Commit | Line | Data |
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bb2ec1b3 TT |
1 | /* Load module for 'compile' command. |
2 | ||
42a4f53d | 3 | Copyright (C) 2014-2019 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 | 51 | for (auto &item : items) |
40f03055 TT |
52 | { |
53 | TRY | |
54 | { | |
55 | gdbarch_infcall_munmap (target_gdbarch (), item.addr, item.size); | |
56 | } | |
57 | CATCH (ex, RETURN_MASK_ERROR) | |
58 | { | |
59 | /* There's not much the user can do, so just ignore | |
60 | this. */ | |
61 | } | |
62 | END_CATCH | |
63 | } | |
7f361056 JK |
64 | } |
65 | ||
bb2ec1b3 TT |
66 | /* Helper data for setup_sections. */ |
67 | ||
68 | struct setup_sections_data | |
69 | { | |
70 | /* Size of all recent sections with matching LAST_PROT. */ | |
71 | CORE_ADDR last_size; | |
72 | ||
73 | /* First section matching LAST_PROT. */ | |
74 | asection *last_section_first; | |
75 | ||
76 | /* Memory protection like the prot parameter of gdbarch_infcall_mmap. */ | |
77 | unsigned last_prot; | |
78 | ||
79 | /* Maximum of alignments of all sections matching LAST_PROT. | |
80 | This value is always at least 1. This value is always a power of 2. */ | |
81 | CORE_ADDR last_max_alignment; | |
7f361056 JK |
82 | |
83 | /* List of inferior mmap ranges where setup_sections should add its | |
84 | next range. */ | |
c9e0a7e3 | 85 | std::unique_ptr<struct munmap_list> munmap_list; |
bb2ec1b3 TT |
86 | }; |
87 | ||
88 | /* Place all ABFD sections next to each other obeying all constraints. */ | |
89 | ||
90 | static void | |
91 | setup_sections (bfd *abfd, asection *sect, void *data_voidp) | |
92 | { | |
9a3c8263 | 93 | struct setup_sections_data *data = (struct setup_sections_data *) data_voidp; |
bb2ec1b3 TT |
94 | CORE_ADDR alignment; |
95 | unsigned prot; | |
96 | ||
97 | if (sect != NULL) | |
98 | { | |
99 | /* It is required by later bfd_get_relocated_section_contents. */ | |
100 | if (sect->output_section == NULL) | |
101 | sect->output_section = sect; | |
102 | ||
103 | if ((bfd_get_section_flags (abfd, sect) & SEC_ALLOC) == 0) | |
104 | return; | |
105 | ||
bb2b33b9 | 106 | /* Make the memory always readable. */ |
bb2ec1b3 TT |
107 | prot = GDB_MMAP_PROT_READ; |
108 | if ((bfd_get_section_flags (abfd, sect) & SEC_READONLY) == 0) | |
109 | prot |= GDB_MMAP_PROT_WRITE; | |
110 | if ((bfd_get_section_flags (abfd, sect) & SEC_CODE) != 0) | |
111 | prot |= GDB_MMAP_PROT_EXEC; | |
112 | ||
113 | if (compile_debug) | |
a4063588 | 114 | fprintf_unfiltered (gdb_stdlog, |
bb2ec1b3 TT |
115 | "module \"%s\" section \"%s\" size %s prot %u\n", |
116 | bfd_get_filename (abfd), | |
117 | bfd_get_section_name (abfd, sect), | |
118 | paddress (target_gdbarch (), | |
119 | bfd_get_section_size (sect)), | |
120 | prot); | |
121 | } | |
122 | else | |
123 | prot = -1; | |
124 | ||
125 | if (sect == NULL | |
126 | || (data->last_prot != prot && bfd_get_section_size (sect) != 0)) | |
127 | { | |
128 | CORE_ADDR addr; | |
129 | asection *sect_iter; | |
130 | ||
131 | if (data->last_size != 0) | |
132 | { | |
133 | addr = gdbarch_infcall_mmap (target_gdbarch (), data->last_size, | |
134 | data->last_prot); | |
c9e0a7e3 | 135 | data->munmap_list->add (addr, data->last_size); |
bb2ec1b3 | 136 | if (compile_debug) |
a4063588 | 137 | fprintf_unfiltered (gdb_stdlog, |
bb2ec1b3 TT |
138 | "allocated %s bytes at %s prot %u\n", |
139 | paddress (target_gdbarch (), data->last_size), | |
140 | paddress (target_gdbarch (), addr), | |
141 | data->last_prot); | |
142 | } | |
143 | else | |
144 | addr = 0; | |
145 | ||
146 | if ((addr & (data->last_max_alignment - 1)) != 0) | |
147 | error (_("Inferior compiled module address %s " | |
148 | "is not aligned to BFD required %s."), | |
149 | paddress (target_gdbarch (), addr), | |
150 | paddress (target_gdbarch (), data->last_max_alignment)); | |
151 | ||
152 | for (sect_iter = data->last_section_first; sect_iter != sect; | |
153 | sect_iter = sect_iter->next) | |
154 | if ((bfd_get_section_flags (abfd, sect_iter) & SEC_ALLOC) != 0) | |
155 | bfd_set_section_vma (abfd, sect_iter, | |
156 | addr + bfd_get_section_vma (abfd, sect_iter)); | |
157 | ||
158 | data->last_size = 0; | |
159 | data->last_section_first = sect; | |
160 | data->last_prot = prot; | |
161 | data->last_max_alignment = 1; | |
162 | } | |
163 | ||
164 | if (sect == NULL) | |
165 | return; | |
166 | ||
167 | alignment = ((CORE_ADDR) 1) << bfd_get_section_alignment (abfd, sect); | |
325fac50 | 168 | data->last_max_alignment = std::max (data->last_max_alignment, alignment); |
bb2ec1b3 TT |
169 | |
170 | data->last_size = (data->last_size + alignment - 1) & -alignment; | |
171 | ||
172 | bfd_set_section_vma (abfd, sect, data->last_size); | |
173 | ||
174 | data->last_size += bfd_get_section_size (sect); | |
175 | data->last_size = (data->last_size + alignment - 1) & -alignment; | |
176 | } | |
177 | ||
178 | /* Helper for link_callbacks callbacks vector. */ | |
179 | ||
1a72702b | 180 | static void |
bb2ec1b3 TT |
181 | link_callbacks_multiple_definition (struct bfd_link_info *link_info, |
182 | struct bfd_link_hash_entry *h, bfd *nbfd, | |
183 | asection *nsec, bfd_vma nval) | |
184 | { | |
185 | bfd *abfd = link_info->input_bfds; | |
186 | ||
187 | if (link_info->allow_multiple_definition) | |
1a72702b | 188 | return; |
8e8347b8 | 189 | warning (_("Compiled module \"%s\": multiple symbol definitions: %s"), |
bb2ec1b3 | 190 | bfd_get_filename (abfd), h->root.string); |
bb2ec1b3 TT |
191 | } |
192 | ||
193 | /* Helper for link_callbacks callbacks vector. */ | |
194 | ||
1a72702b | 195 | static void |
bb2ec1b3 TT |
196 | link_callbacks_warning (struct bfd_link_info *link_info, const char *xwarning, |
197 | const char *symbol, bfd *abfd, asection *section, | |
198 | bfd_vma address) | |
199 | { | |
8e8347b8 | 200 | warning (_("Compiled module \"%s\" section \"%s\": warning: %s"), |
bb2ec1b3 TT |
201 | bfd_get_filename (abfd), bfd_get_section_name (abfd, section), |
202 | xwarning); | |
bb2ec1b3 TT |
203 | } |
204 | ||
205 | /* Helper for link_callbacks callbacks vector. */ | |
206 | ||
1a72702b | 207 | static void |
bb2ec1b3 TT |
208 | link_callbacks_undefined_symbol (struct bfd_link_info *link_info, |
209 | const char *name, bfd *abfd, asection *section, | |
210 | bfd_vma address, bfd_boolean is_fatal) | |
211 | { | |
212 | warning (_("Cannot resolve relocation to \"%s\" " | |
213 | "from compiled module \"%s\" section \"%s\"."), | |
214 | name, bfd_get_filename (abfd), bfd_get_section_name (abfd, section)); | |
bb2ec1b3 TT |
215 | } |
216 | ||
217 | /* Helper for link_callbacks callbacks vector. */ | |
218 | ||
1a72702b | 219 | static void |
bb2ec1b3 TT |
220 | link_callbacks_reloc_overflow (struct bfd_link_info *link_info, |
221 | struct bfd_link_hash_entry *entry, | |
222 | const char *name, const char *reloc_name, | |
223 | bfd_vma addend, bfd *abfd, asection *section, | |
224 | bfd_vma address) | |
225 | { | |
bb2ec1b3 TT |
226 | } |
227 | ||
228 | /* Helper for link_callbacks callbacks vector. */ | |
229 | ||
1a72702b | 230 | static void |
bb2ec1b3 TT |
231 | link_callbacks_reloc_dangerous (struct bfd_link_info *link_info, |
232 | const char *message, bfd *abfd, | |
233 | asection *section, bfd_vma address) | |
234 | { | |
235 | warning (_("Compiled module \"%s\" section \"%s\": dangerous " | |
236 | "relocation: %s\n"), | |
237 | bfd_get_filename (abfd), bfd_get_section_name (abfd, section), | |
238 | message); | |
bb2ec1b3 TT |
239 | } |
240 | ||
241 | /* Helper for link_callbacks callbacks vector. */ | |
242 | ||
1a72702b | 243 | static void |
bb2ec1b3 TT |
244 | link_callbacks_unattached_reloc (struct bfd_link_info *link_info, |
245 | const char *name, bfd *abfd, asection *section, | |
246 | bfd_vma address) | |
247 | { | |
248 | warning (_("Compiled module \"%s\" section \"%s\": unattached " | |
249 | "relocation: %s\n"), | |
250 | bfd_get_filename (abfd), bfd_get_section_name (abfd, section), | |
251 | name); | |
bb2ec1b3 TT |
252 | } |
253 | ||
254 | /* Helper for link_callbacks callbacks vector. */ | |
255 | ||
77b64a49 PA |
256 | static void link_callbacks_einfo (const char *fmt, ...) |
257 | ATTRIBUTE_PRINTF (1, 2); | |
258 | ||
bb2ec1b3 TT |
259 | static void |
260 | link_callbacks_einfo (const char *fmt, ...) | |
261 | { | |
bb2ec1b3 | 262 | va_list ap; |
bb2ec1b3 TT |
263 | |
264 | va_start (ap, fmt); | |
20dcd8ca | 265 | std::string str = string_vprintf (fmt, ap); |
bb2ec1b3 | 266 | va_end (ap); |
bb2ec1b3 | 267 | |
20dcd8ca | 268 | warning (_("Compile module: warning: %s"), str.c_str ()); |
bb2ec1b3 TT |
269 | } |
270 | ||
271 | /* Helper for bfd_get_relocated_section_contents. | |
272 | Only these symbols are set by bfd_simple_get_relocated_section_contents | |
273 | but bfd/ seems to use even the NULL ones without checking them first. */ | |
274 | ||
275 | static const struct bfd_link_callbacks link_callbacks = | |
276 | { | |
277 | NULL, /* add_archive_element */ | |
278 | link_callbacks_multiple_definition, /* multiple_definition */ | |
279 | NULL, /* multiple_common */ | |
280 | NULL, /* add_to_set */ | |
281 | NULL, /* constructor */ | |
282 | link_callbacks_warning, /* warning */ | |
283 | link_callbacks_undefined_symbol, /* undefined_symbol */ | |
284 | link_callbacks_reloc_overflow, /* reloc_overflow */ | |
285 | link_callbacks_reloc_dangerous, /* reloc_dangerous */ | |
286 | link_callbacks_unattached_reloc, /* unattached_reloc */ | |
287 | NULL, /* notice */ | |
288 | link_callbacks_einfo, /* einfo */ | |
289 | NULL, /* info */ | |
290 | NULL, /* minfo */ | |
291 | NULL, /* override_segment_assignment */ | |
292 | }; | |
293 | ||
294 | struct link_hash_table_cleanup_data | |
295 | { | |
40f03055 TT |
296 | explicit link_hash_table_cleanup_data (bfd *abfd_) |
297 | : abfd (abfd_), | |
298 | link_next (abfd->link.next) | |
299 | { | |
300 | } | |
bb2ec1b3 | 301 | |
40f03055 TT |
302 | ~link_hash_table_cleanup_data () |
303 | { | |
304 | if (abfd->is_linker_output) | |
305 | (*abfd->link.hash->hash_table_free) (abfd); | |
306 | abfd->link.next = link_next; | |
307 | } | |
bb2ec1b3 | 308 | |
40f03055 | 309 | DISABLE_COPY_AND_ASSIGN (link_hash_table_cleanup_data); |
bb2ec1b3 | 310 | |
40f03055 TT |
311 | private: |
312 | ||
313 | bfd *abfd; | |
314 | bfd *link_next; | |
315 | }; | |
bb2ec1b3 TT |
316 | |
317 | /* Relocate and store into inferior memory each section SECT of ABFD. */ | |
318 | ||
319 | static void | |
320 | copy_sections (bfd *abfd, asection *sect, void *data) | |
321 | { | |
9a3c8263 | 322 | asymbol **symbol_table = (asymbol **) data; |
40f03055 | 323 | bfd_byte *sect_data_got; |
bb2ec1b3 TT |
324 | struct bfd_link_info link_info; |
325 | struct bfd_link_order link_order; | |
326 | CORE_ADDR inferior_addr; | |
bb2ec1b3 TT |
327 | |
328 | if ((bfd_get_section_flags (abfd, sect) & (SEC_ALLOC | SEC_LOAD)) | |
329 | != (SEC_ALLOC | SEC_LOAD)) | |
330 | return; | |
331 | ||
332 | if (bfd_get_section_size (sect) == 0) | |
333 | return; | |
334 | ||
335 | /* Mostly a copy of bfd_simple_get_relocated_section_contents which GDB | |
336 | cannot use as it does not report relocations to undefined symbols. */ | |
337 | memset (&link_info, 0, sizeof (link_info)); | |
338 | link_info.output_bfd = abfd; | |
339 | link_info.input_bfds = abfd; | |
340 | link_info.input_bfds_tail = &abfd->link.next; | |
341 | ||
40f03055 | 342 | struct link_hash_table_cleanup_data cleanup_data (abfd); |
bb2ec1b3 TT |
343 | |
344 | abfd->link.next = NULL; | |
345 | link_info.hash = bfd_link_hash_table_create (abfd); | |
346 | ||
bb2ec1b3 TT |
347 | link_info.callbacks = &link_callbacks; |
348 | ||
349 | memset (&link_order, 0, sizeof (link_order)); | |
350 | link_order.next = NULL; | |
351 | link_order.type = bfd_indirect_link_order; | |
352 | link_order.offset = 0; | |
353 | link_order.size = bfd_get_section_size (sect); | |
354 | link_order.u.indirect.section = sect; | |
355 | ||
40f03055 TT |
356 | gdb::unique_xmalloc_ptr<gdb_byte> sect_data |
357 | ((bfd_byte *) xmalloc (bfd_get_section_size (sect))); | |
bb2ec1b3 TT |
358 | |
359 | sect_data_got = bfd_get_relocated_section_contents (abfd, &link_info, | |
40f03055 TT |
360 | &link_order, |
361 | sect_data.get (), | |
bb2ec1b3 TT |
362 | FALSE, symbol_table); |
363 | ||
364 | if (sect_data_got == NULL) | |
365 | error (_("Cannot map compiled module \"%s\" section \"%s\": %s"), | |
366 | bfd_get_filename (abfd), bfd_get_section_name (abfd, sect), | |
367 | bfd_errmsg (bfd_get_error ())); | |
40f03055 | 368 | gdb_assert (sect_data_got == sect_data.get ()); |
bb2ec1b3 TT |
369 | |
370 | inferior_addr = bfd_get_section_vma (abfd, sect); | |
40f03055 | 371 | if (0 != target_write_memory (inferior_addr, sect_data.get (), |
bb2ec1b3 TT |
372 | bfd_get_section_size (sect))) |
373 | error (_("Cannot write compiled module \"%s\" section \"%s\" " | |
374 | "to inferior memory range %s-%s."), | |
375 | bfd_get_filename (abfd), bfd_get_section_name (abfd, sect), | |
376 | paddress (target_gdbarch (), inferior_addr), | |
377 | paddress (target_gdbarch (), | |
378 | inferior_addr + bfd_get_section_size (sect))); | |
bb2ec1b3 TT |
379 | } |
380 | ||
36de76f9 JK |
381 | /* Fetch the type of COMPILE_I_EXPR_PTR_TYPE and COMPILE_I_EXPR_VAL |
382 | symbols in OBJFILE so we can calculate how much memory to allocate | |
383 | for the out parameter. This avoids needing a malloc in the generated | |
384 | code. Throw an error if anything fails. | |
385 | GDB first tries to compile the code with COMPILE_I_PRINT_ADDRESS_SCOPE. | |
386 | If it finds user tries to print an array type this function returns | |
387 | NULL. Caller will then regenerate the code with | |
388 | COMPILE_I_PRINT_VALUE_SCOPE, recompiles it again and finally runs it. | |
389 | This is because __auto_type array-to-pointer type conversion of | |
390 | COMPILE_I_EXPR_VAL which gets detected by COMPILE_I_EXPR_PTR_TYPE | |
391 | preserving the array type. */ | |
392 | ||
393 | static struct type * | |
394 | get_out_value_type (struct symbol *func_sym, struct objfile *objfile, | |
395 | enum compile_i_scope_types scope) | |
396 | { | |
d976bace JK |
397 | struct symbol *gdb_ptr_type_sym; |
398 | /* Initialize it just to avoid a GCC false warning. */ | |
399 | struct symbol *gdb_val_sym = NULL; | |
4d18dfad | 400 | struct type *gdb_ptr_type, *gdb_type_from_ptr, *gdb_type, *retval; |
d976bace JK |
401 | /* Initialize it just to avoid a GCC false warning. */ |
402 | const struct block *block = NULL; | |
36de76f9 JK |
403 | const struct blockvector *bv; |
404 | int nblocks = 0; | |
405 | int block_loop = 0; | |
406 | ||
407 | bv = SYMTAB_BLOCKVECTOR (func_sym->owner.symtab); | |
408 | nblocks = BLOCKVECTOR_NBLOCKS (bv); | |
409 | ||
410 | gdb_ptr_type_sym = NULL; | |
411 | for (block_loop = 0; block_loop < nblocks; block_loop++) | |
412 | { | |
d976bace | 413 | struct symbol *function = NULL; |
36de76f9 JK |
414 | const struct block *function_block; |
415 | ||
416 | block = BLOCKVECTOR_BLOCK (bv, block_loop); | |
417 | if (BLOCK_FUNCTION (block) != NULL) | |
418 | continue; | |
de63c46b PA |
419 | gdb_val_sym = block_lookup_symbol (block, |
420 | COMPILE_I_EXPR_VAL, | |
421 | symbol_name_match_type::SEARCH_NAME, | |
422 | VAR_DOMAIN); | |
36de76f9 JK |
423 | if (gdb_val_sym == NULL) |
424 | continue; | |
425 | ||
426 | function_block = block; | |
427 | while (function_block != BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK) | |
428 | && function_block != BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK)) | |
429 | { | |
430 | function_block = BLOCK_SUPERBLOCK (function_block); | |
431 | function = BLOCK_FUNCTION (function_block); | |
432 | if (function != NULL) | |
433 | break; | |
434 | } | |
435 | if (function != NULL | |
436 | && (BLOCK_SUPERBLOCK (function_block) | |
437 | == BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK)) | |
078a0207 KS |
438 | && (strcmp_iw (SYMBOL_LINKAGE_NAME (function), |
439 | GCC_FE_WRAPPER_FUNCTION) | |
36de76f9 JK |
440 | == 0)) |
441 | break; | |
442 | } | |
443 | if (block_loop == nblocks) | |
444 | error (_("No \"%s\" symbol found"), COMPILE_I_EXPR_PTR_TYPE); | |
445 | ||
446 | gdb_type = SYMBOL_TYPE (gdb_val_sym); | |
f168693b | 447 | gdb_type = check_typedef (gdb_type); |
36de76f9 JK |
448 | |
449 | gdb_ptr_type_sym = block_lookup_symbol (block, COMPILE_I_EXPR_PTR_TYPE, | |
de63c46b | 450 | symbol_name_match_type::SEARCH_NAME, |
36de76f9 JK |
451 | VAR_DOMAIN); |
452 | if (gdb_ptr_type_sym == NULL) | |
453 | error (_("No \"%s\" symbol found"), COMPILE_I_EXPR_PTR_TYPE); | |
454 | gdb_ptr_type = SYMBOL_TYPE (gdb_ptr_type_sym); | |
f168693b | 455 | gdb_ptr_type = check_typedef (gdb_ptr_type); |
36de76f9 JK |
456 | if (TYPE_CODE (gdb_ptr_type) != TYPE_CODE_PTR) |
457 | error (_("Type of \"%s\" is not a pointer"), COMPILE_I_EXPR_PTR_TYPE); | |
078a0207 | 458 | gdb_type_from_ptr = check_typedef (TYPE_TARGET_TYPE (gdb_ptr_type)); |
36de76f9 JK |
459 | |
460 | if (types_deeply_equal (gdb_type, gdb_type_from_ptr)) | |
461 | { | |
462 | if (scope != COMPILE_I_PRINT_ADDRESS_SCOPE) | |
463 | error (_("Expected address scope in compiled module \"%s\"."), | |
464 | objfile_name (objfile)); | |
465 | return gdb_type; | |
466 | } | |
467 | ||
468 | if (TYPE_CODE (gdb_type) != TYPE_CODE_PTR) | |
469 | error (_("Invalid type code %d of symbol \"%s\" " | |
470 | "in compiled module \"%s\"."), | |
471 | TYPE_CODE (gdb_type_from_ptr), COMPILE_I_EXPR_VAL, | |
472 | objfile_name (objfile)); | |
473 | ||
4d18dfad | 474 | retval = gdb_type_from_ptr; |
36de76f9 JK |
475 | switch (TYPE_CODE (gdb_type_from_ptr)) |
476 | { | |
477 | case TYPE_CODE_ARRAY: | |
478 | gdb_type_from_ptr = TYPE_TARGET_TYPE (gdb_type_from_ptr); | |
479 | break; | |
480 | case TYPE_CODE_FUNC: | |
481 | break; | |
482 | default: | |
483 | error (_("Invalid type code %d of symbol \"%s\" " | |
484 | "in compiled module \"%s\"."), | |
485 | TYPE_CODE (gdb_type_from_ptr), COMPILE_I_EXPR_PTR_TYPE, | |
486 | objfile_name (objfile)); | |
487 | } | |
488 | if (!types_deeply_equal (gdb_type_from_ptr, | |
489 | TYPE_TARGET_TYPE (gdb_type))) | |
490 | error (_("Referenced types do not match for symbols \"%s\" and \"%s\" " | |
491 | "in compiled module \"%s\"."), | |
492 | COMPILE_I_EXPR_PTR_TYPE, COMPILE_I_EXPR_VAL, | |
493 | objfile_name (objfile)); | |
494 | if (scope == COMPILE_I_PRINT_ADDRESS_SCOPE) | |
495 | return NULL; | |
4d18dfad | 496 | return retval; |
36de76f9 JK |
497 | } |
498 | ||
83d3415e JK |
499 | /* Fetch the type of first parameter of FUNC_SYM. |
500 | Return NULL if FUNC_SYM has no parameters. Throw an error otherwise. */ | |
bb2ec1b3 TT |
501 | |
502 | static struct type * | |
83d3415e | 503 | get_regs_type (struct symbol *func_sym, struct objfile *objfile) |
bb2ec1b3 | 504 | { |
83d3415e JK |
505 | struct type *func_type = SYMBOL_TYPE (func_sym); |
506 | struct type *regsp_type, *regs_type; | |
bb2ec1b3 TT |
507 | |
508 | /* No register parameter present. */ | |
509 | if (TYPE_NFIELDS (func_type) == 0) | |
510 | return NULL; | |
511 | ||
bb2ec1b3 TT |
512 | regsp_type = check_typedef (TYPE_FIELD_TYPE (func_type, 0)); |
513 | if (TYPE_CODE (regsp_type) != TYPE_CODE_PTR) | |
514 | error (_("Invalid type code %d of first parameter of function \"%s\" " | |
515 | "in compiled module \"%s\"."), | |
516 | TYPE_CODE (regsp_type), GCC_FE_WRAPPER_FUNCTION, | |
517 | objfile_name (objfile)); | |
518 | ||
519 | regs_type = check_typedef (TYPE_TARGET_TYPE (regsp_type)); | |
520 | if (TYPE_CODE (regs_type) != TYPE_CODE_STRUCT) | |
521 | error (_("Invalid type code %d of dereferenced first parameter " | |
522 | "of function \"%s\" in compiled module \"%s\"."), | |
523 | TYPE_CODE (regs_type), GCC_FE_WRAPPER_FUNCTION, | |
524 | objfile_name (objfile)); | |
525 | ||
526 | return regs_type; | |
527 | } | |
528 | ||
529 | /* Store all inferior registers required by REGS_TYPE to inferior memory | |
530 | starting at inferior address REGS_BASE. */ | |
531 | ||
532 | static void | |
533 | store_regs (struct type *regs_type, CORE_ADDR regs_base) | |
534 | { | |
535 | struct gdbarch *gdbarch = target_gdbarch (); | |
bb2ec1b3 TT |
536 | int fieldno; |
537 | ||
538 | for (fieldno = 0; fieldno < TYPE_NFIELDS (regs_type); fieldno++) | |
539 | { | |
540 | const char *reg_name = TYPE_FIELD_NAME (regs_type, fieldno); | |
541 | ULONGEST reg_bitpos = TYPE_FIELD_BITPOS (regs_type, fieldno); | |
542 | ULONGEST reg_bitsize = TYPE_FIELD_BITSIZE (regs_type, fieldno); | |
543 | ULONGEST reg_offset; | |
544 | struct type *reg_type = check_typedef (TYPE_FIELD_TYPE (regs_type, | |
545 | fieldno)); | |
546 | ULONGEST reg_size = TYPE_LENGTH (reg_type); | |
547 | int regnum; | |
548 | struct value *regval; | |
549 | CORE_ADDR inferior_addr; | |
550 | ||
551 | if (strcmp (reg_name, COMPILE_I_SIMPLE_REGISTER_DUMMY) == 0) | |
552 | continue; | |
553 | ||
554 | if ((reg_bitpos % 8) != 0 || reg_bitsize != 0) | |
555 | error (_("Invalid register \"%s\" position %s bits or size %s bits"), | |
556 | reg_name, pulongest (reg_bitpos), pulongest (reg_bitsize)); | |
557 | reg_offset = reg_bitpos / 8; | |
558 | ||
559 | if (TYPE_CODE (reg_type) != TYPE_CODE_INT | |
560 | && TYPE_CODE (reg_type) != TYPE_CODE_PTR) | |
561 | error (_("Invalid register \"%s\" type code %d"), reg_name, | |
562 | TYPE_CODE (reg_type)); | |
563 | ||
564 | regnum = compile_register_name_demangle (gdbarch, reg_name); | |
565 | ||
566 | regval = value_from_register (reg_type, regnum, get_current_frame ()); | |
567 | if (value_optimized_out (regval)) | |
568 | error (_("Register \"%s\" is optimized out."), reg_name); | |
569 | if (!value_entirely_available (regval)) | |
570 | error (_("Register \"%s\" is not available."), reg_name); | |
571 | ||
572 | inferior_addr = regs_base + reg_offset; | |
573 | if (0 != target_write_memory (inferior_addr, value_contents (regval), | |
574 | reg_size)) | |
575 | error (_("Cannot write register \"%s\" to inferior memory at %s."), | |
576 | reg_name, paddress (gdbarch, inferior_addr)); | |
577 | } | |
578 | } | |
579 | ||
aaee65ae PA |
580 | /* Load the object file specified in FILE_NAMES into inferior memory. |
581 | Throw an error otherwise. Caller must fully dispose the return | |
582 | value by calling compile_object_run. Returns NULL only for | |
583 | COMPILE_I_PRINT_ADDRESS_SCOPE when COMPILE_I_PRINT_VALUE_SCOPE | |
584 | should have been used instead. */ | |
bb2ec1b3 TT |
585 | |
586 | struct compile_module * | |
aaee65ae | 587 | compile_object_load (const compile_file_names &file_names, |
5c65b58a | 588 | enum compile_i_scope_types scope, void *scope_data) |
bb2ec1b3 | 589 | { |
bb2ec1b3 | 590 | struct setup_sections_data setup_sections_data; |
798a7429 | 591 | CORE_ADDR regs_addr, out_value_addr = 0; |
83d3415e JK |
592 | struct symbol *func_sym; |
593 | struct type *func_type; | |
bb2ec1b3 TT |
594 | struct bound_minimal_symbol bmsym; |
595 | long storage_needed; | |
596 | asymbol **symbol_table, **symp; | |
597 | long number_of_symbols, missing_symbols; | |
bb2ec1b3 | 598 | struct compile_module *retval; |
36de76f9 | 599 | struct type *regs_type, *out_value_type = NULL; |
ee0c3293 | 600 | char **matching; |
bb2ec1b3 | 601 | struct objfile *objfile; |
83d3415e JK |
602 | int expect_parameters; |
603 | struct type *expect_return_type; | |
bb2ec1b3 | 604 | |
ee0c3293 TT |
605 | gdb::unique_xmalloc_ptr<char> filename |
606 | (tilde_expand (file_names.object_file ())); | |
bb2ec1b3 | 607 | |
ee0c3293 | 608 | gdb_bfd_ref_ptr abfd (gdb_bfd_open (filename.get (), gnutarget, -1)); |
bb2ec1b3 TT |
609 | if (abfd == NULL) |
610 | error (_("\"%s\": could not open as compiled module: %s"), | |
ee0c3293 | 611 | filename.get (), bfd_errmsg (bfd_get_error ())); |
bb2ec1b3 | 612 | |
192b62ce | 613 | if (!bfd_check_format_matches (abfd.get (), bfd_object, &matching)) |
bb2ec1b3 | 614 | error (_("\"%s\": not in loadable format: %s"), |
803c08d0 TT |
615 | filename.get (), |
616 | gdb_bfd_errmsg (bfd_get_error (), matching).c_str ()); | |
bb2ec1b3 | 617 | |
192b62ce | 618 | if ((bfd_get_file_flags (abfd.get ()) & (EXEC_P | DYNAMIC)) != 0) |
ee0c3293 | 619 | error (_("\"%s\": not in object format."), filename.get ()); |
bb2ec1b3 TT |
620 | |
621 | setup_sections_data.last_size = 0; | |
622 | setup_sections_data.last_section_first = abfd->sections; | |
623 | setup_sections_data.last_prot = -1; | |
624 | setup_sections_data.last_max_alignment = 1; | |
c9e0a7e3 TT |
625 | setup_sections_data.munmap_list.reset (new struct munmap_list); |
626 | ||
192b62ce TT |
627 | bfd_map_over_sections (abfd.get (), setup_sections, &setup_sections_data); |
628 | setup_sections (abfd.get (), NULL, &setup_sections_data); | |
bb2ec1b3 | 629 | |
192b62ce | 630 | storage_needed = bfd_get_symtab_upper_bound (abfd.get ()); |
bb2ec1b3 TT |
631 | if (storage_needed < 0) |
632 | error (_("Cannot read symbols of compiled module \"%s\": %s"), | |
c9e0a7e3 | 633 | filename.get (), bfd_errmsg (bfd_get_error ())); |
bb2ec1b3 TT |
634 | |
635 | /* SYMFILE_VERBOSE is not passed even if FROM_TTY, user is not interested in | |
636 | "Reading symbols from ..." message for automatically generated file. */ | |
ed2b3126 TT |
637 | std::unique_ptr<struct objfile> objfile_holder |
638 | (symbol_file_add_from_bfd (abfd.get (), filename.get (), | |
639 | 0, NULL, 0, NULL)); | |
640 | objfile = objfile_holder.get (); | |
bb2ec1b3 | 641 | |
83d3415e JK |
642 | func_sym = lookup_global_symbol_from_objfile (objfile, |
643 | GCC_FE_WRAPPER_FUNCTION, | |
d12307c1 | 644 | VAR_DOMAIN).symbol; |
83d3415e JK |
645 | if (func_sym == NULL) |
646 | error (_("Cannot find function \"%s\" in compiled module \"%s\"."), | |
647 | GCC_FE_WRAPPER_FUNCTION, objfile_name (objfile)); | |
648 | func_type = SYMBOL_TYPE (func_sym); | |
649 | if (TYPE_CODE (func_type) != TYPE_CODE_FUNC) | |
650 | error (_("Invalid type code %d of function \"%s\" in compiled " | |
651 | "module \"%s\"."), | |
652 | TYPE_CODE (func_type), GCC_FE_WRAPPER_FUNCTION, | |
653 | objfile_name (objfile)); | |
654 | ||
655 | switch (scope) | |
656 | { | |
657 | case COMPILE_I_SIMPLE_SCOPE: | |
658 | expect_parameters = 1; | |
659 | expect_return_type = builtin_type (target_gdbarch ())->builtin_void; | |
660 | break; | |
661 | case COMPILE_I_RAW_SCOPE: | |
662 | expect_parameters = 0; | |
663 | expect_return_type = builtin_type (target_gdbarch ())->builtin_void; | |
664 | break; | |
36de76f9 JK |
665 | case COMPILE_I_PRINT_ADDRESS_SCOPE: |
666 | case COMPILE_I_PRINT_VALUE_SCOPE: | |
667 | expect_parameters = 2; | |
668 | expect_return_type = builtin_type (target_gdbarch ())->builtin_void; | |
669 | break; | |
83d3415e JK |
670 | default: |
671 | internal_error (__FILE__, __LINE__, _("invalid scope %d"), scope); | |
672 | } | |
673 | if (TYPE_NFIELDS (func_type) != expect_parameters) | |
674 | error (_("Invalid %d parameters of function \"%s\" in compiled " | |
675 | "module \"%s\"."), | |
676 | TYPE_NFIELDS (func_type), GCC_FE_WRAPPER_FUNCTION, | |
677 | objfile_name (objfile)); | |
678 | if (!types_deeply_equal (expect_return_type, TYPE_TARGET_TYPE (func_type))) | |
679 | error (_("Invalid return type of function \"%s\" in compiled " | |
c9e0a7e3 TT |
680 | "module \"%s\"."), |
681 | GCC_FE_WRAPPER_FUNCTION, objfile_name (objfile)); | |
bb2ec1b3 TT |
682 | |
683 | /* The memory may be later needed | |
684 | by bfd_generic_get_relocated_section_contents | |
685 | called from default_symfile_relocate. */ | |
224c3ddb SM |
686 | symbol_table = (asymbol **) obstack_alloc (&objfile->objfile_obstack, |
687 | storage_needed); | |
192b62ce | 688 | number_of_symbols = bfd_canonicalize_symtab (abfd.get (), symbol_table); |
bb2ec1b3 TT |
689 | if (number_of_symbols < 0) |
690 | error (_("Cannot parse symbols of compiled module \"%s\": %s"), | |
c9e0a7e3 | 691 | filename.get (), bfd_errmsg (bfd_get_error ())); |
bb2ec1b3 TT |
692 | |
693 | missing_symbols = 0; | |
694 | for (symp = symbol_table; symp < symbol_table + number_of_symbols; symp++) | |
695 | { | |
696 | asymbol *sym = *symp; | |
697 | ||
698 | if (sym->flags != 0) | |
699 | continue; | |
bb2ec1b3 TT |
700 | sym->flags = BSF_GLOBAL; |
701 | sym->section = bfd_abs_section_ptr; | |
702 | if (strcmp (sym->name, "_GLOBAL_OFFSET_TABLE_") == 0) | |
703 | { | |
b0fd6b30 JK |
704 | if (compile_debug) |
705 | fprintf_unfiltered (gdb_stdlog, | |
706 | "ELF symbol \"%s\" relocated to zero\n", | |
707 | sym->name); | |
708 | ||
709 | /* It seems to be a GCC bug, with -mcmodel=large there should be no | |
710 | need for _GLOBAL_OFFSET_TABLE_. Together with -fPIE the data | |
711 | remain PC-relative even with _GLOBAL_OFFSET_TABLE_ as zero. */ | |
bb2ec1b3 TT |
712 | sym->value = 0; |
713 | continue; | |
714 | } | |
715 | bmsym = lookup_minimal_symbol (sym->name, NULL, NULL); | |
716 | switch (bmsym.minsym == NULL | |
717 | ? mst_unknown : MSYMBOL_TYPE (bmsym.minsym)) | |
718 | { | |
719 | case mst_text: | |
078a0207 KS |
720 | case mst_bss: |
721 | case mst_data: | |
bb2ec1b3 | 722 | sym->value = BMSYMBOL_VALUE_ADDRESS (bmsym); |
b0fd6b30 JK |
723 | if (compile_debug) |
724 | fprintf_unfiltered (gdb_stdlog, | |
725 | "ELF mst_text symbol \"%s\" relocated to %s\n", | |
726 | sym->name, | |
727 | paddress (target_gdbarch (), sym->value)); | |
bb2ec1b3 | 728 | break; |
e26efa40 JK |
729 | case mst_text_gnu_ifunc: |
730 | sym->value = gnu_ifunc_resolve_addr (target_gdbarch (), | |
731 | BMSYMBOL_VALUE_ADDRESS (bmsym)); | |
b0fd6b30 JK |
732 | if (compile_debug) |
733 | fprintf_unfiltered (gdb_stdlog, | |
734 | "ELF mst_text_gnu_ifunc symbol \"%s\" " | |
735 | "relocated to %s\n", | |
736 | sym->name, | |
737 | paddress (target_gdbarch (), sym->value)); | |
e26efa40 | 738 | break; |
bb2ec1b3 TT |
739 | default: |
740 | warning (_("Could not find symbol \"%s\" " | |
741 | "for compiled module \"%s\"."), | |
ee0c3293 | 742 | sym->name, filename.get ()); |
bb2ec1b3 TT |
743 | missing_symbols++; |
744 | } | |
745 | } | |
746 | if (missing_symbols) | |
747 | error (_("%ld symbols were missing, cannot continue."), missing_symbols); | |
748 | ||
192b62ce | 749 | bfd_map_over_sections (abfd.get (), copy_sections, symbol_table); |
bb2ec1b3 | 750 | |
83d3415e | 751 | regs_type = get_regs_type (func_sym, objfile); |
bb2ec1b3 TT |
752 | if (regs_type == NULL) |
753 | regs_addr = 0; | |
754 | else | |
755 | { | |
756 | /* Use read-only non-executable memory protection. */ | |
757 | regs_addr = gdbarch_infcall_mmap (target_gdbarch (), | |
758 | TYPE_LENGTH (regs_type), | |
759 | GDB_MMAP_PROT_READ); | |
760 | gdb_assert (regs_addr != 0); | |
c9e0a7e3 | 761 | setup_sections_data.munmap_list->add (regs_addr, TYPE_LENGTH (regs_type)); |
b6de3f96 | 762 | if (compile_debug) |
a4063588 | 763 | fprintf_unfiltered (gdb_stdlog, |
b6de3f96 JK |
764 | "allocated %s bytes at %s for registers\n", |
765 | paddress (target_gdbarch (), | |
766 | TYPE_LENGTH (regs_type)), | |
767 | paddress (target_gdbarch (), regs_addr)); | |
bb2ec1b3 TT |
768 | store_regs (regs_type, regs_addr); |
769 | } | |
770 | ||
36de76f9 JK |
771 | if (scope == COMPILE_I_PRINT_ADDRESS_SCOPE |
772 | || scope == COMPILE_I_PRINT_VALUE_SCOPE) | |
773 | { | |
774 | out_value_type = get_out_value_type (func_sym, objfile, scope); | |
775 | if (out_value_type == NULL) | |
c9e0a7e3 | 776 | return NULL; |
36de76f9 JK |
777 | check_typedef (out_value_type); |
778 | out_value_addr = gdbarch_infcall_mmap (target_gdbarch (), | |
779 | TYPE_LENGTH (out_value_type), | |
780 | (GDB_MMAP_PROT_READ | |
781 | | GDB_MMAP_PROT_WRITE)); | |
782 | gdb_assert (out_value_addr != 0); | |
c9e0a7e3 TT |
783 | setup_sections_data.munmap_list->add (out_value_addr, |
784 | TYPE_LENGTH (out_value_type)); | |
36de76f9 | 785 | if (compile_debug) |
a4063588 | 786 | fprintf_unfiltered (gdb_stdlog, |
36de76f9 JK |
787 | "allocated %s bytes at %s for printed value\n", |
788 | paddress (target_gdbarch (), | |
789 | TYPE_LENGTH (out_value_type)), | |
790 | paddress (target_gdbarch (), out_value_addr)); | |
791 | } | |
792 | ||
8d749320 | 793 | retval = XNEW (struct compile_module); |
ed2b3126 | 794 | retval->objfile = objfile_holder.release (); |
aaee65ae | 795 | retval->source_file = xstrdup (file_names.source_file ()); |
83d3415e | 796 | retval->func_sym = func_sym; |
bb2ec1b3 | 797 | retval->regs_addr = regs_addr; |
5c65b58a JK |
798 | retval->scope = scope; |
799 | retval->scope_data = scope_data; | |
36de76f9 JK |
800 | retval->out_value_type = out_value_type; |
801 | retval->out_value_addr = out_value_addr; | |
c9e0a7e3 | 802 | retval->munmap_list_head = setup_sections_data.munmap_list.release (); |
7f361056 | 803 | |
bb2ec1b3 TT |
804 | return retval; |
805 | } |