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[PATCH] OpenBSD/powerpc signal trampoline support
- From: Mark Kettenis <mark dot kettenis at xs4all dot nl>
- To: gdb-patches at sourceware dot org
- Date: Sat, 9 Apr 2005 13:39:44 +0200 (CEST)
- Subject: [PATCH] OpenBSD/powerpc signal trampoline support
Committed,
Mark
Index: ChangeLog
from Mark Kettenis <kettenis@gnu.org>
* ppcobsd-tdep.c: Update copyright year. Include "trad-frame.h"
and "tramp-frame.h".
(ppcobsd_sigtramp_cache_init): New function.
(ppcobsd_sigtramp): New variable.
(ppcobsd_init_abi): Prepend signal trampoline unwinder.
* Makefile.in (ppcobsd-tdep.o): Update dependencies.
Index: ppcobsd-tdep.c
===================================================================
RCS file: /cvs/src/src/gdb/ppcobsd-tdep.c,v
retrieving revision 1.5
diff -u -p -r1.5 ppcobsd-tdep.c
--- ppcobsd-tdep.c 31 Oct 2004 19:43:30 -0000 1.5
+++ ppcobsd-tdep.c 9 Apr 2005 11:37:30 -0000
@@ -1,6 +1,6 @@
/* Target-dependent code for OpenBSD/powerpc.
- Copyright 2004 Free Software Foundation, Inc.
+ Copyright 2004, 2005 Free Software Foundation, Inc.
This file is part of GDB.
@@ -24,8 +24,10 @@
#include "osabi.h"
#include "regcache.h"
#include "regset.h"
-#include "gdb_assert.h"
+#include "trad-frame.h"
+#include "tramp-frame.h"
+#include "gdb_assert.h"
#include "gdb_string.h"
#include "ppc-tdep.h"
@@ -111,6 +113,59 @@ ppcobsd_regset_from_core_section (struct
}
+/* Signal trampolines. */
+
+static void
+ppcobsd_sigtramp_cache_init (const struct tramp_frame *self,
+ struct frame_info *next_frame,
+ struct trad_frame_cache *this_cache,
+ CORE_ADDR func)
+{
+ struct gdbarch *gdbarch = get_frame_arch (next_frame);
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+ CORE_ADDR addr, base;
+ int i;
+
+ base = frame_unwind_register_unsigned (next_frame, SP_REGNUM);
+ addr = base + 0x18 + 2 * tdep->wordsize;
+ for (i = 0; i < ppc_num_gprs; i++, addr += tdep->wordsize)
+ {
+ int regnum = i + tdep->ppc_gp0_regnum;
+ trad_frame_set_reg_addr (this_cache, regnum, addr);
+ }
+ trad_frame_set_reg_addr (this_cache, tdep->ppc_lr_regnum, addr);
+ addr += tdep->wordsize;
+ trad_frame_set_reg_addr (this_cache, tdep->ppc_cr_regnum, addr);
+ addr += tdep->wordsize;
+ trad_frame_set_reg_addr (this_cache, tdep->ppc_xer_regnum, addr);
+ addr += tdep->wordsize;
+ trad_frame_set_reg_addr (this_cache, tdep->ppc_ctr_regnum, addr);
+ addr += tdep->wordsize;
+ trad_frame_set_reg_addr (this_cache, PC_REGNUM, addr); /* SRR0? */
+ addr += tdep->wordsize;
+
+ /* Construct the frame ID using the function start. */
+ trad_frame_set_id (this_cache, frame_id_build (base, func));
+}
+
+static const struct tramp_frame ppcobsd_sigtramp =
+{
+ SIGTRAMP_FRAME,
+ 4,
+ {
+ { 0x3821fff0, -1 }, /* add r1,r1,-16 */
+ { 0x4e800021, -1 }, /* blrl */
+ { 0x38610018, -1 }, /* addi r3,r1,24 */
+ { 0x38000067, -1 }, /* li r0,103 */
+ { 0x44000002, -1 }, /* sc */
+ { 0x38000001, -1 }, /* li r0,1 */
+ { 0x44000002, -1 }, /* sc */
+ { TRAMP_SENTINEL_INSN, -1 }
+ },
+ ppcobsd_sigtramp_cache_init
+};
+
+
static void
ppcobsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
{
@@ -120,6 +175,8 @@ ppcobsd_init_abi (struct gdbarch_info in
set_gdbarch_regset_from_core_section
(gdbarch, ppcobsd_regset_from_core_section);
+
+ tramp_frame_prepend_unwinder (gdbarch, &ppcobsd_sigtramp);
}
Index: Makefile.in
===================================================================
RCS file: /cvs/src/src/gdb/Makefile.in,v
retrieving revision 1.710
diff -u -p -r1.710 Makefile.in
--- Makefile.in 31 Mar 2005 19:58:24 -0000 1.710
+++ Makefile.in 9 Apr 2005 11:37:33 -0000
@@ -2373,8 +2373,9 @@ ppcnbsd-tdep.o: ppcnbsd-tdep.c $(defs_h)
ppcobsd-nat.o: ppcobsd-nat.c $(defs_h) $(inferior_h) $(regcache_h) \
$(ppc_tdep_h) $(ppcobsd_tdep_h)
ppcobsd-tdep.o: ppcobsd-tdep.c $(defs_h) $(arch_utils_h) $(osabi_h) \
- $(regcache_h) $(regset_h) $(gdb_assert_h) $(gdb_string_h) \
- $(ppc_tdep_h) $(ppcobsd_tdep_h) $(solib_svr4_h)
+ $(regcache_h) $(regset_h) $(trad_frame_h_ $(tramp_frame_h) \
+ $(gdb_assert_h) $(gdb_string_h) $(ppc_tdep_h) $(ppcobsd_tdep_h) \
+ $(solib_svr4_h)
ppc-sysv-tdep.o: ppc-sysv-tdep.c $(defs_h) $(gdbcore_h) $(inferior_h) \
$(regcache_h) $(value_h) $(gdb_string_h) $(gdb_assert_h) \
$(ppc_tdep_h) $(target_h) $(objfiles_h) $(infcall_h)