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 | ||
3999122f PM |
58 | #ifndef IMAGE_SCN_CNT_CODE |
59 | # define IMAGE_SCN_CNT_CODE 0x20 | |
60 | #endif | |
61 | #ifndef IMAGE_SCN_CNT_INITIALIZED_DATA | |
62 | # define IMAGE_SCN_CNT_INITIALIZED_DATA 0x40 | |
63 | #endif | |
64 | #ifndef IMAGE_SCN_CNT_UNINITIALIZED_DATA | |
65 | # define IMAGE_SCN_CNT_UNINITIALIZED_DATA 0x80 | |
66 | #endif | |
1b6bc7e0 CF |
67 | #define PE_SECTION_INDEX_TEXT 0 |
68 | #define PE_SECTION_INDEX_DATA 1 | |
69 | #define PE_SECTION_INDEX_BSS 2 | |
70 | #define PE_SECTION_TABLE_SIZE 3 | |
71 | #define PE_SECTION_INDEX_INVALID -1 | |
72 | \f | |
73 | /* Get the index of the named section in our own array, which contains | |
aff410f1 MS |
74 | text, data and bss in that order. Return PE_SECTION_INDEX_INVALID |
75 | if passed an unrecognised section name. */ | |
1b6bc7e0 CF |
76 | |
77 | static int | |
78 | read_pe_section_index (const char *section_name) | |
79 | { | |
80 | if (strcmp (section_name, ".text") == 0) | |
81 | { | |
82 | return PE_SECTION_INDEX_TEXT; | |
83 | } | |
84 | ||
85 | else if (strcmp (section_name, ".data") == 0) | |
86 | { | |
87 | return PE_SECTION_INDEX_DATA; | |
88 | } | |
89 | ||
90 | else if (strcmp (section_name, ".bss") == 0) | |
91 | { | |
92 | return PE_SECTION_INDEX_BSS; | |
93 | } | |
94 | ||
95 | else | |
96 | { | |
97 | return PE_SECTION_INDEX_INVALID; | |
98 | } | |
99 | } | |
100 | ||
3999122f PM |
101 | /* Get the index of the named section in our own full arrayi. |
102 | text, data and bss in that order. Return PE_SECTION_INDEX_INVALID | |
103 | if passed an unrecognised section name. */ | |
104 | ||
105 | static int | |
106 | get_pe_section_index (const char *section_name, | |
107 | struct read_pe_section_data *sections, | |
108 | int nb_sections) | |
109 | { | |
110 | int i; | |
111 | ||
112 | for (i = 0; i < nb_sections; i++) | |
113 | if (strcmp (sections[i].section_name, section_name) == 0) | |
114 | return i; | |
115 | return PE_SECTION_INDEX_INVALID; | |
116 | } | |
117 | ||
118 | /* Structure used by get_section_vmas function below | |
119 | to access section_data array and the size of the array | |
120 | stored in nb_sections field. */ | |
121 | struct pe_sections_info | |
122 | { | |
123 | int nb_sections; | |
124 | struct read_pe_section_data *sections; | |
125 | }; | |
126 | ||
aff410f1 | 127 | /* Record the virtual memory address of a section. */ |
1b6bc7e0 CF |
128 | |
129 | static void | |
130 | get_section_vmas (bfd *abfd, asection *sectp, void *context) | |
131 | { | |
3999122f PM |
132 | struct pe_sections_info *data = context; |
133 | struct read_pe_section_data *sections = data->sections; | |
134 | int sectix = get_pe_section_index (sectp->name, sections, | |
135 | data->nb_sections); | |
1b6bc7e0 CF |
136 | |
137 | if (sectix != PE_SECTION_INDEX_INVALID) | |
138 | { | |
139 | /* Data within the section start at rva_start in the pe and at | |
aff410f1 | 140 | bfd_get_section_vma() within memory. Store the offset. */ |
1b6bc7e0 CF |
141 | |
142 | sections[sectix].vma_offset | |
143 | = bfd_get_section_vma (abfd, sectp) - sections[sectix].rva_start; | |
144 | } | |
145 | } | |
146 | \f | |
3999122f PM |
147 | /* Create a minimal symbol entry for an exported symbol. |
148 | SYM_NAME contains the exported name or NULL if exported by ordinal, | |
149 | FUNC_RVA contains the Relative Virtual Address of the symbol, | |
150 | ORDINAL is the ordinal index value of the symbol, | |
151 | SECTION_DATA contains information about the section in which the | |
152 | symbol is declared, | |
153 | DLL_NAME is the internal name of the DLL file, | |
154 | OBJFILE is the objfile struct of DLL_NAME. */ | |
1b6bc7e0 CF |
155 | |
156 | static void | |
3999122f | 157 | add_pe_exported_sym (const char *sym_name, |
1b6bc7e0 | 158 | unsigned long func_rva, |
3999122f | 159 | int ordinal, |
1b6bc7e0 CF |
160 | const struct read_pe_section_data *section_data, |
161 | const char *dll_name, struct objfile *objfile) | |
162 | { | |
3999122f | 163 | char *qualified_name, *bare_name; |
aff410f1 | 164 | /* Add the stored offset to get the loaded address of the symbol. */ |
1b6bc7e0 | 165 | CORE_ADDR vma = func_rva + section_data->vma_offset; |
1b6bc7e0 | 166 | int dll_name_len = strlen (dll_name); |
1b6bc7e0 CF |
167 | |
168 | /* Generate a (hopefully unique) qualified name using the first part | |
aff410f1 MS |
169 | of the dll name, e.g. KERNEL32!AddAtomA. This matches the style |
170 | used by windbg from the "Microsoft Debugging Tools for Windows". */ | |
1b6bc7e0 | 171 | |
3999122f PM |
172 | if (sym_name == NULL || *sym_name == '\0') |
173 | bare_name = xstrprintf ("#%d", ordinal); | |
174 | else | |
175 | bare_name = xstrdup (sym_name); | |
176 | ||
177 | qualified_name = xstrprintf ("%s!%s", dll_name, bare_name); | |
1b6bc7e0 | 178 | |
3999122f PM |
179 | if ((section_data->ms_type == mst_unknown) && debug_coff_pe_read) |
180 | fprintf_unfiltered (gdb_stdlog , _("Unknown section type for \"%s\"" | |
181 | " for entry \"%s\" in dll \"%s\"\n"), | |
182 | section_data->section_name, sym_name, dll_name); | |
1b6bc7e0 | 183 | |
3999122f PM |
184 | prim_record_minimal_symbol (qualified_name, vma, |
185 | section_data->ms_type, objfile); | |
1b6bc7e0 | 186 | |
3999122f PM |
187 | /* Enter the plain name as well, which might not be unique. */ |
188 | prim_record_minimal_symbol (bare_name, vma, section_data->ms_type, objfile); | |
189 | if (debug_coff_pe_read > 1) | |
190 | fprintf_unfiltered (gdb_stdlog, _("Adding exported symbol \"%s\"" | |
191 | " in dll \"%s\"\n"), sym_name, dll_name); | |
1b6bc7e0 | 192 | xfree (qualified_name); |
3999122f PM |
193 | xfree (bare_name); |
194 | } | |
195 | ||
196 | /* Create a minimal symbol entry for an exported forward symbol. | |
197 | Return 1 if the forwarded function was found 0 otherwise. | |
198 | SYM_NAME contains the exported name or NULL if exported by ordinal, | |
199 | FORWARD_DLL_NAME is the name of the DLL in which the target symobl resides, | |
200 | FORWARD_FUNC_NAME is the name of the target symbol in that DLL, | |
201 | ORDINAL is the ordinal index value of the symbol, | |
202 | DLL_NAME is the internal name of the DLL file, | |
203 | OBJFILE is the objfile struct of DLL_NAME. */ | |
204 | ||
205 | static int | |
206 | add_pe_forwarded_sym (const char *sym_name, const char *forward_dll_name, | |
207 | const char *forward_func_name, int ordinal, | |
208 | const char *dll_name, struct objfile *objfile) | |
209 | { | |
210 | CORE_ADDR vma; | |
211 | struct objfile *forward_objfile; | |
212 | struct minimal_symbol *msymbol; | |
213 | short section; | |
214 | enum minimal_symbol_type msymtype; | |
215 | int dll_name_len = strlen (dll_name); | |
216 | char *qualified_name, *bare_name; | |
217 | int forward_dll_name_len = strlen (forward_dll_name); | |
218 | int forward_func_name_len = strlen (forward_func_name); | |
219 | int forward_len = forward_dll_name_len + forward_func_name_len + 2; | |
220 | char *forward_qualified_name = alloca (forward_len); | |
221 | ||
222 | xsnprintf (forward_qualified_name, forward_len, "%s!%s", forward_dll_name, | |
223 | forward_func_name); | |
224 | ||
225 | ||
226 | msymbol = lookup_minimal_symbol_and_objfile (forward_qualified_name, | |
227 | &forward_objfile); | |
228 | ||
229 | if (!msymbol) | |
230 | { | |
231 | int i; | |
232 | ||
233 | for (i = 0; i < forward_dll_name_len; i++) | |
234 | forward_qualified_name[i] = tolower (forward_qualified_name[i]); | |
235 | msymbol = lookup_minimal_symbol_and_objfile (forward_qualified_name, | |
236 | &forward_objfile); | |
237 | } | |
238 | ||
239 | if (!msymbol) | |
240 | { | |
241 | if (debug_coff_pe_read) | |
242 | fprintf_unfiltered (gdb_stdlog, _("Unable to find function \"%s\" in" | |
243 | " dll \"%s\", forward of \"%s\" in dll \"%s\"\n"), | |
244 | forward_func_name, forward_dll_name, sym_name, | |
245 | dll_name); | |
246 | return 0; | |
247 | } | |
248 | ||
249 | if (debug_coff_pe_read > 1) | |
250 | fprintf_unfiltered (gdb_stdlog, _("Adding forwarded exported symbol" | |
251 | " \"%s\" in dll \"%s\", pointing to \"%s\"\n"), | |
252 | sym_name, dll_name, forward_qualified_name); | |
253 | ||
254 | vma = SYMBOL_VALUE_ADDRESS (msymbol); | |
255 | section = SYMBOL_SECTION (msymbol); | |
256 | msymtype = MSYMBOL_TYPE (msymbol); | |
257 | ||
258 | /* Generate a (hopefully unique) qualified name using the first part | |
259 | of the dll name, e.g. KERNEL32!AddAtomA. This matches the style | |
260 | used by windbg from the "Microsoft Debugging Tools for Windows". */ | |
261 | ||
262 | if (sym_name == NULL || *sym_name == '\0') | |
263 | bare_name = xstrprintf ("#%d", ordinal); | |
264 | else | |
265 | bare_name = xstrdup (sym_name); | |
266 | ||
267 | qualified_name = xstrprintf ("%s!%s", dll_name, bare_name); | |
268 | ||
269 | prim_record_minimal_symbol (qualified_name, vma, msymtype, objfile); | |
1b6bc7e0 | 270 | |
aff410f1 | 271 | /* Enter the plain name as well, which might not be unique. */ |
3999122f PM |
272 | prim_record_minimal_symbol (bare_name, vma, msymtype, objfile); |
273 | xfree (qualified_name); | |
274 | xfree (bare_name); | |
275 | ||
276 | return 1; | |
1b6bc7e0 CF |
277 | } |
278 | ||
3999122f | 279 | /* Truncate a dll_name at the last dot character. */ |
1b6bc7e0 CF |
280 | |
281 | static void | |
282 | read_pe_truncate_name (char *dll_name) | |
283 | { | |
3999122f | 284 | char *last_point = strrchr (dll_name, '.'); |
1b6bc7e0 | 285 | |
3999122f PM |
286 | if (last_point != NULL) |
287 | *last_point = '\0'; | |
1b6bc7e0 CF |
288 | } |
289 | \f | |
aff410f1 | 290 | /* Low-level support functions, direct from the ld module pe-dll.c. */ |
1b6bc7e0 CF |
291 | static unsigned int |
292 | pe_get16 (bfd *abfd, int where) | |
293 | { | |
294 | unsigned char b[2]; | |
295 | ||
296 | bfd_seek (abfd, (file_ptr) where, SEEK_SET); | |
297 | bfd_bread (b, (bfd_size_type) 2, abfd); | |
298 | return b[0] + (b[1] << 8); | |
299 | } | |
300 | ||
301 | static unsigned int | |
302 | pe_get32 (bfd *abfd, int where) | |
303 | { | |
304 | unsigned char b[4]; | |
305 | ||
306 | bfd_seek (abfd, (file_ptr) where, SEEK_SET); | |
307 | bfd_bread (b, (bfd_size_type) 4, abfd); | |
308 | return b[0] + (b[1] << 8) + (b[2] << 16) + (b[3] << 24); | |
309 | } | |
310 | ||
3999122f PM |
311 | static unsigned int |
312 | pe_as16 (void *ptr) | |
313 | { | |
314 | unsigned char *b = ptr; | |
315 | ||
316 | return b[0] + (b[1] << 8); | |
317 | } | |
318 | ||
1b6bc7e0 CF |
319 | static unsigned int |
320 | pe_as32 (void *ptr) | |
321 | { | |
322 | unsigned char *b = ptr; | |
323 | ||
324 | return b[0] + (b[1] << 8) + (b[2] << 16) + (b[3] << 24); | |
325 | } | |
326 | \f | |
327 | /* Read the (non-debug) export symbol table from a portable | |
aff410f1 MS |
328 | executable. Code originally lifted from the ld function |
329 | pe_implied_import_dll in pe-dll.c. */ | |
1b6bc7e0 CF |
330 | |
331 | void | |
332 | read_pe_exported_syms (struct objfile *objfile) | |
333 | { | |
334 | bfd *dll = objfile->obfd; | |
3999122f | 335 | unsigned long nbnormal, nbforward; |
1b6bc7e0 | 336 | unsigned long pe_header_offset, opthdr_ofs, num_entries, i; |
3999122f | 337 | unsigned long export_opthdrrva, export_opthdrsize; |
1b6bc7e0 CF |
338 | unsigned long export_rva, export_size, nsections, secptr, expptr; |
339 | unsigned long exp_funcbase; | |
340 | unsigned char *expdata, *erva; | |
341 | unsigned long name_rvas, ordinals, nexp, ordbase; | |
3999122f PM |
342 | char *dll_name = (char *) dll->filename; |
343 | int otherix = PE_SECTION_TABLE_SIZE; | |
344 | int exportix = -1; | |
a68ddad5 KT |
345 | int is_pe64 = 0; |
346 | int is_pe32 = 0; | |
1b6bc7e0 CF |
347 | |
348 | /* Array elements are for text, data and bss in that order | |
3999122f | 349 | Initialization with RVA_START > RVA_END guarantees that |
aff410f1 | 350 | unused sections won't be matched. */ |
3999122f PM |
351 | struct read_pe_section_data *section_data; |
352 | struct pe_sections_info pe_sections_info; | |
1b6bc7e0 | 353 | |
3999122f | 354 | struct cleanup *back_to = make_cleanup (null_cleanup, 0); |
1b6bc7e0 CF |
355 | |
356 | char const *target = bfd_get_target (objfile->obfd); | |
357 | ||
3999122f PM |
358 | section_data = xzalloc (PE_SECTION_TABLE_SIZE |
359 | * sizeof (struct read_pe_section_data)); | |
360 | ||
361 | make_cleanup (free_current_contents, §ion_data); | |
362 | ||
363 | for (i=0; i < PE_SECTION_TABLE_SIZE; i++) | |
364 | { | |
365 | section_data[i].vma_offset = 0; | |
366 | section_data[i].rva_start = 1; | |
367 | section_data[i].rva_end = 0; | |
368 | }; | |
369 | section_data[PE_SECTION_INDEX_TEXT].ms_type = mst_text; | |
370 | section_data[PE_SECTION_INDEX_TEXT].section_name = ".text"; | |
371 | section_data[PE_SECTION_INDEX_DATA].ms_type = mst_data; | |
372 | section_data[PE_SECTION_INDEX_DATA].section_name = ".data"; | |
373 | section_data[PE_SECTION_INDEX_BSS].ms_type = mst_bss; | |
374 | section_data[PE_SECTION_INDEX_BSS].section_name = ".bss"; | |
375 | ||
5e13bd89 PA |
376 | is_pe64 = (strcmp (target, "pe-x86-64") == 0 |
377 | || strcmp (target, "pei-x86-64") == 0); | |
378 | is_pe32 = (strcmp (target, "pe-i386") == 0 | |
379 | || strcmp (target, "pei-i386") == 0 | |
380 | || strcmp (target, "pe-arm-wince-little") == 0 | |
381 | || strcmp (target, "pei-arm-wince-little") == 0); | |
a68ddad5 | 382 | if (!is_pe32 && !is_pe64) |
1b6bc7e0 | 383 | { |
5e13bd89 PA |
384 | /* This is not a recognized PE format file. Abort now, because |
385 | the code is untested on anything else. *FIXME* test on | |
aff410f1 | 386 | further architectures and loosen or remove this test. */ |
1b6bc7e0 CF |
387 | return; |
388 | } | |
389 | ||
390 | /* Get pe_header, optional header and numbers of export entries. */ | |
391 | pe_header_offset = pe_get32 (dll, 0x3c); | |
392 | opthdr_ofs = pe_header_offset + 4 + 20; | |
a68ddad5 | 393 | if (is_pe64) |
1dac1b47 | 394 | num_entries = pe_get32 (dll, opthdr_ofs + 108); |
a68ddad5 KT |
395 | else |
396 | num_entries = pe_get32 (dll, opthdr_ofs + 92); | |
1b6bc7e0 CF |
397 | |
398 | if (num_entries < 1) /* No exports. */ | |
399 | { | |
400 | return; | |
401 | } | |
a68ddad5 KT |
402 | if (is_pe64) |
403 | { | |
3999122f PM |
404 | export_opthdrrva = pe_get32 (dll, opthdr_ofs + 112); |
405 | export_opthdrsize = pe_get32 (dll, opthdr_ofs + 116); | |
a68ddad5 KT |
406 | } |
407 | else | |
408 | { | |
3999122f PM |
409 | export_opthdrrva = pe_get32 (dll, opthdr_ofs + 96); |
410 | export_opthdrsize = pe_get32 (dll, opthdr_ofs + 100); | |
a68ddad5 | 411 | } |
1b6bc7e0 CF |
412 | nsections = pe_get16 (dll, pe_header_offset + 4 + 2); |
413 | secptr = (pe_header_offset + 4 + 20 + | |
414 | pe_get16 (dll, pe_header_offset + 4 + 16)); | |
415 | expptr = 0; | |
3999122f | 416 | export_size = 0; |
1b6bc7e0 CF |
417 | |
418 | /* Get the rva and size of the export section. */ | |
419 | for (i = 0; i < nsections; i++) | |
420 | { | |
421 | char sname[8]; | |
422 | unsigned long secptr1 = secptr + 40 * i; | |
423 | unsigned long vaddr = pe_get32 (dll, secptr1 + 12); | |
424 | unsigned long vsize = pe_get32 (dll, secptr1 + 16); | |
425 | unsigned long fptr = pe_get32 (dll, secptr1 + 20); | |
426 | ||
427 | bfd_seek (dll, (file_ptr) secptr1, SEEK_SET); | |
3999122f | 428 | bfd_bread (sname, (bfd_size_type) sizeof (sname), dll); |
1b6bc7e0 | 429 | |
3999122f PM |
430 | if ((strcmp (sname, ".edata") == 0) |
431 | || (vaddr <= export_opthdrrva && export_opthdrrva < vaddr + vsize)) | |
1b6bc7e0 | 432 | { |
3999122f PM |
433 | if (strcmp (sname, ".edata") != 0) |
434 | { | |
435 | if (debug_coff_pe_read) | |
436 | fprintf_unfiltered (gdb_stdlog, _("Export RVA for dll " | |
437 | "\"%s\" is in section \"%s\"\n"), | |
438 | dll_name, sname); | |
439 | } | |
440 | else if (export_opthdrrva != vaddr && debug_coff_pe_read) | |
441 | fprintf_unfiltered (gdb_stdlog, _("Wrong value of export RVA" | |
442 | " for dll \"%s\": 0x%lx instead of 0x%lx\n"), | |
443 | dll_name, export_opthdrrva, vaddr); | |
444 | expptr = fptr + (export_opthdrrva - vaddr); | |
445 | exportix = i; | |
1b6bc7e0 CF |
446 | break; |
447 | } | |
448 | } | |
449 | ||
3999122f PM |
450 | export_rva = export_opthdrrva; |
451 | export_size = export_opthdrsize; | |
452 | ||
1b6bc7e0 CF |
453 | if (export_size == 0) |
454 | { | |
aff410f1 | 455 | /* Empty export table. */ |
1b6bc7e0 CF |
456 | return; |
457 | } | |
458 | ||
aff410f1 MS |
459 | /* Scan sections and store the base and size of the relevant |
460 | sections. */ | |
1b6bc7e0 CF |
461 | for (i = 0; i < nsections; i++) |
462 | { | |
463 | unsigned long secptr1 = secptr + 40 * i; | |
464 | unsigned long vsize = pe_get32 (dll, secptr1 + 8); | |
465 | unsigned long vaddr = pe_get32 (dll, secptr1 + 12); | |
3999122f | 466 | unsigned long characteristics = pe_get32 (dll, secptr1 + 36); |
1b6bc7e0 CF |
467 | char sec_name[9]; |
468 | int sectix; | |
469 | ||
3999122f | 470 | memset (sec_name, 0, sizeof (sec_name)); |
1b6bc7e0 CF |
471 | bfd_seek (dll, (file_ptr) secptr1 + 0, SEEK_SET); |
472 | bfd_bread (sec_name, (bfd_size_type) 8, dll); | |
473 | ||
474 | sectix = read_pe_section_index (sec_name); | |
475 | ||
476 | if (sectix != PE_SECTION_INDEX_INVALID) | |
477 | { | |
478 | section_data[sectix].rva_start = vaddr; | |
479 | section_data[sectix].rva_end = vaddr + vsize; | |
480 | } | |
3999122f PM |
481 | else |
482 | { | |
483 | char *name; | |
484 | ||
485 | section_data = xrealloc (section_data, (otherix + 1) | |
486 | * sizeof (struct read_pe_section_data)); | |
487 | name = xstrdup (sec_name); | |
488 | section_data[otherix].section_name = name; | |
489 | make_cleanup (xfree, name); | |
490 | section_data[otherix].rva_start = vaddr; | |
491 | section_data[otherix].rva_end = vaddr + vsize; | |
492 | section_data[otherix].vma_offset = 0; | |
493 | if (characteristics & IMAGE_SCN_CNT_CODE) | |
494 | section_data[otherix].ms_type = mst_text; | |
495 | else if (characteristics & IMAGE_SCN_CNT_INITIALIZED_DATA) | |
496 | section_data[otherix].ms_type = mst_data; | |
497 | else if (characteristics & IMAGE_SCN_CNT_UNINITIALIZED_DATA) | |
498 | section_data[otherix].ms_type = mst_bss; | |
499 | else | |
500 | section_data[otherix].ms_type = mst_unknown; | |
501 | otherix++; | |
502 | } | |
1b6bc7e0 CF |
503 | } |
504 | ||
505 | expdata = (unsigned char *) xmalloc (export_size); | |
3999122f | 506 | make_cleanup (xfree, expdata); |
1b6bc7e0 CF |
507 | |
508 | bfd_seek (dll, (file_ptr) expptr, SEEK_SET); | |
509 | bfd_bread (expdata, (bfd_size_type) export_size, dll); | |
510 | erva = expdata - export_rva; | |
511 | ||
512 | nexp = pe_as32 (expdata + 24); | |
513 | name_rvas = pe_as32 (expdata + 32); | |
514 | ordinals = pe_as32 (expdata + 36); | |
515 | ordbase = pe_as32 (expdata + 16); | |
516 | exp_funcbase = pe_as32 (expdata + 28); | |
517 | ||
aff410f1 | 518 | /* Use internal dll name instead of full pathname. */ |
1b6bc7e0 CF |
519 | dll_name = pe_as32 (expdata + 12) + erva; |
520 | ||
3999122f PM |
521 | pe_sections_info.nb_sections = otherix; |
522 | pe_sections_info.sections = section_data; | |
523 | ||
524 | bfd_map_over_sections (dll, get_section_vmas, &pe_sections_info); | |
1b6bc7e0 CF |
525 | |
526 | /* Adjust the vma_offsets in case this PE got relocated. This | |
527 | assumes that *all* sections share the same relocation offset | |
aff410f1 | 528 | as the text section. */ |
3999122f | 529 | for (i = 0; i < otherix; i++) |
1b6bc7e0 CF |
530 | { |
531 | section_data[i].vma_offset | |
532 | += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
533 | } | |
534 | ||
1b6bc7e0 | 535 | /* Truncate name at first dot. Should maybe also convert to all |
aff410f1 | 536 | lower case for convenience on Windows. */ |
1b6bc7e0 CF |
537 | read_pe_truncate_name (dll_name); |
538 | ||
3999122f PM |
539 | if (debug_coff_pe_read) |
540 | fprintf_unfiltered (gdb_stdlog, _("DLL \"%s\" has %ld export entries," | |
541 | " base=%ld\n"), dll_name, nexp, ordbase); | |
542 | nbforward = 0; | |
543 | nbnormal = 0; | |
1b6bc7e0 CF |
544 | /* Iterate through the list of symbols. */ |
545 | for (i = 0; i < nexp; i++) | |
546 | { | |
547 | /* Pointer to the names vector. */ | |
548 | unsigned long name_rva = pe_as32 (erva + name_rvas + i * 4); | |
3999122f PM |
549 | /* Retrieve ordinal value. */ |
550 | ||
551 | unsigned long ordinal = pe_as16 (erva + ordinals + i * 2); | |
552 | ||
1b6bc7e0 CF |
553 | |
554 | /* Pointer to the function address vector. */ | |
3999122f PM |
555 | /* This is relatived to ordinal value. */ |
556 | unsigned long func_rva = pe_as32 (erva + exp_funcbase + | |
557 | ordinal * 4); | |
1b6bc7e0 | 558 | |
aff410f1 | 559 | /* Find this symbol's section in our own array. */ |
1b6bc7e0 | 560 | int sectix = 0; |
3999122f PM |
561 | int section_found = 0; |
562 | ||
563 | /* First handle forward cases. */ | |
564 | if (func_rva >= export_rva && func_rva < export_rva + export_size) | |
565 | { | |
566 | char *forward_name = (char *) (erva + func_rva); | |
567 | char *funcname = (char *) (erva + name_rva); | |
568 | char *forward_dll_name = forward_name; | |
569 | char *forward_func_name = forward_name; | |
570 | char *sep = strrchr (forward_name, '.'); | |
571 | ||
572 | if (sep) | |
573 | { | |
574 | int len = (int) (sep - forward_name); | |
1b6bc7e0 | 575 | |
3999122f PM |
576 | forward_dll_name = alloca (len + 1); |
577 | strncpy (forward_dll_name, forward_name, len); | |
578 | forward_dll_name[len] = '\0'; | |
579 | forward_func_name = ++sep; | |
580 | } | |
581 | if (add_pe_forwarded_sym (funcname, forward_dll_name, | |
582 | forward_func_name, ordinal, | |
583 | dll_name, objfile) != 0) | |
584 | ++nbforward; | |
585 | continue; | |
586 | } | |
587 | ||
588 | for (sectix = 0; sectix < otherix; ++sectix) | |
1b6bc7e0 CF |
589 | { |
590 | if ((func_rva >= section_data[sectix].rva_start) | |
591 | && (func_rva < section_data[sectix].rva_end)) | |
592 | { | |
3999122f | 593 | section_found = 1; |
1b6bc7e0 | 594 | add_pe_exported_sym (erva + name_rva, |
3999122f | 595 | func_rva, ordinal, |
1b6bc7e0 | 596 | section_data + sectix, dll_name, objfile); |
3999122f | 597 | ++nbnormal; |
1b6bc7e0 CF |
598 | break; |
599 | } | |
600 | } | |
3999122f PM |
601 | if (!section_found) |
602 | { | |
603 | char *funcname = (char *) (erva + name_rva); | |
604 | ||
605 | if (name_rva == 0) | |
606 | { | |
607 | add_pe_exported_sym (NULL, func_rva, ordinal, | |
608 | section_data, dll_name, objfile); | |
609 | ++nbnormal; | |
610 | } | |
611 | else if (debug_coff_pe_read) | |
612 | fprintf_unfiltered (gdb_stdlog, _("Export name \"%s\" ord. %lu," | |
613 | " RVA 0x%lx in dll \"%s\" not handled\n"), | |
614 | funcname, ordinal, func_rva, dll_name); | |
615 | } | |
1b6bc7e0 CF |
616 | } |
617 | ||
3999122f PM |
618 | if (debug_coff_pe_read) |
619 | fprintf_unfiltered (gdb_stdlog, _("Finished reading \"%s\", exports %ld," | |
620 | " forwards %ld, total %ld/%ld.\n"), dll_name, nbnormal, | |
621 | nbforward, nbnormal + nbforward, nexp); | |
622 | /* Discard expdata and section_data. */ | |
1b6bc7e0 CF |
623 | do_cleanups (back_to); |
624 | } | |
3999122f PM |
625 | |
626 | /* Extract from ABFD the offset of the .text section. | |
627 | This offset is mainly related to the offset within the file. | |
628 | The value was previously expected to be 0x1000 for all files, | |
629 | but some Windows OS core DLLs seem to use 0x10000 section alignement | |
630 | which modified the return value of that function. | |
631 | Still return default 0x1000 value if ABFD is NULL or | |
632 | if '.text' section is not found, but that should not happen... */ | |
633 | ||
634 | #define DEFAULT_COFF_PE_TEXT_SECTION_OFFSET 0x1000 | |
635 | ||
636 | CORE_ADDR | |
637 | pe_text_section_offset (struct bfd *abfd) | |
638 | ||
639 | { | |
640 | unsigned long pe_header_offset, opthdr_ofs, num_entries, i; | |
641 | unsigned long export_rva, export_size, nsections, secptr, expptr; | |
642 | unsigned long exp_funcbase; | |
643 | unsigned char *expdata, *erva; | |
644 | unsigned long name_rvas, ordinals, nexp, ordbase; | |
645 | char *dll_name; | |
646 | int is_pe64 = 0; | |
647 | int is_pe32 = 0; | |
648 | char const *target; | |
649 | ||
650 | if (!abfd) | |
651 | return DEFAULT_COFF_PE_TEXT_SECTION_OFFSET; | |
652 | ||
653 | target = bfd_get_target (abfd); | |
654 | ||
655 | is_pe64 = (strcmp (target, "pe-x86-64") == 0 | |
656 | || strcmp (target, "pei-x86-64") == 0); | |
657 | is_pe32 = (strcmp (target, "pe-i386") == 0 | |
658 | || strcmp (target, "pei-i386") == 0 | |
659 | || strcmp (target, "pe-arm-wince-little") == 0 | |
660 | || strcmp (target, "pei-arm-wince-little") == 0); | |
661 | ||
662 | if (!is_pe32 && !is_pe64) | |
663 | { | |
664 | /* This is not a recognized PE format file. Abort now, because | |
665 | the code is untested on anything else. *FIXME* test on | |
666 | further architectures and loosen or remove this test. */ | |
667 | return DEFAULT_COFF_PE_TEXT_SECTION_OFFSET; | |
668 | } | |
669 | ||
670 | /* Get pe_header, optional header and numbers of sections. */ | |
671 | pe_header_offset = pe_get32 (abfd, 0x3c); | |
672 | opthdr_ofs = pe_header_offset + 4 + 20; | |
673 | nsections = pe_get16 (abfd, pe_header_offset + 4 + 2); | |
674 | secptr = (pe_header_offset + 4 + 20 + | |
675 | pe_get16 (abfd, pe_header_offset + 4 + 16)); | |
676 | ||
677 | /* Get the rva and size of the export section. */ | |
678 | for (i = 0; i < nsections; i++) | |
679 | { | |
680 | char sname[8]; | |
681 | unsigned long secptr1 = secptr + 40 * i; | |
682 | unsigned long vaddr = pe_get32 (abfd, secptr1 + 12); | |
683 | ||
684 | bfd_seek (abfd, (file_ptr) secptr1, SEEK_SET); | |
685 | bfd_bread (sname, (bfd_size_type) 8, abfd); | |
686 | if (strcmp (sname, ".text") == 0) | |
687 | return vaddr; | |
688 | } | |
689 | ||
690 | return DEFAULT_COFF_PE_TEXT_SECTION_OFFSET; | |
691 | } | |
692 | ||
693 | /* Implements "show debug coff_pe_read" command. */ | |
694 | ||
695 | static void | |
696 | show_debug_coff_pe_read (struct ui_file *file, int from_tty, | |
697 | struct cmd_list_element *c, const char *value) | |
698 | { | |
699 | fprintf_filtered (file, _("Coff PE read debugging is %s.\n"), value); | |
700 | } | |
701 | ||
702 | /* Provide a prototype to silence -Wmissing-prototypes. */ | |
703 | ||
704 | void _initialize_coff_pe_read (void); | |
705 | ||
706 | /* Adds "Set/show debug coff_pe_read" commands. */ | |
707 | ||
708 | void | |
709 | _initialize_coff_pe_read (void) | |
710 | { | |
711 | add_setshow_uinteger_cmd ("coff_pe_read", class_maintenance, | |
712 | &debug_coff_pe_read, | |
713 | _("Set coff PE read debugging."), | |
714 | _("Show coff PE read debugging."), | |
715 | _("When set, debugging messages for coff reading " | |
716 | "of exported symbols are displayed."), | |
717 | NULL, show_debug_coff_pe_read, | |
718 | &setdebuglist, &showdebuglist); | |
719 | } |