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/* Host-dependent code for Sun-3 for GDB, the GNU debugger.
Copyright 1986, 1987, 1989, 1991, 1992 Free Software Foundation, 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 "inferior.h"
#include "gdbcore.h"
#include <sys/ptrace.h>
#define KERNEL /* To get floating point reg definitions */
#include <machine/reg.h>
static void fetch_core_registers (char *, unsigned, int, CORE_ADDR);
void
fetch_inferior_registers (int regno)
{
struct regs inferior_registers;
struct fp_status inferior_fp_registers;
registers_fetched ();
ptrace (PTRACE_GETREGS, inferior_pid,
(PTRACE_ARG3_TYPE) & inferior_registers);
if (FP0_REGNUM >= 0)
ptrace (PTRACE_GETFPREGS, inferior_pid,
(PTRACE_ARG3_TYPE) & inferior_fp_registers);
memcpy (registers, &inferior_registers, 16 * 4);
if (FP0_REGNUM >= 0)
memcpy (®isters[REGISTER_BYTE (FP0_REGNUM)], &inferior_fp_registers,
sizeof inferior_fp_registers.fps_regs);
*(int *) ®isters[REGISTER_BYTE (PS_REGNUM)] = inferior_registers.r_ps;
*(int *) ®isters[REGISTER_BYTE (PC_REGNUM)] = inferior_registers.r_pc;
if (FP0_REGNUM >= 0)
memcpy (®isters[REGISTER_BYTE (FPC_REGNUM)],
&inferior_fp_registers.fps_control,
sizeof inferior_fp_registers -
sizeof inferior_fp_registers.fps_regs);
}
/* Store our register values back into the inferior.
If REGNO is -1, do this for all registers.
Otherwise, REGNO specifies which register (so we can save time). */
void
store_inferior_registers (int regno)
{
struct regs inferior_registers;
struct fp_status inferior_fp_registers;
memcpy (&inferior_registers, registers, 16 * 4);
if (FP0_REGNUM >= 0)
memcpy (&inferior_fp_registers, ®isters[REGISTER_BYTE (FP0_REGNUM)],
sizeof inferior_fp_registers.fps_regs);
inferior_registers.r_ps = *(int *) ®isters[REGISTER_BYTE (PS_REGNUM)];
inferior_registers.r_pc = *(int *) ®isters[REGISTER_BYTE (PC_REGNUM)];
if (FP0_REGNUM >= 0)
memcpy (&inferior_fp_registers.fps_control,
®isters[REGISTER_BYTE (FPC_REGNUM)],
sizeof inferior_fp_registers -
sizeof inferior_fp_registers.fps_regs);
ptrace (PTRACE_SETREGS, inferior_pid,
(PTRACE_ARG3_TYPE) & inferior_registers);
if (FP0_REGNUM >= 0)
ptrace (PTRACE_SETFPREGS, inferior_pid,
(PTRACE_ARG3_TYPE) & inferior_fp_registers);
}
/* All of this stuff is only relevant if both host and target are sun3. */
/* Provide registers to GDB from a core file.
CORE_REG_SECT points to an array of bytes, which were obtained from
a core file which BFD thinks might contain register contents.
CORE_REG_SIZE is its size.
WHICH says which register set corelow suspects this is:
0 --- the general-purpose register set
2 --- the floating-point register set
REG_ADDR isn't used. */
static void
fetch_core_registers (char *core_reg_sect, unsigned core_reg_size,
int which, CORE_ADDR reg_addr)
{
struct regs *regs = (struct regs *) core_reg_sect;
if (which == 0)
{
if (core_reg_size < sizeof (struct regs))
error ("Can't find registers in core file");
memcpy (registers, (char *) regs, 16 * 4);
supply_register (PS_REGNUM, (char *) ®s->r_ps);
supply_register (PC_REGNUM, (char *) ®s->r_pc);
}
else if (which == 2)
{
#define fpustruct ((struct fpu *) core_reg_sect)
if (core_reg_size >= sizeof (struct fpu))
{
if (FP0_REGNUM >= 0)
{
memcpy (®isters[REGISTER_BYTE (FP0_REGNUM)],
fpustruct->f_fpstatus.fps_regs,
sizeof fpustruct->f_fpstatus.fps_regs);
memcpy (®isters[REGISTER_BYTE (FPC_REGNUM)],
&fpustruct->f_fpstatus.fps_control,
sizeof fpustruct->f_fpstatus -
sizeof fpustruct->f_fpstatus.fps_regs);
}
}
else
fprintf_unfiltered (gdb_stderr,
"Couldn't read float regs from core file\n");
}
}
/* Register that we are able to handle sun3 core file formats.
FIXME: is this really bfd_target_unknown_flavour? */
static struct core_fns sun3_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 */
};
void
_initialize_core_sun3 (void)
{
add_core_fns (&sun3_core_fns);
}
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