gcc/config/s390/linux.h

   1 /* Definitions for Linux for S/390.
   2    Copyright (C) 1999-2024 Free Software Foundation, Inc.
   3    Contributed by Hartmut Penner (hpenner@de.ibm.com) and
   4                   Ulrich Weigand (uweigand@de.ibm.com).
   5
   6 This file is part of GCC.
   7
   8 GCC is free software; you can redistribute it and/or modify it under
   9 the terms of the GNU General Public License as published by the Free
  10 Software Foundation; either version 3, or (at your option) any later
  11 version.
  12
  13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  15 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  16 for more details.
  17
  18 You should have received a copy of the GNU General Public License
  19 along with GCC; see the file COPYING3.  If not see
  20 <http://www.gnu.org/licenses/>.  */
  21
  22 #ifndef _LINUX_H
  23 #define _LINUX_H
  24
  25 /* Target specific type definitions.  */
  26
  27 /* For 31 bit our size type differs from most other targets (where it
  28    is "unsigned int").  The difference tends to cause trouble e.g.:
  29    Glibc BZ #16712, GCC BZ #79358 but cannot be changed due to ABI
  30    issues.  */
  31 #undef  SIZE_TYPE
  32 #define SIZE_TYPE "long unsigned int"
  33 #undef  PTRDIFF_TYPE
  34 #define PTRDIFF_TYPE (TARGET_64BIT ? "long int" : "int")
  35
  36 #undef  WCHAR_TYPE
  37 #define WCHAR_TYPE "int"
  38 #undef  WCHAR_TYPE_SIZE
  39 #define WCHAR_TYPE_SIZE 32
  40
  41
  42 /* Target specific preprocessor settings.  */
  43
  44 #define TARGET_OS_CPP_BUILTINS()                \
  45   do                                            \
  46     {                                           \
  47       GNU_USER_TARGET_OS_CPP_BUILTINS();        \
  48     }                                           \
  49   while (0)
  50
  51
  52 /* Target specific assembler settings.  */
  53 /* Rewrite -march=arch* options to the original CPU name in order to
  54    make it work with older binutils.  */
  55 #undef  ASM_SPEC
  56 #define ASM_SPEC                                        \
  57   "%{m31&m64}%{mesa&mzarch}%{march=z*}"                 \
  58   "%{march=arch5:-march=z900}"                          \
  59   "%{march=arch6:-march=z990}"                          \
  60   "%{march=arch7:-march=z9-ec}"                         \
  61   "%{march=arch8:-march=z10}"                           \
  62   "%{march=arch9:-march=z196}"                          \
  63   "%{march=arch10:-march=zEC12}"                        \
  64   "%{march=arch11:-march=z13}"
  65
  66
  67 /* Target specific linker settings.  */
  68
  69 #ifdef DEFAULT_TARGET_64BIT
  70 #define MULTILIB_DEFAULTS { "m64" }
  71 #else
  72 #define MULTILIB_DEFAULTS { "m31" }
  73 #endif
  74
  75 #define GLIBC_DYNAMIC_LINKER32 "/lib/ld.so.1"
  76 #define GLIBC_DYNAMIC_LINKER64 "/lib/ld64.so.1"
  77
  78 #undef MUSL_DYNAMIC_LINKER32
  79 #define MUSL_DYNAMIC_LINKER32 "/lib/ld-musl-s390.so.1"
  80 #undef MUSL_DYNAMIC_LINKER64
  81 #define MUSL_DYNAMIC_LINKER64 "/lib/ld-musl-s390x.so.1"
  82
  83 #undef  LINK_SPEC
  84 #define LINK_SPEC \
  85   "%{m31:-m elf_s390}%{m64:-m elf64_s390} \
  86    %{shared:-shared} \
  87    %{!shared: \
  88       %{static:-static} \
  89       %{!static:%{!static-pie: \
  90         %{rdynamic:-export-dynamic} \
  91         %{m31:-dynamic-linker " GNU_USER_DYNAMIC_LINKER32 "} \
  92         %{m64:-dynamic-linker " GNU_USER_DYNAMIC_LINKER64 "}}}} \
  93    %{static-pie:-static -pie --no-dynamic-linker -z text}"
  94
  95 #define CPP_SPEC "%{posix:-D_POSIX_SOURCE} %{pthread:-D_REENTRANT}"
  96
  97 #define TARGET_ASM_FILE_END file_end_indicate_exec_stack
  98
  99 #ifdef TARGET_LIBC_PROVIDES_SSP
 100 /* s390 glibc provides __stack_chk_guard in 0x14(tp),
 101    s390x glibc provides it at 0x28(tp).  */
 102 #define TARGET_THREAD_SSP_OFFSET        (TARGET_64BIT ? 0x28 : 0x14)
 103 #endif
 104
 105 /* Define if long doubles should be mangled as 'g'.  */
 106 #define TARGET_ALTERNATE_LONG_DOUBLE_MANGLING
 107
 108 #undef TARGET_LIBC_HAS_FUNCTION
 109 #define TARGET_LIBC_HAS_FUNCTION gnu_libc_has_function
 110
 111 /* Uninitialized common symbols in non-PIE executables, even with
 112    strong definitions in dependent shared libraries, will resolve
 113    to COPY relocated symbol in the executable.  See PR65780.  */
 114 #undef TARGET_BINDS_LOCAL_P
 115 #define TARGET_BINDS_LOCAL_P default_binds_local_p_2
 116
 117 #endif