| /* Native-dependent code for FreeBSD/arm. |
| |
| 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 "arm-tdep.h" |
| #include "arm-fbsd-tdep.h" |
| #include "inf-ptrace.h" |
| |
| /* Determine if PT_GETREGS fetches REGNUM. */ |
| |
| static bool |
| getregs_supplies (struct gdbarch *gdbarch, int regnum) |
| { |
| return ((regnum >= ARM_A1_REGNUM && regnum <= ARM_PC_REGNUM) |
| || regnum == ARM_PS_REGNUM); |
| } |
| |
| #ifdef PT_GETVFPREGS |
| /* Determine if PT_GETVFPREGS fetches REGNUM. */ |
| |
| static bool |
| getvfpregs_supplies (struct gdbarch *gdbarch, int regnum) |
| { |
| return ((regnum >= ARM_D0_REGNUM && regnum <= ARM_D31_REGNUM) |
| || regnum == ARM_FPSCR_REGNUM); |
| } |
| #endif |
| |
| /* Fetch register REGNUM from the inferior. If REGNUM is -1, do this |
| for all registers. */ |
| |
| static void |
| arm_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 = get_regcache_arch (regcache); |
| 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 (&arm_fbsd_gregset, regnum, ®s, |
| sizeof (regs)); |
| } |
| |
| #ifdef PT_GETVFPREGS |
| if (regnum == -1 || getvfpregs_supplies (gdbarch, regnum)) |
| { |
| struct vfpreg vfpregs; |
| |
| if (ptrace (PT_GETVFPREGS, pid, (PTRACE_TYPE_ARG3) &vfpregs, 0) == -1) |
| perror_with_name (_("Couldn't get floating point status")); |
| |
| regcache->supply_regset (&arm_fbsd_vfpregset, regnum, &vfpregs, |
| sizeof (vfpregs)); |
| } |
| #endif |
| } |
| |
| /* Store register REGNUM back into the inferior. If REGNUM is -1, do |
| this for all registers. */ |
| |
| static void |
| arm_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 = get_regcache_arch (regcache); |
| 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 (&arm_fbsd_gregset, regnum, ®s, |
| sizeof (regs)); |
| |
| if (ptrace (PT_SETREGS, pid, (PTRACE_TYPE_ARG3) ®s, 0) == -1) |
| perror_with_name (_("Couldn't write registers")); |
| } |
| |
| #ifdef PT_GETVFPREGS |
| if (regnum == -1 || getvfpregs_supplies (gdbarch, regnum)) |
| { |
| struct vfpreg vfpregs; |
| |
| if (ptrace (PT_GETVFPREGS, pid, (PTRACE_TYPE_ARG3) &vfpregs, 0) == -1) |
| perror_with_name (_("Couldn't get floating point status")); |
| |
| regcache->collect_regset (&arm_fbsd_vfpregset, regnum, &vfpregs, |
| sizeof (vfpregs)); |
| |
| if (ptrace (PT_SETVFPREGS, pid, (PTRACE_TYPE_ARG3) &vfpregs, 0) == -1) |
| perror_with_name (_("Couldn't write floating point status")); |
| } |
| #endif |
| } |
| |
| /* Implement the to_read_description method. */ |
| |
| static const struct target_desc * |
| arm_fbsd_read_description (struct target_ops *ops) |
| { |
| const struct target_desc *desc; |
| |
| desc = arm_fbsd_read_description_auxv (ops); |
| if (desc == NULL) |
| desc = ops->beneath->to_read_description (ops->beneath); |
| return desc; |
| } |
| |
| void |
| _initialize_arm_fbsd_nat (void) |
| { |
| struct target_ops *t; |
| |
| t = inf_ptrace_target (); |
| t->to_fetch_registers = arm_fbsd_fetch_inferior_registers; |
| t->to_store_registers = arm_fbsd_store_inferior_registers; |
| t->to_read_description = arm_fbsd_read_description; |
| fbsd_nat_add_target (t); |
| } |