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/* Target-dependent code for SuperH running NetBSD, for GDB.
Copyright 2002 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
(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, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include "defs.h"
#include "gdbcore.h"
#include "regcache.h"
#include "value.h"
#include "solib-svr4.h"
#include "sh-nbsd-tdep.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 */
};
#define SIZEOF_STRUCT_REG (21 * 4)
void
sh_nbsd_supply_registers (char *regs)
{
int regno;
for (regno = R0_REGNUM; regno <= (R0_REGNUM + 15); regno++)
supply_register (regno, regs + regmap[regno - R0_REGNUM]);
supply_register (PC_REGNUM, regs + (0 * 4));
supply_register (SR_REGNUM, regs + (1 * 4));
supply_register (PR_REGNUM, regs + (2 * 4));
supply_register (MACH_REGNUM, regs + (3 * 4));
supply_register (MACL_REGNUM, regs + (4 * 4));
}
void
sh_nbsd_supply_register (char *regs, int regno)
{
if (regno == -1)
sh_nbsd_supply_registers (regs);
if (regno == PC_REGNUM)
supply_register (PC_REGNUM, regs + (0 * 4));
else if (regno == SR_REGNUM)
supply_register (SR_REGNUM, regs + (1 * 4));
else if (regno == PR_REGNUM)
supply_register (PR_REGNUM, regs + (2 * 4));
else if (regno == MACH_REGNUM)
supply_register (MACH_REGNUM, regs + (3 * 4));
else if (regno == MACL_REGNUM)
supply_register (MACL_REGNUM, regs + (4 * 4));
else if (regno >= R0_REGNUM && regno <= (R0_REGNUM + 15))
supply_register (regno, regs + regmap[regno - R0_REGNUM]);
}
void
sh_nbsd_fill_registers (char *regs)
{
int regno;
for (regno = R0_REGNUM; regno <= (R0_REGNUM + 15); regno++)
regcache_collect (regno, regs + regmap[regno - R0_REGNUM]);
regcache_collect (PC_REGNUM, regs + (0 * 4));
regcache_collect (SR_REGNUM, regs + (1 * 4));
regcache_collect (PR_REGNUM, regs + (2 * 4));
regcache_collect (MACH_REGNUM, regs + (3 * 4));
regcache_collect (MACL_REGNUM, regs + (4 * 4));
}
void
sh_nbsd_fill_register (char *regs, int regno)
{
if (regno == -1)
sh_nbsd_fill_registers (regs);
if (regno == PC_REGNUM)
regcache_collect (PC_REGNUM, regs + (0 * 4));
else if (regno == SR_REGNUM)
regcache_collect (SR_REGNUM, regs + (1 * 4));
else if (regno == PR_REGNUM)
regcache_collect (PR_REGNUM, regs + (2 * 4));
else if (regno == MACH_REGNUM)
regcache_collect (MACH_REGNUM, regs + (3 * 4));
else if (regno == MACL_REGNUM)
regcache_collect (MACL_REGNUM, regs + (4 * 4));
else if (regno >= R0_REGNUM && regno <= (R0_REGNUM + 15))
regcache_collect (regno, regs + regmap[regno - R0_REGNUM]);
}
/* Fetch (and possibly build) an appropriate link_map_offsets
structure for NetBSD/sh targets using the struct offsets
defined in <link.h> (but without actual reference to that file).
This makes it possible to access NetBSD/sh shared libraries
from a GDB that was not built on a NetBSD/sh host (for cross
debugging). */
static struct link_map_offsets *
sh_nbsd_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 = 16;
lmo.r_map_offset = 4;
lmo.r_map_size = 4;
lmo.link_map_size = 20;
lmo.l_addr_offset = 0;
lmo.l_addr_size = 4;
lmo.l_name_offset = 4;
lmo.l_name_size = 4;
lmo.l_next_offset = 12;
lmo.l_next_size = 4;
lmo.l_prev_offset = 16;
lmo.l_prev_size = 4;
}
return lmp;
}
static void
fetch_core_registers (char *core_reg_sect, unsigned core_reg_size,
int which, CORE_ADDR ignore)
{
/* We get everything from the .reg section. */
if (which != 0)
return;
if (core_reg_size < SIZEOF_STRUCT_REG)
{
warning ("Wrong size register set in core file.");
return;
}
/* Integer registers. */
sh_nbsd_supply_registers (core_reg_sect);
}
static void
fetch_elfcore_registers (char *core_reg_sect, unsigned core_reg_size,
int which, CORE_ADDR ignore)
{
switch (which)
{
case 0: /* Integer registers. */
if (core_reg_size != SIZEOF_STRUCT_REG)
warning ("Wrong size register set in core file.");
else
sh_nbsd_supply_registers (core_reg_sect);
break;
default:
/* Don't know what kind of register request this is; just ignore it. */
break;
}
}
static struct core_fns sh_nbsd_core_fns =
{
bfd_target_unknown_flavour, /* core_flavour */
default_check_format, /* check_format */
default_core_sniffer, /* core_sniffer */
fetch_core_registers, /* core_read_registers */
NULL /* next */
};
static struct core_fns sh_nbsd_elfcore_fns =
{
bfd_target_elf_flavour, /* core_flavour */
default_check_format, /* check_format */
default_core_sniffer, /* core_sniffer */
fetch_elfcore_registers, /* core_read_registers */
NULL /* next */
};
static void
sh_nbsd_init_abi (struct gdbarch_info info,
struct gdbarch *gdbarch)
{
set_solib_svr4_fetch_link_map_offsets (gdbarch,
sh_nbsd_solib_svr4_fetch_link_map_offsets);
}
void
_initialize_sh_nbsd_tdep (void)
{
add_core_fns (&sh_nbsd_core_fns);
add_core_fns (&sh_nbsd_elfcore_fns);
sh_gdbarch_register_os_abi (SH_OSABI_NETBSD_ELF, sh_nbsd_init_abi);
}
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