/* Definitions for AMD x86-64 running Linux-based GNU systems with ELF format.
   Copyright (C) 2001, 2002, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
   Free Software Foundation, Inc.
   Contributed by Jan Hubicka <jh@suse.cz>, based on linux.h.

This file is part of GCC.

GCC 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, or (at your option)
any later version.

GCC 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.

Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.

You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
<http://www.gnu.org/licenses/>.  */

#if TARGET_64BIT_DEFAULT
#define TARGET_VERSION fprintf (stderr, " (x86-64 Linux/ELF)");
#else
#define TARGET_VERSION fprintf (stderr, " (i386 Linux/ELF)");
#endif

/* The svr4 ABI for the i386 says that records and unions are returned
   in memory.  In the 64bit compilation we will turn this flag off in
   ix86_option_override_internal, as we never do pcc_struct_return
   scheme on this target.  */
#undef DEFAULT_PCC_STRUCT_RETURN
#define DEFAULT_PCC_STRUCT_RETURN 1

/* We arrange for the whole %fs segment to map the tls area.  */
#undef TARGET_TLS_DIRECT_SEG_REFS_DEFAULT
#define TARGET_TLS_DIRECT_SEG_REFS_DEFAULT MASK_TLS_DIRECT_SEG_REFS

#if TARGET_64BIT_DEFAULT
#define SPEC_32 "m32"
#define SPEC_64 "!m32"
#else
#define SPEC_32 "!m64"
#define SPEC_64 "m64"
#endif

#undef ASM_SPEC
#define ASM_SPEC "%{" SPEC_32 ":--32} %{" SPEC_64 ":--64} \
 %{!mno-sse2avx:%{mavx:-msse2avx}} %{msse2avx:%{!mavx:-msse2avx}}"

#if TARGET_64BIT_DEFAULT
#define MULTILIB_DEFAULTS { "m64" }
#else
#define MULTILIB_DEFAULTS { "m32" }
#endif

/* Put all *tf routines in libgcc.  */
#undef LIBGCC2_HAS_TF_MODE
#define LIBGCC2_HAS_TF_MODE 1
#define LIBGCC2_TF_CEXT q
#define TF_SIZE 113

#define TARGET_ASM_FILE_END file_end_indicate_exec_stack

#define MD_UNWIND_SUPPORT "config/i386/linux-unwind.h"

/* The stack pointer needs to be moved while checking the stack.  */
#define STACK_CHECK_MOVING_SP 1

/* Static stack checking is supported by means of probes.  */
#define STACK_CHECK_STATIC_BUILTIN 1

/* This macro may be overridden in i386/k*bsd-gnu.h.  */
#define REG_NAME(reg) reg

#ifdef TARGET_LIBC_PROVIDES_SSP
/* i386 glibc provides __stack_chk_guard in %gs:0x14,
   x86_64 glibc provides it in %fs:0x28.  */
#define TARGET_THREAD_SSP_OFFSET	(TARGET_64BIT ? 0x28 : 0x14)

/* We steal the last transactional memory word.  */
#define TARGET_CAN_SPLIT_STACK
#define TARGET_THREAD_SPLIT_STACK_OFFSET (TARGET_64BIT ? 0x70 : 0x30)
#endif