linux64.h revision 1.1
1/* Definitions for AMD x86-64 running Linux-based GNU systems with ELF format. 2 Copyright (C) 2001, 2002, 2004, 2005, 2006, 2007, 2008, 2009, 2010 3 Free Software Foundation, Inc. 4 Contributed by Jan Hubicka <jh@suse.cz>, based on linux.h. 5 6This file is part of GCC. 7 8GCC is free software; you can redistribute it and/or modify 9it under the terms of the GNU General Public License as published by 10the Free Software Foundation; either version 3, or (at your option) 11any later version. 12 13GCC is distributed in the hope that it will be useful, 14but WITHOUT ANY WARRANTY; without even the implied warranty of 15MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16GNU General Public License for more details. 17 18Under Section 7 of GPL version 3, you are granted additional 19permissions described in the GCC Runtime Library Exception, version 203.1, as published by the Free Software Foundation. 21 22You should have received a copy of the GNU General Public License and 23a copy of the GCC Runtime Library Exception along with this program; 24see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 25<http://www.gnu.org/licenses/>. */ 26 27#if TARGET_64BIT_DEFAULT 28#define TARGET_VERSION fprintf (stderr, " (x86-64 Linux/ELF)"); 29#else 30#define TARGET_VERSION fprintf (stderr, " (i386 Linux/ELF)"); 31#endif 32 33#define TARGET_OS_CPP_BUILTINS() \ 34 do \ 35 { \ 36 LINUX_TARGET_OS_CPP_BUILTINS(); \ 37 } \ 38 while (0) 39 40#undef CPP_SPEC 41#define CPP_SPEC "%{posix:-D_POSIX_SOURCE} %{pthread:-D_REENTRANT}" 42 43/* The svr4 ABI for the i386 says that records and unions are returned 44 in memory. In the 64bit compilation we will turn this flag off in 45 override_options, as we never do pcc_struct_return scheme on this target. */ 46#undef DEFAULT_PCC_STRUCT_RETURN 47#define DEFAULT_PCC_STRUCT_RETURN 1 48 49/* We arrange for the whole %fs segment to map the tls area. */ 50#undef TARGET_TLS_DIRECT_SEG_REFS_DEFAULT 51#define TARGET_TLS_DIRECT_SEG_REFS_DEFAULT MASK_TLS_DIRECT_SEG_REFS 52 53/* Provide a LINK_SPEC. Here we provide support for the special GCC 54 options -static and -shared, which allow us to link things in one 55 of these three modes by applying the appropriate combinations of 56 options at link-time. 57 58 When the -shared link option is used a final link is not being 59 done. */ 60 61#define GLIBC_DYNAMIC_LINKER32 "/lib/ld-linux.so.2" 62#define GLIBC_DYNAMIC_LINKER64 "/lib64/ld-linux-x86-64.so.2" 63 64#if TARGET_64BIT_DEFAULT 65#define SPEC_32 "m32" 66#define SPEC_64 "!m32" 67#else 68#define SPEC_32 "!m64" 69#define SPEC_64 "m64" 70#endif 71 72#undef ASM_SPEC 73#define ASM_SPEC "%{v:-V} %{Qy:} %{!Qn:-Qy} %{n} %{T} %{Ym,*} %{Yd,*} \ 74 %{Wa,*:%*} %{" SPEC_32 ":--32} %{" SPEC_64 ":--64} \ 75 %{!mno-sse2avx:%{mavx:-msse2avx}} %{msse2avx:%{!mavx:-msse2avx}}" 76 77#undef LINK_SPEC 78#define LINK_SPEC "%{" SPEC_64 ":-m elf_x86_64} %{" SPEC_32 ":-m elf_i386} \ 79 %{shared:-shared} \ 80 %{!shared: \ 81 %{!static: \ 82 %{rdynamic:-export-dynamic} \ 83 %{" SPEC_32 ":%{!dynamic-linker:-dynamic-linker " LINUX_DYNAMIC_LINKER32 "}} \ 84 %{" SPEC_64 ":%{!dynamic-linker:-dynamic-linker " LINUX_DYNAMIC_LINKER64 "}}} \ 85 %{static:-static}}" 86 87/* Similar to standard Linux, but adding -ffast-math support. */ 88#undef ENDFILE_SPEC 89#define ENDFILE_SPEC \ 90 "%{ffast-math|funsafe-math-optimizations:crtfastmath.o%s} \ 91 %{mpc32:crtprec32.o%s} \ 92 %{mpc64:crtprec64.o%s} \ 93 %{mpc80:crtprec80.o%s} \ 94 %{shared|pie:crtendS.o%s;:crtend.o%s} crtn.o%s" 95 96#if TARGET_64BIT_DEFAULT 97#define MULTILIB_DEFAULTS { "m64" } 98#else 99#define MULTILIB_DEFAULTS { "m32" } 100#endif 101 102/* Put all *tf routines in libgcc. */ 103#undef LIBGCC2_HAS_TF_MODE 104#define LIBGCC2_HAS_TF_MODE 1 105#define LIBGCC2_TF_CEXT q 106#define TF_SIZE 113 107 108#define TARGET_ASM_FILE_END file_end_indicate_exec_stack 109 110#define MD_UNWIND_SUPPORT "config/i386/linux-unwind.h" 111 112/* The stack pointer needs to be moved while checking the stack. */ 113#define STACK_CHECK_MOVING_SP 1 114 115/* This macro may be overridden in i386/k*bsd-gnu.h. */ 116#define REG_NAME(reg) reg 117 118#ifdef TARGET_LIBC_PROVIDES_SSP 119/* i386 glibc provides __stack_chk_guard in %gs:0x14, 120 x86_64 glibc provides it in %fs:0x28. */ 121#define TARGET_THREAD_SSP_OFFSET (TARGET_64BIT ? 0x28 : 0x14) 122#endif 123