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 | ||
28e7fd62 | 5 | Copyright (C) 2003-2013 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 | 36 | #include "common/common-utils.h" |
aab2f004 | 37 | #include "coff/internal.h" |
3999122f PM |
38 | |
39 | #include <ctype.h> | |
1b6bc7e0 CF |
40 | |
41 | /* Internal section information */ | |
42 | ||
3999122f PM |
43 | /* Coff PE read debugging flag: |
44 | default value is 0, | |
45 | value 1 outputs problems encountered while parsing PE file, | |
46 | value above 1 also lists all generated minimal symbols. */ | |
47 | static unsigned int debug_coff_pe_read; | |
48 | ||
1b6bc7e0 CF |
49 | struct read_pe_section_data |
50 | { | |
aff410f1 MS |
51 | CORE_ADDR vma_offset; /* Offset to loaded address of section. */ |
52 | unsigned long rva_start; /* Start offset within the pe. */ | |
53 | unsigned long rva_end; /* End offset within the pe. */ | |
54 | enum minimal_symbol_type ms_type; /* Type to assign symbols in | |
55 | section. */ | |
3999122f | 56 | char *section_name; /* Recorded section name. */ |
1b6bc7e0 CF |
57 | }; |
58 | ||
78ea0eca PM |
59 | #define IMAGE_SCN_CNT_CODE 0x20 |
60 | #define IMAGE_SCN_CNT_INITIALIZED_DATA 0x40 | |
61 | #define IMAGE_SCN_CNT_UNINITIALIZED_DATA 0x80 | |
1b6bc7e0 CF |
62 | #define PE_SECTION_INDEX_TEXT 0 |
63 | #define PE_SECTION_INDEX_DATA 1 | |
64 | #define PE_SECTION_INDEX_BSS 2 | |
65 | #define PE_SECTION_TABLE_SIZE 3 | |
66 | #define PE_SECTION_INDEX_INVALID -1 | |
67 | \f | |
68 | /* Get the index of the named section in our own array, which contains | |
aff410f1 MS |
69 | text, data and bss in that order. Return PE_SECTION_INDEX_INVALID |
70 | if passed an unrecognised section name. */ | |
1b6bc7e0 CF |
71 | |
72 | static int | |
73 | read_pe_section_index (const char *section_name) | |
74 | { | |
75 | if (strcmp (section_name, ".text") == 0) | |
76 | { | |
77 | return PE_SECTION_INDEX_TEXT; | |
78 | } | |
79 | ||
80 | else if (strcmp (section_name, ".data") == 0) | |
81 | { | |
82 | return PE_SECTION_INDEX_DATA; | |
83 | } | |
84 | ||
85 | else if (strcmp (section_name, ".bss") == 0) | |
86 | { | |
87 | return PE_SECTION_INDEX_BSS; | |
88 | } | |
89 | ||
90 | else | |
91 | { | |
92 | return PE_SECTION_INDEX_INVALID; | |
93 | } | |
94 | } | |
95 | ||
3999122f PM |
96 | /* Get the index of the named section in our own full arrayi. |
97 | text, data and bss in that order. Return PE_SECTION_INDEX_INVALID | |
98 | if passed an unrecognised section name. */ | |
99 | ||
100 | static int | |
101 | get_pe_section_index (const char *section_name, | |
102 | struct read_pe_section_data *sections, | |
103 | int nb_sections) | |
104 | { | |
105 | int i; | |
106 | ||
107 | for (i = 0; i < nb_sections; i++) | |
108 | if (strcmp (sections[i].section_name, section_name) == 0) | |
109 | return i; | |
110 | return PE_SECTION_INDEX_INVALID; | |
111 | } | |
112 | ||
113 | /* Structure used by get_section_vmas function below | |
114 | to access section_data array and the size of the array | |
115 | stored in nb_sections field. */ | |
116 | struct pe_sections_info | |
117 | { | |
118 | int nb_sections; | |
119 | struct read_pe_section_data *sections; | |
120 | }; | |
121 | ||
aff410f1 | 122 | /* Record the virtual memory address of a section. */ |
1b6bc7e0 CF |
123 | |
124 | static void | |
125 | get_section_vmas (bfd *abfd, asection *sectp, void *context) | |
126 | { | |
3999122f PM |
127 | struct pe_sections_info *data = context; |
128 | struct read_pe_section_data *sections = data->sections; | |
129 | int sectix = get_pe_section_index (sectp->name, sections, | |
130 | data->nb_sections); | |
1b6bc7e0 CF |
131 | |
132 | if (sectix != PE_SECTION_INDEX_INVALID) | |
133 | { | |
134 | /* Data within the section start at rva_start in the pe and at | |
aff410f1 | 135 | bfd_get_section_vma() within memory. Store the offset. */ |
1b6bc7e0 CF |
136 | |
137 | sections[sectix].vma_offset | |
138 | = bfd_get_section_vma (abfd, sectp) - sections[sectix].rva_start; | |
139 | } | |
140 | } | |
141 | \f | |
3999122f PM |
142 | /* Create a minimal symbol entry for an exported symbol. |
143 | SYM_NAME contains the exported name or NULL if exported by ordinal, | |
144 | FUNC_RVA contains the Relative Virtual Address of the symbol, | |
145 | ORDINAL is the ordinal index value of the symbol, | |
146 | SECTION_DATA contains information about the section in which the | |
147 | symbol is declared, | |
148 | DLL_NAME is the internal name of the DLL file, | |
149 | OBJFILE is the objfile struct of DLL_NAME. */ | |
1b6bc7e0 CF |
150 | |
151 | static void | |
3999122f | 152 | add_pe_exported_sym (const char *sym_name, |
1b6bc7e0 | 153 | unsigned long func_rva, |
3999122f | 154 | int ordinal, |
1b6bc7e0 CF |
155 | const struct read_pe_section_data *section_data, |
156 | const char *dll_name, struct objfile *objfile) | |
157 | { | |
3999122f | 158 | char *qualified_name, *bare_name; |
aff410f1 | 159 | /* Add the stored offset to get the loaded address of the symbol. */ |
1b6bc7e0 | 160 | CORE_ADDR vma = func_rva + section_data->vma_offset; |
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; | |
7cbd4a93 | 205 | struct bound_minimal_symbol msymbol; |
3999122f | 206 | enum minimal_symbol_type msymtype; |
3999122f PM |
207 | char *qualified_name, *bare_name; |
208 | int forward_dll_name_len = strlen (forward_dll_name); | |
209 | int forward_func_name_len = strlen (forward_func_name); | |
210 | int forward_len = forward_dll_name_len + forward_func_name_len + 2; | |
211 | char *forward_qualified_name = alloca (forward_len); | |
212 | ||
213 | xsnprintf (forward_qualified_name, forward_len, "%s!%s", forward_dll_name, | |
214 | forward_func_name); | |
215 | ||
216 | ||
7cbd4a93 | 217 | msymbol = lookup_minimal_symbol_and_objfile (forward_qualified_name); |
3999122f | 218 | |
7cbd4a93 | 219 | if (!msymbol.minsym) |
3999122f PM |
220 | { |
221 | int i; | |
222 | ||
223 | for (i = 0; i < forward_dll_name_len; i++) | |
224 | forward_qualified_name[i] = tolower (forward_qualified_name[i]); | |
7cbd4a93 | 225 | msymbol = lookup_minimal_symbol_and_objfile (forward_qualified_name); |
3999122f PM |
226 | } |
227 | ||
7cbd4a93 | 228 | if (!msymbol.minsym) |
3999122f PM |
229 | { |
230 | if (debug_coff_pe_read) | |
231 | fprintf_unfiltered (gdb_stdlog, _("Unable to find function \"%s\" in" | |
232 | " dll \"%s\", forward of \"%s\" in dll \"%s\"\n"), | |
233 | forward_func_name, forward_dll_name, sym_name, | |
234 | dll_name); | |
235 | return 0; | |
236 | } | |
237 | ||
238 | if (debug_coff_pe_read > 1) | |
239 | fprintf_unfiltered (gdb_stdlog, _("Adding forwarded exported symbol" | |
240 | " \"%s\" in dll \"%s\", pointing to \"%s\"\n"), | |
241 | sym_name, dll_name, forward_qualified_name); | |
242 | ||
7cbd4a93 TT |
243 | vma = SYMBOL_VALUE_ADDRESS (msymbol.minsym); |
244 | msymtype = MSYMBOL_TYPE (msymbol.minsym); | |
3999122f PM |
245 | |
246 | /* Generate a (hopefully unique) qualified name using the first part | |
247 | of the dll name, e.g. KERNEL32!AddAtomA. This matches the style | |
248 | used by windbg from the "Microsoft Debugging Tools for Windows". */ | |
249 | ||
250 | if (sym_name == NULL || *sym_name == '\0') | |
251 | bare_name = xstrprintf ("#%d", ordinal); | |
252 | else | |
253 | bare_name = xstrdup (sym_name); | |
254 | ||
255 | qualified_name = xstrprintf ("%s!%s", dll_name, bare_name); | |
256 | ||
257 | prim_record_minimal_symbol (qualified_name, vma, msymtype, objfile); | |
1b6bc7e0 | 258 | |
aff410f1 | 259 | /* Enter the plain name as well, which might not be unique. */ |
3999122f PM |
260 | prim_record_minimal_symbol (bare_name, vma, msymtype, objfile); |
261 | xfree (qualified_name); | |
262 | xfree (bare_name); | |
263 | ||
264 | return 1; | |
1b6bc7e0 CF |
265 | } |
266 | ||
3999122f | 267 | /* Truncate a dll_name at the last dot character. */ |
1b6bc7e0 CF |
268 | |
269 | static void | |
270 | read_pe_truncate_name (char *dll_name) | |
271 | { | |
3999122f | 272 | char *last_point = strrchr (dll_name, '.'); |
1b6bc7e0 | 273 | |
3999122f PM |
274 | if (last_point != NULL) |
275 | *last_point = '\0'; | |
1b6bc7e0 CF |
276 | } |
277 | \f | |
aff410f1 | 278 | /* Low-level support functions, direct from the ld module pe-dll.c. */ |
1b6bc7e0 CF |
279 | static unsigned int |
280 | pe_get16 (bfd *abfd, int where) | |
281 | { | |
282 | unsigned char b[2]; | |
283 | ||
284 | bfd_seek (abfd, (file_ptr) where, SEEK_SET); | |
285 | bfd_bread (b, (bfd_size_type) 2, abfd); | |
286 | return b[0] + (b[1] << 8); | |
287 | } | |
288 | ||
289 | static unsigned int | |
290 | pe_get32 (bfd *abfd, int where) | |
291 | { | |
292 | unsigned char b[4]; | |
293 | ||
294 | bfd_seek (abfd, (file_ptr) where, SEEK_SET); | |
295 | bfd_bread (b, (bfd_size_type) 4, abfd); | |
296 | return b[0] + (b[1] << 8) + (b[2] << 16) + (b[3] << 24); | |
297 | } | |
298 | ||
3999122f PM |
299 | static unsigned int |
300 | pe_as16 (void *ptr) | |
301 | { | |
302 | unsigned char *b = ptr; | |
303 | ||
304 | return b[0] + (b[1] << 8); | |
305 | } | |
306 | ||
1b6bc7e0 CF |
307 | static unsigned int |
308 | pe_as32 (void *ptr) | |
309 | { | |
310 | unsigned char *b = ptr; | |
311 | ||
312 | return b[0] + (b[1] << 8) + (b[2] << 16) + (b[3] << 24); | |
313 | } | |
314 | \f | |
315 | /* Read the (non-debug) export symbol table from a portable | |
aff410f1 MS |
316 | executable. Code originally lifted from the ld function |
317 | pe_implied_import_dll in pe-dll.c. */ | |
1b6bc7e0 CF |
318 | |
319 | void | |
320 | read_pe_exported_syms (struct objfile *objfile) | |
321 | { | |
322 | bfd *dll = objfile->obfd; | |
3999122f | 323 | unsigned long nbnormal, nbforward; |
1b6bc7e0 | 324 | unsigned long pe_header_offset, opthdr_ofs, num_entries, i; |
3999122f | 325 | unsigned long export_opthdrrva, export_opthdrsize; |
1b6bc7e0 CF |
326 | unsigned long export_rva, export_size, nsections, secptr, expptr; |
327 | unsigned long exp_funcbase; | |
328 | unsigned char *expdata, *erva; | |
329 | unsigned long name_rvas, ordinals, nexp, ordbase; | |
3999122f PM |
330 | char *dll_name = (char *) dll->filename; |
331 | int otherix = PE_SECTION_TABLE_SIZE; | |
a68ddad5 KT |
332 | int is_pe64 = 0; |
333 | int is_pe32 = 0; | |
1b6bc7e0 CF |
334 | |
335 | /* Array elements are for text, data and bss in that order | |
3999122f | 336 | Initialization with RVA_START > RVA_END guarantees that |
aff410f1 | 337 | unused sections won't be matched. */ |
3999122f PM |
338 | struct read_pe_section_data *section_data; |
339 | struct pe_sections_info pe_sections_info; | |
1b6bc7e0 | 340 | |
3999122f | 341 | struct cleanup *back_to = make_cleanup (null_cleanup, 0); |
1b6bc7e0 CF |
342 | |
343 | char const *target = bfd_get_target (objfile->obfd); | |
344 | ||
3999122f PM |
345 | section_data = xzalloc (PE_SECTION_TABLE_SIZE |
346 | * sizeof (struct read_pe_section_data)); | |
347 | ||
348 | make_cleanup (free_current_contents, §ion_data); | |
349 | ||
350 | for (i=0; i < PE_SECTION_TABLE_SIZE; i++) | |
351 | { | |
352 | section_data[i].vma_offset = 0; | |
353 | section_data[i].rva_start = 1; | |
354 | section_data[i].rva_end = 0; | |
355 | }; | |
356 | section_data[PE_SECTION_INDEX_TEXT].ms_type = mst_text; | |
357 | section_data[PE_SECTION_INDEX_TEXT].section_name = ".text"; | |
358 | section_data[PE_SECTION_INDEX_DATA].ms_type = mst_data; | |
359 | section_data[PE_SECTION_INDEX_DATA].section_name = ".data"; | |
360 | section_data[PE_SECTION_INDEX_BSS].ms_type = mst_bss; | |
361 | section_data[PE_SECTION_INDEX_BSS].section_name = ".bss"; | |
362 | ||
5e13bd89 PA |
363 | is_pe64 = (strcmp (target, "pe-x86-64") == 0 |
364 | || strcmp (target, "pei-x86-64") == 0); | |
365 | is_pe32 = (strcmp (target, "pe-i386") == 0 | |
366 | || strcmp (target, "pei-i386") == 0 | |
367 | || strcmp (target, "pe-arm-wince-little") == 0 | |
368 | || strcmp (target, "pei-arm-wince-little") == 0); | |
a68ddad5 | 369 | if (!is_pe32 && !is_pe64) |
1b6bc7e0 | 370 | { |
5e13bd89 PA |
371 | /* This is not a recognized PE format file. Abort now, because |
372 | the code is untested on anything else. *FIXME* test on | |
aff410f1 | 373 | further architectures and loosen or remove this test. */ |
feb14725 | 374 | do_cleanups (back_to); |
1b6bc7e0 CF |
375 | return; |
376 | } | |
377 | ||
378 | /* Get pe_header, optional header and numbers of export entries. */ | |
379 | pe_header_offset = pe_get32 (dll, 0x3c); | |
380 | opthdr_ofs = pe_header_offset + 4 + 20; | |
a68ddad5 | 381 | if (is_pe64) |
1dac1b47 | 382 | num_entries = pe_get32 (dll, opthdr_ofs + 108); |
a68ddad5 KT |
383 | else |
384 | num_entries = pe_get32 (dll, opthdr_ofs + 92); | |
1b6bc7e0 CF |
385 | |
386 | if (num_entries < 1) /* No exports. */ | |
387 | { | |
feb14725 | 388 | do_cleanups (back_to); |
1b6bc7e0 CF |
389 | return; |
390 | } | |
a68ddad5 KT |
391 | if (is_pe64) |
392 | { | |
3999122f PM |
393 | export_opthdrrva = pe_get32 (dll, opthdr_ofs + 112); |
394 | export_opthdrsize = pe_get32 (dll, opthdr_ofs + 116); | |
a68ddad5 KT |
395 | } |
396 | else | |
397 | { | |
3999122f PM |
398 | export_opthdrrva = pe_get32 (dll, opthdr_ofs + 96); |
399 | export_opthdrsize = pe_get32 (dll, opthdr_ofs + 100); | |
a68ddad5 | 400 | } |
1b6bc7e0 CF |
401 | nsections = pe_get16 (dll, pe_header_offset + 4 + 2); |
402 | secptr = (pe_header_offset + 4 + 20 + | |
403 | pe_get16 (dll, pe_header_offset + 4 + 16)); | |
404 | expptr = 0; | |
3999122f | 405 | export_size = 0; |
1b6bc7e0 CF |
406 | |
407 | /* Get the rva and size of the export section. */ | |
408 | for (i = 0; i < nsections; i++) | |
409 | { | |
410 | char sname[8]; | |
411 | unsigned long secptr1 = secptr + 40 * i; | |
412 | unsigned long vaddr = pe_get32 (dll, secptr1 + 12); | |
413 | unsigned long vsize = pe_get32 (dll, secptr1 + 16); | |
414 | unsigned long fptr = pe_get32 (dll, secptr1 + 20); | |
415 | ||
416 | bfd_seek (dll, (file_ptr) secptr1, SEEK_SET); | |
3999122f | 417 | bfd_bread (sname, (bfd_size_type) sizeof (sname), dll); |
1b6bc7e0 | 418 | |
3999122f PM |
419 | if ((strcmp (sname, ".edata") == 0) |
420 | || (vaddr <= export_opthdrrva && export_opthdrrva < vaddr + vsize)) | |
1b6bc7e0 | 421 | { |
3999122f PM |
422 | if (strcmp (sname, ".edata") != 0) |
423 | { | |
424 | if (debug_coff_pe_read) | |
425 | fprintf_unfiltered (gdb_stdlog, _("Export RVA for dll " | |
426 | "\"%s\" is in section \"%s\"\n"), | |
427 | dll_name, sname); | |
428 | } | |
429 | else if (export_opthdrrva != vaddr && debug_coff_pe_read) | |
430 | fprintf_unfiltered (gdb_stdlog, _("Wrong value of export RVA" | |
431 | " for dll \"%s\": 0x%lx instead of 0x%lx\n"), | |
432 | dll_name, export_opthdrrva, vaddr); | |
433 | expptr = fptr + (export_opthdrrva - vaddr); | |
1b6bc7e0 CF |
434 | break; |
435 | } | |
436 | } | |
437 | ||
3999122f PM |
438 | export_rva = export_opthdrrva; |
439 | export_size = export_opthdrsize; | |
440 | ||
1b6bc7e0 CF |
441 | if (export_size == 0) |
442 | { | |
aff410f1 | 443 | /* Empty export table. */ |
feb14725 | 444 | do_cleanups (back_to); |
1b6bc7e0 CF |
445 | return; |
446 | } | |
447 | ||
aff410f1 MS |
448 | /* Scan sections and store the base and size of the relevant |
449 | sections. */ | |
1b6bc7e0 CF |
450 | for (i = 0; i < nsections; i++) |
451 | { | |
452 | unsigned long secptr1 = secptr + 40 * i; | |
453 | unsigned long vsize = pe_get32 (dll, secptr1 + 8); | |
454 | unsigned long vaddr = pe_get32 (dll, secptr1 + 12); | |
3999122f | 455 | unsigned long characteristics = pe_get32 (dll, secptr1 + 36); |
aab2f004 | 456 | char sec_name[SCNNMLEN + 1]; |
1b6bc7e0 CF |
457 | int sectix; |
458 | ||
1b6bc7e0 | 459 | bfd_seek (dll, (file_ptr) secptr1 + 0, SEEK_SET); |
aab2f004 PA |
460 | bfd_bread (sec_name, (bfd_size_type) SCNNMLEN, dll); |
461 | sec_name[SCNNMLEN] = '\0'; | |
1b6bc7e0 CF |
462 | |
463 | sectix = read_pe_section_index (sec_name); | |
464 | ||
465 | if (sectix != PE_SECTION_INDEX_INVALID) | |
466 | { | |
467 | section_data[sectix].rva_start = vaddr; | |
468 | section_data[sectix].rva_end = vaddr + vsize; | |
469 | } | |
3999122f PM |
470 | else |
471 | { | |
472 | char *name; | |
473 | ||
474 | section_data = xrealloc (section_data, (otherix + 1) | |
475 | * sizeof (struct read_pe_section_data)); | |
476 | name = xstrdup (sec_name); | |
477 | section_data[otherix].section_name = name; | |
478 | make_cleanup (xfree, name); | |
479 | section_data[otherix].rva_start = vaddr; | |
480 | section_data[otherix].rva_end = vaddr + vsize; | |
481 | section_data[otherix].vma_offset = 0; | |
482 | if (characteristics & IMAGE_SCN_CNT_CODE) | |
483 | section_data[otherix].ms_type = mst_text; | |
484 | else if (characteristics & IMAGE_SCN_CNT_INITIALIZED_DATA) | |
485 | section_data[otherix].ms_type = mst_data; | |
486 | else if (characteristics & IMAGE_SCN_CNT_UNINITIALIZED_DATA) | |
487 | section_data[otherix].ms_type = mst_bss; | |
488 | else | |
489 | section_data[otherix].ms_type = mst_unknown; | |
490 | otherix++; | |
491 | } | |
1b6bc7e0 CF |
492 | } |
493 | ||
494 | expdata = (unsigned char *) xmalloc (export_size); | |
3999122f | 495 | make_cleanup (xfree, expdata); |
1b6bc7e0 CF |
496 | |
497 | bfd_seek (dll, (file_ptr) expptr, SEEK_SET); | |
498 | bfd_bread (expdata, (bfd_size_type) export_size, dll); | |
499 | erva = expdata - export_rva; | |
500 | ||
501 | nexp = pe_as32 (expdata + 24); | |
502 | name_rvas = pe_as32 (expdata + 32); | |
503 | ordinals = pe_as32 (expdata + 36); | |
504 | ordbase = pe_as32 (expdata + 16); | |
505 | exp_funcbase = pe_as32 (expdata + 28); | |
506 | ||
aff410f1 | 507 | /* Use internal dll name instead of full pathname. */ |
db5be46f | 508 | dll_name = (char *) (pe_as32 (expdata + 12) + erva); |
1b6bc7e0 | 509 | |
3999122f PM |
510 | pe_sections_info.nb_sections = otherix; |
511 | pe_sections_info.sections = section_data; | |
512 | ||
513 | bfd_map_over_sections (dll, get_section_vmas, &pe_sections_info); | |
1b6bc7e0 CF |
514 | |
515 | /* Adjust the vma_offsets in case this PE got relocated. This | |
516 | assumes that *all* sections share the same relocation offset | |
aff410f1 | 517 | as the text section. */ |
3999122f | 518 | for (i = 0; i < otherix; i++) |
1b6bc7e0 CF |
519 | { |
520 | section_data[i].vma_offset | |
521 | += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
522 | } | |
523 | ||
1b6bc7e0 | 524 | /* Truncate name at first dot. Should maybe also convert to all |
aff410f1 | 525 | lower case for convenience on Windows. */ |
1b6bc7e0 CF |
526 | read_pe_truncate_name (dll_name); |
527 | ||
3999122f PM |
528 | if (debug_coff_pe_read) |
529 | fprintf_unfiltered (gdb_stdlog, _("DLL \"%s\" has %ld export entries," | |
530 | " base=%ld\n"), dll_name, nexp, ordbase); | |
531 | nbforward = 0; | |
532 | nbnormal = 0; | |
1b6bc7e0 CF |
533 | /* Iterate through the list of symbols. */ |
534 | for (i = 0; i < nexp; i++) | |
535 | { | |
536 | /* Pointer to the names vector. */ | |
537 | unsigned long name_rva = pe_as32 (erva + name_rvas + i * 4); | |
3999122f PM |
538 | /* Retrieve ordinal value. */ |
539 | ||
540 | unsigned long ordinal = pe_as16 (erva + ordinals + i * 2); | |
541 | ||
1b6bc7e0 CF |
542 | |
543 | /* Pointer to the function address vector. */ | |
3999122f PM |
544 | /* This is relatived to ordinal value. */ |
545 | unsigned long func_rva = pe_as32 (erva + exp_funcbase + | |
546 | ordinal * 4); | |
1b6bc7e0 | 547 | |
aff410f1 | 548 | /* Find this symbol's section in our own array. */ |
1b6bc7e0 | 549 | int sectix = 0; |
3999122f PM |
550 | int section_found = 0; |
551 | ||
552 | /* First handle forward cases. */ | |
553 | if (func_rva >= export_rva && func_rva < export_rva + export_size) | |
554 | { | |
555 | char *forward_name = (char *) (erva + func_rva); | |
556 | char *funcname = (char *) (erva + name_rva); | |
557 | char *forward_dll_name = forward_name; | |
558 | char *forward_func_name = forward_name; | |
559 | char *sep = strrchr (forward_name, '.'); | |
560 | ||
561 | if (sep) | |
562 | { | |
563 | int len = (int) (sep - forward_name); | |
1b6bc7e0 | 564 | |
3999122f PM |
565 | forward_dll_name = alloca (len + 1); |
566 | strncpy (forward_dll_name, forward_name, len); | |
567 | forward_dll_name[len] = '\0'; | |
568 | forward_func_name = ++sep; | |
569 | } | |
570 | if (add_pe_forwarded_sym (funcname, forward_dll_name, | |
571 | forward_func_name, ordinal, | |
572 | dll_name, objfile) != 0) | |
573 | ++nbforward; | |
574 | continue; | |
575 | } | |
576 | ||
577 | for (sectix = 0; sectix < otherix; ++sectix) | |
1b6bc7e0 CF |
578 | { |
579 | if ((func_rva >= section_data[sectix].rva_start) | |
580 | && (func_rva < section_data[sectix].rva_end)) | |
581 | { | |
db5be46f PA |
582 | char *sym_name = (char *) (erva + name_rva); |
583 | ||
3999122f | 584 | section_found = 1; |
db5be46f | 585 | add_pe_exported_sym (sym_name, func_rva, ordinal, |
1b6bc7e0 | 586 | section_data + sectix, dll_name, objfile); |
3999122f | 587 | ++nbnormal; |
1b6bc7e0 CF |
588 | break; |
589 | } | |
590 | } | |
3999122f PM |
591 | if (!section_found) |
592 | { | |
593 | char *funcname = (char *) (erva + name_rva); | |
594 | ||
595 | if (name_rva == 0) | |
596 | { | |
597 | add_pe_exported_sym (NULL, func_rva, ordinal, | |
598 | section_data, dll_name, objfile); | |
599 | ++nbnormal; | |
600 | } | |
601 | else if (debug_coff_pe_read) | |
602 | fprintf_unfiltered (gdb_stdlog, _("Export name \"%s\" ord. %lu," | |
603 | " RVA 0x%lx in dll \"%s\" not handled\n"), | |
604 | funcname, ordinal, func_rva, dll_name); | |
605 | } | |
1b6bc7e0 CF |
606 | } |
607 | ||
3999122f PM |
608 | if (debug_coff_pe_read) |
609 | fprintf_unfiltered (gdb_stdlog, _("Finished reading \"%s\", exports %ld," | |
610 | " forwards %ld, total %ld/%ld.\n"), dll_name, nbnormal, | |
611 | nbforward, nbnormal + nbforward, nexp); | |
612 | /* Discard expdata and section_data. */ | |
1b6bc7e0 CF |
613 | do_cleanups (back_to); |
614 | } | |
3999122f PM |
615 | |
616 | /* Extract from ABFD the offset of the .text section. | |
617 | This offset is mainly related to the offset within the file. | |
618 | The value was previously expected to be 0x1000 for all files, | |
619 | but some Windows OS core DLLs seem to use 0x10000 section alignement | |
620 | which modified the return value of that function. | |
621 | Still return default 0x1000 value if ABFD is NULL or | |
622 | if '.text' section is not found, but that should not happen... */ | |
623 | ||
624 | #define DEFAULT_COFF_PE_TEXT_SECTION_OFFSET 0x1000 | |
625 | ||
626 | CORE_ADDR | |
627 | pe_text_section_offset (struct bfd *abfd) | |
628 | ||
629 | { | |
cebca8c1 AR |
630 | unsigned long pe_header_offset, i; |
631 | unsigned long nsections, secptr; | |
3999122f PM |
632 | int is_pe64 = 0; |
633 | int is_pe32 = 0; | |
634 | char const *target; | |
635 | ||
636 | if (!abfd) | |
637 | return DEFAULT_COFF_PE_TEXT_SECTION_OFFSET; | |
638 | ||
639 | target = bfd_get_target (abfd); | |
640 | ||
641 | is_pe64 = (strcmp (target, "pe-x86-64") == 0 | |
642 | || strcmp (target, "pei-x86-64") == 0); | |
643 | is_pe32 = (strcmp (target, "pe-i386") == 0 | |
644 | || strcmp (target, "pei-i386") == 0 | |
645 | || strcmp (target, "pe-arm-wince-little") == 0 | |
646 | || strcmp (target, "pei-arm-wince-little") == 0); | |
647 | ||
648 | if (!is_pe32 && !is_pe64) | |
649 | { | |
650 | /* This is not a recognized PE format file. Abort now, because | |
651 | the code is untested on anything else. *FIXME* test on | |
652 | further architectures and loosen or remove this test. */ | |
653 | return DEFAULT_COFF_PE_TEXT_SECTION_OFFSET; | |
654 | } | |
655 | ||
656 | /* Get pe_header, optional header and numbers of sections. */ | |
657 | pe_header_offset = pe_get32 (abfd, 0x3c); | |
3999122f PM |
658 | nsections = pe_get16 (abfd, pe_header_offset + 4 + 2); |
659 | secptr = (pe_header_offset + 4 + 20 + | |
660 | pe_get16 (abfd, pe_header_offset + 4 + 16)); | |
661 | ||
662 | /* Get the rva and size of the export section. */ | |
663 | for (i = 0; i < nsections; i++) | |
664 | { | |
d8f4a83e | 665 | char sname[SCNNMLEN + 1]; |
3999122f PM |
666 | unsigned long secptr1 = secptr + 40 * i; |
667 | unsigned long vaddr = pe_get32 (abfd, secptr1 + 12); | |
668 | ||
669 | bfd_seek (abfd, (file_ptr) secptr1, SEEK_SET); | |
d8f4a83e PM |
670 | bfd_bread (sname, (bfd_size_type) SCNNMLEN, abfd); |
671 | sname[SCNNMLEN] = '\0'; | |
3999122f PM |
672 | if (strcmp (sname, ".text") == 0) |
673 | return vaddr; | |
674 | } | |
675 | ||
676 | return DEFAULT_COFF_PE_TEXT_SECTION_OFFSET; | |
677 | } | |
678 | ||
679 | /* Implements "show debug coff_pe_read" command. */ | |
680 | ||
681 | static void | |
682 | show_debug_coff_pe_read (struct ui_file *file, int from_tty, | |
683 | struct cmd_list_element *c, const char *value) | |
684 | { | |
685 | fprintf_filtered (file, _("Coff PE read debugging is %s.\n"), value); | |
686 | } | |
687 | ||
688 | /* Provide a prototype to silence -Wmissing-prototypes. */ | |
689 | ||
690 | void _initialize_coff_pe_read (void); | |
691 | ||
692 | /* Adds "Set/show debug coff_pe_read" commands. */ | |
693 | ||
694 | void | |
695 | _initialize_coff_pe_read (void) | |
696 | { | |
826ecc4d | 697 | add_setshow_zuinteger_cmd ("coff-pe-read", class_maintenance, |
b75bf488 PA |
698 | &debug_coff_pe_read, |
699 | _("Set coff PE read debugging."), | |
700 | _("Show coff PE read debugging."), | |
701 | _("When set, debugging messages for coff reading " | |
702 | "of exported symbols are displayed."), | |
703 | NULL, show_debug_coff_pe_read, | |
704 | &setdebuglist, &showdebuglist); | |
3999122f | 705 | } |