Commit | Line | Data |
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bb2ec1b3 TT |
1 | /* Load module for 'compile' command. |
2 | ||
e2882c85 | 3 | Copyright (C) 2014-2018 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" | |
00431a78 | 31 | #include "gdbthread.h" |
bb2ec1b3 | 32 | #include "compile.h" |
36de76f9 | 33 | #include "block.h" |
bb2ec1b3 | 34 | #include "arch-utils.h" |
325fac50 | 35 | #include <algorithm> |
bb2ec1b3 | 36 | |
7f361056 JK |
37 | /* Track inferior memory reserved by inferior mmap. */ |
38 | ||
39 | struct munmap_list | |
40 | { | |
41 | struct munmap_list *next; | |
42 | CORE_ADDR addr, size; | |
43 | }; | |
44 | ||
45 | /* Add inferior mmap memory range ADDR..ADDR+SIZE (exclusive) to list | |
46 | HEADP. *HEADP needs to be initialized to NULL. */ | |
47 | ||
48 | static void | |
49 | munmap_list_add (struct munmap_list **headp, CORE_ADDR addr, CORE_ADDR size) | |
50 | { | |
8d749320 | 51 | struct munmap_list *head_new = XNEW (struct munmap_list); |
7f361056 JK |
52 | |
53 | head_new->next = *headp; | |
54 | *headp = head_new; | |
55 | head_new->addr = addr; | |
56 | head_new->size = size; | |
57 | } | |
58 | ||
59 | /* Free list of inferior mmap memory ranges HEAD. HEAD is the first | |
60 | element of the list, it can be NULL. After calling this function | |
61 | HEAD pointer is invalid and the possible list needs to be | |
62 | reinitialized by caller to NULL. */ | |
63 | ||
64 | void | |
65 | munmap_list_free (struct munmap_list *head) | |
66 | { | |
67 | while (head) | |
68 | { | |
69 | struct munmap_list *todo = head; | |
70 | ||
71 | head = todo->next; | |
72 | gdbarch_infcall_munmap (target_gdbarch (), todo->addr, todo->size); | |
73 | xfree (todo); | |
74 | } | |
75 | } | |
76 | ||
77 | /* Stub for munmap_list_free suitable for make_cleanup. Contrary to | |
78 | munmap_list_free this function's parameter is a pointer to the first | |
79 | list element pointer. */ | |
80 | ||
81 | static void | |
82 | munmap_listp_free_cleanup (void *headp_voidp) | |
83 | { | |
9a3c8263 | 84 | struct munmap_list **headp = (struct munmap_list **) headp_voidp; |
7f361056 JK |
85 | |
86 | munmap_list_free (*headp); | |
87 | } | |
88 | ||
bb2ec1b3 TT |
89 | /* Helper data for setup_sections. */ |
90 | ||
91 | struct setup_sections_data | |
92 | { | |
93 | /* Size of all recent sections with matching LAST_PROT. */ | |
94 | CORE_ADDR last_size; | |
95 | ||
96 | /* First section matching LAST_PROT. */ | |
97 | asection *last_section_first; | |
98 | ||
99 | /* Memory protection like the prot parameter of gdbarch_infcall_mmap. */ | |
100 | unsigned last_prot; | |
101 | ||
102 | /* Maximum of alignments of all sections matching LAST_PROT. | |
103 | This value is always at least 1. This value is always a power of 2. */ | |
104 | CORE_ADDR last_max_alignment; | |
7f361056 JK |
105 | |
106 | /* List of inferior mmap ranges where setup_sections should add its | |
107 | next range. */ | |
108 | struct munmap_list **munmap_list_headp; | |
bb2ec1b3 TT |
109 | }; |
110 | ||
111 | /* Place all ABFD sections next to each other obeying all constraints. */ | |
112 | ||
113 | static void | |
114 | setup_sections (bfd *abfd, asection *sect, void *data_voidp) | |
115 | { | |
9a3c8263 | 116 | struct setup_sections_data *data = (struct setup_sections_data *) data_voidp; |
bb2ec1b3 TT |
117 | CORE_ADDR alignment; |
118 | unsigned prot; | |
119 | ||
120 | if (sect != NULL) | |
121 | { | |
122 | /* It is required by later bfd_get_relocated_section_contents. */ | |
123 | if (sect->output_section == NULL) | |
124 | sect->output_section = sect; | |
125 | ||
126 | if ((bfd_get_section_flags (abfd, sect) & SEC_ALLOC) == 0) | |
127 | return; | |
128 | ||
bb2b33b9 | 129 | /* Make the memory always readable. */ |
bb2ec1b3 TT |
130 | prot = GDB_MMAP_PROT_READ; |
131 | if ((bfd_get_section_flags (abfd, sect) & SEC_READONLY) == 0) | |
132 | prot |= GDB_MMAP_PROT_WRITE; | |
133 | if ((bfd_get_section_flags (abfd, sect) & SEC_CODE) != 0) | |
134 | prot |= GDB_MMAP_PROT_EXEC; | |
135 | ||
136 | if (compile_debug) | |
a4063588 | 137 | fprintf_unfiltered (gdb_stdlog, |
bb2ec1b3 TT |
138 | "module \"%s\" section \"%s\" size %s prot %u\n", |
139 | bfd_get_filename (abfd), | |
140 | bfd_get_section_name (abfd, sect), | |
141 | paddress (target_gdbarch (), | |
142 | bfd_get_section_size (sect)), | |
143 | prot); | |
144 | } | |
145 | else | |
146 | prot = -1; | |
147 | ||
148 | if (sect == NULL | |
149 | || (data->last_prot != prot && bfd_get_section_size (sect) != 0)) | |
150 | { | |
151 | CORE_ADDR addr; | |
152 | asection *sect_iter; | |
153 | ||
154 | if (data->last_size != 0) | |
155 | { | |
156 | addr = gdbarch_infcall_mmap (target_gdbarch (), data->last_size, | |
157 | data->last_prot); | |
7f361056 | 158 | munmap_list_add (data->munmap_list_headp, addr, data->last_size); |
bb2ec1b3 | 159 | if (compile_debug) |
a4063588 | 160 | fprintf_unfiltered (gdb_stdlog, |
bb2ec1b3 TT |
161 | "allocated %s bytes at %s prot %u\n", |
162 | paddress (target_gdbarch (), data->last_size), | |
163 | paddress (target_gdbarch (), addr), | |
164 | data->last_prot); | |
165 | } | |
166 | else | |
167 | addr = 0; | |
168 | ||
169 | if ((addr & (data->last_max_alignment - 1)) != 0) | |
170 | error (_("Inferior compiled module address %s " | |
171 | "is not aligned to BFD required %s."), | |
172 | paddress (target_gdbarch (), addr), | |
173 | paddress (target_gdbarch (), data->last_max_alignment)); | |
174 | ||
175 | for (sect_iter = data->last_section_first; sect_iter != sect; | |
176 | sect_iter = sect_iter->next) | |
177 | if ((bfd_get_section_flags (abfd, sect_iter) & SEC_ALLOC) != 0) | |
178 | bfd_set_section_vma (abfd, sect_iter, | |
179 | addr + bfd_get_section_vma (abfd, sect_iter)); | |
180 | ||
181 | data->last_size = 0; | |
182 | data->last_section_first = sect; | |
183 | data->last_prot = prot; | |
184 | data->last_max_alignment = 1; | |
185 | } | |
186 | ||
187 | if (sect == NULL) | |
188 | return; | |
189 | ||
190 | alignment = ((CORE_ADDR) 1) << bfd_get_section_alignment (abfd, sect); | |
325fac50 | 191 | data->last_max_alignment = std::max (data->last_max_alignment, alignment); |
bb2ec1b3 TT |
192 | |
193 | data->last_size = (data->last_size + alignment - 1) & -alignment; | |
194 | ||
195 | bfd_set_section_vma (abfd, sect, data->last_size); | |
196 | ||
197 | data->last_size += bfd_get_section_size (sect); | |
198 | data->last_size = (data->last_size + alignment - 1) & -alignment; | |
199 | } | |
200 | ||
201 | /* Helper for link_callbacks callbacks vector. */ | |
202 | ||
1a72702b | 203 | static void |
bb2ec1b3 TT |
204 | link_callbacks_multiple_definition (struct bfd_link_info *link_info, |
205 | struct bfd_link_hash_entry *h, bfd *nbfd, | |
206 | asection *nsec, bfd_vma nval) | |
207 | { | |
208 | bfd *abfd = link_info->input_bfds; | |
209 | ||
210 | if (link_info->allow_multiple_definition) | |
1a72702b | 211 | return; |
8e8347b8 | 212 | warning (_("Compiled module \"%s\": multiple symbol definitions: %s"), |
bb2ec1b3 | 213 | bfd_get_filename (abfd), h->root.string); |
bb2ec1b3 TT |
214 | } |
215 | ||
216 | /* Helper for link_callbacks callbacks vector. */ | |
217 | ||
1a72702b | 218 | static void |
bb2ec1b3 TT |
219 | link_callbacks_warning (struct bfd_link_info *link_info, const char *xwarning, |
220 | const char *symbol, bfd *abfd, asection *section, | |
221 | bfd_vma address) | |
222 | { | |
8e8347b8 | 223 | warning (_("Compiled module \"%s\" section \"%s\": warning: %s"), |
bb2ec1b3 TT |
224 | bfd_get_filename (abfd), bfd_get_section_name (abfd, section), |
225 | xwarning); | |
bb2ec1b3 TT |
226 | } |
227 | ||
228 | /* Helper for link_callbacks callbacks vector. */ | |
229 | ||
1a72702b | 230 | static void |
bb2ec1b3 TT |
231 | link_callbacks_undefined_symbol (struct bfd_link_info *link_info, |
232 | const char *name, bfd *abfd, asection *section, | |
233 | bfd_vma address, bfd_boolean is_fatal) | |
234 | { | |
235 | warning (_("Cannot resolve relocation to \"%s\" " | |
236 | "from compiled module \"%s\" section \"%s\"."), | |
237 | name, bfd_get_filename (abfd), bfd_get_section_name (abfd, section)); | |
bb2ec1b3 TT |
238 | } |
239 | ||
240 | /* Helper for link_callbacks callbacks vector. */ | |
241 | ||
1a72702b | 242 | static void |
bb2ec1b3 TT |
243 | link_callbacks_reloc_overflow (struct bfd_link_info *link_info, |
244 | struct bfd_link_hash_entry *entry, | |
245 | const char *name, const char *reloc_name, | |
246 | bfd_vma addend, bfd *abfd, asection *section, | |
247 | bfd_vma address) | |
248 | { | |
bb2ec1b3 TT |
249 | } |
250 | ||
251 | /* Helper for link_callbacks callbacks vector. */ | |
252 | ||
1a72702b | 253 | static void |
bb2ec1b3 TT |
254 | link_callbacks_reloc_dangerous (struct bfd_link_info *link_info, |
255 | const char *message, bfd *abfd, | |
256 | asection *section, bfd_vma address) | |
257 | { | |
258 | warning (_("Compiled module \"%s\" section \"%s\": dangerous " | |
259 | "relocation: %s\n"), | |
260 | bfd_get_filename (abfd), bfd_get_section_name (abfd, section), | |
261 | message); | |
bb2ec1b3 TT |
262 | } |
263 | ||
264 | /* Helper for link_callbacks callbacks vector. */ | |
265 | ||
1a72702b | 266 | static void |
bb2ec1b3 TT |
267 | link_callbacks_unattached_reloc (struct bfd_link_info *link_info, |
268 | const char *name, bfd *abfd, asection *section, | |
269 | bfd_vma address) | |
270 | { | |
271 | warning (_("Compiled module \"%s\" section \"%s\": unattached " | |
272 | "relocation: %s\n"), | |
273 | bfd_get_filename (abfd), bfd_get_section_name (abfd, section), | |
274 | name); | |
bb2ec1b3 TT |
275 | } |
276 | ||
277 | /* Helper for link_callbacks callbacks vector. */ | |
278 | ||
77b64a49 PA |
279 | static void link_callbacks_einfo (const char *fmt, ...) |
280 | ATTRIBUTE_PRINTF (1, 2); | |
281 | ||
bb2ec1b3 TT |
282 | static void |
283 | link_callbacks_einfo (const char *fmt, ...) | |
284 | { | |
bb2ec1b3 | 285 | va_list ap; |
bb2ec1b3 TT |
286 | |
287 | va_start (ap, fmt); | |
20dcd8ca | 288 | std::string str = string_vprintf (fmt, ap); |
bb2ec1b3 | 289 | va_end (ap); |
bb2ec1b3 | 290 | |
20dcd8ca | 291 | warning (_("Compile module: warning: %s"), str.c_str ()); |
bb2ec1b3 TT |
292 | } |
293 | ||
294 | /* Helper for bfd_get_relocated_section_contents. | |
295 | Only these symbols are set by bfd_simple_get_relocated_section_contents | |
296 | but bfd/ seems to use even the NULL ones without checking them first. */ | |
297 | ||
298 | static const struct bfd_link_callbacks link_callbacks = | |
299 | { | |
300 | NULL, /* add_archive_element */ | |
301 | link_callbacks_multiple_definition, /* multiple_definition */ | |
302 | NULL, /* multiple_common */ | |
303 | NULL, /* add_to_set */ | |
304 | NULL, /* constructor */ | |
305 | link_callbacks_warning, /* warning */ | |
306 | link_callbacks_undefined_symbol, /* undefined_symbol */ | |
307 | link_callbacks_reloc_overflow, /* reloc_overflow */ | |
308 | link_callbacks_reloc_dangerous, /* reloc_dangerous */ | |
309 | link_callbacks_unattached_reloc, /* unattached_reloc */ | |
310 | NULL, /* notice */ | |
311 | link_callbacks_einfo, /* einfo */ | |
312 | NULL, /* info */ | |
313 | NULL, /* minfo */ | |
314 | NULL, /* override_segment_assignment */ | |
315 | }; | |
316 | ||
317 | struct link_hash_table_cleanup_data | |
318 | { | |
319 | bfd *abfd; | |
320 | bfd *link_next; | |
321 | }; | |
322 | ||
323 | /* Cleanup callback for struct bfd_link_info. */ | |
324 | ||
325 | static void | |
326 | link_hash_table_free (void *d) | |
327 | { | |
9a3c8263 SM |
328 | struct link_hash_table_cleanup_data *data |
329 | = (struct link_hash_table_cleanup_data *) d; | |
bb2ec1b3 TT |
330 | |
331 | if (data->abfd->is_linker_output) | |
332 | (*data->abfd->link.hash->hash_table_free) (data->abfd); | |
333 | data->abfd->link.next = data->link_next; | |
334 | } | |
335 | ||
336 | /* Relocate and store into inferior memory each section SECT of ABFD. */ | |
337 | ||
338 | static void | |
339 | copy_sections (bfd *abfd, asection *sect, void *data) | |
340 | { | |
9a3c8263 | 341 | asymbol **symbol_table = (asymbol **) data; |
bb2ec1b3 TT |
342 | bfd_byte *sect_data, *sect_data_got; |
343 | struct cleanup *cleanups; | |
344 | struct bfd_link_info link_info; | |
345 | struct bfd_link_order link_order; | |
346 | CORE_ADDR inferior_addr; | |
347 | struct link_hash_table_cleanup_data cleanup_data; | |
348 | ||
349 | if ((bfd_get_section_flags (abfd, sect) & (SEC_ALLOC | SEC_LOAD)) | |
350 | != (SEC_ALLOC | SEC_LOAD)) | |
351 | return; | |
352 | ||
353 | if (bfd_get_section_size (sect) == 0) | |
354 | return; | |
355 | ||
356 | /* Mostly a copy of bfd_simple_get_relocated_section_contents which GDB | |
357 | cannot use as it does not report relocations to undefined symbols. */ | |
358 | memset (&link_info, 0, sizeof (link_info)); | |
359 | link_info.output_bfd = abfd; | |
360 | link_info.input_bfds = abfd; | |
361 | link_info.input_bfds_tail = &abfd->link.next; | |
362 | ||
363 | cleanup_data.abfd = abfd; | |
364 | cleanup_data.link_next = abfd->link.next; | |
365 | ||
366 | abfd->link.next = NULL; | |
367 | link_info.hash = bfd_link_hash_table_create (abfd); | |
368 | ||
369 | cleanups = make_cleanup (link_hash_table_free, &cleanup_data); | |
370 | link_info.callbacks = &link_callbacks; | |
371 | ||
372 | memset (&link_order, 0, sizeof (link_order)); | |
373 | link_order.next = NULL; | |
374 | link_order.type = bfd_indirect_link_order; | |
375 | link_order.offset = 0; | |
376 | link_order.size = bfd_get_section_size (sect); | |
377 | link_order.u.indirect.section = sect; | |
378 | ||
224c3ddb | 379 | sect_data = (bfd_byte *) xmalloc (bfd_get_section_size (sect)); |
bb2ec1b3 TT |
380 | make_cleanup (xfree, sect_data); |
381 | ||
382 | sect_data_got = bfd_get_relocated_section_contents (abfd, &link_info, | |
383 | &link_order, sect_data, | |
384 | FALSE, symbol_table); | |
385 | ||
386 | if (sect_data_got == NULL) | |
387 | error (_("Cannot map compiled module \"%s\" section \"%s\": %s"), | |
388 | bfd_get_filename (abfd), bfd_get_section_name (abfd, sect), | |
389 | bfd_errmsg (bfd_get_error ())); | |
390 | gdb_assert (sect_data_got == sect_data); | |
391 | ||
392 | inferior_addr = bfd_get_section_vma (abfd, sect); | |
393 | if (0 != target_write_memory (inferior_addr, sect_data, | |
394 | bfd_get_section_size (sect))) | |
395 | error (_("Cannot write compiled module \"%s\" section \"%s\" " | |
396 | "to inferior memory range %s-%s."), | |
397 | bfd_get_filename (abfd), bfd_get_section_name (abfd, sect), | |
398 | paddress (target_gdbarch (), inferior_addr), | |
399 | paddress (target_gdbarch (), | |
400 | inferior_addr + bfd_get_section_size (sect))); | |
401 | ||
402 | do_cleanups (cleanups); | |
403 | } | |
404 | ||
36de76f9 JK |
405 | /* Fetch the type of COMPILE_I_EXPR_PTR_TYPE and COMPILE_I_EXPR_VAL |
406 | symbols in OBJFILE so we can calculate how much memory to allocate | |
407 | for the out parameter. This avoids needing a malloc in the generated | |
408 | code. Throw an error if anything fails. | |
409 | GDB first tries to compile the code with COMPILE_I_PRINT_ADDRESS_SCOPE. | |
410 | If it finds user tries to print an array type this function returns | |
411 | NULL. Caller will then regenerate the code with | |
412 | COMPILE_I_PRINT_VALUE_SCOPE, recompiles it again and finally runs it. | |
413 | This is because __auto_type array-to-pointer type conversion of | |
414 | COMPILE_I_EXPR_VAL which gets detected by COMPILE_I_EXPR_PTR_TYPE | |
415 | preserving the array type. */ | |
416 | ||
417 | static struct type * | |
418 | get_out_value_type (struct symbol *func_sym, struct objfile *objfile, | |
419 | enum compile_i_scope_types scope) | |
420 | { | |
d976bace JK |
421 | struct symbol *gdb_ptr_type_sym; |
422 | /* Initialize it just to avoid a GCC false warning. */ | |
423 | struct symbol *gdb_val_sym = NULL; | |
4d18dfad | 424 | struct type *gdb_ptr_type, *gdb_type_from_ptr, *gdb_type, *retval; |
d976bace JK |
425 | /* Initialize it just to avoid a GCC false warning. */ |
426 | const struct block *block = NULL; | |
36de76f9 JK |
427 | const struct blockvector *bv; |
428 | int nblocks = 0; | |
429 | int block_loop = 0; | |
430 | ||
431 | bv = SYMTAB_BLOCKVECTOR (func_sym->owner.symtab); | |
432 | nblocks = BLOCKVECTOR_NBLOCKS (bv); | |
433 | ||
434 | gdb_ptr_type_sym = NULL; | |
435 | for (block_loop = 0; block_loop < nblocks; block_loop++) | |
436 | { | |
d976bace | 437 | struct symbol *function = NULL; |
36de76f9 JK |
438 | const struct block *function_block; |
439 | ||
440 | block = BLOCKVECTOR_BLOCK (bv, block_loop); | |
441 | if (BLOCK_FUNCTION (block) != NULL) | |
442 | continue; | |
de63c46b PA |
443 | gdb_val_sym = block_lookup_symbol (block, |
444 | COMPILE_I_EXPR_VAL, | |
445 | symbol_name_match_type::SEARCH_NAME, | |
446 | VAR_DOMAIN); | |
36de76f9 JK |
447 | if (gdb_val_sym == NULL) |
448 | continue; | |
449 | ||
450 | function_block = block; | |
451 | while (function_block != BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK) | |
452 | && function_block != BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK)) | |
453 | { | |
454 | function_block = BLOCK_SUPERBLOCK (function_block); | |
455 | function = BLOCK_FUNCTION (function_block); | |
456 | if (function != NULL) | |
457 | break; | |
458 | } | |
459 | if (function != NULL | |
460 | && (BLOCK_SUPERBLOCK (function_block) | |
461 | == BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK)) | |
462 | && (strcmp (SYMBOL_LINKAGE_NAME (function), GCC_FE_WRAPPER_FUNCTION) | |
463 | == 0)) | |
464 | break; | |
465 | } | |
466 | if (block_loop == nblocks) | |
467 | error (_("No \"%s\" symbol found"), COMPILE_I_EXPR_PTR_TYPE); | |
468 | ||
469 | gdb_type = SYMBOL_TYPE (gdb_val_sym); | |
f168693b | 470 | gdb_type = check_typedef (gdb_type); |
36de76f9 JK |
471 | |
472 | gdb_ptr_type_sym = block_lookup_symbol (block, COMPILE_I_EXPR_PTR_TYPE, | |
de63c46b | 473 | symbol_name_match_type::SEARCH_NAME, |
36de76f9 JK |
474 | VAR_DOMAIN); |
475 | if (gdb_ptr_type_sym == NULL) | |
476 | error (_("No \"%s\" symbol found"), COMPILE_I_EXPR_PTR_TYPE); | |
477 | gdb_ptr_type = SYMBOL_TYPE (gdb_ptr_type_sym); | |
f168693b | 478 | gdb_ptr_type = check_typedef (gdb_ptr_type); |
36de76f9 JK |
479 | if (TYPE_CODE (gdb_ptr_type) != TYPE_CODE_PTR) |
480 | error (_("Type of \"%s\" is not a pointer"), COMPILE_I_EXPR_PTR_TYPE); | |
481 | gdb_type_from_ptr = TYPE_TARGET_TYPE (gdb_ptr_type); | |
482 | ||
483 | if (types_deeply_equal (gdb_type, gdb_type_from_ptr)) | |
484 | { | |
485 | if (scope != COMPILE_I_PRINT_ADDRESS_SCOPE) | |
486 | error (_("Expected address scope in compiled module \"%s\"."), | |
487 | objfile_name (objfile)); | |
488 | return gdb_type; | |
489 | } | |
490 | ||
491 | if (TYPE_CODE (gdb_type) != TYPE_CODE_PTR) | |
492 | error (_("Invalid type code %d of symbol \"%s\" " | |
493 | "in compiled module \"%s\"."), | |
494 | TYPE_CODE (gdb_type_from_ptr), COMPILE_I_EXPR_VAL, | |
495 | objfile_name (objfile)); | |
496 | ||
4d18dfad | 497 | retval = gdb_type_from_ptr; |
36de76f9 JK |
498 | switch (TYPE_CODE (gdb_type_from_ptr)) |
499 | { | |
500 | case TYPE_CODE_ARRAY: | |
501 | gdb_type_from_ptr = TYPE_TARGET_TYPE (gdb_type_from_ptr); | |
502 | break; | |
503 | case TYPE_CODE_FUNC: | |
504 | break; | |
505 | default: | |
506 | error (_("Invalid type code %d of symbol \"%s\" " | |
507 | "in compiled module \"%s\"."), | |
508 | TYPE_CODE (gdb_type_from_ptr), COMPILE_I_EXPR_PTR_TYPE, | |
509 | objfile_name (objfile)); | |
510 | } | |
511 | if (!types_deeply_equal (gdb_type_from_ptr, | |
512 | TYPE_TARGET_TYPE (gdb_type))) | |
513 | error (_("Referenced types do not match for symbols \"%s\" and \"%s\" " | |
514 | "in compiled module \"%s\"."), | |
515 | COMPILE_I_EXPR_PTR_TYPE, COMPILE_I_EXPR_VAL, | |
516 | objfile_name (objfile)); | |
517 | if (scope == COMPILE_I_PRINT_ADDRESS_SCOPE) | |
518 | return NULL; | |
4d18dfad | 519 | return retval; |
36de76f9 JK |
520 | } |
521 | ||
83d3415e JK |
522 | /* Fetch the type of first parameter of FUNC_SYM. |
523 | Return NULL if FUNC_SYM has no parameters. Throw an error otherwise. */ | |
bb2ec1b3 TT |
524 | |
525 | static struct type * | |
83d3415e | 526 | get_regs_type (struct symbol *func_sym, struct objfile *objfile) |
bb2ec1b3 | 527 | { |
83d3415e JK |
528 | struct type *func_type = SYMBOL_TYPE (func_sym); |
529 | struct type *regsp_type, *regs_type; | |
bb2ec1b3 TT |
530 | |
531 | /* No register parameter present. */ | |
532 | if (TYPE_NFIELDS (func_type) == 0) | |
533 | return NULL; | |
534 | ||
bb2ec1b3 TT |
535 | regsp_type = check_typedef (TYPE_FIELD_TYPE (func_type, 0)); |
536 | if (TYPE_CODE (regsp_type) != TYPE_CODE_PTR) | |
537 | error (_("Invalid type code %d of first parameter of function \"%s\" " | |
538 | "in compiled module \"%s\"."), | |
539 | TYPE_CODE (regsp_type), GCC_FE_WRAPPER_FUNCTION, | |
540 | objfile_name (objfile)); | |
541 | ||
542 | regs_type = check_typedef (TYPE_TARGET_TYPE (regsp_type)); | |
543 | if (TYPE_CODE (regs_type) != TYPE_CODE_STRUCT) | |
544 | error (_("Invalid type code %d of dereferenced first parameter " | |
545 | "of function \"%s\" in compiled module \"%s\"."), | |
546 | TYPE_CODE (regs_type), GCC_FE_WRAPPER_FUNCTION, | |
547 | objfile_name (objfile)); | |
548 | ||
549 | return regs_type; | |
550 | } | |
551 | ||
552 | /* Store all inferior registers required by REGS_TYPE to inferior memory | |
553 | starting at inferior address REGS_BASE. */ | |
554 | ||
555 | static void | |
556 | store_regs (struct type *regs_type, CORE_ADDR regs_base) | |
557 | { | |
558 | struct gdbarch *gdbarch = target_gdbarch (); | |
bb2ec1b3 TT |
559 | int fieldno; |
560 | ||
561 | for (fieldno = 0; fieldno < TYPE_NFIELDS (regs_type); fieldno++) | |
562 | { | |
563 | const char *reg_name = TYPE_FIELD_NAME (regs_type, fieldno); | |
564 | ULONGEST reg_bitpos = TYPE_FIELD_BITPOS (regs_type, fieldno); | |
565 | ULONGEST reg_bitsize = TYPE_FIELD_BITSIZE (regs_type, fieldno); | |
566 | ULONGEST reg_offset; | |
567 | struct type *reg_type = check_typedef (TYPE_FIELD_TYPE (regs_type, | |
568 | fieldno)); | |
569 | ULONGEST reg_size = TYPE_LENGTH (reg_type); | |
570 | int regnum; | |
571 | struct value *regval; | |
572 | CORE_ADDR inferior_addr; | |
573 | ||
574 | if (strcmp (reg_name, COMPILE_I_SIMPLE_REGISTER_DUMMY) == 0) | |
575 | continue; | |
576 | ||
577 | if ((reg_bitpos % 8) != 0 || reg_bitsize != 0) | |
578 | error (_("Invalid register \"%s\" position %s bits or size %s bits"), | |
579 | reg_name, pulongest (reg_bitpos), pulongest (reg_bitsize)); | |
580 | reg_offset = reg_bitpos / 8; | |
581 | ||
582 | if (TYPE_CODE (reg_type) != TYPE_CODE_INT | |
583 | && TYPE_CODE (reg_type) != TYPE_CODE_PTR) | |
584 | error (_("Invalid register \"%s\" type code %d"), reg_name, | |
585 | TYPE_CODE (reg_type)); | |
586 | ||
587 | regnum = compile_register_name_demangle (gdbarch, reg_name); | |
588 | ||
589 | regval = value_from_register (reg_type, regnum, get_current_frame ()); | |
590 | if (value_optimized_out (regval)) | |
591 | error (_("Register \"%s\" is optimized out."), reg_name); | |
592 | if (!value_entirely_available (regval)) | |
593 | error (_("Register \"%s\" is not available."), reg_name); | |
594 | ||
595 | inferior_addr = regs_base + reg_offset; | |
596 | if (0 != target_write_memory (inferior_addr, value_contents (regval), | |
597 | reg_size)) | |
598 | error (_("Cannot write register \"%s\" to inferior memory at %s."), | |
599 | reg_name, paddress (gdbarch, inferior_addr)); | |
600 | } | |
601 | } | |
602 | ||
aaee65ae PA |
603 | /* Load the object file specified in FILE_NAMES into inferior memory. |
604 | Throw an error otherwise. Caller must fully dispose the return | |
605 | value by calling compile_object_run. Returns NULL only for | |
606 | COMPILE_I_PRINT_ADDRESS_SCOPE when COMPILE_I_PRINT_VALUE_SCOPE | |
607 | should have been used instead. */ | |
bb2ec1b3 TT |
608 | |
609 | struct compile_module * | |
aaee65ae | 610 | compile_object_load (const compile_file_names &file_names, |
5c65b58a | 611 | enum compile_i_scope_types scope, void *scope_data) |
bb2ec1b3 | 612 | { |
ed2b3126 | 613 | struct cleanup *cleanups; |
bb2ec1b3 | 614 | struct setup_sections_data setup_sections_data; |
798a7429 | 615 | CORE_ADDR regs_addr, out_value_addr = 0; |
83d3415e JK |
616 | struct symbol *func_sym; |
617 | struct type *func_type; | |
bb2ec1b3 TT |
618 | struct bound_minimal_symbol bmsym; |
619 | long storage_needed; | |
620 | asymbol **symbol_table, **symp; | |
621 | long number_of_symbols, missing_symbols; | |
bb2ec1b3 | 622 | struct compile_module *retval; |
36de76f9 | 623 | struct type *regs_type, *out_value_type = NULL; |
ee0c3293 | 624 | char **matching; |
bb2ec1b3 | 625 | struct objfile *objfile; |
83d3415e JK |
626 | int expect_parameters; |
627 | struct type *expect_return_type; | |
7f361056 | 628 | struct munmap_list *munmap_list_head = NULL; |
bb2ec1b3 | 629 | |
ee0c3293 TT |
630 | gdb::unique_xmalloc_ptr<char> filename |
631 | (tilde_expand (file_names.object_file ())); | |
bb2ec1b3 | 632 | |
ee0c3293 | 633 | gdb_bfd_ref_ptr abfd (gdb_bfd_open (filename.get (), gnutarget, -1)); |
bb2ec1b3 TT |
634 | if (abfd == NULL) |
635 | error (_("\"%s\": could not open as compiled module: %s"), | |
ee0c3293 | 636 | filename.get (), bfd_errmsg (bfd_get_error ())); |
bb2ec1b3 | 637 | |
192b62ce | 638 | if (!bfd_check_format_matches (abfd.get (), bfd_object, &matching)) |
bb2ec1b3 | 639 | error (_("\"%s\": not in loadable format: %s"), |
ee0c3293 | 640 | filename.get (), gdb_bfd_errmsg (bfd_get_error (), matching)); |
bb2ec1b3 | 641 | |
192b62ce | 642 | if ((bfd_get_file_flags (abfd.get ()) & (EXEC_P | DYNAMIC)) != 0) |
ee0c3293 | 643 | error (_("\"%s\": not in object format."), filename.get ()); |
bb2ec1b3 TT |
644 | |
645 | setup_sections_data.last_size = 0; | |
646 | setup_sections_data.last_section_first = abfd->sections; | |
647 | setup_sections_data.last_prot = -1; | |
648 | setup_sections_data.last_max_alignment = 1; | |
7f361056 | 649 | setup_sections_data.munmap_list_headp = &munmap_list_head; |
ee0c3293 | 650 | cleanups = make_cleanup (munmap_listp_free_cleanup, &munmap_list_head); |
192b62ce TT |
651 | bfd_map_over_sections (abfd.get (), setup_sections, &setup_sections_data); |
652 | setup_sections (abfd.get (), NULL, &setup_sections_data); | |
bb2ec1b3 | 653 | |
192b62ce | 654 | storage_needed = bfd_get_symtab_upper_bound (abfd.get ()); |
bb2ec1b3 TT |
655 | if (storage_needed < 0) |
656 | error (_("Cannot read symbols of compiled module \"%s\": %s"), | |
ee0c3293 | 657 | filename.get (), bfd_errmsg (bfd_get_error ())); |
bb2ec1b3 TT |
658 | |
659 | /* SYMFILE_VERBOSE is not passed even if FROM_TTY, user is not interested in | |
660 | "Reading symbols from ..." message for automatically generated file. */ | |
ed2b3126 TT |
661 | std::unique_ptr<struct objfile> objfile_holder |
662 | (symbol_file_add_from_bfd (abfd.get (), filename.get (), | |
663 | 0, NULL, 0, NULL)); | |
664 | objfile = objfile_holder.get (); | |
bb2ec1b3 | 665 | |
83d3415e JK |
666 | func_sym = lookup_global_symbol_from_objfile (objfile, |
667 | GCC_FE_WRAPPER_FUNCTION, | |
d12307c1 | 668 | VAR_DOMAIN).symbol; |
83d3415e JK |
669 | if (func_sym == NULL) |
670 | error (_("Cannot find function \"%s\" in compiled module \"%s\"."), | |
671 | GCC_FE_WRAPPER_FUNCTION, objfile_name (objfile)); | |
672 | func_type = SYMBOL_TYPE (func_sym); | |
673 | if (TYPE_CODE (func_type) != TYPE_CODE_FUNC) | |
674 | error (_("Invalid type code %d of function \"%s\" in compiled " | |
675 | "module \"%s\"."), | |
676 | TYPE_CODE (func_type), GCC_FE_WRAPPER_FUNCTION, | |
677 | objfile_name (objfile)); | |
678 | ||
679 | switch (scope) | |
680 | { | |
681 | case COMPILE_I_SIMPLE_SCOPE: | |
682 | expect_parameters = 1; | |
683 | expect_return_type = builtin_type (target_gdbarch ())->builtin_void; | |
684 | break; | |
685 | case COMPILE_I_RAW_SCOPE: | |
686 | expect_parameters = 0; | |
687 | expect_return_type = builtin_type (target_gdbarch ())->builtin_void; | |
688 | break; | |
36de76f9 JK |
689 | case COMPILE_I_PRINT_ADDRESS_SCOPE: |
690 | case COMPILE_I_PRINT_VALUE_SCOPE: | |
691 | expect_parameters = 2; | |
692 | expect_return_type = builtin_type (target_gdbarch ())->builtin_void; | |
693 | break; | |
83d3415e JK |
694 | default: |
695 | internal_error (__FILE__, __LINE__, _("invalid scope %d"), scope); | |
696 | } | |
697 | if (TYPE_NFIELDS (func_type) != expect_parameters) | |
698 | error (_("Invalid %d parameters of function \"%s\" in compiled " | |
699 | "module \"%s\"."), | |
700 | TYPE_NFIELDS (func_type), GCC_FE_WRAPPER_FUNCTION, | |
701 | objfile_name (objfile)); | |
702 | if (!types_deeply_equal (expect_return_type, TYPE_TARGET_TYPE (func_type))) | |
703 | error (_("Invalid return type of function \"%s\" in compiled " | |
704 | "module \"%s\"."), | |
705 | GCC_FE_WRAPPER_FUNCTION, objfile_name (objfile)); | |
bb2ec1b3 TT |
706 | |
707 | /* The memory may be later needed | |
708 | by bfd_generic_get_relocated_section_contents | |
709 | called from default_symfile_relocate. */ | |
224c3ddb SM |
710 | symbol_table = (asymbol **) obstack_alloc (&objfile->objfile_obstack, |
711 | storage_needed); | |
192b62ce | 712 | number_of_symbols = bfd_canonicalize_symtab (abfd.get (), symbol_table); |
bb2ec1b3 TT |
713 | if (number_of_symbols < 0) |
714 | error (_("Cannot parse symbols of compiled module \"%s\": %s"), | |
ee0c3293 | 715 | filename.get (), bfd_errmsg (bfd_get_error ())); |
bb2ec1b3 TT |
716 | |
717 | missing_symbols = 0; | |
718 | for (symp = symbol_table; symp < symbol_table + number_of_symbols; symp++) | |
719 | { | |
720 | asymbol *sym = *symp; | |
721 | ||
722 | if (sym->flags != 0) | |
723 | continue; | |
bb2ec1b3 TT |
724 | sym->flags = BSF_GLOBAL; |
725 | sym->section = bfd_abs_section_ptr; | |
726 | if (strcmp (sym->name, "_GLOBAL_OFFSET_TABLE_") == 0) | |
727 | { | |
b0fd6b30 JK |
728 | if (compile_debug) |
729 | fprintf_unfiltered (gdb_stdlog, | |
730 | "ELF symbol \"%s\" relocated to zero\n", | |
731 | sym->name); | |
732 | ||
733 | /* It seems to be a GCC bug, with -mcmodel=large there should be no | |
734 | need for _GLOBAL_OFFSET_TABLE_. Together with -fPIE the data | |
735 | remain PC-relative even with _GLOBAL_OFFSET_TABLE_ as zero. */ | |
bb2ec1b3 TT |
736 | sym->value = 0; |
737 | continue; | |
738 | } | |
739 | bmsym = lookup_minimal_symbol (sym->name, NULL, NULL); | |
740 | switch (bmsym.minsym == NULL | |
741 | ? mst_unknown : MSYMBOL_TYPE (bmsym.minsym)) | |
742 | { | |
743 | case mst_text: | |
744 | sym->value = BMSYMBOL_VALUE_ADDRESS (bmsym); | |
b0fd6b30 JK |
745 | if (compile_debug) |
746 | fprintf_unfiltered (gdb_stdlog, | |
747 | "ELF mst_text symbol \"%s\" relocated to %s\n", | |
748 | sym->name, | |
749 | paddress (target_gdbarch (), sym->value)); | |
bb2ec1b3 | 750 | break; |
e26efa40 JK |
751 | case mst_text_gnu_ifunc: |
752 | sym->value = gnu_ifunc_resolve_addr (target_gdbarch (), | |
753 | BMSYMBOL_VALUE_ADDRESS (bmsym)); | |
b0fd6b30 JK |
754 | if (compile_debug) |
755 | fprintf_unfiltered (gdb_stdlog, | |
756 | "ELF mst_text_gnu_ifunc symbol \"%s\" " | |
757 | "relocated to %s\n", | |
758 | sym->name, | |
759 | paddress (target_gdbarch (), sym->value)); | |
e26efa40 | 760 | break; |
bb2ec1b3 TT |
761 | default: |
762 | warning (_("Could not find symbol \"%s\" " | |
763 | "for compiled module \"%s\"."), | |
ee0c3293 | 764 | sym->name, filename.get ()); |
bb2ec1b3 TT |
765 | missing_symbols++; |
766 | } | |
767 | } | |
768 | if (missing_symbols) | |
769 | error (_("%ld symbols were missing, cannot continue."), missing_symbols); | |
770 | ||
192b62ce | 771 | bfd_map_over_sections (abfd.get (), copy_sections, symbol_table); |
bb2ec1b3 | 772 | |
83d3415e | 773 | regs_type = get_regs_type (func_sym, objfile); |
bb2ec1b3 TT |
774 | if (regs_type == NULL) |
775 | regs_addr = 0; | |
776 | else | |
777 | { | |
778 | /* Use read-only non-executable memory protection. */ | |
779 | regs_addr = gdbarch_infcall_mmap (target_gdbarch (), | |
780 | TYPE_LENGTH (regs_type), | |
781 | GDB_MMAP_PROT_READ); | |
782 | gdb_assert (regs_addr != 0); | |
7f361056 | 783 | munmap_list_add (&munmap_list_head, regs_addr, TYPE_LENGTH (regs_type)); |
b6de3f96 | 784 | if (compile_debug) |
a4063588 | 785 | fprintf_unfiltered (gdb_stdlog, |
b6de3f96 JK |
786 | "allocated %s bytes at %s for registers\n", |
787 | paddress (target_gdbarch (), | |
788 | TYPE_LENGTH (regs_type)), | |
789 | paddress (target_gdbarch (), regs_addr)); | |
bb2ec1b3 TT |
790 | store_regs (regs_type, regs_addr); |
791 | } | |
792 | ||
36de76f9 JK |
793 | if (scope == COMPILE_I_PRINT_ADDRESS_SCOPE |
794 | || scope == COMPILE_I_PRINT_VALUE_SCOPE) | |
795 | { | |
796 | out_value_type = get_out_value_type (func_sym, objfile, scope); | |
797 | if (out_value_type == NULL) | |
798 | { | |
799 | do_cleanups (cleanups); | |
800 | return NULL; | |
801 | } | |
802 | check_typedef (out_value_type); | |
803 | out_value_addr = gdbarch_infcall_mmap (target_gdbarch (), | |
804 | TYPE_LENGTH (out_value_type), | |
805 | (GDB_MMAP_PROT_READ | |
806 | | GDB_MMAP_PROT_WRITE)); | |
807 | gdb_assert (out_value_addr != 0); | |
7f361056 JK |
808 | munmap_list_add (&munmap_list_head, out_value_addr, |
809 | TYPE_LENGTH (out_value_type)); | |
36de76f9 | 810 | if (compile_debug) |
a4063588 | 811 | fprintf_unfiltered (gdb_stdlog, |
36de76f9 JK |
812 | "allocated %s bytes at %s for printed value\n", |
813 | paddress (target_gdbarch (), | |
814 | TYPE_LENGTH (out_value_type)), | |
815 | paddress (target_gdbarch (), out_value_addr)); | |
816 | } | |
817 | ||
8d749320 | 818 | retval = XNEW (struct compile_module); |
ed2b3126 | 819 | retval->objfile = objfile_holder.release (); |
aaee65ae | 820 | retval->source_file = xstrdup (file_names.source_file ()); |
83d3415e | 821 | retval->func_sym = func_sym; |
bb2ec1b3 | 822 | retval->regs_addr = regs_addr; |
5c65b58a JK |
823 | retval->scope = scope; |
824 | retval->scope_data = scope_data; | |
36de76f9 JK |
825 | retval->out_value_type = out_value_type; |
826 | retval->out_value_addr = out_value_addr; | |
7f361056 JK |
827 | |
828 | /* CLEANUPS will free MUNMAP_LIST_HEAD. */ | |
829 | retval->munmap_list_head = munmap_list_head; | |
830 | munmap_list_head = NULL; | |
831 | ||
832 | do_cleanups (cleanups); | |
833 | ||
bb2ec1b3 TT |
834 | return retval; |
835 | } |