/* Target-dependent code for NetBSD/Alpha.
- Copyright 2002 Free Software Foundation, Inc.
+ Copyright 2002, 2003 Free Software Foundation, Inc.
Contributed by Wasabi Systems, Inc.
This file is part of GDB.
#include "defs.h"
#include "gdbcore.h"
+#include "frame.h"
#include "regcache.h"
#include "value.h"
+#include "osabi.h"
+
+#include "solib-svr4.h"
#include "alpha-tdep.h"
#include "alphabsd-tdep.h"
sequence and can then check whether we really are executing in the
signal trampoline. If not, -1 is returned, otherwise the offset from the
start of the return sequence is returned. */
-static const unsigned int sigtramp_retcode[] =
+static const unsigned char sigtramp_retcode[] =
{
- 0xa61e0000, /* ldq a0, 0(sp) */
- 0x23de0010, /* lda sp, 16(sp) */
- 0x201f0127, /* lda v0, 295(zero) */
- 0x00000083, /* call_pal callsys */
+ 0x00, 0x00, 0x1e, 0xa6, /* ldq a0, 0(sp) */
+ 0x10, 0x00, 0xde, 0x23, /* lda sp, 16(sp) */
+ 0x27, 0x01, 0x1f, 0x20, /* lda v0, 295(zero) */
+ 0x83, 0x00, 0x00, 0x00, /* call_pal callsys */
};
-#define RETCODE_NWORDS \
- (sizeof (sigtramp_retcode) / sizeof (sigtramp_retcode[0]))
+#define RETCODE_NWORDS 4
+#define RETCODE_SIZE (RETCODE_NWORDS * 4)
LONGEST
alphanbsd_sigtramp_offset (CORE_ADDR pc)
{
- unsigned int ret[4], w;
+ unsigned char ret[RETCODE_SIZE], w[4];
LONGEST off;
int i;
- if (read_memory_nobpt (pc, (char *) &w, 4) != 0)
+ if (read_memory_nobpt (pc, (char *) w, 4) != 0)
return -1;
for (i = 0; i < RETCODE_NWORDS; i++)
{
- if (w == sigtramp_retcode[i])
+ if (memcmp (w, sigtramp_retcode + (i * 4), 4) == 0)
break;
}
if (i == RETCODE_NWORDS)
if (read_memory_nobpt (pc, (char *) ret, sizeof (ret)) != 0)
return -1;
- if (memcmp (ret, sigtramp_retcode, sizeof (sigtramp_retcode)) == 0)
+ if (memcmp (ret, sigtramp_retcode, RETCODE_SIZE) == 0)
return off;
return -1;
static int
alphanbsd_pc_in_sigtramp (CORE_ADDR pc, char *func_name)
{
- return (alphanbsd_sigtramp_offset (pc) >= 0);
+ return (nbsd_pc_in_sigtramp (pc, func_name)
+ || alphanbsd_sigtramp_offset (pc) >= 0);
+}
+
+static CORE_ADDR
+alphanbsd_sigcontext_addr (struct frame_info *frame)
+{
+ /* FIXME: This is not correct for all versions of NetBSD/alpha.
+ We will probably need to disassemble the trampoline to figure
+ out which trampoline frame type we have. */
+ return frame->frame;
+}
+
+static CORE_ADDR
+alphanbsd_skip_sigtramp_frame (struct frame_info *frame, CORE_ADDR pc)
+{
+ char *name;
+
+ /* FIXME: This is not correct for all versions of NetBSD/alpha.
+ We will probably need to disassemble the trampoline to figure
+ out which trampoline frame type we have. */
+ find_pc_partial_function (pc, &name, (CORE_ADDR *) NULL, (CORE_ADDR *) NULL);
+ if (PC_IN_SIGTRAMP (pc, name))
+ return frame->frame;
+ return 0;
}
static void
set_solib_svr4_fetch_link_map_offsets (gdbarch,
nbsd_lp64_solib_svr4_fetch_link_map_offsets);
+ tdep->skip_sigtramp_frame = alphanbsd_skip_sigtramp_frame;
tdep->dynamic_sigtramp_offset = alphanbsd_sigtramp_offset;
+ tdep->sigcontext_addr = alphanbsd_sigcontext_addr;
tdep->jb_pc = 2;
tdep->jb_elt_size = 8;
void
_initialize_alphanbsd_tdep (void)
{
- gdbarch_register_osabi (bfd_arch_alpha, GDB_OSABI_NETBSD_ELF,
+ gdbarch_register_osabi (bfd_arch_alpha, 0, GDB_OSABI_NETBSD_ELF,
alphanbsd_init_abi);
add_core_fns (&alphanbsd_core_fns);