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138 lines
3.4 KiB
C
138 lines
3.4 KiB
C
/* GNU/Linux/x86-64 specific low level interface, for the remote server
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for GDB.
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Copyright 2002, 2004
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Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include "server.h"
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#include "linux-low.h"
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#include "i387-fp.h"
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/* Correct for all GNU/Linux targets (for quite some time). */
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#define GDB_GREGSET_T elf_gregset_t
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#define GDB_FPREGSET_T elf_fpregset_t
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#ifndef HAVE_ELF_FPREGSET_T
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/* Make sure we have said types. Not all platforms bring in <linux/elf.h>
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via <sys/procfs.h>. */
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#ifdef HAVE_LINUX_ELF_H
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#include <linux/elf.h>
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#endif
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#endif
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#include "../gdb_proc_service.h"
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#include <sys/reg.h>
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#include <sys/procfs.h>
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#include <sys/ptrace.h>
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/* This definition comes from prctl.h, but some kernels may not have it. */
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#ifndef PTRACE_ARCH_PRCTL
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#define PTRACE_ARCH_PRCTL 30
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#endif
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/* The following definitions come from prctl.h, but may be absent
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for certain configurations. */
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#ifndef ARCH_GET_FS
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#define ARCH_SET_GS 0x1001
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#define ARCH_SET_FS 0x1002
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#define ARCH_GET_FS 0x1003
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#define ARCH_GET_GS 0x1004
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#endif
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static int x86_64_regmap[] = {
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RAX * 8, RBX * 8, RCX * 8, RDX * 8,
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RSI * 8, RDI * 8, RBP * 8, RSP * 8,
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R8 * 8, R9 * 8, R10 * 8, R11 * 8,
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R12 * 8, R13 * 8, R14 * 8, R15 * 8,
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RIP * 8, EFLAGS * 8, CS * 8, SS * 8,
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DS * 8, ES * 8, FS * 8, GS * 8
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};
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#define X86_64_NUM_GREGS (sizeof(x86_64_regmap)/sizeof(int))
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/* Called by libthread_db. */
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ps_err_e
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ps_get_thread_area (const struct ps_prochandle *ph,
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lwpid_t lwpid, int idx, void **base)
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{
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switch (idx)
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{
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case FS:
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if (ptrace (PTRACE_ARCH_PRCTL, lwpid, base, ARCH_GET_FS) == 0)
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return PS_OK;
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break;
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case GS:
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if (ptrace (PTRACE_ARCH_PRCTL, lwpid, base, ARCH_GET_GS) == 0)
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return PS_OK;
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break;
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default:
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return PS_BADADDR;
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}
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return PS_ERR;
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}
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static void
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x86_64_fill_gregset (void *buf)
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{
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int i;
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for (i = 0; i < X86_64_NUM_GREGS; i++)
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collect_register (i, ((char *) buf) + x86_64_regmap[i]);
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}
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static void
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x86_64_store_gregset (const void *buf)
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{
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int i;
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for (i = 0; i < X86_64_NUM_GREGS; i++)
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supply_register (i, ((char *) buf) + x86_64_regmap[i]);
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}
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static void
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x86_64_fill_fpregset (void *buf)
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{
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i387_cache_to_fxsave (buf);
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}
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static void
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x86_64_store_fpregset (const void *buf)
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{
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i387_fxsave_to_cache (buf);
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}
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struct regset_info target_regsets[] = {
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{ PTRACE_GETREGS, PTRACE_SETREGS, sizeof (elf_gregset_t),
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GENERAL_REGS,
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x86_64_fill_gregset, x86_64_store_gregset },
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{ PTRACE_GETFPREGS, PTRACE_SETFPREGS, sizeof (elf_fpregset_t),
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FP_REGS,
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x86_64_fill_fpregset, x86_64_store_fpregset },
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{ 0, 0, -1, -1, NULL, NULL }
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};
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struct linux_target_ops the_low_target = {
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-1,
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NULL,
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NULL,
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NULL,
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};
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