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[/] [openrisc/] [trunk/] [gnu-src/] [gdb-6.8/] [gdb/] [alphabsd-nat.c] - Blame information for rev 321

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1 24 jeremybenn
/* Native-dependent code for Alpha BSD's.
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   Copyright (C) 2000, 2001, 2002, 2004, 2005, 2006, 2007, 2008
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   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 "alpha-tdep.h"
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#include "alphabsd-tdep.h"
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#include "inf-ptrace.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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#ifdef HAVE_SYS_PROCFS_H
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#include <sys/procfs.h>
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#endif
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#ifndef HAVE_GREGSET_T
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typedef struct reg gregset_t;
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#endif
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#ifndef HAVE_FPREGSET_T 
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typedef struct fpreg fpregset_t;
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#endif 
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#include "gregset.h"
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/* Provide *regset() wrappers around the generic Alpha BSD register
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   supply/fill routines.  */
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void
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supply_gregset (struct regcache *regcache, const gregset_t *gregsetp)
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{
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  alphabsd_supply_reg (regcache, (const char *) gregsetp, -1);
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}
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void
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fill_gregset (const struct regcache *regcache, gregset_t *gregsetp, int regno)
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{
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  alphabsd_fill_reg (regcache, (char *) gregsetp, regno);
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}
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void
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supply_fpregset (struct regcache *regcache, const fpregset_t *fpregsetp)
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{
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  alphabsd_supply_fpreg (regcache, (const char *) fpregsetp, -1);
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}
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void
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fill_fpregset (const struct regcache *regcache, fpregset_t *fpregsetp, int regno)
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{
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  alphabsd_fill_fpreg (regcache, (char *) fpregsetp, regno);
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}
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/* Determine if PT_GETREGS fetches this register.  */
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static int
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getregs_supplies (int regno)
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{
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  return ((regno >= ALPHA_V0_REGNUM && regno <= ALPHA_ZERO_REGNUM)
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          || regno >= ALPHA_PC_REGNUM);
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}
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/* Fetch register REGNO from the inferior.  If REGNO 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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alphabsd_fetch_inferior_registers (struct regcache *regcache, int regno)
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{
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  if (regno == -1 || getregs_supplies (regno))
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    {
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      struct reg gregs;
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      if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
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                  (PTRACE_TYPE_ARG3) &gregs, 0) == -1)
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        perror_with_name (_("Couldn't get registers"));
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      alphabsd_supply_reg (regcache, (char *) &gregs, regno);
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      if (regno != -1)
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        return;
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    }
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  if (regno == -1 || regno >= gdbarch_fp0_regnum (get_regcache_arch (regcache)))
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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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      alphabsd_supply_fpreg (regcache, (char *) &fpregs, regno);
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    }
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}
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/* Store register REGNO back into the inferior.  If REGNO 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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alphabsd_store_inferior_registers (struct regcache *regcache, int regno)
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{
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  if (regno == -1 || getregs_supplies (regno))
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    {
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      struct reg gregs;
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      if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
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                  (PTRACE_TYPE_ARG3) &gregs, 0) == -1)
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        perror_with_name (_("Couldn't get registers"));
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      alphabsd_fill_reg (regcache, (char *) &gregs, regno);
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      if (ptrace (PT_SETREGS, PIDGET (inferior_ptid),
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                  (PTRACE_TYPE_ARG3) &gregs, 0) == -1)
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        perror_with_name (_("Couldn't write registers"));
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      if (regno != -1)
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        return;
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    }
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  if (regno == -1 || regno >= gdbarch_fp0_regnum (get_regcache_arch (regcache)))
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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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      alphabsd_fill_fpreg (regcache, (char *) &fpregs, regno);
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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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/* Support for debugging kernel virtual memory images.  */
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#include <sys/types.h>
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#include <sys/signal.h>
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#include <machine/pcb.h>
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#include "bsd-kvm.h"
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static int
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alphabsd_supply_pcb (struct regcache *regcache, struct pcb *pcb)
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{
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  int regnum;
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  /* The following is true for OpenBSD 3.9:
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     The pcb contains the register state at the context switch inside
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     cpu_switch().  */
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  /* The stack pointer shouldn't be zero.  */
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  if (pcb->pcb_hw.apcb_ksp == 0)
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    return 0;
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  regcache_raw_supply (regcache, ALPHA_SP_REGNUM, &pcb->pcb_hw.apcb_ksp);
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  for (regnum = ALPHA_S0_REGNUM; regnum < ALPHA_A0_REGNUM; regnum++)
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    regcache_raw_supply (regcache, regnum,
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                         &pcb->pcb_context[regnum - ALPHA_S0_REGNUM]);
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  regcache_raw_supply (regcache, ALPHA_RA_REGNUM, &pcb->pcb_context[7]);
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  return 1;
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}
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/* Provide a prototype to silence -Wmissing-prototypes.  */
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void _initialize_alphabsd_nat (void);
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void
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_initialize_alphabsd_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 = alphabsd_fetch_inferior_registers;
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  t->to_store_registers = alphabsd_store_inferior_registers;
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  add_target (t);
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  /* Support debugging kernel virtual memory images.  */
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  bsd_kvm_add_target (alphabsd_supply_pcb);
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}

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