Subversion Repositories or1k

/* 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 PARAMS ((char *, unsigned, int, CORE_ADDR));

void

fetch_inferior_registers (regno)

     int regno;

{

  struct regs inferior_registers;

#ifdef FP0_REGNUM

  struct fp_status inferior_fp_registers;

#endif

  registers_fetched ();

  ptrace (PTRACE_GETREGS, inferior_pid,

          (PTRACE_ARG3_TYPE) & inferior_registers);

#ifdef FP0_REGNUM

  ptrace (PTRACE_GETFPREGS, inferior_pid,

          (PTRACE_ARG3_TYPE) & inferior_fp_registers);

#endif

  memcpy (registers, &inferior_registers, 16 * 4);

#ifdef FP0_REGNUM

  memcpy (&registers[REGISTER_BYTE (FP0_REGNUM)], &inferior_fp_registers,

          sizeof inferior_fp_registers.fps_regs);

#endif

  *(int *) &registers[REGISTER_BYTE (PS_REGNUM)] = inferior_registers.r_ps;

  *(int *) &registers[REGISTER_BYTE (PC_REGNUM)] = inferior_registers.r_pc;

#ifdef FP0_REGNUM

  memcpy (&registers[REGISTER_BYTE (FPC_REGNUM)],

          &inferior_fp_registers.fps_control,

      sizeof inferior_fp_registers - sizeof inferior_fp_registers.fps_regs);

#endif

}

/* 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 (regno)

     int regno;

{

  struct regs inferior_registers;

#ifdef FP0_REGNUM

  struct fp_status inferior_fp_registers;

#endif

  memcpy (&inferior_registers, registers, 16 * 4);

#ifdef FP0_REGNUM

  memcpy (&inferior_fp_registers, &registers[REGISTER_BYTE (FP0_REGNUM)],

          sizeof inferior_fp_registers.fps_regs);

#endif

  inferior_registers.r_ps = *(int *) &registers[REGISTER_BYTE (PS_REGNUM)];

  inferior_registers.r_pc = *(int *) &registers[REGISTER_BYTE (PC_REGNUM)];

#ifdef FP0_REGNUM

  memcpy (&inferior_fp_registers.fps_control,

          &registers[REGISTER_BYTE (FPC_REGNUM)],

      sizeof inferior_fp_registers - sizeof inferior_fp_registers.fps_regs);

#endif

  ptrace (PTRACE_SETREGS, inferior_pid,

          (PTRACE_ARG3_TYPE) & inferior_registers);

#if FP0_REGNUM

  ptrace (PTRACE_SETFPREGS, inferior_pid,

          (PTRACE_ARG3_TYPE) & inferior_fp_registers);

#endif

}

/* All of this stuff is only relevant if both host and target are sun3.  */

/* Machine-dependent code for pulling registers out of a Sun-3 core file. */

static void

fetch_core_registers (core_reg_sect, core_reg_size, which, reg_addr)

     char *core_reg_sect;

     unsigned core_reg_size;

     int which;

     CORE_ADDR reg_addr;        /* Unused in this version */

{

  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 *) &regs->r_ps);

      supply_register (PC_REGNUM, (char *) &regs->r_pc);

    }

  else if (which == 2)

    {

#define fpustruct  ((struct fpu *) core_reg_sect)

      if (core_reg_size >= sizeof (struct fpu))

        {

#ifdef FP0_REGNUM

          memcpy (&registers[REGISTER_BYTE (FP0_REGNUM)],

                  fpustruct->f_fpstatus.fps_regs,

                  sizeof fpustruct->f_fpstatus.fps_regs);

          memcpy (&registers[REGISTER_BYTE (FPC_REGNUM)],

                  &fpustruct->f_fpstatus.fps_control,

                  sizeof fpustruct->f_fpstatus -

                  sizeof fpustruct->f_fpstatus.fps_regs);

#endif

        }

      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 ()

{

  add_core_fns (&sun3_core_fns);

}