/* Target-dependent code for NetBSD/Alpha.
- Copyright 2002 Free Software Foundation, Inc.
+
+ Copyright 2002, 2003, 2004 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 "solib-svr4.h"
+#include "osabi.h"
+
+#include "gdb-string.h"
#include "alpha-tdep.h"
#include "alphabsd-tdep.h"
+#include "nbsd-tdep.h"
+#include "solib-svr4.h"
static void
fetch_core_registers (char *core_reg_sect, unsigned core_reg_size, int which,
for (regno = 0; regno < ALPHA_ZERO_REGNUM; regno++)
supply_register (regno, regs + (regmap[regno] * 8));
supply_register (ALPHA_ZERO_REGNUM, NULL);
- supply_register (FP_REGNUM, NULL);
supply_register (PC_REGNUM, regs + (28 * 8));
/* Floating point registers. */
NULL /* next */
};
-/* Fetch (and possibly build) an appropriate link_map_offsets
- structure for NetBSD/alpha targets using the struct offsets
- defined in <link.h> (but without actual reference to that file).
-
- This makes it possible to access NetBSD/alpha shared libraries
- from a GDB that was not built on a NetBSD/alpha host (for cross
- debugging). */
-
-static struct link_map_offsets *
-alphanbsd_solib_svr4_fetch_link_map_offsets (void)
-{
- static struct link_map_offsets lmo;
- static struct link_map_offsets *lmp = NULL;
-
- if (lmp == NULL)
- {
- lmp = &lmo;
-
- lmo.r_debug_size = 32;
-
- lmo.r_map_offset = 8;
- lmo.r_map_size = 8;
-
- lmo.link_map_size = 40;
-
- lmo.l_addr_offset = 0;
- lmo.l_addr_size = 8;
-
- lmo.l_name_offset = 8;
- lmo.l_name_size = 8;
-
- lmo.l_next_offset = 24;
- lmo.l_next_size = 8;
-
- lmo.l_prev_offset = 32;
- lmo.l_prev_size = 8;
- }
-
- return lmp;
-}
-
/* Under NetBSD/alpha, signal handler invocations can be identified by the
designated code sequence that is used to return from a signal handler.
In particular, the return address of a signal handler points to the
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 get_frame_base (frame);
}
static void
{
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
- set_gdbarch_pc_in_sigtramp (gdbarch, alphanbsd_pc_in_sigtramp);
+ /* Hook into the DWARF CFI frame unwinder. */
+ alpha_dwarf2_init_abi (info, gdbarch);
+
+ /* Hook into the MDEBUG frame unwinder. */
+ alpha_mdebug_init_abi (info, gdbarch);
/* NetBSD/alpha does not provide single step support via ptrace(2); we
must use software single-stepping. */
set_gdbarch_software_single_step (gdbarch, alpha_software_single_step);
set_solib_svr4_fetch_link_map_offsets (gdbarch,
- alphanbsd_solib_svr4_fetch_link_map_offsets);
+ nbsd_lp64_solib_svr4_fetch_link_map_offsets);
tdep->dynamic_sigtramp_offset = alphanbsd_sigtramp_offset;
+ tdep->pc_in_sigtramp = alphanbsd_pc_in_sigtramp;
+ tdep->sigcontext_addr = alphanbsd_sigcontext_addr;
tdep->jb_pc = 2;
tdep->jb_elt_size = 8;
void
_initialize_alphanbsd_tdep (void)
{
- alpha_gdbarch_register_os_abi (ALPHA_ABI_NETBSD, alphanbsd_init_abi);
+ gdbarch_register_osabi (bfd_arch_alpha, 0, GDB_OSABI_NETBSD_ELF,
+ alphanbsd_init_abi);
- add_core_fns (&alphanbsd_core_fns);
- add_core_fns (&alphanbsd_elfcore_fns);
+ deprecated_add_core_fns (&alphanbsd_core_fns);
+ deprecated_add_core_fns (&alphanbsd_elfcore_fns);
}
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