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- /* Generic symbol file reading for the GNU debugger, GDB.
- Copyright (C) 1990-2022 Free Software Foundation, Inc.
- Contributed by Cygnus Support, using pieces from other GDB modules.
- This file is part of GDB.
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 3 of the License, or
- (at your option) any later version.
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>. */
- #include "defs.h"
- #include "arch-utils.h"
- #include "bfdlink.h"
- #include "symtab.h"
- #include "gdbtypes.h"
- #include "gdbcore.h"
- #include "frame.h"
- #include "target.h"
- #include "value.h"
- #include "symfile.h"
- #include "objfiles.h"
- #include "source.h"
- #include "gdbcmd.h"
- #include "breakpoint.h"
- #include "language.h"
- #include "complaints.h"
- #include "demangle.h"
- #include "inferior.h"
- #include "regcache.h"
- #include "filenames.h" /* for DOSish file names */
- #include "gdb-stabs.h"
- #include "gdbsupport/gdb_obstack.h"
- #include "completer.h"
- #include "bcache.h"
- #include "hashtab.h"
- #include "readline/tilde.h"
- #include "block.h"
- #include "observable.h"
- #include "exec.h"
- #include "parser-defs.h"
- #include "varobj.h"
- #include "elf-bfd.h"
- #include "solib.h"
- #include "remote.h"
- #include "stack.h"
- #include "gdb_bfd.h"
- #include "cli/cli-utils.h"
- #include "gdbsupport/byte-vector.h"
- #include "gdbsupport/pathstuff.h"
- #include "gdbsupport/selftest.h"
- #include "cli/cli-style.h"
- #include "gdbsupport/forward-scope-exit.h"
- #include "gdbsupport/buildargv.h"
- #include <sys/types.h>
- #include <fcntl.h>
- #include <sys/stat.h>
- #include <ctype.h>
- #include <chrono>
- #include <algorithm>
- int (*deprecated_ui_load_progress_hook) (const char *section,
- unsigned long num);
- void (*deprecated_show_load_progress) (const char *section,
- unsigned long section_sent,
- unsigned long section_size,
- unsigned long total_sent,
- unsigned long total_size);
- void (*deprecated_pre_add_symbol_hook) (const char *);
- void (*deprecated_post_add_symbol_hook) (void);
- using clear_symtab_users_cleanup
- = FORWARD_SCOPE_EXIT (clear_symtab_users);
- /* Global variables owned by this file. */
- /* See symfile.h. */
- int readnow_symbol_files;
- /* See symfile.h. */
- int readnever_symbol_files;
- /* Functions this file defines. */
- static void symbol_file_add_main_1 (const char *args, symfile_add_flags add_flags,
- objfile_flags flags, CORE_ADDR reloff);
- static const struct sym_fns *find_sym_fns (bfd *);
- static void overlay_invalidate_all (void);
- static void simple_free_overlay_table (void);
- static void read_target_long_array (CORE_ADDR, unsigned int *, int, int,
- enum bfd_endian);
- static int simple_read_overlay_table (void);
- static int simple_overlay_update_1 (struct obj_section *);
- static void symfile_find_segment_sections (struct objfile *objfile);
- /* List of all available sym_fns. On gdb startup, each object file reader
- calls add_symtab_fns() to register information on each format it is
- prepared to read. */
- struct registered_sym_fns
- {
- registered_sym_fns (bfd_flavour sym_flavour_, const struct sym_fns *sym_fns_)
- : sym_flavour (sym_flavour_), sym_fns (sym_fns_)
- {}
- /* BFD flavour that we handle. */
- enum bfd_flavour sym_flavour;
- /* The "vtable" of symbol functions. */
- const struct sym_fns *sym_fns;
- };
- static std::vector<registered_sym_fns> symtab_fns;
- /* Values for "set print symbol-loading". */
- const char print_symbol_loading_off[] = "off";
- const char print_symbol_loading_brief[] = "brief";
- const char print_symbol_loading_full[] = "full";
- static const char *print_symbol_loading_enums[] =
- {
- print_symbol_loading_off,
- print_symbol_loading_brief,
- print_symbol_loading_full,
- NULL
- };
- static const char *print_symbol_loading = print_symbol_loading_full;
- /* See symfile.h. */
- bool auto_solib_add = true;
- /* Return non-zero if symbol-loading messages should be printed.
- FROM_TTY is the standard from_tty argument to gdb commands.
- If EXEC is non-zero the messages are for the executable.
- Otherwise, messages are for shared libraries.
- If FULL is non-zero then the caller is printing a detailed message.
- E.g., the message includes the shared library name.
- Otherwise, the caller is printing a brief "summary" message. */
- int
- print_symbol_loading_p (int from_tty, int exec, int full)
- {
- if (!from_tty && !info_verbose)
- return 0;
- if (exec)
- {
- /* We don't check FULL for executables, there are few such
- messages, therefore brief == full. */
- return print_symbol_loading != print_symbol_loading_off;
- }
- if (full)
- return print_symbol_loading == print_symbol_loading_full;
- return print_symbol_loading == print_symbol_loading_brief;
- }
- /* True if we are reading a symbol table. */
- int currently_reading_symtab = 0;
- /* Increment currently_reading_symtab and return a cleanup that can be
- used to decrement it. */
- scoped_restore_tmpl<int>
- increment_reading_symtab (void)
- {
- gdb_assert (currently_reading_symtab >= 0);
- return make_scoped_restore (¤tly_reading_symtab,
- currently_reading_symtab + 1);
- }
- /* Remember the lowest-addressed loadable section we've seen.
- In case of equal vmas, the section with the largest size becomes the
- lowest-addressed loadable section.
- If the vmas and sizes are equal, the last section is considered the
- lowest-addressed loadable section. */
- static void
- find_lowest_section (asection *sect, asection **lowest)
- {
- if (0 == (bfd_section_flags (sect) & (SEC_ALLOC | SEC_LOAD)))
- return;
- if (!*lowest)
- *lowest = sect; /* First loadable section */
- else if (bfd_section_vma (*lowest) > bfd_section_vma (sect))
- *lowest = sect; /* A lower loadable section */
- else if (bfd_section_vma (*lowest) == bfd_section_vma (sect)
- && (bfd_section_size (*lowest) <= bfd_section_size (sect)))
- *lowest = sect;
- }
- /* Build (allocate and populate) a section_addr_info struct from
- an existing section table. */
- section_addr_info
- build_section_addr_info_from_section_table (const target_section_table &table)
- {
- section_addr_info sap;
- for (const target_section &stp : table)
- {
- struct bfd_section *asect = stp.the_bfd_section;
- bfd *abfd = asect->owner;
- if (bfd_section_flags (asect) & (SEC_ALLOC | SEC_LOAD)
- && sap.size () < table.size ())
- sap.emplace_back (stp.addr,
- bfd_section_name (asect),
- gdb_bfd_section_index (abfd, asect));
- }
- return sap;
- }
- /* Create a section_addr_info from section offsets in ABFD. */
- static section_addr_info
- build_section_addr_info_from_bfd (bfd *abfd)
- {
- struct bfd_section *sec;
- section_addr_info sap;
- for (sec = abfd->sections; sec != NULL; sec = sec->next)
- if (bfd_section_flags (sec) & (SEC_ALLOC | SEC_LOAD))
- sap.emplace_back (bfd_section_vma (sec),
- bfd_section_name (sec),
- gdb_bfd_section_index (abfd, sec));
- return sap;
- }
- /* Create a section_addr_info from section offsets in OBJFILE. */
- section_addr_info
- build_section_addr_info_from_objfile (const struct objfile *objfile)
- {
- int i;
- /* Before reread_symbols gets rewritten it is not safe to call:
- gdb_assert (objfile->num_sections == bfd_count_sections (objfile->obfd));
- */
- section_addr_info sap = build_section_addr_info_from_bfd (objfile->obfd);
- for (i = 0; i < sap.size (); i++)
- {
- int sectindex = sap[i].sectindex;
- sap[i].addr += objfile->section_offsets[sectindex];
- }
- return sap;
- }
- /* Initialize OBJFILE's sect_index_* members. */
- static void
- init_objfile_sect_indices (struct objfile *objfile)
- {
- asection *sect;
- int i;
- sect = bfd_get_section_by_name (objfile->obfd, ".text");
- if (sect)
- objfile->sect_index_text = sect->index;
- sect = bfd_get_section_by_name (objfile->obfd, ".data");
- if (sect)
- objfile->sect_index_data = sect->index;
- sect = bfd_get_section_by_name (objfile->obfd, ".bss");
- if (sect)
- objfile->sect_index_bss = sect->index;
- sect = bfd_get_section_by_name (objfile->obfd, ".rodata");
- if (sect)
- objfile->sect_index_rodata = sect->index;
- /* This is where things get really weird... We MUST have valid
- indices for the various sect_index_* members or gdb will abort.
- So if for example, there is no ".text" section, we have to
- accomodate that. First, check for a file with the standard
- one or two segments. */
- symfile_find_segment_sections (objfile);
- /* Except when explicitly adding symbol files at some address,
- section_offsets contains nothing but zeros, so it doesn't matter
- which slot in section_offsets the individual sect_index_* members
- index into. So if they are all zero, it is safe to just point
- all the currently uninitialized indices to the first slot. But
- beware: if this is the main executable, it may be relocated
- later, e.g. by the remote qOffsets packet, and then this will
- be wrong! That's why we try segments first. */
- for (i = 0; i < objfile->section_offsets.size (); i++)
- {
- if (objfile->section_offsets[i] != 0)
- {
- break;
- }
- }
- if (i == objfile->section_offsets.size ())
- {
- if (objfile->sect_index_text == -1)
- objfile->sect_index_text = 0;
- if (objfile->sect_index_data == -1)
- objfile->sect_index_data = 0;
- if (objfile->sect_index_bss == -1)
- objfile->sect_index_bss = 0;
- if (objfile->sect_index_rodata == -1)
- objfile->sect_index_rodata = 0;
- }
- }
- /* Find a unique offset to use for loadable section SECT if
- the user did not provide an offset. */
- static void
- place_section (bfd *abfd, asection *sect, section_offsets &offsets,
- CORE_ADDR &lowest)
- {
- CORE_ADDR start_addr;
- int done;
- ULONGEST align = ((ULONGEST) 1) << bfd_section_alignment (sect);
- /* We are only interested in allocated sections. */
- if ((bfd_section_flags (sect) & SEC_ALLOC) == 0)
- return;
- /* If the user specified an offset, honor it. */
- if (offsets[gdb_bfd_section_index (abfd, sect)] != 0)
- return;
- /* Otherwise, let's try to find a place for the section. */
- start_addr = (lowest + align - 1) & -align;
- do {
- asection *cur_sec;
- done = 1;
- for (cur_sec = abfd->sections; cur_sec != NULL; cur_sec = cur_sec->next)
- {
- int indx = cur_sec->index;
- /* We don't need to compare against ourself. */
- if (cur_sec == sect)
- continue;
- /* We can only conflict with allocated sections. */
- if ((bfd_section_flags (cur_sec) & SEC_ALLOC) == 0)
- continue;
- /* If the section offset is 0, either the section has not been placed
- yet, or it was the lowest section placed (in which case LOWEST
- will be past its end). */
- if (offsets[indx] == 0)
- continue;
- /* If this section would overlap us, then we must move up. */
- if (start_addr + bfd_section_size (sect) > offsets[indx]
- && start_addr < offsets[indx] + bfd_section_size (cur_sec))
- {
- start_addr = offsets[indx] + bfd_section_size (cur_sec);
- start_addr = (start_addr + align - 1) & -align;
- done = 0;
- break;
- }
- /* Otherwise, we appear to be OK. So far. */
- }
- }
- while (!done);
- offsets[gdb_bfd_section_index (abfd, sect)] = start_addr;
- lowest = start_addr + bfd_section_size (sect);
- }
- /* Store section_addr_info as prepared (made relative and with SECTINDEX
- filled-in) by addr_info_make_relative into SECTION_OFFSETS. */
- void
- relative_addr_info_to_section_offsets (section_offsets §ion_offsets,
- const section_addr_info &addrs)
- {
- int i;
- section_offsets.assign (section_offsets.size (), 0);
- /* Now calculate offsets for section that were specified by the caller. */
- for (i = 0; i < addrs.size (); i++)
- {
- const struct other_sections *osp;
- osp = &addrs[i];
- if (osp->sectindex == -1)
- continue;
- /* Record all sections in offsets. */
- /* The section_offsets in the objfile are here filled in using
- the BFD index. */
- section_offsets[osp->sectindex] = osp->addr;
- }
- }
- /* Transform section name S for a name comparison. prelink can split section
- `.bss' into two sections `.dynbss' and `.bss' (in this order). Similarly
- prelink can split `.sbss' into `.sdynbss' and `.sbss'. Use virtual address
- of the new `.dynbss' (`.sdynbss') section as the adjacent new `.bss'
- (`.sbss') section has invalid (increased) virtual address. */
- static const char *
- addr_section_name (const char *s)
- {
- if (strcmp (s, ".dynbss") == 0)
- return ".bss";
- if (strcmp (s, ".sdynbss") == 0)
- return ".sbss";
- return s;
- }
- /* std::sort comparator for addrs_section_sort. Sort entries in
- ascending order by their (name, sectindex) pair. sectindex makes
- the sort by name stable. */
- static bool
- addrs_section_compar (const struct other_sections *a,
- const struct other_sections *b)
- {
- int retval;
- retval = strcmp (addr_section_name (a->name.c_str ()),
- addr_section_name (b->name.c_str ()));
- if (retval != 0)
- return retval < 0;
- return a->sectindex < b->sectindex;
- }
- /* Provide sorted array of pointers to sections of ADDRS. */
- static std::vector<const struct other_sections *>
- addrs_section_sort (const section_addr_info &addrs)
- {
- int i;
- std::vector<const struct other_sections *> array (addrs.size ());
- for (i = 0; i < addrs.size (); i++)
- array[i] = &addrs[i];
- std::sort (array.begin (), array.end (), addrs_section_compar);
- return array;
- }
- /* Relativize absolute addresses in ADDRS into offsets based on ABFD. Fill-in
- also SECTINDEXes specific to ABFD there. This function can be used to
- rebase ADDRS to start referencing different BFD than before. */
- void
- addr_info_make_relative (section_addr_info *addrs, bfd *abfd)
- {
- asection *lower_sect;
- CORE_ADDR lower_offset;
- int i;
- /* Find lowest loadable section to be used as starting point for
- contiguous sections. */
- lower_sect = NULL;
- for (asection *iter : gdb_bfd_sections (abfd))
- find_lowest_section (iter, &lower_sect);
- if (lower_sect == NULL)
- {
- warning (_("no loadable sections found in added symbol-file %s"),
- bfd_get_filename (abfd));
- lower_offset = 0;
- }
- else
- lower_offset = bfd_section_vma (lower_sect);
- /* Create ADDRS_TO_ABFD_ADDRS array to map the sections in ADDRS to sections
- in ABFD. Section names are not unique - there can be multiple sections of
- the same name. Also the sections of the same name do not have to be
- adjacent to each other. Some sections may be present only in one of the
- files. Even sections present in both files do not have to be in the same
- order.
- Use stable sort by name for the sections in both files. Then linearly
- scan both lists matching as most of the entries as possible. */
- std::vector<const struct other_sections *> addrs_sorted
- = addrs_section_sort (*addrs);
- section_addr_info abfd_addrs = build_section_addr_info_from_bfd (abfd);
- std::vector<const struct other_sections *> abfd_addrs_sorted
- = addrs_section_sort (abfd_addrs);
- /* Now create ADDRS_TO_ABFD_ADDRS from ADDRS_SORTED and
- ABFD_ADDRS_SORTED. */
- std::vector<const struct other_sections *>
- addrs_to_abfd_addrs (addrs->size (), nullptr);
- std::vector<const struct other_sections *>::iterator abfd_sorted_iter
- = abfd_addrs_sorted.begin ();
- for (const other_sections *sect : addrs_sorted)
- {
- const char *sect_name = addr_section_name (sect->name.c_str ());
- while (abfd_sorted_iter != abfd_addrs_sorted.end ()
- && strcmp (addr_section_name ((*abfd_sorted_iter)->name.c_str ()),
- sect_name) < 0)
- abfd_sorted_iter++;
- if (abfd_sorted_iter != abfd_addrs_sorted.end ()
- && strcmp (addr_section_name ((*abfd_sorted_iter)->name.c_str ()),
- sect_name) == 0)
- {
- int index_in_addrs;
- /* Make the found item directly addressable from ADDRS. */
- index_in_addrs = sect - addrs->data ();
- gdb_assert (addrs_to_abfd_addrs[index_in_addrs] == NULL);
- addrs_to_abfd_addrs[index_in_addrs] = *abfd_sorted_iter;
- /* Never use the same ABFD entry twice. */
- abfd_sorted_iter++;
- }
- }
- /* Calculate offsets for the loadable sections.
- FIXME! Sections must be in order of increasing loadable section
- so that contiguous sections can use the lower-offset!!!
- Adjust offsets if the segments are not contiguous.
- If the section is contiguous, its offset should be set to
- the offset of the highest loadable section lower than it
- (the loadable section directly below it in memory).
- this_offset = lower_offset = lower_addr - lower_orig_addr */
- for (i = 0; i < addrs->size (); i++)
- {
- const struct other_sections *sect = addrs_to_abfd_addrs[i];
- if (sect)
- {
- /* This is the index used by BFD. */
- (*addrs)[i].sectindex = sect->sectindex;
- if ((*addrs)[i].addr != 0)
- {
- (*addrs)[i].addr -= sect->addr;
- lower_offset = (*addrs)[i].addr;
- }
- else
- (*addrs)[i].addr = lower_offset;
- }
- else
- {
- /* addr_section_name transformation is not used for SECT_NAME. */
- const std::string §_name = (*addrs)[i].name;
- /* This section does not exist in ABFD, which is normally
- unexpected and we want to issue a warning.
- However, the ELF prelinker does create a few sections which are
- marked in the main executable as loadable (they are loaded in
- memory from the DYNAMIC segment) and yet are not present in
- separate debug info files. This is fine, and should not cause
- a warning. Shared libraries contain just the section
- ".gnu.liblist" but it is not marked as loadable there. There is
- no other way to identify them than by their name as the sections
- created by prelink have no special flags.
- For the sections `.bss' and `.sbss' see addr_section_name. */
- if (!(sect_name == ".gnu.liblist"
- || sect_name == ".gnu.conflict"
- || (sect_name == ".bss"
- && i > 0
- && (*addrs)[i - 1].name == ".dynbss"
- && addrs_to_abfd_addrs[i - 1] != NULL)
- || (sect_name == ".sbss"
- && i > 0
- && (*addrs)[i - 1].name == ".sdynbss"
- && addrs_to_abfd_addrs[i - 1] != NULL)))
- warning (_("section %s not found in %s"), sect_name.c_str (),
- bfd_get_filename (abfd));
- (*addrs)[i].addr = 0;
- (*addrs)[i].sectindex = -1;
- }
- }
- }
- /* Parse the user's idea of an offset for dynamic linking, into our idea
- of how to represent it for fast symbol reading. This is the default
- version of the sym_fns.sym_offsets function for symbol readers that
- don't need to do anything special. It allocates a section_offsets table
- for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */
- void
- default_symfile_offsets (struct objfile *objfile,
- const section_addr_info &addrs)
- {
- objfile->section_offsets.resize (gdb_bfd_count_sections (objfile->obfd));
- relative_addr_info_to_section_offsets (objfile->section_offsets, addrs);
- /* For relocatable files, all loadable sections will start at zero.
- The zero is meaningless, so try to pick arbitrary addresses such
- that no loadable sections overlap. This algorithm is quadratic,
- but the number of sections in a single object file is generally
- small. */
- if ((bfd_get_file_flags (objfile->obfd) & (EXEC_P | DYNAMIC)) == 0)
- {
- bfd *abfd = objfile->obfd;
- asection *cur_sec;
- for (cur_sec = abfd->sections; cur_sec != NULL; cur_sec = cur_sec->next)
- /* We do not expect this to happen; just skip this step if the
- relocatable file has a section with an assigned VMA. */
- if (bfd_section_vma (cur_sec) != 0)
- break;
- if (cur_sec == NULL)
- {
- section_offsets &offsets = objfile->section_offsets;
- /* Pick non-overlapping offsets for sections the user did not
- place explicitly. */
- CORE_ADDR lowest = 0;
- for (asection *sect : gdb_bfd_sections (objfile->obfd))
- place_section (objfile->obfd, sect, objfile->section_offsets,
- lowest);
- /* Correctly filling in the section offsets is not quite
- enough. Relocatable files have two properties that
- (most) shared objects do not:
- - Their debug information will contain relocations. Some
- shared libraries do also, but many do not, so this can not
- be assumed.
- - If there are multiple code sections they will be loaded
- at different relative addresses in memory than they are
- in the objfile, since all sections in the file will start
- at address zero.
- Because GDB has very limited ability to map from an
- address in debug info to the correct code section,
- it relies on adding SECT_OFF_TEXT to things which might be
- code. If we clear all the section offsets, and set the
- section VMAs instead, then symfile_relocate_debug_section
- will return meaningful debug information pointing at the
- correct sections.
- GDB has too many different data structures for section
- addresses - a bfd, objfile, and so_list all have section
- tables, as does exec_ops. Some of these could probably
- be eliminated. */
- for (cur_sec = abfd->sections; cur_sec != NULL;
- cur_sec = cur_sec->next)
- {
- if ((bfd_section_flags (cur_sec) & SEC_ALLOC) == 0)
- continue;
- bfd_set_section_vma (cur_sec, offsets[cur_sec->index]);
- exec_set_section_address (bfd_get_filename (abfd),
- cur_sec->index,
- offsets[cur_sec->index]);
- offsets[cur_sec->index] = 0;
- }
- }
- }
- /* Remember the bfd indexes for the .text, .data, .bss and
- .rodata sections. */
- init_objfile_sect_indices (objfile);
- }
- /* Divide the file into segments, which are individual relocatable units.
- This is the default version of the sym_fns.sym_segments function for
- symbol readers that do not have an explicit representation of segments.
- It assumes that object files do not have segments, and fully linked
- files have a single segment. */
- symfile_segment_data_up
- default_symfile_segments (bfd *abfd)
- {
- int num_sections, i;
- asection *sect;
- CORE_ADDR low, high;
- /* Relocatable files contain enough information to position each
- loadable section independently; they should not be relocated
- in segments. */
- if ((bfd_get_file_flags (abfd) & (EXEC_P | DYNAMIC)) == 0)
- return NULL;
- /* Make sure there is at least one loadable section in the file. */
- for (sect = abfd->sections; sect != NULL; sect = sect->next)
- {
- if ((bfd_section_flags (sect) & SEC_ALLOC) == 0)
- continue;
- break;
- }
- if (sect == NULL)
- return NULL;
- low = bfd_section_vma (sect);
- high = low + bfd_section_size (sect);
- symfile_segment_data_up data (new symfile_segment_data);
- num_sections = bfd_count_sections (abfd);
- /* All elements are initialized to 0 (map to no segment). */
- data->segment_info.resize (num_sections);
- for (i = 0, sect = abfd->sections; sect != NULL; i++, sect = sect->next)
- {
- CORE_ADDR vma;
- if ((bfd_section_flags (sect) & SEC_ALLOC) == 0)
- continue;
- vma = bfd_section_vma (sect);
- if (vma < low)
- low = vma;
- if (vma + bfd_section_size (sect) > high)
- high = vma + bfd_section_size (sect);
- data->segment_info[i] = 1;
- }
- data->segments.emplace_back (low, high - low);
- return data;
- }
- /* This is a convenience function to call sym_read for OBJFILE and
- possibly force the partial symbols to be read. */
- static void
- read_symbols (struct objfile *objfile, symfile_add_flags add_flags)
- {
- (*objfile->sf->sym_read) (objfile, add_flags);
- objfile->per_bfd->minsyms_read = true;
- /* find_separate_debug_file_in_section should be called only if there is
- single binary with no existing separate debug info file. */
- if (!objfile->has_partial_symbols ()
- && objfile->separate_debug_objfile == NULL
- && objfile->separate_debug_objfile_backlink == NULL)
- {
- gdb_bfd_ref_ptr abfd (find_separate_debug_file_in_section (objfile));
- if (abfd != NULL)
- {
- /* find_separate_debug_file_in_section uses the same filename for the
- virtual section-as-bfd like the bfd filename containing the
- section. Therefore use also non-canonical name form for the same
- file containing the section. */
- symbol_file_add_separate (abfd.get (),
- bfd_get_filename (abfd.get ()),
- add_flags | SYMFILE_NOT_FILENAME, objfile);
- }
- }
- if ((add_flags & SYMFILE_NO_READ) == 0)
- objfile->require_partial_symbols (false);
- }
- /* Initialize entry point information for this objfile. */
- static void
- init_entry_point_info (struct objfile *objfile)
- {
- struct entry_info *ei = &objfile->per_bfd->ei;
- if (ei->initialized)
- return;
- ei->initialized = 1;
- /* Save startup file's range of PC addresses to help blockframe.c
- decide where the bottom of the stack is. */
- if (bfd_get_file_flags (objfile->obfd) & EXEC_P)
- {
- /* Executable file -- record its entry point so we'll recognize
- the startup file because it contains the entry point. */
- ei->entry_point = bfd_get_start_address (objfile->obfd);
- ei->entry_point_p = 1;
- }
- else if (bfd_get_file_flags (objfile->obfd) & DYNAMIC
- && bfd_get_start_address (objfile->obfd) != 0)
- {
- /* Some shared libraries may have entry points set and be
- runnable. There's no clear way to indicate this, so just check
- for values other than zero. */
- ei->entry_point = bfd_get_start_address (objfile->obfd);
- ei->entry_point_p = 1;
- }
- else
- {
- /* Examination of non-executable.o files. Short-circuit this stuff. */
- ei->entry_point_p = 0;
- }
- if (ei->entry_point_p)
- {
- struct obj_section *osect;
- CORE_ADDR entry_point = ei->entry_point;
- int found;
- /* Make certain that the address points at real code, and not a
- function descriptor. */
- entry_point = gdbarch_convert_from_func_ptr_addr
- (objfile->arch (), entry_point, current_inferior ()->top_target ());
- /* Remove any ISA markers, so that this matches entries in the
- symbol table. */
- ei->entry_point
- = gdbarch_addr_bits_remove (objfile->arch (), entry_point);
- found = 0;
- ALL_OBJFILE_OSECTIONS (objfile, osect)
- {
- struct bfd_section *sect = osect->the_bfd_section;
- if (entry_point >= bfd_section_vma (sect)
- && entry_point < (bfd_section_vma (sect)
- + bfd_section_size (sect)))
- {
- ei->the_bfd_section_index
- = gdb_bfd_section_index (objfile->obfd, sect);
- found = 1;
- break;
- }
- }
- if (!found)
- ei->the_bfd_section_index = SECT_OFF_TEXT (objfile);
- }
- }
- /* Process a symbol file, as either the main file or as a dynamically
- loaded file.
- This function does not set the OBJFILE's entry-point info.
- OBJFILE is where the symbols are to be read from.
- ADDRS is the list of section load addresses. If the user has given
- an 'add-symbol-file' command, then this is the list of offsets and
- addresses he or she provided as arguments to the command; or, if
- we're handling a shared library, these are the actual addresses the
- sections are loaded at, according to the inferior's dynamic linker
- (as gleaned by GDB's shared library code). We convert each address
- into an offset from the section VMA's as it appears in the object
- file, and then call the file's sym_offsets function to convert this
- into a format-specific offset table --- a `section_offsets'.
- The sectindex field is used to control the ordering of sections
- with the same name. Upon return, it is updated to contain the
- corresponding BFD section index, or -1 if the section was not found.
- ADD_FLAGS encodes verbosity level, whether this is main symbol or
- an extra symbol file such as dynamically loaded code, and whether
- breakpoint reset should be deferred. */
- static void
- syms_from_objfile_1 (struct objfile *objfile,
- section_addr_info *addrs,
- symfile_add_flags add_flags)
- {
- section_addr_info local_addr;
- const int mainline = add_flags & SYMFILE_MAINLINE;
- objfile_set_sym_fns (objfile, find_sym_fns (objfile->obfd));
- objfile->qf.clear ();
- if (objfile->sf == NULL)
- {
- /* No symbols to load, but we still need to make sure
- that the section_offsets table is allocated. */
- int num_sections = gdb_bfd_count_sections (objfile->obfd);
- objfile->section_offsets.assign (num_sections, 0);
- return;
- }
- /* Make sure that partially constructed symbol tables will be cleaned up
- if an error occurs during symbol reading. */
- gdb::optional<clear_symtab_users_cleanup> defer_clear_users;
- objfile_up objfile_holder (objfile);
- /* If ADDRS is NULL, put together a dummy address list.
- We now establish the convention that an addr of zero means
- no load address was specified. */
- if (! addrs)
- addrs = &local_addr;
- if (mainline)
- {
- /* We will modify the main symbol table, make sure that all its users
- will be cleaned up if an error occurs during symbol reading. */
- defer_clear_users.emplace ((symfile_add_flag) 0);
- /* Since no error yet, throw away the old symbol table. */
- if (current_program_space->symfile_object_file != NULL)
- {
- current_program_space->symfile_object_file->unlink ();
- gdb_assert (current_program_space->symfile_object_file == NULL);
- }
- /* Currently we keep symbols from the add-symbol-file command.
- If the user wants to get rid of them, they should do "symbol-file"
- without arguments first. Not sure this is the best behavior
- (PR 2207). */
- (*objfile->sf->sym_new_init) (objfile);
- }
- /* Convert addr into an offset rather than an absolute address.
- We find the lowest address of a loaded segment in the objfile,
- and assume that <addr> is where that got loaded.
- We no longer warn if the lowest section is not a text segment (as
- happens for the PA64 port. */
- if (addrs->size () > 0)
- addr_info_make_relative (addrs, objfile->obfd);
- /* Initialize symbol reading routines for this objfile, allow complaints to
- appear for this new file, and record how verbose to be, then do the
- initial symbol reading for this file. */
- (*objfile->sf->sym_init) (objfile);
- clear_complaints ();
- (*objfile->sf->sym_offsets) (objfile, *addrs);
- read_symbols (objfile, add_flags);
- /* Discard cleanups as symbol reading was successful. */
- objfile_holder.release ();
- if (defer_clear_users)
- defer_clear_users->release ();
- }
- /* Same as syms_from_objfile_1, but also initializes the objfile
- entry-point info. */
- static void
- syms_from_objfile (struct objfile *objfile,
- section_addr_info *addrs,
- symfile_add_flags add_flags)
- {
- syms_from_objfile_1 (objfile, addrs, add_flags);
- init_entry_point_info (objfile);
- }
- /* Perform required actions after either reading in the initial
- symbols for a new objfile, or mapping in the symbols from a reusable
- objfile. ADD_FLAGS is a bitmask of enum symfile_add_flags. */
- static void
- finish_new_objfile (struct objfile *objfile, symfile_add_flags add_flags)
- {
- /* If this is the main symbol file we have to clean up all users of the
- old main symbol file. Otherwise it is sufficient to fixup all the
- breakpoints that may have been redefined by this symbol file. */
- if (add_flags & SYMFILE_MAINLINE)
- {
- /* OK, make it the "real" symbol file. */
- current_program_space->symfile_object_file = objfile;
- clear_symtab_users (add_flags);
- }
- else if ((add_flags & SYMFILE_DEFER_BP_RESET) == 0)
- {
- breakpoint_re_set ();
- }
- /* We're done reading the symbol file; finish off complaints. */
- clear_complaints ();
- }
- /* Process a symbol file, as either the main file or as a dynamically
- loaded file.
- ABFD is a BFD already open on the file, as from symfile_bfd_open.
- A new reference is acquired by this function.
- For NAME description see the objfile constructor.
- ADD_FLAGS encodes verbosity, whether this is main symbol file or
- extra, such as dynamically loaded code, and what to do with breakpoints.
- ADDRS is as described for syms_from_objfile_1, above.
- ADDRS is ignored when SYMFILE_MAINLINE bit is set in ADD_FLAGS.
- PARENT is the original objfile if ABFD is a separate debug info file.
- Otherwise PARENT is NULL.
- Upon success, returns a pointer to the objfile that was added.
- Upon failure, jumps back to command level (never returns). */
- static struct objfile *
- symbol_file_add_with_addrs (bfd *abfd, const char *name,
- symfile_add_flags add_flags,
- section_addr_info *addrs,
- objfile_flags flags, struct objfile *parent)
- {
- struct objfile *objfile;
- const int from_tty = add_flags & SYMFILE_VERBOSE;
- const int mainline = add_flags & SYMFILE_MAINLINE;
- const int always_confirm = add_flags & SYMFILE_ALWAYS_CONFIRM;
- const int should_print = (print_symbol_loading_p (from_tty, mainline, 1)
- && (readnow_symbol_files
- || (add_flags & SYMFILE_NO_READ) == 0));
- if (readnow_symbol_files)
- {
- flags |= OBJF_READNOW;
- add_flags &= ~SYMFILE_NO_READ;
- }
- else if (readnever_symbol_files
- || (parent != NULL && (parent->flags & OBJF_READNEVER)))
- {
- flags |= OBJF_READNEVER;
- add_flags |= SYMFILE_NO_READ;
- }
- if ((add_flags & SYMFILE_NOT_FILENAME) != 0)
- flags |= OBJF_NOT_FILENAME;
- /* Give user a chance to burp if ALWAYS_CONFIRM or we'd be
- interactively wiping out any existing symbols. */
- if (from_tty
- && (always_confirm
- || ((have_full_symbols () || have_partial_symbols ())
- && mainline))
- && !query (_("Load new symbol table from \"%s\"? "), name))
- error (_("Not confirmed."));
- if (mainline)
- flags |= OBJF_MAINLINE;
- objfile = objfile::make (abfd, name, flags, parent);
- /* We either created a new mapped symbol table, mapped an existing
- symbol table file which has not had initial symbol reading
- performed, or need to read an unmapped symbol table. */
- if (should_print)
- {
- if (deprecated_pre_add_symbol_hook)
- deprecated_pre_add_symbol_hook (name);
- else
- gdb_printf (_("Reading symbols from %ps...\n"),
- styled_string (file_name_style.style (), name));
- }
- syms_from_objfile (objfile, addrs, add_flags);
- /* We now have at least a partial symbol table. Check to see if the
- user requested that all symbols be read on initial access via either
- the gdb startup command line or on a per symbol file basis. Expand
- all partial symbol tables for this objfile if so. */
- if ((flags & OBJF_READNOW))
- {
- if (should_print)
- gdb_printf (_("Expanding full symbols from %ps...\n"),
- styled_string (file_name_style.style (), name));
- objfile->expand_all_symtabs ();
- }
- /* Note that we only print a message if we have no symbols and have
- no separate debug file. If there is a separate debug file which
- does not have symbols, we'll have emitted this message for that
- file, and so printing it twice is just redundant. */
- if (should_print && !objfile_has_symbols (objfile)
- && objfile->separate_debug_objfile == nullptr)
- gdb_printf (_("(No debugging symbols found in %ps)\n"),
- styled_string (file_name_style.style (), name));
- if (should_print)
- {
- if (deprecated_post_add_symbol_hook)
- deprecated_post_add_symbol_hook ();
- }
- /* We print some messages regardless of whether 'from_tty ||
- info_verbose' is true, so make sure they go out at the right
- time. */
- gdb_flush (gdb_stdout);
- if (objfile->sf == NULL)
- {
- gdb::observers::new_objfile.notify (objfile);
- return objfile; /* No symbols. */
- }
- finish_new_objfile (objfile, add_flags);
- gdb::observers::new_objfile.notify (objfile);
- bfd_cache_close_all ();
- return (objfile);
- }
- /* Add BFD as a separate debug file for OBJFILE. For NAME description
- see the objfile constructor. */
- void
- symbol_file_add_separate (bfd *bfd, const char *name,
- symfile_add_flags symfile_flags,
- struct objfile *objfile)
- {
- /* Create section_addr_info. We can't directly use offsets from OBJFILE
- because sections of BFD may not match sections of OBJFILE and because
- vma may have been modified by tools such as prelink. */
- section_addr_info sap = build_section_addr_info_from_objfile (objfile);
- symbol_file_add_with_addrs
- (bfd, name, symfile_flags, &sap,
- objfile->flags & (OBJF_REORDERED | OBJF_SHARED | OBJF_READNOW
- | OBJF_USERLOADED | OBJF_MAINLINE),
- objfile);
- }
- /* Process the symbol file ABFD, as either the main file or as a
- dynamically loaded file.
- See symbol_file_add_with_addrs's comments for details. */
- struct objfile *
- symbol_file_add_from_bfd (bfd *abfd, const char *name,
- symfile_add_flags add_flags,
- section_addr_info *addrs,
- objfile_flags flags, struct objfile *parent)
- {
- return symbol_file_add_with_addrs (abfd, name, add_flags, addrs, flags,
- parent);
- }
- /* Process a symbol file, as either the main file or as a dynamically
- loaded file. See symbol_file_add_with_addrs's comments for details. */
- struct objfile *
- symbol_file_add (const char *name, symfile_add_flags add_flags,
- section_addr_info *addrs, objfile_flags flags)
- {
- gdb_bfd_ref_ptr bfd (symfile_bfd_open (name));
- return symbol_file_add_from_bfd (bfd.get (), name, add_flags, addrs,
- flags, NULL);
- }
- /* Call symbol_file_add() with default values and update whatever is
- affected by the loading of a new main().
- Used when the file is supplied in the gdb command line
- and by some targets with special loading requirements.
- The auxiliary function, symbol_file_add_main_1(), has the flags
- argument for the switches that can only be specified in the symbol_file
- command itself. */
- void
- symbol_file_add_main (const char *args, symfile_add_flags add_flags)
- {
- symbol_file_add_main_1 (args, add_flags, 0, 0);
- }
- static void
- symbol_file_add_main_1 (const char *args, symfile_add_flags add_flags,
- objfile_flags flags, CORE_ADDR reloff)
- {
- add_flags |= current_inferior ()->symfile_flags | SYMFILE_MAINLINE;
- struct objfile *objfile = symbol_file_add (args, add_flags, NULL, flags);
- if (reloff != 0)
- objfile_rebase (objfile, reloff);
- /* Getting new symbols may change our opinion about
- what is frameless. */
- reinit_frame_cache ();
- if ((add_flags & SYMFILE_NO_READ) == 0)
- set_initial_language ();
- }
- void
- symbol_file_clear (int from_tty)
- {
- if ((have_full_symbols () || have_partial_symbols ())
- && from_tty
- && (current_program_space->symfile_object_file
- ? !query (_("Discard symbol table from `%s'? "),
- objfile_name (current_program_space->symfile_object_file))
- : !query (_("Discard symbol table? "))))
- error (_("Not confirmed."));
- /* solib descriptors may have handles to objfiles. Wipe them before their
- objfiles get stale by free_all_objfiles. */
- no_shared_libraries (NULL, from_tty);
- current_program_space->free_all_objfiles ();
- clear_symtab_users (0);
- gdb_assert (current_program_space->symfile_object_file == NULL);
- if (from_tty)
- gdb_printf (_("No symbol file now.\n"));
- }
- /* See symfile.h. */
- bool separate_debug_file_debug = false;
- static int
- separate_debug_file_exists (const std::string &name, unsigned long crc,
- struct objfile *parent_objfile)
- {
- unsigned long file_crc;
- int file_crc_p;
- struct stat parent_stat, abfd_stat;
- int verified_as_different;
- /* Find a separate debug info file as if symbols would be present in
- PARENT_OBJFILE itself this function would not be called. .gnu_debuglink
- section can contain just the basename of PARENT_OBJFILE without any
- ".debug" suffix as "/usr/lib/debug/path/to/file" is a separate tree where
- the separate debug infos with the same basename can exist. */
- if (filename_cmp (name.c_str (), objfile_name (parent_objfile)) == 0)
- return 0;
- if (separate_debug_file_debug)
- {
- gdb_printf (gdb_stdlog, _(" Trying %s..."), name.c_str ());
- gdb_flush (gdb_stdlog);
- }
- gdb_bfd_ref_ptr abfd (gdb_bfd_open (name.c_str (), gnutarget));
- if (abfd == NULL)
- {
- if (separate_debug_file_debug)
- gdb_printf (gdb_stdlog, _(" no, unable to open.\n"));
- return 0;
- }
- /* Verify symlinks were not the cause of filename_cmp name difference above.
- Some operating systems, e.g. Windows, do not provide a meaningful
- st_ino; they always set it to zero. (Windows does provide a
- meaningful st_dev.) Files accessed from gdbservers that do not
- support the vFile:fstat packet will also have st_ino set to zero.
- Do not indicate a duplicate library in either case. While there
- is no guarantee that a system that provides meaningful inode
- numbers will never set st_ino to zero, this is merely an
- optimization, so we do not need to worry about false negatives. */
- if (bfd_stat (abfd.get (), &abfd_stat) == 0
- && abfd_stat.st_ino != 0
- && bfd_stat (parent_objfile->obfd, &parent_stat) == 0)
- {
- if (abfd_stat.st_dev == parent_stat.st_dev
- && abfd_stat.st_ino == parent_stat.st_ino)
- {
- if (separate_debug_file_debug)
- gdb_printf (gdb_stdlog,
- _(" no, same file as the objfile.\n"));
- return 0;
- }
- verified_as_different = 1;
- }
- else
- verified_as_different = 0;
- file_crc_p = gdb_bfd_crc (abfd.get (), &file_crc);
- if (!file_crc_p)
- {
- if (separate_debug_file_debug)
- gdb_printf (gdb_stdlog, _(" no, error computing CRC.\n"));
- return 0;
- }
- if (crc != file_crc)
- {
- unsigned long parent_crc;
- /* If the files could not be verified as different with
- bfd_stat then we need to calculate the parent's CRC
- to verify whether the files are different or not. */
- if (!verified_as_different)
- {
- if (!gdb_bfd_crc (parent_objfile->obfd, &parent_crc))
- {
- if (separate_debug_file_debug)
- gdb_printf (gdb_stdlog,
- _(" no, error computing CRC.\n"));
- return 0;
- }
- }
- if (verified_as_different || parent_crc != file_crc)
- warning (_("the debug information found in \"%s\""
- " does not match \"%s\" (CRC mismatch).\n"),
- name.c_str (), objfile_name (parent_objfile));
- if (separate_debug_file_debug)
- gdb_printf (gdb_stdlog, _(" no, CRC doesn't match.\n"));
- return 0;
- }
- if (separate_debug_file_debug)
- gdb_printf (gdb_stdlog, _(" yes!\n"));
- return 1;
- }
- std::string debug_file_directory;
- static void
- show_debug_file_directory (struct ui_file *file, int from_tty,
- struct cmd_list_element *c, const char *value)
- {
- gdb_printf (file,
- _("The directory where separate debug "
- "symbols are searched for is \"%s\".\n"),
- value);
- }
- #if ! defined (DEBUG_SUBDIRECTORY)
- #define DEBUG_SUBDIRECTORY ".debug"
- #endif
- /* Find a separate debuginfo file for OBJFILE, using DIR as the directory
- where the original file resides (may not be the same as
- dirname(objfile->name) due to symlinks), and DEBUGLINK as the file we are
- looking for. CANON_DIR is the "realpath" form of DIR.
- DIR must contain a trailing '/'.
- Returns the path of the file with separate debug info, or an empty
- string. */
- static std::string
- find_separate_debug_file (const char *dir,
- const char *canon_dir,
- const char *debuglink,
- unsigned long crc32, struct objfile *objfile)
- {
- if (separate_debug_file_debug)
- gdb_printf (gdb_stdlog,
- _("\nLooking for separate debug info (debug link) for "
- "%s\n"), objfile_name (objfile));
- /* First try in the same directory as the original file. */
- std::string debugfile = dir;
- debugfile += debuglink;
- if (separate_debug_file_exists (debugfile, crc32, objfile))
- return debugfile;
- /* Then try in the subdirectory named DEBUG_SUBDIRECTORY. */
- debugfile = dir;
- debugfile += DEBUG_SUBDIRECTORY;
- debugfile += "/";
- debugfile += debuglink;
- if (separate_debug_file_exists (debugfile, crc32, objfile))
- return debugfile;
- /* Then try in the global debugfile directories.
- Keep backward compatibility so that DEBUG_FILE_DIRECTORY being "" will
- cause "/..." lookups. */
- bool target_prefix = startswith (dir, "target:");
- const char *dir_notarget = target_prefix ? dir + strlen ("target:") : dir;
- std::vector<gdb::unique_xmalloc_ptr<char>> debugdir_vec
- = dirnames_to_char_ptr_vec (debug_file_directory.c_str ());
- gdb::unique_xmalloc_ptr<char> canon_sysroot
- = gdb_realpath (gdb_sysroot.c_str ());
- /* MS-Windows/MS-DOS don't allow colons in file names; we must
- convert the drive letter into a one-letter directory, so that the
- file name resulting from splicing below will be valid.
- FIXME: The below only works when GDB runs on MS-Windows/MS-DOS.
- There are various remote-debugging scenarios where such a
- transformation of the drive letter might be required when GDB runs
- on a Posix host, see
- https://sourceware.org/ml/gdb-patches/2019-04/msg00605.html
- If some of those scenarios need to be supported, we will need to
- use a different condition for HAS_DRIVE_SPEC and a different macro
- instead of STRIP_DRIVE_SPEC, which work on Posix systems as well. */
- std::string drive;
- if (HAS_DRIVE_SPEC (dir_notarget))
- {
- drive = dir_notarget[0];
- dir_notarget = STRIP_DRIVE_SPEC (dir_notarget);
- }
- for (const gdb::unique_xmalloc_ptr<char> &debugdir : debugdir_vec)
- {
- debugfile = target_prefix ? "target:" : "";
- debugfile += debugdir;
- debugfile += "/";
- debugfile += drive;
- debugfile += dir_notarget;
- debugfile += debuglink;
- if (separate_debug_file_exists (debugfile, crc32, objfile))
- return debugfile;
- const char *base_path = NULL;
- if (canon_dir != NULL)
- {
- if (canon_sysroot.get () != NULL)
- base_path = child_path (canon_sysroot.get (), canon_dir);
- else
- base_path = child_path (gdb_sysroot.c_str (), canon_dir);
- }
- if (base_path != NULL)
- {
- /* If the file is in the sysroot, try using its base path in
- the global debugfile directory. */
- debugfile = target_prefix ? "target:" : "";
- debugfile += debugdir;
- debugfile += "/";
- debugfile += base_path;
- debugfile += "/";
- debugfile += debuglink;
- if (separate_debug_file_exists (debugfile, crc32, objfile))
- return debugfile;
- /* If the file is in the sysroot, try using its base path in
- the sysroot's global debugfile directory. */
- debugfile = target_prefix ? "target:" : "";
- debugfile += gdb_sysroot;
- debugfile += debugdir;
- debugfile += "/";
- debugfile += base_path;
- debugfile += "/";
- debugfile += debuglink;
- if (separate_debug_file_exists (debugfile, crc32, objfile))
- return debugfile;
- }
- }
- return std::string ();
- }
- /* Modify PATH to contain only "[/]directory/" part of PATH.
- If there were no directory separators in PATH, PATH will be empty
- string on return. */
- static void
- terminate_after_last_dir_separator (char *path)
- {
- int i;
- /* Strip off the final filename part, leaving the directory name,
- followed by a slash. The directory can be relative or absolute. */
- for (i = strlen(path) - 1; i >= 0; i--)
- if (IS_DIR_SEPARATOR (path[i]))
- break;
- /* If I is -1 then no directory is present there and DIR will be "". */
- path[i + 1] = '\0';
- }
- /* Find separate debuginfo for OBJFILE (using .gnu_debuglink section).
- Returns pathname, or an empty string. */
- std::string
- find_separate_debug_file_by_debuglink (struct objfile *objfile)
- {
- unsigned long crc32;
- gdb::unique_xmalloc_ptr<char> debuglink
- (bfd_get_debug_link_info (objfile->obfd, &crc32));
- if (debuglink == NULL)
- {
- /* There's no separate debug info, hence there's no way we could
- load it => no warning. */
- return std::string ();
- }
- std::string dir = objfile_name (objfile);
- terminate_after_last_dir_separator (&dir[0]);
- gdb::unique_xmalloc_ptr<char> canon_dir (lrealpath (dir.c_str ()));
- std::string debugfile
- = find_separate_debug_file (dir.c_str (), canon_dir.get (),
- debuglink.get (), crc32, objfile);
- if (debugfile.empty ())
- {
- /* For PR gdb/9538, try again with realpath (if different from the
- original). */
- struct stat st_buf;
- if (lstat (objfile_name (objfile), &st_buf) == 0
- && S_ISLNK (st_buf.st_mode))
- {
- gdb::unique_xmalloc_ptr<char> symlink_dir
- (lrealpath (objfile_name (objfile)));
- if (symlink_dir != NULL)
- {
- terminate_after_last_dir_separator (symlink_dir.get ());
- if (dir != symlink_dir.get ())
- {
- /* Different directory, so try using it. */
- debugfile = find_separate_debug_file (symlink_dir.get (),
- symlink_dir.get (),
- debuglink.get (),
- crc32,
- objfile);
- }
- }
- }
- }
- return debugfile;
- }
- /* Make sure that OBJF_{READNOW,READNEVER} are not set
- simultaneously. */
- static void
- validate_readnow_readnever (objfile_flags flags)
- {
- if ((flags & OBJF_READNOW) && (flags & OBJF_READNEVER))
- error (_("-readnow and -readnever cannot be used simultaneously"));
- }
- /* This is the symbol-file command. Read the file, analyze its
- symbols, and add a struct symtab to a symtab list. The syntax of
- the command is rather bizarre:
- 1. The function buildargv implements various quoting conventions
- which are undocumented and have little or nothing in common with
- the way things are quoted (or not quoted) elsewhere in GDB.
- 2. Options are used, which are not generally used in GDB (perhaps
- "set mapped on", "set readnow on" would be better)
- 3. The order of options matters, which is contrary to GNU
- conventions (because it is confusing and inconvenient). */
- void
- symbol_file_command (const char *args, int from_tty)
- {
- dont_repeat ();
- if (args == NULL)
- {
- symbol_file_clear (from_tty);
- }
- else
- {
- objfile_flags flags = OBJF_USERLOADED;
- symfile_add_flags add_flags = 0;
- char *name = NULL;
- bool stop_processing_options = false;
- CORE_ADDR offset = 0;
- int idx;
- char *arg;
- if (from_tty)
- add_flags |= SYMFILE_VERBOSE;
- gdb_argv built_argv (args);
- for (arg = built_argv[0], idx = 0; arg != NULL; arg = built_argv[++idx])
- {
- if (stop_processing_options || *arg != '-')
- {
- if (name == NULL)
- name = arg;
- else
- error (_("Unrecognized argument \"%s\""), arg);
- }
- else if (strcmp (arg, "-readnow") == 0)
- flags |= OBJF_READNOW;
- else if (strcmp (arg, "-readnever") == 0)
- flags |= OBJF_READNEVER;
- else if (strcmp (arg, "-o") == 0)
- {
- arg = built_argv[++idx];
- if (arg == NULL)
- error (_("Missing argument to -o"));
- offset = parse_and_eval_address (arg);
- }
- else if (strcmp (arg, "--") == 0)
- stop_processing_options = true;
- else
- error (_("Unrecognized argument \"%s\""), arg);
- }
- if (name == NULL)
- error (_("no symbol file name was specified"));
- validate_readnow_readnever (flags);
- /* Set SYMFILE_DEFER_BP_RESET because the proper displacement for a PIE
- (Position Independent Executable) main symbol file will only be
- computed by the solib_create_inferior_hook below. Without it,
- breakpoint_re_set would fail to insert the breakpoints with the zero
- displacement. */
- add_flags |= SYMFILE_DEFER_BP_RESET;
- symbol_file_add_main_1 (name, add_flags, flags, offset);
- solib_create_inferior_hook (from_tty);
- /* Now it's safe to re-add the breakpoints. */
- breakpoint_re_set ();
- }
- }
- /* Set the initial language. */
- void
- set_initial_language (void)
- {
- if (language_mode == language_mode_manual)
- return;
- enum language lang = main_language ();
- /* Make C the default language. */
- enum language default_lang = language_c;
- if (lang == language_unknown)
- {
- const char *name = main_name ();
- struct symbol *sym
- = lookup_symbol_in_language (name, NULL, VAR_DOMAIN, default_lang,
- NULL).symbol;
- if (sym != NULL)
- lang = sym->language ();
- }
- if (lang == language_unknown)
- {
- lang = default_lang;
- }
- set_language (lang);
- expected_language = current_language; /* Don't warn the user. */
- }
- /* Open the file specified by NAME and hand it off to BFD for
- preliminary analysis. Return a newly initialized bfd *, which
- includes a newly malloc'd` copy of NAME (tilde-expanded and made
- absolute). In case of trouble, error() is called. */
- gdb_bfd_ref_ptr
- symfile_bfd_open (const char *name)
- {
- int desc = -1;
- gdb::unique_xmalloc_ptr<char> absolute_name;
- if (!is_target_filename (name))
- {
- gdb::unique_xmalloc_ptr<char> expanded_name (tilde_expand (name));
- /* Look down path for it, allocate 2nd new malloc'd copy. */
- desc = openp (getenv ("PATH"),
- OPF_TRY_CWD_FIRST | OPF_RETURN_REALPATH,
- expanded_name.get (), O_RDONLY | O_BINARY, &absolute_name);
- #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__)
- if (desc < 0)
- {
- char *exename = (char *) alloca (strlen (expanded_name.get ()) + 5);
- strcat (strcpy (exename, expanded_name.get ()), ".exe");
- desc = openp (getenv ("PATH"),
- OPF_TRY_CWD_FIRST | OPF_RETURN_REALPATH,
- exename, O_RDONLY | O_BINARY, &absolute_name);
- }
- #endif
- if (desc < 0)
- perror_with_name (expanded_name.get ());
- name = absolute_name.get ();
- }
- gdb_bfd_ref_ptr sym_bfd (gdb_bfd_open (name, gnutarget, desc));
- if (sym_bfd == NULL)
- error (_("`%s': can't open to read symbols: %s."), name,
- bfd_errmsg (bfd_get_error ()));
- if (!gdb_bfd_has_target_filename (sym_bfd.get ()))
- bfd_set_cacheable (sym_bfd.get (), 1);
- if (!bfd_check_format (sym_bfd.get (), bfd_object))
- error (_("`%s': can't read symbols: %s."), name,
- bfd_errmsg (bfd_get_error ()));
- return sym_bfd;
- }
- /* Return the section index for SECTION_NAME on OBJFILE. Return -1 if
- the section was not found. */
- int
- get_section_index (struct objfile *objfile, const char *section_name)
- {
- asection *sect = bfd_get_section_by_name (objfile->obfd, section_name);
- if (sect)
- return sect->index;
- else
- return -1;
- }
- /* Link SF into the global symtab_fns list.
- FLAVOUR is the file format that SF handles.
- Called on startup by the _initialize routine in each object file format
- reader, to register information about each format the reader is prepared
- to handle. */
- void
- add_symtab_fns (enum bfd_flavour flavour, const struct sym_fns *sf)
- {
- symtab_fns.emplace_back (flavour, sf);
- }
- /* Initialize OBJFILE to read symbols from its associated BFD. It
- either returns or calls error(). The result is an initialized
- struct sym_fns in the objfile structure, that contains cached
- information about the symbol file. */
- static const struct sym_fns *
- find_sym_fns (bfd *abfd)
- {
- enum bfd_flavour our_flavour = bfd_get_flavour (abfd);
- if (our_flavour == bfd_target_srec_flavour
- || our_flavour == bfd_target_ihex_flavour
- || our_flavour == bfd_target_tekhex_flavour)
- return NULL; /* No symbols. */
- for (const registered_sym_fns &rsf : symtab_fns)
- if (our_flavour == rsf.sym_flavour)
- return rsf.sym_fns;
- error (_("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown."),
- bfd_get_target (abfd));
- }
- /* This function runs the load command of our current target. */
- static void
- load_command (const char *arg, int from_tty)
- {
- dont_repeat ();
- /* The user might be reloading because the binary has changed. Take
- this opportunity to check. */
- reopen_exec_file ();
- reread_symbols (from_tty);
- std::string temp;
- if (arg == NULL)
- {
- const char *parg, *prev;
- arg = get_exec_file (1);
- /* We may need to quote this string so buildargv can pull it
- apart. */
- prev = parg = arg;
- while ((parg = strpbrk (parg, "\\\"'\t ")))
- {
- temp.append (prev, parg - prev);
- prev = parg++;
- temp.push_back ('\\');
- }
- /* If we have not copied anything yet, then we didn't see a
- character to quote, and we can just leave ARG unchanged. */
- if (!temp.empty ())
- {
- temp.append (prev);
- arg = temp.c_str ();
- }
- }
- target_load (arg, from_tty);
- /* After re-loading the executable, we don't really know which
- overlays are mapped any more. */
- overlay_cache_invalid = 1;
- }
- /* This version of "load" should be usable for any target. Currently
- it is just used for remote targets, not inftarg.c or core files,
- on the theory that only in that case is it useful.
- Avoiding xmodem and the like seems like a win (a) because we don't have
- to worry about finding it, and (b) On VMS, fork() is very slow and so
- we don't want to run a subprocess. On the other hand, I'm not sure how
- performance compares. */
- static int validate_download = 0;
- /* Opaque data for load_progress. */
- struct load_progress_data
- {
- /* Cumulative data. */
- unsigned long write_count = 0;
- unsigned long data_count = 0;
- bfd_size_type total_size = 0;
- };
- /* Opaque data for load_progress for a single section. */
- struct load_progress_section_data
- {
- load_progress_section_data (load_progress_data *cumulative_,
- const char *section_name_, ULONGEST section_size_,
- CORE_ADDR lma_, gdb_byte *buffer_)
- : cumulative (cumulative_), section_name (section_name_),
- section_size (section_size_), lma (lma_), buffer (buffer_)
- {}
- struct load_progress_data *cumulative;
- /* Per-section data. */
- const char *section_name;
- ULONGEST section_sent = 0;
- ULONGEST section_size;
- CORE_ADDR lma;
- gdb_byte *buffer;
- };
- /* Opaque data for load_section_callback. */
- struct load_section_data
- {
- load_section_data (load_progress_data *progress_data_)
- : progress_data (progress_data_)
- {}
- ~load_section_data ()
- {
- for (auto &&request : requests)
- {
- xfree (request.data);
- delete ((load_progress_section_data *) request.baton);
- }
- }
- CORE_ADDR load_offset = 0;
- struct load_progress_data *progress_data;
- std::vector<struct memory_write_request> requests;
- };
- /* Target write callback routine for progress reporting. */
- static void
- load_progress (ULONGEST bytes, void *untyped_arg)
- {
- struct load_progress_section_data *args
- = (struct load_progress_section_data *) untyped_arg;
- struct load_progress_data *totals;
- if (args == NULL)
- /* Writing padding data. No easy way to get at the cumulative
- stats, so just ignore this. */
- return;
- totals = args->cumulative;
- if (bytes == 0 && args->section_sent == 0)
- {
- /* The write is just starting. Let the user know we've started
- this section. */
- current_uiout->message ("Loading section %s, size %s lma %s\n",
- args->section_name,
- hex_string (args->section_size),
- paddress (target_gdbarch (), args->lma));
- return;
- }
- if (validate_download)
- {
- /* Broken memories and broken monitors manifest themselves here
- when bring new computers to life. This doubles already slow
- downloads. */
- /* NOTE: cagney/1999-10-18: A more efficient implementation
- might add a verify_memory() method to the target vector and
- then use that. remote.c could implement that method using
- the ``qCRC'' packet. */
- gdb::byte_vector check (bytes);
- if (target_read_memory (args->lma, check.data (), bytes) != 0)
- error (_("Download verify read failed at %s"),
- paddress (target_gdbarch (), args->lma));
- if (memcmp (args->buffer, check.data (), bytes) != 0)
- error (_("Download verify compare failed at %s"),
- paddress (target_gdbarch (), args->lma));
- }
- totals->data_count += bytes;
- args->lma += bytes;
- args->buffer += bytes;
- totals->write_count += 1;
- args->section_sent += bytes;
- if (check_quit_flag ()
- || (deprecated_ui_load_progress_hook != NULL
- && deprecated_ui_load_progress_hook (args->section_name,
- args->section_sent)))
- error (_("Canceled the download"));
- if (deprecated_show_load_progress != NULL)
- deprecated_show_load_progress (args->section_name,
- args->section_sent,
- args->section_size,
- totals->data_count,
- totals->total_size);
- }
- /* Service function for generic_load. */
- static void
- load_one_section (bfd *abfd, asection *asec,
- struct load_section_data *args)
- {
- bfd_size_type size = bfd_section_size (asec);
- const char *sect_name = bfd_section_name (asec);
- if ((bfd_section_flags (asec) & SEC_LOAD) == 0)
- return;
- if (size == 0)
- return;
- ULONGEST begin = bfd_section_lma (asec) + args->load_offset;
- ULONGEST end = begin + size;
- gdb_byte *buffer = (gdb_byte *) xmalloc (size);
- bfd_get_section_contents (abfd, asec, buffer, 0, size);
- load_progress_section_data *section_data
- = new load_progress_section_data (args->progress_data, sect_name, size,
- begin, buffer);
- args->requests.emplace_back (begin, end, buffer, section_data);
- }
- static void print_transfer_performance (struct ui_file *stream,
- unsigned long data_count,
- unsigned long write_count,
- std::chrono::steady_clock::duration d);
- /* See symfile.h. */
- void
- generic_load (const char *args, int from_tty)
- {
- struct load_progress_data total_progress;
- struct load_section_data cbdata (&total_progress);
- struct ui_out *uiout = current_uiout;
- if (args == NULL)
- error_no_arg (_("file to load"));
- gdb_argv argv (args);
- gdb::unique_xmalloc_ptr<char> filename (tilde_expand (argv[0]));
- if (argv[1] != NULL)
- {
- const char *endptr;
- cbdata.load_offset = strtoulst (argv[1], &endptr, 0);
- /* If the last word was not a valid number then
- treat it as a file name with spaces in. */
- if (argv[1] == endptr)
- error (_("Invalid download offset:%s."), argv[1]);
- if (argv[2] != NULL)
- error (_("Too many parameters."));
- }
- /* Open the file for loading. */
- gdb_bfd_ref_ptr loadfile_bfd (gdb_bfd_open (filename.get (), gnutarget));
- if (loadfile_bfd == NULL)
- perror_with_name (filename.get ());
- if (!bfd_check_format (loadfile_bfd.get (), bfd_object))
- {
- error (_("\"%s\" is not an object file: %s"), filename.get (),
- bfd_errmsg (bfd_get_error ()));
- }
- for (asection *asec : gdb_bfd_sections (loadfile_bfd))
- total_progress.total_size += bfd_section_size (asec);
- for (asection *asec : gdb_bfd_sections (loadfile_bfd))
- load_one_section (loadfile_bfd.get (), asec, &cbdata);
- using namespace std::chrono;
- steady_clock::time_point start_time = steady_clock::now ();
- if (target_write_memory_blocks (cbdata.requests, flash_discard,
- load_progress) != 0)
- error (_("Load failed"));
- steady_clock::time_point end_time = steady_clock::now ();
- CORE_ADDR entry = bfd_get_start_address (loadfile_bfd.get ());
- entry = gdbarch_addr_bits_remove (target_gdbarch (), entry);
- uiout->text ("Start address ");
- uiout->field_core_addr ("address", target_gdbarch (), entry);
- uiout->text (", load size ");
- uiout->field_unsigned ("load-size", total_progress.data_count);
- uiout->text ("\n");
- regcache_write_pc (get_current_regcache (), entry);
- /* Reset breakpoints, now that we have changed the load image. For
- instance, breakpoints may have been set (or reset, by
- post_create_inferior) while connected to the target but before we
- loaded the program. In that case, the prologue analyzer could
- have read instructions from the target to find the right
- breakpoint locations. Loading has changed the contents of that
- memory. */
- breakpoint_re_set ();
- print_transfer_performance (gdb_stdout, total_progress.data_count,
- total_progress.write_count,
- end_time - start_time);
- }
- /* Report on STREAM the performance of a memory transfer operation,
- such as 'load'. DATA_COUNT is the number of bytes transferred.
- WRITE_COUNT is the number of separate write operations, or 0, if
- that information is not available. TIME is how long the operation
- lasted. */
- static void
- print_transfer_performance (struct ui_file *stream,
- unsigned long data_count,
- unsigned long write_count,
- std::chrono::steady_clock::duration time)
- {
- using namespace std::chrono;
- struct ui_out *uiout = current_uiout;
- milliseconds ms = duration_cast<milliseconds> (time);
- uiout->text ("Transfer rate: ");
- if (ms.count () > 0)
- {
- unsigned long rate = ((ULONGEST) data_count * 1000) / ms.count ();
- if (uiout->is_mi_like_p ())
- {
- uiout->field_unsigned ("transfer-rate", rate * 8);
- uiout->text (" bits/sec");
- }
- else if (rate < 1024)
- {
- uiout->field_unsigned ("transfer-rate", rate);
- uiout->text (" bytes/sec");
- }
- else
- {
- uiout->field_unsigned ("transfer-rate", rate / 1024);
- uiout->text (" KB/sec");
- }
- }
- else
- {
- uiout->field_unsigned ("transferred-bits", (data_count * 8));
- uiout->text (" bits in <1 sec");
- }
- if (write_count > 0)
- {
- uiout->text (", ");
- uiout->field_unsigned ("write-rate", data_count / write_count);
- uiout->text (" bytes/write");
- }
- uiout->text (".\n");
- }
- /* Add an OFFSET to the start address of each section in OBJF, except
- sections that were specified in ADDRS. */
- static void
- set_objfile_default_section_offset (struct objfile *objf,
- const section_addr_info &addrs,
- CORE_ADDR offset)
- {
- /* Add OFFSET to all sections by default. */
- section_offsets offsets (objf->section_offsets.size (), offset);
- /* Create sorted lists of all sections in ADDRS as well as all
- sections in OBJF. */
- std::vector<const struct other_sections *> addrs_sorted
- = addrs_section_sort (addrs);
- section_addr_info objf_addrs
- = build_section_addr_info_from_objfile (objf);
- std::vector<const struct other_sections *> objf_addrs_sorted
- = addrs_section_sort (objf_addrs);
- /* Walk the BFD section list, and if a matching section is found in
- ADDRS_SORTED_LIST, set its offset to zero to keep its address
- unchanged.
- Note that both lists may contain multiple sections with the same
- name, and then the sections from ADDRS are matched in BFD order
- (thanks to sectindex). */
- std::vector<const struct other_sections *>::iterator addrs_sorted_iter
- = addrs_sorted.begin ();
- for (const other_sections *objf_sect : objf_addrs_sorted)
- {
- const char *objf_name = addr_section_name (objf_sect->name.c_str ());
- int cmp = -1;
- while (cmp < 0 && addrs_sorted_iter != addrs_sorted.end ())
- {
- const struct other_sections *sect = *addrs_sorted_iter;
- const char *sect_name = addr_section_name (sect->name.c_str ());
- cmp = strcmp (sect_name, objf_name);
- if (cmp <= 0)
- ++addrs_sorted_iter;
- }
- if (cmp == 0)
- offsets[objf_sect->sectindex] = 0;
- }
- /* Apply the new section offsets. */
- objfile_relocate (objf, offsets);
- }
- /* This function allows the addition of incrementally linked object files.
- It does not modify any state in the target, only in the debugger. */
- static void
- add_symbol_file_command (const char *args, int from_tty)
- {
- struct gdbarch *gdbarch = get_current_arch ();
- gdb::unique_xmalloc_ptr<char> filename;
- char *arg;
- int argcnt = 0;
- struct objfile *objf;
- objfile_flags flags = OBJF_USERLOADED | OBJF_SHARED;
- symfile_add_flags add_flags = 0;
- if (from_tty)
- add_flags |= SYMFILE_VERBOSE;
- struct sect_opt
- {
- const char *name;
- const char *value;
- };
- std::vector<sect_opt> sect_opts = { { ".text", NULL } };
- bool stop_processing_options = false;
- CORE_ADDR offset = 0;
- dont_repeat ();
- if (args == NULL)
- error (_("add-symbol-file takes a file name and an address"));
- bool seen_addr = false;
- bool seen_offset = false;
- gdb_argv argv (args);
- for (arg = argv[0], argcnt = 0; arg != NULL; arg = argv[++argcnt])
- {
- if (stop_processing_options || *arg != '-')
- {
- if (filename == NULL)
- {
- /* First non-option argument is always the filename. */
- filename.reset (tilde_expand (arg));
- }
- else if (!seen_addr)
- {
- /* The second non-option argument is always the text
- address at which to load the program. */
- sect_opts[0].value = arg;
- seen_addr = true;
- }
- else
- error (_("Unrecognized argument \"%s\""), arg);
- }
- else if (strcmp (arg, "-readnow") == 0)
- flags |= OBJF_READNOW;
- else if (strcmp (arg, "-readnever") == 0)
- flags |= OBJF_READNEVER;
- else if (strcmp (arg, "-s") == 0)
- {
- if (argv[argcnt + 1] == NULL)
- error (_("Missing section name after \"-s\""));
- else if (argv[argcnt + 2] == NULL)
- error (_("Missing section address after \"-s\""));
- sect_opt sect = { argv[argcnt + 1], argv[argcnt + 2] };
- sect_opts.push_back (sect);
- argcnt += 2;
- }
- else if (strcmp (arg, "-o") == 0)
- {
- arg = argv[++argcnt];
- if (arg == NULL)
- error (_("Missing argument to -o"));
- offset = parse_and_eval_address (arg);
- seen_offset = true;
- }
- else if (strcmp (arg, "--") == 0)
- stop_processing_options = true;
- else
- error (_("Unrecognized argument \"%s\""), arg);
- }
- if (filename == NULL)
- error (_("You must provide a filename to be loaded."));
- validate_readnow_readnever (flags);
- /* Print the prompt for the query below. And save the arguments into
- a sect_addr_info structure to be passed around to other
- functions. We have to split this up into separate print
- statements because hex_string returns a local static
- string. */
- gdb_printf (_("add symbol table from file \"%s\""),
- filename.get ());
- section_addr_info section_addrs;
- std::vector<sect_opt>::const_iterator it = sect_opts.begin ();
- if (!seen_addr)
- ++it;
- for (; it != sect_opts.end (); ++it)
- {
- CORE_ADDR addr;
- const char *val = it->value;
- const char *sec = it->name;
- if (section_addrs.empty ())
- gdb_printf (_(" at\n"));
- addr = parse_and_eval_address (val);
- /* Here we store the section offsets in the order they were
- entered on the command line. Every array element is
- assigned an ascending section index to preserve the above
- order over an unstable sorting algorithm. This dummy
- index is not used for any other purpose.
- */
- section_addrs.emplace_back (addr, sec, section_addrs.size ());
- gdb_printf ("\t%s_addr = %s\n", sec,
- paddress (gdbarch, addr));
- /* The object's sections are initialized when a
- call is made to build_objfile_section_table (objfile).
- This happens in reread_symbols.
- At this point, we don't know what file type this is,
- so we can't determine what section names are valid. */
- }
- if (seen_offset)
- gdb_printf (_("%s offset by %s\n"),
- (section_addrs.empty ()
- ? _(" with all sections")
- : _("with other sections")),
- paddress (gdbarch, offset));
- else if (section_addrs.empty ())
- gdb_printf ("\n");
- if (from_tty && (!query ("%s", "")))
- error (_("Not confirmed."));
- objf = symbol_file_add (filename.get (), add_flags, §ion_addrs,
- flags);
- if (!objfile_has_symbols (objf) && objf->per_bfd->minimal_symbol_count <= 0)
- warning (_("newly-added symbol file \"%s\" does not provide any symbols"),
- filename.get ());
- if (seen_offset)
- set_objfile_default_section_offset (objf, section_addrs, offset);
- current_program_space->add_target_sections (objf);
- /* Getting new symbols may change our opinion about what is
- frameless. */
- reinit_frame_cache ();
- }
- /* This function removes a symbol file that was added via add-symbol-file. */
- static void
- remove_symbol_file_command (const char *args, int from_tty)
- {
- struct objfile *objf = NULL;
- struct program_space *pspace = current_program_space;
- dont_repeat ();
- if (args == NULL)
- error (_("remove-symbol-file: no symbol file provided"));
- gdb_argv argv (args);
- if (strcmp (argv[0], "-a") == 0)
- {
- /* Interpret the next argument as an address. */
- CORE_ADDR addr;
- if (argv[1] == NULL)
- error (_("Missing address argument"));
- if (argv[2] != NULL)
- error (_("Junk after %s"), argv[1]);
- addr = parse_and_eval_address (argv[1]);
- for (objfile *objfile : current_program_space->objfiles ())
- {
- if ((objfile->flags & OBJF_USERLOADED) != 0
- && (objfile->flags & OBJF_SHARED) != 0
- && objfile->pspace == pspace
- && is_addr_in_objfile (addr, objfile))
- {
- objf = objfile;
- break;
- }
- }
- }
- else if (argv[0] != NULL)
- {
- /* Interpret the current argument as a file name. */
- if (argv[1] != NULL)
- error (_("Junk after %s"), argv[0]);
- gdb::unique_xmalloc_ptr<char> filename (tilde_expand (argv[0]));
- for (objfile *objfile : current_program_space->objfiles ())
- {
- if ((objfile->flags & OBJF_USERLOADED) != 0
- && (objfile->flags & OBJF_SHARED) != 0
- && objfile->pspace == pspace
- && filename_cmp (filename.get (), objfile_name (objfile)) == 0)
- {
- objf = objfile;
- break;
- }
- }
- }
- if (objf == NULL)
- error (_("No symbol file found"));
- if (from_tty
- && !query (_("Remove symbol table from file \"%s\"? "),
- objfile_name (objf)))
- error (_("Not confirmed."));
- objf->unlink ();
- clear_symtab_users (0);
- }
- /* Re-read symbols if a symbol-file has changed. */
- void
- reread_symbols (int from_tty)
- {
- long new_modtime;
- struct stat new_statbuf;
- int res;
- std::vector<struct objfile *> new_objfiles;
- for (objfile *objfile : current_program_space->objfiles ())
- {
- if (objfile->obfd == NULL)
- continue;
- /* Separate debug objfiles are handled in the main objfile. */
- if (objfile->separate_debug_objfile_backlink)
- continue;
- /* If this object is from an archive (what you usually create with
- `ar', often called a `static library' on most systems, though
- a `shared library' on AIX is also an archive), then you should
- stat on the archive name, not member name. */
- if (objfile->obfd->my_archive)
- res = stat (bfd_get_filename (objfile->obfd->my_archive), &new_statbuf);
- else
- res = stat (objfile_name (objfile), &new_statbuf);
- if (res != 0)
- {
- /* FIXME, should use print_sys_errmsg but it's not filtered. */
- gdb_printf (_("`%s' has disappeared; keeping its symbols.\n"),
- objfile_name (objfile));
- continue;
- }
- new_modtime = new_statbuf.st_mtime;
- if (new_modtime != objfile->mtime)
- {
- gdb_printf (_("`%s' has changed; re-reading symbols.\n"),
- objfile_name (objfile));
- /* There are various functions like symbol_file_add,
- symfile_bfd_open, syms_from_objfile, etc., which might
- appear to do what we want. But they have various other
- effects which we *don't* want. So we just do stuff
- ourselves. We don't worry about mapped files (for one thing,
- any mapped file will be out of date). */
- /* If we get an error, blow away this objfile (not sure if
- that is the correct response for things like shared
- libraries). */
- objfile_up objfile_holder (objfile);
- /* We need to do this whenever any symbols go away. */
- clear_symtab_users_cleanup defer_clear_users (0);
- if (current_program_space->exec_bfd () != NULL
- && filename_cmp (bfd_get_filename (objfile->obfd),
- bfd_get_filename (current_program_space->exec_bfd ())) == 0)
- {
- /* Reload EXEC_BFD without asking anything. */
- exec_file_attach (bfd_get_filename (objfile->obfd), 0);
- }
- /* Keep the calls order approx. the same as in free_objfile. */
- /* Free the separate debug objfiles. It will be
- automatically recreated by sym_read. */
- free_objfile_separate_debug (objfile);
- /* Clear the stale source cache. */
- forget_cached_source_info ();
- /* Remove any references to this objfile in the global
- value lists. */
- preserve_values (objfile);
- /* Nuke all the state that we will re-read. Much of the following
- code which sets things to NULL really is necessary to tell
- other parts of GDB that there is nothing currently there.
- Try to keep the freeing order compatible with free_objfile. */
- if (objfile->sf != NULL)
- {
- (*objfile->sf->sym_finish) (objfile);
- }
- clear_objfile_data (objfile);
- /* Clean up any state BFD has sitting around. */
- {
- gdb_bfd_ref_ptr obfd (objfile->obfd);
- const char *obfd_filename;
- obfd_filename = bfd_get_filename (objfile->obfd);
- /* Open the new BFD before freeing the old one, so that
- the filename remains live. */
- gdb_bfd_ref_ptr temp (gdb_bfd_open (obfd_filename, gnutarget));
- objfile->obfd = temp.release ();
- if (objfile->obfd == NULL)
- error (_("Can't open %s to read symbols."), obfd_filename);
- }
- std::string original_name = objfile->original_name;
- /* bfd_openr sets cacheable to true, which is what we want. */
- if (!bfd_check_format (objfile->obfd, bfd_object))
- error (_("Can't read symbols from %s: %s."), objfile_name (objfile),
- bfd_errmsg (bfd_get_error ()));
- /* NB: after this call to obstack_free, objfiles_changed
- will need to be called (see discussion below). */
- obstack_free (&objfile->objfile_obstack, 0);
- objfile->sections = NULL;
- objfile->section_offsets.clear ();
- objfile->sect_index_bss = -1;
- objfile->sect_index_data = -1;
- objfile->sect_index_rodata = -1;
- objfile->sect_index_text = -1;
- objfile->compunit_symtabs = NULL;
- objfile->template_symbols = NULL;
- objfile->static_links.reset (nullptr);
- /* obstack_init also initializes the obstack so it is
- empty. We could use obstack_specify_allocation but
- gdb_obstack.h specifies the alloc/dealloc functions. */
- obstack_init (&objfile->objfile_obstack);
- /* set_objfile_per_bfd potentially allocates the per-bfd
- data on the objfile's obstack (if sharing data across
- multiple users is not possible), so it's important to
- do it *after* the obstack has been initialized. */
- set_objfile_per_bfd (objfile);
- objfile->original_name
- = obstack_strdup (&objfile->objfile_obstack, original_name);
- /* Reset the sym_fns pointer. The ELF reader can change it
- based on whether .gdb_index is present, and we need it to
- start over. PR symtab/15885 */
- objfile_set_sym_fns (objfile, find_sym_fns (objfile->obfd));
- objfile->qf.clear ();
- build_objfile_section_table (objfile);
- /* What the hell is sym_new_init for, anyway? The concept of
- distinguishing between the main file and additional files
- in this way seems rather dubious. */
- if (objfile == current_program_space->symfile_object_file)
- {
- (*objfile->sf->sym_new_init) (objfile);
- }
- (*objfile->sf->sym_init) (objfile);
- clear_complaints ();
- objfile->flags &= ~OBJF_PSYMTABS_READ;
- /* We are about to read new symbols and potentially also
- DWARF information. Some targets may want to pass addresses
- read from DWARF DIE's through an adjustment function before
- saving them, like MIPS, which may call into
- "find_pc_section". When called, that function will make
- use of per-objfile program space data.
- Since we discarded our section information above, we have
- dangling pointers in the per-objfile program space data
- structure. Force GDB to update the section mapping
- information by letting it know the objfile has changed,
- making the dangling pointers point to correct data
- again. */
- objfiles_changed ();
- /* Recompute section offsets and section indices. */
- objfile->sf->sym_offsets (objfile, {});
- read_symbols (objfile, 0);
- if ((objfile->flags & OBJF_READNOW))
- {
- const int mainline = objfile->flags & OBJF_MAINLINE;
- const int should_print = (print_symbol_loading_p (from_tty, mainline, 1)
- && readnow_symbol_files);
- if (should_print)
- gdb_printf (_("Expanding full symbols from %ps...\n"),
- styled_string (file_name_style.style (),
- objfile_name (objfile)));
- objfile->expand_all_symtabs ();
- }
- if (!objfile_has_symbols (objfile))
- {
- gdb_stdout->wrap_here (0);
- gdb_printf (_("(no debugging symbols found)\n"));
- gdb_stdout->wrap_here (0);
- }
- /* We're done reading the symbol file; finish off complaints. */
- clear_complaints ();
- /* Getting new symbols may change our opinion about what is
- frameless. */
- reinit_frame_cache ();
- /* Discard cleanups as symbol reading was successful. */
- objfile_holder.release ();
- defer_clear_users.release ();
- /* If the mtime has changed between the time we set new_modtime
- and now, we *want* this to be out of date, so don't call stat
- again now. */
- objfile->mtime = new_modtime;
- init_entry_point_info (objfile);
- new_objfiles.push_back (objfile);
- }
- }
- if (!new_objfiles.empty ())
- {
- clear_symtab_users (0);
- /* clear_objfile_data for each objfile was called before freeing it and
- gdb::observers::new_objfile.notify (NULL) has been called by
- clear_symtab_users above. Notify the new files now. */
- for (auto iter : new_objfiles)
- gdb::observers::new_objfile.notify (iter);
- /* At least one objfile has changed, so we can consider that
- the executable we're debugging has changed too. */
- gdb::observers::executable_changed.notify ();
- }
- }
- struct filename_language
- {
- filename_language (const std::string &ext_, enum language lang_)
- : ext (ext_), lang (lang_)
- {}
- std::string ext;
- enum language lang;
- };
- static std::vector<filename_language> filename_language_table;
- /* See symfile.h. */
- void
- add_filename_language (const char *ext, enum language lang)
- {
- gdb_assert (ext != nullptr);
- filename_language_table.emplace_back (ext, lang);
- }
- static std::string ext_args;
- static void
- show_ext_args (struct ui_file *file, int from_tty,
- struct cmd_list_element *c, const char *value)
- {
- gdb_printf (file,
- _("Mapping between filename extension "
- "and source language is \"%s\".\n"),
- value);
- }
- static void
- set_ext_lang_command (const char *args,
- int from_tty, struct cmd_list_element *e)
- {
- const char *begin = ext_args.c_str ();
- const char *end = ext_args.c_str ();
- /* First arg is filename extension, starting with '.' */
- if (*end != '.')
- error (_("'%s': Filename extension must begin with '.'"), ext_args.c_str ());
- /* Find end of first arg. */
- while (*end != '\0' && !isspace (*end))
- end++;
- if (*end == '\0')
- error (_("'%s': two arguments required -- "
- "filename extension and language"),
- ext_args.c_str ());
- /* Extract first arg, the extension. */
- std::string extension = ext_args.substr (0, end - begin);
- /* Find beginning of second arg, which should be a source language. */
- begin = skip_spaces (end);
- if (*begin == '\0')
- error (_("'%s': two arguments required -- "
- "filename extension and language"),
- ext_args.c_str ());
- /* Lookup the language from among those we know. */
- language lang = language_enum (begin);
- auto it = filename_language_table.begin ();
- /* Now lookup the filename extension: do we already know it? */
- for (; it != filename_language_table.end (); it++)
- {
- if (it->ext == extension)
- break;
- }
- if (it == filename_language_table.end ())
- {
- /* New file extension. */
- add_filename_language (extension.data (), lang);
- }
- else
- {
- /* Redefining a previously known filename extension. */
- /* if (from_tty) */
- /* query ("Really make files of type %s '%s'?", */
- /* ext_args, language_str (lang)); */
- it->lang = lang;
- }
- }
- static void
- info_ext_lang_command (const char *args, int from_tty)
- {
- gdb_printf (_("Filename extensions and the languages they represent:"));
- gdb_printf ("\n\n");
- for (const filename_language &entry : filename_language_table)
- gdb_printf ("\t%s\t- %s\n", entry.ext.c_str (),
- language_str (entry.lang));
- }
- enum language
- deduce_language_from_filename (const char *filename)
- {
- const char *cp;
- if (filename != NULL)
- if ((cp = strrchr (filename, '.')) != NULL)
- {
- for (const filename_language &entry : filename_language_table)
- if (entry.ext == cp)
- return entry.lang;
- }
- return language_unknown;
- }
- /* Allocate and initialize a new symbol table.
- CUST is from the result of allocate_compunit_symtab. */
- struct symtab *
- allocate_symtab (struct compunit_symtab *cust, const char *filename)
- {
- struct objfile *objfile = cust->objfile ();
- struct symtab *symtab
- = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct symtab);
- symtab->filename = objfile->intern (filename);
- symtab->fullname = NULL;
- symtab->set_language (deduce_language_from_filename (filename));
- /* This can be very verbose with lots of headers.
- Only print at higher debug levels. */
- if (symtab_create_debug >= 2)
- {
- /* Be a bit clever with debugging messages, and don't print objfile
- every time, only when it changes. */
- static std::string last_objfile_name;
- const char *this_objfile_name = objfile_name (objfile);
- if (last_objfile_name.empty () || last_objfile_name != this_objfile_name)
- {
- last_objfile_name = this_objfile_name;
- gdb_printf (gdb_stdlog,
- "Creating one or more symtabs for objfile %s ...\n",
- this_objfile_name);
- }
- gdb_printf (gdb_stdlog,
- "Created symtab %s for module %s.\n",
- host_address_to_string (symtab), filename);
- }
- /* Add it to CUST's list of symtabs. */
- cust->add_filetab (symtab);
- /* Backlink to the containing compunit symtab. */
- symtab->set_compunit (cust);
- return symtab;
- }
- /* Allocate and initialize a new compunit.
- NAME is the name of the main source file, if there is one, or some
- descriptive text if there are no source files. */
- struct compunit_symtab *
- allocate_compunit_symtab (struct objfile *objfile, const char *name)
- {
- struct compunit_symtab *cu = OBSTACK_ZALLOC (&objfile->objfile_obstack,
- struct compunit_symtab);
- const char *saved_name;
- cu->set_objfile (objfile);
- /* The name we record here is only for display/debugging purposes.
- Just save the basename to avoid path issues (too long for display,
- relative vs absolute, etc.). */
- saved_name = lbasename (name);
- cu->name = obstack_strdup (&objfile->objfile_obstack, saved_name);
- cu->set_debugformat ("unknown");
- if (symtab_create_debug)
- {
- gdb_printf (gdb_stdlog,
- "Created compunit symtab %s for %s.\n",
- host_address_to_string (cu),
- cu->name);
- }
- return cu;
- }
- /* Hook CU to the objfile it comes from. */
- void
- add_compunit_symtab_to_objfile (struct compunit_symtab *cu)
- {
- cu->next = cu->objfile ()->compunit_symtabs;
- cu->objfile ()->compunit_symtabs = cu;
- }
- /* Reset all data structures in gdb which may contain references to
- symbol table data. */
- void
- clear_symtab_users (symfile_add_flags add_flags)
- {
- /* Someday, we should do better than this, by only blowing away
- the things that really need to be blown. */
- /* Clear the "current" symtab first, because it is no longer valid.
- breakpoint_re_set may try to access the current symtab. */
- clear_current_source_symtab_and_line ();
- clear_displays ();
- clear_last_displayed_sal ();
- clear_pc_function_cache ();
- gdb::observers::new_objfile.notify (NULL);
- /* Varobj may refer to old symbols, perform a cleanup. */
- varobj_invalidate ();
- /* Now that the various caches have been cleared, we can re_set
- our breakpoints without risking it using stale data. */
- if ((add_flags & SYMFILE_DEFER_BP_RESET) == 0)
- breakpoint_re_set ();
- }
- /* OVERLAYS:
- The following code implements an abstraction for debugging overlay sections.
- The target model is as follows:
- 1) The gnu linker will permit multiple sections to be mapped into the
- same VMA, each with its own unique LMA (or load address).
- 2) It is assumed that some runtime mechanism exists for mapping the
- sections, one by one, from the load address into the VMA address.
- 3) This code provides a mechanism for gdb to keep track of which
- sections should be considered to be mapped from the VMA to the LMA.
- This information is used for symbol lookup, and memory read/write.
- For instance, if a section has been mapped then its contents
- should be read from the VMA, otherwise from the LMA.
- Two levels of debugger support for overlays are available. One is
- "manual", in which the debugger relies on the user to tell it which
- overlays are currently mapped. This level of support is
- implemented entirely in the core debugger, and the information about
- whether a section is mapped is kept in the objfile->obj_section table.
- The second level of support is "automatic", and is only available if
- the target-specific code provides functionality to read the target's
- overlay mapping table, and translate its contents for the debugger
- (by updating the mapped state information in the obj_section tables).
- The interface is as follows:
- User commands:
- overlay map <name> -- tell gdb to consider this section mapped
- overlay unmap <name> -- tell gdb to consider this section unmapped
- overlay list -- list the sections that GDB thinks are mapped
- overlay read-target -- get the target's state of what's mapped
- overlay off/manual/auto -- set overlay debugging state
- Functional interface:
- find_pc_mapped_section(pc): if the pc is in the range of a mapped
- section, return that section.
- find_pc_overlay(pc): find any overlay section that contains
- the pc, either in its VMA or its LMA
- section_is_mapped(sect): true if overlay is marked as mapped
- section_is_overlay(sect): true if section's VMA != LMA
- pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
- pc_in_unmapped_range(...): true if pc belongs to section's LMA
- sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap
- overlay_mapped_address(...): map an address from section's LMA to VMA
- overlay_unmapped_address(...): map an address from section's VMA to LMA
- symbol_overlayed_address(...): Return a "current" address for symbol:
- either in VMA or LMA depending on whether
- the symbol's section is currently mapped. */
- /* Overlay debugging state: */
- enum overlay_debugging_state overlay_debugging = ovly_off;
- int overlay_cache_invalid = 0; /* True if need to refresh mapped state. */
- /* Function: section_is_overlay (SECTION)
- Returns true if SECTION has VMA not equal to LMA, ie.
- SECTION is loaded at an address different from where it will "run". */
- int
- section_is_overlay (struct obj_section *section)
- {
- if (overlay_debugging && section)
- {
- asection *bfd_section = section->the_bfd_section;
- if (bfd_section_lma (bfd_section) != 0
- && bfd_section_lma (bfd_section) != bfd_section_vma (bfd_section))
- return 1;
- }
- return 0;
- }
- /* Function: overlay_invalidate_all (void)
- Invalidate the mapped state of all overlay sections (mark it as stale). */
- static void
- overlay_invalidate_all (void)
- {
- struct obj_section *sect;
- for (objfile *objfile : current_program_space->objfiles ())
- ALL_OBJFILE_OSECTIONS (objfile, sect)
- if (section_is_overlay (sect))
- sect->ovly_mapped = -1;
- }
- /* Function: section_is_mapped (SECTION)
- Returns true if section is an overlay, and is currently mapped.
- Access to the ovly_mapped flag is restricted to this function, so
- that we can do automatic update. If the global flag
- OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
- overlay_invalidate_all. If the mapped state of the particular
- section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
- int
- section_is_mapped (struct obj_section *osect)
- {
- struct gdbarch *gdbarch;
- if (osect == 0 || !section_is_overlay (osect))
- return 0;
- switch (overlay_debugging)
- {
- default:
- case ovly_off:
- return 0; /* overlay debugging off */
- case ovly_auto: /* overlay debugging automatic */
- /* Unles there is a gdbarch_overlay_update function,
- there's really nothing useful to do here (can't really go auto). */
- gdbarch = osect->objfile->arch ();
- if (gdbarch_overlay_update_p (gdbarch))
- {
- if (overlay_cache_invalid)
- {
- overlay_invalidate_all ();
- overlay_cache_invalid = 0;
- }
- if (osect->ovly_mapped == -1)
- gdbarch_overlay_update (gdbarch, osect);
- }
- /* fall thru */
- case ovly_on: /* overlay debugging manual */
- return osect->ovly_mapped == 1;
- }
- }
- /* Function: pc_in_unmapped_range
- If PC falls into the lma range of SECTION, return true, else false. */
- CORE_ADDR
- pc_in_unmapped_range (CORE_ADDR pc, struct obj_section *section)
- {
- if (section_is_overlay (section))
- {
- asection *bfd_section = section->the_bfd_section;
- /* We assume the LMA is relocated by the same offset as the VMA. */
- bfd_vma size = bfd_section_size (bfd_section);
- CORE_ADDR offset = section->offset ();
- if (bfd_section_lma (bfd_section) + offset <= pc
- && pc < bfd_section_lma (bfd_section) + offset + size)
- return 1;
- }
- return 0;
- }
- /* Function: pc_in_mapped_range
- If PC falls into the vma range of SECTION, return true, else false. */
- CORE_ADDR
- pc_in_mapped_range (CORE_ADDR pc, struct obj_section *section)
- {
- if (section_is_overlay (section))
- {
- if (section->addr () <= pc
- && pc < section->endaddr ())
- return 1;
- }
- return 0;
- }
- /* Return true if the mapped ranges of sections A and B overlap, false
- otherwise. */
- static int
- sections_overlap (struct obj_section *a, struct obj_section *b)
- {
- CORE_ADDR a_start = a->addr ();
- CORE_ADDR a_end = a->endaddr ();
- CORE_ADDR b_start = b->addr ();
- CORE_ADDR b_end = b->endaddr ();
- return (a_start < b_end && b_start < a_end);
- }
- /* Function: overlay_unmapped_address (PC, SECTION)
- Returns the address corresponding to PC in the unmapped (load) range.
- May be the same as PC. */
- CORE_ADDR
- overlay_unmapped_address (CORE_ADDR pc, struct obj_section *section)
- {
- if (section_is_overlay (section) && pc_in_mapped_range (pc, section))
- {
- asection *bfd_section = section->the_bfd_section;
- return (pc + bfd_section_lma (bfd_section)
- - bfd_section_vma (bfd_section));
- }
- return pc;
- }
- /* Function: overlay_mapped_address (PC, SECTION)
- Returns the address corresponding to PC in the mapped (runtime) range.
- May be the same as PC. */
- CORE_ADDR
- overlay_mapped_address (CORE_ADDR pc, struct obj_section *section)
- {
- if (section_is_overlay (section) && pc_in_unmapped_range (pc, section))
- {
- asection *bfd_section = section->the_bfd_section;
- return (pc + bfd_section_vma (bfd_section)
- - bfd_section_lma (bfd_section));
- }
- return pc;
- }
- /* Function: symbol_overlayed_address
- Return one of two addresses (relative to the VMA or to the LMA),
- depending on whether the section is mapped or not. */
- CORE_ADDR
- symbol_overlayed_address (CORE_ADDR address, struct obj_section *section)
- {
- if (overlay_debugging)
- {
- /* If the symbol has no section, just return its regular address. */
- if (section == 0)
- return address;
- /* If the symbol's section is not an overlay, just return its
- address. */
- if (!section_is_overlay (section))
- return address;
- /* If the symbol's section is mapped, just return its address. */
- if (section_is_mapped (section))
- return address;
- /*
- * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
- * then return its LOADED address rather than its vma address!!
- */
- return overlay_unmapped_address (address, section);
- }
- return address;
- }
- /* Function: find_pc_overlay (PC)
- Return the best-match overlay section for PC:
- If PC matches a mapped overlay section's VMA, return that section.
- Else if PC matches an unmapped section's VMA, return that section.
- Else if PC matches an unmapped section's LMA, return that section. */
- struct obj_section *
- find_pc_overlay (CORE_ADDR pc)
- {
- struct obj_section *osect, *best_match = NULL;
- if (overlay_debugging)
- {
- for (objfile *objfile : current_program_space->objfiles ())
- ALL_OBJFILE_OSECTIONS (objfile, osect)
- if (section_is_overlay (osect))
- {
- if (pc_in_mapped_range (pc, osect))
- {
- if (section_is_mapped (osect))
- return osect;
- else
- best_match = osect;
- }
- else if (pc_in_unmapped_range (pc, osect))
- best_match = osect;
- }
- }
- return best_match;
- }
- /* Function: find_pc_mapped_section (PC)
- If PC falls into the VMA address range of an overlay section that is
- currently marked as MAPPED, return that section. Else return NULL. */
- struct obj_section *
- find_pc_mapped_section (CORE_ADDR pc)
- {
- struct obj_section *osect;
- if (overlay_debugging)
- {
- for (objfile *objfile : current_program_space->objfiles ())
- ALL_OBJFILE_OSECTIONS (objfile, osect)
- if (pc_in_mapped_range (pc, osect) && section_is_mapped (osect))
- return osect;
- }
- return NULL;
- }
- /* Function: list_overlays_command
- Print a list of mapped sections and their PC ranges. */
- static void
- list_overlays_command (const char *args, int from_tty)
- {
- int nmapped = 0;
- struct obj_section *osect;
- if (overlay_debugging)
- {
- for (objfile *objfile : current_program_space->objfiles ())
- ALL_OBJFILE_OSECTIONS (objfile, osect)
- if (section_is_mapped (osect))
- {
- struct gdbarch *gdbarch = objfile->arch ();
- const char *name;
- bfd_vma lma, vma;
- int size;
- vma = bfd_section_vma (osect->the_bfd_section);
- lma = bfd_section_lma (osect->the_bfd_section);
- size = bfd_section_size (osect->the_bfd_section);
- name = bfd_section_name (osect->the_bfd_section);
- gdb_printf ("Section %s, loaded at ", name);
- gdb_puts (paddress (gdbarch, lma));
- gdb_puts (" - ");
- gdb_puts (paddress (gdbarch, lma + size));
- gdb_printf (", mapped at ");
- gdb_puts (paddress (gdbarch, vma));
- gdb_puts (" - ");
- gdb_puts (paddress (gdbarch, vma + size));
- gdb_puts ("\n");
- nmapped++;
- }
- }
- if (nmapped == 0)
- gdb_printf (_("No sections are mapped.\n"));
- }
- /* Function: map_overlay_command
- Mark the named section as mapped (ie. residing at its VMA address). */
- static void
- map_overlay_command (const char *args, int from_tty)
- {
- struct obj_section *sec, *sec2;
- if (!overlay_debugging)
- error (_("Overlay debugging not enabled. Use "
- "either the 'overlay auto' or\n"
- "the 'overlay manual' command."));
- if (args == 0 || *args == 0)
- error (_("Argument required: name of an overlay section"));
- /* First, find a section matching the user supplied argument. */
- for (objfile *obj_file : current_program_space->objfiles ())
- ALL_OBJFILE_OSECTIONS (obj_file, sec)
- if (!strcmp (bfd_section_name (sec->the_bfd_section), args))
- {
- /* Now, check to see if the section is an overlay. */
- if (!section_is_overlay (sec))
- continue; /* not an overlay section */
- /* Mark the overlay as "mapped". */
- sec->ovly_mapped = 1;
- /* Next, make a pass and unmap any sections that are
- overlapped by this new section: */
- for (objfile *objfile2 : current_program_space->objfiles ())
- ALL_OBJFILE_OSECTIONS (objfile2, sec2)
- if (sec2->ovly_mapped && sec != sec2 && sections_overlap (sec,
- sec2))
- {
- if (info_verbose)
- gdb_printf (_("Note: section %s unmapped by overlap\n"),
- bfd_section_name (sec2->the_bfd_section));
- sec2->ovly_mapped = 0; /* sec2 overlaps sec: unmap sec2. */
- }
- return;
- }
- error (_("No overlay section called %s"), args);
- }
- /* Function: unmap_overlay_command
- Mark the overlay section as unmapped
- (ie. resident in its LMA address range, rather than the VMA range). */
- static void
- unmap_overlay_command (const char *args, int from_tty)
- {
- struct obj_section *sec = NULL;
- if (!overlay_debugging)
- error (_("Overlay debugging not enabled. "
- "Use either the 'overlay auto' or\n"
- "the 'overlay manual' command."));
- if (args == 0 || *args == 0)
- error (_("Argument required: name of an overlay section"));
- /* First, find a section matching the user supplied argument. */
- for (objfile *objfile : current_program_space->objfiles ())
- ALL_OBJFILE_OSECTIONS (objfile, sec)
- if (!strcmp (bfd_section_name (sec->the_bfd_section), args))
- {
- if (!sec->ovly_mapped)
- error (_("Section %s is not mapped"), args);
- sec->ovly_mapped = 0;
- return;
- }
- error (_("No overlay section called %s"), args);
- }
- /* Function: overlay_auto_command
- A utility command to turn on overlay debugging.
- Possibly this should be done via a set/show command. */
- static void
- overlay_auto_command (const char *args, int from_tty)
- {
- overlay_debugging = ovly_auto;
- enable_overlay_breakpoints ();
- if (info_verbose)
- gdb_printf (_("Automatic overlay debugging enabled."));
- }
- /* Function: overlay_manual_command
- A utility command to turn on overlay debugging.
- Possibly this should be done via a set/show command. */
- static void
- overlay_manual_command (const char *args, int from_tty)
- {
- overlay_debugging = ovly_on;
- disable_overlay_breakpoints ();
- if (info_verbose)
- gdb_printf (_("Overlay debugging enabled."));
- }
- /* Function: overlay_off_command
- A utility command to turn on overlay debugging.
- Possibly this should be done via a set/show command. */
- static void
- overlay_off_command (const char *args, int from_tty)
- {
- overlay_debugging = ovly_off;
- disable_overlay_breakpoints ();
- if (info_verbose)
- gdb_printf (_("Overlay debugging disabled."));
- }
- static void
- overlay_load_command (const char *args, int from_tty)
- {
- struct gdbarch *gdbarch = get_current_arch ();
- if (gdbarch_overlay_update_p (gdbarch))
- gdbarch_overlay_update (gdbarch, NULL);
- else
- error (_("This target does not know how to read its overlay state."));
- }
- /* Command list chain containing all defined "overlay" subcommands. */
- static struct cmd_list_element *overlaylist;
- /* Target Overlays for the "Simplest" overlay manager:
- This is GDB's default target overlay layer. It works with the
- minimal overlay manager supplied as an example by Cygnus. The
- entry point is via a function pointer "gdbarch_overlay_update",
- so targets that use a different runtime overlay manager can
- substitute their own overlay_update function and take over the
- function pointer.
- The overlay_update function pokes around in the target's data structures
- to see what overlays are mapped, and updates GDB's overlay mapping with
- this information.
- In this simple implementation, the target data structures are as follows:
- unsigned _novlys; /# number of overlay sections #/
- unsigned _ovly_table[_novlys][4] = {
- {VMA, OSIZE, LMA, MAPPED}, /# one entry per overlay section #/
- {..., ..., ..., ...},
- }
- unsigned _novly_regions; /# number of overlay regions #/
- unsigned _ovly_region_table[_novly_regions][3] = {
- {VMA, OSIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
- {..., ..., ...},
- }
- These functions will attempt to update GDB's mappedness state in the
- symbol section table, based on the target's mappedness state.
- To do this, we keep a cached copy of the target's _ovly_table, and
- attempt to detect when the cached copy is invalidated. The main
- entry point is "simple_overlay_update(SECT), which looks up SECT in
- the cached table and re-reads only the entry for that section from
- the target (whenever possible). */
- /* Cached, dynamically allocated copies of the target data structures: */
- static unsigned (*cache_ovly_table)[4] = 0;
- static unsigned cache_novlys = 0;
- static CORE_ADDR cache_ovly_table_base = 0;
- enum ovly_index
- {
- VMA, OSIZE, LMA, MAPPED
- };
- /* Throw away the cached copy of _ovly_table. */
- static void
- simple_free_overlay_table (void)
- {
- xfree (cache_ovly_table);
- cache_novlys = 0;
- cache_ovly_table = NULL;
- cache_ovly_table_base = 0;
- }
- /* Read an array of ints of size SIZE from the target into a local buffer.
- Convert to host order. int LEN is number of ints. */
- static void
- read_target_long_array (CORE_ADDR memaddr, unsigned int *myaddr,
- int len, int size, enum bfd_endian byte_order)
- {
- /* FIXME (alloca): Not safe if array is very large. */
- gdb_byte *buf = (gdb_byte *) alloca (len * size);
- int i;
- read_memory (memaddr, buf, len * size);
- for (i = 0; i < len; i++)
- myaddr[i] = extract_unsigned_integer (size * i + buf, size, byte_order);
- }
- /* Find and grab a copy of the target _ovly_table
- (and _novlys, which is needed for the table's size). */
- static int
- simple_read_overlay_table (void)
- {
- struct bound_minimal_symbol novlys_msym;
- struct bound_minimal_symbol ovly_table_msym;
- struct gdbarch *gdbarch;
- int word_size;
- enum bfd_endian byte_order;
- simple_free_overlay_table ();
- novlys_msym = lookup_minimal_symbol ("_novlys", NULL, NULL);
- if (! novlys_msym.minsym)
- {
- error (_("Error reading inferior's overlay table: "
- "couldn't find `_novlys' variable\n"
- "in inferior. Use `overlay manual' mode."));
- return 0;
- }
- ovly_table_msym = lookup_bound_minimal_symbol ("_ovly_table");
- if (! ovly_table_msym.minsym)
- {
- error (_("Error reading inferior's overlay table: couldn't find "
- "`_ovly_table' array\n"
- "in inferior. Use `overlay manual' mode."));
- return 0;
- }
- gdbarch = ovly_table_msym.objfile->arch ();
- word_size = gdbarch_long_bit (gdbarch) / TARGET_CHAR_BIT;
- byte_order = gdbarch_byte_order (gdbarch);
- cache_novlys = read_memory_integer (BMSYMBOL_VALUE_ADDRESS (novlys_msym),
- 4, byte_order);
- cache_ovly_table
- = (unsigned int (*)[4]) xmalloc (cache_novlys * sizeof (*cache_ovly_table));
- cache_ovly_table_base = BMSYMBOL_VALUE_ADDRESS (ovly_table_msym);
- read_target_long_array (cache_ovly_table_base,
- (unsigned int *) cache_ovly_table,
- cache_novlys * 4, word_size, byte_order);
- return 1; /* SUCCESS */
- }
- /* Function: simple_overlay_update_1
- A helper function for simple_overlay_update. Assuming a cached copy
- of _ovly_table exists, look through it to find an entry whose vma,
- lma and size match those of OSECT. Re-read the entry and make sure
- it still matches OSECT (else the table may no longer be valid).
- Set OSECT's mapped state to match the entry. Return: 1 for
- success, 0 for failure. */
- static int
- simple_overlay_update_1 (struct obj_section *osect)
- {
- int i;
- asection *bsect = osect->the_bfd_section;
- struct gdbarch *gdbarch = osect->objfile->arch ();
- int word_size = gdbarch_long_bit (gdbarch) / TARGET_CHAR_BIT;
- enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
- for (i = 0; i < cache_novlys; i++)
- if (cache_ovly_table[i][VMA] == bfd_section_vma (bsect)
- && cache_ovly_table[i][LMA] == bfd_section_lma (bsect))
- {
- read_target_long_array (cache_ovly_table_base + i * word_size,
- (unsigned int *) cache_ovly_table[i],
- 4, word_size, byte_order);
- if (cache_ovly_table[i][VMA] == bfd_section_vma (bsect)
- && cache_ovly_table[i][LMA] == bfd_section_lma (bsect))
- {
- osect->ovly_mapped = cache_ovly_table[i][MAPPED];
- return 1;
- }
- else /* Warning! Warning! Target's ovly table has changed! */
- return 0;
- }
- return 0;
- }
- /* Function: simple_overlay_update
- If OSECT is NULL, then update all sections' mapped state
- (after re-reading the entire target _ovly_table).
- If OSECT is non-NULL, then try to find a matching entry in the
- cached ovly_table and update only OSECT's mapped state.
- If a cached entry can't be found or the cache isn't valid, then
- re-read the entire cache, and go ahead and update all sections. */
- void
- simple_overlay_update (struct obj_section *osect)
- {
- /* Were we given an osect to look up? NULL means do all of them. */
- if (osect)
- /* Have we got a cached copy of the target's overlay table? */
- if (cache_ovly_table != NULL)
- {
- /* Does its cached location match what's currently in the
- symtab? */
- struct bound_minimal_symbol minsym
- = lookup_minimal_symbol ("_ovly_table", NULL, NULL);
- if (minsym.minsym == NULL)
- error (_("Error reading inferior's overlay table: couldn't "
- "find `_ovly_table' array\n"
- "in inferior. Use `overlay manual' mode."));
-
- if (cache_ovly_table_base == BMSYMBOL_VALUE_ADDRESS (minsym))
- /* Then go ahead and try to look up this single section in
- the cache. */
- if (simple_overlay_update_1 (osect))
- /* Found it! We're done. */
- return;
- }
- /* Cached table no good: need to read the entire table anew.
- Or else we want all the sections, in which case it's actually
- more efficient to read the whole table in one block anyway. */
- if (! simple_read_overlay_table ())
- return;
- /* Now may as well update all sections, even if only one was requested. */
- for (objfile *objfile : current_program_space->objfiles ())
- ALL_OBJFILE_OSECTIONS (objfile, osect)
- if (section_is_overlay (osect))
- {
- int i;
- asection *bsect = osect->the_bfd_section;
- for (i = 0; i < cache_novlys; i++)
- if (cache_ovly_table[i][VMA] == bfd_section_vma (bsect)
- && cache_ovly_table[i][LMA] == bfd_section_lma (bsect))
- { /* obj_section matches i'th entry in ovly_table. */
- osect->ovly_mapped = cache_ovly_table[i][MAPPED];
- break; /* finished with inner for loop: break out. */
- }
- }
- }
- /* Default implementation for sym_relocate. */
- bfd_byte *
- default_symfile_relocate (struct objfile *objfile, asection *sectp,
- bfd_byte *buf)
- {
- /* Use sectp->owner instead of objfile->obfd. sectp may point to a
- DWO file. */
- bfd *abfd = sectp->owner;
- /* We're only interested in sections with relocation
- information. */
- if ((sectp->flags & SEC_RELOC) == 0)
- return NULL;
- /* We will handle section offsets properly elsewhere, so relocate as if
- all sections begin at 0. */
- for (asection *sect : gdb_bfd_sections (abfd))
- {
- sect->output_section = sect;
- sect->output_offset = 0;
- }
- return bfd_simple_get_relocated_section_contents (abfd, sectp, buf, NULL);
- }
- /* Relocate the contents of a debug section SECTP in ABFD. The
- contents are stored in BUF if it is non-NULL, or returned in a
- malloc'd buffer otherwise.
- For some platforms and debug info formats, shared libraries contain
- relocations against the debug sections (particularly for DWARF-2;
- one affected platform is PowerPC GNU/Linux, although it depends on
- the version of the linker in use). Also, ELF object files naturally
- have unresolved relocations for their debug sections. We need to apply
- the relocations in order to get the locations of symbols correct.
- Another example that may require relocation processing, is the
- DWARF-2 .eh_frame section in .o files, although it isn't strictly a
- debug section. */
- bfd_byte *
- symfile_relocate_debug_section (struct objfile *objfile,
- asection *sectp, bfd_byte *buf)
- {
- gdb_assert (objfile->sf->sym_relocate);
- return (*objfile->sf->sym_relocate) (objfile, sectp, buf);
- }
- symfile_segment_data_up
- get_symfile_segment_data (bfd *abfd)
- {
- const struct sym_fns *sf = find_sym_fns (abfd);
- if (sf == NULL)
- return NULL;
- return sf->sym_segments (abfd);
- }
- /* Given:
- - DATA, containing segment addresses from the object file ABFD, and
- the mapping from ABFD's sections onto the segments that own them,
- and
- - SEGMENT_BASES[0 .. NUM_SEGMENT_BASES - 1], holding the actual
- segment addresses reported by the target,
- store the appropriate offsets for each section in OFFSETS.
- If there are fewer entries in SEGMENT_BASES than there are segments
- in DATA, then apply SEGMENT_BASES' last entry to all the segments.
- If there are more entries, then ignore the extra. The target may
- not be able to distinguish between an empty data segment and a
- missing data segment; a missing text segment is less plausible. */
- int
- symfile_map_offsets_to_segments (bfd *abfd,
- const struct symfile_segment_data *data,
- section_offsets &offsets,
- int num_segment_bases,
- const CORE_ADDR *segment_bases)
- {
- int i;
- asection *sect;
- /* It doesn't make sense to call this function unless you have some
- segment base addresses. */
- gdb_assert (num_segment_bases > 0);
- /* If we do not have segment mappings for the object file, we
- can not relocate it by segments. */
- gdb_assert (data != NULL);
- gdb_assert (data->segments.size () > 0);
- for (i = 0, sect = abfd->sections; sect != NULL; i++, sect = sect->next)
- {
- int which = data->segment_info[i];
- gdb_assert (0 <= which && which <= data->segments.size ());
- /* Don't bother computing offsets for sections that aren't
- loaded as part of any segment. */
- if (! which)
- continue;
- /* Use the last SEGMENT_BASES entry as the address of any extra
- segments mentioned in DATA->segment_info. */
- if (which > num_segment_bases)
- which = num_segment_bases;
- offsets[i] = segment_bases[which - 1] - data->segments[which - 1].base;
- }
- return 1;
- }
- static void
- symfile_find_segment_sections (struct objfile *objfile)
- {
- bfd *abfd = objfile->obfd;
- int i;
- asection *sect;
- symfile_segment_data_up data
- = get_symfile_segment_data (objfile->obfd);
- if (data == NULL)
- return;
- if (data->segments.size () != 1 && data->segments.size () != 2)
- return;
- for (i = 0, sect = abfd->sections; sect != NULL; i++, sect = sect->next)
- {
- int which = data->segment_info[i];
- if (which == 1)
- {
- if (objfile->sect_index_text == -1)
- objfile->sect_index_text = sect->index;
- if (objfile->sect_index_rodata == -1)
- objfile->sect_index_rodata = sect->index;
- }
- else if (which == 2)
- {
- if (objfile->sect_index_data == -1)
- objfile->sect_index_data = sect->index;
- if (objfile->sect_index_bss == -1)
- objfile->sect_index_bss = sect->index;
- }
- }
- }
- /* Listen for free_objfile events. */
- static void
- symfile_free_objfile (struct objfile *objfile)
- {
- /* Remove the target sections owned by this objfile. */
- if (objfile != NULL)
- current_program_space->remove_target_sections ((void *) objfile);
- }
- /* Wrapper around the quick_symbol_functions expand_symtabs_matching "method".
- Expand all symtabs that match the specified criteria.
- See quick_symbol_functions.expand_symtabs_matching for details. */
- bool
- expand_symtabs_matching
- (gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher,
- const lookup_name_info &lookup_name,
- gdb::function_view<expand_symtabs_symbol_matcher_ftype> symbol_matcher,
- gdb::function_view<expand_symtabs_exp_notify_ftype> expansion_notify,
- block_search_flags search_flags,
- enum search_domain kind)
- {
- for (objfile *objfile : current_program_space->objfiles ())
- if (!objfile->expand_symtabs_matching (file_matcher,
- &lookup_name,
- symbol_matcher,
- expansion_notify,
- search_flags,
- UNDEF_DOMAIN,
- kind))
- return false;
- return true;
- }
- /* Wrapper around the quick_symbol_functions map_symbol_filenames "method".
- Map function FUN over every file.
- See quick_symbol_functions.map_symbol_filenames for details. */
- void
- map_symbol_filenames (gdb::function_view<symbol_filename_ftype> fun,
- bool need_fullname)
- {
- for (objfile *objfile : current_program_space->objfiles ())
- objfile->map_symbol_filenames (fun, need_fullname);
- }
- #if GDB_SELF_TEST
- namespace selftests {
- namespace filename_language {
- static void test_filename_language ()
- {
- /* This test messes up the filename_language_table global. */
- scoped_restore restore_flt = make_scoped_restore (&filename_language_table);
- /* Test deducing an unknown extension. */
- language lang = deduce_language_from_filename ("myfile.blah");
- SELF_CHECK (lang == language_unknown);
- /* Test deducing a known extension. */
- lang = deduce_language_from_filename ("myfile.c");
- SELF_CHECK (lang == language_c);
- /* Test adding a new extension using the internal API. */
- add_filename_language (".blah", language_pascal);
- lang = deduce_language_from_filename ("myfile.blah");
- SELF_CHECK (lang == language_pascal);
- }
- static void
- test_set_ext_lang_command ()
- {
- /* This test messes up the filename_language_table global. */
- scoped_restore restore_flt = make_scoped_restore (&filename_language_table);
- /* Confirm that the .hello extension is not known. */
- language lang = deduce_language_from_filename ("cake.hello");
- SELF_CHECK (lang == language_unknown);
- /* Test adding a new extension using the CLI command. */
- ext_args = ".hello rust";
- set_ext_lang_command (NULL, 1, NULL);
- lang = deduce_language_from_filename ("cake.hello");
- SELF_CHECK (lang == language_rust);
- /* Test overriding an existing extension using the CLI command. */
- int size_before = filename_language_table.size ();
- ext_args = ".hello pascal";
- set_ext_lang_command (NULL, 1, NULL);
- int size_after = filename_language_table.size ();
- lang = deduce_language_from_filename ("cake.hello");
- SELF_CHECK (lang == language_pascal);
- SELF_CHECK (size_before == size_after);
- }
- } /* namespace filename_language */
- } /* namespace selftests */
- #endif /* GDB_SELF_TEST */
- void _initialize_symfile ();
- void
- _initialize_symfile ()
- {
- struct cmd_list_element *c;
- gdb::observers::free_objfile.attach (symfile_free_objfile, "symfile");
- #define READNOW_READNEVER_HELP \
- "The '-readnow' option will cause GDB to read the entire symbol file\n\
- immediately. This makes the command slower, but may make future operations\n\
- faster.\n\
- The '-readnever' option will prevent GDB from reading the symbol file's\n\
- symbolic debug information."
- c = add_cmd ("symbol-file", class_files, symbol_file_command, _("\
- Load symbol table from executable file FILE.\n\
- Usage: symbol-file [-readnow | -readnever] [-o OFF] FILE\n\
- OFF is an optional offset which is added to each section address.\n\
- The `file' command can also load symbol tables, as well as setting the file\n\
- to execute.\n" READNOW_READNEVER_HELP), &cmdlist);
- set_cmd_completer (c, filename_completer);
- c = add_cmd ("add-symbol-file", class_files, add_symbol_file_command, _("\
- Load symbols from FILE, assuming FILE has been dynamically loaded.\n\
- Usage: add-symbol-file FILE [-readnow | -readnever] [-o OFF] [ADDR] \
- [-s SECT-NAME SECT-ADDR]...\n\
- ADDR is the starting address of the file's text.\n\
- Each '-s' argument provides a section name and address, and\n\
- should be specified if the data and bss segments are not contiguous\n\
- with the text. SECT-NAME is a section name to be loaded at SECT-ADDR.\n\
- OFF is an optional offset which is added to the default load addresses\n\
- of all sections for which no other address was specified.\n"
- READNOW_READNEVER_HELP),
- &cmdlist);
- set_cmd_completer (c, filename_completer);
- c = add_cmd ("remove-symbol-file", class_files,
- remove_symbol_file_command, _("\
- Remove a symbol file added via the add-symbol-file command.\n\
- Usage: remove-symbol-file FILENAME\n\
- remove-symbol-file -a ADDRESS\n\
- The file to remove can be identified by its filename or by an address\n\
- that lies within the boundaries of this symbol file in memory."),
- &cmdlist);
- c = add_cmd ("load", class_files, load_command, _("\
- Dynamically load FILE into the running program.\n\
- FILE symbols are recorded for access from GDB.\n\
- Usage: load [FILE] [OFFSET]\n\
- An optional load OFFSET may also be given as a literal address.\n\
- When OFFSET is provided, FILE must also be provided. FILE can be provided\n\
- on its own."), &cmdlist);
- set_cmd_completer (c, filename_completer);
- cmd_list_element *overlay_cmd
- = add_basic_prefix_cmd ("overlay", class_support,
- _("Commands for debugging overlays."), &overlaylist,
- 0, &cmdlist);
- add_com_alias ("ovly", overlay_cmd, class_support, 1);
- add_com_alias ("ov", overlay_cmd, class_support, 1);
- add_cmd ("map-overlay", class_support, map_overlay_command,
- _("Assert that an overlay section is mapped."), &overlaylist);
- add_cmd ("unmap-overlay", class_support, unmap_overlay_command,
- _("Assert that an overlay section is unmapped."), &overlaylist);
- add_cmd ("list-overlays", class_support, list_overlays_command,
- _("List mappings of overlay sections."), &overlaylist);
- add_cmd ("manual", class_support, overlay_manual_command,
- _("Enable overlay debugging."), &overlaylist);
- add_cmd ("off", class_support, overlay_off_command,
- _("Disable overlay debugging."), &overlaylist);
- add_cmd ("auto", class_support, overlay_auto_command,
- _("Enable automatic overlay debugging."), &overlaylist);
- add_cmd ("load-target", class_support, overlay_load_command,
- _("Read the overlay mapping state from the target."), &overlaylist);
- /* Filename extension to source language lookup table: */
- add_setshow_string_noescape_cmd ("extension-language", class_files,
- &ext_args, _("\
- Set mapping between filename extension and source language."), _("\
- Show mapping between filename extension and source language."), _("\
- Usage: set extension-language .foo bar"),
- set_ext_lang_command,
- show_ext_args,
- &setlist, &showlist);
- add_info ("extensions", info_ext_lang_command,
- _("All filename extensions associated with a source language."));
- add_setshow_optional_filename_cmd ("debug-file-directory", class_support,
- &debug_file_directory, _("\
- Set the directories where separate debug symbols are searched for."), _("\
- Show the directories where separate debug symbols are searched for."), _("\
- Separate debug symbols are first searched for in the same\n\
- directory as the binary, then in the `" DEBUG_SUBDIRECTORY "' subdirectory,\n\
- and lastly at the path of the directory of the binary with\n\
- each global debug-file-directory component prepended."),
- NULL,
- show_debug_file_directory,
- &setlist, &showlist);
- add_setshow_enum_cmd ("symbol-loading", no_class,
- print_symbol_loading_enums, &print_symbol_loading,
- _("\
- Set printing of symbol loading messages."), _("\
- Show printing of symbol loading messages."), _("\
- off == turn all messages off\n\
- brief == print messages for the executable,\n\
- and brief messages for shared libraries\n\
- full == print messages for the executable,\n\
- and messages for each shared library."),
- NULL,
- NULL,
- &setprintlist, &showprintlist);
- add_setshow_boolean_cmd ("separate-debug-file", no_class,
- &separate_debug_file_debug, _("\
- Set printing of separate debug info file search debug."), _("\
- Show printing of separate debug info file search debug."), _("\
- When on, GDB prints the searched locations while looking for separate debug \
- info files."), NULL, NULL, &setdebuglist, &showdebuglist);
- #if GDB_SELF_TEST
- selftests::register_test
- ("filename_language", selftests::filename_language::test_filename_language);
- selftests::register_test
- ("set_ext_lang_command",
- selftests::filename_language::test_set_ext_lang_command);
- #endif
- }
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