214 lines
4.1 KiB
C
214 lines
4.1 KiB
C
/* GNU/FreeBSD/amd64 specific low level interface, for the remote server for GDB.
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Copyright 1995, 1996, 1998, 1999, 2000, 2001, 2002
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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 <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "server.h"
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#include "fbsd-low.h"
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#include "i387-fp.h"
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#include <sys/stddef.h>
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#include <sys/types.h>
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#include <sys/ptrace.h>
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#include <machine/reg.h>
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/* Mapping between the general-purpose registers in `struct user'
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format and GDB's register array layout. */
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static int amd64_regmap[] = {
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offsetof(struct reg, r_rax),
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offsetof(struct reg, r_rbx),
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offsetof(struct reg, r_rcx),
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offsetof(struct reg, r_rdx),
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offsetof(struct reg, r_rsi),
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offsetof(struct reg, r_rdi),
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offsetof(struct reg, r_rbp),
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offsetof(struct reg, r_rsp),
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offsetof(struct reg, r_r8),
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offsetof(struct reg, r_r9),
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offsetof(struct reg, r_r10),
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offsetof(struct reg, r_r11),
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offsetof(struct reg, r_r12),
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offsetof(struct reg, r_r13),
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offsetof(struct reg, r_r14),
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offsetof(struct reg, r_r15),
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offsetof(struct reg, r_rip),
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offsetof(struct reg, r_rflags), /* XXX 64-bit */
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offsetof(struct reg, r_cs),
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offsetof(struct reg, r_ss),
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offsetof(struct reg, r_ds),
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offsetof(struct reg, r_es),
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offsetof(struct reg, r_fs),
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offsetof(struct reg, r_gs),
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};
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#define AMD64_NUM_REGS (sizeof(amd64_regmap) / sizeof(amd64_regmap[0]))
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static const char amd64_breakpoint[] = { 0xCC };
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#define AMD64_BP_LEN 1
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extern int debug_threads;
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static int
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amd64_cannot_store_register(int regno)
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{
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return (regno >= AMD64_NUM_REGS);
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}
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static int
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amd64_cannot_fetch_register(int regno)
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{
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return (regno >= AMD64_NUM_REGS);
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}
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static void
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amd64_fill_gregset(void *buf)
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{
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int i;
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for (i = 0; i < AMD64_NUM_REGS; i++)
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collect_register(i, ((char *)buf) + amd64_regmap[i]);
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}
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static void
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amd64_store_gregset(const void *buf)
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{
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int i;
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for (i = 0; i < AMD64_NUM_REGS; i++)
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supply_register(i, ((char *)buf) + amd64_regmap[i]);
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}
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static void
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amd64_fill_fpregset(void *buf)
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{
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i387_cache_to_fsave(buf);
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}
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static void
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amd64_store_fpregset(const void *buf)
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{
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i387_fsave_to_cache(buf);
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}
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static void
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amd64_fill_fpxregset(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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amd64_store_fpxregset(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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{
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PT_GETREGS,
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PT_SETREGS,
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sizeof(struct reg),
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GENERAL_REGS,
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amd64_fill_gregset,
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amd64_store_gregset,
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},
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#ifdef HAVE_PTRACE_GETFPXREGS
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{
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PTRACE_GETFPXREGS,
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PTRACE_SETFPXREGS,
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sizeof(elf_fpxregset_t),
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EXTENDED_REGS,
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amd64_fill_fpxregset,
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amd64_store_fpxregset,
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},
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#endif
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{
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PT_GETFPREGS,
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PT_SETFPREGS,
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sizeof(struct fpreg),
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FP_REGS,
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amd64_fill_fpregset,
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amd64_store_fpregset,
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},
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{
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0,
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0,
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-1,
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-1,
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NULL,
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NULL,
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}
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};
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static CORE_ADDR
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amd64_get_pc(void)
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{
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unsigned long pc;
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collect_register_by_name("rip", &pc);
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if (debug_threads)
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fprintf(stderr, "stop pc (before any decrement) is %016lx\n", pc);
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return (pc);
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}
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static void
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amd64_set_pc(CORE_ADDR newpc)
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{
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if (debug_threads)
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fprintf(stderr, "set pc to %016lx\n", (long)newpc);
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supply_register_by_name("rip", &newpc);
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}
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static int
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amd64_breakpoint_at(CORE_ADDR pc)
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{
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unsigned char c;
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read_inferior_memory(pc, &c, 1);
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if (c == 0xCC)
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return (1);
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return (0);
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}
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struct fbsd_target_ops the_low_target = {
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AMD64_NUM_REGS,
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amd64_regmap,
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amd64_cannot_fetch_register,
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amd64_cannot_store_register,
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amd64_get_pc,
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amd64_set_pc,
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amd64_breakpoint,
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AMD64_BP_LEN,
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NULL,
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1,
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amd64_breakpoint_at,
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};
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