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244ffee7 | 1 | /* ELF executable support for BFD. |
b9d5cdf0 | 2 | Copyright 1991, 1992, 1993, 1994 Free Software Foundation, Inc. |
244ffee7 JK |
3 | |
4 | Written by Fred Fish @ Cygnus Support, from information published | |
5 | in "UNIX System V Release 4, Programmers Guide: ANSI C and | |
6 | Programming Support Tools". Sufficient support for gdb. | |
7 | ||
8 | Rewritten by Mark Eichin @ Cygnus Support, from information | |
9 | published in "System V Application Binary Interface", chapters 4 | |
10 | and 5, as well as the various "Processor Supplement" documents | |
11 | derived from it. Added support for assembler and other object file | |
12 | utilities. Further work done by Ken Raeburn (Cygnus Support), Michael | |
13 | Meissner (Open Software Foundation), and Peter Hoogenboom (University | |
14 | of Utah) to finish and extend this. | |
15 | ||
16 | This file is part of BFD, the Binary File Descriptor library. | |
17 | ||
18 | This program is free software; you can redistribute it and/or modify | |
19 | it under the terms of the GNU General Public License as published by | |
20 | the Free Software Foundation; either version 2 of the License, or | |
21 | (at your option) any later version. | |
22 | ||
23 | This program is distributed in the hope that it will be useful, | |
24 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
25 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
26 | GNU General Public License for more details. | |
27 | ||
28 | You should have received a copy of the GNU General Public License | |
29 | along with this program; if not, write to the Free Software | |
30 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
31 | ||
244ffee7 JK |
32 | /* Problems and other issues to resolve. |
33 | ||
34 | (1) BFD expects there to be some fixed number of "sections" in | |
35 | the object file. I.E. there is a "section_count" variable in the | |
36 | bfd structure which contains the number of sections. However, ELF | |
37 | supports multiple "views" of a file. In particular, with current | |
38 | implementations, executable files typically have two tables, a | |
39 | program header table and a section header table, both of which | |
40 | partition the executable. | |
41 | ||
42 | In ELF-speak, the "linking view" of the file uses the section header | |
43 | table to access "sections" within the file, and the "execution view" | |
44 | uses the program header table to access "segments" within the file. | |
45 | "Segments" typically may contain all the data from one or more | |
46 | "sections". | |
47 | ||
48 | Note that the section header table is optional in ELF executables, | |
49 | but it is this information that is most useful to gdb. If the | |
50 | section header table is missing, then gdb should probably try | |
51 | to make do with the program header table. (FIXME) | |
52 | ||
6a3eb9b6 KR |
53 | (2) The code in this file is compiled twice, once in 32-bit mode and |
54 | once in 64-bit mode. More of it should be made size-independent | |
55 | and moved into elf.c. | |
56 | ||
d24928c0 KR |
57 | (3) ELF section symbols are handled rather sloppily now. This should |
58 | be cleaned up, and ELF section symbols reconciled with BFD section | |
59 | symbols. | |
60 | */ | |
244ffee7 | 61 | |
32090b8e | 62 | #include <assert.h> |
244ffee7 JK |
63 | #include <string.h> /* For strrchr and friends */ |
64 | #include "bfd.h" | |
65 | #include "sysdep.h" | |
66 | #include "libbfd.h" | |
67 | #include "libelf.h" | |
68 | ||
300adb31 KR |
69 | #ifndef alloca |
70 | PTR alloca (); | |
71 | #endif | |
72 | ||
32090b8e | 73 | /* Renaming structures, typedefs, macros and functions to be size-specific. */ |
244ffee7 | 74 | #define Elf_External_Ehdr NAME(Elf,External_Ehdr) |
244ffee7 | 75 | #define Elf_External_Sym NAME(Elf,External_Sym) |
244ffee7 | 76 | #define Elf_External_Shdr NAME(Elf,External_Shdr) |
244ffee7 | 77 | #define Elf_External_Phdr NAME(Elf,External_Phdr) |
244ffee7 JK |
78 | #define Elf_External_Rel NAME(Elf,External_Rel) |
79 | #define Elf_External_Rela NAME(Elf,External_Rela) | |
244ffee7 | 80 | |
244ffee7 JK |
81 | #define elf_core_file_failing_command NAME(bfd_elf,core_file_failing_command) |
82 | #define elf_core_file_failing_signal NAME(bfd_elf,core_file_failing_signal) | |
83 | #define elf_core_file_matches_executable_p NAME(bfd_elf,core_file_matches_executable_p) | |
84 | #define elf_object_p NAME(bfd_elf,object_p) | |
85 | #define elf_core_file_p NAME(bfd_elf,core_file_p) | |
244ffee7 JK |
86 | #define elf_get_symtab_upper_bound NAME(bfd_elf,get_symtab_upper_bound) |
87 | #define elf_get_reloc_upper_bound NAME(bfd_elf,get_reloc_upper_bound) | |
88 | #define elf_canonicalize_reloc NAME(bfd_elf,canonicalize_reloc) | |
89 | #define elf_get_symtab NAME(bfd_elf,get_symtab) | |
90 | #define elf_make_empty_symbol NAME(bfd_elf,make_empty_symbol) | |
91 | #define elf_get_symbol_info NAME(bfd_elf,get_symbol_info) | |
92 | #define elf_print_symbol NAME(bfd_elf,print_symbol) | |
93 | #define elf_get_lineno NAME(bfd_elf,get_lineno) | |
94 | #define elf_set_arch_mach NAME(bfd_elf,set_arch_mach) | |
95 | #define elf_find_nearest_line NAME(bfd_elf,find_nearest_line) | |
96 | #define elf_sizeof_headers NAME(bfd_elf,sizeof_headers) | |
97 | #define elf_set_section_contents NAME(bfd_elf,set_section_contents) | |
98 | #define elf_no_info_to_howto NAME(bfd_elf,no_info_to_howto) | |
99 | #define elf_no_info_to_howto_rel NAME(bfd_elf,no_info_to_howto_rel) | |
fce36137 | 100 | #define elf_new_section_hook NAME(bfd_elf,new_section_hook) |
32090b8e | 101 | #define write_relocs NAME(bfd_elf,_write_relocs) |
f035cc47 | 102 | #define elf_find_section NAME(bfd_elf,find_section) |
244ffee7 | 103 | |
6a3eb9b6 KR |
104 | #if ARCH_SIZE == 64 |
105 | #define ELF_R_INFO(X,Y) ELF64_R_INFO(X,Y) | |
106 | #define ELF_R_SYM(X) ELF64_R_SYM(X) | |
32090b8e | 107 | #define ELFCLASS ELFCLASS64 |
f035cc47 | 108 | #define FILE_ALIGN 8 |
6a3eb9b6 KR |
109 | #endif |
110 | #if ARCH_SIZE == 32 | |
111 | #define ELF_R_INFO(X,Y) ELF32_R_INFO(X,Y) | |
112 | #define ELF_R_SYM(X) ELF32_R_SYM(X) | |
32090b8e | 113 | #define ELFCLASS ELFCLASS32 |
f035cc47 | 114 | #define FILE_ALIGN 4 |
244ffee7 JK |
115 | #endif |
116 | ||
32090b8e KR |
117 | static int shstrtab_length_fixed; |
118 | ||
119 | struct elf_sect_data { | |
120 | int reloc_sec; | |
121 | /* more? */ | |
122 | }; | |
123 | ||
244ffee7 JK |
124 | /* Forward declarations of static functions */ |
125 | ||
244ffee7 JK |
126 | static struct sec * section_from_elf_index PARAMS ((bfd *, int)); |
127 | ||
128 | static int elf_section_from_bfd_section PARAMS ((bfd *, struct sec *)); | |
129 | ||
130 | static boolean elf_slurp_symbol_table PARAMS ((bfd *, asymbol **)); | |
131 | ||
244ffee7 JK |
132 | static int elf_symbol_from_bfd_symbol PARAMS ((bfd *, |
133 | struct symbol_cache_entry **)); | |
134 | ||
9783e04a | 135 | static boolean elf_map_symbols PARAMS ((bfd *)); |
b9d5cdf0 | 136 | static boolean swap_out_syms PARAMS ((bfd *)); |
244ffee7 | 137 | |
6a3eb9b6 KR |
138 | #ifdef DEBUG |
139 | static void elf_debug_section PARAMS ((char *, int, Elf_Internal_Shdr *)); | |
140 | static void elf_debug_file PARAMS ((Elf_Internal_Ehdr *)); | |
141 | #endif | |
238ac6ec | 142 | |
32090b8e KR |
143 | #define elf_string_from_elf_strtab(abfd,strindex) \ |
144 | elf_string_from_elf_section(abfd,elf_elfheader(abfd)->e_shstrndx,strindex) | |
145 | ||
146 | \f | |
147 | /* Structure swapping routines */ | |
148 | ||
6a3eb9b6 KR |
149 | /* Should perhaps use put_offset, put_word, etc. For now, the two versions |
150 | can be handled by explicitly specifying 32 bits or "the long type". */ | |
238ac6ec KR |
151 | #if ARCH_SIZE == 64 |
152 | #define put_word bfd_h_put_64 | |
153 | #define get_word bfd_h_get_64 | |
154 | #endif | |
155 | #if ARCH_SIZE == 32 | |
156 | #define put_word bfd_h_put_32 | |
157 | #define get_word bfd_h_get_32 | |
158 | #endif | |
159 | ||
244ffee7 JK |
160 | /* Translate an ELF symbol in external format into an ELF symbol in internal |
161 | format. */ | |
162 | ||
163 | static void | |
164 | DEFUN (elf_swap_symbol_in, (abfd, src, dst), | |
165 | bfd * abfd AND | |
166 | Elf_External_Sym * src AND | |
167 | Elf_Internal_Sym * dst) | |
168 | { | |
169 | dst->st_name = bfd_h_get_32 (abfd, (bfd_byte *) src->st_name); | |
238ac6ec KR |
170 | dst->st_value = get_word (abfd, (bfd_byte *) src->st_value); |
171 | dst->st_size = get_word (abfd, (bfd_byte *) src->st_size); | |
244ffee7 JK |
172 | dst->st_info = bfd_h_get_8 (abfd, (bfd_byte *) src->st_info); |
173 | dst->st_other = bfd_h_get_8 (abfd, (bfd_byte *) src->st_other); | |
174 | dst->st_shndx = bfd_h_get_16 (abfd, (bfd_byte *) src->st_shndx); | |
175 | } | |
176 | ||
177 | /* Translate an ELF symbol in internal format into an ELF symbol in external | |
178 | format. */ | |
179 | ||
180 | static void | |
181 | DEFUN (elf_swap_symbol_out, (abfd, src, dst), | |
182 | bfd * abfd AND | |
183 | Elf_Internal_Sym * src AND | |
184 | Elf_External_Sym * dst) | |
185 | { | |
186 | bfd_h_put_32 (abfd, src->st_name, dst->st_name); | |
238ac6ec KR |
187 | put_word (abfd, src->st_value, dst->st_value); |
188 | put_word (abfd, src->st_size, dst->st_size); | |
244ffee7 JK |
189 | bfd_h_put_8 (abfd, src->st_info, dst->st_info); |
190 | bfd_h_put_8 (abfd, src->st_other, dst->st_other); | |
191 | bfd_h_put_16 (abfd, src->st_shndx, dst->st_shndx); | |
192 | } | |
193 | ||
194 | ||
195 | /* Translate an ELF file header in external format into an ELF file header in | |
196 | internal format. */ | |
197 | ||
198 | static void | |
199 | DEFUN (elf_swap_ehdr_in, (abfd, src, dst), | |
200 | bfd * abfd AND | |
201 | Elf_External_Ehdr * src AND | |
202 | Elf_Internal_Ehdr * dst) | |
203 | { | |
204 | memcpy (dst->e_ident, src->e_ident, EI_NIDENT); | |
205 | dst->e_type = bfd_h_get_16 (abfd, (bfd_byte *) src->e_type); | |
206 | dst->e_machine = bfd_h_get_16 (abfd, (bfd_byte *) src->e_machine); | |
207 | dst->e_version = bfd_h_get_32 (abfd, (bfd_byte *) src->e_version); | |
238ac6ec KR |
208 | dst->e_entry = get_word (abfd, (bfd_byte *) src->e_entry); |
209 | dst->e_phoff = get_word (abfd, (bfd_byte *) src->e_phoff); | |
210 | dst->e_shoff = get_word (abfd, (bfd_byte *) src->e_shoff); | |
244ffee7 JK |
211 | dst->e_flags = bfd_h_get_32 (abfd, (bfd_byte *) src->e_flags); |
212 | dst->e_ehsize = bfd_h_get_16 (abfd, (bfd_byte *) src->e_ehsize); | |
213 | dst->e_phentsize = bfd_h_get_16 (abfd, (bfd_byte *) src->e_phentsize); | |
214 | dst->e_phnum = bfd_h_get_16 (abfd, (bfd_byte *) src->e_phnum); | |
215 | dst->e_shentsize = bfd_h_get_16 (abfd, (bfd_byte *) src->e_shentsize); | |
216 | dst->e_shnum = bfd_h_get_16 (abfd, (bfd_byte *) src->e_shnum); | |
217 | dst->e_shstrndx = bfd_h_get_16 (abfd, (bfd_byte *) src->e_shstrndx); | |
218 | } | |
219 | ||
220 | /* Translate an ELF file header in internal format into an ELF file header in | |
221 | external format. */ | |
222 | ||
223 | static void | |
224 | DEFUN (elf_swap_ehdr_out, (abfd, src, dst), | |
225 | bfd * abfd AND | |
226 | Elf_Internal_Ehdr * src AND | |
227 | Elf_External_Ehdr * dst) | |
228 | { | |
229 | memcpy (dst->e_ident, src->e_ident, EI_NIDENT); | |
230 | /* note that all elements of dst are *arrays of unsigned char* already... */ | |
231 | bfd_h_put_16 (abfd, src->e_type, dst->e_type); | |
232 | bfd_h_put_16 (abfd, src->e_machine, dst->e_machine); | |
233 | bfd_h_put_32 (abfd, src->e_version, dst->e_version); | |
238ac6ec KR |
234 | put_word (abfd, src->e_entry, dst->e_entry); |
235 | put_word (abfd, src->e_phoff, dst->e_phoff); | |
236 | put_word (abfd, src->e_shoff, dst->e_shoff); | |
244ffee7 JK |
237 | bfd_h_put_32 (abfd, src->e_flags, dst->e_flags); |
238 | bfd_h_put_16 (abfd, src->e_ehsize, dst->e_ehsize); | |
239 | bfd_h_put_16 (abfd, src->e_phentsize, dst->e_phentsize); | |
240 | bfd_h_put_16 (abfd, src->e_phnum, dst->e_phnum); | |
241 | bfd_h_put_16 (abfd, src->e_shentsize, dst->e_shentsize); | |
242 | bfd_h_put_16 (abfd, src->e_shnum, dst->e_shnum); | |
243 | bfd_h_put_16 (abfd, src->e_shstrndx, dst->e_shstrndx); | |
244 | } | |
245 | ||
246 | ||
247 | /* Translate an ELF section header table entry in external format into an | |
248 | ELF section header table entry in internal format. */ | |
249 | ||
250 | static void | |
251 | DEFUN (elf_swap_shdr_in, (abfd, src, dst), | |
252 | bfd * abfd AND | |
253 | Elf_External_Shdr * src AND | |
254 | Elf_Internal_Shdr * dst) | |
255 | { | |
256 | dst->sh_name = bfd_h_get_32 (abfd, (bfd_byte *) src->sh_name); | |
257 | dst->sh_type = bfd_h_get_32 (abfd, (bfd_byte *) src->sh_type); | |
238ac6ec KR |
258 | dst->sh_flags = get_word (abfd, (bfd_byte *) src->sh_flags); |
259 | dst->sh_addr = get_word (abfd, (bfd_byte *) src->sh_addr); | |
260 | dst->sh_offset = get_word (abfd, (bfd_byte *) src->sh_offset); | |
261 | dst->sh_size = get_word (abfd, (bfd_byte *) src->sh_size); | |
244ffee7 JK |
262 | dst->sh_link = bfd_h_get_32 (abfd, (bfd_byte *) src->sh_link); |
263 | dst->sh_info = bfd_h_get_32 (abfd, (bfd_byte *) src->sh_info); | |
238ac6ec KR |
264 | dst->sh_addralign = get_word (abfd, (bfd_byte *) src->sh_addralign); |
265 | dst->sh_entsize = get_word (abfd, (bfd_byte *) src->sh_entsize); | |
244ffee7 JK |
266 | /* we haven't done any processing on it yet, so... */ |
267 | dst->rawdata = (void *) 0; | |
268 | } | |
269 | ||
270 | /* Translate an ELF section header table entry in internal format into an | |
271 | ELF section header table entry in external format. */ | |
272 | ||
273 | static void | |
274 | DEFUN (elf_swap_shdr_out, (abfd, src, dst), | |
275 | bfd * abfd AND | |
276 | Elf_Internal_Shdr * src AND | |
277 | Elf_External_Shdr * dst) | |
278 | { | |
279 | /* note that all elements of dst are *arrays of unsigned char* already... */ | |
280 | bfd_h_put_32 (abfd, src->sh_name, dst->sh_name); | |
281 | bfd_h_put_32 (abfd, src->sh_type, dst->sh_type); | |
238ac6ec KR |
282 | put_word (abfd, src->sh_flags, dst->sh_flags); |
283 | put_word (abfd, src->sh_addr, dst->sh_addr); | |
284 | put_word (abfd, src->sh_offset, dst->sh_offset); | |
285 | put_word (abfd, src->sh_size, dst->sh_size); | |
244ffee7 JK |
286 | bfd_h_put_32 (abfd, src->sh_link, dst->sh_link); |
287 | bfd_h_put_32 (abfd, src->sh_info, dst->sh_info); | |
238ac6ec KR |
288 | put_word (abfd, src->sh_addralign, dst->sh_addralign); |
289 | put_word (abfd, src->sh_entsize, dst->sh_entsize); | |
244ffee7 JK |
290 | } |
291 | ||
292 | ||
293 | /* Translate an ELF program header table entry in external format into an | |
294 | ELF program header table entry in internal format. */ | |
295 | ||
296 | static void | |
297 | DEFUN (elf_swap_phdr_in, (abfd, src, dst), | |
298 | bfd * abfd AND | |
299 | Elf_External_Phdr * src AND | |
300 | Elf_Internal_Phdr * dst) | |
301 | { | |
302 | dst->p_type = bfd_h_get_32 (abfd, (bfd_byte *) src->p_type); | |
244ffee7 | 303 | dst->p_flags = bfd_h_get_32 (abfd, (bfd_byte *) src->p_flags); |
238ac6ec KR |
304 | dst->p_offset = get_word (abfd, (bfd_byte *) src->p_offset); |
305 | dst->p_vaddr = get_word (abfd, (bfd_byte *) src->p_vaddr); | |
306 | dst->p_paddr = get_word (abfd, (bfd_byte *) src->p_paddr); | |
307 | dst->p_filesz = get_word (abfd, (bfd_byte *) src->p_filesz); | |
308 | dst->p_memsz = get_word (abfd, (bfd_byte *) src->p_memsz); | |
309 | dst->p_align = get_word (abfd, (bfd_byte *) src->p_align); | |
244ffee7 JK |
310 | } |
311 | ||
244ffee7 JK |
312 | static void |
313 | DEFUN (elf_swap_phdr_out, (abfd, src, dst), | |
314 | bfd * abfd AND | |
315 | Elf_Internal_Phdr * src AND | |
316 | Elf_External_Phdr * dst) | |
317 | { | |
318 | /* note that all elements of dst are *arrays of unsigned char* already... */ | |
319 | bfd_h_put_32 (abfd, src->p_type, dst->p_type); | |
94dbb655 KR |
320 | put_word (abfd, src->p_offset, dst->p_offset); |
321 | put_word (abfd, src->p_vaddr, dst->p_vaddr); | |
322 | put_word (abfd, src->p_paddr, dst->p_paddr); | |
323 | put_word (abfd, src->p_filesz, dst->p_filesz); | |
324 | put_word (abfd, src->p_memsz, dst->p_memsz); | |
244ffee7 | 325 | bfd_h_put_32 (abfd, src->p_flags, dst->p_flags); |
94dbb655 | 326 | put_word (abfd, src->p_align, dst->p_align); |
244ffee7 JK |
327 | } |
328 | ||
329 | /* Translate an ELF reloc from external format to internal format. */ | |
32090b8e | 330 | static INLINE void |
244ffee7 JK |
331 | DEFUN (elf_swap_reloc_in, (abfd, src, dst), |
332 | bfd * abfd AND | |
333 | Elf_External_Rel * src AND | |
334 | Elf_Internal_Rel * dst) | |
335 | { | |
94dbb655 KR |
336 | dst->r_offset = get_word (abfd, (bfd_byte *) src->r_offset); |
337 | dst->r_info = get_word (abfd, (bfd_byte *) src->r_info); | |
244ffee7 JK |
338 | } |
339 | ||
32090b8e | 340 | static INLINE void |
244ffee7 JK |
341 | DEFUN (elf_swap_reloca_in, (abfd, src, dst), |
342 | bfd * abfd AND | |
343 | Elf_External_Rela * src AND | |
344 | Elf_Internal_Rela * dst) | |
345 | { | |
94dbb655 KR |
346 | dst->r_offset = get_word (abfd, (bfd_byte *) src->r_offset); |
347 | dst->r_info = get_word (abfd, (bfd_byte *) src->r_info); | |
348 | dst->r_addend = get_word (abfd, (bfd_byte *) src->r_addend); | |
244ffee7 JK |
349 | } |
350 | ||
351 | /* Translate an ELF reloc from internal format to external format. */ | |
32090b8e | 352 | static INLINE void |
244ffee7 JK |
353 | DEFUN (elf_swap_reloc_out, (abfd, src, dst), |
354 | bfd * abfd AND | |
355 | Elf_Internal_Rel * src AND | |
356 | Elf_External_Rel * dst) | |
357 | { | |
94dbb655 KR |
358 | put_word (abfd, src->r_offset, dst->r_offset); |
359 | put_word (abfd, src->r_info, dst->r_info); | |
244ffee7 JK |
360 | } |
361 | ||
32090b8e | 362 | static INLINE void |
244ffee7 JK |
363 | DEFUN (elf_swap_reloca_out, (abfd, src, dst), |
364 | bfd * abfd AND | |
365 | Elf_Internal_Rela * src AND | |
366 | Elf_External_Rela * dst) | |
367 | { | |
94dbb655 KR |
368 | put_word (abfd, src->r_offset, dst->r_offset); |
369 | put_word (abfd, src->r_info, dst->r_info); | |
370 | put_word (abfd, src->r_addend, dst->r_addend); | |
244ffee7 JK |
371 | } |
372 | ||
32090b8e KR |
373 | \f |
374 | ||
375 | /* String table creation/manipulation routines */ | |
376 | ||
377 | static struct strtab * | |
378 | DEFUN (bfd_new_strtab, (abfd), | |
379 | bfd * abfd) | |
380 | { | |
381 | struct strtab *ss; | |
382 | ||
b9d5cdf0 DM |
383 | ss = (struct strtab *) malloc (sizeof (struct strtab)); |
384 | if (!ss) | |
385 | { | |
d1ad85a6 | 386 | bfd_set_error (bfd_error_no_memory); |
b9d5cdf0 DM |
387 | return NULL; |
388 | } | |
389 | ss->tab = malloc (1); | |
390 | if (!ss->tab) | |
391 | { | |
d1ad85a6 | 392 | bfd_set_error (bfd_error_no_memory); |
b9d5cdf0 DM |
393 | return NULL; |
394 | } | |
32090b8e KR |
395 | *ss->tab = 0; |
396 | ss->nentries = 0; | |
397 | ss->length = 1; | |
244ffee7 | 398 | |
32090b8e KR |
399 | return ss; |
400 | } | |
401 | ||
402 | static int | |
403 | DEFUN (bfd_add_to_strtab, (abfd, ss, str), | |
404 | bfd * abfd AND | |
405 | struct strtab *ss AND | |
406 | CONST char *str) | |
407 | { | |
408 | /* should search first, but for now: */ | |
409 | /* include the trailing NUL */ | |
410 | int ln = strlen (str) + 1; | |
411 | ||
412 | /* should this be using obstacks? */ | |
413 | ss->tab = realloc (ss->tab, ss->length + ln); | |
414 | ||
9783e04a | 415 | BFD_ASSERT (ss->tab != 0); /* FIXME */ |
32090b8e KR |
416 | strcpy (ss->tab + ss->length, str); |
417 | ss->nentries++; | |
418 | ss->length += ln; | |
419 | ||
420 | return ss->length - ln; | |
421 | } | |
422 | ||
423 | static int | |
424 | DEFUN (bfd_add_2_to_strtab, (abfd, ss, str, str2), | |
425 | bfd * abfd AND | |
426 | struct strtab *ss AND | |
427 | char *str AND | |
428 | CONST char *str2) | |
244ffee7 | 429 | { |
32090b8e KR |
430 | /* should search first, but for now: */ |
431 | /* include the trailing NUL */ | |
432 | int ln = strlen (str) + strlen (str2) + 1; | |
433 | ||
434 | /* should this be using obstacks? */ | |
435 | if (ss->length) | |
436 | ss->tab = realloc (ss->tab, ss->length + ln); | |
437 | else | |
b9d5cdf0 | 438 | ss->tab = malloc (ln); |
32090b8e | 439 | |
9783e04a | 440 | BFD_ASSERT (ss->tab != 0); /* FIXME */ |
32090b8e KR |
441 | strcpy (ss->tab + ss->length, str); |
442 | strcpy (ss->tab + ss->length + strlen (str), str2); | |
443 | ss->nentries++; | |
444 | ss->length += ln; | |
445 | ||
446 | return ss->length - ln; | |
244ffee7 JK |
447 | } |
448 | ||
32090b8e KR |
449 | \f |
450 | /* ELF .o/exec file reading */ | |
451 | ||
452 | /* Create a new bfd section from an ELF section header. */ | |
453 | ||
244ffee7 JK |
454 | static boolean |
455 | DEFUN (bfd_section_from_shdr, (abfd, shindex), | |
456 | bfd * abfd AND | |
457 | unsigned int shindex) | |
458 | { | |
32090b8e KR |
459 | Elf_Internal_Shdr *hdr = elf_elfsections (abfd)[shindex]; |
460 | Elf_Internal_Ehdr *ehdr = elf_elfheader (abfd); | |
244ffee7 JK |
461 | asection *newsect; |
462 | char *name; | |
463 | ||
464 | name = elf_string_from_elf_strtab (abfd, hdr->sh_name); | |
465 | ||
466 | switch (hdr->sh_type) | |
467 | { | |
468 | ||
469 | case SHT_NULL: | |
470 | /* inactive section. Throw it away. */ | |
471 | return true; | |
472 | ||
473 | case SHT_PROGBITS: | |
474 | /* Bits that get saved. This one is real. */ | |
475 | if (!hdr->rawdata) | |
476 | { | |
477 | newsect = bfd_make_section (abfd, name); | |
478 | if (newsect != NULL) | |
479 | { | |
32090b8e KR |
480 | newsect->filepos = hdr->sh_offset; /* so we can read back the bits */ |
481 | newsect->flags |= SEC_HAS_CONTENTS; | |
244ffee7 JK |
482 | newsect->vma = hdr->sh_addr; |
483 | newsect->_raw_size = hdr->sh_size; | |
6a3eb9b6 | 484 | newsect->alignment_power = bfd_log2 (hdr->sh_addralign); |
244ffee7 JK |
485 | |
486 | if (hdr->sh_flags & SHF_ALLOC) | |
487 | { | |
488 | newsect->flags |= SEC_ALLOC; | |
489 | newsect->flags |= SEC_LOAD; | |
490 | } | |
491 | ||
492 | if (!(hdr->sh_flags & SHF_WRITE)) | |
493 | newsect->flags |= SEC_READONLY; | |
494 | ||
495 | if (hdr->sh_flags & SHF_EXECINSTR) | |
32090b8e | 496 | newsect->flags |= SEC_CODE; /* FIXME: may only contain SOME code */ |
36d541b1 | 497 | else if (newsect->flags & SEC_ALLOC) |
244ffee7 JK |
498 | newsect->flags |= SEC_DATA; |
499 | ||
d6e5f950 ILT |
500 | /* The debugging sections appear to recognized only by |
501 | name. */ | |
502 | if (strncmp (name, ".debug", sizeof ".debug" - 1) == 0 | |
503 | || strncmp (name, ".line", sizeof ".line" - 1) == 0 | |
504 | || strncmp (name, ".stab", sizeof ".stab" - 1) == 0) | |
505 | newsect->flags |= SEC_DEBUGGING; | |
506 | ||
244ffee7 JK |
507 | hdr->rawdata = (void *) newsect; |
508 | } | |
94dbb655 KR |
509 | else |
510 | hdr->rawdata = (void *) bfd_get_section_by_name (abfd, name); | |
244ffee7 JK |
511 | } |
512 | return true; | |
513 | ||
514 | case SHT_NOBITS: | |
515 | /* Bits that get saved. This one is real. */ | |
516 | if (!hdr->rawdata) | |
517 | { | |
518 | newsect = bfd_make_section (abfd, name); | |
519 | if (newsect != NULL) | |
520 | { | |
521 | newsect->vma = hdr->sh_addr; | |
522 | newsect->_raw_size = hdr->sh_size; | |
523 | newsect->filepos = hdr->sh_offset; /* fake */ | |
6a3eb9b6 | 524 | newsect->alignment_power = bfd_log2 (hdr->sh_addralign); |
244ffee7 JK |
525 | if (hdr->sh_flags & SHF_ALLOC) |
526 | newsect->flags |= SEC_ALLOC; | |
527 | ||
528 | if (!(hdr->sh_flags & SHF_WRITE)) | |
529 | newsect->flags |= SEC_READONLY; | |
530 | ||
36d541b1 ILT |
531 | /* FIXME: This section is empty. Does it really make |
532 | sense to set SEC_CODE for it? */ | |
244ffee7 JK |
533 | if (hdr->sh_flags & SHF_EXECINSTR) |
534 | newsect->flags |= SEC_CODE; /* FIXME: may only contain SOME code */ | |
244ffee7 JK |
535 | |
536 | hdr->rawdata = (void *) newsect; | |
537 | } | |
538 | } | |
539 | return true; | |
540 | ||
541 | case SHT_SYMTAB: /* A symbol table */ | |
32090b8e KR |
542 | if (elf_onesymtab (abfd) == shindex) |
543 | return true; | |
544 | ||
244ffee7 | 545 | BFD_ASSERT (hdr->sh_entsize == sizeof (Elf_External_Sym)); |
32090b8e | 546 | BFD_ASSERT (elf_onesymtab (abfd) == 0); |
244ffee7 | 547 | elf_onesymtab (abfd) = shindex; |
32090b8e KR |
548 | elf_tdata(abfd)->symtab_hdr = *hdr; |
549 | elf_elfsections(abfd)[shindex] = &elf_tdata(abfd)->symtab_hdr; | |
244ffee7 JK |
550 | abfd->flags |= HAS_SYMS; |
551 | return true; | |
552 | ||
553 | case SHT_STRTAB: /* A string table */ | |
32090b8e | 554 | if (hdr->rawdata) |
fce36137 | 555 | return true; |
32090b8e KR |
556 | if (ehdr->e_shstrndx == shindex) |
557 | { | |
558 | elf_tdata(abfd)->shstrtab_hdr = *hdr; | |
559 | elf_elfsections(abfd)[shindex] = &elf_tdata(abfd)->shstrtab_hdr; | |
560 | hdr->rawdata = (PTR) &elf_tdata(abfd)->shstrtab_hdr; | |
561 | return true; | |
562 | } | |
563 | { | |
564 | int i; | |
fce36137 | 565 | |
32090b8e KR |
566 | for (i = 1; i < ehdr->e_shnum; i++) |
567 | { | |
568 | Elf_Internal_Shdr *hdr2 = elf_elfsections(abfd)[i]; | |
569 | if (hdr2->sh_link == shindex) | |
570 | { | |
571 | bfd_section_from_shdr (abfd, i); | |
572 | if (elf_onesymtab (abfd) == i) | |
573 | { | |
574 | elf_tdata(abfd)->strtab_hdr = *hdr; | |
575 | elf_elfsections(abfd)[shindex] = &elf_tdata(abfd)->strtab_hdr; | |
576 | return true; | |
577 | } | |
578 | #if 0 /* Not handling other string tables specially right now. */ | |
579 | hdr2 = elf_elfsections(abfd)[i]; /* in case it moved */ | |
580 | /* We have a strtab for some random other section. */ | |
581 | newsect = (asection *) hdr2->rawdata; | |
582 | if (!newsect) | |
583 | break; | |
584 | hdr->rawdata = (PTR) newsect; | |
585 | hdr2 = &elf_section_data (newsect)->str_hdr; | |
586 | *hdr2 = *hdr; | |
587 | elf_elfsections(abfd)[shindex] = hdr2; | |
588 | #endif | |
589 | } | |
590 | } | |
591 | } | |
592 | ||
593 | newsect = bfd_make_section (abfd, name); | |
594 | if (newsect) | |
fce36137 | 595 | { |
32090b8e KR |
596 | newsect->flags = SEC_HAS_CONTENTS; |
597 | hdr->rawdata = (PTR) newsect; | |
598 | newsect->_raw_size = hdr->sh_size; | |
9783e04a DM |
599 | newsect->alignment_power = bfd_log2 (hdr->sh_addralign); |
600 | newsect->vma = hdr->sh_addr; | |
f035cc47 | 601 | newsect->filepos = hdr->sh_offset; |
32090b8e KR |
602 | |
603 | if (hdr->sh_flags & SHF_ALLOC) | |
604 | newsect->flags |= SEC_ALLOC|SEC_LOAD; | |
605 | if (!(hdr->sh_flags & SHF_WRITE)) | |
606 | newsect->flags |= SEC_READONLY; | |
607 | if (hdr->sh_flags & SHF_EXECINSTR) | |
608 | newsect->flags |= SEC_CODE; | |
36d541b1 | 609 | else if (newsect->flags & SEC_ALLOC) |
32090b8e | 610 | newsect->flags |= SEC_DATA; |
01383fb4 KR |
611 | |
612 | /* Check for debugging string tables. */ | |
613 | if (strncmp (name, ".debug", sizeof ".debug" - 1) == 0 | |
614 | || strncmp (name, ".stab", sizeof ".stab" - 1) == 0) | |
615 | newsect->flags |= SEC_DEBUGGING; | |
fce36137 KR |
616 | } |
617 | ||
244ffee7 JK |
618 | return true; |
619 | ||
620 | case SHT_REL: | |
621 | case SHT_RELA: | |
32090b8e KR |
622 | /* *These* do a lot of work -- but build no sections! |
623 | The spec says there can be multiple strtabs, but only one symtab, | |
624 | but there can be lots of REL* sections. */ | |
244ffee7 | 625 | /* FIXME: The above statement is wrong! There are typically at least |
32090b8e KR |
626 | two symbol tables in a dynamically linked executable, ".dynsym" |
627 | which is the dynamic linkage symbol table and ".symtab", which is | |
628 | the "traditional" symbol table. -fnf */ | |
244ffee7 JK |
629 | |
630 | { | |
631 | asection *target_sect; | |
32090b8e | 632 | Elf_Internal_Shdr *hdr2; |
244ffee7 JK |
633 | int use_rela_p = get_elf_backend_data (abfd)->use_rela_p; |
634 | ||
635 | /* Don't allow REL relocations on a machine that uses RELA and | |
636 | vice versa. */ | |
637 | /* @@ Actually, the generic ABI does suggest that both might be | |
638 | used in one file. But the four ABI Processor Supplements I | |
639 | have access to right now all specify that only one is used on | |
640 | each of those architectures. It's conceivable that, e.g., a | |
641 | bunch of absolute 32-bit relocs might be more compact in REL | |
642 | form even on a RELA machine... */ | |
643 | BFD_ASSERT (!(use_rela_p && (hdr->sh_type == SHT_REL))); | |
644 | BFD_ASSERT (!(!use_rela_p && (hdr->sh_type == SHT_RELA))); | |
645 | BFD_ASSERT (hdr->sh_entsize == | |
646 | (use_rela_p | |
6a3eb9b6 KR |
647 | ? sizeof (Elf_External_Rela) |
648 | : sizeof (Elf_External_Rel))); | |
244ffee7 | 649 | |
244ffee7 | 650 | bfd_section_from_shdr (abfd, hdr->sh_info); /* target */ |
32090b8e | 651 | bfd_section_from_shdr (abfd, hdr->sh_link); /* symbol table */ |
244ffee7 | 652 | target_sect = section_from_elf_index (abfd, hdr->sh_info); |
062189c6 ILT |
653 | if (target_sect == NULL |
654 | || elf_section_data (target_sect) == NULL) | |
244ffee7 JK |
655 | return false; |
656 | ||
32090b8e KR |
657 | hdr2 = &elf_section_data (target_sect)->rel_hdr; |
658 | *hdr2 = *hdr; | |
659 | elf_elfsections(abfd)[shindex] = hdr2; | |
244ffee7 JK |
660 | target_sect->reloc_count = hdr->sh_size / hdr->sh_entsize; |
661 | target_sect->flags |= SEC_RELOC; | |
662 | target_sect->relocation = 0; | |
663 | target_sect->rel_filepos = hdr->sh_offset; | |
32090b8e | 664 | abfd->flags |= HAS_RELOC; |
244ffee7 JK |
665 | return true; |
666 | } | |
667 | break; | |
668 | ||
669 | case SHT_HASH: | |
670 | case SHT_DYNAMIC: | |
671 | case SHT_DYNSYM: /* could treat this like symtab... */ | |
672 | #if 0 | |
673 | fprintf (stderr, "Dynamic Linking sections not yet supported.\n"); | |
674 | BFD_FAIL (); | |
675 | #endif | |
676 | break; | |
677 | ||
678 | case SHT_NOTE: | |
679 | #if 0 | |
680 | fprintf (stderr, "Note Sections not yet supported.\n"); | |
681 | BFD_FAIL (); | |
682 | #endif | |
683 | break; | |
684 | ||
685 | case SHT_SHLIB: | |
686 | #if 0 | |
687 | fprintf (stderr, "SHLIB Sections not supported (and non conforming.)\n"); | |
688 | #endif | |
689 | return true; | |
690 | ||
691 | default: | |
e621c5cc ILT |
692 | /* Check for any processor-specific section types. */ |
693 | { | |
694 | struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
695 | ||
696 | if (bed->elf_backend_section_from_shdr) | |
697 | (*bed->elf_backend_section_from_shdr) (abfd, hdr, name); | |
698 | } | |
244ffee7 JK |
699 | break; |
700 | } | |
701 | ||
702 | return true; | |
703 | } | |
704 | ||
fce36137 KR |
705 | boolean |
706 | DEFUN (elf_new_section_hook, (abfd, sec), | |
707 | bfd *abfd | |
708 | AND asection *sec) | |
709 | { | |
32090b8e | 710 | struct bfd_elf_section_data *sdata; |
300adb31 KR |
711 | |
712 | sdata = (struct bfd_elf_section_data *) bfd_alloc (abfd, sizeof (*sdata)); | |
9783e04a DM |
713 | if (!sdata) |
714 | { | |
d1ad85a6 | 715 | bfd_set_error (bfd_error_no_memory); |
9783e04a DM |
716 | return false; |
717 | } | |
300adb31 | 718 | sec->used_by_bfd = (PTR) sdata; |
32090b8e | 719 | memset (sdata, 0, sizeof (*sdata)); |
244ffee7 JK |
720 | return true; |
721 | } | |
722 | ||
723 | /* Create a new bfd section from an ELF program header. | |
724 | ||
725 | Since program segments have no names, we generate a synthetic name | |
726 | of the form segment<NUM>, where NUM is generally the index in the | |
727 | program header table. For segments that are split (see below) we | |
728 | generate the names segment<NUM>a and segment<NUM>b. | |
729 | ||
730 | Note that some program segments may have a file size that is different than | |
731 | (less than) the memory size. All this means is that at execution the | |
732 | system must allocate the amount of memory specified by the memory size, | |
733 | but only initialize it with the first "file size" bytes read from the | |
734 | file. This would occur for example, with program segments consisting | |
735 | of combined data+bss. | |
736 | ||
737 | To handle the above situation, this routine generates TWO bfd sections | |
738 | for the single program segment. The first has the length specified by | |
739 | the file size of the segment, and the second has the length specified | |
740 | by the difference between the two sizes. In effect, the segment is split | |
741 | into it's initialized and uninitialized parts. | |
742 | ||
743 | */ | |
744 | ||
745 | static boolean | |
746 | DEFUN (bfd_section_from_phdr, (abfd, hdr, index), | |
747 | bfd * abfd AND | |
748 | Elf_Internal_Phdr * hdr AND | |
749 | int index) | |
750 | { | |
751 | asection *newsect; | |
752 | char *name; | |
753 | char namebuf[64]; | |
754 | int split; | |
755 | ||
756 | split = ((hdr->p_memsz > 0) && | |
757 | (hdr->p_filesz > 0) && | |
758 | (hdr->p_memsz > hdr->p_filesz)); | |
759 | sprintf (namebuf, split ? "segment%da" : "segment%d", index); | |
760 | name = bfd_alloc (abfd, strlen (namebuf) + 1); | |
9783e04a DM |
761 | if (!name) |
762 | { | |
d1ad85a6 | 763 | bfd_set_error (bfd_error_no_memory); |
9783e04a DM |
764 | return false; |
765 | } | |
244ffee7 JK |
766 | strcpy (name, namebuf); |
767 | newsect = bfd_make_section (abfd, name); | |
768 | newsect->vma = hdr->p_vaddr; | |
769 | newsect->_raw_size = hdr->p_filesz; | |
770 | newsect->filepos = hdr->p_offset; | |
771 | newsect->flags |= SEC_HAS_CONTENTS; | |
772 | if (hdr->p_type == PT_LOAD) | |
773 | { | |
774 | newsect->flags |= SEC_ALLOC; | |
775 | newsect->flags |= SEC_LOAD; | |
776 | if (hdr->p_flags & PF_X) | |
777 | { | |
778 | /* FIXME: all we known is that it has execute PERMISSION, | |
779 | may be data. */ | |
780 | newsect->flags |= SEC_CODE; | |
781 | } | |
782 | } | |
783 | if (!(hdr->p_flags & PF_W)) | |
784 | { | |
785 | newsect->flags |= SEC_READONLY; | |
786 | } | |
787 | ||
788 | if (split) | |
789 | { | |
790 | sprintf (namebuf, "segment%db", index); | |
791 | name = bfd_alloc (abfd, strlen (namebuf) + 1); | |
9783e04a DM |
792 | if (!name) |
793 | { | |
d1ad85a6 | 794 | bfd_set_error (bfd_error_no_memory); |
9783e04a DM |
795 | return false; |
796 | } | |
244ffee7 JK |
797 | strcpy (name, namebuf); |
798 | newsect = bfd_make_section (abfd, name); | |
799 | newsect->vma = hdr->p_vaddr + hdr->p_filesz; | |
800 | newsect->_raw_size = hdr->p_memsz - hdr->p_filesz; | |
801 | if (hdr->p_type == PT_LOAD) | |
802 | { | |
803 | newsect->flags |= SEC_ALLOC; | |
804 | if (hdr->p_flags & PF_X) | |
805 | newsect->flags |= SEC_CODE; | |
806 | } | |
807 | if (!(hdr->p_flags & PF_W)) | |
808 | newsect->flags |= SEC_READONLY; | |
809 | } | |
810 | ||
811 | return true; | |
812 | } | |
813 | ||
32090b8e | 814 | /* Begin processing a given object. |
244ffee7 | 815 | |
32090b8e KR |
816 | First we validate the file by reading in the ELF header and checking |
817 | the magic number. */ | |
818 | ||
819 | static INLINE boolean | |
820 | DEFUN (elf_file_p, (x_ehdrp), Elf_External_Ehdr * x_ehdrp) | |
244ffee7 | 821 | { |
32090b8e KR |
822 | return ((x_ehdrp->e_ident[EI_MAG0] == ELFMAG0) |
823 | && (x_ehdrp->e_ident[EI_MAG1] == ELFMAG1) | |
824 | && (x_ehdrp->e_ident[EI_MAG2] == ELFMAG2) | |
825 | && (x_ehdrp->e_ident[EI_MAG3] == ELFMAG3)); | |
826 | } | |
244ffee7 | 827 | |
d24928c0 KR |
828 | /* Check to see if the file associated with ABFD matches the target vector |
829 | that ABFD points to. | |
830 | ||
831 | Note that we may be called several times with the same ABFD, but different | |
832 | target vectors, most of which will not match. We have to avoid leaving | |
833 | any side effects in ABFD, or any data it points to (like tdata), if the | |
834 | file does not match the target vector. | |
835 | ||
836 | FIXME: There is memory leak if we are called more than once with the same | |
837 | ABFD, and that bfd already has tdata allocated, since we allocate more tdata | |
838 | and the old tdata is orphaned. Since it's in the bfd obstack, there isn't | |
01383fb4 | 839 | much we can do about this except possibly rewrite the code. There are |
d24928c0 KR |
840 | also other bfd_allocs that may be the source of memory leaks as well. */ |
841 | ||
32090b8e KR |
842 | bfd_target * |
843 | DEFUN (elf_object_p, (abfd), bfd * abfd) | |
244ffee7 | 844 | { |
32090b8e KR |
845 | Elf_External_Ehdr x_ehdr; /* Elf file header, external form */ |
846 | Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */ | |
847 | Elf_External_Shdr x_shdr; /* Section header table entry, external form */ | |
848 | Elf_Internal_Shdr *i_shdrp; /* Section header table, internal form */ | |
849 | int shindex; | |
850 | char *shstrtab; /* Internal copy of section header stringtab */ | |
062189c6 | 851 | struct elf_backend_data *ebd; |
d24928c0 | 852 | struct elf_obj_tdata *preserved_tdata = elf_tdata (abfd); |
244ffee7 | 853 | |
32090b8e KR |
854 | /* Read in the ELF header in external format. */ |
855 | ||
856 | if (bfd_read ((PTR) & x_ehdr, sizeof (x_ehdr), 1, abfd) != sizeof (x_ehdr)) | |
d1ad85a6 | 857 | goto got_system_call; |
244ffee7 | 858 | |
32090b8e KR |
859 | /* Now check to see if we have a valid ELF file, and one that BFD can |
860 | make use of. The magic number must match, the address size ('class') | |
861 | and byte-swapping must match our XVEC entry, and it must have a | |
862 | section header table (FIXME: See comments re sections at top of this | |
863 | file). */ | |
244ffee7 | 864 | |
d24928c0 KR |
865 | if ((elf_file_p (&x_ehdr) == false) || |
866 | (x_ehdr.e_ident[EI_VERSION] != EV_CURRENT) || | |
867 | (x_ehdr.e_ident[EI_CLASS] != ELFCLASS)) | |
868 | goto got_wrong_format_error; | |
244ffee7 | 869 | |
d24928c0 | 870 | /* Check that file's byte order matches xvec's */ |
32090b8e | 871 | switch (x_ehdr.e_ident[EI_DATA]) |
244ffee7 | 872 | { |
32090b8e KR |
873 | case ELFDATA2MSB: /* Big-endian */ |
874 | if (!abfd->xvec->header_byteorder_big_p) | |
d24928c0 | 875 | goto got_wrong_format_error; |
32090b8e KR |
876 | break; |
877 | case ELFDATA2LSB: /* Little-endian */ | |
878 | if (abfd->xvec->header_byteorder_big_p) | |
d24928c0 | 879 | goto got_wrong_format_error; |
32090b8e KR |
880 | break; |
881 | case ELFDATANONE: /* No data encoding specified */ | |
882 | default: /* Unknown data encoding specified */ | |
d24928c0 | 883 | goto got_wrong_format_error; |
244ffee7 | 884 | } |
244ffee7 | 885 | |
32090b8e | 886 | /* Allocate an instance of the elf_obj_tdata structure and hook it up to |
d24928c0 | 887 | the tdata pointer in the bfd. FIXME: memory leak, see above. */ |
244ffee7 | 888 | |
d24928c0 KR |
889 | elf_tdata (abfd) = |
890 | (struct elf_obj_tdata *) bfd_zalloc (abfd, sizeof (struct elf_obj_tdata)); | |
891 | if (elf_tdata (abfd) == NULL) | |
892 | goto got_no_memory_error; | |
244ffee7 | 893 | |
32090b8e KR |
894 | /* Now that we know the byte order, swap in the rest of the header */ |
895 | i_ehdrp = elf_elfheader (abfd); | |
896 | elf_swap_ehdr_in (abfd, &x_ehdr, i_ehdrp); | |
897 | #if DEBUG & 1 | |
898 | elf_debug_file (i_ehdrp); | |
244ffee7 JK |
899 | #endif |
900 | ||
32090b8e KR |
901 | /* If there is no section header table, we're hosed. */ |
902 | if (i_ehdrp->e_shoff == 0) | |
d24928c0 | 903 | goto got_wrong_format_error; |
244ffee7 | 904 | |
062189c6 ILT |
905 | /* As a simple sanity check, verify that the what BFD thinks is the |
906 | size of each section header table entry actually matches the size | |
907 | recorded in the file. */ | |
908 | if (i_ehdrp->e_shentsize != sizeof (x_shdr)) | |
909 | goto got_wrong_format_error; | |
910 | ||
911 | ebd = get_elf_backend_data (abfd); | |
912 | ||
913 | /* Check that the ELF e_machine field matches what this particular | |
914 | BFD format expects. */ | |
915 | if (ebd->elf_machine_code != i_ehdrp->e_machine) | |
916 | { | |
917 | bfd_target **target_ptr; | |
918 | ||
919 | if (ebd->elf_machine_code != EM_NONE) | |
920 | goto got_wrong_format_error; | |
921 | ||
922 | /* This is the generic ELF target. Let it match any ELF target | |
923 | for which we do not have a specific backend. */ | |
f4bd7a8f | 924 | for (target_ptr = bfd_target_vector; *target_ptr != NULL; target_ptr++) |
062189c6 ILT |
925 | { |
926 | struct elf_backend_data *back; | |
927 | ||
928 | if ((*target_ptr)->flavour != bfd_target_elf_flavour) | |
929 | continue; | |
930 | back = (struct elf_backend_data *) (*target_ptr)->backend_data; | |
931 | if (back->elf_machine_code == i_ehdrp->e_machine) | |
932 | { | |
933 | /* target_ptr is an ELF backend which matches this | |
934 | object file, so reject the generic ELF target. */ | |
935 | goto got_wrong_format_error; | |
936 | } | |
937 | } | |
938 | } | |
939 | ||
940 | ||
941 | /* Set the flags and architecture before calling the backend so that | |
942 | it can override them. */ | |
7b8106b4 | 943 | if (i_ehdrp->e_type == ET_EXEC) |
32090b8e | 944 | abfd->flags |= EXEC_P; |
7b8106b4 ILT |
945 | else if (i_ehdrp->e_type == ET_DYN) |
946 | abfd->flags |= DYNAMIC; | |
244ffee7 | 947 | |
062189c6 | 948 | bfd_default_set_arch_mach (abfd, ebd->arch, 0); |
32090b8e | 949 | |
062189c6 ILT |
950 | /* Remember the entry point specified in the ELF file header. */ |
951 | bfd_get_start_address (abfd) = i_ehdrp->e_entry; | |
32090b8e | 952 | |
062189c6 ILT |
953 | /* Let the backend double check the format and override global |
954 | information. */ | |
955 | if (ebd->elf_backend_object_p) | |
956 | { | |
957 | if ((*ebd->elf_backend_object_p) (abfd) == false) | |
958 | goto got_wrong_format_error; | |
959 | } | |
960 | ||
32090b8e KR |
961 | /* Allocate space for a copy of the section header table in |
962 | internal form, seek to the section header table in the file, | |
062189c6 | 963 | read it in, and convert it to internal form. */ |
32090b8e KR |
964 | i_shdrp = (Elf_Internal_Shdr *) |
965 | bfd_alloc (abfd, sizeof (*i_shdrp) * i_ehdrp->e_shnum); | |
300adb31 KR |
966 | elf_elfsections (abfd) = |
967 | (Elf_Internal_Shdr **) bfd_alloc (abfd, sizeof (i_shdrp) * i_ehdrp->e_shnum); | |
32090b8e | 968 | if (!i_shdrp || !elf_elfsections(abfd)) |
d24928c0 | 969 | goto got_no_memory_error; |
32090b8e | 970 | if (bfd_seek (abfd, i_ehdrp->e_shoff, SEEK_SET) == -1) |
d1ad85a6 | 971 | goto got_system_call; |
32090b8e | 972 | for (shindex = 0; shindex < i_ehdrp->e_shnum; shindex++) |
244ffee7 | 973 | { |
d24928c0 | 974 | if (bfd_read ((PTR) & x_shdr, sizeof x_shdr, 1, abfd) != sizeof (x_shdr)) |
d1ad85a6 | 975 | goto got_system_call; |
32090b8e KR |
976 | elf_swap_shdr_in (abfd, &x_shdr, i_shdrp + shindex); |
977 | elf_elfsections(abfd)[shindex] = i_shdrp + shindex; | |
38a5f510 ILT |
978 | |
979 | /* If this is a .dynamic section, mark the object file as being | |
980 | dynamically linked. */ | |
981 | if (i_shdrp[shindex].sh_type == SHT_DYNAMIC) | |
982 | abfd->flags |= DYNAMIC; | |
244ffee7 | 983 | } |
32090b8e | 984 | if (i_ehdrp->e_shstrndx) |
244ffee7 | 985 | { |
32090b8e | 986 | bfd_section_from_shdr (abfd, i_ehdrp->e_shstrndx); |
244ffee7 JK |
987 | } |
988 | ||
32090b8e KR |
989 | #if 0 |
990 | for (shindex = i_ehdrp->e_shnum - 1; shindex >= 0; shindex--) | |
991 | { | |
992 | if (!strcmp (elf_string_from_elf_strtab (abfd, | |
993 | i_shdrp[shindex].sh_name), | |
994 | ".strtab")) | |
995 | { | |
996 | elf_tdata(abfd)->strtab_hdr = i_shdrp[shindex]; | |
997 | elf_elfsections(abfd)[shindex] = &elf_tdata(abfd)->strtab_hdr; | |
998 | } | |
999 | else if (!strcmp (elf_string_from_elf_strtab (abfd, | |
1000 | i_shdrp[shindex].sh_name), | |
1001 | ".symtab")) | |
1002 | { | |
1003 | elf_tdata(abfd)->symtab_hdr = i_shdrp[shindex]; | |
1004 | elf_elfsections(abfd)[shindex] = &elf_tdata(abfd)->symtab_hdr; | |
1005 | elf_onesymtab (abfd) = shindex; | |
1006 | } | |
1007 | } | |
1008 | #endif | |
244ffee7 | 1009 | |
32090b8e KR |
1010 | /* Read in the string table containing the names of the sections. We |
1011 | will need the base pointer to this table later. */ | |
1012 | /* We read this inline now, so that we don't have to go through | |
1013 | bfd_section_from_shdr with it (since this particular strtab is | |
1014 | used to find all of the ELF section names.) */ | |
244ffee7 | 1015 | |
32090b8e KR |
1016 | shstrtab = elf_get_str_section (abfd, i_ehdrp->e_shstrndx); |
1017 | if (!shstrtab) | |
d24928c0 | 1018 | goto got_wrong_format_error; |
244ffee7 | 1019 | |
32090b8e KR |
1020 | /* Once all of the section headers have been read and converted, we |
1021 | can start processing them. Note that the first section header is | |
1022 | a dummy placeholder entry, so we ignore it. | |
244ffee7 | 1023 | |
32090b8e KR |
1024 | We also watch for the symbol table section and remember the file |
1025 | offset and section size for both the symbol table section and the | |
1026 | associated string table section. */ | |
244ffee7 | 1027 | |
32090b8e KR |
1028 | for (shindex = 1; shindex < i_ehdrp->e_shnum; shindex++) |
1029 | { | |
1030 | bfd_section_from_shdr (abfd, shindex); | |
1031 | } | |
244ffee7 | 1032 | |
d24928c0 KR |
1033 | return (abfd->xvec); |
1034 | ||
1035 | /* If we are going to use goto's to avoid duplicating error setting | |
1036 | and return(NULL) code, then this at least makes it more maintainable. */ | |
1037 | ||
d1ad85a6 DM |
1038 | got_system_call: |
1039 | bfd_set_error (bfd_error_system_call); | |
d24928c0 KR |
1040 | goto got_no_match; |
1041 | got_wrong_format_error: | |
d1ad85a6 | 1042 | bfd_set_error (bfd_error_wrong_format); |
d24928c0 KR |
1043 | goto got_no_match; |
1044 | got_no_memory_error: | |
d1ad85a6 | 1045 | bfd_set_error (bfd_error_no_memory); |
d24928c0 KR |
1046 | goto got_no_match; |
1047 | got_no_match: | |
1048 | elf_tdata (abfd) = preserved_tdata; | |
1049 | return (NULL); | |
32090b8e | 1050 | } |
244ffee7 | 1051 | |
32090b8e KR |
1052 | \f |
1053 | /* ELF .o/exec file writing */ | |
1054 | ||
d24928c0 KR |
1055 | /* Takes a bfd and a symbol, returns a pointer to the elf specific area |
1056 | of the symbol if there is one. */ | |
32090b8e KR |
1057 | static INLINE elf_symbol_type * |
1058 | DEFUN (elf_symbol_from, (ignore_abfd, symbol), | |
1059 | bfd * ignore_abfd AND | |
1060 | asymbol * symbol) | |
244ffee7 | 1061 | { |
32090b8e KR |
1062 | if (symbol->the_bfd->xvec->flavour != bfd_target_elf_flavour) |
1063 | return 0; | |
1064 | ||
1065 | if (symbol->the_bfd->tdata.elf_obj_data == (struct elf_obj_tdata *) NULL) | |
1066 | return 0; | |
1067 | ||
1068 | return (elf_symbol_type *) symbol; | |
244ffee7 JK |
1069 | } |
1070 | ||
d24928c0 | 1071 | /* Create ELF output from BFD sections. |
244ffee7 | 1072 | |
d24928c0 KR |
1073 | Essentially, just create the section header and forget about the program |
1074 | header for now. */ | |
244ffee7 | 1075 | |
32090b8e KR |
1076 | static void |
1077 | DEFUN (elf_make_sections, (abfd, asect, obj), | |
1078 | bfd * abfd AND | |
1079 | asection * asect AND | |
1080 | PTR obj) | |
1081 | { | |
1082 | /* most of what is in bfd_shdr_from_section goes in here... */ | |
1083 | /* and all of these sections generate at *least* one ELF section. */ | |
32090b8e KR |
1084 | Elf_Internal_Shdr *this_hdr; |
1085 | this_hdr = &elf_section_data (asect)->this_hdr; | |
244ffee7 | 1086 | |
32090b8e KR |
1087 | this_hdr->sh_addr = asect->vma; |
1088 | this_hdr->sh_size = asect->_raw_size; | |
1089 | /* contents already set by elf_set_section_contents */ | |
244ffee7 | 1090 | |
300adb31 | 1091 | if (asect->flags & SEC_RELOC) |
244ffee7 | 1092 | { |
32090b8e KR |
1093 | /* emit a reloc section, and thus strtab and symtab... */ |
1094 | Elf_Internal_Shdr *rela_hdr; | |
32090b8e | 1095 | int use_rela_p = get_elf_backend_data (abfd)->use_rela_p; |
244ffee7 | 1096 | |
32090b8e | 1097 | rela_hdr = &elf_section_data (asect)->rel_hdr; |
244ffee7 | 1098 | |
32090b8e KR |
1099 | /* orelocation has the data, reloc_count has the count... */ |
1100 | if (use_rela_p) | |
1101 | { | |
1102 | rela_hdr->sh_type = SHT_RELA; | |
1103 | rela_hdr->sh_entsize = sizeof (Elf_External_Rela); | |
1104 | } | |
1105 | else | |
1106 | /* REL relocations */ | |
1107 | { | |
1108 | rela_hdr->sh_type = SHT_REL; | |
1109 | rela_hdr->sh_entsize = sizeof (Elf_External_Rel); | |
1110 | } | |
1111 | rela_hdr->sh_flags = 0; | |
1112 | rela_hdr->sh_addr = 0; | |
1113 | rela_hdr->sh_offset = 0; | |
062189c6 ILT |
1114 | |
1115 | /* FIXME: Systems I've checked use an alignment of 4, but it is | |
1116 | possible that some systems use a different alignment. */ | |
1117 | rela_hdr->sh_addralign = 4; | |
1118 | ||
32090b8e KR |
1119 | rela_hdr->size = 0; |
1120 | } | |
1121 | if (asect->flags & SEC_ALLOC) | |
244ffee7 | 1122 | { |
32090b8e KR |
1123 | this_hdr->sh_flags |= SHF_ALLOC; |
1124 | if (asect->flags & SEC_LOAD) | |
1125 | { | |
1126 | /* @@ Do something with sh_type? */ | |
1127 | } | |
244ffee7 | 1128 | } |
f035cc47 ILT |
1129 | else |
1130 | { | |
1131 | /* If this section is not part of the program image during | |
1132 | execution, leave the address fields at 0. */ | |
1133 | this_hdr->sh_addr = 0; | |
1134 | asect->vma = 0; | |
1135 | } | |
32090b8e KR |
1136 | if (!(asect->flags & SEC_READONLY)) |
1137 | this_hdr->sh_flags |= SHF_WRITE; | |
244ffee7 | 1138 | |
32090b8e KR |
1139 | if (asect->flags & SEC_CODE) |
1140 | this_hdr->sh_flags |= SHF_EXECINSTR; | |
1141 | } | |
244ffee7 | 1142 | |
32090b8e KR |
1143 | void |
1144 | write_relocs (abfd, sec, xxx) | |
1145 | bfd *abfd; | |
1146 | asection *sec; | |
1147 | PTR xxx; | |
1148 | { | |
1149 | Elf_Internal_Shdr *rela_hdr; | |
1150 | Elf_External_Rela *outbound_relocas; | |
1151 | Elf_External_Rel *outbound_relocs; | |
1152 | int idx; | |
1153 | int use_rela_p = get_elf_backend_data (abfd)->use_rela_p; | |
300adb31 | 1154 | asymbol *last_sym = 0; |
38a5f510 | 1155 | int last_sym_idx = 9999999; /* should always be written before use */ |
244ffee7 | 1156 | |
32090b8e KR |
1157 | if ((sec->flags & SEC_RELOC) == 0) |
1158 | return; | |
1159 | /* Flags are sometimes inconsistent. */ | |
1160 | if (sec->reloc_count == 0) | |
1161 | return; | |
244ffee7 | 1162 | |
32090b8e | 1163 | rela_hdr = &elf_section_data (sec)->rel_hdr; |
244ffee7 | 1164 | |
32090b8e KR |
1165 | rela_hdr->sh_size = rela_hdr->sh_entsize * sec->reloc_count; |
1166 | rela_hdr->contents = (void *) bfd_alloc (abfd, rela_hdr->sh_size); | |
9783e04a DM |
1167 | if (!rela_hdr->contents) |
1168 | { | |
d1ad85a6 | 1169 | bfd_set_error (bfd_error_no_memory); |
9783e04a DM |
1170 | abort(); /* FIXME */ |
1171 | } | |
244ffee7 | 1172 | |
32090b8e | 1173 | /* orelocation has the data, reloc_count has the count... */ |
300adb31 KR |
1174 | if (use_rela_p) |
1175 | { | |
1176 | outbound_relocas = (Elf_External_Rela *) rela_hdr->contents; | |
1177 | ||
1178 | for (idx = 0; idx < sec->reloc_count; idx++) | |
32090b8e | 1179 | { |
300adb31 KR |
1180 | Elf_Internal_Rela dst_rela; |
1181 | Elf_External_Rela *src_rela; | |
1182 | arelent *ptr; | |
1183 | asymbol *sym; | |
1184 | int n; | |
1185 | ||
1186 | ptr = sec->orelocation[idx]; | |
1187 | src_rela = outbound_relocas + idx; | |
1188 | if (!(abfd->flags & EXEC_P)) | |
1189 | dst_rela.r_offset = ptr->address - sec->vma; | |
1190 | else | |
1191 | dst_rela.r_offset = ptr->address; | |
6a3eb9b6 | 1192 | |
300adb31 KR |
1193 | sym = *ptr->sym_ptr_ptr; |
1194 | if (sym == last_sym) | |
1195 | n = last_sym_idx; | |
1196 | else | |
32090b8e | 1197 | { |
300adb31 KR |
1198 | last_sym = sym; |
1199 | last_sym_idx = n = elf_symbol_from_bfd_symbol (abfd, &sym); | |
32090b8e | 1200 | } |
300adb31 KR |
1201 | dst_rela.r_info = ELF_R_INFO (n, ptr->howto->type); |
1202 | ||
1203 | dst_rela.r_addend = ptr->addend; | |
1204 | elf_swap_reloca_out (abfd, &dst_rela, src_rela); | |
244ffee7 | 1205 | } |
300adb31 KR |
1206 | } |
1207 | else | |
1208 | /* REL relocations */ | |
1209 | { | |
1210 | outbound_relocs = (Elf_External_Rel *) rela_hdr->contents; | |
1211 | ||
1212 | for (idx = 0; idx < sec->reloc_count; idx++) | |
32090b8e | 1213 | { |
300adb31 KR |
1214 | Elf_Internal_Rel dst_rel; |
1215 | Elf_External_Rel *src_rel; | |
1216 | arelent *ptr; | |
1217 | int n; | |
1218 | asymbol *sym; | |
1219 | ||
1220 | ptr = sec->orelocation[idx]; | |
1221 | sym = *ptr->sym_ptr_ptr; | |
1222 | src_rel = outbound_relocs + idx; | |
1223 | if (!(abfd->flags & EXEC_P)) | |
1224 | dst_rel.r_offset = ptr->address - sec->vma; | |
1225 | else | |
1226 | dst_rel.r_offset = ptr->address; | |
244ffee7 | 1227 | |
300adb31 KR |
1228 | if (sym == last_sym) |
1229 | n = last_sym_idx; | |
1230 | else | |
32090b8e | 1231 | { |
300adb31 KR |
1232 | last_sym = sym; |
1233 | last_sym_idx = n = elf_symbol_from_bfd_symbol (abfd, &sym); | |
32090b8e | 1234 | } |
300adb31 KR |
1235 | dst_rel.r_info = ELF_R_INFO (n, ptr->howto->type); |
1236 | ||
1237 | elf_swap_reloc_out (abfd, &dst_rel, src_rel); | |
32090b8e | 1238 | } |
300adb31 | 1239 | } |
32090b8e | 1240 | } |
244ffee7 | 1241 | |
32090b8e KR |
1242 | static void |
1243 | fix_up_strtabs (abfd, asect, obj) | |
1244 | bfd *abfd; | |
1245 | asection *asect; | |
1246 | PTR obj; | |
1247 | { | |
1248 | Elf_Internal_Shdr *this_hdr = &elf_section_data (asect)->this_hdr; | |
1249 | int this_idx = elf_section_data(asect)->this_idx; | |
244ffee7 | 1250 | |
32090b8e KR |
1251 | /* @@ Check flags! */ |
1252 | if (!strncmp (asect->name, ".stab", 5) | |
1253 | && !strcmp ("str", asect->name + strlen (asect->name) - 3)) | |
1254 | { | |
1255 | size_t len = strlen (asect->name) + 1; | |
e74034d8 | 1256 | char *s = (char *) alloca (len); |
32090b8e KR |
1257 | strcpy (s, asect->name); |
1258 | s[len - 4] = 0; | |
1259 | asect = bfd_get_section_by_name (abfd, s); | |
1260 | if (!asect) | |
1261 | abort (); | |
1262 | elf_section_data(asect)->this_hdr.sh_link = this_idx; | |
32090b8e | 1263 | /* @@ Assuming 32 bits! */ |
01383fb4 KR |
1264 | elf_section_data(asect)->this_hdr.sh_entsize = 0xc; |
1265 | ||
1266 | this_hdr->sh_type = SHT_STRTAB; | |
244ffee7 | 1267 | } |
32090b8e | 1268 | } |
244ffee7 | 1269 | |
32090b8e KR |
1270 | static void |
1271 | DEFUN (elf_fake_sections, (abfd, asect, obj), | |
1272 | bfd * abfd AND | |
1273 | asection * asect AND | |
1274 | PTR obj) | |
1275 | { | |
1276 | /* most of what is in bfd_shdr_from_section goes in here... */ | |
1277 | /* and all of these sections generate at *least* one ELF section. */ | |
244ffee7 | 1278 | |
32090b8e KR |
1279 | Elf_Internal_Shdr *this_hdr; |
1280 | this_hdr = &elf_section_data (asect)->this_hdr; | |
1281 | this_hdr->sh_name = | |
1282 | bfd_add_to_strtab (abfd, elf_shstrtab (abfd), asect->name); | |
1283 | /* We need to log the type *now* so that elf_section_from_bfd_section | |
1284 | can find us... have to set rawdata too. */ | |
1285 | this_hdr->rawdata = (void *) asect; | |
1286 | this_hdr->sh_addralign = 1 << asect->alignment_power; | |
1287 | if ((asect->flags & SEC_ALLOC) && (asect->flags & SEC_LOAD)) | |
1288 | this_hdr->sh_type = SHT_PROGBITS; | |
e621c5cc ILT |
1289 | else if ((asect->flags & SEC_ALLOC) && ((asect->flags & SEC_LOAD) == 0)) |
1290 | { | |
6c35a16d ILT |
1291 | BFD_ASSERT (strcmp (asect->name, ".bss") == 0 |
1292 | || strcmp (asect->name, ".sbss") == 0); | |
e621c5cc ILT |
1293 | this_hdr->sh_type = SHT_NOBITS; |
1294 | } | |
1295 | /* FIXME I am not sure how to detect a .note section from the flags | |
1296 | word of an `asection'. */ | |
1297 | else if (!strcmp (asect->name, ".note")) | |
1298 | this_hdr->sh_type = SHT_NOTE; | |
32090b8e | 1299 | else |
32090b8e KR |
1300 | this_hdr->sh_type = SHT_PROGBITS; |
1301 | ||
1302 | this_hdr->sh_flags = 0; | |
1303 | this_hdr->sh_addr = 0; | |
1304 | this_hdr->sh_size = 0; | |
1305 | this_hdr->sh_entsize = 0; | |
1306 | this_hdr->sh_info = 0; | |
1307 | this_hdr->sh_link = 0; | |
1308 | this_hdr->sh_offset = 0; | |
1309 | this_hdr->size = 0; | |
244ffee7 | 1310 | |
f035cc47 ILT |
1311 | /* Now, check for processor-specific section types. */ |
1312 | { | |
1313 | struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
1314 | ||
1315 | if (bed->elf_backend_fake_sections) | |
1316 | (*bed->elf_backend_fake_sections) (abfd, this_hdr, asect); | |
1317 | } | |
1318 | ||
32090b8e KR |
1319 | { |
1320 | /* Emit a strtab and symtab, and possibly a reloc section. */ | |
1321 | Elf_Internal_Shdr *rela_hdr; | |
244ffee7 | 1322 | |
32090b8e KR |
1323 | /* Note that only one symtab is used, so just remember it |
1324 | for now. */ | |
244ffee7 | 1325 | |
300adb31 | 1326 | if (asect->flags & SEC_RELOC) |
32090b8e KR |
1327 | { |
1328 | int use_rela_p = get_elf_backend_data (abfd)->use_rela_p; | |
244ffee7 | 1329 | |
32090b8e KR |
1330 | rela_hdr = &elf_section_data (asect)->rel_hdr; |
1331 | rela_hdr->sh_name = | |
1332 | bfd_add_2_to_strtab (abfd, elf_shstrtab (abfd), | |
1333 | use_rela_p ? ".rela" : ".rel", | |
1334 | asect->name); | |
1335 | rela_hdr->sh_type = use_rela_p ? SHT_RELA : SHT_REL; | |
1336 | rela_hdr->sh_entsize = (use_rela_p | |
1337 | ? sizeof (Elf_External_Rela) | |
1338 | : sizeof (Elf_External_Rel)); | |
1339 | ||
1340 | rela_hdr->sh_flags = 0; | |
1341 | rela_hdr->sh_addr = 0; | |
1342 | rela_hdr->sh_size = 0; | |
1343 | rela_hdr->sh_offset = 0; | |
062189c6 ILT |
1344 | |
1345 | /* FIXME: Systems I've checked use an alignment of 4, but some | |
1346 | systems may use a different alignment. */ | |
1347 | rela_hdr->sh_addralign = 4; | |
1348 | ||
32090b8e KR |
1349 | rela_hdr->size = 0; |
1350 | } | |
1351 | } | |
1352 | if (asect->flags & SEC_ALLOC) | |
1353 | { | |
1354 | this_hdr->sh_flags |= SHF_ALLOC; | |
1355 | if (asect->flags & SEC_LOAD) | |
1356 | { | |
1357 | /* @@ Do something with sh_type? */ | |
1358 | } | |
1359 | } | |
1360 | if (!(asect->flags & SEC_READONLY)) | |
1361 | this_hdr->sh_flags |= SHF_WRITE; | |
1362 | if (asect->flags & SEC_CODE) | |
1363 | this_hdr->sh_flags |= SHF_EXECINSTR; | |
244ffee7 JK |
1364 | } |
1365 | ||
32090b8e KR |
1366 | /* Map symbol from it's internal number to the external number, moving |
1367 | all local symbols to be at the head of the list. */ | |
244ffee7 | 1368 | |
32090b8e | 1369 | static INLINE int |
062189c6 ILT |
1370 | sym_is_global (abfd, sym) |
1371 | bfd *abfd; | |
32090b8e KR |
1372 | asymbol *sym; |
1373 | { | |
062189c6 ILT |
1374 | /* If the backend has a special mapping, use it. */ |
1375 | if (get_elf_backend_data (abfd)->elf_backend_sym_is_global) | |
1376 | return ((*get_elf_backend_data (abfd)->elf_backend_sym_is_global) | |
1377 | (abfd, sym)); | |
1378 | ||
d24928c0 | 1379 | if (sym->flags & (BSF_GLOBAL | BSF_WEAK)) |
244ffee7 | 1380 | { |
32090b8e KR |
1381 | if (sym->flags & BSF_LOCAL) |
1382 | abort (); | |
1383 | return 1; | |
244ffee7 | 1384 | } |
d24928c0 KR |
1385 | if (sym->section == 0) |
1386 | { | |
1387 | /* Is this valid? */ | |
1388 | abort (); | |
1389 | ||
1390 | return 1; | |
1391 | } | |
32090b8e KR |
1392 | if (sym->section == &bfd_und_section) |
1393 | return 1; | |
1394 | if (bfd_is_com_section (sym->section)) | |
1395 | return 1; | |
1396 | if (sym->flags & (BSF_LOCAL | BSF_SECTION_SYM | BSF_FILE)) | |
1397 | return 0; | |
1398 | return 0; | |
1399 | } | |
244ffee7 | 1400 | |
9783e04a | 1401 | static boolean |
32090b8e KR |
1402 | DEFUN (elf_map_symbols, (abfd), bfd * abfd) |
1403 | { | |
1404 | int symcount = bfd_get_symcount (abfd); | |
1405 | asymbol **syms = bfd_get_outsymbols (abfd); | |
d24928c0 | 1406 | asymbol **sect_syms; |
32090b8e KR |
1407 | int num_locals = 0; |
1408 | int num_globals = 0; | |
1409 | int num_locals2 = 0; | |
1410 | int num_globals2 = 0; | |
d24928c0 | 1411 | int max_index = 0; |
32090b8e | 1412 | int num_sections = 0; |
d24928c0 | 1413 | Elf_Sym_Extra *sym_extra; |
32090b8e KR |
1414 | int idx; |
1415 | asection *asect; | |
6a3eb9b6 | 1416 | |
32090b8e KR |
1417 | #ifdef DEBUG |
1418 | fprintf (stderr, "elf_map_symbols\n"); | |
1419 | fflush (stderr); | |
1420 | #endif | |
244ffee7 | 1421 | |
e621c5cc ILT |
1422 | /* Add local symbols for each section for which there are relocs. |
1423 | FIXME: How can we tell which sections have relocs at this point? | |
1424 | Will reloc_count always be accurate? Actually, I think most ELF | |
1425 | targets create section symbols for all sections anyhow. */ | |
32090b8e | 1426 | for (asect = abfd->sections; asect; asect = asect->next) |
244ffee7 | 1427 | { |
d24928c0 KR |
1428 | if (max_index < asect->index) |
1429 | max_index = asect->index; | |
244ffee7 JK |
1430 | } |
1431 | ||
d24928c0 KR |
1432 | max_index++; |
1433 | elf_num_section_syms (abfd) = max_index; | |
1434 | sect_syms = (asymbol **) bfd_zalloc (abfd, max_index * sizeof (asymbol *)); | |
1435 | elf_section_syms (abfd) = sect_syms; | |
1436 | ||
5e829a34 | 1437 | if (sect_syms == 0) |
9783e04a | 1438 | { |
d1ad85a6 | 1439 | bfd_set_error (bfd_error_no_memory); |
9783e04a DM |
1440 | return false; |
1441 | } | |
d24928c0 KR |
1442 | |
1443 | for (asect = abfd->sections; asect; asect = asect->next) | |
e621c5cc ILT |
1444 | { |
1445 | asymbol *sym = bfd_make_empty_symbol (abfd); | |
9783e04a DM |
1446 | if (!sym) |
1447 | { | |
d1ad85a6 | 1448 | bfd_set_error (bfd_error_no_memory); |
9783e04a DM |
1449 | return false; |
1450 | } | |
e621c5cc ILT |
1451 | sym->the_bfd = abfd; |
1452 | sym->name = asect->name; | |
1453 | sym->value = asect->vma; | |
1454 | sym->flags = BSF_SECTION_SYM; | |
1455 | sym->section = asect; | |
1456 | sect_syms[asect->index] = sym; | |
1457 | num_sections++; | |
d24928c0 | 1458 | #ifdef DEBUG |
e621c5cc ILT |
1459 | fprintf (stderr, |
1460 | "creating section symbol, name = %s, value = 0x%.8lx, index = %d, section = 0x%.8lx\n", | |
1461 | asect->name, (long) asect->vma, asect->index, (long) asect); | |
d24928c0 | 1462 | #endif |
e621c5cc | 1463 | } |
d24928c0 | 1464 | |
32090b8e | 1465 | if (num_sections) |
244ffee7 | 1466 | { |
32090b8e KR |
1467 | if (syms) |
1468 | syms = (asymbol **) bfd_realloc (abfd, syms, | |
1469 | ((symcount + num_sections + 1) | |
1470 | * sizeof (asymbol *))); | |
1471 | else | |
1472 | syms = (asymbol **) bfd_alloc (abfd, | |
1473 | (num_sections + 1) * sizeof (asymbol *)); | |
9783e04a DM |
1474 | if (!syms) |
1475 | { | |
d1ad85a6 | 1476 | bfd_set_error (bfd_error_no_memory); |
9783e04a DM |
1477 | return false; |
1478 | } | |
244ffee7 | 1479 | |
32090b8e KR |
1480 | for (asect = abfd->sections; asect; asect = asect->next) |
1481 | { | |
d24928c0 KR |
1482 | if (sect_syms[asect->index]) |
1483 | syms[symcount++] = sect_syms[asect->index]; | |
32090b8e | 1484 | } |
244ffee7 | 1485 | |
32090b8e KR |
1486 | syms[symcount] = (asymbol *) 0; |
1487 | bfd_set_symtab (abfd, syms, symcount); | |
1488 | } | |
244ffee7 | 1489 | |
d24928c0 KR |
1490 | elf_sym_extra (abfd) = sym_extra |
1491 | = (Elf_Sym_Extra *) bfd_alloc (abfd, symcount * sizeof (Elf_Sym_Extra)); | |
9783e04a DM |
1492 | if (!sym_extra) |
1493 | { | |
d1ad85a6 | 1494 | bfd_set_error (bfd_error_no_memory); |
9783e04a DM |
1495 | return false; |
1496 | } | |
244ffee7 | 1497 | |
32090b8e KR |
1498 | /* Identify and classify all of the symbols. */ |
1499 | for (idx = 0; idx < symcount; idx++) | |
244ffee7 | 1500 | { |
062189c6 | 1501 | if (!sym_is_global (abfd, syms[idx])) |
32090b8e KR |
1502 | num_locals++; |
1503 | else | |
1504 | num_globals++; | |
244ffee7 | 1505 | } |
32090b8e KR |
1506 | |
1507 | /* Now provide mapping information. Add +1 for skipping over the | |
1508 | dummy symbol. */ | |
1509 | for (idx = 0; idx < symcount; idx++) | |
244ffee7 | 1510 | { |
d24928c0 | 1511 | syms[idx]->udata = (PTR) &sym_extra[idx]; |
062189c6 | 1512 | if (!sym_is_global (abfd, syms[idx])) |
d24928c0 | 1513 | sym_extra[idx].elf_sym_num = 1 + num_locals2++; |
32090b8e | 1514 | else |
d24928c0 | 1515 | sym_extra[idx].elf_sym_num = 1 + num_locals + num_globals2++; |
244ffee7 JK |
1516 | } |
1517 | ||
32090b8e KR |
1518 | elf_num_locals (abfd) = num_locals; |
1519 | elf_num_globals (abfd) = num_globals; | |
9783e04a | 1520 | return true; |
32090b8e | 1521 | } |
244ffee7 | 1522 | |
9783e04a DM |
1523 | static boolean assign_section_numbers (); |
1524 | static boolean assign_file_positions_except_relocs (); | |
244ffee7 | 1525 | |
32090b8e KR |
1526 | static boolean |
1527 | DEFUN (elf_compute_section_file_positions, (abfd), bfd * abfd) | |
1528 | { | |
32090b8e | 1529 | bfd_map_over_sections (abfd, elf_fake_sections, 0); |
244ffee7 | 1530 | |
9783e04a DM |
1531 | if (!assign_section_numbers (abfd)) |
1532 | return false; | |
244ffee7 | 1533 | |
32090b8e | 1534 | bfd_map_over_sections (abfd, elf_make_sections, 0); |
244ffee7 | 1535 | |
32090b8e | 1536 | bfd_map_over_sections (abfd, fix_up_strtabs, 0); /* .stab/.stabstr &c */ |
244ffee7 | 1537 | |
b9d5cdf0 DM |
1538 | if (swap_out_syms (abfd) == false) |
1539 | return false; | |
244ffee7 | 1540 | |
9783e04a DM |
1541 | if (!assign_file_positions_except_relocs (abfd)) |
1542 | return false; | |
32090b8e KR |
1543 | |
1544 | return true; | |
1545 | } | |
1546 | ||
1547 | static boolean | |
1548 | DEFUN (elf_write_phdrs, (abfd, i_ehdrp, i_phdrp, phdr_cnt), | |
1549 | bfd * abfd AND | |
1550 | Elf_Internal_Ehdr * i_ehdrp AND | |
1551 | Elf_Internal_Phdr * i_phdrp AND | |
1552 | Elf32_Half phdr_cnt) | |
244ffee7 | 1553 | { |
32090b8e | 1554 | /* first program header entry goes after the file header */ |
300adb31 | 1555 | int outbase = i_ehdrp->e_phoff; |
244ffee7 | 1556 | int i; |
32090b8e KR |
1557 | Elf_External_Phdr x_phdr; |
1558 | ||
1559 | for (i = 0; i < phdr_cnt; i++) | |
244ffee7 | 1560 | { |
32090b8e KR |
1561 | elf_swap_phdr_out (abfd, i_phdrp + i, &x_phdr); |
1562 | bfd_seek (abfd, outbase, SEEK_SET); | |
1563 | bfd_write ((PTR) & x_phdr, sizeof (x_phdr), 1, abfd); | |
1564 | outbase += sizeof (x_phdr); | |
244ffee7 | 1565 | } |
32090b8e KR |
1566 | |
1567 | return true; | |
244ffee7 JK |
1568 | } |
1569 | ||
32090b8e KR |
1570 | static const Elf_Internal_Shdr null_shdr; |
1571 | ||
1572 | /* Assign all ELF section numbers. The dummy first section is handled here | |
1573 | too. The link/info pointers for the standard section types are filled | |
1574 | in here too, while we're at it. (Link pointers for .stab sections are | |
1575 | not filled in here.) */ | |
9783e04a | 1576 | static boolean |
32090b8e | 1577 | assign_section_numbers (abfd) |
fce36137 | 1578 | bfd *abfd; |
fce36137 | 1579 | { |
32090b8e KR |
1580 | struct elf_obj_tdata *t = elf_tdata (abfd); |
1581 | asection *sec; | |
1582 | int section_number = 1; | |
1583 | int i; | |
1584 | Elf_Internal_Shdr **i_shdrp; | |
244ffee7 | 1585 | |
32090b8e KR |
1586 | t->shstrtab_hdr.sh_size = elf_shstrtab(abfd)->length; |
1587 | t->shstrtab_hdr.contents = (void *) elf_shstrtab(abfd)->tab; | |
1588 | shstrtab_length_fixed = 1; | |
244ffee7 | 1589 | |
32090b8e KR |
1590 | t->shstrtab_section = section_number++; |
1591 | elf_elfheader(abfd)->e_shstrndx = t->shstrtab_section; | |
1592 | if (abfd->symcount) | |
1593 | { | |
1594 | t->symtab_section = section_number++; | |
1595 | t->strtab_section = section_number++; | |
1596 | t->symtab_hdr.sh_link = t->strtab_section; | |
1597 | } | |
1598 | for (sec = abfd->sections; sec; sec = sec->next) | |
1599 | { | |
1600 | struct bfd_elf_section_data *d = elf_section_data (sec); | |
1601 | d->this_idx = section_number++; | |
300adb31 | 1602 | if (sec->flags & SEC_RELOC) |
fce36137 | 1603 | { |
32090b8e KR |
1604 | d->rel_idx = section_number++; |
1605 | d->rel_hdr.sh_link = t->symtab_section; | |
1606 | d->rel_hdr.sh_info = d->this_idx; | |
244ffee7 | 1607 | } |
fce36137 | 1608 | else |
32090b8e KR |
1609 | d->rel_idx = 0; |
1610 | /* No handling for per-section string tables currently. */ | |
1611 | } | |
1612 | elf_elfheader(abfd)->e_shnum = section_number; | |
1613 | ||
1614 | /* Set up the list of section header pointers, in agreement with the | |
1615 | indices. */ | |
300adb31 KR |
1616 | i_shdrp = (Elf_Internal_Shdr **) |
1617 | bfd_alloc (abfd, section_number * sizeof (Elf_Internal_Shdr *)); | |
9783e04a DM |
1618 | if (!i_shdrp) |
1619 | { | |
d1ad85a6 | 1620 | bfd_set_error (bfd_error_no_memory); |
9783e04a DM |
1621 | return false; |
1622 | } | |
32090b8e KR |
1623 | elf_elfsections(abfd) = i_shdrp; |
1624 | for (i = 0; i < section_number; i++) | |
1625 | i_shdrp[i] = 0; | |
1626 | ||
1627 | i_shdrp[0] = (Elf_Internal_Shdr *) &null_shdr; | |
1628 | i_shdrp[t->shstrtab_section] = &t->shstrtab_hdr; | |
1629 | if (abfd->symcount) | |
1630 | { | |
1631 | i_shdrp[t->symtab_section] = &t->symtab_hdr; | |
1632 | i_shdrp[t->strtab_section] = &t->strtab_hdr; | |
244ffee7 | 1633 | } |
32090b8e KR |
1634 | for (sec = abfd->sections; sec; sec = sec->next) |
1635 | { | |
1636 | struct bfd_elf_section_data *d = elf_section_data (sec); | |
1637 | i_shdrp[d->this_idx] = &d->this_hdr; | |
1638 | if (d->rel_idx) | |
1639 | i_shdrp[d->rel_idx] = &d->rel_hdr; | |
1640 | } | |
1641 | /* Make sure we got everything.... */ | |
1642 | for (i = 0; i < section_number; i++) | |
1643 | if (i_shdrp[i] == 0) | |
1644 | abort (); | |
9783e04a | 1645 | return true; |
32090b8e KR |
1646 | } |
1647 | ||
1648 | static INLINE file_ptr | |
1649 | assign_file_position_for_section (i_shdrp, offset) | |
1650 | Elf_Internal_Shdr *i_shdrp; | |
1651 | file_ptr offset; | |
1652 | { | |
f035cc47 ILT |
1653 | int align; |
1654 | ||
1655 | if (i_shdrp->sh_addralign != 0) | |
1656 | align = i_shdrp->sh_addralign; | |
1657 | else | |
1658 | align = 1; | |
1659 | i_shdrp->sh_offset = offset = BFD_ALIGN (offset, align); | |
7b8106b4 ILT |
1660 | if (i_shdrp->rawdata != NULL) |
1661 | ((asection *) i_shdrp->rawdata)->filepos = offset; | |
300adb31 KR |
1662 | if (i_shdrp->sh_type != SHT_NOBITS) |
1663 | offset += i_shdrp->sh_size; | |
32090b8e | 1664 | return offset; |
244ffee7 JK |
1665 | } |
1666 | ||
01383fb4 KR |
1667 | static INLINE file_ptr |
1668 | align_file_position (off) | |
1669 | file_ptr off; | |
1670 | { | |
f035cc47 | 1671 | return (off + FILE_ALIGN - 1) & ~(FILE_ALIGN - 1); |
01383fb4 KR |
1672 | } |
1673 | ||
300adb31 KR |
1674 | static INLINE file_ptr |
1675 | assign_file_positions_for_symtab_and_strtabs (abfd, off) | |
1676 | bfd *abfd; | |
1677 | file_ptr off; | |
1678 | { | |
1679 | struct elf_obj_tdata *t = elf_tdata (abfd); | |
1680 | ||
01383fb4 | 1681 | off = align_file_position (off); |
300adb31 | 1682 | off = assign_file_position_for_section (&t->symtab_hdr, off); |
01383fb4 | 1683 | off = assign_file_position_for_section (&t->shstrtab_hdr, off); |
300adb31 KR |
1684 | off = assign_file_position_for_section (&t->strtab_hdr, off); |
1685 | return off; | |
1686 | } | |
1687 | ||
1688 | struct seg_info { | |
1689 | bfd_vma low, mem_size; | |
1690 | file_ptr file_size; | |
1691 | int start_pos; | |
1692 | int sh_flags; | |
1693 | struct seg_info *next; | |
1694 | }; | |
1695 | ||
9783e04a | 1696 | static boolean |
300adb31 KR |
1697 | map_program_segments (abfd) |
1698 | bfd *abfd; | |
1699 | { | |
1700 | Elf_Internal_Shdr **i_shdrpp = elf_elfsections (abfd); | |
1701 | Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd); | |
1702 | Elf_Internal_Shdr *i_shdrp; | |
1703 | Elf_Internal_Phdr *phdr; | |
1704 | char *done; | |
1705 | int i, n_left = 0; | |
1706 | file_ptr lowest_offset = 0; | |
1707 | struct seg_info *seg = 0; | |
1708 | ||
e74034d8 | 1709 | done = (char *) alloca (i_ehdrp->e_shnum); |
300adb31 | 1710 | memset (done, 0, i_ehdrp->e_shnum); |
062189c6 | 1711 | for (i = 1; i < i_ehdrp->e_shnum; i++) |
300adb31 KR |
1712 | { |
1713 | i_shdrp = i_shdrpp[i]; | |
1714 | /* If it's going to be mapped in, it's been assigned a position. */ | |
1715 | if (i_shdrp->sh_offset + 1 == 0) | |
1716 | { | |
1717 | /* Well, not really, but we won't process it here. */ | |
1718 | done[i] = 1; | |
1719 | continue; | |
1720 | } | |
1721 | if (i_shdrp->sh_offset < lowest_offset | |
1722 | || lowest_offset == 0) | |
1723 | lowest_offset = i_shdrp->sh_offset; | |
1724 | /* Only interested in PROGBITS or NOBITS for generating segments. */ | |
1725 | switch (i_shdrp->sh_type) | |
1726 | { | |
1727 | case SHT_PROGBITS: | |
1728 | case SHT_NOBITS: | |
1729 | break; | |
1730 | default: | |
1731 | done[i] = 1; | |
1732 | } | |
1733 | if (!done[i]) | |
1734 | n_left++; | |
1735 | } | |
1736 | while (n_left) | |
1737 | { | |
1738 | bfd_vma lowest_vma = -1, high; | |
1739 | int low_sec = 0; | |
1740 | int mem_size; | |
1741 | int file_size = 0; | |
1742 | ||
1743 | for (i = 1; i < i_ehdrp->e_shnum; i++) | |
1744 | { | |
1745 | i_shdrp = i_shdrpp[i]; | |
1746 | if (!done[i] && i_shdrp->sh_addr < lowest_vma) | |
1747 | { | |
1748 | lowest_vma = i_shdrp->sh_addr; | |
1749 | low_sec = i; | |
1750 | } | |
1751 | } | |
1752 | if (low_sec == 0) | |
1753 | abort (); | |
1754 | /* So now we know the lowest vma of any unassigned sections; start | |
1755 | a segment there. */ | |
1756 | { | |
1757 | struct seg_info *s; | |
1758 | s = (struct seg_info *) bfd_alloc (abfd, sizeof (struct seg_info)); | |
9783e04a DM |
1759 | if (!s) |
1760 | { | |
d1ad85a6 | 1761 | bfd_set_error (bfd_error_no_memory); |
9783e04a DM |
1762 | return false; |
1763 | } | |
300adb31 KR |
1764 | s->next = seg; |
1765 | seg = s; | |
1766 | } | |
1767 | seg->low = lowest_vma; | |
1768 | i_shdrp = i_shdrpp[low_sec]; | |
1769 | seg->start_pos = i_shdrp->sh_offset; | |
1770 | seg->sh_flags = i_shdrp->sh_flags; | |
1771 | done[low_sec] = 1, n_left--; | |
1772 | mem_size = i_shdrp->sh_size; | |
1773 | high = lowest_vma + i_shdrp->sh_size; | |
1774 | ||
1775 | if (i_shdrp->sh_type == SHT_PROGBITS) | |
1776 | file_size = i_shdrp->sh_size; | |
1777 | ||
062189c6 | 1778 | for (i = 1; i < i_ehdrp->e_shnum; i++) |
300adb31 KR |
1779 | { |
1780 | file_ptr f1; | |
1781 | ||
300adb31 KR |
1782 | if (done[i]) |
1783 | continue; | |
1784 | i_shdrp = i_shdrpp[i]; | |
1785 | /* position of next byte on disk */ | |
1786 | f1 = seg->start_pos + file_size; | |
1787 | if (i_shdrp->sh_type == SHT_PROGBITS) | |
1788 | { | |
1789 | if (i_shdrp->sh_offset - f1 != i_shdrp->sh_addr - high) | |
1790 | continue; | |
6c35a16d ILT |
1791 | if (file_size != mem_size) |
1792 | break; | |
300adb31 KR |
1793 | } |
1794 | else /* sh_type == NOBITS */ | |
1795 | { | |
1796 | /* If the section in question has no contents in the disk | |
1797 | file, we really don't care where it supposedly starts. | |
1798 | But we don't want to bother merging it into this segment | |
1799 | if it doesn't start on this memory page. */ | |
1800 | bfd_vma page1, page2; | |
1801 | bfd_vma maxpagesize = get_elf_backend_data (abfd)->maxpagesize; | |
1802 | ||
1803 | /* page number in address space of current end of seg */ | |
1804 | page1 = (high - 1 + maxpagesize - 1) / maxpagesize; | |
1805 | /* page number in address space of start of this section */ | |
1806 | page2 = (i_shdrp->sh_addr + maxpagesize - 1) / maxpagesize; | |
1807 | ||
1808 | if (page1 != page2) | |
1809 | continue; | |
1810 | } | |
1811 | done[i] = 1, n_left--; | |
1812 | if (i_shdrp->sh_type == SHT_PROGBITS) | |
1813 | file_size = i_shdrp->sh_offset + i_shdrp->sh_size - seg->start_pos; | |
1814 | mem_size = i_shdrp->sh_addr + i_shdrp->sh_size - seg->low; | |
1815 | high = i_shdrp->sh_addr + i_shdrp->sh_size; | |
1816 | i = 0; | |
1817 | } | |
1818 | seg->file_size = file_size; | |
1819 | seg->mem_size = mem_size; | |
1820 | } | |
1821 | /* Now do something with the list of segments we've built up. */ | |
1822 | { | |
1823 | bfd_vma maxpagesize = get_elf_backend_data (abfd)->maxpagesize; | |
1824 | struct seg_info *s; | |
1825 | int n_segs = 0; | |
1826 | int sz; | |
1827 | ||
1828 | for (s = seg; s; s = s->next) | |
1829 | { | |
1830 | n_segs++; | |
1831 | } | |
1832 | i_ehdrp->e_phentsize = sizeof (Elf_External_Phdr); | |
1833 | sz = sizeof (Elf_External_Phdr) * n_segs; | |
01383fb4 KR |
1834 | if (align_file_position (i_ehdrp->e_ehsize) + sz <= lowest_offset) |
1835 | i_ehdrp->e_phoff = align_file_position (i_ehdrp->e_ehsize); | |
300adb31 KR |
1836 | else |
1837 | { | |
01383fb4 KR |
1838 | i_ehdrp->e_phoff = align_file_position (elf_tdata (abfd)->next_file_pos); |
1839 | elf_tdata (abfd)->next_file_pos = i_ehdrp->e_phoff + sz; | |
300adb31 | 1840 | } |
e74034d8 KR |
1841 | phdr = (Elf_Internal_Phdr*) bfd_alloc (abfd, |
1842 | n_segs * sizeof (Elf_Internal_Phdr)); | |
9783e04a DM |
1843 | if (!phdr) |
1844 | { | |
d1ad85a6 | 1845 | bfd_set_error (bfd_error_no_memory); |
9783e04a DM |
1846 | abort(); /* FIXME */ |
1847 | } | |
300adb31 KR |
1848 | elf_tdata (abfd)->phdr = phdr; |
1849 | while (seg) | |
1850 | { | |
1851 | phdr->p_type = PT_LOAD; /* only type we really support so far */ | |
1852 | phdr->p_offset = seg->start_pos; | |
1853 | phdr->p_vaddr = seg->low; | |
1854 | phdr->p_paddr = 0; | |
1855 | phdr->p_filesz = seg->file_size; | |
1856 | phdr->p_memsz = seg->mem_size; | |
1857 | phdr->p_flags = PF_R; | |
1858 | phdr->p_align = maxpagesize; /* ? */ | |
1859 | if (seg->sh_flags & SHF_WRITE) | |
e621c5cc ILT |
1860 | /* SysVr4 ELF docs say "data segments normally have read, write, |
1861 | and execute permissions." */ | |
1862 | phdr->p_flags |= (PF_W | PF_X); | |
300adb31 KR |
1863 | if (seg->sh_flags & SHF_EXECINSTR) |
1864 | phdr->p_flags |= PF_X; | |
1865 | phdr++; | |
1866 | seg = seg->next; | |
1867 | } | |
1868 | i_ehdrp->e_phnum = n_segs; | |
1869 | } | |
1870 | elf_write_phdrs (abfd, i_ehdrp, elf_tdata (abfd)->phdr, i_ehdrp->e_phnum); | |
9783e04a | 1871 | return true; |
300adb31 KR |
1872 | } |
1873 | ||
9783e04a | 1874 | static boolean |
32090b8e KR |
1875 | assign_file_positions_except_relocs (abfd) |
1876 | bfd *abfd; | |
244ffee7 | 1877 | { |
32090b8e KR |
1878 | /* For now, we ignore the possibility of having program segments, which |
1879 | may require some alignment in the file. That'll require padding, and | |
1880 | some interesting calculations to optimize file space usage. | |
244ffee7 | 1881 | |
32090b8e KR |
1882 | Also, since the application may change the list of relocations for |
1883 | a given section, we don't figure them in here. We'll put them at the | |
1884 | end of the file, at positions computed during bfd_close. | |
244ffee7 | 1885 | |
300adb31 KR |
1886 | The order, for now: <ehdr> <shdr> <sec1> <sec2> <sec3> ... <rel1> ... |
1887 | or: <ehdr> <phdr> <sec1> <sec2> ... <shdr> <rel1> ... */ | |
32090b8e | 1888 | |
062189c6 | 1889 | struct elf_obj_tdata *t = elf_tdata (abfd); |
32090b8e KR |
1890 | file_ptr off; |
1891 | int i; | |
1892 | Elf_Internal_Shdr **i_shdrpp = elf_elfsections (abfd); | |
1893 | Elf_Internal_Shdr *i_shdrp; | |
1894 | Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd); | |
300adb31 | 1895 | int exec_p = (abfd->flags & EXEC_P) != 0; |
6c35a16d | 1896 | bfd_vma maxpagesize = get_elf_backend_data (abfd)->maxpagesize; |
32090b8e | 1897 | |
300adb31 | 1898 | /* Everything starts after the ELF file header. */ |
32090b8e | 1899 | off = i_ehdrp->e_ehsize; |
300adb31 KR |
1900 | |
1901 | if (!exec_p) | |
1902 | { | |
1903 | /* Section headers. */ | |
01383fb4 | 1904 | off = align_file_position (off); |
300adb31 KR |
1905 | i_ehdrp->e_shoff = off; |
1906 | off += i_ehdrp->e_shnum * i_ehdrp->e_shentsize; | |
300adb31 KR |
1907 | off = assign_file_positions_for_symtab_and_strtabs (abfd, off); |
1908 | } | |
062189c6 | 1909 | for (i = 1; i < i_ehdrp->e_shnum; i++) |
32090b8e | 1910 | { |
062189c6 ILT |
1911 | /* The symtab and strtab sections are placed by |
1912 | assign_file_positions_for_symtab_and_strtabs. */ | |
1913 | if (i == t->symtab_section | |
1914 | || i == t->strtab_section | |
1915 | || i == t->shstrtab_section) | |
1916 | continue; | |
1917 | ||
32090b8e KR |
1918 | i_shdrp = i_shdrpp[i]; |
1919 | if (i_shdrp->sh_type == SHT_REL || i_shdrp->sh_type == SHT_RELA) | |
244ffee7 | 1920 | { |
32090b8e KR |
1921 | i_shdrp->sh_offset = -1; |
1922 | continue; | |
244ffee7 | 1923 | } |
300adb31 KR |
1924 | if (exec_p) |
1925 | { | |
300adb31 KR |
1926 | if (maxpagesize == 0) |
1927 | maxpagesize = 1; /* make the arithmetic work */ | |
1928 | /* This isn't necessarily going to give the best packing, if the | |
1929 | segments require padding between them, but since that isn't | |
1930 | usually the case, this'll do. */ | |
1931 | if ((i_shdrp->sh_flags & SHF_ALLOC) == 0) | |
1932 | { | |
1933 | i_shdrp->sh_offset = -1; | |
1934 | continue; | |
1935 | } | |
1936 | /* Blindly assume that the segments are ordered optimally. With | |
1937 | the default LD script, they will be. */ | |
6c35a16d | 1938 | if (i_shdrp->sh_type != SHT_NOBITS) |
300adb31 | 1939 | { |
6c35a16d ILT |
1940 | /* need big unsigned type */ |
1941 | bfd_vma addtl_off; | |
1942 | addtl_off = i_shdrp->sh_addr - off; | |
1943 | addtl_off = addtl_off % maxpagesize; | |
1944 | if (addtl_off) | |
1945 | { | |
1946 | off += addtl_off; | |
1947 | } | |
300adb31 KR |
1948 | } |
1949 | } | |
32090b8e | 1950 | off = assign_file_position_for_section (i_shdrp, off); |
01383fb4 | 1951 | |
6c35a16d ILT |
1952 | if (exec_p |
1953 | && i_shdrp->sh_type == SHT_NOBITS | |
1954 | && (i == i_ehdrp->e_shnum | |
1955 | || i_shdrpp[i + 1]->sh_type != SHT_NOBITS)) | |
1956 | { | |
1957 | /* Skip to the next page to ensure that when the file is | |
1958 | loaded the bss section is loaded with zeroes. I don't | |
1959 | know if this is required on all platforms, but it | |
1960 | shouldn't really hurt. */ | |
1961 | off = BFD_ALIGN (off, maxpagesize); | |
1962 | } | |
1963 | ||
300adb31 KR |
1964 | if (exec_p |
1965 | && get_elf_backend_data(abfd)->maxpagesize > 1 | |
1966 | && i_shdrp->sh_type == SHT_PROGBITS | |
1967 | && (i_shdrp->sh_flags & SHF_ALLOC) | |
01383fb4 | 1968 | && (i_shdrp->sh_offset - i_shdrp->sh_addr) % get_elf_backend_data (abfd)->maxpagesize != 0) |
300adb31 KR |
1969 | abort (); |
1970 | } | |
1971 | if (exec_p) | |
1972 | { | |
1973 | elf_tdata (abfd)->next_file_pos = off; | |
9783e04a DM |
1974 | if (!map_program_segments (abfd)) |
1975 | return false; | |
300adb31 KR |
1976 | off = elf_tdata (abfd)->next_file_pos; |
1977 | ||
1978 | /* Section headers. */ | |
01383fb4 | 1979 | off = align_file_position (off); |
300adb31 KR |
1980 | i_ehdrp->e_shoff = off; |
1981 | off += i_ehdrp->e_shnum * i_ehdrp->e_shentsize; | |
1982 | ||
1983 | off = assign_file_positions_for_symtab_and_strtabs (abfd, off); | |
1984 | ||
062189c6 | 1985 | for (i = 1; i < i_ehdrp->e_shnum; i++) |
300adb31 KR |
1986 | { |
1987 | i_shdrp = i_shdrpp[i]; | |
1988 | if (i_shdrp->sh_offset + 1 == 0 | |
1989 | && i_shdrp->sh_type != SHT_REL | |
1990 | && i_shdrp->sh_type != SHT_RELA) | |
1991 | off = assign_file_position_for_section (i_shdrp, off); | |
1992 | } | |
244ffee7 | 1993 | } |
32090b8e | 1994 | elf_tdata (abfd)->next_file_pos = off; |
9783e04a | 1995 | return true; |
244ffee7 JK |
1996 | } |
1997 | ||
32090b8e KR |
1998 | static boolean |
1999 | prep_headers (abfd) | |
2000 | bfd *abfd; | |
2001 | { | |
32090b8e KR |
2002 | Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */ |
2003 | Elf_Internal_Phdr *i_phdrp = 0; /* Program header table, internal form */ | |
32090b8e | 2004 | Elf_Internal_Shdr **i_shdrp; /* Section header table, internal form */ |
32090b8e | 2005 | int count; |
32090b8e | 2006 | struct strtab *shstrtab; |
244ffee7 | 2007 | |
32090b8e KR |
2008 | i_ehdrp = elf_elfheader (abfd); |
2009 | i_shdrp = elf_elfsections (abfd); | |
244ffee7 | 2010 | |
32090b8e | 2011 | shstrtab = bfd_new_strtab (abfd); |
b9d5cdf0 DM |
2012 | if (!shstrtab) |
2013 | return false; | |
2014 | ||
32090b8e | 2015 | elf_shstrtab (abfd) = shstrtab; |
244ffee7 | 2016 | |
32090b8e KR |
2017 | i_ehdrp->e_ident[EI_MAG0] = ELFMAG0; |
2018 | i_ehdrp->e_ident[EI_MAG1] = ELFMAG1; | |
2019 | i_ehdrp->e_ident[EI_MAG2] = ELFMAG2; | |
2020 | i_ehdrp->e_ident[EI_MAG3] = ELFMAG3; | |
244ffee7 | 2021 | |
32090b8e KR |
2022 | i_ehdrp->e_ident[EI_CLASS] = ELFCLASS; |
2023 | i_ehdrp->e_ident[EI_DATA] = | |
2024 | abfd->xvec->byteorder_big_p ? ELFDATA2MSB : ELFDATA2LSB; | |
2025 | i_ehdrp->e_ident[EI_VERSION] = EV_CURRENT; | |
244ffee7 | 2026 | |
32090b8e KR |
2027 | for (count = EI_PAD; count < EI_NIDENT; count++) |
2028 | i_ehdrp->e_ident[count] = 0; | |
244ffee7 | 2029 | |
32090b8e KR |
2030 | i_ehdrp->e_type = (abfd->flags & EXEC_P) ? ET_EXEC : ET_REL; |
2031 | switch (bfd_get_arch (abfd)) | |
fce36137 | 2032 | { |
32090b8e KR |
2033 | case bfd_arch_unknown: |
2034 | i_ehdrp->e_machine = EM_NONE; | |
2035 | break; | |
2036 | case bfd_arch_sparc: | |
2037 | i_ehdrp->e_machine = EM_SPARC; | |
2038 | /* start-sanitize-v9 */ | |
2039 | #if ARCH_SIZE == 64 | |
2040 | i_ehdrp->e_machine = EM_SPARC64; | |
2041 | #endif | |
2042 | /* end-sanitize-v9 */ | |
2043 | break; | |
2044 | case bfd_arch_i386: | |
2045 | i_ehdrp->e_machine = EM_386; | |
2046 | break; | |
2047 | case bfd_arch_m68k: | |
2048 | i_ehdrp->e_machine = EM_68K; | |
2049 | break; | |
2050 | case bfd_arch_m88k: | |
2051 | i_ehdrp->e_machine = EM_88K; | |
2052 | break; | |
2053 | case bfd_arch_i860: | |
2054 | i_ehdrp->e_machine = EM_860; | |
2055 | break; | |
2056 | case bfd_arch_mips: /* MIPS Rxxxx */ | |
2057 | i_ehdrp->e_machine = EM_MIPS; /* only MIPS R3000 */ | |
2058 | break; | |
2059 | case bfd_arch_hppa: | |
2060 | i_ehdrp->e_machine = EM_HPPA; | |
2061 | break; | |
2062 | /* also note that EM_M32, AT&T WE32100 is unknown to bfd */ | |
2063 | default: | |
2064 | i_ehdrp->e_machine = EM_NONE; | |
fce36137 | 2065 | } |
32090b8e KR |
2066 | i_ehdrp->e_version = EV_CURRENT; |
2067 | i_ehdrp->e_ehsize = sizeof (Elf_External_Ehdr); | |
244ffee7 | 2068 | |
32090b8e KR |
2069 | /* no program header, for now. */ |
2070 | i_ehdrp->e_phoff = 0; | |
2071 | i_ehdrp->e_phentsize = 0; | |
2072 | i_ehdrp->e_phnum = 0; | |
244ffee7 | 2073 | |
32090b8e KR |
2074 | /* each bfd section is section header entry */ |
2075 | i_ehdrp->e_entry = bfd_get_start_address (abfd); | |
2076 | i_ehdrp->e_shentsize = sizeof (Elf_External_Shdr); | |
244ffee7 | 2077 | |
32090b8e KR |
2078 | /* if we're building an executable, we'll need a program header table */ |
2079 | if (abfd->flags & EXEC_P) | |
244ffee7 | 2080 | { |
300adb31 | 2081 | /* it all happens later */ |
32090b8e KR |
2082 | #if 0 |
2083 | i_ehdrp->e_phentsize = sizeof (Elf_External_Phdr); | |
244ffee7 | 2084 | |
32090b8e KR |
2085 | /* elf_build_phdrs() returns a (NULL-terminated) array of |
2086 | Elf_Internal_Phdrs */ | |
2087 | i_phdrp = elf_build_phdrs (abfd, i_ehdrp, i_shdrp, &i_ehdrp->e_phnum); | |
2088 | i_ehdrp->e_phoff = outbase; | |
2089 | outbase += i_ehdrp->e_phentsize * i_ehdrp->e_phnum; | |
2090 | #endif | |
244ffee7 | 2091 | } |
32090b8e | 2092 | else |
244ffee7 | 2093 | { |
32090b8e KR |
2094 | i_ehdrp->e_phentsize = 0; |
2095 | i_phdrp = 0; | |
2096 | i_ehdrp->e_phoff = 0; | |
244ffee7 JK |
2097 | } |
2098 | ||
32090b8e KR |
2099 | elf_tdata (abfd)->symtab_hdr.sh_name = bfd_add_to_strtab (abfd, shstrtab, |
2100 | ".symtab"); | |
2101 | elf_tdata (abfd)->strtab_hdr.sh_name = bfd_add_to_strtab (abfd, shstrtab, | |
2102 | ".strtab"); | |
2103 | elf_tdata (abfd)->shstrtab_hdr.sh_name = bfd_add_to_strtab (abfd, shstrtab, | |
2104 | ".shstrtab"); | |
f035cc47 | 2105 | return true; |
244ffee7 JK |
2106 | } |
2107 | ||
b9d5cdf0 | 2108 | static boolean |
32090b8e KR |
2109 | swap_out_syms (abfd) |
2110 | bfd *abfd; | |
244ffee7 | 2111 | { |
9783e04a DM |
2112 | if (!elf_map_symbols (abfd)) |
2113 | return false; | |
244ffee7 | 2114 | |
32090b8e KR |
2115 | /* Dump out the symtabs. */ |
2116 | { | |
2117 | int symcount = bfd_get_symcount (abfd); | |
2118 | asymbol **syms = bfd_get_outsymbols (abfd); | |
2119 | struct strtab *stt = bfd_new_strtab (abfd); | |
2120 | Elf_Internal_Shdr *symtab_hdr; | |
2121 | Elf_Internal_Shdr *symstrtab_hdr; | |
2122 | Elf_External_Sym *outbound_syms; | |
2123 | int idx; | |
244ffee7 | 2124 | |
b9d5cdf0 DM |
2125 | if (!stt) |
2126 | return false; | |
32090b8e KR |
2127 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
2128 | symtab_hdr->sh_type = SHT_SYMTAB; | |
2129 | symtab_hdr->sh_entsize = sizeof (Elf_External_Sym); | |
2130 | symtab_hdr->sh_size = symtab_hdr->sh_entsize * (symcount + 1); | |
2131 | symtab_hdr->sh_info = elf_num_locals (abfd) + 1; | |
244ffee7 | 2132 | |
062189c6 ILT |
2133 | /* FIXME: Systems I've checked use 4 byte alignment for .symtab, |
2134 | but it is possible that there are systems which use a different | |
2135 | alignment. */ | |
2136 | symtab_hdr->sh_addralign = 4; | |
2137 | ||
32090b8e KR |
2138 | /* see assert in elf_fake_sections that supports this: */ |
2139 | symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr; | |
2140 | symstrtab_hdr->sh_type = SHT_STRTAB; | |
244ffee7 | 2141 | |
32090b8e KR |
2142 | outbound_syms = (Elf_External_Sym *) |
2143 | bfd_alloc (abfd, (1 + symcount) * sizeof (Elf_External_Sym)); | |
9783e04a DM |
2144 | if (!outbound_syms) |
2145 | { | |
d1ad85a6 | 2146 | bfd_set_error (bfd_error_no_memory); |
9783e04a DM |
2147 | return false; |
2148 | } | |
32090b8e KR |
2149 | /* now generate the data (for "contents") */ |
2150 | { | |
2151 | /* Fill in zeroth symbol and swap it out. */ | |
2152 | Elf_Internal_Sym sym; | |
2153 | sym.st_name = 0; | |
2154 | sym.st_value = 0; | |
2155 | sym.st_size = 0; | |
2156 | sym.st_info = 0; | |
2157 | sym.st_other = 0; | |
2158 | sym.st_shndx = SHN_UNDEF; | |
2159 | elf_swap_symbol_out (abfd, &sym, outbound_syms); | |
244ffee7 | 2160 | } |
32090b8e KR |
2161 | for (idx = 0; idx < symcount; idx++) |
2162 | { | |
2163 | Elf_Internal_Sym sym; | |
2164 | bfd_vma value = syms[idx]->value; | |
244ffee7 | 2165 | |
32090b8e KR |
2166 | if (syms[idx]->flags & BSF_SECTION_SYM) |
2167 | /* Section symbols have no names. */ | |
2168 | sym.st_name = 0; | |
2169 | else | |
2170 | sym.st_name = bfd_add_to_strtab (abfd, stt, syms[idx]->name); | |
244ffee7 | 2171 | |
32090b8e | 2172 | if (bfd_is_com_section (syms[idx]->section)) |
244ffee7 | 2173 | { |
32090b8e KR |
2174 | /* ELF common symbols put the alignment into the `value' field, |
2175 | and the size into the `size' field. This is backwards from | |
2176 | how BFD handles it, so reverse it here. */ | |
2177 | sym.st_size = value; | |
2178 | /* Should retrieve this from somewhere... */ | |
2179 | sym.st_value = 16; | |
d4fb8fce ILT |
2180 | sym.st_shndx = elf_section_from_bfd_section (abfd, |
2181 | syms[idx]->section); | |
244ffee7 JK |
2182 | } |
2183 | else | |
2184 | { | |
32090b8e | 2185 | asection *sec = syms[idx]->section; |
e74034d8 | 2186 | elf_symbol_type *type_ptr; |
32090b8e | 2187 | int shndx; |
244ffee7 | 2188 | |
32090b8e KR |
2189 | if (sec->output_section) |
2190 | { | |
2191 | value += sec->output_offset; | |
2192 | sec = sec->output_section; | |
2193 | } | |
2194 | value += sec->vma; | |
2195 | sym.st_value = value; | |
e74034d8 KR |
2196 | type_ptr = elf_symbol_from (abfd, syms[idx]); |
2197 | sym.st_size = type_ptr ? type_ptr->internal_elf_sym.st_size : 0; | |
32090b8e KR |
2198 | sym.st_shndx = shndx = elf_section_from_bfd_section (abfd, sec); |
2199 | if (shndx == -1) | |
2200 | { | |
2201 | asection *sec2; | |
2202 | /* Writing this would be a hell of a lot easier if we had | |
2203 | some decent documentation on bfd, and knew what to expect | |
2204 | of the library, and what to demand of applications. For | |
2205 | example, it appears that `objcopy' might not set the | |
2206 | section of a symbol to be a section that is actually in | |
2207 | the output file. */ | |
2208 | sec2 = bfd_get_section_by_name (abfd, sec->name); | |
2209 | assert (sec2 != 0); | |
2210 | sym.st_shndx = shndx = elf_section_from_bfd_section (abfd, sec2); | |
2211 | assert (shndx != -1); | |
2212 | } | |
2213 | } | |
244ffee7 | 2214 | |
32090b8e | 2215 | if (bfd_is_com_section (syms[idx]->section)) |
38a5f510 | 2216 | sym.st_info = ELF_ST_INFO (STB_GLOBAL, STT_OBJECT); |
32090b8e KR |
2217 | else if (syms[idx]->section == &bfd_und_section) |
2218 | sym.st_info = ELF_ST_INFO (STB_GLOBAL, STT_NOTYPE); | |
32090b8e KR |
2219 | else if (syms[idx]->flags & BSF_SECTION_SYM) |
2220 | sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION); | |
2221 | else if (syms[idx]->flags & BSF_FILE) | |
2222 | sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE); | |
d24928c0 | 2223 | else |
32090b8e | 2224 | { |
d24928c0 KR |
2225 | int bind = STB_LOCAL; |
2226 | int type = STT_OBJECT; | |
2227 | unsigned int flags = syms[idx]->flags; | |
2228 | ||
2229 | if (flags & BSF_LOCAL) | |
2230 | bind = STB_LOCAL; | |
2231 | else if (flags & BSF_WEAK) | |
2232 | bind = STB_WEAK; | |
2233 | else if (flags & BSF_GLOBAL) | |
2234 | bind = STB_GLOBAL; | |
2235 | ||
2236 | if (flags & BSF_FUNCTION) | |
2237 | type = STT_FUNC; | |
2238 | ||
2239 | sym.st_info = ELF_ST_INFO (bind, type); | |
32090b8e | 2240 | } |
244ffee7 | 2241 | |
32090b8e KR |
2242 | sym.st_other = 0; |
2243 | elf_swap_symbol_out (abfd, &sym, | |
d24928c0 KR |
2244 | (outbound_syms |
2245 | + elf_sym_extra (abfd)[idx].elf_sym_num)); | |
32090b8e KR |
2246 | } |
2247 | ||
2248 | symtab_hdr->contents = (PTR) outbound_syms; | |
2249 | symstrtab_hdr->contents = (PTR) stt->tab; | |
2250 | symstrtab_hdr->sh_size = stt->length; | |
2251 | symstrtab_hdr->sh_type = SHT_STRTAB; | |
2252 | ||
2253 | symstrtab_hdr->sh_flags = 0; | |
2254 | symstrtab_hdr->sh_addr = 0; | |
2255 | symstrtab_hdr->sh_entsize = 0; | |
2256 | symstrtab_hdr->sh_link = 0; | |
2257 | symstrtab_hdr->sh_info = 0; | |
062189c6 | 2258 | symstrtab_hdr->sh_addralign = 1; |
32090b8e KR |
2259 | symstrtab_hdr->size = 0; |
2260 | } | |
2261 | ||
2262 | /* put the strtab out too... */ | |
2263 | { | |
2264 | Elf_Internal_Shdr *this_hdr; | |
2265 | ||
2266 | this_hdr = &elf_tdata(abfd)->shstrtab_hdr; | |
2267 | this_hdr->contents = (PTR) elf_shstrtab (abfd)->tab; | |
2268 | this_hdr->sh_size = elf_shstrtab (abfd)->length; | |
2269 | this_hdr->sh_type = SHT_STRTAB; | |
2270 | this_hdr->sh_flags = 0; | |
2271 | this_hdr->sh_addr = 0; | |
2272 | this_hdr->sh_entsize = 0; | |
062189c6 | 2273 | this_hdr->sh_addralign = 1; |
32090b8e KR |
2274 | this_hdr->size = 0; |
2275 | } | |
b9d5cdf0 | 2276 | return true; |
244ffee7 JK |
2277 | } |
2278 | ||
32090b8e KR |
2279 | static boolean |
2280 | write_shdrs_and_ehdr (abfd) | |
2281 | bfd *abfd; | |
244ffee7 | 2282 | { |
32090b8e KR |
2283 | Elf_External_Ehdr x_ehdr; /* Elf file header, external form */ |
2284 | Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */ | |
32090b8e KR |
2285 | Elf_External_Shdr *x_shdrp; /* Section header table, external form */ |
2286 | Elf_Internal_Shdr **i_shdrp; /* Section header table, internal form */ | |
32090b8e | 2287 | int count; |
32090b8e | 2288 | struct strtab *shstrtab; |
244ffee7 | 2289 | |
32090b8e KR |
2290 | i_ehdrp = elf_elfheader (abfd); |
2291 | i_shdrp = elf_elfsections (abfd); | |
2292 | shstrtab = elf_shstrtab (abfd); | |
2293 | ||
2294 | /* swap the header before spitting it out... */ | |
2295 | ||
2296 | #if DEBUG & 1 | |
2297 | elf_debug_file (i_ehdrp); | |
244ffee7 | 2298 | #endif |
32090b8e KR |
2299 | elf_swap_ehdr_out (abfd, i_ehdrp, &x_ehdr); |
2300 | bfd_seek (abfd, (file_ptr) 0, SEEK_SET); | |
2301 | bfd_write ((PTR) & x_ehdr, sizeof (x_ehdr), 1, abfd); | |
244ffee7 | 2302 | |
32090b8e KR |
2303 | /* at this point we've concocted all the ELF sections... */ |
2304 | x_shdrp = (Elf_External_Shdr *) | |
2305 | bfd_alloc (abfd, sizeof (*x_shdrp) * (i_ehdrp->e_shnum)); | |
2306 | if (!x_shdrp) | |
2307 | { | |
d1ad85a6 | 2308 | bfd_set_error (bfd_error_no_memory); |
32090b8e KR |
2309 | return false; |
2310 | } | |
2311 | ||
2312 | for (count = 0; count < i_ehdrp->e_shnum; count++) | |
2313 | { | |
2314 | #if DEBUG & 2 | |
2315 | elf_debug_section (shstrtab->tab + i_shdrp[count]->sh_name, count, | |
2316 | i_shdrp[count]); | |
244ffee7 | 2317 | #endif |
32090b8e KR |
2318 | elf_swap_shdr_out (abfd, i_shdrp[count], x_shdrp + count); |
2319 | } | |
2320 | bfd_seek (abfd, (file_ptr) i_ehdrp->e_shoff, SEEK_SET); | |
2321 | bfd_write ((PTR) x_shdrp, sizeof (*x_shdrp), i_ehdrp->e_shnum, abfd); | |
2322 | /* need to dump the string table too... */ | |
244ffee7 | 2323 | |
32090b8e KR |
2324 | return true; |
2325 | } | |
244ffee7 | 2326 | |
32090b8e KR |
2327 | static void |
2328 | assign_file_positions_for_relocs (abfd) | |
2329 | bfd *abfd; | |
2330 | { | |
2331 | file_ptr off = elf_tdata(abfd)->next_file_pos; | |
2332 | int i; | |
2333 | Elf_Internal_Shdr **shdrpp = elf_elfsections (abfd); | |
2334 | Elf_Internal_Shdr *shdrp; | |
062189c6 | 2335 | for (i = 1; i < elf_elfheader(abfd)->e_shnum; i++) |
32090b8e KR |
2336 | { |
2337 | shdrp = shdrpp[i]; | |
2338 | if (shdrp->sh_type != SHT_REL && shdrp->sh_type != SHT_RELA) | |
2339 | continue; | |
01383fb4 | 2340 | off = align_file_position (off); |
32090b8e KR |
2341 | off = assign_file_position_for_section (shdrp, off); |
2342 | } | |
2343 | elf_tdata(abfd)->next_file_pos = off; | |
2344 | } | |
244ffee7 | 2345 | |
32090b8e KR |
2346 | boolean |
2347 | DEFUN (NAME(bfd_elf,write_object_contents), (abfd), bfd * abfd) | |
2348 | { | |
062189c6 | 2349 | struct elf_backend_data *bed = get_elf_backend_data (abfd); |
32090b8e KR |
2350 | Elf_Internal_Ehdr *i_ehdrp; |
2351 | Elf_Internal_Shdr **i_shdrp; | |
2352 | int count; | |
244ffee7 | 2353 | |
38a5f510 ILT |
2354 | /* We don't know how to write dynamic objects. Specifically, we |
2355 | don't know how to construct the program header. */ | |
2356 | if ((abfd->flags & DYNAMIC) != 0) | |
2357 | { | |
2358 | fprintf (stderr, "Writing ELF dynamic objects is not supported\n"); | |
d1ad85a6 | 2359 | bfd_set_error (bfd_error_wrong_format); |
38a5f510 ILT |
2360 | return false; |
2361 | } | |
2362 | ||
32090b8e KR |
2363 | if (abfd->output_has_begun == false) |
2364 | { | |
5e829a34 JL |
2365 | if (prep_headers (abfd) == false) |
2366 | return false; | |
2367 | if (elf_compute_section_file_positions (abfd) == false) | |
2368 | return false; | |
32090b8e KR |
2369 | abfd->output_has_begun = true; |
2370 | } | |
244ffee7 | 2371 | |
32090b8e KR |
2372 | i_shdrp = elf_elfsections (abfd); |
2373 | i_ehdrp = elf_elfheader (abfd); | |
244ffee7 | 2374 | |
32090b8e | 2375 | bfd_map_over_sections (abfd, write_relocs, (PTR) 0); |
32090b8e | 2376 | assign_file_positions_for_relocs (abfd); |
244ffee7 | 2377 | |
32090b8e | 2378 | /* After writing the headers, we need to write the sections too... */ |
062189c6 | 2379 | for (count = 1; count < i_ehdrp->e_shnum; count++) |
e621c5cc | 2380 | { |
e621c5cc ILT |
2381 | if (bed->elf_backend_section_processing) |
2382 | (*bed->elf_backend_section_processing) (abfd, i_shdrp[count]); | |
2383 | if (i_shdrp[count]->contents) | |
2384 | { | |
2385 | bfd_seek (abfd, i_shdrp[count]->sh_offset, SEEK_SET); | |
2386 | bfd_write (i_shdrp[count]->contents, i_shdrp[count]->sh_size, 1, | |
2387 | abfd); | |
2388 | } | |
2389 | } | |
062189c6 ILT |
2390 | |
2391 | if (bed->elf_backend_final_write_processing) | |
2392 | (*bed->elf_backend_final_write_processing) (abfd); | |
2393 | ||
32090b8e KR |
2394 | return write_shdrs_and_ehdr (abfd); |
2395 | } | |
244ffee7 | 2396 | |
32090b8e KR |
2397 | /* Given an index of a section, retrieve a pointer to it. Note |
2398 | that for our purposes, sections are indexed by {1, 2, ...} with | |
2399 | 0 being an illegal index. */ | |
244ffee7 | 2400 | |
32090b8e KR |
2401 | /* In the original, each ELF section went into exactly one BFD |
2402 | section. This doesn't really make sense, so we need a real mapping. | |
2403 | The mapping has to hide in the Elf_Internal_Shdr since asection | |
2404 | doesn't have anything like a tdata field... */ | |
244ffee7 | 2405 | |
32090b8e KR |
2406 | static struct sec * |
2407 | DEFUN (section_from_elf_index, (abfd, index), | |
2408 | bfd * abfd AND | |
2409 | int index) | |
2410 | { | |
2411 | /* @@ Is bfd_com_section really correct in all the places it could | |
2412 | be returned from this routine? */ | |
244ffee7 | 2413 | |
32090b8e KR |
2414 | if (index == SHN_ABS) |
2415 | return &bfd_com_section; /* not abs? */ | |
2416 | if (index == SHN_COMMON) | |
2417 | return &bfd_com_section; | |
244ffee7 | 2418 | |
32090b8e KR |
2419 | if (index > elf_elfheader (abfd)->e_shnum) |
2420 | return 0; | |
244ffee7 JK |
2421 | |
2422 | { | |
32090b8e | 2423 | Elf_Internal_Shdr *hdr = elf_elfsections (abfd)[index]; |
244ffee7 | 2424 | |
32090b8e | 2425 | switch (hdr->sh_type) |
244ffee7 | 2426 | { |
32090b8e KR |
2427 | /* ELF sections that map to BFD sections */ |
2428 | case SHT_PROGBITS: | |
2429 | case SHT_NOBITS: | |
2430 | if (!hdr->rawdata) | |
2431 | bfd_section_from_shdr (abfd, index); | |
2432 | return (struct sec *) hdr->rawdata; | |
244ffee7 | 2433 | |
32090b8e KR |
2434 | default: |
2435 | return (struct sec *) &bfd_abs_section; | |
244ffee7 | 2436 | } |
244ffee7 | 2437 | } |
32090b8e | 2438 | } |
244ffee7 | 2439 | |
32090b8e KR |
2440 | /* given a section, search the header to find them... */ |
2441 | static int | |
2442 | DEFUN (elf_section_from_bfd_section, (abfd, asect), | |
2443 | bfd * abfd AND | |
2444 | struct sec *asect) | |
2445 | { | |
2446 | Elf_Internal_Shdr **i_shdrp = elf_elfsections (abfd); | |
2447 | int index; | |
2448 | Elf_Internal_Shdr *hdr; | |
2449 | int maxindex = elf_elfheader (abfd)->e_shnum; | |
244ffee7 | 2450 | |
32090b8e KR |
2451 | if (asect == &bfd_abs_section) |
2452 | return SHN_ABS; | |
2453 | if (asect == &bfd_com_section) | |
2454 | return SHN_COMMON; | |
2455 | if (asect == &bfd_und_section) | |
2456 | return SHN_UNDEF; | |
244ffee7 | 2457 | |
32090b8e KR |
2458 | for (index = 0; index < maxindex; index++) |
2459 | { | |
2460 | hdr = i_shdrp[index]; | |
2461 | switch (hdr->sh_type) | |
2462 | { | |
2463 | /* ELF sections that map to BFD sections */ | |
2464 | case SHT_PROGBITS: | |
2465 | case SHT_NOBITS: | |
e621c5cc | 2466 | case SHT_NOTE: |
32090b8e KR |
2467 | if (hdr->rawdata) |
2468 | { | |
2469 | if (((struct sec *) (hdr->rawdata)) == asect) | |
2470 | return index; | |
2471 | } | |
2472 | break; | |
01383fb4 KR |
2473 | |
2474 | case SHT_STRTAB: | |
2475 | /* fix_up_strtabs will generate STRTAB sections with names | |
2476 | of .stab*str. */ | |
2477 | if (!strncmp (asect->name, ".stab", 5) | |
2478 | && !strcmp ("str", asect->name + strlen (asect->name) - 3)) | |
2479 | { | |
2480 | if (hdr->rawdata) | |
2481 | { | |
2482 | if (((struct sec *) (hdr->rawdata)) == asect) | |
2483 | return index; | |
2484 | } | |
2485 | break; | |
2486 | } | |
2487 | /* FALL THROUGH */ | |
32090b8e | 2488 | default: |
e621c5cc ILT |
2489 | { |
2490 | struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
2491 | ||
2492 | if (bed->elf_backend_section_from_bfd_section) | |
f035cc47 ILT |
2493 | { |
2494 | int retval; | |
2495 | ||
2496 | retval = index; | |
2497 | if ((*bed->elf_backend_section_from_bfd_section) | |
2498 | (abfd, hdr, asect, &retval)) | |
2499 | return retval; | |
2500 | } | |
e621c5cc | 2501 | } |
32090b8e KR |
2502 | break; |
2503 | } | |
2504 | } | |
2505 | return -1; | |
2506 | } | |
244ffee7 | 2507 | |
32090b8e KR |
2508 | /* given a symbol, return the bfd index for that symbol. */ |
2509 | static int | |
2510 | DEFUN (elf_symbol_from_bfd_symbol, (abfd, asym_ptr_ptr), | |
2511 | bfd * abfd AND | |
2512 | struct symbol_cache_entry **asym_ptr_ptr) | |
2513 | { | |
2514 | struct symbol_cache_entry *asym_ptr = *asym_ptr_ptr; | |
32090b8e | 2515 | int idx; |
d24928c0 | 2516 | flagword flags = asym_ptr->flags; |
32090b8e | 2517 | |
d24928c0 KR |
2518 | /* When gas creates relocations against local labels, it creates its |
2519 | own symbol for the section, but does put the symbol into the | |
e621c5cc ILT |
2520 | symbol chain, so udata is 0. When the linker is generating |
2521 | relocatable output, this section symbol may be for one of the | |
2522 | input sections rather than the output section. */ | |
d24928c0 KR |
2523 | if (asym_ptr->udata == (PTR) 0 |
2524 | && (flags & BSF_SECTION_SYM) | |
e621c5cc ILT |
2525 | && asym_ptr->section) |
2526 | { | |
2527 | int indx; | |
2528 | ||
2529 | if (asym_ptr->section->output_section != NULL) | |
2530 | indx = asym_ptr->section->output_section->index; | |
2531 | else | |
2532 | indx = asym_ptr->section->index; | |
2533 | if (elf_section_syms (abfd)[indx]) | |
2534 | asym_ptr->udata = elf_section_syms (abfd)[indx]->udata; | |
01383fb4 | 2535 | } |
e621c5cc | 2536 | |
d24928c0 KR |
2537 | if (asym_ptr->udata) |
2538 | idx = ((Elf_Sym_Extra *)asym_ptr->udata)->elf_sym_num; | |
2539 | else | |
32090b8e | 2540 | { |
32090b8e KR |
2541 | abort (); |
2542 | } | |
244ffee7 | 2543 | |
32090b8e | 2544 | #if DEBUG & 4 |
244ffee7 | 2545 | { |
244ffee7 | 2546 | |
32090b8e | 2547 | fprintf (stderr, |
d24928c0 KR |
2548 | "elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx %s\n", |
2549 | (long) asym_ptr, asym_ptr->name, idx, flags, elf_symbol_flags (flags)); | |
32090b8e KR |
2550 | fflush (stderr); |
2551 | } | |
2552 | #endif | |
2553 | ||
2554 | return idx; | |
2555 | } | |
2556 | ||
2557 | static boolean | |
2558 | DEFUN (elf_slurp_symbol_table, (abfd, symptrs), | |
2559 | bfd * abfd AND | |
2560 | asymbol ** symptrs) /* Buffer for generated bfd symbols */ | |
2561 | { | |
2562 | Elf_Internal_Shdr *hdr = &elf_tdata(abfd)->symtab_hdr; | |
2563 | int symcount; /* Number of external ELF symbols */ | |
2564 | int i; | |
2565 | elf_symbol_type *sym; /* Pointer to current bfd symbol */ | |
2566 | elf_symbol_type *symbase; /* Buffer for generated bfd symbols */ | |
2567 | Elf_Internal_Sym i_sym; | |
2568 | Elf_External_Sym *x_symp; | |
2569 | ||
2570 | /* this is only valid because there is only one symtab... */ | |
2571 | /* FIXME: This is incorrect, there may also be a dynamic symbol | |
2572 | table which is a subset of the full symbol table. We either need | |
2573 | to be prepared to read both (and merge them) or ensure that we | |
2574 | only read the full symbol table. Currently we only get called to | |
2575 | read the full symbol table. -fnf */ | |
244ffee7 | 2576 | |
32090b8e KR |
2577 | /* Read each raw ELF symbol, converting from external ELF form to |
2578 | internal ELF form, and then using the information to create a | |
2579 | canonical bfd symbol table entry. | |
244ffee7 | 2580 | |
32090b8e KR |
2581 | Note that we allocate the initial bfd canonical symbol buffer |
2582 | based on a one-to-one mapping of the ELF symbols to canonical | |
2583 | symbols. We actually use all the ELF symbols, so there will be no | |
2584 | space left over at the end. When we have all the symbols, we | |
2585 | build the caller's pointer vector. */ | |
244ffee7 | 2586 | |
32090b8e KR |
2587 | if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) == -1) |
2588 | { | |
d1ad85a6 | 2589 | bfd_set_error (bfd_error_system_call); |
32090b8e KR |
2590 | return false; |
2591 | } | |
244ffee7 | 2592 | |
32090b8e KR |
2593 | symcount = hdr->sh_size / sizeof (Elf_External_Sym); |
2594 | symbase = (elf_symbol_type *) bfd_zalloc (abfd, symcount * sizeof (elf_symbol_type)); | |
2595 | sym = symbase; | |
244ffee7 | 2596 | |
32090b8e | 2597 | /* Temporarily allocate room for the raw ELF symbols. */ |
b9d5cdf0 | 2598 | x_symp = (Elf_External_Sym *) malloc (symcount * sizeof (Elf_External_Sym)); |
9783e04a | 2599 | if (!symbase || !x_symp) |
b9d5cdf0 | 2600 | { |
d1ad85a6 | 2601 | bfd_set_error (bfd_error_no_memory); |
b9d5cdf0 DM |
2602 | return false; |
2603 | } | |
244ffee7 | 2604 | |
32090b8e KR |
2605 | if (bfd_read ((PTR) x_symp, sizeof (Elf_External_Sym), symcount, abfd) |
2606 | != symcount * sizeof (Elf_External_Sym)) | |
244ffee7 | 2607 | { |
32090b8e | 2608 | free ((PTR) x_symp); |
d1ad85a6 | 2609 | bfd_set_error (bfd_error_system_call); |
32090b8e | 2610 | return false; |
244ffee7 | 2611 | } |
32090b8e KR |
2612 | /* Skip first symbol, which is a null dummy. */ |
2613 | for (i = 1; i < symcount; i++) | |
244ffee7 | 2614 | { |
32090b8e KR |
2615 | elf_swap_symbol_in (abfd, x_symp + i, &i_sym); |
2616 | memcpy (&sym->internal_elf_sym, &i_sym, sizeof (Elf_Internal_Sym)); | |
e621c5cc | 2617 | #ifdef ELF_KEEP_EXTSYM |
32090b8e | 2618 | memcpy (&sym->native_elf_sym, x_symp + i, sizeof (Elf_External_Sym)); |
e621c5cc | 2619 | #endif |
32090b8e | 2620 | sym->symbol.the_bfd = abfd; |
244ffee7 | 2621 | |
32090b8e KR |
2622 | sym->symbol.name = elf_string_from_elf_section (abfd, hdr->sh_link, |
2623 | i_sym.st_name); | |
244ffee7 | 2624 | |
32090b8e | 2625 | sym->symbol.value = i_sym.st_value; |
244ffee7 | 2626 | |
32090b8e KR |
2627 | if (i_sym.st_shndx > 0 && i_sym.st_shndx < SHN_LORESERV) |
2628 | { | |
2629 | sym->symbol.section = section_from_elf_index (abfd, i_sym.st_shndx); | |
2630 | } | |
2631 | else if (i_sym.st_shndx == SHN_ABS) | |
2632 | { | |
2633 | sym->symbol.section = &bfd_abs_section; | |
2634 | } | |
2635 | else if (i_sym.st_shndx == SHN_COMMON) | |
2636 | { | |
2637 | sym->symbol.section = &bfd_com_section; | |
2638 | /* Elf puts the alignment into the `value' field, and the size | |
2639 | into the `size' field. BFD wants to see the size in the | |
2640 | value field, and doesn't care (at the moment) about the | |
2641 | alignment. */ | |
2642 | sym->symbol.value = i_sym.st_size; | |
2643 | } | |
2644 | else if (i_sym.st_shndx == SHN_UNDEF) | |
2645 | { | |
2646 | sym->symbol.section = &bfd_und_section; | |
2647 | } | |
2648 | else | |
2649 | sym->symbol.section = &bfd_abs_section; | |
244ffee7 | 2650 | |
32090b8e | 2651 | sym->symbol.value -= sym->symbol.section->vma; |
244ffee7 | 2652 | |
32090b8e | 2653 | switch (ELF_ST_BIND (i_sym.st_info)) |
244ffee7 | 2654 | { |
32090b8e KR |
2655 | case STB_LOCAL: |
2656 | sym->symbol.flags |= BSF_LOCAL; | |
2657 | break; | |
2658 | case STB_GLOBAL: | |
d24928c0 | 2659 | sym->symbol.flags |= BSF_GLOBAL; |
32090b8e KR |
2660 | break; |
2661 | case STB_WEAK: | |
2662 | sym->symbol.flags |= BSF_WEAK; | |
2663 | break; | |
2664 | } | |
244ffee7 | 2665 | |
32090b8e KR |
2666 | switch (ELF_ST_TYPE (i_sym.st_info)) |
2667 | { | |
2668 | case STT_SECTION: | |
2669 | sym->symbol.flags |= BSF_SECTION_SYM | BSF_DEBUGGING; | |
2670 | break; | |
2671 | case STT_FILE: | |
2672 | sym->symbol.flags |= BSF_FILE | BSF_DEBUGGING; | |
2673 | break; | |
2674 | case STT_FUNC: | |
2675 | sym->symbol.flags |= BSF_FUNCTION; | |
2676 | break; | |
244ffee7 | 2677 | } |
300adb31 | 2678 | |
e621c5cc ILT |
2679 | /* Do some backend-specific processing on this symbol. */ |
2680 | { | |
2681 | struct elf_backend_data *ebd = get_elf_backend_data (abfd); | |
2682 | if (ebd->elf_backend_symbol_processing) | |
2683 | (*ebd->elf_backend_symbol_processing) (abfd, &sym->symbol); | |
2684 | } | |
244ffee7 | 2685 | |
32090b8e | 2686 | sym++; |
244ffee7 JK |
2687 | } |
2688 | ||
e621c5cc ILT |
2689 | /* Do some backend-specific processing on this symbol table. */ |
2690 | { | |
2691 | struct elf_backend_data *ebd = get_elf_backend_data (abfd); | |
2692 | if (ebd->elf_backend_symbol_table_processing) | |
2693 | (*ebd->elf_backend_symbol_table_processing) (abfd, symbase, symcount); | |
2694 | } | |
244ffee7 | 2695 | |
e621c5cc | 2696 | /* We rely on the zalloc to clear out the final symbol entry. */ |
244ffee7 | 2697 | |
32090b8e KR |
2698 | bfd_get_symcount (abfd) = symcount = sym - symbase; |
2699 | ||
2700 | /* Fill in the user's symbol pointer vector if needed. */ | |
2701 | if (symptrs) | |
244ffee7 | 2702 | { |
32090b8e KR |
2703 | sym = symbase; |
2704 | while (symcount-- > 0) | |
244ffee7 | 2705 | { |
32090b8e KR |
2706 | *symptrs++ = &sym->symbol; |
2707 | sym++; | |
244ffee7 | 2708 | } |
32090b8e | 2709 | *symptrs = 0; /* Final null pointer */ |
244ffee7 JK |
2710 | } |
2711 | ||
38a5f510 | 2712 | free ((PTR) x_symp); |
244ffee7 JK |
2713 | return true; |
2714 | } | |
2715 | ||
32090b8e | 2716 | /* Return the number of bytes required to hold the symtab vector. |
244ffee7 | 2717 | |
32090b8e KR |
2718 | Note that we base it on the count plus 1, since we will null terminate |
2719 | the vector allocated based on this size. However, the ELF symbol table | |
2720 | always has a dummy entry as symbol #0, so it ends up even. */ | |
244ffee7 | 2721 | |
32090b8e KR |
2722 | unsigned int |
2723 | DEFUN (elf_get_symtab_upper_bound, (abfd), bfd * abfd) | |
244ffee7 | 2724 | { |
32090b8e KR |
2725 | unsigned int symcount; |
2726 | unsigned int symtab_size = 0; | |
244ffee7 | 2727 | |
32090b8e KR |
2728 | Elf_Internal_Shdr *hdr = &elf_tdata(abfd)->symtab_hdr; |
2729 | symcount = hdr->sh_size / sizeof (Elf_External_Sym); | |
2730 | symtab_size = (symcount - 1 + 1) * (sizeof (asymbol)); | |
244ffee7 | 2731 | |
32090b8e KR |
2732 | return symtab_size; |
2733 | } | |
244ffee7 | 2734 | |
32090b8e KR |
2735 | /* |
2736 | This function return the number of bytes required to store the | |
2737 | relocation information associated with section <<sect>> | |
2738 | attached to bfd <<abfd>> | |
244ffee7 | 2739 | |
32090b8e KR |
2740 | */ |
2741 | unsigned int | |
2742 | elf_get_reloc_upper_bound (abfd, asect) | |
2743 | bfd *abfd; | |
2744 | sec_ptr asect; | |
2745 | { | |
2746 | if (asect->flags & SEC_RELOC) | |
2747 | { | |
2748 | /* either rel or rela */ | |
2749 | return elf_section_data(asect)->rel_hdr.sh_size; | |
2750 | } | |
2751 | else | |
2752 | return 0; | |
244ffee7 JK |
2753 | } |
2754 | ||
32090b8e KR |
2755 | static boolean |
2756 | DEFUN (elf_slurp_reloca_table, (abfd, asect, symbols), | |
244ffee7 | 2757 | bfd * abfd AND |
32090b8e KR |
2758 | sec_ptr asect AND |
2759 | asymbol ** symbols) | |
244ffee7 | 2760 | { |
32090b8e KR |
2761 | Elf_External_Rela *native_relocs; |
2762 | arelent *reloc_cache; | |
2763 | arelent *cache_ptr; | |
244ffee7 | 2764 | |
32090b8e | 2765 | unsigned int idx; |
244ffee7 | 2766 | |
32090b8e KR |
2767 | if (asect->relocation) |
2768 | return true; | |
2769 | if (asect->reloc_count == 0) | |
2770 | return true; | |
2771 | if (asect->flags & SEC_CONSTRUCTOR) | |
2772 | return true; | |
244ffee7 | 2773 | |
32090b8e KR |
2774 | bfd_seek (abfd, asect->rel_filepos, SEEK_SET); |
2775 | native_relocs = (Elf_External_Rela *) | |
2776 | bfd_alloc (abfd, asect->reloc_count * sizeof (Elf_External_Rela)); | |
9783e04a DM |
2777 | if (!native_relocs) |
2778 | if (!reloc_cache) | |
2779 | { | |
d1ad85a6 | 2780 | bfd_set_error (bfd_error_no_memory); |
9783e04a DM |
2781 | return false; |
2782 | } | |
32090b8e KR |
2783 | bfd_read ((PTR) native_relocs, |
2784 | sizeof (Elf_External_Rela), asect->reloc_count, abfd); | |
244ffee7 | 2785 | |
32090b8e KR |
2786 | reloc_cache = (arelent *) |
2787 | bfd_alloc (abfd, (size_t) (asect->reloc_count * sizeof (arelent))); | |
2788 | ||
2789 | if (!reloc_cache) | |
6a3eb9b6 | 2790 | { |
d1ad85a6 | 2791 | bfd_set_error (bfd_error_no_memory); |
32090b8e | 2792 | return false; |
6a3eb9b6 | 2793 | } |
244ffee7 | 2794 | |
32090b8e KR |
2795 | for (idx = 0; idx < asect->reloc_count; idx++) |
2796 | { | |
32090b8e KR |
2797 | Elf_Internal_Rela dst; |
2798 | Elf_External_Rela *src; | |
244ffee7 | 2799 | |
32090b8e KR |
2800 | cache_ptr = reloc_cache + idx; |
2801 | src = native_relocs + idx; | |
2802 | elf_swap_reloca_in (abfd, src, &dst); | |
244ffee7 | 2803 | |
d24928c0 | 2804 | #ifdef RELOC_PROCESSING |
32090b8e KR |
2805 | RELOC_PROCESSING (cache_ptr, &dst, symbols, abfd, asect); |
2806 | #else | |
32090b8e KR |
2807 | if (asect->flags & SEC_RELOC) |
2808 | { | |
2809 | /* relocatable, so the offset is off of the section */ | |
2810 | cache_ptr->address = dst.r_offset + asect->vma; | |
2811 | } | |
2812 | else | |
2813 | { | |
2814 | /* non-relocatable, so the offset a virtual address */ | |
2815 | cache_ptr->address = dst.r_offset; | |
2816 | } | |
7b8106b4 ILT |
2817 | |
2818 | /* ELF_R_SYM(dst.r_info) is the symbol table offset. An offset | |
2819 | of zero points to the dummy symbol, which was not read into | |
2820 | the symbol table SYMBOLS. */ | |
2821 | if (ELF_R_SYM (dst.r_info) == 0) | |
2822 | cache_ptr->sym_ptr_ptr = bfd_abs_section.symbol_ptr_ptr; | |
2823 | else | |
2824 | { | |
2825 | asymbol *s; | |
2826 | ||
2827 | cache_ptr->sym_ptr_ptr = symbols + ELF_R_SYM (dst.r_info) - 1; | |
2828 | ||
2829 | /* Translate any ELF section symbol into a BFD section | |
2830 | symbol. */ | |
2831 | s = *(cache_ptr->sym_ptr_ptr); | |
2832 | if (s->flags & BSF_SECTION_SYM) | |
2833 | { | |
2834 | cache_ptr->sym_ptr_ptr = s->section->symbol_ptr_ptr; | |
2835 | s = *cache_ptr->sym_ptr_ptr; | |
2836 | if (s->name == 0 || s->name[0] == 0) | |
2837 | abort (); | |
2838 | } | |
2839 | } | |
32090b8e | 2840 | cache_ptr->addend = dst.r_addend; |
244ffee7 | 2841 | |
32090b8e KR |
2842 | /* Fill in the cache_ptr->howto field from dst.r_type */ |
2843 | { | |
2844 | struct elf_backend_data *ebd = get_elf_backend_data (abfd); | |
2845 | (*ebd->elf_info_to_howto) (abfd, cache_ptr, &dst); | |
2846 | } | |
2847 | #endif | |
2848 | } | |
244ffee7 | 2849 | |
32090b8e KR |
2850 | asect->relocation = reloc_cache; |
2851 | return true; | |
2852 | } | |
238ac6ec | 2853 | |
32090b8e KR |
2854 | #ifdef DEBUG |
2855 | static void | |
2856 | elf_debug_section (str, num, hdr) | |
2857 | char *str; | |
2858 | int num; | |
2859 | Elf_Internal_Shdr *hdr; | |
2860 | { | |
2861 | fprintf (stderr, "\nSection#%d '%s' 0x%.8lx\n", num, str, (long) hdr); | |
2862 | fprintf (stderr, | |
2863 | "sh_name = %ld\tsh_type = %ld\tsh_flags = %ld\n", | |
2864 | (long) hdr->sh_name, | |
2865 | (long) hdr->sh_type, | |
2866 | (long) hdr->sh_flags); | |
2867 | fprintf (stderr, | |
2868 | "sh_addr = %ld\tsh_offset = %ld\tsh_size = %ld\n", | |
2869 | (long) hdr->sh_addr, | |
2870 | (long) hdr->sh_offset, | |
2871 | (long) hdr->sh_size); | |
2872 | fprintf (stderr, | |
2873 | "sh_link = %ld\tsh_info = %ld\tsh_addralign = %ld\n", | |
2874 | (long) hdr->sh_link, | |
2875 | (long) hdr->sh_info, | |
2876 | (long) hdr->sh_addralign); | |
2877 | fprintf (stderr, "sh_entsize = %ld\n", | |
2878 | (long) hdr->sh_entsize); | |
2879 | fprintf (stderr, "rawdata = 0x%.8lx\n", (long) hdr->rawdata); | |
2880 | fprintf (stderr, "contents = 0x%.8lx\n", (long) hdr->contents); | |
2881 | fprintf (stderr, "size = %ld\n", (long) hdr->size); | |
2882 | fflush (stderr); | |
2883 | } | |
244ffee7 | 2884 | |
32090b8e KR |
2885 | static void |
2886 | elf_debug_file (ehdrp) | |
2887 | Elf_Internal_Ehdr *ehdrp; | |
2888 | { | |
2889 | fprintf (stderr, "e_entry = 0x%.8lx\n", (long) ehdrp->e_entry); | |
2890 | fprintf (stderr, "e_phoff = %ld\n", (long) ehdrp->e_phoff); | |
2891 | fprintf (stderr, "e_phnum = %ld\n", (long) ehdrp->e_phnum); | |
2892 | fprintf (stderr, "e_phentsize = %ld\n", (long) ehdrp->e_phentsize); | |
2893 | fprintf (stderr, "e_shoff = %ld\n", (long) ehdrp->e_shoff); | |
2894 | fprintf (stderr, "e_shnum = %ld\n", (long) ehdrp->e_shnum); | |
2895 | fprintf (stderr, "e_shentsize = %ld\n", (long) ehdrp->e_shentsize); | |
244ffee7 | 2896 | } |
32090b8e | 2897 | #endif |
244ffee7 JK |
2898 | |
2899 | static boolean | |
32090b8e | 2900 | DEFUN (elf_slurp_reloc_table, (abfd, asect, symbols), |
244ffee7 | 2901 | bfd * abfd AND |
32090b8e KR |
2902 | sec_ptr asect AND |
2903 | asymbol ** symbols) | |
244ffee7 | 2904 | { |
32090b8e KR |
2905 | Elf_External_Rel *native_relocs; |
2906 | arelent *reloc_cache; | |
2907 | arelent *cache_ptr; | |
2908 | Elf_Internal_Shdr *data_hdr; | |
2909 | ElfNAME (Off) data_off; | |
2910 | ElfNAME (Word) data_max; | |
2911 | char buf[4]; /* FIXME -- might be elf64 */ | |
244ffee7 | 2912 | |
32090b8e | 2913 | unsigned int idx; |
244ffee7 | 2914 | |
32090b8e KR |
2915 | if (asect->relocation) |
2916 | return true; | |
2917 | if (asect->reloc_count == 0) | |
2918 | return true; | |
2919 | if (asect->flags & SEC_CONSTRUCTOR) | |
2920 | return true; | |
244ffee7 | 2921 | |
32090b8e KR |
2922 | bfd_seek (abfd, asect->rel_filepos, SEEK_SET); |
2923 | native_relocs = (Elf_External_Rel *) | |
2924 | bfd_alloc (abfd, asect->reloc_count * sizeof (Elf_External_Rel)); | |
9783e04a DM |
2925 | if (!native_relocs) |
2926 | { | |
d1ad85a6 | 2927 | bfd_set_error (bfd_error_no_memory); |
9783e04a DM |
2928 | return false; |
2929 | } | |
32090b8e KR |
2930 | bfd_read ((PTR) native_relocs, |
2931 | sizeof (Elf_External_Rel), asect->reloc_count, abfd); | |
244ffee7 | 2932 | |
32090b8e KR |
2933 | reloc_cache = (arelent *) |
2934 | bfd_alloc (abfd, (size_t) (asect->reloc_count * sizeof (arelent))); | |
2935 | ||
2936 | if (!reloc_cache) | |
244ffee7 | 2937 | { |
d1ad85a6 | 2938 | bfd_set_error (bfd_error_no_memory); |
244ffee7 JK |
2939 | return false; |
2940 | } | |
2941 | ||
32090b8e KR |
2942 | /* Get the offset of the start of the segment we are relocating to read in |
2943 | the implicit addend. */ | |
2944 | data_hdr = &elf_section_data(asect)->this_hdr; | |
2945 | data_off = data_hdr->sh_offset; | |
2946 | data_max = data_hdr->sh_size - sizeof (buf) + 1; | |
244ffee7 | 2947 | |
32090b8e KR |
2948 | #if DEBUG & 2 |
2949 | elf_debug_section ("data section", -1, data_hdr); | |
2950 | #endif | |
244ffee7 | 2951 | |
32090b8e | 2952 | for (idx = 0; idx < asect->reloc_count; idx++) |
244ffee7 | 2953 | { |
32090b8e KR |
2954 | #ifdef RELOC_PROCESSING |
2955 | Elf_Internal_Rel dst; | |
2956 | Elf_External_Rel *src; | |
244ffee7 | 2957 | |
32090b8e KR |
2958 | cache_ptr = reloc_cache + idx; |
2959 | src = native_relocs + idx; | |
2960 | elf_swap_reloc_in (abfd, src, &dst); | |
244ffee7 | 2961 | |
32090b8e KR |
2962 | RELOC_PROCESSING (cache_ptr, &dst, symbols, abfd, asect); |
2963 | #else | |
2964 | Elf_Internal_Rel dst; | |
2965 | Elf_External_Rel *src; | |
6a3eb9b6 | 2966 | |
32090b8e KR |
2967 | cache_ptr = reloc_cache + idx; |
2968 | src = native_relocs + idx; | |
2969 | ||
2970 | elf_swap_reloc_in (abfd, src, &dst); | |
2971 | ||
2972 | if (asect->flags & SEC_RELOC) | |
244ffee7 | 2973 | { |
32090b8e KR |
2974 | /* relocatable, so the offset is off of the section */ |
2975 | cache_ptr->address = dst.r_offset + asect->vma; | |
244ffee7 | 2976 | } |
32090b8e | 2977 | else |
244ffee7 | 2978 | { |
32090b8e KR |
2979 | /* non-relocatable, so the offset a virtual address */ |
2980 | cache_ptr->address = dst.r_offset; | |
244ffee7 | 2981 | } |
7b8106b4 ILT |
2982 | |
2983 | /* ELF_R_SYM(dst.r_info) is the symbol table offset. An offset | |
2984 | of zero points to the dummy symbol, which was not read into | |
2985 | the symbol table SYMBOLS. */ | |
2986 | if (ELF_R_SYM (dst.r_info) == 0) | |
2987 | cache_ptr->sym_ptr_ptr = bfd_abs_section.symbol_ptr_ptr; | |
2988 | else | |
2989 | { | |
2990 | asymbol *s; | |
2991 | ||
2992 | cache_ptr->sym_ptr_ptr = symbols + ELF_R_SYM (dst.r_info) - 1; | |
2993 | ||
2994 | /* Translate any ELF section symbol into a BFD section | |
2995 | symbol. */ | |
2996 | s = *(cache_ptr->sym_ptr_ptr); | |
2997 | if (s->flags & BSF_SECTION_SYM) | |
2998 | { | |
2999 | cache_ptr->sym_ptr_ptr = s->section->symbol_ptr_ptr; | |
3000 | s = *cache_ptr->sym_ptr_ptr; | |
3001 | if (s->name == 0 || s->name[0] == 0) | |
3002 | abort (); | |
3003 | } | |
3004 | } | |
32090b8e | 3005 | BFD_ASSERT (dst.r_offset <= data_max); |
d24928c0 | 3006 | cache_ptr->addend = 0; |
244ffee7 | 3007 | |
32090b8e KR |
3008 | /* Fill in the cache_ptr->howto field from dst.r_type */ |
3009 | { | |
3010 | struct elf_backend_data *ebd = get_elf_backend_data (abfd); | |
3011 | (*ebd->elf_info_to_howto_rel) (abfd, cache_ptr, &dst); | |
3012 | } | |
3013 | #endif | |
3014 | } | |
244ffee7 | 3015 | |
32090b8e KR |
3016 | asect->relocation = reloc_cache; |
3017 | return true; | |
3018 | } | |
244ffee7 | 3019 | |
32090b8e KR |
3020 | unsigned int |
3021 | elf_canonicalize_reloc (abfd, section, relptr, symbols) | |
3022 | bfd *abfd; | |
3023 | sec_ptr section; | |
3024 | arelent **relptr; | |
3025 | asymbol **symbols; | |
3026 | { | |
3027 | arelent *tblptr = section->relocation; | |
3028 | unsigned int count = 0; | |
3029 | int use_rela_p = get_elf_backend_data (abfd)->use_rela_p; | |
3030 | ||
3031 | /* snarfed from coffcode.h */ | |
3032 | if (use_rela_p) | |
3033 | elf_slurp_reloca_table (abfd, section, symbols); | |
3034 | else | |
3035 | elf_slurp_reloc_table (abfd, section, symbols); | |
3036 | ||
3037 | tblptr = section->relocation; | |
3038 | if (!tblptr) | |
3039 | return 0; | |
3040 | ||
3041 | for (; count++ < section->reloc_count;) | |
3042 | *relptr++ = tblptr++; | |
3043 | ||
3044 | *relptr = 0; | |
3045 | return section->reloc_count; | |
3046 | } | |
3047 | ||
3048 | unsigned int | |
3049 | DEFUN (elf_get_symtab, (abfd, alocation), | |
3050 | bfd * abfd AND | |
3051 | asymbol ** alocation) | |
3052 | { | |
3053 | ||
3054 | if (!elf_slurp_symbol_table (abfd, alocation)) | |
3055 | return 0; | |
3056 | else | |
3057 | return bfd_get_symcount (abfd); | |
3058 | } | |
3059 | ||
3060 | asymbol * | |
3061 | DEFUN (elf_make_empty_symbol, (abfd), | |
3062 | bfd * abfd) | |
3063 | { | |
3064 | elf_symbol_type *newsym; | |
3065 | ||
3066 | newsym = (elf_symbol_type *) bfd_zalloc (abfd, sizeof (elf_symbol_type)); | |
3067 | if (!newsym) | |
3068 | { | |
d1ad85a6 | 3069 | bfd_set_error (bfd_error_no_memory); |
32090b8e KR |
3070 | return NULL; |
3071 | } | |
3072 | else | |
3073 | { | |
3074 | newsym->symbol.the_bfd = abfd; | |
3075 | return &newsym->symbol; | |
244ffee7 | 3076 | } |
32090b8e | 3077 | } |
244ffee7 | 3078 | |
32090b8e KR |
3079 | void |
3080 | DEFUN (elf_get_symbol_info, (ignore_abfd, symbol, ret), | |
3081 | bfd * ignore_abfd AND | |
3082 | asymbol * symbol AND | |
3083 | symbol_info * ret) | |
3084 | { | |
3085 | bfd_symbol_info (symbol, ret); | |
3086 | } | |
244ffee7 | 3087 | |
32090b8e KR |
3088 | void |
3089 | DEFUN (elf_print_symbol, (ignore_abfd, filep, symbol, how), | |
3090 | bfd * ignore_abfd AND | |
3091 | PTR filep AND | |
3092 | asymbol * symbol AND | |
3093 | bfd_print_symbol_type how) | |
3094 | { | |
3095 | FILE *file = (FILE *) filep; | |
3096 | switch (how) | |
3097 | { | |
3098 | case bfd_print_symbol_name: | |
3099 | fprintf (file, "%s", symbol->name); | |
3100 | break; | |
3101 | case bfd_print_symbol_more: | |
3102 | fprintf (file, "elf "); | |
3103 | fprintf_vma (file, symbol->value); | |
3104 | fprintf (file, " %lx", (long) symbol->flags); | |
3105 | break; | |
3106 | case bfd_print_symbol_all: | |
3107 | { | |
3108 | CONST char *section_name; | |
3109 | section_name = symbol->section ? symbol->section->name : "(*none*)"; | |
3110 | bfd_print_symbol_vandf ((PTR) file, symbol); | |
3111 | fprintf (file, " %s\t%s", | |
3112 | section_name, | |
3113 | symbol->name); | |
3114 | } | |
3115 | break; | |
3116 | } | |
244ffee7 | 3117 | |
32090b8e | 3118 | } |
244ffee7 | 3119 | |
32090b8e KR |
3120 | alent * |
3121 | DEFUN (elf_get_lineno, (ignore_abfd, symbol), | |
3122 | bfd * ignore_abfd AND | |
3123 | asymbol * symbol) | |
3124 | { | |
3125 | fprintf (stderr, "elf_get_lineno unimplemented\n"); | |
3126 | fflush (stderr); | |
3127 | BFD_FAIL (); | |
3128 | return NULL; | |
3129 | } | |
3130 | ||
3131 | boolean | |
3132 | DEFUN (elf_set_arch_mach, (abfd, arch, machine), | |
3133 | bfd * abfd AND | |
3134 | enum bfd_architecture arch AND | |
3135 | unsigned long machine) | |
3136 | { | |
3137 | /* Allow any architecture to be supported by the elf backend */ | |
3138 | switch (arch) | |
244ffee7 | 3139 | { |
32090b8e KR |
3140 | case bfd_arch_unknown: /* EM_NONE */ |
3141 | case bfd_arch_sparc: /* EM_SPARC */ | |
3142 | case bfd_arch_i386: /* EM_386 */ | |
3143 | case bfd_arch_m68k: /* EM_68K */ | |
3144 | case bfd_arch_m88k: /* EM_88K */ | |
3145 | case bfd_arch_i860: /* EM_860 */ | |
3146 | case bfd_arch_mips: /* EM_MIPS (MIPS R3000) */ | |
3147 | case bfd_arch_hppa: /* EM_HPPA (HP PA_RISC) */ | |
3148 | return bfd_default_set_arch_mach (abfd, arch, machine); | |
3149 | default: | |
3150 | return false; | |
244ffee7 | 3151 | } |
32090b8e | 3152 | } |
244ffee7 | 3153 | |
32090b8e KR |
3154 | boolean |
3155 | DEFUN (elf_find_nearest_line, (abfd, | |
3156 | section, | |
3157 | symbols, | |
3158 | offset, | |
3159 | filename_ptr, | |
3160 | functionname_ptr, | |
3161 | line_ptr), | |
3162 | bfd * abfd AND | |
3163 | asection * section AND | |
3164 | asymbol ** symbols AND | |
3165 | bfd_vma offset AND | |
3166 | CONST char **filename_ptr AND | |
3167 | CONST char **functionname_ptr AND | |
3168 | unsigned int *line_ptr) | |
3169 | { | |
3170 | return false; | |
244ffee7 JK |
3171 | } |
3172 | ||
32090b8e KR |
3173 | int |
3174 | DEFUN (elf_sizeof_headers, (abfd, reloc), | |
3175 | bfd * abfd AND | |
3176 | boolean reloc) | |
3177 | { | |
3178 | fprintf (stderr, "elf_sizeof_headers unimplemented\n"); | |
3179 | fflush (stderr); | |
3180 | BFD_FAIL (); | |
3181 | return 0; | |
3182 | } | |
244ffee7 | 3183 | |
32090b8e KR |
3184 | boolean |
3185 | DEFUN (elf_set_section_contents, (abfd, section, location, offset, count), | |
3186 | bfd * abfd AND | |
3187 | sec_ptr section AND | |
3188 | PTR location AND | |
3189 | file_ptr offset AND | |
3190 | bfd_size_type count) | |
244ffee7 | 3191 | { |
244ffee7 JK |
3192 | Elf_Internal_Shdr *hdr; |
3193 | ||
32090b8e | 3194 | if (abfd->output_has_begun == false) /* set by bfd.c handler? */ |
244ffee7 | 3195 | { |
32090b8e | 3196 | /* do setup calculations (FIXME) */ |
5e829a34 JL |
3197 | if (prep_headers (abfd) == false) |
3198 | return false; | |
3199 | if (elf_compute_section_file_positions (abfd) == false) | |
3200 | return false; | |
32090b8e | 3201 | abfd->output_has_begun = true; |
244ffee7 | 3202 | } |
244ffee7 | 3203 | |
32090b8e | 3204 | hdr = &elf_section_data(section)->this_hdr; |
244ffee7 | 3205 | |
32090b8e KR |
3206 | if (bfd_seek (abfd, hdr->sh_offset + offset, SEEK_SET) == -1) |
3207 | return false; | |
3208 | if (bfd_write (location, 1, count, abfd) != count) | |
3209 | return false; | |
3210 | ||
3211 | return true; | |
3212 | } | |
3213 | ||
3214 | void | |
3215 | DEFUN (elf_no_info_to_howto, (abfd, cache_ptr, dst), | |
3216 | bfd * abfd AND | |
3217 | arelent * cache_ptr AND | |
3218 | Elf_Internal_Rela * dst) | |
244ffee7 | 3219 | { |
32090b8e KR |
3220 | fprintf (stderr, "elf RELA relocation support for target machine unimplemented\n"); |
3221 | fflush (stderr); | |
3222 | BFD_FAIL (); | |
244ffee7 JK |
3223 | } |
3224 | ||
32090b8e KR |
3225 | void |
3226 | DEFUN (elf_no_info_to_howto_rel, (abfd, cache_ptr, dst), | |
244ffee7 | 3227 | bfd * abfd AND |
32090b8e KR |
3228 | arelent * cache_ptr AND |
3229 | Elf_Internal_Rel * dst) | |
244ffee7 | 3230 | { |
32090b8e KR |
3231 | fprintf (stderr, "elf REL relocation support for target machine unimplemented\n"); |
3232 | fflush (stderr); | |
3233 | BFD_FAIL (); | |
3234 | } | |
244ffee7 | 3235 | |
32090b8e KR |
3236 | \f |
3237 | /* Core file support */ | |
244ffee7 | 3238 | |
32090b8e KR |
3239 | #ifdef HAVE_PROCFS /* Some core file support requires host /proc files */ |
3240 | #include <sys/procfs.h> | |
3241 | #else | |
3242 | #define bfd_prstatus(abfd, descdata, descsz, filepos) /* Define away */ | |
3243 | #define bfd_fpregset(abfd, descdata, descsz, filepos) /* Define away */ | |
3244 | #define bfd_prpsinfo(abfd, descdata, descsz, filepos) /* Define away */ | |
3245 | #endif | |
244ffee7 | 3246 | |
32090b8e | 3247 | #ifdef HAVE_PROCFS |
244ffee7 | 3248 | |
32090b8e KR |
3249 | static void |
3250 | DEFUN (bfd_prstatus, (abfd, descdata, descsz, filepos), | |
3251 | bfd * abfd AND | |
3252 | char *descdata AND | |
3253 | int descsz AND | |
3254 | long filepos) | |
3255 | { | |
3256 | asection *newsect; | |
3257 | prstatus_t *status = (prstatus_t *) 0; | |
244ffee7 | 3258 | |
32090b8e | 3259 | if (descsz == sizeof (prstatus_t)) |
244ffee7 | 3260 | { |
32090b8e KR |
3261 | newsect = bfd_make_section (abfd, ".reg"); |
3262 | newsect->_raw_size = sizeof (status->pr_reg); | |
3263 | newsect->filepos = filepos + (long) &status->pr_reg; | |
3264 | newsect->flags = SEC_ALLOC | SEC_HAS_CONTENTS; | |
3265 | newsect->alignment_power = 2; | |
3266 | if ((core_prstatus (abfd) = bfd_alloc (abfd, descsz)) != NULL) | |
3267 | { | |
3268 | memcpy (core_prstatus (abfd), descdata, descsz); | |
3269 | } | |
244ffee7 | 3270 | } |
32090b8e | 3271 | } |
244ffee7 | 3272 | |
32090b8e | 3273 | /* Stash a copy of the prpsinfo structure away for future use. */ |
244ffee7 | 3274 | |
32090b8e KR |
3275 | static void |
3276 | DEFUN (bfd_prpsinfo, (abfd, descdata, descsz, filepos), | |
3277 | bfd * abfd AND | |
3278 | char *descdata AND | |
3279 | int descsz AND | |
3280 | long filepos) | |
3281 | { | |
3282 | asection *newsect; | |
244ffee7 | 3283 | |
32090b8e KR |
3284 | if (descsz == sizeof (prpsinfo_t)) |
3285 | { | |
3286 | if ((core_prpsinfo (abfd) = bfd_alloc (abfd, descsz)) != NULL) | |
244ffee7 | 3287 | { |
32090b8e | 3288 | memcpy (core_prpsinfo (abfd), descdata, descsz); |
244ffee7 | 3289 | } |
244ffee7 | 3290 | } |
244ffee7 JK |
3291 | } |
3292 | ||
244ffee7 | 3293 | static void |
32090b8e KR |
3294 | DEFUN (bfd_fpregset, (abfd, descdata, descsz, filepos), |
3295 | bfd * abfd AND | |
3296 | char *descdata AND | |
3297 | int descsz AND | |
3298 | long filepos) | |
244ffee7 | 3299 | { |
32090b8e | 3300 | asection *newsect; |
244ffee7 | 3301 | |
32090b8e KR |
3302 | newsect = bfd_make_section (abfd, ".reg2"); |
3303 | newsect->_raw_size = descsz; | |
3304 | newsect->filepos = filepos; | |
3305 | newsect->flags = SEC_ALLOC | SEC_HAS_CONTENTS; | |
3306 | newsect->alignment_power = 2; | |
6a3eb9b6 | 3307 | } |
244ffee7 | 3308 | |
32090b8e KR |
3309 | #endif /* HAVE_PROCFS */ |
3310 | ||
3311 | /* Return a pointer to the args (including the command name) that were | |
3312 | seen by the program that generated the core dump. Note that for | |
3313 | some reason, a spurious space is tacked onto the end of the args | |
3314 | in some (at least one anyway) implementations, so strip it off if | |
3315 | it exists. */ | |
3316 | ||
3317 | char * | |
3318 | DEFUN (elf_core_file_failing_command, (abfd), | |
3319 | bfd * abfd) | |
244ffee7 | 3320 | { |
32090b8e KR |
3321 | #ifdef HAVE_PROCFS |
3322 | if (core_prpsinfo (abfd)) | |
3323 | { | |
3324 | prpsinfo_t *p = core_prpsinfo (abfd); | |
3325 | char *scan = p->pr_psargs; | |
3326 | while (*scan++) | |
3327 | {; | |
3328 | } | |
3329 | scan -= 2; | |
3330 | if ((scan > p->pr_psargs) && (*scan == ' ')) | |
3331 | { | |
3332 | *scan = '\000'; | |
3333 | } | |
3334 | return p->pr_psargs; | |
3335 | } | |
3336 | #endif | |
3337 | return NULL; | |
3338 | } | |
244ffee7 | 3339 | |
32090b8e KR |
3340 | /* Return the number of the signal that caused the core dump. Presumably, |
3341 | since we have a core file, we got a signal of some kind, so don't bother | |
3342 | checking the other process status fields, just return the signal number. | |
3343 | */ | |
244ffee7 | 3344 | |
32090b8e KR |
3345 | int |
3346 | DEFUN (elf_core_file_failing_signal, (abfd), | |
3347 | bfd * abfd) | |
3348 | { | |
3349 | #ifdef HAVE_PROCFS | |
3350 | if (core_prstatus (abfd)) | |
3351 | { | |
3352 | return ((prstatus_t *) (core_prstatus (abfd)))->pr_cursig; | |
3353 | } | |
3354 | #endif | |
3355 | return -1; | |
3356 | } | |
244ffee7 | 3357 | |
32090b8e KR |
3358 | /* Check to see if the core file could reasonably be expected to have |
3359 | come for the current executable file. Note that by default we return | |
3360 | true unless we find something that indicates that there might be a | |
3361 | problem. | |
3362 | */ | |
244ffee7 | 3363 | |
32090b8e KR |
3364 | boolean |
3365 | DEFUN (elf_core_file_matches_executable_p, (core_bfd, exec_bfd), | |
3366 | bfd * core_bfd AND | |
3367 | bfd * exec_bfd) | |
3368 | { | |
3369 | #ifdef HAVE_PROCFS | |
3370 | char *corename; | |
3371 | char *execname; | |
3372 | #endif | |
244ffee7 | 3373 | |
32090b8e KR |
3374 | /* First, xvecs must match since both are ELF files for the same target. */ |
3375 | ||
3376 | if (core_bfd->xvec != exec_bfd->xvec) | |
244ffee7 | 3377 | { |
d1ad85a6 | 3378 | bfd_set_error (bfd_error_system_call); |
244ffee7 JK |
3379 | return false; |
3380 | } | |
3381 | ||
32090b8e | 3382 | #ifdef HAVE_PROCFS |
244ffee7 | 3383 | |
32090b8e KR |
3384 | /* If no prpsinfo, just return true. Otherwise, grab the last component |
3385 | of the exec'd pathname from the prpsinfo. */ | |
244ffee7 | 3386 | |
32090b8e | 3387 | if (core_prpsinfo (core_bfd)) |
244ffee7 | 3388 | { |
32090b8e KR |
3389 | corename = (((struct prpsinfo *) core_prpsinfo (core_bfd))->pr_fname); |
3390 | } | |
3391 | else | |
3392 | { | |
3393 | return true; | |
3394 | } | |
244ffee7 | 3395 | |
32090b8e | 3396 | /* Find the last component of the executable pathname. */ |
244ffee7 | 3397 | |
32090b8e KR |
3398 | if ((execname = strrchr (exec_bfd->filename, '/')) != NULL) |
3399 | { | |
3400 | execname++; | |
3401 | } | |
3402 | else | |
3403 | { | |
3404 | execname = (char *) exec_bfd->filename; | |
3405 | } | |
244ffee7 | 3406 | |
32090b8e | 3407 | /* See if they match */ |
244ffee7 | 3408 | |
32090b8e | 3409 | return strcmp (execname, corename) ? false : true; |
244ffee7 | 3410 | |
32090b8e | 3411 | #else |
244ffee7 | 3412 | |
244ffee7 | 3413 | return true; |
244ffee7 | 3414 | |
32090b8e KR |
3415 | #endif /* HAVE_PROCFS */ |
3416 | } | |
244ffee7 | 3417 | |
32090b8e KR |
3418 | /* ELF core files contain a segment of type PT_NOTE, that holds much of |
3419 | the information that would normally be available from the /proc interface | |
3420 | for the process, at the time the process dumped core. Currently this | |
3421 | includes copies of the prstatus, prpsinfo, and fpregset structures. | |
244ffee7 | 3422 | |
32090b8e KR |
3423 | Since these structures are potentially machine dependent in size and |
3424 | ordering, bfd provides two levels of support for them. The first level, | |
3425 | available on all machines since it does not require that the host | |
3426 | have /proc support or the relevant include files, is to create a bfd | |
3427 | section for each of the prstatus, prpsinfo, and fpregset structures, | |
3428 | without any interpretation of their contents. With just this support, | |
3429 | the bfd client will have to interpret the structures itself. Even with | |
3430 | /proc support, it might want these full structures for it's own reasons. | |
244ffee7 | 3431 | |
32090b8e KR |
3432 | In the second level of support, where HAVE_PROCFS is defined, bfd will |
3433 | pick apart the structures to gather some additional information that | |
3434 | clients may want, such as the general register set, the name of the | |
3435 | exec'ed file and its arguments, the signal (if any) that caused the | |
3436 | core dump, etc. | |
244ffee7 | 3437 | |
32090b8e | 3438 | */ |
244ffee7 | 3439 | |
32090b8e KR |
3440 | static boolean |
3441 | DEFUN (elf_corefile_note, (abfd, hdr), | |
244ffee7 | 3442 | bfd * abfd AND |
32090b8e | 3443 | Elf_Internal_Phdr * hdr) |
244ffee7 | 3444 | { |
32090b8e KR |
3445 | Elf_External_Note *x_note_p; /* Elf note, external form */ |
3446 | Elf_Internal_Note i_note; /* Elf note, internal form */ | |
3447 | char *buf = NULL; /* Entire note segment contents */ | |
3448 | char *namedata; /* Name portion of the note */ | |
3449 | char *descdata; /* Descriptor portion of the note */ | |
3450 | char *sectname; /* Name to use for new section */ | |
3451 | long filepos; /* File offset to descriptor data */ | |
3452 | asection *newsect; | |
3453 | ||
3454 | if (hdr->p_filesz > 0 | |
b9d5cdf0 | 3455 | && (buf = (char *) malloc (hdr->p_filesz)) != NULL |
32090b8e KR |
3456 | && bfd_seek (abfd, hdr->p_offset, SEEK_SET) != -1 |
3457 | && bfd_read ((PTR) buf, hdr->p_filesz, 1, abfd) == hdr->p_filesz) | |
3458 | { | |
3459 | x_note_p = (Elf_External_Note *) buf; | |
3460 | while ((char *) x_note_p < (buf + hdr->p_filesz)) | |
3461 | { | |
3462 | i_note.namesz = bfd_h_get_32 (abfd, (bfd_byte *) x_note_p->namesz); | |
3463 | i_note.descsz = bfd_h_get_32 (abfd, (bfd_byte *) x_note_p->descsz); | |
3464 | i_note.type = bfd_h_get_32 (abfd, (bfd_byte *) x_note_p->type); | |
3465 | namedata = x_note_p->name; | |
3466 | descdata = namedata + BFD_ALIGN (i_note.namesz, 4); | |
3467 | filepos = hdr->p_offset + (descdata - buf); | |
3468 | switch (i_note.type) | |
3469 | { | |
3470 | case NT_PRSTATUS: | |
3471 | /* process descdata as prstatus info */ | |
3472 | bfd_prstatus (abfd, descdata, i_note.descsz, filepos); | |
3473 | sectname = ".prstatus"; | |
3474 | break; | |
3475 | case NT_FPREGSET: | |
3476 | /* process descdata as fpregset info */ | |
3477 | bfd_fpregset (abfd, descdata, i_note.descsz, filepos); | |
3478 | sectname = ".fpregset"; | |
3479 | break; | |
3480 | case NT_PRPSINFO: | |
3481 | /* process descdata as prpsinfo */ | |
3482 | bfd_prpsinfo (abfd, descdata, i_note.descsz, filepos); | |
3483 | sectname = ".prpsinfo"; | |
3484 | break; | |
3485 | default: | |
3486 | /* Unknown descriptor, just ignore it. */ | |
3487 | sectname = NULL; | |
3488 | break; | |
3489 | } | |
3490 | if (sectname != NULL) | |
3491 | { | |
3492 | newsect = bfd_make_section (abfd, sectname); | |
3493 | newsect->_raw_size = i_note.descsz; | |
3494 | newsect->filepos = filepos; | |
3495 | newsect->flags = SEC_ALLOC | SEC_HAS_CONTENTS; | |
3496 | newsect->alignment_power = 2; | |
3497 | } | |
3498 | x_note_p = (Elf_External_Note *) | |
3499 | (descdata + BFD_ALIGN (i_note.descsz, 4)); | |
3500 | } | |
3501 | } | |
3502 | if (buf != NULL) | |
3503 | { | |
3504 | free (buf); | |
3505 | } | |
b9d5cdf0 DM |
3506 | else if (hdr->p_filesz > 0) |
3507 | { | |
d1ad85a6 | 3508 | bfd_set_error (bfd_error_no_memory); |
b9d5cdf0 DM |
3509 | return false; |
3510 | } | |
32090b8e | 3511 | return true; |
244ffee7 | 3512 | |
244ffee7 JK |
3513 | } |
3514 | ||
32090b8e KR |
3515 | /* Core files are simply standard ELF formatted files that partition |
3516 | the file using the execution view of the file (program header table) | |
3517 | rather than the linking view. In fact, there is no section header | |
3518 | table in a core file. | |
3519 | ||
3520 | The process status information (including the contents of the general | |
3521 | register set) and the floating point register set are stored in a | |
3522 | segment of type PT_NOTE. We handcraft a couple of extra bfd sections | |
3523 | that allow standard bfd access to the general registers (.reg) and the | |
3524 | floating point registers (.reg2). | |
3525 | ||
3526 | */ | |
3527 | ||
3528 | bfd_target * | |
3529 | DEFUN (elf_core_file_p, (abfd), bfd * abfd) | |
244ffee7 | 3530 | { |
32090b8e KR |
3531 | Elf_External_Ehdr x_ehdr; /* Elf file header, external form */ |
3532 | Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */ | |
3533 | Elf_External_Phdr x_phdr; /* Program header table entry, external form */ | |
3534 | Elf_Internal_Phdr *i_phdrp; /* Program header table, internal form */ | |
3535 | unsigned int phindex; | |
244ffee7 | 3536 | |
32090b8e KR |
3537 | /* Read in the ELF header in external format. */ |
3538 | ||
3539 | if (bfd_read ((PTR) & x_ehdr, sizeof (x_ehdr), 1, abfd) != sizeof (x_ehdr)) | |
244ffee7 | 3540 | { |
d1ad85a6 | 3541 | bfd_set_error (bfd_error_system_call); |
244ffee7 JK |
3542 | return NULL; |
3543 | } | |
32090b8e KR |
3544 | |
3545 | /* Now check to see if we have a valid ELF file, and one that BFD can | |
3546 | make use of. The magic number must match, the address size ('class') | |
3547 | and byte-swapping must match our XVEC entry, and it must have a | |
3548 | program header table (FIXME: See comments re segments at top of this | |
3549 | file). */ | |
3550 | ||
3551 | if (elf_file_p (&x_ehdr) == false) | |
244ffee7 | 3552 | { |
32090b8e | 3553 | wrong: |
d1ad85a6 | 3554 | bfd_set_error (bfd_error_wrong_format); |
32090b8e | 3555 | return NULL; |
244ffee7 | 3556 | } |
244ffee7 | 3557 | |
32090b8e | 3558 | /* FIXME, Check EI_VERSION here ! */ |
244ffee7 | 3559 | |
32090b8e KR |
3560 | { |
3561 | #if ARCH_SIZE == 32 | |
3562 | int desired_address_size = ELFCLASS32; | |
3563 | #endif | |
3564 | #if ARCH_SIZE == 64 | |
3565 | int desired_address_size = ELFCLASS64; | |
3566 | #endif | |
3567 | ||
3568 | if (x_ehdr.e_ident[EI_CLASS] != desired_address_size) | |
3569 | goto wrong; | |
3570 | } | |
3571 | ||
3572 | /* Switch xvec to match the specified byte order. */ | |
3573 | switch (x_ehdr.e_ident[EI_DATA]) | |
244ffee7 | 3574 | { |
32090b8e KR |
3575 | case ELFDATA2MSB: /* Big-endian */ |
3576 | if (abfd->xvec->byteorder_big_p == false) | |
3577 | goto wrong; | |
244ffee7 | 3578 | break; |
32090b8e KR |
3579 | case ELFDATA2LSB: /* Little-endian */ |
3580 | if (abfd->xvec->byteorder_big_p == true) | |
3581 | goto wrong; | |
244ffee7 | 3582 | break; |
32090b8e KR |
3583 | case ELFDATANONE: /* No data encoding specified */ |
3584 | default: /* Unknown data encoding specified */ | |
3585 | goto wrong; | |
244ffee7 JK |
3586 | } |
3587 | ||
32090b8e KR |
3588 | /* Allocate an instance of the elf_obj_tdata structure and hook it up to |
3589 | the tdata pointer in the bfd. */ | |
244ffee7 | 3590 | |
32090b8e KR |
3591 | elf_tdata (abfd) = |
3592 | (struct elf_obj_tdata *) bfd_zalloc (abfd, sizeof (struct elf_obj_tdata)); | |
3593 | if (elf_tdata (abfd) == NULL) | |
244ffee7 | 3594 | { |
d1ad85a6 | 3595 | bfd_set_error (bfd_error_no_memory); |
32090b8e | 3596 | return NULL; |
244ffee7 | 3597 | } |
244ffee7 | 3598 | |
32090b8e | 3599 | /* FIXME, `wrong' returns from this point onward, leak memory. */ |
244ffee7 | 3600 | |
32090b8e KR |
3601 | /* Now that we know the byte order, swap in the rest of the header */ |
3602 | i_ehdrp = elf_elfheader (abfd); | |
3603 | elf_swap_ehdr_in (abfd, &x_ehdr, i_ehdrp); | |
3604 | #if DEBUG & 1 | |
3605 | elf_debug_file (i_ehdrp); | |
3606 | #endif | |
244ffee7 | 3607 | |
32090b8e KR |
3608 | /* If there is no program header, or the type is not a core file, then |
3609 | we are hosed. */ | |
3610 | if (i_ehdrp->e_phoff == 0 || i_ehdrp->e_type != ET_CORE) | |
3611 | goto wrong; | |
244ffee7 | 3612 | |
32090b8e KR |
3613 | /* Allocate space for a copy of the program header table in |
3614 | internal form, seek to the program header table in the file, | |
3615 | read it in, and convert it to internal form. As a simple sanity | |
3616 | check, verify that the what BFD thinks is the size of each program | |
3617 | header table entry actually matches the size recorded in the file. */ | |
3618 | ||
3619 | if (i_ehdrp->e_phentsize != sizeof (x_phdr)) | |
3620 | goto wrong; | |
3621 | i_phdrp = (Elf_Internal_Phdr *) | |
3622 | bfd_alloc (abfd, sizeof (*i_phdrp) * i_ehdrp->e_phnum); | |
3623 | if (!i_phdrp) | |
244ffee7 | 3624 | { |
d1ad85a6 | 3625 | bfd_set_error (bfd_error_no_memory); |
32090b8e KR |
3626 | return NULL; |
3627 | } | |
3628 | if (bfd_seek (abfd, i_ehdrp->e_phoff, SEEK_SET) == -1) | |
3629 | { | |
d1ad85a6 | 3630 | bfd_set_error (bfd_error_system_call); |
32090b8e KR |
3631 | return NULL; |
3632 | } | |
3633 | for (phindex = 0; phindex < i_ehdrp->e_phnum; phindex++) | |
3634 | { | |
3635 | if (bfd_read ((PTR) & x_phdr, sizeof (x_phdr), 1, abfd) | |
3636 | != sizeof (x_phdr)) | |
3637 | { | |
d1ad85a6 | 3638 | bfd_set_error (bfd_error_system_call); |
32090b8e KR |
3639 | return NULL; |
3640 | } | |
3641 | elf_swap_phdr_in (abfd, &x_phdr, i_phdrp + phindex); | |
244ffee7 JK |
3642 | } |
3643 | ||
32090b8e KR |
3644 | /* Once all of the program headers have been read and converted, we |
3645 | can start processing them. */ | |
244ffee7 | 3646 | |
32090b8e KR |
3647 | for (phindex = 0; phindex < i_ehdrp->e_phnum; phindex++) |
3648 | { | |
3649 | bfd_section_from_phdr (abfd, i_phdrp + phindex, phindex); | |
3650 | if ((i_phdrp + phindex)->p_type == PT_NOTE) | |
3651 | { | |
3652 | elf_corefile_note (abfd, i_phdrp + phindex); | |
3653 | } | |
3654 | } | |
244ffee7 | 3655 | |
32090b8e | 3656 | /* Remember the entry point specified in the ELF file header. */ |
244ffee7 | 3657 | |
32090b8e | 3658 | bfd_get_start_address (abfd) = i_ehdrp->e_entry; |
244ffee7 | 3659 | |
32090b8e | 3660 | return abfd->xvec; |
244ffee7 | 3661 | } |