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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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