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bb2ec1b3 TT |
1 | /* Load module for 'compile' command. |
2 | ||
32d0add0 | 3 | Copyright (C) 2014-2015 Free Software Foundation, Inc. |
bb2ec1b3 TT |
4 | |
5 | This file is part of GDB. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 3 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
19 | ||
20 | #include "defs.h" | |
21 | #include "compile-object-load.h" | |
22 | #include "compile-internal.h" | |
23 | #include "command.h" | |
24 | #include "objfiles.h" | |
25 | #include "gdbcore.h" | |
26 | #include "readline/tilde.h" | |
27 | #include "bfdlink.h" | |
28 | #include "gdbcmd.h" | |
29 | #include "regcache.h" | |
30 | #include "inferior.h" | |
31 | #include "compile.h" | |
32 | #include "arch-utils.h" | |
33 | ||
34 | /* Helper data for setup_sections. */ | |
35 | ||
36 | struct setup_sections_data | |
37 | { | |
38 | /* Size of all recent sections with matching LAST_PROT. */ | |
39 | CORE_ADDR last_size; | |
40 | ||
41 | /* First section matching LAST_PROT. */ | |
42 | asection *last_section_first; | |
43 | ||
44 | /* Memory protection like the prot parameter of gdbarch_infcall_mmap. */ | |
45 | unsigned last_prot; | |
46 | ||
47 | /* Maximum of alignments of all sections matching LAST_PROT. | |
48 | This value is always at least 1. This value is always a power of 2. */ | |
49 | CORE_ADDR last_max_alignment; | |
50 | }; | |
51 | ||
52 | /* Place all ABFD sections next to each other obeying all constraints. */ | |
53 | ||
54 | static void | |
55 | setup_sections (bfd *abfd, asection *sect, void *data_voidp) | |
56 | { | |
57 | struct setup_sections_data *data = data_voidp; | |
58 | CORE_ADDR alignment; | |
59 | unsigned prot; | |
60 | ||
61 | if (sect != NULL) | |
62 | { | |
63 | /* It is required by later bfd_get_relocated_section_contents. */ | |
64 | if (sect->output_section == NULL) | |
65 | sect->output_section = sect; | |
66 | ||
67 | if ((bfd_get_section_flags (abfd, sect) & SEC_ALLOC) == 0) | |
68 | return; | |
69 | ||
bb2b33b9 | 70 | /* Make the memory always readable. */ |
bb2ec1b3 TT |
71 | prot = GDB_MMAP_PROT_READ; |
72 | if ((bfd_get_section_flags (abfd, sect) & SEC_READONLY) == 0) | |
73 | prot |= GDB_MMAP_PROT_WRITE; | |
74 | if ((bfd_get_section_flags (abfd, sect) & SEC_CODE) != 0) | |
75 | prot |= GDB_MMAP_PROT_EXEC; | |
76 | ||
77 | if (compile_debug) | |
78 | fprintf_unfiltered (gdb_stdout, | |
79 | "module \"%s\" section \"%s\" size %s prot %u\n", | |
80 | bfd_get_filename (abfd), | |
81 | bfd_get_section_name (abfd, sect), | |
82 | paddress (target_gdbarch (), | |
83 | bfd_get_section_size (sect)), | |
84 | prot); | |
85 | } | |
86 | else | |
87 | prot = -1; | |
88 | ||
89 | if (sect == NULL | |
90 | || (data->last_prot != prot && bfd_get_section_size (sect) != 0)) | |
91 | { | |
92 | CORE_ADDR addr; | |
93 | asection *sect_iter; | |
94 | ||
95 | if (data->last_size != 0) | |
96 | { | |
97 | addr = gdbarch_infcall_mmap (target_gdbarch (), data->last_size, | |
98 | data->last_prot); | |
99 | if (compile_debug) | |
100 | fprintf_unfiltered (gdb_stdout, | |
101 | "allocated %s bytes at %s prot %u\n", | |
102 | paddress (target_gdbarch (), data->last_size), | |
103 | paddress (target_gdbarch (), addr), | |
104 | data->last_prot); | |
105 | } | |
106 | else | |
107 | addr = 0; | |
108 | ||
109 | if ((addr & (data->last_max_alignment - 1)) != 0) | |
110 | error (_("Inferior compiled module address %s " | |
111 | "is not aligned to BFD required %s."), | |
112 | paddress (target_gdbarch (), addr), | |
113 | paddress (target_gdbarch (), data->last_max_alignment)); | |
114 | ||
115 | for (sect_iter = data->last_section_first; sect_iter != sect; | |
116 | sect_iter = sect_iter->next) | |
117 | if ((bfd_get_section_flags (abfd, sect_iter) & SEC_ALLOC) != 0) | |
118 | bfd_set_section_vma (abfd, sect_iter, | |
119 | addr + bfd_get_section_vma (abfd, sect_iter)); | |
120 | ||
121 | data->last_size = 0; | |
122 | data->last_section_first = sect; | |
123 | data->last_prot = prot; | |
124 | data->last_max_alignment = 1; | |
125 | } | |
126 | ||
127 | if (sect == NULL) | |
128 | return; | |
129 | ||
130 | alignment = ((CORE_ADDR) 1) << bfd_get_section_alignment (abfd, sect); | |
131 | data->last_max_alignment = max (data->last_max_alignment, alignment); | |
132 | ||
133 | data->last_size = (data->last_size + alignment - 1) & -alignment; | |
134 | ||
135 | bfd_set_section_vma (abfd, sect, data->last_size); | |
136 | ||
137 | data->last_size += bfd_get_section_size (sect); | |
138 | data->last_size = (data->last_size + alignment - 1) & -alignment; | |
139 | } | |
140 | ||
141 | /* Helper for link_callbacks callbacks vector. */ | |
142 | ||
143 | static bfd_boolean | |
144 | link_callbacks_multiple_definition (struct bfd_link_info *link_info, | |
145 | struct bfd_link_hash_entry *h, bfd *nbfd, | |
146 | asection *nsec, bfd_vma nval) | |
147 | { | |
148 | bfd *abfd = link_info->input_bfds; | |
149 | ||
150 | if (link_info->allow_multiple_definition) | |
151 | return TRUE; | |
8e8347b8 | 152 | warning (_("Compiled module \"%s\": multiple symbol definitions: %s"), |
bb2ec1b3 TT |
153 | bfd_get_filename (abfd), h->root.string); |
154 | return FALSE; | |
155 | } | |
156 | ||
157 | /* Helper for link_callbacks callbacks vector. */ | |
158 | ||
159 | static bfd_boolean | |
160 | link_callbacks_warning (struct bfd_link_info *link_info, const char *xwarning, | |
161 | const char *symbol, bfd *abfd, asection *section, | |
162 | bfd_vma address) | |
163 | { | |
8e8347b8 | 164 | warning (_("Compiled module \"%s\" section \"%s\": warning: %s"), |
bb2ec1b3 TT |
165 | bfd_get_filename (abfd), bfd_get_section_name (abfd, section), |
166 | xwarning); | |
167 | /* Maybe permit running as a module? */ | |
168 | return FALSE; | |
169 | } | |
170 | ||
171 | /* Helper for link_callbacks callbacks vector. */ | |
172 | ||
173 | static bfd_boolean | |
174 | link_callbacks_undefined_symbol (struct bfd_link_info *link_info, | |
175 | const char *name, bfd *abfd, asection *section, | |
176 | bfd_vma address, bfd_boolean is_fatal) | |
177 | { | |
178 | warning (_("Cannot resolve relocation to \"%s\" " | |
179 | "from compiled module \"%s\" section \"%s\"."), | |
180 | name, bfd_get_filename (abfd), bfd_get_section_name (abfd, section)); | |
181 | return FALSE; | |
182 | } | |
183 | ||
184 | /* Helper for link_callbacks callbacks vector. */ | |
185 | ||
186 | static bfd_boolean | |
187 | link_callbacks_reloc_overflow (struct bfd_link_info *link_info, | |
188 | struct bfd_link_hash_entry *entry, | |
189 | const char *name, const char *reloc_name, | |
190 | bfd_vma addend, bfd *abfd, asection *section, | |
191 | bfd_vma address) | |
192 | { | |
193 | /* TRUE is required for intra-module relocations. */ | |
194 | return TRUE; | |
195 | } | |
196 | ||
197 | /* Helper for link_callbacks callbacks vector. */ | |
198 | ||
199 | static bfd_boolean | |
200 | link_callbacks_reloc_dangerous (struct bfd_link_info *link_info, | |
201 | const char *message, bfd *abfd, | |
202 | asection *section, bfd_vma address) | |
203 | { | |
204 | warning (_("Compiled module \"%s\" section \"%s\": dangerous " | |
205 | "relocation: %s\n"), | |
206 | bfd_get_filename (abfd), bfd_get_section_name (abfd, section), | |
207 | message); | |
208 | return FALSE; | |
209 | } | |
210 | ||
211 | /* Helper for link_callbacks callbacks vector. */ | |
212 | ||
213 | static bfd_boolean | |
214 | link_callbacks_unattached_reloc (struct bfd_link_info *link_info, | |
215 | const char *name, bfd *abfd, asection *section, | |
216 | bfd_vma address) | |
217 | { | |
218 | warning (_("Compiled module \"%s\" section \"%s\": unattached " | |
219 | "relocation: %s\n"), | |
220 | bfd_get_filename (abfd), bfd_get_section_name (abfd, section), | |
221 | name); | |
222 | return FALSE; | |
223 | } | |
224 | ||
225 | /* Helper for link_callbacks callbacks vector. */ | |
226 | ||
77b64a49 PA |
227 | static void link_callbacks_einfo (const char *fmt, ...) |
228 | ATTRIBUTE_PRINTF (1, 2); | |
229 | ||
bb2ec1b3 TT |
230 | static void |
231 | link_callbacks_einfo (const char *fmt, ...) | |
232 | { | |
233 | struct cleanup *cleanups; | |
234 | va_list ap; | |
235 | char *str; | |
236 | ||
237 | va_start (ap, fmt); | |
238 | str = xstrvprintf (fmt, ap); | |
239 | va_end (ap); | |
240 | cleanups = make_cleanup (xfree, str); | |
241 | ||
8e8347b8 | 242 | warning (_("Compile module: warning: %s"), str); |
bb2ec1b3 TT |
243 | |
244 | do_cleanups (cleanups); | |
245 | } | |
246 | ||
247 | /* Helper for bfd_get_relocated_section_contents. | |
248 | Only these symbols are set by bfd_simple_get_relocated_section_contents | |
249 | but bfd/ seems to use even the NULL ones without checking them first. */ | |
250 | ||
251 | static const struct bfd_link_callbacks link_callbacks = | |
252 | { | |
253 | NULL, /* add_archive_element */ | |
254 | link_callbacks_multiple_definition, /* multiple_definition */ | |
255 | NULL, /* multiple_common */ | |
256 | NULL, /* add_to_set */ | |
257 | NULL, /* constructor */ | |
258 | link_callbacks_warning, /* warning */ | |
259 | link_callbacks_undefined_symbol, /* undefined_symbol */ | |
260 | link_callbacks_reloc_overflow, /* reloc_overflow */ | |
261 | link_callbacks_reloc_dangerous, /* reloc_dangerous */ | |
262 | link_callbacks_unattached_reloc, /* unattached_reloc */ | |
263 | NULL, /* notice */ | |
264 | link_callbacks_einfo, /* einfo */ | |
265 | NULL, /* info */ | |
266 | NULL, /* minfo */ | |
267 | NULL, /* override_segment_assignment */ | |
268 | }; | |
269 | ||
270 | struct link_hash_table_cleanup_data | |
271 | { | |
272 | bfd *abfd; | |
273 | bfd *link_next; | |
274 | }; | |
275 | ||
276 | /* Cleanup callback for struct bfd_link_info. */ | |
277 | ||
278 | static void | |
279 | link_hash_table_free (void *d) | |
280 | { | |
281 | struct link_hash_table_cleanup_data *data = d; | |
282 | ||
283 | if (data->abfd->is_linker_output) | |
284 | (*data->abfd->link.hash->hash_table_free) (data->abfd); | |
285 | data->abfd->link.next = data->link_next; | |
286 | } | |
287 | ||
288 | /* Relocate and store into inferior memory each section SECT of ABFD. */ | |
289 | ||
290 | static void | |
291 | copy_sections (bfd *abfd, asection *sect, void *data) | |
292 | { | |
293 | asymbol **symbol_table = data; | |
294 | bfd_byte *sect_data, *sect_data_got; | |
295 | struct cleanup *cleanups; | |
296 | struct bfd_link_info link_info; | |
297 | struct bfd_link_order link_order; | |
298 | CORE_ADDR inferior_addr; | |
299 | struct link_hash_table_cleanup_data cleanup_data; | |
300 | ||
301 | if ((bfd_get_section_flags (abfd, sect) & (SEC_ALLOC | SEC_LOAD)) | |
302 | != (SEC_ALLOC | SEC_LOAD)) | |
303 | return; | |
304 | ||
305 | if (bfd_get_section_size (sect) == 0) | |
306 | return; | |
307 | ||
308 | /* Mostly a copy of bfd_simple_get_relocated_section_contents which GDB | |
309 | cannot use as it does not report relocations to undefined symbols. */ | |
310 | memset (&link_info, 0, sizeof (link_info)); | |
311 | link_info.output_bfd = abfd; | |
312 | link_info.input_bfds = abfd; | |
313 | link_info.input_bfds_tail = &abfd->link.next; | |
314 | ||
315 | cleanup_data.abfd = abfd; | |
316 | cleanup_data.link_next = abfd->link.next; | |
317 | ||
318 | abfd->link.next = NULL; | |
319 | link_info.hash = bfd_link_hash_table_create (abfd); | |
320 | ||
321 | cleanups = make_cleanup (link_hash_table_free, &cleanup_data); | |
322 | link_info.callbacks = &link_callbacks; | |
323 | ||
324 | memset (&link_order, 0, sizeof (link_order)); | |
325 | link_order.next = NULL; | |
326 | link_order.type = bfd_indirect_link_order; | |
327 | link_order.offset = 0; | |
328 | link_order.size = bfd_get_section_size (sect); | |
329 | link_order.u.indirect.section = sect; | |
330 | ||
331 | sect_data = xmalloc (bfd_get_section_size (sect)); | |
332 | make_cleanup (xfree, sect_data); | |
333 | ||
334 | sect_data_got = bfd_get_relocated_section_contents (abfd, &link_info, | |
335 | &link_order, sect_data, | |
336 | FALSE, symbol_table); | |
337 | ||
338 | if (sect_data_got == NULL) | |
339 | error (_("Cannot map compiled module \"%s\" section \"%s\": %s"), | |
340 | bfd_get_filename (abfd), bfd_get_section_name (abfd, sect), | |
341 | bfd_errmsg (bfd_get_error ())); | |
342 | gdb_assert (sect_data_got == sect_data); | |
343 | ||
344 | inferior_addr = bfd_get_section_vma (abfd, sect); | |
345 | if (0 != target_write_memory (inferior_addr, sect_data, | |
346 | bfd_get_section_size (sect))) | |
347 | error (_("Cannot write compiled module \"%s\" section \"%s\" " | |
348 | "to inferior memory range %s-%s."), | |
349 | bfd_get_filename (abfd), bfd_get_section_name (abfd, sect), | |
350 | paddress (target_gdbarch (), inferior_addr), | |
351 | paddress (target_gdbarch (), | |
352 | inferior_addr + bfd_get_section_size (sect))); | |
353 | ||
354 | do_cleanups (cleanups); | |
355 | } | |
356 | ||
357 | /* Fetch the type of first parameter of GCC_FE_WRAPPER_FUNCTION. | |
358 | Return NULL if GCC_FE_WRAPPER_FUNCTION has no parameters. | |
359 | Throw an error otherwise. */ | |
360 | ||
361 | static struct type * | |
362 | get_regs_type (struct objfile *objfile) | |
363 | { | |
364 | struct symbol *func_sym; | |
365 | struct type *func_type, *regsp_type, *regs_type; | |
366 | ||
367 | func_sym = lookup_global_symbol_from_objfile (objfile, | |
368 | GCC_FE_WRAPPER_FUNCTION, | |
369 | VAR_DOMAIN); | |
370 | if (func_sym == NULL) | |
371 | error (_("Cannot find function \"%s\" in compiled module \"%s\"."), | |
372 | GCC_FE_WRAPPER_FUNCTION, objfile_name (objfile)); | |
373 | ||
374 | func_type = SYMBOL_TYPE (func_sym); | |
375 | if (TYPE_CODE (func_type) != TYPE_CODE_FUNC) | |
376 | error (_("Invalid type code %d of function \"%s\" in compiled " | |
377 | "module \"%s\"."), | |
378 | TYPE_CODE (func_type), GCC_FE_WRAPPER_FUNCTION, | |
379 | objfile_name (objfile)); | |
380 | ||
381 | /* No register parameter present. */ | |
382 | if (TYPE_NFIELDS (func_type) == 0) | |
383 | return NULL; | |
384 | ||
385 | if (TYPE_NFIELDS (func_type) != 1) | |
386 | error (_("Invalid %d parameters of function \"%s\" in compiled " | |
387 | "module \"%s\"."), | |
388 | TYPE_NFIELDS (func_type), GCC_FE_WRAPPER_FUNCTION, | |
389 | objfile_name (objfile)); | |
390 | ||
391 | regsp_type = check_typedef (TYPE_FIELD_TYPE (func_type, 0)); | |
392 | if (TYPE_CODE (regsp_type) != TYPE_CODE_PTR) | |
393 | error (_("Invalid type code %d of first parameter of function \"%s\" " | |
394 | "in compiled module \"%s\"."), | |
395 | TYPE_CODE (regsp_type), GCC_FE_WRAPPER_FUNCTION, | |
396 | objfile_name (objfile)); | |
397 | ||
398 | regs_type = check_typedef (TYPE_TARGET_TYPE (regsp_type)); | |
399 | if (TYPE_CODE (regs_type) != TYPE_CODE_STRUCT) | |
400 | error (_("Invalid type code %d of dereferenced first parameter " | |
401 | "of function \"%s\" in compiled module \"%s\"."), | |
402 | TYPE_CODE (regs_type), GCC_FE_WRAPPER_FUNCTION, | |
403 | objfile_name (objfile)); | |
404 | ||
405 | return regs_type; | |
406 | } | |
407 | ||
408 | /* Store all inferior registers required by REGS_TYPE to inferior memory | |
409 | starting at inferior address REGS_BASE. */ | |
410 | ||
411 | static void | |
412 | store_regs (struct type *regs_type, CORE_ADDR regs_base) | |
413 | { | |
414 | struct gdbarch *gdbarch = target_gdbarch (); | |
415 | struct regcache *regcache = get_thread_regcache (inferior_ptid); | |
416 | int fieldno; | |
417 | ||
418 | for (fieldno = 0; fieldno < TYPE_NFIELDS (regs_type); fieldno++) | |
419 | { | |
420 | const char *reg_name = TYPE_FIELD_NAME (regs_type, fieldno); | |
421 | ULONGEST reg_bitpos = TYPE_FIELD_BITPOS (regs_type, fieldno); | |
422 | ULONGEST reg_bitsize = TYPE_FIELD_BITSIZE (regs_type, fieldno); | |
423 | ULONGEST reg_offset; | |
424 | struct type *reg_type = check_typedef (TYPE_FIELD_TYPE (regs_type, | |
425 | fieldno)); | |
426 | ULONGEST reg_size = TYPE_LENGTH (reg_type); | |
427 | int regnum; | |
428 | struct value *regval; | |
429 | CORE_ADDR inferior_addr; | |
430 | ||
431 | if (strcmp (reg_name, COMPILE_I_SIMPLE_REGISTER_DUMMY) == 0) | |
432 | continue; | |
433 | ||
434 | if ((reg_bitpos % 8) != 0 || reg_bitsize != 0) | |
435 | error (_("Invalid register \"%s\" position %s bits or size %s bits"), | |
436 | reg_name, pulongest (reg_bitpos), pulongest (reg_bitsize)); | |
437 | reg_offset = reg_bitpos / 8; | |
438 | ||
439 | if (TYPE_CODE (reg_type) != TYPE_CODE_INT | |
440 | && TYPE_CODE (reg_type) != TYPE_CODE_PTR) | |
441 | error (_("Invalid register \"%s\" type code %d"), reg_name, | |
442 | TYPE_CODE (reg_type)); | |
443 | ||
444 | regnum = compile_register_name_demangle (gdbarch, reg_name); | |
445 | ||
446 | regval = value_from_register (reg_type, regnum, get_current_frame ()); | |
447 | if (value_optimized_out (regval)) | |
448 | error (_("Register \"%s\" is optimized out."), reg_name); | |
449 | if (!value_entirely_available (regval)) | |
450 | error (_("Register \"%s\" is not available."), reg_name); | |
451 | ||
452 | inferior_addr = regs_base + reg_offset; | |
453 | if (0 != target_write_memory (inferior_addr, value_contents (regval), | |
454 | reg_size)) | |
455 | error (_("Cannot write register \"%s\" to inferior memory at %s."), | |
456 | reg_name, paddress (gdbarch, inferior_addr)); | |
457 | } | |
458 | } | |
459 | ||
460 | /* Load OBJECT_FILE into inferior memory. Throw an error otherwise. | |
461 | Caller must fully dispose the return value by calling compile_object_run. | |
462 | SOURCE_FILE's copy is stored into the returned object. | |
463 | Caller should free both OBJECT_FILE and SOURCE_FILE immediatelly after this | |
464 | function returns. */ | |
465 | ||
466 | struct compile_module * | |
467 | compile_object_load (const char *object_file, const char *source_file) | |
468 | { | |
469 | struct cleanup *cleanups, *cleanups_free_objfile; | |
470 | bfd *abfd; | |
471 | struct setup_sections_data setup_sections_data; | |
472 | CORE_ADDR addr, func_addr, regs_addr; | |
473 | struct bound_minimal_symbol bmsym; | |
474 | long storage_needed; | |
475 | asymbol **symbol_table, **symp; | |
476 | long number_of_symbols, missing_symbols; | |
477 | struct type *dptr_type = builtin_type (target_gdbarch ())->builtin_data_ptr; | |
478 | unsigned dptr_type_len = TYPE_LENGTH (dptr_type); | |
479 | struct compile_module *retval; | |
480 | struct type *regs_type; | |
481 | char *filename, **matching; | |
482 | struct objfile *objfile; | |
483 | ||
484 | filename = tilde_expand (object_file); | |
485 | cleanups = make_cleanup (xfree, filename); | |
486 | ||
487 | abfd = gdb_bfd_open (filename, gnutarget, -1); | |
488 | if (abfd == NULL) | |
489 | error (_("\"%s\": could not open as compiled module: %s"), | |
490 | filename, bfd_errmsg (bfd_get_error ())); | |
491 | make_cleanup_bfd_unref (abfd); | |
492 | ||
493 | if (!bfd_check_format_matches (abfd, bfd_object, &matching)) | |
494 | error (_("\"%s\": not in loadable format: %s"), | |
495 | filename, gdb_bfd_errmsg (bfd_get_error (), matching)); | |
496 | ||
497 | if ((bfd_get_file_flags (abfd) & (EXEC_P | DYNAMIC)) != 0) | |
498 | error (_("\"%s\": not in object format."), filename); | |
499 | ||
500 | setup_sections_data.last_size = 0; | |
501 | setup_sections_data.last_section_first = abfd->sections; | |
502 | setup_sections_data.last_prot = -1; | |
503 | setup_sections_data.last_max_alignment = 1; | |
504 | bfd_map_over_sections (abfd, setup_sections, &setup_sections_data); | |
505 | setup_sections (abfd, NULL, &setup_sections_data); | |
506 | ||
507 | storage_needed = bfd_get_symtab_upper_bound (abfd); | |
508 | if (storage_needed < 0) | |
509 | error (_("Cannot read symbols of compiled module \"%s\": %s"), | |
510 | filename, bfd_errmsg (bfd_get_error ())); | |
511 | ||
512 | /* SYMFILE_VERBOSE is not passed even if FROM_TTY, user is not interested in | |
513 | "Reading symbols from ..." message for automatically generated file. */ | |
514 | objfile = symbol_file_add_from_bfd (abfd, filename, 0, NULL, 0, NULL); | |
515 | cleanups_free_objfile = make_cleanup_free_objfile (objfile); | |
516 | ||
517 | bmsym = lookup_minimal_symbol_text (GCC_FE_WRAPPER_FUNCTION, objfile); | |
518 | if (bmsym.minsym == NULL || MSYMBOL_TYPE (bmsym.minsym) == mst_file_text) | |
519 | error (_("Could not find symbol \"%s\" of compiled module \"%s\"."), | |
520 | GCC_FE_WRAPPER_FUNCTION, filename); | |
521 | func_addr = BMSYMBOL_VALUE_ADDRESS (bmsym); | |
522 | ||
523 | /* The memory may be later needed | |
524 | by bfd_generic_get_relocated_section_contents | |
525 | called from default_symfile_relocate. */ | |
526 | symbol_table = obstack_alloc (&objfile->objfile_obstack, storage_needed); | |
527 | number_of_symbols = bfd_canonicalize_symtab (abfd, symbol_table); | |
528 | if (number_of_symbols < 0) | |
529 | error (_("Cannot parse symbols of compiled module \"%s\": %s"), | |
530 | filename, bfd_errmsg (bfd_get_error ())); | |
531 | ||
532 | missing_symbols = 0; | |
533 | for (symp = symbol_table; symp < symbol_table + number_of_symbols; symp++) | |
534 | { | |
535 | asymbol *sym = *symp; | |
536 | ||
537 | if (sym->flags != 0) | |
538 | continue; | |
539 | if (compile_debug) | |
540 | fprintf_unfiltered (gdb_stdout, | |
541 | "lookup undefined ELF symbol \"%s\"\n", | |
542 | sym->name); | |
543 | sym->flags = BSF_GLOBAL; | |
544 | sym->section = bfd_abs_section_ptr; | |
545 | if (strcmp (sym->name, "_GLOBAL_OFFSET_TABLE_") == 0) | |
546 | { | |
547 | sym->value = 0; | |
548 | continue; | |
549 | } | |
550 | bmsym = lookup_minimal_symbol (sym->name, NULL, NULL); | |
551 | switch (bmsym.minsym == NULL | |
552 | ? mst_unknown : MSYMBOL_TYPE (bmsym.minsym)) | |
553 | { | |
554 | case mst_text: | |
555 | sym->value = BMSYMBOL_VALUE_ADDRESS (bmsym); | |
556 | break; | |
557 | default: | |
558 | warning (_("Could not find symbol \"%s\" " | |
559 | "for compiled module \"%s\"."), | |
560 | sym->name, filename); | |
561 | missing_symbols++; | |
562 | } | |
563 | } | |
564 | if (missing_symbols) | |
565 | error (_("%ld symbols were missing, cannot continue."), missing_symbols); | |
566 | ||
567 | bfd_map_over_sections (abfd, copy_sections, symbol_table); | |
568 | ||
569 | regs_type = get_regs_type (objfile); | |
570 | if (regs_type == NULL) | |
571 | regs_addr = 0; | |
572 | else | |
573 | { | |
574 | /* Use read-only non-executable memory protection. */ | |
575 | regs_addr = gdbarch_infcall_mmap (target_gdbarch (), | |
576 | TYPE_LENGTH (regs_type), | |
577 | GDB_MMAP_PROT_READ); | |
578 | gdb_assert (regs_addr != 0); | |
579 | store_regs (regs_type, regs_addr); | |
580 | } | |
581 | ||
582 | discard_cleanups (cleanups_free_objfile); | |
583 | do_cleanups (cleanups); | |
584 | ||
585 | retval = xmalloc (sizeof (*retval)); | |
586 | retval->objfile = objfile; | |
587 | retval->source_file = xstrdup (source_file); | |
588 | retval->func_addr = func_addr; | |
589 | retval->regs_addr = regs_addr; | |
590 | return retval; | |
591 | } |