| /* Generic symbol file reading for the GNU debugger, GDB. |
| |
| Copyright (C) 1990-2012 Free Software Foundation, Inc. |
| |
| Contributed by Cygnus Support, using pieces from other GDB modules. |
| |
| This file is part of GDB. |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 3 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| |
| #include "defs.h" |
| #include "arch-utils.h" |
| #include "bfdlink.h" |
| #include "symtab.h" |
| #include "gdbtypes.h" |
| #include "gdbcore.h" |
| #include "frame.h" |
| #include "target.h" |
| #include "value.h" |
| #include "symfile.h" |
| #include "objfiles.h" |
| #include "source.h" |
| #include "gdbcmd.h" |
| #include "breakpoint.h" |
| #include "language.h" |
| #include "complaints.h" |
| #include "demangle.h" |
| #include "inferior.h" |
| #include "regcache.h" |
| #include "filenames.h" /* for DOSish file names */ |
| #include "gdb-stabs.h" |
| #include "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 "remote.h" |
| #include "stack.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> |
| |
| #include "psymtab.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. */ |
| |
| 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); |
| |
| bfd *symfile_bfd_open (char *); |
| |
| int get_section_index (struct objfile *, char *); |
| |
| static const struct sym_fns *find_sym_fns (bfd *); |
| |
| static void decrement_reading_symtab (void *); |
| |
| static void overlay_invalidate_all (void); |
| |
| 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, int, |
| enum bfd_endian); |
| |
| 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 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. */ |
| |
| typedef const struct sym_fns *sym_fns_ptr; |
| DEF_VEC_P (sym_fns_ptr); |
| |
| static VEC (sym_fns_ptr) *symtab_fns = NULL; |
| |
| /* 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; |
| |
| |
| /* 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 NULL terminated variable argument list of `const char *' |
| strings; return the new string. Space is found in the OBSTACKP. |
| Argument list must be terminated by a sentinel expression `(char *) |
| NULL'. */ |
| |
| char * |
| obconcat (struct obstack *obstackp, ...) |
| { |
| va_list ap; |
| |
| va_start (ap, obstackp); |
| for (;;) |
| { |
| const char *s = va_arg (ap, const char *); |
| |
| if (s == NULL) |
| break; |
| |
| obstack_grow_str (obstackp, s); |
| } |
| va_end (ap); |
| obstack_1grow (obstackp, 0); |
| |
| return obstack_finish (obstackp); |
| } |
| |
| /* True if we are reading a symbol table. */ |
| |
| int currently_reading_symtab = 0; |
| |
| static void |
| decrement_reading_symtab (void *dummy) |
| { |
| currently_reading_symtab--; |
| } |
| |
| /* Increment currently_reading_symtab and return a cleanup that can be |
| used to decrement it. */ |
| struct cleanup * |
| increment_reading_symtab (void) |
| { |
| ++currently_reading_symtab; |
| return make_cleanup (decrement_reading_symtab, NULL); |
| } |
| |
| /* 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_ALLOC | 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; |
| } |
| |
| /* 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 target_section *start, |
| const struct target_section *end) |
| { |
| struct section_addr_info *sap; |
| const struct target_section *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; |
| } |
| |
| /* Create a section_addr_info from section offsets in ABFD. */ |
| |
| static struct section_addr_info * |
| build_section_addr_info_from_bfd (bfd *abfd) |
| { |
| struct section_addr_info *sap; |
| int i; |
| struct bfd_section *sec; |
| |
| sap = alloc_section_addr_info (bfd_count_sections (abfd)); |
| for (i = 0, sec = abfd->sections; sec != NULL; sec = sec->next) |
| if (bfd_get_section_flags (abfd, sec) & (SEC_ALLOC | SEC_LOAD)) |
| { |
| sap->other[i].addr = bfd_get_section_vma (abfd, sec); |
| sap->other[i].name = xstrdup (bfd_get_section_name (abfd, sec)); |
| sap->other[i].sectindex = sec->index; |
| i++; |
| } |
| return sap; |
| } |
| |
| /* Create a section_addr_info from section offsets in OBJFILE. */ |
| |
| struct section_addr_info * |
| build_section_addr_info_from_objfile (const struct objfile *objfile) |
| { |
| struct section_addr_info *sap; |
| int i; |
| |
| /* Before reread_symbols gets rewritten it is not safe to call: |
| gdb_assert (objfile->num_sections == bfd_count_sections (objfile->obfd)); |
| */ |
| sap = build_section_addr_info_from_bfd (objfile->obfd); |
| for (i = 0; i < sap->num_sections && sap->other[i].name; i++) |
| { |
| int sectindex = sap->other[i].sectindex; |
| |
| sap->other[i].addr += objfile->section_offsets->offsets[sectindex]; |
| } |
| 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. */ |
| |
| static 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; |
| |
| /* 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); |
| } |
| |
| /* Store struct section_addr_info as prepared (made relative and with SECTINDEX |
| filled-in) by addr_info_make_relative into SECTION_OFFSETS of NUM_SECTIONS |
| entries. */ |
| |
| void |
| relative_addr_info_to_section_offsets (struct section_offsets *section_offsets, |
| int num_sections, |
| struct section_addr_info *addrs) |
| { |
| int i; |
| |
| memset (section_offsets, 0, SIZEOF_N_SECTION_OFFSETS (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->sectindex == -1) |
| continue; |
| |
| /* Record all sections in offsets. */ |
| /* The section_offsets in the objfile are here filled in using |
| the BFD index. */ |
| section_offsets->offsets[osp->sectindex] = osp->addr; |
| } |
| } |
| |
| /* Transform section name S for a name comparison. prelink can split section |
| `.bss' into two sections `.dynbss' and `.bss' (in this order). Similarly |
| prelink can split `.sbss' into `.sdynbss' and `.sbss'. Use virtual address |
| of the new `.dynbss' (`.sdynbss') section as the adjacent new `.bss' |
| (`.sbss') section has invalid (increased) virtual address. */ |
| |
| static const char * |
| addr_section_name (const char *s) |
| { |
| if (strcmp (s, ".dynbss") == 0) |
| return ".bss"; |
| if (strcmp (s, ".sdynbss") == 0) |
| return ".sbss"; |
| |
| return s; |
| } |
| |
| /* qsort comparator for addrs_section_sort. Sort entries in ascending order by |
| their (name, sectindex) pair. sectindex makes the sort by name stable. */ |
| |
| static int |
| addrs_section_compar (const void *ap, const void *bp) |
| { |
| const struct other_sections *a = *((struct other_sections **) ap); |
| const struct other_sections *b = *((struct other_sections **) bp); |
| int retval; |
| |
| retval = strcmp (addr_section_name (a->name), addr_section_name (b->name)); |
| if (retval) |
| return retval; |
| |
| return a->sectindex - b->sectindex; |
| } |
| |
| /* Provide sorted array of pointers to sections of ADDRS. The array is |
| terminated by NULL. Caller is responsible to call xfree for it. */ |
| |
| static struct other_sections ** |
| addrs_section_sort (struct section_addr_info *addrs) |
| { |
| struct other_sections **array; |
| int i; |
| |
| /* `+ 1' for the NULL terminator. */ |
| array = xmalloc (sizeof (*array) * (addrs->num_sections + 1)); |
| for (i = 0; i < addrs->num_sections && addrs->other[i].name; i++) |
| array[i] = &addrs->other[i]; |
| array[i] = NULL; |
| |
| qsort (array, i, sizeof (*array), addrs_section_compar); |
| |
| return array; |
| } |
| |
| /* Relativize absolute addresses in ADDRS into offsets based on ABFD. Fill-in |
| also SECTINDEXes specific to ABFD there. This function can be used to |
| rebase ADDRS to start referencing different BFD than before. */ |
| |
| void |
| addr_info_make_relative (struct section_addr_info *addrs, bfd *abfd) |
| { |
| asection *lower_sect; |
| CORE_ADDR lower_offset; |
| int i; |
| struct cleanup *my_cleanup; |
| struct section_addr_info *abfd_addrs; |
| struct other_sections **addrs_sorted, **abfd_addrs_sorted; |
| struct other_sections **addrs_to_abfd_addrs; |
| |
| /* Find lowest loadable section to be used as starting point for |
| continguous sections. */ |
| lower_sect = NULL; |
| bfd_map_over_sections (abfd, find_lowest_section, &lower_sect); |
| if (lower_sect == NULL) |
| { |
| warning (_("no loadable sections found in added symbol-file %s"), |
| bfd_get_filename (abfd)); |
| lower_offset = 0; |
| } |
| else |
| lower_offset = bfd_section_vma (bfd_get_filename (abfd), lower_sect); |
| |
| /* Create ADDRS_TO_ABFD_ADDRS array to map the sections in ADDRS to sections |
| in ABFD. Section names are not unique - there can be multiple sections of |
| the same name. Also the sections of the same name do not have to be |
| adjacent to each other. Some sections may be present only in one of the |
| files. Even sections present in both files do not have to be in the same |
| order. |
| |
| Use stable sort by name for the sections in both files. Then linearly |
| scan both lists matching as most of the entries as possible. */ |
| |
| addrs_sorted = addrs_section_sort (addrs); |
| my_cleanup = make_cleanup (xfree, addrs_sorted); |
| |
| abfd_addrs = build_section_addr_info_from_bfd (abfd); |
| make_cleanup_free_section_addr_info (abfd_addrs); |
| abfd_addrs_sorted = addrs_section_sort (abfd_addrs); |
| make_cleanup (xfree, abfd_addrs_sorted); |
| |
| /* Now create ADDRS_TO_ABFD_ADDRS from ADDRS_SORTED and |
| ABFD_ADDRS_SORTED. */ |
| |
| addrs_to_abfd_addrs = xzalloc (sizeof (*addrs_to_abfd_addrs) |
| * addrs->num_sections); |
| make_cleanup (xfree, addrs_to_abfd_addrs); |
| |
| while (*addrs_sorted) |
| { |
| const char *sect_name = addr_section_name ((*addrs_sorted)->name); |
| |
| while (*abfd_addrs_sorted |
| && strcmp (addr_section_name ((*abfd_addrs_sorted)->name), |
| sect_name) < 0) |
| abfd_addrs_sorted++; |
| |
| if (*abfd_addrs_sorted |
| && strcmp (addr_section_name ((*abfd_addrs_sorted)->name), |
| sect_name) == 0) |
| { |
| int index_in_addrs; |
| |
| /* Make the found item directly addressable from ADDRS. */ |
| index_in_addrs = *addrs_sorted - addrs->other; |
| gdb_assert (addrs_to_abfd_addrs[index_in_addrs] == NULL); |
| addrs_to_abfd_addrs[index_in_addrs] = *abfd_addrs_sorted; |
| |
| /* Never use the same ABFD entry twice. */ |
| abfd_addrs_sorted++; |
| } |
| |
| addrs_sorted++; |
| } |
| |
| /* 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++) |
| { |
| struct other_sections *sect = addrs_to_abfd_addrs[i]; |
| |
| if (sect) |
| { |
| /* This is the index used by BFD. */ |
| addrs->other[i].sectindex = sect->sectindex; |
| |
| if (addrs->other[i].addr != 0) |
| { |
| addrs->other[i].addr -= sect->addr; |
| lower_offset = addrs->other[i].addr; |
| } |
| else |
| addrs->other[i].addr = lower_offset; |
| } |
| else |
| { |
| /* addr_section_name transformation is not used for SECT_NAME. */ |
| const char *sect_name = addrs->other[i].name; |
| |
| /* This section does not exist in ABFD, which is normally |
| unexpected and we want to issue a warning. |
| |
| However, the ELF prelinker does create a few sections which are |
| marked in the main executable as loadable (they are loaded in |
| memory from the DYNAMIC segment) and yet are not present in |
| separate debug info files. This is fine, and should not cause |
| a warning. Shared libraries contain just the section |
| ".gnu.liblist" but it is not marked as loadable there. There is |
| no other way to identify them than by their name as the sections |
| created by prelink have no special flags. |
| |
| For the sections `.bss' and `.sbss' see addr_section_name. */ |
| |
| if (!(strcmp (sect_name, ".gnu.liblist") == 0 |
| || strcmp (sect_name, ".gnu.conflict") == 0 |
| || (strcmp (sect_name, ".bss") == 0 |
| && i > 0 |
| && strcmp (addrs->other[i - 1].name, ".dynbss") == 0 |
| && addrs_to_abfd_addrs[i - 1] != NULL) |
| || (strcmp (sect_name, ".sbss") == 0 |
| && i > 0 |
| && strcmp (addrs->other[i - 1].name, ".sdynbss") == 0 |
| && addrs_to_abfd_addrs[i - 1] != NULL))) |
| warning (_("section %s not found in %s"), sect_name, |
| bfd_get_filename (abfd)); |
| |
| addrs->other[i].addr = 0; |
| addrs->other[i].sectindex = -1; |
| } |
| } |
| |
| do_cleanups (my_cleanup); |
| } |
| |
| /* 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) |
| { |
| 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)); |
| relative_addr_info_to_section_offsets (objfile->section_offsets, |
| objfile->num_sections, addrs); |
| |
| /* For relocatable files, all loadable sections will start at zero. |
| The zero is meaningless, so try to pick arbitrary addresses such |
| that no loadable sections overlap. This algorithm is quadratic, |
| but the number of sections in a single object file is generally |
| small. */ |
| if ((bfd_get_file_flags (objfile->obfd) & (EXEC_P | DYNAMIC)) == 0) |
| { |
| struct place_section_arg arg; |
| bfd *abfd = objfile->obfd; |
| asection *cur_sec; |
| |
| for (cur_sec = abfd->sections; cur_sec != NULL; cur_sec = cur_sec->next) |
| /* We do not expect this to happen; just skip this step if the |
| relocatable file has a section with an assigned VMA. */ |
| if (bfd_section_vma (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]); |
| exec_set_section_address (bfd_get_filename (abfd), |
| cur_sec->index, |
| offsets[cur_sec->index]); |
| offsets[cur_sec->index] = 0; |
| } |
| } |
| } |
| |
| /* Remember the bfd indexes for the .text, .data, .bss and |
| .rodata sections. */ |
| init_objfile_sect_indices (objfile); |
| } |
| |
| |
| /* Divide the file into segments, which are individual relocatable units. |
| This is the default version of the sym_fns.sym_segments function for |
| symbol readers that do not have an explicit representation of segments. |
| It assumes that object files do not have segments, and fully linked |
| files have a single segment. */ |
| |
| 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. |
| |
| ADD_FLAGS encodes verbosity level, whether this is main symbol or |
| an extra symbol file such as dynamically loaded code, and wether |
| breakpoint reset should be deferred. */ |
| |
| void |
| syms_from_objfile (struct objfile *objfile, |
| struct section_addr_info *addrs, |
| struct section_offsets *offsets, |
| int num_offsets, |
| int add_flags) |
| { |
| struct section_addr_info *local_addr = NULL; |
| struct cleanup *old_chain; |
| const int mainline = add_flags & SYMFILE_MAINLINE; |
| |
| 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); |
| gdb_assert (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 (addrs && addrs->other[0].name) |
| addr_info_make_relative (addrs, objfile->obfd); |
| |
| /* Initialize symbol reading routines for this objfile, allow complaints to |
| appear for this new file, and record how verbose to be, then do the |
| initial symbol reading for this file. */ |
| |
| (*objfile->sf->sym_init) (objfile); |
| clear_complaints (&symfile_complaints, 1, add_flags & SYMFILE_VERBOSE); |
| |
| 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); |
| } |
| |
| (*objfile->sf->sym_read) (objfile, add_flags); |
| |
| if ((add_flags & SYMFILE_NO_READ) == 0) |
| require_partial_symbols (objfile, 0); |
| |
| /* Discard cleanups as symbol reading was successful. */ |
| |
| discard_cleanups (old_chain); |
| xfree (local_addr); |
| } |
| |
| /* Perform required actions after either reading in the initial |
| symbols for a new objfile, or mapping in the symbols from a reusable |
| objfile. ADD_FLAGS is a bitmask of enum symfile_add_flags. */ |
| |
| void |
| new_symfile_objfile (struct objfile *objfile, int add_flags) |
| { |
| /* If this is the main symbol file we have to clean up all users of the |
| old main symbol file. Otherwise it is sufficient to fixup all the |
| breakpoints that may have been redefined by this symbol file. */ |
| if (add_flags & SYMFILE_MAINLINE) |
| { |
| /* OK, make it the "real" symbol file. */ |
| symfile_objfile = objfile; |
| |
| clear_symtab_users (add_flags); |
| } |
| else if ((add_flags & SYMFILE_DEFER_BP_RESET) == 0) |
| { |
| breakpoint_re_set (); |
| } |
| |
| /* We're done reading the symbol file; finish off complaints. */ |
| clear_complaints (&symfile_complaints, 0, add_flags & SYMFILE_VERBOSE); |
| } |
| |
| /* 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. |
| |
| ADD_FLAGS encodes verbosity, whether this is main symbol file or |
| extra, such as dynamically loaded code, and what to do with breakpoins. |
| |
| ADDRS, OFFSETS, and NUM_OFFSETS are as described for |
| syms_from_objfile, above. |
| ADDRS is ignored when SYMFILE_MAINLINE bit is set in ADD_FLAGS. |
| |
| PARENT is the original objfile if ABFD is a separate debug info file. |
| Otherwise PARENT is NULL. |
| |
| Upon success, returns a pointer to the objfile that was added. |
| Upon failure, jumps back to command level (never returns). */ |
| |
| static struct objfile * |
| symbol_file_add_with_addrs_or_offsets (bfd *abfd, |
| int add_flags, |
| struct section_addr_info *addrs, |
| struct section_offsets *offsets, |
| int num_offsets, |
| int flags, struct objfile *parent) |
| { |
| struct objfile *objfile; |
| struct cleanup *my_cleanups; |
| const char *name = bfd_get_filename (abfd); |
| const int from_tty = add_flags & SYMFILE_VERBOSE; |
| const int mainline = add_flags & SYMFILE_MAINLINE; |
| const int should_print = ((from_tty || info_verbose) |
| && (readnow_symbol_files |
| || (add_flags & SYMFILE_NO_READ) == 0)); |
| |
| if (readnow_symbol_files) |
| { |
| flags |= OBJF_READNOW; |
| add_flags &= ~SYMFILE_NO_READ; |
| } |
| |
| 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 | (mainline ? OBJF_MAINLINE : 0)); |
| discard_cleanups (my_cleanups); |
| |
| if (parent) |
| add_separate_debug_objfile (objfile, parent); |
| |
| /* We either created a new mapped symbol table, mapped an existing |
| symbol table file which has not had initial symbol reading |
| performed, or need to read an unmapped symbol table. */ |
| if (should_print) |
| { |
| if (deprecated_pre_add_symbol_hook) |
| deprecated_pre_add_symbol_hook (name); |
| else |
| { |
| printf_unfiltered (_("Reading symbols from %s..."), name); |
| wrap_here (""); |
| gdb_flush (gdb_stdout); |
| } |
| } |
| syms_from_objfile (objfile, addrs, offsets, num_offsets, |
| add_flags); |
| |
| /* We now have at least a partial symbol table. Check to see if the |
| user requested that all symbols be read on initial access via either |
| the gdb startup command line or on a per symbol file basis. Expand |
| all partial symbol tables for this objfile if so. */ |
| |
| if ((flags & OBJF_READNOW)) |
| { |
| if (should_print) |
| { |
| printf_unfiltered (_("expanding to full symbols...")); |
| wrap_here (""); |
| gdb_flush (gdb_stdout); |
| } |
| |
| if (objfile->sf) |
| objfile->sf->qf->expand_all_symtabs (objfile); |
| } |
| |
| if (should_print && !objfile_has_symbols (objfile)) |
| { |
| wrap_here (""); |
| printf_unfiltered (_("(no debugging symbols found)...")); |
| wrap_here (""); |
| } |
| |
| if (should_print) |
| { |
| 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); |
| |
| if (objfile->sf == NULL) |
| { |
| observer_notify_new_objfile (objfile); |
| return objfile; /* No symbols. */ |
| } |
| |
| new_symfile_objfile (objfile, add_flags); |
| |
| observer_notify_new_objfile (objfile); |
| |
| bfd_cache_close_all (); |
| return (objfile); |
| } |
| |
| /* Add BFD as a separate debug file for OBJFILE. */ |
| |
| void |
| symbol_file_add_separate (bfd *bfd, int symfile_flags, struct objfile *objfile) |
| { |
| struct objfile *new_objfile; |
| struct section_addr_info *sap; |
| struct cleanup *my_cleanup; |
| |
| /* Create section_addr_info. We can't directly use offsets from OBJFILE |
| because sections of BFD may not match sections of OBJFILE and because |
| vma may have been modified by tools such as prelink. */ |
| sap = build_section_addr_info_from_objfile (objfile); |
| my_cleanup = make_cleanup_free_section_addr_info (sap); |
| |
| new_objfile = symbol_file_add_with_addrs_or_offsets |
| (bfd, symfile_flags, |
| sap, NULL, 0, |
| objfile->flags & (OBJF_REORDERED | OBJF_SHARED | OBJF_READNOW |
| | OBJF_USERLOADED), |
| objfile); |
| |
| do_cleanups (my_cleanup); |
| } |
| |
| /* 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 add_flags, |
| struct section_addr_info *addrs, |
| int flags, struct objfile *parent) |
| { |
| return symbol_file_add_with_addrs_or_offsets (abfd, add_flags, addrs, 0, 0, |
| flags, parent); |
| } |
| |
| |
| /* 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 add_flags, struct section_addr_info *addrs, |
| int flags) |
| { |
| return symbol_file_add_from_bfd (symfile_bfd_open (name), add_flags, addrs, |
| flags, NULL); |
| } |
| |
| |
| /* Call symbol_file_add() with default values and update whatever is |
| affected by the loading of a new main(). |
| Used when the file is supplied in the gdb command line |
| and by some targets with special loading requirements. |
| The auxiliary function, symbol_file_add_main_1(), has the flags |
| argument for the switches that can only be specified in the symbol_file |
| command itself. */ |
| |
| void |
| symbol_file_add_main (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) |
| { |
| const int add_flags = (current_inferior ()->symfile_flags |
| | SYMFILE_MAINLINE | (from_tty ? SYMFILE_VERBOSE : 0)); |
| |
| symbol_file_add (args, add_flags, NULL, flags); |
| |
| /* Getting new symbols may change our opinion about |
| what is frameless. */ |
| reinit_frame_cache (); |
| |
| if ((flags & SYMFILE_NO_READ) == 0) |
| 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.")); |
| |
| /* solib descriptors may have handles to objfiles. Wipe them before their |
| objfiles get stale by free_all_objfiles. */ |
| no_shared_libraries (NULL, from_tty); |
| |
| free_all_objfiles (); |
| |
| gdb_assert (symfile_objfile == NULL); |
| if (from_tty) |
| printf_unfiltered (_("No symbol file now.\n")); |
| } |
| |
| 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; |
| |
| 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; |
| } |
| |
| /* Return 32-bit CRC for ABFD. If successful store it to *FILE_CRC_RETURN and |
| return 1. Otherwise print a warning and return 0. ABFD seek position is |
| not preserved. */ |
| |
| static int |
| get_file_crc (bfd *abfd, unsigned long *file_crc_return) |
| { |
| unsigned long file_crc = 0; |
| |
| if (bfd_seek (abfd, 0, SEEK_SET) != 0) |
| { |
| warning (_("Problem reading \"%s\" for CRC: %s"), |
| bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ())); |
| return 0; |
| } |
| |
| for (;;) |
| { |
| gdb_byte buffer[8 * 1024]; |
| bfd_size_type count; |
| |
| count = bfd_bread (buffer, sizeof (buffer), abfd); |
| if (count == (bfd_size_type) -1) |
| { |
| warning (_("Problem reading \"%s\" for CRC: %s"), |
| bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ())); |
| return 0; |
| } |
| if (count == 0) |
| break; |
| file_crc = gnu_debuglink_crc32 (file_crc, buffer, count); |
| } |
| |
| *file_crc_return = file_crc; |
| return 1; |
| } |
| |
| static int |
| separate_debug_file_exists (const char *name, unsigned long crc, |
| struct objfile *parent_objfile) |
| { |
| unsigned long file_crc; |
| int file_crc_p; |
| bfd *abfd; |
| struct stat parent_stat, abfd_stat; |
| int verified_as_different; |
| |
| /* Find a separate debug info file as if symbols would be present in |
| PARENT_OBJFILE itself this function would not be called. .gnu_debuglink |
| section can contain just the basename of PARENT_OBJFILE without any |
| ".debug" suffix as "/usr/lib/debug/path/to/file" is a separate tree where |
| the separate debug infos with the same basename can exist. */ |
| |
| if (filename_cmp (name, parent_objfile->name) == 0) |
| return 0; |
| |
| abfd = bfd_open_maybe_remote (name); |
| |
| if (!abfd) |
| return 0; |
| |
| /* Verify symlinks were not the cause of filename_cmp name difference above. |
| |
| Some operating systems, e.g. Windows, do not provide a meaningful |
| st_ino; they always set it to zero. (Windows does provide a |
| meaningful st_dev.) Do not indicate a duplicate library in that |
| case. While there is no guarantee that a system that provides |
| meaningful inode numbers will never set st_ino to zero, this is |
| merely an optimization, so we do not need to worry about false |
| negatives. */ |
| |
| if (bfd_stat (abfd, &abfd_stat) == 0 |
| && abfd_stat.st_ino != 0 |
| && bfd_stat (parent_objfile->obfd, &parent_stat) == 0) |
| { |
| if (abfd_stat.st_dev == parent_stat.st_dev |
| && abfd_stat.st_ino == parent_stat.st_ino) |
| { |
| bfd_close (abfd); |
| return 0; |
| } |
| verified_as_different = 1; |
| } |
| else |
| verified_as_different = 0; |
| |
| file_crc_p = get_file_crc (abfd, &file_crc); |
| |
| bfd_close (abfd); |
| |
| if (!file_crc_p) |
| return 0; |
| |
| if (crc != file_crc) |
| { |
| /* If one (or both) the files are accessed for example the via "remote:" |
| gdbserver way it does not support the bfd_stat operation. Verify |
| whether those two files are not the same manually. */ |
| |
| if (!verified_as_different && !parent_objfile->crc32_p) |
| { |
| parent_objfile->crc32_p = get_file_crc (parent_objfile->obfd, |
| &parent_objfile->crc32); |
| if (!parent_objfile->crc32_p) |
| return 0; |
| } |
| |
| if (verified_as_different || parent_objfile->crc32 != file_crc) |
| warning (_("the debug information found in \"%s\"" |
| " does not match \"%s\" (CRC mismatch).\n"), |
| name, parent_objfile->name); |
| |
| return 0; |
| } |
| |
| return 1; |
| } |
| |
| 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 |
| |
| /* Find a separate debuginfo file for OBJFILE, using DIR as the directory |
| where the original file resides (may not be the same as |
| dirname(objfile->name) due to symlinks), and DEBUGLINK as the file we are |
| looking for. Returns the name of the debuginfo, of NULL. */ |
| |
| static char * |
| find_separate_debug_file (const char *dir, |
| const char *canon_dir, |
| const char *debuglink, |
| unsigned long crc32, struct objfile *objfile) |
| { |
| char *debugdir; |
| char *debugfile; |
| int i; |
| VEC (char_ptr) *debugdir_vec; |
| struct cleanup *back_to; |
| int ix; |
| |
| /* Set I to max (strlen (canon_dir), strlen (dir)). */ |
| i = strlen (dir); |
| if (canon_dir != NULL && strlen (canon_dir) > i) |
| i = strlen (canon_dir); |
| |
| debugfile = xmalloc (strlen (debug_file_directory) + 1 |
| + i |
| + strlen (DEBUG_SUBDIRECTORY) |
| + strlen ("/") |
| + strlen (debuglink) |
| + 1); |
| |
| /* First try in the same directory as the original file. */ |
| strcpy (debugfile, dir); |
| strcat (debugfile, debuglink); |
| |
| if (separate_debug_file_exists (debugfile, crc32, objfile)) |
| return debugfile; |
| |
| /* Then try in the subdirectory named DEBUG_SUBDIRECTORY. */ |
| strcpy (debugfile, dir); |
| strcat (debugfile, DEBUG_SUBDIRECTORY); |
| strcat (debugfile, "/"); |
| strcat (debugfile, debuglink); |
| |
| if (separate_debug_file_exists (debugfile, crc32, objfile)) |
| return debugfile; |
| |
| /* Then try in the global debugfile directories. |
| |
| Keep backward compatibility so that DEBUG_FILE_DIRECTORY being "" will |
| cause "/..." lookups. */ |
| |
| debugdir_vec = dirnames_to_char_ptr_vec (debug_file_directory); |
| back_to = make_cleanup_free_char_ptr_vec (debugdir_vec); |
| |
| for (ix = 0; VEC_iterate (char_ptr, debugdir_vec, ix, debugdir); ++ix) |
| { |
| strcpy (debugfile, debugdir); |
| strcat (debugfile, "/"); |
| strcat (debugfile, dir); |
| strcat (debugfile, debuglink); |
| |
| if (separate_debug_file_exists (debugfile, crc32, objfile)) |
| return debugfile; |
| |
| /* If the file is in the sysroot, try using its base path in the |
| global debugfile directory. */ |
| if (canon_dir != NULL |
| && filename_ncmp (canon_dir, gdb_sysroot, |
| strlen (gdb_sysroot)) == 0 |
| && IS_DIR_SEPARATOR (canon_dir[strlen (gdb_sysroot)])) |
| { |
| strcpy (debugfile, debugdir); |
| strcat (debugfile, canon_dir + strlen (gdb_sysroot)); |
| strcat (debugfile, "/"); |
| strcat (debugfile, debuglink); |
| |
| if (separate_debug_file_exists (debugfile, crc32, objfile)) |
| return debugfile; |
| } |
| } |
| |
| do_cleanups (back_to); |
| xfree (debugfile); |
| return NULL; |
| } |
| |
| /* Modify PATH to contain only "directory/" part of PATH. |
| If there were no directory separators in PATH, PATH will be empty |
| string on return. */ |
| |
| static void |
| terminate_after_last_dir_separator (char *path) |
| { |
| int i; |
| |
| /* Strip off the final filename part, leaving the directory name, |
| followed by a slash. The directory can be relative or absolute. */ |
| for (i = strlen(path) - 1; i >= 0; i--) |
| if (IS_DIR_SEPARATOR (path[i])) |
| break; |
| |
| /* If I is -1 then no directory is present there and DIR will be "". */ |
| path[i + 1] = '\0'; |
| } |
| |
| /* Find separate debuginfo for OBJFILE (using .gnu_debuglink section). |
| Returns pathname, or NULL. */ |
| |
| char * |
| find_separate_debug_file_by_debuglink (struct objfile *objfile) |
| { |
| char *debuglink; |
| char *dir, *canon_dir; |
| char *debugfile; |
| unsigned long crc32; |
| struct cleanup *cleanups; |
| |
| debuglink = get_debug_link_info (objfile, &crc32); |
| |
| if (debuglink == NULL) |
| { |
| /* There's no separate debug info, hence there's no way we could |
| load it => no warning. */ |
| return NULL; |
| } |
| |
| cleanups = make_cleanup (xfree, debuglink); |
| dir = xstrdup (objfile->name); |
| make_cleanup (xfree, dir); |
| terminate_after_last_dir_separator (dir); |
| canon_dir = lrealpath (dir); |
| |
| debugfile = find_separate_debug_file (dir, canon_dir, debuglink, |
| crc32, objfile); |
| xfree (canon_dir); |
| |
| if (debugfile == NULL) |
| { |
| #ifdef HAVE_LSTAT |
| /* For PR gdb/9538, try again with realpath (if different from the |
| original). */ |
| |
| struct stat st_buf; |
| |
| if (lstat (objfile->name, &st_buf) == 0 && S_ISLNK(st_buf.st_mode)) |
| { |
| char *symlink_dir; |
| |
| symlink_dir = lrealpath (objfile->name); |
| if (symlink_dir != NULL) |
| { |
| make_cleanup (xfree, symlink_dir); |
| terminate_after_last_dir_separator (symlink_dir); |
| if (strcmp (dir, symlink_dir) != 0) |
| { |
| /* Different directory, so try using it. */ |
| debugfile = find_separate_debug_file (symlink_dir, |
| symlink_dir, |
| debuglink, |
| crc32, |
| objfile); |
| } |
| } |
| } |
| #endif /* HAVE_LSTAT */ |
| } |
| |
| do_cleanups (cleanups); |
| return debugfile; |
| } |
| |
| |
| /* 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 = gdb_buildargv (args); |
| int flags = OBJF_USERLOADED; |
| struct cleanup *cleanups; |
| char *name = NULL; |
| |
| 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) |
| { |
| enum language lang = language_unknown; |
| |
| if (language_of_main != language_unknown) |
| lang = language_of_main; |
| else |
| { |
| const char *filename; |
| |
| filename = find_main_filename (); |
| if (filename != NULL) |
| lang = deduce_language_from_filename (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. */ |
| } |
| |
| /* If NAME is a remote name open the file using remote protocol, otherwise |
| open it normally. */ |
| |
| bfd * |
| bfd_open_maybe_remote (const char *name) |
| { |
| if (remote_filename_p (name)) |
| return remote_bfd_open (name, gnutarget); |
| else |
| return bfd_openr (name, gnutarget); |
| } |
| |
| |
| /* 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; |
| |
| if (remote_filename_p (name)) |
| { |
| name = xstrdup (name); |
| sym_bfd = remote_bfd_open (name, gnutarget); |
| if (!sym_bfd) |
| { |
| make_cleanup (xfree, name); |
| error (_("`%s': can't open to read symbols: %s."), name, |
| bfd_errmsg (bfd_get_error ())); |
| } |
| |
| if (!bfd_check_format (sym_bfd, bfd_object)) |
| { |
| bfd_close (sym_bfd); |
| make_cleanup (xfree, name); |
| error (_("`%s': can't read symbols: %s."), name, |
| bfd_errmsg (bfd_get_error ())); |
| } |
| |
| return sym_bfd; |
| } |
| |
| 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, &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, &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) |
| { |
| 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 ())); |
| } |
| |
| /* bfd_usrdata exists for applications and libbfd must not touch it. */ |
| gdb_assert (bfd_usrdata (sym_bfd) == NULL); |
| |
| 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 reader is prepared to handle. */ |
| |
| void |
| add_symtab_fns (const struct sym_fns *sf) |
| { |
| VEC_safe_push (sym_fns_ptr, 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 const struct sym_fns * |
| find_sym_fns (bfd *abfd) |
| { |
| const struct sym_fns *sf; |
| enum bfd_flavour our_flavour = bfd_get_flavour (abfd); |
| int i; |
| |
| if (our_flavour == bfd_target_srec_flavour |
| || our_flavour == bfd_target_ihex_flavour |
| || our_flavour == bfd_target_tekhex_flavour) |
| return NULL; /* No symbols. */ |
| |
| for (i = 0; VEC_iterate (sym_fns_ptr, symtab_fns, i, sf); ++i) |
| 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) |
| { |
| dont_repeat (); |
| |
| /* The user might be reloading because the binary has changed. Take |
| this opportunity to check. */ |
| reopen_exec_file (); |
| reread_symbols (); |
| |
| 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; |
| } |
| } |
| |
| 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 (current_uiout, 0, "Loading section %s, size %s lma %s\n", |
| args->section_name, hex_string (args->section_size), |
| paddress (target_gdbarch, args->lma)); |
| return; |
| } |
| |
| if (validate_download) |
| { |
| /* Broken memories and broken monitors manifest themselves here |
| when bring new computers to life. This doubles already slow |
| downloads. */ |
| /* NOTE: cagney/1999-10-18: A more efficient implementation |
| might add a verify_memory() method to the target vector and |
| then use that. remote.c could implement that method using |
| the ``qCRC'' packet. */ |
| gdb_byte *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 %s"), |
| paddress (target_gdbarch, args->lma)); |
| if (memcmp (args->buffer, check, bytes) != 0) |
| error (_("Download verify compare failed at %s"), |
| paddress (target_gdbarch, 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; |
| struct ui_out *uiout = current_uiout; |
| |
| 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); |
| |
| if (args == NULL) |
| error_no_arg (_("file to load")); |
| |
| argv = gdb_buildargv (args); |
| 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", "%s", paddress (target_gdbarch, 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. */ |
| regcache_write_pc (get_current_regcache (), entry); |
| |
| /* Reset breakpoints, now that we have changed the load image. For |
| instance, breakpoints may have been set (or reset, by |
| post_create_inferior) while connected to the target but before we |
| loaded the program. In that case, the prologue analyzer could |
| have read instructions from the target to find the right |
| breakpoint locations. Loading has changed the contents of that |
| memory. */ |
| |
| breakpoint_re_set (); |
| |
| /* 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; |
| struct ui_out *uiout = current_uiout; |
| |
| /* 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) |
| { |
| struct gdbarch *gdbarch = get_current_arch (); |
| char *filename = NULL; |
| int flags = OBJF_USERLOADED; |
| char *arg; |
| 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 = gdb_buildargv (args); |
| make_cleanup_freeargv (argv); |
| |
| 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>" |
| " [-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, |
| paddress (gdbarch, 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 ? SYMFILE_VERBOSE : 0, |
| section_addrs, flags); |
| |
| /* Getting new symbols may change our opinion about what is |
| frameless. */ |
| reinit_frame_cache (); |
| do_cleanups (my_cleanups); |
| } |
| |
| |
| typedef struct objfile *objfilep; |
| |
| DEF_VEC_P (objfilep); |
| |
| /* Re-read symbols if a symbol-file has changed. */ |
| void |
| reread_symbols (void) |
| { |
| struct objfile *objfile; |
| long new_modtime; |
| struct stat new_statbuf; |
| int res; |
| VEC (objfilep) *new_objfiles = NULL; |
| struct cleanup *all_cleanups; |
| |
| all_cleanups = make_cleanup (VEC_cleanup (objfilep), &new_objfiles); |
| |
| /* 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) |
| { |
| /* solib-sunos.c creates one objfile with obfd. */ |
| if (objfile->obfd == NULL) |
| continue; |
| |
| /* Separate debug objfiles are handled in the main objfile. */ |
| if (objfile->separate_debug_objfile_backlink) |
| continue; |
| |
| /* If this object is from an archive (what you usually create with |
| `ar', often called a `static library' on most systems, though |
| a `shared library' on AIX is also an archive), then you should |
| stat on the archive name, not member name. */ |
| if (objfile->obfd->my_archive) |
| res = stat (objfile->obfd->my_archive->filename, &new_statbuf); |
| else |
| 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*/); |
| |
| if (exec_bfd != NULL |
| && filename_cmp (bfd_get_filename (objfile->obfd), |
| bfd_get_filename (exec_bfd)) == 0) |
| { |
| /* Reload EXEC_BFD without asking anything. */ |
| |
| exec_file_attach (bfd_get_filename (objfile->obfd), 0); |
| } |
| |
| /* Keep the calls order approx. the same as in free_objfile. */ |
| |
| /* Free the separate debug objfiles. It will be |
| automatically recreated by sym_read. */ |
| free_objfile_separate_debug (objfile); |
| |
| /* Remove any references to this objfile in the global |
| value lists. */ |
| preserve_values (objfile); |
| |
| /* Nuke all the state that we will re-read. Much of the following |
| code which sets things to NULL really is necessary to tell |
| other parts of GDB that there is nothing currently there. |
| |
| Try to keep the freeing order compatible with free_objfile. */ |
| |
| if (objfile->sf != NULL) |
| { |
| (*objfile->sf->sym_finish) (objfile); |
| } |
| |
| clear_objfile_data (objfile); |
| |
| /* Clean up any state BFD has sitting around. 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_open_maybe_remote (obfd_filename); |
| if (objfile->obfd == NULL) |
| error (_("Can't open %s to read symbols."), objfile->name); |
| else |
| objfile->obfd = gdb_bfd_ref (objfile->obfd); |
| /* 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)); |
| |
| /* 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. */ |
| psymbol_bcache_free (objfile->psymbol_cache); |
| objfile->psymbol_cache = psymbol_bcache_init (); |
| bcache_xfree (objfile->macro_cache); |
| objfile->macro_cache = bcache_xmalloc (NULL, NULL); |
| bcache_xfree (objfile->filename_cache); |
| objfile->filename_cache = bcache_xmalloc (NULL,NULL); |
| 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->psymtabs_addrmap = NULL; |
| objfile->free_psymtabs = NULL; |
| objfile->template_symbols = 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)); |
| |
| /* 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); |
| build_objfile_section_table (objfile); |
| 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); |
| /* Do not set flags as this is safe and we don't want to be |
| verbose. */ |
| (*objfile->sf->sym_read) (objfile, 0); |
| if ((objfile->flags & OBJF_PSYMTABS_READ) != 0) |
| { |
| objfile->flags &= ~OBJF_PSYMTABS_READ; |
| require_partial_symbols (objfile, 0); |
| } |
| |
| if (!objfile_has_symbols (objfile)) |
| { |
| wrap_here (""); |
| printf_unfiltered (_("(no debugging symbols found)\n")); |
| wrap_here (""); |
| } |
| |
| /* 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; |
| init_entry_point_info (objfile); |
| |
| VEC_safe_push (objfilep, new_objfiles, objfile); |
| } |
| } |
| |
| if (new_objfiles) |
| { |
| int ix; |
| |
| /* Notify objfiles that we've modified objfile sections. */ |
| objfiles_changed (); |
| |
| clear_symtab_users (0); |
| |
| /* clear_objfile_data for each objfile was called before freeing it and |
| observer_notify_new_objfile (NULL) has been called by |
| clear_symtab_users above. Notify the new files now. */ |
| for (ix = 0; VEC_iterate (objfilep, new_objfiles, ix, objfile); ix++) |
| observer_notify_new_objfile (objfile); |
| |
| /* At least one objfile has changed, so we can consider that |
| the executable we're debugging has changed too. */ |
| observer_notify_executable_changed (); |
| } |
| |
| do_cleanups (all_cleanups); |
| } |
| |
| |
| |
| 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 (".d", language_d); |
| 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 (".for", language_fortran); |
| add_filename_language (".FOR", language_fortran); |
| add_filename_language (".ftn", language_fortran); |
| add_filename_language (".FTN", language_fortran); |
| add_filename_language (".fpp", language_fortran); |
| add_filename_language (".FPP", language_fortran); |
| add_filename_language (".f90", language_fortran); |
| add_filename_language (".F90", language_fortran); |
| add_filename_language (".f95", language_fortran); |
| add_filename_language (".F95", language_fortran); |
| add_filename_language (".f03", language_fortran); |
| add_filename_language (".F03", language_fortran); |
| add_filename_language (".f08", language_fortran); |
| add_filename_language (".F08", 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); |
| add_filename_language (".dg", language_ada); |
| } |
| } |
| |
| enum language |
| deduce_language_from_filename (const 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 |
| */ |
| |
| struct symtab * |
| allocate_symtab (const 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 = (char *) bcache (filename, strlen (filename) + 1, |
| objfile->filename_cache); |
| symtab->fullname = NULL; |
| symtab->language = deduce_language_from_filename (filename); |
| symtab->debugformat = "unknown"; |
| |
| /* Hook it to the objfile it comes from. */ |
| |
| symtab->objfile = objfile; |
| symtab->next = objfile->symtabs; |
| objfile->symtabs = symtab; |
| |
| if (symtab_create_debug) |
| { |
| /* Be a bit clever with debugging messages, and don't print objfile |
| every time, only when it changes. */ |
| static char *last_objfile_name = NULL; |
| |
| if (last_objfile_name == NULL |
| || strcmp (last_objfile_name, objfile->name) != 0) |
| { |
| xfree (last_objfile_name); |
| last_objfile_name = xstrdup (objfile->name); |
| fprintf_unfiltered (gdb_stdlog, |
| "Creating one or more symtabs for objfile %s ...\n", |
| last_objfile_name); |
| } |
| fprintf_unfiltered (gdb_stdlog, |
| "Created symtab 0x%lx for module %s.\n", |
| (long) symtab, filename); |
| } |
| |
| return (symtab); |
| } |
| |
| |
| /* Reset all data structures in gdb which may contain references to symbol |
| table data. ADD_FLAGS is a bitmask of enum symfile_add_flags. */ |
| |
| void |
| clear_symtab_users (int add_flags) |
| { |
| /* Someday, we should do better than this, by only blowing away |
| the things that really need to be blown. */ |
| |
| /* Clear the "current" symtab first, because it is no longer valid. |
| breakpoint_re_set may try to access the current symtab. */ |
| clear_current_source_symtab_and_line (); |
| |
| clear_displays (); |
| if ((add_flags & SYMFILE_DEFER_BP_RESET) == 0) |
| breakpoint_re_set (); |
| clear_last_displayed_sal (); |
| 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 (0); |
| } |
| |
| /* OVERLAYS: |
| The following code implements an abstraction for debugging overlay sections. |
| |
| The target model is as follows: |
| 1) The gnu linker will permit multiple sections to be mapped into the |
| same VMA, each with its own unique LMA (or load address). |
| 2) It is assumed that some runtime mechanism exists for mapping the |
| sections, one by one, from the load address into the VMA address. |
| 3) This code provides a mechanism for gdb to keep track of which |
| sections should be considered to be mapped from the VMA to the LMA. |
| This information is used for symbol lookup, and memory read/write. |
| For instance, if a section has been mapped then its contents |
| should be read from the VMA, otherwise from the LMA. |
| |
| Two levels of debugger support for overlays are available. One is |
| "manual", in which the debugger relies on the user to tell it which |
| overlays are currently mapped. This level of support is |
| implemented entirely in the core debugger, and the information about |
| whether a section is mapped is kept in the objfile->obj_section table. |
| |
| The second level of support is "automatic", and is only available if |
| the target-specific code provides functionality to read the target's |
| overlay mapping table, and translate its contents for the debugger |
| (by updating the mapped state information in the obj_section tables). |
| |
| The interface is as follows: |
| User commands: |
| overlay map <name> -- tell gdb to consider this section mapped |
| overlay unmap <name> -- tell gdb to consider this section unmapped |
| overlay list -- list the sections that GDB thinks are mapped |
| overlay read-target -- get the target's state of what's mapped |
| overlay off/manual/auto -- set overlay debugging state |
| Functional interface: |
| find_pc_mapped_section(pc): if the pc is in the range of a mapped |
| section, return that section. |
| find_pc_overlay(pc): find any overlay section that contains |
| the pc, either in its VMA or its LMA |
| section_is_mapped(sect): true if overlay is marked as mapped |
| section_is_overlay(sect): true if section's VMA != LMA |
| pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA |
| pc_in_unmapped_range(...): true if pc belongs to section's LMA |
| sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap |
| overlay_mapped_address(...): map an address from section's LMA to VMA |
| overlay_unmapped_address(...): map an address from section's VMA to LMA |
| symbol_overlayed_address(...): Return a "current" address for symbol: |
| either in VMA or LMA depending on whether |
| the symbol's section is currently mapped. */ |
| |
| /* Overlay debugging state: */ |
| |
| enum overlay_debugging_state overlay_debugging = ovly_off; |
| int overlay_cache_invalid = 0; /* True if need to refresh mapped state. */ |
| |
| /* Function: section_is_overlay (SECTION) |
| Returns true if SECTION has VMA not equal to LMA, ie. |
| SECTION is loaded at an address different from where it will "run". */ |
| |
| int |
| section_is_overlay (struct obj_section *section) |
| { |
| if (overlay_debugging && section) |
| { |
| bfd *abfd = section->objfile->obfd; |
| asection *bfd_section = section->the_bfd_section; |
| |
| if (bfd_section_lma (abfd, bfd_section) != 0 |
| && bfd_section_lma (abfd, bfd_section) |
| != bfd_section_vma (abfd, bfd_section)) |
| return 1; |
| } |
| |
| return 0; |
| } |
| |
| /* Function: overlay_invalidate_all (void) |
| Invalidate the mapped state of all overlay sections (mark it as stale). */ |
| |
| static void |
| overlay_invalidate_all (void) |
| { |
| struct objfile *objfile; |
| struct obj_section *sect; |
| |
| ALL_OBJSECTIONS (objfile, sect) |
| if (section_is_overlay (sect)) |
| sect->ovly_mapped = -1; |
| } |
| |
| /* Function: section_is_mapped (SECTION) |
| Returns true if section is an overlay, and is currently mapped. |
| |
| Access to the ovly_mapped flag is restricted to this function, so |
| that we can do automatic update. If the global flag |
| OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call |
| overlay_invalidate_all. If the mapped state of the particular |
| section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */ |
| |
| int |
| section_is_mapped (struct obj_section *osect) |
| { |
| struct gdbarch *gdbarch; |
| |
| if (osect == 0 || !section_is_overlay (osect)) |
| return 0; |
| |
| switch (overlay_debugging) |
| { |
| default: |
| case ovly_off: |
| return 0; /* overlay debugging off */ |
| case ovly_auto: /* overlay debugging automatic */ |
| /* Unles there is a gdbarch_overlay_update function, |
| there's really nothing useful to do here (can't really go auto). */ |
| gdbarch = get_objfile_arch (osect->objfile); |
| if (gdbarch_overlay_update_p (gdbarch)) |
| { |
| if (overlay_cache_invalid) |
| { |
| overlay_invalidate_all (); |
| overlay_cache_invalid = 0; |
| } |
| if (osect->ovly_mapped == -1) |
| gdbarch_overlay_update (gdbarch, osect); |
| } |
| /* fall thru to manual case */ |
| case ovly_on: /* overlay debugging manual */ |
| return osect->ovly_mapped == 1; |
| } |
| } |
| |
| /* Function: pc_in_unmapped_range |
| If PC falls into the lma range of SECTION, return true, else false. */ |
| |
| CORE_ADDR |
| pc_in_unmapped_range (CORE_ADDR pc, struct obj_section *section) |
| { |
| if (section_is_overlay (section)) |
| { |
| bfd *abfd = section->objfile->obfd; |
| asection *bfd_section = section->the_bfd_section; |
| |
| /* We assume the LMA is relocated by the same offset as the VMA. */ |
| bfd_vma size = bfd_get_section_size (bfd_section); |
| CORE_ADDR offset = obj_section_offset (section); |
| |
| if (bfd_get_section_lma (abfd, bfd_section) + offset <= pc |
| && pc < bfd_get_section_lma (abfd, bfd_section) + offset + size) |
| return 1; |
| } |
| |
| return 0; |
| } |
| |
| /* Function: pc_in_mapped_range |
| If PC falls into the vma range of SECTION, return true, else false. */ |
| |
| CORE_ADDR |
| pc_in_mapped_range (CORE_ADDR pc, struct obj_section *section) |
| { |
| if (section_is_overlay (section)) |
| { |
| if (obj_section_addr (section) <= pc |
| && pc < obj_section_endaddr (section)) |
| return 1; |
| } |
| |
| return 0; |
| } |
| |
| |
| /* Return true if the mapped ranges of sections A and B overlap, false |
| otherwise. */ |
| static int |
| sections_overlap (struct obj_section *a, struct obj_section *b) |
| { |
| CORE_ADDR a_start = obj_section_addr (a); |
| CORE_ADDR a_end = obj_section_endaddr (a); |
| CORE_ADDR b_start = obj_section_addr (b); |
| CORE_ADDR b_end = obj_section_endaddr (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, struct obj_section *section) |
| { |
| if (section_is_overlay (section) && pc_in_mapped_range (pc, section)) |
| { |
| bfd *abfd = section->objfile->obfd; |
| asection *bfd_section = section->the_bfd_section; |
| |
| return pc + bfd_section_lma (abfd, bfd_section) |
| - bfd_section_vma (abfd, bfd_section); |
| } |
| |
| return pc; |
| } |
| |
| /* Function: overlay_mapped_address (PC, SECTION) |
| Returns the address corresponding to PC in the mapped (runtime) range. |
| May be the same as PC. */ |
| |
| CORE_ADDR |
| overlay_mapped_address (CORE_ADDR pc, struct obj_section *section) |
| { |
| if (section_is_overlay (section) && pc_in_unmapped_range (pc, section)) |
| { |
| bfd *abfd = section->objfile->obfd; |
| asection *bfd_section = section->the_bfd_section; |
| |
| return pc + bfd_section_vma (abfd, bfd_section) |
| - bfd_section_lma (abfd, bfd_section); |
| } |
| |
| return pc; |
| } |
| |
| |
| /* Function: symbol_overlayed_address |
| Return one of two addresses (relative to the VMA or to the LMA), |
| depending on whether the section is mapped or not. */ |
| |
| CORE_ADDR |
| symbol_overlayed_address (CORE_ADDR address, struct obj_section *section) |
| { |
| if (overlay_debugging) |
| { |
| /* If the symbol has no section, just return its regular address. */ |
| if (section == 0) |
| return address; |
| /* If the symbol's section is not an overlay, just return its |
| address. */ |
| if (!section_is_overlay (section)) |
| return address; |
| /* If the symbol's section is mapped, just return its address. */ |
| if (section_is_mapped (section)) |
| return address; |
| /* |
| * HOWEVER: if the symbol is in an overlay section which is NOT mapped, |
| * then return its LOADED address rather than its vma address!! |
| */ |
| return overlay_unmapped_address (address, section); |
| } |
| return address; |
| } |
| |
| /* Function: find_pc_overlay (PC) |
| Return the best-match overlay section for PC: |
| If PC matches a mapped overlay section's VMA, return that section. |
| Else if PC matches an unmapped section's VMA, return that section. |
| Else if PC matches an unmapped section's LMA, return that section. */ |
| |
| struct obj_section * |
| find_pc_overlay (CORE_ADDR pc) |
| { |
| struct objfile *objfile; |
| struct obj_section *osect, *best_match = NULL; |
| |
| if (overlay_debugging) |
| ALL_OBJSECTIONS (objfile, osect) |
| if (section_is_overlay (osect)) |
| { |
| if (pc_in_mapped_range (pc, osect)) |
| { |
| if (section_is_mapped (osect)) |
| return osect; |
| else |
| best_match = osect; |
| } |
| else if (pc_in_unmapped_range (pc, osect)) |
| best_match = osect; |
| } |
| return best_match; |
| } |
| |
| /* Function: find_pc_mapped_section (PC) |
| If PC falls into the VMA address range of an overlay section that is |
| currently marked as MAPPED, return that section. Else return NULL. */ |
| |
| struct obj_section * |
| find_pc_mapped_section (CORE_ADDR pc) |
| { |
| struct objfile *objfile; |
| struct obj_section *osect; |
| |
| if (overlay_debugging) |
| ALL_OBJSECTIONS (objfile, osect) |
| if (pc_in_mapped_range (pc, osect) && section_is_mapped (osect)) |
| return osect; |
| |
| return NULL; |
| } |
| |
| /* Function: list_overlays_command |
| Print a list of mapped sections and their PC ranges. */ |
| |
| 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 (section_is_mapped (osect)) |
| { |
| struct gdbarch *gdbarch = get_objfile_arch (objfile); |
| 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 (gdbarch, lma), gdb_stdout); |
| puts_filtered (" - "); |
| fputs_filtered (paddress (gdbarch, lma + size), gdb_stdout); |
| printf_filtered (", mapped at "); |
| fputs_filtered (paddress (gdbarch, vma), gdb_stdout); |
| puts_filtered (<
|