X-Git-Url: http://git.efficios.com/?a=blobdiff_plain;f=gdb%2Fsymfile.c;h=5e554fed56e55f6cd49314b4c0fe44a720763ef6;hb=7f6ef0c0b8517b25e34e9f5c1208afefef50aec9;hp=4523b4b98bc74f1379fe9e9fe06e6cddf9210c83;hpb=2711e4564f4ab411bdf2cedff3fb92abadd630b8;p=deliverable%2Fbinutils-gdb.git
diff --git a/gdb/symfile.c b/gdb/symfile.c
index 4523b4b98b..5e554fed56 100644
--- a/gdb/symfile.c
+++ b/gdb/symfile.c
@@ -1,7 +1,7 @@
/* Generic symbol file reading for the GNU debugger, GDB.
Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
- 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
+ 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
Free Software Foundation, Inc.
Contributed by Cygnus Support, using pieces from other GDB modules.
@@ -10,7 +10,7 @@
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 2 of the License, or
+ 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,
@@ -19,9 +19,7 @@
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, write to the Free Software
- Foundation, Inc., 51 Franklin Street, Fifth Floor,
- Boston, MA 02110-1301, USA. */
+ along with this program. If not, see . */
#include "defs.h"
#include "bfdlink.h"
@@ -53,6 +51,8 @@
#include "exec.h"
#include "parser-defs.h"
#include "varobj.h"
+#include "elf-bfd.h"
+#include "solib.h"
#include
#include
@@ -71,7 +71,6 @@ void (*deprecated_show_load_progress) (const char *section,
unsigned long total_size);
void (*deprecated_pre_add_symbol_hook) (const char *);
void (*deprecated_post_add_symbol_hook) (void);
-void (*deprecated_target_new_objfile_hook) (struct objfile *);
static void clear_symtab_users_cleanup (void *ignore);
@@ -89,8 +88,6 @@ static int simple_read_overlay_region_table (void);
static void simple_free_overlay_region_table (void);
#endif
-static void set_initial_language (void);
-
static void load_command (char *, int);
static void symbol_file_add_main_1 (char *args, int from_tty, int flags);
@@ -107,7 +104,7 @@ bfd *symfile_bfd_open (char *);
int get_section_index (struct objfile *, char *);
-static void find_sym_fns (struct objfile *);
+static struct sym_fns *find_sym_fns (bfd *);
static void decrement_reading_symtab (void *);
@@ -147,6 +144,8 @@ static char *find_separate_debug_file (struct objfile *objfile);
static void init_filename_language_table (void);
+static void symfile_find_segment_sections (struct objfile *objfile);
+
void _initialize_symfile (void);
/* List of all available sym_fns. On gdb startup, each object file reader
@@ -431,12 +430,19 @@ init_objfile_sect_indices (struct objfile *objfile)
/* 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. 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. */
+ 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++)
{
@@ -640,6 +646,70 @@ default_symfile_offsets (struct objfile *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.
@@ -686,7 +756,7 @@ syms_from_objfile (struct objfile *objfile,
gdb_assert (! (addrs && offsets));
init_entry_point_info (objfile);
- find_sym_fns (objfile);
+ objfile->sf = find_sym_fns (objfile->obfd);
if (objfile->sf == NULL)
return; /* No symbols. */
@@ -947,7 +1017,7 @@ symbol_file_add_with_addrs_or_offsets (bfd *abfd, int from_tty,
{
struct objfile *objfile;
struct partial_symtab *psymtab;
- char *debugfile;
+ char *debugfile = NULL;
struct section_addr_info *orig_addrs = NULL;
struct cleanup *my_cleanups;
const char *name = bfd_get_filename (abfd);
@@ -1011,7 +1081,11 @@ symbol_file_add_with_addrs_or_offsets (bfd *abfd, int from_tty,
}
}
- debugfile = find_separate_debug_file (objfile);
+ /* If the file has its own symbol tables it has no separate debug info.
+ `.dynsym'/`.symtab' go to MSYMBOLS, `.debug_info' goes to SYMTABS/PSYMTABS.
+ `.gnu_debuglink' may no longer be present with `.note.gnu.build-id'. */
+ if (objfile->psymtabs == NULL)
+ debugfile = find_separate_debug_file (objfile);
if (debugfile)
{
if (addrs != NULL)
@@ -1067,8 +1141,7 @@ symbol_file_add_with_addrs_or_offsets (bfd *abfd, int from_tty,
new_symfile_objfile (objfile, mainline, from_tty);
- if (deprecated_target_new_objfile_hook)
- deprecated_target_new_objfile_hook (objfile);
+ observer_notify_new_objfile (objfile);
bfd_cache_close_all ();
return (objfile);
@@ -1145,15 +1218,104 @@ symbol_file_clear (int from_tty)
storage has just been released, we'd better wipe the solib
descriptors as well.
*/
-#if defined(SOLIB_RESTART)
- SOLIB_RESTART ();
-#endif
+ no_shared_libraries (NULL, from_tty);
symfile_objfile = NULL;
if (from_tty)
printf_unfiltered (_("No symbol file now.\n"));
}
+struct build_id
+ {
+ size_t size;
+ gdb_byte data[1];
+ };
+
+/* Locate NT_GNU_BUILD_ID from ABFD and return its content. */
+
+static struct build_id *
+build_id_bfd_get (bfd *abfd)
+{
+ struct build_id *retval;
+
+ if (!bfd_check_format (abfd, bfd_object)
+ || bfd_get_flavour (abfd) != bfd_target_elf_flavour
+ || elf_tdata (abfd)->build_id == NULL)
+ return NULL;
+
+ retval = xmalloc (sizeof *retval - 1 + elf_tdata (abfd)->build_id_size);
+ retval->size = elf_tdata (abfd)->build_id_size;
+ memcpy (retval->data, elf_tdata (abfd)->build_id, retval->size);
+
+ return retval;
+}
+
+/* Return if FILENAME has NT_GNU_BUILD_ID matching the CHECK value. */
+
+static int
+build_id_verify (const char *filename, struct build_id *check)
+{
+ bfd *abfd;
+ struct build_id *found = NULL;
+ int retval = 0;
+
+ /* We expect to be silent on the non-existing files. */
+ abfd = bfd_openr (filename, gnutarget);
+ if (abfd == NULL)
+ return 0;
+
+ found = build_id_bfd_get (abfd);
+
+ if (found == NULL)
+ warning (_("File \"%s\" has no build-id, file skipped"), filename);
+ else if (found->size != check->size
+ || memcmp (found->data, check->data, found->size) != 0)
+ warning (_("File \"%s\" has a different build-id, file skipped"), filename);
+ else
+ retval = 1;
+
+ if (!bfd_close (abfd))
+ warning (_("cannot close \"%s\": %s"), filename,
+ bfd_errmsg (bfd_get_error ()));
+ return retval;
+}
+
+static char *
+build_id_to_debug_filename (struct build_id *build_id)
+{
+ char *link, *s, *retval = NULL;
+ gdb_byte *data = build_id->data;
+ size_t size = build_id->size;
+
+ /* DEBUG_FILE_DIRECTORY/.build-id/ab/cdef */
+ link = xmalloc (strlen (debug_file_directory) + (sizeof "/.build-id/" - 1) + 1
+ + 2 * size + (sizeof ".debug" - 1) + 1);
+ s = link + sprintf (link, "%s/.build-id/", debug_file_directory);
+ if (size > 0)
+ {
+ size--;
+ s += sprintf (s, "%02x", (unsigned) *data++);
+ }
+ if (size > 0)
+ *s++ = '/';
+ while (size-- > 0)
+ s += sprintf (s, "%02x", (unsigned) *data++);
+ strcpy (s, ".debug");
+
+ /* lrealpath() is expensive even for the usually non-existent files. */
+ if (access (link, F_OK) == 0)
+ retval = lrealpath (link);
+ xfree (link);
+
+ if (retval != NULL && !build_id_verify (retval, build_id))
+ {
+ xfree (retval);
+ retval = NULL;
+ }
+
+ return retval;
+}
+
static char *
get_debug_link_info (struct objfile *objfile, unsigned long *crc32_out)
{
@@ -1231,6 +1393,25 @@ find_separate_debug_file (struct objfile *objfile)
bfd_size_type debuglink_size;
unsigned long crc32;
int i;
+ struct build_id *build_id;
+
+ build_id = build_id_bfd_get (objfile->obfd);
+ if (build_id != NULL)
+ {
+ char *build_id_name;
+
+ build_id_name = build_id_to_debug_filename (build_id);
+ free (build_id);
+ /* Prevent looping on a stripped .debug file. */
+ if (build_id_name != NULL && strcmp (build_id_name, objfile->name) == 0)
+ {
+ warning (_("\"%s\": separate debug info file has no debug info"),
+ build_id_name);
+ xfree (build_id_name);
+ }
+ else if (build_id_name != NULL)
+ return build_id_name;
+ }
basename = get_debug_link_info (objfile, &crc32);
@@ -1392,7 +1573,7 @@ symbol_file_command (char *args, int from_tty)
stabs we find, but we can't do that until later when we read in
full symbols. */
-static void
+void
set_initial_language (void)
{
struct partial_symtab *pst;
@@ -1507,29 +1688,23 @@ add_symtab_fns (struct sym_fns *sf)
struct sym_fns in the objfile structure, that contains cached
information about the symbol file. */
-static void
-find_sym_fns (struct objfile *objfile)
+static struct sym_fns *
+find_sym_fns (bfd *abfd)
{
struct sym_fns *sf;
- enum bfd_flavour our_flavour = bfd_get_flavour (objfile->obfd);
- char *our_target = bfd_get_target (objfile->obfd);
+ enum bfd_flavour our_flavour = bfd_get_flavour (abfd);
if (our_flavour == bfd_target_srec_flavour
|| our_flavour == bfd_target_ihex_flavour
|| our_flavour == bfd_target_tekhex_flavour)
- return; /* No symbols. */
+ return NULL; /* No symbols. */
for (sf = symtab_fns; sf != NULL; sf = sf->next)
- {
- if (our_flavour == sf->sym_flavour)
- {
- objfile->sf = sf;
- return;
- }
- }
+ 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 (objfile->obfd));
+ bfd_get_target (abfd));
}
@@ -1882,7 +2057,7 @@ print_transfer_performance (struct ui_file *stream,
const struct timeval *start_time,
const struct timeval *end_time)
{
- unsigned long time_count;
+ ULONGEST time_count;
/* Compute the elapsed time in milliseconds, as a tradeoff between
accuracy and overflow. */
@@ -1892,9 +2067,23 @@ print_transfer_performance (struct ui_file *stream,
ui_out_text (uiout, "Transfer rate: ");
if (time_count > 0)
{
- ui_out_field_fmt (uiout, "transfer-rate", "%lu",
- 1000 * (data_count * 8) / time_count);
- ui_out_text (uiout, " bits/sec");
+ 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
{
@@ -2213,7 +2402,6 @@ reread_symbols (void)
sizeof (objfile->msymbol_hash));
memset (&objfile->msymbol_demangled_hash, 0,
sizeof (objfile->msymbol_demangled_hash));
- objfile->fundamental_types = NULL;
clear_objfile_data (objfile);
if (objfile->sf != NULL)
{
@@ -2360,6 +2548,8 @@ reread_separate_symbols (struct objfile *objfile)
objfile->separate_debug_objfile->separate_debug_objfile_backlink
= objfile;
}
+ if (debug_file)
+ xfree (debug_file);
}
@@ -2494,6 +2684,7 @@ init_filename_language_table (void)
add_filename_language (".f", language_fortran);
add_filename_language (".F", language_fortran);
add_filename_language (".s", language_asm);
+ add_filename_language (".sx", language_asm);
add_filename_language (".S", language_asm);
add_filename_language (".pas", language_pascal);
add_filename_language (".p", language_pascal);
@@ -2643,8 +2834,7 @@ clear_symtab_users (void)
breakpoint_re_set ();
set_default_breakpoint (0, 0, 0, 0);
clear_pc_function_cache ();
- if (deprecated_target_new_objfile_hook)
- deprecated_target_new_objfile_hook (NULL);
+ 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
@@ -2952,75 +3142,6 @@ add_psymbol_to_list (char *name, int namelength, domain_enum domain,
return psym;
}
-/* Add a symbol with a long value to a psymtab. This differs from
- * add_psymbol_to_list above in taking both a mangled and a demangled
- * name. */
-
-void
-add_psymbol_with_dem_name_to_list (char *name, int namelength, char *dem_name,
- int dem_namelength, domain_enum domain,
- enum address_class class,
- struct psymbol_allocation_list *list, long val, /* Value as a long */
- CORE_ADDR coreaddr, /* Value as a CORE_ADDR */
- enum language language,
- struct objfile *objfile)
-{
- struct partial_symbol *psym;
- char *buf = alloca (namelength + 1);
- /* psymbol is static so that there will be no uninitialized gaps in the
- structure which might contain random data, causing cache misses in
- bcache. */
- static struct partial_symbol psymbol;
-
- /* Create local copy of the partial symbol */
-
- memcpy (buf, name, namelength);
- buf[namelength] = '\0';
- DEPRECATED_SYMBOL_NAME (&psymbol) = deprecated_bcache (buf, namelength + 1,
- objfile->psymbol_cache);
-
- buf = alloca (dem_namelength + 1);
- memcpy (buf, dem_name, dem_namelength);
- buf[dem_namelength] = '\0';
-
- switch (language)
- {
- case language_c:
- case language_cplus:
- SYMBOL_CPLUS_DEMANGLED_NAME (&psymbol) =
- deprecated_bcache (buf, dem_namelength + 1, objfile->psymbol_cache);
- break;
- /* FIXME What should be done for the default case? Ignoring for now. */
- }
-
- /* val and coreaddr are mutually exclusive, one of them *will* be zero */
- if (val != 0)
- {
- SYMBOL_VALUE (&psymbol) = val;
- }
- else
- {
- SYMBOL_VALUE_ADDRESS (&psymbol) = coreaddr;
- }
- SYMBOL_SECTION (&psymbol) = 0;
- SYMBOL_LANGUAGE (&psymbol) = language;
- PSYMBOL_DOMAIN (&psymbol) = domain;
- PSYMBOL_CLASS (&psymbol) = class;
- SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol, language);
-
- /* Stash the partial symbol away in the cache */
- psym = deprecated_bcache (&psymbol, sizeof (struct partial_symbol),
- objfile->psymbol_cache);
-
- /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
- if (list->next >= list->list + list->size)
- {
- extend_psymbol_list (list, objfile);
- }
- *list->next++ = psym;
- OBJSTAT (objfile, n_psyms++);
-}
-
/* Initialize storage for partial symbols. */
void
@@ -3114,10 +3235,6 @@ init_psymbol_list (struct objfile *objfile, int total_symbols)
enum overlay_debugging_state overlay_debugging = ovly_off;
int overlay_cache_invalid = 0; /* True if need to refresh mapped state */
-/* Target vector for refreshing overlay mapped state */
-static void simple_overlay_update (struct obj_section *);
-void (*target_overlay_update) (struct obj_section *) = simple_overlay_update;
-
/* 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". */
@@ -3171,9 +3288,9 @@ overlay_is_mapped (struct obj_section *osect)
case ovly_off:
return 0; /* overlay debugging off */
case ovly_auto: /* overlay debugging automatic */
- /* Unles there is a target_overlay_update function,
+ /* Unles there is a gdbarch_overlay_update function,
there's really nothing useful to do here (can't really go auto) */
- if (target_overlay_update)
+ if (gdbarch_overlay_update_p (current_gdbarch))
{
if (overlay_cache_invalid)
{
@@ -3181,7 +3298,7 @@ overlay_is_mapped (struct obj_section *osect)
overlay_cache_invalid = 0;
}
if (osect->ovly_mapped == -1)
- (*target_overlay_update) (osect);
+ gdbarch_overlay_update (current_gdbarch, osect);
}
/* fall thru to manual case */
case ovly_on: /* overlay debugging manual */
@@ -3397,13 +3514,13 @@ list_overlays_command (char *args, int from_tty)
name = bfd_section_name (objfile->obfd, osect->the_bfd_section);
printf_filtered ("Section %s, loaded at ", name);
- deprecated_print_address_numeric (lma, 1, gdb_stdout);
+ fputs_filtered (paddress (lma), gdb_stdout);
puts_filtered (" - ");
- deprecated_print_address_numeric (lma + size, 1, gdb_stdout);
+ fputs_filtered (paddress (lma + size), gdb_stdout);
printf_filtered (", mapped at ");
- deprecated_print_address_numeric (vma, 1, gdb_stdout);
+ fputs_filtered (paddress (vma), gdb_stdout);
puts_filtered (" - ");
- deprecated_print_address_numeric (vma + size, 1, gdb_stdout);
+ fputs_filtered (paddress (vma + size), gdb_stdout);
puts_filtered ("\n");
nmapped++;
@@ -3534,8 +3651,8 @@ overlay_off_command (char *args, int from_tty)
static void
overlay_load_command (char *args, int from_tty)
{
- if (target_overlay_update)
- (*target_overlay_update) (NULL);
+ if (gdbarch_overlay_update_p (current_gdbarch))
+ gdbarch_overlay_update (current_gdbarch, NULL);
else
error (_("This target does not know how to read its overlay state."));
}
@@ -3559,7 +3676,7 @@ overlay_command (char *args, int from_tty)
This is GDB's default target overlay layer. It works with the
minimal overlay manager supplied as an example by Cygnus. The
- entry point is via a function pointer "target_overlay_update",
+ entry point is via a function pointer "gdbarch_overlay_update",
so targets that use a different runtime overlay manager can
substitute their own overlay_update function and take over the
function pointer.
@@ -3606,7 +3723,8 @@ enum ovly_index
{
VMA, SIZE, LMA, MAPPED
};
-#define TARGET_LONG_BYTES (TARGET_LONG_BIT / TARGET_CHAR_BIT)
+#define TARGET_LONG_BYTES (gdbarch_long_bit (current_gdbarch) \
+ / TARGET_CHAR_BIT)
/* Throw away the cached copy of _ovly_table */
static void
@@ -3762,7 +3880,7 @@ simple_overlay_update_1 (struct obj_section *osect)
If a cached entry can't be found or the cache isn't valid, then
re-read the entire cache, and go ahead and update all sections. */
-static void
+void
simple_overlay_update (struct obj_section *osect)
{
struct objfile *objfile;
@@ -3846,6 +3964,133 @@ symfile_relocate_debug_section (bfd *abfd, asection *sectp, bfd_byte *buf)
return bfd_simple_get_relocated_section_contents (abfd, sectp, buf, NULL);
}
+struct symfile_segment_data *
+get_symfile_segment_data (bfd *abfd)
+{
+ struct sym_fns *sf = find_sym_fns (abfd);
+
+ if (sf == NULL)
+ return NULL;
+
+ return sf->sym_segments (abfd);
+}
+
+void
+free_symfile_segment_data (struct symfile_segment_data *data)
+{
+ xfree (data->segment_bases);
+ xfree (data->segment_sizes);
+ xfree (data->segment_info);
+ xfree (data);
+}
+
+
+/* Given:
+ - DATA, containing segment addresses from the object file ABFD, and
+ the mapping from ABFD's sections onto the segments that own them,
+ and
+ - SEGMENT_BASES[0 .. NUM_SEGMENT_BASES - 1], holding the actual
+ segment addresses reported by the target,
+ store the appropriate offsets for each section in OFFSETS.
+
+ If there are fewer entries in SEGMENT_BASES than there are segments
+ in DATA, then apply SEGMENT_BASES' last entry to all the segments.
+
+ If there are more, then verify that all the excess addresses are
+ the same as the last legitimate one, and then ignore them. This
+ allows "TextSeg=X;DataSeg=X" qOffset replies for files which have
+ only a single segment. */
+int
+symfile_map_offsets_to_segments (bfd *abfd, struct symfile_segment_data *data,
+ struct section_offsets *offsets,
+ int num_segment_bases,
+ const CORE_ADDR *segment_bases)
+{
+ int i;
+ asection *sect;
+
+ /* It doesn't make sense to call this function unless you have some
+ segment base addresses. */
+ gdb_assert (segment_bases > 0);
+
+ /* If we do not have segment mappings for the object file, we
+ can not relocate it by segments. */
+ gdb_assert (data != NULL);
+ gdb_assert (data->num_segments > 0);
+
+ /* Check any extra SEGMENT_BASES entries. */
+ if (num_segment_bases > data->num_segments)
+ for (i = data->num_segments; i < num_segment_bases; i++)
+ if (segment_bases[i] != segment_bases[data->num_segments - 1])
+ return 0;
+
+ for (i = 0, sect = abfd->sections; sect != NULL; i++, sect = sect->next)
+ {
+ int which = data->segment_info[i];
+
+ gdb_assert (0 <= which && which <= data->num_segments);
+
+ /* Don't bother computing offsets for sections that aren't
+ loaded as part of any segment. */
+ if (! which)
+ continue;
+
+ /* Use the last SEGMENT_BASES entry as the address of any extra
+ segments mentioned in DATA->segment_info. */
+ if (which > num_segment_bases)
+ which = num_segment_bases;
+
+ offsets->offsets[i] = (segment_bases[which - 1]
+ - data->segment_bases[which - 1]);
+ }
+
+ return 1;
+}
+
+static void
+symfile_find_segment_sections (struct objfile *objfile)
+{
+ bfd *abfd = objfile->obfd;
+ int i;
+ asection *sect;
+ struct symfile_segment_data *data;
+
+ data = get_symfile_segment_data (objfile->obfd);
+ if (data == NULL)
+ return;
+
+ if (data->num_segments != 1 && data->num_segments != 2)
+ {
+ free_symfile_segment_data (data);
+ return;
+ }
+
+ for (i = 0, sect = abfd->sections; sect != NULL; i++, sect = sect->next)
+ {
+ CORE_ADDR vma;
+ int which = data->segment_info[i];
+
+ if (which == 1)
+ {
+ if (objfile->sect_index_text == -1)
+ objfile->sect_index_text = sect->index;
+
+ if (objfile->sect_index_rodata == -1)
+ objfile->sect_index_rodata = sect->index;
+ }
+ else if (which == 2)
+ {
+ if (objfile->sect_index_data == -1)
+ objfile->sect_index_data = sect->index;
+
+ if (objfile->sect_index_bss == -1)
+ objfile->sect_index_bss = sect->index;
+ }
+ }
+
+ free_symfile_segment_data (data);
+}
+
void
_initialize_symfile (void)
{