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e9f53129 AM |
1 | /* SPU specific support for 32-bit ELF |
2 | ||
78859468 | 3 | Copyright 2006, 2007 Free Software Foundation, Inc. |
e9f53129 AM |
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 along | |
18 | with this program; if not, write to the Free Software Foundation, Inc., | |
19 | 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ | |
20 | ||
21 | #include "bfd.h" | |
22 | #include "sysdep.h" | |
23 | #include "bfdlink.h" | |
24 | #include "libbfd.h" | |
25 | #include "elf-bfd.h" | |
26 | #include "elf/spu.h" | |
27 | #include "elf32-spu.h" | |
28 | ||
29 | /* We use RELA style relocs. Don't define USE_REL. */ | |
30 | ||
31 | static bfd_reloc_status_type spu_elf_rel9 (bfd *, arelent *, asymbol *, | |
32 | void *, asection *, | |
33 | bfd *, char **); | |
34 | ||
35 | /* Values of type 'enum elf_spu_reloc_type' are used to index this | |
36 | array, so it must be declared in the order of that type. */ | |
37 | ||
38 | static reloc_howto_type elf_howto_table[] = { | |
39 | HOWTO (R_SPU_NONE, 0, 0, 0, FALSE, 0, complain_overflow_dont, | |
40 | bfd_elf_generic_reloc, "SPU_NONE", | |
41 | FALSE, 0, 0x00000000, FALSE), | |
42 | HOWTO (R_SPU_ADDR10, 4, 2, 10, FALSE, 14, complain_overflow_bitfield, | |
43 | bfd_elf_generic_reloc, "SPU_ADDR10", | |
44 | FALSE, 0, 0x00ffc000, FALSE), | |
45 | HOWTO (R_SPU_ADDR16, 2, 2, 16, FALSE, 7, complain_overflow_bitfield, | |
46 | bfd_elf_generic_reloc, "SPU_ADDR16", | |
47 | FALSE, 0, 0x007fff80, FALSE), | |
48 | HOWTO (R_SPU_ADDR16_HI, 16, 2, 16, FALSE, 7, complain_overflow_bitfield, | |
49 | bfd_elf_generic_reloc, "SPU_ADDR16_HI", | |
50 | FALSE, 0, 0x007fff80, FALSE), | |
51 | HOWTO (R_SPU_ADDR16_LO, 0, 2, 16, FALSE, 7, complain_overflow_dont, | |
52 | bfd_elf_generic_reloc, "SPU_ADDR16_LO", | |
53 | FALSE, 0, 0x007fff80, FALSE), | |
54 | HOWTO (R_SPU_ADDR18, 0, 2, 18, FALSE, 7, complain_overflow_bitfield, | |
55 | bfd_elf_generic_reloc, "SPU_ADDR18", | |
56 | FALSE, 0, 0x01ffff80, FALSE), | |
57 | HOWTO (R_SPU_ADDR32, 0, 2, 32, FALSE, 0, complain_overflow_dont, | |
58 | bfd_elf_generic_reloc, "SPU_ADDR32", | |
59 | FALSE, 0, 0xffffffff, FALSE), | |
60 | HOWTO (R_SPU_REL16, 2, 2, 16, TRUE, 7, complain_overflow_bitfield, | |
61 | bfd_elf_generic_reloc, "SPU_REL16", | |
62 | FALSE, 0, 0x007fff80, TRUE), | |
63 | HOWTO (R_SPU_ADDR7, 0, 2, 7, FALSE, 14, complain_overflow_dont, | |
64 | bfd_elf_generic_reloc, "SPU_ADDR7", | |
65 | FALSE, 0, 0x001fc000, FALSE), | |
66 | HOWTO (R_SPU_REL9, 2, 2, 9, TRUE, 0, complain_overflow_signed, | |
67 | spu_elf_rel9, "SPU_REL9", | |
68 | FALSE, 0, 0x0180007f, TRUE), | |
69 | HOWTO (R_SPU_REL9I, 2, 2, 9, TRUE, 0, complain_overflow_signed, | |
70 | spu_elf_rel9, "SPU_REL9I", | |
71 | FALSE, 0, 0x0000c07f, TRUE), | |
72 | HOWTO (R_SPU_ADDR10I, 0, 2, 10, FALSE, 14, complain_overflow_signed, | |
73 | bfd_elf_generic_reloc, "SPU_ADDR10I", | |
74 | FALSE, 0, 0x00ffc000, FALSE), | |
75 | HOWTO (R_SPU_ADDR16I, 0, 2, 16, FALSE, 7, complain_overflow_signed, | |
76 | bfd_elf_generic_reloc, "SPU_ADDR16I", | |
77 | FALSE, 0, 0x007fff80, FALSE), | |
78 | HOWTO (R_SPU_REL32, 0, 2, 32, TRUE, 0, complain_overflow_dont, | |
79 | bfd_elf_generic_reloc, "SPU_REL32", | |
80 | FALSE, 0, 0xffffffff, TRUE), | |
81 | }; | |
82 | ||
83 | static struct bfd_elf_special_section const spu_elf_special_sections[] = { | |
84 | { ".toe", 4, 0, SHT_NOBITS, SHF_ALLOC }, | |
85 | { NULL, 0, 0, 0, 0 } | |
86 | }; | |
87 | ||
88 | static enum elf_spu_reloc_type | |
89 | spu_elf_bfd_to_reloc_type (bfd_reloc_code_real_type code) | |
90 | { | |
91 | switch (code) | |
92 | { | |
93 | default: | |
94 | return R_SPU_NONE; | |
95 | case BFD_RELOC_SPU_IMM10W: | |
96 | return R_SPU_ADDR10; | |
97 | case BFD_RELOC_SPU_IMM16W: | |
98 | return R_SPU_ADDR16; | |
99 | case BFD_RELOC_SPU_LO16: | |
100 | return R_SPU_ADDR16_LO; | |
101 | case BFD_RELOC_SPU_HI16: | |
102 | return R_SPU_ADDR16_HI; | |
103 | case BFD_RELOC_SPU_IMM18: | |
104 | return R_SPU_ADDR18; | |
105 | case BFD_RELOC_SPU_PCREL16: | |
106 | return R_SPU_REL16; | |
107 | case BFD_RELOC_SPU_IMM7: | |
108 | return R_SPU_ADDR7; | |
109 | case BFD_RELOC_SPU_IMM8: | |
110 | return R_SPU_NONE; | |
111 | case BFD_RELOC_SPU_PCREL9a: | |
112 | return R_SPU_REL9; | |
113 | case BFD_RELOC_SPU_PCREL9b: | |
114 | return R_SPU_REL9I; | |
115 | case BFD_RELOC_SPU_IMM10: | |
116 | return R_SPU_ADDR10I; | |
117 | case BFD_RELOC_SPU_IMM16: | |
118 | return R_SPU_ADDR16I; | |
119 | case BFD_RELOC_32: | |
120 | return R_SPU_ADDR32; | |
121 | case BFD_RELOC_32_PCREL: | |
122 | return R_SPU_REL32; | |
123 | } | |
124 | } | |
125 | ||
126 | static void | |
127 | spu_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, | |
128 | arelent *cache_ptr, | |
129 | Elf_Internal_Rela *dst) | |
130 | { | |
131 | enum elf_spu_reloc_type r_type; | |
132 | ||
133 | r_type = (enum elf_spu_reloc_type) ELF32_R_TYPE (dst->r_info); | |
134 | BFD_ASSERT (r_type < R_SPU_max); | |
135 | cache_ptr->howto = &elf_howto_table[(int) r_type]; | |
136 | } | |
137 | ||
138 | static reloc_howto_type * | |
139 | spu_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, | |
140 | bfd_reloc_code_real_type code) | |
141 | { | |
142 | return elf_howto_table + spu_elf_bfd_to_reloc_type (code); | |
143 | } | |
144 | ||
145 | /* Apply R_SPU_REL9 and R_SPU_REL9I relocs. */ | |
146 | ||
147 | static bfd_reloc_status_type | |
148 | spu_elf_rel9 (bfd *abfd, arelent *reloc_entry, asymbol *symbol, | |
149 | void *data, asection *input_section, | |
150 | bfd *output_bfd, char **error_message) | |
151 | { | |
152 | bfd_size_type octets; | |
153 | bfd_vma val; | |
154 | long insn; | |
155 | ||
156 | /* If this is a relocatable link (output_bfd test tells us), just | |
157 | call the generic function. Any adjustment will be done at final | |
158 | link time. */ | |
159 | if (output_bfd != NULL) | |
160 | return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, | |
161 | input_section, output_bfd, error_message); | |
162 | ||
163 | if (reloc_entry->address > bfd_get_section_limit (abfd, input_section)) | |
164 | return bfd_reloc_outofrange; | |
165 | octets = reloc_entry->address * bfd_octets_per_byte (abfd); | |
166 | ||
167 | /* Get symbol value. */ | |
168 | val = 0; | |
169 | if (!bfd_is_com_section (symbol->section)) | |
170 | val = symbol->value; | |
171 | if (symbol->section->output_section) | |
172 | val += symbol->section->output_section->vma; | |
173 | ||
174 | val += reloc_entry->addend; | |
175 | ||
176 | /* Make it pc-relative. */ | |
177 | val -= input_section->output_section->vma + input_section->output_offset; | |
178 | ||
179 | val >>= 2; | |
180 | if (val + 256 >= 512) | |
181 | return bfd_reloc_overflow; | |
182 | ||
183 | insn = bfd_get_32 (abfd, (bfd_byte *) data + octets); | |
184 | ||
185 | /* Move two high bits of value to REL9I and REL9 position. | |
186 | The mask will take care of selecting the right field. */ | |
187 | val = (val & 0x7f) | ((val & 0x180) << 7) | ((val & 0x180) << 16); | |
188 | insn &= ~reloc_entry->howto->dst_mask; | |
189 | insn |= val & reloc_entry->howto->dst_mask; | |
190 | bfd_put_32 (abfd, insn, (bfd_byte *) data + octets); | |
191 | return bfd_reloc_ok; | |
192 | } | |
193 | ||
194 | static bfd_boolean | |
195 | spu_elf_new_section_hook (bfd *abfd, asection *sec) | |
196 | { | |
197 | if (!sec->used_by_bfd) | |
198 | { | |
199 | struct _spu_elf_section_data *sdata; | |
200 | ||
201 | sdata = bfd_zalloc (abfd, sizeof (*sdata)); | |
202 | if (sdata == NULL) | |
203 | return FALSE; | |
204 | sec->used_by_bfd = sdata; | |
205 | } | |
206 | ||
207 | return _bfd_elf_new_section_hook (abfd, sec); | |
208 | } | |
209 | ||
210 | /* Specially mark defined symbols named _EAR_* with BSF_KEEP so that | |
211 | strip --strip-unneeded will not remove them. */ | |
212 | ||
213 | static void | |
214 | spu_elf_backend_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED, asymbol *sym) | |
215 | { | |
216 | if (sym->name != NULL | |
217 | && sym->section != bfd_abs_section_ptr | |
218 | && strncmp (sym->name, "_EAR_", 5) == 0) | |
219 | sym->flags |= BSF_KEEP; | |
220 | } | |
221 | ||
222 | /* SPU ELF linker hash table. */ | |
223 | ||
224 | struct spu_link_hash_table | |
225 | { | |
226 | struct elf_link_hash_table elf; | |
227 | ||
228 | /* The stub hash table. */ | |
229 | struct bfd_hash_table stub_hash_table; | |
230 | ||
231 | /* Shortcuts to overlay sections. */ | |
232 | asection *stub; | |
233 | asection *ovtab; | |
234 | ||
235 | struct elf_link_hash_entry *ovly_load; | |
236 | ||
237 | /* An array of two output sections per overlay region, chosen such that | |
238 | the first section vma is the overlay buffer vma (ie. the section has | |
239 | the lowest vma in the group that occupy the region), and the second | |
240 | section vma+size specifies the end of the region. We keep pointers | |
241 | to sections like this because section vmas may change when laying | |
242 | them out. */ | |
243 | asection **ovl_region; | |
244 | ||
245 | /* Number of overlay buffers. */ | |
246 | unsigned int num_buf; | |
247 | ||
248 | /* Total number of overlays. */ | |
249 | unsigned int num_overlays; | |
250 | ||
251 | /* Set if we should emit symbols for stubs. */ | |
252 | unsigned int emit_stub_syms:1; | |
253 | ||
254 | /* Set if we want stubs on calls out of overlay regions to | |
255 | non-overlay regions. */ | |
256 | unsigned int non_overlay_stubs : 1; | |
257 | ||
258 | /* Set on error. */ | |
259 | unsigned int stub_overflow : 1; | |
260 | }; | |
261 | ||
262 | #define spu_hash_table(p) \ | |
263 | ((struct spu_link_hash_table *) ((p)->hash)) | |
264 | ||
265 | struct spu_stub_hash_entry | |
266 | { | |
267 | struct bfd_hash_entry root; | |
268 | ||
269 | /* Destination of this stub. */ | |
270 | asection *target_section; | |
271 | bfd_vma target_off; | |
272 | ||
273 | /* Offset of entry in stub section. */ | |
274 | bfd_vma off; | |
275 | ||
276 | /* Offset from this stub to stub that loads the overlay index. */ | |
277 | bfd_vma delta; | |
278 | }; | |
279 | ||
280 | /* Create an entry in a spu stub hash table. */ | |
281 | ||
282 | static struct bfd_hash_entry * | |
283 | stub_hash_newfunc (struct bfd_hash_entry *entry, | |
284 | struct bfd_hash_table *table, | |
285 | const char *string) | |
286 | { | |
287 | /* Allocate the structure if it has not already been allocated by a | |
288 | subclass. */ | |
289 | if (entry == NULL) | |
290 | { | |
291 | entry = bfd_hash_allocate (table, sizeof (struct spu_stub_hash_entry)); | |
292 | if (entry == NULL) | |
293 | return entry; | |
294 | } | |
295 | ||
296 | /* Call the allocation method of the superclass. */ | |
297 | entry = bfd_hash_newfunc (entry, table, string); | |
298 | if (entry != NULL) | |
299 | { | |
300 | struct spu_stub_hash_entry *sh = (struct spu_stub_hash_entry *) entry; | |
301 | ||
302 | sh->target_section = NULL; | |
303 | sh->target_off = 0; | |
304 | sh->off = 0; | |
305 | sh->delta = 0; | |
306 | } | |
307 | ||
308 | return entry; | |
309 | } | |
310 | ||
311 | /* Create a spu ELF linker hash table. */ | |
312 | ||
313 | static struct bfd_link_hash_table * | |
314 | spu_elf_link_hash_table_create (bfd *abfd) | |
315 | { | |
316 | struct spu_link_hash_table *htab; | |
317 | ||
318 | htab = bfd_malloc (sizeof (*htab)); | |
319 | if (htab == NULL) | |
320 | return NULL; | |
321 | ||
322 | if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, | |
323 | _bfd_elf_link_hash_newfunc, | |
324 | sizeof (struct elf_link_hash_entry))) | |
325 | { | |
326 | free (htab); | |
327 | return NULL; | |
328 | } | |
329 | ||
330 | /* Init the stub hash table too. */ | |
331 | if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc, | |
332 | sizeof (struct spu_stub_hash_entry))) | |
333 | return NULL; | |
334 | ||
335 | memset (&htab->stub, 0, | |
336 | sizeof (*htab) - offsetof (struct spu_link_hash_table, stub)); | |
337 | ||
338 | return &htab->elf.root; | |
339 | } | |
340 | ||
341 | /* Free the derived linker hash table. */ | |
342 | ||
343 | static void | |
344 | spu_elf_link_hash_table_free (struct bfd_link_hash_table *hash) | |
345 | { | |
346 | struct spu_link_hash_table *ret = (struct spu_link_hash_table *) hash; | |
347 | ||
348 | bfd_hash_table_free (&ret->stub_hash_table); | |
349 | _bfd_generic_link_hash_table_free (hash); | |
350 | } | |
351 | ||
352 | /* Find the symbol for the given R_SYMNDX in IBFD and set *HP and *SYMP | |
353 | to (hash, NULL) for global symbols, and (NULL, sym) for locals. Set | |
354 | *SYMSECP to the symbol's section. *LOCSYMSP caches local syms. */ | |
355 | ||
356 | static bfd_boolean | |
357 | get_sym_h (struct elf_link_hash_entry **hp, | |
358 | Elf_Internal_Sym **symp, | |
359 | asection **symsecp, | |
360 | Elf_Internal_Sym **locsymsp, | |
361 | unsigned long r_symndx, | |
362 | bfd *ibfd) | |
363 | { | |
364 | Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; | |
365 | ||
366 | if (r_symndx >= symtab_hdr->sh_info) | |
367 | { | |
368 | struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd); | |
369 | struct elf_link_hash_entry *h; | |
370 | ||
371 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
372 | while (h->root.type == bfd_link_hash_indirect | |
373 | || h->root.type == bfd_link_hash_warning) | |
374 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
375 | ||
376 | if (hp != NULL) | |
377 | *hp = h; | |
378 | ||
379 | if (symp != NULL) | |
380 | *symp = NULL; | |
381 | ||
382 | if (symsecp != NULL) | |
383 | { | |
384 | asection *symsec = NULL; | |
385 | if (h->root.type == bfd_link_hash_defined | |
386 | || h->root.type == bfd_link_hash_defweak) | |
387 | symsec = h->root.u.def.section; | |
388 | *symsecp = symsec; | |
389 | } | |
390 | } | |
391 | else | |
392 | { | |
393 | Elf_Internal_Sym *sym; | |
394 | Elf_Internal_Sym *locsyms = *locsymsp; | |
395 | ||
396 | if (locsyms == NULL) | |
397 | { | |
398 | locsyms = (Elf_Internal_Sym *) symtab_hdr->contents; | |
399 | if (locsyms == NULL) | |
400 | locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr, | |
401 | symtab_hdr->sh_info, | |
402 | 0, NULL, NULL, NULL); | |
403 | if (locsyms == NULL) | |
404 | return FALSE; | |
405 | *locsymsp = locsyms; | |
406 | } | |
407 | sym = locsyms + r_symndx; | |
408 | ||
409 | if (hp != NULL) | |
410 | *hp = NULL; | |
411 | ||
412 | if (symp != NULL) | |
413 | *symp = sym; | |
414 | ||
415 | if (symsecp != NULL) | |
416 | { | |
417 | asection *symsec = NULL; | |
418 | if ((sym->st_shndx != SHN_UNDEF | |
419 | && sym->st_shndx < SHN_LORESERVE) | |
420 | || sym->st_shndx > SHN_HIRESERVE) | |
421 | symsec = bfd_section_from_elf_index (ibfd, sym->st_shndx); | |
422 | *symsecp = symsec; | |
423 | } | |
424 | } | |
425 | return TRUE; | |
426 | } | |
427 | ||
428 | /* Build a name for an entry in the stub hash table. The input section | |
429 | id isn't really necessary but we add that in for consistency with | |
430 | ppc32 and ppc64 stub names. We can't use a local symbol name | |
431 | because ld -r might generate duplicate local symbols. */ | |
432 | ||
433 | static char * | |
434 | spu_stub_name (const asection *input_sec, | |
435 | const asection *sym_sec, | |
436 | const struct elf_link_hash_entry *h, | |
437 | const Elf_Internal_Rela *rel) | |
438 | { | |
439 | char *stub_name; | |
440 | bfd_size_type len; | |
441 | ||
442 | if (h) | |
443 | { | |
444 | len = 8 + 1 + strlen (h->root.root.string) + 1 + 8 + 1; | |
445 | stub_name = bfd_malloc (len); | |
446 | if (stub_name == NULL) | |
447 | return stub_name; | |
448 | ||
449 | sprintf (stub_name, "%08x.%s+%x", | |
450 | input_sec->id & 0xffffffff, | |
451 | h->root.root.string, | |
452 | (int) rel->r_addend & 0xffffffff); | |
453 | len -= 8; | |
454 | } | |
455 | else | |
456 | { | |
457 | len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1; | |
458 | stub_name = bfd_malloc (len); | |
459 | if (stub_name == NULL) | |
460 | return stub_name; | |
461 | ||
462 | sprintf (stub_name, "%08x.%x:%x+%x", | |
463 | input_sec->id & 0xffffffff, | |
464 | sym_sec->id & 0xffffffff, | |
465 | (int) ELF32_R_SYM (rel->r_info) & 0xffffffff, | |
466 | (int) rel->r_addend & 0xffffffff); | |
467 | len = strlen (stub_name); | |
468 | } | |
469 | ||
470 | if (stub_name[len - 2] == '+' | |
471 | && stub_name[len - 1] == '0' | |
472 | && stub_name[len] == 0) | |
473 | stub_name[len - 2] = 0; | |
474 | ||
475 | return stub_name; | |
476 | } | |
477 | ||
478 | /* Create the note section if not already present. This is done early so | |
479 | that the linker maps the sections to the right place in the output. */ | |
480 | ||
481 | bfd_boolean | |
482 | spu_elf_create_sections (bfd *output_bfd, struct bfd_link_info *info) | |
483 | { | |
484 | bfd *ibfd; | |
485 | ||
486 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->next) | |
487 | if (bfd_get_section_by_name (ibfd, SPU_PTNOTE_SPUNAME) != NULL) | |
488 | break; | |
489 | ||
490 | if (ibfd == NULL) | |
491 | { | |
492 | /* Make SPU_PTNOTE_SPUNAME section. */ | |
493 | asection *s; | |
494 | size_t name_len; | |
495 | size_t size; | |
496 | bfd_byte *data; | |
497 | flagword flags; | |
498 | ||
499 | ibfd = info->input_bfds; | |
500 | flags = SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS | SEC_IN_MEMORY; | |
501 | s = bfd_make_section_anyway_with_flags (ibfd, SPU_PTNOTE_SPUNAME, flags); | |
502 | if (s == NULL | |
503 | || !bfd_set_section_alignment (ibfd, s, 4)) | |
504 | return FALSE; | |
505 | ||
506 | name_len = strlen (bfd_get_filename (output_bfd)) + 1; | |
507 | size = 12 + ((sizeof (SPU_PLUGIN_NAME) + 3) & -4); | |
508 | size += (name_len + 3) & -4; | |
509 | ||
510 | if (!bfd_set_section_size (ibfd, s, size)) | |
511 | return FALSE; | |
512 | ||
513 | data = bfd_zalloc (ibfd, size); | |
514 | if (data == NULL) | |
515 | return FALSE; | |
516 | ||
517 | bfd_put_32 (ibfd, sizeof (SPU_PLUGIN_NAME), data + 0); | |
518 | bfd_put_32 (ibfd, name_len, data + 4); | |
519 | bfd_put_32 (ibfd, 1, data + 8); | |
520 | memcpy (data + 12, SPU_PLUGIN_NAME, sizeof (SPU_PLUGIN_NAME)); | |
521 | memcpy (data + 12 + ((sizeof (SPU_PLUGIN_NAME) + 3) & -4), | |
522 | bfd_get_filename (output_bfd), name_len); | |
523 | s->contents = data; | |
524 | } | |
525 | ||
526 | return TRUE; | |
527 | } | |
528 | ||
529 | /* Return the section that should be marked against GC for a given | |
530 | relocation. */ | |
531 | ||
532 | static asection * | |
533 | spu_elf_gc_mark_hook (asection *sec, | |
534 | struct bfd_link_info *info ATTRIBUTE_UNUSED, | |
535 | Elf_Internal_Rela *rel ATTRIBUTE_UNUSED, | |
536 | struct elf_link_hash_entry *h, | |
537 | Elf_Internal_Sym *sym) | |
538 | { | |
539 | if (h != NULL) | |
540 | { | |
541 | switch (h->root.type) | |
542 | { | |
543 | case bfd_link_hash_defined: | |
544 | case bfd_link_hash_defweak: | |
545 | return h->root.u.def.section; | |
546 | ||
547 | case bfd_link_hash_common: | |
548 | return h->root.u.c.p->section; | |
549 | ||
550 | default: | |
551 | break; | |
552 | } | |
553 | } | |
554 | else | |
555 | return bfd_section_from_elf_index (sec->owner, sym->st_shndx); | |
556 | ||
557 | return NULL; | |
558 | } | |
559 | ||
560 | /* qsort predicate to sort sections by vma. */ | |
561 | ||
562 | static int | |
563 | sort_sections (const void *a, const void *b) | |
564 | { | |
565 | const asection *const *s1 = a; | |
566 | const asection *const *s2 = b; | |
567 | bfd_signed_vma delta = (*s1)->vma - (*s2)->vma; | |
568 | ||
569 | if (delta != 0) | |
570 | return delta < 0 ? -1 : 1; | |
571 | ||
572 | return (*s1)->index - (*s2)->index; | |
573 | } | |
574 | ||
575 | /* Identify overlays in the output bfd, and number them. */ | |
576 | ||
577 | bfd_boolean | |
578 | spu_elf_find_overlays (bfd *output_bfd, struct bfd_link_info *info) | |
579 | { | |
580 | struct spu_link_hash_table *htab = spu_hash_table (info); | |
581 | asection **alloc_sec; | |
582 | unsigned int i, n, ovl_index, num_buf; | |
583 | asection *s; | |
584 | bfd_vma ovl_end; | |
585 | ||
586 | if (output_bfd->section_count < 2) | |
587 | return FALSE; | |
588 | ||
589 | alloc_sec = bfd_malloc (output_bfd->section_count * sizeof (*alloc_sec)); | |
590 | if (alloc_sec == NULL) | |
591 | return FALSE; | |
592 | ||
593 | /* Pick out all the alloced sections. */ | |
594 | for (n = 0, s = output_bfd->sections; s != NULL; s = s->next) | |
595 | if ((s->flags & SEC_ALLOC) != 0 | |
596 | && (s->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) != SEC_THREAD_LOCAL | |
597 | && s->size != 0) | |
598 | alloc_sec[n++] = s; | |
599 | ||
600 | if (n == 0) | |
601 | { | |
602 | free (alloc_sec); | |
603 | return FALSE; | |
604 | } | |
605 | ||
606 | /* Sort them by vma. */ | |
607 | qsort (alloc_sec, n, sizeof (*alloc_sec), sort_sections); | |
608 | ||
609 | /* Look for overlapping vmas. Any with overlap must be overlays. | |
610 | Count them. Also count the number of overlay regions and for | |
611 | each region save a section from that region with the lowest vma | |
612 | and another section with the highest end vma. */ | |
613 | ovl_end = alloc_sec[0]->vma + alloc_sec[0]->size; | |
614 | for (ovl_index = 0, num_buf = 0, i = 1; i < n; i++) | |
615 | { | |
616 | s = alloc_sec[i]; | |
617 | if (s->vma < ovl_end) | |
618 | { | |
619 | asection *s0 = alloc_sec[i - 1]; | |
620 | ||
621 | if (spu_elf_section_data (s0)->ovl_index == 0) | |
622 | { | |
623 | spu_elf_section_data (s0)->ovl_index = ++ovl_index; | |
624 | alloc_sec[num_buf * 2] = s0; | |
625 | alloc_sec[num_buf * 2 + 1] = s0; | |
626 | num_buf++; | |
627 | } | |
628 | spu_elf_section_data (s)->ovl_index = ++ovl_index; | |
629 | if (ovl_end < s->vma + s->size) | |
630 | { | |
631 | ovl_end = s->vma + s->size; | |
632 | alloc_sec[num_buf * 2 - 1] = s; | |
633 | } | |
634 | } | |
635 | else | |
636 | ovl_end = s->vma + s->size; | |
637 | } | |
638 | ||
639 | htab->num_overlays = ovl_index; | |
640 | htab->num_buf = num_buf; | |
641 | if (ovl_index == 0) | |
642 | { | |
643 | free (alloc_sec); | |
644 | return FALSE; | |
645 | } | |
646 | ||
647 | alloc_sec = bfd_realloc (alloc_sec, num_buf * 2 * sizeof (*alloc_sec)); | |
648 | if (alloc_sec == NULL) | |
649 | return FALSE; | |
650 | ||
651 | htab->ovl_region = alloc_sec; | |
652 | return TRUE; | |
653 | } | |
654 | ||
655 | /* One of these per stub. */ | |
656 | #define SIZEOF_STUB1 8 | |
657 | #define ILA_79 0x4200004f /* ila $79,function_address */ | |
658 | #define BR 0x32000000 /* br stub2 */ | |
659 | ||
660 | /* One of these per overlay. */ | |
661 | #define SIZEOF_STUB2 8 | |
662 | #define ILA_78 0x4200004e /* ila $78,overlay_number */ | |
663 | /* br __ovly_load */ | |
664 | #define NOP 0x40200000 | |
665 | ||
666 | /* Return true for all relative and absolute branch and hint instructions. | |
667 | bra 00110000 0.. | |
668 | brasl 00110001 0.. | |
669 | br 00110010 0.. | |
670 | brsl 00110011 0.. | |
671 | brz 00100000 0.. | |
672 | brnz 00100001 0.. | |
673 | brhz 00100010 0.. | |
674 | brhnz 00100011 0.. | |
675 | hbra 0001000.. | |
676 | hbrr 0001001.. */ | |
677 | ||
678 | static bfd_boolean | |
679 | is_branch (const unsigned char *insn) | |
680 | { | |
681 | return (((insn[0] & 0xec) == 0x20 && (insn[1] & 0x80) == 0) | |
682 | || (insn[0] & 0xfc) == 0x10); | |
683 | } | |
684 | ||
685 | struct stubarr { | |
686 | struct spu_stub_hash_entry **sh; | |
687 | unsigned int count; | |
688 | }; | |
689 | ||
690 | /* Called via bfd_hash_traverse to set up pointers to all symbols | |
691 | in the stub hash table. */ | |
692 | ||
693 | static bfd_boolean | |
694 | populate_stubs (struct bfd_hash_entry *bh, void *inf) | |
695 | { | |
696 | struct stubarr *stubs = inf; | |
697 | ||
698 | stubs->sh[--stubs->count] = (struct spu_stub_hash_entry *) bh; | |
699 | return TRUE; | |
700 | } | |
701 | ||
702 | /* qsort predicate to sort stubs by overlay number. */ | |
703 | ||
704 | static int | |
705 | sort_stubs (const void *a, const void *b) | |
706 | { | |
707 | const struct spu_stub_hash_entry *const *sa = a; | |
708 | const struct spu_stub_hash_entry *const *sb = b; | |
709 | int i; | |
710 | bfd_signed_vma d; | |
711 | ||
712 | i = spu_elf_section_data ((*sa)->target_section->output_section)->ovl_index; | |
713 | i -= spu_elf_section_data ((*sb)->target_section->output_section)->ovl_index; | |
714 | if (i != 0) | |
715 | return i; | |
716 | ||
717 | d = ((*sa)->target_section->output_section->vma | |
718 | + (*sa)->target_section->output_offset | |
719 | + (*sa)->target_off | |
720 | - (*sb)->target_section->output_section->vma | |
721 | - (*sb)->target_section->output_offset | |
722 | - (*sb)->target_off); | |
723 | if (d != 0) | |
724 | return d < 0 ? -1 : 1; | |
725 | ||
726 | /* Two functions at the same address. Aliases perhaps. */ | |
727 | i = strcmp ((*sb)->root.string, (*sa)->root.string); | |
728 | BFD_ASSERT (i != 0); | |
729 | return i; | |
730 | } | |
731 | ||
732 | /* Allocate space for overlay call and return stubs. */ | |
733 | ||
734 | bfd_boolean | |
735 | spu_elf_size_stubs (bfd *output_bfd, | |
736 | struct bfd_link_info *info, | |
737 | int non_overlay_stubs, | |
738 | asection **stub, | |
739 | asection **ovtab, | |
740 | asection **toe) | |
741 | { | |
742 | struct spu_link_hash_table *htab = spu_hash_table (info); | |
743 | bfd *ibfd; | |
744 | struct stubarr stubs; | |
745 | unsigned i, group; | |
746 | flagword flags; | |
747 | ||
748 | htab->non_overlay_stubs = non_overlay_stubs; | |
749 | stubs.count = 0; | |
750 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) | |
751 | { | |
752 | extern const bfd_target bfd_elf32_spu_vec; | |
753 | Elf_Internal_Shdr *symtab_hdr; | |
754 | asection *section; | |
755 | Elf_Internal_Sym *local_syms = NULL; | |
756 | ||
757 | if (ibfd->xvec != &bfd_elf32_spu_vec) | |
758 | continue; | |
759 | ||
760 | /* We'll need the symbol table in a second. */ | |
761 | symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; | |
762 | if (symtab_hdr->sh_info == 0) | |
763 | continue; | |
764 | ||
765 | /* Walk over each section attached to the input bfd. */ | |
766 | for (section = ibfd->sections; section != NULL; section = section->next) | |
767 | { | |
768 | Elf_Internal_Rela *internal_relocs, *irelaend, *irela; | |
769 | ||
770 | /* If there aren't any relocs, then there's nothing more to do. */ | |
771 | if ((section->flags & SEC_RELOC) == 0 | |
772 | || (section->flags & SEC_ALLOC) == 0 | |
773 | || (section->flags & SEC_LOAD) == 0 | |
774 | || section->reloc_count == 0) | |
775 | continue; | |
776 | ||
777 | /* If this section is a link-once section that will be | |
778 | discarded, then don't create any stubs. */ | |
779 | if (section->output_section == NULL | |
780 | || section->output_section->owner != output_bfd) | |
781 | continue; | |
782 | ||
783 | /* Get the relocs. */ | |
784 | internal_relocs | |
785 | = _bfd_elf_link_read_relocs (ibfd, section, NULL, NULL, | |
786 | info->keep_memory); | |
787 | if (internal_relocs == NULL) | |
788 | goto error_ret_free_local; | |
789 | ||
790 | /* Now examine each relocation. */ | |
791 | irela = internal_relocs; | |
792 | irelaend = irela + section->reloc_count; | |
793 | for (; irela < irelaend; irela++) | |
794 | { | |
795 | enum elf_spu_reloc_type r_type; | |
796 | unsigned int r_indx; | |
797 | asection *sym_sec; | |
798 | Elf_Internal_Sym *sym; | |
799 | struct elf_link_hash_entry *h; | |
800 | char *stub_name; | |
801 | struct spu_stub_hash_entry *sh; | |
802 | unsigned int sym_type; | |
803 | enum _insn_type { non_branch, branch, call } insn_type; | |
5384511f | 804 | bfd_boolean is_setjmp; |
e9f53129 AM |
805 | |
806 | r_type = ELF32_R_TYPE (irela->r_info); | |
807 | r_indx = ELF32_R_SYM (irela->r_info); | |
808 | ||
809 | if (r_type >= R_SPU_max) | |
810 | { | |
811 | bfd_set_error (bfd_error_bad_value); | |
812 | goto error_ret_free_internal; | |
813 | } | |
814 | ||
815 | /* Determine the reloc target section. */ | |
816 | if (!get_sym_h (&h, &sym, &sym_sec, &local_syms, r_indx, ibfd)) | |
817 | goto error_ret_free_internal; | |
818 | ||
819 | if (sym_sec == NULL | |
820 | || sym_sec->output_section == NULL | |
821 | || sym_sec->output_section->owner != output_bfd) | |
822 | continue; | |
823 | ||
824 | /* Ensure no stubs for user supplied overlay manager syms. */ | |
825 | if (h != NULL | |
826 | && (strcmp (h->root.root.string, "__ovly_load") == 0 | |
827 | || strcmp (h->root.root.string, "__ovly_return") == 0)) | |
828 | continue; | |
829 | ||
830 | insn_type = non_branch; | |
831 | if (r_type == R_SPU_REL16 | |
832 | || r_type == R_SPU_ADDR16) | |
833 | { | |
834 | unsigned char insn[4]; | |
835 | ||
836 | if (!bfd_get_section_contents (ibfd, section, insn, | |
837 | irela->r_offset, 4)) | |
838 | goto error_ret_free_internal; | |
839 | ||
840 | if (is_branch (insn)) | |
841 | { | |
842 | insn_type = branch; | |
843 | if ((insn[0] & 0xfd) == 0x31) | |
844 | insn_type = call; | |
845 | } | |
846 | } | |
847 | ||
848 | /* We are only interested in function symbols. */ | |
849 | if (h != NULL) | |
850 | sym_type = h->type; | |
851 | else | |
852 | sym_type = ELF_ST_TYPE (sym->st_info); | |
853 | if (sym_type != STT_FUNC) | |
854 | { | |
855 | /* It's common for people to write assembly and forget | |
856 | to give function symbols the right type. Handle | |
857 | calls to such symbols, but warn so that (hopefully) | |
858 | people will fix their code. We need the symbol | |
859 | type to be correct to distinguish function pointer | |
860 | initialisation from other pointer initialisation. */ | |
861 | if (insn_type == call) | |
862 | { | |
863 | const char *sym_name; | |
864 | ||
865 | if (h != NULL) | |
866 | sym_name = h->root.root.string; | |
867 | else | |
868 | sym_name = bfd_elf_sym_name (sym_sec->owner, | |
869 | symtab_hdr, | |
870 | sym, | |
871 | sym_sec); | |
872 | ||
873 | (*_bfd_error_handler) (_("warning: call to non-function" | |
874 | " symbol %s defined in %B"), | |
78859468 | 875 | sym_sec->owner, sym_name); |
e9f53129 AM |
876 | } |
877 | else | |
878 | continue; | |
879 | } | |
880 | ||
5384511f AM |
881 | /* setjmp always goes via an overlay stub, because |
882 | then the return and hence the longjmp goes via | |
883 | __ovly_return. That magically makes setjmp/longjmp | |
884 | between overlays work. */ | |
885 | is_setjmp = (h != NULL | |
886 | && strncmp (h->root.root.string, "setjmp", 6) == 0 | |
887 | && (h->root.root.string[6] == '\0' | |
888 | || h->root.root.string[6] == '@')); | |
889 | ||
e9f53129 AM |
890 | /* Usually, non-overlay sections don't need stubs. */ |
891 | if (!spu_elf_section_data (sym_sec->output_section)->ovl_index | |
5384511f AM |
892 | && !non_overlay_stubs |
893 | && !is_setjmp) | |
e9f53129 AM |
894 | continue; |
895 | ||
896 | /* We need a reference from some other section before | |
897 | we consider that a symbol might need an overlay stub. */ | |
898 | if (spu_elf_section_data (sym_sec->output_section)->ovl_index | |
5384511f AM |
899 | == spu_elf_section_data (section->output_section)->ovl_index |
900 | && !is_setjmp) | |
e9f53129 AM |
901 | { |
902 | /* Or we need this to *not* be a branch. ie. We are | |
903 | possibly taking the address of a function and | |
904 | passing it out somehow. */ | |
905 | if (insn_type != non_branch) | |
906 | continue; | |
907 | } | |
908 | ||
909 | stub_name = spu_stub_name (section, sym_sec, h, irela); | |
910 | if (stub_name == NULL) | |
911 | goto error_ret_free_internal; | |
912 | ||
913 | sh = (struct spu_stub_hash_entry *) | |
914 | bfd_hash_lookup (&htab->stub_hash_table, stub_name, | |
915 | TRUE, FALSE); | |
916 | if (sh == NULL) | |
917 | { | |
918 | free (stub_name); | |
919 | error_ret_free_internal: | |
920 | if (elf_section_data (section)->relocs != internal_relocs) | |
921 | free (internal_relocs); | |
922 | error_ret_free_local: | |
923 | if (local_syms != NULL | |
924 | && (symtab_hdr->contents | |
925 | != (unsigned char *) local_syms)) | |
926 | free (local_syms); | |
927 | return FALSE; | |
928 | } | |
929 | ||
930 | /* If this entry isn't new, we already have a stub. */ | |
931 | if (sh->target_section != NULL) | |
932 | { | |
933 | free (stub_name); | |
934 | continue; | |
935 | } | |
936 | ||
937 | sh->target_section = sym_sec; | |
938 | if (h != NULL) | |
939 | sh->target_off = h->root.u.def.value; | |
940 | else | |
941 | sh->target_off = sym->st_value; | |
942 | sh->target_off += irela->r_addend; | |
943 | ||
944 | stubs.count += 1; | |
945 | } | |
946 | ||
947 | /* We're done with the internal relocs, free them. */ | |
948 | if (elf_section_data (section)->relocs != internal_relocs) | |
949 | free (internal_relocs); | |
950 | } | |
951 | ||
952 | if (local_syms != NULL | |
953 | && symtab_hdr->contents != (unsigned char *) local_syms) | |
954 | { | |
955 | if (!info->keep_memory) | |
956 | free (local_syms); | |
957 | else | |
958 | symtab_hdr->contents = (unsigned char *) local_syms; | |
959 | } | |
960 | } | |
961 | ||
962 | *stub = NULL; | |
963 | if (stubs.count == 0) | |
964 | return TRUE; | |
965 | ||
966 | ibfd = info->input_bfds; | |
967 | flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY | |
968 | | SEC_HAS_CONTENTS | SEC_IN_MEMORY); | |
969 | htab->stub = bfd_make_section_anyway_with_flags (ibfd, ".stub", flags); | |
970 | *stub = htab->stub; | |
971 | if (htab->stub == NULL | |
972 | || !bfd_set_section_alignment (ibfd, htab->stub, 2)) | |
973 | return FALSE; | |
974 | ||
975 | flags = (SEC_ALLOC | SEC_LOAD | |
976 | | SEC_HAS_CONTENTS | SEC_IN_MEMORY); | |
977 | htab->ovtab = bfd_make_section_anyway_with_flags (ibfd, ".ovtab", flags); | |
978 | *ovtab = htab->ovtab; | |
979 | if (htab->ovtab == NULL | |
980 | || !bfd_set_section_alignment (ibfd, htab->stub, 4)) | |
981 | return FALSE; | |
982 | ||
983 | *toe = bfd_make_section_anyway_with_flags (ibfd, ".toe", SEC_ALLOC); | |
984 | if (*toe == NULL | |
985 | || !bfd_set_section_alignment (ibfd, *toe, 4)) | |
986 | return FALSE; | |
987 | (*toe)->size = 16; | |
988 | ||
989 | /* Retrieve all the stubs and sort. */ | |
990 | stubs.sh = bfd_malloc (stubs.count * sizeof (*stubs.sh)); | |
991 | if (stubs.sh == NULL) | |
992 | return FALSE; | |
993 | i = stubs.count; | |
994 | bfd_hash_traverse (&htab->stub_hash_table, populate_stubs, &stubs); | |
995 | BFD_ASSERT (stubs.count == 0); | |
996 | ||
997 | stubs.count = i; | |
998 | qsort (stubs.sh, stubs.count, sizeof (*stubs.sh), sort_stubs); | |
999 | ||
1000 | /* Now that the stubs are sorted, place them in the stub section. | |
1001 | Stubs are grouped per overlay | |
1002 | . ila $79,func1 | |
1003 | . br 1f | |
1004 | . ila $79,func2 | |
1005 | . br 1f | |
1006 | . | |
1007 | . | |
1008 | . ila $79,funcn | |
1009 | . nop | |
1010 | . 1: | |
1011 | . ila $78,ovl_index | |
1012 | . br __ovly_load */ | |
1013 | ||
1014 | group = 0; | |
1015 | for (i = 0; i < stubs.count; i++) | |
1016 | { | |
1017 | if (spu_elf_section_data (stubs.sh[group]->target_section | |
1018 | ->output_section)->ovl_index | |
1019 | != spu_elf_section_data (stubs.sh[i]->target_section | |
1020 | ->output_section)->ovl_index) | |
1021 | { | |
1022 | htab->stub->size += SIZEOF_STUB2; | |
1023 | for (; group != i; group++) | |
1024 | stubs.sh[group]->delta | |
1025 | = stubs.sh[i - 1]->off - stubs.sh[group]->off; | |
1026 | } | |
1027 | if (group == i | |
1028 | || ((stubs.sh[i - 1]->target_section->output_section->vma | |
1029 | + stubs.sh[i - 1]->target_section->output_offset | |
1030 | + stubs.sh[i - 1]->target_off) | |
1031 | != (stubs.sh[i]->target_section->output_section->vma | |
1032 | + stubs.sh[i]->target_section->output_offset | |
1033 | + stubs.sh[i]->target_off))) | |
1034 | { | |
1035 | stubs.sh[i]->off = htab->stub->size; | |
1036 | htab->stub->size += SIZEOF_STUB1; | |
1037 | } | |
1038 | else | |
1039 | stubs.sh[i]->off = stubs.sh[i - 1]->off; | |
1040 | } | |
1041 | if (group != i) | |
1042 | htab->stub->size += SIZEOF_STUB2; | |
1043 | for (; group != i; group++) | |
1044 | stubs.sh[group]->delta = stubs.sh[i - 1]->off - stubs.sh[group]->off; | |
1045 | ||
1046 | /* htab->ovtab consists of two arrays. | |
1047 | . struct { | |
1048 | . u32 vma; | |
1049 | . u32 size; | |
1050 | . u32 file_off; | |
1051 | . u32 buf; | |
1052 | . } _ovly_table[]; | |
1053 | . | |
1054 | . struct { | |
1055 | . u32 mapped; | |
1056 | . } _ovly_buf_table[]; */ | |
1057 | ||
1058 | htab->ovtab->alignment_power = 4; | |
1059 | htab->ovtab->size = htab->num_overlays * 16 + htab->num_buf * 4; | |
1060 | ||
1061 | return TRUE; | |
1062 | } | |
1063 | ||
1064 | /* Functions to handle embedded spu_ovl.o object. */ | |
1065 | ||
1066 | static void * | |
1067 | ovl_mgr_open (struct bfd *nbfd ATTRIBUTE_UNUSED, void *stream) | |
1068 | { | |
1069 | return stream; | |
1070 | } | |
1071 | ||
1072 | static file_ptr | |
1073 | ovl_mgr_pread (struct bfd *abfd ATTRIBUTE_UNUSED, | |
1074 | void *stream, | |
1075 | void *buf, | |
1076 | file_ptr nbytes, | |
1077 | file_ptr offset) | |
1078 | { | |
1079 | struct _ovl_stream *os; | |
1080 | size_t count; | |
1081 | size_t max; | |
1082 | ||
1083 | os = (struct _ovl_stream *) stream; | |
7a8757b3 | 1084 | max = (const char *) os->end - (const char *) os->start; |
e9f53129 AM |
1085 | |
1086 | if ((ufile_ptr) offset >= max) | |
1087 | return 0; | |
1088 | ||
1089 | count = nbytes; | |
1090 | if (count > max - offset) | |
1091 | count = max - offset; | |
1092 | ||
7a8757b3 | 1093 | memcpy (buf, (const char *) os->start + offset, count); |
e9f53129 AM |
1094 | return count; |
1095 | } | |
1096 | ||
1097 | bfd_boolean | |
1098 | spu_elf_open_builtin_lib (bfd **ovl_bfd, const struct _ovl_stream *stream) | |
1099 | { | |
1100 | *ovl_bfd = bfd_openr_iovec ("builtin ovl_mgr", | |
1101 | "elf32-spu", | |
1102 | ovl_mgr_open, | |
1103 | (void *) stream, | |
1104 | ovl_mgr_pread, | |
f6cf9273 | 1105 | NULL, |
e9f53129 AM |
1106 | NULL); |
1107 | return *ovl_bfd != NULL; | |
1108 | } | |
1109 | ||
1110 | /* Fill in the ila and br for a stub. On the last stub for a group, | |
1111 | write the stub that sets the overlay number too. */ | |
1112 | ||
1113 | static bfd_boolean | |
1114 | write_one_stub (struct bfd_hash_entry *bh, void *inf) | |
1115 | { | |
1116 | struct spu_stub_hash_entry *ent = (struct spu_stub_hash_entry *) bh; | |
1117 | struct spu_link_hash_table *htab = inf; | |
1118 | asection *sec = htab->stub; | |
1119 | asection *s = ent->target_section; | |
1120 | unsigned int ovl; | |
1121 | bfd_vma val; | |
1122 | ||
1123 | val = ent->target_off + s->output_offset + s->output_section->vma; | |
1124 | bfd_put_32 (sec->owner, ILA_79 + ((val << 7) & 0x01ffff80), | |
1125 | sec->contents + ent->off); | |
1126 | val = ent->delta + 4; | |
1127 | bfd_put_32 (sec->owner, BR + ((val << 5) & 0x007fff80), | |
1128 | sec->contents + ent->off + 4); | |
1129 | ||
1130 | /* If this is the last stub of this group, write stub2. */ | |
1131 | if (ent->delta == 0) | |
1132 | { | |
1133 | bfd_put_32 (sec->owner, NOP, | |
1134 | sec->contents + ent->off + 4); | |
1135 | ||
1136 | ovl = spu_elf_section_data (s->output_section)->ovl_index; | |
1137 | bfd_put_32 (sec->owner, ILA_78 + ((ovl << 7) & 0x01ffff80), | |
1138 | sec->contents + ent->off + 8); | |
1139 | ||
1140 | val = (htab->ovly_load->root.u.def.section->output_section->vma | |
1141 | + htab->ovly_load->root.u.def.section->output_offset | |
1142 | + htab->ovly_load->root.u.def.value | |
1143 | - (sec->output_section->vma | |
1144 | + sec->output_offset | |
1145 | + ent->off + 12)); | |
1146 | ||
1147 | if (val + 0x20000 >= 0x40000) | |
1148 | htab->stub_overflow = TRUE; | |
1149 | ||
1150 | bfd_put_32 (sec->owner, BR + ((val << 5) & 0x007fff80), | |
1151 | sec->contents + ent->off + 12); | |
1152 | } | |
1153 | ||
1154 | if (htab->emit_stub_syms) | |
1155 | { | |
1156 | struct elf_link_hash_entry *h; | |
1157 | size_t len1, len2; | |
1158 | char *name; | |
1159 | ||
1160 | len1 = sizeof ("ovl_call.") - 1; | |
1161 | len2 = strlen (ent->root.string); | |
1162 | name = bfd_malloc (len1 + len2 + 1); | |
1163 | if (name == NULL) | |
1164 | return FALSE; | |
1165 | memcpy (name, ent->root.string, 9); | |
1166 | memcpy (name + 9, "ovl_call.", len1); | |
1167 | memcpy (name + 9 + len1, ent->root.string + 9, len2 - 9 + 1); | |
1168 | h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE); | |
1169 | if (h == NULL) | |
1170 | return FALSE; | |
1171 | if (h->root.type == bfd_link_hash_new) | |
1172 | { | |
1173 | h->root.type = bfd_link_hash_defined; | |
1174 | h->root.u.def.section = sec; | |
1175 | h->root.u.def.value = ent->off; | |
1176 | h->size = (ent->delta == 0 | |
1177 | ? SIZEOF_STUB1 + SIZEOF_STUB2 : SIZEOF_STUB1); | |
1178 | h->type = STT_FUNC; | |
1179 | h->ref_regular = 1; | |
1180 | h->def_regular = 1; | |
1181 | h->ref_regular_nonweak = 1; | |
1182 | h->forced_local = 1; | |
1183 | h->non_elf = 0; | |
1184 | } | |
1185 | } | |
1186 | ||
1187 | return TRUE; | |
1188 | } | |
1189 | ||
1190 | /* Define an STT_OBJECT symbol. */ | |
1191 | ||
1192 | static struct elf_link_hash_entry * | |
1193 | define_ovtab_symbol (struct spu_link_hash_table *htab, const char *name) | |
1194 | { | |
1195 | struct elf_link_hash_entry *h; | |
1196 | ||
1197 | h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE); | |
1198 | if (h == NULL) | |
1199 | return NULL; | |
1200 | ||
1201 | if (h->root.type != bfd_link_hash_defined | |
1202 | || !h->def_regular) | |
1203 | { | |
1204 | h->root.type = bfd_link_hash_defined; | |
1205 | h->root.u.def.section = htab->ovtab; | |
1206 | h->type = STT_OBJECT; | |
1207 | h->ref_regular = 1; | |
1208 | h->def_regular = 1; | |
1209 | h->ref_regular_nonweak = 1; | |
1210 | h->non_elf = 0; | |
1211 | } | |
1212 | else | |
1213 | { | |
1214 | (*_bfd_error_handler) (_("%B is not allowed to define %s"), | |
1215 | h->root.u.def.section->owner, | |
1216 | h->root.root.string); | |
1217 | bfd_set_error (bfd_error_bad_value); | |
1218 | return NULL; | |
1219 | } | |
1220 | ||
1221 | return h; | |
1222 | } | |
1223 | ||
1224 | /* Fill in all stubs and the overlay tables. */ | |
1225 | ||
1226 | bfd_boolean | |
1227 | spu_elf_build_stubs (struct bfd_link_info *info, int emit_syms, asection *toe) | |
1228 | { | |
1229 | struct spu_link_hash_table *htab = spu_hash_table (info); | |
1230 | struct elf_link_hash_entry *h; | |
1231 | bfd_byte *p; | |
1232 | asection *s; | |
1233 | bfd *obfd; | |
1234 | unsigned int i; | |
1235 | ||
1236 | htab->emit_stub_syms = emit_syms; | |
1237 | htab->stub->contents = bfd_zalloc (htab->stub->owner, htab->stub->size); | |
1238 | if (htab->stub->contents == NULL) | |
1239 | return FALSE; | |
1240 | ||
1241 | h = elf_link_hash_lookup (&htab->elf, "__ovly_load", FALSE, FALSE, FALSE); | |
1242 | htab->ovly_load = h; | |
1243 | BFD_ASSERT (h != NULL | |
1244 | && (h->root.type == bfd_link_hash_defined | |
1245 | || h->root.type == bfd_link_hash_defweak) | |
1246 | && h->def_regular); | |
1247 | ||
1248 | s = h->root.u.def.section->output_section; | |
1249 | if (spu_elf_section_data (s)->ovl_index) | |
1250 | { | |
1251 | (*_bfd_error_handler) (_("%s in overlay section"), | |
1252 | h->root.u.def.section->owner); | |
1253 | bfd_set_error (bfd_error_bad_value); | |
1254 | return FALSE; | |
1255 | } | |
1256 | ||
1257 | /* Write out all the stubs. */ | |
1258 | bfd_hash_traverse (&htab->stub_hash_table, write_one_stub, htab); | |
1259 | ||
1260 | if (htab->stub_overflow) | |
1261 | { | |
1262 | (*_bfd_error_handler) (_("overlay stub relocation overflow")); | |
1263 | bfd_set_error (bfd_error_bad_value); | |
1264 | return FALSE; | |
1265 | } | |
1266 | ||
1267 | htab->ovtab->contents = bfd_zalloc (htab->ovtab->owner, htab->ovtab->size); | |
1268 | if (htab->ovtab->contents == NULL) | |
1269 | return FALSE; | |
1270 | ||
1271 | /* Write out _ovly_table. */ | |
1272 | p = htab->ovtab->contents; | |
1273 | obfd = htab->ovtab->output_section->owner; | |
1274 | for (s = obfd->sections; s != NULL; s = s->next) | |
1275 | { | |
1276 | unsigned int ovl_index = spu_elf_section_data (s)->ovl_index; | |
1277 | ||
1278 | if (ovl_index != 0) | |
1279 | { | |
1280 | unsigned int lo, hi, mid; | |
1281 | unsigned long off = (ovl_index - 1) * 16; | |
1282 | bfd_put_32 (htab->ovtab->owner, s->vma, p + off); | |
1283 | bfd_put_32 (htab->ovtab->owner, (s->size + 15) & -16, p + off + 4); | |
1284 | /* file_off written later in spu_elf_modify_program_headers. */ | |
1285 | ||
1286 | lo = 0; | |
1287 | hi = htab->num_buf; | |
1288 | while (lo < hi) | |
1289 | { | |
1290 | mid = (lo + hi) >> 1; | |
1291 | if (htab->ovl_region[2 * mid + 1]->vma | |
1292 | + htab->ovl_region[2 * mid + 1]->size <= s->vma) | |
1293 | lo = mid + 1; | |
1294 | else if (htab->ovl_region[2 * mid]->vma > s->vma) | |
1295 | hi = mid; | |
1296 | else | |
1297 | { | |
1298 | bfd_put_32 (htab->ovtab->owner, mid + 1, p + off + 12); | |
1299 | break; | |
1300 | } | |
1301 | } | |
1302 | BFD_ASSERT (lo < hi); | |
1303 | } | |
1304 | } | |
1305 | ||
1306 | /* Write out _ovly_buf_table. */ | |
1307 | p = htab->ovtab->contents + htab->num_overlays * 16; | |
1308 | for (i = 0; i < htab->num_buf; i++) | |
1309 | { | |
1310 | bfd_put_32 (htab->ovtab->owner, 0, p); | |
1311 | p += 4; | |
1312 | } | |
1313 | ||
1314 | h = define_ovtab_symbol (htab, "_ovly_table"); | |
1315 | if (h == NULL) | |
1316 | return FALSE; | |
1317 | h->root.u.def.value = 0; | |
1318 | h->size = htab->num_overlays * 16; | |
1319 | ||
1320 | h = define_ovtab_symbol (htab, "_ovly_table_end"); | |
1321 | if (h == NULL) | |
1322 | return FALSE; | |
1323 | h->root.u.def.value = htab->num_overlays * 16; | |
1324 | h->size = 0; | |
1325 | ||
1326 | h = define_ovtab_symbol (htab, "_ovly_buf_table"); | |
1327 | if (h == NULL) | |
1328 | return FALSE; | |
1329 | h->root.u.def.value = htab->num_overlays * 16; | |
1330 | h->size = htab->num_buf * 4; | |
1331 | ||
1332 | h = define_ovtab_symbol (htab, "_ovly_buf_table_end"); | |
1333 | if (h == NULL) | |
1334 | return FALSE; | |
1335 | h->root.u.def.value = htab->num_overlays * 16 + htab->num_buf * 4; | |
1336 | h->size = 0; | |
1337 | ||
1338 | h = define_ovtab_symbol (htab, "_EAR_"); | |
1339 | if (h == NULL) | |
1340 | return FALSE; | |
1341 | h->root.u.def.section = toe; | |
1342 | h->root.u.def.value = 0; | |
1343 | h->size = 16; | |
1344 | ||
1345 | return TRUE; | |
1346 | } | |
1347 | ||
1348 | /* Apply RELOCS to CONTENTS of INPUT_SECTION from INPUT_BFD. */ | |
1349 | ||
1350 | static bfd_boolean | |
1351 | spu_elf_relocate_section (bfd *output_bfd, | |
1352 | struct bfd_link_info *info, | |
1353 | bfd *input_bfd, | |
1354 | asection *input_section, | |
1355 | bfd_byte *contents, | |
1356 | Elf_Internal_Rela *relocs, | |
1357 | Elf_Internal_Sym *local_syms, | |
1358 | asection **local_sections) | |
1359 | { | |
1360 | Elf_Internal_Shdr *symtab_hdr; | |
1361 | struct elf_link_hash_entry **sym_hashes; | |
1362 | Elf_Internal_Rela *rel, *relend; | |
1363 | struct spu_link_hash_table *htab; | |
1364 | bfd_boolean ret = TRUE; | |
1365 | ||
e9f53129 AM |
1366 | htab = spu_hash_table (info); |
1367 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
1368 | sym_hashes = (struct elf_link_hash_entry **) (elf_sym_hashes (input_bfd)); | |
1369 | ||
1370 | rel = relocs; | |
1371 | relend = relocs + input_section->reloc_count; | |
1372 | for (; rel < relend; rel++) | |
1373 | { | |
1374 | int r_type; | |
1375 | reloc_howto_type *howto; | |
1376 | unsigned long r_symndx; | |
1377 | Elf_Internal_Sym *sym; | |
1378 | asection *sec; | |
1379 | struct elf_link_hash_entry *h; | |
1380 | const char *sym_name; | |
1381 | bfd_vma relocation; | |
1382 | bfd_vma addend; | |
1383 | bfd_reloc_status_type r; | |
1384 | bfd_boolean unresolved_reloc; | |
1385 | bfd_boolean warned; | |
1386 | ||
1387 | r_symndx = ELF32_R_SYM (rel->r_info); | |
1388 | r_type = ELF32_R_TYPE (rel->r_info); | |
1389 | howto = elf_howto_table + r_type; | |
1390 | unresolved_reloc = FALSE; | |
1391 | warned = FALSE; | |
1392 | ||
1393 | h = NULL; | |
1394 | sym = NULL; | |
1395 | sec = NULL; | |
1396 | if (r_symndx < symtab_hdr->sh_info) | |
1397 | { | |
1398 | sym = local_syms + r_symndx; | |
1399 | sec = local_sections[r_symndx]; | |
1400 | sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec); | |
1401 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); | |
1402 | } | |
1403 | else | |
1404 | { | |
1405 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, | |
1406 | r_symndx, symtab_hdr, sym_hashes, | |
1407 | h, sec, relocation, | |
1408 | unresolved_reloc, warned); | |
1409 | sym_name = h->root.root.string; | |
1410 | } | |
1411 | ||
ab96bf03 AM |
1412 | if (sec != NULL && elf_discarded_section (sec)) |
1413 | { | |
1414 | /* For relocs against symbols from removed linkonce sections, | |
1415 | or sections discarded by a linker script, we just want the | |
1416 | section contents zeroed. Avoid any special processing. */ | |
1417 | _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset); | |
1418 | rel->r_info = 0; | |
1419 | rel->r_addend = 0; | |
1420 | continue; | |
1421 | } | |
1422 | ||
1423 | if (info->relocatable) | |
1424 | continue; | |
1425 | ||
e9f53129 AM |
1426 | if (unresolved_reloc) |
1427 | { | |
1428 | (*_bfd_error_handler) | |
1429 | (_("%B(%s+0x%lx): unresolvable %s relocation against symbol `%s'"), | |
1430 | input_bfd, | |
1431 | bfd_get_section_name (input_bfd, input_section), | |
1432 | (long) rel->r_offset, | |
1433 | howto->name, | |
1434 | sym_name); | |
1435 | ret = FALSE; | |
1436 | } | |
1437 | ||
1438 | /* If this symbol is in an overlay area, we may need to relocate | |
1439 | to the overlay stub. */ | |
1440 | addend = rel->r_addend; | |
1441 | if (sec != NULL | |
1442 | && sec->output_section != NULL | |
1443 | && sec->output_section->owner == output_bfd | |
1444 | && (spu_elf_section_data (sec->output_section)->ovl_index != 0 | |
1445 | || htab->non_overlay_stubs) | |
1446 | && !(sec == input_section | |
1447 | && is_branch (contents + rel->r_offset))) | |
1448 | { | |
1449 | char *stub_name; | |
1450 | struct spu_stub_hash_entry *sh; | |
1451 | ||
1452 | stub_name = spu_stub_name (input_section, sec, h, rel); | |
1453 | if (stub_name == NULL) | |
1454 | return FALSE; | |
1455 | ||
1456 | sh = (struct spu_stub_hash_entry *) | |
1457 | bfd_hash_lookup (&htab->stub_hash_table, stub_name, FALSE, FALSE); | |
1458 | if (sh != NULL) | |
1459 | { | |
1460 | relocation = (htab->stub->output_section->vma | |
1461 | + htab->stub->output_offset | |
1462 | + sh->off); | |
1463 | addend = 0; | |
1464 | } | |
1465 | free (stub_name); | |
1466 | } | |
1467 | ||
1468 | r = _bfd_final_link_relocate (howto, | |
1469 | input_bfd, | |
1470 | input_section, | |
1471 | contents, | |
1472 | rel->r_offset, relocation, addend); | |
1473 | ||
1474 | if (r != bfd_reloc_ok) | |
1475 | { | |
1476 | const char *msg = (const char *) 0; | |
1477 | ||
1478 | switch (r) | |
1479 | { | |
1480 | case bfd_reloc_overflow: | |
1481 | if (!((*info->callbacks->reloc_overflow) | |
1482 | (info, (h ? &h->root : NULL), sym_name, howto->name, | |
1483 | (bfd_vma) 0, input_bfd, input_section, rel->r_offset))) | |
1484 | return FALSE; | |
1485 | break; | |
1486 | ||
1487 | case bfd_reloc_undefined: | |
1488 | if (!((*info->callbacks->undefined_symbol) | |
1489 | (info, sym_name, input_bfd, input_section, | |
1490 | rel->r_offset, TRUE))) | |
1491 | return FALSE; | |
1492 | break; | |
1493 | ||
1494 | case bfd_reloc_outofrange: | |
1495 | msg = _("internal error: out of range error"); | |
1496 | goto common_error; | |
1497 | ||
1498 | case bfd_reloc_notsupported: | |
1499 | msg = _("internal error: unsupported relocation error"); | |
1500 | goto common_error; | |
1501 | ||
1502 | case bfd_reloc_dangerous: | |
1503 | msg = _("internal error: dangerous error"); | |
1504 | goto common_error; | |
1505 | ||
1506 | default: | |
1507 | msg = _("internal error: unknown error"); | |
1508 | /* fall through */ | |
1509 | ||
1510 | common_error: | |
1511 | if (!((*info->callbacks->warning) | |
1512 | (info, msg, sym_name, input_bfd, input_section, | |
1513 | rel->r_offset))) | |
1514 | return FALSE; | |
1515 | break; | |
1516 | } | |
1517 | } | |
1518 | } | |
1519 | ||
1520 | return ret; | |
1521 | } | |
1522 | ||
1523 | static int spu_plugin = 0; | |
1524 | ||
1525 | void | |
1526 | spu_elf_plugin (int val) | |
1527 | { | |
1528 | spu_plugin = val; | |
1529 | } | |
1530 | ||
1531 | /* Set ELF header e_type for plugins. */ | |
1532 | ||
1533 | static void | |
1534 | spu_elf_post_process_headers (bfd *abfd, | |
1535 | struct bfd_link_info *info ATTRIBUTE_UNUSED) | |
1536 | { | |
1537 | if (spu_plugin) | |
1538 | { | |
1539 | Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd); | |
1540 | ||
1541 | i_ehdrp->e_type = ET_DYN; | |
1542 | } | |
1543 | } | |
1544 | ||
1545 | /* We may add an extra PT_LOAD segment for .toe. We also need extra | |
1546 | segments for overlays. */ | |
1547 | ||
1548 | static int | |
1549 | spu_elf_additional_program_headers (bfd *abfd, struct bfd_link_info *info) | |
1550 | { | |
1551 | struct spu_link_hash_table *htab = spu_hash_table (info); | |
1552 | int extra = htab->num_overlays; | |
1553 | asection *sec; | |
1554 | ||
1555 | if (extra) | |
1556 | ++extra; | |
1557 | ||
1558 | sec = bfd_get_section_by_name (abfd, ".toe"); | |
1559 | if (sec != NULL && (sec->flags & SEC_LOAD) != 0) | |
1560 | ++extra; | |
1561 | ||
1562 | return extra; | |
1563 | } | |
1564 | ||
1565 | /* Remove .toe section from other PT_LOAD segments and put it in | |
1566 | a segment of its own. Put overlays in separate segments too. */ | |
1567 | ||
1568 | static bfd_boolean | |
1569 | spu_elf_modify_segment_map (bfd *abfd, struct bfd_link_info *info) | |
1570 | { | |
1571 | asection *toe, *s; | |
1572 | struct elf_segment_map *m; | |
1573 | unsigned int i; | |
1574 | ||
1575 | if (info == NULL) | |
1576 | return TRUE; | |
1577 | ||
1578 | toe = bfd_get_section_by_name (abfd, ".toe"); | |
1579 | for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next) | |
1580 | if (m->p_type == PT_LOAD && m->count > 1) | |
1581 | for (i = 0; i < m->count; i++) | |
1582 | if ((s = m->sections[i]) == toe | |
1583 | || spu_elf_section_data (s)->ovl_index != 0) | |
1584 | { | |
1585 | struct elf_segment_map *m2; | |
1586 | bfd_vma amt; | |
1587 | ||
1588 | if (i + 1 < m->count) | |
1589 | { | |
1590 | amt = sizeof (struct elf_segment_map); | |
1591 | amt += (m->count - (i + 2)) * sizeof (m->sections[0]); | |
1592 | m2 = bfd_zalloc (abfd, amt); | |
1593 | if (m2 == NULL) | |
1594 | return FALSE; | |
1595 | m2->count = m->count - (i + 1); | |
1596 | memcpy (m2->sections, m->sections + i + 1, | |
1597 | m2->count * sizeof (m->sections[0])); | |
1598 | m2->p_type = PT_LOAD; | |
1599 | m2->next = m->next; | |
1600 | m->next = m2; | |
1601 | } | |
1602 | m->count = 1; | |
1603 | if (i != 0) | |
1604 | { | |
1605 | m->count = i; | |
1606 | amt = sizeof (struct elf_segment_map); | |
1607 | m2 = bfd_zalloc (abfd, amt); | |
1608 | if (m2 == NULL) | |
1609 | return FALSE; | |
1610 | m2->p_type = PT_LOAD; | |
1611 | m2->count = 1; | |
1612 | m2->sections[0] = s; | |
1613 | m2->next = m->next; | |
1614 | m->next = m2; | |
1615 | } | |
1616 | break; | |
1617 | } | |
1618 | ||
1619 | return TRUE; | |
1620 | } | |
1621 | ||
1622 | /* Check that all loadable section VMAs lie in the range | |
1623 | LO .. HI inclusive. */ | |
1624 | ||
1625 | asection * | |
1626 | spu_elf_check_vma (bfd *abfd, bfd_vma lo, bfd_vma hi) | |
1627 | { | |
1628 | struct elf_segment_map *m; | |
1629 | unsigned int i; | |
1630 | ||
1631 | for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next) | |
1632 | if (m->p_type == PT_LOAD) | |
1633 | for (i = 0; i < m->count; i++) | |
1634 | if (m->sections[i]->size != 0 | |
1635 | && (m->sections[i]->vma < lo | |
1636 | || m->sections[i]->vma > hi | |
1637 | || m->sections[i]->vma + m->sections[i]->size - 1 > hi)) | |
1638 | return m->sections[i]; | |
1639 | ||
1640 | return NULL; | |
1641 | } | |
1642 | ||
1643 | /* Tweak phdrs before writing them out. */ | |
1644 | ||
1645 | static int | |
1646 | spu_elf_modify_program_headers (bfd *abfd, struct bfd_link_info *info) | |
1647 | { | |
1648 | const struct elf_backend_data *bed; | |
1649 | struct elf_obj_tdata *tdata; | |
1650 | Elf_Internal_Phdr *phdr, *last; | |
1651 | struct spu_link_hash_table *htab; | |
1652 | unsigned int count; | |
1653 | unsigned int i; | |
1654 | ||
1655 | if (info == NULL) | |
1656 | return TRUE; | |
1657 | ||
1658 | bed = get_elf_backend_data (abfd); | |
1659 | tdata = elf_tdata (abfd); | |
1660 | phdr = tdata->phdr; | |
1661 | count = tdata->program_header_size / bed->s->sizeof_phdr; | |
1662 | htab = spu_hash_table (info); | |
1663 | if (htab->num_overlays != 0) | |
1664 | { | |
1665 | struct elf_segment_map *m; | |
1666 | unsigned int o; | |
1667 | ||
1668 | for (i = 0, m = elf_tdata (abfd)->segment_map; m; ++i, m = m->next) | |
1669 | if (m->count != 0 | |
1670 | && (o = spu_elf_section_data (m->sections[0])->ovl_index) != 0) | |
1671 | { | |
1672 | /* Mark this as an overlay header. */ | |
1673 | phdr[i].p_flags |= PF_OVERLAY; | |
1674 | ||
1675 | if (htab->ovtab != NULL && htab->ovtab->size != 0) | |
1676 | { | |
1677 | bfd_byte *p = htab->ovtab->contents; | |
1678 | unsigned int off = (o - 1) * 16 + 8; | |
1679 | ||
1680 | /* Write file_off into _ovly_table. */ | |
1681 | bfd_put_32 (htab->ovtab->owner, phdr[i].p_offset, p + off); | |
1682 | } | |
1683 | } | |
1684 | } | |
1685 | ||
1686 | /* Round up p_filesz and p_memsz of PT_LOAD segments to multiples | |
1687 | of 16. This should always be possible when using the standard | |
1688 | linker scripts, but don't create overlapping segments if | |
1689 | someone is playing games with linker scripts. */ | |
1690 | last = NULL; | |
1691 | for (i = count; i-- != 0; ) | |
1692 | if (phdr[i].p_type == PT_LOAD) | |
1693 | { | |
1694 | unsigned adjust; | |
1695 | ||
1696 | adjust = -phdr[i].p_filesz & 15; | |
1697 | if (adjust != 0 | |
1698 | && last != NULL | |
1699 | && phdr[i].p_offset + phdr[i].p_filesz > last->p_offset - adjust) | |
1700 | break; | |
1701 | ||
1702 | adjust = -phdr[i].p_memsz & 15; | |
1703 | if (adjust != 0 | |
1704 | && last != NULL | |
1705 | && phdr[i].p_filesz != 0 | |
1706 | && phdr[i].p_vaddr + phdr[i].p_memsz > last->p_vaddr - adjust | |
1707 | && phdr[i].p_vaddr + phdr[i].p_memsz <= last->p_vaddr) | |
1708 | break; | |
1709 | ||
1710 | if (phdr[i].p_filesz != 0) | |
1711 | last = &phdr[i]; | |
1712 | } | |
1713 | ||
1714 | if (i == (unsigned int) -1) | |
1715 | for (i = count; i-- != 0; ) | |
1716 | if (phdr[i].p_type == PT_LOAD) | |
1717 | { | |
1718 | unsigned adjust; | |
1719 | ||
1720 | adjust = -phdr[i].p_filesz & 15; | |
1721 | phdr[i].p_filesz += adjust; | |
1722 | ||
1723 | adjust = -phdr[i].p_memsz & 15; | |
1724 | phdr[i].p_memsz += adjust; | |
1725 | } | |
1726 | ||
1727 | return TRUE; | |
1728 | } | |
1729 | ||
1730 | /* Arrange for our linker created section to be output. */ | |
1731 | ||
1732 | static bfd_boolean | |
1733 | spu_elf_section_processing (bfd *abfd ATTRIBUTE_UNUSED, | |
1734 | Elf_Internal_Shdr *i_shdrp) | |
1735 | { | |
1736 | asection *sec; | |
1737 | ||
1738 | sec = i_shdrp->bfd_section; | |
1739 | if (sec != NULL | |
1740 | && (sec->flags & SEC_LINKER_CREATED) != 0 | |
1741 | && sec->name != NULL | |
1742 | && strcmp (sec->name, SPU_PTNOTE_SPUNAME) == 0) | |
1743 | i_shdrp->contents = sec->contents; | |
1744 | ||
1745 | return TRUE; | |
1746 | } | |
1747 | ||
1748 | #define TARGET_BIG_SYM bfd_elf32_spu_vec | |
1749 | #define TARGET_BIG_NAME "elf32-spu" | |
1750 | #define ELF_ARCH bfd_arch_spu | |
1751 | #define ELF_MACHINE_CODE EM_SPU | |
1752 | /* This matches the alignment need for DMA. */ | |
1753 | #define ELF_MAXPAGESIZE 0x80 | |
1754 | #define elf_backend_rela_normal 1 | |
1755 | #define elf_backend_can_gc_sections 1 | |
1756 | ||
1757 | #define bfd_elf32_bfd_reloc_type_lookup spu_elf_reloc_type_lookup | |
1758 | #define elf_info_to_howto spu_elf_info_to_howto | |
1759 | #define elf_backend_gc_mark_hook spu_elf_gc_mark_hook | |
1760 | #define elf_backend_relocate_section spu_elf_relocate_section | |
1761 | #define elf_backend_symbol_processing spu_elf_backend_symbol_processing | |
1762 | #define bfd_elf32_new_section_hook spu_elf_new_section_hook | |
1763 | #define bfd_elf32_bfd_link_hash_table_create spu_elf_link_hash_table_create | |
1764 | #define bfd_elf32_bfd_link_hash_table_free spu_elf_link_hash_table_free | |
1765 | ||
1766 | #define elf_backend_additional_program_headers spu_elf_additional_program_headers | |
1767 | #define elf_backend_modify_segment_map spu_elf_modify_segment_map | |
1768 | #define elf_backend_modify_program_headers spu_elf_modify_program_headers | |
1769 | #define elf_backend_post_process_headers spu_elf_post_process_headers | |
1770 | #define elf_backend_section_processing spu_elf_section_processing | |
1771 | #define elf_backend_special_sections spu_elf_special_sections | |
1772 | ||
1773 | #include "elf32-target.h" |