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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. | |
5546cc7e KR |
60 | |
61 | (4) We need a published spec for 64-bit ELF. We've got some stuff here | |
62 | that we're using for SPARC V9 64-bit chips, but don't assume that | |
63 | it's cast in stone. | |
d24928c0 | 64 | */ |
244ffee7 JK |
65 | |
66 | #include <string.h> /* For strrchr and friends */ | |
67 | #include "bfd.h" | |
68 | #include "sysdep.h" | |
6ec3bb6a | 69 | #include "bfdlink.h" |
244ffee7 JK |
70 | #include "libbfd.h" |
71 | #include "libelf.h" | |
72 | ||
32090b8e | 73 | /* Renaming structures, typedefs, macros and functions to be size-specific. */ |
244ffee7 | 74 | #define Elf_External_Ehdr NAME(Elf,External_Ehdr) |
244ffee7 | 75 | #define Elf_External_Sym NAME(Elf,External_Sym) |
244ffee7 | 76 | #define Elf_External_Shdr NAME(Elf,External_Shdr) |
244ffee7 | 77 | #define Elf_External_Phdr NAME(Elf,External_Phdr) |
244ffee7 JK |
78 | #define Elf_External_Rel NAME(Elf,External_Rel) |
79 | #define Elf_External_Rela NAME(Elf,External_Rela) | |
013dec1a | 80 | #define Elf_External_Dyn NAME(Elf,External_Dyn) |
244ffee7 | 81 | |
244ffee7 JK |
82 | #define elf_core_file_failing_command NAME(bfd_elf,core_file_failing_command) |
83 | #define elf_core_file_failing_signal NAME(bfd_elf,core_file_failing_signal) | |
cb71adf1 PS |
84 | #define elf_core_file_matches_executable_p \ |
85 | NAME(bfd_elf,core_file_matches_executable_p) | |
244ffee7 JK |
86 | #define elf_object_p NAME(bfd_elf,object_p) |
87 | #define elf_core_file_p NAME(bfd_elf,core_file_p) | |
244ffee7 | 88 | #define elf_get_symtab_upper_bound NAME(bfd_elf,get_symtab_upper_bound) |
cb71adf1 PS |
89 | #define elf_get_dynamic_symtab_upper_bound \ |
90 | NAME(bfd_elf,get_dynamic_symtab_upper_bound) | |
013dec1a ILT |
91 | #define elf_swap_reloc_in NAME(bfd_elf,swap_reloc_in) |
92 | #define elf_swap_reloca_in NAME(bfd_elf,swap_reloca_in) | |
93 | #define elf_swap_reloc_out NAME(bfd_elf,swap_reloc_out) | |
94 | #define elf_swap_reloca_out NAME(bfd_elf,swap_reloca_out) | |
71edd06d ILT |
95 | #define elf_swap_symbol_in NAME(bfd_elf,swap_symbol_in) |
96 | #define elf_swap_symbol_out NAME(bfd_elf,swap_symbol_out) | |
013dec1a ILT |
97 | #define elf_swap_dyn_in NAME(bfd_elf,swap_dyn_in) |
98 | #define elf_swap_dyn_out NAME(bfd_elf,swap_dyn_out) | |
244ffee7 JK |
99 | #define elf_get_reloc_upper_bound NAME(bfd_elf,get_reloc_upper_bound) |
100 | #define elf_canonicalize_reloc NAME(bfd_elf,canonicalize_reloc) | |
101 | #define elf_get_symtab NAME(bfd_elf,get_symtab) | |
cb71adf1 PS |
102 | #define elf_canonicalize_dynamic_symtab \ |
103 | NAME(bfd_elf,canonicalize_dynamic_symtab) | |
244ffee7 JK |
104 | #define elf_make_empty_symbol NAME(bfd_elf,make_empty_symbol) |
105 | #define elf_get_symbol_info NAME(bfd_elf,get_symbol_info) | |
106 | #define elf_print_symbol NAME(bfd_elf,print_symbol) | |
107 | #define elf_get_lineno NAME(bfd_elf,get_lineno) | |
108 | #define elf_set_arch_mach NAME(bfd_elf,set_arch_mach) | |
109 | #define elf_find_nearest_line NAME(bfd_elf,find_nearest_line) | |
110 | #define elf_sizeof_headers NAME(bfd_elf,sizeof_headers) | |
111 | #define elf_set_section_contents NAME(bfd_elf,set_section_contents) | |
112 | #define elf_no_info_to_howto NAME(bfd_elf,no_info_to_howto) | |
113 | #define elf_no_info_to_howto_rel NAME(bfd_elf,no_info_to_howto_rel) | |
fce36137 | 114 | #define elf_new_section_hook NAME(bfd_elf,new_section_hook) |
32090b8e | 115 | #define write_relocs NAME(bfd_elf,_write_relocs) |
f035cc47 | 116 | #define elf_find_section NAME(bfd_elf,find_section) |
6ec3bb6a | 117 | #define elf_bfd_link_add_symbols NAME(bfd_elf,bfd_link_add_symbols) |
013dec1a | 118 | #define elf_add_dynamic_entry NAME(bfd_elf,add_dynamic_entry) |
6ec3bb6a | 119 | #define elf_bfd_final_link NAME(bfd_elf,bfd_final_link) |
244ffee7 | 120 | |
6a3eb9b6 KR |
121 | #if ARCH_SIZE == 64 |
122 | #define ELF_R_INFO(X,Y) ELF64_R_INFO(X,Y) | |
123 | #define ELF_R_SYM(X) ELF64_R_SYM(X) | |
6ec3bb6a | 124 | #define ELF_R_TYPE(X) ELF64_R_TYPE(X) |
32090b8e | 125 | #define ELFCLASS ELFCLASS64 |
f035cc47 | 126 | #define FILE_ALIGN 8 |
013dec1a | 127 | #define LOG_FILE_ALIGN 3 |
6a3eb9b6 KR |
128 | #endif |
129 | #if ARCH_SIZE == 32 | |
130 | #define ELF_R_INFO(X,Y) ELF32_R_INFO(X,Y) | |
131 | #define ELF_R_SYM(X) ELF32_R_SYM(X) | |
6ec3bb6a | 132 | #define ELF_R_TYPE(X) ELF32_R_TYPE(X) |
32090b8e | 133 | #define ELFCLASS ELFCLASS32 |
f035cc47 | 134 | #define FILE_ALIGN 4 |
013dec1a | 135 | #define LOG_FILE_ALIGN 2 |
244ffee7 JK |
136 | #endif |
137 | ||
244ffee7 JK |
138 | /* Forward declarations of static functions */ |
139 | ||
6ec3bb6a ILT |
140 | static unsigned long bfd_add_to_strtab |
141 | PARAMS ((bfd *, struct strtab *, const char *)); | |
2e03ce18 | 142 | static asection *section_from_elf_index PARAMS ((bfd *, unsigned int)); |
244ffee7 JK |
143 | |
144 | static int elf_section_from_bfd_section PARAMS ((bfd *, struct sec *)); | |
145 | ||
cb71adf1 | 146 | static long elf_slurp_symbol_table PARAMS ((bfd *, asymbol **, boolean)); |
244ffee7 | 147 | |
ea617174 ILT |
148 | static boolean elf_slurp_reloc_table PARAMS ((bfd *, asection *, asymbol **)); |
149 | ||
244ffee7 | 150 | static int elf_symbol_from_bfd_symbol PARAMS ((bfd *, |
1c6042ee | 151 | struct symbol_cache_entry **)); |
244ffee7 | 152 | |
6ec3bb6a ILT |
153 | static boolean elf_compute_section_file_positions |
154 | PARAMS ((bfd *, struct bfd_link_info *)); | |
155 | static boolean prep_headers PARAMS ((bfd *)); | |
fa15568a | 156 | static void elf_fake_sections PARAMS ((bfd *, asection *, PTR)); |
6ec3bb6a | 157 | static boolean assign_section_numbers PARAMS ((bfd *)); |
013dec1a ILT |
158 | static file_ptr align_file_position PARAMS ((file_ptr)); |
159 | static file_ptr assign_file_position_for_section | |
160 | PARAMS ((Elf_Internal_Shdr *, file_ptr, boolean)); | |
6ec3bb6a | 161 | static boolean assign_file_positions_except_relocs PARAMS ((bfd *, boolean)); |
013dec1a ILT |
162 | static void assign_file_positions_for_relocs PARAMS ((bfd *)); |
163 | static bfd_size_type get_program_header_size PARAMS ((bfd *)); | |
164 | static file_ptr map_program_segments | |
165 | PARAMS ((bfd *, file_ptr, Elf_Internal_Shdr *, bfd_size_type)); | |
6ec3bb6a | 166 | |
9783e04a | 167 | static boolean elf_map_symbols PARAMS ((bfd *)); |
b9d5cdf0 | 168 | static boolean swap_out_syms PARAMS ((bfd *)); |
244ffee7 | 169 | |
2e03ce18 ILT |
170 | static boolean bfd_section_from_shdr PARAMS ((bfd *, unsigned int shindex)); |
171 | ||
6a3eb9b6 KR |
172 | #ifdef DEBUG |
173 | static void elf_debug_section PARAMS ((char *, int, Elf_Internal_Shdr *)); | |
174 | static void elf_debug_file PARAMS ((Elf_Internal_Ehdr *)); | |
175 | #endif | |
238ac6ec | 176 | |
32090b8e KR |
177 | #define elf_string_from_elf_strtab(abfd,strindex) \ |
178 | elf_string_from_elf_section(abfd,elf_elfheader(abfd)->e_shstrndx,strindex) | |
32090b8e | 179 | \f |
1c6042ee | 180 | |
32090b8e KR |
181 | /* Structure swapping routines */ |
182 | ||
6a3eb9b6 KR |
183 | /* Should perhaps use put_offset, put_word, etc. For now, the two versions |
184 | can be handled by explicitly specifying 32 bits or "the long type". */ | |
238ac6ec KR |
185 | #if ARCH_SIZE == 64 |
186 | #define put_word bfd_h_put_64 | |
187 | #define get_word bfd_h_get_64 | |
188 | #endif | |
189 | #if ARCH_SIZE == 32 | |
190 | #define put_word bfd_h_put_32 | |
191 | #define get_word bfd_h_get_32 | |
192 | #endif | |
193 | ||
244ffee7 JK |
194 | /* Translate an ELF symbol in external format into an ELF symbol in internal |
195 | format. */ | |
196 | ||
71edd06d | 197 | void |
1c6042ee ILT |
198 | elf_swap_symbol_in (abfd, src, dst) |
199 | bfd *abfd; | |
200 | Elf_External_Sym *src; | |
201 | Elf_Internal_Sym *dst; | |
244ffee7 JK |
202 | { |
203 | dst->st_name = bfd_h_get_32 (abfd, (bfd_byte *) src->st_name); | |
238ac6ec KR |
204 | dst->st_value = get_word (abfd, (bfd_byte *) src->st_value); |
205 | dst->st_size = get_word (abfd, (bfd_byte *) src->st_size); | |
244ffee7 JK |
206 | dst->st_info = bfd_h_get_8 (abfd, (bfd_byte *) src->st_info); |
207 | dst->st_other = bfd_h_get_8 (abfd, (bfd_byte *) src->st_other); | |
208 | dst->st_shndx = bfd_h_get_16 (abfd, (bfd_byte *) src->st_shndx); | |
209 | } | |
210 | ||
211 | /* Translate an ELF symbol in internal format into an ELF symbol in external | |
212 | format. */ | |
213 | ||
71edd06d | 214 | void |
1c6042ee ILT |
215 | elf_swap_symbol_out (abfd, src, dst) |
216 | bfd *abfd; | |
217 | Elf_Internal_Sym *src; | |
218 | Elf_External_Sym *dst; | |
244ffee7 JK |
219 | { |
220 | bfd_h_put_32 (abfd, src->st_name, dst->st_name); | |
238ac6ec KR |
221 | put_word (abfd, src->st_value, dst->st_value); |
222 | put_word (abfd, src->st_size, dst->st_size); | |
244ffee7 JK |
223 | bfd_h_put_8 (abfd, src->st_info, dst->st_info); |
224 | bfd_h_put_8 (abfd, src->st_other, dst->st_other); | |
225 | bfd_h_put_16 (abfd, src->st_shndx, dst->st_shndx); | |
226 | } | |
227 | ||
228 | ||
229 | /* Translate an ELF file header in external format into an ELF file header in | |
230 | internal format. */ | |
231 | ||
232 | static void | |
1c6042ee ILT |
233 | elf_swap_ehdr_in (abfd, src, dst) |
234 | bfd *abfd; | |
235 | Elf_External_Ehdr *src; | |
236 | Elf_Internal_Ehdr *dst; | |
244ffee7 JK |
237 | { |
238 | memcpy (dst->e_ident, src->e_ident, EI_NIDENT); | |
239 | dst->e_type = bfd_h_get_16 (abfd, (bfd_byte *) src->e_type); | |
240 | dst->e_machine = bfd_h_get_16 (abfd, (bfd_byte *) src->e_machine); | |
241 | dst->e_version = bfd_h_get_32 (abfd, (bfd_byte *) src->e_version); | |
238ac6ec KR |
242 | dst->e_entry = get_word (abfd, (bfd_byte *) src->e_entry); |
243 | dst->e_phoff = get_word (abfd, (bfd_byte *) src->e_phoff); | |
244 | dst->e_shoff = get_word (abfd, (bfd_byte *) src->e_shoff); | |
244ffee7 JK |
245 | dst->e_flags = bfd_h_get_32 (abfd, (bfd_byte *) src->e_flags); |
246 | dst->e_ehsize = bfd_h_get_16 (abfd, (bfd_byte *) src->e_ehsize); | |
247 | dst->e_phentsize = bfd_h_get_16 (abfd, (bfd_byte *) src->e_phentsize); | |
248 | dst->e_phnum = bfd_h_get_16 (abfd, (bfd_byte *) src->e_phnum); | |
249 | dst->e_shentsize = bfd_h_get_16 (abfd, (bfd_byte *) src->e_shentsize); | |
250 | dst->e_shnum = bfd_h_get_16 (abfd, (bfd_byte *) src->e_shnum); | |
251 | dst->e_shstrndx = bfd_h_get_16 (abfd, (bfd_byte *) src->e_shstrndx); | |
252 | } | |
253 | ||
254 | /* Translate an ELF file header in internal format into an ELF file header in | |
255 | external format. */ | |
256 | ||
257 | static void | |
1c6042ee ILT |
258 | elf_swap_ehdr_out (abfd, src, dst) |
259 | bfd *abfd; | |
260 | Elf_Internal_Ehdr *src; | |
261 | Elf_External_Ehdr *dst; | |
244ffee7 JK |
262 | { |
263 | memcpy (dst->e_ident, src->e_ident, EI_NIDENT); | |
264 | /* note that all elements of dst are *arrays of unsigned char* already... */ | |
265 | bfd_h_put_16 (abfd, src->e_type, dst->e_type); | |
266 | bfd_h_put_16 (abfd, src->e_machine, dst->e_machine); | |
267 | bfd_h_put_32 (abfd, src->e_version, dst->e_version); | |
238ac6ec KR |
268 | put_word (abfd, src->e_entry, dst->e_entry); |
269 | put_word (abfd, src->e_phoff, dst->e_phoff); | |
270 | put_word (abfd, src->e_shoff, dst->e_shoff); | |
244ffee7 JK |
271 | bfd_h_put_32 (abfd, src->e_flags, dst->e_flags); |
272 | bfd_h_put_16 (abfd, src->e_ehsize, dst->e_ehsize); | |
273 | bfd_h_put_16 (abfd, src->e_phentsize, dst->e_phentsize); | |
274 | bfd_h_put_16 (abfd, src->e_phnum, dst->e_phnum); | |
275 | bfd_h_put_16 (abfd, src->e_shentsize, dst->e_shentsize); | |
276 | bfd_h_put_16 (abfd, src->e_shnum, dst->e_shnum); | |
277 | bfd_h_put_16 (abfd, src->e_shstrndx, dst->e_shstrndx); | |
278 | } | |
279 | ||
280 | ||
281 | /* Translate an ELF section header table entry in external format into an | |
282 | ELF section header table entry in internal format. */ | |
283 | ||
284 | static void | |
1c6042ee ILT |
285 | elf_swap_shdr_in (abfd, src, dst) |
286 | bfd *abfd; | |
287 | Elf_External_Shdr *src; | |
288 | Elf_Internal_Shdr *dst; | |
244ffee7 JK |
289 | { |
290 | dst->sh_name = bfd_h_get_32 (abfd, (bfd_byte *) src->sh_name); | |
291 | dst->sh_type = bfd_h_get_32 (abfd, (bfd_byte *) src->sh_type); | |
238ac6ec KR |
292 | dst->sh_flags = get_word (abfd, (bfd_byte *) src->sh_flags); |
293 | dst->sh_addr = get_word (abfd, (bfd_byte *) src->sh_addr); | |
294 | dst->sh_offset = get_word (abfd, (bfd_byte *) src->sh_offset); | |
295 | dst->sh_size = get_word (abfd, (bfd_byte *) src->sh_size); | |
244ffee7 JK |
296 | dst->sh_link = bfd_h_get_32 (abfd, (bfd_byte *) src->sh_link); |
297 | dst->sh_info = bfd_h_get_32 (abfd, (bfd_byte *) src->sh_info); | |
238ac6ec KR |
298 | dst->sh_addralign = get_word (abfd, (bfd_byte *) src->sh_addralign); |
299 | dst->sh_entsize = get_word (abfd, (bfd_byte *) src->sh_entsize); | |
244ffee7 JK |
300 | /* we haven't done any processing on it yet, so... */ |
301 | dst->rawdata = (void *) 0; | |
302 | } | |
303 | ||
304 | /* Translate an ELF section header table entry in internal format into an | |
305 | ELF section header table entry in external format. */ | |
306 | ||
307 | static void | |
1c6042ee ILT |
308 | elf_swap_shdr_out (abfd, src, dst) |
309 | bfd *abfd; | |
310 | Elf_Internal_Shdr *src; | |
311 | Elf_External_Shdr *dst; | |
244ffee7 JK |
312 | { |
313 | /* note that all elements of dst are *arrays of unsigned char* already... */ | |
314 | bfd_h_put_32 (abfd, src->sh_name, dst->sh_name); | |
315 | bfd_h_put_32 (abfd, src->sh_type, dst->sh_type); | |
238ac6ec KR |
316 | put_word (abfd, src->sh_flags, dst->sh_flags); |
317 | put_word (abfd, src->sh_addr, dst->sh_addr); | |
318 | put_word (abfd, src->sh_offset, dst->sh_offset); | |
319 | put_word (abfd, src->sh_size, dst->sh_size); | |
244ffee7 JK |
320 | bfd_h_put_32 (abfd, src->sh_link, dst->sh_link); |
321 | bfd_h_put_32 (abfd, src->sh_info, dst->sh_info); | |
238ac6ec KR |
322 | put_word (abfd, src->sh_addralign, dst->sh_addralign); |
323 | put_word (abfd, src->sh_entsize, dst->sh_entsize); | |
244ffee7 JK |
324 | } |
325 | ||
326 | ||
327 | /* Translate an ELF program header table entry in external format into an | |
328 | ELF program header table entry in internal format. */ | |
329 | ||
330 | static void | |
1c6042ee ILT |
331 | elf_swap_phdr_in (abfd, src, dst) |
332 | bfd *abfd; | |
333 | Elf_External_Phdr *src; | |
334 | Elf_Internal_Phdr *dst; | |
244ffee7 JK |
335 | { |
336 | dst->p_type = bfd_h_get_32 (abfd, (bfd_byte *) src->p_type); | |
244ffee7 | 337 | dst->p_flags = bfd_h_get_32 (abfd, (bfd_byte *) src->p_flags); |
238ac6ec KR |
338 | dst->p_offset = get_word (abfd, (bfd_byte *) src->p_offset); |
339 | dst->p_vaddr = get_word (abfd, (bfd_byte *) src->p_vaddr); | |
340 | dst->p_paddr = get_word (abfd, (bfd_byte *) src->p_paddr); | |
341 | dst->p_filesz = get_word (abfd, (bfd_byte *) src->p_filesz); | |
342 | dst->p_memsz = get_word (abfd, (bfd_byte *) src->p_memsz); | |
343 | dst->p_align = get_word (abfd, (bfd_byte *) src->p_align); | |
244ffee7 JK |
344 | } |
345 | ||
244ffee7 | 346 | static void |
1c6042ee ILT |
347 | elf_swap_phdr_out (abfd, src, dst) |
348 | bfd *abfd; | |
349 | Elf_Internal_Phdr *src; | |
350 | Elf_External_Phdr *dst; | |
244ffee7 JK |
351 | { |
352 | /* note that all elements of dst are *arrays of unsigned char* already... */ | |
353 | bfd_h_put_32 (abfd, src->p_type, dst->p_type); | |
94dbb655 KR |
354 | put_word (abfd, src->p_offset, dst->p_offset); |
355 | put_word (abfd, src->p_vaddr, dst->p_vaddr); | |
356 | put_word (abfd, src->p_paddr, dst->p_paddr); | |
357 | put_word (abfd, src->p_filesz, dst->p_filesz); | |
358 | put_word (abfd, src->p_memsz, dst->p_memsz); | |
244ffee7 | 359 | bfd_h_put_32 (abfd, src->p_flags, dst->p_flags); |
94dbb655 | 360 | put_word (abfd, src->p_align, dst->p_align); |
244ffee7 JK |
361 | } |
362 | ||
363 | /* Translate an ELF reloc from external format to internal format. */ | |
013dec1a | 364 | INLINE void |
1c6042ee ILT |
365 | elf_swap_reloc_in (abfd, src, dst) |
366 | bfd *abfd; | |
367 | Elf_External_Rel *src; | |
368 | Elf_Internal_Rel *dst; | |
244ffee7 | 369 | { |
94dbb655 KR |
370 | dst->r_offset = get_word (abfd, (bfd_byte *) src->r_offset); |
371 | dst->r_info = get_word (abfd, (bfd_byte *) src->r_info); | |
244ffee7 JK |
372 | } |
373 | ||
013dec1a | 374 | INLINE void |
1c6042ee ILT |
375 | elf_swap_reloca_in (abfd, src, dst) |
376 | bfd *abfd; | |
377 | Elf_External_Rela *src; | |
378 | Elf_Internal_Rela *dst; | |
244ffee7 | 379 | { |
94dbb655 KR |
380 | dst->r_offset = get_word (abfd, (bfd_byte *) src->r_offset); |
381 | dst->r_info = get_word (abfd, (bfd_byte *) src->r_info); | |
382 | dst->r_addend = get_word (abfd, (bfd_byte *) src->r_addend); | |
244ffee7 JK |
383 | } |
384 | ||
385 | /* Translate an ELF reloc from internal format to external format. */ | |
013dec1a | 386 | INLINE void |
1c6042ee ILT |
387 | elf_swap_reloc_out (abfd, src, dst) |
388 | bfd *abfd; | |
389 | Elf_Internal_Rel *src; | |
390 | Elf_External_Rel *dst; | |
244ffee7 | 391 | { |
94dbb655 KR |
392 | put_word (abfd, src->r_offset, dst->r_offset); |
393 | put_word (abfd, src->r_info, dst->r_info); | |
244ffee7 JK |
394 | } |
395 | ||
013dec1a | 396 | INLINE void |
1c6042ee ILT |
397 | elf_swap_reloca_out (abfd, src, dst) |
398 | bfd *abfd; | |
399 | Elf_Internal_Rela *src; | |
400 | Elf_External_Rela *dst; | |
244ffee7 | 401 | { |
94dbb655 KR |
402 | put_word (abfd, src->r_offset, dst->r_offset); |
403 | put_word (abfd, src->r_info, dst->r_info); | |
404 | put_word (abfd, src->r_addend, dst->r_addend); | |
244ffee7 | 405 | } |
32090b8e | 406 | |
013dec1a ILT |
407 | INLINE void |
408 | elf_swap_dyn_in (abfd, src, dst) | |
409 | bfd *abfd; | |
410 | const Elf_External_Dyn *src; | |
411 | Elf_Internal_Dyn *dst; | |
412 | { | |
413 | dst->d_tag = get_word (abfd, src->d_tag); | |
414 | dst->d_un.d_val = get_word (abfd, src->d_un.d_val); | |
415 | } | |
1c6042ee | 416 | |
013dec1a ILT |
417 | INLINE void |
418 | elf_swap_dyn_out (abfd, src, dst) | |
419 | bfd *abfd; | |
420 | const Elf_Internal_Dyn *src; | |
421 | Elf_External_Dyn *dst; | |
422 | { | |
423 | put_word (abfd, src->d_tag, dst->d_tag); | |
424 | put_word (abfd, src->d_un.d_val, dst->d_un.d_val); | |
425 | } | |
426 | \f | |
32090b8e KR |
427 | /* String table creation/manipulation routines */ |
428 | ||
429 | static struct strtab * | |
1c6042ee ILT |
430 | bfd_new_strtab (abfd) |
431 | bfd *abfd; | |
32090b8e KR |
432 | { |
433 | struct strtab *ss; | |
434 | ||
b9d5cdf0 DM |
435 | ss = (struct strtab *) malloc (sizeof (struct strtab)); |
436 | if (!ss) | |
437 | { | |
d1ad85a6 | 438 | bfd_set_error (bfd_error_no_memory); |
b9d5cdf0 DM |
439 | return NULL; |
440 | } | |
441 | ss->tab = malloc (1); | |
442 | if (!ss->tab) | |
443 | { | |
d1ad85a6 | 444 | bfd_set_error (bfd_error_no_memory); |
b9d5cdf0 DM |
445 | return NULL; |
446 | } | |
32090b8e KR |
447 | *ss->tab = 0; |
448 | ss->nentries = 0; | |
449 | ss->length = 1; | |
244ffee7 | 450 | |
32090b8e KR |
451 | return ss; |
452 | } | |
453 | ||
6ec3bb6a | 454 | static unsigned long |
1c6042ee ILT |
455 | bfd_add_to_strtab (abfd, ss, str) |
456 | bfd *abfd; | |
457 | struct strtab *ss; | |
6ec3bb6a | 458 | const char *str; |
32090b8e KR |
459 | { |
460 | /* should search first, but for now: */ | |
461 | /* include the trailing NUL */ | |
462 | int ln = strlen (str) + 1; | |
463 | ||
6ec3bb6a ILT |
464 | /* FIXME: This is slow. Also, we could combine this with the a.out |
465 | string table building and use a hash table, although it might not | |
466 | be worth it since ELF symbols don't include debugging information | |
467 | and thus have much less overlap. */ | |
32090b8e | 468 | ss->tab = realloc (ss->tab, ss->length + ln); |
6ec3bb6a ILT |
469 | if (ss->tab == NULL) |
470 | { | |
471 | bfd_set_error (bfd_error_no_memory); | |
472 | return (unsigned long) -1; | |
473 | } | |
32090b8e | 474 | |
32090b8e KR |
475 | strcpy (ss->tab + ss->length, str); |
476 | ss->nentries++; | |
477 | ss->length += ln; | |
478 | ||
479 | return ss->length - ln; | |
480 | } | |
481 | ||
482 | static int | |
1c6042ee ILT |
483 | bfd_add_2_to_strtab (abfd, ss, str, str2) |
484 | bfd *abfd; | |
485 | struct strtab *ss; | |
486 | char *str; | |
487 | CONST char *str2; | |
244ffee7 | 488 | { |
32090b8e KR |
489 | /* should search first, but for now: */ |
490 | /* include the trailing NUL */ | |
491 | int ln = strlen (str) + strlen (str2) + 1; | |
492 | ||
493 | /* should this be using obstacks? */ | |
494 | if (ss->length) | |
495 | ss->tab = realloc (ss->tab, ss->length + ln); | |
496 | else | |
b9d5cdf0 | 497 | ss->tab = malloc (ln); |
32090b8e | 498 | |
9783e04a | 499 | BFD_ASSERT (ss->tab != 0); /* FIXME */ |
32090b8e KR |
500 | strcpy (ss->tab + ss->length, str); |
501 | strcpy (ss->tab + ss->length + strlen (str), str2); | |
502 | ss->nentries++; | |
503 | ss->length += ln; | |
504 | ||
505 | return ss->length - ln; | |
244ffee7 | 506 | } |
32090b8e KR |
507 | \f |
508 | /* ELF .o/exec file reading */ | |
509 | ||
510 | /* Create a new bfd section from an ELF section header. */ | |
511 | ||
244ffee7 | 512 | static boolean |
1c6042ee ILT |
513 | bfd_section_from_shdr (abfd, shindex) |
514 | bfd *abfd; | |
515 | unsigned int shindex; | |
244ffee7 | 516 | { |
32090b8e KR |
517 | Elf_Internal_Shdr *hdr = elf_elfsections (abfd)[shindex]; |
518 | Elf_Internal_Ehdr *ehdr = elf_elfheader (abfd); | |
244ffee7 JK |
519 | char *name; |
520 | ||
521 | name = elf_string_from_elf_strtab (abfd, hdr->sh_name); | |
522 | ||
523 | switch (hdr->sh_type) | |
524 | { | |
244ffee7 | 525 | case SHT_NULL: |
497c5434 | 526 | /* Inactive section. Throw it away. */ |
244ffee7 JK |
527 | return true; |
528 | ||
497c5434 ILT |
529 | case SHT_PROGBITS: /* Normal section with contents. */ |
530 | case SHT_DYNAMIC: /* Dynamic linking information. */ | |
531 | case SHT_NOBITS: /* .bss section. */ | |
fa15568a | 532 | case SHT_HASH: /* .hash section. */ |
497c5434 | 533 | return _bfd_elf_make_section_from_shdr (abfd, hdr, name); |
244ffee7 JK |
534 | |
535 | case SHT_SYMTAB: /* A symbol table */ | |
32090b8e KR |
536 | if (elf_onesymtab (abfd) == shindex) |
537 | return true; | |
538 | ||
244ffee7 | 539 | BFD_ASSERT (hdr->sh_entsize == sizeof (Elf_External_Sym)); |
32090b8e | 540 | BFD_ASSERT (elf_onesymtab (abfd) == 0); |
244ffee7 | 541 | elf_onesymtab (abfd) = shindex; |
1c6042ee ILT |
542 | elf_tdata (abfd)->symtab_hdr = *hdr; |
543 | elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->symtab_hdr; | |
244ffee7 JK |
544 | abfd->flags |= HAS_SYMS; |
545 | return true; | |
546 | ||
cb71adf1 PS |
547 | case SHT_DYNSYM: /* A dynamic symbol table */ |
548 | if (elf_dynsymtab (abfd) == shindex) | |
549 | return true; | |
550 | ||
551 | BFD_ASSERT (hdr->sh_entsize == sizeof (Elf_External_Sym)); | |
552 | BFD_ASSERT (elf_dynsymtab (abfd) == 0); | |
553 | elf_dynsymtab (abfd) = shindex; | |
554 | elf_tdata (abfd)->dynsymtab_hdr = *hdr; | |
555 | elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->dynsymtab_hdr; | |
556 | abfd->flags |= HAS_SYMS; | |
fa15568a ILT |
557 | |
558 | /* Besides being a symbol table, we also treat this as a regular | |
559 | section, so that objcopy can handle it. */ | |
560 | return _bfd_elf_make_section_from_shdr (abfd, hdr, name); | |
cb71adf1 | 561 | |
244ffee7 | 562 | case SHT_STRTAB: /* A string table */ |
497c5434 | 563 | if (hdr->rawdata != NULL) |
fce36137 | 564 | return true; |
32090b8e KR |
565 | if (ehdr->e_shstrndx == shindex) |
566 | { | |
1c6042ee ILT |
567 | elf_tdata (abfd)->shstrtab_hdr = *hdr; |
568 | elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->shstrtab_hdr; | |
569 | hdr->rawdata = (PTR) & elf_tdata (abfd)->shstrtab_hdr; | |
32090b8e KR |
570 | return true; |
571 | } | |
572 | { | |
68241b2b | 573 | unsigned int i; |
fce36137 | 574 | |
32090b8e KR |
575 | for (i = 1; i < ehdr->e_shnum; i++) |
576 | { | |
1c6042ee | 577 | Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i]; |
32090b8e KR |
578 | if (hdr2->sh_link == shindex) |
579 | { | |
2e03ce18 ILT |
580 | if (! bfd_section_from_shdr (abfd, i)) |
581 | return false; | |
32090b8e KR |
582 | if (elf_onesymtab (abfd) == i) |
583 | { | |
1c6042ee | 584 | elf_tdata (abfd)->strtab_hdr = *hdr; |
fa15568a ILT |
585 | elf_elfsections (abfd)[shindex] = |
586 | &elf_tdata (abfd)->strtab_hdr; | |
32090b8e KR |
587 | return true; |
588 | } | |
cb71adf1 PS |
589 | if (elf_dynsymtab (abfd) == i) |
590 | { | |
591 | elf_tdata (abfd)->dynstrtab_hdr = *hdr; | |
fa15568a ILT |
592 | elf_elfsections (abfd)[shindex] = |
593 | &elf_tdata (abfd)->dynstrtab_hdr; | |
594 | /* We also treat this as a regular section, so | |
595 | that objcopy can handle it. */ | |
596 | break; | |
cb71adf1 | 597 | } |
2e03ce18 | 598 | #if 0 /* Not handling other string tables specially right now. */ |
1c6042ee | 599 | hdr2 = elf_elfsections (abfd)[i]; /* in case it moved */ |
32090b8e KR |
600 | /* We have a strtab for some random other section. */ |
601 | newsect = (asection *) hdr2->rawdata; | |
602 | if (!newsect) | |
603 | break; | |
604 | hdr->rawdata = (PTR) newsect; | |
605 | hdr2 = &elf_section_data (newsect)->str_hdr; | |
606 | *hdr2 = *hdr; | |
1c6042ee | 607 | elf_elfsections (abfd)[shindex] = hdr2; |
32090b8e KR |
608 | #endif |
609 | } | |
610 | } | |
611 | } | |
612 | ||
497c5434 | 613 | return _bfd_elf_make_section_from_shdr (abfd, hdr, name); |
244ffee7 JK |
614 | |
615 | case SHT_REL: | |
616 | case SHT_RELA: | |
497c5434 | 617 | /* *These* do a lot of work -- but build no sections! */ |
244ffee7 JK |
618 | { |
619 | asection *target_sect; | |
32090b8e | 620 | Elf_Internal_Shdr *hdr2; |
244ffee7 JK |
621 | int use_rela_p = get_elf_backend_data (abfd)->use_rela_p; |
622 | ||
497c5434 ILT |
623 | /* Get the symbol table. */ |
624 | if (! bfd_section_from_shdr (abfd, hdr->sh_link)) | |
625 | return false; | |
626 | ||
e6667b2b ILT |
627 | /* If this reloc section does not use the main symbol table we |
628 | don't treat it as a reloc section. BFD can't adequately | |
629 | represent such a section, so at least for now, we don't | |
630 | try. We just present it as a normal section. */ | |
631 | if (hdr->sh_link != elf_onesymtab (abfd)) | |
497c5434 ILT |
632 | return _bfd_elf_make_section_from_shdr (abfd, hdr, name); |
633 | ||
244ffee7 JK |
634 | /* Don't allow REL relocations on a machine that uses RELA and |
635 | vice versa. */ | |
636 | /* @@ Actually, the generic ABI does suggest that both might be | |
637 | used in one file. But the four ABI Processor Supplements I | |
638 | have access to right now all specify that only one is used on | |
639 | each of those architectures. It's conceivable that, e.g., a | |
640 | bunch of absolute 32-bit relocs might be more compact in REL | |
641 | form even on a RELA machine... */ | |
497c5434 ILT |
642 | BFD_ASSERT (use_rela_p |
643 | ? (hdr->sh_type == SHT_RELA | |
644 | && hdr->sh_entsize == sizeof (Elf_External_Rela)) | |
645 | : (hdr->sh_type == SHT_REL | |
646 | && hdr->sh_entsize == sizeof (Elf_External_Rel))); | |
647 | ||
648 | if (! bfd_section_from_shdr (abfd, hdr->sh_info)) | |
2e03ce18 | 649 | return false; |
244ffee7 | 650 | target_sect = section_from_elf_index (abfd, hdr->sh_info); |
062189c6 ILT |
651 | if (target_sect == NULL |
652 | || elf_section_data (target_sect) == NULL) | |
244ffee7 JK |
653 | return false; |
654 | ||
32090b8e KR |
655 | hdr2 = &elf_section_data (target_sect)->rel_hdr; |
656 | *hdr2 = *hdr; | |
1c6042ee | 657 | elf_elfsections (abfd)[shindex] = hdr2; |
244ffee7 JK |
658 | target_sect->reloc_count = hdr->sh_size / hdr->sh_entsize; |
659 | target_sect->flags |= SEC_RELOC; | |
497c5434 | 660 | target_sect->relocation = NULL; |
244ffee7 | 661 | target_sect->rel_filepos = hdr->sh_offset; |
32090b8e | 662 | abfd->flags |= HAS_RELOC; |
244ffee7 JK |
663 | return true; |
664 | } | |
665 | break; | |
666 | ||
244ffee7 JK |
667 | case SHT_NOTE: |
668 | #if 0 | |
669 | fprintf (stderr, "Note Sections not yet supported.\n"); | |
670 | BFD_FAIL (); | |
671 | #endif | |
672 | break; | |
673 | ||
674 | case SHT_SHLIB: | |
675 | #if 0 | |
676 | fprintf (stderr, "SHLIB Sections not supported (and non conforming.)\n"); | |
677 | #endif | |
678 | return true; | |
679 | ||
680 | default: | |
e621c5cc ILT |
681 | /* Check for any processor-specific section types. */ |
682 | { | |
683 | struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
684 | ||
685 | if (bed->elf_backend_section_from_shdr) | |
686 | (*bed->elf_backend_section_from_shdr) (abfd, hdr, name); | |
687 | } | |
244ffee7 JK |
688 | break; |
689 | } | |
690 | ||
691 | return true; | |
692 | } | |
693 | ||
fce36137 | 694 | boolean |
1c6042ee ILT |
695 | elf_new_section_hook (abfd, sec) |
696 | bfd *abfd | |
697 | ; | |
698 | asection *sec; | |
fce36137 | 699 | { |
32090b8e | 700 | struct bfd_elf_section_data *sdata; |
300adb31 KR |
701 | |
702 | sdata = (struct bfd_elf_section_data *) bfd_alloc (abfd, sizeof (*sdata)); | |
9783e04a DM |
703 | if (!sdata) |
704 | { | |
d1ad85a6 | 705 | bfd_set_error (bfd_error_no_memory); |
9783e04a DM |
706 | return false; |
707 | } | |
300adb31 | 708 | sec->used_by_bfd = (PTR) sdata; |
32090b8e | 709 | memset (sdata, 0, sizeof (*sdata)); |
244ffee7 JK |
710 | return true; |
711 | } | |
712 | ||
713 | /* Create a new bfd section from an ELF program header. | |
714 | ||
715 | Since program segments have no names, we generate a synthetic name | |
716 | of the form segment<NUM>, where NUM is generally the index in the | |
717 | program header table. For segments that are split (see below) we | |
718 | generate the names segment<NUM>a and segment<NUM>b. | |
719 | ||
720 | Note that some program segments may have a file size that is different than | |
721 | (less than) the memory size. All this means is that at execution the | |
722 | system must allocate the amount of memory specified by the memory size, | |
723 | but only initialize it with the first "file size" bytes read from the | |
724 | file. This would occur for example, with program segments consisting | |
725 | of combined data+bss. | |
726 | ||
727 | To handle the above situation, this routine generates TWO bfd sections | |
728 | for the single program segment. The first has the length specified by | |
729 | the file size of the segment, and the second has the length specified | |
730 | by the difference between the two sizes. In effect, the segment is split | |
731 | into it's initialized and uninitialized parts. | |
732 | ||
733 | */ | |
734 | ||
735 | static boolean | |
1c6042ee ILT |
736 | bfd_section_from_phdr (abfd, hdr, index) |
737 | bfd *abfd; | |
738 | Elf_Internal_Phdr *hdr; | |
739 | int index; | |
244ffee7 JK |
740 | { |
741 | asection *newsect; | |
742 | char *name; | |
743 | char namebuf[64]; | |
744 | int split; | |
745 | ||
746 | split = ((hdr->p_memsz > 0) && | |
747 | (hdr->p_filesz > 0) && | |
748 | (hdr->p_memsz > hdr->p_filesz)); | |
749 | sprintf (namebuf, split ? "segment%da" : "segment%d", index); | |
750 | name = bfd_alloc (abfd, strlen (namebuf) + 1); | |
9783e04a DM |
751 | if (!name) |
752 | { | |
d1ad85a6 | 753 | bfd_set_error (bfd_error_no_memory); |
9783e04a DM |
754 | return false; |
755 | } | |
244ffee7 JK |
756 | strcpy (name, namebuf); |
757 | newsect = bfd_make_section (abfd, name); | |
2e03ce18 ILT |
758 | if (newsect == NULL) |
759 | return false; | |
244ffee7 JK |
760 | newsect->vma = hdr->p_vaddr; |
761 | newsect->_raw_size = hdr->p_filesz; | |
762 | newsect->filepos = hdr->p_offset; | |
763 | newsect->flags |= SEC_HAS_CONTENTS; | |
764 | if (hdr->p_type == PT_LOAD) | |
765 | { | |
766 | newsect->flags |= SEC_ALLOC; | |
767 | newsect->flags |= SEC_LOAD; | |
768 | if (hdr->p_flags & PF_X) | |
769 | { | |
770 | /* FIXME: all we known is that it has execute PERMISSION, | |
771 | may be data. */ | |
772 | newsect->flags |= SEC_CODE; | |
773 | } | |
774 | } | |
775 | if (!(hdr->p_flags & PF_W)) | |
776 | { | |
777 | newsect->flags |= SEC_READONLY; | |
778 | } | |
779 | ||
780 | if (split) | |
781 | { | |
782 | sprintf (namebuf, "segment%db", index); | |
783 | name = bfd_alloc (abfd, strlen (namebuf) + 1); | |
9783e04a DM |
784 | if (!name) |
785 | { | |
d1ad85a6 | 786 | bfd_set_error (bfd_error_no_memory); |
9783e04a DM |
787 | return false; |
788 | } | |
244ffee7 JK |
789 | strcpy (name, namebuf); |
790 | newsect = bfd_make_section (abfd, name); | |
2e03ce18 ILT |
791 | if (newsect == NULL) |
792 | return false; | |
244ffee7 JK |
793 | newsect->vma = hdr->p_vaddr + hdr->p_filesz; |
794 | newsect->_raw_size = hdr->p_memsz - hdr->p_filesz; | |
795 | if (hdr->p_type == PT_LOAD) | |
796 | { | |
797 | newsect->flags |= SEC_ALLOC; | |
798 | if (hdr->p_flags & PF_X) | |
799 | newsect->flags |= SEC_CODE; | |
800 | } | |
801 | if (!(hdr->p_flags & PF_W)) | |
802 | newsect->flags |= SEC_READONLY; | |
803 | } | |
804 | ||
805 | return true; | |
806 | } | |
807 | ||
32090b8e | 808 | /* Begin processing a given object. |
244ffee7 | 809 | |
32090b8e KR |
810 | First we validate the file by reading in the ELF header and checking |
811 | the magic number. */ | |
812 | ||
813 | static INLINE boolean | |
1c6042ee ILT |
814 | elf_file_p (x_ehdrp) |
815 | Elf_External_Ehdr *x_ehdrp; | |
244ffee7 | 816 | { |
32090b8e KR |
817 | return ((x_ehdrp->e_ident[EI_MAG0] == ELFMAG0) |
818 | && (x_ehdrp->e_ident[EI_MAG1] == ELFMAG1) | |
819 | && (x_ehdrp->e_ident[EI_MAG2] == ELFMAG2) | |
820 | && (x_ehdrp->e_ident[EI_MAG3] == ELFMAG3)); | |
821 | } | |
244ffee7 | 822 | |
d24928c0 KR |
823 | /* Check to see if the file associated with ABFD matches the target vector |
824 | that ABFD points to. | |
825 | ||
826 | Note that we may be called several times with the same ABFD, but different | |
827 | target vectors, most of which will not match. We have to avoid leaving | |
828 | any side effects in ABFD, or any data it points to (like tdata), if the | |
6ec3bb6a | 829 | file does not match the target vector. */ |
d24928c0 | 830 | |
2f3508ad | 831 | const bfd_target * |
1c6042ee ILT |
832 | elf_object_p (abfd) |
833 | bfd *abfd; | |
244ffee7 | 834 | { |
32090b8e KR |
835 | Elf_External_Ehdr x_ehdr; /* Elf file header, external form */ |
836 | Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */ | |
837 | Elf_External_Shdr x_shdr; /* Section header table entry, external form */ | |
6ec3bb6a | 838 | Elf_Internal_Shdr *i_shdrp = NULL; /* Section header table, internal form */ |
68241b2b | 839 | unsigned int shindex; |
32090b8e | 840 | char *shstrtab; /* Internal copy of section header stringtab */ |
062189c6 | 841 | struct elf_backend_data *ebd; |
d24928c0 | 842 | struct elf_obj_tdata *preserved_tdata = elf_tdata (abfd); |
6ec3bb6a | 843 | struct elf_obj_tdata *new_tdata = NULL; |
244ffee7 | 844 | |
32090b8e KR |
845 | /* Read in the ELF header in external format. */ |
846 | ||
847 | if (bfd_read ((PTR) & x_ehdr, sizeof (x_ehdr), 1, abfd) != sizeof (x_ehdr)) | |
25057836 JL |
848 | { |
849 | if (bfd_get_error () != bfd_error_system_call) | |
850 | goto got_wrong_format_error; | |
851 | else | |
852 | goto got_no_match; | |
853 | } | |
244ffee7 | 854 | |
32090b8e KR |
855 | /* Now check to see if we have a valid ELF file, and one that BFD can |
856 | make use of. The magic number must match, the address size ('class') | |
857 | and byte-swapping must match our XVEC entry, and it must have a | |
858 | section header table (FIXME: See comments re sections at top of this | |
859 | file). */ | |
244ffee7 | 860 | |
d24928c0 KR |
861 | if ((elf_file_p (&x_ehdr) == false) || |
862 | (x_ehdr.e_ident[EI_VERSION] != EV_CURRENT) || | |
863 | (x_ehdr.e_ident[EI_CLASS] != ELFCLASS)) | |
864 | goto got_wrong_format_error; | |
244ffee7 | 865 | |
d24928c0 | 866 | /* Check that file's byte order matches xvec's */ |
32090b8e | 867 | switch (x_ehdr.e_ident[EI_DATA]) |
244ffee7 | 868 | { |
32090b8e KR |
869 | case ELFDATA2MSB: /* Big-endian */ |
870 | if (!abfd->xvec->header_byteorder_big_p) | |
d24928c0 | 871 | goto got_wrong_format_error; |
32090b8e KR |
872 | break; |
873 | case ELFDATA2LSB: /* Little-endian */ | |
874 | if (abfd->xvec->header_byteorder_big_p) | |
d24928c0 | 875 | goto got_wrong_format_error; |
32090b8e KR |
876 | break; |
877 | case ELFDATANONE: /* No data encoding specified */ | |
878 | default: /* Unknown data encoding specified */ | |
d24928c0 | 879 | goto got_wrong_format_error; |
244ffee7 | 880 | } |
244ffee7 | 881 | |
32090b8e | 882 | /* Allocate an instance of the elf_obj_tdata structure and hook it up to |
6ec3bb6a | 883 | the tdata pointer in the bfd. */ |
244ffee7 | 884 | |
6ec3bb6a ILT |
885 | new_tdata = ((struct elf_obj_tdata *) |
886 | bfd_zalloc (abfd, sizeof (struct elf_obj_tdata))); | |
887 | if (new_tdata == NULL) | |
d24928c0 | 888 | goto got_no_memory_error; |
6ec3bb6a | 889 | elf_tdata (abfd) = new_tdata; |
244ffee7 | 890 | |
32090b8e KR |
891 | /* Now that we know the byte order, swap in the rest of the header */ |
892 | i_ehdrp = elf_elfheader (abfd); | |
893 | elf_swap_ehdr_in (abfd, &x_ehdr, i_ehdrp); | |
894 | #if DEBUG & 1 | |
895 | elf_debug_file (i_ehdrp); | |
244ffee7 JK |
896 | #endif |
897 | ||
32090b8e KR |
898 | /* If there is no section header table, we're hosed. */ |
899 | if (i_ehdrp->e_shoff == 0) | |
d24928c0 | 900 | goto got_wrong_format_error; |
244ffee7 | 901 | |
062189c6 ILT |
902 | /* As a simple sanity check, verify that the what BFD thinks is the |
903 | size of each section header table entry actually matches the size | |
904 | recorded in the file. */ | |
905 | if (i_ehdrp->e_shentsize != sizeof (x_shdr)) | |
906 | goto got_wrong_format_error; | |
907 | ||
908 | ebd = get_elf_backend_data (abfd); | |
909 | ||
910 | /* Check that the ELF e_machine field matches what this particular | |
911 | BFD format expects. */ | |
912 | if (ebd->elf_machine_code != i_ehdrp->e_machine) | |
913 | { | |
2f3508ad | 914 | const bfd_target * const *target_ptr; |
062189c6 ILT |
915 | |
916 | if (ebd->elf_machine_code != EM_NONE) | |
917 | goto got_wrong_format_error; | |
918 | ||
919 | /* This is the generic ELF target. Let it match any ELF target | |
920 | for which we do not have a specific backend. */ | |
f4bd7a8f | 921 | for (target_ptr = bfd_target_vector; *target_ptr != NULL; target_ptr++) |
062189c6 ILT |
922 | { |
923 | struct elf_backend_data *back; | |
924 | ||
925 | if ((*target_ptr)->flavour != bfd_target_elf_flavour) | |
926 | continue; | |
927 | back = (struct elf_backend_data *) (*target_ptr)->backend_data; | |
928 | if (back->elf_machine_code == i_ehdrp->e_machine) | |
929 | { | |
930 | /* target_ptr is an ELF backend which matches this | |
931 | object file, so reject the generic ELF target. */ | |
932 | goto got_wrong_format_error; | |
933 | } | |
934 | } | |
935 | } | |
936 | ||
7b8106b4 | 937 | if (i_ehdrp->e_type == ET_EXEC) |
32090b8e | 938 | abfd->flags |= EXEC_P; |
7b8106b4 ILT |
939 | else if (i_ehdrp->e_type == ET_DYN) |
940 | abfd->flags |= DYNAMIC; | |
244ffee7 | 941 | |
fa15568a ILT |
942 | if (i_ehdrp->e_phnum > 0) |
943 | abfd->flags |= D_PAGED; | |
944 | ||
6ec3bb6a ILT |
945 | if (! bfd_default_set_arch_mach (abfd, ebd->arch, 0)) |
946 | goto got_no_match; | |
32090b8e | 947 | |
062189c6 ILT |
948 | /* Remember the entry point specified in the ELF file header. */ |
949 | bfd_get_start_address (abfd) = i_ehdrp->e_entry; | |
32090b8e KR |
950 | |
951 | /* Allocate space for a copy of the section header table in | |
952 | internal form, seek to the section header table in the file, | |
062189c6 | 953 | read it in, and convert it to internal form. */ |
6ec3bb6a ILT |
954 | i_shdrp = ((Elf_Internal_Shdr *) |
955 | bfd_alloc (abfd, sizeof (*i_shdrp) * i_ehdrp->e_shnum)); | |
956 | elf_elfsections (abfd) = ((Elf_Internal_Shdr **) | |
957 | bfd_alloc (abfd, | |
958 | sizeof (i_shdrp) * i_ehdrp->e_shnum)); | |
1c6042ee | 959 | if (!i_shdrp || !elf_elfsections (abfd)) |
d24928c0 | 960 | goto got_no_memory_error; |
6ec3bb6a | 961 | if (bfd_seek (abfd, i_ehdrp->e_shoff, SEEK_SET) != 0) |
25057836 | 962 | goto got_no_match; |
32090b8e | 963 | for (shindex = 0; shindex < i_ehdrp->e_shnum; shindex++) |
244ffee7 | 964 | { |
d24928c0 | 965 | if (bfd_read ((PTR) & x_shdr, sizeof x_shdr, 1, abfd) != sizeof (x_shdr)) |
25057836 | 966 | goto got_no_match; |
32090b8e | 967 | elf_swap_shdr_in (abfd, &x_shdr, i_shdrp + shindex); |
1c6042ee | 968 | elf_elfsections (abfd)[shindex] = i_shdrp + shindex; |
244ffee7 | 969 | } |
32090b8e | 970 | if (i_ehdrp->e_shstrndx) |
244ffee7 | 971 | { |
2e03ce18 ILT |
972 | if (! bfd_section_from_shdr (abfd, i_ehdrp->e_shstrndx)) |
973 | goto got_no_match; | |
244ffee7 JK |
974 | } |
975 | ||
32090b8e KR |
976 | /* Read in the string table containing the names of the sections. We |
977 | will need the base pointer to this table later. */ | |
978 | /* We read this inline now, so that we don't have to go through | |
979 | bfd_section_from_shdr with it (since this particular strtab is | |
980 | used to find all of the ELF section names.) */ | |
244ffee7 | 981 | |
32090b8e KR |
982 | shstrtab = elf_get_str_section (abfd, i_ehdrp->e_shstrndx); |
983 | if (!shstrtab) | |
6ec3bb6a | 984 | goto got_no_match; |
244ffee7 | 985 | |
32090b8e KR |
986 | /* Once all of the section headers have been read and converted, we |
987 | can start processing them. Note that the first section header is | |
6ec3bb6a | 988 | a dummy placeholder entry, so we ignore it. */ |
244ffee7 | 989 | |
32090b8e KR |
990 | for (shindex = 1; shindex < i_ehdrp->e_shnum; shindex++) |
991 | { | |
2e03ce18 ILT |
992 | if (! bfd_section_from_shdr (abfd, shindex)) |
993 | goto got_no_match; | |
32090b8e | 994 | } |
244ffee7 | 995 | |
5315c428 ILT |
996 | /* Let the backend double check the format and override global |
997 | information. */ | |
998 | if (ebd->elf_backend_object_p) | |
999 | { | |
1000 | if ((*ebd->elf_backend_object_p) (abfd) == false) | |
1001 | goto got_wrong_format_error; | |
1002 | } | |
1003 | ||
d24928c0 KR |
1004 | return (abfd->xvec); |
1005 | ||
1c6042ee | 1006 | got_wrong_format_error: |
d1ad85a6 | 1007 | bfd_set_error (bfd_error_wrong_format); |
d24928c0 | 1008 | goto got_no_match; |
1c6042ee | 1009 | got_no_memory_error: |
d1ad85a6 | 1010 | bfd_set_error (bfd_error_no_memory); |
d24928c0 | 1011 | goto got_no_match; |
1c6042ee | 1012 | got_no_match: |
6ec3bb6a ILT |
1013 | if (new_tdata != NULL |
1014 | && new_tdata->elf_sect_ptr != NULL) | |
1015 | bfd_release (abfd, new_tdata->elf_sect_ptr); | |
1016 | if (i_shdrp != NULL) | |
1017 | bfd_release (abfd, i_shdrp); | |
1018 | if (new_tdata != NULL) | |
1019 | bfd_release (abfd, new_tdata); | |
d24928c0 KR |
1020 | elf_tdata (abfd) = preserved_tdata; |
1021 | return (NULL); | |
32090b8e | 1022 | } |
32090b8e | 1023 | \f |
1c6042ee | 1024 | |
32090b8e KR |
1025 | /* ELF .o/exec file writing */ |
1026 | ||
d24928c0 KR |
1027 | /* Takes a bfd and a symbol, returns a pointer to the elf specific area |
1028 | of the symbol if there is one. */ | |
32090b8e | 1029 | static INLINE elf_symbol_type * |
1c6042ee ILT |
1030 | elf_symbol_from (ignore_abfd, symbol) |
1031 | bfd *ignore_abfd; | |
1032 | asymbol *symbol; | |
244ffee7 | 1033 | { |
32090b8e KR |
1034 | if (symbol->the_bfd->xvec->flavour != bfd_target_elf_flavour) |
1035 | return 0; | |
1036 | ||
1037 | if (symbol->the_bfd->tdata.elf_obj_data == (struct elf_obj_tdata *) NULL) | |
1038 | return 0; | |
1039 | ||
1040 | return (elf_symbol_type *) symbol; | |
244ffee7 JK |
1041 | } |
1042 | ||
32090b8e KR |
1043 | void |
1044 | write_relocs (abfd, sec, xxx) | |
1045 | bfd *abfd; | |
1046 | asection *sec; | |
1047 | PTR xxx; | |
1048 | { | |
1049 | Elf_Internal_Shdr *rela_hdr; | |
1050 | Elf_External_Rela *outbound_relocas; | |
1051 | Elf_External_Rel *outbound_relocs; | |
1052 | int idx; | |
1053 | int use_rela_p = get_elf_backend_data (abfd)->use_rela_p; | |
300adb31 | 1054 | asymbol *last_sym = 0; |
38a5f510 | 1055 | int last_sym_idx = 9999999; /* should always be written before use */ |
244ffee7 | 1056 | |
32090b8e KR |
1057 | if ((sec->flags & SEC_RELOC) == 0) |
1058 | return; | |
6ec3bb6a ILT |
1059 | |
1060 | /* The linker backend writes the relocs out itself, and sets the | |
1061 | reloc_count field to zero to inhibit writing them here. Also, | |
1062 | sometimes the SEC_RELOC flag gets set even when there aren't any | |
1063 | relocs. */ | |
32090b8e KR |
1064 | if (sec->reloc_count == 0) |
1065 | return; | |
244ffee7 | 1066 | |
32090b8e | 1067 | rela_hdr = &elf_section_data (sec)->rel_hdr; |
244ffee7 | 1068 | |
32090b8e KR |
1069 | rela_hdr->sh_size = rela_hdr->sh_entsize * sec->reloc_count; |
1070 | rela_hdr->contents = (void *) bfd_alloc (abfd, rela_hdr->sh_size); | |
9783e04a DM |
1071 | if (!rela_hdr->contents) |
1072 | { | |
d1ad85a6 | 1073 | bfd_set_error (bfd_error_no_memory); |
1c6042ee | 1074 | abort (); /* FIXME */ |
9783e04a | 1075 | } |
244ffee7 | 1076 | |
32090b8e | 1077 | /* orelocation has the data, reloc_count has the count... */ |
300adb31 KR |
1078 | if (use_rela_p) |
1079 | { | |
1080 | outbound_relocas = (Elf_External_Rela *) rela_hdr->contents; | |
1081 | ||
1082 | for (idx = 0; idx < sec->reloc_count; idx++) | |
32090b8e | 1083 | { |
300adb31 KR |
1084 | Elf_Internal_Rela dst_rela; |
1085 | Elf_External_Rela *src_rela; | |
1086 | arelent *ptr; | |
1087 | asymbol *sym; | |
1088 | int n; | |
1089 | ||
1090 | ptr = sec->orelocation[idx]; | |
1091 | src_rela = outbound_relocas + idx; | |
1092 | if (!(abfd->flags & EXEC_P)) | |
1093 | dst_rela.r_offset = ptr->address - sec->vma; | |
1094 | else | |
1095 | dst_rela.r_offset = ptr->address; | |
6a3eb9b6 | 1096 | |
300adb31 KR |
1097 | sym = *ptr->sym_ptr_ptr; |
1098 | if (sym == last_sym) | |
1099 | n = last_sym_idx; | |
1100 | else | |
32090b8e | 1101 | { |
300adb31 KR |
1102 | last_sym = sym; |
1103 | last_sym_idx = n = elf_symbol_from_bfd_symbol (abfd, &sym); | |
32090b8e | 1104 | } |
300adb31 KR |
1105 | dst_rela.r_info = ELF_R_INFO (n, ptr->howto->type); |
1106 | ||
1107 | dst_rela.r_addend = ptr->addend; | |
1108 | elf_swap_reloca_out (abfd, &dst_rela, src_rela); | |
244ffee7 | 1109 | } |
300adb31 KR |
1110 | } |
1111 | else | |
1112 | /* REL relocations */ | |
1113 | { | |
1114 | outbound_relocs = (Elf_External_Rel *) rela_hdr->contents; | |
1115 | ||
1116 | for (idx = 0; idx < sec->reloc_count; idx++) | |
32090b8e | 1117 | { |
300adb31 KR |
1118 | Elf_Internal_Rel dst_rel; |
1119 | Elf_External_Rel *src_rel; | |
1120 | arelent *ptr; | |
1121 | int n; | |
1122 | asymbol *sym; | |
1123 | ||
1124 | ptr = sec->orelocation[idx]; | |
1125 | sym = *ptr->sym_ptr_ptr; | |
1126 | src_rel = outbound_relocs + idx; | |
1127 | if (!(abfd->flags & EXEC_P)) | |
1128 | dst_rel.r_offset = ptr->address - sec->vma; | |
1129 | else | |
1130 | dst_rel.r_offset = ptr->address; | |
244ffee7 | 1131 | |
300adb31 KR |
1132 | if (sym == last_sym) |
1133 | n = last_sym_idx; | |
1134 | else | |
32090b8e | 1135 | { |
300adb31 KR |
1136 | last_sym = sym; |
1137 | last_sym_idx = n = elf_symbol_from_bfd_symbol (abfd, &sym); | |
32090b8e | 1138 | } |
300adb31 KR |
1139 | dst_rel.r_info = ELF_R_INFO (n, ptr->howto->type); |
1140 | ||
1141 | elf_swap_reloc_out (abfd, &dst_rel, src_rel); | |
32090b8e | 1142 | } |
300adb31 | 1143 | } |
32090b8e | 1144 | } |
244ffee7 | 1145 | |
fa15568a | 1146 | /* Set up an ELF internal section header for a section. */ |
244ffee7 | 1147 | |
fa15568a | 1148 | /*ARGSUSED*/ |
32090b8e | 1149 | static void |
fa15568a | 1150 | elf_fake_sections (abfd, asect, ignore) |
1c6042ee ILT |
1151 | bfd *abfd; |
1152 | asection *asect; | |
fa15568a | 1153 | PTR ignore; |
32090b8e | 1154 | { |
32090b8e | 1155 | Elf_Internal_Shdr *this_hdr; |
fa15568a | 1156 | |
32090b8e | 1157 | this_hdr = &elf_section_data (asect)->this_hdr; |
fa15568a ILT |
1158 | |
1159 | this_hdr->sh_name = bfd_add_to_strtab (abfd, elf_shstrtab (abfd), | |
1160 | asect->name); | |
6ec3bb6a ILT |
1161 | if (this_hdr->sh_name == (unsigned long) -1) |
1162 | abort (); /* FIXME */ | |
fa15568a ILT |
1163 | |
1164 | this_hdr->sh_flags = 0; | |
1165 | if ((asect->flags & SEC_ALLOC) != 0) | |
1166 | this_hdr->sh_addr = asect->vma; | |
1167 | else | |
1168 | this_hdr->sh_addr = 0; | |
1169 | this_hdr->sh_offset = 0; | |
1170 | this_hdr->sh_size = asect->_raw_size; | |
1171 | this_hdr->sh_link = 0; | |
1172 | this_hdr->sh_info = 0; | |
32090b8e | 1173 | this_hdr->sh_addralign = 1 << asect->alignment_power; |
fa15568a ILT |
1174 | this_hdr->sh_entsize = 0; |
1175 | ||
1176 | this_hdr->rawdata = (PTR) asect; | |
1177 | this_hdr->contents = NULL; | |
1178 | this_hdr->size = 0; | |
013dec1a ILT |
1179 | |
1180 | /* FIXME: This should not be based on section names. */ | |
1181 | if (strcmp (asect->name, ".dynstr") == 0) | |
1182 | this_hdr->sh_type = SHT_STRTAB; | |
1183 | else if (strcmp (asect->name, ".hash") == 0) | |
fa15568a ILT |
1184 | { |
1185 | this_hdr->sh_type = SHT_HASH; | |
1186 | this_hdr->sh_entsize = ARCH_SIZE / 8; | |
1187 | } | |
013dec1a | 1188 | else if (strcmp (asect->name, ".dynsym") == 0) |
fa15568a ILT |
1189 | { |
1190 | this_hdr->sh_type = SHT_DYNSYM; | |
1191 | this_hdr->sh_entsize = sizeof (Elf_External_Sym); | |
1192 | } | |
013dec1a | 1193 | else if (strcmp (asect->name, ".dynamic") == 0) |
fa15568a ILT |
1194 | { |
1195 | this_hdr->sh_type = SHT_DYNAMIC; | |
1196 | this_hdr->sh_entsize = sizeof (Elf_External_Dyn); | |
1197 | } | |
013dec1a | 1198 | else if (strncmp (asect->name, ".rel.", 5) == 0) |
fa15568a ILT |
1199 | { |
1200 | this_hdr->sh_type = SHT_REL; | |
1201 | this_hdr->sh_entsize = sizeof (Elf_External_Rel); | |
1202 | } | |
013dec1a | 1203 | else if (strncmp (asect->name, ".rela.", 6) == 0) |
fa15568a ILT |
1204 | { |
1205 | this_hdr->sh_type = SHT_RELA; | |
1206 | this_hdr->sh_entsize = sizeof (Elf_External_Rela); | |
1207 | } | |
1208 | else if (strcmp (asect->name, ".note") == 0) | |
1209 | this_hdr->sh_type = SHT_NOTE; | |
1210 | else if (strncmp (asect->name, ".stab", 5) == 0 | |
1211 | && strcmp (asect->name + strlen (asect->name) - 3, "str") == 0) | |
1212 | this_hdr->sh_type = SHT_STRTAB; | |
1213 | else if ((asect->flags & SEC_ALLOC) != 0 | |
1214 | && (asect->flags & SEC_LOAD) != 0) | |
32090b8e | 1215 | this_hdr->sh_type = SHT_PROGBITS; |
fa15568a ILT |
1216 | else if ((asect->flags & SEC_ALLOC) != 0 |
1217 | && ((asect->flags & SEC_LOAD) == 0)) | |
e621c5cc | 1218 | { |
6c35a16d ILT |
1219 | BFD_ASSERT (strcmp (asect->name, ".bss") == 0 |
1220 | || strcmp (asect->name, ".sbss") == 0); | |
e621c5cc ILT |
1221 | this_hdr->sh_type = SHT_NOBITS; |
1222 | } | |
32090b8e | 1223 | else |
fa15568a ILT |
1224 | { |
1225 | /* Who knows? */ | |
1226 | this_hdr->sh_type = SHT_PROGBITS; | |
1227 | } | |
32090b8e | 1228 | |
fa15568a ILT |
1229 | if ((asect->flags & SEC_ALLOC) != 0) |
1230 | this_hdr->sh_flags |= SHF_ALLOC; | |
1231 | if ((asect->flags & SEC_READONLY) == 0) | |
1232 | this_hdr->sh_flags |= SHF_WRITE; | |
1233 | if ((asect->flags & SEC_CODE) != 0) | |
1234 | this_hdr->sh_flags |= SHF_EXECINSTR; | |
244ffee7 | 1235 | |
fa15568a | 1236 | /* Check for processor-specific section types. */ |
f035cc47 ILT |
1237 | { |
1238 | struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
1239 | ||
1240 | if (bed->elf_backend_fake_sections) | |
1241 | (*bed->elf_backend_fake_sections) (abfd, this_hdr, asect); | |
1242 | } | |
1243 | ||
fa15568a ILT |
1244 | /* If the section has relocs, set up a section header for the |
1245 | SHT_REL[A] section. */ | |
1246 | if ((asect->flags & SEC_RELOC) != 0) | |
1247 | { | |
1248 | Elf_Internal_Shdr *rela_hdr; | |
1249 | int use_rela_p = get_elf_backend_data (abfd)->use_rela_p; | |
244ffee7 | 1250 | |
fa15568a ILT |
1251 | rela_hdr = &elf_section_data (asect)->rel_hdr; |
1252 | rela_hdr->sh_name = | |
1253 | bfd_add_2_to_strtab (abfd, elf_shstrtab (abfd), | |
1254 | use_rela_p ? ".rela" : ".rel", | |
1255 | asect->name); | |
1256 | rela_hdr->sh_type = use_rela_p ? SHT_RELA : SHT_REL; | |
1257 | rela_hdr->sh_entsize = (use_rela_p | |
1258 | ? sizeof (Elf_External_Rela) | |
1259 | : sizeof (Elf_External_Rel)); | |
1260 | rela_hdr->sh_addralign = FILE_ALIGN; | |
1261 | rela_hdr->sh_flags = 0; | |
1262 | rela_hdr->sh_addr = 0; | |
1263 | rela_hdr->sh_size = 0; | |
1264 | rela_hdr->sh_offset = 0; | |
1265 | rela_hdr->size = 0; | |
1266 | } | |
1267 | } | |
244ffee7 | 1268 | |
fa15568a ILT |
1269 | /* Assign all ELF section numbers. The dummy first section is handled here |
1270 | too. The link/info pointers for the standard section types are filled | |
e6667b2b | 1271 | in here too, while we're at it. */ |
244ffee7 | 1272 | |
fa15568a ILT |
1273 | static boolean |
1274 | assign_section_numbers (abfd) | |
1275 | bfd *abfd; | |
1276 | { | |
1277 | struct elf_obj_tdata *t = elf_tdata (abfd); | |
1278 | asection *sec; | |
1279 | unsigned int section_number; | |
1280 | Elf_Internal_Shdr **i_shdrp; | |
1281 | ||
1282 | section_number = 1; | |
1283 | ||
fa15568a ILT |
1284 | for (sec = abfd->sections; sec; sec = sec->next) |
1285 | { | |
1286 | struct bfd_elf_section_data *d = elf_section_data (sec); | |
1287 | ||
1288 | d->this_idx = section_number++; | |
1289 | if ((sec->flags & SEC_RELOC) == 0) | |
1290 | d->rel_idx = 0; | |
1291 | else | |
1292 | d->rel_idx = section_number++; | |
1293 | } | |
1294 | ||
7c726b66 ILT |
1295 | t->shstrtab_section = section_number++; |
1296 | elf_elfheader (abfd)->e_shstrndx = t->shstrtab_section; | |
1297 | t->shstrtab_hdr.sh_size = elf_shstrtab (abfd)->length; | |
1298 | t->shstrtab_hdr.contents = (PTR) elf_shstrtab (abfd)->tab; | |
1299 | ||
1300 | if (abfd->symcount > 0) | |
1301 | { | |
1302 | t->symtab_section = section_number++; | |
1303 | t->strtab_section = section_number++; | |
1304 | } | |
1305 | ||
fa15568a ILT |
1306 | elf_elfheader (abfd)->e_shnum = section_number; |
1307 | ||
1308 | /* Set up the list of section header pointers, in agreement with the | |
1309 | indices. */ | |
1310 | i_shdrp = ((Elf_Internal_Shdr **) | |
1311 | bfd_alloc (abfd, section_number * sizeof (Elf_Internal_Shdr *))); | |
1312 | if (i_shdrp == NULL) | |
1313 | { | |
1314 | bfd_set_error (bfd_error_no_memory); | |
1315 | return false; | |
1316 | } | |
1317 | ||
1318 | i_shdrp[0] = ((Elf_Internal_Shdr *) | |
1319 | bfd_alloc (abfd, sizeof (Elf_Internal_Shdr))); | |
1320 | if (i_shdrp[0] == NULL) | |
1321 | { | |
1322 | bfd_release (abfd, i_shdrp); | |
1323 | bfd_set_error (bfd_error_no_memory); | |
1324 | return false; | |
1325 | } | |
1326 | memset (i_shdrp[0], 0, sizeof (Elf_Internal_Shdr)); | |
1327 | ||
1328 | elf_elfsections (abfd) = i_shdrp; | |
1329 | ||
1330 | i_shdrp[t->shstrtab_section] = &t->shstrtab_hdr; | |
1331 | if (abfd->symcount > 0) | |
1332 | { | |
1333 | i_shdrp[t->symtab_section] = &t->symtab_hdr; | |
1334 | i_shdrp[t->strtab_section] = &t->strtab_hdr; | |
1335 | t->symtab_hdr.sh_link = t->strtab_section; | |
1336 | } | |
1337 | for (sec = abfd->sections; sec; sec = sec->next) | |
32090b8e | 1338 | { |
fa15568a ILT |
1339 | struct bfd_elf_section_data *d = elf_section_data (sec); |
1340 | asection *s; | |
1341 | const char *name; | |
1342 | ||
1343 | i_shdrp[d->this_idx] = &d->this_hdr; | |
1344 | if (d->rel_idx != 0) | |
1345 | i_shdrp[d->rel_idx] = &d->rel_hdr; | |
1346 | ||
1347 | /* Fill in the sh_link and sh_info fields while we're at it. */ | |
1348 | ||
1349 | /* sh_link of a reloc section is the section index of the symbol | |
1350 | table. sh_info is the section index of the section to which | |
1351 | the relocation entries apply. */ | |
1352 | if (d->rel_idx != 0) | |
1353 | { | |
1354 | d->rel_hdr.sh_link = t->symtab_section; | |
1355 | d->rel_hdr.sh_info = d->this_idx; | |
1356 | } | |
1357 | ||
1358 | switch (d->this_hdr.sh_type) | |
32090b8e | 1359 | { |
fa15568a ILT |
1360 | case SHT_REL: |
1361 | case SHT_RELA: | |
1362 | /* A reloc section which we are treating as a normal BFD | |
1363 | section. sh_link is the section index of the symbol | |
1364 | table. sh_info is the section index of the section to | |
1365 | which the relocation entries apply. We assume that an | |
1366 | allocated reloc section uses the dynamic symbol table. | |
1367 | FIXME: How can we be sure? */ | |
1368 | s = bfd_get_section_by_name (abfd, ".dynsym"); | |
1369 | if (s != NULL) | |
1370 | d->this_hdr.sh_link = elf_section_data (s)->this_idx; | |
1371 | ||
1372 | /* We look up the section the relocs apply to by name. */ | |
1373 | name = sec->name; | |
1374 | if (d->this_hdr.sh_type == SHT_REL) | |
1375 | name += 4; | |
1376 | else | |
1377 | name += 5; | |
1378 | s = bfd_get_section_by_name (abfd, name); | |
1379 | if (s != NULL) | |
1380 | d->this_hdr.sh_info = elf_section_data (s)->this_idx; | |
1381 | break; | |
1382 | ||
1383 | case SHT_STRTAB: | |
1384 | /* We assume that a section named .stab*str is a stabs | |
1385 | string section. We look for a section with the same name | |
1386 | but without the trailing ``str'', and set its sh_link | |
1387 | field to point to this section. */ | |
1388 | if (strncmp (sec->name, ".stab", sizeof ".stab" - 1) == 0 | |
1389 | && strcmp (sec->name + strlen (sec->name) - 3, "str") == 0) | |
1390 | { | |
1391 | size_t len; | |
1392 | char *alc; | |
1393 | ||
1394 | len = strlen (sec->name); | |
1395 | alc = (char *) malloc (len - 2); | |
1396 | if (alc == NULL) | |
1397 | { | |
1398 | bfd_set_error (bfd_error_no_memory); | |
1399 | return false; | |
1400 | } | |
1401 | strncpy (alc, sec->name, len - 3); | |
1402 | alc[len - 3] = '\0'; | |
1403 | s = bfd_get_section_by_name (abfd, alc); | |
1404 | free (alc); | |
1405 | if (s != NULL) | |
1406 | { | |
1407 | elf_section_data (s)->this_hdr.sh_link = d->this_idx; | |
1408 | ||
1409 | /* This is a .stab section. */ | |
1410 | elf_section_data (s)->this_hdr.sh_entsize = | |
1411 | 4 + 2 * (ARCH_SIZE / 8); | |
1412 | } | |
1413 | } | |
1414 | break; | |
1415 | ||
1416 | case SHT_DYNAMIC: | |
1417 | case SHT_DYNSYM: | |
1418 | /* sh_link is the section header index of the string table | |
1419 | used for the dynamic entries or symbol table. */ | |
1420 | s = bfd_get_section_by_name (abfd, ".dynstr"); | |
1421 | if (s != NULL) | |
1422 | d->this_hdr.sh_link = elf_section_data (s)->this_idx; | |
1423 | break; | |
1424 | ||
1425 | case SHT_HASH: | |
1426 | /* sh_link is the section header index of the symbol table | |
1427 | this hash table is for. */ | |
1428 | s = bfd_get_section_by_name (abfd, ".dynsym"); | |
1429 | if (s != NULL) | |
1430 | d->this_hdr.sh_link = elf_section_data (s)->this_idx; | |
1431 | break; | |
32090b8e KR |
1432 | } |
1433 | } | |
fa15568a ILT |
1434 | |
1435 | return true; | |
244ffee7 JK |
1436 | } |
1437 | ||
32090b8e KR |
1438 | /* Map symbol from it's internal number to the external number, moving |
1439 | all local symbols to be at the head of the list. */ | |
244ffee7 | 1440 | |
32090b8e | 1441 | static INLINE int |
062189c6 ILT |
1442 | sym_is_global (abfd, sym) |
1443 | bfd *abfd; | |
32090b8e KR |
1444 | asymbol *sym; |
1445 | { | |
062189c6 ILT |
1446 | /* If the backend has a special mapping, use it. */ |
1447 | if (get_elf_backend_data (abfd)->elf_backend_sym_is_global) | |
1448 | return ((*get_elf_backend_data (abfd)->elf_backend_sym_is_global) | |
1449 | (abfd, sym)); | |
1450 | ||
d24928c0 | 1451 | if (sym->flags & (BSF_GLOBAL | BSF_WEAK)) |
244ffee7 | 1452 | { |
32090b8e KR |
1453 | if (sym->flags & BSF_LOCAL) |
1454 | abort (); | |
1455 | return 1; | |
244ffee7 | 1456 | } |
d24928c0 KR |
1457 | if (sym->section == 0) |
1458 | { | |
1459 | /* Is this valid? */ | |
1460 | abort (); | |
1461 | ||
1462 | return 1; | |
1463 | } | |
badd23e3 | 1464 | if (bfd_is_und_section (sym->section)) |
32090b8e KR |
1465 | return 1; |
1466 | if (bfd_is_com_section (sym->section)) | |
1467 | return 1; | |
1468 | if (sym->flags & (BSF_LOCAL | BSF_SECTION_SYM | BSF_FILE)) | |
1469 | return 0; | |
1470 | return 0; | |
1471 | } | |
244ffee7 | 1472 | |
9783e04a | 1473 | static boolean |
1c6042ee ILT |
1474 | elf_map_symbols (abfd) |
1475 | bfd *abfd; | |
32090b8e KR |
1476 | { |
1477 | int symcount = bfd_get_symcount (abfd); | |
1478 | asymbol **syms = bfd_get_outsymbols (abfd); | |
d24928c0 | 1479 | asymbol **sect_syms; |
32090b8e KR |
1480 | int num_locals = 0; |
1481 | int num_globals = 0; | |
1482 | int num_locals2 = 0; | |
1483 | int num_globals2 = 0; | |
d24928c0 | 1484 | int max_index = 0; |
32090b8e | 1485 | int num_sections = 0; |
d24928c0 | 1486 | Elf_Sym_Extra *sym_extra; |
32090b8e KR |
1487 | int idx; |
1488 | asection *asect; | |
6a3eb9b6 | 1489 | |
32090b8e KR |
1490 | #ifdef DEBUG |
1491 | fprintf (stderr, "elf_map_symbols\n"); | |
1492 | fflush (stderr); | |
1493 | #endif | |
244ffee7 | 1494 | |
e621c5cc ILT |
1495 | /* Add local symbols for each section for which there are relocs. |
1496 | FIXME: How can we tell which sections have relocs at this point? | |
1497 | Will reloc_count always be accurate? Actually, I think most ELF | |
1498 | targets create section symbols for all sections anyhow. */ | |
32090b8e | 1499 | for (asect = abfd->sections; asect; asect = asect->next) |
244ffee7 | 1500 | { |
d24928c0 KR |
1501 | if (max_index < asect->index) |
1502 | max_index = asect->index; | |
244ffee7 JK |
1503 | } |
1504 | ||
d24928c0 KR |
1505 | max_index++; |
1506 | elf_num_section_syms (abfd) = max_index; | |
1507 | sect_syms = (asymbol **) bfd_zalloc (abfd, max_index * sizeof (asymbol *)); | |
1508 | elf_section_syms (abfd) = sect_syms; | |
1509 | ||
5e829a34 | 1510 | if (sect_syms == 0) |
9783e04a | 1511 | { |
d1ad85a6 | 1512 | bfd_set_error (bfd_error_no_memory); |
9783e04a DM |
1513 | return false; |
1514 | } | |
d24928c0 KR |
1515 | |
1516 | for (asect = abfd->sections; asect; asect = asect->next) | |
e621c5cc ILT |
1517 | { |
1518 | asymbol *sym = bfd_make_empty_symbol (abfd); | |
9783e04a DM |
1519 | if (!sym) |
1520 | { | |
d1ad85a6 | 1521 | bfd_set_error (bfd_error_no_memory); |
9783e04a DM |
1522 | return false; |
1523 | } | |
e621c5cc ILT |
1524 | sym->the_bfd = abfd; |
1525 | sym->name = asect->name; | |
1526 | sym->value = asect->vma; | |
1527 | sym->flags = BSF_SECTION_SYM; | |
1528 | sym->section = asect; | |
1529 | sect_syms[asect->index] = sym; | |
1530 | num_sections++; | |
d24928c0 | 1531 | #ifdef DEBUG |
e621c5cc ILT |
1532 | fprintf (stderr, |
1533 | "creating section symbol, name = %s, value = 0x%.8lx, index = %d, section = 0x%.8lx\n", | |
1534 | asect->name, (long) asect->vma, asect->index, (long) asect); | |
d24928c0 | 1535 | #endif |
e621c5cc | 1536 | } |
d24928c0 | 1537 | |
32090b8e | 1538 | if (num_sections) |
244ffee7 | 1539 | { |
32090b8e KR |
1540 | if (syms) |
1541 | syms = (asymbol **) bfd_realloc (abfd, syms, | |
1542 | ((symcount + num_sections + 1) | |
1543 | * sizeof (asymbol *))); | |
1544 | else | |
1545 | syms = (asymbol **) bfd_alloc (abfd, | |
1c6042ee | 1546 | (num_sections + 1) * sizeof (asymbol *)); |
9783e04a DM |
1547 | if (!syms) |
1548 | { | |
d1ad85a6 | 1549 | bfd_set_error (bfd_error_no_memory); |
9783e04a DM |
1550 | return false; |
1551 | } | |
244ffee7 | 1552 | |
32090b8e KR |
1553 | for (asect = abfd->sections; asect; asect = asect->next) |
1554 | { | |
d24928c0 KR |
1555 | if (sect_syms[asect->index]) |
1556 | syms[symcount++] = sect_syms[asect->index]; | |
32090b8e | 1557 | } |
244ffee7 | 1558 | |
32090b8e KR |
1559 | syms[symcount] = (asymbol *) 0; |
1560 | bfd_set_symtab (abfd, syms, symcount); | |
1561 | } | |
244ffee7 | 1562 | |
d24928c0 KR |
1563 | elf_sym_extra (abfd) = sym_extra |
1564 | = (Elf_Sym_Extra *) bfd_alloc (abfd, symcount * sizeof (Elf_Sym_Extra)); | |
9783e04a DM |
1565 | if (!sym_extra) |
1566 | { | |
d1ad85a6 | 1567 | bfd_set_error (bfd_error_no_memory); |
9783e04a DM |
1568 | return false; |
1569 | } | |
244ffee7 | 1570 | |
32090b8e KR |
1571 | /* Identify and classify all of the symbols. */ |
1572 | for (idx = 0; idx < symcount; idx++) | |
244ffee7 | 1573 | { |
062189c6 | 1574 | if (!sym_is_global (abfd, syms[idx])) |
32090b8e KR |
1575 | num_locals++; |
1576 | else | |
1577 | num_globals++; | |
244ffee7 | 1578 | } |
32090b8e KR |
1579 | |
1580 | /* Now provide mapping information. Add +1 for skipping over the | |
1581 | dummy symbol. */ | |
1582 | for (idx = 0; idx < symcount; idx++) | |
244ffee7 | 1583 | { |
1c6042ee | 1584 | syms[idx]->udata = (PTR) & sym_extra[idx]; |
062189c6 | 1585 | if (!sym_is_global (abfd, syms[idx])) |
d24928c0 | 1586 | sym_extra[idx].elf_sym_num = 1 + num_locals2++; |
32090b8e | 1587 | else |
d24928c0 | 1588 | sym_extra[idx].elf_sym_num = 1 + num_locals + num_globals2++; |
244ffee7 JK |
1589 | } |
1590 | ||
32090b8e KR |
1591 | elf_num_locals (abfd) = num_locals; |
1592 | elf_num_globals (abfd) = num_globals; | |
9783e04a | 1593 | return true; |
32090b8e | 1594 | } |
244ffee7 | 1595 | |
6ec3bb6a ILT |
1596 | /* Compute the file positions we are going to put the sections at, and |
1597 | otherwise prepare to begin writing out the ELF file. If LINK_INFO | |
1598 | is not NULL, this is being called by the ELF backend linker. */ | |
244ffee7 | 1599 | |
32090b8e | 1600 | static boolean |
6ec3bb6a | 1601 | elf_compute_section_file_positions (abfd, link_info) |
1c6042ee | 1602 | bfd *abfd; |
6ec3bb6a | 1603 | struct bfd_link_info *link_info; |
32090b8e | 1604 | { |
6ec3bb6a ILT |
1605 | struct elf_backend_data *bed = get_elf_backend_data (abfd); |
1606 | Elf_Internal_Shdr *shstrtab_hdr; | |
1607 | ||
1608 | if (abfd->output_has_begun) | |
1609 | return true; | |
1610 | ||
1611 | /* Do any elf backend specific processing first. */ | |
1612 | if (bed->elf_backend_begin_write_processing) | |
71edd06d | 1613 | (*bed->elf_backend_begin_write_processing) (abfd, link_info); |
6ec3bb6a ILT |
1614 | |
1615 | if (! prep_headers (abfd)) | |
1616 | return false; | |
1617 | ||
32090b8e | 1618 | bfd_map_over_sections (abfd, elf_fake_sections, 0); |
244ffee7 | 1619 | |
9783e04a DM |
1620 | if (!assign_section_numbers (abfd)) |
1621 | return false; | |
244ffee7 | 1622 | |
6ec3bb6a ILT |
1623 | /* The backend linker builds symbol table information itself. */ |
1624 | if (link_info == NULL) | |
1625 | { | |
1626 | if (! swap_out_syms (abfd)) | |
1627 | return false; | |
1628 | } | |
244ffee7 | 1629 | |
6ec3bb6a ILT |
1630 | shstrtab_hdr = &elf_tdata (abfd)->shstrtab_hdr; |
1631 | /* sh_name was set in prep_headers. */ | |
1632 | shstrtab_hdr->sh_type = SHT_STRTAB; | |
1633 | shstrtab_hdr->sh_flags = 0; | |
1634 | shstrtab_hdr->sh_addr = 0; | |
1635 | shstrtab_hdr->sh_size = elf_shstrtab (abfd)->length; | |
1636 | shstrtab_hdr->sh_entsize = 0; | |
1637 | shstrtab_hdr->sh_link = 0; | |
1638 | shstrtab_hdr->sh_info = 0; | |
1639 | /* sh_offset is set in assign_file_positions_for_symtabs_and_strtabs. */ | |
1640 | shstrtab_hdr->sh_addralign = 1; | |
1641 | shstrtab_hdr->contents = (PTR) elf_shstrtab (abfd)->tab; | |
1642 | ||
1643 | if (!assign_file_positions_except_relocs (abfd, | |
1644 | link_info == NULL ? true : false)) | |
9783e04a | 1645 | return false; |
32090b8e | 1646 | |
6ec3bb6a ILT |
1647 | abfd->output_has_begun = true; |
1648 | ||
32090b8e KR |
1649 | return true; |
1650 | } | |
1651 | ||
244ffee7 | 1652 | |
013dec1a ILT |
1653 | /* Align to the maximum file alignment that could be required for any |
1654 | ELF data structure. */ | |
1655 | ||
1656 | static INLINE file_ptr | |
1657 | align_file_position (off) | |
1658 | file_ptr off; | |
1659 | { | |
1660 | return (off + FILE_ALIGN - 1) & ~(FILE_ALIGN - 1); | |
1661 | } | |
1662 | ||
1663 | /* Assign a file position to a section, optionally aligning to the | |
1664 | required section alignment. */ | |
1665 | ||
32090b8e | 1666 | static INLINE file_ptr |
013dec1a | 1667 | assign_file_position_for_section (i_shdrp, offset, align) |
32090b8e KR |
1668 | Elf_Internal_Shdr *i_shdrp; |
1669 | file_ptr offset; | |
013dec1a | 1670 | boolean align; |
32090b8e | 1671 | { |
013dec1a ILT |
1672 | if (align) |
1673 | { | |
1674 | unsigned int al; | |
f035cc47 | 1675 | |
013dec1a ILT |
1676 | al = i_shdrp->sh_addralign; |
1677 | if (al > 1) | |
1678 | offset = BFD_ALIGN (offset, al); | |
1679 | } | |
1680 | i_shdrp->sh_offset = offset; | |
7b8106b4 ILT |
1681 | if (i_shdrp->rawdata != NULL) |
1682 | ((asection *) i_shdrp->rawdata)->filepos = offset; | |
300adb31 KR |
1683 | if (i_shdrp->sh_type != SHT_NOBITS) |
1684 | offset += i_shdrp->sh_size; | |
32090b8e | 1685 | return offset; |
244ffee7 JK |
1686 | } |
1687 | ||
013dec1a ILT |
1688 | /* Get the size of the program header. This is called by the linker |
1689 | before any of the section VMA's are set, so it can't calculate the | |
1690 | correct value for a strange memory layout. */ | |
01383fb4 | 1691 | |
013dec1a ILT |
1692 | static bfd_size_type |
1693 | get_program_header_size (abfd) | |
300adb31 | 1694 | bfd *abfd; |
300adb31 | 1695 | { |
013dec1a ILT |
1696 | size_t segs; |
1697 | asection *s; | |
300adb31 | 1698 | |
013dec1a ILT |
1699 | /* Assume we will need exactly two PT_LOAD segments: one for text |
1700 | and one for data. */ | |
1701 | segs = 2; | |
1702 | ||
1703 | s = bfd_get_section_by_name (abfd, ".interp"); | |
1704 | if (s != NULL && (s->flags & SEC_LOAD) != 0) | |
1705 | { | |
1706 | /* If we have a loadable interpreter section, we need a | |
1707 | PT_INTERP segment. In this case, assume we also need a | |
1708 | PT_PHDR segment, although that may not be true for all | |
1709 | targets. */ | |
1710 | segs += 2; | |
1711 | } | |
1712 | ||
1713 | if (bfd_get_section_by_name (abfd, ".dynamic") != NULL) | |
1714 | { | |
1715 | /* We need a PT_DYNAMIC segment. */ | |
1716 | ++segs; | |
1717 | } | |
1718 | ||
1719 | return segs * sizeof (Elf_External_Phdr); | |
300adb31 KR |
1720 | } |
1721 | ||
013dec1a ILT |
1722 | /* Create the program header. OFF is the file offset where the |
1723 | program header should be written. FIRST is the first loadable ELF | |
1724 | section. PHDR_SIZE is the size of the program header as returned | |
1725 | by get_program_header_size. */ | |
300adb31 | 1726 | |
013dec1a ILT |
1727 | static file_ptr |
1728 | map_program_segments (abfd, off, first, phdr_size) | |
300adb31 | 1729 | bfd *abfd; |
013dec1a ILT |
1730 | file_ptr off; |
1731 | Elf_Internal_Shdr *first; | |
1732 | bfd_size_type phdr_size; | |
300adb31 | 1733 | { |
6731b89c | 1734 | Elf_Internal_Phdr phdrs[10]; |
013dec1a | 1735 | unsigned int phdr_count; |
300adb31 | 1736 | Elf_Internal_Phdr *phdr; |
013dec1a ILT |
1737 | int phdr_size_adjust; |
1738 | unsigned int i; | |
1739 | Elf_Internal_Shdr **hdrpp; | |
1740 | asection *sinterp, *sdyn; | |
1741 | unsigned int last_type; | |
1742 | Elf_Internal_Ehdr *i_ehdrp; | |
1743 | ||
1744 | BFD_ASSERT ((abfd->flags & EXEC_P) != 0); | |
6731b89c ILT |
1745 | BFD_ASSERT (phdr_size / sizeof (Elf_Internal_Phdr) |
1746 | <= sizeof phdrs / sizeof (phdrs[0])); | |
013dec1a ILT |
1747 | |
1748 | phdr_count = 0; | |
1749 | phdr = phdrs; | |
1750 | ||
1751 | phdr_size_adjust = 0; | |
300adb31 | 1752 | |
013dec1a ILT |
1753 | /* If we have a loadable .interp section, we must create a PT_INTERP |
1754 | segment which must precede all PT_LOAD segments. We assume that | |
1755 | we must also create a PT_PHDR segment, although that may not be | |
1756 | true for all targets. */ | |
1757 | sinterp = bfd_get_section_by_name (abfd, ".interp"); | |
1758 | if (sinterp != NULL && (sinterp->flags & SEC_LOAD) != 0) | |
80425e6c | 1759 | { |
013dec1a ILT |
1760 | BFD_ASSERT (first != NULL); |
1761 | ||
1762 | phdr->p_type = PT_PHDR; | |
1763 | ||
1764 | phdr->p_offset = off; | |
1765 | ||
1766 | /* Account for any adjustment made because of the alignment of | |
1767 | the first loadable section. */ | |
1768 | phdr_size_adjust = (first->sh_offset - phdr_size) - off; | |
1769 | BFD_ASSERT (phdr_size_adjust >= 0 && phdr_size_adjust < 128); | |
1770 | ||
1771 | /* The program header precedes all loadable sections. This lets | |
1772 | us compute its loadable address. This depends on the linker | |
1773 | script. */ | |
1774 | phdr->p_vaddr = first->sh_addr - (phdr_size + phdr_size_adjust); | |
1775 | ||
1776 | phdr->p_paddr = 0; | |
1777 | phdr->p_filesz = phdr_size; | |
1778 | phdr->p_memsz = phdr_size; | |
1779 | ||
1780 | /* FIXME: UnixWare and Solaris set PF_X, Irix 5 does not. */ | |
1781 | phdr->p_flags = PF_R | PF_X; | |
1782 | ||
1783 | phdr->p_align = FILE_ALIGN; | |
1784 | BFD_ASSERT ((phdr->p_vaddr - phdr->p_offset) % FILE_ALIGN == 0); | |
1785 | ||
1786 | /* Include the ELF header in the first loadable segment. */ | |
1787 | phdr_size_adjust += off; | |
1788 | ||
1789 | ++phdr_count; | |
1790 | ++phdr; | |
1791 | ||
1792 | phdr->p_type = PT_INTERP; | |
1793 | phdr->p_offset = sinterp->filepos; | |
1794 | phdr->p_vaddr = sinterp->vma; | |
1795 | phdr->p_paddr = 0; | |
1796 | phdr->p_filesz = sinterp->_raw_size; | |
1797 | phdr->p_memsz = sinterp->_raw_size; | |
1798 | phdr->p_flags = PF_R; | |
1799 | phdr->p_align = 1 << bfd_get_section_alignment (abfd, sinterp); | |
1800 | ||
1801 | ++phdr_count; | |
1802 | ++phdr; | |
80425e6c | 1803 | } |
013dec1a ILT |
1804 | |
1805 | /* Look through the sections to see how they will be divided into | |
1806 | program segments. The sections must be arranged in order by | |
1807 | sh_addr for this to work correctly. */ | |
1808 | phdr->p_type = PT_NULL; | |
1809 | last_type = SHT_PROGBITS; | |
1810 | for (i = 1, hdrpp = elf_elfsections (abfd) + 1; | |
1811 | i < elf_elfheader (abfd)->e_shnum; | |
1812 | i++, hdrpp++) | |
300adb31 | 1813 | { |
013dec1a ILT |
1814 | Elf_Internal_Shdr *hdr; |
1815 | ||
1816 | hdr = *hdrpp; | |
1817 | ||
1818 | /* Ignore any section which will not be part of the process | |
1819 | image. */ | |
1820 | if ((hdr->sh_flags & SHF_ALLOC) == 0) | |
1821 | continue; | |
1822 | ||
1823 | /* If this section fits in the segment we are constructing, add | |
1824 | it in. */ | |
1825 | if (phdr->p_type != PT_NULL | |
1826 | && (hdr->sh_offset - (phdr->p_offset + phdr->p_memsz) | |
1827 | == hdr->sh_addr - (phdr->p_vaddr + phdr->p_memsz)) | |
1828 | && (last_type != SHT_NOBITS || hdr->sh_type == SHT_NOBITS)) | |
300adb31 | 1829 | { |
013dec1a ILT |
1830 | bfd_size_type adjust; |
1831 | ||
1832 | adjust = hdr->sh_addr - (phdr->p_vaddr + phdr->p_memsz); | |
1833 | phdr->p_memsz += hdr->sh_size + adjust; | |
1834 | if (hdr->sh_type != SHT_NOBITS) | |
1835 | phdr->p_filesz += hdr->sh_size + adjust; | |
1836 | if ((hdr->sh_flags & SHF_WRITE) != 0) | |
1837 | phdr->p_flags |= PF_W; | |
1838 | if ((hdr->sh_flags & SHF_EXECINSTR) != 0) | |
1839 | phdr->p_flags |= PF_X; | |
1840 | last_type = hdr->sh_type; | |
300adb31 KR |
1841 | continue; |
1842 | } | |
300adb31 | 1843 | |
013dec1a ILT |
1844 | /* If we have a segment, move to the next one. */ |
1845 | if (phdr->p_type != PT_NULL) | |
300adb31 | 1846 | { |
013dec1a ILT |
1847 | ++phdr; |
1848 | ++phdr_count; | |
300adb31 | 1849 | } |
013dec1a ILT |
1850 | |
1851 | /* Start a new segment. */ | |
1852 | phdr->p_type = PT_LOAD; | |
1853 | phdr->p_offset = hdr->sh_offset; | |
1854 | phdr->p_vaddr = hdr->sh_addr; | |
1855 | phdr->p_paddr = 0; | |
1856 | if (hdr->sh_type == SHT_NOBITS) | |
1857 | phdr->p_filesz = 0; | |
1858 | else | |
1859 | phdr->p_filesz = hdr->sh_size; | |
1860 | phdr->p_memsz = hdr->sh_size; | |
1861 | phdr->p_flags = PF_R; | |
1862 | if ((hdr->sh_flags & SHF_WRITE) != 0) | |
1863 | phdr->p_flags |= PF_W; | |
1864 | if ((hdr->sh_flags & SHF_EXECINSTR) != 0) | |
1865 | phdr->p_flags |= PF_X; | |
1866 | phdr->p_align = get_elf_backend_data (abfd)->maxpagesize; | |
1867 | ||
1868 | if (hdr == first | |
1869 | && sinterp != NULL | |
1870 | && (sinterp->flags & SEC_LOAD) != 0) | |
2f3189e7 | 1871 | { |
013dec1a ILT |
1872 | phdr->p_offset -= phdr_size + phdr_size_adjust; |
1873 | phdr->p_vaddr -= phdr_size + phdr_size_adjust; | |
1874 | phdr->p_filesz += phdr_size + phdr_size_adjust; | |
1875 | phdr->p_memsz += phdr_size + phdr_size_adjust; | |
2f3189e7 | 1876 | } |
300adb31 | 1877 | |
013dec1a | 1878 | last_type = hdr->sh_type; |
300adb31 | 1879 | } |
300adb31 | 1880 | |
013dec1a ILT |
1881 | if (phdr->p_type != PT_NULL) |
1882 | { | |
1883 | ++phdr; | |
1884 | ++phdr_count; | |
1885 | } | |
1886 | ||
1887 | /* If we have a .dynamic section, create a PT_DYNAMIC segment. */ | |
1888 | sdyn = bfd_get_section_by_name (abfd, ".dynamic"); | |
1889 | if (sdyn != NULL && (sdyn->flags & SEC_LOAD) != 0) | |
1890 | { | |
1891 | phdr->p_type = PT_DYNAMIC; | |
1892 | phdr->p_offset = sdyn->filepos; | |
1893 | phdr->p_vaddr = sdyn->vma; | |
1894 | phdr->p_paddr = 0; | |
1895 | phdr->p_filesz = sdyn->_raw_size; | |
1896 | phdr->p_memsz = sdyn->_raw_size; | |
1897 | phdr->p_flags = PF_R; | |
1898 | if ((sdyn->flags & SEC_READONLY) == 0) | |
1899 | phdr->p_flags |= PF_W; | |
1900 | if ((sdyn->flags & SEC_CODE) != 0) | |
1901 | phdr->p_flags |= PF_X; | |
1902 | phdr->p_align = 1 << bfd_get_section_alignment (abfd, sdyn); | |
1903 | ||
1904 | ++phdr; | |
1905 | ++phdr_count; | |
1906 | } | |
1907 | ||
013dec1a ILT |
1908 | /* Make sure the return value from get_program_header_size matches |
1909 | what we computed here. */ | |
5315c428 | 1910 | if (phdr_count != phdr_size / sizeof (Elf_External_Phdr)) |
013dec1a ILT |
1911 | abort (); |
1912 | ||
1913 | /* Set up program header information. */ | |
1914 | i_ehdrp = elf_elfheader (abfd); | |
1915 | i_ehdrp->e_phentsize = sizeof (Elf_External_Phdr); | |
1916 | i_ehdrp->e_phoff = off; | |
1917 | i_ehdrp->e_phnum = phdr_count; | |
1918 | ||
1919 | /* Save the program headers away. I don't think anybody uses this | |
1920 | information right now. */ | |
1921 | elf_tdata (abfd)->phdr = ((Elf_Internal_Phdr *) | |
1922 | bfd_alloc (abfd, | |
1923 | (phdr_count | |
1924 | * sizeof (Elf_Internal_Phdr)))); | |
1925 | if (elf_tdata (abfd)->phdr == NULL && phdr_count != 0) | |
1926 | { | |
1927 | bfd_set_error (bfd_error_no_memory); | |
1928 | return (file_ptr) -1; | |
1929 | } | |
1930 | memcpy (elf_tdata (abfd)->phdr, phdrs, | |
1931 | phdr_count * sizeof (Elf_Internal_Phdr)); | |
1932 | ||
1933 | /* Write out the program headers. */ | |
1934 | if (bfd_seek (abfd, off, SEEK_SET) != 0) | |
1935 | return (file_ptr) -1; | |
1936 | ||
1937 | for (i = 0, phdr = phdrs; i < phdr_count; i++, phdr++) | |
1938 | { | |
1939 | Elf_External_Phdr extphdr; | |
1940 | ||
1941 | elf_swap_phdr_out (abfd, phdr, &extphdr); | |
1942 | if (bfd_write (&extphdr, sizeof (Elf_External_Phdr), 1, abfd) | |
1943 | != sizeof (Elf_External_Phdr)) | |
1944 | return (file_ptr) -1; | |
1945 | } | |
1946 | ||
1947 | return off + phdr_count * sizeof (Elf_External_Phdr); | |
300adb31 KR |
1948 | } |
1949 | ||
013dec1a ILT |
1950 | /* Work out the file positions of all the sections. This is called by |
1951 | elf_compute_section_file_positions. All the section sizes and VMAs | |
1952 | must be known before this is called. | |
1953 | ||
1954 | We do not consider reloc sections at this point, unless they form | |
1955 | part of the loadable image. Reloc sections are assigned file | |
1956 | positions in assign_file_positions_for_relocs, which is called by | |
1957 | write_object_contents and final_link. | |
1958 | ||
1959 | If DOSYMS is false, we do not assign file positions for the symbol | |
1960 | table or the string table. */ | |
1961 | ||
9783e04a | 1962 | static boolean |
6ec3bb6a | 1963 | assign_file_positions_except_relocs (abfd, dosyms) |
32090b8e | 1964 | bfd *abfd; |
6ec3bb6a | 1965 | boolean dosyms; |
244ffee7 | 1966 | { |
013dec1a ILT |
1967 | struct elf_obj_tdata * const tdata = elf_tdata (abfd); |
1968 | Elf_Internal_Ehdr * const i_ehdrp = elf_elfheader (abfd); | |
1969 | Elf_Internal_Shdr ** const i_shdrpp = elf_elfsections (abfd); | |
32090b8e | 1970 | file_ptr off; |
32090b8e | 1971 | |
013dec1a | 1972 | /* Start after the ELF header. */ |
32090b8e | 1973 | off = i_ehdrp->e_ehsize; |
300adb31 | 1974 | |
013dec1a | 1975 | if ((abfd->flags & EXEC_P) == 0) |
300adb31 | 1976 | { |
013dec1a ILT |
1977 | Elf_Internal_Shdr **hdrpp; |
1978 | unsigned int i; | |
062189c6 | 1979 | |
013dec1a ILT |
1980 | /* We are not creating an executable, which means that we are |
1981 | not creating a program header, and that the actual order of | |
1982 | the sections in the file is unimportant. */ | |
1983 | for (i = 1, hdrpp = i_shdrpp + 1; i < i_ehdrp->e_shnum; i++, hdrpp++) | |
244ffee7 | 1984 | { |
013dec1a ILT |
1985 | Elf_Internal_Shdr *hdr; |
1986 | ||
1987 | hdr = *hdrpp; | |
1988 | if (hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA) | |
300adb31 | 1989 | { |
013dec1a | 1990 | hdr->sh_offset = -1; |
300adb31 KR |
1991 | continue; |
1992 | } | |
013dec1a ILT |
1993 | if (! dosyms |
1994 | && (i == tdata->symtab_section | |
1995 | || i == tdata->strtab_section)) | |
300adb31 | 1996 | { |
013dec1a ILT |
1997 | hdr->sh_offset = -1; |
1998 | continue; | |
300adb31 | 1999 | } |
013dec1a ILT |
2000 | |
2001 | off = assign_file_position_for_section (hdr, off, true); | |
300adb31 | 2002 | } |
300adb31 | 2003 | } |
013dec1a | 2004 | else |
300adb31 | 2005 | { |
013dec1a ILT |
2006 | file_ptr phdr_off; |
2007 | bfd_size_type phdr_size; | |
2008 | bfd_vma maxpagesize; | |
2009 | Elf_Internal_Shdr **hdrpp; | |
2010 | unsigned int i; | |
2011 | Elf_Internal_Shdr *first; | |
2012 | file_ptr phdr_map; | |
2013 | ||
2014 | /* We are creating an executable. We must create a program | |
2015 | header. We can't actually create the program header until we | |
2016 | have set the file positions for the sections, but we can | |
2017 | figure out how big it is going to be. */ | |
2018 | off = align_file_position (off); | |
2019 | phdr_size = get_program_header_size (abfd); | |
2020 | if (phdr_size == (file_ptr) -1) | |
9783e04a | 2021 | return false; |
013dec1a ILT |
2022 | phdr_off = off; |
2023 | off += phdr_size; | |
2024 | ||
2025 | maxpagesize = get_elf_backend_data (abfd)->maxpagesize; | |
2026 | if (maxpagesize == 0) | |
2027 | maxpagesize = 1; | |
2028 | ||
2029 | /* FIXME: We might want to sort the sections on the sh_addr | |
2030 | field here. For now, we just assume that the linker will | |
2031 | create the sections in an appropriate order. */ | |
2032 | ||
2033 | /* Assign file positions in two passes. In the first pass, we | |
2034 | assign a file position to every section which forms part of | |
2035 | the executable image. */ | |
2036 | first = NULL; | |
2037 | for (i = 1, hdrpp = i_shdrpp + 1; i < i_ehdrp->e_shnum; i++, hdrpp++) | |
2038 | { | |
2039 | Elf_Internal_Shdr *hdr; | |
300adb31 | 2040 | |
013dec1a ILT |
2041 | hdr = *hdrpp; |
2042 | if ((hdr->sh_flags & SHF_ALLOC) == 0) | |
2043 | continue; | |
2044 | ||
2045 | if (first == NULL) | |
2046 | first = hdr; | |
2047 | ||
2048 | if ((abfd->flags & D_PAGED) != 0) | |
2049 | { | |
2050 | /* The section VMA must equal the file position modulo | |
2051 | the page size. This is required by the program | |
2052 | header. */ | |
2053 | off += (hdr->sh_addr - off) % maxpagesize; | |
2054 | } | |
300adb31 | 2055 | |
013dec1a ILT |
2056 | off = assign_file_position_for_section (hdr, off, false); |
2057 | } | |
300adb31 | 2058 | |
013dec1a ILT |
2059 | /* Assign file positions to all the sections which do not form |
2060 | part of the loadable image, except for the relocs. */ | |
2061 | for (i = 1, hdrpp = i_shdrpp + 1; i < i_ehdrp->e_shnum; i++, hdrpp++) | |
300adb31 | 2062 | { |
013dec1a ILT |
2063 | Elf_Internal_Shdr *hdr; |
2064 | ||
2065 | hdr = *hdrpp; | |
2066 | if ((hdr->sh_flags & SHF_ALLOC) != 0) | |
2067 | continue; | |
2068 | if (hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA) | |
2069 | { | |
2070 | hdr->sh_offset = -1; | |
2071 | continue; | |
2072 | } | |
2073 | if (! dosyms | |
2074 | && (i == tdata->symtab_section | |
2075 | || i == tdata->strtab_section)) | |
2076 | { | |
2077 | hdr->sh_offset = -1; | |
2078 | continue; | |
2079 | } | |
2080 | ||
2081 | off = assign_file_position_for_section (hdr, off, true); | |
300adb31 | 2082 | } |
013dec1a ILT |
2083 | |
2084 | phdr_map = map_program_segments (abfd, phdr_off, first, phdr_size); | |
2085 | if (phdr_map == (file_ptr) -1) | |
2086 | return false; | |
2087 | BFD_ASSERT (phdr_map == phdr_off + phdr_size); | |
244ffee7 | 2088 | } |
013dec1a ILT |
2089 | |
2090 | /* Place the section headers. */ | |
2091 | off = align_file_position (off); | |
2092 | i_ehdrp->e_shoff = off; | |
2093 | off += i_ehdrp->e_shnum * i_ehdrp->e_shentsize; | |
2094 | ||
32090b8e | 2095 | elf_tdata (abfd)->next_file_pos = off; |
013dec1a | 2096 | |
9783e04a | 2097 | return true; |
244ffee7 JK |
2098 | } |
2099 | ||
32090b8e KR |
2100 | static boolean |
2101 | prep_headers (abfd) | |
2102 | bfd *abfd; | |
2103 | { | |
32090b8e | 2104 | Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */ |
1c6042ee | 2105 | Elf_Internal_Phdr *i_phdrp = 0; /* Program header table, internal form */ |
32090b8e | 2106 | Elf_Internal_Shdr **i_shdrp; /* Section header table, internal form */ |
32090b8e | 2107 | int count; |
32090b8e | 2108 | struct strtab *shstrtab; |
244ffee7 | 2109 | |
32090b8e KR |
2110 | i_ehdrp = elf_elfheader (abfd); |
2111 | i_shdrp = elf_elfsections (abfd); | |
244ffee7 | 2112 | |
32090b8e | 2113 | shstrtab = bfd_new_strtab (abfd); |
b9d5cdf0 DM |
2114 | if (!shstrtab) |
2115 | return false; | |
1c6042ee | 2116 | |
32090b8e | 2117 | elf_shstrtab (abfd) = shstrtab; |
244ffee7 | 2118 | |
32090b8e KR |
2119 | i_ehdrp->e_ident[EI_MAG0] = ELFMAG0; |
2120 | i_ehdrp->e_ident[EI_MAG1] = ELFMAG1; | |
2121 | i_ehdrp->e_ident[EI_MAG2] = ELFMAG2; | |
2122 | i_ehdrp->e_ident[EI_MAG3] = ELFMAG3; | |
244ffee7 | 2123 | |
32090b8e KR |
2124 | i_ehdrp->e_ident[EI_CLASS] = ELFCLASS; |
2125 | i_ehdrp->e_ident[EI_DATA] = | |
2126 | abfd->xvec->byteorder_big_p ? ELFDATA2MSB : ELFDATA2LSB; | |
2127 | i_ehdrp->e_ident[EI_VERSION] = EV_CURRENT; | |
244ffee7 | 2128 | |
32090b8e KR |
2129 | for (count = EI_PAD; count < EI_NIDENT; count++) |
2130 | i_ehdrp->e_ident[count] = 0; | |
244ffee7 | 2131 | |
8af74670 ILT |
2132 | if ((abfd->flags & DYNAMIC) != 0) |
2133 | i_ehdrp->e_type = ET_DYN; | |
2134 | else if ((abfd->flags & EXEC_P) != 0) | |
2135 | i_ehdrp->e_type = ET_EXEC; | |
2136 | else | |
2137 | i_ehdrp->e_type = ET_REL; | |
2138 | ||
32090b8e | 2139 | switch (bfd_get_arch (abfd)) |
fce36137 | 2140 | { |
32090b8e KR |
2141 | case bfd_arch_unknown: |
2142 | i_ehdrp->e_machine = EM_NONE; | |
2143 | break; | |
2144 | case bfd_arch_sparc: | |
32090b8e KR |
2145 | #if ARCH_SIZE == 64 |
2146 | i_ehdrp->e_machine = EM_SPARC64; | |
5546cc7e KR |
2147 | #else |
2148 | i_ehdrp->e_machine = EM_SPARC; | |
32090b8e | 2149 | #endif |
32090b8e KR |
2150 | break; |
2151 | case bfd_arch_i386: | |
2152 | i_ehdrp->e_machine = EM_386; | |
2153 | break; | |
2154 | case bfd_arch_m68k: | |
2155 | i_ehdrp->e_machine = EM_68K; | |
2156 | break; | |
2157 | case bfd_arch_m88k: | |
2158 | i_ehdrp->e_machine = EM_88K; | |
2159 | break; | |
2160 | case bfd_arch_i860: | |
2161 | i_ehdrp->e_machine = EM_860; | |
2162 | break; | |
2163 | case bfd_arch_mips: /* MIPS Rxxxx */ | |
2164 | i_ehdrp->e_machine = EM_MIPS; /* only MIPS R3000 */ | |
2165 | break; | |
2166 | case bfd_arch_hppa: | |
459ae909 | 2167 | i_ehdrp->e_machine = EM_PARISC; |
32090b8e | 2168 | break; |
99ec1f66 ILT |
2169 | case bfd_arch_powerpc: |
2170 | i_ehdrp->e_machine = EM_CYGNUS_POWERPC; | |
2171 | break; | |
32090b8e KR |
2172 | /* also note that EM_M32, AT&T WE32100 is unknown to bfd */ |
2173 | default: | |
2174 | i_ehdrp->e_machine = EM_NONE; | |
fce36137 | 2175 | } |
32090b8e KR |
2176 | i_ehdrp->e_version = EV_CURRENT; |
2177 | i_ehdrp->e_ehsize = sizeof (Elf_External_Ehdr); | |
244ffee7 | 2178 | |
32090b8e KR |
2179 | /* no program header, for now. */ |
2180 | i_ehdrp->e_phoff = 0; | |
2181 | i_ehdrp->e_phentsize = 0; | |
2182 | i_ehdrp->e_phnum = 0; | |
244ffee7 | 2183 | |
32090b8e KR |
2184 | /* each bfd section is section header entry */ |
2185 | i_ehdrp->e_entry = bfd_get_start_address (abfd); | |
2186 | i_ehdrp->e_shentsize = sizeof (Elf_External_Shdr); | |
244ffee7 | 2187 | |
32090b8e KR |
2188 | /* if we're building an executable, we'll need a program header table */ |
2189 | if (abfd->flags & EXEC_P) | |
244ffee7 | 2190 | { |
300adb31 | 2191 | /* it all happens later */ |
32090b8e KR |
2192 | #if 0 |
2193 | i_ehdrp->e_phentsize = sizeof (Elf_External_Phdr); | |
244ffee7 | 2194 | |
32090b8e KR |
2195 | /* elf_build_phdrs() returns a (NULL-terminated) array of |
2196 | Elf_Internal_Phdrs */ | |
2197 | i_phdrp = elf_build_phdrs (abfd, i_ehdrp, i_shdrp, &i_ehdrp->e_phnum); | |
2198 | i_ehdrp->e_phoff = outbase; | |
2199 | outbase += i_ehdrp->e_phentsize * i_ehdrp->e_phnum; | |
2200 | #endif | |
244ffee7 | 2201 | } |
32090b8e | 2202 | else |
244ffee7 | 2203 | { |
32090b8e KR |
2204 | i_ehdrp->e_phentsize = 0; |
2205 | i_phdrp = 0; | |
2206 | i_ehdrp->e_phoff = 0; | |
244ffee7 JK |
2207 | } |
2208 | ||
32090b8e KR |
2209 | elf_tdata (abfd)->symtab_hdr.sh_name = bfd_add_to_strtab (abfd, shstrtab, |
2210 | ".symtab"); | |
2211 | elf_tdata (abfd)->strtab_hdr.sh_name = bfd_add_to_strtab (abfd, shstrtab, | |
2212 | ".strtab"); | |
2213 | elf_tdata (abfd)->shstrtab_hdr.sh_name = bfd_add_to_strtab (abfd, shstrtab, | |
2214 | ".shstrtab"); | |
6ec3bb6a ILT |
2215 | if (elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1 |
2216 | || elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1 | |
2217 | || elf_tdata (abfd)->shstrtab_hdr.sh_name == (unsigned int) -1) | |
2218 | return false; | |
2219 | ||
f035cc47 | 2220 | return true; |
244ffee7 JK |
2221 | } |
2222 | ||
b9d5cdf0 | 2223 | static boolean |
32090b8e KR |
2224 | swap_out_syms (abfd) |
2225 | bfd *abfd; | |
244ffee7 | 2226 | { |
9783e04a DM |
2227 | if (!elf_map_symbols (abfd)) |
2228 | return false; | |
244ffee7 | 2229 | |
32090b8e KR |
2230 | /* Dump out the symtabs. */ |
2231 | { | |
2232 | int symcount = bfd_get_symcount (abfd); | |
2233 | asymbol **syms = bfd_get_outsymbols (abfd); | |
2234 | struct strtab *stt = bfd_new_strtab (abfd); | |
2235 | Elf_Internal_Shdr *symtab_hdr; | |
2236 | Elf_Internal_Shdr *symstrtab_hdr; | |
2237 | Elf_External_Sym *outbound_syms; | |
2238 | int idx; | |
244ffee7 | 2239 | |
b9d5cdf0 DM |
2240 | if (!stt) |
2241 | return false; | |
32090b8e KR |
2242 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
2243 | symtab_hdr->sh_type = SHT_SYMTAB; | |
2244 | symtab_hdr->sh_entsize = sizeof (Elf_External_Sym); | |
2245 | symtab_hdr->sh_size = symtab_hdr->sh_entsize * (symcount + 1); | |
2246 | symtab_hdr->sh_info = elf_num_locals (abfd) + 1; | |
fa15568a | 2247 | symtab_hdr->sh_addralign = FILE_ALIGN; |
244ffee7 | 2248 | |
32090b8e KR |
2249 | symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr; |
2250 | symstrtab_hdr->sh_type = SHT_STRTAB; | |
244ffee7 | 2251 | |
32090b8e KR |
2252 | outbound_syms = (Elf_External_Sym *) |
2253 | bfd_alloc (abfd, (1 + symcount) * sizeof (Elf_External_Sym)); | |
9783e04a DM |
2254 | if (!outbound_syms) |
2255 | { | |
d1ad85a6 | 2256 | bfd_set_error (bfd_error_no_memory); |
9783e04a DM |
2257 | return false; |
2258 | } | |
32090b8e KR |
2259 | /* now generate the data (for "contents") */ |
2260 | { | |
2261 | /* Fill in zeroth symbol and swap it out. */ | |
2262 | Elf_Internal_Sym sym; | |
2263 | sym.st_name = 0; | |
2264 | sym.st_value = 0; | |
2265 | sym.st_size = 0; | |
2266 | sym.st_info = 0; | |
2267 | sym.st_other = 0; | |
2268 | sym.st_shndx = SHN_UNDEF; | |
2269 | elf_swap_symbol_out (abfd, &sym, outbound_syms); | |
244ffee7 | 2270 | } |
32090b8e KR |
2271 | for (idx = 0; idx < symcount; idx++) |
2272 | { | |
2273 | Elf_Internal_Sym sym; | |
2274 | bfd_vma value = syms[idx]->value; | |
71edd06d | 2275 | elf_symbol_type *type_ptr; |
244ffee7 | 2276 | |
32090b8e KR |
2277 | if (syms[idx]->flags & BSF_SECTION_SYM) |
2278 | /* Section symbols have no names. */ | |
2279 | sym.st_name = 0; | |
2280 | else | |
6ec3bb6a ILT |
2281 | { |
2282 | sym.st_name = bfd_add_to_strtab (abfd, stt, syms[idx]->name); | |
2283 | if (sym.st_name == (unsigned long) -1) | |
2284 | return false; | |
2285 | } | |
244ffee7 | 2286 | |
71edd06d ILT |
2287 | type_ptr = elf_symbol_from (abfd, syms[idx]); |
2288 | ||
32090b8e | 2289 | if (bfd_is_com_section (syms[idx]->section)) |
244ffee7 | 2290 | { |
32090b8e KR |
2291 | /* ELF common symbols put the alignment into the `value' field, |
2292 | and the size into the `size' field. This is backwards from | |
2293 | how BFD handles it, so reverse it here. */ | |
2294 | sym.st_size = value; | |
71edd06d | 2295 | sym.st_value = type_ptr ? type_ptr->internal_elf_sym.st_value : 16; |
d4fb8fce ILT |
2296 | sym.st_shndx = elf_section_from_bfd_section (abfd, |
2297 | syms[idx]->section); | |
244ffee7 JK |
2298 | } |
2299 | else | |
2300 | { | |
32090b8e KR |
2301 | asection *sec = syms[idx]->section; |
2302 | int shndx; | |
244ffee7 | 2303 | |
32090b8e KR |
2304 | if (sec->output_section) |
2305 | { | |
2306 | value += sec->output_offset; | |
2307 | sec = sec->output_section; | |
2308 | } | |
2309 | value += sec->vma; | |
2310 | sym.st_value = value; | |
e74034d8 | 2311 | sym.st_size = type_ptr ? type_ptr->internal_elf_sym.st_size : 0; |
32090b8e KR |
2312 | sym.st_shndx = shndx = elf_section_from_bfd_section (abfd, sec); |
2313 | if (shndx == -1) | |
2314 | { | |
2315 | asection *sec2; | |
2316 | /* Writing this would be a hell of a lot easier if we had | |
2317 | some decent documentation on bfd, and knew what to expect | |
2318 | of the library, and what to demand of applications. For | |
2319 | example, it appears that `objcopy' might not set the | |
2320 | section of a symbol to be a section that is actually in | |
2321 | the output file. */ | |
2322 | sec2 = bfd_get_section_by_name (abfd, sec->name); | |
850584ad | 2323 | BFD_ASSERT (sec2 != 0); |
32090b8e | 2324 | sym.st_shndx = shndx = elf_section_from_bfd_section (abfd, sec2); |
850584ad | 2325 | BFD_ASSERT (shndx != -1); |
32090b8e KR |
2326 | } |
2327 | } | |
244ffee7 | 2328 | |
32090b8e | 2329 | if (bfd_is_com_section (syms[idx]->section)) |
38a5f510 | 2330 | sym.st_info = ELF_ST_INFO (STB_GLOBAL, STT_OBJECT); |
badd23e3 | 2331 | else if (bfd_is_und_section (syms[idx]->section)) |
32090b8e | 2332 | sym.st_info = ELF_ST_INFO (STB_GLOBAL, STT_NOTYPE); |
32090b8e KR |
2333 | else if (syms[idx]->flags & BSF_SECTION_SYM) |
2334 | sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION); | |
2335 | else if (syms[idx]->flags & BSF_FILE) | |
2336 | sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE); | |
d24928c0 | 2337 | else |
32090b8e | 2338 | { |
d24928c0 KR |
2339 | int bind = STB_LOCAL; |
2340 | int type = STT_OBJECT; | |
2341 | unsigned int flags = syms[idx]->flags; | |
2342 | ||
2343 | if (flags & BSF_LOCAL) | |
2344 | bind = STB_LOCAL; | |
2345 | else if (flags & BSF_WEAK) | |
2346 | bind = STB_WEAK; | |
2347 | else if (flags & BSF_GLOBAL) | |
2348 | bind = STB_GLOBAL; | |
2349 | ||
2350 | if (flags & BSF_FUNCTION) | |
2351 | type = STT_FUNC; | |
2352 | ||
2353 | sym.st_info = ELF_ST_INFO (bind, type); | |
32090b8e | 2354 | } |
244ffee7 | 2355 | |
32090b8e KR |
2356 | sym.st_other = 0; |
2357 | elf_swap_symbol_out (abfd, &sym, | |
d24928c0 KR |
2358 | (outbound_syms |
2359 | + elf_sym_extra (abfd)[idx].elf_sym_num)); | |
32090b8e KR |
2360 | } |
2361 | ||
2362 | symtab_hdr->contents = (PTR) outbound_syms; | |
2363 | symstrtab_hdr->contents = (PTR) stt->tab; | |
2364 | symstrtab_hdr->sh_size = stt->length; | |
2365 | symstrtab_hdr->sh_type = SHT_STRTAB; | |
2366 | ||
2367 | symstrtab_hdr->sh_flags = 0; | |
2368 | symstrtab_hdr->sh_addr = 0; | |
2369 | symstrtab_hdr->sh_entsize = 0; | |
2370 | symstrtab_hdr->sh_link = 0; | |
2371 | symstrtab_hdr->sh_info = 0; | |
062189c6 | 2372 | symstrtab_hdr->sh_addralign = 1; |
32090b8e KR |
2373 | symstrtab_hdr->size = 0; |
2374 | } | |
2375 | ||
b9d5cdf0 | 2376 | return true; |
244ffee7 JK |
2377 | } |
2378 | ||
32090b8e KR |
2379 | static boolean |
2380 | write_shdrs_and_ehdr (abfd) | |
2381 | bfd *abfd; | |
244ffee7 | 2382 | { |
32090b8e KR |
2383 | Elf_External_Ehdr x_ehdr; /* Elf file header, external form */ |
2384 | Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */ | |
32090b8e KR |
2385 | Elf_External_Shdr *x_shdrp; /* Section header table, external form */ |
2386 | Elf_Internal_Shdr **i_shdrp; /* Section header table, internal form */ | |
68241b2b | 2387 | unsigned int count; |
32090b8e | 2388 | struct strtab *shstrtab; |
244ffee7 | 2389 | |
32090b8e KR |
2390 | i_ehdrp = elf_elfheader (abfd); |
2391 | i_shdrp = elf_elfsections (abfd); | |
2392 | shstrtab = elf_shstrtab (abfd); | |
2393 | ||
2394 | /* swap the header before spitting it out... */ | |
2395 | ||
2396 | #if DEBUG & 1 | |
2397 | elf_debug_file (i_ehdrp); | |
244ffee7 | 2398 | #endif |
32090b8e | 2399 | elf_swap_ehdr_out (abfd, i_ehdrp, &x_ehdr); |
4002f18a ILT |
2400 | if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0 |
2401 | || (bfd_write ((PTR) & x_ehdr, sizeof (x_ehdr), 1, abfd) | |
2402 | != sizeof (x_ehdr))) | |
2403 | return false; | |
244ffee7 | 2404 | |
32090b8e KR |
2405 | /* at this point we've concocted all the ELF sections... */ |
2406 | x_shdrp = (Elf_External_Shdr *) | |
2407 | bfd_alloc (abfd, sizeof (*x_shdrp) * (i_ehdrp->e_shnum)); | |
2408 | if (!x_shdrp) | |
2409 | { | |
d1ad85a6 | 2410 | bfd_set_error (bfd_error_no_memory); |
32090b8e KR |
2411 | return false; |
2412 | } | |
2413 | ||
2414 | for (count = 0; count < i_ehdrp->e_shnum; count++) | |
2415 | { | |
2416 | #if DEBUG & 2 | |
2417 | elf_debug_section (shstrtab->tab + i_shdrp[count]->sh_name, count, | |
2418 | i_shdrp[count]); | |
244ffee7 | 2419 | #endif |
32090b8e KR |
2420 | elf_swap_shdr_out (abfd, i_shdrp[count], x_shdrp + count); |
2421 | } | |
4002f18a ILT |
2422 | if (bfd_seek (abfd, (file_ptr) i_ehdrp->e_shoff, SEEK_SET) != 0 |
2423 | || (bfd_write ((PTR) x_shdrp, sizeof (*x_shdrp), i_ehdrp->e_shnum, abfd) | |
d909628b | 2424 | != sizeof (*x_shdrp) * i_ehdrp->e_shnum)) |
4002f18a ILT |
2425 | return false; |
2426 | ||
32090b8e | 2427 | /* need to dump the string table too... */ |
244ffee7 | 2428 | |
32090b8e KR |
2429 | return true; |
2430 | } | |
244ffee7 | 2431 | |
013dec1a ILT |
2432 | /* Assign file positions for all the reloc sections which are not part |
2433 | of the loadable file image. */ | |
2434 | ||
32090b8e KR |
2435 | static void |
2436 | assign_file_positions_for_relocs (abfd) | |
2437 | bfd *abfd; | |
2438 | { | |
013dec1a | 2439 | file_ptr off; |
68241b2b | 2440 | unsigned int i; |
013dec1a ILT |
2441 | Elf_Internal_Shdr **shdrpp; |
2442 | ||
2443 | off = elf_tdata (abfd)->next_file_pos; | |
2444 | ||
2445 | for (i = 1, shdrpp = elf_elfsections (abfd) + 1; | |
2446 | i < elf_elfheader (abfd)->e_shnum; | |
2447 | i++, shdrpp++) | |
32090b8e | 2448 | { |
013dec1a ILT |
2449 | Elf_Internal_Shdr *shdrp; |
2450 | ||
2451 | shdrp = *shdrpp; | |
2452 | if ((shdrp->sh_type == SHT_REL || shdrp->sh_type == SHT_RELA) | |
2453 | && shdrp->sh_offset == -1) | |
2454 | off = assign_file_position_for_section (shdrp, off, true); | |
32090b8e | 2455 | } |
013dec1a | 2456 | |
1c6042ee | 2457 | elf_tdata (abfd)->next_file_pos = off; |
32090b8e | 2458 | } |
244ffee7 | 2459 | |
32090b8e | 2460 | boolean |
1c6042ee ILT |
2461 | NAME(bfd_elf,write_object_contents) (abfd) |
2462 | bfd *abfd; | |
32090b8e | 2463 | { |
062189c6 | 2464 | struct elf_backend_data *bed = get_elf_backend_data (abfd); |
32090b8e KR |
2465 | Elf_Internal_Ehdr *i_ehdrp; |
2466 | Elf_Internal_Shdr **i_shdrp; | |
68241b2b | 2467 | unsigned int count; |
244ffee7 | 2468 | |
6ec3bb6a ILT |
2469 | if (! abfd->output_has_begun |
2470 | && ! elf_compute_section_file_positions (abfd, | |
2471 | (struct bfd_link_info *) NULL)) | |
2472 | return false; | |
244ffee7 | 2473 | |
32090b8e KR |
2474 | i_shdrp = elf_elfsections (abfd); |
2475 | i_ehdrp = elf_elfheader (abfd); | |
244ffee7 | 2476 | |
32090b8e | 2477 | bfd_map_over_sections (abfd, write_relocs, (PTR) 0); |
32090b8e | 2478 | assign_file_positions_for_relocs (abfd); |
244ffee7 | 2479 | |
32090b8e | 2480 | /* After writing the headers, we need to write the sections too... */ |
062189c6 | 2481 | for (count = 1; count < i_ehdrp->e_shnum; count++) |
e621c5cc | 2482 | { |
e621c5cc ILT |
2483 | if (bed->elf_backend_section_processing) |
2484 | (*bed->elf_backend_section_processing) (abfd, i_shdrp[count]); | |
2485 | if (i_shdrp[count]->contents) | |
2486 | { | |
4002f18a ILT |
2487 | if (bfd_seek (abfd, i_shdrp[count]->sh_offset, SEEK_SET) != 0 |
2488 | || (bfd_write (i_shdrp[count]->contents, i_shdrp[count]->sh_size, | |
2489 | 1, abfd) | |
2490 | != i_shdrp[count]->sh_size)) | |
2491 | return false; | |
e621c5cc ILT |
2492 | } |
2493 | } | |
062189c6 ILT |
2494 | |
2495 | if (bed->elf_backend_final_write_processing) | |
71edd06d | 2496 | (*bed->elf_backend_final_write_processing) (abfd, NULL); |
062189c6 | 2497 | |
32090b8e KR |
2498 | return write_shdrs_and_ehdr (abfd); |
2499 | } | |
244ffee7 | 2500 | |
32090b8e KR |
2501 | /* Given an index of a section, retrieve a pointer to it. Note |
2502 | that for our purposes, sections are indexed by {1, 2, ...} with | |
2503 | 0 being an illegal index. */ | |
244ffee7 | 2504 | |
32090b8e KR |
2505 | /* In the original, each ELF section went into exactly one BFD |
2506 | section. This doesn't really make sense, so we need a real mapping. | |
2507 | The mapping has to hide in the Elf_Internal_Shdr since asection | |
2508 | doesn't have anything like a tdata field... */ | |
244ffee7 | 2509 | |
2e03ce18 | 2510 | static asection * |
1c6042ee ILT |
2511 | section_from_elf_index (abfd, index) |
2512 | bfd *abfd; | |
2513 | unsigned int index; | |
32090b8e | 2514 | { |
badd23e3 | 2515 | /* @@ Is bfd_com_section_ptr really correct in all the places it could |
32090b8e | 2516 | be returned from this routine? */ |
244ffee7 | 2517 | |
32090b8e | 2518 | if (index == SHN_ABS) |
badd23e3 | 2519 | return bfd_com_section_ptr; /* not abs? */ |
32090b8e | 2520 | if (index == SHN_COMMON) |
badd23e3 | 2521 | return bfd_com_section_ptr; |
244ffee7 | 2522 | |
32090b8e | 2523 | if (index > elf_elfheader (abfd)->e_shnum) |
2e03ce18 | 2524 | return NULL; |
244ffee7 JK |
2525 | |
2526 | { | |
32090b8e | 2527 | Elf_Internal_Shdr *hdr = elf_elfsections (abfd)[index]; |
244ffee7 | 2528 | |
32090b8e | 2529 | switch (hdr->sh_type) |
244ffee7 | 2530 | { |
32090b8e KR |
2531 | /* ELF sections that map to BFD sections */ |
2532 | case SHT_PROGBITS: | |
2533 | case SHT_NOBITS: | |
013dec1a ILT |
2534 | case SHT_HASH: |
2535 | case SHT_DYNAMIC: | |
2e03ce18 ILT |
2536 | if (hdr->rawdata == NULL) |
2537 | { | |
2538 | if (! bfd_section_from_shdr (abfd, index)) | |
2539 | return NULL; | |
2540 | } | |
32090b8e | 2541 | return (struct sec *) hdr->rawdata; |
244ffee7 | 2542 | |
32090b8e | 2543 | default: |
badd23e3 | 2544 | return bfd_abs_section_ptr; |
244ffee7 | 2545 | } |
244ffee7 | 2546 | } |
32090b8e | 2547 | } |
244ffee7 | 2548 | |
32090b8e KR |
2549 | /* given a section, search the header to find them... */ |
2550 | static int | |
1c6042ee ILT |
2551 | elf_section_from_bfd_section (abfd, asect) |
2552 | bfd *abfd; | |
2553 | struct sec *asect; | |
32090b8e KR |
2554 | { |
2555 | Elf_Internal_Shdr **i_shdrp = elf_elfsections (abfd); | |
2556 | int index; | |
2557 | Elf_Internal_Shdr *hdr; | |
2558 | int maxindex = elf_elfheader (abfd)->e_shnum; | |
244ffee7 | 2559 | |
badd23e3 ILT |
2560 | if (asect->owner == NULL) |
2561 | { | |
2562 | if (bfd_is_abs_section (asect)) | |
2563 | return SHN_ABS; | |
2564 | if (bfd_is_com_section (asect)) | |
2565 | return SHN_COMMON; | |
2566 | if (bfd_is_und_section (asect)) | |
2567 | return SHN_UNDEF; | |
2568 | return -1; | |
2569 | } | |
2570 | ||
2571 | BFD_ASSERT (asect->owner == abfd); | |
244ffee7 | 2572 | |
32090b8e KR |
2573 | for (index = 0; index < maxindex; index++) |
2574 | { | |
2575 | hdr = i_shdrp[index]; | |
2576 | switch (hdr->sh_type) | |
2577 | { | |
2578 | /* ELF sections that map to BFD sections */ | |
2579 | case SHT_PROGBITS: | |
2580 | case SHT_NOBITS: | |
e621c5cc | 2581 | case SHT_NOTE: |
013dec1a ILT |
2582 | case SHT_HASH: |
2583 | case SHT_DYNAMIC: | |
fa15568a | 2584 | case SHT_DYNSYM: |
32090b8e KR |
2585 | if (hdr->rawdata) |
2586 | { | |
2587 | if (((struct sec *) (hdr->rawdata)) == asect) | |
2588 | return index; | |
2589 | } | |
2590 | break; | |
01383fb4 | 2591 | |
fa15568a ILT |
2592 | case SHT_REL: |
2593 | case SHT_RELA: | |
2594 | /* We sometimes map a reloc section to a BFD section. */ | |
e6667b2b | 2595 | if (hdr->sh_link != elf_onesymtab (abfd) |
fa15568a ILT |
2596 | && (asection *) hdr->rawdata == asect) |
2597 | return index; | |
2598 | break; | |
2599 | ||
01383fb4 | 2600 | case SHT_STRTAB: |
fa15568a ILT |
2601 | /* We map most string tables to BFD sections. */ |
2602 | if (index != elf_elfheader (abfd)->e_shstrndx | |
2603 | && index != elf_onesymtab (abfd) | |
2604 | && (asection *) hdr->rawdata == asect) | |
2605 | return index; | |
2606 | ||
01383fb4 | 2607 | /* FALL THROUGH */ |
32090b8e | 2608 | default: |
e621c5cc ILT |
2609 | { |
2610 | struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
2611 | ||
2612 | if (bed->elf_backend_section_from_bfd_section) | |
f035cc47 ILT |
2613 | { |
2614 | int retval; | |
2615 | ||
2616 | retval = index; | |
2617 | if ((*bed->elf_backend_section_from_bfd_section) | |
2618 | (abfd, hdr, asect, &retval)) | |
2619 | return retval; | |
2620 | } | |
e621c5cc | 2621 | } |
32090b8e KR |
2622 | break; |
2623 | } | |
2624 | } | |
2625 | return -1; | |
2626 | } | |
244ffee7 | 2627 | |
32090b8e KR |
2628 | /* given a symbol, return the bfd index for that symbol. */ |
2629 | static int | |
1c6042ee ILT |
2630 | elf_symbol_from_bfd_symbol (abfd, asym_ptr_ptr) |
2631 | bfd *abfd; | |
2632 | struct symbol_cache_entry **asym_ptr_ptr; | |
32090b8e KR |
2633 | { |
2634 | struct symbol_cache_entry *asym_ptr = *asym_ptr_ptr; | |
32090b8e | 2635 | int idx; |
d24928c0 | 2636 | flagword flags = asym_ptr->flags; |
32090b8e | 2637 | |
d24928c0 KR |
2638 | /* When gas creates relocations against local labels, it creates its |
2639 | own symbol for the section, but does put the symbol into the | |
e621c5cc ILT |
2640 | symbol chain, so udata is 0. When the linker is generating |
2641 | relocatable output, this section symbol may be for one of the | |
2642 | input sections rather than the output section. */ | |
d24928c0 KR |
2643 | if (asym_ptr->udata == (PTR) 0 |
2644 | && (flags & BSF_SECTION_SYM) | |
e621c5cc ILT |
2645 | && asym_ptr->section) |
2646 | { | |
2647 | int indx; | |
2648 | ||
2649 | if (asym_ptr->section->output_section != NULL) | |
2650 | indx = asym_ptr->section->output_section->index; | |
2651 | else | |
2652 | indx = asym_ptr->section->index; | |
2653 | if (elf_section_syms (abfd)[indx]) | |
2654 | asym_ptr->udata = elf_section_syms (abfd)[indx]->udata; | |
01383fb4 | 2655 | } |
e621c5cc | 2656 | |
d24928c0 | 2657 | if (asym_ptr->udata) |
1c6042ee | 2658 | idx = ((Elf_Sym_Extra *) asym_ptr->udata)->elf_sym_num; |
d24928c0 | 2659 | else |
32090b8e | 2660 | { |
32090b8e KR |
2661 | abort (); |
2662 | } | |
244ffee7 | 2663 | |
32090b8e | 2664 | #if DEBUG & 4 |
244ffee7 | 2665 | { |
244ffee7 | 2666 | |
32090b8e | 2667 | fprintf (stderr, |
d24928c0 | 2668 | "elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx %s\n", |
1c6042ee | 2669 | (long) asym_ptr, asym_ptr->name, idx, flags, elf_symbol_flags (flags)); |
32090b8e KR |
2670 | fflush (stderr); |
2671 | } | |
2672 | #endif | |
2673 | ||
2674 | return idx; | |
2675 | } | |
2676 | ||
cb71adf1 PS |
2677 | static long |
2678 | elf_slurp_symbol_table (abfd, symptrs, dynamic) | |
1c6042ee ILT |
2679 | bfd *abfd; |
2680 | asymbol **symptrs; /* Buffer for generated bfd symbols */ | |
cb71adf1 | 2681 | boolean dynamic; |
32090b8e | 2682 | { |
cb71adf1 | 2683 | Elf_Internal_Shdr *hdr; |
7d8aaf36 | 2684 | long symcount; /* Number of external ELF symbols */ |
32090b8e KR |
2685 | elf_symbol_type *sym; /* Pointer to current bfd symbol */ |
2686 | elf_symbol_type *symbase; /* Buffer for generated bfd symbols */ | |
2687 | Elf_Internal_Sym i_sym; | |
80425e6c | 2688 | Elf_External_Sym *x_symp = NULL; |
32090b8e | 2689 | |
32090b8e KR |
2690 | /* Read each raw ELF symbol, converting from external ELF form to |
2691 | internal ELF form, and then using the information to create a | |
2692 | canonical bfd symbol table entry. | |
244ffee7 | 2693 | |
32090b8e KR |
2694 | Note that we allocate the initial bfd canonical symbol buffer |
2695 | based on a one-to-one mapping of the ELF symbols to canonical | |
2696 | symbols. We actually use all the ELF symbols, so there will be no | |
2697 | space left over at the end. When we have all the symbols, we | |
2698 | build the caller's pointer vector. */ | |
244ffee7 | 2699 | |
cb71adf1 PS |
2700 | if (dynamic) |
2701 | hdr = &elf_tdata (abfd)->dynsymtab_hdr; | |
2702 | else | |
2703 | hdr = &elf_tdata (abfd)->symtab_hdr; | |
32090b8e | 2704 | if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) == -1) |
cb71adf1 | 2705 | return -1; |
244ffee7 | 2706 | |
32090b8e | 2707 | symcount = hdr->sh_size / sizeof (Elf_External_Sym); |
244ffee7 | 2708 | |
7d8aaf36 ILT |
2709 | if (symcount == 0) |
2710 | sym = symbase = NULL; | |
2711 | else | |
244ffee7 | 2712 | { |
7d8aaf36 | 2713 | long i; |
244ffee7 | 2714 | |
7d8aaf36 | 2715 | if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) == -1) |
cb71adf1 | 2716 | return -1; |
7d8aaf36 ILT |
2717 | |
2718 | symbase = ((elf_symbol_type *) | |
2719 | bfd_zalloc (abfd, symcount * sizeof (elf_symbol_type))); | |
2720 | if (symbase == (elf_symbol_type *) NULL) | |
32090b8e | 2721 | { |
7d8aaf36 | 2722 | bfd_set_error (bfd_error_no_memory); |
cb71adf1 | 2723 | return -1; |
32090b8e | 2724 | } |
7d8aaf36 ILT |
2725 | sym = symbase; |
2726 | ||
2727 | /* Temporarily allocate room for the raw ELF symbols. */ | |
2728 | x_symp = ((Elf_External_Sym *) | |
80425e6c | 2729 | malloc (symcount * sizeof (Elf_External_Sym))); |
25057836 | 2730 | if (x_symp == NULL && symcount != 0) |
80425e6c JK |
2731 | { |
2732 | bfd_set_error (bfd_error_no_memory); | |
2733 | goto error_return; | |
2734 | } | |
7d8aaf36 ILT |
2735 | |
2736 | if (bfd_read ((PTR) x_symp, sizeof (Elf_External_Sym), symcount, abfd) | |
2737 | != symcount * sizeof (Elf_External_Sym)) | |
25057836 | 2738 | goto error_return; |
7d8aaf36 ILT |
2739 | /* Skip first symbol, which is a null dummy. */ |
2740 | for (i = 1; i < symcount; i++) | |
32090b8e | 2741 | { |
7d8aaf36 ILT |
2742 | elf_swap_symbol_in (abfd, x_symp + i, &i_sym); |
2743 | memcpy (&sym->internal_elf_sym, &i_sym, sizeof (Elf_Internal_Sym)); | |
2744 | #ifdef ELF_KEEP_EXTSYM | |
2745 | memcpy (&sym->native_elf_sym, x_symp + i, sizeof (Elf_External_Sym)); | |
2746 | #endif | |
2747 | sym->symbol.the_bfd = abfd; | |
244ffee7 | 2748 | |
7d8aaf36 ILT |
2749 | sym->symbol.name = elf_string_from_elf_section (abfd, hdr->sh_link, |
2750 | i_sym.st_name); | |
244ffee7 | 2751 | |
7d8aaf36 | 2752 | sym->symbol.value = i_sym.st_value; |
244ffee7 | 2753 | |
6ec3bb6a | 2754 | if (i_sym.st_shndx > 0 && i_sym.st_shndx < SHN_LORESERVE) |
7d8aaf36 ILT |
2755 | { |
2756 | sym->symbol.section = section_from_elf_index (abfd, | |
2757 | i_sym.st_shndx); | |
2e03ce18 | 2758 | if (sym->symbol.section == NULL) |
013dec1a ILT |
2759 | { |
2760 | /* This symbol is in a section for which we did not | |
2761 | create a BFD section. Just use bfd_abs_section, | |
2762 | although it is wrong. FIXME. */ | |
badd23e3 | 2763 | sym->symbol.section = bfd_abs_section_ptr; |
013dec1a | 2764 | } |
7d8aaf36 ILT |
2765 | } |
2766 | else if (i_sym.st_shndx == SHN_ABS) | |
2767 | { | |
badd23e3 | 2768 | sym->symbol.section = bfd_abs_section_ptr; |
7d8aaf36 ILT |
2769 | } |
2770 | else if (i_sym.st_shndx == SHN_COMMON) | |
2771 | { | |
badd23e3 | 2772 | sym->symbol.section = bfd_com_section_ptr; |
7d8aaf36 ILT |
2773 | /* Elf puts the alignment into the `value' field, and |
2774 | the size into the `size' field. BFD wants to see the | |
2775 | size in the value field, and doesn't care (at the | |
2776 | moment) about the alignment. */ | |
2777 | sym->symbol.value = i_sym.st_size; | |
2778 | } | |
2779 | else if (i_sym.st_shndx == SHN_UNDEF) | |
2780 | { | |
badd23e3 | 2781 | sym->symbol.section = bfd_und_section_ptr; |
7d8aaf36 ILT |
2782 | } |
2783 | else | |
badd23e3 | 2784 | sym->symbol.section = bfd_abs_section_ptr; |
300adb31 | 2785 | |
7d8aaf36 | 2786 | sym->symbol.value -= sym->symbol.section->vma; |
244ffee7 | 2787 | |
7d8aaf36 ILT |
2788 | switch (ELF_ST_BIND (i_sym.st_info)) |
2789 | { | |
2790 | case STB_LOCAL: | |
2791 | sym->symbol.flags |= BSF_LOCAL; | |
2792 | break; | |
2793 | case STB_GLOBAL: | |
2794 | sym->symbol.flags |= BSF_GLOBAL; | |
2795 | break; | |
2796 | case STB_WEAK: | |
2797 | sym->symbol.flags |= BSF_WEAK; | |
2798 | break; | |
2799 | } | |
2800 | ||
2801 | switch (ELF_ST_TYPE (i_sym.st_info)) | |
2802 | { | |
2803 | case STT_SECTION: | |
2804 | sym->symbol.flags |= BSF_SECTION_SYM | BSF_DEBUGGING; | |
2805 | break; | |
2806 | case STT_FILE: | |
2807 | sym->symbol.flags |= BSF_FILE | BSF_DEBUGGING; | |
2808 | break; | |
2809 | case STT_FUNC: | |
2810 | sym->symbol.flags |= BSF_FUNCTION; | |
2811 | break; | |
2812 | } | |
2813 | ||
cb71adf1 PS |
2814 | if (dynamic) |
2815 | sym->symbol.flags |= BSF_DYNAMIC; | |
2816 | ||
7d8aaf36 ILT |
2817 | /* Do some backend-specific processing on this symbol. */ |
2818 | { | |
2819 | struct elf_backend_data *ebd = get_elf_backend_data (abfd); | |
2820 | if (ebd->elf_backend_symbol_processing) | |
2821 | (*ebd->elf_backend_symbol_processing) (abfd, &sym->symbol); | |
2822 | } | |
2823 | ||
2824 | sym++; | |
2825 | } | |
244ffee7 JK |
2826 | } |
2827 | ||
e621c5cc ILT |
2828 | /* Do some backend-specific processing on this symbol table. */ |
2829 | { | |
2830 | struct elf_backend_data *ebd = get_elf_backend_data (abfd); | |
2831 | if (ebd->elf_backend_symbol_table_processing) | |
2832 | (*ebd->elf_backend_symbol_table_processing) (abfd, symbase, symcount); | |
2833 | } | |
244ffee7 | 2834 | |
e621c5cc | 2835 | /* We rely on the zalloc to clear out the final symbol entry. */ |
244ffee7 | 2836 | |
cb71adf1 | 2837 | symcount = sym - symbase; |
32090b8e KR |
2838 | |
2839 | /* Fill in the user's symbol pointer vector if needed. */ | |
2840 | if (symptrs) | |
244ffee7 | 2841 | { |
cb71adf1 PS |
2842 | long l = symcount; |
2843 | ||
32090b8e | 2844 | sym = symbase; |
cb71adf1 | 2845 | while (l-- > 0) |
244ffee7 | 2846 | { |
32090b8e KR |
2847 | *symptrs++ = &sym->symbol; |
2848 | sym++; | |
244ffee7 | 2849 | } |
32090b8e | 2850 | *symptrs = 0; /* Final null pointer */ |
244ffee7 JK |
2851 | } |
2852 | ||
80425e6c JK |
2853 | if (x_symp != NULL) |
2854 | free (x_symp); | |
cb71adf1 | 2855 | return symcount; |
1c6042ee | 2856 | error_return: |
80425e6c JK |
2857 | if (x_symp != NULL) |
2858 | free (x_symp); | |
cb71adf1 | 2859 | return -1; |
244ffee7 JK |
2860 | } |
2861 | ||
32090b8e | 2862 | /* Return the number of bytes required to hold the symtab vector. |
244ffee7 | 2863 | |
32090b8e KR |
2864 | Note that we base it on the count plus 1, since we will null terminate |
2865 | the vector allocated based on this size. However, the ELF symbol table | |
2866 | always has a dummy entry as symbol #0, so it ends up even. */ | |
244ffee7 | 2867 | |
326e32d7 | 2868 | long |
1c6042ee ILT |
2869 | elf_get_symtab_upper_bound (abfd) |
2870 | bfd *abfd; | |
244ffee7 | 2871 | { |
326e32d7 ILT |
2872 | long symcount; |
2873 | long symtab_size; | |
1c6042ee | 2874 | Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->symtab_hdr; |
326e32d7 | 2875 | |
32090b8e | 2876 | symcount = hdr->sh_size / sizeof (Elf_External_Sym); |
d6439785 | 2877 | symtab_size = (symcount - 1 + 1) * (sizeof (asymbol *)); |
244ffee7 | 2878 | |
32090b8e KR |
2879 | return symtab_size; |
2880 | } | |
244ffee7 | 2881 | |
cb71adf1 PS |
2882 | long |
2883 | elf_get_dynamic_symtab_upper_bound (abfd) | |
2884 | bfd *abfd; | |
2885 | { | |
2886 | long symcount; | |
2887 | long symtab_size; | |
2888 | Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->dynsymtab_hdr; | |
2889 | ||
f9779aad ILT |
2890 | if (elf_dynsymtab (abfd) == 0) |
2891 | { | |
2892 | bfd_set_error (bfd_error_invalid_operation); | |
2893 | return -1; | |
2894 | } | |
2895 | ||
cb71adf1 PS |
2896 | symcount = hdr->sh_size / sizeof (Elf_External_Sym); |
2897 | symtab_size = (symcount - 1 + 1) * (sizeof (asymbol *)); | |
2898 | ||
2899 | return symtab_size; | |
2900 | } | |
2901 | ||
326e32d7 | 2902 | long |
32090b8e KR |
2903 | elf_get_reloc_upper_bound (abfd, asect) |
2904 | bfd *abfd; | |
2905 | sec_ptr asect; | |
2906 | { | |
51fc377b | 2907 | return (asect->reloc_count + 1) * sizeof (arelent *); |
244ffee7 JK |
2908 | } |
2909 | ||
ea617174 ILT |
2910 | /* Read in and swap the external relocs. */ |
2911 | ||
32090b8e | 2912 | static boolean |
ea617174 | 2913 | elf_slurp_reloc_table (abfd, asect, symbols) |
1c6042ee | 2914 | bfd *abfd; |
ea617174 | 2915 | asection *asect; |
1c6042ee | 2916 | asymbol **symbols; |
244ffee7 | 2917 | { |
ea617174 ILT |
2918 | struct elf_backend_data * const ebd = get_elf_backend_data (abfd); |
2919 | struct bfd_elf_section_data * const d = elf_section_data (asect); | |
2920 | PTR allocated = NULL; | |
2921 | bfd_byte *native_relocs; | |
2922 | arelent *relents; | |
2923 | arelent *relent; | |
2924 | unsigned int i; | |
2925 | int entsize; | |
244ffee7 | 2926 | |
ea617174 | 2927 | if (asect->relocation != NULL) |
32090b8e | 2928 | return true; |
244ffee7 | 2929 | |
ea617174 ILT |
2930 | BFD_ASSERT (asect->rel_filepos == d->rel_hdr.sh_offset |
2931 | && (asect->reloc_count | |
2932 | == d->rel_hdr.sh_size / d->rel_hdr.sh_entsize)); | |
2933 | ||
2934 | native_relocs = (bfd_byte *) elf_section_data (asect)->relocs; | |
2935 | if (native_relocs == NULL) | |
9783e04a | 2936 | { |
ea617174 ILT |
2937 | allocated = (PTR) malloc (d->rel_hdr.sh_size); |
2938 | if (allocated == NULL) | |
2939 | { | |
2940 | bfd_set_error (bfd_error_no_memory); | |
2941 | goto error_return; | |
2942 | } | |
2943 | ||
2944 | if (bfd_seek (abfd, asect->rel_filepos, SEEK_SET) != 0 | |
2945 | || (bfd_read (allocated, 1, d->rel_hdr.sh_size, abfd) | |
2946 | != d->rel_hdr.sh_size)) | |
2947 | goto error_return; | |
244ffee7 | 2948 | |
ea617174 ILT |
2949 | native_relocs = (bfd_byte *) allocated; |
2950 | } | |
32090b8e | 2951 | |
ea617174 ILT |
2952 | relents = ((arelent *) |
2953 | bfd_alloc (abfd, asect->reloc_count * sizeof (arelent))); | |
2954 | if (relents == NULL) | |
6a3eb9b6 | 2955 | { |
d1ad85a6 | 2956 | bfd_set_error (bfd_error_no_memory); |
ea617174 | 2957 | goto error_return; |
6a3eb9b6 | 2958 | } |
244ffee7 | 2959 | |
ea617174 ILT |
2960 | entsize = d->rel_hdr.sh_entsize; |
2961 | BFD_ASSERT (entsize == sizeof (Elf_External_Rel) | |
2962 | || entsize == sizeof (Elf_External_Rela)); | |
244ffee7 | 2963 | |
ea617174 ILT |
2964 | for (i = 0, relent = relents; |
2965 | i < asect->reloc_count; | |
2966 | i++, relent++, native_relocs += entsize) | |
2967 | { | |
2968 | Elf_Internal_Rela rela; | |
2969 | Elf_Internal_Rel rel; | |
244ffee7 | 2970 | |
ea617174 ILT |
2971 | if (entsize == sizeof (Elf_External_Rela)) |
2972 | elf_swap_reloca_in (abfd, (Elf_External_Rela *) native_relocs, &rela); | |
32090b8e KR |
2973 | else |
2974 | { | |
ea617174 ILT |
2975 | elf_swap_reloc_in (abfd, (Elf_External_Rel *) native_relocs, &rel); |
2976 | rela.r_offset = rel.r_offset; | |
2977 | rela.r_info = rel.r_info; | |
2978 | rela.r_addend = 0; | |
32090b8e | 2979 | } |
7b8106b4 | 2980 | |
ea617174 ILT |
2981 | /* The address of an ELF reloc is section relative for an object |
2982 | file, and absolute for an executable file or shared library. | |
2983 | The address of a BFD reloc is always section relative. */ | |
2984 | if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0) | |
2985 | relent->address = rela.r_offset; | |
2986 | else | |
2987 | relent->address = rela.r_offset - asect->vma; | |
2988 | ||
2989 | if (ELF_R_SYM (rela.r_info) == 0) | |
2990 | relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; | |
7b8106b4 ILT |
2991 | else |
2992 | { | |
ea617174 | 2993 | asymbol **ps, *s; |
7b8106b4 | 2994 | |
ea617174 ILT |
2995 | ps = symbols + ELF_R_SYM (rela.r_info) - 1; |
2996 | s = *ps; | |
7b8106b4 | 2997 | |
ea617174 ILT |
2998 | /* Canonicalize ELF section symbols. FIXME: Why? */ |
2999 | if ((s->flags & BSF_SECTION_SYM) == 0) | |
3000 | relent->sym_ptr_ptr = ps; | |
3001 | else | |
3002 | relent->sym_ptr_ptr = s->section->symbol_ptr_ptr; | |
7b8106b4 | 3003 | } |
244ffee7 | 3004 | |
ea617174 ILT |
3005 | relent->addend = rela.r_addend; |
3006 | ||
3007 | if (entsize == sizeof (Elf_External_Rela)) | |
3008 | (*ebd->elf_info_to_howto) (abfd, relent, &rela); | |
3009 | else | |
3010 | (*ebd->elf_info_to_howto_rel) (abfd, relent, &rel); | |
32090b8e | 3011 | } |
244ffee7 | 3012 | |
ea617174 ILT |
3013 | asect->relocation = relents; |
3014 | ||
3015 | if (allocated != NULL) | |
3016 | free (allocated); | |
3017 | ||
32090b8e | 3018 | return true; |
ea617174 ILT |
3019 | |
3020 | error_return: | |
3021 | if (allocated != NULL) | |
3022 | free (allocated); | |
3023 | return false; | |
32090b8e | 3024 | } |
238ac6ec | 3025 | |
32090b8e KR |
3026 | #ifdef DEBUG |
3027 | static void | |
3028 | elf_debug_section (str, num, hdr) | |
3029 | char *str; | |
3030 | int num; | |
3031 | Elf_Internal_Shdr *hdr; | |
3032 | { | |
3033 | fprintf (stderr, "\nSection#%d '%s' 0x%.8lx\n", num, str, (long) hdr); | |
3034 | fprintf (stderr, | |
3035 | "sh_name = %ld\tsh_type = %ld\tsh_flags = %ld\n", | |
3036 | (long) hdr->sh_name, | |
3037 | (long) hdr->sh_type, | |
3038 | (long) hdr->sh_flags); | |
3039 | fprintf (stderr, | |
3040 | "sh_addr = %ld\tsh_offset = %ld\tsh_size = %ld\n", | |
3041 | (long) hdr->sh_addr, | |
3042 | (long) hdr->sh_offset, | |
3043 | (long) hdr->sh_size); | |
3044 | fprintf (stderr, | |
3045 | "sh_link = %ld\tsh_info = %ld\tsh_addralign = %ld\n", | |
3046 | (long) hdr->sh_link, | |
3047 | (long) hdr->sh_info, | |
3048 | (long) hdr->sh_addralign); | |
3049 | fprintf (stderr, "sh_entsize = %ld\n", | |
3050 | (long) hdr->sh_entsize); | |
3051 | fprintf (stderr, "rawdata = 0x%.8lx\n", (long) hdr->rawdata); | |
3052 | fprintf (stderr, "contents = 0x%.8lx\n", (long) hdr->contents); | |
3053 | fprintf (stderr, "size = %ld\n", (long) hdr->size); | |
3054 | fflush (stderr); | |
3055 | } | |
244ffee7 | 3056 | |
32090b8e KR |
3057 | static void |
3058 | elf_debug_file (ehdrp) | |
3059 | Elf_Internal_Ehdr *ehdrp; | |
3060 | { | |
3061 | fprintf (stderr, "e_entry = 0x%.8lx\n", (long) ehdrp->e_entry); | |
3062 | fprintf (stderr, "e_phoff = %ld\n", (long) ehdrp->e_phoff); | |
3063 | fprintf (stderr, "e_phnum = %ld\n", (long) ehdrp->e_phnum); | |
3064 | fprintf (stderr, "e_phentsize = %ld\n", (long) ehdrp->e_phentsize); | |
3065 | fprintf (stderr, "e_shoff = %ld\n", (long) ehdrp->e_shoff); | |
3066 | fprintf (stderr, "e_shnum = %ld\n", (long) ehdrp->e_shnum); | |
3067 | fprintf (stderr, "e_shentsize = %ld\n", (long) ehdrp->e_shentsize); | |
244ffee7 | 3068 | } |
32090b8e | 3069 | #endif |
244ffee7 | 3070 | |
ea617174 | 3071 | /* Canonicalize the relocs. */ |
244ffee7 | 3072 | |
326e32d7 | 3073 | long |
32090b8e KR |
3074 | elf_canonicalize_reloc (abfd, section, relptr, symbols) |
3075 | bfd *abfd; | |
3076 | sec_ptr section; | |
3077 | arelent **relptr; | |
3078 | asymbol **symbols; | |
3079 | { | |
ea617174 ILT |
3080 | arelent *tblptr; |
3081 | unsigned int i; | |
32090b8e | 3082 | |
ea617174 ILT |
3083 | if (! elf_slurp_reloc_table (abfd, section, symbols)) |
3084 | return -1; | |
32090b8e KR |
3085 | |
3086 | tblptr = section->relocation; | |
ea617174 | 3087 | for (i = 0; i < section->reloc_count; i++) |
32090b8e KR |
3088 | *relptr++ = tblptr++; |
3089 | ||
ea617174 ILT |
3090 | *relptr = NULL; |
3091 | ||
32090b8e KR |
3092 | return section->reloc_count; |
3093 | } | |
3094 | ||
326e32d7 | 3095 | long |
1c6042ee ILT |
3096 | elf_get_symtab (abfd, alocation) |
3097 | bfd *abfd; | |
3098 | asymbol **alocation; | |
32090b8e | 3099 | { |
cb71adf1 PS |
3100 | long symcount = elf_slurp_symbol_table (abfd, alocation, false); |
3101 | ||
3102 | if (symcount >= 0) | |
3103 | bfd_get_symcount (abfd) = symcount; | |
3104 | return symcount; | |
3105 | } | |
326e32d7 | 3106 | |
cb71adf1 PS |
3107 | long |
3108 | elf_canonicalize_dynamic_symtab (abfd, alocation) | |
3109 | bfd *abfd; | |
3110 | asymbol **alocation; | |
3111 | { | |
3112 | return elf_slurp_symbol_table (abfd, alocation, true); | |
32090b8e KR |
3113 | } |
3114 | ||
3115 | asymbol * | |
1c6042ee ILT |
3116 | elf_make_empty_symbol (abfd) |
3117 | bfd *abfd; | |
32090b8e KR |
3118 | { |
3119 | elf_symbol_type *newsym; | |
3120 | ||
3121 | newsym = (elf_symbol_type *) bfd_zalloc (abfd, sizeof (elf_symbol_type)); | |
3122 | if (!newsym) | |
3123 | { | |
d1ad85a6 | 3124 | bfd_set_error (bfd_error_no_memory); |
32090b8e KR |
3125 | return NULL; |
3126 | } | |
3127 | else | |
3128 | { | |
3129 | newsym->symbol.the_bfd = abfd; | |
3130 | return &newsym->symbol; | |
244ffee7 | 3131 | } |
32090b8e | 3132 | } |
244ffee7 | 3133 | |
32090b8e | 3134 | void |
1c6042ee ILT |
3135 | elf_get_symbol_info (ignore_abfd, symbol, ret) |
3136 | bfd *ignore_abfd; | |
3137 | asymbol *symbol; | |
3138 | symbol_info *ret; | |
32090b8e KR |
3139 | { |
3140 | bfd_symbol_info (symbol, ret); | |
3141 | } | |
244ffee7 | 3142 | |
32090b8e | 3143 | void |
1c6042ee ILT |
3144 | elf_print_symbol (ignore_abfd, filep, symbol, how) |
3145 | bfd *ignore_abfd; | |
3146 | PTR filep; | |
3147 | asymbol *symbol; | |
3148 | bfd_print_symbol_type how; | |
32090b8e KR |
3149 | { |
3150 | FILE *file = (FILE *) filep; | |
3151 | switch (how) | |
3152 | { | |
3153 | case bfd_print_symbol_name: | |
3154 | fprintf (file, "%s", symbol->name); | |
3155 | break; | |
3156 | case bfd_print_symbol_more: | |
3157 | fprintf (file, "elf "); | |
3158 | fprintf_vma (file, symbol->value); | |
3159 | fprintf (file, " %lx", (long) symbol->flags); | |
3160 | break; | |
3161 | case bfd_print_symbol_all: | |
3162 | { | |
3163 | CONST char *section_name; | |
3164 | section_name = symbol->section ? symbol->section->name : "(*none*)"; | |
3165 | bfd_print_symbol_vandf ((PTR) file, symbol); | |
3166 | fprintf (file, " %s\t%s", | |
3167 | section_name, | |
3168 | symbol->name); | |
3169 | } | |
3170 | break; | |
3171 | } | |
244ffee7 | 3172 | |
32090b8e | 3173 | } |
244ffee7 | 3174 | |
32090b8e | 3175 | alent * |
1c6042ee ILT |
3176 | elf_get_lineno (ignore_abfd, symbol) |
3177 | bfd *ignore_abfd; | |
3178 | asymbol *symbol; | |
32090b8e KR |
3179 | { |
3180 | fprintf (stderr, "elf_get_lineno unimplemented\n"); | |
3181 | fflush (stderr); | |
3182 | BFD_FAIL (); | |
3183 | return NULL; | |
3184 | } | |
3185 | ||
3186 | boolean | |
1c6042ee ILT |
3187 | elf_set_arch_mach (abfd, arch, machine) |
3188 | bfd *abfd; | |
3189 | enum bfd_architecture arch; | |
3190 | unsigned long machine; | |
32090b8e | 3191 | { |
80a903c9 ILT |
3192 | /* If this isn't the right architecture for this backend, and this |
3193 | isn't the generic backend, fail. */ | |
3194 | if (arch != get_elf_backend_data (abfd)->arch | |
3195 | && arch != bfd_arch_unknown | |
3196 | && get_elf_backend_data (abfd)->arch != bfd_arch_unknown) | |
3197 | return false; | |
3198 | ||
3199 | return bfd_default_set_arch_mach (abfd, arch, machine); | |
32090b8e | 3200 | } |
244ffee7 | 3201 | |
32090b8e | 3202 | boolean |
1c6042ee ILT |
3203 | elf_find_nearest_line (abfd, |
3204 | section, | |
3205 | symbols, | |
3206 | offset, | |
3207 | filename_ptr, | |
3208 | functionname_ptr, | |
3209 | line_ptr) | |
3210 | bfd *abfd; | |
3211 | asection *section; | |
3212 | asymbol **symbols; | |
3213 | bfd_vma offset; | |
3214 | CONST char **filename_ptr; | |
3215 | CONST char **functionname_ptr; | |
3216 | unsigned int *line_ptr; | |
32090b8e KR |
3217 | { |
3218 | return false; | |
244ffee7 JK |
3219 | } |
3220 | ||
32090b8e | 3221 | int |
1c6042ee ILT |
3222 | elf_sizeof_headers (abfd, reloc) |
3223 | bfd *abfd; | |
3224 | boolean reloc; | |
32090b8e | 3225 | { |
013dec1a ILT |
3226 | int ret; |
3227 | ||
3228 | ret = sizeof (Elf_External_Ehdr); | |
3229 | if (! reloc) | |
3230 | ret += get_program_header_size (abfd); | |
3231 | return ret; | |
32090b8e | 3232 | } |
244ffee7 | 3233 | |
32090b8e | 3234 | boolean |
1c6042ee ILT |
3235 | elf_set_section_contents (abfd, section, location, offset, count) |
3236 | bfd *abfd; | |
3237 | sec_ptr section; | |
3238 | PTR location; | |
3239 | file_ptr offset; | |
3240 | bfd_size_type count; | |
244ffee7 | 3241 | { |
244ffee7 JK |
3242 | Elf_Internal_Shdr *hdr; |
3243 | ||
6ec3bb6a ILT |
3244 | if (! abfd->output_has_begun |
3245 | && ! elf_compute_section_file_positions (abfd, | |
3246 | (struct bfd_link_info *) NULL)) | |
3247 | return false; | |
244ffee7 | 3248 | |
1c6042ee | 3249 | hdr = &elf_section_data (section)->this_hdr; |
244ffee7 | 3250 | |
32090b8e KR |
3251 | if (bfd_seek (abfd, hdr->sh_offset + offset, SEEK_SET) == -1) |
3252 | return false; | |
3253 | if (bfd_write (location, 1, count, abfd) != count) | |
3254 | return false; | |
3255 | ||
3256 | return true; | |
3257 | } | |
3258 | ||
3259 | void | |
1c6042ee ILT |
3260 | elf_no_info_to_howto (abfd, cache_ptr, dst) |
3261 | bfd *abfd; | |
3262 | arelent *cache_ptr; | |
3263 | Elf_Internal_Rela *dst; | |
244ffee7 | 3264 | { |
32090b8e KR |
3265 | fprintf (stderr, "elf RELA relocation support for target machine unimplemented\n"); |
3266 | fflush (stderr); | |
3267 | BFD_FAIL (); | |
244ffee7 JK |
3268 | } |
3269 | ||
32090b8e | 3270 | void |
1c6042ee ILT |
3271 | elf_no_info_to_howto_rel (abfd, cache_ptr, dst) |
3272 | bfd *abfd; | |
3273 | arelent *cache_ptr; | |
3274 | Elf_Internal_Rel *dst; | |
244ffee7 | 3275 | { |
32090b8e KR |
3276 | fprintf (stderr, "elf REL relocation support for target machine unimplemented\n"); |
3277 | fflush (stderr); | |
3278 | BFD_FAIL (); | |
3279 | } | |
32090b8e | 3280 | \f |
1c6042ee | 3281 | |
32090b8e | 3282 | /* Core file support */ |
244ffee7 | 3283 | |
32090b8e KR |
3284 | #ifdef HAVE_PROCFS /* Some core file support requires host /proc files */ |
3285 | #include <sys/procfs.h> | |
3286 | #else | |
2e03ce18 ILT |
3287 | #define bfd_prstatus(abfd, descdata, descsz, filepos) true |
3288 | #define bfd_fpregset(abfd, descdata, descsz, filepos) true | |
3289 | #define bfd_prpsinfo(abfd, descdata, descsz, filepos) true | |
32090b8e | 3290 | #endif |
244ffee7 | 3291 | |
32090b8e | 3292 | #ifdef HAVE_PROCFS |
244ffee7 | 3293 | |
2e03ce18 | 3294 | static boolean |
1c6042ee ILT |
3295 | bfd_prstatus (abfd, descdata, descsz, filepos) |
3296 | bfd *abfd; | |
3297 | char *descdata; | |
3298 | int descsz; | |
3299 | long filepos; | |
32090b8e KR |
3300 | { |
3301 | asection *newsect; | |
3302 | prstatus_t *status = (prstatus_t *) 0; | |
244ffee7 | 3303 | |
32090b8e | 3304 | if (descsz == sizeof (prstatus_t)) |
244ffee7 | 3305 | { |
32090b8e | 3306 | newsect = bfd_make_section (abfd, ".reg"); |
2e03ce18 ILT |
3307 | if (newsect == NULL) |
3308 | return false; | |
32090b8e KR |
3309 | newsect->_raw_size = sizeof (status->pr_reg); |
3310 | newsect->filepos = filepos + (long) &status->pr_reg; | |
57a814a9 | 3311 | newsect->flags = SEC_HAS_CONTENTS; |
32090b8e KR |
3312 | newsect->alignment_power = 2; |
3313 | if ((core_prstatus (abfd) = bfd_alloc (abfd, descsz)) != NULL) | |
3314 | { | |
3315 | memcpy (core_prstatus (abfd), descdata, descsz); | |
3316 | } | |
244ffee7 | 3317 | } |
2e03ce18 | 3318 | return true; |
32090b8e | 3319 | } |
244ffee7 | 3320 | |
32090b8e | 3321 | /* Stash a copy of the prpsinfo structure away for future use. */ |
244ffee7 | 3322 | |
2e03ce18 | 3323 | static boolean |
1c6042ee ILT |
3324 | bfd_prpsinfo (abfd, descdata, descsz, filepos) |
3325 | bfd *abfd; | |
3326 | char *descdata; | |
3327 | int descsz; | |
3328 | long filepos; | |
32090b8e | 3329 | { |
32090b8e KR |
3330 | if (descsz == sizeof (prpsinfo_t)) |
3331 | { | |
2e03ce18 | 3332 | if ((core_prpsinfo (abfd) = bfd_alloc (abfd, descsz)) == NULL) |
244ffee7 | 3333 | { |
2e03ce18 ILT |
3334 | bfd_set_error (bfd_error_no_memory); |
3335 | return false; | |
244ffee7 | 3336 | } |
2e03ce18 | 3337 | memcpy (core_prpsinfo (abfd), descdata, descsz); |
244ffee7 | 3338 | } |
2e03ce18 | 3339 | return true; |
244ffee7 JK |
3340 | } |
3341 | ||
2e03ce18 | 3342 | static boolean |
1c6042ee ILT |
3343 | bfd_fpregset (abfd, descdata, descsz, filepos) |
3344 | bfd *abfd; | |
3345 | char *descdata; | |
3346 | int descsz; | |
3347 | long filepos; | |
244ffee7 | 3348 | { |
32090b8e | 3349 | asection *newsect; |
244ffee7 | 3350 | |
32090b8e | 3351 | newsect = bfd_make_section (abfd, ".reg2"); |
2e03ce18 ILT |
3352 | if (newsect == NULL) |
3353 | return false; | |
32090b8e KR |
3354 | newsect->_raw_size = descsz; |
3355 | newsect->filepos = filepos; | |
57a814a9 | 3356 | newsect->flags = SEC_HAS_CONTENTS; |
32090b8e | 3357 | newsect->alignment_power = 2; |
2e03ce18 | 3358 | return true; |
6a3eb9b6 | 3359 | } |
244ffee7 | 3360 | |
32090b8e KR |
3361 | #endif /* HAVE_PROCFS */ |
3362 | ||
3363 | /* Return a pointer to the args (including the command name) that were | |
3364 | seen by the program that generated the core dump. Note that for | |
3365 | some reason, a spurious space is tacked onto the end of the args | |
3366 | in some (at least one anyway) implementations, so strip it off if | |
3367 | it exists. */ | |
3368 | ||
3369 | char * | |
1c6042ee ILT |
3370 | elf_core_file_failing_command (abfd) |
3371 | bfd *abfd; | |
244ffee7 | 3372 | { |
32090b8e KR |
3373 | #ifdef HAVE_PROCFS |
3374 | if (core_prpsinfo (abfd)) | |
3375 | { | |
3376 | prpsinfo_t *p = core_prpsinfo (abfd); | |
3377 | char *scan = p->pr_psargs; | |
3378 | while (*scan++) | |
3379 | {; | |
3380 | } | |
3381 | scan -= 2; | |
3382 | if ((scan > p->pr_psargs) && (*scan == ' ')) | |
3383 | { | |
3384 | *scan = '\000'; | |
3385 | } | |
3386 | return p->pr_psargs; | |
3387 | } | |
3388 | #endif | |
3389 | return NULL; | |
3390 | } | |
244ffee7 | 3391 | |
32090b8e KR |
3392 | /* Return the number of the signal that caused the core dump. Presumably, |
3393 | since we have a core file, we got a signal of some kind, so don't bother | |
3394 | checking the other process status fields, just return the signal number. | |
3395 | */ | |
244ffee7 | 3396 | |
32090b8e | 3397 | int |
1c6042ee ILT |
3398 | elf_core_file_failing_signal (abfd) |
3399 | bfd *abfd; | |
32090b8e KR |
3400 | { |
3401 | #ifdef HAVE_PROCFS | |
3402 | if (core_prstatus (abfd)) | |
3403 | { | |
3404 | return ((prstatus_t *) (core_prstatus (abfd)))->pr_cursig; | |
3405 | } | |
3406 | #endif | |
3407 | return -1; | |
3408 | } | |
244ffee7 | 3409 | |
32090b8e KR |
3410 | /* Check to see if the core file could reasonably be expected to have |
3411 | come for the current executable file. Note that by default we return | |
3412 | true unless we find something that indicates that there might be a | |
3413 | problem. | |
3414 | */ | |
244ffee7 | 3415 | |
32090b8e | 3416 | boolean |
1c6042ee ILT |
3417 | elf_core_file_matches_executable_p (core_bfd, exec_bfd) |
3418 | bfd *core_bfd; | |
3419 | bfd *exec_bfd; | |
32090b8e KR |
3420 | { |
3421 | #ifdef HAVE_PROCFS | |
3422 | char *corename; | |
3423 | char *execname; | |
3424 | #endif | |
244ffee7 | 3425 | |
32090b8e KR |
3426 | /* First, xvecs must match since both are ELF files for the same target. */ |
3427 | ||
3428 | if (core_bfd->xvec != exec_bfd->xvec) | |
244ffee7 | 3429 | { |
d1ad85a6 | 3430 | bfd_set_error (bfd_error_system_call); |
244ffee7 JK |
3431 | return false; |
3432 | } | |
3433 | ||
32090b8e | 3434 | #ifdef HAVE_PROCFS |
244ffee7 | 3435 | |
32090b8e KR |
3436 | /* If no prpsinfo, just return true. Otherwise, grab the last component |
3437 | of the exec'd pathname from the prpsinfo. */ | |
244ffee7 | 3438 | |
32090b8e | 3439 | if (core_prpsinfo (core_bfd)) |
244ffee7 | 3440 | { |
32090b8e KR |
3441 | corename = (((struct prpsinfo *) core_prpsinfo (core_bfd))->pr_fname); |
3442 | } | |
3443 | else | |
3444 | { | |
3445 | return true; | |
3446 | } | |
244ffee7 | 3447 | |
32090b8e | 3448 | /* Find the last component of the executable pathname. */ |
244ffee7 | 3449 | |
32090b8e KR |
3450 | if ((execname = strrchr (exec_bfd->filename, '/')) != NULL) |
3451 | { | |
3452 | execname++; | |
3453 | } | |
3454 | else | |
3455 | { | |
3456 | execname = (char *) exec_bfd->filename; | |
3457 | } | |
244ffee7 | 3458 | |
32090b8e | 3459 | /* See if they match */ |
244ffee7 | 3460 | |
32090b8e | 3461 | return strcmp (execname, corename) ? false : true; |
244ffee7 | 3462 | |
32090b8e | 3463 | #else |
244ffee7 | 3464 | |
244ffee7 | 3465 | return true; |
244ffee7 | 3466 | |
32090b8e KR |
3467 | #endif /* HAVE_PROCFS */ |
3468 | } | |
244ffee7 | 3469 | |
32090b8e KR |
3470 | /* ELF core files contain a segment of type PT_NOTE, that holds much of |
3471 | the information that would normally be available from the /proc interface | |
3472 | for the process, at the time the process dumped core. Currently this | |
3473 | includes copies of the prstatus, prpsinfo, and fpregset structures. | |
244ffee7 | 3474 | |
32090b8e KR |
3475 | Since these structures are potentially machine dependent in size and |
3476 | ordering, bfd provides two levels of support for them. The first level, | |
3477 | available on all machines since it does not require that the host | |
3478 | have /proc support or the relevant include files, is to create a bfd | |
3479 | section for each of the prstatus, prpsinfo, and fpregset structures, | |
3480 | without any interpretation of their contents. With just this support, | |
3481 | the bfd client will have to interpret the structures itself. Even with | |
3482 | /proc support, it might want these full structures for it's own reasons. | |
244ffee7 | 3483 | |
32090b8e KR |
3484 | In the second level of support, where HAVE_PROCFS is defined, bfd will |
3485 | pick apart the structures to gather some additional information that | |
3486 | clients may want, such as the general register set, the name of the | |
3487 | exec'ed file and its arguments, the signal (if any) that caused the | |
3488 | core dump, etc. | |
244ffee7 | 3489 | |
32090b8e | 3490 | */ |
244ffee7 | 3491 | |
32090b8e | 3492 | static boolean |
1c6042ee ILT |
3493 | elf_corefile_note (abfd, hdr) |
3494 | bfd *abfd; | |
3495 | Elf_Internal_Phdr *hdr; | |
244ffee7 | 3496 | { |
32090b8e KR |
3497 | Elf_External_Note *x_note_p; /* Elf note, external form */ |
3498 | Elf_Internal_Note i_note; /* Elf note, internal form */ | |
3499 | char *buf = NULL; /* Entire note segment contents */ | |
3500 | char *namedata; /* Name portion of the note */ | |
3501 | char *descdata; /* Descriptor portion of the note */ | |
3502 | char *sectname; /* Name to use for new section */ | |
3503 | long filepos; /* File offset to descriptor data */ | |
3504 | asection *newsect; | |
3505 | ||
3506 | if (hdr->p_filesz > 0 | |
b9d5cdf0 | 3507 | && (buf = (char *) malloc (hdr->p_filesz)) != NULL |
32090b8e KR |
3508 | && bfd_seek (abfd, hdr->p_offset, SEEK_SET) != -1 |
3509 | && bfd_read ((PTR) buf, hdr->p_filesz, 1, abfd) == hdr->p_filesz) | |
3510 | { | |
3511 | x_note_p = (Elf_External_Note *) buf; | |
3512 | while ((char *) x_note_p < (buf + hdr->p_filesz)) | |
3513 | { | |
3514 | i_note.namesz = bfd_h_get_32 (abfd, (bfd_byte *) x_note_p->namesz); | |
3515 | i_note.descsz = bfd_h_get_32 (abfd, (bfd_byte *) x_note_p->descsz); | |
3516 | i_note.type = bfd_h_get_32 (abfd, (bfd_byte *) x_note_p->type); | |
3517 | namedata = x_note_p->name; | |
3518 | descdata = namedata + BFD_ALIGN (i_note.namesz, 4); | |
3519 | filepos = hdr->p_offset + (descdata - buf); | |
3520 | switch (i_note.type) | |
3521 | { | |
3522 | case NT_PRSTATUS: | |
3523 | /* process descdata as prstatus info */ | |
2e03ce18 ILT |
3524 | if (! bfd_prstatus (abfd, descdata, i_note.descsz, filepos)) |
3525 | return false; | |
32090b8e KR |
3526 | sectname = ".prstatus"; |
3527 | break; | |
3528 | case NT_FPREGSET: | |
3529 | /* process descdata as fpregset info */ | |
2e03ce18 ILT |
3530 | if (! bfd_fpregset (abfd, descdata, i_note.descsz, filepos)) |
3531 | return false; | |
32090b8e KR |
3532 | sectname = ".fpregset"; |
3533 | break; | |
3534 | case NT_PRPSINFO: | |
3535 | /* process descdata as prpsinfo */ | |
2e03ce18 ILT |
3536 | if (! bfd_prpsinfo (abfd, descdata, i_note.descsz, filepos)) |
3537 | return false; | |
32090b8e KR |
3538 | sectname = ".prpsinfo"; |
3539 | break; | |
3540 | default: | |
3541 | /* Unknown descriptor, just ignore it. */ | |
3542 | sectname = NULL; | |
3543 | break; | |
3544 | } | |
3545 | if (sectname != NULL) | |
3546 | { | |
3547 | newsect = bfd_make_section (abfd, sectname); | |
2e03ce18 ILT |
3548 | if (newsect == NULL) |
3549 | return false; | |
32090b8e KR |
3550 | newsect->_raw_size = i_note.descsz; |
3551 | newsect->filepos = filepos; | |
3552 | newsect->flags = SEC_ALLOC | SEC_HAS_CONTENTS; | |
3553 | newsect->alignment_power = 2; | |
3554 | } | |
3555 | x_note_p = (Elf_External_Note *) | |
3556 | (descdata + BFD_ALIGN (i_note.descsz, 4)); | |
3557 | } | |
3558 | } | |
3559 | if (buf != NULL) | |
3560 | { | |
3561 | free (buf); | |
3562 | } | |
b9d5cdf0 DM |
3563 | else if (hdr->p_filesz > 0) |
3564 | { | |
d1ad85a6 | 3565 | bfd_set_error (bfd_error_no_memory); |
b9d5cdf0 DM |
3566 | return false; |
3567 | } | |
32090b8e | 3568 | return true; |
244ffee7 | 3569 | |
244ffee7 JK |
3570 | } |
3571 | ||
32090b8e KR |
3572 | /* Core files are simply standard ELF formatted files that partition |
3573 | the file using the execution view of the file (program header table) | |
3574 | rather than the linking view. In fact, there is no section header | |
3575 | table in a core file. | |
3576 | ||
3577 | The process status information (including the contents of the general | |
3578 | register set) and the floating point register set are stored in a | |
3579 | segment of type PT_NOTE. We handcraft a couple of extra bfd sections | |
3580 | that allow standard bfd access to the general registers (.reg) and the | |
3581 | floating point registers (.reg2). | |
3582 | ||
3583 | */ | |
3584 | ||
2f3508ad | 3585 | const bfd_target * |
1c6042ee ILT |
3586 | elf_core_file_p (abfd) |
3587 | bfd *abfd; | |
244ffee7 | 3588 | { |
32090b8e KR |
3589 | Elf_External_Ehdr x_ehdr; /* Elf file header, external form */ |
3590 | Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */ | |
3591 | Elf_External_Phdr x_phdr; /* Program header table entry, external form */ | |
3592 | Elf_Internal_Phdr *i_phdrp; /* Program header table, internal form */ | |
3593 | unsigned int phindex; | |
d6439785 | 3594 | struct elf_backend_data *ebd; |
244ffee7 | 3595 | |
32090b8e KR |
3596 | /* Read in the ELF header in external format. */ |
3597 | ||
3598 | if (bfd_read ((PTR) & x_ehdr, sizeof (x_ehdr), 1, abfd) != sizeof (x_ehdr)) | |
244ffee7 | 3599 | { |
25057836 JL |
3600 | if (bfd_get_error () != bfd_error_system_call) |
3601 | bfd_set_error (bfd_error_wrong_format); | |
244ffee7 JK |
3602 | return NULL; |
3603 | } | |
32090b8e KR |
3604 | |
3605 | /* Now check to see if we have a valid ELF file, and one that BFD can | |
3606 | make use of. The magic number must match, the address size ('class') | |
3607 | and byte-swapping must match our XVEC entry, and it must have a | |
3608 | program header table (FIXME: See comments re segments at top of this | |
3609 | file). */ | |
3610 | ||
3611 | if (elf_file_p (&x_ehdr) == false) | |
244ffee7 | 3612 | { |
32090b8e | 3613 | wrong: |
d1ad85a6 | 3614 | bfd_set_error (bfd_error_wrong_format); |
32090b8e | 3615 | return NULL; |
244ffee7 | 3616 | } |
244ffee7 | 3617 | |
32090b8e | 3618 | /* FIXME, Check EI_VERSION here ! */ |
244ffee7 | 3619 | |
32090b8e KR |
3620 | { |
3621 | #if ARCH_SIZE == 32 | |
3622 | int desired_address_size = ELFCLASS32; | |
3623 | #endif | |
3624 | #if ARCH_SIZE == 64 | |
3625 | int desired_address_size = ELFCLASS64; | |
3626 | #endif | |
3627 | ||
3628 | if (x_ehdr.e_ident[EI_CLASS] != desired_address_size) | |
3629 | goto wrong; | |
3630 | } | |
3631 | ||
3632 | /* Switch xvec to match the specified byte order. */ | |
3633 | switch (x_ehdr.e_ident[EI_DATA]) | |
244ffee7 | 3634 | { |
32090b8e KR |
3635 | case ELFDATA2MSB: /* Big-endian */ |
3636 | if (abfd->xvec->byteorder_big_p == false) | |
3637 | goto wrong; | |
244ffee7 | 3638 | break; |
32090b8e KR |
3639 | case ELFDATA2LSB: /* Little-endian */ |
3640 | if (abfd->xvec->byteorder_big_p == true) | |
3641 | goto wrong; | |
244ffee7 | 3642 | break; |
32090b8e KR |
3643 | case ELFDATANONE: /* No data encoding specified */ |
3644 | default: /* Unknown data encoding specified */ | |
3645 | goto wrong; | |
244ffee7 JK |
3646 | } |
3647 | ||
32090b8e KR |
3648 | /* Allocate an instance of the elf_obj_tdata structure and hook it up to |
3649 | the tdata pointer in the bfd. */ | |
244ffee7 | 3650 | |
32090b8e KR |
3651 | elf_tdata (abfd) = |
3652 | (struct elf_obj_tdata *) bfd_zalloc (abfd, sizeof (struct elf_obj_tdata)); | |
3653 | if (elf_tdata (abfd) == NULL) | |
244ffee7 | 3654 | { |
d1ad85a6 | 3655 | bfd_set_error (bfd_error_no_memory); |
32090b8e | 3656 | return NULL; |
244ffee7 | 3657 | } |
244ffee7 | 3658 | |
32090b8e | 3659 | /* FIXME, `wrong' returns from this point onward, leak memory. */ |
244ffee7 | 3660 | |
32090b8e KR |
3661 | /* Now that we know the byte order, swap in the rest of the header */ |
3662 | i_ehdrp = elf_elfheader (abfd); | |
3663 | elf_swap_ehdr_in (abfd, &x_ehdr, i_ehdrp); | |
3664 | #if DEBUG & 1 | |
3665 | elf_debug_file (i_ehdrp); | |
3666 | #endif | |
244ffee7 | 3667 | |
d6439785 JL |
3668 | ebd = get_elf_backend_data (abfd); |
3669 | ||
3670 | /* Check that the ELF e_machine field matches what this particular | |
3671 | BFD format expects. */ | |
3672 | if (ebd->elf_machine_code != i_ehdrp->e_machine) | |
3673 | { | |
2f3508ad | 3674 | const bfd_target * const *target_ptr; |
d6439785 JL |
3675 | |
3676 | if (ebd->elf_machine_code != EM_NONE) | |
3677 | goto wrong; | |
3678 | ||
3679 | /* This is the generic ELF target. Let it match any ELF target | |
3680 | for which we do not have a specific backend. */ | |
3681 | for (target_ptr = bfd_target_vector; *target_ptr != NULL; target_ptr++) | |
3682 | { | |
3683 | struct elf_backend_data *back; | |
3684 | ||
3685 | if ((*target_ptr)->flavour != bfd_target_elf_flavour) | |
3686 | continue; | |
3687 | back = (struct elf_backend_data *) (*target_ptr)->backend_data; | |
3688 | if (back->elf_machine_code == i_ehdrp->e_machine) | |
3689 | { | |
3690 | /* target_ptr is an ELF backend which matches this | |
3691 | object file, so reject the generic ELF target. */ | |
3692 | goto wrong; | |
3693 | } | |
3694 | } | |
3695 | } | |
3696 | ||
32090b8e KR |
3697 | /* If there is no program header, or the type is not a core file, then |
3698 | we are hosed. */ | |
3699 | if (i_ehdrp->e_phoff == 0 || i_ehdrp->e_type != ET_CORE) | |
3700 | goto wrong; | |
244ffee7 | 3701 | |
32090b8e KR |
3702 | /* Allocate space for a copy of the program header table in |
3703 | internal form, seek to the program header table in the file, | |
3704 | read it in, and convert it to internal form. As a simple sanity | |
3705 | check, verify that the what BFD thinks is the size of each program | |
3706 | header table entry actually matches the size recorded in the file. */ | |
3707 | ||
3708 | if (i_ehdrp->e_phentsize != sizeof (x_phdr)) | |
3709 | goto wrong; | |
3710 | i_phdrp = (Elf_Internal_Phdr *) | |
3711 | bfd_alloc (abfd, sizeof (*i_phdrp) * i_ehdrp->e_phnum); | |
3712 | if (!i_phdrp) | |
244ffee7 | 3713 | { |
d1ad85a6 | 3714 | bfd_set_error (bfd_error_no_memory); |
32090b8e KR |
3715 | return NULL; |
3716 | } | |
3717 | if (bfd_seek (abfd, i_ehdrp->e_phoff, SEEK_SET) == -1) | |
25057836 | 3718 | return NULL; |
32090b8e KR |
3719 | for (phindex = 0; phindex < i_ehdrp->e_phnum; phindex++) |
3720 | { | |
3721 | if (bfd_read ((PTR) & x_phdr, sizeof (x_phdr), 1, abfd) | |
3722 | != sizeof (x_phdr)) | |
25057836 | 3723 | return NULL; |
32090b8e | 3724 | elf_swap_phdr_in (abfd, &x_phdr, i_phdrp + phindex); |
244ffee7 JK |
3725 | } |
3726 | ||
32090b8e KR |
3727 | /* Once all of the program headers have been read and converted, we |
3728 | can start processing them. */ | |
244ffee7 | 3729 | |
32090b8e KR |
3730 | for (phindex = 0; phindex < i_ehdrp->e_phnum; phindex++) |
3731 | { | |
3732 | bfd_section_from_phdr (abfd, i_phdrp + phindex, phindex); | |
3733 | if ((i_phdrp + phindex)->p_type == PT_NOTE) | |
3734 | { | |
2e03ce18 ILT |
3735 | if (! elf_corefile_note (abfd, i_phdrp + phindex)) |
3736 | return NULL; | |
32090b8e KR |
3737 | } |
3738 | } | |
244ffee7 | 3739 | |
32090b8e | 3740 | /* Remember the entry point specified in the ELF file header. */ |
244ffee7 | 3741 | |
32090b8e | 3742 | bfd_get_start_address (abfd) = i_ehdrp->e_entry; |
244ffee7 | 3743 | |
32090b8e | 3744 | return abfd->xvec; |
244ffee7 | 3745 | } |
6ec3bb6a ILT |
3746 | \f |
3747 | /* ELF linker code. */ | |
3748 | ||
3749 | static boolean elf_link_add_object_symbols | |
3750 | PARAMS ((bfd *, struct bfd_link_info *)); | |
3751 | static boolean elf_link_add_archive_symbols | |
3752 | PARAMS ((bfd *, struct bfd_link_info *)); | |
013dec1a ILT |
3753 | static INLINE boolean elf_link_record_dynamic_symbol |
3754 | PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *)); | |
3755 | static boolean elf_link_create_dynamic_sections | |
3756 | PARAMS ((bfd *, struct bfd_link_info *)); | |
3757 | static boolean elf_adjust_dynamic_symbol | |
3758 | PARAMS ((struct elf_link_hash_entry *, PTR)); | |
6ec3bb6a ILT |
3759 | |
3760 | /* Given an ELF BFD, add symbols to the global hash table as | |
3761 | appropriate. */ | |
3762 | ||
3763 | boolean | |
3764 | elf_bfd_link_add_symbols (abfd, info) | |
3765 | bfd *abfd; | |
3766 | struct bfd_link_info *info; | |
3767 | { | |
3768 | switch (bfd_get_format (abfd)) | |
3769 | { | |
3770 | case bfd_object: | |
3771 | return elf_link_add_object_symbols (abfd, info); | |
3772 | case bfd_archive: | |
3773 | return elf_link_add_archive_symbols (abfd, info); | |
3774 | default: | |
3775 | bfd_set_error (bfd_error_wrong_format); | |
3776 | return false; | |
3777 | } | |
3778 | } | |
3779 | ||
3780 | /* Add symbols from an ELF archive file to the linker hash table. We | |
3781 | don't use _bfd_generic_link_add_archive_symbols because of a | |
3782 | problem which arises on UnixWare. The UnixWare libc.so is an | |
3783 | archive which includes an entry libc.so.1 which defines a bunch of | |
3784 | symbols. The libc.so archive also includes a number of other | |
3785 | object files, which also define symbols, some of which are the same | |
3786 | as those defined in libc.so.1. Correct linking requires that we | |
3787 | consider each object file in turn, and include it if it defines any | |
3788 | symbols we need. _bfd_generic_link_add_archive_symbols does not do | |
3789 | this; it looks through the list of undefined symbols, and includes | |
3790 | any object file which defines them. When this algorithm is used on | |
3791 | UnixWare, it winds up pulling in libc.so.1 early and defining a | |
3792 | bunch of symbols. This means that some of the other objects in the | |
3793 | archive are not included in the link, which is incorrect since they | |
3794 | precede libc.so.1 in the archive. | |
3795 | ||
3796 | Fortunately, ELF archive handling is simpler than that done by | |
3797 | _bfd_generic_link_add_archive_symbols, which has to allow for a.out | |
3798 | oddities. In ELF, if we find a symbol in the archive map, and the | |
3799 | symbol is currently undefined, we know that we must pull in that | |
3800 | object file. | |
3801 | ||
3802 | Unfortunately, we do have to make multiple passes over the symbol | |
3803 | table until nothing further is resolved. */ | |
3804 | ||
3805 | static boolean | |
3806 | elf_link_add_archive_symbols (abfd, info) | |
3807 | bfd *abfd; | |
3808 | struct bfd_link_info *info; | |
3809 | { | |
3810 | symindex c; | |
3811 | boolean *defined = NULL; | |
3812 | boolean *included = NULL; | |
3813 | carsym *symdefs; | |
3814 | boolean loop; | |
3815 | ||
3816 | if (! bfd_has_map (abfd)) | |
3817 | { | |
3818 | bfd_set_error (bfd_error_no_symbols); | |
3819 | return false; | |
3820 | } | |
3821 | ||
3822 | /* Keep track of all symbols we know to be already defined, and all | |
3823 | files we know to be already included. This is to speed up the | |
3824 | second and subsequent passes. */ | |
3825 | c = bfd_ardata (abfd)->symdef_count; | |
3826 | if (c == 0) | |
3827 | return true; | |
3828 | defined = (boolean *) malloc (c * sizeof (boolean)); | |
3829 | included = (boolean *) malloc (c * sizeof (boolean)); | |
3830 | if (defined == (boolean *) NULL || included == (boolean *) NULL) | |
3831 | { | |
3832 | bfd_set_error (bfd_error_no_memory); | |
3833 | goto error_return; | |
3834 | } | |
3835 | memset (defined, 0, c * sizeof (boolean)); | |
3836 | memset (included, 0, c * sizeof (boolean)); | |
3837 | ||
3838 | symdefs = bfd_ardata (abfd)->symdefs; | |
3839 | ||
3840 | do | |
3841 | { | |
3842 | file_ptr last; | |
3843 | symindex i; | |
3844 | carsym *symdef; | |
3845 | carsym *symdefend; | |
3846 | ||
3847 | loop = false; | |
3848 | last = -1; | |
3849 | ||
3850 | symdef = symdefs; | |
3851 | symdefend = symdef + c; | |
3852 | for (i = 0; symdef < symdefend; symdef++, i++) | |
3853 | { | |
3854 | struct elf_link_hash_entry *h; | |
3855 | bfd *element; | |
3856 | struct bfd_link_hash_entry *undefs_tail; | |
3857 | symindex mark; | |
3858 | ||
3859 | if (defined[i] || included[i]) | |
3860 | continue; | |
3861 | if (symdef->file_offset == last) | |
3862 | { | |
3863 | included[i] = true; | |
3864 | continue; | |
3865 | } | |
3866 | ||
3867 | h = elf_link_hash_lookup (elf_hash_table (info), symdef->name, | |
3868 | false, false, false); | |
3869 | if (h == (struct elf_link_hash_entry *) NULL) | |
3870 | continue; | |
3871 | if (h->root.type != bfd_link_hash_undefined) | |
3872 | { | |
3873 | defined[i] = true; | |
3874 | continue; | |
3875 | } | |
3876 | ||
3877 | /* We need to include this archive member. */ | |
3878 | ||
3879 | element = _bfd_get_elt_at_filepos (abfd, symdef->file_offset); | |
3880 | if (element == (bfd *) NULL) | |
3881 | goto error_return; | |
3882 | ||
3883 | if (! bfd_check_format (element, bfd_object)) | |
3884 | goto error_return; | |
3885 | ||
3886 | /* Doublecheck that we have not included this object | |
3887 | already--it should be impossible, but there may be | |
3888 | something wrong with the archive. */ | |
3889 | if (element->archive_pass != 0) | |
3890 | { | |
3891 | bfd_set_error (bfd_error_bad_value); | |
3892 | goto error_return; | |
3893 | } | |
3894 | element->archive_pass = 1; | |
3895 | ||
3896 | undefs_tail = info->hash->undefs_tail; | |
3897 | ||
3898 | if (! (*info->callbacks->add_archive_element) (info, element, | |
3899 | symdef->name)) | |
3900 | goto error_return; | |
3901 | if (! elf_link_add_object_symbols (element, info)) | |
3902 | goto error_return; | |
3903 | ||
3904 | /* If there are any new undefined symbols, we need to make | |
3905 | another pass through the archive in order to see whether | |
3906 | they can be defined. FIXME: This isn't perfect, because | |
3907 | common symbols wind up on undefs_tail and because an | |
3908 | undefined symbol which is defined later on in this pass | |
3909 | does not require another pass. This isn't a bug, but it | |
3910 | does make the code less efficient than it could be. */ | |
3911 | if (undefs_tail != info->hash->undefs_tail) | |
3912 | loop = true; | |
3913 | ||
3914 | /* Look backward to mark all symbols from this object file | |
3915 | which we have already seen in this pass. */ | |
3916 | mark = i; | |
3917 | do | |
3918 | { | |
3919 | included[mark] = true; | |
3920 | if (mark == 0) | |
3921 | break; | |
3922 | --mark; | |
3923 | } | |
3924 | while (symdefs[mark].file_offset == symdef->file_offset); | |
3925 | ||
3926 | /* We mark subsequent symbols from this object file as we go | |
3927 | on through the loop. */ | |
3928 | last = symdef->file_offset; | |
3929 | } | |
3930 | } | |
3931 | while (loop); | |
3932 | ||
3933 | free (defined); | |
3934 | free (included); | |
3935 | ||
3936 | return true; | |
3937 | ||
3938 | error_return: | |
3939 | if (defined != (boolean *) NULL) | |
3940 | free (defined); | |
3941 | if (included != (boolean *) NULL) | |
3942 | free (included); | |
3943 | return false; | |
3944 | } | |
3945 | ||
013dec1a ILT |
3946 | /* Record a new dynamic symbol. We record the dynamic symbols as we |
3947 | read the input files, since we need to have a list of all of them | |
3948 | before we can determine the final sizes of the output sections. */ | |
3949 | ||
3950 | static INLINE boolean | |
3951 | elf_link_record_dynamic_symbol (info, h) | |
3952 | struct bfd_link_info *info; | |
3953 | struct elf_link_hash_entry *h; | |
3954 | { | |
3955 | if (h->dynindx == -1) | |
3956 | { | |
3957 | h->dynindx = elf_hash_table (info)->dynsymcount; | |
3958 | ++elf_hash_table (info)->dynsymcount; | |
3959 | h->dynstr_index = bfd_add_to_strtab (elf_hash_table (info)->dynobj, | |
3960 | elf_hash_table (info)->dynstr, | |
3961 | h->root.root.string); | |
3962 | if (h->dynstr_index == (unsigned long) -1) | |
3963 | return false; | |
3964 | } | |
3965 | ||
3966 | return true; | |
3967 | } | |
3968 | ||
6ec3bb6a ILT |
3969 | /* Add symbols from an ELF object file to the linker hash table. */ |
3970 | ||
3971 | static boolean | |
3972 | elf_link_add_object_symbols (abfd, info) | |
3973 | bfd *abfd; | |
3974 | struct bfd_link_info *info; | |
3975 | { | |
3976 | boolean (*add_symbol_hook) PARAMS ((bfd *, struct bfd_link_info *, | |
3977 | const Elf_Internal_Sym *, | |
3978 | const char **, flagword *, | |
3979 | asection **, bfd_vma *)); | |
3980 | boolean collect; | |
3981 | Elf_Internal_Shdr *hdr; | |
3982 | size_t symcount; | |
3983 | size_t extsymcount; | |
5315c428 | 3984 | size_t extsymoff; |
6ec3bb6a ILT |
3985 | Elf_External_Sym *buf = NULL; |
3986 | struct elf_link_hash_entry **sym_hash; | |
013dec1a ILT |
3987 | boolean dynamic; |
3988 | Elf_External_Dyn *dynbuf = NULL; | |
3989 | struct elf_link_hash_entry *weaks; | |
6ec3bb6a ILT |
3990 | Elf_External_Sym *esym; |
3991 | Elf_External_Sym *esymend; | |
3992 | ||
3993 | add_symbol_hook = get_elf_backend_data (abfd)->elf_add_symbol_hook; | |
3994 | collect = get_elf_backend_data (abfd)->collect; | |
3995 | ||
3996 | hdr = &elf_tdata (abfd)->symtab_hdr; | |
3997 | symcount = hdr->sh_size / sizeof (Elf_External_Sym); | |
3998 | ||
3999 | /* The sh_info field of the symtab header tells us where the | |
4000 | external symbols start. We don't care about the local symbols at | |
4001 | this point. */ | |
5315c428 ILT |
4002 | if (elf_bad_symtab (abfd)) |
4003 | { | |
4004 | extsymcount = symcount; | |
4005 | extsymoff = 0; | |
4006 | } | |
4007 | else | |
4008 | { | |
4009 | extsymcount = symcount - hdr->sh_info; | |
4010 | extsymoff = hdr->sh_info; | |
4011 | } | |
6ec3bb6a ILT |
4012 | |
4013 | buf = (Elf_External_Sym *) malloc (extsymcount * sizeof (Elf_External_Sym)); | |
4014 | if (buf == NULL && extsymcount != 0) | |
4015 | { | |
4016 | bfd_set_error (bfd_error_no_memory); | |
4017 | goto error_return; | |
4018 | } | |
4019 | ||
013dec1a ILT |
4020 | /* We store a pointer to the hash table entry for each external |
4021 | symbol. */ | |
6ec3bb6a ILT |
4022 | sym_hash = ((struct elf_link_hash_entry **) |
4023 | bfd_alloc (abfd, | |
4024 | extsymcount * sizeof (struct elf_link_hash_entry *))); | |
4025 | if (sym_hash == NULL) | |
4026 | { | |
4027 | bfd_set_error (bfd_error_no_memory); | |
4028 | goto error_return; | |
4029 | } | |
4030 | elf_sym_hashes (abfd) = sym_hash; | |
4031 | ||
013dec1a | 4032 | if (elf_elfheader (abfd)->e_type != ET_DYN) |
8af74670 ILT |
4033 | { |
4034 | dynamic = false; | |
4035 | ||
4036 | /* If we are creating a shared library, create all the dynamic | |
4037 | sections immediately. We need to attach them to something, | |
4038 | so we attach them to this BFD, provided it is the right | |
4039 | format. FIXME: If there are no input BFD's of the same | |
4040 | format as the output, we can't make a shared library. */ | |
4041 | if (info->shared | |
4042 | && elf_hash_table (info)->dynobj == NULL | |
4043 | && abfd->xvec == info->hash->creator) | |
4044 | { | |
4045 | if (! elf_link_create_dynamic_sections (abfd, info)) | |
4046 | goto error_return; | |
4047 | elf_hash_table (info)->dynobj = abfd; | |
4048 | } | |
4049 | } | |
013dec1a ILT |
4050 | else |
4051 | { | |
4052 | asection *s; | |
4053 | const char *name; | |
4054 | unsigned long strindex; | |
4055 | ||
4056 | dynamic = true; | |
4057 | ||
4058 | /* You can't use -r against a dynamic object. There's no hope | |
4059 | of using a dynamic object which does not exactly match the | |
4060 | format of the output file. */ | |
4061 | if (info->relocateable | |
4062 | || info->hash->creator != abfd->xvec) | |
4063 | { | |
4064 | bfd_set_error (bfd_error_invalid_operation); | |
4065 | goto error_return; | |
4066 | } | |
4067 | ||
4068 | /* Find the name to use in a DT_NEEDED entry that refers to this | |
4069 | object. If the object has a DT_SONAME entry, we use it. | |
c1f84521 ILT |
4070 | Otherwise, if the generic linker stuck something in |
4071 | elf_dt_needed_name, we use that. Otherwise, we just use the | |
4072 | file name. */ | |
013dec1a | 4073 | name = bfd_get_filename (abfd); |
c1f84521 ILT |
4074 | if (elf_dt_needed_name (abfd) != NULL) |
4075 | name = elf_dt_needed_name (abfd); | |
013dec1a ILT |
4076 | s = bfd_get_section_by_name (abfd, ".dynamic"); |
4077 | if (s != NULL) | |
4078 | { | |
4079 | Elf_External_Dyn *extdyn; | |
4080 | Elf_External_Dyn *extdynend; | |
4081 | ||
4082 | dynbuf = (Elf_External_Dyn *) malloc (s->_raw_size); | |
4083 | if (dynbuf == NULL) | |
4084 | { | |
4085 | bfd_set_error (bfd_error_no_memory); | |
4086 | goto error_return; | |
4087 | } | |
4088 | ||
4089 | if (! bfd_get_section_contents (abfd, s, (PTR) dynbuf, | |
4090 | (file_ptr) 0, s->_raw_size)) | |
4091 | goto error_return; | |
4092 | ||
4093 | extdyn = dynbuf; | |
4094 | extdynend = extdyn + s->_raw_size / sizeof (Elf_External_Dyn); | |
4095 | for (; extdyn < extdynend; extdyn++) | |
4096 | { | |
4097 | Elf_Internal_Dyn dyn; | |
4098 | ||
4099 | elf_swap_dyn_in (abfd, extdyn, &dyn); | |
4100 | if (dyn.d_tag == DT_SONAME) | |
4101 | { | |
4102 | int elfsec; | |
4103 | unsigned long link; | |
4104 | ||
4105 | elfsec = elf_section_from_bfd_section (abfd, s); | |
4106 | if (elfsec == -1) | |
4107 | goto error_return; | |
4108 | link = elf_elfsections (abfd)[elfsec]->sh_link; | |
4109 | name = elf_string_from_elf_section (abfd, link, | |
4110 | dyn.d_un.d_val); | |
4111 | if (name == NULL) | |
4112 | goto error_return; | |
4113 | ||
4114 | break; | |
4115 | } | |
4116 | } | |
4117 | ||
4118 | free (dynbuf); | |
4119 | dynbuf = NULL; | |
4120 | } | |
4121 | ||
4122 | /* We do not want to include any of the sections in a dynamic | |
4123 | object in the output file. We hack by simply clobbering the | |
4124 | list of sections in the BFD. This could be handled more | |
4125 | cleanly by, say, a new section flag; the existing | |
4126 | SEC_NEVER_LOAD flag is not the one we want, because that one | |
4127 | still implies that the section takes up space in the output | |
4128 | file. */ | |
4129 | abfd->sections = NULL; | |
4130 | ||
4131 | /* If this is the first dynamic object found in the link, create | |
4132 | the special sections required for dynamic linking. We need | |
4133 | to put them somewhere, and attaching them to the first | |
4134 | dynamic object is as good place as any. */ | |
4135 | if (elf_hash_table (info)->dynobj == NULL) | |
4136 | { | |
4137 | if (! elf_link_create_dynamic_sections (abfd, info)) | |
4138 | goto error_return; | |
4139 | elf_hash_table (info)->dynobj = abfd; | |
4140 | } | |
4141 | ||
4142 | /* Add a DT_NEEDED entry for this dynamic object. */ | |
4143 | strindex = bfd_add_to_strtab (abfd, | |
4144 | elf_hash_table (info)->dynstr, | |
4145 | name); | |
4146 | ||
4147 | if (strindex == (unsigned long) -1) | |
4148 | goto error_return; | |
4149 | if (! elf_add_dynamic_entry (info, DT_NEEDED, strindex)) | |
4150 | goto error_return; | |
4151 | } | |
4152 | ||
6ec3bb6a | 4153 | if (bfd_seek (abfd, |
5315c428 | 4154 | hdr->sh_offset + extsymoff * sizeof (Elf_External_Sym), |
6ec3bb6a ILT |
4155 | SEEK_SET) != 0 |
4156 | || (bfd_read ((PTR) buf, sizeof (Elf_External_Sym), extsymcount, abfd) | |
4157 | != extsymcount * sizeof (Elf_External_Sym))) | |
4158 | goto error_return; | |
4159 | ||
013dec1a ILT |
4160 | weaks = NULL; |
4161 | ||
6ec3bb6a ILT |
4162 | esymend = buf + extsymcount; |
4163 | for (esym = buf; esym < esymend; esym++, sym_hash++) | |
4164 | { | |
4165 | Elf_Internal_Sym sym; | |
4166 | int bind; | |
4167 | bfd_vma value; | |
4168 | asection *sec; | |
4169 | flagword flags; | |
4170 | const char *name; | |
013dec1a ILT |
4171 | struct elf_link_hash_entry *h = NULL; |
4172 | boolean definition; | |
6ec3bb6a ILT |
4173 | |
4174 | elf_swap_symbol_in (abfd, esym, &sym); | |
4175 | ||
4176 | flags = BSF_NO_FLAGS; | |
4177 | sec = NULL; | |
4178 | value = sym.st_value; | |
4179 | *sym_hash = NULL; | |
4180 | ||
4181 | bind = ELF_ST_BIND (sym.st_info); | |
4182 | if (bind == STB_LOCAL) | |
4183 | { | |
4184 | /* This should be impossible, since ELF requires that all | |
4185 | global symbols follow all local symbols, and that sh_info | |
5315c428 ILT |
4186 | point to the first global symbol. Unfortunatealy, Irix 5 |
4187 | screws this up. */ | |
4188 | continue; | |
6ec3bb6a ILT |
4189 | } |
4190 | else if (bind == STB_GLOBAL) | |
4191 | flags = BSF_GLOBAL; | |
4192 | else if (bind == STB_WEAK) | |
4193 | flags = BSF_WEAK; | |
4194 | else | |
4195 | { | |
4196 | /* Leave it up to the processor backend. */ | |
4197 | } | |
4198 | ||
4199 | if (sym.st_shndx == SHN_UNDEF) | |
badd23e3 | 4200 | sec = bfd_und_section_ptr; |
6ec3bb6a ILT |
4201 | else if (sym.st_shndx > 0 && sym.st_shndx < SHN_LORESERVE) |
4202 | { | |
4203 | sec = section_from_elf_index (abfd, sym.st_shndx); | |
4204 | if (sec == NULL) | |
4205 | goto error_return; | |
4206 | value -= sec->vma; | |
4207 | } | |
4208 | else if (sym.st_shndx == SHN_ABS) | |
badd23e3 | 4209 | sec = bfd_abs_section_ptr; |
6ec3bb6a ILT |
4210 | else if (sym.st_shndx == SHN_COMMON) |
4211 | { | |
badd23e3 | 4212 | sec = bfd_com_section_ptr; |
6ec3bb6a ILT |
4213 | /* What ELF calls the size we call the value. What ELF |
4214 | calls the value we call the alignment. */ | |
4215 | value = sym.st_size; | |
4216 | } | |
4217 | else | |
4218 | { | |
4219 | /* Leave it up to the processor backend. */ | |
4220 | } | |
4221 | ||
4222 | name = elf_string_from_elf_section (abfd, hdr->sh_link, sym.st_name); | |
4223 | if (name == (const char *) NULL) | |
4224 | goto error_return; | |
4225 | ||
4226 | if (add_symbol_hook) | |
4227 | { | |
4228 | if (! (*add_symbol_hook) (abfd, info, &sym, &name, &flags, &sec, | |
4229 | &value)) | |
4230 | goto error_return; | |
4231 | ||
4232 | /* The hook function sets the name to NULL if this symbol | |
4233 | should be skipped for some reason. */ | |
4234 | if (name == (const char *) NULL) | |
4235 | continue; | |
4236 | } | |
4237 | ||
4238 | /* Sanity check that all possibilities were handled. */ | |
4239 | if (flags == BSF_NO_FLAGS || sec == (asection *) NULL) | |
4240 | { | |
4241 | bfd_set_error (bfd_error_bad_value); | |
4242 | goto error_return; | |
4243 | } | |
4244 | ||
badd23e3 | 4245 | if (bfd_is_und_section (sec) |
013dec1a ILT |
4246 | || bfd_is_com_section (sec)) |
4247 | definition = false; | |
4248 | else | |
4249 | definition = true; | |
4250 | ||
4251 | if (info->hash->creator->flavour == bfd_target_elf_flavour) | |
4252 | { | |
4253 | /* We need to look up the symbol now in order to get some of | |
4254 | the dynamic object handling right. We pass the hash | |
4255 | table entry in to _bfd_generic_link_add_one_symbol so | |
4256 | that it does not have to look it up again. */ | |
4257 | h = elf_link_hash_lookup (elf_hash_table (info), name, | |
4258 | true, false, false); | |
4259 | if (h == NULL) | |
4260 | goto error_return; | |
4261 | *sym_hash = h; | |
4262 | ||
4263 | /* If we are looking at a dynamic object, and this is a | |
4264 | definition, we need to see if it has already been defined | |
4265 | by some other object. If it has, we want to use the | |
4266 | existing definition, and we do not want to report a | |
4267 | multiple symbol definition error; we do this by | |
badd23e3 | 4268 | clobbering sec to be bfd_und_section_ptr. */ |
013dec1a ILT |
4269 | if (dynamic && definition) |
4270 | { | |
4271 | if (h->root.type == bfd_link_hash_defined) | |
badd23e3 | 4272 | sec = bfd_und_section_ptr; |
013dec1a ILT |
4273 | } |
4274 | ||
4275 | /* Similarly, if we are not looking at a dynamic object, and | |
4276 | we have a definition, we want to override any definition | |
4277 | we may have from a dynamic object. Symbols from regular | |
4278 | files always take precedence over symbols from dynamic | |
4279 | objects, even if they are defined after the dynamic | |
4280 | object in the link. */ | |
4281 | if (! dynamic | |
4282 | && definition | |
4283 | && h->root.type == bfd_link_hash_defined | |
4284 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
4285 | && (bfd_get_flavour (h->root.u.def.section->owner) | |
4286 | == bfd_target_elf_flavour) | |
4287 | && (elf_elfheader (h->root.u.def.section->owner)->e_type | |
4288 | == ET_DYN)) | |
4289 | { | |
4290 | /* Change the hash table entry to undefined, and let | |
4291 | _bfd_generic_link_add_one_symbol do the right thing | |
4292 | with the new definition. */ | |
4293 | h->root.type = bfd_link_hash_undefined; | |
4294 | h->root.u.undef.abfd = h->root.u.def.section->owner; | |
bf73e4f3 | 4295 | h->elf_link_hash_flags &=~ ELF_LINK_HASH_DEFINED_WEAK; |
013dec1a | 4296 | } |
bf73e4f3 ILT |
4297 | |
4298 | /* If this is a weak definition which we are going to use, | |
4299 | and the symbol is currently undefined, record that the | |
4300 | definition is weak. */ | |
4301 | if (definition | |
4302 | && (flags & BSF_WEAK) != 0 | |
4303 | && ! bfd_is_und_section (sec) | |
4304 | && (h->root.type == bfd_link_hash_new | |
4305 | || h->root.type == bfd_link_hash_undefined | |
4306 | || h->root.type == bfd_link_hash_weak)) | |
4307 | h->elf_link_hash_flags |= ELF_LINK_HASH_DEFINED_WEAK; | |
013dec1a ILT |
4308 | } |
4309 | ||
4310 | if (! (_bfd_generic_link_add_one_symbol | |
4311 | (info, abfd, name, flags, sec, value, (const char *) NULL, | |
4312 | false, collect, (struct bfd_link_hash_entry **) sym_hash))) | |
6ec3bb6a ILT |
4313 | goto error_return; |
4314 | ||
013dec1a ILT |
4315 | if (dynamic |
4316 | && definition | |
4317 | && (flags & BSF_WEAK) != 0 | |
4318 | && ELF_ST_TYPE (sym.st_info) != STT_FUNC | |
4319 | && (*sym_hash)->weakdef == NULL) | |
4320 | { | |
4321 | /* Keep a list of all weak defined non function symbols from | |
4322 | a dynamic object, using the weakdef field. Later in this | |
4323 | function we will set the weakdef field to the correct | |
4324 | value. We only put non-function symbols from dynamic | |
4325 | objects on this list, because that happens to be the only | |
4326 | time we need to know the normal symbol corresponding to a | |
4327 | weak symbol, and the information is time consuming to | |
4328 | figure out. If the weakdef field is not already NULL, | |
4329 | then this symbol was already defined by some previous | |
4330 | dynamic object, and we will be using that previous | |
4331 | definition anyhow. */ | |
4332 | ||
4333 | (*sym_hash)->weakdef = weaks; | |
4334 | weaks = *sym_hash; | |
4335 | } | |
4336 | ||
7c6da9ca ILT |
4337 | if (sym.st_shndx == SHN_COMMON |
4338 | && h->root.type == bfd_link_hash_common) | |
4339 | h->root.u.c.alignment_power = bfd_log2 (sym.st_value); | |
4340 | ||
6ec3bb6a ILT |
4341 | if (info->hash->creator->flavour == bfd_target_elf_flavour) |
4342 | { | |
013dec1a ILT |
4343 | int old_flags; |
4344 | boolean dynsym; | |
4345 | int new_flag; | |
4346 | ||
6ec3bb6a ILT |
4347 | /* Remember the symbol size, type and alignment. */ |
4348 | if (sym.st_size != 0) | |
4349 | { | |
4350 | /* FIXME: We should probably somehow give a warning if | |
4351 | the symbol size changes. */ | |
013dec1a | 4352 | h->size = sym.st_size; |
6ec3bb6a | 4353 | } |
6ec3bb6a ILT |
4354 | if (ELF_ST_TYPE (sym.st_info) != STT_NOTYPE) |
4355 | { | |
4356 | /* FIXME: We should probably somehow give a warning if | |
4357 | the symbol type changes. */ | |
013dec1a ILT |
4358 | h->type = ELF_ST_TYPE (sym.st_info); |
4359 | } | |
4360 | ||
4361 | /* Set a flag in the hash table entry indicating the type of | |
4362 | reference or definition we just found. Keep a count of | |
4363 | the number of dynamic symbols we find. A dynamic symbol | |
4364 | is one which is referenced or defined by both a regular | |
4365 | object and a shared object, or one which is referenced or | |
4366 | defined by more than one shared object. */ | |
4367 | old_flags = h->elf_link_hash_flags; | |
4368 | dynsym = false; | |
4369 | if (! dynamic) | |
4370 | { | |
4371 | if (! definition) | |
4372 | new_flag = ELF_LINK_HASH_REF_REGULAR; | |
4373 | else | |
4374 | new_flag = ELF_LINK_HASH_DEF_REGULAR; | |
4375 | if ((old_flags & (ELF_LINK_HASH_DEF_DYNAMIC | |
4376 | | ELF_LINK_HASH_REF_DYNAMIC)) != 0) | |
4377 | dynsym = true; | |
4378 | } | |
4379 | else | |
4380 | { | |
4381 | if (! definition) | |
4382 | new_flag = ELF_LINK_HASH_REF_DYNAMIC; | |
4383 | else | |
4384 | new_flag = ELF_LINK_HASH_DEF_DYNAMIC; | |
4385 | if ((old_flags & new_flag) != 0) | |
4386 | { | |
4387 | if (! definition) | |
4388 | new_flag = ELF_LINK_HASH_REF_DYNAMIC_MULTIPLE; | |
4389 | else | |
4390 | new_flag = ELF_LINK_HASH_DEF_DYNAMIC_MULTIPLE; | |
4391 | dynsym = true; | |
4392 | } | |
4393 | else | |
4394 | { | |
4395 | if ((old_flags & (ELF_LINK_HASH_DEF_REGULAR | |
4396 | | ELF_LINK_HASH_REF_REGULAR)) != 0) | |
4397 | dynsym = true; | |
4398 | } | |
4399 | } | |
4400 | ||
4401 | h->elf_link_hash_flags |= new_flag; | |
4402 | if (dynsym && h->dynindx == -1) | |
4403 | { | |
4404 | if (! elf_link_record_dynamic_symbol (info, h)) | |
4405 | goto error_return; | |
4406 | } | |
4407 | } | |
4408 | } | |
4409 | ||
4410 | /* Now set the weakdefs field correctly for all the weak defined | |
4411 | symbols we found. The only way to do this is to search all the | |
4412 | symbols. Since we only need the information for non functions in | |
4413 | dynamic objects, that's the only time we actually put anything on | |
4414 | the list WEAKS. We need this information so that if a regular | |
4415 | object refers to a symbol defined weakly in a dynamic object, the | |
4416 | real symbol in the dynamic object is also put in the dynamic | |
4417 | symbols; we also must arrange for both symbols to point to the | |
4418 | same memory location. We could handle the general case of symbol | |
4419 | aliasing, but a general symbol alias can only be generated in | |
4420 | assembler code, handling it correctly would be very time | |
4421 | consuming, and other ELF linkers don't handle general aliasing | |
4422 | either. */ | |
4423 | while (weaks != NULL) | |
4424 | { | |
4425 | struct elf_link_hash_entry *hlook; | |
4426 | asection *slook; | |
4427 | bfd_vma vlook; | |
4428 | struct elf_link_hash_entry **hpp; | |
4429 | struct elf_link_hash_entry **hppend; | |
4430 | ||
4431 | hlook = weaks; | |
4432 | weaks = hlook->weakdef; | |
4433 | hlook->weakdef = NULL; | |
4434 | ||
4435 | BFD_ASSERT (hlook->root.type == bfd_link_hash_defined); | |
4436 | slook = hlook->root.u.def.section; | |
4437 | vlook = hlook->root.u.def.value; | |
4438 | ||
4439 | hpp = elf_sym_hashes (abfd); | |
4440 | hppend = hpp + extsymcount; | |
4441 | for (; hpp < hppend; hpp++) | |
4442 | { | |
4443 | struct elf_link_hash_entry *h; | |
4444 | ||
4445 | h = *hpp; | |
4446 | if (h != hlook | |
4447 | && h->root.type == bfd_link_hash_defined | |
4448 | && h->root.u.def.section == slook | |
4449 | && h->root.u.def.value == vlook) | |
4450 | { | |
4451 | hlook->weakdef = h; | |
4452 | ||
4453 | /* If the weak definition is in the list of dynamic | |
4454 | symbols, make sure the real definition is put there | |
4455 | as well. */ | |
4456 | if (hlook->dynindx != -1 | |
4457 | && h->dynindx == -1) | |
4458 | { | |
4459 | if (! elf_link_record_dynamic_symbol (info, h)) | |
4460 | goto error_return; | |
4461 | } | |
4462 | ||
4463 | break; | |
6ec3bb6a ILT |
4464 | } |
4465 | } | |
4466 | } | |
4467 | ||
4468 | if (buf != NULL) | |
4469 | free (buf); | |
4470 | ||
4471 | return true; | |
4472 | ||
4473 | error_return: | |
4474 | if (buf != NULL) | |
4475 | free (buf); | |
013dec1a ILT |
4476 | if (dynbuf != NULL) |
4477 | free (dynbuf); | |
6ec3bb6a ILT |
4478 | return false; |
4479 | } | |
013dec1a ILT |
4480 | |
4481 | /* Create some sections which will be filled in with dynamic linking | |
4482 | information. The ABFD argument is an input file which is a dynamic | |
4483 | object. The dynamic sections take up virtual memory space when the | |
4484 | final executable is run, so we need to create them before addresses | |
4485 | are assigned to the output sections. We work out the actual | |
4486 | contents and size of these sections later. */ | |
4487 | ||
4488 | static boolean | |
4489 | elf_link_create_dynamic_sections (abfd, info) | |
4490 | bfd *abfd; | |
4491 | struct bfd_link_info *info; | |
4492 | { | |
4493 | flagword flags; | |
4494 | register asection *s; | |
4495 | struct elf_link_hash_entry *h; | |
4496 | struct elf_backend_data *bed; | |
4497 | ||
4498 | /* Note that we set the SEC_IN_MEMORY flag for all of these | |
4499 | sections. */ | |
4500 | flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY; | |
4501 | ||
8af74670 ILT |
4502 | /* A dynamically linked executable has a .interp section, but a |
4503 | shared library does not. */ | |
4504 | if (! info->shared) | |
4505 | { | |
4506 | s = bfd_make_section (abfd, ".interp"); | |
4507 | if (s == NULL | |
4508 | || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)) | |
4509 | return false; | |
4510 | } | |
013dec1a ILT |
4511 | |
4512 | s = bfd_make_section (abfd, ".dynamic"); | |
4513 | if (s == NULL | |
4514 | || ! bfd_set_section_flags (abfd, s, flags) | |
4515 | || ! bfd_set_section_alignment (abfd, s, LOG_FILE_ALIGN)) | |
4516 | return false; | |
4517 | ||
4518 | /* The special symbol _DYNAMIC is always set to the start of the | |
4519 | .dynamic section. This call occurs before we have processed the | |
4520 | symbols for any dynamic object, so we don't have to worry about | |
4521 | overriding a dynamic definition. We could set _DYNAMIC in a | |
4522 | linker script, but we only want to define it if we are, in fact, | |
4523 | creating a .dynamic section. We don't want to define it if there | |
4524 | is no .dynamic section, since on some ELF platforms the start up | |
4525 | code examines it to decide how to initialize the process. */ | |
4526 | h = NULL; | |
4527 | if (! (_bfd_generic_link_add_one_symbol | |
4528 | (info, abfd, "_DYNAMIC", BSF_GLOBAL, s, (bfd_vma) 0, | |
4529 | (const char *) NULL, false, get_elf_backend_data (abfd)->collect, | |
4530 | (struct bfd_link_hash_entry **) &h))) | |
4531 | return false; | |
4532 | h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR; | |
4533 | ||
4534 | s = bfd_make_section (abfd, ".dynsym"); | |
4535 | if (s == NULL | |
4536 | || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY) | |
4537 | || ! bfd_set_section_alignment (abfd, s, LOG_FILE_ALIGN)) | |
4538 | return false; | |
4539 | ||
4540 | /* The first .dynsym symbol is a dummy. */ | |
4541 | elf_hash_table (info)->dynsymcount = 1; | |
4542 | ||
4543 | s = bfd_make_section (abfd, ".dynstr"); | |
4544 | if (s == NULL | |
4545 | || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)) | |
4546 | return false; | |
4547 | ||
4548 | /* Create a strtab to hold the dynamic symbol names. */ | |
4549 | elf_hash_table (info)->dynstr = bfd_new_strtab (abfd); | |
4550 | if (elf_hash_table (info)->dynstr == NULL) | |
4551 | return false; | |
4552 | ||
4553 | s = bfd_make_section (abfd, ".hash"); | |
4554 | if (s == NULL | |
4555 | || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY) | |
4556 | || ! bfd_set_section_alignment (abfd, s, LOG_FILE_ALIGN)) | |
4557 | return false; | |
4558 | ||
4559 | /* Let the backend create the rest of the sections. This lets the | |
4560 | backend set the right flags. The backend will normally create | |
4561 | the .got and .plt sections. */ | |
4562 | bed = get_elf_backend_data (abfd); | |
4563 | return (*bed->elf_backend_create_dynamic_sections) (abfd, info); | |
4564 | } | |
4565 | ||
4566 | /* Add an entry to the .dynamic table. */ | |
4567 | ||
4568 | boolean | |
4569 | elf_add_dynamic_entry (info, tag, val) | |
4570 | struct bfd_link_info *info; | |
4571 | bfd_vma tag; | |
4572 | bfd_vma val; | |
4573 | { | |
4574 | Elf_Internal_Dyn dyn; | |
4575 | bfd *dynobj; | |
4576 | asection *s; | |
4577 | size_t newsize; | |
4578 | bfd_byte *newcontents; | |
4579 | ||
4580 | dynobj = elf_hash_table (info)->dynobj; | |
4581 | ||
4582 | s = bfd_get_section_by_name (dynobj, ".dynamic"); | |
4583 | BFD_ASSERT (s != NULL); | |
4584 | ||
4585 | newsize = s->_raw_size + sizeof (Elf_External_Dyn); | |
4586 | if (s->contents == NULL) | |
4587 | newcontents = (bfd_byte *) malloc (newsize); | |
4588 | else | |
4589 | newcontents = (bfd_byte *) realloc (s->contents, newsize); | |
4590 | if (newcontents == NULL) | |
4591 | { | |
4592 | bfd_set_error (bfd_error_no_memory); | |
4593 | return false; | |
4594 | } | |
4595 | ||
4596 | dyn.d_tag = tag; | |
4597 | dyn.d_un.d_val = val; | |
4598 | elf_swap_dyn_out (dynobj, &dyn, | |
4599 | (Elf_External_Dyn *) (newcontents + s->_raw_size)); | |
4600 | ||
4601 | s->_raw_size = newsize; | |
4602 | s->contents = newcontents; | |
4603 | ||
4604 | return true; | |
4605 | } | |
4606 | ||
4607 | /* Record an assignment to a symbol made by a linker script. We need | |
4608 | this in case some dynamic object refers to this symbol. */ | |
4609 | ||
4610 | /*ARGSUSED*/ | |
4611 | boolean | |
4612 | NAME(bfd_elf,record_link_assignment) (output_bfd, info, name) | |
4613 | bfd *output_bfd; | |
4614 | struct bfd_link_info *info; | |
4615 | const char *name; | |
4616 | { | |
4617 | struct elf_link_hash_entry *h; | |
4618 | ||
4619 | /* This is called after we have examined all the input objects. If | |
4620 | the symbol does not exist, it merely means that no object refers | |
4621 | to it, and we can just ignore it at this point. */ | |
4622 | h = elf_link_hash_lookup (elf_hash_table (info), name, | |
4623 | false, false, false); | |
4624 | if (h == NULL) | |
4625 | return true; | |
4626 | ||
4627 | h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR; | |
4628 | ||
4629 | if ((h->elf_link_hash_flags & (ELF_LINK_HASH_DEF_DYNAMIC | |
4630 | | ELF_LINK_HASH_REF_DYNAMIC)) != 0 | |
4631 | && h->dynindx == -1) | |
4632 | { | |
4633 | if (! elf_link_record_dynamic_symbol (info, h)) | |
4634 | return false; | |
4635 | ||
4636 | /* If this is a weak defined symbol, and we know a corresponding | |
4637 | real symbol from the same dynamic object, make sure the real | |
4638 | symbol is also made into a dynamic symbol. */ | |
4639 | if (h->weakdef != NULL | |
4640 | && h->weakdef->dynindx == -1) | |
4641 | { | |
4642 | if (! elf_link_record_dynamic_symbol (info, h->weakdef)) | |
4643 | return false; | |
4644 | } | |
4645 | } | |
4646 | ||
4647 | return true; | |
4648 | } | |
4649 | ||
4650 | /* Array used to determine the number of hash table buckets to use | |
4651 | based on the number of symbols there are. If there are fewer than | |
4652 | 3 symbols we use 1 bucket, fewer than 17 symbols we use 3 buckets, | |
4653 | fewer than 37 we use 17 buckets, and so forth. We never use more | |
4654 | than 521 buckets. */ | |
4655 | ||
4656 | static const size_t elf_buckets[] = | |
4657 | { | |
4658 | 1, 3, 17, 37, 67, 97, 131, 197, 263, 521, 0 | |
4659 | }; | |
4660 | ||
4661 | /* Set up the sizes and contents of the ELF dynamic sections. This is | |
4662 | called by the ELF linker emulation before_allocation routine. We | |
4663 | must set the sizes of the sections before the linker sets the | |
4664 | addresses of the various sections. */ | |
4665 | ||
4666 | boolean | |
f9779aad | 4667 | NAME(bfd_elf,size_dynamic_sections) (output_bfd, rpath, info, sinterpptr) |
013dec1a | 4668 | bfd *output_bfd; |
f9779aad | 4669 | const char *rpath; |
013dec1a | 4670 | struct bfd_link_info *info; |
7c726b66 | 4671 | asection **sinterpptr; |
013dec1a ILT |
4672 | { |
4673 | bfd *dynobj; | |
4674 | size_t dynsymcount; | |
4675 | asection *s; | |
4676 | Elf_Internal_Sym isym; | |
4677 | size_t i; | |
4678 | size_t bucketcount; | |
4679 | struct elf_backend_data *bed; | |
4680 | ||
7c726b66 ILT |
4681 | *sinterpptr = NULL; |
4682 | ||
013dec1a ILT |
4683 | dynobj = elf_hash_table (info)->dynobj; |
4684 | dynsymcount = elf_hash_table (info)->dynsymcount; | |
4685 | ||
4686 | /* If there were no dynamic objects in the link, there is nothing to | |
4687 | do here. */ | |
4688 | if (dynobj == NULL) | |
4689 | return true; | |
4690 | ||
7c726b66 | 4691 | *sinterpptr = bfd_get_section_by_name (dynobj, ".interp"); |
8af74670 | 4692 | BFD_ASSERT (*sinterpptr != NULL || info->shared); |
7c726b66 | 4693 | |
013dec1a ILT |
4694 | /* Set the size of the .dynsym and .hash sections. We counted the |
4695 | number of dynamic symbols in elf_link_add_object_symbols. We | |
4696 | will build the contents of .dynsym and .hash when we build the | |
4697 | final symbol table, because until then we do not know the correct | |
4698 | value to give the symbols. We built the .dynstr section as we | |
4699 | went along in elf_link_add_object_symbols. */ | |
4700 | s = bfd_get_section_by_name (dynobj, ".dynsym"); | |
4701 | BFD_ASSERT (s != NULL); | |
4702 | s->_raw_size = dynsymcount * sizeof (Elf_External_Sym); | |
4703 | s->contents = (bfd_byte *) bfd_alloc (output_bfd, s->_raw_size); | |
4704 | if (s->contents == NULL && s->_raw_size != 0) | |
4705 | { | |
4706 | bfd_set_error (bfd_error_no_memory); | |
4707 | return false; | |
4708 | } | |
4709 | ||
4710 | /* The first entry in .dynsym is a dummy symbol. */ | |
4711 | isym.st_value = 0; | |
4712 | isym.st_size = 0; | |
4713 | isym.st_name = 0; | |
4714 | isym.st_info = 0; | |
4715 | isym.st_other = 0; | |
4716 | isym.st_shndx = 0; | |
4717 | elf_swap_symbol_out (output_bfd, &isym, | |
4718 | (Elf_External_Sym *) s->contents); | |
4719 | ||
4720 | for (i = 0; elf_buckets[i] != 0; i++) | |
4721 | { | |
4722 | bucketcount = elf_buckets[i]; | |
4723 | if (dynsymcount < elf_buckets[i + 1]) | |
4724 | break; | |
4725 | } | |
4726 | ||
4727 | s = bfd_get_section_by_name (dynobj, ".hash"); | |
4728 | BFD_ASSERT (s != NULL); | |
4729 | s->_raw_size = (2 + bucketcount + dynsymcount) * (ARCH_SIZE / 8); | |
4730 | s->contents = (bfd_byte *) bfd_alloc (output_bfd, s->_raw_size); | |
4731 | if (s->contents == NULL) | |
4732 | { | |
4733 | bfd_set_error (bfd_error_no_memory); | |
4734 | return false; | |
4735 | } | |
4736 | memset (s->contents, 0, s->_raw_size); | |
4737 | ||
4738 | put_word (output_bfd, bucketcount, s->contents); | |
4739 | put_word (output_bfd, dynsymcount, s->contents + (ARCH_SIZE / 8)); | |
4740 | ||
4741 | elf_hash_table (info)->bucketcount = bucketcount; | |
4742 | ||
f9779aad ILT |
4743 | if (rpath != NULL) |
4744 | { | |
4745 | unsigned long indx; | |
4746 | ||
4747 | indx = bfd_add_to_strtab (dynobj, elf_hash_table (info)->dynstr, rpath); | |
4748 | if (indx == (unsigned long) -1 | |
4749 | || ! elf_add_dynamic_entry (info, DT_RPATH, indx)) | |
4750 | return false; | |
4751 | } | |
4752 | ||
013dec1a ILT |
4753 | s = bfd_get_section_by_name (dynobj, ".dynstr"); |
4754 | BFD_ASSERT (s != NULL); | |
4755 | s->_raw_size = elf_hash_table (info)->dynstr->length; | |
4756 | s->contents = (unsigned char *) elf_hash_table (info)->dynstr->tab; | |
4757 | ||
4758 | /* Find all symbols which were defined in a dynamic object and make | |
4759 | the backend pick a reasonable value for them. */ | |
4760 | elf_link_hash_traverse (elf_hash_table (info), | |
4761 | elf_adjust_dynamic_symbol, | |
4762 | (PTR) info); | |
4763 | ||
4764 | /* Add some entries to the .dynamic section. We fill in some of the | |
4765 | values later, in elf_bfd_final_link, but we must add the entries | |
4766 | now so that we know the final size of the .dynamic section. */ | |
4767 | if (bfd_get_section_by_name (output_bfd, ".init") != NULL) | |
4768 | { | |
4769 | if (! elf_add_dynamic_entry (info, DT_INIT, 0)) | |
4770 | return false; | |
4771 | } | |
4772 | if (bfd_get_section_by_name (output_bfd, ".fini") != NULL) | |
4773 | { | |
4774 | if (! elf_add_dynamic_entry (info, DT_FINI, 0)) | |
4775 | return false; | |
4776 | } | |
4777 | if (! elf_add_dynamic_entry (info, DT_HASH, 0) | |
4778 | || ! elf_add_dynamic_entry (info, DT_STRTAB, 0) | |
4779 | || ! elf_add_dynamic_entry (info, DT_SYMTAB, 0) | |
4780 | || ! elf_add_dynamic_entry (info, DT_STRSZ, | |
4781 | elf_hash_table (info)->dynstr->length) | |
4782 | || ! elf_add_dynamic_entry (info, DT_SYMENT, | |
4783 | sizeof (Elf_External_Sym))) | |
4784 | return false; | |
4785 | ||
4786 | /* The backend must work out the sizes of all the other dynamic | |
4787 | sections. */ | |
4788 | bed = get_elf_backend_data (output_bfd); | |
4789 | if (! (*bed->elf_backend_size_dynamic_sections) (output_bfd, info)) | |
4790 | return false; | |
4791 | ||
4792 | return elf_add_dynamic_entry (info, DT_NULL, 0); | |
4793 | } | |
4794 | ||
4795 | /* Make the backend pick a good value for a dynamic symbol. This is | |
4796 | called via elf_link_hash_traverse, and also calls itself | |
4797 | recursively. */ | |
4798 | ||
4799 | static boolean | |
4800 | elf_adjust_dynamic_symbol (h, data) | |
4801 | struct elf_link_hash_entry *h; | |
4802 | PTR data; | |
4803 | { | |
4804 | struct bfd_link_info *info = (struct bfd_link_info *) data; | |
4805 | bfd *dynobj; | |
4806 | struct elf_backend_data *bed; | |
4807 | ||
4808 | /* If this symbol is not defined by a dynamic object, or is not | |
4809 | referenced by a regular object, ignore it. FIXME: Do we need to | |
4810 | worry about symbols which are defined by one dynamic object and | |
4811 | referenced by another one? */ | |
4812 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0 | |
4813 | || (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0 | |
4814 | || (h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) == 0) | |
4815 | return true; | |
4816 | ||
4817 | /* If we've already adjusted this symbol, don't do it again. This | |
4818 | can happen via a recursive call. */ | |
4819 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DYNAMIC_ADJUSTED) != 0) | |
4820 | return true; | |
4821 | ||
4822 | /* Don't look at this symbol again. Note that we must set this | |
4823 | after checking the above conditions, because we may look at a | |
4824 | symbol once, decide not to do anything, and then get called | |
4825 | recursively later after REF_REGULAR is set below. */ | |
4826 | h->elf_link_hash_flags |= ELF_LINK_HASH_DYNAMIC_ADJUSTED; | |
4827 | ||
4828 | /* If this is a weak definition, and we know a real definition, and | |
4829 | the real symbol is not itself defined by a regular object file, | |
4830 | then get a good value for the real definition. We handle the | |
4831 | real symbol first, for the convenience of the backend routine. | |
4832 | ||
4833 | Note that there is a confusing case here. If the real definition | |
4834 | is defined by a regular object file, we don't get the real symbol | |
4835 | from the dynamic object, but we do get the weak symbol. If the | |
4836 | processor backend uses a COPY reloc, then if some routine in the | |
4837 | dynamic object changes the real symbol, we will not see that | |
4838 | change in the corresponding weak symbol. This is the way other | |
4839 | ELF linkers work as well, and seems to be a result of the shared | |
4840 | library model. | |
4841 | ||
4842 | I will clarify this issue. Most SVR4 shared libraries define the | |
4843 | variable _timezone and define timezone as a weak synonym. The | |
4844 | tzset call changes _timezone. If you write | |
4845 | extern int timezone; | |
4846 | int _timezone = 5; | |
4847 | int main () { tzset (); printf ("%d %d\n", timezone, _timezone); } | |
4848 | you might expect that, since timezone is a synonym for _timezone, | |
4849 | the same number will print both times. However, if the processor | |
4850 | backend uses a COPY reloc, then actually timezone will be copied | |
4851 | into your process image, and, since you define _timezone | |
4852 | yourself, _timezone will not. Thus timezone and _timezone will | |
4853 | wind up at different memory locations. The tzset call will set | |
4854 | _timezone, leaving timezone unchanged. */ | |
4855 | ||
4856 | if (h->weakdef != NULL) | |
4857 | { | |
4858 | struct elf_link_hash_entry *weakdef; | |
4859 | ||
4860 | BFD_ASSERT (h->root.type == bfd_link_hash_defined); | |
4861 | weakdef = h->weakdef; | |
4862 | BFD_ASSERT (weakdef->root.type == bfd_link_hash_defined); | |
4863 | BFD_ASSERT (weakdef->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC); | |
4864 | if ((weakdef->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0 | |
4865 | || (weakdef->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) == 0) | |
4866 | { | |
4867 | /* This symbol is defined or referenced by a regular object | |
4868 | file, so we will not do anything special. Clear weakdef | |
4869 | for the convenience of the processor backend. */ | |
4870 | h->weakdef = NULL; | |
4871 | } | |
4872 | else | |
4873 | { | |
4874 | /* There is an implicit reference by a regular object file | |
4875 | via the weak symbol. */ | |
4876 | weakdef->elf_link_hash_flags |= ELF_LINK_HASH_REF_REGULAR; | |
4877 | if (! elf_adjust_dynamic_symbol (weakdef, (PTR) info)) | |
4878 | return false; | |
4879 | } | |
4880 | } | |
4881 | ||
4882 | dynobj = elf_hash_table (info)->dynobj; | |
4883 | bed = get_elf_backend_data (dynobj); | |
4884 | if (! (*bed->elf_backend_adjust_dynamic_symbol) (info, h)) | |
4885 | { | |
4886 | /* FIXME: No way to return error. */ | |
4887 | abort (); | |
4888 | } | |
4889 | ||
4890 | return true; | |
4891 | } | |
6ec3bb6a ILT |
4892 | \f |
4893 | /* Final phase of ELF linker. */ | |
4894 | ||
4895 | /* A structure we use to avoid passing large numbers of arguments. */ | |
4896 | ||
4897 | struct elf_final_link_info | |
4898 | { | |
4899 | /* General link information. */ | |
4900 | struct bfd_link_info *info; | |
4901 | /* Output BFD. */ | |
4902 | bfd *output_bfd; | |
4903 | /* Symbol string table. */ | |
4904 | struct strtab *symstrtab; | |
013dec1a ILT |
4905 | /* .dynsym section. */ |
4906 | asection *dynsym_sec; | |
4907 | /* .hash section. */ | |
4908 | asection *hash_sec; | |
6ec3bb6a ILT |
4909 | /* Buffer large enough to hold contents of any section. */ |
4910 | bfd_byte *contents; | |
4911 | /* Buffer large enough to hold external relocs of any section. */ | |
4912 | PTR external_relocs; | |
4913 | /* Buffer large enough to hold internal relocs of any section. */ | |
4914 | Elf_Internal_Rela *internal_relocs; | |
4915 | /* Buffer large enough to hold external local symbols of any input | |
4916 | BFD. */ | |
4917 | Elf_External_Sym *external_syms; | |
4918 | /* Buffer large enough to hold internal local symbols of any input | |
4919 | BFD. */ | |
4920 | Elf_Internal_Sym *internal_syms; | |
4921 | /* Array large enough to hold a symbol index for each local symbol | |
4922 | of any input BFD. */ | |
4923 | long *indices; | |
4924 | /* Array large enough to hold a section pointer for each local | |
4925 | symbol of any input BFD. */ | |
4926 | asection **sections; | |
4927 | /* Buffer to hold swapped out symbols. */ | |
4928 | Elf_External_Sym *symbuf; | |
4929 | /* Number of swapped out symbols in buffer. */ | |
4930 | size_t symbuf_count; | |
4931 | /* Number of symbols which fit in symbuf. */ | |
4932 | size_t symbuf_size; | |
4933 | }; | |
4934 | ||
4935 | static boolean elf_link_output_sym | |
71edd06d ILT |
4936 | PARAMS ((struct elf_final_link_info *, const char *, |
4937 | Elf_Internal_Sym *, asection *)); | |
6ec3bb6a ILT |
4938 | static boolean elf_link_flush_output_syms |
4939 | PARAMS ((struct elf_final_link_info *)); | |
4940 | static boolean elf_link_output_extsym | |
4941 | PARAMS ((struct elf_link_hash_entry *, PTR)); | |
4942 | static boolean elf_link_input_bfd | |
4943 | PARAMS ((struct elf_final_link_info *, bfd *)); | |
4944 | static boolean elf_reloc_link_order | |
4945 | PARAMS ((bfd *, struct bfd_link_info *, asection *, | |
4946 | struct bfd_link_order *)); | |
4947 | ||
4948 | /* Do the final step of an ELF link. */ | |
4949 | ||
4950 | boolean | |
4951 | elf_bfd_final_link (abfd, info) | |
4952 | bfd *abfd; | |
4953 | struct bfd_link_info *info; | |
4954 | { | |
013dec1a | 4955 | bfd *dynobj; |
6ec3bb6a ILT |
4956 | struct elf_final_link_info finfo; |
4957 | register asection *o; | |
4958 | register struct bfd_link_order *p; | |
4959 | register bfd *sub; | |
4960 | size_t max_contents_size; | |
4961 | size_t max_external_reloc_size; | |
4962 | size_t max_internal_reloc_count; | |
4963 | size_t max_sym_count; | |
4964 | file_ptr off; | |
4965 | Elf_Internal_Sym elfsym; | |
013dec1a | 4966 | unsigned int i; |
6ec3bb6a ILT |
4967 | Elf_Internal_Shdr *symtab_hdr; |
4968 | Elf_Internal_Shdr *symstrtab_hdr; | |
71edd06d | 4969 | struct elf_backend_data *bed = get_elf_backend_data (abfd); |
6ec3bb6a | 4970 | |
0ff5d3a6 ILT |
4971 | if (info->shared) |
4972 | { | |
4973 | fprintf (stderr, | |
4974 | "Generating ELF shared libraries is not yet supported\n"); | |
4975 | bfd_set_error (bfd_error_invalid_operation); | |
4976 | return false; | |
4977 | } | |
4978 | ||
013dec1a ILT |
4979 | dynobj = elf_hash_table (info)->dynobj; |
4980 | ||
6ec3bb6a ILT |
4981 | finfo.info = info; |
4982 | finfo.output_bfd = abfd; | |
4983 | finfo.symstrtab = bfd_new_strtab (abfd); | |
4984 | if (finfo.symstrtab == NULL) | |
4985 | return false; | |
013dec1a ILT |
4986 | if (dynobj == NULL) |
4987 | { | |
4988 | finfo.dynsym_sec = NULL; | |
4989 | finfo.hash_sec = NULL; | |
4990 | } | |
4991 | else | |
4992 | { | |
4993 | finfo.dynsym_sec = bfd_get_section_by_name (dynobj, ".dynsym"); | |
4994 | finfo.hash_sec = bfd_get_section_by_name (dynobj, ".hash"); | |
4995 | if (finfo.dynsym_sec == NULL | |
4996 | || finfo.hash_sec == NULL) | |
4997 | abort (); | |
4998 | } | |
6ec3bb6a ILT |
4999 | finfo.contents = NULL; |
5000 | finfo.external_relocs = NULL; | |
5001 | finfo.internal_relocs = NULL; | |
5002 | finfo.external_syms = NULL; | |
5003 | finfo.internal_syms = NULL; | |
5004 | finfo.indices = NULL; | |
5005 | finfo.sections = NULL; | |
5006 | finfo.symbuf = NULL; | |
5007 | finfo.symbuf_count = 0; | |
5008 | ||
5009 | /* Count up the number of relocations we will output for each output | |
5010 | section, so that we know the sizes of the reloc sections. We | |
5011 | also figure out some maximum sizes. */ | |
5012 | max_contents_size = 0; | |
5013 | max_external_reloc_size = 0; | |
5014 | max_internal_reloc_count = 0; | |
5015 | max_sym_count = 0; | |
5016 | for (o = abfd->sections; o != (asection *) NULL; o = o->next) | |
5017 | { | |
5018 | o->reloc_count = 0; | |
5019 | ||
5020 | for (p = o->link_order_head; p != NULL; p = p->next) | |
5021 | { | |
5022 | if (p->type == bfd_section_reloc_link_order | |
5023 | || p->type == bfd_symbol_reloc_link_order) | |
5024 | ++o->reloc_count; | |
5025 | else if (p->type == bfd_indirect_link_order) | |
5026 | { | |
5027 | asection *sec; | |
5028 | ||
5029 | sec = p->u.indirect.section; | |
5030 | ||
5031 | if (info->relocateable) | |
5032 | o->reloc_count += sec->reloc_count; | |
5033 | ||
5034 | if (sec->_raw_size > max_contents_size) | |
5035 | max_contents_size = sec->_raw_size; | |
5036 | if (sec->_cooked_size > max_contents_size) | |
5037 | max_contents_size = sec->_cooked_size; | |
5038 | ||
5039 | /* We are interested in just local symbols, not all | |
5040 | symbols. */ | |
5315c428 ILT |
5041 | if (bfd_get_flavour (sec->owner) == bfd_target_elf_flavour) |
5042 | { | |
5043 | size_t sym_count; | |
5044 | ||
5045 | if (elf_bad_symtab (sec->owner)) | |
5046 | sym_count = (elf_tdata (sec->owner)->symtab_hdr.sh_size | |
5047 | / sizeof (Elf_External_Sym)); | |
5048 | else | |
5049 | sym_count = elf_tdata (sec->owner)->symtab_hdr.sh_info; | |
5050 | ||
5051 | if (sym_count > max_sym_count) | |
5052 | max_sym_count = sym_count; | |
6ec3bb6a | 5053 | |
6c8fa8e6 ILT |
5054 | if ((sec->flags & SEC_RELOC) != 0) |
5055 | { | |
5056 | size_t ext_size; | |
6ec3bb6a | 5057 | |
6c8fa8e6 ILT |
5058 | ext_size = elf_section_data (sec)->rel_hdr.sh_size; |
5059 | if (ext_size > max_external_reloc_size) | |
5060 | max_external_reloc_size = ext_size; | |
5061 | if (sec->reloc_count > max_internal_reloc_count) | |
5062 | max_internal_reloc_count = sec->reloc_count; | |
5063 | } | |
6ec3bb6a ILT |
5064 | } |
5065 | } | |
5066 | } | |
5067 | ||
5068 | if (o->reloc_count > 0) | |
5069 | o->flags |= SEC_RELOC; | |
5070 | else | |
5071 | { | |
5072 | /* Explicitly clear the SEC_RELOC flag. The linker tends to | |
5073 | set it (this is probably a bug) and if it is set | |
5074 | assign_section_numbers will create a reloc section. */ | |
5075 | o->flags &=~ SEC_RELOC; | |
5076 | } | |
5077 | } | |
5078 | ||
5079 | /* Figure out the file positions for everything but the symbol table | |
5080 | and the relocs. We set symcount to force assign_section_numbers | |
5081 | to create a symbol table. */ | |
5082 | abfd->symcount = info->strip == strip_all ? 0 : 1; | |
5083 | BFD_ASSERT (! abfd->output_has_begun); | |
5084 | if (! elf_compute_section_file_positions (abfd, info)) | |
5085 | goto error_return; | |
5086 | ||
5087 | /* That created the reloc sections. Set their sizes, and assign | |
5088 | them file positions, and allocate some buffers. */ | |
5089 | for (o = abfd->sections; o != NULL; o = o->next) | |
5090 | { | |
5091 | if ((o->flags & SEC_RELOC) != 0) | |
5092 | { | |
5093 | Elf_Internal_Shdr *rel_hdr; | |
5094 | register struct elf_link_hash_entry **p, **pend; | |
5095 | ||
5096 | rel_hdr = &elf_section_data (o)->rel_hdr; | |
5097 | ||
5098 | rel_hdr->sh_size = rel_hdr->sh_entsize * o->reloc_count; | |
5099 | ||
5100 | /* The contents field must last into write_object_contents, | |
5101 | so we allocate it with bfd_alloc rather than malloc. */ | |
5102 | rel_hdr->contents = (PTR) bfd_alloc (abfd, rel_hdr->sh_size); | |
5103 | if (rel_hdr->contents == NULL && rel_hdr->sh_size != 0) | |
5104 | { | |
5105 | bfd_set_error (bfd_error_no_memory); | |
5106 | goto error_return; | |
5107 | } | |
5108 | ||
5109 | p = ((struct elf_link_hash_entry **) | |
5110 | malloc (o->reloc_count | |
5111 | * sizeof (struct elf_link_hash_entry *))); | |
5112 | if (p == NULL && o->reloc_count != 0) | |
5113 | { | |
5114 | bfd_set_error (bfd_error_no_memory); | |
5115 | goto error_return; | |
5116 | } | |
5117 | elf_section_data (o)->rel_hashes = p; | |
5118 | pend = p + o->reloc_count; | |
5119 | for (; p < pend; p++) | |
5120 | *p = NULL; | |
5121 | ||
5122 | /* Use the reloc_count field as an index when outputting the | |
5123 | relocs. */ | |
5124 | o->reloc_count = 0; | |
5125 | } | |
5126 | } | |
5127 | ||
5128 | assign_file_positions_for_relocs (abfd); | |
5129 | ||
5130 | /* We have now assigned file positions for all the sections except | |
5131 | .symtab and .strtab. We start the .symtab section at the current | |
5132 | file position, and write directly to it. We build the .strtab | |
5133 | section in memory. When we add .dynsym support, we will build | |
5134 | that in memory as well (.dynsym is smaller than .symtab). */ | |
5135 | abfd->symcount = 0; | |
5136 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
5137 | /* sh_name is set in prep_headers. */ | |
5138 | symtab_hdr->sh_type = SHT_SYMTAB; | |
5139 | symtab_hdr->sh_flags = 0; | |
5140 | symtab_hdr->sh_addr = 0; | |
5141 | symtab_hdr->sh_size = 0; | |
5142 | symtab_hdr->sh_entsize = sizeof (Elf_External_Sym); | |
5143 | /* sh_link is set in assign_section_numbers. */ | |
5144 | /* sh_info is set below. */ | |
5145 | /* sh_offset is set just below. */ | |
5146 | symtab_hdr->sh_addralign = 4; /* FIXME: system dependent? */ | |
5147 | ||
5148 | off = elf_tdata (abfd)->next_file_pos; | |
013dec1a | 5149 | off = assign_file_position_for_section (symtab_hdr, off, true); |
6ec3bb6a ILT |
5150 | |
5151 | /* Note that at this point elf_tdata (abfd)->next_file_pos is | |
5152 | incorrect. We do not yet know the size of the .symtab section. | |
5153 | We correct next_file_pos below, after we do know the size. */ | |
5154 | ||
5155 | /* Allocate a buffer to hold swapped out symbols. This is to avoid | |
5156 | continuously seeking to the right position in the file. */ | |
5157 | if (! info->keep_memory || max_sym_count < 20) | |
5158 | finfo.symbuf_size = 20; | |
5159 | else | |
5160 | finfo.symbuf_size = max_sym_count; | |
5161 | finfo.symbuf = ((Elf_External_Sym *) | |
5162 | malloc (finfo.symbuf_size * sizeof (Elf_External_Sym))); | |
5163 | if (finfo.symbuf == NULL) | |
5164 | { | |
5165 | bfd_set_error (bfd_error_no_memory); | |
5166 | goto error_return; | |
5167 | } | |
5168 | ||
5169 | /* Start writing out the symbol table. The first symbol is always a | |
5170 | dummy symbol. */ | |
5171 | elfsym.st_value = 0; | |
5172 | elfsym.st_size = 0; | |
5173 | elfsym.st_info = 0; | |
5174 | elfsym.st_other = 0; | |
5175 | elfsym.st_shndx = SHN_UNDEF; | |
71edd06d ILT |
5176 | if (! elf_link_output_sym (&finfo, (const char *) NULL, |
5177 | &elfsym, bfd_und_section_ptr)) | |
6ec3bb6a ILT |
5178 | goto error_return; |
5179 | ||
5180 | #if 0 | |
5181 | /* Some standard ELF linkers do this, but we don't because it causes | |
5182 | bootstrap comparison failures. */ | |
5183 | /* Output a file symbol for the output file as the second symbol. | |
5184 | We output this even if we are discarding local symbols, although | |
5185 | I'm not sure if this is correct. */ | |
5186 | elfsym.st_value = 0; | |
5187 | elfsym.st_size = 0; | |
5188 | elfsym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE); | |
5189 | elfsym.st_other = 0; | |
5190 | elfsym.st_shndx = SHN_ABS; | |
71edd06d ILT |
5191 | if (! elf_link_output_sym (&finfo, bfd_get_filename (abfd), |
5192 | &elfsym, bfd_abs_section_ptr)) | |
6ec3bb6a ILT |
5193 | goto error_return; |
5194 | #endif | |
5195 | ||
5196 | /* Output a symbol for each section. We output these even if we are | |
5197 | discarding local symbols, since they are used for relocs. These | |
5198 | symbols have no names. We store the index of each one in the | |
5199 | index field of the section, so that we can find it again when | |
5200 | outputting relocs. */ | |
5201 | elfsym.st_value = 0; | |
5202 | elfsym.st_size = 0; | |
5203 | elfsym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION); | |
5204 | elfsym.st_other = 0; | |
013dec1a | 5205 | for (i = 1; i < elf_elfheader (abfd)->e_shnum; i++) |
6ec3bb6a | 5206 | { |
013dec1a | 5207 | o = section_from_elf_index (abfd, i); |
badd23e3 | 5208 | if (! bfd_is_abs_section (o)) |
013dec1a ILT |
5209 | o->target_index = abfd->symcount; |
5210 | elfsym.st_shndx = i; | |
71edd06d ILT |
5211 | if (! elf_link_output_sym (&finfo, (const char *) NULL, |
5212 | &elfsym, o)) | |
6ec3bb6a ILT |
5213 | goto error_return; |
5214 | } | |
5215 | ||
5216 | /* Allocate some memory to hold information read in from the input | |
5217 | files. */ | |
5218 | finfo.contents = (bfd_byte *) malloc (max_contents_size); | |
5219 | finfo.external_relocs = (PTR) malloc (max_external_reloc_size); | |
5220 | finfo.internal_relocs = ((Elf_Internal_Rela *) | |
5221 | malloc (max_internal_reloc_count | |
5222 | * sizeof (Elf_Internal_Rela))); | |
5223 | finfo.external_syms = ((Elf_External_Sym *) | |
5224 | malloc (max_sym_count * sizeof (Elf_External_Sym))); | |
5225 | finfo.internal_syms = ((Elf_Internal_Sym *) | |
5226 | malloc (max_sym_count * sizeof (Elf_Internal_Sym))); | |
5227 | finfo.indices = (long *) malloc (max_sym_count * sizeof (long)); | |
5228 | finfo.sections = (asection **) malloc (max_sym_count * sizeof (asection *)); | |
5229 | if ((finfo.contents == NULL && max_contents_size != 0) | |
5230 | || (finfo.external_relocs == NULL && max_external_reloc_size != 0) | |
5231 | || (finfo.internal_relocs == NULL && max_internal_reloc_count != 0) | |
5232 | || (finfo.external_syms == NULL && max_sym_count != 0) | |
5233 | || (finfo.internal_syms == NULL && max_sym_count != 0) | |
5234 | || (finfo.indices == NULL && max_sym_count != 0) | |
5235 | || (finfo.sections == NULL && max_sym_count != 0)) | |
5236 | { | |
5237 | bfd_set_error (bfd_error_no_memory); | |
5238 | goto error_return; | |
5239 | } | |
5240 | ||
5241 | /* Since ELF permits relocations to be against local symbols, we | |
5242 | must have the local symbols available when we do the relocations. | |
5243 | Since we would rather only read the local symbols once, and we | |
5244 | would rather not keep them in memory, we handle all the | |
5245 | relocations for a single input file at the same time. | |
5246 | ||
5247 | Unfortunately, there is no way to know the total number of local | |
5248 | symbols until we have seen all of them, and the local symbol | |
5249 | indices precede the global symbol indices. This means that when | |
5250 | we are generating relocateable output, and we see a reloc against | |
5251 | a global symbol, we can not know the symbol index until we have | |
5252 | finished examining all the local symbols to see which ones we are | |
5253 | going to output. To deal with this, we keep the relocations in | |
5254 | memory, and don't output them until the end of the link. This is | |
5255 | an unfortunate waste of memory, but I don't see a good way around | |
5256 | it. Fortunately, it only happens when performing a relocateable | |
5257 | link, which is not the common case. FIXME: If keep_memory is set | |
5258 | we could write the relocs out and then read them again; I don't | |
5259 | know how bad the memory loss will be. */ | |
5260 | ||
5261 | for (sub = info->input_bfds; sub != NULL; sub = sub->next) | |
5262 | sub->output_has_begun = false; | |
5263 | for (o = abfd->sections; o != NULL; o = o->next) | |
5264 | { | |
5265 | for (p = o->link_order_head; p != NULL; p = p->next) | |
5266 | { | |
5267 | if (p->type == bfd_indirect_link_order | |
5268 | && (bfd_get_flavour (p->u.indirect.section->owner) | |
5269 | == bfd_target_elf_flavour)) | |
5270 | { | |
5271 | sub = p->u.indirect.section->owner; | |
5272 | if (! sub->output_has_begun) | |
5273 | { | |
5274 | if (! elf_link_input_bfd (&finfo, sub)) | |
5275 | goto error_return; | |
5276 | sub->output_has_begun = true; | |
5277 | } | |
5278 | } | |
5279 | else if (p->type == bfd_section_reloc_link_order | |
5280 | || p->type == bfd_symbol_reloc_link_order) | |
5281 | { | |
5282 | if (! elf_reloc_link_order (abfd, info, o, p)) | |
5283 | goto error_return; | |
5284 | } | |
5285 | else | |
5286 | { | |
5287 | if (! _bfd_default_link_order (abfd, info, o, p)) | |
5288 | goto error_return; | |
5289 | } | |
5290 | } | |
5291 | } | |
5292 | ||
5293 | /* That wrote out all the local symbols. Finish up the symbol table | |
5294 | with the global symbols. */ | |
5295 | ||
5296 | /* The sh_info field records the index of the first non local | |
5297 | symbol. */ | |
5298 | symtab_hdr->sh_info = abfd->symcount; | |
013dec1a ILT |
5299 | if (dynobj != NULL) |
5300 | elf_section_data (finfo.dynsym_sec->output_section)->this_hdr.sh_info = 1; | |
6ec3bb6a ILT |
5301 | |
5302 | /* We get the global symbols from the hash table. */ | |
013dec1a ILT |
5303 | elf_link_hash_traverse (elf_hash_table (info), elf_link_output_extsym, |
5304 | (PTR) &finfo); | |
6ec3bb6a ILT |
5305 | |
5306 | /* Flush all symbols to the file. */ | |
5307 | if (! elf_link_flush_output_syms (&finfo)) | |
5308 | return false; | |
5309 | ||
5310 | /* Now we know the size of the symtab section. */ | |
5311 | off += symtab_hdr->sh_size; | |
5312 | ||
5313 | /* Finish up the symbol string table (.strtab) section. */ | |
5314 | symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr; | |
5315 | /* sh_name was set in prep_headers. */ | |
5316 | symstrtab_hdr->sh_type = SHT_STRTAB; | |
5317 | symstrtab_hdr->sh_flags = 0; | |
5318 | symstrtab_hdr->sh_addr = 0; | |
5319 | symstrtab_hdr->sh_size = finfo.symstrtab->length; | |
5320 | symstrtab_hdr->sh_entsize = 0; | |
5321 | symstrtab_hdr->sh_link = 0; | |
5322 | symstrtab_hdr->sh_info = 0; | |
5323 | /* sh_offset is set just below. */ | |
5324 | symstrtab_hdr->sh_addralign = 1; | |
5325 | symstrtab_hdr->contents = (PTR) finfo.symstrtab->tab; | |
5326 | ||
013dec1a | 5327 | off = assign_file_position_for_section (symstrtab_hdr, off, true); |
6ec3bb6a ILT |
5328 | elf_tdata (abfd)->next_file_pos = off; |
5329 | ||
5330 | /* Adjust the relocs to have the correct symbol indices. */ | |
5331 | for (o = abfd->sections; o != NULL; o = o->next) | |
5332 | { | |
5333 | struct elf_link_hash_entry **rel_hash; | |
5334 | Elf_Internal_Shdr *rel_hdr; | |
6ec3bb6a ILT |
5335 | |
5336 | if ((o->flags & SEC_RELOC) == 0) | |
5337 | continue; | |
5338 | ||
5339 | rel_hash = elf_section_data (o)->rel_hashes; | |
5340 | rel_hdr = &elf_section_data (o)->rel_hdr; | |
5341 | for (i = 0; i < o->reloc_count; i++, rel_hash++) | |
5342 | { | |
5343 | if (*rel_hash == NULL) | |
5344 | continue; | |
5345 | ||
5346 | BFD_ASSERT ((*rel_hash)->indx >= 0); | |
5347 | ||
5348 | if (rel_hdr->sh_entsize == sizeof (Elf_External_Rel)) | |
5349 | { | |
5350 | Elf_External_Rel *erel; | |
5351 | Elf_Internal_Rel irel; | |
5352 | ||
5353 | erel = (Elf_External_Rel *) rel_hdr->contents + i; | |
5354 | elf_swap_reloc_in (abfd, erel, &irel); | |
5355 | irel.r_info = ELF_R_INFO ((*rel_hash)->indx, | |
5356 | ELF_R_TYPE (irel.r_info)); | |
5357 | elf_swap_reloc_out (abfd, &irel, erel); | |
5358 | } | |
5359 | else | |
5360 | { | |
5361 | Elf_External_Rela *erela; | |
5362 | Elf_Internal_Rela irela; | |
5363 | ||
5364 | BFD_ASSERT (rel_hdr->sh_entsize | |
5365 | == sizeof (Elf_External_Rela)); | |
5366 | ||
5367 | erela = (Elf_External_Rela *) rel_hdr->contents + i; | |
5368 | elf_swap_reloca_in (abfd, erela, &irela); | |
5369 | irela.r_info = ELF_R_INFO ((*rel_hash)->indx, | |
5370 | ELF_R_TYPE (irela.r_info)); | |
5371 | elf_swap_reloca_out (abfd, &irela, erela); | |
5372 | } | |
5373 | } | |
5374 | ||
5375 | /* Set the reloc_count field to 0 to prevent write_relocs from | |
5376 | trying to swap the relocs out itself. */ | |
5377 | o->reloc_count = 0; | |
5378 | } | |
5379 | ||
013dec1a ILT |
5380 | /* If we are linking against a dynamic object, finish up the dynamic |
5381 | linking information. */ | |
5382 | if (dynobj != NULL) | |
5383 | { | |
5384 | Elf_External_Dyn *dyncon, *dynconend; | |
013dec1a ILT |
5385 | |
5386 | /* Fix up .dynamic entries. */ | |
5387 | o = bfd_get_section_by_name (dynobj, ".dynamic"); | |
5388 | BFD_ASSERT (o != NULL); | |
5389 | ||
5390 | dyncon = (Elf_External_Dyn *) o->contents; | |
5391 | dynconend = (Elf_External_Dyn *) (o->contents + o->_raw_size); | |
5392 | for (; dyncon < dynconend; dyncon++) | |
5393 | { | |
5394 | Elf_Internal_Dyn dyn; | |
5395 | const char *name; | |
5396 | unsigned int type; | |
5397 | ||
5398 | elf_swap_dyn_in (dynobj, dyncon, &dyn); | |
5399 | ||
5400 | switch (dyn.d_tag) | |
5401 | { | |
5402 | default: | |
5403 | break; | |
5404 | ||
5405 | case DT_INIT: | |
5406 | name = ".init"; | |
5407 | goto get_vma; | |
5408 | case DT_FINI: | |
5409 | name = ".fini"; | |
5410 | goto get_vma; | |
5411 | case DT_HASH: | |
5412 | name = ".hash"; | |
5413 | goto get_vma; | |
5414 | case DT_STRTAB: | |
5415 | name = ".dynstr"; | |
5416 | goto get_vma; | |
5417 | case DT_SYMTAB: | |
5418 | name = ".dynsym"; | |
5419 | get_vma: | |
5420 | o = bfd_get_section_by_name (abfd, name); | |
5421 | BFD_ASSERT (o != NULL); | |
5422 | dyn.d_un.d_ptr = o->vma; | |
5423 | elf_swap_dyn_out (dynobj, &dyn, dyncon); | |
5424 | break; | |
5425 | ||
5426 | case DT_REL: | |
5427 | case DT_RELA: | |
5428 | case DT_RELSZ: | |
5429 | case DT_RELASZ: | |
5430 | if (dyn.d_tag == DT_REL || dyn.d_tag == DT_RELSZ) | |
5431 | type = SHT_REL; | |
5432 | else | |
5433 | type = SHT_RELA; | |
5434 | dyn.d_un.d_val = 0; | |
5435 | for (i = 1; i < elf_elfheader (abfd)->e_shnum; i++) | |
5436 | { | |
5437 | Elf_Internal_Shdr *hdr; | |
5438 | ||
5439 | hdr = elf_elfsections (abfd)[i]; | |
5440 | if (hdr->sh_type == type | |
5441 | && (hdr->sh_flags & SHF_ALLOC) != 0) | |
5442 | { | |
5443 | if (dyn.d_tag == DT_RELSZ || dyn.d_tag == DT_RELASZ) | |
5444 | dyn.d_un.d_val += hdr->sh_size; | |
5445 | else | |
5446 | { | |
5447 | if (dyn.d_un.d_val == 0 | |
5448 | || hdr->sh_addr < dyn.d_un.d_val) | |
5449 | dyn.d_un.d_val = hdr->sh_addr; | |
5450 | } | |
5451 | } | |
5452 | } | |
5453 | elf_swap_dyn_out (dynobj, &dyn, dyncon); | |
5454 | break; | |
5455 | } | |
5456 | } | |
5457 | ||
013dec1a ILT |
5458 | if (! (*bed->elf_backend_finish_dynamic_sections) (abfd, info)) |
5459 | goto error_return; | |
5460 | ||
5461 | for (o = dynobj->sections; o != NULL; o = o->next) | |
5462 | { | |
013dec1a ILT |
5463 | if ((o->flags & SEC_HAS_CONTENTS) == 0) |
5464 | continue; | |
8af74670 ILT |
5465 | if ((o->flags & SEC_IN_MEMORY) == 0) |
5466 | { | |
5467 | BFD_ASSERT (info->shared); | |
5468 | continue; | |
5469 | } | |
013dec1a ILT |
5470 | if (! bfd_set_section_contents (abfd, o->output_section, |
5471 | o->contents, o->output_offset, | |
5472 | o->_raw_size)) | |
5473 | goto error_return; | |
013dec1a ILT |
5474 | } |
5475 | } | |
5476 | ||
71edd06d ILT |
5477 | /* Now backend stuff. */ |
5478 | if (bed->elf_backend_final_write_processing) | |
5479 | (*bed->elf_backend_final_write_processing) (abfd, NULL); | |
5480 | ||
6ec3bb6a ILT |
5481 | if (finfo.contents != NULL) |
5482 | free (finfo.contents); | |
5483 | if (finfo.external_relocs != NULL) | |
5484 | free (finfo.external_relocs); | |
5485 | if (finfo.internal_relocs != NULL) | |
5486 | free (finfo.internal_relocs); | |
5487 | if (finfo.external_syms != NULL) | |
5488 | free (finfo.external_syms); | |
5489 | if (finfo.internal_syms != NULL) | |
5490 | free (finfo.internal_syms); | |
5491 | if (finfo.indices != NULL) | |
5492 | free (finfo.indices); | |
5493 | if (finfo.sections != NULL) | |
5494 | free (finfo.sections); | |
5495 | if (finfo.symbuf != NULL) | |
5496 | free (finfo.symbuf); | |
5497 | for (o = abfd->sections; o != NULL; o = o->next) | |
5498 | { | |
5499 | if ((o->flags & SEC_RELOC) != 0 | |
5500 | && elf_section_data (o)->rel_hashes != NULL) | |
5501 | free (elf_section_data (o)->rel_hashes); | |
5502 | } | |
5503 | ||
5504 | return true; | |
5505 | ||
5506 | error_return: | |
5507 | if (finfo.contents != NULL) | |
5508 | free (finfo.contents); | |
5509 | if (finfo.external_relocs != NULL) | |
5510 | free (finfo.external_relocs); | |
5511 | if (finfo.internal_relocs != NULL) | |
5512 | free (finfo.internal_relocs); | |
5513 | if (finfo.external_syms != NULL) | |
5514 | free (finfo.external_syms); | |
5515 | if (finfo.internal_syms != NULL) | |
5516 | free (finfo.internal_syms); | |
5517 | if (finfo.indices != NULL) | |
5518 | free (finfo.indices); | |
5519 | if (finfo.sections != NULL) | |
5520 | free (finfo.sections); | |
5521 | if (finfo.symbuf != NULL) | |
5522 | free (finfo.symbuf); | |
5523 | for (o = abfd->sections; o != NULL; o = o->next) | |
5524 | { | |
5525 | if ((o->flags & SEC_RELOC) != 0 | |
5526 | && elf_section_data (o)->rel_hashes != NULL) | |
5527 | free (elf_section_data (o)->rel_hashes); | |
5528 | } | |
5529 | ||
5530 | return false; | |
5531 | } | |
5532 | ||
5533 | /* Add a symbol to the output symbol table. */ | |
5534 | ||
5535 | static boolean | |
71edd06d | 5536 | elf_link_output_sym (finfo, name, elfsym, input_sec) |
6ec3bb6a ILT |
5537 | struct elf_final_link_info *finfo; |
5538 | const char *name; | |
5539 | Elf_Internal_Sym *elfsym; | |
71edd06d | 5540 | asection *input_sec; |
6ec3bb6a | 5541 | { |
71edd06d ILT |
5542 | boolean (*output_symbol_hook) PARAMS ((bfd *, |
5543 | struct bfd_link_info *info, | |
5544 | const char *, | |
5545 | Elf_Internal_Sym *, | |
5546 | asection *)); | |
5547 | ||
5548 | output_symbol_hook = get_elf_backend_data (finfo->output_bfd)-> | |
5549 | elf_backend_link_output_symbol_hook; | |
57a814a9 PS |
5550 | if (output_symbol_hook != NULL) |
5551 | { | |
5552 | if (! ((*output_symbol_hook) | |
5553 | (finfo->output_bfd, finfo->info, name, elfsym, input_sec))) | |
5554 | return false; | |
5555 | } | |
71edd06d | 5556 | |
6ec3bb6a ILT |
5557 | if (name == (const char *) NULL || *name == '\0') |
5558 | elfsym->st_name = 0; | |
5559 | else | |
5560 | { | |
5561 | elfsym->st_name = bfd_add_to_strtab (finfo->output_bfd, | |
5562 | finfo->symstrtab, name); | |
5563 | if (elfsym->st_name == (unsigned long) -1) | |
5564 | return false; | |
5565 | } | |
5566 | ||
5567 | if (finfo->symbuf_count >= finfo->symbuf_size) | |
5568 | { | |
5569 | if (! elf_link_flush_output_syms (finfo)) | |
5570 | return false; | |
5571 | } | |
5572 | ||
5573 | elf_swap_symbol_out (finfo->output_bfd, elfsym, | |
5574 | finfo->symbuf + finfo->symbuf_count); | |
5575 | ++finfo->symbuf_count; | |
5576 | ||
5577 | ++finfo->output_bfd->symcount; | |
5578 | ||
5579 | return true; | |
5580 | } | |
5581 | ||
5582 | /* Flush the output symbols to the file. */ | |
5583 | ||
5584 | static boolean | |
5585 | elf_link_flush_output_syms (finfo) | |
5586 | struct elf_final_link_info *finfo; | |
5587 | { | |
5588 | Elf_Internal_Shdr *symtab; | |
5589 | ||
5590 | symtab = &elf_tdata (finfo->output_bfd)->symtab_hdr; | |
5591 | ||
5592 | if (bfd_seek (finfo->output_bfd, symtab->sh_offset + symtab->sh_size, | |
5593 | SEEK_SET) != 0 | |
5594 | || (bfd_write ((PTR) finfo->symbuf, finfo->symbuf_count, | |
5595 | sizeof (Elf_External_Sym), finfo->output_bfd) | |
5596 | != finfo->symbuf_count * sizeof (Elf_External_Sym))) | |
5597 | return false; | |
5598 | ||
5599 | symtab->sh_size += finfo->symbuf_count * sizeof (Elf_External_Sym); | |
5600 | ||
5601 | finfo->symbuf_count = 0; | |
5602 | ||
5603 | return true; | |
5604 | } | |
5605 | ||
5606 | /* Add an external symbol to the symbol table. This is called from | |
5607 | the hash table traversal routine. */ | |
5608 | ||
5609 | static boolean | |
5610 | elf_link_output_extsym (h, data) | |
5611 | struct elf_link_hash_entry *h; | |
5612 | PTR data; | |
5613 | { | |
5614 | struct elf_final_link_info *finfo = (struct elf_final_link_info *) data; | |
013dec1a | 5615 | boolean strip; |
6ec3bb6a | 5616 | Elf_Internal_Sym sym; |
71edd06d | 5617 | asection *input_sec; |
6ec3bb6a | 5618 | |
013dec1a ILT |
5619 | /* We don't want to output symbols that have never been mentioned by |
5620 | a regular file, or that we have been told to strip. However, if | |
5621 | h->indx is set to -2, the symbol is used by a reloc and we must | |
5622 | output it. */ | |
5623 | if (h->indx == -2) | |
5624 | strip = false; | |
5315c428 ILT |
5625 | else if (((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 |
5626 | || (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0) | |
5627 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0 | |
013dec1a ILT |
5628 | && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) == 0) |
5629 | strip = true; | |
5630 | else if (finfo->info->strip == strip_all | |
5631 | || (finfo->info->strip == strip_some | |
5632 | && bfd_hash_lookup (finfo->info->keep_hash, | |
5633 | h->root.root.string, | |
5634 | false, false) == NULL)) | |
5635 | strip = true; | |
5636 | else | |
5637 | strip = false; | |
5638 | ||
5639 | /* If we're stripping it, and it's not a dynamic symbol, there's | |
5640 | nothing else to do. */ | |
5641 | if (strip && h->dynindx == -1) | |
6ec3bb6a ILT |
5642 | return true; |
5643 | ||
5644 | sym.st_value = 0; | |
5645 | sym.st_size = h->size; | |
6ec3bb6a | 5646 | sym.st_other = 0; |
bf73e4f3 ILT |
5647 | if (h->root.type == bfd_link_hash_weak |
5648 | || (h->elf_link_hash_flags & ELF_LINK_HASH_DEFINED_WEAK) != 0) | |
5649 | sym.st_info = ELF_ST_INFO (STB_WEAK, h->type); | |
5650 | else | |
5651 | sym.st_info = ELF_ST_INFO (STB_GLOBAL, h->type); | |
6ec3bb6a ILT |
5652 | |
5653 | switch (h->root.type) | |
5654 | { | |
5655 | default: | |
5656 | case bfd_link_hash_new: | |
5657 | abort (); | |
5658 | return false; | |
5659 | ||
5660 | case bfd_link_hash_undefined: | |
71edd06d | 5661 | input_sec = bfd_und_section_ptr; |
6ec3bb6a ILT |
5662 | sym.st_shndx = SHN_UNDEF; |
5663 | break; | |
5664 | ||
5665 | case bfd_link_hash_weak: | |
71edd06d | 5666 | input_sec = bfd_und_section_ptr; |
6ec3bb6a | 5667 | sym.st_shndx = SHN_UNDEF; |
6ec3bb6a ILT |
5668 | break; |
5669 | ||
5670 | case bfd_link_hash_defined: | |
5671 | { | |
6ec3bb6a | 5672 | |
71edd06d ILT |
5673 | input_sec = h->root.u.def.section; |
5674 | if (input_sec->output_section != NULL) | |
6ec3bb6a | 5675 | { |
013dec1a | 5676 | sym.st_shndx = elf_section_from_bfd_section (finfo->output_bfd, |
71edd06d | 5677 | input_sec->output_section); |
013dec1a ILT |
5678 | if (sym.st_shndx == (unsigned short) -1) |
5679 | { | |
5680 | /* FIXME: No way to handle errors. */ | |
5681 | abort (); | |
5682 | } | |
6ec3bb6a | 5683 | |
013dec1a ILT |
5684 | /* ELF symbols in relocateable files are section relative, |
5685 | but in nonrelocateable files they are virtual | |
5686 | addresses. */ | |
71edd06d | 5687 | sym.st_value = h->root.u.def.value + input_sec->output_offset; |
013dec1a | 5688 | if (! finfo->info->relocateable) |
71edd06d | 5689 | sym.st_value += input_sec->output_section->vma; |
013dec1a ILT |
5690 | } |
5691 | else | |
5692 | { | |
71edd06d ILT |
5693 | BFD_ASSERT (bfd_get_flavour (input_sec->owner) |
5694 | == bfd_target_elf_flavour | |
5695 | && elf_elfheader (input_sec->owner)->e_type == ET_DYN); | |
013dec1a | 5696 | sym.st_shndx = SHN_UNDEF; |
71edd06d | 5697 | input_sec = bfd_und_section_ptr; |
013dec1a | 5698 | } |
6ec3bb6a ILT |
5699 | } |
5700 | break; | |
5701 | ||
5702 | case bfd_link_hash_common: | |
71edd06d | 5703 | input_sec = bfd_com_section_ptr; |
6ec3bb6a | 5704 | sym.st_shndx = SHN_COMMON; |
7c6da9ca | 5705 | sym.st_value = 1 << h->root.u.c.alignment_power; |
6ec3bb6a ILT |
5706 | break; |
5707 | ||
5708 | case bfd_link_hash_indirect: | |
5709 | case bfd_link_hash_warning: | |
5710 | /* I have no idea how these should be handled. */ | |
5711 | return true; | |
5712 | } | |
5713 | ||
013dec1a ILT |
5714 | /* If this symbol should be put in the .dynsym section, then put it |
5715 | there now. We have already know the symbol index. We also fill | |
5716 | in the entry in the .hash section. */ | |
5717 | if (h->dynindx != -1) | |
5718 | { | |
5719 | struct elf_backend_data *bed; | |
5720 | size_t bucketcount; | |
5721 | size_t bucket; | |
5722 | bfd_byte *bucketpos; | |
5723 | bfd_vma chain; | |
5724 | ||
5725 | sym.st_name = h->dynstr_index; | |
5726 | ||
5727 | /* Give the processor backend a chance to tweak the symbol | |
5728 | value, and also to finish up anything that needs to be done | |
5729 | for this symbol. */ | |
5730 | bed = get_elf_backend_data (finfo->output_bfd); | |
5731 | if (! ((*bed->elf_backend_finish_dynamic_symbol) | |
5732 | (finfo->output_bfd, finfo->info, h, &sym))) | |
5733 | { | |
5734 | /* FIXME: No way to return error. */ | |
5735 | abort (); | |
5736 | } | |
5737 | ||
5738 | elf_swap_symbol_out (finfo->output_bfd, &sym, | |
5739 | ((Elf_External_Sym *) finfo->dynsym_sec->contents | |
5740 | + h->dynindx)); | |
5741 | ||
5742 | bucketcount = elf_hash_table (finfo->info)->bucketcount; | |
5743 | bucket = bfd_elf_hash (h->root.root.string) % bucketcount; | |
5744 | bucketpos = ((bfd_byte *) finfo->hash_sec->contents | |
5745 | + (bucket + 2) * (ARCH_SIZE / 8)); | |
5746 | chain = get_word (finfo->output_bfd, bucketpos); | |
5747 | put_word (finfo->output_bfd, h->dynindx, bucketpos); | |
5748 | put_word (finfo->output_bfd, chain, | |
5749 | ((bfd_byte *) finfo->hash_sec->contents | |
5750 | + (bucketcount + 2 + h->dynindx) * (ARCH_SIZE / 8))); | |
5751 | } | |
5752 | ||
5753 | /* If we're stripping it, then it was just a dynamic symbol, and | |
5754 | there's nothing else to do. */ | |
5755 | if (strip) | |
5756 | return true; | |
5757 | ||
6ec3bb6a ILT |
5758 | h->indx = finfo->output_bfd->symcount; |
5759 | ||
71edd06d | 5760 | if (! elf_link_output_sym (finfo, h->root.root.string, &sym, input_sec)) |
6ec3bb6a ILT |
5761 | { |
5762 | /* FIXME: No way to return error. */ | |
5763 | abort (); | |
5764 | } | |
5765 | ||
5766 | return true; | |
5767 | } | |
5768 | ||
5769 | /* Link an input file into the linker output file. This function | |
5770 | handles all the sections and relocations of the input file at once. | |
5771 | This is so that we only have to read the local symbols once, and | |
5772 | don't have to keep them in memory. */ | |
5773 | ||
5774 | static boolean | |
5775 | elf_link_input_bfd (finfo, input_bfd) | |
5776 | struct elf_final_link_info *finfo; | |
5777 | bfd *input_bfd; | |
5778 | { | |
5779 | boolean (*relocate_section) PARAMS ((bfd *, struct bfd_link_info *, | |
5780 | bfd *, asection *, bfd_byte *, | |
5781 | Elf_Internal_Rela *, | |
5782 | Elf_Internal_Sym *, | |
71edd06d | 5783 | asection **, char *)); |
6ec3bb6a ILT |
5784 | bfd *output_bfd; |
5785 | Elf_Internal_Shdr *symtab_hdr; | |
5315c428 ILT |
5786 | size_t locsymcount; |
5787 | size_t extsymoff; | |
6ec3bb6a ILT |
5788 | Elf_External_Sym *esym; |
5789 | Elf_External_Sym *esymend; | |
5790 | Elf_Internal_Sym *isym; | |
5791 | long *pindex; | |
5792 | asection **ppsection; | |
5793 | asection *o; | |
5794 | ||
5795 | output_bfd = finfo->output_bfd; | |
5796 | relocate_section = | |
5797 | get_elf_backend_data (output_bfd)->elf_backend_relocate_section; | |
5798 | ||
013dec1a ILT |
5799 | /* If this is a dynamic object, we don't want to do anything here: |
5800 | we don't want the local symbols, and we don't want the section | |
5801 | contents. */ | |
5802 | if (elf_elfheader (input_bfd)->e_type == ET_DYN) | |
5803 | return true; | |
5804 | ||
6ec3bb6a | 5805 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
5315c428 ILT |
5806 | if (elf_bad_symtab (input_bfd)) |
5807 | { | |
5808 | locsymcount = symtab_hdr->sh_size / sizeof (Elf_External_Sym); | |
5809 | extsymoff = 0; | |
5810 | } | |
5811 | else | |
5812 | { | |
5813 | locsymcount = symtab_hdr->sh_info; | |
5814 | extsymoff = symtab_hdr->sh_info; | |
5815 | } | |
5816 | ||
5817 | /* Read the local symbols. */ | |
c46b8ed7 JL |
5818 | if (locsymcount > 0 |
5819 | && (bfd_seek (input_bfd, symtab_hdr->sh_offset, SEEK_SET) != 0 | |
5820 | || (bfd_read (finfo->external_syms, sizeof (Elf_External_Sym), | |
5821 | locsymcount, input_bfd) | |
5822 | != locsymcount * sizeof (Elf_External_Sym)))) | |
6ec3bb6a ILT |
5823 | return false; |
5824 | ||
5825 | /* Swap in the local symbols and write out the ones which we know | |
5826 | are going into the output file. */ | |
5827 | esym = finfo->external_syms; | |
5315c428 | 5828 | esymend = esym + locsymcount; |
6ec3bb6a ILT |
5829 | isym = finfo->internal_syms; |
5830 | pindex = finfo->indices; | |
5831 | ppsection = finfo->sections; | |
5832 | for (; esym < esymend; esym++, isym++, pindex++, ppsection++) | |
5833 | { | |
5834 | asection *isec; | |
5835 | const char *name; | |
5836 | bfd_vma oldval; | |
5837 | ||
5838 | elf_swap_symbol_in (input_bfd, esym, isym); | |
5839 | *pindex = -1; | |
5840 | ||
5315c428 ILT |
5841 | if (elf_bad_symtab (input_bfd)) |
5842 | { | |
5843 | if (ELF_ST_BIND (isym->st_info) != STB_LOCAL) | |
5844 | { | |
5845 | *ppsection = NULL; | |
5846 | continue; | |
5847 | } | |
5848 | } | |
5849 | ||
6ec3bb6a | 5850 | if (isym->st_shndx == SHN_UNDEF) |
badd23e3 | 5851 | isec = bfd_und_section_ptr; |
6ec3bb6a ILT |
5852 | else if (isym->st_shndx > 0 && isym->st_shndx < SHN_LORESERVE) |
5853 | { | |
5854 | isec = section_from_elf_index (input_bfd, isym->st_shndx); | |
5855 | if (isec == NULL) | |
5856 | return false; | |
5857 | } | |
5858 | else if (isym->st_shndx == SHN_ABS) | |
badd23e3 | 5859 | isec = bfd_abs_section_ptr; |
6ec3bb6a | 5860 | else if (isym->st_shndx == SHN_COMMON) |
badd23e3 | 5861 | isec = bfd_com_section_ptr; |
6ec3bb6a ILT |
5862 | else |
5863 | { | |
5864 | /* Who knows? */ | |
5865 | isec = NULL; | |
5866 | } | |
5867 | ||
5868 | *ppsection = isec; | |
5869 | ||
5870 | /* Don't output the first, undefined, symbol. */ | |
5871 | if (esym == finfo->external_syms) | |
5872 | continue; | |
5873 | ||
5874 | /* If we are stripping all symbols, we don't want to output this | |
5875 | one. */ | |
5876 | if (finfo->info->strip == strip_all) | |
5877 | continue; | |
5878 | ||
5879 | /* We never output section symbols. Instead, we use the section | |
5880 | symbol of the corresponding section in the output file. */ | |
5881 | if (ELF_ST_TYPE (isym->st_info) == STT_SECTION) | |
5882 | continue; | |
5883 | ||
5884 | /* If we are discarding all local symbols, we don't want to | |
5885 | output this one. If we are generating a relocateable output | |
5886 | file, then some of the local symbols may be required by | |
5887 | relocs; we output them below as we discover that they are | |
5888 | needed. */ | |
5889 | if (finfo->info->discard == discard_all) | |
5890 | continue; | |
5891 | ||
5892 | /* Get the name of the symbol. */ | |
5893 | name = elf_string_from_elf_section (input_bfd, symtab_hdr->sh_link, | |
5894 | isym->st_name); | |
5895 | if (name == NULL) | |
5896 | return false; | |
5897 | ||
5898 | /* See if we are discarding symbols with this name. */ | |
5899 | if ((finfo->info->strip == strip_some | |
5900 | && (bfd_hash_lookup (finfo->info->keep_hash, name, false, false) | |
5901 | == NULL)) | |
5902 | || (finfo->info->discard == discard_l | |
5903 | && strncmp (name, finfo->info->lprefix, | |
5904 | finfo->info->lprefix_len) == 0)) | |
5905 | continue; | |
5906 | ||
5907 | /* If we get here, we are going to output this symbol. */ | |
5908 | ||
5909 | /* Adjust the section index for the output file. */ | |
5910 | isym->st_shndx = elf_section_from_bfd_section (output_bfd, | |
5911 | isec->output_section); | |
013dec1a | 5912 | if (isym->st_shndx == (unsigned short) -1) |
6ec3bb6a ILT |
5913 | return false; |
5914 | ||
5915 | *pindex = output_bfd->symcount; | |
5916 | ||
5917 | /* ELF symbols in relocateable files are section relative, but | |
5918 | in executable files they are virtual addresses. Note that | |
5919 | this code assumes that all ELF sections have an associated | |
5920 | BFD section with a reasonable value for output_offset; below | |
5921 | we assume that they also have a reasonable value for | |
5922 | output_section. Any special sections must be set up to meet | |
5923 | these requirements. */ | |
5924 | oldval = isym->st_value; | |
5925 | isym->st_value += isec->output_offset; | |
5926 | if (! finfo->info->relocateable) | |
5927 | isym->st_value += isec->output_section->vma; | |
5928 | ||
71edd06d | 5929 | if (! elf_link_output_sym (finfo, name, isym, isec)) |
6ec3bb6a ILT |
5930 | return false; |
5931 | ||
5932 | /* Restore the old value for reloc handling. */ | |
5933 | isym->st_value = oldval; | |
5934 | } | |
5935 | ||
5936 | /* Relocate the contents of each section. */ | |
5937 | for (o = input_bfd->sections; o != NULL; o = o->next) | |
5938 | { | |
5939 | Elf_Internal_Shdr *input_rel_hdr; | |
5940 | ||
5941 | if ((o->flags & SEC_HAS_CONTENTS) == 0) | |
5942 | continue; | |
5943 | ||
8af74670 ILT |
5944 | if ((o->flags & SEC_IN_MEMORY) != 0 |
5945 | && input_bfd == elf_hash_table (finfo->info)->dynobj) | |
5946 | { | |
5947 | /* Section was created by elf_link_create_dynamic_sections. | |
5948 | FIXME: This test is fragile. */ | |
5949 | continue; | |
5950 | } | |
5951 | ||
6ec3bb6a ILT |
5952 | /* Read the contents of the section. */ |
5953 | if (! bfd_get_section_contents (input_bfd, o, finfo->contents, | |
5954 | (file_ptr) 0, o->_raw_size)) | |
5955 | return false; | |
5956 | ||
5957 | if ((o->flags & SEC_RELOC) != 0) | |
5958 | { | |
ea617174 ILT |
5959 | PTR external_relocs; |
5960 | ||
5961 | /* Get the external relocs. They may have been cached. */ | |
5962 | external_relocs = elf_section_data (o)->relocs; | |
5963 | if (external_relocs == NULL) | |
5964 | { | |
5965 | input_rel_hdr = &elf_section_data (o)->rel_hdr; | |
5966 | if ((bfd_seek (input_bfd, input_rel_hdr->sh_offset, SEEK_SET) | |
5967 | != 0) | |
5968 | || (bfd_read (finfo->external_relocs, 1, | |
5969 | input_rel_hdr->sh_size, input_bfd) | |
5970 | != input_rel_hdr->sh_size)) | |
5971 | return false; | |
5972 | external_relocs = finfo->external_relocs; | |
5973 | } | |
6ec3bb6a ILT |
5974 | |
5975 | /* Swap in the relocs. For convenience, we always produce | |
5976 | an Elf_Internal_Rela array; if the relocs are Rel, we set | |
5977 | the addend to 0. */ | |
5978 | if (input_rel_hdr->sh_entsize == sizeof (Elf_External_Rel)) | |
5979 | { | |
5980 | Elf_External_Rel *erel; | |
5981 | Elf_External_Rel *erelend; | |
5982 | Elf_Internal_Rela *irela; | |
5983 | ||
ea617174 | 5984 | erel = (Elf_External_Rel *) external_relocs; |
6ec3bb6a ILT |
5985 | erelend = erel + o->reloc_count; |
5986 | irela = finfo->internal_relocs; | |
5987 | for (; erel < erelend; erel++, irela++) | |
5988 | { | |
5989 | Elf_Internal_Rel irel; | |
5990 | ||
5991 | elf_swap_reloc_in (input_bfd, erel, &irel); | |
5992 | irela->r_offset = irel.r_offset; | |
5993 | irela->r_info = irel.r_info; | |
5994 | irela->r_addend = 0; | |
5995 | } | |
5996 | } | |
5997 | else | |
5998 | { | |
5999 | Elf_External_Rela *erela; | |
6000 | Elf_External_Rela *erelaend; | |
6001 | Elf_Internal_Rela *irela; | |
6002 | ||
6003 | BFD_ASSERT (input_rel_hdr->sh_entsize | |
6004 | == sizeof (Elf_External_Rela)); | |
6005 | ||
ea617174 | 6006 | erela = (Elf_External_Rela *) external_relocs; |
6ec3bb6a ILT |
6007 | erelaend = erela + o->reloc_count; |
6008 | irela = finfo->internal_relocs; | |
6009 | for (; erela < erelaend; erela++, irela++) | |
6010 | elf_swap_reloca_in (input_bfd, erela, irela); | |
6011 | } | |
6012 | ||
6013 | /* Relocate the section by invoking a back end routine. | |
6014 | ||
6015 | The back end routine is responsible for adjusting the | |
6016 | section contents as necessary, and (if using Rela relocs | |
6017 | and generating a relocateable output file) adjusting the | |
6018 | reloc addend as necessary. | |
6019 | ||
6020 | The back end routine does not have to worry about setting | |
6021 | the reloc address or the reloc symbol index. | |
6022 | ||
6023 | The back end routine is given a pointer to the swapped in | |
6024 | internal symbols, and can access the hash table entries | |
6025 | for the external symbols via elf_sym_hashes (input_bfd). | |
6026 | ||
6027 | When generating relocateable output, the back end routine | |
6028 | must handle STB_LOCAL/STT_SECTION symbols specially. The | |
6029 | output symbol is going to be a section symbol | |
6030 | corresponding to the output section, which will require | |
6031 | the addend to be adjusted. */ | |
6032 | ||
6033 | if (! (*relocate_section) (output_bfd, finfo->info, | |
6034 | input_bfd, o, | |
6035 | finfo->contents, | |
6036 | finfo->internal_relocs, | |
6037 | finfo->internal_syms, | |
71edd06d ILT |
6038 | finfo->sections, |
6039 | finfo->symstrtab->tab)) | |
6ec3bb6a ILT |
6040 | return false; |
6041 | ||
6042 | if (finfo->info->relocateable) | |
6043 | { | |
6044 | Elf_Internal_Rela *irela; | |
6045 | Elf_Internal_Rela *irelaend; | |
6046 | struct elf_link_hash_entry **rel_hash; | |
6047 | Elf_Internal_Shdr *output_rel_hdr; | |
6048 | ||
6049 | /* Adjust the reloc addresses and symbol indices. */ | |
6050 | ||
6051 | irela = finfo->internal_relocs; | |
6052 | irelaend = irela + o->reloc_count; | |
6053 | rel_hash = (elf_section_data (o->output_section)->rel_hashes | |
6054 | + o->output_section->reloc_count); | |
6055 | for (; irela < irelaend; irela++, rel_hash++) | |
6056 | { | |
6057 | long r_symndx; | |
6058 | Elf_Internal_Sym *isym; | |
6059 | asection *sec; | |
6060 | ||
6061 | irela->r_offset += o->output_offset; | |
6062 | ||
6063 | r_symndx = ELF_R_SYM (irela->r_info); | |
6064 | ||
6065 | if (r_symndx == 0) | |
6066 | continue; | |
6067 | ||
5315c428 ILT |
6068 | if (r_symndx >= locsymcount |
6069 | || (elf_bad_symtab (input_bfd) | |
6070 | && finfo->sections[r_symndx] == NULL)) | |
6ec3bb6a ILT |
6071 | { |
6072 | long indx; | |
6073 | ||
6074 | /* This is a reloc against a global symbol. We | |
6075 | have not yet output all the local symbols, so | |
6076 | we do not know the symbol index of any global | |
6077 | symbol. We set the rel_hash entry for this | |
6078 | reloc to point to the global hash table entry | |
6079 | for this symbol. The symbol index is then | |
6080 | set at the end of elf_bfd_final_link. */ | |
5315c428 | 6081 | indx = r_symndx - extsymoff; |
6ec3bb6a ILT |
6082 | *rel_hash = elf_sym_hashes (input_bfd)[indx]; |
6083 | ||
6084 | /* Setting the index to -2 tells | |
6085 | elf_link_output_extsym that this symbol is | |
6086 | used by a reloc. */ | |
6087 | BFD_ASSERT ((*rel_hash)->indx < 0); | |
6088 | (*rel_hash)->indx = -2; | |
6089 | ||
6090 | continue; | |
6091 | } | |
6092 | ||
6093 | /* This is a reloc against a local symbol. */ | |
6094 | ||
6095 | *rel_hash = NULL; | |
6096 | isym = finfo->internal_syms + r_symndx; | |
6097 | sec = finfo->sections[r_symndx]; | |
6098 | if (ELF_ST_TYPE (isym->st_info) == STT_SECTION) | |
6099 | { | |
6100 | /* I suppose the backend ought to fill in the | |
6101 | section of any STT_SECTION symbol against a | |
6102 | processor specific section. */ | |
badd23e3 ILT |
6103 | if (sec != NULL && bfd_is_abs_section (sec)) |
6104 | r_symndx = 0; | |
6105 | else if (sec == NULL || sec->owner == NULL) | |
6ec3bb6a ILT |
6106 | { |
6107 | bfd_set_error (bfd_error_bad_value); | |
6108 | return false; | |
6109 | } | |
6ec3bb6a | 6110 | else |
013dec1a ILT |
6111 | { |
6112 | r_symndx = sec->output_section->target_index; | |
6113 | if (r_symndx == 0) | |
6114 | abort (); | |
6115 | } | |
6ec3bb6a ILT |
6116 | } |
6117 | else | |
6118 | { | |
6119 | if (finfo->indices[r_symndx] == -1) | |
6120 | { | |
6121 | unsigned long link; | |
6122 | const char *name; | |
6123 | asection *osec; | |
6124 | ||
6125 | if (finfo->info->strip == strip_all) | |
6126 | { | |
6127 | /* You can't do ld -r -s. */ | |
6128 | bfd_set_error (bfd_error_invalid_operation); | |
6129 | return false; | |
6130 | } | |
6131 | ||
6132 | /* This symbol was skipped earlier, but | |
6133 | since it is needed by a reloc, we | |
6134 | must output it now. */ | |
6135 | link = symtab_hdr->sh_link; | |
6136 | name = elf_string_from_elf_section (input_bfd, | |
6137 | link, | |
6138 | isym->st_name); | |
6139 | if (name == NULL) | |
6140 | return false; | |
6141 | ||
6142 | osec = sec->output_section; | |
6143 | isym->st_shndx = | |
6144 | elf_section_from_bfd_section (output_bfd, | |
6145 | osec); | |
013dec1a | 6146 | if (isym->st_shndx == (unsigned short) -1) |
6ec3bb6a ILT |
6147 | return false; |
6148 | ||
6149 | isym->st_value += sec->output_offset; | |
6150 | if (! finfo->info->relocateable) | |
6151 | isym->st_value += osec->vma; | |
6152 | ||
6153 | finfo->indices[r_symndx] = output_bfd->symcount; | |
6154 | ||
71edd06d | 6155 | if (! elf_link_output_sym (finfo, name, isym, sec)) |
6ec3bb6a ILT |
6156 | return false; |
6157 | } | |
6158 | ||
6159 | r_symndx = finfo->indices[r_symndx]; | |
6160 | } | |
6161 | ||
6162 | irela->r_info = ELF_R_INFO (r_symndx, | |
6163 | ELF_R_TYPE (irela->r_info)); | |
6164 | } | |
6165 | ||
6166 | /* Swap out the relocs. */ | |
6167 | output_rel_hdr = &elf_section_data (o->output_section)->rel_hdr; | |
6168 | BFD_ASSERT (output_rel_hdr->sh_entsize | |
6169 | == input_rel_hdr->sh_entsize); | |
6170 | irela = finfo->internal_relocs; | |
6171 | irelaend = irela + o->reloc_count; | |
6172 | if (input_rel_hdr->sh_entsize == sizeof (Elf_External_Rel)) | |
6173 | { | |
6174 | Elf_External_Rel *erel; | |
6175 | ||
6176 | erel = ((Elf_External_Rel *) output_rel_hdr->contents | |
6177 | + o->output_section->reloc_count); | |
6178 | for (; irela < irelaend; irela++, erel++) | |
6179 | { | |
6180 | Elf_Internal_Rel irel; | |
6181 | ||
6182 | irel.r_offset = irela->r_offset; | |
6183 | irel.r_info = irela->r_info; | |
6184 | BFD_ASSERT (irela->r_addend == 0); | |
6185 | elf_swap_reloc_out (output_bfd, &irel, erel); | |
6186 | } | |
6187 | } | |
6188 | else | |
6189 | { | |
6190 | Elf_External_Rela *erela; | |
6191 | ||
6192 | BFD_ASSERT (input_rel_hdr->sh_entsize | |
6193 | == sizeof (Elf_External_Rela)); | |
6194 | erela = ((Elf_External_Rela *) output_rel_hdr->contents | |
6195 | + o->output_section->reloc_count); | |
6196 | for (; irela < irelaend; irela++, erela++) | |
6197 | elf_swap_reloca_out (output_bfd, irela, erela); | |
6198 | } | |
6199 | ||
6200 | o->output_section->reloc_count += o->reloc_count; | |
6201 | } | |
6202 | } | |
6203 | ||
6204 | /* Write out the modified section contents. */ | |
6205 | if (! bfd_set_section_contents (output_bfd, o->output_section, | |
6206 | finfo->contents, o->output_offset, | |
6207 | (o->_cooked_size != 0 | |
6208 | ? o->_cooked_size | |
6209 | : o->_raw_size))) | |
6210 | return false; | |
6211 | } | |
6212 | ||
6213 | return true; | |
6214 | } | |
6215 | ||
6216 | /* Generate a reloc when linking an ELF file. This is a reloc | |
6217 | requested by the linker, and does come from any input file. This | |
6218 | is used to build constructor and destructor tables when linking | |
6219 | with -Ur. */ | |
6220 | ||
6221 | static boolean | |
6222 | elf_reloc_link_order (output_bfd, info, output_section, link_order) | |
6223 | bfd *output_bfd; | |
6224 | struct bfd_link_info *info; | |
6225 | asection *output_section; | |
6226 | struct bfd_link_order *link_order; | |
6227 | { | |
6228 | const reloc_howto_type *howto; | |
6229 | long indx; | |
6230 | bfd_vma offset; | |
6231 | struct elf_link_hash_entry **rel_hash_ptr; | |
6232 | Elf_Internal_Shdr *rel_hdr; | |
6233 | ||
6234 | howto = bfd_reloc_type_lookup (output_bfd, link_order->u.reloc.p->reloc); | |
6235 | if (howto == NULL) | |
6236 | { | |
6237 | bfd_set_error (bfd_error_bad_value); | |
6238 | return false; | |
6239 | } | |
6240 | ||
6241 | /* If this is an inplace reloc, we must write the addend into the | |
6242 | object file. */ | |
6243 | if (howto->partial_inplace | |
6244 | && link_order->u.reloc.p->addend != 0) | |
6245 | { | |
6246 | bfd_size_type size; | |
6247 | bfd_reloc_status_type rstat; | |
6248 | bfd_byte *buf; | |
6249 | boolean ok; | |
6250 | ||
6251 | size = bfd_get_reloc_size (howto); | |
6252 | buf = (bfd_byte *) bfd_zmalloc (size); | |
6253 | if (buf == (bfd_byte *) NULL) | |
6254 | { | |
6255 | bfd_set_error (bfd_error_no_memory); | |
6256 | return false; | |
6257 | } | |
6258 | rstat = _bfd_relocate_contents (howto, output_bfd, | |
6259 | link_order->u.reloc.p->addend, buf); | |
6260 | switch (rstat) | |
6261 | { | |
6262 | case bfd_reloc_ok: | |
6263 | break; | |
6264 | default: | |
6265 | case bfd_reloc_outofrange: | |
6266 | abort (); | |
6267 | case bfd_reloc_overflow: | |
6268 | if (! ((*info->callbacks->reloc_overflow) | |
6269 | (info, | |
6270 | (link_order->type == bfd_section_reloc_link_order | |
6271 | ? bfd_section_name (output_bfd, | |
6272 | link_order->u.reloc.p->u.section) | |
6273 | : link_order->u.reloc.p->u.name), | |
6274 | howto->name, link_order->u.reloc.p->addend, | |
6275 | (bfd *) NULL, (asection *) NULL, (bfd_vma) 0))) | |
6276 | { | |
6277 | free (buf); | |
6278 | return false; | |
6279 | } | |
6280 | break; | |
6281 | } | |
6282 | ok = bfd_set_section_contents (output_bfd, output_section, (PTR) buf, | |
6283 | (file_ptr) link_order->offset, size); | |
6284 | free (buf); | |
6285 | if (! ok) | |
6286 | return false; | |
6287 | } | |
6288 | ||
6289 | /* Figure out the symbol index. */ | |
6290 | rel_hash_ptr = (elf_section_data (output_section)->rel_hashes | |
6291 | + output_section->reloc_count); | |
6292 | if (link_order->type == bfd_section_reloc_link_order) | |
6293 | { | |
013dec1a ILT |
6294 | indx = link_order->u.reloc.p->u.section->target_index; |
6295 | if (indx == 0) | |
6296 | abort (); | |
6ec3bb6a ILT |
6297 | *rel_hash_ptr = NULL; |
6298 | } | |
6299 | else | |
6300 | { | |
6301 | struct elf_link_hash_entry *h; | |
6302 | ||
6303 | h = elf_link_hash_lookup (elf_hash_table (info), | |
6304 | link_order->u.reloc.p->u.name, | |
6305 | false, false, true); | |
6306 | if (h != NULL) | |
6307 | { | |
6308 | /* Setting the index to -2 tells elf_link_output_extsym that | |
6309 | this symbol is used by a reloc. */ | |
6310 | h->indx = -2; | |
6311 | *rel_hash_ptr = h; | |
6312 | indx = 0; | |
6313 | } | |
6314 | else | |
6315 | { | |
6316 | if (! ((*info->callbacks->unattached_reloc) | |
6317 | (info, link_order->u.reloc.p->u.name, (bfd *) NULL, | |
6318 | (asection *) NULL, (bfd_vma) 0))) | |
6319 | return false; | |
6320 | indx = 0; | |
6321 | } | |
6322 | } | |
6323 | ||
6324 | /* The address of a reloc is relative to the section in a | |
6325 | relocateable file, and is a virtual address in an executable | |
6326 | file. */ | |
6327 | offset = link_order->offset; | |
6328 | if (! info->relocateable) | |
6329 | offset += output_section->vma; | |
6330 | ||
6331 | rel_hdr = &elf_section_data (output_section)->rel_hdr; | |
6332 | ||
6333 | if (rel_hdr->sh_type == SHT_REL) | |
6334 | { | |
6335 | Elf_Internal_Rel irel; | |
6336 | Elf_External_Rel *erel; | |
6337 | ||
6338 | irel.r_offset = offset; | |
6339 | irel.r_info = ELF_R_INFO (indx, howto->type); | |
6340 | erel = ((Elf_External_Rel *) rel_hdr->contents | |
6341 | + output_section->reloc_count); | |
6342 | elf_swap_reloc_out (output_bfd, &irel, erel); | |
6343 | } | |
6344 | else | |
6345 | { | |
6346 | Elf_Internal_Rela irela; | |
6347 | Elf_External_Rela *erela; | |
6348 | ||
6349 | irela.r_offset = offset; | |
6350 | irela.r_info = ELF_R_INFO (indx, howto->type); | |
6351 | irela.r_addend = link_order->u.reloc.p->addend; | |
6352 | erela = ((Elf_External_Rela *) rel_hdr->contents | |
6353 | + output_section->reloc_count); | |
6354 | elf_swap_reloca_out (output_bfd, &irela, erela); | |
6355 | } | |
6356 | ||
6357 | ++output_section->reloc_count; | |
6358 | ||
6359 | return true; | |
6360 | } |