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[/] [openrisc/] [trunk/] [gnu-src/] [gdb-7.1/] [gdb/] [alphabsd-nat.c] - Rev 280
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/* Native-dependent code for Alpha BSD's. Copyright (C) 2000, 2001, 2002, 2004, 2005, 2006, 2007, 2008, 2009, 2010 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 3 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, see <http://www.gnu.org/licenses/>. */ #include "defs.h" #include "inferior.h" #include "regcache.h" #include "alpha-tdep.h" #include "alphabsd-tdep.h" #include "inf-ptrace.h" #include <sys/types.h> #include <sys/ptrace.h> #include <machine/reg.h> #ifdef HAVE_SYS_PROCFS_H #include <sys/procfs.h> #endif #ifndef HAVE_GREGSET_T typedef struct reg gregset_t; #endif #ifndef HAVE_FPREGSET_T typedef struct fpreg fpregset_t; #endif #include "gregset.h" /* Provide *regset() wrappers around the generic Alpha BSD register supply/fill routines. */ void supply_gregset (struct regcache *regcache, const gregset_t *gregsetp) { alphabsd_supply_reg (regcache, (const char *) gregsetp, -1); } void fill_gregset (const struct regcache *regcache, gregset_t *gregsetp, int regno) { alphabsd_fill_reg (regcache, (char *) gregsetp, regno); } void supply_fpregset (struct regcache *regcache, const fpregset_t *fpregsetp) { alphabsd_supply_fpreg (regcache, (const char *) fpregsetp, -1); } void fill_fpregset (const struct regcache *regcache, fpregset_t *fpregsetp, int regno) { alphabsd_fill_fpreg (regcache, (char *) fpregsetp, regno); } /* Determine if PT_GETREGS fetches this register. */ static int getregs_supplies (int regno) { return ((regno >= ALPHA_V0_REGNUM && regno <= ALPHA_ZERO_REGNUM) || regno >= ALPHA_PC_REGNUM); } /* Fetch register REGNO from the inferior. If REGNO is -1, do this for all registers (including the floating point registers). */ static void alphabsd_fetch_inferior_registers (struct target_ops *ops, struct regcache *regcache, int regno) { if (regno == -1 || getregs_supplies (regno)) { struct reg gregs; if (ptrace (PT_GETREGS, PIDGET (inferior_ptid), (PTRACE_TYPE_ARG3) &gregs, 0) == -1) perror_with_name (_("Couldn't get registers")); alphabsd_supply_reg (regcache, (char *) &gregs, regno); if (regno != -1) return; } if (regno == -1 || regno >= gdbarch_fp0_regnum (get_regcache_arch (regcache))) { struct fpreg fpregs; if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid), (PTRACE_TYPE_ARG3) &fpregs, 0) == -1) perror_with_name (_("Couldn't get floating point status")); alphabsd_supply_fpreg (regcache, (char *) &fpregs, regno); } } /* Store register REGNO back into the inferior. If REGNO is -1, do this for all registers (including the floating point registers). */ static void alphabsd_store_inferior_registers (struct target_ops *ops, struct regcache *regcache, int regno) { if (regno == -1 || getregs_supplies (regno)) { struct reg gregs; if (ptrace (PT_GETREGS, PIDGET (inferior_ptid), (PTRACE_TYPE_ARG3) &gregs, 0) == -1) perror_with_name (_("Couldn't get registers")); alphabsd_fill_reg (regcache, (char *) &gregs, regno); if (ptrace (PT_SETREGS, PIDGET (inferior_ptid), (PTRACE_TYPE_ARG3) &gregs, 0) == -1) perror_with_name (_("Couldn't write registers")); if (regno != -1) return; } if (regno == -1 || regno >= gdbarch_fp0_regnum (get_regcache_arch (regcache))) { struct fpreg fpregs; if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid), (PTRACE_TYPE_ARG3) &fpregs, 0) == -1) perror_with_name (_("Couldn't get floating point status")); alphabsd_fill_fpreg (regcache, (char *) &fpregs, regno); if (ptrace (PT_SETFPREGS, PIDGET (inferior_ptid), (PTRACE_TYPE_ARG3) &fpregs, 0) == -1) perror_with_name (_("Couldn't write floating point status")); } } /* Support for debugging kernel virtual memory images. */ #include <sys/types.h> #include <sys/signal.h> #include <machine/pcb.h> #include "bsd-kvm.h" static int alphabsd_supply_pcb (struct regcache *regcache, struct pcb *pcb) { int regnum; /* The following is true for OpenBSD 3.9: The pcb contains the register state at the context switch inside cpu_switch(). */ /* The stack pointer shouldn't be zero. */ if (pcb->pcb_hw.apcb_ksp == 0) return 0; regcache_raw_supply (regcache, ALPHA_SP_REGNUM, &pcb->pcb_hw.apcb_ksp); for (regnum = ALPHA_S0_REGNUM; regnum < ALPHA_A0_REGNUM; regnum++) regcache_raw_supply (regcache, regnum, &pcb->pcb_context[regnum - ALPHA_S0_REGNUM]); regcache_raw_supply (regcache, ALPHA_RA_REGNUM, &pcb->pcb_context[7]); return 1; } /* Provide a prototype to silence -Wmissing-prototypes. */ void _initialize_alphabsd_nat (void); void _initialize_alphabsd_nat (void) { struct target_ops *t; t = inf_ptrace_target (); t->to_fetch_registers = alphabsd_fetch_inferior_registers; t->to_store_registers = alphabsd_store_inferior_registers; add_target (t); /* Support debugging kernel virtual memory images. */ bsd_kvm_add_target (alphabsd_supply_pcb); }
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