Commit | Line | Data |
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bb2ec1b3 TT |
1 | /* Load module for 'compile' command. |
2 | ||
61baf725 | 3 | Copyright (C) 2014-2017 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 | 33 | #include "arch-utils.h" |
325fac50 | 34 | #include <algorithm> |
bb2ec1b3 | 35 | |
7f361056 JK |
36 | /* Track inferior memory reserved by inferior mmap. */ |
37 | ||
38 | struct munmap_list | |
39 | { | |
40 | struct munmap_list *next; | |
41 | CORE_ADDR addr, size; | |
42 | }; | |
43 | ||
44 | /* Add inferior mmap memory range ADDR..ADDR+SIZE (exclusive) to list | |
45 | HEADP. *HEADP needs to be initialized to NULL. */ | |
46 | ||
47 | static void | |
48 | munmap_list_add (struct munmap_list **headp, CORE_ADDR addr, CORE_ADDR size) | |
49 | { | |
8d749320 | 50 | struct munmap_list *head_new = XNEW (struct munmap_list); |
7f361056 JK |
51 | |
52 | head_new->next = *headp; | |
53 | *headp = head_new; | |
54 | head_new->addr = addr; | |
55 | head_new->size = size; | |
56 | } | |
57 | ||
58 | /* Free list of inferior mmap memory ranges HEAD. HEAD is the first | |
59 | element of the list, it can be NULL. After calling this function | |
60 | HEAD pointer is invalid and the possible list needs to be | |
61 | reinitialized by caller to NULL. */ | |
62 | ||
63 | void | |
64 | munmap_list_free (struct munmap_list *head) | |
65 | { | |
66 | while (head) | |
67 | { | |
68 | struct munmap_list *todo = head; | |
69 | ||
70 | head = todo->next; | |
71 | gdbarch_infcall_munmap (target_gdbarch (), todo->addr, todo->size); | |
72 | xfree (todo); | |
73 | } | |
74 | } | |
75 | ||
76 | /* Stub for munmap_list_free suitable for make_cleanup. Contrary to | |
77 | munmap_list_free this function's parameter is a pointer to the first | |
78 | list element pointer. */ | |
79 | ||
80 | static void | |
81 | munmap_listp_free_cleanup (void *headp_voidp) | |
82 | { | |
9a3c8263 | 83 | struct munmap_list **headp = (struct munmap_list **) headp_voidp; |
7f361056 JK |
84 | |
85 | munmap_list_free (*headp); | |
86 | } | |
87 | ||
bb2ec1b3 TT |
88 | /* Helper data for setup_sections. */ |
89 | ||
90 | struct setup_sections_data | |
91 | { | |
92 | /* Size of all recent sections with matching LAST_PROT. */ | |
93 | CORE_ADDR last_size; | |
94 | ||
95 | /* First section matching LAST_PROT. */ | |
96 | asection *last_section_first; | |
97 | ||
98 | /* Memory protection like the prot parameter of gdbarch_infcall_mmap. */ | |
99 | unsigned last_prot; | |
100 | ||
101 | /* Maximum of alignments of all sections matching LAST_PROT. | |
102 | This value is always at least 1. This value is always a power of 2. */ | |
103 | CORE_ADDR last_max_alignment; | |
7f361056 JK |
104 | |
105 | /* List of inferior mmap ranges where setup_sections should add its | |
106 | next range. */ | |
107 | struct munmap_list **munmap_list_headp; | |
bb2ec1b3 TT |
108 | }; |
109 | ||
110 | /* Place all ABFD sections next to each other obeying all constraints. */ | |
111 | ||
112 | static void | |
113 | setup_sections (bfd *abfd, asection *sect, void *data_voidp) | |
114 | { | |
9a3c8263 | 115 | struct setup_sections_data *data = (struct setup_sections_data *) data_voidp; |
bb2ec1b3 TT |
116 | CORE_ADDR alignment; |
117 | unsigned prot; | |
118 | ||
119 | if (sect != NULL) | |
120 | { | |
121 | /* It is required by later bfd_get_relocated_section_contents. */ | |
122 | if (sect->output_section == NULL) | |
123 | sect->output_section = sect; | |
124 | ||
125 | if ((bfd_get_section_flags (abfd, sect) & SEC_ALLOC) == 0) | |
126 | return; | |
127 | ||
bb2b33b9 | 128 | /* Make the memory always readable. */ |
bb2ec1b3 TT |
129 | prot = GDB_MMAP_PROT_READ; |
130 | if ((bfd_get_section_flags (abfd, sect) & SEC_READONLY) == 0) | |
131 | prot |= GDB_MMAP_PROT_WRITE; | |
132 | if ((bfd_get_section_flags (abfd, sect) & SEC_CODE) != 0) | |
133 | prot |= GDB_MMAP_PROT_EXEC; | |
134 | ||
135 | if (compile_debug) | |
a4063588 | 136 | fprintf_unfiltered (gdb_stdlog, |
bb2ec1b3 TT |
137 | "module \"%s\" section \"%s\" size %s prot %u\n", |
138 | bfd_get_filename (abfd), | |
139 | bfd_get_section_name (abfd, sect), | |
140 | paddress (target_gdbarch (), | |
141 | bfd_get_section_size (sect)), | |
142 | prot); | |
143 | } | |
144 | else | |
145 | prot = -1; | |
146 | ||
147 | if (sect == NULL | |
148 | || (data->last_prot != prot && bfd_get_section_size (sect) != 0)) | |
149 | { | |
150 | CORE_ADDR addr; | |
151 | asection *sect_iter; | |
152 | ||
153 | if (data->last_size != 0) | |
154 | { | |
155 | addr = gdbarch_infcall_mmap (target_gdbarch (), data->last_size, | |
156 | data->last_prot); | |
7f361056 | 157 | munmap_list_add (data->munmap_list_headp, addr, data->last_size); |
bb2ec1b3 | 158 | if (compile_debug) |
a4063588 | 159 | fprintf_unfiltered (gdb_stdlog, |
bb2ec1b3 TT |
160 | "allocated %s bytes at %s prot %u\n", |
161 | paddress (target_gdbarch (), data->last_size), | |
162 | paddress (target_gdbarch (), addr), | |
163 | data->last_prot); | |
164 | } | |
165 | else | |
166 | addr = 0; | |
167 | ||
168 | if ((addr & (data->last_max_alignment - 1)) != 0) | |
169 | error (_("Inferior compiled module address %s " | |
170 | "is not aligned to BFD required %s."), | |
171 | paddress (target_gdbarch (), addr), | |
172 | paddress (target_gdbarch (), data->last_max_alignment)); | |
173 | ||
174 | for (sect_iter = data->last_section_first; sect_iter != sect; | |
175 | sect_iter = sect_iter->next) | |
176 | if ((bfd_get_section_flags (abfd, sect_iter) & SEC_ALLOC) != 0) | |
177 | bfd_set_section_vma (abfd, sect_iter, | |
178 | addr + bfd_get_section_vma (abfd, sect_iter)); | |
179 | ||
180 | data->last_size = 0; | |
181 | data->last_section_first = sect; | |
182 | data->last_prot = prot; | |
183 | data->last_max_alignment = 1; | |
184 | } | |
185 | ||
186 | if (sect == NULL) | |
187 | return; | |
188 | ||
189 | alignment = ((CORE_ADDR) 1) << bfd_get_section_alignment (abfd, sect); | |
325fac50 | 190 | data->last_max_alignment = std::max (data->last_max_alignment, alignment); |
bb2ec1b3 TT |
191 | |
192 | data->last_size = (data->last_size + alignment - 1) & -alignment; | |
193 | ||
194 | bfd_set_section_vma (abfd, sect, data->last_size); | |
195 | ||
196 | data->last_size += bfd_get_section_size (sect); | |
197 | data->last_size = (data->last_size + alignment - 1) & -alignment; | |
198 | } | |
199 | ||
200 | /* Helper for link_callbacks callbacks vector. */ | |
201 | ||
1a72702b | 202 | static void |
bb2ec1b3 TT |
203 | link_callbacks_multiple_definition (struct bfd_link_info *link_info, |
204 | struct bfd_link_hash_entry *h, bfd *nbfd, | |
205 | asection *nsec, bfd_vma nval) | |
206 | { | |
207 | bfd *abfd = link_info->input_bfds; | |
208 | ||
209 | if (link_info->allow_multiple_definition) | |
1a72702b | 210 | return; |
8e8347b8 | 211 | warning (_("Compiled module \"%s\": multiple symbol definitions: %s"), |
bb2ec1b3 | 212 | bfd_get_filename (abfd), h->root.string); |
bb2ec1b3 TT |
213 | } |
214 | ||
215 | /* Helper for link_callbacks callbacks vector. */ | |
216 | ||
1a72702b | 217 | static void |
bb2ec1b3 TT |
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); | |
bb2ec1b3 TT |
225 | } |
226 | ||
227 | /* Helper for link_callbacks callbacks vector. */ | |
228 | ||
1a72702b | 229 | static void |
bb2ec1b3 TT |
230 | link_callbacks_undefined_symbol (struct bfd_link_info *link_info, |
231 | const char *name, bfd *abfd, asection *section, | |
232 | bfd_vma address, bfd_boolean is_fatal) | |
233 | { | |
234 | warning (_("Cannot resolve relocation to \"%s\" " | |
235 | "from compiled module \"%s\" section \"%s\"."), | |
236 | name, bfd_get_filename (abfd), bfd_get_section_name (abfd, section)); | |
bb2ec1b3 TT |
237 | } |
238 | ||
239 | /* Helper for link_callbacks callbacks vector. */ | |
240 | ||
1a72702b | 241 | static void |
bb2ec1b3 TT |
242 | link_callbacks_reloc_overflow (struct bfd_link_info *link_info, |
243 | struct bfd_link_hash_entry *entry, | |
244 | const char *name, const char *reloc_name, | |
245 | bfd_vma addend, bfd *abfd, asection *section, | |
246 | bfd_vma address) | |
247 | { | |
bb2ec1b3 TT |
248 | } |
249 | ||
250 | /* Helper for link_callbacks callbacks vector. */ | |
251 | ||
1a72702b | 252 | static void |
bb2ec1b3 TT |
253 | link_callbacks_reloc_dangerous (struct bfd_link_info *link_info, |
254 | const char *message, bfd *abfd, | |
255 | asection *section, bfd_vma address) | |
256 | { | |
257 | warning (_("Compiled module \"%s\" section \"%s\": dangerous " | |
258 | "relocation: %s\n"), | |
259 | bfd_get_filename (abfd), bfd_get_section_name (abfd, section), | |
260 | message); | |
bb2ec1b3 TT |
261 | } |
262 | ||
263 | /* Helper for link_callbacks callbacks vector. */ | |
264 | ||
1a72702b | 265 | static void |
bb2ec1b3 TT |
266 | link_callbacks_unattached_reloc (struct bfd_link_info *link_info, |
267 | const char *name, bfd *abfd, asection *section, | |
268 | bfd_vma address) | |
269 | { | |
270 | warning (_("Compiled module \"%s\" section \"%s\": unattached " | |
271 | "relocation: %s\n"), | |
272 | bfd_get_filename (abfd), bfd_get_section_name (abfd, section), | |
273 | name); | |
bb2ec1b3 TT |
274 | } |
275 | ||
276 | /* Helper for link_callbacks callbacks vector. */ | |
277 | ||
77b64a49 PA |
278 | static void link_callbacks_einfo (const char *fmt, ...) |
279 | ATTRIBUTE_PRINTF (1, 2); | |
280 | ||
bb2ec1b3 TT |
281 | static void |
282 | link_callbacks_einfo (const char *fmt, ...) | |
283 | { | |
bb2ec1b3 | 284 | va_list ap; |
bb2ec1b3 TT |
285 | |
286 | va_start (ap, fmt); | |
20dcd8ca | 287 | std::string str = string_vprintf (fmt, ap); |
bb2ec1b3 | 288 | va_end (ap); |
bb2ec1b3 | 289 | |
20dcd8ca | 290 | warning (_("Compile module: warning: %s"), str.c_str ()); |
bb2ec1b3 TT |
291 | } |
292 | ||
293 | /* Helper for bfd_get_relocated_section_contents. | |
294 | Only these symbols are set by bfd_simple_get_relocated_section_contents | |
295 | but bfd/ seems to use even the NULL ones without checking them first. */ | |
296 | ||
297 | static const struct bfd_link_callbacks link_callbacks = | |
298 | { | |
299 | NULL, /* add_archive_element */ | |
300 | link_callbacks_multiple_definition, /* multiple_definition */ | |
301 | NULL, /* multiple_common */ | |
302 | NULL, /* add_to_set */ | |
303 | NULL, /* constructor */ | |
304 | link_callbacks_warning, /* warning */ | |
305 | link_callbacks_undefined_symbol, /* undefined_symbol */ | |
306 | link_callbacks_reloc_overflow, /* reloc_overflow */ | |
307 | link_callbacks_reloc_dangerous, /* reloc_dangerous */ | |
308 | link_callbacks_unattached_reloc, /* unattached_reloc */ | |
309 | NULL, /* notice */ | |
310 | link_callbacks_einfo, /* einfo */ | |
311 | NULL, /* info */ | |
312 | NULL, /* minfo */ | |
313 | NULL, /* override_segment_assignment */ | |
314 | }; | |
315 | ||
316 | struct link_hash_table_cleanup_data | |
317 | { | |
318 | bfd *abfd; | |
319 | bfd *link_next; | |
320 | }; | |
321 | ||
322 | /* Cleanup callback for struct bfd_link_info. */ | |
323 | ||
324 | static void | |
325 | link_hash_table_free (void *d) | |
326 | { | |
9a3c8263 SM |
327 | struct link_hash_table_cleanup_data *data |
328 | = (struct link_hash_table_cleanup_data *) d; | |
bb2ec1b3 TT |
329 | |
330 | if (data->abfd->is_linker_output) | |
331 | (*data->abfd->link.hash->hash_table_free) (data->abfd); | |
332 | data->abfd->link.next = data->link_next; | |
333 | } | |
334 | ||
335 | /* Relocate and store into inferior memory each section SECT of ABFD. */ | |
336 | ||
337 | static void | |
338 | copy_sections (bfd *abfd, asection *sect, void *data) | |
339 | { | |
9a3c8263 | 340 | asymbol **symbol_table = (asymbol **) data; |
bb2ec1b3 TT |
341 | bfd_byte *sect_data, *sect_data_got; |
342 | struct cleanup *cleanups; | |
343 | struct bfd_link_info link_info; | |
344 | struct bfd_link_order link_order; | |
345 | CORE_ADDR inferior_addr; | |
346 | struct link_hash_table_cleanup_data cleanup_data; | |
347 | ||
348 | if ((bfd_get_section_flags (abfd, sect) & (SEC_ALLOC | SEC_LOAD)) | |
349 | != (SEC_ALLOC | SEC_LOAD)) | |
350 | return; | |
351 | ||
352 | if (bfd_get_section_size (sect) == 0) | |
353 | return; | |
354 | ||
355 | /* Mostly a copy of bfd_simple_get_relocated_section_contents which GDB | |
356 | cannot use as it does not report relocations to undefined symbols. */ | |
357 | memset (&link_info, 0, sizeof (link_info)); | |
358 | link_info.output_bfd = abfd; | |
359 | link_info.input_bfds = abfd; | |
360 | link_info.input_bfds_tail = &abfd->link.next; | |
361 | ||
362 | cleanup_data.abfd = abfd; | |
363 | cleanup_data.link_next = abfd->link.next; | |
364 | ||
365 | abfd->link.next = NULL; | |
366 | link_info.hash = bfd_link_hash_table_create (abfd); | |
367 | ||
368 | cleanups = make_cleanup (link_hash_table_free, &cleanup_data); | |
369 | link_info.callbacks = &link_callbacks; | |
370 | ||
371 | memset (&link_order, 0, sizeof (link_order)); | |
372 | link_order.next = NULL; | |
373 | link_order.type = bfd_indirect_link_order; | |
374 | link_order.offset = 0; | |
375 | link_order.size = bfd_get_section_size (sect); | |
376 | link_order.u.indirect.section = sect; | |
377 | ||
224c3ddb | 378 | sect_data = (bfd_byte *) xmalloc (bfd_get_section_size (sect)); |
bb2ec1b3 TT |
379 | make_cleanup (xfree, sect_data); |
380 | ||
381 | sect_data_got = bfd_get_relocated_section_contents (abfd, &link_info, | |
382 | &link_order, sect_data, | |
383 | FALSE, symbol_table); | |
384 | ||
385 | if (sect_data_got == NULL) | |
386 | error (_("Cannot map compiled module \"%s\" section \"%s\": %s"), | |
387 | bfd_get_filename (abfd), bfd_get_section_name (abfd, sect), | |
388 | bfd_errmsg (bfd_get_error ())); | |
389 | gdb_assert (sect_data_got == sect_data); | |
390 | ||
391 | inferior_addr = bfd_get_section_vma (abfd, sect); | |
392 | if (0 != target_write_memory (inferior_addr, sect_data, | |
393 | bfd_get_section_size (sect))) | |
394 | error (_("Cannot write compiled module \"%s\" section \"%s\" " | |
395 | "to inferior memory range %s-%s."), | |
396 | bfd_get_filename (abfd), bfd_get_section_name (abfd, sect), | |
397 | paddress (target_gdbarch (), inferior_addr), | |
398 | paddress (target_gdbarch (), | |
399 | inferior_addr + bfd_get_section_size (sect))); | |
400 | ||
401 | do_cleanups (cleanups); | |
402 | } | |
403 | ||
36de76f9 JK |
404 | /* Fetch the type of COMPILE_I_EXPR_PTR_TYPE and COMPILE_I_EXPR_VAL |
405 | symbols in OBJFILE so we can calculate how much memory to allocate | |
406 | for the out parameter. This avoids needing a malloc in the generated | |
407 | code. Throw an error if anything fails. | |
408 | GDB first tries to compile the code with COMPILE_I_PRINT_ADDRESS_SCOPE. | |
409 | If it finds user tries to print an array type this function returns | |
410 | NULL. Caller will then regenerate the code with | |
411 | COMPILE_I_PRINT_VALUE_SCOPE, recompiles it again and finally runs it. | |
412 | This is because __auto_type array-to-pointer type conversion of | |
413 | COMPILE_I_EXPR_VAL which gets detected by COMPILE_I_EXPR_PTR_TYPE | |
414 | preserving the array type. */ | |
415 | ||
416 | static struct type * | |
417 | get_out_value_type (struct symbol *func_sym, struct objfile *objfile, | |
418 | enum compile_i_scope_types scope) | |
419 | { | |
d976bace JK |
420 | struct symbol *gdb_ptr_type_sym; |
421 | /* Initialize it just to avoid a GCC false warning. */ | |
422 | struct symbol *gdb_val_sym = NULL; | |
4d18dfad | 423 | struct type *gdb_ptr_type, *gdb_type_from_ptr, *gdb_type, *retval; |
d976bace JK |
424 | /* Initialize it just to avoid a GCC false warning. */ |
425 | const struct block *block = NULL; | |
36de76f9 JK |
426 | const struct blockvector *bv; |
427 | int nblocks = 0; | |
428 | int block_loop = 0; | |
429 | ||
430 | bv = SYMTAB_BLOCKVECTOR (func_sym->owner.symtab); | |
431 | nblocks = BLOCKVECTOR_NBLOCKS (bv); | |
432 | ||
433 | gdb_ptr_type_sym = NULL; | |
434 | for (block_loop = 0; block_loop < nblocks; block_loop++) | |
435 | { | |
d976bace | 436 | struct symbol *function = NULL; |
36de76f9 JK |
437 | const struct block *function_block; |
438 | ||
439 | block = BLOCKVECTOR_BLOCK (bv, block_loop); | |
440 | if (BLOCK_FUNCTION (block) != NULL) | |
441 | continue; | |
442 | gdb_val_sym = block_lookup_symbol (block, COMPILE_I_EXPR_VAL, VAR_DOMAIN); | |
443 | if (gdb_val_sym == NULL) | |
444 | continue; | |
445 | ||
446 | function_block = block; | |
447 | while (function_block != BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK) | |
448 | && function_block != BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK)) | |
449 | { | |
450 | function_block = BLOCK_SUPERBLOCK (function_block); | |
451 | function = BLOCK_FUNCTION (function_block); | |
452 | if (function != NULL) | |
453 | break; | |
454 | } | |
455 | if (function != NULL | |
456 | && (BLOCK_SUPERBLOCK (function_block) | |
457 | == BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK)) | |
458 | && (strcmp (SYMBOL_LINKAGE_NAME (function), GCC_FE_WRAPPER_FUNCTION) | |
459 | == 0)) | |
460 | break; | |
461 | } | |
462 | if (block_loop == nblocks) | |
463 | error (_("No \"%s\" symbol found"), COMPILE_I_EXPR_PTR_TYPE); | |
464 | ||
465 | gdb_type = SYMBOL_TYPE (gdb_val_sym); | |
f168693b | 466 | gdb_type = check_typedef (gdb_type); |
36de76f9 JK |
467 | |
468 | gdb_ptr_type_sym = block_lookup_symbol (block, COMPILE_I_EXPR_PTR_TYPE, | |
469 | VAR_DOMAIN); | |
470 | if (gdb_ptr_type_sym == NULL) | |
471 | error (_("No \"%s\" symbol found"), COMPILE_I_EXPR_PTR_TYPE); | |
472 | gdb_ptr_type = SYMBOL_TYPE (gdb_ptr_type_sym); | |
f168693b | 473 | gdb_ptr_type = check_typedef (gdb_ptr_type); |
36de76f9 JK |
474 | if (TYPE_CODE (gdb_ptr_type) != TYPE_CODE_PTR) |
475 | error (_("Type of \"%s\" is not a pointer"), COMPILE_I_EXPR_PTR_TYPE); | |
476 | gdb_type_from_ptr = TYPE_TARGET_TYPE (gdb_ptr_type); | |
477 | ||
478 | if (types_deeply_equal (gdb_type, gdb_type_from_ptr)) | |
479 | { | |
480 | if (scope != COMPILE_I_PRINT_ADDRESS_SCOPE) | |
481 | error (_("Expected address scope in compiled module \"%s\"."), | |
482 | objfile_name (objfile)); | |
483 | return gdb_type; | |
484 | } | |
485 | ||
486 | if (TYPE_CODE (gdb_type) != TYPE_CODE_PTR) | |
487 | error (_("Invalid type code %d of symbol \"%s\" " | |
488 | "in compiled module \"%s\"."), | |
489 | TYPE_CODE (gdb_type_from_ptr), COMPILE_I_EXPR_VAL, | |
490 | objfile_name (objfile)); | |
491 | ||
4d18dfad | 492 | retval = gdb_type_from_ptr; |
36de76f9 JK |
493 | switch (TYPE_CODE (gdb_type_from_ptr)) |
494 | { | |
495 | case TYPE_CODE_ARRAY: | |
496 | gdb_type_from_ptr = TYPE_TARGET_TYPE (gdb_type_from_ptr); | |
497 | break; | |
498 | case TYPE_CODE_FUNC: | |
499 | break; | |
500 | default: | |
501 | error (_("Invalid type code %d of symbol \"%s\" " | |
502 | "in compiled module \"%s\"."), | |
503 | TYPE_CODE (gdb_type_from_ptr), COMPILE_I_EXPR_PTR_TYPE, | |
504 | objfile_name (objfile)); | |
505 | } | |
506 | if (!types_deeply_equal (gdb_type_from_ptr, | |
507 | TYPE_TARGET_TYPE (gdb_type))) | |
508 | error (_("Referenced types do not match for symbols \"%s\" and \"%s\" " | |
509 | "in compiled module \"%s\"."), | |
510 | COMPILE_I_EXPR_PTR_TYPE, COMPILE_I_EXPR_VAL, | |
511 | objfile_name (objfile)); | |
512 | if (scope == COMPILE_I_PRINT_ADDRESS_SCOPE) | |
513 | return NULL; | |
4d18dfad | 514 | return retval; |
36de76f9 JK |
515 | } |
516 | ||
83d3415e JK |
517 | /* Fetch the type of first parameter of FUNC_SYM. |
518 | Return NULL if FUNC_SYM has no parameters. Throw an error otherwise. */ | |
bb2ec1b3 TT |
519 | |
520 | static struct type * | |
83d3415e | 521 | get_regs_type (struct symbol *func_sym, struct objfile *objfile) |
bb2ec1b3 | 522 | { |
83d3415e JK |
523 | struct type *func_type = SYMBOL_TYPE (func_sym); |
524 | struct type *regsp_type, *regs_type; | |
bb2ec1b3 TT |
525 | |
526 | /* No register parameter present. */ | |
527 | if (TYPE_NFIELDS (func_type) == 0) | |
528 | return NULL; | |
529 | ||
bb2ec1b3 TT |
530 | regsp_type = check_typedef (TYPE_FIELD_TYPE (func_type, 0)); |
531 | if (TYPE_CODE (regsp_type) != TYPE_CODE_PTR) | |
532 | error (_("Invalid type code %d of first parameter of function \"%s\" " | |
533 | "in compiled module \"%s\"."), | |
534 | TYPE_CODE (regsp_type), GCC_FE_WRAPPER_FUNCTION, | |
535 | objfile_name (objfile)); | |
536 | ||
537 | regs_type = check_typedef (TYPE_TARGET_TYPE (regsp_type)); | |
538 | if (TYPE_CODE (regs_type) != TYPE_CODE_STRUCT) | |
539 | error (_("Invalid type code %d of dereferenced first parameter " | |
540 | "of function \"%s\" in compiled module \"%s\"."), | |
541 | TYPE_CODE (regs_type), GCC_FE_WRAPPER_FUNCTION, | |
542 | objfile_name (objfile)); | |
543 | ||
544 | return regs_type; | |
545 | } | |
546 | ||
547 | /* Store all inferior registers required by REGS_TYPE to inferior memory | |
548 | starting at inferior address REGS_BASE. */ | |
549 | ||
550 | static void | |
551 | store_regs (struct type *regs_type, CORE_ADDR regs_base) | |
552 | { | |
553 | struct gdbarch *gdbarch = target_gdbarch (); | |
554 | struct regcache *regcache = get_thread_regcache (inferior_ptid); | |
555 | int fieldno; | |
556 | ||
557 | for (fieldno = 0; fieldno < TYPE_NFIELDS (regs_type); fieldno++) | |
558 | { | |
559 | const char *reg_name = TYPE_FIELD_NAME (regs_type, fieldno); | |
560 | ULONGEST reg_bitpos = TYPE_FIELD_BITPOS (regs_type, fieldno); | |
561 | ULONGEST reg_bitsize = TYPE_FIELD_BITSIZE (regs_type, fieldno); | |
562 | ULONGEST reg_offset; | |
563 | struct type *reg_type = check_typedef (TYPE_FIELD_TYPE (regs_type, | |
564 | fieldno)); | |
565 | ULONGEST reg_size = TYPE_LENGTH (reg_type); | |
566 | int regnum; | |
567 | struct value *regval; | |
568 | CORE_ADDR inferior_addr; | |
569 | ||
570 | if (strcmp (reg_name, COMPILE_I_SIMPLE_REGISTER_DUMMY) == 0) | |
571 | continue; | |
572 | ||
573 | if ((reg_bitpos % 8) != 0 || reg_bitsize != 0) | |
574 | error (_("Invalid register \"%s\" position %s bits or size %s bits"), | |
575 | reg_name, pulongest (reg_bitpos), pulongest (reg_bitsize)); | |
576 | reg_offset = reg_bitpos / 8; | |
577 | ||
578 | if (TYPE_CODE (reg_type) != TYPE_CODE_INT | |
579 | && TYPE_CODE (reg_type) != TYPE_CODE_PTR) | |
580 | error (_("Invalid register \"%s\" type code %d"), reg_name, | |
581 | TYPE_CODE (reg_type)); | |
582 | ||
583 | regnum = compile_register_name_demangle (gdbarch, reg_name); | |
584 | ||
585 | regval = value_from_register (reg_type, regnum, get_current_frame ()); | |
586 | if (value_optimized_out (regval)) | |
587 | error (_("Register \"%s\" is optimized out."), reg_name); | |
588 | if (!value_entirely_available (regval)) | |
589 | error (_("Register \"%s\" is not available."), reg_name); | |
590 | ||
591 | inferior_addr = regs_base + reg_offset; | |
592 | if (0 != target_write_memory (inferior_addr, value_contents (regval), | |
593 | reg_size)) | |
594 | error (_("Cannot write register \"%s\" to inferior memory at %s."), | |
595 | reg_name, paddress (gdbarch, inferior_addr)); | |
596 | } | |
597 | } | |
598 | ||
aaee65ae PA |
599 | /* Load the object file specified in FILE_NAMES into inferior memory. |
600 | Throw an error otherwise. Caller must fully dispose the return | |
601 | value by calling compile_object_run. Returns NULL only for | |
602 | COMPILE_I_PRINT_ADDRESS_SCOPE when COMPILE_I_PRINT_VALUE_SCOPE | |
603 | should have been used instead. */ | |
bb2ec1b3 TT |
604 | |
605 | struct compile_module * | |
aaee65ae | 606 | compile_object_load (const compile_file_names &file_names, |
5c65b58a | 607 | enum compile_i_scope_types scope, void *scope_data) |
bb2ec1b3 | 608 | { |
ed2b3126 | 609 | struct cleanup *cleanups; |
bb2ec1b3 | 610 | struct setup_sections_data setup_sections_data; |
36de76f9 | 611 | CORE_ADDR addr, regs_addr, out_value_addr = 0; |
83d3415e JK |
612 | struct symbol *func_sym; |
613 | struct type *func_type; | |
bb2ec1b3 TT |
614 | struct bound_minimal_symbol bmsym; |
615 | long storage_needed; | |
616 | asymbol **symbol_table, **symp; | |
617 | long number_of_symbols, missing_symbols; | |
618 | struct type *dptr_type = builtin_type (target_gdbarch ())->builtin_data_ptr; | |
619 | unsigned dptr_type_len = TYPE_LENGTH (dptr_type); | |
620 | struct compile_module *retval; | |
36de76f9 | 621 | struct type *regs_type, *out_value_type = NULL; |
ee0c3293 | 622 | char **matching; |
bb2ec1b3 | 623 | struct objfile *objfile; |
83d3415e JK |
624 | int expect_parameters; |
625 | struct type *expect_return_type; | |
7f361056 | 626 | struct munmap_list *munmap_list_head = NULL; |
bb2ec1b3 | 627 | |
ee0c3293 TT |
628 | gdb::unique_xmalloc_ptr<char> filename |
629 | (tilde_expand (file_names.object_file ())); | |
bb2ec1b3 | 630 | |
ee0c3293 | 631 | gdb_bfd_ref_ptr abfd (gdb_bfd_open (filename.get (), gnutarget, -1)); |
bb2ec1b3 TT |
632 | if (abfd == NULL) |
633 | error (_("\"%s\": could not open as compiled module: %s"), | |
ee0c3293 | 634 | filename.get (), bfd_errmsg (bfd_get_error ())); |
bb2ec1b3 | 635 | |
192b62ce | 636 | if (!bfd_check_format_matches (abfd.get (), bfd_object, &matching)) |
bb2ec1b3 | 637 | error (_("\"%s\": not in loadable format: %s"), |
ee0c3293 | 638 | filename.get (), gdb_bfd_errmsg (bfd_get_error (), matching)); |
bb2ec1b3 | 639 | |
192b62ce | 640 | if ((bfd_get_file_flags (abfd.get ()) & (EXEC_P | DYNAMIC)) != 0) |
ee0c3293 | 641 | error (_("\"%s\": not in object format."), filename.get ()); |
bb2ec1b3 TT |
642 | |
643 | setup_sections_data.last_size = 0; | |
644 | setup_sections_data.last_section_first = abfd->sections; | |
645 | setup_sections_data.last_prot = -1; | |
646 | setup_sections_data.last_max_alignment = 1; | |
7f361056 | 647 | setup_sections_data.munmap_list_headp = &munmap_list_head; |
ee0c3293 | 648 | cleanups = make_cleanup (munmap_listp_free_cleanup, &munmap_list_head); |
192b62ce TT |
649 | bfd_map_over_sections (abfd.get (), setup_sections, &setup_sections_data); |
650 | setup_sections (abfd.get (), NULL, &setup_sections_data); | |
bb2ec1b3 | 651 | |
192b62ce | 652 | storage_needed = bfd_get_symtab_upper_bound (abfd.get ()); |
bb2ec1b3 TT |
653 | if (storage_needed < 0) |
654 | error (_("Cannot read symbols of compiled module \"%s\": %s"), | |
ee0c3293 | 655 | filename.get (), bfd_errmsg (bfd_get_error ())); |
bb2ec1b3 TT |
656 | |
657 | /* SYMFILE_VERBOSE is not passed even if FROM_TTY, user is not interested in | |
658 | "Reading symbols from ..." message for automatically generated file. */ | |
ed2b3126 TT |
659 | std::unique_ptr<struct objfile> objfile_holder |
660 | (symbol_file_add_from_bfd (abfd.get (), filename.get (), | |
661 | 0, NULL, 0, NULL)); | |
662 | objfile = objfile_holder.get (); | |
bb2ec1b3 | 663 | |
83d3415e JK |
664 | func_sym = lookup_global_symbol_from_objfile (objfile, |
665 | GCC_FE_WRAPPER_FUNCTION, | |
d12307c1 | 666 | VAR_DOMAIN).symbol; |
83d3415e JK |
667 | if (func_sym == NULL) |
668 | error (_("Cannot find function \"%s\" in compiled module \"%s\"."), | |
669 | GCC_FE_WRAPPER_FUNCTION, objfile_name (objfile)); | |
670 | func_type = SYMBOL_TYPE (func_sym); | |
671 | if (TYPE_CODE (func_type) != TYPE_CODE_FUNC) | |
672 | error (_("Invalid type code %d of function \"%s\" in compiled " | |
673 | "module \"%s\"."), | |
674 | TYPE_CODE (func_type), GCC_FE_WRAPPER_FUNCTION, | |
675 | objfile_name (objfile)); | |
676 | ||
677 | switch (scope) | |
678 | { | |
679 | case COMPILE_I_SIMPLE_SCOPE: | |
680 | expect_parameters = 1; | |
681 | expect_return_type = builtin_type (target_gdbarch ())->builtin_void; | |
682 | break; | |
683 | case COMPILE_I_RAW_SCOPE: | |
684 | expect_parameters = 0; | |
685 | expect_return_type = builtin_type (target_gdbarch ())->builtin_void; | |
686 | break; | |
36de76f9 JK |
687 | case COMPILE_I_PRINT_ADDRESS_SCOPE: |
688 | case COMPILE_I_PRINT_VALUE_SCOPE: | |
689 | expect_parameters = 2; | |
690 | expect_return_type = builtin_type (target_gdbarch ())->builtin_void; | |
691 | break; | |
83d3415e JK |
692 | default: |
693 | internal_error (__FILE__, __LINE__, _("invalid scope %d"), scope); | |
694 | } | |
695 | if (TYPE_NFIELDS (func_type) != expect_parameters) | |
696 | error (_("Invalid %d parameters of function \"%s\" in compiled " | |
697 | "module \"%s\"."), | |
698 | TYPE_NFIELDS (func_type), GCC_FE_WRAPPER_FUNCTION, | |
699 | objfile_name (objfile)); | |
700 | if (!types_deeply_equal (expect_return_type, TYPE_TARGET_TYPE (func_type))) | |
701 | error (_("Invalid return type of function \"%s\" in compiled " | |
702 | "module \"%s\"."), | |
703 | GCC_FE_WRAPPER_FUNCTION, objfile_name (objfile)); | |
bb2ec1b3 TT |
704 | |
705 | /* The memory may be later needed | |
706 | by bfd_generic_get_relocated_section_contents | |
707 | called from default_symfile_relocate. */ | |
224c3ddb SM |
708 | symbol_table = (asymbol **) obstack_alloc (&objfile->objfile_obstack, |
709 | storage_needed); | |
192b62ce | 710 | number_of_symbols = bfd_canonicalize_symtab (abfd.get (), symbol_table); |
bb2ec1b3 TT |
711 | if (number_of_symbols < 0) |
712 | error (_("Cannot parse symbols of compiled module \"%s\": %s"), | |
ee0c3293 | 713 | filename.get (), bfd_errmsg (bfd_get_error ())); |
bb2ec1b3 TT |
714 | |
715 | missing_symbols = 0; | |
716 | for (symp = symbol_table; symp < symbol_table + number_of_symbols; symp++) | |
717 | { | |
718 | asymbol *sym = *symp; | |
719 | ||
720 | if (sym->flags != 0) | |
721 | continue; | |
bb2ec1b3 TT |
722 | sym->flags = BSF_GLOBAL; |
723 | sym->section = bfd_abs_section_ptr; | |
724 | if (strcmp (sym->name, "_GLOBAL_OFFSET_TABLE_") == 0) | |
725 | { | |
b0fd6b30 JK |
726 | if (compile_debug) |
727 | fprintf_unfiltered (gdb_stdlog, | |
728 | "ELF symbol \"%s\" relocated to zero\n", | |
729 | sym->name); | |
730 | ||
731 | /* It seems to be a GCC bug, with -mcmodel=large there should be no | |
732 | need for _GLOBAL_OFFSET_TABLE_. Together with -fPIE the data | |
733 | remain PC-relative even with _GLOBAL_OFFSET_TABLE_ as zero. */ | |
bb2ec1b3 TT |
734 | sym->value = 0; |
735 | continue; | |
736 | } | |
737 | bmsym = lookup_minimal_symbol (sym->name, NULL, NULL); | |
738 | switch (bmsym.minsym == NULL | |
739 | ? mst_unknown : MSYMBOL_TYPE (bmsym.minsym)) | |
740 | { | |
741 | case mst_text: | |
742 | sym->value = BMSYMBOL_VALUE_ADDRESS (bmsym); | |
b0fd6b30 JK |
743 | if (compile_debug) |
744 | fprintf_unfiltered (gdb_stdlog, | |
745 | "ELF mst_text symbol \"%s\" relocated to %s\n", | |
746 | sym->name, | |
747 | paddress (target_gdbarch (), sym->value)); | |
bb2ec1b3 | 748 | break; |
e26efa40 JK |
749 | case mst_text_gnu_ifunc: |
750 | sym->value = gnu_ifunc_resolve_addr (target_gdbarch (), | |
751 | BMSYMBOL_VALUE_ADDRESS (bmsym)); | |
b0fd6b30 JK |
752 | if (compile_debug) |
753 | fprintf_unfiltered (gdb_stdlog, | |
754 | "ELF mst_text_gnu_ifunc symbol \"%s\" " | |
755 | "relocated to %s\n", | |
756 | sym->name, | |
757 | paddress (target_gdbarch (), sym->value)); | |
e26efa40 | 758 | break; |
bb2ec1b3 TT |
759 | default: |
760 | warning (_("Could not find symbol \"%s\" " | |
761 | "for compiled module \"%s\"."), | |
ee0c3293 | 762 | sym->name, filename.get ()); |
bb2ec1b3 TT |
763 | missing_symbols++; |
764 | } | |
765 | } | |
766 | if (missing_symbols) | |
767 | error (_("%ld symbols were missing, cannot continue."), missing_symbols); | |
768 | ||
192b62ce | 769 | bfd_map_over_sections (abfd.get (), copy_sections, symbol_table); |
bb2ec1b3 | 770 | |
83d3415e | 771 | regs_type = get_regs_type (func_sym, objfile); |
bb2ec1b3 TT |
772 | if (regs_type == NULL) |
773 | regs_addr = 0; | |
774 | else | |
775 | { | |
776 | /* Use read-only non-executable memory protection. */ | |
777 | regs_addr = gdbarch_infcall_mmap (target_gdbarch (), | |
778 | TYPE_LENGTH (regs_type), | |
779 | GDB_MMAP_PROT_READ); | |
780 | gdb_assert (regs_addr != 0); | |
7f361056 | 781 | munmap_list_add (&munmap_list_head, regs_addr, TYPE_LENGTH (regs_type)); |
b6de3f96 | 782 | if (compile_debug) |
a4063588 | 783 | fprintf_unfiltered (gdb_stdlog, |
b6de3f96 JK |
784 | "allocated %s bytes at %s for registers\n", |
785 | paddress (target_gdbarch (), | |
786 | TYPE_LENGTH (regs_type)), | |
787 | paddress (target_gdbarch (), regs_addr)); | |
bb2ec1b3 TT |
788 | store_regs (regs_type, regs_addr); |
789 | } | |
790 | ||
36de76f9 JK |
791 | if (scope == COMPILE_I_PRINT_ADDRESS_SCOPE |
792 | || scope == COMPILE_I_PRINT_VALUE_SCOPE) | |
793 | { | |
794 | out_value_type = get_out_value_type (func_sym, objfile, scope); | |
795 | if (out_value_type == NULL) | |
796 | { | |
797 | do_cleanups (cleanups); | |
798 | return NULL; | |
799 | } | |
800 | check_typedef (out_value_type); | |
801 | out_value_addr = gdbarch_infcall_mmap (target_gdbarch (), | |
802 | TYPE_LENGTH (out_value_type), | |
803 | (GDB_MMAP_PROT_READ | |
804 | | GDB_MMAP_PROT_WRITE)); | |
805 | gdb_assert (out_value_addr != 0); | |
7f361056 JK |
806 | munmap_list_add (&munmap_list_head, out_value_addr, |
807 | TYPE_LENGTH (out_value_type)); | |
36de76f9 | 808 | if (compile_debug) |
a4063588 | 809 | fprintf_unfiltered (gdb_stdlog, |
36de76f9 JK |
810 | "allocated %s bytes at %s for printed value\n", |
811 | paddress (target_gdbarch (), | |
812 | TYPE_LENGTH (out_value_type)), | |
813 | paddress (target_gdbarch (), out_value_addr)); | |
814 | } | |
815 | ||
8d749320 | 816 | retval = XNEW (struct compile_module); |
ed2b3126 | 817 | retval->objfile = objfile_holder.release (); |
aaee65ae | 818 | retval->source_file = xstrdup (file_names.source_file ()); |
83d3415e | 819 | retval->func_sym = func_sym; |
bb2ec1b3 | 820 | retval->regs_addr = regs_addr; |
5c65b58a JK |
821 | retval->scope = scope; |
822 | retval->scope_data = scope_data; | |
36de76f9 JK |
823 | retval->out_value_type = out_value_type; |
824 | retval->out_value_addr = out_value_addr; | |
7f361056 JK |
825 | |
826 | /* CLEANUPS will free MUNMAP_LIST_HEAD. */ | |
827 | retval->munmap_list_head = munmap_list_head; | |
828 | munmap_list_head = NULL; | |
829 | ||
830 | do_cleanups (cleanups); | |
831 | ||
bb2ec1b3 TT |
832 | return retval; |
833 | } |