/usr/lib/gcc/x86_64-linux-gnu/4.8/plugin/include/config/i386/gnu-user64.h is in gcc-4.8-plugin-dev 4.8.5-4ubuntu2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 | /* Definitions for AMD x86-64 using GNU userspace.
Copyright (C) 2001-2013 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/>. */
/* 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. */
#if TARGET_64BIT_DEFAULT
#define SPEC_32 "m32"
#if TARGET_BI_ARCH == 2
#define SPEC_64 "m64"
#define SPEC_X32 "m32|m64:;"
#else
#define SPEC_64 "m32|mx32:;"
#define SPEC_X32 "mx32"
#endif
#else
#define SPEC_32 "m64|mx32:;"
#define SPEC_64 "m64"
#define SPEC_X32 "mx32"
#endif
#undef ASM_SPEC
#define ASM_SPEC "%{" SPEC_32 ":--32} \
%{" SPEC_64 ":--64} \
%{" SPEC_X32 ":--x32} \
%{!mno-sse2avx:%{mavx:-msse2avx}} %{msse2avx:%{!mavx:-msse2avx}}"
#define GNU_USER_TARGET_LINK_SPEC \
"%{" SPEC_64 ":-m " GNU_USER_LINK_EMULATION64 "} \
%{" SPEC_32 ":-m " GNU_USER_LINK_EMULATION32 "} \
%{" SPEC_X32 ":-m " GNU_USER_LINK_EMULATIONX32 "} \
--hash-style=gnu \
--as-needed \
%{shared:-shared} \
%{!shared: \
%{!static: \
%{rdynamic:-export-dynamic} \
%{" SPEC_32 ":-dynamic-linker " GNU_USER_DYNAMIC_LINKER32 "} \
%{" SPEC_64 ":-dynamic-linker " GNU_USER_DYNAMIC_LINKER64 "} \
%{" SPEC_X32 ":-dynamic-linker " GNU_USER_DYNAMIC_LINKERX32 "}} \
%{static:-static}}"
#undef LINK_SPEC
#define LINK_SPEC GNU_USER_TARGET_LINK_SPEC
#if TARGET_64BIT_DEFAULT
#if TARGET_BI_ARCH == 2
#define MULTILIB_DEFAULTS { "mx32" }
#else
#define MULTILIB_DEFAULTS { "m64" }
#endif
#else
#define MULTILIB_DEFAULTS { "m32" }
#endif
#ifdef TARGET_LIBC_PROVIDES_SSP
/* i386 glibc provides __stack_chk_guard in %gs:0x14,
x32 glibc provides it in %fs:0x18.
x86_64 glibc provides it in %fs:0x28. */
#define TARGET_THREAD_SSP_OFFSET \
(TARGET_64BIT ? (TARGET_X32 ? 0x18 : 0x28) : 0x14)
/* We only build the -fsplit-stack support in libgcc if the
assembler has full support for the CFI directives. */
#if HAVE_GAS_CFI_PERSONALITY_DIRECTIVE
#define TARGET_CAN_SPLIT_STACK
#endif
/* We steal the last transactional memory word. */
#define TARGET_THREAD_SPLIT_STACK_OFFSET \
(TARGET_64BIT ? (TARGET_X32 ? 0x40 : 0x70) : 0x30)
#endif
#undef WCHAR_TYPE
#define WCHAR_TYPE (TARGET_LP64 ? "int" : "long int")
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