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244ffee7 JK |
1 | /* ELF executable support for BFD. |
2 | Copyright 1991, 1992, 1993 Free Software Foundation, Inc. | |
3 | ||
4 | Written by Fred Fish @ Cygnus Support, from information published | |
5 | in "UNIX System V Release 4, Programmers Guide: ANSI C and | |
6 | Programming Support Tools". Sufficient support for gdb. | |
7 | ||
8 | Rewritten by Mark Eichin @ Cygnus Support, from information | |
9 | published in "System V Application Binary Interface", chapters 4 | |
10 | and 5, as well as the various "Processor Supplement" documents | |
11 | derived from it. Added support for assembler and other object file | |
12 | utilities. Further work done by Ken Raeburn (Cygnus Support), Michael | |
13 | Meissner (Open Software Foundation), and Peter Hoogenboom (University | |
14 | of Utah) to finish and extend this. | |
15 | ||
16 | This file is part of BFD, the Binary File Descriptor library. | |
17 | ||
18 | This program is free software; you can redistribute it and/or modify | |
19 | it under the terms of the GNU General Public License as published by | |
20 | the Free Software Foundation; either version 2 of the License, or | |
21 | (at your option) any later version. | |
22 | ||
23 | This program is distributed in the hope that it will be useful, | |
24 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
25 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
26 | GNU General Public License for more details. | |
27 | ||
28 | You should have received a copy of the GNU General Public License | |
29 | along with this program; if not, write to the Free Software | |
30 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
31 | ||
244ffee7 JK |
32 | /* Problems and other issues to resolve. |
33 | ||
34 | (1) BFD expects there to be some fixed number of "sections" in | |
35 | the object file. I.E. there is a "section_count" variable in the | |
36 | bfd structure which contains the number of sections. However, ELF | |
37 | supports multiple "views" of a file. In particular, with current | |
38 | implementations, executable files typically have two tables, a | |
39 | program header table and a section header table, both of which | |
40 | partition the executable. | |
41 | ||
42 | In ELF-speak, the "linking view" of the file uses the section header | |
43 | table to access "sections" within the file, and the "execution view" | |
44 | uses the program header table to access "segments" within the file. | |
45 | "Segments" typically may contain all the data from one or more | |
46 | "sections". | |
47 | ||
48 | Note that the section header table is optional in ELF executables, | |
49 | but it is this information that is most useful to gdb. If the | |
50 | section header table is missing, then gdb should probably try | |
51 | to make do with the program header table. (FIXME) | |
52 | ||
6a3eb9b6 KR |
53 | (2) The code in this file is compiled twice, once in 32-bit mode and |
54 | once in 64-bit mode. More of it should be made size-independent | |
55 | and moved into elf.c. | |
56 | ||
d24928c0 KR |
57 | (3) ELF section symbols are handled rather sloppily now. This should |
58 | be cleaned up, and ELF section symbols reconciled with BFD section | |
59 | symbols. | |
60 | */ | |
244ffee7 | 61 | |
32090b8e | 62 | #include <assert.h> |
244ffee7 JK |
63 | #include <string.h> /* For strrchr and friends */ |
64 | #include "bfd.h" | |
65 | #include "sysdep.h" | |
66 | #include "libbfd.h" | |
67 | #include "libelf.h" | |
68 | ||
300adb31 KR |
69 | #ifndef alloca |
70 | PTR alloca (); | |
71 | #endif | |
72 | ||
32090b8e | 73 | /* Renaming structures, typedefs, macros and functions to be size-specific. */ |
244ffee7 | 74 | #define Elf_External_Ehdr NAME(Elf,External_Ehdr) |
244ffee7 | 75 | #define Elf_External_Sym NAME(Elf,External_Sym) |
244ffee7 | 76 | #define Elf_External_Shdr NAME(Elf,External_Shdr) |
244ffee7 | 77 | #define Elf_External_Phdr NAME(Elf,External_Phdr) |
244ffee7 JK |
78 | #define Elf_External_Rel NAME(Elf,External_Rel) |
79 | #define Elf_External_Rela NAME(Elf,External_Rela) | |
244ffee7 | 80 | |
244ffee7 JK |
81 | #define elf_core_file_failing_command NAME(bfd_elf,core_file_failing_command) |
82 | #define elf_core_file_failing_signal NAME(bfd_elf,core_file_failing_signal) | |
83 | #define elf_core_file_matches_executable_p NAME(bfd_elf,core_file_matches_executable_p) | |
84 | #define elf_object_p NAME(bfd_elf,object_p) | |
85 | #define elf_core_file_p NAME(bfd_elf,core_file_p) | |
244ffee7 JK |
86 | #define elf_get_symtab_upper_bound NAME(bfd_elf,get_symtab_upper_bound) |
87 | #define elf_get_reloc_upper_bound NAME(bfd_elf,get_reloc_upper_bound) | |
88 | #define elf_canonicalize_reloc NAME(bfd_elf,canonicalize_reloc) | |
89 | #define elf_get_symtab NAME(bfd_elf,get_symtab) | |
90 | #define elf_make_empty_symbol NAME(bfd_elf,make_empty_symbol) | |
91 | #define elf_get_symbol_info NAME(bfd_elf,get_symbol_info) | |
92 | #define elf_print_symbol NAME(bfd_elf,print_symbol) | |
93 | #define elf_get_lineno NAME(bfd_elf,get_lineno) | |
94 | #define elf_set_arch_mach NAME(bfd_elf,set_arch_mach) | |
95 | #define elf_find_nearest_line NAME(bfd_elf,find_nearest_line) | |
96 | #define elf_sizeof_headers NAME(bfd_elf,sizeof_headers) | |
97 | #define elf_set_section_contents NAME(bfd_elf,set_section_contents) | |
98 | #define elf_no_info_to_howto NAME(bfd_elf,no_info_to_howto) | |
99 | #define elf_no_info_to_howto_rel NAME(bfd_elf,no_info_to_howto_rel) | |
fce36137 | 100 | #define elf_new_section_hook NAME(bfd_elf,new_section_hook) |
32090b8e | 101 | #define write_relocs NAME(bfd_elf,_write_relocs) |
f035cc47 | 102 | #define elf_find_section NAME(bfd_elf,find_section) |
244ffee7 | 103 | |
6a3eb9b6 KR |
104 | #if ARCH_SIZE == 64 |
105 | #define ELF_R_INFO(X,Y) ELF64_R_INFO(X,Y) | |
106 | #define ELF_R_SYM(X) ELF64_R_SYM(X) | |
32090b8e | 107 | #define ELFCLASS ELFCLASS64 |
f035cc47 | 108 | #define FILE_ALIGN 8 |
6a3eb9b6 KR |
109 | #endif |
110 | #if ARCH_SIZE == 32 | |
111 | #define ELF_R_INFO(X,Y) ELF32_R_INFO(X,Y) | |
112 | #define ELF_R_SYM(X) ELF32_R_SYM(X) | |
32090b8e | 113 | #define ELFCLASS ELFCLASS32 |
f035cc47 | 114 | #define FILE_ALIGN 4 |
244ffee7 JK |
115 | #endif |
116 | ||
32090b8e KR |
117 | static int shstrtab_length_fixed; |
118 | ||
119 | struct elf_sect_data { | |
120 | int reloc_sec; | |
121 | /* more? */ | |
122 | }; | |
123 | ||
244ffee7 JK |
124 | /* Forward declarations of static functions */ |
125 | ||
244ffee7 JK |
126 | static struct sec * section_from_elf_index PARAMS ((bfd *, int)); |
127 | ||
128 | static int elf_section_from_bfd_section PARAMS ((bfd *, struct sec *)); | |
129 | ||
130 | static boolean elf_slurp_symbol_table PARAMS ((bfd *, asymbol **)); | |
131 | ||
244ffee7 JK |
132 | static int elf_symbol_from_bfd_symbol PARAMS ((bfd *, |
133 | struct symbol_cache_entry **)); | |
134 | ||
238ac6ec | 135 | static void elf_map_symbols PARAMS ((bfd *)); |
32090b8e | 136 | static void swap_out_syms PARAMS ((bfd *)); |
244ffee7 | 137 | |
6a3eb9b6 KR |
138 | #ifdef DEBUG |
139 | static void elf_debug_section PARAMS ((char *, int, Elf_Internal_Shdr *)); | |
140 | static void elf_debug_file PARAMS ((Elf_Internal_Ehdr *)); | |
141 | #endif | |
238ac6ec | 142 | |
32090b8e KR |
143 | #define elf_string_from_elf_strtab(abfd,strindex) \ |
144 | elf_string_from_elf_section(abfd,elf_elfheader(abfd)->e_shstrndx,strindex) | |
145 | ||
146 | \f | |
147 | /* Structure swapping routines */ | |
148 | ||
6a3eb9b6 KR |
149 | /* Should perhaps use put_offset, put_word, etc. For now, the two versions |
150 | can be handled by explicitly specifying 32 bits or "the long type". */ | |
238ac6ec KR |
151 | #if ARCH_SIZE == 64 |
152 | #define put_word bfd_h_put_64 | |
153 | #define get_word bfd_h_get_64 | |
154 | #endif | |
155 | #if ARCH_SIZE == 32 | |
156 | #define put_word bfd_h_put_32 | |
157 | #define get_word bfd_h_get_32 | |
158 | #endif | |
159 | ||
244ffee7 JK |
160 | /* Translate an ELF symbol in external format into an ELF symbol in internal |
161 | format. */ | |
162 | ||
163 | static void | |
164 | DEFUN (elf_swap_symbol_in, (abfd, src, dst), | |
165 | bfd * abfd AND | |
166 | Elf_External_Sym * src AND | |
167 | Elf_Internal_Sym * dst) | |
168 | { | |
169 | dst->st_name = bfd_h_get_32 (abfd, (bfd_byte *) src->st_name); | |
238ac6ec KR |
170 | dst->st_value = get_word (abfd, (bfd_byte *) src->st_value); |
171 | dst->st_size = get_word (abfd, (bfd_byte *) src->st_size); | |
244ffee7 JK |
172 | dst->st_info = bfd_h_get_8 (abfd, (bfd_byte *) src->st_info); |
173 | dst->st_other = bfd_h_get_8 (abfd, (bfd_byte *) src->st_other); | |
174 | dst->st_shndx = bfd_h_get_16 (abfd, (bfd_byte *) src->st_shndx); | |
175 | } | |
176 | ||
177 | /* Translate an ELF symbol in internal format into an ELF symbol in external | |
178 | format. */ | |
179 | ||
180 | static void | |
181 | DEFUN (elf_swap_symbol_out, (abfd, src, dst), | |
182 | bfd * abfd AND | |
183 | Elf_Internal_Sym * src AND | |
184 | Elf_External_Sym * dst) | |
185 | { | |
186 | bfd_h_put_32 (abfd, src->st_name, dst->st_name); | |
238ac6ec KR |
187 | put_word (abfd, src->st_value, dst->st_value); |
188 | put_word (abfd, src->st_size, dst->st_size); | |
244ffee7 JK |
189 | bfd_h_put_8 (abfd, src->st_info, dst->st_info); |
190 | bfd_h_put_8 (abfd, src->st_other, dst->st_other); | |
191 | bfd_h_put_16 (abfd, src->st_shndx, dst->st_shndx); | |
192 | } | |
193 | ||
194 | ||
195 | /* Translate an ELF file header in external format into an ELF file header in | |
196 | internal format. */ | |
197 | ||
198 | static void | |
199 | DEFUN (elf_swap_ehdr_in, (abfd, src, dst), | |
200 | bfd * abfd AND | |
201 | Elf_External_Ehdr * src AND | |
202 | Elf_Internal_Ehdr * dst) | |
203 | { | |
204 | memcpy (dst->e_ident, src->e_ident, EI_NIDENT); | |
205 | dst->e_type = bfd_h_get_16 (abfd, (bfd_byte *) src->e_type); | |
206 | dst->e_machine = bfd_h_get_16 (abfd, (bfd_byte *) src->e_machine); | |
207 | dst->e_version = bfd_h_get_32 (abfd, (bfd_byte *) src->e_version); | |
238ac6ec KR |
208 | dst->e_entry = get_word (abfd, (bfd_byte *) src->e_entry); |
209 | dst->e_phoff = get_word (abfd, (bfd_byte *) src->e_phoff); | |
210 | dst->e_shoff = get_word (abfd, (bfd_byte *) src->e_shoff); | |
244ffee7 JK |
211 | dst->e_flags = bfd_h_get_32 (abfd, (bfd_byte *) src->e_flags); |
212 | dst->e_ehsize = bfd_h_get_16 (abfd, (bfd_byte *) src->e_ehsize); | |
213 | dst->e_phentsize = bfd_h_get_16 (abfd, (bfd_byte *) src->e_phentsize); | |
214 | dst->e_phnum = bfd_h_get_16 (abfd, (bfd_byte *) src->e_phnum); | |
215 | dst->e_shentsize = bfd_h_get_16 (abfd, (bfd_byte *) src->e_shentsize); | |
216 | dst->e_shnum = bfd_h_get_16 (abfd, (bfd_byte *) src->e_shnum); | |
217 | dst->e_shstrndx = bfd_h_get_16 (abfd, (bfd_byte *) src->e_shstrndx); | |
218 | } | |
219 | ||
220 | /* Translate an ELF file header in internal format into an ELF file header in | |
221 | external format. */ | |
222 | ||
223 | static void | |
224 | DEFUN (elf_swap_ehdr_out, (abfd, src, dst), | |
225 | bfd * abfd AND | |
226 | Elf_Internal_Ehdr * src AND | |
227 | Elf_External_Ehdr * dst) | |
228 | { | |
229 | memcpy (dst->e_ident, src->e_ident, EI_NIDENT); | |
230 | /* note that all elements of dst are *arrays of unsigned char* already... */ | |
231 | bfd_h_put_16 (abfd, src->e_type, dst->e_type); | |
232 | bfd_h_put_16 (abfd, src->e_machine, dst->e_machine); | |
233 | bfd_h_put_32 (abfd, src->e_version, dst->e_version); | |
238ac6ec KR |
234 | put_word (abfd, src->e_entry, dst->e_entry); |
235 | put_word (abfd, src->e_phoff, dst->e_phoff); | |
236 | put_word (abfd, src->e_shoff, dst->e_shoff); | |
244ffee7 JK |
237 | bfd_h_put_32 (abfd, src->e_flags, dst->e_flags); |
238 | bfd_h_put_16 (abfd, src->e_ehsize, dst->e_ehsize); | |
239 | bfd_h_put_16 (abfd, src->e_phentsize, dst->e_phentsize); | |
240 | bfd_h_put_16 (abfd, src->e_phnum, dst->e_phnum); | |
241 | bfd_h_put_16 (abfd, src->e_shentsize, dst->e_shentsize); | |
242 | bfd_h_put_16 (abfd, src->e_shnum, dst->e_shnum); | |
243 | bfd_h_put_16 (abfd, src->e_shstrndx, dst->e_shstrndx); | |
244 | } | |
245 | ||
246 | ||
247 | /* Translate an ELF section header table entry in external format into an | |
248 | ELF section header table entry in internal format. */ | |
249 | ||
250 | static void | |
251 | DEFUN (elf_swap_shdr_in, (abfd, src, dst), | |
252 | bfd * abfd AND | |
253 | Elf_External_Shdr * src AND | |
254 | Elf_Internal_Shdr * dst) | |
255 | { | |
256 | dst->sh_name = bfd_h_get_32 (abfd, (bfd_byte *) src->sh_name); | |
257 | dst->sh_type = bfd_h_get_32 (abfd, (bfd_byte *) src->sh_type); | |
238ac6ec KR |
258 | dst->sh_flags = get_word (abfd, (bfd_byte *) src->sh_flags); |
259 | dst->sh_addr = get_word (abfd, (bfd_byte *) src->sh_addr); | |
260 | dst->sh_offset = get_word (abfd, (bfd_byte *) src->sh_offset); | |
261 | dst->sh_size = get_word (abfd, (bfd_byte *) src->sh_size); | |
244ffee7 JK |
262 | dst->sh_link = bfd_h_get_32 (abfd, (bfd_byte *) src->sh_link); |
263 | dst->sh_info = bfd_h_get_32 (abfd, (bfd_byte *) src->sh_info); | |
238ac6ec KR |
264 | dst->sh_addralign = get_word (abfd, (bfd_byte *) src->sh_addralign); |
265 | dst->sh_entsize = get_word (abfd, (bfd_byte *) src->sh_entsize); | |
244ffee7 JK |
266 | /* we haven't done any processing on it yet, so... */ |
267 | dst->rawdata = (void *) 0; | |
268 | } | |
269 | ||
270 | /* Translate an ELF section header table entry in internal format into an | |
271 | ELF section header table entry in external format. */ | |
272 | ||
273 | static void | |
274 | DEFUN (elf_swap_shdr_out, (abfd, src, dst), | |
275 | bfd * abfd AND | |
276 | Elf_Internal_Shdr * src AND | |
277 | Elf_External_Shdr * dst) | |
278 | { | |
279 | /* note that all elements of dst are *arrays of unsigned char* already... */ | |
280 | bfd_h_put_32 (abfd, src->sh_name, dst->sh_name); | |
281 | bfd_h_put_32 (abfd, src->sh_type, dst->sh_type); | |
238ac6ec KR |
282 | put_word (abfd, src->sh_flags, dst->sh_flags); |
283 | put_word (abfd, src->sh_addr, dst->sh_addr); | |
284 | put_word (abfd, src->sh_offset, dst->sh_offset); | |
285 | put_word (abfd, src->sh_size, dst->sh_size); | |
244ffee7 JK |
286 | bfd_h_put_32 (abfd, src->sh_link, dst->sh_link); |
287 | bfd_h_put_32 (abfd, src->sh_info, dst->sh_info); | |
238ac6ec KR |
288 | put_word (abfd, src->sh_addralign, dst->sh_addralign); |
289 | put_word (abfd, src->sh_entsize, dst->sh_entsize); | |
244ffee7 JK |
290 | } |
291 | ||
292 | ||
293 | /* Translate an ELF program header table entry in external format into an | |
294 | ELF program header table entry in internal format. */ | |
295 | ||
296 | static void | |
297 | DEFUN (elf_swap_phdr_in, (abfd, src, dst), | |
298 | bfd * abfd AND | |
299 | Elf_External_Phdr * src AND | |
300 | Elf_Internal_Phdr * dst) | |
301 | { | |
302 | dst->p_type = bfd_h_get_32 (abfd, (bfd_byte *) src->p_type); | |
244ffee7 | 303 | dst->p_flags = bfd_h_get_32 (abfd, (bfd_byte *) src->p_flags); |
238ac6ec KR |
304 | dst->p_offset = get_word (abfd, (bfd_byte *) src->p_offset); |
305 | dst->p_vaddr = get_word (abfd, (bfd_byte *) src->p_vaddr); | |
306 | dst->p_paddr = get_word (abfd, (bfd_byte *) src->p_paddr); | |
307 | dst->p_filesz = get_word (abfd, (bfd_byte *) src->p_filesz); | |
308 | dst->p_memsz = get_word (abfd, (bfd_byte *) src->p_memsz); | |
309 | dst->p_align = get_word (abfd, (bfd_byte *) src->p_align); | |
244ffee7 JK |
310 | } |
311 | ||
244ffee7 JK |
312 | static void |
313 | DEFUN (elf_swap_phdr_out, (abfd, src, dst), | |
314 | bfd * abfd AND | |
315 | Elf_Internal_Phdr * src AND | |
316 | Elf_External_Phdr * dst) | |
317 | { | |
318 | /* note that all elements of dst are *arrays of unsigned char* already... */ | |
319 | bfd_h_put_32 (abfd, src->p_type, dst->p_type); | |
94dbb655 KR |
320 | put_word (abfd, src->p_offset, dst->p_offset); |
321 | put_word (abfd, src->p_vaddr, dst->p_vaddr); | |
322 | put_word (abfd, src->p_paddr, dst->p_paddr); | |
323 | put_word (abfd, src->p_filesz, dst->p_filesz); | |
324 | put_word (abfd, src->p_memsz, dst->p_memsz); | |
244ffee7 | 325 | bfd_h_put_32 (abfd, src->p_flags, dst->p_flags); |
94dbb655 | 326 | put_word (abfd, src->p_align, dst->p_align); |
244ffee7 JK |
327 | } |
328 | ||
329 | /* Translate an ELF reloc from external format to internal format. */ | |
32090b8e | 330 | static INLINE void |
244ffee7 JK |
331 | DEFUN (elf_swap_reloc_in, (abfd, src, dst), |
332 | bfd * abfd AND | |
333 | Elf_External_Rel * src AND | |
334 | Elf_Internal_Rel * dst) | |
335 | { | |
94dbb655 KR |
336 | dst->r_offset = get_word (abfd, (bfd_byte *) src->r_offset); |
337 | dst->r_info = get_word (abfd, (bfd_byte *) src->r_info); | |
244ffee7 JK |
338 | } |
339 | ||
32090b8e | 340 | static INLINE void |
244ffee7 JK |
341 | DEFUN (elf_swap_reloca_in, (abfd, src, dst), |
342 | bfd * abfd AND | |
343 | Elf_External_Rela * src AND | |
344 | Elf_Internal_Rela * dst) | |
345 | { | |
94dbb655 KR |
346 | dst->r_offset = get_word (abfd, (bfd_byte *) src->r_offset); |
347 | dst->r_info = get_word (abfd, (bfd_byte *) src->r_info); | |
348 | dst->r_addend = get_word (abfd, (bfd_byte *) src->r_addend); | |
244ffee7 JK |
349 | } |
350 | ||
351 | /* Translate an ELF reloc from internal format to external format. */ | |
32090b8e | 352 | static INLINE void |
244ffee7 JK |
353 | DEFUN (elf_swap_reloc_out, (abfd, src, dst), |
354 | bfd * abfd AND | |
355 | Elf_Internal_Rel * src AND | |
356 | Elf_External_Rel * dst) | |
357 | { | |
94dbb655 KR |
358 | put_word (abfd, src->r_offset, dst->r_offset); |
359 | put_word (abfd, src->r_info, dst->r_info); | |
244ffee7 JK |
360 | } |
361 | ||
32090b8e | 362 | static INLINE void |
244ffee7 JK |
363 | DEFUN (elf_swap_reloca_out, (abfd, src, dst), |
364 | bfd * abfd AND | |
365 | Elf_Internal_Rela * src AND | |
366 | Elf_External_Rela * dst) | |
367 | { | |
94dbb655 KR |
368 | put_word (abfd, src->r_offset, dst->r_offset); |
369 | put_word (abfd, src->r_info, dst->r_info); | |
370 | put_word (abfd, src->r_addend, dst->r_addend); | |
244ffee7 JK |
371 | } |
372 | ||
32090b8e KR |
373 | \f |
374 | ||
375 | /* String table creation/manipulation routines */ | |
376 | ||
377 | static struct strtab * | |
378 | DEFUN (bfd_new_strtab, (abfd), | |
379 | bfd * abfd) | |
380 | { | |
381 | struct strtab *ss; | |
382 | ||
383 | ss = (struct strtab *) bfd_xmalloc (sizeof (struct strtab)); | |
384 | ss->tab = bfd_xmalloc (1); | |
385 | BFD_ASSERT (ss->tab != 0); | |
386 | *ss->tab = 0; | |
387 | ss->nentries = 0; | |
388 | ss->length = 1; | |
244ffee7 | 389 | |
32090b8e KR |
390 | return ss; |
391 | } | |
392 | ||
393 | static int | |
394 | DEFUN (bfd_add_to_strtab, (abfd, ss, str), | |
395 | bfd * abfd AND | |
396 | struct strtab *ss AND | |
397 | CONST char *str) | |
398 | { | |
399 | /* should search first, but for now: */ | |
400 | /* include the trailing NUL */ | |
401 | int ln = strlen (str) + 1; | |
402 | ||
403 | /* should this be using obstacks? */ | |
404 | ss->tab = realloc (ss->tab, ss->length + ln); | |
405 | ||
406 | BFD_ASSERT (ss->tab != 0); | |
407 | strcpy (ss->tab + ss->length, str); | |
408 | ss->nentries++; | |
409 | ss->length += ln; | |
410 | ||
411 | return ss->length - ln; | |
412 | } | |
413 | ||
414 | static int | |
415 | DEFUN (bfd_add_2_to_strtab, (abfd, ss, str, str2), | |
416 | bfd * abfd AND | |
417 | struct strtab *ss AND | |
418 | char *str AND | |
419 | CONST char *str2) | |
244ffee7 | 420 | { |
32090b8e KR |
421 | /* should search first, but for now: */ |
422 | /* include the trailing NUL */ | |
423 | int ln = strlen (str) + strlen (str2) + 1; | |
424 | ||
425 | /* should this be using obstacks? */ | |
426 | if (ss->length) | |
427 | ss->tab = realloc (ss->tab, ss->length + ln); | |
428 | else | |
429 | ss->tab = bfd_xmalloc (ln); | |
430 | ||
431 | BFD_ASSERT (ss->tab != 0); | |
432 | strcpy (ss->tab + ss->length, str); | |
433 | strcpy (ss->tab + ss->length + strlen (str), str2); | |
434 | ss->nentries++; | |
435 | ss->length += ln; | |
436 | ||
437 | return ss->length - ln; | |
244ffee7 JK |
438 | } |
439 | ||
32090b8e KR |
440 | \f |
441 | /* ELF .o/exec file reading */ | |
442 | ||
443 | /* Create a new bfd section from an ELF section header. */ | |
444 | ||
244ffee7 JK |
445 | static boolean |
446 | DEFUN (bfd_section_from_shdr, (abfd, shindex), | |
447 | bfd * abfd AND | |
448 | unsigned int shindex) | |
449 | { | |
32090b8e KR |
450 | Elf_Internal_Shdr *hdr = elf_elfsections (abfd)[shindex]; |
451 | Elf_Internal_Ehdr *ehdr = elf_elfheader (abfd); | |
244ffee7 JK |
452 | asection *newsect; |
453 | char *name; | |
454 | ||
455 | name = elf_string_from_elf_strtab (abfd, hdr->sh_name); | |
456 | ||
457 | switch (hdr->sh_type) | |
458 | { | |
459 | ||
460 | case SHT_NULL: | |
461 | /* inactive section. Throw it away. */ | |
462 | return true; | |
463 | ||
464 | case SHT_PROGBITS: | |
465 | /* Bits that get saved. This one is real. */ | |
466 | if (!hdr->rawdata) | |
467 | { | |
468 | newsect = bfd_make_section (abfd, name); | |
469 | if (newsect != NULL) | |
470 | { | |
32090b8e KR |
471 | newsect->filepos = hdr->sh_offset; /* so we can read back the bits */ |
472 | newsect->flags |= SEC_HAS_CONTENTS; | |
244ffee7 JK |
473 | newsect->vma = hdr->sh_addr; |
474 | newsect->_raw_size = hdr->sh_size; | |
6a3eb9b6 | 475 | newsect->alignment_power = bfd_log2 (hdr->sh_addralign); |
244ffee7 JK |
476 | |
477 | if (hdr->sh_flags & SHF_ALLOC) | |
478 | { | |
479 | newsect->flags |= SEC_ALLOC; | |
480 | newsect->flags |= SEC_LOAD; | |
481 | } | |
482 | ||
483 | if (!(hdr->sh_flags & SHF_WRITE)) | |
484 | newsect->flags |= SEC_READONLY; | |
485 | ||
486 | if (hdr->sh_flags & SHF_EXECINSTR) | |
32090b8e | 487 | newsect->flags |= SEC_CODE; /* FIXME: may only contain SOME code */ |
36d541b1 | 488 | else if (newsect->flags & SEC_ALLOC) |
244ffee7 JK |
489 | newsect->flags |= SEC_DATA; |
490 | ||
d6e5f950 ILT |
491 | /* The debugging sections appear to recognized only by |
492 | name. */ | |
493 | if (strncmp (name, ".debug", sizeof ".debug" - 1) == 0 | |
494 | || strncmp (name, ".line", sizeof ".line" - 1) == 0 | |
495 | || strncmp (name, ".stab", sizeof ".stab" - 1) == 0) | |
496 | newsect->flags |= SEC_DEBUGGING; | |
497 | ||
244ffee7 JK |
498 | hdr->rawdata = (void *) newsect; |
499 | } | |
94dbb655 KR |
500 | else |
501 | hdr->rawdata = (void *) bfd_get_section_by_name (abfd, name); | |
244ffee7 JK |
502 | } |
503 | return true; | |
504 | ||
505 | case SHT_NOBITS: | |
506 | /* Bits that get saved. This one is real. */ | |
507 | if (!hdr->rawdata) | |
508 | { | |
509 | newsect = bfd_make_section (abfd, name); | |
510 | if (newsect != NULL) | |
511 | { | |
512 | newsect->vma = hdr->sh_addr; | |
513 | newsect->_raw_size = hdr->sh_size; | |
514 | newsect->filepos = hdr->sh_offset; /* fake */ | |
6a3eb9b6 | 515 | newsect->alignment_power = bfd_log2 (hdr->sh_addralign); |
244ffee7 JK |
516 | if (hdr->sh_flags & SHF_ALLOC) |
517 | newsect->flags |= SEC_ALLOC; | |
518 | ||
519 | if (!(hdr->sh_flags & SHF_WRITE)) | |
520 | newsect->flags |= SEC_READONLY; | |
521 | ||
36d541b1 ILT |
522 | /* FIXME: This section is empty. Does it really make |
523 | sense to set SEC_CODE for it? */ | |
244ffee7 JK |
524 | if (hdr->sh_flags & SHF_EXECINSTR) |
525 | newsect->flags |= SEC_CODE; /* FIXME: may only contain SOME code */ | |
244ffee7 JK |
526 | |
527 | hdr->rawdata = (void *) newsect; | |
528 | } | |
529 | } | |
530 | return true; | |
531 | ||
532 | case SHT_SYMTAB: /* A symbol table */ | |
32090b8e KR |
533 | if (elf_onesymtab (abfd) == shindex) |
534 | return true; | |
535 | ||
244ffee7 | 536 | BFD_ASSERT (hdr->sh_entsize == sizeof (Elf_External_Sym)); |
32090b8e | 537 | BFD_ASSERT (elf_onesymtab (abfd) == 0); |
244ffee7 | 538 | elf_onesymtab (abfd) = shindex; |
32090b8e KR |
539 | elf_tdata(abfd)->symtab_hdr = *hdr; |
540 | elf_elfsections(abfd)[shindex] = &elf_tdata(abfd)->symtab_hdr; | |
244ffee7 JK |
541 | abfd->flags |= HAS_SYMS; |
542 | return true; | |
543 | ||
544 | case SHT_STRTAB: /* A string table */ | |
32090b8e | 545 | if (hdr->rawdata) |
fce36137 | 546 | return true; |
32090b8e KR |
547 | if (ehdr->e_shstrndx == shindex) |
548 | { | |
549 | elf_tdata(abfd)->shstrtab_hdr = *hdr; | |
550 | elf_elfsections(abfd)[shindex] = &elf_tdata(abfd)->shstrtab_hdr; | |
551 | hdr->rawdata = (PTR) &elf_tdata(abfd)->shstrtab_hdr; | |
552 | return true; | |
553 | } | |
554 | { | |
555 | int i; | |
fce36137 | 556 | |
32090b8e KR |
557 | for (i = 1; i < ehdr->e_shnum; i++) |
558 | { | |
559 | Elf_Internal_Shdr *hdr2 = elf_elfsections(abfd)[i]; | |
560 | if (hdr2->sh_link == shindex) | |
561 | { | |
562 | bfd_section_from_shdr (abfd, i); | |
563 | if (elf_onesymtab (abfd) == i) | |
564 | { | |
565 | elf_tdata(abfd)->strtab_hdr = *hdr; | |
566 | elf_elfsections(abfd)[shindex] = &elf_tdata(abfd)->strtab_hdr; | |
567 | return true; | |
568 | } | |
569 | #if 0 /* Not handling other string tables specially right now. */ | |
570 | hdr2 = elf_elfsections(abfd)[i]; /* in case it moved */ | |
571 | /* We have a strtab for some random other section. */ | |
572 | newsect = (asection *) hdr2->rawdata; | |
573 | if (!newsect) | |
574 | break; | |
575 | hdr->rawdata = (PTR) newsect; | |
576 | hdr2 = &elf_section_data (newsect)->str_hdr; | |
577 | *hdr2 = *hdr; | |
578 | elf_elfsections(abfd)[shindex] = hdr2; | |
579 | #endif | |
580 | } | |
581 | } | |
582 | } | |
583 | ||
584 | newsect = bfd_make_section (abfd, name); | |
585 | if (newsect) | |
fce36137 | 586 | { |
32090b8e KR |
587 | newsect->flags = SEC_HAS_CONTENTS; |
588 | hdr->rawdata = (PTR) newsect; | |
589 | newsect->_raw_size = hdr->sh_size; | |
590 | newsect->alignment_power = 0; | |
591 | newsect->vma = 0; | |
f035cc47 | 592 | newsect->filepos = hdr->sh_offset; |
32090b8e KR |
593 | |
594 | if (hdr->sh_flags & SHF_ALLOC) | |
595 | newsect->flags |= SEC_ALLOC|SEC_LOAD; | |
596 | if (!(hdr->sh_flags & SHF_WRITE)) | |
597 | newsect->flags |= SEC_READONLY; | |
598 | if (hdr->sh_flags & SHF_EXECINSTR) | |
599 | newsect->flags |= SEC_CODE; | |
36d541b1 | 600 | else if (newsect->flags & SEC_ALLOC) |
32090b8e | 601 | newsect->flags |= SEC_DATA; |
01383fb4 KR |
602 | |
603 | /* Check for debugging string tables. */ | |
604 | if (strncmp (name, ".debug", sizeof ".debug" - 1) == 0 | |
605 | || strncmp (name, ".stab", sizeof ".stab" - 1) == 0) | |
606 | newsect->flags |= SEC_DEBUGGING; | |
fce36137 KR |
607 | } |
608 | ||
244ffee7 JK |
609 | return true; |
610 | ||
611 | case SHT_REL: | |
612 | case SHT_RELA: | |
32090b8e KR |
613 | /* *These* do a lot of work -- but build no sections! |
614 | The spec says there can be multiple strtabs, but only one symtab, | |
615 | but there can be lots of REL* sections. */ | |
244ffee7 | 616 | /* FIXME: The above statement is wrong! There are typically at least |
32090b8e KR |
617 | two symbol tables in a dynamically linked executable, ".dynsym" |
618 | which is the dynamic linkage symbol table and ".symtab", which is | |
619 | the "traditional" symbol table. -fnf */ | |
244ffee7 JK |
620 | |
621 | { | |
622 | asection *target_sect; | |
32090b8e | 623 | Elf_Internal_Shdr *hdr2; |
244ffee7 JK |
624 | int use_rela_p = get_elf_backend_data (abfd)->use_rela_p; |
625 | ||
626 | /* Don't allow REL relocations on a machine that uses RELA and | |
627 | vice versa. */ | |
628 | /* @@ Actually, the generic ABI does suggest that both might be | |
629 | used in one file. But the four ABI Processor Supplements I | |
630 | have access to right now all specify that only one is used on | |
631 | each of those architectures. It's conceivable that, e.g., a | |
632 | bunch of absolute 32-bit relocs might be more compact in REL | |
633 | form even on a RELA machine... */ | |
634 | BFD_ASSERT (!(use_rela_p && (hdr->sh_type == SHT_REL))); | |
635 | BFD_ASSERT (!(!use_rela_p && (hdr->sh_type == SHT_RELA))); | |
636 | BFD_ASSERT (hdr->sh_entsize == | |
637 | (use_rela_p | |
6a3eb9b6 KR |
638 | ? sizeof (Elf_External_Rela) |
639 | : sizeof (Elf_External_Rel))); | |
244ffee7 | 640 | |
244ffee7 | 641 | bfd_section_from_shdr (abfd, hdr->sh_info); /* target */ |
32090b8e | 642 | bfd_section_from_shdr (abfd, hdr->sh_link); /* symbol table */ |
244ffee7 | 643 | target_sect = section_from_elf_index (abfd, hdr->sh_info); |
062189c6 ILT |
644 | if (target_sect == NULL |
645 | || elf_section_data (target_sect) == NULL) | |
244ffee7 JK |
646 | return false; |
647 | ||
32090b8e KR |
648 | hdr2 = &elf_section_data (target_sect)->rel_hdr; |
649 | *hdr2 = *hdr; | |
650 | elf_elfsections(abfd)[shindex] = hdr2; | |
244ffee7 JK |
651 | target_sect->reloc_count = hdr->sh_size / hdr->sh_entsize; |
652 | target_sect->flags |= SEC_RELOC; | |
653 | target_sect->relocation = 0; | |
654 | target_sect->rel_filepos = hdr->sh_offset; | |
32090b8e | 655 | abfd->flags |= HAS_RELOC; |
244ffee7 JK |
656 | return true; |
657 | } | |
658 | break; | |
659 | ||
660 | case SHT_HASH: | |
661 | case SHT_DYNAMIC: | |
662 | case SHT_DYNSYM: /* could treat this like symtab... */ | |
663 | #if 0 | |
664 | fprintf (stderr, "Dynamic Linking sections not yet supported.\n"); | |
665 | BFD_FAIL (); | |
666 | #endif | |
667 | break; | |
668 | ||
669 | case SHT_NOTE: | |
670 | #if 0 | |
671 | fprintf (stderr, "Note Sections not yet supported.\n"); | |
672 | BFD_FAIL (); | |
673 | #endif | |
674 | break; | |
675 | ||
676 | case SHT_SHLIB: | |
677 | #if 0 | |
678 | fprintf (stderr, "SHLIB Sections not supported (and non conforming.)\n"); | |
679 | #endif | |
680 | return true; | |
681 | ||
682 | default: | |
e621c5cc ILT |
683 | /* Check for any processor-specific section types. */ |
684 | { | |
685 | struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
686 | ||
687 | if (bed->elf_backend_section_from_shdr) | |
688 | (*bed->elf_backend_section_from_shdr) (abfd, hdr, name); | |
689 | } | |
244ffee7 JK |
690 | break; |
691 | } | |
692 | ||
693 | return true; | |
694 | } | |
695 | ||
fce36137 KR |
696 | boolean |
697 | DEFUN (elf_new_section_hook, (abfd, sec), | |
698 | bfd *abfd | |
699 | AND asection *sec) | |
700 | { | |
32090b8e | 701 | struct bfd_elf_section_data *sdata; |
300adb31 KR |
702 | |
703 | sdata = (struct bfd_elf_section_data *) bfd_alloc (abfd, sizeof (*sdata)); | |
704 | sec->used_by_bfd = (PTR) sdata; | |
32090b8e | 705 | memset (sdata, 0, sizeof (*sdata)); |
244ffee7 JK |
706 | return true; |
707 | } | |
708 | ||
709 | /* Create a new bfd section from an ELF program header. | |
710 | ||
711 | Since program segments have no names, we generate a synthetic name | |
712 | of the form segment<NUM>, where NUM is generally the index in the | |
713 | program header table. For segments that are split (see below) we | |
714 | generate the names segment<NUM>a and segment<NUM>b. | |
715 | ||
716 | Note that some program segments may have a file size that is different than | |
717 | (less than) the memory size. All this means is that at execution the | |
718 | system must allocate the amount of memory specified by the memory size, | |
719 | but only initialize it with the first "file size" bytes read from the | |
720 | file. This would occur for example, with program segments consisting | |
721 | of combined data+bss. | |
722 | ||
723 | To handle the above situation, this routine generates TWO bfd sections | |
724 | for the single program segment. The first has the length specified by | |
725 | the file size of the segment, and the second has the length specified | |
726 | by the difference between the two sizes. In effect, the segment is split | |
727 | into it's initialized and uninitialized parts. | |
728 | ||
729 | */ | |
730 | ||
731 | static boolean | |
732 | DEFUN (bfd_section_from_phdr, (abfd, hdr, index), | |
733 | bfd * abfd AND | |
734 | Elf_Internal_Phdr * hdr AND | |
735 | int index) | |
736 | { | |
737 | asection *newsect; | |
738 | char *name; | |
739 | char namebuf[64]; | |
740 | int split; | |
741 | ||
742 | split = ((hdr->p_memsz > 0) && | |
743 | (hdr->p_filesz > 0) && | |
744 | (hdr->p_memsz > hdr->p_filesz)); | |
745 | sprintf (namebuf, split ? "segment%da" : "segment%d", index); | |
746 | name = bfd_alloc (abfd, strlen (namebuf) + 1); | |
747 | strcpy (name, namebuf); | |
748 | newsect = bfd_make_section (abfd, name); | |
749 | newsect->vma = hdr->p_vaddr; | |
750 | newsect->_raw_size = hdr->p_filesz; | |
751 | newsect->filepos = hdr->p_offset; | |
752 | newsect->flags |= SEC_HAS_CONTENTS; | |
753 | if (hdr->p_type == PT_LOAD) | |
754 | { | |
755 | newsect->flags |= SEC_ALLOC; | |
756 | newsect->flags |= SEC_LOAD; | |
757 | if (hdr->p_flags & PF_X) | |
758 | { | |
759 | /* FIXME: all we known is that it has execute PERMISSION, | |
760 | may be data. */ | |
761 | newsect->flags |= SEC_CODE; | |
762 | } | |
763 | } | |
764 | if (!(hdr->p_flags & PF_W)) | |
765 | { | |
766 | newsect->flags |= SEC_READONLY; | |
767 | } | |
768 | ||
769 | if (split) | |
770 | { | |
771 | sprintf (namebuf, "segment%db", index); | |
772 | name = bfd_alloc (abfd, strlen (namebuf) + 1); | |
773 | strcpy (name, namebuf); | |
774 | newsect = bfd_make_section (abfd, name); | |
775 | newsect->vma = hdr->p_vaddr + hdr->p_filesz; | |
776 | newsect->_raw_size = hdr->p_memsz - hdr->p_filesz; | |
777 | if (hdr->p_type == PT_LOAD) | |
778 | { | |
779 | newsect->flags |= SEC_ALLOC; | |
780 | if (hdr->p_flags & PF_X) | |
781 | newsect->flags |= SEC_CODE; | |
782 | } | |
783 | if (!(hdr->p_flags & PF_W)) | |
784 | newsect->flags |= SEC_READONLY; | |
785 | } | |
786 | ||
787 | return true; | |
788 | } | |
789 | ||
32090b8e | 790 | /* Begin processing a given object. |
244ffee7 | 791 | |
32090b8e KR |
792 | First we validate the file by reading in the ELF header and checking |
793 | the magic number. */ | |
794 | ||
795 | static INLINE boolean | |
796 | DEFUN (elf_file_p, (x_ehdrp), Elf_External_Ehdr * x_ehdrp) | |
244ffee7 | 797 | { |
32090b8e KR |
798 | return ((x_ehdrp->e_ident[EI_MAG0] == ELFMAG0) |
799 | && (x_ehdrp->e_ident[EI_MAG1] == ELFMAG1) | |
800 | && (x_ehdrp->e_ident[EI_MAG2] == ELFMAG2) | |
801 | && (x_ehdrp->e_ident[EI_MAG3] == ELFMAG3)); | |
802 | } | |
244ffee7 | 803 | |
d24928c0 KR |
804 | /* Check to see if the file associated with ABFD matches the target vector |
805 | that ABFD points to. | |
806 | ||
807 | Note that we may be called several times with the same ABFD, but different | |
808 | target vectors, most of which will not match. We have to avoid leaving | |
809 | any side effects in ABFD, or any data it points to (like tdata), if the | |
810 | file does not match the target vector. | |
811 | ||
812 | FIXME: There is memory leak if we are called more than once with the same | |
813 | ABFD, and that bfd already has tdata allocated, since we allocate more tdata | |
814 | and the old tdata is orphaned. Since it's in the bfd obstack, there isn't | |
01383fb4 | 815 | much we can do about this except possibly rewrite the code. There are |
d24928c0 KR |
816 | also other bfd_allocs that may be the source of memory leaks as well. */ |
817 | ||
32090b8e KR |
818 | bfd_target * |
819 | DEFUN (elf_object_p, (abfd), bfd * abfd) | |
244ffee7 | 820 | { |
32090b8e KR |
821 | Elf_External_Ehdr x_ehdr; /* Elf file header, external form */ |
822 | Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */ | |
823 | Elf_External_Shdr x_shdr; /* Section header table entry, external form */ | |
824 | Elf_Internal_Shdr *i_shdrp; /* Section header table, internal form */ | |
825 | int shindex; | |
826 | char *shstrtab; /* Internal copy of section header stringtab */ | |
062189c6 | 827 | struct elf_backend_data *ebd; |
d24928c0 | 828 | struct elf_obj_tdata *preserved_tdata = elf_tdata (abfd); |
244ffee7 | 829 | |
32090b8e KR |
830 | /* Read in the ELF header in external format. */ |
831 | ||
832 | if (bfd_read ((PTR) & x_ehdr, sizeof (x_ehdr), 1, abfd) != sizeof (x_ehdr)) | |
d24928c0 | 833 | goto got_system_call_error; |
244ffee7 | 834 | |
32090b8e KR |
835 | /* Now check to see if we have a valid ELF file, and one that BFD can |
836 | make use of. The magic number must match, the address size ('class') | |
837 | and byte-swapping must match our XVEC entry, and it must have a | |
838 | section header table (FIXME: See comments re sections at top of this | |
839 | file). */ | |
244ffee7 | 840 | |
d24928c0 KR |
841 | if ((elf_file_p (&x_ehdr) == false) || |
842 | (x_ehdr.e_ident[EI_VERSION] != EV_CURRENT) || | |
843 | (x_ehdr.e_ident[EI_CLASS] != ELFCLASS)) | |
844 | goto got_wrong_format_error; | |
244ffee7 | 845 | |
d24928c0 | 846 | /* Check that file's byte order matches xvec's */ |
32090b8e | 847 | switch (x_ehdr.e_ident[EI_DATA]) |
244ffee7 | 848 | { |
32090b8e KR |
849 | case ELFDATA2MSB: /* Big-endian */ |
850 | if (!abfd->xvec->header_byteorder_big_p) | |
d24928c0 | 851 | goto got_wrong_format_error; |
32090b8e KR |
852 | break; |
853 | case ELFDATA2LSB: /* Little-endian */ | |
854 | if (abfd->xvec->header_byteorder_big_p) | |
d24928c0 | 855 | goto got_wrong_format_error; |
32090b8e KR |
856 | break; |
857 | case ELFDATANONE: /* No data encoding specified */ | |
858 | default: /* Unknown data encoding specified */ | |
d24928c0 | 859 | goto got_wrong_format_error; |
244ffee7 | 860 | } |
244ffee7 | 861 | |
32090b8e | 862 | /* Allocate an instance of the elf_obj_tdata structure and hook it up to |
d24928c0 | 863 | the tdata pointer in the bfd. FIXME: memory leak, see above. */ |
244ffee7 | 864 | |
d24928c0 KR |
865 | elf_tdata (abfd) = |
866 | (struct elf_obj_tdata *) bfd_zalloc (abfd, sizeof (struct elf_obj_tdata)); | |
867 | if (elf_tdata (abfd) == NULL) | |
868 | goto got_no_memory_error; | |
244ffee7 | 869 | |
32090b8e KR |
870 | /* Now that we know the byte order, swap in the rest of the header */ |
871 | i_ehdrp = elf_elfheader (abfd); | |
872 | elf_swap_ehdr_in (abfd, &x_ehdr, i_ehdrp); | |
873 | #if DEBUG & 1 | |
874 | elf_debug_file (i_ehdrp); | |
244ffee7 JK |
875 | #endif |
876 | ||
32090b8e KR |
877 | /* If there is no section header table, we're hosed. */ |
878 | if (i_ehdrp->e_shoff == 0) | |
d24928c0 | 879 | goto got_wrong_format_error; |
244ffee7 | 880 | |
062189c6 ILT |
881 | /* As a simple sanity check, verify that the what BFD thinks is the |
882 | size of each section header table entry actually matches the size | |
883 | recorded in the file. */ | |
884 | if (i_ehdrp->e_shentsize != sizeof (x_shdr)) | |
885 | goto got_wrong_format_error; | |
886 | ||
887 | ebd = get_elf_backend_data (abfd); | |
888 | ||
889 | /* Check that the ELF e_machine field matches what this particular | |
890 | BFD format expects. */ | |
891 | if (ebd->elf_machine_code != i_ehdrp->e_machine) | |
892 | { | |
893 | bfd_target **target_ptr; | |
894 | ||
895 | if (ebd->elf_machine_code != EM_NONE) | |
896 | goto got_wrong_format_error; | |
897 | ||
898 | /* This is the generic ELF target. Let it match any ELF target | |
899 | for which we do not have a specific backend. */ | |
900 | for (target_ptr = target_vector; *target_ptr != NULL; target_ptr++) | |
901 | { | |
902 | struct elf_backend_data *back; | |
903 | ||
904 | if ((*target_ptr)->flavour != bfd_target_elf_flavour) | |
905 | continue; | |
906 | back = (struct elf_backend_data *) (*target_ptr)->backend_data; | |
907 | if (back->elf_machine_code == i_ehdrp->e_machine) | |
908 | { | |
909 | /* target_ptr is an ELF backend which matches this | |
910 | object file, so reject the generic ELF target. */ | |
911 | goto got_wrong_format_error; | |
912 | } | |
913 | } | |
914 | } | |
915 | ||
916 | ||
917 | /* Set the flags and architecture before calling the backend so that | |
918 | it can override them. */ | |
7b8106b4 | 919 | if (i_ehdrp->e_type == ET_EXEC) |
32090b8e | 920 | abfd->flags |= EXEC_P; |
7b8106b4 ILT |
921 | else if (i_ehdrp->e_type == ET_DYN) |
922 | abfd->flags |= DYNAMIC; | |
244ffee7 | 923 | |
062189c6 | 924 | bfd_default_set_arch_mach (abfd, ebd->arch, 0); |
32090b8e | 925 | |
062189c6 ILT |
926 | /* Remember the entry point specified in the ELF file header. */ |
927 | bfd_get_start_address (abfd) = i_ehdrp->e_entry; | |
32090b8e | 928 | |
062189c6 ILT |
929 | /* Let the backend double check the format and override global |
930 | information. */ | |
931 | if (ebd->elf_backend_object_p) | |
932 | { | |
933 | if ((*ebd->elf_backend_object_p) (abfd) == false) | |
934 | goto got_wrong_format_error; | |
935 | } | |
936 | ||
32090b8e KR |
937 | /* Allocate space for a copy of the section header table in |
938 | internal form, seek to the section header table in the file, | |
062189c6 | 939 | read it in, and convert it to internal form. */ |
32090b8e KR |
940 | i_shdrp = (Elf_Internal_Shdr *) |
941 | bfd_alloc (abfd, sizeof (*i_shdrp) * i_ehdrp->e_shnum); | |
300adb31 KR |
942 | elf_elfsections (abfd) = |
943 | (Elf_Internal_Shdr **) bfd_alloc (abfd, sizeof (i_shdrp) * i_ehdrp->e_shnum); | |
32090b8e | 944 | if (!i_shdrp || !elf_elfsections(abfd)) |
d24928c0 | 945 | goto got_no_memory_error; |
32090b8e | 946 | if (bfd_seek (abfd, i_ehdrp->e_shoff, SEEK_SET) == -1) |
d24928c0 | 947 | goto got_system_call_error; |
32090b8e | 948 | for (shindex = 0; shindex < i_ehdrp->e_shnum; shindex++) |
244ffee7 | 949 | { |
d24928c0 KR |
950 | if (bfd_read ((PTR) & x_shdr, sizeof x_shdr, 1, abfd) != sizeof (x_shdr)) |
951 | goto got_system_call_error; | |
32090b8e KR |
952 | elf_swap_shdr_in (abfd, &x_shdr, i_shdrp + shindex); |
953 | elf_elfsections(abfd)[shindex] = i_shdrp + shindex; | |
244ffee7 | 954 | } |
32090b8e | 955 | if (i_ehdrp->e_shstrndx) |
244ffee7 | 956 | { |
32090b8e | 957 | bfd_section_from_shdr (abfd, i_ehdrp->e_shstrndx); |
244ffee7 JK |
958 | } |
959 | ||
32090b8e KR |
960 | #if 0 |
961 | for (shindex = i_ehdrp->e_shnum - 1; shindex >= 0; shindex--) | |
962 | { | |
963 | if (!strcmp (elf_string_from_elf_strtab (abfd, | |
964 | i_shdrp[shindex].sh_name), | |
965 | ".strtab")) | |
966 | { | |
967 | elf_tdata(abfd)->strtab_hdr = i_shdrp[shindex]; | |
968 | elf_elfsections(abfd)[shindex] = &elf_tdata(abfd)->strtab_hdr; | |
969 | } | |
970 | else if (!strcmp (elf_string_from_elf_strtab (abfd, | |
971 | i_shdrp[shindex].sh_name), | |
972 | ".symtab")) | |
973 | { | |
974 | elf_tdata(abfd)->symtab_hdr = i_shdrp[shindex]; | |
975 | elf_elfsections(abfd)[shindex] = &elf_tdata(abfd)->symtab_hdr; | |
976 | elf_onesymtab (abfd) = shindex; | |
977 | } | |
978 | } | |
979 | #endif | |
244ffee7 | 980 | |
32090b8e KR |
981 | /* Read in the string table containing the names of the sections. We |
982 | will need the base pointer to this table later. */ | |
983 | /* We read this inline now, so that we don't have to go through | |
984 | bfd_section_from_shdr with it (since this particular strtab is | |
985 | used to find all of the ELF section names.) */ | |
244ffee7 | 986 | |
32090b8e KR |
987 | shstrtab = elf_get_str_section (abfd, i_ehdrp->e_shstrndx); |
988 | if (!shstrtab) | |
d24928c0 | 989 | goto got_wrong_format_error; |
244ffee7 | 990 | |
32090b8e KR |
991 | /* Once all of the section headers have been read and converted, we |
992 | can start processing them. Note that the first section header is | |
993 | a dummy placeholder entry, so we ignore it. | |
244ffee7 | 994 | |
32090b8e KR |
995 | We also watch for the symbol table section and remember the file |
996 | offset and section size for both the symbol table section and the | |
997 | associated string table section. */ | |
244ffee7 | 998 | |
32090b8e KR |
999 | for (shindex = 1; shindex < i_ehdrp->e_shnum; shindex++) |
1000 | { | |
1001 | bfd_section_from_shdr (abfd, shindex); | |
1002 | } | |
244ffee7 | 1003 | |
d24928c0 KR |
1004 | return (abfd->xvec); |
1005 | ||
1006 | /* If we are going to use goto's to avoid duplicating error setting | |
1007 | and return(NULL) code, then this at least makes it more maintainable. */ | |
1008 | ||
1009 | got_system_call_error: | |
1010 | bfd_error = system_call_error; | |
1011 | goto got_no_match; | |
1012 | got_wrong_format_error: | |
1013 | bfd_error = wrong_format; | |
1014 | goto got_no_match; | |
1015 | got_no_memory_error: | |
1016 | bfd_error = no_memory; | |
1017 | goto got_no_match; | |
1018 | got_no_match: | |
1019 | elf_tdata (abfd) = preserved_tdata; | |
1020 | return (NULL); | |
32090b8e | 1021 | } |
244ffee7 | 1022 | |
32090b8e KR |
1023 | \f |
1024 | /* ELF .o/exec file writing */ | |
1025 | ||
d24928c0 KR |
1026 | /* Takes a bfd and a symbol, returns a pointer to the elf specific area |
1027 | of the symbol if there is one. */ | |
32090b8e KR |
1028 | static INLINE elf_symbol_type * |
1029 | DEFUN (elf_symbol_from, (ignore_abfd, symbol), | |
1030 | bfd * ignore_abfd AND | |
1031 | asymbol * symbol) | |
244ffee7 | 1032 | { |
32090b8e KR |
1033 | if (symbol->the_bfd->xvec->flavour != bfd_target_elf_flavour) |
1034 | return 0; | |
1035 | ||
1036 | if (symbol->the_bfd->tdata.elf_obj_data == (struct elf_obj_tdata *) NULL) | |
1037 | return 0; | |
1038 | ||
1039 | return (elf_symbol_type *) symbol; | |
244ffee7 JK |
1040 | } |
1041 | ||
d24928c0 | 1042 | /* Create ELF output from BFD sections. |
244ffee7 | 1043 | |
d24928c0 KR |
1044 | Essentially, just create the section header and forget about the program |
1045 | header for now. */ | |
244ffee7 | 1046 | |
32090b8e KR |
1047 | static void |
1048 | DEFUN (elf_make_sections, (abfd, asect, obj), | |
1049 | bfd * abfd AND | |
1050 | asection * asect AND | |
1051 | PTR obj) | |
1052 | { | |
1053 | /* most of what is in bfd_shdr_from_section goes in here... */ | |
1054 | /* and all of these sections generate at *least* one ELF section. */ | |
32090b8e KR |
1055 | Elf_Internal_Shdr *this_hdr; |
1056 | this_hdr = &elf_section_data (asect)->this_hdr; | |
244ffee7 | 1057 | |
32090b8e KR |
1058 | this_hdr->sh_addr = asect->vma; |
1059 | this_hdr->sh_size = asect->_raw_size; | |
1060 | /* contents already set by elf_set_section_contents */ | |
244ffee7 | 1061 | |
300adb31 | 1062 | if (asect->flags & SEC_RELOC) |
244ffee7 | 1063 | { |
32090b8e KR |
1064 | /* emit a reloc section, and thus strtab and symtab... */ |
1065 | Elf_Internal_Shdr *rela_hdr; | |
32090b8e | 1066 | int use_rela_p = get_elf_backend_data (abfd)->use_rela_p; |
244ffee7 | 1067 | |
32090b8e | 1068 | rela_hdr = &elf_section_data (asect)->rel_hdr; |
244ffee7 | 1069 | |
32090b8e KR |
1070 | /* orelocation has the data, reloc_count has the count... */ |
1071 | if (use_rela_p) | |
1072 | { | |
1073 | rela_hdr->sh_type = SHT_RELA; | |
1074 | rela_hdr->sh_entsize = sizeof (Elf_External_Rela); | |
1075 | } | |
1076 | else | |
1077 | /* REL relocations */ | |
1078 | { | |
1079 | rela_hdr->sh_type = SHT_REL; | |
1080 | rela_hdr->sh_entsize = sizeof (Elf_External_Rel); | |
1081 | } | |
1082 | rela_hdr->sh_flags = 0; | |
1083 | rela_hdr->sh_addr = 0; | |
1084 | rela_hdr->sh_offset = 0; | |
062189c6 ILT |
1085 | |
1086 | /* FIXME: Systems I've checked use an alignment of 4, but it is | |
1087 | possible that some systems use a different alignment. */ | |
1088 | rela_hdr->sh_addralign = 4; | |
1089 | ||
32090b8e KR |
1090 | rela_hdr->size = 0; |
1091 | } | |
1092 | if (asect->flags & SEC_ALLOC) | |
244ffee7 | 1093 | { |
32090b8e KR |
1094 | this_hdr->sh_flags |= SHF_ALLOC; |
1095 | if (asect->flags & SEC_LOAD) | |
1096 | { | |
1097 | /* @@ Do something with sh_type? */ | |
1098 | } | |
244ffee7 | 1099 | } |
f035cc47 ILT |
1100 | else |
1101 | { | |
1102 | /* If this section is not part of the program image during | |
1103 | execution, leave the address fields at 0. */ | |
1104 | this_hdr->sh_addr = 0; | |
1105 | asect->vma = 0; | |
1106 | } | |
32090b8e KR |
1107 | if (!(asect->flags & SEC_READONLY)) |
1108 | this_hdr->sh_flags |= SHF_WRITE; | |
244ffee7 | 1109 | |
32090b8e KR |
1110 | if (asect->flags & SEC_CODE) |
1111 | this_hdr->sh_flags |= SHF_EXECINSTR; | |
1112 | } | |
244ffee7 | 1113 | |
32090b8e KR |
1114 | void |
1115 | write_relocs (abfd, sec, xxx) | |
1116 | bfd *abfd; | |
1117 | asection *sec; | |
1118 | PTR xxx; | |
1119 | { | |
1120 | Elf_Internal_Shdr *rela_hdr; | |
1121 | Elf_External_Rela *outbound_relocas; | |
1122 | Elf_External_Rel *outbound_relocs; | |
1123 | int idx; | |
1124 | int use_rela_p = get_elf_backend_data (abfd)->use_rela_p; | |
300adb31 KR |
1125 | asymbol *last_sym = 0; |
1126 | int last_sym_idx; | |
244ffee7 | 1127 | |
32090b8e KR |
1128 | if ((sec->flags & SEC_RELOC) == 0) |
1129 | return; | |
1130 | /* Flags are sometimes inconsistent. */ | |
1131 | if (sec->reloc_count == 0) | |
1132 | return; | |
244ffee7 | 1133 | |
32090b8e | 1134 | rela_hdr = &elf_section_data (sec)->rel_hdr; |
244ffee7 | 1135 | |
32090b8e KR |
1136 | rela_hdr->sh_size = rela_hdr->sh_entsize * sec->reloc_count; |
1137 | rela_hdr->contents = (void *) bfd_alloc (abfd, rela_hdr->sh_size); | |
244ffee7 | 1138 | |
32090b8e | 1139 | /* orelocation has the data, reloc_count has the count... */ |
300adb31 KR |
1140 | if (use_rela_p) |
1141 | { | |
1142 | outbound_relocas = (Elf_External_Rela *) rela_hdr->contents; | |
1143 | ||
1144 | for (idx = 0; idx < sec->reloc_count; idx++) | |
32090b8e | 1145 | { |
300adb31 KR |
1146 | Elf_Internal_Rela dst_rela; |
1147 | Elf_External_Rela *src_rela; | |
1148 | arelent *ptr; | |
1149 | asymbol *sym; | |
1150 | int n; | |
1151 | ||
1152 | ptr = sec->orelocation[idx]; | |
1153 | src_rela = outbound_relocas + idx; | |
1154 | if (!(abfd->flags & EXEC_P)) | |
1155 | dst_rela.r_offset = ptr->address - sec->vma; | |
1156 | else | |
1157 | dst_rela.r_offset = ptr->address; | |
6a3eb9b6 | 1158 | |
300adb31 KR |
1159 | sym = *ptr->sym_ptr_ptr; |
1160 | if (sym == last_sym) | |
1161 | n = last_sym_idx; | |
1162 | else | |
32090b8e | 1163 | { |
300adb31 KR |
1164 | last_sym = sym; |
1165 | last_sym_idx = n = elf_symbol_from_bfd_symbol (abfd, &sym); | |
32090b8e | 1166 | } |
300adb31 KR |
1167 | dst_rela.r_info = ELF_R_INFO (n, ptr->howto->type); |
1168 | ||
1169 | dst_rela.r_addend = ptr->addend; | |
1170 | elf_swap_reloca_out (abfd, &dst_rela, src_rela); | |
244ffee7 | 1171 | } |
300adb31 KR |
1172 | } |
1173 | else | |
1174 | /* REL relocations */ | |
1175 | { | |
1176 | outbound_relocs = (Elf_External_Rel *) rela_hdr->contents; | |
1177 | ||
1178 | for (idx = 0; idx < sec->reloc_count; idx++) | |
32090b8e | 1179 | { |
300adb31 KR |
1180 | Elf_Internal_Rel dst_rel; |
1181 | Elf_External_Rel *src_rel; | |
1182 | arelent *ptr; | |
1183 | int n; | |
1184 | asymbol *sym; | |
1185 | ||
1186 | ptr = sec->orelocation[idx]; | |
1187 | sym = *ptr->sym_ptr_ptr; | |
1188 | src_rel = outbound_relocs + idx; | |
1189 | if (!(abfd->flags & EXEC_P)) | |
1190 | dst_rel.r_offset = ptr->address - sec->vma; | |
1191 | else | |
1192 | dst_rel.r_offset = ptr->address; | |
244ffee7 | 1193 | |
300adb31 KR |
1194 | if (sym == last_sym) |
1195 | n = last_sym_idx; | |
1196 | else | |
32090b8e | 1197 | { |
300adb31 KR |
1198 | last_sym = sym; |
1199 | last_sym_idx = n = elf_symbol_from_bfd_symbol (abfd, &sym); | |
32090b8e | 1200 | } |
300adb31 KR |
1201 | dst_rel.r_info = ELF_R_INFO (n, ptr->howto->type); |
1202 | ||
1203 | elf_swap_reloc_out (abfd, &dst_rel, src_rel); | |
32090b8e | 1204 | } |
300adb31 | 1205 | } |
32090b8e | 1206 | } |
244ffee7 | 1207 | |
32090b8e KR |
1208 | static void |
1209 | fix_up_strtabs (abfd, asect, obj) | |
1210 | bfd *abfd; | |
1211 | asection *asect; | |
1212 | PTR obj; | |
1213 | { | |
1214 | Elf_Internal_Shdr *this_hdr = &elf_section_data (asect)->this_hdr; | |
1215 | int this_idx = elf_section_data(asect)->this_idx; | |
244ffee7 | 1216 | |
32090b8e KR |
1217 | /* @@ Check flags! */ |
1218 | if (!strncmp (asect->name, ".stab", 5) | |
1219 | && !strcmp ("str", asect->name + strlen (asect->name) - 3)) | |
1220 | { | |
1221 | size_t len = strlen (asect->name) + 1; | |
e74034d8 | 1222 | char *s = (char *) alloca (len); |
32090b8e KR |
1223 | strcpy (s, asect->name); |
1224 | s[len - 4] = 0; | |
1225 | asect = bfd_get_section_by_name (abfd, s); | |
1226 | if (!asect) | |
1227 | abort (); | |
1228 | elf_section_data(asect)->this_hdr.sh_link = this_idx; | |
32090b8e | 1229 | /* @@ Assuming 32 bits! */ |
01383fb4 KR |
1230 | elf_section_data(asect)->this_hdr.sh_entsize = 0xc; |
1231 | ||
1232 | this_hdr->sh_type = SHT_STRTAB; | |
244ffee7 | 1233 | } |
32090b8e | 1234 | } |
244ffee7 | 1235 | |
32090b8e KR |
1236 | static void |
1237 | DEFUN (elf_fake_sections, (abfd, asect, obj), | |
1238 | bfd * abfd AND | |
1239 | asection * asect AND | |
1240 | PTR obj) | |
1241 | { | |
1242 | /* most of what is in bfd_shdr_from_section goes in here... */ | |
1243 | /* and all of these sections generate at *least* one ELF section. */ | |
244ffee7 | 1244 | |
32090b8e KR |
1245 | Elf_Internal_Shdr *this_hdr; |
1246 | this_hdr = &elf_section_data (asect)->this_hdr; | |
1247 | this_hdr->sh_name = | |
1248 | bfd_add_to_strtab (abfd, elf_shstrtab (abfd), asect->name); | |
1249 | /* We need to log the type *now* so that elf_section_from_bfd_section | |
1250 | can find us... have to set rawdata too. */ | |
1251 | this_hdr->rawdata = (void *) asect; | |
1252 | this_hdr->sh_addralign = 1 << asect->alignment_power; | |
1253 | if ((asect->flags & SEC_ALLOC) && (asect->flags & SEC_LOAD)) | |
1254 | this_hdr->sh_type = SHT_PROGBITS; | |
e621c5cc ILT |
1255 | else if ((asect->flags & SEC_ALLOC) && ((asect->flags & SEC_LOAD) == 0)) |
1256 | { | |
1257 | BFD_ASSERT (!strcmp (asect->name, ".bss")); | |
1258 | this_hdr->sh_type = SHT_NOBITS; | |
1259 | } | |
1260 | /* FIXME I am not sure how to detect a .note section from the flags | |
1261 | word of an `asection'. */ | |
1262 | else if (!strcmp (asect->name, ".note")) | |
1263 | this_hdr->sh_type = SHT_NOTE; | |
32090b8e | 1264 | else |
32090b8e KR |
1265 | this_hdr->sh_type = SHT_PROGBITS; |
1266 | ||
1267 | this_hdr->sh_flags = 0; | |
1268 | this_hdr->sh_addr = 0; | |
1269 | this_hdr->sh_size = 0; | |
1270 | this_hdr->sh_entsize = 0; | |
1271 | this_hdr->sh_info = 0; | |
1272 | this_hdr->sh_link = 0; | |
1273 | this_hdr->sh_offset = 0; | |
1274 | this_hdr->size = 0; | |
244ffee7 | 1275 | |
f035cc47 ILT |
1276 | /* Now, check for processor-specific section types. */ |
1277 | { | |
1278 | struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
1279 | ||
1280 | if (bed->elf_backend_fake_sections) | |
1281 | (*bed->elf_backend_fake_sections) (abfd, this_hdr, asect); | |
1282 | } | |
1283 | ||
32090b8e KR |
1284 | { |
1285 | /* Emit a strtab and symtab, and possibly a reloc section. */ | |
1286 | Elf_Internal_Shdr *rela_hdr; | |
244ffee7 | 1287 | |
32090b8e KR |
1288 | /* Note that only one symtab is used, so just remember it |
1289 | for now. */ | |
244ffee7 | 1290 | |
300adb31 | 1291 | if (asect->flags & SEC_RELOC) |
32090b8e KR |
1292 | { |
1293 | int use_rela_p = get_elf_backend_data (abfd)->use_rela_p; | |
244ffee7 | 1294 | |
32090b8e KR |
1295 | rela_hdr = &elf_section_data (asect)->rel_hdr; |
1296 | rela_hdr->sh_name = | |
1297 | bfd_add_2_to_strtab (abfd, elf_shstrtab (abfd), | |
1298 | use_rela_p ? ".rela" : ".rel", | |
1299 | asect->name); | |
1300 | rela_hdr->sh_type = use_rela_p ? SHT_RELA : SHT_REL; | |
1301 | rela_hdr->sh_entsize = (use_rela_p | |
1302 | ? sizeof (Elf_External_Rela) | |
1303 | : sizeof (Elf_External_Rel)); | |
1304 | ||
1305 | rela_hdr->sh_flags = 0; | |
1306 | rela_hdr->sh_addr = 0; | |
1307 | rela_hdr->sh_size = 0; | |
1308 | rela_hdr->sh_offset = 0; | |
062189c6 ILT |
1309 | |
1310 | /* FIXME: Systems I've checked use an alignment of 4, but some | |
1311 | systems may use a different alignment. */ | |
1312 | rela_hdr->sh_addralign = 4; | |
1313 | ||
32090b8e KR |
1314 | rela_hdr->size = 0; |
1315 | } | |
1316 | } | |
1317 | if (asect->flags & SEC_ALLOC) | |
1318 | { | |
1319 | this_hdr->sh_flags |= SHF_ALLOC; | |
1320 | if (asect->flags & SEC_LOAD) | |
1321 | { | |
1322 | /* @@ Do something with sh_type? */ | |
1323 | } | |
1324 | } | |
1325 | if (!(asect->flags & SEC_READONLY)) | |
1326 | this_hdr->sh_flags |= SHF_WRITE; | |
1327 | if (asect->flags & SEC_CODE) | |
1328 | this_hdr->sh_flags |= SHF_EXECINSTR; | |
244ffee7 JK |
1329 | } |
1330 | ||
32090b8e KR |
1331 | /* Map symbol from it's internal number to the external number, moving |
1332 | all local symbols to be at the head of the list. */ | |
244ffee7 | 1333 | |
32090b8e | 1334 | static INLINE int |
062189c6 ILT |
1335 | sym_is_global (abfd, sym) |
1336 | bfd *abfd; | |
32090b8e KR |
1337 | asymbol *sym; |
1338 | { | |
062189c6 ILT |
1339 | /* If the backend has a special mapping, use it. */ |
1340 | if (get_elf_backend_data (abfd)->elf_backend_sym_is_global) | |
1341 | return ((*get_elf_backend_data (abfd)->elf_backend_sym_is_global) | |
1342 | (abfd, sym)); | |
1343 | ||
d24928c0 | 1344 | if (sym->flags & (BSF_GLOBAL | BSF_WEAK)) |
244ffee7 | 1345 | { |
32090b8e KR |
1346 | if (sym->flags & BSF_LOCAL) |
1347 | abort (); | |
1348 | return 1; | |
244ffee7 | 1349 | } |
d24928c0 KR |
1350 | if (sym->section == 0) |
1351 | { | |
1352 | /* Is this valid? */ | |
1353 | abort (); | |
1354 | ||
1355 | return 1; | |
1356 | } | |
32090b8e KR |
1357 | if (sym->section == &bfd_und_section) |
1358 | return 1; | |
1359 | if (bfd_is_com_section (sym->section)) | |
1360 | return 1; | |
1361 | if (sym->flags & (BSF_LOCAL | BSF_SECTION_SYM | BSF_FILE)) | |
1362 | return 0; | |
1363 | return 0; | |
1364 | } | |
244ffee7 | 1365 | |
32090b8e KR |
1366 | static void |
1367 | DEFUN (elf_map_symbols, (abfd), bfd * abfd) | |
1368 | { | |
1369 | int symcount = bfd_get_symcount (abfd); | |
1370 | asymbol **syms = bfd_get_outsymbols (abfd); | |
d24928c0 | 1371 | asymbol **sect_syms; |
32090b8e KR |
1372 | int num_locals = 0; |
1373 | int num_globals = 0; | |
1374 | int num_locals2 = 0; | |
1375 | int num_globals2 = 0; | |
d24928c0 | 1376 | int max_index = 0; |
32090b8e | 1377 | int num_sections = 0; |
d24928c0 | 1378 | Elf_Sym_Extra *sym_extra; |
32090b8e KR |
1379 | int idx; |
1380 | asection *asect; | |
6a3eb9b6 | 1381 | |
32090b8e KR |
1382 | #ifdef DEBUG |
1383 | fprintf (stderr, "elf_map_symbols\n"); | |
1384 | fflush (stderr); | |
1385 | #endif | |
244ffee7 | 1386 | |
e621c5cc ILT |
1387 | /* Add local symbols for each section for which there are relocs. |
1388 | FIXME: How can we tell which sections have relocs at this point? | |
1389 | Will reloc_count always be accurate? Actually, I think most ELF | |
1390 | targets create section symbols for all sections anyhow. */ | |
32090b8e | 1391 | for (asect = abfd->sections; asect; asect = asect->next) |
244ffee7 | 1392 | { |
d24928c0 KR |
1393 | if (max_index < asect->index) |
1394 | max_index = asect->index; | |
244ffee7 JK |
1395 | } |
1396 | ||
d24928c0 KR |
1397 | max_index++; |
1398 | elf_num_section_syms (abfd) = max_index; | |
1399 | sect_syms = (asymbol **) bfd_zalloc (abfd, max_index * sizeof (asymbol *)); | |
1400 | elf_section_syms (abfd) = sect_syms; | |
1401 | ||
1402 | BFD_ASSERT (sect_syms != 0); | |
1403 | ||
1404 | for (asect = abfd->sections; asect; asect = asect->next) | |
e621c5cc ILT |
1405 | { |
1406 | asymbol *sym = bfd_make_empty_symbol (abfd); | |
1407 | sym->the_bfd = abfd; | |
1408 | sym->name = asect->name; | |
1409 | sym->value = asect->vma; | |
1410 | sym->flags = BSF_SECTION_SYM; | |
1411 | sym->section = asect; | |
1412 | sect_syms[asect->index] = sym; | |
1413 | num_sections++; | |
d24928c0 | 1414 | #ifdef DEBUG |
e621c5cc ILT |
1415 | fprintf (stderr, |
1416 | "creating section symbol, name = %s, value = 0x%.8lx, index = %d, section = 0x%.8lx\n", | |
1417 | asect->name, (long) asect->vma, asect->index, (long) asect); | |
d24928c0 | 1418 | #endif |
e621c5cc | 1419 | } |
d24928c0 | 1420 | |
32090b8e | 1421 | if (num_sections) |
244ffee7 | 1422 | { |
32090b8e KR |
1423 | if (syms) |
1424 | syms = (asymbol **) bfd_realloc (abfd, syms, | |
1425 | ((symcount + num_sections + 1) | |
1426 | * sizeof (asymbol *))); | |
1427 | else | |
1428 | syms = (asymbol **) bfd_alloc (abfd, | |
1429 | (num_sections + 1) * sizeof (asymbol *)); | |
244ffee7 | 1430 | |
32090b8e KR |
1431 | for (asect = abfd->sections; asect; asect = asect->next) |
1432 | { | |
d24928c0 KR |
1433 | if (sect_syms[asect->index]) |
1434 | syms[symcount++] = sect_syms[asect->index]; | |
32090b8e | 1435 | } |
244ffee7 | 1436 | |
32090b8e KR |
1437 | syms[symcount] = (asymbol *) 0; |
1438 | bfd_set_symtab (abfd, syms, symcount); | |
1439 | } | |
244ffee7 | 1440 | |
d24928c0 KR |
1441 | elf_sym_extra (abfd) = sym_extra |
1442 | = (Elf_Sym_Extra *) bfd_alloc (abfd, symcount * sizeof (Elf_Sym_Extra)); | |
244ffee7 | 1443 | |
32090b8e KR |
1444 | /* Identify and classify all of the symbols. */ |
1445 | for (idx = 0; idx < symcount; idx++) | |
244ffee7 | 1446 | { |
062189c6 | 1447 | if (!sym_is_global (abfd, syms[idx])) |
32090b8e KR |
1448 | num_locals++; |
1449 | else | |
1450 | num_globals++; | |
244ffee7 | 1451 | } |
32090b8e KR |
1452 | |
1453 | /* Now provide mapping information. Add +1 for skipping over the | |
1454 | dummy symbol. */ | |
1455 | for (idx = 0; idx < symcount; idx++) | |
244ffee7 | 1456 | { |
d24928c0 | 1457 | syms[idx]->udata = (PTR) &sym_extra[idx]; |
062189c6 | 1458 | if (!sym_is_global (abfd, syms[idx])) |
d24928c0 | 1459 | sym_extra[idx].elf_sym_num = 1 + num_locals2++; |
32090b8e | 1460 | else |
d24928c0 | 1461 | sym_extra[idx].elf_sym_num = 1 + num_locals + num_globals2++; |
244ffee7 JK |
1462 | } |
1463 | ||
32090b8e KR |
1464 | elf_num_locals (abfd) = num_locals; |
1465 | elf_num_globals (abfd) = num_globals; | |
1466 | } | |
244ffee7 | 1467 | |
32090b8e KR |
1468 | static void assign_section_numbers (); |
1469 | static void assign_file_positions_except_relocs (); | |
244ffee7 | 1470 | |
32090b8e KR |
1471 | static boolean |
1472 | DEFUN (elf_compute_section_file_positions, (abfd), bfd * abfd) | |
1473 | { | |
32090b8e | 1474 | bfd_map_over_sections (abfd, elf_fake_sections, 0); |
244ffee7 | 1475 | |
32090b8e | 1476 | assign_section_numbers (abfd); |
244ffee7 | 1477 | |
32090b8e | 1478 | bfd_map_over_sections (abfd, elf_make_sections, 0); |
244ffee7 | 1479 | |
32090b8e | 1480 | bfd_map_over_sections (abfd, fix_up_strtabs, 0); /* .stab/.stabstr &c */ |
244ffee7 | 1481 | |
32090b8e | 1482 | swap_out_syms (abfd); |
244ffee7 | 1483 | |
32090b8e KR |
1484 | assign_file_positions_except_relocs (abfd); |
1485 | ||
1486 | return true; | |
1487 | } | |
1488 | ||
1489 | static boolean | |
1490 | DEFUN (elf_write_phdrs, (abfd, i_ehdrp, i_phdrp, phdr_cnt), | |
1491 | bfd * abfd AND | |
1492 | Elf_Internal_Ehdr * i_ehdrp AND | |
1493 | Elf_Internal_Phdr * i_phdrp AND | |
1494 | Elf32_Half phdr_cnt) | |
244ffee7 | 1495 | { |
32090b8e | 1496 | /* first program header entry goes after the file header */ |
300adb31 | 1497 | int outbase = i_ehdrp->e_phoff; |
244ffee7 | 1498 | int i; |
32090b8e KR |
1499 | Elf_External_Phdr x_phdr; |
1500 | ||
1501 | for (i = 0; i < phdr_cnt; i++) | |
244ffee7 | 1502 | { |
32090b8e KR |
1503 | elf_swap_phdr_out (abfd, i_phdrp + i, &x_phdr); |
1504 | bfd_seek (abfd, outbase, SEEK_SET); | |
1505 | bfd_write ((PTR) & x_phdr, sizeof (x_phdr), 1, abfd); | |
1506 | outbase += sizeof (x_phdr); | |
244ffee7 | 1507 | } |
32090b8e KR |
1508 | |
1509 | return true; | |
244ffee7 JK |
1510 | } |
1511 | ||
32090b8e KR |
1512 | static const Elf_Internal_Shdr null_shdr; |
1513 | ||
1514 | /* Assign all ELF section numbers. The dummy first section is handled here | |
1515 | too. The link/info pointers for the standard section types are filled | |
1516 | in here too, while we're at it. (Link pointers for .stab sections are | |
1517 | not filled in here.) */ | |
fce36137 | 1518 | static void |
32090b8e | 1519 | assign_section_numbers (abfd) |
fce36137 | 1520 | bfd *abfd; |
fce36137 | 1521 | { |
32090b8e KR |
1522 | struct elf_obj_tdata *t = elf_tdata (abfd); |
1523 | asection *sec; | |
1524 | int section_number = 1; | |
1525 | int i; | |
1526 | Elf_Internal_Shdr **i_shdrp; | |
244ffee7 | 1527 | |
32090b8e KR |
1528 | t->shstrtab_hdr.sh_size = elf_shstrtab(abfd)->length; |
1529 | t->shstrtab_hdr.contents = (void *) elf_shstrtab(abfd)->tab; | |
1530 | shstrtab_length_fixed = 1; | |
244ffee7 | 1531 | |
32090b8e KR |
1532 | t->shstrtab_section = section_number++; |
1533 | elf_elfheader(abfd)->e_shstrndx = t->shstrtab_section; | |
1534 | if (abfd->symcount) | |
1535 | { | |
1536 | t->symtab_section = section_number++; | |
1537 | t->strtab_section = section_number++; | |
1538 | t->symtab_hdr.sh_link = t->strtab_section; | |
1539 | } | |
1540 | for (sec = abfd->sections; sec; sec = sec->next) | |
1541 | { | |
1542 | struct bfd_elf_section_data *d = elf_section_data (sec); | |
1543 | d->this_idx = section_number++; | |
300adb31 | 1544 | if (sec->flags & SEC_RELOC) |
fce36137 | 1545 | { |
32090b8e KR |
1546 | d->rel_idx = section_number++; |
1547 | d->rel_hdr.sh_link = t->symtab_section; | |
1548 | d->rel_hdr.sh_info = d->this_idx; | |
244ffee7 | 1549 | } |
fce36137 | 1550 | else |
32090b8e KR |
1551 | d->rel_idx = 0; |
1552 | /* No handling for per-section string tables currently. */ | |
1553 | } | |
1554 | elf_elfheader(abfd)->e_shnum = section_number; | |
1555 | ||
1556 | /* Set up the list of section header pointers, in agreement with the | |
1557 | indices. */ | |
300adb31 KR |
1558 | i_shdrp = (Elf_Internal_Shdr **) |
1559 | bfd_alloc (abfd, section_number * sizeof (Elf_Internal_Shdr *)); | |
32090b8e KR |
1560 | elf_elfsections(abfd) = i_shdrp; |
1561 | for (i = 0; i < section_number; i++) | |
1562 | i_shdrp[i] = 0; | |
1563 | ||
1564 | i_shdrp[0] = (Elf_Internal_Shdr *) &null_shdr; | |
1565 | i_shdrp[t->shstrtab_section] = &t->shstrtab_hdr; | |
1566 | if (abfd->symcount) | |
1567 | { | |
1568 | i_shdrp[t->symtab_section] = &t->symtab_hdr; | |
1569 | i_shdrp[t->strtab_section] = &t->strtab_hdr; | |
244ffee7 | 1570 | } |
32090b8e KR |
1571 | for (sec = abfd->sections; sec; sec = sec->next) |
1572 | { | |
1573 | struct bfd_elf_section_data *d = elf_section_data (sec); | |
1574 | i_shdrp[d->this_idx] = &d->this_hdr; | |
1575 | if (d->rel_idx) | |
1576 | i_shdrp[d->rel_idx] = &d->rel_hdr; | |
1577 | } | |
1578 | /* Make sure we got everything.... */ | |
1579 | for (i = 0; i < section_number; i++) | |
1580 | if (i_shdrp[i] == 0) | |
1581 | abort (); | |
1582 | } | |
1583 | ||
1584 | static INLINE file_ptr | |
1585 | assign_file_position_for_section (i_shdrp, offset) | |
1586 | Elf_Internal_Shdr *i_shdrp; | |
1587 | file_ptr offset; | |
1588 | { | |
f035cc47 ILT |
1589 | int align; |
1590 | ||
1591 | if (i_shdrp->sh_addralign != 0) | |
1592 | align = i_shdrp->sh_addralign; | |
1593 | else | |
1594 | align = 1; | |
1595 | i_shdrp->sh_offset = offset = BFD_ALIGN (offset, align); | |
7b8106b4 ILT |
1596 | if (i_shdrp->rawdata != NULL) |
1597 | ((asection *) i_shdrp->rawdata)->filepos = offset; | |
300adb31 KR |
1598 | if (i_shdrp->sh_type != SHT_NOBITS) |
1599 | offset += i_shdrp->sh_size; | |
32090b8e | 1600 | return offset; |
244ffee7 JK |
1601 | } |
1602 | ||
01383fb4 KR |
1603 | static INLINE file_ptr |
1604 | align_file_position (off) | |
1605 | file_ptr off; | |
1606 | { | |
f035cc47 | 1607 | return (off + FILE_ALIGN - 1) & ~(FILE_ALIGN - 1); |
01383fb4 KR |
1608 | } |
1609 | ||
300adb31 KR |
1610 | static INLINE file_ptr |
1611 | assign_file_positions_for_symtab_and_strtabs (abfd, off) | |
1612 | bfd *abfd; | |
1613 | file_ptr off; | |
1614 | { | |
1615 | struct elf_obj_tdata *t = elf_tdata (abfd); | |
1616 | ||
01383fb4 | 1617 | off = align_file_position (off); |
300adb31 | 1618 | off = assign_file_position_for_section (&t->symtab_hdr, off); |
01383fb4 | 1619 | off = assign_file_position_for_section (&t->shstrtab_hdr, off); |
300adb31 KR |
1620 | off = assign_file_position_for_section (&t->strtab_hdr, off); |
1621 | return off; | |
1622 | } | |
1623 | ||
1624 | struct seg_info { | |
1625 | bfd_vma low, mem_size; | |
1626 | file_ptr file_size; | |
1627 | int start_pos; | |
1628 | int sh_flags; | |
1629 | struct seg_info *next; | |
1630 | }; | |
1631 | ||
1632 | static void | |
1633 | map_program_segments (abfd) | |
1634 | bfd *abfd; | |
1635 | { | |
1636 | Elf_Internal_Shdr **i_shdrpp = elf_elfsections (abfd); | |
1637 | Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd); | |
1638 | Elf_Internal_Shdr *i_shdrp; | |
1639 | Elf_Internal_Phdr *phdr; | |
1640 | char *done; | |
1641 | int i, n_left = 0; | |
1642 | file_ptr lowest_offset = 0; | |
1643 | struct seg_info *seg = 0; | |
1644 | ||
e74034d8 | 1645 | done = (char *) alloca (i_ehdrp->e_shnum); |
300adb31 | 1646 | memset (done, 0, i_ehdrp->e_shnum); |
062189c6 | 1647 | for (i = 1; i < i_ehdrp->e_shnum; i++) |
300adb31 KR |
1648 | { |
1649 | i_shdrp = i_shdrpp[i]; | |
1650 | /* If it's going to be mapped in, it's been assigned a position. */ | |
1651 | if (i_shdrp->sh_offset + 1 == 0) | |
1652 | { | |
1653 | /* Well, not really, but we won't process it here. */ | |
1654 | done[i] = 1; | |
1655 | continue; | |
1656 | } | |
1657 | if (i_shdrp->sh_offset < lowest_offset | |
1658 | || lowest_offset == 0) | |
1659 | lowest_offset = i_shdrp->sh_offset; | |
1660 | /* Only interested in PROGBITS or NOBITS for generating segments. */ | |
1661 | switch (i_shdrp->sh_type) | |
1662 | { | |
1663 | case SHT_PROGBITS: | |
1664 | case SHT_NOBITS: | |
1665 | break; | |
1666 | default: | |
1667 | done[i] = 1; | |
1668 | } | |
1669 | if (!done[i]) | |
1670 | n_left++; | |
1671 | } | |
1672 | while (n_left) | |
1673 | { | |
1674 | bfd_vma lowest_vma = -1, high; | |
1675 | int low_sec = 0; | |
1676 | int mem_size; | |
1677 | int file_size = 0; | |
1678 | ||
1679 | for (i = 1; i < i_ehdrp->e_shnum; i++) | |
1680 | { | |
1681 | i_shdrp = i_shdrpp[i]; | |
1682 | if (!done[i] && i_shdrp->sh_addr < lowest_vma) | |
1683 | { | |
1684 | lowest_vma = i_shdrp->sh_addr; | |
1685 | low_sec = i; | |
1686 | } | |
1687 | } | |
1688 | if (low_sec == 0) | |
1689 | abort (); | |
1690 | /* So now we know the lowest vma of any unassigned sections; start | |
1691 | a segment there. */ | |
1692 | { | |
1693 | struct seg_info *s; | |
1694 | s = (struct seg_info *) bfd_alloc (abfd, sizeof (struct seg_info)); | |
1695 | s->next = seg; | |
1696 | seg = s; | |
1697 | } | |
1698 | seg->low = lowest_vma; | |
1699 | i_shdrp = i_shdrpp[low_sec]; | |
1700 | seg->start_pos = i_shdrp->sh_offset; | |
1701 | seg->sh_flags = i_shdrp->sh_flags; | |
1702 | done[low_sec] = 1, n_left--; | |
1703 | mem_size = i_shdrp->sh_size; | |
1704 | high = lowest_vma + i_shdrp->sh_size; | |
1705 | ||
1706 | if (i_shdrp->sh_type == SHT_PROGBITS) | |
1707 | file_size = i_shdrp->sh_size; | |
1708 | ||
062189c6 | 1709 | for (i = 1; i < i_ehdrp->e_shnum; i++) |
300adb31 KR |
1710 | { |
1711 | file_ptr f1; | |
1712 | ||
1713 | if (file_size != mem_size) | |
1714 | break; | |
1715 | if (done[i]) | |
1716 | continue; | |
1717 | i_shdrp = i_shdrpp[i]; | |
1718 | /* position of next byte on disk */ | |
1719 | f1 = seg->start_pos + file_size; | |
1720 | if (i_shdrp->sh_type == SHT_PROGBITS) | |
1721 | { | |
1722 | if (i_shdrp->sh_offset - f1 != i_shdrp->sh_addr - high) | |
1723 | continue; | |
1724 | } | |
1725 | else /* sh_type == NOBITS */ | |
1726 | { | |
1727 | /* If the section in question has no contents in the disk | |
1728 | file, we really don't care where it supposedly starts. | |
1729 | But we don't want to bother merging it into this segment | |
1730 | if it doesn't start on this memory page. */ | |
1731 | bfd_vma page1, page2; | |
1732 | bfd_vma maxpagesize = get_elf_backend_data (abfd)->maxpagesize; | |
1733 | ||
1734 | /* page number in address space of current end of seg */ | |
1735 | page1 = (high - 1 + maxpagesize - 1) / maxpagesize; | |
1736 | /* page number in address space of start of this section */ | |
1737 | page2 = (i_shdrp->sh_addr + maxpagesize - 1) / maxpagesize; | |
1738 | ||
1739 | if (page1 != page2) | |
1740 | continue; | |
1741 | } | |
1742 | done[i] = 1, n_left--; | |
1743 | if (i_shdrp->sh_type == SHT_PROGBITS) | |
1744 | file_size = i_shdrp->sh_offset + i_shdrp->sh_size - seg->start_pos; | |
1745 | mem_size = i_shdrp->sh_addr + i_shdrp->sh_size - seg->low; | |
1746 | high = i_shdrp->sh_addr + i_shdrp->sh_size; | |
1747 | i = 0; | |
1748 | } | |
1749 | seg->file_size = file_size; | |
1750 | seg->mem_size = mem_size; | |
1751 | } | |
1752 | /* Now do something with the list of segments we've built up. */ | |
1753 | { | |
1754 | bfd_vma maxpagesize = get_elf_backend_data (abfd)->maxpagesize; | |
1755 | struct seg_info *s; | |
1756 | int n_segs = 0; | |
1757 | int sz; | |
1758 | ||
1759 | for (s = seg; s; s = s->next) | |
1760 | { | |
1761 | n_segs++; | |
1762 | } | |
1763 | i_ehdrp->e_phentsize = sizeof (Elf_External_Phdr); | |
1764 | sz = sizeof (Elf_External_Phdr) * n_segs; | |
01383fb4 KR |
1765 | if (align_file_position (i_ehdrp->e_ehsize) + sz <= lowest_offset) |
1766 | i_ehdrp->e_phoff = align_file_position (i_ehdrp->e_ehsize); | |
300adb31 KR |
1767 | else |
1768 | { | |
01383fb4 KR |
1769 | i_ehdrp->e_phoff = align_file_position (elf_tdata (abfd)->next_file_pos); |
1770 | elf_tdata (abfd)->next_file_pos = i_ehdrp->e_phoff + sz; | |
300adb31 | 1771 | } |
e74034d8 KR |
1772 | phdr = (Elf_Internal_Phdr*) bfd_alloc (abfd, |
1773 | n_segs * sizeof (Elf_Internal_Phdr)); | |
300adb31 KR |
1774 | elf_tdata (abfd)->phdr = phdr; |
1775 | while (seg) | |
1776 | { | |
1777 | phdr->p_type = PT_LOAD; /* only type we really support so far */ | |
1778 | phdr->p_offset = seg->start_pos; | |
1779 | phdr->p_vaddr = seg->low; | |
1780 | phdr->p_paddr = 0; | |
1781 | phdr->p_filesz = seg->file_size; | |
1782 | phdr->p_memsz = seg->mem_size; | |
1783 | phdr->p_flags = PF_R; | |
1784 | phdr->p_align = maxpagesize; /* ? */ | |
1785 | if (seg->sh_flags & SHF_WRITE) | |
e621c5cc ILT |
1786 | /* SysVr4 ELF docs say "data segments normally have read, write, |
1787 | and execute permissions." */ | |
1788 | phdr->p_flags |= (PF_W | PF_X); | |
300adb31 KR |
1789 | if (seg->sh_flags & SHF_EXECINSTR) |
1790 | phdr->p_flags |= PF_X; | |
1791 | phdr++; | |
1792 | seg = seg->next; | |
1793 | } | |
1794 | i_ehdrp->e_phnum = n_segs; | |
1795 | } | |
1796 | elf_write_phdrs (abfd, i_ehdrp, elf_tdata (abfd)->phdr, i_ehdrp->e_phnum); | |
1797 | } | |
1798 | ||
244ffee7 | 1799 | static void |
32090b8e KR |
1800 | assign_file_positions_except_relocs (abfd) |
1801 | bfd *abfd; | |
244ffee7 | 1802 | { |
32090b8e KR |
1803 | /* For now, we ignore the possibility of having program segments, which |
1804 | may require some alignment in the file. That'll require padding, and | |
1805 | some interesting calculations to optimize file space usage. | |
244ffee7 | 1806 | |
32090b8e KR |
1807 | Also, since the application may change the list of relocations for |
1808 | a given section, we don't figure them in here. We'll put them at the | |
1809 | end of the file, at positions computed during bfd_close. | |
244ffee7 | 1810 | |
300adb31 KR |
1811 | The order, for now: <ehdr> <shdr> <sec1> <sec2> <sec3> ... <rel1> ... |
1812 | or: <ehdr> <phdr> <sec1> <sec2> ... <shdr> <rel1> ... */ | |
32090b8e | 1813 | |
062189c6 | 1814 | struct elf_obj_tdata *t = elf_tdata (abfd); |
32090b8e KR |
1815 | file_ptr off; |
1816 | int i; | |
1817 | Elf_Internal_Shdr **i_shdrpp = elf_elfsections (abfd); | |
1818 | Elf_Internal_Shdr *i_shdrp; | |
1819 | Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd); | |
300adb31 | 1820 | int exec_p = (abfd->flags & EXEC_P) != 0; |
32090b8e | 1821 | |
300adb31 | 1822 | /* Everything starts after the ELF file header. */ |
32090b8e | 1823 | off = i_ehdrp->e_ehsize; |
300adb31 KR |
1824 | |
1825 | if (!exec_p) | |
1826 | { | |
1827 | /* Section headers. */ | |
01383fb4 | 1828 | off = align_file_position (off); |
300adb31 KR |
1829 | i_ehdrp->e_shoff = off; |
1830 | off += i_ehdrp->e_shnum * i_ehdrp->e_shentsize; | |
300adb31 KR |
1831 | off = assign_file_positions_for_symtab_and_strtabs (abfd, off); |
1832 | } | |
062189c6 | 1833 | for (i = 1; i < i_ehdrp->e_shnum; i++) |
32090b8e | 1834 | { |
062189c6 ILT |
1835 | /* The symtab and strtab sections are placed by |
1836 | assign_file_positions_for_symtab_and_strtabs. */ | |
1837 | if (i == t->symtab_section | |
1838 | || i == t->strtab_section | |
1839 | || i == t->shstrtab_section) | |
1840 | continue; | |
1841 | ||
32090b8e KR |
1842 | i_shdrp = i_shdrpp[i]; |
1843 | if (i_shdrp->sh_type == SHT_REL || i_shdrp->sh_type == SHT_RELA) | |
244ffee7 | 1844 | { |
32090b8e KR |
1845 | i_shdrp->sh_offset = -1; |
1846 | continue; | |
244ffee7 | 1847 | } |
300adb31 KR |
1848 | if (exec_p) |
1849 | { | |
1850 | bfd_vma maxpagesize = get_elf_backend_data (abfd)->maxpagesize; | |
1851 | if (maxpagesize == 0) | |
1852 | maxpagesize = 1; /* make the arithmetic work */ | |
1853 | /* This isn't necessarily going to give the best packing, if the | |
1854 | segments require padding between them, but since that isn't | |
1855 | usually the case, this'll do. */ | |
1856 | if ((i_shdrp->sh_flags & SHF_ALLOC) == 0) | |
1857 | { | |
1858 | i_shdrp->sh_offset = -1; | |
1859 | continue; | |
1860 | } | |
1861 | /* Blindly assume that the segments are ordered optimally. With | |
1862 | the default LD script, they will be. */ | |
1863 | { | |
1864 | /* need big unsigned type */ | |
1865 | bfd_vma addtl_off; | |
1866 | addtl_off = i_shdrp->sh_addr - off; | |
1867 | addtl_off = addtl_off % maxpagesize; | |
1868 | if (addtl_off) | |
1869 | { | |
1870 | off += addtl_off; | |
1871 | } | |
1872 | } | |
1873 | if (i_shdrp->sh_type == SHT_NOBITS) | |
1874 | { | |
1875 | file_ptr off2; | |
1876 | i_shdrp->sh_offset = off; | |
1877 | if (off % maxpagesize != 0) | |
1878 | off2 = maxpagesize - (off % maxpagesize); | |
1879 | if (off2 > i_shdrp->sh_size) | |
1880 | off2 = i_shdrp->sh_size; | |
1881 | off += off2; | |
1882 | } | |
1883 | } | |
32090b8e | 1884 | off = assign_file_position_for_section (i_shdrp, off); |
01383fb4 | 1885 | |
300adb31 KR |
1886 | if (exec_p |
1887 | && get_elf_backend_data(abfd)->maxpagesize > 1 | |
1888 | && i_shdrp->sh_type == SHT_PROGBITS | |
1889 | && (i_shdrp->sh_flags & SHF_ALLOC) | |
01383fb4 | 1890 | && (i_shdrp->sh_offset - i_shdrp->sh_addr) % get_elf_backend_data (abfd)->maxpagesize != 0) |
300adb31 KR |
1891 | abort (); |
1892 | } | |
1893 | if (exec_p) | |
1894 | { | |
1895 | elf_tdata (abfd)->next_file_pos = off; | |
1896 | map_program_segments (abfd); | |
1897 | off = elf_tdata (abfd)->next_file_pos; | |
1898 | ||
1899 | /* Section headers. */ | |
01383fb4 | 1900 | off = align_file_position (off); |
300adb31 KR |
1901 | i_ehdrp->e_shoff = off; |
1902 | off += i_ehdrp->e_shnum * i_ehdrp->e_shentsize; | |
1903 | ||
1904 | off = assign_file_positions_for_symtab_and_strtabs (abfd, off); | |
1905 | ||
062189c6 | 1906 | for (i = 1; i < i_ehdrp->e_shnum; i++) |
300adb31 KR |
1907 | { |
1908 | i_shdrp = i_shdrpp[i]; | |
1909 | if (i_shdrp->sh_offset + 1 == 0 | |
1910 | && i_shdrp->sh_type != SHT_REL | |
1911 | && i_shdrp->sh_type != SHT_RELA) | |
1912 | off = assign_file_position_for_section (i_shdrp, off); | |
1913 | } | |
244ffee7 | 1914 | } |
32090b8e | 1915 | elf_tdata (abfd)->next_file_pos = off; |
244ffee7 JK |
1916 | } |
1917 | ||
32090b8e KR |
1918 | static boolean |
1919 | prep_headers (abfd) | |
1920 | bfd *abfd; | |
1921 | { | |
32090b8e KR |
1922 | Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */ |
1923 | Elf_Internal_Phdr *i_phdrp = 0; /* Program header table, internal form */ | |
32090b8e | 1924 | Elf_Internal_Shdr **i_shdrp; /* Section header table, internal form */ |
32090b8e | 1925 | int count; |
32090b8e | 1926 | struct strtab *shstrtab; |
244ffee7 | 1927 | |
32090b8e KR |
1928 | i_ehdrp = elf_elfheader (abfd); |
1929 | i_shdrp = elf_elfsections (abfd); | |
244ffee7 | 1930 | |
32090b8e KR |
1931 | shstrtab = bfd_new_strtab (abfd); |
1932 | elf_shstrtab (abfd) = shstrtab; | |
244ffee7 | 1933 | |
32090b8e KR |
1934 | i_ehdrp->e_ident[EI_MAG0] = ELFMAG0; |
1935 | i_ehdrp->e_ident[EI_MAG1] = ELFMAG1; | |
1936 | i_ehdrp->e_ident[EI_MAG2] = ELFMAG2; | |
1937 | i_ehdrp->e_ident[EI_MAG3] = ELFMAG3; | |
244ffee7 | 1938 | |
32090b8e KR |
1939 | i_ehdrp->e_ident[EI_CLASS] = ELFCLASS; |
1940 | i_ehdrp->e_ident[EI_DATA] = | |
1941 | abfd->xvec->byteorder_big_p ? ELFDATA2MSB : ELFDATA2LSB; | |
1942 | i_ehdrp->e_ident[EI_VERSION] = EV_CURRENT; | |
244ffee7 | 1943 | |
32090b8e KR |
1944 | for (count = EI_PAD; count < EI_NIDENT; count++) |
1945 | i_ehdrp->e_ident[count] = 0; | |
244ffee7 | 1946 | |
32090b8e KR |
1947 | i_ehdrp->e_type = (abfd->flags & EXEC_P) ? ET_EXEC : ET_REL; |
1948 | switch (bfd_get_arch (abfd)) | |
fce36137 | 1949 | { |
32090b8e KR |
1950 | case bfd_arch_unknown: |
1951 | i_ehdrp->e_machine = EM_NONE; | |
1952 | break; | |
1953 | case bfd_arch_sparc: | |
1954 | i_ehdrp->e_machine = EM_SPARC; | |
1955 | /* start-sanitize-v9 */ | |
1956 | #if ARCH_SIZE == 64 | |
1957 | i_ehdrp->e_machine = EM_SPARC64; | |
1958 | #endif | |
1959 | /* end-sanitize-v9 */ | |
1960 | break; | |
1961 | case bfd_arch_i386: | |
1962 | i_ehdrp->e_machine = EM_386; | |
1963 | break; | |
1964 | case bfd_arch_m68k: | |
1965 | i_ehdrp->e_machine = EM_68K; | |
1966 | break; | |
1967 | case bfd_arch_m88k: | |
1968 | i_ehdrp->e_machine = EM_88K; | |
1969 | break; | |
1970 | case bfd_arch_i860: | |
1971 | i_ehdrp->e_machine = EM_860; | |
1972 | break; | |
1973 | case bfd_arch_mips: /* MIPS Rxxxx */ | |
1974 | i_ehdrp->e_machine = EM_MIPS; /* only MIPS R3000 */ | |
1975 | break; | |
1976 | case bfd_arch_hppa: | |
1977 | i_ehdrp->e_machine = EM_HPPA; | |
1978 | break; | |
1979 | /* also note that EM_M32, AT&T WE32100 is unknown to bfd */ | |
1980 | default: | |
1981 | i_ehdrp->e_machine = EM_NONE; | |
fce36137 | 1982 | } |
32090b8e KR |
1983 | i_ehdrp->e_version = EV_CURRENT; |
1984 | i_ehdrp->e_ehsize = sizeof (Elf_External_Ehdr); | |
244ffee7 | 1985 | |
32090b8e KR |
1986 | /* no program header, for now. */ |
1987 | i_ehdrp->e_phoff = 0; | |
1988 | i_ehdrp->e_phentsize = 0; | |
1989 | i_ehdrp->e_phnum = 0; | |
244ffee7 | 1990 | |
32090b8e KR |
1991 | /* each bfd section is section header entry */ |
1992 | i_ehdrp->e_entry = bfd_get_start_address (abfd); | |
1993 | i_ehdrp->e_shentsize = sizeof (Elf_External_Shdr); | |
244ffee7 | 1994 | |
32090b8e KR |
1995 | /* if we're building an executable, we'll need a program header table */ |
1996 | if (abfd->flags & EXEC_P) | |
244ffee7 | 1997 | { |
300adb31 | 1998 | /* it all happens later */ |
32090b8e KR |
1999 | #if 0 |
2000 | i_ehdrp->e_phentsize = sizeof (Elf_External_Phdr); | |
244ffee7 | 2001 | |
32090b8e KR |
2002 | /* elf_build_phdrs() returns a (NULL-terminated) array of |
2003 | Elf_Internal_Phdrs */ | |
2004 | i_phdrp = elf_build_phdrs (abfd, i_ehdrp, i_shdrp, &i_ehdrp->e_phnum); | |
2005 | i_ehdrp->e_phoff = outbase; | |
2006 | outbase += i_ehdrp->e_phentsize * i_ehdrp->e_phnum; | |
2007 | #endif | |
244ffee7 | 2008 | } |
32090b8e | 2009 | else |
244ffee7 | 2010 | { |
32090b8e KR |
2011 | i_ehdrp->e_phentsize = 0; |
2012 | i_phdrp = 0; | |
2013 | i_ehdrp->e_phoff = 0; | |
244ffee7 JK |
2014 | } |
2015 | ||
32090b8e KR |
2016 | elf_tdata (abfd)->symtab_hdr.sh_name = bfd_add_to_strtab (abfd, shstrtab, |
2017 | ".symtab"); | |
2018 | elf_tdata (abfd)->strtab_hdr.sh_name = bfd_add_to_strtab (abfd, shstrtab, | |
2019 | ".strtab"); | |
2020 | elf_tdata (abfd)->shstrtab_hdr.sh_name = bfd_add_to_strtab (abfd, shstrtab, | |
2021 | ".shstrtab"); | |
f035cc47 | 2022 | return true; |
244ffee7 JK |
2023 | } |
2024 | ||
32090b8e KR |
2025 | static void |
2026 | swap_out_syms (abfd) | |
2027 | bfd *abfd; | |
244ffee7 | 2028 | { |
32090b8e | 2029 | elf_map_symbols (abfd); |
244ffee7 | 2030 | |
32090b8e KR |
2031 | /* Dump out the symtabs. */ |
2032 | { | |
2033 | int symcount = bfd_get_symcount (abfd); | |
2034 | asymbol **syms = bfd_get_outsymbols (abfd); | |
2035 | struct strtab *stt = bfd_new_strtab (abfd); | |
2036 | Elf_Internal_Shdr *symtab_hdr; | |
2037 | Elf_Internal_Shdr *symstrtab_hdr; | |
2038 | Elf_External_Sym *outbound_syms; | |
2039 | int idx; | |
244ffee7 | 2040 | |
32090b8e KR |
2041 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
2042 | symtab_hdr->sh_type = SHT_SYMTAB; | |
2043 | symtab_hdr->sh_entsize = sizeof (Elf_External_Sym); | |
2044 | symtab_hdr->sh_size = symtab_hdr->sh_entsize * (symcount + 1); | |
2045 | symtab_hdr->sh_info = elf_num_locals (abfd) + 1; | |
244ffee7 | 2046 | |
062189c6 ILT |
2047 | /* FIXME: Systems I've checked use 4 byte alignment for .symtab, |
2048 | but it is possible that there are systems which use a different | |
2049 | alignment. */ | |
2050 | symtab_hdr->sh_addralign = 4; | |
2051 | ||
32090b8e KR |
2052 | /* see assert in elf_fake_sections that supports this: */ |
2053 | symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr; | |
2054 | symstrtab_hdr->sh_type = SHT_STRTAB; | |
244ffee7 | 2055 | |
32090b8e KR |
2056 | outbound_syms = (Elf_External_Sym *) |
2057 | bfd_alloc (abfd, (1 + symcount) * sizeof (Elf_External_Sym)); | |
2058 | /* now generate the data (for "contents") */ | |
2059 | { | |
2060 | /* Fill in zeroth symbol and swap it out. */ | |
2061 | Elf_Internal_Sym sym; | |
2062 | sym.st_name = 0; | |
2063 | sym.st_value = 0; | |
2064 | sym.st_size = 0; | |
2065 | sym.st_info = 0; | |
2066 | sym.st_other = 0; | |
2067 | sym.st_shndx = SHN_UNDEF; | |
2068 | elf_swap_symbol_out (abfd, &sym, outbound_syms); | |
244ffee7 | 2069 | } |
32090b8e KR |
2070 | for (idx = 0; idx < symcount; idx++) |
2071 | { | |
2072 | Elf_Internal_Sym sym; | |
2073 | bfd_vma value = syms[idx]->value; | |
244ffee7 | 2074 | |
32090b8e KR |
2075 | if (syms[idx]->flags & BSF_SECTION_SYM) |
2076 | /* Section symbols have no names. */ | |
2077 | sym.st_name = 0; | |
2078 | else | |
2079 | sym.st_name = bfd_add_to_strtab (abfd, stt, syms[idx]->name); | |
244ffee7 | 2080 | |
32090b8e | 2081 | if (bfd_is_com_section (syms[idx]->section)) |
244ffee7 | 2082 | { |
32090b8e KR |
2083 | /* ELF common symbols put the alignment into the `value' field, |
2084 | and the size into the `size' field. This is backwards from | |
2085 | how BFD handles it, so reverse it here. */ | |
2086 | sym.st_size = value; | |
2087 | /* Should retrieve this from somewhere... */ | |
2088 | sym.st_value = 16; | |
2089 | sym.st_shndx = SHN_COMMON; | |
244ffee7 JK |
2090 | } |
2091 | else | |
2092 | { | |
32090b8e | 2093 | asection *sec = syms[idx]->section; |
e74034d8 | 2094 | elf_symbol_type *type_ptr; |
32090b8e | 2095 | int shndx; |
244ffee7 | 2096 | |
32090b8e KR |
2097 | if (sec->output_section) |
2098 | { | |
2099 | value += sec->output_offset; | |
2100 | sec = sec->output_section; | |
2101 | } | |
2102 | value += sec->vma; | |
2103 | sym.st_value = value; | |
e74034d8 KR |
2104 | type_ptr = elf_symbol_from (abfd, syms[idx]); |
2105 | sym.st_size = type_ptr ? type_ptr->internal_elf_sym.st_size : 0; | |
32090b8e KR |
2106 | sym.st_shndx = shndx = elf_section_from_bfd_section (abfd, sec); |
2107 | if (shndx == -1) | |
2108 | { | |
2109 | asection *sec2; | |
2110 | /* Writing this would be a hell of a lot easier if we had | |
2111 | some decent documentation on bfd, and knew what to expect | |
2112 | of the library, and what to demand of applications. For | |
2113 | example, it appears that `objcopy' might not set the | |
2114 | section of a symbol to be a section that is actually in | |
2115 | the output file. */ | |
2116 | sec2 = bfd_get_section_by_name (abfd, sec->name); | |
2117 | assert (sec2 != 0); | |
2118 | sym.st_shndx = shndx = elf_section_from_bfd_section (abfd, sec2); | |
2119 | assert (shndx != -1); | |
2120 | } | |
2121 | } | |
244ffee7 | 2122 | |
32090b8e KR |
2123 | if (bfd_is_com_section (syms[idx]->section)) |
2124 | sym.st_info = ELF_ST_INFO (STB_GLOBAL, STT_NOTYPE); | |
2125 | else if (syms[idx]->section == &bfd_und_section) | |
2126 | sym.st_info = ELF_ST_INFO (STB_GLOBAL, STT_NOTYPE); | |
32090b8e KR |
2127 | else if (syms[idx]->flags & BSF_SECTION_SYM) |
2128 | sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION); | |
2129 | else if (syms[idx]->flags & BSF_FILE) | |
2130 | sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE); | |
d24928c0 | 2131 | else |
32090b8e | 2132 | { |
d24928c0 KR |
2133 | int bind = STB_LOCAL; |
2134 | int type = STT_OBJECT; | |
2135 | unsigned int flags = syms[idx]->flags; | |
2136 | ||
2137 | if (flags & BSF_LOCAL) | |
2138 | bind = STB_LOCAL; | |
2139 | else if (flags & BSF_WEAK) | |
2140 | bind = STB_WEAK; | |
2141 | else if (flags & BSF_GLOBAL) | |
2142 | bind = STB_GLOBAL; | |
2143 | ||
2144 | if (flags & BSF_FUNCTION) | |
2145 | type = STT_FUNC; | |
2146 | ||
2147 | sym.st_info = ELF_ST_INFO (bind, type); | |
32090b8e | 2148 | } |
244ffee7 | 2149 | |
32090b8e KR |
2150 | sym.st_other = 0; |
2151 | elf_swap_symbol_out (abfd, &sym, | |
d24928c0 KR |
2152 | (outbound_syms |
2153 | + elf_sym_extra (abfd)[idx].elf_sym_num)); | |
32090b8e KR |
2154 | } |
2155 | ||
2156 | symtab_hdr->contents = (PTR) outbound_syms; | |
2157 | symstrtab_hdr->contents = (PTR) stt->tab; | |
2158 | symstrtab_hdr->sh_size = stt->length; | |
2159 | symstrtab_hdr->sh_type = SHT_STRTAB; | |
2160 | ||
2161 | symstrtab_hdr->sh_flags = 0; | |
2162 | symstrtab_hdr->sh_addr = 0; | |
2163 | symstrtab_hdr->sh_entsize = 0; | |
2164 | symstrtab_hdr->sh_link = 0; | |
2165 | symstrtab_hdr->sh_info = 0; | |
062189c6 | 2166 | symstrtab_hdr->sh_addralign = 1; |
32090b8e KR |
2167 | symstrtab_hdr->size = 0; |
2168 | } | |
2169 | ||
2170 | /* put the strtab out too... */ | |
2171 | { | |
2172 | Elf_Internal_Shdr *this_hdr; | |
2173 | ||
2174 | this_hdr = &elf_tdata(abfd)->shstrtab_hdr; | |
2175 | this_hdr->contents = (PTR) elf_shstrtab (abfd)->tab; | |
2176 | this_hdr->sh_size = elf_shstrtab (abfd)->length; | |
2177 | this_hdr->sh_type = SHT_STRTAB; | |
2178 | this_hdr->sh_flags = 0; | |
2179 | this_hdr->sh_addr = 0; | |
2180 | this_hdr->sh_entsize = 0; | |
062189c6 | 2181 | this_hdr->sh_addralign = 1; |
32090b8e KR |
2182 | this_hdr->size = 0; |
2183 | } | |
244ffee7 JK |
2184 | } |
2185 | ||
32090b8e KR |
2186 | static boolean |
2187 | write_shdrs_and_ehdr (abfd) | |
2188 | bfd *abfd; | |
244ffee7 | 2189 | { |
32090b8e KR |
2190 | Elf_External_Ehdr x_ehdr; /* Elf file header, external form */ |
2191 | Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */ | |
32090b8e KR |
2192 | Elf_External_Shdr *x_shdrp; /* Section header table, external form */ |
2193 | Elf_Internal_Shdr **i_shdrp; /* Section header table, internal form */ | |
32090b8e | 2194 | int count; |
32090b8e | 2195 | struct strtab *shstrtab; |
244ffee7 | 2196 | |
32090b8e KR |
2197 | i_ehdrp = elf_elfheader (abfd); |
2198 | i_shdrp = elf_elfsections (abfd); | |
2199 | shstrtab = elf_shstrtab (abfd); | |
2200 | ||
2201 | /* swap the header before spitting it out... */ | |
2202 | ||
2203 | #if DEBUG & 1 | |
2204 | elf_debug_file (i_ehdrp); | |
244ffee7 | 2205 | #endif |
32090b8e KR |
2206 | elf_swap_ehdr_out (abfd, i_ehdrp, &x_ehdr); |
2207 | bfd_seek (abfd, (file_ptr) 0, SEEK_SET); | |
2208 | bfd_write ((PTR) & x_ehdr, sizeof (x_ehdr), 1, abfd); | |
244ffee7 | 2209 | |
32090b8e KR |
2210 | /* at this point we've concocted all the ELF sections... */ |
2211 | x_shdrp = (Elf_External_Shdr *) | |
2212 | bfd_alloc (abfd, sizeof (*x_shdrp) * (i_ehdrp->e_shnum)); | |
2213 | if (!x_shdrp) | |
2214 | { | |
2215 | bfd_error = no_memory; | |
2216 | return false; | |
2217 | } | |
2218 | ||
2219 | for (count = 0; count < i_ehdrp->e_shnum; count++) | |
2220 | { | |
2221 | #if DEBUG & 2 | |
2222 | elf_debug_section (shstrtab->tab + i_shdrp[count]->sh_name, count, | |
2223 | i_shdrp[count]); | |
244ffee7 | 2224 | #endif |
32090b8e KR |
2225 | elf_swap_shdr_out (abfd, i_shdrp[count], x_shdrp + count); |
2226 | } | |
2227 | bfd_seek (abfd, (file_ptr) i_ehdrp->e_shoff, SEEK_SET); | |
2228 | bfd_write ((PTR) x_shdrp, sizeof (*x_shdrp), i_ehdrp->e_shnum, abfd); | |
2229 | /* need to dump the string table too... */ | |
244ffee7 | 2230 | |
32090b8e KR |
2231 | return true; |
2232 | } | |
244ffee7 | 2233 | |
32090b8e KR |
2234 | static void |
2235 | assign_file_positions_for_relocs (abfd) | |
2236 | bfd *abfd; | |
2237 | { | |
2238 | file_ptr off = elf_tdata(abfd)->next_file_pos; | |
2239 | int i; | |
2240 | Elf_Internal_Shdr **shdrpp = elf_elfsections (abfd); | |
2241 | Elf_Internal_Shdr *shdrp; | |
062189c6 | 2242 | for (i = 1; i < elf_elfheader(abfd)->e_shnum; i++) |
32090b8e KR |
2243 | { |
2244 | shdrp = shdrpp[i]; | |
2245 | if (shdrp->sh_type != SHT_REL && shdrp->sh_type != SHT_RELA) | |
2246 | continue; | |
01383fb4 | 2247 | off = align_file_position (off); |
32090b8e KR |
2248 | off = assign_file_position_for_section (shdrp, off); |
2249 | } | |
2250 | elf_tdata(abfd)->next_file_pos = off; | |
2251 | } | |
244ffee7 | 2252 | |
32090b8e KR |
2253 | boolean |
2254 | DEFUN (NAME(bfd_elf,write_object_contents), (abfd), bfd * abfd) | |
2255 | { | |
062189c6 | 2256 | struct elf_backend_data *bed = get_elf_backend_data (abfd); |
32090b8e KR |
2257 | Elf_Internal_Ehdr *i_ehdrp; |
2258 | Elf_Internal_Shdr **i_shdrp; | |
2259 | int count; | |
244ffee7 | 2260 | |
32090b8e KR |
2261 | if (abfd->output_has_begun == false) |
2262 | { | |
32090b8e | 2263 | prep_headers (abfd); |
32090b8e | 2264 | elf_compute_section_file_positions (abfd); |
32090b8e KR |
2265 | abfd->output_has_begun = true; |
2266 | } | |
244ffee7 | 2267 | |
32090b8e KR |
2268 | i_shdrp = elf_elfsections (abfd); |
2269 | i_ehdrp = elf_elfheader (abfd); | |
244ffee7 | 2270 | |
32090b8e | 2271 | bfd_map_over_sections (abfd, write_relocs, (PTR) 0); |
32090b8e | 2272 | assign_file_positions_for_relocs (abfd); |
244ffee7 | 2273 | |
32090b8e | 2274 | /* After writing the headers, we need to write the sections too... */ |
062189c6 | 2275 | for (count = 1; count < i_ehdrp->e_shnum; count++) |
e621c5cc | 2276 | { |
e621c5cc ILT |
2277 | if (bed->elf_backend_section_processing) |
2278 | (*bed->elf_backend_section_processing) (abfd, i_shdrp[count]); | |
2279 | if (i_shdrp[count]->contents) | |
2280 | { | |
2281 | bfd_seek (abfd, i_shdrp[count]->sh_offset, SEEK_SET); | |
2282 | bfd_write (i_shdrp[count]->contents, i_shdrp[count]->sh_size, 1, | |
2283 | abfd); | |
2284 | } | |
2285 | } | |
062189c6 ILT |
2286 | |
2287 | if (bed->elf_backend_final_write_processing) | |
2288 | (*bed->elf_backend_final_write_processing) (abfd); | |
2289 | ||
32090b8e KR |
2290 | return write_shdrs_and_ehdr (abfd); |
2291 | } | |
244ffee7 | 2292 | |
32090b8e KR |
2293 | /* Given an index of a section, retrieve a pointer to it. Note |
2294 | that for our purposes, sections are indexed by {1, 2, ...} with | |
2295 | 0 being an illegal index. */ | |
244ffee7 | 2296 | |
32090b8e KR |
2297 | /* In the original, each ELF section went into exactly one BFD |
2298 | section. This doesn't really make sense, so we need a real mapping. | |
2299 | The mapping has to hide in the Elf_Internal_Shdr since asection | |
2300 | doesn't have anything like a tdata field... */ | |
244ffee7 | 2301 | |
32090b8e KR |
2302 | static struct sec * |
2303 | DEFUN (section_from_elf_index, (abfd, index), | |
2304 | bfd * abfd AND | |
2305 | int index) | |
2306 | { | |
2307 | /* @@ Is bfd_com_section really correct in all the places it could | |
2308 | be returned from this routine? */ | |
244ffee7 | 2309 | |
32090b8e KR |
2310 | if (index == SHN_ABS) |
2311 | return &bfd_com_section; /* not abs? */ | |
2312 | if (index == SHN_COMMON) | |
2313 | return &bfd_com_section; | |
244ffee7 | 2314 | |
32090b8e KR |
2315 | if (index > elf_elfheader (abfd)->e_shnum) |
2316 | return 0; | |
244ffee7 JK |
2317 | |
2318 | { | |
32090b8e | 2319 | Elf_Internal_Shdr *hdr = elf_elfsections (abfd)[index]; |
244ffee7 | 2320 | |
32090b8e | 2321 | switch (hdr->sh_type) |
244ffee7 | 2322 | { |
32090b8e KR |
2323 | /* ELF sections that map to BFD sections */ |
2324 | case SHT_PROGBITS: | |
2325 | case SHT_NOBITS: | |
2326 | if (!hdr->rawdata) | |
2327 | bfd_section_from_shdr (abfd, index); | |
2328 | return (struct sec *) hdr->rawdata; | |
244ffee7 | 2329 | |
32090b8e KR |
2330 | default: |
2331 | return (struct sec *) &bfd_abs_section; | |
244ffee7 | 2332 | } |
244ffee7 | 2333 | } |
32090b8e | 2334 | } |
244ffee7 | 2335 | |
32090b8e KR |
2336 | /* given a section, search the header to find them... */ |
2337 | static int | |
2338 | DEFUN (elf_section_from_bfd_section, (abfd, asect), | |
2339 | bfd * abfd AND | |
2340 | struct sec *asect) | |
2341 | { | |
2342 | Elf_Internal_Shdr **i_shdrp = elf_elfsections (abfd); | |
2343 | int index; | |
2344 | Elf_Internal_Shdr *hdr; | |
2345 | int maxindex = elf_elfheader (abfd)->e_shnum; | |
244ffee7 | 2346 | |
32090b8e KR |
2347 | if (asect == &bfd_abs_section) |
2348 | return SHN_ABS; | |
2349 | if (asect == &bfd_com_section) | |
2350 | return SHN_COMMON; | |
2351 | if (asect == &bfd_und_section) | |
2352 | return SHN_UNDEF; | |
244ffee7 | 2353 | |
32090b8e KR |
2354 | for (index = 0; index < maxindex; index++) |
2355 | { | |
2356 | hdr = i_shdrp[index]; | |
2357 | switch (hdr->sh_type) | |
2358 | { | |
2359 | /* ELF sections that map to BFD sections */ | |
2360 | case SHT_PROGBITS: | |
2361 | case SHT_NOBITS: | |
e621c5cc | 2362 | case SHT_NOTE: |
32090b8e KR |
2363 | if (hdr->rawdata) |
2364 | { | |
2365 | if (((struct sec *) (hdr->rawdata)) == asect) | |
2366 | return index; | |
2367 | } | |
2368 | break; | |
01383fb4 KR |
2369 | |
2370 | case SHT_STRTAB: | |
2371 | /* fix_up_strtabs will generate STRTAB sections with names | |
2372 | of .stab*str. */ | |
2373 | if (!strncmp (asect->name, ".stab", 5) | |
2374 | && !strcmp ("str", asect->name + strlen (asect->name) - 3)) | |
2375 | { | |
2376 | if (hdr->rawdata) | |
2377 | { | |
2378 | if (((struct sec *) (hdr->rawdata)) == asect) | |
2379 | return index; | |
2380 | } | |
2381 | break; | |
2382 | } | |
2383 | /* FALL THROUGH */ | |
32090b8e | 2384 | default: |
e621c5cc ILT |
2385 | { |
2386 | struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
2387 | ||
2388 | if (bed->elf_backend_section_from_bfd_section) | |
f035cc47 ILT |
2389 | { |
2390 | int retval; | |
2391 | ||
2392 | retval = index; | |
2393 | if ((*bed->elf_backend_section_from_bfd_section) | |
2394 | (abfd, hdr, asect, &retval)) | |
2395 | return retval; | |
2396 | } | |
e621c5cc | 2397 | } |
32090b8e KR |
2398 | break; |
2399 | } | |
2400 | } | |
2401 | return -1; | |
2402 | } | |
244ffee7 | 2403 | |
32090b8e KR |
2404 | /* given a symbol, return the bfd index for that symbol. */ |
2405 | static int | |
2406 | DEFUN (elf_symbol_from_bfd_symbol, (abfd, asym_ptr_ptr), | |
2407 | bfd * abfd AND | |
2408 | struct symbol_cache_entry **asym_ptr_ptr) | |
2409 | { | |
2410 | struct symbol_cache_entry *asym_ptr = *asym_ptr_ptr; | |
32090b8e | 2411 | int idx; |
d24928c0 | 2412 | flagword flags = asym_ptr->flags; |
32090b8e | 2413 | |
d24928c0 KR |
2414 | /* When gas creates relocations against local labels, it creates its |
2415 | own symbol for the section, but does put the symbol into the | |
e621c5cc ILT |
2416 | symbol chain, so udata is 0. When the linker is generating |
2417 | relocatable output, this section symbol may be for one of the | |
2418 | input sections rather than the output section. */ | |
d24928c0 KR |
2419 | if (asym_ptr->udata == (PTR) 0 |
2420 | && (flags & BSF_SECTION_SYM) | |
e621c5cc ILT |
2421 | && asym_ptr->section) |
2422 | { | |
2423 | int indx; | |
2424 | ||
2425 | if (asym_ptr->section->output_section != NULL) | |
2426 | indx = asym_ptr->section->output_section->index; | |
2427 | else | |
2428 | indx = asym_ptr->section->index; | |
2429 | if (elf_section_syms (abfd)[indx]) | |
2430 | asym_ptr->udata = elf_section_syms (abfd)[indx]->udata; | |
01383fb4 | 2431 | } |
e621c5cc | 2432 | |
d24928c0 KR |
2433 | if (asym_ptr->udata) |
2434 | idx = ((Elf_Sym_Extra *)asym_ptr->udata)->elf_sym_num; | |
2435 | else | |
32090b8e | 2436 | { |
32090b8e KR |
2437 | abort (); |
2438 | } | |
244ffee7 | 2439 | |
32090b8e | 2440 | #if DEBUG & 4 |
244ffee7 | 2441 | { |
244ffee7 | 2442 | |
32090b8e | 2443 | fprintf (stderr, |
d24928c0 KR |
2444 | "elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx %s\n", |
2445 | (long) asym_ptr, asym_ptr->name, idx, flags, elf_symbol_flags (flags)); | |
32090b8e KR |
2446 | fflush (stderr); |
2447 | } | |
2448 | #endif | |
2449 | ||
2450 | return idx; | |
2451 | } | |
2452 | ||
2453 | static boolean | |
2454 | DEFUN (elf_slurp_symbol_table, (abfd, symptrs), | |
2455 | bfd * abfd AND | |
2456 | asymbol ** symptrs) /* Buffer for generated bfd symbols */ | |
2457 | { | |
2458 | Elf_Internal_Shdr *hdr = &elf_tdata(abfd)->symtab_hdr; | |
2459 | int symcount; /* Number of external ELF symbols */ | |
2460 | int i; | |
2461 | elf_symbol_type *sym; /* Pointer to current bfd symbol */ | |
2462 | elf_symbol_type *symbase; /* Buffer for generated bfd symbols */ | |
2463 | Elf_Internal_Sym i_sym; | |
2464 | Elf_External_Sym *x_symp; | |
2465 | ||
2466 | /* this is only valid because there is only one symtab... */ | |
2467 | /* FIXME: This is incorrect, there may also be a dynamic symbol | |
2468 | table which is a subset of the full symbol table. We either need | |
2469 | to be prepared to read both (and merge them) or ensure that we | |
2470 | only read the full symbol table. Currently we only get called to | |
2471 | read the full symbol table. -fnf */ | |
2472 | if (bfd_get_outsymbols (abfd) != NULL) | |
244ffee7 | 2473 | { |
32090b8e | 2474 | return true; |
244ffee7 | 2475 | } |
244ffee7 | 2476 | |
32090b8e KR |
2477 | /* Read each raw ELF symbol, converting from external ELF form to |
2478 | internal ELF form, and then using the information to create a | |
2479 | canonical bfd symbol table entry. | |
244ffee7 | 2480 | |
32090b8e KR |
2481 | Note that we allocate the initial bfd canonical symbol buffer |
2482 | based on a one-to-one mapping of the ELF symbols to canonical | |
2483 | symbols. We actually use all the ELF symbols, so there will be no | |
2484 | space left over at the end. When we have all the symbols, we | |
2485 | build the caller's pointer vector. */ | |
244ffee7 | 2486 | |
32090b8e KR |
2487 | if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) == -1) |
2488 | { | |
2489 | bfd_error = system_call_error; | |
2490 | return false; | |
2491 | } | |
244ffee7 | 2492 | |
32090b8e KR |
2493 | symcount = hdr->sh_size / sizeof (Elf_External_Sym); |
2494 | symbase = (elf_symbol_type *) bfd_zalloc (abfd, symcount * sizeof (elf_symbol_type)); | |
2495 | sym = symbase; | |
244ffee7 | 2496 | |
32090b8e KR |
2497 | /* Temporarily allocate room for the raw ELF symbols. */ |
2498 | x_symp = (Elf_External_Sym *) bfd_xmalloc (symcount * sizeof (Elf_External_Sym)); | |
244ffee7 | 2499 | |
32090b8e KR |
2500 | if (bfd_read ((PTR) x_symp, sizeof (Elf_External_Sym), symcount, abfd) |
2501 | != symcount * sizeof (Elf_External_Sym)) | |
244ffee7 | 2502 | { |
32090b8e KR |
2503 | free ((PTR) x_symp); |
2504 | bfd_error = system_call_error; | |
2505 | return false; | |
244ffee7 | 2506 | } |
32090b8e KR |
2507 | /* Skip first symbol, which is a null dummy. */ |
2508 | for (i = 1; i < symcount; i++) | |
244ffee7 | 2509 | { |
32090b8e KR |
2510 | elf_swap_symbol_in (abfd, x_symp + i, &i_sym); |
2511 | memcpy (&sym->internal_elf_sym, &i_sym, sizeof (Elf_Internal_Sym)); | |
e621c5cc | 2512 | #ifdef ELF_KEEP_EXTSYM |
32090b8e | 2513 | memcpy (&sym->native_elf_sym, x_symp + i, sizeof (Elf_External_Sym)); |
e621c5cc | 2514 | #endif |
32090b8e | 2515 | sym->symbol.the_bfd = abfd; |
244ffee7 | 2516 | |
32090b8e KR |
2517 | sym->symbol.name = elf_string_from_elf_section (abfd, hdr->sh_link, |
2518 | i_sym.st_name); | |
244ffee7 | 2519 | |
32090b8e | 2520 | sym->symbol.value = i_sym.st_value; |
244ffee7 | 2521 | |
32090b8e KR |
2522 | if (i_sym.st_shndx > 0 && i_sym.st_shndx < SHN_LORESERV) |
2523 | { | |
2524 | sym->symbol.section = section_from_elf_index (abfd, i_sym.st_shndx); | |
2525 | } | |
2526 | else if (i_sym.st_shndx == SHN_ABS) | |
2527 | { | |
2528 | sym->symbol.section = &bfd_abs_section; | |
2529 | } | |
2530 | else if (i_sym.st_shndx == SHN_COMMON) | |
2531 | { | |
2532 | sym->symbol.section = &bfd_com_section; | |
2533 | /* Elf puts the alignment into the `value' field, and the size | |
2534 | into the `size' field. BFD wants to see the size in the | |
2535 | value field, and doesn't care (at the moment) about the | |
2536 | alignment. */ | |
2537 | sym->symbol.value = i_sym.st_size; | |
2538 | } | |
2539 | else if (i_sym.st_shndx == SHN_UNDEF) | |
2540 | { | |
2541 | sym->symbol.section = &bfd_und_section; | |
2542 | } | |
2543 | else | |
2544 | sym->symbol.section = &bfd_abs_section; | |
244ffee7 | 2545 | |
32090b8e | 2546 | sym->symbol.value -= sym->symbol.section->vma; |
244ffee7 | 2547 | |
32090b8e | 2548 | switch (ELF_ST_BIND (i_sym.st_info)) |
244ffee7 | 2549 | { |
32090b8e KR |
2550 | case STB_LOCAL: |
2551 | sym->symbol.flags |= BSF_LOCAL; | |
2552 | break; | |
2553 | case STB_GLOBAL: | |
d24928c0 | 2554 | sym->symbol.flags |= BSF_GLOBAL; |
32090b8e KR |
2555 | break; |
2556 | case STB_WEAK: | |
2557 | sym->symbol.flags |= BSF_WEAK; | |
2558 | break; | |
2559 | } | |
244ffee7 | 2560 | |
32090b8e KR |
2561 | switch (ELF_ST_TYPE (i_sym.st_info)) |
2562 | { | |
2563 | case STT_SECTION: | |
2564 | sym->symbol.flags |= BSF_SECTION_SYM | BSF_DEBUGGING; | |
2565 | break; | |
2566 | case STT_FILE: | |
2567 | sym->symbol.flags |= BSF_FILE | BSF_DEBUGGING; | |
2568 | break; | |
2569 | case STT_FUNC: | |
2570 | sym->symbol.flags |= BSF_FUNCTION; | |
2571 | break; | |
244ffee7 | 2572 | } |
300adb31 | 2573 | |
e621c5cc ILT |
2574 | /* Do some backend-specific processing on this symbol. */ |
2575 | { | |
2576 | struct elf_backend_data *ebd = get_elf_backend_data (abfd); | |
2577 | if (ebd->elf_backend_symbol_processing) | |
2578 | (*ebd->elf_backend_symbol_processing) (abfd, &sym->symbol); | |
2579 | } | |
244ffee7 | 2580 | |
32090b8e | 2581 | sym++; |
244ffee7 JK |
2582 | } |
2583 | ||
e621c5cc ILT |
2584 | /* Do some backend-specific processing on this symbol table. */ |
2585 | { | |
2586 | struct elf_backend_data *ebd = get_elf_backend_data (abfd); | |
2587 | if (ebd->elf_backend_symbol_table_processing) | |
2588 | (*ebd->elf_backend_symbol_table_processing) (abfd, symbase, symcount); | |
2589 | } | |
244ffee7 | 2590 | |
e621c5cc | 2591 | /* We rely on the zalloc to clear out the final symbol entry. */ |
244ffee7 | 2592 | |
32090b8e KR |
2593 | bfd_get_symcount (abfd) = symcount = sym - symbase; |
2594 | ||
2595 | /* Fill in the user's symbol pointer vector if needed. */ | |
2596 | if (symptrs) | |
244ffee7 | 2597 | { |
32090b8e KR |
2598 | sym = symbase; |
2599 | while (symcount-- > 0) | |
244ffee7 | 2600 | { |
32090b8e KR |
2601 | *symptrs++ = &sym->symbol; |
2602 | sym++; | |
244ffee7 | 2603 | } |
32090b8e | 2604 | *symptrs = 0; /* Final null pointer */ |
244ffee7 JK |
2605 | } |
2606 | ||
2607 | return true; | |
2608 | } | |
2609 | ||
32090b8e | 2610 | /* Return the number of bytes required to hold the symtab vector. |
244ffee7 | 2611 | |
32090b8e KR |
2612 | Note that we base it on the count plus 1, since we will null terminate |
2613 | the vector allocated based on this size. However, the ELF symbol table | |
2614 | always has a dummy entry as symbol #0, so it ends up even. */ | |
244ffee7 | 2615 | |
32090b8e KR |
2616 | unsigned int |
2617 | DEFUN (elf_get_symtab_upper_bound, (abfd), bfd * abfd) | |
244ffee7 | 2618 | { |
32090b8e KR |
2619 | unsigned int symcount; |
2620 | unsigned int symtab_size = 0; | |
244ffee7 | 2621 | |
32090b8e KR |
2622 | Elf_Internal_Shdr *hdr = &elf_tdata(abfd)->symtab_hdr; |
2623 | symcount = hdr->sh_size / sizeof (Elf_External_Sym); | |
2624 | symtab_size = (symcount - 1 + 1) * (sizeof (asymbol)); | |
244ffee7 | 2625 | |
32090b8e KR |
2626 | return symtab_size; |
2627 | } | |
244ffee7 | 2628 | |
32090b8e KR |
2629 | /* |
2630 | This function return the number of bytes required to store the | |
2631 | relocation information associated with section <<sect>> | |
2632 | attached to bfd <<abfd>> | |
244ffee7 | 2633 | |
32090b8e KR |
2634 | */ |
2635 | unsigned int | |
2636 | elf_get_reloc_upper_bound (abfd, asect) | |
2637 | bfd *abfd; | |
2638 | sec_ptr asect; | |
2639 | { | |
2640 | if (asect->flags & SEC_RELOC) | |
2641 | { | |
2642 | /* either rel or rela */ | |
2643 | return elf_section_data(asect)->rel_hdr.sh_size; | |
2644 | } | |
2645 | else | |
2646 | return 0; | |
244ffee7 JK |
2647 | } |
2648 | ||
32090b8e KR |
2649 | static boolean |
2650 | DEFUN (elf_slurp_reloca_table, (abfd, asect, symbols), | |
244ffee7 | 2651 | bfd * abfd AND |
32090b8e KR |
2652 | sec_ptr asect AND |
2653 | asymbol ** symbols) | |
244ffee7 | 2654 | { |
32090b8e KR |
2655 | Elf_External_Rela *native_relocs; |
2656 | arelent *reloc_cache; | |
2657 | arelent *cache_ptr; | |
244ffee7 | 2658 | |
32090b8e | 2659 | unsigned int idx; |
244ffee7 | 2660 | |
32090b8e KR |
2661 | if (asect->relocation) |
2662 | return true; | |
2663 | if (asect->reloc_count == 0) | |
2664 | return true; | |
2665 | if (asect->flags & SEC_CONSTRUCTOR) | |
2666 | return true; | |
244ffee7 | 2667 | |
32090b8e KR |
2668 | bfd_seek (abfd, asect->rel_filepos, SEEK_SET); |
2669 | native_relocs = (Elf_External_Rela *) | |
2670 | bfd_alloc (abfd, asect->reloc_count * sizeof (Elf_External_Rela)); | |
2671 | bfd_read ((PTR) native_relocs, | |
2672 | sizeof (Elf_External_Rela), asect->reloc_count, abfd); | |
244ffee7 | 2673 | |
32090b8e KR |
2674 | reloc_cache = (arelent *) |
2675 | bfd_alloc (abfd, (size_t) (asect->reloc_count * sizeof (arelent))); | |
2676 | ||
2677 | if (!reloc_cache) | |
6a3eb9b6 | 2678 | { |
32090b8e KR |
2679 | bfd_error = no_memory; |
2680 | return false; | |
6a3eb9b6 | 2681 | } |
244ffee7 | 2682 | |
32090b8e KR |
2683 | for (idx = 0; idx < asect->reloc_count; idx++) |
2684 | { | |
32090b8e KR |
2685 | Elf_Internal_Rela dst; |
2686 | Elf_External_Rela *src; | |
244ffee7 | 2687 | |
32090b8e KR |
2688 | cache_ptr = reloc_cache + idx; |
2689 | src = native_relocs + idx; | |
2690 | elf_swap_reloca_in (abfd, src, &dst); | |
244ffee7 | 2691 | |
d24928c0 | 2692 | #ifdef RELOC_PROCESSING |
32090b8e KR |
2693 | RELOC_PROCESSING (cache_ptr, &dst, symbols, abfd, asect); |
2694 | #else | |
32090b8e KR |
2695 | if (asect->flags & SEC_RELOC) |
2696 | { | |
2697 | /* relocatable, so the offset is off of the section */ | |
2698 | cache_ptr->address = dst.r_offset + asect->vma; | |
2699 | } | |
2700 | else | |
2701 | { | |
2702 | /* non-relocatable, so the offset a virtual address */ | |
2703 | cache_ptr->address = dst.r_offset; | |
2704 | } | |
7b8106b4 ILT |
2705 | |
2706 | /* ELF_R_SYM(dst.r_info) is the symbol table offset. An offset | |
2707 | of zero points to the dummy symbol, which was not read into | |
2708 | the symbol table SYMBOLS. */ | |
2709 | if (ELF_R_SYM (dst.r_info) == 0) | |
2710 | cache_ptr->sym_ptr_ptr = bfd_abs_section.symbol_ptr_ptr; | |
2711 | else | |
2712 | { | |
2713 | asymbol *s; | |
2714 | ||
2715 | cache_ptr->sym_ptr_ptr = symbols + ELF_R_SYM (dst.r_info) - 1; | |
2716 | ||
2717 | /* Translate any ELF section symbol into a BFD section | |
2718 | symbol. */ | |
2719 | s = *(cache_ptr->sym_ptr_ptr); | |
2720 | if (s->flags & BSF_SECTION_SYM) | |
2721 | { | |
2722 | cache_ptr->sym_ptr_ptr = s->section->symbol_ptr_ptr; | |
2723 | s = *cache_ptr->sym_ptr_ptr; | |
2724 | if (s->name == 0 || s->name[0] == 0) | |
2725 | abort (); | |
2726 | } | |
2727 | } | |
32090b8e | 2728 | cache_ptr->addend = dst.r_addend; |
244ffee7 | 2729 | |
32090b8e KR |
2730 | /* Fill in the cache_ptr->howto field from dst.r_type */ |
2731 | { | |
2732 | struct elf_backend_data *ebd = get_elf_backend_data (abfd); | |
2733 | (*ebd->elf_info_to_howto) (abfd, cache_ptr, &dst); | |
2734 | } | |
2735 | #endif | |
2736 | } | |
244ffee7 | 2737 | |
32090b8e KR |
2738 | asect->relocation = reloc_cache; |
2739 | return true; | |
2740 | } | |
238ac6ec | 2741 | |
32090b8e KR |
2742 | #ifdef DEBUG |
2743 | static void | |
2744 | elf_debug_section (str, num, hdr) | |
2745 | char *str; | |
2746 | int num; | |
2747 | Elf_Internal_Shdr *hdr; | |
2748 | { | |
2749 | fprintf (stderr, "\nSection#%d '%s' 0x%.8lx\n", num, str, (long) hdr); | |
2750 | fprintf (stderr, | |
2751 | "sh_name = %ld\tsh_type = %ld\tsh_flags = %ld\n", | |
2752 | (long) hdr->sh_name, | |
2753 | (long) hdr->sh_type, | |
2754 | (long) hdr->sh_flags); | |
2755 | fprintf (stderr, | |
2756 | "sh_addr = %ld\tsh_offset = %ld\tsh_size = %ld\n", | |
2757 | (long) hdr->sh_addr, | |
2758 | (long) hdr->sh_offset, | |
2759 | (long) hdr->sh_size); | |
2760 | fprintf (stderr, | |
2761 | "sh_link = %ld\tsh_info = %ld\tsh_addralign = %ld\n", | |
2762 | (long) hdr->sh_link, | |
2763 | (long) hdr->sh_info, | |
2764 | (long) hdr->sh_addralign); | |
2765 | fprintf (stderr, "sh_entsize = %ld\n", | |
2766 | (long) hdr->sh_entsize); | |
2767 | fprintf (stderr, "rawdata = 0x%.8lx\n", (long) hdr->rawdata); | |
2768 | fprintf (stderr, "contents = 0x%.8lx\n", (long) hdr->contents); | |
2769 | fprintf (stderr, "size = %ld\n", (long) hdr->size); | |
2770 | fflush (stderr); | |
2771 | } | |
244ffee7 | 2772 | |
32090b8e KR |
2773 | static void |
2774 | elf_debug_file (ehdrp) | |
2775 | Elf_Internal_Ehdr *ehdrp; | |
2776 | { | |
2777 | fprintf (stderr, "e_entry = 0x%.8lx\n", (long) ehdrp->e_entry); | |
2778 | fprintf (stderr, "e_phoff = %ld\n", (long) ehdrp->e_phoff); | |
2779 | fprintf (stderr, "e_phnum = %ld\n", (long) ehdrp->e_phnum); | |
2780 | fprintf (stderr, "e_phentsize = %ld\n", (long) ehdrp->e_phentsize); | |
2781 | fprintf (stderr, "e_shoff = %ld\n", (long) ehdrp->e_shoff); | |
2782 | fprintf (stderr, "e_shnum = %ld\n", (long) ehdrp->e_shnum); | |
2783 | fprintf (stderr, "e_shentsize = %ld\n", (long) ehdrp->e_shentsize); | |
244ffee7 | 2784 | } |
32090b8e | 2785 | #endif |
244ffee7 JK |
2786 | |
2787 | static boolean | |
32090b8e | 2788 | DEFUN (elf_slurp_reloc_table, (abfd, asect, symbols), |
244ffee7 | 2789 | bfd * abfd AND |
32090b8e KR |
2790 | sec_ptr asect AND |
2791 | asymbol ** symbols) | |
244ffee7 | 2792 | { |
32090b8e KR |
2793 | Elf_External_Rel *native_relocs; |
2794 | arelent *reloc_cache; | |
2795 | arelent *cache_ptr; | |
2796 | Elf_Internal_Shdr *data_hdr; | |
2797 | ElfNAME (Off) data_off; | |
2798 | ElfNAME (Word) data_max; | |
2799 | char buf[4]; /* FIXME -- might be elf64 */ | |
244ffee7 | 2800 | |
32090b8e | 2801 | unsigned int idx; |
244ffee7 | 2802 | |
32090b8e KR |
2803 | if (asect->relocation) |
2804 | return true; | |
2805 | if (asect->reloc_count == 0) | |
2806 | return true; | |
2807 | if (asect->flags & SEC_CONSTRUCTOR) | |
2808 | return true; | |
244ffee7 | 2809 | |
32090b8e KR |
2810 | bfd_seek (abfd, asect->rel_filepos, SEEK_SET); |
2811 | native_relocs = (Elf_External_Rel *) | |
2812 | bfd_alloc (abfd, asect->reloc_count * sizeof (Elf_External_Rel)); | |
2813 | bfd_read ((PTR) native_relocs, | |
2814 | sizeof (Elf_External_Rel), asect->reloc_count, abfd); | |
244ffee7 | 2815 | |
32090b8e KR |
2816 | reloc_cache = (arelent *) |
2817 | bfd_alloc (abfd, (size_t) (asect->reloc_count * sizeof (arelent))); | |
2818 | ||
2819 | if (!reloc_cache) | |
244ffee7 | 2820 | { |
32090b8e | 2821 | bfd_error = no_memory; |
244ffee7 JK |
2822 | return false; |
2823 | } | |
2824 | ||
32090b8e KR |
2825 | /* Get the offset of the start of the segment we are relocating to read in |
2826 | the implicit addend. */ | |
2827 | data_hdr = &elf_section_data(asect)->this_hdr; | |
2828 | data_off = data_hdr->sh_offset; | |
2829 | data_max = data_hdr->sh_size - sizeof (buf) + 1; | |
244ffee7 | 2830 | |
32090b8e KR |
2831 | #if DEBUG & 2 |
2832 | elf_debug_section ("data section", -1, data_hdr); | |
2833 | #endif | |
244ffee7 | 2834 | |
32090b8e | 2835 | for (idx = 0; idx < asect->reloc_count; idx++) |
244ffee7 | 2836 | { |
32090b8e KR |
2837 | #ifdef RELOC_PROCESSING |
2838 | Elf_Internal_Rel dst; | |
2839 | Elf_External_Rel *src; | |
244ffee7 | 2840 | |
32090b8e KR |
2841 | cache_ptr = reloc_cache + idx; |
2842 | src = native_relocs + idx; | |
2843 | elf_swap_reloc_in (abfd, src, &dst); | |
244ffee7 | 2844 | |
32090b8e KR |
2845 | RELOC_PROCESSING (cache_ptr, &dst, symbols, abfd, asect); |
2846 | #else | |
2847 | Elf_Internal_Rel dst; | |
2848 | Elf_External_Rel *src; | |
6a3eb9b6 | 2849 | |
32090b8e KR |
2850 | cache_ptr = reloc_cache + idx; |
2851 | src = native_relocs + idx; | |
2852 | ||
2853 | elf_swap_reloc_in (abfd, src, &dst); | |
2854 | ||
2855 | if (asect->flags & SEC_RELOC) | |
244ffee7 | 2856 | { |
32090b8e KR |
2857 | /* relocatable, so the offset is off of the section */ |
2858 | cache_ptr->address = dst.r_offset + asect->vma; | |
244ffee7 | 2859 | } |
32090b8e | 2860 | else |
244ffee7 | 2861 | { |
32090b8e KR |
2862 | /* non-relocatable, so the offset a virtual address */ |
2863 | cache_ptr->address = dst.r_offset; | |
244ffee7 | 2864 | } |
7b8106b4 ILT |
2865 | |
2866 | /* ELF_R_SYM(dst.r_info) is the symbol table offset. An offset | |
2867 | of zero points to the dummy symbol, which was not read into | |
2868 | the symbol table SYMBOLS. */ | |
2869 | if (ELF_R_SYM (dst.r_info) == 0) | |
2870 | cache_ptr->sym_ptr_ptr = bfd_abs_section.symbol_ptr_ptr; | |
2871 | else | |
2872 | { | |
2873 | asymbol *s; | |
2874 | ||
2875 | cache_ptr->sym_ptr_ptr = symbols + ELF_R_SYM (dst.r_info) - 1; | |
2876 | ||
2877 | /* Translate any ELF section symbol into a BFD section | |
2878 | symbol. */ | |
2879 | s = *(cache_ptr->sym_ptr_ptr); | |
2880 | if (s->flags & BSF_SECTION_SYM) | |
2881 | { | |
2882 | cache_ptr->sym_ptr_ptr = s->section->symbol_ptr_ptr; | |
2883 | s = *cache_ptr->sym_ptr_ptr; | |
2884 | if (s->name == 0 || s->name[0] == 0) | |
2885 | abort (); | |
2886 | } | |
2887 | } | |
32090b8e | 2888 | BFD_ASSERT (dst.r_offset <= data_max); |
d24928c0 | 2889 | cache_ptr->addend = 0; |
244ffee7 | 2890 | |
32090b8e KR |
2891 | /* Fill in the cache_ptr->howto field from dst.r_type */ |
2892 | { | |
2893 | struct elf_backend_data *ebd = get_elf_backend_data (abfd); | |
2894 | (*ebd->elf_info_to_howto_rel) (abfd, cache_ptr, &dst); | |
2895 | } | |
2896 | #endif | |
2897 | } | |
244ffee7 | 2898 | |
32090b8e KR |
2899 | asect->relocation = reloc_cache; |
2900 | return true; | |
2901 | } | |
244ffee7 | 2902 | |
32090b8e KR |
2903 | unsigned int |
2904 | elf_canonicalize_reloc (abfd, section, relptr, symbols) | |
2905 | bfd *abfd; | |
2906 | sec_ptr section; | |
2907 | arelent **relptr; | |
2908 | asymbol **symbols; | |
2909 | { | |
2910 | arelent *tblptr = section->relocation; | |
2911 | unsigned int count = 0; | |
2912 | int use_rela_p = get_elf_backend_data (abfd)->use_rela_p; | |
2913 | ||
2914 | /* snarfed from coffcode.h */ | |
2915 | if (use_rela_p) | |
2916 | elf_slurp_reloca_table (abfd, section, symbols); | |
2917 | else | |
2918 | elf_slurp_reloc_table (abfd, section, symbols); | |
2919 | ||
2920 | tblptr = section->relocation; | |
2921 | if (!tblptr) | |
2922 | return 0; | |
2923 | ||
2924 | for (; count++ < section->reloc_count;) | |
2925 | *relptr++ = tblptr++; | |
2926 | ||
2927 | *relptr = 0; | |
2928 | return section->reloc_count; | |
2929 | } | |
2930 | ||
2931 | unsigned int | |
2932 | DEFUN (elf_get_symtab, (abfd, alocation), | |
2933 | bfd * abfd AND | |
2934 | asymbol ** alocation) | |
2935 | { | |
2936 | ||
2937 | if (!elf_slurp_symbol_table (abfd, alocation)) | |
2938 | return 0; | |
2939 | else | |
2940 | return bfd_get_symcount (abfd); | |
2941 | } | |
2942 | ||
2943 | asymbol * | |
2944 | DEFUN (elf_make_empty_symbol, (abfd), | |
2945 | bfd * abfd) | |
2946 | { | |
2947 | elf_symbol_type *newsym; | |
2948 | ||
2949 | newsym = (elf_symbol_type *) bfd_zalloc (abfd, sizeof (elf_symbol_type)); | |
2950 | if (!newsym) | |
2951 | { | |
2952 | bfd_error = no_memory; | |
2953 | return NULL; | |
2954 | } | |
2955 | else | |
2956 | { | |
2957 | newsym->symbol.the_bfd = abfd; | |
2958 | return &newsym->symbol; | |
244ffee7 | 2959 | } |
32090b8e | 2960 | } |
244ffee7 | 2961 | |
32090b8e KR |
2962 | void |
2963 | DEFUN (elf_get_symbol_info, (ignore_abfd, symbol, ret), | |
2964 | bfd * ignore_abfd AND | |
2965 | asymbol * symbol AND | |
2966 | symbol_info * ret) | |
2967 | { | |
2968 | bfd_symbol_info (symbol, ret); | |
2969 | } | |
244ffee7 | 2970 | |
32090b8e KR |
2971 | void |
2972 | DEFUN (elf_print_symbol, (ignore_abfd, filep, symbol, how), | |
2973 | bfd * ignore_abfd AND | |
2974 | PTR filep AND | |
2975 | asymbol * symbol AND | |
2976 | bfd_print_symbol_type how) | |
2977 | { | |
2978 | FILE *file = (FILE *) filep; | |
2979 | switch (how) | |
2980 | { | |
2981 | case bfd_print_symbol_name: | |
2982 | fprintf (file, "%s", symbol->name); | |
2983 | break; | |
2984 | case bfd_print_symbol_more: | |
2985 | fprintf (file, "elf "); | |
2986 | fprintf_vma (file, symbol->value); | |
2987 | fprintf (file, " %lx", (long) symbol->flags); | |
2988 | break; | |
2989 | case bfd_print_symbol_all: | |
2990 | { | |
2991 | CONST char *section_name; | |
2992 | section_name = symbol->section ? symbol->section->name : "(*none*)"; | |
2993 | bfd_print_symbol_vandf ((PTR) file, symbol); | |
2994 | fprintf (file, " %s\t%s", | |
2995 | section_name, | |
2996 | symbol->name); | |
2997 | } | |
2998 | break; | |
2999 | } | |
244ffee7 | 3000 | |
32090b8e | 3001 | } |
244ffee7 | 3002 | |
32090b8e KR |
3003 | alent * |
3004 | DEFUN (elf_get_lineno, (ignore_abfd, symbol), | |
3005 | bfd * ignore_abfd AND | |
3006 | asymbol * symbol) | |
3007 | { | |
3008 | fprintf (stderr, "elf_get_lineno unimplemented\n"); | |
3009 | fflush (stderr); | |
3010 | BFD_FAIL (); | |
3011 | return NULL; | |
3012 | } | |
3013 | ||
3014 | boolean | |
3015 | DEFUN (elf_set_arch_mach, (abfd, arch, machine), | |
3016 | bfd * abfd AND | |
3017 | enum bfd_architecture arch AND | |
3018 | unsigned long machine) | |
3019 | { | |
3020 | /* Allow any architecture to be supported by the elf backend */ | |
3021 | switch (arch) | |
244ffee7 | 3022 | { |
32090b8e KR |
3023 | case bfd_arch_unknown: /* EM_NONE */ |
3024 | case bfd_arch_sparc: /* EM_SPARC */ | |
3025 | case bfd_arch_i386: /* EM_386 */ | |
3026 | case bfd_arch_m68k: /* EM_68K */ | |
3027 | case bfd_arch_m88k: /* EM_88K */ | |
3028 | case bfd_arch_i860: /* EM_860 */ | |
3029 | case bfd_arch_mips: /* EM_MIPS (MIPS R3000) */ | |
3030 | case bfd_arch_hppa: /* EM_HPPA (HP PA_RISC) */ | |
3031 | return bfd_default_set_arch_mach (abfd, arch, machine); | |
3032 | default: | |
3033 | return false; | |
244ffee7 | 3034 | } |
32090b8e | 3035 | } |
244ffee7 | 3036 | |
32090b8e KR |
3037 | boolean |
3038 | DEFUN (elf_find_nearest_line, (abfd, | |
3039 | section, | |
3040 | symbols, | |
3041 | offset, | |
3042 | filename_ptr, | |
3043 | functionname_ptr, | |
3044 | line_ptr), | |
3045 | bfd * abfd AND | |
3046 | asection * section AND | |
3047 | asymbol ** symbols AND | |
3048 | bfd_vma offset AND | |
3049 | CONST char **filename_ptr AND | |
3050 | CONST char **functionname_ptr AND | |
3051 | unsigned int *line_ptr) | |
3052 | { | |
3053 | return false; | |
244ffee7 JK |
3054 | } |
3055 | ||
32090b8e KR |
3056 | int |
3057 | DEFUN (elf_sizeof_headers, (abfd, reloc), | |
3058 | bfd * abfd AND | |
3059 | boolean reloc) | |
3060 | { | |
3061 | fprintf (stderr, "elf_sizeof_headers unimplemented\n"); | |
3062 | fflush (stderr); | |
3063 | BFD_FAIL (); | |
3064 | return 0; | |
3065 | } | |
244ffee7 | 3066 | |
32090b8e KR |
3067 | boolean |
3068 | DEFUN (elf_set_section_contents, (abfd, section, location, offset, count), | |
3069 | bfd * abfd AND | |
3070 | sec_ptr section AND | |
3071 | PTR location AND | |
3072 | file_ptr offset AND | |
3073 | bfd_size_type count) | |
244ffee7 | 3074 | { |
244ffee7 JK |
3075 | Elf_Internal_Shdr *hdr; |
3076 | ||
32090b8e | 3077 | if (abfd->output_has_begun == false) /* set by bfd.c handler? */ |
244ffee7 | 3078 | { |
32090b8e KR |
3079 | /* do setup calculations (FIXME) */ |
3080 | prep_headers (abfd); | |
3081 | elf_compute_section_file_positions (abfd); | |
3082 | abfd->output_has_begun = true; | |
244ffee7 | 3083 | } |
244ffee7 | 3084 | |
32090b8e | 3085 | hdr = &elf_section_data(section)->this_hdr; |
244ffee7 | 3086 | |
32090b8e KR |
3087 | if (bfd_seek (abfd, hdr->sh_offset + offset, SEEK_SET) == -1) |
3088 | return false; | |
3089 | if (bfd_write (location, 1, count, abfd) != count) | |
3090 | return false; | |
3091 | ||
3092 | return true; | |
3093 | } | |
3094 | ||
3095 | void | |
3096 | DEFUN (elf_no_info_to_howto, (abfd, cache_ptr, dst), | |
3097 | bfd * abfd AND | |
3098 | arelent * cache_ptr AND | |
3099 | Elf_Internal_Rela * dst) | |
244ffee7 | 3100 | { |
32090b8e KR |
3101 | fprintf (stderr, "elf RELA relocation support for target machine unimplemented\n"); |
3102 | fflush (stderr); | |
3103 | BFD_FAIL (); | |
244ffee7 JK |
3104 | } |
3105 | ||
32090b8e KR |
3106 | void |
3107 | DEFUN (elf_no_info_to_howto_rel, (abfd, cache_ptr, dst), | |
244ffee7 | 3108 | bfd * abfd AND |
32090b8e KR |
3109 | arelent * cache_ptr AND |
3110 | Elf_Internal_Rel * dst) | |
244ffee7 | 3111 | { |
32090b8e KR |
3112 | fprintf (stderr, "elf REL relocation support for target machine unimplemented\n"); |
3113 | fflush (stderr); | |
3114 | BFD_FAIL (); | |
3115 | } | |
244ffee7 | 3116 | |
32090b8e KR |
3117 | \f |
3118 | /* Core file support */ | |
244ffee7 | 3119 | |
32090b8e KR |
3120 | #ifdef HAVE_PROCFS /* Some core file support requires host /proc files */ |
3121 | #include <sys/procfs.h> | |
3122 | #else | |
3123 | #define bfd_prstatus(abfd, descdata, descsz, filepos) /* Define away */ | |
3124 | #define bfd_fpregset(abfd, descdata, descsz, filepos) /* Define away */ | |
3125 | #define bfd_prpsinfo(abfd, descdata, descsz, filepos) /* Define away */ | |
3126 | #endif | |
244ffee7 | 3127 | |
32090b8e | 3128 | #ifdef HAVE_PROCFS |
244ffee7 | 3129 | |
32090b8e KR |
3130 | static void |
3131 | DEFUN (bfd_prstatus, (abfd, descdata, descsz, filepos), | |
3132 | bfd * abfd AND | |
3133 | char *descdata AND | |
3134 | int descsz AND | |
3135 | long filepos) | |
3136 | { | |
3137 | asection *newsect; | |
3138 | prstatus_t *status = (prstatus_t *) 0; | |
244ffee7 | 3139 | |
32090b8e | 3140 | if (descsz == sizeof (prstatus_t)) |
244ffee7 | 3141 | { |
32090b8e KR |
3142 | newsect = bfd_make_section (abfd, ".reg"); |
3143 | newsect->_raw_size = sizeof (status->pr_reg); | |
3144 | newsect->filepos = filepos + (long) &status->pr_reg; | |
3145 | newsect->flags = SEC_ALLOC | SEC_HAS_CONTENTS; | |
3146 | newsect->alignment_power = 2; | |
3147 | if ((core_prstatus (abfd) = bfd_alloc (abfd, descsz)) != NULL) | |
3148 | { | |
3149 | memcpy (core_prstatus (abfd), descdata, descsz); | |
3150 | } | |
244ffee7 | 3151 | } |
32090b8e | 3152 | } |
244ffee7 | 3153 | |
32090b8e | 3154 | /* Stash a copy of the prpsinfo structure away for future use. */ |
244ffee7 | 3155 | |
32090b8e KR |
3156 | static void |
3157 | DEFUN (bfd_prpsinfo, (abfd, descdata, descsz, filepos), | |
3158 | bfd * abfd AND | |
3159 | char *descdata AND | |
3160 | int descsz AND | |
3161 | long filepos) | |
3162 | { | |
3163 | asection *newsect; | |
244ffee7 | 3164 | |
32090b8e KR |
3165 | if (descsz == sizeof (prpsinfo_t)) |
3166 | { | |
3167 | if ((core_prpsinfo (abfd) = bfd_alloc (abfd, descsz)) != NULL) | |
244ffee7 | 3168 | { |
32090b8e | 3169 | memcpy (core_prpsinfo (abfd), descdata, descsz); |
244ffee7 | 3170 | } |
244ffee7 | 3171 | } |
244ffee7 JK |
3172 | } |
3173 | ||
244ffee7 | 3174 | static void |
32090b8e KR |
3175 | DEFUN (bfd_fpregset, (abfd, descdata, descsz, filepos), |
3176 | bfd * abfd AND | |
3177 | char *descdata AND | |
3178 | int descsz AND | |
3179 | long filepos) | |
244ffee7 | 3180 | { |
32090b8e | 3181 | asection *newsect; |
244ffee7 | 3182 | |
32090b8e KR |
3183 | newsect = bfd_make_section (abfd, ".reg2"); |
3184 | newsect->_raw_size = descsz; | |
3185 | newsect->filepos = filepos; | |
3186 | newsect->flags = SEC_ALLOC | SEC_HAS_CONTENTS; | |
3187 | newsect->alignment_power = 2; | |
6a3eb9b6 | 3188 | } |
244ffee7 | 3189 | |
32090b8e KR |
3190 | #endif /* HAVE_PROCFS */ |
3191 | ||
3192 | /* Return a pointer to the args (including the command name) that were | |
3193 | seen by the program that generated the core dump. Note that for | |
3194 | some reason, a spurious space is tacked onto the end of the args | |
3195 | in some (at least one anyway) implementations, so strip it off if | |
3196 | it exists. */ | |
3197 | ||
3198 | char * | |
3199 | DEFUN (elf_core_file_failing_command, (abfd), | |
3200 | bfd * abfd) | |
244ffee7 | 3201 | { |
32090b8e KR |
3202 | #ifdef HAVE_PROCFS |
3203 | if (core_prpsinfo (abfd)) | |
3204 | { | |
3205 | prpsinfo_t *p = core_prpsinfo (abfd); | |
3206 | char *scan = p->pr_psargs; | |
3207 | while (*scan++) | |
3208 | {; | |
3209 | } | |
3210 | scan -= 2; | |
3211 | if ((scan > p->pr_psargs) && (*scan == ' ')) | |
3212 | { | |
3213 | *scan = '\000'; | |
3214 | } | |
3215 | return p->pr_psargs; | |
3216 | } | |
3217 | #endif | |
3218 | return NULL; | |
3219 | } | |
244ffee7 | 3220 | |
32090b8e KR |
3221 | /* Return the number of the signal that caused the core dump. Presumably, |
3222 | since we have a core file, we got a signal of some kind, so don't bother | |
3223 | checking the other process status fields, just return the signal number. | |
3224 | */ | |
244ffee7 | 3225 | |
32090b8e KR |
3226 | int |
3227 | DEFUN (elf_core_file_failing_signal, (abfd), | |
3228 | bfd * abfd) | |
3229 | { | |
3230 | #ifdef HAVE_PROCFS | |
3231 | if (core_prstatus (abfd)) | |
3232 | { | |
3233 | return ((prstatus_t *) (core_prstatus (abfd)))->pr_cursig; | |
3234 | } | |
3235 | #endif | |
3236 | return -1; | |
3237 | } | |
244ffee7 | 3238 | |
32090b8e KR |
3239 | /* Check to see if the core file could reasonably be expected to have |
3240 | come for the current executable file. Note that by default we return | |
3241 | true unless we find something that indicates that there might be a | |
3242 | problem. | |
3243 | */ | |
244ffee7 | 3244 | |
32090b8e KR |
3245 | boolean |
3246 | DEFUN (elf_core_file_matches_executable_p, (core_bfd, exec_bfd), | |
3247 | bfd * core_bfd AND | |
3248 | bfd * exec_bfd) | |
3249 | { | |
3250 | #ifdef HAVE_PROCFS | |
3251 | char *corename; | |
3252 | char *execname; | |
3253 | #endif | |
244ffee7 | 3254 | |
32090b8e KR |
3255 | /* First, xvecs must match since both are ELF files for the same target. */ |
3256 | ||
3257 | if (core_bfd->xvec != exec_bfd->xvec) | |
244ffee7 | 3258 | { |
32090b8e | 3259 | bfd_error = system_call_error; |
244ffee7 JK |
3260 | return false; |
3261 | } | |
3262 | ||
32090b8e | 3263 | #ifdef HAVE_PROCFS |
244ffee7 | 3264 | |
32090b8e KR |
3265 | /* If no prpsinfo, just return true. Otherwise, grab the last component |
3266 | of the exec'd pathname from the prpsinfo. */ | |
244ffee7 | 3267 | |
32090b8e | 3268 | if (core_prpsinfo (core_bfd)) |
244ffee7 | 3269 | { |
32090b8e KR |
3270 | corename = (((struct prpsinfo *) core_prpsinfo (core_bfd))->pr_fname); |
3271 | } | |
3272 | else | |
3273 | { | |
3274 | return true; | |
3275 | } | |
244ffee7 | 3276 | |
32090b8e | 3277 | /* Find the last component of the executable pathname. */ |
244ffee7 | 3278 | |
32090b8e KR |
3279 | if ((execname = strrchr (exec_bfd->filename, '/')) != NULL) |
3280 | { | |
3281 | execname++; | |
3282 | } | |
3283 | else | |
3284 | { | |
3285 | execname = (char *) exec_bfd->filename; | |
3286 | } | |
244ffee7 | 3287 | |
32090b8e | 3288 | /* See if they match */ |
244ffee7 | 3289 | |
32090b8e | 3290 | return strcmp (execname, corename) ? false : true; |
244ffee7 | 3291 | |
32090b8e | 3292 | #else |
244ffee7 | 3293 | |
244ffee7 | 3294 | return true; |
244ffee7 | 3295 | |
32090b8e KR |
3296 | #endif /* HAVE_PROCFS */ |
3297 | } | |
244ffee7 | 3298 | |
32090b8e KR |
3299 | /* ELF core files contain a segment of type PT_NOTE, that holds much of |
3300 | the information that would normally be available from the /proc interface | |
3301 | for the process, at the time the process dumped core. Currently this | |
3302 | includes copies of the prstatus, prpsinfo, and fpregset structures. | |
244ffee7 | 3303 | |
32090b8e KR |
3304 | Since these structures are potentially machine dependent in size and |
3305 | ordering, bfd provides two levels of support for them. The first level, | |
3306 | available on all machines since it does not require that the host | |
3307 | have /proc support or the relevant include files, is to create a bfd | |
3308 | section for each of the prstatus, prpsinfo, and fpregset structures, | |
3309 | without any interpretation of their contents. With just this support, | |
3310 | the bfd client will have to interpret the structures itself. Even with | |
3311 | /proc support, it might want these full structures for it's own reasons. | |
244ffee7 | 3312 | |
32090b8e KR |
3313 | In the second level of support, where HAVE_PROCFS is defined, bfd will |
3314 | pick apart the structures to gather some additional information that | |
3315 | clients may want, such as the general register set, the name of the | |
3316 | exec'ed file and its arguments, the signal (if any) that caused the | |
3317 | core dump, etc. | |
244ffee7 | 3318 | |
32090b8e | 3319 | */ |
244ffee7 | 3320 | |
32090b8e KR |
3321 | static boolean |
3322 | DEFUN (elf_corefile_note, (abfd, hdr), | |
244ffee7 | 3323 | bfd * abfd AND |
32090b8e | 3324 | Elf_Internal_Phdr * hdr) |
244ffee7 | 3325 | { |
32090b8e KR |
3326 | Elf_External_Note *x_note_p; /* Elf note, external form */ |
3327 | Elf_Internal_Note i_note; /* Elf note, internal form */ | |
3328 | char *buf = NULL; /* Entire note segment contents */ | |
3329 | char *namedata; /* Name portion of the note */ | |
3330 | char *descdata; /* Descriptor portion of the note */ | |
3331 | char *sectname; /* Name to use for new section */ | |
3332 | long filepos; /* File offset to descriptor data */ | |
3333 | asection *newsect; | |
3334 | ||
3335 | if (hdr->p_filesz > 0 | |
3336 | && (buf = (char *) bfd_xmalloc (hdr->p_filesz)) != NULL | |
3337 | && bfd_seek (abfd, hdr->p_offset, SEEK_SET) != -1 | |
3338 | && bfd_read ((PTR) buf, hdr->p_filesz, 1, abfd) == hdr->p_filesz) | |
3339 | { | |
3340 | x_note_p = (Elf_External_Note *) buf; | |
3341 | while ((char *) x_note_p < (buf + hdr->p_filesz)) | |
3342 | { | |
3343 | i_note.namesz = bfd_h_get_32 (abfd, (bfd_byte *) x_note_p->namesz); | |
3344 | i_note.descsz = bfd_h_get_32 (abfd, (bfd_byte *) x_note_p->descsz); | |
3345 | i_note.type = bfd_h_get_32 (abfd, (bfd_byte *) x_note_p->type); | |
3346 | namedata = x_note_p->name; | |
3347 | descdata = namedata + BFD_ALIGN (i_note.namesz, 4); | |
3348 | filepos = hdr->p_offset + (descdata - buf); | |
3349 | switch (i_note.type) | |
3350 | { | |
3351 | case NT_PRSTATUS: | |
3352 | /* process descdata as prstatus info */ | |
3353 | bfd_prstatus (abfd, descdata, i_note.descsz, filepos); | |
3354 | sectname = ".prstatus"; | |
3355 | break; | |
3356 | case NT_FPREGSET: | |
3357 | /* process descdata as fpregset info */ | |
3358 | bfd_fpregset (abfd, descdata, i_note.descsz, filepos); | |
3359 | sectname = ".fpregset"; | |
3360 | break; | |
3361 | case NT_PRPSINFO: | |
3362 | /* process descdata as prpsinfo */ | |
3363 | bfd_prpsinfo (abfd, descdata, i_note.descsz, filepos); | |
3364 | sectname = ".prpsinfo"; | |
3365 | break; | |
3366 | default: | |
3367 | /* Unknown descriptor, just ignore it. */ | |
3368 | sectname = NULL; | |
3369 | break; | |
3370 | } | |
3371 | if (sectname != NULL) | |
3372 | { | |
3373 | newsect = bfd_make_section (abfd, sectname); | |
3374 | newsect->_raw_size = i_note.descsz; | |
3375 | newsect->filepos = filepos; | |
3376 | newsect->flags = SEC_ALLOC | SEC_HAS_CONTENTS; | |
3377 | newsect->alignment_power = 2; | |
3378 | } | |
3379 | x_note_p = (Elf_External_Note *) | |
3380 | (descdata + BFD_ALIGN (i_note.descsz, 4)); | |
3381 | } | |
3382 | } | |
3383 | if (buf != NULL) | |
3384 | { | |
3385 | free (buf); | |
3386 | } | |
3387 | return true; | |
244ffee7 | 3388 | |
244ffee7 JK |
3389 | } |
3390 | ||
32090b8e KR |
3391 | /* Core files are simply standard ELF formatted files that partition |
3392 | the file using the execution view of the file (program header table) | |
3393 | rather than the linking view. In fact, there is no section header | |
3394 | table in a core file. | |
3395 | ||
3396 | The process status information (including the contents of the general | |
3397 | register set) and the floating point register set are stored in a | |
3398 | segment of type PT_NOTE. We handcraft a couple of extra bfd sections | |
3399 | that allow standard bfd access to the general registers (.reg) and the | |
3400 | floating point registers (.reg2). | |
3401 | ||
3402 | */ | |
3403 | ||
3404 | bfd_target * | |
3405 | DEFUN (elf_core_file_p, (abfd), bfd * abfd) | |
244ffee7 | 3406 | { |
32090b8e KR |
3407 | Elf_External_Ehdr x_ehdr; /* Elf file header, external form */ |
3408 | Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */ | |
3409 | Elf_External_Phdr x_phdr; /* Program header table entry, external form */ | |
3410 | Elf_Internal_Phdr *i_phdrp; /* Program header table, internal form */ | |
3411 | unsigned int phindex; | |
244ffee7 | 3412 | |
32090b8e KR |
3413 | /* Read in the ELF header in external format. */ |
3414 | ||
3415 | if (bfd_read ((PTR) & x_ehdr, sizeof (x_ehdr), 1, abfd) != sizeof (x_ehdr)) | |
244ffee7 | 3416 | { |
32090b8e | 3417 | bfd_error = system_call_error; |
244ffee7 JK |
3418 | return NULL; |
3419 | } | |
32090b8e KR |
3420 | |
3421 | /* Now check to see if we have a valid ELF file, and one that BFD can | |
3422 | make use of. The magic number must match, the address size ('class') | |
3423 | and byte-swapping must match our XVEC entry, and it must have a | |
3424 | program header table (FIXME: See comments re segments at top of this | |
3425 | file). */ | |
3426 | ||
3427 | if (elf_file_p (&x_ehdr) == false) | |
244ffee7 | 3428 | { |
32090b8e KR |
3429 | wrong: |
3430 | bfd_error = wrong_format; | |
3431 | return NULL; | |
244ffee7 | 3432 | } |
244ffee7 | 3433 | |
32090b8e | 3434 | /* FIXME, Check EI_VERSION here ! */ |
244ffee7 | 3435 | |
32090b8e KR |
3436 | { |
3437 | #if ARCH_SIZE == 32 | |
3438 | int desired_address_size = ELFCLASS32; | |
3439 | #endif | |
3440 | #if ARCH_SIZE == 64 | |
3441 | int desired_address_size = ELFCLASS64; | |
3442 | #endif | |
3443 | ||
3444 | if (x_ehdr.e_ident[EI_CLASS] != desired_address_size) | |
3445 | goto wrong; | |
3446 | } | |
3447 | ||
3448 | /* Switch xvec to match the specified byte order. */ | |
3449 | switch (x_ehdr.e_ident[EI_DATA]) | |
244ffee7 | 3450 | { |
32090b8e KR |
3451 | case ELFDATA2MSB: /* Big-endian */ |
3452 | if (abfd->xvec->byteorder_big_p == false) | |
3453 | goto wrong; | |
244ffee7 | 3454 | break; |
32090b8e KR |
3455 | case ELFDATA2LSB: /* Little-endian */ |
3456 | if (abfd->xvec->byteorder_big_p == true) | |
3457 | goto wrong; | |
244ffee7 | 3458 | break; |
32090b8e KR |
3459 | case ELFDATANONE: /* No data encoding specified */ |
3460 | default: /* Unknown data encoding specified */ | |
3461 | goto wrong; | |
244ffee7 JK |
3462 | } |
3463 | ||
32090b8e KR |
3464 | /* Allocate an instance of the elf_obj_tdata structure and hook it up to |
3465 | the tdata pointer in the bfd. */ | |
244ffee7 | 3466 | |
32090b8e KR |
3467 | elf_tdata (abfd) = |
3468 | (struct elf_obj_tdata *) bfd_zalloc (abfd, sizeof (struct elf_obj_tdata)); | |
3469 | if (elf_tdata (abfd) == NULL) | |
244ffee7 | 3470 | { |
32090b8e KR |
3471 | bfd_error = no_memory; |
3472 | return NULL; | |
244ffee7 | 3473 | } |
244ffee7 | 3474 | |
32090b8e | 3475 | /* FIXME, `wrong' returns from this point onward, leak memory. */ |
244ffee7 | 3476 | |
32090b8e KR |
3477 | /* Now that we know the byte order, swap in the rest of the header */ |
3478 | i_ehdrp = elf_elfheader (abfd); | |
3479 | elf_swap_ehdr_in (abfd, &x_ehdr, i_ehdrp); | |
3480 | #if DEBUG & 1 | |
3481 | elf_debug_file (i_ehdrp); | |
3482 | #endif | |
244ffee7 | 3483 | |
32090b8e KR |
3484 | /* If there is no program header, or the type is not a core file, then |
3485 | we are hosed. */ | |
3486 | if (i_ehdrp->e_phoff == 0 || i_ehdrp->e_type != ET_CORE) | |
3487 | goto wrong; | |
244ffee7 | 3488 | |
32090b8e KR |
3489 | /* Allocate space for a copy of the program header table in |
3490 | internal form, seek to the program header table in the file, | |
3491 | read it in, and convert it to internal form. As a simple sanity | |
3492 | check, verify that the what BFD thinks is the size of each program | |
3493 | header table entry actually matches the size recorded in the file. */ | |
3494 | ||
3495 | if (i_ehdrp->e_phentsize != sizeof (x_phdr)) | |
3496 | goto wrong; | |
3497 | i_phdrp = (Elf_Internal_Phdr *) | |
3498 | bfd_alloc (abfd, sizeof (*i_phdrp) * i_ehdrp->e_phnum); | |
3499 | if (!i_phdrp) | |
244ffee7 | 3500 | { |
32090b8e KR |
3501 | bfd_error = no_memory; |
3502 | return NULL; | |
3503 | } | |
3504 | if (bfd_seek (abfd, i_ehdrp->e_phoff, SEEK_SET) == -1) | |
3505 | { | |
3506 | bfd_error = system_call_error; | |
3507 | return NULL; | |
3508 | } | |
3509 | for (phindex = 0; phindex < i_ehdrp->e_phnum; phindex++) | |
3510 | { | |
3511 | if (bfd_read ((PTR) & x_phdr, sizeof (x_phdr), 1, abfd) | |
3512 | != sizeof (x_phdr)) | |
3513 | { | |
3514 | bfd_error = system_call_error; | |
3515 | return NULL; | |
3516 | } | |
3517 | elf_swap_phdr_in (abfd, &x_phdr, i_phdrp + phindex); | |
244ffee7 JK |
3518 | } |
3519 | ||
32090b8e KR |
3520 | /* Once all of the program headers have been read and converted, we |
3521 | can start processing them. */ | |
244ffee7 | 3522 | |
32090b8e KR |
3523 | for (phindex = 0; phindex < i_ehdrp->e_phnum; phindex++) |
3524 | { | |
3525 | bfd_section_from_phdr (abfd, i_phdrp + phindex, phindex); | |
3526 | if ((i_phdrp + phindex)->p_type == PT_NOTE) | |
3527 | { | |
3528 | elf_corefile_note (abfd, i_phdrp + phindex); | |
3529 | } | |
3530 | } | |
244ffee7 | 3531 | |
32090b8e | 3532 | /* Remember the entry point specified in the ELF file header. */ |
244ffee7 | 3533 | |
32090b8e | 3534 | bfd_get_start_address (abfd) = i_ehdrp->e_entry; |
244ffee7 | 3535 | |
32090b8e | 3536 | return abfd->xvec; |
244ffee7 | 3537 | } |