| /* Native-dependent code for FreeBSD/aarch64. |
| |
| Copyright (C) 2017 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 "target.h" |
| |
| #include <sys/types.h> |
| #include <sys/ptrace.h> |
| #include <machine/reg.h> |
| |
| #include "fbsd-nat.h" |
| #include "aarch64-tdep.h" |
| #include "aarch64-fbsd-tdep.h" |
| #include "inf-ptrace.h" |
| |
| /* Determine if PT_GETREGS fetches REGNUM. */ |
| |
| static bool |
| getregs_supplies (struct gdbarch *gdbarch, int regnum) |
| { |
| return (regnum >= AARCH64_X0_REGNUM && regnum <= AARCH64_CPSR_REGNUM); |
| } |
| |
| /* Determine if PT_GETFPREGS fetches REGNUM. */ |
| |
| static bool |
| getfpregs_supplies (struct gdbarch *gdbarch, int regnum) |
| { |
| return (regnum >= AARCH64_V0_REGNUM && regnum <= AARCH64_FPCR_REGNUM); |
| } |
| |
| /* Fetch register REGNUM from the inferior. If REGNUM is -1, do this |
| for all registers. */ |
| |
| static void |
| aarch64_fbsd_fetch_inferior_registers (struct target_ops *ops, |
| struct regcache *regcache, int regnum) |
| { |
| pid_t pid = get_ptrace_pid (regcache_get_ptid (regcache)); |
| |
| struct gdbarch *gdbarch = regcache->arch (); |
| if (regnum == -1 || getregs_supplies (gdbarch, regnum)) |
| { |
| struct reg regs; |
| |
| if (ptrace (PT_GETREGS, pid, (PTRACE_TYPE_ARG3) ®s, 0) == -1) |
| perror_with_name (_("Couldn't get registers")); |
| |
| regcache->supply_regset (&aarch64_fbsd_gregset, regnum, ®s, |
| sizeof (regs)); |
| } |
| |
| if (regnum == -1 || getfpregs_supplies (gdbarch, regnum)) |
| { |
| struct fpreg fpregs; |
| |
| if (ptrace (PT_GETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1) |
| perror_with_name (_("Couldn't get floating point status")); |
| |
| regcache->supply_regset (&aarch64_fbsd_fpregset, regnum, &fpregs, |
| sizeof (fpregs)); |
| } |
| } |
| |
| /* Store register REGNUM back into the inferior. If REGNUM is -1, do |
| this for all registers. */ |
| |
| static void |
| aarch64_fbsd_store_inferior_registers (struct target_ops *ops, |
| struct regcache *regcache, int regnum) |
| { |
| pid_t pid = get_ptrace_pid (regcache_get_ptid (regcache)); |
| |
| struct gdbarch *gdbarch = regcache->arch (); |
| if (regnum == -1 || getregs_supplies (gdbarch, regnum)) |
| { |
| struct reg regs; |
| |
| if (ptrace (PT_GETREGS, pid, (PTRACE_TYPE_ARG3) ®s, 0) == -1) |
| perror_with_name (_("Couldn't get registers")); |
| |
| regcache->collect_regset (&aarch64_fbsd_gregset, regnum, ®s, |
| sizeof (regs)); |
| |
| if (ptrace (PT_SETREGS, pid, (PTRACE_TYPE_ARG3) ®s, 0) == -1) |
| perror_with_name (_("Couldn't write registers")); |
| } |
| |
| if (regnum == -1 || getfpregs_supplies (gdbarch, regnum)) |
| { |
| struct fpreg fpregs; |
| |
| if (ptrace (PT_GETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1) |
| perror_with_name (_("Couldn't get floating point status")); |
| |
| regcache->collect_regset (&aarch64_fbsd_fpregset, regnum, &fpregs, |
| sizeof (fpregs)); |
| |
| if (ptrace (PT_SETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1) |
| perror_with_name (_("Couldn't write floating point status")); |
| } |
| } |
| |
| void |
| _initialize_aarch64_fbsd_nat (void) |
| { |
| struct target_ops *t; |
| |
| t = inf_ptrace_target (); |
| t->to_fetch_registers = aarch64_fbsd_fetch_inferior_registers; |
| t->to_store_registers = aarch64_fbsd_store_inferior_registers; |
| fbsd_nat_add_target (t); |
| } |