-/* Target-dependent code for NetBSD/Alpha.
+/* Target-dependent code for NetBSD/alpha.
+
+ Copyright (C) 2002-2016 Free Software Foundation, Inc.
- Copyright 2002, 2003, 2004 Free Software Foundation, Inc.
Contributed by Wasabi Systems, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
GNU General Public License for more details.
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. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#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_string.h"
#include "alpha-tdep.h"
#include "alphabsd-tdep.h"
#include "nbsd-tdep.h"
#include "solib-svr4.h"
+#include "target.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 = (const gdb_byte *) 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
-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 = (const gdb_byte *) 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;
+ gdb_assert (len >= ALPHANBSD_SIZEOF_GREGS);
- regs = core_reg_sect;
- fpregs = core_reg_sect + SIZEOF_TRAPFRAME;
-
- 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));
+ if (regnum == ALPHA_PC_REGNUM || regnum == -1)
+ regcache_raw_supply (regcache, ALPHA_PC_REGNUM, regs + 31 * 8);
- /* Floating point registers. */
- alphabsd_supply_fpreg (fpregs, -1);
+ if (len >= ALPHANBSD_SIZEOF_GREGS + ALPHANBSD_SIZEOF_FPREGS)
+ {
+ regs += ALPHANBSD_SIZEOF_GREGS;
+ len -= ALPHANBSD_SIZEOF_GREGS;
+ alphanbsd_supply_fpregset (regset, regcache, regnum, regs, len);
+ }
}
+/* 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_elfcore_registers (char *core_reg_sect, unsigned core_reg_size, int which,
- CORE_ADDR ignore)
+alphanbsd_supply_gregset (const struct regset *regset,
+ struct regcache *regcache,
+ int regnum, const void *gregs, size_t len)
{
- switch (which)
+ const gdb_byte *regs = (const gdb_byte *) gregs;
+ int i;
+
+ 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;
+ alphanbsd_aout_supply_gregset (regset, regcache, regnum, gregs, len);
+ return;
}
+
+ 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);
}
-static struct core_fns alphanbsd_core_fns =
+/* NetBSD/alpha register sets. */
+
+static const struct regset alphanbsd_gregset =
{
- 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_gregset,
+ NULL,
+ REGSET_VARIABLE_SIZE
};
-static struct core_fns alphanbsd_elfcore_fns =
+static const struct regset alphanbsd_fpregset =
{
- 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_supply_fpregset
};
+/* Iterate over supported core file register note sections. */
+
+void
+alphanbsd_iterate_over_regset_sections (struct gdbarch *gdbarch,
+ iterate_over_regset_sections_cb *cb,
+ void *cb_data,
+ const struct regcache *regcache)
+{
+ cb (".reg", ALPHANBSD_SIZEOF_GREGS, &alphanbsd_gregset, NULL, cb_data);
+ cb (".reg2", ALPHANBSD_SIZEOF_FPREGS, &alphanbsd_fpregset, NULL, cb_data);
+}
+\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
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 char sigtramp_retcode[] =
+static const gdb_byte sigtramp_retcode[] =
{
0x00, 0x00, 0x1e, 0xa6, /* ldq a0, 0(sp) */
0x10, 0x00, 0xde, 0x23, /* lda sp, 16(sp) */
#define RETCODE_NWORDS 4
#define RETCODE_SIZE (RETCODE_NWORDS * 4)
-LONGEST
-alphanbsd_sigtramp_offset (CORE_ADDR pc)
+static LONGEST
+alphanbsd_sigtramp_offset (struct gdbarch *gdbarch, CORE_ADDR pc)
{
- unsigned char ret[RETCODE_SIZE], w[4];
+ gdb_byte ret[RETCODE_SIZE], w[4];
LONGEST off;
int i;
- if (deprecated_read_memory_nobpt (pc, (char *) w, 4) != 0)
+ if (target_read_memory (pc, 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 (target_read_memory (pc, ret, sizeof (ret)) != 0)
return -1;
if (memcmp (ret, sigtramp_retcode, RETCODE_SIZE) == 0)
}
static int
-alphanbsd_pc_in_sigtramp (CORE_ADDR pc, char *func_name)
+alphanbsd_pc_in_sigtramp (struct gdbarch *gdbarch,
+ CORE_ADDR pc, const char *func_name)
{
return (nbsd_pc_in_sigtramp (pc, func_name)
- || alphanbsd_sigtramp_offset (pc) >= 0);
+ || alphanbsd_sigtramp_offset (gdbarch, pc) >= 0);
}
static CORE_ADDR
/* 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);
+ if (!get_next_frame (frame))
+ return 0;
+ return get_frame_base (get_next_frame (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_iterate_over_regset_sections
+ (gdbarch, alphanbsd_iterate_over_regset_sections);
+}
+\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);
- gdbarch_register_osabi (bfd_arch_alpha, 0, GDB_OSABI_OPENBSD_ELF,
- alphanbsd_init_abi);
-
- deprecated_add_core_fns (&alphanbsd_core_fns);
- deprecated_add_core_fns (&alphanbsd_elfcore_fns);
}
projects / deliverable / binutils-gdb.git / blobdiff