/* Frame unwinder for frames using the libunwind library.
- Copyright 2003, 2004 Free Software Foundation, Inc.
+ Copyright (C) 2003, 2004, 2006, 2007 Free Software Foundation, Inc.
Written by Jeff Johnston, contributed by Red Hat Inc.
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,
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., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
static int (*unw_step_p) (unw_cursor_t *);
static int (*unw_init_remote_p) (unw_cursor_t *, unw_addr_space_t, void *);
static unw_addr_space_t (*unw_create_addr_space_p) (unw_accessors_t *, int);
+static void (*unw_destroy_addr_space_p) (unw_addr_space_t);
static int (*unw_search_unwind_table_p) (unw_addr_space_t, unw_word_t, unw_dyn_info_t *,
unw_proc_info_t *, int, void *);
static unw_word_t (*unw_find_dyn_list_p) (unw_addr_space_t, unw_dyn_info_t *,
CORE_ADDR base;
CORE_ADDR func_addr;
unw_cursor_t cursor;
+ unw_addr_space_t as;
};
/* We need to qualify the function names with a platform-specific prefix to match
#define STRINGIFY(name) STRINGIFY2(name)
#ifndef LIBUNWIND_SO
-#define LIBUNWIND_SO "libunwind-" STRINGIFY(UNW_TARGET) ".so"
+/* Use the stable ABI major version number. `libunwind-ia64.so' is a link time
+ only library, not a runtime one. */
+#define LIBUNWIND_SO "libunwind-" STRINGIFY(UNW_TARGET) ".so.7"
#endif
static char *get_reg_name = STRINGIFY(UNW_OBJ(get_reg));
static char *step_name = STRINGIFY(UNW_OBJ(step));
static char *init_remote_name = STRINGIFY(UNW_OBJ(init_remote));
static char *create_addr_space_name = STRINGIFY(UNW_OBJ(create_addr_space));
+static char *destroy_addr_space_name = STRINGIFY(UNW_OBJ(destroy_addr_space));
static char *search_unwind_table_name = STRINGIFY(UNW_OBJ(search_unwind_table));
static char *find_dyn_list_name = STRINGIFY(UNW_OBJ(find_dyn_list));
unw_regnum_t uw_sp_regnum;
struct libunwind_frame_cache *cache;
struct libunwind_descr *descr;
+ struct gdbarch *gdbarch = get_frame_arch (next_frame);
int i, ret;
if (*this_cache)
/* Allocate a new cache. */
cache = FRAME_OBSTACK_ZALLOC (struct libunwind_frame_cache);
- cache->func_addr = frame_func_unwind (next_frame);
+ /* We can assume we are unwinding a normal frame. Even if this is
+ for a signal trampoline, ia64 signal "trampolines" use a normal
+ subroutine call to start the signal handler. */
+ cache->func_addr = frame_func_unwind (next_frame, NORMAL_FRAME);
if (cache->func_addr == 0
&& frame_relative_level (next_frame) > 0
&& get_frame_type (next_frame) != SIGTRAMP_FRAME)
the current frame rather than the top. We then use the unw_step function to
move the libunwind cursor back one frame. We can later use this cursor to find previous
registers via the unw_get_reg interface which will invoke libunwind's special logic. */
- descr = libunwind_descr (get_frame_arch (next_frame));
+ descr = libunwind_descr (gdbarch);
acc = descr->accessors;
as = unw_create_addr_space_p (acc,
- TARGET_BYTE_ORDER == BFD_ENDIAN_BIG
+ gdbarch_byte_order (gdbarch)
+ == BFD_ENDIAN_BIG
? __BIG_ENDIAN
: __LITTLE_ENDIAN);
unw_init_remote_p (&cache->cursor, as, next_frame);
if (unw_step_p (&cache->cursor) < 0)
- return NULL;
+ {
+ unw_destroy_addr_space_p (as);
+ return NULL;
+ }
/* To get base address, get sp from previous frame. */
- uw_sp_regnum = descr->gdb2uw (SP_REGNUM);
+ uw_sp_regnum = descr->gdb2uw (gdbarch_sp_regnum (gdbarch));
ret = unw_get_reg_p (&cache->cursor, uw_sp_regnum, &fp);
if (ret < 0)
- error (_("Can't get libunwind sp register."));
+ {
+ unw_destroy_addr_space_p (as);
+ error (_("Can't get libunwind sp register."));
+ }
cache->base = (CORE_ADDR)fp;
+ cache->as = as;
*this_cache = cache;
return cache;
}
+void
+libunwind_frame_dealloc_cache (struct frame_info *self, void *this_cache)
+{
+ struct libunwind_frame_cache *cache = this_cache;
+ if (cache->as)
+ unw_destroy_addr_space_p (cache->as);
+}
+
unw_word_t
libunwind_find_dyn_list (unw_addr_space_t as, unw_dyn_info_t *di, void *arg)
{
{
NORMAL_FRAME,
libunwind_frame_this_id,
- libunwind_frame_prev_register
+ libunwind_frame_prev_register,
+ NULL,
+ NULL,
+ NULL,
+ libunwind_frame_dealloc_cache
};
/* Verify if there is sufficient libunwind information for the frame to use
unw_accessors_t *acc;
unw_addr_space_t as;
struct libunwind_descr *descr;
+ struct gdbarch *gdbarch = get_frame_arch (next_frame);
int i, ret;
/* To test for libunwind unwind support, initialize a cursor to the current frame and try to back
If libunwind returns success for this operation, it means that it has found sufficient
libunwind unwinding information to do so. */
- descr = libunwind_descr (get_frame_arch (next_frame));
+ descr = libunwind_descr (gdbarch);
acc = descr->accessors;
as = unw_create_addr_space_p (acc,
- TARGET_BYTE_ORDER == BFD_ENDIAN_BIG
+ gdbarch_byte_order (gdbarch)
+ == BFD_ENDIAN_BIG
? __BIG_ENDIAN
: __LITTLE_ENDIAN);
ret = unw_init_remote_p (&cursor, as, next_frame);
if (ret < 0)
- return NULL;
+ {
+ unw_destroy_addr_space_p (as);
+ return NULL;
+ }
/* Check to see if we have libunwind info by checking if we are in a
signal frame. If it doesn't return an error, we have libunwind info
and can use libunwind. */
ret = unw_is_signal_frame_p (&cursor);
+ unw_destroy_addr_space_p (as);
if (ret < 0)
return NULL;
libunwind_frame_prev_register (struct frame_info *next_frame, void **this_cache,
int regnum, int *optimizedp,
enum lval_type *lvalp, CORE_ADDR *addrp,
- int *realnump, void *valuep)
+ int *realnump, gdb_byte *valuep)
{
struct libunwind_frame_cache *cache =
libunwind_frame_cache (next_frame, this_cache);
+ struct gdbarch *gdbarch = get_frame_arch (next_frame);
void *ptr;
unw_cursor_t *c;
*realnump = -1;
if (valuep)
- memset (valuep, 0, register_size (current_gdbarch, regnum));
+ memset (valuep, 0, register_size (gdbarch, regnum));
if (uw_regnum < 0)
return;
return;
if (valuep)
- memcpy (valuep, ptr, register_size (current_gdbarch, regnum));
+ memcpy (valuep, ptr, register_size (gdbarch, regnum));
if (unw_get_saveloc_p (&cache->cursor, uw_regnum, &sl) < 0)
return;
unw_accessors_t *acc;
unw_addr_space_t as;
struct libunwind_descr *descr;
+ struct gdbarch *gdbarch = get_frame_arch (next_frame);
int i, ret;
/* To test for libunwind unwind support, initialize a cursor to the
has found sufficient libunwind unwinding information to do
so. */
- descr = libunwind_descr (get_frame_arch (next_frame));
+ descr = libunwind_descr (gdbarch);
acc = descr->accessors;
as = unw_create_addr_space_p (acc,
- TARGET_BYTE_ORDER == BFD_ENDIAN_BIG
+ gdbarch_byte_order (gdbarch)
+ == BFD_ENDIAN_BIG
? __BIG_ENDIAN
: __LITTLE_ENDIAN);
ret = unw_init_remote_p (&cursor, as, next_frame);
if (ret < 0)
- return NULL;
+ {
+ unw_destroy_addr_space_p (as);
+ return NULL;
+ }
/* Check to see if we are in a signal frame. */
ret = unw_is_signal_frame_p (&cursor);
+ unw_destroy_addr_space_p (as);
if (ret > 0)
return &libunwind_frame_unwind;
are usually located at BOF, this is not always true and only the libunwind
info can decipher where they actually are. */
int
-libunwind_get_reg_special (struct gdbarch *gdbarch, int regnum, void *buf)
+libunwind_get_reg_special (struct gdbarch *gdbarch, struct regcache *regcache,
+ int regnum, void *buf)
{
unw_cursor_t cursor;
unw_accessors_t *acc;
descr = libunwind_descr (gdbarch);
acc = descr->special_accessors;
as = unw_create_addr_space_p (acc,
- TARGET_BYTE_ORDER == BFD_ENDIAN_BIG
+ gdbarch_byte_order (gdbarch)
+ == BFD_ENDIAN_BIG
? __BIG_ENDIAN
: __LITTLE_ENDIAN);
- ret = unw_init_remote_p (&cursor, as, NULL);
+ ret = unw_init_remote_p (&cursor, as, regcache);
if (ret < 0)
- return -1;
+ {
+ unw_destroy_addr_space_p (as);
+ return -1;
+ }
uw_regnum = descr->gdb2uw (regnum);
ptr = &intval;
}
+ unw_destroy_addr_space_p (as);
+
if (ret < 0)
return -1;
if (buf)
- memcpy (buf, ptr, register_size (current_gdbarch, regnum));
+ memcpy (buf, ptr, register_size (gdbarch, regnum));
return 0;
}
if (unw_create_addr_space_p == NULL)
return 0;
+ unw_destroy_addr_space_p = dlsym (handle, destroy_addr_space_name);
+ if (unw_destroy_addr_space_p == NULL)
+ return 0;
+
unw_search_unwind_table_p = dlsym (handle, search_unwind_table_name);
if (unw_search_unwind_table_p == NULL)
return 0;
projects / deliverable / binutils-gdb.git / blobdiff