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1 /* Definitions for Linux for S/390.
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131
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2 Copyright (C) 1999-2018 Free Software Foundation, Inc.
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3 Contributed by Hartmut Penner (hpenner@de.ibm.com) and
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4 Ulrich Weigand (uweigand@de.ibm.com).
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5
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6 This file is part of GCC.
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7
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8 GCC is free software; you can redistribute it and/or modify it under
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9 the terms of the GNU General Public License as published by the Free
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10 Software Foundation; either version 3, or (at your option) any later
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11 version.
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12
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13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
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15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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16 for more details.
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17
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18 You should have received a copy of the GNU General Public License
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19 along with GCC; see the file COPYING3. If not see
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20 <http://www.gnu.org/licenses/>. */
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21
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22 #ifndef _LINUX_H
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23 #define _LINUX_H
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24
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25 /* Target specific type definitions. */
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26
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111
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27 /* For 31 bit our size type differs from most other targets (where it
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28 is "unsigned int"). The difference tends to cause trouble e.g.:
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29 Glibc BZ #16712, GCC BZ #79358 but cannot be changed due to ABI
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30 issues. */
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31 #undef SIZE_TYPE
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32 #define SIZE_TYPE "long unsigned int"
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33 #undef PTRDIFF_TYPE
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34 #define PTRDIFF_TYPE (TARGET_64BIT ? "long int" : "int")
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35
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36 #undef WCHAR_TYPE
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37 #define WCHAR_TYPE "int"
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38 #undef WCHAR_TYPE_SIZE
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39 #define WCHAR_TYPE_SIZE 32
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40
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41
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42 /* Target specific preprocessor settings. */
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43
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44 #define TARGET_OS_CPP_BUILTINS() \
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45 do \
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46 { \
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47 GNU_USER_TARGET_OS_CPP_BUILTINS(); \
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48 } \
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49 while (0)
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50
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51
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52 /* Target specific assembler settings. */
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111
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53 /* Rewrite -march=arch* options to the original CPU name in order to
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54 make it work with older binutils. */
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0
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55 #undef ASM_SPEC
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111
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56 #define ASM_SPEC \
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57 "%{m31&m64}%{mesa&mzarch}%{march=z*}" \
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58 "%{march=arch5:-march=z900}" \
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59 "%{march=arch6:-march=z990}" \
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60 "%{march=arch7:-march=z9-ec}" \
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61 "%{march=arch8:-march=z10}" \
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62 "%{march=arch9:-march=z196}" \
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63 "%{march=arch10:-march=zEC12}" \
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64 "%{march=arch11:-march=z13}"
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0
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65
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66
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67 /* Target specific linker settings. */
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68
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69 #ifdef DEFAULT_TARGET_64BIT
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70 #define MULTILIB_DEFAULTS { "m64" }
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71 #else
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72 #define MULTILIB_DEFAULTS { "m31" }
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73 #endif
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74
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75 #define GLIBC_DYNAMIC_LINKER32 "/lib/ld.so.1"
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76 #define GLIBC_DYNAMIC_LINKER64 "/lib/ld64.so.1"
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77
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78 #undef LINK_SPEC
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79 #define LINK_SPEC \
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80 "%{m31:-m elf_s390}%{m64:-m elf64_s390} \
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81 %{shared:-shared} \
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82 %{!shared: \
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83 %{static:-static} \
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111
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84 %{!static:%{!static-pie: \
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85 %{rdynamic:-export-dynamic} \
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86 %{m31:-dynamic-linker " GNU_USER_DYNAMIC_LINKER32 "} \
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87 %{m64:-dynamic-linker " GNU_USER_DYNAMIC_LINKER64 "}}}} \
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88 %{static-pie:-static -pie --no-dynamic-linker -z text}"
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0
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89
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90 #define CPP_SPEC "%{posix:-D_POSIX_SOURCE} %{pthread:-D_REENTRANT}"
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91
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92 #define TARGET_ASM_FILE_END file_end_indicate_exec_stack
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93
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94 #ifdef TARGET_LIBC_PROVIDES_SSP
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95 /* s390 glibc provides __stack_chk_guard in 0x14(tp),
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96 s390x glibc provides it at 0x28(tp). */
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97 #define TARGET_THREAD_SSP_OFFSET (TARGET_64BIT ? 0x28 : 0x14)
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98 #endif
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99
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100 /* Define if long doubles should be mangled as 'g'. */
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101 #define TARGET_ALTERNATE_LONG_DOUBLE_MANGLING
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102
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103 #undef TARGET_LIBC_HAS_FUNCTION
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104 #define TARGET_LIBC_HAS_FUNCTION gnu_libc_has_function
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105
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106 /* Uninitialized common symbols in non-PIE executables, even with
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107 strong definitions in dependent shared libraries, will resolve
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108 to COPY relocated symbol in the executable. See PR65780. */
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109 #undef TARGET_BINDS_LOCAL_P
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110 #define TARGET_BINDS_LOCAL_P default_binds_local_p_2
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111
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112 #endif
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