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[/] [openrisc/] [trunk/] [gnu-old/] [gdb-6.8/] [gdb/] [mips64obsd-nat.c] - Blame information for rev 840

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1 24 jeremybenn
/* Native-dependent code for OpenBSD/mips64.
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   Copyright (C) 2004, 2007, 2008 Free Software Foundation, Inc.
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   This file is part of GDB.
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   This program is free software; you can redistribute it and/or modify
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   it under the terms of the GNU General Public License as published by
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   the Free Software Foundation; either version 3 of the License, or
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   (at your option) any later version.
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   This program is distributed in the hope that it will be useful,
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   but WITHOUT ANY WARRANTY; without even the implied warranty of
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   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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   GNU General Public License for more details.
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   You should have received a copy of the GNU General Public License
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   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
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#include "defs.h"
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#include "inferior.h"
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#include "regcache.h"
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#include "target.h"
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#include <sys/types.h>
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#include <sys/ptrace.h>
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#include <machine/reg.h>
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#include "mips-tdep.h"
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#include "inf-ptrace.h"
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/* Shorthand for some register numbers used below.  */
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#define MIPS_PC_REGNUM  MIPS_EMBED_PC_REGNUM
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#define MIPS_FP0_REGNUM MIPS_EMBED_FP0_REGNUM
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#define MIPS_FSR_REGNUM MIPS_EMBED_FP0_REGNUM + 32
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/* Supply the general-purpose registers stored in GREGS to REGCACHE.  */
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static void
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mips64obsd_supply_gregset (struct regcache *regcache, const void *gregs)
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{
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  const char *regs = gregs;
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  int regnum;
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  for (regnum = MIPS_ZERO_REGNUM; regnum <= MIPS_PC_REGNUM; regnum++)
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    regcache_raw_supply (regcache, regnum, regs + regnum * 8);
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  for (regnum = MIPS_FP0_REGNUM; regnum <= MIPS_FSR_REGNUM; regnum++)
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    regcache_raw_supply (regcache, regnum, regs + (regnum + 2) * 8);
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}
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/* Collect the general-purpose registers from REGCACHE and store them
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   in GREGS.  */
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static void
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mips64obsd_collect_gregset (const struct regcache *regcache,
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                            void *gregs, int regnum)
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{
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  char *regs = gregs;
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  int i;
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  for (i = MIPS_ZERO_REGNUM; i <= MIPS_PC_REGNUM; i++)
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    {
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      if (regnum == -1 || regnum == i)
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        regcache_raw_collect (regcache, i, regs + i * 8);
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    }
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  for (i = MIPS_FP0_REGNUM; i <= MIPS_FSR_REGNUM; i++)
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    {
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      if (regnum == -1 || regnum == i)
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        regcache_raw_collect (regcache, i, regs + (i + 2) * 8);
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    }
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}
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/* Fetch register REGNUM from the inferior.  If REGNUM is -1, do this
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   for all registers.  */
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static void
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mips64obsd_fetch_inferior_registers (struct regcache *regcache, int regnum)
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{
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  struct reg regs;
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  if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
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              (PTRACE_TYPE_ARG3) &regs, 0) == -1)
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    perror_with_name (_("Couldn't get registers"));
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  mips64obsd_supply_gregset (regcache, &regs);
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}
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/* Store register REGNUM back into the inferior.  If REGNUM is -1, do
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   this for all registers.  */
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static void
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mips64obsd_store_inferior_registers (struct regcache *regcache, int regnum)
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{
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  struct reg regs;
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  if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
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              (PTRACE_TYPE_ARG3) &regs, 0) == -1)
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    perror_with_name (_("Couldn't get registers"));
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  mips64obsd_collect_gregset (regcache, &regs, regnum);
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  if (ptrace (PT_SETREGS, PIDGET (inferior_ptid),
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              (PTRACE_TYPE_ARG3) &regs, 0) == -1)
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    perror_with_name (_("Couldn't write registers"));
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}
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/* Provide a prototype to silence -Wmissing-prototypes.  */
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void _initialize_mips64obsd_nat (void);
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void
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_initialize_mips64obsd_nat (void)
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{
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  struct target_ops *t;
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  t = inf_ptrace_target ();
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  t->to_fetch_registers = mips64obsd_fetch_inferior_registers;
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  t->to_store_registers = mips64obsd_store_inferior_registers;
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  add_target (t);
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}

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