Commit | Line | Data |
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bb2ec1b3 TT |
1 | /* Load module for 'compile' command. |
2 | ||
618f726f | 3 | Copyright (C) 2014-2016 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" | |
36de76f9 | 32 | #include "block.h" |
bb2ec1b3 TT |
33 | #include "arch-utils.h" |
34 | ||
7f361056 JK |
35 | /* Track inferior memory reserved by inferior mmap. */ |
36 | ||
37 | struct munmap_list | |
38 | { | |
39 | struct munmap_list *next; | |
40 | CORE_ADDR addr, size; | |
41 | }; | |
42 | ||
43 | /* Add inferior mmap memory range ADDR..ADDR+SIZE (exclusive) to list | |
44 | HEADP. *HEADP needs to be initialized to NULL. */ | |
45 | ||
46 | static void | |
47 | munmap_list_add (struct munmap_list **headp, CORE_ADDR addr, CORE_ADDR size) | |
48 | { | |
8d749320 | 49 | struct munmap_list *head_new = XNEW (struct munmap_list); |
7f361056 JK |
50 | |
51 | head_new->next = *headp; | |
52 | *headp = head_new; | |
53 | head_new->addr = addr; | |
54 | head_new->size = size; | |
55 | } | |
56 | ||
57 | /* Free list of inferior mmap memory ranges HEAD. HEAD is the first | |
58 | element of the list, it can be NULL. After calling this function | |
59 | HEAD pointer is invalid and the possible list needs to be | |
60 | reinitialized by caller to NULL. */ | |
61 | ||
62 | void | |
63 | munmap_list_free (struct munmap_list *head) | |
64 | { | |
65 | while (head) | |
66 | { | |
67 | struct munmap_list *todo = head; | |
68 | ||
69 | head = todo->next; | |
70 | gdbarch_infcall_munmap (target_gdbarch (), todo->addr, todo->size); | |
71 | xfree (todo); | |
72 | } | |
73 | } | |
74 | ||
75 | /* Stub for munmap_list_free suitable for make_cleanup. Contrary to | |
76 | munmap_list_free this function's parameter is a pointer to the first | |
77 | list element pointer. */ | |
78 | ||
79 | static void | |
80 | munmap_listp_free_cleanup (void *headp_voidp) | |
81 | { | |
9a3c8263 | 82 | struct munmap_list **headp = (struct munmap_list **) headp_voidp; |
7f361056 JK |
83 | |
84 | munmap_list_free (*headp); | |
85 | } | |
86 | ||
bb2ec1b3 TT |
87 | /* Helper data for setup_sections. */ |
88 | ||
89 | struct setup_sections_data | |
90 | { | |
91 | /* Size of all recent sections with matching LAST_PROT. */ | |
92 | CORE_ADDR last_size; | |
93 | ||
94 | /* First section matching LAST_PROT. */ | |
95 | asection *last_section_first; | |
96 | ||
97 | /* Memory protection like the prot parameter of gdbarch_infcall_mmap. */ | |
98 | unsigned last_prot; | |
99 | ||
100 | /* Maximum of alignments of all sections matching LAST_PROT. | |
101 | This value is always at least 1. This value is always a power of 2. */ | |
102 | CORE_ADDR last_max_alignment; | |
7f361056 JK |
103 | |
104 | /* List of inferior mmap ranges where setup_sections should add its | |
105 | next range. */ | |
106 | struct munmap_list **munmap_list_headp; | |
bb2ec1b3 TT |
107 | }; |
108 | ||
109 | /* Place all ABFD sections next to each other obeying all constraints. */ | |
110 | ||
111 | static void | |
112 | setup_sections (bfd *abfd, asection *sect, void *data_voidp) | |
113 | { | |
9a3c8263 | 114 | struct setup_sections_data *data = (struct setup_sections_data *) data_voidp; |
bb2ec1b3 TT |
115 | CORE_ADDR alignment; |
116 | unsigned prot; | |
117 | ||
118 | if (sect != NULL) | |
119 | { | |
120 | /* It is required by later bfd_get_relocated_section_contents. */ | |
121 | if (sect->output_section == NULL) | |
122 | sect->output_section = sect; | |
123 | ||
124 | if ((bfd_get_section_flags (abfd, sect) & SEC_ALLOC) == 0) | |
125 | return; | |
126 | ||
bb2b33b9 | 127 | /* Make the memory always readable. */ |
bb2ec1b3 TT |
128 | prot = GDB_MMAP_PROT_READ; |
129 | if ((bfd_get_section_flags (abfd, sect) & SEC_READONLY) == 0) | |
130 | prot |= GDB_MMAP_PROT_WRITE; | |
131 | if ((bfd_get_section_flags (abfd, sect) & SEC_CODE) != 0) | |
132 | prot |= GDB_MMAP_PROT_EXEC; | |
133 | ||
134 | if (compile_debug) | |
a4063588 | 135 | fprintf_unfiltered (gdb_stdlog, |
bb2ec1b3 TT |
136 | "module \"%s\" section \"%s\" size %s prot %u\n", |
137 | bfd_get_filename (abfd), | |
138 | bfd_get_section_name (abfd, sect), | |
139 | paddress (target_gdbarch (), | |
140 | bfd_get_section_size (sect)), | |
141 | prot); | |
142 | } | |
143 | else | |
144 | prot = -1; | |
145 | ||
146 | if (sect == NULL | |
147 | || (data->last_prot != prot && bfd_get_section_size (sect) != 0)) | |
148 | { | |
149 | CORE_ADDR addr; | |
150 | asection *sect_iter; | |
151 | ||
152 | if (data->last_size != 0) | |
153 | { | |
154 | addr = gdbarch_infcall_mmap (target_gdbarch (), data->last_size, | |
155 | data->last_prot); | |
7f361056 | 156 | munmap_list_add (data->munmap_list_headp, addr, data->last_size); |
bb2ec1b3 | 157 | if (compile_debug) |
a4063588 | 158 | fprintf_unfiltered (gdb_stdlog, |
bb2ec1b3 TT |
159 | "allocated %s bytes at %s prot %u\n", |
160 | paddress (target_gdbarch (), data->last_size), | |
161 | paddress (target_gdbarch (), addr), | |
162 | data->last_prot); | |
163 | } | |
164 | else | |
165 | addr = 0; | |
166 | ||
167 | if ((addr & (data->last_max_alignment - 1)) != 0) | |
168 | error (_("Inferior compiled module address %s " | |
169 | "is not aligned to BFD required %s."), | |
170 | paddress (target_gdbarch (), addr), | |
171 | paddress (target_gdbarch (), data->last_max_alignment)); | |
172 | ||
173 | for (sect_iter = data->last_section_first; sect_iter != sect; | |
174 | sect_iter = sect_iter->next) | |
175 | if ((bfd_get_section_flags (abfd, sect_iter) & SEC_ALLOC) != 0) | |
176 | bfd_set_section_vma (abfd, sect_iter, | |
177 | addr + bfd_get_section_vma (abfd, sect_iter)); | |
178 | ||
179 | data->last_size = 0; | |
180 | data->last_section_first = sect; | |
181 | data->last_prot = prot; | |
182 | data->last_max_alignment = 1; | |
183 | } | |
184 | ||
185 | if (sect == NULL) | |
186 | return; | |
187 | ||
188 | alignment = ((CORE_ADDR) 1) << bfd_get_section_alignment (abfd, sect); | |
189 | data->last_max_alignment = max (data->last_max_alignment, alignment); | |
190 | ||
191 | data->last_size = (data->last_size + alignment - 1) & -alignment; | |
192 | ||
193 | bfd_set_section_vma (abfd, sect, data->last_size); | |
194 | ||
195 | data->last_size += bfd_get_section_size (sect); | |
196 | data->last_size = (data->last_size + alignment - 1) & -alignment; | |
197 | } | |
198 | ||
199 | /* Helper for link_callbacks callbacks vector. */ | |
200 | ||
201 | static bfd_boolean | |
202 | link_callbacks_multiple_definition (struct bfd_link_info *link_info, | |
203 | struct bfd_link_hash_entry *h, bfd *nbfd, | |
204 | asection *nsec, bfd_vma nval) | |
205 | { | |
206 | bfd *abfd = link_info->input_bfds; | |
207 | ||
208 | if (link_info->allow_multiple_definition) | |
209 | return TRUE; | |
8e8347b8 | 210 | warning (_("Compiled module \"%s\": multiple symbol definitions: %s"), |
bb2ec1b3 TT |
211 | bfd_get_filename (abfd), h->root.string); |
212 | return FALSE; | |
213 | } | |
214 | ||
215 | /* Helper for link_callbacks callbacks vector. */ | |
216 | ||
217 | static bfd_boolean | |
218 | link_callbacks_warning (struct bfd_link_info *link_info, const char *xwarning, | |
219 | const char *symbol, bfd *abfd, asection *section, | |
220 | bfd_vma address) | |
221 | { | |
8e8347b8 | 222 | warning (_("Compiled module \"%s\" section \"%s\": warning: %s"), |
bb2ec1b3 TT |
223 | bfd_get_filename (abfd), bfd_get_section_name (abfd, section), |
224 | xwarning); | |
225 | /* Maybe permit running as a module? */ | |
226 | return FALSE; | |
227 | } | |
228 | ||
229 | /* Helper for link_callbacks callbacks vector. */ | |
230 | ||
231 | static bfd_boolean | |
232 | link_callbacks_undefined_symbol (struct bfd_link_info *link_info, | |
233 | const char *name, bfd *abfd, asection *section, | |
234 | bfd_vma address, bfd_boolean is_fatal) | |
235 | { | |
236 | warning (_("Cannot resolve relocation to \"%s\" " | |
237 | "from compiled module \"%s\" section \"%s\"."), | |
238 | name, bfd_get_filename (abfd), bfd_get_section_name (abfd, section)); | |
239 | return FALSE; | |
240 | } | |
241 | ||
242 | /* Helper for link_callbacks callbacks vector. */ | |
243 | ||
244 | static bfd_boolean | |
245 | link_callbacks_reloc_overflow (struct bfd_link_info *link_info, | |
246 | struct bfd_link_hash_entry *entry, | |
247 | const char *name, const char *reloc_name, | |
248 | bfd_vma addend, bfd *abfd, asection *section, | |
249 | bfd_vma address) | |
250 | { | |
251 | /* TRUE is required for intra-module relocations. */ | |
252 | return TRUE; | |
253 | } | |
254 | ||
255 | /* Helper for link_callbacks callbacks vector. */ | |
256 | ||
257 | static bfd_boolean | |
258 | link_callbacks_reloc_dangerous (struct bfd_link_info *link_info, | |
259 | const char *message, bfd *abfd, | |
260 | asection *section, bfd_vma address) | |
261 | { | |
262 | warning (_("Compiled module \"%s\" section \"%s\": dangerous " | |
263 | "relocation: %s\n"), | |
264 | bfd_get_filename (abfd), bfd_get_section_name (abfd, section), | |
265 | message); | |
266 | return FALSE; | |
267 | } | |
268 | ||
269 | /* Helper for link_callbacks callbacks vector. */ | |
270 | ||
271 | static bfd_boolean | |
272 | link_callbacks_unattached_reloc (struct bfd_link_info *link_info, | |
273 | const char *name, bfd *abfd, asection *section, | |
274 | bfd_vma address) | |
275 | { | |
276 | warning (_("Compiled module \"%s\" section \"%s\": unattached " | |
277 | "relocation: %s\n"), | |
278 | bfd_get_filename (abfd), bfd_get_section_name (abfd, section), | |
279 | name); | |
280 | return FALSE; | |
281 | } | |
282 | ||
283 | /* Helper for link_callbacks callbacks vector. */ | |
284 | ||
77b64a49 PA |
285 | static void link_callbacks_einfo (const char *fmt, ...) |
286 | ATTRIBUTE_PRINTF (1, 2); | |
287 | ||
bb2ec1b3 TT |
288 | static void |
289 | link_callbacks_einfo (const char *fmt, ...) | |
290 | { | |
291 | struct cleanup *cleanups; | |
292 | va_list ap; | |
293 | char *str; | |
294 | ||
295 | va_start (ap, fmt); | |
296 | str = xstrvprintf (fmt, ap); | |
297 | va_end (ap); | |
298 | cleanups = make_cleanup (xfree, str); | |
299 | ||
8e8347b8 | 300 | warning (_("Compile module: warning: %s"), str); |
bb2ec1b3 TT |
301 | |
302 | do_cleanups (cleanups); | |
303 | } | |
304 | ||
305 | /* Helper for bfd_get_relocated_section_contents. | |
306 | Only these symbols are set by bfd_simple_get_relocated_section_contents | |
307 | but bfd/ seems to use even the NULL ones without checking them first. */ | |
308 | ||
309 | static const struct bfd_link_callbacks link_callbacks = | |
310 | { | |
311 | NULL, /* add_archive_element */ | |
312 | link_callbacks_multiple_definition, /* multiple_definition */ | |
313 | NULL, /* multiple_common */ | |
314 | NULL, /* add_to_set */ | |
315 | NULL, /* constructor */ | |
316 | link_callbacks_warning, /* warning */ | |
317 | link_callbacks_undefined_symbol, /* undefined_symbol */ | |
318 | link_callbacks_reloc_overflow, /* reloc_overflow */ | |
319 | link_callbacks_reloc_dangerous, /* reloc_dangerous */ | |
320 | link_callbacks_unattached_reloc, /* unattached_reloc */ | |
321 | NULL, /* notice */ | |
322 | link_callbacks_einfo, /* einfo */ | |
323 | NULL, /* info */ | |
324 | NULL, /* minfo */ | |
325 | NULL, /* override_segment_assignment */ | |
326 | }; | |
327 | ||
328 | struct link_hash_table_cleanup_data | |
329 | { | |
330 | bfd *abfd; | |
331 | bfd *link_next; | |
332 | }; | |
333 | ||
334 | /* Cleanup callback for struct bfd_link_info. */ | |
335 | ||
336 | static void | |
337 | link_hash_table_free (void *d) | |
338 | { | |
9a3c8263 SM |
339 | struct link_hash_table_cleanup_data *data |
340 | = (struct link_hash_table_cleanup_data *) d; | |
bb2ec1b3 TT |
341 | |
342 | if (data->abfd->is_linker_output) | |
343 | (*data->abfd->link.hash->hash_table_free) (data->abfd); | |
344 | data->abfd->link.next = data->link_next; | |
345 | } | |
346 | ||
347 | /* Relocate and store into inferior memory each section SECT of ABFD. */ | |
348 | ||
349 | static void | |
350 | copy_sections (bfd *abfd, asection *sect, void *data) | |
351 | { | |
9a3c8263 | 352 | asymbol **symbol_table = (asymbol **) data; |
bb2ec1b3 TT |
353 | bfd_byte *sect_data, *sect_data_got; |
354 | struct cleanup *cleanups; | |
355 | struct bfd_link_info link_info; | |
356 | struct bfd_link_order link_order; | |
357 | CORE_ADDR inferior_addr; | |
358 | struct link_hash_table_cleanup_data cleanup_data; | |
359 | ||
360 | if ((bfd_get_section_flags (abfd, sect) & (SEC_ALLOC | SEC_LOAD)) | |
361 | != (SEC_ALLOC | SEC_LOAD)) | |
362 | return; | |
363 | ||
364 | if (bfd_get_section_size (sect) == 0) | |
365 | return; | |
366 | ||
367 | /* Mostly a copy of bfd_simple_get_relocated_section_contents which GDB | |
368 | cannot use as it does not report relocations to undefined symbols. */ | |
369 | memset (&link_info, 0, sizeof (link_info)); | |
370 | link_info.output_bfd = abfd; | |
371 | link_info.input_bfds = abfd; | |
372 | link_info.input_bfds_tail = &abfd->link.next; | |
373 | ||
374 | cleanup_data.abfd = abfd; | |
375 | cleanup_data.link_next = abfd->link.next; | |
376 | ||
377 | abfd->link.next = NULL; | |
378 | link_info.hash = bfd_link_hash_table_create (abfd); | |
379 | ||
380 | cleanups = make_cleanup (link_hash_table_free, &cleanup_data); | |
381 | link_info.callbacks = &link_callbacks; | |
382 | ||
383 | memset (&link_order, 0, sizeof (link_order)); | |
384 | link_order.next = NULL; | |
385 | link_order.type = bfd_indirect_link_order; | |
386 | link_order.offset = 0; | |
387 | link_order.size = bfd_get_section_size (sect); | |
388 | link_order.u.indirect.section = sect; | |
389 | ||
224c3ddb | 390 | sect_data = (bfd_byte *) xmalloc (bfd_get_section_size (sect)); |
bb2ec1b3 TT |
391 | make_cleanup (xfree, sect_data); |
392 | ||
393 | sect_data_got = bfd_get_relocated_section_contents (abfd, &link_info, | |
394 | &link_order, sect_data, | |
395 | FALSE, symbol_table); | |
396 | ||
397 | if (sect_data_got == NULL) | |
398 | error (_("Cannot map compiled module \"%s\" section \"%s\": %s"), | |
399 | bfd_get_filename (abfd), bfd_get_section_name (abfd, sect), | |
400 | bfd_errmsg (bfd_get_error ())); | |
401 | gdb_assert (sect_data_got == sect_data); | |
402 | ||
403 | inferior_addr = bfd_get_section_vma (abfd, sect); | |
404 | if (0 != target_write_memory (inferior_addr, sect_data, | |
405 | bfd_get_section_size (sect))) | |
406 | error (_("Cannot write compiled module \"%s\" section \"%s\" " | |
407 | "to inferior memory range %s-%s."), | |
408 | bfd_get_filename (abfd), bfd_get_section_name (abfd, sect), | |
409 | paddress (target_gdbarch (), inferior_addr), | |
410 | paddress (target_gdbarch (), | |
411 | inferior_addr + bfd_get_section_size (sect))); | |
412 | ||
413 | do_cleanups (cleanups); | |
414 | } | |
415 | ||
36de76f9 JK |
416 | /* Fetch the type of COMPILE_I_EXPR_PTR_TYPE and COMPILE_I_EXPR_VAL |
417 | symbols in OBJFILE so we can calculate how much memory to allocate | |
418 | for the out parameter. This avoids needing a malloc in the generated | |
419 | code. Throw an error if anything fails. | |
420 | GDB first tries to compile the code with COMPILE_I_PRINT_ADDRESS_SCOPE. | |
421 | If it finds user tries to print an array type this function returns | |
422 | NULL. Caller will then regenerate the code with | |
423 | COMPILE_I_PRINT_VALUE_SCOPE, recompiles it again and finally runs it. | |
424 | This is because __auto_type array-to-pointer type conversion of | |
425 | COMPILE_I_EXPR_VAL which gets detected by COMPILE_I_EXPR_PTR_TYPE | |
426 | preserving the array type. */ | |
427 | ||
428 | static struct type * | |
429 | get_out_value_type (struct symbol *func_sym, struct objfile *objfile, | |
430 | enum compile_i_scope_types scope) | |
431 | { | |
d976bace JK |
432 | struct symbol *gdb_ptr_type_sym; |
433 | /* Initialize it just to avoid a GCC false warning. */ | |
434 | struct symbol *gdb_val_sym = NULL; | |
4d18dfad | 435 | struct type *gdb_ptr_type, *gdb_type_from_ptr, *gdb_type, *retval; |
d976bace JK |
436 | /* Initialize it just to avoid a GCC false warning. */ |
437 | const struct block *block = NULL; | |
36de76f9 JK |
438 | const struct blockvector *bv; |
439 | int nblocks = 0; | |
440 | int block_loop = 0; | |
441 | ||
442 | bv = SYMTAB_BLOCKVECTOR (func_sym->owner.symtab); | |
443 | nblocks = BLOCKVECTOR_NBLOCKS (bv); | |
444 | ||
445 | gdb_ptr_type_sym = NULL; | |
446 | for (block_loop = 0; block_loop < nblocks; block_loop++) | |
447 | { | |
d976bace | 448 | struct symbol *function = NULL; |
36de76f9 JK |
449 | const struct block *function_block; |
450 | ||
451 | block = BLOCKVECTOR_BLOCK (bv, block_loop); | |
452 | if (BLOCK_FUNCTION (block) != NULL) | |
453 | continue; | |
454 | gdb_val_sym = block_lookup_symbol (block, COMPILE_I_EXPR_VAL, VAR_DOMAIN); | |
455 | if (gdb_val_sym == NULL) | |
456 | continue; | |
457 | ||
458 | function_block = block; | |
459 | while (function_block != BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK) | |
460 | && function_block != BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK)) | |
461 | { | |
462 | function_block = BLOCK_SUPERBLOCK (function_block); | |
463 | function = BLOCK_FUNCTION (function_block); | |
464 | if (function != NULL) | |
465 | break; | |
466 | } | |
467 | if (function != NULL | |
468 | && (BLOCK_SUPERBLOCK (function_block) | |
469 | == BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK)) | |
470 | && (strcmp (SYMBOL_LINKAGE_NAME (function), GCC_FE_WRAPPER_FUNCTION) | |
471 | == 0)) | |
472 | break; | |
473 | } | |
474 | if (block_loop == nblocks) | |
475 | error (_("No \"%s\" symbol found"), COMPILE_I_EXPR_PTR_TYPE); | |
476 | ||
477 | gdb_type = SYMBOL_TYPE (gdb_val_sym); | |
f168693b | 478 | gdb_type = check_typedef (gdb_type); |
36de76f9 JK |
479 | |
480 | gdb_ptr_type_sym = block_lookup_symbol (block, COMPILE_I_EXPR_PTR_TYPE, | |
481 | VAR_DOMAIN); | |
482 | if (gdb_ptr_type_sym == NULL) | |
483 | error (_("No \"%s\" symbol found"), COMPILE_I_EXPR_PTR_TYPE); | |
484 | gdb_ptr_type = SYMBOL_TYPE (gdb_ptr_type_sym); | |
f168693b | 485 | gdb_ptr_type = check_typedef (gdb_ptr_type); |
36de76f9 JK |
486 | if (TYPE_CODE (gdb_ptr_type) != TYPE_CODE_PTR) |
487 | error (_("Type of \"%s\" is not a pointer"), COMPILE_I_EXPR_PTR_TYPE); | |
488 | gdb_type_from_ptr = TYPE_TARGET_TYPE (gdb_ptr_type); | |
489 | ||
490 | if (types_deeply_equal (gdb_type, gdb_type_from_ptr)) | |
491 | { | |
492 | if (scope != COMPILE_I_PRINT_ADDRESS_SCOPE) | |
493 | error (_("Expected address scope in compiled module \"%s\"."), | |
494 | objfile_name (objfile)); | |
495 | return gdb_type; | |
496 | } | |
497 | ||
498 | if (TYPE_CODE (gdb_type) != TYPE_CODE_PTR) | |
499 | error (_("Invalid type code %d of symbol \"%s\" " | |
500 | "in compiled module \"%s\"."), | |
501 | TYPE_CODE (gdb_type_from_ptr), COMPILE_I_EXPR_VAL, | |
502 | objfile_name (objfile)); | |
503 | ||
4d18dfad | 504 | retval = gdb_type_from_ptr; |
36de76f9 JK |
505 | switch (TYPE_CODE (gdb_type_from_ptr)) |
506 | { | |
507 | case TYPE_CODE_ARRAY: | |
508 | gdb_type_from_ptr = TYPE_TARGET_TYPE (gdb_type_from_ptr); | |
509 | break; | |
510 | case TYPE_CODE_FUNC: | |
511 | break; | |
512 | default: | |
513 | error (_("Invalid type code %d of symbol \"%s\" " | |
514 | "in compiled module \"%s\"."), | |
515 | TYPE_CODE (gdb_type_from_ptr), COMPILE_I_EXPR_PTR_TYPE, | |
516 | objfile_name (objfile)); | |
517 | } | |
518 | if (!types_deeply_equal (gdb_type_from_ptr, | |
519 | TYPE_TARGET_TYPE (gdb_type))) | |
520 | error (_("Referenced types do not match for symbols \"%s\" and \"%s\" " | |
521 | "in compiled module \"%s\"."), | |
522 | COMPILE_I_EXPR_PTR_TYPE, COMPILE_I_EXPR_VAL, | |
523 | objfile_name (objfile)); | |
524 | if (scope == COMPILE_I_PRINT_ADDRESS_SCOPE) | |
525 | return NULL; | |
4d18dfad | 526 | return retval; |
36de76f9 JK |
527 | } |
528 | ||
83d3415e JK |
529 | /* Fetch the type of first parameter of FUNC_SYM. |
530 | Return NULL if FUNC_SYM has no parameters. Throw an error otherwise. */ | |
bb2ec1b3 TT |
531 | |
532 | static struct type * | |
83d3415e | 533 | get_regs_type (struct symbol *func_sym, struct objfile *objfile) |
bb2ec1b3 | 534 | { |
83d3415e JK |
535 | struct type *func_type = SYMBOL_TYPE (func_sym); |
536 | struct type *regsp_type, *regs_type; | |
bb2ec1b3 TT |
537 | |
538 | /* No register parameter present. */ | |
539 | if (TYPE_NFIELDS (func_type) == 0) | |
540 | return NULL; | |
541 | ||
bb2ec1b3 TT |
542 | regsp_type = check_typedef (TYPE_FIELD_TYPE (func_type, 0)); |
543 | if (TYPE_CODE (regsp_type) != TYPE_CODE_PTR) | |
544 | error (_("Invalid type code %d of first parameter of function \"%s\" " | |
545 | "in compiled module \"%s\"."), | |
546 | TYPE_CODE (regsp_type), GCC_FE_WRAPPER_FUNCTION, | |
547 | objfile_name (objfile)); | |
548 | ||
549 | regs_type = check_typedef (TYPE_TARGET_TYPE (regsp_type)); | |
550 | if (TYPE_CODE (regs_type) != TYPE_CODE_STRUCT) | |
551 | error (_("Invalid type code %d of dereferenced first parameter " | |
552 | "of function \"%s\" in compiled module \"%s\"."), | |
553 | TYPE_CODE (regs_type), GCC_FE_WRAPPER_FUNCTION, | |
554 | objfile_name (objfile)); | |
555 | ||
556 | return regs_type; | |
557 | } | |
558 | ||
559 | /* Store all inferior registers required by REGS_TYPE to inferior memory | |
560 | starting at inferior address REGS_BASE. */ | |
561 | ||
562 | static void | |
563 | store_regs (struct type *regs_type, CORE_ADDR regs_base) | |
564 | { | |
565 | struct gdbarch *gdbarch = target_gdbarch (); | |
566 | struct regcache *regcache = get_thread_regcache (inferior_ptid); | |
567 | int fieldno; | |
568 | ||
569 | for (fieldno = 0; fieldno < TYPE_NFIELDS (regs_type); fieldno++) | |
570 | { | |
571 | const char *reg_name = TYPE_FIELD_NAME (regs_type, fieldno); | |
572 | ULONGEST reg_bitpos = TYPE_FIELD_BITPOS (regs_type, fieldno); | |
573 | ULONGEST reg_bitsize = TYPE_FIELD_BITSIZE (regs_type, fieldno); | |
574 | ULONGEST reg_offset; | |
575 | struct type *reg_type = check_typedef (TYPE_FIELD_TYPE (regs_type, | |
576 | fieldno)); | |
577 | ULONGEST reg_size = TYPE_LENGTH (reg_type); | |
578 | int regnum; | |
579 | struct value *regval; | |
580 | CORE_ADDR inferior_addr; | |
581 | ||
582 | if (strcmp (reg_name, COMPILE_I_SIMPLE_REGISTER_DUMMY) == 0) | |
583 | continue; | |
584 | ||
585 | if ((reg_bitpos % 8) != 0 || reg_bitsize != 0) | |
586 | error (_("Invalid register \"%s\" position %s bits or size %s bits"), | |
587 | reg_name, pulongest (reg_bitpos), pulongest (reg_bitsize)); | |
588 | reg_offset = reg_bitpos / 8; | |
589 | ||
590 | if (TYPE_CODE (reg_type) != TYPE_CODE_INT | |
591 | && TYPE_CODE (reg_type) != TYPE_CODE_PTR) | |
592 | error (_("Invalid register \"%s\" type code %d"), reg_name, | |
593 | TYPE_CODE (reg_type)); | |
594 | ||
595 | regnum = compile_register_name_demangle (gdbarch, reg_name); | |
596 | ||
597 | regval = value_from_register (reg_type, regnum, get_current_frame ()); | |
598 | if (value_optimized_out (regval)) | |
599 | error (_("Register \"%s\" is optimized out."), reg_name); | |
600 | if (!value_entirely_available (regval)) | |
601 | error (_("Register \"%s\" is not available."), reg_name); | |
602 | ||
603 | inferior_addr = regs_base + reg_offset; | |
604 | if (0 != target_write_memory (inferior_addr, value_contents (regval), | |
605 | reg_size)) | |
606 | error (_("Cannot write register \"%s\" to inferior memory at %s."), | |
607 | reg_name, paddress (gdbarch, inferior_addr)); | |
608 | } | |
609 | } | |
610 | ||
611 | /* Load OBJECT_FILE into inferior memory. Throw an error otherwise. | |
612 | Caller must fully dispose the return value by calling compile_object_run. | |
613 | SOURCE_FILE's copy is stored into the returned object. | |
614 | Caller should free both OBJECT_FILE and SOURCE_FILE immediatelly after this | |
36de76f9 JK |
615 | function returns. |
616 | Function returns NULL only for COMPILE_I_PRINT_ADDRESS_SCOPE when | |
617 | COMPILE_I_PRINT_VALUE_SCOPE should have been used instead. */ | |
bb2ec1b3 TT |
618 | |
619 | struct compile_module * | |
5c65b58a JK |
620 | compile_object_load (const char *object_file, const char *source_file, |
621 | enum compile_i_scope_types scope, void *scope_data) | |
bb2ec1b3 TT |
622 | { |
623 | struct cleanup *cleanups, *cleanups_free_objfile; | |
624 | bfd *abfd; | |
625 | struct setup_sections_data setup_sections_data; | |
36de76f9 | 626 | CORE_ADDR addr, regs_addr, out_value_addr = 0; |
83d3415e JK |
627 | struct symbol *func_sym; |
628 | struct type *func_type; | |
bb2ec1b3 TT |
629 | struct bound_minimal_symbol bmsym; |
630 | long storage_needed; | |
631 | asymbol **symbol_table, **symp; | |
632 | long number_of_symbols, missing_symbols; | |
633 | struct type *dptr_type = builtin_type (target_gdbarch ())->builtin_data_ptr; | |
634 | unsigned dptr_type_len = TYPE_LENGTH (dptr_type); | |
635 | struct compile_module *retval; | |
36de76f9 | 636 | struct type *regs_type, *out_value_type = NULL; |
bb2ec1b3 TT |
637 | char *filename, **matching; |
638 | struct objfile *objfile; | |
83d3415e JK |
639 | int expect_parameters; |
640 | struct type *expect_return_type; | |
7f361056 | 641 | struct munmap_list *munmap_list_head = NULL; |
bb2ec1b3 TT |
642 | |
643 | filename = tilde_expand (object_file); | |
644 | cleanups = make_cleanup (xfree, filename); | |
645 | ||
646 | abfd = gdb_bfd_open (filename, gnutarget, -1); | |
647 | if (abfd == NULL) | |
648 | error (_("\"%s\": could not open as compiled module: %s"), | |
649 | filename, bfd_errmsg (bfd_get_error ())); | |
650 | make_cleanup_bfd_unref (abfd); | |
651 | ||
652 | if (!bfd_check_format_matches (abfd, bfd_object, &matching)) | |
653 | error (_("\"%s\": not in loadable format: %s"), | |
654 | filename, gdb_bfd_errmsg (bfd_get_error (), matching)); | |
655 | ||
656 | if ((bfd_get_file_flags (abfd) & (EXEC_P | DYNAMIC)) != 0) | |
657 | error (_("\"%s\": not in object format."), filename); | |
658 | ||
659 | setup_sections_data.last_size = 0; | |
660 | setup_sections_data.last_section_first = abfd->sections; | |
661 | setup_sections_data.last_prot = -1; | |
662 | setup_sections_data.last_max_alignment = 1; | |
7f361056 JK |
663 | setup_sections_data.munmap_list_headp = &munmap_list_head; |
664 | make_cleanup (munmap_listp_free_cleanup, &munmap_list_head); | |
bb2ec1b3 TT |
665 | bfd_map_over_sections (abfd, setup_sections, &setup_sections_data); |
666 | setup_sections (abfd, NULL, &setup_sections_data); | |
667 | ||
668 | storage_needed = bfd_get_symtab_upper_bound (abfd); | |
669 | if (storage_needed < 0) | |
670 | error (_("Cannot read symbols of compiled module \"%s\": %s"), | |
671 | filename, bfd_errmsg (bfd_get_error ())); | |
672 | ||
673 | /* SYMFILE_VERBOSE is not passed even if FROM_TTY, user is not interested in | |
674 | "Reading symbols from ..." message for automatically generated file. */ | |
675 | objfile = symbol_file_add_from_bfd (abfd, filename, 0, NULL, 0, NULL); | |
676 | cleanups_free_objfile = make_cleanup_free_objfile (objfile); | |
677 | ||
83d3415e JK |
678 | func_sym = lookup_global_symbol_from_objfile (objfile, |
679 | GCC_FE_WRAPPER_FUNCTION, | |
d12307c1 | 680 | VAR_DOMAIN).symbol; |
83d3415e JK |
681 | if (func_sym == NULL) |
682 | error (_("Cannot find function \"%s\" in compiled module \"%s\"."), | |
683 | GCC_FE_WRAPPER_FUNCTION, objfile_name (objfile)); | |
684 | func_type = SYMBOL_TYPE (func_sym); | |
685 | if (TYPE_CODE (func_type) != TYPE_CODE_FUNC) | |
686 | error (_("Invalid type code %d of function \"%s\" in compiled " | |
687 | "module \"%s\"."), | |
688 | TYPE_CODE (func_type), GCC_FE_WRAPPER_FUNCTION, | |
689 | objfile_name (objfile)); | |
690 | ||
691 | switch (scope) | |
692 | { | |
693 | case COMPILE_I_SIMPLE_SCOPE: | |
694 | expect_parameters = 1; | |
695 | expect_return_type = builtin_type (target_gdbarch ())->builtin_void; | |
696 | break; | |
697 | case COMPILE_I_RAW_SCOPE: | |
698 | expect_parameters = 0; | |
699 | expect_return_type = builtin_type (target_gdbarch ())->builtin_void; | |
700 | break; | |
36de76f9 JK |
701 | case COMPILE_I_PRINT_ADDRESS_SCOPE: |
702 | case COMPILE_I_PRINT_VALUE_SCOPE: | |
703 | expect_parameters = 2; | |
704 | expect_return_type = builtin_type (target_gdbarch ())->builtin_void; | |
705 | break; | |
83d3415e JK |
706 | default: |
707 | internal_error (__FILE__, __LINE__, _("invalid scope %d"), scope); | |
708 | } | |
709 | if (TYPE_NFIELDS (func_type) != expect_parameters) | |
710 | error (_("Invalid %d parameters of function \"%s\" in compiled " | |
711 | "module \"%s\"."), | |
712 | TYPE_NFIELDS (func_type), GCC_FE_WRAPPER_FUNCTION, | |
713 | objfile_name (objfile)); | |
714 | if (!types_deeply_equal (expect_return_type, TYPE_TARGET_TYPE (func_type))) | |
715 | error (_("Invalid return type of function \"%s\" in compiled " | |
716 | "module \"%s\"."), | |
717 | GCC_FE_WRAPPER_FUNCTION, objfile_name (objfile)); | |
bb2ec1b3 TT |
718 | |
719 | /* The memory may be later needed | |
720 | by bfd_generic_get_relocated_section_contents | |
721 | called from default_symfile_relocate. */ | |
224c3ddb SM |
722 | symbol_table = (asymbol **) obstack_alloc (&objfile->objfile_obstack, |
723 | storage_needed); | |
bb2ec1b3 TT |
724 | number_of_symbols = bfd_canonicalize_symtab (abfd, symbol_table); |
725 | if (number_of_symbols < 0) | |
726 | error (_("Cannot parse symbols of compiled module \"%s\": %s"), | |
727 | filename, bfd_errmsg (bfd_get_error ())); | |
728 | ||
729 | missing_symbols = 0; | |
730 | for (symp = symbol_table; symp < symbol_table + number_of_symbols; symp++) | |
731 | { | |
732 | asymbol *sym = *symp; | |
733 | ||
734 | if (sym->flags != 0) | |
735 | continue; | |
bb2ec1b3 TT |
736 | sym->flags = BSF_GLOBAL; |
737 | sym->section = bfd_abs_section_ptr; | |
738 | if (strcmp (sym->name, "_GLOBAL_OFFSET_TABLE_") == 0) | |
739 | { | |
b0fd6b30 JK |
740 | if (compile_debug) |
741 | fprintf_unfiltered (gdb_stdlog, | |
742 | "ELF symbol \"%s\" relocated to zero\n", | |
743 | sym->name); | |
744 | ||
745 | /* It seems to be a GCC bug, with -mcmodel=large there should be no | |
746 | need for _GLOBAL_OFFSET_TABLE_. Together with -fPIE the data | |
747 | remain PC-relative even with _GLOBAL_OFFSET_TABLE_ as zero. */ | |
bb2ec1b3 TT |
748 | sym->value = 0; |
749 | continue; | |
750 | } | |
751 | bmsym = lookup_minimal_symbol (sym->name, NULL, NULL); | |
752 | switch (bmsym.minsym == NULL | |
753 | ? mst_unknown : MSYMBOL_TYPE (bmsym.minsym)) | |
754 | { | |
755 | case mst_text: | |
756 | sym->value = BMSYMBOL_VALUE_ADDRESS (bmsym); | |
b0fd6b30 JK |
757 | if (compile_debug) |
758 | fprintf_unfiltered (gdb_stdlog, | |
759 | "ELF mst_text symbol \"%s\" relocated to %s\n", | |
760 | sym->name, | |
761 | paddress (target_gdbarch (), sym->value)); | |
bb2ec1b3 | 762 | break; |
e26efa40 JK |
763 | case mst_text_gnu_ifunc: |
764 | sym->value = gnu_ifunc_resolve_addr (target_gdbarch (), | |
765 | BMSYMBOL_VALUE_ADDRESS (bmsym)); | |
b0fd6b30 JK |
766 | if (compile_debug) |
767 | fprintf_unfiltered (gdb_stdlog, | |
768 | "ELF mst_text_gnu_ifunc symbol \"%s\" " | |
769 | "relocated to %s\n", | |
770 | sym->name, | |
771 | paddress (target_gdbarch (), sym->value)); | |
e26efa40 | 772 | break; |
bb2ec1b3 TT |
773 | default: |
774 | warning (_("Could not find symbol \"%s\" " | |
775 | "for compiled module \"%s\"."), | |
776 | sym->name, filename); | |
777 | missing_symbols++; | |
778 | } | |
779 | } | |
780 | if (missing_symbols) | |
781 | error (_("%ld symbols were missing, cannot continue."), missing_symbols); | |
782 | ||
783 | bfd_map_over_sections (abfd, copy_sections, symbol_table); | |
784 | ||
83d3415e | 785 | regs_type = get_regs_type (func_sym, objfile); |
bb2ec1b3 TT |
786 | if (regs_type == NULL) |
787 | regs_addr = 0; | |
788 | else | |
789 | { | |
790 | /* Use read-only non-executable memory protection. */ | |
791 | regs_addr = gdbarch_infcall_mmap (target_gdbarch (), | |
792 | TYPE_LENGTH (regs_type), | |
793 | GDB_MMAP_PROT_READ); | |
794 | gdb_assert (regs_addr != 0); | |
7f361056 | 795 | munmap_list_add (&munmap_list_head, regs_addr, TYPE_LENGTH (regs_type)); |
b6de3f96 | 796 | if (compile_debug) |
a4063588 | 797 | fprintf_unfiltered (gdb_stdlog, |
b6de3f96 JK |
798 | "allocated %s bytes at %s for registers\n", |
799 | paddress (target_gdbarch (), | |
800 | TYPE_LENGTH (regs_type)), | |
801 | paddress (target_gdbarch (), regs_addr)); | |
bb2ec1b3 TT |
802 | store_regs (regs_type, regs_addr); |
803 | } | |
804 | ||
36de76f9 JK |
805 | if (scope == COMPILE_I_PRINT_ADDRESS_SCOPE |
806 | || scope == COMPILE_I_PRINT_VALUE_SCOPE) | |
807 | { | |
808 | out_value_type = get_out_value_type (func_sym, objfile, scope); | |
809 | if (out_value_type == NULL) | |
810 | { | |
811 | do_cleanups (cleanups); | |
812 | return NULL; | |
813 | } | |
814 | check_typedef (out_value_type); | |
815 | out_value_addr = gdbarch_infcall_mmap (target_gdbarch (), | |
816 | TYPE_LENGTH (out_value_type), | |
817 | (GDB_MMAP_PROT_READ | |
818 | | GDB_MMAP_PROT_WRITE)); | |
819 | gdb_assert (out_value_addr != 0); | |
7f361056 JK |
820 | munmap_list_add (&munmap_list_head, out_value_addr, |
821 | TYPE_LENGTH (out_value_type)); | |
36de76f9 | 822 | if (compile_debug) |
a4063588 | 823 | fprintf_unfiltered (gdb_stdlog, |
36de76f9 JK |
824 | "allocated %s bytes at %s for printed value\n", |
825 | paddress (target_gdbarch (), | |
826 | TYPE_LENGTH (out_value_type)), | |
827 | paddress (target_gdbarch (), out_value_addr)); | |
828 | } | |
829 | ||
bb2ec1b3 | 830 | discard_cleanups (cleanups_free_objfile); |
bb2ec1b3 | 831 | |
8d749320 | 832 | retval = XNEW (struct compile_module); |
bb2ec1b3 TT |
833 | retval->objfile = objfile; |
834 | retval->source_file = xstrdup (source_file); | |
83d3415e | 835 | retval->func_sym = func_sym; |
bb2ec1b3 | 836 | retval->regs_addr = regs_addr; |
5c65b58a JK |
837 | retval->scope = scope; |
838 | retval->scope_data = scope_data; | |
36de76f9 JK |
839 | retval->out_value_type = out_value_type; |
840 | retval->out_value_addr = out_value_addr; | |
7f361056 JK |
841 | |
842 | /* CLEANUPS will free MUNMAP_LIST_HEAD. */ | |
843 | retval->munmap_list_head = munmap_list_head; | |
844 | munmap_list_head = NULL; | |
845 | ||
846 | do_cleanups (cleanups); | |
847 | ||
bb2ec1b3 TT |
848 | return retval; |
849 | } |