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/* Target-dependent code for NetBSD/sh.
Copyright (C) 2002, 2003, 2006, 2007, 2008, 2009
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 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "gdbcore.h"
#include "regcache.h"
#include "regset.h"
#include "value.h"
#include "osabi.h"
#include "gdb_assert.h"
#include "gdb_string.h"
#include "sh-tdep.h"
#include "shnbsd-tdep.h"
#include "solib-svr4.h"
/* Convert an r0-r15 register number into an offset into a ptrace
register structure. */
static const int regmap[] =
{
(20 * 4), /* r0 */
(19 * 4), /* r1 */
(18 * 4), /* r2 */
(17 * 4), /* r3 */
(16 * 4), /* r4 */
(15 * 4), /* r5 */
(14 * 4), /* r6 */
(13 * 4), /* r7 */
(12 * 4), /* r8 */
(11 * 4), /* r9 */
(10 * 4), /* r10 */
( 9 * 4), /* r11 */
( 8 * 4), /* r12 */
( 7 * 4), /* r13 */
( 6 * 4), /* r14 */
( 5 * 4), /* r15 */
};
/* Sizeof `struct reg' in <machine/reg.h>. */
#define SHNBSD_SIZEOF_GREGS (21 * 4)
/* 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
shnbsd_supply_gregset (const struct regset *regset,
struct regcache *regcache,
int regnum, const void *gregs, size_t len)
{
struct gdbarch *gdbarch = get_regcache_arch (regcache);
const gdb_byte *regs = gregs;
int i;
gdb_assert (len >= SHNBSD_SIZEOF_GREGS);
if (regnum == gdbarch_pc_regnum (gdbarch) || regnum == -1)
regcache_raw_supply (regcache, gdbarch_pc_regnum (gdbarch),
regs + (0 * 4));
if (regnum == SR_REGNUM || regnum == -1)
regcache_raw_supply (regcache, SR_REGNUM, regs + (1 * 4));
if (regnum == PR_REGNUM || regnum == -1)
regcache_raw_supply (regcache, PR_REGNUM, regs + (2 * 4));
if (regnum == MACH_REGNUM || regnum == -1)
regcache_raw_supply (regcache, MACH_REGNUM, regs + (3 * 4));
if (regnum == MACL_REGNUM || regnum == -1)
regcache_raw_supply (regcache, MACL_REGNUM, regs + (4 * 4));
for (i = R0_REGNUM; i <= (R0_REGNUM + 15); i++)
{
if (regnum == i || regnum == -1)
regcache_raw_supply (regcache, i, regs + regmap[i - R0_REGNUM]);
}
}
/* Collect register REGNUM in the general-purpose register set
REGSET. from register cache REGCACHE into the buffer specified by
GREGS and LEN. If REGNUM is -1, do this for all registers in
REGSET. */
static void
shnbsd_collect_gregset (const struct regset *regset,
const struct regcache *regcache,
int regnum, void *gregs, size_t len)
{
struct gdbarch *gdbarch = get_regcache_arch (regcache);
gdb_byte *regs = gregs;
int i;
gdb_assert (len >= SHNBSD_SIZEOF_GREGS);
if (regnum == gdbarch_pc_regnum (gdbarch) || regnum == -1)
regcache_raw_collect (regcache, gdbarch_pc_regnum (gdbarch),
regs + (0 * 4));
if (regnum == SR_REGNUM || regnum == -1)
regcache_raw_collect (regcache, SR_REGNUM, regs + (1 * 4));
if (regnum == PR_REGNUM || regnum == -1)
regcache_raw_collect (regcache, PR_REGNUM, regs + (2 * 4));
if (regnum == MACH_REGNUM || regnum == -1)
regcache_raw_collect (regcache, MACH_REGNUM, regs + (3 * 4));
if (regnum == MACL_REGNUM || regnum == -1)
regcache_raw_collect (regcache, MACL_REGNUM, regs + (4 * 4));
for (i = R0_REGNUM; i <= (R0_REGNUM + 15); i++)
{
if (regnum == i || regnum == -1)
regcache_raw_collect (regcache, i, regs + regmap[i - R0_REGNUM]);
}
}
/* SH register sets. */
static struct regset shnbsd_gregset =
{
NULL,
shnbsd_supply_gregset,
shnbsd_collect_gregset
};
/* Return the appropriate register set for the core section identified
by SECT_NAME and SECT_SIZE. */
static const struct regset *
shnbsd_regset_from_core_section (struct gdbarch *gdbarch,
const char *sect_name, size_t sect_size)
{
if (strcmp (sect_name, ".reg") == 0 && sect_size >= SHNBSD_SIZEOF_GREGS)
return &shnbsd_gregset;
return NULL;
}
void
shnbsd_supply_reg (struct regcache *regcache, const char *regs, int regnum)
{
shnbsd_supply_gregset (&shnbsd_gregset, regcache, regnum,
regs, SHNBSD_SIZEOF_GREGS);
}
void
shnbsd_fill_reg (const struct regcache *regcache, char *regs, int regnum)
{
shnbsd_collect_gregset (&shnbsd_gregset, regcache, regnum,
regs, SHNBSD_SIZEOF_GREGS);
}
static void
shnbsd_init_abi (struct gdbarch_info info,
struct gdbarch *gdbarch)
{
set_gdbarch_regset_from_core_section
(gdbarch, shnbsd_regset_from_core_section);
set_solib_svr4_fetch_link_map_offsets
(gdbarch, svr4_ilp32_fetch_link_map_offsets);
}
/* OpenBSD uses uses the traditional NetBSD core file format, even for
ports that use ELF. */
#define GDB_OSABI_NETBSD_CORE GDB_OSABI_OPENBSD_ELF
static enum gdb_osabi
shnbsd_core_osabi_sniffer (bfd *abfd)
{
if (strcmp (bfd_get_target (abfd), "netbsd-core") == 0)
return GDB_OSABI_NETBSD_CORE;
return GDB_OSABI_UNKNOWN;
}
/* Provide a prototype to silence -Wmissing-prototypes. */
extern initialize_file_ftype _initialize_shnbsd_tdep;
void
_initialize_shnbsd_tdep (void)
{
/* BFD doesn't set a flavour for NetBSD style a.out core files. */
gdbarch_register_osabi_sniffer (bfd_arch_sh, bfd_target_unknown_flavour,
shnbsd_core_osabi_sniffer);
gdbarch_register_osabi (bfd_arch_sh, 0, GDB_OSABI_NETBSD_ELF,
shnbsd_init_abi);
gdbarch_register_osabi (bfd_arch_sh, 0, GDB_OSABI_OPENBSD_ELF,
shnbsd_init_abi);
}
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