-/* Target-dependent code for NetBSD/Alpha.
+/* Target-dependent code for NetBSD/alpha.
+
+ Copyright (C) 2002, 2003, 2004, 2006 Free Software Foundation, Inc.
- Copyright 2002, 2003, 2004 Free Software Foundation, Inc.
Contributed by Wasabi Systems, Inc.
This file is part of GDB.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
+ Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ Boston, MA 02110-1301, USA. */
#include "defs.h"
-#include "gdbcore.h"
#include "frame.h"
+#include "gdbcore.h"
+#include "osabi.h"
#include "regcache.h"
+#include "regset.h"
#include "value.h"
-#include "osabi.h"
+#include "gdb_assert.h"
#include "gdb_string.h"
#include "alpha-tdep.h"
#include "nbsd-tdep.h"
#include "solib-svr4.h"
+/* Core file support. */
+
+/* Even though NetBSD/alpha used ELF since day one, it used the
+ traditional a.out-style core dump format before NetBSD 1.6. */
+
+/* Sizeof `struct reg' in <machine/reg.h>. */
+#define ALPHANBSD_SIZEOF_GREGS (32 * 8)
+
+/* Sizeof `struct fpreg' in <machine/reg.h. */
+#define ALPHANBSD_SIZEOF_FPREGS ((32 * 8) + 8)
+
+/* Supply register REGNUM from the buffer specified by FPREGS and LEN
+ in the floating-point register set REGSET to register cache
+ REGCACHE. If REGNUM is -1, do this for all registers in REGSET. */
+
+static void
+alphanbsd_supply_fpregset (const struct regset *regset,
+ struct regcache *regcache,
+ int regnum, const void *fpregs, size_t len)
+{
+ const gdb_byte *regs = fpregs;
+ int i;
+
+ gdb_assert (len >= ALPHANBSD_SIZEOF_FPREGS);
+
+ for (i = ALPHA_FP0_REGNUM; i < ALPHA_FP0_REGNUM + 31; i++)
+ {
+ if (regnum == i || regnum == -1)
+ regcache_raw_supply (regcache, i, regs + (i - ALPHA_FP0_REGNUM) * 8);
+ }
+
+ if (regnum == ALPHA_FPCR_REGNUM || regnum == -1)
+ regcache_raw_supply (regcache, ALPHA_FPCR_REGNUM, regs + 32 * 8);
+}
+
+/* Supply register REGNUM from the buffer specified by GREGS and LEN
+ in the general-purpose register set REGSET to register cache
+ REGCACHE. If REGNUM is -1, do this for all registers in REGSET. */
+
+static void
+alphanbsd_supply_gregset (const struct regset *regset,
+ struct regcache *regcache,
+ int regnum, const void *gregs, size_t len)
+{
+ const gdb_byte *regs = gregs;
+ int i;
+
+ gdb_assert (len >= ALPHANBSD_SIZEOF_GREGS);
+
+ for (i = 0; i < ALPHA_ZERO_REGNUM; i++)
+ {
+ if (regnum == i || regnum == -1)
+ regcache_raw_supply (regcache, i, regs + i * 8);
+ }
+
+ if (regnum == ALPHA_PC_REGNUM || regnum == -1)
+ regcache_raw_supply (regcache, ALPHA_PC_REGNUM, regs + 31 * 8);
+}
+
+/* Supply register REGNUM from the buffer specified by GREGS and LEN
+ in the general-purpose register set REGSET to register cache
+ REGCACHE. If REGNUM is -1, do this for all registers in REGSET. */
+
static void
-fetch_core_registers (char *core_reg_sect, unsigned core_reg_size, int which,
- CORE_ADDR ignore)
+alphanbsd_aout_supply_gregset (const struct regset *regset,
+ struct regcache *regcache,
+ int regnum, const void *gregs, size_t len)
{
- char *regs, *fpregs;
- int regno;
+ const gdb_byte *regs = gregs;
+ int i;
- /* Table to map a gdb register number to a trapframe register index. */
+ /* Table to map a GDB register number to a trapframe register index. */
static const int regmap[] =
{
0, 1, 2, 3,
21, 22, 23, 24,
25, 29, 26
};
-#define SIZEOF_TRAPFRAME (33 * 8)
-
- /* We get everything from one section. */
- if (which != 0)
- return;
- regs = core_reg_sect;
- fpregs = core_reg_sect + SIZEOF_TRAPFRAME;
+ gdb_assert (len >= ALPHANBSD_SIZEOF_GREGS);
- if (core_reg_size < (SIZEOF_TRAPFRAME + SIZEOF_STRUCT_FPREG))
+ for (i = 0; i < ARRAY_SIZE(regmap); i++)
{
- warning ("Wrong size register set in core file.");
- return;
+ if (regnum == i || regnum == -1)
+ regcache_raw_supply (regcache, i, regs + regmap[i] * 8);
}
- /* Integer registers. */
- for (regno = 0; regno < ALPHA_ZERO_REGNUM; regno++)
- regcache_raw_supply (current_regcache, regno, regs + (regmap[regno] * 8));
- regcache_raw_supply (current_regcache, ALPHA_ZERO_REGNUM, NULL);
- regcache_raw_supply (current_regcache, PC_REGNUM, regs + (28 * 8));
-
- /* Floating point registers. */
- alphabsd_supply_fpreg (fpregs, -1);
-}
+ if (regnum == ALPHA_PC_REGNUM || regnum == -1)
+ regcache_raw_supply (regcache, ALPHA_PC_REGNUM, regs + 31 * 8);
-static void
-fetch_elfcore_registers (char *core_reg_sect, unsigned core_reg_size, int which,
- CORE_ADDR ignore)
-{
- switch (which)
+ if (len >= ALPHANBSD_SIZEOF_GREGS + ALPHANBSD_SIZEOF_FPREGS)
{
- case 0: /* Integer registers. */
- if (core_reg_size != SIZEOF_STRUCT_REG)
- warning ("Wrong size register set in core file.");
- else
- alphabsd_supply_reg (core_reg_sect, -1);
- break;
-
- case 2: /* Floating point registers. */
- if (core_reg_size != SIZEOF_STRUCT_FPREG)
- warning ("Wrong size FP register set in core file.");
- else
- alphabsd_supply_fpreg (core_reg_sect, -1);
- break;
-
- default:
- /* Don't know what kind of register request this is; just ignore it. */
- break;
+ regs += ALPHANBSD_SIZEOF_GREGS;
+ len -= ALPHANBSD_SIZEOF_GREGS;
+ alphanbsd_supply_fpregset (regset, regcache, regnum, regs, len);
}
}
-static struct core_fns alphanbsd_core_fns =
+/* NetBSD/alpha register sets. */
+
+static struct regset alphanbsd_gregset =
+{
+ NULL,
+ alphanbsd_supply_gregset
+};
+
+static struct regset alphanbsd_fpregset =
{
- bfd_target_unknown_flavour, /* core_flavour */
- default_check_format, /* check_format */
- default_core_sniffer, /* core_sniffer */
- fetch_core_registers, /* core_read_registers */
- NULL /* next */
+ NULL,
+ alphanbsd_supply_fpregset
};
-static struct core_fns alphanbsd_elfcore_fns =
+static struct regset alphanbsd_aout_gregset =
{
- bfd_target_elf_flavour, /* core_flavour */
- default_check_format, /* check_format */
- default_core_sniffer, /* core_sniffer */
- fetch_elfcore_registers, /* core_read_registers */
- NULL /* next */
+ NULL,
+ alphanbsd_aout_supply_gregset
};
+/* Return the appropriate register set for the core section identified
+ by SECT_NAME and SECT_SIZE. */
+
+const struct regset *
+alphanbsd_regset_from_core_section (struct gdbarch *gdbarch,
+ const char *sect_name, size_t sect_size)
+{
+ if (strcmp (sect_name, ".reg") == 0 && sect_size >= ALPHANBSD_SIZEOF_GREGS)
+ {
+ if (sect_size >= ALPHANBSD_SIZEOF_GREGS + ALPHANBSD_SIZEOF_FPREGS)
+ return &alphanbsd_aout_gregset;
+ else
+ return &alphanbsd_gregset;
+ }
+
+ if (strcmp (sect_name, ".reg2") == 0 && sect_size >= ALPHANBSD_SIZEOF_FPREGS)
+ return &alphanbsd_fpregset;
+
+ return NULL;
+}
+\f
+
+/* Signal trampolines. */
+
/* 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
#define RETCODE_NWORDS 4
#define RETCODE_SIZE (RETCODE_NWORDS * 4)
-LONGEST
+static LONGEST
alphanbsd_sigtramp_offset (CORE_ADDR pc)
{
unsigned char ret[RETCODE_SIZE], w[4];
LONGEST off;
int i;
- if (deprecated_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++)
off = i * 4;
pc -= off;
- if (deprecated_read_memory_nobpt (pc, (char *) ret, sizeof (ret)) != 0)
+ if (read_memory_nobpt (pc, (char *) ret, sizeof (ret)) != 0)
return -1;
if (memcmp (ret, sigtramp_retcode, RETCODE_SIZE) == 0)
out which trampoline frame type we have. */
return get_frame_base (frame);
}
+\f
static void
alphanbsd_init_abi (struct gdbarch_info info,
must use software single-stepping. */
set_gdbarch_software_single_step (gdbarch, alpha_software_single_step);
- set_solib_svr4_fetch_link_map_offsets (gdbarch,
- nbsd_lp64_solib_svr4_fetch_link_map_offsets);
+ /* NetBSD/alpha has SVR4-style shared libraries. */
+ set_solib_svr4_fetch_link_map_offsets
+ (gdbarch, svr4_lp64_fetch_link_map_offsets);
tdep->dynamic_sigtramp_offset = alphanbsd_sigtramp_offset;
tdep->pc_in_sigtramp = alphanbsd_pc_in_sigtramp;
tdep->jb_pc = 2;
tdep->jb_elt_size = 8;
+
+ set_gdbarch_regset_from_core_section
+ (gdbarch, alphanbsd_regset_from_core_section);
+}
+\f
+
+static enum gdb_osabi
+alphanbsd_core_osabi_sniffer (bfd *abfd)
+{
+ if (strcmp (bfd_get_target (abfd), "netbsd-core") == 0)
+ return GDB_OSABI_NETBSD_ELF;
+
+ return GDB_OSABI_UNKNOWN;
}
+\f
+
+/* Provide a prototype to silence -Wmissing-prototypes. */
+void _initialize_alphanbsd_tdep (void);
void
_initialize_alphanbsd_tdep (void)
{
+ /* BFD doesn't set a flavour for NetBSD style a.out core files. */
+ gdbarch_register_osabi_sniffer (bfd_arch_alpha, bfd_target_unknown_flavour,
+ alphanbsd_core_osabi_sniffer);
+
gdbarch_register_osabi (bfd_arch_alpha, 0, GDB_OSABI_NETBSD_ELF,
alphanbsd_init_abi);
-
- deprecated_add_core_fns (&alphanbsd_core_fns);
- deprecated_add_core_fns (&alphanbsd_elfcore_fns);
}
projects / deliverable / binutils-gdb.git / blobdiff