/* Generic symbol file reading for the GNU debugger, GDB.
- Copyright (C) 1990-2012 Free Software Foundation, Inc.
+ Copyright (C) 1990-2013 Free Software Foundation, Inc.
Contributed by Cygnus Support, using pieces from other GDB modules.
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);
int auto_solib_add = 1;
\f
-/* 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;
require_partial_symbols (objfile, 0);
}
+/* Initialize entry point information for this objfile. */
+
+static 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);
+ }
+}
+
/* Process a symbol file, as either the main file or as a dynamically
loaded file.
+ This function does not set the OBJFILE's entry-point info.
+
OBJFILE is where the symbols are to be read from.
ADDRS is the list of section load addresses. If the user has given
an 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)
+static void
+syms_from_objfile_1 (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;
gdb_assert (! (addrs && offsets));
- init_entry_point_info (objfile);
objfile->sf = find_sym_fns (objfile->obfd);
if (objfile->sf == NULL)
- return; /* No symbols. */
+ {
+ /* No symbols to load, but we still need to make sure
+ that the section_offsets table is allocated. */
+ int num_sections = bfd_count_sections (objfile->obfd);
+ size_t size = SIZEOF_N_SECTION_OFFSETS (num_offsets);
+
+ objfile->num_sections = num_sections;
+ objfile->section_offsets
+ = obstack_alloc (&objfile->objfile_obstack, size);
+ memset (objfile->section_offsets, 0, size);
+ return;
+ }
/* Make sure that partially constructed symbol tables will be cleaned up
if an error occurs during symbol reading. */
xfree (local_addr);
}
+/* Same as syms_from_objfile_1, but also initializes the objfile
+ entry-point info. */
+
+void
+syms_from_objfile (struct objfile *objfile,
+ struct section_addr_info *addrs,
+ struct section_offsets *offsets,
+ int num_offsets,
+ int add_flags)
+{
+ syms_from_objfile_1 (objfile, addrs, offsets, num_offsets, add_flags);
+ init_entry_point_info (objfile);
+}
+
/* Perform required actions after either reading in the initial
symbols for a new objfile, or mapping in the symbols from a reusable
objfile. ADD_FLAGS is a bitmask of enum symfile_add_flags. */
/* Function: list_overlays_command
Print a list of mapped sections and their PC ranges. */
-void
+static void
list_overlays_command (char *args, int from_tty)
{
int nmapped = 0;
/* Function: map_overlay_command
Mark the named section as mapped (ie. residing at its VMA address). */
-void
+static void
map_overlay_command (char *args, int from_tty)
{
struct objfile *objfile, *objfile2;
Mark the overlay section as unmapped
(ie. resident in its LMA address range, rather than the VMA range). */
-void
+static void
unmap_overlay_command (char *args, int from_tty)
{
struct objfile *objfile;
projects / deliverable / binutils-gdb.git / blobdiff