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 6 This file is part of GCC. 7 8 GCC is free software; you can redistribute it and/or modify 9 it under the terms of the GNU General Public License as published by 10 the Free Software Foundation; either version 3, or (at your option) 11 any later version. 12 13 GCC is distributed in the hope that it will be useful, 14 but WITHOUT ANY WARRANTY; without even the implied warranty of 15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 GNU General Public License for more details. 17 18 Under Section 7 of GPL version 3, you are granted additional 19 permissions described in the GCC Runtime Library Exception, version 20 3.1, as published by the Free Software Foundation. 21 22 You should have received a copy of the GNU General Public License and 23 a copy of the GCC Runtime Library Exception along with this program; 24 see 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