]) /* Initialize howto table if needed */ | |
268 | mcore_elf_howto_init (); | |
269 | ||
270 | return mcore_elf_howto_table [(int) mcore_reloc]; | |
271 | }; | |
272 | ||
273 | /* Set the howto pointer for a RCE ELF reloc. */ | |
274 | static void | |
275 | mcore_elf_info_to_howto (abfd, cache_ptr, dst) | |
5f771d47 | 276 | bfd * abfd ATTRIBUTE_UNUSED; |
252b5132 | 277 | arelent * cache_ptr; |
947216bf | 278 | Elf_Internal_Rela * dst; |
252b5132 RH |
279 | { |
280 | if (! mcore_elf_howto_table [R_MCORE_PCRELIMM8BY4]) /* Initialize howto table if needed */ | |
281 | mcore_elf_howto_init (); | |
282 | ||
283 | BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_MCORE_max); | |
c3668558 | 284 | |
252b5132 RH |
285 | cache_ptr->howto = mcore_elf_howto_table [ELF32_R_TYPE (dst->r_info)]; |
286 | } | |
287 | ||
c3668558 | 288 | /* Function to set whether a module needs the -mrelocatable bit set. */ |
b34976b6 | 289 | static bfd_boolean |
252b5132 RH |
290 | mcore_elf_set_private_flags (abfd, flags) |
291 | bfd * abfd; | |
292 | flagword flags; | |
293 | { | |
294 | BFD_ASSERT (! elf_flags_init (abfd) | |
295 | || elf_elfheader (abfd)->e_flags == flags); | |
296 | ||
297 | elf_elfheader (abfd)->e_flags = flags; | |
b34976b6 AM |
298 | elf_flags_init (abfd) = TRUE; |
299 | return TRUE; | |
252b5132 RH |
300 | } |
301 | ||
252b5132 RH |
302 | /* Merge backend specific data from an object file to the output |
303 | object file when linking. */ | |
b34976b6 | 304 | static bfd_boolean |
252b5132 RH |
305 | mcore_elf_merge_private_bfd_data (ibfd, obfd) |
306 | bfd * ibfd; | |
307 | bfd * obfd; | |
308 | { | |
309 | flagword old_flags; | |
310 | flagword new_flags; | |
252b5132 RH |
311 | |
312 | /* Check if we have the same endianess */ | |
82e51918 | 313 | if (! _bfd_generic_verify_endian_match (ibfd, obfd)) |
b34976b6 | 314 | return FALSE; |
252b5132 RH |
315 | |
316 | if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour | |
317 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) | |
b34976b6 | 318 | return TRUE; |
252b5132 RH |
319 | |
320 | new_flags = elf_elfheader (ibfd)->e_flags; | |
321 | old_flags = elf_elfheader (obfd)->e_flags; | |
c3668558 | 322 | |
252b5132 RH |
323 | if (! elf_flags_init (obfd)) /* First call, no flags set */ |
324 | { | |
b34976b6 | 325 | elf_flags_init (obfd) = TRUE; |
252b5132 RH |
326 | elf_elfheader (obfd)->e_flags = new_flags; |
327 | } | |
328 | else if (new_flags == old_flags) /* Compatible flags are ok */ | |
329 | ; | |
5f771d47 ILT |
330 | else |
331 | { | |
332 | /* FIXME */ | |
333 | } | |
334 | ||
b34976b6 | 335 | return TRUE; |
252b5132 | 336 | } |
252b5132 RH |
337 | \f |
338 | /* Don't pretend we can deal with unsupported relocs. */ | |
339 | ||
252b5132 RH |
340 | static bfd_reloc_status_type |
341 | mcore_elf_unsupported_reloc (abfd, reloc_entry, symbol, data, input_section, | |
342 | output_bfd, error_message) | |
343 | bfd * abfd; | |
344 | arelent * reloc_entry; | |
5f771d47 ILT |
345 | asymbol * symbol ATTRIBUTE_UNUSED; |
346 | PTR data ATTRIBUTE_UNUSED; | |
347 | asection * input_section ATTRIBUTE_UNUSED; | |
348 | bfd * output_bfd ATTRIBUTE_UNUSED; | |
349 | char ** error_message ATTRIBUTE_UNUSED; | |
252b5132 RH |
350 | { |
351 | BFD_ASSERT (reloc_entry->howto != (reloc_howto_type *)0); | |
c3668558 | 352 | |
252b5132 | 353 | _bfd_error_handler (_("%s: Relocation %s (%d) is not currently supported.\n"), |
8f615d07 | 354 | bfd_archive_filename (abfd), |
252b5132 RH |
355 | reloc_entry->howto->name, |
356 | reloc_entry->howto->type); | |
357 | ||
358 | return bfd_reloc_notsupported; | |
359 | } | |
252b5132 RH |
360 | \f |
361 | /* The RELOCATE_SECTION function is called by the ELF backend linker | |
362 | to handle the relocations for a section. | |
363 | ||
364 | The relocs are always passed as Rela structures; if the section | |
365 | actually uses Rel structures, the r_addend field will always be | |
366 | zero. | |
367 | ||
368 | This function is responsible for adjust the section contents as | |
369 | necessary, and (if using Rela relocs and generating a | |
1049f94e | 370 | relocatable output file) adjusting the reloc addend as |
252b5132 RH |
371 | necessary. |
372 | ||
373 | This function does not have to worry about setting the reloc | |
374 | address or the reloc symbol index. | |
375 | ||
376 | LOCAL_SYMS is a pointer to the swapped in local symbols. | |
377 | ||
378 | LOCAL_SECTIONS is an array giving the section in the input file | |
379 | corresponding to the st_shndx field of each local symbol. | |
380 | ||
381 | The global hash table entry for the global symbols can be found | |
382 | via elf_sym_hashes (input_bfd). | |
383 | ||
1049f94e | 384 | When generating relocatable output, this function must handle |
252b5132 RH |
385 | STB_LOCAL/STT_SECTION symbols specially. The output symbol is |
386 | going to be the section symbol corresponding to the output | |
387 | section, which means that the addend must be adjusted | |
388 | accordingly. */ | |
389 | ||
b34976b6 | 390 | static bfd_boolean |
252b5132 | 391 | mcore_elf_relocate_section (output_bfd, info, input_bfd, input_section, |
b34976b6 | 392 | contents, relocs, local_syms, local_sections) |
f8df10f4 | 393 | bfd * output_bfd; |
252b5132 RH |
394 | struct bfd_link_info * info; |
395 | bfd * input_bfd; | |
396 | asection * input_section; | |
397 | bfd_byte * contents; | |
398 | Elf_Internal_Rela * relocs; | |
399 | Elf_Internal_Sym * local_syms; | |
400 | asection ** local_sections; | |
401 | { | |
b34976b6 | 402 | Elf_Internal_Shdr * symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr; |
252b5132 | 403 | struct elf_link_hash_entry ** sym_hashes = elf_sym_hashes (input_bfd); |
b34976b6 AM |
404 | Elf_Internal_Rela * rel = relocs; |
405 | Elf_Internal_Rela * relend = relocs + input_section->reloc_count; | |
406 | bfd_boolean ret = TRUE; | |
252b5132 RH |
407 | |
408 | #ifdef DEBUG | |
409 | fprintf (stderr, | |
410 | "mcore_elf_relocate_section called for %s section %s, %ld relocations%s\n", | |
8f615d07 | 411 | bfd_archive_filename (input_bfd), |
252b5132 RH |
412 | bfd_section_name(input_bfd, input_section), |
413 | (long) input_section->reloc_count, | |
1049f94e | 414 | (info->relocatable) ? " (relocatable)" : ""); |
252b5132 RH |
415 | #endif |
416 | ||
1049f94e | 417 | if (info->relocatable) |
b34976b6 | 418 | return TRUE; |
b491616a | 419 | |
252b5132 RH |
420 | if (! mcore_elf_howto_table [R_MCORE_PCRELIMM8BY4]) /* Initialize howto table if needed */ |
421 | mcore_elf_howto_init (); | |
422 | ||
423 | for (; rel < relend; rel++) | |
424 | { | |
425 | enum elf_mcore_reloc_type r_type = (enum elf_mcore_reloc_type) ELF32_R_TYPE (rel->r_info); | |
426 | bfd_vma offset = rel->r_offset; | |
427 | bfd_vma addend = rel->r_addend; | |
428 | bfd_reloc_status_type r = bfd_reloc_other; | |
429 | asection * sec = (asection *) 0; | |
430 | reloc_howto_type * howto; | |
431 | bfd_vma relocation; | |
432 | Elf_Internal_Sym * sym = (Elf_Internal_Sym *) 0; | |
433 | unsigned long r_symndx; | |
434 | struct elf_link_hash_entry * h = (struct elf_link_hash_entry *) 0; | |
86033394 | 435 | unsigned short oldinst = 0; |
c3668558 | 436 | |
252b5132 RH |
437 | /* Unknown relocation handling */ |
438 | if ((unsigned) r_type >= (unsigned) R_MCORE_max | |
439 | || ! mcore_elf_howto_table [(int)r_type]) | |
440 | { | |
441 | _bfd_error_handler (_("%s: Unknown relocation type %d\n"), | |
8f615d07 | 442 | bfd_archive_filename (input_bfd), |
252b5132 RH |
443 | (int) r_type); |
444 | ||
445 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 446 | ret = FALSE; |
252b5132 RH |
447 | continue; |
448 | } | |
c3668558 | 449 | |
252b5132 RH |
450 | howto = mcore_elf_howto_table [(int) r_type]; |
451 | r_symndx = ELF32_R_SYM (rel->r_info); | |
c3668558 | 452 | |
a022216b | 453 | /* Complain about known relocation that are not yet supported. */ |
252b5132 RH |
454 | if (howto->special_function == mcore_elf_unsupported_reloc) |
455 | { | |
456 | _bfd_error_handler (_("%s: Relocation %s (%d) is not currently supported.\n"), | |
8f615d07 | 457 | bfd_archive_filename (input_bfd), |
252b5132 RH |
458 | howto->name, |
459 | (int)r_type); | |
460 | ||
461 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 462 | ret = FALSE; |
252b5132 RH |
463 | continue; |
464 | } | |
465 | ||
466 | if (r_symndx < symtab_hdr->sh_info) | |
467 | { | |
468 | sym = local_syms + r_symndx; | |
469 | sec = local_sections [r_symndx]; | |
8517fae7 | 470 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); |
f8df10f4 | 471 | addend = rel->r_addend; |
252b5132 RH |
472 | } |
473 | else | |
474 | { | |
475 | h = sym_hashes [r_symndx - symtab_hdr->sh_info]; | |
476 | if ( h->root.type == bfd_link_hash_defined | |
477 | || h->root.type == bfd_link_hash_defweak) | |
478 | { | |
479 | sec = h->root.u.def.section; | |
480 | relocation = (h->root.u.def.value | |
481 | + sec->output_section->vma | |
482 | + sec->output_offset); | |
483 | } | |
484 | else if (h->root.type == bfd_link_hash_undefweak) | |
485 | relocation = 0; | |
3a27a730 L |
486 | else if (info->shared |
487 | && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) | |
252b5132 RH |
488 | relocation = 0; |
489 | else | |
490 | { | |
491 | if (! ((*info->callbacks->undefined_symbol) | |
492 | (info, h->root.root.string, input_bfd, | |
b34976b6 AM |
493 | input_section, rel->r_offset, TRUE))) |
494 | return FALSE; | |
252b5132 | 495 | |
b34976b6 | 496 | ret = FALSE; |
252b5132 RH |
497 | continue; |
498 | } | |
499 | } | |
500 | ||
501 | switch (r_type) | |
502 | { | |
503 | default: | |
252b5132 RH |
504 | break; |
505 | ||
506 | case R_MCORE_PCRELJSR_IMM11BY2: | |
507 | oldinst = bfd_get_16 (input_bfd, contents + offset); | |
508 | #define MCORE_INST_BSR 0xF800 | |
dc810e39 | 509 | bfd_put_16 (input_bfd, (bfd_vma) MCORE_INST_BSR, contents + offset); |
252b5132 RH |
510 | break; |
511 | } | |
512 | ||
252b5132 RH |
513 | #ifdef DEBUG |
514 | fprintf (stderr, "\ttype = %s (%d), symbol index = %ld, offset = %ld, addend = %ld\n", | |
515 | howto->name, r_type, r_symndx, (long) offset, (long) addend); | |
516 | #endif | |
517 | ||
518 | r = _bfd_final_link_relocate | |
519 | (howto, input_bfd, input_section, contents, offset, relocation, addend); | |
520 | ||
521 | if (r != bfd_reloc_ok && r_type == R_MCORE_PCRELJSR_IMM11BY2) | |
522 | { | |
523 | /* Wasn't ok, back it out and give up. */ | |
dc810e39 | 524 | bfd_put_16 (input_bfd, (bfd_vma) oldinst, contents + offset); |
252b5132 RH |
525 | r = bfd_reloc_ok; |
526 | } | |
c3668558 | 527 | |
252b5132 RH |
528 | if (r != bfd_reloc_ok) |
529 | { | |
b34976b6 | 530 | ret = FALSE; |
c3668558 | 531 | |
252b5132 RH |
532 | switch (r) |
533 | { | |
534 | default: | |
535 | break; | |
536 | ||
537 | case bfd_reloc_overflow: | |
538 | { | |
539 | const char * name; | |
540 | ||
541 | if (h != NULL) | |
542 | name = h->root.root.string; | |
543 | else | |
544 | { | |
545 | name = bfd_elf_string_from_elf_section | |
546 | (input_bfd, symtab_hdr->sh_link, sym->st_name); | |
c3668558 | 547 | |
252b5132 RH |
548 | if (name == NULL) |
549 | break; | |
550 | ||
551 | if (* name == '\0') | |
552 | name = bfd_section_name (input_bfd, sec); | |
553 | } | |
554 | ||
555 | (*info->callbacks->reloc_overflow) | |
556 | (info, name, howto->name, (bfd_vma) 0, input_bfd, input_section, | |
557 | offset); | |
558 | } | |
559 | break; | |
560 | } | |
561 | } | |
562 | } | |
563 | ||
564 | #ifdef DEBUG | |
565 | fprintf (stderr, "\n"); | |
566 | #endif | |
567 | ||
568 | return ret; | |
569 | } | |
570 | \f | |
571 | /* Return the section that should be marked against GC for a given | |
572 | relocation. */ | |
573 | ||
574 | static asection * | |
1e2f5b6e AM |
575 | mcore_elf_gc_mark_hook (sec, info, rel, h, sym) |
576 | asection * sec; | |
5f771d47 | 577 | struct bfd_link_info * info ATTRIBUTE_UNUSED; |
252b5132 RH |
578 | Elf_Internal_Rela * rel; |
579 | struct elf_link_hash_entry * h; | |
580 | Elf_Internal_Sym * sym; | |
581 | { | |
582 | if (h != NULL) | |
583 | { | |
584 | switch (ELF32_R_TYPE (rel->r_info)) | |
585 | { | |
586 | case R_MCORE_GNU_VTINHERIT: | |
587 | case R_MCORE_GNU_VTENTRY: | |
588 | break; | |
589 | ||
590 | default: | |
591 | switch (h->root.type) | |
592 | { | |
593 | case bfd_link_hash_defined: | |
594 | case bfd_link_hash_defweak: | |
595 | return h->root.u.def.section; | |
c3668558 | 596 | |
252b5132 RH |
597 | case bfd_link_hash_common: |
598 | return h->root.u.c.p->section; | |
e049a0de ILT |
599 | |
600 | default: | |
601 | break; | |
252b5132 RH |
602 | } |
603 | } | |
604 | } | |
605 | else | |
1e2f5b6e | 606 | return bfd_section_from_elf_index (sec->owner, sym->st_shndx); |
252b5132 RH |
607 | |
608 | return NULL; | |
609 | } | |
610 | ||
611 | /* Update the got entry reference counts for the section being removed. */ | |
612 | ||
b34976b6 | 613 | static bfd_boolean |
252b5132 | 614 | mcore_elf_gc_sweep_hook (abfd, info, sec, relocs) |
b34976b6 AM |
615 | bfd * abfd ATTRIBUTE_UNUSED; |
616 | struct bfd_link_info * info ATTRIBUTE_UNUSED; | |
617 | asection * sec ATTRIBUTE_UNUSED; | |
5f771d47 | 618 | const Elf_Internal_Rela * relocs ATTRIBUTE_UNUSED; |
252b5132 | 619 | { |
b34976b6 | 620 | return TRUE; |
252b5132 RH |
621 | } |
622 | ||
623 | /* Look through the relocs for a section during the first phase. | |
624 | Since we don't do .gots or .plts, we just need to consider the | |
625 | virtual table relocs for gc. */ | |
c3668558 | 626 | |
b34976b6 | 627 | static bfd_boolean |
252b5132 RH |
628 | mcore_elf_check_relocs (abfd, info, sec, relocs) |
629 | bfd * abfd; | |
630 | struct bfd_link_info * info; | |
631 | asection * sec; | |
632 | const Elf_Internal_Rela * relocs; | |
633 | { | |
b34976b6 | 634 | Elf_Internal_Shdr * symtab_hdr; |
252b5132 RH |
635 | struct elf_link_hash_entry ** sym_hashes; |
636 | struct elf_link_hash_entry ** sym_hashes_end; | |
b34976b6 AM |
637 | const Elf_Internal_Rela * rel; |
638 | const Elf_Internal_Rela * rel_end; | |
c3668558 | 639 | |
1049f94e | 640 | if (info->relocatable) |
b34976b6 | 641 | return TRUE; |
c3668558 | 642 | |
252b5132 RH |
643 | symtab_hdr = & elf_tdata (abfd)->symtab_hdr; |
644 | sym_hashes = elf_sym_hashes (abfd); | |
645 | sym_hashes_end = sym_hashes + symtab_hdr->sh_size / sizeof (Elf32_External_Sym); | |
646 | if (!elf_bad_symtab (abfd)) | |
647 | sym_hashes_end -= symtab_hdr->sh_info; | |
c3668558 | 648 | |
252b5132 | 649 | rel_end = relocs + sec->reloc_count; |
c3668558 | 650 | |
252b5132 RH |
651 | for (rel = relocs; rel < rel_end; rel++) |
652 | { | |
653 | struct elf_link_hash_entry * h; | |
654 | unsigned long r_symndx; | |
c3668558 | 655 | |
252b5132 | 656 | r_symndx = ELF32_R_SYM (rel->r_info); |
c3668558 | 657 | |
252b5132 RH |
658 | if (r_symndx < symtab_hdr->sh_info) |
659 | h = NULL; | |
660 | else | |
661 | h = sym_hashes [r_symndx - symtab_hdr->sh_info]; | |
c3668558 | 662 | |
252b5132 RH |
663 | switch (ELF32_R_TYPE (rel->r_info)) |
664 | { | |
665 | /* This relocation describes the C++ object vtable hierarchy. | |
666 | Reconstruct it for later use during GC. */ | |
667 | case R_MCORE_GNU_VTINHERIT: | |
668 | if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) | |
b34976b6 | 669 | return FALSE; |
252b5132 | 670 | break; |
c3668558 | 671 | |
252b5132 RH |
672 | /* This relocation describes which C++ vtable entries are actually |
673 | used. Record for later use during GC. */ | |
674 | case R_MCORE_GNU_VTENTRY: | |
675 | if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_addend)) | |
b34976b6 | 676 | return FALSE; |
252b5132 RH |
677 | break; |
678 | } | |
679 | } | |
c3668558 | 680 | |
b34976b6 | 681 | return TRUE; |
252b5132 RH |
682 | } |
683 | ||
2f89ff8d L |
684 | static struct bfd_elf_special_section const mcore_elf_special_sections[]= |
685 | { | |
7dcb9820 AM |
686 | { ".ctors", 6, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, |
687 | { ".dtors", 6, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, | |
688 | { NULL, 0, 0, 0, 0 } | |
2f89ff8d L |
689 | }; |
690 | ||
252b5132 RH |
691 | #define TARGET_BIG_SYM bfd_elf32_mcore_big_vec |
692 | #define TARGET_BIG_NAME "elf32-mcore-big" | |
693 | #define TARGET_LITTLE_SYM bfd_elf32_mcore_little_vec | |
694 | #define TARGET_LITTLE_NAME "elf32-mcore-little" | |
695 | ||
696 | #define ELF_ARCH bfd_arch_mcore | |
697 | #define ELF_MACHINE_CODE EM_MCORE | |
698 | #define ELF_MAXPAGESIZE 0x1000 /* 4k, if we ever have 'em */ | |
699 | #define elf_info_to_howto mcore_elf_info_to_howto | |
700 | #define elf_info_to_howto_rel NULL | |
701 | ||
252b5132 RH |
702 | #define bfd_elf32_bfd_merge_private_bfd_data mcore_elf_merge_private_bfd_data |
703 | #define bfd_elf32_bfd_set_private_flags mcore_elf_set_private_flags | |
704 | #define bfd_elf32_bfd_reloc_type_lookup mcore_elf_reloc_type_lookup | |
705 | #define elf_backend_relocate_section mcore_elf_relocate_section | |
706 | #define elf_backend_gc_mark_hook mcore_elf_gc_mark_hook | |
707 | #define elf_backend_gc_sweep_hook mcore_elf_gc_sweep_hook | |
708 | #define elf_backend_check_relocs mcore_elf_check_relocs | |
2f89ff8d | 709 | #define elf_backend_special_sections mcore_elf_special_sections |
252b5132 RH |
710 | |
711 | #define elf_backend_can_gc_sections 1 | |
b491616a | 712 | #define elf_backend_rela_normal 1 |
252b5132 RH |
713 | |
714 | #include "elf32-target.h" |