gnu/dist/gcc4/gcc/config/s390/linux.h

   1 /* Definitions for Linux for S/390.
   2    Copyright (C) 1999, 2000, 2001, 2002, 2004 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 2, 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 COPYING.  If not, write to the Free
  20 Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
  21 02110-1301, USA.  */
  22
  23 #ifndef _LINUX_H
  24 #define _LINUX_H
  25
  26 /* Target specific version string.  */
  27
  28 #ifdef DEFAULT_TARGET_64BIT
  29 #undef  TARGET_VERSION
  30 #define TARGET_VERSION fprintf (stderr, " (Linux for zSeries)");
  31 #else
  32 #undef  TARGET_VERSION
  33 #define TARGET_VERSION fprintf (stderr, " (Linux for S/390)");
  34 #endif
  35
  36
  37 /* Target specific type definitions.  */
  38
  39 /* ??? Do we really want long as size_t on 31-bit?  */
  40 #undef  SIZE_TYPE
  41 #define SIZE_TYPE (TARGET_64BIT ? "long unsigned int" : "long unsigned int")
  42 #undef  PTRDIFF_TYPE
  43 #define PTRDIFF_TYPE (TARGET_64BIT ? "long int" : "int")
  44
  45 #undef  WCHAR_TYPE
  46 #define WCHAR_TYPE "int"
  47 #undef  WCHAR_TYPE_SIZE
  48 #define WCHAR_TYPE_SIZE 32
  49
  50
  51 /* Target specific preprocessor settings.  */
  52
  53 #define TARGET_OS_CPP_BUILTINS()                \
  54   do                                            \
  55     {                                           \
  56       LINUX_TARGET_OS_CPP_BUILTINS();           \
  57       if (flag_pic)                             \
  58         {                                       \
  59           builtin_define ("__PIC__");           \
  60           builtin_define ("__pic__");           \
  61         }                                       \
  62     }                                           \
  63   while (0)
  64
  65
  66 /* Target specific assembler settings.  */
  67
  68 #undef  ASM_SPEC
  69 #define ASM_SPEC "%{m31&m64}%{mesa&mzarch}%{march=*}"
  70
  71
  72 /* Target specific linker settings.  */
  73
  74 #ifdef DEFAULT_TARGET_64BIT
  75 #define MULTILIB_DEFAULTS { "m64" }
  76 #else
  77 #define MULTILIB_DEFAULTS { "m31" }
  78 #endif
  79
  80 #undef  LINK_SPEC
  81 #define LINK_SPEC \
  82   "%{m31:-m elf_s390}%{m64:-m elf64_s390} \
  83    %{shared:-shared} \
  84    %{!shared: \
  85       %{static:-static} \
  86       %{!static: \
  87         %{rdynamic:-export-dynamic} \
  88         %{!dynamic-linker: \
  89           %{m31:-dynamic-linker /lib/ld.so.1} \
  90           %{m64:-dynamic-linker /lib/ld64.so.1}}}}"
  91
  92 #define CPP_SPEC "%{posix:-D_POSIX_SOURCE} %{pthread:-D_REENTRANT}"
  93
  94 #define TARGET_ASM_FILE_END file_end_indicate_exec_stack
  95
  96 #define MD_UNWIND_SUPPORT "config/s390/linux-unwind.h"
  97
  98 #ifdef TARGET_LIBC_PROVIDES_SSP
  99 /* s390 glibc provides __stack_chk_guard in 0x14(tp),
 100    s390x glibc provides it at 0x28(tp).  */
 101 #define TARGET_THREAD_SSP_OFFSET        (TARGET_64BIT ? 0x28 : 0x14)
 102 #endif
 103
 104 /* Define if long doubles should be mangled as 'g'.  */
 105 #define TARGET_ALTERNATE_LONG_DOUBLE_MANGLING
 106
 107 #endif