1 /* Definitions for AMD x86-64 using GNU userspace. 2 Copyright (C) 2001-2014 Free Software Foundation, Inc. 3 Contributed by Jan Hubicka <jh@suse.cz>, based on linux.h. 4 5 This file is part of GCC. 6 7 GCC is free software; you can redistribute it and/or modify 8 it under the terms of the GNU General Public License as published by 9 the Free Software Foundation; either version 3, or (at your option) 10 any later version. 11 12 GCC is distributed in the hope that it will be useful, 13 but WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 GNU General Public License for more details. 16 17 Under Section 7 of GPL version 3, you are granted additional 18 permissions described in the GCC Runtime Library Exception, version 19 3.1, as published by the Free Software Foundation. 20 21 You should have received a copy of the GNU General Public License and 22 a copy of the GCC Runtime Library Exception along with this program; 23 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 24 <http://www.gnu.org/licenses/>. */ 25 26 /* Provide a LINK_SPEC. Here we provide support for the special GCC 27 options -static and -shared, which allow us to link things in one 28 of these three modes by applying the appropriate combinations of 29 options at link-time. 30 31 When the -shared link option is used a final link is not being 32 done. */ 33 34 #if TARGET_64BIT_DEFAULT 35 #define SPEC_32 "m16|m32" 36 #if TARGET_BI_ARCH == 2 37 #define SPEC_64 "m64" 38 #define SPEC_X32 "m16|m32|m64:;" 39 #else 40 #define SPEC_64 "m16|m32|mx32:;" 41 #define SPEC_X32 "mx32" 42 #endif 43 #else 44 #define SPEC_32 "m64|mx32:;" 45 #define SPEC_64 "m64" 46 #define SPEC_X32 "mx32" 47 #endif 48 49 #undef ASM_SPEC 50 #define ASM_SPEC "%{" SPEC_32 ":--32} \ 51 %{" SPEC_64 ":--64} \ 52 %{" SPEC_X32 ":--x32} \ 53 %{!mno-sse2avx:%{mavx:-msse2avx}} %{msse2avx:%{!mavx:-msse2avx}}" 54 55 #define GNU_USER_TARGET_LINK_SPEC \ 56 "%{" SPEC_64 ":-m " GNU_USER_LINK_EMULATION64 "} \ 57 %{" SPEC_32 ":-m " GNU_USER_LINK_EMULATION32 "} \ 58 %{" SPEC_X32 ":-m " GNU_USER_LINK_EMULATIONX32 "} \ 59 %{shared:-shared} \ 60 %{!shared: \ 61 %{!static: \ 62 %{rdynamic:-export-dynamic} \ 63 %{" SPEC_32 ":-dynamic-linker " GNU_USER_DYNAMIC_LINKER32 "} \ 64 %{" SPEC_64 ":-dynamic-linker " GNU_USER_DYNAMIC_LINKER64 "} \ 65 %{" SPEC_X32 ":-dynamic-linker " GNU_USER_DYNAMIC_LINKERX32 "}} \ 66 %{static:-static}}" 67 68 #undef LINK_SPEC 69 #define LINK_SPEC GNU_USER_TARGET_LINK_SPEC 70 71 #if TARGET_64BIT_DEFAULT 72 #if TARGET_BI_ARCH == 2 73 #define MULTILIB_DEFAULTS { "mx32" } 74 #else 75 #define MULTILIB_DEFAULTS { "m64" } 76 #endif 77 #else 78 #define MULTILIB_DEFAULTS { "m32" } 79 #endif 80 81 #ifdef TARGET_LIBC_PROVIDES_SSP 82 /* i386 glibc provides __stack_chk_guard in %gs:0x14, 83 x32 glibc provides it in %fs:0x18. 84 x86_64 glibc provides it in %fs:0x28. */ 85 #define TARGET_THREAD_SSP_OFFSET \ 86 (TARGET_64BIT ? (TARGET_X32 ? 0x18 : 0x28) : 0x14) 87 88 /* We only build the -fsplit-stack support in libgcc if the 89 assembler has full support for the CFI directives. */ 90 #if HAVE_GAS_CFI_PERSONALITY_DIRECTIVE 91 #define TARGET_CAN_SPLIT_STACK 92 #endif 93 /* We steal the last transactional memory word. */ 94 #define TARGET_THREAD_SPLIT_STACK_OFFSET \ 95 (TARGET_64BIT ? (TARGET_X32 ? 0x40 : 0x70) : 0x30) 96 #endif 97 98 #undef WCHAR_TYPE 99 #define WCHAR_TYPE (TARGET_LP64 ? "int" : "long int") 100