diff options
Diffstat (limited to 'gdb/alpha-bsd-nat.c')
| -rw-r--r-- | gdb/alpha-bsd-nat.c | 205 |
1 files changed, 205 insertions, 0 deletions
diff --git a/gdb/alpha-bsd-nat.c b/gdb/alpha-bsd-nat.c new file mode 100644 index 0000000..1e58be3 --- /dev/null +++ b/gdb/alpha-bsd-nat.c @@ -0,0 +1,205 @@ +/* Native-dependent code for Alpha BSD's. + + Copyright (C) 2000-2016 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 "alpha-bsd-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, ptid_get_pid (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, ptid_get_pid (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, ptid_get_pid (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, ptid_get_pid (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, ptid_get_pid (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, ptid_get_pid (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/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); +} |