Commit | Line | Data |
---|---|---|
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 | ||
227 | static void | |
228 | link_callbacks_einfo (const char *fmt, ...) | |
229 | { | |
230 | struct cleanup *cleanups; | |
231 | va_list ap; | |
232 | char *str; | |
233 | ||
234 | va_start (ap, fmt); | |
235 | str = xstrvprintf (fmt, ap); | |
236 | va_end (ap); | |
237 | cleanups = make_cleanup (xfree, str); | |
238 | ||
8e8347b8 | 239 | warning (_("Compile module: warning: %s"), str); |
bb2ec1b3 TT |
240 | |
241 | do_cleanups (cleanups); | |
242 | } | |
243 | ||
244 | /* Helper for bfd_get_relocated_section_contents. | |
245 | Only these symbols are set by bfd_simple_get_relocated_section_contents | |
246 | but bfd/ seems to use even the NULL ones without checking them first. */ | |
247 | ||
248 | static const struct bfd_link_callbacks link_callbacks = | |
249 | { | |
250 | NULL, /* add_archive_element */ | |
251 | link_callbacks_multiple_definition, /* multiple_definition */ | |
252 | NULL, /* multiple_common */ | |
253 | NULL, /* add_to_set */ | |
254 | NULL, /* constructor */ | |
255 | link_callbacks_warning, /* warning */ | |
256 | link_callbacks_undefined_symbol, /* undefined_symbol */ | |
257 | link_callbacks_reloc_overflow, /* reloc_overflow */ | |
258 | link_callbacks_reloc_dangerous, /* reloc_dangerous */ | |
259 | link_callbacks_unattached_reloc, /* unattached_reloc */ | |
260 | NULL, /* notice */ | |
261 | link_callbacks_einfo, /* einfo */ | |
262 | NULL, /* info */ | |
263 | NULL, /* minfo */ | |
264 | NULL, /* override_segment_assignment */ | |
265 | }; | |
266 | ||
267 | struct link_hash_table_cleanup_data | |
268 | { | |
269 | bfd *abfd; | |
270 | bfd *link_next; | |
271 | }; | |
272 | ||
273 | /* Cleanup callback for struct bfd_link_info. */ | |
274 | ||
275 | static void | |
276 | link_hash_table_free (void *d) | |
277 | { | |
278 | struct link_hash_table_cleanup_data *data = d; | |
279 | ||
280 | if (data->abfd->is_linker_output) | |
281 | (*data->abfd->link.hash->hash_table_free) (data->abfd); | |
282 | data->abfd->link.next = data->link_next; | |
283 | } | |
284 | ||
285 | /* Relocate and store into inferior memory each section SECT of ABFD. */ | |
286 | ||
287 | static void | |
288 | copy_sections (bfd *abfd, asection *sect, void *data) | |
289 | { | |
290 | asymbol **symbol_table = data; | |
291 | bfd_byte *sect_data, *sect_data_got; | |
292 | struct cleanup *cleanups; | |
293 | struct bfd_link_info link_info; | |
294 | struct bfd_link_order link_order; | |
295 | CORE_ADDR inferior_addr; | |
296 | struct link_hash_table_cleanup_data cleanup_data; | |
297 | ||
298 | if ((bfd_get_section_flags (abfd, sect) & (SEC_ALLOC | SEC_LOAD)) | |
299 | != (SEC_ALLOC | SEC_LOAD)) | |
300 | return; | |
301 | ||
302 | if (bfd_get_section_size (sect) == 0) | |
303 | return; | |
304 | ||
305 | /* Mostly a copy of bfd_simple_get_relocated_section_contents which GDB | |
306 | cannot use as it does not report relocations to undefined symbols. */ | |
307 | memset (&link_info, 0, sizeof (link_info)); | |
308 | link_info.output_bfd = abfd; | |
309 | link_info.input_bfds = abfd; | |
310 | link_info.input_bfds_tail = &abfd->link.next; | |
311 | ||
312 | cleanup_data.abfd = abfd; | |
313 | cleanup_data.link_next = abfd->link.next; | |
314 | ||
315 | abfd->link.next = NULL; | |
316 | link_info.hash = bfd_link_hash_table_create (abfd); | |
317 | ||
318 | cleanups = make_cleanup (link_hash_table_free, &cleanup_data); | |
319 | link_info.callbacks = &link_callbacks; | |
320 | ||
321 | memset (&link_order, 0, sizeof (link_order)); | |
322 | link_order.next = NULL; | |
323 | link_order.type = bfd_indirect_link_order; | |
324 | link_order.offset = 0; | |
325 | link_order.size = bfd_get_section_size (sect); | |
326 | link_order.u.indirect.section = sect; | |
327 | ||
328 | sect_data = xmalloc (bfd_get_section_size (sect)); | |
329 | make_cleanup (xfree, sect_data); | |
330 | ||
331 | sect_data_got = bfd_get_relocated_section_contents (abfd, &link_info, | |
332 | &link_order, sect_data, | |
333 | FALSE, symbol_table); | |
334 | ||
335 | if (sect_data_got == NULL) | |
336 | error (_("Cannot map compiled module \"%s\" section \"%s\": %s"), | |
337 | bfd_get_filename (abfd), bfd_get_section_name (abfd, sect), | |
338 | bfd_errmsg (bfd_get_error ())); | |
339 | gdb_assert (sect_data_got == sect_data); | |
340 | ||
341 | inferior_addr = bfd_get_section_vma (abfd, sect); | |
342 | if (0 != target_write_memory (inferior_addr, sect_data, | |
343 | bfd_get_section_size (sect))) | |
344 | error (_("Cannot write compiled module \"%s\" section \"%s\" " | |
345 | "to inferior memory range %s-%s."), | |
346 | bfd_get_filename (abfd), bfd_get_section_name (abfd, sect), | |
347 | paddress (target_gdbarch (), inferior_addr), | |
348 | paddress (target_gdbarch (), | |
349 | inferior_addr + bfd_get_section_size (sect))); | |
350 | ||
351 | do_cleanups (cleanups); | |
352 | } | |
353 | ||
354 | /* Fetch the type of first parameter of GCC_FE_WRAPPER_FUNCTION. | |
355 | Return NULL if GCC_FE_WRAPPER_FUNCTION has no parameters. | |
356 | Throw an error otherwise. */ | |
357 | ||
358 | static struct type * | |
359 | get_regs_type (struct objfile *objfile) | |
360 | { | |
361 | struct symbol *func_sym; | |
362 | struct type *func_type, *regsp_type, *regs_type; | |
363 | ||
364 | func_sym = lookup_global_symbol_from_objfile (objfile, | |
365 | GCC_FE_WRAPPER_FUNCTION, | |
366 | VAR_DOMAIN); | |
367 | if (func_sym == NULL) | |
368 | error (_("Cannot find function \"%s\" in compiled module \"%s\"."), | |
369 | GCC_FE_WRAPPER_FUNCTION, objfile_name (objfile)); | |
370 | ||
371 | func_type = SYMBOL_TYPE (func_sym); | |
372 | if (TYPE_CODE (func_type) != TYPE_CODE_FUNC) | |
373 | error (_("Invalid type code %d of function \"%s\" in compiled " | |
374 | "module \"%s\"."), | |
375 | TYPE_CODE (func_type), GCC_FE_WRAPPER_FUNCTION, | |
376 | objfile_name (objfile)); | |
377 | ||
378 | /* No register parameter present. */ | |
379 | if (TYPE_NFIELDS (func_type) == 0) | |
380 | return NULL; | |
381 | ||
382 | if (TYPE_NFIELDS (func_type) != 1) | |
383 | error (_("Invalid %d parameters of function \"%s\" in compiled " | |
384 | "module \"%s\"."), | |
385 | TYPE_NFIELDS (func_type), GCC_FE_WRAPPER_FUNCTION, | |
386 | objfile_name (objfile)); | |
387 | ||
388 | regsp_type = check_typedef (TYPE_FIELD_TYPE (func_type, 0)); | |
389 | if (TYPE_CODE (regsp_type) != TYPE_CODE_PTR) | |
390 | error (_("Invalid type code %d of first parameter of function \"%s\" " | |
391 | "in compiled module \"%s\"."), | |
392 | TYPE_CODE (regsp_type), GCC_FE_WRAPPER_FUNCTION, | |
393 | objfile_name (objfile)); | |
394 | ||
395 | regs_type = check_typedef (TYPE_TARGET_TYPE (regsp_type)); | |
396 | if (TYPE_CODE (regs_type) != TYPE_CODE_STRUCT) | |
397 | error (_("Invalid type code %d of dereferenced first parameter " | |
398 | "of function \"%s\" in compiled module \"%s\"."), | |
399 | TYPE_CODE (regs_type), GCC_FE_WRAPPER_FUNCTION, | |
400 | objfile_name (objfile)); | |
401 | ||
402 | return regs_type; | |
403 | } | |
404 | ||
405 | /* Store all inferior registers required by REGS_TYPE to inferior memory | |
406 | starting at inferior address REGS_BASE. */ | |
407 | ||
408 | static void | |
409 | store_regs (struct type *regs_type, CORE_ADDR regs_base) | |
410 | { | |
411 | struct gdbarch *gdbarch = target_gdbarch (); | |
412 | struct regcache *regcache = get_thread_regcache (inferior_ptid); | |
413 | int fieldno; | |
414 | ||
415 | for (fieldno = 0; fieldno < TYPE_NFIELDS (regs_type); fieldno++) | |
416 | { | |
417 | const char *reg_name = TYPE_FIELD_NAME (regs_type, fieldno); | |
418 | ULONGEST reg_bitpos = TYPE_FIELD_BITPOS (regs_type, fieldno); | |
419 | ULONGEST reg_bitsize = TYPE_FIELD_BITSIZE (regs_type, fieldno); | |
420 | ULONGEST reg_offset; | |
421 | struct type *reg_type = check_typedef (TYPE_FIELD_TYPE (regs_type, | |
422 | fieldno)); | |
423 | ULONGEST reg_size = TYPE_LENGTH (reg_type); | |
424 | int regnum; | |
425 | struct value *regval; | |
426 | CORE_ADDR inferior_addr; | |
427 | ||
428 | if (strcmp (reg_name, COMPILE_I_SIMPLE_REGISTER_DUMMY) == 0) | |
429 | continue; | |
430 | ||
431 | if ((reg_bitpos % 8) != 0 || reg_bitsize != 0) | |
432 | error (_("Invalid register \"%s\" position %s bits or size %s bits"), | |
433 | reg_name, pulongest (reg_bitpos), pulongest (reg_bitsize)); | |
434 | reg_offset = reg_bitpos / 8; | |
435 | ||
436 | if (TYPE_CODE (reg_type) != TYPE_CODE_INT | |
437 | && TYPE_CODE (reg_type) != TYPE_CODE_PTR) | |
438 | error (_("Invalid register \"%s\" type code %d"), reg_name, | |
439 | TYPE_CODE (reg_type)); | |
440 | ||
441 | regnum = compile_register_name_demangle (gdbarch, reg_name); | |
442 | ||
443 | regval = value_from_register (reg_type, regnum, get_current_frame ()); | |
444 | if (value_optimized_out (regval)) | |
445 | error (_("Register \"%s\" is optimized out."), reg_name); | |
446 | if (!value_entirely_available (regval)) | |
447 | error (_("Register \"%s\" is not available."), reg_name); | |
448 | ||
449 | inferior_addr = regs_base + reg_offset; | |
450 | if (0 != target_write_memory (inferior_addr, value_contents (regval), | |
451 | reg_size)) | |
452 | error (_("Cannot write register \"%s\" to inferior memory at %s."), | |
453 | reg_name, paddress (gdbarch, inferior_addr)); | |
454 | } | |
455 | } | |
456 | ||
457 | /* Load OBJECT_FILE into inferior memory. Throw an error otherwise. | |
458 | Caller must fully dispose the return value by calling compile_object_run. | |
459 | SOURCE_FILE's copy is stored into the returned object. | |
460 | Caller should free both OBJECT_FILE and SOURCE_FILE immediatelly after this | |
461 | function returns. */ | |
462 | ||
463 | struct compile_module * | |
464 | compile_object_load (const char *object_file, const char *source_file) | |
465 | { | |
466 | struct cleanup *cleanups, *cleanups_free_objfile; | |
467 | bfd *abfd; | |
468 | struct setup_sections_data setup_sections_data; | |
469 | CORE_ADDR addr, func_addr, regs_addr; | |
470 | struct bound_minimal_symbol bmsym; | |
471 | long storage_needed; | |
472 | asymbol **symbol_table, **symp; | |
473 | long number_of_symbols, missing_symbols; | |
474 | struct type *dptr_type = builtin_type (target_gdbarch ())->builtin_data_ptr; | |
475 | unsigned dptr_type_len = TYPE_LENGTH (dptr_type); | |
476 | struct compile_module *retval; | |
477 | struct type *regs_type; | |
478 | char *filename, **matching; | |
479 | struct objfile *objfile; | |
480 | ||
481 | filename = tilde_expand (object_file); | |
482 | cleanups = make_cleanup (xfree, filename); | |
483 | ||
484 | abfd = gdb_bfd_open (filename, gnutarget, -1); | |
485 | if (abfd == NULL) | |
486 | error (_("\"%s\": could not open as compiled module: %s"), | |
487 | filename, bfd_errmsg (bfd_get_error ())); | |
488 | make_cleanup_bfd_unref (abfd); | |
489 | ||
490 | if (!bfd_check_format_matches (abfd, bfd_object, &matching)) | |
491 | error (_("\"%s\": not in loadable format: %s"), | |
492 | filename, gdb_bfd_errmsg (bfd_get_error (), matching)); | |
493 | ||
494 | if ((bfd_get_file_flags (abfd) & (EXEC_P | DYNAMIC)) != 0) | |
495 | error (_("\"%s\": not in object format."), filename); | |
496 | ||
497 | setup_sections_data.last_size = 0; | |
498 | setup_sections_data.last_section_first = abfd->sections; | |
499 | setup_sections_data.last_prot = -1; | |
500 | setup_sections_data.last_max_alignment = 1; | |
501 | bfd_map_over_sections (abfd, setup_sections, &setup_sections_data); | |
502 | setup_sections (abfd, NULL, &setup_sections_data); | |
503 | ||
504 | storage_needed = bfd_get_symtab_upper_bound (abfd); | |
505 | if (storage_needed < 0) | |
506 | error (_("Cannot read symbols of compiled module \"%s\": %s"), | |
507 | filename, bfd_errmsg (bfd_get_error ())); | |
508 | ||
509 | /* SYMFILE_VERBOSE is not passed even if FROM_TTY, user is not interested in | |
510 | "Reading symbols from ..." message for automatically generated file. */ | |
511 | objfile = symbol_file_add_from_bfd (abfd, filename, 0, NULL, 0, NULL); | |
512 | cleanups_free_objfile = make_cleanup_free_objfile (objfile); | |
513 | ||
514 | bmsym = lookup_minimal_symbol_text (GCC_FE_WRAPPER_FUNCTION, objfile); | |
515 | if (bmsym.minsym == NULL || MSYMBOL_TYPE (bmsym.minsym) == mst_file_text) | |
516 | error (_("Could not find symbol \"%s\" of compiled module \"%s\"."), | |
517 | GCC_FE_WRAPPER_FUNCTION, filename); | |
518 | func_addr = BMSYMBOL_VALUE_ADDRESS (bmsym); | |
519 | ||
520 | /* The memory may be later needed | |
521 | by bfd_generic_get_relocated_section_contents | |
522 | called from default_symfile_relocate. */ | |
523 | symbol_table = obstack_alloc (&objfile->objfile_obstack, storage_needed); | |
524 | number_of_symbols = bfd_canonicalize_symtab (abfd, symbol_table); | |
525 | if (number_of_symbols < 0) | |
526 | error (_("Cannot parse symbols of compiled module \"%s\": %s"), | |
527 | filename, bfd_errmsg (bfd_get_error ())); | |
528 | ||
529 | missing_symbols = 0; | |
530 | for (symp = symbol_table; symp < symbol_table + number_of_symbols; symp++) | |
531 | { | |
532 | asymbol *sym = *symp; | |
533 | ||
534 | if (sym->flags != 0) | |
535 | continue; | |
536 | if (compile_debug) | |
537 | fprintf_unfiltered (gdb_stdout, | |
538 | "lookup undefined ELF symbol \"%s\"\n", | |
539 | sym->name); | |
540 | sym->flags = BSF_GLOBAL; | |
541 | sym->section = bfd_abs_section_ptr; | |
542 | if (strcmp (sym->name, "_GLOBAL_OFFSET_TABLE_") == 0) | |
543 | { | |
544 | sym->value = 0; | |
545 | continue; | |
546 | } | |
547 | bmsym = lookup_minimal_symbol (sym->name, NULL, NULL); | |
548 | switch (bmsym.minsym == NULL | |
549 | ? mst_unknown : MSYMBOL_TYPE (bmsym.minsym)) | |
550 | { | |
551 | case mst_text: | |
552 | sym->value = BMSYMBOL_VALUE_ADDRESS (bmsym); | |
553 | break; | |
554 | default: | |
555 | warning (_("Could not find symbol \"%s\" " | |
556 | "for compiled module \"%s\"."), | |
557 | sym->name, filename); | |
558 | missing_symbols++; | |
559 | } | |
560 | } | |
561 | if (missing_symbols) | |
562 | error (_("%ld symbols were missing, cannot continue."), missing_symbols); | |
563 | ||
564 | bfd_map_over_sections (abfd, copy_sections, symbol_table); | |
565 | ||
566 | regs_type = get_regs_type (objfile); | |
567 | if (regs_type == NULL) | |
568 | regs_addr = 0; | |
569 | else | |
570 | { | |
571 | /* Use read-only non-executable memory protection. */ | |
572 | regs_addr = gdbarch_infcall_mmap (target_gdbarch (), | |
573 | TYPE_LENGTH (regs_type), | |
574 | GDB_MMAP_PROT_READ); | |
575 | gdb_assert (regs_addr != 0); | |
576 | store_regs (regs_type, regs_addr); | |
577 | } | |
578 | ||
579 | discard_cleanups (cleanups_free_objfile); | |
580 | do_cleanups (cleanups); | |
581 | ||
582 | retval = xmalloc (sizeof (*retval)); | |
583 | retval->objfile = objfile; | |
584 | retval->source_file = xstrdup (source_file); | |
585 | retval->func_addr = func_addr; | |
586 | retval->regs_addr = regs_addr; | |
587 | return retval; | |
588 | } |