1 /* Native-dependent code for OpenBSD/mips64. 2 3 Copyright 2004 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 2 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, write to the Free Software 19 Foundation, Inc., 59 Temple Place - Suite 330, 20 Boston, MA 02111-1307, USA. */ 21 22 #include "defs.h" 23 #include "inferior.h" 24 #include "regcache.h" 25 #include "target.h" 26 27 #include <sys/types.h> 28 #include <sys/ptrace.h> 29 #include <machine/reg.h> 30 31 #include "mips-tdep.h" 32 #include "inf-ptrace.h" 33 34 /* Shorthand for some register numbers used below. */ 35 #define MIPS_PC_REGNUM MIPS_EMBED_PC_REGNUM 36 #define MIPS_FP0_REGNUM MIPS_EMBED_FP0_REGNUM 37 #define MIPS_FSR_REGNUM MIPS_EMBED_FP0_REGNUM + 32 38 39 /* Supply the general-purpose registers stored in GREGS to REGCACHE. */ 40 41 static void 42 mips64obsd_supply_gregset (struct regcache *regcache, const void *gregs) 43 { 44 const char *regs = gregs; 45 int regnum; 46 47 for (regnum = MIPS_ZERO_REGNUM; regnum <= MIPS_PC_REGNUM; regnum++) 48 regcache_raw_supply (regcache, regnum, regs + regnum * 8); 49 50 for (regnum = MIPS_FP0_REGNUM; regnum <= MIPS_FSR_REGNUM; regnum++) 51 regcache_raw_supply (regcache, regnum, regs + (regnum + 2) * 8); 52 } 53 54 /* Collect the general-purpose registers from REGCACHE and store them 55 in GREGS. */ 56 57 static void 58 mips64obsd_collect_gregset (const struct regcache *regcache, 59 void *gregs, int regnum) 60 { 61 char *regs = gregs; 62 int i; 63 64 for (i = MIPS_ZERO_REGNUM; i <= MIPS_PC_REGNUM; i++) 65 { 66 if (regnum == -1 || regnum == i) 67 regcache_raw_collect (regcache, i, regs + i * 8); 68 } 69 70 for (i = MIPS_FP0_REGNUM; i <= MIPS_FSR_REGNUM; i++) 71 { 72 if (regnum == -1 || regnum == i) 73 regcache_raw_collect (regcache, i, regs + (i + 2) * 8); 74 } 75 } 76 77 78 /* Fetch register REGNUM from the inferior. If REGNUM is -1, do this 79 for all registers. */ 80 81 static void 82 mips64obsd_fetch_inferior_registers (int regnum) 83 { 84 struct reg regs; 85 86 if (ptrace (PT_GETREGS, PIDGET (inferior_ptid), 87 (PTRACE_TYPE_ARG3) ®s, 0) == -1) 88 perror_with_name ("Couldn't get registers"); 89 90 mips64obsd_supply_gregset (current_regcache, ®s); 91 } 92 93 /* Store register REGNUM back into the inferior. If REGNUM is -1, do 94 this for all registers. */ 95 96 static void 97 mips64obsd_store_inferior_registers (int regnum) 98 { 99 struct reg regs; 100 101 if (ptrace (PT_GETREGS, PIDGET (inferior_ptid), 102 (PTRACE_TYPE_ARG3) ®s, 0) == -1) 103 perror_with_name ("Couldn't get registers"); 104 105 mips64obsd_collect_gregset (current_regcache, ®s, regnum); 106 107 if (ptrace (PT_SETREGS, PIDGET (inferior_ptid), 108 (PTRACE_TYPE_ARG3) ®s, 0) == -1) 109 perror_with_name ("Couldn't write registers"); 110 } 111 112 113 /* Provide a prototype to silence -Wmissing-prototypes. */ 114 void _initialize_mips64obsd_nat (void); 115 116 void 117 _initialize_mips64obsd_nat (void) 118 { 119 struct target_ops *t; 120 121 t = inf_ptrace_target (); 122 t->to_fetch_registers = mips64obsd_fetch_inferior_registers; 123 t->to_store_registers = mips64obsd_store_inferior_registers; 124 add_target (t); 125 } 126