--- Begin Message ---
- From: Andrew Cagney <cagney at gnu dot org>
- To: gdb-patches at sources dot redhat dot com
- Date: Wed, 31 Mar 2004 18:18:30 -0500
- Subject: [rfa/ppcnbsd] Signal trampoline unwinder
- Delivery-date: Wed, 31 Mar 2004 18:18:55 -0500
- Envelope-to: cagney@gnu.org
Current more-up-to-date version. Ok?
Andrew
2004-03-31 Andrew Cagney <cagney@redhat.com>
* ppcnbsd-tdep.c: Update copyright. Include "tramp-frame.h" and
"trad-frame.h".
(ppcnbsd_sigtramp_cache_init, ppcnbsd_sigtramp): Implement a NetBSD
signal trampoline unwinder.
(ppcnbsd_init_abi): Register ppcnbsd_sigtramp.
Index: ppcnbsd-tdep.c
===================================================================
RCS file: /cvs/src/src/gdb/ppcnbsd-tdep.c,v
retrieving revision 1.12
diff -u -r1.12 ppcnbsd-tdep.c
--- ppcnbsd-tdep.c 23 Mar 2004 14:47:56 -0000 1.12
+++ ppcnbsd-tdep.c 31 Mar 2004 22:57:12 -0000
@@ -1,5 +1,7 @@
/* Target-dependent code for PowerPC systems running NetBSD.
- Copyright 2002, 2003 Free Software Foundation, Inc.
+
+ Copyright 2002, 2003, 2004 Free Software Foundation, Inc.
+
Contributed by Wasabi Systems, Inc.
This file is part of GDB.
@@ -30,6 +32,8 @@
#include "ppc-tdep.h"
#include "ppcnbsd-tdep.h"
#include "nbsd-tdep.h"
+#include "tramp-frame.h"
+#include "trad-frame.h"
#include "solib-svr4.h"
@@ -228,6 +232,59 @@
}
static void
+ppcnbsd_sigtramp_cache_init (const struct tramp_frame *self,
+ struct frame_info *next_frame,
+ struct trad_frame_cache *this_cache,
+ CORE_ADDR func)
+{
+ CORE_ADDR base;
+ CORE_ADDR offset;
+ int i;
+ struct gdbarch *gdbarch = get_frame_arch (next_frame);
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+
+ base = frame_unwind_register_unsigned (next_frame, SP_REGNUM);
+ offset = base + 0x18 + 2 * tdep->wordsize;
+ for (i = 0; i < 32; i++)
+ {
+ int regnum = i + tdep->ppc_gp0_regnum;
+ trad_frame_set_reg_addr (this_cache, regnum, offset);
+ offset += tdep->wordsize;
+ }
+ trad_frame_set_reg_addr (this_cache, tdep->ppc_lr_regnum, offset);
+ offset += tdep->wordsize;
+ trad_frame_set_reg_addr (this_cache, tdep->ppc_cr_regnum, offset);
+ offset += tdep->wordsize;
+ trad_frame_set_reg_addr (this_cache, tdep->ppc_xer_regnum, offset);
+ offset += tdep->wordsize;
+ trad_frame_set_reg_addr (this_cache, tdep->ppc_ctr_regnum, offset);
+ offset += tdep->wordsize;
+ trad_frame_set_reg_addr (this_cache, PC_REGNUM, offset); /* SRR0? */
+ offset += tdep->wordsize;
+
+ /* Construct the frame ID using the function start. */
+ trad_frame_set_id (this_cache, frame_id_build (base, func));
+}
+
+/* Given the NEXT frame, examine the instructions at and around this
+ frame's resume address (aka PC) to see of they look like a signal
+ trampoline. Return the address of the trampolines first
+ instruction, or zero if it isn't a signal trampoline. */
+
+static const struct tramp_frame ppcnbsd_sigtramp = {
+ 4, /* insn size */
+ { /* insn */
+ 0x38610018, /* addi r3,r1,24 */
+ 0x38000127, /* li r0,295 */
+ 0x44000002, /* sc */
+ 0x38000001, /* li r0,1 */
+ 0x44000002, /* sc */
+ TRAMP_SENTINEL_INSN
+ },
+ ppcnbsd_sigtramp_cache_init
+};
+
+static void
ppcnbsd_init_abi (struct gdbarch_info info,
struct gdbarch *gdbarch)
{
@@ -237,6 +294,7 @@
set_gdbarch_return_value (gdbarch, ppcnbsd_return_value);
set_solib_svr4_fetch_link_map_offsets (gdbarch,
nbsd_ilp32_solib_svr4_fetch_link_map_offsets);
+ tramp_frame_append (gdbarch, &ppcnbsd_sigtramp);
}
void
--- End Message ---