| /* Native-dependent code for Alpha BSD's. |
| |
| Copyright (C) 2000-2020 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" |
| |
| struct alpha_bsd_nat_target final : public inf_ptrace_target |
| { |
| void fetch_registers (struct regcache *, int) override; |
| void store_registers (struct regcache *, int) override; |
| }; |
| |
| static alpha_bsd_nat_target the_alpha_bsd_nat_target; |
| |
| /* 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). */ |
| |
| void |
| alpha_bsd_nat_target::fetch_registers (struct regcache *regcache, int regno) |
| { |
| if (regno == -1 || getregs_supplies (regno)) |
| { |
| struct reg gregs; |
| |
| if (ptrace (PT_GETREGS, regcache->ptid ().pid (), |
| (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 (regcache->arch ())) |
| { |
| struct fpreg fpregs; |
| |
| if (ptrace (PT_GETFPREGS, regcache->ptid ().pid (), |
| (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). */ |
| |
| void |
| alpha_bsd_nat_target::store_registers (struct regcache *regcache, int regno) |
| { |
| if (regno == -1 || getregs_supplies (regno)) |
| { |
| struct reg gregs; |
| if (ptrace (PT_GETREGS, regcache->ptid ().pid (), |
| (PTRACE_TYPE_ARG3) &gregs, 0) == -1) |
| perror_with_name (_("Couldn't get registers")); |
| |
| alphabsd_fill_reg (regcache, (char *) &gregs, regno); |
| |
| if (ptrace (PT_SETREGS, regcache->ptid ().pid (), |
| (PTRACE_TYPE_ARG3) &gregs, 0) == -1) |
| perror_with_name (_("Couldn't write registers")); |
| |
| if (regno != -1) |
| return; |
| } |
| |
| if (regno == -1 |
| || regno >= gdbarch_fp0_regnum (regcache->arch ())) |
| { |
| struct fpreg fpregs; |
| |
| if (ptrace (PT_GETFPREGS, regcache->ptid ().pid (), |
| (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, regcache->ptid ().pid (), |
| (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 (ALPHA_SP_REGNUM, &pcb->pcb_hw.apcb_ksp); |
| |
| for (regnum = ALPHA_S0_REGNUM; regnum < ALPHA_A0_REGNUM; regnum++) |
| regcache->raw_supply (regnum, &pcb->pcb_context[regnum - ALPHA_S0_REGNUM]); |
| regcache->raw_supply (ALPHA_RA_REGNUM, &pcb->pcb_context[7]); |
| |
| return 1; |
| } |
| |
| |
| void |
| _initialize_alphabsd_nat (void) |
| { |
| add_inf_child_target (&the_alpha_bsd_nat_target); |
| |
| /* Support debugging kernel virtual memory images. */ |
| bsd_kvm_add_target (alphabsd_supply_pcb); |
| } |