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/* Definitions for AMD x86-64 running Linux-based GNU systems with ELF format.

   Copyright (C) 2001, 2002, 2004, 2005, 2006, 2007, 2008, 2009, 2010

   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

#define TARGET_OS_CPP_BUILTINS()                                \

  do                                                            \

    {                                                           \

        LINUX_TARGET_OS_CPP_BUILTINS();                         \

    }                                                           \

  while (0)

#undef CPP_SPEC

#define CPP_SPEC "%{posix:-D_POSIX_SOURCE} %{pthread:-D_REENTRANT}"

/* 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

   override_options, 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

/* Provide a LINK_SPEC.  Here we provide support for the special GCC

   options -static and -shared, which allow us to link things in one

   of these three modes by applying the appropriate combinations of

   options at link-time.

   When the -shared link option is used a final link is not being

   done.  */

#define GLIBC_DYNAMIC_LINKER32 "/lib/ld-linux.so.2"

#define GLIBC_DYNAMIC_LINKER64 "/lib64/ld-linux-x86-64.so.2"

#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 "%{v:-V} %{Qy:} %{!Qn:-Qy} %{n} %{T} %{Ym,*} %{Yd,*} \

 %{Wa,*:%*} %{" SPEC_32 ":--32} %{" SPEC_64 ":--64} \

 %{!mno-sse2avx:%{mavx:-msse2avx}} %{msse2avx:%{!mavx:-msse2avx}}"

#undef  LINK_SPEC

#define LINK_SPEC "%{" SPEC_64 ":-m elf_x86_64} %{" SPEC_32 ":-m elf_i386} \

  %{shared:-shared} \

  %{!shared: \

    %{!static: \

      %{rdynamic:-export-dynamic} \

      %{" SPEC_32 ":%{!dynamic-linker:-dynamic-linker " LINUX_DYNAMIC_LINKER32 "}} \

      %{" SPEC_64 ":%{!dynamic-linker:-dynamic-linker " LINUX_DYNAMIC_LINKER64 "}}} \

    %{static:-static}}"

/* Similar to standard Linux, but adding -ffast-math support.  */

#undef  ENDFILE_SPEC

#define ENDFILE_SPEC \

  "%{ffast-math|funsafe-math-optimizations:crtfastmath.o%s} \

   %{mpc32:crtprec32.o%s} \

   %{mpc64:crtprec64.o%s} \

   %{mpc80:crtprec80.o%s} \

   %{shared|pie:crtendS.o%s;:crtend.o%s} crtn.o%s"

#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

/* 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)

#endif