2003-11-14 21:17:51 +00:00
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/* Frame unwinder for frames using the libunwind library.
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2006-03-08 15:28:17 +00:00
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Copyright (C) 2003, 2004, 2006 Free Software Foundation, Inc.
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2003-11-14 21:17:51 +00:00
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Written by Jeff Johnston, contributed by Red Hat Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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2005-12-17 22:34:03 +00:00
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Foundation, Inc., 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301, USA. */
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2003-11-14 21:17:51 +00:00
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#include "defs.h"
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#include "inferior.h"
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#include "frame.h"
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#include "frame-base.h"
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#include "frame-unwind.h"
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#include "gdbcore.h"
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#include "gdbtypes.h"
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#include "symtab.h"
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#include "objfiles.h"
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#include "regcache.h"
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#include <dlfcn.h>
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#include "gdb_assert.h"
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#include "gdb_string.h"
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#include "libunwind-frame.h"
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#include "complaints.h"
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static int libunwind_initialized;
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static struct gdbarch_data *libunwind_descr_handle;
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/* Required function pointers from libunwind. */
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static int (*unw_get_reg_p) (unw_cursor_t *, unw_regnum_t, unw_word_t *);
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static int (*unw_get_fpreg_p) (unw_cursor_t *, unw_regnum_t, unw_fpreg_t *);
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static int (*unw_get_saveloc_p) (unw_cursor_t *, unw_regnum_t, unw_save_loc_t *);
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2005-06-08 21:54:23 +00:00
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static int (*unw_is_signal_frame_p) (unw_cursor_t *);
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2003-11-14 21:17:51 +00:00
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static int (*unw_step_p) (unw_cursor_t *);
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static int (*unw_init_remote_p) (unw_cursor_t *, unw_addr_space_t, void *);
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static unw_addr_space_t (*unw_create_addr_space_p) (unw_accessors_t *, int);
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static int (*unw_search_unwind_table_p) (unw_addr_space_t, unw_word_t, unw_dyn_info_t *,
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unw_proc_info_t *, int, void *);
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2003-12-13 03:51:56 +00:00
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static unw_word_t (*unw_find_dyn_list_p) (unw_addr_space_t, unw_dyn_info_t *,
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void *);
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2003-11-14 21:17:51 +00:00
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struct libunwind_frame_cache
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{
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CORE_ADDR base;
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CORE_ADDR func_addr;
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unw_cursor_t cursor;
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};
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/* We need to qualify the function names with a platform-specific prefix to match
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the names used by the libunwind library. The UNW_OBJ macro is provided by the
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libunwind.h header file. */
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#define STRINGIFY2(name) #name
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#define STRINGIFY(name) STRINGIFY2(name)
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2004-08-05 20:37:56 +00:00
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#ifndef LIBUNWIND_SO
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#define LIBUNWIND_SO "libunwind-" STRINGIFY(UNW_TARGET) ".so"
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#endif
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2003-11-14 21:17:51 +00:00
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static char *get_reg_name = STRINGIFY(UNW_OBJ(get_reg));
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static char *get_fpreg_name = STRINGIFY(UNW_OBJ(get_fpreg));
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static char *get_saveloc_name = STRINGIFY(UNW_OBJ(get_save_loc));
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2005-06-08 21:54:23 +00:00
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static char *is_signal_frame_name = STRINGIFY(UNW_OBJ(is_signal_frame));
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2003-11-14 21:17:51 +00:00
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static char *step_name = STRINGIFY(UNW_OBJ(step));
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static char *init_remote_name = STRINGIFY(UNW_OBJ(init_remote));
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static char *create_addr_space_name = STRINGIFY(UNW_OBJ(create_addr_space));
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static char *search_unwind_table_name = STRINGIFY(UNW_OBJ(search_unwind_table));
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static char *find_dyn_list_name = STRINGIFY(UNW_OBJ(find_dyn_list));
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static struct libunwind_descr *
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libunwind_descr (struct gdbarch *gdbarch)
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{
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return gdbarch_data (gdbarch, libunwind_descr_handle);
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}
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static void *
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libunwind_descr_init (struct gdbarch *gdbarch)
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{
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struct libunwind_descr *descr = GDBARCH_OBSTACK_ZALLOC (gdbarch,
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struct libunwind_descr);
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return descr;
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}
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void
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libunwind_frame_set_descr (struct gdbarch *gdbarch, struct libunwind_descr *descr)
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{
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struct libunwind_descr *arch_descr;
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gdb_assert (gdbarch != NULL);
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arch_descr = gdbarch_data (gdbarch, libunwind_descr_handle);
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if (arch_descr == NULL)
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{
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/* First time here. Must initialize data area. */
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arch_descr = libunwind_descr_init (gdbarch);
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2004-03-15 20:38:08 +00:00
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deprecated_set_gdbarch_data (gdbarch, libunwind_descr_handle, arch_descr);
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2003-11-14 21:17:51 +00:00
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}
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/* Copy new descriptor info into arch descriptor. */
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arch_descr->gdb2uw = descr->gdb2uw;
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arch_descr->uw2gdb = descr->uw2gdb;
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arch_descr->is_fpreg = descr->is_fpreg;
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arch_descr->accessors = descr->accessors;
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2005-06-08 21:54:23 +00:00
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arch_descr->special_accessors = descr->special_accessors;
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2003-11-14 21:17:51 +00:00
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}
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static struct libunwind_frame_cache *
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libunwind_frame_cache (struct frame_info *next_frame, void **this_cache)
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{
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unw_accessors_t *acc;
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unw_addr_space_t as;
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unw_word_t fp;
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unw_regnum_t uw_sp_regnum;
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struct libunwind_frame_cache *cache;
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struct libunwind_descr *descr;
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int i, ret;
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if (*this_cache)
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return *this_cache;
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/* Allocate a new cache. */
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cache = FRAME_OBSTACK_ZALLOC (struct libunwind_frame_cache);
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cache->func_addr = frame_func_unwind (next_frame);
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2005-06-08 21:54:23 +00:00
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if (cache->func_addr == 0
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&& frame_relative_level (next_frame) > 0
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&& get_frame_type (next_frame) != SIGTRAMP_FRAME)
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return NULL;
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2003-11-14 21:17:51 +00:00
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/* Get a libunwind cursor to the previous frame. We do this by initializing
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a cursor. Libunwind treats a new cursor as the top of stack and will get
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the current register set via the libunwind register accessor. Now, we
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provide the platform-specific accessors and we set up the register accessor to use
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the frame register unwinding interfaces so that we properly get the registers for
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the current frame rather than the top. We then use the unw_step function to
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move the libunwind cursor back one frame. We can later use this cursor to find previous
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registers via the unw_get_reg interface which will invoke libunwind's special logic. */
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descr = libunwind_descr (get_frame_arch (next_frame));
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acc = descr->accessors;
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as = unw_create_addr_space_p (acc,
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TARGET_BYTE_ORDER == BFD_ENDIAN_BIG
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? __BIG_ENDIAN
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: __LITTLE_ENDIAN);
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unw_init_remote_p (&cache->cursor, as, next_frame);
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2005-06-08 21:54:23 +00:00
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if (unw_step_p (&cache->cursor) < 0)
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return NULL;
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2003-11-14 21:17:51 +00:00
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/* To get base address, get sp from previous frame. */
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uw_sp_regnum = descr->gdb2uw (SP_REGNUM);
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ret = unw_get_reg_p (&cache->cursor, uw_sp_regnum, &fp);
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if (ret < 0)
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2005-02-10 Andrew Cagney <cagney@gnu.org>
Mark up all error and warning messages.
* ada-lang.c, amd64-tdep.c, arch-utils.c, breakpoint.c: Update.
* bsd-kvm.c, bsd-uthread.c, coff-solib.h, coffread.c: Update.
* core-aout.c, core-regset.c, corefile.c, corelow.c: Update.
* cp-abi.c, cp-support.c, cp-valprint.c, cris-tdep.c: Update.
* dbxread.c, demangle.c, doublest.c, dsrec.c: Update.
* dve3900-rom.c, dwarf2expr.c, dwarf2loc.c: Update.
* dwarf2read.c, dwarfread.c, elfread.c, eval.c: Update.
* event-top.c, exec.c, expprint.c, f-lang.c: Update.
* f-typeprint.c, f-valprint.c, fbsd-nat.c, findvar.c: Update.
* frame.c, frv-linux-tdep.c, gcore.c, gdbtypes.c: Update.
* gnu-nat.c, gnu-v2-abi.c, gnu-v3-abi.c, go32-nat.c: Update.
* hpacc-abi.c, hppa-hpux-nat.c, hppa-hpux-tdep.c: Update.
* hppa-linux-nat.c, hppa-linux-tdep.c, hppa-tdep.c: Update.
* hpread.c, hpux-thread.c, i386-linux-nat.c: Update.
* i386-linux-tdep.c, i386-tdep.c, i386bsd-nat.c: Update.
* i386gnu-nat.c, i387-tdep.c, ia64-linux-nat.c: Update.
* ia64-tdep.c, inf-child.c, inf-ptrace.c, inf-ttrace.c: Update.
* infcall.c, infcmd.c, inflow.c, infptrace.c, infrun.c: Update.
* inftarg.c, interps.c, irix5-nat.c, jv-lang.c: Update.
* kod-cisco.c, kod.c, language.c, libunwind-frame.c: Update.
* linespec.c, linux-nat.c, linux-thread-db.c, m2-lang.c: Update.
* m32r-rom.c, m68hc11-tdep.c, m68k-tdep.c: Update.
* m68klinux-nat.c, macrocmd.c, macroexp.c, main.c: Update.
* maint.c, mdebugread.c, mem-break.c, memattr.c: Update.
* mips-linux-tdep.c, mips-tdep.c, mipsread.c, monitor.c: Update.
* nlmread.c, nto-procfs.c, objc-lang.c, objfiles.c: Update.
* observer.c, ocd.c, p-lang.c, p-typeprint.c: Update.
* p-valprint.c, pa64solib.c, parse.c, ppc-linux-tdep.c: Update.
* ppcnbsd-tdep.c, printcmd.c, procfs.c, remote-e7000.c: Update.
* remote-fileio.c, remote-m32r-sdi.c, remote-rdi.c: Update.
* remote-rdp.c, remote-sim.c, remote-st.c: Update.
* remote-utils.c, remote-utils.h, remote.c: Update.
* rom68k-rom.c, rs6000-nat.c, s390-tdep.c, scm-lang.c: Update.
* ser-e7kpc.c, ser-tcp.c, ser-unix.c, sh-tdep.c: Update.
* sh3-rom.c, shnbsd-tdep.c, sol-thread.c, solib-aix5.c: Update.
* solib-frv.c, solib-irix.c, solib-osf.c, solib-pa64.c: Update.
* solib-som.c, solib-sunos.c, solib-svr4.c, solib.c: Update.
* somread.c, somsolib.c, source.c, stabsread.c: Update.
* stack.c, std-regs.c, symfile-mem.c, symfile.c: Update.
* symmisc.c, symtab.c, target.c, thread.c, top.c: Update.
* tracepoint.c, trad-frame.c, typeprint.c, utils.c: Update.
* uw-thread.c, valarith.c, valops.c, valprint.c: Update.
* value.c, varobj.c, version.in, win32-nat.c, wince.c: Update.
* xcoffread.c, xcoffsolib.c, cli/cli-cmds.c: Update.
* cli/cli-decode.c, cli/cli-dump.c, cli/cli-logging.c: Update.
* cli/cli-script.c, cli/cli-setshow.c, mi/mi-cmd-break.c: Update.
* mi/mi-cmd-disas.c, mi/mi-cmd-env.c, mi/mi-cmd-file.c: Update.
* mi/mi-cmd-stack.c, mi/mi-cmd-var.c, mi/mi-getopt.c: Update.
* mi/mi-symbol-cmds.c, tui/tui-layout.c, tui/tui-stack.c: Update.
* tui/tui-win.c: Update.
2005-02-11 04:06:14 +00:00
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error (_("Can't get libunwind sp register."));
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2003-11-14 21:17:51 +00:00
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cache->base = (CORE_ADDR)fp;
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*this_cache = cache;
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return cache;
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}
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2003-12-13 03:51:56 +00:00
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unw_word_t
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libunwind_find_dyn_list (unw_addr_space_t as, unw_dyn_info_t *di, void *arg)
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2003-11-14 21:17:51 +00:00
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{
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2003-12-13 03:51:56 +00:00
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return unw_find_dyn_list_p (as, di, arg);
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2003-11-14 21:17:51 +00:00
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}
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static const struct frame_unwind libunwind_frame_unwind =
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{
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NORMAL_FRAME,
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libunwind_frame_this_id,
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libunwind_frame_prev_register
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};
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/* Verify if there is sufficient libunwind information for the frame to use
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libunwind frame unwinding. */
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const struct frame_unwind *
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libunwind_frame_sniffer (struct frame_info *next_frame)
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{
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unw_cursor_t cursor;
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unw_accessors_t *acc;
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unw_addr_space_t as;
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struct libunwind_descr *descr;
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int i, ret;
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/* To test for libunwind unwind support, initialize a cursor to the current frame and try to back
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up. We use this same method when setting up the frame cache (see libunwind_frame_cache()).
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If libunwind returns success for this operation, it means that it has found sufficient
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libunwind unwinding information to do so. */
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descr = libunwind_descr (get_frame_arch (next_frame));
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acc = descr->accessors;
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as = unw_create_addr_space_p (acc,
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TARGET_BYTE_ORDER == BFD_ENDIAN_BIG
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? __BIG_ENDIAN
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: __LITTLE_ENDIAN);
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ret = unw_init_remote_p (&cursor, as, next_frame);
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2005-06-08 21:54:23 +00:00
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if (ret < 0)
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return NULL;
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/* Check to see if we have libunwind info by checking if we are in a
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signal frame. If it doesn't return an error, we have libunwind info
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and can use libunwind. */
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ret = unw_is_signal_frame_p (&cursor);
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2003-11-14 21:17:51 +00:00
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if (ret < 0)
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return NULL;
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return &libunwind_frame_unwind;
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}
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void
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libunwind_frame_this_id (struct frame_info *next_frame, void **this_cache,
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struct frame_id *this_id)
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{
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struct libunwind_frame_cache *cache =
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libunwind_frame_cache (next_frame, this_cache);
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2005-06-08 21:54:23 +00:00
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if (cache != NULL)
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(*this_id) = frame_id_build (cache->base, cache->func_addr);
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else
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(*this_id) = null_frame_id;
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2003-11-14 21:17:51 +00:00
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}
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void
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libunwind_frame_prev_register (struct frame_info *next_frame, void **this_cache,
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int regnum, int *optimizedp,
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enum lval_type *lvalp, CORE_ADDR *addrp,
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2006-03-08 15:28:17 +00:00
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int *realnump, gdb_byte *valuep)
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2003-11-14 21:17:51 +00:00
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{
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struct libunwind_frame_cache *cache =
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libunwind_frame_cache (next_frame, this_cache);
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void *ptr;
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unw_cursor_t *c;
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unw_save_loc_t sl;
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int i, ret;
|
|
|
|
unw_word_t intval;
|
|
|
|
unw_fpreg_t fpval;
|
|
|
|
unw_regnum_t uw_regnum;
|
|
|
|
struct libunwind_descr *descr;
|
|
|
|
|
2005-06-08 21:54:23 +00:00
|
|
|
if (cache == NULL)
|
|
|
|
return;
|
|
|
|
|
2003-11-14 21:17:51 +00:00
|
|
|
/* Convert from gdb register number to libunwind register number. */
|
|
|
|
descr = libunwind_descr (get_frame_arch (next_frame));
|
|
|
|
uw_regnum = descr->gdb2uw (regnum);
|
|
|
|
|
|
|
|
gdb_assert (regnum >= 0);
|
|
|
|
|
|
|
|
if (!target_has_registers)
|
2005-02-10 Andrew Cagney <cagney@gnu.org>
Mark up all error and warning messages.
* ada-lang.c, amd64-tdep.c, arch-utils.c, breakpoint.c: Update.
* bsd-kvm.c, bsd-uthread.c, coff-solib.h, coffread.c: Update.
* core-aout.c, core-regset.c, corefile.c, corelow.c: Update.
* cp-abi.c, cp-support.c, cp-valprint.c, cris-tdep.c: Update.
* dbxread.c, demangle.c, doublest.c, dsrec.c: Update.
* dve3900-rom.c, dwarf2expr.c, dwarf2loc.c: Update.
* dwarf2read.c, dwarfread.c, elfread.c, eval.c: Update.
* event-top.c, exec.c, expprint.c, f-lang.c: Update.
* f-typeprint.c, f-valprint.c, fbsd-nat.c, findvar.c: Update.
* frame.c, frv-linux-tdep.c, gcore.c, gdbtypes.c: Update.
* gnu-nat.c, gnu-v2-abi.c, gnu-v3-abi.c, go32-nat.c: Update.
* hpacc-abi.c, hppa-hpux-nat.c, hppa-hpux-tdep.c: Update.
* hppa-linux-nat.c, hppa-linux-tdep.c, hppa-tdep.c: Update.
* hpread.c, hpux-thread.c, i386-linux-nat.c: Update.
* i386-linux-tdep.c, i386-tdep.c, i386bsd-nat.c: Update.
* i386gnu-nat.c, i387-tdep.c, ia64-linux-nat.c: Update.
* ia64-tdep.c, inf-child.c, inf-ptrace.c, inf-ttrace.c: Update.
* infcall.c, infcmd.c, inflow.c, infptrace.c, infrun.c: Update.
* inftarg.c, interps.c, irix5-nat.c, jv-lang.c: Update.
* kod-cisco.c, kod.c, language.c, libunwind-frame.c: Update.
* linespec.c, linux-nat.c, linux-thread-db.c, m2-lang.c: Update.
* m32r-rom.c, m68hc11-tdep.c, m68k-tdep.c: Update.
* m68klinux-nat.c, macrocmd.c, macroexp.c, main.c: Update.
* maint.c, mdebugread.c, mem-break.c, memattr.c: Update.
* mips-linux-tdep.c, mips-tdep.c, mipsread.c, monitor.c: Update.
* nlmread.c, nto-procfs.c, objc-lang.c, objfiles.c: Update.
* observer.c, ocd.c, p-lang.c, p-typeprint.c: Update.
* p-valprint.c, pa64solib.c, parse.c, ppc-linux-tdep.c: Update.
* ppcnbsd-tdep.c, printcmd.c, procfs.c, remote-e7000.c: Update.
* remote-fileio.c, remote-m32r-sdi.c, remote-rdi.c: Update.
* remote-rdp.c, remote-sim.c, remote-st.c: Update.
* remote-utils.c, remote-utils.h, remote.c: Update.
* rom68k-rom.c, rs6000-nat.c, s390-tdep.c, scm-lang.c: Update.
* ser-e7kpc.c, ser-tcp.c, ser-unix.c, sh-tdep.c: Update.
* sh3-rom.c, shnbsd-tdep.c, sol-thread.c, solib-aix5.c: Update.
* solib-frv.c, solib-irix.c, solib-osf.c, solib-pa64.c: Update.
* solib-som.c, solib-sunos.c, solib-svr4.c, solib.c: Update.
* somread.c, somsolib.c, source.c, stabsread.c: Update.
* stack.c, std-regs.c, symfile-mem.c, symfile.c: Update.
* symmisc.c, symtab.c, target.c, thread.c, top.c: Update.
* tracepoint.c, trad-frame.c, typeprint.c, utils.c: Update.
* uw-thread.c, valarith.c, valops.c, valprint.c: Update.
* value.c, varobj.c, version.in, win32-nat.c, wince.c: Update.
* xcoffread.c, xcoffsolib.c, cli/cli-cmds.c: Update.
* cli/cli-decode.c, cli/cli-dump.c, cli/cli-logging.c: Update.
* cli/cli-script.c, cli/cli-setshow.c, mi/mi-cmd-break.c: Update.
* mi/mi-cmd-disas.c, mi/mi-cmd-env.c, mi/mi-cmd-file.c: Update.
* mi/mi-cmd-stack.c, mi/mi-cmd-var.c, mi/mi-getopt.c: Update.
* mi/mi-symbol-cmds.c, tui/tui-layout.c, tui/tui-stack.c: Update.
* tui/tui-win.c: Update.
2005-02-11 04:06:14 +00:00
|
|
|
error (_("No registers."));
|
2003-11-14 21:17:51 +00:00
|
|
|
|
|
|
|
*optimizedp = 0;
|
|
|
|
*addrp = 0;
|
|
|
|
*lvalp = not_lval;
|
|
|
|
*realnump = -1;
|
|
|
|
|
2004-04-14 15:18:06 +00:00
|
|
|
if (valuep)
|
|
|
|
memset (valuep, 0, register_size (current_gdbarch, regnum));
|
2003-11-14 21:17:51 +00:00
|
|
|
|
|
|
|
if (uw_regnum < 0)
|
|
|
|
return;
|
|
|
|
|
|
|
|
/* To get the previous register, we use the libunwind register APIs with
|
|
|
|
the cursor we have already pushed back to the previous frame. */
|
|
|
|
|
|
|
|
if (descr->is_fpreg (uw_regnum))
|
|
|
|
{
|
|
|
|
ret = unw_get_fpreg_p (&cache->cursor, uw_regnum, &fpval);
|
|
|
|
ptr = &fpval;
|
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
|
|
|
ret = unw_get_reg_p (&cache->cursor, uw_regnum, &intval);
|
|
|
|
ptr = &intval;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (ret < 0)
|
|
|
|
return;
|
|
|
|
|
2004-04-14 15:18:06 +00:00
|
|
|
if (valuep)
|
|
|
|
memcpy (valuep, ptr, register_size (current_gdbarch, regnum));
|
2003-11-14 21:17:51 +00:00
|
|
|
|
|
|
|
if (unw_get_saveloc_p (&cache->cursor, uw_regnum, &sl) < 0)
|
|
|
|
return;
|
|
|
|
|
|
|
|
switch (sl.type)
|
|
|
|
{
|
|
|
|
case UNW_SLT_NONE:
|
|
|
|
*optimizedp = 1;
|
|
|
|
break;
|
|
|
|
|
|
|
|
case UNW_SLT_MEMORY:
|
|
|
|
*lvalp = lval_memory;
|
|
|
|
*addrp = sl.u.addr;
|
|
|
|
break;
|
|
|
|
|
|
|
|
case UNW_SLT_REG:
|
|
|
|
*lvalp = lval_register;
|
|
|
|
*realnump = regnum;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
CORE_ADDR
|
|
|
|
libunwind_frame_base_address (struct frame_info *next_frame, void **this_cache)
|
|
|
|
{
|
|
|
|
struct libunwind_frame_cache *cache =
|
|
|
|
libunwind_frame_cache (next_frame, this_cache);
|
|
|
|
|
2005-06-08 21:54:23 +00:00
|
|
|
if (cache == NULL)
|
|
|
|
return (CORE_ADDR)NULL;
|
2003-11-14 21:17:51 +00:00
|
|
|
return cache->base;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* The following is a glue routine to call the libunwind unwind table
|
|
|
|
search function to get unwind information for a specified ip address. */
|
|
|
|
int
|
|
|
|
libunwind_search_unwind_table (void *as, long ip, void *di,
|
|
|
|
void *pi, int need_unwind_info, void *args)
|
|
|
|
{
|
|
|
|
return unw_search_unwind_table_p (*(unw_addr_space_t *)as, (unw_word_t )ip,
|
|
|
|
di, pi, need_unwind_info, args);
|
|
|
|
}
|
|
|
|
|
2005-06-08 21:54:23 +00:00
|
|
|
/* Verify if we are in a sigtramp frame and we can use libunwind to unwind. */
|
|
|
|
const struct frame_unwind *
|
|
|
|
libunwind_sigtramp_frame_sniffer (struct frame_info *next_frame)
|
|
|
|
{
|
|
|
|
unw_cursor_t cursor;
|
|
|
|
unw_accessors_t *acc;
|
|
|
|
unw_addr_space_t as;
|
|
|
|
struct libunwind_descr *descr;
|
|
|
|
int i, ret;
|
|
|
|
|
|
|
|
/* To test for libunwind unwind support, initialize a cursor to the
|
|
|
|
current frame and try to back up. We use this same method when
|
|
|
|
setting up the frame cache (see libunwind_frame_cache()). 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));
|
|
|
|
acc = descr->accessors;
|
|
|
|
as = unw_create_addr_space_p (acc,
|
|
|
|
TARGET_BYTE_ORDER == BFD_ENDIAN_BIG
|
|
|
|
? __BIG_ENDIAN
|
|
|
|
: __LITTLE_ENDIAN);
|
|
|
|
|
|
|
|
ret = unw_init_remote_p (&cursor, as, next_frame);
|
|
|
|
|
|
|
|
if (ret < 0)
|
|
|
|
return NULL;
|
|
|
|
|
|
|
|
/* Check to see if we are in a signal frame. */
|
|
|
|
ret = unw_is_signal_frame_p (&cursor);
|
|
|
|
if (ret > 0)
|
|
|
|
return &libunwind_frame_unwind;
|
|
|
|
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* The following routine is for accessing special registers of the top frame.
|
|
|
|
A special set of accessors must be given that work without frame info.
|
|
|
|
This is used by ia64 to access the rse registers r32-r127. While they
|
|
|
|
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)
|
|
|
|
{
|
|
|
|
unw_cursor_t cursor;
|
|
|
|
unw_accessors_t *acc;
|
|
|
|
unw_addr_space_t as;
|
|
|
|
struct libunwind_descr *descr;
|
|
|
|
int ret;
|
|
|
|
unw_regnum_t uw_regnum;
|
|
|
|
unw_word_t intval;
|
|
|
|
unw_fpreg_t fpval;
|
|
|
|
void *ptr;
|
|
|
|
|
|
|
|
|
|
|
|
descr = libunwind_descr (gdbarch);
|
|
|
|
acc = descr->special_accessors;
|
|
|
|
as = unw_create_addr_space_p (acc,
|
|
|
|
TARGET_BYTE_ORDER == BFD_ENDIAN_BIG
|
|
|
|
? __BIG_ENDIAN
|
|
|
|
: __LITTLE_ENDIAN);
|
|
|
|
|
|
|
|
ret = unw_init_remote_p (&cursor, as, NULL);
|
|
|
|
if (ret < 0)
|
|
|
|
return -1;
|
|
|
|
|
|
|
|
uw_regnum = descr->gdb2uw (regnum);
|
|
|
|
|
|
|
|
if (descr->is_fpreg (uw_regnum))
|
|
|
|
{
|
|
|
|
ret = unw_get_fpreg_p (&cursor, uw_regnum, &fpval);
|
|
|
|
ptr = &fpval;
|
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
|
|
|
ret = unw_get_reg_p (&cursor, uw_regnum, &intval);
|
|
|
|
ptr = &intval;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (ret < 0)
|
|
|
|
return -1;
|
|
|
|
|
|
|
|
if (buf)
|
|
|
|
memcpy (buf, ptr, register_size (current_gdbarch, regnum));
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2003-11-14 21:17:51 +00:00
|
|
|
static int
|
|
|
|
libunwind_load (void)
|
|
|
|
{
|
|
|
|
void *handle;
|
|
|
|
|
|
|
|
handle = dlopen (LIBUNWIND_SO, RTLD_NOW);
|
|
|
|
if (handle == NULL)
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
/* Initialize pointers to the dynamic library functions we will use. */
|
|
|
|
|
|
|
|
unw_get_reg_p = dlsym (handle, get_reg_name);
|
|
|
|
if (unw_get_reg_p == NULL)
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
unw_get_fpreg_p = dlsym (handle, get_fpreg_name);
|
|
|
|
if (unw_get_fpreg_p == NULL)
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
unw_get_saveloc_p = dlsym (handle, get_saveloc_name);
|
|
|
|
if (unw_get_saveloc_p == NULL)
|
|
|
|
return 0;
|
|
|
|
|
2005-06-08 21:54:23 +00:00
|
|
|
unw_is_signal_frame_p = dlsym (handle, is_signal_frame_name);
|
|
|
|
if (unw_is_signal_frame_p == NULL)
|
|
|
|
return 0;
|
|
|
|
|
2003-11-14 21:17:51 +00:00
|
|
|
unw_step_p = dlsym (handle, step_name);
|
|
|
|
if (unw_step_p == NULL)
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
unw_init_remote_p = dlsym (handle, init_remote_name);
|
|
|
|
if (unw_init_remote_p == NULL)
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
unw_create_addr_space_p = dlsym (handle, create_addr_space_name);
|
|
|
|
if (unw_create_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;
|
|
|
|
|
|
|
|
unw_find_dyn_list_p = dlsym (handle, find_dyn_list_name);
|
|
|
|
if (unw_find_dyn_list_p == NULL)
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
int
|
|
|
|
libunwind_is_initialized (void)
|
|
|
|
{
|
|
|
|
return libunwind_initialized;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Provide a prototype to silence -Wmissing-prototypes. */
|
|
|
|
void _initialize_libunwind_frame (void);
|
|
|
|
|
|
|
|
void
|
|
|
|
_initialize_libunwind_frame (void)
|
|
|
|
{
|
2004-03-15 20:38:08 +00:00
|
|
|
libunwind_descr_handle = gdbarch_data_register_post_init (libunwind_descr_init);
|
2003-11-14 21:17:51 +00:00
|
|
|
|
|
|
|
libunwind_initialized = libunwind_load ();
|
|
|
|
}
|