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 | 52 | { |
a70b8144 | 53 | try |
40f03055 TT |
54 | { |
55 | gdbarch_infcall_munmap (target_gdbarch (), item.addr, item.size); | |
56 | } | |
230d2906 | 57 | catch (const gdb_exception_error &ex) |
40f03055 TT |
58 | { |
59 | /* There's not much the user can do, so just ignore | |
60 | this. */ | |
61 | } | |
40f03055 | 62 | } |
7f361056 JK |
63 | } |
64 | ||
bb2ec1b3 TT |
65 | /* Helper data for setup_sections. */ |
66 | ||
67 | struct setup_sections_data | |
68 | { | |
69 | /* Size of all recent sections with matching LAST_PROT. */ | |
70 | CORE_ADDR last_size; | |
71 | ||
72 | /* First section matching LAST_PROT. */ | |
73 | asection *last_section_first; | |
74 | ||
75 | /* Memory protection like the prot parameter of gdbarch_infcall_mmap. */ | |
76 | unsigned last_prot; | |
77 | ||
78 | /* Maximum of alignments of all sections matching LAST_PROT. | |
79 | This value is always at least 1. This value is always a power of 2. */ | |
80 | CORE_ADDR last_max_alignment; | |
7f361056 JK |
81 | |
82 | /* List of inferior mmap ranges where setup_sections should add its | |
83 | next range. */ | |
c9e0a7e3 | 84 | std::unique_ptr<struct munmap_list> munmap_list; |
bb2ec1b3 TT |
85 | }; |
86 | ||
87 | /* Place all ABFD sections next to each other obeying all constraints. */ | |
88 | ||
89 | static void | |
90 | setup_sections (bfd *abfd, asection *sect, void *data_voidp) | |
91 | { | |
9a3c8263 | 92 | struct setup_sections_data *data = (struct setup_sections_data *) data_voidp; |
bb2ec1b3 TT |
93 | CORE_ADDR alignment; |
94 | unsigned prot; | |
95 | ||
96 | if (sect != NULL) | |
97 | { | |
98 | /* It is required by later bfd_get_relocated_section_contents. */ | |
99 | if (sect->output_section == NULL) | |
100 | sect->output_section = sect; | |
101 | ||
102 | if ((bfd_get_section_flags (abfd, sect) & SEC_ALLOC) == 0) | |
103 | return; | |
104 | ||
bb2b33b9 | 105 | /* Make the memory always readable. */ |
bb2ec1b3 TT |
106 | prot = GDB_MMAP_PROT_READ; |
107 | if ((bfd_get_section_flags (abfd, sect) & SEC_READONLY) == 0) | |
108 | prot |= GDB_MMAP_PROT_WRITE; | |
109 | if ((bfd_get_section_flags (abfd, sect) & SEC_CODE) != 0) | |
110 | prot |= GDB_MMAP_PROT_EXEC; | |
111 | ||
112 | if (compile_debug) | |
a4063588 | 113 | fprintf_unfiltered (gdb_stdlog, |
bb2ec1b3 TT |
114 | "module \"%s\" section \"%s\" size %s prot %u\n", |
115 | bfd_get_filename (abfd), | |
116 | bfd_get_section_name (abfd, sect), | |
117 | paddress (target_gdbarch (), | |
118 | bfd_get_section_size (sect)), | |
119 | prot); | |
120 | } | |
121 | else | |
122 | prot = -1; | |
123 | ||
124 | if (sect == NULL | |
125 | || (data->last_prot != prot && bfd_get_section_size (sect) != 0)) | |
126 | { | |
127 | CORE_ADDR addr; | |
128 | asection *sect_iter; | |
129 | ||
130 | if (data->last_size != 0) | |
131 | { | |
132 | addr = gdbarch_infcall_mmap (target_gdbarch (), data->last_size, | |
133 | data->last_prot); | |
c9e0a7e3 | 134 | data->munmap_list->add (addr, data->last_size); |
bb2ec1b3 | 135 | if (compile_debug) |
a4063588 | 136 | fprintf_unfiltered (gdb_stdlog, |
bb2ec1b3 TT |
137 | "allocated %s bytes at %s prot %u\n", |
138 | paddress (target_gdbarch (), data->last_size), | |
139 | paddress (target_gdbarch (), addr), | |
140 | data->last_prot); | |
141 | } | |
142 | else | |
143 | addr = 0; | |
144 | ||
145 | if ((addr & (data->last_max_alignment - 1)) != 0) | |
146 | error (_("Inferior compiled module address %s " | |
147 | "is not aligned to BFD required %s."), | |
148 | paddress (target_gdbarch (), addr), | |
149 | paddress (target_gdbarch (), data->last_max_alignment)); | |
150 | ||
151 | for (sect_iter = data->last_section_first; sect_iter != sect; | |
152 | sect_iter = sect_iter->next) | |
153 | if ((bfd_get_section_flags (abfd, sect_iter) & SEC_ALLOC) != 0) | |
154 | bfd_set_section_vma (abfd, sect_iter, | |
155 | addr + bfd_get_section_vma (abfd, sect_iter)); | |
156 | ||
157 | data->last_size = 0; | |
158 | data->last_section_first = sect; | |
159 | data->last_prot = prot; | |
160 | data->last_max_alignment = 1; | |
161 | } | |
162 | ||
163 | if (sect == NULL) | |
164 | return; | |
165 | ||
166 | alignment = ((CORE_ADDR) 1) << bfd_get_section_alignment (abfd, sect); | |
325fac50 | 167 | data->last_max_alignment = std::max (data->last_max_alignment, alignment); |
bb2ec1b3 TT |
168 | |
169 | data->last_size = (data->last_size + alignment - 1) & -alignment; | |
170 | ||
171 | bfd_set_section_vma (abfd, sect, data->last_size); | |
172 | ||
173 | data->last_size += bfd_get_section_size (sect); | |
174 | data->last_size = (data->last_size + alignment - 1) & -alignment; | |
175 | } | |
176 | ||
177 | /* Helper for link_callbacks callbacks vector. */ | |
178 | ||
1a72702b | 179 | static void |
bb2ec1b3 TT |
180 | link_callbacks_multiple_definition (struct bfd_link_info *link_info, |
181 | struct bfd_link_hash_entry *h, bfd *nbfd, | |
182 | asection *nsec, bfd_vma nval) | |
183 | { | |
184 | bfd *abfd = link_info->input_bfds; | |
185 | ||
186 | if (link_info->allow_multiple_definition) | |
1a72702b | 187 | return; |
8e8347b8 | 188 | warning (_("Compiled module \"%s\": multiple symbol definitions: %s"), |
bb2ec1b3 | 189 | bfd_get_filename (abfd), h->root.string); |
bb2ec1b3 TT |
190 | } |
191 | ||
192 | /* Helper for link_callbacks callbacks vector. */ | |
193 | ||
1a72702b | 194 | static void |
bb2ec1b3 TT |
195 | link_callbacks_warning (struct bfd_link_info *link_info, const char *xwarning, |
196 | const char *symbol, bfd *abfd, asection *section, | |
197 | bfd_vma address) | |
198 | { | |
8e8347b8 | 199 | warning (_("Compiled module \"%s\" section \"%s\": warning: %s"), |
bb2ec1b3 TT |
200 | bfd_get_filename (abfd), bfd_get_section_name (abfd, section), |
201 | xwarning); | |
bb2ec1b3 TT |
202 | } |
203 | ||
204 | /* Helper for link_callbacks callbacks vector. */ | |
205 | ||
1a72702b | 206 | static void |
bb2ec1b3 TT |
207 | link_callbacks_undefined_symbol (struct bfd_link_info *link_info, |
208 | const char *name, bfd *abfd, asection *section, | |
209 | bfd_vma address, bfd_boolean is_fatal) | |
210 | { | |
211 | warning (_("Cannot resolve relocation to \"%s\" " | |
212 | "from compiled module \"%s\" section \"%s\"."), | |
213 | name, bfd_get_filename (abfd), bfd_get_section_name (abfd, section)); | |
bb2ec1b3 TT |
214 | } |
215 | ||
216 | /* Helper for link_callbacks callbacks vector. */ | |
217 | ||
1a72702b | 218 | static void |
bb2ec1b3 TT |
219 | link_callbacks_reloc_overflow (struct bfd_link_info *link_info, |
220 | struct bfd_link_hash_entry *entry, | |
221 | const char *name, const char *reloc_name, | |
222 | bfd_vma addend, bfd *abfd, asection *section, | |
223 | bfd_vma address) | |
224 | { | |
bb2ec1b3 TT |
225 | } |
226 | ||
227 | /* Helper for link_callbacks callbacks vector. */ | |
228 | ||
1a72702b | 229 | static void |
bb2ec1b3 TT |
230 | link_callbacks_reloc_dangerous (struct bfd_link_info *link_info, |
231 | const char *message, bfd *abfd, | |
232 | asection *section, bfd_vma address) | |
233 | { | |
234 | warning (_("Compiled module \"%s\" section \"%s\": dangerous " | |
235 | "relocation: %s\n"), | |
236 | bfd_get_filename (abfd), bfd_get_section_name (abfd, section), | |
237 | message); | |
bb2ec1b3 TT |
238 | } |
239 | ||
240 | /* Helper for link_callbacks callbacks vector. */ | |
241 | ||
1a72702b | 242 | static void |
bb2ec1b3 TT |
243 | link_callbacks_unattached_reloc (struct bfd_link_info *link_info, |
244 | const char *name, bfd *abfd, asection *section, | |
245 | bfd_vma address) | |
246 | { | |
247 | warning (_("Compiled module \"%s\" section \"%s\": unattached " | |
248 | "relocation: %s\n"), | |
249 | bfd_get_filename (abfd), bfd_get_section_name (abfd, section), | |
250 | name); | |
bb2ec1b3 TT |
251 | } |
252 | ||
253 | /* Helper for link_callbacks callbacks vector. */ | |
254 | ||
77b64a49 PA |
255 | static void link_callbacks_einfo (const char *fmt, ...) |
256 | ATTRIBUTE_PRINTF (1, 2); | |
257 | ||
bb2ec1b3 TT |
258 | static void |
259 | link_callbacks_einfo (const char *fmt, ...) | |
260 | { | |
bb2ec1b3 | 261 | va_list ap; |
bb2ec1b3 TT |
262 | |
263 | va_start (ap, fmt); | |
20dcd8ca | 264 | std::string str = string_vprintf (fmt, ap); |
bb2ec1b3 | 265 | va_end (ap); |
bb2ec1b3 | 266 | |
20dcd8ca | 267 | warning (_("Compile module: warning: %s"), str.c_str ()); |
bb2ec1b3 TT |
268 | } |
269 | ||
270 | /* Helper for bfd_get_relocated_section_contents. | |
271 | Only these symbols are set by bfd_simple_get_relocated_section_contents | |
272 | but bfd/ seems to use even the NULL ones without checking them first. */ | |
273 | ||
274 | static const struct bfd_link_callbacks link_callbacks = | |
275 | { | |
276 | NULL, /* add_archive_element */ | |
277 | link_callbacks_multiple_definition, /* multiple_definition */ | |
278 | NULL, /* multiple_common */ | |
279 | NULL, /* add_to_set */ | |
280 | NULL, /* constructor */ | |
281 | link_callbacks_warning, /* warning */ | |
282 | link_callbacks_undefined_symbol, /* undefined_symbol */ | |
283 | link_callbacks_reloc_overflow, /* reloc_overflow */ | |
284 | link_callbacks_reloc_dangerous, /* reloc_dangerous */ | |
285 | link_callbacks_unattached_reloc, /* unattached_reloc */ | |
286 | NULL, /* notice */ | |
287 | link_callbacks_einfo, /* einfo */ | |
288 | NULL, /* info */ | |
289 | NULL, /* minfo */ | |
290 | NULL, /* override_segment_assignment */ | |
291 | }; | |
292 | ||
293 | struct link_hash_table_cleanup_data | |
294 | { | |
40f03055 TT |
295 | explicit link_hash_table_cleanup_data (bfd *abfd_) |
296 | : abfd (abfd_), | |
297 | link_next (abfd->link.next) | |
298 | { | |
299 | } | |
bb2ec1b3 | 300 | |
40f03055 TT |
301 | ~link_hash_table_cleanup_data () |
302 | { | |
303 | if (abfd->is_linker_output) | |
304 | (*abfd->link.hash->hash_table_free) (abfd); | |
305 | abfd->link.next = link_next; | |
306 | } | |
bb2ec1b3 | 307 | |
40f03055 | 308 | DISABLE_COPY_AND_ASSIGN (link_hash_table_cleanup_data); |
bb2ec1b3 | 309 | |
40f03055 TT |
310 | private: |
311 | ||
312 | bfd *abfd; | |
313 | bfd *link_next; | |
314 | }; | |
bb2ec1b3 TT |
315 | |
316 | /* Relocate and store into inferior memory each section SECT of ABFD. */ | |
317 | ||
318 | static void | |
319 | copy_sections (bfd *abfd, asection *sect, void *data) | |
320 | { | |
9a3c8263 | 321 | asymbol **symbol_table = (asymbol **) data; |
40f03055 | 322 | bfd_byte *sect_data_got; |
bb2ec1b3 TT |
323 | struct bfd_link_info link_info; |
324 | struct bfd_link_order link_order; | |
325 | CORE_ADDR inferior_addr; | |
bb2ec1b3 TT |
326 | |
327 | if ((bfd_get_section_flags (abfd, sect) & (SEC_ALLOC | SEC_LOAD)) | |
328 | != (SEC_ALLOC | SEC_LOAD)) | |
329 | return; | |
330 | ||
331 | if (bfd_get_section_size (sect) == 0) | |
332 | return; | |
333 | ||
334 | /* Mostly a copy of bfd_simple_get_relocated_section_contents which GDB | |
335 | cannot use as it does not report relocations to undefined symbols. */ | |
336 | memset (&link_info, 0, sizeof (link_info)); | |
337 | link_info.output_bfd = abfd; | |
338 | link_info.input_bfds = abfd; | |
339 | link_info.input_bfds_tail = &abfd->link.next; | |
340 | ||
40f03055 | 341 | struct link_hash_table_cleanup_data cleanup_data (abfd); |
bb2ec1b3 TT |
342 | |
343 | abfd->link.next = NULL; | |
344 | link_info.hash = bfd_link_hash_table_create (abfd); | |
345 | ||
bb2ec1b3 TT |
346 | link_info.callbacks = &link_callbacks; |
347 | ||
348 | memset (&link_order, 0, sizeof (link_order)); | |
349 | link_order.next = NULL; | |
350 | link_order.type = bfd_indirect_link_order; | |
351 | link_order.offset = 0; | |
352 | link_order.size = bfd_get_section_size (sect); | |
353 | link_order.u.indirect.section = sect; | |
354 | ||
40f03055 TT |
355 | gdb::unique_xmalloc_ptr<gdb_byte> sect_data |
356 | ((bfd_byte *) xmalloc (bfd_get_section_size (sect))); | |
bb2ec1b3 TT |
357 | |
358 | sect_data_got = bfd_get_relocated_section_contents (abfd, &link_info, | |
40f03055 TT |
359 | &link_order, |
360 | sect_data.get (), | |
bb2ec1b3 TT |
361 | FALSE, symbol_table); |
362 | ||
363 | if (sect_data_got == NULL) | |
364 | error (_("Cannot map compiled module \"%s\" section \"%s\": %s"), | |
365 | bfd_get_filename (abfd), bfd_get_section_name (abfd, sect), | |
366 | bfd_errmsg (bfd_get_error ())); | |
40f03055 | 367 | gdb_assert (sect_data_got == sect_data.get ()); |
bb2ec1b3 TT |
368 | |
369 | inferior_addr = bfd_get_section_vma (abfd, sect); | |
40f03055 | 370 | if (0 != target_write_memory (inferior_addr, sect_data.get (), |
bb2ec1b3 TT |
371 | bfd_get_section_size (sect))) |
372 | error (_("Cannot write compiled module \"%s\" section \"%s\" " | |
373 | "to inferior memory range %s-%s."), | |
374 | bfd_get_filename (abfd), bfd_get_section_name (abfd, sect), | |
375 | paddress (target_gdbarch (), inferior_addr), | |
376 | paddress (target_gdbarch (), | |
377 | inferior_addr + bfd_get_section_size (sect))); | |
bb2ec1b3 TT |
378 | } |
379 | ||
36de76f9 JK |
380 | /* Fetch the type of COMPILE_I_EXPR_PTR_TYPE and COMPILE_I_EXPR_VAL |
381 | symbols in OBJFILE so we can calculate how much memory to allocate | |
382 | for the out parameter. This avoids needing a malloc in the generated | |
383 | code. Throw an error if anything fails. | |
384 | GDB first tries to compile the code with COMPILE_I_PRINT_ADDRESS_SCOPE. | |
385 | If it finds user tries to print an array type this function returns | |
386 | NULL. Caller will then regenerate the code with | |
387 | COMPILE_I_PRINT_VALUE_SCOPE, recompiles it again and finally runs it. | |
388 | This is because __auto_type array-to-pointer type conversion of | |
389 | COMPILE_I_EXPR_VAL which gets detected by COMPILE_I_EXPR_PTR_TYPE | |
390 | preserving the array type. */ | |
391 | ||
392 | static struct type * | |
393 | get_out_value_type (struct symbol *func_sym, struct objfile *objfile, | |
394 | enum compile_i_scope_types scope) | |
395 | { | |
d976bace JK |
396 | struct symbol *gdb_ptr_type_sym; |
397 | /* Initialize it just to avoid a GCC false warning. */ | |
398 | struct symbol *gdb_val_sym = NULL; | |
4d18dfad | 399 | struct type *gdb_ptr_type, *gdb_type_from_ptr, *gdb_type, *retval; |
d976bace JK |
400 | /* Initialize it just to avoid a GCC false warning. */ |
401 | const struct block *block = NULL; | |
36de76f9 JK |
402 | const struct blockvector *bv; |
403 | int nblocks = 0; | |
404 | int block_loop = 0; | |
405 | ||
406 | bv = SYMTAB_BLOCKVECTOR (func_sym->owner.symtab); | |
407 | nblocks = BLOCKVECTOR_NBLOCKS (bv); | |
408 | ||
409 | gdb_ptr_type_sym = NULL; | |
410 | for (block_loop = 0; block_loop < nblocks; block_loop++) | |
411 | { | |
d976bace | 412 | struct symbol *function = NULL; |
36de76f9 JK |
413 | const struct block *function_block; |
414 | ||
415 | block = BLOCKVECTOR_BLOCK (bv, block_loop); | |
416 | if (BLOCK_FUNCTION (block) != NULL) | |
417 | continue; | |
de63c46b PA |
418 | gdb_val_sym = block_lookup_symbol (block, |
419 | COMPILE_I_EXPR_VAL, | |
420 | symbol_name_match_type::SEARCH_NAME, | |
421 | VAR_DOMAIN); | |
36de76f9 JK |
422 | if (gdb_val_sym == NULL) |
423 | continue; | |
424 | ||
425 | function_block = block; | |
426 | while (function_block != BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK) | |
427 | && function_block != BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK)) | |
428 | { | |
429 | function_block = BLOCK_SUPERBLOCK (function_block); | |
430 | function = BLOCK_FUNCTION (function_block); | |
431 | if (function != NULL) | |
432 | break; | |
433 | } | |
434 | if (function != NULL | |
435 | && (BLOCK_SUPERBLOCK (function_block) | |
436 | == BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK)) | |
078a0207 KS |
437 | && (strcmp_iw (SYMBOL_LINKAGE_NAME (function), |
438 | GCC_FE_WRAPPER_FUNCTION) | |
36de76f9 JK |
439 | == 0)) |
440 | break; | |
441 | } | |
442 | if (block_loop == nblocks) | |
443 | error (_("No \"%s\" symbol found"), COMPILE_I_EXPR_PTR_TYPE); | |
444 | ||
445 | gdb_type = SYMBOL_TYPE (gdb_val_sym); | |
f168693b | 446 | gdb_type = check_typedef (gdb_type); |
36de76f9 JK |
447 | |
448 | gdb_ptr_type_sym = block_lookup_symbol (block, COMPILE_I_EXPR_PTR_TYPE, | |
de63c46b | 449 | symbol_name_match_type::SEARCH_NAME, |
36de76f9 JK |
450 | VAR_DOMAIN); |
451 | if (gdb_ptr_type_sym == NULL) | |
452 | error (_("No \"%s\" symbol found"), COMPILE_I_EXPR_PTR_TYPE); | |
453 | gdb_ptr_type = SYMBOL_TYPE (gdb_ptr_type_sym); | |
f168693b | 454 | gdb_ptr_type = check_typedef (gdb_ptr_type); |
36de76f9 JK |
455 | if (TYPE_CODE (gdb_ptr_type) != TYPE_CODE_PTR) |
456 | error (_("Type of \"%s\" is not a pointer"), COMPILE_I_EXPR_PTR_TYPE); | |
078a0207 | 457 | gdb_type_from_ptr = check_typedef (TYPE_TARGET_TYPE (gdb_ptr_type)); |
36de76f9 JK |
458 | |
459 | if (types_deeply_equal (gdb_type, gdb_type_from_ptr)) | |
460 | { | |
461 | if (scope != COMPILE_I_PRINT_ADDRESS_SCOPE) | |
462 | error (_("Expected address scope in compiled module \"%s\"."), | |
463 | objfile_name (objfile)); | |
464 | return gdb_type; | |
465 | } | |
466 | ||
467 | if (TYPE_CODE (gdb_type) != TYPE_CODE_PTR) | |
468 | error (_("Invalid type code %d of symbol \"%s\" " | |
469 | "in compiled module \"%s\"."), | |
470 | TYPE_CODE (gdb_type_from_ptr), COMPILE_I_EXPR_VAL, | |
471 | objfile_name (objfile)); | |
472 | ||
4d18dfad | 473 | retval = gdb_type_from_ptr; |
36de76f9 JK |
474 | switch (TYPE_CODE (gdb_type_from_ptr)) |
475 | { | |
476 | case TYPE_CODE_ARRAY: | |
477 | gdb_type_from_ptr = TYPE_TARGET_TYPE (gdb_type_from_ptr); | |
478 | break; | |
479 | case TYPE_CODE_FUNC: | |
480 | break; | |
481 | default: | |
482 | error (_("Invalid type code %d of symbol \"%s\" " | |
483 | "in compiled module \"%s\"."), | |
484 | TYPE_CODE (gdb_type_from_ptr), COMPILE_I_EXPR_PTR_TYPE, | |
485 | objfile_name (objfile)); | |
486 | } | |
487 | if (!types_deeply_equal (gdb_type_from_ptr, | |
488 | TYPE_TARGET_TYPE (gdb_type))) | |
489 | error (_("Referenced types do not match for symbols \"%s\" and \"%s\" " | |
490 | "in compiled module \"%s\"."), | |
491 | COMPILE_I_EXPR_PTR_TYPE, COMPILE_I_EXPR_VAL, | |
492 | objfile_name (objfile)); | |
493 | if (scope == COMPILE_I_PRINT_ADDRESS_SCOPE) | |
494 | return NULL; | |
4d18dfad | 495 | return retval; |
36de76f9 JK |
496 | } |
497 | ||
83d3415e JK |
498 | /* Fetch the type of first parameter of FUNC_SYM. |
499 | Return NULL if FUNC_SYM has no parameters. Throw an error otherwise. */ | |
bb2ec1b3 TT |
500 | |
501 | static struct type * | |
83d3415e | 502 | get_regs_type (struct symbol *func_sym, struct objfile *objfile) |
bb2ec1b3 | 503 | { |
83d3415e JK |
504 | struct type *func_type = SYMBOL_TYPE (func_sym); |
505 | struct type *regsp_type, *regs_type; | |
bb2ec1b3 TT |
506 | |
507 | /* No register parameter present. */ | |
508 | if (TYPE_NFIELDS (func_type) == 0) | |
509 | return NULL; | |
510 | ||
bb2ec1b3 TT |
511 | regsp_type = check_typedef (TYPE_FIELD_TYPE (func_type, 0)); |
512 | if (TYPE_CODE (regsp_type) != TYPE_CODE_PTR) | |
513 | error (_("Invalid type code %d of first parameter of function \"%s\" " | |
514 | "in compiled module \"%s\"."), | |
515 | TYPE_CODE (regsp_type), GCC_FE_WRAPPER_FUNCTION, | |
516 | objfile_name (objfile)); | |
517 | ||
518 | regs_type = check_typedef (TYPE_TARGET_TYPE (regsp_type)); | |
519 | if (TYPE_CODE (regs_type) != TYPE_CODE_STRUCT) | |
520 | error (_("Invalid type code %d of dereferenced first parameter " | |
521 | "of function \"%s\" in compiled module \"%s\"."), | |
522 | TYPE_CODE (regs_type), GCC_FE_WRAPPER_FUNCTION, | |
523 | objfile_name (objfile)); | |
524 | ||
525 | return regs_type; | |
526 | } | |
527 | ||
528 | /* Store all inferior registers required by REGS_TYPE to inferior memory | |
529 | starting at inferior address REGS_BASE. */ | |
530 | ||
531 | static void | |
532 | store_regs (struct type *regs_type, CORE_ADDR regs_base) | |
533 | { | |
534 | struct gdbarch *gdbarch = target_gdbarch (); | |
bb2ec1b3 TT |
535 | int fieldno; |
536 | ||
537 | for (fieldno = 0; fieldno < TYPE_NFIELDS (regs_type); fieldno++) | |
538 | { | |
539 | const char *reg_name = TYPE_FIELD_NAME (regs_type, fieldno); | |
540 | ULONGEST reg_bitpos = TYPE_FIELD_BITPOS (regs_type, fieldno); | |
541 | ULONGEST reg_bitsize = TYPE_FIELD_BITSIZE (regs_type, fieldno); | |
542 | ULONGEST reg_offset; | |
543 | struct type *reg_type = check_typedef (TYPE_FIELD_TYPE (regs_type, | |
544 | fieldno)); | |
545 | ULONGEST reg_size = TYPE_LENGTH (reg_type); | |
546 | int regnum; | |
547 | struct value *regval; | |
548 | CORE_ADDR inferior_addr; | |
549 | ||
550 | if (strcmp (reg_name, COMPILE_I_SIMPLE_REGISTER_DUMMY) == 0) | |
551 | continue; | |
552 | ||
553 | if ((reg_bitpos % 8) != 0 || reg_bitsize != 0) | |
554 | error (_("Invalid register \"%s\" position %s bits or size %s bits"), | |
555 | reg_name, pulongest (reg_bitpos), pulongest (reg_bitsize)); | |
556 | reg_offset = reg_bitpos / 8; | |
557 | ||
558 | if (TYPE_CODE (reg_type) != TYPE_CODE_INT | |
559 | && TYPE_CODE (reg_type) != TYPE_CODE_PTR) | |
560 | error (_("Invalid register \"%s\" type code %d"), reg_name, | |
561 | TYPE_CODE (reg_type)); | |
562 | ||
563 | regnum = compile_register_name_demangle (gdbarch, reg_name); | |
564 | ||
565 | regval = value_from_register (reg_type, regnum, get_current_frame ()); | |
566 | if (value_optimized_out (regval)) | |
567 | error (_("Register \"%s\" is optimized out."), reg_name); | |
568 | if (!value_entirely_available (regval)) | |
569 | error (_("Register \"%s\" is not available."), reg_name); | |
570 | ||
571 | inferior_addr = regs_base + reg_offset; | |
572 | if (0 != target_write_memory (inferior_addr, value_contents (regval), | |
573 | reg_size)) | |
574 | error (_("Cannot write register \"%s\" to inferior memory at %s."), | |
575 | reg_name, paddress (gdbarch, inferior_addr)); | |
576 | } | |
577 | } | |
578 | ||
aaee65ae PA |
579 | /* Load the object file specified in FILE_NAMES into inferior memory. |
580 | Throw an error otherwise. Caller must fully dispose the return | |
581 | value by calling compile_object_run. Returns NULL only for | |
582 | COMPILE_I_PRINT_ADDRESS_SCOPE when COMPILE_I_PRINT_VALUE_SCOPE | |
583 | should have been used instead. */ | |
bb2ec1b3 TT |
584 | |
585 | struct compile_module * | |
aaee65ae | 586 | compile_object_load (const compile_file_names &file_names, |
5c65b58a | 587 | enum compile_i_scope_types scope, void *scope_data) |
bb2ec1b3 | 588 | { |
bb2ec1b3 | 589 | struct setup_sections_data setup_sections_data; |
798a7429 | 590 | CORE_ADDR regs_addr, out_value_addr = 0; |
83d3415e JK |
591 | struct symbol *func_sym; |
592 | struct type *func_type; | |
bb2ec1b3 TT |
593 | struct bound_minimal_symbol bmsym; |
594 | long storage_needed; | |
595 | asymbol **symbol_table, **symp; | |
596 | long number_of_symbols, missing_symbols; | |
bb2ec1b3 | 597 | struct compile_module *retval; |
36de76f9 | 598 | struct type *regs_type, *out_value_type = NULL; |
ee0c3293 | 599 | char **matching; |
bb2ec1b3 | 600 | struct objfile *objfile; |
83d3415e JK |
601 | int expect_parameters; |
602 | struct type *expect_return_type; | |
bb2ec1b3 | 603 | |
ee0c3293 TT |
604 | gdb::unique_xmalloc_ptr<char> filename |
605 | (tilde_expand (file_names.object_file ())); | |
bb2ec1b3 | 606 | |
ee0c3293 | 607 | gdb_bfd_ref_ptr abfd (gdb_bfd_open (filename.get (), gnutarget, -1)); |
bb2ec1b3 TT |
608 | if (abfd == NULL) |
609 | error (_("\"%s\": could not open as compiled module: %s"), | |
ee0c3293 | 610 | filename.get (), bfd_errmsg (bfd_get_error ())); |
bb2ec1b3 | 611 | |
192b62ce | 612 | if (!bfd_check_format_matches (abfd.get (), bfd_object, &matching)) |
bb2ec1b3 | 613 | error (_("\"%s\": not in loadable format: %s"), |
803c08d0 TT |
614 | filename.get (), |
615 | gdb_bfd_errmsg (bfd_get_error (), matching).c_str ()); | |
bb2ec1b3 | 616 | |
192b62ce | 617 | if ((bfd_get_file_flags (abfd.get ()) & (EXEC_P | DYNAMIC)) != 0) |
ee0c3293 | 618 | error (_("\"%s\": not in object format."), filename.get ()); |
bb2ec1b3 TT |
619 | |
620 | setup_sections_data.last_size = 0; | |
621 | setup_sections_data.last_section_first = abfd->sections; | |
622 | setup_sections_data.last_prot = -1; | |
623 | setup_sections_data.last_max_alignment = 1; | |
c9e0a7e3 TT |
624 | setup_sections_data.munmap_list.reset (new struct munmap_list); |
625 | ||
192b62ce TT |
626 | bfd_map_over_sections (abfd.get (), setup_sections, &setup_sections_data); |
627 | setup_sections (abfd.get (), NULL, &setup_sections_data); | |
bb2ec1b3 | 628 | |
192b62ce | 629 | storage_needed = bfd_get_symtab_upper_bound (abfd.get ()); |
bb2ec1b3 TT |
630 | if (storage_needed < 0) |
631 | error (_("Cannot read symbols of compiled module \"%s\": %s"), | |
c9e0a7e3 | 632 | filename.get (), bfd_errmsg (bfd_get_error ())); |
bb2ec1b3 TT |
633 | |
634 | /* SYMFILE_VERBOSE is not passed even if FROM_TTY, user is not interested in | |
635 | "Reading symbols from ..." message for automatically generated file. */ | |
ed2b3126 TT |
636 | std::unique_ptr<struct objfile> objfile_holder |
637 | (symbol_file_add_from_bfd (abfd.get (), filename.get (), | |
638 | 0, NULL, 0, NULL)); | |
639 | objfile = objfile_holder.get (); | |
bb2ec1b3 | 640 | |
83d3415e JK |
641 | func_sym = lookup_global_symbol_from_objfile (objfile, |
642 | GCC_FE_WRAPPER_FUNCTION, | |
d12307c1 | 643 | VAR_DOMAIN).symbol; |
83d3415e JK |
644 | if (func_sym == NULL) |
645 | error (_("Cannot find function \"%s\" in compiled module \"%s\"."), | |
646 | GCC_FE_WRAPPER_FUNCTION, objfile_name (objfile)); | |
647 | func_type = SYMBOL_TYPE (func_sym); | |
648 | if (TYPE_CODE (func_type) != TYPE_CODE_FUNC) | |
649 | error (_("Invalid type code %d of function \"%s\" in compiled " | |
650 | "module \"%s\"."), | |
651 | TYPE_CODE (func_type), GCC_FE_WRAPPER_FUNCTION, | |
652 | objfile_name (objfile)); | |
653 | ||
654 | switch (scope) | |
655 | { | |
656 | case COMPILE_I_SIMPLE_SCOPE: | |
657 | expect_parameters = 1; | |
658 | expect_return_type = builtin_type (target_gdbarch ())->builtin_void; | |
659 | break; | |
660 | case COMPILE_I_RAW_SCOPE: | |
661 | expect_parameters = 0; | |
662 | expect_return_type = builtin_type (target_gdbarch ())->builtin_void; | |
663 | break; | |
36de76f9 JK |
664 | case COMPILE_I_PRINT_ADDRESS_SCOPE: |
665 | case COMPILE_I_PRINT_VALUE_SCOPE: | |
666 | expect_parameters = 2; | |
667 | expect_return_type = builtin_type (target_gdbarch ())->builtin_void; | |
668 | break; | |
83d3415e JK |
669 | default: |
670 | internal_error (__FILE__, __LINE__, _("invalid scope %d"), scope); | |
671 | } | |
672 | if (TYPE_NFIELDS (func_type) != expect_parameters) | |
673 | error (_("Invalid %d parameters of function \"%s\" in compiled " | |
674 | "module \"%s\"."), | |
675 | TYPE_NFIELDS (func_type), GCC_FE_WRAPPER_FUNCTION, | |
676 | objfile_name (objfile)); | |
677 | if (!types_deeply_equal (expect_return_type, TYPE_TARGET_TYPE (func_type))) | |
678 | error (_("Invalid return type of function \"%s\" in compiled " | |
c9e0a7e3 TT |
679 | "module \"%s\"."), |
680 | GCC_FE_WRAPPER_FUNCTION, objfile_name (objfile)); | |
bb2ec1b3 TT |
681 | |
682 | /* The memory may be later needed | |
683 | by bfd_generic_get_relocated_section_contents | |
684 | called from default_symfile_relocate. */ | |
224c3ddb SM |
685 | symbol_table = (asymbol **) obstack_alloc (&objfile->objfile_obstack, |
686 | storage_needed); | |
192b62ce | 687 | number_of_symbols = bfd_canonicalize_symtab (abfd.get (), symbol_table); |
bb2ec1b3 TT |
688 | if (number_of_symbols < 0) |
689 | error (_("Cannot parse symbols of compiled module \"%s\": %s"), | |
c9e0a7e3 | 690 | filename.get (), bfd_errmsg (bfd_get_error ())); |
bb2ec1b3 TT |
691 | |
692 | missing_symbols = 0; | |
693 | for (symp = symbol_table; symp < symbol_table + number_of_symbols; symp++) | |
694 | { | |
695 | asymbol *sym = *symp; | |
696 | ||
697 | if (sym->flags != 0) | |
698 | continue; | |
bb2ec1b3 TT |
699 | sym->flags = BSF_GLOBAL; |
700 | sym->section = bfd_abs_section_ptr; | |
701 | if (strcmp (sym->name, "_GLOBAL_OFFSET_TABLE_") == 0) | |
702 | { | |
b0fd6b30 JK |
703 | if (compile_debug) |
704 | fprintf_unfiltered (gdb_stdlog, | |
705 | "ELF symbol \"%s\" relocated to zero\n", | |
706 | sym->name); | |
707 | ||
708 | /* It seems to be a GCC bug, with -mcmodel=large there should be no | |
709 | need for _GLOBAL_OFFSET_TABLE_. Together with -fPIE the data | |
710 | remain PC-relative even with _GLOBAL_OFFSET_TABLE_ as zero. */ | |
bb2ec1b3 TT |
711 | sym->value = 0; |
712 | continue; | |
713 | } | |
714 | bmsym = lookup_minimal_symbol (sym->name, NULL, NULL); | |
715 | switch (bmsym.minsym == NULL | |
716 | ? mst_unknown : MSYMBOL_TYPE (bmsym.minsym)) | |
717 | { | |
718 | case mst_text: | |
078a0207 KS |
719 | case mst_bss: |
720 | case mst_data: | |
bb2ec1b3 | 721 | sym->value = BMSYMBOL_VALUE_ADDRESS (bmsym); |
b0fd6b30 JK |
722 | if (compile_debug) |
723 | fprintf_unfiltered (gdb_stdlog, | |
724 | "ELF mst_text symbol \"%s\" relocated to %s\n", | |
725 | sym->name, | |
726 | paddress (target_gdbarch (), sym->value)); | |
bb2ec1b3 | 727 | break; |
e26efa40 JK |
728 | case mst_text_gnu_ifunc: |
729 | sym->value = gnu_ifunc_resolve_addr (target_gdbarch (), | |
730 | BMSYMBOL_VALUE_ADDRESS (bmsym)); | |
b0fd6b30 JK |
731 | if (compile_debug) |
732 | fprintf_unfiltered (gdb_stdlog, | |
733 | "ELF mst_text_gnu_ifunc symbol \"%s\" " | |
734 | "relocated to %s\n", | |
735 | sym->name, | |
736 | paddress (target_gdbarch (), sym->value)); | |
e26efa40 | 737 | break; |
bb2ec1b3 TT |
738 | default: |
739 | warning (_("Could not find symbol \"%s\" " | |
740 | "for compiled module \"%s\"."), | |
ee0c3293 | 741 | sym->name, filename.get ()); |
bb2ec1b3 TT |
742 | missing_symbols++; |
743 | } | |
744 | } | |
745 | if (missing_symbols) | |
746 | error (_("%ld symbols were missing, cannot continue."), missing_symbols); | |
747 | ||
192b62ce | 748 | bfd_map_over_sections (abfd.get (), copy_sections, symbol_table); |
bb2ec1b3 | 749 | |
83d3415e | 750 | regs_type = get_regs_type (func_sym, objfile); |
bb2ec1b3 TT |
751 | if (regs_type == NULL) |
752 | regs_addr = 0; | |
753 | else | |
754 | { | |
755 | /* Use read-only non-executable memory protection. */ | |
756 | regs_addr = gdbarch_infcall_mmap (target_gdbarch (), | |
757 | TYPE_LENGTH (regs_type), | |
758 | GDB_MMAP_PROT_READ); | |
759 | gdb_assert (regs_addr != 0); | |
c9e0a7e3 | 760 | setup_sections_data.munmap_list->add (regs_addr, TYPE_LENGTH (regs_type)); |
b6de3f96 | 761 | if (compile_debug) |
a4063588 | 762 | fprintf_unfiltered (gdb_stdlog, |
b6de3f96 JK |
763 | "allocated %s bytes at %s for registers\n", |
764 | paddress (target_gdbarch (), | |
765 | TYPE_LENGTH (regs_type)), | |
766 | paddress (target_gdbarch (), regs_addr)); | |
bb2ec1b3 TT |
767 | store_regs (regs_type, regs_addr); |
768 | } | |
769 | ||
36de76f9 JK |
770 | if (scope == COMPILE_I_PRINT_ADDRESS_SCOPE |
771 | || scope == COMPILE_I_PRINT_VALUE_SCOPE) | |
772 | { | |
773 | out_value_type = get_out_value_type (func_sym, objfile, scope); | |
774 | if (out_value_type == NULL) | |
c9e0a7e3 | 775 | return NULL; |
36de76f9 JK |
776 | check_typedef (out_value_type); |
777 | out_value_addr = gdbarch_infcall_mmap (target_gdbarch (), | |
778 | TYPE_LENGTH (out_value_type), | |
779 | (GDB_MMAP_PROT_READ | |
780 | | GDB_MMAP_PROT_WRITE)); | |
781 | gdb_assert (out_value_addr != 0); | |
c9e0a7e3 TT |
782 | setup_sections_data.munmap_list->add (out_value_addr, |
783 | TYPE_LENGTH (out_value_type)); | |
36de76f9 | 784 | if (compile_debug) |
a4063588 | 785 | fprintf_unfiltered (gdb_stdlog, |
36de76f9 JK |
786 | "allocated %s bytes at %s for printed value\n", |
787 | paddress (target_gdbarch (), | |
788 | TYPE_LENGTH (out_value_type)), | |
789 | paddress (target_gdbarch (), out_value_addr)); | |
790 | } | |
791 | ||
8d749320 | 792 | retval = XNEW (struct compile_module); |
ed2b3126 | 793 | retval->objfile = objfile_holder.release (); |
aaee65ae | 794 | retval->source_file = xstrdup (file_names.source_file ()); |
83d3415e | 795 | retval->func_sym = func_sym; |
bb2ec1b3 | 796 | retval->regs_addr = regs_addr; |
5c65b58a JK |
797 | retval->scope = scope; |
798 | retval->scope_data = scope_data; | |
36de76f9 JK |
799 | retval->out_value_type = out_value_type; |
800 | retval->out_value_addr = out_value_addr; | |
c9e0a7e3 | 801 | retval->munmap_list_head = setup_sections_data.munmap_list.release (); |
7f361056 | 802 | |
bb2ec1b3 TT |
803 | return retval; |
804 | } |