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 | ||
ecd75fc8 | 5 | Copyright (C) 2003-2014 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. */ | |
f93ba80c | 56 | unsigned int index; /* BFD section number. */ |
3999122f | 57 | char *section_name; /* Recorded section name. */ |
1b6bc7e0 CF |
58 | }; |
59 | ||
78ea0eca PM |
60 | #define IMAGE_SCN_CNT_CODE 0x20 |
61 | #define IMAGE_SCN_CNT_INITIALIZED_DATA 0x40 | |
62 | #define IMAGE_SCN_CNT_UNINITIALIZED_DATA 0x80 | |
1b6bc7e0 CF |
63 | #define PE_SECTION_INDEX_TEXT 0 |
64 | #define PE_SECTION_INDEX_DATA 1 | |
65 | #define PE_SECTION_INDEX_BSS 2 | |
66 | #define PE_SECTION_TABLE_SIZE 3 | |
67 | #define PE_SECTION_INDEX_INVALID -1 | |
68 | \f | |
69 | /* Get the index of the named section in our own array, which contains | |
aff410f1 MS |
70 | text, data and bss in that order. Return PE_SECTION_INDEX_INVALID |
71 | if passed an unrecognised section name. */ | |
1b6bc7e0 CF |
72 | |
73 | static int | |
74 | read_pe_section_index (const char *section_name) | |
75 | { | |
76 | if (strcmp (section_name, ".text") == 0) | |
77 | { | |
78 | return PE_SECTION_INDEX_TEXT; | |
79 | } | |
80 | ||
81 | else if (strcmp (section_name, ".data") == 0) | |
82 | { | |
83 | return PE_SECTION_INDEX_DATA; | |
84 | } | |
85 | ||
86 | else if (strcmp (section_name, ".bss") == 0) | |
87 | { | |
88 | return PE_SECTION_INDEX_BSS; | |
89 | } | |
90 | ||
91 | else | |
92 | { | |
93 | return PE_SECTION_INDEX_INVALID; | |
94 | } | |
95 | } | |
96 | ||
f93ba80c | 97 | /* Get the index of the named section in our own full array. |
3999122f PM |
98 | text, data and bss in that order. Return PE_SECTION_INDEX_INVALID |
99 | if passed an unrecognised section name. */ | |
100 | ||
101 | static int | |
102 | get_pe_section_index (const char *section_name, | |
103 | struct read_pe_section_data *sections, | |
104 | int nb_sections) | |
105 | { | |
106 | int i; | |
107 | ||
108 | for (i = 0; i < nb_sections; i++) | |
109 | if (strcmp (sections[i].section_name, section_name) == 0) | |
110 | return i; | |
111 | return PE_SECTION_INDEX_INVALID; | |
112 | } | |
113 | ||
114 | /* Structure used by get_section_vmas function below | |
115 | to access section_data array and the size of the array | |
116 | stored in nb_sections field. */ | |
117 | struct pe_sections_info | |
118 | { | |
119 | int nb_sections; | |
120 | struct read_pe_section_data *sections; | |
121 | }; | |
122 | ||
aff410f1 | 123 | /* Record the virtual memory address of a section. */ |
1b6bc7e0 CF |
124 | |
125 | static void | |
126 | get_section_vmas (bfd *abfd, asection *sectp, void *context) | |
127 | { | |
3999122f PM |
128 | struct pe_sections_info *data = context; |
129 | struct read_pe_section_data *sections = data->sections; | |
130 | int sectix = get_pe_section_index (sectp->name, sections, | |
131 | data->nb_sections); | |
1b6bc7e0 CF |
132 | |
133 | if (sectix != PE_SECTION_INDEX_INVALID) | |
134 | { | |
135 | /* Data within the section start at rva_start in the pe and at | |
aff410f1 | 136 | bfd_get_section_vma() within memory. Store the offset. */ |
1b6bc7e0 CF |
137 | |
138 | sections[sectix].vma_offset | |
139 | = bfd_get_section_vma (abfd, sectp) - sections[sectix].rva_start; | |
140 | } | |
141 | } | |
142 | \f | |
3999122f PM |
143 | /* Create a minimal symbol entry for an exported symbol. |
144 | SYM_NAME contains the exported name or NULL if exported by ordinal, | |
145 | FUNC_RVA contains the Relative Virtual Address of the symbol, | |
146 | ORDINAL is the ordinal index value of the symbol, | |
147 | SECTION_DATA contains information about the section in which the | |
148 | symbol is declared, | |
149 | DLL_NAME is the internal name of the DLL file, | |
150 | OBJFILE is the objfile struct of DLL_NAME. */ | |
1b6bc7e0 CF |
151 | |
152 | static void | |
3999122f | 153 | add_pe_exported_sym (const char *sym_name, |
1b6bc7e0 | 154 | unsigned long func_rva, |
3999122f | 155 | int ordinal, |
1b6bc7e0 CF |
156 | const struct read_pe_section_data *section_data, |
157 | const char *dll_name, struct objfile *objfile) | |
158 | { | |
3999122f | 159 | char *qualified_name, *bare_name; |
aff410f1 | 160 | /* Add the stored offset to get the loaded address of the symbol. */ |
1b6bc7e0 | 161 | CORE_ADDR vma = func_rva + section_data->vma_offset; |
1b6bc7e0 CF |
162 | |
163 | /* Generate a (hopefully unique) qualified name using the first part | |
aff410f1 MS |
164 | of the dll name, e.g. KERNEL32!AddAtomA. This matches the style |
165 | used by windbg from the "Microsoft Debugging Tools for Windows". */ | |
1b6bc7e0 | 166 | |
3999122f PM |
167 | if (sym_name == NULL || *sym_name == '\0') |
168 | bare_name = xstrprintf ("#%d", ordinal); | |
169 | else | |
170 | bare_name = xstrdup (sym_name); | |
171 | ||
172 | qualified_name = xstrprintf ("%s!%s", dll_name, bare_name); | |
1b6bc7e0 | 173 | |
3999122f PM |
174 | if ((section_data->ms_type == mst_unknown) && debug_coff_pe_read) |
175 | fprintf_unfiltered (gdb_stdlog , _("Unknown section type for \"%s\"" | |
176 | " for entry \"%s\" in dll \"%s\"\n"), | |
177 | section_data->section_name, sym_name, dll_name); | |
1b6bc7e0 | 178 | |
f93ba80c PM |
179 | prim_record_minimal_symbol_and_info (qualified_name, vma, |
180 | section_data->ms_type, | |
181 | section_data->index, objfile); | |
1b6bc7e0 | 182 | |
3999122f | 183 | /* Enter the plain name as well, which might not be unique. */ |
f93ba80c PM |
184 | prim_record_minimal_symbol_and_info (bare_name, vma, section_data->ms_type, |
185 | section_data->index, objfile); | |
3999122f PM |
186 | if (debug_coff_pe_read > 1) |
187 | fprintf_unfiltered (gdb_stdlog, _("Adding exported symbol \"%s\"" | |
188 | " in dll \"%s\"\n"), sym_name, dll_name); | |
1b6bc7e0 | 189 | xfree (qualified_name); |
3999122f PM |
190 | xfree (bare_name); |
191 | } | |
192 | ||
193 | /* Create a minimal symbol entry for an exported forward symbol. | |
194 | Return 1 if the forwarded function was found 0 otherwise. | |
195 | SYM_NAME contains the exported name or NULL if exported by ordinal, | |
196 | FORWARD_DLL_NAME is the name of the DLL in which the target symobl resides, | |
197 | FORWARD_FUNC_NAME is the name of the target symbol in that DLL, | |
198 | ORDINAL is the ordinal index value of the symbol, | |
199 | DLL_NAME is the internal name of the DLL file, | |
200 | OBJFILE is the objfile struct of DLL_NAME. */ | |
201 | ||
202 | static int | |
203 | add_pe_forwarded_sym (const char *sym_name, const char *forward_dll_name, | |
204 | const char *forward_func_name, int ordinal, | |
205 | const char *dll_name, struct objfile *objfile) | |
206 | { | |
207 | CORE_ADDR vma; | |
7cbd4a93 | 208 | struct bound_minimal_symbol msymbol; |
3999122f | 209 | enum minimal_symbol_type msymtype; |
3999122f PM |
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); | |
f93ba80c | 215 | short section; |
3999122f PM |
216 | |
217 | xsnprintf (forward_qualified_name, forward_len, "%s!%s", forward_dll_name, | |
218 | forward_func_name); | |
219 | ||
220 | ||
7cbd4a93 | 221 | msymbol = lookup_minimal_symbol_and_objfile (forward_qualified_name); |
3999122f | 222 | |
7cbd4a93 | 223 | if (!msymbol.minsym) |
3999122f PM |
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]); | |
7cbd4a93 | 229 | msymbol = lookup_minimal_symbol_and_objfile (forward_qualified_name); |
3999122f PM |
230 | } |
231 | ||
7cbd4a93 | 232 | if (!msymbol.minsym) |
3999122f PM |
233 | { |
234 | if (debug_coff_pe_read) | |
235 | fprintf_unfiltered (gdb_stdlog, _("Unable to find function \"%s\" in" | |
236 | " dll \"%s\", forward of \"%s\" in dll \"%s\"\n"), | |
237 | forward_func_name, forward_dll_name, sym_name, | |
238 | dll_name); | |
239 | return 0; | |
240 | } | |
241 | ||
242 | if (debug_coff_pe_read > 1) | |
243 | fprintf_unfiltered (gdb_stdlog, _("Adding forwarded exported symbol" | |
244 | " \"%s\" in dll \"%s\", pointing to \"%s\"\n"), | |
245 | sym_name, dll_name, forward_qualified_name); | |
246 | ||
7cbd4a93 TT |
247 | vma = SYMBOL_VALUE_ADDRESS (msymbol.minsym); |
248 | msymtype = MSYMBOL_TYPE (msymbol.minsym); | |
f93ba80c | 249 | section = SYMBOL_SECTION (msymbol.minsym); |
3999122f PM |
250 | |
251 | /* Generate a (hopefully unique) qualified name using the first part | |
252 | of the dll name, e.g. KERNEL32!AddAtomA. This matches the style | |
253 | used by windbg from the "Microsoft Debugging Tools for Windows". */ | |
254 | ||
255 | if (sym_name == NULL || *sym_name == '\0') | |
256 | bare_name = xstrprintf ("#%d", ordinal); | |
257 | else | |
258 | bare_name = xstrdup (sym_name); | |
259 | ||
260 | qualified_name = xstrprintf ("%s!%s", dll_name, bare_name); | |
261 | ||
f93ba80c PM |
262 | prim_record_minimal_symbol_and_info (qualified_name, vma, msymtype, |
263 | section, objfile); | |
1b6bc7e0 | 264 | |
aff410f1 | 265 | /* Enter the plain name as well, which might not be unique. */ |
f93ba80c PM |
266 | prim_record_minimal_symbol_and_info (bare_name, vma, msymtype, |
267 | section, objfile); | |
3999122f PM |
268 | xfree (qualified_name); |
269 | xfree (bare_name); | |
270 | ||
271 | return 1; | |
1b6bc7e0 CF |
272 | } |
273 | ||
3999122f | 274 | /* Truncate a dll_name at the last dot character. */ |
1b6bc7e0 CF |
275 | |
276 | static void | |
277 | read_pe_truncate_name (char *dll_name) | |
278 | { | |
3999122f | 279 | char *last_point = strrchr (dll_name, '.'); |
1b6bc7e0 | 280 | |
3999122f PM |
281 | if (last_point != NULL) |
282 | *last_point = '\0'; | |
1b6bc7e0 CF |
283 | } |
284 | \f | |
aff410f1 | 285 | /* Low-level support functions, direct from the ld module pe-dll.c. */ |
1b6bc7e0 CF |
286 | static unsigned int |
287 | pe_get16 (bfd *abfd, int where) | |
288 | { | |
289 | unsigned char b[2]; | |
290 | ||
291 | bfd_seek (abfd, (file_ptr) where, SEEK_SET); | |
292 | bfd_bread (b, (bfd_size_type) 2, abfd); | |
293 | return b[0] + (b[1] << 8); | |
294 | } | |
295 | ||
296 | static unsigned int | |
297 | pe_get32 (bfd *abfd, int where) | |
298 | { | |
299 | unsigned char b[4]; | |
300 | ||
301 | bfd_seek (abfd, (file_ptr) where, SEEK_SET); | |
302 | bfd_bread (b, (bfd_size_type) 4, abfd); | |
303 | return b[0] + (b[1] << 8) + (b[2] << 16) + (b[3] << 24); | |
304 | } | |
305 | ||
3999122f PM |
306 | static unsigned int |
307 | pe_as16 (void *ptr) | |
308 | { | |
309 | unsigned char *b = ptr; | |
310 | ||
311 | return b[0] + (b[1] << 8); | |
312 | } | |
313 | ||
1b6bc7e0 CF |
314 | static unsigned int |
315 | pe_as32 (void *ptr) | |
316 | { | |
317 | unsigned char *b = ptr; | |
318 | ||
319 | return b[0] + (b[1] << 8) + (b[2] << 16) + (b[3] << 24); | |
320 | } | |
321 | \f | |
322 | /* Read the (non-debug) export symbol table from a portable | |
aff410f1 MS |
323 | executable. Code originally lifted from the ld function |
324 | pe_implied_import_dll in pe-dll.c. */ | |
1b6bc7e0 CF |
325 | |
326 | void | |
327 | read_pe_exported_syms (struct objfile *objfile) | |
328 | { | |
329 | bfd *dll = objfile->obfd; | |
3999122f | 330 | unsigned long nbnormal, nbforward; |
1b6bc7e0 | 331 | unsigned long pe_header_offset, opthdr_ofs, num_entries, i; |
3999122f | 332 | unsigned long export_opthdrrva, export_opthdrsize; |
1b6bc7e0 CF |
333 | unsigned long export_rva, export_size, nsections, secptr, expptr; |
334 | unsigned long exp_funcbase; | |
335 | unsigned char *expdata, *erva; | |
336 | unsigned long name_rvas, ordinals, nexp, ordbase; | |
3999122f PM |
337 | char *dll_name = (char *) dll->filename; |
338 | int otherix = PE_SECTION_TABLE_SIZE; | |
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. */ |
feb14725 | 381 | do_cleanups (back_to); |
1b6bc7e0 CF |
382 | return; |
383 | } | |
384 | ||
385 | /* Get pe_header, optional header and numbers of export entries. */ | |
386 | pe_header_offset = pe_get32 (dll, 0x3c); | |
387 | opthdr_ofs = pe_header_offset + 4 + 20; | |
a68ddad5 | 388 | if (is_pe64) |
1dac1b47 | 389 | num_entries = pe_get32 (dll, opthdr_ofs + 108); |
a68ddad5 KT |
390 | else |
391 | num_entries = pe_get32 (dll, opthdr_ofs + 92); | |
1b6bc7e0 CF |
392 | |
393 | if (num_entries < 1) /* No exports. */ | |
394 | { | |
feb14725 | 395 | do_cleanups (back_to); |
1b6bc7e0 CF |
396 | return; |
397 | } | |
a68ddad5 KT |
398 | if (is_pe64) |
399 | { | |
3999122f PM |
400 | export_opthdrrva = pe_get32 (dll, opthdr_ofs + 112); |
401 | export_opthdrsize = pe_get32 (dll, opthdr_ofs + 116); | |
a68ddad5 KT |
402 | } |
403 | else | |
404 | { | |
3999122f PM |
405 | export_opthdrrva = pe_get32 (dll, opthdr_ofs + 96); |
406 | export_opthdrsize = pe_get32 (dll, opthdr_ofs + 100); | |
a68ddad5 | 407 | } |
1b6bc7e0 CF |
408 | nsections = pe_get16 (dll, pe_header_offset + 4 + 2); |
409 | secptr = (pe_header_offset + 4 + 20 + | |
410 | pe_get16 (dll, pe_header_offset + 4 + 16)); | |
411 | expptr = 0; | |
3999122f | 412 | export_size = 0; |
1b6bc7e0 CF |
413 | |
414 | /* Get the rva and size of the export section. */ | |
415 | for (i = 0; i < nsections; i++) | |
416 | { | |
417 | char sname[8]; | |
418 | unsigned long secptr1 = secptr + 40 * i; | |
419 | unsigned long vaddr = pe_get32 (dll, secptr1 + 12); | |
420 | unsigned long vsize = pe_get32 (dll, secptr1 + 16); | |
421 | unsigned long fptr = pe_get32 (dll, secptr1 + 20); | |
422 | ||
423 | bfd_seek (dll, (file_ptr) secptr1, SEEK_SET); | |
3999122f | 424 | bfd_bread (sname, (bfd_size_type) sizeof (sname), dll); |
1b6bc7e0 | 425 | |
3999122f PM |
426 | if ((strcmp (sname, ".edata") == 0) |
427 | || (vaddr <= export_opthdrrva && export_opthdrrva < vaddr + vsize)) | |
1b6bc7e0 | 428 | { |
3999122f PM |
429 | if (strcmp (sname, ".edata") != 0) |
430 | { | |
431 | if (debug_coff_pe_read) | |
432 | fprintf_unfiltered (gdb_stdlog, _("Export RVA for dll " | |
433 | "\"%s\" is in section \"%s\"\n"), | |
434 | dll_name, sname); | |
435 | } | |
436 | else if (export_opthdrrva != vaddr && debug_coff_pe_read) | |
437 | fprintf_unfiltered (gdb_stdlog, _("Wrong value of export RVA" | |
438 | " for dll \"%s\": 0x%lx instead of 0x%lx\n"), | |
439 | dll_name, export_opthdrrva, vaddr); | |
440 | expptr = fptr + (export_opthdrrva - vaddr); | |
1b6bc7e0 CF |
441 | break; |
442 | } | |
443 | } | |
444 | ||
3999122f PM |
445 | export_rva = export_opthdrrva; |
446 | export_size = export_opthdrsize; | |
447 | ||
1b6bc7e0 CF |
448 | if (export_size == 0) |
449 | { | |
aff410f1 | 450 | /* Empty export table. */ |
feb14725 | 451 | do_cleanups (back_to); |
1b6bc7e0 CF |
452 | return; |
453 | } | |
454 | ||
aff410f1 MS |
455 | /* Scan sections and store the base and size of the relevant |
456 | sections. */ | |
1b6bc7e0 CF |
457 | for (i = 0; i < nsections; i++) |
458 | { | |
459 | unsigned long secptr1 = secptr + 40 * i; | |
460 | unsigned long vsize = pe_get32 (dll, secptr1 + 8); | |
461 | unsigned long vaddr = pe_get32 (dll, secptr1 + 12); | |
3999122f | 462 | unsigned long characteristics = pe_get32 (dll, secptr1 + 36); |
aab2f004 | 463 | char sec_name[SCNNMLEN + 1]; |
1b6bc7e0 | 464 | int sectix; |
f93ba80c PM |
465 | unsigned int bfd_section_index; |
466 | asection *section; | |
1b6bc7e0 | 467 | |
1b6bc7e0 | 468 | bfd_seek (dll, (file_ptr) secptr1 + 0, SEEK_SET); |
aab2f004 PA |
469 | bfd_bread (sec_name, (bfd_size_type) SCNNMLEN, dll); |
470 | sec_name[SCNNMLEN] = '\0'; | |
1b6bc7e0 CF |
471 | |
472 | sectix = read_pe_section_index (sec_name); | |
f93ba80c PM |
473 | section = bfd_get_section_by_name (dll, sec_name); |
474 | if (section) | |
475 | bfd_section_index = section->index; | |
476 | else | |
477 | bfd_section_index = -1; | |
1b6bc7e0 CF |
478 | |
479 | if (sectix != PE_SECTION_INDEX_INVALID) | |
480 | { | |
481 | section_data[sectix].rva_start = vaddr; | |
482 | section_data[sectix].rva_end = vaddr + vsize; | |
f93ba80c | 483 | section_data[sectix].index = bfd_section_index; |
1b6bc7e0 | 484 | } |
3999122f PM |
485 | else |
486 | { | |
487 | char *name; | |
488 | ||
489 | section_data = xrealloc (section_data, (otherix + 1) | |
490 | * sizeof (struct read_pe_section_data)); | |
491 | name = xstrdup (sec_name); | |
492 | section_data[otherix].section_name = name; | |
493 | make_cleanup (xfree, name); | |
494 | section_data[otherix].rva_start = vaddr; | |
495 | section_data[otherix].rva_end = vaddr + vsize; | |
496 | section_data[otherix].vma_offset = 0; | |
f93ba80c | 497 | section_data[otherix].index = bfd_section_index; |
3999122f PM |
498 | if (characteristics & IMAGE_SCN_CNT_CODE) |
499 | section_data[otherix].ms_type = mst_text; | |
500 | else if (characteristics & IMAGE_SCN_CNT_INITIALIZED_DATA) | |
501 | section_data[otherix].ms_type = mst_data; | |
502 | else if (characteristics & IMAGE_SCN_CNT_UNINITIALIZED_DATA) | |
503 | section_data[otherix].ms_type = mst_bss; | |
504 | else | |
505 | section_data[otherix].ms_type = mst_unknown; | |
506 | otherix++; | |
507 | } | |
1b6bc7e0 CF |
508 | } |
509 | ||
510 | expdata = (unsigned char *) xmalloc (export_size); | |
3999122f | 511 | make_cleanup (xfree, expdata); |
1b6bc7e0 CF |
512 | |
513 | bfd_seek (dll, (file_ptr) expptr, SEEK_SET); | |
514 | bfd_bread (expdata, (bfd_size_type) export_size, dll); | |
515 | erva = expdata - export_rva; | |
516 | ||
517 | nexp = pe_as32 (expdata + 24); | |
518 | name_rvas = pe_as32 (expdata + 32); | |
519 | ordinals = pe_as32 (expdata + 36); | |
520 | ordbase = pe_as32 (expdata + 16); | |
521 | exp_funcbase = pe_as32 (expdata + 28); | |
522 | ||
aff410f1 | 523 | /* Use internal dll name instead of full pathname. */ |
db5be46f | 524 | dll_name = (char *) (pe_as32 (expdata + 12) + erva); |
1b6bc7e0 | 525 | |
3999122f PM |
526 | pe_sections_info.nb_sections = otherix; |
527 | pe_sections_info.sections = section_data; | |
528 | ||
529 | bfd_map_over_sections (dll, get_section_vmas, &pe_sections_info); | |
1b6bc7e0 CF |
530 | |
531 | /* Adjust the vma_offsets in case this PE got relocated. This | |
532 | assumes that *all* sections share the same relocation offset | |
aff410f1 | 533 | as the text section. */ |
3999122f | 534 | for (i = 0; i < otherix; i++) |
1b6bc7e0 CF |
535 | { |
536 | section_data[i].vma_offset | |
537 | += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
538 | } | |
539 | ||
1b6bc7e0 | 540 | /* Truncate name at first dot. Should maybe also convert to all |
aff410f1 | 541 | lower case for convenience on Windows. */ |
1b6bc7e0 CF |
542 | read_pe_truncate_name (dll_name); |
543 | ||
3999122f PM |
544 | if (debug_coff_pe_read) |
545 | fprintf_unfiltered (gdb_stdlog, _("DLL \"%s\" has %ld export entries," | |
546 | " base=%ld\n"), dll_name, nexp, ordbase); | |
547 | nbforward = 0; | |
548 | nbnormal = 0; | |
1b6bc7e0 CF |
549 | /* Iterate through the list of symbols. */ |
550 | for (i = 0; i < nexp; i++) | |
551 | { | |
552 | /* Pointer to the names vector. */ | |
553 | unsigned long name_rva = pe_as32 (erva + name_rvas + i * 4); | |
3999122f PM |
554 | /* Retrieve ordinal value. */ |
555 | ||
556 | unsigned long ordinal = pe_as16 (erva + ordinals + i * 2); | |
557 | ||
1b6bc7e0 CF |
558 | |
559 | /* Pointer to the function address vector. */ | |
3999122f PM |
560 | /* This is relatived to ordinal value. */ |
561 | unsigned long func_rva = pe_as32 (erva + exp_funcbase + | |
562 | ordinal * 4); | |
1b6bc7e0 | 563 | |
aff410f1 | 564 | /* Find this symbol's section in our own array. */ |
1b6bc7e0 | 565 | int sectix = 0; |
3999122f PM |
566 | int section_found = 0; |
567 | ||
568 | /* First handle forward cases. */ | |
569 | if (func_rva >= export_rva && func_rva < export_rva + export_size) | |
570 | { | |
571 | char *forward_name = (char *) (erva + func_rva); | |
572 | char *funcname = (char *) (erva + name_rva); | |
573 | char *forward_dll_name = forward_name; | |
574 | char *forward_func_name = forward_name; | |
575 | char *sep = strrchr (forward_name, '.'); | |
576 | ||
577 | if (sep) | |
578 | { | |
579 | int len = (int) (sep - forward_name); | |
1b6bc7e0 | 580 | |
3999122f PM |
581 | forward_dll_name = alloca (len + 1); |
582 | strncpy (forward_dll_name, forward_name, len); | |
583 | forward_dll_name[len] = '\0'; | |
584 | forward_func_name = ++sep; | |
585 | } | |
586 | if (add_pe_forwarded_sym (funcname, forward_dll_name, | |
587 | forward_func_name, ordinal, | |
588 | dll_name, objfile) != 0) | |
589 | ++nbforward; | |
590 | continue; | |
591 | } | |
592 | ||
593 | for (sectix = 0; sectix < otherix; ++sectix) | |
1b6bc7e0 CF |
594 | { |
595 | if ((func_rva >= section_data[sectix].rva_start) | |
596 | && (func_rva < section_data[sectix].rva_end)) | |
597 | { | |
db5be46f PA |
598 | char *sym_name = (char *) (erva + name_rva); |
599 | ||
3999122f | 600 | section_found = 1; |
db5be46f | 601 | add_pe_exported_sym (sym_name, func_rva, ordinal, |
1b6bc7e0 | 602 | section_data + sectix, dll_name, objfile); |
3999122f | 603 | ++nbnormal; |
1b6bc7e0 CF |
604 | break; |
605 | } | |
606 | } | |
3999122f PM |
607 | if (!section_found) |
608 | { | |
609 | char *funcname = (char *) (erva + name_rva); | |
610 | ||
611 | if (name_rva == 0) | |
612 | { | |
613 | add_pe_exported_sym (NULL, func_rva, ordinal, | |
614 | section_data, dll_name, objfile); | |
615 | ++nbnormal; | |
616 | } | |
617 | else if (debug_coff_pe_read) | |
618 | fprintf_unfiltered (gdb_stdlog, _("Export name \"%s\" ord. %lu," | |
619 | " RVA 0x%lx in dll \"%s\" not handled\n"), | |
620 | funcname, ordinal, func_rva, dll_name); | |
621 | } | |
1b6bc7e0 CF |
622 | } |
623 | ||
3999122f PM |
624 | if (debug_coff_pe_read) |
625 | fprintf_unfiltered (gdb_stdlog, _("Finished reading \"%s\", exports %ld," | |
626 | " forwards %ld, total %ld/%ld.\n"), dll_name, nbnormal, | |
627 | nbforward, nbnormal + nbforward, nexp); | |
628 | /* Discard expdata and section_data. */ | |
1b6bc7e0 CF |
629 | do_cleanups (back_to); |
630 | } | |
3999122f PM |
631 | |
632 | /* Extract from ABFD the offset of the .text section. | |
633 | This offset is mainly related to the offset within the file. | |
634 | The value was previously expected to be 0x1000 for all files, | |
635 | but some Windows OS core DLLs seem to use 0x10000 section alignement | |
636 | which modified the return value of that function. | |
637 | Still return default 0x1000 value if ABFD is NULL or | |
638 | if '.text' section is not found, but that should not happen... */ | |
639 | ||
640 | #define DEFAULT_COFF_PE_TEXT_SECTION_OFFSET 0x1000 | |
641 | ||
642 | CORE_ADDR | |
643 | pe_text_section_offset (struct bfd *abfd) | |
644 | ||
645 | { | |
cebca8c1 AR |
646 | unsigned long pe_header_offset, i; |
647 | unsigned long nsections, secptr; | |
3999122f PM |
648 | int is_pe64 = 0; |
649 | int is_pe32 = 0; | |
650 | char const *target; | |
651 | ||
652 | if (!abfd) | |
653 | return DEFAULT_COFF_PE_TEXT_SECTION_OFFSET; | |
654 | ||
655 | target = bfd_get_target (abfd); | |
656 | ||
657 | is_pe64 = (strcmp (target, "pe-x86-64") == 0 | |
658 | || strcmp (target, "pei-x86-64") == 0); | |
659 | is_pe32 = (strcmp (target, "pe-i386") == 0 | |
660 | || strcmp (target, "pei-i386") == 0 | |
661 | || strcmp (target, "pe-arm-wince-little") == 0 | |
662 | || strcmp (target, "pei-arm-wince-little") == 0); | |
663 | ||
664 | if (!is_pe32 && !is_pe64) | |
665 | { | |
666 | /* This is not a recognized PE format file. Abort now, because | |
667 | the code is untested on anything else. *FIXME* test on | |
668 | further architectures and loosen or remove this test. */ | |
669 | return DEFAULT_COFF_PE_TEXT_SECTION_OFFSET; | |
670 | } | |
671 | ||
672 | /* Get pe_header, optional header and numbers of sections. */ | |
673 | pe_header_offset = pe_get32 (abfd, 0x3c); | |
3999122f PM |
674 | nsections = pe_get16 (abfd, pe_header_offset + 4 + 2); |
675 | secptr = (pe_header_offset + 4 + 20 + | |
676 | pe_get16 (abfd, pe_header_offset + 4 + 16)); | |
677 | ||
678 | /* Get the rva and size of the export section. */ | |
679 | for (i = 0; i < nsections; i++) | |
680 | { | |
d8f4a83e | 681 | char sname[SCNNMLEN + 1]; |
3999122f PM |
682 | unsigned long secptr1 = secptr + 40 * i; |
683 | unsigned long vaddr = pe_get32 (abfd, secptr1 + 12); | |
684 | ||
685 | bfd_seek (abfd, (file_ptr) secptr1, SEEK_SET); | |
d8f4a83e PM |
686 | bfd_bread (sname, (bfd_size_type) SCNNMLEN, abfd); |
687 | sname[SCNNMLEN] = '\0'; | |
3999122f PM |
688 | if (strcmp (sname, ".text") == 0) |
689 | return vaddr; | |
690 | } | |
691 | ||
692 | return DEFAULT_COFF_PE_TEXT_SECTION_OFFSET; | |
693 | } | |
694 | ||
695 | /* Implements "show debug coff_pe_read" command. */ | |
696 | ||
697 | static void | |
698 | show_debug_coff_pe_read (struct ui_file *file, int from_tty, | |
699 | struct cmd_list_element *c, const char *value) | |
700 | { | |
701 | fprintf_filtered (file, _("Coff PE read debugging is %s.\n"), value); | |
702 | } | |
703 | ||
704 | /* Provide a prototype to silence -Wmissing-prototypes. */ | |
705 | ||
706 | void _initialize_coff_pe_read (void); | |
707 | ||
708 | /* Adds "Set/show debug coff_pe_read" commands. */ | |
709 | ||
710 | void | |
711 | _initialize_coff_pe_read (void) | |
712 | { | |
826ecc4d | 713 | add_setshow_zuinteger_cmd ("coff-pe-read", class_maintenance, |
b75bf488 PA |
714 | &debug_coff_pe_read, |
715 | _("Set coff PE read debugging."), | |
716 | _("Show coff PE read debugging."), | |
717 | _("When set, debugging messages for coff reading " | |
718 | "of exported symbols are displayed."), | |
719 | NULL, show_debug_coff_pe_read, | |
720 | &setdebuglist, &showdebuglist); | |
3999122f | 721 | } |