Fix unused function error
[deliverable/binutils-gdb.git] / gdb / coff-pe-read.c
CommitLineData
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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
42a4f53d 5 Copyright (C) 2003-2019 Free Software Foundation, Inc.
1b6bc7e0
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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
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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
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24#include "defs.h"
25
4de283e4 26#include "coff-pe-read.h"
1b6bc7e0 27
81de56be 28#include "bfd.h"
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TT
29#include "gdbtypes.h"
30
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31#include "command.h"
32#include "gdbcmd.h"
d55e5aa6 33#include "symtab.h"
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TT
34#include "symfile.h"
35#include "objfiles.h"
268a13a5 36#include "gdbsupport/common-utils.h"
4de283e4
TT
37#include "coff/internal.h"
38
39#include <ctype.h>
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40
41/* Internal section information */
42
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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. */
47static unsigned int debug_coff_pe_read;
48
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49struct read_pe_section_data
50{
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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. */
3173aa2f 57 std::string section_name; /* Recorded section name. */
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58};
59
78ea0eca
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60#define IMAGE_SCN_CNT_CODE 0x20
61#define IMAGE_SCN_CNT_INITIALIZED_DATA 0x40
62#define IMAGE_SCN_CNT_UNINITIALIZED_DATA 0x80
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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. */
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72
73static int
74read_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.
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98 text, data and bss in that order. Return PE_SECTION_INDEX_INVALID
99 if passed an unrecognised section name. */
100
101static int
102get_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++)
3173aa2f 109 if (sections[i].section_name == section_name)
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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. */
117struct 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. */
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124
125static void
126get_section_vmas (bfd *abfd, asection *sectp, void *context)
127{
9a3c8263 128 struct pe_sections_info *data = (struct pe_sections_info *) context;
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129 struct read_pe_section_data *sections = data->sections;
130 int sectix = get_pe_section_index (sectp->name, sections,
131 data->nb_sections);
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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. */
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137
138 sections[sectix].vma_offset
fd361982 139 = bfd_section_vma (sectp) - sections[sectix].rva_start;
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140 }
141}
142\f
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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. */
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151
152static void
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153add_pe_exported_sym (minimal_symbol_reader &reader,
154 const char *sym_name,
1b6bc7e0 155 unsigned long func_rva,
3999122f 156 int ordinal,
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157 const struct read_pe_section_data *section_data,
158 const char *dll_name, struct objfile *objfile)
159{
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;
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162
163 /* Generate a (hopefully unique) qualified name using the first part
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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
528e1572 167 std::string bare_name;
3999122f 168 if (sym_name == NULL || *sym_name == '\0')
528e1572 169 bare_name = string_printf ("#%d", ordinal);
3999122f 170 else
528e1572 171 bare_name = sym_name;
3999122f 172
528e1572
SM
173 std::string qualified_name
174 = string_printf ("%s!%s", dll_name, bare_name.c_str ());
1b6bc7e0 175
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176 if ((section_data->ms_type == mst_unknown) && debug_coff_pe_read)
177 fprintf_unfiltered (gdb_stdlog , _("Unknown section type for \"%s\""
178 " for entry \"%s\" in dll \"%s\"\n"),
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TT
179 section_data->section_name.c_str (), sym_name,
180 dll_name);
1b6bc7e0 181
528e1572 182 reader.record_with_info (qualified_name.c_str (), vma, section_data->ms_type,
8dddcb8f 183 section_data->index);
1b6bc7e0 184
3999122f 185 /* Enter the plain name as well, which might not be unique. */
528e1572 186 reader.record_with_info (bare_name.c_str (), vma, section_data->ms_type,
8dddcb8f 187 section_data->index);
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188 if (debug_coff_pe_read > 1)
189 fprintf_unfiltered (gdb_stdlog, _("Adding exported symbol \"%s\""
190 " in dll \"%s\"\n"), sym_name, dll_name);
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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
202static int
8dddcb8f
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203add_pe_forwarded_sym (minimal_symbol_reader &reader,
204 const char *sym_name, const char *forward_dll_name,
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205 const char *forward_func_name, int ordinal,
206 const char *dll_name, struct objfile *objfile)
207{
2273f0ac 208 CORE_ADDR vma, baseaddr;
7cbd4a93 209 struct bound_minimal_symbol msymbol;
3999122f 210 enum minimal_symbol_type msymtype;
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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;
224c3ddb 214 char *forward_qualified_name = (char *) alloca (forward_len);
f93ba80c 215 short section;
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216
217 xsnprintf (forward_qualified_name, forward_len, "%s!%s", forward_dll_name,
218 forward_func_name);
219
220
64cc34d8 221 msymbol = lookup_bound_minimal_symbol (forward_qualified_name);
3999122f 222
7cbd4a93 223 if (!msymbol.minsym)
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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]);
64cc34d8 229 msymbol = lookup_bound_minimal_symbol (forward_qualified_name);
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230 }
231
7cbd4a93 232 if (!msymbol.minsym)
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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
77e371c0 247 vma = BMSYMBOL_VALUE_ADDRESS (msymbol);
7cbd4a93 248 msymtype = MSYMBOL_TYPE (msymbol.minsym);
efd66ac6 249 section = MSYMBOL_SECTION (msymbol.minsym);
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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
528e1572 255 std::string bare_name;
3999122f 256 if (sym_name == NULL || *sym_name == '\0')
528e1572 257 bare_name = string_printf ("#%d", ordinal);
3999122f 258 else
528e1572 259 bare_name = sym_name;
3999122f 260
528e1572
SM
261 std::string qualified_name
262 = string_printf ("%s!%s", dll_name, bare_name.c_str ());
3999122f 263
2273f0ac
TT
264 /* Note that this code makes a minimal symbol whose value may point
265 outside of any section in this objfile. These symbols can't
266 really be relocated properly, but nevertheless we make a stab at
267 it, choosing an approach consistent with the history of this
268 code. */
269 baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
270
528e1572
SM
271 reader.record_with_info (qualified_name.c_str (), vma - baseaddr, msymtype,
272 section);
1b6bc7e0 273
aff410f1 274 /* Enter the plain name as well, which might not be unique. */
528e1572
SM
275 reader.record_with_info (bare_name.c_str(), vma - baseaddr, msymtype,
276 section);
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277
278 return 1;
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279}
280
3999122f 281/* Truncate a dll_name at the last dot character. */
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282
283static void
284read_pe_truncate_name (char *dll_name)
285{
3999122f 286 char *last_point = strrchr (dll_name, '.');
1b6bc7e0 287
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288 if (last_point != NULL)
289 *last_point = '\0';
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290}
291\f
aff410f1 292/* Low-level support functions, direct from the ld module pe-dll.c. */
1b6bc7e0
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293static unsigned int
294pe_get16 (bfd *abfd, int where)
295{
296 unsigned char b[2];
297
298 bfd_seek (abfd, (file_ptr) where, SEEK_SET);
299 bfd_bread (b, (bfd_size_type) 2, abfd);
300 return b[0] + (b[1] << 8);
301}
302
303static unsigned int
304pe_get32 (bfd *abfd, int where)
305{
306 unsigned char b[4];
307
308 bfd_seek (abfd, (file_ptr) where, SEEK_SET);
309 bfd_bread (b, (bfd_size_type) 4, abfd);
310 return b[0] + (b[1] << 8) + (b[2] << 16) + (b[3] << 24);
311}
312
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313static unsigned int
314pe_as16 (void *ptr)
315{
9a3c8263 316 unsigned char *b = (unsigned char *) ptr;
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317
318 return b[0] + (b[1] << 8);
319}
320
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321static unsigned int
322pe_as32 (void *ptr)
323{
9a3c8263 324 unsigned char *b = (unsigned char *) ptr;
1b6bc7e0
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325
326 return b[0] + (b[1] << 8) + (b[2] << 16) + (b[3] << 24);
327}
328\f
329/* Read the (non-debug) export symbol table from a portable
aff410f1
MS
330 executable. Code originally lifted from the ld function
331 pe_implied_import_dll in pe-dll.c. */
1b6bc7e0
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332
333void
8dddcb8f
TT
334read_pe_exported_syms (minimal_symbol_reader &reader,
335 struct objfile *objfile)
1b6bc7e0
CF
336{
337 bfd *dll = objfile->obfd;
3999122f 338 unsigned long nbnormal, nbforward;
1b6bc7e0 339 unsigned long pe_header_offset, opthdr_ofs, num_entries, i;
3999122f 340 unsigned long export_opthdrrva, export_opthdrsize;
1b6bc7e0
CF
341 unsigned long export_rva, export_size, nsections, secptr, expptr;
342 unsigned long exp_funcbase;
343 unsigned char *expdata, *erva;
344 unsigned long name_rvas, ordinals, nexp, ordbase;
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345 char *dll_name = (char *) dll->filename;
346 int otherix = PE_SECTION_TABLE_SIZE;
a68ddad5
KT
347 int is_pe64 = 0;
348 int is_pe32 = 0;
1b6bc7e0
CF
349
350 /* Array elements are for text, data and bss in that order
3999122f 351 Initialization with RVA_START > RVA_END guarantees that
aff410f1 352 unused sections won't be matched. */
3999122f 353 struct pe_sections_info pe_sections_info;
1b6bc7e0 354
1b6bc7e0
CF
355 char const *target = bfd_get_target (objfile->obfd);
356
3173aa2f
TT
357 std::vector<struct read_pe_section_data> section_data
358 (PE_SECTION_TABLE_SIZE);
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359
360 for (i=0; i < PE_SECTION_TABLE_SIZE; i++)
361 {
362 section_data[i].vma_offset = 0;
363 section_data[i].rva_start = 1;
364 section_data[i].rva_end = 0;
365 };
366 section_data[PE_SECTION_INDEX_TEXT].ms_type = mst_text;
367 section_data[PE_SECTION_INDEX_TEXT].section_name = ".text";
368 section_data[PE_SECTION_INDEX_DATA].ms_type = mst_data;
369 section_data[PE_SECTION_INDEX_DATA].section_name = ".data";
370 section_data[PE_SECTION_INDEX_BSS].ms_type = mst_bss;
371 section_data[PE_SECTION_INDEX_BSS].section_name = ".bss";
372
5e13bd89
PA
373 is_pe64 = (strcmp (target, "pe-x86-64") == 0
374 || strcmp (target, "pei-x86-64") == 0);
375 is_pe32 = (strcmp (target, "pe-i386") == 0
376 || strcmp (target, "pei-i386") == 0
377 || strcmp (target, "pe-arm-wince-little") == 0
378 || strcmp (target, "pei-arm-wince-little") == 0);
a68ddad5 379 if (!is_pe32 && !is_pe64)
1b6bc7e0 380 {
5e13bd89
PA
381 /* This is not a recognized PE format file. Abort now, because
382 the code is untested on anything else. *FIXME* test on
aff410f1 383 further architectures and loosen or remove this test. */
1b6bc7e0
CF
384 return;
385 }
386
387 /* Get pe_header, optional header and numbers of export entries. */
388 pe_header_offset = pe_get32 (dll, 0x3c);
389 opthdr_ofs = pe_header_offset + 4 + 20;
a68ddad5 390 if (is_pe64)
1dac1b47 391 num_entries = pe_get32 (dll, opthdr_ofs + 108);
a68ddad5
KT
392 else
393 num_entries = pe_get32 (dll, opthdr_ofs + 92);
1b6bc7e0
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394
395 if (num_entries < 1) /* No exports. */
3173aa2f 396 return;
a68ddad5
KT
397 if (is_pe64)
398 {
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399 export_opthdrrva = pe_get32 (dll, opthdr_ofs + 112);
400 export_opthdrsize = pe_get32 (dll, opthdr_ofs + 116);
a68ddad5
KT
401 }
402 else
403 {
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404 export_opthdrrva = pe_get32 (dll, opthdr_ofs + 96);
405 export_opthdrsize = pe_get32 (dll, opthdr_ofs + 100);
a68ddad5 406 }
1b6bc7e0
CF
407 nsections = pe_get16 (dll, pe_header_offset + 4 + 2);
408 secptr = (pe_header_offset + 4 + 20 +
409 pe_get16 (dll, pe_header_offset + 4 + 16));
410 expptr = 0;
3999122f 411 export_size = 0;
1b6bc7e0
CF
412
413 /* Get the rva and size of the export section. */
414 for (i = 0; i < nsections; i++)
415 {
416 char sname[8];
417 unsigned long secptr1 = secptr + 40 * i;
418 unsigned long vaddr = pe_get32 (dll, secptr1 + 12);
419 unsigned long vsize = pe_get32 (dll, secptr1 + 16);
420 unsigned long fptr = pe_get32 (dll, secptr1 + 20);
421
422 bfd_seek (dll, (file_ptr) secptr1, SEEK_SET);
3999122f 423 bfd_bread (sname, (bfd_size_type) sizeof (sname), dll);
1b6bc7e0 424
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425 if ((strcmp (sname, ".edata") == 0)
426 || (vaddr <= export_opthdrrva && export_opthdrrva < vaddr + vsize))
1b6bc7e0 427 {
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428 if (strcmp (sname, ".edata") != 0)
429 {
430 if (debug_coff_pe_read)
431 fprintf_unfiltered (gdb_stdlog, _("Export RVA for dll "
432 "\"%s\" is in section \"%s\"\n"),
433 dll_name, sname);
434 }
435 else if (export_opthdrrva != vaddr && debug_coff_pe_read)
436 fprintf_unfiltered (gdb_stdlog, _("Wrong value of export RVA"
437 " for dll \"%s\": 0x%lx instead of 0x%lx\n"),
438 dll_name, export_opthdrrva, vaddr);
439 expptr = fptr + (export_opthdrrva - vaddr);
1b6bc7e0
CF
440 break;
441 }
442 }
443
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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);
aab2f004 461 char sec_name[SCNNMLEN + 1];
1b6bc7e0 462 int sectix;
f93ba80c
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463 unsigned int bfd_section_index;
464 asection *section;
1b6bc7e0 465
1b6bc7e0 466 bfd_seek (dll, (file_ptr) secptr1 + 0, SEEK_SET);
aab2f004
PA
467 bfd_bread (sec_name, (bfd_size_type) SCNNMLEN, dll);
468 sec_name[SCNNMLEN] = '\0';
1b6bc7e0
CF
469
470 sectix = read_pe_section_index (sec_name);
f93ba80c
PM
471 section = bfd_get_section_by_name (dll, sec_name);
472 if (section)
473 bfd_section_index = section->index;
474 else
475 bfd_section_index = -1;
1b6bc7e0
CF
476
477 if (sectix != PE_SECTION_INDEX_INVALID)
478 {
479 section_data[sectix].rva_start = vaddr;
480 section_data[sectix].rva_end = vaddr + vsize;
f93ba80c 481 section_data[sectix].index = bfd_section_index;
1b6bc7e0 482 }
3999122f
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483 else
484 {
3173aa2f
TT
485 section_data.resize (otherix + 1);
486 section_data[otherix].section_name = sec_name;
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487 section_data[otherix].rva_start = vaddr;
488 section_data[otherix].rva_end = vaddr + vsize;
489 section_data[otherix].vma_offset = 0;
f93ba80c 490 section_data[otherix].index = bfd_section_index;
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491 if (characteristics & IMAGE_SCN_CNT_CODE)
492 section_data[otherix].ms_type = mst_text;
493 else if (characteristics & IMAGE_SCN_CNT_INITIALIZED_DATA)
494 section_data[otherix].ms_type = mst_data;
495 else if (characteristics & IMAGE_SCN_CNT_UNINITIALIZED_DATA)
496 section_data[otherix].ms_type = mst_bss;
497 else
498 section_data[otherix].ms_type = mst_unknown;
499 otherix++;
500 }
1b6bc7e0
CF
501 }
502
3173aa2f
TT
503 gdb::def_vector<unsigned char> expdata_storage (export_size);
504 expdata = expdata_storage.data ();
1b6bc7e0
CF
505
506 bfd_seek (dll, (file_ptr) expptr, SEEK_SET);
507 bfd_bread (expdata, (bfd_size_type) export_size, dll);
508 erva = expdata - export_rva;
509
510 nexp = pe_as32 (expdata + 24);
511 name_rvas = pe_as32 (expdata + 32);
512 ordinals = pe_as32 (expdata + 36);
513 ordbase = pe_as32 (expdata + 16);
514 exp_funcbase = pe_as32 (expdata + 28);
515
aff410f1 516 /* Use internal dll name instead of full pathname. */
db5be46f 517 dll_name = (char *) (pe_as32 (expdata + 12) + erva);
1b6bc7e0 518
3999122f 519 pe_sections_info.nb_sections = otherix;
3173aa2f 520 pe_sections_info.sections = section_data.data ();
3999122f
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521
522 bfd_map_over_sections (dll, get_section_vmas, &pe_sections_info);
1b6bc7e0 523
1b6bc7e0 524 /* Truncate name at first dot. Should maybe also convert to all
aff410f1 525 lower case for convenience on Windows. */
1b6bc7e0
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526 read_pe_truncate_name (dll_name);
527
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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;
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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);
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538 /* Retrieve ordinal value. */
539
540 unsigned long ordinal = pe_as16 (erva + ordinals + i * 2);
541
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542
543 /* Pointer to the function address vector. */
85102364 544 /* This is relative to ordinal value. */
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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;
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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
224c3ddb 565 forward_dll_name = (char *) alloca (len + 1);
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566 strncpy (forward_dll_name, forward_name, len);
567 forward_dll_name[len] = '\0';
568 forward_func_name = ++sep;
569 }
8dddcb8f 570 if (add_pe_forwarded_sym (reader, funcname, forward_dll_name,
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571 forward_func_name, ordinal,
572 dll_name, objfile) != 0)
573 ++nbforward;
574 continue;
575 }
576
577 for (sectix = 0; sectix < otherix; ++sectix)
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578 {
579 if ((func_rva >= section_data[sectix].rva_start)
580 && (func_rva < section_data[sectix].rva_end))
581 {
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582 char *sym_name = (char *) (erva + name_rva);
583
3999122f 584 section_found = 1;
8dddcb8f 585 add_pe_exported_sym (reader, sym_name, func_rva, ordinal,
3173aa2f 586 &section_data[sectix], dll_name, objfile);
3999122f 587 ++nbnormal;
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588 break;
589 }
590 }
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591 if (!section_found)
592 {
593 char *funcname = (char *) (erva + name_rva);
594
595 if (name_rva == 0)
596 {
8dddcb8f 597 add_pe_exported_sym (reader, NULL, func_rva, ordinal,
3173aa2f 598 &section_data[0], dll_name, objfile);
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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 }
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606 }
607
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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);
1b6bc7e0 612}
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613
614/* Extract from ABFD the offset of the .text section.
615 This offset is mainly related to the offset within the file.
616 The value was previously expected to be 0x1000 for all files,
30baf67b 617 but some Windows OS core DLLs seem to use 0x10000 section alignment
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618 which modified the return value of that function.
619 Still return default 0x1000 value if ABFD is NULL or
620 if '.text' section is not found, but that should not happen... */
621
622#define DEFAULT_COFF_PE_TEXT_SECTION_OFFSET 0x1000
623
624CORE_ADDR
625pe_text_section_offset (struct bfd *abfd)
626
627{
cebca8c1
AR
628 unsigned long pe_header_offset, i;
629 unsigned long nsections, secptr;
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630 int is_pe64 = 0;
631 int is_pe32 = 0;
632 char const *target;
633
634 if (!abfd)
635 return DEFAULT_COFF_PE_TEXT_SECTION_OFFSET;
636
637 target = bfd_get_target (abfd);
638
639 is_pe64 = (strcmp (target, "pe-x86-64") == 0
640 || strcmp (target, "pei-x86-64") == 0);
641 is_pe32 = (strcmp (target, "pe-i386") == 0
642 || strcmp (target, "pei-i386") == 0
643 || strcmp (target, "pe-arm-wince-little") == 0
644 || strcmp (target, "pei-arm-wince-little") == 0);
645
646 if (!is_pe32 && !is_pe64)
647 {
648 /* This is not a recognized PE format file. Abort now, because
649 the code is untested on anything else. *FIXME* test on
650 further architectures and loosen or remove this test. */
651 return DEFAULT_COFF_PE_TEXT_SECTION_OFFSET;
652 }
653
654 /* Get pe_header, optional header and numbers of sections. */
655 pe_header_offset = pe_get32 (abfd, 0x3c);
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656 nsections = pe_get16 (abfd, pe_header_offset + 4 + 2);
657 secptr = (pe_header_offset + 4 + 20 +
658 pe_get16 (abfd, pe_header_offset + 4 + 16));
659
660 /* Get the rva and size of the export section. */
661 for (i = 0; i < nsections; i++)
662 {
d8f4a83e 663 char sname[SCNNMLEN + 1];
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664 unsigned long secptr1 = secptr + 40 * i;
665 unsigned long vaddr = pe_get32 (abfd, secptr1 + 12);
666
667 bfd_seek (abfd, (file_ptr) secptr1, SEEK_SET);
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668 bfd_bread (sname, (bfd_size_type) SCNNMLEN, abfd);
669 sname[SCNNMLEN] = '\0';
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670 if (strcmp (sname, ".text") == 0)
671 return vaddr;
672 }
673
674 return DEFAULT_COFF_PE_TEXT_SECTION_OFFSET;
675}
676
677/* Implements "show debug coff_pe_read" command. */
678
679static void
680show_debug_coff_pe_read (struct ui_file *file, int from_tty,
681 struct cmd_list_element *c, const char *value)
682{
683 fprintf_filtered (file, _("Coff PE read debugging is %s.\n"), value);
684}
685
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686/* Adds "Set/show debug coff_pe_read" commands. */
687
688void
689_initialize_coff_pe_read (void)
690{
826ecc4d 691 add_setshow_zuinteger_cmd ("coff-pe-read", class_maintenance,
b75bf488
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692 &debug_coff_pe_read,
693 _("Set coff PE read debugging."),
694 _("Show coff PE read debugging."),
695 _("When set, debugging messages for coff reading "
696 "of exported symbols are displayed."),
697 NULL, show_debug_coff_pe_read,
698 &setdebuglist, &showdebuglist);
3999122f 699}
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