Commit | Line | Data |
---|---|---|
1b6bc7e0 CF |
1 | /* Read the export table symbols from a portable executable and |
2 | convert to internal format, for GDB. Used as a last resort if no | |
3 | debugging symbols recognized. | |
4 | ||
0b302171 | 5 | Copyright (C) 2003, 2007-2012 Free Software Foundation, Inc. |
1b6bc7e0 CF |
6 | |
7 | This file is part of GDB. | |
8 | ||
9 | This program is free software; you can redistribute it and/or modify | |
10 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 11 | the Free Software Foundation; either version 3 of the License, or |
1b6bc7e0 CF |
12 | (at your option) any later version. |
13 | ||
14 | This program is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
a9762ec7 | 20 | along with this program. If not, see <http://www.gnu.org/licenses/>. |
1b6bc7e0 | 21 | |
aff410f1 | 22 | Contributed by Raoul M. Gough (RaoulGough@yahoo.co.uk). */ |
1b6bc7e0 | 23 | |
0baeab03 PA |
24 | #include "defs.h" |
25 | ||
1b6bc7e0 CF |
26 | #include "coff-pe-read.h" |
27 | ||
81de56be | 28 | #include "bfd.h" |
1b6bc7e0 CF |
29 | #include "gdbtypes.h" |
30 | ||
3999122f PM |
31 | #include "command.h" |
32 | #include "gdbcmd.h" | |
1b6bc7e0 CF |
33 | #include "symtab.h" |
34 | #include "symfile.h" | |
35 | #include "objfiles.h" | |
3999122f PM |
36 | #include "common/common-utils.h" |
37 | ||
38 | #include <ctype.h> | |
1b6bc7e0 CF |
39 | |
40 | /* Internal section information */ | |
41 | ||
3999122f PM |
42 | /* Coff PE read debugging flag: |
43 | default value is 0, | |
44 | value 1 outputs problems encountered while parsing PE file, | |
45 | value above 1 also lists all generated minimal symbols. */ | |
46 | static unsigned int debug_coff_pe_read; | |
47 | ||
1b6bc7e0 CF |
48 | struct read_pe_section_data |
49 | { | |
aff410f1 MS |
50 | CORE_ADDR vma_offset; /* Offset to loaded address of section. */ |
51 | unsigned long rva_start; /* Start offset within the pe. */ | |
52 | unsigned long rva_end; /* End offset within the pe. */ | |
53 | enum minimal_symbol_type ms_type; /* Type to assign symbols in | |
54 | section. */ | |
3999122f | 55 | char *section_name; /* Recorded section name. */ |
1b6bc7e0 CF |
56 | }; |
57 | ||
78ea0eca PM |
58 | #define IMAGE_SCN_CNT_CODE 0x20 |
59 | #define IMAGE_SCN_CNT_INITIALIZED_DATA 0x40 | |
60 | #define IMAGE_SCN_CNT_UNINITIALIZED_DATA 0x80 | |
1b6bc7e0 CF |
61 | #define PE_SECTION_INDEX_TEXT 0 |
62 | #define PE_SECTION_INDEX_DATA 1 | |
63 | #define PE_SECTION_INDEX_BSS 2 | |
64 | #define PE_SECTION_TABLE_SIZE 3 | |
65 | #define PE_SECTION_INDEX_INVALID -1 | |
66 | \f | |
67 | /* Get the index of the named section in our own array, which contains | |
aff410f1 MS |
68 | text, data and bss in that order. Return PE_SECTION_INDEX_INVALID |
69 | if passed an unrecognised section name. */ | |
1b6bc7e0 CF |
70 | |
71 | static int | |
72 | read_pe_section_index (const char *section_name) | |
73 | { | |
74 | if (strcmp (section_name, ".text") == 0) | |
75 | { | |
76 | return PE_SECTION_INDEX_TEXT; | |
77 | } | |
78 | ||
79 | else if (strcmp (section_name, ".data") == 0) | |
80 | { | |
81 | return PE_SECTION_INDEX_DATA; | |
82 | } | |
83 | ||
84 | else if (strcmp (section_name, ".bss") == 0) | |
85 | { | |
86 | return PE_SECTION_INDEX_BSS; | |
87 | } | |
88 | ||
89 | else | |
90 | { | |
91 | return PE_SECTION_INDEX_INVALID; | |
92 | } | |
93 | } | |
94 | ||
3999122f PM |
95 | /* Get the index of the named section in our own full arrayi. |
96 | text, data and bss in that order. Return PE_SECTION_INDEX_INVALID | |
97 | if passed an unrecognised section name. */ | |
98 | ||
99 | static int | |
100 | get_pe_section_index (const char *section_name, | |
101 | struct read_pe_section_data *sections, | |
102 | int nb_sections) | |
103 | { | |
104 | int i; | |
105 | ||
106 | for (i = 0; i < nb_sections; i++) | |
107 | if (strcmp (sections[i].section_name, section_name) == 0) | |
108 | return i; | |
109 | return PE_SECTION_INDEX_INVALID; | |
110 | } | |
111 | ||
112 | /* Structure used by get_section_vmas function below | |
113 | to access section_data array and the size of the array | |
114 | stored in nb_sections field. */ | |
115 | struct pe_sections_info | |
116 | { | |
117 | int nb_sections; | |
118 | struct read_pe_section_data *sections; | |
119 | }; | |
120 | ||
aff410f1 | 121 | /* Record the virtual memory address of a section. */ |
1b6bc7e0 CF |
122 | |
123 | static void | |
124 | get_section_vmas (bfd *abfd, asection *sectp, void *context) | |
125 | { | |
3999122f PM |
126 | struct pe_sections_info *data = context; |
127 | struct read_pe_section_data *sections = data->sections; | |
128 | int sectix = get_pe_section_index (sectp->name, sections, | |
129 | data->nb_sections); | |
1b6bc7e0 CF |
130 | |
131 | if (sectix != PE_SECTION_INDEX_INVALID) | |
132 | { | |
133 | /* Data within the section start at rva_start in the pe and at | |
aff410f1 | 134 | bfd_get_section_vma() within memory. Store the offset. */ |
1b6bc7e0 CF |
135 | |
136 | sections[sectix].vma_offset | |
137 | = bfd_get_section_vma (abfd, sectp) - sections[sectix].rva_start; | |
138 | } | |
139 | } | |
140 | \f | |
3999122f PM |
141 | /* Create a minimal symbol entry for an exported symbol. |
142 | SYM_NAME contains the exported name or NULL if exported by ordinal, | |
143 | FUNC_RVA contains the Relative Virtual Address of the symbol, | |
144 | ORDINAL is the ordinal index value of the symbol, | |
145 | SECTION_DATA contains information about the section in which the | |
146 | symbol is declared, | |
147 | DLL_NAME is the internal name of the DLL file, | |
148 | OBJFILE is the objfile struct of DLL_NAME. */ | |
1b6bc7e0 CF |
149 | |
150 | static void | |
3999122f | 151 | add_pe_exported_sym (const char *sym_name, |
1b6bc7e0 | 152 | unsigned long func_rva, |
3999122f | 153 | int ordinal, |
1b6bc7e0 CF |
154 | const struct read_pe_section_data *section_data, |
155 | const char *dll_name, struct objfile *objfile) | |
156 | { | |
3999122f | 157 | char *qualified_name, *bare_name; |
aff410f1 | 158 | /* Add the stored offset to get the loaded address of the symbol. */ |
1b6bc7e0 | 159 | CORE_ADDR vma = func_rva + section_data->vma_offset; |
1b6bc7e0 | 160 | int dll_name_len = strlen (dll_name); |
1b6bc7e0 CF |
161 | |
162 | /* Generate a (hopefully unique) qualified name using the first part | |
aff410f1 MS |
163 | of the dll name, e.g. KERNEL32!AddAtomA. This matches the style |
164 | used by windbg from the "Microsoft Debugging Tools for Windows". */ | |
1b6bc7e0 | 165 | |
3999122f PM |
166 | if (sym_name == NULL || *sym_name == '\0') |
167 | bare_name = xstrprintf ("#%d", ordinal); | |
168 | else | |
169 | bare_name = xstrdup (sym_name); | |
170 | ||
171 | qualified_name = xstrprintf ("%s!%s", dll_name, bare_name); | |
1b6bc7e0 | 172 | |
3999122f PM |
173 | if ((section_data->ms_type == mst_unknown) && debug_coff_pe_read) |
174 | fprintf_unfiltered (gdb_stdlog , _("Unknown section type for \"%s\"" | |
175 | " for entry \"%s\" in dll \"%s\"\n"), | |
176 | section_data->section_name, sym_name, dll_name); | |
1b6bc7e0 | 177 | |
3999122f PM |
178 | prim_record_minimal_symbol (qualified_name, vma, |
179 | section_data->ms_type, objfile); | |
1b6bc7e0 | 180 | |
3999122f PM |
181 | /* Enter the plain name as well, which might not be unique. */ |
182 | prim_record_minimal_symbol (bare_name, vma, section_data->ms_type, objfile); | |
183 | if (debug_coff_pe_read > 1) | |
184 | fprintf_unfiltered (gdb_stdlog, _("Adding exported symbol \"%s\"" | |
185 | " in dll \"%s\"\n"), sym_name, dll_name); | |
1b6bc7e0 | 186 | xfree (qualified_name); |
3999122f PM |
187 | xfree (bare_name); |
188 | } | |
189 | ||
190 | /* Create a minimal symbol entry for an exported forward symbol. | |
191 | Return 1 if the forwarded function was found 0 otherwise. | |
192 | SYM_NAME contains the exported name or NULL if exported by ordinal, | |
193 | FORWARD_DLL_NAME is the name of the DLL in which the target symobl resides, | |
194 | FORWARD_FUNC_NAME is the name of the target symbol in that DLL, | |
195 | ORDINAL is the ordinal index value of the symbol, | |
196 | DLL_NAME is the internal name of the DLL file, | |
197 | OBJFILE is the objfile struct of DLL_NAME. */ | |
198 | ||
199 | static int | |
200 | add_pe_forwarded_sym (const char *sym_name, const char *forward_dll_name, | |
201 | const char *forward_func_name, int ordinal, | |
202 | const char *dll_name, struct objfile *objfile) | |
203 | { | |
204 | CORE_ADDR vma; | |
205 | struct objfile *forward_objfile; | |
206 | struct minimal_symbol *msymbol; | |
207 | short section; | |
208 | enum minimal_symbol_type msymtype; | |
209 | int dll_name_len = strlen (dll_name); | |
210 | char *qualified_name, *bare_name; | |
211 | int forward_dll_name_len = strlen (forward_dll_name); | |
212 | int forward_func_name_len = strlen (forward_func_name); | |
213 | int forward_len = forward_dll_name_len + forward_func_name_len + 2; | |
214 | char *forward_qualified_name = alloca (forward_len); | |
215 | ||
216 | xsnprintf (forward_qualified_name, forward_len, "%s!%s", forward_dll_name, | |
217 | forward_func_name); | |
218 | ||
219 | ||
220 | msymbol = lookup_minimal_symbol_and_objfile (forward_qualified_name, | |
221 | &forward_objfile); | |
222 | ||
223 | if (!msymbol) | |
224 | { | |
225 | int i; | |
226 | ||
227 | for (i = 0; i < forward_dll_name_len; i++) | |
228 | forward_qualified_name[i] = tolower (forward_qualified_name[i]); | |
229 | msymbol = lookup_minimal_symbol_and_objfile (forward_qualified_name, | |
230 | &forward_objfile); | |
231 | } | |
232 | ||
233 | if (!msymbol) | |
234 | { | |
235 | if (debug_coff_pe_read) | |
236 | fprintf_unfiltered (gdb_stdlog, _("Unable to find function \"%s\" in" | |
237 | " dll \"%s\", forward of \"%s\" in dll \"%s\"\n"), | |
238 | forward_func_name, forward_dll_name, sym_name, | |
239 | dll_name); | |
240 | return 0; | |
241 | } | |
242 | ||
243 | if (debug_coff_pe_read > 1) | |
244 | fprintf_unfiltered (gdb_stdlog, _("Adding forwarded exported symbol" | |
245 | " \"%s\" in dll \"%s\", pointing to \"%s\"\n"), | |
246 | sym_name, dll_name, forward_qualified_name); | |
247 | ||
248 | vma = SYMBOL_VALUE_ADDRESS (msymbol); | |
249 | section = SYMBOL_SECTION (msymbol); | |
250 | msymtype = MSYMBOL_TYPE (msymbol); | |
251 | ||
252 | /* Generate a (hopefully unique) qualified name using the first part | |
253 | of the dll name, e.g. KERNEL32!AddAtomA. This matches the style | |
254 | used by windbg from the "Microsoft Debugging Tools for Windows". */ | |
255 | ||
256 | if (sym_name == NULL || *sym_name == '\0') | |
257 | bare_name = xstrprintf ("#%d", ordinal); | |
258 | else | |
259 | bare_name = xstrdup (sym_name); | |
260 | ||
261 | qualified_name = xstrprintf ("%s!%s", dll_name, bare_name); | |
262 | ||
263 | prim_record_minimal_symbol (qualified_name, vma, msymtype, objfile); | |
1b6bc7e0 | 264 | |
aff410f1 | 265 | /* Enter the plain name as well, which might not be unique. */ |
3999122f PM |
266 | prim_record_minimal_symbol (bare_name, vma, msymtype, objfile); |
267 | xfree (qualified_name); | |
268 | xfree (bare_name); | |
269 | ||
270 | return 1; | |
1b6bc7e0 CF |
271 | } |
272 | ||
3999122f | 273 | /* Truncate a dll_name at the last dot character. */ |
1b6bc7e0 CF |
274 | |
275 | static void | |
276 | read_pe_truncate_name (char *dll_name) | |
277 | { | |
3999122f | 278 | char *last_point = strrchr (dll_name, '.'); |
1b6bc7e0 | 279 | |
3999122f PM |
280 | if (last_point != NULL) |
281 | *last_point = '\0'; | |
1b6bc7e0 CF |
282 | } |
283 | \f | |
aff410f1 | 284 | /* Low-level support functions, direct from the ld module pe-dll.c. */ |
1b6bc7e0 CF |
285 | static unsigned int |
286 | pe_get16 (bfd *abfd, int where) | |
287 | { | |
288 | unsigned char b[2]; | |
289 | ||
290 | bfd_seek (abfd, (file_ptr) where, SEEK_SET); | |
291 | bfd_bread (b, (bfd_size_type) 2, abfd); | |
292 | return b[0] + (b[1] << 8); | |
293 | } | |
294 | ||
295 | static unsigned int | |
296 | pe_get32 (bfd *abfd, int where) | |
297 | { | |
298 | unsigned char b[4]; | |
299 | ||
300 | bfd_seek (abfd, (file_ptr) where, SEEK_SET); | |
301 | bfd_bread (b, (bfd_size_type) 4, abfd); | |
302 | return b[0] + (b[1] << 8) + (b[2] << 16) + (b[3] << 24); | |
303 | } | |
304 | ||
3999122f PM |
305 | static unsigned int |
306 | pe_as16 (void *ptr) | |
307 | { | |
308 | unsigned char *b = ptr; | |
309 | ||
310 | return b[0] + (b[1] << 8); | |
311 | } | |
312 | ||
1b6bc7e0 CF |
313 | static unsigned int |
314 | pe_as32 (void *ptr) | |
315 | { | |
316 | unsigned char *b = ptr; | |
317 | ||
318 | return b[0] + (b[1] << 8) + (b[2] << 16) + (b[3] << 24); | |
319 | } | |
320 | \f | |
321 | /* Read the (non-debug) export symbol table from a portable | |
aff410f1 MS |
322 | executable. Code originally lifted from the ld function |
323 | pe_implied_import_dll in pe-dll.c. */ | |
1b6bc7e0 CF |
324 | |
325 | void | |
326 | read_pe_exported_syms (struct objfile *objfile) | |
327 | { | |
328 | bfd *dll = objfile->obfd; | |
3999122f | 329 | unsigned long nbnormal, nbforward; |
1b6bc7e0 | 330 | unsigned long pe_header_offset, opthdr_ofs, num_entries, i; |
3999122f | 331 | unsigned long export_opthdrrva, export_opthdrsize; |
1b6bc7e0 CF |
332 | unsigned long export_rva, export_size, nsections, secptr, expptr; |
333 | unsigned long exp_funcbase; | |
334 | unsigned char *expdata, *erva; | |
335 | unsigned long name_rvas, ordinals, nexp, ordbase; | |
3999122f PM |
336 | char *dll_name = (char *) dll->filename; |
337 | int otherix = PE_SECTION_TABLE_SIZE; | |
338 | int exportix = -1; | |
a68ddad5 KT |
339 | int is_pe64 = 0; |
340 | int is_pe32 = 0; | |
1b6bc7e0 CF |
341 | |
342 | /* Array elements are for text, data and bss in that order | |
3999122f | 343 | Initialization with RVA_START > RVA_END guarantees that |
aff410f1 | 344 | unused sections won't be matched. */ |
3999122f PM |
345 | struct read_pe_section_data *section_data; |
346 | struct pe_sections_info pe_sections_info; | |
1b6bc7e0 | 347 | |
3999122f | 348 | struct cleanup *back_to = make_cleanup (null_cleanup, 0); |
1b6bc7e0 CF |
349 | |
350 | char const *target = bfd_get_target (objfile->obfd); | |
351 | ||
3999122f PM |
352 | section_data = xzalloc (PE_SECTION_TABLE_SIZE |
353 | * sizeof (struct read_pe_section_data)); | |
354 | ||
355 | make_cleanup (free_current_contents, §ion_data); | |
356 | ||
357 | for (i=0; i < PE_SECTION_TABLE_SIZE; i++) | |
358 | { | |
359 | section_data[i].vma_offset = 0; | |
360 | section_data[i].rva_start = 1; | |
361 | section_data[i].rva_end = 0; | |
362 | }; | |
363 | section_data[PE_SECTION_INDEX_TEXT].ms_type = mst_text; | |
364 | section_data[PE_SECTION_INDEX_TEXT].section_name = ".text"; | |
365 | section_data[PE_SECTION_INDEX_DATA].ms_type = mst_data; | |
366 | section_data[PE_SECTION_INDEX_DATA].section_name = ".data"; | |
367 | section_data[PE_SECTION_INDEX_BSS].ms_type = mst_bss; | |
368 | section_data[PE_SECTION_INDEX_BSS].section_name = ".bss"; | |
369 | ||
5e13bd89 PA |
370 | is_pe64 = (strcmp (target, "pe-x86-64") == 0 |
371 | || strcmp (target, "pei-x86-64") == 0); | |
372 | is_pe32 = (strcmp (target, "pe-i386") == 0 | |
373 | || strcmp (target, "pei-i386") == 0 | |
374 | || strcmp (target, "pe-arm-wince-little") == 0 | |
375 | || strcmp (target, "pei-arm-wince-little") == 0); | |
a68ddad5 | 376 | if (!is_pe32 && !is_pe64) |
1b6bc7e0 | 377 | { |
5e13bd89 PA |
378 | /* This is not a recognized PE format file. Abort now, because |
379 | the code is untested on anything else. *FIXME* test on | |
aff410f1 | 380 | further architectures and loosen or remove this test. */ |
1b6bc7e0 CF |
381 | return; |
382 | } | |
383 | ||
384 | /* Get pe_header, optional header and numbers of export entries. */ | |
385 | pe_header_offset = pe_get32 (dll, 0x3c); | |
386 | opthdr_ofs = pe_header_offset + 4 + 20; | |
a68ddad5 | 387 | if (is_pe64) |
1dac1b47 | 388 | num_entries = pe_get32 (dll, opthdr_ofs + 108); |
a68ddad5 KT |
389 | else |
390 | num_entries = pe_get32 (dll, opthdr_ofs + 92); | |
1b6bc7e0 CF |
391 | |
392 | if (num_entries < 1) /* No exports. */ | |
393 | { | |
394 | return; | |
395 | } | |
a68ddad5 KT |
396 | if (is_pe64) |
397 | { | |
3999122f PM |
398 | export_opthdrrva = pe_get32 (dll, opthdr_ofs + 112); |
399 | export_opthdrsize = pe_get32 (dll, opthdr_ofs + 116); | |
a68ddad5 KT |
400 | } |
401 | else | |
402 | { | |
3999122f PM |
403 | export_opthdrrva = pe_get32 (dll, opthdr_ofs + 96); |
404 | export_opthdrsize = pe_get32 (dll, opthdr_ofs + 100); | |
a68ddad5 | 405 | } |
1b6bc7e0 CF |
406 | nsections = pe_get16 (dll, pe_header_offset + 4 + 2); |
407 | secptr = (pe_header_offset + 4 + 20 + | |
408 | pe_get16 (dll, pe_header_offset + 4 + 16)); | |
409 | expptr = 0; | |
3999122f | 410 | export_size = 0; |
1b6bc7e0 CF |
411 | |
412 | /* Get the rva and size of the export section. */ | |
413 | for (i = 0; i < nsections; i++) | |
414 | { | |
415 | char sname[8]; | |
416 | unsigned long secptr1 = secptr + 40 * i; | |
417 | unsigned long vaddr = pe_get32 (dll, secptr1 + 12); | |
418 | unsigned long vsize = pe_get32 (dll, secptr1 + 16); | |
419 | unsigned long fptr = pe_get32 (dll, secptr1 + 20); | |
420 | ||
421 | bfd_seek (dll, (file_ptr) secptr1, SEEK_SET); | |
3999122f | 422 | bfd_bread (sname, (bfd_size_type) sizeof (sname), dll); |
1b6bc7e0 | 423 | |
3999122f PM |
424 | if ((strcmp (sname, ".edata") == 0) |
425 | || (vaddr <= export_opthdrrva && export_opthdrrva < vaddr + vsize)) | |
1b6bc7e0 | 426 | { |
3999122f PM |
427 | if (strcmp (sname, ".edata") != 0) |
428 | { | |
429 | if (debug_coff_pe_read) | |
430 | fprintf_unfiltered (gdb_stdlog, _("Export RVA for dll " | |
431 | "\"%s\" is in section \"%s\"\n"), | |
432 | dll_name, sname); | |
433 | } | |
434 | else if (export_opthdrrva != vaddr && debug_coff_pe_read) | |
435 | fprintf_unfiltered (gdb_stdlog, _("Wrong value of export RVA" | |
436 | " for dll \"%s\": 0x%lx instead of 0x%lx\n"), | |
437 | dll_name, export_opthdrrva, vaddr); | |
438 | expptr = fptr + (export_opthdrrva - vaddr); | |
439 | exportix = i; | |
1b6bc7e0 CF |
440 | break; |
441 | } | |
442 | } | |
443 | ||
3999122f PM |
444 | export_rva = export_opthdrrva; |
445 | export_size = export_opthdrsize; | |
446 | ||
1b6bc7e0 CF |
447 | if (export_size == 0) |
448 | { | |
aff410f1 | 449 | /* Empty export table. */ |
1b6bc7e0 CF |
450 | return; |
451 | } | |
452 | ||
aff410f1 MS |
453 | /* Scan sections and store the base and size of the relevant |
454 | sections. */ | |
1b6bc7e0 CF |
455 | for (i = 0; i < nsections; i++) |
456 | { | |
457 | unsigned long secptr1 = secptr + 40 * i; | |
458 | unsigned long vsize = pe_get32 (dll, secptr1 + 8); | |
459 | unsigned long vaddr = pe_get32 (dll, secptr1 + 12); | |
3999122f | 460 | unsigned long characteristics = pe_get32 (dll, secptr1 + 36); |
1b6bc7e0 CF |
461 | char sec_name[9]; |
462 | int sectix; | |
463 | ||
3999122f | 464 | memset (sec_name, 0, sizeof (sec_name)); |
1b6bc7e0 CF |
465 | bfd_seek (dll, (file_ptr) secptr1 + 0, SEEK_SET); |
466 | bfd_bread (sec_name, (bfd_size_type) 8, dll); | |
467 | ||
468 | sectix = read_pe_section_index (sec_name); | |
469 | ||
470 | if (sectix != PE_SECTION_INDEX_INVALID) | |
471 | { | |
472 | section_data[sectix].rva_start = vaddr; | |
473 | section_data[sectix].rva_end = vaddr + vsize; | |
474 | } | |
3999122f PM |
475 | else |
476 | { | |
477 | char *name; | |
478 | ||
479 | section_data = xrealloc (section_data, (otherix + 1) | |
480 | * sizeof (struct read_pe_section_data)); | |
481 | name = xstrdup (sec_name); | |
482 | section_data[otherix].section_name = name; | |
483 | make_cleanup (xfree, name); | |
484 | section_data[otherix].rva_start = vaddr; | |
485 | section_data[otherix].rva_end = vaddr + vsize; | |
486 | section_data[otherix].vma_offset = 0; | |
487 | if (characteristics & IMAGE_SCN_CNT_CODE) | |
488 | section_data[otherix].ms_type = mst_text; | |
489 | else if (characteristics & IMAGE_SCN_CNT_INITIALIZED_DATA) | |
490 | section_data[otherix].ms_type = mst_data; | |
491 | else if (characteristics & IMAGE_SCN_CNT_UNINITIALIZED_DATA) | |
492 | section_data[otherix].ms_type = mst_bss; | |
493 | else | |
494 | section_data[otherix].ms_type = mst_unknown; | |
495 | otherix++; | |
496 | } | |
1b6bc7e0 CF |
497 | } |
498 | ||
499 | expdata = (unsigned char *) xmalloc (export_size); | |
3999122f | 500 | make_cleanup (xfree, expdata); |
1b6bc7e0 CF |
501 | |
502 | bfd_seek (dll, (file_ptr) expptr, SEEK_SET); | |
503 | bfd_bread (expdata, (bfd_size_type) export_size, dll); | |
504 | erva = expdata - export_rva; | |
505 | ||
506 | nexp = pe_as32 (expdata + 24); | |
507 | name_rvas = pe_as32 (expdata + 32); | |
508 | ordinals = pe_as32 (expdata + 36); | |
509 | ordbase = pe_as32 (expdata + 16); | |
510 | exp_funcbase = pe_as32 (expdata + 28); | |
511 | ||
aff410f1 | 512 | /* Use internal dll name instead of full pathname. */ |
1b6bc7e0 CF |
513 | dll_name = pe_as32 (expdata + 12) + erva; |
514 | ||
3999122f PM |
515 | pe_sections_info.nb_sections = otherix; |
516 | pe_sections_info.sections = section_data; | |
517 | ||
518 | bfd_map_over_sections (dll, get_section_vmas, &pe_sections_info); | |
1b6bc7e0 CF |
519 | |
520 | /* Adjust the vma_offsets in case this PE got relocated. This | |
521 | assumes that *all* sections share the same relocation offset | |
aff410f1 | 522 | as the text section. */ |
3999122f | 523 | for (i = 0; i < otherix; i++) |
1b6bc7e0 CF |
524 | { |
525 | section_data[i].vma_offset | |
526 | += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
527 | } | |
528 | ||
1b6bc7e0 | 529 | /* Truncate name at first dot. Should maybe also convert to all |
aff410f1 | 530 | lower case for convenience on Windows. */ |
1b6bc7e0 CF |
531 | read_pe_truncate_name (dll_name); |
532 | ||
3999122f PM |
533 | if (debug_coff_pe_read) |
534 | fprintf_unfiltered (gdb_stdlog, _("DLL \"%s\" has %ld export entries," | |
535 | " base=%ld\n"), dll_name, nexp, ordbase); | |
536 | nbforward = 0; | |
537 | nbnormal = 0; | |
1b6bc7e0 CF |
538 | /* Iterate through the list of symbols. */ |
539 | for (i = 0; i < nexp; i++) | |
540 | { | |
541 | /* Pointer to the names vector. */ | |
542 | unsigned long name_rva = pe_as32 (erva + name_rvas + i * 4); | |
3999122f PM |
543 | /* Retrieve ordinal value. */ |
544 | ||
545 | unsigned long ordinal = pe_as16 (erva + ordinals + i * 2); | |
546 | ||
1b6bc7e0 CF |
547 | |
548 | /* Pointer to the function address vector. */ | |
3999122f PM |
549 | /* This is relatived to ordinal value. */ |
550 | unsigned long func_rva = pe_as32 (erva + exp_funcbase + | |
551 | ordinal * 4); | |
1b6bc7e0 | 552 | |
aff410f1 | 553 | /* Find this symbol's section in our own array. */ |
1b6bc7e0 | 554 | int sectix = 0; |
3999122f PM |
555 | int section_found = 0; |
556 | ||
557 | /* First handle forward cases. */ | |
558 | if (func_rva >= export_rva && func_rva < export_rva + export_size) | |
559 | { | |
560 | char *forward_name = (char *) (erva + func_rva); | |
561 | char *funcname = (char *) (erva + name_rva); | |
562 | char *forward_dll_name = forward_name; | |
563 | char *forward_func_name = forward_name; | |
564 | char *sep = strrchr (forward_name, '.'); | |
565 | ||
566 | if (sep) | |
567 | { | |
568 | int len = (int) (sep - forward_name); | |
1b6bc7e0 | 569 | |
3999122f PM |
570 | forward_dll_name = alloca (len + 1); |
571 | strncpy (forward_dll_name, forward_name, len); | |
572 | forward_dll_name[len] = '\0'; | |
573 | forward_func_name = ++sep; | |
574 | } | |
575 | if (add_pe_forwarded_sym (funcname, forward_dll_name, | |
576 | forward_func_name, ordinal, | |
577 | dll_name, objfile) != 0) | |
578 | ++nbforward; | |
579 | continue; | |
580 | } | |
581 | ||
582 | for (sectix = 0; sectix < otherix; ++sectix) | |
1b6bc7e0 CF |
583 | { |
584 | if ((func_rva >= section_data[sectix].rva_start) | |
585 | && (func_rva < section_data[sectix].rva_end)) | |
586 | { | |
3999122f | 587 | section_found = 1; |
1b6bc7e0 | 588 | add_pe_exported_sym (erva + name_rva, |
3999122f | 589 | func_rva, ordinal, |
1b6bc7e0 | 590 | section_data + sectix, dll_name, objfile); |
3999122f | 591 | ++nbnormal; |
1b6bc7e0 CF |
592 | break; |
593 | } | |
594 | } | |
3999122f PM |
595 | if (!section_found) |
596 | { | |
597 | char *funcname = (char *) (erva + name_rva); | |
598 | ||
599 | if (name_rva == 0) | |
600 | { | |
601 | add_pe_exported_sym (NULL, func_rva, ordinal, | |
602 | section_data, dll_name, objfile); | |
603 | ++nbnormal; | |
604 | } | |
605 | else if (debug_coff_pe_read) | |
606 | fprintf_unfiltered (gdb_stdlog, _("Export name \"%s\" ord. %lu," | |
607 | " RVA 0x%lx in dll \"%s\" not handled\n"), | |
608 | funcname, ordinal, func_rva, dll_name); | |
609 | } | |
1b6bc7e0 CF |
610 | } |
611 | ||
3999122f PM |
612 | if (debug_coff_pe_read) |
613 | fprintf_unfiltered (gdb_stdlog, _("Finished reading \"%s\", exports %ld," | |
614 | " forwards %ld, total %ld/%ld.\n"), dll_name, nbnormal, | |
615 | nbforward, nbnormal + nbforward, nexp); | |
616 | /* Discard expdata and section_data. */ | |
1b6bc7e0 CF |
617 | do_cleanups (back_to); |
618 | } | |
3999122f PM |
619 | |
620 | /* Extract from ABFD the offset of the .text section. | |
621 | This offset is mainly related to the offset within the file. | |
622 | The value was previously expected to be 0x1000 for all files, | |
623 | but some Windows OS core DLLs seem to use 0x10000 section alignement | |
624 | which modified the return value of that function. | |
625 | Still return default 0x1000 value if ABFD is NULL or | |
626 | if '.text' section is not found, but that should not happen... */ | |
627 | ||
628 | #define DEFAULT_COFF_PE_TEXT_SECTION_OFFSET 0x1000 | |
629 | ||
630 | CORE_ADDR | |
631 | pe_text_section_offset (struct bfd *abfd) | |
632 | ||
633 | { | |
634 | unsigned long pe_header_offset, opthdr_ofs, num_entries, i; | |
635 | unsigned long export_rva, export_size, nsections, secptr, expptr; | |
636 | unsigned long exp_funcbase; | |
637 | unsigned char *expdata, *erva; | |
638 | unsigned long name_rvas, ordinals, nexp, ordbase; | |
639 | char *dll_name; | |
640 | int is_pe64 = 0; | |
641 | int is_pe32 = 0; | |
642 | char const *target; | |
643 | ||
644 | if (!abfd) | |
645 | return DEFAULT_COFF_PE_TEXT_SECTION_OFFSET; | |
646 | ||
647 | target = bfd_get_target (abfd); | |
648 | ||
649 | is_pe64 = (strcmp (target, "pe-x86-64") == 0 | |
650 | || strcmp (target, "pei-x86-64") == 0); | |
651 | is_pe32 = (strcmp (target, "pe-i386") == 0 | |
652 | || strcmp (target, "pei-i386") == 0 | |
653 | || strcmp (target, "pe-arm-wince-little") == 0 | |
654 | || strcmp (target, "pei-arm-wince-little") == 0); | |
655 | ||
656 | if (!is_pe32 && !is_pe64) | |
657 | { | |
658 | /* This is not a recognized PE format file. Abort now, because | |
659 | the code is untested on anything else. *FIXME* test on | |
660 | further architectures and loosen or remove this test. */ | |
661 | return DEFAULT_COFF_PE_TEXT_SECTION_OFFSET; | |
662 | } | |
663 | ||
664 | /* Get pe_header, optional header and numbers of sections. */ | |
665 | pe_header_offset = pe_get32 (abfd, 0x3c); | |
666 | opthdr_ofs = pe_header_offset + 4 + 20; | |
667 | nsections = pe_get16 (abfd, pe_header_offset + 4 + 2); | |
668 | secptr = (pe_header_offset + 4 + 20 + | |
669 | pe_get16 (abfd, pe_header_offset + 4 + 16)); | |
670 | ||
671 | /* Get the rva and size of the export section. */ | |
672 | for (i = 0; i < nsections; i++) | |
673 | { | |
674 | char sname[8]; | |
675 | unsigned long secptr1 = secptr + 40 * i; | |
676 | unsigned long vaddr = pe_get32 (abfd, secptr1 + 12); | |
677 | ||
678 | bfd_seek (abfd, (file_ptr) secptr1, SEEK_SET); | |
679 | bfd_bread (sname, (bfd_size_type) 8, abfd); | |
680 | if (strcmp (sname, ".text") == 0) | |
681 | return vaddr; | |
682 | } | |
683 | ||
684 | return DEFAULT_COFF_PE_TEXT_SECTION_OFFSET; | |
685 | } | |
686 | ||
687 | /* Implements "show debug coff_pe_read" command. */ | |
688 | ||
689 | static void | |
690 | show_debug_coff_pe_read (struct ui_file *file, int from_tty, | |
691 | struct cmd_list_element *c, const char *value) | |
692 | { | |
693 | fprintf_filtered (file, _("Coff PE read debugging is %s.\n"), value); | |
694 | } | |
695 | ||
696 | /* Provide a prototype to silence -Wmissing-prototypes. */ | |
697 | ||
698 | void _initialize_coff_pe_read (void); | |
699 | ||
700 | /* Adds "Set/show debug coff_pe_read" commands. */ | |
701 | ||
702 | void | |
703 | _initialize_coff_pe_read (void) | |
704 | { | |
705 | add_setshow_uinteger_cmd ("coff_pe_read", class_maintenance, | |
706 | &debug_coff_pe_read, | |
707 | _("Set coff PE read debugging."), | |
708 | _("Show coff PE read debugging."), | |
709 | _("When set, debugging messages for coff reading " | |
710 | "of exported symbols are displayed."), | |
711 | NULL, show_debug_coff_pe_read, | |
712 | &setdebuglist, &showdebuglist); | |
713 | } |