1 /* Native-dependent code for OpenBSD/mips64. 2 3 Copyright (C) 2004-2020 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 "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 "mips-tdep.h" 30 #include "inf-ptrace.h" 31 #include "obsd-nat.h" 32 33 /* Shorthand for some register numbers used below. */ 34 #define MIPS_PC_REGNUM MIPS_EMBED_PC_REGNUM 35 #define MIPS_FP0_REGNUM MIPS_EMBED_FP0_REGNUM 36 #define MIPS_FSR_REGNUM MIPS_EMBED_FP0_REGNUM + 32 37 38 struct mips64_obsd_nat_target final : public obsd_nat_target 39 { 40 void fetch_registers (struct regcache *, int) override; 41 void store_registers (struct regcache *, int) override; 42 }; 43 44 static mips64_obsd_nat_target the_mips64_obsd_nat_target; 45 46 /* Supply the general-purpose registers stored in GREGS to REGCACHE. */ 47 48 static void 49 mips64obsd_supply_gregset (struct regcache *regcache, const void *gregs) 50 { 51 const char *regs = gregs; 52 int regnum; 53 54 for (regnum = MIPS_ZERO_REGNUM; regnum <= MIPS_PC_REGNUM; regnum++) 55 regcache->raw_supply (regnum, regs + regnum * 8); 56 57 for (regnum = MIPS_FP0_REGNUM; regnum <= MIPS_FSR_REGNUM; regnum++) 58 regcache->raw_supply (regnum, regs + (regnum + 2) * 8); 59 } 60 61 /* Collect the general-purpose registers from REGCACHE and store them 62 in GREGS. */ 63 64 static void 65 mips64obsd_collect_gregset (const struct regcache *regcache, 66 void *gregs, int regnum) 67 { 68 char *regs = gregs; 69 int i; 70 71 for (i = MIPS_ZERO_REGNUM; i <= MIPS_PC_REGNUM; i++) 72 { 73 if (regnum == -1 || regnum == i) 74 regcache->raw_collect (i, regs + i * 8); 75 } 76 77 for (i = MIPS_FP0_REGNUM; i <= MIPS_FSR_REGNUM; i++) 78 { 79 if (regnum == -1 || regnum == i) 80 regcache->raw_collect (i, regs + (i + 2) * 8); 81 } 82 } 83 84 85 /* Fetch register REGNUM from the inferior. If REGNUM is -1, do this 86 for all registers. */ 87 88 void 89 mips64_obsd_nat_target::fetch_registers (struct regcache *regcache, int regnum) 90 { 91 struct reg regs; 92 pid_t pid = regcache->ptid ().pid (); 93 94 if (ptrace (PT_GETREGS, pid, (PTRACE_TYPE_ARG3) ®s, 0) == -1) 95 perror_with_name (_("Couldn't get registers")); 96 97 mips64obsd_supply_gregset (regcache, ®s); 98 } 99 100 /* Store register REGNUM back into the inferior. If REGNUM is -1, do 101 this for all registers. */ 102 103 static void 104 mips64_obsd_nat_target::store_registers (struct regcache *regcache, int regnum) 105 { 106 struct reg regs; 107 pid_t pid = regcache->ptid ().pid (); 108 109 if (ptrace (PT_GETREGS, pid, (PTRACE_TYPE_ARG3) ®s, 0) == -1) 110 perror_with_name (_("Couldn't get registers")); 111 112 mips64obsd_collect_gregset (regcache, ®s, regnum); 113 114 if (ptrace (PT_SETREGS, pid, (PTRACE_TYPE_ARG3) ®s, 0) == -1) 115 perror_with_name (_("Couldn't write registers")); 116 } 117 118 void _initialize_mips64obsd_nat (); 119 void 120 _initialize_mips64obsd_nat () 121 { 122 add_inf_child_target (&the_mips64_obsd_nat_target); 123 } 124