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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 | |
244ffee7 | 148 | static int elf_symbol_from_bfd_symbol PARAMS ((bfd *, |
1c6042ee | 149 | struct symbol_cache_entry **)); |
244ffee7 | 150 | |
6ec3bb6a ILT |
151 | static boolean elf_compute_section_file_positions |
152 | PARAMS ((bfd *, struct bfd_link_info *)); | |
153 | static boolean prep_headers PARAMS ((bfd *)); | |
fa15568a | 154 | static void elf_fake_sections PARAMS ((bfd *, asection *, PTR)); |
6ec3bb6a | 155 | static boolean assign_section_numbers PARAMS ((bfd *)); |
013dec1a ILT |
156 | static file_ptr align_file_position PARAMS ((file_ptr)); |
157 | static file_ptr assign_file_position_for_section | |
158 | PARAMS ((Elf_Internal_Shdr *, file_ptr, boolean)); | |
6ec3bb6a | 159 | static boolean assign_file_positions_except_relocs PARAMS ((bfd *, boolean)); |
013dec1a ILT |
160 | static void assign_file_positions_for_relocs PARAMS ((bfd *)); |
161 | static bfd_size_type get_program_header_size PARAMS ((bfd *)); | |
162 | static file_ptr map_program_segments | |
163 | PARAMS ((bfd *, file_ptr, Elf_Internal_Shdr *, bfd_size_type)); | |
6ec3bb6a | 164 | |
9783e04a | 165 | static boolean elf_map_symbols PARAMS ((bfd *)); |
b9d5cdf0 | 166 | static boolean swap_out_syms PARAMS ((bfd *)); |
244ffee7 | 167 | |
2e03ce18 ILT |
168 | static boolean bfd_section_from_shdr PARAMS ((bfd *, unsigned int shindex)); |
169 | ||
6a3eb9b6 KR |
170 | #ifdef DEBUG |
171 | static void elf_debug_section PARAMS ((char *, int, Elf_Internal_Shdr *)); | |
172 | static void elf_debug_file PARAMS ((Elf_Internal_Ehdr *)); | |
173 | #endif | |
238ac6ec | 174 | |
32090b8e KR |
175 | #define elf_string_from_elf_strtab(abfd,strindex) \ |
176 | elf_string_from_elf_section(abfd,elf_elfheader(abfd)->e_shstrndx,strindex) | |
32090b8e | 177 | \f |
1c6042ee | 178 | |
32090b8e KR |
179 | /* Structure swapping routines */ |
180 | ||
6a3eb9b6 KR |
181 | /* Should perhaps use put_offset, put_word, etc. For now, the two versions |
182 | can be handled by explicitly specifying 32 bits or "the long type". */ | |
238ac6ec KR |
183 | #if ARCH_SIZE == 64 |
184 | #define put_word bfd_h_put_64 | |
185 | #define get_word bfd_h_get_64 | |
186 | #endif | |
187 | #if ARCH_SIZE == 32 | |
188 | #define put_word bfd_h_put_32 | |
189 | #define get_word bfd_h_get_32 | |
190 | #endif | |
191 | ||
244ffee7 JK |
192 | /* Translate an ELF symbol in external format into an ELF symbol in internal |
193 | format. */ | |
194 | ||
71edd06d | 195 | void |
1c6042ee ILT |
196 | elf_swap_symbol_in (abfd, src, dst) |
197 | bfd *abfd; | |
198 | Elf_External_Sym *src; | |
199 | Elf_Internal_Sym *dst; | |
244ffee7 JK |
200 | { |
201 | dst->st_name = bfd_h_get_32 (abfd, (bfd_byte *) src->st_name); | |
238ac6ec KR |
202 | dst->st_value = get_word (abfd, (bfd_byte *) src->st_value); |
203 | dst->st_size = get_word (abfd, (bfd_byte *) src->st_size); | |
244ffee7 JK |
204 | dst->st_info = bfd_h_get_8 (abfd, (bfd_byte *) src->st_info); |
205 | dst->st_other = bfd_h_get_8 (abfd, (bfd_byte *) src->st_other); | |
206 | dst->st_shndx = bfd_h_get_16 (abfd, (bfd_byte *) src->st_shndx); | |
207 | } | |
208 | ||
209 | /* Translate an ELF symbol in internal format into an ELF symbol in external | |
210 | format. */ | |
211 | ||
71edd06d | 212 | void |
1c6042ee ILT |
213 | elf_swap_symbol_out (abfd, src, dst) |
214 | bfd *abfd; | |
215 | Elf_Internal_Sym *src; | |
216 | Elf_External_Sym *dst; | |
244ffee7 JK |
217 | { |
218 | bfd_h_put_32 (abfd, src->st_name, dst->st_name); | |
238ac6ec KR |
219 | put_word (abfd, src->st_value, dst->st_value); |
220 | put_word (abfd, src->st_size, dst->st_size); | |
244ffee7 JK |
221 | bfd_h_put_8 (abfd, src->st_info, dst->st_info); |
222 | bfd_h_put_8 (abfd, src->st_other, dst->st_other); | |
223 | bfd_h_put_16 (abfd, src->st_shndx, dst->st_shndx); | |
224 | } | |
225 | ||
226 | ||
227 | /* Translate an ELF file header in external format into an ELF file header in | |
228 | internal format. */ | |
229 | ||
230 | static void | |
1c6042ee ILT |
231 | elf_swap_ehdr_in (abfd, src, dst) |
232 | bfd *abfd; | |
233 | Elf_External_Ehdr *src; | |
234 | Elf_Internal_Ehdr *dst; | |
244ffee7 JK |
235 | { |
236 | memcpy (dst->e_ident, src->e_ident, EI_NIDENT); | |
237 | dst->e_type = bfd_h_get_16 (abfd, (bfd_byte *) src->e_type); | |
238 | dst->e_machine = bfd_h_get_16 (abfd, (bfd_byte *) src->e_machine); | |
239 | dst->e_version = bfd_h_get_32 (abfd, (bfd_byte *) src->e_version); | |
238ac6ec KR |
240 | dst->e_entry = get_word (abfd, (bfd_byte *) src->e_entry); |
241 | dst->e_phoff = get_word (abfd, (bfd_byte *) src->e_phoff); | |
242 | dst->e_shoff = get_word (abfd, (bfd_byte *) src->e_shoff); | |
244ffee7 JK |
243 | dst->e_flags = bfd_h_get_32 (abfd, (bfd_byte *) src->e_flags); |
244 | dst->e_ehsize = bfd_h_get_16 (abfd, (bfd_byte *) src->e_ehsize); | |
245 | dst->e_phentsize = bfd_h_get_16 (abfd, (bfd_byte *) src->e_phentsize); | |
246 | dst->e_phnum = bfd_h_get_16 (abfd, (bfd_byte *) src->e_phnum); | |
247 | dst->e_shentsize = bfd_h_get_16 (abfd, (bfd_byte *) src->e_shentsize); | |
248 | dst->e_shnum = bfd_h_get_16 (abfd, (bfd_byte *) src->e_shnum); | |
249 | dst->e_shstrndx = bfd_h_get_16 (abfd, (bfd_byte *) src->e_shstrndx); | |
250 | } | |
251 | ||
252 | /* Translate an ELF file header in internal format into an ELF file header in | |
253 | external format. */ | |
254 | ||
255 | static void | |
1c6042ee ILT |
256 | elf_swap_ehdr_out (abfd, src, dst) |
257 | bfd *abfd; | |
258 | Elf_Internal_Ehdr *src; | |
259 | Elf_External_Ehdr *dst; | |
244ffee7 JK |
260 | { |
261 | memcpy (dst->e_ident, src->e_ident, EI_NIDENT); | |
262 | /* note that all elements of dst are *arrays of unsigned char* already... */ | |
263 | bfd_h_put_16 (abfd, src->e_type, dst->e_type); | |
264 | bfd_h_put_16 (abfd, src->e_machine, dst->e_machine); | |
265 | bfd_h_put_32 (abfd, src->e_version, dst->e_version); | |
238ac6ec KR |
266 | put_word (abfd, src->e_entry, dst->e_entry); |
267 | put_word (abfd, src->e_phoff, dst->e_phoff); | |
268 | put_word (abfd, src->e_shoff, dst->e_shoff); | |
244ffee7 JK |
269 | bfd_h_put_32 (abfd, src->e_flags, dst->e_flags); |
270 | bfd_h_put_16 (abfd, src->e_ehsize, dst->e_ehsize); | |
271 | bfd_h_put_16 (abfd, src->e_phentsize, dst->e_phentsize); | |
272 | bfd_h_put_16 (abfd, src->e_phnum, dst->e_phnum); | |
273 | bfd_h_put_16 (abfd, src->e_shentsize, dst->e_shentsize); | |
274 | bfd_h_put_16 (abfd, src->e_shnum, dst->e_shnum); | |
275 | bfd_h_put_16 (abfd, src->e_shstrndx, dst->e_shstrndx); | |
276 | } | |
277 | ||
278 | ||
279 | /* Translate an ELF section header table entry in external format into an | |
280 | ELF section header table entry in internal format. */ | |
281 | ||
282 | static void | |
1c6042ee ILT |
283 | elf_swap_shdr_in (abfd, src, dst) |
284 | bfd *abfd; | |
285 | Elf_External_Shdr *src; | |
286 | Elf_Internal_Shdr *dst; | |
244ffee7 JK |
287 | { |
288 | dst->sh_name = bfd_h_get_32 (abfd, (bfd_byte *) src->sh_name); | |
289 | dst->sh_type = bfd_h_get_32 (abfd, (bfd_byte *) src->sh_type); | |
238ac6ec KR |
290 | dst->sh_flags = get_word (abfd, (bfd_byte *) src->sh_flags); |
291 | dst->sh_addr = get_word (abfd, (bfd_byte *) src->sh_addr); | |
292 | dst->sh_offset = get_word (abfd, (bfd_byte *) src->sh_offset); | |
293 | dst->sh_size = get_word (abfd, (bfd_byte *) src->sh_size); | |
244ffee7 JK |
294 | dst->sh_link = bfd_h_get_32 (abfd, (bfd_byte *) src->sh_link); |
295 | dst->sh_info = bfd_h_get_32 (abfd, (bfd_byte *) src->sh_info); | |
238ac6ec KR |
296 | dst->sh_addralign = get_word (abfd, (bfd_byte *) src->sh_addralign); |
297 | dst->sh_entsize = get_word (abfd, (bfd_byte *) src->sh_entsize); | |
244ffee7 JK |
298 | /* we haven't done any processing on it yet, so... */ |
299 | dst->rawdata = (void *) 0; | |
300 | } | |
301 | ||
302 | /* Translate an ELF section header table entry in internal format into an | |
303 | ELF section header table entry in external format. */ | |
304 | ||
305 | static void | |
1c6042ee ILT |
306 | elf_swap_shdr_out (abfd, src, dst) |
307 | bfd *abfd; | |
308 | Elf_Internal_Shdr *src; | |
309 | Elf_External_Shdr *dst; | |
244ffee7 JK |
310 | { |
311 | /* note that all elements of dst are *arrays of unsigned char* already... */ | |
312 | bfd_h_put_32 (abfd, src->sh_name, dst->sh_name); | |
313 | bfd_h_put_32 (abfd, src->sh_type, dst->sh_type); | |
238ac6ec KR |
314 | put_word (abfd, src->sh_flags, dst->sh_flags); |
315 | put_word (abfd, src->sh_addr, dst->sh_addr); | |
316 | put_word (abfd, src->sh_offset, dst->sh_offset); | |
317 | put_word (abfd, src->sh_size, dst->sh_size); | |
244ffee7 JK |
318 | bfd_h_put_32 (abfd, src->sh_link, dst->sh_link); |
319 | bfd_h_put_32 (abfd, src->sh_info, dst->sh_info); | |
238ac6ec KR |
320 | put_word (abfd, src->sh_addralign, dst->sh_addralign); |
321 | put_word (abfd, src->sh_entsize, dst->sh_entsize); | |
244ffee7 JK |
322 | } |
323 | ||
324 | ||
325 | /* Translate an ELF program header table entry in external format into an | |
326 | ELF program header table entry in internal format. */ | |
327 | ||
328 | static void | |
1c6042ee ILT |
329 | elf_swap_phdr_in (abfd, src, dst) |
330 | bfd *abfd; | |
331 | Elf_External_Phdr *src; | |
332 | Elf_Internal_Phdr *dst; | |
244ffee7 JK |
333 | { |
334 | dst->p_type = bfd_h_get_32 (abfd, (bfd_byte *) src->p_type); | |
244ffee7 | 335 | dst->p_flags = bfd_h_get_32 (abfd, (bfd_byte *) src->p_flags); |
238ac6ec KR |
336 | dst->p_offset = get_word (abfd, (bfd_byte *) src->p_offset); |
337 | dst->p_vaddr = get_word (abfd, (bfd_byte *) src->p_vaddr); | |
338 | dst->p_paddr = get_word (abfd, (bfd_byte *) src->p_paddr); | |
339 | dst->p_filesz = get_word (abfd, (bfd_byte *) src->p_filesz); | |
340 | dst->p_memsz = get_word (abfd, (bfd_byte *) src->p_memsz); | |
341 | dst->p_align = get_word (abfd, (bfd_byte *) src->p_align); | |
244ffee7 JK |
342 | } |
343 | ||
244ffee7 | 344 | static void |
1c6042ee ILT |
345 | elf_swap_phdr_out (abfd, src, dst) |
346 | bfd *abfd; | |
347 | Elf_Internal_Phdr *src; | |
348 | Elf_External_Phdr *dst; | |
244ffee7 JK |
349 | { |
350 | /* note that all elements of dst are *arrays of unsigned char* already... */ | |
351 | bfd_h_put_32 (abfd, src->p_type, dst->p_type); | |
94dbb655 KR |
352 | put_word (abfd, src->p_offset, dst->p_offset); |
353 | put_word (abfd, src->p_vaddr, dst->p_vaddr); | |
354 | put_word (abfd, src->p_paddr, dst->p_paddr); | |
355 | put_word (abfd, src->p_filesz, dst->p_filesz); | |
356 | put_word (abfd, src->p_memsz, dst->p_memsz); | |
244ffee7 | 357 | bfd_h_put_32 (abfd, src->p_flags, dst->p_flags); |
94dbb655 | 358 | put_word (abfd, src->p_align, dst->p_align); |
244ffee7 JK |
359 | } |
360 | ||
361 | /* Translate an ELF reloc from external format to internal format. */ | |
013dec1a | 362 | INLINE void |
1c6042ee ILT |
363 | elf_swap_reloc_in (abfd, src, dst) |
364 | bfd *abfd; | |
365 | Elf_External_Rel *src; | |
366 | Elf_Internal_Rel *dst; | |
244ffee7 | 367 | { |
94dbb655 KR |
368 | dst->r_offset = get_word (abfd, (bfd_byte *) src->r_offset); |
369 | dst->r_info = get_word (abfd, (bfd_byte *) src->r_info); | |
244ffee7 JK |
370 | } |
371 | ||
013dec1a | 372 | INLINE void |
1c6042ee ILT |
373 | elf_swap_reloca_in (abfd, src, dst) |
374 | bfd *abfd; | |
375 | Elf_External_Rela *src; | |
376 | Elf_Internal_Rela *dst; | |
244ffee7 | 377 | { |
94dbb655 KR |
378 | dst->r_offset = get_word (abfd, (bfd_byte *) src->r_offset); |
379 | dst->r_info = get_word (abfd, (bfd_byte *) src->r_info); | |
380 | dst->r_addend = get_word (abfd, (bfd_byte *) src->r_addend); | |
244ffee7 JK |
381 | } |
382 | ||
383 | /* Translate an ELF reloc from internal format to external format. */ | |
013dec1a | 384 | INLINE void |
1c6042ee ILT |
385 | elf_swap_reloc_out (abfd, src, dst) |
386 | bfd *abfd; | |
387 | Elf_Internal_Rel *src; | |
388 | Elf_External_Rel *dst; | |
244ffee7 | 389 | { |
94dbb655 KR |
390 | put_word (abfd, src->r_offset, dst->r_offset); |
391 | put_word (abfd, src->r_info, dst->r_info); | |
244ffee7 JK |
392 | } |
393 | ||
013dec1a | 394 | INLINE void |
1c6042ee ILT |
395 | elf_swap_reloca_out (abfd, src, dst) |
396 | bfd *abfd; | |
397 | Elf_Internal_Rela *src; | |
398 | Elf_External_Rela *dst; | |
244ffee7 | 399 | { |
94dbb655 KR |
400 | put_word (abfd, src->r_offset, dst->r_offset); |
401 | put_word (abfd, src->r_info, dst->r_info); | |
402 | put_word (abfd, src->r_addend, dst->r_addend); | |
244ffee7 | 403 | } |
32090b8e | 404 | |
013dec1a ILT |
405 | INLINE void |
406 | elf_swap_dyn_in (abfd, src, dst) | |
407 | bfd *abfd; | |
408 | const Elf_External_Dyn *src; | |
409 | Elf_Internal_Dyn *dst; | |
410 | { | |
411 | dst->d_tag = get_word (abfd, src->d_tag); | |
412 | dst->d_un.d_val = get_word (abfd, src->d_un.d_val); | |
413 | } | |
1c6042ee | 414 | |
013dec1a ILT |
415 | INLINE void |
416 | elf_swap_dyn_out (abfd, src, dst) | |
417 | bfd *abfd; | |
418 | const Elf_Internal_Dyn *src; | |
419 | Elf_External_Dyn *dst; | |
420 | { | |
421 | put_word (abfd, src->d_tag, dst->d_tag); | |
422 | put_word (abfd, src->d_un.d_val, dst->d_un.d_val); | |
423 | } | |
424 | \f | |
32090b8e KR |
425 | /* String table creation/manipulation routines */ |
426 | ||
427 | static struct strtab * | |
1c6042ee ILT |
428 | bfd_new_strtab (abfd) |
429 | bfd *abfd; | |
32090b8e KR |
430 | { |
431 | struct strtab *ss; | |
432 | ||
b9d5cdf0 DM |
433 | ss = (struct strtab *) malloc (sizeof (struct strtab)); |
434 | if (!ss) | |
435 | { | |
d1ad85a6 | 436 | bfd_set_error (bfd_error_no_memory); |
b9d5cdf0 DM |
437 | return NULL; |
438 | } | |
439 | ss->tab = malloc (1); | |
440 | if (!ss->tab) | |
441 | { | |
d1ad85a6 | 442 | bfd_set_error (bfd_error_no_memory); |
b9d5cdf0 DM |
443 | return NULL; |
444 | } | |
32090b8e KR |
445 | *ss->tab = 0; |
446 | ss->nentries = 0; | |
447 | ss->length = 1; | |
244ffee7 | 448 | |
32090b8e KR |
449 | return ss; |
450 | } | |
451 | ||
6ec3bb6a | 452 | static unsigned long |
1c6042ee ILT |
453 | bfd_add_to_strtab (abfd, ss, str) |
454 | bfd *abfd; | |
455 | struct strtab *ss; | |
6ec3bb6a | 456 | const char *str; |
32090b8e KR |
457 | { |
458 | /* should search first, but for now: */ | |
459 | /* include the trailing NUL */ | |
460 | int ln = strlen (str) + 1; | |
461 | ||
6ec3bb6a ILT |
462 | /* FIXME: This is slow. Also, we could combine this with the a.out |
463 | string table building and use a hash table, although it might not | |
464 | be worth it since ELF symbols don't include debugging information | |
465 | and thus have much less overlap. */ | |
32090b8e | 466 | ss->tab = realloc (ss->tab, ss->length + ln); |
6ec3bb6a ILT |
467 | if (ss->tab == NULL) |
468 | { | |
469 | bfd_set_error (bfd_error_no_memory); | |
470 | return (unsigned long) -1; | |
471 | } | |
32090b8e | 472 | |
32090b8e KR |
473 | strcpy (ss->tab + ss->length, str); |
474 | ss->nentries++; | |
475 | ss->length += ln; | |
476 | ||
477 | return ss->length - ln; | |
478 | } | |
479 | ||
480 | static int | |
1c6042ee ILT |
481 | bfd_add_2_to_strtab (abfd, ss, str, str2) |
482 | bfd *abfd; | |
483 | struct strtab *ss; | |
484 | char *str; | |
485 | CONST char *str2; | |
244ffee7 | 486 | { |
32090b8e KR |
487 | /* should search first, but for now: */ |
488 | /* include the trailing NUL */ | |
489 | int ln = strlen (str) + strlen (str2) + 1; | |
490 | ||
491 | /* should this be using obstacks? */ | |
492 | if (ss->length) | |
493 | ss->tab = realloc (ss->tab, ss->length + ln); | |
494 | else | |
b9d5cdf0 | 495 | ss->tab = malloc (ln); |
32090b8e | 496 | |
9783e04a | 497 | BFD_ASSERT (ss->tab != 0); /* FIXME */ |
32090b8e KR |
498 | strcpy (ss->tab + ss->length, str); |
499 | strcpy (ss->tab + ss->length + strlen (str), str2); | |
500 | ss->nentries++; | |
501 | ss->length += ln; | |
502 | ||
503 | return ss->length - ln; | |
244ffee7 | 504 | } |
32090b8e KR |
505 | \f |
506 | /* ELF .o/exec file reading */ | |
507 | ||
508 | /* Create a new bfd section from an ELF section header. */ | |
509 | ||
244ffee7 | 510 | static boolean |
1c6042ee ILT |
511 | bfd_section_from_shdr (abfd, shindex) |
512 | bfd *abfd; | |
513 | unsigned int shindex; | |
244ffee7 | 514 | { |
32090b8e KR |
515 | Elf_Internal_Shdr *hdr = elf_elfsections (abfd)[shindex]; |
516 | Elf_Internal_Ehdr *ehdr = elf_elfheader (abfd); | |
244ffee7 JK |
517 | char *name; |
518 | ||
519 | name = elf_string_from_elf_strtab (abfd, hdr->sh_name); | |
520 | ||
521 | switch (hdr->sh_type) | |
522 | { | |
244ffee7 | 523 | case SHT_NULL: |
497c5434 | 524 | /* Inactive section. Throw it away. */ |
244ffee7 JK |
525 | return true; |
526 | ||
497c5434 ILT |
527 | case SHT_PROGBITS: /* Normal section with contents. */ |
528 | case SHT_DYNAMIC: /* Dynamic linking information. */ | |
529 | case SHT_NOBITS: /* .bss section. */ | |
fa15568a | 530 | case SHT_HASH: /* .hash section. */ |
497c5434 | 531 | return _bfd_elf_make_section_from_shdr (abfd, hdr, name); |
244ffee7 JK |
532 | |
533 | case SHT_SYMTAB: /* A symbol table */ | |
32090b8e KR |
534 | if (elf_onesymtab (abfd) == shindex) |
535 | return true; | |
536 | ||
244ffee7 | 537 | BFD_ASSERT (hdr->sh_entsize == sizeof (Elf_External_Sym)); |
32090b8e | 538 | BFD_ASSERT (elf_onesymtab (abfd) == 0); |
244ffee7 | 539 | elf_onesymtab (abfd) = shindex; |
1c6042ee ILT |
540 | elf_tdata (abfd)->symtab_hdr = *hdr; |
541 | elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->symtab_hdr; | |
244ffee7 JK |
542 | abfd->flags |= HAS_SYMS; |
543 | return true; | |
544 | ||
cb71adf1 PS |
545 | case SHT_DYNSYM: /* A dynamic symbol table */ |
546 | if (elf_dynsymtab (abfd) == shindex) | |
547 | return true; | |
548 | ||
549 | BFD_ASSERT (hdr->sh_entsize == sizeof (Elf_External_Sym)); | |
550 | BFD_ASSERT (elf_dynsymtab (abfd) == 0); | |
551 | elf_dynsymtab (abfd) = shindex; | |
552 | elf_tdata (abfd)->dynsymtab_hdr = *hdr; | |
553 | elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->dynsymtab_hdr; | |
554 | abfd->flags |= HAS_SYMS; | |
fa15568a ILT |
555 | |
556 | /* Besides being a symbol table, we also treat this as a regular | |
557 | section, so that objcopy can handle it. */ | |
558 | return _bfd_elf_make_section_from_shdr (abfd, hdr, name); | |
cb71adf1 | 559 | |
244ffee7 | 560 | case SHT_STRTAB: /* A string table */ |
497c5434 | 561 | if (hdr->rawdata != NULL) |
fce36137 | 562 | return true; |
32090b8e KR |
563 | if (ehdr->e_shstrndx == shindex) |
564 | { | |
1c6042ee ILT |
565 | elf_tdata (abfd)->shstrtab_hdr = *hdr; |
566 | elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->shstrtab_hdr; | |
567 | hdr->rawdata = (PTR) & elf_tdata (abfd)->shstrtab_hdr; | |
32090b8e KR |
568 | return true; |
569 | } | |
570 | { | |
68241b2b | 571 | unsigned int i; |
fce36137 | 572 | |
32090b8e KR |
573 | for (i = 1; i < ehdr->e_shnum; i++) |
574 | { | |
1c6042ee | 575 | Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i]; |
32090b8e KR |
576 | if (hdr2->sh_link == shindex) |
577 | { | |
2e03ce18 ILT |
578 | if (! bfd_section_from_shdr (abfd, i)) |
579 | return false; | |
32090b8e KR |
580 | if (elf_onesymtab (abfd) == i) |
581 | { | |
1c6042ee | 582 | elf_tdata (abfd)->strtab_hdr = *hdr; |
fa15568a ILT |
583 | elf_elfsections (abfd)[shindex] = |
584 | &elf_tdata (abfd)->strtab_hdr; | |
32090b8e KR |
585 | return true; |
586 | } | |
cb71adf1 PS |
587 | if (elf_dynsymtab (abfd) == i) |
588 | { | |
589 | elf_tdata (abfd)->dynstrtab_hdr = *hdr; | |
fa15568a ILT |
590 | elf_elfsections (abfd)[shindex] = |
591 | &elf_tdata (abfd)->dynstrtab_hdr; | |
592 | /* We also treat this as a regular section, so | |
593 | that objcopy can handle it. */ | |
594 | break; | |
cb71adf1 | 595 | } |
2e03ce18 | 596 | #if 0 /* Not handling other string tables specially right now. */ |
1c6042ee | 597 | hdr2 = elf_elfsections (abfd)[i]; /* in case it moved */ |
32090b8e KR |
598 | /* We have a strtab for some random other section. */ |
599 | newsect = (asection *) hdr2->rawdata; | |
600 | if (!newsect) | |
601 | break; | |
602 | hdr->rawdata = (PTR) newsect; | |
603 | hdr2 = &elf_section_data (newsect)->str_hdr; | |
604 | *hdr2 = *hdr; | |
1c6042ee | 605 | elf_elfsections (abfd)[shindex] = hdr2; |
32090b8e KR |
606 | #endif |
607 | } | |
608 | } | |
609 | } | |
610 | ||
497c5434 | 611 | return _bfd_elf_make_section_from_shdr (abfd, hdr, name); |
244ffee7 JK |
612 | |
613 | case SHT_REL: | |
614 | case SHT_RELA: | |
497c5434 | 615 | /* *These* do a lot of work -- but build no sections! */ |
244ffee7 JK |
616 | { |
617 | asection *target_sect; | |
32090b8e | 618 | Elf_Internal_Shdr *hdr2; |
244ffee7 JK |
619 | int use_rela_p = get_elf_backend_data (abfd)->use_rela_p; |
620 | ||
497c5434 ILT |
621 | /* Get the symbol table. */ |
622 | if (! bfd_section_from_shdr (abfd, hdr->sh_link)) | |
623 | return false; | |
624 | ||
e6667b2b ILT |
625 | /* If this reloc section does not use the main symbol table we |
626 | don't treat it as a reloc section. BFD can't adequately | |
627 | represent such a section, so at least for now, we don't | |
628 | try. We just present it as a normal section. */ | |
629 | if (hdr->sh_link != elf_onesymtab (abfd)) | |
497c5434 ILT |
630 | return _bfd_elf_make_section_from_shdr (abfd, hdr, name); |
631 | ||
244ffee7 JK |
632 | /* Don't allow REL relocations on a machine that uses RELA and |
633 | vice versa. */ | |
634 | /* @@ Actually, the generic ABI does suggest that both might be | |
635 | used in one file. But the four ABI Processor Supplements I | |
636 | have access to right now all specify that only one is used on | |
637 | each of those architectures. It's conceivable that, e.g., a | |
638 | bunch of absolute 32-bit relocs might be more compact in REL | |
639 | form even on a RELA machine... */ | |
497c5434 ILT |
640 | BFD_ASSERT (use_rela_p |
641 | ? (hdr->sh_type == SHT_RELA | |
642 | && hdr->sh_entsize == sizeof (Elf_External_Rela)) | |
643 | : (hdr->sh_type == SHT_REL | |
644 | && hdr->sh_entsize == sizeof (Elf_External_Rel))); | |
645 | ||
646 | if (! bfd_section_from_shdr (abfd, hdr->sh_info)) | |
2e03ce18 | 647 | return false; |
244ffee7 | 648 | target_sect = section_from_elf_index (abfd, hdr->sh_info); |
062189c6 ILT |
649 | if (target_sect == NULL |
650 | || elf_section_data (target_sect) == NULL) | |
244ffee7 JK |
651 | return false; |
652 | ||
32090b8e KR |
653 | hdr2 = &elf_section_data (target_sect)->rel_hdr; |
654 | *hdr2 = *hdr; | |
1c6042ee | 655 | elf_elfsections (abfd)[shindex] = hdr2; |
244ffee7 JK |
656 | target_sect->reloc_count = hdr->sh_size / hdr->sh_entsize; |
657 | target_sect->flags |= SEC_RELOC; | |
497c5434 | 658 | target_sect->relocation = NULL; |
244ffee7 | 659 | target_sect->rel_filepos = hdr->sh_offset; |
32090b8e | 660 | abfd->flags |= HAS_RELOC; |
244ffee7 JK |
661 | return true; |
662 | } | |
663 | break; | |
664 | ||
244ffee7 JK |
665 | case SHT_NOTE: |
666 | #if 0 | |
667 | fprintf (stderr, "Note Sections not yet supported.\n"); | |
668 | BFD_FAIL (); | |
669 | #endif | |
670 | break; | |
671 | ||
672 | case SHT_SHLIB: | |
673 | #if 0 | |
674 | fprintf (stderr, "SHLIB Sections not supported (and non conforming.)\n"); | |
675 | #endif | |
676 | return true; | |
677 | ||
678 | default: | |
e621c5cc ILT |
679 | /* Check for any processor-specific section types. */ |
680 | { | |
681 | struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
682 | ||
683 | if (bed->elf_backend_section_from_shdr) | |
684 | (*bed->elf_backend_section_from_shdr) (abfd, hdr, name); | |
685 | } | |
244ffee7 JK |
686 | break; |
687 | } | |
688 | ||
689 | return true; | |
690 | } | |
691 | ||
fce36137 | 692 | boolean |
1c6042ee ILT |
693 | elf_new_section_hook (abfd, sec) |
694 | bfd *abfd | |
695 | ; | |
696 | asection *sec; | |
fce36137 | 697 | { |
32090b8e | 698 | struct bfd_elf_section_data *sdata; |
300adb31 KR |
699 | |
700 | sdata = (struct bfd_elf_section_data *) bfd_alloc (abfd, sizeof (*sdata)); | |
9783e04a DM |
701 | if (!sdata) |
702 | { | |
d1ad85a6 | 703 | bfd_set_error (bfd_error_no_memory); |
9783e04a DM |
704 | return false; |
705 | } | |
300adb31 | 706 | sec->used_by_bfd = (PTR) sdata; |
32090b8e | 707 | memset (sdata, 0, sizeof (*sdata)); |
244ffee7 JK |
708 | return true; |
709 | } | |
710 | ||
711 | /* Create a new bfd section from an ELF program header. | |
712 | ||
713 | Since program segments have no names, we generate a synthetic name | |
714 | of the form segment<NUM>, where NUM is generally the index in the | |
715 | program header table. For segments that are split (see below) we | |
716 | generate the names segment<NUM>a and segment<NUM>b. | |
717 | ||
718 | Note that some program segments may have a file size that is different than | |
719 | (less than) the memory size. All this means is that at execution the | |
720 | system must allocate the amount of memory specified by the memory size, | |
721 | but only initialize it with the first "file size" bytes read from the | |
722 | file. This would occur for example, with program segments consisting | |
723 | of combined data+bss. | |
724 | ||
725 | To handle the above situation, this routine generates TWO bfd sections | |
726 | for the single program segment. The first has the length specified by | |
727 | the file size of the segment, and the second has the length specified | |
728 | by the difference between the two sizes. In effect, the segment is split | |
729 | into it's initialized and uninitialized parts. | |
730 | ||
731 | */ | |
732 | ||
733 | static boolean | |
1c6042ee ILT |
734 | bfd_section_from_phdr (abfd, hdr, index) |
735 | bfd *abfd; | |
736 | Elf_Internal_Phdr *hdr; | |
737 | int index; | |
244ffee7 JK |
738 | { |
739 | asection *newsect; | |
740 | char *name; | |
741 | char namebuf[64]; | |
742 | int split; | |
743 | ||
744 | split = ((hdr->p_memsz > 0) && | |
745 | (hdr->p_filesz > 0) && | |
746 | (hdr->p_memsz > hdr->p_filesz)); | |
747 | sprintf (namebuf, split ? "segment%da" : "segment%d", index); | |
748 | name = bfd_alloc (abfd, strlen (namebuf) + 1); | |
9783e04a DM |
749 | if (!name) |
750 | { | |
d1ad85a6 | 751 | bfd_set_error (bfd_error_no_memory); |
9783e04a DM |
752 | return false; |
753 | } | |
244ffee7 JK |
754 | strcpy (name, namebuf); |
755 | newsect = bfd_make_section (abfd, name); | |
2e03ce18 ILT |
756 | if (newsect == NULL) |
757 | return false; | |
244ffee7 JK |
758 | newsect->vma = hdr->p_vaddr; |
759 | newsect->_raw_size = hdr->p_filesz; | |
760 | newsect->filepos = hdr->p_offset; | |
761 | newsect->flags |= SEC_HAS_CONTENTS; | |
762 | if (hdr->p_type == PT_LOAD) | |
763 | { | |
764 | newsect->flags |= SEC_ALLOC; | |
765 | newsect->flags |= SEC_LOAD; | |
766 | if (hdr->p_flags & PF_X) | |
767 | { | |
768 | /* FIXME: all we known is that it has execute PERMISSION, | |
769 | may be data. */ | |
770 | newsect->flags |= SEC_CODE; | |
771 | } | |
772 | } | |
773 | if (!(hdr->p_flags & PF_W)) | |
774 | { | |
775 | newsect->flags |= SEC_READONLY; | |
776 | } | |
777 | ||
778 | if (split) | |
779 | { | |
780 | sprintf (namebuf, "segment%db", index); | |
781 | name = bfd_alloc (abfd, strlen (namebuf) + 1); | |
9783e04a DM |
782 | if (!name) |
783 | { | |
d1ad85a6 | 784 | bfd_set_error (bfd_error_no_memory); |
9783e04a DM |
785 | return false; |
786 | } | |
244ffee7 JK |
787 | strcpy (name, namebuf); |
788 | newsect = bfd_make_section (abfd, name); | |
2e03ce18 ILT |
789 | if (newsect == NULL) |
790 | return false; | |
244ffee7 JK |
791 | newsect->vma = hdr->p_vaddr + hdr->p_filesz; |
792 | newsect->_raw_size = hdr->p_memsz - hdr->p_filesz; | |
793 | if (hdr->p_type == PT_LOAD) | |
794 | { | |
795 | newsect->flags |= SEC_ALLOC; | |
796 | if (hdr->p_flags & PF_X) | |
797 | newsect->flags |= SEC_CODE; | |
798 | } | |
799 | if (!(hdr->p_flags & PF_W)) | |
800 | newsect->flags |= SEC_READONLY; | |
801 | } | |
802 | ||
803 | return true; | |
804 | } | |
805 | ||
32090b8e | 806 | /* Begin processing a given object. |
244ffee7 | 807 | |
32090b8e KR |
808 | First we validate the file by reading in the ELF header and checking |
809 | the magic number. */ | |
810 | ||
811 | static INLINE boolean | |
1c6042ee ILT |
812 | elf_file_p (x_ehdrp) |
813 | Elf_External_Ehdr *x_ehdrp; | |
244ffee7 | 814 | { |
32090b8e KR |
815 | return ((x_ehdrp->e_ident[EI_MAG0] == ELFMAG0) |
816 | && (x_ehdrp->e_ident[EI_MAG1] == ELFMAG1) | |
817 | && (x_ehdrp->e_ident[EI_MAG2] == ELFMAG2) | |
818 | && (x_ehdrp->e_ident[EI_MAG3] == ELFMAG3)); | |
819 | } | |
244ffee7 | 820 | |
d24928c0 KR |
821 | /* Check to see if the file associated with ABFD matches the target vector |
822 | that ABFD points to. | |
823 | ||
824 | Note that we may be called several times with the same ABFD, but different | |
825 | target vectors, most of which will not match. We have to avoid leaving | |
826 | any side effects in ABFD, or any data it points to (like tdata), if the | |
6ec3bb6a | 827 | file does not match the target vector. */ |
d24928c0 | 828 | |
2f3508ad | 829 | const bfd_target * |
1c6042ee ILT |
830 | elf_object_p (abfd) |
831 | bfd *abfd; | |
244ffee7 | 832 | { |
32090b8e KR |
833 | Elf_External_Ehdr x_ehdr; /* Elf file header, external form */ |
834 | Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */ | |
835 | Elf_External_Shdr x_shdr; /* Section header table entry, external form */ | |
6ec3bb6a | 836 | Elf_Internal_Shdr *i_shdrp = NULL; /* Section header table, internal form */ |
68241b2b | 837 | unsigned int shindex; |
32090b8e | 838 | char *shstrtab; /* Internal copy of section header stringtab */ |
062189c6 | 839 | struct elf_backend_data *ebd; |
d24928c0 | 840 | struct elf_obj_tdata *preserved_tdata = elf_tdata (abfd); |
6ec3bb6a | 841 | struct elf_obj_tdata *new_tdata = NULL; |
244ffee7 | 842 | |
32090b8e KR |
843 | /* Read in the ELF header in external format. */ |
844 | ||
845 | if (bfd_read ((PTR) & x_ehdr, sizeof (x_ehdr), 1, abfd) != sizeof (x_ehdr)) | |
25057836 JL |
846 | { |
847 | if (bfd_get_error () != bfd_error_system_call) | |
848 | goto got_wrong_format_error; | |
849 | else | |
850 | goto got_no_match; | |
851 | } | |
244ffee7 | 852 | |
32090b8e KR |
853 | /* Now check to see if we have a valid ELF file, and one that BFD can |
854 | make use of. The magic number must match, the address size ('class') | |
855 | and byte-swapping must match our XVEC entry, and it must have a | |
856 | section header table (FIXME: See comments re sections at top of this | |
857 | file). */ | |
244ffee7 | 858 | |
d24928c0 KR |
859 | if ((elf_file_p (&x_ehdr) == false) || |
860 | (x_ehdr.e_ident[EI_VERSION] != EV_CURRENT) || | |
861 | (x_ehdr.e_ident[EI_CLASS] != ELFCLASS)) | |
862 | goto got_wrong_format_error; | |
244ffee7 | 863 | |
d24928c0 | 864 | /* Check that file's byte order matches xvec's */ |
32090b8e | 865 | switch (x_ehdr.e_ident[EI_DATA]) |
244ffee7 | 866 | { |
32090b8e KR |
867 | case ELFDATA2MSB: /* Big-endian */ |
868 | if (!abfd->xvec->header_byteorder_big_p) | |
d24928c0 | 869 | goto got_wrong_format_error; |
32090b8e KR |
870 | break; |
871 | case ELFDATA2LSB: /* Little-endian */ | |
872 | if (abfd->xvec->header_byteorder_big_p) | |
d24928c0 | 873 | goto got_wrong_format_error; |
32090b8e KR |
874 | break; |
875 | case ELFDATANONE: /* No data encoding specified */ | |
876 | default: /* Unknown data encoding specified */ | |
d24928c0 | 877 | goto got_wrong_format_error; |
244ffee7 | 878 | } |
244ffee7 | 879 | |
32090b8e | 880 | /* Allocate an instance of the elf_obj_tdata structure and hook it up to |
6ec3bb6a | 881 | the tdata pointer in the bfd. */ |
244ffee7 | 882 | |
6ec3bb6a ILT |
883 | new_tdata = ((struct elf_obj_tdata *) |
884 | bfd_zalloc (abfd, sizeof (struct elf_obj_tdata))); | |
885 | if (new_tdata == NULL) | |
d24928c0 | 886 | goto got_no_memory_error; |
6ec3bb6a | 887 | elf_tdata (abfd) = new_tdata; |
244ffee7 | 888 | |
32090b8e KR |
889 | /* Now that we know the byte order, swap in the rest of the header */ |
890 | i_ehdrp = elf_elfheader (abfd); | |
891 | elf_swap_ehdr_in (abfd, &x_ehdr, i_ehdrp); | |
892 | #if DEBUG & 1 | |
893 | elf_debug_file (i_ehdrp); | |
244ffee7 JK |
894 | #endif |
895 | ||
32090b8e KR |
896 | /* If there is no section header table, we're hosed. */ |
897 | if (i_ehdrp->e_shoff == 0) | |
d24928c0 | 898 | goto got_wrong_format_error; |
244ffee7 | 899 | |
062189c6 ILT |
900 | /* As a simple sanity check, verify that the what BFD thinks is the |
901 | size of each section header table entry actually matches the size | |
902 | recorded in the file. */ | |
903 | if (i_ehdrp->e_shentsize != sizeof (x_shdr)) | |
904 | goto got_wrong_format_error; | |
905 | ||
906 | ebd = get_elf_backend_data (abfd); | |
907 | ||
908 | /* Check that the ELF e_machine field matches what this particular | |
909 | BFD format expects. */ | |
910 | if (ebd->elf_machine_code != i_ehdrp->e_machine) | |
911 | { | |
2f3508ad | 912 | const bfd_target * const *target_ptr; |
062189c6 ILT |
913 | |
914 | if (ebd->elf_machine_code != EM_NONE) | |
915 | goto got_wrong_format_error; | |
916 | ||
917 | /* This is the generic ELF target. Let it match any ELF target | |
918 | for which we do not have a specific backend. */ | |
f4bd7a8f | 919 | for (target_ptr = bfd_target_vector; *target_ptr != NULL; target_ptr++) |
062189c6 ILT |
920 | { |
921 | struct elf_backend_data *back; | |
922 | ||
923 | if ((*target_ptr)->flavour != bfd_target_elf_flavour) | |
924 | continue; | |
925 | back = (struct elf_backend_data *) (*target_ptr)->backend_data; | |
926 | if (back->elf_machine_code == i_ehdrp->e_machine) | |
927 | { | |
928 | /* target_ptr is an ELF backend which matches this | |
929 | object file, so reject the generic ELF target. */ | |
930 | goto got_wrong_format_error; | |
931 | } | |
932 | } | |
933 | } | |
934 | ||
7b8106b4 | 935 | if (i_ehdrp->e_type == ET_EXEC) |
32090b8e | 936 | abfd->flags |= EXEC_P; |
7b8106b4 ILT |
937 | else if (i_ehdrp->e_type == ET_DYN) |
938 | abfd->flags |= DYNAMIC; | |
244ffee7 | 939 | |
fa15568a ILT |
940 | if (i_ehdrp->e_phnum > 0) |
941 | abfd->flags |= D_PAGED; | |
942 | ||
6ec3bb6a ILT |
943 | if (! bfd_default_set_arch_mach (abfd, ebd->arch, 0)) |
944 | goto got_no_match; | |
32090b8e | 945 | |
062189c6 ILT |
946 | /* Remember the entry point specified in the ELF file header. */ |
947 | bfd_get_start_address (abfd) = i_ehdrp->e_entry; | |
32090b8e KR |
948 | |
949 | /* Allocate space for a copy of the section header table in | |
950 | internal form, seek to the section header table in the file, | |
062189c6 | 951 | read it in, and convert it to internal form. */ |
6ec3bb6a ILT |
952 | i_shdrp = ((Elf_Internal_Shdr *) |
953 | bfd_alloc (abfd, sizeof (*i_shdrp) * i_ehdrp->e_shnum)); | |
954 | elf_elfsections (abfd) = ((Elf_Internal_Shdr **) | |
955 | bfd_alloc (abfd, | |
956 | sizeof (i_shdrp) * i_ehdrp->e_shnum)); | |
1c6042ee | 957 | if (!i_shdrp || !elf_elfsections (abfd)) |
d24928c0 | 958 | goto got_no_memory_error; |
6ec3bb6a | 959 | if (bfd_seek (abfd, i_ehdrp->e_shoff, SEEK_SET) != 0) |
25057836 | 960 | goto got_no_match; |
32090b8e | 961 | for (shindex = 0; shindex < i_ehdrp->e_shnum; shindex++) |
244ffee7 | 962 | { |
d24928c0 | 963 | if (bfd_read ((PTR) & x_shdr, sizeof x_shdr, 1, abfd) != sizeof (x_shdr)) |
25057836 | 964 | goto got_no_match; |
32090b8e | 965 | elf_swap_shdr_in (abfd, &x_shdr, i_shdrp + shindex); |
1c6042ee | 966 | elf_elfsections (abfd)[shindex] = i_shdrp + shindex; |
244ffee7 | 967 | } |
32090b8e | 968 | if (i_ehdrp->e_shstrndx) |
244ffee7 | 969 | { |
2e03ce18 ILT |
970 | if (! bfd_section_from_shdr (abfd, i_ehdrp->e_shstrndx)) |
971 | goto got_no_match; | |
244ffee7 JK |
972 | } |
973 | ||
32090b8e KR |
974 | /* Read in the string table containing the names of the sections. We |
975 | will need the base pointer to this table later. */ | |
976 | /* We read this inline now, so that we don't have to go through | |
977 | bfd_section_from_shdr with it (since this particular strtab is | |
978 | used to find all of the ELF section names.) */ | |
244ffee7 | 979 | |
32090b8e KR |
980 | shstrtab = elf_get_str_section (abfd, i_ehdrp->e_shstrndx); |
981 | if (!shstrtab) | |
6ec3bb6a | 982 | goto got_no_match; |
244ffee7 | 983 | |
32090b8e KR |
984 | /* Once all of the section headers have been read and converted, we |
985 | can start processing them. Note that the first section header is | |
6ec3bb6a | 986 | a dummy placeholder entry, so we ignore it. */ |
244ffee7 | 987 | |
32090b8e KR |
988 | for (shindex = 1; shindex < i_ehdrp->e_shnum; shindex++) |
989 | { | |
2e03ce18 ILT |
990 | if (! bfd_section_from_shdr (abfd, shindex)) |
991 | goto got_no_match; | |
32090b8e | 992 | } |
244ffee7 | 993 | |
5315c428 ILT |
994 | /* Let the backend double check the format and override global |
995 | information. */ | |
996 | if (ebd->elf_backend_object_p) | |
997 | { | |
998 | if ((*ebd->elf_backend_object_p) (abfd) == false) | |
999 | goto got_wrong_format_error; | |
1000 | } | |
1001 | ||
d24928c0 KR |
1002 | return (abfd->xvec); |
1003 | ||
1c6042ee | 1004 | got_wrong_format_error: |
d1ad85a6 | 1005 | bfd_set_error (bfd_error_wrong_format); |
d24928c0 | 1006 | goto got_no_match; |
1c6042ee | 1007 | got_no_memory_error: |
d1ad85a6 | 1008 | bfd_set_error (bfd_error_no_memory); |
d24928c0 | 1009 | goto got_no_match; |
1c6042ee | 1010 | got_no_match: |
6ec3bb6a ILT |
1011 | if (new_tdata != NULL |
1012 | && new_tdata->elf_sect_ptr != NULL) | |
1013 | bfd_release (abfd, new_tdata->elf_sect_ptr); | |
1014 | if (i_shdrp != NULL) | |
1015 | bfd_release (abfd, i_shdrp); | |
1016 | if (new_tdata != NULL) | |
1017 | bfd_release (abfd, new_tdata); | |
d24928c0 KR |
1018 | elf_tdata (abfd) = preserved_tdata; |
1019 | return (NULL); | |
32090b8e | 1020 | } |
32090b8e | 1021 | \f |
1c6042ee | 1022 | |
32090b8e KR |
1023 | /* ELF .o/exec file writing */ |
1024 | ||
d24928c0 KR |
1025 | /* Takes a bfd and a symbol, returns a pointer to the elf specific area |
1026 | of the symbol if there is one. */ | |
32090b8e | 1027 | static INLINE elf_symbol_type * |
1c6042ee ILT |
1028 | elf_symbol_from (ignore_abfd, symbol) |
1029 | bfd *ignore_abfd; | |
1030 | asymbol *symbol; | |
244ffee7 | 1031 | { |
32090b8e KR |
1032 | if (symbol->the_bfd->xvec->flavour != bfd_target_elf_flavour) |
1033 | return 0; | |
1034 | ||
1035 | if (symbol->the_bfd->tdata.elf_obj_data == (struct elf_obj_tdata *) NULL) | |
1036 | return 0; | |
1037 | ||
1038 | return (elf_symbol_type *) symbol; | |
244ffee7 JK |
1039 | } |
1040 | ||
32090b8e KR |
1041 | void |
1042 | write_relocs (abfd, sec, xxx) | |
1043 | bfd *abfd; | |
1044 | asection *sec; | |
1045 | PTR xxx; | |
1046 | { | |
1047 | Elf_Internal_Shdr *rela_hdr; | |
1048 | Elf_External_Rela *outbound_relocas; | |
1049 | Elf_External_Rel *outbound_relocs; | |
1050 | int idx; | |
1051 | int use_rela_p = get_elf_backend_data (abfd)->use_rela_p; | |
300adb31 | 1052 | asymbol *last_sym = 0; |
38a5f510 | 1053 | int last_sym_idx = 9999999; /* should always be written before use */ |
244ffee7 | 1054 | |
32090b8e KR |
1055 | if ((sec->flags & SEC_RELOC) == 0) |
1056 | return; | |
6ec3bb6a ILT |
1057 | |
1058 | /* The linker backend writes the relocs out itself, and sets the | |
1059 | reloc_count field to zero to inhibit writing them here. Also, | |
1060 | sometimes the SEC_RELOC flag gets set even when there aren't any | |
1061 | relocs. */ | |
32090b8e KR |
1062 | if (sec->reloc_count == 0) |
1063 | return; | |
244ffee7 | 1064 | |
32090b8e | 1065 | rela_hdr = &elf_section_data (sec)->rel_hdr; |
244ffee7 | 1066 | |
32090b8e KR |
1067 | rela_hdr->sh_size = rela_hdr->sh_entsize * sec->reloc_count; |
1068 | rela_hdr->contents = (void *) bfd_alloc (abfd, rela_hdr->sh_size); | |
9783e04a DM |
1069 | if (!rela_hdr->contents) |
1070 | { | |
d1ad85a6 | 1071 | bfd_set_error (bfd_error_no_memory); |
1c6042ee | 1072 | abort (); /* FIXME */ |
9783e04a | 1073 | } |
244ffee7 | 1074 | |
32090b8e | 1075 | /* orelocation has the data, reloc_count has the count... */ |
300adb31 KR |
1076 | if (use_rela_p) |
1077 | { | |
1078 | outbound_relocas = (Elf_External_Rela *) rela_hdr->contents; | |
1079 | ||
1080 | for (idx = 0; idx < sec->reloc_count; idx++) | |
32090b8e | 1081 | { |
300adb31 KR |
1082 | Elf_Internal_Rela dst_rela; |
1083 | Elf_External_Rela *src_rela; | |
1084 | arelent *ptr; | |
1085 | asymbol *sym; | |
1086 | int n; | |
1087 | ||
1088 | ptr = sec->orelocation[idx]; | |
1089 | src_rela = outbound_relocas + idx; | |
1090 | if (!(abfd->flags & EXEC_P)) | |
1091 | dst_rela.r_offset = ptr->address - sec->vma; | |
1092 | else | |
1093 | dst_rela.r_offset = ptr->address; | |
6a3eb9b6 | 1094 | |
300adb31 KR |
1095 | sym = *ptr->sym_ptr_ptr; |
1096 | if (sym == last_sym) | |
1097 | n = last_sym_idx; | |
1098 | else | |
32090b8e | 1099 | { |
300adb31 KR |
1100 | last_sym = sym; |
1101 | last_sym_idx = n = elf_symbol_from_bfd_symbol (abfd, &sym); | |
32090b8e | 1102 | } |
300adb31 KR |
1103 | dst_rela.r_info = ELF_R_INFO (n, ptr->howto->type); |
1104 | ||
1105 | dst_rela.r_addend = ptr->addend; | |
1106 | elf_swap_reloca_out (abfd, &dst_rela, src_rela); | |
244ffee7 | 1107 | } |
300adb31 KR |
1108 | } |
1109 | else | |
1110 | /* REL relocations */ | |
1111 | { | |
1112 | outbound_relocs = (Elf_External_Rel *) rela_hdr->contents; | |
1113 | ||
1114 | for (idx = 0; idx < sec->reloc_count; idx++) | |
32090b8e | 1115 | { |
300adb31 KR |
1116 | Elf_Internal_Rel dst_rel; |
1117 | Elf_External_Rel *src_rel; | |
1118 | arelent *ptr; | |
1119 | int n; | |
1120 | asymbol *sym; | |
1121 | ||
1122 | ptr = sec->orelocation[idx]; | |
1123 | sym = *ptr->sym_ptr_ptr; | |
1124 | src_rel = outbound_relocs + idx; | |
1125 | if (!(abfd->flags & EXEC_P)) | |
1126 | dst_rel.r_offset = ptr->address - sec->vma; | |
1127 | else | |
1128 | dst_rel.r_offset = ptr->address; | |
244ffee7 | 1129 | |
300adb31 KR |
1130 | if (sym == last_sym) |
1131 | n = last_sym_idx; | |
1132 | else | |
32090b8e | 1133 | { |
300adb31 KR |
1134 | last_sym = sym; |
1135 | last_sym_idx = n = elf_symbol_from_bfd_symbol (abfd, &sym); | |
32090b8e | 1136 | } |
300adb31 KR |
1137 | dst_rel.r_info = ELF_R_INFO (n, ptr->howto->type); |
1138 | ||
1139 | elf_swap_reloc_out (abfd, &dst_rel, src_rel); | |
32090b8e | 1140 | } |
300adb31 | 1141 | } |
32090b8e | 1142 | } |
244ffee7 | 1143 | |
fa15568a | 1144 | /* Set up an ELF internal section header for a section. */ |
244ffee7 | 1145 | |
fa15568a | 1146 | /*ARGSUSED*/ |
32090b8e | 1147 | static void |
fa15568a | 1148 | elf_fake_sections (abfd, asect, ignore) |
1c6042ee ILT |
1149 | bfd *abfd; |
1150 | asection *asect; | |
fa15568a | 1151 | PTR ignore; |
32090b8e | 1152 | { |
32090b8e | 1153 | Elf_Internal_Shdr *this_hdr; |
fa15568a | 1154 | |
32090b8e | 1155 | this_hdr = &elf_section_data (asect)->this_hdr; |
fa15568a ILT |
1156 | |
1157 | this_hdr->sh_name = bfd_add_to_strtab (abfd, elf_shstrtab (abfd), | |
1158 | asect->name); | |
6ec3bb6a ILT |
1159 | if (this_hdr->sh_name == (unsigned long) -1) |
1160 | abort (); /* FIXME */ | |
fa15568a ILT |
1161 | |
1162 | this_hdr->sh_flags = 0; | |
1163 | if ((asect->flags & SEC_ALLOC) != 0) | |
1164 | this_hdr->sh_addr = asect->vma; | |
1165 | else | |
1166 | this_hdr->sh_addr = 0; | |
1167 | this_hdr->sh_offset = 0; | |
1168 | this_hdr->sh_size = asect->_raw_size; | |
1169 | this_hdr->sh_link = 0; | |
1170 | this_hdr->sh_info = 0; | |
32090b8e | 1171 | this_hdr->sh_addralign = 1 << asect->alignment_power; |
fa15568a ILT |
1172 | this_hdr->sh_entsize = 0; |
1173 | ||
1174 | this_hdr->rawdata = (PTR) asect; | |
1175 | this_hdr->contents = NULL; | |
1176 | this_hdr->size = 0; | |
013dec1a ILT |
1177 | |
1178 | /* FIXME: This should not be based on section names. */ | |
1179 | if (strcmp (asect->name, ".dynstr") == 0) | |
1180 | this_hdr->sh_type = SHT_STRTAB; | |
1181 | else if (strcmp (asect->name, ".hash") == 0) | |
fa15568a ILT |
1182 | { |
1183 | this_hdr->sh_type = SHT_HASH; | |
1184 | this_hdr->sh_entsize = ARCH_SIZE / 8; | |
1185 | } | |
013dec1a | 1186 | else if (strcmp (asect->name, ".dynsym") == 0) |
fa15568a ILT |
1187 | { |
1188 | this_hdr->sh_type = SHT_DYNSYM; | |
1189 | this_hdr->sh_entsize = sizeof (Elf_External_Sym); | |
1190 | } | |
013dec1a | 1191 | else if (strcmp (asect->name, ".dynamic") == 0) |
fa15568a ILT |
1192 | { |
1193 | this_hdr->sh_type = SHT_DYNAMIC; | |
1194 | this_hdr->sh_entsize = sizeof (Elf_External_Dyn); | |
1195 | } | |
013dec1a | 1196 | else if (strncmp (asect->name, ".rel.", 5) == 0) |
fa15568a ILT |
1197 | { |
1198 | this_hdr->sh_type = SHT_REL; | |
1199 | this_hdr->sh_entsize = sizeof (Elf_External_Rel); | |
1200 | } | |
013dec1a | 1201 | else if (strncmp (asect->name, ".rela.", 6) == 0) |
fa15568a ILT |
1202 | { |
1203 | this_hdr->sh_type = SHT_RELA; | |
1204 | this_hdr->sh_entsize = sizeof (Elf_External_Rela); | |
1205 | } | |
1206 | else if (strcmp (asect->name, ".note") == 0) | |
1207 | this_hdr->sh_type = SHT_NOTE; | |
1208 | else if (strncmp (asect->name, ".stab", 5) == 0 | |
1209 | && strcmp (asect->name + strlen (asect->name) - 3, "str") == 0) | |
1210 | this_hdr->sh_type = SHT_STRTAB; | |
1211 | else if ((asect->flags & SEC_ALLOC) != 0 | |
1212 | && (asect->flags & SEC_LOAD) != 0) | |
32090b8e | 1213 | this_hdr->sh_type = SHT_PROGBITS; |
fa15568a ILT |
1214 | else if ((asect->flags & SEC_ALLOC) != 0 |
1215 | && ((asect->flags & SEC_LOAD) == 0)) | |
e621c5cc | 1216 | { |
6c35a16d ILT |
1217 | BFD_ASSERT (strcmp (asect->name, ".bss") == 0 |
1218 | || strcmp (asect->name, ".sbss") == 0); | |
e621c5cc ILT |
1219 | this_hdr->sh_type = SHT_NOBITS; |
1220 | } | |
32090b8e | 1221 | else |
fa15568a ILT |
1222 | { |
1223 | /* Who knows? */ | |
1224 | this_hdr->sh_type = SHT_PROGBITS; | |
1225 | } | |
32090b8e | 1226 | |
fa15568a ILT |
1227 | if ((asect->flags & SEC_ALLOC) != 0) |
1228 | this_hdr->sh_flags |= SHF_ALLOC; | |
1229 | if ((asect->flags & SEC_READONLY) == 0) | |
1230 | this_hdr->sh_flags |= SHF_WRITE; | |
1231 | if ((asect->flags & SEC_CODE) != 0) | |
1232 | this_hdr->sh_flags |= SHF_EXECINSTR; | |
244ffee7 | 1233 | |
fa15568a | 1234 | /* Check for processor-specific section types. */ |
f035cc47 ILT |
1235 | { |
1236 | struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
1237 | ||
1238 | if (bed->elf_backend_fake_sections) | |
1239 | (*bed->elf_backend_fake_sections) (abfd, this_hdr, asect); | |
1240 | } | |
1241 | ||
fa15568a ILT |
1242 | /* If the section has relocs, set up a section header for the |
1243 | SHT_REL[A] section. */ | |
1244 | if ((asect->flags & SEC_RELOC) != 0) | |
1245 | { | |
1246 | Elf_Internal_Shdr *rela_hdr; | |
1247 | int use_rela_p = get_elf_backend_data (abfd)->use_rela_p; | |
244ffee7 | 1248 | |
fa15568a ILT |
1249 | rela_hdr = &elf_section_data (asect)->rel_hdr; |
1250 | rela_hdr->sh_name = | |
1251 | bfd_add_2_to_strtab (abfd, elf_shstrtab (abfd), | |
1252 | use_rela_p ? ".rela" : ".rel", | |
1253 | asect->name); | |
1254 | rela_hdr->sh_type = use_rela_p ? SHT_RELA : SHT_REL; | |
1255 | rela_hdr->sh_entsize = (use_rela_p | |
1256 | ? sizeof (Elf_External_Rela) | |
1257 | : sizeof (Elf_External_Rel)); | |
1258 | rela_hdr->sh_addralign = FILE_ALIGN; | |
1259 | rela_hdr->sh_flags = 0; | |
1260 | rela_hdr->sh_addr = 0; | |
1261 | rela_hdr->sh_size = 0; | |
1262 | rela_hdr->sh_offset = 0; | |
1263 | rela_hdr->size = 0; | |
1264 | } | |
1265 | } | |
244ffee7 | 1266 | |
fa15568a ILT |
1267 | /* Assign all ELF section numbers. The dummy first section is handled here |
1268 | too. The link/info pointers for the standard section types are filled | |
e6667b2b | 1269 | in here too, while we're at it. */ |
244ffee7 | 1270 | |
fa15568a ILT |
1271 | static boolean |
1272 | assign_section_numbers (abfd) | |
1273 | bfd *abfd; | |
1274 | { | |
1275 | struct elf_obj_tdata *t = elf_tdata (abfd); | |
1276 | asection *sec; | |
1277 | unsigned int section_number; | |
1278 | Elf_Internal_Shdr **i_shdrp; | |
1279 | ||
1280 | section_number = 1; | |
1281 | ||
fa15568a ILT |
1282 | for (sec = abfd->sections; sec; sec = sec->next) |
1283 | { | |
1284 | struct bfd_elf_section_data *d = elf_section_data (sec); | |
1285 | ||
1286 | d->this_idx = section_number++; | |
1287 | if ((sec->flags & SEC_RELOC) == 0) | |
1288 | d->rel_idx = 0; | |
1289 | else | |
1290 | d->rel_idx = section_number++; | |
1291 | } | |
1292 | ||
7c726b66 ILT |
1293 | t->shstrtab_section = section_number++; |
1294 | elf_elfheader (abfd)->e_shstrndx = t->shstrtab_section; | |
1295 | t->shstrtab_hdr.sh_size = elf_shstrtab (abfd)->length; | |
1296 | t->shstrtab_hdr.contents = (PTR) elf_shstrtab (abfd)->tab; | |
1297 | ||
1298 | if (abfd->symcount > 0) | |
1299 | { | |
1300 | t->symtab_section = section_number++; | |
1301 | t->strtab_section = section_number++; | |
1302 | } | |
1303 | ||
fa15568a ILT |
1304 | elf_elfheader (abfd)->e_shnum = section_number; |
1305 | ||
1306 | /* Set up the list of section header pointers, in agreement with the | |
1307 | indices. */ | |
1308 | i_shdrp = ((Elf_Internal_Shdr **) | |
1309 | bfd_alloc (abfd, section_number * sizeof (Elf_Internal_Shdr *))); | |
1310 | if (i_shdrp == NULL) | |
1311 | { | |
1312 | bfd_set_error (bfd_error_no_memory); | |
1313 | return false; | |
1314 | } | |
1315 | ||
1316 | i_shdrp[0] = ((Elf_Internal_Shdr *) | |
1317 | bfd_alloc (abfd, sizeof (Elf_Internal_Shdr))); | |
1318 | if (i_shdrp[0] == NULL) | |
1319 | { | |
1320 | bfd_release (abfd, i_shdrp); | |
1321 | bfd_set_error (bfd_error_no_memory); | |
1322 | return false; | |
1323 | } | |
1324 | memset (i_shdrp[0], 0, sizeof (Elf_Internal_Shdr)); | |
1325 | ||
1326 | elf_elfsections (abfd) = i_shdrp; | |
1327 | ||
1328 | i_shdrp[t->shstrtab_section] = &t->shstrtab_hdr; | |
1329 | if (abfd->symcount > 0) | |
1330 | { | |
1331 | i_shdrp[t->symtab_section] = &t->symtab_hdr; | |
1332 | i_shdrp[t->strtab_section] = &t->strtab_hdr; | |
1333 | t->symtab_hdr.sh_link = t->strtab_section; | |
1334 | } | |
1335 | for (sec = abfd->sections; sec; sec = sec->next) | |
32090b8e | 1336 | { |
fa15568a ILT |
1337 | struct bfd_elf_section_data *d = elf_section_data (sec); |
1338 | asection *s; | |
1339 | const char *name; | |
1340 | ||
1341 | i_shdrp[d->this_idx] = &d->this_hdr; | |
1342 | if (d->rel_idx != 0) | |
1343 | i_shdrp[d->rel_idx] = &d->rel_hdr; | |
1344 | ||
1345 | /* Fill in the sh_link and sh_info fields while we're at it. */ | |
1346 | ||
1347 | /* sh_link of a reloc section is the section index of the symbol | |
1348 | table. sh_info is the section index of the section to which | |
1349 | the relocation entries apply. */ | |
1350 | if (d->rel_idx != 0) | |
1351 | { | |
1352 | d->rel_hdr.sh_link = t->symtab_section; | |
1353 | d->rel_hdr.sh_info = d->this_idx; | |
1354 | } | |
1355 | ||
1356 | switch (d->this_hdr.sh_type) | |
32090b8e | 1357 | { |
fa15568a ILT |
1358 | case SHT_REL: |
1359 | case SHT_RELA: | |
1360 | /* A reloc section which we are treating as a normal BFD | |
1361 | section. sh_link is the section index of the symbol | |
1362 | table. sh_info is the section index of the section to | |
1363 | which the relocation entries apply. We assume that an | |
1364 | allocated reloc section uses the dynamic symbol table. | |
1365 | FIXME: How can we be sure? */ | |
1366 | s = bfd_get_section_by_name (abfd, ".dynsym"); | |
1367 | if (s != NULL) | |
1368 | d->this_hdr.sh_link = elf_section_data (s)->this_idx; | |
1369 | ||
1370 | /* We look up the section the relocs apply to by name. */ | |
1371 | name = sec->name; | |
1372 | if (d->this_hdr.sh_type == SHT_REL) | |
1373 | name += 4; | |
1374 | else | |
1375 | name += 5; | |
1376 | s = bfd_get_section_by_name (abfd, name); | |
1377 | if (s != NULL) | |
1378 | d->this_hdr.sh_info = elf_section_data (s)->this_idx; | |
1379 | break; | |
1380 | ||
1381 | case SHT_STRTAB: | |
1382 | /* We assume that a section named .stab*str is a stabs | |
1383 | string section. We look for a section with the same name | |
1384 | but without the trailing ``str'', and set its sh_link | |
1385 | field to point to this section. */ | |
1386 | if (strncmp (sec->name, ".stab", sizeof ".stab" - 1) == 0 | |
1387 | && strcmp (sec->name + strlen (sec->name) - 3, "str") == 0) | |
1388 | { | |
1389 | size_t len; | |
1390 | char *alc; | |
1391 | ||
1392 | len = strlen (sec->name); | |
1393 | alc = (char *) malloc (len - 2); | |
1394 | if (alc == NULL) | |
1395 | { | |
1396 | bfd_set_error (bfd_error_no_memory); | |
1397 | return false; | |
1398 | } | |
1399 | strncpy (alc, sec->name, len - 3); | |
1400 | alc[len - 3] = '\0'; | |
1401 | s = bfd_get_section_by_name (abfd, alc); | |
1402 | free (alc); | |
1403 | if (s != NULL) | |
1404 | { | |
1405 | elf_section_data (s)->this_hdr.sh_link = d->this_idx; | |
1406 | ||
1407 | /* This is a .stab section. */ | |
1408 | elf_section_data (s)->this_hdr.sh_entsize = | |
1409 | 4 + 2 * (ARCH_SIZE / 8); | |
1410 | } | |
1411 | } | |
1412 | break; | |
1413 | ||
1414 | case SHT_DYNAMIC: | |
1415 | case SHT_DYNSYM: | |
1416 | /* sh_link is the section header index of the string table | |
1417 | used for the dynamic entries or symbol table. */ | |
1418 | s = bfd_get_section_by_name (abfd, ".dynstr"); | |
1419 | if (s != NULL) | |
1420 | d->this_hdr.sh_link = elf_section_data (s)->this_idx; | |
1421 | break; | |
1422 | ||
1423 | case SHT_HASH: | |
1424 | /* sh_link is the section header index of the symbol table | |
1425 | this hash table is for. */ | |
1426 | s = bfd_get_section_by_name (abfd, ".dynsym"); | |
1427 | if (s != NULL) | |
1428 | d->this_hdr.sh_link = elf_section_data (s)->this_idx; | |
1429 | break; | |
32090b8e KR |
1430 | } |
1431 | } | |
fa15568a ILT |
1432 | |
1433 | return true; | |
244ffee7 JK |
1434 | } |
1435 | ||
32090b8e KR |
1436 | /* Map symbol from it's internal number to the external number, moving |
1437 | all local symbols to be at the head of the list. */ | |
244ffee7 | 1438 | |
32090b8e | 1439 | static INLINE int |
062189c6 ILT |
1440 | sym_is_global (abfd, sym) |
1441 | bfd *abfd; | |
32090b8e KR |
1442 | asymbol *sym; |
1443 | { | |
062189c6 ILT |
1444 | /* If the backend has a special mapping, use it. */ |
1445 | if (get_elf_backend_data (abfd)->elf_backend_sym_is_global) | |
1446 | return ((*get_elf_backend_data (abfd)->elf_backend_sym_is_global) | |
1447 | (abfd, sym)); | |
1448 | ||
d24928c0 | 1449 | if (sym->flags & (BSF_GLOBAL | BSF_WEAK)) |
244ffee7 | 1450 | { |
32090b8e KR |
1451 | if (sym->flags & BSF_LOCAL) |
1452 | abort (); | |
1453 | return 1; | |
244ffee7 | 1454 | } |
d24928c0 KR |
1455 | if (sym->section == 0) |
1456 | { | |
1457 | /* Is this valid? */ | |
1458 | abort (); | |
1459 | ||
1460 | return 1; | |
1461 | } | |
badd23e3 | 1462 | if (bfd_is_und_section (sym->section)) |
32090b8e KR |
1463 | return 1; |
1464 | if (bfd_is_com_section (sym->section)) | |
1465 | return 1; | |
1466 | if (sym->flags & (BSF_LOCAL | BSF_SECTION_SYM | BSF_FILE)) | |
1467 | return 0; | |
1468 | return 0; | |
1469 | } | |
244ffee7 | 1470 | |
9783e04a | 1471 | static boolean |
1c6042ee ILT |
1472 | elf_map_symbols (abfd) |
1473 | bfd *abfd; | |
32090b8e KR |
1474 | { |
1475 | int symcount = bfd_get_symcount (abfd); | |
1476 | asymbol **syms = bfd_get_outsymbols (abfd); | |
d24928c0 | 1477 | asymbol **sect_syms; |
32090b8e KR |
1478 | int num_locals = 0; |
1479 | int num_globals = 0; | |
1480 | int num_locals2 = 0; | |
1481 | int num_globals2 = 0; | |
d24928c0 | 1482 | int max_index = 0; |
32090b8e | 1483 | int num_sections = 0; |
d24928c0 | 1484 | Elf_Sym_Extra *sym_extra; |
32090b8e KR |
1485 | int idx; |
1486 | asection *asect; | |
6a3eb9b6 | 1487 | |
32090b8e KR |
1488 | #ifdef DEBUG |
1489 | fprintf (stderr, "elf_map_symbols\n"); | |
1490 | fflush (stderr); | |
1491 | #endif | |
244ffee7 | 1492 | |
e621c5cc ILT |
1493 | /* Add local symbols for each section for which there are relocs. |
1494 | FIXME: How can we tell which sections have relocs at this point? | |
1495 | Will reloc_count always be accurate? Actually, I think most ELF | |
1496 | targets create section symbols for all sections anyhow. */ | |
32090b8e | 1497 | for (asect = abfd->sections; asect; asect = asect->next) |
244ffee7 | 1498 | { |
d24928c0 KR |
1499 | if (max_index < asect->index) |
1500 | max_index = asect->index; | |
244ffee7 JK |
1501 | } |
1502 | ||
d24928c0 KR |
1503 | max_index++; |
1504 | elf_num_section_syms (abfd) = max_index; | |
1505 | sect_syms = (asymbol **) bfd_zalloc (abfd, max_index * sizeof (asymbol *)); | |
1506 | elf_section_syms (abfd) = sect_syms; | |
1507 | ||
5e829a34 | 1508 | if (sect_syms == 0) |
9783e04a | 1509 | { |
d1ad85a6 | 1510 | bfd_set_error (bfd_error_no_memory); |
9783e04a DM |
1511 | return false; |
1512 | } | |
d24928c0 KR |
1513 | |
1514 | for (asect = abfd->sections; asect; asect = asect->next) | |
e621c5cc ILT |
1515 | { |
1516 | asymbol *sym = bfd_make_empty_symbol (abfd); | |
9783e04a DM |
1517 | if (!sym) |
1518 | { | |
d1ad85a6 | 1519 | bfd_set_error (bfd_error_no_memory); |
9783e04a DM |
1520 | return false; |
1521 | } | |
e621c5cc ILT |
1522 | sym->the_bfd = abfd; |
1523 | sym->name = asect->name; | |
1524 | sym->value = asect->vma; | |
1525 | sym->flags = BSF_SECTION_SYM; | |
1526 | sym->section = asect; | |
1527 | sect_syms[asect->index] = sym; | |
1528 | num_sections++; | |
d24928c0 | 1529 | #ifdef DEBUG |
e621c5cc ILT |
1530 | fprintf (stderr, |
1531 | "creating section symbol, name = %s, value = 0x%.8lx, index = %d, section = 0x%.8lx\n", | |
1532 | asect->name, (long) asect->vma, asect->index, (long) asect); | |
d24928c0 | 1533 | #endif |
e621c5cc | 1534 | } |
d24928c0 | 1535 | |
32090b8e | 1536 | if (num_sections) |
244ffee7 | 1537 | { |
32090b8e KR |
1538 | if (syms) |
1539 | syms = (asymbol **) bfd_realloc (abfd, syms, | |
1540 | ((symcount + num_sections + 1) | |
1541 | * sizeof (asymbol *))); | |
1542 | else | |
1543 | syms = (asymbol **) bfd_alloc (abfd, | |
1c6042ee | 1544 | (num_sections + 1) * sizeof (asymbol *)); |
9783e04a DM |
1545 | if (!syms) |
1546 | { | |
d1ad85a6 | 1547 | bfd_set_error (bfd_error_no_memory); |
9783e04a DM |
1548 | return false; |
1549 | } | |
244ffee7 | 1550 | |
32090b8e KR |
1551 | for (asect = abfd->sections; asect; asect = asect->next) |
1552 | { | |
d24928c0 KR |
1553 | if (sect_syms[asect->index]) |
1554 | syms[symcount++] = sect_syms[asect->index]; | |
32090b8e | 1555 | } |
244ffee7 | 1556 | |
32090b8e KR |
1557 | syms[symcount] = (asymbol *) 0; |
1558 | bfd_set_symtab (abfd, syms, symcount); | |
1559 | } | |
244ffee7 | 1560 | |
d24928c0 KR |
1561 | elf_sym_extra (abfd) = sym_extra |
1562 | = (Elf_Sym_Extra *) bfd_alloc (abfd, symcount * sizeof (Elf_Sym_Extra)); | |
9783e04a DM |
1563 | if (!sym_extra) |
1564 | { | |
d1ad85a6 | 1565 | bfd_set_error (bfd_error_no_memory); |
9783e04a DM |
1566 | return false; |
1567 | } | |
244ffee7 | 1568 | |
32090b8e KR |
1569 | /* Identify and classify all of the symbols. */ |
1570 | for (idx = 0; idx < symcount; idx++) | |
244ffee7 | 1571 | { |
062189c6 | 1572 | if (!sym_is_global (abfd, syms[idx])) |
32090b8e KR |
1573 | num_locals++; |
1574 | else | |
1575 | num_globals++; | |
244ffee7 | 1576 | } |
32090b8e KR |
1577 | |
1578 | /* Now provide mapping information. Add +1 for skipping over the | |
1579 | dummy symbol. */ | |
1580 | for (idx = 0; idx < symcount; idx++) | |
244ffee7 | 1581 | { |
1c6042ee | 1582 | syms[idx]->udata = (PTR) & sym_extra[idx]; |
062189c6 | 1583 | if (!sym_is_global (abfd, syms[idx])) |
d24928c0 | 1584 | sym_extra[idx].elf_sym_num = 1 + num_locals2++; |
32090b8e | 1585 | else |
d24928c0 | 1586 | sym_extra[idx].elf_sym_num = 1 + num_locals + num_globals2++; |
244ffee7 JK |
1587 | } |
1588 | ||
32090b8e KR |
1589 | elf_num_locals (abfd) = num_locals; |
1590 | elf_num_globals (abfd) = num_globals; | |
9783e04a | 1591 | return true; |
32090b8e | 1592 | } |
244ffee7 | 1593 | |
6ec3bb6a ILT |
1594 | /* Compute the file positions we are going to put the sections at, and |
1595 | otherwise prepare to begin writing out the ELF file. If LINK_INFO | |
1596 | is not NULL, this is being called by the ELF backend linker. */ | |
244ffee7 | 1597 | |
32090b8e | 1598 | static boolean |
6ec3bb6a | 1599 | elf_compute_section_file_positions (abfd, link_info) |
1c6042ee | 1600 | bfd *abfd; |
6ec3bb6a | 1601 | struct bfd_link_info *link_info; |
32090b8e | 1602 | { |
6ec3bb6a ILT |
1603 | struct elf_backend_data *bed = get_elf_backend_data (abfd); |
1604 | Elf_Internal_Shdr *shstrtab_hdr; | |
1605 | ||
1606 | if (abfd->output_has_begun) | |
1607 | return true; | |
1608 | ||
1609 | /* Do any elf backend specific processing first. */ | |
1610 | if (bed->elf_backend_begin_write_processing) | |
71edd06d | 1611 | (*bed->elf_backend_begin_write_processing) (abfd, link_info); |
6ec3bb6a ILT |
1612 | |
1613 | if (! prep_headers (abfd)) | |
1614 | return false; | |
1615 | ||
32090b8e | 1616 | bfd_map_over_sections (abfd, elf_fake_sections, 0); |
244ffee7 | 1617 | |
9783e04a DM |
1618 | if (!assign_section_numbers (abfd)) |
1619 | return false; | |
244ffee7 | 1620 | |
6ec3bb6a ILT |
1621 | /* The backend linker builds symbol table information itself. */ |
1622 | if (link_info == NULL) | |
1623 | { | |
1624 | if (! swap_out_syms (abfd)) | |
1625 | return false; | |
1626 | } | |
244ffee7 | 1627 | |
6ec3bb6a ILT |
1628 | shstrtab_hdr = &elf_tdata (abfd)->shstrtab_hdr; |
1629 | /* sh_name was set in prep_headers. */ | |
1630 | shstrtab_hdr->sh_type = SHT_STRTAB; | |
1631 | shstrtab_hdr->sh_flags = 0; | |
1632 | shstrtab_hdr->sh_addr = 0; | |
1633 | shstrtab_hdr->sh_size = elf_shstrtab (abfd)->length; | |
1634 | shstrtab_hdr->sh_entsize = 0; | |
1635 | shstrtab_hdr->sh_link = 0; | |
1636 | shstrtab_hdr->sh_info = 0; | |
1637 | /* sh_offset is set in assign_file_positions_for_symtabs_and_strtabs. */ | |
1638 | shstrtab_hdr->sh_addralign = 1; | |
1639 | shstrtab_hdr->contents = (PTR) elf_shstrtab (abfd)->tab; | |
1640 | ||
1641 | if (!assign_file_positions_except_relocs (abfd, | |
1642 | link_info == NULL ? true : false)) | |
9783e04a | 1643 | return false; |
32090b8e | 1644 | |
6ec3bb6a ILT |
1645 | abfd->output_has_begun = true; |
1646 | ||
32090b8e KR |
1647 | return true; |
1648 | } | |
1649 | ||
244ffee7 | 1650 | |
013dec1a ILT |
1651 | /* Align to the maximum file alignment that could be required for any |
1652 | ELF data structure. */ | |
1653 | ||
1654 | static INLINE file_ptr | |
1655 | align_file_position (off) | |
1656 | file_ptr off; | |
1657 | { | |
1658 | return (off + FILE_ALIGN - 1) & ~(FILE_ALIGN - 1); | |
1659 | } | |
1660 | ||
1661 | /* Assign a file position to a section, optionally aligning to the | |
1662 | required section alignment. */ | |
1663 | ||
32090b8e | 1664 | static INLINE file_ptr |
013dec1a | 1665 | assign_file_position_for_section (i_shdrp, offset, align) |
32090b8e KR |
1666 | Elf_Internal_Shdr *i_shdrp; |
1667 | file_ptr offset; | |
013dec1a | 1668 | boolean align; |
32090b8e | 1669 | { |
013dec1a ILT |
1670 | if (align) |
1671 | { | |
1672 | unsigned int al; | |
f035cc47 | 1673 | |
013dec1a ILT |
1674 | al = i_shdrp->sh_addralign; |
1675 | if (al > 1) | |
1676 | offset = BFD_ALIGN (offset, al); | |
1677 | } | |
1678 | i_shdrp->sh_offset = offset; | |
7b8106b4 ILT |
1679 | if (i_shdrp->rawdata != NULL) |
1680 | ((asection *) i_shdrp->rawdata)->filepos = offset; | |
300adb31 KR |
1681 | if (i_shdrp->sh_type != SHT_NOBITS) |
1682 | offset += i_shdrp->sh_size; | |
32090b8e | 1683 | return offset; |
244ffee7 JK |
1684 | } |
1685 | ||
013dec1a ILT |
1686 | /* Get the size of the program header. This is called by the linker |
1687 | before any of the section VMA's are set, so it can't calculate the | |
1688 | correct value for a strange memory layout. */ | |
01383fb4 | 1689 | |
013dec1a ILT |
1690 | static bfd_size_type |
1691 | get_program_header_size (abfd) | |
300adb31 | 1692 | bfd *abfd; |
300adb31 | 1693 | { |
013dec1a ILT |
1694 | size_t segs; |
1695 | asection *s; | |
300adb31 | 1696 | |
013dec1a ILT |
1697 | /* Assume we will need exactly two PT_LOAD segments: one for text |
1698 | and one for data. */ | |
1699 | segs = 2; | |
1700 | ||
1701 | s = bfd_get_section_by_name (abfd, ".interp"); | |
1702 | if (s != NULL && (s->flags & SEC_LOAD) != 0) | |
1703 | { | |
1704 | /* If we have a loadable interpreter section, we need a | |
1705 | PT_INTERP segment. In this case, assume we also need a | |
1706 | PT_PHDR segment, although that may not be true for all | |
1707 | targets. */ | |
1708 | segs += 2; | |
1709 | } | |
1710 | ||
1711 | if (bfd_get_section_by_name (abfd, ".dynamic") != NULL) | |
1712 | { | |
1713 | /* We need a PT_DYNAMIC segment. */ | |
1714 | ++segs; | |
1715 | } | |
1716 | ||
1717 | return segs * sizeof (Elf_External_Phdr); | |
300adb31 KR |
1718 | } |
1719 | ||
013dec1a ILT |
1720 | /* Create the program header. OFF is the file offset where the |
1721 | program header should be written. FIRST is the first loadable ELF | |
1722 | section. PHDR_SIZE is the size of the program header as returned | |
1723 | by get_program_header_size. */ | |
300adb31 | 1724 | |
013dec1a ILT |
1725 | static file_ptr |
1726 | map_program_segments (abfd, off, first, phdr_size) | |
300adb31 | 1727 | bfd *abfd; |
013dec1a ILT |
1728 | file_ptr off; |
1729 | Elf_Internal_Shdr *first; | |
1730 | bfd_size_type phdr_size; | |
300adb31 | 1731 | { |
6731b89c | 1732 | Elf_Internal_Phdr phdrs[10]; |
013dec1a | 1733 | unsigned int phdr_count; |
300adb31 | 1734 | Elf_Internal_Phdr *phdr; |
013dec1a ILT |
1735 | int phdr_size_adjust; |
1736 | unsigned int i; | |
1737 | Elf_Internal_Shdr **hdrpp; | |
1738 | asection *sinterp, *sdyn; | |
1739 | unsigned int last_type; | |
1740 | Elf_Internal_Ehdr *i_ehdrp; | |
1741 | ||
1742 | BFD_ASSERT ((abfd->flags & EXEC_P) != 0); | |
6731b89c ILT |
1743 | BFD_ASSERT (phdr_size / sizeof (Elf_Internal_Phdr) |
1744 | <= sizeof phdrs / sizeof (phdrs[0])); | |
013dec1a ILT |
1745 | |
1746 | phdr_count = 0; | |
1747 | phdr = phdrs; | |
1748 | ||
1749 | phdr_size_adjust = 0; | |
300adb31 | 1750 | |
013dec1a ILT |
1751 | /* If we have a loadable .interp section, we must create a PT_INTERP |
1752 | segment which must precede all PT_LOAD segments. We assume that | |
1753 | we must also create a PT_PHDR segment, although that may not be | |
1754 | true for all targets. */ | |
1755 | sinterp = bfd_get_section_by_name (abfd, ".interp"); | |
1756 | if (sinterp != NULL && (sinterp->flags & SEC_LOAD) != 0) | |
80425e6c | 1757 | { |
013dec1a ILT |
1758 | BFD_ASSERT (first != NULL); |
1759 | ||
1760 | phdr->p_type = PT_PHDR; | |
1761 | ||
1762 | phdr->p_offset = off; | |
1763 | ||
1764 | /* Account for any adjustment made because of the alignment of | |
1765 | the first loadable section. */ | |
1766 | phdr_size_adjust = (first->sh_offset - phdr_size) - off; | |
1767 | BFD_ASSERT (phdr_size_adjust >= 0 && phdr_size_adjust < 128); | |
1768 | ||
1769 | /* The program header precedes all loadable sections. This lets | |
1770 | us compute its loadable address. This depends on the linker | |
1771 | script. */ | |
1772 | phdr->p_vaddr = first->sh_addr - (phdr_size + phdr_size_adjust); | |
1773 | ||
1774 | phdr->p_paddr = 0; | |
1775 | phdr->p_filesz = phdr_size; | |
1776 | phdr->p_memsz = phdr_size; | |
1777 | ||
1778 | /* FIXME: UnixWare and Solaris set PF_X, Irix 5 does not. */ | |
1779 | phdr->p_flags = PF_R | PF_X; | |
1780 | ||
1781 | phdr->p_align = FILE_ALIGN; | |
1782 | BFD_ASSERT ((phdr->p_vaddr - phdr->p_offset) % FILE_ALIGN == 0); | |
1783 | ||
1784 | /* Include the ELF header in the first loadable segment. */ | |
1785 | phdr_size_adjust += off; | |
1786 | ||
1787 | ++phdr_count; | |
1788 | ++phdr; | |
1789 | ||
1790 | phdr->p_type = PT_INTERP; | |
1791 | phdr->p_offset = sinterp->filepos; | |
1792 | phdr->p_vaddr = sinterp->vma; | |
1793 | phdr->p_paddr = 0; | |
1794 | phdr->p_filesz = sinterp->_raw_size; | |
1795 | phdr->p_memsz = sinterp->_raw_size; | |
1796 | phdr->p_flags = PF_R; | |
1797 | phdr->p_align = 1 << bfd_get_section_alignment (abfd, sinterp); | |
1798 | ||
1799 | ++phdr_count; | |
1800 | ++phdr; | |
80425e6c | 1801 | } |
013dec1a ILT |
1802 | |
1803 | /* Look through the sections to see how they will be divided into | |
1804 | program segments. The sections must be arranged in order by | |
1805 | sh_addr for this to work correctly. */ | |
1806 | phdr->p_type = PT_NULL; | |
1807 | last_type = SHT_PROGBITS; | |
1808 | for (i = 1, hdrpp = elf_elfsections (abfd) + 1; | |
1809 | i < elf_elfheader (abfd)->e_shnum; | |
1810 | i++, hdrpp++) | |
300adb31 | 1811 | { |
013dec1a ILT |
1812 | Elf_Internal_Shdr *hdr; |
1813 | ||
1814 | hdr = *hdrpp; | |
1815 | ||
1816 | /* Ignore any section which will not be part of the process | |
1817 | image. */ | |
1818 | if ((hdr->sh_flags & SHF_ALLOC) == 0) | |
1819 | continue; | |
1820 | ||
1821 | /* If this section fits in the segment we are constructing, add | |
1822 | it in. */ | |
1823 | if (phdr->p_type != PT_NULL | |
1824 | && (hdr->sh_offset - (phdr->p_offset + phdr->p_memsz) | |
1825 | == hdr->sh_addr - (phdr->p_vaddr + phdr->p_memsz)) | |
1826 | && (last_type != SHT_NOBITS || hdr->sh_type == SHT_NOBITS)) | |
300adb31 | 1827 | { |
013dec1a ILT |
1828 | bfd_size_type adjust; |
1829 | ||
1830 | adjust = hdr->sh_addr - (phdr->p_vaddr + phdr->p_memsz); | |
1831 | phdr->p_memsz += hdr->sh_size + adjust; | |
1832 | if (hdr->sh_type != SHT_NOBITS) | |
1833 | phdr->p_filesz += hdr->sh_size + adjust; | |
1834 | if ((hdr->sh_flags & SHF_WRITE) != 0) | |
1835 | phdr->p_flags |= PF_W; | |
1836 | if ((hdr->sh_flags & SHF_EXECINSTR) != 0) | |
1837 | phdr->p_flags |= PF_X; | |
1838 | last_type = hdr->sh_type; | |
300adb31 KR |
1839 | continue; |
1840 | } | |
300adb31 | 1841 | |
013dec1a ILT |
1842 | /* If we have a segment, move to the next one. */ |
1843 | if (phdr->p_type != PT_NULL) | |
300adb31 | 1844 | { |
013dec1a ILT |
1845 | ++phdr; |
1846 | ++phdr_count; | |
300adb31 | 1847 | } |
013dec1a ILT |
1848 | |
1849 | /* Start a new segment. */ | |
1850 | phdr->p_type = PT_LOAD; | |
1851 | phdr->p_offset = hdr->sh_offset; | |
1852 | phdr->p_vaddr = hdr->sh_addr; | |
1853 | phdr->p_paddr = 0; | |
1854 | if (hdr->sh_type == SHT_NOBITS) | |
1855 | phdr->p_filesz = 0; | |
1856 | else | |
1857 | phdr->p_filesz = hdr->sh_size; | |
1858 | phdr->p_memsz = hdr->sh_size; | |
1859 | phdr->p_flags = PF_R; | |
1860 | if ((hdr->sh_flags & SHF_WRITE) != 0) | |
1861 | phdr->p_flags |= PF_W; | |
1862 | if ((hdr->sh_flags & SHF_EXECINSTR) != 0) | |
1863 | phdr->p_flags |= PF_X; | |
1864 | phdr->p_align = get_elf_backend_data (abfd)->maxpagesize; | |
1865 | ||
1866 | if (hdr == first | |
1867 | && sinterp != NULL | |
1868 | && (sinterp->flags & SEC_LOAD) != 0) | |
2f3189e7 | 1869 | { |
013dec1a ILT |
1870 | phdr->p_offset -= phdr_size + phdr_size_adjust; |
1871 | phdr->p_vaddr -= phdr_size + phdr_size_adjust; | |
1872 | phdr->p_filesz += phdr_size + phdr_size_adjust; | |
1873 | phdr->p_memsz += phdr_size + phdr_size_adjust; | |
2f3189e7 | 1874 | } |
300adb31 | 1875 | |
013dec1a | 1876 | last_type = hdr->sh_type; |
300adb31 | 1877 | } |
300adb31 | 1878 | |
013dec1a ILT |
1879 | if (phdr->p_type != PT_NULL) |
1880 | { | |
1881 | ++phdr; | |
1882 | ++phdr_count; | |
1883 | } | |
1884 | ||
1885 | /* If we have a .dynamic section, create a PT_DYNAMIC segment. */ | |
1886 | sdyn = bfd_get_section_by_name (abfd, ".dynamic"); | |
1887 | if (sdyn != NULL && (sdyn->flags & SEC_LOAD) != 0) | |
1888 | { | |
1889 | phdr->p_type = PT_DYNAMIC; | |
1890 | phdr->p_offset = sdyn->filepos; | |
1891 | phdr->p_vaddr = sdyn->vma; | |
1892 | phdr->p_paddr = 0; | |
1893 | phdr->p_filesz = sdyn->_raw_size; | |
1894 | phdr->p_memsz = sdyn->_raw_size; | |
1895 | phdr->p_flags = PF_R; | |
1896 | if ((sdyn->flags & SEC_READONLY) == 0) | |
1897 | phdr->p_flags |= PF_W; | |
1898 | if ((sdyn->flags & SEC_CODE) != 0) | |
1899 | phdr->p_flags |= PF_X; | |
1900 | phdr->p_align = 1 << bfd_get_section_alignment (abfd, sdyn); | |
1901 | ||
1902 | ++phdr; | |
1903 | ++phdr_count; | |
1904 | } | |
1905 | ||
013dec1a ILT |
1906 | /* Make sure the return value from get_program_header_size matches |
1907 | what we computed here. */ | |
5315c428 | 1908 | if (phdr_count != phdr_size / sizeof (Elf_External_Phdr)) |
013dec1a ILT |
1909 | abort (); |
1910 | ||
1911 | /* Set up program header information. */ | |
1912 | i_ehdrp = elf_elfheader (abfd); | |
1913 | i_ehdrp->e_phentsize = sizeof (Elf_External_Phdr); | |
1914 | i_ehdrp->e_phoff = off; | |
1915 | i_ehdrp->e_phnum = phdr_count; | |
1916 | ||
1917 | /* Save the program headers away. I don't think anybody uses this | |
1918 | information right now. */ | |
1919 | elf_tdata (abfd)->phdr = ((Elf_Internal_Phdr *) | |
1920 | bfd_alloc (abfd, | |
1921 | (phdr_count | |
1922 | * sizeof (Elf_Internal_Phdr)))); | |
1923 | if (elf_tdata (abfd)->phdr == NULL && phdr_count != 0) | |
1924 | { | |
1925 | bfd_set_error (bfd_error_no_memory); | |
1926 | return (file_ptr) -1; | |
1927 | } | |
1928 | memcpy (elf_tdata (abfd)->phdr, phdrs, | |
1929 | phdr_count * sizeof (Elf_Internal_Phdr)); | |
1930 | ||
1931 | /* Write out the program headers. */ | |
1932 | if (bfd_seek (abfd, off, SEEK_SET) != 0) | |
1933 | return (file_ptr) -1; | |
1934 | ||
1935 | for (i = 0, phdr = phdrs; i < phdr_count; i++, phdr++) | |
1936 | { | |
1937 | Elf_External_Phdr extphdr; | |
1938 | ||
1939 | elf_swap_phdr_out (abfd, phdr, &extphdr); | |
1940 | if (bfd_write (&extphdr, sizeof (Elf_External_Phdr), 1, abfd) | |
1941 | != sizeof (Elf_External_Phdr)) | |
1942 | return (file_ptr) -1; | |
1943 | } | |
1944 | ||
1945 | return off + phdr_count * sizeof (Elf_External_Phdr); | |
300adb31 KR |
1946 | } |
1947 | ||
013dec1a ILT |
1948 | /* Work out the file positions of all the sections. This is called by |
1949 | elf_compute_section_file_positions. All the section sizes and VMAs | |
1950 | must be known before this is called. | |
1951 | ||
1952 | We do not consider reloc sections at this point, unless they form | |
1953 | part of the loadable image. Reloc sections are assigned file | |
1954 | positions in assign_file_positions_for_relocs, which is called by | |
1955 | write_object_contents and final_link. | |
1956 | ||
1957 | If DOSYMS is false, we do not assign file positions for the symbol | |
1958 | table or the string table. */ | |
1959 | ||
9783e04a | 1960 | static boolean |
6ec3bb6a | 1961 | assign_file_positions_except_relocs (abfd, dosyms) |
32090b8e | 1962 | bfd *abfd; |
6ec3bb6a | 1963 | boolean dosyms; |
244ffee7 | 1964 | { |
013dec1a ILT |
1965 | struct elf_obj_tdata * const tdata = elf_tdata (abfd); |
1966 | Elf_Internal_Ehdr * const i_ehdrp = elf_elfheader (abfd); | |
1967 | Elf_Internal_Shdr ** const i_shdrpp = elf_elfsections (abfd); | |
32090b8e | 1968 | file_ptr off; |
32090b8e | 1969 | |
013dec1a | 1970 | /* Start after the ELF header. */ |
32090b8e | 1971 | off = i_ehdrp->e_ehsize; |
300adb31 | 1972 | |
013dec1a | 1973 | if ((abfd->flags & EXEC_P) == 0) |
300adb31 | 1974 | { |
013dec1a ILT |
1975 | Elf_Internal_Shdr **hdrpp; |
1976 | unsigned int i; | |
062189c6 | 1977 | |
013dec1a ILT |
1978 | /* We are not creating an executable, which means that we are |
1979 | not creating a program header, and that the actual order of | |
1980 | the sections in the file is unimportant. */ | |
1981 | for (i = 1, hdrpp = i_shdrpp + 1; i < i_ehdrp->e_shnum; i++, hdrpp++) | |
244ffee7 | 1982 | { |
013dec1a ILT |
1983 | Elf_Internal_Shdr *hdr; |
1984 | ||
1985 | hdr = *hdrpp; | |
1986 | if (hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA) | |
300adb31 | 1987 | { |
013dec1a | 1988 | hdr->sh_offset = -1; |
300adb31 KR |
1989 | continue; |
1990 | } | |
013dec1a ILT |
1991 | if (! dosyms |
1992 | && (i == tdata->symtab_section | |
1993 | || i == tdata->strtab_section)) | |
300adb31 | 1994 | { |
013dec1a ILT |
1995 | hdr->sh_offset = -1; |
1996 | continue; | |
300adb31 | 1997 | } |
013dec1a ILT |
1998 | |
1999 | off = assign_file_position_for_section (hdr, off, true); | |
300adb31 | 2000 | } |
300adb31 | 2001 | } |
013dec1a | 2002 | else |
300adb31 | 2003 | { |
013dec1a ILT |
2004 | file_ptr phdr_off; |
2005 | bfd_size_type phdr_size; | |
2006 | bfd_vma maxpagesize; | |
2007 | Elf_Internal_Shdr **hdrpp; | |
2008 | unsigned int i; | |
2009 | Elf_Internal_Shdr *first; | |
2010 | file_ptr phdr_map; | |
2011 | ||
2012 | /* We are creating an executable. We must create a program | |
2013 | header. We can't actually create the program header until we | |
2014 | have set the file positions for the sections, but we can | |
2015 | figure out how big it is going to be. */ | |
2016 | off = align_file_position (off); | |
2017 | phdr_size = get_program_header_size (abfd); | |
2018 | if (phdr_size == (file_ptr) -1) | |
9783e04a | 2019 | return false; |
013dec1a ILT |
2020 | phdr_off = off; |
2021 | off += phdr_size; | |
2022 | ||
2023 | maxpagesize = get_elf_backend_data (abfd)->maxpagesize; | |
2024 | if (maxpagesize == 0) | |
2025 | maxpagesize = 1; | |
2026 | ||
2027 | /* FIXME: We might want to sort the sections on the sh_addr | |
2028 | field here. For now, we just assume that the linker will | |
2029 | create the sections in an appropriate order. */ | |
2030 | ||
2031 | /* Assign file positions in two passes. In the first pass, we | |
2032 | assign a file position to every section which forms part of | |
2033 | the executable image. */ | |
2034 | first = NULL; | |
2035 | for (i = 1, hdrpp = i_shdrpp + 1; i < i_ehdrp->e_shnum; i++, hdrpp++) | |
2036 | { | |
2037 | Elf_Internal_Shdr *hdr; | |
300adb31 | 2038 | |
013dec1a ILT |
2039 | hdr = *hdrpp; |
2040 | if ((hdr->sh_flags & SHF_ALLOC) == 0) | |
2041 | continue; | |
2042 | ||
2043 | if (first == NULL) | |
2044 | first = hdr; | |
2045 | ||
2046 | if ((abfd->flags & D_PAGED) != 0) | |
2047 | { | |
2048 | /* The section VMA must equal the file position modulo | |
2049 | the page size. This is required by the program | |
2050 | header. */ | |
2051 | off += (hdr->sh_addr - off) % maxpagesize; | |
2052 | } | |
300adb31 | 2053 | |
013dec1a ILT |
2054 | off = assign_file_position_for_section (hdr, off, false); |
2055 | } | |
300adb31 | 2056 | |
013dec1a ILT |
2057 | /* Assign file positions to all the sections which do not form |
2058 | part of the loadable image, except for the relocs. */ | |
2059 | for (i = 1, hdrpp = i_shdrpp + 1; i < i_ehdrp->e_shnum; i++, hdrpp++) | |
300adb31 | 2060 | { |
013dec1a ILT |
2061 | Elf_Internal_Shdr *hdr; |
2062 | ||
2063 | hdr = *hdrpp; | |
2064 | if ((hdr->sh_flags & SHF_ALLOC) != 0) | |
2065 | continue; | |
2066 | if (hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA) | |
2067 | { | |
2068 | hdr->sh_offset = -1; | |
2069 | continue; | |
2070 | } | |
2071 | if (! dosyms | |
2072 | && (i == tdata->symtab_section | |
2073 | || i == tdata->strtab_section)) | |
2074 | { | |
2075 | hdr->sh_offset = -1; | |
2076 | continue; | |
2077 | } | |
2078 | ||
2079 | off = assign_file_position_for_section (hdr, off, true); | |
300adb31 | 2080 | } |
013dec1a ILT |
2081 | |
2082 | phdr_map = map_program_segments (abfd, phdr_off, first, phdr_size); | |
2083 | if (phdr_map == (file_ptr) -1) | |
2084 | return false; | |
2085 | BFD_ASSERT (phdr_map == phdr_off + phdr_size); | |
244ffee7 | 2086 | } |
013dec1a ILT |
2087 | |
2088 | /* Place the section headers. */ | |
2089 | off = align_file_position (off); | |
2090 | i_ehdrp->e_shoff = off; | |
2091 | off += i_ehdrp->e_shnum * i_ehdrp->e_shentsize; | |
2092 | ||
32090b8e | 2093 | elf_tdata (abfd)->next_file_pos = off; |
013dec1a | 2094 | |
9783e04a | 2095 | return true; |
244ffee7 JK |
2096 | } |
2097 | ||
32090b8e KR |
2098 | static boolean |
2099 | prep_headers (abfd) | |
2100 | bfd *abfd; | |
2101 | { | |
32090b8e | 2102 | Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */ |
1c6042ee | 2103 | Elf_Internal_Phdr *i_phdrp = 0; /* Program header table, internal form */ |
32090b8e | 2104 | Elf_Internal_Shdr **i_shdrp; /* Section header table, internal form */ |
32090b8e | 2105 | int count; |
32090b8e | 2106 | struct strtab *shstrtab; |
244ffee7 | 2107 | |
32090b8e KR |
2108 | i_ehdrp = elf_elfheader (abfd); |
2109 | i_shdrp = elf_elfsections (abfd); | |
244ffee7 | 2110 | |
32090b8e | 2111 | shstrtab = bfd_new_strtab (abfd); |
b9d5cdf0 DM |
2112 | if (!shstrtab) |
2113 | return false; | |
1c6042ee | 2114 | |
32090b8e | 2115 | elf_shstrtab (abfd) = shstrtab; |
244ffee7 | 2116 | |
32090b8e KR |
2117 | i_ehdrp->e_ident[EI_MAG0] = ELFMAG0; |
2118 | i_ehdrp->e_ident[EI_MAG1] = ELFMAG1; | |
2119 | i_ehdrp->e_ident[EI_MAG2] = ELFMAG2; | |
2120 | i_ehdrp->e_ident[EI_MAG3] = ELFMAG3; | |
244ffee7 | 2121 | |
32090b8e KR |
2122 | i_ehdrp->e_ident[EI_CLASS] = ELFCLASS; |
2123 | i_ehdrp->e_ident[EI_DATA] = | |
2124 | abfd->xvec->byteorder_big_p ? ELFDATA2MSB : ELFDATA2LSB; | |
2125 | i_ehdrp->e_ident[EI_VERSION] = EV_CURRENT; | |
244ffee7 | 2126 | |
32090b8e KR |
2127 | for (count = EI_PAD; count < EI_NIDENT; count++) |
2128 | i_ehdrp->e_ident[count] = 0; | |
244ffee7 | 2129 | |
8af74670 ILT |
2130 | if ((abfd->flags & DYNAMIC) != 0) |
2131 | i_ehdrp->e_type = ET_DYN; | |
2132 | else if ((abfd->flags & EXEC_P) != 0) | |
2133 | i_ehdrp->e_type = ET_EXEC; | |
2134 | else | |
2135 | i_ehdrp->e_type = ET_REL; | |
2136 | ||
32090b8e | 2137 | switch (bfd_get_arch (abfd)) |
fce36137 | 2138 | { |
32090b8e KR |
2139 | case bfd_arch_unknown: |
2140 | i_ehdrp->e_machine = EM_NONE; | |
2141 | break; | |
2142 | case bfd_arch_sparc: | |
32090b8e KR |
2143 | #if ARCH_SIZE == 64 |
2144 | i_ehdrp->e_machine = EM_SPARC64; | |
5546cc7e KR |
2145 | #else |
2146 | i_ehdrp->e_machine = EM_SPARC; | |
32090b8e | 2147 | #endif |
32090b8e KR |
2148 | break; |
2149 | case bfd_arch_i386: | |
2150 | i_ehdrp->e_machine = EM_386; | |
2151 | break; | |
2152 | case bfd_arch_m68k: | |
2153 | i_ehdrp->e_machine = EM_68K; | |
2154 | break; | |
2155 | case bfd_arch_m88k: | |
2156 | i_ehdrp->e_machine = EM_88K; | |
2157 | break; | |
2158 | case bfd_arch_i860: | |
2159 | i_ehdrp->e_machine = EM_860; | |
2160 | break; | |
2161 | case bfd_arch_mips: /* MIPS Rxxxx */ | |
2162 | i_ehdrp->e_machine = EM_MIPS; /* only MIPS R3000 */ | |
2163 | break; | |
2164 | case bfd_arch_hppa: | |
459ae909 | 2165 | i_ehdrp->e_machine = EM_PARISC; |
32090b8e | 2166 | break; |
99ec1f66 ILT |
2167 | case bfd_arch_powerpc: |
2168 | i_ehdrp->e_machine = EM_CYGNUS_POWERPC; | |
2169 | break; | |
32090b8e KR |
2170 | /* also note that EM_M32, AT&T WE32100 is unknown to bfd */ |
2171 | default: | |
2172 | i_ehdrp->e_machine = EM_NONE; | |
fce36137 | 2173 | } |
32090b8e KR |
2174 | i_ehdrp->e_version = EV_CURRENT; |
2175 | i_ehdrp->e_ehsize = sizeof (Elf_External_Ehdr); | |
244ffee7 | 2176 | |
32090b8e KR |
2177 | /* no program header, for now. */ |
2178 | i_ehdrp->e_phoff = 0; | |
2179 | i_ehdrp->e_phentsize = 0; | |
2180 | i_ehdrp->e_phnum = 0; | |
244ffee7 | 2181 | |
32090b8e KR |
2182 | /* each bfd section is section header entry */ |
2183 | i_ehdrp->e_entry = bfd_get_start_address (abfd); | |
2184 | i_ehdrp->e_shentsize = sizeof (Elf_External_Shdr); | |
244ffee7 | 2185 | |
32090b8e KR |
2186 | /* if we're building an executable, we'll need a program header table */ |
2187 | if (abfd->flags & EXEC_P) | |
244ffee7 | 2188 | { |
300adb31 | 2189 | /* it all happens later */ |
32090b8e KR |
2190 | #if 0 |
2191 | i_ehdrp->e_phentsize = sizeof (Elf_External_Phdr); | |
244ffee7 | 2192 | |
32090b8e KR |
2193 | /* elf_build_phdrs() returns a (NULL-terminated) array of |
2194 | Elf_Internal_Phdrs */ | |
2195 | i_phdrp = elf_build_phdrs (abfd, i_ehdrp, i_shdrp, &i_ehdrp->e_phnum); | |
2196 | i_ehdrp->e_phoff = outbase; | |
2197 | outbase += i_ehdrp->e_phentsize * i_ehdrp->e_phnum; | |
2198 | #endif | |
244ffee7 | 2199 | } |
32090b8e | 2200 | else |
244ffee7 | 2201 | { |
32090b8e KR |
2202 | i_ehdrp->e_phentsize = 0; |
2203 | i_phdrp = 0; | |
2204 | i_ehdrp->e_phoff = 0; | |
244ffee7 JK |
2205 | } |
2206 | ||
32090b8e KR |
2207 | elf_tdata (abfd)->symtab_hdr.sh_name = bfd_add_to_strtab (abfd, shstrtab, |
2208 | ".symtab"); | |
2209 | elf_tdata (abfd)->strtab_hdr.sh_name = bfd_add_to_strtab (abfd, shstrtab, | |
2210 | ".strtab"); | |
2211 | elf_tdata (abfd)->shstrtab_hdr.sh_name = bfd_add_to_strtab (abfd, shstrtab, | |
2212 | ".shstrtab"); | |
6ec3bb6a ILT |
2213 | if (elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1 |
2214 | || elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1 | |
2215 | || elf_tdata (abfd)->shstrtab_hdr.sh_name == (unsigned int) -1) | |
2216 | return false; | |
2217 | ||
f035cc47 | 2218 | return true; |
244ffee7 JK |
2219 | } |
2220 | ||
b9d5cdf0 | 2221 | static boolean |
32090b8e KR |
2222 | swap_out_syms (abfd) |
2223 | bfd *abfd; | |
244ffee7 | 2224 | { |
9783e04a DM |
2225 | if (!elf_map_symbols (abfd)) |
2226 | return false; | |
244ffee7 | 2227 | |
32090b8e KR |
2228 | /* Dump out the symtabs. */ |
2229 | { | |
2230 | int symcount = bfd_get_symcount (abfd); | |
2231 | asymbol **syms = bfd_get_outsymbols (abfd); | |
2232 | struct strtab *stt = bfd_new_strtab (abfd); | |
2233 | Elf_Internal_Shdr *symtab_hdr; | |
2234 | Elf_Internal_Shdr *symstrtab_hdr; | |
2235 | Elf_External_Sym *outbound_syms; | |
2236 | int idx; | |
244ffee7 | 2237 | |
b9d5cdf0 DM |
2238 | if (!stt) |
2239 | return false; | |
32090b8e KR |
2240 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
2241 | symtab_hdr->sh_type = SHT_SYMTAB; | |
2242 | symtab_hdr->sh_entsize = sizeof (Elf_External_Sym); | |
2243 | symtab_hdr->sh_size = symtab_hdr->sh_entsize * (symcount + 1); | |
2244 | symtab_hdr->sh_info = elf_num_locals (abfd) + 1; | |
fa15568a | 2245 | symtab_hdr->sh_addralign = FILE_ALIGN; |
244ffee7 | 2246 | |
32090b8e KR |
2247 | symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr; |
2248 | symstrtab_hdr->sh_type = SHT_STRTAB; | |
244ffee7 | 2249 | |
32090b8e KR |
2250 | outbound_syms = (Elf_External_Sym *) |
2251 | bfd_alloc (abfd, (1 + symcount) * sizeof (Elf_External_Sym)); | |
9783e04a DM |
2252 | if (!outbound_syms) |
2253 | { | |
d1ad85a6 | 2254 | bfd_set_error (bfd_error_no_memory); |
9783e04a DM |
2255 | return false; |
2256 | } | |
32090b8e KR |
2257 | /* now generate the data (for "contents") */ |
2258 | { | |
2259 | /* Fill in zeroth symbol and swap it out. */ | |
2260 | Elf_Internal_Sym sym; | |
2261 | sym.st_name = 0; | |
2262 | sym.st_value = 0; | |
2263 | sym.st_size = 0; | |
2264 | sym.st_info = 0; | |
2265 | sym.st_other = 0; | |
2266 | sym.st_shndx = SHN_UNDEF; | |
2267 | elf_swap_symbol_out (abfd, &sym, outbound_syms); | |
244ffee7 | 2268 | } |
32090b8e KR |
2269 | for (idx = 0; idx < symcount; idx++) |
2270 | { | |
2271 | Elf_Internal_Sym sym; | |
2272 | bfd_vma value = syms[idx]->value; | |
71edd06d | 2273 | elf_symbol_type *type_ptr; |
244ffee7 | 2274 | |
32090b8e KR |
2275 | if (syms[idx]->flags & BSF_SECTION_SYM) |
2276 | /* Section symbols have no names. */ | |
2277 | sym.st_name = 0; | |
2278 | else | |
6ec3bb6a ILT |
2279 | { |
2280 | sym.st_name = bfd_add_to_strtab (abfd, stt, syms[idx]->name); | |
2281 | if (sym.st_name == (unsigned long) -1) | |
2282 | return false; | |
2283 | } | |
244ffee7 | 2284 | |
71edd06d ILT |
2285 | type_ptr = elf_symbol_from (abfd, syms[idx]); |
2286 | ||
32090b8e | 2287 | if (bfd_is_com_section (syms[idx]->section)) |
244ffee7 | 2288 | { |
32090b8e KR |
2289 | /* ELF common symbols put the alignment into the `value' field, |
2290 | and the size into the `size' field. This is backwards from | |
2291 | how BFD handles it, so reverse it here. */ | |
2292 | sym.st_size = value; | |
71edd06d | 2293 | sym.st_value = type_ptr ? type_ptr->internal_elf_sym.st_value : 16; |
d4fb8fce ILT |
2294 | sym.st_shndx = elf_section_from_bfd_section (abfd, |
2295 | syms[idx]->section); | |
244ffee7 JK |
2296 | } |
2297 | else | |
2298 | { | |
32090b8e KR |
2299 | asection *sec = syms[idx]->section; |
2300 | int shndx; | |
244ffee7 | 2301 | |
32090b8e KR |
2302 | if (sec->output_section) |
2303 | { | |
2304 | value += sec->output_offset; | |
2305 | sec = sec->output_section; | |
2306 | } | |
2307 | value += sec->vma; | |
2308 | sym.st_value = value; | |
e74034d8 | 2309 | sym.st_size = type_ptr ? type_ptr->internal_elf_sym.st_size : 0; |
32090b8e KR |
2310 | sym.st_shndx = shndx = elf_section_from_bfd_section (abfd, sec); |
2311 | if (shndx == -1) | |
2312 | { | |
2313 | asection *sec2; | |
2314 | /* Writing this would be a hell of a lot easier if we had | |
2315 | some decent documentation on bfd, and knew what to expect | |
2316 | of the library, and what to demand of applications. For | |
2317 | example, it appears that `objcopy' might not set the | |
2318 | section of a symbol to be a section that is actually in | |
2319 | the output file. */ | |
2320 | sec2 = bfd_get_section_by_name (abfd, sec->name); | |
850584ad | 2321 | BFD_ASSERT (sec2 != 0); |
32090b8e | 2322 | sym.st_shndx = shndx = elf_section_from_bfd_section (abfd, sec2); |
850584ad | 2323 | BFD_ASSERT (shndx != -1); |
32090b8e KR |
2324 | } |
2325 | } | |
244ffee7 | 2326 | |
32090b8e | 2327 | if (bfd_is_com_section (syms[idx]->section)) |
38a5f510 | 2328 | sym.st_info = ELF_ST_INFO (STB_GLOBAL, STT_OBJECT); |
badd23e3 | 2329 | else if (bfd_is_und_section (syms[idx]->section)) |
32090b8e | 2330 | sym.st_info = ELF_ST_INFO (STB_GLOBAL, STT_NOTYPE); |
32090b8e KR |
2331 | else if (syms[idx]->flags & BSF_SECTION_SYM) |
2332 | sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION); | |
2333 | else if (syms[idx]->flags & BSF_FILE) | |
2334 | sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE); | |
d24928c0 | 2335 | else |
32090b8e | 2336 | { |
d24928c0 KR |
2337 | int bind = STB_LOCAL; |
2338 | int type = STT_OBJECT; | |
2339 | unsigned int flags = syms[idx]->flags; | |
2340 | ||
2341 | if (flags & BSF_LOCAL) | |
2342 | bind = STB_LOCAL; | |
2343 | else if (flags & BSF_WEAK) | |
2344 | bind = STB_WEAK; | |
2345 | else if (flags & BSF_GLOBAL) | |
2346 | bind = STB_GLOBAL; | |
2347 | ||
2348 | if (flags & BSF_FUNCTION) | |
2349 | type = STT_FUNC; | |
2350 | ||
2351 | sym.st_info = ELF_ST_INFO (bind, type); | |
32090b8e | 2352 | } |
244ffee7 | 2353 | |
32090b8e KR |
2354 | sym.st_other = 0; |
2355 | elf_swap_symbol_out (abfd, &sym, | |
d24928c0 KR |
2356 | (outbound_syms |
2357 | + elf_sym_extra (abfd)[idx].elf_sym_num)); | |
32090b8e KR |
2358 | } |
2359 | ||
2360 | symtab_hdr->contents = (PTR) outbound_syms; | |
2361 | symstrtab_hdr->contents = (PTR) stt->tab; | |
2362 | symstrtab_hdr->sh_size = stt->length; | |
2363 | symstrtab_hdr->sh_type = SHT_STRTAB; | |
2364 | ||
2365 | symstrtab_hdr->sh_flags = 0; | |
2366 | symstrtab_hdr->sh_addr = 0; | |
2367 | symstrtab_hdr->sh_entsize = 0; | |
2368 | symstrtab_hdr->sh_link = 0; | |
2369 | symstrtab_hdr->sh_info = 0; | |
062189c6 | 2370 | symstrtab_hdr->sh_addralign = 1; |
32090b8e KR |
2371 | symstrtab_hdr->size = 0; |
2372 | } | |
2373 | ||
b9d5cdf0 | 2374 | return true; |
244ffee7 JK |
2375 | } |
2376 | ||
32090b8e KR |
2377 | static boolean |
2378 | write_shdrs_and_ehdr (abfd) | |
2379 | bfd *abfd; | |
244ffee7 | 2380 | { |
32090b8e KR |
2381 | Elf_External_Ehdr x_ehdr; /* Elf file header, external form */ |
2382 | Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */ | |
32090b8e KR |
2383 | Elf_External_Shdr *x_shdrp; /* Section header table, external form */ |
2384 | Elf_Internal_Shdr **i_shdrp; /* Section header table, internal form */ | |
68241b2b | 2385 | unsigned int count; |
32090b8e | 2386 | struct strtab *shstrtab; |
244ffee7 | 2387 | |
32090b8e KR |
2388 | i_ehdrp = elf_elfheader (abfd); |
2389 | i_shdrp = elf_elfsections (abfd); | |
2390 | shstrtab = elf_shstrtab (abfd); | |
2391 | ||
2392 | /* swap the header before spitting it out... */ | |
2393 | ||
2394 | #if DEBUG & 1 | |
2395 | elf_debug_file (i_ehdrp); | |
244ffee7 | 2396 | #endif |
32090b8e | 2397 | elf_swap_ehdr_out (abfd, i_ehdrp, &x_ehdr); |
4002f18a ILT |
2398 | if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0 |
2399 | || (bfd_write ((PTR) & x_ehdr, sizeof (x_ehdr), 1, abfd) | |
2400 | != sizeof (x_ehdr))) | |
2401 | return false; | |
244ffee7 | 2402 | |
32090b8e KR |
2403 | /* at this point we've concocted all the ELF sections... */ |
2404 | x_shdrp = (Elf_External_Shdr *) | |
2405 | bfd_alloc (abfd, sizeof (*x_shdrp) * (i_ehdrp->e_shnum)); | |
2406 | if (!x_shdrp) | |
2407 | { | |
d1ad85a6 | 2408 | bfd_set_error (bfd_error_no_memory); |
32090b8e KR |
2409 | return false; |
2410 | } | |
2411 | ||
2412 | for (count = 0; count < i_ehdrp->e_shnum; count++) | |
2413 | { | |
2414 | #if DEBUG & 2 | |
2415 | elf_debug_section (shstrtab->tab + i_shdrp[count]->sh_name, count, | |
2416 | i_shdrp[count]); | |
244ffee7 | 2417 | #endif |
32090b8e KR |
2418 | elf_swap_shdr_out (abfd, i_shdrp[count], x_shdrp + count); |
2419 | } | |
4002f18a ILT |
2420 | if (bfd_seek (abfd, (file_ptr) i_ehdrp->e_shoff, SEEK_SET) != 0 |
2421 | || (bfd_write ((PTR) x_shdrp, sizeof (*x_shdrp), i_ehdrp->e_shnum, abfd) | |
d909628b | 2422 | != sizeof (*x_shdrp) * i_ehdrp->e_shnum)) |
4002f18a ILT |
2423 | return false; |
2424 | ||
32090b8e | 2425 | /* need to dump the string table too... */ |
244ffee7 | 2426 | |
32090b8e KR |
2427 | return true; |
2428 | } | |
244ffee7 | 2429 | |
013dec1a ILT |
2430 | /* Assign file positions for all the reloc sections which are not part |
2431 | of the loadable file image. */ | |
2432 | ||
32090b8e KR |
2433 | static void |
2434 | assign_file_positions_for_relocs (abfd) | |
2435 | bfd *abfd; | |
2436 | { | |
013dec1a | 2437 | file_ptr off; |
68241b2b | 2438 | unsigned int i; |
013dec1a ILT |
2439 | Elf_Internal_Shdr **shdrpp; |
2440 | ||
2441 | off = elf_tdata (abfd)->next_file_pos; | |
2442 | ||
2443 | for (i = 1, shdrpp = elf_elfsections (abfd) + 1; | |
2444 | i < elf_elfheader (abfd)->e_shnum; | |
2445 | i++, shdrpp++) | |
32090b8e | 2446 | { |
013dec1a ILT |
2447 | Elf_Internal_Shdr *shdrp; |
2448 | ||
2449 | shdrp = *shdrpp; | |
2450 | if ((shdrp->sh_type == SHT_REL || shdrp->sh_type == SHT_RELA) | |
2451 | && shdrp->sh_offset == -1) | |
2452 | off = assign_file_position_for_section (shdrp, off, true); | |
32090b8e | 2453 | } |
013dec1a | 2454 | |
1c6042ee | 2455 | elf_tdata (abfd)->next_file_pos = off; |
32090b8e | 2456 | } |
244ffee7 | 2457 | |
32090b8e | 2458 | boolean |
1c6042ee ILT |
2459 | NAME(bfd_elf,write_object_contents) (abfd) |
2460 | bfd *abfd; | |
32090b8e | 2461 | { |
062189c6 | 2462 | struct elf_backend_data *bed = get_elf_backend_data (abfd); |
32090b8e KR |
2463 | Elf_Internal_Ehdr *i_ehdrp; |
2464 | Elf_Internal_Shdr **i_shdrp; | |
68241b2b | 2465 | unsigned int count; |
244ffee7 | 2466 | |
6ec3bb6a ILT |
2467 | if (! abfd->output_has_begun |
2468 | && ! elf_compute_section_file_positions (abfd, | |
2469 | (struct bfd_link_info *) NULL)) | |
2470 | return false; | |
244ffee7 | 2471 | |
32090b8e KR |
2472 | i_shdrp = elf_elfsections (abfd); |
2473 | i_ehdrp = elf_elfheader (abfd); | |
244ffee7 | 2474 | |
32090b8e | 2475 | bfd_map_over_sections (abfd, write_relocs, (PTR) 0); |
32090b8e | 2476 | assign_file_positions_for_relocs (abfd); |
244ffee7 | 2477 | |
32090b8e | 2478 | /* After writing the headers, we need to write the sections too... */ |
062189c6 | 2479 | for (count = 1; count < i_ehdrp->e_shnum; count++) |
e621c5cc | 2480 | { |
e621c5cc ILT |
2481 | if (bed->elf_backend_section_processing) |
2482 | (*bed->elf_backend_section_processing) (abfd, i_shdrp[count]); | |
2483 | if (i_shdrp[count]->contents) | |
2484 | { | |
4002f18a ILT |
2485 | if (bfd_seek (abfd, i_shdrp[count]->sh_offset, SEEK_SET) != 0 |
2486 | || (bfd_write (i_shdrp[count]->contents, i_shdrp[count]->sh_size, | |
2487 | 1, abfd) | |
2488 | != i_shdrp[count]->sh_size)) | |
2489 | return false; | |
e621c5cc ILT |
2490 | } |
2491 | } | |
062189c6 ILT |
2492 | |
2493 | if (bed->elf_backend_final_write_processing) | |
71edd06d | 2494 | (*bed->elf_backend_final_write_processing) (abfd, NULL); |
062189c6 | 2495 | |
32090b8e KR |
2496 | return write_shdrs_and_ehdr (abfd); |
2497 | } | |
244ffee7 | 2498 | |
32090b8e KR |
2499 | /* Given an index of a section, retrieve a pointer to it. Note |
2500 | that for our purposes, sections are indexed by {1, 2, ...} with | |
2501 | 0 being an illegal index. */ | |
244ffee7 | 2502 | |
32090b8e KR |
2503 | /* In the original, each ELF section went into exactly one BFD |
2504 | section. This doesn't really make sense, so we need a real mapping. | |
2505 | The mapping has to hide in the Elf_Internal_Shdr since asection | |
2506 | doesn't have anything like a tdata field... */ | |
244ffee7 | 2507 | |
2e03ce18 | 2508 | static asection * |
1c6042ee ILT |
2509 | section_from_elf_index (abfd, index) |
2510 | bfd *abfd; | |
2511 | unsigned int index; | |
32090b8e | 2512 | { |
badd23e3 | 2513 | /* @@ Is bfd_com_section_ptr really correct in all the places it could |
32090b8e | 2514 | be returned from this routine? */ |
244ffee7 | 2515 | |
32090b8e | 2516 | if (index == SHN_ABS) |
badd23e3 | 2517 | return bfd_com_section_ptr; /* not abs? */ |
32090b8e | 2518 | if (index == SHN_COMMON) |
badd23e3 | 2519 | return bfd_com_section_ptr; |
244ffee7 | 2520 | |
32090b8e | 2521 | if (index > elf_elfheader (abfd)->e_shnum) |
2e03ce18 | 2522 | return NULL; |
244ffee7 JK |
2523 | |
2524 | { | |
32090b8e | 2525 | Elf_Internal_Shdr *hdr = elf_elfsections (abfd)[index]; |
244ffee7 | 2526 | |
32090b8e | 2527 | switch (hdr->sh_type) |
244ffee7 | 2528 | { |
32090b8e KR |
2529 | /* ELF sections that map to BFD sections */ |
2530 | case SHT_PROGBITS: | |
2531 | case SHT_NOBITS: | |
013dec1a ILT |
2532 | case SHT_HASH: |
2533 | case SHT_DYNAMIC: | |
2e03ce18 ILT |
2534 | if (hdr->rawdata == NULL) |
2535 | { | |
2536 | if (! bfd_section_from_shdr (abfd, index)) | |
2537 | return NULL; | |
2538 | } | |
32090b8e | 2539 | return (struct sec *) hdr->rawdata; |
244ffee7 | 2540 | |
32090b8e | 2541 | default: |
badd23e3 | 2542 | return bfd_abs_section_ptr; |
244ffee7 | 2543 | } |
244ffee7 | 2544 | } |
32090b8e | 2545 | } |
244ffee7 | 2546 | |
32090b8e KR |
2547 | /* given a section, search the header to find them... */ |
2548 | static int | |
1c6042ee ILT |
2549 | elf_section_from_bfd_section (abfd, asect) |
2550 | bfd *abfd; | |
2551 | struct sec *asect; | |
32090b8e KR |
2552 | { |
2553 | Elf_Internal_Shdr **i_shdrp = elf_elfsections (abfd); | |
2554 | int index; | |
2555 | Elf_Internal_Shdr *hdr; | |
2556 | int maxindex = elf_elfheader (abfd)->e_shnum; | |
244ffee7 | 2557 | |
badd23e3 ILT |
2558 | if (asect->owner == NULL) |
2559 | { | |
2560 | if (bfd_is_abs_section (asect)) | |
2561 | return SHN_ABS; | |
2562 | if (bfd_is_com_section (asect)) | |
2563 | return SHN_COMMON; | |
2564 | if (bfd_is_und_section (asect)) | |
2565 | return SHN_UNDEF; | |
2566 | return -1; | |
2567 | } | |
2568 | ||
2569 | BFD_ASSERT (asect->owner == abfd); | |
244ffee7 | 2570 | |
32090b8e KR |
2571 | for (index = 0; index < maxindex; index++) |
2572 | { | |
2573 | hdr = i_shdrp[index]; | |
2574 | switch (hdr->sh_type) | |
2575 | { | |
2576 | /* ELF sections that map to BFD sections */ | |
2577 | case SHT_PROGBITS: | |
2578 | case SHT_NOBITS: | |
e621c5cc | 2579 | case SHT_NOTE: |
013dec1a ILT |
2580 | case SHT_HASH: |
2581 | case SHT_DYNAMIC: | |
fa15568a | 2582 | case SHT_DYNSYM: |
32090b8e KR |
2583 | if (hdr->rawdata) |
2584 | { | |
2585 | if (((struct sec *) (hdr->rawdata)) == asect) | |
2586 | return index; | |
2587 | } | |
2588 | break; | |
01383fb4 | 2589 | |
fa15568a ILT |
2590 | case SHT_REL: |
2591 | case SHT_RELA: | |
2592 | /* We sometimes map a reloc section to a BFD section. */ | |
e6667b2b | 2593 | if (hdr->sh_link != elf_onesymtab (abfd) |
fa15568a ILT |
2594 | && (asection *) hdr->rawdata == asect) |
2595 | return index; | |
2596 | break; | |
2597 | ||
01383fb4 | 2598 | case SHT_STRTAB: |
fa15568a ILT |
2599 | /* We map most string tables to BFD sections. */ |
2600 | if (index != elf_elfheader (abfd)->e_shstrndx | |
2601 | && index != elf_onesymtab (abfd) | |
2602 | && (asection *) hdr->rawdata == asect) | |
2603 | return index; | |
2604 | ||
01383fb4 | 2605 | /* FALL THROUGH */ |
32090b8e | 2606 | default: |
e621c5cc ILT |
2607 | { |
2608 | struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
2609 | ||
2610 | if (bed->elf_backend_section_from_bfd_section) | |
f035cc47 ILT |
2611 | { |
2612 | int retval; | |
2613 | ||
2614 | retval = index; | |
2615 | if ((*bed->elf_backend_section_from_bfd_section) | |
2616 | (abfd, hdr, asect, &retval)) | |
2617 | return retval; | |
2618 | } | |
e621c5cc | 2619 | } |
32090b8e KR |
2620 | break; |
2621 | } | |
2622 | } | |
2623 | return -1; | |
2624 | } | |
244ffee7 | 2625 | |
32090b8e KR |
2626 | /* given a symbol, return the bfd index for that symbol. */ |
2627 | static int | |
1c6042ee ILT |
2628 | elf_symbol_from_bfd_symbol (abfd, asym_ptr_ptr) |
2629 | bfd *abfd; | |
2630 | struct symbol_cache_entry **asym_ptr_ptr; | |
32090b8e KR |
2631 | { |
2632 | struct symbol_cache_entry *asym_ptr = *asym_ptr_ptr; | |
32090b8e | 2633 | int idx; |
d24928c0 | 2634 | flagword flags = asym_ptr->flags; |
32090b8e | 2635 | |
d24928c0 KR |
2636 | /* When gas creates relocations against local labels, it creates its |
2637 | own symbol for the section, but does put the symbol into the | |
e621c5cc ILT |
2638 | symbol chain, so udata is 0. When the linker is generating |
2639 | relocatable output, this section symbol may be for one of the | |
2640 | input sections rather than the output section. */ | |
d24928c0 KR |
2641 | if (asym_ptr->udata == (PTR) 0 |
2642 | && (flags & BSF_SECTION_SYM) | |
e621c5cc ILT |
2643 | && asym_ptr->section) |
2644 | { | |
2645 | int indx; | |
2646 | ||
2647 | if (asym_ptr->section->output_section != NULL) | |
2648 | indx = asym_ptr->section->output_section->index; | |
2649 | else | |
2650 | indx = asym_ptr->section->index; | |
2651 | if (elf_section_syms (abfd)[indx]) | |
2652 | asym_ptr->udata = elf_section_syms (abfd)[indx]->udata; | |
01383fb4 | 2653 | } |
e621c5cc | 2654 | |
d24928c0 | 2655 | if (asym_ptr->udata) |
1c6042ee | 2656 | idx = ((Elf_Sym_Extra *) asym_ptr->udata)->elf_sym_num; |
d24928c0 | 2657 | else |
32090b8e | 2658 | { |
32090b8e KR |
2659 | abort (); |
2660 | } | |
244ffee7 | 2661 | |
32090b8e | 2662 | #if DEBUG & 4 |
244ffee7 | 2663 | { |
244ffee7 | 2664 | |
32090b8e | 2665 | fprintf (stderr, |
d24928c0 | 2666 | "elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx %s\n", |
1c6042ee | 2667 | (long) asym_ptr, asym_ptr->name, idx, flags, elf_symbol_flags (flags)); |
32090b8e KR |
2668 | fflush (stderr); |
2669 | } | |
2670 | #endif | |
2671 | ||
2672 | return idx; | |
2673 | } | |
2674 | ||
cb71adf1 PS |
2675 | static long |
2676 | elf_slurp_symbol_table (abfd, symptrs, dynamic) | |
1c6042ee ILT |
2677 | bfd *abfd; |
2678 | asymbol **symptrs; /* Buffer for generated bfd symbols */ | |
cb71adf1 | 2679 | boolean dynamic; |
32090b8e | 2680 | { |
cb71adf1 | 2681 | Elf_Internal_Shdr *hdr; |
7d8aaf36 | 2682 | long symcount; /* Number of external ELF symbols */ |
32090b8e KR |
2683 | elf_symbol_type *sym; /* Pointer to current bfd symbol */ |
2684 | elf_symbol_type *symbase; /* Buffer for generated bfd symbols */ | |
2685 | Elf_Internal_Sym i_sym; | |
80425e6c | 2686 | Elf_External_Sym *x_symp = NULL; |
32090b8e | 2687 | |
32090b8e KR |
2688 | /* Read each raw ELF symbol, converting from external ELF form to |
2689 | internal ELF form, and then using the information to create a | |
2690 | canonical bfd symbol table entry. | |
244ffee7 | 2691 | |
32090b8e KR |
2692 | Note that we allocate the initial bfd canonical symbol buffer |
2693 | based on a one-to-one mapping of the ELF symbols to canonical | |
2694 | symbols. We actually use all the ELF symbols, so there will be no | |
2695 | space left over at the end. When we have all the symbols, we | |
2696 | build the caller's pointer vector. */ | |
244ffee7 | 2697 | |
cb71adf1 PS |
2698 | if (dynamic) |
2699 | hdr = &elf_tdata (abfd)->dynsymtab_hdr; | |
2700 | else | |
2701 | hdr = &elf_tdata (abfd)->symtab_hdr; | |
32090b8e | 2702 | if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) == -1) |
cb71adf1 | 2703 | return -1; |
244ffee7 | 2704 | |
32090b8e | 2705 | symcount = hdr->sh_size / sizeof (Elf_External_Sym); |
244ffee7 | 2706 | |
7d8aaf36 ILT |
2707 | if (symcount == 0) |
2708 | sym = symbase = NULL; | |
2709 | else | |
244ffee7 | 2710 | { |
7d8aaf36 | 2711 | long i; |
244ffee7 | 2712 | |
7d8aaf36 | 2713 | if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) == -1) |
cb71adf1 | 2714 | return -1; |
7d8aaf36 ILT |
2715 | |
2716 | symbase = ((elf_symbol_type *) | |
2717 | bfd_zalloc (abfd, symcount * sizeof (elf_symbol_type))); | |
2718 | if (symbase == (elf_symbol_type *) NULL) | |
32090b8e | 2719 | { |
7d8aaf36 | 2720 | bfd_set_error (bfd_error_no_memory); |
cb71adf1 | 2721 | return -1; |
32090b8e | 2722 | } |
7d8aaf36 ILT |
2723 | sym = symbase; |
2724 | ||
2725 | /* Temporarily allocate room for the raw ELF symbols. */ | |
2726 | x_symp = ((Elf_External_Sym *) | |
80425e6c | 2727 | malloc (symcount * sizeof (Elf_External_Sym))); |
25057836 | 2728 | if (x_symp == NULL && symcount != 0) |
80425e6c JK |
2729 | { |
2730 | bfd_set_error (bfd_error_no_memory); | |
2731 | goto error_return; | |
2732 | } | |
7d8aaf36 ILT |
2733 | |
2734 | if (bfd_read ((PTR) x_symp, sizeof (Elf_External_Sym), symcount, abfd) | |
2735 | != symcount * sizeof (Elf_External_Sym)) | |
25057836 | 2736 | goto error_return; |
7d8aaf36 ILT |
2737 | /* Skip first symbol, which is a null dummy. */ |
2738 | for (i = 1; i < symcount; i++) | |
32090b8e | 2739 | { |
7d8aaf36 ILT |
2740 | elf_swap_symbol_in (abfd, x_symp + i, &i_sym); |
2741 | memcpy (&sym->internal_elf_sym, &i_sym, sizeof (Elf_Internal_Sym)); | |
2742 | #ifdef ELF_KEEP_EXTSYM | |
2743 | memcpy (&sym->native_elf_sym, x_symp + i, sizeof (Elf_External_Sym)); | |
2744 | #endif | |
2745 | sym->symbol.the_bfd = abfd; | |
244ffee7 | 2746 | |
7d8aaf36 ILT |
2747 | sym->symbol.name = elf_string_from_elf_section (abfd, hdr->sh_link, |
2748 | i_sym.st_name); | |
244ffee7 | 2749 | |
7d8aaf36 | 2750 | sym->symbol.value = i_sym.st_value; |
244ffee7 | 2751 | |
6ec3bb6a | 2752 | if (i_sym.st_shndx > 0 && i_sym.st_shndx < SHN_LORESERVE) |
7d8aaf36 ILT |
2753 | { |
2754 | sym->symbol.section = section_from_elf_index (abfd, | |
2755 | i_sym.st_shndx); | |
2e03ce18 | 2756 | if (sym->symbol.section == NULL) |
013dec1a ILT |
2757 | { |
2758 | /* This symbol is in a section for which we did not | |
2759 | create a BFD section. Just use bfd_abs_section, | |
2760 | although it is wrong. FIXME. */ | |
badd23e3 | 2761 | sym->symbol.section = bfd_abs_section_ptr; |
013dec1a | 2762 | } |
7d8aaf36 ILT |
2763 | } |
2764 | else if (i_sym.st_shndx == SHN_ABS) | |
2765 | { | |
badd23e3 | 2766 | sym->symbol.section = bfd_abs_section_ptr; |
7d8aaf36 ILT |
2767 | } |
2768 | else if (i_sym.st_shndx == SHN_COMMON) | |
2769 | { | |
badd23e3 | 2770 | sym->symbol.section = bfd_com_section_ptr; |
7d8aaf36 ILT |
2771 | /* Elf puts the alignment into the `value' field, and |
2772 | the size into the `size' field. BFD wants to see the | |
2773 | size in the value field, and doesn't care (at the | |
2774 | moment) about the alignment. */ | |
2775 | sym->symbol.value = i_sym.st_size; | |
2776 | } | |
2777 | else if (i_sym.st_shndx == SHN_UNDEF) | |
2778 | { | |
badd23e3 | 2779 | sym->symbol.section = bfd_und_section_ptr; |
7d8aaf36 ILT |
2780 | } |
2781 | else | |
badd23e3 | 2782 | sym->symbol.section = bfd_abs_section_ptr; |
300adb31 | 2783 | |
7d8aaf36 | 2784 | sym->symbol.value -= sym->symbol.section->vma; |
244ffee7 | 2785 | |
7d8aaf36 ILT |
2786 | switch (ELF_ST_BIND (i_sym.st_info)) |
2787 | { | |
2788 | case STB_LOCAL: | |
2789 | sym->symbol.flags |= BSF_LOCAL; | |
2790 | break; | |
2791 | case STB_GLOBAL: | |
2792 | sym->symbol.flags |= BSF_GLOBAL; | |
2793 | break; | |
2794 | case STB_WEAK: | |
2795 | sym->symbol.flags |= BSF_WEAK; | |
2796 | break; | |
2797 | } | |
2798 | ||
2799 | switch (ELF_ST_TYPE (i_sym.st_info)) | |
2800 | { | |
2801 | case STT_SECTION: | |
2802 | sym->symbol.flags |= BSF_SECTION_SYM | BSF_DEBUGGING; | |
2803 | break; | |
2804 | case STT_FILE: | |
2805 | sym->symbol.flags |= BSF_FILE | BSF_DEBUGGING; | |
2806 | break; | |
2807 | case STT_FUNC: | |
2808 | sym->symbol.flags |= BSF_FUNCTION; | |
2809 | break; | |
2810 | } | |
2811 | ||
cb71adf1 PS |
2812 | if (dynamic) |
2813 | sym->symbol.flags |= BSF_DYNAMIC; | |
2814 | ||
7d8aaf36 ILT |
2815 | /* Do some backend-specific processing on this symbol. */ |
2816 | { | |
2817 | struct elf_backend_data *ebd = get_elf_backend_data (abfd); | |
2818 | if (ebd->elf_backend_symbol_processing) | |
2819 | (*ebd->elf_backend_symbol_processing) (abfd, &sym->symbol); | |
2820 | } | |
2821 | ||
2822 | sym++; | |
2823 | } | |
244ffee7 JK |
2824 | } |
2825 | ||
e621c5cc ILT |
2826 | /* Do some backend-specific processing on this symbol table. */ |
2827 | { | |
2828 | struct elf_backend_data *ebd = get_elf_backend_data (abfd); | |
2829 | if (ebd->elf_backend_symbol_table_processing) | |
2830 | (*ebd->elf_backend_symbol_table_processing) (abfd, symbase, symcount); | |
2831 | } | |
244ffee7 | 2832 | |
e621c5cc | 2833 | /* We rely on the zalloc to clear out the final symbol entry. */ |
244ffee7 | 2834 | |
cb71adf1 | 2835 | symcount = sym - symbase; |
32090b8e KR |
2836 | |
2837 | /* Fill in the user's symbol pointer vector if needed. */ | |
2838 | if (symptrs) | |
244ffee7 | 2839 | { |
cb71adf1 PS |
2840 | long l = symcount; |
2841 | ||
32090b8e | 2842 | sym = symbase; |
cb71adf1 | 2843 | while (l-- > 0) |
244ffee7 | 2844 | { |
32090b8e KR |
2845 | *symptrs++ = &sym->symbol; |
2846 | sym++; | |
244ffee7 | 2847 | } |
32090b8e | 2848 | *symptrs = 0; /* Final null pointer */ |
244ffee7 JK |
2849 | } |
2850 | ||
80425e6c JK |
2851 | if (x_symp != NULL) |
2852 | free (x_symp); | |
cb71adf1 | 2853 | return symcount; |
1c6042ee | 2854 | error_return: |
80425e6c JK |
2855 | if (x_symp != NULL) |
2856 | free (x_symp); | |
cb71adf1 | 2857 | return -1; |
244ffee7 JK |
2858 | } |
2859 | ||
32090b8e | 2860 | /* Return the number of bytes required to hold the symtab vector. |
244ffee7 | 2861 | |
32090b8e KR |
2862 | Note that we base it on the count plus 1, since we will null terminate |
2863 | the vector allocated based on this size. However, the ELF symbol table | |
2864 | always has a dummy entry as symbol #0, so it ends up even. */ | |
244ffee7 | 2865 | |
326e32d7 | 2866 | long |
1c6042ee ILT |
2867 | elf_get_symtab_upper_bound (abfd) |
2868 | bfd *abfd; | |
244ffee7 | 2869 | { |
326e32d7 ILT |
2870 | long symcount; |
2871 | long symtab_size; | |
1c6042ee | 2872 | Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->symtab_hdr; |
326e32d7 | 2873 | |
32090b8e | 2874 | symcount = hdr->sh_size / sizeof (Elf_External_Sym); |
d6439785 | 2875 | symtab_size = (symcount - 1 + 1) * (sizeof (asymbol *)); |
244ffee7 | 2876 | |
32090b8e KR |
2877 | return symtab_size; |
2878 | } | |
244ffee7 | 2879 | |
cb71adf1 PS |
2880 | long |
2881 | elf_get_dynamic_symtab_upper_bound (abfd) | |
2882 | bfd *abfd; | |
2883 | { | |
2884 | long symcount; | |
2885 | long symtab_size; | |
2886 | Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->dynsymtab_hdr; | |
2887 | ||
2888 | symcount = hdr->sh_size / sizeof (Elf_External_Sym); | |
2889 | symtab_size = (symcount - 1 + 1) * (sizeof (asymbol *)); | |
2890 | ||
2891 | return symtab_size; | |
2892 | } | |
2893 | ||
326e32d7 | 2894 | long |
32090b8e KR |
2895 | elf_get_reloc_upper_bound (abfd, asect) |
2896 | bfd *abfd; | |
2897 | sec_ptr asect; | |
2898 | { | |
51fc377b | 2899 | return (asect->reloc_count + 1) * sizeof (arelent *); |
244ffee7 JK |
2900 | } |
2901 | ||
32090b8e | 2902 | static boolean |
1c6042ee ILT |
2903 | elf_slurp_reloca_table (abfd, asect, symbols) |
2904 | bfd *abfd; | |
2905 | sec_ptr asect; | |
2906 | asymbol **symbols; | |
244ffee7 | 2907 | { |
32090b8e KR |
2908 | Elf_External_Rela *native_relocs; |
2909 | arelent *reloc_cache; | |
2910 | arelent *cache_ptr; | |
244ffee7 | 2911 | |
32090b8e | 2912 | unsigned int idx; |
244ffee7 | 2913 | |
32090b8e KR |
2914 | if (asect->relocation) |
2915 | return true; | |
2916 | if (asect->reloc_count == 0) | |
2917 | return true; | |
2918 | if (asect->flags & SEC_CONSTRUCTOR) | |
2919 | return true; | |
244ffee7 | 2920 | |
4002f18a ILT |
2921 | if (bfd_seek (abfd, asect->rel_filepos, SEEK_SET) != 0) |
2922 | return false; | |
32090b8e KR |
2923 | native_relocs = (Elf_External_Rela *) |
2924 | bfd_alloc (abfd, asect->reloc_count * sizeof (Elf_External_Rela)); | |
9783e04a | 2925 | if (!native_relocs) |
9783e04a | 2926 | { |
d1ad85a6 | 2927 | bfd_set_error (bfd_error_no_memory); |
9783e04a DM |
2928 | return false; |
2929 | } | |
4002f18a ILT |
2930 | if (bfd_read ((PTR) native_relocs, |
2931 | sizeof (Elf_External_Rela), asect->reloc_count, abfd) | |
2932 | != sizeof (Elf_External_Rela) * asect->reloc_count) | |
2933 | return false; | |
244ffee7 | 2934 | |
32090b8e KR |
2935 | reloc_cache = (arelent *) |
2936 | bfd_alloc (abfd, (size_t) (asect->reloc_count * sizeof (arelent))); | |
2937 | ||
2938 | if (!reloc_cache) | |
6a3eb9b6 | 2939 | { |
d1ad85a6 | 2940 | bfd_set_error (bfd_error_no_memory); |
32090b8e | 2941 | return false; |
6a3eb9b6 | 2942 | } |
244ffee7 | 2943 | |
32090b8e KR |
2944 | for (idx = 0; idx < asect->reloc_count; idx++) |
2945 | { | |
32090b8e KR |
2946 | Elf_Internal_Rela dst; |
2947 | Elf_External_Rela *src; | |
244ffee7 | 2948 | |
32090b8e KR |
2949 | cache_ptr = reloc_cache + idx; |
2950 | src = native_relocs + idx; | |
2951 | elf_swap_reloca_in (abfd, src, &dst); | |
244ffee7 | 2952 | |
d24928c0 | 2953 | #ifdef RELOC_PROCESSING |
32090b8e KR |
2954 | RELOC_PROCESSING (cache_ptr, &dst, symbols, abfd, asect); |
2955 | #else | |
32090b8e KR |
2956 | if (asect->flags & SEC_RELOC) |
2957 | { | |
2958 | /* relocatable, so the offset is off of the section */ | |
2959 | cache_ptr->address = dst.r_offset + asect->vma; | |
2960 | } | |
2961 | else | |
2962 | { | |
2963 | /* non-relocatable, so the offset a virtual address */ | |
2964 | cache_ptr->address = dst.r_offset; | |
2965 | } | |
7b8106b4 ILT |
2966 | |
2967 | /* ELF_R_SYM(dst.r_info) is the symbol table offset. An offset | |
2968 | of zero points to the dummy symbol, which was not read into | |
2969 | the symbol table SYMBOLS. */ | |
2970 | if (ELF_R_SYM (dst.r_info) == 0) | |
badd23e3 | 2971 | cache_ptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; |
7b8106b4 ILT |
2972 | else |
2973 | { | |
2974 | asymbol *s; | |
2975 | ||
2976 | cache_ptr->sym_ptr_ptr = symbols + ELF_R_SYM (dst.r_info) - 1; | |
2977 | ||
2978 | /* Translate any ELF section symbol into a BFD section | |
2979 | symbol. */ | |
2980 | s = *(cache_ptr->sym_ptr_ptr); | |
2981 | if (s->flags & BSF_SECTION_SYM) | |
2982 | { | |
2983 | cache_ptr->sym_ptr_ptr = s->section->symbol_ptr_ptr; | |
2984 | s = *cache_ptr->sym_ptr_ptr; | |
2985 | if (s->name == 0 || s->name[0] == 0) | |
2986 | abort (); | |
2987 | } | |
2988 | } | |
32090b8e | 2989 | cache_ptr->addend = dst.r_addend; |
244ffee7 | 2990 | |
32090b8e KR |
2991 | /* Fill in the cache_ptr->howto field from dst.r_type */ |
2992 | { | |
2993 | struct elf_backend_data *ebd = get_elf_backend_data (abfd); | |
2994 | (*ebd->elf_info_to_howto) (abfd, cache_ptr, &dst); | |
2995 | } | |
2996 | #endif | |
2997 | } | |
244ffee7 | 2998 | |
32090b8e KR |
2999 | asect->relocation = reloc_cache; |
3000 | return true; | |
3001 | } | |
238ac6ec | 3002 | |
32090b8e KR |
3003 | #ifdef DEBUG |
3004 | static void | |
3005 | elf_debug_section (str, num, hdr) | |
3006 | char *str; | |
3007 | int num; | |
3008 | Elf_Internal_Shdr *hdr; | |
3009 | { | |
3010 | fprintf (stderr, "\nSection#%d '%s' 0x%.8lx\n", num, str, (long) hdr); | |
3011 | fprintf (stderr, | |
3012 | "sh_name = %ld\tsh_type = %ld\tsh_flags = %ld\n", | |
3013 | (long) hdr->sh_name, | |
3014 | (long) hdr->sh_type, | |
3015 | (long) hdr->sh_flags); | |
3016 | fprintf (stderr, | |
3017 | "sh_addr = %ld\tsh_offset = %ld\tsh_size = %ld\n", | |
3018 | (long) hdr->sh_addr, | |
3019 | (long) hdr->sh_offset, | |
3020 | (long) hdr->sh_size); | |
3021 | fprintf (stderr, | |
3022 | "sh_link = %ld\tsh_info = %ld\tsh_addralign = %ld\n", | |
3023 | (long) hdr->sh_link, | |
3024 | (long) hdr->sh_info, | |
3025 | (long) hdr->sh_addralign); | |
3026 | fprintf (stderr, "sh_entsize = %ld\n", | |
3027 | (long) hdr->sh_entsize); | |
3028 | fprintf (stderr, "rawdata = 0x%.8lx\n", (long) hdr->rawdata); | |
3029 | fprintf (stderr, "contents = 0x%.8lx\n", (long) hdr->contents); | |
3030 | fprintf (stderr, "size = %ld\n", (long) hdr->size); | |
3031 | fflush (stderr); | |
3032 | } | |
244ffee7 | 3033 | |
32090b8e KR |
3034 | static void |
3035 | elf_debug_file (ehdrp) | |
3036 | Elf_Internal_Ehdr *ehdrp; | |
3037 | { | |
3038 | fprintf (stderr, "e_entry = 0x%.8lx\n", (long) ehdrp->e_entry); | |
3039 | fprintf (stderr, "e_phoff = %ld\n", (long) ehdrp->e_phoff); | |
3040 | fprintf (stderr, "e_phnum = %ld\n", (long) ehdrp->e_phnum); | |
3041 | fprintf (stderr, "e_phentsize = %ld\n", (long) ehdrp->e_phentsize); | |
3042 | fprintf (stderr, "e_shoff = %ld\n", (long) ehdrp->e_shoff); | |
3043 | fprintf (stderr, "e_shnum = %ld\n", (long) ehdrp->e_shnum); | |
3044 | fprintf (stderr, "e_shentsize = %ld\n", (long) ehdrp->e_shentsize); | |
244ffee7 | 3045 | } |
32090b8e | 3046 | #endif |
244ffee7 JK |
3047 | |
3048 | static boolean | |
1c6042ee ILT |
3049 | elf_slurp_reloc_table (abfd, asect, symbols) |
3050 | bfd *abfd; | |
3051 | sec_ptr asect; | |
3052 | asymbol **symbols; | |
244ffee7 | 3053 | { |
32090b8e KR |
3054 | Elf_External_Rel *native_relocs; |
3055 | arelent *reloc_cache; | |
3056 | arelent *cache_ptr; | |
3057 | Elf_Internal_Shdr *data_hdr; | |
25677b5b PS |
3058 | bfd_vma data_off; |
3059 | unsigned long data_max; | |
32090b8e | 3060 | char buf[4]; /* FIXME -- might be elf64 */ |
244ffee7 | 3061 | |
32090b8e | 3062 | unsigned int idx; |
244ffee7 | 3063 | |
32090b8e KR |
3064 | if (asect->relocation) |
3065 | return true; | |
3066 | if (asect->reloc_count == 0) | |
3067 | return true; | |
3068 | if (asect->flags & SEC_CONSTRUCTOR) | |
3069 | return true; | |
244ffee7 | 3070 | |
4002f18a ILT |
3071 | if (bfd_seek (abfd, asect->rel_filepos, SEEK_SET) != 0) |
3072 | return false; | |
32090b8e KR |
3073 | native_relocs = (Elf_External_Rel *) |
3074 | bfd_alloc (abfd, asect->reloc_count * sizeof (Elf_External_Rel)); | |
9783e04a DM |
3075 | if (!native_relocs) |
3076 | { | |
d1ad85a6 | 3077 | bfd_set_error (bfd_error_no_memory); |
9783e04a DM |
3078 | return false; |
3079 | } | |
4002f18a ILT |
3080 | if (bfd_read ((PTR) native_relocs, |
3081 | sizeof (Elf_External_Rel), asect->reloc_count, abfd) | |
3082 | != sizeof (Elf_External_Rel) * asect->reloc_count) | |
3083 | return false; | |
244ffee7 | 3084 | |
32090b8e KR |
3085 | reloc_cache = (arelent *) |
3086 | bfd_alloc (abfd, (size_t) (asect->reloc_count * sizeof (arelent))); | |
3087 | ||
3088 | if (!reloc_cache) | |
244ffee7 | 3089 | { |
d1ad85a6 | 3090 | bfd_set_error (bfd_error_no_memory); |
244ffee7 JK |
3091 | return false; |
3092 | } | |
3093 | ||
32090b8e KR |
3094 | /* Get the offset of the start of the segment we are relocating to read in |
3095 | the implicit addend. */ | |
1c6042ee | 3096 | data_hdr = &elf_section_data (asect)->this_hdr; |
32090b8e KR |
3097 | data_off = data_hdr->sh_offset; |
3098 | data_max = data_hdr->sh_size - sizeof (buf) + 1; | |
244ffee7 | 3099 | |
32090b8e KR |
3100 | #if DEBUG & 2 |
3101 | elf_debug_section ("data section", -1, data_hdr); | |
3102 | #endif | |
244ffee7 | 3103 | |
32090b8e | 3104 | for (idx = 0; idx < asect->reloc_count; idx++) |
244ffee7 | 3105 | { |
32090b8e KR |
3106 | #ifdef RELOC_PROCESSING |
3107 | Elf_Internal_Rel dst; | |
3108 | Elf_External_Rel *src; | |
244ffee7 | 3109 | |
32090b8e KR |
3110 | cache_ptr = reloc_cache + idx; |
3111 | src = native_relocs + idx; | |
3112 | elf_swap_reloc_in (abfd, src, &dst); | |
244ffee7 | 3113 | |
32090b8e KR |
3114 | RELOC_PROCESSING (cache_ptr, &dst, symbols, abfd, asect); |
3115 | #else | |
3116 | Elf_Internal_Rel dst; | |
3117 | Elf_External_Rel *src; | |
6a3eb9b6 | 3118 | |
32090b8e KR |
3119 | cache_ptr = reloc_cache + idx; |
3120 | src = native_relocs + idx; | |
3121 | ||
3122 | elf_swap_reloc_in (abfd, src, &dst); | |
3123 | ||
3124 | if (asect->flags & SEC_RELOC) | |
244ffee7 | 3125 | { |
32090b8e KR |
3126 | /* relocatable, so the offset is off of the section */ |
3127 | cache_ptr->address = dst.r_offset + asect->vma; | |
244ffee7 | 3128 | } |
32090b8e | 3129 | else |
244ffee7 | 3130 | { |
32090b8e KR |
3131 | /* non-relocatable, so the offset a virtual address */ |
3132 | cache_ptr->address = dst.r_offset; | |
244ffee7 | 3133 | } |
7b8106b4 ILT |
3134 | |
3135 | /* ELF_R_SYM(dst.r_info) is the symbol table offset. An offset | |
3136 | of zero points to the dummy symbol, which was not read into | |
3137 | the symbol table SYMBOLS. */ | |
3138 | if (ELF_R_SYM (dst.r_info) == 0) | |
badd23e3 | 3139 | cache_ptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; |
7b8106b4 ILT |
3140 | else |
3141 | { | |
3142 | asymbol *s; | |
3143 | ||
3144 | cache_ptr->sym_ptr_ptr = symbols + ELF_R_SYM (dst.r_info) - 1; | |
3145 | ||
3146 | /* Translate any ELF section symbol into a BFD section | |
3147 | symbol. */ | |
3148 | s = *(cache_ptr->sym_ptr_ptr); | |
3149 | if (s->flags & BSF_SECTION_SYM) | |
3150 | { | |
3151 | cache_ptr->sym_ptr_ptr = s->section->symbol_ptr_ptr; | |
3152 | s = *cache_ptr->sym_ptr_ptr; | |
3153 | if (s->name == 0 || s->name[0] == 0) | |
3154 | abort (); | |
3155 | } | |
3156 | } | |
32090b8e | 3157 | BFD_ASSERT (dst.r_offset <= data_max); |
d24928c0 | 3158 | cache_ptr->addend = 0; |
244ffee7 | 3159 | |
32090b8e KR |
3160 | /* Fill in the cache_ptr->howto field from dst.r_type */ |
3161 | { | |
3162 | struct elf_backend_data *ebd = get_elf_backend_data (abfd); | |
3163 | (*ebd->elf_info_to_howto_rel) (abfd, cache_ptr, &dst); | |
3164 | } | |
3165 | #endif | |
3166 | } | |
244ffee7 | 3167 | |
32090b8e KR |
3168 | asect->relocation = reloc_cache; |
3169 | return true; | |
3170 | } | |
244ffee7 | 3171 | |
326e32d7 | 3172 | long |
32090b8e KR |
3173 | elf_canonicalize_reloc (abfd, section, relptr, symbols) |
3174 | bfd *abfd; | |
3175 | sec_ptr section; | |
3176 | arelent **relptr; | |
3177 | asymbol **symbols; | |
3178 | { | |
3179 | arelent *tblptr = section->relocation; | |
3180 | unsigned int count = 0; | |
3181 | int use_rela_p = get_elf_backend_data (abfd)->use_rela_p; | |
3182 | ||
3183 | /* snarfed from coffcode.h */ | |
3184 | if (use_rela_p) | |
326e32d7 ILT |
3185 | { |
3186 | if (! elf_slurp_reloca_table (abfd, section, symbols)) | |
3187 | return -1; | |
3188 | } | |
32090b8e | 3189 | else |
326e32d7 ILT |
3190 | { |
3191 | if (! elf_slurp_reloc_table (abfd, section, symbols)) | |
3192 | return -1; | |
3193 | } | |
32090b8e KR |
3194 | |
3195 | tblptr = section->relocation; | |
32090b8e KR |
3196 | |
3197 | for (; count++ < section->reloc_count;) | |
3198 | *relptr++ = tblptr++; | |
3199 | ||
3200 | *relptr = 0; | |
3201 | return section->reloc_count; | |
3202 | } | |
3203 | ||
326e32d7 | 3204 | long |
1c6042ee ILT |
3205 | elf_get_symtab (abfd, alocation) |
3206 | bfd *abfd; | |
3207 | asymbol **alocation; | |
32090b8e | 3208 | { |
cb71adf1 PS |
3209 | long symcount = elf_slurp_symbol_table (abfd, alocation, false); |
3210 | ||
3211 | if (symcount >= 0) | |
3212 | bfd_get_symcount (abfd) = symcount; | |
3213 | return symcount; | |
3214 | } | |
326e32d7 | 3215 | |
cb71adf1 PS |
3216 | long |
3217 | elf_canonicalize_dynamic_symtab (abfd, alocation) | |
3218 | bfd *abfd; | |
3219 | asymbol **alocation; | |
3220 | { | |
3221 | return elf_slurp_symbol_table (abfd, alocation, true); | |
32090b8e KR |
3222 | } |
3223 | ||
3224 | asymbol * | |
1c6042ee ILT |
3225 | elf_make_empty_symbol (abfd) |
3226 | bfd *abfd; | |
32090b8e KR |
3227 | { |
3228 | elf_symbol_type *newsym; | |
3229 | ||
3230 | newsym = (elf_symbol_type *) bfd_zalloc (abfd, sizeof (elf_symbol_type)); | |
3231 | if (!newsym) | |
3232 | { | |
d1ad85a6 | 3233 | bfd_set_error (bfd_error_no_memory); |
32090b8e KR |
3234 | return NULL; |
3235 | } | |
3236 | else | |
3237 | { | |
3238 | newsym->symbol.the_bfd = abfd; | |
3239 | return &newsym->symbol; | |
244ffee7 | 3240 | } |
32090b8e | 3241 | } |
244ffee7 | 3242 | |
32090b8e | 3243 | void |
1c6042ee ILT |
3244 | elf_get_symbol_info (ignore_abfd, symbol, ret) |
3245 | bfd *ignore_abfd; | |
3246 | asymbol *symbol; | |
3247 | symbol_info *ret; | |
32090b8e KR |
3248 | { |
3249 | bfd_symbol_info (symbol, ret); | |
3250 | } | |
244ffee7 | 3251 | |
32090b8e | 3252 | void |
1c6042ee ILT |
3253 | elf_print_symbol (ignore_abfd, filep, symbol, how) |
3254 | bfd *ignore_abfd; | |
3255 | PTR filep; | |
3256 | asymbol *symbol; | |
3257 | bfd_print_symbol_type how; | |
32090b8e KR |
3258 | { |
3259 | FILE *file = (FILE *) filep; | |
3260 | switch (how) | |
3261 | { | |
3262 | case bfd_print_symbol_name: | |
3263 | fprintf (file, "%s", symbol->name); | |
3264 | break; | |
3265 | case bfd_print_symbol_more: | |
3266 | fprintf (file, "elf "); | |
3267 | fprintf_vma (file, symbol->value); | |
3268 | fprintf (file, " %lx", (long) symbol->flags); | |
3269 | break; | |
3270 | case bfd_print_symbol_all: | |
3271 | { | |
3272 | CONST char *section_name; | |
3273 | section_name = symbol->section ? symbol->section->name : "(*none*)"; | |
3274 | bfd_print_symbol_vandf ((PTR) file, symbol); | |
3275 | fprintf (file, " %s\t%s", | |
3276 | section_name, | |
3277 | symbol->name); | |
3278 | } | |
3279 | break; | |
3280 | } | |
244ffee7 | 3281 | |
32090b8e | 3282 | } |
244ffee7 | 3283 | |
32090b8e | 3284 | alent * |
1c6042ee ILT |
3285 | elf_get_lineno (ignore_abfd, symbol) |
3286 | bfd *ignore_abfd; | |
3287 | asymbol *symbol; | |
32090b8e KR |
3288 | { |
3289 | fprintf (stderr, "elf_get_lineno unimplemented\n"); | |
3290 | fflush (stderr); | |
3291 | BFD_FAIL (); | |
3292 | return NULL; | |
3293 | } | |
3294 | ||
3295 | boolean | |
1c6042ee ILT |
3296 | elf_set_arch_mach (abfd, arch, machine) |
3297 | bfd *abfd; | |
3298 | enum bfd_architecture arch; | |
3299 | unsigned long machine; | |
32090b8e | 3300 | { |
80a903c9 ILT |
3301 | /* If this isn't the right architecture for this backend, and this |
3302 | isn't the generic backend, fail. */ | |
3303 | if (arch != get_elf_backend_data (abfd)->arch | |
3304 | && arch != bfd_arch_unknown | |
3305 | && get_elf_backend_data (abfd)->arch != bfd_arch_unknown) | |
3306 | return false; | |
3307 | ||
3308 | return bfd_default_set_arch_mach (abfd, arch, machine); | |
32090b8e | 3309 | } |
244ffee7 | 3310 | |
32090b8e | 3311 | boolean |
1c6042ee ILT |
3312 | elf_find_nearest_line (abfd, |
3313 | section, | |
3314 | symbols, | |
3315 | offset, | |
3316 | filename_ptr, | |
3317 | functionname_ptr, | |
3318 | line_ptr) | |
3319 | bfd *abfd; | |
3320 | asection *section; | |
3321 | asymbol **symbols; | |
3322 | bfd_vma offset; | |
3323 | CONST char **filename_ptr; | |
3324 | CONST char **functionname_ptr; | |
3325 | unsigned int *line_ptr; | |
32090b8e KR |
3326 | { |
3327 | return false; | |
244ffee7 JK |
3328 | } |
3329 | ||
32090b8e | 3330 | int |
1c6042ee ILT |
3331 | elf_sizeof_headers (abfd, reloc) |
3332 | bfd *abfd; | |
3333 | boolean reloc; | |
32090b8e | 3334 | { |
013dec1a ILT |
3335 | int ret; |
3336 | ||
3337 | ret = sizeof (Elf_External_Ehdr); | |
3338 | if (! reloc) | |
3339 | ret += get_program_header_size (abfd); | |
3340 | return ret; | |
32090b8e | 3341 | } |
244ffee7 | 3342 | |
32090b8e | 3343 | boolean |
1c6042ee ILT |
3344 | elf_set_section_contents (abfd, section, location, offset, count) |
3345 | bfd *abfd; | |
3346 | sec_ptr section; | |
3347 | PTR location; | |
3348 | file_ptr offset; | |
3349 | bfd_size_type count; | |
244ffee7 | 3350 | { |
244ffee7 JK |
3351 | Elf_Internal_Shdr *hdr; |
3352 | ||
6ec3bb6a ILT |
3353 | if (! abfd->output_has_begun |
3354 | && ! elf_compute_section_file_positions (abfd, | |
3355 | (struct bfd_link_info *) NULL)) | |
3356 | return false; | |
244ffee7 | 3357 | |
1c6042ee | 3358 | hdr = &elf_section_data (section)->this_hdr; |
244ffee7 | 3359 | |
32090b8e KR |
3360 | if (bfd_seek (abfd, hdr->sh_offset + offset, SEEK_SET) == -1) |
3361 | return false; | |
3362 | if (bfd_write (location, 1, count, abfd) != count) | |
3363 | return false; | |
3364 | ||
3365 | return true; | |
3366 | } | |
3367 | ||
3368 | void | |
1c6042ee ILT |
3369 | elf_no_info_to_howto (abfd, cache_ptr, dst) |
3370 | bfd *abfd; | |
3371 | arelent *cache_ptr; | |
3372 | Elf_Internal_Rela *dst; | |
244ffee7 | 3373 | { |
32090b8e KR |
3374 | fprintf (stderr, "elf RELA relocation support for target machine unimplemented\n"); |
3375 | fflush (stderr); | |
3376 | BFD_FAIL (); | |
244ffee7 JK |
3377 | } |
3378 | ||
32090b8e | 3379 | void |
1c6042ee ILT |
3380 | elf_no_info_to_howto_rel (abfd, cache_ptr, dst) |
3381 | bfd *abfd; | |
3382 | arelent *cache_ptr; | |
3383 | Elf_Internal_Rel *dst; | |
244ffee7 | 3384 | { |
32090b8e KR |
3385 | fprintf (stderr, "elf REL relocation support for target machine unimplemented\n"); |
3386 | fflush (stderr); | |
3387 | BFD_FAIL (); | |
3388 | } | |
32090b8e | 3389 | \f |
1c6042ee | 3390 | |
32090b8e | 3391 | /* Core file support */ |
244ffee7 | 3392 | |
32090b8e KR |
3393 | #ifdef HAVE_PROCFS /* Some core file support requires host /proc files */ |
3394 | #include <sys/procfs.h> | |
3395 | #else | |
2e03ce18 ILT |
3396 | #define bfd_prstatus(abfd, descdata, descsz, filepos) true |
3397 | #define bfd_fpregset(abfd, descdata, descsz, filepos) true | |
3398 | #define bfd_prpsinfo(abfd, descdata, descsz, filepos) true | |
32090b8e | 3399 | #endif |
244ffee7 | 3400 | |
32090b8e | 3401 | #ifdef HAVE_PROCFS |
244ffee7 | 3402 | |
2e03ce18 | 3403 | static boolean |
1c6042ee ILT |
3404 | bfd_prstatus (abfd, descdata, descsz, filepos) |
3405 | bfd *abfd; | |
3406 | char *descdata; | |
3407 | int descsz; | |
3408 | long filepos; | |
32090b8e KR |
3409 | { |
3410 | asection *newsect; | |
3411 | prstatus_t *status = (prstatus_t *) 0; | |
244ffee7 | 3412 | |
32090b8e | 3413 | if (descsz == sizeof (prstatus_t)) |
244ffee7 | 3414 | { |
32090b8e | 3415 | newsect = bfd_make_section (abfd, ".reg"); |
2e03ce18 ILT |
3416 | if (newsect == NULL) |
3417 | return false; | |
32090b8e KR |
3418 | newsect->_raw_size = sizeof (status->pr_reg); |
3419 | newsect->filepos = filepos + (long) &status->pr_reg; | |
3420 | newsect->flags = SEC_ALLOC | SEC_HAS_CONTENTS; | |
3421 | newsect->alignment_power = 2; | |
3422 | if ((core_prstatus (abfd) = bfd_alloc (abfd, descsz)) != NULL) | |
3423 | { | |
3424 | memcpy (core_prstatus (abfd), descdata, descsz); | |
3425 | } | |
244ffee7 | 3426 | } |
2e03ce18 | 3427 | return true; |
32090b8e | 3428 | } |
244ffee7 | 3429 | |
32090b8e | 3430 | /* Stash a copy of the prpsinfo structure away for future use. */ |
244ffee7 | 3431 | |
2e03ce18 | 3432 | static boolean |
1c6042ee ILT |
3433 | bfd_prpsinfo (abfd, descdata, descsz, filepos) |
3434 | bfd *abfd; | |
3435 | char *descdata; | |
3436 | int descsz; | |
3437 | long filepos; | |
32090b8e | 3438 | { |
32090b8e KR |
3439 | if (descsz == sizeof (prpsinfo_t)) |
3440 | { | |
2e03ce18 | 3441 | if ((core_prpsinfo (abfd) = bfd_alloc (abfd, descsz)) == NULL) |
244ffee7 | 3442 | { |
2e03ce18 ILT |
3443 | bfd_set_error (bfd_error_no_memory); |
3444 | return false; | |
244ffee7 | 3445 | } |
2e03ce18 | 3446 | memcpy (core_prpsinfo (abfd), descdata, descsz); |
244ffee7 | 3447 | } |
2e03ce18 | 3448 | return true; |
244ffee7 JK |
3449 | } |
3450 | ||
2e03ce18 | 3451 | static boolean |
1c6042ee ILT |
3452 | bfd_fpregset (abfd, descdata, descsz, filepos) |
3453 | bfd *abfd; | |
3454 | char *descdata; | |
3455 | int descsz; | |
3456 | long filepos; | |
244ffee7 | 3457 | { |
32090b8e | 3458 | asection *newsect; |
244ffee7 | 3459 | |
32090b8e | 3460 | newsect = bfd_make_section (abfd, ".reg2"); |
2e03ce18 ILT |
3461 | if (newsect == NULL) |
3462 | return false; | |
32090b8e KR |
3463 | newsect->_raw_size = descsz; |
3464 | newsect->filepos = filepos; | |
3465 | newsect->flags = SEC_ALLOC | SEC_HAS_CONTENTS; | |
3466 | newsect->alignment_power = 2; | |
2e03ce18 | 3467 | return true; |
6a3eb9b6 | 3468 | } |
244ffee7 | 3469 | |
32090b8e KR |
3470 | #endif /* HAVE_PROCFS */ |
3471 | ||
3472 | /* Return a pointer to the args (including the command name) that were | |
3473 | seen by the program that generated the core dump. Note that for | |
3474 | some reason, a spurious space is tacked onto the end of the args | |
3475 | in some (at least one anyway) implementations, so strip it off if | |
3476 | it exists. */ | |
3477 | ||
3478 | char * | |
1c6042ee ILT |
3479 | elf_core_file_failing_command (abfd) |
3480 | bfd *abfd; | |
244ffee7 | 3481 | { |
32090b8e KR |
3482 | #ifdef HAVE_PROCFS |
3483 | if (core_prpsinfo (abfd)) | |
3484 | { | |
3485 | prpsinfo_t *p = core_prpsinfo (abfd); | |
3486 | char *scan = p->pr_psargs; | |
3487 | while (*scan++) | |
3488 | {; | |
3489 | } | |
3490 | scan -= 2; | |
3491 | if ((scan > p->pr_psargs) && (*scan == ' ')) | |
3492 | { | |
3493 | *scan = '\000'; | |
3494 | } | |
3495 | return p->pr_psargs; | |
3496 | } | |
3497 | #endif | |
3498 | return NULL; | |
3499 | } | |
244ffee7 | 3500 | |
32090b8e KR |
3501 | /* Return the number of the signal that caused the core dump. Presumably, |
3502 | since we have a core file, we got a signal of some kind, so don't bother | |
3503 | checking the other process status fields, just return the signal number. | |
3504 | */ | |
244ffee7 | 3505 | |
32090b8e | 3506 | int |
1c6042ee ILT |
3507 | elf_core_file_failing_signal (abfd) |
3508 | bfd *abfd; | |
32090b8e KR |
3509 | { |
3510 | #ifdef HAVE_PROCFS | |
3511 | if (core_prstatus (abfd)) | |
3512 | { | |
3513 | return ((prstatus_t *) (core_prstatus (abfd)))->pr_cursig; | |
3514 | } | |
3515 | #endif | |
3516 | return -1; | |
3517 | } | |
244ffee7 | 3518 | |
32090b8e KR |
3519 | /* Check to see if the core file could reasonably be expected to have |
3520 | come for the current executable file. Note that by default we return | |
3521 | true unless we find something that indicates that there might be a | |
3522 | problem. | |
3523 | */ | |
244ffee7 | 3524 | |
32090b8e | 3525 | boolean |
1c6042ee ILT |
3526 | elf_core_file_matches_executable_p (core_bfd, exec_bfd) |
3527 | bfd *core_bfd; | |
3528 | bfd *exec_bfd; | |
32090b8e KR |
3529 | { |
3530 | #ifdef HAVE_PROCFS | |
3531 | char *corename; | |
3532 | char *execname; | |
3533 | #endif | |
244ffee7 | 3534 | |
32090b8e KR |
3535 | /* First, xvecs must match since both are ELF files for the same target. */ |
3536 | ||
3537 | if (core_bfd->xvec != exec_bfd->xvec) | |
244ffee7 | 3538 | { |
d1ad85a6 | 3539 | bfd_set_error (bfd_error_system_call); |
244ffee7 JK |
3540 | return false; |
3541 | } | |
3542 | ||
32090b8e | 3543 | #ifdef HAVE_PROCFS |
244ffee7 | 3544 | |
32090b8e KR |
3545 | /* If no prpsinfo, just return true. Otherwise, grab the last component |
3546 | of the exec'd pathname from the prpsinfo. */ | |
244ffee7 | 3547 | |
32090b8e | 3548 | if (core_prpsinfo (core_bfd)) |
244ffee7 | 3549 | { |
32090b8e KR |
3550 | corename = (((struct prpsinfo *) core_prpsinfo (core_bfd))->pr_fname); |
3551 | } | |
3552 | else | |
3553 | { | |
3554 | return true; | |
3555 | } | |
244ffee7 | 3556 | |
32090b8e | 3557 | /* Find the last component of the executable pathname. */ |
244ffee7 | 3558 | |
32090b8e KR |
3559 | if ((execname = strrchr (exec_bfd->filename, '/')) != NULL) |
3560 | { | |
3561 | execname++; | |
3562 | } | |
3563 | else | |
3564 | { | |
3565 | execname = (char *) exec_bfd->filename; | |
3566 | } | |
244ffee7 | 3567 | |
32090b8e | 3568 | /* See if they match */ |
244ffee7 | 3569 | |
32090b8e | 3570 | return strcmp (execname, corename) ? false : true; |
244ffee7 | 3571 | |
32090b8e | 3572 | #else |
244ffee7 | 3573 | |
244ffee7 | 3574 | return true; |
244ffee7 | 3575 | |
32090b8e KR |
3576 | #endif /* HAVE_PROCFS */ |
3577 | } | |
244ffee7 | 3578 | |
32090b8e KR |
3579 | /* ELF core files contain a segment of type PT_NOTE, that holds much of |
3580 | the information that would normally be available from the /proc interface | |
3581 | for the process, at the time the process dumped core. Currently this | |
3582 | includes copies of the prstatus, prpsinfo, and fpregset structures. | |
244ffee7 | 3583 | |
32090b8e KR |
3584 | Since these structures are potentially machine dependent in size and |
3585 | ordering, bfd provides two levels of support for them. The first level, | |
3586 | available on all machines since it does not require that the host | |
3587 | have /proc support or the relevant include files, is to create a bfd | |
3588 | section for each of the prstatus, prpsinfo, and fpregset structures, | |
3589 | without any interpretation of their contents. With just this support, | |
3590 | the bfd client will have to interpret the structures itself. Even with | |
3591 | /proc support, it might want these full structures for it's own reasons. | |
244ffee7 | 3592 | |
32090b8e KR |
3593 | In the second level of support, where HAVE_PROCFS is defined, bfd will |
3594 | pick apart the structures to gather some additional information that | |
3595 | clients may want, such as the general register set, the name of the | |
3596 | exec'ed file and its arguments, the signal (if any) that caused the | |
3597 | core dump, etc. | |
244ffee7 | 3598 | |
32090b8e | 3599 | */ |
244ffee7 | 3600 | |
32090b8e | 3601 | static boolean |
1c6042ee ILT |
3602 | elf_corefile_note (abfd, hdr) |
3603 | bfd *abfd; | |
3604 | Elf_Internal_Phdr *hdr; | |
244ffee7 | 3605 | { |
32090b8e KR |
3606 | Elf_External_Note *x_note_p; /* Elf note, external form */ |
3607 | Elf_Internal_Note i_note; /* Elf note, internal form */ | |
3608 | char *buf = NULL; /* Entire note segment contents */ | |
3609 | char *namedata; /* Name portion of the note */ | |
3610 | char *descdata; /* Descriptor portion of the note */ | |
3611 | char *sectname; /* Name to use for new section */ | |
3612 | long filepos; /* File offset to descriptor data */ | |
3613 | asection *newsect; | |
3614 | ||
3615 | if (hdr->p_filesz > 0 | |
b9d5cdf0 | 3616 | && (buf = (char *) malloc (hdr->p_filesz)) != NULL |
32090b8e KR |
3617 | && bfd_seek (abfd, hdr->p_offset, SEEK_SET) != -1 |
3618 | && bfd_read ((PTR) buf, hdr->p_filesz, 1, abfd) == hdr->p_filesz) | |
3619 | { | |
3620 | x_note_p = (Elf_External_Note *) buf; | |
3621 | while ((char *) x_note_p < (buf + hdr->p_filesz)) | |
3622 | { | |
3623 | i_note.namesz = bfd_h_get_32 (abfd, (bfd_byte *) x_note_p->namesz); | |
3624 | i_note.descsz = bfd_h_get_32 (abfd, (bfd_byte *) x_note_p->descsz); | |
3625 | i_note.type = bfd_h_get_32 (abfd, (bfd_byte *) x_note_p->type); | |
3626 | namedata = x_note_p->name; | |
3627 | descdata = namedata + BFD_ALIGN (i_note.namesz, 4); | |
3628 | filepos = hdr->p_offset + (descdata - buf); | |
3629 | switch (i_note.type) | |
3630 | { | |
3631 | case NT_PRSTATUS: | |
3632 | /* process descdata as prstatus info */ | |
2e03ce18 ILT |
3633 | if (! bfd_prstatus (abfd, descdata, i_note.descsz, filepos)) |
3634 | return false; | |
32090b8e KR |
3635 | sectname = ".prstatus"; |
3636 | break; | |
3637 | case NT_FPREGSET: | |
3638 | /* process descdata as fpregset info */ | |
2e03ce18 ILT |
3639 | if (! bfd_fpregset (abfd, descdata, i_note.descsz, filepos)) |
3640 | return false; | |
32090b8e KR |
3641 | sectname = ".fpregset"; |
3642 | break; | |
3643 | case NT_PRPSINFO: | |
3644 | /* process descdata as prpsinfo */ | |
2e03ce18 ILT |
3645 | if (! bfd_prpsinfo (abfd, descdata, i_note.descsz, filepos)) |
3646 | return false; | |
32090b8e KR |
3647 | sectname = ".prpsinfo"; |
3648 | break; | |
3649 | default: | |
3650 | /* Unknown descriptor, just ignore it. */ | |
3651 | sectname = NULL; | |
3652 | break; | |
3653 | } | |
3654 | if (sectname != NULL) | |
3655 | { | |
3656 | newsect = bfd_make_section (abfd, sectname); | |
2e03ce18 ILT |
3657 | if (newsect == NULL) |
3658 | return false; | |
32090b8e KR |
3659 | newsect->_raw_size = i_note.descsz; |
3660 | newsect->filepos = filepos; | |
3661 | newsect->flags = SEC_ALLOC | SEC_HAS_CONTENTS; | |
3662 | newsect->alignment_power = 2; | |
3663 | } | |
3664 | x_note_p = (Elf_External_Note *) | |
3665 | (descdata + BFD_ALIGN (i_note.descsz, 4)); | |
3666 | } | |
3667 | } | |
3668 | if (buf != NULL) | |
3669 | { | |
3670 | free (buf); | |
3671 | } | |
b9d5cdf0 DM |
3672 | else if (hdr->p_filesz > 0) |
3673 | { | |
d1ad85a6 | 3674 | bfd_set_error (bfd_error_no_memory); |
b9d5cdf0 DM |
3675 | return false; |
3676 | } | |
32090b8e | 3677 | return true; |
244ffee7 | 3678 | |
244ffee7 JK |
3679 | } |
3680 | ||
32090b8e KR |
3681 | /* Core files are simply standard ELF formatted files that partition |
3682 | the file using the execution view of the file (program header table) | |
3683 | rather than the linking view. In fact, there is no section header | |
3684 | table in a core file. | |
3685 | ||
3686 | The process status information (including the contents of the general | |
3687 | register set) and the floating point register set are stored in a | |
3688 | segment of type PT_NOTE. We handcraft a couple of extra bfd sections | |
3689 | that allow standard bfd access to the general registers (.reg) and the | |
3690 | floating point registers (.reg2). | |
3691 | ||
3692 | */ | |
3693 | ||
2f3508ad | 3694 | const bfd_target * |
1c6042ee ILT |
3695 | elf_core_file_p (abfd) |
3696 | bfd *abfd; | |
244ffee7 | 3697 | { |
32090b8e KR |
3698 | Elf_External_Ehdr x_ehdr; /* Elf file header, external form */ |
3699 | Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */ | |
3700 | Elf_External_Phdr x_phdr; /* Program header table entry, external form */ | |
3701 | Elf_Internal_Phdr *i_phdrp; /* Program header table, internal form */ | |
3702 | unsigned int phindex; | |
d6439785 | 3703 | struct elf_backend_data *ebd; |
244ffee7 | 3704 | |
32090b8e KR |
3705 | /* Read in the ELF header in external format. */ |
3706 | ||
3707 | if (bfd_read ((PTR) & x_ehdr, sizeof (x_ehdr), 1, abfd) != sizeof (x_ehdr)) | |
244ffee7 | 3708 | { |
25057836 JL |
3709 | if (bfd_get_error () != bfd_error_system_call) |
3710 | bfd_set_error (bfd_error_wrong_format); | |
244ffee7 JK |
3711 | return NULL; |
3712 | } | |
32090b8e KR |
3713 | |
3714 | /* Now check to see if we have a valid ELF file, and one that BFD can | |
3715 | make use of. The magic number must match, the address size ('class') | |
3716 | and byte-swapping must match our XVEC entry, and it must have a | |
3717 | program header table (FIXME: See comments re segments at top of this | |
3718 | file). */ | |
3719 | ||
3720 | if (elf_file_p (&x_ehdr) == false) | |
244ffee7 | 3721 | { |
32090b8e | 3722 | wrong: |
d1ad85a6 | 3723 | bfd_set_error (bfd_error_wrong_format); |
32090b8e | 3724 | return NULL; |
244ffee7 | 3725 | } |
244ffee7 | 3726 | |
32090b8e | 3727 | /* FIXME, Check EI_VERSION here ! */ |
244ffee7 | 3728 | |
32090b8e KR |
3729 | { |
3730 | #if ARCH_SIZE == 32 | |
3731 | int desired_address_size = ELFCLASS32; | |
3732 | #endif | |
3733 | #if ARCH_SIZE == 64 | |
3734 | int desired_address_size = ELFCLASS64; | |
3735 | #endif | |
3736 | ||
3737 | if (x_ehdr.e_ident[EI_CLASS] != desired_address_size) | |
3738 | goto wrong; | |
3739 | } | |
3740 | ||
3741 | /* Switch xvec to match the specified byte order. */ | |
3742 | switch (x_ehdr.e_ident[EI_DATA]) | |
244ffee7 | 3743 | { |
32090b8e KR |
3744 | case ELFDATA2MSB: /* Big-endian */ |
3745 | if (abfd->xvec->byteorder_big_p == false) | |
3746 | goto wrong; | |
244ffee7 | 3747 | break; |
32090b8e KR |
3748 | case ELFDATA2LSB: /* Little-endian */ |
3749 | if (abfd->xvec->byteorder_big_p == true) | |
3750 | goto wrong; | |
244ffee7 | 3751 | break; |
32090b8e KR |
3752 | case ELFDATANONE: /* No data encoding specified */ |
3753 | default: /* Unknown data encoding specified */ | |
3754 | goto wrong; | |
244ffee7 JK |
3755 | } |
3756 | ||
32090b8e KR |
3757 | /* Allocate an instance of the elf_obj_tdata structure and hook it up to |
3758 | the tdata pointer in the bfd. */ | |
244ffee7 | 3759 | |
32090b8e KR |
3760 | elf_tdata (abfd) = |
3761 | (struct elf_obj_tdata *) bfd_zalloc (abfd, sizeof (struct elf_obj_tdata)); | |
3762 | if (elf_tdata (abfd) == NULL) | |
244ffee7 | 3763 | { |
d1ad85a6 | 3764 | bfd_set_error (bfd_error_no_memory); |
32090b8e | 3765 | return NULL; |
244ffee7 | 3766 | } |
244ffee7 | 3767 | |
32090b8e | 3768 | /* FIXME, `wrong' returns from this point onward, leak memory. */ |
244ffee7 | 3769 | |
32090b8e KR |
3770 | /* Now that we know the byte order, swap in the rest of the header */ |
3771 | i_ehdrp = elf_elfheader (abfd); | |
3772 | elf_swap_ehdr_in (abfd, &x_ehdr, i_ehdrp); | |
3773 | #if DEBUG & 1 | |
3774 | elf_debug_file (i_ehdrp); | |
3775 | #endif | |
244ffee7 | 3776 | |
d6439785 JL |
3777 | ebd = get_elf_backend_data (abfd); |
3778 | ||
3779 | /* Check that the ELF e_machine field matches what this particular | |
3780 | BFD format expects. */ | |
3781 | if (ebd->elf_machine_code != i_ehdrp->e_machine) | |
3782 | { | |
2f3508ad | 3783 | const bfd_target * const *target_ptr; |
d6439785 JL |
3784 | |
3785 | if (ebd->elf_machine_code != EM_NONE) | |
3786 | goto wrong; | |
3787 | ||
3788 | /* This is the generic ELF target. Let it match any ELF target | |
3789 | for which we do not have a specific backend. */ | |
3790 | for (target_ptr = bfd_target_vector; *target_ptr != NULL; target_ptr++) | |
3791 | { | |
3792 | struct elf_backend_data *back; | |
3793 | ||
3794 | if ((*target_ptr)->flavour != bfd_target_elf_flavour) | |
3795 | continue; | |
3796 | back = (struct elf_backend_data *) (*target_ptr)->backend_data; | |
3797 | if (back->elf_machine_code == i_ehdrp->e_machine) | |
3798 | { | |
3799 | /* target_ptr is an ELF backend which matches this | |
3800 | object file, so reject the generic ELF target. */ | |
3801 | goto wrong; | |
3802 | } | |
3803 | } | |
3804 | } | |
3805 | ||
32090b8e KR |
3806 | /* If there is no program header, or the type is not a core file, then |
3807 | we are hosed. */ | |
3808 | if (i_ehdrp->e_phoff == 0 || i_ehdrp->e_type != ET_CORE) | |
3809 | goto wrong; | |
244ffee7 | 3810 | |
32090b8e KR |
3811 | /* Allocate space for a copy of the program header table in |
3812 | internal form, seek to the program header table in the file, | |
3813 | read it in, and convert it to internal form. As a simple sanity | |
3814 | check, verify that the what BFD thinks is the size of each program | |
3815 | header table entry actually matches the size recorded in the file. */ | |
3816 | ||
3817 | if (i_ehdrp->e_phentsize != sizeof (x_phdr)) | |
3818 | goto wrong; | |
3819 | i_phdrp = (Elf_Internal_Phdr *) | |
3820 | bfd_alloc (abfd, sizeof (*i_phdrp) * i_ehdrp->e_phnum); | |
3821 | if (!i_phdrp) | |
244ffee7 | 3822 | { |
d1ad85a6 | 3823 | bfd_set_error (bfd_error_no_memory); |
32090b8e KR |
3824 | return NULL; |
3825 | } | |
3826 | if (bfd_seek (abfd, i_ehdrp->e_phoff, SEEK_SET) == -1) | |
25057836 | 3827 | return NULL; |
32090b8e KR |
3828 | for (phindex = 0; phindex < i_ehdrp->e_phnum; phindex++) |
3829 | { | |
3830 | if (bfd_read ((PTR) & x_phdr, sizeof (x_phdr), 1, abfd) | |
3831 | != sizeof (x_phdr)) | |
25057836 | 3832 | return NULL; |
32090b8e | 3833 | elf_swap_phdr_in (abfd, &x_phdr, i_phdrp + phindex); |
244ffee7 JK |
3834 | } |
3835 | ||
32090b8e KR |
3836 | /* Once all of the program headers have been read and converted, we |
3837 | can start processing them. */ | |
244ffee7 | 3838 | |
32090b8e KR |
3839 | for (phindex = 0; phindex < i_ehdrp->e_phnum; phindex++) |
3840 | { | |
3841 | bfd_section_from_phdr (abfd, i_phdrp + phindex, phindex); | |
3842 | if ((i_phdrp + phindex)->p_type == PT_NOTE) | |
3843 | { | |
2e03ce18 ILT |
3844 | if (! elf_corefile_note (abfd, i_phdrp + phindex)) |
3845 | return NULL; | |
32090b8e KR |
3846 | } |
3847 | } | |
244ffee7 | 3848 | |
32090b8e | 3849 | /* Remember the entry point specified in the ELF file header. */ |
244ffee7 | 3850 | |
32090b8e | 3851 | bfd_get_start_address (abfd) = i_ehdrp->e_entry; |
244ffee7 | 3852 | |
32090b8e | 3853 | return abfd->xvec; |
244ffee7 | 3854 | } |
6ec3bb6a ILT |
3855 | \f |
3856 | /* ELF linker code. */ | |
3857 | ||
3858 | static boolean elf_link_add_object_symbols | |
3859 | PARAMS ((bfd *, struct bfd_link_info *)); | |
3860 | static boolean elf_link_add_archive_symbols | |
3861 | PARAMS ((bfd *, struct bfd_link_info *)); | |
013dec1a ILT |
3862 | static INLINE boolean elf_link_record_dynamic_symbol |
3863 | PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *)); | |
3864 | static boolean elf_link_create_dynamic_sections | |
3865 | PARAMS ((bfd *, struct bfd_link_info *)); | |
3866 | static boolean elf_adjust_dynamic_symbol | |
3867 | PARAMS ((struct elf_link_hash_entry *, PTR)); | |
6ec3bb6a ILT |
3868 | |
3869 | /* Given an ELF BFD, add symbols to the global hash table as | |
3870 | appropriate. */ | |
3871 | ||
3872 | boolean | |
3873 | elf_bfd_link_add_symbols (abfd, info) | |
3874 | bfd *abfd; | |
3875 | struct bfd_link_info *info; | |
3876 | { | |
3877 | switch (bfd_get_format (abfd)) | |
3878 | { | |
3879 | case bfd_object: | |
3880 | return elf_link_add_object_symbols (abfd, info); | |
3881 | case bfd_archive: | |
3882 | return elf_link_add_archive_symbols (abfd, info); | |
3883 | default: | |
3884 | bfd_set_error (bfd_error_wrong_format); | |
3885 | return false; | |
3886 | } | |
3887 | } | |
3888 | ||
3889 | /* Add symbols from an ELF archive file to the linker hash table. We | |
3890 | don't use _bfd_generic_link_add_archive_symbols because of a | |
3891 | problem which arises on UnixWare. The UnixWare libc.so is an | |
3892 | archive which includes an entry libc.so.1 which defines a bunch of | |
3893 | symbols. The libc.so archive also includes a number of other | |
3894 | object files, which also define symbols, some of which are the same | |
3895 | as those defined in libc.so.1. Correct linking requires that we | |
3896 | consider each object file in turn, and include it if it defines any | |
3897 | symbols we need. _bfd_generic_link_add_archive_symbols does not do | |
3898 | this; it looks through the list of undefined symbols, and includes | |
3899 | any object file which defines them. When this algorithm is used on | |
3900 | UnixWare, it winds up pulling in libc.so.1 early and defining a | |
3901 | bunch of symbols. This means that some of the other objects in the | |
3902 | archive are not included in the link, which is incorrect since they | |
3903 | precede libc.so.1 in the archive. | |
3904 | ||
3905 | Fortunately, ELF archive handling is simpler than that done by | |
3906 | _bfd_generic_link_add_archive_symbols, which has to allow for a.out | |
3907 | oddities. In ELF, if we find a symbol in the archive map, and the | |
3908 | symbol is currently undefined, we know that we must pull in that | |
3909 | object file. | |
3910 | ||
3911 | Unfortunately, we do have to make multiple passes over the symbol | |
3912 | table until nothing further is resolved. */ | |
3913 | ||
3914 | static boolean | |
3915 | elf_link_add_archive_symbols (abfd, info) | |
3916 | bfd *abfd; | |
3917 | struct bfd_link_info *info; | |
3918 | { | |
3919 | symindex c; | |
3920 | boolean *defined = NULL; | |
3921 | boolean *included = NULL; | |
3922 | carsym *symdefs; | |
3923 | boolean loop; | |
3924 | ||
3925 | if (! bfd_has_map (abfd)) | |
3926 | { | |
3927 | bfd_set_error (bfd_error_no_symbols); | |
3928 | return false; | |
3929 | } | |
3930 | ||
3931 | /* Keep track of all symbols we know to be already defined, and all | |
3932 | files we know to be already included. This is to speed up the | |
3933 | second and subsequent passes. */ | |
3934 | c = bfd_ardata (abfd)->symdef_count; | |
3935 | if (c == 0) | |
3936 | return true; | |
3937 | defined = (boolean *) malloc (c * sizeof (boolean)); | |
3938 | included = (boolean *) malloc (c * sizeof (boolean)); | |
3939 | if (defined == (boolean *) NULL || included == (boolean *) NULL) | |
3940 | { | |
3941 | bfd_set_error (bfd_error_no_memory); | |
3942 | goto error_return; | |
3943 | } | |
3944 | memset (defined, 0, c * sizeof (boolean)); | |
3945 | memset (included, 0, c * sizeof (boolean)); | |
3946 | ||
3947 | symdefs = bfd_ardata (abfd)->symdefs; | |
3948 | ||
3949 | do | |
3950 | { | |
3951 | file_ptr last; | |
3952 | symindex i; | |
3953 | carsym *symdef; | |
3954 | carsym *symdefend; | |
3955 | ||
3956 | loop = false; | |
3957 | last = -1; | |
3958 | ||
3959 | symdef = symdefs; | |
3960 | symdefend = symdef + c; | |
3961 | for (i = 0; symdef < symdefend; symdef++, i++) | |
3962 | { | |
3963 | struct elf_link_hash_entry *h; | |
3964 | bfd *element; | |
3965 | struct bfd_link_hash_entry *undefs_tail; | |
3966 | symindex mark; | |
3967 | ||
3968 | if (defined[i] || included[i]) | |
3969 | continue; | |
3970 | if (symdef->file_offset == last) | |
3971 | { | |
3972 | included[i] = true; | |
3973 | continue; | |
3974 | } | |
3975 | ||
3976 | h = elf_link_hash_lookup (elf_hash_table (info), symdef->name, | |
3977 | false, false, false); | |
3978 | if (h == (struct elf_link_hash_entry *) NULL) | |
3979 | continue; | |
3980 | if (h->root.type != bfd_link_hash_undefined) | |
3981 | { | |
3982 | defined[i] = true; | |
3983 | continue; | |
3984 | } | |
3985 | ||
3986 | /* We need to include this archive member. */ | |
3987 | ||
3988 | element = _bfd_get_elt_at_filepos (abfd, symdef->file_offset); | |
3989 | if (element == (bfd *) NULL) | |
3990 | goto error_return; | |
3991 | ||
3992 | if (! bfd_check_format (element, bfd_object)) | |
3993 | goto error_return; | |
3994 | ||
3995 | /* Doublecheck that we have not included this object | |
3996 | already--it should be impossible, but there may be | |
3997 | something wrong with the archive. */ | |
3998 | if (element->archive_pass != 0) | |
3999 | { | |
4000 | bfd_set_error (bfd_error_bad_value); | |
4001 | goto error_return; | |
4002 | } | |
4003 | element->archive_pass = 1; | |
4004 | ||
4005 | undefs_tail = info->hash->undefs_tail; | |
4006 | ||
4007 | if (! (*info->callbacks->add_archive_element) (info, element, | |
4008 | symdef->name)) | |
4009 | goto error_return; | |
4010 | if (! elf_link_add_object_symbols (element, info)) | |
4011 | goto error_return; | |
4012 | ||
4013 | /* If there are any new undefined symbols, we need to make | |
4014 | another pass through the archive in order to see whether | |
4015 | they can be defined. FIXME: This isn't perfect, because | |
4016 | common symbols wind up on undefs_tail and because an | |
4017 | undefined symbol which is defined later on in this pass | |
4018 | does not require another pass. This isn't a bug, but it | |
4019 | does make the code less efficient than it could be. */ | |
4020 | if (undefs_tail != info->hash->undefs_tail) | |
4021 | loop = true; | |
4022 | ||
4023 | /* Look backward to mark all symbols from this object file | |
4024 | which we have already seen in this pass. */ | |
4025 | mark = i; | |
4026 | do | |
4027 | { | |
4028 | included[mark] = true; | |
4029 | if (mark == 0) | |
4030 | break; | |
4031 | --mark; | |
4032 | } | |
4033 | while (symdefs[mark].file_offset == symdef->file_offset); | |
4034 | ||
4035 | /* We mark subsequent symbols from this object file as we go | |
4036 | on through the loop. */ | |
4037 | last = symdef->file_offset; | |
4038 | } | |
4039 | } | |
4040 | while (loop); | |
4041 | ||
4042 | free (defined); | |
4043 | free (included); | |
4044 | ||
4045 | return true; | |
4046 | ||
4047 | error_return: | |
4048 | if (defined != (boolean *) NULL) | |
4049 | free (defined); | |
4050 | if (included != (boolean *) NULL) | |
4051 | free (included); | |
4052 | return false; | |
4053 | } | |
4054 | ||
013dec1a ILT |
4055 | /* Record a new dynamic symbol. We record the dynamic symbols as we |
4056 | read the input files, since we need to have a list of all of them | |
4057 | before we can determine the final sizes of the output sections. */ | |
4058 | ||
4059 | static INLINE boolean | |
4060 | elf_link_record_dynamic_symbol (info, h) | |
4061 | struct bfd_link_info *info; | |
4062 | struct elf_link_hash_entry *h; | |
4063 | { | |
4064 | if (h->dynindx == -1) | |
4065 | { | |
4066 | h->dynindx = elf_hash_table (info)->dynsymcount; | |
4067 | ++elf_hash_table (info)->dynsymcount; | |
4068 | h->dynstr_index = bfd_add_to_strtab (elf_hash_table (info)->dynobj, | |
4069 | elf_hash_table (info)->dynstr, | |
4070 | h->root.root.string); | |
4071 | if (h->dynstr_index == (unsigned long) -1) | |
4072 | return false; | |
4073 | } | |
4074 | ||
4075 | return true; | |
4076 | } | |
4077 | ||
6ec3bb6a ILT |
4078 | /* Add symbols from an ELF object file to the linker hash table. */ |
4079 | ||
4080 | static boolean | |
4081 | elf_link_add_object_symbols (abfd, info) | |
4082 | bfd *abfd; | |
4083 | struct bfd_link_info *info; | |
4084 | { | |
4085 | boolean (*add_symbol_hook) PARAMS ((bfd *, struct bfd_link_info *, | |
4086 | const Elf_Internal_Sym *, | |
4087 | const char **, flagword *, | |
4088 | asection **, bfd_vma *)); | |
4089 | boolean collect; | |
4090 | Elf_Internal_Shdr *hdr; | |
4091 | size_t symcount; | |
4092 | size_t extsymcount; | |
5315c428 | 4093 | size_t extsymoff; |
6ec3bb6a ILT |
4094 | Elf_External_Sym *buf = NULL; |
4095 | struct elf_link_hash_entry **sym_hash; | |
013dec1a ILT |
4096 | boolean dynamic; |
4097 | Elf_External_Dyn *dynbuf = NULL; | |
4098 | struct elf_link_hash_entry *weaks; | |
6ec3bb6a ILT |
4099 | Elf_External_Sym *esym; |
4100 | Elf_External_Sym *esymend; | |
4101 | ||
4102 | add_symbol_hook = get_elf_backend_data (abfd)->elf_add_symbol_hook; | |
4103 | collect = get_elf_backend_data (abfd)->collect; | |
4104 | ||
4105 | hdr = &elf_tdata (abfd)->symtab_hdr; | |
4106 | symcount = hdr->sh_size / sizeof (Elf_External_Sym); | |
4107 | ||
4108 | /* The sh_info field of the symtab header tells us where the | |
4109 | external symbols start. We don't care about the local symbols at | |
4110 | this point. */ | |
5315c428 ILT |
4111 | if (elf_bad_symtab (abfd)) |
4112 | { | |
4113 | extsymcount = symcount; | |
4114 | extsymoff = 0; | |
4115 | } | |
4116 | else | |
4117 | { | |
4118 | extsymcount = symcount - hdr->sh_info; | |
4119 | extsymoff = hdr->sh_info; | |
4120 | } | |
6ec3bb6a ILT |
4121 | |
4122 | buf = (Elf_External_Sym *) malloc (extsymcount * sizeof (Elf_External_Sym)); | |
4123 | if (buf == NULL && extsymcount != 0) | |
4124 | { | |
4125 | bfd_set_error (bfd_error_no_memory); | |
4126 | goto error_return; | |
4127 | } | |
4128 | ||
013dec1a ILT |
4129 | /* We store a pointer to the hash table entry for each external |
4130 | symbol. */ | |
6ec3bb6a ILT |
4131 | sym_hash = ((struct elf_link_hash_entry **) |
4132 | bfd_alloc (abfd, | |
4133 | extsymcount * sizeof (struct elf_link_hash_entry *))); | |
4134 | if (sym_hash == NULL) | |
4135 | { | |
4136 | bfd_set_error (bfd_error_no_memory); | |
4137 | goto error_return; | |
4138 | } | |
4139 | elf_sym_hashes (abfd) = sym_hash; | |
4140 | ||
013dec1a | 4141 | if (elf_elfheader (abfd)->e_type != ET_DYN) |
8af74670 ILT |
4142 | { |
4143 | dynamic = false; | |
4144 | ||
4145 | /* If we are creating a shared library, create all the dynamic | |
4146 | sections immediately. We need to attach them to something, | |
4147 | so we attach them to this BFD, provided it is the right | |
4148 | format. FIXME: If there are no input BFD's of the same | |
4149 | format as the output, we can't make a shared library. */ | |
4150 | if (info->shared | |
4151 | && elf_hash_table (info)->dynobj == NULL | |
4152 | && abfd->xvec == info->hash->creator) | |
4153 | { | |
4154 | if (! elf_link_create_dynamic_sections (abfd, info)) | |
4155 | goto error_return; | |
4156 | elf_hash_table (info)->dynobj = abfd; | |
4157 | } | |
4158 | } | |
013dec1a ILT |
4159 | else |
4160 | { | |
4161 | asection *s; | |
4162 | const char *name; | |
4163 | unsigned long strindex; | |
4164 | ||
4165 | dynamic = true; | |
4166 | ||
4167 | /* You can't use -r against a dynamic object. There's no hope | |
4168 | of using a dynamic object which does not exactly match the | |
4169 | format of the output file. */ | |
4170 | if (info->relocateable | |
4171 | || info->hash->creator != abfd->xvec) | |
4172 | { | |
4173 | bfd_set_error (bfd_error_invalid_operation); | |
4174 | goto error_return; | |
4175 | } | |
4176 | ||
4177 | /* Find the name to use in a DT_NEEDED entry that refers to this | |
4178 | object. If the object has a DT_SONAME entry, we use it. | |
c1f84521 ILT |
4179 | Otherwise, if the generic linker stuck something in |
4180 | elf_dt_needed_name, we use that. Otherwise, we just use the | |
4181 | file name. */ | |
013dec1a | 4182 | name = bfd_get_filename (abfd); |
c1f84521 ILT |
4183 | if (elf_dt_needed_name (abfd) != NULL) |
4184 | name = elf_dt_needed_name (abfd); | |
013dec1a ILT |
4185 | s = bfd_get_section_by_name (abfd, ".dynamic"); |
4186 | if (s != NULL) | |
4187 | { | |
4188 | Elf_External_Dyn *extdyn; | |
4189 | Elf_External_Dyn *extdynend; | |
4190 | ||
4191 | dynbuf = (Elf_External_Dyn *) malloc (s->_raw_size); | |
4192 | if (dynbuf == NULL) | |
4193 | { | |
4194 | bfd_set_error (bfd_error_no_memory); | |
4195 | goto error_return; | |
4196 | } | |
4197 | ||
4198 | if (! bfd_get_section_contents (abfd, s, (PTR) dynbuf, | |
4199 | (file_ptr) 0, s->_raw_size)) | |
4200 | goto error_return; | |
4201 | ||
4202 | extdyn = dynbuf; | |
4203 | extdynend = extdyn + s->_raw_size / sizeof (Elf_External_Dyn); | |
4204 | for (; extdyn < extdynend; extdyn++) | |
4205 | { | |
4206 | Elf_Internal_Dyn dyn; | |
4207 | ||
4208 | elf_swap_dyn_in (abfd, extdyn, &dyn); | |
4209 | if (dyn.d_tag == DT_SONAME) | |
4210 | { | |
4211 | int elfsec; | |
4212 | unsigned long link; | |
4213 | ||
4214 | elfsec = elf_section_from_bfd_section (abfd, s); | |
4215 | if (elfsec == -1) | |
4216 | goto error_return; | |
4217 | link = elf_elfsections (abfd)[elfsec]->sh_link; | |
4218 | name = elf_string_from_elf_section (abfd, link, | |
4219 | dyn.d_un.d_val); | |
4220 | if (name == NULL) | |
4221 | goto error_return; | |
4222 | ||
4223 | break; | |
4224 | } | |
4225 | } | |
4226 | ||
4227 | free (dynbuf); | |
4228 | dynbuf = NULL; | |
4229 | } | |
4230 | ||
4231 | /* We do not want to include any of the sections in a dynamic | |
4232 | object in the output file. We hack by simply clobbering the | |
4233 | list of sections in the BFD. This could be handled more | |
4234 | cleanly by, say, a new section flag; the existing | |
4235 | SEC_NEVER_LOAD flag is not the one we want, because that one | |
4236 | still implies that the section takes up space in the output | |
4237 | file. */ | |
4238 | abfd->sections = NULL; | |
4239 | ||
4240 | /* If this is the first dynamic object found in the link, create | |
4241 | the special sections required for dynamic linking. We need | |
4242 | to put them somewhere, and attaching them to the first | |
4243 | dynamic object is as good place as any. */ | |
4244 | if (elf_hash_table (info)->dynobj == NULL) | |
4245 | { | |
4246 | if (! elf_link_create_dynamic_sections (abfd, info)) | |
4247 | goto error_return; | |
4248 | elf_hash_table (info)->dynobj = abfd; | |
4249 | } | |
4250 | ||
4251 | /* Add a DT_NEEDED entry for this dynamic object. */ | |
4252 | strindex = bfd_add_to_strtab (abfd, | |
4253 | elf_hash_table (info)->dynstr, | |
4254 | name); | |
4255 | ||
4256 | if (strindex == (unsigned long) -1) | |
4257 | goto error_return; | |
4258 | if (! elf_add_dynamic_entry (info, DT_NEEDED, strindex)) | |
4259 | goto error_return; | |
4260 | } | |
4261 | ||
6ec3bb6a | 4262 | if (bfd_seek (abfd, |
5315c428 | 4263 | hdr->sh_offset + extsymoff * sizeof (Elf_External_Sym), |
6ec3bb6a ILT |
4264 | SEEK_SET) != 0 |
4265 | || (bfd_read ((PTR) buf, sizeof (Elf_External_Sym), extsymcount, abfd) | |
4266 | != extsymcount * sizeof (Elf_External_Sym))) | |
4267 | goto error_return; | |
4268 | ||
013dec1a ILT |
4269 | weaks = NULL; |
4270 | ||
6ec3bb6a ILT |
4271 | esymend = buf + extsymcount; |
4272 | for (esym = buf; esym < esymend; esym++, sym_hash++) | |
4273 | { | |
4274 | Elf_Internal_Sym sym; | |
4275 | int bind; | |
4276 | bfd_vma value; | |
4277 | asection *sec; | |
4278 | flagword flags; | |
4279 | const char *name; | |
013dec1a ILT |
4280 | struct elf_link_hash_entry *h = NULL; |
4281 | boolean definition; | |
6ec3bb6a ILT |
4282 | |
4283 | elf_swap_symbol_in (abfd, esym, &sym); | |
4284 | ||
4285 | flags = BSF_NO_FLAGS; | |
4286 | sec = NULL; | |
4287 | value = sym.st_value; | |
4288 | *sym_hash = NULL; | |
4289 | ||
4290 | bind = ELF_ST_BIND (sym.st_info); | |
4291 | if (bind == STB_LOCAL) | |
4292 | { | |
4293 | /* This should be impossible, since ELF requires that all | |
4294 | global symbols follow all local symbols, and that sh_info | |
5315c428 ILT |
4295 | point to the first global symbol. Unfortunatealy, Irix 5 |
4296 | screws this up. */ | |
4297 | continue; | |
6ec3bb6a ILT |
4298 | } |
4299 | else if (bind == STB_GLOBAL) | |
4300 | flags = BSF_GLOBAL; | |
4301 | else if (bind == STB_WEAK) | |
4302 | flags = BSF_WEAK; | |
4303 | else | |
4304 | { | |
4305 | /* Leave it up to the processor backend. */ | |
4306 | } | |
4307 | ||
4308 | if (sym.st_shndx == SHN_UNDEF) | |
badd23e3 | 4309 | sec = bfd_und_section_ptr; |
6ec3bb6a ILT |
4310 | else if (sym.st_shndx > 0 && sym.st_shndx < SHN_LORESERVE) |
4311 | { | |
4312 | sec = section_from_elf_index (abfd, sym.st_shndx); | |
4313 | if (sec == NULL) | |
4314 | goto error_return; | |
4315 | value -= sec->vma; | |
4316 | } | |
4317 | else if (sym.st_shndx == SHN_ABS) | |
badd23e3 | 4318 | sec = bfd_abs_section_ptr; |
6ec3bb6a ILT |
4319 | else if (sym.st_shndx == SHN_COMMON) |
4320 | { | |
badd23e3 | 4321 | sec = bfd_com_section_ptr; |
6ec3bb6a ILT |
4322 | /* What ELF calls the size we call the value. What ELF |
4323 | calls the value we call the alignment. */ | |
4324 | value = sym.st_size; | |
4325 | } | |
4326 | else | |
4327 | { | |
4328 | /* Leave it up to the processor backend. */ | |
4329 | } | |
4330 | ||
4331 | name = elf_string_from_elf_section (abfd, hdr->sh_link, sym.st_name); | |
4332 | if (name == (const char *) NULL) | |
4333 | goto error_return; | |
4334 | ||
4335 | if (add_symbol_hook) | |
4336 | { | |
4337 | if (! (*add_symbol_hook) (abfd, info, &sym, &name, &flags, &sec, | |
4338 | &value)) | |
4339 | goto error_return; | |
4340 | ||
4341 | /* The hook function sets the name to NULL if this symbol | |
4342 | should be skipped for some reason. */ | |
4343 | if (name == (const char *) NULL) | |
4344 | continue; | |
4345 | } | |
4346 | ||
4347 | /* Sanity check that all possibilities were handled. */ | |
4348 | if (flags == BSF_NO_FLAGS || sec == (asection *) NULL) | |
4349 | { | |
4350 | bfd_set_error (bfd_error_bad_value); | |
4351 | goto error_return; | |
4352 | } | |
4353 | ||
badd23e3 | 4354 | if (bfd_is_und_section (sec) |
013dec1a ILT |
4355 | || bfd_is_com_section (sec)) |
4356 | definition = false; | |
4357 | else | |
4358 | definition = true; | |
4359 | ||
4360 | if (info->hash->creator->flavour == bfd_target_elf_flavour) | |
4361 | { | |
4362 | /* We need to look up the symbol now in order to get some of | |
4363 | the dynamic object handling right. We pass the hash | |
4364 | table entry in to _bfd_generic_link_add_one_symbol so | |
4365 | that it does not have to look it up again. */ | |
4366 | h = elf_link_hash_lookup (elf_hash_table (info), name, | |
4367 | true, false, false); | |
4368 | if (h == NULL) | |
4369 | goto error_return; | |
4370 | *sym_hash = h; | |
4371 | ||
4372 | /* If we are looking at a dynamic object, and this is a | |
4373 | definition, we need to see if it has already been defined | |
4374 | by some other object. If it has, we want to use the | |
4375 | existing definition, and we do not want to report a | |
4376 | multiple symbol definition error; we do this by | |
badd23e3 | 4377 | clobbering sec to be bfd_und_section_ptr. */ |
013dec1a ILT |
4378 | if (dynamic && definition) |
4379 | { | |
4380 | if (h->root.type == bfd_link_hash_defined) | |
badd23e3 | 4381 | sec = bfd_und_section_ptr; |
013dec1a ILT |
4382 | } |
4383 | ||
4384 | /* Similarly, if we are not looking at a dynamic object, and | |
4385 | we have a definition, we want to override any definition | |
4386 | we may have from a dynamic object. Symbols from regular | |
4387 | files always take precedence over symbols from dynamic | |
4388 | objects, even if they are defined after the dynamic | |
4389 | object in the link. */ | |
4390 | if (! dynamic | |
4391 | && definition | |
4392 | && h->root.type == bfd_link_hash_defined | |
4393 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
4394 | && (bfd_get_flavour (h->root.u.def.section->owner) | |
4395 | == bfd_target_elf_flavour) | |
4396 | && (elf_elfheader (h->root.u.def.section->owner)->e_type | |
4397 | == ET_DYN)) | |
4398 | { | |
4399 | /* Change the hash table entry to undefined, and let | |
4400 | _bfd_generic_link_add_one_symbol do the right thing | |
4401 | with the new definition. */ | |
4402 | h->root.type = bfd_link_hash_undefined; | |
4403 | h->root.u.undef.abfd = h->root.u.def.section->owner; | |
4404 | } | |
4405 | } | |
4406 | ||
4407 | if (! (_bfd_generic_link_add_one_symbol | |
4408 | (info, abfd, name, flags, sec, value, (const char *) NULL, | |
4409 | false, collect, (struct bfd_link_hash_entry **) sym_hash))) | |
6ec3bb6a ILT |
4410 | goto error_return; |
4411 | ||
013dec1a ILT |
4412 | if (dynamic |
4413 | && definition | |
4414 | && (flags & BSF_WEAK) != 0 | |
4415 | && ELF_ST_TYPE (sym.st_info) != STT_FUNC | |
4416 | && (*sym_hash)->weakdef == NULL) | |
4417 | { | |
4418 | /* Keep a list of all weak defined non function symbols from | |
4419 | a dynamic object, using the weakdef field. Later in this | |
4420 | function we will set the weakdef field to the correct | |
4421 | value. We only put non-function symbols from dynamic | |
4422 | objects on this list, because that happens to be the only | |
4423 | time we need to know the normal symbol corresponding to a | |
4424 | weak symbol, and the information is time consuming to | |
4425 | figure out. If the weakdef field is not already NULL, | |
4426 | then this symbol was already defined by some previous | |
4427 | dynamic object, and we will be using that previous | |
4428 | definition anyhow. */ | |
4429 | ||
4430 | (*sym_hash)->weakdef = weaks; | |
4431 | weaks = *sym_hash; | |
4432 | } | |
4433 | ||
6ec3bb6a ILT |
4434 | if (info->hash->creator->flavour == bfd_target_elf_flavour) |
4435 | { | |
013dec1a ILT |
4436 | int old_flags; |
4437 | boolean dynsym; | |
4438 | int new_flag; | |
4439 | ||
6ec3bb6a ILT |
4440 | /* Remember the symbol size, type and alignment. */ |
4441 | if (sym.st_size != 0) | |
4442 | { | |
4443 | /* FIXME: We should probably somehow give a warning if | |
4444 | the symbol size changes. */ | |
013dec1a | 4445 | h->size = sym.st_size; |
6ec3bb6a ILT |
4446 | } |
4447 | if (sym.st_shndx == SHN_COMMON | |
013dec1a ILT |
4448 | && sym.st_value > h->align) |
4449 | h->align = sym.st_value; | |
6ec3bb6a ILT |
4450 | if (ELF_ST_TYPE (sym.st_info) != STT_NOTYPE) |
4451 | { | |
4452 | /* FIXME: We should probably somehow give a warning if | |
4453 | the symbol type changes. */ | |
013dec1a ILT |
4454 | h->type = ELF_ST_TYPE (sym.st_info); |
4455 | } | |
4456 | ||
4457 | /* Set a flag in the hash table entry indicating the type of | |
4458 | reference or definition we just found. Keep a count of | |
4459 | the number of dynamic symbols we find. A dynamic symbol | |
4460 | is one which is referenced or defined by both a regular | |
4461 | object and a shared object, or one which is referenced or | |
4462 | defined by more than one shared object. */ | |
4463 | old_flags = h->elf_link_hash_flags; | |
4464 | dynsym = false; | |
4465 | if (! dynamic) | |
4466 | { | |
4467 | if (! definition) | |
4468 | new_flag = ELF_LINK_HASH_REF_REGULAR; | |
4469 | else | |
4470 | new_flag = ELF_LINK_HASH_DEF_REGULAR; | |
4471 | if ((old_flags & (ELF_LINK_HASH_DEF_DYNAMIC | |
4472 | | ELF_LINK_HASH_REF_DYNAMIC)) != 0) | |
4473 | dynsym = true; | |
4474 | } | |
4475 | else | |
4476 | { | |
4477 | if (! definition) | |
4478 | new_flag = ELF_LINK_HASH_REF_DYNAMIC; | |
4479 | else | |
4480 | new_flag = ELF_LINK_HASH_DEF_DYNAMIC; | |
4481 | if ((old_flags & new_flag) != 0) | |
4482 | { | |
4483 | if (! definition) | |
4484 | new_flag = ELF_LINK_HASH_REF_DYNAMIC_MULTIPLE; | |
4485 | else | |
4486 | new_flag = ELF_LINK_HASH_DEF_DYNAMIC_MULTIPLE; | |
4487 | dynsym = true; | |
4488 | } | |
4489 | else | |
4490 | { | |
4491 | if ((old_flags & (ELF_LINK_HASH_DEF_REGULAR | |
4492 | | ELF_LINK_HASH_REF_REGULAR)) != 0) | |
4493 | dynsym = true; | |
4494 | } | |
4495 | } | |
4496 | ||
4497 | h->elf_link_hash_flags |= new_flag; | |
4498 | if (dynsym && h->dynindx == -1) | |
4499 | { | |
4500 | if (! elf_link_record_dynamic_symbol (info, h)) | |
4501 | goto error_return; | |
4502 | } | |
4503 | } | |
4504 | } | |
4505 | ||
4506 | /* Now set the weakdefs field correctly for all the weak defined | |
4507 | symbols we found. The only way to do this is to search all the | |
4508 | symbols. Since we only need the information for non functions in | |
4509 | dynamic objects, that's the only time we actually put anything on | |
4510 | the list WEAKS. We need this information so that if a regular | |
4511 | object refers to a symbol defined weakly in a dynamic object, the | |
4512 | real symbol in the dynamic object is also put in the dynamic | |
4513 | symbols; we also must arrange for both symbols to point to the | |
4514 | same memory location. We could handle the general case of symbol | |
4515 | aliasing, but a general symbol alias can only be generated in | |
4516 | assembler code, handling it correctly would be very time | |
4517 | consuming, and other ELF linkers don't handle general aliasing | |
4518 | either. */ | |
4519 | while (weaks != NULL) | |
4520 | { | |
4521 | struct elf_link_hash_entry *hlook; | |
4522 | asection *slook; | |
4523 | bfd_vma vlook; | |
4524 | struct elf_link_hash_entry **hpp; | |
4525 | struct elf_link_hash_entry **hppend; | |
4526 | ||
4527 | hlook = weaks; | |
4528 | weaks = hlook->weakdef; | |
4529 | hlook->weakdef = NULL; | |
4530 | ||
4531 | BFD_ASSERT (hlook->root.type == bfd_link_hash_defined); | |
4532 | slook = hlook->root.u.def.section; | |
4533 | vlook = hlook->root.u.def.value; | |
4534 | ||
4535 | hpp = elf_sym_hashes (abfd); | |
4536 | hppend = hpp + extsymcount; | |
4537 | for (; hpp < hppend; hpp++) | |
4538 | { | |
4539 | struct elf_link_hash_entry *h; | |
4540 | ||
4541 | h = *hpp; | |
4542 | if (h != hlook | |
4543 | && h->root.type == bfd_link_hash_defined | |
4544 | && h->root.u.def.section == slook | |
4545 | && h->root.u.def.value == vlook) | |
4546 | { | |
4547 | hlook->weakdef = h; | |
4548 | ||
4549 | /* If the weak definition is in the list of dynamic | |
4550 | symbols, make sure the real definition is put there | |
4551 | as well. */ | |
4552 | if (hlook->dynindx != -1 | |
4553 | && h->dynindx == -1) | |
4554 | { | |
4555 | if (! elf_link_record_dynamic_symbol (info, h)) | |
4556 | goto error_return; | |
4557 | } | |
4558 | ||
4559 | break; | |
6ec3bb6a ILT |
4560 | } |
4561 | } | |
4562 | } | |
4563 | ||
4564 | if (buf != NULL) | |
4565 | free (buf); | |
4566 | ||
4567 | return true; | |
4568 | ||
4569 | error_return: | |
4570 | if (buf != NULL) | |
4571 | free (buf); | |
013dec1a ILT |
4572 | if (dynbuf != NULL) |
4573 | free (dynbuf); | |
6ec3bb6a ILT |
4574 | return false; |
4575 | } | |
013dec1a ILT |
4576 | |
4577 | /* Create some sections which will be filled in with dynamic linking | |
4578 | information. The ABFD argument is an input file which is a dynamic | |
4579 | object. The dynamic sections take up virtual memory space when the | |
4580 | final executable is run, so we need to create them before addresses | |
4581 | are assigned to the output sections. We work out the actual | |
4582 | contents and size of these sections later. */ | |
4583 | ||
4584 | static boolean | |
4585 | elf_link_create_dynamic_sections (abfd, info) | |
4586 | bfd *abfd; | |
4587 | struct bfd_link_info *info; | |
4588 | { | |
4589 | flagword flags; | |
4590 | register asection *s; | |
4591 | struct elf_link_hash_entry *h; | |
4592 | struct elf_backend_data *bed; | |
4593 | ||
4594 | /* Note that we set the SEC_IN_MEMORY flag for all of these | |
4595 | sections. */ | |
4596 | flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY; | |
4597 | ||
8af74670 ILT |
4598 | /* A dynamically linked executable has a .interp section, but a |
4599 | shared library does not. */ | |
4600 | if (! info->shared) | |
4601 | { | |
4602 | s = bfd_make_section (abfd, ".interp"); | |
4603 | if (s == NULL | |
4604 | || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)) | |
4605 | return false; | |
4606 | } | |
013dec1a ILT |
4607 | |
4608 | s = bfd_make_section (abfd, ".dynamic"); | |
4609 | if (s == NULL | |
4610 | || ! bfd_set_section_flags (abfd, s, flags) | |
4611 | || ! bfd_set_section_alignment (abfd, s, LOG_FILE_ALIGN)) | |
4612 | return false; | |
4613 | ||
4614 | /* The special symbol _DYNAMIC is always set to the start of the | |
4615 | .dynamic section. This call occurs before we have processed the | |
4616 | symbols for any dynamic object, so we don't have to worry about | |
4617 | overriding a dynamic definition. We could set _DYNAMIC in a | |
4618 | linker script, but we only want to define it if we are, in fact, | |
4619 | creating a .dynamic section. We don't want to define it if there | |
4620 | is no .dynamic section, since on some ELF platforms the start up | |
4621 | code examines it to decide how to initialize the process. */ | |
4622 | h = NULL; | |
4623 | if (! (_bfd_generic_link_add_one_symbol | |
4624 | (info, abfd, "_DYNAMIC", BSF_GLOBAL, s, (bfd_vma) 0, | |
4625 | (const char *) NULL, false, get_elf_backend_data (abfd)->collect, | |
4626 | (struct bfd_link_hash_entry **) &h))) | |
4627 | return false; | |
4628 | h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR; | |
4629 | ||
4630 | s = bfd_make_section (abfd, ".dynsym"); | |
4631 | if (s == NULL | |
4632 | || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY) | |
4633 | || ! bfd_set_section_alignment (abfd, s, LOG_FILE_ALIGN)) | |
4634 | return false; | |
4635 | ||
4636 | /* The first .dynsym symbol is a dummy. */ | |
4637 | elf_hash_table (info)->dynsymcount = 1; | |
4638 | ||
4639 | s = bfd_make_section (abfd, ".dynstr"); | |
4640 | if (s == NULL | |
4641 | || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)) | |
4642 | return false; | |
4643 | ||
4644 | /* Create a strtab to hold the dynamic symbol names. */ | |
4645 | elf_hash_table (info)->dynstr = bfd_new_strtab (abfd); | |
4646 | if (elf_hash_table (info)->dynstr == NULL) | |
4647 | return false; | |
4648 | ||
4649 | s = bfd_make_section (abfd, ".hash"); | |
4650 | if (s == NULL | |
4651 | || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY) | |
4652 | || ! bfd_set_section_alignment (abfd, s, LOG_FILE_ALIGN)) | |
4653 | return false; | |
4654 | ||
4655 | /* Let the backend create the rest of the sections. This lets the | |
4656 | backend set the right flags. The backend will normally create | |
4657 | the .got and .plt sections. */ | |
4658 | bed = get_elf_backend_data (abfd); | |
4659 | return (*bed->elf_backend_create_dynamic_sections) (abfd, info); | |
4660 | } | |
4661 | ||
4662 | /* Add an entry to the .dynamic table. */ | |
4663 | ||
4664 | boolean | |
4665 | elf_add_dynamic_entry (info, tag, val) | |
4666 | struct bfd_link_info *info; | |
4667 | bfd_vma tag; | |
4668 | bfd_vma val; | |
4669 | { | |
4670 | Elf_Internal_Dyn dyn; | |
4671 | bfd *dynobj; | |
4672 | asection *s; | |
4673 | size_t newsize; | |
4674 | bfd_byte *newcontents; | |
4675 | ||
4676 | dynobj = elf_hash_table (info)->dynobj; | |
4677 | ||
4678 | s = bfd_get_section_by_name (dynobj, ".dynamic"); | |
4679 | BFD_ASSERT (s != NULL); | |
4680 | ||
4681 | newsize = s->_raw_size + sizeof (Elf_External_Dyn); | |
4682 | if (s->contents == NULL) | |
4683 | newcontents = (bfd_byte *) malloc (newsize); | |
4684 | else | |
4685 | newcontents = (bfd_byte *) realloc (s->contents, newsize); | |
4686 | if (newcontents == NULL) | |
4687 | { | |
4688 | bfd_set_error (bfd_error_no_memory); | |
4689 | return false; | |
4690 | } | |
4691 | ||
4692 | dyn.d_tag = tag; | |
4693 | dyn.d_un.d_val = val; | |
4694 | elf_swap_dyn_out (dynobj, &dyn, | |
4695 | (Elf_External_Dyn *) (newcontents + s->_raw_size)); | |
4696 | ||
4697 | s->_raw_size = newsize; | |
4698 | s->contents = newcontents; | |
4699 | ||
4700 | return true; | |
4701 | } | |
4702 | ||
4703 | /* Record an assignment to a symbol made by a linker script. We need | |
4704 | this in case some dynamic object refers to this symbol. */ | |
4705 | ||
4706 | /*ARGSUSED*/ | |
4707 | boolean | |
4708 | NAME(bfd_elf,record_link_assignment) (output_bfd, info, name) | |
4709 | bfd *output_bfd; | |
4710 | struct bfd_link_info *info; | |
4711 | const char *name; | |
4712 | { | |
4713 | struct elf_link_hash_entry *h; | |
4714 | ||
4715 | /* This is called after we have examined all the input objects. If | |
4716 | the symbol does not exist, it merely means that no object refers | |
4717 | to it, and we can just ignore it at this point. */ | |
4718 | h = elf_link_hash_lookup (elf_hash_table (info), name, | |
4719 | false, false, false); | |
4720 | if (h == NULL) | |
4721 | return true; | |
4722 | ||
4723 | h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR; | |
4724 | ||
4725 | if ((h->elf_link_hash_flags & (ELF_LINK_HASH_DEF_DYNAMIC | |
4726 | | ELF_LINK_HASH_REF_DYNAMIC)) != 0 | |
4727 | && h->dynindx == -1) | |
4728 | { | |
4729 | if (! elf_link_record_dynamic_symbol (info, h)) | |
4730 | return false; | |
4731 | ||
4732 | /* If this is a weak defined symbol, and we know a corresponding | |
4733 | real symbol from the same dynamic object, make sure the real | |
4734 | symbol is also made into a dynamic symbol. */ | |
4735 | if (h->weakdef != NULL | |
4736 | && h->weakdef->dynindx == -1) | |
4737 | { | |
4738 | if (! elf_link_record_dynamic_symbol (info, h->weakdef)) | |
4739 | return false; | |
4740 | } | |
4741 | } | |
4742 | ||
4743 | return true; | |
4744 | } | |
4745 | ||
4746 | /* Array used to determine the number of hash table buckets to use | |
4747 | based on the number of symbols there are. If there are fewer than | |
4748 | 3 symbols we use 1 bucket, fewer than 17 symbols we use 3 buckets, | |
4749 | fewer than 37 we use 17 buckets, and so forth. We never use more | |
4750 | than 521 buckets. */ | |
4751 | ||
4752 | static const size_t elf_buckets[] = | |
4753 | { | |
4754 | 1, 3, 17, 37, 67, 97, 131, 197, 263, 521, 0 | |
4755 | }; | |
4756 | ||
4757 | /* Set up the sizes and contents of the ELF dynamic sections. This is | |
4758 | called by the ELF linker emulation before_allocation routine. We | |
4759 | must set the sizes of the sections before the linker sets the | |
4760 | addresses of the various sections. */ | |
4761 | ||
4762 | boolean | |
7c726b66 | 4763 | NAME(bfd_elf,size_dynamic_sections) (output_bfd, info, sinterpptr) |
013dec1a ILT |
4764 | bfd *output_bfd; |
4765 | struct bfd_link_info *info; | |
7c726b66 | 4766 | asection **sinterpptr; |
013dec1a ILT |
4767 | { |
4768 | bfd *dynobj; | |
4769 | size_t dynsymcount; | |
4770 | asection *s; | |
4771 | Elf_Internal_Sym isym; | |
4772 | size_t i; | |
4773 | size_t bucketcount; | |
4774 | struct elf_backend_data *bed; | |
4775 | ||
7c726b66 ILT |
4776 | *sinterpptr = NULL; |
4777 | ||
013dec1a ILT |
4778 | dynobj = elf_hash_table (info)->dynobj; |
4779 | dynsymcount = elf_hash_table (info)->dynsymcount; | |
4780 | ||
4781 | /* If there were no dynamic objects in the link, there is nothing to | |
4782 | do here. */ | |
4783 | if (dynobj == NULL) | |
4784 | return true; | |
4785 | ||
7c726b66 | 4786 | *sinterpptr = bfd_get_section_by_name (dynobj, ".interp"); |
8af74670 | 4787 | BFD_ASSERT (*sinterpptr != NULL || info->shared); |
7c726b66 | 4788 | |
013dec1a ILT |
4789 | /* Set the size of the .dynsym and .hash sections. We counted the |
4790 | number of dynamic symbols in elf_link_add_object_symbols. We | |
4791 | will build the contents of .dynsym and .hash when we build the | |
4792 | final symbol table, because until then we do not know the correct | |
4793 | value to give the symbols. We built the .dynstr section as we | |
4794 | went along in elf_link_add_object_symbols. */ | |
4795 | s = bfd_get_section_by_name (dynobj, ".dynsym"); | |
4796 | BFD_ASSERT (s != NULL); | |
4797 | s->_raw_size = dynsymcount * sizeof (Elf_External_Sym); | |
4798 | s->contents = (bfd_byte *) bfd_alloc (output_bfd, s->_raw_size); | |
4799 | if (s->contents == NULL && s->_raw_size != 0) | |
4800 | { | |
4801 | bfd_set_error (bfd_error_no_memory); | |
4802 | return false; | |
4803 | } | |
4804 | ||
4805 | /* The first entry in .dynsym is a dummy symbol. */ | |
4806 | isym.st_value = 0; | |
4807 | isym.st_size = 0; | |
4808 | isym.st_name = 0; | |
4809 | isym.st_info = 0; | |
4810 | isym.st_other = 0; | |
4811 | isym.st_shndx = 0; | |
4812 | elf_swap_symbol_out (output_bfd, &isym, | |
4813 | (Elf_External_Sym *) s->contents); | |
4814 | ||
4815 | for (i = 0; elf_buckets[i] != 0; i++) | |
4816 | { | |
4817 | bucketcount = elf_buckets[i]; | |
4818 | if (dynsymcount < elf_buckets[i + 1]) | |
4819 | break; | |
4820 | } | |
4821 | ||
4822 | s = bfd_get_section_by_name (dynobj, ".hash"); | |
4823 | BFD_ASSERT (s != NULL); | |
4824 | s->_raw_size = (2 + bucketcount + dynsymcount) * (ARCH_SIZE / 8); | |
4825 | s->contents = (bfd_byte *) bfd_alloc (output_bfd, s->_raw_size); | |
4826 | if (s->contents == NULL) | |
4827 | { | |
4828 | bfd_set_error (bfd_error_no_memory); | |
4829 | return false; | |
4830 | } | |
4831 | memset (s->contents, 0, s->_raw_size); | |
4832 | ||
4833 | put_word (output_bfd, bucketcount, s->contents); | |
4834 | put_word (output_bfd, dynsymcount, s->contents + (ARCH_SIZE / 8)); | |
4835 | ||
4836 | elf_hash_table (info)->bucketcount = bucketcount; | |
4837 | ||
4838 | s = bfd_get_section_by_name (dynobj, ".dynstr"); | |
4839 | BFD_ASSERT (s != NULL); | |
4840 | s->_raw_size = elf_hash_table (info)->dynstr->length; | |
4841 | s->contents = (unsigned char *) elf_hash_table (info)->dynstr->tab; | |
4842 | ||
4843 | /* Find all symbols which were defined in a dynamic object and make | |
4844 | the backend pick a reasonable value for them. */ | |
4845 | elf_link_hash_traverse (elf_hash_table (info), | |
4846 | elf_adjust_dynamic_symbol, | |
4847 | (PTR) info); | |
4848 | ||
4849 | /* Add some entries to the .dynamic section. We fill in some of the | |
4850 | values later, in elf_bfd_final_link, but we must add the entries | |
4851 | now so that we know the final size of the .dynamic section. */ | |
4852 | if (bfd_get_section_by_name (output_bfd, ".init") != NULL) | |
4853 | { | |
4854 | if (! elf_add_dynamic_entry (info, DT_INIT, 0)) | |
4855 | return false; | |
4856 | } | |
4857 | if (bfd_get_section_by_name (output_bfd, ".fini") != NULL) | |
4858 | { | |
4859 | if (! elf_add_dynamic_entry (info, DT_FINI, 0)) | |
4860 | return false; | |
4861 | } | |
4862 | if (! elf_add_dynamic_entry (info, DT_HASH, 0) | |
4863 | || ! elf_add_dynamic_entry (info, DT_STRTAB, 0) | |
4864 | || ! elf_add_dynamic_entry (info, DT_SYMTAB, 0) | |
4865 | || ! elf_add_dynamic_entry (info, DT_STRSZ, | |
4866 | elf_hash_table (info)->dynstr->length) | |
4867 | || ! elf_add_dynamic_entry (info, DT_SYMENT, | |
4868 | sizeof (Elf_External_Sym))) | |
4869 | return false; | |
4870 | ||
4871 | /* The backend must work out the sizes of all the other dynamic | |
4872 | sections. */ | |
4873 | bed = get_elf_backend_data (output_bfd); | |
4874 | if (! (*bed->elf_backend_size_dynamic_sections) (output_bfd, info)) | |
4875 | return false; | |
4876 | ||
4877 | return elf_add_dynamic_entry (info, DT_NULL, 0); | |
4878 | } | |
4879 | ||
4880 | /* Make the backend pick a good value for a dynamic symbol. This is | |
4881 | called via elf_link_hash_traverse, and also calls itself | |
4882 | recursively. */ | |
4883 | ||
4884 | static boolean | |
4885 | elf_adjust_dynamic_symbol (h, data) | |
4886 | struct elf_link_hash_entry *h; | |
4887 | PTR data; | |
4888 | { | |
4889 | struct bfd_link_info *info = (struct bfd_link_info *) data; | |
4890 | bfd *dynobj; | |
4891 | struct elf_backend_data *bed; | |
4892 | ||
4893 | /* If this symbol is not defined by a dynamic object, or is not | |
4894 | referenced by a regular object, ignore it. FIXME: Do we need to | |
4895 | worry about symbols which are defined by one dynamic object and | |
4896 | referenced by another one? */ | |
4897 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0 | |
4898 | || (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0 | |
4899 | || (h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) == 0) | |
4900 | return true; | |
4901 | ||
4902 | /* If we've already adjusted this symbol, don't do it again. This | |
4903 | can happen via a recursive call. */ | |
4904 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DYNAMIC_ADJUSTED) != 0) | |
4905 | return true; | |
4906 | ||
4907 | /* Don't look at this symbol again. Note that we must set this | |
4908 | after checking the above conditions, because we may look at a | |
4909 | symbol once, decide not to do anything, and then get called | |
4910 | recursively later after REF_REGULAR is set below. */ | |
4911 | h->elf_link_hash_flags |= ELF_LINK_HASH_DYNAMIC_ADJUSTED; | |
4912 | ||
4913 | /* If this is a weak definition, and we know a real definition, and | |
4914 | the real symbol is not itself defined by a regular object file, | |
4915 | then get a good value for the real definition. We handle the | |
4916 | real symbol first, for the convenience of the backend routine. | |
4917 | ||
4918 | Note that there is a confusing case here. If the real definition | |
4919 | is defined by a regular object file, we don't get the real symbol | |
4920 | from the dynamic object, but we do get the weak symbol. If the | |
4921 | processor backend uses a COPY reloc, then if some routine in the | |
4922 | dynamic object changes the real symbol, we will not see that | |
4923 | change in the corresponding weak symbol. This is the way other | |
4924 | ELF linkers work as well, and seems to be a result of the shared | |
4925 | library model. | |
4926 | ||
4927 | I will clarify this issue. Most SVR4 shared libraries define the | |
4928 | variable _timezone and define timezone as a weak synonym. The | |
4929 | tzset call changes _timezone. If you write | |
4930 | extern int timezone; | |
4931 | int _timezone = 5; | |
4932 | int main () { tzset (); printf ("%d %d\n", timezone, _timezone); } | |
4933 | you might expect that, since timezone is a synonym for _timezone, | |
4934 | the same number will print both times. However, if the processor | |
4935 | backend uses a COPY reloc, then actually timezone will be copied | |
4936 | into your process image, and, since you define _timezone | |
4937 | yourself, _timezone will not. Thus timezone and _timezone will | |
4938 | wind up at different memory locations. The tzset call will set | |
4939 | _timezone, leaving timezone unchanged. */ | |
4940 | ||
4941 | if (h->weakdef != NULL) | |
4942 | { | |
4943 | struct elf_link_hash_entry *weakdef; | |
4944 | ||
4945 | BFD_ASSERT (h->root.type == bfd_link_hash_defined); | |
4946 | weakdef = h->weakdef; | |
4947 | BFD_ASSERT (weakdef->root.type == bfd_link_hash_defined); | |
4948 | BFD_ASSERT (weakdef->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC); | |
4949 | if ((weakdef->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0 | |
4950 | || (weakdef->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) == 0) | |
4951 | { | |
4952 | /* This symbol is defined or referenced by a regular object | |
4953 | file, so we will not do anything special. Clear weakdef | |
4954 | for the convenience of the processor backend. */ | |
4955 | h->weakdef = NULL; | |
4956 | } | |
4957 | else | |
4958 | { | |
4959 | /* There is an implicit reference by a regular object file | |
4960 | via the weak symbol. */ | |
4961 | weakdef->elf_link_hash_flags |= ELF_LINK_HASH_REF_REGULAR; | |
4962 | if (! elf_adjust_dynamic_symbol (weakdef, (PTR) info)) | |
4963 | return false; | |
4964 | } | |
4965 | } | |
4966 | ||
4967 | dynobj = elf_hash_table (info)->dynobj; | |
4968 | bed = get_elf_backend_data (dynobj); | |
4969 | if (! (*bed->elf_backend_adjust_dynamic_symbol) (info, h)) | |
4970 | { | |
4971 | /* FIXME: No way to return error. */ | |
4972 | abort (); | |
4973 | } | |
4974 | ||
4975 | return true; | |
4976 | } | |
6ec3bb6a ILT |
4977 | \f |
4978 | /* Final phase of ELF linker. */ | |
4979 | ||
4980 | /* A structure we use to avoid passing large numbers of arguments. */ | |
4981 | ||
4982 | struct elf_final_link_info | |
4983 | { | |
4984 | /* General link information. */ | |
4985 | struct bfd_link_info *info; | |
4986 | /* Output BFD. */ | |
4987 | bfd *output_bfd; | |
4988 | /* Symbol string table. */ | |
4989 | struct strtab *symstrtab; | |
013dec1a ILT |
4990 | /* .dynsym section. */ |
4991 | asection *dynsym_sec; | |
4992 | /* .hash section. */ | |
4993 | asection *hash_sec; | |
6ec3bb6a ILT |
4994 | /* Buffer large enough to hold contents of any section. */ |
4995 | bfd_byte *contents; | |
4996 | /* Buffer large enough to hold external relocs of any section. */ | |
4997 | PTR external_relocs; | |
4998 | /* Buffer large enough to hold internal relocs of any section. */ | |
4999 | Elf_Internal_Rela *internal_relocs; | |
5000 | /* Buffer large enough to hold external local symbols of any input | |
5001 | BFD. */ | |
5002 | Elf_External_Sym *external_syms; | |
5003 | /* Buffer large enough to hold internal local symbols of any input | |
5004 | BFD. */ | |
5005 | Elf_Internal_Sym *internal_syms; | |
5006 | /* Array large enough to hold a symbol index for each local symbol | |
5007 | of any input BFD. */ | |
5008 | long *indices; | |
5009 | /* Array large enough to hold a section pointer for each local | |
5010 | symbol of any input BFD. */ | |
5011 | asection **sections; | |
5012 | /* Buffer to hold swapped out symbols. */ | |
5013 | Elf_External_Sym *symbuf; | |
5014 | /* Number of swapped out symbols in buffer. */ | |
5015 | size_t symbuf_count; | |
5016 | /* Number of symbols which fit in symbuf. */ | |
5017 | size_t symbuf_size; | |
5018 | }; | |
5019 | ||
5020 | static boolean elf_link_output_sym | |
71edd06d ILT |
5021 | PARAMS ((struct elf_final_link_info *, const char *, |
5022 | Elf_Internal_Sym *, asection *)); | |
6ec3bb6a ILT |
5023 | static boolean elf_link_flush_output_syms |
5024 | PARAMS ((struct elf_final_link_info *)); | |
5025 | static boolean elf_link_output_extsym | |
5026 | PARAMS ((struct elf_link_hash_entry *, PTR)); | |
5027 | static boolean elf_link_input_bfd | |
5028 | PARAMS ((struct elf_final_link_info *, bfd *)); | |
5029 | static boolean elf_reloc_link_order | |
5030 | PARAMS ((bfd *, struct bfd_link_info *, asection *, | |
5031 | struct bfd_link_order *)); | |
5032 | ||
5033 | /* Do the final step of an ELF link. */ | |
5034 | ||
5035 | boolean | |
5036 | elf_bfd_final_link (abfd, info) | |
5037 | bfd *abfd; | |
5038 | struct bfd_link_info *info; | |
5039 | { | |
013dec1a | 5040 | bfd *dynobj; |
6ec3bb6a ILT |
5041 | struct elf_final_link_info finfo; |
5042 | register asection *o; | |
5043 | register struct bfd_link_order *p; | |
5044 | register bfd *sub; | |
5045 | size_t max_contents_size; | |
5046 | size_t max_external_reloc_size; | |
5047 | size_t max_internal_reloc_count; | |
5048 | size_t max_sym_count; | |
5049 | file_ptr off; | |
5050 | Elf_Internal_Sym elfsym; | |
013dec1a | 5051 | unsigned int i; |
6ec3bb6a ILT |
5052 | Elf_Internal_Shdr *symtab_hdr; |
5053 | Elf_Internal_Shdr *symstrtab_hdr; | |
71edd06d | 5054 | struct elf_backend_data *bed = get_elf_backend_data (abfd); |
6ec3bb6a | 5055 | |
0ff5d3a6 ILT |
5056 | if (info->shared) |
5057 | { | |
5058 | fprintf (stderr, | |
5059 | "Generating ELF shared libraries is not yet supported\n"); | |
5060 | bfd_set_error (bfd_error_invalid_operation); | |
5061 | return false; | |
5062 | } | |
5063 | ||
013dec1a ILT |
5064 | dynobj = elf_hash_table (info)->dynobj; |
5065 | ||
6ec3bb6a ILT |
5066 | finfo.info = info; |
5067 | finfo.output_bfd = abfd; | |
5068 | finfo.symstrtab = bfd_new_strtab (abfd); | |
5069 | if (finfo.symstrtab == NULL) | |
5070 | return false; | |
013dec1a ILT |
5071 | if (dynobj == NULL) |
5072 | { | |
5073 | finfo.dynsym_sec = NULL; | |
5074 | finfo.hash_sec = NULL; | |
5075 | } | |
5076 | else | |
5077 | { | |
5078 | finfo.dynsym_sec = bfd_get_section_by_name (dynobj, ".dynsym"); | |
5079 | finfo.hash_sec = bfd_get_section_by_name (dynobj, ".hash"); | |
5080 | if (finfo.dynsym_sec == NULL | |
5081 | || finfo.hash_sec == NULL) | |
5082 | abort (); | |
5083 | } | |
6ec3bb6a ILT |
5084 | finfo.contents = NULL; |
5085 | finfo.external_relocs = NULL; | |
5086 | finfo.internal_relocs = NULL; | |
5087 | finfo.external_syms = NULL; | |
5088 | finfo.internal_syms = NULL; | |
5089 | finfo.indices = NULL; | |
5090 | finfo.sections = NULL; | |
5091 | finfo.symbuf = NULL; | |
5092 | finfo.symbuf_count = 0; | |
5093 | ||
5094 | /* Count up the number of relocations we will output for each output | |
5095 | section, so that we know the sizes of the reloc sections. We | |
5096 | also figure out some maximum sizes. */ | |
5097 | max_contents_size = 0; | |
5098 | max_external_reloc_size = 0; | |
5099 | max_internal_reloc_count = 0; | |
5100 | max_sym_count = 0; | |
5101 | for (o = abfd->sections; o != (asection *) NULL; o = o->next) | |
5102 | { | |
5103 | o->reloc_count = 0; | |
5104 | ||
5105 | for (p = o->link_order_head; p != NULL; p = p->next) | |
5106 | { | |
5107 | if (p->type == bfd_section_reloc_link_order | |
5108 | || p->type == bfd_symbol_reloc_link_order) | |
5109 | ++o->reloc_count; | |
5110 | else if (p->type == bfd_indirect_link_order) | |
5111 | { | |
5112 | asection *sec; | |
5113 | ||
5114 | sec = p->u.indirect.section; | |
5115 | ||
5116 | if (info->relocateable) | |
5117 | o->reloc_count += sec->reloc_count; | |
5118 | ||
5119 | if (sec->_raw_size > max_contents_size) | |
5120 | max_contents_size = sec->_raw_size; | |
5121 | if (sec->_cooked_size > max_contents_size) | |
5122 | max_contents_size = sec->_cooked_size; | |
5123 | ||
5124 | /* We are interested in just local symbols, not all | |
5125 | symbols. */ | |
5315c428 ILT |
5126 | if (bfd_get_flavour (sec->owner) == bfd_target_elf_flavour) |
5127 | { | |
5128 | size_t sym_count; | |
5129 | ||
5130 | if (elf_bad_symtab (sec->owner)) | |
5131 | sym_count = (elf_tdata (sec->owner)->symtab_hdr.sh_size | |
5132 | / sizeof (Elf_External_Sym)); | |
5133 | else | |
5134 | sym_count = elf_tdata (sec->owner)->symtab_hdr.sh_info; | |
5135 | ||
5136 | if (sym_count > max_sym_count) | |
5137 | max_sym_count = sym_count; | |
6ec3bb6a | 5138 | |
6c8fa8e6 ILT |
5139 | if ((sec->flags & SEC_RELOC) != 0) |
5140 | { | |
5141 | size_t ext_size; | |
6ec3bb6a | 5142 | |
6c8fa8e6 ILT |
5143 | ext_size = elf_section_data (sec)->rel_hdr.sh_size; |
5144 | if (ext_size > max_external_reloc_size) | |
5145 | max_external_reloc_size = ext_size; | |
5146 | if (sec->reloc_count > max_internal_reloc_count) | |
5147 | max_internal_reloc_count = sec->reloc_count; | |
5148 | } | |
6ec3bb6a ILT |
5149 | } |
5150 | } | |
5151 | } | |
5152 | ||
5153 | if (o->reloc_count > 0) | |
5154 | o->flags |= SEC_RELOC; | |
5155 | else | |
5156 | { | |
5157 | /* Explicitly clear the SEC_RELOC flag. The linker tends to | |
5158 | set it (this is probably a bug) and if it is set | |
5159 | assign_section_numbers will create a reloc section. */ | |
5160 | o->flags &=~ SEC_RELOC; | |
5161 | } | |
5162 | } | |
5163 | ||
5164 | /* Figure out the file positions for everything but the symbol table | |
5165 | and the relocs. We set symcount to force assign_section_numbers | |
5166 | to create a symbol table. */ | |
5167 | abfd->symcount = info->strip == strip_all ? 0 : 1; | |
5168 | BFD_ASSERT (! abfd->output_has_begun); | |
5169 | if (! elf_compute_section_file_positions (abfd, info)) | |
5170 | goto error_return; | |
5171 | ||
5172 | /* That created the reloc sections. Set their sizes, and assign | |
5173 | them file positions, and allocate some buffers. */ | |
5174 | for (o = abfd->sections; o != NULL; o = o->next) | |
5175 | { | |
5176 | if ((o->flags & SEC_RELOC) != 0) | |
5177 | { | |
5178 | Elf_Internal_Shdr *rel_hdr; | |
5179 | register struct elf_link_hash_entry **p, **pend; | |
5180 | ||
5181 | rel_hdr = &elf_section_data (o)->rel_hdr; | |
5182 | ||
5183 | rel_hdr->sh_size = rel_hdr->sh_entsize * o->reloc_count; | |
5184 | ||
5185 | /* The contents field must last into write_object_contents, | |
5186 | so we allocate it with bfd_alloc rather than malloc. */ | |
5187 | rel_hdr->contents = (PTR) bfd_alloc (abfd, rel_hdr->sh_size); | |
5188 | if (rel_hdr->contents == NULL && rel_hdr->sh_size != 0) | |
5189 | { | |
5190 | bfd_set_error (bfd_error_no_memory); | |
5191 | goto error_return; | |
5192 | } | |
5193 | ||
5194 | p = ((struct elf_link_hash_entry **) | |
5195 | malloc (o->reloc_count | |
5196 | * sizeof (struct elf_link_hash_entry *))); | |
5197 | if (p == NULL && o->reloc_count != 0) | |
5198 | { | |
5199 | bfd_set_error (bfd_error_no_memory); | |
5200 | goto error_return; | |
5201 | } | |
5202 | elf_section_data (o)->rel_hashes = p; | |
5203 | pend = p + o->reloc_count; | |
5204 | for (; p < pend; p++) | |
5205 | *p = NULL; | |
5206 | ||
5207 | /* Use the reloc_count field as an index when outputting the | |
5208 | relocs. */ | |
5209 | o->reloc_count = 0; | |
5210 | } | |
5211 | } | |
5212 | ||
5213 | assign_file_positions_for_relocs (abfd); | |
5214 | ||
5215 | /* We have now assigned file positions for all the sections except | |
5216 | .symtab and .strtab. We start the .symtab section at the current | |
5217 | file position, and write directly to it. We build the .strtab | |
5218 | section in memory. When we add .dynsym support, we will build | |
5219 | that in memory as well (.dynsym is smaller than .symtab). */ | |
5220 | abfd->symcount = 0; | |
5221 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
5222 | /* sh_name is set in prep_headers. */ | |
5223 | symtab_hdr->sh_type = SHT_SYMTAB; | |
5224 | symtab_hdr->sh_flags = 0; | |
5225 | symtab_hdr->sh_addr = 0; | |
5226 | symtab_hdr->sh_size = 0; | |
5227 | symtab_hdr->sh_entsize = sizeof (Elf_External_Sym); | |
5228 | /* sh_link is set in assign_section_numbers. */ | |
5229 | /* sh_info is set below. */ | |
5230 | /* sh_offset is set just below. */ | |
5231 | symtab_hdr->sh_addralign = 4; /* FIXME: system dependent? */ | |
5232 | ||
5233 | off = elf_tdata (abfd)->next_file_pos; | |
013dec1a | 5234 | off = assign_file_position_for_section (symtab_hdr, off, true); |
6ec3bb6a ILT |
5235 | |
5236 | /* Note that at this point elf_tdata (abfd)->next_file_pos is | |
5237 | incorrect. We do not yet know the size of the .symtab section. | |
5238 | We correct next_file_pos below, after we do know the size. */ | |
5239 | ||
5240 | /* Allocate a buffer to hold swapped out symbols. This is to avoid | |
5241 | continuously seeking to the right position in the file. */ | |
5242 | if (! info->keep_memory || max_sym_count < 20) | |
5243 | finfo.symbuf_size = 20; | |
5244 | else | |
5245 | finfo.symbuf_size = max_sym_count; | |
5246 | finfo.symbuf = ((Elf_External_Sym *) | |
5247 | malloc (finfo.symbuf_size * sizeof (Elf_External_Sym))); | |
5248 | if (finfo.symbuf == NULL) | |
5249 | { | |
5250 | bfd_set_error (bfd_error_no_memory); | |
5251 | goto error_return; | |
5252 | } | |
5253 | ||
5254 | /* Start writing out the symbol table. The first symbol is always a | |
5255 | dummy symbol. */ | |
5256 | elfsym.st_value = 0; | |
5257 | elfsym.st_size = 0; | |
5258 | elfsym.st_info = 0; | |
5259 | elfsym.st_other = 0; | |
5260 | elfsym.st_shndx = SHN_UNDEF; | |
71edd06d ILT |
5261 | if (! elf_link_output_sym (&finfo, (const char *) NULL, |
5262 | &elfsym, bfd_und_section_ptr)) | |
6ec3bb6a ILT |
5263 | goto error_return; |
5264 | ||
5265 | #if 0 | |
5266 | /* Some standard ELF linkers do this, but we don't because it causes | |
5267 | bootstrap comparison failures. */ | |
5268 | /* Output a file symbol for the output file as the second symbol. | |
5269 | We output this even if we are discarding local symbols, although | |
5270 | I'm not sure if this is correct. */ | |
5271 | elfsym.st_value = 0; | |
5272 | elfsym.st_size = 0; | |
5273 | elfsym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE); | |
5274 | elfsym.st_other = 0; | |
5275 | elfsym.st_shndx = SHN_ABS; | |
71edd06d ILT |
5276 | if (! elf_link_output_sym (&finfo, bfd_get_filename (abfd), |
5277 | &elfsym, bfd_abs_section_ptr)) | |
6ec3bb6a ILT |
5278 | goto error_return; |
5279 | #endif | |
5280 | ||
5281 | /* Output a symbol for each section. We output these even if we are | |
5282 | discarding local symbols, since they are used for relocs. These | |
5283 | symbols have no names. We store the index of each one in the | |
5284 | index field of the section, so that we can find it again when | |
5285 | outputting relocs. */ | |
5286 | elfsym.st_value = 0; | |
5287 | elfsym.st_size = 0; | |
5288 | elfsym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION); | |
5289 | elfsym.st_other = 0; | |
013dec1a | 5290 | for (i = 1; i < elf_elfheader (abfd)->e_shnum; i++) |
6ec3bb6a | 5291 | { |
013dec1a | 5292 | o = section_from_elf_index (abfd, i); |
badd23e3 | 5293 | if (! bfd_is_abs_section (o)) |
013dec1a ILT |
5294 | o->target_index = abfd->symcount; |
5295 | elfsym.st_shndx = i; | |
71edd06d ILT |
5296 | if (! elf_link_output_sym (&finfo, (const char *) NULL, |
5297 | &elfsym, o)) | |
6ec3bb6a ILT |
5298 | goto error_return; |
5299 | } | |
5300 | ||
5301 | /* Allocate some memory to hold information read in from the input | |
5302 | files. */ | |
5303 | finfo.contents = (bfd_byte *) malloc (max_contents_size); | |
5304 | finfo.external_relocs = (PTR) malloc (max_external_reloc_size); | |
5305 | finfo.internal_relocs = ((Elf_Internal_Rela *) | |
5306 | malloc (max_internal_reloc_count | |
5307 | * sizeof (Elf_Internal_Rela))); | |
5308 | finfo.external_syms = ((Elf_External_Sym *) | |
5309 | malloc (max_sym_count * sizeof (Elf_External_Sym))); | |
5310 | finfo.internal_syms = ((Elf_Internal_Sym *) | |
5311 | malloc (max_sym_count * sizeof (Elf_Internal_Sym))); | |
5312 | finfo.indices = (long *) malloc (max_sym_count * sizeof (long)); | |
5313 | finfo.sections = (asection **) malloc (max_sym_count * sizeof (asection *)); | |
5314 | if ((finfo.contents == NULL && max_contents_size != 0) | |
5315 | || (finfo.external_relocs == NULL && max_external_reloc_size != 0) | |
5316 | || (finfo.internal_relocs == NULL && max_internal_reloc_count != 0) | |
5317 | || (finfo.external_syms == NULL && max_sym_count != 0) | |
5318 | || (finfo.internal_syms == NULL && max_sym_count != 0) | |
5319 | || (finfo.indices == NULL && max_sym_count != 0) | |
5320 | || (finfo.sections == NULL && max_sym_count != 0)) | |
5321 | { | |
5322 | bfd_set_error (bfd_error_no_memory); | |
5323 | goto error_return; | |
5324 | } | |
5325 | ||
5326 | /* Since ELF permits relocations to be against local symbols, we | |
5327 | must have the local symbols available when we do the relocations. | |
5328 | Since we would rather only read the local symbols once, and we | |
5329 | would rather not keep them in memory, we handle all the | |
5330 | relocations for a single input file at the same time. | |
5331 | ||
5332 | Unfortunately, there is no way to know the total number of local | |
5333 | symbols until we have seen all of them, and the local symbol | |
5334 | indices precede the global symbol indices. This means that when | |
5335 | we are generating relocateable output, and we see a reloc against | |
5336 | a global symbol, we can not know the symbol index until we have | |
5337 | finished examining all the local symbols to see which ones we are | |
5338 | going to output. To deal with this, we keep the relocations in | |
5339 | memory, and don't output them until the end of the link. This is | |
5340 | an unfortunate waste of memory, but I don't see a good way around | |
5341 | it. Fortunately, it only happens when performing a relocateable | |
5342 | link, which is not the common case. FIXME: If keep_memory is set | |
5343 | we could write the relocs out and then read them again; I don't | |
5344 | know how bad the memory loss will be. */ | |
5345 | ||
5346 | for (sub = info->input_bfds; sub != NULL; sub = sub->next) | |
5347 | sub->output_has_begun = false; | |
5348 | for (o = abfd->sections; o != NULL; o = o->next) | |
5349 | { | |
5350 | for (p = o->link_order_head; p != NULL; p = p->next) | |
5351 | { | |
5352 | if (p->type == bfd_indirect_link_order | |
5353 | && (bfd_get_flavour (p->u.indirect.section->owner) | |
5354 | == bfd_target_elf_flavour)) | |
5355 | { | |
5356 | sub = p->u.indirect.section->owner; | |
5357 | if (! sub->output_has_begun) | |
5358 | { | |
5359 | if (! elf_link_input_bfd (&finfo, sub)) | |
5360 | goto error_return; | |
5361 | sub->output_has_begun = true; | |
5362 | } | |
5363 | } | |
5364 | else if (p->type == bfd_section_reloc_link_order | |
5365 | || p->type == bfd_symbol_reloc_link_order) | |
5366 | { | |
5367 | if (! elf_reloc_link_order (abfd, info, o, p)) | |
5368 | goto error_return; | |
5369 | } | |
5370 | else | |
5371 | { | |
5372 | if (! _bfd_default_link_order (abfd, info, o, p)) | |
5373 | goto error_return; | |
5374 | } | |
5375 | } | |
5376 | } | |
5377 | ||
5378 | /* That wrote out all the local symbols. Finish up the symbol table | |
5379 | with the global symbols. */ | |
5380 | ||
5381 | /* The sh_info field records the index of the first non local | |
5382 | symbol. */ | |
5383 | symtab_hdr->sh_info = abfd->symcount; | |
013dec1a ILT |
5384 | if (dynobj != NULL) |
5385 | elf_section_data (finfo.dynsym_sec->output_section)->this_hdr.sh_info = 1; | |
6ec3bb6a ILT |
5386 | |
5387 | /* We get the global symbols from the hash table. */ | |
013dec1a ILT |
5388 | elf_link_hash_traverse (elf_hash_table (info), elf_link_output_extsym, |
5389 | (PTR) &finfo); | |
6ec3bb6a ILT |
5390 | |
5391 | /* Flush all symbols to the file. */ | |
5392 | if (! elf_link_flush_output_syms (&finfo)) | |
5393 | return false; | |
5394 | ||
5395 | /* Now we know the size of the symtab section. */ | |
5396 | off += symtab_hdr->sh_size; | |
5397 | ||
5398 | /* Finish up the symbol string table (.strtab) section. */ | |
5399 | symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr; | |
5400 | /* sh_name was set in prep_headers. */ | |
5401 | symstrtab_hdr->sh_type = SHT_STRTAB; | |
5402 | symstrtab_hdr->sh_flags = 0; | |
5403 | symstrtab_hdr->sh_addr = 0; | |
5404 | symstrtab_hdr->sh_size = finfo.symstrtab->length; | |
5405 | symstrtab_hdr->sh_entsize = 0; | |
5406 | symstrtab_hdr->sh_link = 0; | |
5407 | symstrtab_hdr->sh_info = 0; | |
5408 | /* sh_offset is set just below. */ | |
5409 | symstrtab_hdr->sh_addralign = 1; | |
5410 | symstrtab_hdr->contents = (PTR) finfo.symstrtab->tab; | |
5411 | ||
013dec1a | 5412 | off = assign_file_position_for_section (symstrtab_hdr, off, true); |
6ec3bb6a ILT |
5413 | elf_tdata (abfd)->next_file_pos = off; |
5414 | ||
5415 | /* Adjust the relocs to have the correct symbol indices. */ | |
5416 | for (o = abfd->sections; o != NULL; o = o->next) | |
5417 | { | |
5418 | struct elf_link_hash_entry **rel_hash; | |
5419 | Elf_Internal_Shdr *rel_hdr; | |
6ec3bb6a ILT |
5420 | |
5421 | if ((o->flags & SEC_RELOC) == 0) | |
5422 | continue; | |
5423 | ||
5424 | rel_hash = elf_section_data (o)->rel_hashes; | |
5425 | rel_hdr = &elf_section_data (o)->rel_hdr; | |
5426 | for (i = 0; i < o->reloc_count; i++, rel_hash++) | |
5427 | { | |
5428 | if (*rel_hash == NULL) | |
5429 | continue; | |
5430 | ||
5431 | BFD_ASSERT ((*rel_hash)->indx >= 0); | |
5432 | ||
5433 | if (rel_hdr->sh_entsize == sizeof (Elf_External_Rel)) | |
5434 | { | |
5435 | Elf_External_Rel *erel; | |
5436 | Elf_Internal_Rel irel; | |
5437 | ||
5438 | erel = (Elf_External_Rel *) rel_hdr->contents + i; | |
5439 | elf_swap_reloc_in (abfd, erel, &irel); | |
5440 | irel.r_info = ELF_R_INFO ((*rel_hash)->indx, | |
5441 | ELF_R_TYPE (irel.r_info)); | |
5442 | elf_swap_reloc_out (abfd, &irel, erel); | |
5443 | } | |
5444 | else | |
5445 | { | |
5446 | Elf_External_Rela *erela; | |
5447 | Elf_Internal_Rela irela; | |
5448 | ||
5449 | BFD_ASSERT (rel_hdr->sh_entsize | |
5450 | == sizeof (Elf_External_Rela)); | |
5451 | ||
5452 | erela = (Elf_External_Rela *) rel_hdr->contents + i; | |
5453 | elf_swap_reloca_in (abfd, erela, &irela); | |
5454 | irela.r_info = ELF_R_INFO ((*rel_hash)->indx, | |
5455 | ELF_R_TYPE (irela.r_info)); | |
5456 | elf_swap_reloca_out (abfd, &irela, erela); | |
5457 | } | |
5458 | } | |
5459 | ||
5460 | /* Set the reloc_count field to 0 to prevent write_relocs from | |
5461 | trying to swap the relocs out itself. */ | |
5462 | o->reloc_count = 0; | |
5463 | } | |
5464 | ||
013dec1a ILT |
5465 | /* If we are linking against a dynamic object, finish up the dynamic |
5466 | linking information. */ | |
5467 | if (dynobj != NULL) | |
5468 | { | |
5469 | Elf_External_Dyn *dyncon, *dynconend; | |
013dec1a ILT |
5470 | |
5471 | /* Fix up .dynamic entries. */ | |
5472 | o = bfd_get_section_by_name (dynobj, ".dynamic"); | |
5473 | BFD_ASSERT (o != NULL); | |
5474 | ||
5475 | dyncon = (Elf_External_Dyn *) o->contents; | |
5476 | dynconend = (Elf_External_Dyn *) (o->contents + o->_raw_size); | |
5477 | for (; dyncon < dynconend; dyncon++) | |
5478 | { | |
5479 | Elf_Internal_Dyn dyn; | |
5480 | const char *name; | |
5481 | unsigned int type; | |
5482 | ||
5483 | elf_swap_dyn_in (dynobj, dyncon, &dyn); | |
5484 | ||
5485 | switch (dyn.d_tag) | |
5486 | { | |
5487 | default: | |
5488 | break; | |
5489 | ||
5490 | case DT_INIT: | |
5491 | name = ".init"; | |
5492 | goto get_vma; | |
5493 | case DT_FINI: | |
5494 | name = ".fini"; | |
5495 | goto get_vma; | |
5496 | case DT_HASH: | |
5497 | name = ".hash"; | |
5498 | goto get_vma; | |
5499 | case DT_STRTAB: | |
5500 | name = ".dynstr"; | |
5501 | goto get_vma; | |
5502 | case DT_SYMTAB: | |
5503 | name = ".dynsym"; | |
5504 | get_vma: | |
5505 | o = bfd_get_section_by_name (abfd, name); | |
5506 | BFD_ASSERT (o != NULL); | |
5507 | dyn.d_un.d_ptr = o->vma; | |
5508 | elf_swap_dyn_out (dynobj, &dyn, dyncon); | |
5509 | break; | |
5510 | ||
5511 | case DT_REL: | |
5512 | case DT_RELA: | |
5513 | case DT_RELSZ: | |
5514 | case DT_RELASZ: | |
5515 | if (dyn.d_tag == DT_REL || dyn.d_tag == DT_RELSZ) | |
5516 | type = SHT_REL; | |
5517 | else | |
5518 | type = SHT_RELA; | |
5519 | dyn.d_un.d_val = 0; | |
5520 | for (i = 1; i < elf_elfheader (abfd)->e_shnum; i++) | |
5521 | { | |
5522 | Elf_Internal_Shdr *hdr; | |
5523 | ||
5524 | hdr = elf_elfsections (abfd)[i]; | |
5525 | if (hdr->sh_type == type | |
5526 | && (hdr->sh_flags & SHF_ALLOC) != 0) | |
5527 | { | |
5528 | if (dyn.d_tag == DT_RELSZ || dyn.d_tag == DT_RELASZ) | |
5529 | dyn.d_un.d_val += hdr->sh_size; | |
5530 | else | |
5531 | { | |
5532 | if (dyn.d_un.d_val == 0 | |
5533 | || hdr->sh_addr < dyn.d_un.d_val) | |
5534 | dyn.d_un.d_val = hdr->sh_addr; | |
5535 | } | |
5536 | } | |
5537 | } | |
5538 | elf_swap_dyn_out (dynobj, &dyn, dyncon); | |
5539 | break; | |
5540 | } | |
5541 | } | |
5542 | ||
013dec1a ILT |
5543 | if (! (*bed->elf_backend_finish_dynamic_sections) (abfd, info)) |
5544 | goto error_return; | |
5545 | ||
5546 | for (o = dynobj->sections; o != NULL; o = o->next) | |
5547 | { | |
013dec1a ILT |
5548 | if ((o->flags & SEC_HAS_CONTENTS) == 0) |
5549 | continue; | |
8af74670 ILT |
5550 | if ((o->flags & SEC_IN_MEMORY) == 0) |
5551 | { | |
5552 | BFD_ASSERT (info->shared); | |
5553 | continue; | |
5554 | } | |
013dec1a ILT |
5555 | if (! bfd_set_section_contents (abfd, o->output_section, |
5556 | o->contents, o->output_offset, | |
5557 | o->_raw_size)) | |
5558 | goto error_return; | |
013dec1a ILT |
5559 | } |
5560 | } | |
5561 | ||
71edd06d ILT |
5562 | /* Now backend stuff. */ |
5563 | if (bed->elf_backend_final_write_processing) | |
5564 | (*bed->elf_backend_final_write_processing) (abfd, NULL); | |
5565 | ||
6ec3bb6a ILT |
5566 | if (finfo.contents != NULL) |
5567 | free (finfo.contents); | |
5568 | if (finfo.external_relocs != NULL) | |
5569 | free (finfo.external_relocs); | |
5570 | if (finfo.internal_relocs != NULL) | |
5571 | free (finfo.internal_relocs); | |
5572 | if (finfo.external_syms != NULL) | |
5573 | free (finfo.external_syms); | |
5574 | if (finfo.internal_syms != NULL) | |
5575 | free (finfo.internal_syms); | |
5576 | if (finfo.indices != NULL) | |
5577 | free (finfo.indices); | |
5578 | if (finfo.sections != NULL) | |
5579 | free (finfo.sections); | |
5580 | if (finfo.symbuf != NULL) | |
5581 | free (finfo.symbuf); | |
5582 | for (o = abfd->sections; o != NULL; o = o->next) | |
5583 | { | |
5584 | if ((o->flags & SEC_RELOC) != 0 | |
5585 | && elf_section_data (o)->rel_hashes != NULL) | |
5586 | free (elf_section_data (o)->rel_hashes); | |
5587 | } | |
5588 | ||
5589 | return true; | |
5590 | ||
5591 | error_return: | |
5592 | if (finfo.contents != NULL) | |
5593 | free (finfo.contents); | |
5594 | if (finfo.external_relocs != NULL) | |
5595 | free (finfo.external_relocs); | |
5596 | if (finfo.internal_relocs != NULL) | |
5597 | free (finfo.internal_relocs); | |
5598 | if (finfo.external_syms != NULL) | |
5599 | free (finfo.external_syms); | |
5600 | if (finfo.internal_syms != NULL) | |
5601 | free (finfo.internal_syms); | |
5602 | if (finfo.indices != NULL) | |
5603 | free (finfo.indices); | |
5604 | if (finfo.sections != NULL) | |
5605 | free (finfo.sections); | |
5606 | if (finfo.symbuf != NULL) | |
5607 | free (finfo.symbuf); | |
5608 | for (o = abfd->sections; o != NULL; o = o->next) | |
5609 | { | |
5610 | if ((o->flags & SEC_RELOC) != 0 | |
5611 | && elf_section_data (o)->rel_hashes != NULL) | |
5612 | free (elf_section_data (o)->rel_hashes); | |
5613 | } | |
5614 | ||
5615 | return false; | |
5616 | } | |
5617 | ||
5618 | /* Add a symbol to the output symbol table. */ | |
5619 | ||
5620 | static boolean | |
71edd06d | 5621 | elf_link_output_sym (finfo, name, elfsym, input_sec) |
6ec3bb6a ILT |
5622 | struct elf_final_link_info *finfo; |
5623 | const char *name; | |
5624 | Elf_Internal_Sym *elfsym; | |
71edd06d | 5625 | asection *input_sec; |
6ec3bb6a | 5626 | { |
71edd06d ILT |
5627 | boolean (*output_symbol_hook) PARAMS ((bfd *, |
5628 | struct bfd_link_info *info, | |
5629 | const char *, | |
5630 | Elf_Internal_Sym *, | |
5631 | asection *)); | |
5632 | ||
5633 | output_symbol_hook = get_elf_backend_data (finfo->output_bfd)-> | |
5634 | elf_backend_link_output_symbol_hook; | |
5635 | if (! ((*output_symbol_hook) | |
5636 | (finfo->output_bfd, finfo->info, name, elfsym, input_sec))) | |
5637 | return false; | |
5638 | ||
6ec3bb6a ILT |
5639 | if (name == (const char *) NULL || *name == '\0') |
5640 | elfsym->st_name = 0; | |
5641 | else | |
5642 | { | |
5643 | elfsym->st_name = bfd_add_to_strtab (finfo->output_bfd, | |
5644 | finfo->symstrtab, name); | |
5645 | if (elfsym->st_name == (unsigned long) -1) | |
5646 | return false; | |
5647 | } | |
5648 | ||
5649 | if (finfo->symbuf_count >= finfo->symbuf_size) | |
5650 | { | |
5651 | if (! elf_link_flush_output_syms (finfo)) | |
5652 | return false; | |
5653 | } | |
5654 | ||
5655 | elf_swap_symbol_out (finfo->output_bfd, elfsym, | |
5656 | finfo->symbuf + finfo->symbuf_count); | |
5657 | ++finfo->symbuf_count; | |
5658 | ||
5659 | ++finfo->output_bfd->symcount; | |
5660 | ||
5661 | return true; | |
5662 | } | |
5663 | ||
5664 | /* Flush the output symbols to the file. */ | |
5665 | ||
5666 | static boolean | |
5667 | elf_link_flush_output_syms (finfo) | |
5668 | struct elf_final_link_info *finfo; | |
5669 | { | |
5670 | Elf_Internal_Shdr *symtab; | |
5671 | ||
5672 | symtab = &elf_tdata (finfo->output_bfd)->symtab_hdr; | |
5673 | ||
5674 | if (bfd_seek (finfo->output_bfd, symtab->sh_offset + symtab->sh_size, | |
5675 | SEEK_SET) != 0 | |
5676 | || (bfd_write ((PTR) finfo->symbuf, finfo->symbuf_count, | |
5677 | sizeof (Elf_External_Sym), finfo->output_bfd) | |
5678 | != finfo->symbuf_count * sizeof (Elf_External_Sym))) | |
5679 | return false; | |
5680 | ||
5681 | symtab->sh_size += finfo->symbuf_count * sizeof (Elf_External_Sym); | |
5682 | ||
5683 | finfo->symbuf_count = 0; | |
5684 | ||
5685 | return true; | |
5686 | } | |
5687 | ||
5688 | /* Add an external symbol to the symbol table. This is called from | |
5689 | the hash table traversal routine. */ | |
5690 | ||
5691 | static boolean | |
5692 | elf_link_output_extsym (h, data) | |
5693 | struct elf_link_hash_entry *h; | |
5694 | PTR data; | |
5695 | { | |
5696 | struct elf_final_link_info *finfo = (struct elf_final_link_info *) data; | |
013dec1a | 5697 | boolean strip; |
6ec3bb6a | 5698 | Elf_Internal_Sym sym; |
71edd06d | 5699 | asection *input_sec; |
6ec3bb6a | 5700 | |
013dec1a ILT |
5701 | /* We don't want to output symbols that have never been mentioned by |
5702 | a regular file, or that we have been told to strip. However, if | |
5703 | h->indx is set to -2, the symbol is used by a reloc and we must | |
5704 | output it. */ | |
5705 | if (h->indx == -2) | |
5706 | strip = false; | |
5315c428 ILT |
5707 | else if (((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 |
5708 | || (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0) | |
5709 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0 | |
013dec1a ILT |
5710 | && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) == 0) |
5711 | strip = true; | |
5712 | else if (finfo->info->strip == strip_all | |
5713 | || (finfo->info->strip == strip_some | |
5714 | && bfd_hash_lookup (finfo->info->keep_hash, | |
5715 | h->root.root.string, | |
5716 | false, false) == NULL)) | |
5717 | strip = true; | |
5718 | else | |
5719 | strip = false; | |
5720 | ||
5721 | /* If we're stripping it, and it's not a dynamic symbol, there's | |
5722 | nothing else to do. */ | |
5723 | if (strip && h->dynindx == -1) | |
6ec3bb6a ILT |
5724 | return true; |
5725 | ||
5726 | sym.st_value = 0; | |
5727 | sym.st_size = h->size; | |
5728 | sym.st_info = ELF_ST_INFO (STB_GLOBAL, h->type); | |
5729 | sym.st_other = 0; | |
5730 | ||
5731 | switch (h->root.type) | |
5732 | { | |
5733 | default: | |
5734 | case bfd_link_hash_new: | |
5735 | abort (); | |
5736 | return false; | |
5737 | ||
5738 | case bfd_link_hash_undefined: | |
71edd06d | 5739 | input_sec = bfd_und_section_ptr; |
6ec3bb6a ILT |
5740 | sym.st_shndx = SHN_UNDEF; |
5741 | break; | |
5742 | ||
5743 | case bfd_link_hash_weak: | |
71edd06d | 5744 | input_sec = bfd_und_section_ptr; |
6ec3bb6a ILT |
5745 | sym.st_shndx = SHN_UNDEF; |
5746 | sym.st_info = ELF_ST_INFO (STB_WEAK, h->type); | |
5747 | break; | |
5748 | ||
5749 | case bfd_link_hash_defined: | |
5750 | { | |
6ec3bb6a | 5751 | |
71edd06d ILT |
5752 | input_sec = h->root.u.def.section; |
5753 | if (input_sec->output_section != NULL) | |
6ec3bb6a | 5754 | { |
013dec1a | 5755 | sym.st_shndx = elf_section_from_bfd_section (finfo->output_bfd, |
71edd06d | 5756 | input_sec->output_section); |
013dec1a ILT |
5757 | if (sym.st_shndx == (unsigned short) -1) |
5758 | { | |
5759 | /* FIXME: No way to handle errors. */ | |
5760 | abort (); | |
5761 | } | |
6ec3bb6a | 5762 | |
013dec1a ILT |
5763 | /* ELF symbols in relocateable files are section relative, |
5764 | but in nonrelocateable files they are virtual | |
5765 | addresses. */ | |
71edd06d | 5766 | sym.st_value = h->root.u.def.value + input_sec->output_offset; |
013dec1a | 5767 | if (! finfo->info->relocateable) |
71edd06d | 5768 | sym.st_value += input_sec->output_section->vma; |
013dec1a ILT |
5769 | } |
5770 | else | |
5771 | { | |
71edd06d ILT |
5772 | BFD_ASSERT (bfd_get_flavour (input_sec->owner) |
5773 | == bfd_target_elf_flavour | |
5774 | && elf_elfheader (input_sec->owner)->e_type == ET_DYN); | |
013dec1a | 5775 | sym.st_shndx = SHN_UNDEF; |
71edd06d | 5776 | input_sec = bfd_und_section_ptr; |
013dec1a | 5777 | } |
6ec3bb6a ILT |
5778 | } |
5779 | break; | |
5780 | ||
5781 | case bfd_link_hash_common: | |
71edd06d | 5782 | input_sec = bfd_com_section_ptr; |
6ec3bb6a ILT |
5783 | sym.st_shndx = SHN_COMMON; |
5784 | if (h->align == 0) | |
5785 | sym.st_value = 1; | |
5786 | else | |
5787 | sym.st_value = h->align; | |
5788 | break; | |
5789 | ||
5790 | case bfd_link_hash_indirect: | |
5791 | case bfd_link_hash_warning: | |
5792 | /* I have no idea how these should be handled. */ | |
5793 | return true; | |
5794 | } | |
5795 | ||
013dec1a ILT |
5796 | /* If this symbol should be put in the .dynsym section, then put it |
5797 | there now. We have already know the symbol index. We also fill | |
5798 | in the entry in the .hash section. */ | |
5799 | if (h->dynindx != -1) | |
5800 | { | |
5801 | struct elf_backend_data *bed; | |
5802 | size_t bucketcount; | |
5803 | size_t bucket; | |
5804 | bfd_byte *bucketpos; | |
5805 | bfd_vma chain; | |
5806 | ||
5807 | sym.st_name = h->dynstr_index; | |
5808 | ||
5809 | /* Give the processor backend a chance to tweak the symbol | |
5810 | value, and also to finish up anything that needs to be done | |
5811 | for this symbol. */ | |
5812 | bed = get_elf_backend_data (finfo->output_bfd); | |
5813 | if (! ((*bed->elf_backend_finish_dynamic_symbol) | |
5814 | (finfo->output_bfd, finfo->info, h, &sym))) | |
5815 | { | |
5816 | /* FIXME: No way to return error. */ | |
5817 | abort (); | |
5818 | } | |
5819 | ||
5820 | elf_swap_symbol_out (finfo->output_bfd, &sym, | |
5821 | ((Elf_External_Sym *) finfo->dynsym_sec->contents | |
5822 | + h->dynindx)); | |
5823 | ||
5824 | bucketcount = elf_hash_table (finfo->info)->bucketcount; | |
5825 | bucket = bfd_elf_hash (h->root.root.string) % bucketcount; | |
5826 | bucketpos = ((bfd_byte *) finfo->hash_sec->contents | |
5827 | + (bucket + 2) * (ARCH_SIZE / 8)); | |
5828 | chain = get_word (finfo->output_bfd, bucketpos); | |
5829 | put_word (finfo->output_bfd, h->dynindx, bucketpos); | |
5830 | put_word (finfo->output_bfd, chain, | |
5831 | ((bfd_byte *) finfo->hash_sec->contents | |
5832 | + (bucketcount + 2 + h->dynindx) * (ARCH_SIZE / 8))); | |
5833 | } | |
5834 | ||
5835 | /* If we're stripping it, then it was just a dynamic symbol, and | |
5836 | there's nothing else to do. */ | |
5837 | if (strip) | |
5838 | return true; | |
5839 | ||
6ec3bb6a ILT |
5840 | h->indx = finfo->output_bfd->symcount; |
5841 | ||
71edd06d | 5842 | if (! elf_link_output_sym (finfo, h->root.root.string, &sym, input_sec)) |
6ec3bb6a ILT |
5843 | { |
5844 | /* FIXME: No way to return error. */ | |
5845 | abort (); | |
5846 | } | |
5847 | ||
5848 | return true; | |
5849 | } | |
5850 | ||
5851 | /* Link an input file into the linker output file. This function | |
5852 | handles all the sections and relocations of the input file at once. | |
5853 | This is so that we only have to read the local symbols once, and | |
5854 | don't have to keep them in memory. */ | |
5855 | ||
5856 | static boolean | |
5857 | elf_link_input_bfd (finfo, input_bfd) | |
5858 | struct elf_final_link_info *finfo; | |
5859 | bfd *input_bfd; | |
5860 | { | |
5861 | boolean (*relocate_section) PARAMS ((bfd *, struct bfd_link_info *, | |
5862 | bfd *, asection *, bfd_byte *, | |
5863 | Elf_Internal_Rela *, | |
5864 | Elf_Internal_Sym *, | |
71edd06d | 5865 | asection **, char *)); |
6ec3bb6a ILT |
5866 | bfd *output_bfd; |
5867 | Elf_Internal_Shdr *symtab_hdr; | |
5315c428 ILT |
5868 | size_t locsymcount; |
5869 | size_t extsymoff; | |
6ec3bb6a ILT |
5870 | Elf_External_Sym *esym; |
5871 | Elf_External_Sym *esymend; | |
5872 | Elf_Internal_Sym *isym; | |
5873 | long *pindex; | |
5874 | asection **ppsection; | |
5875 | asection *o; | |
5876 | ||
5877 | output_bfd = finfo->output_bfd; | |
5878 | relocate_section = | |
5879 | get_elf_backend_data (output_bfd)->elf_backend_relocate_section; | |
5880 | ||
013dec1a ILT |
5881 | /* If this is a dynamic object, we don't want to do anything here: |
5882 | we don't want the local symbols, and we don't want the section | |
5883 | contents. */ | |
5884 | if (elf_elfheader (input_bfd)->e_type == ET_DYN) | |
5885 | return true; | |
5886 | ||
6ec3bb6a | 5887 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
5315c428 ILT |
5888 | if (elf_bad_symtab (input_bfd)) |
5889 | { | |
5890 | locsymcount = symtab_hdr->sh_size / sizeof (Elf_External_Sym); | |
5891 | extsymoff = 0; | |
5892 | } | |
5893 | else | |
5894 | { | |
5895 | locsymcount = symtab_hdr->sh_info; | |
5896 | extsymoff = symtab_hdr->sh_info; | |
5897 | } | |
5898 | ||
5899 | /* Read the local symbols. */ | |
c46b8ed7 JL |
5900 | if (locsymcount > 0 |
5901 | && (bfd_seek (input_bfd, symtab_hdr->sh_offset, SEEK_SET) != 0 | |
5902 | || (bfd_read (finfo->external_syms, sizeof (Elf_External_Sym), | |
5903 | locsymcount, input_bfd) | |
5904 | != locsymcount * sizeof (Elf_External_Sym)))) | |
6ec3bb6a ILT |
5905 | return false; |
5906 | ||
5907 | /* Swap in the local symbols and write out the ones which we know | |
5908 | are going into the output file. */ | |
5909 | esym = finfo->external_syms; | |
5315c428 | 5910 | esymend = esym + locsymcount; |
6ec3bb6a ILT |
5911 | isym = finfo->internal_syms; |
5912 | pindex = finfo->indices; | |
5913 | ppsection = finfo->sections; | |
5914 | for (; esym < esymend; esym++, isym++, pindex++, ppsection++) | |
5915 | { | |
5916 | asection *isec; | |
5917 | const char *name; | |
5918 | bfd_vma oldval; | |
5919 | ||
5920 | elf_swap_symbol_in (input_bfd, esym, isym); | |
5921 | *pindex = -1; | |
5922 | ||
5315c428 ILT |
5923 | if (elf_bad_symtab (input_bfd)) |
5924 | { | |
5925 | if (ELF_ST_BIND (isym->st_info) != STB_LOCAL) | |
5926 | { | |
5927 | *ppsection = NULL; | |
5928 | continue; | |
5929 | } | |
5930 | } | |
5931 | ||
6ec3bb6a | 5932 | if (isym->st_shndx == SHN_UNDEF) |
badd23e3 | 5933 | isec = bfd_und_section_ptr; |
6ec3bb6a ILT |
5934 | else if (isym->st_shndx > 0 && isym->st_shndx < SHN_LORESERVE) |
5935 | { | |
5936 | isec = section_from_elf_index (input_bfd, isym->st_shndx); | |
5937 | if (isec == NULL) | |
5938 | return false; | |
5939 | } | |
5940 | else if (isym->st_shndx == SHN_ABS) | |
badd23e3 | 5941 | isec = bfd_abs_section_ptr; |
6ec3bb6a | 5942 | else if (isym->st_shndx == SHN_COMMON) |
badd23e3 | 5943 | isec = bfd_com_section_ptr; |
6ec3bb6a ILT |
5944 | else |
5945 | { | |
5946 | /* Who knows? */ | |
5947 | isec = NULL; | |
5948 | } | |
5949 | ||
5950 | *ppsection = isec; | |
5951 | ||
5952 | /* Don't output the first, undefined, symbol. */ | |
5953 | if (esym == finfo->external_syms) | |
5954 | continue; | |
5955 | ||
5956 | /* If we are stripping all symbols, we don't want to output this | |
5957 | one. */ | |
5958 | if (finfo->info->strip == strip_all) | |
5959 | continue; | |
5960 | ||
5961 | /* We never output section symbols. Instead, we use the section | |
5962 | symbol of the corresponding section in the output file. */ | |
5963 | if (ELF_ST_TYPE (isym->st_info) == STT_SECTION) | |
5964 | continue; | |
5965 | ||
5966 | /* If we are discarding all local symbols, we don't want to | |
5967 | output this one. If we are generating a relocateable output | |
5968 | file, then some of the local symbols may be required by | |
5969 | relocs; we output them below as we discover that they are | |
5970 | needed. */ | |
5971 | if (finfo->info->discard == discard_all) | |
5972 | continue; | |
5973 | ||
5974 | /* Get the name of the symbol. */ | |
5975 | name = elf_string_from_elf_section (input_bfd, symtab_hdr->sh_link, | |
5976 | isym->st_name); | |
5977 | if (name == NULL) | |
5978 | return false; | |
5979 | ||
5980 | /* See if we are discarding symbols with this name. */ | |
5981 | if ((finfo->info->strip == strip_some | |
5982 | && (bfd_hash_lookup (finfo->info->keep_hash, name, false, false) | |
5983 | == NULL)) | |
5984 | || (finfo->info->discard == discard_l | |
5985 | && strncmp (name, finfo->info->lprefix, | |
5986 | finfo->info->lprefix_len) == 0)) | |
5987 | continue; | |
5988 | ||
5989 | /* If we get here, we are going to output this symbol. */ | |
5990 | ||
5991 | /* Adjust the section index for the output file. */ | |
5992 | isym->st_shndx = elf_section_from_bfd_section (output_bfd, | |
5993 | isec->output_section); | |
013dec1a | 5994 | if (isym->st_shndx == (unsigned short) -1) |
6ec3bb6a ILT |
5995 | return false; |
5996 | ||
5997 | *pindex = output_bfd->symcount; | |
5998 | ||
5999 | /* ELF symbols in relocateable files are section relative, but | |
6000 | in executable files they are virtual addresses. Note that | |
6001 | this code assumes that all ELF sections have an associated | |
6002 | BFD section with a reasonable value for output_offset; below | |
6003 | we assume that they also have a reasonable value for | |
6004 | output_section. Any special sections must be set up to meet | |
6005 | these requirements. */ | |
6006 | oldval = isym->st_value; | |
6007 | isym->st_value += isec->output_offset; | |
6008 | if (! finfo->info->relocateable) | |
6009 | isym->st_value += isec->output_section->vma; | |
6010 | ||
71edd06d | 6011 | if (! elf_link_output_sym (finfo, name, isym, isec)) |
6ec3bb6a ILT |
6012 | return false; |
6013 | ||
6014 | /* Restore the old value for reloc handling. */ | |
6015 | isym->st_value = oldval; | |
6016 | } | |
6017 | ||
6018 | /* Relocate the contents of each section. */ | |
6019 | for (o = input_bfd->sections; o != NULL; o = o->next) | |
6020 | { | |
6021 | Elf_Internal_Shdr *input_rel_hdr; | |
6022 | ||
6023 | if ((o->flags & SEC_HAS_CONTENTS) == 0) | |
6024 | continue; | |
6025 | ||
8af74670 ILT |
6026 | if ((o->flags & SEC_IN_MEMORY) != 0 |
6027 | && input_bfd == elf_hash_table (finfo->info)->dynobj) | |
6028 | { | |
6029 | /* Section was created by elf_link_create_dynamic_sections. | |
6030 | FIXME: This test is fragile. */ | |
6031 | continue; | |
6032 | } | |
6033 | ||
6ec3bb6a ILT |
6034 | /* Read the contents of the section. */ |
6035 | if (! bfd_get_section_contents (input_bfd, o, finfo->contents, | |
6036 | (file_ptr) 0, o->_raw_size)) | |
6037 | return false; | |
6038 | ||
6039 | if ((o->flags & SEC_RELOC) != 0) | |
6040 | { | |
6041 | /* Read in the relocs. */ | |
6042 | input_rel_hdr = &elf_section_data (o)->rel_hdr; | |
6043 | if (bfd_seek (input_bfd, input_rel_hdr->sh_offset, SEEK_SET) != 0 | |
6044 | || bfd_read (finfo->external_relocs, 1, input_rel_hdr->sh_size, | |
6045 | input_bfd) != input_rel_hdr->sh_size) | |
6046 | return false; | |
6047 | ||
6048 | /* Swap in the relocs. For convenience, we always produce | |
6049 | an Elf_Internal_Rela array; if the relocs are Rel, we set | |
6050 | the addend to 0. */ | |
6051 | if (input_rel_hdr->sh_entsize == sizeof (Elf_External_Rel)) | |
6052 | { | |
6053 | Elf_External_Rel *erel; | |
6054 | Elf_External_Rel *erelend; | |
6055 | Elf_Internal_Rela *irela; | |
6056 | ||
6057 | erel = (Elf_External_Rel *) finfo->external_relocs; | |
6058 | erelend = erel + o->reloc_count; | |
6059 | irela = finfo->internal_relocs; | |
6060 | for (; erel < erelend; erel++, irela++) | |
6061 | { | |
6062 | Elf_Internal_Rel irel; | |
6063 | ||
6064 | elf_swap_reloc_in (input_bfd, erel, &irel); | |
6065 | irela->r_offset = irel.r_offset; | |
6066 | irela->r_info = irel.r_info; | |
6067 | irela->r_addend = 0; | |
6068 | } | |
6069 | } | |
6070 | else | |
6071 | { | |
6072 | Elf_External_Rela *erela; | |
6073 | Elf_External_Rela *erelaend; | |
6074 | Elf_Internal_Rela *irela; | |
6075 | ||
6076 | BFD_ASSERT (input_rel_hdr->sh_entsize | |
6077 | == sizeof (Elf_External_Rela)); | |
6078 | ||
6079 | erela = (Elf_External_Rela *) finfo->external_relocs; | |
6080 | erelaend = erela + o->reloc_count; | |
6081 | irela = finfo->internal_relocs; | |
6082 | for (; erela < erelaend; erela++, irela++) | |
6083 | elf_swap_reloca_in (input_bfd, erela, irela); | |
6084 | } | |
6085 | ||
6086 | /* Relocate the section by invoking a back end routine. | |
6087 | ||
6088 | The back end routine is responsible for adjusting the | |
6089 | section contents as necessary, and (if using Rela relocs | |
6090 | and generating a relocateable output file) adjusting the | |
6091 | reloc addend as necessary. | |
6092 | ||
6093 | The back end routine does not have to worry about setting | |
6094 | the reloc address or the reloc symbol index. | |
6095 | ||
6096 | The back end routine is given a pointer to the swapped in | |
6097 | internal symbols, and can access the hash table entries | |
6098 | for the external symbols via elf_sym_hashes (input_bfd). | |
6099 | ||
6100 | When generating relocateable output, the back end routine | |
6101 | must handle STB_LOCAL/STT_SECTION symbols specially. The | |
6102 | output symbol is going to be a section symbol | |
6103 | corresponding to the output section, which will require | |
6104 | the addend to be adjusted. */ | |
6105 | ||
6106 | if (! (*relocate_section) (output_bfd, finfo->info, | |
6107 | input_bfd, o, | |
6108 | finfo->contents, | |
6109 | finfo->internal_relocs, | |
6110 | finfo->internal_syms, | |
71edd06d ILT |
6111 | finfo->sections, |
6112 | finfo->symstrtab->tab)) | |
6ec3bb6a ILT |
6113 | return false; |
6114 | ||
6115 | if (finfo->info->relocateable) | |
6116 | { | |
6117 | Elf_Internal_Rela *irela; | |
6118 | Elf_Internal_Rela *irelaend; | |
6119 | struct elf_link_hash_entry **rel_hash; | |
6120 | Elf_Internal_Shdr *output_rel_hdr; | |
6121 | ||
6122 | /* Adjust the reloc addresses and symbol indices. */ | |
6123 | ||
6124 | irela = finfo->internal_relocs; | |
6125 | irelaend = irela + o->reloc_count; | |
6126 | rel_hash = (elf_section_data (o->output_section)->rel_hashes | |
6127 | + o->output_section->reloc_count); | |
6128 | for (; irela < irelaend; irela++, rel_hash++) | |
6129 | { | |
6130 | long r_symndx; | |
6131 | Elf_Internal_Sym *isym; | |
6132 | asection *sec; | |
6133 | ||
6134 | irela->r_offset += o->output_offset; | |
6135 | ||
6136 | r_symndx = ELF_R_SYM (irela->r_info); | |
6137 | ||
6138 | if (r_symndx == 0) | |
6139 | continue; | |
6140 | ||
5315c428 ILT |
6141 | if (r_symndx >= locsymcount |
6142 | || (elf_bad_symtab (input_bfd) | |
6143 | && finfo->sections[r_symndx] == NULL)) | |
6ec3bb6a ILT |
6144 | { |
6145 | long indx; | |
6146 | ||
6147 | /* This is a reloc against a global symbol. We | |
6148 | have not yet output all the local symbols, so | |
6149 | we do not know the symbol index of any global | |
6150 | symbol. We set the rel_hash entry for this | |
6151 | reloc to point to the global hash table entry | |
6152 | for this symbol. The symbol index is then | |
6153 | set at the end of elf_bfd_final_link. */ | |
5315c428 | 6154 | indx = r_symndx - extsymoff; |
6ec3bb6a ILT |
6155 | *rel_hash = elf_sym_hashes (input_bfd)[indx]; |
6156 | ||
6157 | /* Setting the index to -2 tells | |
6158 | elf_link_output_extsym that this symbol is | |
6159 | used by a reloc. */ | |
6160 | BFD_ASSERT ((*rel_hash)->indx < 0); | |
6161 | (*rel_hash)->indx = -2; | |
6162 | ||
6163 | continue; | |
6164 | } | |
6165 | ||
6166 | /* This is a reloc against a local symbol. */ | |
6167 | ||
6168 | *rel_hash = NULL; | |
6169 | isym = finfo->internal_syms + r_symndx; | |
6170 | sec = finfo->sections[r_symndx]; | |
6171 | if (ELF_ST_TYPE (isym->st_info) == STT_SECTION) | |
6172 | { | |
6173 | /* I suppose the backend ought to fill in the | |
6174 | section of any STT_SECTION symbol against a | |
6175 | processor specific section. */ | |
badd23e3 ILT |
6176 | if (sec != NULL && bfd_is_abs_section (sec)) |
6177 | r_symndx = 0; | |
6178 | else if (sec == NULL || sec->owner == NULL) | |
6ec3bb6a ILT |
6179 | { |
6180 | bfd_set_error (bfd_error_bad_value); | |
6181 | return false; | |
6182 | } | |
6ec3bb6a | 6183 | else |
013dec1a ILT |
6184 | { |
6185 | r_symndx = sec->output_section->target_index; | |
6186 | if (r_symndx == 0) | |
6187 | abort (); | |
6188 | } | |
6ec3bb6a ILT |
6189 | } |
6190 | else | |
6191 | { | |
6192 | if (finfo->indices[r_symndx] == -1) | |
6193 | { | |
6194 | unsigned long link; | |
6195 | const char *name; | |
6196 | asection *osec; | |
6197 | ||
6198 | if (finfo->info->strip == strip_all) | |
6199 | { | |
6200 | /* You can't do ld -r -s. */ | |
6201 | bfd_set_error (bfd_error_invalid_operation); | |
6202 | return false; | |
6203 | } | |
6204 | ||
6205 | /* This symbol was skipped earlier, but | |
6206 | since it is needed by a reloc, we | |
6207 | must output it now. */ | |
6208 | link = symtab_hdr->sh_link; | |
6209 | name = elf_string_from_elf_section (input_bfd, | |
6210 | link, | |
6211 | isym->st_name); | |
6212 | if (name == NULL) | |
6213 | return false; | |
6214 | ||
6215 | osec = sec->output_section; | |
6216 | isym->st_shndx = | |
6217 | elf_section_from_bfd_section (output_bfd, | |
6218 | osec); | |
013dec1a | 6219 | if (isym->st_shndx == (unsigned short) -1) |
6ec3bb6a ILT |
6220 | return false; |
6221 | ||
6222 | isym->st_value += sec->output_offset; | |
6223 | if (! finfo->info->relocateable) | |
6224 | isym->st_value += osec->vma; | |
6225 | ||
6226 | finfo->indices[r_symndx] = output_bfd->symcount; | |
6227 | ||
71edd06d | 6228 | if (! elf_link_output_sym (finfo, name, isym, sec)) |
6ec3bb6a ILT |
6229 | return false; |
6230 | } | |
6231 | ||
6232 | r_symndx = finfo->indices[r_symndx]; | |
6233 | } | |
6234 | ||
6235 | irela->r_info = ELF_R_INFO (r_symndx, | |
6236 | ELF_R_TYPE (irela->r_info)); | |
6237 | } | |
6238 | ||
6239 | /* Swap out the relocs. */ | |
6240 | output_rel_hdr = &elf_section_data (o->output_section)->rel_hdr; | |
6241 | BFD_ASSERT (output_rel_hdr->sh_entsize | |
6242 | == input_rel_hdr->sh_entsize); | |
6243 | irela = finfo->internal_relocs; | |
6244 | irelaend = irela + o->reloc_count; | |
6245 | if (input_rel_hdr->sh_entsize == sizeof (Elf_External_Rel)) | |
6246 | { | |
6247 | Elf_External_Rel *erel; | |
6248 | ||
6249 | erel = ((Elf_External_Rel *) output_rel_hdr->contents | |
6250 | + o->output_section->reloc_count); | |
6251 | for (; irela < irelaend; irela++, erel++) | |
6252 | { | |
6253 | Elf_Internal_Rel irel; | |
6254 | ||
6255 | irel.r_offset = irela->r_offset; | |
6256 | irel.r_info = irela->r_info; | |
6257 | BFD_ASSERT (irela->r_addend == 0); | |
6258 | elf_swap_reloc_out (output_bfd, &irel, erel); | |
6259 | } | |
6260 | } | |
6261 | else | |
6262 | { | |
6263 | Elf_External_Rela *erela; | |
6264 | ||
6265 | BFD_ASSERT (input_rel_hdr->sh_entsize | |
6266 | == sizeof (Elf_External_Rela)); | |
6267 | erela = ((Elf_External_Rela *) output_rel_hdr->contents | |
6268 | + o->output_section->reloc_count); | |
6269 | for (; irela < irelaend; irela++, erela++) | |
6270 | elf_swap_reloca_out (output_bfd, irela, erela); | |
6271 | } | |
6272 | ||
6273 | o->output_section->reloc_count += o->reloc_count; | |
6274 | } | |
6275 | } | |
6276 | ||
6277 | /* Write out the modified section contents. */ | |
6278 | if (! bfd_set_section_contents (output_bfd, o->output_section, | |
6279 | finfo->contents, o->output_offset, | |
6280 | (o->_cooked_size != 0 | |
6281 | ? o->_cooked_size | |
6282 | : o->_raw_size))) | |
6283 | return false; | |
6284 | } | |
6285 | ||
6286 | return true; | |
6287 | } | |
6288 | ||
6289 | /* Generate a reloc when linking an ELF file. This is a reloc | |
6290 | requested by the linker, and does come from any input file. This | |
6291 | is used to build constructor and destructor tables when linking | |
6292 | with -Ur. */ | |
6293 | ||
6294 | static boolean | |
6295 | elf_reloc_link_order (output_bfd, info, output_section, link_order) | |
6296 | bfd *output_bfd; | |
6297 | struct bfd_link_info *info; | |
6298 | asection *output_section; | |
6299 | struct bfd_link_order *link_order; | |
6300 | { | |
6301 | const reloc_howto_type *howto; | |
6302 | long indx; | |
6303 | bfd_vma offset; | |
6304 | struct elf_link_hash_entry **rel_hash_ptr; | |
6305 | Elf_Internal_Shdr *rel_hdr; | |
6306 | ||
6307 | howto = bfd_reloc_type_lookup (output_bfd, link_order->u.reloc.p->reloc); | |
6308 | if (howto == NULL) | |
6309 | { | |
6310 | bfd_set_error (bfd_error_bad_value); | |
6311 | return false; | |
6312 | } | |
6313 | ||
6314 | /* If this is an inplace reloc, we must write the addend into the | |
6315 | object file. */ | |
6316 | if (howto->partial_inplace | |
6317 | && link_order->u.reloc.p->addend != 0) | |
6318 | { | |
6319 | bfd_size_type size; | |
6320 | bfd_reloc_status_type rstat; | |
6321 | bfd_byte *buf; | |
6322 | boolean ok; | |
6323 | ||
6324 | size = bfd_get_reloc_size (howto); | |
6325 | buf = (bfd_byte *) bfd_zmalloc (size); | |
6326 | if (buf == (bfd_byte *) NULL) | |
6327 | { | |
6328 | bfd_set_error (bfd_error_no_memory); | |
6329 | return false; | |
6330 | } | |
6331 | rstat = _bfd_relocate_contents (howto, output_bfd, | |
6332 | link_order->u.reloc.p->addend, buf); | |
6333 | switch (rstat) | |
6334 | { | |
6335 | case bfd_reloc_ok: | |
6336 | break; | |
6337 | default: | |
6338 | case bfd_reloc_outofrange: | |
6339 | abort (); | |
6340 | case bfd_reloc_overflow: | |
6341 | if (! ((*info->callbacks->reloc_overflow) | |
6342 | (info, | |
6343 | (link_order->type == bfd_section_reloc_link_order | |
6344 | ? bfd_section_name (output_bfd, | |
6345 | link_order->u.reloc.p->u.section) | |
6346 | : link_order->u.reloc.p->u.name), | |
6347 | howto->name, link_order->u.reloc.p->addend, | |
6348 | (bfd *) NULL, (asection *) NULL, (bfd_vma) 0))) | |
6349 | { | |
6350 | free (buf); | |
6351 | return false; | |
6352 | } | |
6353 | break; | |
6354 | } | |
6355 | ok = bfd_set_section_contents (output_bfd, output_section, (PTR) buf, | |
6356 | (file_ptr) link_order->offset, size); | |
6357 | free (buf); | |
6358 | if (! ok) | |
6359 | return false; | |
6360 | } | |
6361 | ||
6362 | /* Figure out the symbol index. */ | |
6363 | rel_hash_ptr = (elf_section_data (output_section)->rel_hashes | |
6364 | + output_section->reloc_count); | |
6365 | if (link_order->type == bfd_section_reloc_link_order) | |
6366 | { | |
013dec1a ILT |
6367 | indx = link_order->u.reloc.p->u.section->target_index; |
6368 | if (indx == 0) | |
6369 | abort (); | |
6ec3bb6a ILT |
6370 | *rel_hash_ptr = NULL; |
6371 | } | |
6372 | else | |
6373 | { | |
6374 | struct elf_link_hash_entry *h; | |
6375 | ||
6376 | h = elf_link_hash_lookup (elf_hash_table (info), | |
6377 | link_order->u.reloc.p->u.name, | |
6378 | false, false, true); | |
6379 | if (h != NULL) | |
6380 | { | |
6381 | /* Setting the index to -2 tells elf_link_output_extsym that | |
6382 | this symbol is used by a reloc. */ | |
6383 | h->indx = -2; | |
6384 | *rel_hash_ptr = h; | |
6385 | indx = 0; | |
6386 | } | |
6387 | else | |
6388 | { | |
6389 | if (! ((*info->callbacks->unattached_reloc) | |
6390 | (info, link_order->u.reloc.p->u.name, (bfd *) NULL, | |
6391 | (asection *) NULL, (bfd_vma) 0))) | |
6392 | return false; | |
6393 | indx = 0; | |
6394 | } | |
6395 | } | |
6396 | ||
6397 | /* The address of a reloc is relative to the section in a | |
6398 | relocateable file, and is a virtual address in an executable | |
6399 | file. */ | |
6400 | offset = link_order->offset; | |
6401 | if (! info->relocateable) | |
6402 | offset += output_section->vma; | |
6403 | ||
6404 | rel_hdr = &elf_section_data (output_section)->rel_hdr; | |
6405 | ||
6406 | if (rel_hdr->sh_type == SHT_REL) | |
6407 | { | |
6408 | Elf_Internal_Rel irel; | |
6409 | Elf_External_Rel *erel; | |
6410 | ||
6411 | irel.r_offset = offset; | |
6412 | irel.r_info = ELF_R_INFO (indx, howto->type); | |
6413 | erel = ((Elf_External_Rel *) rel_hdr->contents | |
6414 | + output_section->reloc_count); | |
6415 | elf_swap_reloc_out (output_bfd, &irel, erel); | |
6416 | } | |
6417 | else | |
6418 | { | |
6419 | Elf_Internal_Rela irela; | |
6420 | Elf_External_Rela *erela; | |
6421 | ||
6422 | irela.r_offset = offset; | |
6423 | irela.r_info = ELF_R_INFO (indx, howto->type); | |
6424 | irela.r_addend = link_order->u.reloc.p->addend; | |
6425 | erela = ((Elf_External_Rela *) rel_hdr->contents | |
6426 | + output_section->reloc_count); | |
6427 | elf_swap_reloca_out (output_bfd, &irela, erela); | |
6428 | } | |
6429 | ||
6430 | ++output_section->reloc_count; | |
6431 | ||
6432 | return true; | |
6433 | } |