1 /* Native-dependent code for FreeBSD/mips. 2 3 Copyright (C) 2017-2023 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 "inferior.h" 22 #include "regcache.h" 23 #include "target.h" 24 25 #include <sys/types.h> 26 #include <sys/ptrace.h> 27 #include <machine/reg.h> 28 29 #include "fbsd-nat.h" 30 #include "mips-tdep.h" 31 #include "mips-fbsd-tdep.h" 32 #include "inf-ptrace.h" 33 34 struct mips_fbsd_nat_target final : public fbsd_nat_target 35 { 36 void fetch_registers (struct regcache *, int) override; 37 void store_registers (struct regcache *, int) override; 38 }; 39 40 static mips_fbsd_nat_target the_mips_fbsd_nat_target; 41 42 /* Determine if PT_GETREGS fetches REGNUM. */ 43 44 static bool 45 getregs_supplies (struct gdbarch *gdbarch, int regnum) 46 { 47 return (regnum >= MIPS_ZERO_REGNUM 48 && regnum <= mips_regnum (gdbarch)->pc); 49 } 50 51 /* Determine if PT_GETFPREGS fetches REGNUM. */ 52 53 static bool 54 getfpregs_supplies (struct gdbarch *gdbarch, int regnum) 55 { 56 return (regnum >= mips_regnum (gdbarch)->fp0 57 && regnum <= mips_regnum (gdbarch)->fp_implementation_revision); 58 } 59 60 /* Fetch register REGNUM from the inferior. If REGNUM is -1, do this 61 for all registers. */ 62 63 void 64 mips_fbsd_nat_target::fetch_registers (struct regcache *regcache, int regnum) 65 { 66 pid_t pid = get_ptrace_pid (regcache->ptid ()); 67 68 struct gdbarch *gdbarch = regcache->arch (); 69 if (regnum == -1 || getregs_supplies (gdbarch, regnum)) 70 { 71 struct reg regs; 72 73 if (ptrace (PT_GETREGS, pid, (PTRACE_TYPE_ARG3) ®s, 0) == -1) 74 perror_with_name (_("Couldn't get registers")); 75 76 mips_fbsd_supply_gregs (regcache, regnum, ®s, sizeof (register_t)); 77 } 78 79 if (regnum == -1 || getfpregs_supplies (gdbarch, regnum)) 80 { 81 struct fpreg fpregs; 82 83 if (ptrace (PT_GETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1) 84 perror_with_name (_("Couldn't get floating point status")); 85 86 mips_fbsd_supply_fpregs (regcache, regnum, &fpregs, 87 sizeof (f_register_t)); 88 } 89 } 90 91 /* Store register REGNUM back into the inferior. If REGNUM is -1, do 92 this for all registers. */ 93 94 void 95 mips_fbsd_nat_target::store_registers (struct regcache *regcache, int regnum) 96 { 97 pid_t pid = get_ptrace_pid (regcache->ptid ()); 98 99 struct gdbarch *gdbarch = regcache->arch (); 100 if (regnum == -1 || getregs_supplies (gdbarch, regnum)) 101 { 102 struct reg regs; 103 104 if (ptrace (PT_GETREGS, pid, (PTRACE_TYPE_ARG3) ®s, 0) == -1) 105 perror_with_name (_("Couldn't get registers")); 106 107 mips_fbsd_collect_gregs (regcache, regnum, (char *) ®s, 108 sizeof (register_t)); 109 110 if (ptrace (PT_SETREGS, pid, (PTRACE_TYPE_ARG3) ®s, 0) == -1) 111 perror_with_name (_("Couldn't write registers")); 112 } 113 114 if (regnum == -1 || getfpregs_supplies (gdbarch, regnum)) 115 { 116 struct fpreg fpregs; 117 118 if (ptrace (PT_GETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1) 119 perror_with_name (_("Couldn't get floating point status")); 120 121 mips_fbsd_collect_fpregs (regcache, regnum, (char *) &fpregs, 122 sizeof (f_register_t)); 123 124 if (ptrace (PT_SETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1) 125 perror_with_name (_("Couldn't write floating point status")); 126 } 127 } 128 129 void _initialize_mips_fbsd_nat (); 130 void 131 _initialize_mips_fbsd_nat () 132 { 133 add_inf_child_target (&the_mips_fbsd_nat_target); 134 } 135