/* GDB routines for manipulating objfiles.
- Copyright (C) 1992-2004, 2007-2012 Free Software Foundation, Inc.
+ Copyright (C) 1992-2013 Free Software Foundation, Inc.
Contributed by Cygnus Support, using pieces from other GDB modules.
#include "gdb-stabs.h"
#include "target.h"
#include "bcache.h"
-#include "mdebugread.h"
#include "expression.h"
#include "parser-defs.h"
#include "psymtab.h"
#include "solist.h"
#include "gdb_bfd.h"
+#include "btrace.h"
/* Keep a registry of per-objfile data-pointers required by other GDB
modules. */
struct objfile_pspace_info
{
- int objfiles_changed_p;
struct obj_section **sections;
int num_sections;
+
+ /* Nonzero if object files have been added since the section map
+ was last updated. */
+ int new_objfiles_available;
+
+ /* Nonzero if the section map MUST be updated before use. */
+ int section_map_dirty;
+
+ /* Nonzero if section map updates should be inhibited if possible. */
+ int inhibit_updates;
};
/* Per-program-space data key. */
of the table (objfile->sections) and to the first location after
the end of the table (objfile->sections_end). */
+static void
+add_to_objfile_sections_full (struct bfd *abfd, struct bfd_section *asect,
+ struct objfile *objfile, int force)
+{
+ struct obj_section *section;
+
+ if (!force)
+ {
+ flagword aflag;
+
+ aflag = bfd_get_section_flags (abfd, asect);
+ if (!(aflag & SEC_ALLOC))
+ return;
+ }
+
+ section = &objfile->sections[gdb_bfd_section_index (abfd, asect)];
+ section->objfile = objfile;
+ section->the_bfd_section = asect;
+ section->ovly_mapped = 0;
+}
+
static void
add_to_objfile_sections (struct bfd *abfd, struct bfd_section *asect,
void *objfilep)
{
- struct objfile *objfile = (struct objfile *) objfilep;
- struct obj_section section;
- flagword aflag;
-
- aflag = bfd_get_section_flags (abfd, asect);
- if (!(aflag & SEC_ALLOC))
- return;
- if (bfd_section_size (abfd, asect) == 0)
- return;
-
- section.objfile = objfile;
- section.the_bfd_section = asect;
- section.ovly_mapped = 0;
- obstack_grow (&objfile->objfile_obstack,
- (char *) §ion, sizeof (section));
- objfile->sections_end
- = (struct obj_section *) (((size_t) objfile->sections_end) + 1);
+ add_to_objfile_sections_full (abfd, asect, objfilep, 0);
}
/* Builds a section table for OBJFILE.
- Note that while we are building the table, which goes into the
- objfile obstack, we hijack the sections_end pointer to instead hold
- a count of the number of sections. When bfd_map_over_sections
- returns, this count is used to compute the pointer to the end of
- the sections table, which then overwrites the count.
-
- Also note that the OFFSET and OVLY_MAPPED in each table entry
- are initialized to zero.
-
- Also note that if anything else writes to the objfile obstack while
- we are building the table, we're pretty much hosed. */
+ Note that the OFFSET and OVLY_MAPPED in each table entry are
+ initialized to zero. */
void
build_objfile_section_table (struct objfile *objfile)
{
- objfile->sections_end = 0;
+ int count = gdb_bfd_count_sections (objfile->obfd);
+
+ objfile->sections = OBSTACK_CALLOC (&objfile->objfile_obstack,
+ count,
+ struct obj_section);
+ objfile->sections_end = (objfile->sections + count);
bfd_map_over_sections (objfile->obfd,
add_to_objfile_sections, (void *) objfile);
- objfile->sections = obstack_finish (&objfile->objfile_obstack);
- objfile->sections_end = objfile->sections + (size_t) objfile->sections_end;
+
+ /* See gdb_bfd_section_index. */
+ add_to_objfile_sections_full (objfile->obfd, bfd_com_section_ptr, objfile, 1);
+ add_to_objfile_sections_full (objfile->obfd, bfd_und_section_ptr, objfile, 1);
+ add_to_objfile_sections_full (objfile->obfd, bfd_abs_section_ptr, objfile, 1);
+ add_to_objfile_sections_full (objfile->obfd, bfd_ind_section_ptr, objfile, 1);
}
/* Given a pointer to an initialized bfd (ABFD) and some flag bits
objfile->flags |= flags;
/* Rebuild section map next time we need it. */
- get_objfile_pspace_data (objfile->pspace)->objfiles_changed_p = 1;
+ get_objfile_pspace_data (objfile->pspace)->new_objfiles_available = 1;
return objfile;
}
return objfile->gdbarch;
}
-/* Initialize entry point information for this objfile. */
-
-void
-init_entry_point_info (struct objfile *objfile)
-{
- /* Save startup file's range of PC addresses to help blockframe.c
- decide where the bottom of the stack is. */
-
- if (bfd_get_file_flags (objfile->obfd) & EXEC_P)
- {
- /* Executable file -- record its entry point so we'll recognize
- the startup file because it contains the entry point. */
- objfile->ei.entry_point = bfd_get_start_address (objfile->obfd);
- objfile->ei.entry_point_p = 1;
- }
- else if (bfd_get_file_flags (objfile->obfd) & DYNAMIC
- && bfd_get_start_address (objfile->obfd) != 0)
- {
- /* Some shared libraries may have entry points set and be
- runnable. There's no clear way to indicate this, so just check
- for values other than zero. */
- objfile->ei.entry_point = bfd_get_start_address (objfile->obfd);
- objfile->ei.entry_point_p = 1;
- }
- else
- {
- /* Examination of non-executable.o files. Short-circuit this stuff. */
- objfile->ei.entry_point_p = 0;
- }
-
- if (objfile->ei.entry_point_p)
- {
- CORE_ADDR entry_point = objfile->ei.entry_point;
-
- /* Make certain that the address points at real code, and not a
- function descriptor. */
- entry_point
- = gdbarch_convert_from_func_ptr_addr (objfile->gdbarch,
- entry_point,
- ¤t_target);
-
- /* Remove any ISA markers, so that this matches entries in the
- symbol table. */
- objfile->ei.entry_point
- = gdbarch_addr_bits_remove (objfile->gdbarch, entry_point);
- }
-}
-
/* If there is a valid and known entry point, function fills *ENTRY_P with it
and returns non-zero; otherwise it returns zero. */
/* Must not be already in a list. */
gdb_assert (objfile->separate_debug_objfile_backlink == NULL);
gdb_assert (objfile->separate_debug_objfile_link == NULL);
+ gdb_assert (objfile->separate_debug_objfile == NULL);
+ gdb_assert (parent->separate_debug_objfile_backlink == NULL);
+ gdb_assert (parent->separate_debug_objfile_link == NULL);
objfile->separate_debug_objfile_backlink = parent;
objfile->separate_debug_objfile_link = parent->separate_debug_objfile;
the symbol file data. */
forget_cached_source_info_for_objfile (objfile);
+ breakpoint_free_objfile (objfile);
+ btrace_free_objfile (objfile);
+
/* First do any symbol file specific actions required when we are
finished with a particular symbol file. Note that if the objfile
is using reusable symbol information (via mmalloc) then each of
obstack_free (&objfile->objfile_obstack, 0);
/* Rebuild section map next time we need it. */
- get_objfile_pspace_data (objfile->pspace)->objfiles_changed_p = 1;
+ get_objfile_pspace_data (objfile->pspace)->section_map_dirty = 1;
xfree (objfile);
}
static int
objfile_relocate1 (struct objfile *objfile,
- struct section_offsets *new_offsets)
+ const struct section_offsets *new_offsets)
{
struct obj_section *s;
struct section_offsets *delta =
struct obj_section *s;
s = find_pc_section (objfile->ei.entry_point);
if (s)
- objfile->ei.entry_point += ANOFFSET (delta, s->the_bfd_section->index);
+ {
+ int idx = gdb_bfd_section_index (objfile->obfd, s->the_bfd_section);
+
+ objfile->ei.entry_point += ANOFFSET (delta, idx);
+ }
else
objfile->ei.entry_point += ANOFFSET (delta, SECT_OFF_TEXT (objfile));
}
}
/* Rebuild section map next time we need it. */
- get_objfile_pspace_data (objfile->pspace)->objfiles_changed_p = 1;
+ get_objfile_pspace_data (objfile->pspace)->section_map_dirty = 1;
/* Update the table in exec_ops, used to read memory. */
ALL_OBJFILE_OSECTIONS (objfile, s)
{
- int idx = s->the_bfd_section->index;
+ int idx = s - objfile->sections;
exec_set_section_address (bfd_get_filename (objfile->obfd), idx,
obj_section_addr (s));
files. */
void
-objfile_relocate (struct objfile *objfile, struct section_offsets *new_offsets)
+objfile_relocate (struct objfile *objfile,
+ const struct section_offsets *new_offsets)
{
struct objfile *debug_objfile;
int changed = 0;
addr_info_make_relative (objfile_addrs, debug_objfile->obfd);
gdb_assert (debug_objfile->num_sections
- == bfd_count_sections (debug_objfile->obfd));
+ == gdb_bfd_count_sections (debug_objfile->obfd));
new_debug_offsets =
xmalloc (SIZEOF_N_SECTION_OFFSETS (debug_objfile->num_sections));
make_cleanup (xfree, new_debug_offsets);
if (changed)
breakpoint_re_set ();
}
+
+/* Rebase (add to the offsets) OBJFILE by SLIDE. SEPARATE_DEBUG_OBJFILE is
+ not touched here.
+ Return non-zero iff any change happened. */
+
+static int
+objfile_rebase1 (struct objfile *objfile, CORE_ADDR slide)
+{
+ struct section_offsets *new_offsets =
+ ((struct section_offsets *)
+ alloca (SIZEOF_N_SECTION_OFFSETS (objfile->num_sections)));
+ int i;
+
+ for (i = 0; i < objfile->num_sections; ++i)
+ new_offsets->offsets[i] = slide;
+
+ return objfile_relocate1 (objfile, new_offsets);
+}
+
+/* Rebase (add to the offsets) OBJFILE by SLIDE. Process also OBJFILE's
+ SEPARATE_DEBUG_OBJFILEs. */
+
+void
+objfile_rebase (struct objfile *objfile, CORE_ADDR slide)
+{
+ struct objfile *debug_objfile;
+ int changed = 0;
+
+ changed |= objfile_rebase1 (objfile, slide);
+
+ for (debug_objfile = objfile->separate_debug_objfile;
+ debug_objfile;
+ debug_objfile = objfile_separate_debug_iterate (objfile, debug_objfile))
+ changed |= objfile_rebase1 (debug_objfile, slide);
+
+ /* Relocate breakpoints as necessary, after things are relocated. */
+ if (changed)
+ breakpoint_re_set ();
+}
\f
/* Return non-zero if OBJFILE has partial symbols. */
struct objfile *const objf1 = sect1->objfile;
struct objfile *const objf2 = sect2->objfile;
- const struct bfd *const abfd1 = objf1->obfd;
- const struct bfd *const abfd2 = objf2->obfd;
-
const struct bfd_section *const bfds1 = sect1->the_bfd_section;
const struct bfd_section *const bfds2 = sect2->the_bfd_section;
update_section_map (struct program_space *pspace,
struct obj_section ***pmap, int *pmap_size)
{
+ struct objfile_pspace_info *pspace_info;
int alloc_size, map_size, i;
struct obj_section *s, **map;
struct objfile *objfile;
- gdb_assert (get_objfile_pspace_data (pspace)->objfiles_changed_p != 0);
+ pspace_info = get_objfile_pspace_data (pspace);
+ gdb_assert (pspace_info->section_map_dirty != 0
+ || pspace_info->new_objfiles_available != 0);
map = *pmap;
xfree (map);
return s;
pspace_info = get_objfile_pspace_data (current_program_space);
- if (pspace_info->objfiles_changed_p != 0)
+ if (pspace_info->section_map_dirty
+ || (pspace_info->new_objfiles_available
+ && !pspace_info->inhibit_updates))
{
update_section_map (current_program_space,
&pspace_info->sections,
/* Don't need updates to section map until objfiles are added,
removed or relocated. */
- pspace_info->objfiles_changed_p = 0;
+ pspace_info->new_objfiles_available = 0;
+ pspace_info->section_map_dirty = 0;
}
/* The C standard (ISO/IEC 9899:TC2) requires the BASE argument to
}
-/* In SVR4, we recognize a trampoline by it's section name.
- That is, if the pc is in a section named ".plt" then we are in
- a trampoline. */
+/* Return non-zero if PC is in a section called NAME. */
int
-in_plt_section (CORE_ADDR pc, char *name)
+pc_in_section (CORE_ADDR pc, char *name)
{
struct obj_section *s;
int retval = 0;
retval = (s != NULL
&& s->the_bfd_section->name != NULL
- && strcmp (s->the_bfd_section->name, ".plt") == 0);
+ && strcmp (s->the_bfd_section->name, name) == 0);
return (retval);
}
\f
-/* Set objfiles_changed_p so section map will be rebuilt next time it
+/* Set section_map_dirty so section map will be rebuilt next time it
is used. Called by reread_symbols. */
void
objfiles_changed (void)
{
/* Rebuild section map next time we need it. */
- get_objfile_pspace_data (current_program_space)->objfiles_changed_p = 1;
+ get_objfile_pspace_data (current_program_space)->section_map_dirty = 1;
+}
+
+/* See comments in objfiles.h. */
+
+void
+inhibit_section_map_updates (struct program_space *pspace)
+{
+ get_objfile_pspace_data (pspace)->inhibit_updates = 1;
+}
+
+/* See comments in objfiles.h. */
+
+void
+resume_section_map_updates (struct program_space *pspace)
+{
+ get_objfile_pspace_data (pspace)->inhibit_updates = 0;
+}
+
+/* See comments in objfiles.h. */
+
+void
+resume_section_map_updates_cleanup (void *arg)
+{
+ resume_section_map_updates (arg);
}
/* The default implementation for the "iterate_over_objfiles_in_search_order"
projects / deliverable / binutils-gdb.git / blobdiff