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32090b8e | 1 | /* ELF executable support for BFD. |
6014cea7 | 2 | Copyright 1993, 1994, 1995, 1996 Free Software Foundation, Inc. |
32090b8e KR |
3 | |
4 | This file is part of BFD, the Binary File Descriptor library. | |
5 | ||
6 | This program is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 2 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | This program is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with this program; if not, write to the Free Software | |
6f904fce | 18 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
32090b8e | 19 | |
d1b44e83 ILT |
20 | /* |
21 | ||
22 | SECTION | |
23 | ELF backends | |
24 | ||
25 | BFD support for ELF formats is being worked on. | |
26 | Currently, the best supported back ends are for sparc and i386 | |
27 | (running svr4 or Solaris 2). | |
28 | ||
29 | Documentation of the internals of the support code still needs | |
30 | to be written. The code is changing quickly enough that we | |
31 | haven't bothered yet. | |
32 | */ | |
33 | ||
32090b8e KR |
34 | #include "bfd.h" |
35 | #include "sysdep.h" | |
013dec1a | 36 | #include "bfdlink.h" |
32090b8e KR |
37 | #include "libbfd.h" |
38 | #define ARCH_SIZE 0 | |
6ab826bd | 39 | #include "elf-bfd.h" |
32090b8e | 40 | |
fd0198f0 | 41 | static INLINE struct elf_segment_map *make_mapping |
edf3fe48 | 42 | PARAMS ((bfd *, asection **, unsigned int, unsigned int, boolean)); |
191d910c | 43 | static boolean map_sections_to_segments PARAMS ((bfd *)); |
fd0198f0 ILT |
44 | static int elf_sort_sections PARAMS ((const PTR, const PTR)); |
45 | static boolean assign_file_positions_for_segments PARAMS ((bfd *)); | |
46 | static boolean assign_file_positions_except_relocs PARAMS ((bfd *)); | |
ede4eed4 KR |
47 | static boolean prep_headers PARAMS ((bfd *)); |
48 | static boolean swap_out_syms PARAMS ((bfd *, struct bfd_strtab_hash **)); | |
3dbf33ee | 49 | static boolean copy_private_bfd_data PARAMS ((bfd *, bfd *)); |
ea3f0585 FF |
50 | static char *elf_read PARAMS ((bfd *, long, unsigned int)); |
51 | static void elf_fake_sections PARAMS ((bfd *, asection *, PTR)); | |
52 | static boolean assign_section_numbers PARAMS ((bfd *)); | |
53 | static INLINE int sym_is_global PARAMS ((bfd *, asymbol *)); | |
54 | static boolean elf_map_symbols PARAMS ((bfd *)); | |
55 | static bfd_size_type get_program_header_size PARAMS ((bfd *)); | |
ede4eed4 | 56 | |
32090b8e KR |
57 | /* Standard ELF hash function. Do not change this function; you will |
58 | cause invalid hash tables to be generated. (Well, you would if this | |
59 | were being used yet.) */ | |
60 | unsigned long | |
013dec1a ILT |
61 | bfd_elf_hash (name) |
62 | CONST unsigned char *name; | |
32090b8e KR |
63 | { |
64 | unsigned long h = 0; | |
65 | unsigned long g; | |
66 | int ch; | |
67 | ||
68 | while ((ch = *name++) != '\0') | |
69 | { | |
70 | h = (h << 4) + ch; | |
71 | if ((g = (h & 0xf0000000)) != 0) | |
72 | { | |
73 | h ^= g >> 24; | |
74 | h &= ~g; | |
75 | } | |
76 | } | |
77 | return h; | |
78 | } | |
79 | ||
80 | /* Read a specified number of bytes at a specified offset in an ELF | |
81 | file, into a newly allocated buffer, and return a pointer to the | |
82 | buffer. */ | |
83 | ||
84 | static char * | |
013dec1a ILT |
85 | elf_read (abfd, offset, size) |
86 | bfd * abfd; | |
87 | long offset; | |
ae115e51 | 88 | unsigned int size; |
32090b8e KR |
89 | { |
90 | char *buf; | |
91 | ||
92 | if ((buf = bfd_alloc (abfd, size)) == NULL) | |
a9713b91 | 93 | return NULL; |
32090b8e | 94 | if (bfd_seek (abfd, offset, SEEK_SET) == -1) |
013dec1a | 95 | return NULL; |
32090b8e KR |
96 | if (bfd_read ((PTR) buf, size, 1, abfd) != size) |
97 | { | |
013dec1a ILT |
98 | if (bfd_get_error () != bfd_error_system_call) |
99 | bfd_set_error (bfd_error_file_truncated); | |
32090b8e KR |
100 | return NULL; |
101 | } | |
102 | return buf; | |
103 | } | |
104 | ||
105 | boolean | |
013dec1a ILT |
106 | elf_mkobject (abfd) |
107 | bfd * abfd; | |
32090b8e KR |
108 | { |
109 | /* this just does initialization */ | |
110 | /* coff_mkobject zalloc's space for tdata.coff_obj_data ... */ | |
111 | elf_tdata (abfd) = (struct elf_obj_tdata *) | |
112 | bfd_zalloc (abfd, sizeof (struct elf_obj_tdata)); | |
113 | if (elf_tdata (abfd) == 0) | |
a9713b91 | 114 | return false; |
32090b8e KR |
115 | /* since everything is done at close time, do we need any |
116 | initialization? */ | |
117 | ||
118 | return true; | |
119 | } | |
120 | ||
121 | char * | |
ede4eed4 | 122 | bfd_elf_get_str_section (abfd, shindex) |
013dec1a ILT |
123 | bfd * abfd; |
124 | unsigned int shindex; | |
32090b8e KR |
125 | { |
126 | Elf_Internal_Shdr **i_shdrp; | |
127 | char *shstrtab = NULL; | |
128 | unsigned int offset; | |
129 | unsigned int shstrtabsize; | |
130 | ||
131 | i_shdrp = elf_elfsections (abfd); | |
132 | if (i_shdrp == 0 || i_shdrp[shindex] == 0) | |
133 | return 0; | |
134 | ||
b176e1e9 | 135 | shstrtab = (char *) i_shdrp[shindex]->contents; |
32090b8e KR |
136 | if (shstrtab == NULL) |
137 | { | |
138 | /* No cached one, attempt to read, and cache what we read. */ | |
139 | offset = i_shdrp[shindex]->sh_offset; | |
140 | shstrtabsize = i_shdrp[shindex]->sh_size; | |
141 | shstrtab = elf_read (abfd, offset, shstrtabsize); | |
b176e1e9 | 142 | i_shdrp[shindex]->contents = (PTR) shstrtab; |
32090b8e KR |
143 | } |
144 | return shstrtab; | |
145 | } | |
146 | ||
147 | char * | |
ede4eed4 | 148 | bfd_elf_string_from_elf_section (abfd, shindex, strindex) |
013dec1a ILT |
149 | bfd * abfd; |
150 | unsigned int shindex; | |
151 | unsigned int strindex; | |
32090b8e KR |
152 | { |
153 | Elf_Internal_Shdr *hdr; | |
154 | ||
155 | if (strindex == 0) | |
156 | return ""; | |
157 | ||
158 | hdr = elf_elfsections (abfd)[shindex]; | |
159 | ||
b176e1e9 | 160 | if (hdr->contents == NULL |
ede4eed4 | 161 | && bfd_elf_get_str_section (abfd, shindex) == NULL) |
32090b8e KR |
162 | return NULL; |
163 | ||
b176e1e9 | 164 | return ((char *) hdr->contents) + strindex; |
32090b8e KR |
165 | } |
166 | ||
497c5434 | 167 | /* Make a BFD section from an ELF section. We store a pointer to the |
b176e1e9 | 168 | BFD section in the bfd_section field of the header. */ |
497c5434 ILT |
169 | |
170 | boolean | |
171 | _bfd_elf_make_section_from_shdr (abfd, hdr, name) | |
172 | bfd *abfd; | |
173 | Elf_Internal_Shdr *hdr; | |
174 | const char *name; | |
175 | { | |
176 | asection *newsect; | |
177 | flagword flags; | |
178 | ||
b176e1e9 | 179 | if (hdr->bfd_section != NULL) |
497c5434 | 180 | { |
b176e1e9 ILT |
181 | BFD_ASSERT (strcmp (name, |
182 | bfd_get_section_name (abfd, hdr->bfd_section)) == 0); | |
497c5434 ILT |
183 | return true; |
184 | } | |
185 | ||
186 | newsect = bfd_make_section_anyway (abfd, name); | |
187 | if (newsect == NULL) | |
188 | return false; | |
189 | ||
190 | newsect->filepos = hdr->sh_offset; | |
191 | ||
192 | if (! bfd_set_section_vma (abfd, newsect, hdr->sh_addr) | |
193 | || ! bfd_set_section_size (abfd, newsect, hdr->sh_size) | |
194 | || ! bfd_set_section_alignment (abfd, newsect, | |
195 | bfd_log2 (hdr->sh_addralign))) | |
196 | return false; | |
197 | ||
198 | flags = SEC_NO_FLAGS; | |
199 | if (hdr->sh_type != SHT_NOBITS) | |
200 | flags |= SEC_HAS_CONTENTS; | |
201 | if ((hdr->sh_flags & SHF_ALLOC) != 0) | |
202 | { | |
203 | flags |= SEC_ALLOC; | |
204 | if (hdr->sh_type != SHT_NOBITS) | |
205 | flags |= SEC_LOAD; | |
206 | } | |
207 | if ((hdr->sh_flags & SHF_WRITE) == 0) | |
208 | flags |= SEC_READONLY; | |
209 | if ((hdr->sh_flags & SHF_EXECINSTR) != 0) | |
210 | flags |= SEC_CODE; | |
7c6da9ca | 211 | else if ((flags & SEC_LOAD) != 0) |
497c5434 ILT |
212 | flags |= SEC_DATA; |
213 | ||
214 | /* The debugging sections appear to be recognized only by name, not | |
215 | any sort of flag. */ | |
216 | if (strncmp (name, ".debug", sizeof ".debug" - 1) == 0 | |
217 | || strncmp (name, ".line", sizeof ".line" - 1) == 0 | |
218 | || strncmp (name, ".stab", sizeof ".stab" - 1) == 0) | |
219 | flags |= SEC_DEBUGGING; | |
220 | ||
f0c12b73 DE |
221 | /* As a GNU extension, if the name begins with .gnu.linkonce, we |
222 | only link a single copy of the section. This is used to support | |
223 | g++. g++ will emit each template expansion in its own section. | |
224 | The symbols will be defined as weak, so that multiple definitions | |
225 | are permitted. The GNU linker extension is to actually discard | |
226 | all but one of the sections. */ | |
227 | if (strncmp (name, ".gnu.linkonce", sizeof ".gnu.linkonce" - 1) == 0) | |
228 | flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD; | |
229 | ||
497c5434 ILT |
230 | if (! bfd_set_section_flags (abfd, newsect, flags)) |
231 | return false; | |
232 | ||
fd0198f0 ILT |
233 | if ((flags & SEC_ALLOC) != 0) |
234 | { | |
235 | Elf_Internal_Phdr *phdr; | |
236 | unsigned int i; | |
237 | ||
238 | /* Look through the phdrs to see if we need to adjust the lma. */ | |
239 | phdr = elf_tdata (abfd)->phdr; | |
240 | for (i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++) | |
241 | { | |
242 | if (phdr->p_type == PT_LOAD | |
6933148a | 243 | && phdr->p_paddr != 0 |
fd0198f0 ILT |
244 | && phdr->p_vaddr != phdr->p_paddr |
245 | && phdr->p_vaddr <= hdr->sh_addr | |
b944e7e8 ILT |
246 | && phdr->p_vaddr + phdr->p_memsz >= hdr->sh_addr + hdr->sh_size |
247 | && ((flags & SEC_LOAD) == 0 | |
248 | || (phdr->p_offset <= hdr->sh_offset | |
249 | && (phdr->p_offset + phdr->p_filesz | |
250 | >= hdr->sh_offset + hdr->sh_size)))) | |
fd0198f0 ILT |
251 | { |
252 | newsect->lma += phdr->p_paddr - phdr->p_vaddr; | |
253 | break; | |
254 | } | |
255 | } | |
256 | } | |
257 | ||
b176e1e9 | 258 | hdr->bfd_section = newsect; |
497c5434 ILT |
259 | elf_section_data (newsect)->this_hdr = *hdr; |
260 | ||
261 | return true; | |
262 | } | |
263 | ||
32090b8e KR |
264 | /* |
265 | INTERNAL_FUNCTION | |
266 | bfd_elf_find_section | |
267 | ||
268 | SYNOPSIS | |
269 | struct elf_internal_shdr *bfd_elf_find_section (bfd *abfd, char *name); | |
270 | ||
271 | DESCRIPTION | |
272 | Helper functions for GDB to locate the string tables. | |
273 | Since BFD hides string tables from callers, GDB needs to use an | |
274 | internal hook to find them. Sun's .stabstr, in particular, | |
275 | isn't even pointed to by the .stab section, so ordinary | |
276 | mechanisms wouldn't work to find it, even if we had some. | |
277 | */ | |
278 | ||
279 | struct elf_internal_shdr * | |
013dec1a ILT |
280 | bfd_elf_find_section (abfd, name) |
281 | bfd * abfd; | |
282 | char *name; | |
32090b8e KR |
283 | { |
284 | Elf_Internal_Shdr **i_shdrp; | |
285 | char *shstrtab; | |
286 | unsigned int max; | |
287 | unsigned int i; | |
288 | ||
289 | i_shdrp = elf_elfsections (abfd); | |
290 | if (i_shdrp != NULL) | |
291 | { | |
ede4eed4 | 292 | shstrtab = bfd_elf_get_str_section (abfd, elf_elfheader (abfd)->e_shstrndx); |
32090b8e KR |
293 | if (shstrtab != NULL) |
294 | { | |
295 | max = elf_elfheader (abfd)->e_shnum; | |
296 | for (i = 1; i < max; i++) | |
297 | if (!strcmp (&shstrtab[i_shdrp[i]->sh_name], name)) | |
298 | return i_shdrp[i]; | |
299 | } | |
300 | } | |
301 | return 0; | |
302 | } | |
303 | ||
32090b8e KR |
304 | const char *const bfd_elf_section_type_names[] = { |
305 | "SHT_NULL", "SHT_PROGBITS", "SHT_SYMTAB", "SHT_STRTAB", | |
306 | "SHT_RELA", "SHT_HASH", "SHT_DYNAMIC", "SHT_NOTE", | |
307 | "SHT_NOBITS", "SHT_REL", "SHT_SHLIB", "SHT_DYNSYM", | |
308 | }; | |
309 | ||
310 | /* ELF relocs are against symbols. If we are producing relocateable | |
311 | output, and the reloc is against an external symbol, and nothing | |
312 | has given us any additional addend, the resulting reloc will also | |
313 | be against the same symbol. In such a case, we don't want to | |
314 | change anything about the way the reloc is handled, since it will | |
315 | all be done at final link time. Rather than put special case code | |
316 | into bfd_perform_relocation, all the reloc types use this howto | |
317 | function. It just short circuits the reloc if producing | |
318 | relocateable output against an external symbol. */ | |
319 | ||
013dec1a | 320 | /*ARGSUSED*/ |
32090b8e KR |
321 | bfd_reloc_status_type |
322 | bfd_elf_generic_reloc (abfd, | |
323 | reloc_entry, | |
324 | symbol, | |
325 | data, | |
326 | input_section, | |
4c3721d5 ILT |
327 | output_bfd, |
328 | error_message) | |
32090b8e KR |
329 | bfd *abfd; |
330 | arelent *reloc_entry; | |
331 | asymbol *symbol; | |
332 | PTR data; | |
333 | asection *input_section; | |
334 | bfd *output_bfd; | |
4c3721d5 | 335 | char **error_message; |
32090b8e KR |
336 | { |
337 | if (output_bfd != (bfd *) NULL | |
338 | && (symbol->flags & BSF_SECTION_SYM) == 0 | |
d1b44e83 ILT |
339 | && (! reloc_entry->howto->partial_inplace |
340 | || reloc_entry->addend == 0)) | |
32090b8e KR |
341 | { |
342 | reloc_entry->address += input_section->output_offset; | |
343 | return bfd_reloc_ok; | |
344 | } | |
345 | ||
346 | return bfd_reloc_continue; | |
347 | } | |
013dec1a | 348 | \f |
27fb8f29 ILT |
349 | /* Print out the program headers. */ |
350 | ||
351 | boolean | |
352 | _bfd_elf_print_private_bfd_data (abfd, farg) | |
353 | bfd *abfd; | |
354 | PTR farg; | |
355 | { | |
356 | FILE *f = (FILE *) farg; | |
357 | Elf_Internal_Phdr *p; | |
02fcd126 ILT |
358 | asection *s; |
359 | bfd_byte *dynbuf = NULL; | |
27fb8f29 ILT |
360 | |
361 | p = elf_tdata (abfd)->phdr; | |
02fcd126 | 362 | if (p != NULL) |
27fb8f29 | 363 | { |
02fcd126 | 364 | unsigned int i, c; |
27fb8f29 | 365 | |
02fcd126 ILT |
366 | fprintf (f, "\nProgram Header:\n"); |
367 | c = elf_elfheader (abfd)->e_phnum; | |
368 | for (i = 0; i < c; i++, p++) | |
27fb8f29 | 369 | { |
02fcd126 ILT |
370 | const char *s; |
371 | char buf[20]; | |
372 | ||
373 | switch (p->p_type) | |
374 | { | |
375 | case PT_NULL: s = "NULL"; break; | |
376 | case PT_LOAD: s = "LOAD"; break; | |
377 | case PT_DYNAMIC: s = "DYNAMIC"; break; | |
378 | case PT_INTERP: s = "INTERP"; break; | |
379 | case PT_NOTE: s = "NOTE"; break; | |
380 | case PT_SHLIB: s = "SHLIB"; break; | |
381 | case PT_PHDR: s = "PHDR"; break; | |
382 | default: sprintf (buf, "0x%lx", p->p_type); s = buf; break; | |
383 | } | |
384 | fprintf (f, "%8s off 0x", s); | |
385 | fprintf_vma (f, p->p_offset); | |
386 | fprintf (f, " vaddr 0x"); | |
387 | fprintf_vma (f, p->p_vaddr); | |
388 | fprintf (f, " paddr 0x"); | |
389 | fprintf_vma (f, p->p_paddr); | |
390 | fprintf (f, " align 2**%u\n", bfd_log2 (p->p_align)); | |
391 | fprintf (f, " filesz 0x"); | |
392 | fprintf_vma (f, p->p_filesz); | |
393 | fprintf (f, " memsz 0x"); | |
394 | fprintf_vma (f, p->p_memsz); | |
395 | fprintf (f, " flags %c%c%c", | |
396 | (p->p_flags & PF_R) != 0 ? 'r' : '-', | |
397 | (p->p_flags & PF_W) != 0 ? 'w' : '-', | |
398 | (p->p_flags & PF_X) != 0 ? 'x' : '-'); | |
399 | if ((p->p_flags &~ (PF_R | PF_W | PF_X)) != 0) | |
400 | fprintf (f, " %lx", p->p_flags &~ (PF_R | PF_W | PF_X)); | |
401 | fprintf (f, "\n"); | |
402 | } | |
403 | } | |
404 | ||
405 | s = bfd_get_section_by_name (abfd, ".dynamic"); | |
406 | if (s != NULL) | |
407 | { | |
408 | int elfsec; | |
409 | unsigned long link; | |
410 | bfd_byte *extdyn, *extdynend; | |
411 | size_t extdynsize; | |
412 | void (*swap_dyn_in) PARAMS ((bfd *, const PTR, Elf_Internal_Dyn *)); | |
413 | ||
414 | fprintf (f, "\nDynamic Section:\n"); | |
415 | ||
416 | dynbuf = (bfd_byte *) bfd_malloc (s->_raw_size); | |
417 | if (dynbuf == NULL) | |
418 | goto error_return; | |
419 | if (! bfd_get_section_contents (abfd, s, (PTR) dynbuf, (file_ptr) 0, | |
420 | s->_raw_size)) | |
421 | goto error_return; | |
422 | ||
423 | elfsec = _bfd_elf_section_from_bfd_section (abfd, s); | |
424 | if (elfsec == -1) | |
425 | goto error_return; | |
426 | link = elf_elfsections (abfd)[elfsec]->sh_link; | |
427 | ||
428 | extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn; | |
429 | swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in; | |
430 | ||
431 | extdyn = dynbuf; | |
432 | extdynend = extdyn + s->_raw_size; | |
433 | for (; extdyn < extdynend; extdyn += extdynsize) | |
434 | { | |
435 | Elf_Internal_Dyn dyn; | |
436 | const char *name; | |
437 | char ab[20]; | |
438 | boolean stringp; | |
439 | ||
440 | (*swap_dyn_in) (abfd, (PTR) extdyn, &dyn); | |
441 | ||
442 | if (dyn.d_tag == DT_NULL) | |
443 | break; | |
444 | ||
445 | stringp = false; | |
446 | switch (dyn.d_tag) | |
447 | { | |
448 | default: | |
927d05b5 | 449 | sprintf (ab, "0x%lx", (unsigned long) dyn.d_tag); |
02fcd126 ILT |
450 | name = ab; |
451 | break; | |
452 | ||
453 | case DT_NEEDED: name = "NEEDED"; stringp = true; break; | |
454 | case DT_PLTRELSZ: name = "PLTRELSZ"; break; | |
455 | case DT_PLTGOT: name = "PLTGOT"; break; | |
456 | case DT_HASH: name = "HASH"; break; | |
457 | case DT_STRTAB: name = "STRTAB"; break; | |
458 | case DT_SYMTAB: name = "SYMTAB"; break; | |
459 | case DT_RELA: name = "RELA"; break; | |
460 | case DT_RELASZ: name = "RELASZ"; break; | |
461 | case DT_RELAENT: name = "RELAENT"; break; | |
462 | case DT_STRSZ: name = "STRSZ"; break; | |
463 | case DT_SYMENT: name = "SYMENT"; break; | |
464 | case DT_INIT: name = "INIT"; break; | |
465 | case DT_FINI: name = "FINI"; break; | |
466 | case DT_SONAME: name = "SONAME"; stringp = true; break; | |
467 | case DT_RPATH: name = "RPATH"; stringp = true; break; | |
468 | case DT_SYMBOLIC: name = "SYMBOLIC"; break; | |
469 | case DT_REL: name = "REL"; break; | |
470 | case DT_RELSZ: name = "RELSZ"; break; | |
471 | case DT_RELENT: name = "RELENT"; break; | |
472 | case DT_PLTREL: name = "PLTREL"; break; | |
473 | case DT_DEBUG: name = "DEBUG"; break; | |
474 | case DT_TEXTREL: name = "TEXTREL"; break; | |
475 | case DT_JMPREL: name = "JMPREL"; break; | |
476 | } | |
477 | ||
478 | fprintf (f, " %-11s ", name); | |
479 | if (! stringp) | |
927d05b5 | 480 | fprintf (f, "0x%lx", (unsigned long) dyn.d_un.d_val); |
02fcd126 ILT |
481 | else |
482 | { | |
483 | const char *string; | |
484 | ||
485 | string = bfd_elf_string_from_elf_section (abfd, link, | |
486 | dyn.d_un.d_val); | |
487 | if (string == NULL) | |
488 | goto error_return; | |
489 | fprintf (f, "%s", string); | |
490 | } | |
491 | fprintf (f, "\n"); | |
27fb8f29 | 492 | } |
02fcd126 ILT |
493 | |
494 | free (dynbuf); | |
495 | dynbuf = NULL; | |
27fb8f29 ILT |
496 | } |
497 | ||
498 | return true; | |
02fcd126 ILT |
499 | |
500 | error_return: | |
501 | if (dynbuf != NULL) | |
502 | free (dynbuf); | |
503 | return false; | |
27fb8f29 ILT |
504 | } |
505 | ||
b176e1e9 ILT |
506 | /* Display ELF-specific fields of a symbol. */ |
507 | void | |
508 | bfd_elf_print_symbol (ignore_abfd, filep, symbol, how) | |
509 | bfd *ignore_abfd; | |
510 | PTR filep; | |
511 | asymbol *symbol; | |
512 | bfd_print_symbol_type how; | |
513 | { | |
514 | FILE *file = (FILE *) filep; | |
515 | switch (how) | |
516 | { | |
517 | case bfd_print_symbol_name: | |
518 | fprintf (file, "%s", symbol->name); | |
519 | break; | |
520 | case bfd_print_symbol_more: | |
521 | fprintf (file, "elf "); | |
522 | fprintf_vma (file, symbol->value); | |
523 | fprintf (file, " %lx", (long) symbol->flags); | |
524 | break; | |
525 | case bfd_print_symbol_all: | |
526 | { | |
527 | CONST char *section_name; | |
528 | section_name = symbol->section ? symbol->section->name : "(*none*)"; | |
529 | bfd_print_symbol_vandf ((PTR) file, symbol); | |
530 | fprintf (file, " %s\t", section_name); | |
531 | /* Print the "other" value for a symbol. For common symbols, | |
532 | we've already printed the size; now print the alignment. | |
533 | For other symbols, we have no specified alignment, and | |
534 | we've printed the address; now print the size. */ | |
535 | fprintf_vma (file, | |
536 | (bfd_is_com_section (symbol->section) | |
537 | ? ((elf_symbol_type *) symbol)->internal_elf_sym.st_value | |
538 | : ((elf_symbol_type *) symbol)->internal_elf_sym.st_size)); | |
539 | fprintf (file, " %s", symbol->name); | |
540 | } | |
541 | break; | |
542 | } | |
543 | } | |
544 | \f | |
013dec1a ILT |
545 | /* Create an entry in an ELF linker hash table. */ |
546 | ||
5315c428 ILT |
547 | struct bfd_hash_entry * |
548 | _bfd_elf_link_hash_newfunc (entry, table, string) | |
013dec1a ILT |
549 | struct bfd_hash_entry *entry; |
550 | struct bfd_hash_table *table; | |
551 | const char *string; | |
552 | { | |
553 | struct elf_link_hash_entry *ret = (struct elf_link_hash_entry *) entry; | |
554 | ||
555 | /* Allocate the structure if it has not already been allocated by a | |
556 | subclass. */ | |
557 | if (ret == (struct elf_link_hash_entry *) NULL) | |
558 | ret = ((struct elf_link_hash_entry *) | |
559 | bfd_hash_allocate (table, sizeof (struct elf_link_hash_entry))); | |
560 | if (ret == (struct elf_link_hash_entry *) NULL) | |
a9713b91 | 561 | return (struct bfd_hash_entry *) ret; |
013dec1a ILT |
562 | |
563 | /* Call the allocation method of the superclass. */ | |
564 | ret = ((struct elf_link_hash_entry *) | |
565 | _bfd_link_hash_newfunc ((struct bfd_hash_entry *) ret, | |
566 | table, string)); | |
567 | if (ret != (struct elf_link_hash_entry *) NULL) | |
568 | { | |
569 | /* Set local fields. */ | |
570 | ret->indx = -1; | |
571 | ret->size = 0; | |
013dec1a ILT |
572 | ret->dynindx = -1; |
573 | ret->dynstr_index = 0; | |
574 | ret->weakdef = NULL; | |
b176e1e9 ILT |
575 | ret->got_offset = (bfd_vma) -1; |
576 | ret->plt_offset = (bfd_vma) -1; | |
86aac8ea | 577 | ret->linker_section_pointer = (elf_linker_section_pointers_t *)0; |
013dec1a | 578 | ret->type = STT_NOTYPE; |
869b7d80 ILT |
579 | /* Assume that we have been called by a non-ELF symbol reader. |
580 | This flag is then reset by the code which reads an ELF input | |
581 | file. This ensures that a symbol created by a non-ELF symbol | |
582 | reader will have the flag set correctly. */ | |
583 | ret->elf_link_hash_flags = ELF_LINK_NON_ELF; | |
013dec1a ILT |
584 | } |
585 | ||
586 | return (struct bfd_hash_entry *) ret; | |
587 | } | |
588 | ||
5315c428 ILT |
589 | /* Initialize an ELF linker hash table. */ |
590 | ||
591 | boolean | |
592 | _bfd_elf_link_hash_table_init (table, abfd, newfunc) | |
593 | struct elf_link_hash_table *table; | |
594 | bfd *abfd; | |
595 | struct bfd_hash_entry *(*newfunc) PARAMS ((struct bfd_hash_entry *, | |
596 | struct bfd_hash_table *, | |
597 | const char *)); | |
598 | { | |
b176e1e9 | 599 | table->dynamic_sections_created = false; |
5315c428 | 600 | table->dynobj = NULL; |
b176e1e9 ILT |
601 | /* The first dynamic symbol is a dummy. */ |
602 | table->dynsymcount = 1; | |
5315c428 ILT |
603 | table->dynstr = NULL; |
604 | table->bucketcount = 0; | |
b176e1e9 | 605 | table->needed = NULL; |
19bfbcbe | 606 | table->hgot = NULL; |
d1bf45aa | 607 | table->stab_info = NULL; |
5315c428 ILT |
608 | return _bfd_link_hash_table_init (&table->root, abfd, newfunc); |
609 | } | |
610 | ||
013dec1a ILT |
611 | /* Create an ELF linker hash table. */ |
612 | ||
613 | struct bfd_link_hash_table * | |
614 | _bfd_elf_link_hash_table_create (abfd) | |
615 | bfd *abfd; | |
616 | { | |
617 | struct elf_link_hash_table *ret; | |
618 | ||
619 | ret = ((struct elf_link_hash_table *) | |
620 | bfd_alloc (abfd, sizeof (struct elf_link_hash_table))); | |
621 | if (ret == (struct elf_link_hash_table *) NULL) | |
a9713b91 | 622 | return NULL; |
5315c428 ILT |
623 | |
624 | if (! _bfd_elf_link_hash_table_init (ret, abfd, _bfd_elf_link_hash_newfunc)) | |
013dec1a ILT |
625 | { |
626 | bfd_release (abfd, ret); | |
627 | return NULL; | |
628 | } | |
629 | ||
013dec1a ILT |
630 | return &ret->root; |
631 | } | |
7c6da9ca ILT |
632 | |
633 | /* This is a hook for the ELF emulation code in the generic linker to | |
634 | tell the backend linker what file name to use for the DT_NEEDED | |
b176e1e9 ILT |
635 | entry for a dynamic object. The generic linker passes name as an |
636 | empty string to indicate that no DT_NEEDED entry should be made. */ | |
7c6da9ca ILT |
637 | |
638 | void | |
639 | bfd_elf_set_dt_needed_name (abfd, name) | |
640 | bfd *abfd; | |
641 | const char *name; | |
642 | { | |
053ae1d7 ILT |
643 | if (bfd_get_flavour (abfd) == bfd_target_elf_flavour |
644 | && bfd_get_format (abfd) == bfd_object) | |
645 | elf_dt_name (abfd) = name; | |
7c6da9ca | 646 | } |
b176e1e9 | 647 | |
053ae1d7 ILT |
648 | /* Get the list of DT_NEEDED entries for a link. This is a hook for |
649 | the ELF emulation code. */ | |
b176e1e9 | 650 | |
5fe14a9f | 651 | struct bfd_link_needed_list * |
b176e1e9 ILT |
652 | bfd_elf_get_needed_list (abfd, info) |
653 | bfd *abfd; | |
654 | struct bfd_link_info *info; | |
655 | { | |
b2193cc5 ILT |
656 | if (info->hash->creator->flavour != bfd_target_elf_flavour) |
657 | return NULL; | |
b176e1e9 ILT |
658 | return elf_hash_table (info)->needed; |
659 | } | |
053ae1d7 ILT |
660 | |
661 | /* Get the name actually used for a dynamic object for a link. This | |
662 | is the SONAME entry if there is one. Otherwise, it is the string | |
663 | passed to bfd_elf_set_dt_needed_name, or it is the filename. */ | |
664 | ||
665 | const char * | |
666 | bfd_elf_get_dt_soname (abfd) | |
667 | bfd *abfd; | |
668 | { | |
669 | if (bfd_get_flavour (abfd) == bfd_target_elf_flavour | |
670 | && bfd_get_format (abfd) == bfd_object) | |
671 | return elf_dt_name (abfd); | |
672 | return NULL; | |
673 | } | |
ede4eed4 KR |
674 | \f |
675 | /* Allocate an ELF string table--force the first byte to be zero. */ | |
676 | ||
677 | struct bfd_strtab_hash * | |
678 | _bfd_elf_stringtab_init () | |
679 | { | |
680 | struct bfd_strtab_hash *ret; | |
681 | ||
682 | ret = _bfd_stringtab_init (); | |
683 | if (ret != NULL) | |
684 | { | |
685 | bfd_size_type loc; | |
686 | ||
687 | loc = _bfd_stringtab_add (ret, "", true, false); | |
688 | BFD_ASSERT (loc == 0 || loc == (bfd_size_type) -1); | |
689 | if (loc == (bfd_size_type) -1) | |
690 | { | |
691 | _bfd_stringtab_free (ret); | |
692 | ret = NULL; | |
693 | } | |
694 | } | |
695 | return ret; | |
696 | } | |
697 | \f | |
698 | /* ELF .o/exec file reading */ | |
699 | ||
700 | /* Create a new bfd section from an ELF section header. */ | |
701 | ||
702 | boolean | |
703 | bfd_section_from_shdr (abfd, shindex) | |
704 | bfd *abfd; | |
705 | unsigned int shindex; | |
706 | { | |
707 | Elf_Internal_Shdr *hdr = elf_elfsections (abfd)[shindex]; | |
708 | Elf_Internal_Ehdr *ehdr = elf_elfheader (abfd); | |
709 | struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
710 | char *name; | |
711 | ||
712 | name = elf_string_from_elf_strtab (abfd, hdr->sh_name); | |
713 | ||
714 | switch (hdr->sh_type) | |
715 | { | |
716 | case SHT_NULL: | |
717 | /* Inactive section. Throw it away. */ | |
718 | return true; | |
719 | ||
720 | case SHT_PROGBITS: /* Normal section with contents. */ | |
721 | case SHT_DYNAMIC: /* Dynamic linking information. */ | |
722 | case SHT_NOBITS: /* .bss section. */ | |
723 | case SHT_HASH: /* .hash section. */ | |
5b3b9ff6 | 724 | case SHT_NOTE: /* .note section. */ |
ede4eed4 KR |
725 | return _bfd_elf_make_section_from_shdr (abfd, hdr, name); |
726 | ||
727 | case SHT_SYMTAB: /* A symbol table */ | |
728 | if (elf_onesymtab (abfd) == shindex) | |
729 | return true; | |
730 | ||
731 | BFD_ASSERT (hdr->sh_entsize == bed->s->sizeof_sym); | |
732 | BFD_ASSERT (elf_onesymtab (abfd) == 0); | |
733 | elf_onesymtab (abfd) = shindex; | |
734 | elf_tdata (abfd)->symtab_hdr = *hdr; | |
fd0198f0 | 735 | elf_elfsections (abfd)[shindex] = hdr = &elf_tdata (abfd)->symtab_hdr; |
ede4eed4 KR |
736 | abfd->flags |= HAS_SYMS; |
737 | ||
738 | /* Sometimes a shared object will map in the symbol table. If | |
739 | SHF_ALLOC is set, and this is a shared object, then we also | |
740 | treat this section as a BFD section. We can not base the | |
741 | decision purely on SHF_ALLOC, because that flag is sometimes | |
742 | set in a relocateable object file, which would confuse the | |
743 | linker. */ | |
744 | if ((hdr->sh_flags & SHF_ALLOC) != 0 | |
745 | && (abfd->flags & DYNAMIC) != 0 | |
746 | && ! _bfd_elf_make_section_from_shdr (abfd, hdr, name)) | |
747 | return false; | |
748 | ||
749 | return true; | |
750 | ||
751 | case SHT_DYNSYM: /* A dynamic symbol table */ | |
752 | if (elf_dynsymtab (abfd) == shindex) | |
753 | return true; | |
754 | ||
755 | BFD_ASSERT (hdr->sh_entsize == bed->s->sizeof_sym); | |
756 | BFD_ASSERT (elf_dynsymtab (abfd) == 0); | |
757 | elf_dynsymtab (abfd) = shindex; | |
758 | elf_tdata (abfd)->dynsymtab_hdr = *hdr; | |
fd0198f0 | 759 | elf_elfsections (abfd)[shindex] = hdr = &elf_tdata (abfd)->dynsymtab_hdr; |
ede4eed4 KR |
760 | abfd->flags |= HAS_SYMS; |
761 | ||
762 | /* Besides being a symbol table, we also treat this as a regular | |
763 | section, so that objcopy can handle it. */ | |
764 | return _bfd_elf_make_section_from_shdr (abfd, hdr, name); | |
765 | ||
766 | case SHT_STRTAB: /* A string table */ | |
767 | if (hdr->bfd_section != NULL) | |
768 | return true; | |
769 | if (ehdr->e_shstrndx == shindex) | |
770 | { | |
771 | elf_tdata (abfd)->shstrtab_hdr = *hdr; | |
772 | elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->shstrtab_hdr; | |
773 | return true; | |
774 | } | |
775 | { | |
776 | unsigned int i; | |
777 | ||
778 | for (i = 1; i < ehdr->e_shnum; i++) | |
779 | { | |
780 | Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i]; | |
781 | if (hdr2->sh_link == shindex) | |
782 | { | |
783 | if (! bfd_section_from_shdr (abfd, i)) | |
784 | return false; | |
785 | if (elf_onesymtab (abfd) == i) | |
786 | { | |
787 | elf_tdata (abfd)->strtab_hdr = *hdr; | |
788 | elf_elfsections (abfd)[shindex] = | |
789 | &elf_tdata (abfd)->strtab_hdr; | |
790 | return true; | |
791 | } | |
792 | if (elf_dynsymtab (abfd) == i) | |
793 | { | |
794 | elf_tdata (abfd)->dynstrtab_hdr = *hdr; | |
fd0198f0 | 795 | elf_elfsections (abfd)[shindex] = hdr = |
ede4eed4 KR |
796 | &elf_tdata (abfd)->dynstrtab_hdr; |
797 | /* We also treat this as a regular section, so | |
798 | that objcopy can handle it. */ | |
799 | break; | |
800 | } | |
801 | #if 0 /* Not handling other string tables specially right now. */ | |
802 | hdr2 = elf_elfsections (abfd)[i]; /* in case it moved */ | |
803 | /* We have a strtab for some random other section. */ | |
804 | newsect = (asection *) hdr2->bfd_section; | |
805 | if (!newsect) | |
806 | break; | |
807 | hdr->bfd_section = newsect; | |
808 | hdr2 = &elf_section_data (newsect)->str_hdr; | |
809 | *hdr2 = *hdr; | |
810 | elf_elfsections (abfd)[shindex] = hdr2; | |
811 | #endif | |
812 | } | |
813 | } | |
814 | } | |
815 | ||
816 | return _bfd_elf_make_section_from_shdr (abfd, hdr, name); | |
817 | ||
818 | case SHT_REL: | |
819 | case SHT_RELA: | |
820 | /* *These* do a lot of work -- but build no sections! */ | |
821 | { | |
822 | asection *target_sect; | |
823 | Elf_Internal_Shdr *hdr2; | |
ede4eed4 | 824 | |
ae115e51 ILT |
825 | /* For some incomprehensible reason Oracle distributes |
826 | libraries for Solaris in which some of the objects have | |
827 | bogus sh_link fields. It would be nice if we could just | |
828 | reject them, but, unfortunately, some people need to use | |
829 | them. We scan through the section headers; if we find only | |
830 | one suitable symbol table, we clobber the sh_link to point | |
831 | to it. I hope this doesn't break anything. */ | |
832 | if (elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_SYMTAB | |
833 | && elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_DYNSYM) | |
834 | { | |
835 | int scan; | |
836 | int found; | |
837 | ||
838 | found = 0; | |
839 | for (scan = 1; scan < ehdr->e_shnum; scan++) | |
840 | { | |
841 | if (elf_elfsections (abfd)[scan]->sh_type == SHT_SYMTAB | |
842 | || elf_elfsections (abfd)[scan]->sh_type == SHT_DYNSYM) | |
843 | { | |
844 | if (found != 0) | |
845 | { | |
846 | found = 0; | |
847 | break; | |
848 | } | |
849 | found = scan; | |
850 | } | |
851 | } | |
852 | if (found != 0) | |
853 | hdr->sh_link = found; | |
854 | } | |
855 | ||
ede4eed4 | 856 | /* Get the symbol table. */ |
ae115e51 ILT |
857 | if (elf_elfsections (abfd)[hdr->sh_link]->sh_type == SHT_SYMTAB |
858 | && ! bfd_section_from_shdr (abfd, hdr->sh_link)) | |
ede4eed4 KR |
859 | return false; |
860 | ||
861 | /* If this reloc section does not use the main symbol table we | |
862 | don't treat it as a reloc section. BFD can't adequately | |
863 | represent such a section, so at least for now, we don't | |
864 | try. We just present it as a normal section. */ | |
865 | if (hdr->sh_link != elf_onesymtab (abfd)) | |
866 | return _bfd_elf_make_section_from_shdr (abfd, hdr, name); | |
867 | ||
ede4eed4 KR |
868 | if (! bfd_section_from_shdr (abfd, hdr->sh_info)) |
869 | return false; | |
870 | target_sect = bfd_section_from_elf_index (abfd, hdr->sh_info); | |
871 | if (target_sect == NULL) | |
872 | return false; | |
873 | ||
d1bf45aa ILT |
874 | if ((target_sect->flags & SEC_RELOC) == 0 |
875 | || target_sect->reloc_count == 0) | |
876 | hdr2 = &elf_section_data (target_sect)->rel_hdr; | |
877 | else | |
878 | { | |
879 | BFD_ASSERT (elf_section_data (target_sect)->rel_hdr2 == NULL); | |
880 | hdr2 = (Elf_Internal_Shdr *) bfd_alloc (abfd, sizeof (*hdr2)); | |
881 | elf_section_data (target_sect)->rel_hdr2 = hdr2; | |
882 | } | |
ede4eed4 KR |
883 | *hdr2 = *hdr; |
884 | elf_elfsections (abfd)[shindex] = hdr2; | |
d1bf45aa | 885 | target_sect->reloc_count += hdr->sh_size / hdr->sh_entsize; |
ede4eed4 KR |
886 | target_sect->flags |= SEC_RELOC; |
887 | target_sect->relocation = NULL; | |
888 | target_sect->rel_filepos = hdr->sh_offset; | |
889 | abfd->flags |= HAS_RELOC; | |
890 | return true; | |
891 | } | |
892 | break; | |
893 | ||
ede4eed4 | 894 | case SHT_SHLIB: |
ede4eed4 KR |
895 | return true; |
896 | ||
897 | default: | |
898 | /* Check for any processor-specific section types. */ | |
899 | { | |
900 | if (bed->elf_backend_section_from_shdr) | |
901 | (*bed->elf_backend_section_from_shdr) (abfd, hdr, name); | |
902 | } | |
903 | break; | |
904 | } | |
905 | ||
906 | return true; | |
907 | } | |
908 | ||
909 | /* Given an ELF section number, retrieve the corresponding BFD | |
910 | section. */ | |
911 | ||
912 | asection * | |
913 | bfd_section_from_elf_index (abfd, index) | |
914 | bfd *abfd; | |
915 | unsigned int index; | |
916 | { | |
917 | BFD_ASSERT (index > 0 && index < SHN_LORESERVE); | |
918 | if (index >= elf_elfheader (abfd)->e_shnum) | |
919 | return NULL; | |
920 | return elf_elfsections (abfd)[index]->bfd_section; | |
921 | } | |
922 | ||
923 | boolean | |
924 | _bfd_elf_new_section_hook (abfd, sec) | |
925 | bfd *abfd; | |
926 | asection *sec; | |
927 | { | |
928 | struct bfd_elf_section_data *sdata; | |
929 | ||
930 | sdata = (struct bfd_elf_section_data *) bfd_alloc (abfd, sizeof (*sdata)); | |
931 | if (!sdata) | |
a9713b91 | 932 | return false; |
ede4eed4 KR |
933 | sec->used_by_bfd = (PTR) sdata; |
934 | memset (sdata, 0, sizeof (*sdata)); | |
935 | return true; | |
936 | } | |
937 | ||
938 | /* Create a new bfd section from an ELF program header. | |
939 | ||
940 | Since program segments have no names, we generate a synthetic name | |
941 | of the form segment<NUM>, where NUM is generally the index in the | |
942 | program header table. For segments that are split (see below) we | |
943 | generate the names segment<NUM>a and segment<NUM>b. | |
944 | ||
945 | Note that some program segments may have a file size that is different than | |
946 | (less than) the memory size. All this means is that at execution the | |
947 | system must allocate the amount of memory specified by the memory size, | |
948 | but only initialize it with the first "file size" bytes read from the | |
949 | file. This would occur for example, with program segments consisting | |
950 | of combined data+bss. | |
951 | ||
952 | To handle the above situation, this routine generates TWO bfd sections | |
953 | for the single program segment. The first has the length specified by | |
954 | the file size of the segment, and the second has the length specified | |
955 | by the difference between the two sizes. In effect, the segment is split | |
956 | into it's initialized and uninitialized parts. | |
957 | ||
958 | */ | |
959 | ||
960 | boolean | |
961 | bfd_section_from_phdr (abfd, hdr, index) | |
962 | bfd *abfd; | |
963 | Elf_Internal_Phdr *hdr; | |
964 | int index; | |
965 | { | |
966 | asection *newsect; | |
967 | char *name; | |
968 | char namebuf[64]; | |
969 | int split; | |
970 | ||
971 | split = ((hdr->p_memsz > 0) && | |
972 | (hdr->p_filesz > 0) && | |
973 | (hdr->p_memsz > hdr->p_filesz)); | |
974 | sprintf (namebuf, split ? "segment%da" : "segment%d", index); | |
975 | name = bfd_alloc (abfd, strlen (namebuf) + 1); | |
976 | if (!name) | |
a9713b91 | 977 | return false; |
ede4eed4 KR |
978 | strcpy (name, namebuf); |
979 | newsect = bfd_make_section (abfd, name); | |
980 | if (newsect == NULL) | |
981 | return false; | |
982 | newsect->vma = hdr->p_vaddr; | |
ae115e51 | 983 | newsect->lma = hdr->p_paddr; |
ede4eed4 KR |
984 | newsect->_raw_size = hdr->p_filesz; |
985 | newsect->filepos = hdr->p_offset; | |
986 | newsect->flags |= SEC_HAS_CONTENTS; | |
987 | if (hdr->p_type == PT_LOAD) | |
988 | { | |
989 | newsect->flags |= SEC_ALLOC; | |
990 | newsect->flags |= SEC_LOAD; | |
991 | if (hdr->p_flags & PF_X) | |
992 | { | |
993 | /* FIXME: all we known is that it has execute PERMISSION, | |
994 | may be data. */ | |
995 | newsect->flags |= SEC_CODE; | |
996 | } | |
997 | } | |
998 | if (!(hdr->p_flags & PF_W)) | |
999 | { | |
1000 | newsect->flags |= SEC_READONLY; | |
1001 | } | |
1002 | ||
1003 | if (split) | |
1004 | { | |
1005 | sprintf (namebuf, "segment%db", index); | |
1006 | name = bfd_alloc (abfd, strlen (namebuf) + 1); | |
1007 | if (!name) | |
a9713b91 | 1008 | return false; |
ede4eed4 KR |
1009 | strcpy (name, namebuf); |
1010 | newsect = bfd_make_section (abfd, name); | |
1011 | if (newsect == NULL) | |
1012 | return false; | |
1013 | newsect->vma = hdr->p_vaddr + hdr->p_filesz; | |
ae115e51 | 1014 | newsect->lma = hdr->p_paddr + hdr->p_filesz; |
ede4eed4 KR |
1015 | newsect->_raw_size = hdr->p_memsz - hdr->p_filesz; |
1016 | if (hdr->p_type == PT_LOAD) | |
1017 | { | |
1018 | newsect->flags |= SEC_ALLOC; | |
1019 | if (hdr->p_flags & PF_X) | |
1020 | newsect->flags |= SEC_CODE; | |
1021 | } | |
1022 | if (!(hdr->p_flags & PF_W)) | |
1023 | newsect->flags |= SEC_READONLY; | |
1024 | } | |
1025 | ||
1026 | return true; | |
1027 | } | |
1028 | ||
1029 | /* Set up an ELF internal section header for a section. */ | |
1030 | ||
1031 | /*ARGSUSED*/ | |
1032 | static void | |
1033 | elf_fake_sections (abfd, asect, failedptrarg) | |
1034 | bfd *abfd; | |
1035 | asection *asect; | |
1036 | PTR failedptrarg; | |
1037 | { | |
1038 | struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
1039 | boolean *failedptr = (boolean *) failedptrarg; | |
1040 | Elf_Internal_Shdr *this_hdr; | |
1041 | ||
1042 | if (*failedptr) | |
1043 | { | |
1044 | /* We already failed; just get out of the bfd_map_over_sections | |
1045 | loop. */ | |
1046 | return; | |
1047 | } | |
1048 | ||
1049 | this_hdr = &elf_section_data (asect)->this_hdr; | |
1050 | ||
1051 | this_hdr->sh_name = (unsigned long) _bfd_stringtab_add (elf_shstrtab (abfd), | |
1052 | asect->name, | |
1053 | true, false); | |
1054 | if (this_hdr->sh_name == (unsigned long) -1) | |
1055 | { | |
1056 | *failedptr = true; | |
1057 | return; | |
1058 | } | |
1059 | ||
1060 | this_hdr->sh_flags = 0; | |
ae115e51 | 1061 | |
50bd50d4 MH |
1062 | if ((asect->flags & SEC_ALLOC) != 0 |
1063 | || asect->user_set_vma) | |
fd0198f0 | 1064 | this_hdr->sh_addr = asect->vma; |
ede4eed4 KR |
1065 | else |
1066 | this_hdr->sh_addr = 0; | |
ae115e51 | 1067 | |
ede4eed4 KR |
1068 | this_hdr->sh_offset = 0; |
1069 | this_hdr->sh_size = asect->_raw_size; | |
1070 | this_hdr->sh_link = 0; | |
ede4eed4 | 1071 | this_hdr->sh_addralign = 1 << asect->alignment_power; |
fd0198f0 ILT |
1072 | /* The sh_entsize and sh_info fields may have been set already by |
1073 | copy_private_section_data. */ | |
ede4eed4 KR |
1074 | |
1075 | this_hdr->bfd_section = asect; | |
1076 | this_hdr->contents = NULL; | |
1077 | ||
1078 | /* FIXME: This should not be based on section names. */ | |
1079 | if (strcmp (asect->name, ".dynstr") == 0) | |
1080 | this_hdr->sh_type = SHT_STRTAB; | |
1081 | else if (strcmp (asect->name, ".hash") == 0) | |
1082 | { | |
1083 | this_hdr->sh_type = SHT_HASH; | |
1084 | this_hdr->sh_entsize = bed->s->arch_size / 8; | |
1085 | } | |
1086 | else if (strcmp (asect->name, ".dynsym") == 0) | |
1087 | { | |
1088 | this_hdr->sh_type = SHT_DYNSYM; | |
1089 | this_hdr->sh_entsize = bed->s->sizeof_sym; | |
1090 | } | |
1091 | else if (strcmp (asect->name, ".dynamic") == 0) | |
1092 | { | |
1093 | this_hdr->sh_type = SHT_DYNAMIC; | |
1094 | this_hdr->sh_entsize = bed->s->sizeof_dyn; | |
1095 | } | |
1096 | else if (strncmp (asect->name, ".rela", 5) == 0 | |
1097 | && get_elf_backend_data (abfd)->use_rela_p) | |
1098 | { | |
1099 | this_hdr->sh_type = SHT_RELA; | |
1100 | this_hdr->sh_entsize = bed->s->sizeof_rela; | |
1101 | } | |
1102 | else if (strncmp (asect->name, ".rel", 4) == 0 | |
1103 | && ! get_elf_backend_data (abfd)->use_rela_p) | |
1104 | { | |
1105 | this_hdr->sh_type = SHT_REL; | |
1106 | this_hdr->sh_entsize = bed->s->sizeof_rel; | |
1107 | } | |
1108 | else if (strcmp (asect->name, ".note") == 0) | |
1109 | this_hdr->sh_type = SHT_NOTE; | |
1110 | else if (strncmp (asect->name, ".stab", 5) == 0 | |
1111 | && strcmp (asect->name + strlen (asect->name) - 3, "str") == 0) | |
1112 | this_hdr->sh_type = SHT_STRTAB; | |
1113 | else if ((asect->flags & SEC_ALLOC) != 0 | |
1114 | && (asect->flags & SEC_LOAD) != 0) | |
1115 | this_hdr->sh_type = SHT_PROGBITS; | |
1116 | else if ((asect->flags & SEC_ALLOC) != 0 | |
1117 | && ((asect->flags & SEC_LOAD) == 0)) | |
5fe14a9f | 1118 | this_hdr->sh_type = SHT_NOBITS; |
ede4eed4 KR |
1119 | else |
1120 | { | |
1121 | /* Who knows? */ | |
1122 | this_hdr->sh_type = SHT_PROGBITS; | |
1123 | } | |
1124 | ||
1125 | if ((asect->flags & SEC_ALLOC) != 0) | |
1126 | this_hdr->sh_flags |= SHF_ALLOC; | |
1127 | if ((asect->flags & SEC_READONLY) == 0) | |
1128 | this_hdr->sh_flags |= SHF_WRITE; | |
1129 | if ((asect->flags & SEC_CODE) != 0) | |
1130 | this_hdr->sh_flags |= SHF_EXECINSTR; | |
1131 | ||
1132 | /* Check for processor-specific section types. */ | |
1133 | { | |
1134 | struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
1135 | ||
1136 | if (bed->elf_backend_fake_sections) | |
1137 | (*bed->elf_backend_fake_sections) (abfd, this_hdr, asect); | |
1138 | } | |
1139 | ||
1140 | /* If the section has relocs, set up a section header for the | |
1141 | SHT_REL[A] section. */ | |
1142 | if ((asect->flags & SEC_RELOC) != 0) | |
1143 | { | |
1144 | Elf_Internal_Shdr *rela_hdr; | |
1145 | int use_rela_p = get_elf_backend_data (abfd)->use_rela_p; | |
1146 | char *name; | |
1147 | ||
1148 | rela_hdr = &elf_section_data (asect)->rel_hdr; | |
1149 | name = bfd_alloc (abfd, sizeof ".rela" + strlen (asect->name)); | |
1150 | if (name == NULL) | |
1151 | { | |
ede4eed4 KR |
1152 | *failedptr = true; |
1153 | return; | |
1154 | } | |
1155 | sprintf (name, "%s%s", use_rela_p ? ".rela" : ".rel", asect->name); | |
1156 | rela_hdr->sh_name = | |
1157 | (unsigned int) _bfd_stringtab_add (elf_shstrtab (abfd), name, | |
1158 | true, false); | |
1159 | if (rela_hdr->sh_name == (unsigned int) -1) | |
1160 | { | |
1161 | *failedptr = true; | |
1162 | return; | |
1163 | } | |
1164 | rela_hdr->sh_type = use_rela_p ? SHT_RELA : SHT_REL; | |
1165 | rela_hdr->sh_entsize = (use_rela_p | |
1166 | ? bed->s->sizeof_rela | |
1167 | : bed->s->sizeof_rel); | |
1168 | rela_hdr->sh_addralign = bed->s->file_align; | |
1169 | rela_hdr->sh_flags = 0; | |
1170 | rela_hdr->sh_addr = 0; | |
1171 | rela_hdr->sh_size = 0; | |
1172 | rela_hdr->sh_offset = 0; | |
1173 | } | |
1174 | } | |
1175 | ||
1176 | /* Assign all ELF section numbers. The dummy first section is handled here | |
1177 | too. The link/info pointers for the standard section types are filled | |
1178 | in here too, while we're at it. */ | |
1179 | ||
1180 | static boolean | |
1181 | assign_section_numbers (abfd) | |
1182 | bfd *abfd; | |
1183 | { | |
1184 | struct elf_obj_tdata *t = elf_tdata (abfd); | |
1185 | asection *sec; | |
1186 | unsigned int section_number; | |
1187 | Elf_Internal_Shdr **i_shdrp; | |
1188 | struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
1189 | ||
1190 | section_number = 1; | |
1191 | ||
1192 | for (sec = abfd->sections; sec; sec = sec->next) | |
1193 | { | |
1194 | struct bfd_elf_section_data *d = elf_section_data (sec); | |
1195 | ||
1196 | d->this_idx = section_number++; | |
1197 | if ((sec->flags & SEC_RELOC) == 0) | |
1198 | d->rel_idx = 0; | |
1199 | else | |
1200 | d->rel_idx = section_number++; | |
1201 | } | |
1202 | ||
1203 | t->shstrtab_section = section_number++; | |
1204 | elf_elfheader (abfd)->e_shstrndx = t->shstrtab_section; | |
1205 | t->shstrtab_hdr.sh_size = _bfd_stringtab_size (elf_shstrtab (abfd)); | |
1206 | ||
1207 | if (abfd->symcount > 0) | |
1208 | { | |
1209 | t->symtab_section = section_number++; | |
1210 | t->strtab_section = section_number++; | |
1211 | } | |
1212 | ||
1213 | elf_elfheader (abfd)->e_shnum = section_number; | |
1214 | ||
1215 | /* Set up the list of section header pointers, in agreement with the | |
1216 | indices. */ | |
1217 | i_shdrp = ((Elf_Internal_Shdr **) | |
1218 | bfd_alloc (abfd, section_number * sizeof (Elf_Internal_Shdr *))); | |
1219 | if (i_shdrp == NULL) | |
a9713b91 | 1220 | return false; |
ede4eed4 KR |
1221 | |
1222 | i_shdrp[0] = ((Elf_Internal_Shdr *) | |
1223 | bfd_alloc (abfd, sizeof (Elf_Internal_Shdr))); | |
1224 | if (i_shdrp[0] == NULL) | |
1225 | { | |
1226 | bfd_release (abfd, i_shdrp); | |
ede4eed4 KR |
1227 | return false; |
1228 | } | |
1229 | memset (i_shdrp[0], 0, sizeof (Elf_Internal_Shdr)); | |
1230 | ||
1231 | elf_elfsections (abfd) = i_shdrp; | |
1232 | ||
1233 | i_shdrp[t->shstrtab_section] = &t->shstrtab_hdr; | |
1234 | if (abfd->symcount > 0) | |
1235 | { | |
1236 | i_shdrp[t->symtab_section] = &t->symtab_hdr; | |
1237 | i_shdrp[t->strtab_section] = &t->strtab_hdr; | |
1238 | t->symtab_hdr.sh_link = t->strtab_section; | |
1239 | } | |
1240 | for (sec = abfd->sections; sec; sec = sec->next) | |
1241 | { | |
1242 | struct bfd_elf_section_data *d = elf_section_data (sec); | |
1243 | asection *s; | |
1244 | const char *name; | |
1245 | ||
1246 | i_shdrp[d->this_idx] = &d->this_hdr; | |
1247 | if (d->rel_idx != 0) | |
1248 | i_shdrp[d->rel_idx] = &d->rel_hdr; | |
1249 | ||
1250 | /* Fill in the sh_link and sh_info fields while we're at it. */ | |
1251 | ||
1252 | /* sh_link of a reloc section is the section index of the symbol | |
1253 | table. sh_info is the section index of the section to which | |
1254 | the relocation entries apply. */ | |
1255 | if (d->rel_idx != 0) | |
1256 | { | |
1257 | d->rel_hdr.sh_link = t->symtab_section; | |
1258 | d->rel_hdr.sh_info = d->this_idx; | |
1259 | } | |
1260 | ||
1261 | switch (d->this_hdr.sh_type) | |
1262 | { | |
1263 | case SHT_REL: | |
1264 | case SHT_RELA: | |
1265 | /* A reloc section which we are treating as a normal BFD | |
1266 | section. sh_link is the section index of the symbol | |
1267 | table. sh_info is the section index of the section to | |
1268 | which the relocation entries apply. We assume that an | |
1269 | allocated reloc section uses the dynamic symbol table. | |
1270 | FIXME: How can we be sure? */ | |
1271 | s = bfd_get_section_by_name (abfd, ".dynsym"); | |
1272 | if (s != NULL) | |
1273 | d->this_hdr.sh_link = elf_section_data (s)->this_idx; | |
1274 | ||
1275 | /* We look up the section the relocs apply to by name. */ | |
1276 | name = sec->name; | |
1277 | if (d->this_hdr.sh_type == SHT_REL) | |
1278 | name += 4; | |
1279 | else | |
1280 | name += 5; | |
1281 | s = bfd_get_section_by_name (abfd, name); | |
1282 | if (s != NULL) | |
1283 | d->this_hdr.sh_info = elf_section_data (s)->this_idx; | |
1284 | break; | |
1285 | ||
1286 | case SHT_STRTAB: | |
1287 | /* We assume that a section named .stab*str is a stabs | |
1288 | string section. We look for a section with the same name | |
1289 | but without the trailing ``str'', and set its sh_link | |
1290 | field to point to this section. */ | |
1291 | if (strncmp (sec->name, ".stab", sizeof ".stab" - 1) == 0 | |
1292 | && strcmp (sec->name + strlen (sec->name) - 3, "str") == 0) | |
1293 | { | |
1294 | size_t len; | |
1295 | char *alc; | |
1296 | ||
1297 | len = strlen (sec->name); | |
58142f10 | 1298 | alc = (char *) bfd_malloc (len - 2); |
ede4eed4 | 1299 | if (alc == NULL) |
58142f10 | 1300 | return false; |
ede4eed4 KR |
1301 | strncpy (alc, sec->name, len - 3); |
1302 | alc[len - 3] = '\0'; | |
1303 | s = bfd_get_section_by_name (abfd, alc); | |
1304 | free (alc); | |
1305 | if (s != NULL) | |
1306 | { | |
1307 | elf_section_data (s)->this_hdr.sh_link = d->this_idx; | |
1308 | ||
1309 | /* This is a .stab section. */ | |
1310 | elf_section_data (s)->this_hdr.sh_entsize = | |
1311 | 4 + 2 * (bed->s->arch_size / 8); | |
1312 | } | |
1313 | } | |
1314 | break; | |
1315 | ||
1316 | case SHT_DYNAMIC: | |
1317 | case SHT_DYNSYM: | |
1318 | /* sh_link is the section header index of the string table | |
1319 | used for the dynamic entries or symbol table. */ | |
1320 | s = bfd_get_section_by_name (abfd, ".dynstr"); | |
1321 | if (s != NULL) | |
1322 | d->this_hdr.sh_link = elf_section_data (s)->this_idx; | |
1323 | break; | |
1324 | ||
1325 | case SHT_HASH: | |
1326 | /* sh_link is the section header index of the symbol table | |
1327 | this hash table is for. */ | |
1328 | s = bfd_get_section_by_name (abfd, ".dynsym"); | |
1329 | if (s != NULL) | |
1330 | d->this_hdr.sh_link = elf_section_data (s)->this_idx; | |
1331 | break; | |
1332 | } | |
1333 | } | |
1334 | ||
1335 | return true; | |
1336 | } | |
1337 | ||
1338 | /* Map symbol from it's internal number to the external number, moving | |
1339 | all local symbols to be at the head of the list. */ | |
1340 | ||
1341 | static INLINE int | |
1342 | sym_is_global (abfd, sym) | |
1343 | bfd *abfd; | |
1344 | asymbol *sym; | |
1345 | { | |
1346 | /* If the backend has a special mapping, use it. */ | |
1347 | if (get_elf_backend_data (abfd)->elf_backend_sym_is_global) | |
1348 | return ((*get_elf_backend_data (abfd)->elf_backend_sym_is_global) | |
1349 | (abfd, sym)); | |
1350 | ||
1351 | return ((sym->flags & (BSF_GLOBAL | BSF_WEAK)) != 0 | |
1352 | || bfd_is_und_section (bfd_get_section (sym)) | |
1353 | || bfd_is_com_section (bfd_get_section (sym))); | |
1354 | } | |
1355 | ||
1356 | static boolean | |
1357 | elf_map_symbols (abfd) | |
1358 | bfd *abfd; | |
1359 | { | |
1360 | int symcount = bfd_get_symcount (abfd); | |
1361 | asymbol **syms = bfd_get_outsymbols (abfd); | |
1362 | asymbol **sect_syms; | |
1363 | int num_locals = 0; | |
1364 | int num_globals = 0; | |
1365 | int num_locals2 = 0; | |
1366 | int num_globals2 = 0; | |
1367 | int max_index = 0; | |
1368 | int num_sections = 0; | |
1369 | int idx; | |
1370 | asection *asect; | |
1371 | asymbol **new_syms; | |
1372 | ||
1373 | #ifdef DEBUG | |
1374 | fprintf (stderr, "elf_map_symbols\n"); | |
1375 | fflush (stderr); | |
1376 | #endif | |
1377 | ||
1378 | /* Add a section symbol for each BFD section. FIXME: Is this really | |
1379 | necessary? */ | |
1380 | for (asect = abfd->sections; asect; asect = asect->next) | |
1381 | { | |
1382 | if (max_index < asect->index) | |
1383 | max_index = asect->index; | |
1384 | } | |
1385 | ||
1386 | max_index++; | |
1387 | sect_syms = (asymbol **) bfd_zalloc (abfd, max_index * sizeof (asymbol *)); | |
1388 | if (sect_syms == NULL) | |
a9713b91 | 1389 | return false; |
ede4eed4 KR |
1390 | elf_section_syms (abfd) = sect_syms; |
1391 | ||
1392 | for (idx = 0; idx < symcount; idx++) | |
1393 | { | |
1394 | if ((syms[idx]->flags & BSF_SECTION_SYM) != 0 | |
fd0198f0 | 1395 | && (syms[idx]->value + syms[idx]->section->vma) == 0) |
ede4eed4 KR |
1396 | { |
1397 | asection *sec; | |
1398 | ||
1399 | sec = syms[idx]->section; | |
1400 | if (sec->owner != NULL) | |
1401 | { | |
1402 | if (sec->owner != abfd) | |
1403 | { | |
1404 | if (sec->output_offset != 0) | |
1405 | continue; | |
1406 | sec = sec->output_section; | |
1407 | BFD_ASSERT (sec->owner == abfd); | |
1408 | } | |
1409 | sect_syms[sec->index] = syms[idx]; | |
1410 | } | |
1411 | } | |
1412 | } | |
1413 | ||
1414 | for (asect = abfd->sections; asect; asect = asect->next) | |
1415 | { | |
1416 | asymbol *sym; | |
1417 | ||
1418 | if (sect_syms[asect->index] != NULL) | |
1419 | continue; | |
1420 | ||
1421 | sym = bfd_make_empty_symbol (abfd); | |
1422 | if (sym == NULL) | |
1423 | return false; | |
1424 | sym->the_bfd = abfd; | |
1425 | sym->name = asect->name; | |
1426 | sym->value = 0; | |
1427 | /* Set the flags to 0 to indicate that this one was newly added. */ | |
1428 | sym->flags = 0; | |
1429 | sym->section = asect; | |
1430 | sect_syms[asect->index] = sym; | |
1431 | num_sections++; | |
1432 | #ifdef DEBUG | |
1433 | fprintf (stderr, | |
1434 | "creating section symbol, name = %s, value = 0x%.8lx, index = %d, section = 0x%.8lx\n", | |
1435 | asect->name, (long) asect->vma, asect->index, (long) asect); | |
1436 | #endif | |
1437 | } | |
1438 | ||
1439 | /* Classify all of the symbols. */ | |
1440 | for (idx = 0; idx < symcount; idx++) | |
1441 | { | |
1442 | if (!sym_is_global (abfd, syms[idx])) | |
1443 | num_locals++; | |
1444 | else | |
1445 | num_globals++; | |
1446 | } | |
1447 | for (asect = abfd->sections; asect; asect = asect->next) | |
1448 | { | |
1449 | if (sect_syms[asect->index] != NULL | |
1450 | && sect_syms[asect->index]->flags == 0) | |
1451 | { | |
1452 | sect_syms[asect->index]->flags = BSF_SECTION_SYM; | |
1453 | if (!sym_is_global (abfd, sect_syms[asect->index])) | |
1454 | num_locals++; | |
1455 | else | |
1456 | num_globals++; | |
1457 | sect_syms[asect->index]->flags = 0; | |
1458 | } | |
1459 | } | |
1460 | ||
1461 | /* Now sort the symbols so the local symbols are first. */ | |
1462 | new_syms = ((asymbol **) | |
1463 | bfd_alloc (abfd, | |
1464 | (num_locals + num_globals) * sizeof (asymbol *))); | |
1465 | if (new_syms == NULL) | |
a9713b91 | 1466 | return false; |
ede4eed4 KR |
1467 | |
1468 | for (idx = 0; idx < symcount; idx++) | |
1469 | { | |
1470 | asymbol *sym = syms[idx]; | |
1471 | int i; | |
1472 | ||
1473 | if (!sym_is_global (abfd, sym)) | |
1474 | i = num_locals2++; | |
1475 | else | |
1476 | i = num_locals + num_globals2++; | |
1477 | new_syms[i] = sym; | |
1478 | sym->udata.i = i + 1; | |
1479 | } | |
1480 | for (asect = abfd->sections; asect; asect = asect->next) | |
1481 | { | |
1482 | if (sect_syms[asect->index] != NULL | |
1483 | && sect_syms[asect->index]->flags == 0) | |
1484 | { | |
1485 | asymbol *sym = sect_syms[asect->index]; | |
1486 | int i; | |
1487 | ||
1488 | sym->flags = BSF_SECTION_SYM; | |
1489 | if (!sym_is_global (abfd, sym)) | |
1490 | i = num_locals2++; | |
1491 | else | |
1492 | i = num_locals + num_globals2++; | |
1493 | new_syms[i] = sym; | |
1494 | sym->udata.i = i + 1; | |
1495 | } | |
1496 | } | |
1497 | ||
1498 | bfd_set_symtab (abfd, new_syms, num_locals + num_globals); | |
1499 | ||
1500 | elf_num_locals (abfd) = num_locals; | |
1501 | elf_num_globals (abfd) = num_globals; | |
1502 | return true; | |
1503 | } | |
1504 | ||
fd0198f0 ILT |
1505 | /* Align to the maximum file alignment that could be required for any |
1506 | ELF data structure. */ | |
1507 | ||
1508 | static INLINE file_ptr align_file_position PARAMS ((file_ptr, int)); | |
1509 | static INLINE file_ptr | |
1510 | align_file_position (off, align) | |
1511 | file_ptr off; | |
1512 | int align; | |
1513 | { | |
1514 | return (off + align - 1) & ~(align - 1); | |
1515 | } | |
1516 | ||
1517 | /* Assign a file position to a section, optionally aligning to the | |
1518 | required section alignment. */ | |
1519 | ||
1520 | INLINE file_ptr | |
1521 | _bfd_elf_assign_file_position_for_section (i_shdrp, offset, align) | |
1522 | Elf_Internal_Shdr *i_shdrp; | |
1523 | file_ptr offset; | |
1524 | boolean align; | |
1525 | { | |
1526 | if (align) | |
1527 | { | |
1528 | unsigned int al; | |
1529 | ||
1530 | al = i_shdrp->sh_addralign; | |
1531 | if (al > 1) | |
1532 | offset = BFD_ALIGN (offset, al); | |
1533 | } | |
1534 | i_shdrp->sh_offset = offset; | |
1535 | if (i_shdrp->bfd_section != NULL) | |
1536 | i_shdrp->bfd_section->filepos = offset; | |
1537 | if (i_shdrp->sh_type != SHT_NOBITS) | |
1538 | offset += i_shdrp->sh_size; | |
1539 | return offset; | |
1540 | } | |
1541 | ||
ede4eed4 KR |
1542 | /* Compute the file positions we are going to put the sections at, and |
1543 | otherwise prepare to begin writing out the ELF file. If LINK_INFO | |
1544 | is not NULL, this is being called by the ELF backend linker. */ | |
1545 | ||
1546 | boolean | |
1547 | _bfd_elf_compute_section_file_positions (abfd, link_info) | |
1548 | bfd *abfd; | |
1549 | struct bfd_link_info *link_info; | |
1550 | { | |
1551 | struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
1552 | boolean failed; | |
1553 | struct bfd_strtab_hash *strtab; | |
1554 | Elf_Internal_Shdr *shstrtab_hdr; | |
1555 | ||
1556 | if (abfd->output_has_begun) | |
1557 | return true; | |
1558 | ||
1559 | /* Do any elf backend specific processing first. */ | |
1560 | if (bed->elf_backend_begin_write_processing) | |
1561 | (*bed->elf_backend_begin_write_processing) (abfd, link_info); | |
1562 | ||
1563 | if (! prep_headers (abfd)) | |
1564 | return false; | |
1565 | ||
1566 | failed = false; | |
1567 | bfd_map_over_sections (abfd, elf_fake_sections, &failed); | |
1568 | if (failed) | |
1569 | return false; | |
1570 | ||
1571 | if (!assign_section_numbers (abfd)) | |
1572 | return false; | |
1573 | ||
1574 | /* The backend linker builds symbol table information itself. */ | |
fd0198f0 | 1575 | if (link_info == NULL && abfd->symcount > 0) |
ede4eed4 KR |
1576 | { |
1577 | if (! swap_out_syms (abfd, &strtab)) | |
1578 | return false; | |
1579 | } | |
1580 | ||
1581 | shstrtab_hdr = &elf_tdata (abfd)->shstrtab_hdr; | |
1582 | /* sh_name was set in prep_headers. */ | |
1583 | shstrtab_hdr->sh_type = SHT_STRTAB; | |
1584 | shstrtab_hdr->sh_flags = 0; | |
1585 | shstrtab_hdr->sh_addr = 0; | |
1586 | shstrtab_hdr->sh_size = _bfd_stringtab_size (elf_shstrtab (abfd)); | |
1587 | shstrtab_hdr->sh_entsize = 0; | |
1588 | shstrtab_hdr->sh_link = 0; | |
1589 | shstrtab_hdr->sh_info = 0; | |
fd0198f0 | 1590 | /* sh_offset is set in assign_file_positions_except_relocs. */ |
ede4eed4 KR |
1591 | shstrtab_hdr->sh_addralign = 1; |
1592 | ||
fd0198f0 | 1593 | if (!assign_file_positions_except_relocs (abfd)) |
ede4eed4 KR |
1594 | return false; |
1595 | ||
fd0198f0 | 1596 | if (link_info == NULL && abfd->symcount > 0) |
ede4eed4 | 1597 | { |
fd0198f0 ILT |
1598 | file_ptr off; |
1599 | Elf_Internal_Shdr *hdr; | |
1600 | ||
1601 | off = elf_tdata (abfd)->next_file_pos; | |
1602 | ||
1603 | hdr = &elf_tdata (abfd)->symtab_hdr; | |
1604 | off = _bfd_elf_assign_file_position_for_section (hdr, off, true); | |
1605 | ||
1606 | hdr = &elf_tdata (abfd)->strtab_hdr; | |
1607 | off = _bfd_elf_assign_file_position_for_section (hdr, off, true); | |
1608 | ||
1609 | elf_tdata (abfd)->next_file_pos = off; | |
1610 | ||
ede4eed4 KR |
1611 | /* Now that we know where the .strtab section goes, write it |
1612 | out. */ | |
fd0198f0 | 1613 | if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0 |
ede4eed4 KR |
1614 | || ! _bfd_stringtab_emit (abfd, strtab)) |
1615 | return false; | |
1616 | _bfd_stringtab_free (strtab); | |
1617 | } | |
1618 | ||
1619 | abfd->output_has_begun = true; | |
1620 | ||
1621 | return true; | |
1622 | } | |
1623 | ||
fd0198f0 | 1624 | /* Create a mapping from a set of sections to a program segment. */ |
ede4eed4 | 1625 | |
fd0198f0 | 1626 | static INLINE struct elf_segment_map * |
edf3fe48 | 1627 | make_mapping (abfd, sections, from, to, phdr) |
fd0198f0 ILT |
1628 | bfd *abfd; |
1629 | asection **sections; | |
1630 | unsigned int from; | |
1631 | unsigned int to; | |
edf3fe48 | 1632 | boolean phdr; |
ede4eed4 | 1633 | { |
fd0198f0 ILT |
1634 | struct elf_segment_map *m; |
1635 | unsigned int i; | |
1636 | asection **hdrpp; | |
1637 | ||
1638 | m = ((struct elf_segment_map *) | |
1639 | bfd_zalloc (abfd, | |
1640 | (sizeof (struct elf_segment_map) | |
1641 | + (to - from - 1) * sizeof (asection *)))); | |
1642 | if (m == NULL) | |
a9713b91 | 1643 | return NULL; |
fd0198f0 ILT |
1644 | m->next = NULL; |
1645 | m->p_type = PT_LOAD; | |
1646 | for (i = from, hdrpp = sections + from; i < to; i++, hdrpp++) | |
1647 | m->sections[i - from] = *hdrpp; | |
1648 | m->count = to - from; | |
1649 | ||
edf3fe48 | 1650 | if (from == 0 && phdr) |
6933148a ILT |
1651 | { |
1652 | /* Include the headers in the first PT_LOAD segment. */ | |
1653 | m->includes_filehdr = 1; | |
1654 | m->includes_phdrs = 1; | |
1655 | } | |
1656 | ||
fd0198f0 | 1657 | return m; |
ede4eed4 KR |
1658 | } |
1659 | ||
fd0198f0 | 1660 | /* Set up a mapping from BFD sections to program segments. */ |
ede4eed4 | 1661 | |
fd0198f0 ILT |
1662 | static boolean |
1663 | map_sections_to_segments (abfd) | |
1664 | bfd *abfd; | |
ede4eed4 | 1665 | { |
fd0198f0 ILT |
1666 | asection **sections = NULL; |
1667 | asection *s; | |
1668 | unsigned int i; | |
1669 | unsigned int count; | |
1670 | struct elf_segment_map *mfirst; | |
1671 | struct elf_segment_map **pm; | |
1672 | struct elf_segment_map *m; | |
1673 | asection *last_hdr; | |
1674 | unsigned int phdr_index; | |
1675 | bfd_vma maxpagesize; | |
1676 | asection **hdrpp; | |
edf3fe48 ILT |
1677 | boolean phdr_in_section = true; |
1678 | boolean writable; | |
1679 | asection *dynsec; | |
fd0198f0 ILT |
1680 | |
1681 | if (elf_tdata (abfd)->segment_map != NULL) | |
1682 | return true; | |
1683 | ||
1684 | if (bfd_count_sections (abfd) == 0) | |
1685 | return true; | |
1686 | ||
1687 | /* Select the allocated sections, and sort them. */ | |
1688 | ||
58142f10 ILT |
1689 | sections = (asection **) bfd_malloc (bfd_count_sections (abfd) |
1690 | * sizeof (asection *)); | |
fd0198f0 | 1691 | if (sections == NULL) |
58142f10 | 1692 | goto error_return; |
ede4eed4 | 1693 | |
fd0198f0 ILT |
1694 | i = 0; |
1695 | for (s = abfd->sections; s != NULL; s = s->next) | |
1696 | { | |
1697 | if ((s->flags & SEC_ALLOC) != 0) | |
1698 | { | |
1699 | sections[i] = s; | |
1700 | ++i; | |
1701 | } | |
5fe14a9f | 1702 | } |
fd0198f0 ILT |
1703 | BFD_ASSERT (i <= bfd_count_sections (abfd)); |
1704 | count = i; | |
ede4eed4 | 1705 | |
fd0198f0 | 1706 | qsort (sections, (size_t) count, sizeof (asection *), elf_sort_sections); |
ede4eed4 | 1707 | |
fd0198f0 | 1708 | /* Build the mapping. */ |
ede4eed4 | 1709 | |
fd0198f0 ILT |
1710 | mfirst = NULL; |
1711 | pm = &mfirst; | |
ede4eed4 | 1712 | |
fd0198f0 ILT |
1713 | /* If we have a .interp section, then create a PT_PHDR segment for |
1714 | the program headers and a PT_INTERP segment for the .interp | |
1715 | section. */ | |
1716 | s = bfd_get_section_by_name (abfd, ".interp"); | |
1717 | if (s != NULL && (s->flags & SEC_LOAD) != 0) | |
1718 | { | |
1719 | m = ((struct elf_segment_map *) | |
1720 | bfd_zalloc (abfd, sizeof (struct elf_segment_map))); | |
1721 | if (m == NULL) | |
a9713b91 | 1722 | goto error_return; |
fd0198f0 ILT |
1723 | m->next = NULL; |
1724 | m->p_type = PT_PHDR; | |
1725 | /* FIXME: UnixWare and Solaris set PF_X, Irix 5 does not. */ | |
1726 | m->p_flags = PF_R | PF_X; | |
1727 | m->p_flags_valid = 1; | |
6933148a | 1728 | m->includes_phdrs = 1; |
ede4eed4 | 1729 | |
fd0198f0 ILT |
1730 | *pm = m; |
1731 | pm = &m->next; | |
ede4eed4 | 1732 | |
fd0198f0 ILT |
1733 | m = ((struct elf_segment_map *) |
1734 | bfd_zalloc (abfd, sizeof (struct elf_segment_map))); | |
1735 | if (m == NULL) | |
a9713b91 | 1736 | goto error_return; |
fd0198f0 ILT |
1737 | m->next = NULL; |
1738 | m->p_type = PT_INTERP; | |
1739 | m->count = 1; | |
1740 | m->sections[0] = s; | |
ede4eed4 | 1741 | |
fd0198f0 ILT |
1742 | *pm = m; |
1743 | pm = &m->next; | |
1744 | } | |
ede4eed4 | 1745 | |
fd0198f0 ILT |
1746 | /* Look through the sections. We put sections in the same program |
1747 | segment when the start of the second section can be placed within | |
1748 | a few bytes of the end of the first section. */ | |
1749 | last_hdr = NULL; | |
1750 | phdr_index = 0; | |
1751 | maxpagesize = get_elf_backend_data (abfd)->maxpagesize; | |
edf3fe48 ILT |
1752 | writable = false; |
1753 | dynsec = bfd_get_section_by_name (abfd, ".dynamic"); | |
1754 | if (dynsec != NULL | |
1755 | && (dynsec->flags & SEC_LOAD) == 0) | |
1756 | dynsec = NULL; | |
1757 | ||
7fc6a16a ILT |
1758 | /* Deal with -Ttext or something similar such that the first section |
1759 | is not adjacent to the program headers. This is an | |
1760 | approximation, since at this point we don't know exactly how many | |
1761 | program headers we will need. */ | |
1762 | if (count > 0) | |
1763 | { | |
1764 | bfd_size_type phdr_size; | |
1765 | ||
1766 | phdr_size = elf_tdata (abfd)->program_header_size; | |
1767 | if (phdr_size == 0) | |
1768 | phdr_size = get_elf_backend_data (abfd)->s->sizeof_phdr; | |
cdb88e87 ILT |
1769 | if ((abfd->flags & D_PAGED) == 0 |
1770 | || sections[0]->lma % maxpagesize < phdr_size % maxpagesize) | |
7fc6a16a ILT |
1771 | phdr_in_section = false; |
1772 | } | |
edf3fe48 | 1773 | |
fd0198f0 | 1774 | for (i = 0, hdrpp = sections; i < count; i++, hdrpp++) |
ede4eed4 | 1775 | { |
fd0198f0 | 1776 | asection *hdr; |
191d910c | 1777 | boolean new_segment; |
ede4eed4 | 1778 | |
fd0198f0 | 1779 | hdr = *hdrpp; |
ede4eed4 | 1780 | |
fd0198f0 | 1781 | /* See if this section and the last one will fit in the same |
191d910c ILT |
1782 | segment. */ |
1783 | ||
1784 | if (last_hdr == NULL) | |
1785 | { | |
1786 | /* If we don't have a segment yet, then we don't need a new | |
1787 | one (we build the last one after this loop). */ | |
1788 | new_segment = false; | |
1789 | } | |
1790 | else if (last_hdr->lma - last_hdr->vma != hdr->lma - hdr->vma) | |
1791 | { | |
1792 | /* If this section has a different relation between the | |
1793 | virtual address and the load address, then we need a new | |
1794 | segment. */ | |
1795 | new_segment = true; | |
1796 | } | |
191d910c ILT |
1797 | else if (BFD_ALIGN (last_hdr->lma + last_hdr->_raw_size, maxpagesize) |
1798 | < hdr->lma) | |
1799 | { | |
1800 | /* If putting this section in this segment would force us to | |
1801 | skip a page in the segment, then we need a new segment. */ | |
1802 | new_segment = true; | |
1803 | } | |
f0c12b73 DE |
1804 | else if ((abfd->flags & D_PAGED) == 0) |
1805 | { | |
1806 | /* If the file is not demand paged, which means that we | |
1807 | don't require the sections to be correctly aligned in the | |
1808 | file, then there is no other reason for a new segment. */ | |
1809 | new_segment = false; | |
1810 | } | |
191d910c ILT |
1811 | else if ((last_hdr->flags & SEC_LOAD) == 0 |
1812 | && (hdr->flags & SEC_LOAD) != 0) | |
1813 | { | |
1814 | /* We don't want to put a loadable section after a | |
1815 | nonloadable section in the same segment. */ | |
1816 | new_segment = true; | |
1817 | } | |
1818 | else if (! writable | |
1819 | && (hdr->flags & SEC_READONLY) == 0 | |
1820 | && (BFD_ALIGN (last_hdr->lma + last_hdr->_raw_size, maxpagesize) | |
1821 | == hdr->lma)) | |
1822 | { | |
1823 | /* We don't want to put a writable section in a read only | |
1824 | segment, unless they are on the same page in memory | |
1825 | anyhow. We already know that the last section does not | |
1826 | bring us past the current section on the page, so the | |
1827 | only case in which the new section is not on the same | |
1828 | page as the previous section is when the previous section | |
1829 | ends precisely on a page boundary. */ | |
1830 | new_segment = true; | |
1831 | } | |
1832 | else | |
1833 | { | |
1834 | /* Otherwise, we can use the same segment. */ | |
1835 | new_segment = false; | |
1836 | } | |
1837 | ||
1838 | if (! new_segment) | |
fd0198f0 | 1839 | { |
50bd50d4 MH |
1840 | if ((hdr->flags & SEC_READONLY) == 0) |
1841 | writable = true; | |
fd0198f0 ILT |
1842 | last_hdr = hdr; |
1843 | continue; | |
1844 | } | |
ede4eed4 | 1845 | |
191d910c ILT |
1846 | /* We need a new program segment. We must create a new program |
1847 | header holding all the sections from phdr_index until hdr. */ | |
ede4eed4 | 1848 | |
edf3fe48 | 1849 | m = make_mapping (abfd, sections, phdr_index, i, phdr_in_section); |
fd0198f0 ILT |
1850 | if (m == NULL) |
1851 | goto error_return; | |
ede4eed4 | 1852 | |
fd0198f0 ILT |
1853 | *pm = m; |
1854 | pm = &m->next; | |
ede4eed4 | 1855 | |
edf3fe48 ILT |
1856 | if ((hdr->flags & SEC_READONLY) == 0) |
1857 | writable = true; | |
50bd50d4 MH |
1858 | else |
1859 | writable = false; | |
edf3fe48 | 1860 | |
fd0198f0 ILT |
1861 | last_hdr = hdr; |
1862 | phdr_index = i; | |
edf3fe48 | 1863 | phdr_in_section = false; |
ede4eed4 | 1864 | } |
fd0198f0 ILT |
1865 | |
1866 | /* Create a final PT_LOAD program segment. */ | |
1867 | if (last_hdr != NULL) | |
ede4eed4 | 1868 | { |
edf3fe48 | 1869 | m = make_mapping (abfd, sections, phdr_index, i, phdr_in_section); |
fd0198f0 ILT |
1870 | if (m == NULL) |
1871 | goto error_return; | |
1872 | ||
1873 | *pm = m; | |
1874 | pm = &m->next; | |
ede4eed4 KR |
1875 | } |
1876 | ||
fd0198f0 | 1877 | /* If there is a .dynamic section, throw in a PT_DYNAMIC segment. */ |
edf3fe48 | 1878 | if (dynsec != NULL) |
ede4eed4 | 1879 | { |
fd0198f0 ILT |
1880 | m = ((struct elf_segment_map *) |
1881 | bfd_zalloc (abfd, sizeof (struct elf_segment_map))); | |
1882 | if (m == NULL) | |
a9713b91 | 1883 | goto error_return; |
fd0198f0 ILT |
1884 | m->next = NULL; |
1885 | m->p_type = PT_DYNAMIC; | |
1886 | m->count = 1; | |
edf3fe48 | 1887 | m->sections[0] = dynsec; |
ede4eed4 | 1888 | |
fd0198f0 ILT |
1889 | *pm = m; |
1890 | pm = &m->next; | |
ede4eed4 KR |
1891 | } |
1892 | ||
fd0198f0 ILT |
1893 | free (sections); |
1894 | sections = NULL; | |
ae115e51 | 1895 | |
fd0198f0 ILT |
1896 | elf_tdata (abfd)->segment_map = mfirst; |
1897 | return true; | |
1898 | ||
1899 | error_return: | |
1900 | if (sections != NULL) | |
1901 | free (sections); | |
1902 | return false; | |
ede4eed4 KR |
1903 | } |
1904 | ||
fd0198f0 | 1905 | /* Sort sections by VMA. */ |
ede4eed4 | 1906 | |
fd0198f0 ILT |
1907 | static int |
1908 | elf_sort_sections (arg1, arg2) | |
1909 | const PTR arg1; | |
1910 | const PTR arg2; | |
ede4eed4 | 1911 | { |
fd0198f0 ILT |
1912 | const asection *sec1 = *(const asection **) arg1; |
1913 | const asection *sec2 = *(const asection **) arg2; | |
ede4eed4 | 1914 | |
fd0198f0 ILT |
1915 | if (sec1->vma < sec2->vma) |
1916 | return -1; | |
1917 | else if (sec1->vma > sec2->vma) | |
1918 | return 1; | |
ede4eed4 | 1919 | |
cdb88e87 ILT |
1920 | /* Sort by LMA. Normally the LMA and the VMA will be the same, and |
1921 | this will do nothing. */ | |
1922 | if (sec1->lma < sec2->lma) | |
1923 | return -1; | |
1924 | else if (sec1->lma > sec2->lma) | |
1925 | return 1; | |
1926 | ||
fd0198f0 | 1927 | /* Put !SEC_LOAD sections after SEC_LOAD ones. */ |
ede4eed4 | 1928 | |
fd0198f0 | 1929 | #define TOEND(x) (((x)->flags & SEC_LOAD) == 0) |
ede4eed4 | 1930 | |
fd0198f0 ILT |
1931 | if (TOEND (sec1)) |
1932 | if (TOEND (sec2)) | |
1933 | return sec1->target_index - sec2->target_index; | |
1934 | else | |
1935 | return 1; | |
ede4eed4 | 1936 | |
fd0198f0 ILT |
1937 | if (TOEND (sec2)) |
1938 | return -1; | |
ede4eed4 | 1939 | |
fd0198f0 | 1940 | #undef TOEND |
ede4eed4 | 1941 | |
fd0198f0 ILT |
1942 | /* Sort by size, to put zero sized sections before others at the |
1943 | same address. */ | |
ede4eed4 | 1944 | |
fd0198f0 ILT |
1945 | if (sec1->_raw_size < sec2->_raw_size) |
1946 | return -1; | |
1947 | if (sec1->_raw_size > sec2->_raw_size) | |
1948 | return 1; | |
ede4eed4 | 1949 | |
fd0198f0 ILT |
1950 | return sec1->target_index - sec2->target_index; |
1951 | } | |
ede4eed4 | 1952 | |
fd0198f0 ILT |
1953 | /* Assign file positions to the sections based on the mapping from |
1954 | sections to segments. This function also sets up some fields in | |
1955 | the file header, and writes out the program headers. */ | |
ede4eed4 | 1956 | |
fd0198f0 ILT |
1957 | static boolean |
1958 | assign_file_positions_for_segments (abfd) | |
1959 | bfd *abfd; | |
1960 | { | |
1961 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
1962 | unsigned int count; | |
1963 | struct elf_segment_map *m; | |
1964 | unsigned int alloc; | |
1965 | Elf_Internal_Phdr *phdrs; | |
64f808f9 | 1966 | file_ptr off, voff; |
6933148a ILT |
1967 | bfd_vma filehdr_vaddr, filehdr_paddr; |
1968 | bfd_vma phdrs_vaddr, phdrs_paddr; | |
fd0198f0 ILT |
1969 | Elf_Internal_Phdr *p; |
1970 | ||
1971 | if (elf_tdata (abfd)->segment_map == NULL) | |
1972 | { | |
1973 | if (! map_sections_to_segments (abfd)) | |
1974 | return false; | |
1975 | } | |
ede4eed4 | 1976 | |
5b3b9ff6 ILT |
1977 | if (bed->elf_backend_modify_segment_map) |
1978 | { | |
1979 | if (! (*bed->elf_backend_modify_segment_map) (abfd)) | |
1980 | return false; | |
1981 | } | |
1982 | ||
fd0198f0 ILT |
1983 | count = 0; |
1984 | for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next) | |
1985 | ++count; | |
ede4eed4 | 1986 | |
fd0198f0 ILT |
1987 | elf_elfheader (abfd)->e_phoff = bed->s->sizeof_ehdr; |
1988 | elf_elfheader (abfd)->e_phentsize = bed->s->sizeof_phdr; | |
1989 | elf_elfheader (abfd)->e_phnum = count; | |
ede4eed4 | 1990 | |
fd0198f0 ILT |
1991 | if (count == 0) |
1992 | return true; | |
ede4eed4 | 1993 | |
fd0198f0 ILT |
1994 | /* If we already counted the number of program segments, make sure |
1995 | that we allocated enough space. This happens when SIZEOF_HEADERS | |
1996 | is used in a linker script. */ | |
1997 | alloc = elf_tdata (abfd)->program_header_size / bed->s->sizeof_phdr; | |
1998 | if (alloc != 0 && count > alloc) | |
1999 | { | |
2000 | ((*_bfd_error_handler) | |
2001 | ("%s: Not enough room for program headers (allocated %u, need %u)", | |
2002 | bfd_get_filename (abfd), alloc, count)); | |
2003 | bfd_set_error (bfd_error_bad_value); | |
2004 | return false; | |
ede4eed4 KR |
2005 | } |
2006 | ||
fd0198f0 ILT |
2007 | if (alloc == 0) |
2008 | alloc = count; | |
2009 | ||
2010 | phdrs = ((Elf_Internal_Phdr *) | |
2011 | bfd_alloc (abfd, alloc * sizeof (Elf_Internal_Phdr))); | |
2012 | if (phdrs == NULL) | |
a9713b91 | 2013 | return false; |
ede4eed4 | 2014 | |
fd0198f0 ILT |
2015 | off = bed->s->sizeof_ehdr; |
2016 | off += alloc * bed->s->sizeof_phdr; | |
ede4eed4 | 2017 | |
6933148a ILT |
2018 | filehdr_vaddr = 0; |
2019 | filehdr_paddr = 0; | |
2020 | phdrs_vaddr = 0; | |
2021 | phdrs_paddr = 0; | |
fd0198f0 ILT |
2022 | for (m = elf_tdata (abfd)->segment_map, p = phdrs; |
2023 | m != NULL; | |
2024 | m = m->next, p++) | |
2025 | { | |
2026 | unsigned int i; | |
2027 | asection **secpp; | |
fd0198f0 | 2028 | |
3b950780 ILT |
2029 | /* If elf_segment_map is not from map_sections_to_segments, the |
2030 | sections may not be correctly ordered. */ | |
2031 | if (m->count > 0) | |
2032 | qsort (m->sections, (size_t) m->count, sizeof (asection *), | |
2033 | elf_sort_sections); | |
2034 | ||
fd0198f0 ILT |
2035 | p->p_type = m->p_type; |
2036 | ||
2037 | if (m->p_flags_valid) | |
2038 | p->p_flags = m->p_flags; | |
14899eb7 ILT |
2039 | else |
2040 | p->p_flags = 0; | |
fd0198f0 | 2041 | |
d49ddb85 ILT |
2042 | if (p->p_type == PT_LOAD |
2043 | && m->count > 0 | |
d7775b43 | 2044 | && (m->sections[0]->flags & SEC_ALLOC) != 0) |
cdb88e87 ILT |
2045 | { |
2046 | if ((abfd->flags & D_PAGED) != 0) | |
2047 | off += (m->sections[0]->vma - off) % bed->maxpagesize; | |
2048 | else | |
2049 | off += ((m->sections[0]->vma - off) | |
2050 | % (1 << bfd_get_section_alignment (abfd, m->sections[0]))); | |
2051 | } | |
44ef8897 | 2052 | |
fd0198f0 ILT |
2053 | if (m->count == 0) |
2054 | p->p_vaddr = 0; | |
2055 | else | |
2056 | p->p_vaddr = m->sections[0]->vma; | |
ede4eed4 | 2057 | |
fd0198f0 ILT |
2058 | if (m->p_paddr_valid) |
2059 | p->p_paddr = m->p_paddr; | |
2060 | else if (m->count == 0) | |
2061 | p->p_paddr = 0; | |
2062 | else | |
2063 | p->p_paddr = m->sections[0]->lma; | |
2064 | ||
cdb88e87 ILT |
2065 | if (p->p_type == PT_LOAD |
2066 | && (abfd->flags & D_PAGED) != 0) | |
fd0198f0 ILT |
2067 | p->p_align = bed->maxpagesize; |
2068 | else if (m->count == 0) | |
2069 | p->p_align = bed->s->file_align; | |
2070 | else | |
2071 | p->p_align = 0; | |
2072 | ||
6933148a | 2073 | p->p_offset = 0; |
fd0198f0 ILT |
2074 | p->p_filesz = 0; |
2075 | p->p_memsz = 0; | |
2076 | ||
6933148a | 2077 | if (m->includes_filehdr) |
ede4eed4 | 2078 | { |
14899eb7 ILT |
2079 | if (! m->p_flags_valid) |
2080 | p->p_flags |= PF_R; | |
6933148a ILT |
2081 | p->p_offset = 0; |
2082 | p->p_filesz = bed->s->sizeof_ehdr; | |
2083 | p->p_memsz = bed->s->sizeof_ehdr; | |
2084 | if (m->count > 0) | |
2085 | { | |
2086 | BFD_ASSERT (p->p_type == PT_LOAD); | |
2087 | p->p_vaddr -= off; | |
2088 | if (! m->p_paddr_valid) | |
2089 | p->p_paddr -= off; | |
2090 | } | |
2091 | if (p->p_type == PT_LOAD) | |
2092 | { | |
2093 | filehdr_vaddr = p->p_vaddr; | |
2094 | filehdr_paddr = p->p_paddr; | |
2095 | } | |
2096 | } | |
fd0198f0 | 2097 | |
6933148a ILT |
2098 | if (m->includes_phdrs) |
2099 | { | |
14899eb7 ILT |
2100 | if (! m->p_flags_valid) |
2101 | p->p_flags |= PF_R; | |
6933148a | 2102 | if (m->includes_filehdr) |
fd0198f0 | 2103 | { |
6933148a | 2104 | if (p->p_type == PT_LOAD) |
fd0198f0 | 2105 | { |
6933148a ILT |
2106 | phdrs_vaddr = p->p_vaddr + bed->s->sizeof_ehdr; |
2107 | phdrs_paddr = p->p_paddr + bed->s->sizeof_ehdr; | |
fd0198f0 | 2108 | } |
6933148a ILT |
2109 | } |
2110 | else | |
2111 | { | |
2112 | p->p_offset = bed->s->sizeof_ehdr; | |
2113 | if (m->count > 0) | |
2114 | { | |
2115 | BFD_ASSERT (p->p_type == PT_LOAD); | |
2116 | p->p_vaddr -= off - p->p_offset; | |
2117 | if (! m->p_paddr_valid) | |
2118 | p->p_paddr -= off - p->p_offset; | |
2119 | } | |
2120 | if (p->p_type == PT_LOAD) | |
fd0198f0 | 2121 | { |
6933148a ILT |
2122 | phdrs_vaddr = p->p_vaddr; |
2123 | phdrs_paddr = p->p_paddr; | |
fd0198f0 | 2124 | } |
6933148a ILT |
2125 | } |
2126 | p->p_filesz += alloc * bed->s->sizeof_phdr; | |
2127 | p->p_memsz += alloc * bed->s->sizeof_phdr; | |
2128 | } | |
2129 | ||
2130 | if (p->p_type == PT_LOAD) | |
2131 | { | |
2132 | if (! m->includes_filehdr && ! m->includes_phdrs) | |
2133 | p->p_offset = off; | |
2134 | else | |
2135 | { | |
2136 | file_ptr adjust; | |
fd0198f0 | 2137 | |
6933148a ILT |
2138 | adjust = off - (p->p_offset + p->p_filesz); |
2139 | p->p_filesz += adjust; | |
2140 | p->p_memsz += adjust; | |
fd0198f0 | 2141 | } |
ede4eed4 KR |
2142 | } |
2143 | ||
64f808f9 | 2144 | voff = off; |
fd0198f0 | 2145 | for (i = 0, secpp = m->sections; i < m->count; i++, secpp++) |
ede4eed4 | 2146 | { |
fd0198f0 ILT |
2147 | asection *sec; |
2148 | flagword flags; | |
2149 | bfd_size_type align; | |
2150 | ||
2151 | sec = *secpp; | |
2152 | flags = sec->flags; | |
cdb88e87 | 2153 | align = 1 << bfd_get_section_alignment (abfd, sec); |
fd0198f0 ILT |
2154 | |
2155 | if (p->p_type == PT_LOAD) | |
2156 | { | |
2157 | bfd_vma adjust; | |
2158 | ||
2159 | /* The section VMA must equal the file position modulo | |
2160 | the page size. */ | |
09609415 | 2161 | if ((flags & SEC_ALLOC) != 0) |
fd0198f0 | 2162 | { |
cdb88e87 ILT |
2163 | if ((abfd->flags & D_PAGED) != 0) |
2164 | adjust = (sec->vma - voff) % bed->maxpagesize; | |
2165 | else | |
2166 | adjust = (sec->vma - voff) % align; | |
d49ddb85 ILT |
2167 | if (adjust != 0) |
2168 | { | |
2169 | if (i == 0) | |
2170 | abort (); | |
2171 | p->p_memsz += adjust; | |
19bfbcbe | 2172 | off += adjust; |
64f808f9 | 2173 | voff += adjust; |
d49ddb85 | 2174 | if ((flags & SEC_LOAD) != 0) |
19bfbcbe | 2175 | p->p_filesz += adjust; |
d49ddb85 | 2176 | } |
fd0198f0 ILT |
2177 | } |
2178 | ||
2179 | sec->filepos = off; | |
2180 | ||
2181 | if ((flags & SEC_LOAD) != 0) | |
2182 | off += sec->_raw_size; | |
64f808f9 ILT |
2183 | if ((flags & SEC_ALLOC) != 0) |
2184 | voff += sec->_raw_size; | |
fd0198f0 ILT |
2185 | } |
2186 | ||
2187 | p->p_memsz += sec->_raw_size; | |
2188 | ||
2189 | if ((flags & SEC_LOAD) != 0) | |
2190 | p->p_filesz += sec->_raw_size; | |
2191 | ||
fd0198f0 ILT |
2192 | if (align > p->p_align) |
2193 | p->p_align = align; | |
2194 | ||
2195 | if (! m->p_flags_valid) | |
2196 | { | |
14899eb7 | 2197 | p->p_flags |= PF_R; |
fd0198f0 ILT |
2198 | if ((flags & SEC_CODE) != 0) |
2199 | p->p_flags |= PF_X; | |
2200 | if ((flags & SEC_READONLY) == 0) | |
2201 | p->p_flags |= PF_W; | |
2202 | } | |
ede4eed4 | 2203 | } |
fd0198f0 | 2204 | } |
ede4eed4 | 2205 | |
fd0198f0 ILT |
2206 | /* Now that we have set the section file positions, we can set up |
2207 | the file positions for the non PT_LOAD segments. */ | |
2208 | for (m = elf_tdata (abfd)->segment_map, p = phdrs; | |
2209 | m != NULL; | |
2210 | m = m->next, p++) | |
2211 | { | |
2212 | if (p->p_type != PT_LOAD && m->count > 0) | |
ede4eed4 | 2213 | { |
6933148a ILT |
2214 | BFD_ASSERT (! m->includes_filehdr && ! m->includes_phdrs); |
2215 | p->p_offset = m->sections[0]->filepos; | |
2216 | } | |
2217 | if (m->count == 0) | |
2218 | { | |
2219 | if (m->includes_filehdr) | |
2220 | { | |
2221 | p->p_vaddr = filehdr_vaddr; | |
2222 | if (! m->p_paddr_valid) | |
2223 | p->p_paddr = filehdr_paddr; | |
2224 | } | |
2225 | else if (m->includes_phdrs) | |
2226 | { | |
2227 | p->p_vaddr = phdrs_vaddr; | |
2228 | if (! m->p_paddr_valid) | |
2229 | p->p_paddr = phdrs_paddr; | |
2230 | } | |
ede4eed4 | 2231 | } |
ede4eed4 KR |
2232 | } |
2233 | ||
fd0198f0 ILT |
2234 | /* Clear out any program headers we allocated but did not use. */ |
2235 | for (; count < alloc; count++, p++) | |
ede4eed4 | 2236 | { |
fd0198f0 ILT |
2237 | memset (p, 0, sizeof *p); |
2238 | p->p_type = PT_NULL; | |
ede4eed4 KR |
2239 | } |
2240 | ||
fd0198f0 | 2241 | elf_tdata (abfd)->phdr = phdrs; |
ede4eed4 | 2242 | |
fd0198f0 | 2243 | elf_tdata (abfd)->next_file_pos = off; |
ede4eed4 | 2244 | |
fd0198f0 ILT |
2245 | /* Write out the program headers. */ |
2246 | if (bfd_seek (abfd, bed->s->sizeof_ehdr, SEEK_SET) != 0 | |
2247 | || bed->s->write_out_phdrs (abfd, phdrs, alloc) != 0) | |
2248 | return false; | |
2249 | ||
2250 | return true; | |
2251 | } | |
2252 | ||
2253 | /* Get the size of the program header. | |
2254 | ||
2255 | If this is called by the linker before any of the section VMA's are set, it | |
2256 | can't calculate the correct value for a strange memory layout. This only | |
2257 | happens when SIZEOF_HEADERS is used in a linker script. In this case, | |
2258 | SORTED_HDRS is NULL and we assume the normal scenario of one text and one | |
2259 | data segment (exclusive of .interp and .dynamic). | |
2260 | ||
2261 | ??? User written scripts must either not use SIZEOF_HEADERS, or assume there | |
2262 | will be two segments. */ | |
2263 | ||
2264 | static bfd_size_type | |
2265 | get_program_header_size (abfd) | |
2266 | bfd *abfd; | |
2267 | { | |
2268 | size_t segs; | |
2269 | asection *s; | |
2270 | struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
2271 | ||
2272 | /* We can't return a different result each time we're called. */ | |
2273 | if (elf_tdata (abfd)->program_header_size != 0) | |
2274 | return elf_tdata (abfd)->program_header_size; | |
ae115e51 | 2275 | |
3b950780 ILT |
2276 | if (elf_tdata (abfd)->segment_map != NULL) |
2277 | { | |
2278 | struct elf_segment_map *m; | |
2279 | ||
2280 | segs = 0; | |
2281 | for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next) | |
2282 | ++segs; | |
2283 | elf_tdata (abfd)->program_header_size = segs * bed->s->sizeof_phdr; | |
2284 | return elf_tdata (abfd)->program_header_size; | |
2285 | } | |
2286 | ||
fd0198f0 ILT |
2287 | /* Assume we will need exactly two PT_LOAD segments: one for text |
2288 | and one for data. */ | |
2289 | segs = 2; | |
2290 | ||
2291 | s = bfd_get_section_by_name (abfd, ".interp"); | |
2292 | if (s != NULL && (s->flags & SEC_LOAD) != 0) | |
ede4eed4 | 2293 | { |
fd0198f0 ILT |
2294 | /* If we have a loadable interpreter section, we need a |
2295 | PT_INTERP segment. In this case, assume we also need a | |
2296 | PT_PHDR segment, although that may not be true for all | |
2297 | targets. */ | |
2298 | segs += 2; | |
ede4eed4 KR |
2299 | } |
2300 | ||
fd0198f0 | 2301 | if (bfd_get_section_by_name (abfd, ".dynamic") != NULL) |
ede4eed4 | 2302 | { |
fd0198f0 ILT |
2303 | /* We need a PT_DYNAMIC segment. */ |
2304 | ++segs; | |
ede4eed4 | 2305 | } |
ede4eed4 | 2306 | |
fd0198f0 | 2307 | /* Let the backend count up any program headers it might need. */ |
5b3b9ff6 ILT |
2308 | if (bed->elf_backend_additional_program_headers) |
2309 | { | |
2310 | int a; | |
2311 | ||
2312 | a = (*bed->elf_backend_additional_program_headers) (abfd); | |
2313 | if (a == -1) | |
2314 | abort (); | |
2315 | segs += a; | |
2316 | } | |
ede4eed4 | 2317 | |
fd0198f0 ILT |
2318 | elf_tdata (abfd)->program_header_size = segs * bed->s->sizeof_phdr; |
2319 | return elf_tdata (abfd)->program_header_size; | |
ede4eed4 KR |
2320 | } |
2321 | ||
2322 | /* Work out the file positions of all the sections. This is called by | |
2323 | _bfd_elf_compute_section_file_positions. All the section sizes and | |
2324 | VMAs must be known before this is called. | |
2325 | ||
2326 | We do not consider reloc sections at this point, unless they form | |
2327 | part of the loadable image. Reloc sections are assigned file | |
2328 | positions in assign_file_positions_for_relocs, which is called by | |
2329 | write_object_contents and final_link. | |
2330 | ||
fd0198f0 | 2331 | We also don't set the positions of the .symtab and .strtab here. */ |
ede4eed4 KR |
2332 | |
2333 | static boolean | |
fd0198f0 | 2334 | assign_file_positions_except_relocs (abfd) |
ede4eed4 | 2335 | bfd *abfd; |
ede4eed4 KR |
2336 | { |
2337 | struct elf_obj_tdata * const tdata = elf_tdata (abfd); | |
2338 | Elf_Internal_Ehdr * const i_ehdrp = elf_elfheader (abfd); | |
2339 | Elf_Internal_Shdr ** const i_shdrpp = elf_elfsections (abfd); | |
2340 | file_ptr off; | |
2341 | struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
2342 | ||
ede4eed4 KR |
2343 | if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0) |
2344 | { | |
2345 | Elf_Internal_Shdr **hdrpp; | |
2346 | unsigned int i; | |
2347 | ||
fd0198f0 ILT |
2348 | /* Start after the ELF header. */ |
2349 | off = i_ehdrp->e_ehsize; | |
2350 | ||
ede4eed4 KR |
2351 | /* We are not creating an executable, which means that we are |
2352 | not creating a program header, and that the actual order of | |
2353 | the sections in the file is unimportant. */ | |
2354 | for (i = 1, hdrpp = i_shdrpp + 1; i < i_ehdrp->e_shnum; i++, hdrpp++) | |
2355 | { | |
2356 | Elf_Internal_Shdr *hdr; | |
2357 | ||
2358 | hdr = *hdrpp; | |
2359 | if (hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA) | |
2360 | { | |
2361 | hdr->sh_offset = -1; | |
2362 | continue; | |
2363 | } | |
fd0198f0 ILT |
2364 | if (i == tdata->symtab_section |
2365 | || i == tdata->strtab_section) | |
ede4eed4 KR |
2366 | { |
2367 | hdr->sh_offset = -1; | |
2368 | continue; | |
2369 | } | |
2370 | ||
5fe14a9f | 2371 | off = _bfd_elf_assign_file_position_for_section (hdr, off, true); |
ede4eed4 KR |
2372 | } |
2373 | } | |
2374 | else | |
2375 | { | |
ede4eed4 | 2376 | unsigned int i; |
fd0198f0 | 2377 | Elf_Internal_Shdr **hdrpp; |
ede4eed4 | 2378 | |
fd0198f0 ILT |
2379 | /* Assign file positions for the loaded sections based on the |
2380 | assignment of sections to segments. */ | |
2381 | if (! assign_file_positions_for_segments (abfd)) | |
ede4eed4 KR |
2382 | return false; |
2383 | ||
fd0198f0 ILT |
2384 | /* Assign file positions for the other sections. */ |
2385 | ||
2386 | off = elf_tdata (abfd)->next_file_pos; | |
2387 | for (i = 1, hdrpp = i_shdrpp + 1; i < i_ehdrp->e_shnum; i++, hdrpp++) | |
ede4eed4 KR |
2388 | { |
2389 | Elf_Internal_Shdr *hdr; | |
2390 | ||
2391 | hdr = *hdrpp; | |
fd0198f0 ILT |
2392 | if (hdr->bfd_section != NULL |
2393 | && hdr->bfd_section->filepos != 0) | |
2394 | hdr->sh_offset = hdr->bfd_section->filepos; | |
2395 | else if ((hdr->sh_flags & SHF_ALLOC) != 0) | |
ede4eed4 | 2396 | { |
fd0198f0 ILT |
2397 | ((*_bfd_error_handler) |
2398 | ("%s: warning: allocated section `%s' not in segment", | |
2399 | bfd_get_filename (abfd), | |
2400 | (hdr->bfd_section == NULL | |
2401 | ? "*unknown*" | |
2402 | : hdr->bfd_section->name))); | |
cdb88e87 ILT |
2403 | if ((abfd->flags & D_PAGED) != 0) |
2404 | off += (hdr->sh_addr - off) % bed->maxpagesize; | |
2405 | else | |
2406 | off += (hdr->sh_addr - off) % hdr->sh_addralign; | |
5fe14a9f ILT |
2407 | off = _bfd_elf_assign_file_position_for_section (hdr, off, |
2408 | false); | |
ede4eed4 | 2409 | } |
fd0198f0 ILT |
2410 | else if (hdr->sh_type == SHT_REL |
2411 | || hdr->sh_type == SHT_RELA | |
2412 | || hdr == i_shdrpp[tdata->symtab_section] | |
2413 | || hdr == i_shdrpp[tdata->strtab_section]) | |
2414 | hdr->sh_offset = -1; | |
2415 | else | |
2416 | off = _bfd_elf_assign_file_position_for_section (hdr, off, true); | |
2417 | } | |
ede4eed4 KR |
2418 | } |
2419 | ||
2420 | /* Place the section headers. */ | |
2421 | off = align_file_position (off, bed->s->file_align); | |
2422 | i_ehdrp->e_shoff = off; | |
2423 | off += i_ehdrp->e_shnum * i_ehdrp->e_shentsize; | |
2424 | ||
2425 | elf_tdata (abfd)->next_file_pos = off; | |
2426 | ||
2427 | return true; | |
2428 | } | |
2429 | ||
ede4eed4 KR |
2430 | static boolean |
2431 | prep_headers (abfd) | |
2432 | bfd *abfd; | |
2433 | { | |
2434 | Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */ | |
2435 | Elf_Internal_Phdr *i_phdrp = 0; /* Program header table, internal form */ | |
2436 | Elf_Internal_Shdr **i_shdrp; /* Section header table, internal form */ | |
2437 | int count; | |
2438 | struct bfd_strtab_hash *shstrtab; | |
2439 | struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
2440 | ||
2441 | i_ehdrp = elf_elfheader (abfd); | |
2442 | i_shdrp = elf_elfsections (abfd); | |
2443 | ||
2444 | shstrtab = _bfd_elf_stringtab_init (); | |
2445 | if (shstrtab == NULL) | |
2446 | return false; | |
2447 | ||
2448 | elf_shstrtab (abfd) = shstrtab; | |
2449 | ||
2450 | i_ehdrp->e_ident[EI_MAG0] = ELFMAG0; | |
2451 | i_ehdrp->e_ident[EI_MAG1] = ELFMAG1; | |
2452 | i_ehdrp->e_ident[EI_MAG2] = ELFMAG2; | |
2453 | i_ehdrp->e_ident[EI_MAG3] = ELFMAG3; | |
2454 | ||
2455 | i_ehdrp->e_ident[EI_CLASS] = bed->s->elfclass; | |
2456 | i_ehdrp->e_ident[EI_DATA] = | |
86587dd4 | 2457 | bfd_big_endian (abfd) ? ELFDATA2MSB : ELFDATA2LSB; |
ede4eed4 KR |
2458 | i_ehdrp->e_ident[EI_VERSION] = bed->s->ev_current; |
2459 | ||
2460 | for (count = EI_PAD; count < EI_NIDENT; count++) | |
2461 | i_ehdrp->e_ident[count] = 0; | |
2462 | ||
2463 | if ((abfd->flags & DYNAMIC) != 0) | |
2464 | i_ehdrp->e_type = ET_DYN; | |
2465 | else if ((abfd->flags & EXEC_P) != 0) | |
2466 | i_ehdrp->e_type = ET_EXEC; | |
2467 | else | |
2468 | i_ehdrp->e_type = ET_REL; | |
2469 | ||
2470 | switch (bfd_get_arch (abfd)) | |
2471 | { | |
2472 | case bfd_arch_unknown: | |
2473 | i_ehdrp->e_machine = EM_NONE; | |
2474 | break; | |
2475 | case bfd_arch_sparc: | |
2476 | if (bed->s->arch_size == 64) | |
2477 | i_ehdrp->e_machine = EM_SPARC64; | |
2478 | else | |
2479 | i_ehdrp->e_machine = EM_SPARC; | |
2480 | break; | |
2481 | case bfd_arch_i386: | |
2482 | i_ehdrp->e_machine = EM_386; | |
2483 | break; | |
2484 | case bfd_arch_m68k: | |
2485 | i_ehdrp->e_machine = EM_68K; | |
2486 | break; | |
2487 | case bfd_arch_m88k: | |
2488 | i_ehdrp->e_machine = EM_88K; | |
2489 | break; | |
2490 | case bfd_arch_i860: | |
2491 | i_ehdrp->e_machine = EM_860; | |
2492 | break; | |
2493 | case bfd_arch_mips: /* MIPS Rxxxx */ | |
2494 | i_ehdrp->e_machine = EM_MIPS; /* only MIPS R3000 */ | |
2495 | break; | |
2496 | case bfd_arch_hppa: | |
2497 | i_ehdrp->e_machine = EM_PARISC; | |
2498 | break; | |
2499 | case bfd_arch_powerpc: | |
2500 | i_ehdrp->e_machine = EM_PPC; | |
2501 | break; | |
50bd50d4 MH |
2502 | case bfd_arch_alpha: |
2503 | i_ehdrp->e_machine = EM_ALPHA; | |
2504 | break; | |
f0c12b73 DE |
2505 | case bfd_arch_sh: |
2506 | i_ehdrp->e_machine = EM_SH; | |
2507 | break; | |
50bd50d4 MH |
2508 | /* start-sanitize-d10v */ |
2509 | case bfd_arch_d10v: | |
2510 | i_ehdrp->e_machine = EM_CYGNUS_D10V; | |
2511 | break; | |
2512 | /* end-sanitize-d10v */ | |
f0c12b73 DE |
2513 | /* start-sanitize-v850 */ |
2514 | case bfd_arch_v850: | |
2515 | i_ehdrp->e_machine = EM_CYGNUS_V850; | |
2516 | break; | |
2517 | /* end-sanitize-v850 */ | |
ede4eed4 KR |
2518 | /* start-sanitize-arc */ |
2519 | case bfd_arch_arc: | |
2520 | i_ehdrp->e_machine = EM_CYGNUS_ARC; | |
2521 | break; | |
2522 | /* end-sanitize-arc */ | |
f0c12b73 DE |
2523 | /* start-sanitize-m32r */ |
2524 | case bfd_arch_m32r: | |
2525 | i_ehdrp->e_machine = EM_CYGNUS_M32R; | |
2526 | break; | |
2527 | /* end-sanitize-m32r */ | |
efc2b064 JL |
2528 | case bfd_arch_mn10x00: |
2529 | i_ehdrp->e_machine = EM_CYGNUS_MN10x00; | |
2530 | break; | |
ede4eed4 KR |
2531 | /* also note that EM_M32, AT&T WE32100 is unknown to bfd */ |
2532 | default: | |
2533 | i_ehdrp->e_machine = EM_NONE; | |
2534 | } | |
2535 | i_ehdrp->e_version = bed->s->ev_current; | |
2536 | i_ehdrp->e_ehsize = bed->s->sizeof_ehdr; | |
2537 | ||
2538 | /* no program header, for now. */ | |
2539 | i_ehdrp->e_phoff = 0; | |
2540 | i_ehdrp->e_phentsize = 0; | |
2541 | i_ehdrp->e_phnum = 0; | |
2542 | ||
2543 | /* each bfd section is section header entry */ | |
2544 | i_ehdrp->e_entry = bfd_get_start_address (abfd); | |
2545 | i_ehdrp->e_shentsize = bed->s->sizeof_shdr; | |
2546 | ||
2547 | /* if we're building an executable, we'll need a program header table */ | |
2548 | if (abfd->flags & EXEC_P) | |
2549 | { | |
2550 | /* it all happens later */ | |
2551 | #if 0 | |
2552 | i_ehdrp->e_phentsize = sizeof (Elf_External_Phdr); | |
2553 | ||
2554 | /* elf_build_phdrs() returns a (NULL-terminated) array of | |
2555 | Elf_Internal_Phdrs */ | |
2556 | i_phdrp = elf_build_phdrs (abfd, i_ehdrp, i_shdrp, &i_ehdrp->e_phnum); | |
2557 | i_ehdrp->e_phoff = outbase; | |
2558 | outbase += i_ehdrp->e_phentsize * i_ehdrp->e_phnum; | |
2559 | #endif | |
2560 | } | |
2561 | else | |
2562 | { | |
2563 | i_ehdrp->e_phentsize = 0; | |
2564 | i_phdrp = 0; | |
2565 | i_ehdrp->e_phoff = 0; | |
2566 | } | |
2567 | ||
2568 | elf_tdata (abfd)->symtab_hdr.sh_name = | |
2569 | (unsigned int) _bfd_stringtab_add (shstrtab, ".symtab", true, false); | |
2570 | elf_tdata (abfd)->strtab_hdr.sh_name = | |
2571 | (unsigned int) _bfd_stringtab_add (shstrtab, ".strtab", true, false); | |
2572 | elf_tdata (abfd)->shstrtab_hdr.sh_name = | |
2573 | (unsigned int) _bfd_stringtab_add (shstrtab, ".shstrtab", true, false); | |
2574 | if (elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1 | |
2575 | || elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1 | |
2576 | || elf_tdata (abfd)->shstrtab_hdr.sh_name == (unsigned int) -1) | |
2577 | return false; | |
2578 | ||
2579 | return true; | |
2580 | } | |
2581 | ||
2582 | /* Assign file positions for all the reloc sections which are not part | |
2583 | of the loadable file image. */ | |
2584 | ||
2585 | void | |
2586 | _bfd_elf_assign_file_positions_for_relocs (abfd) | |
2587 | bfd *abfd; | |
2588 | { | |
2589 | file_ptr off; | |
2590 | unsigned int i; | |
2591 | Elf_Internal_Shdr **shdrpp; | |
2592 | ||
2593 | off = elf_tdata (abfd)->next_file_pos; | |
2594 | ||
2595 | for (i = 1, shdrpp = elf_elfsections (abfd) + 1; | |
2596 | i < elf_elfheader (abfd)->e_shnum; | |
2597 | i++, shdrpp++) | |
2598 | { | |
2599 | Elf_Internal_Shdr *shdrp; | |
2600 | ||
2601 | shdrp = *shdrpp; | |
2602 | if ((shdrp->sh_type == SHT_REL || shdrp->sh_type == SHT_RELA) | |
2603 | && shdrp->sh_offset == -1) | |
5fe14a9f | 2604 | off = _bfd_elf_assign_file_position_for_section (shdrp, off, true); |
ede4eed4 KR |
2605 | } |
2606 | ||
2607 | elf_tdata (abfd)->next_file_pos = off; | |
2608 | } | |
2609 | ||
2610 | boolean | |
2611 | _bfd_elf_write_object_contents (abfd) | |
2612 | bfd *abfd; | |
2613 | { | |
2614 | struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
2615 | Elf_Internal_Ehdr *i_ehdrp; | |
2616 | Elf_Internal_Shdr **i_shdrp; | |
2617 | boolean failed; | |
2618 | unsigned int count; | |
2619 | ||
2620 | if (! abfd->output_has_begun | |
2621 | && ! _bfd_elf_compute_section_file_positions (abfd, | |
2622 | (struct bfd_link_info *) NULL)) | |
2623 | return false; | |
2624 | ||
2625 | i_shdrp = elf_elfsections (abfd); | |
2626 | i_ehdrp = elf_elfheader (abfd); | |
2627 | ||
2628 | failed = false; | |
2629 | bfd_map_over_sections (abfd, bed->s->write_relocs, &failed); | |
2630 | if (failed) | |
2631 | return false; | |
2632 | _bfd_elf_assign_file_positions_for_relocs (abfd); | |
2633 | ||
2634 | /* After writing the headers, we need to write the sections too... */ | |
2635 | for (count = 1; count < i_ehdrp->e_shnum; count++) | |
2636 | { | |
2637 | if (bed->elf_backend_section_processing) | |
2638 | (*bed->elf_backend_section_processing) (abfd, i_shdrp[count]); | |
2639 | if (i_shdrp[count]->contents) | |
2640 | { | |
2641 | if (bfd_seek (abfd, i_shdrp[count]->sh_offset, SEEK_SET) != 0 | |
2642 | || (bfd_write (i_shdrp[count]->contents, i_shdrp[count]->sh_size, | |
2643 | 1, abfd) | |
2644 | != i_shdrp[count]->sh_size)) | |
2645 | return false; | |
2646 | } | |
2647 | } | |
2648 | ||
2649 | /* Write out the section header names. */ | |
2650 | if (bfd_seek (abfd, elf_tdata (abfd)->shstrtab_hdr.sh_offset, SEEK_SET) != 0 | |
2651 | || ! _bfd_stringtab_emit (abfd, elf_shstrtab (abfd))) | |
2652 | return false; | |
2653 | ||
2654 | if (bed->elf_backend_final_write_processing) | |
2655 | (*bed->elf_backend_final_write_processing) (abfd, | |
2656 | elf_tdata (abfd)->linker); | |
2657 | ||
2658 | return bed->s->write_shdrs_and_ehdr (abfd); | |
2659 | } | |
2660 | ||
2661 | /* given a section, search the header to find them... */ | |
2662 | int | |
2663 | _bfd_elf_section_from_bfd_section (abfd, asect) | |
2664 | bfd *abfd; | |
2665 | struct sec *asect; | |
2666 | { | |
2667 | struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
2668 | Elf_Internal_Shdr **i_shdrp = elf_elfsections (abfd); | |
2669 | int index; | |
2670 | Elf_Internal_Shdr *hdr; | |
2671 | int maxindex = elf_elfheader (abfd)->e_shnum; | |
2672 | ||
2673 | for (index = 0; index < maxindex; index++) | |
2674 | { | |
2675 | hdr = i_shdrp[index]; | |
2676 | if (hdr->bfd_section == asect) | |
2677 | return index; | |
2678 | } | |
2679 | ||
2680 | if (bed->elf_backend_section_from_bfd_section) | |
2681 | { | |
2682 | for (index = 0; index < maxindex; index++) | |
2683 | { | |
2684 | int retval; | |
2685 | ||
2686 | hdr = i_shdrp[index]; | |
2687 | retval = index; | |
2688 | if ((*bed->elf_backend_section_from_bfd_section) | |
2689 | (abfd, hdr, asect, &retval)) | |
2690 | return retval; | |
2691 | } | |
2692 | } | |
2693 | ||
2694 | if (bfd_is_abs_section (asect)) | |
2695 | return SHN_ABS; | |
2696 | if (bfd_is_com_section (asect)) | |
2697 | return SHN_COMMON; | |
2698 | if (bfd_is_und_section (asect)) | |
2699 | return SHN_UNDEF; | |
2700 | ||
2701 | return -1; | |
2702 | } | |
2703 | ||
cb84f028 ILT |
2704 | /* Given a BFD symbol, return the index in the ELF symbol table, or -1 |
2705 | on error. */ | |
2706 | ||
2707 | int | |
ede4eed4 KR |
2708 | _bfd_elf_symbol_from_bfd_symbol (abfd, asym_ptr_ptr) |
2709 | bfd *abfd; | |
7fc6a16a | 2710 | asymbol **asym_ptr_ptr; |
ede4eed4 | 2711 | { |
7fc6a16a | 2712 | asymbol *asym_ptr = *asym_ptr_ptr; |
ede4eed4 KR |
2713 | int idx; |
2714 | flagword flags = asym_ptr->flags; | |
2715 | ||
2716 | /* When gas creates relocations against local labels, it creates its | |
2717 | own symbol for the section, but does put the symbol into the | |
2718 | symbol chain, so udata is 0. When the linker is generating | |
2719 | relocatable output, this section symbol may be for one of the | |
2720 | input sections rather than the output section. */ | |
2721 | if (asym_ptr->udata.i == 0 | |
2722 | && (flags & BSF_SECTION_SYM) | |
2723 | && asym_ptr->section) | |
2724 | { | |
2725 | int indx; | |
2726 | ||
2727 | if (asym_ptr->section->output_section != NULL) | |
2728 | indx = asym_ptr->section->output_section->index; | |
2729 | else | |
2730 | indx = asym_ptr->section->index; | |
2731 | if (elf_section_syms (abfd)[indx]) | |
2732 | asym_ptr->udata.i = elf_section_syms (abfd)[indx]->udata.i; | |
2733 | } | |
2734 | ||
2735 | idx = asym_ptr->udata.i; | |
cb84f028 ILT |
2736 | |
2737 | if (idx == 0) | |
2738 | { | |
2739 | /* This case can occur when using --strip-symbol on a symbol | |
2740 | which is used in a relocation entry. */ | |
2741 | (*_bfd_error_handler) | |
2742 | ("%s: symbol `%s' required but not present", | |
2743 | bfd_get_filename (abfd), bfd_asymbol_name (asym_ptr)); | |
2744 | bfd_set_error (bfd_error_no_symbols); | |
2745 | return -1; | |
2746 | } | |
ede4eed4 KR |
2747 | |
2748 | #if DEBUG & 4 | |
2749 | { | |
2750 | fprintf (stderr, | |
2751 | "elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx%s\n", | |
cb84f028 ILT |
2752 | (long) asym_ptr, asym_ptr->name, idx, flags, |
2753 | elf_symbol_flags (flags)); | |
ede4eed4 KR |
2754 | fflush (stderr); |
2755 | } | |
2756 | #endif | |
2757 | ||
2758 | return idx; | |
2759 | } | |
2760 | ||
3dbf33ee ILT |
2761 | /* Copy private BFD data. This copies any program header information. */ |
2762 | ||
2763 | static boolean | |
2764 | copy_private_bfd_data (ibfd, obfd) | |
2765 | bfd *ibfd; | |
2766 | bfd *obfd; | |
2767 | { | |
6933148a | 2768 | Elf_Internal_Ehdr *iehdr; |
3dbf33ee ILT |
2769 | struct elf_segment_map *mfirst; |
2770 | struct elf_segment_map **pm; | |
2771 | Elf_Internal_Phdr *p; | |
2772 | unsigned int i, c; | |
2773 | ||
2774 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour | |
2775 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) | |
2776 | return true; | |
2777 | ||
2778 | if (elf_tdata (ibfd)->phdr == NULL) | |
2779 | return true; | |
2780 | ||
6933148a ILT |
2781 | iehdr = elf_elfheader (ibfd); |
2782 | ||
3dbf33ee ILT |
2783 | mfirst = NULL; |
2784 | pm = &mfirst; | |
2785 | ||
2786 | c = elf_elfheader (ibfd)->e_phnum; | |
2787 | for (i = 0, p = elf_tdata (ibfd)->phdr; i < c; i++, p++) | |
2788 | { | |
3dbf33ee | 2789 | unsigned int csecs; |
6933148a ILT |
2790 | asection *s; |
2791 | struct elf_segment_map *m; | |
2792 | unsigned int isec; | |
3dbf33ee ILT |
2793 | |
2794 | csecs = 0; | |
3dbf33ee | 2795 | |
6933148a ILT |
2796 | /* The complicated case when p_vaddr is 0 is to handle the |
2797 | Solaris linker, which generates a PT_INTERP section with | |
2798 | p_vaddr and p_memsz set to 0. */ | |
2799 | for (s = ibfd->sections; s != NULL; s = s->next) | |
2800 | if (((s->vma >= p->p_vaddr | |
2801 | && (s->vma + s->_raw_size <= p->p_vaddr + p->p_memsz | |
2802 | || s->vma + s->_raw_size <= p->p_vaddr + p->p_filesz)) | |
2803 | || (p->p_vaddr == 0 | |
2804 | && p->p_filesz > 0 | |
2805 | && (s->flags & SEC_HAS_CONTENTS) != 0 | |
2806 | && (bfd_vma) s->filepos >= p->p_offset | |
2807 | && ((bfd_vma) s->filepos + s->_raw_size | |
2808 | <= p->p_offset + p->p_filesz))) | |
86587dd4 | 2809 | && (s->flags & SEC_ALLOC) != 0 |
6933148a ILT |
2810 | && s->output_section != NULL) |
2811 | ++csecs; | |
3dbf33ee ILT |
2812 | |
2813 | m = ((struct elf_segment_map *) | |
2814 | bfd_alloc (obfd, | |
2815 | (sizeof (struct elf_segment_map) | |
2816 | + (csecs - 1) * sizeof (asection *)))); | |
2817 | if (m == NULL) | |
a9713b91 | 2818 | return false; |
3dbf33ee ILT |
2819 | |
2820 | m->next = NULL; | |
2821 | m->p_type = p->p_type; | |
2822 | m->p_flags = p->p_flags; | |
2823 | m->p_flags_valid = 1; | |
2824 | m->p_paddr = p->p_paddr; | |
2825 | m->p_paddr_valid = 1; | |
2826 | ||
6933148a ILT |
2827 | m->includes_filehdr = (p->p_offset == 0 |
2828 | && p->p_filesz >= iehdr->e_ehsize); | |
2829 | ||
2830 | m->includes_phdrs = (p->p_offset <= (bfd_vma) iehdr->e_phoff | |
2831 | && (p->p_offset + p->p_filesz | |
2832 | >= ((bfd_vma) iehdr->e_phoff | |
2833 | + iehdr->e_phnum * iehdr->e_phentsize))); | |
3dbf33ee | 2834 | |
6933148a ILT |
2835 | isec = 0; |
2836 | for (s = ibfd->sections; s != NULL; s = s->next) | |
2837 | { | |
2838 | if (((s->vma >= p->p_vaddr | |
2839 | && (s->vma + s->_raw_size <= p->p_vaddr + p->p_memsz | |
2840 | || s->vma + s->_raw_size <= p->p_vaddr + p->p_filesz)) | |
2841 | || (p->p_vaddr == 0 | |
2842 | && p->p_filesz > 0 | |
2843 | && (s->flags & SEC_HAS_CONTENTS) != 0 | |
2844 | && (bfd_vma) s->filepos >= p->p_offset | |
2845 | && ((bfd_vma) s->filepos + s->_raw_size | |
2846 | <= p->p_offset + p->p_filesz))) | |
86587dd4 | 2847 | && (s->flags & SEC_ALLOC) != 0 |
6933148a | 2848 | && s->output_section != NULL) |
3dbf33ee | 2849 | { |
6933148a ILT |
2850 | m->sections[isec] = s->output_section; |
2851 | ++isec; | |
3dbf33ee | 2852 | } |
3dbf33ee | 2853 | } |
6933148a | 2854 | BFD_ASSERT (isec == csecs); |
6933148a | 2855 | m->count = csecs; |
3dbf33ee ILT |
2856 | |
2857 | *pm = m; | |
2858 | pm = &m->next; | |
2859 | } | |
2860 | ||
2861 | elf_tdata (obfd)->segment_map = mfirst; | |
2862 | ||
2863 | return true; | |
2864 | } | |
2865 | ||
fd0198f0 ILT |
2866 | /* Copy private section information. This copies over the entsize |
2867 | field, and sometimes the info field. */ | |
2868 | ||
2869 | boolean | |
2870 | _bfd_elf_copy_private_section_data (ibfd, isec, obfd, osec) | |
2871 | bfd *ibfd; | |
2872 | asection *isec; | |
2873 | bfd *obfd; | |
2874 | asection *osec; | |
2875 | { | |
2876 | Elf_Internal_Shdr *ihdr, *ohdr; | |
2877 | ||
2878 | if (ibfd->xvec->flavour != bfd_target_elf_flavour | |
2879 | || obfd->xvec->flavour != bfd_target_elf_flavour) | |
2880 | return true; | |
2881 | ||
3dbf33ee ILT |
2882 | /* Copy over private BFD data if it has not already been copied. |
2883 | This must be done here, rather than in the copy_private_bfd_data | |
2884 | entry point, because the latter is called after the section | |
2885 | contents have been set, which means that the program headers have | |
2886 | already been worked out. */ | |
2887 | if (elf_tdata (obfd)->segment_map == NULL | |
2888 | && elf_tdata (ibfd)->phdr != NULL) | |
2889 | { | |
2890 | asection *s; | |
2891 | ||
2892 | /* Only set up the segments when all the sections have been set | |
2893 | up. */ | |
2894 | for (s = ibfd->sections; s != NULL; s = s->next) | |
2895 | if (s->output_section == NULL) | |
2896 | break; | |
2897 | if (s == NULL) | |
2898 | { | |
2899 | if (! copy_private_bfd_data (ibfd, obfd)) | |
2900 | return false; | |
2901 | } | |
2902 | } | |
2903 | ||
fd0198f0 ILT |
2904 | ihdr = &elf_section_data (isec)->this_hdr; |
2905 | ohdr = &elf_section_data (osec)->this_hdr; | |
2906 | ||
2907 | ohdr->sh_entsize = ihdr->sh_entsize; | |
2908 | ||
2909 | if (ihdr->sh_type == SHT_SYMTAB | |
2910 | || ihdr->sh_type == SHT_DYNSYM) | |
2911 | ohdr->sh_info = ihdr->sh_info; | |
2912 | ||
2913 | return true; | |
2914 | } | |
2915 | ||
2916 | /* Copy private symbol information. If this symbol is in a section | |
2917 | which we did not map into a BFD section, try to map the section | |
2918 | index correctly. We use special macro definitions for the mapped | |
2919 | section indices; these definitions are interpreted by the | |
2920 | swap_out_syms function. */ | |
2921 | ||
2922 | #define MAP_ONESYMTAB (SHN_LORESERVE - 1) | |
2923 | #define MAP_DYNSYMTAB (SHN_LORESERVE - 2) | |
2924 | #define MAP_STRTAB (SHN_LORESERVE - 3) | |
2925 | #define MAP_SHSTRTAB (SHN_LORESERVE - 4) | |
2926 | ||
2927 | boolean | |
2928 | _bfd_elf_copy_private_symbol_data (ibfd, isymarg, obfd, osymarg) | |
2929 | bfd *ibfd; | |
2930 | asymbol *isymarg; | |
2931 | bfd *obfd; | |
2932 | asymbol *osymarg; | |
2933 | { | |
2934 | elf_symbol_type *isym, *osym; | |
2935 | ||
efc2b064 JL |
2936 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour |
2937 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) | |
2938 | return true; | |
2939 | ||
fd0198f0 ILT |
2940 | isym = elf_symbol_from (ibfd, isymarg); |
2941 | osym = elf_symbol_from (obfd, osymarg); | |
2942 | ||
2943 | if (isym != NULL | |
2944 | && osym != NULL | |
2945 | && bfd_is_abs_section (isym->symbol.section)) | |
2946 | { | |
2947 | unsigned int shndx; | |
2948 | ||
2949 | shndx = isym->internal_elf_sym.st_shndx; | |
2950 | if (shndx == elf_onesymtab (ibfd)) | |
2951 | shndx = MAP_ONESYMTAB; | |
2952 | else if (shndx == elf_dynsymtab (ibfd)) | |
2953 | shndx = MAP_DYNSYMTAB; | |
2954 | else if (shndx == elf_tdata (ibfd)->strtab_section) | |
2955 | shndx = MAP_STRTAB; | |
2956 | else if (shndx == elf_tdata (ibfd)->shstrtab_section) | |
2957 | shndx = MAP_SHSTRTAB; | |
2958 | osym->internal_elf_sym.st_shndx = shndx; | |
2959 | } | |
2960 | ||
2961 | return true; | |
2962 | } | |
2963 | ||
2964 | /* Swap out the symbols. */ | |
2965 | ||
ede4eed4 KR |
2966 | static boolean |
2967 | swap_out_syms (abfd, sttp) | |
2968 | bfd *abfd; | |
2969 | struct bfd_strtab_hash **sttp; | |
2970 | { | |
2971 | struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
2972 | ||
2973 | if (!elf_map_symbols (abfd)) | |
2974 | return false; | |
2975 | ||
2976 | /* Dump out the symtabs. */ | |
2977 | { | |
2978 | int symcount = bfd_get_symcount (abfd); | |
2979 | asymbol **syms = bfd_get_outsymbols (abfd); | |
2980 | struct bfd_strtab_hash *stt; | |
2981 | Elf_Internal_Shdr *symtab_hdr; | |
2982 | Elf_Internal_Shdr *symstrtab_hdr; | |
2983 | char *outbound_syms; | |
2984 | int idx; | |
2985 | ||
2986 | stt = _bfd_elf_stringtab_init (); | |
2987 | if (stt == NULL) | |
2988 | return false; | |
2989 | ||
2990 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
2991 | symtab_hdr->sh_type = SHT_SYMTAB; | |
2992 | symtab_hdr->sh_entsize = bed->s->sizeof_sym; | |
2993 | symtab_hdr->sh_size = symtab_hdr->sh_entsize * (symcount + 1); | |
2994 | symtab_hdr->sh_info = elf_num_locals (abfd) + 1; | |
2995 | symtab_hdr->sh_addralign = bed->s->file_align; | |
2996 | ||
2997 | symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr; | |
2998 | symstrtab_hdr->sh_type = SHT_STRTAB; | |
2999 | ||
3000 | outbound_syms = bfd_alloc (abfd, | |
3001 | (1 + symcount) * bed->s->sizeof_sym); | |
3002 | if (outbound_syms == NULL) | |
a9713b91 | 3003 | return false; |
ede4eed4 KR |
3004 | symtab_hdr->contents = (PTR) outbound_syms; |
3005 | ||
3006 | /* now generate the data (for "contents") */ | |
3007 | { | |
3008 | /* Fill in zeroth symbol and swap it out. */ | |
3009 | Elf_Internal_Sym sym; | |
3010 | sym.st_name = 0; | |
3011 | sym.st_value = 0; | |
3012 | sym.st_size = 0; | |
3013 | sym.st_info = 0; | |
3014 | sym.st_other = 0; | |
3015 | sym.st_shndx = SHN_UNDEF; | |
cf9fb9f2 | 3016 | bed->s->swap_symbol_out (abfd, &sym, (PTR) outbound_syms); |
ede4eed4 KR |
3017 | outbound_syms += bed->s->sizeof_sym; |
3018 | } | |
3019 | for (idx = 0; idx < symcount; idx++) | |
3020 | { | |
3021 | Elf_Internal_Sym sym; | |
3022 | bfd_vma value = syms[idx]->value; | |
3023 | elf_symbol_type *type_ptr; | |
3024 | flagword flags = syms[idx]->flags; | |
052b35d2 | 3025 | int type; |
ede4eed4 KR |
3026 | |
3027 | if (flags & BSF_SECTION_SYM) | |
3028 | /* Section symbols have no names. */ | |
3029 | sym.st_name = 0; | |
3030 | else | |
3031 | { | |
3032 | sym.st_name = (unsigned long) _bfd_stringtab_add (stt, | |
3033 | syms[idx]->name, | |
3034 | true, false); | |
3035 | if (sym.st_name == (unsigned long) -1) | |
3036 | return false; | |
3037 | } | |
3038 | ||
3039 | type_ptr = elf_symbol_from (abfd, syms[idx]); | |
3040 | ||
3041 | if (bfd_is_com_section (syms[idx]->section)) | |
3042 | { | |
3043 | /* ELF common symbols put the alignment into the `value' field, | |
3044 | and the size into the `size' field. This is backwards from | |
3045 | how BFD handles it, so reverse it here. */ | |
3046 | sym.st_size = value; | |
3047 | if (type_ptr == NULL | |
3048 | || type_ptr->internal_elf_sym.st_value == 0) | |
3049 | sym.st_value = value >= 16 ? 16 : (1 << bfd_log2 (value)); | |
3050 | else | |
3051 | sym.st_value = type_ptr->internal_elf_sym.st_value; | |
3052 | sym.st_shndx = _bfd_elf_section_from_bfd_section (abfd, | |
3053 | syms[idx]->section); | |
3054 | } | |
3055 | else | |
3056 | { | |
3057 | asection *sec = syms[idx]->section; | |
3058 | int shndx; | |
3059 | ||
3060 | if (sec->output_section) | |
3061 | { | |
3062 | value += sec->output_offset; | |
3063 | sec = sec->output_section; | |
3064 | } | |
3065 | value += sec->vma; | |
3066 | sym.st_value = value; | |
3067 | sym.st_size = type_ptr ? type_ptr->internal_elf_sym.st_size : 0; | |
fd0198f0 ILT |
3068 | |
3069 | if (bfd_is_abs_section (sec) | |
3070 | && type_ptr != NULL | |
3071 | && type_ptr->internal_elf_sym.st_shndx != 0) | |
ede4eed4 | 3072 | { |
fd0198f0 ILT |
3073 | /* This symbol is in a real ELF section which we did |
3074 | not create as a BFD section. Undo the mapping done | |
3075 | by copy_private_symbol_data. */ | |
3076 | shndx = type_ptr->internal_elf_sym.st_shndx; | |
3077 | switch (shndx) | |
3078 | { | |
3079 | case MAP_ONESYMTAB: | |
3080 | shndx = elf_onesymtab (abfd); | |
3081 | break; | |
3082 | case MAP_DYNSYMTAB: | |
3083 | shndx = elf_dynsymtab (abfd); | |
3084 | break; | |
3085 | case MAP_STRTAB: | |
3086 | shndx = elf_tdata (abfd)->strtab_section; | |
3087 | break; | |
3088 | case MAP_SHSTRTAB: | |
3089 | shndx = elf_tdata (abfd)->shstrtab_section; | |
3090 | break; | |
3091 | default: | |
3092 | break; | |
3093 | } | |
3094 | } | |
3095 | else | |
3096 | { | |
3097 | shndx = _bfd_elf_section_from_bfd_section (abfd, sec); | |
3098 | ||
3099 | if (shndx == -1) | |
3100 | { | |
3101 | asection *sec2; | |
3102 | ||
3103 | /* Writing this would be a hell of a lot easier if | |
3104 | we had some decent documentation on bfd, and | |
3105 | knew what to expect of the library, and what to | |
3106 | demand of applications. For example, it | |
3107 | appears that `objcopy' might not set the | |
3108 | section of a symbol to be a section that is | |
3109 | actually in the output file. */ | |
3110 | sec2 = bfd_get_section_by_name (abfd, sec->name); | |
3111 | BFD_ASSERT (sec2 != 0); | |
3112 | shndx = _bfd_elf_section_from_bfd_section (abfd, sec2); | |
3113 | BFD_ASSERT (shndx != -1); | |
3114 | } | |
ede4eed4 | 3115 | } |
fd0198f0 ILT |
3116 | |
3117 | sym.st_shndx = shndx; | |
ede4eed4 KR |
3118 | } |
3119 | ||
052b35d2 ILT |
3120 | if ((flags & BSF_FUNCTION) != 0) |
3121 | type = STT_FUNC; | |
3122 | else if ((flags & BSF_OBJECT) != 0) | |
3123 | type = STT_OBJECT; | |
3124 | else | |
3125 | type = STT_NOTYPE; | |
3126 | ||
ede4eed4 | 3127 | if (bfd_is_com_section (syms[idx]->section)) |
052b35d2 | 3128 | sym.st_info = ELF_ST_INFO (STB_GLOBAL, type); |
ede4eed4 KR |
3129 | else if (bfd_is_und_section (syms[idx]->section)) |
3130 | sym.st_info = ELF_ST_INFO (((flags & BSF_WEAK) | |
3131 | ? STB_WEAK | |
3132 | : STB_GLOBAL), | |
052b35d2 | 3133 | type); |
ede4eed4 KR |
3134 | else if (flags & BSF_SECTION_SYM) |
3135 | sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION); | |
3136 | else if (flags & BSF_FILE) | |
3137 | sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE); | |
3138 | else | |
3139 | { | |
3140 | int bind = STB_LOCAL; | |
ede4eed4 KR |
3141 | |
3142 | if (flags & BSF_LOCAL) | |
3143 | bind = STB_LOCAL; | |
3144 | else if (flags & BSF_WEAK) | |
3145 | bind = STB_WEAK; | |
3146 | else if (flags & BSF_GLOBAL) | |
3147 | bind = STB_GLOBAL; | |
3148 | ||
ede4eed4 KR |
3149 | sym.st_info = ELF_ST_INFO (bind, type); |
3150 | } | |
3151 | ||
3152 | sym.st_other = 0; | |
cf9fb9f2 | 3153 | bed->s->swap_symbol_out (abfd, &sym, (PTR) outbound_syms); |
ede4eed4 KR |
3154 | outbound_syms += bed->s->sizeof_sym; |
3155 | } | |
3156 | ||
3157 | *sttp = stt; | |
3158 | symstrtab_hdr->sh_size = _bfd_stringtab_size (stt); | |
3159 | symstrtab_hdr->sh_type = SHT_STRTAB; | |
3160 | ||
3161 | symstrtab_hdr->sh_flags = 0; | |
3162 | symstrtab_hdr->sh_addr = 0; | |
3163 | symstrtab_hdr->sh_entsize = 0; | |
3164 | symstrtab_hdr->sh_link = 0; | |
3165 | symstrtab_hdr->sh_info = 0; | |
3166 | symstrtab_hdr->sh_addralign = 1; | |
3167 | } | |
3168 | ||
3169 | return true; | |
3170 | } | |
3171 | ||
3172 | /* Return the number of bytes required to hold the symtab vector. | |
3173 | ||
3174 | Note that we base it on the count plus 1, since we will null terminate | |
3175 | the vector allocated based on this size. However, the ELF symbol table | |
3176 | always has a dummy entry as symbol #0, so it ends up even. */ | |
3177 | ||
3178 | long | |
3179 | _bfd_elf_get_symtab_upper_bound (abfd) | |
3180 | bfd *abfd; | |
3181 | { | |
3182 | long symcount; | |
3183 | long symtab_size; | |
3184 | Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->symtab_hdr; | |
3185 | ||
3186 | symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym; | |
3187 | symtab_size = (symcount - 1 + 1) * (sizeof (asymbol *)); | |
3188 | ||
3189 | return symtab_size; | |
3190 | } | |
3191 | ||
3192 | long | |
3193 | _bfd_elf_get_dynamic_symtab_upper_bound (abfd) | |
3194 | bfd *abfd; | |
3195 | { | |
3196 | long symcount; | |
3197 | long symtab_size; | |
3198 | Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->dynsymtab_hdr; | |
3199 | ||
3200 | if (elf_dynsymtab (abfd) == 0) | |
3201 | { | |
3202 | bfd_set_error (bfd_error_invalid_operation); | |
3203 | return -1; | |
3204 | } | |
3205 | ||
3206 | symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym; | |
3207 | symtab_size = (symcount - 1 + 1) * (sizeof (asymbol *)); | |
3208 | ||
3209 | return symtab_size; | |
3210 | } | |
3211 | ||
3212 | long | |
3213 | _bfd_elf_get_reloc_upper_bound (abfd, asect) | |
3214 | bfd *abfd; | |
3215 | sec_ptr asect; | |
3216 | { | |
3217 | return (asect->reloc_count + 1) * sizeof (arelent *); | |
3218 | } | |
3219 | ||
3220 | /* Canonicalize the relocs. */ | |
3221 | ||
3222 | long | |
3223 | _bfd_elf_canonicalize_reloc (abfd, section, relptr, symbols) | |
3224 | bfd *abfd; | |
3225 | sec_ptr section; | |
3226 | arelent **relptr; | |
3227 | asymbol **symbols; | |
3228 | { | |
3229 | arelent *tblptr; | |
3230 | unsigned int i; | |
3231 | ||
3232 | if (! get_elf_backend_data (abfd)->s->slurp_reloc_table (abfd, section, symbols)) | |
3233 | return -1; | |
3234 | ||
3235 | tblptr = section->relocation; | |
3236 | for (i = 0; i < section->reloc_count; i++) | |
3237 | *relptr++ = tblptr++; | |
3238 | ||
3239 | *relptr = NULL; | |
3240 | ||
3241 | return section->reloc_count; | |
3242 | } | |
3243 | ||
3244 | long | |
3245 | _bfd_elf_get_symtab (abfd, alocation) | |
3246 | bfd *abfd; | |
3247 | asymbol **alocation; | |
3248 | { | |
3249 | long symcount = get_elf_backend_data (abfd)->s->slurp_symbol_table (abfd, alocation, false); | |
3250 | ||
3251 | if (symcount >= 0) | |
3252 | bfd_get_symcount (abfd) = symcount; | |
3253 | return symcount; | |
3254 | } | |
3255 | ||
3256 | long | |
3257 | _bfd_elf_canonicalize_dynamic_symtab (abfd, alocation) | |
3258 | bfd *abfd; | |
3259 | asymbol **alocation; | |
3260 | { | |
3261 | return get_elf_backend_data (abfd)->s->slurp_symbol_table (abfd, alocation, true); | |
3262 | } | |
3263 | ||
3264 | asymbol * | |
3265 | _bfd_elf_make_empty_symbol (abfd) | |
3266 | bfd *abfd; | |
3267 | { | |
3268 | elf_symbol_type *newsym; | |
3269 | ||
3270 | newsym = (elf_symbol_type *) bfd_zalloc (abfd, sizeof (elf_symbol_type)); | |
3271 | if (!newsym) | |
a9713b91 | 3272 | return NULL; |
ede4eed4 KR |
3273 | else |
3274 | { | |
3275 | newsym->symbol.the_bfd = abfd; | |
3276 | return &newsym->symbol; | |
3277 | } | |
3278 | } | |
3279 | ||
3280 | void | |
3281 | _bfd_elf_get_symbol_info (ignore_abfd, symbol, ret) | |
3282 | bfd *ignore_abfd; | |
3283 | asymbol *symbol; | |
3284 | symbol_info *ret; | |
3285 | { | |
3286 | bfd_symbol_info (symbol, ret); | |
3287 | } | |
3288 | ||
3289 | alent * | |
3290 | _bfd_elf_get_lineno (ignore_abfd, symbol) | |
3291 | bfd *ignore_abfd; | |
3292 | asymbol *symbol; | |
3293 | { | |
8cd2f4fe | 3294 | abort (); |
ede4eed4 KR |
3295 | return NULL; |
3296 | } | |
3297 | ||
3298 | boolean | |
3299 | _bfd_elf_set_arch_mach (abfd, arch, machine) | |
3300 | bfd *abfd; | |
3301 | enum bfd_architecture arch; | |
3302 | unsigned long machine; | |
3303 | { | |
3304 | /* If this isn't the right architecture for this backend, and this | |
3305 | isn't the generic backend, fail. */ | |
3306 | if (arch != get_elf_backend_data (abfd)->arch | |
3307 | && arch != bfd_arch_unknown | |
3308 | && get_elf_backend_data (abfd)->arch != bfd_arch_unknown) | |
3309 | return false; | |
3310 | ||
3311 | return bfd_default_set_arch_mach (abfd, arch, machine); | |
3312 | } | |
3313 | ||
6f904fce ILT |
3314 | /* Find the nearest line to a particular section and offset, for error |
3315 | reporting. */ | |
3316 | ||
ede4eed4 KR |
3317 | boolean |
3318 | _bfd_elf_find_nearest_line (abfd, | |
6f904fce ILT |
3319 | section, |
3320 | symbols, | |
3321 | offset, | |
3322 | filename_ptr, | |
3323 | functionname_ptr, | |
3324 | line_ptr) | |
ede4eed4 KR |
3325 | bfd *abfd; |
3326 | asection *section; | |
3327 | asymbol **symbols; | |
3328 | bfd_vma offset; | |
3329 | CONST char **filename_ptr; | |
3330 | CONST char **functionname_ptr; | |
3331 | unsigned int *line_ptr; | |
3332 | { | |
86aac8ea | 3333 | boolean found; |
6f904fce ILT |
3334 | const char *filename; |
3335 | asymbol *func; | |
86aac8ea | 3336 | bfd_vma low_func; |
6f904fce ILT |
3337 | asymbol **p; |
3338 | ||
86aac8ea ILT |
3339 | if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset, |
3340 | &found, filename_ptr, | |
3341 | functionname_ptr, line_ptr, | |
3342 | &elf_tdata (abfd)->line_info)) | |
3343 | return false; | |
3344 | if (found) | |
3345 | return true; | |
3346 | ||
6f904fce ILT |
3347 | if (symbols == NULL) |
3348 | return false; | |
3349 | ||
3350 | filename = NULL; | |
3351 | func = NULL; | |
86aac8ea | 3352 | low_func = 0; |
6f904fce ILT |
3353 | |
3354 | for (p = symbols; *p != NULL; p++) | |
3355 | { | |
3356 | elf_symbol_type *q; | |
3357 | ||
3358 | q = (elf_symbol_type *) *p; | |
3359 | ||
3360 | if (bfd_get_section (&q->symbol) != section) | |
3361 | continue; | |
3362 | ||
3363 | switch (ELF_ST_TYPE (q->internal_elf_sym.st_info)) | |
3364 | { | |
3365 | default: | |
3366 | break; | |
3367 | case STT_FILE: | |
3368 | filename = bfd_asymbol_name (&q->symbol); | |
3369 | break; | |
3370 | case STT_FUNC: | |
86aac8ea ILT |
3371 | if (q->symbol.section == section |
3372 | && q->symbol.value >= low_func | |
3373 | && q->symbol.value <= offset) | |
3374 | { | |
3375 | func = (asymbol *) q; | |
3376 | low_func = q->symbol.value; | |
3377 | } | |
6f904fce ILT |
3378 | break; |
3379 | } | |
3380 | } | |
3381 | ||
3382 | if (func == NULL) | |
3383 | return false; | |
3384 | ||
3385 | *filename_ptr = filename; | |
3386 | *functionname_ptr = bfd_asymbol_name (func); | |
3387 | *line_ptr = 0; | |
3388 | return true; | |
ede4eed4 KR |
3389 | } |
3390 | ||
3391 | int | |
3392 | _bfd_elf_sizeof_headers (abfd, reloc) | |
3393 | bfd *abfd; | |
3394 | boolean reloc; | |
3395 | { | |
3396 | int ret; | |
3397 | ||
3398 | ret = get_elf_backend_data (abfd)->s->sizeof_ehdr; | |
3399 | if (! reloc) | |
fd0198f0 | 3400 | ret += get_program_header_size (abfd); |
ede4eed4 KR |
3401 | return ret; |
3402 | } | |
3403 | ||
3404 | boolean | |
3405 | _bfd_elf_set_section_contents (abfd, section, location, offset, count) | |
3406 | bfd *abfd; | |
3407 | sec_ptr section; | |
3408 | PTR location; | |
3409 | file_ptr offset; | |
3410 | bfd_size_type count; | |
3411 | { | |
3412 | Elf_Internal_Shdr *hdr; | |
3413 | ||
3414 | if (! abfd->output_has_begun | |
3415 | && ! _bfd_elf_compute_section_file_positions (abfd, | |
3416 | (struct bfd_link_info *) NULL)) | |
3417 | return false; | |
3418 | ||
3419 | hdr = &elf_section_data (section)->this_hdr; | |
3420 | ||
3421 | if (bfd_seek (abfd, hdr->sh_offset + offset, SEEK_SET) == -1) | |
3422 | return false; | |
3423 | if (bfd_write (location, 1, count, abfd) != count) | |
3424 | return false; | |
3425 | ||
3426 | return true; | |
3427 | } | |
3428 | ||
3429 | void | |
3430 | _bfd_elf_no_info_to_howto (abfd, cache_ptr, dst) | |
3431 | bfd *abfd; | |
3432 | arelent *cache_ptr; | |
3433 | Elf_Internal_Rela *dst; | |
3434 | { | |
8cd2f4fe | 3435 | abort (); |
ede4eed4 KR |
3436 | } |
3437 | ||
3438 | #if 0 | |
3439 | void | |
3440 | _bfd_elf_no_info_to_howto_rel (abfd, cache_ptr, dst) | |
3441 | bfd *abfd; | |
3442 | arelent *cache_ptr; | |
3443 | Elf_Internal_Rel *dst; | |
3444 | { | |
8cd2f4fe | 3445 | abort (); |
ede4eed4 KR |
3446 | } |
3447 | #endif | |
7fc6a16a ILT |
3448 | |
3449 | /* Try to convert a non-ELF reloc into an ELF one. */ | |
3450 | ||
3451 | boolean | |
3452 | _bfd_elf_validate_reloc (abfd, areloc) | |
3453 | bfd *abfd; | |
3454 | arelent *areloc; | |
3455 | { | |
3456 | /* Check whether we really have an ELF howto. */ | |
3457 | ||
3458 | if ((*areloc->sym_ptr_ptr)->the_bfd->xvec != abfd->xvec) | |
3459 | { | |
3460 | bfd_reloc_code_real_type code; | |
3461 | reloc_howto_type *howto; | |
3462 | ||
3463 | /* Alien reloc: Try to determine its type to replace it with an | |
3464 | equivalent ELF reloc. */ | |
3465 | ||
3466 | if (areloc->howto->pc_relative) | |
3467 | { | |
3468 | switch (areloc->howto->bitsize) | |
3469 | { | |
3470 | case 8: | |
3471 | code = BFD_RELOC_8_PCREL; | |
3472 | break; | |
3473 | case 12: | |
3474 | code = BFD_RELOC_12_PCREL; | |
3475 | break; | |
3476 | case 16: | |
3477 | code = BFD_RELOC_16_PCREL; | |
3478 | break; | |
3479 | case 24: | |
3480 | code = BFD_RELOC_24_PCREL; | |
3481 | break; | |
3482 | case 32: | |
3483 | code = BFD_RELOC_32_PCREL; | |
3484 | break; | |
3485 | case 64: | |
3486 | code = BFD_RELOC_64_PCREL; | |
3487 | break; | |
3488 | default: | |
3489 | goto fail; | |
3490 | } | |
3491 | ||
3492 | howto = bfd_reloc_type_lookup (abfd, code); | |
3493 | ||
3494 | if (areloc->howto->pcrel_offset != howto->pcrel_offset) | |
3495 | { | |
3496 | if (howto->pcrel_offset) | |
3497 | areloc->addend += areloc->address; | |
3498 | else | |
3499 | areloc->addend -= areloc->address; /* addend is unsigned!! */ | |
3500 | } | |
3501 | } | |
3502 | else | |
3503 | { | |
3504 | switch (areloc->howto->bitsize) | |
3505 | { | |
3506 | case 8: | |
3507 | code = BFD_RELOC_8; | |
3508 | break; | |
3509 | case 14: | |
3510 | code = BFD_RELOC_14; | |
3511 | break; | |
3512 | case 16: | |
3513 | code = BFD_RELOC_16; | |
3514 | break; | |
3515 | case 26: | |
3516 | code = BFD_RELOC_26; | |
3517 | break; | |
3518 | case 32: | |
3519 | code = BFD_RELOC_32; | |
3520 | break; | |
3521 | case 64: | |
3522 | code = BFD_RELOC_64; | |
3523 | break; | |
3524 | default: | |
3525 | goto fail; | |
3526 | } | |
3527 | ||
3528 | howto = bfd_reloc_type_lookup (abfd, code); | |
3529 | } | |
3530 | ||
3531 | if (howto) | |
3532 | areloc->howto = howto; | |
3533 | else | |
3534 | goto fail; | |
3535 | } | |
3536 | ||
3537 | return true; | |
3538 | ||
3539 | fail: | |
3540 | (*_bfd_error_handler) | |
3541 | ("%s: unsupported relocation type %s", | |
3542 | bfd_get_filename (abfd), areloc->howto->name); | |
3543 | bfd_set_error (bfd_error_bad_value); | |
3544 | return false; | |
3545 | } |