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[/] [openrisc/] [trunk/] [gnu-src/] [gdb-6.8/] [gdb/] [alphabsd-nat.c] - Rev 158
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/* Native-dependent code for Alpha BSD's. Copyright (C) 2000, 2001, 2002, 2004, 2005, 2006, 2007, 2008 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 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 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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