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2004-04-22 Andrew Cagney <cagney@redhat.com>

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* 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.
This commit is contained in:
Andrew Cagney 2004-04-23 01:02:32 +00:00
parent 0fdea5ce57
commit 476be15e2e
2 changed files with 67 additions and 1 deletions
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8
gdb/ChangeLog
View File

@ -1,3 +1,11 @@
2004-04-22 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.
2004-04-22 Mark Kettenis <kettenis@gnu.org>
Add OpenBSD/powerpc support.

60
gdb/ppcnbsd-tdep.c
View File

@ -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"
@ -227,6 +231,59 @@ ppcnbsd_return_value (struct gdbarch *gdbarch, struct type *valtype,
readbuf, writebuf);
}
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 @@ ppcnbsd_init_abi (struct gdbarch_info info,
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_prepend_unwinder (gdbarch, &ppcnbsd_sigtramp);
}
void