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