| /* GNU/Linux/x86-64 specific low level interface, for the remote server |
| for GDB. |
| Copyright (C) 2002, 2004, 2005, 2006 |
| Free Software Foundation, Inc. |
| |
| This file is part of GDB. |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program; if not, write to the Free Software |
| Foundation, Inc., 51 Franklin Street, Fifth Floor, |
| Boston, MA 02110-1301, USA. */ |
| |
| #include "server.h" |
| #include "linux-low.h" |
| #include "i387-fp.h" |
| |
| #include "gdb_proc_service.h" |
| |
| #include <sys/reg.h> |
| #include <sys/procfs.h> |
| #include <sys/ptrace.h> |
| |
| /* This definition comes from prctl.h, but some kernels may not have it. */ |
| #ifndef PTRACE_ARCH_PRCTL |
| #define PTRACE_ARCH_PRCTL 30 |
| #endif |
| |
| /* The following definitions come from prctl.h, but may be absent |
| for certain configurations. */ |
| #ifndef ARCH_GET_FS |
| #define ARCH_SET_GS 0x1001 |
| #define ARCH_SET_FS 0x1002 |
| #define ARCH_GET_FS 0x1003 |
| #define ARCH_GET_GS 0x1004 |
| #endif |
| |
| static int x86_64_regmap[] = { |
| RAX * 8, RBX * 8, RCX * 8, RDX * 8, |
| RSI * 8, RDI * 8, RBP * 8, RSP * 8, |
| R8 * 8, R9 * 8, R10 * 8, R11 * 8, |
| R12 * 8, R13 * 8, R14 * 8, R15 * 8, |
| RIP * 8, EFLAGS * 8, CS * 8, SS * 8, |
| DS * 8, ES * 8, FS * 8, GS * 8 |
| }; |
| |
| #define X86_64_NUM_GREGS (sizeof(x86_64_regmap)/sizeof(int)) |
| |
| /* Called by libthread_db. */ |
| |
| ps_err_e |
| ps_get_thread_area (const struct ps_prochandle *ph, |
| lwpid_t lwpid, int idx, void **base) |
| { |
| switch (idx) |
| { |
| case FS: |
| if (ptrace (PTRACE_ARCH_PRCTL, lwpid, base, ARCH_GET_FS) == 0) |
| return PS_OK; |
| break; |
| case GS: |
| if (ptrace (PTRACE_ARCH_PRCTL, lwpid, base, ARCH_GET_GS) == 0) |
| return PS_OK; |
| break; |
| default: |
| return PS_BADADDR; |
| } |
| return PS_ERR; |
| } |
| |
| static void |
| x86_64_fill_gregset (void *buf) |
| { |
| int i; |
| |
| for (i = 0; i < X86_64_NUM_GREGS; i++) |
| collect_register (i, ((char *) buf) + x86_64_regmap[i]); |
| } |
| |
| static void |
| x86_64_store_gregset (const void *buf) |
| { |
| int i; |
| |
| for (i = 0; i < X86_64_NUM_GREGS; i++) |
| supply_register (i, ((char *) buf) + x86_64_regmap[i]); |
| } |
| |
| static void |
| x86_64_fill_fpregset (void *buf) |
| { |
| i387_cache_to_fxsave (buf); |
| } |
| |
| static void |
| x86_64_store_fpregset (const void *buf) |
| { |
| i387_fxsave_to_cache (buf); |
| } |
| |
| struct regset_info target_regsets[] = { |
| { PTRACE_GETREGS, PTRACE_SETREGS, sizeof (elf_gregset_t), |
| GENERAL_REGS, |
| x86_64_fill_gregset, x86_64_store_gregset }, |
| { PTRACE_GETFPREGS, PTRACE_SETFPREGS, sizeof (elf_fpregset_t), |
| FP_REGS, |
| x86_64_fill_fpregset, x86_64_store_fpregset }, |
| { 0, 0, -1, -1, NULL, NULL } |
| }; |
| |
| static const unsigned char x86_64_breakpoint[] = { 0xCC }; |
| #define x86_64_breakpoint_len 1 |
| |
| extern int debug_threads; |
| |
| static CORE_ADDR |
| x86_64_get_pc () |
| { |
| unsigned long pc; |
| |
| collect_register_by_name ("rip", &pc); |
| |
| if (debug_threads) |
| fprintf (stderr, "stop pc (before any decrement) is %08lx\n", pc); |
| return pc; |
| } |
| |
| static void |
| x86_64_set_pc (CORE_ADDR newpc) |
| { |
| if (debug_threads) |
| fprintf (stderr, "set pc to %08lx\n", (long) newpc); |
| supply_register_by_name ("rip", &newpc); |
| } |
| |
| static int |
| x86_64_breakpoint_at (CORE_ADDR pc) |
| { |
| unsigned char c; |
| |
| read_inferior_memory (pc, &c, 1); |
| if (c == 0xCC) |
| return 1; |
| |
| return 0; |
| } |
| |
| struct linux_target_ops the_low_target = { |
| -1, |
| NULL, |
| NULL, |
| NULL, |
| x86_64_get_pc, |
| x86_64_set_pc, |
| x86_64_breakpoint, |
| x86_64_breakpoint_len, |
| NULL, |
| 1, |
| x86_64_breakpoint_at, |
| }; |