1  /* Definitions for AMD x86-64 using GNU userspace.
       2     Copyright (C) 2001-2023 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   %{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")