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244ffee7 | 1 | /* ELF executable support for BFD. |
b9d5cdf0 | 2 | Copyright 1991, 1992, 1993, 1994 Free Software Foundation, Inc. |
244ffee7 JK |
3 | |
4 | Written by Fred Fish @ Cygnus Support, from information published | |
5 | in "UNIX System V Release 4, Programmers Guide: ANSI C and | |
6 | Programming Support Tools". Sufficient support for gdb. | |
7 | ||
8 | Rewritten by Mark Eichin @ Cygnus Support, from information | |
9 | published in "System V Application Binary Interface", chapters 4 | |
10 | and 5, as well as the various "Processor Supplement" documents | |
11 | derived from it. Added support for assembler and other object file | |
12 | utilities. Further work done by Ken Raeburn (Cygnus Support), Michael | |
13 | Meissner (Open Software Foundation), and Peter Hoogenboom (University | |
14 | of Utah) to finish and extend this. | |
15 | ||
16 | This file is part of BFD, the Binary File Descriptor library. | |
17 | ||
18 | This program is free software; you can redistribute it and/or modify | |
19 | it under the terms of the GNU General Public License as published by | |
20 | the Free Software Foundation; either version 2 of the License, or | |
21 | (at your option) any later version. | |
22 | ||
23 | This program is distributed in the hope that it will be useful, | |
24 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
25 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
26 | GNU General Public License for more details. | |
27 | ||
28 | You should have received a copy of the GNU General Public License | |
29 | along with this program; if not, write to the Free Software | |
30 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
31 | ||
244ffee7 JK |
32 | /* Problems and other issues to resolve. |
33 | ||
34 | (1) BFD expects there to be some fixed number of "sections" in | |
35 | the object file. I.E. there is a "section_count" variable in the | |
36 | bfd structure which contains the number of sections. However, ELF | |
37 | supports multiple "views" of a file. In particular, with current | |
38 | implementations, executable files typically have two tables, a | |
39 | program header table and a section header table, both of which | |
40 | partition the executable. | |
41 | ||
42 | In ELF-speak, the "linking view" of the file uses the section header | |
43 | table to access "sections" within the file, and the "execution view" | |
44 | uses the program header table to access "segments" within the file. | |
45 | "Segments" typically may contain all the data from one or more | |
46 | "sections". | |
47 | ||
48 | Note that the section header table is optional in ELF executables, | |
49 | but it is this information that is most useful to gdb. If the | |
50 | section header table is missing, then gdb should probably try | |
51 | to make do with the program header table. (FIXME) | |
52 | ||
6a3eb9b6 KR |
53 | (2) The code in this file is compiled twice, once in 32-bit mode and |
54 | once in 64-bit mode. More of it should be made size-independent | |
55 | and moved into elf.c. | |
56 | ||
d24928c0 KR |
57 | (3) ELF section symbols are handled rather sloppily now. This should |
58 | be cleaned up, and ELF section symbols reconciled with BFD section | |
59 | symbols. | |
60 | */ | |
244ffee7 JK |
61 | |
62 | #include <string.h> /* For strrchr and friends */ | |
63 | #include "bfd.h" | |
64 | #include "sysdep.h" | |
6ec3bb6a | 65 | #include "bfdlink.h" |
244ffee7 JK |
66 | #include "libbfd.h" |
67 | #include "libelf.h" | |
68 | ||
32090b8e | 69 | /* Renaming structures, typedefs, macros and functions to be size-specific. */ |
244ffee7 | 70 | #define Elf_External_Ehdr NAME(Elf,External_Ehdr) |
244ffee7 | 71 | #define Elf_External_Sym NAME(Elf,External_Sym) |
244ffee7 | 72 | #define Elf_External_Shdr NAME(Elf,External_Shdr) |
244ffee7 | 73 | #define Elf_External_Phdr NAME(Elf,External_Phdr) |
244ffee7 JK |
74 | #define Elf_External_Rel NAME(Elf,External_Rel) |
75 | #define Elf_External_Rela NAME(Elf,External_Rela) | |
013dec1a | 76 | #define Elf_External_Dyn NAME(Elf,External_Dyn) |
244ffee7 | 77 | |
244ffee7 JK |
78 | #define elf_core_file_failing_command NAME(bfd_elf,core_file_failing_command) |
79 | #define elf_core_file_failing_signal NAME(bfd_elf,core_file_failing_signal) | |
cb71adf1 PS |
80 | #define elf_core_file_matches_executable_p \ |
81 | NAME(bfd_elf,core_file_matches_executable_p) | |
244ffee7 JK |
82 | #define elf_object_p NAME(bfd_elf,object_p) |
83 | #define elf_core_file_p NAME(bfd_elf,core_file_p) | |
244ffee7 | 84 | #define elf_get_symtab_upper_bound NAME(bfd_elf,get_symtab_upper_bound) |
cb71adf1 PS |
85 | #define elf_get_dynamic_symtab_upper_bound \ |
86 | NAME(bfd_elf,get_dynamic_symtab_upper_bound) | |
013dec1a ILT |
87 | #define elf_swap_reloc_in NAME(bfd_elf,swap_reloc_in) |
88 | #define elf_swap_reloca_in NAME(bfd_elf,swap_reloca_in) | |
89 | #define elf_swap_reloc_out NAME(bfd_elf,swap_reloc_out) | |
90 | #define elf_swap_reloca_out NAME(bfd_elf,swap_reloca_out) | |
91 | #define elf_swap_dyn_in NAME(bfd_elf,swap_dyn_in) | |
92 | #define elf_swap_dyn_out NAME(bfd_elf,swap_dyn_out) | |
244ffee7 JK |
93 | #define elf_get_reloc_upper_bound NAME(bfd_elf,get_reloc_upper_bound) |
94 | #define elf_canonicalize_reloc NAME(bfd_elf,canonicalize_reloc) | |
95 | #define elf_get_symtab NAME(bfd_elf,get_symtab) | |
cb71adf1 PS |
96 | #define elf_canonicalize_dynamic_symtab \ |
97 | NAME(bfd_elf,canonicalize_dynamic_symtab) | |
244ffee7 JK |
98 | #define elf_make_empty_symbol NAME(bfd_elf,make_empty_symbol) |
99 | #define elf_get_symbol_info NAME(bfd_elf,get_symbol_info) | |
100 | #define elf_print_symbol NAME(bfd_elf,print_symbol) | |
101 | #define elf_get_lineno NAME(bfd_elf,get_lineno) | |
102 | #define elf_set_arch_mach NAME(bfd_elf,set_arch_mach) | |
103 | #define elf_find_nearest_line NAME(bfd_elf,find_nearest_line) | |
104 | #define elf_sizeof_headers NAME(bfd_elf,sizeof_headers) | |
105 | #define elf_set_section_contents NAME(bfd_elf,set_section_contents) | |
106 | #define elf_no_info_to_howto NAME(bfd_elf,no_info_to_howto) | |
107 | #define elf_no_info_to_howto_rel NAME(bfd_elf,no_info_to_howto_rel) | |
fce36137 | 108 | #define elf_new_section_hook NAME(bfd_elf,new_section_hook) |
32090b8e | 109 | #define write_relocs NAME(bfd_elf,_write_relocs) |
f035cc47 | 110 | #define elf_find_section NAME(bfd_elf,find_section) |
6ec3bb6a | 111 | #define elf_bfd_link_add_symbols NAME(bfd_elf,bfd_link_add_symbols) |
013dec1a | 112 | #define elf_add_dynamic_entry NAME(bfd_elf,add_dynamic_entry) |
6ec3bb6a | 113 | #define elf_bfd_final_link NAME(bfd_elf,bfd_final_link) |
244ffee7 | 114 | |
6a3eb9b6 KR |
115 | #if ARCH_SIZE == 64 |
116 | #define ELF_R_INFO(X,Y) ELF64_R_INFO(X,Y) | |
117 | #define ELF_R_SYM(X) ELF64_R_SYM(X) | |
6ec3bb6a | 118 | #define ELF_R_TYPE(X) ELF64_R_TYPE(X) |
32090b8e | 119 | #define ELFCLASS ELFCLASS64 |
f035cc47 | 120 | #define FILE_ALIGN 8 |
013dec1a | 121 | #define LOG_FILE_ALIGN 3 |
6a3eb9b6 KR |
122 | #endif |
123 | #if ARCH_SIZE == 32 | |
124 | #define ELF_R_INFO(X,Y) ELF32_R_INFO(X,Y) | |
125 | #define ELF_R_SYM(X) ELF32_R_SYM(X) | |
6ec3bb6a | 126 | #define ELF_R_TYPE(X) ELF32_R_TYPE(X) |
32090b8e | 127 | #define ELFCLASS ELFCLASS32 |
f035cc47 | 128 | #define FILE_ALIGN 4 |
013dec1a | 129 | #define LOG_FILE_ALIGN 2 |
244ffee7 JK |
130 | #endif |
131 | ||
244ffee7 JK |
132 | /* Forward declarations of static functions */ |
133 | ||
6ec3bb6a ILT |
134 | static unsigned long bfd_add_to_strtab |
135 | PARAMS ((bfd *, struct strtab *, const char *)); | |
2e03ce18 | 136 | static asection *section_from_elf_index PARAMS ((bfd *, unsigned int)); |
244ffee7 JK |
137 | |
138 | static int elf_section_from_bfd_section PARAMS ((bfd *, struct sec *)); | |
139 | ||
cb71adf1 | 140 | static long elf_slurp_symbol_table PARAMS ((bfd *, asymbol **, boolean)); |
244ffee7 | 141 | |
244ffee7 | 142 | static int elf_symbol_from_bfd_symbol PARAMS ((bfd *, |
1c6042ee | 143 | struct symbol_cache_entry **)); |
244ffee7 | 144 | |
6ec3bb6a ILT |
145 | static boolean elf_compute_section_file_positions |
146 | PARAMS ((bfd *, struct bfd_link_info *)); | |
147 | static boolean prep_headers PARAMS ((bfd *)); | |
148 | static boolean assign_section_numbers PARAMS ((bfd *)); | |
013dec1a ILT |
149 | static file_ptr align_file_position PARAMS ((file_ptr)); |
150 | static file_ptr assign_file_position_for_section | |
151 | PARAMS ((Elf_Internal_Shdr *, file_ptr, boolean)); | |
6ec3bb6a | 152 | static boolean assign_file_positions_except_relocs PARAMS ((bfd *, boolean)); |
013dec1a ILT |
153 | static void assign_file_positions_for_relocs PARAMS ((bfd *)); |
154 | static bfd_size_type get_program_header_size PARAMS ((bfd *)); | |
155 | static file_ptr map_program_segments | |
156 | PARAMS ((bfd *, file_ptr, Elf_Internal_Shdr *, bfd_size_type)); | |
6ec3bb6a | 157 | |
9783e04a | 158 | static boolean elf_map_symbols PARAMS ((bfd *)); |
b9d5cdf0 | 159 | static boolean swap_out_syms PARAMS ((bfd *)); |
244ffee7 | 160 | |
2e03ce18 ILT |
161 | static boolean bfd_section_from_shdr PARAMS ((bfd *, unsigned int shindex)); |
162 | ||
6a3eb9b6 KR |
163 | #ifdef DEBUG |
164 | static void elf_debug_section PARAMS ((char *, int, Elf_Internal_Shdr *)); | |
165 | static void elf_debug_file PARAMS ((Elf_Internal_Ehdr *)); | |
166 | #endif | |
238ac6ec | 167 | |
32090b8e KR |
168 | #define elf_string_from_elf_strtab(abfd,strindex) \ |
169 | elf_string_from_elf_section(abfd,elf_elfheader(abfd)->e_shstrndx,strindex) | |
32090b8e | 170 | \f |
1c6042ee | 171 | |
32090b8e KR |
172 | /* Structure swapping routines */ |
173 | ||
6a3eb9b6 KR |
174 | /* Should perhaps use put_offset, put_word, etc. For now, the two versions |
175 | can be handled by explicitly specifying 32 bits or "the long type". */ | |
238ac6ec KR |
176 | #if ARCH_SIZE == 64 |
177 | #define put_word bfd_h_put_64 | |
178 | #define get_word bfd_h_get_64 | |
179 | #endif | |
180 | #if ARCH_SIZE == 32 | |
181 | #define put_word bfd_h_put_32 | |
182 | #define get_word bfd_h_get_32 | |
183 | #endif | |
184 | ||
244ffee7 JK |
185 | /* Translate an ELF symbol in external format into an ELF symbol in internal |
186 | format. */ | |
187 | ||
188 | static void | |
1c6042ee ILT |
189 | elf_swap_symbol_in (abfd, src, dst) |
190 | bfd *abfd; | |
191 | Elf_External_Sym *src; | |
192 | Elf_Internal_Sym *dst; | |
244ffee7 JK |
193 | { |
194 | dst->st_name = bfd_h_get_32 (abfd, (bfd_byte *) src->st_name); | |
238ac6ec KR |
195 | dst->st_value = get_word (abfd, (bfd_byte *) src->st_value); |
196 | dst->st_size = get_word (abfd, (bfd_byte *) src->st_size); | |
244ffee7 JK |
197 | dst->st_info = bfd_h_get_8 (abfd, (bfd_byte *) src->st_info); |
198 | dst->st_other = bfd_h_get_8 (abfd, (bfd_byte *) src->st_other); | |
199 | dst->st_shndx = bfd_h_get_16 (abfd, (bfd_byte *) src->st_shndx); | |
200 | } | |
201 | ||
202 | /* Translate an ELF symbol in internal format into an ELF symbol in external | |
203 | format. */ | |
204 | ||
205 | static void | |
1c6042ee ILT |
206 | elf_swap_symbol_out (abfd, src, dst) |
207 | bfd *abfd; | |
208 | Elf_Internal_Sym *src; | |
209 | Elf_External_Sym *dst; | |
244ffee7 JK |
210 | { |
211 | bfd_h_put_32 (abfd, src->st_name, dst->st_name); | |
238ac6ec KR |
212 | put_word (abfd, src->st_value, dst->st_value); |
213 | put_word (abfd, src->st_size, dst->st_size); | |
244ffee7 JK |
214 | bfd_h_put_8 (abfd, src->st_info, dst->st_info); |
215 | bfd_h_put_8 (abfd, src->st_other, dst->st_other); | |
216 | bfd_h_put_16 (abfd, src->st_shndx, dst->st_shndx); | |
217 | } | |
218 | ||
219 | ||
220 | /* Translate an ELF file header in external format into an ELF file header in | |
221 | internal format. */ | |
222 | ||
223 | static void | |
1c6042ee ILT |
224 | elf_swap_ehdr_in (abfd, src, dst) |
225 | bfd *abfd; | |
226 | Elf_External_Ehdr *src; | |
227 | Elf_Internal_Ehdr *dst; | |
244ffee7 JK |
228 | { |
229 | memcpy (dst->e_ident, src->e_ident, EI_NIDENT); | |
230 | dst->e_type = bfd_h_get_16 (abfd, (bfd_byte *) src->e_type); | |
231 | dst->e_machine = bfd_h_get_16 (abfd, (bfd_byte *) src->e_machine); | |
232 | dst->e_version = bfd_h_get_32 (abfd, (bfd_byte *) src->e_version); | |
238ac6ec KR |
233 | dst->e_entry = get_word (abfd, (bfd_byte *) src->e_entry); |
234 | dst->e_phoff = get_word (abfd, (bfd_byte *) src->e_phoff); | |
235 | dst->e_shoff = get_word (abfd, (bfd_byte *) src->e_shoff); | |
244ffee7 JK |
236 | dst->e_flags = bfd_h_get_32 (abfd, (bfd_byte *) src->e_flags); |
237 | dst->e_ehsize = bfd_h_get_16 (abfd, (bfd_byte *) src->e_ehsize); | |
238 | dst->e_phentsize = bfd_h_get_16 (abfd, (bfd_byte *) src->e_phentsize); | |
239 | dst->e_phnum = bfd_h_get_16 (abfd, (bfd_byte *) src->e_phnum); | |
240 | dst->e_shentsize = bfd_h_get_16 (abfd, (bfd_byte *) src->e_shentsize); | |
241 | dst->e_shnum = bfd_h_get_16 (abfd, (bfd_byte *) src->e_shnum); | |
242 | dst->e_shstrndx = bfd_h_get_16 (abfd, (bfd_byte *) src->e_shstrndx); | |
243 | } | |
244 | ||
245 | /* Translate an ELF file header in internal format into an ELF file header in | |
246 | external format. */ | |
247 | ||
248 | static void | |
1c6042ee ILT |
249 | elf_swap_ehdr_out (abfd, src, dst) |
250 | bfd *abfd; | |
251 | Elf_Internal_Ehdr *src; | |
252 | Elf_External_Ehdr *dst; | |
244ffee7 JK |
253 | { |
254 | memcpy (dst->e_ident, src->e_ident, EI_NIDENT); | |
255 | /* note that all elements of dst are *arrays of unsigned char* already... */ | |
256 | bfd_h_put_16 (abfd, src->e_type, dst->e_type); | |
257 | bfd_h_put_16 (abfd, src->e_machine, dst->e_machine); | |
258 | bfd_h_put_32 (abfd, src->e_version, dst->e_version); | |
238ac6ec KR |
259 | put_word (abfd, src->e_entry, dst->e_entry); |
260 | put_word (abfd, src->e_phoff, dst->e_phoff); | |
261 | put_word (abfd, src->e_shoff, dst->e_shoff); | |
244ffee7 JK |
262 | bfd_h_put_32 (abfd, src->e_flags, dst->e_flags); |
263 | bfd_h_put_16 (abfd, src->e_ehsize, dst->e_ehsize); | |
264 | bfd_h_put_16 (abfd, src->e_phentsize, dst->e_phentsize); | |
265 | bfd_h_put_16 (abfd, src->e_phnum, dst->e_phnum); | |
266 | bfd_h_put_16 (abfd, src->e_shentsize, dst->e_shentsize); | |
267 | bfd_h_put_16 (abfd, src->e_shnum, dst->e_shnum); | |
268 | bfd_h_put_16 (abfd, src->e_shstrndx, dst->e_shstrndx); | |
269 | } | |
270 | ||
271 | ||
272 | /* Translate an ELF section header table entry in external format into an | |
273 | ELF section header table entry in internal format. */ | |
274 | ||
275 | static void | |
1c6042ee ILT |
276 | elf_swap_shdr_in (abfd, src, dst) |
277 | bfd *abfd; | |
278 | Elf_External_Shdr *src; | |
279 | Elf_Internal_Shdr *dst; | |
244ffee7 JK |
280 | { |
281 | dst->sh_name = bfd_h_get_32 (abfd, (bfd_byte *) src->sh_name); | |
282 | dst->sh_type = bfd_h_get_32 (abfd, (bfd_byte *) src->sh_type); | |
238ac6ec KR |
283 | dst->sh_flags = get_word (abfd, (bfd_byte *) src->sh_flags); |
284 | dst->sh_addr = get_word (abfd, (bfd_byte *) src->sh_addr); | |
285 | dst->sh_offset = get_word (abfd, (bfd_byte *) src->sh_offset); | |
286 | dst->sh_size = get_word (abfd, (bfd_byte *) src->sh_size); | |
244ffee7 JK |
287 | dst->sh_link = bfd_h_get_32 (abfd, (bfd_byte *) src->sh_link); |
288 | dst->sh_info = bfd_h_get_32 (abfd, (bfd_byte *) src->sh_info); | |
238ac6ec KR |
289 | dst->sh_addralign = get_word (abfd, (bfd_byte *) src->sh_addralign); |
290 | dst->sh_entsize = get_word (abfd, (bfd_byte *) src->sh_entsize); | |
244ffee7 JK |
291 | /* we haven't done any processing on it yet, so... */ |
292 | dst->rawdata = (void *) 0; | |
293 | } | |
294 | ||
295 | /* Translate an ELF section header table entry in internal format into an | |
296 | ELF section header table entry in external format. */ | |
297 | ||
298 | static void | |
1c6042ee ILT |
299 | elf_swap_shdr_out (abfd, src, dst) |
300 | bfd *abfd; | |
301 | Elf_Internal_Shdr *src; | |
302 | Elf_External_Shdr *dst; | |
244ffee7 JK |
303 | { |
304 | /* note that all elements of dst are *arrays of unsigned char* already... */ | |
305 | bfd_h_put_32 (abfd, src->sh_name, dst->sh_name); | |
306 | bfd_h_put_32 (abfd, src->sh_type, dst->sh_type); | |
238ac6ec KR |
307 | put_word (abfd, src->sh_flags, dst->sh_flags); |
308 | put_word (abfd, src->sh_addr, dst->sh_addr); | |
309 | put_word (abfd, src->sh_offset, dst->sh_offset); | |
310 | put_word (abfd, src->sh_size, dst->sh_size); | |
244ffee7 JK |
311 | bfd_h_put_32 (abfd, src->sh_link, dst->sh_link); |
312 | bfd_h_put_32 (abfd, src->sh_info, dst->sh_info); | |
238ac6ec KR |
313 | put_word (abfd, src->sh_addralign, dst->sh_addralign); |
314 | put_word (abfd, src->sh_entsize, dst->sh_entsize); | |
244ffee7 JK |
315 | } |
316 | ||
317 | ||
318 | /* Translate an ELF program header table entry in external format into an | |
319 | ELF program header table entry in internal format. */ | |
320 | ||
321 | static void | |
1c6042ee ILT |
322 | elf_swap_phdr_in (abfd, src, dst) |
323 | bfd *abfd; | |
324 | Elf_External_Phdr *src; | |
325 | Elf_Internal_Phdr *dst; | |
244ffee7 JK |
326 | { |
327 | dst->p_type = bfd_h_get_32 (abfd, (bfd_byte *) src->p_type); | |
244ffee7 | 328 | dst->p_flags = bfd_h_get_32 (abfd, (bfd_byte *) src->p_flags); |
238ac6ec KR |
329 | dst->p_offset = get_word (abfd, (bfd_byte *) src->p_offset); |
330 | dst->p_vaddr = get_word (abfd, (bfd_byte *) src->p_vaddr); | |
331 | dst->p_paddr = get_word (abfd, (bfd_byte *) src->p_paddr); | |
332 | dst->p_filesz = get_word (abfd, (bfd_byte *) src->p_filesz); | |
333 | dst->p_memsz = get_word (abfd, (bfd_byte *) src->p_memsz); | |
334 | dst->p_align = get_word (abfd, (bfd_byte *) src->p_align); | |
244ffee7 JK |
335 | } |
336 | ||
244ffee7 | 337 | static void |
1c6042ee ILT |
338 | elf_swap_phdr_out (abfd, src, dst) |
339 | bfd *abfd; | |
340 | Elf_Internal_Phdr *src; | |
341 | Elf_External_Phdr *dst; | |
244ffee7 JK |
342 | { |
343 | /* note that all elements of dst are *arrays of unsigned char* already... */ | |
344 | bfd_h_put_32 (abfd, src->p_type, dst->p_type); | |
94dbb655 KR |
345 | put_word (abfd, src->p_offset, dst->p_offset); |
346 | put_word (abfd, src->p_vaddr, dst->p_vaddr); | |
347 | put_word (abfd, src->p_paddr, dst->p_paddr); | |
348 | put_word (abfd, src->p_filesz, dst->p_filesz); | |
349 | put_word (abfd, src->p_memsz, dst->p_memsz); | |
244ffee7 | 350 | bfd_h_put_32 (abfd, src->p_flags, dst->p_flags); |
94dbb655 | 351 | put_word (abfd, src->p_align, dst->p_align); |
244ffee7 JK |
352 | } |
353 | ||
354 | /* Translate an ELF reloc from external format to internal format. */ | |
013dec1a | 355 | INLINE void |
1c6042ee ILT |
356 | elf_swap_reloc_in (abfd, src, dst) |
357 | bfd *abfd; | |
358 | Elf_External_Rel *src; | |
359 | Elf_Internal_Rel *dst; | |
244ffee7 | 360 | { |
94dbb655 KR |
361 | dst->r_offset = get_word (abfd, (bfd_byte *) src->r_offset); |
362 | dst->r_info = get_word (abfd, (bfd_byte *) src->r_info); | |
244ffee7 JK |
363 | } |
364 | ||
013dec1a | 365 | INLINE void |
1c6042ee ILT |
366 | elf_swap_reloca_in (abfd, src, dst) |
367 | bfd *abfd; | |
368 | Elf_External_Rela *src; | |
369 | Elf_Internal_Rela *dst; | |
244ffee7 | 370 | { |
94dbb655 KR |
371 | dst->r_offset = get_word (abfd, (bfd_byte *) src->r_offset); |
372 | dst->r_info = get_word (abfd, (bfd_byte *) src->r_info); | |
373 | dst->r_addend = get_word (abfd, (bfd_byte *) src->r_addend); | |
244ffee7 JK |
374 | } |
375 | ||
376 | /* Translate an ELF reloc from internal format to external format. */ | |
013dec1a | 377 | INLINE void |
1c6042ee ILT |
378 | elf_swap_reloc_out (abfd, src, dst) |
379 | bfd *abfd; | |
380 | Elf_Internal_Rel *src; | |
381 | Elf_External_Rel *dst; | |
244ffee7 | 382 | { |
94dbb655 KR |
383 | put_word (abfd, src->r_offset, dst->r_offset); |
384 | put_word (abfd, src->r_info, dst->r_info); | |
244ffee7 JK |
385 | } |
386 | ||
013dec1a | 387 | INLINE void |
1c6042ee ILT |
388 | elf_swap_reloca_out (abfd, src, dst) |
389 | bfd *abfd; | |
390 | Elf_Internal_Rela *src; | |
391 | Elf_External_Rela *dst; | |
244ffee7 | 392 | { |
94dbb655 KR |
393 | put_word (abfd, src->r_offset, dst->r_offset); |
394 | put_word (abfd, src->r_info, dst->r_info); | |
395 | put_word (abfd, src->r_addend, dst->r_addend); | |
244ffee7 | 396 | } |
32090b8e | 397 | |
013dec1a ILT |
398 | INLINE void |
399 | elf_swap_dyn_in (abfd, src, dst) | |
400 | bfd *abfd; | |
401 | const Elf_External_Dyn *src; | |
402 | Elf_Internal_Dyn *dst; | |
403 | { | |
404 | dst->d_tag = get_word (abfd, src->d_tag); | |
405 | dst->d_un.d_val = get_word (abfd, src->d_un.d_val); | |
406 | } | |
1c6042ee | 407 | |
013dec1a ILT |
408 | INLINE void |
409 | elf_swap_dyn_out (abfd, src, dst) | |
410 | bfd *abfd; | |
411 | const Elf_Internal_Dyn *src; | |
412 | Elf_External_Dyn *dst; | |
413 | { | |
414 | put_word (abfd, src->d_tag, dst->d_tag); | |
415 | put_word (abfd, src->d_un.d_val, dst->d_un.d_val); | |
416 | } | |
417 | \f | |
32090b8e KR |
418 | /* String table creation/manipulation routines */ |
419 | ||
420 | static struct strtab * | |
1c6042ee ILT |
421 | bfd_new_strtab (abfd) |
422 | bfd *abfd; | |
32090b8e KR |
423 | { |
424 | struct strtab *ss; | |
425 | ||
b9d5cdf0 DM |
426 | ss = (struct strtab *) malloc (sizeof (struct strtab)); |
427 | if (!ss) | |
428 | { | |
d1ad85a6 | 429 | bfd_set_error (bfd_error_no_memory); |
b9d5cdf0 DM |
430 | return NULL; |
431 | } | |
432 | ss->tab = malloc (1); | |
433 | if (!ss->tab) | |
434 | { | |
d1ad85a6 | 435 | bfd_set_error (bfd_error_no_memory); |
b9d5cdf0 DM |
436 | return NULL; |
437 | } | |
32090b8e KR |
438 | *ss->tab = 0; |
439 | ss->nentries = 0; | |
440 | ss->length = 1; | |
244ffee7 | 441 | |
32090b8e KR |
442 | return ss; |
443 | } | |
444 | ||
6ec3bb6a | 445 | static unsigned long |
1c6042ee ILT |
446 | bfd_add_to_strtab (abfd, ss, str) |
447 | bfd *abfd; | |
448 | struct strtab *ss; | |
6ec3bb6a | 449 | const char *str; |
32090b8e KR |
450 | { |
451 | /* should search first, but for now: */ | |
452 | /* include the trailing NUL */ | |
453 | int ln = strlen (str) + 1; | |
454 | ||
6ec3bb6a ILT |
455 | /* FIXME: This is slow. Also, we could combine this with the a.out |
456 | string table building and use a hash table, although it might not | |
457 | be worth it since ELF symbols don't include debugging information | |
458 | and thus have much less overlap. */ | |
32090b8e | 459 | ss->tab = realloc (ss->tab, ss->length + ln); |
6ec3bb6a ILT |
460 | if (ss->tab == NULL) |
461 | { | |
462 | bfd_set_error (bfd_error_no_memory); | |
463 | return (unsigned long) -1; | |
464 | } | |
32090b8e | 465 | |
32090b8e KR |
466 | strcpy (ss->tab + ss->length, str); |
467 | ss->nentries++; | |
468 | ss->length += ln; | |
469 | ||
470 | return ss->length - ln; | |
471 | } | |
472 | ||
473 | static int | |
1c6042ee ILT |
474 | bfd_add_2_to_strtab (abfd, ss, str, str2) |
475 | bfd *abfd; | |
476 | struct strtab *ss; | |
477 | char *str; | |
478 | CONST char *str2; | |
244ffee7 | 479 | { |
32090b8e KR |
480 | /* should search first, but for now: */ |
481 | /* include the trailing NUL */ | |
482 | int ln = strlen (str) + strlen (str2) + 1; | |
483 | ||
484 | /* should this be using obstacks? */ | |
485 | if (ss->length) | |
486 | ss->tab = realloc (ss->tab, ss->length + ln); | |
487 | else | |
b9d5cdf0 | 488 | ss->tab = malloc (ln); |
32090b8e | 489 | |
9783e04a | 490 | BFD_ASSERT (ss->tab != 0); /* FIXME */ |
32090b8e KR |
491 | strcpy (ss->tab + ss->length, str); |
492 | strcpy (ss->tab + ss->length + strlen (str), str2); | |
493 | ss->nentries++; | |
494 | ss->length += ln; | |
495 | ||
496 | return ss->length - ln; | |
244ffee7 | 497 | } |
32090b8e | 498 | \f |
1c6042ee | 499 | |
32090b8e KR |
500 | /* ELF .o/exec file reading */ |
501 | ||
502 | /* Create a new bfd section from an ELF section header. */ | |
503 | ||
244ffee7 | 504 | static boolean |
1c6042ee ILT |
505 | bfd_section_from_shdr (abfd, shindex) |
506 | bfd *abfd; | |
507 | unsigned int shindex; | |
244ffee7 | 508 | { |
32090b8e KR |
509 | Elf_Internal_Shdr *hdr = elf_elfsections (abfd)[shindex]; |
510 | Elf_Internal_Ehdr *ehdr = elf_elfheader (abfd); | |
244ffee7 JK |
511 | asection *newsect; |
512 | char *name; | |
513 | ||
514 | name = elf_string_from_elf_strtab (abfd, hdr->sh_name); | |
515 | ||
516 | switch (hdr->sh_type) | |
517 | { | |
518 | ||
519 | case SHT_NULL: | |
520 | /* inactive section. Throw it away. */ | |
521 | return true; | |
522 | ||
523 | case SHT_PROGBITS: | |
25677b5b | 524 | case SHT_DYNAMIC: |
244ffee7 | 525 | /* Bits that get saved. This one is real. */ |
2e03ce18 | 526 | if (hdr->rawdata == NULL) |
244ffee7 | 527 | { |
2e03ce18 ILT |
528 | newsect = bfd_make_section_anyway (abfd, name); |
529 | if (newsect == NULL) | |
530 | return false; | |
244ffee7 | 531 | |
2e03ce18 ILT |
532 | newsect->filepos = hdr->sh_offset; |
533 | newsect->flags |= SEC_HAS_CONTENTS; | |
534 | newsect->vma = hdr->sh_addr; | |
535 | newsect->_raw_size = hdr->sh_size; | |
536 | newsect->alignment_power = bfd_log2 (hdr->sh_addralign); | |
244ffee7 | 537 | |
2e03ce18 ILT |
538 | if (hdr->sh_flags & SHF_ALLOC) |
539 | { | |
540 | newsect->flags |= SEC_ALLOC; | |
541 | newsect->flags |= SEC_LOAD; | |
542 | } | |
244ffee7 | 543 | |
2e03ce18 ILT |
544 | if (!(hdr->sh_flags & SHF_WRITE)) |
545 | newsect->flags |= SEC_READONLY; | |
244ffee7 | 546 | |
2e03ce18 ILT |
547 | if (hdr->sh_flags & SHF_EXECINSTR) |
548 | newsect->flags |= SEC_CODE; /* FIXME: may only contain SOME code */ | |
549 | else if (newsect->flags & SEC_ALLOC) | |
550 | newsect->flags |= SEC_DATA; | |
d6e5f950 | 551 | |
2e03ce18 ILT |
552 | /* The debugging sections appear to recognized only by name, |
553 | not any sort of flag. */ | |
554 | if (strncmp (name, ".debug", sizeof ".debug" - 1) == 0 | |
555 | || strncmp (name, ".line", sizeof ".line" - 1) == 0 | |
556 | || strncmp (name, ".stab", sizeof ".stab" - 1) == 0) | |
557 | newsect->flags |= SEC_DEBUGGING; | |
558 | ||
559 | hdr->rawdata = (PTR) newsect; | |
244ffee7 JK |
560 | } |
561 | return true; | |
562 | ||
563 | case SHT_NOBITS: | |
564 | /* Bits that get saved. This one is real. */ | |
2e03ce18 | 565 | if (hdr->rawdata == NULL) |
244ffee7 | 566 | { |
2e03ce18 ILT |
567 | newsect = bfd_make_section_anyway (abfd, name); |
568 | if (newsect == NULL) | |
569 | return false; | |
570 | ||
571 | newsect->vma = hdr->sh_addr; | |
572 | newsect->_raw_size = hdr->sh_size; | |
573 | newsect->filepos = hdr->sh_offset; /* fake */ | |
574 | newsect->alignment_power = bfd_log2 (hdr->sh_addralign); | |
575 | if (hdr->sh_flags & SHF_ALLOC) | |
576 | newsect->flags |= SEC_ALLOC; | |
577 | ||
578 | if (!(hdr->sh_flags & SHF_WRITE)) | |
579 | newsect->flags |= SEC_READONLY; | |
580 | ||
581 | /* FIXME: This section is empty. Does it really make sense | |
582 | to set SEC_CODE for it? */ | |
583 | if (hdr->sh_flags & SHF_EXECINSTR) | |
584 | newsect->flags |= SEC_CODE; /* FIXME: may only contain SOME code */ | |
585 | ||
586 | hdr->rawdata = (PTR) newsect; | |
244ffee7 JK |
587 | } |
588 | return true; | |
589 | ||
590 | case SHT_SYMTAB: /* A symbol table */ | |
32090b8e KR |
591 | if (elf_onesymtab (abfd) == shindex) |
592 | return true; | |
593 | ||
244ffee7 | 594 | BFD_ASSERT (hdr->sh_entsize == sizeof (Elf_External_Sym)); |
32090b8e | 595 | BFD_ASSERT (elf_onesymtab (abfd) == 0); |
244ffee7 | 596 | elf_onesymtab (abfd) = shindex; |
1c6042ee ILT |
597 | elf_tdata (abfd)->symtab_hdr = *hdr; |
598 | elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->symtab_hdr; | |
244ffee7 JK |
599 | abfd->flags |= HAS_SYMS; |
600 | return true; | |
601 | ||
cb71adf1 PS |
602 | case SHT_DYNSYM: /* A dynamic symbol table */ |
603 | if (elf_dynsymtab (abfd) == shindex) | |
604 | return true; | |
605 | ||
606 | BFD_ASSERT (hdr->sh_entsize == sizeof (Elf_External_Sym)); | |
607 | BFD_ASSERT (elf_dynsymtab (abfd) == 0); | |
608 | elf_dynsymtab (abfd) = shindex; | |
609 | elf_tdata (abfd)->dynsymtab_hdr = *hdr; | |
610 | elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->dynsymtab_hdr; | |
611 | abfd->flags |= HAS_SYMS; | |
612 | return true; | |
613 | ||
244ffee7 | 614 | case SHT_STRTAB: /* A string table */ |
32090b8e | 615 | if (hdr->rawdata) |
fce36137 | 616 | return true; |
32090b8e KR |
617 | if (ehdr->e_shstrndx == shindex) |
618 | { | |
1c6042ee ILT |
619 | elf_tdata (abfd)->shstrtab_hdr = *hdr; |
620 | elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->shstrtab_hdr; | |
621 | hdr->rawdata = (PTR) & elf_tdata (abfd)->shstrtab_hdr; | |
32090b8e KR |
622 | return true; |
623 | } | |
624 | { | |
68241b2b | 625 | unsigned int i; |
fce36137 | 626 | |
32090b8e KR |
627 | for (i = 1; i < ehdr->e_shnum; i++) |
628 | { | |
1c6042ee | 629 | Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i]; |
32090b8e KR |
630 | if (hdr2->sh_link == shindex) |
631 | { | |
2e03ce18 ILT |
632 | if (! bfd_section_from_shdr (abfd, i)) |
633 | return false; | |
32090b8e KR |
634 | if (elf_onesymtab (abfd) == i) |
635 | { | |
1c6042ee ILT |
636 | elf_tdata (abfd)->strtab_hdr = *hdr; |
637 | elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->strtab_hdr; | |
32090b8e KR |
638 | return true; |
639 | } | |
cb71adf1 PS |
640 | if (elf_dynsymtab (abfd) == i) |
641 | { | |
642 | elf_tdata (abfd)->dynstrtab_hdr = *hdr; | |
643 | elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->dynstrtab_hdr; | |
644 | return true; | |
645 | } | |
2e03ce18 | 646 | #if 0 /* Not handling other string tables specially right now. */ |
1c6042ee | 647 | hdr2 = elf_elfsections (abfd)[i]; /* in case it moved */ |
32090b8e KR |
648 | /* We have a strtab for some random other section. */ |
649 | newsect = (asection *) hdr2->rawdata; | |
650 | if (!newsect) | |
651 | break; | |
652 | hdr->rawdata = (PTR) newsect; | |
653 | hdr2 = &elf_section_data (newsect)->str_hdr; | |
654 | *hdr2 = *hdr; | |
1c6042ee | 655 | elf_elfsections (abfd)[shindex] = hdr2; |
32090b8e KR |
656 | #endif |
657 | } | |
658 | } | |
659 | } | |
660 | ||
2e03ce18 ILT |
661 | newsect = bfd_make_section_anyway (abfd, name); |
662 | if (newsect == NULL) | |
663 | return false; | |
32090b8e | 664 | |
2e03ce18 ILT |
665 | newsect->flags = SEC_HAS_CONTENTS; |
666 | hdr->rawdata = (PTR) newsect; | |
667 | newsect->_raw_size = hdr->sh_size; | |
668 | newsect->alignment_power = bfd_log2 (hdr->sh_addralign); | |
669 | newsect->vma = hdr->sh_addr; | |
670 | newsect->filepos = hdr->sh_offset; | |
01383fb4 | 671 | |
2e03ce18 ILT |
672 | if (hdr->sh_flags & SHF_ALLOC) |
673 | newsect->flags |= SEC_ALLOC | SEC_LOAD; | |
674 | if (!(hdr->sh_flags & SHF_WRITE)) | |
675 | newsect->flags |= SEC_READONLY; | |
676 | if (hdr->sh_flags & SHF_EXECINSTR) | |
677 | newsect->flags |= SEC_CODE; | |
678 | else if (newsect->flags & SEC_ALLOC) | |
679 | newsect->flags |= SEC_DATA; | |
680 | ||
681 | /* Check for debugging string tables. */ | |
682 | if (strncmp (name, ".debug", sizeof ".debug" - 1) == 0 | |
683 | || strncmp (name, ".stab", sizeof ".stab" - 1) == 0) | |
684 | newsect->flags |= SEC_DEBUGGING; | |
fce36137 | 685 | |
244ffee7 JK |
686 | return true; |
687 | ||
688 | case SHT_REL: | |
689 | case SHT_RELA: | |
32090b8e KR |
690 | /* *These* do a lot of work -- but build no sections! |
691 | The spec says there can be multiple strtabs, but only one symtab, | |
692 | but there can be lots of REL* sections. */ | |
244ffee7 | 693 | /* FIXME: The above statement is wrong! There are typically at least |
32090b8e KR |
694 | two symbol tables in a dynamically linked executable, ".dynsym" |
695 | which is the dynamic linkage symbol table and ".symtab", which is | |
696 | the "traditional" symbol table. -fnf */ | |
244ffee7 JK |
697 | |
698 | { | |
699 | asection *target_sect; | |
32090b8e | 700 | Elf_Internal_Shdr *hdr2; |
244ffee7 JK |
701 | int use_rela_p = get_elf_backend_data (abfd)->use_rela_p; |
702 | ||
703 | /* Don't allow REL relocations on a machine that uses RELA and | |
704 | vice versa. */ | |
705 | /* @@ Actually, the generic ABI does suggest that both might be | |
706 | used in one file. But the four ABI Processor Supplements I | |
707 | have access to right now all specify that only one is used on | |
708 | each of those architectures. It's conceivable that, e.g., a | |
709 | bunch of absolute 32-bit relocs might be more compact in REL | |
710 | form even on a RELA machine... */ | |
711 | BFD_ASSERT (!(use_rela_p && (hdr->sh_type == SHT_REL))); | |
712 | BFD_ASSERT (!(!use_rela_p && (hdr->sh_type == SHT_RELA))); | |
713 | BFD_ASSERT (hdr->sh_entsize == | |
714 | (use_rela_p | |
6a3eb9b6 KR |
715 | ? sizeof (Elf_External_Rela) |
716 | : sizeof (Elf_External_Rel))); | |
244ffee7 | 717 | |
2e03ce18 ILT |
718 | if (! bfd_section_from_shdr (abfd, hdr->sh_info) /* target */ |
719 | || ! bfd_section_from_shdr (abfd, hdr->sh_link)) /* symbol table */ | |
720 | return false; | |
244ffee7 | 721 | target_sect = section_from_elf_index (abfd, hdr->sh_info); |
062189c6 ILT |
722 | if (target_sect == NULL |
723 | || elf_section_data (target_sect) == NULL) | |
244ffee7 JK |
724 | return false; |
725 | ||
32090b8e KR |
726 | hdr2 = &elf_section_data (target_sect)->rel_hdr; |
727 | *hdr2 = *hdr; | |
1c6042ee | 728 | elf_elfsections (abfd)[shindex] = hdr2; |
244ffee7 JK |
729 | target_sect->reloc_count = hdr->sh_size / hdr->sh_entsize; |
730 | target_sect->flags |= SEC_RELOC; | |
731 | target_sect->relocation = 0; | |
732 | target_sect->rel_filepos = hdr->sh_offset; | |
32090b8e | 733 | abfd->flags |= HAS_RELOC; |
244ffee7 JK |
734 | return true; |
735 | } | |
736 | break; | |
737 | ||
738 | case SHT_HASH: | |
244ffee7 JK |
739 | #if 0 |
740 | fprintf (stderr, "Dynamic Linking sections not yet supported.\n"); | |
741 | BFD_FAIL (); | |
742 | #endif | |
743 | break; | |
744 | ||
745 | case SHT_NOTE: | |
746 | #if 0 | |
747 | fprintf (stderr, "Note Sections not yet supported.\n"); | |
748 | BFD_FAIL (); | |
749 | #endif | |
750 | break; | |
751 | ||
752 | case SHT_SHLIB: | |
753 | #if 0 | |
754 | fprintf (stderr, "SHLIB Sections not supported (and non conforming.)\n"); | |
755 | #endif | |
756 | return true; | |
757 | ||
758 | default: | |
e621c5cc ILT |
759 | /* Check for any processor-specific section types. */ |
760 | { | |
761 | struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
762 | ||
763 | if (bed->elf_backend_section_from_shdr) | |
764 | (*bed->elf_backend_section_from_shdr) (abfd, hdr, name); | |
765 | } | |
244ffee7 JK |
766 | break; |
767 | } | |
768 | ||
769 | return true; | |
770 | } | |
771 | ||
fce36137 | 772 | boolean |
1c6042ee ILT |
773 | elf_new_section_hook (abfd, sec) |
774 | bfd *abfd | |
775 | ; | |
776 | asection *sec; | |
fce36137 | 777 | { |
32090b8e | 778 | struct bfd_elf_section_data *sdata; |
300adb31 KR |
779 | |
780 | sdata = (struct bfd_elf_section_data *) bfd_alloc (abfd, sizeof (*sdata)); | |
9783e04a DM |
781 | if (!sdata) |
782 | { | |
d1ad85a6 | 783 | bfd_set_error (bfd_error_no_memory); |
9783e04a DM |
784 | return false; |
785 | } | |
300adb31 | 786 | sec->used_by_bfd = (PTR) sdata; |
32090b8e | 787 | memset (sdata, 0, sizeof (*sdata)); |
244ffee7 JK |
788 | return true; |
789 | } | |
790 | ||
791 | /* Create a new bfd section from an ELF program header. | |
792 | ||
793 | Since program segments have no names, we generate a synthetic name | |
794 | of the form segment<NUM>, where NUM is generally the index in the | |
795 | program header table. For segments that are split (see below) we | |
796 | generate the names segment<NUM>a and segment<NUM>b. | |
797 | ||
798 | Note that some program segments may have a file size that is different than | |
799 | (less than) the memory size. All this means is that at execution the | |
800 | system must allocate the amount of memory specified by the memory size, | |
801 | but only initialize it with the first "file size" bytes read from the | |
802 | file. This would occur for example, with program segments consisting | |
803 | of combined data+bss. | |
804 | ||
805 | To handle the above situation, this routine generates TWO bfd sections | |
806 | for the single program segment. The first has the length specified by | |
807 | the file size of the segment, and the second has the length specified | |
808 | by the difference between the two sizes. In effect, the segment is split | |
809 | into it's initialized and uninitialized parts. | |
810 | ||
811 | */ | |
812 | ||
813 | static boolean | |
1c6042ee ILT |
814 | bfd_section_from_phdr (abfd, hdr, index) |
815 | bfd *abfd; | |
816 | Elf_Internal_Phdr *hdr; | |
817 | int index; | |
244ffee7 JK |
818 | { |
819 | asection *newsect; | |
820 | char *name; | |
821 | char namebuf[64]; | |
822 | int split; | |
823 | ||
824 | split = ((hdr->p_memsz > 0) && | |
825 | (hdr->p_filesz > 0) && | |
826 | (hdr->p_memsz > hdr->p_filesz)); | |
827 | sprintf (namebuf, split ? "segment%da" : "segment%d", index); | |
828 | name = bfd_alloc (abfd, strlen (namebuf) + 1); | |
9783e04a DM |
829 | if (!name) |
830 | { | |
d1ad85a6 | 831 | bfd_set_error (bfd_error_no_memory); |
9783e04a DM |
832 | return false; |
833 | } | |
244ffee7 JK |
834 | strcpy (name, namebuf); |
835 | newsect = bfd_make_section (abfd, name); | |
2e03ce18 ILT |
836 | if (newsect == NULL) |
837 | return false; | |
244ffee7 JK |
838 | newsect->vma = hdr->p_vaddr; |
839 | newsect->_raw_size = hdr->p_filesz; | |
840 | newsect->filepos = hdr->p_offset; | |
841 | newsect->flags |= SEC_HAS_CONTENTS; | |
842 | if (hdr->p_type == PT_LOAD) | |
843 | { | |
844 | newsect->flags |= SEC_ALLOC; | |
845 | newsect->flags |= SEC_LOAD; | |
846 | if (hdr->p_flags & PF_X) | |
847 | { | |
848 | /* FIXME: all we known is that it has execute PERMISSION, | |
849 | may be data. */ | |
850 | newsect->flags |= SEC_CODE; | |
851 | } | |
852 | } | |
853 | if (!(hdr->p_flags & PF_W)) | |
854 | { | |
855 | newsect->flags |= SEC_READONLY; | |
856 | } | |
857 | ||
858 | if (split) | |
859 | { | |
860 | sprintf (namebuf, "segment%db", index); | |
861 | name = bfd_alloc (abfd, strlen (namebuf) + 1); | |
9783e04a DM |
862 | if (!name) |
863 | { | |
d1ad85a6 | 864 | bfd_set_error (bfd_error_no_memory); |
9783e04a DM |
865 | return false; |
866 | } | |
244ffee7 JK |
867 | strcpy (name, namebuf); |
868 | newsect = bfd_make_section (abfd, name); | |
2e03ce18 ILT |
869 | if (newsect == NULL) |
870 | return false; | |
244ffee7 JK |
871 | newsect->vma = hdr->p_vaddr + hdr->p_filesz; |
872 | newsect->_raw_size = hdr->p_memsz - hdr->p_filesz; | |
873 | if (hdr->p_type == PT_LOAD) | |
874 | { | |
875 | newsect->flags |= SEC_ALLOC; | |
876 | if (hdr->p_flags & PF_X) | |
877 | newsect->flags |= SEC_CODE; | |
878 | } | |
879 | if (!(hdr->p_flags & PF_W)) | |
880 | newsect->flags |= SEC_READONLY; | |
881 | } | |
882 | ||
883 | return true; | |
884 | } | |
885 | ||
32090b8e | 886 | /* Begin processing a given object. |
244ffee7 | 887 | |
32090b8e KR |
888 | First we validate the file by reading in the ELF header and checking |
889 | the magic number. */ | |
890 | ||
891 | static INLINE boolean | |
1c6042ee ILT |
892 | elf_file_p (x_ehdrp) |
893 | Elf_External_Ehdr *x_ehdrp; | |
244ffee7 | 894 | { |
32090b8e KR |
895 | return ((x_ehdrp->e_ident[EI_MAG0] == ELFMAG0) |
896 | && (x_ehdrp->e_ident[EI_MAG1] == ELFMAG1) | |
897 | && (x_ehdrp->e_ident[EI_MAG2] == ELFMAG2) | |
898 | && (x_ehdrp->e_ident[EI_MAG3] == ELFMAG3)); | |
899 | } | |
244ffee7 | 900 | |
d24928c0 KR |
901 | /* Check to see if the file associated with ABFD matches the target vector |
902 | that ABFD points to. | |
903 | ||
904 | Note that we may be called several times with the same ABFD, but different | |
905 | target vectors, most of which will not match. We have to avoid leaving | |
906 | any side effects in ABFD, or any data it points to (like tdata), if the | |
6ec3bb6a | 907 | file does not match the target vector. */ |
d24928c0 | 908 | |
32090b8e | 909 | bfd_target * |
1c6042ee ILT |
910 | elf_object_p (abfd) |
911 | bfd *abfd; | |
244ffee7 | 912 | { |
32090b8e KR |
913 | Elf_External_Ehdr x_ehdr; /* Elf file header, external form */ |
914 | Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */ | |
915 | Elf_External_Shdr x_shdr; /* Section header table entry, external form */ | |
6ec3bb6a | 916 | Elf_Internal_Shdr *i_shdrp = NULL; /* Section header table, internal form */ |
68241b2b | 917 | unsigned int shindex; |
32090b8e | 918 | char *shstrtab; /* Internal copy of section header stringtab */ |
062189c6 | 919 | struct elf_backend_data *ebd; |
d24928c0 | 920 | struct elf_obj_tdata *preserved_tdata = elf_tdata (abfd); |
6ec3bb6a | 921 | struct elf_obj_tdata *new_tdata = NULL; |
244ffee7 | 922 | |
32090b8e KR |
923 | /* Read in the ELF header in external format. */ |
924 | ||
925 | if (bfd_read ((PTR) & x_ehdr, sizeof (x_ehdr), 1, abfd) != sizeof (x_ehdr)) | |
25057836 JL |
926 | { |
927 | if (bfd_get_error () != bfd_error_system_call) | |
928 | goto got_wrong_format_error; | |
929 | else | |
930 | goto got_no_match; | |
931 | } | |
244ffee7 | 932 | |
32090b8e KR |
933 | /* Now check to see if we have a valid ELF file, and one that BFD can |
934 | make use of. The magic number must match, the address size ('class') | |
935 | and byte-swapping must match our XVEC entry, and it must have a | |
936 | section header table (FIXME: See comments re sections at top of this | |
937 | file). */ | |
244ffee7 | 938 | |
d24928c0 KR |
939 | if ((elf_file_p (&x_ehdr) == false) || |
940 | (x_ehdr.e_ident[EI_VERSION] != EV_CURRENT) || | |
941 | (x_ehdr.e_ident[EI_CLASS] != ELFCLASS)) | |
942 | goto got_wrong_format_error; | |
244ffee7 | 943 | |
d24928c0 | 944 | /* Check that file's byte order matches xvec's */ |
32090b8e | 945 | switch (x_ehdr.e_ident[EI_DATA]) |
244ffee7 | 946 | { |
32090b8e KR |
947 | case ELFDATA2MSB: /* Big-endian */ |
948 | if (!abfd->xvec->header_byteorder_big_p) | |
d24928c0 | 949 | goto got_wrong_format_error; |
32090b8e KR |
950 | break; |
951 | case ELFDATA2LSB: /* Little-endian */ | |
952 | if (abfd->xvec->header_byteorder_big_p) | |
d24928c0 | 953 | goto got_wrong_format_error; |
32090b8e KR |
954 | break; |
955 | case ELFDATANONE: /* No data encoding specified */ | |
956 | default: /* Unknown data encoding specified */ | |
d24928c0 | 957 | goto got_wrong_format_error; |
244ffee7 | 958 | } |
244ffee7 | 959 | |
32090b8e | 960 | /* Allocate an instance of the elf_obj_tdata structure and hook it up to |
6ec3bb6a | 961 | the tdata pointer in the bfd. */ |
244ffee7 | 962 | |
6ec3bb6a ILT |
963 | new_tdata = ((struct elf_obj_tdata *) |
964 | bfd_zalloc (abfd, sizeof (struct elf_obj_tdata))); | |
965 | if (new_tdata == NULL) | |
d24928c0 | 966 | goto got_no_memory_error; |
6ec3bb6a | 967 | elf_tdata (abfd) = new_tdata; |
244ffee7 | 968 | |
32090b8e KR |
969 | /* Now that we know the byte order, swap in the rest of the header */ |
970 | i_ehdrp = elf_elfheader (abfd); | |
971 | elf_swap_ehdr_in (abfd, &x_ehdr, i_ehdrp); | |
972 | #if DEBUG & 1 | |
973 | elf_debug_file (i_ehdrp); | |
244ffee7 JK |
974 | #endif |
975 | ||
32090b8e KR |
976 | /* If there is no section header table, we're hosed. */ |
977 | if (i_ehdrp->e_shoff == 0) | |
d24928c0 | 978 | goto got_wrong_format_error; |
244ffee7 | 979 | |
062189c6 ILT |
980 | /* As a simple sanity check, verify that the what BFD thinks is the |
981 | size of each section header table entry actually matches the size | |
982 | recorded in the file. */ | |
983 | if (i_ehdrp->e_shentsize != sizeof (x_shdr)) | |
984 | goto got_wrong_format_error; | |
985 | ||
986 | ebd = get_elf_backend_data (abfd); | |
987 | ||
988 | /* Check that the ELF e_machine field matches what this particular | |
989 | BFD format expects. */ | |
990 | if (ebd->elf_machine_code != i_ehdrp->e_machine) | |
991 | { | |
992 | bfd_target **target_ptr; | |
993 | ||
994 | if (ebd->elf_machine_code != EM_NONE) | |
995 | goto got_wrong_format_error; | |
996 | ||
997 | /* This is the generic ELF target. Let it match any ELF target | |
998 | for which we do not have a specific backend. */ | |
f4bd7a8f | 999 | for (target_ptr = bfd_target_vector; *target_ptr != NULL; target_ptr++) |
062189c6 ILT |
1000 | { |
1001 | struct elf_backend_data *back; | |
1002 | ||
1003 | if ((*target_ptr)->flavour != bfd_target_elf_flavour) | |
1004 | continue; | |
1005 | back = (struct elf_backend_data *) (*target_ptr)->backend_data; | |
1006 | if (back->elf_machine_code == i_ehdrp->e_machine) | |
1007 | { | |
1008 | /* target_ptr is an ELF backend which matches this | |
1009 | object file, so reject the generic ELF target. */ | |
1010 | goto got_wrong_format_error; | |
1011 | } | |
1012 | } | |
1013 | } | |
1014 | ||
062189c6 ILT |
1015 | /* Set the flags and architecture before calling the backend so that |
1016 | it can override them. */ | |
7b8106b4 | 1017 | if (i_ehdrp->e_type == ET_EXEC) |
32090b8e | 1018 | abfd->flags |= EXEC_P; |
7b8106b4 ILT |
1019 | else if (i_ehdrp->e_type == ET_DYN) |
1020 | abfd->flags |= DYNAMIC; | |
244ffee7 | 1021 | |
6ec3bb6a ILT |
1022 | if (! bfd_default_set_arch_mach (abfd, ebd->arch, 0)) |
1023 | goto got_no_match; | |
32090b8e | 1024 | |
062189c6 ILT |
1025 | /* Remember the entry point specified in the ELF file header. */ |
1026 | bfd_get_start_address (abfd) = i_ehdrp->e_entry; | |
32090b8e | 1027 | |
062189c6 ILT |
1028 | /* Let the backend double check the format and override global |
1029 | information. */ | |
1030 | if (ebd->elf_backend_object_p) | |
1031 | { | |
1032 | if ((*ebd->elf_backend_object_p) (abfd) == false) | |
1033 | goto got_wrong_format_error; | |
1034 | } | |
1c6042ee | 1035 | |
32090b8e KR |
1036 | /* Allocate space for a copy of the section header table in |
1037 | internal form, seek to the section header table in the file, | |
062189c6 | 1038 | read it in, and convert it to internal form. */ |
6ec3bb6a ILT |
1039 | i_shdrp = ((Elf_Internal_Shdr *) |
1040 | bfd_alloc (abfd, sizeof (*i_shdrp) * i_ehdrp->e_shnum)); | |
1041 | elf_elfsections (abfd) = ((Elf_Internal_Shdr **) | |
1042 | bfd_alloc (abfd, | |
1043 | sizeof (i_shdrp) * i_ehdrp->e_shnum)); | |
1c6042ee | 1044 | if (!i_shdrp || !elf_elfsections (abfd)) |
d24928c0 | 1045 | goto got_no_memory_error; |
6ec3bb6a | 1046 | if (bfd_seek (abfd, i_ehdrp->e_shoff, SEEK_SET) != 0) |
25057836 | 1047 | goto got_no_match; |
32090b8e | 1048 | for (shindex = 0; shindex < i_ehdrp->e_shnum; shindex++) |
244ffee7 | 1049 | { |
d24928c0 | 1050 | if (bfd_read ((PTR) & x_shdr, sizeof x_shdr, 1, abfd) != sizeof (x_shdr)) |
25057836 | 1051 | goto got_no_match; |
32090b8e | 1052 | elf_swap_shdr_in (abfd, &x_shdr, i_shdrp + shindex); |
1c6042ee | 1053 | elf_elfsections (abfd)[shindex] = i_shdrp + shindex; |
38a5f510 ILT |
1054 | |
1055 | /* If this is a .dynamic section, mark the object file as being | |
1056 | dynamically linked. */ | |
1057 | if (i_shdrp[shindex].sh_type == SHT_DYNAMIC) | |
1058 | abfd->flags |= DYNAMIC; | |
244ffee7 | 1059 | } |
32090b8e | 1060 | if (i_ehdrp->e_shstrndx) |
244ffee7 | 1061 | { |
2e03ce18 ILT |
1062 | if (! bfd_section_from_shdr (abfd, i_ehdrp->e_shstrndx)) |
1063 | goto got_no_match; | |
244ffee7 JK |
1064 | } |
1065 | ||
32090b8e KR |
1066 | /* Read in the string table containing the names of the sections. We |
1067 | will need the base pointer to this table later. */ | |
1068 | /* We read this inline now, so that we don't have to go through | |
1069 | bfd_section_from_shdr with it (since this particular strtab is | |
1070 | used to find all of the ELF section names.) */ | |
244ffee7 | 1071 | |
32090b8e KR |
1072 | shstrtab = elf_get_str_section (abfd, i_ehdrp->e_shstrndx); |
1073 | if (!shstrtab) | |
6ec3bb6a | 1074 | goto got_no_match; |
244ffee7 | 1075 | |
32090b8e KR |
1076 | /* Once all of the section headers have been read and converted, we |
1077 | can start processing them. Note that the first section header is | |
6ec3bb6a | 1078 | a dummy placeholder entry, so we ignore it. */ |
244ffee7 | 1079 | |
32090b8e KR |
1080 | for (shindex = 1; shindex < i_ehdrp->e_shnum; shindex++) |
1081 | { | |
2e03ce18 ILT |
1082 | if (! bfd_section_from_shdr (abfd, shindex)) |
1083 | goto got_no_match; | |
32090b8e | 1084 | } |
244ffee7 | 1085 | |
d24928c0 KR |
1086 | return (abfd->xvec); |
1087 | ||
1c6042ee | 1088 | got_wrong_format_error: |
d1ad85a6 | 1089 | bfd_set_error (bfd_error_wrong_format); |
d24928c0 | 1090 | goto got_no_match; |
1c6042ee | 1091 | got_no_memory_error: |
d1ad85a6 | 1092 | bfd_set_error (bfd_error_no_memory); |
d24928c0 | 1093 | goto got_no_match; |
1c6042ee | 1094 | got_no_match: |
6ec3bb6a ILT |
1095 | if (new_tdata != NULL |
1096 | && new_tdata->elf_sect_ptr != NULL) | |
1097 | bfd_release (abfd, new_tdata->elf_sect_ptr); | |
1098 | if (i_shdrp != NULL) | |
1099 | bfd_release (abfd, i_shdrp); | |
1100 | if (new_tdata != NULL) | |
1101 | bfd_release (abfd, new_tdata); | |
d24928c0 KR |
1102 | elf_tdata (abfd) = preserved_tdata; |
1103 | return (NULL); | |
32090b8e | 1104 | } |
32090b8e | 1105 | \f |
1c6042ee | 1106 | |
32090b8e KR |
1107 | /* ELF .o/exec file writing */ |
1108 | ||
d24928c0 KR |
1109 | /* Takes a bfd and a symbol, returns a pointer to the elf specific area |
1110 | of the symbol if there is one. */ | |
32090b8e | 1111 | static INLINE elf_symbol_type * |
1c6042ee ILT |
1112 | elf_symbol_from (ignore_abfd, symbol) |
1113 | bfd *ignore_abfd; | |
1114 | asymbol *symbol; | |
244ffee7 | 1115 | { |
32090b8e KR |
1116 | if (symbol->the_bfd->xvec->flavour != bfd_target_elf_flavour) |
1117 | return 0; | |
1118 | ||
1119 | if (symbol->the_bfd->tdata.elf_obj_data == (struct elf_obj_tdata *) NULL) | |
1120 | return 0; | |
1121 | ||
1122 | return (elf_symbol_type *) symbol; | |
244ffee7 JK |
1123 | } |
1124 | ||
d24928c0 | 1125 | /* Create ELF output from BFD sections. |
244ffee7 | 1126 | |
d24928c0 KR |
1127 | Essentially, just create the section header and forget about the program |
1128 | header for now. */ | |
244ffee7 | 1129 | |
32090b8e | 1130 | static void |
1c6042ee ILT |
1131 | elf_make_sections (abfd, asect, obj) |
1132 | bfd *abfd; | |
1133 | asection *asect; | |
1134 | PTR obj; | |
32090b8e KR |
1135 | { |
1136 | /* most of what is in bfd_shdr_from_section goes in here... */ | |
1137 | /* and all of these sections generate at *least* one ELF section. */ | |
32090b8e KR |
1138 | Elf_Internal_Shdr *this_hdr; |
1139 | this_hdr = &elf_section_data (asect)->this_hdr; | |
244ffee7 | 1140 | |
32090b8e KR |
1141 | this_hdr->sh_addr = asect->vma; |
1142 | this_hdr->sh_size = asect->_raw_size; | |
1143 | /* contents already set by elf_set_section_contents */ | |
244ffee7 | 1144 | |
300adb31 | 1145 | if (asect->flags & SEC_RELOC) |
244ffee7 | 1146 | { |
32090b8e KR |
1147 | /* emit a reloc section, and thus strtab and symtab... */ |
1148 | Elf_Internal_Shdr *rela_hdr; | |
32090b8e | 1149 | int use_rela_p = get_elf_backend_data (abfd)->use_rela_p; |
244ffee7 | 1150 | |
32090b8e | 1151 | rela_hdr = &elf_section_data (asect)->rel_hdr; |
244ffee7 | 1152 | |
32090b8e KR |
1153 | /* orelocation has the data, reloc_count has the count... */ |
1154 | if (use_rela_p) | |
1155 | { | |
1156 | rela_hdr->sh_type = SHT_RELA; | |
1157 | rela_hdr->sh_entsize = sizeof (Elf_External_Rela); | |
1158 | } | |
1159 | else | |
1160 | /* REL relocations */ | |
1161 | { | |
1162 | rela_hdr->sh_type = SHT_REL; | |
1163 | rela_hdr->sh_entsize = sizeof (Elf_External_Rel); | |
1164 | } | |
1165 | rela_hdr->sh_flags = 0; | |
1166 | rela_hdr->sh_addr = 0; | |
1167 | rela_hdr->sh_offset = 0; | |
062189c6 ILT |
1168 | |
1169 | /* FIXME: Systems I've checked use an alignment of 4, but it is | |
1170 | possible that some systems use a different alignment. */ | |
1171 | rela_hdr->sh_addralign = 4; | |
1172 | ||
32090b8e KR |
1173 | rela_hdr->size = 0; |
1174 | } | |
1175 | if (asect->flags & SEC_ALLOC) | |
244ffee7 | 1176 | { |
32090b8e KR |
1177 | this_hdr->sh_flags |= SHF_ALLOC; |
1178 | if (asect->flags & SEC_LOAD) | |
1179 | { | |
1180 | /* @@ Do something with sh_type? */ | |
1181 | } | |
244ffee7 | 1182 | } |
f035cc47 ILT |
1183 | else |
1184 | { | |
1185 | /* If this section is not part of the program image during | |
1186 | execution, leave the address fields at 0. */ | |
1187 | this_hdr->sh_addr = 0; | |
1188 | asect->vma = 0; | |
1189 | } | |
32090b8e KR |
1190 | if (!(asect->flags & SEC_READONLY)) |
1191 | this_hdr->sh_flags |= SHF_WRITE; | |
244ffee7 | 1192 | |
32090b8e KR |
1193 | if (asect->flags & SEC_CODE) |
1194 | this_hdr->sh_flags |= SHF_EXECINSTR; | |
1195 | } | |
244ffee7 | 1196 | |
32090b8e KR |
1197 | void |
1198 | write_relocs (abfd, sec, xxx) | |
1199 | bfd *abfd; | |
1200 | asection *sec; | |
1201 | PTR xxx; | |
1202 | { | |
1203 | Elf_Internal_Shdr *rela_hdr; | |
1204 | Elf_External_Rela *outbound_relocas; | |
1205 | Elf_External_Rel *outbound_relocs; | |
1206 | int idx; | |
1207 | int use_rela_p = get_elf_backend_data (abfd)->use_rela_p; | |
300adb31 | 1208 | asymbol *last_sym = 0; |
38a5f510 | 1209 | int last_sym_idx = 9999999; /* should always be written before use */ |
244ffee7 | 1210 | |
32090b8e KR |
1211 | if ((sec->flags & SEC_RELOC) == 0) |
1212 | return; | |
6ec3bb6a ILT |
1213 | |
1214 | /* The linker backend writes the relocs out itself, and sets the | |
1215 | reloc_count field to zero to inhibit writing them here. Also, | |
1216 | sometimes the SEC_RELOC flag gets set even when there aren't any | |
1217 | relocs. */ | |
32090b8e KR |
1218 | if (sec->reloc_count == 0) |
1219 | return; | |
244ffee7 | 1220 | |
32090b8e | 1221 | rela_hdr = &elf_section_data (sec)->rel_hdr; |
244ffee7 | 1222 | |
32090b8e KR |
1223 | rela_hdr->sh_size = rela_hdr->sh_entsize * sec->reloc_count; |
1224 | rela_hdr->contents = (void *) bfd_alloc (abfd, rela_hdr->sh_size); | |
9783e04a DM |
1225 | if (!rela_hdr->contents) |
1226 | { | |
d1ad85a6 | 1227 | bfd_set_error (bfd_error_no_memory); |
1c6042ee | 1228 | abort (); /* FIXME */ |
9783e04a | 1229 | } |
244ffee7 | 1230 | |
32090b8e | 1231 | /* orelocation has the data, reloc_count has the count... */ |
300adb31 KR |
1232 | if (use_rela_p) |
1233 | { | |
1234 | outbound_relocas = (Elf_External_Rela *) rela_hdr->contents; | |
1235 | ||
1236 | for (idx = 0; idx < sec->reloc_count; idx++) | |
32090b8e | 1237 | { |
300adb31 KR |
1238 | Elf_Internal_Rela dst_rela; |
1239 | Elf_External_Rela *src_rela; | |
1240 | arelent *ptr; | |
1241 | asymbol *sym; | |
1242 | int n; | |
1243 | ||
1244 | ptr = sec->orelocation[idx]; | |
1245 | src_rela = outbound_relocas + idx; | |
1246 | if (!(abfd->flags & EXEC_P)) | |
1247 | dst_rela.r_offset = ptr->address - sec->vma; | |
1248 | else | |
1249 | dst_rela.r_offset = ptr->address; | |
6a3eb9b6 | 1250 | |
300adb31 KR |
1251 | sym = *ptr->sym_ptr_ptr; |
1252 | if (sym == last_sym) | |
1253 | n = last_sym_idx; | |
1254 | else | |
32090b8e | 1255 | { |
300adb31 KR |
1256 | last_sym = sym; |
1257 | last_sym_idx = n = elf_symbol_from_bfd_symbol (abfd, &sym); | |
32090b8e | 1258 | } |
300adb31 KR |
1259 | dst_rela.r_info = ELF_R_INFO (n, ptr->howto->type); |
1260 | ||
1261 | dst_rela.r_addend = ptr->addend; | |
1262 | elf_swap_reloca_out (abfd, &dst_rela, src_rela); | |
244ffee7 | 1263 | } |
300adb31 KR |
1264 | } |
1265 | else | |
1266 | /* REL relocations */ | |
1267 | { | |
1268 | outbound_relocs = (Elf_External_Rel *) rela_hdr->contents; | |
1269 | ||
1270 | for (idx = 0; idx < sec->reloc_count; idx++) | |
32090b8e | 1271 | { |
300adb31 KR |
1272 | Elf_Internal_Rel dst_rel; |
1273 | Elf_External_Rel *src_rel; | |
1274 | arelent *ptr; | |
1275 | int n; | |
1276 | asymbol *sym; | |
1277 | ||
1278 | ptr = sec->orelocation[idx]; | |
1279 | sym = *ptr->sym_ptr_ptr; | |
1280 | src_rel = outbound_relocs + idx; | |
1281 | if (!(abfd->flags & EXEC_P)) | |
1282 | dst_rel.r_offset = ptr->address - sec->vma; | |
1283 | else | |
1284 | dst_rel.r_offset = ptr->address; | |
244ffee7 | 1285 | |
300adb31 KR |
1286 | if (sym == last_sym) |
1287 | n = last_sym_idx; | |
1288 | else | |
32090b8e | 1289 | { |
300adb31 KR |
1290 | last_sym = sym; |
1291 | last_sym_idx = n = elf_symbol_from_bfd_symbol (abfd, &sym); | |
32090b8e | 1292 | } |
300adb31 KR |
1293 | dst_rel.r_info = ELF_R_INFO (n, ptr->howto->type); |
1294 | ||
1295 | elf_swap_reloc_out (abfd, &dst_rel, src_rel); | |
32090b8e | 1296 | } |
300adb31 | 1297 | } |
32090b8e | 1298 | } |
244ffee7 | 1299 | |
32090b8e KR |
1300 | static void |
1301 | fix_up_strtabs (abfd, asect, obj) | |
1302 | bfd *abfd; | |
1303 | asection *asect; | |
1304 | PTR obj; | |
1305 | { | |
1306 | Elf_Internal_Shdr *this_hdr = &elf_section_data (asect)->this_hdr; | |
1c6042ee | 1307 | int this_idx = elf_section_data (asect)->this_idx; |
244ffee7 | 1308 | |
32090b8e KR |
1309 | /* @@ Check flags! */ |
1310 | if (!strncmp (asect->name, ".stab", 5) | |
1311 | && !strcmp ("str", asect->name + strlen (asect->name) - 3)) | |
1312 | { | |
1313 | size_t len = strlen (asect->name) + 1; | |
80425e6c JK |
1314 | char *s = (char *) malloc (len); |
1315 | if (s == NULL) | |
1316 | /* FIXME: Should deal more gracefully with errors. */ | |
1317 | abort (); | |
32090b8e KR |
1318 | strcpy (s, asect->name); |
1319 | s[len - 4] = 0; | |
1320 | asect = bfd_get_section_by_name (abfd, s); | |
80425e6c | 1321 | free (s); |
32090b8e KR |
1322 | if (!asect) |
1323 | abort (); | |
1c6042ee | 1324 | elf_section_data (asect)->this_hdr.sh_link = this_idx; |
32090b8e | 1325 | /* @@ Assuming 32 bits! */ |
1c6042ee | 1326 | elf_section_data (asect)->this_hdr.sh_entsize = 0xc; |
01383fb4 KR |
1327 | |
1328 | this_hdr->sh_type = SHT_STRTAB; | |
244ffee7 | 1329 | } |
32090b8e | 1330 | } |
244ffee7 | 1331 | |
32090b8e | 1332 | static void |
1c6042ee ILT |
1333 | elf_fake_sections (abfd, asect, obj) |
1334 | bfd *abfd; | |
1335 | asection *asect; | |
1336 | PTR obj; | |
32090b8e KR |
1337 | { |
1338 | /* most of what is in bfd_shdr_from_section goes in here... */ | |
1339 | /* and all of these sections generate at *least* one ELF section. */ | |
244ffee7 | 1340 | |
32090b8e KR |
1341 | Elf_Internal_Shdr *this_hdr; |
1342 | this_hdr = &elf_section_data (asect)->this_hdr; | |
1343 | this_hdr->sh_name = | |
1344 | bfd_add_to_strtab (abfd, elf_shstrtab (abfd), asect->name); | |
6ec3bb6a ILT |
1345 | if (this_hdr->sh_name == (unsigned long) -1) |
1346 | abort (); /* FIXME */ | |
32090b8e KR |
1347 | /* We need to log the type *now* so that elf_section_from_bfd_section |
1348 | can find us... have to set rawdata too. */ | |
1349 | this_hdr->rawdata = (void *) asect; | |
1350 | this_hdr->sh_addralign = 1 << asect->alignment_power; | |
013dec1a ILT |
1351 | |
1352 | /* FIXME: This should not be based on section names. */ | |
1353 | if (strcmp (asect->name, ".dynstr") == 0) | |
1354 | this_hdr->sh_type = SHT_STRTAB; | |
1355 | else if (strcmp (asect->name, ".hash") == 0) | |
1356 | this_hdr->sh_type = SHT_HASH; | |
1357 | else if (strcmp (asect->name, ".dynsym") == 0) | |
1358 | this_hdr->sh_type = SHT_DYNSYM; | |
1359 | else if (strcmp (asect->name, ".dynamic") == 0) | |
1360 | this_hdr->sh_type = SHT_DYNAMIC; | |
1361 | else if (strncmp (asect->name, ".rel.", 5) == 0) | |
1362 | this_hdr->sh_type = SHT_REL; | |
1363 | else if (strncmp (asect->name, ".rela.", 6) == 0) | |
1364 | this_hdr->sh_type = SHT_RELA; | |
1365 | else if ((asect->flags & SEC_ALLOC) && (asect->flags & SEC_LOAD)) | |
32090b8e | 1366 | this_hdr->sh_type = SHT_PROGBITS; |
e621c5cc ILT |
1367 | else if ((asect->flags & SEC_ALLOC) && ((asect->flags & SEC_LOAD) == 0)) |
1368 | { | |
6c35a16d ILT |
1369 | BFD_ASSERT (strcmp (asect->name, ".bss") == 0 |
1370 | || strcmp (asect->name, ".sbss") == 0); | |
e621c5cc ILT |
1371 | this_hdr->sh_type = SHT_NOBITS; |
1372 | } | |
1373 | /* FIXME I am not sure how to detect a .note section from the flags | |
1374 | word of an `asection'. */ | |
1375 | else if (!strcmp (asect->name, ".note")) | |
1376 | this_hdr->sh_type = SHT_NOTE; | |
32090b8e | 1377 | else |
32090b8e KR |
1378 | this_hdr->sh_type = SHT_PROGBITS; |
1379 | ||
1380 | this_hdr->sh_flags = 0; | |
1381 | this_hdr->sh_addr = 0; | |
1382 | this_hdr->sh_size = 0; | |
1383 | this_hdr->sh_entsize = 0; | |
1384 | this_hdr->sh_info = 0; | |
1385 | this_hdr->sh_link = 0; | |
1386 | this_hdr->sh_offset = 0; | |
1387 | this_hdr->size = 0; | |
244ffee7 | 1388 | |
f035cc47 ILT |
1389 | /* Now, check for processor-specific section types. */ |
1390 | { | |
1391 | struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
1392 | ||
1393 | if (bed->elf_backend_fake_sections) | |
1394 | (*bed->elf_backend_fake_sections) (abfd, this_hdr, asect); | |
1395 | } | |
1396 | ||
32090b8e KR |
1397 | { |
1398 | /* Emit a strtab and symtab, and possibly a reloc section. */ | |
1399 | Elf_Internal_Shdr *rela_hdr; | |
244ffee7 | 1400 | |
32090b8e KR |
1401 | /* Note that only one symtab is used, so just remember it |
1402 | for now. */ | |
244ffee7 | 1403 | |
300adb31 | 1404 | if (asect->flags & SEC_RELOC) |
32090b8e KR |
1405 | { |
1406 | int use_rela_p = get_elf_backend_data (abfd)->use_rela_p; | |
244ffee7 | 1407 | |
32090b8e KR |
1408 | rela_hdr = &elf_section_data (asect)->rel_hdr; |
1409 | rela_hdr->sh_name = | |
1410 | bfd_add_2_to_strtab (abfd, elf_shstrtab (abfd), | |
1411 | use_rela_p ? ".rela" : ".rel", | |
1412 | asect->name); | |
1413 | rela_hdr->sh_type = use_rela_p ? SHT_RELA : SHT_REL; | |
1414 | rela_hdr->sh_entsize = (use_rela_p | |
1415 | ? sizeof (Elf_External_Rela) | |
1416 | : sizeof (Elf_External_Rel)); | |
1417 | ||
1418 | rela_hdr->sh_flags = 0; | |
1419 | rela_hdr->sh_addr = 0; | |
1420 | rela_hdr->sh_size = 0; | |
1421 | rela_hdr->sh_offset = 0; | |
062189c6 ILT |
1422 | |
1423 | /* FIXME: Systems I've checked use an alignment of 4, but some | |
1424 | systems may use a different alignment. */ | |
1425 | rela_hdr->sh_addralign = 4; | |
1426 | ||
32090b8e KR |
1427 | rela_hdr->size = 0; |
1428 | } | |
1429 | } | |
1430 | if (asect->flags & SEC_ALLOC) | |
1431 | { | |
1432 | this_hdr->sh_flags |= SHF_ALLOC; | |
1433 | if (asect->flags & SEC_LOAD) | |
1434 | { | |
1435 | /* @@ Do something with sh_type? */ | |
1436 | } | |
1437 | } | |
1438 | if (!(asect->flags & SEC_READONLY)) | |
1439 | this_hdr->sh_flags |= SHF_WRITE; | |
1440 | if (asect->flags & SEC_CODE) | |
1441 | this_hdr->sh_flags |= SHF_EXECINSTR; | |
244ffee7 JK |
1442 | } |
1443 | ||
32090b8e KR |
1444 | /* Map symbol from it's internal number to the external number, moving |
1445 | all local symbols to be at the head of the list. */ | |
244ffee7 | 1446 | |
32090b8e | 1447 | static INLINE int |
062189c6 ILT |
1448 | sym_is_global (abfd, sym) |
1449 | bfd *abfd; | |
32090b8e KR |
1450 | asymbol *sym; |
1451 | { | |
062189c6 ILT |
1452 | /* If the backend has a special mapping, use it. */ |
1453 | if (get_elf_backend_data (abfd)->elf_backend_sym_is_global) | |
1454 | return ((*get_elf_backend_data (abfd)->elf_backend_sym_is_global) | |
1455 | (abfd, sym)); | |
1456 | ||
d24928c0 | 1457 | if (sym->flags & (BSF_GLOBAL | BSF_WEAK)) |
244ffee7 | 1458 | { |
32090b8e KR |
1459 | if (sym->flags & BSF_LOCAL) |
1460 | abort (); | |
1461 | return 1; | |
244ffee7 | 1462 | } |
d24928c0 KR |
1463 | if (sym->section == 0) |
1464 | { | |
1465 | /* Is this valid? */ | |
1466 | abort (); | |
1467 | ||
1468 | return 1; | |
1469 | } | |
32090b8e KR |
1470 | if (sym->section == &bfd_und_section) |
1471 | return 1; | |
1472 | if (bfd_is_com_section (sym->section)) | |
1473 | return 1; | |
1474 | if (sym->flags & (BSF_LOCAL | BSF_SECTION_SYM | BSF_FILE)) | |
1475 | return 0; | |
1476 | return 0; | |
1477 | } | |
244ffee7 | 1478 | |
9783e04a | 1479 | static boolean |
1c6042ee ILT |
1480 | elf_map_symbols (abfd) |
1481 | bfd *abfd; | |
32090b8e KR |
1482 | { |
1483 | int symcount = bfd_get_symcount (abfd); | |
1484 | asymbol **syms = bfd_get_outsymbols (abfd); | |
d24928c0 | 1485 | asymbol **sect_syms; |
32090b8e KR |
1486 | int num_locals = 0; |
1487 | int num_globals = 0; | |
1488 | int num_locals2 = 0; | |
1489 | int num_globals2 = 0; | |
d24928c0 | 1490 | int max_index = 0; |
32090b8e | 1491 | int num_sections = 0; |
d24928c0 | 1492 | Elf_Sym_Extra *sym_extra; |
32090b8e KR |
1493 | int idx; |
1494 | asection *asect; | |
6a3eb9b6 | 1495 | |
32090b8e KR |
1496 | #ifdef DEBUG |
1497 | fprintf (stderr, "elf_map_symbols\n"); | |
1498 | fflush (stderr); | |
1499 | #endif | |
244ffee7 | 1500 | |
e621c5cc ILT |
1501 | /* Add local symbols for each section for which there are relocs. |
1502 | FIXME: How can we tell which sections have relocs at this point? | |
1503 | Will reloc_count always be accurate? Actually, I think most ELF | |
1504 | targets create section symbols for all sections anyhow. */ | |
32090b8e | 1505 | for (asect = abfd->sections; asect; asect = asect->next) |
244ffee7 | 1506 | { |
d24928c0 KR |
1507 | if (max_index < asect->index) |
1508 | max_index = asect->index; | |
244ffee7 JK |
1509 | } |
1510 | ||
d24928c0 KR |
1511 | max_index++; |
1512 | elf_num_section_syms (abfd) = max_index; | |
1513 | sect_syms = (asymbol **) bfd_zalloc (abfd, max_index * sizeof (asymbol *)); | |
1514 | elf_section_syms (abfd) = sect_syms; | |
1515 | ||
5e829a34 | 1516 | if (sect_syms == 0) |
9783e04a | 1517 | { |
d1ad85a6 | 1518 | bfd_set_error (bfd_error_no_memory); |
9783e04a DM |
1519 | return false; |
1520 | } | |
d24928c0 KR |
1521 | |
1522 | for (asect = abfd->sections; asect; asect = asect->next) | |
e621c5cc ILT |
1523 | { |
1524 | asymbol *sym = bfd_make_empty_symbol (abfd); | |
9783e04a DM |
1525 | if (!sym) |
1526 | { | |
d1ad85a6 | 1527 | bfd_set_error (bfd_error_no_memory); |
9783e04a DM |
1528 | return false; |
1529 | } | |
e621c5cc ILT |
1530 | sym->the_bfd = abfd; |
1531 | sym->name = asect->name; | |
1532 | sym->value = asect->vma; | |
1533 | sym->flags = BSF_SECTION_SYM; | |
1534 | sym->section = asect; | |
1535 | sect_syms[asect->index] = sym; | |
1536 | num_sections++; | |
d24928c0 | 1537 | #ifdef DEBUG |
e621c5cc ILT |
1538 | fprintf (stderr, |
1539 | "creating section symbol, name = %s, value = 0x%.8lx, index = %d, section = 0x%.8lx\n", | |
1540 | asect->name, (long) asect->vma, asect->index, (long) asect); | |
d24928c0 | 1541 | #endif |
e621c5cc | 1542 | } |
d24928c0 | 1543 | |
32090b8e | 1544 | if (num_sections) |
244ffee7 | 1545 | { |
32090b8e KR |
1546 | if (syms) |
1547 | syms = (asymbol **) bfd_realloc (abfd, syms, | |
1548 | ((symcount + num_sections + 1) | |
1549 | * sizeof (asymbol *))); | |
1550 | else | |
1551 | syms = (asymbol **) bfd_alloc (abfd, | |
1c6042ee | 1552 | (num_sections + 1) * sizeof (asymbol *)); |
9783e04a DM |
1553 | if (!syms) |
1554 | { | |
d1ad85a6 | 1555 | bfd_set_error (bfd_error_no_memory); |
9783e04a DM |
1556 | return false; |
1557 | } | |
244ffee7 | 1558 | |
32090b8e KR |
1559 | for (asect = abfd->sections; asect; asect = asect->next) |
1560 | { | |
d24928c0 KR |
1561 | if (sect_syms[asect->index]) |
1562 | syms[symcount++] = sect_syms[asect->index]; | |
32090b8e | 1563 | } |
244ffee7 | 1564 | |
32090b8e KR |
1565 | syms[symcount] = (asymbol *) 0; |
1566 | bfd_set_symtab (abfd, syms, symcount); | |
1567 | } | |
244ffee7 | 1568 | |
d24928c0 KR |
1569 | elf_sym_extra (abfd) = sym_extra |
1570 | = (Elf_Sym_Extra *) bfd_alloc (abfd, symcount * sizeof (Elf_Sym_Extra)); | |
9783e04a DM |
1571 | if (!sym_extra) |
1572 | { | |
d1ad85a6 | 1573 | bfd_set_error (bfd_error_no_memory); |
9783e04a DM |
1574 | return false; |
1575 | } | |
244ffee7 | 1576 | |
32090b8e KR |
1577 | /* Identify and classify all of the symbols. */ |
1578 | for (idx = 0; idx < symcount; idx++) | |
244ffee7 | 1579 | { |
062189c6 | 1580 | if (!sym_is_global (abfd, syms[idx])) |
32090b8e KR |
1581 | num_locals++; |
1582 | else | |
1583 | num_globals++; | |
244ffee7 | 1584 | } |
32090b8e KR |
1585 | |
1586 | /* Now provide mapping information. Add +1 for skipping over the | |
1587 | dummy symbol. */ | |
1588 | for (idx = 0; idx < symcount; idx++) | |
244ffee7 | 1589 | { |
1c6042ee | 1590 | syms[idx]->udata = (PTR) & sym_extra[idx]; |
062189c6 | 1591 | if (!sym_is_global (abfd, syms[idx])) |
d24928c0 | 1592 | sym_extra[idx].elf_sym_num = 1 + num_locals2++; |
32090b8e | 1593 | else |
d24928c0 | 1594 | sym_extra[idx].elf_sym_num = 1 + num_locals + num_globals2++; |
244ffee7 JK |
1595 | } |
1596 | ||
32090b8e KR |
1597 | elf_num_locals (abfd) = num_locals; |
1598 | elf_num_globals (abfd) = num_globals; | |
9783e04a | 1599 | return true; |
32090b8e | 1600 | } |
244ffee7 | 1601 | |
6ec3bb6a ILT |
1602 | /* Compute the file positions we are going to put the sections at, and |
1603 | otherwise prepare to begin writing out the ELF file. If LINK_INFO | |
1604 | is not NULL, this is being called by the ELF backend linker. */ | |
244ffee7 | 1605 | |
32090b8e | 1606 | static boolean |
6ec3bb6a | 1607 | elf_compute_section_file_positions (abfd, link_info) |
1c6042ee | 1608 | bfd *abfd; |
6ec3bb6a | 1609 | struct bfd_link_info *link_info; |
32090b8e | 1610 | { |
6ec3bb6a ILT |
1611 | struct elf_backend_data *bed = get_elf_backend_data (abfd); |
1612 | Elf_Internal_Shdr *shstrtab_hdr; | |
1613 | ||
1614 | if (abfd->output_has_begun) | |
1615 | return true; | |
1616 | ||
1617 | /* Do any elf backend specific processing first. */ | |
1618 | if (bed->elf_backend_begin_write_processing) | |
1619 | (*bed->elf_backend_begin_write_processing) (abfd); | |
1620 | ||
1621 | if (! prep_headers (abfd)) | |
1622 | return false; | |
1623 | ||
32090b8e | 1624 | bfd_map_over_sections (abfd, elf_fake_sections, 0); |
244ffee7 | 1625 | |
9783e04a DM |
1626 | if (!assign_section_numbers (abfd)) |
1627 | return false; | |
244ffee7 | 1628 | |
32090b8e | 1629 | bfd_map_over_sections (abfd, elf_make_sections, 0); |
244ffee7 | 1630 | |
1c6042ee | 1631 | bfd_map_over_sections (abfd, fix_up_strtabs, 0); /* .stab/.stabstr &c */ |
244ffee7 | 1632 | |
6ec3bb6a ILT |
1633 | /* The backend linker builds symbol table information itself. */ |
1634 | if (link_info == NULL) | |
1635 | { | |
1636 | if (! swap_out_syms (abfd)) | |
1637 | return false; | |
1638 | } | |
244ffee7 | 1639 | |
6ec3bb6a ILT |
1640 | shstrtab_hdr = &elf_tdata (abfd)->shstrtab_hdr; |
1641 | /* sh_name was set in prep_headers. */ | |
1642 | shstrtab_hdr->sh_type = SHT_STRTAB; | |
1643 | shstrtab_hdr->sh_flags = 0; | |
1644 | shstrtab_hdr->sh_addr = 0; | |
1645 | shstrtab_hdr->sh_size = elf_shstrtab (abfd)->length; | |
1646 | shstrtab_hdr->sh_entsize = 0; | |
1647 | shstrtab_hdr->sh_link = 0; | |
1648 | shstrtab_hdr->sh_info = 0; | |
1649 | /* sh_offset is set in assign_file_positions_for_symtabs_and_strtabs. */ | |
1650 | shstrtab_hdr->sh_addralign = 1; | |
1651 | shstrtab_hdr->contents = (PTR) elf_shstrtab (abfd)->tab; | |
1652 | ||
1653 | if (!assign_file_positions_except_relocs (abfd, | |
1654 | link_info == NULL ? true : false)) | |
9783e04a | 1655 | return false; |
32090b8e | 1656 | |
6ec3bb6a ILT |
1657 | abfd->output_has_begun = true; |
1658 | ||
32090b8e KR |
1659 | return true; |
1660 | } | |
1661 | ||
244ffee7 | 1662 | |
32090b8e KR |
1663 | /* Assign all ELF section numbers. The dummy first section is handled here |
1664 | too. The link/info pointers for the standard section types are filled | |
1665 | in here too, while we're at it. (Link pointers for .stab sections are | |
1666 | not filled in here.) */ | |
9783e04a | 1667 | static boolean |
32090b8e | 1668 | assign_section_numbers (abfd) |
fce36137 | 1669 | bfd *abfd; |
fce36137 | 1670 | { |
32090b8e KR |
1671 | struct elf_obj_tdata *t = elf_tdata (abfd); |
1672 | asection *sec; | |
1673 | int section_number = 1; | |
1674 | int i; | |
1675 | Elf_Internal_Shdr **i_shdrp; | |
244ffee7 | 1676 | |
1c6042ee ILT |
1677 | t->shstrtab_hdr.sh_size = elf_shstrtab (abfd)->length; |
1678 | t->shstrtab_hdr.contents = (void *) elf_shstrtab (abfd)->tab; | |
244ffee7 | 1679 | |
32090b8e | 1680 | t->shstrtab_section = section_number++; |
1c6042ee | 1681 | elf_elfheader (abfd)->e_shstrndx = t->shstrtab_section; |
32090b8e KR |
1682 | if (abfd->symcount) |
1683 | { | |
1684 | t->symtab_section = section_number++; | |
1685 | t->strtab_section = section_number++; | |
1686 | t->symtab_hdr.sh_link = t->strtab_section; | |
1687 | } | |
1688 | for (sec = abfd->sections; sec; sec = sec->next) | |
1689 | { | |
1690 | struct bfd_elf_section_data *d = elf_section_data (sec); | |
1691 | d->this_idx = section_number++; | |
300adb31 | 1692 | if (sec->flags & SEC_RELOC) |
fce36137 | 1693 | { |
32090b8e KR |
1694 | d->rel_idx = section_number++; |
1695 | d->rel_hdr.sh_link = t->symtab_section; | |
1696 | d->rel_hdr.sh_info = d->this_idx; | |
244ffee7 | 1697 | } |
fce36137 | 1698 | else |
32090b8e KR |
1699 | d->rel_idx = 0; |
1700 | /* No handling for per-section string tables currently. */ | |
1701 | } | |
1c6042ee | 1702 | elf_elfheader (abfd)->e_shnum = section_number; |
32090b8e KR |
1703 | |
1704 | /* Set up the list of section header pointers, in agreement with the | |
1705 | indices. */ | |
6ec3bb6a ILT |
1706 | i_shdrp = ((Elf_Internal_Shdr **) |
1707 | bfd_alloc (abfd, section_number * sizeof (Elf_Internal_Shdr *))); | |
1708 | if (i_shdrp == NULL) | |
1709 | { | |
1710 | bfd_set_error (bfd_error_no_memory); | |
1711 | return false; | |
1712 | } | |
1713 | i_shdrp[0] = ((Elf_Internal_Shdr *) | |
1714 | bfd_alloc (abfd, sizeof (Elf_Internal_Shdr))); | |
1715 | if (i_shdrp[0] == NULL) | |
9783e04a | 1716 | { |
6ec3bb6a | 1717 | bfd_release (abfd, i_shdrp); |
d1ad85a6 | 1718 | bfd_set_error (bfd_error_no_memory); |
9783e04a DM |
1719 | return false; |
1720 | } | |
1c6042ee | 1721 | elf_elfsections (abfd) = i_shdrp; |
6ec3bb6a ILT |
1722 | for (i = 1; i < section_number; i++) |
1723 | i_shdrp[i] = NULL; | |
1724 | memset (i_shdrp[0], 0, sizeof (Elf_Internal_Shdr)); | |
32090b8e | 1725 | |
32090b8e KR |
1726 | i_shdrp[t->shstrtab_section] = &t->shstrtab_hdr; |
1727 | if (abfd->symcount) | |
1728 | { | |
1729 | i_shdrp[t->symtab_section] = &t->symtab_hdr; | |
1730 | i_shdrp[t->strtab_section] = &t->strtab_hdr; | |
244ffee7 | 1731 | } |
32090b8e KR |
1732 | for (sec = abfd->sections; sec; sec = sec->next) |
1733 | { | |
1734 | struct bfd_elf_section_data *d = elf_section_data (sec); | |
1735 | i_shdrp[d->this_idx] = &d->this_hdr; | |
1736 | if (d->rel_idx) | |
1737 | i_shdrp[d->rel_idx] = &d->rel_hdr; | |
1738 | } | |
1739 | /* Make sure we got everything.... */ | |
1740 | for (i = 0; i < section_number; i++) | |
6ec3bb6a | 1741 | if (i_shdrp[i] == NULL) |
32090b8e | 1742 | abort (); |
9783e04a | 1743 | return true; |
32090b8e KR |
1744 | } |
1745 | ||
013dec1a ILT |
1746 | /* Align to the maximum file alignment that could be required for any |
1747 | ELF data structure. */ | |
1748 | ||
1749 | static INLINE file_ptr | |
1750 | align_file_position (off) | |
1751 | file_ptr off; | |
1752 | { | |
1753 | return (off + FILE_ALIGN - 1) & ~(FILE_ALIGN - 1); | |
1754 | } | |
1755 | ||
1756 | /* Assign a file position to a section, optionally aligning to the | |
1757 | required section alignment. */ | |
1758 | ||
32090b8e | 1759 | static INLINE file_ptr |
013dec1a | 1760 | assign_file_position_for_section (i_shdrp, offset, align) |
32090b8e KR |
1761 | Elf_Internal_Shdr *i_shdrp; |
1762 | file_ptr offset; | |
013dec1a | 1763 | boolean align; |
32090b8e | 1764 | { |
013dec1a ILT |
1765 | if (align) |
1766 | { | |
1767 | unsigned int al; | |
f035cc47 | 1768 | |
013dec1a ILT |
1769 | al = i_shdrp->sh_addralign; |
1770 | if (al > 1) | |
1771 | offset = BFD_ALIGN (offset, al); | |
1772 | } | |
1773 | i_shdrp->sh_offset = offset; | |
7b8106b4 ILT |
1774 | if (i_shdrp->rawdata != NULL) |
1775 | ((asection *) i_shdrp->rawdata)->filepos = offset; | |
300adb31 KR |
1776 | if (i_shdrp->sh_type != SHT_NOBITS) |
1777 | offset += i_shdrp->sh_size; | |
32090b8e | 1778 | return offset; |
244ffee7 JK |
1779 | } |
1780 | ||
013dec1a ILT |
1781 | /* Get the size of the program header. This is called by the linker |
1782 | before any of the section VMA's are set, so it can't calculate the | |
1783 | correct value for a strange memory layout. */ | |
01383fb4 | 1784 | |
013dec1a ILT |
1785 | static bfd_size_type |
1786 | get_program_header_size (abfd) | |
300adb31 | 1787 | bfd *abfd; |
300adb31 | 1788 | { |
013dec1a ILT |
1789 | size_t segs; |
1790 | asection *s; | |
300adb31 | 1791 | |
013dec1a ILT |
1792 | /* Assume we will need exactly two PT_LOAD segments: one for text |
1793 | and one for data. */ | |
1794 | segs = 2; | |
1795 | ||
1796 | s = bfd_get_section_by_name (abfd, ".interp"); | |
1797 | if (s != NULL && (s->flags & SEC_LOAD) != 0) | |
1798 | { | |
1799 | /* If we have a loadable interpreter section, we need a | |
1800 | PT_INTERP segment. In this case, assume we also need a | |
1801 | PT_PHDR segment, although that may not be true for all | |
1802 | targets. */ | |
1803 | segs += 2; | |
1804 | } | |
1805 | ||
1806 | if (bfd_get_section_by_name (abfd, ".dynamic") != NULL) | |
1807 | { | |
1808 | /* We need a PT_DYNAMIC segment. */ | |
1809 | ++segs; | |
1810 | } | |
1811 | ||
1812 | return segs * sizeof (Elf_External_Phdr); | |
300adb31 KR |
1813 | } |
1814 | ||
013dec1a ILT |
1815 | /* Create the program header. OFF is the file offset where the |
1816 | program header should be written. FIRST is the first loadable ELF | |
1817 | section. PHDR_SIZE is the size of the program header as returned | |
1818 | by get_program_header_size. */ | |
300adb31 | 1819 | |
013dec1a ILT |
1820 | static file_ptr |
1821 | map_program_segments (abfd, off, first, phdr_size) | |
300adb31 | 1822 | bfd *abfd; |
013dec1a ILT |
1823 | file_ptr off; |
1824 | Elf_Internal_Shdr *first; | |
1825 | bfd_size_type phdr_size; | |
300adb31 | 1826 | { |
6731b89c | 1827 | Elf_Internal_Phdr phdrs[10]; |
013dec1a | 1828 | unsigned int phdr_count; |
300adb31 | 1829 | Elf_Internal_Phdr *phdr; |
013dec1a ILT |
1830 | int phdr_size_adjust; |
1831 | unsigned int i; | |
1832 | Elf_Internal_Shdr **hdrpp; | |
1833 | asection *sinterp, *sdyn; | |
1834 | unsigned int last_type; | |
1835 | Elf_Internal_Ehdr *i_ehdrp; | |
1836 | ||
1837 | BFD_ASSERT ((abfd->flags & EXEC_P) != 0); | |
6731b89c ILT |
1838 | BFD_ASSERT (phdr_size / sizeof (Elf_Internal_Phdr) |
1839 | <= sizeof phdrs / sizeof (phdrs[0])); | |
013dec1a ILT |
1840 | |
1841 | phdr_count = 0; | |
1842 | phdr = phdrs; | |
1843 | ||
1844 | phdr_size_adjust = 0; | |
300adb31 | 1845 | |
013dec1a ILT |
1846 | /* If we have a loadable .interp section, we must create a PT_INTERP |
1847 | segment which must precede all PT_LOAD segments. We assume that | |
1848 | we must also create a PT_PHDR segment, although that may not be | |
1849 | true for all targets. */ | |
1850 | sinterp = bfd_get_section_by_name (abfd, ".interp"); | |
1851 | if (sinterp != NULL && (sinterp->flags & SEC_LOAD) != 0) | |
80425e6c | 1852 | { |
013dec1a ILT |
1853 | BFD_ASSERT (first != NULL); |
1854 | ||
1855 | phdr->p_type = PT_PHDR; | |
1856 | ||
1857 | phdr->p_offset = off; | |
1858 | ||
1859 | /* Account for any adjustment made because of the alignment of | |
1860 | the first loadable section. */ | |
1861 | phdr_size_adjust = (first->sh_offset - phdr_size) - off; | |
1862 | BFD_ASSERT (phdr_size_adjust >= 0 && phdr_size_adjust < 128); | |
1863 | ||
1864 | /* The program header precedes all loadable sections. This lets | |
1865 | us compute its loadable address. This depends on the linker | |
1866 | script. */ | |
1867 | phdr->p_vaddr = first->sh_addr - (phdr_size + phdr_size_adjust); | |
1868 | ||
1869 | phdr->p_paddr = 0; | |
1870 | phdr->p_filesz = phdr_size; | |
1871 | phdr->p_memsz = phdr_size; | |
1872 | ||
1873 | /* FIXME: UnixWare and Solaris set PF_X, Irix 5 does not. */ | |
1874 | phdr->p_flags = PF_R | PF_X; | |
1875 | ||
1876 | phdr->p_align = FILE_ALIGN; | |
1877 | BFD_ASSERT ((phdr->p_vaddr - phdr->p_offset) % FILE_ALIGN == 0); | |
1878 | ||
1879 | /* Include the ELF header in the first loadable segment. */ | |
1880 | phdr_size_adjust += off; | |
1881 | ||
1882 | ++phdr_count; | |
1883 | ++phdr; | |
1884 | ||
1885 | phdr->p_type = PT_INTERP; | |
1886 | phdr->p_offset = sinterp->filepos; | |
1887 | phdr->p_vaddr = sinterp->vma; | |
1888 | phdr->p_paddr = 0; | |
1889 | phdr->p_filesz = sinterp->_raw_size; | |
1890 | phdr->p_memsz = sinterp->_raw_size; | |
1891 | phdr->p_flags = PF_R; | |
1892 | phdr->p_align = 1 << bfd_get_section_alignment (abfd, sinterp); | |
1893 | ||
1894 | ++phdr_count; | |
1895 | ++phdr; | |
80425e6c | 1896 | } |
013dec1a ILT |
1897 | |
1898 | /* Look through the sections to see how they will be divided into | |
1899 | program segments. The sections must be arranged in order by | |
1900 | sh_addr for this to work correctly. */ | |
1901 | phdr->p_type = PT_NULL; | |
1902 | last_type = SHT_PROGBITS; | |
1903 | for (i = 1, hdrpp = elf_elfsections (abfd) + 1; | |
1904 | i < elf_elfheader (abfd)->e_shnum; | |
1905 | i++, hdrpp++) | |
300adb31 | 1906 | { |
013dec1a ILT |
1907 | Elf_Internal_Shdr *hdr; |
1908 | ||
1909 | hdr = *hdrpp; | |
1910 | ||
1911 | /* Ignore any section which will not be part of the process | |
1912 | image. */ | |
1913 | if ((hdr->sh_flags & SHF_ALLOC) == 0) | |
1914 | continue; | |
1915 | ||
1916 | /* If this section fits in the segment we are constructing, add | |
1917 | it in. */ | |
1918 | if (phdr->p_type != PT_NULL | |
1919 | && (hdr->sh_offset - (phdr->p_offset + phdr->p_memsz) | |
1920 | == hdr->sh_addr - (phdr->p_vaddr + phdr->p_memsz)) | |
1921 | && (last_type != SHT_NOBITS || hdr->sh_type == SHT_NOBITS)) | |
300adb31 | 1922 | { |
013dec1a ILT |
1923 | bfd_size_type adjust; |
1924 | ||
1925 | adjust = hdr->sh_addr - (phdr->p_vaddr + phdr->p_memsz); | |
1926 | phdr->p_memsz += hdr->sh_size + adjust; | |
1927 | if (hdr->sh_type != SHT_NOBITS) | |
1928 | phdr->p_filesz += hdr->sh_size + adjust; | |
1929 | if ((hdr->sh_flags & SHF_WRITE) != 0) | |
1930 | phdr->p_flags |= PF_W; | |
1931 | if ((hdr->sh_flags & SHF_EXECINSTR) != 0) | |
1932 | phdr->p_flags |= PF_X; | |
1933 | last_type = hdr->sh_type; | |
300adb31 KR |
1934 | continue; |
1935 | } | |
300adb31 | 1936 | |
013dec1a ILT |
1937 | /* If we have a segment, move to the next one. */ |
1938 | if (phdr->p_type != PT_NULL) | |
300adb31 | 1939 | { |
013dec1a ILT |
1940 | ++phdr; |
1941 | ++phdr_count; | |
300adb31 | 1942 | } |
013dec1a ILT |
1943 | |
1944 | /* Start a new segment. */ | |
1945 | phdr->p_type = PT_LOAD; | |
1946 | phdr->p_offset = hdr->sh_offset; | |
1947 | phdr->p_vaddr = hdr->sh_addr; | |
1948 | phdr->p_paddr = 0; | |
1949 | if (hdr->sh_type == SHT_NOBITS) | |
1950 | phdr->p_filesz = 0; | |
1951 | else | |
1952 | phdr->p_filesz = hdr->sh_size; | |
1953 | phdr->p_memsz = hdr->sh_size; | |
1954 | phdr->p_flags = PF_R; | |
1955 | if ((hdr->sh_flags & SHF_WRITE) != 0) | |
1956 | phdr->p_flags |= PF_W; | |
1957 | if ((hdr->sh_flags & SHF_EXECINSTR) != 0) | |
1958 | phdr->p_flags |= PF_X; | |
1959 | phdr->p_align = get_elf_backend_data (abfd)->maxpagesize; | |
1960 | ||
1961 | if (hdr == first | |
1962 | && sinterp != NULL | |
1963 | && (sinterp->flags & SEC_LOAD) != 0) | |
2f3189e7 | 1964 | { |
013dec1a ILT |
1965 | phdr->p_offset -= phdr_size + phdr_size_adjust; |
1966 | phdr->p_vaddr -= phdr_size + phdr_size_adjust; | |
1967 | phdr->p_filesz += phdr_size + phdr_size_adjust; | |
1968 | phdr->p_memsz += phdr_size + phdr_size_adjust; | |
2f3189e7 | 1969 | } |
300adb31 | 1970 | |
013dec1a | 1971 | last_type = hdr->sh_type; |
300adb31 | 1972 | } |
300adb31 | 1973 | |
013dec1a ILT |
1974 | if (phdr->p_type != PT_NULL) |
1975 | { | |
1976 | ++phdr; | |
1977 | ++phdr_count; | |
1978 | } | |
1979 | ||
1980 | /* If we have a .dynamic section, create a PT_DYNAMIC segment. */ | |
1981 | sdyn = bfd_get_section_by_name (abfd, ".dynamic"); | |
1982 | if (sdyn != NULL && (sdyn->flags & SEC_LOAD) != 0) | |
1983 | { | |
1984 | phdr->p_type = PT_DYNAMIC; | |
1985 | phdr->p_offset = sdyn->filepos; | |
1986 | phdr->p_vaddr = sdyn->vma; | |
1987 | phdr->p_paddr = 0; | |
1988 | phdr->p_filesz = sdyn->_raw_size; | |
1989 | phdr->p_memsz = sdyn->_raw_size; | |
1990 | phdr->p_flags = PF_R; | |
1991 | if ((sdyn->flags & SEC_READONLY) == 0) | |
1992 | phdr->p_flags |= PF_W; | |
1993 | if ((sdyn->flags & SEC_CODE) != 0) | |
1994 | phdr->p_flags |= PF_X; | |
1995 | phdr->p_align = 1 << bfd_get_section_alignment (abfd, sdyn); | |
1996 | ||
1997 | ++phdr; | |
1998 | ++phdr_count; | |
1999 | } | |
2000 | ||
013dec1a ILT |
2001 | /* Make sure the return value from get_program_header_size matches |
2002 | what we computed here. */ | |
2003 | if (phdr_count != phdr_size / sizeof (Elf_Internal_Phdr)) | |
2004 | abort (); | |
2005 | ||
2006 | /* Set up program header information. */ | |
2007 | i_ehdrp = elf_elfheader (abfd); | |
2008 | i_ehdrp->e_phentsize = sizeof (Elf_External_Phdr); | |
2009 | i_ehdrp->e_phoff = off; | |
2010 | i_ehdrp->e_phnum = phdr_count; | |
2011 | ||
2012 | /* Save the program headers away. I don't think anybody uses this | |
2013 | information right now. */ | |
2014 | elf_tdata (abfd)->phdr = ((Elf_Internal_Phdr *) | |
2015 | bfd_alloc (abfd, | |
2016 | (phdr_count | |
2017 | * sizeof (Elf_Internal_Phdr)))); | |
2018 | if (elf_tdata (abfd)->phdr == NULL && phdr_count != 0) | |
2019 | { | |
2020 | bfd_set_error (bfd_error_no_memory); | |
2021 | return (file_ptr) -1; | |
2022 | } | |
2023 | memcpy (elf_tdata (abfd)->phdr, phdrs, | |
2024 | phdr_count * sizeof (Elf_Internal_Phdr)); | |
2025 | ||
2026 | /* Write out the program headers. */ | |
2027 | if (bfd_seek (abfd, off, SEEK_SET) != 0) | |
2028 | return (file_ptr) -1; | |
2029 | ||
2030 | for (i = 0, phdr = phdrs; i < phdr_count; i++, phdr++) | |
2031 | { | |
2032 | Elf_External_Phdr extphdr; | |
2033 | ||
2034 | elf_swap_phdr_out (abfd, phdr, &extphdr); | |
2035 | if (bfd_write (&extphdr, sizeof (Elf_External_Phdr), 1, abfd) | |
2036 | != sizeof (Elf_External_Phdr)) | |
2037 | return (file_ptr) -1; | |
2038 | } | |
2039 | ||
2040 | return off + phdr_count * sizeof (Elf_External_Phdr); | |
300adb31 KR |
2041 | } |
2042 | ||
013dec1a ILT |
2043 | /* Work out the file positions of all the sections. This is called by |
2044 | elf_compute_section_file_positions. All the section sizes and VMAs | |
2045 | must be known before this is called. | |
2046 | ||
2047 | We do not consider reloc sections at this point, unless they form | |
2048 | part of the loadable image. Reloc sections are assigned file | |
2049 | positions in assign_file_positions_for_relocs, which is called by | |
2050 | write_object_contents and final_link. | |
2051 | ||
2052 | If DOSYMS is false, we do not assign file positions for the symbol | |
2053 | table or the string table. */ | |
2054 | ||
9783e04a | 2055 | static boolean |
6ec3bb6a | 2056 | assign_file_positions_except_relocs (abfd, dosyms) |
32090b8e | 2057 | bfd *abfd; |
6ec3bb6a | 2058 | boolean dosyms; |
244ffee7 | 2059 | { |
013dec1a ILT |
2060 | struct elf_obj_tdata * const tdata = elf_tdata (abfd); |
2061 | Elf_Internal_Ehdr * const i_ehdrp = elf_elfheader (abfd); | |
2062 | Elf_Internal_Shdr ** const i_shdrpp = elf_elfsections (abfd); | |
32090b8e | 2063 | file_ptr off; |
32090b8e | 2064 | |
013dec1a | 2065 | /* Start after the ELF header. */ |
32090b8e | 2066 | off = i_ehdrp->e_ehsize; |
300adb31 | 2067 | |
013dec1a | 2068 | if ((abfd->flags & EXEC_P) == 0) |
300adb31 | 2069 | { |
013dec1a ILT |
2070 | Elf_Internal_Shdr **hdrpp; |
2071 | unsigned int i; | |
062189c6 | 2072 | |
013dec1a ILT |
2073 | /* We are not creating an executable, which means that we are |
2074 | not creating a program header, and that the actual order of | |
2075 | the sections in the file is unimportant. */ | |
2076 | for (i = 1, hdrpp = i_shdrpp + 1; i < i_ehdrp->e_shnum; i++, hdrpp++) | |
244ffee7 | 2077 | { |
013dec1a ILT |
2078 | Elf_Internal_Shdr *hdr; |
2079 | ||
2080 | hdr = *hdrpp; | |
2081 | if (hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA) | |
300adb31 | 2082 | { |
013dec1a | 2083 | hdr->sh_offset = -1; |
300adb31 KR |
2084 | continue; |
2085 | } | |
013dec1a ILT |
2086 | if (! dosyms |
2087 | && (i == tdata->symtab_section | |
2088 | || i == tdata->strtab_section)) | |
300adb31 | 2089 | { |
013dec1a ILT |
2090 | hdr->sh_offset = -1; |
2091 | continue; | |
300adb31 | 2092 | } |
013dec1a ILT |
2093 | |
2094 | off = assign_file_position_for_section (hdr, off, true); | |
300adb31 | 2095 | } |
300adb31 | 2096 | } |
013dec1a | 2097 | else |
300adb31 | 2098 | { |
013dec1a ILT |
2099 | file_ptr phdr_off; |
2100 | bfd_size_type phdr_size; | |
2101 | bfd_vma maxpagesize; | |
2102 | Elf_Internal_Shdr **hdrpp; | |
2103 | unsigned int i; | |
2104 | Elf_Internal_Shdr *first; | |
2105 | file_ptr phdr_map; | |
2106 | ||
2107 | /* We are creating an executable. We must create a program | |
2108 | header. We can't actually create the program header until we | |
2109 | have set the file positions for the sections, but we can | |
2110 | figure out how big it is going to be. */ | |
2111 | off = align_file_position (off); | |
2112 | phdr_size = get_program_header_size (abfd); | |
2113 | if (phdr_size == (file_ptr) -1) | |
9783e04a | 2114 | return false; |
013dec1a ILT |
2115 | phdr_off = off; |
2116 | off += phdr_size; | |
2117 | ||
2118 | maxpagesize = get_elf_backend_data (abfd)->maxpagesize; | |
2119 | if (maxpagesize == 0) | |
2120 | maxpagesize = 1; | |
2121 | ||
2122 | /* FIXME: We might want to sort the sections on the sh_addr | |
2123 | field here. For now, we just assume that the linker will | |
2124 | create the sections in an appropriate order. */ | |
2125 | ||
2126 | /* Assign file positions in two passes. In the first pass, we | |
2127 | assign a file position to every section which forms part of | |
2128 | the executable image. */ | |
2129 | first = NULL; | |
2130 | for (i = 1, hdrpp = i_shdrpp + 1; i < i_ehdrp->e_shnum; i++, hdrpp++) | |
2131 | { | |
2132 | Elf_Internal_Shdr *hdr; | |
300adb31 | 2133 | |
013dec1a ILT |
2134 | hdr = *hdrpp; |
2135 | if ((hdr->sh_flags & SHF_ALLOC) == 0) | |
2136 | continue; | |
2137 | ||
2138 | if (first == NULL) | |
2139 | first = hdr; | |
2140 | ||
2141 | if ((abfd->flags & D_PAGED) != 0) | |
2142 | { | |
2143 | /* The section VMA must equal the file position modulo | |
2144 | the page size. This is required by the program | |
2145 | header. */ | |
2146 | off += (hdr->sh_addr - off) % maxpagesize; | |
2147 | } | |
300adb31 | 2148 | |
013dec1a ILT |
2149 | off = assign_file_position_for_section (hdr, off, false); |
2150 | } | |
300adb31 | 2151 | |
013dec1a ILT |
2152 | /* Assign file positions to all the sections which do not form |
2153 | part of the loadable image, except for the relocs. */ | |
2154 | for (i = 1, hdrpp = i_shdrpp + 1; i < i_ehdrp->e_shnum; i++, hdrpp++) | |
300adb31 | 2155 | { |
013dec1a ILT |
2156 | Elf_Internal_Shdr *hdr; |
2157 | ||
2158 | hdr = *hdrpp; | |
2159 | if ((hdr->sh_flags & SHF_ALLOC) != 0) | |
2160 | continue; | |
2161 | if (hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA) | |
2162 | { | |
2163 | hdr->sh_offset = -1; | |
2164 | continue; | |
2165 | } | |
2166 | if (! dosyms | |
2167 | && (i == tdata->symtab_section | |
2168 | || i == tdata->strtab_section)) | |
2169 | { | |
2170 | hdr->sh_offset = -1; | |
2171 | continue; | |
2172 | } | |
2173 | ||
2174 | off = assign_file_position_for_section (hdr, off, true); | |
300adb31 | 2175 | } |
013dec1a ILT |
2176 | |
2177 | phdr_map = map_program_segments (abfd, phdr_off, first, phdr_size); | |
2178 | if (phdr_map == (file_ptr) -1) | |
2179 | return false; | |
2180 | BFD_ASSERT (phdr_map == phdr_off + phdr_size); | |
244ffee7 | 2181 | } |
013dec1a ILT |
2182 | |
2183 | /* Place the section headers. */ | |
2184 | off = align_file_position (off); | |
2185 | i_ehdrp->e_shoff = off; | |
2186 | off += i_ehdrp->e_shnum * i_ehdrp->e_shentsize; | |
2187 | ||
32090b8e | 2188 | elf_tdata (abfd)->next_file_pos = off; |
013dec1a | 2189 | |
9783e04a | 2190 | return true; |
244ffee7 JK |
2191 | } |
2192 | ||
32090b8e KR |
2193 | static boolean |
2194 | prep_headers (abfd) | |
2195 | bfd *abfd; | |
2196 | { | |
32090b8e | 2197 | Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */ |
1c6042ee | 2198 | Elf_Internal_Phdr *i_phdrp = 0; /* Program header table, internal form */ |
32090b8e | 2199 | Elf_Internal_Shdr **i_shdrp; /* Section header table, internal form */ |
32090b8e | 2200 | int count; |
32090b8e | 2201 | struct strtab *shstrtab; |
244ffee7 | 2202 | |
32090b8e KR |
2203 | i_ehdrp = elf_elfheader (abfd); |
2204 | i_shdrp = elf_elfsections (abfd); | |
244ffee7 | 2205 | |
32090b8e | 2206 | shstrtab = bfd_new_strtab (abfd); |
b9d5cdf0 DM |
2207 | if (!shstrtab) |
2208 | return false; | |
1c6042ee | 2209 | |
32090b8e | 2210 | elf_shstrtab (abfd) = shstrtab; |
244ffee7 | 2211 | |
32090b8e KR |
2212 | i_ehdrp->e_ident[EI_MAG0] = ELFMAG0; |
2213 | i_ehdrp->e_ident[EI_MAG1] = ELFMAG1; | |
2214 | i_ehdrp->e_ident[EI_MAG2] = ELFMAG2; | |
2215 | i_ehdrp->e_ident[EI_MAG3] = ELFMAG3; | |
244ffee7 | 2216 | |
32090b8e KR |
2217 | i_ehdrp->e_ident[EI_CLASS] = ELFCLASS; |
2218 | i_ehdrp->e_ident[EI_DATA] = | |
2219 | abfd->xvec->byteorder_big_p ? ELFDATA2MSB : ELFDATA2LSB; | |
2220 | i_ehdrp->e_ident[EI_VERSION] = EV_CURRENT; | |
244ffee7 | 2221 | |
32090b8e KR |
2222 | for (count = EI_PAD; count < EI_NIDENT; count++) |
2223 | i_ehdrp->e_ident[count] = 0; | |
244ffee7 | 2224 | |
32090b8e KR |
2225 | i_ehdrp->e_type = (abfd->flags & EXEC_P) ? ET_EXEC : ET_REL; |
2226 | switch (bfd_get_arch (abfd)) | |
fce36137 | 2227 | { |
32090b8e KR |
2228 | case bfd_arch_unknown: |
2229 | i_ehdrp->e_machine = EM_NONE; | |
2230 | break; | |
2231 | case bfd_arch_sparc: | |
2232 | i_ehdrp->e_machine = EM_SPARC; | |
2233 | /* start-sanitize-v9 */ | |
2234 | #if ARCH_SIZE == 64 | |
2235 | i_ehdrp->e_machine = EM_SPARC64; | |
2236 | #endif | |
2237 | /* end-sanitize-v9 */ | |
2238 | break; | |
2239 | case bfd_arch_i386: | |
2240 | i_ehdrp->e_machine = EM_386; | |
2241 | break; | |
2242 | case bfd_arch_m68k: | |
2243 | i_ehdrp->e_machine = EM_68K; | |
2244 | break; | |
2245 | case bfd_arch_m88k: | |
2246 | i_ehdrp->e_machine = EM_88K; | |
2247 | break; | |
2248 | case bfd_arch_i860: | |
2249 | i_ehdrp->e_machine = EM_860; | |
2250 | break; | |
2251 | case bfd_arch_mips: /* MIPS Rxxxx */ | |
2252 | i_ehdrp->e_machine = EM_MIPS; /* only MIPS R3000 */ | |
2253 | break; | |
2254 | case bfd_arch_hppa: | |
459ae909 | 2255 | i_ehdrp->e_machine = EM_PARISC; |
32090b8e | 2256 | break; |
99ec1f66 ILT |
2257 | case bfd_arch_powerpc: |
2258 | i_ehdrp->e_machine = EM_CYGNUS_POWERPC; | |
2259 | break; | |
32090b8e KR |
2260 | /* also note that EM_M32, AT&T WE32100 is unknown to bfd */ |
2261 | default: | |
2262 | i_ehdrp->e_machine = EM_NONE; | |
fce36137 | 2263 | } |
32090b8e KR |
2264 | i_ehdrp->e_version = EV_CURRENT; |
2265 | i_ehdrp->e_ehsize = sizeof (Elf_External_Ehdr); | |
244ffee7 | 2266 | |
32090b8e KR |
2267 | /* no program header, for now. */ |
2268 | i_ehdrp->e_phoff = 0; | |
2269 | i_ehdrp->e_phentsize = 0; | |
2270 | i_ehdrp->e_phnum = 0; | |
244ffee7 | 2271 | |
32090b8e KR |
2272 | /* each bfd section is section header entry */ |
2273 | i_ehdrp->e_entry = bfd_get_start_address (abfd); | |
2274 | i_ehdrp->e_shentsize = sizeof (Elf_External_Shdr); | |
244ffee7 | 2275 | |
32090b8e KR |
2276 | /* if we're building an executable, we'll need a program header table */ |
2277 | if (abfd->flags & EXEC_P) | |
244ffee7 | 2278 | { |
300adb31 | 2279 | /* it all happens later */ |
32090b8e KR |
2280 | #if 0 |
2281 | i_ehdrp->e_phentsize = sizeof (Elf_External_Phdr); | |
244ffee7 | 2282 | |
32090b8e KR |
2283 | /* elf_build_phdrs() returns a (NULL-terminated) array of |
2284 | Elf_Internal_Phdrs */ | |
2285 | i_phdrp = elf_build_phdrs (abfd, i_ehdrp, i_shdrp, &i_ehdrp->e_phnum); | |
2286 | i_ehdrp->e_phoff = outbase; | |
2287 | outbase += i_ehdrp->e_phentsize * i_ehdrp->e_phnum; | |
2288 | #endif | |
244ffee7 | 2289 | } |
32090b8e | 2290 | else |
244ffee7 | 2291 | { |
32090b8e KR |
2292 | i_ehdrp->e_phentsize = 0; |
2293 | i_phdrp = 0; | |
2294 | i_ehdrp->e_phoff = 0; | |
244ffee7 JK |
2295 | } |
2296 | ||
32090b8e KR |
2297 | elf_tdata (abfd)->symtab_hdr.sh_name = bfd_add_to_strtab (abfd, shstrtab, |
2298 | ".symtab"); | |
2299 | elf_tdata (abfd)->strtab_hdr.sh_name = bfd_add_to_strtab (abfd, shstrtab, | |
2300 | ".strtab"); | |
2301 | elf_tdata (abfd)->shstrtab_hdr.sh_name = bfd_add_to_strtab (abfd, shstrtab, | |
2302 | ".shstrtab"); | |
6ec3bb6a ILT |
2303 | if (elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1 |
2304 | || elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1 | |
2305 | || elf_tdata (abfd)->shstrtab_hdr.sh_name == (unsigned int) -1) | |
2306 | return false; | |
2307 | ||
f035cc47 | 2308 | return true; |
244ffee7 JK |
2309 | } |
2310 | ||
b9d5cdf0 | 2311 | static boolean |
32090b8e KR |
2312 | swap_out_syms (abfd) |
2313 | bfd *abfd; | |
244ffee7 | 2314 | { |
9783e04a DM |
2315 | if (!elf_map_symbols (abfd)) |
2316 | return false; | |
244ffee7 | 2317 | |
32090b8e KR |
2318 | /* Dump out the symtabs. */ |
2319 | { | |
2320 | int symcount = bfd_get_symcount (abfd); | |
2321 | asymbol **syms = bfd_get_outsymbols (abfd); | |
2322 | struct strtab *stt = bfd_new_strtab (abfd); | |
2323 | Elf_Internal_Shdr *symtab_hdr; | |
2324 | Elf_Internal_Shdr *symstrtab_hdr; | |
2325 | Elf_External_Sym *outbound_syms; | |
2326 | int idx; | |
244ffee7 | 2327 | |
b9d5cdf0 DM |
2328 | if (!stt) |
2329 | return false; | |
32090b8e KR |
2330 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
2331 | symtab_hdr->sh_type = SHT_SYMTAB; | |
2332 | symtab_hdr->sh_entsize = sizeof (Elf_External_Sym); | |
2333 | symtab_hdr->sh_size = symtab_hdr->sh_entsize * (symcount + 1); | |
2334 | symtab_hdr->sh_info = elf_num_locals (abfd) + 1; | |
244ffee7 | 2335 | |
062189c6 ILT |
2336 | /* FIXME: Systems I've checked use 4 byte alignment for .symtab, |
2337 | but it is possible that there are systems which use a different | |
2338 | alignment. */ | |
2339 | symtab_hdr->sh_addralign = 4; | |
2340 | ||
32090b8e KR |
2341 | /* see assert in elf_fake_sections that supports this: */ |
2342 | symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr; | |
2343 | symstrtab_hdr->sh_type = SHT_STRTAB; | |
244ffee7 | 2344 | |
32090b8e KR |
2345 | outbound_syms = (Elf_External_Sym *) |
2346 | bfd_alloc (abfd, (1 + symcount) * sizeof (Elf_External_Sym)); | |
9783e04a DM |
2347 | if (!outbound_syms) |
2348 | { | |
d1ad85a6 | 2349 | bfd_set_error (bfd_error_no_memory); |
9783e04a DM |
2350 | return false; |
2351 | } | |
32090b8e KR |
2352 | /* now generate the data (for "contents") */ |
2353 | { | |
2354 | /* Fill in zeroth symbol and swap it out. */ | |
2355 | Elf_Internal_Sym sym; | |
2356 | sym.st_name = 0; | |
2357 | sym.st_value = 0; | |
2358 | sym.st_size = 0; | |
2359 | sym.st_info = 0; | |
2360 | sym.st_other = 0; | |
2361 | sym.st_shndx = SHN_UNDEF; | |
2362 | elf_swap_symbol_out (abfd, &sym, outbound_syms); | |
244ffee7 | 2363 | } |
32090b8e KR |
2364 | for (idx = 0; idx < symcount; idx++) |
2365 | { | |
2366 | Elf_Internal_Sym sym; | |
2367 | bfd_vma value = syms[idx]->value; | |
244ffee7 | 2368 | |
32090b8e KR |
2369 | if (syms[idx]->flags & BSF_SECTION_SYM) |
2370 | /* Section symbols have no names. */ | |
2371 | sym.st_name = 0; | |
2372 | else | |
6ec3bb6a ILT |
2373 | { |
2374 | sym.st_name = bfd_add_to_strtab (abfd, stt, syms[idx]->name); | |
2375 | if (sym.st_name == (unsigned long) -1) | |
2376 | return false; | |
2377 | } | |
244ffee7 | 2378 | |
32090b8e | 2379 | if (bfd_is_com_section (syms[idx]->section)) |
244ffee7 | 2380 | { |
32090b8e KR |
2381 | /* ELF common symbols put the alignment into the `value' field, |
2382 | and the size into the `size' field. This is backwards from | |
2383 | how BFD handles it, so reverse it here. */ | |
2384 | sym.st_size = value; | |
2385 | /* Should retrieve this from somewhere... */ | |
2386 | sym.st_value = 16; | |
d4fb8fce ILT |
2387 | sym.st_shndx = elf_section_from_bfd_section (abfd, |
2388 | syms[idx]->section); | |
244ffee7 JK |
2389 | } |
2390 | else | |
2391 | { | |
32090b8e | 2392 | asection *sec = syms[idx]->section; |
e74034d8 | 2393 | elf_symbol_type *type_ptr; |
32090b8e | 2394 | int shndx; |
244ffee7 | 2395 | |
32090b8e KR |
2396 | if (sec->output_section) |
2397 | { | |
2398 | value += sec->output_offset; | |
2399 | sec = sec->output_section; | |
2400 | } | |
2401 | value += sec->vma; | |
2402 | sym.st_value = value; | |
e74034d8 KR |
2403 | type_ptr = elf_symbol_from (abfd, syms[idx]); |
2404 | sym.st_size = type_ptr ? type_ptr->internal_elf_sym.st_size : 0; | |
32090b8e KR |
2405 | sym.st_shndx = shndx = elf_section_from_bfd_section (abfd, sec); |
2406 | if (shndx == -1) | |
2407 | { | |
2408 | asection *sec2; | |
2409 | /* Writing this would be a hell of a lot easier if we had | |
2410 | some decent documentation on bfd, and knew what to expect | |
2411 | of the library, and what to demand of applications. For | |
2412 | example, it appears that `objcopy' might not set the | |
2413 | section of a symbol to be a section that is actually in | |
2414 | the output file. */ | |
2415 | sec2 = bfd_get_section_by_name (abfd, sec->name); | |
850584ad | 2416 | BFD_ASSERT (sec2 != 0); |
32090b8e | 2417 | sym.st_shndx = shndx = elf_section_from_bfd_section (abfd, sec2); |
850584ad | 2418 | BFD_ASSERT (shndx != -1); |
32090b8e KR |
2419 | } |
2420 | } | |
244ffee7 | 2421 | |
32090b8e | 2422 | if (bfd_is_com_section (syms[idx]->section)) |
38a5f510 | 2423 | sym.st_info = ELF_ST_INFO (STB_GLOBAL, STT_OBJECT); |
32090b8e KR |
2424 | else if (syms[idx]->section == &bfd_und_section) |
2425 | sym.st_info = ELF_ST_INFO (STB_GLOBAL, STT_NOTYPE); | |
32090b8e KR |
2426 | else if (syms[idx]->flags & BSF_SECTION_SYM) |
2427 | sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION); | |
2428 | else if (syms[idx]->flags & BSF_FILE) | |
2429 | sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE); | |
d24928c0 | 2430 | else |
32090b8e | 2431 | { |
d24928c0 KR |
2432 | int bind = STB_LOCAL; |
2433 | int type = STT_OBJECT; | |
2434 | unsigned int flags = syms[idx]->flags; | |
2435 | ||
2436 | if (flags & BSF_LOCAL) | |
2437 | bind = STB_LOCAL; | |
2438 | else if (flags & BSF_WEAK) | |
2439 | bind = STB_WEAK; | |
2440 | else if (flags & BSF_GLOBAL) | |
2441 | bind = STB_GLOBAL; | |
2442 | ||
2443 | if (flags & BSF_FUNCTION) | |
2444 | type = STT_FUNC; | |
2445 | ||
2446 | sym.st_info = ELF_ST_INFO (bind, type); | |
32090b8e | 2447 | } |
244ffee7 | 2448 | |
32090b8e KR |
2449 | sym.st_other = 0; |
2450 | elf_swap_symbol_out (abfd, &sym, | |
d24928c0 KR |
2451 | (outbound_syms |
2452 | + elf_sym_extra (abfd)[idx].elf_sym_num)); | |
32090b8e KR |
2453 | } |
2454 | ||
2455 | symtab_hdr->contents = (PTR) outbound_syms; | |
2456 | symstrtab_hdr->contents = (PTR) stt->tab; | |
2457 | symstrtab_hdr->sh_size = stt->length; | |
2458 | symstrtab_hdr->sh_type = SHT_STRTAB; | |
2459 | ||
2460 | symstrtab_hdr->sh_flags = 0; | |
2461 | symstrtab_hdr->sh_addr = 0; | |
2462 | symstrtab_hdr->sh_entsize = 0; | |
2463 | symstrtab_hdr->sh_link = 0; | |
2464 | symstrtab_hdr->sh_info = 0; | |
062189c6 | 2465 | symstrtab_hdr->sh_addralign = 1; |
32090b8e KR |
2466 | symstrtab_hdr->size = 0; |
2467 | } | |
2468 | ||
b9d5cdf0 | 2469 | return true; |
244ffee7 JK |
2470 | } |
2471 | ||
32090b8e KR |
2472 | static boolean |
2473 | write_shdrs_and_ehdr (abfd) | |
2474 | bfd *abfd; | |
244ffee7 | 2475 | { |
32090b8e KR |
2476 | Elf_External_Ehdr x_ehdr; /* Elf file header, external form */ |
2477 | Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */ | |
32090b8e KR |
2478 | Elf_External_Shdr *x_shdrp; /* Section header table, external form */ |
2479 | Elf_Internal_Shdr **i_shdrp; /* Section header table, internal form */ | |
68241b2b | 2480 | unsigned int count; |
32090b8e | 2481 | struct strtab *shstrtab; |
244ffee7 | 2482 | |
32090b8e KR |
2483 | i_ehdrp = elf_elfheader (abfd); |
2484 | i_shdrp = elf_elfsections (abfd); | |
2485 | shstrtab = elf_shstrtab (abfd); | |
2486 | ||
2487 | /* swap the header before spitting it out... */ | |
2488 | ||
2489 | #if DEBUG & 1 | |
2490 | elf_debug_file (i_ehdrp); | |
244ffee7 | 2491 | #endif |
32090b8e | 2492 | elf_swap_ehdr_out (abfd, i_ehdrp, &x_ehdr); |
4002f18a ILT |
2493 | if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0 |
2494 | || (bfd_write ((PTR) & x_ehdr, sizeof (x_ehdr), 1, abfd) | |
2495 | != sizeof (x_ehdr))) | |
2496 | return false; | |
244ffee7 | 2497 | |
32090b8e KR |
2498 | /* at this point we've concocted all the ELF sections... */ |
2499 | x_shdrp = (Elf_External_Shdr *) | |
2500 | bfd_alloc (abfd, sizeof (*x_shdrp) * (i_ehdrp->e_shnum)); | |
2501 | if (!x_shdrp) | |
2502 | { | |
d1ad85a6 | 2503 | bfd_set_error (bfd_error_no_memory); |
32090b8e KR |
2504 | return false; |
2505 | } | |
2506 | ||
2507 | for (count = 0; count < i_ehdrp->e_shnum; count++) | |
2508 | { | |
2509 | #if DEBUG & 2 | |
2510 | elf_debug_section (shstrtab->tab + i_shdrp[count]->sh_name, count, | |
2511 | i_shdrp[count]); | |
244ffee7 | 2512 | #endif |
32090b8e KR |
2513 | elf_swap_shdr_out (abfd, i_shdrp[count], x_shdrp + count); |
2514 | } | |
4002f18a ILT |
2515 | if (bfd_seek (abfd, (file_ptr) i_ehdrp->e_shoff, SEEK_SET) != 0 |
2516 | || (bfd_write ((PTR) x_shdrp, sizeof (*x_shdrp), i_ehdrp->e_shnum, abfd) | |
d909628b | 2517 | != sizeof (*x_shdrp) * i_ehdrp->e_shnum)) |
4002f18a ILT |
2518 | return false; |
2519 | ||
32090b8e | 2520 | /* need to dump the string table too... */ |
244ffee7 | 2521 | |
32090b8e KR |
2522 | return true; |
2523 | } | |
244ffee7 | 2524 | |
013dec1a ILT |
2525 | /* Assign file positions for all the reloc sections which are not part |
2526 | of the loadable file image. */ | |
2527 | ||
32090b8e KR |
2528 | static void |
2529 | assign_file_positions_for_relocs (abfd) | |
2530 | bfd *abfd; | |
2531 | { | |
013dec1a | 2532 | file_ptr off; |
68241b2b | 2533 | unsigned int i; |
013dec1a ILT |
2534 | Elf_Internal_Shdr **shdrpp; |
2535 | ||
2536 | off = elf_tdata (abfd)->next_file_pos; | |
2537 | ||
2538 | for (i = 1, shdrpp = elf_elfsections (abfd) + 1; | |
2539 | i < elf_elfheader (abfd)->e_shnum; | |
2540 | i++, shdrpp++) | |
32090b8e | 2541 | { |
013dec1a ILT |
2542 | Elf_Internal_Shdr *shdrp; |
2543 | ||
2544 | shdrp = *shdrpp; | |
2545 | if ((shdrp->sh_type == SHT_REL || shdrp->sh_type == SHT_RELA) | |
2546 | && shdrp->sh_offset == -1) | |
2547 | off = assign_file_position_for_section (shdrp, off, true); | |
32090b8e | 2548 | } |
013dec1a | 2549 | |
1c6042ee | 2550 | elf_tdata (abfd)->next_file_pos = off; |
32090b8e | 2551 | } |
244ffee7 | 2552 | |
32090b8e | 2553 | boolean |
1c6042ee ILT |
2554 | NAME(bfd_elf,write_object_contents) (abfd) |
2555 | bfd *abfd; | |
32090b8e | 2556 | { |
062189c6 | 2557 | struct elf_backend_data *bed = get_elf_backend_data (abfd); |
32090b8e KR |
2558 | Elf_Internal_Ehdr *i_ehdrp; |
2559 | Elf_Internal_Shdr **i_shdrp; | |
68241b2b | 2560 | unsigned int count; |
244ffee7 | 2561 | |
38a5f510 ILT |
2562 | /* We don't know how to write dynamic objects. Specifically, we |
2563 | don't know how to construct the program header. */ | |
2564 | if ((abfd->flags & DYNAMIC) != 0) | |
2565 | { | |
2566 | fprintf (stderr, "Writing ELF dynamic objects is not supported\n"); | |
d1ad85a6 | 2567 | bfd_set_error (bfd_error_wrong_format); |
38a5f510 ILT |
2568 | return false; |
2569 | } | |
2570 | ||
6ec3bb6a ILT |
2571 | if (! abfd->output_has_begun |
2572 | && ! elf_compute_section_file_positions (abfd, | |
2573 | (struct bfd_link_info *) NULL)) | |
2574 | return false; | |
244ffee7 | 2575 | |
32090b8e KR |
2576 | i_shdrp = elf_elfsections (abfd); |
2577 | i_ehdrp = elf_elfheader (abfd); | |
244ffee7 | 2578 | |
32090b8e | 2579 | bfd_map_over_sections (abfd, write_relocs, (PTR) 0); |
32090b8e | 2580 | assign_file_positions_for_relocs (abfd); |
244ffee7 | 2581 | |
32090b8e | 2582 | /* After writing the headers, we need to write the sections too... */ |
062189c6 | 2583 | for (count = 1; count < i_ehdrp->e_shnum; count++) |
e621c5cc | 2584 | { |
e621c5cc ILT |
2585 | if (bed->elf_backend_section_processing) |
2586 | (*bed->elf_backend_section_processing) (abfd, i_shdrp[count]); | |
2587 | if (i_shdrp[count]->contents) | |
2588 | { | |
4002f18a ILT |
2589 | if (bfd_seek (abfd, i_shdrp[count]->sh_offset, SEEK_SET) != 0 |
2590 | || (bfd_write (i_shdrp[count]->contents, i_shdrp[count]->sh_size, | |
2591 | 1, abfd) | |
2592 | != i_shdrp[count]->sh_size)) | |
2593 | return false; | |
e621c5cc ILT |
2594 | } |
2595 | } | |
062189c6 ILT |
2596 | |
2597 | if (bed->elf_backend_final_write_processing) | |
2598 | (*bed->elf_backend_final_write_processing) (abfd); | |
2599 | ||
32090b8e KR |
2600 | return write_shdrs_and_ehdr (abfd); |
2601 | } | |
244ffee7 | 2602 | |
32090b8e KR |
2603 | /* Given an index of a section, retrieve a pointer to it. Note |
2604 | that for our purposes, sections are indexed by {1, 2, ...} with | |
2605 | 0 being an illegal index. */ | |
244ffee7 | 2606 | |
32090b8e KR |
2607 | /* In the original, each ELF section went into exactly one BFD |
2608 | section. This doesn't really make sense, so we need a real mapping. | |
2609 | The mapping has to hide in the Elf_Internal_Shdr since asection | |
2610 | doesn't have anything like a tdata field... */ | |
244ffee7 | 2611 | |
2e03ce18 | 2612 | static asection * |
1c6042ee ILT |
2613 | section_from_elf_index (abfd, index) |
2614 | bfd *abfd; | |
2615 | unsigned int index; | |
32090b8e KR |
2616 | { |
2617 | /* @@ Is bfd_com_section really correct in all the places it could | |
2618 | be returned from this routine? */ | |
244ffee7 | 2619 | |
32090b8e KR |
2620 | if (index == SHN_ABS) |
2621 | return &bfd_com_section; /* not abs? */ | |
2622 | if (index == SHN_COMMON) | |
2623 | return &bfd_com_section; | |
244ffee7 | 2624 | |
32090b8e | 2625 | if (index > elf_elfheader (abfd)->e_shnum) |
2e03ce18 | 2626 | return NULL; |
244ffee7 JK |
2627 | |
2628 | { | |
32090b8e | 2629 | Elf_Internal_Shdr *hdr = elf_elfsections (abfd)[index]; |
244ffee7 | 2630 | |
32090b8e | 2631 | switch (hdr->sh_type) |
244ffee7 | 2632 | { |
32090b8e KR |
2633 | /* ELF sections that map to BFD sections */ |
2634 | case SHT_PROGBITS: | |
2635 | case SHT_NOBITS: | |
013dec1a ILT |
2636 | case SHT_HASH: |
2637 | case SHT_DYNAMIC: | |
2e03ce18 ILT |
2638 | if (hdr->rawdata == NULL) |
2639 | { | |
2640 | if (! bfd_section_from_shdr (abfd, index)) | |
2641 | return NULL; | |
2642 | } | |
32090b8e | 2643 | return (struct sec *) hdr->rawdata; |
244ffee7 | 2644 | |
32090b8e KR |
2645 | default: |
2646 | return (struct sec *) &bfd_abs_section; | |
244ffee7 | 2647 | } |
244ffee7 | 2648 | } |
32090b8e | 2649 | } |
244ffee7 | 2650 | |
32090b8e KR |
2651 | /* given a section, search the header to find them... */ |
2652 | static int | |
1c6042ee ILT |
2653 | elf_section_from_bfd_section (abfd, asect) |
2654 | bfd *abfd; | |
2655 | struct sec *asect; | |
32090b8e KR |
2656 | { |
2657 | Elf_Internal_Shdr **i_shdrp = elf_elfsections (abfd); | |
2658 | int index; | |
2659 | Elf_Internal_Shdr *hdr; | |
2660 | int maxindex = elf_elfheader (abfd)->e_shnum; | |
244ffee7 | 2661 | |
32090b8e KR |
2662 | if (asect == &bfd_abs_section) |
2663 | return SHN_ABS; | |
2664 | if (asect == &bfd_com_section) | |
2665 | return SHN_COMMON; | |
2666 | if (asect == &bfd_und_section) | |
2667 | return SHN_UNDEF; | |
244ffee7 | 2668 | |
32090b8e KR |
2669 | for (index = 0; index < maxindex; index++) |
2670 | { | |
2671 | hdr = i_shdrp[index]; | |
2672 | switch (hdr->sh_type) | |
2673 | { | |
2674 | /* ELF sections that map to BFD sections */ | |
2675 | case SHT_PROGBITS: | |
2676 | case SHT_NOBITS: | |
e621c5cc | 2677 | case SHT_NOTE: |
013dec1a ILT |
2678 | case SHT_HASH: |
2679 | case SHT_DYNAMIC: | |
32090b8e KR |
2680 | if (hdr->rawdata) |
2681 | { | |
2682 | if (((struct sec *) (hdr->rawdata)) == asect) | |
2683 | return index; | |
2684 | } | |
2685 | break; | |
01383fb4 KR |
2686 | |
2687 | case SHT_STRTAB: | |
2688 | /* fix_up_strtabs will generate STRTAB sections with names | |
2689 | of .stab*str. */ | |
2690 | if (!strncmp (asect->name, ".stab", 5) | |
2691 | && !strcmp ("str", asect->name + strlen (asect->name) - 3)) | |
2692 | { | |
2693 | if (hdr->rawdata) | |
2694 | { | |
2695 | if (((struct sec *) (hdr->rawdata)) == asect) | |
2696 | return index; | |
2697 | } | |
2698 | break; | |
2699 | } | |
2700 | /* FALL THROUGH */ | |
32090b8e | 2701 | default: |
e621c5cc ILT |
2702 | { |
2703 | struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
2704 | ||
2705 | if (bed->elf_backend_section_from_bfd_section) | |
f035cc47 ILT |
2706 | { |
2707 | int retval; | |
2708 | ||
2709 | retval = index; | |
2710 | if ((*bed->elf_backend_section_from_bfd_section) | |
2711 | (abfd, hdr, asect, &retval)) | |
2712 | return retval; | |
2713 | } | |
e621c5cc | 2714 | } |
32090b8e KR |
2715 | break; |
2716 | } | |
2717 | } | |
2718 | return -1; | |
2719 | } | |
244ffee7 | 2720 | |
32090b8e KR |
2721 | /* given a symbol, return the bfd index for that symbol. */ |
2722 | static int | |
1c6042ee ILT |
2723 | elf_symbol_from_bfd_symbol (abfd, asym_ptr_ptr) |
2724 | bfd *abfd; | |
2725 | struct symbol_cache_entry **asym_ptr_ptr; | |
32090b8e KR |
2726 | { |
2727 | struct symbol_cache_entry *asym_ptr = *asym_ptr_ptr; | |
32090b8e | 2728 | int idx; |
d24928c0 | 2729 | flagword flags = asym_ptr->flags; |
32090b8e | 2730 | |
d24928c0 KR |
2731 | /* When gas creates relocations against local labels, it creates its |
2732 | own symbol for the section, but does put the symbol into the | |
e621c5cc ILT |
2733 | symbol chain, so udata is 0. When the linker is generating |
2734 | relocatable output, this section symbol may be for one of the | |
2735 | input sections rather than the output section. */ | |
d24928c0 KR |
2736 | if (asym_ptr->udata == (PTR) 0 |
2737 | && (flags & BSF_SECTION_SYM) | |
e621c5cc ILT |
2738 | && asym_ptr->section) |
2739 | { | |
2740 | int indx; | |
2741 | ||
2742 | if (asym_ptr->section->output_section != NULL) | |
2743 | indx = asym_ptr->section->output_section->index; | |
2744 | else | |
2745 | indx = asym_ptr->section->index; | |
2746 | if (elf_section_syms (abfd)[indx]) | |
2747 | asym_ptr->udata = elf_section_syms (abfd)[indx]->udata; | |
01383fb4 | 2748 | } |
e621c5cc | 2749 | |
d24928c0 | 2750 | if (asym_ptr->udata) |
1c6042ee | 2751 | idx = ((Elf_Sym_Extra *) asym_ptr->udata)->elf_sym_num; |
d24928c0 | 2752 | else |
32090b8e | 2753 | { |
32090b8e KR |
2754 | abort (); |
2755 | } | |
244ffee7 | 2756 | |
32090b8e | 2757 | #if DEBUG & 4 |
244ffee7 | 2758 | { |
244ffee7 | 2759 | |
32090b8e | 2760 | fprintf (stderr, |
d24928c0 | 2761 | "elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx %s\n", |
1c6042ee | 2762 | (long) asym_ptr, asym_ptr->name, idx, flags, elf_symbol_flags (flags)); |
32090b8e KR |
2763 | fflush (stderr); |
2764 | } | |
2765 | #endif | |
2766 | ||
2767 | return idx; | |
2768 | } | |
2769 | ||
cb71adf1 PS |
2770 | static long |
2771 | elf_slurp_symbol_table (abfd, symptrs, dynamic) | |
1c6042ee ILT |
2772 | bfd *abfd; |
2773 | asymbol **symptrs; /* Buffer for generated bfd symbols */ | |
cb71adf1 | 2774 | boolean dynamic; |
32090b8e | 2775 | { |
cb71adf1 | 2776 | Elf_Internal_Shdr *hdr; |
7d8aaf36 | 2777 | long symcount; /* Number of external ELF symbols */ |
32090b8e KR |
2778 | elf_symbol_type *sym; /* Pointer to current bfd symbol */ |
2779 | elf_symbol_type *symbase; /* Buffer for generated bfd symbols */ | |
2780 | Elf_Internal_Sym i_sym; | |
80425e6c | 2781 | Elf_External_Sym *x_symp = NULL; |
32090b8e | 2782 | |
32090b8e KR |
2783 | /* Read each raw ELF symbol, converting from external ELF form to |
2784 | internal ELF form, and then using the information to create a | |
2785 | canonical bfd symbol table entry. | |
244ffee7 | 2786 | |
32090b8e KR |
2787 | Note that we allocate the initial bfd canonical symbol buffer |
2788 | based on a one-to-one mapping of the ELF symbols to canonical | |
2789 | symbols. We actually use all the ELF symbols, so there will be no | |
2790 | space left over at the end. When we have all the symbols, we | |
2791 | build the caller's pointer vector. */ | |
244ffee7 | 2792 | |
cb71adf1 PS |
2793 | if (dynamic) |
2794 | hdr = &elf_tdata (abfd)->dynsymtab_hdr; | |
2795 | else | |
2796 | hdr = &elf_tdata (abfd)->symtab_hdr; | |
32090b8e | 2797 | if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) == -1) |
cb71adf1 | 2798 | return -1; |
244ffee7 | 2799 | |
32090b8e | 2800 | symcount = hdr->sh_size / sizeof (Elf_External_Sym); |
244ffee7 | 2801 | |
7d8aaf36 ILT |
2802 | if (symcount == 0) |
2803 | sym = symbase = NULL; | |
2804 | else | |
244ffee7 | 2805 | { |
7d8aaf36 | 2806 | long i; |
244ffee7 | 2807 | |
7d8aaf36 | 2808 | if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) == -1) |
cb71adf1 | 2809 | return -1; |
7d8aaf36 ILT |
2810 | |
2811 | symbase = ((elf_symbol_type *) | |
2812 | bfd_zalloc (abfd, symcount * sizeof (elf_symbol_type))); | |
2813 | if (symbase == (elf_symbol_type *) NULL) | |
32090b8e | 2814 | { |
7d8aaf36 | 2815 | bfd_set_error (bfd_error_no_memory); |
cb71adf1 | 2816 | return -1; |
32090b8e | 2817 | } |
7d8aaf36 ILT |
2818 | sym = symbase; |
2819 | ||
2820 | /* Temporarily allocate room for the raw ELF symbols. */ | |
2821 | x_symp = ((Elf_External_Sym *) | |
80425e6c | 2822 | malloc (symcount * sizeof (Elf_External_Sym))); |
25057836 | 2823 | if (x_symp == NULL && symcount != 0) |
80425e6c JK |
2824 | { |
2825 | bfd_set_error (bfd_error_no_memory); | |
2826 | goto error_return; | |
2827 | } | |
7d8aaf36 ILT |
2828 | |
2829 | if (bfd_read ((PTR) x_symp, sizeof (Elf_External_Sym), symcount, abfd) | |
2830 | != symcount * sizeof (Elf_External_Sym)) | |
25057836 | 2831 | goto error_return; |
7d8aaf36 ILT |
2832 | /* Skip first symbol, which is a null dummy. */ |
2833 | for (i = 1; i < symcount; i++) | |
32090b8e | 2834 | { |
7d8aaf36 ILT |
2835 | elf_swap_symbol_in (abfd, x_symp + i, &i_sym); |
2836 | memcpy (&sym->internal_elf_sym, &i_sym, sizeof (Elf_Internal_Sym)); | |
2837 | #ifdef ELF_KEEP_EXTSYM | |
2838 | memcpy (&sym->native_elf_sym, x_symp + i, sizeof (Elf_External_Sym)); | |
2839 | #endif | |
2840 | sym->symbol.the_bfd = abfd; | |
244ffee7 | 2841 | |
7d8aaf36 ILT |
2842 | sym->symbol.name = elf_string_from_elf_section (abfd, hdr->sh_link, |
2843 | i_sym.st_name); | |
244ffee7 | 2844 | |
7d8aaf36 | 2845 | sym->symbol.value = i_sym.st_value; |
244ffee7 | 2846 | |
6ec3bb6a | 2847 | if (i_sym.st_shndx > 0 && i_sym.st_shndx < SHN_LORESERVE) |
7d8aaf36 ILT |
2848 | { |
2849 | sym->symbol.section = section_from_elf_index (abfd, | |
2850 | i_sym.st_shndx); | |
2e03ce18 | 2851 | if (sym->symbol.section == NULL) |
013dec1a ILT |
2852 | { |
2853 | /* This symbol is in a section for which we did not | |
2854 | create a BFD section. Just use bfd_abs_section, | |
2855 | although it is wrong. FIXME. */ | |
2856 | sym->symbol.section = &bfd_abs_section; | |
2857 | } | |
7d8aaf36 ILT |
2858 | } |
2859 | else if (i_sym.st_shndx == SHN_ABS) | |
2860 | { | |
2861 | sym->symbol.section = &bfd_abs_section; | |
2862 | } | |
2863 | else if (i_sym.st_shndx == SHN_COMMON) | |
2864 | { | |
2865 | sym->symbol.section = &bfd_com_section; | |
2866 | /* Elf puts the alignment into the `value' field, and | |
2867 | the size into the `size' field. BFD wants to see the | |
2868 | size in the value field, and doesn't care (at the | |
2869 | moment) about the alignment. */ | |
2870 | sym->symbol.value = i_sym.st_size; | |
2871 | } | |
2872 | else if (i_sym.st_shndx == SHN_UNDEF) | |
2873 | { | |
2874 | sym->symbol.section = &bfd_und_section; | |
2875 | } | |
2876 | else | |
2877 | sym->symbol.section = &bfd_abs_section; | |
300adb31 | 2878 | |
7d8aaf36 | 2879 | sym->symbol.value -= sym->symbol.section->vma; |
244ffee7 | 2880 | |
7d8aaf36 ILT |
2881 | switch (ELF_ST_BIND (i_sym.st_info)) |
2882 | { | |
2883 | case STB_LOCAL: | |
2884 | sym->symbol.flags |= BSF_LOCAL; | |
2885 | break; | |
2886 | case STB_GLOBAL: | |
2887 | sym->symbol.flags |= BSF_GLOBAL; | |
2888 | break; | |
2889 | case STB_WEAK: | |
2890 | sym->symbol.flags |= BSF_WEAK; | |
2891 | break; | |
2892 | } | |
2893 | ||
2894 | switch (ELF_ST_TYPE (i_sym.st_info)) | |
2895 | { | |
2896 | case STT_SECTION: | |
2897 | sym->symbol.flags |= BSF_SECTION_SYM | BSF_DEBUGGING; | |
2898 | break; | |
2899 | case STT_FILE: | |
2900 | sym->symbol.flags |= BSF_FILE | BSF_DEBUGGING; | |
2901 | break; | |
2902 | case STT_FUNC: | |
2903 | sym->symbol.flags |= BSF_FUNCTION; | |
2904 | break; | |
2905 | } | |
2906 | ||
cb71adf1 PS |
2907 | if (dynamic) |
2908 | sym->symbol.flags |= BSF_DYNAMIC; | |
2909 | ||
7d8aaf36 ILT |
2910 | /* Do some backend-specific processing on this symbol. */ |
2911 | { | |
2912 | struct elf_backend_data *ebd = get_elf_backend_data (abfd); | |
2913 | if (ebd->elf_backend_symbol_processing) | |
2914 | (*ebd->elf_backend_symbol_processing) (abfd, &sym->symbol); | |
2915 | } | |
2916 | ||
2917 | sym++; | |
2918 | } | |
244ffee7 JK |
2919 | } |
2920 | ||
e621c5cc ILT |
2921 | /* Do some backend-specific processing on this symbol table. */ |
2922 | { | |
2923 | struct elf_backend_data *ebd = get_elf_backend_data (abfd); | |
2924 | if (ebd->elf_backend_symbol_table_processing) | |
2925 | (*ebd->elf_backend_symbol_table_processing) (abfd, symbase, symcount); | |
2926 | } | |
244ffee7 | 2927 | |
e621c5cc | 2928 | /* We rely on the zalloc to clear out the final symbol entry. */ |
244ffee7 | 2929 | |
cb71adf1 | 2930 | symcount = sym - symbase; |
32090b8e KR |
2931 | |
2932 | /* Fill in the user's symbol pointer vector if needed. */ | |
2933 | if (symptrs) | |
244ffee7 | 2934 | { |
cb71adf1 PS |
2935 | long l = symcount; |
2936 | ||
32090b8e | 2937 | sym = symbase; |
cb71adf1 | 2938 | while (l-- > 0) |
244ffee7 | 2939 | { |
32090b8e KR |
2940 | *symptrs++ = &sym->symbol; |
2941 | sym++; | |
244ffee7 | 2942 | } |
32090b8e | 2943 | *symptrs = 0; /* Final null pointer */ |
244ffee7 JK |
2944 | } |
2945 | ||
80425e6c JK |
2946 | if (x_symp != NULL) |
2947 | free (x_symp); | |
cb71adf1 | 2948 | return symcount; |
1c6042ee | 2949 | error_return: |
80425e6c JK |
2950 | if (x_symp != NULL) |
2951 | free (x_symp); | |
cb71adf1 | 2952 | return -1; |
244ffee7 JK |
2953 | } |
2954 | ||
32090b8e | 2955 | /* Return the number of bytes required to hold the symtab vector. |
244ffee7 | 2956 | |
32090b8e KR |
2957 | Note that we base it on the count plus 1, since we will null terminate |
2958 | the vector allocated based on this size. However, the ELF symbol table | |
2959 | always has a dummy entry as symbol #0, so it ends up even. */ | |
244ffee7 | 2960 | |
326e32d7 | 2961 | long |
1c6042ee ILT |
2962 | elf_get_symtab_upper_bound (abfd) |
2963 | bfd *abfd; | |
244ffee7 | 2964 | { |
326e32d7 ILT |
2965 | long symcount; |
2966 | long symtab_size; | |
1c6042ee | 2967 | Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->symtab_hdr; |
326e32d7 | 2968 | |
32090b8e | 2969 | symcount = hdr->sh_size / sizeof (Elf_External_Sym); |
d6439785 | 2970 | symtab_size = (symcount - 1 + 1) * (sizeof (asymbol *)); |
244ffee7 | 2971 | |
32090b8e KR |
2972 | return symtab_size; |
2973 | } | |
244ffee7 | 2974 | |
cb71adf1 PS |
2975 | long |
2976 | elf_get_dynamic_symtab_upper_bound (abfd) | |
2977 | bfd *abfd; | |
2978 | { | |
2979 | long symcount; | |
2980 | long symtab_size; | |
2981 | Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->dynsymtab_hdr; | |
2982 | ||
2983 | symcount = hdr->sh_size / sizeof (Elf_External_Sym); | |
2984 | symtab_size = (symcount - 1 + 1) * (sizeof (asymbol *)); | |
2985 | ||
2986 | return symtab_size; | |
2987 | } | |
2988 | ||
32090b8e KR |
2989 | /* |
2990 | This function return the number of bytes required to store the | |
2991 | relocation information associated with section <<sect>> | |
2992 | attached to bfd <<abfd>> | |
244ffee7 | 2993 | |
32090b8e | 2994 | */ |
326e32d7 | 2995 | long |
32090b8e KR |
2996 | elf_get_reloc_upper_bound (abfd, asect) |
2997 | bfd *abfd; | |
2998 | sec_ptr asect; | |
2999 | { | |
3000 | if (asect->flags & SEC_RELOC) | |
3001 | { | |
3002 | /* either rel or rela */ | |
1c6042ee | 3003 | return elf_section_data (asect)->rel_hdr.sh_size; |
32090b8e KR |
3004 | } |
3005 | else | |
3006 | return 0; | |
244ffee7 JK |
3007 | } |
3008 | ||
32090b8e | 3009 | static boolean |
1c6042ee ILT |
3010 | elf_slurp_reloca_table (abfd, asect, symbols) |
3011 | bfd *abfd; | |
3012 | sec_ptr asect; | |
3013 | asymbol **symbols; | |
244ffee7 | 3014 | { |
32090b8e KR |
3015 | Elf_External_Rela *native_relocs; |
3016 | arelent *reloc_cache; | |
3017 | arelent *cache_ptr; | |
244ffee7 | 3018 | |
32090b8e | 3019 | unsigned int idx; |
244ffee7 | 3020 | |
32090b8e KR |
3021 | if (asect->relocation) |
3022 | return true; | |
3023 | if (asect->reloc_count == 0) | |
3024 | return true; | |
3025 | if (asect->flags & SEC_CONSTRUCTOR) | |
3026 | return true; | |
244ffee7 | 3027 | |
4002f18a ILT |
3028 | if (bfd_seek (abfd, asect->rel_filepos, SEEK_SET) != 0) |
3029 | return false; | |
32090b8e KR |
3030 | native_relocs = (Elf_External_Rela *) |
3031 | bfd_alloc (abfd, asect->reloc_count * sizeof (Elf_External_Rela)); | |
9783e04a | 3032 | if (!native_relocs) |
9783e04a | 3033 | { |
d1ad85a6 | 3034 | bfd_set_error (bfd_error_no_memory); |
9783e04a DM |
3035 | return false; |
3036 | } | |
4002f18a ILT |
3037 | if (bfd_read ((PTR) native_relocs, |
3038 | sizeof (Elf_External_Rela), asect->reloc_count, abfd) | |
3039 | != sizeof (Elf_External_Rela) * asect->reloc_count) | |
3040 | return false; | |
244ffee7 | 3041 | |
32090b8e KR |
3042 | reloc_cache = (arelent *) |
3043 | bfd_alloc (abfd, (size_t) (asect->reloc_count * sizeof (arelent))); | |
3044 | ||
3045 | if (!reloc_cache) | |
6a3eb9b6 | 3046 | { |
d1ad85a6 | 3047 | bfd_set_error (bfd_error_no_memory); |
32090b8e | 3048 | return false; |
6a3eb9b6 | 3049 | } |
244ffee7 | 3050 | |
32090b8e KR |
3051 | for (idx = 0; idx < asect->reloc_count; idx++) |
3052 | { | |
32090b8e KR |
3053 | Elf_Internal_Rela dst; |
3054 | Elf_External_Rela *src; | |
244ffee7 | 3055 | |
32090b8e KR |
3056 | cache_ptr = reloc_cache + idx; |
3057 | src = native_relocs + idx; | |
3058 | elf_swap_reloca_in (abfd, src, &dst); | |
244ffee7 | 3059 | |
d24928c0 | 3060 | #ifdef RELOC_PROCESSING |
32090b8e KR |
3061 | RELOC_PROCESSING (cache_ptr, &dst, symbols, abfd, asect); |
3062 | #else | |
32090b8e KR |
3063 | if (asect->flags & SEC_RELOC) |
3064 | { | |
3065 | /* relocatable, so the offset is off of the section */ | |
3066 | cache_ptr->address = dst.r_offset + asect->vma; | |
3067 | } | |
3068 | else | |
3069 | { | |
3070 | /* non-relocatable, so the offset a virtual address */ | |
3071 | cache_ptr->address = dst.r_offset; | |
3072 | } | |
7b8106b4 ILT |
3073 | |
3074 | /* ELF_R_SYM(dst.r_info) is the symbol table offset. An offset | |
3075 | of zero points to the dummy symbol, which was not read into | |
3076 | the symbol table SYMBOLS. */ | |
3077 | if (ELF_R_SYM (dst.r_info) == 0) | |
3078 | cache_ptr->sym_ptr_ptr = bfd_abs_section.symbol_ptr_ptr; | |
3079 | else | |
3080 | { | |
3081 | asymbol *s; | |
3082 | ||
3083 | cache_ptr->sym_ptr_ptr = symbols + ELF_R_SYM (dst.r_info) - 1; | |
3084 | ||
3085 | /* Translate any ELF section symbol into a BFD section | |
3086 | symbol. */ | |
3087 | s = *(cache_ptr->sym_ptr_ptr); | |
3088 | if (s->flags & BSF_SECTION_SYM) | |
3089 | { | |
3090 | cache_ptr->sym_ptr_ptr = s->section->symbol_ptr_ptr; | |
3091 | s = *cache_ptr->sym_ptr_ptr; | |
3092 | if (s->name == 0 || s->name[0] == 0) | |
3093 | abort (); | |
3094 | } | |
3095 | } | |
32090b8e | 3096 | cache_ptr->addend = dst.r_addend; |
244ffee7 | 3097 | |
32090b8e KR |
3098 | /* Fill in the cache_ptr->howto field from dst.r_type */ |
3099 | { | |
3100 | struct elf_backend_data *ebd = get_elf_backend_data (abfd); | |
3101 | (*ebd->elf_info_to_howto) (abfd, cache_ptr, &dst); | |
3102 | } | |
3103 | #endif | |
3104 | } | |
244ffee7 | 3105 | |
32090b8e KR |
3106 | asect->relocation = reloc_cache; |
3107 | return true; | |
3108 | } | |
238ac6ec | 3109 | |
32090b8e KR |
3110 | #ifdef DEBUG |
3111 | static void | |
3112 | elf_debug_section (str, num, hdr) | |
3113 | char *str; | |
3114 | int num; | |
3115 | Elf_Internal_Shdr *hdr; | |
3116 | { | |
3117 | fprintf (stderr, "\nSection#%d '%s' 0x%.8lx\n", num, str, (long) hdr); | |
3118 | fprintf (stderr, | |
3119 | "sh_name = %ld\tsh_type = %ld\tsh_flags = %ld\n", | |
3120 | (long) hdr->sh_name, | |
3121 | (long) hdr->sh_type, | |
3122 | (long) hdr->sh_flags); | |
3123 | fprintf (stderr, | |
3124 | "sh_addr = %ld\tsh_offset = %ld\tsh_size = %ld\n", | |
3125 | (long) hdr->sh_addr, | |
3126 | (long) hdr->sh_offset, | |
3127 | (long) hdr->sh_size); | |
3128 | fprintf (stderr, | |
3129 | "sh_link = %ld\tsh_info = %ld\tsh_addralign = %ld\n", | |
3130 | (long) hdr->sh_link, | |
3131 | (long) hdr->sh_info, | |
3132 | (long) hdr->sh_addralign); | |
3133 | fprintf (stderr, "sh_entsize = %ld\n", | |
3134 | (long) hdr->sh_entsize); | |
3135 | fprintf (stderr, "rawdata = 0x%.8lx\n", (long) hdr->rawdata); | |
3136 | fprintf (stderr, "contents = 0x%.8lx\n", (long) hdr->contents); | |
3137 | fprintf (stderr, "size = %ld\n", (long) hdr->size); | |
3138 | fflush (stderr); | |
3139 | } | |
244ffee7 | 3140 | |
32090b8e KR |
3141 | static void |
3142 | elf_debug_file (ehdrp) | |
3143 | Elf_Internal_Ehdr *ehdrp; | |
3144 | { | |
3145 | fprintf (stderr, "e_entry = 0x%.8lx\n", (long) ehdrp->e_entry); | |
3146 | fprintf (stderr, "e_phoff = %ld\n", (long) ehdrp->e_phoff); | |
3147 | fprintf (stderr, "e_phnum = %ld\n", (long) ehdrp->e_phnum); | |
3148 | fprintf (stderr, "e_phentsize = %ld\n", (long) ehdrp->e_phentsize); | |
3149 | fprintf (stderr, "e_shoff = %ld\n", (long) ehdrp->e_shoff); | |
3150 | fprintf (stderr, "e_shnum = %ld\n", (long) ehdrp->e_shnum); | |
3151 | fprintf (stderr, "e_shentsize = %ld\n", (long) ehdrp->e_shentsize); | |
244ffee7 | 3152 | } |
32090b8e | 3153 | #endif |
244ffee7 JK |
3154 | |
3155 | static boolean | |
1c6042ee ILT |
3156 | elf_slurp_reloc_table (abfd, asect, symbols) |
3157 | bfd *abfd; | |
3158 | sec_ptr asect; | |
3159 | asymbol **symbols; | |
244ffee7 | 3160 | { |
32090b8e KR |
3161 | Elf_External_Rel *native_relocs; |
3162 | arelent *reloc_cache; | |
3163 | arelent *cache_ptr; | |
3164 | Elf_Internal_Shdr *data_hdr; | |
25677b5b PS |
3165 | bfd_vma data_off; |
3166 | unsigned long data_max; | |
32090b8e | 3167 | char buf[4]; /* FIXME -- might be elf64 */ |
244ffee7 | 3168 | |
32090b8e | 3169 | unsigned int idx; |
244ffee7 | 3170 | |
32090b8e KR |
3171 | if (asect->relocation) |
3172 | return true; | |
3173 | if (asect->reloc_count == 0) | |
3174 | return true; | |
3175 | if (asect->flags & SEC_CONSTRUCTOR) | |
3176 | return true; | |
244ffee7 | 3177 | |
4002f18a ILT |
3178 | if (bfd_seek (abfd, asect->rel_filepos, SEEK_SET) != 0) |
3179 | return false; | |
32090b8e KR |
3180 | native_relocs = (Elf_External_Rel *) |
3181 | bfd_alloc (abfd, asect->reloc_count * sizeof (Elf_External_Rel)); | |
9783e04a DM |
3182 | if (!native_relocs) |
3183 | { | |
d1ad85a6 | 3184 | bfd_set_error (bfd_error_no_memory); |
9783e04a DM |
3185 | return false; |
3186 | } | |
4002f18a ILT |
3187 | if (bfd_read ((PTR) native_relocs, |
3188 | sizeof (Elf_External_Rel), asect->reloc_count, abfd) | |
3189 | != sizeof (Elf_External_Rel) * asect->reloc_count) | |
3190 | return false; | |
244ffee7 | 3191 | |
32090b8e KR |
3192 | reloc_cache = (arelent *) |
3193 | bfd_alloc (abfd, (size_t) (asect->reloc_count * sizeof (arelent))); | |
3194 | ||
3195 | if (!reloc_cache) | |
244ffee7 | 3196 | { |
d1ad85a6 | 3197 | bfd_set_error (bfd_error_no_memory); |
244ffee7 JK |
3198 | return false; |
3199 | } | |
3200 | ||
32090b8e KR |
3201 | /* Get the offset of the start of the segment we are relocating to read in |
3202 | the implicit addend. */ | |
1c6042ee | 3203 | data_hdr = &elf_section_data (asect)->this_hdr; |
32090b8e KR |
3204 | data_off = data_hdr->sh_offset; |
3205 | data_max = data_hdr->sh_size - sizeof (buf) + 1; | |
244ffee7 | 3206 | |
32090b8e KR |
3207 | #if DEBUG & 2 |
3208 | elf_debug_section ("data section", -1, data_hdr); | |
3209 | #endif | |
244ffee7 | 3210 | |
32090b8e | 3211 | for (idx = 0; idx < asect->reloc_count; idx++) |
244ffee7 | 3212 | { |
32090b8e KR |
3213 | #ifdef RELOC_PROCESSING |
3214 | Elf_Internal_Rel dst; | |
3215 | Elf_External_Rel *src; | |
244ffee7 | 3216 | |
32090b8e KR |
3217 | cache_ptr = reloc_cache + idx; |
3218 | src = native_relocs + idx; | |
3219 | elf_swap_reloc_in (abfd, src, &dst); | |
244ffee7 | 3220 | |
32090b8e KR |
3221 | RELOC_PROCESSING (cache_ptr, &dst, symbols, abfd, asect); |
3222 | #else | |
3223 | Elf_Internal_Rel dst; | |
3224 | Elf_External_Rel *src; | |
6a3eb9b6 | 3225 | |
32090b8e KR |
3226 | cache_ptr = reloc_cache + idx; |
3227 | src = native_relocs + idx; | |
3228 | ||
3229 | elf_swap_reloc_in (abfd, src, &dst); | |
3230 | ||
3231 | if (asect->flags & SEC_RELOC) | |
244ffee7 | 3232 | { |
32090b8e KR |
3233 | /* relocatable, so the offset is off of the section */ |
3234 | cache_ptr->address = dst.r_offset + asect->vma; | |
244ffee7 | 3235 | } |
32090b8e | 3236 | else |
244ffee7 | 3237 | { |
32090b8e KR |
3238 | /* non-relocatable, so the offset a virtual address */ |
3239 | cache_ptr->address = dst.r_offset; | |
244ffee7 | 3240 | } |
7b8106b4 ILT |
3241 | |
3242 | /* ELF_R_SYM(dst.r_info) is the symbol table offset. An offset | |
3243 | of zero points to the dummy symbol, which was not read into | |
3244 | the symbol table SYMBOLS. */ | |
3245 | if (ELF_R_SYM (dst.r_info) == 0) | |
3246 | cache_ptr->sym_ptr_ptr = bfd_abs_section.symbol_ptr_ptr; | |
3247 | else | |
3248 | { | |
3249 | asymbol *s; | |
3250 | ||
3251 | cache_ptr->sym_ptr_ptr = symbols + ELF_R_SYM (dst.r_info) - 1; | |
3252 | ||
3253 | /* Translate any ELF section symbol into a BFD section | |
3254 | symbol. */ | |
3255 | s = *(cache_ptr->sym_ptr_ptr); | |
3256 | if (s->flags & BSF_SECTION_SYM) | |
3257 | { | |
3258 | cache_ptr->sym_ptr_ptr = s->section->symbol_ptr_ptr; | |
3259 | s = *cache_ptr->sym_ptr_ptr; | |
3260 | if (s->name == 0 || s->name[0] == 0) | |
3261 | abort (); | |
3262 | } | |
3263 | } | |
32090b8e | 3264 | BFD_ASSERT (dst.r_offset <= data_max); |
d24928c0 | 3265 | cache_ptr->addend = 0; |
244ffee7 | 3266 | |
32090b8e KR |
3267 | /* Fill in the cache_ptr->howto field from dst.r_type */ |
3268 | { | |
3269 | struct elf_backend_data *ebd = get_elf_backend_data (abfd); | |
3270 | (*ebd->elf_info_to_howto_rel) (abfd, cache_ptr, &dst); | |
3271 | } | |
3272 | #endif | |
3273 | } | |
244ffee7 | 3274 | |
32090b8e KR |
3275 | asect->relocation = reloc_cache; |
3276 | return true; | |
3277 | } | |
244ffee7 | 3278 | |
326e32d7 | 3279 | long |
32090b8e KR |
3280 | elf_canonicalize_reloc (abfd, section, relptr, symbols) |
3281 | bfd *abfd; | |
3282 | sec_ptr section; | |
3283 | arelent **relptr; | |
3284 | asymbol **symbols; | |
3285 | { | |
3286 | arelent *tblptr = section->relocation; | |
3287 | unsigned int count = 0; | |
3288 | int use_rela_p = get_elf_backend_data (abfd)->use_rela_p; | |
3289 | ||
3290 | /* snarfed from coffcode.h */ | |
3291 | if (use_rela_p) | |
326e32d7 ILT |
3292 | { |
3293 | if (! elf_slurp_reloca_table (abfd, section, symbols)) | |
3294 | return -1; | |
3295 | } | |
32090b8e | 3296 | else |
326e32d7 ILT |
3297 | { |
3298 | if (! elf_slurp_reloc_table (abfd, section, symbols)) | |
3299 | return -1; | |
3300 | } | |
32090b8e KR |
3301 | |
3302 | tblptr = section->relocation; | |
32090b8e KR |
3303 | |
3304 | for (; count++ < section->reloc_count;) | |
3305 | *relptr++ = tblptr++; | |
3306 | ||
3307 | *relptr = 0; | |
3308 | return section->reloc_count; | |
3309 | } | |
3310 | ||
326e32d7 | 3311 | long |
1c6042ee ILT |
3312 | elf_get_symtab (abfd, alocation) |
3313 | bfd *abfd; | |
3314 | asymbol **alocation; | |
32090b8e | 3315 | { |
cb71adf1 PS |
3316 | long symcount = elf_slurp_symbol_table (abfd, alocation, false); |
3317 | ||
3318 | if (symcount >= 0) | |
3319 | bfd_get_symcount (abfd) = symcount; | |
3320 | return symcount; | |
3321 | } | |
326e32d7 | 3322 | |
cb71adf1 PS |
3323 | long |
3324 | elf_canonicalize_dynamic_symtab (abfd, alocation) | |
3325 | bfd *abfd; | |
3326 | asymbol **alocation; | |
3327 | { | |
3328 | return elf_slurp_symbol_table (abfd, alocation, true); | |
32090b8e KR |
3329 | } |
3330 | ||
3331 | asymbol * | |
1c6042ee ILT |
3332 | elf_make_empty_symbol (abfd) |
3333 | bfd *abfd; | |
32090b8e KR |
3334 | { |
3335 | elf_symbol_type *newsym; | |
3336 | ||
3337 | newsym = (elf_symbol_type *) bfd_zalloc (abfd, sizeof (elf_symbol_type)); | |
3338 | if (!newsym) | |
3339 | { | |
d1ad85a6 | 3340 | bfd_set_error (bfd_error_no_memory); |
32090b8e KR |
3341 | return NULL; |
3342 | } | |
3343 | else | |
3344 | { | |
3345 | newsym->symbol.the_bfd = abfd; | |
3346 | return &newsym->symbol; | |
244ffee7 | 3347 | } |
32090b8e | 3348 | } |
244ffee7 | 3349 | |
32090b8e | 3350 | void |
1c6042ee ILT |
3351 | elf_get_symbol_info (ignore_abfd, symbol, ret) |
3352 | bfd *ignore_abfd; | |
3353 | asymbol *symbol; | |
3354 | symbol_info *ret; | |
32090b8e KR |
3355 | { |
3356 | bfd_symbol_info (symbol, ret); | |
3357 | } | |
244ffee7 | 3358 | |
32090b8e | 3359 | void |
1c6042ee ILT |
3360 | elf_print_symbol (ignore_abfd, filep, symbol, how) |
3361 | bfd *ignore_abfd; | |
3362 | PTR filep; | |
3363 | asymbol *symbol; | |
3364 | bfd_print_symbol_type how; | |
32090b8e KR |
3365 | { |
3366 | FILE *file = (FILE *) filep; | |
3367 | switch (how) | |
3368 | { | |
3369 | case bfd_print_symbol_name: | |
3370 | fprintf (file, "%s", symbol->name); | |
3371 | break; | |
3372 | case bfd_print_symbol_more: | |
3373 | fprintf (file, "elf "); | |
3374 | fprintf_vma (file, symbol->value); | |
3375 | fprintf (file, " %lx", (long) symbol->flags); | |
3376 | break; | |
3377 | case bfd_print_symbol_all: | |
3378 | { | |
3379 | CONST char *section_name; | |
3380 | section_name = symbol->section ? symbol->section->name : "(*none*)"; | |
3381 | bfd_print_symbol_vandf ((PTR) file, symbol); | |
3382 | fprintf (file, " %s\t%s", | |
3383 | section_name, | |
3384 | symbol->name); | |
3385 | } | |
3386 | break; | |
3387 | } | |
244ffee7 | 3388 | |
32090b8e | 3389 | } |
244ffee7 | 3390 | |
32090b8e | 3391 | alent * |
1c6042ee ILT |
3392 | elf_get_lineno (ignore_abfd, symbol) |
3393 | bfd *ignore_abfd; | |
3394 | asymbol *symbol; | |
32090b8e KR |
3395 | { |
3396 | fprintf (stderr, "elf_get_lineno unimplemented\n"); | |
3397 | fflush (stderr); | |
3398 | BFD_FAIL (); | |
3399 | return NULL; | |
3400 | } | |
3401 | ||
3402 | boolean | |
1c6042ee ILT |
3403 | elf_set_arch_mach (abfd, arch, machine) |
3404 | bfd *abfd; | |
3405 | enum bfd_architecture arch; | |
3406 | unsigned long machine; | |
32090b8e | 3407 | { |
80a903c9 ILT |
3408 | /* If this isn't the right architecture for this backend, and this |
3409 | isn't the generic backend, fail. */ | |
3410 | if (arch != get_elf_backend_data (abfd)->arch | |
3411 | && arch != bfd_arch_unknown | |
3412 | && get_elf_backend_data (abfd)->arch != bfd_arch_unknown) | |
3413 | return false; | |
3414 | ||
3415 | return bfd_default_set_arch_mach (abfd, arch, machine); | |
32090b8e | 3416 | } |
244ffee7 | 3417 | |
32090b8e | 3418 | boolean |
1c6042ee ILT |
3419 | elf_find_nearest_line (abfd, |
3420 | section, | |
3421 | symbols, | |
3422 | offset, | |
3423 | filename_ptr, | |
3424 | functionname_ptr, | |
3425 | line_ptr) | |
3426 | bfd *abfd; | |
3427 | asection *section; | |
3428 | asymbol **symbols; | |
3429 | bfd_vma offset; | |
3430 | CONST char **filename_ptr; | |
3431 | CONST char **functionname_ptr; | |
3432 | unsigned int *line_ptr; | |
32090b8e KR |
3433 | { |
3434 | return false; | |
244ffee7 JK |
3435 | } |
3436 | ||
32090b8e | 3437 | int |
1c6042ee ILT |
3438 | elf_sizeof_headers (abfd, reloc) |
3439 | bfd *abfd; | |
3440 | boolean reloc; | |
32090b8e | 3441 | { |
013dec1a ILT |
3442 | int ret; |
3443 | ||
3444 | ret = sizeof (Elf_External_Ehdr); | |
3445 | if (! reloc) | |
3446 | ret += get_program_header_size (abfd); | |
3447 | return ret; | |
32090b8e | 3448 | } |
244ffee7 | 3449 | |
32090b8e | 3450 | boolean |
1c6042ee ILT |
3451 | elf_set_section_contents (abfd, section, location, offset, count) |
3452 | bfd *abfd; | |
3453 | sec_ptr section; | |
3454 | PTR location; | |
3455 | file_ptr offset; | |
3456 | bfd_size_type count; | |
244ffee7 | 3457 | { |
244ffee7 JK |
3458 | Elf_Internal_Shdr *hdr; |
3459 | ||
6ec3bb6a ILT |
3460 | if (! abfd->output_has_begun |
3461 | && ! elf_compute_section_file_positions (abfd, | |
3462 | (struct bfd_link_info *) NULL)) | |
3463 | return false; | |
244ffee7 | 3464 | |
1c6042ee | 3465 | hdr = &elf_section_data (section)->this_hdr; |
244ffee7 | 3466 | |
32090b8e KR |
3467 | if (bfd_seek (abfd, hdr->sh_offset + offset, SEEK_SET) == -1) |
3468 | return false; | |
3469 | if (bfd_write (location, 1, count, abfd) != count) | |
3470 | return false; | |
3471 | ||
3472 | return true; | |
3473 | } | |
3474 | ||
3475 | void | |
1c6042ee ILT |
3476 | elf_no_info_to_howto (abfd, cache_ptr, dst) |
3477 | bfd *abfd; | |
3478 | arelent *cache_ptr; | |
3479 | Elf_Internal_Rela *dst; | |
244ffee7 | 3480 | { |
32090b8e KR |
3481 | fprintf (stderr, "elf RELA relocation support for target machine unimplemented\n"); |
3482 | fflush (stderr); | |
3483 | BFD_FAIL (); | |
244ffee7 JK |
3484 | } |
3485 | ||
32090b8e | 3486 | void |
1c6042ee ILT |
3487 | elf_no_info_to_howto_rel (abfd, cache_ptr, dst) |
3488 | bfd *abfd; | |
3489 | arelent *cache_ptr; | |
3490 | Elf_Internal_Rel *dst; | |
244ffee7 | 3491 | { |
32090b8e KR |
3492 | fprintf (stderr, "elf REL relocation support for target machine unimplemented\n"); |
3493 | fflush (stderr); | |
3494 | BFD_FAIL (); | |
3495 | } | |
32090b8e | 3496 | \f |
1c6042ee | 3497 | |
32090b8e | 3498 | /* Core file support */ |
244ffee7 | 3499 | |
32090b8e KR |
3500 | #ifdef HAVE_PROCFS /* Some core file support requires host /proc files */ |
3501 | #include <sys/procfs.h> | |
3502 | #else | |
2e03ce18 ILT |
3503 | #define bfd_prstatus(abfd, descdata, descsz, filepos) true |
3504 | #define bfd_fpregset(abfd, descdata, descsz, filepos) true | |
3505 | #define bfd_prpsinfo(abfd, descdata, descsz, filepos) true | |
32090b8e | 3506 | #endif |
244ffee7 | 3507 | |
32090b8e | 3508 | #ifdef HAVE_PROCFS |
244ffee7 | 3509 | |
2e03ce18 | 3510 | static boolean |
1c6042ee ILT |
3511 | bfd_prstatus (abfd, descdata, descsz, filepos) |
3512 | bfd *abfd; | |
3513 | char *descdata; | |
3514 | int descsz; | |
3515 | long filepos; | |
32090b8e KR |
3516 | { |
3517 | asection *newsect; | |
3518 | prstatus_t *status = (prstatus_t *) 0; | |
244ffee7 | 3519 | |
32090b8e | 3520 | if (descsz == sizeof (prstatus_t)) |
244ffee7 | 3521 | { |
32090b8e | 3522 | newsect = bfd_make_section (abfd, ".reg"); |
2e03ce18 ILT |
3523 | if (newsect == NULL) |
3524 | return false; | |
32090b8e KR |
3525 | newsect->_raw_size = sizeof (status->pr_reg); |
3526 | newsect->filepos = filepos + (long) &status->pr_reg; | |
3527 | newsect->flags = SEC_ALLOC | SEC_HAS_CONTENTS; | |
3528 | newsect->alignment_power = 2; | |
3529 | if ((core_prstatus (abfd) = bfd_alloc (abfd, descsz)) != NULL) | |
3530 | { | |
3531 | memcpy (core_prstatus (abfd), descdata, descsz); | |
3532 | } | |
244ffee7 | 3533 | } |
2e03ce18 | 3534 | return true; |
32090b8e | 3535 | } |
244ffee7 | 3536 | |
32090b8e | 3537 | /* Stash a copy of the prpsinfo structure away for future use. */ |
244ffee7 | 3538 | |
2e03ce18 | 3539 | static boolean |
1c6042ee ILT |
3540 | bfd_prpsinfo (abfd, descdata, descsz, filepos) |
3541 | bfd *abfd; | |
3542 | char *descdata; | |
3543 | int descsz; | |
3544 | long filepos; | |
32090b8e | 3545 | { |
32090b8e KR |
3546 | if (descsz == sizeof (prpsinfo_t)) |
3547 | { | |
2e03ce18 | 3548 | if ((core_prpsinfo (abfd) = bfd_alloc (abfd, descsz)) == NULL) |
244ffee7 | 3549 | { |
2e03ce18 ILT |
3550 | bfd_set_error (bfd_error_no_memory); |
3551 | return false; | |
244ffee7 | 3552 | } |
2e03ce18 | 3553 | memcpy (core_prpsinfo (abfd), descdata, descsz); |
244ffee7 | 3554 | } |
2e03ce18 | 3555 | return true; |
244ffee7 JK |
3556 | } |
3557 | ||
2e03ce18 | 3558 | static boolean |
1c6042ee ILT |
3559 | bfd_fpregset (abfd, descdata, descsz, filepos) |
3560 | bfd *abfd; | |
3561 | char *descdata; | |
3562 | int descsz; | |
3563 | long filepos; | |
244ffee7 | 3564 | { |
32090b8e | 3565 | asection *newsect; |
244ffee7 | 3566 | |
32090b8e | 3567 | newsect = bfd_make_section (abfd, ".reg2"); |
2e03ce18 ILT |
3568 | if (newsect == NULL) |
3569 | return false; | |
32090b8e KR |
3570 | newsect->_raw_size = descsz; |
3571 | newsect->filepos = filepos; | |
3572 | newsect->flags = SEC_ALLOC | SEC_HAS_CONTENTS; | |
3573 | newsect->alignment_power = 2; | |
2e03ce18 | 3574 | return true; |
6a3eb9b6 | 3575 | } |
244ffee7 | 3576 | |
32090b8e KR |
3577 | #endif /* HAVE_PROCFS */ |
3578 | ||
3579 | /* Return a pointer to the args (including the command name) that were | |
3580 | seen by the program that generated the core dump. Note that for | |
3581 | some reason, a spurious space is tacked onto the end of the args | |
3582 | in some (at least one anyway) implementations, so strip it off if | |
3583 | it exists. */ | |
3584 | ||
3585 | char * | |
1c6042ee ILT |
3586 | elf_core_file_failing_command (abfd) |
3587 | bfd *abfd; | |
244ffee7 | 3588 | { |
32090b8e KR |
3589 | #ifdef HAVE_PROCFS |
3590 | if (core_prpsinfo (abfd)) | |
3591 | { | |
3592 | prpsinfo_t *p = core_prpsinfo (abfd); | |
3593 | char *scan = p->pr_psargs; | |
3594 | while (*scan++) | |
3595 | {; | |
3596 | } | |
3597 | scan -= 2; | |
3598 | if ((scan > p->pr_psargs) && (*scan == ' ')) | |
3599 | { | |
3600 | *scan = '\000'; | |
3601 | } | |
3602 | return p->pr_psargs; | |
3603 | } | |
3604 | #endif | |
3605 | return NULL; | |
3606 | } | |
244ffee7 | 3607 | |
32090b8e KR |
3608 | /* Return the number of the signal that caused the core dump. Presumably, |
3609 | since we have a core file, we got a signal of some kind, so don't bother | |
3610 | checking the other process status fields, just return the signal number. | |
3611 | */ | |
244ffee7 | 3612 | |
32090b8e | 3613 | int |
1c6042ee ILT |
3614 | elf_core_file_failing_signal (abfd) |
3615 | bfd *abfd; | |
32090b8e KR |
3616 | { |
3617 | #ifdef HAVE_PROCFS | |
3618 | if (core_prstatus (abfd)) | |
3619 | { | |
3620 | return ((prstatus_t *) (core_prstatus (abfd)))->pr_cursig; | |
3621 | } | |
3622 | #endif | |
3623 | return -1; | |
3624 | } | |
244ffee7 | 3625 | |
32090b8e KR |
3626 | /* Check to see if the core file could reasonably be expected to have |
3627 | come for the current executable file. Note that by default we return | |
3628 | true unless we find something that indicates that there might be a | |
3629 | problem. | |
3630 | */ | |
244ffee7 | 3631 | |
32090b8e | 3632 | boolean |
1c6042ee ILT |
3633 | elf_core_file_matches_executable_p (core_bfd, exec_bfd) |
3634 | bfd *core_bfd; | |
3635 | bfd *exec_bfd; | |
32090b8e KR |
3636 | { |
3637 | #ifdef HAVE_PROCFS | |
3638 | char *corename; | |
3639 | char *execname; | |
3640 | #endif | |
244ffee7 | 3641 | |
32090b8e KR |
3642 | /* First, xvecs must match since both are ELF files for the same target. */ |
3643 | ||
3644 | if (core_bfd->xvec != exec_bfd->xvec) | |
244ffee7 | 3645 | { |
d1ad85a6 | 3646 | bfd_set_error (bfd_error_system_call); |
244ffee7 JK |
3647 | return false; |
3648 | } | |
3649 | ||
32090b8e | 3650 | #ifdef HAVE_PROCFS |
244ffee7 | 3651 | |
32090b8e KR |
3652 | /* If no prpsinfo, just return true. Otherwise, grab the last component |
3653 | of the exec'd pathname from the prpsinfo. */ | |
244ffee7 | 3654 | |
32090b8e | 3655 | if (core_prpsinfo (core_bfd)) |
244ffee7 | 3656 | { |
32090b8e KR |
3657 | corename = (((struct prpsinfo *) core_prpsinfo (core_bfd))->pr_fname); |
3658 | } | |
3659 | else | |
3660 | { | |
3661 | return true; | |
3662 | } | |
244ffee7 | 3663 | |
32090b8e | 3664 | /* Find the last component of the executable pathname. */ |
244ffee7 | 3665 | |
32090b8e KR |
3666 | if ((execname = strrchr (exec_bfd->filename, '/')) != NULL) |
3667 | { | |
3668 | execname++; | |
3669 | } | |
3670 | else | |
3671 | { | |
3672 | execname = (char *) exec_bfd->filename; | |
3673 | } | |
244ffee7 | 3674 | |
32090b8e | 3675 | /* See if they match */ |
244ffee7 | 3676 | |
32090b8e | 3677 | return strcmp (execname, corename) ? false : true; |
244ffee7 | 3678 | |
32090b8e | 3679 | #else |
244ffee7 | 3680 | |
244ffee7 | 3681 | return true; |
244ffee7 | 3682 | |
32090b8e KR |
3683 | #endif /* HAVE_PROCFS */ |
3684 | } | |
244ffee7 | 3685 | |
32090b8e KR |
3686 | /* ELF core files contain a segment of type PT_NOTE, that holds much of |
3687 | the information that would normally be available from the /proc interface | |
3688 | for the process, at the time the process dumped core. Currently this | |
3689 | includes copies of the prstatus, prpsinfo, and fpregset structures. | |
244ffee7 | 3690 | |
32090b8e KR |
3691 | Since these structures are potentially machine dependent in size and |
3692 | ordering, bfd provides two levels of support for them. The first level, | |
3693 | available on all machines since it does not require that the host | |
3694 | have /proc support or the relevant include files, is to create a bfd | |
3695 | section for each of the prstatus, prpsinfo, and fpregset structures, | |
3696 | without any interpretation of their contents. With just this support, | |
3697 | the bfd client will have to interpret the structures itself. Even with | |
3698 | /proc support, it might want these full structures for it's own reasons. | |
244ffee7 | 3699 | |
32090b8e KR |
3700 | In the second level of support, where HAVE_PROCFS is defined, bfd will |
3701 | pick apart the structures to gather some additional information that | |
3702 | clients may want, such as the general register set, the name of the | |
3703 | exec'ed file and its arguments, the signal (if any) that caused the | |
3704 | core dump, etc. | |
244ffee7 | 3705 | |
32090b8e | 3706 | */ |
244ffee7 | 3707 | |
32090b8e | 3708 | static boolean |
1c6042ee ILT |
3709 | elf_corefile_note (abfd, hdr) |
3710 | bfd *abfd; | |
3711 | Elf_Internal_Phdr *hdr; | |
244ffee7 | 3712 | { |
32090b8e KR |
3713 | Elf_External_Note *x_note_p; /* Elf note, external form */ |
3714 | Elf_Internal_Note i_note; /* Elf note, internal form */ | |
3715 | char *buf = NULL; /* Entire note segment contents */ | |
3716 | char *namedata; /* Name portion of the note */ | |
3717 | char *descdata; /* Descriptor portion of the note */ | |
3718 | char *sectname; /* Name to use for new section */ | |
3719 | long filepos; /* File offset to descriptor data */ | |
3720 | asection *newsect; | |
3721 | ||
3722 | if (hdr->p_filesz > 0 | |
b9d5cdf0 | 3723 | && (buf = (char *) malloc (hdr->p_filesz)) != NULL |
32090b8e KR |
3724 | && bfd_seek (abfd, hdr->p_offset, SEEK_SET) != -1 |
3725 | && bfd_read ((PTR) buf, hdr->p_filesz, 1, abfd) == hdr->p_filesz) | |
3726 | { | |
3727 | x_note_p = (Elf_External_Note *) buf; | |
3728 | while ((char *) x_note_p < (buf + hdr->p_filesz)) | |
3729 | { | |
3730 | i_note.namesz = bfd_h_get_32 (abfd, (bfd_byte *) x_note_p->namesz); | |
3731 | i_note.descsz = bfd_h_get_32 (abfd, (bfd_byte *) x_note_p->descsz); | |
3732 | i_note.type = bfd_h_get_32 (abfd, (bfd_byte *) x_note_p->type); | |
3733 | namedata = x_note_p->name; | |
3734 | descdata = namedata + BFD_ALIGN (i_note.namesz, 4); | |
3735 | filepos = hdr->p_offset + (descdata - buf); | |
3736 | switch (i_note.type) | |
3737 | { | |
3738 | case NT_PRSTATUS: | |
3739 | /* process descdata as prstatus info */ | |
2e03ce18 ILT |
3740 | if (! bfd_prstatus (abfd, descdata, i_note.descsz, filepos)) |
3741 | return false; | |
32090b8e KR |
3742 | sectname = ".prstatus"; |
3743 | break; | |
3744 | case NT_FPREGSET: | |
3745 | /* process descdata as fpregset info */ | |
2e03ce18 ILT |
3746 | if (! bfd_fpregset (abfd, descdata, i_note.descsz, filepos)) |
3747 | return false; | |
32090b8e KR |
3748 | sectname = ".fpregset"; |
3749 | break; | |
3750 | case NT_PRPSINFO: | |
3751 | /* process descdata as prpsinfo */ | |
2e03ce18 ILT |
3752 | if (! bfd_prpsinfo (abfd, descdata, i_note.descsz, filepos)) |
3753 | return false; | |
32090b8e KR |
3754 | sectname = ".prpsinfo"; |
3755 | break; | |
3756 | default: | |
3757 | /* Unknown descriptor, just ignore it. */ | |
3758 | sectname = NULL; | |
3759 | break; | |
3760 | } | |
3761 | if (sectname != NULL) | |
3762 | { | |
3763 | newsect = bfd_make_section (abfd, sectname); | |
2e03ce18 ILT |
3764 | if (newsect == NULL) |
3765 | return false; | |
32090b8e KR |
3766 | newsect->_raw_size = i_note.descsz; |
3767 | newsect->filepos = filepos; | |
3768 | newsect->flags = SEC_ALLOC | SEC_HAS_CONTENTS; | |
3769 | newsect->alignment_power = 2; | |
3770 | } | |
3771 | x_note_p = (Elf_External_Note *) | |
3772 | (descdata + BFD_ALIGN (i_note.descsz, 4)); | |
3773 | } | |
3774 | } | |
3775 | if (buf != NULL) | |
3776 | { | |
3777 | free (buf); | |
3778 | } | |
b9d5cdf0 DM |
3779 | else if (hdr->p_filesz > 0) |
3780 | { | |
d1ad85a6 | 3781 | bfd_set_error (bfd_error_no_memory); |
b9d5cdf0 DM |
3782 | return false; |
3783 | } | |
32090b8e | 3784 | return true; |
244ffee7 | 3785 | |
244ffee7 JK |
3786 | } |
3787 | ||
32090b8e KR |
3788 | /* Core files are simply standard ELF formatted files that partition |
3789 | the file using the execution view of the file (program header table) | |
3790 | rather than the linking view. In fact, there is no section header | |
3791 | table in a core file. | |
3792 | ||
3793 | The process status information (including the contents of the general | |
3794 | register set) and the floating point register set are stored in a | |
3795 | segment of type PT_NOTE. We handcraft a couple of extra bfd sections | |
3796 | that allow standard bfd access to the general registers (.reg) and the | |
3797 | floating point registers (.reg2). | |
3798 | ||
3799 | */ | |
3800 | ||
3801 | bfd_target * | |
1c6042ee ILT |
3802 | elf_core_file_p (abfd) |
3803 | bfd *abfd; | |
244ffee7 | 3804 | { |
32090b8e KR |
3805 | Elf_External_Ehdr x_ehdr; /* Elf file header, external form */ |
3806 | Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */ | |
3807 | Elf_External_Phdr x_phdr; /* Program header table entry, external form */ | |
3808 | Elf_Internal_Phdr *i_phdrp; /* Program header table, internal form */ | |
3809 | unsigned int phindex; | |
d6439785 | 3810 | struct elf_backend_data *ebd; |
244ffee7 | 3811 | |
32090b8e KR |
3812 | /* Read in the ELF header in external format. */ |
3813 | ||
3814 | if (bfd_read ((PTR) & x_ehdr, sizeof (x_ehdr), 1, abfd) != sizeof (x_ehdr)) | |
244ffee7 | 3815 | { |
25057836 JL |
3816 | if (bfd_get_error () != bfd_error_system_call) |
3817 | bfd_set_error (bfd_error_wrong_format); | |
244ffee7 JK |
3818 | return NULL; |
3819 | } | |
32090b8e KR |
3820 | |
3821 | /* Now check to see if we have a valid ELF file, and one that BFD can | |
3822 | make use of. The magic number must match, the address size ('class') | |
3823 | and byte-swapping must match our XVEC entry, and it must have a | |
3824 | program header table (FIXME: See comments re segments at top of this | |
3825 | file). */ | |
3826 | ||
3827 | if (elf_file_p (&x_ehdr) == false) | |
244ffee7 | 3828 | { |
32090b8e | 3829 | wrong: |
d1ad85a6 | 3830 | bfd_set_error (bfd_error_wrong_format); |
32090b8e | 3831 | return NULL; |
244ffee7 | 3832 | } |
244ffee7 | 3833 | |
32090b8e | 3834 | /* FIXME, Check EI_VERSION here ! */ |
244ffee7 | 3835 | |
32090b8e KR |
3836 | { |
3837 | #if ARCH_SIZE == 32 | |
3838 | int desired_address_size = ELFCLASS32; | |
3839 | #endif | |
3840 | #if ARCH_SIZE == 64 | |
3841 | int desired_address_size = ELFCLASS64; | |
3842 | #endif | |
3843 | ||
3844 | if (x_ehdr.e_ident[EI_CLASS] != desired_address_size) | |
3845 | goto wrong; | |
3846 | } | |
3847 | ||
3848 | /* Switch xvec to match the specified byte order. */ | |
3849 | switch (x_ehdr.e_ident[EI_DATA]) | |
244ffee7 | 3850 | { |
32090b8e KR |
3851 | case ELFDATA2MSB: /* Big-endian */ |
3852 | if (abfd->xvec->byteorder_big_p == false) | |
3853 | goto wrong; | |
244ffee7 | 3854 | break; |
32090b8e KR |
3855 | case ELFDATA2LSB: /* Little-endian */ |
3856 | if (abfd->xvec->byteorder_big_p == true) | |
3857 | goto wrong; | |
244ffee7 | 3858 | break; |
32090b8e KR |
3859 | case ELFDATANONE: /* No data encoding specified */ |
3860 | default: /* Unknown data encoding specified */ | |
3861 | goto wrong; | |
244ffee7 JK |
3862 | } |
3863 | ||
32090b8e KR |
3864 | /* Allocate an instance of the elf_obj_tdata structure and hook it up to |
3865 | the tdata pointer in the bfd. */ | |
244ffee7 | 3866 | |
32090b8e KR |
3867 | elf_tdata (abfd) = |
3868 | (struct elf_obj_tdata *) bfd_zalloc (abfd, sizeof (struct elf_obj_tdata)); | |
3869 | if (elf_tdata (abfd) == NULL) | |
244ffee7 | 3870 | { |
d1ad85a6 | 3871 | bfd_set_error (bfd_error_no_memory); |
32090b8e | 3872 | return NULL; |
244ffee7 | 3873 | } |
244ffee7 | 3874 | |
32090b8e | 3875 | /* FIXME, `wrong' returns from this point onward, leak memory. */ |
244ffee7 | 3876 | |
32090b8e KR |
3877 | /* Now that we know the byte order, swap in the rest of the header */ |
3878 | i_ehdrp = elf_elfheader (abfd); | |
3879 | elf_swap_ehdr_in (abfd, &x_ehdr, i_ehdrp); | |
3880 | #if DEBUG & 1 | |
3881 | elf_debug_file (i_ehdrp); | |
3882 | #endif | |
244ffee7 | 3883 | |
d6439785 JL |
3884 | ebd = get_elf_backend_data (abfd); |
3885 | ||
3886 | /* Check that the ELF e_machine field matches what this particular | |
3887 | BFD format expects. */ | |
3888 | if (ebd->elf_machine_code != i_ehdrp->e_machine) | |
3889 | { | |
3890 | bfd_target **target_ptr; | |
3891 | ||
3892 | if (ebd->elf_machine_code != EM_NONE) | |
3893 | goto wrong; | |
3894 | ||
3895 | /* This is the generic ELF target. Let it match any ELF target | |
3896 | for which we do not have a specific backend. */ | |
3897 | for (target_ptr = bfd_target_vector; *target_ptr != NULL; target_ptr++) | |
3898 | { | |
3899 | struct elf_backend_data *back; | |
3900 | ||
3901 | if ((*target_ptr)->flavour != bfd_target_elf_flavour) | |
3902 | continue; | |
3903 | back = (struct elf_backend_data *) (*target_ptr)->backend_data; | |
3904 | if (back->elf_machine_code == i_ehdrp->e_machine) | |
3905 | { | |
3906 | /* target_ptr is an ELF backend which matches this | |
3907 | object file, so reject the generic ELF target. */ | |
3908 | goto wrong; | |
3909 | } | |
3910 | } | |
3911 | } | |
3912 | ||
32090b8e KR |
3913 | /* If there is no program header, or the type is not a core file, then |
3914 | we are hosed. */ | |
3915 | if (i_ehdrp->e_phoff == 0 || i_ehdrp->e_type != ET_CORE) | |
3916 | goto wrong; | |
244ffee7 | 3917 | |
32090b8e KR |
3918 | /* Allocate space for a copy of the program header table in |
3919 | internal form, seek to the program header table in the file, | |
3920 | read it in, and convert it to internal form. As a simple sanity | |
3921 | check, verify that the what BFD thinks is the size of each program | |
3922 | header table entry actually matches the size recorded in the file. */ | |
3923 | ||
3924 | if (i_ehdrp->e_phentsize != sizeof (x_phdr)) | |
3925 | goto wrong; | |
3926 | i_phdrp = (Elf_Internal_Phdr *) | |
3927 | bfd_alloc (abfd, sizeof (*i_phdrp) * i_ehdrp->e_phnum); | |
3928 | if (!i_phdrp) | |
244ffee7 | 3929 | { |
d1ad85a6 | 3930 | bfd_set_error (bfd_error_no_memory); |
32090b8e KR |
3931 | return NULL; |
3932 | } | |
3933 | if (bfd_seek (abfd, i_ehdrp->e_phoff, SEEK_SET) == -1) | |
25057836 | 3934 | return NULL; |
32090b8e KR |
3935 | for (phindex = 0; phindex < i_ehdrp->e_phnum; phindex++) |
3936 | { | |
3937 | if (bfd_read ((PTR) & x_phdr, sizeof (x_phdr), 1, abfd) | |
3938 | != sizeof (x_phdr)) | |
25057836 | 3939 | return NULL; |
32090b8e | 3940 | elf_swap_phdr_in (abfd, &x_phdr, i_phdrp + phindex); |
244ffee7 JK |
3941 | } |
3942 | ||
32090b8e KR |
3943 | /* Once all of the program headers have been read and converted, we |
3944 | can start processing them. */ | |
244ffee7 | 3945 | |
32090b8e KR |
3946 | for (phindex = 0; phindex < i_ehdrp->e_phnum; phindex++) |
3947 | { | |
3948 | bfd_section_from_phdr (abfd, i_phdrp + phindex, phindex); | |
3949 | if ((i_phdrp + phindex)->p_type == PT_NOTE) | |
3950 | { | |
2e03ce18 ILT |
3951 | if (! elf_corefile_note (abfd, i_phdrp + phindex)) |
3952 | return NULL; | |
32090b8e KR |
3953 | } |
3954 | } | |
244ffee7 | 3955 | |
32090b8e | 3956 | /* Remember the entry point specified in the ELF file header. */ |
244ffee7 | 3957 | |
32090b8e | 3958 | bfd_get_start_address (abfd) = i_ehdrp->e_entry; |
244ffee7 | 3959 | |
32090b8e | 3960 | return abfd->xvec; |
244ffee7 | 3961 | } |
6ec3bb6a ILT |
3962 | \f |
3963 | /* ELF linker code. */ | |
3964 | ||
3965 | static boolean elf_link_add_object_symbols | |
3966 | PARAMS ((bfd *, struct bfd_link_info *)); | |
3967 | static boolean elf_link_add_archive_symbols | |
3968 | PARAMS ((bfd *, struct bfd_link_info *)); | |
013dec1a ILT |
3969 | static INLINE boolean elf_link_record_dynamic_symbol |
3970 | PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *)); | |
3971 | static boolean elf_link_create_dynamic_sections | |
3972 | PARAMS ((bfd *, struct bfd_link_info *)); | |
3973 | static boolean elf_adjust_dynamic_symbol | |
3974 | PARAMS ((struct elf_link_hash_entry *, PTR)); | |
6ec3bb6a ILT |
3975 | |
3976 | /* Given an ELF BFD, add symbols to the global hash table as | |
3977 | appropriate. */ | |
3978 | ||
3979 | boolean | |
3980 | elf_bfd_link_add_symbols (abfd, info) | |
3981 | bfd *abfd; | |
3982 | struct bfd_link_info *info; | |
3983 | { | |
3984 | switch (bfd_get_format (abfd)) | |
3985 | { | |
3986 | case bfd_object: | |
3987 | return elf_link_add_object_symbols (abfd, info); | |
3988 | case bfd_archive: | |
3989 | return elf_link_add_archive_symbols (abfd, info); | |
3990 | default: | |
3991 | bfd_set_error (bfd_error_wrong_format); | |
3992 | return false; | |
3993 | } | |
3994 | } | |
3995 | ||
3996 | /* Add symbols from an ELF archive file to the linker hash table. We | |
3997 | don't use _bfd_generic_link_add_archive_symbols because of a | |
3998 | problem which arises on UnixWare. The UnixWare libc.so is an | |
3999 | archive which includes an entry libc.so.1 which defines a bunch of | |
4000 | symbols. The libc.so archive also includes a number of other | |
4001 | object files, which also define symbols, some of which are the same | |
4002 | as those defined in libc.so.1. Correct linking requires that we | |
4003 | consider each object file in turn, and include it if it defines any | |
4004 | symbols we need. _bfd_generic_link_add_archive_symbols does not do | |
4005 | this; it looks through the list of undefined symbols, and includes | |
4006 | any object file which defines them. When this algorithm is used on | |
4007 | UnixWare, it winds up pulling in libc.so.1 early and defining a | |
4008 | bunch of symbols. This means that some of the other objects in the | |
4009 | archive are not included in the link, which is incorrect since they | |
4010 | precede libc.so.1 in the archive. | |
4011 | ||
4012 | Fortunately, ELF archive handling is simpler than that done by | |
4013 | _bfd_generic_link_add_archive_symbols, which has to allow for a.out | |
4014 | oddities. In ELF, if we find a symbol in the archive map, and the | |
4015 | symbol is currently undefined, we know that we must pull in that | |
4016 | object file. | |
4017 | ||
4018 | Unfortunately, we do have to make multiple passes over the symbol | |
4019 | table until nothing further is resolved. */ | |
4020 | ||
4021 | static boolean | |
4022 | elf_link_add_archive_symbols (abfd, info) | |
4023 | bfd *abfd; | |
4024 | struct bfd_link_info *info; | |
4025 | { | |
4026 | symindex c; | |
4027 | boolean *defined = NULL; | |
4028 | boolean *included = NULL; | |
4029 | carsym *symdefs; | |
4030 | boolean loop; | |
4031 | ||
4032 | if (! bfd_has_map (abfd)) | |
4033 | { | |
4034 | bfd_set_error (bfd_error_no_symbols); | |
4035 | return false; | |
4036 | } | |
4037 | ||
4038 | /* Keep track of all symbols we know to be already defined, and all | |
4039 | files we know to be already included. This is to speed up the | |
4040 | second and subsequent passes. */ | |
4041 | c = bfd_ardata (abfd)->symdef_count; | |
4042 | if (c == 0) | |
4043 | return true; | |
4044 | defined = (boolean *) malloc (c * sizeof (boolean)); | |
4045 | included = (boolean *) malloc (c * sizeof (boolean)); | |
4046 | if (defined == (boolean *) NULL || included == (boolean *) NULL) | |
4047 | { | |
4048 | bfd_set_error (bfd_error_no_memory); | |
4049 | goto error_return; | |
4050 | } | |
4051 | memset (defined, 0, c * sizeof (boolean)); | |
4052 | memset (included, 0, c * sizeof (boolean)); | |
4053 | ||
4054 | symdefs = bfd_ardata (abfd)->symdefs; | |
4055 | ||
4056 | do | |
4057 | { | |
4058 | file_ptr last; | |
4059 | symindex i; | |
4060 | carsym *symdef; | |
4061 | carsym *symdefend; | |
4062 | ||
4063 | loop = false; | |
4064 | last = -1; | |
4065 | ||
4066 | symdef = symdefs; | |
4067 | symdefend = symdef + c; | |
4068 | for (i = 0; symdef < symdefend; symdef++, i++) | |
4069 | { | |
4070 | struct elf_link_hash_entry *h; | |
4071 | bfd *element; | |
4072 | struct bfd_link_hash_entry *undefs_tail; | |
4073 | symindex mark; | |
4074 | ||
4075 | if (defined[i] || included[i]) | |
4076 | continue; | |
4077 | if (symdef->file_offset == last) | |
4078 | { | |
4079 | included[i] = true; | |
4080 | continue; | |
4081 | } | |
4082 | ||
4083 | h = elf_link_hash_lookup (elf_hash_table (info), symdef->name, | |
4084 | false, false, false); | |
4085 | if (h == (struct elf_link_hash_entry *) NULL) | |
4086 | continue; | |
4087 | if (h->root.type != bfd_link_hash_undefined) | |
4088 | { | |
4089 | defined[i] = true; | |
4090 | continue; | |
4091 | } | |
4092 | ||
4093 | /* We need to include this archive member. */ | |
4094 | ||
4095 | element = _bfd_get_elt_at_filepos (abfd, symdef->file_offset); | |
4096 | if (element == (bfd *) NULL) | |
4097 | goto error_return; | |
4098 | ||
4099 | if (! bfd_check_format (element, bfd_object)) | |
4100 | goto error_return; | |
4101 | ||
4102 | /* Doublecheck that we have not included this object | |
4103 | already--it should be impossible, but there may be | |
4104 | something wrong with the archive. */ | |
4105 | if (element->archive_pass != 0) | |
4106 | { | |
4107 | bfd_set_error (bfd_error_bad_value); | |
4108 | goto error_return; | |
4109 | } | |
4110 | element->archive_pass = 1; | |
4111 | ||
4112 | undefs_tail = info->hash->undefs_tail; | |
4113 | ||
4114 | if (! (*info->callbacks->add_archive_element) (info, element, | |
4115 | symdef->name)) | |
4116 | goto error_return; | |
4117 | if (! elf_link_add_object_symbols (element, info)) | |
4118 | goto error_return; | |
4119 | ||
4120 | /* If there are any new undefined symbols, we need to make | |
4121 | another pass through the archive in order to see whether | |
4122 | they can be defined. FIXME: This isn't perfect, because | |
4123 | common symbols wind up on undefs_tail and because an | |
4124 | undefined symbol which is defined later on in this pass | |
4125 | does not require another pass. This isn't a bug, but it | |
4126 | does make the code less efficient than it could be. */ | |
4127 | if (undefs_tail != info->hash->undefs_tail) | |
4128 | loop = true; | |
4129 | ||
4130 | /* Look backward to mark all symbols from this object file | |
4131 | which we have already seen in this pass. */ | |
4132 | mark = i; | |
4133 | do | |
4134 | { | |
4135 | included[mark] = true; | |
4136 | if (mark == 0) | |
4137 | break; | |
4138 | --mark; | |
4139 | } | |
4140 | while (symdefs[mark].file_offset == symdef->file_offset); | |
4141 | ||
4142 | /* We mark subsequent symbols from this object file as we go | |
4143 | on through the loop. */ | |
4144 | last = symdef->file_offset; | |
4145 | } | |
4146 | } | |
4147 | while (loop); | |
4148 | ||
4149 | free (defined); | |
4150 | free (included); | |
4151 | ||
4152 | return true; | |
4153 | ||
4154 | error_return: | |
4155 | if (defined != (boolean *) NULL) | |
4156 | free (defined); | |
4157 | if (included != (boolean *) NULL) | |
4158 | free (included); | |
4159 | return false; | |
4160 | } | |
4161 | ||
013dec1a ILT |
4162 | /* Record a new dynamic symbol. We record the dynamic symbols as we |
4163 | read the input files, since we need to have a list of all of them | |
4164 | before we can determine the final sizes of the output sections. */ | |
4165 | ||
4166 | static INLINE boolean | |
4167 | elf_link_record_dynamic_symbol (info, h) | |
4168 | struct bfd_link_info *info; | |
4169 | struct elf_link_hash_entry *h; | |
4170 | { | |
4171 | if (h->dynindx == -1) | |
4172 | { | |
4173 | h->dynindx = elf_hash_table (info)->dynsymcount; | |
4174 | ++elf_hash_table (info)->dynsymcount; | |
4175 | h->dynstr_index = bfd_add_to_strtab (elf_hash_table (info)->dynobj, | |
4176 | elf_hash_table (info)->dynstr, | |
4177 | h->root.root.string); | |
4178 | if (h->dynstr_index == (unsigned long) -1) | |
4179 | return false; | |
4180 | } | |
4181 | ||
4182 | return true; | |
4183 | } | |
4184 | ||
6ec3bb6a ILT |
4185 | /* Add symbols from an ELF object file to the linker hash table. */ |
4186 | ||
4187 | static boolean | |
4188 | elf_link_add_object_symbols (abfd, info) | |
4189 | bfd *abfd; | |
4190 | struct bfd_link_info *info; | |
4191 | { | |
4192 | boolean (*add_symbol_hook) PARAMS ((bfd *, struct bfd_link_info *, | |
4193 | const Elf_Internal_Sym *, | |
4194 | const char **, flagword *, | |
4195 | asection **, bfd_vma *)); | |
4196 | boolean collect; | |
4197 | Elf_Internal_Shdr *hdr; | |
4198 | size_t symcount; | |
4199 | size_t extsymcount; | |
4200 | Elf_External_Sym *buf = NULL; | |
4201 | struct elf_link_hash_entry **sym_hash; | |
013dec1a ILT |
4202 | boolean dynamic; |
4203 | Elf_External_Dyn *dynbuf = NULL; | |
4204 | struct elf_link_hash_entry *weaks; | |
6ec3bb6a ILT |
4205 | Elf_External_Sym *esym; |
4206 | Elf_External_Sym *esymend; | |
4207 | ||
4208 | add_symbol_hook = get_elf_backend_data (abfd)->elf_add_symbol_hook; | |
4209 | collect = get_elf_backend_data (abfd)->collect; | |
4210 | ||
4211 | hdr = &elf_tdata (abfd)->symtab_hdr; | |
4212 | symcount = hdr->sh_size / sizeof (Elf_External_Sym); | |
4213 | ||
4214 | /* The sh_info field of the symtab header tells us where the | |
4215 | external symbols start. We don't care about the local symbols at | |
4216 | this point. */ | |
4217 | extsymcount = symcount - hdr->sh_info; | |
4218 | ||
4219 | buf = (Elf_External_Sym *) malloc (extsymcount * sizeof (Elf_External_Sym)); | |
4220 | if (buf == NULL && extsymcount != 0) | |
4221 | { | |
4222 | bfd_set_error (bfd_error_no_memory); | |
4223 | goto error_return; | |
4224 | } | |
4225 | ||
013dec1a ILT |
4226 | /* We store a pointer to the hash table entry for each external |
4227 | symbol. */ | |
6ec3bb6a ILT |
4228 | sym_hash = ((struct elf_link_hash_entry **) |
4229 | bfd_alloc (abfd, | |
4230 | extsymcount * sizeof (struct elf_link_hash_entry *))); | |
4231 | if (sym_hash == NULL) | |
4232 | { | |
4233 | bfd_set_error (bfd_error_no_memory); | |
4234 | goto error_return; | |
4235 | } | |
4236 | elf_sym_hashes (abfd) = sym_hash; | |
4237 | ||
013dec1a ILT |
4238 | if (elf_elfheader (abfd)->e_type != ET_DYN) |
4239 | dynamic = false; | |
4240 | else | |
4241 | { | |
4242 | asection *s; | |
4243 | const char *name; | |
4244 | unsigned long strindex; | |
4245 | ||
4246 | dynamic = true; | |
4247 | ||
4248 | /* You can't use -r against a dynamic object. There's no hope | |
4249 | of using a dynamic object which does not exactly match the | |
4250 | format of the output file. */ | |
4251 | if (info->relocateable | |
4252 | || info->hash->creator != abfd->xvec) | |
4253 | { | |
4254 | bfd_set_error (bfd_error_invalid_operation); | |
4255 | goto error_return; | |
4256 | } | |
4257 | ||
4258 | /* Find the name to use in a DT_NEEDED entry that refers to this | |
4259 | object. If the object has a DT_SONAME entry, we use it. | |
4260 | Otherwise, we use the file name. */ | |
4261 | name = bfd_get_filename (abfd); | |
4262 | s = bfd_get_section_by_name (abfd, ".dynamic"); | |
4263 | if (s != NULL) | |
4264 | { | |
4265 | Elf_External_Dyn *extdyn; | |
4266 | Elf_External_Dyn *extdynend; | |
4267 | ||
4268 | dynbuf = (Elf_External_Dyn *) malloc (s->_raw_size); | |
4269 | if (dynbuf == NULL) | |
4270 | { | |
4271 | bfd_set_error (bfd_error_no_memory); | |
4272 | goto error_return; | |
4273 | } | |
4274 | ||
4275 | if (! bfd_get_section_contents (abfd, s, (PTR) dynbuf, | |
4276 | (file_ptr) 0, s->_raw_size)) | |
4277 | goto error_return; | |
4278 | ||
4279 | extdyn = dynbuf; | |
4280 | extdynend = extdyn + s->_raw_size / sizeof (Elf_External_Dyn); | |
4281 | for (; extdyn < extdynend; extdyn++) | |
4282 | { | |
4283 | Elf_Internal_Dyn dyn; | |
4284 | ||
4285 | elf_swap_dyn_in (abfd, extdyn, &dyn); | |
4286 | if (dyn.d_tag == DT_SONAME) | |
4287 | { | |
4288 | int elfsec; | |
4289 | unsigned long link; | |
4290 | ||
4291 | elfsec = elf_section_from_bfd_section (abfd, s); | |
4292 | if (elfsec == -1) | |
4293 | goto error_return; | |
4294 | link = elf_elfsections (abfd)[elfsec]->sh_link; | |
4295 | name = elf_string_from_elf_section (abfd, link, | |
4296 | dyn.d_un.d_val); | |
4297 | if (name == NULL) | |
4298 | goto error_return; | |
4299 | ||
4300 | break; | |
4301 | } | |
4302 | } | |
4303 | ||
4304 | free (dynbuf); | |
4305 | dynbuf = NULL; | |
4306 | } | |
4307 | ||
4308 | /* We do not want to include any of the sections in a dynamic | |
4309 | object in the output file. We hack by simply clobbering the | |
4310 | list of sections in the BFD. This could be handled more | |
4311 | cleanly by, say, a new section flag; the existing | |
4312 | SEC_NEVER_LOAD flag is not the one we want, because that one | |
4313 | still implies that the section takes up space in the output | |
4314 | file. */ | |
4315 | abfd->sections = NULL; | |
4316 | ||
4317 | /* If this is the first dynamic object found in the link, create | |
4318 | the special sections required for dynamic linking. We need | |
4319 | to put them somewhere, and attaching them to the first | |
4320 | dynamic object is as good place as any. */ | |
4321 | if (elf_hash_table (info)->dynobj == NULL) | |
4322 | { | |
4323 | if (! elf_link_create_dynamic_sections (abfd, info)) | |
4324 | goto error_return; | |
4325 | elf_hash_table (info)->dynobj = abfd; | |
4326 | } | |
4327 | ||
4328 | /* Add a DT_NEEDED entry for this dynamic object. */ | |
4329 | strindex = bfd_add_to_strtab (abfd, | |
4330 | elf_hash_table (info)->dynstr, | |
4331 | name); | |
4332 | ||
4333 | if (strindex == (unsigned long) -1) | |
4334 | goto error_return; | |
4335 | if (! elf_add_dynamic_entry (info, DT_NEEDED, strindex)) | |
4336 | goto error_return; | |
4337 | } | |
4338 | ||
6ec3bb6a ILT |
4339 | if (bfd_seek (abfd, |
4340 | hdr->sh_offset + hdr->sh_info * sizeof (Elf_External_Sym), | |
4341 | SEEK_SET) != 0 | |
4342 | || (bfd_read ((PTR) buf, sizeof (Elf_External_Sym), extsymcount, abfd) | |
4343 | != extsymcount * sizeof (Elf_External_Sym))) | |
4344 | goto error_return; | |
4345 | ||
013dec1a ILT |
4346 | weaks = NULL; |
4347 | ||
6ec3bb6a ILT |
4348 | esymend = buf + extsymcount; |
4349 | for (esym = buf; esym < esymend; esym++, sym_hash++) | |
4350 | { | |
4351 | Elf_Internal_Sym sym; | |
4352 | int bind; | |
4353 | bfd_vma value; | |
4354 | asection *sec; | |
4355 | flagword flags; | |
4356 | const char *name; | |
013dec1a ILT |
4357 | struct elf_link_hash_entry *h = NULL; |
4358 | boolean definition; | |
6ec3bb6a ILT |
4359 | |
4360 | elf_swap_symbol_in (abfd, esym, &sym); | |
4361 | ||
4362 | flags = BSF_NO_FLAGS; | |
4363 | sec = NULL; | |
4364 | value = sym.st_value; | |
4365 | *sym_hash = NULL; | |
4366 | ||
4367 | bind = ELF_ST_BIND (sym.st_info); | |
4368 | if (bind == STB_LOCAL) | |
4369 | { | |
4370 | /* This should be impossible, since ELF requires that all | |
4371 | global symbols follow all local symbols, and that sh_info | |
4372 | point to the first global symbol. */ | |
4373 | bfd_set_error (bfd_error_bad_value); | |
4374 | goto error_return; | |
4375 | } | |
4376 | else if (bind == STB_GLOBAL) | |
4377 | flags = BSF_GLOBAL; | |
4378 | else if (bind == STB_WEAK) | |
4379 | flags = BSF_WEAK; | |
4380 | else | |
4381 | { | |
4382 | /* Leave it up to the processor backend. */ | |
4383 | } | |
4384 | ||
4385 | if (sym.st_shndx == SHN_UNDEF) | |
4386 | sec = &bfd_und_section; | |
4387 | else if (sym.st_shndx > 0 && sym.st_shndx < SHN_LORESERVE) | |
4388 | { | |
4389 | sec = section_from_elf_index (abfd, sym.st_shndx); | |
4390 | if (sec == NULL) | |
4391 | goto error_return; | |
4392 | value -= sec->vma; | |
4393 | } | |
4394 | else if (sym.st_shndx == SHN_ABS) | |
4395 | sec = &bfd_abs_section; | |
4396 | else if (sym.st_shndx == SHN_COMMON) | |
4397 | { | |
4398 | sec = &bfd_com_section; | |
4399 | /* What ELF calls the size we call the value. What ELF | |
4400 | calls the value we call the alignment. */ | |
4401 | value = sym.st_size; | |
4402 | } | |
4403 | else | |
4404 | { | |
4405 | /* Leave it up to the processor backend. */ | |
4406 | } | |
4407 | ||
4408 | name = elf_string_from_elf_section (abfd, hdr->sh_link, sym.st_name); | |
4409 | if (name == (const char *) NULL) | |
4410 | goto error_return; | |
4411 | ||
4412 | if (add_symbol_hook) | |
4413 | { | |
4414 | if (! (*add_symbol_hook) (abfd, info, &sym, &name, &flags, &sec, | |
4415 | &value)) | |
4416 | goto error_return; | |
4417 | ||
4418 | /* The hook function sets the name to NULL if this symbol | |
4419 | should be skipped for some reason. */ | |
4420 | if (name == (const char *) NULL) | |
4421 | continue; | |
4422 | } | |
4423 | ||
4424 | /* Sanity check that all possibilities were handled. */ | |
4425 | if (flags == BSF_NO_FLAGS || sec == (asection *) NULL) | |
4426 | { | |
4427 | bfd_set_error (bfd_error_bad_value); | |
4428 | goto error_return; | |
4429 | } | |
4430 | ||
013dec1a ILT |
4431 | if (sec == &bfd_und_section |
4432 | || bfd_is_com_section (sec)) | |
4433 | definition = false; | |
4434 | else | |
4435 | definition = true; | |
4436 | ||
4437 | if (info->hash->creator->flavour == bfd_target_elf_flavour) | |
4438 | { | |
4439 | /* We need to look up the symbol now in order to get some of | |
4440 | the dynamic object handling right. We pass the hash | |
4441 | table entry in to _bfd_generic_link_add_one_symbol so | |
4442 | that it does not have to look it up again. */ | |
4443 | h = elf_link_hash_lookup (elf_hash_table (info), name, | |
4444 | true, false, false); | |
4445 | if (h == NULL) | |
4446 | goto error_return; | |
4447 | *sym_hash = h; | |
4448 | ||
4449 | /* If we are looking at a dynamic object, and this is a | |
4450 | definition, we need to see if it has already been defined | |
4451 | by some other object. If it has, we want to use the | |
4452 | existing definition, and we do not want to report a | |
4453 | multiple symbol definition error; we do this by | |
4454 | clobbering sec to be bfd_und_section. */ | |
4455 | if (dynamic && definition) | |
4456 | { | |
4457 | if (h->root.type == bfd_link_hash_defined) | |
4458 | sec = &bfd_und_section; | |
4459 | } | |
4460 | ||
4461 | /* Similarly, if we are not looking at a dynamic object, and | |
4462 | we have a definition, we want to override any definition | |
4463 | we may have from a dynamic object. Symbols from regular | |
4464 | files always take precedence over symbols from dynamic | |
4465 | objects, even if they are defined after the dynamic | |
4466 | object in the link. */ | |
4467 | if (! dynamic | |
4468 | && definition | |
4469 | && h->root.type == bfd_link_hash_defined | |
4470 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
4471 | && (bfd_get_flavour (h->root.u.def.section->owner) | |
4472 | == bfd_target_elf_flavour) | |
4473 | && (elf_elfheader (h->root.u.def.section->owner)->e_type | |
4474 | == ET_DYN)) | |
4475 | { | |
4476 | /* Change the hash table entry to undefined, and let | |
4477 | _bfd_generic_link_add_one_symbol do the right thing | |
4478 | with the new definition. */ | |
4479 | h->root.type = bfd_link_hash_undefined; | |
4480 | h->root.u.undef.abfd = h->root.u.def.section->owner; | |
4481 | } | |
4482 | } | |
4483 | ||
4484 | if (! (_bfd_generic_link_add_one_symbol | |
4485 | (info, abfd, name, flags, sec, value, (const char *) NULL, | |
4486 | false, collect, (struct bfd_link_hash_entry **) sym_hash))) | |
6ec3bb6a ILT |
4487 | goto error_return; |
4488 | ||
013dec1a ILT |
4489 | if (dynamic |
4490 | && definition | |
4491 | && (flags & BSF_WEAK) != 0 | |
4492 | && ELF_ST_TYPE (sym.st_info) != STT_FUNC | |
4493 | && (*sym_hash)->weakdef == NULL) | |
4494 | { | |
4495 | /* Keep a list of all weak defined non function symbols from | |
4496 | a dynamic object, using the weakdef field. Later in this | |
4497 | function we will set the weakdef field to the correct | |
4498 | value. We only put non-function symbols from dynamic | |
4499 | objects on this list, because that happens to be the only | |
4500 | time we need to know the normal symbol corresponding to a | |
4501 | weak symbol, and the information is time consuming to | |
4502 | figure out. If the weakdef field is not already NULL, | |
4503 | then this symbol was already defined by some previous | |
4504 | dynamic object, and we will be using that previous | |
4505 | definition anyhow. */ | |
4506 | ||
4507 | (*sym_hash)->weakdef = weaks; | |
4508 | weaks = *sym_hash; | |
4509 | } | |
4510 | ||
6ec3bb6a ILT |
4511 | if (info->hash->creator->flavour == bfd_target_elf_flavour) |
4512 | { | |
013dec1a ILT |
4513 | int old_flags; |
4514 | boolean dynsym; | |
4515 | int new_flag; | |
4516 | ||
6ec3bb6a ILT |
4517 | /* Remember the symbol size, type and alignment. */ |
4518 | if (sym.st_size != 0) | |
4519 | { | |
4520 | /* FIXME: We should probably somehow give a warning if | |
4521 | the symbol size changes. */ | |
013dec1a | 4522 | h->size = sym.st_size; |
6ec3bb6a ILT |
4523 | } |
4524 | if (sym.st_shndx == SHN_COMMON | |
013dec1a ILT |
4525 | && sym.st_value > h->align) |
4526 | h->align = sym.st_value; | |
6ec3bb6a ILT |
4527 | if (ELF_ST_TYPE (sym.st_info) != STT_NOTYPE) |
4528 | { | |
4529 | /* FIXME: We should probably somehow give a warning if | |
4530 | the symbol type changes. */ | |
013dec1a ILT |
4531 | h->type = ELF_ST_TYPE (sym.st_info); |
4532 | } | |
4533 | ||
4534 | /* Set a flag in the hash table entry indicating the type of | |
4535 | reference or definition we just found. Keep a count of | |
4536 | the number of dynamic symbols we find. A dynamic symbol | |
4537 | is one which is referenced or defined by both a regular | |
4538 | object and a shared object, or one which is referenced or | |
4539 | defined by more than one shared object. */ | |
4540 | old_flags = h->elf_link_hash_flags; | |
4541 | dynsym = false; | |
4542 | if (! dynamic) | |
4543 | { | |
4544 | if (! definition) | |
4545 | new_flag = ELF_LINK_HASH_REF_REGULAR; | |
4546 | else | |
4547 | new_flag = ELF_LINK_HASH_DEF_REGULAR; | |
4548 | if ((old_flags & (ELF_LINK_HASH_DEF_DYNAMIC | |
4549 | | ELF_LINK_HASH_REF_DYNAMIC)) != 0) | |
4550 | dynsym = true; | |
4551 | } | |
4552 | else | |
4553 | { | |
4554 | if (! definition) | |
4555 | new_flag = ELF_LINK_HASH_REF_DYNAMIC; | |
4556 | else | |
4557 | new_flag = ELF_LINK_HASH_DEF_DYNAMIC; | |
4558 | if ((old_flags & new_flag) != 0) | |
4559 | { | |
4560 | if (! definition) | |
4561 | new_flag = ELF_LINK_HASH_REF_DYNAMIC_MULTIPLE; | |
4562 | else | |
4563 | new_flag = ELF_LINK_HASH_DEF_DYNAMIC_MULTIPLE; | |
4564 | dynsym = true; | |
4565 | } | |
4566 | else | |
4567 | { | |
4568 | if ((old_flags & (ELF_LINK_HASH_DEF_REGULAR | |
4569 | | ELF_LINK_HASH_REF_REGULAR)) != 0) | |
4570 | dynsym = true; | |
4571 | } | |
4572 | } | |
4573 | ||
4574 | h->elf_link_hash_flags |= new_flag; | |
4575 | if (dynsym && h->dynindx == -1) | |
4576 | { | |
4577 | if (! elf_link_record_dynamic_symbol (info, h)) | |
4578 | goto error_return; | |
4579 | } | |
4580 | } | |
4581 | } | |
4582 | ||
4583 | /* Now set the weakdefs field correctly for all the weak defined | |
4584 | symbols we found. The only way to do this is to search all the | |
4585 | symbols. Since we only need the information for non functions in | |
4586 | dynamic objects, that's the only time we actually put anything on | |
4587 | the list WEAKS. We need this information so that if a regular | |
4588 | object refers to a symbol defined weakly in a dynamic object, the | |
4589 | real symbol in the dynamic object is also put in the dynamic | |
4590 | symbols; we also must arrange for both symbols to point to the | |
4591 | same memory location. We could handle the general case of symbol | |
4592 | aliasing, but a general symbol alias can only be generated in | |
4593 | assembler code, handling it correctly would be very time | |
4594 | consuming, and other ELF linkers don't handle general aliasing | |
4595 | either. */ | |
4596 | while (weaks != NULL) | |
4597 | { | |
4598 | struct elf_link_hash_entry *hlook; | |
4599 | asection *slook; | |
4600 | bfd_vma vlook; | |
4601 | struct elf_link_hash_entry **hpp; | |
4602 | struct elf_link_hash_entry **hppend; | |
4603 | ||
4604 | hlook = weaks; | |
4605 | weaks = hlook->weakdef; | |
4606 | hlook->weakdef = NULL; | |
4607 | ||
4608 | BFD_ASSERT (hlook->root.type == bfd_link_hash_defined); | |
4609 | slook = hlook->root.u.def.section; | |
4610 | vlook = hlook->root.u.def.value; | |
4611 | ||
4612 | hpp = elf_sym_hashes (abfd); | |
4613 | hppend = hpp + extsymcount; | |
4614 | for (; hpp < hppend; hpp++) | |
4615 | { | |
4616 | struct elf_link_hash_entry *h; | |
4617 | ||
4618 | h = *hpp; | |
4619 | if (h != hlook | |
4620 | && h->root.type == bfd_link_hash_defined | |
4621 | && h->root.u.def.section == slook | |
4622 | && h->root.u.def.value == vlook) | |
4623 | { | |
4624 | hlook->weakdef = h; | |
4625 | ||
4626 | /* If the weak definition is in the list of dynamic | |
4627 | symbols, make sure the real definition is put there | |
4628 | as well. */ | |
4629 | if (hlook->dynindx != -1 | |
4630 | && h->dynindx == -1) | |
4631 | { | |
4632 | if (! elf_link_record_dynamic_symbol (info, h)) | |
4633 | goto error_return; | |
4634 | } | |
4635 | ||
4636 | break; | |
6ec3bb6a ILT |
4637 | } |
4638 | } | |
4639 | } | |
4640 | ||
4641 | if (buf != NULL) | |
4642 | free (buf); | |
4643 | ||
4644 | return true; | |
4645 | ||
4646 | error_return: | |
4647 | if (buf != NULL) | |
4648 | free (buf); | |
013dec1a ILT |
4649 | if (dynbuf != NULL) |
4650 | free (dynbuf); | |
6ec3bb6a ILT |
4651 | return false; |
4652 | } | |
013dec1a ILT |
4653 | |
4654 | /* Create some sections which will be filled in with dynamic linking | |
4655 | information. The ABFD argument is an input file which is a dynamic | |
4656 | object. The dynamic sections take up virtual memory space when the | |
4657 | final executable is run, so we need to create them before addresses | |
4658 | are assigned to the output sections. We work out the actual | |
4659 | contents and size of these sections later. */ | |
4660 | ||
4661 | static boolean | |
4662 | elf_link_create_dynamic_sections (abfd, info) | |
4663 | bfd *abfd; | |
4664 | struct bfd_link_info *info; | |
4665 | { | |
4666 | flagword flags; | |
4667 | register asection *s; | |
4668 | struct elf_link_hash_entry *h; | |
4669 | struct elf_backend_data *bed; | |
4670 | ||
4671 | /* Note that we set the SEC_IN_MEMORY flag for all of these | |
4672 | sections. */ | |
4673 | flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY; | |
4674 | ||
4675 | s = bfd_make_section (abfd, ".interp"); | |
4676 | if (s == NULL | |
4677 | || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)) | |
4678 | return false; | |
4679 | ||
4680 | s = bfd_make_section (abfd, ".dynamic"); | |
4681 | if (s == NULL | |
4682 | || ! bfd_set_section_flags (abfd, s, flags) | |
4683 | || ! bfd_set_section_alignment (abfd, s, LOG_FILE_ALIGN)) | |
4684 | return false; | |
4685 | ||
4686 | /* The special symbol _DYNAMIC is always set to the start of the | |
4687 | .dynamic section. This call occurs before we have processed the | |
4688 | symbols for any dynamic object, so we don't have to worry about | |
4689 | overriding a dynamic definition. We could set _DYNAMIC in a | |
4690 | linker script, but we only want to define it if we are, in fact, | |
4691 | creating a .dynamic section. We don't want to define it if there | |
4692 | is no .dynamic section, since on some ELF platforms the start up | |
4693 | code examines it to decide how to initialize the process. */ | |
4694 | h = NULL; | |
4695 | if (! (_bfd_generic_link_add_one_symbol | |
4696 | (info, abfd, "_DYNAMIC", BSF_GLOBAL, s, (bfd_vma) 0, | |
4697 | (const char *) NULL, false, get_elf_backend_data (abfd)->collect, | |
4698 | (struct bfd_link_hash_entry **) &h))) | |
4699 | return false; | |
4700 | h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR; | |
4701 | ||
4702 | s = bfd_make_section (abfd, ".dynsym"); | |
4703 | if (s == NULL | |
4704 | || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY) | |
4705 | || ! bfd_set_section_alignment (abfd, s, LOG_FILE_ALIGN)) | |
4706 | return false; | |
4707 | ||
4708 | /* The first .dynsym symbol is a dummy. */ | |
4709 | elf_hash_table (info)->dynsymcount = 1; | |
4710 | ||
4711 | s = bfd_make_section (abfd, ".dynstr"); | |
4712 | if (s == NULL | |
4713 | || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)) | |
4714 | return false; | |
4715 | ||
4716 | /* Create a strtab to hold the dynamic symbol names. */ | |
4717 | elf_hash_table (info)->dynstr = bfd_new_strtab (abfd); | |
4718 | if (elf_hash_table (info)->dynstr == NULL) | |
4719 | return false; | |
4720 | ||
4721 | s = bfd_make_section (abfd, ".hash"); | |
4722 | if (s == NULL | |
4723 | || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY) | |
4724 | || ! bfd_set_section_alignment (abfd, s, LOG_FILE_ALIGN)) | |
4725 | return false; | |
4726 | ||
4727 | /* Let the backend create the rest of the sections. This lets the | |
4728 | backend set the right flags. The backend will normally create | |
4729 | the .got and .plt sections. */ | |
4730 | bed = get_elf_backend_data (abfd); | |
4731 | return (*bed->elf_backend_create_dynamic_sections) (abfd, info); | |
4732 | } | |
4733 | ||
4734 | /* Add an entry to the .dynamic table. */ | |
4735 | ||
4736 | boolean | |
4737 | elf_add_dynamic_entry (info, tag, val) | |
4738 | struct bfd_link_info *info; | |
4739 | bfd_vma tag; | |
4740 | bfd_vma val; | |
4741 | { | |
4742 | Elf_Internal_Dyn dyn; | |
4743 | bfd *dynobj; | |
4744 | asection *s; | |
4745 | size_t newsize; | |
4746 | bfd_byte *newcontents; | |
4747 | ||
4748 | dynobj = elf_hash_table (info)->dynobj; | |
4749 | ||
4750 | s = bfd_get_section_by_name (dynobj, ".dynamic"); | |
4751 | BFD_ASSERT (s != NULL); | |
4752 | ||
4753 | newsize = s->_raw_size + sizeof (Elf_External_Dyn); | |
4754 | if (s->contents == NULL) | |
4755 | newcontents = (bfd_byte *) malloc (newsize); | |
4756 | else | |
4757 | newcontents = (bfd_byte *) realloc (s->contents, newsize); | |
4758 | if (newcontents == NULL) | |
4759 | { | |
4760 | bfd_set_error (bfd_error_no_memory); | |
4761 | return false; | |
4762 | } | |
4763 | ||
4764 | dyn.d_tag = tag; | |
4765 | dyn.d_un.d_val = val; | |
4766 | elf_swap_dyn_out (dynobj, &dyn, | |
4767 | (Elf_External_Dyn *) (newcontents + s->_raw_size)); | |
4768 | ||
4769 | s->_raw_size = newsize; | |
4770 | s->contents = newcontents; | |
4771 | ||
4772 | return true; | |
4773 | } | |
4774 | ||
4775 | /* Record an assignment to a symbol made by a linker script. We need | |
4776 | this in case some dynamic object refers to this symbol. */ | |
4777 | ||
4778 | /*ARGSUSED*/ | |
4779 | boolean | |
4780 | NAME(bfd_elf,record_link_assignment) (output_bfd, info, name) | |
4781 | bfd *output_bfd; | |
4782 | struct bfd_link_info *info; | |
4783 | const char *name; | |
4784 | { | |
4785 | struct elf_link_hash_entry *h; | |
4786 | ||
4787 | /* This is called after we have examined all the input objects. If | |
4788 | the symbol does not exist, it merely means that no object refers | |
4789 | to it, and we can just ignore it at this point. */ | |
4790 | h = elf_link_hash_lookup (elf_hash_table (info), name, | |
4791 | false, false, false); | |
4792 | if (h == NULL) | |
4793 | return true; | |
4794 | ||
4795 | h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR; | |
4796 | ||
4797 | if ((h->elf_link_hash_flags & (ELF_LINK_HASH_DEF_DYNAMIC | |
4798 | | ELF_LINK_HASH_REF_DYNAMIC)) != 0 | |
4799 | && h->dynindx == -1) | |
4800 | { | |
4801 | if (! elf_link_record_dynamic_symbol (info, h)) | |
4802 | return false; | |
4803 | ||
4804 | /* If this is a weak defined symbol, and we know a corresponding | |
4805 | real symbol from the same dynamic object, make sure the real | |
4806 | symbol is also made into a dynamic symbol. */ | |
4807 | if (h->weakdef != NULL | |
4808 | && h->weakdef->dynindx == -1) | |
4809 | { | |
4810 | if (! elf_link_record_dynamic_symbol (info, h->weakdef)) | |
4811 | return false; | |
4812 | } | |
4813 | } | |
4814 | ||
4815 | return true; | |
4816 | } | |
4817 | ||
4818 | /* Array used to determine the number of hash table buckets to use | |
4819 | based on the number of symbols there are. If there are fewer than | |
4820 | 3 symbols we use 1 bucket, fewer than 17 symbols we use 3 buckets, | |
4821 | fewer than 37 we use 17 buckets, and so forth. We never use more | |
4822 | than 521 buckets. */ | |
4823 | ||
4824 | static const size_t elf_buckets[] = | |
4825 | { | |
4826 | 1, 3, 17, 37, 67, 97, 131, 197, 263, 521, 0 | |
4827 | }; | |
4828 | ||
4829 | /* Set up the sizes and contents of the ELF dynamic sections. This is | |
4830 | called by the ELF linker emulation before_allocation routine. We | |
4831 | must set the sizes of the sections before the linker sets the | |
4832 | addresses of the various sections. */ | |
4833 | ||
4834 | boolean | |
4835 | NAME(bfd_elf,size_dynamic_sections) (output_bfd, info) | |
4836 | bfd *output_bfd; | |
4837 | struct bfd_link_info *info; | |
4838 | { | |
4839 | bfd *dynobj; | |
4840 | size_t dynsymcount; | |
4841 | asection *s; | |
4842 | Elf_Internal_Sym isym; | |
4843 | size_t i; | |
4844 | size_t bucketcount; | |
4845 | struct elf_backend_data *bed; | |
4846 | ||
4847 | dynobj = elf_hash_table (info)->dynobj; | |
4848 | dynsymcount = elf_hash_table (info)->dynsymcount; | |
4849 | ||
4850 | /* If there were no dynamic objects in the link, there is nothing to | |
4851 | do here. */ | |
4852 | if (dynobj == NULL) | |
4853 | return true; | |
4854 | ||
4855 | /* Set the size of the .dynsym and .hash sections. We counted the | |
4856 | number of dynamic symbols in elf_link_add_object_symbols. We | |
4857 | will build the contents of .dynsym and .hash when we build the | |
4858 | final symbol table, because until then we do not know the correct | |
4859 | value to give the symbols. We built the .dynstr section as we | |
4860 | went along in elf_link_add_object_symbols. */ | |
4861 | s = bfd_get_section_by_name (dynobj, ".dynsym"); | |
4862 | BFD_ASSERT (s != NULL); | |
4863 | s->_raw_size = dynsymcount * sizeof (Elf_External_Sym); | |
4864 | s->contents = (bfd_byte *) bfd_alloc (output_bfd, s->_raw_size); | |
4865 | if (s->contents == NULL && s->_raw_size != 0) | |
4866 | { | |
4867 | bfd_set_error (bfd_error_no_memory); | |
4868 | return false; | |
4869 | } | |
4870 | ||
4871 | /* The first entry in .dynsym is a dummy symbol. */ | |
4872 | isym.st_value = 0; | |
4873 | isym.st_size = 0; | |
4874 | isym.st_name = 0; | |
4875 | isym.st_info = 0; | |
4876 | isym.st_other = 0; | |
4877 | isym.st_shndx = 0; | |
4878 | elf_swap_symbol_out (output_bfd, &isym, | |
4879 | (Elf_External_Sym *) s->contents); | |
4880 | ||
4881 | for (i = 0; elf_buckets[i] != 0; i++) | |
4882 | { | |
4883 | bucketcount = elf_buckets[i]; | |
4884 | if (dynsymcount < elf_buckets[i + 1]) | |
4885 | break; | |
4886 | } | |
4887 | ||
4888 | s = bfd_get_section_by_name (dynobj, ".hash"); | |
4889 | BFD_ASSERT (s != NULL); | |
4890 | s->_raw_size = (2 + bucketcount + dynsymcount) * (ARCH_SIZE / 8); | |
4891 | s->contents = (bfd_byte *) bfd_alloc (output_bfd, s->_raw_size); | |
4892 | if (s->contents == NULL) | |
4893 | { | |
4894 | bfd_set_error (bfd_error_no_memory); | |
4895 | return false; | |
4896 | } | |
4897 | memset (s->contents, 0, s->_raw_size); | |
4898 | ||
4899 | put_word (output_bfd, bucketcount, s->contents); | |
4900 | put_word (output_bfd, dynsymcount, s->contents + (ARCH_SIZE / 8)); | |
4901 | ||
4902 | elf_hash_table (info)->bucketcount = bucketcount; | |
4903 | ||
4904 | s = bfd_get_section_by_name (dynobj, ".dynstr"); | |
4905 | BFD_ASSERT (s != NULL); | |
4906 | s->_raw_size = elf_hash_table (info)->dynstr->length; | |
4907 | s->contents = (unsigned char *) elf_hash_table (info)->dynstr->tab; | |
4908 | ||
4909 | /* Find all symbols which were defined in a dynamic object and make | |
4910 | the backend pick a reasonable value for them. */ | |
4911 | elf_link_hash_traverse (elf_hash_table (info), | |
4912 | elf_adjust_dynamic_symbol, | |
4913 | (PTR) info); | |
4914 | ||
4915 | /* Add some entries to the .dynamic section. We fill in some of the | |
4916 | values later, in elf_bfd_final_link, but we must add the entries | |
4917 | now so that we know the final size of the .dynamic section. */ | |
4918 | if (bfd_get_section_by_name (output_bfd, ".init") != NULL) | |
4919 | { | |
4920 | if (! elf_add_dynamic_entry (info, DT_INIT, 0)) | |
4921 | return false; | |
4922 | } | |
4923 | if (bfd_get_section_by_name (output_bfd, ".fini") != NULL) | |
4924 | { | |
4925 | if (! elf_add_dynamic_entry (info, DT_FINI, 0)) | |
4926 | return false; | |
4927 | } | |
4928 | if (! elf_add_dynamic_entry (info, DT_HASH, 0) | |
4929 | || ! elf_add_dynamic_entry (info, DT_STRTAB, 0) | |
4930 | || ! elf_add_dynamic_entry (info, DT_SYMTAB, 0) | |
4931 | || ! elf_add_dynamic_entry (info, DT_STRSZ, | |
4932 | elf_hash_table (info)->dynstr->length) | |
4933 | || ! elf_add_dynamic_entry (info, DT_SYMENT, | |
4934 | sizeof (Elf_External_Sym))) | |
4935 | return false; | |
4936 | ||
4937 | /* The backend must work out the sizes of all the other dynamic | |
4938 | sections. */ | |
4939 | bed = get_elf_backend_data (output_bfd); | |
4940 | if (! (*bed->elf_backend_size_dynamic_sections) (output_bfd, info)) | |
4941 | return false; | |
4942 | ||
4943 | return elf_add_dynamic_entry (info, DT_NULL, 0); | |
4944 | } | |
4945 | ||
4946 | /* Make the backend pick a good value for a dynamic symbol. This is | |
4947 | called via elf_link_hash_traverse, and also calls itself | |
4948 | recursively. */ | |
4949 | ||
4950 | static boolean | |
4951 | elf_adjust_dynamic_symbol (h, data) | |
4952 | struct elf_link_hash_entry *h; | |
4953 | PTR data; | |
4954 | { | |
4955 | struct bfd_link_info *info = (struct bfd_link_info *) data; | |
4956 | bfd *dynobj; | |
4957 | struct elf_backend_data *bed; | |
4958 | ||
4959 | /* If this symbol is not defined by a dynamic object, or is not | |
4960 | referenced by a regular object, ignore it. FIXME: Do we need to | |
4961 | worry about symbols which are defined by one dynamic object and | |
4962 | referenced by another one? */ | |
4963 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0 | |
4964 | || (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0 | |
4965 | || (h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) == 0) | |
4966 | return true; | |
4967 | ||
4968 | /* If we've already adjusted this symbol, don't do it again. This | |
4969 | can happen via a recursive call. */ | |
4970 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DYNAMIC_ADJUSTED) != 0) | |
4971 | return true; | |
4972 | ||
4973 | /* Don't look at this symbol again. Note that we must set this | |
4974 | after checking the above conditions, because we may look at a | |
4975 | symbol once, decide not to do anything, and then get called | |
4976 | recursively later after REF_REGULAR is set below. */ | |
4977 | h->elf_link_hash_flags |= ELF_LINK_HASH_DYNAMIC_ADJUSTED; | |
4978 | ||
4979 | /* If this is a weak definition, and we know a real definition, and | |
4980 | the real symbol is not itself defined by a regular object file, | |
4981 | then get a good value for the real definition. We handle the | |
4982 | real symbol first, for the convenience of the backend routine. | |
4983 | ||
4984 | Note that there is a confusing case here. If the real definition | |
4985 | is defined by a regular object file, we don't get the real symbol | |
4986 | from the dynamic object, but we do get the weak symbol. If the | |
4987 | processor backend uses a COPY reloc, then if some routine in the | |
4988 | dynamic object changes the real symbol, we will not see that | |
4989 | change in the corresponding weak symbol. This is the way other | |
4990 | ELF linkers work as well, and seems to be a result of the shared | |
4991 | library model. | |
4992 | ||
4993 | I will clarify this issue. Most SVR4 shared libraries define the | |
4994 | variable _timezone and define timezone as a weak synonym. The | |
4995 | tzset call changes _timezone. If you write | |
4996 | extern int timezone; | |
4997 | int _timezone = 5; | |
4998 | int main () { tzset (); printf ("%d %d\n", timezone, _timezone); } | |
4999 | you might expect that, since timezone is a synonym for _timezone, | |
5000 | the same number will print both times. However, if the processor | |
5001 | backend uses a COPY reloc, then actually timezone will be copied | |
5002 | into your process image, and, since you define _timezone | |
5003 | yourself, _timezone will not. Thus timezone and _timezone will | |
5004 | wind up at different memory locations. The tzset call will set | |
5005 | _timezone, leaving timezone unchanged. */ | |
5006 | ||
5007 | if (h->weakdef != NULL) | |
5008 | { | |
5009 | struct elf_link_hash_entry *weakdef; | |
5010 | ||
5011 | BFD_ASSERT (h->root.type == bfd_link_hash_defined); | |
5012 | weakdef = h->weakdef; | |
5013 | BFD_ASSERT (weakdef->root.type == bfd_link_hash_defined); | |
5014 | BFD_ASSERT (weakdef->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC); | |
5015 | if ((weakdef->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0 | |
5016 | || (weakdef->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) == 0) | |
5017 | { | |
5018 | /* This symbol is defined or referenced by a regular object | |
5019 | file, so we will not do anything special. Clear weakdef | |
5020 | for the convenience of the processor backend. */ | |
5021 | h->weakdef = NULL; | |
5022 | } | |
5023 | else | |
5024 | { | |
5025 | /* There is an implicit reference by a regular object file | |
5026 | via the weak symbol. */ | |
5027 | weakdef->elf_link_hash_flags |= ELF_LINK_HASH_REF_REGULAR; | |
5028 | if (! elf_adjust_dynamic_symbol (weakdef, (PTR) info)) | |
5029 | return false; | |
5030 | } | |
5031 | } | |
5032 | ||
5033 | dynobj = elf_hash_table (info)->dynobj; | |
5034 | bed = get_elf_backend_data (dynobj); | |
5035 | if (! (*bed->elf_backend_adjust_dynamic_symbol) (info, h)) | |
5036 | { | |
5037 | /* FIXME: No way to return error. */ | |
5038 | abort (); | |
5039 | } | |
5040 | ||
5041 | return true; | |
5042 | } | |
6ec3bb6a ILT |
5043 | \f |
5044 | /* Final phase of ELF linker. */ | |
5045 | ||
5046 | /* A structure we use to avoid passing large numbers of arguments. */ | |
5047 | ||
5048 | struct elf_final_link_info | |
5049 | { | |
5050 | /* General link information. */ | |
5051 | struct bfd_link_info *info; | |
5052 | /* Output BFD. */ | |
5053 | bfd *output_bfd; | |
5054 | /* Symbol string table. */ | |
5055 | struct strtab *symstrtab; | |
013dec1a ILT |
5056 | /* .dynsym section. */ |
5057 | asection *dynsym_sec; | |
5058 | /* .hash section. */ | |
5059 | asection *hash_sec; | |
6ec3bb6a ILT |
5060 | /* Buffer large enough to hold contents of any section. */ |
5061 | bfd_byte *contents; | |
5062 | /* Buffer large enough to hold external relocs of any section. */ | |
5063 | PTR external_relocs; | |
5064 | /* Buffer large enough to hold internal relocs of any section. */ | |
5065 | Elf_Internal_Rela *internal_relocs; | |
5066 | /* Buffer large enough to hold external local symbols of any input | |
5067 | BFD. */ | |
5068 | Elf_External_Sym *external_syms; | |
5069 | /* Buffer large enough to hold internal local symbols of any input | |
5070 | BFD. */ | |
5071 | Elf_Internal_Sym *internal_syms; | |
5072 | /* Array large enough to hold a symbol index for each local symbol | |
5073 | of any input BFD. */ | |
5074 | long *indices; | |
5075 | /* Array large enough to hold a section pointer for each local | |
5076 | symbol of any input BFD. */ | |
5077 | asection **sections; | |
5078 | /* Buffer to hold swapped out symbols. */ | |
5079 | Elf_External_Sym *symbuf; | |
5080 | /* Number of swapped out symbols in buffer. */ | |
5081 | size_t symbuf_count; | |
5082 | /* Number of symbols which fit in symbuf. */ | |
5083 | size_t symbuf_size; | |
5084 | }; | |
5085 | ||
5086 | static boolean elf_link_output_sym | |
5087 | PARAMS ((struct elf_final_link_info *, const char *, Elf_Internal_Sym *)); | |
5088 | static boolean elf_link_flush_output_syms | |
5089 | PARAMS ((struct elf_final_link_info *)); | |
5090 | static boolean elf_link_output_extsym | |
5091 | PARAMS ((struct elf_link_hash_entry *, PTR)); | |
5092 | static boolean elf_link_input_bfd | |
5093 | PARAMS ((struct elf_final_link_info *, bfd *)); | |
5094 | static boolean elf_reloc_link_order | |
5095 | PARAMS ((bfd *, struct bfd_link_info *, asection *, | |
5096 | struct bfd_link_order *)); | |
5097 | ||
5098 | /* Do the final step of an ELF link. */ | |
5099 | ||
5100 | boolean | |
5101 | elf_bfd_final_link (abfd, info) | |
5102 | bfd *abfd; | |
5103 | struct bfd_link_info *info; | |
5104 | { | |
013dec1a | 5105 | bfd *dynobj; |
6ec3bb6a ILT |
5106 | struct elf_final_link_info finfo; |
5107 | register asection *o; | |
5108 | register struct bfd_link_order *p; | |
5109 | register bfd *sub; | |
5110 | size_t max_contents_size; | |
5111 | size_t max_external_reloc_size; | |
5112 | size_t max_internal_reloc_count; | |
5113 | size_t max_sym_count; | |
5114 | file_ptr off; | |
5115 | Elf_Internal_Sym elfsym; | |
013dec1a | 5116 | unsigned int i; |
6ec3bb6a ILT |
5117 | Elf_Internal_Shdr *symtab_hdr; |
5118 | Elf_Internal_Shdr *symstrtab_hdr; | |
5119 | ||
013dec1a ILT |
5120 | dynobj = elf_hash_table (info)->dynobj; |
5121 | ||
6ec3bb6a ILT |
5122 | finfo.info = info; |
5123 | finfo.output_bfd = abfd; | |
5124 | finfo.symstrtab = bfd_new_strtab (abfd); | |
5125 | if (finfo.symstrtab == NULL) | |
5126 | return false; | |
013dec1a ILT |
5127 | if (dynobj == NULL) |
5128 | { | |
5129 | finfo.dynsym_sec = NULL; | |
5130 | finfo.hash_sec = NULL; | |
5131 | } | |
5132 | else | |
5133 | { | |
5134 | finfo.dynsym_sec = bfd_get_section_by_name (dynobj, ".dynsym"); | |
5135 | finfo.hash_sec = bfd_get_section_by_name (dynobj, ".hash"); | |
5136 | if (finfo.dynsym_sec == NULL | |
5137 | || finfo.hash_sec == NULL) | |
5138 | abort (); | |
5139 | } | |
6ec3bb6a ILT |
5140 | finfo.contents = NULL; |
5141 | finfo.external_relocs = NULL; | |
5142 | finfo.internal_relocs = NULL; | |
5143 | finfo.external_syms = NULL; | |
5144 | finfo.internal_syms = NULL; | |
5145 | finfo.indices = NULL; | |
5146 | finfo.sections = NULL; | |
5147 | finfo.symbuf = NULL; | |
5148 | finfo.symbuf_count = 0; | |
5149 | ||
5150 | /* Count up the number of relocations we will output for each output | |
5151 | section, so that we know the sizes of the reloc sections. We | |
5152 | also figure out some maximum sizes. */ | |
5153 | max_contents_size = 0; | |
5154 | max_external_reloc_size = 0; | |
5155 | max_internal_reloc_count = 0; | |
5156 | max_sym_count = 0; | |
5157 | for (o = abfd->sections; o != (asection *) NULL; o = o->next) | |
5158 | { | |
5159 | o->reloc_count = 0; | |
5160 | ||
5161 | for (p = o->link_order_head; p != NULL; p = p->next) | |
5162 | { | |
5163 | if (p->type == bfd_section_reloc_link_order | |
5164 | || p->type == bfd_symbol_reloc_link_order) | |
5165 | ++o->reloc_count; | |
5166 | else if (p->type == bfd_indirect_link_order) | |
5167 | { | |
5168 | asection *sec; | |
5169 | ||
5170 | sec = p->u.indirect.section; | |
5171 | ||
5172 | if (info->relocateable) | |
5173 | o->reloc_count += sec->reloc_count; | |
5174 | ||
5175 | if (sec->_raw_size > max_contents_size) | |
5176 | max_contents_size = sec->_raw_size; | |
5177 | if (sec->_cooked_size > max_contents_size) | |
5178 | max_contents_size = sec->_cooked_size; | |
5179 | ||
5180 | /* We are interested in just local symbols, not all | |
5181 | symbols. */ | |
5182 | if (bfd_get_flavour (sec->owner) == bfd_target_elf_flavour | |
5183 | && (elf_tdata (sec->owner)->symtab_hdr.sh_info | |
5184 | > max_sym_count)) | |
5185 | max_sym_count = elf_tdata (sec->owner)->symtab_hdr.sh_info; | |
5186 | ||
5187 | if ((sec->flags & SEC_RELOC) != 0) | |
5188 | { | |
5189 | size_t ext_size; | |
5190 | ||
5191 | ext_size = elf_section_data (sec)->rel_hdr.sh_size; | |
5192 | if (ext_size > max_external_reloc_size) | |
5193 | max_external_reloc_size = ext_size; | |
5194 | if (sec->reloc_count > max_internal_reloc_count) | |
5195 | max_internal_reloc_count = sec->reloc_count; | |
5196 | } | |
5197 | } | |
5198 | } | |
5199 | ||
5200 | if (o->reloc_count > 0) | |
5201 | o->flags |= SEC_RELOC; | |
5202 | else | |
5203 | { | |
5204 | /* Explicitly clear the SEC_RELOC flag. The linker tends to | |
5205 | set it (this is probably a bug) and if it is set | |
5206 | assign_section_numbers will create a reloc section. */ | |
5207 | o->flags &=~ SEC_RELOC; | |
5208 | } | |
5209 | } | |
5210 | ||
5211 | /* Figure out the file positions for everything but the symbol table | |
5212 | and the relocs. We set symcount to force assign_section_numbers | |
5213 | to create a symbol table. */ | |
5214 | abfd->symcount = info->strip == strip_all ? 0 : 1; | |
5215 | BFD_ASSERT (! abfd->output_has_begun); | |
5216 | if (! elf_compute_section_file_positions (abfd, info)) | |
5217 | goto error_return; | |
5218 | ||
5219 | /* That created the reloc sections. Set their sizes, and assign | |
5220 | them file positions, and allocate some buffers. */ | |
5221 | for (o = abfd->sections; o != NULL; o = o->next) | |
5222 | { | |
5223 | if ((o->flags & SEC_RELOC) != 0) | |
5224 | { | |
5225 | Elf_Internal_Shdr *rel_hdr; | |
5226 | register struct elf_link_hash_entry **p, **pend; | |
5227 | ||
5228 | rel_hdr = &elf_section_data (o)->rel_hdr; | |
5229 | ||
5230 | rel_hdr->sh_size = rel_hdr->sh_entsize * o->reloc_count; | |
5231 | ||
5232 | /* The contents field must last into write_object_contents, | |
5233 | so we allocate it with bfd_alloc rather than malloc. */ | |
5234 | rel_hdr->contents = (PTR) bfd_alloc (abfd, rel_hdr->sh_size); | |
5235 | if (rel_hdr->contents == NULL && rel_hdr->sh_size != 0) | |
5236 | { | |
5237 | bfd_set_error (bfd_error_no_memory); | |
5238 | goto error_return; | |
5239 | } | |
5240 | ||
5241 | p = ((struct elf_link_hash_entry **) | |
5242 | malloc (o->reloc_count | |
5243 | * sizeof (struct elf_link_hash_entry *))); | |
5244 | if (p == NULL && o->reloc_count != 0) | |
5245 | { | |
5246 | bfd_set_error (bfd_error_no_memory); | |
5247 | goto error_return; | |
5248 | } | |
5249 | elf_section_data (o)->rel_hashes = p; | |
5250 | pend = p + o->reloc_count; | |
5251 | for (; p < pend; p++) | |
5252 | *p = NULL; | |
5253 | ||
5254 | /* Use the reloc_count field as an index when outputting the | |
5255 | relocs. */ | |
5256 | o->reloc_count = 0; | |
5257 | } | |
5258 | } | |
5259 | ||
5260 | assign_file_positions_for_relocs (abfd); | |
5261 | ||
5262 | /* We have now assigned file positions for all the sections except | |
5263 | .symtab and .strtab. We start the .symtab section at the current | |
5264 | file position, and write directly to it. We build the .strtab | |
5265 | section in memory. When we add .dynsym support, we will build | |
5266 | that in memory as well (.dynsym is smaller than .symtab). */ | |
5267 | abfd->symcount = 0; | |
5268 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
5269 | /* sh_name is set in prep_headers. */ | |
5270 | symtab_hdr->sh_type = SHT_SYMTAB; | |
5271 | symtab_hdr->sh_flags = 0; | |
5272 | symtab_hdr->sh_addr = 0; | |
5273 | symtab_hdr->sh_size = 0; | |
5274 | symtab_hdr->sh_entsize = sizeof (Elf_External_Sym); | |
5275 | /* sh_link is set in assign_section_numbers. */ | |
5276 | /* sh_info is set below. */ | |
5277 | /* sh_offset is set just below. */ | |
5278 | symtab_hdr->sh_addralign = 4; /* FIXME: system dependent? */ | |
5279 | ||
5280 | off = elf_tdata (abfd)->next_file_pos; | |
013dec1a | 5281 | off = assign_file_position_for_section (symtab_hdr, off, true); |
6ec3bb6a ILT |
5282 | |
5283 | /* Note that at this point elf_tdata (abfd)->next_file_pos is | |
5284 | incorrect. We do not yet know the size of the .symtab section. | |
5285 | We correct next_file_pos below, after we do know the size. */ | |
5286 | ||
5287 | /* Allocate a buffer to hold swapped out symbols. This is to avoid | |
5288 | continuously seeking to the right position in the file. */ | |
5289 | if (! info->keep_memory || max_sym_count < 20) | |
5290 | finfo.symbuf_size = 20; | |
5291 | else | |
5292 | finfo.symbuf_size = max_sym_count; | |
5293 | finfo.symbuf = ((Elf_External_Sym *) | |
5294 | malloc (finfo.symbuf_size * sizeof (Elf_External_Sym))); | |
5295 | if (finfo.symbuf == NULL) | |
5296 | { | |
5297 | bfd_set_error (bfd_error_no_memory); | |
5298 | goto error_return; | |
5299 | } | |
5300 | ||
5301 | /* Start writing out the symbol table. The first symbol is always a | |
5302 | dummy symbol. */ | |
5303 | elfsym.st_value = 0; | |
5304 | elfsym.st_size = 0; | |
5305 | elfsym.st_info = 0; | |
5306 | elfsym.st_other = 0; | |
5307 | elfsym.st_shndx = SHN_UNDEF; | |
5308 | if (! elf_link_output_sym (&finfo, (const char *) NULL, &elfsym)) | |
5309 | goto error_return; | |
5310 | ||
5311 | #if 0 | |
5312 | /* Some standard ELF linkers do this, but we don't because it causes | |
5313 | bootstrap comparison failures. */ | |
5314 | /* Output a file symbol for the output file as the second symbol. | |
5315 | We output this even if we are discarding local symbols, although | |
5316 | I'm not sure if this is correct. */ | |
5317 | elfsym.st_value = 0; | |
5318 | elfsym.st_size = 0; | |
5319 | elfsym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE); | |
5320 | elfsym.st_other = 0; | |
5321 | elfsym.st_shndx = SHN_ABS; | |
5322 | if (! elf_link_output_sym (&finfo, bfd_get_filename (abfd), &elfsym)) | |
5323 | goto error_return; | |
5324 | #endif | |
5325 | ||
5326 | /* Output a symbol for each section. We output these even if we are | |
5327 | discarding local symbols, since they are used for relocs. These | |
5328 | symbols have no names. We store the index of each one in the | |
5329 | index field of the section, so that we can find it again when | |
5330 | outputting relocs. */ | |
5331 | elfsym.st_value = 0; | |
5332 | elfsym.st_size = 0; | |
5333 | elfsym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION); | |
5334 | elfsym.st_other = 0; | |
013dec1a | 5335 | for (i = 1; i < elf_elfheader (abfd)->e_shnum; i++) |
6ec3bb6a | 5336 | { |
013dec1a ILT |
5337 | o = section_from_elf_index (abfd, i); |
5338 | if (o != &bfd_abs_section) | |
5339 | o->target_index = abfd->symcount; | |
5340 | elfsym.st_shndx = i; | |
6ec3bb6a ILT |
5341 | if (! elf_link_output_sym (&finfo, (const char *) NULL, &elfsym)) |
5342 | goto error_return; | |
5343 | } | |
5344 | ||
5345 | /* Allocate some memory to hold information read in from the input | |
5346 | files. */ | |
5347 | finfo.contents = (bfd_byte *) malloc (max_contents_size); | |
5348 | finfo.external_relocs = (PTR) malloc (max_external_reloc_size); | |
5349 | finfo.internal_relocs = ((Elf_Internal_Rela *) | |
5350 | malloc (max_internal_reloc_count | |
5351 | * sizeof (Elf_Internal_Rela))); | |
5352 | finfo.external_syms = ((Elf_External_Sym *) | |
5353 | malloc (max_sym_count * sizeof (Elf_External_Sym))); | |
5354 | finfo.internal_syms = ((Elf_Internal_Sym *) | |
5355 | malloc (max_sym_count * sizeof (Elf_Internal_Sym))); | |
5356 | finfo.indices = (long *) malloc (max_sym_count * sizeof (long)); | |
5357 | finfo.sections = (asection **) malloc (max_sym_count * sizeof (asection *)); | |
5358 | if ((finfo.contents == NULL && max_contents_size != 0) | |
5359 | || (finfo.external_relocs == NULL && max_external_reloc_size != 0) | |
5360 | || (finfo.internal_relocs == NULL && max_internal_reloc_count != 0) | |
5361 | || (finfo.external_syms == NULL && max_sym_count != 0) | |
5362 | || (finfo.internal_syms == NULL && max_sym_count != 0) | |
5363 | || (finfo.indices == NULL && max_sym_count != 0) | |
5364 | || (finfo.sections == NULL && max_sym_count != 0)) | |
5365 | { | |
5366 | bfd_set_error (bfd_error_no_memory); | |
5367 | goto error_return; | |
5368 | } | |
5369 | ||
5370 | /* Since ELF permits relocations to be against local symbols, we | |
5371 | must have the local symbols available when we do the relocations. | |
5372 | Since we would rather only read the local symbols once, and we | |
5373 | would rather not keep them in memory, we handle all the | |
5374 | relocations for a single input file at the same time. | |
5375 | ||
5376 | Unfortunately, there is no way to know the total number of local | |
5377 | symbols until we have seen all of them, and the local symbol | |
5378 | indices precede the global symbol indices. This means that when | |
5379 | we are generating relocateable output, and we see a reloc against | |
5380 | a global symbol, we can not know the symbol index until we have | |
5381 | finished examining all the local symbols to see which ones we are | |
5382 | going to output. To deal with this, we keep the relocations in | |
5383 | memory, and don't output them until the end of the link. This is | |
5384 | an unfortunate waste of memory, but I don't see a good way around | |
5385 | it. Fortunately, it only happens when performing a relocateable | |
5386 | link, which is not the common case. FIXME: If keep_memory is set | |
5387 | we could write the relocs out and then read them again; I don't | |
5388 | know how bad the memory loss will be. */ | |
5389 | ||
5390 | for (sub = info->input_bfds; sub != NULL; sub = sub->next) | |
5391 | sub->output_has_begun = false; | |
5392 | for (o = abfd->sections; o != NULL; o = o->next) | |
5393 | { | |
5394 | for (p = o->link_order_head; p != NULL; p = p->next) | |
5395 | { | |
5396 | if (p->type == bfd_indirect_link_order | |
5397 | && (bfd_get_flavour (p->u.indirect.section->owner) | |
5398 | == bfd_target_elf_flavour)) | |
5399 | { | |
5400 | sub = p->u.indirect.section->owner; | |
5401 | if (! sub->output_has_begun) | |
5402 | { | |
5403 | if (! elf_link_input_bfd (&finfo, sub)) | |
5404 | goto error_return; | |
5405 | sub->output_has_begun = true; | |
5406 | } | |
5407 | } | |
5408 | else if (p->type == bfd_section_reloc_link_order | |
5409 | || p->type == bfd_symbol_reloc_link_order) | |
5410 | { | |
5411 | if (! elf_reloc_link_order (abfd, info, o, p)) | |
5412 | goto error_return; | |
5413 | } | |
5414 | else | |
5415 | { | |
5416 | if (! _bfd_default_link_order (abfd, info, o, p)) | |
5417 | goto error_return; | |
5418 | } | |
5419 | } | |
5420 | } | |
5421 | ||
5422 | /* That wrote out all the local symbols. Finish up the symbol table | |
5423 | with the global symbols. */ | |
5424 | ||
5425 | /* The sh_info field records the index of the first non local | |
5426 | symbol. */ | |
5427 | symtab_hdr->sh_info = abfd->symcount; | |
013dec1a ILT |
5428 | if (dynobj != NULL) |
5429 | elf_section_data (finfo.dynsym_sec->output_section)->this_hdr.sh_info = 1; | |
6ec3bb6a ILT |
5430 | |
5431 | /* We get the global symbols from the hash table. */ | |
013dec1a ILT |
5432 | elf_link_hash_traverse (elf_hash_table (info), elf_link_output_extsym, |
5433 | (PTR) &finfo); | |
6ec3bb6a ILT |
5434 | |
5435 | /* Flush all symbols to the file. */ | |
5436 | if (! elf_link_flush_output_syms (&finfo)) | |
5437 | return false; | |
5438 | ||
5439 | /* Now we know the size of the symtab section. */ | |
5440 | off += symtab_hdr->sh_size; | |
5441 | ||
5442 | /* Finish up the symbol string table (.strtab) section. */ | |
5443 | symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr; | |
5444 | /* sh_name was set in prep_headers. */ | |
5445 | symstrtab_hdr->sh_type = SHT_STRTAB; | |
5446 | symstrtab_hdr->sh_flags = 0; | |
5447 | symstrtab_hdr->sh_addr = 0; | |
5448 | symstrtab_hdr->sh_size = finfo.symstrtab->length; | |
5449 | symstrtab_hdr->sh_entsize = 0; | |
5450 | symstrtab_hdr->sh_link = 0; | |
5451 | symstrtab_hdr->sh_info = 0; | |
5452 | /* sh_offset is set just below. */ | |
5453 | symstrtab_hdr->sh_addralign = 1; | |
5454 | symstrtab_hdr->contents = (PTR) finfo.symstrtab->tab; | |
5455 | ||
013dec1a | 5456 | off = assign_file_position_for_section (symstrtab_hdr, off, true); |
6ec3bb6a ILT |
5457 | elf_tdata (abfd)->next_file_pos = off; |
5458 | ||
5459 | /* Adjust the relocs to have the correct symbol indices. */ | |
5460 | for (o = abfd->sections; o != NULL; o = o->next) | |
5461 | { | |
5462 | struct elf_link_hash_entry **rel_hash; | |
5463 | Elf_Internal_Shdr *rel_hdr; | |
6ec3bb6a ILT |
5464 | |
5465 | if ((o->flags & SEC_RELOC) == 0) | |
5466 | continue; | |
5467 | ||
5468 | rel_hash = elf_section_data (o)->rel_hashes; | |
5469 | rel_hdr = &elf_section_data (o)->rel_hdr; | |
5470 | for (i = 0; i < o->reloc_count; i++, rel_hash++) | |
5471 | { | |
5472 | if (*rel_hash == NULL) | |
5473 | continue; | |
5474 | ||
5475 | BFD_ASSERT ((*rel_hash)->indx >= 0); | |
5476 | ||
5477 | if (rel_hdr->sh_entsize == sizeof (Elf_External_Rel)) | |
5478 | { | |
5479 | Elf_External_Rel *erel; | |
5480 | Elf_Internal_Rel irel; | |
5481 | ||
5482 | erel = (Elf_External_Rel *) rel_hdr->contents + i; | |
5483 | elf_swap_reloc_in (abfd, erel, &irel); | |
5484 | irel.r_info = ELF_R_INFO ((*rel_hash)->indx, | |
5485 | ELF_R_TYPE (irel.r_info)); | |
5486 | elf_swap_reloc_out (abfd, &irel, erel); | |
5487 | } | |
5488 | else | |
5489 | { | |
5490 | Elf_External_Rela *erela; | |
5491 | Elf_Internal_Rela irela; | |
5492 | ||
5493 | BFD_ASSERT (rel_hdr->sh_entsize | |
5494 | == sizeof (Elf_External_Rela)); | |
5495 | ||
5496 | erela = (Elf_External_Rela *) rel_hdr->contents + i; | |
5497 | elf_swap_reloca_in (abfd, erela, &irela); | |
5498 | irela.r_info = ELF_R_INFO ((*rel_hash)->indx, | |
5499 | ELF_R_TYPE (irela.r_info)); | |
5500 | elf_swap_reloca_out (abfd, &irela, erela); | |
5501 | } | |
5502 | } | |
5503 | ||
5504 | /* Set the reloc_count field to 0 to prevent write_relocs from | |
5505 | trying to swap the relocs out itself. */ | |
5506 | o->reloc_count = 0; | |
5507 | } | |
5508 | ||
013dec1a ILT |
5509 | /* If we are linking against a dynamic object, finish up the dynamic |
5510 | linking information. */ | |
5511 | if (dynobj != NULL) | |
5512 | { | |
5513 | Elf_External_Dyn *dyncon, *dynconend; | |
5514 | struct elf_backend_data *bed; | |
5515 | ||
5516 | /* Fix up .dynamic entries. */ | |
5517 | o = bfd_get_section_by_name (dynobj, ".dynamic"); | |
5518 | BFD_ASSERT (o != NULL); | |
5519 | ||
5520 | dyncon = (Elf_External_Dyn *) o->contents; | |
5521 | dynconend = (Elf_External_Dyn *) (o->contents + o->_raw_size); | |
5522 | for (; dyncon < dynconend; dyncon++) | |
5523 | { | |
5524 | Elf_Internal_Dyn dyn; | |
5525 | const char *name; | |
5526 | unsigned int type; | |
5527 | ||
5528 | elf_swap_dyn_in (dynobj, dyncon, &dyn); | |
5529 | ||
5530 | switch (dyn.d_tag) | |
5531 | { | |
5532 | default: | |
5533 | break; | |
5534 | ||
5535 | case DT_INIT: | |
5536 | name = ".init"; | |
5537 | goto get_vma; | |
5538 | case DT_FINI: | |
5539 | name = ".fini"; | |
5540 | goto get_vma; | |
5541 | case DT_HASH: | |
5542 | name = ".hash"; | |
5543 | goto get_vma; | |
5544 | case DT_STRTAB: | |
5545 | name = ".dynstr"; | |
5546 | goto get_vma; | |
5547 | case DT_SYMTAB: | |
5548 | name = ".dynsym"; | |
5549 | get_vma: | |
5550 | o = bfd_get_section_by_name (abfd, name); | |
5551 | BFD_ASSERT (o != NULL); | |
5552 | dyn.d_un.d_ptr = o->vma; | |
5553 | elf_swap_dyn_out (dynobj, &dyn, dyncon); | |
5554 | break; | |
5555 | ||
5556 | case DT_REL: | |
5557 | case DT_RELA: | |
5558 | case DT_RELSZ: | |
5559 | case DT_RELASZ: | |
5560 | if (dyn.d_tag == DT_REL || dyn.d_tag == DT_RELSZ) | |
5561 | type = SHT_REL; | |
5562 | else | |
5563 | type = SHT_RELA; | |
5564 | dyn.d_un.d_val = 0; | |
5565 | for (i = 1; i < elf_elfheader (abfd)->e_shnum; i++) | |
5566 | { | |
5567 | Elf_Internal_Shdr *hdr; | |
5568 | ||
5569 | hdr = elf_elfsections (abfd)[i]; | |
5570 | if (hdr->sh_type == type | |
5571 | && (hdr->sh_flags & SHF_ALLOC) != 0) | |
5572 | { | |
5573 | if (dyn.d_tag == DT_RELSZ || dyn.d_tag == DT_RELASZ) | |
5574 | dyn.d_un.d_val += hdr->sh_size; | |
5575 | else | |
5576 | { | |
5577 | if (dyn.d_un.d_val == 0 | |
5578 | || hdr->sh_addr < dyn.d_un.d_val) | |
5579 | dyn.d_un.d_val = hdr->sh_addr; | |
5580 | } | |
5581 | } | |
5582 | } | |
5583 | elf_swap_dyn_out (dynobj, &dyn, dyncon); | |
5584 | break; | |
5585 | } | |
5586 | } | |
5587 | ||
5588 | bed = get_elf_backend_data (abfd); | |
5589 | if (! (*bed->elf_backend_finish_dynamic_sections) (abfd, info)) | |
5590 | goto error_return; | |
5591 | ||
5592 | for (o = dynobj->sections; o != NULL; o = o->next) | |
5593 | { | |
5594 | Elf_Internal_Shdr *hdr; | |
5595 | asection *s; | |
5596 | const char *name; | |
5597 | ||
5598 | if ((o->flags & SEC_HAS_CONTENTS) == 0) | |
5599 | continue; | |
5600 | BFD_ASSERT ((o->flags & SEC_IN_MEMORY) != 0); | |
5601 | if (! bfd_set_section_contents (abfd, o->output_section, | |
5602 | o->contents, o->output_offset, | |
5603 | o->_raw_size)) | |
5604 | goto error_return; | |
5605 | ||
5606 | hdr = &elf_section_data (o->output_section)->this_hdr; | |
5607 | switch (hdr->sh_type) | |
5608 | { | |
5609 | case SHT_DYNAMIC: | |
5610 | s = bfd_get_section_by_name (abfd, ".dynstr"); | |
5611 | hdr->sh_link = elf_section_data (s)->this_idx; | |
5612 | hdr->sh_entsize = sizeof (Elf_External_Dyn); | |
5613 | break; | |
5614 | ||
5615 | case SHT_HASH: | |
5616 | s = finfo.dynsym_sec->output_section; | |
5617 | hdr->sh_link = elf_section_data (s)->this_idx; | |
5618 | hdr->sh_entsize = ARCH_SIZE / 8; | |
5619 | break; | |
5620 | ||
5621 | case SHT_DYNSYM: | |
5622 | s = bfd_get_section_by_name (abfd, ".dynstr"); | |
5623 | hdr->sh_link = elf_section_data (s)->this_idx; | |
5624 | hdr->sh_entsize = sizeof (Elf_External_Sym); | |
5625 | break; | |
5626 | ||
5627 | case SHT_REL: | |
5628 | case SHT_RELA: | |
5629 | name = bfd_get_section_name (abfd, o->output_section); | |
5630 | s = finfo.dynsym_sec->output_section; | |
5631 | hdr->sh_link = elf_section_data (s)->this_idx; | |
5632 | if (hdr->sh_type == SHT_REL) | |
5633 | { | |
5634 | name += 4; | |
5635 | hdr->sh_entsize = sizeof (Elf_External_Rel); | |
5636 | } | |
5637 | else | |
5638 | { | |
5639 | name += 5; | |
5640 | hdr->sh_entsize = sizeof (Elf_External_Rela); | |
5641 | } | |
5642 | s = bfd_get_section_by_name (abfd, name); | |
5643 | if (s != NULL) | |
5644 | hdr->sh_info = elf_section_data (s)->this_idx; | |
5645 | break; | |
5646 | } | |
5647 | } | |
5648 | } | |
5649 | ||
6ec3bb6a ILT |
5650 | if (finfo.contents != NULL) |
5651 | free (finfo.contents); | |
5652 | if (finfo.external_relocs != NULL) | |
5653 | free (finfo.external_relocs); | |
5654 | if (finfo.internal_relocs != NULL) | |
5655 | free (finfo.internal_relocs); | |
5656 | if (finfo.external_syms != NULL) | |
5657 | free (finfo.external_syms); | |
5658 | if (finfo.internal_syms != NULL) | |
5659 | free (finfo.internal_syms); | |
5660 | if (finfo.indices != NULL) | |
5661 | free (finfo.indices); | |
5662 | if (finfo.sections != NULL) | |
5663 | free (finfo.sections); | |
5664 | if (finfo.symbuf != NULL) | |
5665 | free (finfo.symbuf); | |
5666 | for (o = abfd->sections; o != NULL; o = o->next) | |
5667 | { | |
5668 | if ((o->flags & SEC_RELOC) != 0 | |
5669 | && elf_section_data (o)->rel_hashes != NULL) | |
5670 | free (elf_section_data (o)->rel_hashes); | |
5671 | } | |
5672 | ||
5673 | return true; | |
5674 | ||
5675 | error_return: | |
5676 | if (finfo.contents != NULL) | |
5677 | free (finfo.contents); | |
5678 | if (finfo.external_relocs != NULL) | |
5679 | free (finfo.external_relocs); | |
5680 | if (finfo.internal_relocs != NULL) | |
5681 | free (finfo.internal_relocs); | |
5682 | if (finfo.external_syms != NULL) | |
5683 | free (finfo.external_syms); | |
5684 | if (finfo.internal_syms != NULL) | |
5685 | free (finfo.internal_syms); | |
5686 | if (finfo.indices != NULL) | |
5687 | free (finfo.indices); | |
5688 | if (finfo.sections != NULL) | |
5689 | free (finfo.sections); | |
5690 | if (finfo.symbuf != NULL) | |
5691 | free (finfo.symbuf); | |
5692 | for (o = abfd->sections; o != NULL; o = o->next) | |
5693 | { | |
5694 | if ((o->flags & SEC_RELOC) != 0 | |
5695 | && elf_section_data (o)->rel_hashes != NULL) | |
5696 | free (elf_section_data (o)->rel_hashes); | |
5697 | } | |
5698 | ||
5699 | return false; | |
5700 | } | |
5701 | ||
5702 | /* Add a symbol to the output symbol table. */ | |
5703 | ||
5704 | static boolean | |
5705 | elf_link_output_sym (finfo, name, elfsym) | |
5706 | struct elf_final_link_info *finfo; | |
5707 | const char *name; | |
5708 | Elf_Internal_Sym *elfsym; | |
5709 | { | |
5710 | if (name == (const char *) NULL || *name == '\0') | |
5711 | elfsym->st_name = 0; | |
5712 | else | |
5713 | { | |
5714 | elfsym->st_name = bfd_add_to_strtab (finfo->output_bfd, | |
5715 | finfo->symstrtab, name); | |
5716 | if (elfsym->st_name == (unsigned long) -1) | |
5717 | return false; | |
5718 | } | |
5719 | ||
5720 | if (finfo->symbuf_count >= finfo->symbuf_size) | |
5721 | { | |
5722 | if (! elf_link_flush_output_syms (finfo)) | |
5723 | return false; | |
5724 | } | |
5725 | ||
5726 | elf_swap_symbol_out (finfo->output_bfd, elfsym, | |
5727 | finfo->symbuf + finfo->symbuf_count); | |
5728 | ++finfo->symbuf_count; | |
5729 | ||
5730 | ++finfo->output_bfd->symcount; | |
5731 | ||
5732 | return true; | |
5733 | } | |
5734 | ||
5735 | /* Flush the output symbols to the file. */ | |
5736 | ||
5737 | static boolean | |
5738 | elf_link_flush_output_syms (finfo) | |
5739 | struct elf_final_link_info *finfo; | |
5740 | { | |
5741 | Elf_Internal_Shdr *symtab; | |
5742 | ||
5743 | symtab = &elf_tdata (finfo->output_bfd)->symtab_hdr; | |
5744 | ||
5745 | if (bfd_seek (finfo->output_bfd, symtab->sh_offset + symtab->sh_size, | |
5746 | SEEK_SET) != 0 | |
5747 | || (bfd_write ((PTR) finfo->symbuf, finfo->symbuf_count, | |
5748 | sizeof (Elf_External_Sym), finfo->output_bfd) | |
5749 | != finfo->symbuf_count * sizeof (Elf_External_Sym))) | |
5750 | return false; | |
5751 | ||
5752 | symtab->sh_size += finfo->symbuf_count * sizeof (Elf_External_Sym); | |
5753 | ||
5754 | finfo->symbuf_count = 0; | |
5755 | ||
5756 | return true; | |
5757 | } | |
5758 | ||
5759 | /* Add an external symbol to the symbol table. This is called from | |
5760 | the hash table traversal routine. */ | |
5761 | ||
5762 | static boolean | |
5763 | elf_link_output_extsym (h, data) | |
5764 | struct elf_link_hash_entry *h; | |
5765 | PTR data; | |
5766 | { | |
5767 | struct elf_final_link_info *finfo = (struct elf_final_link_info *) data; | |
013dec1a | 5768 | boolean strip; |
6ec3bb6a ILT |
5769 | Elf_Internal_Sym sym; |
5770 | ||
013dec1a ILT |
5771 | /* We don't want to output symbols that have never been mentioned by |
5772 | a regular file, or that we have been told to strip. However, if | |
5773 | h->indx is set to -2, the symbol is used by a reloc and we must | |
5774 | output it. */ | |
5775 | if (h->indx == -2) | |
5776 | strip = false; | |
5777 | else if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0 | |
5778 | && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) == 0) | |
5779 | strip = true; | |
5780 | else if (finfo->info->strip == strip_all | |
5781 | || (finfo->info->strip == strip_some | |
5782 | && bfd_hash_lookup (finfo->info->keep_hash, | |
5783 | h->root.root.string, | |
5784 | false, false) == NULL)) | |
5785 | strip = true; | |
5786 | else | |
5787 | strip = false; | |
5788 | ||
5789 | /* If we're stripping it, and it's not a dynamic symbol, there's | |
5790 | nothing else to do. */ | |
5791 | if (strip && h->dynindx == -1) | |
6ec3bb6a ILT |
5792 | return true; |
5793 | ||
5794 | sym.st_value = 0; | |
5795 | sym.st_size = h->size; | |
5796 | sym.st_info = ELF_ST_INFO (STB_GLOBAL, h->type); | |
5797 | sym.st_other = 0; | |
5798 | ||
5799 | switch (h->root.type) | |
5800 | { | |
5801 | default: | |
5802 | case bfd_link_hash_new: | |
5803 | abort (); | |
5804 | return false; | |
5805 | ||
5806 | case bfd_link_hash_undefined: | |
5807 | sym.st_shndx = SHN_UNDEF; | |
5808 | break; | |
5809 | ||
5810 | case bfd_link_hash_weak: | |
5811 | sym.st_shndx = SHN_UNDEF; | |
5812 | sym.st_info = ELF_ST_INFO (STB_WEAK, h->type); | |
5813 | break; | |
5814 | ||
5815 | case bfd_link_hash_defined: | |
5816 | { | |
5817 | asection *sec; | |
5818 | ||
5819 | sec = h->root.u.def.section; | |
013dec1a | 5820 | if (sec->output_section != NULL) |
6ec3bb6a | 5821 | { |
013dec1a ILT |
5822 | sym.st_shndx = elf_section_from_bfd_section (finfo->output_bfd, |
5823 | sec->output_section); | |
5824 | if (sym.st_shndx == (unsigned short) -1) | |
5825 | { | |
5826 | /* FIXME: No way to handle errors. */ | |
5827 | abort (); | |
5828 | } | |
6ec3bb6a | 5829 | |
013dec1a ILT |
5830 | /* ELF symbols in relocateable files are section relative, |
5831 | but in nonrelocateable files they are virtual | |
5832 | addresses. */ | |
5833 | sym.st_value = h->root.u.def.value + sec->output_offset; | |
5834 | if (! finfo->info->relocateable) | |
5835 | sym.st_value += sec->output_section->vma; | |
5836 | } | |
5837 | else | |
5838 | { | |
5839 | BFD_ASSERT (bfd_get_flavour (sec->owner) == bfd_target_elf_flavour | |
5840 | && elf_elfheader (sec->owner)->e_type == ET_DYN); | |
5841 | sym.st_shndx = SHN_UNDEF; | |
5842 | } | |
6ec3bb6a ILT |
5843 | } |
5844 | break; | |
5845 | ||
5846 | case bfd_link_hash_common: | |
5847 | sym.st_shndx = SHN_COMMON; | |
5848 | if (h->align == 0) | |
5849 | sym.st_value = 1; | |
5850 | else | |
5851 | sym.st_value = h->align; | |
5852 | break; | |
5853 | ||
5854 | case bfd_link_hash_indirect: | |
5855 | case bfd_link_hash_warning: | |
5856 | /* I have no idea how these should be handled. */ | |
5857 | return true; | |
5858 | } | |
5859 | ||
013dec1a ILT |
5860 | /* If this symbol should be put in the .dynsym section, then put it |
5861 | there now. We have already know the symbol index. We also fill | |
5862 | in the entry in the .hash section. */ | |
5863 | if (h->dynindx != -1) | |
5864 | { | |
5865 | struct elf_backend_data *bed; | |
5866 | size_t bucketcount; | |
5867 | size_t bucket; | |
5868 | bfd_byte *bucketpos; | |
5869 | bfd_vma chain; | |
5870 | ||
5871 | sym.st_name = h->dynstr_index; | |
5872 | ||
5873 | /* Give the processor backend a chance to tweak the symbol | |
5874 | value, and also to finish up anything that needs to be done | |
5875 | for this symbol. */ | |
5876 | bed = get_elf_backend_data (finfo->output_bfd); | |
5877 | if (! ((*bed->elf_backend_finish_dynamic_symbol) | |
5878 | (finfo->output_bfd, finfo->info, h, &sym))) | |
5879 | { | |
5880 | /* FIXME: No way to return error. */ | |
5881 | abort (); | |
5882 | } | |
5883 | ||
5884 | elf_swap_symbol_out (finfo->output_bfd, &sym, | |
5885 | ((Elf_External_Sym *) finfo->dynsym_sec->contents | |
5886 | + h->dynindx)); | |
5887 | ||
5888 | bucketcount = elf_hash_table (finfo->info)->bucketcount; | |
5889 | bucket = bfd_elf_hash (h->root.root.string) % bucketcount; | |
5890 | bucketpos = ((bfd_byte *) finfo->hash_sec->contents | |
5891 | + (bucket + 2) * (ARCH_SIZE / 8)); | |
5892 | chain = get_word (finfo->output_bfd, bucketpos); | |
5893 | put_word (finfo->output_bfd, h->dynindx, bucketpos); | |
5894 | put_word (finfo->output_bfd, chain, | |
5895 | ((bfd_byte *) finfo->hash_sec->contents | |
5896 | + (bucketcount + 2 + h->dynindx) * (ARCH_SIZE / 8))); | |
5897 | } | |
5898 | ||
5899 | /* If we're stripping it, then it was just a dynamic symbol, and | |
5900 | there's nothing else to do. */ | |
5901 | if (strip) | |
5902 | return true; | |
5903 | ||
6ec3bb6a ILT |
5904 | h->indx = finfo->output_bfd->symcount; |
5905 | ||
5906 | if (! elf_link_output_sym (finfo, h->root.root.string, &sym)) | |
5907 | { | |
5908 | /* FIXME: No way to return error. */ | |
5909 | abort (); | |
5910 | } | |
5911 | ||
5912 | return true; | |
5913 | } | |
5914 | ||
5915 | /* Link an input file into the linker output file. This function | |
5916 | handles all the sections and relocations of the input file at once. | |
5917 | This is so that we only have to read the local symbols once, and | |
5918 | don't have to keep them in memory. */ | |
5919 | ||
5920 | static boolean | |
5921 | elf_link_input_bfd (finfo, input_bfd) | |
5922 | struct elf_final_link_info *finfo; | |
5923 | bfd *input_bfd; | |
5924 | { | |
5925 | boolean (*relocate_section) PARAMS ((bfd *, struct bfd_link_info *, | |
5926 | bfd *, asection *, bfd_byte *, | |
5927 | Elf_Internal_Rela *, | |
5928 | Elf_Internal_Sym *, | |
5929 | asection **)); | |
5930 | bfd *output_bfd; | |
5931 | Elf_Internal_Shdr *symtab_hdr; | |
5932 | Elf_External_Sym *esym; | |
5933 | Elf_External_Sym *esymend; | |
5934 | Elf_Internal_Sym *isym; | |
5935 | long *pindex; | |
5936 | asection **ppsection; | |
5937 | asection *o; | |
5938 | ||
5939 | output_bfd = finfo->output_bfd; | |
5940 | relocate_section = | |
5941 | get_elf_backend_data (output_bfd)->elf_backend_relocate_section; | |
5942 | ||
013dec1a ILT |
5943 | /* If this is a dynamic object, we don't want to do anything here: |
5944 | we don't want the local symbols, and we don't want the section | |
5945 | contents. */ | |
5946 | if (elf_elfheader (input_bfd)->e_type == ET_DYN) | |
5947 | return true; | |
5948 | ||
6ec3bb6a ILT |
5949 | /* Read the local symbols. */ |
5950 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
5951 | if (bfd_seek (input_bfd, symtab_hdr->sh_offset, SEEK_SET) != 0 | |
5952 | || (bfd_read (finfo->external_syms, sizeof (Elf_External_Sym), | |
5953 | symtab_hdr->sh_info, input_bfd) | |
5954 | != symtab_hdr->sh_info * sizeof (Elf_External_Sym))) | |
5955 | return false; | |
5956 | ||
5957 | /* Swap in the local symbols and write out the ones which we know | |
5958 | are going into the output file. */ | |
5959 | esym = finfo->external_syms; | |
5960 | esymend = esym + symtab_hdr->sh_info; | |
5961 | isym = finfo->internal_syms; | |
5962 | pindex = finfo->indices; | |
5963 | ppsection = finfo->sections; | |
5964 | for (; esym < esymend; esym++, isym++, pindex++, ppsection++) | |
5965 | { | |
5966 | asection *isec; | |
5967 | const char *name; | |
5968 | bfd_vma oldval; | |
5969 | ||
5970 | elf_swap_symbol_in (input_bfd, esym, isym); | |
5971 | *pindex = -1; | |
5972 | ||
5973 | if (isym->st_shndx == SHN_UNDEF) | |
5974 | isec = &bfd_und_section; | |
5975 | else if (isym->st_shndx > 0 && isym->st_shndx < SHN_LORESERVE) | |
5976 | { | |
5977 | isec = section_from_elf_index (input_bfd, isym->st_shndx); | |
5978 | if (isec == NULL) | |
5979 | return false; | |
5980 | } | |
5981 | else if (isym->st_shndx == SHN_ABS) | |
5982 | isec = &bfd_abs_section; | |
5983 | else if (isym->st_shndx == SHN_COMMON) | |
5984 | isec = &bfd_com_section; | |
5985 | else | |
5986 | { | |
5987 | /* Who knows? */ | |
5988 | isec = NULL; | |
5989 | } | |
5990 | ||
5991 | *ppsection = isec; | |
5992 | ||
5993 | /* Don't output the first, undefined, symbol. */ | |
5994 | if (esym == finfo->external_syms) | |
5995 | continue; | |
5996 | ||
5997 | /* If we are stripping all symbols, we don't want to output this | |
5998 | one. */ | |
5999 | if (finfo->info->strip == strip_all) | |
6000 | continue; | |
6001 | ||
6002 | /* We never output section symbols. Instead, we use the section | |
6003 | symbol of the corresponding section in the output file. */ | |
6004 | if (ELF_ST_TYPE (isym->st_info) == STT_SECTION) | |
6005 | continue; | |
6006 | ||
6007 | /* If we are discarding all local symbols, we don't want to | |
6008 | output this one. If we are generating a relocateable output | |
6009 | file, then some of the local symbols may be required by | |
6010 | relocs; we output them below as we discover that they are | |
6011 | needed. */ | |
6012 | if (finfo->info->discard == discard_all) | |
6013 | continue; | |
6014 | ||
6015 | /* Get the name of the symbol. */ | |
6016 | name = elf_string_from_elf_section (input_bfd, symtab_hdr->sh_link, | |
6017 | isym->st_name); | |
6018 | if (name == NULL) | |
6019 | return false; | |
6020 | ||
6021 | /* See if we are discarding symbols with this name. */ | |
6022 | if ((finfo->info->strip == strip_some | |
6023 | && (bfd_hash_lookup (finfo->info->keep_hash, name, false, false) | |
6024 | == NULL)) | |
6025 | || (finfo->info->discard == discard_l | |
6026 | && strncmp (name, finfo->info->lprefix, | |
6027 | finfo->info->lprefix_len) == 0)) | |
6028 | continue; | |
6029 | ||
6030 | /* If we get here, we are going to output this symbol. */ | |
6031 | ||
6032 | /* Adjust the section index for the output file. */ | |
6033 | isym->st_shndx = elf_section_from_bfd_section (output_bfd, | |
6034 | isec->output_section); | |
013dec1a | 6035 | if (isym->st_shndx == (unsigned short) -1) |
6ec3bb6a ILT |
6036 | return false; |
6037 | ||
6038 | *pindex = output_bfd->symcount; | |
6039 | ||
6040 | /* ELF symbols in relocateable files are section relative, but | |
6041 | in executable files they are virtual addresses. Note that | |
6042 | this code assumes that all ELF sections have an associated | |
6043 | BFD section with a reasonable value for output_offset; below | |
6044 | we assume that they also have a reasonable value for | |
6045 | output_section. Any special sections must be set up to meet | |
6046 | these requirements. */ | |
6047 | oldval = isym->st_value; | |
6048 | isym->st_value += isec->output_offset; | |
6049 | if (! finfo->info->relocateable) | |
6050 | isym->st_value += isec->output_section->vma; | |
6051 | ||
6052 | if (! elf_link_output_sym (finfo, name, isym)) | |
6053 | return false; | |
6054 | ||
6055 | /* Restore the old value for reloc handling. */ | |
6056 | isym->st_value = oldval; | |
6057 | } | |
6058 | ||
6059 | /* Relocate the contents of each section. */ | |
6060 | for (o = input_bfd->sections; o != NULL; o = o->next) | |
6061 | { | |
6062 | Elf_Internal_Shdr *input_rel_hdr; | |
6063 | ||
6064 | if ((o->flags & SEC_HAS_CONTENTS) == 0) | |
6065 | continue; | |
6066 | ||
6067 | /* Read the contents of the section. */ | |
6068 | if (! bfd_get_section_contents (input_bfd, o, finfo->contents, | |
6069 | (file_ptr) 0, o->_raw_size)) | |
6070 | return false; | |
6071 | ||
6072 | if ((o->flags & SEC_RELOC) != 0) | |
6073 | { | |
6074 | /* Read in the relocs. */ | |
6075 | input_rel_hdr = &elf_section_data (o)->rel_hdr; | |
6076 | if (bfd_seek (input_bfd, input_rel_hdr->sh_offset, SEEK_SET) != 0 | |
6077 | || bfd_read (finfo->external_relocs, 1, input_rel_hdr->sh_size, | |
6078 | input_bfd) != input_rel_hdr->sh_size) | |
6079 | return false; | |
6080 | ||
6081 | /* Swap in the relocs. For convenience, we always produce | |
6082 | an Elf_Internal_Rela array; if the relocs are Rel, we set | |
6083 | the addend to 0. */ | |
6084 | if (input_rel_hdr->sh_entsize == sizeof (Elf_External_Rel)) | |
6085 | { | |
6086 | Elf_External_Rel *erel; | |
6087 | Elf_External_Rel *erelend; | |
6088 | Elf_Internal_Rela *irela; | |
6089 | ||
6090 | erel = (Elf_External_Rel *) finfo->external_relocs; | |
6091 | erelend = erel + o->reloc_count; | |
6092 | irela = finfo->internal_relocs; | |
6093 | for (; erel < erelend; erel++, irela++) | |
6094 | { | |
6095 | Elf_Internal_Rel irel; | |
6096 | ||
6097 | elf_swap_reloc_in (input_bfd, erel, &irel); | |
6098 | irela->r_offset = irel.r_offset; | |
6099 | irela->r_info = irel.r_info; | |
6100 | irela->r_addend = 0; | |
6101 | } | |
6102 | } | |
6103 | else | |
6104 | { | |
6105 | Elf_External_Rela *erela; | |
6106 | Elf_External_Rela *erelaend; | |
6107 | Elf_Internal_Rela *irela; | |
6108 | ||
6109 | BFD_ASSERT (input_rel_hdr->sh_entsize | |
6110 | == sizeof (Elf_External_Rela)); | |
6111 | ||
6112 | erela = (Elf_External_Rela *) finfo->external_relocs; | |
6113 | erelaend = erela + o->reloc_count; | |
6114 | irela = finfo->internal_relocs; | |
6115 | for (; erela < erelaend; erela++, irela++) | |
6116 | elf_swap_reloca_in (input_bfd, erela, irela); | |
6117 | } | |
6118 | ||
6119 | /* Relocate the section by invoking a back end routine. | |
6120 | ||
6121 | The back end routine is responsible for adjusting the | |
6122 | section contents as necessary, and (if using Rela relocs | |
6123 | and generating a relocateable output file) adjusting the | |
6124 | reloc addend as necessary. | |
6125 | ||
6126 | The back end routine does not have to worry about setting | |
6127 | the reloc address or the reloc symbol index. | |
6128 | ||
6129 | The back end routine is given a pointer to the swapped in | |
6130 | internal symbols, and can access the hash table entries | |
6131 | for the external symbols via elf_sym_hashes (input_bfd). | |
6132 | ||
6133 | When generating relocateable output, the back end routine | |
6134 | must handle STB_LOCAL/STT_SECTION symbols specially. The | |
6135 | output symbol is going to be a section symbol | |
6136 | corresponding to the output section, which will require | |
6137 | the addend to be adjusted. */ | |
6138 | ||
6139 | if (! (*relocate_section) (output_bfd, finfo->info, | |
6140 | input_bfd, o, | |
6141 | finfo->contents, | |
6142 | finfo->internal_relocs, | |
6143 | finfo->internal_syms, | |
6144 | finfo->sections)) | |
6145 | return false; | |
6146 | ||
6147 | if (finfo->info->relocateable) | |
6148 | { | |
6149 | Elf_Internal_Rela *irela; | |
6150 | Elf_Internal_Rela *irelaend; | |
6151 | struct elf_link_hash_entry **rel_hash; | |
6152 | Elf_Internal_Shdr *output_rel_hdr; | |
6153 | ||
6154 | /* Adjust the reloc addresses and symbol indices. */ | |
6155 | ||
6156 | irela = finfo->internal_relocs; | |
6157 | irelaend = irela + o->reloc_count; | |
6158 | rel_hash = (elf_section_data (o->output_section)->rel_hashes | |
6159 | + o->output_section->reloc_count); | |
6160 | for (; irela < irelaend; irela++, rel_hash++) | |
6161 | { | |
6162 | long r_symndx; | |
6163 | Elf_Internal_Sym *isym; | |
6164 | asection *sec; | |
6165 | ||
6166 | irela->r_offset += o->output_offset; | |
6167 | ||
6168 | r_symndx = ELF_R_SYM (irela->r_info); | |
6169 | ||
6170 | if (r_symndx == 0) | |
6171 | continue; | |
6172 | ||
6173 | if (r_symndx >= symtab_hdr->sh_info) | |
6174 | { | |
6175 | long indx; | |
6176 | ||
6177 | /* This is a reloc against a global symbol. We | |
6178 | have not yet output all the local symbols, so | |
6179 | we do not know the symbol index of any global | |
6180 | symbol. We set the rel_hash entry for this | |
6181 | reloc to point to the global hash table entry | |
6182 | for this symbol. The symbol index is then | |
6183 | set at the end of elf_bfd_final_link. */ | |
6184 | indx = r_symndx - symtab_hdr->sh_info; | |
6185 | *rel_hash = elf_sym_hashes (input_bfd)[indx]; | |
6186 | ||
6187 | /* Setting the index to -2 tells | |
6188 | elf_link_output_extsym that this symbol is | |
6189 | used by a reloc. */ | |
6190 | BFD_ASSERT ((*rel_hash)->indx < 0); | |
6191 | (*rel_hash)->indx = -2; | |
6192 | ||
6193 | continue; | |
6194 | } | |
6195 | ||
6196 | /* This is a reloc against a local symbol. */ | |
6197 | ||
6198 | *rel_hash = NULL; | |
6199 | isym = finfo->internal_syms + r_symndx; | |
6200 | sec = finfo->sections[r_symndx]; | |
6201 | if (ELF_ST_TYPE (isym->st_info) == STT_SECTION) | |
6202 | { | |
6203 | /* I suppose the backend ought to fill in the | |
6204 | section of any STT_SECTION symbol against a | |
6205 | processor specific section. */ | |
6206 | if (sec == NULL | |
6207 | || sec == &bfd_und_section | |
6208 | || sec == &bfd_com_section) | |
6209 | { | |
6210 | bfd_set_error (bfd_error_bad_value); | |
6211 | return false; | |
6212 | } | |
6213 | else if (sec == &bfd_abs_section) | |
6214 | r_symndx = 0; | |
6215 | else | |
013dec1a ILT |
6216 | { |
6217 | r_symndx = sec->output_section->target_index; | |
6218 | if (r_symndx == 0) | |
6219 | abort (); | |
6220 | } | |
6ec3bb6a ILT |
6221 | } |
6222 | else | |
6223 | { | |
6224 | if (finfo->indices[r_symndx] == -1) | |
6225 | { | |
6226 | unsigned long link; | |
6227 | const char *name; | |
6228 | asection *osec; | |
6229 | ||
6230 | if (finfo->info->strip == strip_all) | |
6231 | { | |
6232 | /* You can't do ld -r -s. */ | |
6233 | bfd_set_error (bfd_error_invalid_operation); | |
6234 | return false; | |
6235 | } | |
6236 | ||
6237 | /* This symbol was skipped earlier, but | |
6238 | since it is needed by a reloc, we | |
6239 | must output it now. */ | |
6240 | link = symtab_hdr->sh_link; | |
6241 | name = elf_string_from_elf_section (input_bfd, | |
6242 | link, | |
6243 | isym->st_name); | |
6244 | if (name == NULL) | |
6245 | return false; | |
6246 | ||
6247 | osec = sec->output_section; | |
6248 | isym->st_shndx = | |
6249 | elf_section_from_bfd_section (output_bfd, | |
6250 | osec); | |
013dec1a | 6251 | if (isym->st_shndx == (unsigned short) -1) |
6ec3bb6a ILT |
6252 | return false; |
6253 | ||
6254 | isym->st_value += sec->output_offset; | |
6255 | if (! finfo->info->relocateable) | |
6256 | isym->st_value += osec->vma; | |
6257 | ||
6258 | finfo->indices[r_symndx] = output_bfd->symcount; | |
6259 | ||
6260 | if (! elf_link_output_sym (finfo, name, isym)) | |
6261 | return false; | |
6262 | } | |
6263 | ||
6264 | r_symndx = finfo->indices[r_symndx]; | |
6265 | } | |
6266 | ||
6267 | irela->r_info = ELF_R_INFO (r_symndx, | |
6268 | ELF_R_TYPE (irela->r_info)); | |
6269 | } | |
6270 | ||
6271 | /* Swap out the relocs. */ | |
6272 | output_rel_hdr = &elf_section_data (o->output_section)->rel_hdr; | |
6273 | BFD_ASSERT (output_rel_hdr->sh_entsize | |
6274 | == input_rel_hdr->sh_entsize); | |
6275 | irela = finfo->internal_relocs; | |
6276 | irelaend = irela + o->reloc_count; | |
6277 | if (input_rel_hdr->sh_entsize == sizeof (Elf_External_Rel)) | |
6278 | { | |
6279 | Elf_External_Rel *erel; | |
6280 | ||
6281 | erel = ((Elf_External_Rel *) output_rel_hdr->contents | |
6282 | + o->output_section->reloc_count); | |
6283 | for (; irela < irelaend; irela++, erel++) | |
6284 | { | |
6285 | Elf_Internal_Rel irel; | |
6286 | ||
6287 | irel.r_offset = irela->r_offset; | |
6288 | irel.r_info = irela->r_info; | |
6289 | BFD_ASSERT (irela->r_addend == 0); | |
6290 | elf_swap_reloc_out (output_bfd, &irel, erel); | |
6291 | } | |
6292 | } | |
6293 | else | |
6294 | { | |
6295 | Elf_External_Rela *erela; | |
6296 | ||
6297 | BFD_ASSERT (input_rel_hdr->sh_entsize | |
6298 | == sizeof (Elf_External_Rela)); | |
6299 | erela = ((Elf_External_Rela *) output_rel_hdr->contents | |
6300 | + o->output_section->reloc_count); | |
6301 | for (; irela < irelaend; irela++, erela++) | |
6302 | elf_swap_reloca_out (output_bfd, irela, erela); | |
6303 | } | |
6304 | ||
6305 | o->output_section->reloc_count += o->reloc_count; | |
6306 | } | |
6307 | } | |
6308 | ||
6309 | /* Write out the modified section contents. */ | |
6310 | if (! bfd_set_section_contents (output_bfd, o->output_section, | |
6311 | finfo->contents, o->output_offset, | |
6312 | (o->_cooked_size != 0 | |
6313 | ? o->_cooked_size | |
6314 | : o->_raw_size))) | |
6315 | return false; | |
6316 | } | |
6317 | ||
6318 | return true; | |
6319 | } | |
6320 | ||
6321 | /* Generate a reloc when linking an ELF file. This is a reloc | |
6322 | requested by the linker, and does come from any input file. This | |
6323 | is used to build constructor and destructor tables when linking | |
6324 | with -Ur. */ | |
6325 | ||
6326 | static boolean | |
6327 | elf_reloc_link_order (output_bfd, info, output_section, link_order) | |
6328 | bfd *output_bfd; | |
6329 | struct bfd_link_info *info; | |
6330 | asection *output_section; | |
6331 | struct bfd_link_order *link_order; | |
6332 | { | |
6333 | const reloc_howto_type *howto; | |
6334 | long indx; | |
6335 | bfd_vma offset; | |
6336 | struct elf_link_hash_entry **rel_hash_ptr; | |
6337 | Elf_Internal_Shdr *rel_hdr; | |
6338 | ||
6339 | howto = bfd_reloc_type_lookup (output_bfd, link_order->u.reloc.p->reloc); | |
6340 | if (howto == NULL) | |
6341 | { | |
6342 | bfd_set_error (bfd_error_bad_value); | |
6343 | return false; | |
6344 | } | |
6345 | ||
6346 | /* If this is an inplace reloc, we must write the addend into the | |
6347 | object file. */ | |
6348 | if (howto->partial_inplace | |
6349 | && link_order->u.reloc.p->addend != 0) | |
6350 | { | |
6351 | bfd_size_type size; | |
6352 | bfd_reloc_status_type rstat; | |
6353 | bfd_byte *buf; | |
6354 | boolean ok; | |
6355 | ||
6356 | size = bfd_get_reloc_size (howto); | |
6357 | buf = (bfd_byte *) bfd_zmalloc (size); | |
6358 | if (buf == (bfd_byte *) NULL) | |
6359 | { | |
6360 | bfd_set_error (bfd_error_no_memory); | |
6361 | return false; | |
6362 | } | |
6363 | rstat = _bfd_relocate_contents (howto, output_bfd, | |
6364 | link_order->u.reloc.p->addend, buf); | |
6365 | switch (rstat) | |
6366 | { | |
6367 | case bfd_reloc_ok: | |
6368 | break; | |
6369 | default: | |
6370 | case bfd_reloc_outofrange: | |
6371 | abort (); | |
6372 | case bfd_reloc_overflow: | |
6373 | if (! ((*info->callbacks->reloc_overflow) | |
6374 | (info, | |
6375 | (link_order->type == bfd_section_reloc_link_order | |
6376 | ? bfd_section_name (output_bfd, | |
6377 | link_order->u.reloc.p->u.section) | |
6378 | : link_order->u.reloc.p->u.name), | |
6379 | howto->name, link_order->u.reloc.p->addend, | |
6380 | (bfd *) NULL, (asection *) NULL, (bfd_vma) 0))) | |
6381 | { | |
6382 | free (buf); | |
6383 | return false; | |
6384 | } | |
6385 | break; | |
6386 | } | |
6387 | ok = bfd_set_section_contents (output_bfd, output_section, (PTR) buf, | |
6388 | (file_ptr) link_order->offset, size); | |
6389 | free (buf); | |
6390 | if (! ok) | |
6391 | return false; | |
6392 | } | |
6393 | ||
6394 | /* Figure out the symbol index. */ | |
6395 | rel_hash_ptr = (elf_section_data (output_section)->rel_hashes | |
6396 | + output_section->reloc_count); | |
6397 | if (link_order->type == bfd_section_reloc_link_order) | |
6398 | { | |
013dec1a ILT |
6399 | indx = link_order->u.reloc.p->u.section->target_index; |
6400 | if (indx == 0) | |
6401 | abort (); | |
6ec3bb6a ILT |
6402 | *rel_hash_ptr = NULL; |
6403 | } | |
6404 | else | |
6405 | { | |
6406 | struct elf_link_hash_entry *h; | |
6407 | ||
6408 | h = elf_link_hash_lookup (elf_hash_table (info), | |
6409 | link_order->u.reloc.p->u.name, | |
6410 | false, false, true); | |
6411 | if (h != NULL) | |
6412 | { | |
6413 | /* Setting the index to -2 tells elf_link_output_extsym that | |
6414 | this symbol is used by a reloc. */ | |
6415 | h->indx = -2; | |
6416 | *rel_hash_ptr = h; | |
6417 | indx = 0; | |
6418 | } | |
6419 | else | |
6420 | { | |
6421 | if (! ((*info->callbacks->unattached_reloc) | |
6422 | (info, link_order->u.reloc.p->u.name, (bfd *) NULL, | |
6423 | (asection *) NULL, (bfd_vma) 0))) | |
6424 | return false; | |
6425 | indx = 0; | |
6426 | } | |
6427 | } | |
6428 | ||
6429 | /* The address of a reloc is relative to the section in a | |
6430 | relocateable file, and is a virtual address in an executable | |
6431 | file. */ | |
6432 | offset = link_order->offset; | |
6433 | if (! info->relocateable) | |
6434 | offset += output_section->vma; | |
6435 | ||
6436 | rel_hdr = &elf_section_data (output_section)->rel_hdr; | |
6437 | ||
6438 | if (rel_hdr->sh_type == SHT_REL) | |
6439 | { | |
6440 | Elf_Internal_Rel irel; | |
6441 | Elf_External_Rel *erel; | |
6442 | ||
6443 | irel.r_offset = offset; | |
6444 | irel.r_info = ELF_R_INFO (indx, howto->type); | |
6445 | erel = ((Elf_External_Rel *) rel_hdr->contents | |
6446 | + output_section->reloc_count); | |
6447 | elf_swap_reloc_out (output_bfd, &irel, erel); | |
6448 | } | |
6449 | else | |
6450 | { | |
6451 | Elf_Internal_Rela irela; | |
6452 | Elf_External_Rela *erela; | |
6453 | ||
6454 | irela.r_offset = offset; | |
6455 | irela.r_info = ELF_R_INFO (indx, howto->type); | |
6456 | irela.r_addend = link_order->u.reloc.p->addend; | |
6457 | erela = ((Elf_External_Rela *) rel_hdr->contents | |
6458 | + output_section->reloc_count); | |
6459 | elf_swap_reloca_out (output_bfd, &irela, erela); | |
6460 | } | |
6461 | ||
6462 | ++output_section->reloc_count; | |
6463 | ||
6464 | return true; | |
6465 | } |