| /* Generic symbol file reading for the GNU debugger, GDB. |
| |
| Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, |
| 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 |
| 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 "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" /* for write_pc */ |
| #include "filenames.h" /* for DOSish file names */ |
| #include "gdb-stabs.h" |
| #include "gdb_obstack.h" |
| #include "completer.h" |
| #include "bcache.h" |
| #include "hashtab.h" |
| #include "readline/readline.h" |
| #include "gdb_assert.h" |
| #include "block.h" |
| #include "observer.h" |
| #include "exec.h" |
| #include "parser-defs.h" |
| #include "varobj.h" |
| #include "elf-bfd.h" |
| #include "solib.h" |
| |
| #include <sys/types.h> |
| #include <fcntl.h> |
| #include "gdb_string.h" |
| #include "gdb_stat.h" |
| #include <ctype.h> |
| #include <time.h> |
| #include <sys/time.h> |
| |
| |
| 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); |
| |
| static void clear_symtab_users_cleanup (void *ignore); |
| |
| /* Global variables owned by this file */ |
| int readnow_symbol_files; /* Read full symbols immediately */ |
| |
| /* External variables and functions referenced. */ |
| |
| extern void report_transfer_performance (unsigned long, time_t, time_t); |
| |
| /* Functions this file defines */ |
| |
| #if 0 |
| static int simple_read_overlay_region_table (void); |
| static void simple_free_overlay_region_table (void); |
| #endif |
| |
| static void load_command (char *, int); |
| |
| static void symbol_file_add_main_1 (char *args, int from_tty, int flags); |
| |
| static void add_symbol_file_command (char *, int); |
| |
| static void add_shared_symbol_files_command (char *, int); |
| |
| static void reread_separate_symbols (struct objfile *objfile); |
| |
| static void cashier_psymtab (struct partial_symtab *); |
| |
| bfd *symfile_bfd_open (char *); |
| |
| int get_section_index (struct objfile *, char *); |
| |
| static struct sym_fns *find_sym_fns (bfd *); |
| |
| static void decrement_reading_symtab (void *); |
| |
| static void overlay_invalidate_all (void); |
| |
| static int overlay_is_mapped (struct obj_section *); |
| |
| void list_overlays_command (char *, int); |
| |
| void map_overlay_command (char *, int); |
| |
| void unmap_overlay_command (char *, int); |
| |
| static void overlay_auto_command (char *, int); |
| |
| static void overlay_manual_command (char *, int); |
| |
| static void overlay_off_command (char *, int); |
| |
| static void overlay_load_command (char *, int); |
| |
| static void overlay_command (char *, int); |
| |
| static void simple_free_overlay_table (void); |
| |
| static void read_target_long_array (CORE_ADDR, unsigned int *, int); |
| |
| static int simple_read_overlay_table (void); |
| |
| static int simple_overlay_update_1 (struct obj_section *); |
| |
| static void add_filename_language (char *ext, enum language lang); |
| |
| static void info_ext_lang_command (char *args, int from_tty); |
| |
| static char *find_separate_debug_file (struct objfile *objfile); |
| |
| static void init_filename_language_table (void); |
| |
| static void symfile_find_segment_sections (struct objfile *objfile); |
| |
| void _initialize_symfile (void); |
| |
| /* 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. */ |
| |
| static struct sym_fns *symtab_fns = NULL; |
| |
| /* Flag for whether user will be reloading symbols multiple times. |
| Defaults to ON for VxWorks, otherwise OFF. */ |
| |
| #ifdef SYMBOL_RELOADING_DEFAULT |
| int symbol_reloading = SYMBOL_RELOADING_DEFAULT; |
| #else |
| int symbol_reloading = 0; |
| #endif |
| static void |
| show_symbol_reloading (struct ui_file *file, int from_tty, |
| struct cmd_list_element *c, const char *value) |
| { |
| fprintf_filtered (file, _("\ |
| Dynamic symbol table reloading multiple times in one run is %s.\n"), |
| value); |
| } |
| |
| |
| /* If non-zero, shared library symbols will be added automatically |
| when the inferior is created, new libraries are loaded, or when |
| attaching to the inferior. This is almost always what users will |
| want to have happen; but for very large programs, the startup time |
| will be excessive, and so if this is a problem, the user can clear |
| this flag and then add the shared library symbols as needed. Note |
| that there is a potential for confusion, since if the shared |
| library symbols are not loaded, commands like "info fun" will *not* |
| report all the functions that are actually present. */ |
| |
| int auto_solib_add = 1; |
| |
| /* For systems that support it, a threshold size in megabytes. If |
| automatically adding a new library's symbol table to those already |
| known to the debugger would cause the total shared library symbol |
| size to exceed this threshhold, then the shlib's symbols are not |
| added. The threshold is ignored if the user explicitly asks for a |
| shlib to be added, such as when using the "sharedlibrary" |
| command. */ |
| |
| int auto_solib_limit; |
| |
| |
| /* This compares two partial symbols by names, using strcmp_iw_ordered |
| for the comparison. */ |
| |
| static int |
| compare_psymbols (const void *s1p, const void *s2p) |
| { |
| struct partial_symbol *const *s1 = s1p; |
| struct partial_symbol *const *s2 = s2p; |
| |
| return strcmp_iw_ordered (SYMBOL_SEARCH_NAME (*s1), |
| SYMBOL_SEARCH_NAME (*s2)); |
| } |
| |
| void |
| sort_pst_symbols (struct partial_symtab *pst) |
| { |
| /* Sort the global list; don't sort the static list */ |
| |
| qsort (pst->objfile->global_psymbols.list + pst->globals_offset, |
| pst->n_global_syms, sizeof (struct partial_symbol *), |
| compare_psymbols); |
| } |
| |
| /* Make a null terminated copy of the string at PTR with SIZE characters in |
| the obstack pointed to by OBSTACKP . Returns the address of the copy. |
| Note that the string at PTR does not have to be null terminated, I.E. it |
| may be part of a larger string and we are only saving a substring. */ |
| |
| char * |
| obsavestring (const char *ptr, int size, struct obstack *obstackp) |
| { |
| char *p = (char *) obstack_alloc (obstackp, size + 1); |
| /* Open-coded memcpy--saves function call time. These strings are usually |
| short. FIXME: Is this really still true with a compiler that can |
| inline memcpy? */ |
| { |
| const char *p1 = ptr; |
| char *p2 = p; |
| const char *end = ptr + size; |
| while (p1 != end) |
| *p2++ = *p1++; |
| } |
| p[size] = 0; |
| return p; |
| } |
| |
| /* Concatenate strings S1, S2 and S3; return the new string. Space is found |
| in the obstack pointed to by OBSTACKP. */ |
| |
| char * |
| obconcat (struct obstack *obstackp, const char *s1, const char *s2, |
| const char *s3) |
| { |
| int len = strlen (s1) + strlen (s2) + strlen (s3) + 1; |
| char *val = (char *) obstack_alloc (obstackp, len); |
| strcpy (val, s1); |
| strcat (val, s2); |
| strcat (val, s3); |
| return val; |
| } |
| |
| /* True if we are nested inside psymtab_to_symtab. */ |
| |
| int currently_reading_symtab = 0; |
| |
| static void |
| decrement_reading_symtab (void *dummy) |
| { |
| currently_reading_symtab--; |
| } |
| |
| /* Get the symbol table that corresponds to a partial_symtab. |
| This is fast after the first time you do it. In fact, there |
| is an even faster macro PSYMTAB_TO_SYMTAB that does the fast |
| case inline. */ |
| |
| struct symtab * |
| psymtab_to_symtab (struct partial_symtab *pst) |
| { |
| /* If it's been looked up before, return it. */ |
| if (pst->symtab) |
| return pst->symtab; |
| |
| /* If it has not yet been read in, read it. */ |
| if (!pst->readin) |
| { |
| struct cleanup *back_to = make_cleanup (decrement_reading_symtab, NULL); |
| currently_reading_symtab++; |
| (*pst->read_symtab) (pst); |
| do_cleanups (back_to); |
| } |
| |
| return pst->symtab; |
| } |
| |
| /* Remember the lowest-addressed loadable section we've seen. |
| This function is called via bfd_map_over_sections. |
| |
| 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. */ |
| |
| void |
| find_lowest_section (bfd *abfd, asection *sect, void *obj) |
| { |
| asection **lowest = (asection **) obj; |
| |
| if (0 == (bfd_get_section_flags (abfd, sect) & SEC_LOAD)) |
| return; |
| if (!*lowest) |
| *lowest = sect; /* First loadable section */ |
| else if (bfd_section_vma (abfd, *lowest) > bfd_section_vma (abfd, sect)) |
| *lowest = sect; /* A lower loadable section */ |
| else if (bfd_section_vma (abfd, *lowest) == bfd_section_vma (abfd, sect) |
| && (bfd_section_size (abfd, (*lowest)) |
| <= bfd_section_size (abfd, sect))) |
| *lowest = sect; |
| } |
| |
| /* Create a new section_addr_info, with room for NUM_SECTIONS. */ |
| |
| struct section_addr_info * |
| alloc_section_addr_info (size_t num_sections) |
| { |
| struct section_addr_info *sap; |
| size_t size; |
| |
| size = (sizeof (struct section_addr_info) |
| + sizeof (struct other_sections) * (num_sections - 1)); |
| sap = (struct section_addr_info *) xmalloc (size); |
| memset (sap, 0, size); |
| sap->num_sections = num_sections; |
| |
| return sap; |
| } |
| |
| |
| /* Return a freshly allocated copy of ADDRS. The section names, if |
| any, are also freshly allocated copies of those in ADDRS. */ |
| struct section_addr_info * |
| copy_section_addr_info (struct section_addr_info *addrs) |
| { |
| struct section_addr_info *copy |
| = alloc_section_addr_info (addrs->num_sections); |
| int i; |
| |
| copy->num_sections = addrs->num_sections; |
| for (i = 0; i < addrs->num_sections; i++) |
| { |
| copy->other[i].addr = addrs->other[i].addr; |
| if (addrs->other[i].name) |
| copy->other[i].name = xstrdup (addrs->other[i].name); |
| else |
| copy->other[i].name = NULL; |
| copy->other[i].sectindex = addrs->other[i].sectindex; |
| } |
| |
| return copy; |
| } |
| |
| |
| |
| /* Build (allocate and populate) a section_addr_info struct from |
| an existing section table. */ |
| |
| extern struct section_addr_info * |
| build_section_addr_info_from_section_table (const struct section_table *start, |
| const struct section_table *end) |
| { |
| struct section_addr_info *sap; |
| const struct section_table *stp; |
| int oidx; |
| |
| sap = alloc_section_addr_info (end - start); |
| |
| for (stp = start, oidx = 0; stp != end; stp++) |
| { |
| if (bfd_get_section_flags (stp->bfd, |
| stp->the_bfd_section) & (SEC_ALLOC | SEC_LOAD) |
| && oidx < end - start) |
| { |
| sap->other[oidx].addr = stp->addr; |
| sap->other[oidx].name |
| = xstrdup (bfd_section_name (stp->bfd, stp->the_bfd_section)); |
| sap->other[oidx].sectindex = stp->the_bfd_section->index; |
| oidx++; |
| } |
| } |
| |
| return sap; |
| } |
| |
| |
| /* Free all memory allocated by build_section_addr_info_from_section_table. */ |
| |
| extern void |
| free_section_addr_info (struct section_addr_info *sap) |
| { |
| int idx; |
| |
| for (idx = 0; idx < sap->num_sections; idx++) |
| if (sap->other[idx].name) |
| xfree (sap->other[idx].name); |
| xfree (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->num_sections; i++) |
| { |
| if (ANOFFSET (objfile->section_offsets, i) != 0) |
| { |
| break; |
| } |
| } |
| if (i == objfile->num_sections) |
| { |
| 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; |
| } |
| } |
| |
| /* The arguments to place_section. */ |
| |
| struct place_section_arg |
| { |
| struct section_offsets *offsets; |
| CORE_ADDR lowest; |
| }; |
| |
| /* Find a unique offset to use for loadable section SECT if |
| the user did not provide an offset. */ |
| |
| void |
| place_section (bfd *abfd, asection *sect, void *obj) |
| { |
| struct place_section_arg *arg = obj; |
| CORE_ADDR *offsets = arg->offsets->offsets, start_addr; |
| int done; |
| ULONGEST align = ((ULONGEST) 1) << bfd_get_section_alignment (abfd, sect); |
| |
| /* We are only interested in allocated sections. */ |
| if ((bfd_get_section_flags (abfd, sect) & SEC_ALLOC) == 0) |
| return; |
| |
| /* If the user specified an offset, honor it. */ |
| if (offsets[sect->index] != 0) |
| return; |
| |
| /* Otherwise, let's try to find a place for the section. */ |
| start_addr = (arg->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; |
| CORE_ADDR cur_offset; |
| |
| /* We don't need to compare against ourself. */ |
| if (cur_sec == sect) |
| continue; |
| |
| /* We can only conflict with allocated sections. */ |
| if ((bfd_get_section_flags (abfd, 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_get_section_size (sect) > offsets[indx] |
| && start_addr < offsets[indx] + bfd_get_section_size (cur_sec)) |
| { |
| start_addr = offsets[indx] + bfd_get_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[sect->index] = start_addr; |
| arg->lowest = start_addr + bfd_get_section_size (sect); |
| |
| exec_set_section_address (bfd_get_filename (abfd), sect->index, start_addr); |
| } |
| |
| /* 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, |
| struct section_addr_info *addrs) |
| { |
| int i; |
| |
| objfile->num_sections = bfd_count_sections (objfile->obfd); |
| objfile->section_offsets = (struct section_offsets *) |
| obstack_alloc (&objfile->objfile_obstack, |
| SIZEOF_N_SECTION_OFFSETS (objfile->num_sections)); |
| memset (objfile->section_offsets, 0, |
| SIZEOF_N_SECTION_OFFSETS (objfile->num_sections)); |
| |
| /* Now calculate offsets for section that were specified by the |
| caller. */ |
| for (i = 0; i < addrs->num_sections && addrs->other[i].name; i++) |
| { |
| struct other_sections *osp ; |
| |
| osp = &addrs->other[i] ; |
| if (osp->addr == 0) |
| continue; |
| |
| /* Record all sections in offsets */ |
| /* The section_offsets in the objfile are here filled in using |
| the BFD index. */ |
| (objfile->section_offsets)->offsets[osp->sectindex] = osp->addr; |
| } |
| |
| /* 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) |
| { |
| struct place_section_arg arg; |
| bfd *abfd = objfile->obfd; |
| asection *cur_sec; |
| CORE_ADDR lowest = 0; |
| |
| 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 (abfd, cur_sec) != 0) |
| break; |
| |
| if (cur_sec == NULL) |
| { |
| CORE_ADDR *offsets = objfile->section_offsets->offsets; |
| |
| /* Pick non-overlapping offsets for sections the user did not |
| place explicitly. */ |
| arg.offsets = objfile->section_offsets; |
| arg.lowest = 0; |
| bfd_map_over_sections (objfile->obfd, place_section, &arg); |
| |
| /* 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_get_section_flags (abfd, cur_sec) & SEC_ALLOC) == 0) |
| continue; |
| |
| bfd_set_section_vma (abfd, cur_sec, 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. */ |
| |
| struct symfile_segment_data * |
| default_symfile_segments (bfd *abfd) |
| { |
| int num_sections, i; |
| asection *sect; |
| struct symfile_segment_data *data; |
| 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_get_section_flags (abfd, sect) & SEC_ALLOC) == 0) |
| continue; |
| |
| break; |
| } |
| if (sect == NULL) |
| return NULL; |
| |
| low = bfd_get_section_vma (abfd, sect); |
| high = low + bfd_get_section_size (sect); |
| |
| data = XZALLOC (struct symfile_segment_data); |
| data->num_segments = 1; |
| data->segment_bases = XCALLOC (1, CORE_ADDR); |
| data->segment_sizes = XCALLOC (1, CORE_ADDR); |
| |
| num_sections = bfd_count_sections (abfd); |
| data->segment_info = XCALLOC (num_sections, int); |
| |
| for (i = 0, sect = abfd->sections; sect != NULL; i++, sect = sect->next) |
| { |
| CORE_ADDR vma; |
| |
| if ((bfd_get_section_flags (abfd, sect) & SEC_ALLOC) == 0) |
| continue; |
| |
| vma = bfd_get_section_vma (abfd, sect); |
| if (vma < low) |
| low = vma; |
| if (vma + bfd_get_section_size (sect) > high) |
| high = vma + bfd_get_section_size (sect); |
| |
| data->segment_info[i] = 1; |
| } |
| |
| data->segment_bases[0] = low; |
| data->segment_sizes[0] = high - low; |
| |
| return data; |
| } |
| |
| /* Process a symbol file, as either the main file or as a dynamically |
| loaded file. |
| |
| 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 `struct section_offsets'. |
| If ADDRS is non-zero, OFFSETS must be zero. |
| |
| OFFSETS is a table of section offsets already in the right |
| format-specific representation. NUM_OFFSETS is the number of |
| elements present in OFFSETS->offsets. If OFFSETS is non-zero, we |
| assume this is the proper table the call to sym_offsets described |
| above would produce. Instead of calling sym_offsets, we just dump |
| it right into objfile->section_offsets. (When we're re-reading |
| symbols from an objfile, we don't have the original load address |
| list any more; all we have is the section offset table.) If |
| OFFSETS is non-zero, ADDRS must be zero. |
| |
| MAINLINE is nonzero if this is the main symbol file, or zero if |
| it's an extra symbol file such as dynamically loaded code. |
| |
| VERBO is nonzero if the caller has printed a verbose message about |
| the symbol reading (and complaints can be more terse about it). */ |
| |
| void |
| syms_from_objfile (struct objfile *objfile, |
| struct section_addr_info *addrs, |
| struct section_offsets *offsets, |
| int num_offsets, |
| int mainline, |
| int verbo) |
| { |
| struct section_addr_info *local_addr = NULL; |
| struct cleanup *old_chain; |
| |
| gdb_assert (! (addrs && offsets)); |
| |
| init_entry_point_info (objfile); |
| objfile->sf = find_sym_fns (objfile->obfd); |
| |
| if (objfile->sf == NULL) |
| return; /* No symbols. */ |
| |
| /* Make sure that partially constructed symbol tables will be cleaned up |
| if an error occurs during symbol reading. */ |
| old_chain = make_cleanup_free_objfile (objfile); |
| |
| /* If ADDRS and OFFSETS are both 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 && ! offsets) |
| { |
| local_addr |
| = alloc_section_addr_info (bfd_count_sections (objfile->obfd)); |
| make_cleanup (xfree, local_addr); |
| addrs = local_addr; |
| } |
| |
| /* Now either addrs or offsets is non-zero. */ |
| |
| 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. */ |
| make_cleanup (clear_symtab_users_cleanup, 0 /*ignore*/); |
| |
| /* Since no error yet, throw away the old symbol table. */ |
| |
| if (symfile_objfile != NULL) |
| { |
| free_objfile (symfile_objfile); |
| symfile_objfile = 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 (!mainline && addrs && addrs->other[0].name) |
| { |
| asection *lower_sect; |
| asection *sect; |
| CORE_ADDR lower_offset; |
| int i; |
| |
| /* Find lowest loadable section to be used as starting point for |
| continguous sections. FIXME!! won't work without call to find |
| .text first, but this assumes text is lowest section. */ |
| lower_sect = bfd_get_section_by_name (objfile->obfd, ".text"); |
| if (lower_sect == NULL) |
| bfd_map_over_sections (objfile->obfd, find_lowest_section, |
| &lower_sect); |
| if (lower_sect == NULL) |
| warning (_("no loadable sections found in added symbol-file %s"), |
| objfile->name); |
| else |
| if ((bfd_get_section_flags (objfile->obfd, lower_sect) & SEC_CODE) == 0) |
| warning (_("Lowest section in %s is %s at %s"), |
| objfile->name, |
| bfd_section_name (objfile->obfd, lower_sect), |
| paddr (bfd_section_vma (objfile->obfd, lower_sect))); |
| if (lower_sect != NULL) |
| lower_offset = bfd_section_vma (objfile->obfd, lower_sect); |
| else |
| lower_offset = 0; |
| |
| /* 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->num_sections && addrs->other[i].name; i++) |
| { |
| if (addrs->other[i].addr != 0) |
| { |
| sect = bfd_get_section_by_name (objfile->obfd, |
| addrs->other[i].name); |
| if (sect) |
| { |
| addrs->other[i].addr |
| -= bfd_section_vma (objfile->obfd, sect); |
| lower_offset = addrs->other[i].addr; |
| /* This is the index used by BFD. */ |
| addrs->other[i].sectindex = sect->index ; |
| } |
| else |
| { |
| warning (_("section %s not found in %s"), |
| addrs->other[i].name, |
| objfile->name); |
| addrs->other[i].addr = 0; |
| } |
| } |
| else |
| addrs->other[i].addr = lower_offset; |
| } |
| } |
| |
| /* 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 (&symfile_complaints, 1, verbo); |
| |
| if (addrs) |
| (*objfile->sf->sym_offsets) (objfile, addrs); |
| else |
| { |
| size_t size = SIZEOF_N_SECTION_OFFSETS (num_offsets); |
| |
| /* Just copy in the offset table directly as given to us. */ |
| objfile->num_sections = num_offsets; |
| objfile->section_offsets |
| = ((struct section_offsets *) |
| obstack_alloc (&objfile->objfile_obstack, size)); |
| memcpy (objfile->section_offsets, offsets, size); |
| |
| init_objfile_sect_indices (objfile); |
| } |
| |
| #ifndef DEPRECATED_IBM6000_TARGET |
| /* This is a SVR4/SunOS specific hack, I think. In any event, it |
| screws RS/6000. sym_offsets should be doing this sort of thing, |
| because it knows the mapping between bfd sections and |
| section_offsets. */ |
| /* This is a hack. As far as I can tell, section offsets are not |
| target dependent. They are all set to addr with a couple of |
| exceptions. The exceptions are sysvr4 shared libraries, whose |
| offsets are kept in solib structures anyway and rs6000 xcoff |
| which handles shared libraries in a completely unique way. |
| |
| Section offsets are built similarly, except that they are built |
| by adding addr in all cases because there is no clear mapping |
| from section_offsets into actual sections. Note that solib.c |
| has a different algorithm for finding section offsets. |
| |
| These should probably all be collapsed into some target |
| independent form of shared library support. FIXME. */ |
| |
| if (addrs) |
| { |
| struct obj_section *s; |
| |
| /* Map section offsets in "addr" back to the object's |
| sections by comparing the section names with bfd's |
| section names. Then adjust the section address by |
| the offset. */ /* for gdb/13815 */ |
| |
| ALL_OBJFILE_OSECTIONS (objfile, s) |
| { |
| CORE_ADDR s_addr = 0; |
| int i; |
| |
| for (i = 0; |
| !s_addr && i < addrs->num_sections && addrs->other[i].name; |
| i++) |
| if (strcmp (bfd_section_name (s->objfile->obfd, |
| s->the_bfd_section), |
| addrs->other[i].name) == 0) |
| s_addr = addrs->other[i].addr; /* end added for gdb/13815 */ |
| |
| s->addr -= s->offset; |
| s->addr += s_addr; |
| s->endaddr -= s->offset; |
| s->endaddr += s_addr; |
| s->offset += s_addr; |
| } |
| } |
| #endif /* not DEPRECATED_IBM6000_TARGET */ |
| |
| (*objfile->sf->sym_read) (objfile, mainline); |
| |
| /* Don't allow char * to have a typename (else would get caddr_t). |
| Ditto void *. FIXME: Check whether this is now done by all the |
| symbol readers themselves (many of them now do), and if so remove |
| it from here. */ |
| |
| TYPE_NAME (lookup_pointer_type (builtin_type_char)) = 0; |
| TYPE_NAME (lookup_pointer_type (builtin_type_void)) = 0; |
| |
| /* Mark the objfile has having had initial symbol read attempted. Note |
| that this does not mean we found any symbols... */ |
| |
| objfile->flags |= OBJF_SYMS; |
| |
| /* Discard cleanups as symbol reading was successful. */ |
| |
| discard_cleanups (old_chain); |
| } |
| |
| /* Perform required actions after either reading in the initial |
| symbols for a new objfile, or mapping in the symbols from a reusable |
| objfile. */ |
| |
| void |
| new_symfile_objfile (struct objfile *objfile, int mainline, int verbo) |
| { |
| |
| /* 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 (mainline) |
| { |
| /* OK, make it the "real" symbol file. */ |
| symfile_objfile = objfile; |
| |
| clear_symtab_users (); |
| } |
| else |
| { |
| breakpoint_re_set (); |
| } |
| |
| /* We're done reading the symbol file; finish off complaints. */ |
| clear_complaints (&symfile_complaints, 0, verbo); |
| } |
| |
| /* 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. |
| This BFD will be closed on error, and is always consumed by this function. |
| |
| FROM_TTY says how verbose to be. |
| |
| MAINLINE specifies whether this is the main symbol file, or whether |
| it's an extra symbol file such as dynamically loaded code. |
| |
| ADDRS, OFFSETS, and NUM_OFFSETS are as described for |
| syms_from_objfile, above. ADDRS is ignored when MAINLINE is |
| non-zero. |
| |
| 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_or_offsets (bfd *abfd, int from_tty, |
| struct section_addr_info *addrs, |
| struct section_offsets *offsets, |
| int num_offsets, |
| int mainline, int flags) |
| { |
| struct objfile *objfile; |
| struct partial_symtab *psymtab; |
| char *debugfile = NULL; |
| struct section_addr_info *orig_addrs = NULL; |
| struct cleanup *my_cleanups; |
| const char *name = bfd_get_filename (abfd); |
| |
| my_cleanups = make_cleanup_bfd_close (abfd); |
| |
| /* Give user a chance to burp if we'd be |
| interactively wiping out any existing symbols. */ |
| |
| if ((have_full_symbols () || have_partial_symbols ()) |
| && mainline |
| && from_tty |
| && !query ("Load new symbol table from \"%s\"? ", name)) |
| error (_("Not confirmed.")); |
| |
| objfile = allocate_objfile (abfd, flags); |
| discard_cleanups (my_cleanups); |
| |
| if (addrs) |
| { |
| orig_addrs = copy_section_addr_info (addrs); |
| make_cleanup_free_section_addr_info (orig_addrs); |
| } |
| |
| /* 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 (from_tty || info_verbose) |
| { |
| if (deprecated_pre_add_symbol_hook) |
| deprecated_pre_add_symbol_hook (name); |
| else |
| { |
| printf_unfiltered (_("Reading symbols from %s..."), name); |
| wrap_here (""); |
| gdb_flush (gdb_stdout); |
| } |
| } |
| syms_from_objfile (objfile, addrs, offsets, num_offsets, |
| mainline, from_tty); |
| |
| /* 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) || readnow_symbol_files) |
| { |
| if (from_tty || info_verbose) |
| { |
| printf_unfiltered (_("expanding to full symbols...")); |
| wrap_here (""); |
| gdb_flush (gdb_stdout); |
| } |
| |
| for (psymtab = objfile->psymtabs; |
| psymtab != NULL; |
| psymtab = psymtab->next) |
| { |
| psymtab_to_symtab (psymtab); |
| } |
| } |
| |
| /* If the file has its own symbol tables it has no separate debug info. |
| `.dynsym'/`.symtab' go to MSYMBOLS, `.debug_info' goes to SYMTABS/PSYMTABS. |
| `.gnu_debuglink' may no longer be present with `.note.gnu.build-id'. */ |
| if (objfile->psymtabs == NULL) |
| debugfile = find_separate_debug_file (objfile); |
| if (debugfile) |
| { |
| if (addrs != NULL) |
| { |
| objfile->separate_debug_objfile |
| = symbol_file_add (debugfile, from_tty, orig_addrs, 0, flags); |
| } |
| else |
| { |
| objfile->separate_debug_objfile |
| = symbol_file_add (debugfile, from_tty, NULL, 0, flags); |
| } |
| objfile->separate_debug_objfile->separate_debug_objfile_backlink |
| = objfile; |
| |
| /* Put the separate debug object before the normal one, this is so that |
| usage of the ALL_OBJFILES_SAFE macro will stay safe. */ |
| put_objfile_before (objfile->separate_debug_objfile, objfile); |
| |
| xfree (debugfile); |
| } |
| |
| if (!have_partial_symbols () && !have_full_symbols ()) |
| { |
| wrap_here (""); |
| printf_filtered (_("(no debugging symbols found)")); |
| if (from_tty || info_verbose) |
| printf_filtered ("..."); |
| else |
| printf_filtered ("\n"); |
| wrap_here (""); |
| } |
| |
| if (from_tty || info_verbose) |
| { |
| if (deprecated_post_add_symbol_hook) |
| deprecated_post_add_symbol_hook (); |
| else |
| { |
| printf_unfiltered (_("done.\n")); |
| } |
| } |
| |
| /* 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); |
| |
| do_cleanups (my_cleanups); |
| |
| if (objfile->sf == NULL) |
| return objfile; /* No symbols. */ |
| |
| new_symfile_objfile (objfile, mainline, from_tty); |
| |
| observer_notify_new_objfile (objfile); |
| |
| bfd_cache_close_all (); |
| return (objfile); |
| } |
| |
| |
| /* Process the symbol file ABFD, as either the main file or as a |
| dynamically loaded file. |
| |
| See symbol_file_add_with_addrs_or_offsets's comments for |
| details. */ |
| struct objfile * |
| symbol_file_add_from_bfd (bfd *abfd, int from_tty, |
| struct section_addr_info *addrs, |
| int mainline, int flags) |
| { |
| return symbol_file_add_with_addrs_or_offsets (abfd, |
| from_tty, addrs, 0, 0, |
| mainline, flags); |
| } |
| |
| |
| /* Process a symbol file, as either the main file or as a dynamically |
| loaded file. See symbol_file_add_with_addrs_or_offsets's comments |
| for details. */ |
| struct objfile * |
| symbol_file_add (char *name, int from_tty, struct section_addr_info *addrs, |
| int mainline, int flags) |
| { |
| return symbol_file_add_from_bfd (symfile_bfd_open (name), from_tty, |
| addrs, mainline, flags); |
| } |
| |
| |
| /* 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 (char *args, int from_tty) |
| { |
| symbol_file_add_main_1 (args, from_tty, 0); |
| } |
| |
| static void |
| symbol_file_add_main_1 (char *args, int from_tty, int flags) |
| { |
| symbol_file_add (args, from_tty, NULL, 1, flags); |
| |
| /* Getting new symbols may change our opinion about |
| what is frameless. */ |
| reinit_frame_cache (); |
| |
| set_initial_language (); |
| } |
| |
| void |
| symbol_file_clear (int from_tty) |
| { |
| if ((have_full_symbols () || have_partial_symbols ()) |
| && from_tty |
| && (symfile_objfile |
| ? !query (_("Discard symbol table from `%s'? "), |
| symfile_objfile->name) |
| : !query (_("Discard symbol table? ")))) |
| error (_("Not confirmed.")); |
| free_all_objfiles (); |
| |
| /* solib descriptors may have handles to objfiles. Since their |
| storage has just been released, we'd better wipe the solib |
| descriptors as well. |
| */ |
| no_shared_libraries (NULL, from_tty); |
| |
| symfile_objfile = NULL; |
| if (from_tty) |
| printf_unfiltered (_("No symbol file now.\n")); |
| } |
| |
| struct build_id |
| { |
| size_t size; |
| gdb_byte data[1]; |
| }; |
| |
| /* Locate NT_GNU_BUILD_ID from ABFD and return its content. */ |
| |
| static struct build_id * |
| build_id_bfd_get (bfd *abfd) |
| { |
| struct build_id *retval; |
| |
| if (!bfd_check_format (abfd, bfd_object) |
| || bfd_get_flavour (abfd) != bfd_target_elf_flavour |
| || elf_tdata (abfd)->build_id == NULL) |
| return NULL; |
| |
| retval = xmalloc (sizeof *retval - 1 + elf_tdata (abfd)->build_id_size); |
| retval->size = elf_tdata (abfd)->build_id_size; |
| memcpy (retval->data, elf_tdata (abfd)->build_id, retval->size); |
| |
| return retval; |
| } |
| |
| /* Return if FILENAME has NT_GNU_BUILD_ID matching the CHECK value. */ |
| |
| static int |
| build_id_verify (const char *filename, struct build_id *check) |
| { |
| bfd *abfd; |
| struct build_id *found = NULL; |
| int retval = 0; |
| |
| /* We expect to be silent on the non-existing files. */ |
| abfd = bfd_openr (filename, gnutarget); |
| if (abfd == NULL) |
| return 0; |
| |
| found = build_id_bfd_get (abfd); |
| |
| if (found == NULL) |
| warning (_("File \"%s\" has no build-id, file skipped"), filename); |
| else if (found->size != check->size |
| || memcmp (found->data, check->data, found->size) != 0) |
| warning (_("File \"%s\" has a different build-id, file skipped"), filename); |
| else |
| retval = 1; |
| |
| if (!bfd_close (abfd)) |
| warning (_("cannot close \"%s\": %s"), filename, |
| bfd_errmsg (bfd_get_error ())); |
| return retval; |
| } |
| |
| static char * |
| build_id_to_debug_filename (struct build_id *build_id) |
| { |
| char *link, *s, *retval = NULL; |
| gdb_byte *data = build_id->data; |
| size_t size = build_id->size; |
| |
| /* DEBUG_FILE_DIRECTORY/.build-id/ab/cdef */ |
| link = xmalloc (strlen (debug_file_directory) + (sizeof "/.build-id/" - 1) + 1 |
| + 2 * size + (sizeof ".debug" - 1) + 1); |
| s = link + sprintf (link, "%s/.build-id/", debug_file_directory); |
| if (size > 0) |
| { |
| size--; |
| s += sprintf (s, "%02x", (unsigned) *data++); |
| } |
| if (size > 0) |
| *s++ = '/'; |
| while (size-- > 0) |
| s += sprintf (s, "%02x", (unsigned) *data++); |
| strcpy (s, ".debug"); |
| |
| /* lrealpath() is expensive even for the usually non-existent files. */ |
| if (access (link, F_OK) == 0) |
| retval = lrealpath (link); |
| xfree (link); |
| |
| if (retval != NULL && !build_id_verify (retval, build_id)) |
| { |
| xfree (retval); |
| retval = NULL; |
| } |
| |
| return retval; |
| } |
| |
| static char * |
| get_debug_link_info (struct objfile *objfile, unsigned long *crc32_out) |
| { |
| asection *sect; |
| bfd_size_type debuglink_size; |
| unsigned long crc32; |
| char *contents; |
| int crc_offset; |
| unsigned char *p; |
| |
| sect = bfd_get_section_by_name (objfile->obfd, ".gnu_debuglink"); |
| |
| if (sect == NULL) |
| return NULL; |
| |
| debuglink_size = bfd_section_size (objfile->obfd, sect); |
| |
| contents = xmalloc (debuglink_size); |
| bfd_get_section_contents (objfile->obfd, sect, contents, |
| (file_ptr)0, (bfd_size_type)debuglink_size); |
| |
| /* Crc value is stored after the filename, aligned up to 4 bytes. */ |
| crc_offset = strlen (contents) + 1; |
| crc_offset = (crc_offset + 3) & ~3; |
| |
| crc32 = bfd_get_32 (objfile->obfd, (bfd_byte *) (contents + crc_offset)); |
| |
| *crc32_out = crc32; |
| return contents; |
| } |
| |
| static int |
| separate_debug_file_exists (const char *name, unsigned long crc) |
| { |
| unsigned long file_crc = 0; |
| int fd; |
| gdb_byte buffer[8*1024]; |
| int count; |
| |
| fd = open (name, O_RDONLY | O_BINARY); |
| if (fd < 0) |
| return 0; |
| |
| while ((count = read (fd, buffer, sizeof (buffer))) > 0) |
| file_crc = gnu_debuglink_crc32 (file_crc, buffer, count); |
| |
| close (fd); |
| |
| return crc == file_crc; |
| } |
| |
| char *debug_file_directory = NULL; |
| static void |
| show_debug_file_directory (struct ui_file *file, int from_tty, |
| struct cmd_list_element *c, const char *value) |
| { |
| fprintf_filtered (file, _("\ |
| The directory where separate debug symbols are searched for is \"%s\".\n"), |
| value); |
| } |
| |
| #if ! defined (DEBUG_SUBDIRECTORY) |
| #define DEBUG_SUBDIRECTORY ".debug" |
| #endif |
| |
| static char * |
| find_separate_debug_file (struct objfile *objfile) |
| { |
| asection *sect; |
| char *basename; |
| char *dir; |
| char *debugfile; |
| char *name_copy; |
| char *canon_name; |
| bfd_size_type debuglink_size; |
| unsigned long crc32; |
| int i; |
| struct build_id *build_id; |
| |
| build_id = build_id_bfd_get (objfile->obfd); |
| if (build_id != NULL) |
| { |
| char *build_id_name; |
| |
| build_id_name = build_id_to_debug_filename (build_id); |
| free (build_id); |
| /* Prevent looping on a stripped .debug file. */ |
| if (build_id_name != NULL && strcmp (build_id_name, objfile->name) == 0) |
| { |
| warning (_("\"%s\": separate debug info file has no debug info"), |
| build_id_name); |
| xfree (build_id_name); |
| } |
| else if (build_id_name != NULL) |
| return build_id_name; |
| } |
| |
| basename = get_debug_link_info (objfile, &crc32); |
| |
| if (basename == NULL) |
| return NULL; |
| |
| dir = xstrdup (objfile->name); |
| |
| /* Strip off the final filename part, leaving the directory name, |
| followed by a slash. Objfile names should always be absolute and |
| tilde-expanded, so there should always be a slash in there |
| somewhere. */ |
| for (i = strlen(dir) - 1; i >= 0; i--) |
| { |
| if (IS_DIR_SEPARATOR (dir[i])) |
| break; |
| } |
| gdb_assert (i >= 0 && IS_DIR_SEPARATOR (dir[i])); |
| dir[i+1] = '\0'; |
| |
| debugfile = alloca (strlen (debug_file_directory) + 1 |
| + strlen (dir) |
| + strlen (DEBUG_SUBDIRECTORY) |
| + strlen ("/") |
| + strlen (basename) |
| + 1); |
| |
| /* First try in the same directory as the original file. */ |
| strcpy (debugfile, dir); |
| strcat (debugfile, basename); |
| |
| if (separate_debug_file_exists (debugfile, crc32)) |
| { |
| xfree (basename); |
| xfree (dir); |
| return xstrdup (debugfile); |
| } |
| |
| /* Then try in the subdirectory named DEBUG_SUBDIRECTORY. */ |
| strcpy (debugfile, dir); |
| strcat (debugfile, DEBUG_SUBDIRECTORY); |
| strcat (debugfile, "/"); |
| strcat (debugfile, basename); |
| |
| if (separate_debug_file_exists (debugfile, crc32)) |
| { |
| xfree (basename); |
| xfree (dir); |
| return xstrdup (debugfile); |
| } |
| |
| /* Then try in the global debugfile directory. */ |
| strcpy (debugfile, debug_file_directory); |
| strcat (debugfile, "/"); |
| strcat (debugfile, dir); |
| strcat (debugfile, basename); |
| |
| if (separate_debug_file_exists (debugfile, crc32)) |
| { |
| xfree (basename); |
| xfree (dir); |
| return xstrdup (debugfile); |
| } |
| |
| /* If the file is in the sysroot, try using its base path in the |
| global debugfile directory. */ |
| canon_name = lrealpath (dir); |
| if (canon_name |
| && strncmp (canon_name, gdb_sysroot, strlen (gdb_sysroot)) == 0 |
| && IS_DIR_SEPARATOR (canon_name[strlen (gdb_sysroot)])) |
| { |
| strcpy (debugfile, debug_file_directory); |
| strcat (debugfile, canon_name + strlen (gdb_sysroot)); |
| strcat (debugfile, "/"); |
| strcat (debugfile, basename); |
| |
| if (separate_debug_file_exists (debugfile, crc32)) |
| { |
| xfree (canon_name); |
| xfree (basename); |
| xfree (dir); |
| return xstrdup (debugfile); |
| } |
| } |
| |
| if (canon_name) |
| xfree (canon_name); |
| |
| xfree (basename); |
| xfree (dir); |
| return NULL; |
| } |
| |
| |
| /* 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 (char *args, int from_tty) |
| { |
| dont_repeat (); |
| |
| if (args == NULL) |
| { |
| symbol_file_clear (from_tty); |
| } |
| else |
| { |
| char **argv = buildargv (args); |
| int flags = OBJF_USERLOADED; |
| struct cleanup *cleanups; |
| char *name = NULL; |
| |
| if (argv == NULL) |
| nomem (0); |
| |
| cleanups = make_cleanup_freeargv (argv); |
| while (*argv != NULL) |
| { |
| if (strcmp (*argv, "-readnow") == 0) |
| flags |= OBJF_READNOW; |
| else if (**argv == '-') |
| error (_("unknown option `%s'"), *argv); |
| else |
| { |
| symbol_file_add_main_1 (*argv, from_tty, flags); |
| name = *argv; |
| } |
| |
| argv++; |
| } |
| |
| if (name == NULL) |
| error (_("no symbol file name was specified")); |
| |
| do_cleanups (cleanups); |
| } |
| } |
| |
| /* Set the initial language. |
| |
| FIXME: A better solution would be to record the language in the |
| psymtab when reading partial symbols, and then use it (if known) to |
| set the language. This would be a win for formats that encode the |
| language in an easily discoverable place, such as DWARF. For |
| stabs, we can jump through hoops looking for specially named |
| symbols or try to intuit the language from the specific type of |
| stabs we find, but we can't do that until later when we read in |
| full symbols. */ |
| |
| void |
| set_initial_language (void) |
| { |
| struct partial_symtab *pst; |
| enum language lang = language_unknown; |
| |
| pst = find_main_psymtab (); |
| if (pst != NULL) |
| { |
| if (pst->filename != NULL) |
| lang = deduce_language_from_filename (pst->filename); |
| |
| if (lang == language_unknown) |
| { |
| /* Make C the default language */ |
| lang = language_c; |
| } |
| |
| 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. */ |
| |
| bfd * |
| symfile_bfd_open (char *name) |
| { |
| bfd *sym_bfd; |
| int desc; |
| char *absolute_name; |
| |
| name = tilde_expand (name); /* Returns 1st new malloc'd copy. */ |
| |
| /* Look down path for it, allocate 2nd new malloc'd copy. */ |
| desc = openp (getenv ("PATH"), OPF_TRY_CWD_FIRST, name, |
| O_RDONLY | O_BINARY, 0, &absolute_name); |
| #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__) |
| if (desc < 0) |
| { |
| char *exename = alloca (strlen (name) + 5); |
| strcat (strcpy (exename, name), ".exe"); |
| desc = openp (getenv ("PATH"), OPF_TRY_CWD_FIRST, exename, |
| O_RDONLY | O_BINARY, 0, &absolute_name); |
| } |
| #endif |
| if (desc < 0) |
| { |
| make_cleanup (xfree, name); |
| perror_with_name (name); |
| } |
| |
| /* Free 1st new malloc'd copy, but keep the 2nd malloc'd copy in |
| bfd. It'll be freed in free_objfile(). */ |
| xfree (name); |
| name = absolute_name; |
| |
| sym_bfd = bfd_fopen (name, gnutarget, FOPEN_RB, desc); |
| if (!sym_bfd) |
| { |
| close (desc); |
| make_cleanup (xfree, name); |
| error (_("\"%s\": can't open to read symbols: %s."), name, |
| bfd_errmsg (bfd_get_error ())); |
| } |
| bfd_set_cacheable (sym_bfd, 1); |
| |
| if (!bfd_check_format (sym_bfd, bfd_object)) |
| { |
| /* FIXME: should be checking for errors from bfd_close (for one |
| thing, on error it does not free all the storage associated |
| with the bfd). */ |
| bfd_close (sym_bfd); /* This also closes desc. */ |
| make_cleanup (xfree, name); |
| 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, 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. Called on startup by the |
| _initialize routine in each object file format reader, to register |
| information about each format the the reader is prepared to |
| handle. */ |
| |
| void |
| add_symtab_fns (struct sym_fns *sf) |
| { |
| sf->next = symtab_fns; |
| symtab_fns = 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 struct sym_fns * |
| find_sym_fns (bfd *abfd) |
| { |
| struct sym_fns *sf; |
| 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 (sf = symtab_fns; sf != NULL; sf = sf->next) |
| if (our_flavour == sf->sym_flavour) |
| return sf; |
| |
| 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 (char *arg, int from_tty) |
| { |
| if (arg == NULL) |
| { |
| char *parg; |
| int count = 0; |
| |
| parg = arg = get_exec_file (1); |
| |
| /* Count how many \ " ' tab space there are in the name. */ |
| while ((parg = strpbrk (parg, "\\\"'\t "))) |
| { |
| parg++; |
| count++; |
| } |
| |
| if (count) |
| { |
| /* We need to quote this string so buildargv can pull it apart. */ |
| char *temp = xmalloc (strlen (arg) + count + 1 ); |
| char *ptemp = temp; |
| char *prev; |
| |
| make_cleanup (xfree, temp); |
| |
| prev = parg = arg; |
| while ((parg = strpbrk (parg, "\\\"'\t "))) |
| { |
| strncpy (ptemp, prev, parg - prev); |
| ptemp += parg - prev; |
| prev = parg++; |
| *ptemp++ = '\\'; |
| } |
| strcpy (ptemp, prev); |
| |
| arg = temp; |
| } |
| } |
| |
| /* The user might be reloading because the binary has changed. Take |
| this opportunity to check. */ |
| reopen_exec_file (); |
| reread_symbols (); |
| |
| 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; |
| |
| /* Callback service function for generic_load (bfd_map_over_sections). */ |
| |
| static void |
| add_section_size_callback (bfd *abfd, asection *asec, void *data) |
| { |
| bfd_size_type *sum = data; |
| |
| *sum += bfd_get_section_size (asec); |
| } |
| |
| /* Opaque data for load_section_callback. */ |
| struct load_section_data { |
| unsigned long load_offset; |
| struct load_progress_data *progress_data; |
| VEC(memory_write_request_s) *requests; |
| }; |
| |
| /* Opaque data for load_progress. */ |
| struct load_progress_data { |
| /* Cumulative data. */ |
| unsigned long write_count; |
| unsigned long data_count; |
| bfd_size_type total_size; |
| }; |
| |
| /* Opaque data for load_progress for a single section. */ |
| struct load_progress_section_data { |
| struct load_progress_data *cumulative; |
| |
| /* Per-section data. */ |
| const char *section_name; |
| ULONGEST section_sent; |
| ULONGEST section_size; |
| CORE_ADDR lma; |
| gdb_byte *buffer; |
| }; |
| |
| /* Target write callback routine for progress reporting. */ |
| |
| static void |
| load_progress (ULONGEST bytes, void *untyped_arg) |
| { |
| struct load_progress_section_data *args = 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. */ |
| ui_out_message (uiout, 0, "Loading section %s, size 0x%s lma 0x%s\n", |
| args->section_name, paddr_nz (args->section_size), |
| paddr_nz (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 *check = xmalloc (bytes); |
| struct cleanup *verify_cleanups = make_cleanup (xfree, check); |
| |
| if (target_read_memory (args->lma, check, bytes) != 0) |
| error (_("Download verify read failed at 0x%s"), |
| paddr (args->lma)); |
| if (memcmp (args->buffer, check, bytes) != 0) |
| error (_("Download verify compare failed at 0x%s"), |
| paddr (args->lma)); |
| do_cleanups (verify_cleanups); |
| } |
| totals->data_count += bytes; |
| args->lma += bytes; |
| args->buffer += bytes; |
| totals->write_count += 1; |
| args->section_sent += bytes; |
| if (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); |
| } |
| |
| /* Callback service function for generic_load (bfd_map_over_sections). */ |
| |
| static void |
| load_section_callback (bfd *abfd, asection *asec, void *data) |
| { |
| struct memory_write_request *new_request; |
| struct load_section_data *args = data; |
| struct load_progress_section_data *section_data; |
| bfd_size_type size = bfd_get_section_size (asec); |
| gdb_byte *buffer; |
| const char *sect_name = bfd_get_section_name (abfd, asec); |
| |
| if ((bfd_get_section_flags (abfd, asec) & SEC_LOAD) == 0) |
| return; |
| |
| if (size == 0) |
| return; |
| |
| new_request = VEC_safe_push (memory_write_request_s, |
| args->requests, NULL); |
| memset (new_request, 0, sizeof (struct memory_write_request)); |
| section_data = xcalloc (1, sizeof (struct load_progress_section_data)); |
| new_request->begin = bfd_section_lma (abfd, asec) + args->load_offset; |
| new_request->end = new_request->begin + size; /* FIXME Should size be in instead? */ |
| new_request->data = xmalloc (size); |
| new_request->baton = section_data; |
| |
| buffer = new_request->data; |
| |
| section_data->cumulative = args->progress_data; |
| section_data->section_name = sect_name; |
| section_data->section_size = size; |
| section_data->lma = new_request->begin; |
| section_data->buffer = buffer; |
| |
| bfd_get_section_contents (abfd, asec, buffer, 0, size); |
| } |
| |
| /* Clean up an entire memory request vector, including load |
| data and progress records. */ |
| |
| static void |
| clear_memory_write_data (void *arg) |
| { |
| VEC(memory_write_request_s) **vec_p = arg; |
| VEC(memory_write_request_s) *vec = *vec_p; |
| int i; |
| struct memory_write_request *mr; |
| |
| for (i = 0; VEC_iterate (memory_write_request_s, vec, i, mr); ++i) |
| { |
| xfree (mr->data); |
| xfree (mr->baton); |
| } |
| VEC_free (memory_write_request_s, vec); |
| } |
| |
| void |
| generic_load (char *args, int from_tty) |
| { |
| bfd *loadfile_bfd; |
| struct timeval start_time, end_time; |
| char *filename; |
| struct cleanup *old_cleanups = make_cleanup (null_cleanup, 0); |
| struct load_section_data cbdata; |
| struct load_progress_data total_progress; |
| |
| CORE_ADDR entry; |
| char **argv; |
| |
| memset (&cbdata, 0, sizeof (cbdata)); |
| memset (&total_progress, 0, sizeof (total_progress)); |
| cbdata.progress_data = &total_progress; |
| |
| make_cleanup (clear_memory_write_data, &cbdata.requests); |
| |
| argv = buildargv (args); |
| |
| if (argv == NULL) |
| nomem(0); |
| |
| make_cleanup_freeargv (argv); |
| |
| filename = tilde_expand (argv[0]); |
| make_cleanup (xfree, filename); |
| |
| if (argv[1] != NULL) |
| { |
| char *endptr; |
| |
| cbdata.load_offset = strtoul (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. */ |
| loadfile_bfd = bfd_openr (filename, gnutarget); |
| if (loadfile_bfd == NULL) |
| { |
| perror_with_name (filename); |
| return; |
| } |
| |
| /* FIXME: should be checking for errors from bfd_close (for one thing, |
| on error it does not free all the storage associated with the |
| bfd). */ |
| make_cleanup_bfd_close (loadfile_bfd); |
| |
| if (!bfd_check_format (loadfile_bfd, bfd_object)) |
| { |
| error (_("\"%s\" is not an object file: %s"), filename, |
| bfd_errmsg (bfd_get_error ())); |
| } |
| |
| bfd_map_over_sections (loadfile_bfd, add_section_size_callback, |
| (void *) &total_progress.total_size); |
| |
| bfd_map_over_sections (loadfile_bfd, load_section_callback, &cbdata); |
| |
| gettimeofday (&start_time, NULL); |
| |
| if (target_write_memory_blocks (cbdata.requests, flash_discard, |
| load_progress) != 0) |
| error (_("Load failed")); |
| |
| gettimeofday (&end_time, NULL); |
| |
| entry = bfd_get_start_address (loadfile_bfd); |
| ui_out_text (uiout, "Start address "); |
| ui_out_field_fmt (uiout, "address", "0x%s", paddr_nz (entry)); |
| ui_out_text (uiout, ", load size "); |
| ui_out_field_fmt (uiout, "load-size", "%lu", total_progress.data_count); |
| ui_out_text (uiout, "\n"); |
| /* We were doing this in remote-mips.c, I suspect it is right |
| for other targets too. */ |
| write_pc (entry); |
| |
| /* FIXME: are we supposed to call symbol_file_add or not? According |
| to a comment from remote-mips.c (where a call to symbol_file_add |
| was commented out), making the call confuses GDB if more than one |
| file is loaded in. Some targets do (e.g., remote-vx.c) but |
| others don't (or didn't - perhaps they have all been deleted). */ |
| |
| print_transfer_performance (gdb_stdout, total_progress.data_count, |
| total_progress.write_count, |
| &start_time, &end_time); |
| |
| do_cleanups (old_cleanups); |
| } |
| |
| /* Report how fast the transfer went. */ |
| |
| /* DEPRECATED: cagney/1999-10-18: report_transfer_performance is being |
| replaced by print_transfer_performance (with a very different |
| function signature). */ |
| |
| void |
| report_transfer_performance (unsigned long data_count, time_t start_time, |
| time_t end_time) |
| { |
| struct timeval start, end; |
| |
| start.tv_sec = start_time; |
| start.tv_usec = 0; |
| end.tv_sec = end_time; |
| end.tv_usec = 0; |
| |
| print_transfer_performance (gdb_stdout, data_count, 0, &start, &end); |
| } |
| |
| void |
| print_transfer_performance (struct ui_file *stream, |
| unsigned long data_count, |
| unsigned long write_count, |
| const struct timeval *start_time, |
| const struct timeval *end_time) |
| { |
| ULONGEST time_count; |
| |
| /* Compute the elapsed time in milliseconds, as a tradeoff between |
| accuracy and overflow. */ |
| time_count = (end_time->tv_sec - start_time->tv_sec) * 1000; |
| time_count += (end_time->tv_usec - start_time->tv_usec) / 1000; |
| |
| ui_out_text (uiout, "Transfer rate: "); |
| if (time_count > 0) |
| { |
| unsigned long rate = ((ULONGEST) data_count * 1000) / time_count; |
| |
| if (ui_out_is_mi_like_p (uiout)) |
| { |
| ui_out_field_fmt (uiout, "transfer-rate", "%lu", rate * 8); |
| ui_out_text (uiout, " bits/sec"); |
| } |
| else if (rate < 1024) |
| { |
| ui_out_field_fmt (uiout, "transfer-rate", "%lu", rate); |
| ui_out_text (uiout, " bytes/sec"); |
| } |
| else |
| { |
| ui_out_field_fmt (uiout, "transfer-rate", "%lu", rate / 1024); |
| ui_out_text (uiout, " KB/sec"); |
| } |
| } |
| else |
| { |
| ui_out_field_fmt (uiout, "transferred-bits", "%lu", (data_count * 8)); |
| ui_out_text (uiout, " bits in <1 sec"); |
| } |
| if (write_count > 0) |
| { |
| ui_out_text (uiout, ", "); |
| ui_out_field_fmt (uiout, "write-rate", "%lu", data_count / write_count); |
| ui_out_text (uiout, " bytes/write"); |
| } |
| ui_out_text (uiout, ".\n"); |
| } |
| |
| /* This function allows the addition of incrementally linked object files. |
| It does not modify any state in the target, only in the debugger. */ |
| /* Note: ezannoni 2000-04-13 This function/command used to have a |
| special case syntax for the rombug target (Rombug is the boot |
| monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the |
| rombug case, the user doesn't need to supply a text address, |
| instead a call to target_link() (in target.c) would supply the |
| value to use. We are now discontinuing this type of ad hoc syntax. */ |
| |
| static void |
| add_symbol_file_command (char *args, int from_tty) |
| { |
| char *filename = NULL; |
| int flags = OBJF_USERLOADED; |
| char *arg; |
| int expecting_option = 0; |
| int section_index = 0; |
| int argcnt = 0; |
| int sec_num = 0; |
| int i; |
| int expecting_sec_name = 0; |
| int expecting_sec_addr = 0; |
| char **argv; |
| |
| struct sect_opt |
| { |
| char *name; |
| char *value; |
| }; |
| |
| struct section_addr_info *section_addrs; |
| struct sect_opt *sect_opts = NULL; |
| size_t num_sect_opts = 0; |
| struct cleanup *my_cleanups = make_cleanup (null_cleanup, NULL); |
| |
| num_sect_opts = 16; |
| sect_opts = (struct sect_opt *) xmalloc (num_sect_opts |
| * sizeof (struct sect_opt)); |
| |
| dont_repeat (); |
| |
| if (args == NULL) |
| error (_("add-symbol-file takes a file name and an address")); |
| |
| argv = buildargv (args); |
| make_cleanup_freeargv (argv); |
| |
| if (argv == NULL) |
| nomem (0); |
| |
| for (arg = argv[0], argcnt = 0; arg != NULL; arg = argv[++argcnt]) |
| { |
| /* Process the argument. */ |
| if (argcnt == 0) |
| { |
| /* The first argument is the file name. */ |
| filename = tilde_expand (arg); |
| make_cleanup (xfree, filename); |
| } |
| else |
| if (argcnt == 1) |
| { |
| /* The second argument is always the text address at which |
| to load the program. */ |
| sect_opts[section_index].name = ".text"; |
| sect_opts[section_index].value = arg; |
| if (++section_index >= num_sect_opts) |
| { |
| num_sect_opts *= 2; |
| sect_opts = ((struct sect_opt *) |
| xrealloc (sect_opts, |
| num_sect_opts |
| * sizeof (struct sect_opt))); |
| } |
| } |
| else |
| { |
| /* It's an option (starting with '-') or it's an argument |
| to an option */ |
| |
| if (*arg == '-') |
| { |
| if (strcmp (arg, "-readnow") == 0) |
| flags |= OBJF_READNOW; |
| else if (strcmp (arg, "-s") == 0) |
| { |
| expecting_sec_name = 1; |
| expecting_sec_addr = 1; |
| } |
| } |
| else |
| { |
| if (expecting_sec_name) |
| { |
| sect_opts[section_index].name = arg; |
| expecting_sec_name = 0; |
| } |
| else |
| if (expecting_sec_addr) |
| { |
| sect_opts[section_index].value = arg; |
| expecting_sec_addr = 0; |
| if (++section_index >= num_sect_opts) |
| { |
| num_sect_opts *= 2; |
| sect_opts = ((struct sect_opt *) |
| xrealloc (sect_opts, |
| num_sect_opts |
| * sizeof (struct sect_opt))); |
| } |
| } |
| else |
| error (_("USAGE: add-symbol-file <filename> <textaddress> [-mapped] [-readnow] [-s <secname> <addr>]*")); |
| } |
| } |
| } |
| |
| /* This command takes at least two arguments. The first one is a |
| filename, and the second is the address where this file has been |
| loaded. Abort now if this address hasn't been provided by the |
| user. */ |
| if (section_index < 1) |
| error (_("The address where %s has been loaded is missing"), filename); |
| |
| /* 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. */ |
| |
| printf_unfiltered (_("add symbol table from file \"%s\" at\n"), filename); |
| section_addrs = alloc_section_addr_info (section_index); |
| make_cleanup (xfree, section_addrs); |
| for (i = 0; i < section_index; i++) |
| { |
| CORE_ADDR addr; |
| char *val = sect_opts[i].value; |
| char *sec = sect_opts[i].name; |
| |
| addr = parse_and_eval_address (val); |
| |
| /* Here we store the section offsets in the order they were |
| entered on the command line. */ |
| section_addrs->other[sec_num].name = sec; |
| section_addrs->other[sec_num].addr = addr; |
| printf_unfiltered ("\t%s_addr = %s\n", |
| sec, hex_string ((unsigned long)addr)); |
| sec_num++; |
| |
| /* 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 (from_tty && (!query ("%s", ""))) |
| error (_("Not confirmed.")); |
| |
| symbol_file_add (filename, from_tty, section_addrs, 0, flags); |
| |
| /* Getting new symbols may change our opinion about what is |
| frameless. */ |
| reinit_frame_cache (); |
| do_cleanups (my_cleanups); |
| } |
| |
| static void |
| add_shared_symbol_files_command (char *args, int from_tty) |
| { |
| #ifdef ADD_SHARED_SYMBOL_FILES |
| ADD_SHARED_SYMBOL_FILES (args, from_tty); |
| #else |
| error (_("This command is not available in this configuration of GDB.")); |
| #endif |
| } |
| |
| /* Re-read symbols if a symbol-file has changed. */ |
| void |
| reread_symbols (void) |
| { |
| struct objfile *objfile; |
| long new_modtime; |
| int reread_one = 0; |
| struct stat new_statbuf; |
| int res; |
| |
| /* With the addition of shared libraries, this should be modified, |
| the load time should be saved in the partial symbol tables, since |
| different tables may come from different source files. FIXME. |
| This routine should then walk down each partial symbol table |
| and see if the symbol table that it originates from has been changed */ |
| |
| for (objfile = object_files; objfile; objfile = objfile->next) |
| { |
| if (objfile->obfd) |
| { |
| #ifdef DEPRECATED_IBM6000_TARGET |
| /* If this object is from a shared library, then you should |
| stat on the library name, not member name. */ |
| |
| if (objfile->obfd->my_archive) |
| res = stat (objfile->obfd->my_archive->filename, &new_statbuf); |
| else |
| #endif |
| res = stat (objfile->name, &new_statbuf); |
| if (res != 0) |
| { |
| /* FIXME, should use print_sys_errmsg but it's not filtered. */ |
| printf_unfiltered (_("`%s' has disappeared; keeping its symbols.\n"), |
| objfile->name); |
| continue; |
| } |
| new_modtime = new_statbuf.st_mtime; |
| if (new_modtime != objfile->mtime) |
| { |
| struct cleanup *old_cleanups; |
| struct section_offsets *offsets; |
| int num_offsets; |
| char *obfd_filename; |
| |
| printf_unfiltered (_("`%s' has changed; re-reading symbols.\n"), |
| objfile->name); |
| |
| /* 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). */ |
| old_cleanups = make_cleanup_free_objfile (objfile); |
| /* We need to do this whenever any symbols go away. */ |
| make_cleanup (clear_symtab_users_cleanup, 0 /*ignore*/); |
| |
| /* Clean up any state BFD has sitting around. We don't need |
| to close the descriptor but BFD lacks a way of closing the |
| BFD without closing the descriptor. */ |
| obfd_filename = bfd_get_filename (objfile->obfd); |
| if (!bfd_close (objfile->obfd)) |
| error (_("Can't close BFD for %s: %s"), objfile->name, |
| bfd_errmsg (bfd_get_error ())); |
| objfile->obfd = bfd_openr (obfd_filename, gnutarget); |
| if (objfile->obfd == NULL) |
| error (_("Can't open %s to read symbols."), objfile->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, |
| bfd_errmsg (bfd_get_error ())); |
| |
| /* Save the offsets, we will nuke them with the rest of the |
| objfile_obstack. */ |
| num_offsets = objfile->num_sections; |
| offsets = ((struct section_offsets *) |
| alloca (SIZEOF_N_SECTION_OFFSETS (num_offsets))); |
| memcpy (offsets, objfile->section_offsets, |
| SIZEOF_N_SECTION_OFFSETS (num_offsets)); |
| |
| /* 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. */ |
| |
| /* FIXME: Do we have to free a whole linked list, or is this |
| enough? */ |
| if (objfile->global_psymbols.list) |
| xfree (objfile->global_psymbols.list); |
| memset (&objfile->global_psymbols, 0, |
| sizeof (objfile->global_psymbols)); |
| if (objfile->static_psymbols.list) |
| xfree (objfile->static_psymbols.list); |
| memset (&objfile->static_psymbols, 0, |
| sizeof (objfile->static_psymbols)); |
| |
| /* Free the obstacks for non-reusable objfiles */ |
| bcache_xfree (objfile->psymbol_cache); |
| objfile->psymbol_cache = bcache_xmalloc (); |
| bcache_xfree (objfile->macro_cache); |
| objfile->macro_cache = bcache_xmalloc (); |
| if (objfile->demangled_names_hash != NULL) |
| { |
| htab_delete (objfile->demangled_names_hash); |
| objfile->demangled_names_hash = NULL; |
| } |
| obstack_free (&objfile->objfile_obstack, 0); |
| objfile->sections = NULL; |
| objfile->symtabs = NULL; |
| objfile->psymtabs = NULL; |
| objfile->free_psymtabs = NULL; |
| objfile->cp_namespace_symtab = NULL; |
| objfile->msymbols = NULL; |
| objfile->deprecated_sym_private = NULL; |
| objfile->minimal_symbol_count = 0; |
| memset (&objfile->msymbol_hash, 0, |
| sizeof (objfile->msymbol_hash)); |
| memset (&objfile->msymbol_demangled_hash, 0, |
| sizeof (objfile->msymbol_demangled_hash)); |
| clear_objfile_data (objfile); |
| if (objfile->sf != NULL) |
| { |
| (*objfile->sf->sym_finish) (objfile); |
| } |
| |
| /* We never make this a mapped file. */ |
| objfile->md = NULL; |
| objfile->psymbol_cache = bcache_xmalloc (); |
| objfile->macro_cache = bcache_xmalloc (); |
| /* 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); |
| if (build_objfile_section_table (objfile)) |
| { |
| error (_("Can't find the file sections in `%s': %s"), |
| objfile->name, bfd_errmsg (bfd_get_error ())); |
| } |
| terminate_minimal_symbol_table (objfile); |
| |
| /* We use the same section offsets as from last time. I'm not |
| sure whether that is always correct for shared libraries. */ |
| objfile->section_offsets = (struct section_offsets *) |
| obstack_alloc (&objfile->objfile_obstack, |
| SIZEOF_N_SECTION_OFFSETS (num_offsets)); |
| memcpy (objfile->section_offsets, offsets, |
| SIZEOF_N_SECTION_OFFSETS (num_offsets)); |
| objfile->num_sections = num_offsets; |
| |
| /* 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 == symfile_objfile) |
| { |
| (*objfile->sf->sym_new_init) (objfile); |
| } |
| |
| (*objfile->sf->sym_init) (objfile); |
| clear_complaints (&symfile_complaints, 1, 1); |
| /* The "mainline" parameter is a hideous hack; I think leaving it |
| zero is OK since dbxread.c also does what it needs to do if |
| objfile->global_psymbols.size is 0. */ |
| (*objfile->sf->sym_read) (objfile, 0); |
| if (!have_partial_symbols () && !have_full_symbols ()) |
| { |
| wrap_here (""); |
| printf_unfiltered (_("(no debugging symbols found)\n")); |
| wrap_here (""); |
| } |
| objfile->flags |= OBJF_SYMS; |
| |
| /* We're done reading the symbol file; finish off complaints. */ |
| clear_complaints (&symfile_complaints, 0, 1); |
| |
| /* Getting new symbols may change our opinion about what is |
| frameless. */ |
| |
| reinit_frame_cache (); |
| |
| /* Discard cleanups as symbol reading was successful. */ |
| discard_cleanups (old_cleanups); |
| |
| /* 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; |
| reread_one = 1; |
| reread_separate_symbols (objfile); |
| } |
| } |
| } |
| |
| if (reread_one) |
| { |
| clear_symtab_users (); |
| /* At least one objfile has changed, so we can consider that |
| the executable we're debugging has changed too. */ |
| observer_notify_executable_changed (NULL); |
| } |
| |
| } |
| |
| |
| /* Handle separate debug info for OBJFILE, which has just been |
| re-read: |
| - If we had separate debug info before, but now we don't, get rid |
| of the separated objfile. |
| - If we didn't have separated debug info before, but now we do, |
| read in the new separated debug info file. |
| - If the debug link points to a different file, toss the old one |
| and read the new one. |
| This function does *not* handle the case where objfile is still |
| using the same separate debug info file, but that file's timestamp |
| has changed. That case should be handled by the loop in |
| reread_symbols already. */ |
| static void |
| reread_separate_symbols (struct objfile *objfile) |
| { |
| char *debug_file; |
| unsigned long crc32; |
| |
| /* Does the updated objfile's debug info live in a |
| separate file? */ |
| debug_file = find_separate_debug_file (objfile); |
| |
| if (objfile->separate_debug_objfile) |
| { |
| /* There are two cases where we need to get rid of |
| the old separated debug info objfile: |
| - if the new primary objfile doesn't have |
| separated debug info, or |
| - if the new primary objfile has separate debug |
| info, but it's under a different filename. |
| |
| If the old and new objfiles both have separate |
| debug info, under the same filename, then we're |
| okay --- if the separated file's contents have |
| changed, we will have caught that when we |
| visited it in this function's outermost |
| loop. */ |
| if (! debug_file |
| || strcmp (debug_file, objfile->separate_debug_objfile->name) != 0) |
| free_objfile (objfile->separate_debug_objfile); |
| } |
| |
| /* If the new objfile has separate debug info, and we |
| haven't loaded it already, do so now. */ |
| if (debug_file |
| && ! objfile->separate_debug_objfile) |
| { |
| /* Use the same section offset table as objfile itself. |
| Preserve the flags from objfile that make sense. */ |
| objfile->separate_debug_objfile |
| = (symbol_file_add_with_addrs_or_offsets |
| (symfile_bfd_open (debug_file), |
| info_verbose, /* from_tty: Don't override the default. */ |
| 0, /* No addr table. */ |
| objfile->section_offsets, objfile->num_sections, |
| 0, /* Not mainline. See comments about this above. */ |
| objfile->flags & (OBJF_REORDERED | OBJF_SHARED | OBJF_READNOW |
| | OBJF_USERLOADED))); |
| objfile->separate_debug_objfile->separate_debug_objfile_backlink |
| = objfile; |
| } |
| if (debug_file) |
| xfree (debug_file); |
| } |
| |
| |
| |
| |
| |
| typedef struct |
| { |
| char *ext; |
| enum language lang; |
| } |
| filename_language; |
| |
| static filename_language *filename_language_table; |
| static int fl_table_size, fl_table_next; |
| |
| static void |
| add_filename_language (char *ext, enum language lang) |
| { |
| if (fl_table_next >= fl_table_size) |
| { |
| fl_table_size += 10; |
| filename_language_table = |
| xrealloc (filename_language_table, |
| fl_table_size * sizeof (*filename_language_table)); |
| } |
| |
| filename_language_table[fl_table_next].ext = xstrdup (ext); |
| filename_language_table[fl_table_next].lang = lang; |
| fl_table_next++; |
| } |
| |
| static char *ext_args; |
| static void |
| show_ext_args (struct ui_file *file, int from_tty, |
| struct cmd_list_element *c, const char *value) |
| { |
| fprintf_filtered (file, _("\ |
| Mapping between filename extension and source language is \"%s\".\n"), |
| value); |
| } |
| |
| static void |
| set_ext_lang_command (char *args, int from_tty, struct cmd_list_element *e) |
| { |
| int i; |
| char *cp = ext_args; |
| enum language lang; |
| |
| /* First arg is filename extension, starting with '.' */ |
| if (*cp != '.') |
| error (_("'%s': Filename extension must begin with '.'"), ext_args); |
| |
| /* Find end of first arg. */ |
| while (*cp && !isspace (*cp)) |
| cp++; |
| |
| if (*cp == '\0') |
| error (_("'%s': two arguments required -- filename extension and language"), |
| ext_args); |
| |
| /* Null-terminate first arg */ |
| *cp++ = '\0'; |
| |
| /* Find beginning of second arg, which should be a source language. */ |
| while (*cp && isspace (*cp)) |
| cp++; |
| |
| if (*cp == '\0') |
| error (_("'%s': two arguments required -- filename extension and language"), |
| ext_args); |
| |
| /* Lookup the language from among those we know. */ |
| lang = language_enum (cp); |
| |
| /* Now lookup the filename extension: do we already know it? */ |
| for (i = 0; i < fl_table_next; i++) |
| if (0 == strcmp (ext_args, filename_language_table[i].ext)) |
| break; |
| |
| if (i >= fl_table_next) |
| { |
| /* new file extension */ |
| add_filename_language (ext_args, lang); |
| } |
| else |
| { |
| /* redefining a previously known filename extension */ |
| |
| /* if (from_tty) */ |
| /* query ("Really make files of type %s '%s'?", */ |
| /* ext_args, language_str (lang)); */ |
| |
| xfree (filename_language_table[i].ext); |
| filename_language_table[i].ext = xstrdup (ext_args); |
| filename_language_table[i].lang = lang; |
| } |
| } |
| |
| static void |
| info_ext_lang_command (char *args, int from_tty) |
| { |
| int i; |
| |
| printf_filtered (_("Filename extensions and the languages they represent:")); |
| printf_filtered ("\n\n"); |
| for (i = 0; i < fl_table_next; i++) |
| printf_filtered ("\t%s\t- %s\n", |
| filename_language_table[i].ext, |
| language_str (filename_language_table[i].lang)); |
| } |
| |
| static void |
| init_filename_language_table (void) |
| { |
| if (fl_table_size == 0) /* protect against repetition */ |
| { |
| fl_table_size = 20; |
| fl_table_next = 0; |
| filename_language_table = |
| xmalloc (fl_table_size * sizeof (*filename_language_table)); |
| add_filename_language (".c", language_c); |
| add_filename_language (".C", language_cplus); |
| add_filename_language (".cc", language_cplus); |
| add_filename_language (".cp", language_cplus); |
| add_filename_language (".cpp", language_cplus); |
| add_filename_language (".cxx", language_cplus); |
| add_filename_language (".c++", language_cplus); |
| add_filename_language (".java", language_java); |
| add_filename_language (".class", language_java); |
| add_filename_language (".m", language_objc); |
| add_filename_language (".f", language_fortran); |
| add_filename_language (".F", language_fortran); |
| add_filename_language (".s", language_asm); |
| add_filename_language (".sx", language_asm); |
| add_filename_language (".S", language_asm); |
| add_filename_language (".pas", language_pascal); |
| add_filename_language (".p", language_pascal); |
| add_filename_language (".pp", language_pascal); |
| add_filename_language (".adb", language_ada); |
| add_filename_language (".ads", language_ada); |
| add_filename_language (".a", language_ada); |
| add_filename_language (".ada", language_ada); |
| } |
| } |
| |
| enum language |
| deduce_language_from_filename (char *filename) |
| { |
| int i; |
| char *cp; |
| |
| if (filename != NULL) |
| if ((cp = strrchr (filename, '.')) != NULL) |
| for (i = 0; i < fl_table_next; i++) |
| if (strcmp (cp, filename_language_table[i].ext) == 0) |
| return filename_language_table[i].lang; |
| |
| return language_unknown; |
| } |
| |
| /* allocate_symtab: |
| |
| Allocate and partly initialize a new symbol table. Return a pointer |
| to it. error() if no space. |
| |
| Caller must set these fields: |
| LINETABLE(symtab) |
| symtab->blockvector |
| symtab->dirname |
| symtab->free_code |
| symtab->free_ptr |
| possibly free_named_symtabs (symtab->filename); |
| */ |
| |
| struct symtab * |
| allocate_symtab (char *filename, struct objfile *objfile) |
| { |
| struct symtab *symtab; |
| |
| symtab = (struct symtab *) |
| obstack_alloc (&objfile->objfile_obstack, sizeof (struct symtab)); |
| memset (symtab, 0, sizeof (*symtab)); |
| symtab->filename = obsavestring (filename, strlen (filename), |
| &objfile->objfile_obstack); |
| symtab->fullname = NULL; |
| symtab->language = deduce_language_from_filename (filename); |
| symtab->debugformat = obsavestring ("unknown", 7, |
| &objfile->objfile_obstack); |
| |
| /* Hook it to the objfile it comes from */ |
| |
| symtab->objfile = objfile; |
| symtab->next = objfile->symtabs; |
| objfile->symtabs = symtab; |
| |
| return (symtab); |
| } |
| |
| struct partial_symtab * |
| allocate_psymtab (char *filename, struct objfile *objfile) |
| { |
| struct partial_symtab *psymtab; |
| |
| if (objfile->free_psymtabs) |
| { |
| psymtab = objfile->free_psymtabs; |
| objfile->free_psymtabs = psymtab->next; |
| } |
| else |
| psymtab = (struct partial_symtab *) |
| obstack_alloc (&objfile->objfile_obstack, |
| sizeof (struct partial_symtab)); |
| |
| memset (psymtab, 0, sizeof (struct partial_symtab)); |
| psymtab->filename = obsavestring (filename, strlen (filename), |
| &objfile->objfile_obstack); |
| psymtab->symtab = NULL; |
| |
| /* Prepend it to the psymtab list for the objfile it belongs to. |
| Psymtabs are searched in most recent inserted -> least recent |
| inserted order. */ |
| |
| psymtab->objfile = objfile; |
| psymtab->next = objfile->psymtabs; |
| objfile->psymtabs = psymtab; |
| #if 0 |
| { |
| struct partial_symtab **prev_pst; |
| psymtab->objfile = objfile; |
| psymtab->next = NULL; |
| prev_pst = &(objfile->psymtabs); |
| while ((*prev_pst) != NULL) |
| prev_pst = &((*prev_pst)->next); |
| (*prev_pst) = psymtab; |
| } |
| #endif |
| |
| return (psymtab); |
| } |
| |
| void |
| discard_psymtab (struct partial_symtab *pst) |
| { |
| struct partial_symtab **prev_pst; |
| |
| /* From dbxread.c: |
| Empty psymtabs happen as a result of header files which don't |
| have any symbols in them. There can be a lot of them. But this |
| check is wrong, in that a psymtab with N_SLINE entries but |
| nothing else is not empty, but we don't realize that. Fixing |
| that without slowing things down might be tricky. */ |
| |
| /* First, snip it out of the psymtab chain */ |
| |
| prev_pst = &(pst->objfile->psymtabs); |
| while ((*prev_pst) != pst) |
| prev_pst = &((*prev_pst)->next); |
| (*prev_pst) = pst->next; |
| |
| /* Next, put it on a free list for recycling */ |
| |
| pst->next = pst->objfile->free_psymtabs; |
| pst->objfile->free_psymtabs = pst; |
| } |
| |
| |
| /* Reset all data structures in gdb which may contain references to symbol |
| table data. */ |
| |
| void |
| clear_symtab_users (void) |
| { |
| /* 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 (); |
| breakpoint_re_set (); |
| set_default_breakpoint (0, 0, 0, 0); |
| clear_pc_function_cache (); |
| observer_notify_new_objfile (NULL); |
| |
| /* Clear globals which might have pointed into a removed objfile. |
| FIXME: It's not clear which of these are supposed to persist |
| between expressions and which ought to be reset each time. */ |
| expression_context_block = NULL; |
| innermost_block = NULL; |
| |
| /* Varobj may refer to old symbols, perform a cleanup. */ |
| varobj_invalidate (); |
| |
| } |
| |
| static void |
| clear_symtab_users_cleanup (void *ignore) |
| { |
| clear_symtab_users (); |
| } |
| |
| /* clear_symtab_users_once: |
| |
| This function is run after symbol reading, or from a cleanup. |
| If an old symbol table was obsoleted, the old symbol table |
| has been blown away, but the other GDB data structures that may |
| reference it have not yet been cleared or re-directed. (The old |
| symtab was zapped, and the cleanup queued, in free_named_symtab() |
| below.) |
| |
| This function can be queued N times as a cleanup, or called |
| directly; it will do all the work the first time, and then will be a |
| no-op until the next time it is queued. This works by bumping a |
| counter at queueing time. Much later when the cleanup is run, or at |
| the end of symbol processing (in case the cleanup is discarded), if |
| the queued count is greater than the "done-count", we do the work |
| and set the done-count to the queued count. If the queued count is |
| less than or equal to the done-count, we just ignore the call. This |
| is needed because reading a single .o file will often replace many |
| symtabs (one per .h file, for example), and we don't want to reset |
| the breakpoints N times in the user's face. |
| |
| The reason we both queue a cleanup, and call it directly after symbol |
| reading, is because the cleanup protects us in case of errors, but is |
| discarded if symbol reading is successful. */ |
| |
| #if 0 |
| /* FIXME: As free_named_symtabs is currently a big noop this function |
| is no longer needed. */ |
| static void clear_symtab_users_once (void); |
| |
| static int clear_symtab_users_queued; |
| static int clear_symtab_users_done; |
| |
| static void |
| clear_symtab_users_once (void) |
| { |
| /* Enforce once-per-`do_cleanups'-semantics */ |
| if (clear_symtab_users_queued <= clear_symtab_users_done) |
| return; |
| clear_symtab_users_done = clear_symtab_users_queued; |
| |
| clear_symtab_users (); |
| } |
| #endif |
| |
| /* Delete the specified psymtab, and any others that reference it. */ |
| |
| static void |
| cashier_psymtab (struct partial_symtab *pst) |
| { |
| struct partial_symtab *ps, *pprev = NULL; |
| int i; |
| |
| /* Find its previous psymtab in the chain */ |
| for (ps = pst->objfile->psymtabs; ps; ps = ps->next) |
| { |
| if (ps == pst) |
| break; |
| pprev = ps; |
| } |
| |
| if (ps) |
| { |
| /* Unhook it from the chain. */ |
| if (ps == pst->objfile->psymtabs) |
| pst->objfile->psymtabs = ps->next; |
| else |
| pprev->next = ps->next; |
| |
| /* FIXME, we can't conveniently deallocate the entries in the |
| partial_symbol lists (global_psymbols/static_psymbols) that |
| this psymtab points to. These just take up space until all |
| the psymtabs are reclaimed. Ditto the dependencies list and |
| filename, which are all in the objfile_obstack. */ |
| |
| /* We need to cashier any psymtab that has this one as a dependency... */ |
| again: |
| for (ps = pst->objfile->psymtabs; ps; ps = ps->next) |
| { |
| for (i = 0; i < ps->number_of_dependencies; i++) |
| { |
| if (ps->dependencies[i] == pst) |
| { |
| cashier_psymtab (ps); |
| goto again; /* Must restart, chain has been munged. */ |
| } |
| } |
| } |
| } |
| } |
| |
| /* If a symtab or psymtab for filename NAME is found, free it along |
| with any dependent breakpoints, displays, etc. |
| Used when loading new versions of object modules with the "add-file" |
| command. This is only called on the top-level symtab or psymtab's name; |
| it is not called for subsidiary files such as .h files. |
| |
| Return value is 1 if we blew away the environment, 0 if not. |
| FIXME. The return value appears to never be used. |
| |
| FIXME. I think this is not the best way to do this. We should |
| work on being gentler to the environment while still cleaning up |
| all stray pointers into the freed symtab. */ |
| |
| int |
| free_named_symtabs (char *name) |
| { |
| #if 0 |
| /* FIXME: With the new method of each objfile having it's own |
| psymtab list, this function needs serious rethinking. In particular, |
| why was it ever necessary to toss psymtabs with specific compilation |
| unit filenames, as opposed to all psymtabs from a particular symbol |
| file? -- fnf |
| Well, the answer is that some systems permit reloading of particular |
| compilation units. We want to blow away any old info about these |
| compilation units, regardless of which objfiles they arrived in. --gnu. */ |
| |
| struct symtab *s; |
| struct symtab *prev; |
| struct partial_symtab *ps; |
| struct blockvector *bv; |
| int blewit = 0; |
| |
| /* We only wack things if the symbol-reload switch is set. */ |
| if (!symbol_reloading) |
| return 0; |
| |
| /* Some symbol formats have trouble providing file names... */ |
| if (name == 0 || *name == '\0') |
| return 0; |
| |
| /* Look for a psymtab with the specified name. */ |
| |
| again2: |
| for (ps = partial_symtab_list; ps; ps = ps->next) |
| { |
| if (strcmp (name, ps->filename) == 0) |
| { |
| cashier_psymtab (ps); /* Blow it away...and its little dog, too. */ |
| goto again2; /* Must restart, chain has been munged */ |
| } |
| } |
| |
| /* Look for a symtab with the specified name. */ |
| |
| for (s = symtab_list; s; s = s->next) |
| { |
| if (strcmp (name, s->filename) == 0) |
| break; |
| prev = s; |
| } |
| |
| if (s) |
| { |
| if (s == symtab_list) |
| symtab_list = s->next; |
| else |
| prev->next = s->next; |
| |
| /* For now, queue a delete for all breakpoints, displays, etc., whether |
| or not they depend on the symtab being freed. This should be |
| changed so that only those data structures affected are deleted. */ |
| |
| /* But don't delete anything if the symtab is empty. |
| This test is necessary due to a bug in "dbxread.c" that |
| causes empty symtabs to be created for N_SO symbols that |
| contain the pathname of the object file. (This problem |
| has been fixed in GDB 3.9x). */ |
| |
| bv = BLOCKVECTOR (s); |
| if (BLOCKVECTOR_NBLOCKS (bv) > 2 |
| || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK)) |
| || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK))) |
| { |
| complaint (&symfile_complaints, _("Replacing old symbols for `%s'"), |
| name); |
| clear_symtab_users_queued++; |
| make_cleanup (clear_symtab_users_once, 0); |
| blewit = 1; |
| } |
| else |
| complaint (&symfile_complaints, _("Empty symbol table found for `%s'"), |
| name); |
| |
| free_symtab (s); |
| } |
| else |
| { |
| /* It is still possible that some breakpoints will be affected |
| even though no symtab was found, since the file might have |
| been compiled without debugging, and hence not be associated |
| with a symtab. In order to handle this correctly, we would need |
| to keep a list of text address ranges for undebuggable files. |
| For now, we do nothing, since this is a fairly obscure case. */ |
| ; |
| } |
| |
| /* FIXME, what about the minimal symbol table? */ |
| return blewit; |
| #else |
| return (0); |
| #endif |
| } |
| |
| /* Allocate and partially fill a partial symtab. It will be |
| completely filled at the end of the symbol list. |
| |
| FILENAME is the name of the symbol-file we are reading from. */ |
| |
| struct partial_symtab * |
| start_psymtab_common (struct objfile *objfile, |
| struct section_offsets *section_offsets, char *filename, |
| CORE_ADDR textlow, struct partial_symbol **global_syms, |
| struct partial_symbol **static_syms) |
| { |
| struct partial_symtab *psymtab; |
| |
| psymtab = allocate_psymtab (filename, objfile); |
| psymtab->section_offsets = section_offsets; |
| psymtab->textlow = textlow; |
| psymtab->texthigh = psymtab->textlow; /* default */ |
| psymtab->globals_offset = global_syms - objfile->global_psymbols.list; |
| psymtab->statics_offset = static_syms - objfile->static_psymbols.list; |
| return (psymtab); |
| } |
| |
| /* Add a symbol with a long value to a psymtab. |
| Since one arg is a struct, we pass in a ptr and deref it (sigh). |
| Return the partial symbol that has been added. */ |
| |
| /* NOTE: carlton/2003-09-11: The reason why we return the partial |
| symbol is so that callers can get access to the symbol's demangled |
| name, which they don't have any cheap way to determine otherwise. |
| (Currenly, dwarf2read.c is the only file who uses that information, |
| though it's possible that other readers might in the future.) |
| Elena wasn't thrilled about that, and I don't blame her, but we |
| couldn't come up with a better way to get that information. If |
| it's needed in other situations, we could consider breaking up |
| SYMBOL_SET_NAMES to provide access to the demangled name lookup |
| cache. */ |
| |
| const struct partial_symbol * |
| add_psymbol_to_list (char *name, int namelength, domain_enum domain, |
| enum address_class class, |
| struct psymbol_allocation_list *list, long val, /* Value as a long */ |
| CORE_ADDR coreaddr, /* Value as a CORE_ADDR */ |
| enum language language, struct objfile *objfile) |
| { |
| struct partial_symbol *psym; |
| char *buf = alloca (namelength + 1); |
| /* psymbol is static so that there will be no uninitialized gaps in the |
| structure which might contain random data, causing cache misses in |
| bcache. */ |
| static struct partial_symbol psymbol; |
| |
| /* Create local copy of the partial symbol */ |
| memcpy (buf, name, namelength); |
| buf[namelength] = '\0'; |
| /* val and coreaddr are mutually exclusive, one of them *will* be zero */ |
| if (val != 0) |
| { |
| SYMBOL_VALUE (&psymbol) = val; |
| } |
| else |
| { |
| SYMBOL_VALUE_ADDRESS (&psymbol) = coreaddr; |
| } |
| SYMBOL_SECTION (&psymbol) = 0; |
| SYMBOL_LANGUAGE (&psymbol) = language; |
| PSYMBOL_DOMAIN (&psymbol) = domain; |
| PSYMBOL_CLASS (&psymbol) = class; |
| |
| SYMBOL_SET_NAMES (&psymbol, buf, namelength, objfile); |
| |
| /* Stash the partial symbol away in the cache */ |
| psym = deprecated_bcache (&psymbol, sizeof (struct partial_symbol), |
| objfile->psymbol_cache); |
| |
| /* Save pointer to partial symbol in psymtab, growing symtab if needed. */ |
| if (list->next >= list->list + list->size) |
| { |
| extend_psymbol_list (list, objfile); |
| } |
| *list->next++ = psym; |
| OBJSTAT (objfile, n_psyms++); |
| |
| return psym; |
| } |
| |
| /* Initialize storage for partial symbols. */ |
| |
| void |
| init_psymbol_list (struct objfile *objfile, int total_symbols) |
| { |
| /* Free any previously allocated psymbol lists. */ |
| |
| if (objfile->global_psymbols.list) |
| { |
| xfree (objfile->global_psymbols.list); |
| } |
| if (objfile->static_psymbols.list) |
| { |
| xfree (objfile->static_psymbols.list); |
| } |
| |
| /* Current best guess is that approximately a twentieth |
| of the total symbols (in a debugging file) are global or static |
| oriented symbols */ |
| |
| objfile->global_psymbols.size = total_symbols / 10; |
| objfile->static_psymbols.size = total_symbols / 10; |
| |
| if (objfile->global_psymbols.size > 0) |
| { |
| objfile->global_psymbols.next = |
| objfile->global_psymbols.list = (struct partial_symbol **) |
| xmalloc ((objfile->global_psymbols.size |
| * sizeof (struct partial_symbol *))); |
| } |
| if (objfile->static_psymbols.size > 0) |
| { |
| objfile->static_psymbols.next = |
| objfile->static_psymbols.list = (struct partial_symbol **) |
| xmalloc ((objfile->static_psymbols.size |
| * sizeof (struct partial_symbol *))); |
| } |
| } |
| |
| /* 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 |
| overlay_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 (asection *section) |
| { |
| /* FIXME: need bfd *, so we can use bfd_section_lma methods. */ |
| |
| if (overlay_debugging) |
| if (section && section->lma != 0 && |
| section->vma != section->lma) |
| 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 objfile *objfile; |
| struct obj_section *sect; |
| |
| ALL_OBJSECTIONS (objfile, sect) |
| if (section_is_overlay (sect->the_bfd_section)) |
| sect->ovly_mapped = -1; |
| } |
| |
| /* Function: overlay_is_mapped (SECTION) |
| Returns true if section is an overlay, and is currently mapped. |
| Private: public access is thru function section_is_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. */ |
| |
| static int |
| overlay_is_mapped (struct obj_section *osect) |
| { |
| if (osect == 0 || !section_is_overlay (osect->the_bfd_section)) |
| 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) */ |
| if (gdbarch_overlay_update_p (current_gdbarch)) |
| { |
| if (overlay_cache_invalid) |
| { |
| overlay_invalidate_all (); |
| overlay_cache_invalid = 0; |
| } |
| if (osect->ovly_mapped == -1) |
| gdbarch_overlay_update (current_gdbarch, osect); |
| } |
| /* fall thru to manual case */ |
| case ovly_on: /* overlay debugging manual */ |
| return osect->ovly_mapped == 1; |
| } |
| } |
| |
| /* Function: section_is_mapped |
| Returns true if section is an overlay, and is currently mapped. */ |
| |
| int |
| section_is_mapped (asection *section) |
| { |
| struct objfile *objfile; |
| struct obj_section *osect; |
| |
| if (overlay_debugging) |
| if (section && section_is_overlay (section)) |
| ALL_OBJSECTIONS (objfile, osect) |
| if (osect->the_bfd_section == section) |
| return overlay_is_mapped (osect); |
| |
| return 0; |
| } |
| |
| /* 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, asection *section) |
| { |
| /* FIXME: need bfd *, so we can use bfd_section_lma methods. */ |
| |
| int size; |
| |
| if (overlay_debugging) |
| if (section && section_is_overlay (section)) |
| { |
| size = bfd_get_section_size (section); |
| if (section->lma <= pc && pc < section->lma + 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, asection *section) |
| { |
| /* FIXME: need bfd *, so we can use bfd_section_vma methods. */ |
| |
| int size; |
| |
| if (overlay_debugging) |
| if (section && section_is_overlay (section)) |
| { |
| size = bfd_get_section_size (section); |
| if (section->vma <= pc && pc < section->vma + size) |
| return 1; |
| } |
| return 0; |
| } |
| |
| |
| /* Return true if the mapped ranges of sections A and B overlap, false |
| otherwise. */ |
| static int |
| sections_overlap (asection *a, asection *b) |
| { |
| /* FIXME: need bfd *, so we can use bfd_section_vma methods. */ |
| |
| CORE_ADDR a_start = a->vma; |
| CORE_ADDR a_end = a->vma + bfd_get_section_size (a); |
| CORE_ADDR b_start = b->vma; |
| CORE_ADDR b_end = b->vma + bfd_get_section_size (b); |
| |
| 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, asection *section) |
| { |
| /* FIXME: need bfd *, so we can use bfd_section_lma methods. */ |
| |
| if (overlay_debugging) |
| if (section && section_is_overlay (section) && |
| pc_in_mapped_range (pc, section)) |
| return pc + section->lma - section->vma; |
| |
| 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, asection *section) |
| { |
| /* FIXME: need bfd *, so we can use bfd_section_vma methods. */ |
| |
| if (overlay_debugging) |
| if (section && section_is_overlay (section) && |
| pc_in_unmapped_range (pc, section)) |
| return pc + section->vma - section->lma; |
| |
| 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, asection *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. */ |
| |
| asection * |
| find_pc_overlay (CORE_ADDR pc) |
| { |
| struct objfile *objfile; |
| struct obj_section *osect, *best_match = NULL; |
| |
| if (overlay_debugging) |
| ALL_OBJSECTIONS (objfile, osect) |
| if (section_is_overlay (osect->the_bfd_section)) |
| { |
| if (pc_in_mapped_range (pc, osect->the_bfd_section)) |
| { |
| if (overlay_is_mapped (osect)) |
| return osect->the_bfd_section; |
| else |
| best_match = osect; |
| } |
| else if (pc_in_unmapped_range (pc, osect->the_bfd_section)) |
| best_match = osect; |
| } |
| return best_match ? best_match->the_bfd_section : NULL; |
| } |
| |
| /* 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. */ |
| |
| asection * |
| find_pc_mapped_section (CORE_ADDR pc) |
| { |
| struct objfile *objfile; |
| struct obj_section *osect; |
| |
| if (overlay_debugging) |
| ALL_OBJSECTIONS (objfile, osect) |
| if (pc_in_mapped_range (pc, osect->the_bfd_section) && |
| overlay_is_mapped (osect)) |
| return osect->the_bfd_section; |
| |
| return NULL; |
| } |
| |
| /* Function: list_overlays_command |
| Print a list of mapped sections and their PC ranges */ |
| |
| void |
| list_overlays_command (char *args, int from_tty) |
| { |
| int nmapped = 0; |
| struct objfile *objfile; |
| struct obj_section *osect; |
| |
| if (overlay_debugging) |
| ALL_OBJSECTIONS (objfile, osect) |
| if (overlay_is_mapped (osect)) |
| { |
| const char *name; |
| bfd_vma lma, vma; |
| int size; |
| |
| vma = bfd_section_vma (objfile->obfd, osect->the_bfd_section); |
| lma = bfd_section_lma (objfile->obfd, osect->the_bfd_section); |
| size = bfd_get_section_size (osect->the_bfd_section); |
| name = bfd_section_name (objfile->obfd, osect->the_bfd_section); |
| |
| printf_filtered ("Section %s, loaded at ", name); |
| fputs_filtered (paddress (lma), gdb_stdout); |
| puts_filtered (" - "); |
| fputs_filtered (paddress (lma + size), gdb_stdout); |
| printf_filtered (", mapped at "); |
| fputs_filtered (paddress (vma), gdb_stdout); |
| puts_filtered (" - "); |
| fputs_filtered (paddress (vma + size), gdb_stdout); |
| puts_filtered ("\n"); |
| |
| nmapped++; |
| } |
| if (nmapped == 0) |
| printf_filtered (_("No sections are mapped.\n")); |
| } |
| |
| /* Function: map_overlay_command |
| Mark the named section as mapped (ie. residing at its VMA address). */ |
| |
| void |
| map_overlay_command (char *args, int from_tty) |
| { |
| struct objfile *objfile, *objfile2; |
| struct obj_section *sec, *sec2; |
| asection *bfdsec; |
| |
| 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 */ |
| ALL_OBJSECTIONS (objfile, sec) |
| if (!strcmp (bfd_section_name (objfile->obfd, sec->the_bfd_section), args)) |
| { |
| /* Now, check to see if the section is an overlay. */ |
| bfdsec = sec->the_bfd_section; |
| if (!section_is_overlay (bfdsec)) |
| 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: */ |
| ALL_OBJSECTIONS (objfile2, sec2) |
| if (sec2->ovly_mapped |
| && sec != sec2 |
| && sec->the_bfd_section != sec2->the_bfd_section |
| && sections_overlap (sec->the_bfd_section, |
| sec2->the_bfd_section)) |
| { |
| if (info_verbose) |
| printf_unfiltered (_("Note: section %s unmapped by overlap\n"), |
| bfd_section_name (objfile->obfd, |
| 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). */ |
| |
| void |
| unmap_overlay_command (char *args, int from_tty) |
| { |
| struct objfile *objfile; |
| struct obj_section *sec; |
| |
| 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 */ |
| ALL_OBJSECTIONS (objfile, sec) |
| if (!strcmp (bfd_section_name (objfile->obfd, 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 (char *args, int from_tty) |
| { |
| overlay_debugging = ovly_auto; |
| enable_overlay_breakpoints (); |
| if (info_verbose) |
| printf_unfiltered (_("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 (char *args, int from_tty) |
| { |
| overlay_debugging = ovly_on; |
| disable_overlay_breakpoints (); |
| if (info_verbose) |
| printf_unfiltered (_("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 (char *args, int from_tty) |
| { |
| overlay_debugging = ovly_off; |
| disable_overlay_breakpoints (); |
| if (info_verbose) |
| printf_unfiltered (_("Overlay debugging disabled.")); |
| } |
| |
| static void |
| overlay_load_command (char *args, int from_tty) |
| { |
| if (gdbarch_overlay_update_p (current_gdbarch)) |
| gdbarch_overlay_update (current_gdbarch, NULL); |
| else |
| error (_("This target does not know how to read its overlay state.")); |
| } |
| |
| /* Function: overlay_command |
| A place-holder for a mis-typed command */ |
| |
| /* Command list chain containing all defined "overlay" subcommands. */ |
| struct cmd_list_element *overlaylist; |
| |
| static void |
| overlay_command (char *args, int from_tty) |
| { |
| printf_unfiltered |
| ("\"overlay\" must be followed by the name of an overlay command.\n"); |
| help_list (overlaylist, "overlay ", -1, gdb_stdout); |
| } |
| |
| |
| /* 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, SIZE, LMA, MAPPED}, /# one entry per overlay section #/ |
| {..., ..., ..., ...}, |
| } |
| unsigned _novly_regions; /# number of overlay regions #/ |
| unsigned _ovly_region_table[_novly_regions][3] = { |
| {VMA, SIZE, 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; |
| #if 0 |
| static unsigned (*cache_ovly_region_table)[3] = 0; |
| #endif |
| static unsigned cache_novlys = 0; |
| #if 0 |
| static unsigned cache_novly_regions = 0; |
| #endif |
| static CORE_ADDR cache_ovly_table_base = 0; |
| #if 0 |
| static CORE_ADDR cache_ovly_region_table_base = 0; |
| #endif |
| enum ovly_index |
| { |
| VMA, SIZE, LMA, MAPPED |
| }; |
| #define TARGET_LONG_BYTES (gdbarch_long_bit (current_gdbarch) \ |
| / TARGET_CHAR_BIT) |
| |
| /* Throw away the cached copy of _ovly_table */ |
| static void |
| simple_free_overlay_table (void) |
| { |
| if (cache_ovly_table) |
| xfree (cache_ovly_table); |
| cache_novlys = 0; |
| cache_ovly_table = NULL; |
| cache_ovly_table_base = 0; |
| } |
| |
| #if 0 |
| /* Throw away the cached copy of _ovly_region_table */ |
| static void |
| simple_free_overlay_region_table (void) |
| { |
| if (cache_ovly_region_table) |
| xfree (cache_ovly_region_table); |
| cache_novly_regions = 0; |
| cache_ovly_region_table = NULL; |
| cache_ovly_region_table_base = 0; |
| } |
| #endif |
| |
| /* Read an array of ints 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) |
| { |
| /* FIXME (alloca): Not safe if array is very large. */ |
| gdb_byte *buf = alloca (len * TARGET_LONG_BYTES); |
| int i; |
| |
| read_memory (memaddr, buf, len * TARGET_LONG_BYTES); |
| for (i = 0; i < len; i++) |
| myaddr[i] = extract_unsigned_integer (TARGET_LONG_BYTES * i + buf, |
| TARGET_LONG_BYTES); |
| } |
| |
| /* 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 minimal_symbol *novlys_msym, *ovly_table_msym; |
| |
| simple_free_overlay_table (); |
| novlys_msym = lookup_minimal_symbol ("_novlys", NULL, NULL); |
| if (! novlys_msym) |
| { |
| 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_minimal_symbol ("_ovly_table", NULL, NULL); |
| if (! ovly_table_msym) |
| { |
| error (_("Error reading inferior's overlay table: couldn't find " |
| "`_ovly_table' array\n" |
| "in inferior. Use `overlay manual' mode.")); |
| return 0; |
| } |
| |
| cache_novlys = read_memory_integer (SYMBOL_VALUE_ADDRESS (novlys_msym), 4); |
| cache_ovly_table |
| = (void *) xmalloc (cache_novlys * sizeof (*cache_ovly_table)); |
| cache_ovly_table_base = SYMBOL_VALUE_ADDRESS (ovly_table_msym); |
| read_target_long_array (cache_ovly_table_base, |
| (unsigned int *) cache_ovly_table, |
| cache_novlys * 4); |
| |
| return 1; /* SUCCESS */ |
| } |
| |
| #if 0 |
| /* Find and grab a copy of the target _ovly_region_table |
| (and _novly_regions, which is needed for the table's size) */ |
| static int |
| simple_read_overlay_region_table (void) |
| { |
| struct minimal_symbol *msym; |
| |
| simple_free_overlay_region_table (); |
| msym = lookup_minimal_symbol ("_novly_regions", NULL, NULL); |
| if (msym != NULL) |
| cache_novly_regions = read_memory_integer (SYMBOL_VALUE_ADDRESS (msym), 4); |
| else |
| return 0; /* failure */ |
| cache_ovly_region_table = (void *) xmalloc (cache_novly_regions * 12); |
| if (cache_ovly_region_table != NULL) |
| { |
| msym = lookup_minimal_symbol ("_ovly_region_table", NULL, NULL); |
| if (msym != NULL) |
| { |
| cache_ovly_region_table_base = SYMBOL_VALUE_ADDRESS (msym); |
| read_target_long_array (cache_ovly_region_table_base, |
| (unsigned int *) cache_ovly_region_table, |
| cache_novly_regions * 3); |
| } |
| else |
| return 0; /* failure */ |
| } |
| else |
| return 0; /* failure */ |
| return 1; /* SUCCESS */ |
| } |
| #endif |
| |
| /* 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, size; |
| bfd *obfd = osect->objfile->obfd; |
| asection *bsect = osect->the_bfd_section; |
| |
| size = bfd_get_section_size (osect->the_bfd_section); |
| for (i = 0; i < cache_novlys; i++) |
| if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect) |
| && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect) |
| /* && cache_ovly_table[i][SIZE] == size */ ) |
| { |
| read_target_long_array (cache_ovly_table_base + i * TARGET_LONG_BYTES, |
| (unsigned int *) cache_ovly_table[i], 4); |
| if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect) |
| && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect) |
| /* && cache_ovly_table[i][SIZE] == size */ ) |
| { |
| 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) |
| { |
| struct objfile *objfile; |
| |
| /* 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? */ |
| if (cache_ovly_table_base == |
| SYMBOL_VALUE_ADDRESS (lookup_minimal_symbol ("_ovly_table", NULL, NULL))) |
| /* 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. */ |
| ALL_OBJSECTIONS (objfile, osect) |
| if (section_is_overlay (osect->the_bfd_section)) |
| { |
| int i, size; |
| bfd *obfd = osect->objfile->obfd; |
| asection *bsect = osect->the_bfd_section; |
| |
| size = bfd_get_section_size (bsect); |
| for (i = 0; i < cache_novlys; i++) |
| if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect) |
| && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect) |
| /* && cache_ovly_table[i][SIZE] == size */ ) |
| { /* 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 */ |
| } |
| } |
| } |
| |
| /* Set the output sections and output offsets for section SECTP in |
| ABFD. The relocation code in BFD will read these offsets, so we |
| need to be sure they're initialized. We map each section to itself, |
| with no offset; this means that SECTP->vma will be honored. */ |
| |
| static void |
| symfile_dummy_outputs (bfd *abfd, asection *sectp, void *dummy) |
| { |
| sectp->output_section = sectp; |
| sectp->output_offset = 0; |
| } |
| |
| /* 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. */ |
| |
| bfd_byte * |
| symfile_relocate_debug_section (bfd *abfd, asection *sectp, bfd_byte *buf) |
| { |
| /* We're only interested in debugging sections with relocation |
| information. */ |
| if ((sectp->flags & SEC_RELOC) == 0) |
| return NULL; |
| if ((sectp->flags & SEC_DEBUGGING) == 0) |
| return NULL; |
| |
| /* We will handle section offsets properly elsewhere, so relocate as if |
| all sections begin at 0. */ |
| bfd_map_over_sections (abfd, symfile_dummy_outputs, NULL); |
| |
| return bfd_simple_get_relocated_section_contents (abfd, sectp, buf, NULL); |
| } |
| |
| struct symfile_segment_data * |
| get_symfile_segment_data (bfd *abfd) |
| { |
| struct sym_fns *sf = find_sym_fns (abfd); |
| |
| if (sf == NULL) |
| return NULL; |
| |
| return sf->sym_segments (abfd); |
| } |
| |
| void |
| free_symfile_segment_data (struct symfile_segment_data *data) |
| { |
| xfree (data->segment_bases); |
| xfree (data->segment_sizes); |
| xfree (data->segment_info); |
| xfree (data); |
| } |
| |
| |
| /* 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, then verify that all the excess addresses are |
| the same as the last legitimate one, and then ignore them. This |
| allows "TextSeg=X;DataSeg=X" qOffset replies for files which have |
| only a single segment. */ |
| int |
| symfile_map_offsets_to_segments (bfd *abfd, struct symfile_segment_data *data, |
| struct 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 (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->num_segments > 0); |
| |
| /* Check any extra SEGMENT_BASES entries. */ |
| if (num_segment_bases > data->num_segments) |
| for (i = data->num_segments; i < num_segment_bases; i++) |
| if (segment_bases[i] != segment_bases[data->num_segments - 1]) |
| return 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->num_segments); |
| |
| /* 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->offsets[i] = (segment_bases[which - 1] |
| - data->segment_bases[which - 1]); |
| } |
| |
| return 1; |
| } |
| |
| static void |
| symfile_find_segment_sections (struct objfile *objfile) |
| { |
| bfd *abfd = objfile->obfd; |
| int i; |
| asection *sect; |
| struct symfile_segment_data *data; |
| |
| data = get_symfile_segment_data (objfile->obfd); |
| if (data == NULL) |
| return; |
| |
| if (data->num_segments != 1 && data->num_segments != 2) |
| { |
| free_symfile_segment_data (data); |
| return; |
| } |
| |
| for (i = 0, sect = abfd->sections; sect != NULL; i++, sect = sect->next) |
| { |
| CORE_ADDR vma; |
| 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; |
| } |
| } |
| |
| free_symfile_segment_data (data); |
| } |
| |
| void |
| _initialize_symfile (void) |
| { |
| struct cmd_list_element *c; |
| |
| c = add_cmd ("symbol-file", class_files, symbol_file_command, _("\ |
| Load symbol table from executable file FILE.\n\ |
| The `file' command can also load symbol tables, as well as setting the file\n\ |
| to execute."), &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 ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR> ...]\n\ |
| ADDR is the starting address of the file's text.\n\ |
| The optional arguments are section-name section-address pairs and\n\ |
| should be specified if the data and bss segments are not contiguous\n\ |
| with the text. SECT is a section name to be loaded at SECT_ADDR."), |
| &cmdlist); |
| set_cmd_completer (c, filename_completer); |
| |
| c = add_cmd ("add-shared-symbol-files", class_files, |
| add_shared_symbol_files_command, _("\ |
| Load the symbols from shared objects in the dynamic linker's link map."), |
| &cmdlist); |
| c = add_alias_cmd ("assf", "add-shared-symbol-files", class_files, 1, |
| &cmdlist); |
| |
| c = add_cmd ("load", class_files, load_command, _("\ |
| Dynamically load FILE into the running program, and record its symbols\n\ |
| for access from GDB.\n\ |
| A load OFFSET may also be given."), &cmdlist); |
| set_cmd_completer (c, filename_completer); |
| |
| add_setshow_boolean_cmd ("symbol-reloading", class_support, |
| &symbol_reloading, _("\ |
| Set dynamic symbol table reloading multiple times in one run."), _("\ |
| Show dynamic symbol table reloading multiple times in one run."), NULL, |
| NULL, |
| show_symbol_reloading, |
| &setlist, &showlist); |
| |
| add_prefix_cmd ("overlay", class_support, overlay_command, |
| _("Commands for debugging overlays."), &overlaylist, |
| "overlay ", 0, &cmdlist); |
| |
| add_com_alias ("ovly", "overlay", class_alias, 1); |
| add_com_alias ("ov", "overlay", class_alias, 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: */ |
| init_filename_language_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 directory where separate debug symbols are searched for."), _("\ |
| Show the directory 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\ |
| the global debug-file directory prepended."), |
| NULL, |
| show_debug_file_directory, |
| &setlist, &showlist); |
| } |