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[/] [openrisc/] [trunk/] [gnu-src/] [gdb-6.8/] [gdb/] [hppabsd-nat.c] - Blame information for rev 280

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1 24 jeremybenn
/* Native-dependent code for HP PA-RISC BSD's.
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   Copyright (C) 2004, 2005, 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 "hppa-tdep.h"
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#include "inf-ptrace.h"
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static int
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hppabsd_gregset_supplies_p (int regnum)
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{
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  return (regnum >= HPPA_R0_REGNUM && regnum <= HPPA_PCOQ_TAIL_REGNUM);
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}
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static int
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hppabsd_fpregset_supplies_p (int regnum)
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{
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  return (regnum >= HPPA_FP0_REGNUM && regnum <= HPPA_FP31R_REGNUM);
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}
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/* Supply the general-purpose registers stored in GREGS to REGCACHE.  */
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static void
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hppabsd_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 = HPPA_R1_REGNUM; regnum <= HPPA_R31_REGNUM; regnum++)
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    regcache_raw_supply (regcache, regnum, regs + regnum * 4);
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  regcache_raw_supply (regcache, HPPA_SAR_REGNUM, regs);
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  regcache_raw_supply (regcache, HPPA_PCOQ_HEAD_REGNUM, regs + 32 * 4);
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  regcache_raw_supply (regcache, HPPA_PCOQ_TAIL_REGNUM, regs + 33 * 4);
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}
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/* Supply the floating-point registers stored in FPREGS to REGCACHE.  */
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static void
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hppabsd_supply_fpregset (struct regcache *regcache, const void *fpregs)
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{
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  const char *regs = fpregs;
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  int regnum;
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  for (regnum = HPPA_FP0_REGNUM; regnum <= HPPA_FP31R_REGNUM;
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       regnum += 2, regs += 8)
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    {
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      regcache_raw_supply (regcache, regnum, regs);
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      regcache_raw_supply (regcache, regnum + 1, regs + 4);
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    }
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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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hppabsd_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 = HPPA_R1_REGNUM; i <= HPPA_R31_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 * 4);
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    }
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  if (regnum == -1 || regnum == HPPA_SAR_REGNUM)
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    regcache_raw_collect (regcache, HPPA_SAR_REGNUM, regs);
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  if (regnum == -1 || regnum == HPPA_PCOQ_HEAD_REGNUM)
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    regcache_raw_collect (regcache, HPPA_PCOQ_HEAD_REGNUM, regs + 32 * 4);
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  if (regnum == -1 || regnum == HPPA_PCOQ_TAIL_REGNUM)
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    regcache_raw_collect (regcache, HPPA_PCOQ_TAIL_REGNUM, regs + 33 * 4);
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}
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/* Collect the floating-point registers from REGCACHE and store them
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   in FPREGS.  */
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static void
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hppabsd_collect_fpregset (struct regcache *regcache,
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                          void *fpregs, int regnum)
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{
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  char *regs = fpregs;
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  int i;
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  for (i = HPPA_FP0_REGNUM; i <= HPPA_FP31R_REGNUM; i += 2, regs += 8)
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    {
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      if (regnum == -1 || regnum == i || regnum == i + 1)
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        {
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          regcache_raw_collect (regcache, i, regs);
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          regcache_raw_collect (regcache, i + 1, regs + 4);
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        }
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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 (including the floating-point registers).  */
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static void
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hppabsd_fetch_registers (struct regcache *regcache, int regnum)
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{
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  if (regnum == -1 || hppabsd_gregset_supplies_p (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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      hppabsd_supply_gregset (regcache, &regs);
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    }
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  if (regnum == -1 || hppabsd_fpregset_supplies_p (regnum))
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    {
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      struct fpreg fpregs;
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      if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid),
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                  (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
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        perror_with_name (_("Couldn't get floating point status"));
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      hppabsd_supply_fpregset (regcache, &fpregs);
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    }
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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 (including the floating-point registers).  */
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static void
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hppabsd_store_registers (struct regcache *regcache, int regnum)
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{
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  if (regnum == -1 || hppabsd_gregset_supplies_p (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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      hppabsd_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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  if (regnum == -1 || hppabsd_fpregset_supplies_p (regnum))
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    {
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      struct fpreg fpregs;
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      if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid),
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                  (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
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        perror_with_name (_("Couldn't get floating point status"));
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      hppabsd_collect_fpregset (regcache, &fpregs, regnum);
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      if (ptrace (PT_SETFPREGS, PIDGET (inferior_ptid),
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                  (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
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        perror_with_name (_("Couldn't write floating point status"));
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    }
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}
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/* Provide a prototype to silence -Wmissing-prototypes.  */
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void _initialize_hppabsd_nat (void);
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void
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_initialize_hppabsd_nat (void)
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{
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  struct target_ops *t;
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  /* Add in local overrides.  */
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  t = inf_ptrace_target ();
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  t->to_fetch_registers = hppabsd_fetch_registers;
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  t->to_store_registers = hppabsd_store_registers;
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  add_target (t);
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}

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