1 /* Native-dependent code for AMD64 BSD's. 2 3 Copyright 2003, 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 /* We include <signal.h> to make sure `struct fxsave64' is defined on 28 NetBSD, since NetBSD's <machine/reg.h> needs it. */ 29 #include "gdb_assert.h" 30 #include <signal.h> 31 #include <sys/types.h> 32 #include <sys/ptrace.h> 33 #include <machine/reg.h> 34 35 #include "amd64-tdep.h" 36 #include "amd64-nat.h" 37 #include "inf-ptrace.h" 38 39 40 /* Fetch register REGNUM from the inferior. If REGNUM is -1, do this 41 for all registers (including the floating-point registers). */ 42 43 static void 44 amd64bsd_fetch_inferior_registers (int regnum) 45 { 46 int pid; 47 48 /* Cater for systems like OpenBSD, that implement threads as 49 separate processes. */ 50 pid = ptid_get_lwp (inferior_ptid); 51 if (pid == 0) 52 pid = ptid_get_pid (inferior_ptid); 53 54 if (regnum == -1 || amd64_native_gregset_supplies_p (regnum)) 55 { 56 struct reg regs; 57 58 if (ptrace (PT_GETREGS, pid, (PTRACE_TYPE_ARG3) ®s, 0) == -1) 59 perror_with_name ("Couldn't get registers"); 60 61 amd64_supply_native_gregset (current_regcache, ®s, -1); 62 if (regnum != -1) 63 return; 64 } 65 66 if (regnum == -1 || !amd64_native_gregset_supplies_p (regnum)) 67 { 68 struct fpreg fpregs; 69 70 if (ptrace (PT_GETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1) 71 perror_with_name ("Couldn't get floating point status"); 72 73 amd64_supply_fxsave (current_regcache, -1, &fpregs); 74 } 75 } 76 77 /* Store register REGNUM back into the inferior. If REGNUM is -1, do 78 this for all registers (including the floating-point registers). */ 79 80 static void 81 amd64bsd_store_inferior_registers (int regnum) 82 { 83 int pid; 84 85 /* Cater for systems like OpenBSD, that implement threads as 86 separate processes. */ 87 pid = ptid_get_lwp (inferior_ptid); 88 if (pid == 0) 89 pid = ptid_get_pid (inferior_ptid); 90 91 if (regnum == -1 || amd64_native_gregset_supplies_p (regnum)) 92 { 93 struct reg regs; 94 95 if (ptrace (PT_GETREGS, pid, (PTRACE_TYPE_ARG3) ®s, 0) == -1) 96 perror_with_name ("Couldn't get registers"); 97 98 amd64_collect_native_gregset (current_regcache, ®s, regnum); 99 100 if (ptrace (PT_SETREGS, pid, (PTRACE_TYPE_ARG3) ®s, 0) == -1) 101 perror_with_name ("Couldn't write registers"); 102 103 if (regnum != -1) 104 return; 105 } 106 107 if (regnum == -1 || !amd64_native_gregset_supplies_p (regnum)) 108 { 109 struct fpreg fpregs; 110 111 if (ptrace (PT_GETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1) 112 perror_with_name ("Couldn't get floating point status"); 113 114 amd64_collect_fxsave (current_regcache, regnum, &fpregs); 115 116 if (ptrace (PT_SETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1) 117 perror_with_name ("Couldn't write floating point status"); 118 } 119 } 120 121 /* Create a prototype *BSD/amd64 target. The client can override it 122 with local methods. */ 123 124 struct target_ops * 125 amd64bsd_target (void) 126 { 127 struct target_ops *t; 128 129 t = inf_ptrace_target (); 130 t->to_fetch_registers = amd64bsd_fetch_inferior_registers; 131 t->to_store_registers = amd64bsd_store_inferior_registers; 132 return t; 133 } 134