1 /* Load module for 'compile' command.
3 Copyright (C) 2014-2019 Free Software Foundation, Inc.
5 This file is part of GDB.
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.
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.
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/>. */
21 #include "compile-object-load.h"
22 #include "compile-internal.h"
26 #include "readline/tilde.h"
31 #include "gdbthread.h"
34 #include "arch-utils.h"
37 /* Add inferior mmap memory range ADDR..ADDR+SIZE (exclusive) to the
41 munmap_list::add (CORE_ADDR addr, CORE_ADDR size)
43 struct munmap_item item = { addr, size };
44 items.push_back (item);
47 /* Destroy an munmap_list. */
49 munmap_list::~munmap_list ()
51 for (auto &item : items)
55 gdbarch_infcall_munmap (target_gdbarch (), item.addr, item.size);
57 catch (const gdb_exception_error &ex)
59 /* There's not much the user can do, so just ignore
65 /* Helper data for setup_sections. */
67 struct setup_sections_data
69 /* Size of all recent sections with matching LAST_PROT. */
72 /* First section matching LAST_PROT. */
73 asection *last_section_first;
75 /* Memory protection like the prot parameter of gdbarch_infcall_mmap. */
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;
82 /* List of inferior mmap ranges where setup_sections should add its
84 std::unique_ptr<struct munmap_list> munmap_list;
87 /* Place all ABFD sections next to each other obeying all constraints. */
90 setup_sections (bfd *abfd, asection *sect, void *data_voidp)
92 struct setup_sections_data *data = (struct setup_sections_data *) data_voidp;
98 /* It is required by later bfd_get_relocated_section_contents. */
99 if (sect->output_section == NULL)
100 sect->output_section = sect;
102 if ((bfd_get_section_flags (abfd, sect) & SEC_ALLOC) == 0)
105 /* Make the memory always readable. */
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;
113 fprintf_unfiltered (gdb_stdlog,
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)),
125 || (data->last_prot != prot && bfd_get_section_size (sect) != 0))
130 if (data->last_size != 0)
132 addr = gdbarch_infcall_mmap (target_gdbarch (), data->last_size,
134 data->munmap_list->add (addr, data->last_size);
136 fprintf_unfiltered (gdb_stdlog,
137 "allocated %s bytes at %s prot %u\n",
138 paddress (target_gdbarch (), data->last_size),
139 paddress (target_gdbarch (), addr),
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));
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));
158 data->last_section_first = sect;
159 data->last_prot = prot;
160 data->last_max_alignment = 1;
166 alignment = ((CORE_ADDR) 1) << bfd_get_section_alignment (abfd, sect);
167 data->last_max_alignment = std::max (data->last_max_alignment, alignment);
169 data->last_size = (data->last_size + alignment - 1) & -alignment;
171 bfd_set_section_vma (abfd, sect, data->last_size);
173 data->last_size += bfd_get_section_size (sect);
174 data->last_size = (data->last_size + alignment - 1) & -alignment;
177 /* Helper for link_callbacks callbacks vector. */
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)
184 bfd *abfd = link_info->input_bfds;
186 if (link_info->allow_multiple_definition)
188 warning (_("Compiled module \"%s\": multiple symbol definitions: %s"),
189 bfd_get_filename (abfd), h->root.string);
192 /* Helper for link_callbacks callbacks vector. */
195 link_callbacks_warning (struct bfd_link_info *link_info, const char *xwarning,
196 const char *symbol, bfd *abfd, asection *section,
199 warning (_("Compiled module \"%s\" section \"%s\": warning: %s"),
200 bfd_get_filename (abfd), bfd_get_section_name (abfd, section),
204 /* Helper for link_callbacks callbacks vector. */
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)
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));
216 /* Helper for link_callbacks callbacks vector. */
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,
227 /* Helper for link_callbacks callbacks vector. */
230 link_callbacks_reloc_dangerous (struct bfd_link_info *link_info,
231 const char *message, bfd *abfd,
232 asection *section, bfd_vma address)
234 warning (_("Compiled module \"%s\" section \"%s\": dangerous "
236 bfd_get_filename (abfd), bfd_get_section_name (abfd, section),
240 /* Helper for link_callbacks callbacks vector. */
243 link_callbacks_unattached_reloc (struct bfd_link_info *link_info,
244 const char *name, bfd *abfd, asection *section,
247 warning (_("Compiled module \"%s\" section \"%s\": unattached "
249 bfd_get_filename (abfd), bfd_get_section_name (abfd, section),
253 /* Helper for link_callbacks callbacks vector. */
255 static void link_callbacks_einfo (const char *fmt, ...)
256 ATTRIBUTE_PRINTF (1, 2);
259 link_callbacks_einfo (const char *fmt, ...)
264 std::string str = string_vprintf (fmt, ap);
267 warning (_("Compile module: warning: %s"), str.c_str ());
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. */
274 static const struct bfd_link_callbacks link_callbacks =
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 */
287 link_callbacks_einfo, /* einfo */
290 NULL, /* override_segment_assignment */
293 struct link_hash_table_cleanup_data
295 explicit link_hash_table_cleanup_data (bfd *abfd_)
297 link_next (abfd->link.next)
301 ~link_hash_table_cleanup_data ()
303 if (abfd->is_linker_output)
304 (*abfd->link.hash->hash_table_free) (abfd);
305 abfd->link.next = link_next;
308 DISABLE_COPY_AND_ASSIGN (link_hash_table_cleanup_data);
316 /* Relocate and store into inferior memory each section SECT of ABFD. */
319 copy_sections (bfd *abfd, asection *sect, void *data)
321 asymbol **symbol_table = (asymbol **) data;
322 bfd_byte *sect_data_got;
323 struct bfd_link_info link_info;
324 struct bfd_link_order link_order;
325 CORE_ADDR inferior_addr;
327 if ((bfd_get_section_flags (abfd, sect) & (SEC_ALLOC | SEC_LOAD))
328 != (SEC_ALLOC | SEC_LOAD))
331 if (bfd_get_section_size (sect) == 0)
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;
341 struct link_hash_table_cleanup_data cleanup_data (abfd);
343 abfd->link.next = NULL;
344 link_info.hash = bfd_link_hash_table_create (abfd);
346 link_info.callbacks = &link_callbacks;
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;
355 gdb::unique_xmalloc_ptr<gdb_byte> sect_data
356 ((bfd_byte *) xmalloc (bfd_get_section_size (sect)));
358 sect_data_got = bfd_get_relocated_section_contents (abfd, &link_info,
361 FALSE, symbol_table);
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 ()));
367 gdb_assert (sect_data_got == sect_data.get ());
369 inferior_addr = bfd_get_section_vma (abfd, sect);
370 if (0 != target_write_memory (inferior_addr, sect_data.get (),
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)));
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. */
393 get_out_value_type (struct symbol *func_sym, struct objfile *objfile,
394 enum compile_i_scope_types scope)
396 struct symbol *gdb_ptr_type_sym;
397 /* Initialize it just to avoid a GCC false warning. */
398 struct symbol *gdb_val_sym = NULL;
399 struct type *gdb_ptr_type, *gdb_type_from_ptr, *gdb_type, *retval;
400 /* Initialize it just to avoid a GCC false warning. */
401 const struct block *block = NULL;
402 const struct blockvector *bv;
406 bv = SYMTAB_BLOCKVECTOR (func_sym->owner.symtab);
407 nblocks = BLOCKVECTOR_NBLOCKS (bv);
409 gdb_ptr_type_sym = NULL;
410 for (block_loop = 0; block_loop < nblocks; block_loop++)
412 struct symbol *function = NULL;
413 const struct block *function_block;
415 block = BLOCKVECTOR_BLOCK (bv, block_loop);
416 if (BLOCK_FUNCTION (block) != NULL)
418 gdb_val_sym = block_lookup_symbol (block,
420 symbol_name_match_type::SEARCH_NAME,
422 if (gdb_val_sym == NULL)
425 function_block = block;
426 while (function_block != BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK)
427 && function_block != BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK))
429 function_block = BLOCK_SUPERBLOCK (function_block);
430 function = BLOCK_FUNCTION (function_block);
431 if (function != NULL)
435 && (BLOCK_SUPERBLOCK (function_block)
436 == BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK))
437 && (strcmp_iw (SYMBOL_LINKAGE_NAME (function),
438 GCC_FE_WRAPPER_FUNCTION)
442 if (block_loop == nblocks)
443 error (_("No \"%s\" symbol found"), COMPILE_I_EXPR_PTR_TYPE);
445 gdb_type = SYMBOL_TYPE (gdb_val_sym);
446 gdb_type = check_typedef (gdb_type);
448 gdb_ptr_type_sym = block_lookup_symbol (block, COMPILE_I_EXPR_PTR_TYPE,
449 symbol_name_match_type::SEARCH_NAME,
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);
454 gdb_ptr_type = check_typedef (gdb_ptr_type);
455 if (TYPE_CODE (gdb_ptr_type) != TYPE_CODE_PTR)
456 error (_("Type of \"%s\" is not a pointer"), COMPILE_I_EXPR_PTR_TYPE);
457 gdb_type_from_ptr = check_typedef (TYPE_TARGET_TYPE (gdb_ptr_type));
459 if (types_deeply_equal (gdb_type, gdb_type_from_ptr))
461 if (scope != COMPILE_I_PRINT_ADDRESS_SCOPE)
462 error (_("Expected address scope in compiled module \"%s\"."),
463 objfile_name (objfile));
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));
473 retval = gdb_type_from_ptr;
474 switch (TYPE_CODE (gdb_type_from_ptr))
476 case TYPE_CODE_ARRAY:
477 gdb_type_from_ptr = TYPE_TARGET_TYPE (gdb_type_from_ptr);
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));
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)
498 /* Fetch the type of first parameter of FUNC_SYM.
499 Return NULL if FUNC_SYM has no parameters. Throw an error otherwise. */
502 get_regs_type (struct symbol *func_sym, struct objfile *objfile)
504 struct type *func_type = SYMBOL_TYPE (func_sym);
505 struct type *regsp_type, *regs_type;
507 /* No register parameter present. */
508 if (TYPE_NFIELDS (func_type) == 0)
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));
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));
528 /* Store all inferior registers required by REGS_TYPE to inferior memory
529 starting at inferior address REGS_BASE. */
532 store_regs (struct type *regs_type, CORE_ADDR regs_base)
534 struct gdbarch *gdbarch = target_gdbarch ();
537 for (fieldno = 0; fieldno < TYPE_NFIELDS (regs_type); fieldno++)
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);
543 struct type *reg_type = check_typedef (TYPE_FIELD_TYPE (regs_type,
545 ULONGEST reg_size = TYPE_LENGTH (reg_type);
547 struct value *regval;
548 CORE_ADDR inferior_addr;
550 if (strcmp (reg_name, COMPILE_I_SIMPLE_REGISTER_DUMMY) == 0)
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;
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));
563 regnum = compile_register_name_demangle (gdbarch, reg_name);
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);
571 inferior_addr = regs_base + reg_offset;
572 if (0 != target_write_memory (inferior_addr, value_contents (regval),
574 error (_("Cannot write register \"%s\" to inferior memory at %s."),
575 reg_name, paddress (gdbarch, inferior_addr));
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. */
585 struct compile_module *
586 compile_object_load (const compile_file_names &file_names,
587 enum compile_i_scope_types scope, void *scope_data)
589 struct setup_sections_data setup_sections_data;
590 CORE_ADDR regs_addr, out_value_addr = 0;
591 struct symbol *func_sym;
592 struct type *func_type;
593 struct bound_minimal_symbol bmsym;
595 asymbol **symbol_table, **symp;
596 long number_of_symbols, missing_symbols;
597 struct compile_module *retval;
598 struct type *regs_type, *out_value_type = NULL;
600 struct objfile *objfile;
601 int expect_parameters;
602 struct type *expect_return_type;
604 gdb::unique_xmalloc_ptr<char> filename
605 (tilde_expand (file_names.object_file ()));
607 gdb_bfd_ref_ptr abfd (gdb_bfd_open (filename.get (), gnutarget, -1));
609 error (_("\"%s\": could not open as compiled module: %s"),
610 filename.get (), bfd_errmsg (bfd_get_error ()));
612 if (!bfd_check_format_matches (abfd.get (), bfd_object, &matching))
613 error (_("\"%s\": not in loadable format: %s"),
615 gdb_bfd_errmsg (bfd_get_error (), matching).c_str ());
617 if ((bfd_get_file_flags (abfd.get ()) & (EXEC_P | DYNAMIC)) != 0)
618 error (_("\"%s\": not in object format."), filename.get ());
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;
624 setup_sections_data.munmap_list.reset (new struct munmap_list);
626 bfd_map_over_sections (abfd.get (), setup_sections, &setup_sections_data);
627 setup_sections (abfd.get (), NULL, &setup_sections_data);
629 storage_needed = bfd_get_symtab_upper_bound (abfd.get ());
630 if (storage_needed < 0)
631 error (_("Cannot read symbols of compiled module \"%s\": %s"),
632 filename.get (), bfd_errmsg (bfd_get_error ()));
634 /* SYMFILE_VERBOSE is not passed even if FROM_TTY, user is not interested in
635 "Reading symbols from ..." message for automatically generated file. */
636 std::unique_ptr<struct objfile> objfile_holder
637 (symbol_file_add_from_bfd (abfd.get (), filename.get (),
639 objfile = objfile_holder.get ();
641 func_sym = lookup_global_symbol_from_objfile (objfile,
643 GCC_FE_WRAPPER_FUNCTION,
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 "
652 TYPE_CODE (func_type), GCC_FE_WRAPPER_FUNCTION,
653 objfile_name (objfile));
657 case COMPILE_I_SIMPLE_SCOPE:
658 expect_parameters = 1;
659 expect_return_type = builtin_type (target_gdbarch ())->builtin_void;
661 case COMPILE_I_RAW_SCOPE:
662 expect_parameters = 0;
663 expect_return_type = builtin_type (target_gdbarch ())->builtin_void;
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;
671 internal_error (__FILE__, __LINE__, _("invalid scope %d"), scope);
673 if (TYPE_NFIELDS (func_type) != expect_parameters)
674 error (_("Invalid %d parameters of function \"%s\" in compiled "
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 "
681 GCC_FE_WRAPPER_FUNCTION, objfile_name (objfile));
683 /* The memory may be later needed
684 by bfd_generic_get_relocated_section_contents
685 called from default_symfile_relocate. */
686 symbol_table = (asymbol **) obstack_alloc (&objfile->objfile_obstack,
688 number_of_symbols = bfd_canonicalize_symtab (abfd.get (), symbol_table);
689 if (number_of_symbols < 0)
690 error (_("Cannot parse symbols of compiled module \"%s\": %s"),
691 filename.get (), bfd_errmsg (bfd_get_error ()));
694 for (symp = symbol_table; symp < symbol_table + number_of_symbols; symp++)
696 asymbol *sym = *symp;
700 sym->flags = BSF_GLOBAL;
701 sym->section = bfd_abs_section_ptr;
702 if (strcmp (sym->name, "_GLOBAL_OFFSET_TABLE_") == 0)
705 fprintf_unfiltered (gdb_stdlog,
706 "ELF symbol \"%s\" relocated to zero\n",
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. */
715 bmsym = lookup_minimal_symbol (sym->name, NULL, NULL);
716 switch (bmsym.minsym == NULL
717 ? mst_unknown : MSYMBOL_TYPE (bmsym.minsym))
722 sym->value = BMSYMBOL_VALUE_ADDRESS (bmsym);
724 fprintf_unfiltered (gdb_stdlog,
725 "ELF mst_text symbol \"%s\" relocated to %s\n",
727 paddress (target_gdbarch (), sym->value));
729 case mst_text_gnu_ifunc:
730 sym->value = gnu_ifunc_resolve_addr (target_gdbarch (),
731 BMSYMBOL_VALUE_ADDRESS (bmsym));
733 fprintf_unfiltered (gdb_stdlog,
734 "ELF mst_text_gnu_ifunc symbol \"%s\" "
737 paddress (target_gdbarch (), sym->value));
740 warning (_("Could not find symbol \"%s\" "
741 "for compiled module \"%s\"."),
742 sym->name, filename.get ());
747 error (_("%ld symbols were missing, cannot continue."), missing_symbols);
749 bfd_map_over_sections (abfd.get (), copy_sections, symbol_table);
751 regs_type = get_regs_type (func_sym, objfile);
752 if (regs_type == NULL)
756 /* Use read-only non-executable memory protection. */
757 regs_addr = gdbarch_infcall_mmap (target_gdbarch (),
758 TYPE_LENGTH (regs_type),
760 gdb_assert (regs_addr != 0);
761 setup_sections_data.munmap_list->add (regs_addr, TYPE_LENGTH (regs_type));
763 fprintf_unfiltered (gdb_stdlog,
764 "allocated %s bytes at %s for registers\n",
765 paddress (target_gdbarch (),
766 TYPE_LENGTH (regs_type)),
767 paddress (target_gdbarch (), regs_addr));
768 store_regs (regs_type, regs_addr);
771 if (scope == COMPILE_I_PRINT_ADDRESS_SCOPE
772 || scope == COMPILE_I_PRINT_VALUE_SCOPE)
774 out_value_type = get_out_value_type (func_sym, objfile, scope);
775 if (out_value_type == NULL)
777 check_typedef (out_value_type);
778 out_value_addr = gdbarch_infcall_mmap (target_gdbarch (),
779 TYPE_LENGTH (out_value_type),
781 | GDB_MMAP_PROT_WRITE));
782 gdb_assert (out_value_addr != 0);
783 setup_sections_data.munmap_list->add (out_value_addr,
784 TYPE_LENGTH (out_value_type));
786 fprintf_unfiltered (gdb_stdlog,
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));
793 retval = XNEW (struct compile_module);
794 retval->objfile = objfile_holder.release ();
795 retval->source_file = xstrdup (file_names.source_file ());
796 retval->func_sym = func_sym;
797 retval->regs_addr = regs_addr;
798 retval->scope = scope;
799 retval->scope_data = scope_data;
800 retval->out_value_type = out_value_type;
801 retval->out_value_addr = out_value_addr;
802 retval->munmap_list_head = setup_sections_data.munmap_list.release ();