Commit | Line | Data |
---|---|---|
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 | ||
244ffee7 JK |
57 | */ |
58 | ||
32090b8e | 59 | #include <assert.h> |
244ffee7 JK |
60 | #include <string.h> /* For strrchr and friends */ |
61 | #include "bfd.h" | |
62 | #include "sysdep.h" | |
63 | #include "libbfd.h" | |
64 | #include "libelf.h" | |
65 | ||
32090b8e | 66 | /* Renaming structures, typedefs, macros and functions to be size-specific. */ |
244ffee7 | 67 | #define Elf_External_Ehdr NAME(Elf,External_Ehdr) |
244ffee7 | 68 | #define Elf_External_Sym NAME(Elf,External_Sym) |
244ffee7 | 69 | #define Elf_External_Shdr NAME(Elf,External_Shdr) |
244ffee7 | 70 | #define Elf_External_Phdr NAME(Elf,External_Phdr) |
244ffee7 JK |
71 | #define Elf_External_Rel NAME(Elf,External_Rel) |
72 | #define Elf_External_Rela NAME(Elf,External_Rela) | |
244ffee7 JK |
73 | |
74 | #define elf_symbol_type NAME(elf,symbol_type) | |
244ffee7 JK |
75 | |
76 | #define elf_core_file_failing_command NAME(bfd_elf,core_file_failing_command) | |
77 | #define elf_core_file_failing_signal NAME(bfd_elf,core_file_failing_signal) | |
78 | #define elf_core_file_matches_executable_p NAME(bfd_elf,core_file_matches_executable_p) | |
79 | #define elf_object_p NAME(bfd_elf,object_p) | |
80 | #define elf_core_file_p NAME(bfd_elf,core_file_p) | |
244ffee7 JK |
81 | #define elf_get_symtab_upper_bound NAME(bfd_elf,get_symtab_upper_bound) |
82 | #define elf_get_reloc_upper_bound NAME(bfd_elf,get_reloc_upper_bound) | |
83 | #define elf_canonicalize_reloc NAME(bfd_elf,canonicalize_reloc) | |
84 | #define elf_get_symtab NAME(bfd_elf,get_symtab) | |
85 | #define elf_make_empty_symbol NAME(bfd_elf,make_empty_symbol) | |
86 | #define elf_get_symbol_info NAME(bfd_elf,get_symbol_info) | |
87 | #define elf_print_symbol NAME(bfd_elf,print_symbol) | |
88 | #define elf_get_lineno NAME(bfd_elf,get_lineno) | |
89 | #define elf_set_arch_mach NAME(bfd_elf,set_arch_mach) | |
90 | #define elf_find_nearest_line NAME(bfd_elf,find_nearest_line) | |
91 | #define elf_sizeof_headers NAME(bfd_elf,sizeof_headers) | |
92 | #define elf_set_section_contents NAME(bfd_elf,set_section_contents) | |
93 | #define elf_no_info_to_howto NAME(bfd_elf,no_info_to_howto) | |
94 | #define elf_no_info_to_howto_rel NAME(bfd_elf,no_info_to_howto_rel) | |
244ffee7 | 95 | #define elf_hash NAME(bfd_elf,hash) |
fce36137 | 96 | #define elf_new_section_hook NAME(bfd_elf,new_section_hook) |
32090b8e | 97 | #define write_relocs NAME(bfd_elf,_write_relocs) |
244ffee7 | 98 | |
6a3eb9b6 KR |
99 | #if ARCH_SIZE == 64 |
100 | #define ELF_R_INFO(X,Y) ELF64_R_INFO(X,Y) | |
101 | #define ELF_R_SYM(X) ELF64_R_SYM(X) | |
32090b8e | 102 | #define ELFCLASS ELFCLASS64 |
6a3eb9b6 KR |
103 | #endif |
104 | #if ARCH_SIZE == 32 | |
105 | #define ELF_R_INFO(X,Y) ELF32_R_INFO(X,Y) | |
106 | #define ELF_R_SYM(X) ELF32_R_SYM(X) | |
32090b8e | 107 | #define ELFCLASS ELFCLASS32 |
244ffee7 JK |
108 | #endif |
109 | ||
110 | #ifndef INLINE | |
111 | #if __GNUC__ >= 2 | |
112 | #define INLINE __inline__ | |
113 | #else | |
114 | #define INLINE | |
115 | #endif | |
116 | #endif | |
117 | ||
32090b8e KR |
118 | static int shstrtab_length_fixed; |
119 | ||
120 | struct elf_sect_data { | |
121 | int reloc_sec; | |
122 | /* more? */ | |
123 | }; | |
124 | ||
244ffee7 JK |
125 | /* Forward declarations of static functions */ |
126 | ||
244ffee7 JK |
127 | static struct sec * section_from_elf_index PARAMS ((bfd *, int)); |
128 | ||
129 | static int elf_section_from_bfd_section PARAMS ((bfd *, struct sec *)); | |
130 | ||
131 | static boolean elf_slurp_symbol_table PARAMS ((bfd *, asymbol **)); | |
132 | ||
244ffee7 JK |
133 | static int elf_symbol_from_bfd_symbol PARAMS ((bfd *, |
134 | struct symbol_cache_entry **)); | |
135 | ||
238ac6ec | 136 | static void elf_map_symbols PARAMS ((bfd *)); |
32090b8e | 137 | static void swap_out_syms PARAMS ((bfd *)); |
244ffee7 | 138 | |
6a3eb9b6 KR |
139 | #ifdef DEBUG |
140 | static void elf_debug_section PARAMS ((char *, int, Elf_Internal_Shdr *)); | |
141 | static void elf_debug_file PARAMS ((Elf_Internal_Ehdr *)); | |
142 | #endif | |
238ac6ec | 143 | |
32090b8e KR |
144 | #define elf_string_from_elf_strtab(abfd,strindex) \ |
145 | elf_string_from_elf_section(abfd,elf_elfheader(abfd)->e_shstrndx,strindex) | |
146 | ||
147 | \f | |
148 | /* Structure swapping routines */ | |
149 | ||
6a3eb9b6 KR |
150 | /* Should perhaps use put_offset, put_word, etc. For now, the two versions |
151 | can be handled by explicitly specifying 32 bits or "the long type". */ | |
238ac6ec KR |
152 | #if ARCH_SIZE == 64 |
153 | #define put_word bfd_h_put_64 | |
154 | #define get_word bfd_h_get_64 | |
155 | #endif | |
156 | #if ARCH_SIZE == 32 | |
157 | #define put_word bfd_h_put_32 | |
158 | #define get_word bfd_h_get_32 | |
159 | #endif | |
160 | ||
244ffee7 JK |
161 | /* Translate an ELF symbol in external format into an ELF symbol in internal |
162 | format. */ | |
163 | ||
164 | static void | |
165 | DEFUN (elf_swap_symbol_in, (abfd, src, dst), | |
166 | bfd * abfd AND | |
167 | Elf_External_Sym * src AND | |
168 | Elf_Internal_Sym * dst) | |
169 | { | |
170 | dst->st_name = bfd_h_get_32 (abfd, (bfd_byte *) src->st_name); | |
238ac6ec KR |
171 | dst->st_value = get_word (abfd, (bfd_byte *) src->st_value); |
172 | dst->st_size = get_word (abfd, (bfd_byte *) src->st_size); | |
244ffee7 JK |
173 | dst->st_info = bfd_h_get_8 (abfd, (bfd_byte *) src->st_info); |
174 | dst->st_other = bfd_h_get_8 (abfd, (bfd_byte *) src->st_other); | |
175 | dst->st_shndx = bfd_h_get_16 (abfd, (bfd_byte *) src->st_shndx); | |
176 | } | |
177 | ||
178 | /* Translate an ELF symbol in internal format into an ELF symbol in external | |
179 | format. */ | |
180 | ||
181 | static void | |
182 | DEFUN (elf_swap_symbol_out, (abfd, src, dst), | |
183 | bfd * abfd AND | |
184 | Elf_Internal_Sym * src AND | |
185 | Elf_External_Sym * dst) | |
186 | { | |
187 | bfd_h_put_32 (abfd, src->st_name, dst->st_name); | |
238ac6ec KR |
188 | put_word (abfd, src->st_value, dst->st_value); |
189 | put_word (abfd, src->st_size, dst->st_size); | |
244ffee7 JK |
190 | bfd_h_put_8 (abfd, src->st_info, dst->st_info); |
191 | bfd_h_put_8 (abfd, src->st_other, dst->st_other); | |
192 | bfd_h_put_16 (abfd, src->st_shndx, dst->st_shndx); | |
193 | } | |
194 | ||
195 | ||
196 | /* Translate an ELF file header in external format into an ELF file header in | |
197 | internal format. */ | |
198 | ||
199 | static void | |
200 | DEFUN (elf_swap_ehdr_in, (abfd, src, dst), | |
201 | bfd * abfd AND | |
202 | Elf_External_Ehdr * src AND | |
203 | Elf_Internal_Ehdr * dst) | |
204 | { | |
205 | memcpy (dst->e_ident, src->e_ident, EI_NIDENT); | |
206 | dst->e_type = bfd_h_get_16 (abfd, (bfd_byte *) src->e_type); | |
207 | dst->e_machine = bfd_h_get_16 (abfd, (bfd_byte *) src->e_machine); | |
208 | dst->e_version = bfd_h_get_32 (abfd, (bfd_byte *) src->e_version); | |
238ac6ec KR |
209 | dst->e_entry = get_word (abfd, (bfd_byte *) src->e_entry); |
210 | dst->e_phoff = get_word (abfd, (bfd_byte *) src->e_phoff); | |
211 | dst->e_shoff = get_word (abfd, (bfd_byte *) src->e_shoff); | |
244ffee7 JK |
212 | dst->e_flags = bfd_h_get_32 (abfd, (bfd_byte *) src->e_flags); |
213 | dst->e_ehsize = bfd_h_get_16 (abfd, (bfd_byte *) src->e_ehsize); | |
214 | dst->e_phentsize = bfd_h_get_16 (abfd, (bfd_byte *) src->e_phentsize); | |
215 | dst->e_phnum = bfd_h_get_16 (abfd, (bfd_byte *) src->e_phnum); | |
216 | dst->e_shentsize = bfd_h_get_16 (abfd, (bfd_byte *) src->e_shentsize); | |
217 | dst->e_shnum = bfd_h_get_16 (abfd, (bfd_byte *) src->e_shnum); | |
218 | dst->e_shstrndx = bfd_h_get_16 (abfd, (bfd_byte *) src->e_shstrndx); | |
219 | } | |
220 | ||
221 | /* Translate an ELF file header in internal format into an ELF file header in | |
222 | external format. */ | |
223 | ||
224 | static void | |
225 | DEFUN (elf_swap_ehdr_out, (abfd, src, dst), | |
226 | bfd * abfd AND | |
227 | Elf_Internal_Ehdr * src AND | |
228 | Elf_External_Ehdr * dst) | |
229 | { | |
230 | memcpy (dst->e_ident, src->e_ident, EI_NIDENT); | |
231 | /* note that all elements of dst are *arrays of unsigned char* already... */ | |
232 | bfd_h_put_16 (abfd, src->e_type, dst->e_type); | |
233 | bfd_h_put_16 (abfd, src->e_machine, dst->e_machine); | |
234 | bfd_h_put_32 (abfd, src->e_version, dst->e_version); | |
238ac6ec KR |
235 | put_word (abfd, src->e_entry, dst->e_entry); |
236 | put_word (abfd, src->e_phoff, dst->e_phoff); | |
237 | put_word (abfd, src->e_shoff, dst->e_shoff); | |
244ffee7 JK |
238 | bfd_h_put_32 (abfd, src->e_flags, dst->e_flags); |
239 | bfd_h_put_16 (abfd, src->e_ehsize, dst->e_ehsize); | |
240 | bfd_h_put_16 (abfd, src->e_phentsize, dst->e_phentsize); | |
241 | bfd_h_put_16 (abfd, src->e_phnum, dst->e_phnum); | |
242 | bfd_h_put_16 (abfd, src->e_shentsize, dst->e_shentsize); | |
243 | bfd_h_put_16 (abfd, src->e_shnum, dst->e_shnum); | |
244 | bfd_h_put_16 (abfd, src->e_shstrndx, dst->e_shstrndx); | |
245 | } | |
246 | ||
247 | ||
248 | /* Translate an ELF section header table entry in external format into an | |
249 | ELF section header table entry in internal format. */ | |
250 | ||
251 | static void | |
252 | DEFUN (elf_swap_shdr_in, (abfd, src, dst), | |
253 | bfd * abfd AND | |
254 | Elf_External_Shdr * src AND | |
255 | Elf_Internal_Shdr * dst) | |
256 | { | |
257 | dst->sh_name = bfd_h_get_32 (abfd, (bfd_byte *) src->sh_name); | |
258 | dst->sh_type = bfd_h_get_32 (abfd, (bfd_byte *) src->sh_type); | |
238ac6ec KR |
259 | dst->sh_flags = get_word (abfd, (bfd_byte *) src->sh_flags); |
260 | dst->sh_addr = get_word (abfd, (bfd_byte *) src->sh_addr); | |
261 | dst->sh_offset = get_word (abfd, (bfd_byte *) src->sh_offset); | |
262 | dst->sh_size = get_word (abfd, (bfd_byte *) src->sh_size); | |
244ffee7 JK |
263 | dst->sh_link = bfd_h_get_32 (abfd, (bfd_byte *) src->sh_link); |
264 | dst->sh_info = bfd_h_get_32 (abfd, (bfd_byte *) src->sh_info); | |
238ac6ec KR |
265 | dst->sh_addralign = get_word (abfd, (bfd_byte *) src->sh_addralign); |
266 | dst->sh_entsize = get_word (abfd, (bfd_byte *) src->sh_entsize); | |
244ffee7 JK |
267 | /* we haven't done any processing on it yet, so... */ |
268 | dst->rawdata = (void *) 0; | |
269 | } | |
270 | ||
271 | /* Translate an ELF section header table entry in internal format into an | |
272 | ELF section header table entry in external format. */ | |
273 | ||
274 | static void | |
275 | DEFUN (elf_swap_shdr_out, (abfd, src, dst), | |
276 | bfd * abfd AND | |
277 | Elf_Internal_Shdr * src AND | |
278 | Elf_External_Shdr * dst) | |
279 | { | |
280 | /* note that all elements of dst are *arrays of unsigned char* already... */ | |
281 | bfd_h_put_32 (abfd, src->sh_name, dst->sh_name); | |
282 | bfd_h_put_32 (abfd, src->sh_type, dst->sh_type); | |
238ac6ec KR |
283 | put_word (abfd, src->sh_flags, dst->sh_flags); |
284 | put_word (abfd, src->sh_addr, dst->sh_addr); | |
285 | put_word (abfd, src->sh_offset, dst->sh_offset); | |
286 | put_word (abfd, src->sh_size, dst->sh_size); | |
244ffee7 JK |
287 | bfd_h_put_32 (abfd, src->sh_link, dst->sh_link); |
288 | bfd_h_put_32 (abfd, src->sh_info, dst->sh_info); | |
238ac6ec KR |
289 | put_word (abfd, src->sh_addralign, dst->sh_addralign); |
290 | put_word (abfd, src->sh_entsize, dst->sh_entsize); | |
244ffee7 JK |
291 | } |
292 | ||
293 | ||
294 | /* Translate an ELF program header table entry in external format into an | |
295 | ELF program header table entry in internal format. */ | |
296 | ||
297 | static void | |
298 | DEFUN (elf_swap_phdr_in, (abfd, src, dst), | |
299 | bfd * abfd AND | |
300 | Elf_External_Phdr * src AND | |
301 | Elf_Internal_Phdr * dst) | |
302 | { | |
303 | dst->p_type = bfd_h_get_32 (abfd, (bfd_byte *) src->p_type); | |
244ffee7 | 304 | dst->p_flags = bfd_h_get_32 (abfd, (bfd_byte *) src->p_flags); |
238ac6ec KR |
305 | dst->p_offset = get_word (abfd, (bfd_byte *) src->p_offset); |
306 | dst->p_vaddr = get_word (abfd, (bfd_byte *) src->p_vaddr); | |
307 | dst->p_paddr = get_word (abfd, (bfd_byte *) src->p_paddr); | |
308 | dst->p_filesz = get_word (abfd, (bfd_byte *) src->p_filesz); | |
309 | dst->p_memsz = get_word (abfd, (bfd_byte *) src->p_memsz); | |
310 | dst->p_align = get_word (abfd, (bfd_byte *) src->p_align); | |
244ffee7 JK |
311 | } |
312 | ||
244ffee7 JK |
313 | static void |
314 | DEFUN (elf_swap_phdr_out, (abfd, src, dst), | |
315 | bfd * abfd AND | |
316 | Elf_Internal_Phdr * src AND | |
317 | Elf_External_Phdr * dst) | |
318 | { | |
319 | /* note that all elements of dst are *arrays of unsigned char* already... */ | |
320 | bfd_h_put_32 (abfd, src->p_type, dst->p_type); | |
94dbb655 KR |
321 | put_word (abfd, src->p_offset, dst->p_offset); |
322 | put_word (abfd, src->p_vaddr, dst->p_vaddr); | |
323 | put_word (abfd, src->p_paddr, dst->p_paddr); | |
324 | put_word (abfd, src->p_filesz, dst->p_filesz); | |
325 | put_word (abfd, src->p_memsz, dst->p_memsz); | |
244ffee7 | 326 | bfd_h_put_32 (abfd, src->p_flags, dst->p_flags); |
94dbb655 | 327 | put_word (abfd, src->p_align, dst->p_align); |
244ffee7 JK |
328 | } |
329 | ||
330 | /* Translate an ELF reloc from external format to internal format. */ | |
32090b8e | 331 | static INLINE void |
244ffee7 JK |
332 | DEFUN (elf_swap_reloc_in, (abfd, src, dst), |
333 | bfd * abfd AND | |
334 | Elf_External_Rel * src AND | |
335 | Elf_Internal_Rel * dst) | |
336 | { | |
94dbb655 KR |
337 | dst->r_offset = get_word (abfd, (bfd_byte *) src->r_offset); |
338 | dst->r_info = get_word (abfd, (bfd_byte *) src->r_info); | |
244ffee7 JK |
339 | } |
340 | ||
32090b8e | 341 | static INLINE void |
244ffee7 JK |
342 | DEFUN (elf_swap_reloca_in, (abfd, src, dst), |
343 | bfd * abfd AND | |
344 | Elf_External_Rela * src AND | |
345 | Elf_Internal_Rela * dst) | |
346 | { | |
94dbb655 KR |
347 | dst->r_offset = get_word (abfd, (bfd_byte *) src->r_offset); |
348 | dst->r_info = get_word (abfd, (bfd_byte *) src->r_info); | |
349 | dst->r_addend = get_word (abfd, (bfd_byte *) src->r_addend); | |
244ffee7 JK |
350 | } |
351 | ||
352 | /* Translate an ELF reloc from internal format to external format. */ | |
32090b8e | 353 | static INLINE void |
244ffee7 JK |
354 | DEFUN (elf_swap_reloc_out, (abfd, src, dst), |
355 | bfd * abfd AND | |
356 | Elf_Internal_Rel * src AND | |
357 | Elf_External_Rel * dst) | |
358 | { | |
94dbb655 KR |
359 | put_word (abfd, src->r_offset, dst->r_offset); |
360 | put_word (abfd, src->r_info, dst->r_info); | |
244ffee7 JK |
361 | } |
362 | ||
32090b8e | 363 | static INLINE void |
244ffee7 JK |
364 | DEFUN (elf_swap_reloca_out, (abfd, src, dst), |
365 | bfd * abfd AND | |
366 | Elf_Internal_Rela * src AND | |
367 | Elf_External_Rela * dst) | |
368 | { | |
94dbb655 KR |
369 | put_word (abfd, src->r_offset, dst->r_offset); |
370 | put_word (abfd, src->r_info, dst->r_info); | |
371 | put_word (abfd, src->r_addend, dst->r_addend); | |
244ffee7 JK |
372 | } |
373 | ||
32090b8e KR |
374 | \f |
375 | ||
376 | /* String table creation/manipulation routines */ | |
377 | ||
378 | static struct strtab * | |
379 | DEFUN (bfd_new_strtab, (abfd), | |
380 | bfd * abfd) | |
381 | { | |
382 | struct strtab *ss; | |
383 | ||
384 | ss = (struct strtab *) bfd_xmalloc (sizeof (struct strtab)); | |
385 | ss->tab = bfd_xmalloc (1); | |
386 | BFD_ASSERT (ss->tab != 0); | |
387 | *ss->tab = 0; | |
388 | ss->nentries = 0; | |
389 | ss->length = 1; | |
244ffee7 | 390 | |
32090b8e KR |
391 | return ss; |
392 | } | |
393 | ||
394 | static int | |
395 | DEFUN (bfd_add_to_strtab, (abfd, ss, str), | |
396 | bfd * abfd AND | |
397 | struct strtab *ss AND | |
398 | CONST char *str) | |
399 | { | |
400 | /* should search first, but for now: */ | |
401 | /* include the trailing NUL */ | |
402 | int ln = strlen (str) + 1; | |
403 | ||
404 | /* should this be using obstacks? */ | |
405 | ss->tab = realloc (ss->tab, ss->length + ln); | |
406 | ||
407 | BFD_ASSERT (ss->tab != 0); | |
408 | strcpy (ss->tab + ss->length, str); | |
409 | ss->nentries++; | |
410 | ss->length += ln; | |
411 | ||
412 | return ss->length - ln; | |
413 | } | |
414 | ||
415 | static int | |
416 | DEFUN (bfd_add_2_to_strtab, (abfd, ss, str, str2), | |
417 | bfd * abfd AND | |
418 | struct strtab *ss AND | |
419 | char *str AND | |
420 | CONST char *str2) | |
244ffee7 | 421 | { |
32090b8e KR |
422 | /* should search first, but for now: */ |
423 | /* include the trailing NUL */ | |
424 | int ln = strlen (str) + strlen (str2) + 1; | |
425 | ||
426 | /* should this be using obstacks? */ | |
427 | if (ss->length) | |
428 | ss->tab = realloc (ss->tab, ss->length + ln); | |
429 | else | |
430 | ss->tab = bfd_xmalloc (ln); | |
431 | ||
432 | BFD_ASSERT (ss->tab != 0); | |
433 | strcpy (ss->tab + ss->length, str); | |
434 | strcpy (ss->tab + ss->length + strlen (str), str2); | |
435 | ss->nentries++; | |
436 | ss->length += ln; | |
437 | ||
438 | return ss->length - ln; | |
244ffee7 JK |
439 | } |
440 | ||
32090b8e KR |
441 | \f |
442 | /* ELF .o/exec file reading */ | |
443 | ||
444 | /* Create a new bfd section from an ELF section header. */ | |
445 | ||
244ffee7 JK |
446 | static boolean |
447 | DEFUN (bfd_section_from_shdr, (abfd, shindex), | |
448 | bfd * abfd AND | |
449 | unsigned int shindex) | |
450 | { | |
32090b8e KR |
451 | Elf_Internal_Shdr *hdr = elf_elfsections (abfd)[shindex]; |
452 | Elf_Internal_Ehdr *ehdr = elf_elfheader (abfd); | |
244ffee7 JK |
453 | asection *newsect; |
454 | char *name; | |
455 | ||
456 | name = elf_string_from_elf_strtab (abfd, hdr->sh_name); | |
457 | ||
458 | switch (hdr->sh_type) | |
459 | { | |
460 | ||
461 | case SHT_NULL: | |
462 | /* inactive section. Throw it away. */ | |
463 | return true; | |
464 | ||
465 | case SHT_PROGBITS: | |
466 | /* Bits that get saved. This one is real. */ | |
467 | if (!hdr->rawdata) | |
468 | { | |
469 | newsect = bfd_make_section (abfd, name); | |
470 | if (newsect != NULL) | |
471 | { | |
32090b8e KR |
472 | newsect->filepos = hdr->sh_offset; /* so we can read back the bits */ |
473 | newsect->flags |= SEC_HAS_CONTENTS; | |
244ffee7 JK |
474 | newsect->vma = hdr->sh_addr; |
475 | newsect->_raw_size = hdr->sh_size; | |
6a3eb9b6 | 476 | newsect->alignment_power = bfd_log2 (hdr->sh_addralign); |
244ffee7 JK |
477 | |
478 | if (hdr->sh_flags & SHF_ALLOC) | |
479 | { | |
480 | newsect->flags |= SEC_ALLOC; | |
481 | newsect->flags |= SEC_LOAD; | |
482 | } | |
483 | ||
484 | if (!(hdr->sh_flags & SHF_WRITE)) | |
485 | newsect->flags |= SEC_READONLY; | |
486 | ||
487 | if (hdr->sh_flags & SHF_EXECINSTR) | |
32090b8e | 488 | newsect->flags |= SEC_CODE; /* FIXME: may only contain SOME code */ |
244ffee7 JK |
489 | else |
490 | newsect->flags |= SEC_DATA; | |
491 | ||
492 | hdr->rawdata = (void *) newsect; | |
493 | } | |
94dbb655 KR |
494 | else |
495 | hdr->rawdata = (void *) bfd_get_section_by_name (abfd, name); | |
244ffee7 JK |
496 | } |
497 | return true; | |
498 | ||
499 | case SHT_NOBITS: | |
500 | /* Bits that get saved. This one is real. */ | |
501 | if (!hdr->rawdata) | |
502 | { | |
503 | newsect = bfd_make_section (abfd, name); | |
504 | if (newsect != NULL) | |
505 | { | |
506 | newsect->vma = hdr->sh_addr; | |
507 | newsect->_raw_size = hdr->sh_size; | |
508 | newsect->filepos = hdr->sh_offset; /* fake */ | |
6a3eb9b6 | 509 | newsect->alignment_power = bfd_log2 (hdr->sh_addralign); |
244ffee7 JK |
510 | if (hdr->sh_flags & SHF_ALLOC) |
511 | newsect->flags |= SEC_ALLOC; | |
512 | ||
513 | if (!(hdr->sh_flags & SHF_WRITE)) | |
514 | newsect->flags |= SEC_READONLY; | |
515 | ||
516 | if (hdr->sh_flags & SHF_EXECINSTR) | |
517 | newsect->flags |= SEC_CODE; /* FIXME: may only contain SOME code */ | |
518 | else | |
519 | newsect->flags |= SEC_DATA; | |
520 | ||
521 | hdr->rawdata = (void *) newsect; | |
522 | } | |
523 | } | |
524 | return true; | |
525 | ||
526 | case SHT_SYMTAB: /* A symbol table */ | |
32090b8e KR |
527 | if (elf_onesymtab (abfd) == shindex) |
528 | return true; | |
529 | ||
244ffee7 | 530 | BFD_ASSERT (hdr->sh_entsize == sizeof (Elf_External_Sym)); |
32090b8e | 531 | BFD_ASSERT (elf_onesymtab (abfd) == 0); |
244ffee7 | 532 | elf_onesymtab (abfd) = shindex; |
32090b8e KR |
533 | elf_tdata(abfd)->symtab_hdr = *hdr; |
534 | elf_elfsections(abfd)[shindex] = &elf_tdata(abfd)->symtab_hdr; | |
244ffee7 JK |
535 | abfd->flags |= HAS_SYMS; |
536 | return true; | |
537 | ||
538 | case SHT_STRTAB: /* A string table */ | |
32090b8e | 539 | if (hdr->rawdata) |
fce36137 | 540 | return true; |
32090b8e KR |
541 | if (ehdr->e_shstrndx == shindex) |
542 | { | |
543 | elf_tdata(abfd)->shstrtab_hdr = *hdr; | |
544 | elf_elfsections(abfd)[shindex] = &elf_tdata(abfd)->shstrtab_hdr; | |
545 | hdr->rawdata = (PTR) &elf_tdata(abfd)->shstrtab_hdr; | |
546 | return true; | |
547 | } | |
548 | { | |
549 | int i; | |
fce36137 | 550 | |
32090b8e KR |
551 | for (i = 1; i < ehdr->e_shnum; i++) |
552 | { | |
553 | Elf_Internal_Shdr *hdr2 = elf_elfsections(abfd)[i]; | |
554 | if (hdr2->sh_link == shindex) | |
555 | { | |
556 | bfd_section_from_shdr (abfd, i); | |
557 | if (elf_onesymtab (abfd) == i) | |
558 | { | |
559 | elf_tdata(abfd)->strtab_hdr = *hdr; | |
560 | elf_elfsections(abfd)[shindex] = &elf_tdata(abfd)->strtab_hdr; | |
561 | return true; | |
562 | } | |
563 | #if 0 /* Not handling other string tables specially right now. */ | |
564 | hdr2 = elf_elfsections(abfd)[i]; /* in case it moved */ | |
565 | /* We have a strtab for some random other section. */ | |
566 | newsect = (asection *) hdr2->rawdata; | |
567 | if (!newsect) | |
568 | break; | |
569 | hdr->rawdata = (PTR) newsect; | |
570 | hdr2 = &elf_section_data (newsect)->str_hdr; | |
571 | *hdr2 = *hdr; | |
572 | elf_elfsections(abfd)[shindex] = hdr2; | |
573 | #endif | |
574 | } | |
575 | } | |
576 | } | |
577 | ||
578 | newsect = bfd_make_section (abfd, name); | |
579 | if (newsect) | |
fce36137 | 580 | { |
32090b8e KR |
581 | newsect->flags = SEC_HAS_CONTENTS; |
582 | hdr->rawdata = (PTR) newsect; | |
583 | newsect->_raw_size = hdr->sh_size; | |
584 | newsect->alignment_power = 0; | |
585 | newsect->vma = 0; | |
586 | ||
587 | if (hdr->sh_flags & SHF_ALLOC) | |
588 | newsect->flags |= SEC_ALLOC|SEC_LOAD; | |
589 | if (!(hdr->sh_flags & SHF_WRITE)) | |
590 | newsect->flags |= SEC_READONLY; | |
591 | if (hdr->sh_flags & SHF_EXECINSTR) | |
592 | newsect->flags |= SEC_CODE; | |
593 | else | |
594 | newsect->flags |= SEC_DATA; | |
fce36137 KR |
595 | } |
596 | ||
244ffee7 JK |
597 | return true; |
598 | ||
599 | case SHT_REL: | |
600 | case SHT_RELA: | |
32090b8e KR |
601 | /* *These* do a lot of work -- but build no sections! |
602 | The spec says there can be multiple strtabs, but only one symtab, | |
603 | but there can be lots of REL* sections. */ | |
244ffee7 | 604 | /* FIXME: The above statement is wrong! There are typically at least |
32090b8e KR |
605 | two symbol tables in a dynamically linked executable, ".dynsym" |
606 | which is the dynamic linkage symbol table and ".symtab", which is | |
607 | the "traditional" symbol table. -fnf */ | |
244ffee7 JK |
608 | |
609 | { | |
610 | asection *target_sect; | |
32090b8e | 611 | Elf_Internal_Shdr *hdr2; |
244ffee7 JK |
612 | int use_rela_p = get_elf_backend_data (abfd)->use_rela_p; |
613 | ||
614 | /* Don't allow REL relocations on a machine that uses RELA and | |
615 | vice versa. */ | |
616 | /* @@ Actually, the generic ABI does suggest that both might be | |
617 | used in one file. But the four ABI Processor Supplements I | |
618 | have access to right now all specify that only one is used on | |
619 | each of those architectures. It's conceivable that, e.g., a | |
620 | bunch of absolute 32-bit relocs might be more compact in REL | |
621 | form even on a RELA machine... */ | |
622 | BFD_ASSERT (!(use_rela_p && (hdr->sh_type == SHT_REL))); | |
623 | BFD_ASSERT (!(!use_rela_p && (hdr->sh_type == SHT_RELA))); | |
624 | BFD_ASSERT (hdr->sh_entsize == | |
625 | (use_rela_p | |
6a3eb9b6 KR |
626 | ? sizeof (Elf_External_Rela) |
627 | : sizeof (Elf_External_Rel))); | |
244ffee7 | 628 | |
244ffee7 | 629 | bfd_section_from_shdr (abfd, hdr->sh_info); /* target */ |
32090b8e | 630 | bfd_section_from_shdr (abfd, hdr->sh_link); /* symbol table */ |
244ffee7 JK |
631 | target_sect = section_from_elf_index (abfd, hdr->sh_info); |
632 | if (target_sect == NULL) | |
633 | return false; | |
634 | ||
32090b8e KR |
635 | hdr2 = &elf_section_data (target_sect)->rel_hdr; |
636 | *hdr2 = *hdr; | |
637 | elf_elfsections(abfd)[shindex] = hdr2; | |
244ffee7 JK |
638 | target_sect->reloc_count = hdr->sh_size / hdr->sh_entsize; |
639 | target_sect->flags |= SEC_RELOC; | |
640 | target_sect->relocation = 0; | |
641 | target_sect->rel_filepos = hdr->sh_offset; | |
32090b8e | 642 | abfd->flags |= HAS_RELOC; |
244ffee7 JK |
643 | return true; |
644 | } | |
645 | break; | |
646 | ||
647 | case SHT_HASH: | |
648 | case SHT_DYNAMIC: | |
649 | case SHT_DYNSYM: /* could treat this like symtab... */ | |
650 | #if 0 | |
651 | fprintf (stderr, "Dynamic Linking sections not yet supported.\n"); | |
652 | BFD_FAIL (); | |
653 | #endif | |
654 | break; | |
655 | ||
656 | case SHT_NOTE: | |
657 | #if 0 | |
658 | fprintf (stderr, "Note Sections not yet supported.\n"); | |
659 | BFD_FAIL (); | |
660 | #endif | |
661 | break; | |
662 | ||
663 | case SHT_SHLIB: | |
664 | #if 0 | |
665 | fprintf (stderr, "SHLIB Sections not supported (and non conforming.)\n"); | |
666 | #endif | |
667 | return true; | |
668 | ||
669 | default: | |
670 | break; | |
671 | } | |
672 | ||
673 | return true; | |
674 | } | |
675 | ||
fce36137 KR |
676 | boolean |
677 | DEFUN (elf_new_section_hook, (abfd, sec), | |
678 | bfd *abfd | |
679 | AND asection *sec) | |
680 | { | |
32090b8e KR |
681 | struct bfd_elf_section_data *sdata; |
682 | sec->used_by_bfd = sdata = bfd_alloc (abfd, sizeof (*sdata)); | |
683 | memset (sdata, 0, sizeof (*sdata)); | |
244ffee7 JK |
684 | return true; |
685 | } | |
686 | ||
687 | /* Create a new bfd section from an ELF program header. | |
688 | ||
689 | Since program segments have no names, we generate a synthetic name | |
690 | of the form segment<NUM>, where NUM is generally the index in the | |
691 | program header table. For segments that are split (see below) we | |
692 | generate the names segment<NUM>a and segment<NUM>b. | |
693 | ||
694 | Note that some program segments may have a file size that is different than | |
695 | (less than) the memory size. All this means is that at execution the | |
696 | system must allocate the amount of memory specified by the memory size, | |
697 | but only initialize it with the first "file size" bytes read from the | |
698 | file. This would occur for example, with program segments consisting | |
699 | of combined data+bss. | |
700 | ||
701 | To handle the above situation, this routine generates TWO bfd sections | |
702 | for the single program segment. The first has the length specified by | |
703 | the file size of the segment, and the second has the length specified | |
704 | by the difference between the two sizes. In effect, the segment is split | |
705 | into it's initialized and uninitialized parts. | |
706 | ||
707 | */ | |
708 | ||
709 | static boolean | |
710 | DEFUN (bfd_section_from_phdr, (abfd, hdr, index), | |
711 | bfd * abfd AND | |
712 | Elf_Internal_Phdr * hdr AND | |
713 | int index) | |
714 | { | |
715 | asection *newsect; | |
716 | char *name; | |
717 | char namebuf[64]; | |
718 | int split; | |
719 | ||
720 | split = ((hdr->p_memsz > 0) && | |
721 | (hdr->p_filesz > 0) && | |
722 | (hdr->p_memsz > hdr->p_filesz)); | |
723 | sprintf (namebuf, split ? "segment%da" : "segment%d", index); | |
724 | name = bfd_alloc (abfd, strlen (namebuf) + 1); | |
725 | strcpy (name, namebuf); | |
726 | newsect = bfd_make_section (abfd, name); | |
727 | newsect->vma = hdr->p_vaddr; | |
728 | newsect->_raw_size = hdr->p_filesz; | |
729 | newsect->filepos = hdr->p_offset; | |
730 | newsect->flags |= SEC_HAS_CONTENTS; | |
731 | if (hdr->p_type == PT_LOAD) | |
732 | { | |
733 | newsect->flags |= SEC_ALLOC; | |
734 | newsect->flags |= SEC_LOAD; | |
735 | if (hdr->p_flags & PF_X) | |
736 | { | |
737 | /* FIXME: all we known is that it has execute PERMISSION, | |
738 | may be data. */ | |
739 | newsect->flags |= SEC_CODE; | |
740 | } | |
741 | } | |
742 | if (!(hdr->p_flags & PF_W)) | |
743 | { | |
744 | newsect->flags |= SEC_READONLY; | |
745 | } | |
746 | ||
747 | if (split) | |
748 | { | |
749 | sprintf (namebuf, "segment%db", index); | |
750 | name = bfd_alloc (abfd, strlen (namebuf) + 1); | |
751 | strcpy (name, namebuf); | |
752 | newsect = bfd_make_section (abfd, name); | |
753 | newsect->vma = hdr->p_vaddr + hdr->p_filesz; | |
754 | newsect->_raw_size = hdr->p_memsz - hdr->p_filesz; | |
755 | if (hdr->p_type == PT_LOAD) | |
756 | { | |
757 | newsect->flags |= SEC_ALLOC; | |
758 | if (hdr->p_flags & PF_X) | |
759 | newsect->flags |= SEC_CODE; | |
760 | } | |
761 | if (!(hdr->p_flags & PF_W)) | |
762 | newsect->flags |= SEC_READONLY; | |
763 | } | |
764 | ||
765 | return true; | |
766 | } | |
767 | ||
32090b8e | 768 | /* Begin processing a given object. |
244ffee7 | 769 | |
32090b8e KR |
770 | First we validate the file by reading in the ELF header and checking |
771 | the magic number. */ | |
772 | ||
773 | static INLINE boolean | |
774 | DEFUN (elf_file_p, (x_ehdrp), Elf_External_Ehdr * x_ehdrp) | |
244ffee7 | 775 | { |
32090b8e KR |
776 | return ((x_ehdrp->e_ident[EI_MAG0] == ELFMAG0) |
777 | && (x_ehdrp->e_ident[EI_MAG1] == ELFMAG1) | |
778 | && (x_ehdrp->e_ident[EI_MAG2] == ELFMAG2) | |
779 | && (x_ehdrp->e_ident[EI_MAG3] == ELFMAG3)); | |
780 | } | |
244ffee7 | 781 | |
32090b8e KR |
782 | bfd_target * |
783 | DEFUN (elf_object_p, (abfd), bfd * abfd) | |
244ffee7 | 784 | { |
32090b8e KR |
785 | Elf_External_Ehdr x_ehdr; /* Elf file header, external form */ |
786 | Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */ | |
787 | Elf_External_Shdr x_shdr; /* Section header table entry, external form */ | |
788 | Elf_Internal_Shdr *i_shdrp; /* Section header table, internal form */ | |
789 | int shindex; | |
790 | char *shstrtab; /* Internal copy of section header stringtab */ | |
791 | struct elf_backend_data *ebd; /* Use to get ELF_ARCH stored in xvec */ | |
244ffee7 | 792 | |
32090b8e KR |
793 | /* Read in the ELF header in external format. */ |
794 | ||
795 | if (bfd_read ((PTR) & x_ehdr, sizeof (x_ehdr), 1, abfd) != sizeof (x_ehdr)) | |
244ffee7 | 796 | { |
32090b8e KR |
797 | bfd_error = system_call_error; |
798 | return NULL; | |
244ffee7 | 799 | } |
244ffee7 | 800 | |
32090b8e KR |
801 | /* Now check to see if we have a valid ELF file, and one that BFD can |
802 | make use of. The magic number must match, the address size ('class') | |
803 | and byte-swapping must match our XVEC entry, and it must have a | |
804 | section header table (FIXME: See comments re sections at top of this | |
805 | file). */ | |
244ffee7 | 806 | |
32090b8e KR |
807 | if (elf_file_p (&x_ehdr) == false) |
808 | { | |
809 | wrong: | |
810 | bfd_error = wrong_format; | |
811 | return NULL; | |
812 | } | |
244ffee7 | 813 | |
32090b8e KR |
814 | if (x_ehdr.e_ident[EI_VERSION] != EV_CURRENT) |
815 | goto wrong; | |
244ffee7 | 816 | |
32090b8e KR |
817 | if (x_ehdr.e_ident[EI_CLASS] != ELFCLASS) |
818 | goto wrong; | |
244ffee7 | 819 | |
32090b8e KR |
820 | /* Switch xvec to match the specified byte order. */ |
821 | switch (x_ehdr.e_ident[EI_DATA]) | |
244ffee7 | 822 | { |
32090b8e KR |
823 | case ELFDATA2MSB: /* Big-endian */ |
824 | if (!abfd->xvec->header_byteorder_big_p) | |
825 | goto wrong; | |
826 | break; | |
827 | case ELFDATA2LSB: /* Little-endian */ | |
828 | if (abfd->xvec->header_byteorder_big_p) | |
829 | goto wrong; | |
830 | break; | |
831 | case ELFDATANONE: /* No data encoding specified */ | |
832 | default: /* Unknown data encoding specified */ | |
833 | goto wrong; | |
244ffee7 | 834 | } |
244ffee7 | 835 | |
32090b8e KR |
836 | /* Allocate an instance of the elf_obj_tdata structure and hook it up to |
837 | the tdata pointer in the bfd. */ | |
244ffee7 | 838 | |
32090b8e KR |
839 | if (NULL == (elf_tdata (abfd) = (struct elf_obj_tdata *) |
840 | bfd_zalloc (abfd, sizeof (struct elf_obj_tdata)))) | |
244ffee7 | 841 | { |
32090b8e KR |
842 | bfd_error = no_memory; |
843 | return NULL; | |
244ffee7 | 844 | } |
244ffee7 | 845 | |
32090b8e | 846 | /* FIXME: Any `wrong' exits below here will leak memory (tdata). */ |
244ffee7 | 847 | |
32090b8e KR |
848 | /* Now that we know the byte order, swap in the rest of the header */ |
849 | i_ehdrp = elf_elfheader (abfd); | |
850 | elf_swap_ehdr_in (abfd, &x_ehdr, i_ehdrp); | |
851 | #if DEBUG & 1 | |
852 | elf_debug_file (i_ehdrp); | |
244ffee7 JK |
853 | #endif |
854 | ||
32090b8e KR |
855 | /* If there is no section header table, we're hosed. */ |
856 | if (i_ehdrp->e_shoff == 0) | |
857 | goto wrong; | |
244ffee7 | 858 | |
32090b8e KR |
859 | if (i_ehdrp->e_type == ET_EXEC || i_ehdrp->e_type == ET_DYN) |
860 | abfd->flags |= EXEC_P; | |
244ffee7 | 861 | |
32090b8e KR |
862 | /* Retrieve the architecture information from the xvec and verify |
863 | that it matches the machine info stored in the ELF header. | |
864 | This allows us to resolve ambiguous formats that might not | |
865 | otherwise be distinguishable. */ | |
244ffee7 | 866 | |
32090b8e | 867 | ebd = get_elf_backend_data (abfd); |
244ffee7 | 868 | |
32090b8e KR |
869 | /* Perhaps the elf architecture value should be another field in the |
870 | elf backend data? If you change this to work that way, make sure | |
871 | that you still get bfd_arch_unknown for unknown architecture types, | |
872 | and that it still gets accepted by the `generic' elf target. */ | |
873 | { | |
874 | int i; | |
875 | enum bfd_architecture arch = bfd_arch_unknown; | |
876 | ||
877 | for (i = 0; i < bfd_elf_arch_map_size; i++) | |
878 | { | |
879 | if (bfd_elf_arch_map[i].elf_arch == i_ehdrp->e_machine) | |
880 | { | |
881 | arch = bfd_elf_arch_map[i].bfd_arch; | |
882 | break; | |
883 | } | |
884 | } | |
885 | /* start-sanitize-v9 */ | |
886 | if (i_ehdrp->e_machine == EM_SPARC64) | |
887 | arch = bfd_arch_sparc; | |
888 | /* end-sanitize-v9 */ | |
889 | if (ebd->arch != arch) | |
890 | goto wrong; | |
891 | bfd_default_set_arch_mach (abfd, arch, 0); | |
892 | } | |
893 | ||
894 | /* Allocate space for a copy of the section header table in | |
895 | internal form, seek to the section header table in the file, | |
896 | read it in, and convert it to internal form. As a simple sanity | |
897 | check, verify that the what BFD thinks is the size of each section | |
898 | header table entry actually matches the size recorded in the file. */ | |
899 | ||
900 | if (i_ehdrp->e_shentsize != sizeof (x_shdr)) | |
901 | goto wrong; | |
902 | i_shdrp = (Elf_Internal_Shdr *) | |
903 | bfd_alloc (abfd, sizeof (*i_shdrp) * i_ehdrp->e_shnum); | |
904 | elf_elfsections (abfd) = bfd_alloc (abfd, sizeof (i_shdrp) * i_ehdrp->e_shnum); | |
905 | if (!i_shdrp || !elf_elfsections(abfd)) | |
244ffee7 | 906 | { |
32090b8e KR |
907 | bfd_error = no_memory; |
908 | return NULL; | |
244ffee7 | 909 | } |
32090b8e | 910 | if (bfd_seek (abfd, i_ehdrp->e_shoff, SEEK_SET) == -1) |
244ffee7 | 911 | { |
32090b8e KR |
912 | bfd_error = system_call_error; |
913 | return NULL; | |
244ffee7 | 914 | } |
32090b8e | 915 | for (shindex = 0; shindex < i_ehdrp->e_shnum; shindex++) |
244ffee7 | 916 | { |
32090b8e KR |
917 | if (bfd_read ((PTR) & x_shdr, sizeof x_shdr, 1, abfd) |
918 | != sizeof (x_shdr)) | |
919 | { | |
920 | bfd_error = system_call_error; | |
921 | return NULL; | |
922 | } | |
923 | elf_swap_shdr_in (abfd, &x_shdr, i_shdrp + shindex); | |
924 | elf_elfsections(abfd)[shindex] = i_shdrp + shindex; | |
244ffee7 | 925 | } |
32090b8e | 926 | if (i_ehdrp->e_shstrndx) |
244ffee7 | 927 | { |
32090b8e | 928 | bfd_section_from_shdr (abfd, i_ehdrp->e_shstrndx); |
244ffee7 JK |
929 | } |
930 | ||
32090b8e KR |
931 | #if 0 |
932 | for (shindex = i_ehdrp->e_shnum - 1; shindex >= 0; shindex--) | |
933 | { | |
934 | if (!strcmp (elf_string_from_elf_strtab (abfd, | |
935 | i_shdrp[shindex].sh_name), | |
936 | ".strtab")) | |
937 | { | |
938 | elf_tdata(abfd)->strtab_hdr = i_shdrp[shindex]; | |
939 | elf_elfsections(abfd)[shindex] = &elf_tdata(abfd)->strtab_hdr; | |
940 | } | |
941 | else if (!strcmp (elf_string_from_elf_strtab (abfd, | |
942 | i_shdrp[shindex].sh_name), | |
943 | ".symtab")) | |
944 | { | |
945 | elf_tdata(abfd)->symtab_hdr = i_shdrp[shindex]; | |
946 | elf_elfsections(abfd)[shindex] = &elf_tdata(abfd)->symtab_hdr; | |
947 | elf_onesymtab (abfd) = shindex; | |
948 | } | |
949 | } | |
950 | #endif | |
244ffee7 | 951 | |
32090b8e KR |
952 | /* Read in the string table containing the names of the sections. We |
953 | will need the base pointer to this table later. */ | |
954 | /* We read this inline now, so that we don't have to go through | |
955 | bfd_section_from_shdr with it (since this particular strtab is | |
956 | used to find all of the ELF section names.) */ | |
244ffee7 | 957 | |
32090b8e KR |
958 | shstrtab = elf_get_str_section (abfd, i_ehdrp->e_shstrndx); |
959 | if (!shstrtab) | |
960 | return NULL; | |
244ffee7 | 961 | |
32090b8e KR |
962 | /* Once all of the section headers have been read and converted, we |
963 | can start processing them. Note that the first section header is | |
964 | a dummy placeholder entry, so we ignore it. | |
244ffee7 | 965 | |
32090b8e KR |
966 | We also watch for the symbol table section and remember the file |
967 | offset and section size for both the symbol table section and the | |
968 | associated string table section. */ | |
244ffee7 | 969 | |
32090b8e KR |
970 | for (shindex = 1; shindex < i_ehdrp->e_shnum; shindex++) |
971 | { | |
972 | bfd_section_from_shdr (abfd, shindex); | |
973 | } | |
244ffee7 | 974 | |
32090b8e | 975 | /* Remember the entry point specified in the ELF file header. */ |
244ffee7 | 976 | |
32090b8e | 977 | bfd_get_start_address (abfd) = i_ehdrp->e_entry; |
244ffee7 | 978 | |
32090b8e KR |
979 | return abfd->xvec; |
980 | } | |
244ffee7 | 981 | |
32090b8e KR |
982 | \f |
983 | /* ELF .o/exec file writing */ | |
984 | ||
985 | /* Create a new ELF section from a bfd section. */ | |
986 | ||
987 | #if 0 /* not used */ | |
244ffee7 | 988 | static boolean |
32090b8e | 989 | DEFUN (bfd_shdr_from_section, (abfd, hdr, shstrtab, indx), |
244ffee7 | 990 | bfd * abfd AND |
32090b8e KR |
991 | Elf_Internal_Shdr * hdr AND |
992 | struct strtab *shstrtab AND | |
993 | int indx) | |
244ffee7 | 994 | { |
32090b8e KR |
995 | asection *sect; |
996 | int ndx; | |
244ffee7 | 997 | |
32090b8e KR |
998 | sect = abfd->sections; |
999 | for (ndx = indx; --ndx;) | |
244ffee7 | 1000 | { |
32090b8e | 1001 | sect = sect->next; |
244ffee7 | 1002 | } |
32090b8e KR |
1003 | hdr[indx].sh_name = bfd_add_to_strtab (abfd, shstrtab, |
1004 | bfd_section_name (abfd, sect)); | |
1005 | hdr[indx].sh_addr = sect->vma; | |
1006 | hdr[indx].sh_size = sect->_raw_size; | |
1007 | hdr[indx].sh_addralign = 1 << sect->alignment_power; | |
1008 | hdr[indx].sh_flags = 0; | |
1009 | /* these need to be preserved on */ | |
1010 | hdr[indx].sh_link = 0; | |
1011 | hdr[indx].sh_info = 0; | |
1012 | hdr[indx].sh_entsize = 0; | |
1013 | ||
1014 | hdr[indx].sh_type = 0; | |
1015 | if (sect->flags & SEC_RELOC) | |
244ffee7 | 1016 | { |
32090b8e KR |
1017 | int use_rela_p = get_elf_backend_data (abfd)->use_rela_p; |
1018 | hdr[indx].sh_type = use_rela_p ? SHT_RELA : SHT_REL; | |
244ffee7 | 1019 | } |
244ffee7 | 1020 | |
32090b8e KR |
1021 | if (sect->flags & SEC_HAS_CONTENTS) |
1022 | { | |
1023 | hdr[indx].sh_offset = sect->filepos; | |
1024 | hdr[indx].sh_size = sect->_raw_size; | |
1025 | } | |
1026 | if (sect->flags & SEC_ALLOC) | |
1027 | { | |
1028 | hdr[indx].sh_flags |= SHF_ALLOC; | |
1029 | if (sect->flags & SEC_LOAD) | |
1030 | { | |
1031 | /* do something with sh_type ? */ | |
1032 | } | |
1033 | } | |
1034 | if (!(sect->flags & SEC_READONLY)) | |
1035 | hdr[indx].sh_flags |= SHF_WRITE; | |
244ffee7 | 1036 | |
32090b8e KR |
1037 | if (sect->flags & SEC_CODE) |
1038 | hdr[indx].sh_flags |= SHF_EXECINSTR; | |
244ffee7 | 1039 | |
32090b8e KR |
1040 | return true; |
1041 | } | |
1042 | #endif | |
244ffee7 | 1043 | |
32090b8e KR |
1044 | /* |
1045 | Takes a bfd and a symbol, returns a pointer to the elf specific area | |
1046 | of the symbol if there is one. | |
1047 | */ | |
1048 | static INLINE elf_symbol_type * | |
1049 | DEFUN (elf_symbol_from, (ignore_abfd, symbol), | |
1050 | bfd * ignore_abfd AND | |
1051 | asymbol * symbol) | |
244ffee7 | 1052 | { |
32090b8e KR |
1053 | if (symbol->the_bfd->xvec->flavour != bfd_target_elf_flavour) |
1054 | return 0; | |
1055 | ||
1056 | if (symbol->the_bfd->tdata.elf_obj_data == (struct elf_obj_tdata *) NULL) | |
1057 | return 0; | |
1058 | ||
1059 | return (elf_symbol_type *) symbol; | |
244ffee7 JK |
1060 | } |
1061 | ||
32090b8e KR |
1062 | /* |
1063 | Create ELF output from BFD sections. | |
244ffee7 | 1064 | |
32090b8e KR |
1065 | Essentially, just create the section header and forget about the program |
1066 | header for now. | |
244ffee7 | 1067 | |
32090b8e | 1068 | */ |
244ffee7 | 1069 | |
32090b8e KR |
1070 | static void |
1071 | DEFUN (elf_make_sections, (abfd, asect, obj), | |
1072 | bfd * abfd AND | |
1073 | asection * asect AND | |
1074 | PTR obj) | |
1075 | { | |
1076 | /* most of what is in bfd_shdr_from_section goes in here... */ | |
1077 | /* and all of these sections generate at *least* one ELF section. */ | |
1078 | int idx; | |
244ffee7 | 1079 | |
32090b8e KR |
1080 | Elf_Internal_Shdr *this_hdr; |
1081 | this_hdr = &elf_section_data (asect)->this_hdr; | |
244ffee7 | 1082 | |
32090b8e KR |
1083 | this_hdr->sh_addr = asect->vma; |
1084 | this_hdr->sh_size = asect->_raw_size; | |
1085 | /* contents already set by elf_set_section_contents */ | |
244ffee7 | 1086 | |
32090b8e KR |
1087 | if ((asect->flags & SEC_RELOC) |
1088 | #if 0 | |
1089 | /* The flags are sometimes inconsistent. */ | |
1090 | && asect->reloc_count > 0 | |
244ffee7 | 1091 | #endif |
32090b8e | 1092 | ) |
244ffee7 | 1093 | { |
32090b8e KR |
1094 | /* emit a reloc section, and thus strtab and symtab... */ |
1095 | Elf_Internal_Shdr *rela_hdr; | |
1096 | Elf_External_Rela *outbound_relocas; | |
1097 | Elf_External_Rel *outbound_relocs; | |
1098 | int use_rela_p = get_elf_backend_data (abfd)->use_rela_p; | |
244ffee7 | 1099 | |
32090b8e | 1100 | rela_hdr = &elf_section_data (asect)->rel_hdr; |
244ffee7 | 1101 | |
32090b8e KR |
1102 | /* orelocation has the data, reloc_count has the count... */ |
1103 | if (use_rela_p) | |
1104 | { | |
1105 | rela_hdr->sh_type = SHT_RELA; | |
1106 | rela_hdr->sh_entsize = sizeof (Elf_External_Rela); | |
1107 | } | |
1108 | else | |
1109 | /* REL relocations */ | |
1110 | { | |
1111 | rela_hdr->sh_type = SHT_REL; | |
1112 | rela_hdr->sh_entsize = sizeof (Elf_External_Rel); | |
1113 | } | |
1114 | rela_hdr->sh_flags = 0; | |
1115 | rela_hdr->sh_addr = 0; | |
1116 | rela_hdr->sh_offset = 0; | |
1117 | rela_hdr->sh_addralign = 0; | |
1118 | rela_hdr->size = 0; | |
1119 | } | |
1120 | if (asect->flags & SEC_ALLOC) | |
244ffee7 | 1121 | { |
32090b8e KR |
1122 | this_hdr->sh_flags |= SHF_ALLOC; |
1123 | if (asect->flags & SEC_LOAD) | |
1124 | { | |
1125 | /* @@ Do something with sh_type? */ | |
1126 | } | |
244ffee7 | 1127 | } |
32090b8e KR |
1128 | if (!(asect->flags & SEC_READONLY)) |
1129 | this_hdr->sh_flags |= SHF_WRITE; | |
244ffee7 | 1130 | |
32090b8e KR |
1131 | if (asect->flags & SEC_CODE) |
1132 | this_hdr->sh_flags |= SHF_EXECINSTR; | |
1133 | } | |
244ffee7 | 1134 | |
32090b8e KR |
1135 | void |
1136 | write_relocs (abfd, sec, xxx) | |
1137 | bfd *abfd; | |
1138 | asection *sec; | |
1139 | PTR xxx; | |
1140 | { | |
1141 | Elf_Internal_Shdr *rela_hdr; | |
1142 | Elf_External_Rela *outbound_relocas; | |
1143 | Elf_External_Rel *outbound_relocs; | |
1144 | int idx; | |
1145 | int use_rela_p = get_elf_backend_data (abfd)->use_rela_p; | |
244ffee7 | 1146 | |
32090b8e KR |
1147 | malloc(0); |
1148 | if ((sec->flags & SEC_RELOC) == 0) | |
1149 | return; | |
1150 | /* Flags are sometimes inconsistent. */ | |
1151 | if (sec->reloc_count == 0) | |
1152 | return; | |
244ffee7 | 1153 | |
32090b8e | 1154 | rela_hdr = &elf_section_data (sec)->rel_hdr; |
244ffee7 | 1155 | |
32090b8e KR |
1156 | rela_hdr->sh_size = rela_hdr->sh_entsize * sec->reloc_count; |
1157 | rela_hdr->contents = (void *) bfd_alloc (abfd, rela_hdr->sh_size); | |
244ffee7 | 1158 | |
32090b8e KR |
1159 | /* orelocation has the data, reloc_count has the count... */ |
1160 | if (use_rela_p) | |
1161 | { | |
1162 | outbound_relocas = (Elf_External_Rela *) rela_hdr->contents; | |
6a3eb9b6 | 1163 | |
32090b8e KR |
1164 | for (idx = 0; idx < sec->reloc_count; idx++) |
1165 | { | |
1166 | Elf_Internal_Rela dst_rela; | |
1167 | Elf_External_Rela *src_rela; | |
1168 | arelent *ptr; | |
1169 | asymbol *sym; | |
6a3eb9b6 | 1170 | |
32090b8e KR |
1171 | ptr = sec->orelocation[idx]; |
1172 | src_rela = outbound_relocas + idx; | |
1173 | if (!(abfd->flags & EXEC_P)) | |
1174 | dst_rela.r_offset = ptr->address - sec->vma; | |
1175 | else | |
1176 | dst_rela.r_offset = ptr->address; | |
244ffee7 | 1177 | |
32090b8e KR |
1178 | sym = *ptr->sym_ptr_ptr; |
1179 | #if 0 | |
1180 | /* I think this bit is wrong. But doing it right here means | |
1181 | fixing bfd_perform_relocation, and verifying that it doesn't | |
1182 | break other targets. Sigh. | |
1183 | ||
1184 | Problem I'm trying to solve here: `ld -r' tends to get | |
1185 | offset of target symbol in output-file section put into | |
1186 | addend, but retains the original symbol, so the net | |
1187 | result is doubling of that offset. */ | |
1188 | if (!bfd_is_com_section (sym->section) | |
1189 | && sym->section != &bfd_und_section) | |
1190 | { | |
1191 | /* Could adjust either the offset or the symbol here. | |
1192 | I'm pretty indifferent. */ | |
1193 | sym = sym->section->symbol; | |
1194 | } | |
1195 | #endif | |
1196 | dst_rela.r_info | |
1197 | = ELF_R_INFO (elf_symbol_from_bfd_symbol (abfd, &sym), | |
1198 | ptr->howto->type); | |
244ffee7 | 1199 | |
32090b8e KR |
1200 | dst_rela.r_addend = ptr->addend; |
1201 | elf_swap_reloca_out (abfd, &dst_rela, src_rela); | |
1202 | malloc(0); | |
1203 | } | |
244ffee7 | 1204 | } |
32090b8e KR |
1205 | else |
1206 | /* REL relocations */ | |
1207 | { | |
1208 | outbound_relocs = (Elf_External_Rel *) rela_hdr->contents; | |
244ffee7 | 1209 | |
32090b8e KR |
1210 | for (idx = 0; idx < sec->reloc_count; idx++) |
1211 | { | |
1212 | Elf_Internal_Rel dst_rel; | |
1213 | Elf_External_Rel *src_rel; | |
1214 | arelent *ptr; | |
244ffee7 | 1215 | |
32090b8e KR |
1216 | ptr = sec->orelocation[idx]; |
1217 | src_rel = outbound_relocs + idx; | |
1218 | if (!(abfd->flags & EXEC_P)) | |
1219 | dst_rel.r_offset = ptr->address - sec->vma; | |
1220 | else | |
1221 | dst_rel.r_offset = ptr->address; | |
1222 | ||
1223 | dst_rel.r_info | |
1224 | = ELF_R_INFO (elf_symbol_from_bfd_symbol (abfd, ptr->sym_ptr_ptr), | |
1225 | ptr->howto->type); | |
1226 | ||
1227 | elf_swap_reloc_out (abfd, &dst_rel, src_rel); | |
1228 | ||
1229 | /* Update the addend -- FIXME add 64 bit support. */ | |
1230 | bfd_put_32 (abfd, ptr->addend, | |
1231 | (unsigned char *) (elf_section_data (sec)->this_hdr.contents) | |
1232 | + dst_rel.r_offset); | |
1233 | } | |
1234 | } | |
1235 | } | |
244ffee7 | 1236 | |
32090b8e KR |
1237 | static void |
1238 | fix_up_strtabs (abfd, asect, obj) | |
1239 | bfd *abfd; | |
1240 | asection *asect; | |
1241 | PTR obj; | |
1242 | { | |
1243 | Elf_Internal_Shdr *this_hdr = &elf_section_data (asect)->this_hdr; | |
1244 | int this_idx = elf_section_data(asect)->this_idx; | |
244ffee7 | 1245 | |
32090b8e KR |
1246 | /* @@ Check flags! */ |
1247 | if (!strncmp (asect->name, ".stab", 5) | |
1248 | && !strcmp ("str", asect->name + strlen (asect->name) - 3)) | |
1249 | { | |
1250 | size_t len = strlen (asect->name) + 1; | |
1251 | char *s = alloca (len); | |
1252 | strcpy (s, asect->name); | |
1253 | s[len - 4] = 0; | |
1254 | asect = bfd_get_section_by_name (abfd, s); | |
1255 | if (!asect) | |
1256 | abort (); | |
1257 | elf_section_data(asect)->this_hdr.sh_link = this_idx; | |
244ffee7 | 1258 | |
32090b8e KR |
1259 | /* @@ Assuming 32 bits! */ |
1260 | this_hdr->sh_entsize = 0xc; | |
244ffee7 | 1261 | } |
32090b8e | 1262 | } |
244ffee7 | 1263 | |
32090b8e KR |
1264 | static void |
1265 | DEFUN (elf_fake_sections, (abfd, asect, obj), | |
1266 | bfd * abfd AND | |
1267 | asection * asect AND | |
1268 | PTR obj) | |
1269 | { | |
1270 | /* most of what is in bfd_shdr_from_section goes in here... */ | |
1271 | /* and all of these sections generate at *least* one ELF section. */ | |
244ffee7 | 1272 | |
32090b8e KR |
1273 | Elf_Internal_Shdr *this_hdr; |
1274 | this_hdr = &elf_section_data (asect)->this_hdr; | |
1275 | this_hdr->sh_name = | |
1276 | bfd_add_to_strtab (abfd, elf_shstrtab (abfd), asect->name); | |
1277 | /* We need to log the type *now* so that elf_section_from_bfd_section | |
1278 | can find us... have to set rawdata too. */ | |
1279 | this_hdr->rawdata = (void *) asect; | |
1280 | this_hdr->sh_addralign = 1 << asect->alignment_power; | |
1281 | if ((asect->flags & SEC_ALLOC) && (asect->flags & SEC_LOAD)) | |
1282 | this_hdr->sh_type = SHT_PROGBITS; | |
1283 | /* @@ Select conditions correctly! */ | |
1284 | else if (!strcmp (asect->name, ".bss")) | |
1285 | this_hdr->sh_type = SHT_NOBITS; | |
1286 | else | |
1287 | /* what *do* we put here? */ | |
1288 | this_hdr->sh_type = SHT_PROGBITS; | |
1289 | ||
1290 | this_hdr->sh_flags = 0; | |
1291 | this_hdr->sh_addr = 0; | |
1292 | this_hdr->sh_size = 0; | |
1293 | this_hdr->sh_entsize = 0; | |
1294 | this_hdr->sh_info = 0; | |
1295 | this_hdr->sh_link = 0; | |
1296 | this_hdr->sh_offset = 0; | |
1297 | this_hdr->size = 0; | |
244ffee7 | 1298 | |
32090b8e KR |
1299 | { |
1300 | /* Emit a strtab and symtab, and possibly a reloc section. */ | |
1301 | Elf_Internal_Shdr *rela_hdr; | |
1302 | Elf_Internal_Shdr *symstrtab_hdr; | |
244ffee7 | 1303 | |
32090b8e KR |
1304 | /* Note that only one symtab is used, so just remember it |
1305 | for now. */ | |
244ffee7 | 1306 | |
32090b8e KR |
1307 | if ((asect->flags & SEC_RELOC) |
1308 | /* inconsistent flags... */ | |
1309 | && asect->reloc_count > 0) | |
1310 | { | |
1311 | int use_rela_p = get_elf_backend_data (abfd)->use_rela_p; | |
244ffee7 | 1312 | |
32090b8e KR |
1313 | rela_hdr = &elf_section_data (asect)->rel_hdr; |
1314 | rela_hdr->sh_name = | |
1315 | bfd_add_2_to_strtab (abfd, elf_shstrtab (abfd), | |
1316 | use_rela_p ? ".rela" : ".rel", | |
1317 | asect->name); | |
1318 | rela_hdr->sh_type = use_rela_p ? SHT_RELA : SHT_REL; | |
1319 | rela_hdr->sh_entsize = (use_rela_p | |
1320 | ? sizeof (Elf_External_Rela) | |
1321 | : sizeof (Elf_External_Rel)); | |
1322 | ||
1323 | rela_hdr->sh_flags = 0; | |
1324 | rela_hdr->sh_addr = 0; | |
1325 | rela_hdr->sh_size = 0; | |
1326 | rela_hdr->sh_offset = 0; | |
1327 | rela_hdr->sh_addralign = 0; | |
1328 | rela_hdr->size = 0; | |
1329 | } | |
1330 | } | |
1331 | if (asect->flags & SEC_ALLOC) | |
1332 | { | |
1333 | this_hdr->sh_flags |= SHF_ALLOC; | |
1334 | if (asect->flags & SEC_LOAD) | |
1335 | { | |
1336 | /* @@ Do something with sh_type? */ | |
1337 | } | |
1338 | } | |
1339 | if (!(asect->flags & SEC_READONLY)) | |
1340 | this_hdr->sh_flags |= SHF_WRITE; | |
1341 | if (asect->flags & SEC_CODE) | |
1342 | this_hdr->sh_flags |= SHF_EXECINSTR; | |
244ffee7 JK |
1343 | } |
1344 | ||
244ffee7 | 1345 | |
32090b8e KR |
1346 | /* |
1347 | xxxINTERNAL_FUNCTION | |
1348 | bfd_elf_locate_sh | |
244ffee7 | 1349 | |
32090b8e KR |
1350 | xxxSYNOPSIS |
1351 | struct elf_internal_shdr *bfd_elf_locate_sh (bfd *abfd, | |
1352 | struct strtab *strtab, | |
1353 | struct elf_internal_shdr *shdrp, | |
1354 | CONST char *name); | |
244ffee7 | 1355 | |
32090b8e KR |
1356 | xxxDESCRIPTION |
1357 | Helper function to locate an ELF section header given the | |
1358 | name of a BFD section. | |
1359 | */ | |
244ffee7 | 1360 | |
32090b8e KR |
1361 | static struct elfNAME (internal_shdr) * |
1362 | DEFUN (elf_locate_sh, (abfd, strtab, shdrp, name), | |
1363 | bfd * abfd AND | |
1364 | struct strtab *strtab AND | |
1365 | struct elfNAME (internal_shdr) *shdrp AND | |
1366 | CONST char *name) | |
1367 | { | |
1368 | Elf_Internal_Shdr *gotit = NULL; | |
1369 | int max, i; | |
244ffee7 | 1370 | |
32090b8e | 1371 | if (shdrp != NULL && strtab != NULL) |
244ffee7 | 1372 | { |
32090b8e KR |
1373 | max = elf_elfheader (abfd)->e_shnum; |
1374 | for (i = 1; i < max; i++) | |
1375 | { | |
1376 | if (!strcmp (strtab->tab + shdrp[i].sh_name, name)) | |
1377 | { | |
1378 | gotit = &shdrp[i]; | |
1379 | } | |
1380 | } | |
244ffee7 | 1381 | } |
32090b8e KR |
1382 | return gotit; |
1383 | } | |
244ffee7 | 1384 | |
32090b8e KR |
1385 | /* Map symbol from it's internal number to the external number, moving |
1386 | all local symbols to be at the head of the list. */ | |
244ffee7 | 1387 | |
32090b8e KR |
1388 | static INLINE int |
1389 | sym_is_global (sym) | |
1390 | asymbol *sym; | |
1391 | { | |
1392 | if (sym->flags & BSF_GLOBAL) | |
244ffee7 | 1393 | { |
32090b8e KR |
1394 | if (sym->flags & BSF_LOCAL) |
1395 | abort (); | |
1396 | return 1; | |
244ffee7 | 1397 | } |
32090b8e KR |
1398 | if (sym->section == &bfd_und_section) |
1399 | return 1; | |
1400 | if (bfd_is_com_section (sym->section)) | |
1401 | return 1; | |
1402 | if (sym->flags & (BSF_LOCAL | BSF_SECTION_SYM | BSF_FILE)) | |
1403 | return 0; | |
1404 | return 0; | |
1405 | } | |
244ffee7 | 1406 | |
32090b8e KR |
1407 | static void |
1408 | DEFUN (elf_map_symbols, (abfd), bfd * abfd) | |
1409 | { | |
1410 | int symcount = bfd_get_symcount (abfd); | |
1411 | asymbol **syms = bfd_get_outsymbols (abfd); | |
1412 | int num_locals = 0; | |
1413 | int num_globals = 0; | |
1414 | int num_locals2 = 0; | |
1415 | int num_globals2 = 0; | |
1416 | int num_sections = 0; | |
1417 | int *symtab_map; | |
1418 | int idx; | |
1419 | asection *asect; | |
6a3eb9b6 | 1420 | |
32090b8e KR |
1421 | #ifdef DEBUG |
1422 | fprintf (stderr, "elf_map_symbols\n"); | |
1423 | fflush (stderr); | |
1424 | #endif | |
244ffee7 | 1425 | |
32090b8e KR |
1426 | /* Add local symbols for each allocated section |
1427 | FIXME -- we should only put out symbols for sections that | |
1428 | are actually relocated against. */ | |
1429 | for (asect = abfd->sections; asect; asect = asect->next) | |
244ffee7 | 1430 | { |
32090b8e KR |
1431 | if (/*asect->flags & (SEC_LOAD | SEC_DATA | SEC_CODE)*/1) |
1432 | num_sections++; | |
244ffee7 JK |
1433 | } |
1434 | ||
32090b8e | 1435 | if (num_sections) |
244ffee7 | 1436 | { |
32090b8e KR |
1437 | if (syms) |
1438 | syms = (asymbol **) bfd_realloc (abfd, syms, | |
1439 | ((symcount + num_sections + 1) | |
1440 | * sizeof (asymbol *))); | |
1441 | else | |
1442 | syms = (asymbol **) bfd_alloc (abfd, | |
1443 | (num_sections + 1) * sizeof (asymbol *)); | |
244ffee7 | 1444 | |
32090b8e KR |
1445 | for (asect = abfd->sections; asect; asect = asect->next) |
1446 | { | |
1447 | if (/* asect->flags & (SEC_LOAD | SEC_DATA | SEC_CODE) */ 1) | |
1448 | { | |
1449 | asymbol *sym = syms[symcount++] = bfd_make_empty_symbol (abfd); | |
1450 | sym->the_bfd = abfd; | |
1451 | sym->name = asect->name; | |
1452 | sym->value = asect->vma; | |
1453 | sym->flags = BSF_SECTION_SYM; | |
1454 | sym->section = asect; | |
1455 | } | |
1456 | } | |
244ffee7 | 1457 | |
32090b8e KR |
1458 | syms[symcount] = (asymbol *) 0; |
1459 | bfd_set_symtab (abfd, syms, symcount); | |
1460 | } | |
244ffee7 | 1461 | |
32090b8e KR |
1462 | elf_symtab_map (abfd) = symtab_map |
1463 | = (int *) bfd_alloc (abfd, symcount * sizeof (int *)); | |
244ffee7 | 1464 | |
32090b8e KR |
1465 | /* Identify and classify all of the symbols. */ |
1466 | for (idx = 0; idx < symcount; idx++) | |
244ffee7 | 1467 | { |
32090b8e KR |
1468 | if (!sym_is_global (syms[idx])) |
1469 | num_locals++; | |
1470 | else | |
1471 | num_globals++; | |
244ffee7 | 1472 | } |
32090b8e KR |
1473 | |
1474 | /* Now provide mapping information. Add +1 for skipping over the | |
1475 | dummy symbol. */ | |
1476 | for (idx = 0; idx < symcount; idx++) | |
244ffee7 | 1477 | { |
32090b8e KR |
1478 | if (!sym_is_global (syms[idx])) |
1479 | symtab_map[idx] = 1 + num_locals2++; | |
1480 | else | |
1481 | symtab_map[idx] = 1 + num_locals + num_globals2++; | |
244ffee7 JK |
1482 | } |
1483 | ||
32090b8e KR |
1484 | elf_num_locals (abfd) = num_locals; |
1485 | elf_num_globals (abfd) = num_globals; | |
1486 | } | |
244ffee7 | 1487 | |
32090b8e KR |
1488 | static void assign_section_numbers (); |
1489 | static void assign_file_positions_except_relocs (); | |
244ffee7 | 1490 | |
32090b8e KR |
1491 | static boolean |
1492 | DEFUN (elf_compute_section_file_positions, (abfd), bfd * abfd) | |
1493 | { | |
1494 | Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */ | |
1495 | Elf_Internal_Shdr *i_shdrp; /* Section header table, internal form */ | |
1496 | struct strtab *shstrtab; | |
1497 | int count, maxsections; | |
244ffee7 | 1498 | |
32090b8e | 1499 | bfd_map_over_sections (abfd, elf_fake_sections, 0); |
244ffee7 | 1500 | |
32090b8e | 1501 | assign_section_numbers (abfd); |
244ffee7 | 1502 | |
32090b8e | 1503 | bfd_map_over_sections (abfd, elf_make_sections, 0); |
244ffee7 | 1504 | |
32090b8e | 1505 | bfd_map_over_sections (abfd, fix_up_strtabs, 0); /* .stab/.stabstr &c */ |
244ffee7 | 1506 | |
32090b8e | 1507 | swap_out_syms (abfd); |
244ffee7 | 1508 | |
32090b8e KR |
1509 | assign_file_positions_except_relocs (abfd); |
1510 | ||
1511 | return true; | |
1512 | } | |
1513 | ||
1514 | static boolean | |
1515 | DEFUN (elf_write_phdrs, (abfd, i_ehdrp, i_phdrp, phdr_cnt), | |
1516 | bfd * abfd AND | |
1517 | Elf_Internal_Ehdr * i_ehdrp AND | |
1518 | Elf_Internal_Phdr * i_phdrp AND | |
1519 | Elf32_Half phdr_cnt) | |
244ffee7 | 1520 | { |
32090b8e KR |
1521 | /* first program header entry goes after the file header */ |
1522 | int outbase = i_ehdrp->e_ehsize; | |
244ffee7 | 1523 | int i; |
32090b8e KR |
1524 | Elf_External_Phdr x_phdr; |
1525 | ||
1526 | for (i = 0; i < phdr_cnt; i++) | |
244ffee7 | 1527 | { |
32090b8e KR |
1528 | elf_swap_phdr_out (abfd, i_phdrp + i, &x_phdr); |
1529 | bfd_seek (abfd, outbase, SEEK_SET); | |
1530 | bfd_write ((PTR) & x_phdr, sizeof (x_phdr), 1, abfd); | |
1531 | outbase += sizeof (x_phdr); | |
244ffee7 | 1532 | } |
32090b8e KR |
1533 | |
1534 | return true; | |
244ffee7 JK |
1535 | } |
1536 | ||
32090b8e KR |
1537 | static Elf_Internal_Phdr * |
1538 | DEFUN (elf_build_phdrs, (abfd, i_ehdrp, i_shdrp, phdr_cnt), | |
244ffee7 | 1539 | bfd * abfd AND |
32090b8e KR |
1540 | Elf_Internal_Ehdr * i_ehdrp AND |
1541 | Elf_Internal_Shdr * i_shdrp AND | |
1542 | Elf32_Half * phdr_cnt) | |
244ffee7 | 1543 | { |
32090b8e | 1544 | Elf_Internal_Phdr *phdr_buf; |
244ffee7 | 1545 | int idx; |
32090b8e KR |
1546 | /* NOTES: |
1547 | 1. The program header table is *not* loaded as part | |
1548 | of the memory image of the program. If this | |
1549 | changes later, the PT_PHDR entry must come first. | |
1550 | 2. there is currently no support for program header | |
1551 | entries of type PT_PHDR, PT_DYNAMIC, PT_INTERP, | |
1552 | or PT_SHLIB. */ | |
244ffee7 | 1553 | |
32090b8e KR |
1554 | /* A. Figure out how many program header table entries are needed |
1555 | 1. PT_LOAD for the text segment | |
1556 | 2. PT_LOAD for the data segment | |
1557 | Then, reserve space for one more pointer. This will be NULL | |
1558 | to indicate the end of the program header table. */ | |
244ffee7 | 1559 | |
32090b8e KR |
1560 | #ifdef PHDRS_INCLUDED |
1561 | *phdr_cnt = 4; | |
1562 | #else | |
1563 | /* XXX right now, execve() expects exactly 3 PT entries on HPPA-OSF. */ | |
1564 | *phdr_cnt = 3; | |
1565 | #endif | |
244ffee7 | 1566 | |
32090b8e KR |
1567 | phdr_buf = (Elf_Internal_Phdr *) bfd_xmalloc (((*phdr_cnt) + 1) |
1568 | * | |
1569 | sizeof (Elf_Internal_Phdr)); | |
244ffee7 | 1570 | |
32090b8e KR |
1571 | idx = 0; |
1572 | #ifdef PHDRS_INCLUDED | |
1573 | /* B. Fill in the PT_PHDR entry. */ | |
244ffee7 | 1574 | |
32090b8e KR |
1575 | idx++; |
1576 | #endif | |
244ffee7 | 1577 | |
32090b8e | 1578 | /* C. Fill in the PT_LOAD entry for the text segment. */ |
fce36137 | 1579 | |
32090b8e | 1580 | phdr_buf[idx].p_type = PT_LOAD; |
6a3eb9b6 | 1581 | |
32090b8e KR |
1582 | /* get virtual/physical address from .text section */ |
1583 | phdr_buf[idx].p_vaddr = bfd_get_section_by_name (abfd, ".text")->vma; | |
1584 | phdr_buf[idx].p_paddr = 0; /* XXX */ | |
6a3eb9b6 | 1585 | |
32090b8e KR |
1586 | /* Ultimately, we would like the size of the .text load |
1587 | segment to be the sum of the following sections: | |
1588 | the program header table itself | |
1589 | .interp | |
1590 | .hash | |
1591 | .dynsym | |
1592 | .dynstr | |
1593 | .rela.bss | |
1594 | .rela.plt | |
1595 | .init | |
1596 | .text | |
1597 | .fini | |
1598 | .rodata | |
1599 | But, right now, it will be the sum of the following sections: | |
1600 | .text | |
1601 | .rodata */ | |
244ffee7 | 1602 | |
32090b8e KR |
1603 | { |
1604 | static char *CONST ld_sect_names[] = | |
1605 | {".text", ".rodata", NULL}; | |
1606 | int i; | |
1607 | int ld_size = 0; | |
1608 | ||
1609 | for (i = 0; ld_sect_names[i]; i++) | |
1610 | { | |
1611 | asection *asect = bfd_get_section_by_name (abfd, | |
1612 | ld_sect_names[i]); | |
1613 | ||
1614 | if (asect) | |
1615 | ld_size += bfd_section_size (abfd, asect); | |
1616 | } | |
1617 | phdr_buf[idx].p_filesz = ld_size; | |
1618 | /* XXX: need to fix this */ | |
1619 | phdr_buf[idx].p_memsz = ld_size; | |
1620 | } | |
1621 | phdr_buf[idx].p_flags = PF_R + PF_X; | |
1622 | phdr_buf[idx].p_align = | |
1623 | bfd_get_section_by_name (abfd, ".text")->alignment_power; | |
1624 | ||
1625 | idx++; | |
1626 | ||
1627 | /* D. Fill in the PT_LOAD entry for the data segment. */ | |
1628 | ||
1629 | phdr_buf[idx].p_type = PT_LOAD; | |
1630 | ||
1631 | /* get virtual/physical address from .data section */ | |
1632 | phdr_buf[idx].p_vaddr = bfd_get_section_by_name (abfd, ".data")->vma; | |
1633 | phdr_buf[idx].p_paddr = 0; /* XXX */ | |
1634 | ||
1635 | /* Ultimately, we would like the size of the data load segment | |
1636 | to be the sum of the following sections: | |
1637 | the PT_DYNAMIC program header table entry | |
1638 | .plt | |
1639 | .data | |
1640 | .data1 | |
1641 | .got | |
1642 | .dynamic | |
1643 | But, right now, it will be the sum of the following sections: | |
1644 | .data */ | |
1645 | ||
1646 | { | |
1647 | static char *CONST ld_sect_names[] = | |
1648 | {".data", NULL}; | |
1649 | int i; | |
1650 | int ld_size = 0; | |
1651 | ||
1652 | for (i = 0; ld_sect_names[i]; i++) | |
1653 | { | |
1654 | asection *asect = bfd_get_section_by_name (abfd, | |
1655 | ld_sect_names[i]); | |
1656 | ||
1657 | if (asect) | |
1658 | ld_size += bfd_section_size (abfd, asect); | |
1659 | } | |
1660 | phdr_buf[idx].p_filesz = ld_size; | |
1661 | /* XXX: need to fix this */ | |
1662 | phdr_buf[idx].p_memsz = ld_size; | |
1663 | } | |
1664 | phdr_buf[idx].p_flags = PF_R + PF_W + PF_X; | |
1665 | phdr_buf[idx].p_align | |
1666 | = bfd_get_section_by_name (abfd, ".data")->alignment_power; | |
1667 | ||
1668 | idx++; | |
1669 | ||
1670 | /* E. Fill in the PT_LOAD entry for the bss segment. */ | |
1671 | ||
1672 | phdr_buf[idx].p_type = PT_LOAD; | |
1673 | ||
1674 | /* get virtual/physical address from .data section */ | |
1675 | phdr_buf[idx].p_vaddr = bfd_get_section_by_name (abfd, ".bss")->vma; | |
1676 | phdr_buf[idx].p_paddr = 0; /* XXX */ | |
1677 | ||
1678 | { | |
1679 | static char *CONST ld_sect_names[] = | |
1680 | {".bss", NULL}; | |
1681 | int i; | |
1682 | int ld_size = 0; | |
1683 | ||
1684 | for (i = 0; ld_sect_names[i]; i++) | |
1685 | { | |
1686 | asection *asect = bfd_get_section_by_name (abfd, | |
1687 | ld_sect_names[i]); | |
1688 | ||
1689 | if (asect) | |
1690 | ld_size += bfd_section_size (abfd, asect); | |
1691 | } | |
1692 | phdr_buf[idx].p_filesz = 0; | |
1693 | /* XXX: need to fix this */ | |
1694 | phdr_buf[idx].p_memsz = ld_size; | |
1695 | } | |
1696 | phdr_buf[idx].p_flags = PF_R + PF_W + PF_X; | |
1697 | phdr_buf[idx].p_align | |
1698 | = bfd_get_section_by_name (abfd, ".bss")->alignment_power; | |
1699 | ||
1700 | idx++; | |
1701 | ||
1702 | /* F. Set up the "end of program header table" sentinel. */ | |
1703 | ||
1704 | memset ((char *) (phdr_buf + idx), 0, sizeof (Elf_Internal_Phdr)); | |
1705 | idx++; | |
1706 | ||
1707 | BFD_ASSERT (idx - 1 == *phdr_cnt); | |
1708 | ||
1709 | return phdr_buf; | |
fce36137 | 1710 | } |
244ffee7 | 1711 | |
32090b8e KR |
1712 | static const Elf_Internal_Shdr null_shdr; |
1713 | ||
1714 | /* Assign all ELF section numbers. The dummy first section is handled here | |
1715 | too. The link/info pointers for the standard section types are filled | |
1716 | in here too, while we're at it. (Link pointers for .stab sections are | |
1717 | not filled in here.) */ | |
fce36137 | 1718 | static void |
32090b8e | 1719 | assign_section_numbers (abfd) |
fce36137 | 1720 | bfd *abfd; |
fce36137 | 1721 | { |
32090b8e KR |
1722 | struct elf_obj_tdata *t = elf_tdata (abfd); |
1723 | asection *sec; | |
1724 | int section_number = 1; | |
1725 | int i; | |
1726 | Elf_Internal_Shdr **i_shdrp; | |
244ffee7 | 1727 | |
32090b8e KR |
1728 | t->shstrtab_hdr.sh_size = elf_shstrtab(abfd)->length; |
1729 | t->shstrtab_hdr.contents = (void *) elf_shstrtab(abfd)->tab; | |
1730 | shstrtab_length_fixed = 1; | |
244ffee7 | 1731 | |
32090b8e KR |
1732 | t->shstrtab_section = section_number++; |
1733 | elf_elfheader(abfd)->e_shstrndx = t->shstrtab_section; | |
1734 | if (abfd->symcount) | |
1735 | { | |
1736 | t->symtab_section = section_number++; | |
1737 | t->strtab_section = section_number++; | |
1738 | t->symtab_hdr.sh_link = t->strtab_section; | |
1739 | } | |
1740 | for (sec = abfd->sections; sec; sec = sec->next) | |
1741 | { | |
1742 | struct bfd_elf_section_data *d = elf_section_data (sec); | |
1743 | d->this_idx = section_number++; | |
1744 | if (sec->reloc_count != 0) | |
fce36137 | 1745 | { |
32090b8e KR |
1746 | d->rel_idx = section_number++; |
1747 | d->rel_hdr.sh_link = t->symtab_section; | |
1748 | d->rel_hdr.sh_info = d->this_idx; | |
244ffee7 | 1749 | } |
fce36137 | 1750 | else |
32090b8e KR |
1751 | d->rel_idx = 0; |
1752 | /* No handling for per-section string tables currently. */ | |
1753 | } | |
1754 | elf_elfheader(abfd)->e_shnum = section_number; | |
1755 | ||
1756 | /* Set up the list of section header pointers, in agreement with the | |
1757 | indices. */ | |
1758 | i_shdrp = bfd_alloc (abfd, | |
1759 | section_number * sizeof (Elf_Internal_Shdr *)); | |
1760 | elf_elfsections(abfd) = i_shdrp; | |
1761 | for (i = 0; i < section_number; i++) | |
1762 | i_shdrp[i] = 0; | |
1763 | ||
1764 | i_shdrp[0] = (Elf_Internal_Shdr *) &null_shdr; | |
1765 | i_shdrp[t->shstrtab_section] = &t->shstrtab_hdr; | |
1766 | if (abfd->symcount) | |
1767 | { | |
1768 | i_shdrp[t->symtab_section] = &t->symtab_hdr; | |
1769 | i_shdrp[t->strtab_section] = &t->strtab_hdr; | |
244ffee7 | 1770 | } |
32090b8e KR |
1771 | for (sec = abfd->sections; sec; sec = sec->next) |
1772 | { | |
1773 | struct bfd_elf_section_data *d = elf_section_data (sec); | |
1774 | i_shdrp[d->this_idx] = &d->this_hdr; | |
1775 | if (d->rel_idx) | |
1776 | i_shdrp[d->rel_idx] = &d->rel_hdr; | |
1777 | } | |
1778 | /* Make sure we got everything.... */ | |
1779 | for (i = 0; i < section_number; i++) | |
1780 | if (i_shdrp[i] == 0) | |
1781 | abort (); | |
1782 | } | |
1783 | ||
1784 | static INLINE file_ptr | |
1785 | assign_file_position_for_section (i_shdrp, offset) | |
1786 | Elf_Internal_Shdr *i_shdrp; | |
1787 | file_ptr offset; | |
1788 | { | |
1789 | i_shdrp->sh_offset = offset; | |
1790 | offset += i_shdrp->sh_size; | |
1791 | return offset; | |
244ffee7 JK |
1792 | } |
1793 | ||
1794 | static void | |
32090b8e KR |
1795 | assign_file_positions_except_relocs (abfd) |
1796 | bfd *abfd; | |
244ffee7 | 1797 | { |
32090b8e KR |
1798 | /* For now, we ignore the possibility of having program segments, which |
1799 | may require some alignment in the file. That'll require padding, and | |
1800 | some interesting calculations to optimize file space usage. | |
244ffee7 | 1801 | |
32090b8e KR |
1802 | Also, since the application may change the list of relocations for |
1803 | a given section, we don't figure them in here. We'll put them at the | |
1804 | end of the file, at positions computed during bfd_close. | |
244ffee7 | 1805 | |
32090b8e KR |
1806 | The order, for now: <ehdr> <shdr> <sec1> <sec2> <sec3> ... <rel1> ... */ |
1807 | ||
1808 | file_ptr off; | |
1809 | int i; | |
1810 | Elf_Internal_Shdr **i_shdrpp = elf_elfsections (abfd); | |
1811 | Elf_Internal_Shdr *i_shdrp; | |
1812 | Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd); | |
1813 | ||
1814 | off = i_ehdrp->e_ehsize; | |
1815 | i_ehdrp->e_shoff = off; | |
1816 | off += i_ehdrp->e_shnum * i_ehdrp->e_shentsize; | |
1817 | off = assign_file_position_for_section (&elf_tdata(abfd)->shstrtab_hdr, off); | |
1818 | off = assign_file_position_for_section (&elf_tdata(abfd)->symtab_hdr, off); | |
1819 | off = assign_file_position_for_section (&elf_tdata(abfd)->strtab_hdr, off); | |
1820 | for (i = 0; i < i_ehdrp->e_shnum; i++) | |
1821 | { | |
1822 | i_shdrp = i_shdrpp[i]; | |
1823 | if (i_shdrp->sh_type == SHT_REL || i_shdrp->sh_type == SHT_RELA) | |
244ffee7 | 1824 | { |
32090b8e KR |
1825 | i_shdrp->sh_offset = -1; |
1826 | continue; | |
244ffee7 | 1827 | } |
32090b8e | 1828 | off = assign_file_position_for_section (i_shdrp, off); |
244ffee7 | 1829 | } |
32090b8e | 1830 | elf_tdata (abfd)->next_file_pos = off; |
244ffee7 JK |
1831 | } |
1832 | ||
32090b8e KR |
1833 | static boolean |
1834 | prep_headers (abfd) | |
1835 | bfd *abfd; | |
1836 | { | |
1837 | Elf_External_Ehdr x_ehdr; /* Elf file header, external form */ | |
1838 | Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */ | |
1839 | Elf_Internal_Phdr *i_phdrp = 0; /* Program header table, internal form */ | |
1840 | Elf_External_Shdr *x_shdrp; /* Section header table, external form */ | |
1841 | Elf_Internal_Shdr **i_shdrp; /* Section header table, internal form */ | |
244ffee7 | 1842 | |
32090b8e KR |
1843 | int count; |
1844 | int scnt; | |
1845 | struct strtab *shstrtab; | |
244ffee7 | 1846 | |
32090b8e KR |
1847 | i_ehdrp = elf_elfheader (abfd); |
1848 | i_shdrp = elf_elfsections (abfd); | |
244ffee7 | 1849 | |
32090b8e KR |
1850 | shstrtab = bfd_new_strtab (abfd); |
1851 | elf_shstrtab (abfd) = shstrtab; | |
244ffee7 | 1852 | |
32090b8e KR |
1853 | i_ehdrp->e_ident[EI_MAG0] = ELFMAG0; |
1854 | i_ehdrp->e_ident[EI_MAG1] = ELFMAG1; | |
1855 | i_ehdrp->e_ident[EI_MAG2] = ELFMAG2; | |
1856 | i_ehdrp->e_ident[EI_MAG3] = ELFMAG3; | |
244ffee7 | 1857 | |
32090b8e KR |
1858 | i_ehdrp->e_ident[EI_CLASS] = ELFCLASS; |
1859 | i_ehdrp->e_ident[EI_DATA] = | |
1860 | abfd->xvec->byteorder_big_p ? ELFDATA2MSB : ELFDATA2LSB; | |
1861 | i_ehdrp->e_ident[EI_VERSION] = EV_CURRENT; | |
244ffee7 | 1862 | |
32090b8e KR |
1863 | for (count = EI_PAD; count < EI_NIDENT; count++) |
1864 | i_ehdrp->e_ident[count] = 0; | |
244ffee7 | 1865 | |
32090b8e KR |
1866 | i_ehdrp->e_type = (abfd->flags & EXEC_P) ? ET_EXEC : ET_REL; |
1867 | switch (bfd_get_arch (abfd)) | |
fce36137 | 1868 | { |
32090b8e KR |
1869 | case bfd_arch_unknown: |
1870 | i_ehdrp->e_machine = EM_NONE; | |
1871 | break; | |
1872 | case bfd_arch_sparc: | |
1873 | i_ehdrp->e_machine = EM_SPARC; | |
1874 | /* start-sanitize-v9 */ | |
1875 | #if ARCH_SIZE == 64 | |
1876 | i_ehdrp->e_machine = EM_SPARC64; | |
1877 | #endif | |
1878 | /* end-sanitize-v9 */ | |
1879 | break; | |
1880 | case bfd_arch_i386: | |
1881 | i_ehdrp->e_machine = EM_386; | |
1882 | break; | |
1883 | case bfd_arch_m68k: | |
1884 | i_ehdrp->e_machine = EM_68K; | |
1885 | break; | |
1886 | case bfd_arch_m88k: | |
1887 | i_ehdrp->e_machine = EM_88K; | |
1888 | break; | |
1889 | case bfd_arch_i860: | |
1890 | i_ehdrp->e_machine = EM_860; | |
1891 | break; | |
1892 | case bfd_arch_mips: /* MIPS Rxxxx */ | |
1893 | i_ehdrp->e_machine = EM_MIPS; /* only MIPS R3000 */ | |
1894 | break; | |
1895 | case bfd_arch_hppa: | |
1896 | i_ehdrp->e_machine = EM_HPPA; | |
1897 | break; | |
1898 | /* also note that EM_M32, AT&T WE32100 is unknown to bfd */ | |
1899 | default: | |
1900 | i_ehdrp->e_machine = EM_NONE; | |
fce36137 | 1901 | } |
32090b8e KR |
1902 | i_ehdrp->e_version = EV_CURRENT; |
1903 | i_ehdrp->e_ehsize = sizeof (Elf_External_Ehdr); | |
244ffee7 | 1904 | |
32090b8e KR |
1905 | /* no program header, for now. */ |
1906 | i_ehdrp->e_phoff = 0; | |
1907 | i_ehdrp->e_phentsize = 0; | |
1908 | i_ehdrp->e_phnum = 0; | |
244ffee7 | 1909 | |
32090b8e KR |
1910 | /* each bfd section is section header entry */ |
1911 | i_ehdrp->e_entry = bfd_get_start_address (abfd); | |
1912 | i_ehdrp->e_shentsize = sizeof (Elf_External_Shdr); | |
244ffee7 | 1913 | |
32090b8e KR |
1914 | /* if we're building an executable, we'll need a program header table */ |
1915 | if (abfd->flags & EXEC_P) | |
244ffee7 | 1916 | { |
32090b8e | 1917 | abort (); |
244ffee7 | 1918 | |
32090b8e KR |
1919 | #if 0 |
1920 | i_ehdrp->e_phentsize = sizeof (Elf_External_Phdr); | |
244ffee7 | 1921 | |
32090b8e KR |
1922 | /* elf_build_phdrs() returns a (NULL-terminated) array of |
1923 | Elf_Internal_Phdrs */ | |
1924 | i_phdrp = elf_build_phdrs (abfd, i_ehdrp, i_shdrp, &i_ehdrp->e_phnum); | |
1925 | i_ehdrp->e_phoff = outbase; | |
1926 | outbase += i_ehdrp->e_phentsize * i_ehdrp->e_phnum; | |
1927 | #endif | |
244ffee7 | 1928 | } |
32090b8e | 1929 | else |
244ffee7 | 1930 | { |
32090b8e KR |
1931 | i_ehdrp->e_phentsize = 0; |
1932 | i_phdrp = 0; | |
1933 | i_ehdrp->e_phoff = 0; | |
244ffee7 JK |
1934 | } |
1935 | ||
32090b8e KR |
1936 | elf_tdata (abfd)->symtab_hdr.sh_name = bfd_add_to_strtab (abfd, shstrtab, |
1937 | ".symtab"); | |
1938 | elf_tdata (abfd)->strtab_hdr.sh_name = bfd_add_to_strtab (abfd, shstrtab, | |
1939 | ".strtab"); | |
1940 | elf_tdata (abfd)->shstrtab_hdr.sh_name = bfd_add_to_strtab (abfd, shstrtab, | |
1941 | ".shstrtab"); | |
244ffee7 | 1942 | |
244ffee7 JK |
1943 | } |
1944 | ||
32090b8e KR |
1945 | static void |
1946 | swap_out_syms (abfd) | |
1947 | bfd *abfd; | |
244ffee7 | 1948 | { |
32090b8e | 1949 | struct strtab *shstrtab = elf_shstrtab (abfd); |
244ffee7 | 1950 | |
32090b8e | 1951 | elf_map_symbols (abfd); |
244ffee7 | 1952 | |
32090b8e KR |
1953 | /* Dump out the symtabs. */ |
1954 | { | |
1955 | int symcount = bfd_get_symcount (abfd); | |
1956 | asymbol **syms = bfd_get_outsymbols (abfd); | |
1957 | struct strtab *stt = bfd_new_strtab (abfd); | |
1958 | Elf_Internal_Shdr *symtab_hdr; | |
1959 | Elf_Internal_Shdr *symstrtab_hdr; | |
1960 | Elf_External_Sym *outbound_syms; | |
1961 | int idx; | |
244ffee7 | 1962 | |
32090b8e KR |
1963 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
1964 | symtab_hdr->sh_type = SHT_SYMTAB; | |
1965 | symtab_hdr->sh_entsize = sizeof (Elf_External_Sym); | |
1966 | symtab_hdr->sh_size = symtab_hdr->sh_entsize * (symcount + 1); | |
1967 | symtab_hdr->sh_info = elf_num_locals (abfd) + 1; | |
244ffee7 | 1968 | |
32090b8e KR |
1969 | /* see assert in elf_fake_sections that supports this: */ |
1970 | symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr; | |
1971 | symstrtab_hdr->sh_type = SHT_STRTAB; | |
244ffee7 | 1972 | |
32090b8e KR |
1973 | outbound_syms = (Elf_External_Sym *) |
1974 | bfd_alloc (abfd, (1 + symcount) * sizeof (Elf_External_Sym)); | |
1975 | /* now generate the data (for "contents") */ | |
1976 | { | |
1977 | /* Fill in zeroth symbol and swap it out. */ | |
1978 | Elf_Internal_Sym sym; | |
1979 | sym.st_name = 0; | |
1980 | sym.st_value = 0; | |
1981 | sym.st_size = 0; | |
1982 | sym.st_info = 0; | |
1983 | sym.st_other = 0; | |
1984 | sym.st_shndx = SHN_UNDEF; | |
1985 | elf_swap_symbol_out (abfd, &sym, outbound_syms); | |
244ffee7 | 1986 | } |
32090b8e KR |
1987 | for (idx = 0; idx < symcount; idx++) |
1988 | { | |
1989 | Elf_Internal_Sym sym; | |
1990 | bfd_vma value = syms[idx]->value; | |
244ffee7 | 1991 | |
32090b8e KR |
1992 | if (syms[idx]->flags & BSF_SECTION_SYM) |
1993 | /* Section symbols have no names. */ | |
1994 | sym.st_name = 0; | |
1995 | else | |
1996 | sym.st_name = bfd_add_to_strtab (abfd, stt, syms[idx]->name); | |
244ffee7 | 1997 | |
32090b8e | 1998 | if (bfd_is_com_section (syms[idx]->section)) |
244ffee7 | 1999 | { |
32090b8e KR |
2000 | /* ELF common symbols put the alignment into the `value' field, |
2001 | and the size into the `size' field. This is backwards from | |
2002 | how BFD handles it, so reverse it here. */ | |
2003 | sym.st_size = value; | |
2004 | /* Should retrieve this from somewhere... */ | |
2005 | sym.st_value = 16; | |
2006 | sym.st_shndx = SHN_COMMON; | |
244ffee7 JK |
2007 | } |
2008 | else | |
2009 | { | |
32090b8e KR |
2010 | asection *sec = syms[idx]->section; |
2011 | int shndx; | |
244ffee7 | 2012 | |
32090b8e KR |
2013 | if (sec->output_section) |
2014 | { | |
2015 | value += sec->output_offset; | |
2016 | sec = sec->output_section; | |
2017 | } | |
2018 | value += sec->vma; | |
2019 | sym.st_value = value; | |
2020 | sym.st_size = (elf_symbol_from (abfd, syms[idx]))->internal_elf_sym.st_size; | |
2021 | sym.st_shndx = shndx = elf_section_from_bfd_section (abfd, sec); | |
2022 | if (shndx == -1) | |
2023 | { | |
2024 | asection *sec2; | |
2025 | /* Writing this would be a hell of a lot easier if we had | |
2026 | some decent documentation on bfd, and knew what to expect | |
2027 | of the library, and what to demand of applications. For | |
2028 | example, it appears that `objcopy' might not set the | |
2029 | section of a symbol to be a section that is actually in | |
2030 | the output file. */ | |
2031 | sec2 = bfd_get_section_by_name (abfd, sec->name); | |
2032 | assert (sec2 != 0); | |
2033 | sym.st_shndx = shndx = elf_section_from_bfd_section (abfd, sec2); | |
2034 | assert (shndx != -1); | |
2035 | } | |
2036 | } | |
244ffee7 | 2037 | |
32090b8e KR |
2038 | if (bfd_is_com_section (syms[idx]->section)) |
2039 | sym.st_info = ELF_ST_INFO (STB_GLOBAL, STT_NOTYPE); | |
2040 | else if (syms[idx]->section == &bfd_und_section) | |
2041 | sym.st_info = ELF_ST_INFO (STB_GLOBAL, STT_NOTYPE); | |
2042 | else if (syms[idx]->flags & BSF_WEAK) | |
2043 | sym.st_info = ELF_ST_INFO (STB_WEAK, STT_OBJECT); | |
2044 | else if (syms[idx]->flags & BSF_SECTION_SYM) | |
2045 | sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION); | |
2046 | else if (syms[idx]->flags & BSF_FILE) | |
2047 | sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE); | |
2048 | else if (syms[idx]->flags & (BSF_GLOBAL | BSF_EXPORT)) | |
2049 | { | |
2050 | if (syms[idx]->flags & BSF_FUNCTION) | |
2051 | sym.st_info = ELF_ST_INFO (STB_GLOBAL, STT_FUNC); | |
2052 | else | |
2053 | sym.st_info = ELF_ST_INFO (STB_GLOBAL, STT_OBJECT); | |
2054 | } | |
2055 | else if (syms[idx]->flags & BSF_LOCAL) | |
2056 | { | |
2057 | if (syms[idx]->flags & BSF_FUNCTION) | |
2058 | sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FUNC); | |
2059 | else | |
2060 | sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_OBJECT); | |
2061 | } | |
2062 | else | |
2063 | /* Default to local if flag isn't set at all. */ | |
2064 | sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_OBJECT); | |
244ffee7 | 2065 | |
32090b8e KR |
2066 | sym.st_other = 0; |
2067 | elf_swap_symbol_out (abfd, &sym, | |
2068 | outbound_syms + elf_symtab_map (abfd)[idx]); | |
2069 | } | |
2070 | ||
2071 | symtab_hdr->contents = (PTR) outbound_syms; | |
2072 | symstrtab_hdr->contents = (PTR) stt->tab; | |
2073 | symstrtab_hdr->sh_size = stt->length; | |
2074 | symstrtab_hdr->sh_type = SHT_STRTAB; | |
2075 | ||
2076 | symstrtab_hdr->sh_flags = 0; | |
2077 | symstrtab_hdr->sh_addr = 0; | |
2078 | symstrtab_hdr->sh_entsize = 0; | |
2079 | symstrtab_hdr->sh_link = 0; | |
2080 | symstrtab_hdr->sh_info = 0; | |
2081 | symstrtab_hdr->sh_addralign = 0; | |
2082 | symstrtab_hdr->size = 0; | |
2083 | } | |
2084 | ||
2085 | /* put the strtab out too... */ | |
2086 | { | |
2087 | Elf_Internal_Shdr *this_hdr; | |
2088 | ||
2089 | this_hdr = &elf_tdata(abfd)->shstrtab_hdr; | |
2090 | this_hdr->contents = (PTR) elf_shstrtab (abfd)->tab; | |
2091 | this_hdr->sh_size = elf_shstrtab (abfd)->length; | |
2092 | this_hdr->sh_type = SHT_STRTAB; | |
2093 | this_hdr->sh_flags = 0; | |
2094 | this_hdr->sh_addr = 0; | |
2095 | this_hdr->sh_entsize = 0; | |
2096 | this_hdr->sh_addralign = 0; | |
2097 | this_hdr->size = 0; | |
2098 | } | |
244ffee7 JK |
2099 | } |
2100 | ||
32090b8e KR |
2101 | static boolean |
2102 | write_shdrs_and_ehdr (abfd) | |
2103 | bfd *abfd; | |
244ffee7 | 2104 | { |
32090b8e KR |
2105 | Elf_External_Ehdr x_ehdr; /* Elf file header, external form */ |
2106 | Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */ | |
2107 | Elf_Internal_Phdr *i_phdrp = 0; /* Program header table, internal form */ | |
2108 | Elf_External_Shdr *x_shdrp; /* Section header table, external form */ | |
2109 | Elf_Internal_Shdr **i_shdrp; /* Section header table, internal form */ | |
244ffee7 | 2110 | |
32090b8e KR |
2111 | int count; |
2112 | int scnt; | |
2113 | struct strtab *shstrtab; | |
244ffee7 | 2114 | |
32090b8e KR |
2115 | i_ehdrp = elf_elfheader (abfd); |
2116 | i_shdrp = elf_elfsections (abfd); | |
2117 | shstrtab = elf_shstrtab (abfd); | |
2118 | ||
2119 | /* swap the header before spitting it out... */ | |
2120 | ||
2121 | #if DEBUG & 1 | |
2122 | elf_debug_file (i_ehdrp); | |
244ffee7 | 2123 | #endif |
32090b8e KR |
2124 | elf_swap_ehdr_out (abfd, i_ehdrp, &x_ehdr); |
2125 | bfd_seek (abfd, (file_ptr) 0, SEEK_SET); | |
2126 | bfd_write ((PTR) & x_ehdr, sizeof (x_ehdr), 1, abfd); | |
244ffee7 | 2127 | |
32090b8e KR |
2128 | /* If we're building an executable, fixup the program header table |
2129 | offsets. | |
244ffee7 | 2130 | |
32090b8e KR |
2131 | @@ For now, assume that the entries are in a fixed order: text, |
2132 | data, bss. FIXME */ | |
244ffee7 | 2133 | |
32090b8e KR |
2134 | if (abfd->flags & EXEC_P) |
2135 | { | |
2136 | static char *CONST section_name[] = | |
2137 | {".text", ".data", ".bss"}; | |
2138 | ||
2139 | for (count = 0; count < 3; count++) | |
2140 | { | |
2141 | asection *asect = bfd_get_section_by_name (abfd, | |
2142 | section_name[count]); | |
2143 | int sh_idx = elf_section_from_bfd_section (abfd, asect); | |
2144 | ||
2145 | i_phdrp[count].p_offset = i_shdrp[sh_idx]->sh_offset; | |
2146 | } | |
2147 | ||
2148 | /* write out the program header table entries */ | |
2149 | elf_write_phdrs (abfd, i_ehdrp, i_phdrp, i_ehdrp->e_phnum); | |
2150 | } | |
2151 | ||
2152 | /* at this point we've concocted all the ELF sections... */ | |
2153 | x_shdrp = (Elf_External_Shdr *) | |
2154 | bfd_alloc (abfd, sizeof (*x_shdrp) * (i_ehdrp->e_shnum)); | |
2155 | if (!x_shdrp) | |
2156 | { | |
2157 | bfd_error = no_memory; | |
2158 | return false; | |
2159 | } | |
2160 | ||
2161 | for (count = 0; count < i_ehdrp->e_shnum; count++) | |
2162 | { | |
2163 | #if DEBUG & 2 | |
2164 | elf_debug_section (shstrtab->tab + i_shdrp[count]->sh_name, count, | |
2165 | i_shdrp[count]); | |
244ffee7 | 2166 | #endif |
32090b8e KR |
2167 | elf_swap_shdr_out (abfd, i_shdrp[count], x_shdrp + count); |
2168 | } | |
2169 | bfd_seek (abfd, (file_ptr) i_ehdrp->e_shoff, SEEK_SET); | |
2170 | bfd_write ((PTR) x_shdrp, sizeof (*x_shdrp), i_ehdrp->e_shnum, abfd); | |
2171 | /* need to dump the string table too... */ | |
244ffee7 | 2172 | |
32090b8e KR |
2173 | return true; |
2174 | } | |
244ffee7 | 2175 | |
32090b8e KR |
2176 | static void |
2177 | assign_file_positions_for_relocs (abfd) | |
2178 | bfd *abfd; | |
2179 | { | |
2180 | file_ptr off = elf_tdata(abfd)->next_file_pos; | |
2181 | int i; | |
2182 | Elf_Internal_Shdr **shdrpp = elf_elfsections (abfd); | |
2183 | Elf_Internal_Shdr *shdrp; | |
2184 | for (i = 0; i < elf_elfheader(abfd)->e_shnum; i++) | |
2185 | { | |
2186 | shdrp = shdrpp[i]; | |
2187 | if (shdrp->sh_type != SHT_REL && shdrp->sh_type != SHT_RELA) | |
2188 | continue; | |
2189 | off = assign_file_position_for_section (shdrp, off); | |
2190 | } | |
2191 | elf_tdata(abfd)->next_file_pos = off; | |
2192 | } | |
244ffee7 | 2193 | |
32090b8e KR |
2194 | boolean |
2195 | DEFUN (NAME(bfd_elf,write_object_contents), (abfd), bfd * abfd) | |
2196 | { | |
2197 | Elf_Internal_Ehdr *i_ehdrp; | |
2198 | Elf_Internal_Shdr **i_shdrp; | |
2199 | int count; | |
244ffee7 | 2200 | |
32090b8e KR |
2201 | if (abfd->output_has_begun == false) |
2202 | { | |
2203 | malloc (0); | |
2204 | prep_headers (abfd); | |
2205 | malloc(0); | |
2206 | elf_compute_section_file_positions (abfd); | |
2207 | malloc(0); | |
2208 | abfd->output_has_begun = true; | |
2209 | } | |
244ffee7 | 2210 | |
32090b8e KR |
2211 | i_shdrp = elf_elfsections (abfd); |
2212 | i_ehdrp = elf_elfheader (abfd); | |
244ffee7 | 2213 | |
32090b8e KR |
2214 | bfd_map_over_sections (abfd, write_relocs, (PTR) 0); |
2215 | malloc(0); | |
2216 | assign_file_positions_for_relocs (abfd); | |
244ffee7 | 2217 | |
32090b8e KR |
2218 | /* After writing the headers, we need to write the sections too... */ |
2219 | for (count = 0; count < i_ehdrp->e_shnum; count++) | |
2220 | if (i_shdrp[count]->contents) | |
2221 | { | |
2222 | bfd_seek (abfd, i_shdrp[count]->sh_offset, SEEK_SET); | |
2223 | bfd_write (i_shdrp[count]->contents, i_shdrp[count]->sh_size, 1, abfd); | |
244ffee7 | 2224 | } |
32090b8e KR |
2225 | return write_shdrs_and_ehdr (abfd); |
2226 | } | |
244ffee7 | 2227 | |
32090b8e KR |
2228 | /* Given an index of a section, retrieve a pointer to it. Note |
2229 | that for our purposes, sections are indexed by {1, 2, ...} with | |
2230 | 0 being an illegal index. */ | |
244ffee7 | 2231 | |
32090b8e KR |
2232 | /* In the original, each ELF section went into exactly one BFD |
2233 | section. This doesn't really make sense, so we need a real mapping. | |
2234 | The mapping has to hide in the Elf_Internal_Shdr since asection | |
2235 | doesn't have anything like a tdata field... */ | |
244ffee7 | 2236 | |
32090b8e KR |
2237 | static struct sec * |
2238 | DEFUN (section_from_elf_index, (abfd, index), | |
2239 | bfd * abfd AND | |
2240 | int index) | |
2241 | { | |
2242 | /* @@ Is bfd_com_section really correct in all the places it could | |
2243 | be returned from this routine? */ | |
244ffee7 | 2244 | |
32090b8e KR |
2245 | if (index == SHN_ABS) |
2246 | return &bfd_com_section; /* not abs? */ | |
2247 | if (index == SHN_COMMON) | |
2248 | return &bfd_com_section; | |
244ffee7 | 2249 | |
32090b8e KR |
2250 | if (index > elf_elfheader (abfd)->e_shnum) |
2251 | return 0; | |
244ffee7 JK |
2252 | |
2253 | { | |
32090b8e | 2254 | Elf_Internal_Shdr *hdr = elf_elfsections (abfd)[index]; |
244ffee7 | 2255 | |
32090b8e | 2256 | switch (hdr->sh_type) |
244ffee7 | 2257 | { |
32090b8e KR |
2258 | /* ELF sections that map to BFD sections */ |
2259 | case SHT_PROGBITS: | |
2260 | case SHT_NOBITS: | |
2261 | if (!hdr->rawdata) | |
2262 | bfd_section_from_shdr (abfd, index); | |
2263 | return (struct sec *) hdr->rawdata; | |
244ffee7 | 2264 | |
32090b8e KR |
2265 | default: |
2266 | return (struct sec *) &bfd_abs_section; | |
244ffee7 | 2267 | } |
244ffee7 | 2268 | } |
32090b8e | 2269 | } |
244ffee7 | 2270 | |
32090b8e KR |
2271 | /* given a section, search the header to find them... */ |
2272 | static int | |
2273 | DEFUN (elf_section_from_bfd_section, (abfd, asect), | |
2274 | bfd * abfd AND | |
2275 | struct sec *asect) | |
2276 | { | |
2277 | Elf_Internal_Shdr **i_shdrp = elf_elfsections (abfd); | |
2278 | int index; | |
2279 | Elf_Internal_Shdr *hdr; | |
2280 | int maxindex = elf_elfheader (abfd)->e_shnum; | |
244ffee7 | 2281 | |
32090b8e KR |
2282 | if (asect == &bfd_abs_section) |
2283 | return SHN_ABS; | |
2284 | if (asect == &bfd_com_section) | |
2285 | return SHN_COMMON; | |
2286 | if (asect == &bfd_und_section) | |
2287 | return SHN_UNDEF; | |
244ffee7 | 2288 | |
32090b8e KR |
2289 | for (index = 0; index < maxindex; index++) |
2290 | { | |
2291 | hdr = i_shdrp[index]; | |
2292 | switch (hdr->sh_type) | |
2293 | { | |
2294 | /* ELF sections that map to BFD sections */ | |
2295 | case SHT_PROGBITS: | |
2296 | case SHT_NOBITS: | |
2297 | if (hdr->rawdata) | |
2298 | { | |
2299 | if (((struct sec *) (hdr->rawdata)) == asect) | |
2300 | return index; | |
2301 | } | |
2302 | break; | |
2303 | default: | |
2304 | break; | |
2305 | } | |
2306 | } | |
2307 | return -1; | |
2308 | } | |
244ffee7 | 2309 | |
32090b8e KR |
2310 | /* given a symbol, return the bfd index for that symbol. */ |
2311 | static int | |
2312 | DEFUN (elf_symbol_from_bfd_symbol, (abfd, asym_ptr_ptr), | |
2313 | bfd * abfd AND | |
2314 | struct symbol_cache_entry **asym_ptr_ptr) | |
2315 | { | |
2316 | struct symbol_cache_entry *asym_ptr = *asym_ptr_ptr; | |
2317 | CONST char *name = asym_ptr->name; | |
2318 | int idx; | |
2319 | int symcount = bfd_get_symcount (abfd); | |
2320 | asymbol **syms = bfd_get_outsymbols (abfd); | |
2321 | ||
2322 | /* FIXME -- there has to be a better way than linear search. */ | |
2323 | for (idx = 0; idx < symcount; idx++) | |
2324 | { | |
2325 | if (syms[idx] == asym_ptr | |
2326 | || (name == syms[idx]->name && name) | |
2327 | || ((asym_ptr->flags & BSF_SECTION_SYM) | |
2328 | && (syms[idx]->flags & BSF_SECTION_SYM) | |
2329 | && asym_ptr->section == syms[idx]->section)) | |
2330 | break; | |
2331 | } | |
2332 | ||
2333 | if (idx >= symcount) | |
2334 | { | |
2335 | /* badness... */ | |
2336 | fprintf (stderr, "bfd app err: can't find sym `%s' in symtab\n", | |
2337 | name); | |
2338 | abort (); | |
2339 | } | |
2340 | idx = elf_symtab_map (abfd)[idx]; | |
244ffee7 | 2341 | |
32090b8e | 2342 | #if DEBUG & 4 |
244ffee7 | 2343 | { |
32090b8e | 2344 | flagword flags = asym_ptr->flags; |
244ffee7 | 2345 | |
32090b8e KR |
2346 | fprintf (stderr, |
2347 | "elfsym<-bfdsym %.8lx `%s' sec=%s symnum=%d {", | |
2348 | (long) asym_ptr, asym_ptr->name, asym_ptr->section->name, idx); | |
244ffee7 | 2349 | |
32090b8e KR |
2350 | if (flags == BSF_NO_FLAGS) |
2351 | fprintf (stderr, " none"); | |
244ffee7 | 2352 | |
32090b8e KR |
2353 | if (flags & BSF_LOCAL) |
2354 | fprintf (stderr, " local"); | |
244ffee7 | 2355 | |
32090b8e KR |
2356 | if (flags & BSF_GLOBAL) |
2357 | fprintf (stderr, " global"); | |
244ffee7 | 2358 | |
32090b8e KR |
2359 | if (flags & BSF_EXPORT) |
2360 | fprintf (stderr, " export"); | |
244ffee7 | 2361 | |
32090b8e KR |
2362 | if (flags & BSF_DEBUGGING) |
2363 | fprintf (stderr, " debugging"); | |
244ffee7 | 2364 | |
32090b8e KR |
2365 | if (flags & BSF_KEEP) |
2366 | fprintf (stderr, " keep"); | |
244ffee7 | 2367 | |
32090b8e KR |
2368 | if (flags & BSF_KEEP_G) |
2369 | fprintf (stderr, " keep_g"); | |
244ffee7 | 2370 | |
32090b8e KR |
2371 | if (flags & BSF_WEAK) |
2372 | fprintf (stderr, " weak"); | |
244ffee7 | 2373 | |
32090b8e KR |
2374 | if (flags & BSF_SECTION_SYM) |
2375 | fprintf (stderr, " section_sym"); | |
244ffee7 | 2376 | |
32090b8e KR |
2377 | if (flags & BSF_OLD_COMMON) |
2378 | fprintf (stderr, " old_common"); | |
244ffee7 | 2379 | |
32090b8e KR |
2380 | if (flags & BSF_NOT_AT_END) |
2381 | fprintf (stderr, " not_at_end"); | |
244ffee7 | 2382 | |
32090b8e KR |
2383 | if (flags & BSF_CONSTRUCTOR) |
2384 | fprintf (stderr, " constructor"); | |
244ffee7 | 2385 | |
32090b8e KR |
2386 | if (flags & BSF_WARNING) |
2387 | fprintf (stderr, " warning"); | |
244ffee7 | 2388 | |
32090b8e KR |
2389 | if (flags & BSF_INDIRECT) |
2390 | fprintf (stderr, " indirect"); | |
244ffee7 | 2391 | |
32090b8e KR |
2392 | if (flags & BSF_FILE) |
2393 | fprintf (stderr, " file"); | |
244ffee7 | 2394 | |
32090b8e KR |
2395 | if (flags & BSF_FUNCTION) |
2396 | fprintf (stderr, " function"); | |
2397 | ||
2398 | fputs (" }\n", stderr); | |
2399 | fflush (stderr); | |
2400 | } | |
2401 | #endif | |
2402 | ||
2403 | return idx; | |
2404 | } | |
2405 | ||
2406 | static boolean | |
2407 | DEFUN (elf_slurp_symbol_table, (abfd, symptrs), | |
2408 | bfd * abfd AND | |
2409 | asymbol ** symptrs) /* Buffer for generated bfd symbols */ | |
2410 | { | |
2411 | Elf_Internal_Shdr *hdr = &elf_tdata(abfd)->symtab_hdr; | |
2412 | int symcount; /* Number of external ELF symbols */ | |
2413 | int i; | |
2414 | elf_symbol_type *sym; /* Pointer to current bfd symbol */ | |
2415 | elf_symbol_type *symbase; /* Buffer for generated bfd symbols */ | |
2416 | Elf_Internal_Sym i_sym; | |
2417 | Elf_External_Sym *x_symp; | |
2418 | ||
2419 | /* this is only valid because there is only one symtab... */ | |
2420 | /* FIXME: This is incorrect, there may also be a dynamic symbol | |
2421 | table which is a subset of the full symbol table. We either need | |
2422 | to be prepared to read both (and merge them) or ensure that we | |
2423 | only read the full symbol table. Currently we only get called to | |
2424 | read the full symbol table. -fnf */ | |
2425 | if (bfd_get_outsymbols (abfd) != NULL) | |
244ffee7 | 2426 | { |
32090b8e | 2427 | return true; |
244ffee7 | 2428 | } |
244ffee7 | 2429 | |
32090b8e KR |
2430 | /* Read each raw ELF symbol, converting from external ELF form to |
2431 | internal ELF form, and then using the information to create a | |
2432 | canonical bfd symbol table entry. | |
244ffee7 | 2433 | |
32090b8e KR |
2434 | Note that we allocate the initial bfd canonical symbol buffer |
2435 | based on a one-to-one mapping of the ELF symbols to canonical | |
2436 | symbols. We actually use all the ELF symbols, so there will be no | |
2437 | space left over at the end. When we have all the symbols, we | |
2438 | build the caller's pointer vector. */ | |
244ffee7 | 2439 | |
32090b8e KR |
2440 | if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) == -1) |
2441 | { | |
2442 | bfd_error = system_call_error; | |
2443 | return false; | |
2444 | } | |
244ffee7 | 2445 | |
32090b8e KR |
2446 | symcount = hdr->sh_size / sizeof (Elf_External_Sym); |
2447 | symbase = (elf_symbol_type *) bfd_zalloc (abfd, symcount * sizeof (elf_symbol_type)); | |
2448 | sym = symbase; | |
244ffee7 | 2449 | |
32090b8e KR |
2450 | /* Temporarily allocate room for the raw ELF symbols. */ |
2451 | x_symp = (Elf_External_Sym *) bfd_xmalloc (symcount * sizeof (Elf_External_Sym)); | |
244ffee7 | 2452 | |
32090b8e KR |
2453 | if (bfd_read ((PTR) x_symp, sizeof (Elf_External_Sym), symcount, abfd) |
2454 | != symcount * sizeof (Elf_External_Sym)) | |
244ffee7 | 2455 | { |
32090b8e KR |
2456 | free ((PTR) x_symp); |
2457 | bfd_error = system_call_error; | |
2458 | return false; | |
244ffee7 | 2459 | } |
32090b8e KR |
2460 | /* Skip first symbol, which is a null dummy. */ |
2461 | for (i = 1; i < symcount; i++) | |
244ffee7 | 2462 | { |
32090b8e KR |
2463 | elf_swap_symbol_in (abfd, x_symp + i, &i_sym); |
2464 | memcpy (&sym->internal_elf_sym, &i_sym, sizeof (Elf_Internal_Sym)); | |
2465 | memcpy (&sym->native_elf_sym, x_symp + i, sizeof (Elf_External_Sym)); | |
2466 | sym->symbol.the_bfd = abfd; | |
244ffee7 | 2467 | |
32090b8e KR |
2468 | sym->symbol.name = elf_string_from_elf_section (abfd, hdr->sh_link, |
2469 | i_sym.st_name); | |
244ffee7 | 2470 | |
32090b8e | 2471 | sym->symbol.value = i_sym.st_value; |
244ffee7 | 2472 | |
32090b8e KR |
2473 | if (i_sym.st_shndx > 0 && i_sym.st_shndx < SHN_LORESERV) |
2474 | { | |
2475 | sym->symbol.section = section_from_elf_index (abfd, i_sym.st_shndx); | |
2476 | } | |
2477 | else if (i_sym.st_shndx == SHN_ABS) | |
2478 | { | |
2479 | sym->symbol.section = &bfd_abs_section; | |
2480 | } | |
2481 | else if (i_sym.st_shndx == SHN_COMMON) | |
2482 | { | |
2483 | sym->symbol.section = &bfd_com_section; | |
2484 | /* Elf puts the alignment into the `value' field, and the size | |
2485 | into the `size' field. BFD wants to see the size in the | |
2486 | value field, and doesn't care (at the moment) about the | |
2487 | alignment. */ | |
2488 | sym->symbol.value = i_sym.st_size; | |
2489 | } | |
2490 | else if (i_sym.st_shndx == SHN_UNDEF) | |
2491 | { | |
2492 | sym->symbol.section = &bfd_und_section; | |
2493 | } | |
2494 | else | |
2495 | sym->symbol.section = &bfd_abs_section; | |
244ffee7 | 2496 | |
32090b8e | 2497 | sym->symbol.value -= sym->symbol.section->vma; |
244ffee7 | 2498 | |
32090b8e | 2499 | switch (ELF_ST_BIND (i_sym.st_info)) |
244ffee7 | 2500 | { |
32090b8e KR |
2501 | case STB_LOCAL: |
2502 | sym->symbol.flags |= BSF_LOCAL; | |
2503 | break; | |
2504 | case STB_GLOBAL: | |
2505 | sym->symbol.flags |= (BSF_GLOBAL | BSF_EXPORT); | |
2506 | break; | |
2507 | case STB_WEAK: | |
2508 | sym->symbol.flags |= BSF_WEAK; | |
2509 | break; | |
2510 | } | |
244ffee7 | 2511 | |
32090b8e KR |
2512 | switch (ELF_ST_TYPE (i_sym.st_info)) |
2513 | { | |
2514 | case STT_SECTION: | |
2515 | sym->symbol.flags |= BSF_SECTION_SYM | BSF_DEBUGGING; | |
2516 | break; | |
2517 | case STT_FILE: | |
2518 | sym->symbol.flags |= BSF_FILE | BSF_DEBUGGING; | |
2519 | break; | |
2520 | case STT_FUNC: | |
2521 | sym->symbol.flags |= BSF_FUNCTION; | |
2522 | break; | |
244ffee7 | 2523 | } |
32090b8e KR |
2524 | /* Is this a definition of $global$? If so, keep it because it will be |
2525 | needd if any relocations are performed. */ | |
2526 | if (!strcmp (sym->symbol.name, "$global$") | |
2527 | && sym->symbol.section != &bfd_und_section) | |
2528 | { | |
2529 | /* @@ Why is this referring to backend data and not a field of | |
2530 | abfd? FIXME */ | |
2531 | struct elf_backend_data *be_data = (struct elf_backend_data *) abfd->xvec->backend_data; | |
244ffee7 | 2532 | |
32090b8e KR |
2533 | be_data->global_sym = (PTR) sym; |
2534 | } | |
2535 | sym++; | |
244ffee7 JK |
2536 | } |
2537 | ||
32090b8e | 2538 | /* We rely on the zalloc to clear out the final symbol entry. */ |
244ffee7 | 2539 | |
32090b8e KR |
2540 | /* obj_raw_syms macro uses a cast... */ |
2541 | elf_tdata (abfd)->raw_syms = (PTR) x_symp; | |
244ffee7 | 2542 | |
32090b8e KR |
2543 | bfd_get_symcount (abfd) = symcount = sym - symbase; |
2544 | ||
2545 | /* Fill in the user's symbol pointer vector if needed. */ | |
2546 | if (symptrs) | |
244ffee7 | 2547 | { |
32090b8e KR |
2548 | sym = symbase; |
2549 | while (symcount-- > 0) | |
244ffee7 | 2550 | { |
32090b8e KR |
2551 | *symptrs++ = &sym->symbol; |
2552 | sym++; | |
244ffee7 | 2553 | } |
32090b8e | 2554 | *symptrs = 0; /* Final null pointer */ |
244ffee7 JK |
2555 | } |
2556 | ||
2557 | return true; | |
2558 | } | |
2559 | ||
32090b8e | 2560 | /* Return the number of bytes required to hold the symtab vector. |
244ffee7 | 2561 | |
32090b8e KR |
2562 | Note that we base it on the count plus 1, since we will null terminate |
2563 | the vector allocated based on this size. However, the ELF symbol table | |
2564 | always has a dummy entry as symbol #0, so it ends up even. */ | |
244ffee7 | 2565 | |
32090b8e KR |
2566 | unsigned int |
2567 | DEFUN (elf_get_symtab_upper_bound, (abfd), bfd * abfd) | |
244ffee7 | 2568 | { |
32090b8e KR |
2569 | unsigned int symcount; |
2570 | unsigned int symtab_size = 0; | |
244ffee7 | 2571 | |
32090b8e KR |
2572 | Elf_Internal_Shdr *hdr = &elf_tdata(abfd)->symtab_hdr; |
2573 | symcount = hdr->sh_size / sizeof (Elf_External_Sym); | |
2574 | symtab_size = (symcount - 1 + 1) * (sizeof (asymbol)); | |
244ffee7 | 2575 | |
32090b8e KR |
2576 | return symtab_size; |
2577 | } | |
244ffee7 | 2578 | |
32090b8e KR |
2579 | /* |
2580 | This function return the number of bytes required to store the | |
2581 | relocation information associated with section <<sect>> | |
2582 | attached to bfd <<abfd>> | |
244ffee7 | 2583 | |
32090b8e KR |
2584 | */ |
2585 | unsigned int | |
2586 | elf_get_reloc_upper_bound (abfd, asect) | |
2587 | bfd *abfd; | |
2588 | sec_ptr asect; | |
2589 | { | |
2590 | if (asect->flags & SEC_RELOC) | |
2591 | { | |
2592 | /* either rel or rela */ | |
2593 | return elf_section_data(asect)->rel_hdr.sh_size; | |
2594 | } | |
2595 | else | |
2596 | return 0; | |
244ffee7 JK |
2597 | } |
2598 | ||
32090b8e KR |
2599 | static boolean |
2600 | DEFUN (elf_slurp_reloca_table, (abfd, asect, symbols), | |
244ffee7 | 2601 | bfd * abfd AND |
32090b8e KR |
2602 | sec_ptr asect AND |
2603 | asymbol ** symbols) | |
244ffee7 | 2604 | { |
32090b8e KR |
2605 | Elf_External_Rela *native_relocs; |
2606 | arelent *reloc_cache; | |
2607 | arelent *cache_ptr; | |
244ffee7 | 2608 | |
32090b8e | 2609 | unsigned int idx; |
244ffee7 | 2610 | |
32090b8e KR |
2611 | if (asect->relocation) |
2612 | return true; | |
2613 | if (asect->reloc_count == 0) | |
2614 | return true; | |
2615 | if (asect->flags & SEC_CONSTRUCTOR) | |
2616 | return true; | |
244ffee7 | 2617 | |
32090b8e KR |
2618 | bfd_seek (abfd, asect->rel_filepos, SEEK_SET); |
2619 | native_relocs = (Elf_External_Rela *) | |
2620 | bfd_alloc (abfd, asect->reloc_count * sizeof (Elf_External_Rela)); | |
2621 | bfd_read ((PTR) native_relocs, | |
2622 | sizeof (Elf_External_Rela), asect->reloc_count, abfd); | |
244ffee7 | 2623 | |
32090b8e KR |
2624 | reloc_cache = (arelent *) |
2625 | bfd_alloc (abfd, (size_t) (asect->reloc_count * sizeof (arelent))); | |
2626 | ||
2627 | if (!reloc_cache) | |
6a3eb9b6 | 2628 | { |
32090b8e KR |
2629 | bfd_error = no_memory; |
2630 | return false; | |
6a3eb9b6 | 2631 | } |
244ffee7 | 2632 | |
32090b8e KR |
2633 | for (idx = 0; idx < asect->reloc_count; idx++) |
2634 | { | |
2635 | #ifdef RELOC_PROCESSING | |
2636 | Elf_Internal_Rela dst; | |
2637 | Elf_External_Rela *src; | |
244ffee7 | 2638 | |
32090b8e KR |
2639 | cache_ptr = reloc_cache + idx; |
2640 | src = native_relocs + idx; | |
2641 | elf_swap_reloca_in (abfd, src, &dst); | |
244ffee7 | 2642 | |
32090b8e KR |
2643 | RELOC_PROCESSING (cache_ptr, &dst, symbols, abfd, asect); |
2644 | #else | |
2645 | Elf_Internal_Rela dst; | |
2646 | Elf_External_Rela *src; | |
244ffee7 | 2647 | |
32090b8e KR |
2648 | cache_ptr = reloc_cache + idx; |
2649 | src = native_relocs + idx; | |
244ffee7 | 2650 | |
32090b8e | 2651 | elf_swap_reloca_in (abfd, src, &dst); |
244ffee7 | 2652 | |
32090b8e KR |
2653 | if (asect->flags & SEC_RELOC) |
2654 | { | |
2655 | /* relocatable, so the offset is off of the section */ | |
2656 | cache_ptr->address = dst.r_offset + asect->vma; | |
2657 | } | |
2658 | else | |
2659 | { | |
2660 | /* non-relocatable, so the offset a virtual address */ | |
2661 | cache_ptr->address = dst.r_offset; | |
2662 | } | |
2663 | /* ELF_R_SYM(dst.r_info) is the symbol table offset; subtract 1 | |
2664 | because the first entry is NULL. */ | |
2665 | cache_ptr->sym_ptr_ptr = symbols + ELF_R_SYM (dst.r_info) - 1; | |
2666 | { | |
2667 | /* Is it an ELF section symbol? If so, translate it into a | |
2668 | BFD section symbol. */ | |
2669 | asymbol *s = *(cache_ptr->sym_ptr_ptr); | |
2670 | if (s->flags & BSF_SECTION_SYM) | |
2671 | cache_ptr->sym_ptr_ptr = s->section->symbol_ptr_ptr; | |
2672 | } | |
2673 | cache_ptr->addend = dst.r_addend; | |
244ffee7 | 2674 | |
32090b8e KR |
2675 | /* Fill in the cache_ptr->howto field from dst.r_type */ |
2676 | { | |
2677 | struct elf_backend_data *ebd = get_elf_backend_data (abfd); | |
2678 | (*ebd->elf_info_to_howto) (abfd, cache_ptr, &dst); | |
2679 | } | |
2680 | #endif | |
2681 | } | |
244ffee7 | 2682 | |
32090b8e KR |
2683 | asect->relocation = reloc_cache; |
2684 | return true; | |
2685 | } | |
238ac6ec | 2686 | |
32090b8e KR |
2687 | #ifdef DEBUG |
2688 | static void | |
2689 | elf_debug_section (str, num, hdr) | |
2690 | char *str; | |
2691 | int num; | |
2692 | Elf_Internal_Shdr *hdr; | |
2693 | { | |
2694 | fprintf (stderr, "\nSection#%d '%s' 0x%.8lx\n", num, str, (long) hdr); | |
2695 | fprintf (stderr, | |
2696 | "sh_name = %ld\tsh_type = %ld\tsh_flags = %ld\n", | |
2697 | (long) hdr->sh_name, | |
2698 | (long) hdr->sh_type, | |
2699 | (long) hdr->sh_flags); | |
2700 | fprintf (stderr, | |
2701 | "sh_addr = %ld\tsh_offset = %ld\tsh_size = %ld\n", | |
2702 | (long) hdr->sh_addr, | |
2703 | (long) hdr->sh_offset, | |
2704 | (long) hdr->sh_size); | |
2705 | fprintf (stderr, | |
2706 | "sh_link = %ld\tsh_info = %ld\tsh_addralign = %ld\n", | |
2707 | (long) hdr->sh_link, | |
2708 | (long) hdr->sh_info, | |
2709 | (long) hdr->sh_addralign); | |
2710 | fprintf (stderr, "sh_entsize = %ld\n", | |
2711 | (long) hdr->sh_entsize); | |
2712 | fprintf (stderr, "rawdata = 0x%.8lx\n", (long) hdr->rawdata); | |
2713 | fprintf (stderr, "contents = 0x%.8lx\n", (long) hdr->contents); | |
2714 | fprintf (stderr, "size = %ld\n", (long) hdr->size); | |
2715 | fflush (stderr); | |
2716 | } | |
244ffee7 | 2717 | |
32090b8e KR |
2718 | static void |
2719 | elf_debug_file (ehdrp) | |
2720 | Elf_Internal_Ehdr *ehdrp; | |
2721 | { | |
2722 | fprintf (stderr, "e_entry = 0x%.8lx\n", (long) ehdrp->e_entry); | |
2723 | fprintf (stderr, "e_phoff = %ld\n", (long) ehdrp->e_phoff); | |
2724 | fprintf (stderr, "e_phnum = %ld\n", (long) ehdrp->e_phnum); | |
2725 | fprintf (stderr, "e_phentsize = %ld\n", (long) ehdrp->e_phentsize); | |
2726 | fprintf (stderr, "e_shoff = %ld\n", (long) ehdrp->e_shoff); | |
2727 | fprintf (stderr, "e_shnum = %ld\n", (long) ehdrp->e_shnum); | |
2728 | fprintf (stderr, "e_shentsize = %ld\n", (long) ehdrp->e_shentsize); | |
244ffee7 | 2729 | } |
32090b8e | 2730 | #endif |
244ffee7 JK |
2731 | |
2732 | static boolean | |
32090b8e | 2733 | DEFUN (elf_slurp_reloc_table, (abfd, asect, symbols), |
244ffee7 | 2734 | bfd * abfd AND |
32090b8e KR |
2735 | sec_ptr asect AND |
2736 | asymbol ** symbols) | |
244ffee7 | 2737 | { |
32090b8e KR |
2738 | Elf_External_Rel *native_relocs; |
2739 | arelent *reloc_cache; | |
2740 | arelent *cache_ptr; | |
2741 | Elf_Internal_Shdr *data_hdr; | |
2742 | ElfNAME (Off) data_off; | |
2743 | ElfNAME (Word) data_max; | |
2744 | char buf[4]; /* FIXME -- might be elf64 */ | |
244ffee7 | 2745 | |
32090b8e | 2746 | unsigned int idx; |
244ffee7 | 2747 | |
32090b8e KR |
2748 | if (asect->relocation) |
2749 | return true; | |
2750 | if (asect->reloc_count == 0) | |
2751 | return true; | |
2752 | if (asect->flags & SEC_CONSTRUCTOR) | |
2753 | return true; | |
244ffee7 | 2754 | |
32090b8e KR |
2755 | bfd_seek (abfd, asect->rel_filepos, SEEK_SET); |
2756 | native_relocs = (Elf_External_Rel *) | |
2757 | bfd_alloc (abfd, asect->reloc_count * sizeof (Elf_External_Rel)); | |
2758 | bfd_read ((PTR) native_relocs, | |
2759 | sizeof (Elf_External_Rel), asect->reloc_count, abfd); | |
244ffee7 | 2760 | |
32090b8e KR |
2761 | reloc_cache = (arelent *) |
2762 | bfd_alloc (abfd, (size_t) (asect->reloc_count * sizeof (arelent))); | |
2763 | ||
2764 | if (!reloc_cache) | |
244ffee7 | 2765 | { |
32090b8e | 2766 | bfd_error = no_memory; |
244ffee7 JK |
2767 | return false; |
2768 | } | |
2769 | ||
32090b8e KR |
2770 | /* Get the offset of the start of the segment we are relocating to read in |
2771 | the implicit addend. */ | |
2772 | data_hdr = &elf_section_data(asect)->this_hdr; | |
2773 | data_off = data_hdr->sh_offset; | |
2774 | data_max = data_hdr->sh_size - sizeof (buf) + 1; | |
244ffee7 | 2775 | |
32090b8e KR |
2776 | #if DEBUG & 2 |
2777 | elf_debug_section ("data section", -1, data_hdr); | |
2778 | #endif | |
244ffee7 | 2779 | |
32090b8e | 2780 | for (idx = 0; idx < asect->reloc_count; idx++) |
244ffee7 | 2781 | { |
32090b8e KR |
2782 | #ifdef RELOC_PROCESSING |
2783 | Elf_Internal_Rel dst; | |
2784 | Elf_External_Rel *src; | |
244ffee7 | 2785 | |
32090b8e KR |
2786 | cache_ptr = reloc_cache + idx; |
2787 | src = native_relocs + idx; | |
2788 | elf_swap_reloc_in (abfd, src, &dst); | |
244ffee7 | 2789 | |
32090b8e KR |
2790 | RELOC_PROCESSING (cache_ptr, &dst, symbols, abfd, asect); |
2791 | #else | |
2792 | Elf_Internal_Rel dst; | |
2793 | Elf_External_Rel *src; | |
6a3eb9b6 | 2794 | |
32090b8e KR |
2795 | cache_ptr = reloc_cache + idx; |
2796 | src = native_relocs + idx; | |
2797 | ||
2798 | elf_swap_reloc_in (abfd, src, &dst); | |
2799 | ||
2800 | if (asect->flags & SEC_RELOC) | |
244ffee7 | 2801 | { |
32090b8e KR |
2802 | /* relocatable, so the offset is off of the section */ |
2803 | cache_ptr->address = dst.r_offset + asect->vma; | |
244ffee7 | 2804 | } |
32090b8e | 2805 | else |
244ffee7 | 2806 | { |
32090b8e KR |
2807 | /* non-relocatable, so the offset a virtual address */ |
2808 | cache_ptr->address = dst.r_offset; | |
244ffee7 | 2809 | } |
32090b8e KR |
2810 | /* ELF_R_SYM(dst.r_info) is the symbol table offset... |
2811 | -1 is to skip the dummy symbol table entry */ | |
2812 | cache_ptr->sym_ptr_ptr = symbols + ELF_R_SYM (dst.r_info) - 1; | |
2813 | BFD_ASSERT (dst.r_offset <= data_max); | |
2814 | if (bfd_seek (abfd, data_off + dst.r_offset, SEEK_SET) != 0 | |
2815 | || bfd_read ((PTR) buf, sizeof (buf), 1, abfd) != sizeof (buf)) | |
244ffee7 | 2816 | { |
32090b8e KR |
2817 | bfd_error = system_call_error; |
2818 | return false; | |
244ffee7 | 2819 | } |
244ffee7 | 2820 | |
32090b8e | 2821 | cache_ptr->addend = (*abfd->xvec->bfd_getx_signed_32) ((bfd_byte *) buf); |
244ffee7 | 2822 | |
32090b8e KR |
2823 | /* Fill in the cache_ptr->howto field from dst.r_type */ |
2824 | { | |
2825 | struct elf_backend_data *ebd = get_elf_backend_data (abfd); | |
2826 | (*ebd->elf_info_to_howto_rel) (abfd, cache_ptr, &dst); | |
2827 | } | |
2828 | #endif | |
2829 | } | |
244ffee7 | 2830 | |
32090b8e KR |
2831 | asect->relocation = reloc_cache; |
2832 | return true; | |
2833 | } | |
244ffee7 | 2834 | |
32090b8e KR |
2835 | unsigned int |
2836 | elf_canonicalize_reloc (abfd, section, relptr, symbols) | |
2837 | bfd *abfd; | |
2838 | sec_ptr section; | |
2839 | arelent **relptr; | |
2840 | asymbol **symbols; | |
2841 | { | |
2842 | arelent *tblptr = section->relocation; | |
2843 | unsigned int count = 0; | |
2844 | int use_rela_p = get_elf_backend_data (abfd)->use_rela_p; | |
2845 | ||
2846 | /* snarfed from coffcode.h */ | |
2847 | if (use_rela_p) | |
2848 | elf_slurp_reloca_table (abfd, section, symbols); | |
2849 | else | |
2850 | elf_slurp_reloc_table (abfd, section, symbols); | |
2851 | ||
2852 | tblptr = section->relocation; | |
2853 | if (!tblptr) | |
2854 | return 0; | |
2855 | ||
2856 | for (; count++ < section->reloc_count;) | |
2857 | *relptr++ = tblptr++; | |
2858 | ||
2859 | *relptr = 0; | |
2860 | return section->reloc_count; | |
2861 | } | |
2862 | ||
2863 | unsigned int | |
2864 | DEFUN (elf_get_symtab, (abfd, alocation), | |
2865 | bfd * abfd AND | |
2866 | asymbol ** alocation) | |
2867 | { | |
2868 | ||
2869 | if (!elf_slurp_symbol_table (abfd, alocation)) | |
2870 | return 0; | |
2871 | else | |
2872 | return bfd_get_symcount (abfd); | |
2873 | } | |
2874 | ||
2875 | asymbol * | |
2876 | DEFUN (elf_make_empty_symbol, (abfd), | |
2877 | bfd * abfd) | |
2878 | { | |
2879 | elf_symbol_type *newsym; | |
2880 | ||
2881 | newsym = (elf_symbol_type *) bfd_zalloc (abfd, sizeof (elf_symbol_type)); | |
2882 | if (!newsym) | |
2883 | { | |
2884 | bfd_error = no_memory; | |
2885 | return NULL; | |
2886 | } | |
2887 | else | |
2888 | { | |
2889 | newsym->symbol.the_bfd = abfd; | |
2890 | return &newsym->symbol; | |
244ffee7 | 2891 | } |
32090b8e | 2892 | } |
244ffee7 | 2893 | |
32090b8e KR |
2894 | void |
2895 | DEFUN (elf_get_symbol_info, (ignore_abfd, symbol, ret), | |
2896 | bfd * ignore_abfd AND | |
2897 | asymbol * symbol AND | |
2898 | symbol_info * ret) | |
2899 | { | |
2900 | bfd_symbol_info (symbol, ret); | |
2901 | } | |
244ffee7 | 2902 | |
32090b8e KR |
2903 | void |
2904 | DEFUN (elf_print_symbol, (ignore_abfd, filep, symbol, how), | |
2905 | bfd * ignore_abfd AND | |
2906 | PTR filep AND | |
2907 | asymbol * symbol AND | |
2908 | bfd_print_symbol_type how) | |
2909 | { | |
2910 | FILE *file = (FILE *) filep; | |
2911 | switch (how) | |
2912 | { | |
2913 | case bfd_print_symbol_name: | |
2914 | fprintf (file, "%s", symbol->name); | |
2915 | break; | |
2916 | case bfd_print_symbol_more: | |
2917 | fprintf (file, "elf "); | |
2918 | fprintf_vma (file, symbol->value); | |
2919 | fprintf (file, " %lx", (long) symbol->flags); | |
2920 | break; | |
2921 | case bfd_print_symbol_all: | |
2922 | { | |
2923 | CONST char *section_name; | |
2924 | section_name = symbol->section ? symbol->section->name : "(*none*)"; | |
2925 | bfd_print_symbol_vandf ((PTR) file, symbol); | |
2926 | fprintf (file, " %s\t%s", | |
2927 | section_name, | |
2928 | symbol->name); | |
2929 | } | |
2930 | break; | |
2931 | } | |
244ffee7 | 2932 | |
32090b8e | 2933 | } |
244ffee7 | 2934 | |
32090b8e KR |
2935 | alent * |
2936 | DEFUN (elf_get_lineno, (ignore_abfd, symbol), | |
2937 | bfd * ignore_abfd AND | |
2938 | asymbol * symbol) | |
2939 | { | |
2940 | fprintf (stderr, "elf_get_lineno unimplemented\n"); | |
2941 | fflush (stderr); | |
2942 | BFD_FAIL (); | |
2943 | return NULL; | |
2944 | } | |
2945 | ||
2946 | boolean | |
2947 | DEFUN (elf_set_arch_mach, (abfd, arch, machine), | |
2948 | bfd * abfd AND | |
2949 | enum bfd_architecture arch AND | |
2950 | unsigned long machine) | |
2951 | { | |
2952 | /* Allow any architecture to be supported by the elf backend */ | |
2953 | switch (arch) | |
244ffee7 | 2954 | { |
32090b8e KR |
2955 | case bfd_arch_unknown: /* EM_NONE */ |
2956 | case bfd_arch_sparc: /* EM_SPARC */ | |
2957 | case bfd_arch_i386: /* EM_386 */ | |
2958 | case bfd_arch_m68k: /* EM_68K */ | |
2959 | case bfd_arch_m88k: /* EM_88K */ | |
2960 | case bfd_arch_i860: /* EM_860 */ | |
2961 | case bfd_arch_mips: /* EM_MIPS (MIPS R3000) */ | |
2962 | case bfd_arch_hppa: /* EM_HPPA (HP PA_RISC) */ | |
2963 | return bfd_default_set_arch_mach (abfd, arch, machine); | |
2964 | default: | |
2965 | return false; | |
244ffee7 | 2966 | } |
32090b8e | 2967 | } |
244ffee7 | 2968 | |
32090b8e KR |
2969 | boolean |
2970 | DEFUN (elf_find_nearest_line, (abfd, | |
2971 | section, | |
2972 | symbols, | |
2973 | offset, | |
2974 | filename_ptr, | |
2975 | functionname_ptr, | |
2976 | line_ptr), | |
2977 | bfd * abfd AND | |
2978 | asection * section AND | |
2979 | asymbol ** symbols AND | |
2980 | bfd_vma offset AND | |
2981 | CONST char **filename_ptr AND | |
2982 | CONST char **functionname_ptr AND | |
2983 | unsigned int *line_ptr) | |
2984 | { | |
2985 | return false; | |
244ffee7 JK |
2986 | } |
2987 | ||
32090b8e KR |
2988 | int |
2989 | DEFUN (elf_sizeof_headers, (abfd, reloc), | |
2990 | bfd * abfd AND | |
2991 | boolean reloc) | |
2992 | { | |
2993 | fprintf (stderr, "elf_sizeof_headers unimplemented\n"); | |
2994 | fflush (stderr); | |
2995 | BFD_FAIL (); | |
2996 | return 0; | |
2997 | } | |
244ffee7 | 2998 | |
32090b8e KR |
2999 | boolean |
3000 | DEFUN (elf_set_section_contents, (abfd, section, location, offset, count), | |
3001 | bfd * abfd AND | |
3002 | sec_ptr section AND | |
3003 | PTR location AND | |
3004 | file_ptr offset AND | |
3005 | bfd_size_type count) | |
244ffee7 | 3006 | { |
244ffee7 JK |
3007 | Elf_Internal_Shdr *hdr; |
3008 | ||
32090b8e | 3009 | if (abfd->output_has_begun == false) /* set by bfd.c handler? */ |
244ffee7 | 3010 | { |
32090b8e KR |
3011 | /* do setup calculations (FIXME) */ |
3012 | prep_headers (abfd); | |
3013 | elf_compute_section_file_positions (abfd); | |
3014 | abfd->output_has_begun = true; | |
244ffee7 | 3015 | } |
244ffee7 | 3016 | |
32090b8e | 3017 | hdr = &elf_section_data(section)->this_hdr; |
244ffee7 | 3018 | |
32090b8e KR |
3019 | if (bfd_seek (abfd, hdr->sh_offset + offset, SEEK_SET) == -1) |
3020 | return false; | |
3021 | if (bfd_write (location, 1, count, abfd) != count) | |
3022 | return false; | |
3023 | ||
3024 | return true; | |
3025 | } | |
3026 | ||
3027 | void | |
3028 | DEFUN (elf_no_info_to_howto, (abfd, cache_ptr, dst), | |
3029 | bfd * abfd AND | |
3030 | arelent * cache_ptr AND | |
3031 | Elf_Internal_Rela * dst) | |
244ffee7 | 3032 | { |
32090b8e KR |
3033 | fprintf (stderr, "elf RELA relocation support for target machine unimplemented\n"); |
3034 | fflush (stderr); | |
3035 | BFD_FAIL (); | |
244ffee7 JK |
3036 | } |
3037 | ||
32090b8e KR |
3038 | void |
3039 | DEFUN (elf_no_info_to_howto_rel, (abfd, cache_ptr, dst), | |
244ffee7 | 3040 | bfd * abfd AND |
32090b8e KR |
3041 | arelent * cache_ptr AND |
3042 | Elf_Internal_Rel * dst) | |
244ffee7 | 3043 | { |
32090b8e KR |
3044 | fprintf (stderr, "elf REL relocation support for target machine unimplemented\n"); |
3045 | fflush (stderr); | |
3046 | BFD_FAIL (); | |
3047 | } | |
244ffee7 | 3048 | |
32090b8e KR |
3049 | \f |
3050 | /* Core file support */ | |
244ffee7 | 3051 | |
32090b8e KR |
3052 | #ifdef HAVE_PROCFS /* Some core file support requires host /proc files */ |
3053 | #include <sys/procfs.h> | |
3054 | #else | |
3055 | #define bfd_prstatus(abfd, descdata, descsz, filepos) /* Define away */ | |
3056 | #define bfd_fpregset(abfd, descdata, descsz, filepos) /* Define away */ | |
3057 | #define bfd_prpsinfo(abfd, descdata, descsz, filepos) /* Define away */ | |
3058 | #endif | |
244ffee7 | 3059 | |
32090b8e | 3060 | #ifdef HAVE_PROCFS |
244ffee7 | 3061 | |
32090b8e KR |
3062 | static void |
3063 | DEFUN (bfd_prstatus, (abfd, descdata, descsz, filepos), | |
3064 | bfd * abfd AND | |
3065 | char *descdata AND | |
3066 | int descsz AND | |
3067 | long filepos) | |
3068 | { | |
3069 | asection *newsect; | |
3070 | prstatus_t *status = (prstatus_t *) 0; | |
244ffee7 | 3071 | |
32090b8e | 3072 | if (descsz == sizeof (prstatus_t)) |
244ffee7 | 3073 | { |
32090b8e KR |
3074 | newsect = bfd_make_section (abfd, ".reg"); |
3075 | newsect->_raw_size = sizeof (status->pr_reg); | |
3076 | newsect->filepos = filepos + (long) &status->pr_reg; | |
3077 | newsect->flags = SEC_ALLOC | SEC_HAS_CONTENTS; | |
3078 | newsect->alignment_power = 2; | |
3079 | if ((core_prstatus (abfd) = bfd_alloc (abfd, descsz)) != NULL) | |
3080 | { | |
3081 | memcpy (core_prstatus (abfd), descdata, descsz); | |
3082 | } | |
244ffee7 | 3083 | } |
32090b8e | 3084 | } |
244ffee7 | 3085 | |
32090b8e | 3086 | /* Stash a copy of the prpsinfo structure away for future use. */ |
244ffee7 | 3087 | |
32090b8e KR |
3088 | static void |
3089 | DEFUN (bfd_prpsinfo, (abfd, descdata, descsz, filepos), | |
3090 | bfd * abfd AND | |
3091 | char *descdata AND | |
3092 | int descsz AND | |
3093 | long filepos) | |
3094 | { | |
3095 | asection *newsect; | |
244ffee7 | 3096 | |
32090b8e KR |
3097 | if (descsz == sizeof (prpsinfo_t)) |
3098 | { | |
3099 | if ((core_prpsinfo (abfd) = bfd_alloc (abfd, descsz)) != NULL) | |
244ffee7 | 3100 | { |
32090b8e | 3101 | memcpy (core_prpsinfo (abfd), descdata, descsz); |
244ffee7 | 3102 | } |
244ffee7 | 3103 | } |
244ffee7 JK |
3104 | } |
3105 | ||
244ffee7 | 3106 | static void |
32090b8e KR |
3107 | DEFUN (bfd_fpregset, (abfd, descdata, descsz, filepos), |
3108 | bfd * abfd AND | |
3109 | char *descdata AND | |
3110 | int descsz AND | |
3111 | long filepos) | |
244ffee7 | 3112 | { |
32090b8e | 3113 | asection *newsect; |
244ffee7 | 3114 | |
32090b8e KR |
3115 | newsect = bfd_make_section (abfd, ".reg2"); |
3116 | newsect->_raw_size = descsz; | |
3117 | newsect->filepos = filepos; | |
3118 | newsect->flags = SEC_ALLOC | SEC_HAS_CONTENTS; | |
3119 | newsect->alignment_power = 2; | |
6a3eb9b6 | 3120 | } |
244ffee7 | 3121 | |
32090b8e KR |
3122 | #endif /* HAVE_PROCFS */ |
3123 | ||
3124 | /* Return a pointer to the args (including the command name) that were | |
3125 | seen by the program that generated the core dump. Note that for | |
3126 | some reason, a spurious space is tacked onto the end of the args | |
3127 | in some (at least one anyway) implementations, so strip it off if | |
3128 | it exists. */ | |
3129 | ||
3130 | char * | |
3131 | DEFUN (elf_core_file_failing_command, (abfd), | |
3132 | bfd * abfd) | |
244ffee7 | 3133 | { |
32090b8e KR |
3134 | #ifdef HAVE_PROCFS |
3135 | if (core_prpsinfo (abfd)) | |
3136 | { | |
3137 | prpsinfo_t *p = core_prpsinfo (abfd); | |
3138 | char *scan = p->pr_psargs; | |
3139 | while (*scan++) | |
3140 | {; | |
3141 | } | |
3142 | scan -= 2; | |
3143 | if ((scan > p->pr_psargs) && (*scan == ' ')) | |
3144 | { | |
3145 | *scan = '\000'; | |
3146 | } | |
3147 | return p->pr_psargs; | |
3148 | } | |
3149 | #endif | |
3150 | return NULL; | |
3151 | } | |
244ffee7 | 3152 | |
32090b8e KR |
3153 | /* Return the number of the signal that caused the core dump. Presumably, |
3154 | since we have a core file, we got a signal of some kind, so don't bother | |
3155 | checking the other process status fields, just return the signal number. | |
3156 | */ | |
244ffee7 | 3157 | |
32090b8e KR |
3158 | int |
3159 | DEFUN (elf_core_file_failing_signal, (abfd), | |
3160 | bfd * abfd) | |
3161 | { | |
3162 | #ifdef HAVE_PROCFS | |
3163 | if (core_prstatus (abfd)) | |
3164 | { | |
3165 | return ((prstatus_t *) (core_prstatus (abfd)))->pr_cursig; | |
3166 | } | |
3167 | #endif | |
3168 | return -1; | |
3169 | } | |
244ffee7 | 3170 | |
32090b8e KR |
3171 | /* Check to see if the core file could reasonably be expected to have |
3172 | come for the current executable file. Note that by default we return | |
3173 | true unless we find something that indicates that there might be a | |
3174 | problem. | |
3175 | */ | |
244ffee7 | 3176 | |
32090b8e KR |
3177 | boolean |
3178 | DEFUN (elf_core_file_matches_executable_p, (core_bfd, exec_bfd), | |
3179 | bfd * core_bfd AND | |
3180 | bfd * exec_bfd) | |
3181 | { | |
3182 | #ifdef HAVE_PROCFS | |
3183 | char *corename; | |
3184 | char *execname; | |
3185 | #endif | |
244ffee7 | 3186 | |
32090b8e KR |
3187 | /* First, xvecs must match since both are ELF files for the same target. */ |
3188 | ||
3189 | if (core_bfd->xvec != exec_bfd->xvec) | |
244ffee7 | 3190 | { |
32090b8e | 3191 | bfd_error = system_call_error; |
244ffee7 JK |
3192 | return false; |
3193 | } | |
3194 | ||
32090b8e | 3195 | #ifdef HAVE_PROCFS |
244ffee7 | 3196 | |
32090b8e KR |
3197 | /* If no prpsinfo, just return true. Otherwise, grab the last component |
3198 | of the exec'd pathname from the prpsinfo. */ | |
244ffee7 | 3199 | |
32090b8e | 3200 | if (core_prpsinfo (core_bfd)) |
244ffee7 | 3201 | { |
32090b8e KR |
3202 | corename = (((struct prpsinfo *) core_prpsinfo (core_bfd))->pr_fname); |
3203 | } | |
3204 | else | |
3205 | { | |
3206 | return true; | |
3207 | } | |
244ffee7 | 3208 | |
32090b8e | 3209 | /* Find the last component of the executable pathname. */ |
244ffee7 | 3210 | |
32090b8e KR |
3211 | if ((execname = strrchr (exec_bfd->filename, '/')) != NULL) |
3212 | { | |
3213 | execname++; | |
3214 | } | |
3215 | else | |
3216 | { | |
3217 | execname = (char *) exec_bfd->filename; | |
3218 | } | |
244ffee7 | 3219 | |
32090b8e | 3220 | /* See if they match */ |
244ffee7 | 3221 | |
32090b8e | 3222 | return strcmp (execname, corename) ? false : true; |
244ffee7 | 3223 | |
32090b8e | 3224 | #else |
244ffee7 | 3225 | |
244ffee7 | 3226 | return true; |
244ffee7 | 3227 | |
32090b8e KR |
3228 | #endif /* HAVE_PROCFS */ |
3229 | } | |
244ffee7 | 3230 | |
32090b8e KR |
3231 | /* ELF core files contain a segment of type PT_NOTE, that holds much of |
3232 | the information that would normally be available from the /proc interface | |
3233 | for the process, at the time the process dumped core. Currently this | |
3234 | includes copies of the prstatus, prpsinfo, and fpregset structures. | |
244ffee7 | 3235 | |
32090b8e KR |
3236 | Since these structures are potentially machine dependent in size and |
3237 | ordering, bfd provides two levels of support for them. The first level, | |
3238 | available on all machines since it does not require that the host | |
3239 | have /proc support or the relevant include files, is to create a bfd | |
3240 | section for each of the prstatus, prpsinfo, and fpregset structures, | |
3241 | without any interpretation of their contents. With just this support, | |
3242 | the bfd client will have to interpret the structures itself. Even with | |
3243 | /proc support, it might want these full structures for it's own reasons. | |
244ffee7 | 3244 | |
32090b8e KR |
3245 | In the second level of support, where HAVE_PROCFS is defined, bfd will |
3246 | pick apart the structures to gather some additional information that | |
3247 | clients may want, such as the general register set, the name of the | |
3248 | exec'ed file and its arguments, the signal (if any) that caused the | |
3249 | core dump, etc. | |
244ffee7 | 3250 | |
32090b8e | 3251 | */ |
244ffee7 | 3252 | |
32090b8e KR |
3253 | static boolean |
3254 | DEFUN (elf_corefile_note, (abfd, hdr), | |
244ffee7 | 3255 | bfd * abfd AND |
32090b8e | 3256 | Elf_Internal_Phdr * hdr) |
244ffee7 | 3257 | { |
32090b8e KR |
3258 | Elf_External_Note *x_note_p; /* Elf note, external form */ |
3259 | Elf_Internal_Note i_note; /* Elf note, internal form */ | |
3260 | char *buf = NULL; /* Entire note segment contents */ | |
3261 | char *namedata; /* Name portion of the note */ | |
3262 | char *descdata; /* Descriptor portion of the note */ | |
3263 | char *sectname; /* Name to use for new section */ | |
3264 | long filepos; /* File offset to descriptor data */ | |
3265 | asection *newsect; | |
3266 | ||
3267 | if (hdr->p_filesz > 0 | |
3268 | && (buf = (char *) bfd_xmalloc (hdr->p_filesz)) != NULL | |
3269 | && bfd_seek (abfd, hdr->p_offset, SEEK_SET) != -1 | |
3270 | && bfd_read ((PTR) buf, hdr->p_filesz, 1, abfd) == hdr->p_filesz) | |
3271 | { | |
3272 | x_note_p = (Elf_External_Note *) buf; | |
3273 | while ((char *) x_note_p < (buf + hdr->p_filesz)) | |
3274 | { | |
3275 | i_note.namesz = bfd_h_get_32 (abfd, (bfd_byte *) x_note_p->namesz); | |
3276 | i_note.descsz = bfd_h_get_32 (abfd, (bfd_byte *) x_note_p->descsz); | |
3277 | i_note.type = bfd_h_get_32 (abfd, (bfd_byte *) x_note_p->type); | |
3278 | namedata = x_note_p->name; | |
3279 | descdata = namedata + BFD_ALIGN (i_note.namesz, 4); | |
3280 | filepos = hdr->p_offset + (descdata - buf); | |
3281 | switch (i_note.type) | |
3282 | { | |
3283 | case NT_PRSTATUS: | |
3284 | /* process descdata as prstatus info */ | |
3285 | bfd_prstatus (abfd, descdata, i_note.descsz, filepos); | |
3286 | sectname = ".prstatus"; | |
3287 | break; | |
3288 | case NT_FPREGSET: | |
3289 | /* process descdata as fpregset info */ | |
3290 | bfd_fpregset (abfd, descdata, i_note.descsz, filepos); | |
3291 | sectname = ".fpregset"; | |
3292 | break; | |
3293 | case NT_PRPSINFO: | |
3294 | /* process descdata as prpsinfo */ | |
3295 | bfd_prpsinfo (abfd, descdata, i_note.descsz, filepos); | |
3296 | sectname = ".prpsinfo"; | |
3297 | break; | |
3298 | default: | |
3299 | /* Unknown descriptor, just ignore it. */ | |
3300 | sectname = NULL; | |
3301 | break; | |
3302 | } | |
3303 | if (sectname != NULL) | |
3304 | { | |
3305 | newsect = bfd_make_section (abfd, sectname); | |
3306 | newsect->_raw_size = i_note.descsz; | |
3307 | newsect->filepos = filepos; | |
3308 | newsect->flags = SEC_ALLOC | SEC_HAS_CONTENTS; | |
3309 | newsect->alignment_power = 2; | |
3310 | } | |
3311 | x_note_p = (Elf_External_Note *) | |
3312 | (descdata + BFD_ALIGN (i_note.descsz, 4)); | |
3313 | } | |
3314 | } | |
3315 | if (buf != NULL) | |
3316 | { | |
3317 | free (buf); | |
3318 | } | |
3319 | return true; | |
244ffee7 | 3320 | |
244ffee7 JK |
3321 | } |
3322 | ||
32090b8e KR |
3323 | /* Core files are simply standard ELF formatted files that partition |
3324 | the file using the execution view of the file (program header table) | |
3325 | rather than the linking view. In fact, there is no section header | |
3326 | table in a core file. | |
3327 | ||
3328 | The process status information (including the contents of the general | |
3329 | register set) and the floating point register set are stored in a | |
3330 | segment of type PT_NOTE. We handcraft a couple of extra bfd sections | |
3331 | that allow standard bfd access to the general registers (.reg) and the | |
3332 | floating point registers (.reg2). | |
3333 | ||
3334 | */ | |
3335 | ||
3336 | bfd_target * | |
3337 | DEFUN (elf_core_file_p, (abfd), bfd * abfd) | |
244ffee7 | 3338 | { |
32090b8e KR |
3339 | Elf_External_Ehdr x_ehdr; /* Elf file header, external form */ |
3340 | Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */ | |
3341 | Elf_External_Phdr x_phdr; /* Program header table entry, external form */ | |
3342 | Elf_Internal_Phdr *i_phdrp; /* Program header table, internal form */ | |
3343 | unsigned int phindex; | |
244ffee7 | 3344 | |
32090b8e KR |
3345 | /* Read in the ELF header in external format. */ |
3346 | ||
3347 | if (bfd_read ((PTR) & x_ehdr, sizeof (x_ehdr), 1, abfd) != sizeof (x_ehdr)) | |
244ffee7 | 3348 | { |
32090b8e | 3349 | bfd_error = system_call_error; |
244ffee7 JK |
3350 | return NULL; |
3351 | } | |
32090b8e KR |
3352 | |
3353 | /* Now check to see if we have a valid ELF file, and one that BFD can | |
3354 | make use of. The magic number must match, the address size ('class') | |
3355 | and byte-swapping must match our XVEC entry, and it must have a | |
3356 | program header table (FIXME: See comments re segments at top of this | |
3357 | file). */ | |
3358 | ||
3359 | if (elf_file_p (&x_ehdr) == false) | |
244ffee7 | 3360 | { |
32090b8e KR |
3361 | wrong: |
3362 | bfd_error = wrong_format; | |
3363 | return NULL; | |
244ffee7 | 3364 | } |
244ffee7 | 3365 | |
32090b8e | 3366 | /* FIXME, Check EI_VERSION here ! */ |
244ffee7 | 3367 | |
32090b8e KR |
3368 | { |
3369 | #if ARCH_SIZE == 32 | |
3370 | int desired_address_size = ELFCLASS32; | |
3371 | #endif | |
3372 | #if ARCH_SIZE == 64 | |
3373 | int desired_address_size = ELFCLASS64; | |
3374 | #endif | |
3375 | ||
3376 | if (x_ehdr.e_ident[EI_CLASS] != desired_address_size) | |
3377 | goto wrong; | |
3378 | } | |
3379 | ||
3380 | /* Switch xvec to match the specified byte order. */ | |
3381 | switch (x_ehdr.e_ident[EI_DATA]) | |
244ffee7 | 3382 | { |
32090b8e KR |
3383 | case ELFDATA2MSB: /* Big-endian */ |
3384 | if (abfd->xvec->byteorder_big_p == false) | |
3385 | goto wrong; | |
244ffee7 | 3386 | break; |
32090b8e KR |
3387 | case ELFDATA2LSB: /* Little-endian */ |
3388 | if (abfd->xvec->byteorder_big_p == true) | |
3389 | goto wrong; | |
244ffee7 | 3390 | break; |
32090b8e KR |
3391 | case ELFDATANONE: /* No data encoding specified */ |
3392 | default: /* Unknown data encoding specified */ | |
3393 | goto wrong; | |
244ffee7 JK |
3394 | } |
3395 | ||
32090b8e KR |
3396 | /* Allocate an instance of the elf_obj_tdata structure and hook it up to |
3397 | the tdata pointer in the bfd. */ | |
244ffee7 | 3398 | |
32090b8e KR |
3399 | elf_tdata (abfd) = |
3400 | (struct elf_obj_tdata *) bfd_zalloc (abfd, sizeof (struct elf_obj_tdata)); | |
3401 | if (elf_tdata (abfd) == NULL) | |
244ffee7 | 3402 | { |
32090b8e KR |
3403 | bfd_error = no_memory; |
3404 | return NULL; | |
244ffee7 | 3405 | } |
244ffee7 | 3406 | |
32090b8e | 3407 | /* FIXME, `wrong' returns from this point onward, leak memory. */ |
244ffee7 | 3408 | |
32090b8e KR |
3409 | /* Now that we know the byte order, swap in the rest of the header */ |
3410 | i_ehdrp = elf_elfheader (abfd); | |
3411 | elf_swap_ehdr_in (abfd, &x_ehdr, i_ehdrp); | |
3412 | #if DEBUG & 1 | |
3413 | elf_debug_file (i_ehdrp); | |
3414 | #endif | |
244ffee7 | 3415 | |
32090b8e KR |
3416 | /* If there is no program header, or the type is not a core file, then |
3417 | we are hosed. */ | |
3418 | if (i_ehdrp->e_phoff == 0 || i_ehdrp->e_type != ET_CORE) | |
3419 | goto wrong; | |
244ffee7 | 3420 | |
32090b8e KR |
3421 | /* Allocate space for a copy of the program header table in |
3422 | internal form, seek to the program header table in the file, | |
3423 | read it in, and convert it to internal form. As a simple sanity | |
3424 | check, verify that the what BFD thinks is the size of each program | |
3425 | header table entry actually matches the size recorded in the file. */ | |
3426 | ||
3427 | if (i_ehdrp->e_phentsize != sizeof (x_phdr)) | |
3428 | goto wrong; | |
3429 | i_phdrp = (Elf_Internal_Phdr *) | |
3430 | bfd_alloc (abfd, sizeof (*i_phdrp) * i_ehdrp->e_phnum); | |
3431 | if (!i_phdrp) | |
244ffee7 | 3432 | { |
32090b8e KR |
3433 | bfd_error = no_memory; |
3434 | return NULL; | |
3435 | } | |
3436 | if (bfd_seek (abfd, i_ehdrp->e_phoff, SEEK_SET) == -1) | |
3437 | { | |
3438 | bfd_error = system_call_error; | |
3439 | return NULL; | |
3440 | } | |
3441 | for (phindex = 0; phindex < i_ehdrp->e_phnum; phindex++) | |
3442 | { | |
3443 | if (bfd_read ((PTR) & x_phdr, sizeof (x_phdr), 1, abfd) | |
3444 | != sizeof (x_phdr)) | |
3445 | { | |
3446 | bfd_error = system_call_error; | |
3447 | return NULL; | |
3448 | } | |
3449 | elf_swap_phdr_in (abfd, &x_phdr, i_phdrp + phindex); | |
244ffee7 JK |
3450 | } |
3451 | ||
32090b8e KR |
3452 | /* Once all of the program headers have been read and converted, we |
3453 | can start processing them. */ | |
244ffee7 | 3454 | |
32090b8e KR |
3455 | for (phindex = 0; phindex < i_ehdrp->e_phnum; phindex++) |
3456 | { | |
3457 | bfd_section_from_phdr (abfd, i_phdrp + phindex, phindex); | |
3458 | if ((i_phdrp + phindex)->p_type == PT_NOTE) | |
3459 | { | |
3460 | elf_corefile_note (abfd, i_phdrp + phindex); | |
3461 | } | |
3462 | } | |
244ffee7 | 3463 | |
32090b8e | 3464 | /* Remember the entry point specified in the ELF file header. */ |
244ffee7 | 3465 | |
32090b8e | 3466 | bfd_get_start_address (abfd) = i_ehdrp->e_entry; |
244ffee7 | 3467 | |
32090b8e | 3468 | return abfd->xvec; |
244ffee7 | 3469 | } |