gcc/config/i386/gnu-user64.h

   1 /* Definitions for AMD x86-64 using GNU userspace.
   2    Copyright (C) 2001-2018 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       %{!static-pie: \
  63         %{rdynamic:-export-dynamic} \
  64         %{" SPEC_32 ":-dynamic-linker " GNU_USER_DYNAMIC_LINKER32 "} \
  65         %{" SPEC_64 ":-dynamic-linker " GNU_USER_DYNAMIC_LINKER64 "} \
  66         %{" SPEC_X32 ":-dynamic-linker " GNU_USER_DYNAMIC_LINKERX32 "}}} \
  67     %{static:-static} %{static-pie:-static -pie --no-dynamic-linker -z text}}"
  68
  69 #undef  LINK_SPEC
  70 #define LINK_SPEC GNU_USER_TARGET_LINK_SPEC
  71
  72 #if TARGET_64BIT_DEFAULT
  73 #if TARGET_BI_ARCH == 2
  74 #define MULTILIB_DEFAULTS { "mx32" }
  75 #else
  76 #define MULTILIB_DEFAULTS { "m64" }
  77 #endif
  78 #else
  79 #define MULTILIB_DEFAULTS { "m32" }
  80 #endif
  81
  82 #ifdef TARGET_LIBC_PROVIDES_SSP
  83 /* i386 glibc provides __stack_chk_guard in %gs:0x14,
  84    x32 glibc provides it in %fs:0x18.
  85    x86_64 glibc provides it in %fs:0x28.  */
  86 #define TARGET_THREAD_SSP_OFFSET \
  87   (TARGET_64BIT ? (TARGET_X32 ? 0x18 : 0x28) : 0x14)
  88
  89 /* i386 glibc provides __private_ss in %gs:0x30.
  90    x32 glibc provides it in %fs:0x40.
  91    x86_64 glibc provides it in %fs:0x70.  */
  92 #define TARGET_THREAD_SPLIT_STACK_OFFSET \
  93   (TARGET_64BIT ? (TARGET_X32 ? 0x40 : 0x70) : 0x30)
  94 #endif
  95
  96 #undef WCHAR_TYPE
  97 #define WCHAR_TYPE (TARGET_LP64 ? "int" : "long int")