1 /* GNU/Linux/x86-64 specific low level interface, for the remote server 2 for GDB. 3 Copyright 2002, 2004 4 Free Software Foundation, Inc. 5 6 This file is part of GDB. 7 8 This program is free software; you can redistribute it and/or modify 9 it under the terms of the GNU General Public License as published by 10 the Free Software Foundation; either version 2 of the License, or 11 (at your option) any later version. 12 13 This program is distributed in the hope that it will be useful, 14 but WITHOUT ANY WARRANTY; without even the implied warranty of 15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 GNU General Public License for more details. 17 18 You should have received a copy of the GNU General Public License 19 along with this program; if not, write to the Free Software 20 Foundation, Inc., 59 Temple Place - Suite 330, 21 Boston, MA 02111-1307, USA. */ 22 23 #include "server.h" 24 #include "linux-low.h" 25 #include "i387-fp.h" 26 27 /* Correct for all GNU/Linux targets (for quite some time). */ 28 #define GDB_GREGSET_T elf_gregset_t 29 #define GDB_FPREGSET_T elf_fpregset_t 30 31 #ifndef HAVE_ELF_FPREGSET_T 32 /* Make sure we have said types. Not all platforms bring in <linux/elf.h> 33 via <sys/procfs.h>. */ 34 #ifdef HAVE_LINUX_ELF_H 35 #include <linux/elf.h> 36 #endif 37 #endif 38 39 #include "../gdb_proc_service.h" 40 41 #include <sys/reg.h> 42 #include <sys/procfs.h> 43 #include <sys/ptrace.h> 44 45 /* This definition comes from prctl.h, but some kernels may not have it. */ 46 #ifndef PTRACE_ARCH_PRCTL 47 #define PTRACE_ARCH_PRCTL 30 48 #endif 49 50 /* The following definitions come from prctl.h, but may be absent 51 for certain configurations. */ 52 #ifndef ARCH_GET_FS 53 #define ARCH_SET_GS 0x1001 54 #define ARCH_SET_FS 0x1002 55 #define ARCH_GET_FS 0x1003 56 #define ARCH_GET_GS 0x1004 57 #endif 58 59 static int x86_64_regmap[] = { 60 RAX * 8, RBX * 8, RCX * 8, RDX * 8, 61 RSI * 8, RDI * 8, RBP * 8, RSP * 8, 62 R8 * 8, R9 * 8, R10 * 8, R11 * 8, 63 R12 * 8, R13 * 8, R14 * 8, R15 * 8, 64 RIP * 8, EFLAGS * 8, CS * 8, SS * 8, 65 DS * 8, ES * 8, FS * 8, GS * 8 66 }; 67 68 #define X86_64_NUM_GREGS (sizeof(x86_64_regmap)/sizeof(int)) 69 70 /* Called by libthread_db. */ 71 72 ps_err_e 73 ps_get_thread_area (const struct ps_prochandle *ph, 74 lwpid_t lwpid, int idx, void **base) 75 { 76 switch (idx) 77 { 78 case FS: 79 if (ptrace (PTRACE_ARCH_PRCTL, lwpid, base, ARCH_GET_FS) == 0) 80 return PS_OK; 81 break; 82 case GS: 83 if (ptrace (PTRACE_ARCH_PRCTL, lwpid, base, ARCH_GET_GS) == 0) 84 return PS_OK; 85 break; 86 default: 87 return PS_BADADDR; 88 } 89 return PS_ERR; 90 } 91 92 static void 93 x86_64_fill_gregset (void *buf) 94 { 95 int i; 96 97 for (i = 0; i < X86_64_NUM_GREGS; i++) 98 collect_register (i, ((char *) buf) + x86_64_regmap[i]); 99 } 100 101 static void 102 x86_64_store_gregset (const void *buf) 103 { 104 int i; 105 106 for (i = 0; i < X86_64_NUM_GREGS; i++) 107 supply_register (i, ((char *) buf) + x86_64_regmap[i]); 108 } 109 110 static void 111 x86_64_fill_fpregset (void *buf) 112 { 113 i387_cache_to_fxsave (buf); 114 } 115 116 static void 117 x86_64_store_fpregset (const void *buf) 118 { 119 i387_fxsave_to_cache (buf); 120 } 121 122 struct regset_info target_regsets[] = { 123 { PTRACE_GETREGS, PTRACE_SETREGS, sizeof (elf_gregset_t), 124 GENERAL_REGS, 125 x86_64_fill_gregset, x86_64_store_gregset }, 126 { PTRACE_GETFPREGS, PTRACE_SETFPREGS, sizeof (elf_fpregset_t), 127 FP_REGS, 128 x86_64_fill_fpregset, x86_64_store_fpregset }, 129 { 0, 0, -1, -1, NULL, NULL } 130 }; 131 132 struct linux_target_ops the_low_target = { 133 -1, 134 NULL, 135 NULL, 136 NULL, 137 }; 138