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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 JK |
61 | |
62 | #include <string.h> /* For strrchr and friends */ | |
63 | #include "bfd.h" | |
64 | #include "sysdep.h" | |
6ec3bb6a | 65 | #include "bfdlink.h" |
244ffee7 JK |
66 | #include "libbfd.h" |
67 | #include "libelf.h" | |
68 | ||
32090b8e | 69 | /* Renaming structures, typedefs, macros and functions to be size-specific. */ |
244ffee7 | 70 | #define Elf_External_Ehdr NAME(Elf,External_Ehdr) |
244ffee7 | 71 | #define Elf_External_Sym NAME(Elf,External_Sym) |
244ffee7 | 72 | #define Elf_External_Shdr NAME(Elf,External_Shdr) |
244ffee7 | 73 | #define Elf_External_Phdr NAME(Elf,External_Phdr) |
244ffee7 JK |
74 | #define Elf_External_Rel NAME(Elf,External_Rel) |
75 | #define Elf_External_Rela NAME(Elf,External_Rela) | |
013dec1a | 76 | #define Elf_External_Dyn NAME(Elf,External_Dyn) |
244ffee7 | 77 | |
244ffee7 JK |
78 | #define elf_core_file_failing_command NAME(bfd_elf,core_file_failing_command) |
79 | #define elf_core_file_failing_signal NAME(bfd_elf,core_file_failing_signal) | |
cb71adf1 PS |
80 | #define elf_core_file_matches_executable_p \ |
81 | NAME(bfd_elf,core_file_matches_executable_p) | |
244ffee7 JK |
82 | #define elf_object_p NAME(bfd_elf,object_p) |
83 | #define elf_core_file_p NAME(bfd_elf,core_file_p) | |
244ffee7 | 84 | #define elf_get_symtab_upper_bound NAME(bfd_elf,get_symtab_upper_bound) |
cb71adf1 PS |
85 | #define elf_get_dynamic_symtab_upper_bound \ |
86 | NAME(bfd_elf,get_dynamic_symtab_upper_bound) | |
013dec1a ILT |
87 | #define elf_swap_reloc_in NAME(bfd_elf,swap_reloc_in) |
88 | #define elf_swap_reloca_in NAME(bfd_elf,swap_reloca_in) | |
89 | #define elf_swap_reloc_out NAME(bfd_elf,swap_reloc_out) | |
90 | #define elf_swap_reloca_out NAME(bfd_elf,swap_reloca_out) | |
91 | #define elf_swap_dyn_in NAME(bfd_elf,swap_dyn_in) | |
92 | #define elf_swap_dyn_out NAME(bfd_elf,swap_dyn_out) | |
244ffee7 JK |
93 | #define elf_get_reloc_upper_bound NAME(bfd_elf,get_reloc_upper_bound) |
94 | #define elf_canonicalize_reloc NAME(bfd_elf,canonicalize_reloc) | |
95 | #define elf_get_symtab NAME(bfd_elf,get_symtab) | |
cb71adf1 PS |
96 | #define elf_canonicalize_dynamic_symtab \ |
97 | NAME(bfd_elf,canonicalize_dynamic_symtab) | |
244ffee7 JK |
98 | #define elf_make_empty_symbol NAME(bfd_elf,make_empty_symbol) |
99 | #define elf_get_symbol_info NAME(bfd_elf,get_symbol_info) | |
100 | #define elf_print_symbol NAME(bfd_elf,print_symbol) | |
101 | #define elf_get_lineno NAME(bfd_elf,get_lineno) | |
102 | #define elf_set_arch_mach NAME(bfd_elf,set_arch_mach) | |
103 | #define elf_find_nearest_line NAME(bfd_elf,find_nearest_line) | |
104 | #define elf_sizeof_headers NAME(bfd_elf,sizeof_headers) | |
105 | #define elf_set_section_contents NAME(bfd_elf,set_section_contents) | |
106 | #define elf_no_info_to_howto NAME(bfd_elf,no_info_to_howto) | |
107 | #define elf_no_info_to_howto_rel NAME(bfd_elf,no_info_to_howto_rel) | |
fce36137 | 108 | #define elf_new_section_hook NAME(bfd_elf,new_section_hook) |
32090b8e | 109 | #define write_relocs NAME(bfd_elf,_write_relocs) |
f035cc47 | 110 | #define elf_find_section NAME(bfd_elf,find_section) |
6ec3bb6a | 111 | #define elf_bfd_link_add_symbols NAME(bfd_elf,bfd_link_add_symbols) |
013dec1a | 112 | #define elf_add_dynamic_entry NAME(bfd_elf,add_dynamic_entry) |
6ec3bb6a | 113 | #define elf_bfd_final_link NAME(bfd_elf,bfd_final_link) |
244ffee7 | 114 | |
6a3eb9b6 KR |
115 | #if ARCH_SIZE == 64 |
116 | #define ELF_R_INFO(X,Y) ELF64_R_INFO(X,Y) | |
117 | #define ELF_R_SYM(X) ELF64_R_SYM(X) | |
6ec3bb6a | 118 | #define ELF_R_TYPE(X) ELF64_R_TYPE(X) |
32090b8e | 119 | #define ELFCLASS ELFCLASS64 |
f035cc47 | 120 | #define FILE_ALIGN 8 |
013dec1a | 121 | #define LOG_FILE_ALIGN 3 |
6a3eb9b6 KR |
122 | #endif |
123 | #if ARCH_SIZE == 32 | |
124 | #define ELF_R_INFO(X,Y) ELF32_R_INFO(X,Y) | |
125 | #define ELF_R_SYM(X) ELF32_R_SYM(X) | |
6ec3bb6a | 126 | #define ELF_R_TYPE(X) ELF32_R_TYPE(X) |
32090b8e | 127 | #define ELFCLASS ELFCLASS32 |
f035cc47 | 128 | #define FILE_ALIGN 4 |
013dec1a | 129 | #define LOG_FILE_ALIGN 2 |
244ffee7 JK |
130 | #endif |
131 | ||
244ffee7 JK |
132 | /* Forward declarations of static functions */ |
133 | ||
6ec3bb6a ILT |
134 | static unsigned long bfd_add_to_strtab |
135 | PARAMS ((bfd *, struct strtab *, const char *)); | |
2e03ce18 | 136 | static asection *section_from_elf_index PARAMS ((bfd *, unsigned int)); |
244ffee7 JK |
137 | |
138 | static int elf_section_from_bfd_section PARAMS ((bfd *, struct sec *)); | |
139 | ||
cb71adf1 | 140 | static long elf_slurp_symbol_table PARAMS ((bfd *, asymbol **, boolean)); |
244ffee7 | 141 | |
244ffee7 | 142 | static int elf_symbol_from_bfd_symbol PARAMS ((bfd *, |
1c6042ee | 143 | struct symbol_cache_entry **)); |
244ffee7 | 144 | |
6ec3bb6a ILT |
145 | static boolean elf_compute_section_file_positions |
146 | PARAMS ((bfd *, struct bfd_link_info *)); | |
147 | static boolean prep_headers PARAMS ((bfd *)); | |
fa15568a | 148 | static void elf_fake_sections PARAMS ((bfd *, asection *, PTR)); |
6ec3bb6a | 149 | static boolean assign_section_numbers PARAMS ((bfd *)); |
013dec1a ILT |
150 | static file_ptr align_file_position PARAMS ((file_ptr)); |
151 | static file_ptr assign_file_position_for_section | |
152 | PARAMS ((Elf_Internal_Shdr *, file_ptr, boolean)); | |
6ec3bb6a | 153 | static boolean assign_file_positions_except_relocs PARAMS ((bfd *, boolean)); |
013dec1a ILT |
154 | static void assign_file_positions_for_relocs PARAMS ((bfd *)); |
155 | static bfd_size_type get_program_header_size PARAMS ((bfd *)); | |
156 | static file_ptr map_program_segments | |
157 | PARAMS ((bfd *, file_ptr, Elf_Internal_Shdr *, bfd_size_type)); | |
6ec3bb6a | 158 | |
9783e04a | 159 | static boolean elf_map_symbols PARAMS ((bfd *)); |
b9d5cdf0 | 160 | static boolean swap_out_syms PARAMS ((bfd *)); |
244ffee7 | 161 | |
2e03ce18 ILT |
162 | static boolean bfd_section_from_shdr PARAMS ((bfd *, unsigned int shindex)); |
163 | ||
6a3eb9b6 KR |
164 | #ifdef DEBUG |
165 | static void elf_debug_section PARAMS ((char *, int, Elf_Internal_Shdr *)); | |
166 | static void elf_debug_file PARAMS ((Elf_Internal_Ehdr *)); | |
167 | #endif | |
238ac6ec | 168 | |
32090b8e KR |
169 | #define elf_string_from_elf_strtab(abfd,strindex) \ |
170 | elf_string_from_elf_section(abfd,elf_elfheader(abfd)->e_shstrndx,strindex) | |
32090b8e | 171 | \f |
1c6042ee | 172 | |
32090b8e KR |
173 | /* Structure swapping routines */ |
174 | ||
6a3eb9b6 KR |
175 | /* Should perhaps use put_offset, put_word, etc. For now, the two versions |
176 | can be handled by explicitly specifying 32 bits or "the long type". */ | |
238ac6ec KR |
177 | #if ARCH_SIZE == 64 |
178 | #define put_word bfd_h_put_64 | |
179 | #define get_word bfd_h_get_64 | |
180 | #endif | |
181 | #if ARCH_SIZE == 32 | |
182 | #define put_word bfd_h_put_32 | |
183 | #define get_word bfd_h_get_32 | |
184 | #endif | |
185 | ||
244ffee7 JK |
186 | /* Translate an ELF symbol in external format into an ELF symbol in internal |
187 | format. */ | |
188 | ||
189 | static void | |
1c6042ee ILT |
190 | elf_swap_symbol_in (abfd, src, dst) |
191 | bfd *abfd; | |
192 | Elf_External_Sym *src; | |
193 | Elf_Internal_Sym *dst; | |
244ffee7 JK |
194 | { |
195 | dst->st_name = bfd_h_get_32 (abfd, (bfd_byte *) src->st_name); | |
238ac6ec KR |
196 | dst->st_value = get_word (abfd, (bfd_byte *) src->st_value); |
197 | dst->st_size = get_word (abfd, (bfd_byte *) src->st_size); | |
244ffee7 JK |
198 | dst->st_info = bfd_h_get_8 (abfd, (bfd_byte *) src->st_info); |
199 | dst->st_other = bfd_h_get_8 (abfd, (bfd_byte *) src->st_other); | |
200 | dst->st_shndx = bfd_h_get_16 (abfd, (bfd_byte *) src->st_shndx); | |
201 | } | |
202 | ||
203 | /* Translate an ELF symbol in internal format into an ELF symbol in external | |
204 | format. */ | |
205 | ||
206 | static void | |
1c6042ee ILT |
207 | elf_swap_symbol_out (abfd, src, dst) |
208 | bfd *abfd; | |
209 | Elf_Internal_Sym *src; | |
210 | Elf_External_Sym *dst; | |
244ffee7 JK |
211 | { |
212 | bfd_h_put_32 (abfd, src->st_name, dst->st_name); | |
238ac6ec KR |
213 | put_word (abfd, src->st_value, dst->st_value); |
214 | put_word (abfd, src->st_size, dst->st_size); | |
244ffee7 JK |
215 | bfd_h_put_8 (abfd, src->st_info, dst->st_info); |
216 | bfd_h_put_8 (abfd, src->st_other, dst->st_other); | |
217 | bfd_h_put_16 (abfd, src->st_shndx, dst->st_shndx); | |
218 | } | |
219 | ||
220 | ||
221 | /* Translate an ELF file header in external format into an ELF file header in | |
222 | internal format. */ | |
223 | ||
224 | static void | |
1c6042ee ILT |
225 | elf_swap_ehdr_in (abfd, src, dst) |
226 | bfd *abfd; | |
227 | Elf_External_Ehdr *src; | |
228 | Elf_Internal_Ehdr *dst; | |
244ffee7 JK |
229 | { |
230 | memcpy (dst->e_ident, src->e_ident, EI_NIDENT); | |
231 | dst->e_type = bfd_h_get_16 (abfd, (bfd_byte *) src->e_type); | |
232 | dst->e_machine = bfd_h_get_16 (abfd, (bfd_byte *) src->e_machine); | |
233 | dst->e_version = bfd_h_get_32 (abfd, (bfd_byte *) src->e_version); | |
238ac6ec KR |
234 | dst->e_entry = get_word (abfd, (bfd_byte *) src->e_entry); |
235 | dst->e_phoff = get_word (abfd, (bfd_byte *) src->e_phoff); | |
236 | dst->e_shoff = get_word (abfd, (bfd_byte *) src->e_shoff); | |
244ffee7 JK |
237 | dst->e_flags = bfd_h_get_32 (abfd, (bfd_byte *) src->e_flags); |
238 | dst->e_ehsize = bfd_h_get_16 (abfd, (bfd_byte *) src->e_ehsize); | |
239 | dst->e_phentsize = bfd_h_get_16 (abfd, (bfd_byte *) src->e_phentsize); | |
240 | dst->e_phnum = bfd_h_get_16 (abfd, (bfd_byte *) src->e_phnum); | |
241 | dst->e_shentsize = bfd_h_get_16 (abfd, (bfd_byte *) src->e_shentsize); | |
242 | dst->e_shnum = bfd_h_get_16 (abfd, (bfd_byte *) src->e_shnum); | |
243 | dst->e_shstrndx = bfd_h_get_16 (abfd, (bfd_byte *) src->e_shstrndx); | |
244 | } | |
245 | ||
246 | /* Translate an ELF file header in internal format into an ELF file header in | |
247 | external format. */ | |
248 | ||
249 | static void | |
1c6042ee ILT |
250 | elf_swap_ehdr_out (abfd, src, dst) |
251 | bfd *abfd; | |
252 | Elf_Internal_Ehdr *src; | |
253 | Elf_External_Ehdr *dst; | |
244ffee7 JK |
254 | { |
255 | memcpy (dst->e_ident, src->e_ident, EI_NIDENT); | |
256 | /* note that all elements of dst are *arrays of unsigned char* already... */ | |
257 | bfd_h_put_16 (abfd, src->e_type, dst->e_type); | |
258 | bfd_h_put_16 (abfd, src->e_machine, dst->e_machine); | |
259 | bfd_h_put_32 (abfd, src->e_version, dst->e_version); | |
238ac6ec KR |
260 | put_word (abfd, src->e_entry, dst->e_entry); |
261 | put_word (abfd, src->e_phoff, dst->e_phoff); | |
262 | put_word (abfd, src->e_shoff, dst->e_shoff); | |
244ffee7 JK |
263 | bfd_h_put_32 (abfd, src->e_flags, dst->e_flags); |
264 | bfd_h_put_16 (abfd, src->e_ehsize, dst->e_ehsize); | |
265 | bfd_h_put_16 (abfd, src->e_phentsize, dst->e_phentsize); | |
266 | bfd_h_put_16 (abfd, src->e_phnum, dst->e_phnum); | |
267 | bfd_h_put_16 (abfd, src->e_shentsize, dst->e_shentsize); | |
268 | bfd_h_put_16 (abfd, src->e_shnum, dst->e_shnum); | |
269 | bfd_h_put_16 (abfd, src->e_shstrndx, dst->e_shstrndx); | |
270 | } | |
271 | ||
272 | ||
273 | /* Translate an ELF section header table entry in external format into an | |
274 | ELF section header table entry in internal format. */ | |
275 | ||
276 | static void | |
1c6042ee ILT |
277 | elf_swap_shdr_in (abfd, src, dst) |
278 | bfd *abfd; | |
279 | Elf_External_Shdr *src; | |
280 | Elf_Internal_Shdr *dst; | |
244ffee7 JK |
281 | { |
282 | dst->sh_name = bfd_h_get_32 (abfd, (bfd_byte *) src->sh_name); | |
283 | dst->sh_type = bfd_h_get_32 (abfd, (bfd_byte *) src->sh_type); | |
238ac6ec KR |
284 | dst->sh_flags = get_word (abfd, (bfd_byte *) src->sh_flags); |
285 | dst->sh_addr = get_word (abfd, (bfd_byte *) src->sh_addr); | |
286 | dst->sh_offset = get_word (abfd, (bfd_byte *) src->sh_offset); | |
287 | dst->sh_size = get_word (abfd, (bfd_byte *) src->sh_size); | |
244ffee7 JK |
288 | dst->sh_link = bfd_h_get_32 (abfd, (bfd_byte *) src->sh_link); |
289 | dst->sh_info = bfd_h_get_32 (abfd, (bfd_byte *) src->sh_info); | |
238ac6ec KR |
290 | dst->sh_addralign = get_word (abfd, (bfd_byte *) src->sh_addralign); |
291 | dst->sh_entsize = get_word (abfd, (bfd_byte *) src->sh_entsize); | |
244ffee7 JK |
292 | /* we haven't done any processing on it yet, so... */ |
293 | dst->rawdata = (void *) 0; | |
294 | } | |
295 | ||
296 | /* Translate an ELF section header table entry in internal format into an | |
297 | ELF section header table entry in external format. */ | |
298 | ||
299 | static void | |
1c6042ee ILT |
300 | elf_swap_shdr_out (abfd, src, dst) |
301 | bfd *abfd; | |
302 | Elf_Internal_Shdr *src; | |
303 | Elf_External_Shdr *dst; | |
244ffee7 JK |
304 | { |
305 | /* note that all elements of dst are *arrays of unsigned char* already... */ | |
306 | bfd_h_put_32 (abfd, src->sh_name, dst->sh_name); | |
307 | bfd_h_put_32 (abfd, src->sh_type, dst->sh_type); | |
238ac6ec KR |
308 | put_word (abfd, src->sh_flags, dst->sh_flags); |
309 | put_word (abfd, src->sh_addr, dst->sh_addr); | |
310 | put_word (abfd, src->sh_offset, dst->sh_offset); | |
311 | put_word (abfd, src->sh_size, dst->sh_size); | |
244ffee7 JK |
312 | bfd_h_put_32 (abfd, src->sh_link, dst->sh_link); |
313 | bfd_h_put_32 (abfd, src->sh_info, dst->sh_info); | |
238ac6ec KR |
314 | put_word (abfd, src->sh_addralign, dst->sh_addralign); |
315 | put_word (abfd, src->sh_entsize, dst->sh_entsize); | |
244ffee7 JK |
316 | } |
317 | ||
318 | ||
319 | /* Translate an ELF program header table entry in external format into an | |
320 | ELF program header table entry in internal format. */ | |
321 | ||
322 | static void | |
1c6042ee ILT |
323 | elf_swap_phdr_in (abfd, src, dst) |
324 | bfd *abfd; | |
325 | Elf_External_Phdr *src; | |
326 | Elf_Internal_Phdr *dst; | |
244ffee7 JK |
327 | { |
328 | dst->p_type = bfd_h_get_32 (abfd, (bfd_byte *) src->p_type); | |
244ffee7 | 329 | dst->p_flags = bfd_h_get_32 (abfd, (bfd_byte *) src->p_flags); |
238ac6ec KR |
330 | dst->p_offset = get_word (abfd, (bfd_byte *) src->p_offset); |
331 | dst->p_vaddr = get_word (abfd, (bfd_byte *) src->p_vaddr); | |
332 | dst->p_paddr = get_word (abfd, (bfd_byte *) src->p_paddr); | |
333 | dst->p_filesz = get_word (abfd, (bfd_byte *) src->p_filesz); | |
334 | dst->p_memsz = get_word (abfd, (bfd_byte *) src->p_memsz); | |
335 | dst->p_align = get_word (abfd, (bfd_byte *) src->p_align); | |
244ffee7 JK |
336 | } |
337 | ||
244ffee7 | 338 | static void |
1c6042ee ILT |
339 | elf_swap_phdr_out (abfd, src, dst) |
340 | bfd *abfd; | |
341 | Elf_Internal_Phdr *src; | |
342 | Elf_External_Phdr *dst; | |
244ffee7 JK |
343 | { |
344 | /* note that all elements of dst are *arrays of unsigned char* already... */ | |
345 | bfd_h_put_32 (abfd, src->p_type, dst->p_type); | |
94dbb655 KR |
346 | put_word (abfd, src->p_offset, dst->p_offset); |
347 | put_word (abfd, src->p_vaddr, dst->p_vaddr); | |
348 | put_word (abfd, src->p_paddr, dst->p_paddr); | |
349 | put_word (abfd, src->p_filesz, dst->p_filesz); | |
350 | put_word (abfd, src->p_memsz, dst->p_memsz); | |
244ffee7 | 351 | bfd_h_put_32 (abfd, src->p_flags, dst->p_flags); |
94dbb655 | 352 | put_word (abfd, src->p_align, dst->p_align); |
244ffee7 JK |
353 | } |
354 | ||
355 | /* Translate an ELF reloc from external format to internal format. */ | |
013dec1a | 356 | INLINE void |
1c6042ee ILT |
357 | elf_swap_reloc_in (abfd, src, dst) |
358 | bfd *abfd; | |
359 | Elf_External_Rel *src; | |
360 | Elf_Internal_Rel *dst; | |
244ffee7 | 361 | { |
94dbb655 KR |
362 | dst->r_offset = get_word (abfd, (bfd_byte *) src->r_offset); |
363 | dst->r_info = get_word (abfd, (bfd_byte *) src->r_info); | |
244ffee7 JK |
364 | } |
365 | ||
013dec1a | 366 | INLINE void |
1c6042ee ILT |
367 | elf_swap_reloca_in (abfd, src, dst) |
368 | bfd *abfd; | |
369 | Elf_External_Rela *src; | |
370 | Elf_Internal_Rela *dst; | |
244ffee7 | 371 | { |
94dbb655 KR |
372 | dst->r_offset = get_word (abfd, (bfd_byte *) src->r_offset); |
373 | dst->r_info = get_word (abfd, (bfd_byte *) src->r_info); | |
374 | dst->r_addend = get_word (abfd, (bfd_byte *) src->r_addend); | |
244ffee7 JK |
375 | } |
376 | ||
377 | /* Translate an ELF reloc from internal format to external format. */ | |
013dec1a | 378 | INLINE void |
1c6042ee ILT |
379 | elf_swap_reloc_out (abfd, src, dst) |
380 | bfd *abfd; | |
381 | Elf_Internal_Rel *src; | |
382 | Elf_External_Rel *dst; | |
244ffee7 | 383 | { |
94dbb655 KR |
384 | put_word (abfd, src->r_offset, dst->r_offset); |
385 | put_word (abfd, src->r_info, dst->r_info); | |
244ffee7 JK |
386 | } |
387 | ||
013dec1a | 388 | INLINE void |
1c6042ee ILT |
389 | elf_swap_reloca_out (abfd, src, dst) |
390 | bfd *abfd; | |
391 | Elf_Internal_Rela *src; | |
392 | Elf_External_Rela *dst; | |
244ffee7 | 393 | { |
94dbb655 KR |
394 | put_word (abfd, src->r_offset, dst->r_offset); |
395 | put_word (abfd, src->r_info, dst->r_info); | |
396 | put_word (abfd, src->r_addend, dst->r_addend); | |
244ffee7 | 397 | } |
32090b8e | 398 | |
013dec1a ILT |
399 | INLINE void |
400 | elf_swap_dyn_in (abfd, src, dst) | |
401 | bfd *abfd; | |
402 | const Elf_External_Dyn *src; | |
403 | Elf_Internal_Dyn *dst; | |
404 | { | |
405 | dst->d_tag = get_word (abfd, src->d_tag); | |
406 | dst->d_un.d_val = get_word (abfd, src->d_un.d_val); | |
407 | } | |
1c6042ee | 408 | |
013dec1a ILT |
409 | INLINE void |
410 | elf_swap_dyn_out (abfd, src, dst) | |
411 | bfd *abfd; | |
412 | const Elf_Internal_Dyn *src; | |
413 | Elf_External_Dyn *dst; | |
414 | { | |
415 | put_word (abfd, src->d_tag, dst->d_tag); | |
416 | put_word (abfd, src->d_un.d_val, dst->d_un.d_val); | |
417 | } | |
418 | \f | |
32090b8e KR |
419 | /* String table creation/manipulation routines */ |
420 | ||
421 | static struct strtab * | |
1c6042ee ILT |
422 | bfd_new_strtab (abfd) |
423 | bfd *abfd; | |
32090b8e KR |
424 | { |
425 | struct strtab *ss; | |
426 | ||
b9d5cdf0 DM |
427 | ss = (struct strtab *) malloc (sizeof (struct strtab)); |
428 | if (!ss) | |
429 | { | |
d1ad85a6 | 430 | bfd_set_error (bfd_error_no_memory); |
b9d5cdf0 DM |
431 | return NULL; |
432 | } | |
433 | ss->tab = malloc (1); | |
434 | if (!ss->tab) | |
435 | { | |
d1ad85a6 | 436 | bfd_set_error (bfd_error_no_memory); |
b9d5cdf0 DM |
437 | return NULL; |
438 | } | |
32090b8e KR |
439 | *ss->tab = 0; |
440 | ss->nentries = 0; | |
441 | ss->length = 1; | |
244ffee7 | 442 | |
32090b8e KR |
443 | return ss; |
444 | } | |
445 | ||
6ec3bb6a | 446 | static unsigned long |
1c6042ee ILT |
447 | bfd_add_to_strtab (abfd, ss, str) |
448 | bfd *abfd; | |
449 | struct strtab *ss; | |
6ec3bb6a | 450 | const char *str; |
32090b8e KR |
451 | { |
452 | /* should search first, but for now: */ | |
453 | /* include the trailing NUL */ | |
454 | int ln = strlen (str) + 1; | |
455 | ||
6ec3bb6a ILT |
456 | /* FIXME: This is slow. Also, we could combine this with the a.out |
457 | string table building and use a hash table, although it might not | |
458 | be worth it since ELF symbols don't include debugging information | |
459 | and thus have much less overlap. */ | |
32090b8e | 460 | ss->tab = realloc (ss->tab, ss->length + ln); |
6ec3bb6a ILT |
461 | if (ss->tab == NULL) |
462 | { | |
463 | bfd_set_error (bfd_error_no_memory); | |
464 | return (unsigned long) -1; | |
465 | } | |
32090b8e | 466 | |
32090b8e KR |
467 | strcpy (ss->tab + ss->length, str); |
468 | ss->nentries++; | |
469 | ss->length += ln; | |
470 | ||
471 | return ss->length - ln; | |
472 | } | |
473 | ||
474 | static int | |
1c6042ee ILT |
475 | bfd_add_2_to_strtab (abfd, ss, str, str2) |
476 | bfd *abfd; | |
477 | struct strtab *ss; | |
478 | char *str; | |
479 | CONST char *str2; | |
244ffee7 | 480 | { |
32090b8e KR |
481 | /* should search first, but for now: */ |
482 | /* include the trailing NUL */ | |
483 | int ln = strlen (str) + strlen (str2) + 1; | |
484 | ||
485 | /* should this be using obstacks? */ | |
486 | if (ss->length) | |
487 | ss->tab = realloc (ss->tab, ss->length + ln); | |
488 | else | |
b9d5cdf0 | 489 | ss->tab = malloc (ln); |
32090b8e | 490 | |
9783e04a | 491 | BFD_ASSERT (ss->tab != 0); /* FIXME */ |
32090b8e KR |
492 | strcpy (ss->tab + ss->length, str); |
493 | strcpy (ss->tab + ss->length + strlen (str), str2); | |
494 | ss->nentries++; | |
495 | ss->length += ln; | |
496 | ||
497 | return ss->length - ln; | |
244ffee7 | 498 | } |
32090b8e KR |
499 | \f |
500 | /* ELF .o/exec file reading */ | |
501 | ||
502 | /* Create a new bfd section from an ELF section header. */ | |
503 | ||
244ffee7 | 504 | static boolean |
1c6042ee ILT |
505 | bfd_section_from_shdr (abfd, shindex) |
506 | bfd *abfd; | |
507 | unsigned int shindex; | |
244ffee7 | 508 | { |
32090b8e KR |
509 | Elf_Internal_Shdr *hdr = elf_elfsections (abfd)[shindex]; |
510 | Elf_Internal_Ehdr *ehdr = elf_elfheader (abfd); | |
244ffee7 JK |
511 | char *name; |
512 | ||
513 | name = elf_string_from_elf_strtab (abfd, hdr->sh_name); | |
514 | ||
515 | switch (hdr->sh_type) | |
516 | { | |
244ffee7 | 517 | case SHT_NULL: |
497c5434 | 518 | /* Inactive section. Throw it away. */ |
244ffee7 JK |
519 | return true; |
520 | ||
497c5434 ILT |
521 | case SHT_PROGBITS: /* Normal section with contents. */ |
522 | case SHT_DYNAMIC: /* Dynamic linking information. */ | |
523 | case SHT_NOBITS: /* .bss section. */ | |
fa15568a | 524 | case SHT_HASH: /* .hash section. */ |
497c5434 | 525 | return _bfd_elf_make_section_from_shdr (abfd, hdr, name); |
244ffee7 JK |
526 | |
527 | case SHT_SYMTAB: /* A symbol table */ | |
32090b8e KR |
528 | if (elf_onesymtab (abfd) == shindex) |
529 | return true; | |
530 | ||
244ffee7 | 531 | BFD_ASSERT (hdr->sh_entsize == sizeof (Elf_External_Sym)); |
32090b8e | 532 | BFD_ASSERT (elf_onesymtab (abfd) == 0); |
244ffee7 | 533 | elf_onesymtab (abfd) = shindex; |
1c6042ee ILT |
534 | elf_tdata (abfd)->symtab_hdr = *hdr; |
535 | elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->symtab_hdr; | |
244ffee7 JK |
536 | abfd->flags |= HAS_SYMS; |
537 | return true; | |
538 | ||
cb71adf1 PS |
539 | case SHT_DYNSYM: /* A dynamic symbol table */ |
540 | if (elf_dynsymtab (abfd) == shindex) | |
541 | return true; | |
542 | ||
543 | BFD_ASSERT (hdr->sh_entsize == sizeof (Elf_External_Sym)); | |
544 | BFD_ASSERT (elf_dynsymtab (abfd) == 0); | |
545 | elf_dynsymtab (abfd) = shindex; | |
546 | elf_tdata (abfd)->dynsymtab_hdr = *hdr; | |
547 | elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->dynsymtab_hdr; | |
548 | abfd->flags |= HAS_SYMS; | |
fa15568a ILT |
549 | |
550 | /* Besides being a symbol table, we also treat this as a regular | |
551 | section, so that objcopy can handle it. */ | |
552 | return _bfd_elf_make_section_from_shdr (abfd, hdr, name); | |
cb71adf1 | 553 | |
244ffee7 | 554 | case SHT_STRTAB: /* A string table */ |
497c5434 | 555 | if (hdr->rawdata != NULL) |
fce36137 | 556 | return true; |
32090b8e KR |
557 | if (ehdr->e_shstrndx == shindex) |
558 | { | |
1c6042ee ILT |
559 | elf_tdata (abfd)->shstrtab_hdr = *hdr; |
560 | elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->shstrtab_hdr; | |
561 | hdr->rawdata = (PTR) & elf_tdata (abfd)->shstrtab_hdr; | |
32090b8e KR |
562 | return true; |
563 | } | |
564 | { | |
68241b2b | 565 | unsigned int i; |
fce36137 | 566 | |
32090b8e KR |
567 | for (i = 1; i < ehdr->e_shnum; i++) |
568 | { | |
1c6042ee | 569 | Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i]; |
32090b8e KR |
570 | if (hdr2->sh_link == shindex) |
571 | { | |
2e03ce18 ILT |
572 | if (! bfd_section_from_shdr (abfd, i)) |
573 | return false; | |
32090b8e KR |
574 | if (elf_onesymtab (abfd) == i) |
575 | { | |
1c6042ee | 576 | elf_tdata (abfd)->strtab_hdr = *hdr; |
fa15568a ILT |
577 | elf_elfsections (abfd)[shindex] = |
578 | &elf_tdata (abfd)->strtab_hdr; | |
32090b8e KR |
579 | return true; |
580 | } | |
cb71adf1 PS |
581 | if (elf_dynsymtab (abfd) == i) |
582 | { | |
583 | elf_tdata (abfd)->dynstrtab_hdr = *hdr; | |
fa15568a ILT |
584 | elf_elfsections (abfd)[shindex] = |
585 | &elf_tdata (abfd)->dynstrtab_hdr; | |
586 | /* We also treat this as a regular section, so | |
587 | that objcopy can handle it. */ | |
588 | break; | |
cb71adf1 | 589 | } |
2e03ce18 | 590 | #if 0 /* Not handling other string tables specially right now. */ |
1c6042ee | 591 | hdr2 = elf_elfsections (abfd)[i]; /* in case it moved */ |
32090b8e KR |
592 | /* We have a strtab for some random other section. */ |
593 | newsect = (asection *) hdr2->rawdata; | |
594 | if (!newsect) | |
595 | break; | |
596 | hdr->rawdata = (PTR) newsect; | |
597 | hdr2 = &elf_section_data (newsect)->str_hdr; | |
598 | *hdr2 = *hdr; | |
1c6042ee | 599 | elf_elfsections (abfd)[shindex] = hdr2; |
32090b8e KR |
600 | #endif |
601 | } | |
602 | } | |
603 | } | |
604 | ||
497c5434 | 605 | return _bfd_elf_make_section_from_shdr (abfd, hdr, name); |
244ffee7 JK |
606 | |
607 | case SHT_REL: | |
608 | case SHT_RELA: | |
497c5434 | 609 | /* *These* do a lot of work -- but build no sections! */ |
244ffee7 JK |
610 | { |
611 | asection *target_sect; | |
32090b8e | 612 | Elf_Internal_Shdr *hdr2; |
244ffee7 JK |
613 | int use_rela_p = get_elf_backend_data (abfd)->use_rela_p; |
614 | ||
497c5434 ILT |
615 | /* Get the symbol table. */ |
616 | if (! bfd_section_from_shdr (abfd, hdr->sh_link)) | |
617 | return false; | |
618 | ||
e6667b2b ILT |
619 | /* If this reloc section does not use the main symbol table we |
620 | don't treat it as a reloc section. BFD can't adequately | |
621 | represent such a section, so at least for now, we don't | |
622 | try. We just present it as a normal section. */ | |
623 | if (hdr->sh_link != elf_onesymtab (abfd)) | |
497c5434 ILT |
624 | return _bfd_elf_make_section_from_shdr (abfd, hdr, name); |
625 | ||
244ffee7 JK |
626 | /* Don't allow REL relocations on a machine that uses RELA and |
627 | vice versa. */ | |
628 | /* @@ Actually, the generic ABI does suggest that both might be | |
629 | used in one file. But the four ABI Processor Supplements I | |
630 | have access to right now all specify that only one is used on | |
631 | each of those architectures. It's conceivable that, e.g., a | |
632 | bunch of absolute 32-bit relocs might be more compact in REL | |
633 | form even on a RELA machine... */ | |
497c5434 ILT |
634 | BFD_ASSERT (use_rela_p |
635 | ? (hdr->sh_type == SHT_RELA | |
636 | && hdr->sh_entsize == sizeof (Elf_External_Rela)) | |
637 | : (hdr->sh_type == SHT_REL | |
638 | && hdr->sh_entsize == sizeof (Elf_External_Rel))); | |
639 | ||
640 | if (! bfd_section_from_shdr (abfd, hdr->sh_info)) | |
2e03ce18 | 641 | return false; |
244ffee7 | 642 | target_sect = section_from_elf_index (abfd, hdr->sh_info); |
062189c6 ILT |
643 | if (target_sect == NULL |
644 | || elf_section_data (target_sect) == NULL) | |
244ffee7 JK |
645 | return false; |
646 | ||
32090b8e KR |
647 | hdr2 = &elf_section_data (target_sect)->rel_hdr; |
648 | *hdr2 = *hdr; | |
1c6042ee | 649 | elf_elfsections (abfd)[shindex] = hdr2; |
244ffee7 JK |
650 | target_sect->reloc_count = hdr->sh_size / hdr->sh_entsize; |
651 | target_sect->flags |= SEC_RELOC; | |
497c5434 | 652 | target_sect->relocation = NULL; |
244ffee7 | 653 | target_sect->rel_filepos = hdr->sh_offset; |
32090b8e | 654 | abfd->flags |= HAS_RELOC; |
244ffee7 JK |
655 | return true; |
656 | } | |
657 | break; | |
658 | ||
244ffee7 JK |
659 | case SHT_NOTE: |
660 | #if 0 | |
661 | fprintf (stderr, "Note Sections not yet supported.\n"); | |
662 | BFD_FAIL (); | |
663 | #endif | |
664 | break; | |
665 | ||
666 | case SHT_SHLIB: | |
667 | #if 0 | |
668 | fprintf (stderr, "SHLIB Sections not supported (and non conforming.)\n"); | |
669 | #endif | |
670 | return true; | |
671 | ||
672 | default: | |
e621c5cc ILT |
673 | /* Check for any processor-specific section types. */ |
674 | { | |
675 | struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
676 | ||
677 | if (bed->elf_backend_section_from_shdr) | |
678 | (*bed->elf_backend_section_from_shdr) (abfd, hdr, name); | |
679 | } | |
244ffee7 JK |
680 | break; |
681 | } | |
682 | ||
683 | return true; | |
684 | } | |
685 | ||
fce36137 | 686 | boolean |
1c6042ee ILT |
687 | elf_new_section_hook (abfd, sec) |
688 | bfd *abfd | |
689 | ; | |
690 | asection *sec; | |
fce36137 | 691 | { |
32090b8e | 692 | struct bfd_elf_section_data *sdata; |
300adb31 KR |
693 | |
694 | sdata = (struct bfd_elf_section_data *) bfd_alloc (abfd, sizeof (*sdata)); | |
9783e04a DM |
695 | if (!sdata) |
696 | { | |
d1ad85a6 | 697 | bfd_set_error (bfd_error_no_memory); |
9783e04a DM |
698 | return false; |
699 | } | |
300adb31 | 700 | sec->used_by_bfd = (PTR) sdata; |
32090b8e | 701 | memset (sdata, 0, sizeof (*sdata)); |
244ffee7 JK |
702 | return true; |
703 | } | |
704 | ||
705 | /* Create a new bfd section from an ELF program header. | |
706 | ||
707 | Since program segments have no names, we generate a synthetic name | |
708 | of the form segment<NUM>, where NUM is generally the index in the | |
709 | program header table. For segments that are split (see below) we | |
710 | generate the names segment<NUM>a and segment<NUM>b. | |
711 | ||
712 | Note that some program segments may have a file size that is different than | |
713 | (less than) the memory size. All this means is that at execution the | |
714 | system must allocate the amount of memory specified by the memory size, | |
715 | but only initialize it with the first "file size" bytes read from the | |
716 | file. This would occur for example, with program segments consisting | |
717 | of combined data+bss. | |
718 | ||
719 | To handle the above situation, this routine generates TWO bfd sections | |
720 | for the single program segment. The first has the length specified by | |
721 | the file size of the segment, and the second has the length specified | |
722 | by the difference between the two sizes. In effect, the segment is split | |
723 | into it's initialized and uninitialized parts. | |
724 | ||
725 | */ | |
726 | ||
727 | static boolean | |
1c6042ee ILT |
728 | bfd_section_from_phdr (abfd, hdr, index) |
729 | bfd *abfd; | |
730 | Elf_Internal_Phdr *hdr; | |
731 | int index; | |
244ffee7 JK |
732 | { |
733 | asection *newsect; | |
734 | char *name; | |
735 | char namebuf[64]; | |
736 | int split; | |
737 | ||
738 | split = ((hdr->p_memsz > 0) && | |
739 | (hdr->p_filesz > 0) && | |
740 | (hdr->p_memsz > hdr->p_filesz)); | |
741 | sprintf (namebuf, split ? "segment%da" : "segment%d", index); | |
742 | name = bfd_alloc (abfd, strlen (namebuf) + 1); | |
9783e04a DM |
743 | if (!name) |
744 | { | |
d1ad85a6 | 745 | bfd_set_error (bfd_error_no_memory); |
9783e04a DM |
746 | return false; |
747 | } | |
244ffee7 JK |
748 | strcpy (name, namebuf); |
749 | newsect = bfd_make_section (abfd, name); | |
2e03ce18 ILT |
750 | if (newsect == NULL) |
751 | return false; | |
244ffee7 JK |
752 | newsect->vma = hdr->p_vaddr; |
753 | newsect->_raw_size = hdr->p_filesz; | |
754 | newsect->filepos = hdr->p_offset; | |
755 | newsect->flags |= SEC_HAS_CONTENTS; | |
756 | if (hdr->p_type == PT_LOAD) | |
757 | { | |
758 | newsect->flags |= SEC_ALLOC; | |
759 | newsect->flags |= SEC_LOAD; | |
760 | if (hdr->p_flags & PF_X) | |
761 | { | |
762 | /* FIXME: all we known is that it has execute PERMISSION, | |
763 | may be data. */ | |
764 | newsect->flags |= SEC_CODE; | |
765 | } | |
766 | } | |
767 | if (!(hdr->p_flags & PF_W)) | |
768 | { | |
769 | newsect->flags |= SEC_READONLY; | |
770 | } | |
771 | ||
772 | if (split) | |
773 | { | |
774 | sprintf (namebuf, "segment%db", index); | |
775 | name = bfd_alloc (abfd, strlen (namebuf) + 1); | |
9783e04a DM |
776 | if (!name) |
777 | { | |
d1ad85a6 | 778 | bfd_set_error (bfd_error_no_memory); |
9783e04a DM |
779 | return false; |
780 | } | |
244ffee7 JK |
781 | strcpy (name, namebuf); |
782 | newsect = bfd_make_section (abfd, name); | |
2e03ce18 ILT |
783 | if (newsect == NULL) |
784 | return false; | |
244ffee7 JK |
785 | newsect->vma = hdr->p_vaddr + hdr->p_filesz; |
786 | newsect->_raw_size = hdr->p_memsz - hdr->p_filesz; | |
787 | if (hdr->p_type == PT_LOAD) | |
788 | { | |
789 | newsect->flags |= SEC_ALLOC; | |
790 | if (hdr->p_flags & PF_X) | |
791 | newsect->flags |= SEC_CODE; | |
792 | } | |
793 | if (!(hdr->p_flags & PF_W)) | |
794 | newsect->flags |= SEC_READONLY; | |
795 | } | |
796 | ||
797 | return true; | |
798 | } | |
799 | ||
32090b8e | 800 | /* Begin processing a given object. |
244ffee7 | 801 | |
32090b8e KR |
802 | First we validate the file by reading in the ELF header and checking |
803 | the magic number. */ | |
804 | ||
805 | static INLINE boolean | |
1c6042ee ILT |
806 | elf_file_p (x_ehdrp) |
807 | Elf_External_Ehdr *x_ehdrp; | |
244ffee7 | 808 | { |
32090b8e KR |
809 | return ((x_ehdrp->e_ident[EI_MAG0] == ELFMAG0) |
810 | && (x_ehdrp->e_ident[EI_MAG1] == ELFMAG1) | |
811 | && (x_ehdrp->e_ident[EI_MAG2] == ELFMAG2) | |
812 | && (x_ehdrp->e_ident[EI_MAG3] == ELFMAG3)); | |
813 | } | |
244ffee7 | 814 | |
d24928c0 KR |
815 | /* Check to see if the file associated with ABFD matches the target vector |
816 | that ABFD points to. | |
817 | ||
818 | Note that we may be called several times with the same ABFD, but different | |
819 | target vectors, most of which will not match. We have to avoid leaving | |
820 | any side effects in ABFD, or any data it points to (like tdata), if the | |
6ec3bb6a | 821 | file does not match the target vector. */ |
d24928c0 | 822 | |
32090b8e | 823 | bfd_target * |
1c6042ee ILT |
824 | elf_object_p (abfd) |
825 | bfd *abfd; | |
244ffee7 | 826 | { |
32090b8e KR |
827 | Elf_External_Ehdr x_ehdr; /* Elf file header, external form */ |
828 | Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */ | |
829 | Elf_External_Shdr x_shdr; /* Section header table entry, external form */ | |
6ec3bb6a | 830 | Elf_Internal_Shdr *i_shdrp = NULL; /* Section header table, internal form */ |
68241b2b | 831 | unsigned int shindex; |
32090b8e | 832 | char *shstrtab; /* Internal copy of section header stringtab */ |
062189c6 | 833 | struct elf_backend_data *ebd; |
d24928c0 | 834 | struct elf_obj_tdata *preserved_tdata = elf_tdata (abfd); |
6ec3bb6a | 835 | struct elf_obj_tdata *new_tdata = NULL; |
244ffee7 | 836 | |
32090b8e KR |
837 | /* Read in the ELF header in external format. */ |
838 | ||
839 | if (bfd_read ((PTR) & x_ehdr, sizeof (x_ehdr), 1, abfd) != sizeof (x_ehdr)) | |
25057836 JL |
840 | { |
841 | if (bfd_get_error () != bfd_error_system_call) | |
842 | goto got_wrong_format_error; | |
843 | else | |
844 | goto got_no_match; | |
845 | } | |
244ffee7 | 846 | |
32090b8e KR |
847 | /* Now check to see if we have a valid ELF file, and one that BFD can |
848 | make use of. The magic number must match, the address size ('class') | |
849 | and byte-swapping must match our XVEC entry, and it must have a | |
850 | section header table (FIXME: See comments re sections at top of this | |
851 | file). */ | |
244ffee7 | 852 | |
d24928c0 KR |
853 | if ((elf_file_p (&x_ehdr) == false) || |
854 | (x_ehdr.e_ident[EI_VERSION] != EV_CURRENT) || | |
855 | (x_ehdr.e_ident[EI_CLASS] != ELFCLASS)) | |
856 | goto got_wrong_format_error; | |
244ffee7 | 857 | |
d24928c0 | 858 | /* Check that file's byte order matches xvec's */ |
32090b8e | 859 | switch (x_ehdr.e_ident[EI_DATA]) |
244ffee7 | 860 | { |
32090b8e KR |
861 | case ELFDATA2MSB: /* Big-endian */ |
862 | if (!abfd->xvec->header_byteorder_big_p) | |
d24928c0 | 863 | goto got_wrong_format_error; |
32090b8e KR |
864 | break; |
865 | case ELFDATA2LSB: /* Little-endian */ | |
866 | if (abfd->xvec->header_byteorder_big_p) | |
d24928c0 | 867 | goto got_wrong_format_error; |
32090b8e KR |
868 | break; |
869 | case ELFDATANONE: /* No data encoding specified */ | |
870 | default: /* Unknown data encoding specified */ | |
d24928c0 | 871 | goto got_wrong_format_error; |
244ffee7 | 872 | } |
244ffee7 | 873 | |
32090b8e | 874 | /* Allocate an instance of the elf_obj_tdata structure and hook it up to |
6ec3bb6a | 875 | the tdata pointer in the bfd. */ |
244ffee7 | 876 | |
6ec3bb6a ILT |
877 | new_tdata = ((struct elf_obj_tdata *) |
878 | bfd_zalloc (abfd, sizeof (struct elf_obj_tdata))); | |
879 | if (new_tdata == NULL) | |
d24928c0 | 880 | goto got_no_memory_error; |
6ec3bb6a | 881 | elf_tdata (abfd) = new_tdata; |
244ffee7 | 882 | |
32090b8e KR |
883 | /* Now that we know the byte order, swap in the rest of the header */ |
884 | i_ehdrp = elf_elfheader (abfd); | |
885 | elf_swap_ehdr_in (abfd, &x_ehdr, i_ehdrp); | |
886 | #if DEBUG & 1 | |
887 | elf_debug_file (i_ehdrp); | |
244ffee7 JK |
888 | #endif |
889 | ||
32090b8e KR |
890 | /* If there is no section header table, we're hosed. */ |
891 | if (i_ehdrp->e_shoff == 0) | |
d24928c0 | 892 | goto got_wrong_format_error; |
244ffee7 | 893 | |
062189c6 ILT |
894 | /* As a simple sanity check, verify that the what BFD thinks is the |
895 | size of each section header table entry actually matches the size | |
896 | recorded in the file. */ | |
897 | if (i_ehdrp->e_shentsize != sizeof (x_shdr)) | |
898 | goto got_wrong_format_error; | |
899 | ||
900 | ebd = get_elf_backend_data (abfd); | |
901 | ||
902 | /* Check that the ELF e_machine field matches what this particular | |
903 | BFD format expects. */ | |
904 | if (ebd->elf_machine_code != i_ehdrp->e_machine) | |
905 | { | |
906 | bfd_target **target_ptr; | |
907 | ||
908 | if (ebd->elf_machine_code != EM_NONE) | |
909 | goto got_wrong_format_error; | |
910 | ||
911 | /* This is the generic ELF target. Let it match any ELF target | |
912 | for which we do not have a specific backend. */ | |
f4bd7a8f | 913 | for (target_ptr = bfd_target_vector; *target_ptr != NULL; target_ptr++) |
062189c6 ILT |
914 | { |
915 | struct elf_backend_data *back; | |
916 | ||
917 | if ((*target_ptr)->flavour != bfd_target_elf_flavour) | |
918 | continue; | |
919 | back = (struct elf_backend_data *) (*target_ptr)->backend_data; | |
920 | if (back->elf_machine_code == i_ehdrp->e_machine) | |
921 | { | |
922 | /* target_ptr is an ELF backend which matches this | |
923 | object file, so reject the generic ELF target. */ | |
924 | goto got_wrong_format_error; | |
925 | } | |
926 | } | |
927 | } | |
928 | ||
7b8106b4 | 929 | if (i_ehdrp->e_type == ET_EXEC) |
32090b8e | 930 | abfd->flags |= EXEC_P; |
7b8106b4 ILT |
931 | else if (i_ehdrp->e_type == ET_DYN) |
932 | abfd->flags |= DYNAMIC; | |
244ffee7 | 933 | |
fa15568a ILT |
934 | if (i_ehdrp->e_phnum > 0) |
935 | abfd->flags |= D_PAGED; | |
936 | ||
6ec3bb6a ILT |
937 | if (! bfd_default_set_arch_mach (abfd, ebd->arch, 0)) |
938 | goto got_no_match; | |
32090b8e | 939 | |
062189c6 ILT |
940 | /* Remember the entry point specified in the ELF file header. */ |
941 | bfd_get_start_address (abfd) = i_ehdrp->e_entry; | |
32090b8e KR |
942 | |
943 | /* Allocate space for a copy of the section header table in | |
944 | internal form, seek to the section header table in the file, | |
062189c6 | 945 | read it in, and convert it to internal form. */ |
6ec3bb6a ILT |
946 | i_shdrp = ((Elf_Internal_Shdr *) |
947 | bfd_alloc (abfd, sizeof (*i_shdrp) * i_ehdrp->e_shnum)); | |
948 | elf_elfsections (abfd) = ((Elf_Internal_Shdr **) | |
949 | bfd_alloc (abfd, | |
950 | sizeof (i_shdrp) * i_ehdrp->e_shnum)); | |
1c6042ee | 951 | if (!i_shdrp || !elf_elfsections (abfd)) |
d24928c0 | 952 | goto got_no_memory_error; |
6ec3bb6a | 953 | if (bfd_seek (abfd, i_ehdrp->e_shoff, SEEK_SET) != 0) |
25057836 | 954 | goto got_no_match; |
32090b8e | 955 | for (shindex = 0; shindex < i_ehdrp->e_shnum; shindex++) |
244ffee7 | 956 | { |
d24928c0 | 957 | if (bfd_read ((PTR) & x_shdr, sizeof x_shdr, 1, abfd) != sizeof (x_shdr)) |
25057836 | 958 | goto got_no_match; |
32090b8e | 959 | elf_swap_shdr_in (abfd, &x_shdr, i_shdrp + shindex); |
1c6042ee | 960 | elf_elfsections (abfd)[shindex] = i_shdrp + shindex; |
38a5f510 ILT |
961 | |
962 | /* If this is a .dynamic section, mark the object file as being | |
963 | dynamically linked. */ | |
964 | if (i_shdrp[shindex].sh_type == SHT_DYNAMIC) | |
965 | abfd->flags |= DYNAMIC; | |
244ffee7 | 966 | } |
32090b8e | 967 | if (i_ehdrp->e_shstrndx) |
244ffee7 | 968 | { |
2e03ce18 ILT |
969 | if (! bfd_section_from_shdr (abfd, i_ehdrp->e_shstrndx)) |
970 | goto got_no_match; | |
244ffee7 JK |
971 | } |
972 | ||
32090b8e KR |
973 | /* Read in the string table containing the names of the sections. We |
974 | will need the base pointer to this table later. */ | |
975 | /* We read this inline now, so that we don't have to go through | |
976 | bfd_section_from_shdr with it (since this particular strtab is | |
977 | used to find all of the ELF section names.) */ | |
244ffee7 | 978 | |
32090b8e KR |
979 | shstrtab = elf_get_str_section (abfd, i_ehdrp->e_shstrndx); |
980 | if (!shstrtab) | |
6ec3bb6a | 981 | goto got_no_match; |
244ffee7 | 982 | |
32090b8e KR |
983 | /* Once all of the section headers have been read and converted, we |
984 | can start processing them. Note that the first section header is | |
6ec3bb6a | 985 | a dummy placeholder entry, so we ignore it. */ |
244ffee7 | 986 | |
32090b8e KR |
987 | for (shindex = 1; shindex < i_ehdrp->e_shnum; shindex++) |
988 | { | |
2e03ce18 ILT |
989 | if (! bfd_section_from_shdr (abfd, shindex)) |
990 | goto got_no_match; | |
32090b8e | 991 | } |
244ffee7 | 992 | |
5315c428 ILT |
993 | /* Let the backend double check the format and override global |
994 | information. */ | |
995 | if (ebd->elf_backend_object_p) | |
996 | { | |
997 | if ((*ebd->elf_backend_object_p) (abfd) == false) | |
998 | goto got_wrong_format_error; | |
999 | } | |
1000 | ||
d24928c0 KR |
1001 | return (abfd->xvec); |
1002 | ||
1c6042ee | 1003 | got_wrong_format_error: |
d1ad85a6 | 1004 | bfd_set_error (bfd_error_wrong_format); |
d24928c0 | 1005 | goto got_no_match; |
1c6042ee | 1006 | got_no_memory_error: |
d1ad85a6 | 1007 | bfd_set_error (bfd_error_no_memory); |
d24928c0 | 1008 | goto got_no_match; |
1c6042ee | 1009 | got_no_match: |
6ec3bb6a ILT |
1010 | if (new_tdata != NULL |
1011 | && new_tdata->elf_sect_ptr != NULL) | |
1012 | bfd_release (abfd, new_tdata->elf_sect_ptr); | |
1013 | if (i_shdrp != NULL) | |
1014 | bfd_release (abfd, i_shdrp); | |
1015 | if (new_tdata != NULL) | |
1016 | bfd_release (abfd, new_tdata); | |
d24928c0 KR |
1017 | elf_tdata (abfd) = preserved_tdata; |
1018 | return (NULL); | |
32090b8e | 1019 | } |
32090b8e | 1020 | \f |
1c6042ee | 1021 | |
32090b8e KR |
1022 | /* ELF .o/exec file writing */ |
1023 | ||
d24928c0 KR |
1024 | /* Takes a bfd and a symbol, returns a pointer to the elf specific area |
1025 | of the symbol if there is one. */ | |
32090b8e | 1026 | static INLINE elf_symbol_type * |
1c6042ee ILT |
1027 | elf_symbol_from (ignore_abfd, symbol) |
1028 | bfd *ignore_abfd; | |
1029 | asymbol *symbol; | |
244ffee7 | 1030 | { |
32090b8e KR |
1031 | if (symbol->the_bfd->xvec->flavour != bfd_target_elf_flavour) |
1032 | return 0; | |
1033 | ||
1034 | if (symbol->the_bfd->tdata.elf_obj_data == (struct elf_obj_tdata *) NULL) | |
1035 | return 0; | |
1036 | ||
1037 | return (elf_symbol_type *) symbol; | |
244ffee7 JK |
1038 | } |
1039 | ||
32090b8e KR |
1040 | void |
1041 | write_relocs (abfd, sec, xxx) | |
1042 | bfd *abfd; | |
1043 | asection *sec; | |
1044 | PTR xxx; | |
1045 | { | |
1046 | Elf_Internal_Shdr *rela_hdr; | |
1047 | Elf_External_Rela *outbound_relocas; | |
1048 | Elf_External_Rel *outbound_relocs; | |
1049 | int idx; | |
1050 | int use_rela_p = get_elf_backend_data (abfd)->use_rela_p; | |
300adb31 | 1051 | asymbol *last_sym = 0; |
38a5f510 | 1052 | int last_sym_idx = 9999999; /* should always be written before use */ |
244ffee7 | 1053 | |
32090b8e KR |
1054 | if ((sec->flags & SEC_RELOC) == 0) |
1055 | return; | |
6ec3bb6a ILT |
1056 | |
1057 | /* The linker backend writes the relocs out itself, and sets the | |
1058 | reloc_count field to zero to inhibit writing them here. Also, | |
1059 | sometimes the SEC_RELOC flag gets set even when there aren't any | |
1060 | relocs. */ | |
32090b8e KR |
1061 | if (sec->reloc_count == 0) |
1062 | return; | |
244ffee7 | 1063 | |
32090b8e | 1064 | rela_hdr = &elf_section_data (sec)->rel_hdr; |
244ffee7 | 1065 | |
32090b8e KR |
1066 | rela_hdr->sh_size = rela_hdr->sh_entsize * sec->reloc_count; |
1067 | rela_hdr->contents = (void *) bfd_alloc (abfd, rela_hdr->sh_size); | |
9783e04a DM |
1068 | if (!rela_hdr->contents) |
1069 | { | |
d1ad85a6 | 1070 | bfd_set_error (bfd_error_no_memory); |
1c6042ee | 1071 | abort (); /* FIXME */ |
9783e04a | 1072 | } |
244ffee7 | 1073 | |
32090b8e | 1074 | /* orelocation has the data, reloc_count has the count... */ |
300adb31 KR |
1075 | if (use_rela_p) |
1076 | { | |
1077 | outbound_relocas = (Elf_External_Rela *) rela_hdr->contents; | |
1078 | ||
1079 | for (idx = 0; idx < sec->reloc_count; idx++) | |
32090b8e | 1080 | { |
300adb31 KR |
1081 | Elf_Internal_Rela dst_rela; |
1082 | Elf_External_Rela *src_rela; | |
1083 | arelent *ptr; | |
1084 | asymbol *sym; | |
1085 | int n; | |
1086 | ||
1087 | ptr = sec->orelocation[idx]; | |
1088 | src_rela = outbound_relocas + idx; | |
1089 | if (!(abfd->flags & EXEC_P)) | |
1090 | dst_rela.r_offset = ptr->address - sec->vma; | |
1091 | else | |
1092 | dst_rela.r_offset = ptr->address; | |
6a3eb9b6 | 1093 | |
300adb31 KR |
1094 | sym = *ptr->sym_ptr_ptr; |
1095 | if (sym == last_sym) | |
1096 | n = last_sym_idx; | |
1097 | else | |
32090b8e | 1098 | { |
300adb31 KR |
1099 | last_sym = sym; |
1100 | last_sym_idx = n = elf_symbol_from_bfd_symbol (abfd, &sym); | |
32090b8e | 1101 | } |
300adb31 KR |
1102 | dst_rela.r_info = ELF_R_INFO (n, ptr->howto->type); |
1103 | ||
1104 | dst_rela.r_addend = ptr->addend; | |
1105 | elf_swap_reloca_out (abfd, &dst_rela, src_rela); | |
244ffee7 | 1106 | } |
300adb31 KR |
1107 | } |
1108 | else | |
1109 | /* REL relocations */ | |
1110 | { | |
1111 | outbound_relocs = (Elf_External_Rel *) rela_hdr->contents; | |
1112 | ||
1113 | for (idx = 0; idx < sec->reloc_count; idx++) | |
32090b8e | 1114 | { |
300adb31 KR |
1115 | Elf_Internal_Rel dst_rel; |
1116 | Elf_External_Rel *src_rel; | |
1117 | arelent *ptr; | |
1118 | int n; | |
1119 | asymbol *sym; | |
1120 | ||
1121 | ptr = sec->orelocation[idx]; | |
1122 | sym = *ptr->sym_ptr_ptr; | |
1123 | src_rel = outbound_relocs + idx; | |
1124 | if (!(abfd->flags & EXEC_P)) | |
1125 | dst_rel.r_offset = ptr->address - sec->vma; | |
1126 | else | |
1127 | dst_rel.r_offset = ptr->address; | |
244ffee7 | 1128 | |
300adb31 KR |
1129 | if (sym == last_sym) |
1130 | n = last_sym_idx; | |
1131 | else | |
32090b8e | 1132 | { |
300adb31 KR |
1133 | last_sym = sym; |
1134 | last_sym_idx = n = elf_symbol_from_bfd_symbol (abfd, &sym); | |
32090b8e | 1135 | } |
300adb31 KR |
1136 | dst_rel.r_info = ELF_R_INFO (n, ptr->howto->type); |
1137 | ||
1138 | elf_swap_reloc_out (abfd, &dst_rel, src_rel); | |
32090b8e | 1139 | } |
300adb31 | 1140 | } |
32090b8e | 1141 | } |
244ffee7 | 1142 | |
fa15568a | 1143 | /* Set up an ELF internal section header for a section. */ |
244ffee7 | 1144 | |
fa15568a | 1145 | /*ARGSUSED*/ |
32090b8e | 1146 | static void |
fa15568a | 1147 | elf_fake_sections (abfd, asect, ignore) |
1c6042ee ILT |
1148 | bfd *abfd; |
1149 | asection *asect; | |
fa15568a | 1150 | PTR ignore; |
32090b8e | 1151 | { |
32090b8e | 1152 | Elf_Internal_Shdr *this_hdr; |
fa15568a | 1153 | |
32090b8e | 1154 | this_hdr = &elf_section_data (asect)->this_hdr; |
fa15568a ILT |
1155 | |
1156 | this_hdr->sh_name = bfd_add_to_strtab (abfd, elf_shstrtab (abfd), | |
1157 | asect->name); | |
6ec3bb6a ILT |
1158 | if (this_hdr->sh_name == (unsigned long) -1) |
1159 | abort (); /* FIXME */ | |
fa15568a ILT |
1160 | |
1161 | this_hdr->sh_flags = 0; | |
1162 | if ((asect->flags & SEC_ALLOC) != 0) | |
1163 | this_hdr->sh_addr = asect->vma; | |
1164 | else | |
1165 | this_hdr->sh_addr = 0; | |
1166 | this_hdr->sh_offset = 0; | |
1167 | this_hdr->sh_size = asect->_raw_size; | |
1168 | this_hdr->sh_link = 0; | |
1169 | this_hdr->sh_info = 0; | |
32090b8e | 1170 | this_hdr->sh_addralign = 1 << asect->alignment_power; |
fa15568a ILT |
1171 | this_hdr->sh_entsize = 0; |
1172 | ||
1173 | this_hdr->rawdata = (PTR) asect; | |
1174 | this_hdr->contents = NULL; | |
1175 | this_hdr->size = 0; | |
013dec1a ILT |
1176 | |
1177 | /* FIXME: This should not be based on section names. */ | |
1178 | if (strcmp (asect->name, ".dynstr") == 0) | |
1179 | this_hdr->sh_type = SHT_STRTAB; | |
1180 | else if (strcmp (asect->name, ".hash") == 0) | |
fa15568a ILT |
1181 | { |
1182 | this_hdr->sh_type = SHT_HASH; | |
1183 | this_hdr->sh_entsize = ARCH_SIZE / 8; | |
1184 | } | |
013dec1a | 1185 | else if (strcmp (asect->name, ".dynsym") == 0) |
fa15568a ILT |
1186 | { |
1187 | this_hdr->sh_type = SHT_DYNSYM; | |
1188 | this_hdr->sh_entsize = sizeof (Elf_External_Sym); | |
1189 | } | |
013dec1a | 1190 | else if (strcmp (asect->name, ".dynamic") == 0) |
fa15568a ILT |
1191 | { |
1192 | this_hdr->sh_type = SHT_DYNAMIC; | |
1193 | this_hdr->sh_entsize = sizeof (Elf_External_Dyn); | |
1194 | } | |
013dec1a | 1195 | else if (strncmp (asect->name, ".rel.", 5) == 0) |
fa15568a ILT |
1196 | { |
1197 | this_hdr->sh_type = SHT_REL; | |
1198 | this_hdr->sh_entsize = sizeof (Elf_External_Rel); | |
1199 | } | |
013dec1a | 1200 | else if (strncmp (asect->name, ".rela.", 6) == 0) |
fa15568a ILT |
1201 | { |
1202 | this_hdr->sh_type = SHT_RELA; | |
1203 | this_hdr->sh_entsize = sizeof (Elf_External_Rela); | |
1204 | } | |
1205 | else if (strcmp (asect->name, ".note") == 0) | |
1206 | this_hdr->sh_type = SHT_NOTE; | |
1207 | else if (strncmp (asect->name, ".stab", 5) == 0 | |
1208 | && strcmp (asect->name + strlen (asect->name) - 3, "str") == 0) | |
1209 | this_hdr->sh_type = SHT_STRTAB; | |
1210 | else if ((asect->flags & SEC_ALLOC) != 0 | |
1211 | && (asect->flags & SEC_LOAD) != 0) | |
32090b8e | 1212 | this_hdr->sh_type = SHT_PROGBITS; |
fa15568a ILT |
1213 | else if ((asect->flags & SEC_ALLOC) != 0 |
1214 | && ((asect->flags & SEC_LOAD) == 0)) | |
e621c5cc | 1215 | { |
6c35a16d ILT |
1216 | BFD_ASSERT (strcmp (asect->name, ".bss") == 0 |
1217 | || strcmp (asect->name, ".sbss") == 0); | |
e621c5cc ILT |
1218 | this_hdr->sh_type = SHT_NOBITS; |
1219 | } | |
32090b8e | 1220 | else |
fa15568a ILT |
1221 | { |
1222 | /* Who knows? */ | |
1223 | this_hdr->sh_type = SHT_PROGBITS; | |
1224 | } | |
32090b8e | 1225 | |
fa15568a ILT |
1226 | if ((asect->flags & SEC_ALLOC) != 0) |
1227 | this_hdr->sh_flags |= SHF_ALLOC; | |
1228 | if ((asect->flags & SEC_READONLY) == 0) | |
1229 | this_hdr->sh_flags |= SHF_WRITE; | |
1230 | if ((asect->flags & SEC_CODE) != 0) | |
1231 | this_hdr->sh_flags |= SHF_EXECINSTR; | |
244ffee7 | 1232 | |
fa15568a | 1233 | /* Check for processor-specific section types. */ |
f035cc47 ILT |
1234 | { |
1235 | struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
1236 | ||
1237 | if (bed->elf_backend_fake_sections) | |
1238 | (*bed->elf_backend_fake_sections) (abfd, this_hdr, asect); | |
1239 | } | |
1240 | ||
fa15568a ILT |
1241 | /* If the section has relocs, set up a section header for the |
1242 | SHT_REL[A] section. */ | |
1243 | if ((asect->flags & SEC_RELOC) != 0) | |
1244 | { | |
1245 | Elf_Internal_Shdr *rela_hdr; | |
1246 | int use_rela_p = get_elf_backend_data (abfd)->use_rela_p; | |
244ffee7 | 1247 | |
fa15568a ILT |
1248 | rela_hdr = &elf_section_data (asect)->rel_hdr; |
1249 | rela_hdr->sh_name = | |
1250 | bfd_add_2_to_strtab (abfd, elf_shstrtab (abfd), | |
1251 | use_rela_p ? ".rela" : ".rel", | |
1252 | asect->name); | |
1253 | rela_hdr->sh_type = use_rela_p ? SHT_RELA : SHT_REL; | |
1254 | rela_hdr->sh_entsize = (use_rela_p | |
1255 | ? sizeof (Elf_External_Rela) | |
1256 | : sizeof (Elf_External_Rel)); | |
1257 | rela_hdr->sh_addralign = FILE_ALIGN; | |
1258 | rela_hdr->sh_flags = 0; | |
1259 | rela_hdr->sh_addr = 0; | |
1260 | rela_hdr->sh_size = 0; | |
1261 | rela_hdr->sh_offset = 0; | |
1262 | rela_hdr->size = 0; | |
1263 | } | |
1264 | } | |
244ffee7 | 1265 | |
fa15568a ILT |
1266 | /* Assign all ELF section numbers. The dummy first section is handled here |
1267 | too. The link/info pointers for the standard section types are filled | |
e6667b2b | 1268 | in here too, while we're at it. */ |
244ffee7 | 1269 | |
fa15568a ILT |
1270 | static boolean |
1271 | assign_section_numbers (abfd) | |
1272 | bfd *abfd; | |
1273 | { | |
1274 | struct elf_obj_tdata *t = elf_tdata (abfd); | |
1275 | asection *sec; | |
1276 | unsigned int section_number; | |
1277 | Elf_Internal_Shdr **i_shdrp; | |
1278 | ||
1279 | section_number = 1; | |
1280 | ||
fa15568a ILT |
1281 | for (sec = abfd->sections; sec; sec = sec->next) |
1282 | { | |
1283 | struct bfd_elf_section_data *d = elf_section_data (sec); | |
1284 | ||
1285 | d->this_idx = section_number++; | |
1286 | if ((sec->flags & SEC_RELOC) == 0) | |
1287 | d->rel_idx = 0; | |
1288 | else | |
1289 | d->rel_idx = section_number++; | |
1290 | } | |
1291 | ||
7c726b66 ILT |
1292 | t->shstrtab_section = section_number++; |
1293 | elf_elfheader (abfd)->e_shstrndx = t->shstrtab_section; | |
1294 | t->shstrtab_hdr.sh_size = elf_shstrtab (abfd)->length; | |
1295 | t->shstrtab_hdr.contents = (PTR) elf_shstrtab (abfd)->tab; | |
1296 | ||
1297 | if (abfd->symcount > 0) | |
1298 | { | |
1299 | t->symtab_section = section_number++; | |
1300 | t->strtab_section = section_number++; | |
1301 | } | |
1302 | ||
fa15568a ILT |
1303 | elf_elfheader (abfd)->e_shnum = section_number; |
1304 | ||
1305 | /* Set up the list of section header pointers, in agreement with the | |
1306 | indices. */ | |
1307 | i_shdrp = ((Elf_Internal_Shdr **) | |
1308 | bfd_alloc (abfd, section_number * sizeof (Elf_Internal_Shdr *))); | |
1309 | if (i_shdrp == NULL) | |
1310 | { | |
1311 | bfd_set_error (bfd_error_no_memory); | |
1312 | return false; | |
1313 | } | |
1314 | ||
1315 | i_shdrp[0] = ((Elf_Internal_Shdr *) | |
1316 | bfd_alloc (abfd, sizeof (Elf_Internal_Shdr))); | |
1317 | if (i_shdrp[0] == NULL) | |
1318 | { | |
1319 | bfd_release (abfd, i_shdrp); | |
1320 | bfd_set_error (bfd_error_no_memory); | |
1321 | return false; | |
1322 | } | |
1323 | memset (i_shdrp[0], 0, sizeof (Elf_Internal_Shdr)); | |
1324 | ||
1325 | elf_elfsections (abfd) = i_shdrp; | |
1326 | ||
1327 | i_shdrp[t->shstrtab_section] = &t->shstrtab_hdr; | |
1328 | if (abfd->symcount > 0) | |
1329 | { | |
1330 | i_shdrp[t->symtab_section] = &t->symtab_hdr; | |
1331 | i_shdrp[t->strtab_section] = &t->strtab_hdr; | |
1332 | t->symtab_hdr.sh_link = t->strtab_section; | |
1333 | } | |
1334 | for (sec = abfd->sections; sec; sec = sec->next) | |
32090b8e | 1335 | { |
fa15568a ILT |
1336 | struct bfd_elf_section_data *d = elf_section_data (sec); |
1337 | asection *s; | |
1338 | const char *name; | |
1339 | ||
1340 | i_shdrp[d->this_idx] = &d->this_hdr; | |
1341 | if (d->rel_idx != 0) | |
1342 | i_shdrp[d->rel_idx] = &d->rel_hdr; | |
1343 | ||
1344 | /* Fill in the sh_link and sh_info fields while we're at it. */ | |
1345 | ||
1346 | /* sh_link of a reloc section is the section index of the symbol | |
1347 | table. sh_info is the section index of the section to which | |
1348 | the relocation entries apply. */ | |
1349 | if (d->rel_idx != 0) | |
1350 | { | |
1351 | d->rel_hdr.sh_link = t->symtab_section; | |
1352 | d->rel_hdr.sh_info = d->this_idx; | |
1353 | } | |
1354 | ||
1355 | switch (d->this_hdr.sh_type) | |
32090b8e | 1356 | { |
fa15568a ILT |
1357 | case SHT_REL: |
1358 | case SHT_RELA: | |
1359 | /* A reloc section which we are treating as a normal BFD | |
1360 | section. sh_link is the section index of the symbol | |
1361 | table. sh_info is the section index of the section to | |
1362 | which the relocation entries apply. We assume that an | |
1363 | allocated reloc section uses the dynamic symbol table. | |
1364 | FIXME: How can we be sure? */ | |
1365 | s = bfd_get_section_by_name (abfd, ".dynsym"); | |
1366 | if (s != NULL) | |
1367 | d->this_hdr.sh_link = elf_section_data (s)->this_idx; | |
1368 | ||
1369 | /* We look up the section the relocs apply to by name. */ | |
1370 | name = sec->name; | |
1371 | if (d->this_hdr.sh_type == SHT_REL) | |
1372 | name += 4; | |
1373 | else | |
1374 | name += 5; | |
1375 | s = bfd_get_section_by_name (abfd, name); | |
1376 | if (s != NULL) | |
1377 | d->this_hdr.sh_info = elf_section_data (s)->this_idx; | |
1378 | break; | |
1379 | ||
1380 | case SHT_STRTAB: | |
1381 | /* We assume that a section named .stab*str is a stabs | |
1382 | string section. We look for a section with the same name | |
1383 | but without the trailing ``str'', and set its sh_link | |
1384 | field to point to this section. */ | |
1385 | if (strncmp (sec->name, ".stab", sizeof ".stab" - 1) == 0 | |
1386 | && strcmp (sec->name + strlen (sec->name) - 3, "str") == 0) | |
1387 | { | |
1388 | size_t len; | |
1389 | char *alc; | |
1390 | ||
1391 | len = strlen (sec->name); | |
1392 | alc = (char *) malloc (len - 2); | |
1393 | if (alc == NULL) | |
1394 | { | |
1395 | bfd_set_error (bfd_error_no_memory); | |
1396 | return false; | |
1397 | } | |
1398 | strncpy (alc, sec->name, len - 3); | |
1399 | alc[len - 3] = '\0'; | |
1400 | s = bfd_get_section_by_name (abfd, alc); | |
1401 | free (alc); | |
1402 | if (s != NULL) | |
1403 | { | |
1404 | elf_section_data (s)->this_hdr.sh_link = d->this_idx; | |
1405 | ||
1406 | /* This is a .stab section. */ | |
1407 | elf_section_data (s)->this_hdr.sh_entsize = | |
1408 | 4 + 2 * (ARCH_SIZE / 8); | |
1409 | } | |
1410 | } | |
1411 | break; | |
1412 | ||
1413 | case SHT_DYNAMIC: | |
1414 | case SHT_DYNSYM: | |
1415 | /* sh_link is the section header index of the string table | |
1416 | used for the dynamic entries or symbol table. */ | |
1417 | s = bfd_get_section_by_name (abfd, ".dynstr"); | |
1418 | if (s != NULL) | |
1419 | d->this_hdr.sh_link = elf_section_data (s)->this_idx; | |
1420 | break; | |
1421 | ||
1422 | case SHT_HASH: | |
1423 | /* sh_link is the section header index of the symbol table | |
1424 | this hash table is for. */ | |
1425 | s = bfd_get_section_by_name (abfd, ".dynsym"); | |
1426 | if (s != NULL) | |
1427 | d->this_hdr.sh_link = elf_section_data (s)->this_idx; | |
1428 | break; | |
32090b8e KR |
1429 | } |
1430 | } | |
fa15568a ILT |
1431 | |
1432 | return true; | |
244ffee7 JK |
1433 | } |
1434 | ||
32090b8e KR |
1435 | /* Map symbol from it's internal number to the external number, moving |
1436 | all local symbols to be at the head of the list. */ | |
244ffee7 | 1437 | |
32090b8e | 1438 | static INLINE int |
062189c6 ILT |
1439 | sym_is_global (abfd, sym) |
1440 | bfd *abfd; | |
32090b8e KR |
1441 | asymbol *sym; |
1442 | { | |
062189c6 ILT |
1443 | /* If the backend has a special mapping, use it. */ |
1444 | if (get_elf_backend_data (abfd)->elf_backend_sym_is_global) | |
1445 | return ((*get_elf_backend_data (abfd)->elf_backend_sym_is_global) | |
1446 | (abfd, sym)); | |
1447 | ||
d24928c0 | 1448 | if (sym->flags & (BSF_GLOBAL | BSF_WEAK)) |
244ffee7 | 1449 | { |
32090b8e KR |
1450 | if (sym->flags & BSF_LOCAL) |
1451 | abort (); | |
1452 | return 1; | |
244ffee7 | 1453 | } |
d24928c0 KR |
1454 | if (sym->section == 0) |
1455 | { | |
1456 | /* Is this valid? */ | |
1457 | abort (); | |
1458 | ||
1459 | return 1; | |
1460 | } | |
32090b8e KR |
1461 | if (sym->section == &bfd_und_section) |
1462 | return 1; | |
1463 | if (bfd_is_com_section (sym->section)) | |
1464 | return 1; | |
1465 | if (sym->flags & (BSF_LOCAL | BSF_SECTION_SYM | BSF_FILE)) | |
1466 | return 0; | |
1467 | return 0; | |
1468 | } | |
244ffee7 | 1469 | |
9783e04a | 1470 | static boolean |
1c6042ee ILT |
1471 | elf_map_symbols (abfd) |
1472 | bfd *abfd; | |
32090b8e KR |
1473 | { |
1474 | int symcount = bfd_get_symcount (abfd); | |
1475 | asymbol **syms = bfd_get_outsymbols (abfd); | |
d24928c0 | 1476 | asymbol **sect_syms; |
32090b8e KR |
1477 | int num_locals = 0; |
1478 | int num_globals = 0; | |
1479 | int num_locals2 = 0; | |
1480 | int num_globals2 = 0; | |
d24928c0 | 1481 | int max_index = 0; |
32090b8e | 1482 | int num_sections = 0; |
d24928c0 | 1483 | Elf_Sym_Extra *sym_extra; |
32090b8e KR |
1484 | int idx; |
1485 | asection *asect; | |
6a3eb9b6 | 1486 | |
32090b8e KR |
1487 | #ifdef DEBUG |
1488 | fprintf (stderr, "elf_map_symbols\n"); | |
1489 | fflush (stderr); | |
1490 | #endif | |
244ffee7 | 1491 | |
e621c5cc ILT |
1492 | /* Add local symbols for each section for which there are relocs. |
1493 | FIXME: How can we tell which sections have relocs at this point? | |
1494 | Will reloc_count always be accurate? Actually, I think most ELF | |
1495 | targets create section symbols for all sections anyhow. */ | |
32090b8e | 1496 | for (asect = abfd->sections; asect; asect = asect->next) |
244ffee7 | 1497 | { |
d24928c0 KR |
1498 | if (max_index < asect->index) |
1499 | max_index = asect->index; | |
244ffee7 JK |
1500 | } |
1501 | ||
d24928c0 KR |
1502 | max_index++; |
1503 | elf_num_section_syms (abfd) = max_index; | |
1504 | sect_syms = (asymbol **) bfd_zalloc (abfd, max_index * sizeof (asymbol *)); | |
1505 | elf_section_syms (abfd) = sect_syms; | |
1506 | ||
5e829a34 | 1507 | if (sect_syms == 0) |
9783e04a | 1508 | { |
d1ad85a6 | 1509 | bfd_set_error (bfd_error_no_memory); |
9783e04a DM |
1510 | return false; |
1511 | } | |
d24928c0 KR |
1512 | |
1513 | for (asect = abfd->sections; asect; asect = asect->next) | |
e621c5cc ILT |
1514 | { |
1515 | asymbol *sym = bfd_make_empty_symbol (abfd); | |
9783e04a DM |
1516 | if (!sym) |
1517 | { | |
d1ad85a6 | 1518 | bfd_set_error (bfd_error_no_memory); |
9783e04a DM |
1519 | return false; |
1520 | } | |
e621c5cc ILT |
1521 | sym->the_bfd = abfd; |
1522 | sym->name = asect->name; | |
1523 | sym->value = asect->vma; | |
1524 | sym->flags = BSF_SECTION_SYM; | |
1525 | sym->section = asect; | |
1526 | sect_syms[asect->index] = sym; | |
1527 | num_sections++; | |
d24928c0 | 1528 | #ifdef DEBUG |
e621c5cc ILT |
1529 | fprintf (stderr, |
1530 | "creating section symbol, name = %s, value = 0x%.8lx, index = %d, section = 0x%.8lx\n", | |
1531 | asect->name, (long) asect->vma, asect->index, (long) asect); | |
d24928c0 | 1532 | #endif |
e621c5cc | 1533 | } |
d24928c0 | 1534 | |
32090b8e | 1535 | if (num_sections) |
244ffee7 | 1536 | { |
32090b8e KR |
1537 | if (syms) |
1538 | syms = (asymbol **) bfd_realloc (abfd, syms, | |
1539 | ((symcount + num_sections + 1) | |
1540 | * sizeof (asymbol *))); | |
1541 | else | |
1542 | syms = (asymbol **) bfd_alloc (abfd, | |
1c6042ee | 1543 | (num_sections + 1) * sizeof (asymbol *)); |
9783e04a DM |
1544 | if (!syms) |
1545 | { | |
d1ad85a6 | 1546 | bfd_set_error (bfd_error_no_memory); |
9783e04a DM |
1547 | return false; |
1548 | } | |
244ffee7 | 1549 | |
32090b8e KR |
1550 | for (asect = abfd->sections; asect; asect = asect->next) |
1551 | { | |
d24928c0 KR |
1552 | if (sect_syms[asect->index]) |
1553 | syms[symcount++] = sect_syms[asect->index]; | |
32090b8e | 1554 | } |
244ffee7 | 1555 | |
32090b8e KR |
1556 | syms[symcount] = (asymbol *) 0; |
1557 | bfd_set_symtab (abfd, syms, symcount); | |
1558 | } | |
244ffee7 | 1559 | |
d24928c0 KR |
1560 | elf_sym_extra (abfd) = sym_extra |
1561 | = (Elf_Sym_Extra *) bfd_alloc (abfd, symcount * sizeof (Elf_Sym_Extra)); | |
9783e04a DM |
1562 | if (!sym_extra) |
1563 | { | |
d1ad85a6 | 1564 | bfd_set_error (bfd_error_no_memory); |
9783e04a DM |
1565 | return false; |
1566 | } | |
244ffee7 | 1567 | |
32090b8e KR |
1568 | /* Identify and classify all of the symbols. */ |
1569 | for (idx = 0; idx < symcount; idx++) | |
244ffee7 | 1570 | { |
062189c6 | 1571 | if (!sym_is_global (abfd, syms[idx])) |
32090b8e KR |
1572 | num_locals++; |
1573 | else | |
1574 | num_globals++; | |
244ffee7 | 1575 | } |
32090b8e KR |
1576 | |
1577 | /* Now provide mapping information. Add +1 for skipping over the | |
1578 | dummy symbol. */ | |
1579 | for (idx = 0; idx < symcount; idx++) | |
244ffee7 | 1580 | { |
1c6042ee | 1581 | syms[idx]->udata = (PTR) & sym_extra[idx]; |
062189c6 | 1582 | if (!sym_is_global (abfd, syms[idx])) |
d24928c0 | 1583 | sym_extra[idx].elf_sym_num = 1 + num_locals2++; |
32090b8e | 1584 | else |
d24928c0 | 1585 | sym_extra[idx].elf_sym_num = 1 + num_locals + num_globals2++; |
244ffee7 JK |
1586 | } |
1587 | ||
32090b8e KR |
1588 | elf_num_locals (abfd) = num_locals; |
1589 | elf_num_globals (abfd) = num_globals; | |
9783e04a | 1590 | return true; |
32090b8e | 1591 | } |
244ffee7 | 1592 | |
6ec3bb6a ILT |
1593 | /* Compute the file positions we are going to put the sections at, and |
1594 | otherwise prepare to begin writing out the ELF file. If LINK_INFO | |
1595 | is not NULL, this is being called by the ELF backend linker. */ | |
244ffee7 | 1596 | |
32090b8e | 1597 | static boolean |
6ec3bb6a | 1598 | elf_compute_section_file_positions (abfd, link_info) |
1c6042ee | 1599 | bfd *abfd; |
6ec3bb6a | 1600 | struct bfd_link_info *link_info; |
32090b8e | 1601 | { |
6ec3bb6a ILT |
1602 | struct elf_backend_data *bed = get_elf_backend_data (abfd); |
1603 | Elf_Internal_Shdr *shstrtab_hdr; | |
1604 | ||
1605 | if (abfd->output_has_begun) | |
1606 | return true; | |
1607 | ||
1608 | /* Do any elf backend specific processing first. */ | |
1609 | if (bed->elf_backend_begin_write_processing) | |
1610 | (*bed->elf_backend_begin_write_processing) (abfd); | |
1611 | ||
1612 | if (! prep_headers (abfd)) | |
1613 | return false; | |
1614 | ||
32090b8e | 1615 | bfd_map_over_sections (abfd, elf_fake_sections, 0); |
244ffee7 | 1616 | |
9783e04a DM |
1617 | if (!assign_section_numbers (abfd)) |
1618 | return false; | |
244ffee7 | 1619 | |
6ec3bb6a ILT |
1620 | /* The backend linker builds symbol table information itself. */ |
1621 | if (link_info == NULL) | |
1622 | { | |
1623 | if (! swap_out_syms (abfd)) | |
1624 | return false; | |
1625 | } | |
244ffee7 | 1626 | |
6ec3bb6a ILT |
1627 | shstrtab_hdr = &elf_tdata (abfd)->shstrtab_hdr; |
1628 | /* sh_name was set in prep_headers. */ | |
1629 | shstrtab_hdr->sh_type = SHT_STRTAB; | |
1630 | shstrtab_hdr->sh_flags = 0; | |
1631 | shstrtab_hdr->sh_addr = 0; | |
1632 | shstrtab_hdr->sh_size = elf_shstrtab (abfd)->length; | |
1633 | shstrtab_hdr->sh_entsize = 0; | |
1634 | shstrtab_hdr->sh_link = 0; | |
1635 | shstrtab_hdr->sh_info = 0; | |
1636 | /* sh_offset is set in assign_file_positions_for_symtabs_and_strtabs. */ | |
1637 | shstrtab_hdr->sh_addralign = 1; | |
1638 | shstrtab_hdr->contents = (PTR) elf_shstrtab (abfd)->tab; | |
1639 | ||
1640 | if (!assign_file_positions_except_relocs (abfd, | |
1641 | link_info == NULL ? true : false)) | |
9783e04a | 1642 | return false; |
32090b8e | 1643 | |
6ec3bb6a ILT |
1644 | abfd->output_has_begun = true; |
1645 | ||
32090b8e KR |
1646 | return true; |
1647 | } | |
1648 | ||
244ffee7 | 1649 | |
013dec1a ILT |
1650 | /* Align to the maximum file alignment that could be required for any |
1651 | ELF data structure. */ | |
1652 | ||
1653 | static INLINE file_ptr | |
1654 | align_file_position (off) | |
1655 | file_ptr off; | |
1656 | { | |
1657 | return (off + FILE_ALIGN - 1) & ~(FILE_ALIGN - 1); | |
1658 | } | |
1659 | ||
1660 | /* Assign a file position to a section, optionally aligning to the | |
1661 | required section alignment. */ | |
1662 | ||
32090b8e | 1663 | static INLINE file_ptr |
013dec1a | 1664 | assign_file_position_for_section (i_shdrp, offset, align) |
32090b8e KR |
1665 | Elf_Internal_Shdr *i_shdrp; |
1666 | file_ptr offset; | |
013dec1a | 1667 | boolean align; |
32090b8e | 1668 | { |
013dec1a ILT |
1669 | if (align) |
1670 | { | |
1671 | unsigned int al; | |
f035cc47 | 1672 | |
013dec1a ILT |
1673 | al = i_shdrp->sh_addralign; |
1674 | if (al > 1) | |
1675 | offset = BFD_ALIGN (offset, al); | |
1676 | } | |
1677 | i_shdrp->sh_offset = offset; | |
7b8106b4 ILT |
1678 | if (i_shdrp->rawdata != NULL) |
1679 | ((asection *) i_shdrp->rawdata)->filepos = offset; | |
300adb31 KR |
1680 | if (i_shdrp->sh_type != SHT_NOBITS) |
1681 | offset += i_shdrp->sh_size; | |
32090b8e | 1682 | return offset; |
244ffee7 JK |
1683 | } |
1684 | ||
013dec1a ILT |
1685 | /* Get the size of the program header. This is called by the linker |
1686 | before any of the section VMA's are set, so it can't calculate the | |
1687 | correct value for a strange memory layout. */ | |
01383fb4 | 1688 | |
013dec1a ILT |
1689 | static bfd_size_type |
1690 | get_program_header_size (abfd) | |
300adb31 | 1691 | bfd *abfd; |
300adb31 | 1692 | { |
013dec1a ILT |
1693 | size_t segs; |
1694 | asection *s; | |
300adb31 | 1695 | |
013dec1a ILT |
1696 | /* Assume we will need exactly two PT_LOAD segments: one for text |
1697 | and one for data. */ | |
1698 | segs = 2; | |
1699 | ||
1700 | s = bfd_get_section_by_name (abfd, ".interp"); | |
1701 | if (s != NULL && (s->flags & SEC_LOAD) != 0) | |
1702 | { | |
1703 | /* If we have a loadable interpreter section, we need a | |
1704 | PT_INTERP segment. In this case, assume we also need a | |
1705 | PT_PHDR segment, although that may not be true for all | |
1706 | targets. */ | |
1707 | segs += 2; | |
1708 | } | |
1709 | ||
1710 | if (bfd_get_section_by_name (abfd, ".dynamic") != NULL) | |
1711 | { | |
1712 | /* We need a PT_DYNAMIC segment. */ | |
1713 | ++segs; | |
1714 | } | |
1715 | ||
1716 | return segs * sizeof (Elf_External_Phdr); | |
300adb31 KR |
1717 | } |
1718 | ||
013dec1a ILT |
1719 | /* Create the program header. OFF is the file offset where the |
1720 | program header should be written. FIRST is the first loadable ELF | |
1721 | section. PHDR_SIZE is the size of the program header as returned | |
1722 | by get_program_header_size. */ | |
300adb31 | 1723 | |
013dec1a ILT |
1724 | static file_ptr |
1725 | map_program_segments (abfd, off, first, phdr_size) | |
300adb31 | 1726 | bfd *abfd; |
013dec1a ILT |
1727 | file_ptr off; |
1728 | Elf_Internal_Shdr *first; | |
1729 | bfd_size_type phdr_size; | |
300adb31 | 1730 | { |
6731b89c | 1731 | Elf_Internal_Phdr phdrs[10]; |
013dec1a | 1732 | unsigned int phdr_count; |
300adb31 | 1733 | Elf_Internal_Phdr *phdr; |
013dec1a ILT |
1734 | int phdr_size_adjust; |
1735 | unsigned int i; | |
1736 | Elf_Internal_Shdr **hdrpp; | |
1737 | asection *sinterp, *sdyn; | |
1738 | unsigned int last_type; | |
1739 | Elf_Internal_Ehdr *i_ehdrp; | |
1740 | ||
1741 | BFD_ASSERT ((abfd->flags & EXEC_P) != 0); | |
6731b89c ILT |
1742 | BFD_ASSERT (phdr_size / sizeof (Elf_Internal_Phdr) |
1743 | <= sizeof phdrs / sizeof (phdrs[0])); | |
013dec1a ILT |
1744 | |
1745 | phdr_count = 0; | |
1746 | phdr = phdrs; | |
1747 | ||
1748 | phdr_size_adjust = 0; | |
300adb31 | 1749 | |
013dec1a ILT |
1750 | /* If we have a loadable .interp section, we must create a PT_INTERP |
1751 | segment which must precede all PT_LOAD segments. We assume that | |
1752 | we must also create a PT_PHDR segment, although that may not be | |
1753 | true for all targets. */ | |
1754 | sinterp = bfd_get_section_by_name (abfd, ".interp"); | |
1755 | if (sinterp != NULL && (sinterp->flags & SEC_LOAD) != 0) | |
80425e6c | 1756 | { |
013dec1a ILT |
1757 | BFD_ASSERT (first != NULL); |
1758 | ||
1759 | phdr->p_type = PT_PHDR; | |
1760 | ||
1761 | phdr->p_offset = off; | |
1762 | ||
1763 | /* Account for any adjustment made because of the alignment of | |
1764 | the first loadable section. */ | |
1765 | phdr_size_adjust = (first->sh_offset - phdr_size) - off; | |
1766 | BFD_ASSERT (phdr_size_adjust >= 0 && phdr_size_adjust < 128); | |
1767 | ||
1768 | /* The program header precedes all loadable sections. This lets | |
1769 | us compute its loadable address. This depends on the linker | |
1770 | script. */ | |
1771 | phdr->p_vaddr = first->sh_addr - (phdr_size + phdr_size_adjust); | |
1772 | ||
1773 | phdr->p_paddr = 0; | |
1774 | phdr->p_filesz = phdr_size; | |
1775 | phdr->p_memsz = phdr_size; | |
1776 | ||
1777 | /* FIXME: UnixWare and Solaris set PF_X, Irix 5 does not. */ | |
1778 | phdr->p_flags = PF_R | PF_X; | |
1779 | ||
1780 | phdr->p_align = FILE_ALIGN; | |
1781 | BFD_ASSERT ((phdr->p_vaddr - phdr->p_offset) % FILE_ALIGN == 0); | |
1782 | ||
1783 | /* Include the ELF header in the first loadable segment. */ | |
1784 | phdr_size_adjust += off; | |
1785 | ||
1786 | ++phdr_count; | |
1787 | ++phdr; | |
1788 | ||
1789 | phdr->p_type = PT_INTERP; | |
1790 | phdr->p_offset = sinterp->filepos; | |
1791 | phdr->p_vaddr = sinterp->vma; | |
1792 | phdr->p_paddr = 0; | |
1793 | phdr->p_filesz = sinterp->_raw_size; | |
1794 | phdr->p_memsz = sinterp->_raw_size; | |
1795 | phdr->p_flags = PF_R; | |
1796 | phdr->p_align = 1 << bfd_get_section_alignment (abfd, sinterp); | |
1797 | ||
1798 | ++phdr_count; | |
1799 | ++phdr; | |
80425e6c | 1800 | } |
013dec1a ILT |
1801 | |
1802 | /* Look through the sections to see how they will be divided into | |
1803 | program segments. The sections must be arranged in order by | |
1804 | sh_addr for this to work correctly. */ | |
1805 | phdr->p_type = PT_NULL; | |
1806 | last_type = SHT_PROGBITS; | |
1807 | for (i = 1, hdrpp = elf_elfsections (abfd) + 1; | |
1808 | i < elf_elfheader (abfd)->e_shnum; | |
1809 | i++, hdrpp++) | |
300adb31 | 1810 | { |
013dec1a ILT |
1811 | Elf_Internal_Shdr *hdr; |
1812 | ||
1813 | hdr = *hdrpp; | |
1814 | ||
1815 | /* Ignore any section which will not be part of the process | |
1816 | image. */ | |
1817 | if ((hdr->sh_flags & SHF_ALLOC) == 0) | |
1818 | continue; | |
1819 | ||
1820 | /* If this section fits in the segment we are constructing, add | |
1821 | it in. */ | |
1822 | if (phdr->p_type != PT_NULL | |
1823 | && (hdr->sh_offset - (phdr->p_offset + phdr->p_memsz) | |
1824 | == hdr->sh_addr - (phdr->p_vaddr + phdr->p_memsz)) | |
1825 | && (last_type != SHT_NOBITS || hdr->sh_type == SHT_NOBITS)) | |
300adb31 | 1826 | { |
013dec1a ILT |
1827 | bfd_size_type adjust; |
1828 | ||
1829 | adjust = hdr->sh_addr - (phdr->p_vaddr + phdr->p_memsz); | |
1830 | phdr->p_memsz += hdr->sh_size + adjust; | |
1831 | if (hdr->sh_type != SHT_NOBITS) | |
1832 | phdr->p_filesz += hdr->sh_size + adjust; | |
1833 | if ((hdr->sh_flags & SHF_WRITE) != 0) | |
1834 | phdr->p_flags |= PF_W; | |
1835 | if ((hdr->sh_flags & SHF_EXECINSTR) != 0) | |
1836 | phdr->p_flags |= PF_X; | |
1837 | last_type = hdr->sh_type; | |
300adb31 KR |
1838 | continue; |
1839 | } | |
300adb31 | 1840 | |
013dec1a ILT |
1841 | /* If we have a segment, move to the next one. */ |
1842 | if (phdr->p_type != PT_NULL) | |
300adb31 | 1843 | { |
013dec1a ILT |
1844 | ++phdr; |
1845 | ++phdr_count; | |
300adb31 | 1846 | } |
013dec1a ILT |
1847 | |
1848 | /* Start a new segment. */ | |
1849 | phdr->p_type = PT_LOAD; | |
1850 | phdr->p_offset = hdr->sh_offset; | |
1851 | phdr->p_vaddr = hdr->sh_addr; | |
1852 | phdr->p_paddr = 0; | |
1853 | if (hdr->sh_type == SHT_NOBITS) | |
1854 | phdr->p_filesz = 0; | |
1855 | else | |
1856 | phdr->p_filesz = hdr->sh_size; | |
1857 | phdr->p_memsz = hdr->sh_size; | |
1858 | phdr->p_flags = PF_R; | |
1859 | if ((hdr->sh_flags & SHF_WRITE) != 0) | |
1860 | phdr->p_flags |= PF_W; | |
1861 | if ((hdr->sh_flags & SHF_EXECINSTR) != 0) | |
1862 | phdr->p_flags |= PF_X; | |
1863 | phdr->p_align = get_elf_backend_data (abfd)->maxpagesize; | |
1864 | ||
1865 | if (hdr == first | |
1866 | && sinterp != NULL | |
1867 | && (sinterp->flags & SEC_LOAD) != 0) | |
2f3189e7 | 1868 | { |
013dec1a ILT |
1869 | phdr->p_offset -= phdr_size + phdr_size_adjust; |
1870 | phdr->p_vaddr -= phdr_size + phdr_size_adjust; | |
1871 | phdr->p_filesz += phdr_size + phdr_size_adjust; | |
1872 | phdr->p_memsz += phdr_size + phdr_size_adjust; | |
2f3189e7 | 1873 | } |
300adb31 | 1874 | |
013dec1a | 1875 | last_type = hdr->sh_type; |
300adb31 | 1876 | } |
300adb31 | 1877 | |
013dec1a ILT |
1878 | if (phdr->p_type != PT_NULL) |
1879 | { | |
1880 | ++phdr; | |
1881 | ++phdr_count; | |
1882 | } | |
1883 | ||
1884 | /* If we have a .dynamic section, create a PT_DYNAMIC segment. */ | |
1885 | sdyn = bfd_get_section_by_name (abfd, ".dynamic"); | |
1886 | if (sdyn != NULL && (sdyn->flags & SEC_LOAD) != 0) | |
1887 | { | |
1888 | phdr->p_type = PT_DYNAMIC; | |
1889 | phdr->p_offset = sdyn->filepos; | |
1890 | phdr->p_vaddr = sdyn->vma; | |
1891 | phdr->p_paddr = 0; | |
1892 | phdr->p_filesz = sdyn->_raw_size; | |
1893 | phdr->p_memsz = sdyn->_raw_size; | |
1894 | phdr->p_flags = PF_R; | |
1895 | if ((sdyn->flags & SEC_READONLY) == 0) | |
1896 | phdr->p_flags |= PF_W; | |
1897 | if ((sdyn->flags & SEC_CODE) != 0) | |
1898 | phdr->p_flags |= PF_X; | |
1899 | phdr->p_align = 1 << bfd_get_section_alignment (abfd, sdyn); | |
1900 | ||
1901 | ++phdr; | |
1902 | ++phdr_count; | |
1903 | } | |
1904 | ||
013dec1a ILT |
1905 | /* Make sure the return value from get_program_header_size matches |
1906 | what we computed here. */ | |
5315c428 | 1907 | if (phdr_count != phdr_size / sizeof (Elf_External_Phdr)) |
013dec1a ILT |
1908 | abort (); |
1909 | ||
1910 | /* Set up program header information. */ | |
1911 | i_ehdrp = elf_elfheader (abfd); | |
1912 | i_ehdrp->e_phentsize = sizeof (Elf_External_Phdr); | |
1913 | i_ehdrp->e_phoff = off; | |
1914 | i_ehdrp->e_phnum = phdr_count; | |
1915 | ||
1916 | /* Save the program headers away. I don't think anybody uses this | |
1917 | information right now. */ | |
1918 | elf_tdata (abfd)->phdr = ((Elf_Internal_Phdr *) | |
1919 | bfd_alloc (abfd, | |
1920 | (phdr_count | |
1921 | * sizeof (Elf_Internal_Phdr)))); | |
1922 | if (elf_tdata (abfd)->phdr == NULL && phdr_count != 0) | |
1923 | { | |
1924 | bfd_set_error (bfd_error_no_memory); | |
1925 | return (file_ptr) -1; | |
1926 | } | |
1927 | memcpy (elf_tdata (abfd)->phdr, phdrs, | |
1928 | phdr_count * sizeof (Elf_Internal_Phdr)); | |
1929 | ||
1930 | /* Write out the program headers. */ | |
1931 | if (bfd_seek (abfd, off, SEEK_SET) != 0) | |
1932 | return (file_ptr) -1; | |
1933 | ||
1934 | for (i = 0, phdr = phdrs; i < phdr_count; i++, phdr++) | |
1935 | { | |
1936 | Elf_External_Phdr extphdr; | |
1937 | ||
1938 | elf_swap_phdr_out (abfd, phdr, &extphdr); | |
1939 | if (bfd_write (&extphdr, sizeof (Elf_External_Phdr), 1, abfd) | |
1940 | != sizeof (Elf_External_Phdr)) | |
1941 | return (file_ptr) -1; | |
1942 | } | |
1943 | ||
1944 | return off + phdr_count * sizeof (Elf_External_Phdr); | |
300adb31 KR |
1945 | } |
1946 | ||
013dec1a ILT |
1947 | /* Work out the file positions of all the sections. This is called by |
1948 | elf_compute_section_file_positions. All the section sizes and VMAs | |
1949 | must be known before this is called. | |
1950 | ||
1951 | We do not consider reloc sections at this point, unless they form | |
1952 | part of the loadable image. Reloc sections are assigned file | |
1953 | positions in assign_file_positions_for_relocs, which is called by | |
1954 | write_object_contents and final_link. | |
1955 | ||
1956 | If DOSYMS is false, we do not assign file positions for the symbol | |
1957 | table or the string table. */ | |
1958 | ||
9783e04a | 1959 | static boolean |
6ec3bb6a | 1960 | assign_file_positions_except_relocs (abfd, dosyms) |
32090b8e | 1961 | bfd *abfd; |
6ec3bb6a | 1962 | boolean dosyms; |
244ffee7 | 1963 | { |
013dec1a ILT |
1964 | struct elf_obj_tdata * const tdata = elf_tdata (abfd); |
1965 | Elf_Internal_Ehdr * const i_ehdrp = elf_elfheader (abfd); | |
1966 | Elf_Internal_Shdr ** const i_shdrpp = elf_elfsections (abfd); | |
32090b8e | 1967 | file_ptr off; |
32090b8e | 1968 | |
013dec1a | 1969 | /* Start after the ELF header. */ |
32090b8e | 1970 | off = i_ehdrp->e_ehsize; |
300adb31 | 1971 | |
013dec1a | 1972 | if ((abfd->flags & EXEC_P) == 0) |
300adb31 | 1973 | { |
013dec1a ILT |
1974 | Elf_Internal_Shdr **hdrpp; |
1975 | unsigned int i; | |
062189c6 | 1976 | |
013dec1a ILT |
1977 | /* We are not creating an executable, which means that we are |
1978 | not creating a program header, and that the actual order of | |
1979 | the sections in the file is unimportant. */ | |
1980 | for (i = 1, hdrpp = i_shdrpp + 1; i < i_ehdrp->e_shnum; i++, hdrpp++) | |
244ffee7 | 1981 | { |
013dec1a ILT |
1982 | Elf_Internal_Shdr *hdr; |
1983 | ||
1984 | hdr = *hdrpp; | |
1985 | if (hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA) | |
300adb31 | 1986 | { |
013dec1a | 1987 | hdr->sh_offset = -1; |
300adb31 KR |
1988 | continue; |
1989 | } | |
013dec1a ILT |
1990 | if (! dosyms |
1991 | && (i == tdata->symtab_section | |
1992 | || i == tdata->strtab_section)) | |
300adb31 | 1993 | { |
013dec1a ILT |
1994 | hdr->sh_offset = -1; |
1995 | continue; | |
300adb31 | 1996 | } |
013dec1a ILT |
1997 | |
1998 | off = assign_file_position_for_section (hdr, off, true); | |
300adb31 | 1999 | } |
300adb31 | 2000 | } |
013dec1a | 2001 | else |
300adb31 | 2002 | { |
013dec1a ILT |
2003 | file_ptr phdr_off; |
2004 | bfd_size_type phdr_size; | |
2005 | bfd_vma maxpagesize; | |
2006 | Elf_Internal_Shdr **hdrpp; | |
2007 | unsigned int i; | |
2008 | Elf_Internal_Shdr *first; | |
2009 | file_ptr phdr_map; | |
2010 | ||
2011 | /* We are creating an executable. We must create a program | |
2012 | header. We can't actually create the program header until we | |
2013 | have set the file positions for the sections, but we can | |
2014 | figure out how big it is going to be. */ | |
2015 | off = align_file_position (off); | |
2016 | phdr_size = get_program_header_size (abfd); | |
2017 | if (phdr_size == (file_ptr) -1) | |
9783e04a | 2018 | return false; |
013dec1a ILT |
2019 | phdr_off = off; |
2020 | off += phdr_size; | |
2021 | ||
2022 | maxpagesize = get_elf_backend_data (abfd)->maxpagesize; | |
2023 | if (maxpagesize == 0) | |
2024 | maxpagesize = 1; | |
2025 | ||
2026 | /* FIXME: We might want to sort the sections on the sh_addr | |
2027 | field here. For now, we just assume that the linker will | |
2028 | create the sections in an appropriate order. */ | |
2029 | ||
2030 | /* Assign file positions in two passes. In the first pass, we | |
2031 | assign a file position to every section which forms part of | |
2032 | the executable image. */ | |
2033 | first = NULL; | |
2034 | for (i = 1, hdrpp = i_shdrpp + 1; i < i_ehdrp->e_shnum; i++, hdrpp++) | |
2035 | { | |
2036 | Elf_Internal_Shdr *hdr; | |
300adb31 | 2037 | |
013dec1a ILT |
2038 | hdr = *hdrpp; |
2039 | if ((hdr->sh_flags & SHF_ALLOC) == 0) | |
2040 | continue; | |
2041 | ||
2042 | if (first == NULL) | |
2043 | first = hdr; | |
2044 | ||
2045 | if ((abfd->flags & D_PAGED) != 0) | |
2046 | { | |
2047 | /* The section VMA must equal the file position modulo | |
2048 | the page size. This is required by the program | |
2049 | header. */ | |
2050 | off += (hdr->sh_addr - off) % maxpagesize; | |
2051 | } | |
300adb31 | 2052 | |
013dec1a ILT |
2053 | off = assign_file_position_for_section (hdr, off, false); |
2054 | } | |
300adb31 | 2055 | |
013dec1a ILT |
2056 | /* Assign file positions to all the sections which do not form |
2057 | part of the loadable image, except for the relocs. */ | |
2058 | for (i = 1, hdrpp = i_shdrpp + 1; i < i_ehdrp->e_shnum; i++, hdrpp++) | |
300adb31 | 2059 | { |
013dec1a ILT |
2060 | Elf_Internal_Shdr *hdr; |
2061 | ||
2062 | hdr = *hdrpp; | |
2063 | if ((hdr->sh_flags & SHF_ALLOC) != 0) | |
2064 | continue; | |
2065 | if (hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA) | |
2066 | { | |
2067 | hdr->sh_offset = -1; | |
2068 | continue; | |
2069 | } | |
2070 | if (! dosyms | |
2071 | && (i == tdata->symtab_section | |
2072 | || i == tdata->strtab_section)) | |
2073 | { | |
2074 | hdr->sh_offset = -1; | |
2075 | continue; | |
2076 | } | |
2077 | ||
2078 | off = assign_file_position_for_section (hdr, off, true); | |
300adb31 | 2079 | } |
013dec1a ILT |
2080 | |
2081 | phdr_map = map_program_segments (abfd, phdr_off, first, phdr_size); | |
2082 | if (phdr_map == (file_ptr) -1) | |
2083 | return false; | |
2084 | BFD_ASSERT (phdr_map == phdr_off + phdr_size); | |
244ffee7 | 2085 | } |
013dec1a ILT |
2086 | |
2087 | /* Place the section headers. */ | |
2088 | off = align_file_position (off); | |
2089 | i_ehdrp->e_shoff = off; | |
2090 | off += i_ehdrp->e_shnum * i_ehdrp->e_shentsize; | |
2091 | ||
32090b8e | 2092 | elf_tdata (abfd)->next_file_pos = off; |
013dec1a | 2093 | |
9783e04a | 2094 | return true; |
244ffee7 JK |
2095 | } |
2096 | ||
32090b8e KR |
2097 | static boolean |
2098 | prep_headers (abfd) | |
2099 | bfd *abfd; | |
2100 | { | |
32090b8e | 2101 | Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */ |
1c6042ee | 2102 | Elf_Internal_Phdr *i_phdrp = 0; /* Program header table, internal form */ |
32090b8e | 2103 | Elf_Internal_Shdr **i_shdrp; /* Section header table, internal form */ |
32090b8e | 2104 | int count; |
32090b8e | 2105 | struct strtab *shstrtab; |
244ffee7 | 2106 | |
32090b8e KR |
2107 | i_ehdrp = elf_elfheader (abfd); |
2108 | i_shdrp = elf_elfsections (abfd); | |
244ffee7 | 2109 | |
32090b8e | 2110 | shstrtab = bfd_new_strtab (abfd); |
b9d5cdf0 DM |
2111 | if (!shstrtab) |
2112 | return false; | |
1c6042ee | 2113 | |
32090b8e | 2114 | elf_shstrtab (abfd) = shstrtab; |
244ffee7 | 2115 | |
32090b8e KR |
2116 | i_ehdrp->e_ident[EI_MAG0] = ELFMAG0; |
2117 | i_ehdrp->e_ident[EI_MAG1] = ELFMAG1; | |
2118 | i_ehdrp->e_ident[EI_MAG2] = ELFMAG2; | |
2119 | i_ehdrp->e_ident[EI_MAG3] = ELFMAG3; | |
244ffee7 | 2120 | |
32090b8e KR |
2121 | i_ehdrp->e_ident[EI_CLASS] = ELFCLASS; |
2122 | i_ehdrp->e_ident[EI_DATA] = | |
2123 | abfd->xvec->byteorder_big_p ? ELFDATA2MSB : ELFDATA2LSB; | |
2124 | i_ehdrp->e_ident[EI_VERSION] = EV_CURRENT; | |
244ffee7 | 2125 | |
32090b8e KR |
2126 | for (count = EI_PAD; count < EI_NIDENT; count++) |
2127 | i_ehdrp->e_ident[count] = 0; | |
244ffee7 | 2128 | |
32090b8e KR |
2129 | i_ehdrp->e_type = (abfd->flags & EXEC_P) ? ET_EXEC : ET_REL; |
2130 | switch (bfd_get_arch (abfd)) | |
fce36137 | 2131 | { |
32090b8e KR |
2132 | case bfd_arch_unknown: |
2133 | i_ehdrp->e_machine = EM_NONE; | |
2134 | break; | |
2135 | case bfd_arch_sparc: | |
2136 | i_ehdrp->e_machine = EM_SPARC; | |
2137 | /* start-sanitize-v9 */ | |
2138 | #if ARCH_SIZE == 64 | |
2139 | i_ehdrp->e_machine = EM_SPARC64; | |
2140 | #endif | |
2141 | /* end-sanitize-v9 */ | |
2142 | break; | |
2143 | case bfd_arch_i386: | |
2144 | i_ehdrp->e_machine = EM_386; | |
2145 | break; | |
2146 | case bfd_arch_m68k: | |
2147 | i_ehdrp->e_machine = EM_68K; | |
2148 | break; | |
2149 | case bfd_arch_m88k: | |
2150 | i_ehdrp->e_machine = EM_88K; | |
2151 | break; | |
2152 | case bfd_arch_i860: | |
2153 | i_ehdrp->e_machine = EM_860; | |
2154 | break; | |
2155 | case bfd_arch_mips: /* MIPS Rxxxx */ | |
2156 | i_ehdrp->e_machine = EM_MIPS; /* only MIPS R3000 */ | |
2157 | break; | |
2158 | case bfd_arch_hppa: | |
459ae909 | 2159 | i_ehdrp->e_machine = EM_PARISC; |
32090b8e | 2160 | break; |
99ec1f66 ILT |
2161 | case bfd_arch_powerpc: |
2162 | i_ehdrp->e_machine = EM_CYGNUS_POWERPC; | |
2163 | break; | |
32090b8e KR |
2164 | /* also note that EM_M32, AT&T WE32100 is unknown to bfd */ |
2165 | default: | |
2166 | i_ehdrp->e_machine = EM_NONE; | |
fce36137 | 2167 | } |
32090b8e KR |
2168 | i_ehdrp->e_version = EV_CURRENT; |
2169 | i_ehdrp->e_ehsize = sizeof (Elf_External_Ehdr); | |
244ffee7 | 2170 | |
32090b8e KR |
2171 | /* no program header, for now. */ |
2172 | i_ehdrp->e_phoff = 0; | |
2173 | i_ehdrp->e_phentsize = 0; | |
2174 | i_ehdrp->e_phnum = 0; | |
244ffee7 | 2175 | |
32090b8e KR |
2176 | /* each bfd section is section header entry */ |
2177 | i_ehdrp->e_entry = bfd_get_start_address (abfd); | |
2178 | i_ehdrp->e_shentsize = sizeof (Elf_External_Shdr); | |
244ffee7 | 2179 | |
32090b8e KR |
2180 | /* if we're building an executable, we'll need a program header table */ |
2181 | if (abfd->flags & EXEC_P) | |
244ffee7 | 2182 | { |
300adb31 | 2183 | /* it all happens later */ |
32090b8e KR |
2184 | #if 0 |
2185 | i_ehdrp->e_phentsize = sizeof (Elf_External_Phdr); | |
244ffee7 | 2186 | |
32090b8e KR |
2187 | /* elf_build_phdrs() returns a (NULL-terminated) array of |
2188 | Elf_Internal_Phdrs */ | |
2189 | i_phdrp = elf_build_phdrs (abfd, i_ehdrp, i_shdrp, &i_ehdrp->e_phnum); | |
2190 | i_ehdrp->e_phoff = outbase; | |
2191 | outbase += i_ehdrp->e_phentsize * i_ehdrp->e_phnum; | |
2192 | #endif | |
244ffee7 | 2193 | } |
32090b8e | 2194 | else |
244ffee7 | 2195 | { |
32090b8e KR |
2196 | i_ehdrp->e_phentsize = 0; |
2197 | i_phdrp = 0; | |
2198 | i_ehdrp->e_phoff = 0; | |
244ffee7 JK |
2199 | } |
2200 | ||
32090b8e KR |
2201 | elf_tdata (abfd)->symtab_hdr.sh_name = bfd_add_to_strtab (abfd, shstrtab, |
2202 | ".symtab"); | |
2203 | elf_tdata (abfd)->strtab_hdr.sh_name = bfd_add_to_strtab (abfd, shstrtab, | |
2204 | ".strtab"); | |
2205 | elf_tdata (abfd)->shstrtab_hdr.sh_name = bfd_add_to_strtab (abfd, shstrtab, | |
2206 | ".shstrtab"); | |
6ec3bb6a ILT |
2207 | if (elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1 |
2208 | || elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1 | |
2209 | || elf_tdata (abfd)->shstrtab_hdr.sh_name == (unsigned int) -1) | |
2210 | return false; | |
2211 | ||
f035cc47 | 2212 | return true; |
244ffee7 JK |
2213 | } |
2214 | ||
b9d5cdf0 | 2215 | static boolean |
32090b8e KR |
2216 | swap_out_syms (abfd) |
2217 | bfd *abfd; | |
244ffee7 | 2218 | { |
9783e04a DM |
2219 | if (!elf_map_symbols (abfd)) |
2220 | return false; | |
244ffee7 | 2221 | |
32090b8e KR |
2222 | /* Dump out the symtabs. */ |
2223 | { | |
2224 | int symcount = bfd_get_symcount (abfd); | |
2225 | asymbol **syms = bfd_get_outsymbols (abfd); | |
2226 | struct strtab *stt = bfd_new_strtab (abfd); | |
2227 | Elf_Internal_Shdr *symtab_hdr; | |
2228 | Elf_Internal_Shdr *symstrtab_hdr; | |
2229 | Elf_External_Sym *outbound_syms; | |
2230 | int idx; | |
244ffee7 | 2231 | |
b9d5cdf0 DM |
2232 | if (!stt) |
2233 | return false; | |
32090b8e KR |
2234 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
2235 | symtab_hdr->sh_type = SHT_SYMTAB; | |
2236 | symtab_hdr->sh_entsize = sizeof (Elf_External_Sym); | |
2237 | symtab_hdr->sh_size = symtab_hdr->sh_entsize * (symcount + 1); | |
2238 | symtab_hdr->sh_info = elf_num_locals (abfd) + 1; | |
fa15568a | 2239 | symtab_hdr->sh_addralign = FILE_ALIGN; |
244ffee7 | 2240 | |
32090b8e KR |
2241 | symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr; |
2242 | symstrtab_hdr->sh_type = SHT_STRTAB; | |
244ffee7 | 2243 | |
32090b8e KR |
2244 | outbound_syms = (Elf_External_Sym *) |
2245 | bfd_alloc (abfd, (1 + symcount) * sizeof (Elf_External_Sym)); | |
9783e04a DM |
2246 | if (!outbound_syms) |
2247 | { | |
d1ad85a6 | 2248 | bfd_set_error (bfd_error_no_memory); |
9783e04a DM |
2249 | return false; |
2250 | } | |
32090b8e KR |
2251 | /* now generate the data (for "contents") */ |
2252 | { | |
2253 | /* Fill in zeroth symbol and swap it out. */ | |
2254 | Elf_Internal_Sym sym; | |
2255 | sym.st_name = 0; | |
2256 | sym.st_value = 0; | |
2257 | sym.st_size = 0; | |
2258 | sym.st_info = 0; | |
2259 | sym.st_other = 0; | |
2260 | sym.st_shndx = SHN_UNDEF; | |
2261 | elf_swap_symbol_out (abfd, &sym, outbound_syms); | |
244ffee7 | 2262 | } |
32090b8e KR |
2263 | for (idx = 0; idx < symcount; idx++) |
2264 | { | |
2265 | Elf_Internal_Sym sym; | |
2266 | bfd_vma value = syms[idx]->value; | |
244ffee7 | 2267 | |
32090b8e KR |
2268 | if (syms[idx]->flags & BSF_SECTION_SYM) |
2269 | /* Section symbols have no names. */ | |
2270 | sym.st_name = 0; | |
2271 | else | |
6ec3bb6a ILT |
2272 | { |
2273 | sym.st_name = bfd_add_to_strtab (abfd, stt, syms[idx]->name); | |
2274 | if (sym.st_name == (unsigned long) -1) | |
2275 | return false; | |
2276 | } | |
244ffee7 | 2277 | |
32090b8e | 2278 | if (bfd_is_com_section (syms[idx]->section)) |
244ffee7 | 2279 | { |
32090b8e KR |
2280 | /* ELF common symbols put the alignment into the `value' field, |
2281 | and the size into the `size' field. This is backwards from | |
2282 | how BFD handles it, so reverse it here. */ | |
2283 | sym.st_size = value; | |
2284 | /* Should retrieve this from somewhere... */ | |
2285 | sym.st_value = 16; | |
d4fb8fce ILT |
2286 | sym.st_shndx = elf_section_from_bfd_section (abfd, |
2287 | syms[idx]->section); | |
244ffee7 JK |
2288 | } |
2289 | else | |
2290 | { | |
32090b8e | 2291 | asection *sec = syms[idx]->section; |
e74034d8 | 2292 | elf_symbol_type *type_ptr; |
32090b8e | 2293 | int shndx; |
244ffee7 | 2294 | |
32090b8e KR |
2295 | if (sec->output_section) |
2296 | { | |
2297 | value += sec->output_offset; | |
2298 | sec = sec->output_section; | |
2299 | } | |
2300 | value += sec->vma; | |
2301 | sym.st_value = value; | |
e74034d8 KR |
2302 | type_ptr = elf_symbol_from (abfd, syms[idx]); |
2303 | sym.st_size = type_ptr ? type_ptr->internal_elf_sym.st_size : 0; | |
32090b8e KR |
2304 | sym.st_shndx = shndx = elf_section_from_bfd_section (abfd, sec); |
2305 | if (shndx == -1) | |
2306 | { | |
2307 | asection *sec2; | |
2308 | /* Writing this would be a hell of a lot easier if we had | |
2309 | some decent documentation on bfd, and knew what to expect | |
2310 | of the library, and what to demand of applications. For | |
2311 | example, it appears that `objcopy' might not set the | |
2312 | section of a symbol to be a section that is actually in | |
2313 | the output file. */ | |
2314 | sec2 = bfd_get_section_by_name (abfd, sec->name); | |
850584ad | 2315 | BFD_ASSERT (sec2 != 0); |
32090b8e | 2316 | sym.st_shndx = shndx = elf_section_from_bfd_section (abfd, sec2); |
850584ad | 2317 | BFD_ASSERT (shndx != -1); |
32090b8e KR |
2318 | } |
2319 | } | |
244ffee7 | 2320 | |
32090b8e | 2321 | if (bfd_is_com_section (syms[idx]->section)) |
38a5f510 | 2322 | sym.st_info = ELF_ST_INFO (STB_GLOBAL, STT_OBJECT); |
32090b8e KR |
2323 | else if (syms[idx]->section == &bfd_und_section) |
2324 | sym.st_info = ELF_ST_INFO (STB_GLOBAL, STT_NOTYPE); | |
32090b8e KR |
2325 | else if (syms[idx]->flags & BSF_SECTION_SYM) |
2326 | sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION); | |
2327 | else if (syms[idx]->flags & BSF_FILE) | |
2328 | sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE); | |
d24928c0 | 2329 | else |
32090b8e | 2330 | { |
d24928c0 KR |
2331 | int bind = STB_LOCAL; |
2332 | int type = STT_OBJECT; | |
2333 | unsigned int flags = syms[idx]->flags; | |
2334 | ||
2335 | if (flags & BSF_LOCAL) | |
2336 | bind = STB_LOCAL; | |
2337 | else if (flags & BSF_WEAK) | |
2338 | bind = STB_WEAK; | |
2339 | else if (flags & BSF_GLOBAL) | |
2340 | bind = STB_GLOBAL; | |
2341 | ||
2342 | if (flags & BSF_FUNCTION) | |
2343 | type = STT_FUNC; | |
2344 | ||
2345 | sym.st_info = ELF_ST_INFO (bind, type); | |
32090b8e | 2346 | } |
244ffee7 | 2347 | |
32090b8e KR |
2348 | sym.st_other = 0; |
2349 | elf_swap_symbol_out (abfd, &sym, | |
d24928c0 KR |
2350 | (outbound_syms |
2351 | + elf_sym_extra (abfd)[idx].elf_sym_num)); | |
32090b8e KR |
2352 | } |
2353 | ||
2354 | symtab_hdr->contents = (PTR) outbound_syms; | |
2355 | symstrtab_hdr->contents = (PTR) stt->tab; | |
2356 | symstrtab_hdr->sh_size = stt->length; | |
2357 | symstrtab_hdr->sh_type = SHT_STRTAB; | |
2358 | ||
2359 | symstrtab_hdr->sh_flags = 0; | |
2360 | symstrtab_hdr->sh_addr = 0; | |
2361 | symstrtab_hdr->sh_entsize = 0; | |
2362 | symstrtab_hdr->sh_link = 0; | |
2363 | symstrtab_hdr->sh_info = 0; | |
062189c6 | 2364 | symstrtab_hdr->sh_addralign = 1; |
32090b8e KR |
2365 | symstrtab_hdr->size = 0; |
2366 | } | |
2367 | ||
b9d5cdf0 | 2368 | return true; |
244ffee7 JK |
2369 | } |
2370 | ||
32090b8e KR |
2371 | static boolean |
2372 | write_shdrs_and_ehdr (abfd) | |
2373 | bfd *abfd; | |
244ffee7 | 2374 | { |
32090b8e KR |
2375 | Elf_External_Ehdr x_ehdr; /* Elf file header, external form */ |
2376 | Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */ | |
32090b8e KR |
2377 | Elf_External_Shdr *x_shdrp; /* Section header table, external form */ |
2378 | Elf_Internal_Shdr **i_shdrp; /* Section header table, internal form */ | |
68241b2b | 2379 | unsigned int count; |
32090b8e | 2380 | struct strtab *shstrtab; |
244ffee7 | 2381 | |
32090b8e KR |
2382 | i_ehdrp = elf_elfheader (abfd); |
2383 | i_shdrp = elf_elfsections (abfd); | |
2384 | shstrtab = elf_shstrtab (abfd); | |
2385 | ||
2386 | /* swap the header before spitting it out... */ | |
2387 | ||
2388 | #if DEBUG & 1 | |
2389 | elf_debug_file (i_ehdrp); | |
244ffee7 | 2390 | #endif |
32090b8e | 2391 | elf_swap_ehdr_out (abfd, i_ehdrp, &x_ehdr); |
4002f18a ILT |
2392 | if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0 |
2393 | || (bfd_write ((PTR) & x_ehdr, sizeof (x_ehdr), 1, abfd) | |
2394 | != sizeof (x_ehdr))) | |
2395 | return false; | |
244ffee7 | 2396 | |
32090b8e KR |
2397 | /* at this point we've concocted all the ELF sections... */ |
2398 | x_shdrp = (Elf_External_Shdr *) | |
2399 | bfd_alloc (abfd, sizeof (*x_shdrp) * (i_ehdrp->e_shnum)); | |
2400 | if (!x_shdrp) | |
2401 | { | |
d1ad85a6 | 2402 | bfd_set_error (bfd_error_no_memory); |
32090b8e KR |
2403 | return false; |
2404 | } | |
2405 | ||
2406 | for (count = 0; count < i_ehdrp->e_shnum; count++) | |
2407 | { | |
2408 | #if DEBUG & 2 | |
2409 | elf_debug_section (shstrtab->tab + i_shdrp[count]->sh_name, count, | |
2410 | i_shdrp[count]); | |
244ffee7 | 2411 | #endif |
32090b8e KR |
2412 | elf_swap_shdr_out (abfd, i_shdrp[count], x_shdrp + count); |
2413 | } | |
4002f18a ILT |
2414 | if (bfd_seek (abfd, (file_ptr) i_ehdrp->e_shoff, SEEK_SET) != 0 |
2415 | || (bfd_write ((PTR) x_shdrp, sizeof (*x_shdrp), i_ehdrp->e_shnum, abfd) | |
d909628b | 2416 | != sizeof (*x_shdrp) * i_ehdrp->e_shnum)) |
4002f18a ILT |
2417 | return false; |
2418 | ||
32090b8e | 2419 | /* need to dump the string table too... */ |
244ffee7 | 2420 | |
32090b8e KR |
2421 | return true; |
2422 | } | |
244ffee7 | 2423 | |
013dec1a ILT |
2424 | /* Assign file positions for all the reloc sections which are not part |
2425 | of the loadable file image. */ | |
2426 | ||
32090b8e KR |
2427 | static void |
2428 | assign_file_positions_for_relocs (abfd) | |
2429 | bfd *abfd; | |
2430 | { | |
013dec1a | 2431 | file_ptr off; |
68241b2b | 2432 | unsigned int i; |
013dec1a ILT |
2433 | Elf_Internal_Shdr **shdrpp; |
2434 | ||
2435 | off = elf_tdata (abfd)->next_file_pos; | |
2436 | ||
2437 | for (i = 1, shdrpp = elf_elfsections (abfd) + 1; | |
2438 | i < elf_elfheader (abfd)->e_shnum; | |
2439 | i++, shdrpp++) | |
32090b8e | 2440 | { |
013dec1a ILT |
2441 | Elf_Internal_Shdr *shdrp; |
2442 | ||
2443 | shdrp = *shdrpp; | |
2444 | if ((shdrp->sh_type == SHT_REL || shdrp->sh_type == SHT_RELA) | |
2445 | && shdrp->sh_offset == -1) | |
2446 | off = assign_file_position_for_section (shdrp, off, true); | |
32090b8e | 2447 | } |
013dec1a | 2448 | |
1c6042ee | 2449 | elf_tdata (abfd)->next_file_pos = off; |
32090b8e | 2450 | } |
244ffee7 | 2451 | |
32090b8e | 2452 | boolean |
1c6042ee ILT |
2453 | NAME(bfd_elf,write_object_contents) (abfd) |
2454 | bfd *abfd; | |
32090b8e | 2455 | { |
062189c6 | 2456 | struct elf_backend_data *bed = get_elf_backend_data (abfd); |
32090b8e KR |
2457 | Elf_Internal_Ehdr *i_ehdrp; |
2458 | Elf_Internal_Shdr **i_shdrp; | |
68241b2b | 2459 | unsigned int count; |
244ffee7 | 2460 | |
6ec3bb6a ILT |
2461 | if (! abfd->output_has_begun |
2462 | && ! elf_compute_section_file_positions (abfd, | |
2463 | (struct bfd_link_info *) NULL)) | |
2464 | return false; | |
244ffee7 | 2465 | |
32090b8e KR |
2466 | i_shdrp = elf_elfsections (abfd); |
2467 | i_ehdrp = elf_elfheader (abfd); | |
244ffee7 | 2468 | |
32090b8e | 2469 | bfd_map_over_sections (abfd, write_relocs, (PTR) 0); |
32090b8e | 2470 | assign_file_positions_for_relocs (abfd); |
244ffee7 | 2471 | |
32090b8e | 2472 | /* After writing the headers, we need to write the sections too... */ |
062189c6 | 2473 | for (count = 1; count < i_ehdrp->e_shnum; count++) |
e621c5cc | 2474 | { |
e621c5cc ILT |
2475 | if (bed->elf_backend_section_processing) |
2476 | (*bed->elf_backend_section_processing) (abfd, i_shdrp[count]); | |
2477 | if (i_shdrp[count]->contents) | |
2478 | { | |
4002f18a ILT |
2479 | if (bfd_seek (abfd, i_shdrp[count]->sh_offset, SEEK_SET) != 0 |
2480 | || (bfd_write (i_shdrp[count]->contents, i_shdrp[count]->sh_size, | |
2481 | 1, abfd) | |
2482 | != i_shdrp[count]->sh_size)) | |
2483 | return false; | |
e621c5cc ILT |
2484 | } |
2485 | } | |
062189c6 ILT |
2486 | |
2487 | if (bed->elf_backend_final_write_processing) | |
2488 | (*bed->elf_backend_final_write_processing) (abfd); | |
2489 | ||
32090b8e KR |
2490 | return write_shdrs_and_ehdr (abfd); |
2491 | } | |
244ffee7 | 2492 | |
32090b8e KR |
2493 | /* Given an index of a section, retrieve a pointer to it. Note |
2494 | that for our purposes, sections are indexed by {1, 2, ...} with | |
2495 | 0 being an illegal index. */ | |
244ffee7 | 2496 | |
32090b8e KR |
2497 | /* In the original, each ELF section went into exactly one BFD |
2498 | section. This doesn't really make sense, so we need a real mapping. | |
2499 | The mapping has to hide in the Elf_Internal_Shdr since asection | |
2500 | doesn't have anything like a tdata field... */ | |
244ffee7 | 2501 | |
2e03ce18 | 2502 | static asection * |
1c6042ee ILT |
2503 | section_from_elf_index (abfd, index) |
2504 | bfd *abfd; | |
2505 | unsigned int index; | |
32090b8e KR |
2506 | { |
2507 | /* @@ Is bfd_com_section really correct in all the places it could | |
2508 | be returned from this routine? */ | |
244ffee7 | 2509 | |
32090b8e KR |
2510 | if (index == SHN_ABS) |
2511 | return &bfd_com_section; /* not abs? */ | |
2512 | if (index == SHN_COMMON) | |
2513 | return &bfd_com_section; | |
244ffee7 | 2514 | |
32090b8e | 2515 | if (index > elf_elfheader (abfd)->e_shnum) |
2e03ce18 | 2516 | return NULL; |
244ffee7 JK |
2517 | |
2518 | { | |
32090b8e | 2519 | Elf_Internal_Shdr *hdr = elf_elfsections (abfd)[index]; |
244ffee7 | 2520 | |
32090b8e | 2521 | switch (hdr->sh_type) |
244ffee7 | 2522 | { |
32090b8e KR |
2523 | /* ELF sections that map to BFD sections */ |
2524 | case SHT_PROGBITS: | |
2525 | case SHT_NOBITS: | |
013dec1a ILT |
2526 | case SHT_HASH: |
2527 | case SHT_DYNAMIC: | |
2e03ce18 ILT |
2528 | if (hdr->rawdata == NULL) |
2529 | { | |
2530 | if (! bfd_section_from_shdr (abfd, index)) | |
2531 | return NULL; | |
2532 | } | |
32090b8e | 2533 | return (struct sec *) hdr->rawdata; |
244ffee7 | 2534 | |
32090b8e KR |
2535 | default: |
2536 | return (struct sec *) &bfd_abs_section; | |
244ffee7 | 2537 | } |
244ffee7 | 2538 | } |
32090b8e | 2539 | } |
244ffee7 | 2540 | |
32090b8e KR |
2541 | /* given a section, search the header to find them... */ |
2542 | static int | |
1c6042ee ILT |
2543 | elf_section_from_bfd_section (abfd, asect) |
2544 | bfd *abfd; | |
2545 | struct sec *asect; | |
32090b8e KR |
2546 | { |
2547 | Elf_Internal_Shdr **i_shdrp = elf_elfsections (abfd); | |
2548 | int index; | |
2549 | Elf_Internal_Shdr *hdr; | |
2550 | int maxindex = elf_elfheader (abfd)->e_shnum; | |
244ffee7 | 2551 | |
32090b8e KR |
2552 | if (asect == &bfd_abs_section) |
2553 | return SHN_ABS; | |
2554 | if (asect == &bfd_com_section) | |
2555 | return SHN_COMMON; | |
2556 | if (asect == &bfd_und_section) | |
2557 | return SHN_UNDEF; | |
244ffee7 | 2558 | |
32090b8e KR |
2559 | for (index = 0; index < maxindex; index++) |
2560 | { | |
2561 | hdr = i_shdrp[index]; | |
2562 | switch (hdr->sh_type) | |
2563 | { | |
2564 | /* ELF sections that map to BFD sections */ | |
2565 | case SHT_PROGBITS: | |
2566 | case SHT_NOBITS: | |
e621c5cc | 2567 | case SHT_NOTE: |
013dec1a ILT |
2568 | case SHT_HASH: |
2569 | case SHT_DYNAMIC: | |
fa15568a | 2570 | case SHT_DYNSYM: |
32090b8e KR |
2571 | if (hdr->rawdata) |
2572 | { | |
2573 | if (((struct sec *) (hdr->rawdata)) == asect) | |
2574 | return index; | |
2575 | } | |
2576 | break; | |
01383fb4 | 2577 | |
fa15568a ILT |
2578 | case SHT_REL: |
2579 | case SHT_RELA: | |
2580 | /* We sometimes map a reloc section to a BFD section. */ | |
e6667b2b | 2581 | if (hdr->sh_link != elf_onesymtab (abfd) |
fa15568a ILT |
2582 | && (asection *) hdr->rawdata == asect) |
2583 | return index; | |
2584 | break; | |
2585 | ||
01383fb4 | 2586 | case SHT_STRTAB: |
fa15568a ILT |
2587 | /* We map most string tables to BFD sections. */ |
2588 | if (index != elf_elfheader (abfd)->e_shstrndx | |
2589 | && index != elf_onesymtab (abfd) | |
2590 | && (asection *) hdr->rawdata == asect) | |
2591 | return index; | |
2592 | ||
01383fb4 | 2593 | /* FALL THROUGH */ |
32090b8e | 2594 | default: |
e621c5cc ILT |
2595 | { |
2596 | struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
2597 | ||
2598 | if (bed->elf_backend_section_from_bfd_section) | |
f035cc47 ILT |
2599 | { |
2600 | int retval; | |
2601 | ||
2602 | retval = index; | |
2603 | if ((*bed->elf_backend_section_from_bfd_section) | |
2604 | (abfd, hdr, asect, &retval)) | |
2605 | return retval; | |
2606 | } | |
e621c5cc | 2607 | } |
32090b8e KR |
2608 | break; |
2609 | } | |
2610 | } | |
2611 | return -1; | |
2612 | } | |
244ffee7 | 2613 | |
32090b8e KR |
2614 | /* given a symbol, return the bfd index for that symbol. */ |
2615 | static int | |
1c6042ee ILT |
2616 | elf_symbol_from_bfd_symbol (abfd, asym_ptr_ptr) |
2617 | bfd *abfd; | |
2618 | struct symbol_cache_entry **asym_ptr_ptr; | |
32090b8e KR |
2619 | { |
2620 | struct symbol_cache_entry *asym_ptr = *asym_ptr_ptr; | |
32090b8e | 2621 | int idx; |
d24928c0 | 2622 | flagword flags = asym_ptr->flags; |
32090b8e | 2623 | |
d24928c0 KR |
2624 | /* When gas creates relocations against local labels, it creates its |
2625 | own symbol for the section, but does put the symbol into the | |
e621c5cc ILT |
2626 | symbol chain, so udata is 0. When the linker is generating |
2627 | relocatable output, this section symbol may be for one of the | |
2628 | input sections rather than the output section. */ | |
d24928c0 KR |
2629 | if (asym_ptr->udata == (PTR) 0 |
2630 | && (flags & BSF_SECTION_SYM) | |
e621c5cc ILT |
2631 | && asym_ptr->section) |
2632 | { | |
2633 | int indx; | |
2634 | ||
2635 | if (asym_ptr->section->output_section != NULL) | |
2636 | indx = asym_ptr->section->output_section->index; | |
2637 | else | |
2638 | indx = asym_ptr->section->index; | |
2639 | if (elf_section_syms (abfd)[indx]) | |
2640 | asym_ptr->udata = elf_section_syms (abfd)[indx]->udata; | |
01383fb4 | 2641 | } |
e621c5cc | 2642 | |
d24928c0 | 2643 | if (asym_ptr->udata) |
1c6042ee | 2644 | idx = ((Elf_Sym_Extra *) asym_ptr->udata)->elf_sym_num; |
d24928c0 | 2645 | else |
32090b8e | 2646 | { |
32090b8e KR |
2647 | abort (); |
2648 | } | |
244ffee7 | 2649 | |
32090b8e | 2650 | #if DEBUG & 4 |
244ffee7 | 2651 | { |
244ffee7 | 2652 | |
32090b8e | 2653 | fprintf (stderr, |
d24928c0 | 2654 | "elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx %s\n", |
1c6042ee | 2655 | (long) asym_ptr, asym_ptr->name, idx, flags, elf_symbol_flags (flags)); |
32090b8e KR |
2656 | fflush (stderr); |
2657 | } | |
2658 | #endif | |
2659 | ||
2660 | return idx; | |
2661 | } | |
2662 | ||
cb71adf1 PS |
2663 | static long |
2664 | elf_slurp_symbol_table (abfd, symptrs, dynamic) | |
1c6042ee ILT |
2665 | bfd *abfd; |
2666 | asymbol **symptrs; /* Buffer for generated bfd symbols */ | |
cb71adf1 | 2667 | boolean dynamic; |
32090b8e | 2668 | { |
cb71adf1 | 2669 | Elf_Internal_Shdr *hdr; |
7d8aaf36 | 2670 | long symcount; /* Number of external ELF symbols */ |
32090b8e KR |
2671 | elf_symbol_type *sym; /* Pointer to current bfd symbol */ |
2672 | elf_symbol_type *symbase; /* Buffer for generated bfd symbols */ | |
2673 | Elf_Internal_Sym i_sym; | |
80425e6c | 2674 | Elf_External_Sym *x_symp = NULL; |
32090b8e | 2675 | |
32090b8e KR |
2676 | /* Read each raw ELF symbol, converting from external ELF form to |
2677 | internal ELF form, and then using the information to create a | |
2678 | canonical bfd symbol table entry. | |
244ffee7 | 2679 | |
32090b8e KR |
2680 | Note that we allocate the initial bfd canonical symbol buffer |
2681 | based on a one-to-one mapping of the ELF symbols to canonical | |
2682 | symbols. We actually use all the ELF symbols, so there will be no | |
2683 | space left over at the end. When we have all the symbols, we | |
2684 | build the caller's pointer vector. */ | |
244ffee7 | 2685 | |
cb71adf1 PS |
2686 | if (dynamic) |
2687 | hdr = &elf_tdata (abfd)->dynsymtab_hdr; | |
2688 | else | |
2689 | hdr = &elf_tdata (abfd)->symtab_hdr; | |
32090b8e | 2690 | if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) == -1) |
cb71adf1 | 2691 | return -1; |
244ffee7 | 2692 | |
32090b8e | 2693 | symcount = hdr->sh_size / sizeof (Elf_External_Sym); |
244ffee7 | 2694 | |
7d8aaf36 ILT |
2695 | if (symcount == 0) |
2696 | sym = symbase = NULL; | |
2697 | else | |
244ffee7 | 2698 | { |
7d8aaf36 | 2699 | long i; |
244ffee7 | 2700 | |
7d8aaf36 | 2701 | if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) == -1) |
cb71adf1 | 2702 | return -1; |
7d8aaf36 ILT |
2703 | |
2704 | symbase = ((elf_symbol_type *) | |
2705 | bfd_zalloc (abfd, symcount * sizeof (elf_symbol_type))); | |
2706 | if (symbase == (elf_symbol_type *) NULL) | |
32090b8e | 2707 | { |
7d8aaf36 | 2708 | bfd_set_error (bfd_error_no_memory); |
cb71adf1 | 2709 | return -1; |
32090b8e | 2710 | } |
7d8aaf36 ILT |
2711 | sym = symbase; |
2712 | ||
2713 | /* Temporarily allocate room for the raw ELF symbols. */ | |
2714 | x_symp = ((Elf_External_Sym *) | |
80425e6c | 2715 | malloc (symcount * sizeof (Elf_External_Sym))); |
25057836 | 2716 | if (x_symp == NULL && symcount != 0) |
80425e6c JK |
2717 | { |
2718 | bfd_set_error (bfd_error_no_memory); | |
2719 | goto error_return; | |
2720 | } | |
7d8aaf36 ILT |
2721 | |
2722 | if (bfd_read ((PTR) x_symp, sizeof (Elf_External_Sym), symcount, abfd) | |
2723 | != symcount * sizeof (Elf_External_Sym)) | |
25057836 | 2724 | goto error_return; |
7d8aaf36 ILT |
2725 | /* Skip first symbol, which is a null dummy. */ |
2726 | for (i = 1; i < symcount; i++) | |
32090b8e | 2727 | { |
7d8aaf36 ILT |
2728 | elf_swap_symbol_in (abfd, x_symp + i, &i_sym); |
2729 | memcpy (&sym->internal_elf_sym, &i_sym, sizeof (Elf_Internal_Sym)); | |
2730 | #ifdef ELF_KEEP_EXTSYM | |
2731 | memcpy (&sym->native_elf_sym, x_symp + i, sizeof (Elf_External_Sym)); | |
2732 | #endif | |
2733 | sym->symbol.the_bfd = abfd; | |
244ffee7 | 2734 | |
7d8aaf36 ILT |
2735 | sym->symbol.name = elf_string_from_elf_section (abfd, hdr->sh_link, |
2736 | i_sym.st_name); | |
244ffee7 | 2737 | |
7d8aaf36 | 2738 | sym->symbol.value = i_sym.st_value; |
244ffee7 | 2739 | |
6ec3bb6a | 2740 | if (i_sym.st_shndx > 0 && i_sym.st_shndx < SHN_LORESERVE) |
7d8aaf36 ILT |
2741 | { |
2742 | sym->symbol.section = section_from_elf_index (abfd, | |
2743 | i_sym.st_shndx); | |
2e03ce18 | 2744 | if (sym->symbol.section == NULL) |
013dec1a ILT |
2745 | { |
2746 | /* This symbol is in a section for which we did not | |
2747 | create a BFD section. Just use bfd_abs_section, | |
2748 | although it is wrong. FIXME. */ | |
2749 | sym->symbol.section = &bfd_abs_section; | |
2750 | } | |
7d8aaf36 ILT |
2751 | } |
2752 | else if (i_sym.st_shndx == SHN_ABS) | |
2753 | { | |
2754 | sym->symbol.section = &bfd_abs_section; | |
2755 | } | |
2756 | else if (i_sym.st_shndx == SHN_COMMON) | |
2757 | { | |
2758 | sym->symbol.section = &bfd_com_section; | |
2759 | /* Elf puts the alignment into the `value' field, and | |
2760 | the size into the `size' field. BFD wants to see the | |
2761 | size in the value field, and doesn't care (at the | |
2762 | moment) about the alignment. */ | |
2763 | sym->symbol.value = i_sym.st_size; | |
2764 | } | |
2765 | else if (i_sym.st_shndx == SHN_UNDEF) | |
2766 | { | |
2767 | sym->symbol.section = &bfd_und_section; | |
2768 | } | |
2769 | else | |
2770 | sym->symbol.section = &bfd_abs_section; | |
300adb31 | 2771 | |
7d8aaf36 | 2772 | sym->symbol.value -= sym->symbol.section->vma; |
244ffee7 | 2773 | |
7d8aaf36 ILT |
2774 | switch (ELF_ST_BIND (i_sym.st_info)) |
2775 | { | |
2776 | case STB_LOCAL: | |
2777 | sym->symbol.flags |= BSF_LOCAL; | |
2778 | break; | |
2779 | case STB_GLOBAL: | |
2780 | sym->symbol.flags |= BSF_GLOBAL; | |
2781 | break; | |
2782 | case STB_WEAK: | |
2783 | sym->symbol.flags |= BSF_WEAK; | |
2784 | break; | |
2785 | } | |
2786 | ||
2787 | switch (ELF_ST_TYPE (i_sym.st_info)) | |
2788 | { | |
2789 | case STT_SECTION: | |
2790 | sym->symbol.flags |= BSF_SECTION_SYM | BSF_DEBUGGING; | |
2791 | break; | |
2792 | case STT_FILE: | |
2793 | sym->symbol.flags |= BSF_FILE | BSF_DEBUGGING; | |
2794 | break; | |
2795 | case STT_FUNC: | |
2796 | sym->symbol.flags |= BSF_FUNCTION; | |
2797 | break; | |
2798 | } | |
2799 | ||
cb71adf1 PS |
2800 | if (dynamic) |
2801 | sym->symbol.flags |= BSF_DYNAMIC; | |
2802 | ||
7d8aaf36 ILT |
2803 | /* Do some backend-specific processing on this symbol. */ |
2804 | { | |
2805 | struct elf_backend_data *ebd = get_elf_backend_data (abfd); | |
2806 | if (ebd->elf_backend_symbol_processing) | |
2807 | (*ebd->elf_backend_symbol_processing) (abfd, &sym->symbol); | |
2808 | } | |
2809 | ||
2810 | sym++; | |
2811 | } | |
244ffee7 JK |
2812 | } |
2813 | ||
e621c5cc ILT |
2814 | /* Do some backend-specific processing on this symbol table. */ |
2815 | { | |
2816 | struct elf_backend_data *ebd = get_elf_backend_data (abfd); | |
2817 | if (ebd->elf_backend_symbol_table_processing) | |
2818 | (*ebd->elf_backend_symbol_table_processing) (abfd, symbase, symcount); | |
2819 | } | |
244ffee7 | 2820 | |
e621c5cc | 2821 | /* We rely on the zalloc to clear out the final symbol entry. */ |
244ffee7 | 2822 | |
cb71adf1 | 2823 | symcount = sym - symbase; |
32090b8e KR |
2824 | |
2825 | /* Fill in the user's symbol pointer vector if needed. */ | |
2826 | if (symptrs) | |
244ffee7 | 2827 | { |
cb71adf1 PS |
2828 | long l = symcount; |
2829 | ||
32090b8e | 2830 | sym = symbase; |
cb71adf1 | 2831 | while (l-- > 0) |
244ffee7 | 2832 | { |
32090b8e KR |
2833 | *symptrs++ = &sym->symbol; |
2834 | sym++; | |
244ffee7 | 2835 | } |
32090b8e | 2836 | *symptrs = 0; /* Final null pointer */ |
244ffee7 JK |
2837 | } |
2838 | ||
80425e6c JK |
2839 | if (x_symp != NULL) |
2840 | free (x_symp); | |
cb71adf1 | 2841 | return symcount; |
1c6042ee | 2842 | error_return: |
80425e6c JK |
2843 | if (x_symp != NULL) |
2844 | free (x_symp); | |
cb71adf1 | 2845 | return -1; |
244ffee7 JK |
2846 | } |
2847 | ||
32090b8e | 2848 | /* Return the number of bytes required to hold the symtab vector. |
244ffee7 | 2849 | |
32090b8e KR |
2850 | Note that we base it on the count plus 1, since we will null terminate |
2851 | the vector allocated based on this size. However, the ELF symbol table | |
2852 | always has a dummy entry as symbol #0, so it ends up even. */ | |
244ffee7 | 2853 | |
326e32d7 | 2854 | long |
1c6042ee ILT |
2855 | elf_get_symtab_upper_bound (abfd) |
2856 | bfd *abfd; | |
244ffee7 | 2857 | { |
326e32d7 ILT |
2858 | long symcount; |
2859 | long symtab_size; | |
1c6042ee | 2860 | Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->symtab_hdr; |
326e32d7 | 2861 | |
32090b8e | 2862 | symcount = hdr->sh_size / sizeof (Elf_External_Sym); |
d6439785 | 2863 | symtab_size = (symcount - 1 + 1) * (sizeof (asymbol *)); |
244ffee7 | 2864 | |
32090b8e KR |
2865 | return symtab_size; |
2866 | } | |
244ffee7 | 2867 | |
cb71adf1 PS |
2868 | long |
2869 | elf_get_dynamic_symtab_upper_bound (abfd) | |
2870 | bfd *abfd; | |
2871 | { | |
2872 | long symcount; | |
2873 | long symtab_size; | |
2874 | Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->dynsymtab_hdr; | |
2875 | ||
2876 | symcount = hdr->sh_size / sizeof (Elf_External_Sym); | |
2877 | symtab_size = (symcount - 1 + 1) * (sizeof (asymbol *)); | |
2878 | ||
2879 | return symtab_size; | |
2880 | } | |
2881 | ||
32090b8e KR |
2882 | /* |
2883 | This function return the number of bytes required to store the | |
2884 | relocation information associated with section <<sect>> | |
2885 | attached to bfd <<abfd>> | |
244ffee7 | 2886 | |
32090b8e | 2887 | */ |
326e32d7 | 2888 | long |
32090b8e KR |
2889 | elf_get_reloc_upper_bound (abfd, asect) |
2890 | bfd *abfd; | |
2891 | sec_ptr asect; | |
2892 | { | |
2893 | if (asect->flags & SEC_RELOC) | |
2894 | { | |
2895 | /* either rel or rela */ | |
1c6042ee | 2896 | return elf_section_data (asect)->rel_hdr.sh_size; |
32090b8e KR |
2897 | } |
2898 | else | |
2899 | return 0; | |
244ffee7 JK |
2900 | } |
2901 | ||
32090b8e | 2902 | static boolean |
1c6042ee ILT |
2903 | elf_slurp_reloca_table (abfd, asect, symbols) |
2904 | bfd *abfd; | |
2905 | sec_ptr asect; | |
2906 | asymbol **symbols; | |
244ffee7 | 2907 | { |
32090b8e KR |
2908 | Elf_External_Rela *native_relocs; |
2909 | arelent *reloc_cache; | |
2910 | arelent *cache_ptr; | |
244ffee7 | 2911 | |
32090b8e | 2912 | unsigned int idx; |
244ffee7 | 2913 | |
32090b8e KR |
2914 | if (asect->relocation) |
2915 | return true; | |
2916 | if (asect->reloc_count == 0) | |
2917 | return true; | |
2918 | if (asect->flags & SEC_CONSTRUCTOR) | |
2919 | return true; | |
244ffee7 | 2920 | |
4002f18a ILT |
2921 | if (bfd_seek (abfd, asect->rel_filepos, SEEK_SET) != 0) |
2922 | return false; | |
32090b8e KR |
2923 | native_relocs = (Elf_External_Rela *) |
2924 | bfd_alloc (abfd, asect->reloc_count * sizeof (Elf_External_Rela)); | |
9783e04a | 2925 | if (!native_relocs) |
9783e04a | 2926 | { |
d1ad85a6 | 2927 | bfd_set_error (bfd_error_no_memory); |
9783e04a DM |
2928 | return false; |
2929 | } | |
4002f18a ILT |
2930 | if (bfd_read ((PTR) native_relocs, |
2931 | sizeof (Elf_External_Rela), asect->reloc_count, abfd) | |
2932 | != sizeof (Elf_External_Rela) * asect->reloc_count) | |
2933 | return false; | |
244ffee7 | 2934 | |
32090b8e KR |
2935 | reloc_cache = (arelent *) |
2936 | bfd_alloc (abfd, (size_t) (asect->reloc_count * sizeof (arelent))); | |
2937 | ||
2938 | if (!reloc_cache) | |
6a3eb9b6 | 2939 | { |
d1ad85a6 | 2940 | bfd_set_error (bfd_error_no_memory); |
32090b8e | 2941 | return false; |
6a3eb9b6 | 2942 | } |
244ffee7 | 2943 | |
32090b8e KR |
2944 | for (idx = 0; idx < asect->reloc_count; idx++) |
2945 | { | |
32090b8e KR |
2946 | Elf_Internal_Rela dst; |
2947 | Elf_External_Rela *src; | |
244ffee7 | 2948 | |
32090b8e KR |
2949 | cache_ptr = reloc_cache + idx; |
2950 | src = native_relocs + idx; | |
2951 | elf_swap_reloca_in (abfd, src, &dst); | |
244ffee7 | 2952 | |
d24928c0 | 2953 | #ifdef RELOC_PROCESSING |
32090b8e KR |
2954 | RELOC_PROCESSING (cache_ptr, &dst, symbols, abfd, asect); |
2955 | #else | |
32090b8e KR |
2956 | if (asect->flags & SEC_RELOC) |
2957 | { | |
2958 | /* relocatable, so the offset is off of the section */ | |
2959 | cache_ptr->address = dst.r_offset + asect->vma; | |
2960 | } | |
2961 | else | |
2962 | { | |
2963 | /* non-relocatable, so the offset a virtual address */ | |
2964 | cache_ptr->address = dst.r_offset; | |
2965 | } | |
7b8106b4 ILT |
2966 | |
2967 | /* ELF_R_SYM(dst.r_info) is the symbol table offset. An offset | |
2968 | of zero points to the dummy symbol, which was not read into | |
2969 | the symbol table SYMBOLS. */ | |
2970 | if (ELF_R_SYM (dst.r_info) == 0) | |
2971 | cache_ptr->sym_ptr_ptr = bfd_abs_section.symbol_ptr_ptr; | |
2972 | else | |
2973 | { | |
2974 | asymbol *s; | |
2975 | ||
2976 | cache_ptr->sym_ptr_ptr = symbols + ELF_R_SYM (dst.r_info) - 1; | |
2977 | ||
2978 | /* Translate any ELF section symbol into a BFD section | |
2979 | symbol. */ | |
2980 | s = *(cache_ptr->sym_ptr_ptr); | |
2981 | if (s->flags & BSF_SECTION_SYM) | |
2982 | { | |
2983 | cache_ptr->sym_ptr_ptr = s->section->symbol_ptr_ptr; | |
2984 | s = *cache_ptr->sym_ptr_ptr; | |
2985 | if (s->name == 0 || s->name[0] == 0) | |
2986 | abort (); | |
2987 | } | |
2988 | } | |
32090b8e | 2989 | cache_ptr->addend = dst.r_addend; |
244ffee7 | 2990 | |
32090b8e KR |
2991 | /* Fill in the cache_ptr->howto field from dst.r_type */ |
2992 | { | |
2993 | struct elf_backend_data *ebd = get_elf_backend_data (abfd); | |
2994 | (*ebd->elf_info_to_howto) (abfd, cache_ptr, &dst); | |
2995 | } | |
2996 | #endif | |
2997 | } | |
244ffee7 | 2998 | |
32090b8e KR |
2999 | asect->relocation = reloc_cache; |
3000 | return true; | |
3001 | } | |
238ac6ec | 3002 | |
32090b8e KR |
3003 | #ifdef DEBUG |
3004 | static void | |
3005 | elf_debug_section (str, num, hdr) | |
3006 | char *str; | |
3007 | int num; | |
3008 | Elf_Internal_Shdr *hdr; | |
3009 | { | |
3010 | fprintf (stderr, "\nSection#%d '%s' 0x%.8lx\n", num, str, (long) hdr); | |
3011 | fprintf (stderr, | |
3012 | "sh_name = %ld\tsh_type = %ld\tsh_flags = %ld\n", | |
3013 | (long) hdr->sh_name, | |
3014 | (long) hdr->sh_type, | |
3015 | (long) hdr->sh_flags); | |
3016 | fprintf (stderr, | |
3017 | "sh_addr = %ld\tsh_offset = %ld\tsh_size = %ld\n", | |
3018 | (long) hdr->sh_addr, | |
3019 | (long) hdr->sh_offset, | |
3020 | (long) hdr->sh_size); | |
3021 | fprintf (stderr, | |
3022 | "sh_link = %ld\tsh_info = %ld\tsh_addralign = %ld\n", | |
3023 | (long) hdr->sh_link, | |
3024 | (long) hdr->sh_info, | |
3025 | (long) hdr->sh_addralign); | |
3026 | fprintf (stderr, "sh_entsize = %ld\n", | |
3027 | (long) hdr->sh_entsize); | |
3028 | fprintf (stderr, "rawdata = 0x%.8lx\n", (long) hdr->rawdata); | |
3029 | fprintf (stderr, "contents = 0x%.8lx\n", (long) hdr->contents); | |
3030 | fprintf (stderr, "size = %ld\n", (long) hdr->size); | |
3031 | fflush (stderr); | |
3032 | } | |
244ffee7 | 3033 | |
32090b8e KR |
3034 | static void |
3035 | elf_debug_file (ehdrp) | |
3036 | Elf_Internal_Ehdr *ehdrp; | |
3037 | { | |
3038 | fprintf (stderr, "e_entry = 0x%.8lx\n", (long) ehdrp->e_entry); | |
3039 | fprintf (stderr, "e_phoff = %ld\n", (long) ehdrp->e_phoff); | |
3040 | fprintf (stderr, "e_phnum = %ld\n", (long) ehdrp->e_phnum); | |
3041 | fprintf (stderr, "e_phentsize = %ld\n", (long) ehdrp->e_phentsize); | |
3042 | fprintf (stderr, "e_shoff = %ld\n", (long) ehdrp->e_shoff); | |
3043 | fprintf (stderr, "e_shnum = %ld\n", (long) ehdrp->e_shnum); | |
3044 | fprintf (stderr, "e_shentsize = %ld\n", (long) ehdrp->e_shentsize); | |
244ffee7 | 3045 | } |
32090b8e | 3046 | #endif |
244ffee7 JK |
3047 | |
3048 | static boolean | |
1c6042ee ILT |
3049 | elf_slurp_reloc_table (abfd, asect, symbols) |
3050 | bfd *abfd; | |
3051 | sec_ptr asect; | |
3052 | asymbol **symbols; | |
244ffee7 | 3053 | { |
32090b8e KR |
3054 | Elf_External_Rel *native_relocs; |
3055 | arelent *reloc_cache; | |
3056 | arelent *cache_ptr; | |
3057 | Elf_Internal_Shdr *data_hdr; | |
25677b5b PS |
3058 | bfd_vma data_off; |
3059 | unsigned long data_max; | |
32090b8e | 3060 | char buf[4]; /* FIXME -- might be elf64 */ |
244ffee7 | 3061 | |
32090b8e | 3062 | unsigned int idx; |
244ffee7 | 3063 | |
32090b8e KR |
3064 | if (asect->relocation) |
3065 | return true; | |
3066 | if (asect->reloc_count == 0) | |
3067 | return true; | |
3068 | if (asect->flags & SEC_CONSTRUCTOR) | |
3069 | return true; | |
244ffee7 | 3070 | |
4002f18a ILT |
3071 | if (bfd_seek (abfd, asect->rel_filepos, SEEK_SET) != 0) |
3072 | return false; | |
32090b8e KR |
3073 | native_relocs = (Elf_External_Rel *) |
3074 | bfd_alloc (abfd, asect->reloc_count * sizeof (Elf_External_Rel)); | |
9783e04a DM |
3075 | if (!native_relocs) |
3076 | { | |
d1ad85a6 | 3077 | bfd_set_error (bfd_error_no_memory); |
9783e04a DM |
3078 | return false; |
3079 | } | |
4002f18a ILT |
3080 | if (bfd_read ((PTR) native_relocs, |
3081 | sizeof (Elf_External_Rel), asect->reloc_count, abfd) | |
3082 | != sizeof (Elf_External_Rel) * asect->reloc_count) | |
3083 | return false; | |
244ffee7 | 3084 | |
32090b8e KR |
3085 | reloc_cache = (arelent *) |
3086 | bfd_alloc (abfd, (size_t) (asect->reloc_count * sizeof (arelent))); | |
3087 | ||
3088 | if (!reloc_cache) | |
244ffee7 | 3089 | { |
d1ad85a6 | 3090 | bfd_set_error (bfd_error_no_memory); |
244ffee7 JK |
3091 | return false; |
3092 | } | |
3093 | ||
32090b8e KR |
3094 | /* Get the offset of the start of the segment we are relocating to read in |
3095 | the implicit addend. */ | |
1c6042ee | 3096 | data_hdr = &elf_section_data (asect)->this_hdr; |
32090b8e KR |
3097 | data_off = data_hdr->sh_offset; |
3098 | data_max = data_hdr->sh_size - sizeof (buf) + 1; | |
244ffee7 | 3099 | |
32090b8e KR |
3100 | #if DEBUG & 2 |
3101 | elf_debug_section ("data section", -1, data_hdr); | |
3102 | #endif | |
244ffee7 | 3103 | |
32090b8e | 3104 | for (idx = 0; idx < asect->reloc_count; idx++) |
244ffee7 | 3105 | { |
32090b8e KR |
3106 | #ifdef RELOC_PROCESSING |
3107 | Elf_Internal_Rel dst; | |
3108 | Elf_External_Rel *src; | |
244ffee7 | 3109 | |
32090b8e KR |
3110 | cache_ptr = reloc_cache + idx; |
3111 | src = native_relocs + idx; | |
3112 | elf_swap_reloc_in (abfd, src, &dst); | |
244ffee7 | 3113 | |
32090b8e KR |
3114 | RELOC_PROCESSING (cache_ptr, &dst, symbols, abfd, asect); |
3115 | #else | |
3116 | Elf_Internal_Rel dst; | |
3117 | Elf_External_Rel *src; | |
6a3eb9b6 | 3118 | |
32090b8e KR |
3119 | cache_ptr = reloc_cache + idx; |
3120 | src = native_relocs + idx; | |
3121 | ||
3122 | elf_swap_reloc_in (abfd, src, &dst); | |
3123 | ||
3124 | if (asect->flags & SEC_RELOC) | |
244ffee7 | 3125 | { |
32090b8e KR |
3126 | /* relocatable, so the offset is off of the section */ |
3127 | cache_ptr->address = dst.r_offset + asect->vma; | |
244ffee7 | 3128 | } |
32090b8e | 3129 | else |
244ffee7 | 3130 | { |
32090b8e KR |
3131 | /* non-relocatable, so the offset a virtual address */ |
3132 | cache_ptr->address = dst.r_offset; | |
244ffee7 | 3133 | } |
7b8106b4 ILT |
3134 | |
3135 | /* ELF_R_SYM(dst.r_info) is the symbol table offset. An offset | |
3136 | of zero points to the dummy symbol, which was not read into | |
3137 | the symbol table SYMBOLS. */ | |
3138 | if (ELF_R_SYM (dst.r_info) == 0) | |
3139 | cache_ptr->sym_ptr_ptr = bfd_abs_section.symbol_ptr_ptr; | |
3140 | else | |
3141 | { | |
3142 | asymbol *s; | |
3143 | ||
3144 | cache_ptr->sym_ptr_ptr = symbols + ELF_R_SYM (dst.r_info) - 1; | |
3145 | ||
3146 | /* Translate any ELF section symbol into a BFD section | |
3147 | symbol. */ | |
3148 | s = *(cache_ptr->sym_ptr_ptr); | |
3149 | if (s->flags & BSF_SECTION_SYM) | |
3150 | { | |
3151 | cache_ptr->sym_ptr_ptr = s->section->symbol_ptr_ptr; | |
3152 | s = *cache_ptr->sym_ptr_ptr; | |
3153 | if (s->name == 0 || s->name[0] == 0) | |
3154 | abort (); | |
3155 | } | |
3156 | } | |
32090b8e | 3157 | BFD_ASSERT (dst.r_offset <= data_max); |
d24928c0 | 3158 | cache_ptr->addend = 0; |
244ffee7 | 3159 | |
32090b8e KR |
3160 | /* Fill in the cache_ptr->howto field from dst.r_type */ |
3161 | { | |
3162 | struct elf_backend_data *ebd = get_elf_backend_data (abfd); | |
3163 | (*ebd->elf_info_to_howto_rel) (abfd, cache_ptr, &dst); | |
3164 | } | |
3165 | #endif | |
3166 | } | |
244ffee7 | 3167 | |
32090b8e KR |
3168 | asect->relocation = reloc_cache; |
3169 | return true; | |
3170 | } | |
244ffee7 | 3171 | |
326e32d7 | 3172 | long |
32090b8e KR |
3173 | elf_canonicalize_reloc (abfd, section, relptr, symbols) |
3174 | bfd *abfd; | |
3175 | sec_ptr section; | |
3176 | arelent **relptr; | |
3177 | asymbol **symbols; | |
3178 | { | |
3179 | arelent *tblptr = section->relocation; | |
3180 | unsigned int count = 0; | |
3181 | int use_rela_p = get_elf_backend_data (abfd)->use_rela_p; | |
3182 | ||
3183 | /* snarfed from coffcode.h */ | |
3184 | if (use_rela_p) | |
326e32d7 ILT |
3185 | { |
3186 | if (! elf_slurp_reloca_table (abfd, section, symbols)) | |
3187 | return -1; | |
3188 | } | |
32090b8e | 3189 | else |
326e32d7 ILT |
3190 | { |
3191 | if (! elf_slurp_reloc_table (abfd, section, symbols)) | |
3192 | return -1; | |
3193 | } | |
32090b8e KR |
3194 | |
3195 | tblptr = section->relocation; | |
32090b8e KR |
3196 | |
3197 | for (; count++ < section->reloc_count;) | |
3198 | *relptr++ = tblptr++; | |
3199 | ||
3200 | *relptr = 0; | |
3201 | return section->reloc_count; | |
3202 | } | |
3203 | ||
326e32d7 | 3204 | long |
1c6042ee ILT |
3205 | elf_get_symtab (abfd, alocation) |
3206 | bfd *abfd; | |
3207 | asymbol **alocation; | |
32090b8e | 3208 | { |
cb71adf1 PS |
3209 | long symcount = elf_slurp_symbol_table (abfd, alocation, false); |
3210 | ||
3211 | if (symcount >= 0) | |
3212 | bfd_get_symcount (abfd) = symcount; | |
3213 | return symcount; | |
3214 | } | |
326e32d7 | 3215 | |
cb71adf1 PS |
3216 | long |
3217 | elf_canonicalize_dynamic_symtab (abfd, alocation) | |
3218 | bfd *abfd; | |
3219 | asymbol **alocation; | |
3220 | { | |
3221 | return elf_slurp_symbol_table (abfd, alocation, true); | |
32090b8e KR |
3222 | } |
3223 | ||
3224 | asymbol * | |
1c6042ee ILT |
3225 | elf_make_empty_symbol (abfd) |
3226 | bfd *abfd; | |
32090b8e KR |
3227 | { |
3228 | elf_symbol_type *newsym; | |
3229 | ||
3230 | newsym = (elf_symbol_type *) bfd_zalloc (abfd, sizeof (elf_symbol_type)); | |
3231 | if (!newsym) | |
3232 | { | |
d1ad85a6 | 3233 | bfd_set_error (bfd_error_no_memory); |
32090b8e KR |
3234 | return NULL; |
3235 | } | |
3236 | else | |
3237 | { | |
3238 | newsym->symbol.the_bfd = abfd; | |
3239 | return &newsym->symbol; | |
244ffee7 | 3240 | } |
32090b8e | 3241 | } |
244ffee7 | 3242 | |
32090b8e | 3243 | void |
1c6042ee ILT |
3244 | elf_get_symbol_info (ignore_abfd, symbol, ret) |
3245 | bfd *ignore_abfd; | |
3246 | asymbol *symbol; | |
3247 | symbol_info *ret; | |
32090b8e KR |
3248 | { |
3249 | bfd_symbol_info (symbol, ret); | |
3250 | } | |
244ffee7 | 3251 | |
32090b8e | 3252 | void |
1c6042ee ILT |
3253 | elf_print_symbol (ignore_abfd, filep, symbol, how) |
3254 | bfd *ignore_abfd; | |
3255 | PTR filep; | |
3256 | asymbol *symbol; | |
3257 | bfd_print_symbol_type how; | |
32090b8e KR |
3258 | { |
3259 | FILE *file = (FILE *) filep; | |
3260 | switch (how) | |
3261 | { | |
3262 | case bfd_print_symbol_name: | |
3263 | fprintf (file, "%s", symbol->name); | |
3264 | break; | |
3265 | case bfd_print_symbol_more: | |
3266 | fprintf (file, "elf "); | |
3267 | fprintf_vma (file, symbol->value); | |
3268 | fprintf (file, " %lx", (long) symbol->flags); | |
3269 | break; | |
3270 | case bfd_print_symbol_all: | |
3271 | { | |
3272 | CONST char *section_name; | |
3273 | section_name = symbol->section ? symbol->section->name : "(*none*)"; | |
3274 | bfd_print_symbol_vandf ((PTR) file, symbol); | |
3275 | fprintf (file, " %s\t%s", | |
3276 | section_name, | |
3277 | symbol->name); | |
3278 | } | |
3279 | break; | |
3280 | } | |
244ffee7 | 3281 | |
32090b8e | 3282 | } |
244ffee7 | 3283 | |
32090b8e | 3284 | alent * |
1c6042ee ILT |
3285 | elf_get_lineno (ignore_abfd, symbol) |
3286 | bfd *ignore_abfd; | |
3287 | asymbol *symbol; | |
32090b8e KR |
3288 | { |
3289 | fprintf (stderr, "elf_get_lineno unimplemented\n"); | |
3290 | fflush (stderr); | |
3291 | BFD_FAIL (); | |
3292 | return NULL; | |
3293 | } | |
3294 | ||
3295 | boolean | |
1c6042ee ILT |
3296 | elf_set_arch_mach (abfd, arch, machine) |
3297 | bfd *abfd; | |
3298 | enum bfd_architecture arch; | |
3299 | unsigned long machine; | |
32090b8e | 3300 | { |
80a903c9 ILT |
3301 | /* If this isn't the right architecture for this backend, and this |
3302 | isn't the generic backend, fail. */ | |
3303 | if (arch != get_elf_backend_data (abfd)->arch | |
3304 | && arch != bfd_arch_unknown | |
3305 | && get_elf_backend_data (abfd)->arch != bfd_arch_unknown) | |
3306 | return false; | |
3307 | ||
3308 | return bfd_default_set_arch_mach (abfd, arch, machine); | |
32090b8e | 3309 | } |
244ffee7 | 3310 | |
32090b8e | 3311 | boolean |
1c6042ee ILT |
3312 | elf_find_nearest_line (abfd, |
3313 | section, | |
3314 | symbols, | |
3315 | offset, | |
3316 | filename_ptr, | |
3317 | functionname_ptr, | |
3318 | line_ptr) | |
3319 | bfd *abfd; | |
3320 | asection *section; | |
3321 | asymbol **symbols; | |
3322 | bfd_vma offset; | |
3323 | CONST char **filename_ptr; | |
3324 | CONST char **functionname_ptr; | |
3325 | unsigned int *line_ptr; | |
32090b8e KR |
3326 | { |
3327 | return false; | |
244ffee7 JK |
3328 | } |
3329 | ||
32090b8e | 3330 | int |
1c6042ee ILT |
3331 | elf_sizeof_headers (abfd, reloc) |
3332 | bfd *abfd; | |
3333 | boolean reloc; | |
32090b8e | 3334 | { |
013dec1a ILT |
3335 | int ret; |
3336 | ||
3337 | ret = sizeof (Elf_External_Ehdr); | |
3338 | if (! reloc) | |
3339 | ret += get_program_header_size (abfd); | |
3340 | return ret; | |
32090b8e | 3341 | } |
244ffee7 | 3342 | |
32090b8e | 3343 | boolean |
1c6042ee ILT |
3344 | elf_set_section_contents (abfd, section, location, offset, count) |
3345 | bfd *abfd; | |
3346 | sec_ptr section; | |
3347 | PTR location; | |
3348 | file_ptr offset; | |
3349 | bfd_size_type count; | |
244ffee7 | 3350 | { |
244ffee7 JK |
3351 | Elf_Internal_Shdr *hdr; |
3352 | ||
6ec3bb6a ILT |
3353 | if (! abfd->output_has_begun |
3354 | && ! elf_compute_section_file_positions (abfd, | |
3355 | (struct bfd_link_info *) NULL)) | |
3356 | return false; | |
244ffee7 | 3357 | |
1c6042ee | 3358 | hdr = &elf_section_data (section)->this_hdr; |
244ffee7 | 3359 | |
32090b8e KR |
3360 | if (bfd_seek (abfd, hdr->sh_offset + offset, SEEK_SET) == -1) |
3361 | return false; | |
3362 | if (bfd_write (location, 1, count, abfd) != count) | |
3363 | return false; | |
3364 | ||
3365 | return true; | |
3366 | } | |
3367 | ||
3368 | void | |
1c6042ee ILT |
3369 | elf_no_info_to_howto (abfd, cache_ptr, dst) |
3370 | bfd *abfd; | |
3371 | arelent *cache_ptr; | |
3372 | Elf_Internal_Rela *dst; | |
244ffee7 | 3373 | { |
32090b8e KR |
3374 | fprintf (stderr, "elf RELA relocation support for target machine unimplemented\n"); |
3375 | fflush (stderr); | |
3376 | BFD_FAIL (); | |
244ffee7 JK |
3377 | } |
3378 | ||
32090b8e | 3379 | void |
1c6042ee ILT |
3380 | elf_no_info_to_howto_rel (abfd, cache_ptr, dst) |
3381 | bfd *abfd; | |
3382 | arelent *cache_ptr; | |
3383 | Elf_Internal_Rel *dst; | |
244ffee7 | 3384 | { |
32090b8e KR |
3385 | fprintf (stderr, "elf REL relocation support for target machine unimplemented\n"); |
3386 | fflush (stderr); | |
3387 | BFD_FAIL (); | |
3388 | } | |
32090b8e | 3389 | \f |
1c6042ee | 3390 | |
32090b8e | 3391 | /* Core file support */ |
244ffee7 | 3392 | |
32090b8e KR |
3393 | #ifdef HAVE_PROCFS /* Some core file support requires host /proc files */ |
3394 | #include <sys/procfs.h> | |
3395 | #else | |
2e03ce18 ILT |
3396 | #define bfd_prstatus(abfd, descdata, descsz, filepos) true |
3397 | #define bfd_fpregset(abfd, descdata, descsz, filepos) true | |
3398 | #define bfd_prpsinfo(abfd, descdata, descsz, filepos) true | |
32090b8e | 3399 | #endif |
244ffee7 | 3400 | |
32090b8e | 3401 | #ifdef HAVE_PROCFS |
244ffee7 | 3402 | |
2e03ce18 | 3403 | static boolean |
1c6042ee ILT |
3404 | bfd_prstatus (abfd, descdata, descsz, filepos) |
3405 | bfd *abfd; | |
3406 | char *descdata; | |
3407 | int descsz; | |
3408 | long filepos; | |
32090b8e KR |
3409 | { |
3410 | asection *newsect; | |
3411 | prstatus_t *status = (prstatus_t *) 0; | |
244ffee7 | 3412 | |
32090b8e | 3413 | if (descsz == sizeof (prstatus_t)) |
244ffee7 | 3414 | { |
32090b8e | 3415 | newsect = bfd_make_section (abfd, ".reg"); |
2e03ce18 ILT |
3416 | if (newsect == NULL) |
3417 | return false; | |
32090b8e KR |
3418 | newsect->_raw_size = sizeof (status->pr_reg); |
3419 | newsect->filepos = filepos + (long) &status->pr_reg; | |
3420 | newsect->flags = SEC_ALLOC | SEC_HAS_CONTENTS; | |
3421 | newsect->alignment_power = 2; | |
3422 | if ((core_prstatus (abfd) = bfd_alloc (abfd, descsz)) != NULL) | |
3423 | { | |
3424 | memcpy (core_prstatus (abfd), descdata, descsz); | |
3425 | } | |
244ffee7 | 3426 | } |
2e03ce18 | 3427 | return true; |
32090b8e | 3428 | } |
244ffee7 | 3429 | |
32090b8e | 3430 | /* Stash a copy of the prpsinfo structure away for future use. */ |
244ffee7 | 3431 | |
2e03ce18 | 3432 | static boolean |
1c6042ee ILT |
3433 | bfd_prpsinfo (abfd, descdata, descsz, filepos) |
3434 | bfd *abfd; | |
3435 | char *descdata; | |
3436 | int descsz; | |
3437 | long filepos; | |
32090b8e | 3438 | { |
32090b8e KR |
3439 | if (descsz == sizeof (prpsinfo_t)) |
3440 | { | |
2e03ce18 | 3441 | if ((core_prpsinfo (abfd) = bfd_alloc (abfd, descsz)) == NULL) |
244ffee7 | 3442 | { |
2e03ce18 ILT |
3443 | bfd_set_error (bfd_error_no_memory); |
3444 | return false; | |
244ffee7 | 3445 | } |
2e03ce18 | 3446 | memcpy (core_prpsinfo (abfd), descdata, descsz); |
244ffee7 | 3447 | } |
2e03ce18 | 3448 | return true; |
244ffee7 JK |
3449 | } |
3450 | ||
2e03ce18 | 3451 | static boolean |
1c6042ee ILT |
3452 | bfd_fpregset (abfd, descdata, descsz, filepos) |
3453 | bfd *abfd; | |
3454 | char *descdata; | |
3455 | int descsz; | |
3456 | long filepos; | |
244ffee7 | 3457 | { |
32090b8e | 3458 | asection *newsect; |
244ffee7 | 3459 | |
32090b8e | 3460 | newsect = bfd_make_section (abfd, ".reg2"); |
2e03ce18 ILT |
3461 | if (newsect == NULL) |
3462 | return false; | |
32090b8e KR |
3463 | newsect->_raw_size = descsz; |
3464 | newsect->filepos = filepos; | |
3465 | newsect->flags = SEC_ALLOC | SEC_HAS_CONTENTS; | |
3466 | newsect->alignment_power = 2; | |
2e03ce18 | 3467 | return true; |
6a3eb9b6 | 3468 | } |
244ffee7 | 3469 | |
32090b8e KR |
3470 | #endif /* HAVE_PROCFS */ |
3471 | ||
3472 | /* Return a pointer to the args (including the command name) that were | |
3473 | seen by the program that generated the core dump. Note that for | |
3474 | some reason, a spurious space is tacked onto the end of the args | |
3475 | in some (at least one anyway) implementations, so strip it off if | |
3476 | it exists. */ | |
3477 | ||
3478 | char * | |
1c6042ee ILT |
3479 | elf_core_file_failing_command (abfd) |
3480 | bfd *abfd; | |
244ffee7 | 3481 | { |
32090b8e KR |
3482 | #ifdef HAVE_PROCFS |
3483 | if (core_prpsinfo (abfd)) | |
3484 | { | |
3485 | prpsinfo_t *p = core_prpsinfo (abfd); | |
3486 | char *scan = p->pr_psargs; | |
3487 | while (*scan++) | |
3488 | {; | |
3489 | } | |
3490 | scan -= 2; | |
3491 | if ((scan > p->pr_psargs) && (*scan == ' ')) | |
3492 | { | |
3493 | *scan = '\000'; | |
3494 | } | |
3495 | return p->pr_psargs; | |
3496 | } | |
3497 | #endif | |
3498 | return NULL; | |
3499 | } | |
244ffee7 | 3500 | |
32090b8e KR |
3501 | /* Return the number of the signal that caused the core dump. Presumably, |
3502 | since we have a core file, we got a signal of some kind, so don't bother | |
3503 | checking the other process status fields, just return the signal number. | |
3504 | */ | |
244ffee7 | 3505 | |
32090b8e | 3506 | int |
1c6042ee ILT |
3507 | elf_core_file_failing_signal (abfd) |
3508 | bfd *abfd; | |
32090b8e KR |
3509 | { |
3510 | #ifdef HAVE_PROCFS | |
3511 | if (core_prstatus (abfd)) | |
3512 | { | |
3513 | return ((prstatus_t *) (core_prstatus (abfd)))->pr_cursig; | |
3514 | } | |
3515 | #endif | |
3516 | return -1; | |
3517 | } | |
244ffee7 | 3518 | |
32090b8e KR |
3519 | /* Check to see if the core file could reasonably be expected to have |
3520 | come for the current executable file. Note that by default we return | |
3521 | true unless we find something that indicates that there might be a | |
3522 | problem. | |
3523 | */ | |
244ffee7 | 3524 | |
32090b8e | 3525 | boolean |
1c6042ee ILT |
3526 | elf_core_file_matches_executable_p (core_bfd, exec_bfd) |
3527 | bfd *core_bfd; | |
3528 | bfd *exec_bfd; | |
32090b8e KR |
3529 | { |
3530 | #ifdef HAVE_PROCFS | |
3531 | char *corename; | |
3532 | char *execname; | |
3533 | #endif | |
244ffee7 | 3534 | |
32090b8e KR |
3535 | /* First, xvecs must match since both are ELF files for the same target. */ |
3536 | ||
3537 | if (core_bfd->xvec != exec_bfd->xvec) | |
244ffee7 | 3538 | { |
d1ad85a6 | 3539 | bfd_set_error (bfd_error_system_call); |
244ffee7 JK |
3540 | return false; |
3541 | } | |
3542 | ||
32090b8e | 3543 | #ifdef HAVE_PROCFS |
244ffee7 | 3544 | |
32090b8e KR |
3545 | /* If no prpsinfo, just return true. Otherwise, grab the last component |
3546 | of the exec'd pathname from the prpsinfo. */ | |
244ffee7 | 3547 | |
32090b8e | 3548 | if (core_prpsinfo (core_bfd)) |
244ffee7 | 3549 | { |
32090b8e KR |
3550 | corename = (((struct prpsinfo *) core_prpsinfo (core_bfd))->pr_fname); |
3551 | } | |
3552 | else | |
3553 | { | |
3554 | return true; | |
3555 | } | |
244ffee7 | 3556 | |
32090b8e | 3557 | /* Find the last component of the executable pathname. */ |
244ffee7 | 3558 | |
32090b8e KR |
3559 | if ((execname = strrchr (exec_bfd->filename, '/')) != NULL) |
3560 | { | |
3561 | execname++; | |
3562 | } | |
3563 | else | |
3564 | { | |
3565 | execname = (char *) exec_bfd->filename; | |
3566 | } | |
244ffee7 | 3567 | |
32090b8e | 3568 | /* See if they match */ |
244ffee7 | 3569 | |
32090b8e | 3570 | return strcmp (execname, corename) ? false : true; |
244ffee7 | 3571 | |
32090b8e | 3572 | #else |
244ffee7 | 3573 | |
244ffee7 | 3574 | return true; |
244ffee7 | 3575 | |
32090b8e KR |
3576 | #endif /* HAVE_PROCFS */ |
3577 | } | |
244ffee7 | 3578 | |
32090b8e KR |
3579 | /* ELF core files contain a segment of type PT_NOTE, that holds much of |
3580 | the information that would normally be available from the /proc interface | |
3581 | for the process, at the time the process dumped core. Currently this | |
3582 | includes copies of the prstatus, prpsinfo, and fpregset structures. | |
244ffee7 | 3583 | |
32090b8e KR |
3584 | Since these structures are potentially machine dependent in size and |
3585 | ordering, bfd provides two levels of support for them. The first level, | |
3586 | available on all machines since it does not require that the host | |
3587 | have /proc support or the relevant include files, is to create a bfd | |
3588 | section for each of the prstatus, prpsinfo, and fpregset structures, | |
3589 | without any interpretation of their contents. With just this support, | |
3590 | the bfd client will have to interpret the structures itself. Even with | |
3591 | /proc support, it might want these full structures for it's own reasons. | |
244ffee7 | 3592 | |
32090b8e KR |
3593 | In the second level of support, where HAVE_PROCFS is defined, bfd will |
3594 | pick apart the structures to gather some additional information that | |
3595 | clients may want, such as the general register set, the name of the | |
3596 | exec'ed file and its arguments, the signal (if any) that caused the | |
3597 | core dump, etc. | |
244ffee7 | 3598 | |
32090b8e | 3599 | */ |
244ffee7 | 3600 | |
32090b8e | 3601 | static boolean |
1c6042ee ILT |
3602 | elf_corefile_note (abfd, hdr) |
3603 | bfd *abfd; | |
3604 | Elf_Internal_Phdr *hdr; | |
244ffee7 | 3605 | { |
32090b8e KR |
3606 | Elf_External_Note *x_note_p; /* Elf note, external form */ |
3607 | Elf_Internal_Note i_note; /* Elf note, internal form */ | |
3608 | char *buf = NULL; /* Entire note segment contents */ | |
3609 | char *namedata; /* Name portion of the note */ | |
3610 | char *descdata; /* Descriptor portion of the note */ | |
3611 | char *sectname; /* Name to use for new section */ | |
3612 | long filepos; /* File offset to descriptor data */ | |
3613 | asection *newsect; | |
3614 | ||
3615 | if (hdr->p_filesz > 0 | |
b9d5cdf0 | 3616 | && (buf = (char *) malloc (hdr->p_filesz)) != NULL |
32090b8e KR |
3617 | && bfd_seek (abfd, hdr->p_offset, SEEK_SET) != -1 |
3618 | && bfd_read ((PTR) buf, hdr->p_filesz, 1, abfd) == hdr->p_filesz) | |
3619 | { | |
3620 | x_note_p = (Elf_External_Note *) buf; | |
3621 | while ((char *) x_note_p < (buf + hdr->p_filesz)) | |
3622 | { | |
3623 | i_note.namesz = bfd_h_get_32 (abfd, (bfd_byte *) x_note_p->namesz); | |
3624 | i_note.descsz = bfd_h_get_32 (abfd, (bfd_byte *) x_note_p->descsz); | |
3625 | i_note.type = bfd_h_get_32 (abfd, (bfd_byte *) x_note_p->type); | |
3626 | namedata = x_note_p->name; | |
3627 | descdata = namedata + BFD_ALIGN (i_note.namesz, 4); | |
3628 | filepos = hdr->p_offset + (descdata - buf); | |
3629 | switch (i_note.type) | |
3630 | { | |
3631 | case NT_PRSTATUS: | |
3632 | /* process descdata as prstatus info */ | |
2e03ce18 ILT |
3633 | if (! bfd_prstatus (abfd, descdata, i_note.descsz, filepos)) |
3634 | return false; | |
32090b8e KR |
3635 | sectname = ".prstatus"; |
3636 | break; | |
3637 | case NT_FPREGSET: | |
3638 | /* process descdata as fpregset info */ | |
2e03ce18 ILT |
3639 | if (! bfd_fpregset (abfd, descdata, i_note.descsz, filepos)) |
3640 | return false; | |
32090b8e KR |
3641 | sectname = ".fpregset"; |
3642 | break; | |
3643 | case NT_PRPSINFO: | |
3644 | /* process descdata as prpsinfo */ | |
2e03ce18 ILT |
3645 | if (! bfd_prpsinfo (abfd, descdata, i_note.descsz, filepos)) |
3646 | return false; | |
32090b8e KR |
3647 | sectname = ".prpsinfo"; |
3648 | break; | |
3649 | default: | |
3650 | /* Unknown descriptor, just ignore it. */ | |
3651 | sectname = NULL; | |
3652 | break; | |
3653 | } | |
3654 | if (sectname != NULL) | |
3655 | { | |
3656 | newsect = bfd_make_section (abfd, sectname); | |
2e03ce18 ILT |
3657 | if (newsect == NULL) |
3658 | return false; | |
32090b8e KR |
3659 | newsect->_raw_size = i_note.descsz; |
3660 | newsect->filepos = filepos; | |
3661 | newsect->flags = SEC_ALLOC | SEC_HAS_CONTENTS; | |
3662 | newsect->alignment_power = 2; | |
3663 | } | |
3664 | x_note_p = (Elf_External_Note *) | |
3665 | (descdata + BFD_ALIGN (i_note.descsz, 4)); | |
3666 | } | |
3667 | } | |
3668 | if (buf != NULL) | |
3669 | { | |
3670 | free (buf); | |
3671 | } | |
b9d5cdf0 DM |
3672 | else if (hdr->p_filesz > 0) |
3673 | { | |
d1ad85a6 | 3674 | bfd_set_error (bfd_error_no_memory); |
b9d5cdf0 DM |
3675 | return false; |
3676 | } | |
32090b8e | 3677 | return true; |
244ffee7 | 3678 | |
244ffee7 JK |
3679 | } |
3680 | ||
32090b8e KR |
3681 | /* Core files are simply standard ELF formatted files that partition |
3682 | the file using the execution view of the file (program header table) | |
3683 | rather than the linking view. In fact, there is no section header | |
3684 | table in a core file. | |
3685 | ||
3686 | The process status information (including the contents of the general | |
3687 | register set) and the floating point register set are stored in a | |
3688 | segment of type PT_NOTE. We handcraft a couple of extra bfd sections | |
3689 | that allow standard bfd access to the general registers (.reg) and the | |
3690 | floating point registers (.reg2). | |
3691 | ||
3692 | */ | |
3693 | ||
3694 | bfd_target * | |
1c6042ee ILT |
3695 | elf_core_file_p (abfd) |
3696 | bfd *abfd; | |
244ffee7 | 3697 | { |
32090b8e KR |
3698 | Elf_External_Ehdr x_ehdr; /* Elf file header, external form */ |
3699 | Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */ | |
3700 | Elf_External_Phdr x_phdr; /* Program header table entry, external form */ | |
3701 | Elf_Internal_Phdr *i_phdrp; /* Program header table, internal form */ | |
3702 | unsigned int phindex; | |
d6439785 | 3703 | struct elf_backend_data *ebd; |
244ffee7 | 3704 | |
32090b8e KR |
3705 | /* Read in the ELF header in external format. */ |
3706 | ||
3707 | if (bfd_read ((PTR) & x_ehdr, sizeof (x_ehdr), 1, abfd) != sizeof (x_ehdr)) | |
244ffee7 | 3708 | { |
25057836 JL |
3709 | if (bfd_get_error () != bfd_error_system_call) |
3710 | bfd_set_error (bfd_error_wrong_format); | |
244ffee7 JK |
3711 | return NULL; |
3712 | } | |
32090b8e KR |
3713 | |
3714 | /* Now check to see if we have a valid ELF file, and one that BFD can | |
3715 | make use of. The magic number must match, the address size ('class') | |
3716 | and byte-swapping must match our XVEC entry, and it must have a | |
3717 | program header table (FIXME: See comments re segments at top of this | |
3718 | file). */ | |
3719 | ||
3720 | if (elf_file_p (&x_ehdr) == false) | |
244ffee7 | 3721 | { |
32090b8e | 3722 | wrong: |
d1ad85a6 | 3723 | bfd_set_error (bfd_error_wrong_format); |
32090b8e | 3724 | return NULL; |
244ffee7 | 3725 | } |
244ffee7 | 3726 | |
32090b8e | 3727 | /* FIXME, Check EI_VERSION here ! */ |
244ffee7 | 3728 | |
32090b8e KR |
3729 | { |
3730 | #if ARCH_SIZE == 32 | |
3731 | int desired_address_size = ELFCLASS32; | |
3732 | #endif | |
3733 | #if ARCH_SIZE == 64 | |
3734 | int desired_address_size = ELFCLASS64; | |
3735 | #endif | |
3736 | ||
3737 | if (x_ehdr.e_ident[EI_CLASS] != desired_address_size) | |
3738 | goto wrong; | |
3739 | } | |
3740 | ||
3741 | /* Switch xvec to match the specified byte order. */ | |
3742 | switch (x_ehdr.e_ident[EI_DATA]) | |
244ffee7 | 3743 | { |
32090b8e KR |
3744 | case ELFDATA2MSB: /* Big-endian */ |
3745 | if (abfd->xvec->byteorder_big_p == false) | |
3746 | goto wrong; | |
244ffee7 | 3747 | break; |
32090b8e KR |
3748 | case ELFDATA2LSB: /* Little-endian */ |
3749 | if (abfd->xvec->byteorder_big_p == true) | |
3750 | goto wrong; | |
244ffee7 | 3751 | break; |
32090b8e KR |
3752 | case ELFDATANONE: /* No data encoding specified */ |
3753 | default: /* Unknown data encoding specified */ | |
3754 | goto wrong; | |
244ffee7 JK |
3755 | } |
3756 | ||
32090b8e KR |
3757 | /* Allocate an instance of the elf_obj_tdata structure and hook it up to |
3758 | the tdata pointer in the bfd. */ | |
244ffee7 | 3759 | |
32090b8e KR |
3760 | elf_tdata (abfd) = |
3761 | (struct elf_obj_tdata *) bfd_zalloc (abfd, sizeof (struct elf_obj_tdata)); | |
3762 | if (elf_tdata (abfd) == NULL) | |
244ffee7 | 3763 | { |
d1ad85a6 | 3764 | bfd_set_error (bfd_error_no_memory); |
32090b8e | 3765 | return NULL; |
244ffee7 | 3766 | } |
244ffee7 | 3767 | |
32090b8e | 3768 | /* FIXME, `wrong' returns from this point onward, leak memory. */ |
244ffee7 | 3769 | |
32090b8e KR |
3770 | /* Now that we know the byte order, swap in the rest of the header */ |
3771 | i_ehdrp = elf_elfheader (abfd); | |
3772 | elf_swap_ehdr_in (abfd, &x_ehdr, i_ehdrp); | |
3773 | #if DEBUG & 1 | |
3774 | elf_debug_file (i_ehdrp); | |
3775 | #endif | |
244ffee7 | 3776 | |
d6439785 JL |
3777 | ebd = get_elf_backend_data (abfd); |
3778 | ||
3779 | /* Check that the ELF e_machine field matches what this particular | |
3780 | BFD format expects. */ | |
3781 | if (ebd->elf_machine_code != i_ehdrp->e_machine) | |
3782 | { | |
3783 | bfd_target **target_ptr; | |
3784 | ||
3785 | if (ebd->elf_machine_code != EM_NONE) | |
3786 | goto wrong; | |
3787 | ||
3788 | /* This is the generic ELF target. Let it match any ELF target | |
3789 | for which we do not have a specific backend. */ | |
3790 | for (target_ptr = bfd_target_vector; *target_ptr != NULL; target_ptr++) | |
3791 | { | |
3792 | struct elf_backend_data *back; | |
3793 | ||
3794 | if ((*target_ptr)->flavour != bfd_target_elf_flavour) | |
3795 | continue; | |
3796 | back = (struct elf_backend_data *) (*target_ptr)->backend_data; | |
3797 | if (back->elf_machine_code == i_ehdrp->e_machine) | |
3798 | { | |
3799 | /* target_ptr is an ELF backend which matches this | |
3800 | object file, so reject the generic ELF target. */ | |
3801 | goto wrong; | |
3802 | } | |
3803 | } | |
3804 | } | |
3805 | ||
32090b8e KR |
3806 | /* If there is no program header, or the type is not a core file, then |
3807 | we are hosed. */ | |
3808 | if (i_ehdrp->e_phoff == 0 || i_ehdrp->e_type != ET_CORE) | |
3809 | goto wrong; | |
244ffee7 | 3810 | |
32090b8e KR |
3811 | /* Allocate space for a copy of the program header table in |
3812 | internal form, seek to the program header table in the file, | |
3813 | read it in, and convert it to internal form. As a simple sanity | |
3814 | check, verify that the what BFD thinks is the size of each program | |
3815 | header table entry actually matches the size recorded in the file. */ | |
3816 | ||
3817 | if (i_ehdrp->e_phentsize != sizeof (x_phdr)) | |
3818 | goto wrong; | |
3819 | i_phdrp = (Elf_Internal_Phdr *) | |
3820 | bfd_alloc (abfd, sizeof (*i_phdrp) * i_ehdrp->e_phnum); | |
3821 | if (!i_phdrp) | |
244ffee7 | 3822 | { |
d1ad85a6 | 3823 | bfd_set_error (bfd_error_no_memory); |
32090b8e KR |
3824 | return NULL; |
3825 | } | |
3826 | if (bfd_seek (abfd, i_ehdrp->e_phoff, SEEK_SET) == -1) | |
25057836 | 3827 | return NULL; |
32090b8e KR |
3828 | for (phindex = 0; phindex < i_ehdrp->e_phnum; phindex++) |
3829 | { | |
3830 | if (bfd_read ((PTR) & x_phdr, sizeof (x_phdr), 1, abfd) | |
3831 | != sizeof (x_phdr)) | |
25057836 | 3832 | return NULL; |
32090b8e | 3833 | elf_swap_phdr_in (abfd, &x_phdr, i_phdrp + phindex); |
244ffee7 JK |
3834 | } |
3835 | ||
32090b8e KR |
3836 | /* Once all of the program headers have been read and converted, we |
3837 | can start processing them. */ | |
244ffee7 | 3838 | |
32090b8e KR |
3839 | for (phindex = 0; phindex < i_ehdrp->e_phnum; phindex++) |
3840 | { | |
3841 | bfd_section_from_phdr (abfd, i_phdrp + phindex, phindex); | |
3842 | if ((i_phdrp + phindex)->p_type == PT_NOTE) | |
3843 | { | |
2e03ce18 ILT |
3844 | if (! elf_corefile_note (abfd, i_phdrp + phindex)) |
3845 | return NULL; | |
32090b8e KR |
3846 | } |
3847 | } | |
244ffee7 | 3848 | |
32090b8e | 3849 | /* Remember the entry point specified in the ELF file header. */ |
244ffee7 | 3850 | |
32090b8e | 3851 | bfd_get_start_address (abfd) = i_ehdrp->e_entry; |
244ffee7 | 3852 | |
32090b8e | 3853 | return abfd->xvec; |
244ffee7 | 3854 | } |
6ec3bb6a ILT |
3855 | \f |
3856 | /* ELF linker code. */ | |
3857 | ||
3858 | static boolean elf_link_add_object_symbols | |
3859 | PARAMS ((bfd *, struct bfd_link_info *)); | |
3860 | static boolean elf_link_add_archive_symbols | |
3861 | PARAMS ((bfd *, struct bfd_link_info *)); | |
013dec1a ILT |
3862 | static INLINE boolean elf_link_record_dynamic_symbol |
3863 | PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *)); | |
3864 | static boolean elf_link_create_dynamic_sections | |
3865 | PARAMS ((bfd *, struct bfd_link_info *)); | |
3866 | static boolean elf_adjust_dynamic_symbol | |
3867 | PARAMS ((struct elf_link_hash_entry *, PTR)); | |
6ec3bb6a ILT |
3868 | |
3869 | /* Given an ELF BFD, add symbols to the global hash table as | |
3870 | appropriate. */ | |
3871 | ||
3872 | boolean | |
3873 | elf_bfd_link_add_symbols (abfd, info) | |
3874 | bfd *abfd; | |
3875 | struct bfd_link_info *info; | |
3876 | { | |
3877 | switch (bfd_get_format (abfd)) | |
3878 | { | |
3879 | case bfd_object: | |
3880 | return elf_link_add_object_symbols (abfd, info); | |
3881 | case bfd_archive: | |
3882 | return elf_link_add_archive_symbols (abfd, info); | |
3883 | default: | |
3884 | bfd_set_error (bfd_error_wrong_format); | |
3885 | return false; | |
3886 | } | |
3887 | } | |
3888 | ||
3889 | /* Add symbols from an ELF archive file to the linker hash table. We | |
3890 | don't use _bfd_generic_link_add_archive_symbols because of a | |
3891 | problem which arises on UnixWare. The UnixWare libc.so is an | |
3892 | archive which includes an entry libc.so.1 which defines a bunch of | |
3893 | symbols. The libc.so archive also includes a number of other | |
3894 | object files, which also define symbols, some of which are the same | |
3895 | as those defined in libc.so.1. Correct linking requires that we | |
3896 | consider each object file in turn, and include it if it defines any | |
3897 | symbols we need. _bfd_generic_link_add_archive_symbols does not do | |
3898 | this; it looks through the list of undefined symbols, and includes | |
3899 | any object file which defines them. When this algorithm is used on | |
3900 | UnixWare, it winds up pulling in libc.so.1 early and defining a | |
3901 | bunch of symbols. This means that some of the other objects in the | |
3902 | archive are not included in the link, which is incorrect since they | |
3903 | precede libc.so.1 in the archive. | |
3904 | ||
3905 | Fortunately, ELF archive handling is simpler than that done by | |
3906 | _bfd_generic_link_add_archive_symbols, which has to allow for a.out | |
3907 | oddities. In ELF, if we find a symbol in the archive map, and the | |
3908 | symbol is currently undefined, we know that we must pull in that | |
3909 | object file. | |
3910 | ||
3911 | Unfortunately, we do have to make multiple passes over the symbol | |
3912 | table until nothing further is resolved. */ | |
3913 | ||
3914 | static boolean | |
3915 | elf_link_add_archive_symbols (abfd, info) | |
3916 | bfd *abfd; | |
3917 | struct bfd_link_info *info; | |
3918 | { | |
3919 | symindex c; | |
3920 | boolean *defined = NULL; | |
3921 | boolean *included = NULL; | |
3922 | carsym *symdefs; | |
3923 | boolean loop; | |
3924 | ||
3925 | if (! bfd_has_map (abfd)) | |
3926 | { | |
3927 | bfd_set_error (bfd_error_no_symbols); | |
3928 | return false; | |
3929 | } | |
3930 | ||
3931 | /* Keep track of all symbols we know to be already defined, and all | |
3932 | files we know to be already included. This is to speed up the | |
3933 | second and subsequent passes. */ | |
3934 | c = bfd_ardata (abfd)->symdef_count; | |
3935 | if (c == 0) | |
3936 | return true; | |
3937 | defined = (boolean *) malloc (c * sizeof (boolean)); | |
3938 | included = (boolean *) malloc (c * sizeof (boolean)); | |
3939 | if (defined == (boolean *) NULL || included == (boolean *) NULL) | |
3940 | { | |
3941 | bfd_set_error (bfd_error_no_memory); | |
3942 | goto error_return; | |
3943 | } | |
3944 | memset (defined, 0, c * sizeof (boolean)); | |
3945 | memset (included, 0, c * sizeof (boolean)); | |
3946 | ||
3947 | symdefs = bfd_ardata (abfd)->symdefs; | |
3948 | ||
3949 | do | |
3950 | { | |
3951 | file_ptr last; | |
3952 | symindex i; | |
3953 | carsym *symdef; | |
3954 | carsym *symdefend; | |
3955 | ||
3956 | loop = false; | |
3957 | last = -1; | |
3958 | ||
3959 | symdef = symdefs; | |
3960 | symdefend = symdef + c; | |
3961 | for (i = 0; symdef < symdefend; symdef++, i++) | |
3962 | { | |
3963 | struct elf_link_hash_entry *h; | |
3964 | bfd *element; | |
3965 | struct bfd_link_hash_entry *undefs_tail; | |
3966 | symindex mark; | |
3967 | ||
3968 | if (defined[i] || included[i]) | |
3969 | continue; | |
3970 | if (symdef->file_offset == last) | |
3971 | { | |
3972 | included[i] = true; | |
3973 | continue; | |
3974 | } | |
3975 | ||
3976 | h = elf_link_hash_lookup (elf_hash_table (info), symdef->name, | |
3977 | false, false, false); | |
3978 | if (h == (struct elf_link_hash_entry *) NULL) | |
3979 | continue; | |
3980 | if (h->root.type != bfd_link_hash_undefined) | |
3981 | { | |
3982 | defined[i] = true; | |
3983 | continue; | |
3984 | } | |
3985 | ||
3986 | /* We need to include this archive member. */ | |
3987 | ||
3988 | element = _bfd_get_elt_at_filepos (abfd, symdef->file_offset); | |
3989 | if (element == (bfd *) NULL) | |
3990 | goto error_return; | |
3991 | ||
3992 | if (! bfd_check_format (element, bfd_object)) | |
3993 | goto error_return; | |
3994 | ||
3995 | /* Doublecheck that we have not included this object | |
3996 | already--it should be impossible, but there may be | |
3997 | something wrong with the archive. */ | |
3998 | if (element->archive_pass != 0) | |
3999 | { | |
4000 | bfd_set_error (bfd_error_bad_value); | |
4001 | goto error_return; | |
4002 | } | |
4003 | element->archive_pass = 1; | |
4004 | ||
4005 | undefs_tail = info->hash->undefs_tail; | |
4006 | ||
4007 | if (! (*info->callbacks->add_archive_element) (info, element, | |
4008 | symdef->name)) | |
4009 | goto error_return; | |
4010 | if (! elf_link_add_object_symbols (element, info)) | |
4011 | goto error_return; | |
4012 | ||
4013 | /* If there are any new undefined symbols, we need to make | |
4014 | another pass through the archive in order to see whether | |
4015 | they can be defined. FIXME: This isn't perfect, because | |
4016 | common symbols wind up on undefs_tail and because an | |
4017 | undefined symbol which is defined later on in this pass | |
4018 | does not require another pass. This isn't a bug, but it | |
4019 | does make the code less efficient than it could be. */ | |
4020 | if (undefs_tail != info->hash->undefs_tail) | |
4021 | loop = true; | |
4022 | ||
4023 | /* Look backward to mark all symbols from this object file | |
4024 | which we have already seen in this pass. */ | |
4025 | mark = i; | |
4026 | do | |
4027 | { | |
4028 | included[mark] = true; | |
4029 | if (mark == 0) | |
4030 | break; | |
4031 | --mark; | |
4032 | } | |
4033 | while (symdefs[mark].file_offset == symdef->file_offset); | |
4034 | ||
4035 | /* We mark subsequent symbols from this object file as we go | |
4036 | on through the loop. */ | |
4037 | last = symdef->file_offset; | |
4038 | } | |
4039 | } | |
4040 | while (loop); | |
4041 | ||
4042 | free (defined); | |
4043 | free (included); | |
4044 | ||
4045 | return true; | |
4046 | ||
4047 | error_return: | |
4048 | if (defined != (boolean *) NULL) | |
4049 | free (defined); | |
4050 | if (included != (boolean *) NULL) | |
4051 | free (included); | |
4052 | return false; | |
4053 | } | |
4054 | ||
013dec1a ILT |
4055 | /* Record a new dynamic symbol. We record the dynamic symbols as we |
4056 | read the input files, since we need to have a list of all of them | |
4057 | before we can determine the final sizes of the output sections. */ | |
4058 | ||
4059 | static INLINE boolean | |
4060 | elf_link_record_dynamic_symbol (info, h) | |
4061 | struct bfd_link_info *info; | |
4062 | struct elf_link_hash_entry *h; | |
4063 | { | |
4064 | if (h->dynindx == -1) | |
4065 | { | |
4066 | h->dynindx = elf_hash_table (info)->dynsymcount; | |
4067 | ++elf_hash_table (info)->dynsymcount; | |
4068 | h->dynstr_index = bfd_add_to_strtab (elf_hash_table (info)->dynobj, | |
4069 | elf_hash_table (info)->dynstr, | |
4070 | h->root.root.string); | |
4071 | if (h->dynstr_index == (unsigned long) -1) | |
4072 | return false; | |
4073 | } | |
4074 | ||
4075 | return true; | |
4076 | } | |
4077 | ||
6ec3bb6a ILT |
4078 | /* Add symbols from an ELF object file to the linker hash table. */ |
4079 | ||
4080 | static boolean | |
4081 | elf_link_add_object_symbols (abfd, info) | |
4082 | bfd *abfd; | |
4083 | struct bfd_link_info *info; | |
4084 | { | |
4085 | boolean (*add_symbol_hook) PARAMS ((bfd *, struct bfd_link_info *, | |
4086 | const Elf_Internal_Sym *, | |
4087 | const char **, flagword *, | |
4088 | asection **, bfd_vma *)); | |
4089 | boolean collect; | |
4090 | Elf_Internal_Shdr *hdr; | |
4091 | size_t symcount; | |
4092 | size_t extsymcount; | |
5315c428 | 4093 | size_t extsymoff; |
6ec3bb6a ILT |
4094 | Elf_External_Sym *buf = NULL; |
4095 | struct elf_link_hash_entry **sym_hash; | |
013dec1a ILT |
4096 | boolean dynamic; |
4097 | Elf_External_Dyn *dynbuf = NULL; | |
4098 | struct elf_link_hash_entry *weaks; | |
6ec3bb6a ILT |
4099 | Elf_External_Sym *esym; |
4100 | Elf_External_Sym *esymend; | |
4101 | ||
4102 | add_symbol_hook = get_elf_backend_data (abfd)->elf_add_symbol_hook; | |
4103 | collect = get_elf_backend_data (abfd)->collect; | |
4104 | ||
4105 | hdr = &elf_tdata (abfd)->symtab_hdr; | |
4106 | symcount = hdr->sh_size / sizeof (Elf_External_Sym); | |
4107 | ||
4108 | /* The sh_info field of the symtab header tells us where the | |
4109 | external symbols start. We don't care about the local symbols at | |
4110 | this point. */ | |
5315c428 ILT |
4111 | if (elf_bad_symtab (abfd)) |
4112 | { | |
4113 | extsymcount = symcount; | |
4114 | extsymoff = 0; | |
4115 | } | |
4116 | else | |
4117 | { | |
4118 | extsymcount = symcount - hdr->sh_info; | |
4119 | extsymoff = hdr->sh_info; | |
4120 | } | |
6ec3bb6a ILT |
4121 | |
4122 | buf = (Elf_External_Sym *) malloc (extsymcount * sizeof (Elf_External_Sym)); | |
4123 | if (buf == NULL && extsymcount != 0) | |
4124 | { | |
4125 | bfd_set_error (bfd_error_no_memory); | |
4126 | goto error_return; | |
4127 | } | |
4128 | ||
013dec1a ILT |
4129 | /* We store a pointer to the hash table entry for each external |
4130 | symbol. */ | |
6ec3bb6a ILT |
4131 | sym_hash = ((struct elf_link_hash_entry **) |
4132 | bfd_alloc (abfd, | |
4133 | extsymcount * sizeof (struct elf_link_hash_entry *))); | |
4134 | if (sym_hash == NULL) | |
4135 | { | |
4136 | bfd_set_error (bfd_error_no_memory); | |
4137 | goto error_return; | |
4138 | } | |
4139 | elf_sym_hashes (abfd) = sym_hash; | |
4140 | ||
013dec1a ILT |
4141 | if (elf_elfheader (abfd)->e_type != ET_DYN) |
4142 | dynamic = false; | |
4143 | else | |
4144 | { | |
4145 | asection *s; | |
4146 | const char *name; | |
4147 | unsigned long strindex; | |
4148 | ||
4149 | dynamic = true; | |
4150 | ||
4151 | /* You can't use -r against a dynamic object. There's no hope | |
4152 | of using a dynamic object which does not exactly match the | |
4153 | format of the output file. */ | |
4154 | if (info->relocateable | |
4155 | || info->hash->creator != abfd->xvec) | |
4156 | { | |
4157 | bfd_set_error (bfd_error_invalid_operation); | |
4158 | goto error_return; | |
4159 | } | |
4160 | ||
4161 | /* Find the name to use in a DT_NEEDED entry that refers to this | |
4162 | object. If the object has a DT_SONAME entry, we use it. | |
4163 | Otherwise, we use the file name. */ | |
4164 | name = bfd_get_filename (abfd); | |
4165 | s = bfd_get_section_by_name (abfd, ".dynamic"); | |
4166 | if (s != NULL) | |
4167 | { | |
4168 | Elf_External_Dyn *extdyn; | |
4169 | Elf_External_Dyn *extdynend; | |
4170 | ||
4171 | dynbuf = (Elf_External_Dyn *) malloc (s->_raw_size); | |
4172 | if (dynbuf == NULL) | |
4173 | { | |
4174 | bfd_set_error (bfd_error_no_memory); | |
4175 | goto error_return; | |
4176 | } | |
4177 | ||
4178 | if (! bfd_get_section_contents (abfd, s, (PTR) dynbuf, | |
4179 | (file_ptr) 0, s->_raw_size)) | |
4180 | goto error_return; | |
4181 | ||
4182 | extdyn = dynbuf; | |
4183 | extdynend = extdyn + s->_raw_size / sizeof (Elf_External_Dyn); | |
4184 | for (; extdyn < extdynend; extdyn++) | |
4185 | { | |
4186 | Elf_Internal_Dyn dyn; | |
4187 | ||
4188 | elf_swap_dyn_in (abfd, extdyn, &dyn); | |
4189 | if (dyn.d_tag == DT_SONAME) | |
4190 | { | |
4191 | int elfsec; | |
4192 | unsigned long link; | |
4193 | ||
4194 | elfsec = elf_section_from_bfd_section (abfd, s); | |
4195 | if (elfsec == -1) | |
4196 | goto error_return; | |
4197 | link = elf_elfsections (abfd)[elfsec]->sh_link; | |
4198 | name = elf_string_from_elf_section (abfd, link, | |
4199 | dyn.d_un.d_val); | |
4200 | if (name == NULL) | |
4201 | goto error_return; | |
4202 | ||
4203 | break; | |
4204 | } | |
4205 | } | |
4206 | ||
4207 | free (dynbuf); | |
4208 | dynbuf = NULL; | |
4209 | } | |
4210 | ||
4211 | /* We do not want to include any of the sections in a dynamic | |
4212 | object in the output file. We hack by simply clobbering the | |
4213 | list of sections in the BFD. This could be handled more | |
4214 | cleanly by, say, a new section flag; the existing | |
4215 | SEC_NEVER_LOAD flag is not the one we want, because that one | |
4216 | still implies that the section takes up space in the output | |
4217 | file. */ | |
4218 | abfd->sections = NULL; | |
4219 | ||
4220 | /* If this is the first dynamic object found in the link, create | |
4221 | the special sections required for dynamic linking. We need | |
4222 | to put them somewhere, and attaching them to the first | |
4223 | dynamic object is as good place as any. */ | |
4224 | if (elf_hash_table (info)->dynobj == NULL) | |
4225 | { | |
4226 | if (! elf_link_create_dynamic_sections (abfd, info)) | |
4227 | goto error_return; | |
4228 | elf_hash_table (info)->dynobj = abfd; | |
4229 | } | |
4230 | ||
4231 | /* Add a DT_NEEDED entry for this dynamic object. */ | |
4232 | strindex = bfd_add_to_strtab (abfd, | |
4233 | elf_hash_table (info)->dynstr, | |
4234 | name); | |
4235 | ||
4236 | if (strindex == (unsigned long) -1) | |
4237 | goto error_return; | |
4238 | if (! elf_add_dynamic_entry (info, DT_NEEDED, strindex)) | |
4239 | goto error_return; | |
4240 | } | |
4241 | ||
6ec3bb6a | 4242 | if (bfd_seek (abfd, |
5315c428 | 4243 | hdr->sh_offset + extsymoff * sizeof (Elf_External_Sym), |
6ec3bb6a ILT |
4244 | SEEK_SET) != 0 |
4245 | || (bfd_read ((PTR) buf, sizeof (Elf_External_Sym), extsymcount, abfd) | |
4246 | != extsymcount * sizeof (Elf_External_Sym))) | |
4247 | goto error_return; | |
4248 | ||
013dec1a ILT |
4249 | weaks = NULL; |
4250 | ||
6ec3bb6a ILT |
4251 | esymend = buf + extsymcount; |
4252 | for (esym = buf; esym < esymend; esym++, sym_hash++) | |
4253 | { | |
4254 | Elf_Internal_Sym sym; | |
4255 | int bind; | |
4256 | bfd_vma value; | |
4257 | asection *sec; | |
4258 | flagword flags; | |
4259 | const char *name; | |
013dec1a ILT |
4260 | struct elf_link_hash_entry *h = NULL; |
4261 | boolean definition; | |
6ec3bb6a ILT |
4262 | |
4263 | elf_swap_symbol_in (abfd, esym, &sym); | |
4264 | ||
4265 | flags = BSF_NO_FLAGS; | |
4266 | sec = NULL; | |
4267 | value = sym.st_value; | |
4268 | *sym_hash = NULL; | |
4269 | ||
4270 | bind = ELF_ST_BIND (sym.st_info); | |
4271 | if (bind == STB_LOCAL) | |
4272 | { | |
4273 | /* This should be impossible, since ELF requires that all | |
4274 | global symbols follow all local symbols, and that sh_info | |
5315c428 ILT |
4275 | point to the first global symbol. Unfortunatealy, Irix 5 |
4276 | screws this up. */ | |
4277 | continue; | |
6ec3bb6a ILT |
4278 | } |
4279 | else if (bind == STB_GLOBAL) | |
4280 | flags = BSF_GLOBAL; | |
4281 | else if (bind == STB_WEAK) | |
4282 | flags = BSF_WEAK; | |
4283 | else | |
4284 | { | |
4285 | /* Leave it up to the processor backend. */ | |
4286 | } | |
4287 | ||
4288 | if (sym.st_shndx == SHN_UNDEF) | |
4289 | sec = &bfd_und_section; | |
4290 | else if (sym.st_shndx > 0 && sym.st_shndx < SHN_LORESERVE) | |
4291 | { | |
4292 | sec = section_from_elf_index (abfd, sym.st_shndx); | |
4293 | if (sec == NULL) | |
4294 | goto error_return; | |
4295 | value -= sec->vma; | |
4296 | } | |
4297 | else if (sym.st_shndx == SHN_ABS) | |
4298 | sec = &bfd_abs_section; | |
4299 | else if (sym.st_shndx == SHN_COMMON) | |
4300 | { | |
4301 | sec = &bfd_com_section; | |
4302 | /* What ELF calls the size we call the value. What ELF | |
4303 | calls the value we call the alignment. */ | |
4304 | value = sym.st_size; | |
4305 | } | |
4306 | else | |
4307 | { | |
4308 | /* Leave it up to the processor backend. */ | |
4309 | } | |
4310 | ||
4311 | name = elf_string_from_elf_section (abfd, hdr->sh_link, sym.st_name); | |
4312 | if (name == (const char *) NULL) | |
4313 | goto error_return; | |
4314 | ||
4315 | if (add_symbol_hook) | |
4316 | { | |
4317 | if (! (*add_symbol_hook) (abfd, info, &sym, &name, &flags, &sec, | |
4318 | &value)) | |
4319 | goto error_return; | |
4320 | ||
4321 | /* The hook function sets the name to NULL if this symbol | |
4322 | should be skipped for some reason. */ | |
4323 | if (name == (const char *) NULL) | |
4324 | continue; | |
4325 | } | |
4326 | ||
4327 | /* Sanity check that all possibilities were handled. */ | |
4328 | if (flags == BSF_NO_FLAGS || sec == (asection *) NULL) | |
4329 | { | |
4330 | bfd_set_error (bfd_error_bad_value); | |
4331 | goto error_return; | |
4332 | } | |
4333 | ||
013dec1a ILT |
4334 | if (sec == &bfd_und_section |
4335 | || bfd_is_com_section (sec)) | |
4336 | definition = false; | |
4337 | else | |
4338 | definition = true; | |
4339 | ||
4340 | if (info->hash->creator->flavour == bfd_target_elf_flavour) | |
4341 | { | |
4342 | /* We need to look up the symbol now in order to get some of | |
4343 | the dynamic object handling right. We pass the hash | |
4344 | table entry in to _bfd_generic_link_add_one_symbol so | |
4345 | that it does not have to look it up again. */ | |
4346 | h = elf_link_hash_lookup (elf_hash_table (info), name, | |
4347 | true, false, false); | |
4348 | if (h == NULL) | |
4349 | goto error_return; | |
4350 | *sym_hash = h; | |
4351 | ||
4352 | /* If we are looking at a dynamic object, and this is a | |
4353 | definition, we need to see if it has already been defined | |
4354 | by some other object. If it has, we want to use the | |
4355 | existing definition, and we do not want to report a | |
4356 | multiple symbol definition error; we do this by | |
4357 | clobbering sec to be bfd_und_section. */ | |
4358 | if (dynamic && definition) | |
4359 | { | |
4360 | if (h->root.type == bfd_link_hash_defined) | |
4361 | sec = &bfd_und_section; | |
4362 | } | |
4363 | ||
4364 | /* Similarly, if we are not looking at a dynamic object, and | |
4365 | we have a definition, we want to override any definition | |
4366 | we may have from a dynamic object. Symbols from regular | |
4367 | files always take precedence over symbols from dynamic | |
4368 | objects, even if they are defined after the dynamic | |
4369 | object in the link. */ | |
4370 | if (! dynamic | |
4371 | && definition | |
4372 | && h->root.type == bfd_link_hash_defined | |
4373 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
4374 | && (bfd_get_flavour (h->root.u.def.section->owner) | |
4375 | == bfd_target_elf_flavour) | |
4376 | && (elf_elfheader (h->root.u.def.section->owner)->e_type | |
4377 | == ET_DYN)) | |
4378 | { | |
4379 | /* Change the hash table entry to undefined, and let | |
4380 | _bfd_generic_link_add_one_symbol do the right thing | |
4381 | with the new definition. */ | |
4382 | h->root.type = bfd_link_hash_undefined; | |
4383 | h->root.u.undef.abfd = h->root.u.def.section->owner; | |
4384 | } | |
4385 | } | |
4386 | ||
4387 | if (! (_bfd_generic_link_add_one_symbol | |
4388 | (info, abfd, name, flags, sec, value, (const char *) NULL, | |
4389 | false, collect, (struct bfd_link_hash_entry **) sym_hash))) | |
6ec3bb6a ILT |
4390 | goto error_return; |
4391 | ||
013dec1a ILT |
4392 | if (dynamic |
4393 | && definition | |
4394 | && (flags & BSF_WEAK) != 0 | |
4395 | && ELF_ST_TYPE (sym.st_info) != STT_FUNC | |
4396 | && (*sym_hash)->weakdef == NULL) | |
4397 | { | |
4398 | /* Keep a list of all weak defined non function symbols from | |
4399 | a dynamic object, using the weakdef field. Later in this | |
4400 | function we will set the weakdef field to the correct | |
4401 | value. We only put non-function symbols from dynamic | |
4402 | objects on this list, because that happens to be the only | |
4403 | time we need to know the normal symbol corresponding to a | |
4404 | weak symbol, and the information is time consuming to | |
4405 | figure out. If the weakdef field is not already NULL, | |
4406 | then this symbol was already defined by some previous | |
4407 | dynamic object, and we will be using that previous | |
4408 | definition anyhow. */ | |
4409 | ||
4410 | (*sym_hash)->weakdef = weaks; | |
4411 | weaks = *sym_hash; | |
4412 | } | |
4413 | ||
6ec3bb6a ILT |
4414 | if (info->hash->creator->flavour == bfd_target_elf_flavour) |
4415 | { | |
013dec1a ILT |
4416 | int old_flags; |
4417 | boolean dynsym; | |
4418 | int new_flag; | |
4419 | ||
6ec3bb6a ILT |
4420 | /* Remember the symbol size, type and alignment. */ |
4421 | if (sym.st_size != 0) | |
4422 | { | |
4423 | /* FIXME: We should probably somehow give a warning if | |
4424 | the symbol size changes. */ | |
013dec1a | 4425 | h->size = sym.st_size; |
6ec3bb6a ILT |
4426 | } |
4427 | if (sym.st_shndx == SHN_COMMON | |
013dec1a ILT |
4428 | && sym.st_value > h->align) |
4429 | h->align = sym.st_value; | |
6ec3bb6a ILT |
4430 | if (ELF_ST_TYPE (sym.st_info) != STT_NOTYPE) |
4431 | { | |
4432 | /* FIXME: We should probably somehow give a warning if | |
4433 | the symbol type changes. */ | |
013dec1a ILT |
4434 | h->type = ELF_ST_TYPE (sym.st_info); |
4435 | } | |
4436 | ||
4437 | /* Set a flag in the hash table entry indicating the type of | |
4438 | reference or definition we just found. Keep a count of | |
4439 | the number of dynamic symbols we find. A dynamic symbol | |
4440 | is one which is referenced or defined by both a regular | |
4441 | object and a shared object, or one which is referenced or | |
4442 | defined by more than one shared object. */ | |
4443 | old_flags = h->elf_link_hash_flags; | |
4444 | dynsym = false; | |
4445 | if (! dynamic) | |
4446 | { | |
4447 | if (! definition) | |
4448 | new_flag = ELF_LINK_HASH_REF_REGULAR; | |
4449 | else | |
4450 | new_flag = ELF_LINK_HASH_DEF_REGULAR; | |
4451 | if ((old_flags & (ELF_LINK_HASH_DEF_DYNAMIC | |
4452 | | ELF_LINK_HASH_REF_DYNAMIC)) != 0) | |
4453 | dynsym = true; | |
4454 | } | |
4455 | else | |
4456 | { | |
4457 | if (! definition) | |
4458 | new_flag = ELF_LINK_HASH_REF_DYNAMIC; | |
4459 | else | |
4460 | new_flag = ELF_LINK_HASH_DEF_DYNAMIC; | |
4461 | if ((old_flags & new_flag) != 0) | |
4462 | { | |
4463 | if (! definition) | |
4464 | new_flag = ELF_LINK_HASH_REF_DYNAMIC_MULTIPLE; | |
4465 | else | |
4466 | new_flag = ELF_LINK_HASH_DEF_DYNAMIC_MULTIPLE; | |
4467 | dynsym = true; | |
4468 | } | |
4469 | else | |
4470 | { | |
4471 | if ((old_flags & (ELF_LINK_HASH_DEF_REGULAR | |
4472 | | ELF_LINK_HASH_REF_REGULAR)) != 0) | |
4473 | dynsym = true; | |
4474 | } | |
4475 | } | |
4476 | ||
4477 | h->elf_link_hash_flags |= new_flag; | |
4478 | if (dynsym && h->dynindx == -1) | |
4479 | { | |
4480 | if (! elf_link_record_dynamic_symbol (info, h)) | |
4481 | goto error_return; | |
4482 | } | |
4483 | } | |
4484 | } | |
4485 | ||
4486 | /* Now set the weakdefs field correctly for all the weak defined | |
4487 | symbols we found. The only way to do this is to search all the | |
4488 | symbols. Since we only need the information for non functions in | |
4489 | dynamic objects, that's the only time we actually put anything on | |
4490 | the list WEAKS. We need this information so that if a regular | |
4491 | object refers to a symbol defined weakly in a dynamic object, the | |
4492 | real symbol in the dynamic object is also put in the dynamic | |
4493 | symbols; we also must arrange for both symbols to point to the | |
4494 | same memory location. We could handle the general case of symbol | |
4495 | aliasing, but a general symbol alias can only be generated in | |
4496 | assembler code, handling it correctly would be very time | |
4497 | consuming, and other ELF linkers don't handle general aliasing | |
4498 | either. */ | |
4499 | while (weaks != NULL) | |
4500 | { | |
4501 | struct elf_link_hash_entry *hlook; | |
4502 | asection *slook; | |
4503 | bfd_vma vlook; | |
4504 | struct elf_link_hash_entry **hpp; | |
4505 | struct elf_link_hash_entry **hppend; | |
4506 | ||
4507 | hlook = weaks; | |
4508 | weaks = hlook->weakdef; | |
4509 | hlook->weakdef = NULL; | |
4510 | ||
4511 | BFD_ASSERT (hlook->root.type == bfd_link_hash_defined); | |
4512 | slook = hlook->root.u.def.section; | |
4513 | vlook = hlook->root.u.def.value; | |
4514 | ||
4515 | hpp = elf_sym_hashes (abfd); | |
4516 | hppend = hpp + extsymcount; | |
4517 | for (; hpp < hppend; hpp++) | |
4518 | { | |
4519 | struct elf_link_hash_entry *h; | |
4520 | ||
4521 | h = *hpp; | |
4522 | if (h != hlook | |
4523 | && h->root.type == bfd_link_hash_defined | |
4524 | && h->root.u.def.section == slook | |
4525 | && h->root.u.def.value == vlook) | |
4526 | { | |
4527 | hlook->weakdef = h; | |
4528 | ||
4529 | /* If the weak definition is in the list of dynamic | |
4530 | symbols, make sure the real definition is put there | |
4531 | as well. */ | |
4532 | if (hlook->dynindx != -1 | |
4533 | && h->dynindx == -1) | |
4534 | { | |
4535 | if (! elf_link_record_dynamic_symbol (info, h)) | |
4536 | goto error_return; | |
4537 | } | |
4538 | ||
4539 | break; | |
6ec3bb6a ILT |
4540 | } |
4541 | } | |
4542 | } | |
4543 | ||
4544 | if (buf != NULL) | |
4545 | free (buf); | |
4546 | ||
4547 | return true; | |
4548 | ||
4549 | error_return: | |
4550 | if (buf != NULL) | |
4551 | free (buf); | |
013dec1a ILT |
4552 | if (dynbuf != NULL) |
4553 | free (dynbuf); | |
6ec3bb6a ILT |
4554 | return false; |
4555 | } | |
013dec1a ILT |
4556 | |
4557 | /* Create some sections which will be filled in with dynamic linking | |
4558 | information. The ABFD argument is an input file which is a dynamic | |
4559 | object. The dynamic sections take up virtual memory space when the | |
4560 | final executable is run, so we need to create them before addresses | |
4561 | are assigned to the output sections. We work out the actual | |
4562 | contents and size of these sections later. */ | |
4563 | ||
4564 | static boolean | |
4565 | elf_link_create_dynamic_sections (abfd, info) | |
4566 | bfd *abfd; | |
4567 | struct bfd_link_info *info; | |
4568 | { | |
4569 | flagword flags; | |
4570 | register asection *s; | |
4571 | struct elf_link_hash_entry *h; | |
4572 | struct elf_backend_data *bed; | |
4573 | ||
4574 | /* Note that we set the SEC_IN_MEMORY flag for all of these | |
4575 | sections. */ | |
4576 | flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY; | |
4577 | ||
4578 | s = bfd_make_section (abfd, ".interp"); | |
4579 | if (s == NULL | |
4580 | || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)) | |
4581 | return false; | |
4582 | ||
4583 | s = bfd_make_section (abfd, ".dynamic"); | |
4584 | if (s == NULL | |
4585 | || ! bfd_set_section_flags (abfd, s, flags) | |
4586 | || ! bfd_set_section_alignment (abfd, s, LOG_FILE_ALIGN)) | |
4587 | return false; | |
4588 | ||
4589 | /* The special symbol _DYNAMIC is always set to the start of the | |
4590 | .dynamic section. This call occurs before we have processed the | |
4591 | symbols for any dynamic object, so we don't have to worry about | |
4592 | overriding a dynamic definition. We could set _DYNAMIC in a | |
4593 | linker script, but we only want to define it if we are, in fact, | |
4594 | creating a .dynamic section. We don't want to define it if there | |
4595 | is no .dynamic section, since on some ELF platforms the start up | |
4596 | code examines it to decide how to initialize the process. */ | |
4597 | h = NULL; | |
4598 | if (! (_bfd_generic_link_add_one_symbol | |
4599 | (info, abfd, "_DYNAMIC", BSF_GLOBAL, s, (bfd_vma) 0, | |
4600 | (const char *) NULL, false, get_elf_backend_data (abfd)->collect, | |
4601 | (struct bfd_link_hash_entry **) &h))) | |
4602 | return false; | |
4603 | h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR; | |
4604 | ||
4605 | s = bfd_make_section (abfd, ".dynsym"); | |
4606 | if (s == NULL | |
4607 | || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY) | |
4608 | || ! bfd_set_section_alignment (abfd, s, LOG_FILE_ALIGN)) | |
4609 | return false; | |
4610 | ||
4611 | /* The first .dynsym symbol is a dummy. */ | |
4612 | elf_hash_table (info)->dynsymcount = 1; | |
4613 | ||
4614 | s = bfd_make_section (abfd, ".dynstr"); | |
4615 | if (s == NULL | |
4616 | || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)) | |
4617 | return false; | |
4618 | ||
4619 | /* Create a strtab to hold the dynamic symbol names. */ | |
4620 | elf_hash_table (info)->dynstr = bfd_new_strtab (abfd); | |
4621 | if (elf_hash_table (info)->dynstr == NULL) | |
4622 | return false; | |
4623 | ||
4624 | s = bfd_make_section (abfd, ".hash"); | |
4625 | if (s == NULL | |
4626 | || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY) | |
4627 | || ! bfd_set_section_alignment (abfd, s, LOG_FILE_ALIGN)) | |
4628 | return false; | |
4629 | ||
4630 | /* Let the backend create the rest of the sections. This lets the | |
4631 | backend set the right flags. The backend will normally create | |
4632 | the .got and .plt sections. */ | |
4633 | bed = get_elf_backend_data (abfd); | |
4634 | return (*bed->elf_backend_create_dynamic_sections) (abfd, info); | |
4635 | } | |
4636 | ||
4637 | /* Add an entry to the .dynamic table. */ | |
4638 | ||
4639 | boolean | |
4640 | elf_add_dynamic_entry (info, tag, val) | |
4641 | struct bfd_link_info *info; | |
4642 | bfd_vma tag; | |
4643 | bfd_vma val; | |
4644 | { | |
4645 | Elf_Internal_Dyn dyn; | |
4646 | bfd *dynobj; | |
4647 | asection *s; | |
4648 | size_t newsize; | |
4649 | bfd_byte *newcontents; | |
4650 | ||
4651 | dynobj = elf_hash_table (info)->dynobj; | |
4652 | ||
4653 | s = bfd_get_section_by_name (dynobj, ".dynamic"); | |
4654 | BFD_ASSERT (s != NULL); | |
4655 | ||
4656 | newsize = s->_raw_size + sizeof (Elf_External_Dyn); | |
4657 | if (s->contents == NULL) | |
4658 | newcontents = (bfd_byte *) malloc (newsize); | |
4659 | else | |
4660 | newcontents = (bfd_byte *) realloc (s->contents, newsize); | |
4661 | if (newcontents == NULL) | |
4662 | { | |
4663 | bfd_set_error (bfd_error_no_memory); | |
4664 | return false; | |
4665 | } | |
4666 | ||
4667 | dyn.d_tag = tag; | |
4668 | dyn.d_un.d_val = val; | |
4669 | elf_swap_dyn_out (dynobj, &dyn, | |
4670 | (Elf_External_Dyn *) (newcontents + s->_raw_size)); | |
4671 | ||
4672 | s->_raw_size = newsize; | |
4673 | s->contents = newcontents; | |
4674 | ||
4675 | return true; | |
4676 | } | |
4677 | ||
4678 | /* Record an assignment to a symbol made by a linker script. We need | |
4679 | this in case some dynamic object refers to this symbol. */ | |
4680 | ||
4681 | /*ARGSUSED*/ | |
4682 | boolean | |
4683 | NAME(bfd_elf,record_link_assignment) (output_bfd, info, name) | |
4684 | bfd *output_bfd; | |
4685 | struct bfd_link_info *info; | |
4686 | const char *name; | |
4687 | { | |
4688 | struct elf_link_hash_entry *h; | |
4689 | ||
4690 | /* This is called after we have examined all the input objects. If | |
4691 | the symbol does not exist, it merely means that no object refers | |
4692 | to it, and we can just ignore it at this point. */ | |
4693 | h = elf_link_hash_lookup (elf_hash_table (info), name, | |
4694 | false, false, false); | |
4695 | if (h == NULL) | |
4696 | return true; | |
4697 | ||
4698 | h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR; | |
4699 | ||
4700 | if ((h->elf_link_hash_flags & (ELF_LINK_HASH_DEF_DYNAMIC | |
4701 | | ELF_LINK_HASH_REF_DYNAMIC)) != 0 | |
4702 | && h->dynindx == -1) | |
4703 | { | |
4704 | if (! elf_link_record_dynamic_symbol (info, h)) | |
4705 | return false; | |
4706 | ||
4707 | /* If this is a weak defined symbol, and we know a corresponding | |
4708 | real symbol from the same dynamic object, make sure the real | |
4709 | symbol is also made into a dynamic symbol. */ | |
4710 | if (h->weakdef != NULL | |
4711 | && h->weakdef->dynindx == -1) | |
4712 | { | |
4713 | if (! elf_link_record_dynamic_symbol (info, h->weakdef)) | |
4714 | return false; | |
4715 | } | |
4716 | } | |
4717 | ||
4718 | return true; | |
4719 | } | |
4720 | ||
4721 | /* Array used to determine the number of hash table buckets to use | |
4722 | based on the number of symbols there are. If there are fewer than | |
4723 | 3 symbols we use 1 bucket, fewer than 17 symbols we use 3 buckets, | |
4724 | fewer than 37 we use 17 buckets, and so forth. We never use more | |
4725 | than 521 buckets. */ | |
4726 | ||
4727 | static const size_t elf_buckets[] = | |
4728 | { | |
4729 | 1, 3, 17, 37, 67, 97, 131, 197, 263, 521, 0 | |
4730 | }; | |
4731 | ||
4732 | /* Set up the sizes and contents of the ELF dynamic sections. This is | |
4733 | called by the ELF linker emulation before_allocation routine. We | |
4734 | must set the sizes of the sections before the linker sets the | |
4735 | addresses of the various sections. */ | |
4736 | ||
4737 | boolean | |
7c726b66 | 4738 | NAME(bfd_elf,size_dynamic_sections) (output_bfd, info, sinterpptr) |
013dec1a ILT |
4739 | bfd *output_bfd; |
4740 | struct bfd_link_info *info; | |
7c726b66 | 4741 | asection **sinterpptr; |
013dec1a ILT |
4742 | { |
4743 | bfd *dynobj; | |
4744 | size_t dynsymcount; | |
4745 | asection *s; | |
4746 | Elf_Internal_Sym isym; | |
4747 | size_t i; | |
4748 | size_t bucketcount; | |
4749 | struct elf_backend_data *bed; | |
4750 | ||
7c726b66 ILT |
4751 | *sinterpptr = NULL; |
4752 | ||
013dec1a ILT |
4753 | dynobj = elf_hash_table (info)->dynobj; |
4754 | dynsymcount = elf_hash_table (info)->dynsymcount; | |
4755 | ||
4756 | /* If there were no dynamic objects in the link, there is nothing to | |
4757 | do here. */ | |
4758 | if (dynobj == NULL) | |
4759 | return true; | |
4760 | ||
7c726b66 ILT |
4761 | *sinterpptr = bfd_get_section_by_name (dynobj, ".interp"); |
4762 | BFD_ASSERT (*sinterpptr != NULL); | |
4763 | ||
013dec1a ILT |
4764 | /* Set the size of the .dynsym and .hash sections. We counted the |
4765 | number of dynamic symbols in elf_link_add_object_symbols. We | |
4766 | will build the contents of .dynsym and .hash when we build the | |
4767 | final symbol table, because until then we do not know the correct | |
4768 | value to give the symbols. We built the .dynstr section as we | |
4769 | went along in elf_link_add_object_symbols. */ | |
4770 | s = bfd_get_section_by_name (dynobj, ".dynsym"); | |
4771 | BFD_ASSERT (s != NULL); | |
4772 | s->_raw_size = dynsymcount * sizeof (Elf_External_Sym); | |
4773 | s->contents = (bfd_byte *) bfd_alloc (output_bfd, s->_raw_size); | |
4774 | if (s->contents == NULL && s->_raw_size != 0) | |
4775 | { | |
4776 | bfd_set_error (bfd_error_no_memory); | |
4777 | return false; | |
4778 | } | |
4779 | ||
4780 | /* The first entry in .dynsym is a dummy symbol. */ | |
4781 | isym.st_value = 0; | |
4782 | isym.st_size = 0; | |
4783 | isym.st_name = 0; | |
4784 | isym.st_info = 0; | |
4785 | isym.st_other = 0; | |
4786 | isym.st_shndx = 0; | |
4787 | elf_swap_symbol_out (output_bfd, &isym, | |
4788 | (Elf_External_Sym *) s->contents); | |
4789 | ||
4790 | for (i = 0; elf_buckets[i] != 0; i++) | |
4791 | { | |
4792 | bucketcount = elf_buckets[i]; | |
4793 | if (dynsymcount < elf_buckets[i + 1]) | |
4794 | break; | |
4795 | } | |
4796 | ||
4797 | s = bfd_get_section_by_name (dynobj, ".hash"); | |
4798 | BFD_ASSERT (s != NULL); | |
4799 | s->_raw_size = (2 + bucketcount + dynsymcount) * (ARCH_SIZE / 8); | |
4800 | s->contents = (bfd_byte *) bfd_alloc (output_bfd, s->_raw_size); | |
4801 | if (s->contents == NULL) | |
4802 | { | |
4803 | bfd_set_error (bfd_error_no_memory); | |
4804 | return false; | |
4805 | } | |
4806 | memset (s->contents, 0, s->_raw_size); | |
4807 | ||
4808 | put_word (output_bfd, bucketcount, s->contents); | |
4809 | put_word (output_bfd, dynsymcount, s->contents + (ARCH_SIZE / 8)); | |
4810 | ||
4811 | elf_hash_table (info)->bucketcount = bucketcount; | |
4812 | ||
4813 | s = bfd_get_section_by_name (dynobj, ".dynstr"); | |
4814 | BFD_ASSERT (s != NULL); | |
4815 | s->_raw_size = elf_hash_table (info)->dynstr->length; | |
4816 | s->contents = (unsigned char *) elf_hash_table (info)->dynstr->tab; | |
4817 | ||
4818 | /* Find all symbols which were defined in a dynamic object and make | |
4819 | the backend pick a reasonable value for them. */ | |
4820 | elf_link_hash_traverse (elf_hash_table (info), | |
4821 | elf_adjust_dynamic_symbol, | |
4822 | (PTR) info); | |
4823 | ||
4824 | /* Add some entries to the .dynamic section. We fill in some of the | |
4825 | values later, in elf_bfd_final_link, but we must add the entries | |
4826 | now so that we know the final size of the .dynamic section. */ | |
4827 | if (bfd_get_section_by_name (output_bfd, ".init") != NULL) | |
4828 | { | |
4829 | if (! elf_add_dynamic_entry (info, DT_INIT, 0)) | |
4830 | return false; | |
4831 | } | |
4832 | if (bfd_get_section_by_name (output_bfd, ".fini") != NULL) | |
4833 | { | |
4834 | if (! elf_add_dynamic_entry (info, DT_FINI, 0)) | |
4835 | return false; | |
4836 | } | |
4837 | if (! elf_add_dynamic_entry (info, DT_HASH, 0) | |
4838 | || ! elf_add_dynamic_entry (info, DT_STRTAB, 0) | |
4839 | || ! elf_add_dynamic_entry (info, DT_SYMTAB, 0) | |
4840 | || ! elf_add_dynamic_entry (info, DT_STRSZ, | |
4841 | elf_hash_table (info)->dynstr->length) | |
4842 | || ! elf_add_dynamic_entry (info, DT_SYMENT, | |
4843 | sizeof (Elf_External_Sym))) | |
4844 | return false; | |
4845 | ||
4846 | /* The backend must work out the sizes of all the other dynamic | |
4847 | sections. */ | |
4848 | bed = get_elf_backend_data (output_bfd); | |
4849 | if (! (*bed->elf_backend_size_dynamic_sections) (output_bfd, info)) | |
4850 | return false; | |
4851 | ||
4852 | return elf_add_dynamic_entry (info, DT_NULL, 0); | |
4853 | } | |
4854 | ||
4855 | /* Make the backend pick a good value for a dynamic symbol. This is | |
4856 | called via elf_link_hash_traverse, and also calls itself | |
4857 | recursively. */ | |
4858 | ||
4859 | static boolean | |
4860 | elf_adjust_dynamic_symbol (h, data) | |
4861 | struct elf_link_hash_entry *h; | |
4862 | PTR data; | |
4863 | { | |
4864 | struct bfd_link_info *info = (struct bfd_link_info *) data; | |
4865 | bfd *dynobj; | |
4866 | struct elf_backend_data *bed; | |
4867 | ||
4868 | /* If this symbol is not defined by a dynamic object, or is not | |
4869 | referenced by a regular object, ignore it. FIXME: Do we need to | |
4870 | worry about symbols which are defined by one dynamic object and | |
4871 | referenced by another one? */ | |
4872 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0 | |
4873 | || (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0 | |
4874 | || (h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) == 0) | |
4875 | return true; | |
4876 | ||
4877 | /* If we've already adjusted this symbol, don't do it again. This | |
4878 | can happen via a recursive call. */ | |
4879 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DYNAMIC_ADJUSTED) != 0) | |
4880 | return true; | |
4881 | ||
4882 | /* Don't look at this symbol again. Note that we must set this | |
4883 | after checking the above conditions, because we may look at a | |
4884 | symbol once, decide not to do anything, and then get called | |
4885 | recursively later after REF_REGULAR is set below. */ | |
4886 | h->elf_link_hash_flags |= ELF_LINK_HASH_DYNAMIC_ADJUSTED; | |
4887 | ||
4888 | /* If this is a weak definition, and we know a real definition, and | |
4889 | the real symbol is not itself defined by a regular object file, | |
4890 | then get a good value for the real definition. We handle the | |
4891 | real symbol first, for the convenience of the backend routine. | |
4892 | ||
4893 | Note that there is a confusing case here. If the real definition | |
4894 | is defined by a regular object file, we don't get the real symbol | |
4895 | from the dynamic object, but we do get the weak symbol. If the | |
4896 | processor backend uses a COPY reloc, then if some routine in the | |
4897 | dynamic object changes the real symbol, we will not see that | |
4898 | change in the corresponding weak symbol. This is the way other | |
4899 | ELF linkers work as well, and seems to be a result of the shared | |
4900 | library model. | |
4901 | ||
4902 | I will clarify this issue. Most SVR4 shared libraries define the | |
4903 | variable _timezone and define timezone as a weak synonym. The | |
4904 | tzset call changes _timezone. If you write | |
4905 | extern int timezone; | |
4906 | int _timezone = 5; | |
4907 | int main () { tzset (); printf ("%d %d\n", timezone, _timezone); } | |
4908 | you might expect that, since timezone is a synonym for _timezone, | |
4909 | the same number will print both times. However, if the processor | |
4910 | backend uses a COPY reloc, then actually timezone will be copied | |
4911 | into your process image, and, since you define _timezone | |
4912 | yourself, _timezone will not. Thus timezone and _timezone will | |
4913 | wind up at different memory locations. The tzset call will set | |
4914 | _timezone, leaving timezone unchanged. */ | |
4915 | ||
4916 | if (h->weakdef != NULL) | |
4917 | { | |
4918 | struct elf_link_hash_entry *weakdef; | |
4919 | ||
4920 | BFD_ASSERT (h->root.type == bfd_link_hash_defined); | |
4921 | weakdef = h->weakdef; | |
4922 | BFD_ASSERT (weakdef->root.type == bfd_link_hash_defined); | |
4923 | BFD_ASSERT (weakdef->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC); | |
4924 | if ((weakdef->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0 | |
4925 | || (weakdef->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) == 0) | |
4926 | { | |
4927 | /* This symbol is defined or referenced by a regular object | |
4928 | file, so we will not do anything special. Clear weakdef | |
4929 | for the convenience of the processor backend. */ | |
4930 | h->weakdef = NULL; | |
4931 | } | |
4932 | else | |
4933 | { | |
4934 | /* There is an implicit reference by a regular object file | |
4935 | via the weak symbol. */ | |
4936 | weakdef->elf_link_hash_flags |= ELF_LINK_HASH_REF_REGULAR; | |
4937 | if (! elf_adjust_dynamic_symbol (weakdef, (PTR) info)) | |
4938 | return false; | |
4939 | } | |
4940 | } | |
4941 | ||
4942 | dynobj = elf_hash_table (info)->dynobj; | |
4943 | bed = get_elf_backend_data (dynobj); | |
4944 | if (! (*bed->elf_backend_adjust_dynamic_symbol) (info, h)) | |
4945 | { | |
4946 | /* FIXME: No way to return error. */ | |
4947 | abort (); | |
4948 | } | |
4949 | ||
4950 | return true; | |
4951 | } | |
6ec3bb6a ILT |
4952 | \f |
4953 | /* Final phase of ELF linker. */ | |
4954 | ||
4955 | /* A structure we use to avoid passing large numbers of arguments. */ | |
4956 | ||
4957 | struct elf_final_link_info | |
4958 | { | |
4959 | /* General link information. */ | |
4960 | struct bfd_link_info *info; | |
4961 | /* Output BFD. */ | |
4962 | bfd *output_bfd; | |
4963 | /* Symbol string table. */ | |
4964 | struct strtab *symstrtab; | |
013dec1a ILT |
4965 | /* .dynsym section. */ |
4966 | asection *dynsym_sec; | |
4967 | /* .hash section. */ | |
4968 | asection *hash_sec; | |
6ec3bb6a ILT |
4969 | /* Buffer large enough to hold contents of any section. */ |
4970 | bfd_byte *contents; | |
4971 | /* Buffer large enough to hold external relocs of any section. */ | |
4972 | PTR external_relocs; | |
4973 | /* Buffer large enough to hold internal relocs of any section. */ | |
4974 | Elf_Internal_Rela *internal_relocs; | |
4975 | /* Buffer large enough to hold external local symbols of any input | |
4976 | BFD. */ | |
4977 | Elf_External_Sym *external_syms; | |
4978 | /* Buffer large enough to hold internal local symbols of any input | |
4979 | BFD. */ | |
4980 | Elf_Internal_Sym *internal_syms; | |
4981 | /* Array large enough to hold a symbol index for each local symbol | |
4982 | of any input BFD. */ | |
4983 | long *indices; | |
4984 | /* Array large enough to hold a section pointer for each local | |
4985 | symbol of any input BFD. */ | |
4986 | asection **sections; | |
4987 | /* Buffer to hold swapped out symbols. */ | |
4988 | Elf_External_Sym *symbuf; | |
4989 | /* Number of swapped out symbols in buffer. */ | |
4990 | size_t symbuf_count; | |
4991 | /* Number of symbols which fit in symbuf. */ | |
4992 | size_t symbuf_size; | |
4993 | }; | |
4994 | ||
4995 | static boolean elf_link_output_sym | |
4996 | PARAMS ((struct elf_final_link_info *, const char *, Elf_Internal_Sym *)); | |
4997 | static boolean elf_link_flush_output_syms | |
4998 | PARAMS ((struct elf_final_link_info *)); | |
4999 | static boolean elf_link_output_extsym | |
5000 | PARAMS ((struct elf_link_hash_entry *, PTR)); | |
5001 | static boolean elf_link_input_bfd | |
5002 | PARAMS ((struct elf_final_link_info *, bfd *)); | |
5003 | static boolean elf_reloc_link_order | |
5004 | PARAMS ((bfd *, struct bfd_link_info *, asection *, | |
5005 | struct bfd_link_order *)); | |
5006 | ||
5007 | /* Do the final step of an ELF link. */ | |
5008 | ||
5009 | boolean | |
5010 | elf_bfd_final_link (abfd, info) | |
5011 | bfd *abfd; | |
5012 | struct bfd_link_info *info; | |
5013 | { | |
013dec1a | 5014 | bfd *dynobj; |
6ec3bb6a ILT |
5015 | struct elf_final_link_info finfo; |
5016 | register asection *o; | |
5017 | register struct bfd_link_order *p; | |
5018 | register bfd *sub; | |
5019 | size_t max_contents_size; | |
5020 | size_t max_external_reloc_size; | |
5021 | size_t max_internal_reloc_count; | |
5022 | size_t max_sym_count; | |
5023 | file_ptr off; | |
5024 | Elf_Internal_Sym elfsym; | |
013dec1a | 5025 | unsigned int i; |
6ec3bb6a ILT |
5026 | Elf_Internal_Shdr *symtab_hdr; |
5027 | Elf_Internal_Shdr *symstrtab_hdr; | |
5028 | ||
013dec1a ILT |
5029 | dynobj = elf_hash_table (info)->dynobj; |
5030 | ||
6ec3bb6a ILT |
5031 | finfo.info = info; |
5032 | finfo.output_bfd = abfd; | |
5033 | finfo.symstrtab = bfd_new_strtab (abfd); | |
5034 | if (finfo.symstrtab == NULL) | |
5035 | return false; | |
013dec1a ILT |
5036 | if (dynobj == NULL) |
5037 | { | |
5038 | finfo.dynsym_sec = NULL; | |
5039 | finfo.hash_sec = NULL; | |
5040 | } | |
5041 | else | |
5042 | { | |
5043 | finfo.dynsym_sec = bfd_get_section_by_name (dynobj, ".dynsym"); | |
5044 | finfo.hash_sec = bfd_get_section_by_name (dynobj, ".hash"); | |
5045 | if (finfo.dynsym_sec == NULL | |
5046 | || finfo.hash_sec == NULL) | |
5047 | abort (); | |
5048 | } | |
6ec3bb6a ILT |
5049 | finfo.contents = NULL; |
5050 | finfo.external_relocs = NULL; | |
5051 | finfo.internal_relocs = NULL; | |
5052 | finfo.external_syms = NULL; | |
5053 | finfo.internal_syms = NULL; | |
5054 | finfo.indices = NULL; | |
5055 | finfo.sections = NULL; | |
5056 | finfo.symbuf = NULL; | |
5057 | finfo.symbuf_count = 0; | |
5058 | ||
5059 | /* Count up the number of relocations we will output for each output | |
5060 | section, so that we know the sizes of the reloc sections. We | |
5061 | also figure out some maximum sizes. */ | |
5062 | max_contents_size = 0; | |
5063 | max_external_reloc_size = 0; | |
5064 | max_internal_reloc_count = 0; | |
5065 | max_sym_count = 0; | |
5066 | for (o = abfd->sections; o != (asection *) NULL; o = o->next) | |
5067 | { | |
5068 | o->reloc_count = 0; | |
5069 | ||
5070 | for (p = o->link_order_head; p != NULL; p = p->next) | |
5071 | { | |
5072 | if (p->type == bfd_section_reloc_link_order | |
5073 | || p->type == bfd_symbol_reloc_link_order) | |
5074 | ++o->reloc_count; | |
5075 | else if (p->type == bfd_indirect_link_order) | |
5076 | { | |
5077 | asection *sec; | |
5078 | ||
5079 | sec = p->u.indirect.section; | |
5080 | ||
5081 | if (info->relocateable) | |
5082 | o->reloc_count += sec->reloc_count; | |
5083 | ||
5084 | if (sec->_raw_size > max_contents_size) | |
5085 | max_contents_size = sec->_raw_size; | |
5086 | if (sec->_cooked_size > max_contents_size) | |
5087 | max_contents_size = sec->_cooked_size; | |
5088 | ||
5089 | /* We are interested in just local symbols, not all | |
5090 | symbols. */ | |
5315c428 ILT |
5091 | if (bfd_get_flavour (sec->owner) == bfd_target_elf_flavour) |
5092 | { | |
5093 | size_t sym_count; | |
5094 | ||
5095 | if (elf_bad_symtab (sec->owner)) | |
5096 | sym_count = (elf_tdata (sec->owner)->symtab_hdr.sh_size | |
5097 | / sizeof (Elf_External_Sym)); | |
5098 | else | |
5099 | sym_count = elf_tdata (sec->owner)->symtab_hdr.sh_info; | |
5100 | ||
5101 | if (sym_count > max_sym_count) | |
5102 | max_sym_count = sym_count; | |
5103 | } | |
6ec3bb6a ILT |
5104 | |
5105 | if ((sec->flags & SEC_RELOC) != 0) | |
5106 | { | |
5107 | size_t ext_size; | |
5108 | ||
5109 | ext_size = elf_section_data (sec)->rel_hdr.sh_size; | |
5110 | if (ext_size > max_external_reloc_size) | |
5111 | max_external_reloc_size = ext_size; | |
5112 | if (sec->reloc_count > max_internal_reloc_count) | |
5113 | max_internal_reloc_count = sec->reloc_count; | |
5114 | } | |
5115 | } | |
5116 | } | |
5117 | ||
5118 | if (o->reloc_count > 0) | |
5119 | o->flags |= SEC_RELOC; | |
5120 | else | |
5121 | { | |
5122 | /* Explicitly clear the SEC_RELOC flag. The linker tends to | |
5123 | set it (this is probably a bug) and if it is set | |
5124 | assign_section_numbers will create a reloc section. */ | |
5125 | o->flags &=~ SEC_RELOC; | |
5126 | } | |
5127 | } | |
5128 | ||
5129 | /* Figure out the file positions for everything but the symbol table | |
5130 | and the relocs. We set symcount to force assign_section_numbers | |
5131 | to create a symbol table. */ | |
5132 | abfd->symcount = info->strip == strip_all ? 0 : 1; | |
5133 | BFD_ASSERT (! abfd->output_has_begun); | |
5134 | if (! elf_compute_section_file_positions (abfd, info)) | |
5135 | goto error_return; | |
5136 | ||
5137 | /* That created the reloc sections. Set their sizes, and assign | |
5138 | them file positions, and allocate some buffers. */ | |
5139 | for (o = abfd->sections; o != NULL; o = o->next) | |
5140 | { | |
5141 | if ((o->flags & SEC_RELOC) != 0) | |
5142 | { | |
5143 | Elf_Internal_Shdr *rel_hdr; | |
5144 | register struct elf_link_hash_entry **p, **pend; | |
5145 | ||
5146 | rel_hdr = &elf_section_data (o)->rel_hdr; | |
5147 | ||
5148 | rel_hdr->sh_size = rel_hdr->sh_entsize * o->reloc_count; | |
5149 | ||
5150 | /* The contents field must last into write_object_contents, | |
5151 | so we allocate it with bfd_alloc rather than malloc. */ | |
5152 | rel_hdr->contents = (PTR) bfd_alloc (abfd, rel_hdr->sh_size); | |
5153 | if (rel_hdr->contents == NULL && rel_hdr->sh_size != 0) | |
5154 | { | |
5155 | bfd_set_error (bfd_error_no_memory); | |
5156 | goto error_return; | |
5157 | } | |
5158 | ||
5159 | p = ((struct elf_link_hash_entry **) | |
5160 | malloc (o->reloc_count | |
5161 | * sizeof (struct elf_link_hash_entry *))); | |
5162 | if (p == NULL && o->reloc_count != 0) | |
5163 | { | |
5164 | bfd_set_error (bfd_error_no_memory); | |
5165 | goto error_return; | |
5166 | } | |
5167 | elf_section_data (o)->rel_hashes = p; | |
5168 | pend = p + o->reloc_count; | |
5169 | for (; p < pend; p++) | |
5170 | *p = NULL; | |
5171 | ||
5172 | /* Use the reloc_count field as an index when outputting the | |
5173 | relocs. */ | |
5174 | o->reloc_count = 0; | |
5175 | } | |
5176 | } | |
5177 | ||
5178 | assign_file_positions_for_relocs (abfd); | |
5179 | ||
5180 | /* We have now assigned file positions for all the sections except | |
5181 | .symtab and .strtab. We start the .symtab section at the current | |
5182 | file position, and write directly to it. We build the .strtab | |
5183 | section in memory. When we add .dynsym support, we will build | |
5184 | that in memory as well (.dynsym is smaller than .symtab). */ | |
5185 | abfd->symcount = 0; | |
5186 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
5187 | /* sh_name is set in prep_headers. */ | |
5188 | symtab_hdr->sh_type = SHT_SYMTAB; | |
5189 | symtab_hdr->sh_flags = 0; | |
5190 | symtab_hdr->sh_addr = 0; | |
5191 | symtab_hdr->sh_size = 0; | |
5192 | symtab_hdr->sh_entsize = sizeof (Elf_External_Sym); | |
5193 | /* sh_link is set in assign_section_numbers. */ | |
5194 | /* sh_info is set below. */ | |
5195 | /* sh_offset is set just below. */ | |
5196 | symtab_hdr->sh_addralign = 4; /* FIXME: system dependent? */ | |
5197 | ||
5198 | off = elf_tdata (abfd)->next_file_pos; | |
013dec1a | 5199 | off = assign_file_position_for_section (symtab_hdr, off, true); |
6ec3bb6a ILT |
5200 | |
5201 | /* Note that at this point elf_tdata (abfd)->next_file_pos is | |
5202 | incorrect. We do not yet know the size of the .symtab section. | |
5203 | We correct next_file_pos below, after we do know the size. */ | |
5204 | ||
5205 | /* Allocate a buffer to hold swapped out symbols. This is to avoid | |
5206 | continuously seeking to the right position in the file. */ | |
5207 | if (! info->keep_memory || max_sym_count < 20) | |
5208 | finfo.symbuf_size = 20; | |
5209 | else | |
5210 | finfo.symbuf_size = max_sym_count; | |
5211 | finfo.symbuf = ((Elf_External_Sym *) | |
5212 | malloc (finfo.symbuf_size * sizeof (Elf_External_Sym))); | |
5213 | if (finfo.symbuf == NULL) | |
5214 | { | |
5215 | bfd_set_error (bfd_error_no_memory); | |
5216 | goto error_return; | |
5217 | } | |
5218 | ||
5219 | /* Start writing out the symbol table. The first symbol is always a | |
5220 | dummy symbol. */ | |
5221 | elfsym.st_value = 0; | |
5222 | elfsym.st_size = 0; | |
5223 | elfsym.st_info = 0; | |
5224 | elfsym.st_other = 0; | |
5225 | elfsym.st_shndx = SHN_UNDEF; | |
5226 | if (! elf_link_output_sym (&finfo, (const char *) NULL, &elfsym)) | |
5227 | goto error_return; | |
5228 | ||
5229 | #if 0 | |
5230 | /* Some standard ELF linkers do this, but we don't because it causes | |
5231 | bootstrap comparison failures. */ | |
5232 | /* Output a file symbol for the output file as the second symbol. | |
5233 | We output this even if we are discarding local symbols, although | |
5234 | I'm not sure if this is correct. */ | |
5235 | elfsym.st_value = 0; | |
5236 | elfsym.st_size = 0; | |
5237 | elfsym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE); | |
5238 | elfsym.st_other = 0; | |
5239 | elfsym.st_shndx = SHN_ABS; | |
5240 | if (! elf_link_output_sym (&finfo, bfd_get_filename (abfd), &elfsym)) | |
5241 | goto error_return; | |
5242 | #endif | |
5243 | ||
5244 | /* Output a symbol for each section. We output these even if we are | |
5245 | discarding local symbols, since they are used for relocs. These | |
5246 | symbols have no names. We store the index of each one in the | |
5247 | index field of the section, so that we can find it again when | |
5248 | outputting relocs. */ | |
5249 | elfsym.st_value = 0; | |
5250 | elfsym.st_size = 0; | |
5251 | elfsym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION); | |
5252 | elfsym.st_other = 0; | |
013dec1a | 5253 | for (i = 1; i < elf_elfheader (abfd)->e_shnum; i++) |
6ec3bb6a | 5254 | { |
013dec1a ILT |
5255 | o = section_from_elf_index (abfd, i); |
5256 | if (o != &bfd_abs_section) | |
5257 | o->target_index = abfd->symcount; | |
5258 | elfsym.st_shndx = i; | |
6ec3bb6a ILT |
5259 | if (! elf_link_output_sym (&finfo, (const char *) NULL, &elfsym)) |
5260 | goto error_return; | |
5261 | } | |
5262 | ||
5263 | /* Allocate some memory to hold information read in from the input | |
5264 | files. */ | |
5265 | finfo.contents = (bfd_byte *) malloc (max_contents_size); | |
5266 | finfo.external_relocs = (PTR) malloc (max_external_reloc_size); | |
5267 | finfo.internal_relocs = ((Elf_Internal_Rela *) | |
5268 | malloc (max_internal_reloc_count | |
5269 | * sizeof (Elf_Internal_Rela))); | |
5270 | finfo.external_syms = ((Elf_External_Sym *) | |
5271 | malloc (max_sym_count * sizeof (Elf_External_Sym))); | |
5272 | finfo.internal_syms = ((Elf_Internal_Sym *) | |
5273 | malloc (max_sym_count * sizeof (Elf_Internal_Sym))); | |
5274 | finfo.indices = (long *) malloc (max_sym_count * sizeof (long)); | |
5275 | finfo.sections = (asection **) malloc (max_sym_count * sizeof (asection *)); | |
5276 | if ((finfo.contents == NULL && max_contents_size != 0) | |
5277 | || (finfo.external_relocs == NULL && max_external_reloc_size != 0) | |
5278 | || (finfo.internal_relocs == NULL && max_internal_reloc_count != 0) | |
5279 | || (finfo.external_syms == NULL && max_sym_count != 0) | |
5280 | || (finfo.internal_syms == NULL && max_sym_count != 0) | |
5281 | || (finfo.indices == NULL && max_sym_count != 0) | |
5282 | || (finfo.sections == NULL && max_sym_count != 0)) | |
5283 | { | |
5284 | bfd_set_error (bfd_error_no_memory); | |
5285 | goto error_return; | |
5286 | } | |
5287 | ||
5288 | /* Since ELF permits relocations to be against local symbols, we | |
5289 | must have the local symbols available when we do the relocations. | |
5290 | Since we would rather only read the local symbols once, and we | |
5291 | would rather not keep them in memory, we handle all the | |
5292 | relocations for a single input file at the same time. | |
5293 | ||
5294 | Unfortunately, there is no way to know the total number of local | |
5295 | symbols until we have seen all of them, and the local symbol | |
5296 | indices precede the global symbol indices. This means that when | |
5297 | we are generating relocateable output, and we see a reloc against | |
5298 | a global symbol, we can not know the symbol index until we have | |
5299 | finished examining all the local symbols to see which ones we are | |
5300 | going to output. To deal with this, we keep the relocations in | |
5301 | memory, and don't output them until the end of the link. This is | |
5302 | an unfortunate waste of memory, but I don't see a good way around | |
5303 | it. Fortunately, it only happens when performing a relocateable | |
5304 | link, which is not the common case. FIXME: If keep_memory is set | |
5305 | we could write the relocs out and then read them again; I don't | |
5306 | know how bad the memory loss will be. */ | |
5307 | ||
5308 | for (sub = info->input_bfds; sub != NULL; sub = sub->next) | |
5309 | sub->output_has_begun = false; | |
5310 | for (o = abfd->sections; o != NULL; o = o->next) | |
5311 | { | |
5312 | for (p = o->link_order_head; p != NULL; p = p->next) | |
5313 | { | |
5314 | if (p->type == bfd_indirect_link_order | |
5315 | && (bfd_get_flavour (p->u.indirect.section->owner) | |
5316 | == bfd_target_elf_flavour)) | |
5317 | { | |
5318 | sub = p->u.indirect.section->owner; | |
5319 | if (! sub->output_has_begun) | |
5320 | { | |
5321 | if (! elf_link_input_bfd (&finfo, sub)) | |
5322 | goto error_return; | |
5323 | sub->output_has_begun = true; | |
5324 | } | |
5325 | } | |
5326 | else if (p->type == bfd_section_reloc_link_order | |
5327 | || p->type == bfd_symbol_reloc_link_order) | |
5328 | { | |
5329 | if (! elf_reloc_link_order (abfd, info, o, p)) | |
5330 | goto error_return; | |
5331 | } | |
5332 | else | |
5333 | { | |
5334 | if (! _bfd_default_link_order (abfd, info, o, p)) | |
5335 | goto error_return; | |
5336 | } | |
5337 | } | |
5338 | } | |
5339 | ||
5340 | /* That wrote out all the local symbols. Finish up the symbol table | |
5341 | with the global symbols. */ | |
5342 | ||
5343 | /* The sh_info field records the index of the first non local | |
5344 | symbol. */ | |
5345 | symtab_hdr->sh_info = abfd->symcount; | |
013dec1a ILT |
5346 | if (dynobj != NULL) |
5347 | elf_section_data (finfo.dynsym_sec->output_section)->this_hdr.sh_info = 1; | |
6ec3bb6a ILT |
5348 | |
5349 | /* We get the global symbols from the hash table. */ | |
013dec1a ILT |
5350 | elf_link_hash_traverse (elf_hash_table (info), elf_link_output_extsym, |
5351 | (PTR) &finfo); | |
6ec3bb6a ILT |
5352 | |
5353 | /* Flush all symbols to the file. */ | |
5354 | if (! elf_link_flush_output_syms (&finfo)) | |
5355 | return false; | |
5356 | ||
5357 | /* Now we know the size of the symtab section. */ | |
5358 | off += symtab_hdr->sh_size; | |
5359 | ||
5360 | /* Finish up the symbol string table (.strtab) section. */ | |
5361 | symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr; | |
5362 | /* sh_name was set in prep_headers. */ | |
5363 | symstrtab_hdr->sh_type = SHT_STRTAB; | |
5364 | symstrtab_hdr->sh_flags = 0; | |
5365 | symstrtab_hdr->sh_addr = 0; | |
5366 | symstrtab_hdr->sh_size = finfo.symstrtab->length; | |
5367 | symstrtab_hdr->sh_entsize = 0; | |
5368 | symstrtab_hdr->sh_link = 0; | |
5369 | symstrtab_hdr->sh_info = 0; | |
5370 | /* sh_offset is set just below. */ | |
5371 | symstrtab_hdr->sh_addralign = 1; | |
5372 | symstrtab_hdr->contents = (PTR) finfo.symstrtab->tab; | |
5373 | ||
013dec1a | 5374 | off = assign_file_position_for_section (symstrtab_hdr, off, true); |
6ec3bb6a ILT |
5375 | elf_tdata (abfd)->next_file_pos = off; |
5376 | ||
5377 | /* Adjust the relocs to have the correct symbol indices. */ | |
5378 | for (o = abfd->sections; o != NULL; o = o->next) | |
5379 | { | |
5380 | struct elf_link_hash_entry **rel_hash; | |
5381 | Elf_Internal_Shdr *rel_hdr; | |
6ec3bb6a ILT |
5382 | |
5383 | if ((o->flags & SEC_RELOC) == 0) | |
5384 | continue; | |
5385 | ||
5386 | rel_hash = elf_section_data (o)->rel_hashes; | |
5387 | rel_hdr = &elf_section_data (o)->rel_hdr; | |
5388 | for (i = 0; i < o->reloc_count; i++, rel_hash++) | |
5389 | { | |
5390 | if (*rel_hash == NULL) | |
5391 | continue; | |
5392 | ||
5393 | BFD_ASSERT ((*rel_hash)->indx >= 0); | |
5394 | ||
5395 | if (rel_hdr->sh_entsize == sizeof (Elf_External_Rel)) | |
5396 | { | |
5397 | Elf_External_Rel *erel; | |
5398 | Elf_Internal_Rel irel; | |
5399 | ||
5400 | erel = (Elf_External_Rel *) rel_hdr->contents + i; | |
5401 | elf_swap_reloc_in (abfd, erel, &irel); | |
5402 | irel.r_info = ELF_R_INFO ((*rel_hash)->indx, | |
5403 | ELF_R_TYPE (irel.r_info)); | |
5404 | elf_swap_reloc_out (abfd, &irel, erel); | |
5405 | } | |
5406 | else | |
5407 | { | |
5408 | Elf_External_Rela *erela; | |
5409 | Elf_Internal_Rela irela; | |
5410 | ||
5411 | BFD_ASSERT (rel_hdr->sh_entsize | |
5412 | == sizeof (Elf_External_Rela)); | |
5413 | ||
5414 | erela = (Elf_External_Rela *) rel_hdr->contents + i; | |
5415 | elf_swap_reloca_in (abfd, erela, &irela); | |
5416 | irela.r_info = ELF_R_INFO ((*rel_hash)->indx, | |
5417 | ELF_R_TYPE (irela.r_info)); | |
5418 | elf_swap_reloca_out (abfd, &irela, erela); | |
5419 | } | |
5420 | } | |
5421 | ||
5422 | /* Set the reloc_count field to 0 to prevent write_relocs from | |
5423 | trying to swap the relocs out itself. */ | |
5424 | o->reloc_count = 0; | |
5425 | } | |
5426 | ||
013dec1a ILT |
5427 | /* If we are linking against a dynamic object, finish up the dynamic |
5428 | linking information. */ | |
5429 | if (dynobj != NULL) | |
5430 | { | |
5431 | Elf_External_Dyn *dyncon, *dynconend; | |
5432 | struct elf_backend_data *bed; | |
5433 | ||
5434 | /* Fix up .dynamic entries. */ | |
5435 | o = bfd_get_section_by_name (dynobj, ".dynamic"); | |
5436 | BFD_ASSERT (o != NULL); | |
5437 | ||
5438 | dyncon = (Elf_External_Dyn *) o->contents; | |
5439 | dynconend = (Elf_External_Dyn *) (o->contents + o->_raw_size); | |
5440 | for (; dyncon < dynconend; dyncon++) | |
5441 | { | |
5442 | Elf_Internal_Dyn dyn; | |
5443 | const char *name; | |
5444 | unsigned int type; | |
5445 | ||
5446 | elf_swap_dyn_in (dynobj, dyncon, &dyn); | |
5447 | ||
5448 | switch (dyn.d_tag) | |
5449 | { | |
5450 | default: | |
5451 | break; | |
5452 | ||
5453 | case DT_INIT: | |
5454 | name = ".init"; | |
5455 | goto get_vma; | |
5456 | case DT_FINI: | |
5457 | name = ".fini"; | |
5458 | goto get_vma; | |
5459 | case DT_HASH: | |
5460 | name = ".hash"; | |
5461 | goto get_vma; | |
5462 | case DT_STRTAB: | |
5463 | name = ".dynstr"; | |
5464 | goto get_vma; | |
5465 | case DT_SYMTAB: | |
5466 | name = ".dynsym"; | |
5467 | get_vma: | |
5468 | o = bfd_get_section_by_name (abfd, name); | |
5469 | BFD_ASSERT (o != NULL); | |
5470 | dyn.d_un.d_ptr = o->vma; | |
5471 | elf_swap_dyn_out (dynobj, &dyn, dyncon); | |
5472 | break; | |
5473 | ||
5474 | case DT_REL: | |
5475 | case DT_RELA: | |
5476 | case DT_RELSZ: | |
5477 | case DT_RELASZ: | |
5478 | if (dyn.d_tag == DT_REL || dyn.d_tag == DT_RELSZ) | |
5479 | type = SHT_REL; | |
5480 | else | |
5481 | type = SHT_RELA; | |
5482 | dyn.d_un.d_val = 0; | |
5483 | for (i = 1; i < elf_elfheader (abfd)->e_shnum; i++) | |
5484 | { | |
5485 | Elf_Internal_Shdr *hdr; | |
5486 | ||
5487 | hdr = elf_elfsections (abfd)[i]; | |
5488 | if (hdr->sh_type == type | |
5489 | && (hdr->sh_flags & SHF_ALLOC) != 0) | |
5490 | { | |
5491 | if (dyn.d_tag == DT_RELSZ || dyn.d_tag == DT_RELASZ) | |
5492 | dyn.d_un.d_val += hdr->sh_size; | |
5493 | else | |
5494 | { | |
5495 | if (dyn.d_un.d_val == 0 | |
5496 | || hdr->sh_addr < dyn.d_un.d_val) | |
5497 | dyn.d_un.d_val = hdr->sh_addr; | |
5498 | } | |
5499 | } | |
5500 | } | |
5501 | elf_swap_dyn_out (dynobj, &dyn, dyncon); | |
5502 | break; | |
5503 | } | |
5504 | } | |
5505 | ||
5506 | bed = get_elf_backend_data (abfd); | |
5507 | if (! (*bed->elf_backend_finish_dynamic_sections) (abfd, info)) | |
5508 | goto error_return; | |
5509 | ||
5510 | for (o = dynobj->sections; o != NULL; o = o->next) | |
5511 | { | |
013dec1a ILT |
5512 | if ((o->flags & SEC_HAS_CONTENTS) == 0) |
5513 | continue; | |
5514 | BFD_ASSERT ((o->flags & SEC_IN_MEMORY) != 0); | |
5515 | if (! bfd_set_section_contents (abfd, o->output_section, | |
5516 | o->contents, o->output_offset, | |
5517 | o->_raw_size)) | |
5518 | goto error_return; | |
013dec1a ILT |
5519 | } |
5520 | } | |
5521 | ||
6ec3bb6a ILT |
5522 | if (finfo.contents != NULL) |
5523 | free (finfo.contents); | |
5524 | if (finfo.external_relocs != NULL) | |
5525 | free (finfo.external_relocs); | |
5526 | if (finfo.internal_relocs != NULL) | |
5527 | free (finfo.internal_relocs); | |
5528 | if (finfo.external_syms != NULL) | |
5529 | free (finfo.external_syms); | |
5530 | if (finfo.internal_syms != NULL) | |
5531 | free (finfo.internal_syms); | |
5532 | if (finfo.indices != NULL) | |
5533 | free (finfo.indices); | |
5534 | if (finfo.sections != NULL) | |
5535 | free (finfo.sections); | |
5536 | if (finfo.symbuf != NULL) | |
5537 | free (finfo.symbuf); | |
5538 | for (o = abfd->sections; o != NULL; o = o->next) | |
5539 | { | |
5540 | if ((o->flags & SEC_RELOC) != 0 | |
5541 | && elf_section_data (o)->rel_hashes != NULL) | |
5542 | free (elf_section_data (o)->rel_hashes); | |
5543 | } | |
5544 | ||
5545 | return true; | |
5546 | ||
5547 | error_return: | |
5548 | if (finfo.contents != NULL) | |
5549 | free (finfo.contents); | |
5550 | if (finfo.external_relocs != NULL) | |
5551 | free (finfo.external_relocs); | |
5552 | if (finfo.internal_relocs != NULL) | |
5553 | free (finfo.internal_relocs); | |
5554 | if (finfo.external_syms != NULL) | |
5555 | free (finfo.external_syms); | |
5556 | if (finfo.internal_syms != NULL) | |
5557 | free (finfo.internal_syms); | |
5558 | if (finfo.indices != NULL) | |
5559 | free (finfo.indices); | |
5560 | if (finfo.sections != NULL) | |
5561 | free (finfo.sections); | |
5562 | if (finfo.symbuf != NULL) | |
5563 | free (finfo.symbuf); | |
5564 | for (o = abfd->sections; o != NULL; o = o->next) | |
5565 | { | |
5566 | if ((o->flags & SEC_RELOC) != 0 | |
5567 | && elf_section_data (o)->rel_hashes != NULL) | |
5568 | free (elf_section_data (o)->rel_hashes); | |
5569 | } | |
5570 | ||
5571 | return false; | |
5572 | } | |
5573 | ||
5574 | /* Add a symbol to the output symbol table. */ | |
5575 | ||
5576 | static boolean | |
5577 | elf_link_output_sym (finfo, name, elfsym) | |
5578 | struct elf_final_link_info *finfo; | |
5579 | const char *name; | |
5580 | Elf_Internal_Sym *elfsym; | |
5581 | { | |
5582 | if (name == (const char *) NULL || *name == '\0') | |
5583 | elfsym->st_name = 0; | |
5584 | else | |
5585 | { | |
5586 | elfsym->st_name = bfd_add_to_strtab (finfo->output_bfd, | |
5587 | finfo->symstrtab, name); | |
5588 | if (elfsym->st_name == (unsigned long) -1) | |
5589 | return false; | |
5590 | } | |
5591 | ||
5592 | if (finfo->symbuf_count >= finfo->symbuf_size) | |
5593 | { | |
5594 | if (! elf_link_flush_output_syms (finfo)) | |
5595 | return false; | |
5596 | } | |
5597 | ||
5598 | elf_swap_symbol_out (finfo->output_bfd, elfsym, | |
5599 | finfo->symbuf + finfo->symbuf_count); | |
5600 | ++finfo->symbuf_count; | |
5601 | ||
5602 | ++finfo->output_bfd->symcount; | |
5603 | ||
5604 | return true; | |
5605 | } | |
5606 | ||
5607 | /* Flush the output symbols to the file. */ | |
5608 | ||
5609 | static boolean | |
5610 | elf_link_flush_output_syms (finfo) | |
5611 | struct elf_final_link_info *finfo; | |
5612 | { | |
5613 | Elf_Internal_Shdr *symtab; | |
5614 | ||
5615 | symtab = &elf_tdata (finfo->output_bfd)->symtab_hdr; | |
5616 | ||
5617 | if (bfd_seek (finfo->output_bfd, symtab->sh_offset + symtab->sh_size, | |
5618 | SEEK_SET) != 0 | |
5619 | || (bfd_write ((PTR) finfo->symbuf, finfo->symbuf_count, | |
5620 | sizeof (Elf_External_Sym), finfo->output_bfd) | |
5621 | != finfo->symbuf_count * sizeof (Elf_External_Sym))) | |
5622 | return false; | |
5623 | ||
5624 | symtab->sh_size += finfo->symbuf_count * sizeof (Elf_External_Sym); | |
5625 | ||
5626 | finfo->symbuf_count = 0; | |
5627 | ||
5628 | return true; | |
5629 | } | |
5630 | ||
5631 | /* Add an external symbol to the symbol table. This is called from | |
5632 | the hash table traversal routine. */ | |
5633 | ||
5634 | static boolean | |
5635 | elf_link_output_extsym (h, data) | |
5636 | struct elf_link_hash_entry *h; | |
5637 | PTR data; | |
5638 | { | |
5639 | struct elf_final_link_info *finfo = (struct elf_final_link_info *) data; | |
013dec1a | 5640 | boolean strip; |
6ec3bb6a ILT |
5641 | Elf_Internal_Sym sym; |
5642 | ||
013dec1a ILT |
5643 | /* We don't want to output symbols that have never been mentioned by |
5644 | a regular file, or that we have been told to strip. However, if | |
5645 | h->indx is set to -2, the symbol is used by a reloc and we must | |
5646 | output it. */ | |
5647 | if (h->indx == -2) | |
5648 | strip = false; | |
5315c428 ILT |
5649 | else if (((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 |
5650 | || (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0) | |
5651 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0 | |
013dec1a ILT |
5652 | && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) == 0) |
5653 | strip = true; | |
5654 | else if (finfo->info->strip == strip_all | |
5655 | || (finfo->info->strip == strip_some | |
5656 | && bfd_hash_lookup (finfo->info->keep_hash, | |
5657 | h->root.root.string, | |
5658 | false, false) == NULL)) | |
5659 | strip = true; | |
5660 | else | |
5661 | strip = false; | |
5662 | ||
5663 | /* If we're stripping it, and it's not a dynamic symbol, there's | |
5664 | nothing else to do. */ | |
5665 | if (strip && h->dynindx == -1) | |
6ec3bb6a ILT |
5666 | return true; |
5667 | ||
5668 | sym.st_value = 0; | |
5669 | sym.st_size = h->size; | |
5670 | sym.st_info = ELF_ST_INFO (STB_GLOBAL, h->type); | |
5671 | sym.st_other = 0; | |
5672 | ||
5673 | switch (h->root.type) | |
5674 | { | |
5675 | default: | |
5676 | case bfd_link_hash_new: | |
5677 | abort (); | |
5678 | return false; | |
5679 | ||
5680 | case bfd_link_hash_undefined: | |
5681 | sym.st_shndx = SHN_UNDEF; | |
5682 | break; | |
5683 | ||
5684 | case bfd_link_hash_weak: | |
5685 | sym.st_shndx = SHN_UNDEF; | |
5686 | sym.st_info = ELF_ST_INFO (STB_WEAK, h->type); | |
5687 | break; | |
5688 | ||
5689 | case bfd_link_hash_defined: | |
5690 | { | |
5691 | asection *sec; | |
5692 | ||
5693 | sec = h->root.u.def.section; | |
013dec1a | 5694 | if (sec->output_section != NULL) |
6ec3bb6a | 5695 | { |
013dec1a ILT |
5696 | sym.st_shndx = elf_section_from_bfd_section (finfo->output_bfd, |
5697 | sec->output_section); | |
5698 | if (sym.st_shndx == (unsigned short) -1) | |
5699 | { | |
5700 | /* FIXME: No way to handle errors. */ | |
5701 | abort (); | |
5702 | } | |
6ec3bb6a | 5703 | |
013dec1a ILT |
5704 | /* ELF symbols in relocateable files are section relative, |
5705 | but in nonrelocateable files they are virtual | |
5706 | addresses. */ | |
5707 | sym.st_value = h->root.u.def.value + sec->output_offset; | |
5708 | if (! finfo->info->relocateable) | |
5709 | sym.st_value += sec->output_section->vma; | |
5710 | } | |
5711 | else | |
5712 | { | |
5713 | BFD_ASSERT (bfd_get_flavour (sec->owner) == bfd_target_elf_flavour | |
5714 | && elf_elfheader (sec->owner)->e_type == ET_DYN); | |
5715 | sym.st_shndx = SHN_UNDEF; | |
5716 | } | |
6ec3bb6a ILT |
5717 | } |
5718 | break; | |
5719 | ||
5720 | case bfd_link_hash_common: | |
5721 | sym.st_shndx = SHN_COMMON; | |
5722 | if (h->align == 0) | |
5723 | sym.st_value = 1; | |
5724 | else | |
5725 | sym.st_value = h->align; | |
5726 | break; | |
5727 | ||
5728 | case bfd_link_hash_indirect: | |
5729 | case bfd_link_hash_warning: | |
5730 | /* I have no idea how these should be handled. */ | |
5731 | return true; | |
5732 | } | |
5733 | ||
013dec1a ILT |
5734 | /* If this symbol should be put in the .dynsym section, then put it |
5735 | there now. We have already know the symbol index. We also fill | |
5736 | in the entry in the .hash section. */ | |
5737 | if (h->dynindx != -1) | |
5738 | { | |
5739 | struct elf_backend_data *bed; | |
5740 | size_t bucketcount; | |
5741 | size_t bucket; | |
5742 | bfd_byte *bucketpos; | |
5743 | bfd_vma chain; | |
5744 | ||
5745 | sym.st_name = h->dynstr_index; | |
5746 | ||
5747 | /* Give the processor backend a chance to tweak the symbol | |
5748 | value, and also to finish up anything that needs to be done | |
5749 | for this symbol. */ | |
5750 | bed = get_elf_backend_data (finfo->output_bfd); | |
5751 | if (! ((*bed->elf_backend_finish_dynamic_symbol) | |
5752 | (finfo->output_bfd, finfo->info, h, &sym))) | |
5753 | { | |
5754 | /* FIXME: No way to return error. */ | |
5755 | abort (); | |
5756 | } | |
5757 | ||
5758 | elf_swap_symbol_out (finfo->output_bfd, &sym, | |
5759 | ((Elf_External_Sym *) finfo->dynsym_sec->contents | |
5760 | + h->dynindx)); | |
5761 | ||
5762 | bucketcount = elf_hash_table (finfo->info)->bucketcount; | |
5763 | bucket = bfd_elf_hash (h->root.root.string) % bucketcount; | |
5764 | bucketpos = ((bfd_byte *) finfo->hash_sec->contents | |
5765 | + (bucket + 2) * (ARCH_SIZE / 8)); | |
5766 | chain = get_word (finfo->output_bfd, bucketpos); | |
5767 | put_word (finfo->output_bfd, h->dynindx, bucketpos); | |
5768 | put_word (finfo->output_bfd, chain, | |
5769 | ((bfd_byte *) finfo->hash_sec->contents | |
5770 | + (bucketcount + 2 + h->dynindx) * (ARCH_SIZE / 8))); | |
5771 | } | |
5772 | ||
5773 | /* If we're stripping it, then it was just a dynamic symbol, and | |
5774 | there's nothing else to do. */ | |
5775 | if (strip) | |
5776 | return true; | |
5777 | ||
6ec3bb6a ILT |
5778 | h->indx = finfo->output_bfd->symcount; |
5779 | ||
5780 | if (! elf_link_output_sym (finfo, h->root.root.string, &sym)) | |
5781 | { | |
5782 | /* FIXME: No way to return error. */ | |
5783 | abort (); | |
5784 | } | |
5785 | ||
5786 | return true; | |
5787 | } | |
5788 | ||
5789 | /* Link an input file into the linker output file. This function | |
5790 | handles all the sections and relocations of the input file at once. | |
5791 | This is so that we only have to read the local symbols once, and | |
5792 | don't have to keep them in memory. */ | |
5793 | ||
5794 | static boolean | |
5795 | elf_link_input_bfd (finfo, input_bfd) | |
5796 | struct elf_final_link_info *finfo; | |
5797 | bfd *input_bfd; | |
5798 | { | |
5799 | boolean (*relocate_section) PARAMS ((bfd *, struct bfd_link_info *, | |
5800 | bfd *, asection *, bfd_byte *, | |
5801 | Elf_Internal_Rela *, | |
5802 | Elf_Internal_Sym *, | |
5803 | asection **)); | |
5804 | bfd *output_bfd; | |
5805 | Elf_Internal_Shdr *symtab_hdr; | |
5315c428 ILT |
5806 | size_t locsymcount; |
5807 | size_t extsymoff; | |
6ec3bb6a ILT |
5808 | Elf_External_Sym *esym; |
5809 | Elf_External_Sym *esymend; | |
5810 | Elf_Internal_Sym *isym; | |
5811 | long *pindex; | |
5812 | asection **ppsection; | |
5813 | asection *o; | |
5814 | ||
5815 | output_bfd = finfo->output_bfd; | |
5816 | relocate_section = | |
5817 | get_elf_backend_data (output_bfd)->elf_backend_relocate_section; | |
5818 | ||
013dec1a ILT |
5819 | /* If this is a dynamic object, we don't want to do anything here: |
5820 | we don't want the local symbols, and we don't want the section | |
5821 | contents. */ | |
5822 | if (elf_elfheader (input_bfd)->e_type == ET_DYN) | |
5823 | return true; | |
5824 | ||
6ec3bb6a | 5825 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
5315c428 ILT |
5826 | if (elf_bad_symtab (input_bfd)) |
5827 | { | |
5828 | locsymcount = symtab_hdr->sh_size / sizeof (Elf_External_Sym); | |
5829 | extsymoff = 0; | |
5830 | } | |
5831 | else | |
5832 | { | |
5833 | locsymcount = symtab_hdr->sh_info; | |
5834 | extsymoff = symtab_hdr->sh_info; | |
5835 | } | |
5836 | ||
5837 | /* Read the local symbols. */ | |
6ec3bb6a ILT |
5838 | if (bfd_seek (input_bfd, symtab_hdr->sh_offset, SEEK_SET) != 0 |
5839 | || (bfd_read (finfo->external_syms, sizeof (Elf_External_Sym), | |
5315c428 ILT |
5840 | locsymcount, input_bfd) |
5841 | != locsymcount * sizeof (Elf_External_Sym))) | |
6ec3bb6a ILT |
5842 | return false; |
5843 | ||
5844 | /* Swap in the local symbols and write out the ones which we know | |
5845 | are going into the output file. */ | |
5846 | esym = finfo->external_syms; | |
5315c428 | 5847 | esymend = esym + locsymcount; |
6ec3bb6a ILT |
5848 | isym = finfo->internal_syms; |
5849 | pindex = finfo->indices; | |
5850 | ppsection = finfo->sections; | |
5851 | for (; esym < esymend; esym++, isym++, pindex++, ppsection++) | |
5852 | { | |
5853 | asection *isec; | |
5854 | const char *name; | |
5855 | bfd_vma oldval; | |
5856 | ||
5857 | elf_swap_symbol_in (input_bfd, esym, isym); | |
5858 | *pindex = -1; | |
5859 | ||
5315c428 ILT |
5860 | if (elf_bad_symtab (input_bfd)) |
5861 | { | |
5862 | if (ELF_ST_BIND (isym->st_info) != STB_LOCAL) | |
5863 | { | |
5864 | *ppsection = NULL; | |
5865 | continue; | |
5866 | } | |
5867 | } | |
5868 | ||
6ec3bb6a ILT |
5869 | if (isym->st_shndx == SHN_UNDEF) |
5870 | isec = &bfd_und_section; | |
5871 | else if (isym->st_shndx > 0 && isym->st_shndx < SHN_LORESERVE) | |
5872 | { | |
5873 | isec = section_from_elf_index (input_bfd, isym->st_shndx); | |
5874 | if (isec == NULL) | |
5875 | return false; | |
5876 | } | |
5877 | else if (isym->st_shndx == SHN_ABS) | |
5878 | isec = &bfd_abs_section; | |
5879 | else if (isym->st_shndx == SHN_COMMON) | |
5880 | isec = &bfd_com_section; | |
5881 | else | |
5882 | { | |
5883 | /* Who knows? */ | |
5884 | isec = NULL; | |
5885 | } | |
5886 | ||
5887 | *ppsection = isec; | |
5888 | ||
5889 | /* Don't output the first, undefined, symbol. */ | |
5890 | if (esym == finfo->external_syms) | |
5891 | continue; | |
5892 | ||
5893 | /* If we are stripping all symbols, we don't want to output this | |
5894 | one. */ | |
5895 | if (finfo->info->strip == strip_all) | |
5896 | continue; | |
5897 | ||
5898 | /* We never output section symbols. Instead, we use the section | |
5899 | symbol of the corresponding section in the output file. */ | |
5900 | if (ELF_ST_TYPE (isym->st_info) == STT_SECTION) | |
5901 | continue; | |
5902 | ||
5903 | /* If we are discarding all local symbols, we don't want to | |
5904 | output this one. If we are generating a relocateable output | |
5905 | file, then some of the local symbols may be required by | |
5906 | relocs; we output them below as we discover that they are | |
5907 | needed. */ | |
5908 | if (finfo->info->discard == discard_all) | |
5909 | continue; | |
5910 | ||
5911 | /* Get the name of the symbol. */ | |
5912 | name = elf_string_from_elf_section (input_bfd, symtab_hdr->sh_link, | |
5913 | isym->st_name); | |
5914 | if (name == NULL) | |
5915 | return false; | |
5916 | ||
5917 | /* See if we are discarding symbols with this name. */ | |
5918 | if ((finfo->info->strip == strip_some | |
5919 | && (bfd_hash_lookup (finfo->info->keep_hash, name, false, false) | |
5920 | == NULL)) | |
5921 | || (finfo->info->discard == discard_l | |
5922 | && strncmp (name, finfo->info->lprefix, | |
5923 | finfo->info->lprefix_len) == 0)) | |
5924 | continue; | |
5925 | ||
5926 | /* If we get here, we are going to output this symbol. */ | |
5927 | ||
5928 | /* Adjust the section index for the output file. */ | |
5929 | isym->st_shndx = elf_section_from_bfd_section (output_bfd, | |
5930 | isec->output_section); | |
013dec1a | 5931 | if (isym->st_shndx == (unsigned short) -1) |
6ec3bb6a ILT |
5932 | return false; |
5933 | ||
5934 | *pindex = output_bfd->symcount; | |
5935 | ||
5936 | /* ELF symbols in relocateable files are section relative, but | |
5937 | in executable files they are virtual addresses. Note that | |
5938 | this code assumes that all ELF sections have an associated | |
5939 | BFD section with a reasonable value for output_offset; below | |
5940 | we assume that they also have a reasonable value for | |
5941 | output_section. Any special sections must be set up to meet | |
5942 | these requirements. */ | |
5943 | oldval = isym->st_value; | |
5944 | isym->st_value += isec->output_offset; | |
5945 | if (! finfo->info->relocateable) | |
5946 | isym->st_value += isec->output_section->vma; | |
5947 | ||
5948 | if (! elf_link_output_sym (finfo, name, isym)) | |
5949 | return false; | |
5950 | ||
5951 | /* Restore the old value for reloc handling. */ | |
5952 | isym->st_value = oldval; | |
5953 | } | |
5954 | ||
5955 | /* Relocate the contents of each section. */ | |
5956 | for (o = input_bfd->sections; o != NULL; o = o->next) | |
5957 | { | |
5958 | Elf_Internal_Shdr *input_rel_hdr; | |
5959 | ||
5960 | if ((o->flags & SEC_HAS_CONTENTS) == 0) | |
5961 | continue; | |
5962 | ||
5963 | /* Read the contents of the section. */ | |
5964 | if (! bfd_get_section_contents (input_bfd, o, finfo->contents, | |
5965 | (file_ptr) 0, o->_raw_size)) | |
5966 | return false; | |
5967 | ||
5968 | if ((o->flags & SEC_RELOC) != 0) | |
5969 | { | |
5970 | /* Read in the relocs. */ | |
5971 | input_rel_hdr = &elf_section_data (o)->rel_hdr; | |
5972 | if (bfd_seek (input_bfd, input_rel_hdr->sh_offset, SEEK_SET) != 0 | |
5973 | || bfd_read (finfo->external_relocs, 1, input_rel_hdr->sh_size, | |
5974 | input_bfd) != input_rel_hdr->sh_size) | |
5975 | return false; | |
5976 | ||
5977 | /* Swap in the relocs. For convenience, we always produce | |
5978 | an Elf_Internal_Rela array; if the relocs are Rel, we set | |
5979 | the addend to 0. */ | |
5980 | if (input_rel_hdr->sh_entsize == sizeof (Elf_External_Rel)) | |
5981 | { | |
5982 | Elf_External_Rel *erel; | |
5983 | Elf_External_Rel *erelend; | |
5984 | Elf_Internal_Rela *irela; | |
5985 | ||
5986 | erel = (Elf_External_Rel *) finfo->external_relocs; | |
5987 | erelend = erel + o->reloc_count; | |
5988 | irela = finfo->internal_relocs; | |
5989 | for (; erel < erelend; erel++, irela++) | |
5990 | { | |
5991 | Elf_Internal_Rel irel; | |
5992 | ||
5993 | elf_swap_reloc_in (input_bfd, erel, &irel); | |
5994 | irela->r_offset = irel.r_offset; | |
5995 | irela->r_info = irel.r_info; | |
5996 | irela->r_addend = 0; | |
5997 | } | |
5998 | } | |
5999 | else | |
6000 | { | |
6001 | Elf_External_Rela *erela; | |
6002 | Elf_External_Rela *erelaend; | |
6003 | Elf_Internal_Rela *irela; | |
6004 | ||
6005 | BFD_ASSERT (input_rel_hdr->sh_entsize | |
6006 | == sizeof (Elf_External_Rela)); | |
6007 | ||
6008 | erela = (Elf_External_Rela *) finfo->external_relocs; | |
6009 | erelaend = erela + o->reloc_count; | |
6010 | irela = finfo->internal_relocs; | |
6011 | for (; erela < erelaend; erela++, irela++) | |
6012 | elf_swap_reloca_in (input_bfd, erela, irela); | |
6013 | } | |
6014 | ||
6015 | /* Relocate the section by invoking a back end routine. | |
6016 | ||
6017 | The back end routine is responsible for adjusting the | |
6018 | section contents as necessary, and (if using Rela relocs | |
6019 | and generating a relocateable output file) adjusting the | |
6020 | reloc addend as necessary. | |
6021 | ||
6022 | The back end routine does not have to worry about setting | |
6023 | the reloc address or the reloc symbol index. | |
6024 | ||
6025 | The back end routine is given a pointer to the swapped in | |
6026 | internal symbols, and can access the hash table entries | |
6027 | for the external symbols via elf_sym_hashes (input_bfd). | |
6028 | ||
6029 | When generating relocateable output, the back end routine | |
6030 | must handle STB_LOCAL/STT_SECTION symbols specially. The | |
6031 | output symbol is going to be a section symbol | |
6032 | corresponding to the output section, which will require | |
6033 | the addend to be adjusted. */ | |
6034 | ||
6035 | if (! (*relocate_section) (output_bfd, finfo->info, | |
6036 | input_bfd, o, | |
6037 | finfo->contents, | |
6038 | finfo->internal_relocs, | |
6039 | finfo->internal_syms, | |
6040 | finfo->sections)) | |
6041 | return false; | |
6042 | ||
6043 | if (finfo->info->relocateable) | |
6044 | { | |
6045 | Elf_Internal_Rela *irela; | |
6046 | Elf_Internal_Rela *irelaend; | |
6047 | struct elf_link_hash_entry **rel_hash; | |
6048 | Elf_Internal_Shdr *output_rel_hdr; | |
6049 | ||
6050 | /* Adjust the reloc addresses and symbol indices. */ | |
6051 | ||
6052 | irela = finfo->internal_relocs; | |
6053 | irelaend = irela + o->reloc_count; | |
6054 | rel_hash = (elf_section_data (o->output_section)->rel_hashes | |
6055 | + o->output_section->reloc_count); | |
6056 | for (; irela < irelaend; irela++, rel_hash++) | |
6057 | { | |
6058 | long r_symndx; | |
6059 | Elf_Internal_Sym *isym; | |
6060 | asection *sec; | |
6061 | ||
6062 | irela->r_offset += o->output_offset; | |
6063 | ||
6064 | r_symndx = ELF_R_SYM (irela->r_info); | |
6065 | ||
6066 | if (r_symndx == 0) | |
6067 | continue; | |
6068 | ||
5315c428 ILT |
6069 | if (r_symndx >= locsymcount |
6070 | || (elf_bad_symtab (input_bfd) | |
6071 | && finfo->sections[r_symndx] == NULL)) | |
6ec3bb6a ILT |
6072 | { |
6073 | long indx; | |
6074 | ||
6075 | /* This is a reloc against a global symbol. We | |
6076 | have not yet output all the local symbols, so | |
6077 | we do not know the symbol index of any global | |
6078 | symbol. We set the rel_hash entry for this | |
6079 | reloc to point to the global hash table entry | |
6080 | for this symbol. The symbol index is then | |
6081 | set at the end of elf_bfd_final_link. */ | |
5315c428 | 6082 | indx = r_symndx - extsymoff; |
6ec3bb6a ILT |
6083 | *rel_hash = elf_sym_hashes (input_bfd)[indx]; |
6084 | ||
6085 | /* Setting the index to -2 tells | |
6086 | elf_link_output_extsym that this symbol is | |
6087 | used by a reloc. */ | |
6088 | BFD_ASSERT ((*rel_hash)->indx < 0); | |
6089 | (*rel_hash)->indx = -2; | |
6090 | ||
6091 | continue; | |
6092 | } | |
6093 | ||
6094 | /* This is a reloc against a local symbol. */ | |
6095 | ||
6096 | *rel_hash = NULL; | |
6097 | isym = finfo->internal_syms + r_symndx; | |
6098 | sec = finfo->sections[r_symndx]; | |
6099 | if (ELF_ST_TYPE (isym->st_info) == STT_SECTION) | |
6100 | { | |
6101 | /* I suppose the backend ought to fill in the | |
6102 | section of any STT_SECTION symbol against a | |
6103 | processor specific section. */ | |
6104 | if (sec == NULL | |
6105 | || sec == &bfd_und_section | |
6106 | || sec == &bfd_com_section) | |
6107 | { | |
6108 | bfd_set_error (bfd_error_bad_value); | |
6109 | return false; | |
6110 | } | |
6111 | else if (sec == &bfd_abs_section) | |
6112 | r_symndx = 0; | |
6113 | else | |
013dec1a ILT |
6114 | { |
6115 | r_symndx = sec->output_section->target_index; | |
6116 | if (r_symndx == 0) | |
6117 | abort (); | |
6118 | } | |
6ec3bb6a ILT |
6119 | } |
6120 | else | |
6121 | { | |
6122 | if (finfo->indices[r_symndx] == -1) | |
6123 | { | |
6124 | unsigned long link; | |
6125 | const char *name; | |
6126 | asection *osec; | |
6127 | ||
6128 | if (finfo->info->strip == strip_all) | |
6129 | { | |
6130 | /* You can't do ld -r -s. */ | |
6131 | bfd_set_error (bfd_error_invalid_operation); | |
6132 | return false; | |
6133 | } | |
6134 | ||
6135 | /* This symbol was skipped earlier, but | |
6136 | since it is needed by a reloc, we | |
6137 | must output it now. */ | |
6138 | link = symtab_hdr->sh_link; | |
6139 | name = elf_string_from_elf_section (input_bfd, | |
6140 | link, | |
6141 | isym->st_name); | |
6142 | if (name == NULL) | |
6143 | return false; | |
6144 | ||
6145 | osec = sec->output_section; | |
6146 | isym->st_shndx = | |
6147 | elf_section_from_bfd_section (output_bfd, | |
6148 | osec); | |
013dec1a | 6149 | if (isym->st_shndx == (unsigned short) -1) |
6ec3bb6a ILT |
6150 | return false; |
6151 | ||
6152 | isym->st_value += sec->output_offset; | |
6153 | if (! finfo->info->relocateable) | |
6154 | isym->st_value += osec->vma; | |
6155 | ||
6156 | finfo->indices[r_symndx] = output_bfd->symcount; | |
6157 | ||
6158 | if (! elf_link_output_sym (finfo, name, isym)) | |
6159 | return false; | |
6160 | } | |
6161 | ||
6162 | r_symndx = finfo->indices[r_symndx]; | |
6163 | } | |
6164 | ||
6165 | irela->r_info = ELF_R_INFO (r_symndx, | |
6166 | ELF_R_TYPE (irela->r_info)); | |
6167 | } | |
6168 | ||
6169 | /* Swap out the relocs. */ | |
6170 | output_rel_hdr = &elf_section_data (o->output_section)->rel_hdr; | |
6171 | BFD_ASSERT (output_rel_hdr->sh_entsize | |
6172 | == input_rel_hdr->sh_entsize); | |
6173 | irela = finfo->internal_relocs; | |
6174 | irelaend = irela + o->reloc_count; | |
6175 | if (input_rel_hdr->sh_entsize == sizeof (Elf_External_Rel)) | |
6176 | { | |
6177 | Elf_External_Rel *erel; | |
6178 | ||
6179 | erel = ((Elf_External_Rel *) output_rel_hdr->contents | |
6180 | + o->output_section->reloc_count); | |
6181 | for (; irela < irelaend; irela++, erel++) | |
6182 | { | |
6183 | Elf_Internal_Rel irel; | |
6184 | ||
6185 | irel.r_offset = irela->r_offset; | |
6186 | irel.r_info = irela->r_info; | |
6187 | BFD_ASSERT (irela->r_addend == 0); | |
6188 | elf_swap_reloc_out (output_bfd, &irel, erel); | |
6189 | } | |
6190 | } | |
6191 | else | |
6192 | { | |
6193 | Elf_External_Rela *erela; | |
6194 | ||
6195 | BFD_ASSERT (input_rel_hdr->sh_entsize | |
6196 | == sizeof (Elf_External_Rela)); | |
6197 | erela = ((Elf_External_Rela *) output_rel_hdr->contents | |
6198 | + o->output_section->reloc_count); | |
6199 | for (; irela < irelaend; irela++, erela++) | |
6200 | elf_swap_reloca_out (output_bfd, irela, erela); | |
6201 | } | |
6202 | ||
6203 | o->output_section->reloc_count += o->reloc_count; | |
6204 | } | |
6205 | } | |
6206 | ||
6207 | /* Write out the modified section contents. */ | |
6208 | if (! bfd_set_section_contents (output_bfd, o->output_section, | |
6209 | finfo->contents, o->output_offset, | |
6210 | (o->_cooked_size != 0 | |
6211 | ? o->_cooked_size | |
6212 | : o->_raw_size))) | |
6213 | return false; | |
6214 | } | |
6215 | ||
6216 | return true; | |
6217 | } | |
6218 | ||
6219 | /* Generate a reloc when linking an ELF file. This is a reloc | |
6220 | requested by the linker, and does come from any input file. This | |
6221 | is used to build constructor and destructor tables when linking | |
6222 | with -Ur. */ | |
6223 | ||
6224 | static boolean | |
6225 | elf_reloc_link_order (output_bfd, info, output_section, link_order) | |
6226 | bfd *output_bfd; | |
6227 | struct bfd_link_info *info; | |
6228 | asection *output_section; | |
6229 | struct bfd_link_order *link_order; | |
6230 | { | |
6231 | const reloc_howto_type *howto; | |
6232 | long indx; | |
6233 | bfd_vma offset; | |
6234 | struct elf_link_hash_entry **rel_hash_ptr; | |
6235 | Elf_Internal_Shdr *rel_hdr; | |
6236 | ||
6237 | howto = bfd_reloc_type_lookup (output_bfd, link_order->u.reloc.p->reloc); | |
6238 | if (howto == NULL) | |
6239 | { | |
6240 | bfd_set_error (bfd_error_bad_value); | |
6241 | return false; | |
6242 | } | |
6243 | ||
6244 | /* If this is an inplace reloc, we must write the addend into the | |
6245 | object file. */ | |
6246 | if (howto->partial_inplace | |
6247 | && link_order->u.reloc.p->addend != 0) | |
6248 | { | |
6249 | bfd_size_type size; | |
6250 | bfd_reloc_status_type rstat; | |
6251 | bfd_byte *buf; | |
6252 | boolean ok; | |
6253 | ||
6254 | size = bfd_get_reloc_size (howto); | |
6255 | buf = (bfd_byte *) bfd_zmalloc (size); | |
6256 | if (buf == (bfd_byte *) NULL) | |
6257 | { | |
6258 | bfd_set_error (bfd_error_no_memory); | |
6259 | return false; | |
6260 | } | |
6261 | rstat = _bfd_relocate_contents (howto, output_bfd, | |
6262 | link_order->u.reloc.p->addend, buf); | |
6263 | switch (rstat) | |
6264 | { | |
6265 | case bfd_reloc_ok: | |
6266 | break; | |
6267 | default: | |
6268 | case bfd_reloc_outofrange: | |
6269 | abort (); | |
6270 | case bfd_reloc_overflow: | |
6271 | if (! ((*info->callbacks->reloc_overflow) | |
6272 | (info, | |
6273 | (link_order->type == bfd_section_reloc_link_order | |
6274 | ? bfd_section_name (output_bfd, | |
6275 | link_order->u.reloc.p->u.section) | |
6276 | : link_order->u.reloc.p->u.name), | |
6277 | howto->name, link_order->u.reloc.p->addend, | |
6278 | (bfd *) NULL, (asection *) NULL, (bfd_vma) 0))) | |
6279 | { | |
6280 | free (buf); | |
6281 | return false; | |
6282 | } | |
6283 | break; | |
6284 | } | |
6285 | ok = bfd_set_section_contents (output_bfd, output_section, (PTR) buf, | |
6286 | (file_ptr) link_order->offset, size); | |
6287 | free (buf); | |
6288 | if (! ok) | |
6289 | return false; | |
6290 | } | |
6291 | ||
6292 | /* Figure out the symbol index. */ | |
6293 | rel_hash_ptr = (elf_section_data (output_section)->rel_hashes | |
6294 | + output_section->reloc_count); | |
6295 | if (link_order->type == bfd_section_reloc_link_order) | |
6296 | { | |
013dec1a ILT |
6297 | indx = link_order->u.reloc.p->u.section->target_index; |
6298 | if (indx == 0) | |
6299 | abort (); | |
6ec3bb6a ILT |
6300 | *rel_hash_ptr = NULL; |
6301 | } | |
6302 | else | |
6303 | { | |
6304 | struct elf_link_hash_entry *h; | |
6305 | ||
6306 | h = elf_link_hash_lookup (elf_hash_table (info), | |
6307 | link_order->u.reloc.p->u.name, | |
6308 | false, false, true); | |
6309 | if (h != NULL) | |
6310 | { | |
6311 | /* Setting the index to -2 tells elf_link_output_extsym that | |
6312 | this symbol is used by a reloc. */ | |
6313 | h->indx = -2; | |
6314 | *rel_hash_ptr = h; | |
6315 | indx = 0; | |
6316 | } | |
6317 | else | |
6318 | { | |
6319 | if (! ((*info->callbacks->unattached_reloc) | |
6320 | (info, link_order->u.reloc.p->u.name, (bfd *) NULL, | |
6321 | (asection *) NULL, (bfd_vma) 0))) | |
6322 | return false; | |
6323 | indx = 0; | |
6324 | } | |
6325 | } | |
6326 | ||
6327 | /* The address of a reloc is relative to the section in a | |
6328 | relocateable file, and is a virtual address in an executable | |
6329 | file. */ | |
6330 | offset = link_order->offset; | |
6331 | if (! info->relocateable) | |
6332 | offset += output_section->vma; | |
6333 | ||
6334 | rel_hdr = &elf_section_data (output_section)->rel_hdr; | |
6335 | ||
6336 | if (rel_hdr->sh_type == SHT_REL) | |
6337 | { | |
6338 | Elf_Internal_Rel irel; | |
6339 | Elf_External_Rel *erel; | |
6340 | ||
6341 | irel.r_offset = offset; | |
6342 | irel.r_info = ELF_R_INFO (indx, howto->type); | |
6343 | erel = ((Elf_External_Rel *) rel_hdr->contents | |
6344 | + output_section->reloc_count); | |
6345 | elf_swap_reloc_out (output_bfd, &irel, erel); | |
6346 | } | |
6347 | else | |
6348 | { | |
6349 | Elf_Internal_Rela irela; | |
6350 | Elf_External_Rela *erela; | |
6351 | ||
6352 | irela.r_offset = offset; | |
6353 | irela.r_info = ELF_R_INFO (indx, howto->type); | |
6354 | irela.r_addend = link_order->u.reloc.p->addend; | |
6355 | erela = ((Elf_External_Rela *) rel_hdr->contents | |
6356 | + output_section->reloc_count); | |
6357 | elf_swap_reloca_out (output_bfd, &irela, erela); | |
6358 | } | |
6359 | ||
6360 | ++output_section->reloc_count; | |
6361 | ||
6362 | return true; | |
6363 | } |