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 | |
c9e0a7e3 TT |
37 | /* Add inferior mmap memory range ADDR..ADDR+SIZE (exclusive) to the |
38 | list. */ | |
7f361056 JK |
39 | |
40 | void | |
c9e0a7e3 | 41 | munmap_list::add (CORE_ADDR addr, CORE_ADDR size) |
7f361056 | 42 | { |
c9e0a7e3 TT |
43 | struct munmap_item item = { addr, size }; |
44 | items.push_back (item); | |
7f361056 JK |
45 | } |
46 | ||
c9e0a7e3 | 47 | /* Destroy an munmap_list. */ |
7f361056 | 48 | |
c9e0a7e3 | 49 | munmap_list::~munmap_list () |
7f361056 | 50 | { |
c9e0a7e3 TT |
51 | for (auto &item : items) |
52 | gdbarch_infcall_munmap (target_gdbarch (), item.addr, item.size); | |
7f361056 JK |
53 | } |
54 | ||
bb2ec1b3 TT |
55 | /* Helper data for setup_sections. */ |
56 | ||
57 | struct setup_sections_data | |
58 | { | |
59 | /* Size of all recent sections with matching LAST_PROT. */ | |
60 | CORE_ADDR last_size; | |
61 | ||
62 | /* First section matching LAST_PROT. */ | |
63 | asection *last_section_first; | |
64 | ||
65 | /* Memory protection like the prot parameter of gdbarch_infcall_mmap. */ | |
66 | unsigned last_prot; | |
67 | ||
68 | /* Maximum of alignments of all sections matching LAST_PROT. | |
69 | This value is always at least 1. This value is always a power of 2. */ | |
70 | CORE_ADDR last_max_alignment; | |
7f361056 JK |
71 | |
72 | /* List of inferior mmap ranges where setup_sections should add its | |
73 | next range. */ | |
c9e0a7e3 | 74 | std::unique_ptr<struct munmap_list> munmap_list; |
bb2ec1b3 TT |
75 | }; |
76 | ||
77 | /* Place all ABFD sections next to each other obeying all constraints. */ | |
78 | ||
79 | static void | |
80 | setup_sections (bfd *abfd, asection *sect, void *data_voidp) | |
81 | { | |
9a3c8263 | 82 | struct setup_sections_data *data = (struct setup_sections_data *) data_voidp; |
bb2ec1b3 TT |
83 | CORE_ADDR alignment; |
84 | unsigned prot; | |
85 | ||
86 | if (sect != NULL) | |
87 | { | |
88 | /* It is required by later bfd_get_relocated_section_contents. */ | |
89 | if (sect->output_section == NULL) | |
90 | sect->output_section = sect; | |
91 | ||
92 | if ((bfd_get_section_flags (abfd, sect) & SEC_ALLOC) == 0) | |
93 | return; | |
94 | ||
bb2b33b9 | 95 | /* Make the memory always readable. */ |
bb2ec1b3 TT |
96 | prot = GDB_MMAP_PROT_READ; |
97 | if ((bfd_get_section_flags (abfd, sect) & SEC_READONLY) == 0) | |
98 | prot |= GDB_MMAP_PROT_WRITE; | |
99 | if ((bfd_get_section_flags (abfd, sect) & SEC_CODE) != 0) | |
100 | prot |= GDB_MMAP_PROT_EXEC; | |
101 | ||
102 | if (compile_debug) | |
a4063588 | 103 | fprintf_unfiltered (gdb_stdlog, |
bb2ec1b3 TT |
104 | "module \"%s\" section \"%s\" size %s prot %u\n", |
105 | bfd_get_filename (abfd), | |
106 | bfd_get_section_name (abfd, sect), | |
107 | paddress (target_gdbarch (), | |
108 | bfd_get_section_size (sect)), | |
109 | prot); | |
110 | } | |
111 | else | |
112 | prot = -1; | |
113 | ||
114 | if (sect == NULL | |
115 | || (data->last_prot != prot && bfd_get_section_size (sect) != 0)) | |
116 | { | |
117 | CORE_ADDR addr; | |
118 | asection *sect_iter; | |
119 | ||
120 | if (data->last_size != 0) | |
121 | { | |
122 | addr = gdbarch_infcall_mmap (target_gdbarch (), data->last_size, | |
123 | data->last_prot); | |
c9e0a7e3 | 124 | data->munmap_list->add (addr, data->last_size); |
bb2ec1b3 | 125 | if (compile_debug) |
a4063588 | 126 | fprintf_unfiltered (gdb_stdlog, |
bb2ec1b3 TT |
127 | "allocated %s bytes at %s prot %u\n", |
128 | paddress (target_gdbarch (), data->last_size), | |
129 | paddress (target_gdbarch (), addr), | |
130 | data->last_prot); | |
131 | } | |
132 | else | |
133 | addr = 0; | |
134 | ||
135 | if ((addr & (data->last_max_alignment - 1)) != 0) | |
136 | error (_("Inferior compiled module address %s " | |
137 | "is not aligned to BFD required %s."), | |
138 | paddress (target_gdbarch (), addr), | |
139 | paddress (target_gdbarch (), data->last_max_alignment)); | |
140 | ||
141 | for (sect_iter = data->last_section_first; sect_iter != sect; | |
142 | sect_iter = sect_iter->next) | |
143 | if ((bfd_get_section_flags (abfd, sect_iter) & SEC_ALLOC) != 0) | |
144 | bfd_set_section_vma (abfd, sect_iter, | |
145 | addr + bfd_get_section_vma (abfd, sect_iter)); | |
146 | ||
147 | data->last_size = 0; | |
148 | data->last_section_first = sect; | |
149 | data->last_prot = prot; | |
150 | data->last_max_alignment = 1; | |
151 | } | |
152 | ||
153 | if (sect == NULL) | |
154 | return; | |
155 | ||
156 | alignment = ((CORE_ADDR) 1) << bfd_get_section_alignment (abfd, sect); | |
325fac50 | 157 | data->last_max_alignment = std::max (data->last_max_alignment, alignment); |
bb2ec1b3 TT |
158 | |
159 | data->last_size = (data->last_size + alignment - 1) & -alignment; | |
160 | ||
161 | bfd_set_section_vma (abfd, sect, data->last_size); | |
162 | ||
163 | data->last_size += bfd_get_section_size (sect); | |
164 | data->last_size = (data->last_size + alignment - 1) & -alignment; | |
165 | } | |
166 | ||
167 | /* Helper for link_callbacks callbacks vector. */ | |
168 | ||
1a72702b | 169 | static void |
bb2ec1b3 TT |
170 | link_callbacks_multiple_definition (struct bfd_link_info *link_info, |
171 | struct bfd_link_hash_entry *h, bfd *nbfd, | |
172 | asection *nsec, bfd_vma nval) | |
173 | { | |
174 | bfd *abfd = link_info->input_bfds; | |
175 | ||
176 | if (link_info->allow_multiple_definition) | |
1a72702b | 177 | return; |
8e8347b8 | 178 | warning (_("Compiled module \"%s\": multiple symbol definitions: %s"), |
bb2ec1b3 | 179 | bfd_get_filename (abfd), h->root.string); |
bb2ec1b3 TT |
180 | } |
181 | ||
182 | /* Helper for link_callbacks callbacks vector. */ | |
183 | ||
1a72702b | 184 | static void |
bb2ec1b3 TT |
185 | link_callbacks_warning (struct bfd_link_info *link_info, const char *xwarning, |
186 | const char *symbol, bfd *abfd, asection *section, | |
187 | bfd_vma address) | |
188 | { | |
8e8347b8 | 189 | warning (_("Compiled module \"%s\" section \"%s\": warning: %s"), |
bb2ec1b3 TT |
190 | bfd_get_filename (abfd), bfd_get_section_name (abfd, section), |
191 | xwarning); | |
bb2ec1b3 TT |
192 | } |
193 | ||
194 | /* Helper for link_callbacks callbacks vector. */ | |
195 | ||
1a72702b | 196 | static void |
bb2ec1b3 TT |
197 | link_callbacks_undefined_symbol (struct bfd_link_info *link_info, |
198 | const char *name, bfd *abfd, asection *section, | |
199 | bfd_vma address, bfd_boolean is_fatal) | |
200 | { | |
201 | warning (_("Cannot resolve relocation to \"%s\" " | |
202 | "from compiled module \"%s\" section \"%s\"."), | |
203 | name, bfd_get_filename (abfd), bfd_get_section_name (abfd, section)); | |
bb2ec1b3 TT |
204 | } |
205 | ||
206 | /* Helper for link_callbacks callbacks vector. */ | |
207 | ||
1a72702b | 208 | static void |
bb2ec1b3 TT |
209 | link_callbacks_reloc_overflow (struct bfd_link_info *link_info, |
210 | struct bfd_link_hash_entry *entry, | |
211 | const char *name, const char *reloc_name, | |
212 | bfd_vma addend, bfd *abfd, asection *section, | |
213 | bfd_vma address) | |
214 | { | |
bb2ec1b3 TT |
215 | } |
216 | ||
217 | /* Helper for link_callbacks callbacks vector. */ | |
218 | ||
1a72702b | 219 | static void |
bb2ec1b3 TT |
220 | link_callbacks_reloc_dangerous (struct bfd_link_info *link_info, |
221 | const char *message, bfd *abfd, | |
222 | asection *section, bfd_vma address) | |
223 | { | |
224 | warning (_("Compiled module \"%s\" section \"%s\": dangerous " | |
225 | "relocation: %s\n"), | |
226 | bfd_get_filename (abfd), bfd_get_section_name (abfd, section), | |
227 | message); | |
bb2ec1b3 TT |
228 | } |
229 | ||
230 | /* Helper for link_callbacks callbacks vector. */ | |
231 | ||
1a72702b | 232 | static void |
bb2ec1b3 TT |
233 | link_callbacks_unattached_reloc (struct bfd_link_info *link_info, |
234 | const char *name, bfd *abfd, asection *section, | |
235 | bfd_vma address) | |
236 | { | |
237 | warning (_("Compiled module \"%s\" section \"%s\": unattached " | |
238 | "relocation: %s\n"), | |
239 | bfd_get_filename (abfd), bfd_get_section_name (abfd, section), | |
240 | name); | |
bb2ec1b3 TT |
241 | } |
242 | ||
243 | /* Helper for link_callbacks callbacks vector. */ | |
244 | ||
77b64a49 PA |
245 | static void link_callbacks_einfo (const char *fmt, ...) |
246 | ATTRIBUTE_PRINTF (1, 2); | |
247 | ||
bb2ec1b3 TT |
248 | static void |
249 | link_callbacks_einfo (const char *fmt, ...) | |
250 | { | |
bb2ec1b3 | 251 | va_list ap; |
bb2ec1b3 TT |
252 | |
253 | va_start (ap, fmt); | |
20dcd8ca | 254 | std::string str = string_vprintf (fmt, ap); |
bb2ec1b3 | 255 | va_end (ap); |
bb2ec1b3 | 256 | |
20dcd8ca | 257 | warning (_("Compile module: warning: %s"), str.c_str ()); |
bb2ec1b3 TT |
258 | } |
259 | ||
260 | /* Helper for bfd_get_relocated_section_contents. | |
261 | Only these symbols are set by bfd_simple_get_relocated_section_contents | |
262 | but bfd/ seems to use even the NULL ones without checking them first. */ | |
263 | ||
264 | static const struct bfd_link_callbacks link_callbacks = | |
265 | { | |
266 | NULL, /* add_archive_element */ | |
267 | link_callbacks_multiple_definition, /* multiple_definition */ | |
268 | NULL, /* multiple_common */ | |
269 | NULL, /* add_to_set */ | |
270 | NULL, /* constructor */ | |
271 | link_callbacks_warning, /* warning */ | |
272 | link_callbacks_undefined_symbol, /* undefined_symbol */ | |
273 | link_callbacks_reloc_overflow, /* reloc_overflow */ | |
274 | link_callbacks_reloc_dangerous, /* reloc_dangerous */ | |
275 | link_callbacks_unattached_reloc, /* unattached_reloc */ | |
276 | NULL, /* notice */ | |
277 | link_callbacks_einfo, /* einfo */ | |
278 | NULL, /* info */ | |
279 | NULL, /* minfo */ | |
280 | NULL, /* override_segment_assignment */ | |
281 | }; | |
282 | ||
283 | struct link_hash_table_cleanup_data | |
284 | { | |
285 | bfd *abfd; | |
286 | bfd *link_next; | |
287 | }; | |
288 | ||
289 | /* Cleanup callback for struct bfd_link_info. */ | |
290 | ||
291 | static void | |
292 | link_hash_table_free (void *d) | |
293 | { | |
9a3c8263 SM |
294 | struct link_hash_table_cleanup_data *data |
295 | = (struct link_hash_table_cleanup_data *) d; | |
bb2ec1b3 TT |
296 | |
297 | if (data->abfd->is_linker_output) | |
298 | (*data->abfd->link.hash->hash_table_free) (data->abfd); | |
299 | data->abfd->link.next = data->link_next; | |
300 | } | |
301 | ||
302 | /* Relocate and store into inferior memory each section SECT of ABFD. */ | |
303 | ||
304 | static void | |
305 | copy_sections (bfd *abfd, asection *sect, void *data) | |
306 | { | |
9a3c8263 | 307 | asymbol **symbol_table = (asymbol **) data; |
bb2ec1b3 TT |
308 | bfd_byte *sect_data, *sect_data_got; |
309 | struct cleanup *cleanups; | |
310 | struct bfd_link_info link_info; | |
311 | struct bfd_link_order link_order; | |
312 | CORE_ADDR inferior_addr; | |
313 | struct link_hash_table_cleanup_data cleanup_data; | |
314 | ||
315 | if ((bfd_get_section_flags (abfd, sect) & (SEC_ALLOC | SEC_LOAD)) | |
316 | != (SEC_ALLOC | SEC_LOAD)) | |
317 | return; | |
318 | ||
319 | if (bfd_get_section_size (sect) == 0) | |
320 | return; | |
321 | ||
322 | /* Mostly a copy of bfd_simple_get_relocated_section_contents which GDB | |
323 | cannot use as it does not report relocations to undefined symbols. */ | |
324 | memset (&link_info, 0, sizeof (link_info)); | |
325 | link_info.output_bfd = abfd; | |
326 | link_info.input_bfds = abfd; | |
327 | link_info.input_bfds_tail = &abfd->link.next; | |
328 | ||
329 | cleanup_data.abfd = abfd; | |
330 | cleanup_data.link_next = abfd->link.next; | |
331 | ||
332 | abfd->link.next = NULL; | |
333 | link_info.hash = bfd_link_hash_table_create (abfd); | |
334 | ||
335 | cleanups = make_cleanup (link_hash_table_free, &cleanup_data); | |
336 | link_info.callbacks = &link_callbacks; | |
337 | ||
338 | memset (&link_order, 0, sizeof (link_order)); | |
339 | link_order.next = NULL; | |
340 | link_order.type = bfd_indirect_link_order; | |
341 | link_order.offset = 0; | |
342 | link_order.size = bfd_get_section_size (sect); | |
343 | link_order.u.indirect.section = sect; | |
344 | ||
224c3ddb | 345 | sect_data = (bfd_byte *) xmalloc (bfd_get_section_size (sect)); |
bb2ec1b3 TT |
346 | make_cleanup (xfree, sect_data); |
347 | ||
348 | sect_data_got = bfd_get_relocated_section_contents (abfd, &link_info, | |
349 | &link_order, sect_data, | |
350 | FALSE, symbol_table); | |
351 | ||
352 | if (sect_data_got == NULL) | |
353 | error (_("Cannot map compiled module \"%s\" section \"%s\": %s"), | |
354 | bfd_get_filename (abfd), bfd_get_section_name (abfd, sect), | |
355 | bfd_errmsg (bfd_get_error ())); | |
356 | gdb_assert (sect_data_got == sect_data); | |
357 | ||
358 | inferior_addr = bfd_get_section_vma (abfd, sect); | |
359 | if (0 != target_write_memory (inferior_addr, sect_data, | |
360 | bfd_get_section_size (sect))) | |
361 | error (_("Cannot write compiled module \"%s\" section \"%s\" " | |
362 | "to inferior memory range %s-%s."), | |
363 | bfd_get_filename (abfd), bfd_get_section_name (abfd, sect), | |
364 | paddress (target_gdbarch (), inferior_addr), | |
365 | paddress (target_gdbarch (), | |
366 | inferior_addr + bfd_get_section_size (sect))); | |
367 | ||
368 | do_cleanups (cleanups); | |
369 | } | |
370 | ||
36de76f9 JK |
371 | /* Fetch the type of COMPILE_I_EXPR_PTR_TYPE and COMPILE_I_EXPR_VAL |
372 | symbols in OBJFILE so we can calculate how much memory to allocate | |
373 | for the out parameter. This avoids needing a malloc in the generated | |
374 | code. Throw an error if anything fails. | |
375 | GDB first tries to compile the code with COMPILE_I_PRINT_ADDRESS_SCOPE. | |
376 | If it finds user tries to print an array type this function returns | |
377 | NULL. Caller will then regenerate the code with | |
378 | COMPILE_I_PRINT_VALUE_SCOPE, recompiles it again and finally runs it. | |
379 | This is because __auto_type array-to-pointer type conversion of | |
380 | COMPILE_I_EXPR_VAL which gets detected by COMPILE_I_EXPR_PTR_TYPE | |
381 | preserving the array type. */ | |
382 | ||
383 | static struct type * | |
384 | get_out_value_type (struct symbol *func_sym, struct objfile *objfile, | |
385 | enum compile_i_scope_types scope) | |
386 | { | |
d976bace JK |
387 | struct symbol *gdb_ptr_type_sym; |
388 | /* Initialize it just to avoid a GCC false warning. */ | |
389 | struct symbol *gdb_val_sym = NULL; | |
4d18dfad | 390 | struct type *gdb_ptr_type, *gdb_type_from_ptr, *gdb_type, *retval; |
d976bace JK |
391 | /* Initialize it just to avoid a GCC false warning. */ |
392 | const struct block *block = NULL; | |
36de76f9 JK |
393 | const struct blockvector *bv; |
394 | int nblocks = 0; | |
395 | int block_loop = 0; | |
396 | ||
397 | bv = SYMTAB_BLOCKVECTOR (func_sym->owner.symtab); | |
398 | nblocks = BLOCKVECTOR_NBLOCKS (bv); | |
399 | ||
400 | gdb_ptr_type_sym = NULL; | |
401 | for (block_loop = 0; block_loop < nblocks; block_loop++) | |
402 | { | |
d976bace | 403 | struct symbol *function = NULL; |
36de76f9 JK |
404 | const struct block *function_block; |
405 | ||
406 | block = BLOCKVECTOR_BLOCK (bv, block_loop); | |
407 | if (BLOCK_FUNCTION (block) != NULL) | |
408 | continue; | |
de63c46b PA |
409 | gdb_val_sym = block_lookup_symbol (block, |
410 | COMPILE_I_EXPR_VAL, | |
411 | symbol_name_match_type::SEARCH_NAME, | |
412 | VAR_DOMAIN); | |
36de76f9 JK |
413 | if (gdb_val_sym == NULL) |
414 | continue; | |
415 | ||
416 | function_block = block; | |
417 | while (function_block != BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK) | |
418 | && function_block != BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK)) | |
419 | { | |
420 | function_block = BLOCK_SUPERBLOCK (function_block); | |
421 | function = BLOCK_FUNCTION (function_block); | |
422 | if (function != NULL) | |
423 | break; | |
424 | } | |
425 | if (function != NULL | |
426 | && (BLOCK_SUPERBLOCK (function_block) | |
427 | == BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK)) | |
078a0207 KS |
428 | && (strcmp_iw (SYMBOL_LINKAGE_NAME (function), |
429 | GCC_FE_WRAPPER_FUNCTION) | |
36de76f9 JK |
430 | == 0)) |
431 | break; | |
432 | } | |
433 | if (block_loop == nblocks) | |
434 | error (_("No \"%s\" symbol found"), COMPILE_I_EXPR_PTR_TYPE); | |
435 | ||
436 | gdb_type = SYMBOL_TYPE (gdb_val_sym); | |
f168693b | 437 | gdb_type = check_typedef (gdb_type); |
36de76f9 JK |
438 | |
439 | gdb_ptr_type_sym = block_lookup_symbol (block, COMPILE_I_EXPR_PTR_TYPE, | |
de63c46b | 440 | symbol_name_match_type::SEARCH_NAME, |
36de76f9 JK |
441 | VAR_DOMAIN); |
442 | if (gdb_ptr_type_sym == NULL) | |
443 | error (_("No \"%s\" symbol found"), COMPILE_I_EXPR_PTR_TYPE); | |
444 | gdb_ptr_type = SYMBOL_TYPE (gdb_ptr_type_sym); | |
f168693b | 445 | gdb_ptr_type = check_typedef (gdb_ptr_type); |
36de76f9 JK |
446 | if (TYPE_CODE (gdb_ptr_type) != TYPE_CODE_PTR) |
447 | error (_("Type of \"%s\" is not a pointer"), COMPILE_I_EXPR_PTR_TYPE); | |
078a0207 | 448 | gdb_type_from_ptr = check_typedef (TYPE_TARGET_TYPE (gdb_ptr_type)); |
36de76f9 JK |
449 | |
450 | if (types_deeply_equal (gdb_type, gdb_type_from_ptr)) | |
451 | { | |
452 | if (scope != COMPILE_I_PRINT_ADDRESS_SCOPE) | |
453 | error (_("Expected address scope in compiled module \"%s\"."), | |
454 | objfile_name (objfile)); | |
455 | return gdb_type; | |
456 | } | |
457 | ||
458 | if (TYPE_CODE (gdb_type) != TYPE_CODE_PTR) | |
459 | error (_("Invalid type code %d of symbol \"%s\" " | |
460 | "in compiled module \"%s\"."), | |
461 | TYPE_CODE (gdb_type_from_ptr), COMPILE_I_EXPR_VAL, | |
462 | objfile_name (objfile)); | |
463 | ||
4d18dfad | 464 | retval = gdb_type_from_ptr; |
36de76f9 JK |
465 | switch (TYPE_CODE (gdb_type_from_ptr)) |
466 | { | |
467 | case TYPE_CODE_ARRAY: | |
468 | gdb_type_from_ptr = TYPE_TARGET_TYPE (gdb_type_from_ptr); | |
469 | break; | |
470 | case TYPE_CODE_FUNC: | |
471 | break; | |
472 | default: | |
473 | error (_("Invalid type code %d of symbol \"%s\" " | |
474 | "in compiled module \"%s\"."), | |
475 | TYPE_CODE (gdb_type_from_ptr), COMPILE_I_EXPR_PTR_TYPE, | |
476 | objfile_name (objfile)); | |
477 | } | |
478 | if (!types_deeply_equal (gdb_type_from_ptr, | |
479 | TYPE_TARGET_TYPE (gdb_type))) | |
480 | error (_("Referenced types do not match for symbols \"%s\" and \"%s\" " | |
481 | "in compiled module \"%s\"."), | |
482 | COMPILE_I_EXPR_PTR_TYPE, COMPILE_I_EXPR_VAL, | |
483 | objfile_name (objfile)); | |
484 | if (scope == COMPILE_I_PRINT_ADDRESS_SCOPE) | |
485 | return NULL; | |
4d18dfad | 486 | return retval; |
36de76f9 JK |
487 | } |
488 | ||
83d3415e JK |
489 | /* Fetch the type of first parameter of FUNC_SYM. |
490 | Return NULL if FUNC_SYM has no parameters. Throw an error otherwise. */ | |
bb2ec1b3 TT |
491 | |
492 | static struct type * | |
83d3415e | 493 | get_regs_type (struct symbol *func_sym, struct objfile *objfile) |
bb2ec1b3 | 494 | { |
83d3415e JK |
495 | struct type *func_type = SYMBOL_TYPE (func_sym); |
496 | struct type *regsp_type, *regs_type; | |
bb2ec1b3 TT |
497 | |
498 | /* No register parameter present. */ | |
499 | if (TYPE_NFIELDS (func_type) == 0) | |
500 | return NULL; | |
501 | ||
bb2ec1b3 TT |
502 | regsp_type = check_typedef (TYPE_FIELD_TYPE (func_type, 0)); |
503 | if (TYPE_CODE (regsp_type) != TYPE_CODE_PTR) | |
504 | error (_("Invalid type code %d of first parameter of function \"%s\" " | |
505 | "in compiled module \"%s\"."), | |
506 | TYPE_CODE (regsp_type), GCC_FE_WRAPPER_FUNCTION, | |
507 | objfile_name (objfile)); | |
508 | ||
509 | regs_type = check_typedef (TYPE_TARGET_TYPE (regsp_type)); | |
510 | if (TYPE_CODE (regs_type) != TYPE_CODE_STRUCT) | |
511 | error (_("Invalid type code %d of dereferenced first parameter " | |
512 | "of function \"%s\" in compiled module \"%s\"."), | |
513 | TYPE_CODE (regs_type), GCC_FE_WRAPPER_FUNCTION, | |
514 | objfile_name (objfile)); | |
515 | ||
516 | return regs_type; | |
517 | } | |
518 | ||
519 | /* Store all inferior registers required by REGS_TYPE to inferior memory | |
520 | starting at inferior address REGS_BASE. */ | |
521 | ||
522 | static void | |
523 | store_regs (struct type *regs_type, CORE_ADDR regs_base) | |
524 | { | |
525 | struct gdbarch *gdbarch = target_gdbarch (); | |
bb2ec1b3 TT |
526 | int fieldno; |
527 | ||
528 | for (fieldno = 0; fieldno < TYPE_NFIELDS (regs_type); fieldno++) | |
529 | { | |
530 | const char *reg_name = TYPE_FIELD_NAME (regs_type, fieldno); | |
531 | ULONGEST reg_bitpos = TYPE_FIELD_BITPOS (regs_type, fieldno); | |
532 | ULONGEST reg_bitsize = TYPE_FIELD_BITSIZE (regs_type, fieldno); | |
533 | ULONGEST reg_offset; | |
534 | struct type *reg_type = check_typedef (TYPE_FIELD_TYPE (regs_type, | |
535 | fieldno)); | |
536 | ULONGEST reg_size = TYPE_LENGTH (reg_type); | |
537 | int regnum; | |
538 | struct value *regval; | |
539 | CORE_ADDR inferior_addr; | |
540 | ||
541 | if (strcmp (reg_name, COMPILE_I_SIMPLE_REGISTER_DUMMY) == 0) | |
542 | continue; | |
543 | ||
544 | if ((reg_bitpos % 8) != 0 || reg_bitsize != 0) | |
545 | error (_("Invalid register \"%s\" position %s bits or size %s bits"), | |
546 | reg_name, pulongest (reg_bitpos), pulongest (reg_bitsize)); | |
547 | reg_offset = reg_bitpos / 8; | |
548 | ||
549 | if (TYPE_CODE (reg_type) != TYPE_CODE_INT | |
550 | && TYPE_CODE (reg_type) != TYPE_CODE_PTR) | |
551 | error (_("Invalid register \"%s\" type code %d"), reg_name, | |
552 | TYPE_CODE (reg_type)); | |
553 | ||
554 | regnum = compile_register_name_demangle (gdbarch, reg_name); | |
555 | ||
556 | regval = value_from_register (reg_type, regnum, get_current_frame ()); | |
557 | if (value_optimized_out (regval)) | |
558 | error (_("Register \"%s\" is optimized out."), reg_name); | |
559 | if (!value_entirely_available (regval)) | |
560 | error (_("Register \"%s\" is not available."), reg_name); | |
561 | ||
562 | inferior_addr = regs_base + reg_offset; | |
563 | if (0 != target_write_memory (inferior_addr, value_contents (regval), | |
564 | reg_size)) | |
565 | error (_("Cannot write register \"%s\" to inferior memory at %s."), | |
566 | reg_name, paddress (gdbarch, inferior_addr)); | |
567 | } | |
568 | } | |
569 | ||
aaee65ae PA |
570 | /* Load the object file specified in FILE_NAMES into inferior memory. |
571 | Throw an error otherwise. Caller must fully dispose the return | |
572 | value by calling compile_object_run. Returns NULL only for | |
573 | COMPILE_I_PRINT_ADDRESS_SCOPE when COMPILE_I_PRINT_VALUE_SCOPE | |
574 | should have been used instead. */ | |
bb2ec1b3 TT |
575 | |
576 | struct compile_module * | |
aaee65ae | 577 | compile_object_load (const compile_file_names &file_names, |
5c65b58a | 578 | enum compile_i_scope_types scope, void *scope_data) |
bb2ec1b3 | 579 | { |
bb2ec1b3 | 580 | struct setup_sections_data setup_sections_data; |
798a7429 | 581 | CORE_ADDR regs_addr, out_value_addr = 0; |
83d3415e JK |
582 | struct symbol *func_sym; |
583 | struct type *func_type; | |
bb2ec1b3 TT |
584 | struct bound_minimal_symbol bmsym; |
585 | long storage_needed; | |
586 | asymbol **symbol_table, **symp; | |
587 | long number_of_symbols, missing_symbols; | |
bb2ec1b3 | 588 | struct compile_module *retval; |
36de76f9 | 589 | struct type *regs_type, *out_value_type = NULL; |
ee0c3293 | 590 | char **matching; |
bb2ec1b3 | 591 | struct objfile *objfile; |
83d3415e JK |
592 | int expect_parameters; |
593 | struct type *expect_return_type; | |
bb2ec1b3 | 594 | |
ee0c3293 TT |
595 | gdb::unique_xmalloc_ptr<char> filename |
596 | (tilde_expand (file_names.object_file ())); | |
bb2ec1b3 | 597 | |
ee0c3293 | 598 | gdb_bfd_ref_ptr abfd (gdb_bfd_open (filename.get (), gnutarget, -1)); |
bb2ec1b3 TT |
599 | if (abfd == NULL) |
600 | error (_("\"%s\": could not open as compiled module: %s"), | |
ee0c3293 | 601 | filename.get (), bfd_errmsg (bfd_get_error ())); |
bb2ec1b3 | 602 | |
192b62ce | 603 | if (!bfd_check_format_matches (abfd.get (), bfd_object, &matching)) |
bb2ec1b3 | 604 | error (_("\"%s\": not in loadable format: %s"), |
803c08d0 TT |
605 | filename.get (), |
606 | gdb_bfd_errmsg (bfd_get_error (), matching).c_str ()); | |
bb2ec1b3 | 607 | |
192b62ce | 608 | if ((bfd_get_file_flags (abfd.get ()) & (EXEC_P | DYNAMIC)) != 0) |
ee0c3293 | 609 | error (_("\"%s\": not in object format."), filename.get ()); |
bb2ec1b3 TT |
610 | |
611 | setup_sections_data.last_size = 0; | |
612 | setup_sections_data.last_section_first = abfd->sections; | |
613 | setup_sections_data.last_prot = -1; | |
614 | setup_sections_data.last_max_alignment = 1; | |
c9e0a7e3 TT |
615 | setup_sections_data.munmap_list.reset (new struct munmap_list); |
616 | ||
192b62ce TT |
617 | bfd_map_over_sections (abfd.get (), setup_sections, &setup_sections_data); |
618 | setup_sections (abfd.get (), NULL, &setup_sections_data); | |
bb2ec1b3 | 619 | |
192b62ce | 620 | storage_needed = bfd_get_symtab_upper_bound (abfd.get ()); |
bb2ec1b3 TT |
621 | if (storage_needed < 0) |
622 | error (_("Cannot read symbols of compiled module \"%s\": %s"), | |
c9e0a7e3 | 623 | filename.get (), bfd_errmsg (bfd_get_error ())); |
bb2ec1b3 TT |
624 | |
625 | /* SYMFILE_VERBOSE is not passed even if FROM_TTY, user is not interested in | |
626 | "Reading symbols from ..." message for automatically generated file. */ | |
ed2b3126 TT |
627 | std::unique_ptr<struct objfile> objfile_holder |
628 | (symbol_file_add_from_bfd (abfd.get (), filename.get (), | |
629 | 0, NULL, 0, NULL)); | |
630 | objfile = objfile_holder.get (); | |
bb2ec1b3 | 631 | |
83d3415e JK |
632 | func_sym = lookup_global_symbol_from_objfile (objfile, |
633 | GCC_FE_WRAPPER_FUNCTION, | |
d12307c1 | 634 | VAR_DOMAIN).symbol; |
83d3415e JK |
635 | if (func_sym == NULL) |
636 | error (_("Cannot find function \"%s\" in compiled module \"%s\"."), | |
637 | GCC_FE_WRAPPER_FUNCTION, objfile_name (objfile)); | |
638 | func_type = SYMBOL_TYPE (func_sym); | |
639 | if (TYPE_CODE (func_type) != TYPE_CODE_FUNC) | |
640 | error (_("Invalid type code %d of function \"%s\" in compiled " | |
641 | "module \"%s\"."), | |
642 | TYPE_CODE (func_type), GCC_FE_WRAPPER_FUNCTION, | |
643 | objfile_name (objfile)); | |
644 | ||
645 | switch (scope) | |
646 | { | |
647 | case COMPILE_I_SIMPLE_SCOPE: | |
648 | expect_parameters = 1; | |
649 | expect_return_type = builtin_type (target_gdbarch ())->builtin_void; | |
650 | break; | |
651 | case COMPILE_I_RAW_SCOPE: | |
652 | expect_parameters = 0; | |
653 | expect_return_type = builtin_type (target_gdbarch ())->builtin_void; | |
654 | break; | |
36de76f9 JK |
655 | case COMPILE_I_PRINT_ADDRESS_SCOPE: |
656 | case COMPILE_I_PRINT_VALUE_SCOPE: | |
657 | expect_parameters = 2; | |
658 | expect_return_type = builtin_type (target_gdbarch ())->builtin_void; | |
659 | break; | |
83d3415e JK |
660 | default: |
661 | internal_error (__FILE__, __LINE__, _("invalid scope %d"), scope); | |
662 | } | |
663 | if (TYPE_NFIELDS (func_type) != expect_parameters) | |
664 | error (_("Invalid %d parameters of function \"%s\" in compiled " | |
665 | "module \"%s\"."), | |
666 | TYPE_NFIELDS (func_type), GCC_FE_WRAPPER_FUNCTION, | |
667 | objfile_name (objfile)); | |
668 | if (!types_deeply_equal (expect_return_type, TYPE_TARGET_TYPE (func_type))) | |
669 | error (_("Invalid return type of function \"%s\" in compiled " | |
c9e0a7e3 TT |
670 | "module \"%s\"."), |
671 | GCC_FE_WRAPPER_FUNCTION, objfile_name (objfile)); | |
bb2ec1b3 TT |
672 | |
673 | /* The memory may be later needed | |
674 | by bfd_generic_get_relocated_section_contents | |
675 | called from default_symfile_relocate. */ | |
224c3ddb SM |
676 | symbol_table = (asymbol **) obstack_alloc (&objfile->objfile_obstack, |
677 | storage_needed); | |
192b62ce | 678 | number_of_symbols = bfd_canonicalize_symtab (abfd.get (), symbol_table); |
bb2ec1b3 TT |
679 | if (number_of_symbols < 0) |
680 | error (_("Cannot parse symbols of compiled module \"%s\": %s"), | |
c9e0a7e3 | 681 | filename.get (), bfd_errmsg (bfd_get_error ())); |
bb2ec1b3 TT |
682 | |
683 | missing_symbols = 0; | |
684 | for (symp = symbol_table; symp < symbol_table + number_of_symbols; symp++) | |
685 | { | |
686 | asymbol *sym = *symp; | |
687 | ||
688 | if (sym->flags != 0) | |
689 | continue; | |
bb2ec1b3 TT |
690 | sym->flags = BSF_GLOBAL; |
691 | sym->section = bfd_abs_section_ptr; | |
692 | if (strcmp (sym->name, "_GLOBAL_OFFSET_TABLE_") == 0) | |
693 | { | |
b0fd6b30 JK |
694 | if (compile_debug) |
695 | fprintf_unfiltered (gdb_stdlog, | |
696 | "ELF symbol \"%s\" relocated to zero\n", | |
697 | sym->name); | |
698 | ||
699 | /* It seems to be a GCC bug, with -mcmodel=large there should be no | |
700 | need for _GLOBAL_OFFSET_TABLE_. Together with -fPIE the data | |
701 | remain PC-relative even with _GLOBAL_OFFSET_TABLE_ as zero. */ | |
bb2ec1b3 TT |
702 | sym->value = 0; |
703 | continue; | |
704 | } | |
705 | bmsym = lookup_minimal_symbol (sym->name, NULL, NULL); | |
706 | switch (bmsym.minsym == NULL | |
707 | ? mst_unknown : MSYMBOL_TYPE (bmsym.minsym)) | |
708 | { | |
709 | case mst_text: | |
078a0207 KS |
710 | case mst_bss: |
711 | case mst_data: | |
bb2ec1b3 | 712 | sym->value = BMSYMBOL_VALUE_ADDRESS (bmsym); |
b0fd6b30 JK |
713 | if (compile_debug) |
714 | fprintf_unfiltered (gdb_stdlog, | |
715 | "ELF mst_text symbol \"%s\" relocated to %s\n", | |
716 | sym->name, | |
717 | paddress (target_gdbarch (), sym->value)); | |
bb2ec1b3 | 718 | break; |
e26efa40 JK |
719 | case mst_text_gnu_ifunc: |
720 | sym->value = gnu_ifunc_resolve_addr (target_gdbarch (), | |
721 | BMSYMBOL_VALUE_ADDRESS (bmsym)); | |
b0fd6b30 JK |
722 | if (compile_debug) |
723 | fprintf_unfiltered (gdb_stdlog, | |
724 | "ELF mst_text_gnu_ifunc symbol \"%s\" " | |
725 | "relocated to %s\n", | |
726 | sym->name, | |
727 | paddress (target_gdbarch (), sym->value)); | |
e26efa40 | 728 | break; |
bb2ec1b3 TT |
729 | default: |
730 | warning (_("Could not find symbol \"%s\" " | |
731 | "for compiled module \"%s\"."), | |
ee0c3293 | 732 | sym->name, filename.get ()); |
bb2ec1b3 TT |
733 | missing_symbols++; |
734 | } | |
735 | } | |
736 | if (missing_symbols) | |
737 | error (_("%ld symbols were missing, cannot continue."), missing_symbols); | |
738 | ||
192b62ce | 739 | bfd_map_over_sections (abfd.get (), copy_sections, symbol_table); |
bb2ec1b3 | 740 | |
83d3415e | 741 | regs_type = get_regs_type (func_sym, objfile); |
bb2ec1b3 TT |
742 | if (regs_type == NULL) |
743 | regs_addr = 0; | |
744 | else | |
745 | { | |
746 | /* Use read-only non-executable memory protection. */ | |
747 | regs_addr = gdbarch_infcall_mmap (target_gdbarch (), | |
748 | TYPE_LENGTH (regs_type), | |
749 | GDB_MMAP_PROT_READ); | |
750 | gdb_assert (regs_addr != 0); | |
c9e0a7e3 | 751 | setup_sections_data.munmap_list->add (regs_addr, TYPE_LENGTH (regs_type)); |
b6de3f96 | 752 | if (compile_debug) |
a4063588 | 753 | fprintf_unfiltered (gdb_stdlog, |
b6de3f96 JK |
754 | "allocated %s bytes at %s for registers\n", |
755 | paddress (target_gdbarch (), | |
756 | TYPE_LENGTH (regs_type)), | |
757 | paddress (target_gdbarch (), regs_addr)); | |
bb2ec1b3 TT |
758 | store_regs (regs_type, regs_addr); |
759 | } | |
760 | ||
36de76f9 JK |
761 | if (scope == COMPILE_I_PRINT_ADDRESS_SCOPE |
762 | || scope == COMPILE_I_PRINT_VALUE_SCOPE) | |
763 | { | |
764 | out_value_type = get_out_value_type (func_sym, objfile, scope); | |
765 | if (out_value_type == NULL) | |
c9e0a7e3 | 766 | return NULL; |
36de76f9 JK |
767 | check_typedef (out_value_type); |
768 | out_value_addr = gdbarch_infcall_mmap (target_gdbarch (), | |
769 | TYPE_LENGTH (out_value_type), | |
770 | (GDB_MMAP_PROT_READ | |
771 | | GDB_MMAP_PROT_WRITE)); | |
772 | gdb_assert (out_value_addr != 0); | |
c9e0a7e3 TT |
773 | setup_sections_data.munmap_list->add (out_value_addr, |
774 | TYPE_LENGTH (out_value_type)); | |
36de76f9 | 775 | if (compile_debug) |
a4063588 | 776 | fprintf_unfiltered (gdb_stdlog, |
36de76f9 JK |
777 | "allocated %s bytes at %s for printed value\n", |
778 | paddress (target_gdbarch (), | |
779 | TYPE_LENGTH (out_value_type)), | |
780 | paddress (target_gdbarch (), out_value_addr)); | |
781 | } | |
782 | ||
8d749320 | 783 | retval = XNEW (struct compile_module); |
ed2b3126 | 784 | retval->objfile = objfile_holder.release (); |
aaee65ae | 785 | retval->source_file = xstrdup (file_names.source_file ()); |
83d3415e | 786 | retval->func_sym = func_sym; |
bb2ec1b3 | 787 | retval->regs_addr = regs_addr; |
5c65b58a JK |
788 | retval->scope = scope; |
789 | retval->scope_data = scope_data; | |
36de76f9 JK |
790 | retval->out_value_type = out_value_type; |
791 | retval->out_value_addr = out_value_addr; | |
c9e0a7e3 | 792 | retval->munmap_list_head = setup_sections_data.munmap_list.release (); |
7f361056 | 793 | |
bb2ec1b3 TT |
794 | return retval; |
795 | } |