1 /* Native-dependent code for FreeBSD/aarch64. 2 3 Copyright (C) 2017-2020 Free Software Foundation, Inc. 4 5 This file is part of GDB. 6 7 This program is free software; you can redistribute it and/or modify 8 it under the terms of the GNU General Public License as published by 9 the Free Software Foundation; either version 3 of the License, or 10 (at your option) any later version. 11 12 This program is distributed in the hope that it will be useful, 13 but WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 GNU General Public License for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with this program. If not, see <http://www.gnu.org/licenses/>. */ 19 20 #include "defs.h" 21 #include "regcache.h" 22 #include "target.h" 23 24 #include <sys/types.h> 25 #include <sys/ptrace.h> 26 #include <machine/reg.h> 27 28 #include "fbsd-nat.h" 29 #include "aarch64-tdep.h" 30 #include "aarch64-fbsd-tdep.h" 31 #include "inf-ptrace.h" 32 33 struct aarch64_fbsd_nat_target final : public fbsd_nat_target 34 { 35 void fetch_registers (struct regcache *, int) override; 36 void store_registers (struct regcache *, int) override; 37 }; 38 39 static aarch64_fbsd_nat_target the_aarch64_fbsd_nat_target; 40 41 /* Determine if PT_GETREGS fetches REGNUM. */ 42 43 static bool 44 getregs_supplies (int regnum) 45 { 46 return (regnum >= AARCH64_X0_REGNUM && regnum <= AARCH64_CPSR_REGNUM); 47 } 48 49 /* Determine if PT_GETFPREGS fetches REGNUM. */ 50 51 static bool 52 getfpregs_supplies (int regnum) 53 { 54 return (regnum >= AARCH64_V0_REGNUM && regnum <= AARCH64_FPCR_REGNUM); 55 } 56 57 /* Fetch register REGNUM from the inferior. If REGNUM is -1, do this 58 for all registers. */ 59 60 void 61 aarch64_fbsd_nat_target::fetch_registers (struct regcache *regcache, 62 int regnum) 63 { 64 pid_t pid = get_ptrace_pid (regcache->ptid ()); 65 66 if (regnum == -1 || getregs_supplies (regnum)) 67 { 68 struct reg regs; 69 70 if (ptrace (PT_GETREGS, pid, (PTRACE_TYPE_ARG3) ®s, 0) == -1) 71 perror_with_name (_("Couldn't get registers")); 72 73 regcache->supply_regset (&aarch64_fbsd_gregset, regnum, ®s, 74 sizeof (regs)); 75 } 76 77 if (regnum == -1 || getfpregs_supplies (regnum)) 78 { 79 struct fpreg fpregs; 80 81 if (ptrace (PT_GETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1) 82 perror_with_name (_("Couldn't get floating point status")); 83 84 regcache->supply_regset (&aarch64_fbsd_fpregset, regnum, &fpregs, 85 sizeof (fpregs)); 86 } 87 } 88 89 /* Store register REGNUM back into the inferior. If REGNUM is -1, do 90 this for all registers. */ 91 92 void 93 aarch64_fbsd_nat_target::store_registers (struct regcache *regcache, 94 int regnum) 95 { 96 pid_t pid = get_ptrace_pid (regcache->ptid ()); 97 98 if (regnum == -1 || getregs_supplies (regnum)) 99 { 100 struct reg regs; 101 102 if (ptrace (PT_GETREGS, pid, (PTRACE_TYPE_ARG3) ®s, 0) == -1) 103 perror_with_name (_("Couldn't get registers")); 104 105 regcache->collect_regset (&aarch64_fbsd_gregset, regnum, ®s, 106 sizeof (regs)); 107 108 if (ptrace (PT_SETREGS, pid, (PTRACE_TYPE_ARG3) ®s, 0) == -1) 109 perror_with_name (_("Couldn't write registers")); 110 } 111 112 if (regnum == -1 || getfpregs_supplies (regnum)) 113 { 114 struct fpreg fpregs; 115 116 if (ptrace (PT_GETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1) 117 perror_with_name (_("Couldn't get floating point status")); 118 119 regcache->collect_regset (&aarch64_fbsd_fpregset, regnum, &fpregs, 120 sizeof (fpregs)); 121 122 if (ptrace (PT_SETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1) 123 perror_with_name (_("Couldn't write floating point status")); 124 } 125 } 126 127 void _initialize_aarch64_fbsd_nat (); 128 void 129 _initialize_aarch64_fbsd_nat () 130 { 131 add_inf_child_target (&the_aarch64_fbsd_nat_target); 132 } 133