mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2025-02-17 13:10:12 +08:00
Biarch support for i386/amd64 gdbserver.
* Makefile.in (SFILES): Remove linux-i386-low.c, linux-x86-64-low.c. Add linux-x86-low.c. (linux-i386-low.o, linux-x86-64-low.o): Delete. (linux-x86-low.o): Add. * linux-x86-64-low.c: Delete. * linux-i386-low.c: Delete. * linux-x86-low.c: New file. * configure.srv (i?86-linux srv_tgtobj): Replace linux-i386-low.o with linux-x86-low.o. (x86_64-linux srv_tgtobj): Replace linux-x86-64-low.o with linux-x86-low.o. (x86_64-linux srv_regobj): Add reg-i386-linux.o. * linux-low.c: Include ansidecl.h, elf/common.h, elf/external.h. (linux_child_pid_to_exec_file): New function. (elf_64_header_p, elf_64_file_p): New functions. (siginfo_fixup): New function. (linux_xfer_siginfo): New local inf_siginfo. Call siginfo_fixup to give target a chance to convert layout. * linux-low.h (linux_target_ops): New member siginfo_fixup. (linux_child_pid_to_exec_file, elf_64_file_p): Declare.
This commit is contained in:
Doug Evans
parent
1b05fbbd2c
commit
d0722149ad
@ -1,3 +1,27 @@
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2009-05-12 Doug Evans <dje@google.com>
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Biarch support for i386/amd64 gdbserver.
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* Makefile.in (SFILES): Remove linux-i386-low.c, linux-x86-64-low.c.
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Add linux-x86-low.c.
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(linux-i386-low.o, linux-x86-64-low.o): Delete.
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(linux-x86-low.o): Add.
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* linux-x86-64-low.c: Delete.
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* linux-i386-low.c: Delete.
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* linux-x86-low.c: New file.
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* configure.srv (i?86-linux srv_tgtobj): Replace linux-i386-low.o with
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linux-x86-low.o.
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(x86_64-linux srv_tgtobj): Replace linux-x86-64-low.o with
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linux-x86-low.o.
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(x86_64-linux srv_regobj): Add reg-i386-linux.o.
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* linux-low.c: Include ansidecl.h, elf/common.h, elf/external.h.
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(linux_child_pid_to_exec_file): New function.
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(elf_64_header_p, elf_64_file_p): New functions.
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(siginfo_fixup): New function.
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(linux_xfer_siginfo): New local inf_siginfo. Call siginfo_fixup to
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give target a chance to convert layout.
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* linux-low.h (linux_target_ops): New member siginfo_fixup.
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(linux_child_pid_to_exec_file, elf_64_file_p): Declare.
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2009-05-07 Doug Evans <dje@google.com>
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* linux-low.c (regsets_fetch_inferior_registers): Fix memory leak.
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@ -103,7 +103,7 @@ SFILES= $(srcdir)/gdbreplay.c $(srcdir)/inferiors.c \
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$(srcdir)/remote-utils.c $(srcdir)/server.c $(srcdir)/target.c \
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$(srcdir)/thread-db.c $(srcdir)/utils.c \
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$(srcdir)/linux-arm-low.c $(srcdir)/linux-cris-low.c \
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$(srcdir)/linux-crisv32-low.c $(srcdir)/linux-i386-low.c \
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$(srcdir)/linux-crisv32-low.c \
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$(srcdir)/i387-fp.c \
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$(srcdir)/linux-ia64-low.c $(srcdir)/linux-low.c \
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$(srcdir)/linux-m32r-low.c \
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@ -111,7 +111,7 @@ SFILES= $(srcdir)/gdbreplay.c $(srcdir)/inferiors.c \
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$(srcdir)/linux-ppc-low.c \
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$(srcdir)/linux-s390-low.c \
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$(srcdir)/linux-sh-low.c $(srcdir)/linux-sparc-low.c \
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$(srcdir)/linux-x86-64-low.c \
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$(srcdir)/linux-x86-low.c \
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$(srcdir)/linux-xtensa-low.c \
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$(srcdir)/win32-arm-low.c $(srcdir)/win32-i386-low.c \
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$(srcdir)/win32-low.c $(srcdir)/wincecompat.c \
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@ -296,8 +296,6 @@ linux-arm-low.o: linux-arm-low.c $(linux_low_h) $(server_h) \
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$(gdb_proc_service_h)
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linux-cris-low.o: linux-cris-low.c $(linux_low_h) $(server_h)
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linux-crisv32-low.o: linux-crisv32-low.c $(linux_low_h) $(server_h)
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linux-i386-low.o: linux-i386-low.c $(linux_low_h) $(server_h) \
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$(gdb_proc_service_h)
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linux-ia64-low.o: linux-ia64-low.c $(linux_low_h) $(server_h)
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linux-m32r-low.o: linux-m32r-low.c $(linux_low_h) $(server_h)
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linux-mips-low.o: linux-mips-low.c $(linux_low_h) $(server_h) \
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@ -305,7 +303,7 @@ linux-mips-low.o: linux-mips-low.c $(linux_low_h) $(server_h) \
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linux-ppc-low.o: linux-ppc-low.c $(linux_low_h) $(server_h)
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linux-s390-low.o: linux-s390-low.c $(linux_low_h) $(server_h)
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linux-sh-low.o: linux-sh-low.c $(linux_low_h) $(server_h)
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linux-x86-64-low.o: linux-x86-64-low.c $(linux_low_h) $(server_h) \
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linux-x86-low.o: linux-x86-low.c $(linux_low_h) $(server_h) \
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$(gdb_proc_service_h)
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linux-xtensa-low.o: linux-xtensa-low.c xtensa-xtregs.c $(linux_low_h) $(server_h)
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@ -56,7 +56,7 @@ case "${target}" in
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srv_tgtobj="win32-low.o win32-i386-low.o"
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;;
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i[34567]86-*-linux*) srv_regobj=reg-i386-linux.o
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srv_tgtobj="linux-low.o linux-i386-low.o i387-fp.o"
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srv_tgtobj="linux-low.o linux-x86-low.o i387-fp.o"
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srv_linux_usrregs=yes
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srv_linux_regsets=yes
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srv_linux_thread_db=yes
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@ -169,8 +169,9 @@ case "${target}" in
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spu*-*-*) srv_regobj=reg-spu.o
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srv_tgtobj="spu-low.o"
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;;
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x86_64-*-linux*) srv_regobj=reg-x86-64-linux.o
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srv_tgtobj="linux-low.o linux-x86-64-low.o i387-fp.o"
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x86_64-*-linux*) srv_regobj="reg-x86-64-linux.o reg-i386-linux.o"
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srv_tgtobj="linux-low.o linux-x86-low.o i387-fp.o"
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srv_linux_usrregs=yes # This is for i386 progs.
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srv_linux_regsets=yes
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srv_linux_thread_db=yes
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;;
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@ -1,210 +0,0 @@
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/* GNU/Linux/i386 specific low level interface, for the remote server for GDB.
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Copyright (C) 1995, 1996, 1998, 1999, 2000, 2001, 2002, 2004, 2005, 2006,
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2007, 2008, 2009 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 3 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, see <http://www.gnu.org/licenses/>. */
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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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#include "gdb_proc_service.h"
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#include <sys/ptrace.h>
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#ifdef HAVE_SYS_REG_H
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#include <sys/reg.h>
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#endif
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#ifndef PTRACE_GET_THREAD_AREA
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#define PTRACE_GET_THREAD_AREA 25
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#endif
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/* Defined in auto-generated file reg-i386-linux.c. */
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void init_registers_i386_linux (void);
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/* This module only supports access to the general purpose registers. */
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#define i386_num_regs 16
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/* This stuff comes from i386-linux-nat.c. */
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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 i386_regmap[] =
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{
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EAX * 4, ECX * 4, EDX * 4, EBX * 4,
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UESP * 4, EBP * 4, ESI * 4, EDI * 4,
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EIP * 4, EFL * 4, CS * 4, SS * 4,
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DS * 4, ES * 4, FS * 4, GS * 4
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};
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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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unsigned int desc[4];
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if (ptrace (PTRACE_GET_THREAD_AREA, lwpid,
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(void *) idx, (unsigned long) &desc) < 0)
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return PS_ERR;
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*(int *)base = desc[1];
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return PS_OK;
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}
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static int
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i386_cannot_store_register (int regno)
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{
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return (regno >= i386_num_regs);
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}
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static int
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i386_cannot_fetch_register (int regno)
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{
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return (regno >= i386_num_regs);
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}
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#ifdef HAVE_PTRACE_GETREGS
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#include <sys/procfs.h>
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#include <sys/ptrace.h>
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static void
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i386_fill_gregset (void *buf)
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{
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int i;
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for (i = 0; i < i386_num_regs; i++)
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collect_register (i, ((char *) buf) + i386_regmap[i]);
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collect_register_by_name ("orig_eax", ((char *) buf) + ORIG_EAX * 4);
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}
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static void
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i386_store_gregset (const void *buf)
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{
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int i;
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for (i = 0; i < i386_num_regs; i++)
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supply_register (i, ((char *) buf) + i386_regmap[i]);
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supply_register_by_name ("orig_eax", ((char *) buf) + ORIG_EAX * 4);
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}
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static void
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i386_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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i386_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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i386_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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i386_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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#endif /* HAVE_PTRACE_GETREGS */
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struct regset_info target_regsets[] = {
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#ifdef HAVE_PTRACE_GETREGS
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{ PTRACE_GETREGS, PTRACE_SETREGS, sizeof (elf_gregset_t),
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GENERAL_REGS,
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i386_fill_gregset, i386_store_gregset },
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# ifdef HAVE_PTRACE_GETFPXREGS
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{ PTRACE_GETFPXREGS, PTRACE_SETFPXREGS, sizeof (elf_fpxregset_t),
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EXTENDED_REGS,
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i386_fill_fpxregset, i386_store_fpxregset },
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# endif
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{ PTRACE_GETFPREGS, PTRACE_SETFPREGS, sizeof (elf_fpregset_t),
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FP_REGS,
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i386_fill_fpregset, i386_store_fpregset },
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#endif /* HAVE_PTRACE_GETREGS */
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{ 0, 0, -1, -1, NULL, NULL }
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};
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static const unsigned char i386_breakpoint[] = { 0xCC };
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#define i386_breakpoint_len 1
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extern int debug_threads;
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static CORE_ADDR
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i386_get_pc ()
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{
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unsigned long pc;
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collect_register_by_name ("eip", &pc);
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if (debug_threads)
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fprintf (stderr, "stop pc (before any decrement) is %08lx\n", pc);
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return pc;
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}
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static void
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i386_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 %08lx\n", (long) newpc);
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supply_register_by_name ("eip", &newpc);
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}
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static int
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i386_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 linux_target_ops the_low_target = {
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init_registers_i386_linux,
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i386_num_regs,
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i386_regmap,
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i386_cannot_fetch_register,
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i386_cannot_store_register,
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i386_get_pc,
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i386_set_pc,
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i386_breakpoint,
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i386_breakpoint_len,
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NULL,
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1,
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i386_breakpoint_at,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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};
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@ -19,6 +19,9 @@
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#include "server.h"
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#include "linux-low.h"
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#include "ansidecl.h" /* For ATTRIBUTE_PACKED, must be bug in external.h. */
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#include "elf/common.h"
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#include "elf/external.h"
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#include <sys/wait.h>
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#include <stdio.h>
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@ -154,6 +157,68 @@ static int linux_event_pipe[2] = { -1, -1 };
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static void send_sigstop (struct inferior_list_entry *entry);
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static void wait_for_sigstop (struct inferior_list_entry *entry);
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/* Accepts an integer PID; Returns a string representing a file that
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can be opened to get info for the child process.
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Space for the result is malloc'd, caller must free. */
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char *
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linux_child_pid_to_exec_file (int pid)
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{
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char *name1, *name2;
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name1 = xmalloc (MAXPATHLEN);
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name2 = xmalloc (MAXPATHLEN);
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memset (name2, 0, MAXPATHLEN);
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sprintf (name1, "/proc/%d/exe", pid);
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if (readlink (name1, name2, MAXPATHLEN) > 0)
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{
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free (name1);
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return name2;
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}
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else
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{
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free (name2);
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return name1;
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}
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}
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/* Return non-zero if HEADER is a 64-bit ELF file. */
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static int
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elf_64_header_p (const Elf64_External_Ehdr *header)
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{
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return (header->e_ident[EI_MAG0] == ELFMAG0
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&& header->e_ident[EI_MAG1] == ELFMAG1
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&& header->e_ident[EI_MAG2] == ELFMAG2
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&& header->e_ident[EI_MAG3] == ELFMAG3
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&& header->e_ident[EI_CLASS] == ELFCLASS64);
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}
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/* Return non-zero if FILE is a 64-bit ELF file,
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zero if the file is not a 64-bit ELF file,
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and -1 if the file is not accessible or doesn't exist. */
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int
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elf_64_file_p (const char *file)
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{
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Elf64_External_Ehdr header;
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int fd;
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fd = open (file, O_RDONLY);
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if (fd < 0)
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return -1;
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if (read (fd, &header, sizeof (header)) != sizeof (header))
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{
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close (fd);
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return 0;
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}
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close (fd);
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return elf_64_header_p (&header);
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}
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static void
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delete_lwp (struct lwp_info *lwp)
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{
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@ -2458,6 +2523,8 @@ linux_test_for_tracefork (void)
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linux_supports_tracefork_flag = 0;
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return;
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/* Use CLONE_VM instead of fork, to support uClinux (no MMU). */
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#ifdef __ia64__
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child_pid = __clone2 (linux_tracefork_child, stack, STACK_SIZE,
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@ -2786,12 +2853,35 @@ linux_qxfer_osdata (const char *annex,
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return len;
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}
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/* Convert a native/host siginfo object, into/from the siginfo in the
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layout of the inferiors' architecture. */
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static void
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siginfo_fixup (struct siginfo *siginfo, void *inf_siginfo, int direction)
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{
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int done = 0;
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if (the_low_target.siginfo_fixup != NULL)
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done = the_low_target.siginfo_fixup (siginfo, inf_siginfo, direction);
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/* If there was no callback, or the callback didn't do anything,
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then just do a straight memcpy. */
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if (!done)
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{
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if (direction == 1)
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memcpy (siginfo, inf_siginfo, sizeof (struct siginfo));
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else
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memcpy (inf_siginfo, siginfo, sizeof (struct siginfo));
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}
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}
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static int
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linux_xfer_siginfo (const char *annex, unsigned char *readbuf,
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unsigned const char *writebuf, CORE_ADDR offset, int len)
|
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{
|
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int pid;
|
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struct siginfo siginfo;
|
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long pid = -1;
|
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char inf_siginfo[sizeof (struct siginfo)];
|
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|
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if (current_inferior == NULL)
|
||||
return -1;
|
||||
@ -2799,7 +2889,7 @@ linux_xfer_siginfo (const char *annex, unsigned char *readbuf,
|
||||
pid = lwpid_of (get_thread_lwp (current_inferior));
|
||||
|
||||
if (debug_threads)
|
||||
fprintf (stderr, "%s siginfo for lwp %ld.\n",
|
||||
fprintf (stderr, "%s siginfo for lwp %d.\n",
|
||||
readbuf != NULL ? "Reading" : "Writing",
|
||||
pid);
|
||||
|
||||
@ -2809,14 +2899,24 @@ linux_xfer_siginfo (const char *annex, unsigned char *readbuf,
|
||||
if (ptrace (PTRACE_GETSIGINFO, pid, 0, &siginfo) != 0)
|
||||
return -1;
|
||||
|
||||
/* When GDBSERVER is built as a 64-bit application, ptrace writes into
|
||||
SIGINFO an object with 64-bit layout. Since debugging a 32-bit
|
||||
inferior with a 64-bit GDBSERVER should look the same as debugging it
|
||||
with a 32-bit GDBSERVER, we need to convert it. */
|
||||
siginfo_fixup (&siginfo, inf_siginfo, 0);
|
||||
|
||||
if (offset + len > sizeof (siginfo))
|
||||
len = sizeof (siginfo) - offset;
|
||||
|
||||
if (readbuf != NULL)
|
||||
memcpy (readbuf, (char *) &siginfo + offset, len);
|
||||
memcpy (readbuf, inf_siginfo + offset, len);
|
||||
else
|
||||
{
|
||||
memcpy ((char *) &siginfo + offset, writebuf, len);
|
||||
memcpy (inf_siginfo + offset, writebuf, len);
|
||||
|
||||
/* Convert back to ptrace layout before flushing it out. */
|
||||
siginfo_fixup (&siginfo, inf_siginfo, 1);
|
||||
|
||||
if (ptrace (PTRACE_SETSIGINFO, pid, 0, &siginfo) != 0)
|
||||
return -1;
|
||||
}
|
||||
|
||||
@ -43,6 +43,8 @@ struct regset_info
|
||||
extern struct regset_info target_regsets[];
|
||||
#endif
|
||||
|
||||
struct siginfo;
|
||||
|
||||
struct process_info_private
|
||||
{
|
||||
/* True if this process has loaded thread_db, and it is active. */
|
||||
@ -75,7 +77,6 @@ struct linux_target_ops
|
||||
int breakpoint_len;
|
||||
CORE_ADDR (*breakpoint_reinsert_addr) (void);
|
||||
|
||||
|
||||
int decr_pc_after_break;
|
||||
int (*breakpoint_at) (CORE_ADDR pc);
|
||||
|
||||
@ -89,6 +90,12 @@ struct linux_target_ops
|
||||
for registers smaller than an xfer unit). */
|
||||
void (*collect_ptrace_register) (int regno, char *buf);
|
||||
void (*supply_ptrace_register) (int regno, const char *buf);
|
||||
|
||||
/* Hook to convert from target format to ptrace format and back.
|
||||
Returns true if any conversion was done; false otherwise.
|
||||
If DIRECTION is 1, then copy from INF to NATIVE.
|
||||
If DIRECTION is 0, copy from NATIVE to INF. */
|
||||
int (*siginfo_fixup) (struct siginfo *native, void *inf, int direction);
|
||||
};
|
||||
|
||||
extern struct linux_target_ops the_low_target;
|
||||
@ -169,6 +176,9 @@ struct lwp_info
|
||||
|
||||
extern struct inferior_list all_lwps;
|
||||
|
||||
char *linux_child_pid_to_exec_file (int pid);
|
||||
int elf_64_file_p (const char *file);
|
||||
|
||||
void linux_attach_lwp (unsigned long pid);
|
||||
|
||||
int thread_db_init (int use_events);
|
||||
|
||||
@ -1,184 +0,0 @@
|
||||
/* GNU/Linux/x86-64 specific low level interface, for the remote server
|
||||
for GDB.
|
||||
Copyright (C) 2002, 2004, 2005, 2006, 2007, 2008, 2009
|
||||
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 3 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, see <http://www.gnu.org/licenses/>. */
|
||||
|
||||
#include "server.h"
|
||||
#include "linux-low.h"
|
||||
#include "i387-fp.h"
|
||||
|
||||
#include "gdb_proc_service.h"
|
||||
|
||||
/* Defined in auto-generated file reg-x86-64-linux.c. */
|
||||
void init_registers_x86_64_linux (void);
|
||||
|
||||
#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,
|
||||
-1, -1, -1, -1, -1, -1, -1, -1,
|
||||
-1, -1, -1, -1, -1, -1, -1, -1,
|
||||
-1, -1, -1, -1, -1, -1, -1, -1,
|
||||
-1, -1, -1, -1, -1, -1, -1, -1, -1,
|
||||
ORIG_RAX * 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++)
|
||||
if (x86_64_regmap[i] != -1)
|
||||
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++)
|
||||
if (x86_64_regmap[i] != -1)
|
||||
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 = {
|
||||
init_registers_x86_64_linux,
|
||||
-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,
|
||||
NULL,
|
||||
NULL,
|
||||
NULL,
|
||||
NULL,
|
||||
NULL,
|
||||
NULL,
|
||||
};
|
||||
644
gdb/gdbserver/linux-x86-low.c
Normal file
644
gdb/gdbserver/linux-x86-low.c
Normal file
@ -0,0 +1,644 @@
|
||||
/* GNU/Linux/x86-64 specific low level interface, for the remote server
|
||||
for GDB.
|
||||
Copyright (C) 2002, 2004, 2005, 2006, 2007, 2008, 2009
|
||||
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 3 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, see <http://www.gnu.org/licenses/>. */
|
||||
|
||||
#include <assert.h>
|
||||
#include <signal.h>
|
||||
#include "server.h"
|
||||
#include "linux-low.h"
|
||||
#include "i387-fp.h"
|
||||
|
||||
#include "gdb_proc_service.h"
|
||||
|
||||
/* NOTE: gdb_proc_service.h may include linux/elf.h.
|
||||
We need Elf32_Phdr. If we don't get linux/elf.h we could include
|
||||
elf.h like linux-ppc-low.c does. */
|
||||
|
||||
/* Defined in auto-generated file reg-i386-linux.c. */
|
||||
void init_registers_i386_linux (void);
|
||||
/* Defined in auto-generated file reg-x86-64-linux.c. */
|
||||
void init_registers_x86_64_linux (void);
|
||||
|
||||
#include <sys/reg.h>
|
||||
#include <sys/procfs.h>
|
||||
#include <sys/ptrace.h>
|
||||
|
||||
#ifndef PTRACE_GET_THREAD_AREA
|
||||
#define PTRACE_GET_THREAD_AREA 25
|
||||
#endif
|
||||
|
||||
/* 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
|
||||
|
||||
#ifdef __x86_64__
|
||||
|
||||
/* Mapping between the general-purpose registers in `struct user'
|
||||
format and GDB's register array layout.
|
||||
Note that the transfer layout uses 64-bit regs. */
|
||||
static /*const*/ int i386_regmap[] =
|
||||
{
|
||||
RAX * 8, RCX * 8, RDX * 8, RBX * 8,
|
||||
RSP * 8, RBP * 8, RSI * 8, RDI * 8,
|
||||
RIP * 8, EFLAGS * 8, CS * 8, SS * 8,
|
||||
DS * 8, ES * 8, FS * 8, GS * 8
|
||||
};
|
||||
|
||||
#define I386_NUM_REGS (sizeof (i386_regmap) / sizeof (i386_regmap[0]))
|
||||
|
||||
/* So code below doesn't have to care, i386 or amd64. */
|
||||
#define ORIG_EAX ORIG_RAX
|
||||
|
||||
static const 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,
|
||||
-1, -1, -1, -1, -1, -1, -1, -1,
|
||||
-1, -1, -1, -1, -1, -1, -1, -1,
|
||||
-1, -1, -1, -1, -1, -1, -1, -1,
|
||||
-1, -1, -1, -1, -1, -1, -1, -1, -1,
|
||||
ORIG_RAX * 8
|
||||
};
|
||||
|
||||
#define X86_64_NUM_REGS (sizeof (x86_64_regmap) / sizeof (x86_64_regmap[0]))
|
||||
|
||||
#else /* ! __x86_64__ */
|
||||
|
||||
/* Mapping between the general-purpose registers in `struct user'
|
||||
format and GDB's register array layout. */
|
||||
static /*const*/ int i386_regmap[] =
|
||||
{
|
||||
EAX * 4, ECX * 4, EDX * 4, EBX * 4,
|
||||
UESP * 4, EBP * 4, ESI * 4, EDI * 4,
|
||||
EIP * 4, EFL * 4, CS * 4, SS * 4,
|
||||
DS * 4, ES * 4, FS * 4, GS * 4
|
||||
};
|
||||
|
||||
#define I386_NUM_REGS (sizeof (i386_regmap) / sizeof (i386_regmap[0]))
|
||||
|
||||
#endif
|
||||
|
||||
/* Called by libthread_db. */
|
||||
|
||||
ps_err_e
|
||||
ps_get_thread_area (const struct ps_prochandle *ph,
|
||||
lwpid_t lwpid, int idx, void **base)
|
||||
{
|
||||
#ifdef __x86_64__
|
||||
int use_64bit = register_size (0) == 8;
|
||||
|
||||
if (use_64bit)
|
||||
{
|
||||
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;
|
||||
}
|
||||
#endif
|
||||
|
||||
{
|
||||
unsigned int desc[4];
|
||||
|
||||
if (ptrace (PTRACE_GET_THREAD_AREA, lwpid,
|
||||
(void *) (intptr_t) idx, (unsigned long) &desc) < 0)
|
||||
return PS_ERR;
|
||||
|
||||
*(int *)base = desc[1];
|
||||
return PS_OK;
|
||||
}
|
||||
}
|
||||
|
||||
static int
|
||||
i386_cannot_store_register (int regno)
|
||||
{
|
||||
return regno >= I386_NUM_REGS;
|
||||
}
|
||||
|
||||
static int
|
||||
i386_cannot_fetch_register (int regno)
|
||||
{
|
||||
return regno >= I386_NUM_REGS;
|
||||
}
|
||||
|
||||
static void
|
||||
x86_fill_gregset (void *buf)
|
||||
{
|
||||
int i;
|
||||
|
||||
#ifdef __x86_64__
|
||||
if (register_size (0) == 8)
|
||||
{
|
||||
for (i = 0; i < X86_64_NUM_REGS; i++)
|
||||
if (x86_64_regmap[i] != -1)
|
||||
collect_register (i, ((char *) buf) + x86_64_regmap[i]);
|
||||
return;
|
||||
}
|
||||
#endif
|
||||
|
||||
for (i = 0; i < I386_NUM_REGS; i++)
|
||||
collect_register (i, ((char *) buf) + i386_regmap[i]);
|
||||
|
||||
collect_register_by_name ("orig_eax", ((char *) buf) + ORIG_EAX * 4);
|
||||
}
|
||||
|
||||
static void
|
||||
x86_store_gregset (const void *buf)
|
||||
{
|
||||
int i;
|
||||
|
||||
#ifdef __x86_64__
|
||||
if (register_size (0) == 8)
|
||||
{
|
||||
for (i = 0; i < X86_64_NUM_REGS; i++)
|
||||
if (x86_64_regmap[i] != -1)
|
||||
supply_register (i, ((char *) buf) + x86_64_regmap[i]);
|
||||
return;
|
||||
}
|
||||
#endif
|
||||
|
||||
for (i = 0; i < I386_NUM_REGS; i++)
|
||||
supply_register (i, ((char *) buf) + i386_regmap[i]);
|
||||
|
||||
supply_register_by_name ("orig_eax", ((char *) buf) + ORIG_EAX * 4);
|
||||
}
|
||||
|
||||
static void
|
||||
x86_fill_fpregset (void *buf)
|
||||
{
|
||||
#ifdef __x86_64__
|
||||
i387_cache_to_fxsave (buf);
|
||||
#else
|
||||
i387_cache_to_fsave (buf);
|
||||
#endif
|
||||
}
|
||||
|
||||
static void
|
||||
x86_store_fpregset (const void *buf)
|
||||
{
|
||||
#ifdef __x86_64__
|
||||
i387_fxsave_to_cache (buf);
|
||||
#else
|
||||
i387_fsave_to_cache (buf);
|
||||
#endif
|
||||
}
|
||||
|
||||
#ifndef __x86_64__
|
||||
|
||||
static void
|
||||
x86_fill_fpxregset (void *buf)
|
||||
{
|
||||
i387_cache_to_fxsave (buf);
|
||||
}
|
||||
|
||||
static void
|
||||
x86_store_fpxregset (const void *buf)
|
||||
{
|
||||
i387_fxsave_to_cache (buf);
|
||||
}
|
||||
|
||||
#endif
|
||||
|
||||
/* ??? The non-biarch i386 case stores all the i387 regs twice.
|
||||
Once in i387_.*fsave.* and once in i387_.*fxsave.*.
|
||||
This is, presumably, to handle the case where PTRACE_[GS]ETFPXREGS
|
||||
doesn't work. IWBN to avoid the duplication in the case where it
|
||||
does work. Maybe the arch_setup routine could check whether it works
|
||||
and update target_regsets accordingly, maybe by moving target_regsets
|
||||
to linux_target_ops and set the right one there, rather than having to
|
||||
modify the target_regsets global. */
|
||||
|
||||
struct regset_info target_regsets[] =
|
||||
{
|
||||
#ifdef HAVE_PTRACE_GETREGS
|
||||
{ PTRACE_GETREGS, PTRACE_SETREGS, sizeof (elf_gregset_t),
|
||||
GENERAL_REGS,
|
||||
x86_fill_gregset, x86_store_gregset },
|
||||
# ifndef __x86_64__
|
||||
# ifdef HAVE_PTRACE_GETFPXREGS
|
||||
{ PTRACE_GETFPXREGS, PTRACE_SETFPXREGS, sizeof (elf_fpxregset_t),
|
||||
EXTENDED_REGS,
|
||||
x86_fill_fpxregset, x86_store_fpxregset },
|
||||
# endif
|
||||
# endif
|
||||
{ PTRACE_GETFPREGS, PTRACE_SETFPREGS, sizeof (elf_fpregset_t),
|
||||
FP_REGS,
|
||||
x86_fill_fpregset, x86_store_fpregset },
|
||||
#endif /* HAVE_PTRACE_GETREGS */
|
||||
{ 0, 0, -1, -1, NULL, NULL }
|
||||
};
|
||||
|
||||
static CORE_ADDR
|
||||
x86_get_pc (void)
|
||||
{
|
||||
int use_64bit = register_size (0) == 8;
|
||||
|
||||
if (use_64bit)
|
||||
{
|
||||
unsigned long pc;
|
||||
collect_register_by_name ("rip", &pc);
|
||||
return (CORE_ADDR) pc;
|
||||
}
|
||||
else
|
||||
{
|
||||
unsigned int pc;
|
||||
collect_register_by_name ("eip", &pc);
|
||||
return (CORE_ADDR) pc;
|
||||
}
|
||||
}
|
||||
|
||||
static void
|
||||
x86_set_pc (CORE_ADDR pc)
|
||||
{
|
||||
int use_64bit = register_size (0) == 8;
|
||||
|
||||
if (use_64bit)
|
||||
{
|
||||
unsigned long newpc = pc;
|
||||
supply_register_by_name ("rip", &newpc);
|
||||
}
|
||||
else
|
||||
{
|
||||
unsigned int newpc = pc;
|
||||
supply_register_by_name ("eip", &newpc);
|
||||
}
|
||||
}
|
||||
|
||||
static const unsigned char x86_breakpoint[] = { 0xCC };
|
||||
#define x86_breakpoint_len 1
|
||||
|
||||
static int
|
||||
x86_breakpoint_at (CORE_ADDR pc)
|
||||
{
|
||||
unsigned char c;
|
||||
|
||||
read_inferior_memory (pc, &c, 1);
|
||||
if (c == 0xCC)
|
||||
return 1;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* When GDBSERVER is built as a 64-bit application on linux, the
|
||||
PTRACE_GETSIGINFO data is always presented in 64-bit layout. Since
|
||||
debugging a 32-bit inferior with a 64-bit GDBSERVER should look the same
|
||||
as debugging it with a 32-bit GDBSERVER, we do the 32-bit <-> 64-bit
|
||||
conversion in-place ourselves. */
|
||||
|
||||
/* These types below (compat_*) define a siginfo type that is layout
|
||||
compatible with the siginfo type exported by the 32-bit userspace
|
||||
support. */
|
||||
|
||||
#ifdef __x86_64__
|
||||
|
||||
typedef int compat_int_t;
|
||||
typedef unsigned int compat_uptr_t;
|
||||
|
||||
typedef int compat_time_t;
|
||||
typedef int compat_timer_t;
|
||||
typedef int compat_clock_t;
|
||||
|
||||
struct compat_timeval
|
||||
{
|
||||
compat_time_t tv_sec;
|
||||
int tv_usec;
|
||||
};
|
||||
|
||||
typedef union compat_sigval
|
||||
{
|
||||
compat_int_t sival_int;
|
||||
compat_uptr_t sival_ptr;
|
||||
} compat_sigval_t;
|
||||
|
||||
typedef struct compat_siginfo
|
||||
{
|
||||
int si_signo;
|
||||
int si_errno;
|
||||
int si_code;
|
||||
|
||||
union
|
||||
{
|
||||
int _pad[((128 / sizeof (int)) - 3)];
|
||||
|
||||
/* kill() */
|
||||
struct
|
||||
{
|
||||
unsigned int _pid;
|
||||
unsigned int _uid;
|
||||
} _kill;
|
||||
|
||||
/* POSIX.1b timers */
|
||||
struct
|
||||
{
|
||||
compat_timer_t _tid;
|
||||
int _overrun;
|
||||
compat_sigval_t _sigval;
|
||||
} _timer;
|
||||
|
||||
/* POSIX.1b signals */
|
||||
struct
|
||||
{
|
||||
unsigned int _pid;
|
||||
unsigned int _uid;
|
||||
compat_sigval_t _sigval;
|
||||
} _rt;
|
||||
|
||||
/* SIGCHLD */
|
||||
struct
|
||||
{
|
||||
unsigned int _pid;
|
||||
unsigned int _uid;
|
||||
int _status;
|
||||
compat_clock_t _utime;
|
||||
compat_clock_t _stime;
|
||||
} _sigchld;
|
||||
|
||||
/* SIGILL, SIGFPE, SIGSEGV, SIGBUS */
|
||||
struct
|
||||
{
|
||||
unsigned int _addr;
|
||||
} _sigfault;
|
||||
|
||||
/* SIGPOLL */
|
||||
struct
|
||||
{
|
||||
int _band;
|
||||
int _fd;
|
||||
} _sigpoll;
|
||||
} _sifields;
|
||||
} compat_siginfo_t;
|
||||
|
||||
#define cpt_si_pid _sifields._kill._pid
|
||||
#define cpt_si_uid _sifields._kill._uid
|
||||
#define cpt_si_timerid _sifields._timer._tid
|
||||
#define cpt_si_overrun _sifields._timer._overrun
|
||||
#define cpt_si_status _sifields._sigchld._status
|
||||
#define cpt_si_utime _sifields._sigchld._utime
|
||||
#define cpt_si_stime _sifields._sigchld._stime
|
||||
#define cpt_si_ptr _sifields._rt._sigval.sival_ptr
|
||||
#define cpt_si_addr _sifields._sigfault._addr
|
||||
#define cpt_si_band _sifields._sigpoll._band
|
||||
#define cpt_si_fd _sifields._sigpoll._fd
|
||||
|
||||
/* glibc at least up to 2.3.2 doesn't have si_timerid, si_overrun.
|
||||
In their place is si_timer1,si_timer2. */
|
||||
#ifndef si_timerid
|
||||
#define si_timerid si_timer1
|
||||
#endif
|
||||
#ifndef si_overrun
|
||||
#define si_overrun si_timer2
|
||||
#endif
|
||||
|
||||
static void
|
||||
compat_siginfo_from_siginfo (compat_siginfo_t *to, siginfo_t *from)
|
||||
{
|
||||
memset (to, 0, sizeof (*to));
|
||||
|
||||
to->si_signo = from->si_signo;
|
||||
to->si_errno = from->si_errno;
|
||||
to->si_code = from->si_code;
|
||||
|
||||
if (to->si_code < 0)
|
||||
{
|
||||
to->cpt_si_ptr = (intptr_t) from->si_ptr;
|
||||
}
|
||||
else if (to->si_code == SI_USER)
|
||||
{
|
||||
to->cpt_si_pid = from->si_pid;
|
||||
to->cpt_si_uid = from->si_uid;
|
||||
}
|
||||
else if (to->si_code == SI_TIMER)
|
||||
{
|
||||
to->cpt_si_timerid = from->si_timerid;
|
||||
to->cpt_si_overrun = from->si_overrun;
|
||||
to->cpt_si_ptr = (intptr_t) from->si_ptr;
|
||||
}
|
||||
else
|
||||
{
|
||||
switch (to->si_signo)
|
||||
{
|
||||
case SIGCHLD:
|
||||
to->cpt_si_pid = from->si_pid;
|
||||
to->cpt_si_uid = from->si_uid;
|
||||
to->cpt_si_status = from->si_status;
|
||||
to->cpt_si_utime = from->si_utime;
|
||||
to->cpt_si_stime = from->si_stime;
|
||||
break;
|
||||
case SIGILL:
|
||||
case SIGFPE:
|
||||
case SIGSEGV:
|
||||
case SIGBUS:
|
||||
to->cpt_si_addr = (intptr_t) from->si_addr;
|
||||
break;
|
||||
case SIGPOLL:
|
||||
to->cpt_si_band = from->si_band;
|
||||
to->cpt_si_fd = from->si_fd;
|
||||
break;
|
||||
default:
|
||||
to->cpt_si_pid = from->si_pid;
|
||||
to->cpt_si_uid = from->si_uid;
|
||||
to->cpt_si_ptr = (intptr_t) from->si_ptr;
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
static void
|
||||
siginfo_from_compat_siginfo (siginfo_t *to, compat_siginfo_t *from)
|
||||
{
|
||||
memset (to, 0, sizeof (*to));
|
||||
|
||||
to->si_signo = from->si_signo;
|
||||
to->si_errno = from->si_errno;
|
||||
to->si_code = from->si_code;
|
||||
|
||||
if (to->si_code < 0)
|
||||
{
|
||||
to->si_ptr = (void *) (intptr_t) from->cpt_si_ptr;
|
||||
}
|
||||
else if (to->si_code == SI_USER)
|
||||
{
|
||||
to->si_pid = from->cpt_si_pid;
|
||||
to->si_uid = from->cpt_si_uid;
|
||||
}
|
||||
else if (to->si_code == SI_TIMER)
|
||||
{
|
||||
to->si_timerid = from->cpt_si_timerid;
|
||||
to->si_overrun = from->cpt_si_overrun;
|
||||
to->si_ptr = (void *) (intptr_t) from->cpt_si_ptr;
|
||||
}
|
||||
else
|
||||
{
|
||||
switch (to->si_signo)
|
||||
{
|
||||
case SIGCHLD:
|
||||
to->si_pid = from->cpt_si_pid;
|
||||
to->si_uid = from->cpt_si_uid;
|
||||
to->si_status = from->cpt_si_status;
|
||||
to->si_utime = from->cpt_si_utime;
|
||||
to->si_stime = from->cpt_si_stime;
|
||||
break;
|
||||
case SIGILL:
|
||||
case SIGFPE:
|
||||
case SIGSEGV:
|
||||
case SIGBUS:
|
||||
to->si_addr = (void *) (intptr_t) from->cpt_si_addr;
|
||||
break;
|
||||
case SIGPOLL:
|
||||
to->si_band = from->cpt_si_band;
|
||||
to->si_fd = from->cpt_si_fd;
|
||||
break;
|
||||
default:
|
||||
to->si_pid = from->cpt_si_pid;
|
||||
to->si_uid = from->cpt_si_uid;
|
||||
to->si_ptr = (void* ) (intptr_t) from->cpt_si_ptr;
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
#endif /* __x86_64__ */
|
||||
|
||||
/* Convert a native/host siginfo object, into/from the siginfo in the
|
||||
layout of the inferiors' architecture. Returns true if any
|
||||
conversion was done; false otherwise. If DIRECTION is 1, then copy
|
||||
from INF to NATIVE. If DIRECTION is 0, copy from NATIVE to
|
||||
INF. */
|
||||
|
||||
static int
|
||||
x86_siginfo_fixup (struct siginfo *native, void *inf, int direction)
|
||||
{
|
||||
#ifdef __x86_64__
|
||||
/* Is the inferior 32-bit? If so, then fixup the siginfo object. */
|
||||
if (register_size (0) == 4)
|
||||
{
|
||||
assert (sizeof (struct siginfo) == sizeof (compat_siginfo_t));
|
||||
|
||||
if (direction == 0)
|
||||
compat_siginfo_from_siginfo ((struct compat_siginfo *) inf, native);
|
||||
else
|
||||
siginfo_from_compat_siginfo (native, (struct compat_siginfo *) inf);
|
||||
|
||||
return 1;
|
||||
}
|
||||
#endif
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* Return non-zero if the target is 64-bit. */
|
||||
|
||||
static void
|
||||
x86_arch_setup (void)
|
||||
{
|
||||
#ifdef __x86_64__
|
||||
int pid = pid_of (get_thread_lwp (current_inferior));
|
||||
char *file = linux_child_pid_to_exec_file (pid);
|
||||
int use_64bit = elf_64_file_p (file);
|
||||
|
||||
free (file);
|
||||
|
||||
if (use_64bit < 0)
|
||||
{
|
||||
/* This can only happen if /proc/<pid>/exe is unreadable,
|
||||
but "that can't happen" if we've gotten this far.
|
||||
Fall through and assume this is a 32-bit program. */
|
||||
}
|
||||
else if (use_64bit)
|
||||
{
|
||||
init_registers_x86_64_linux ();
|
||||
|
||||
/* Amd64 doesn't have HAVE_LINUX_USRREGS. */
|
||||
the_low_target.num_regs = -1;
|
||||
the_low_target.regmap = NULL;
|
||||
the_low_target.cannot_fetch_register = NULL;
|
||||
the_low_target.cannot_store_register = NULL;
|
||||
|
||||
/* Amd64 has 16 xmm regs. */
|
||||
num_xmm_registers = 16;
|
||||
|
||||
return;
|
||||
}
|
||||
#endif
|
||||
|
||||
/* Ok we have a 32-bit inferior. */
|
||||
|
||||
init_registers_i386_linux ();
|
||||
|
||||
the_low_target.num_regs = I386_NUM_REGS;
|
||||
the_low_target.regmap = i386_regmap;
|
||||
the_low_target.cannot_fetch_register = i386_cannot_fetch_register;
|
||||
the_low_target.cannot_store_register = i386_cannot_store_register;
|
||||
|
||||
/* I386 has 8 xmm regs. */
|
||||
num_xmm_registers = 8;
|
||||
}
|
||||
|
||||
/* This is initialized assuming an amd64 target.
|
||||
x86_arch_setup will correct it for i386 or amd64 targets. */
|
||||
|
||||
struct linux_target_ops the_low_target =
|
||||
{
|
||||
x86_arch_setup,
|
||||
-1,
|
||||
NULL,
|
||||
NULL,
|
||||
NULL,
|
||||
x86_get_pc,
|
||||
x86_set_pc,
|
||||
x86_breakpoint,
|
||||
x86_breakpoint_len,
|
||||
NULL,
|
||||
1,
|
||||
x86_breakpoint_at,
|
||||
NULL,
|
||||
NULL,
|
||||
NULL,
|
||||
NULL,
|
||||
/* collect_ptrace_register/supply_ptrace_register are not needed in the
|
||||
native i386 case (no registers smaller than an xfer unit), and are not
|
||||
used in the biarch case (HAVE_LINUX_USRREGS is not defined). */
|
||||
NULL,
|
||||
NULL,
|
||||
/* need to fix up i386 siginfo if host is amd64 */
|
||||
x86_siginfo_fixup,
|
||||
};
|
||||
Loading…
Reference in New Issue
Block a user