1 /* Definitions for Linux for S/390. 2 Copyright (C) 1999-2018 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=arch3:-march=g5}" \ 59 "%{march=arch5:-march=z900}" \ 60 "%{march=arch6:-march=z990}" \ 61 "%{march=arch7:-march=z9-ec}" \ 62 "%{march=arch8:-march=z10}" \ 63 "%{march=arch9:-march=z196}" \ 64 "%{march=arch10:-march=zEC12}" \ 65 "%{march=arch11:-march=z13}" 66 67 68 /* Target specific linker settings. */ 69 70 #ifdef DEFAULT_TARGET_64BIT 71 #define MULTILIB_DEFAULTS { "m64" } 72 #else 73 #define MULTILIB_DEFAULTS { "m31" } 74 #endif 75 76 #define GLIBC_DYNAMIC_LINKER32 "/lib/ld.so.1" 77 #define GLIBC_DYNAMIC_LINKER64 "/lib/ld64.so.1" 78 79 #undef LINK_SPEC 80 #define LINK_SPEC \ 81 "%{m31:-m elf_s390}%{m64:-m elf64_s390} \ 82 %{shared:-shared} \ 83 %{!shared: \ 84 %{static:-static} \ 85 %{!static:%{!static-pie: \ 86 %{rdynamic:-export-dynamic} \ 87 %{m31:-dynamic-linker " GNU_USER_DYNAMIC_LINKER32 "} \ 88 %{m64:-dynamic-linker " GNU_USER_DYNAMIC_LINKER64 "}}}} \ 89 %{static-pie:-static -pie --no-dynamic-linker -z text}" 90 91 #define CPP_SPEC "%{posix:-D_POSIX_SOURCE} %{pthread:-D_REENTRANT}" 92 93 #define TARGET_ASM_FILE_END file_end_indicate_exec_stack 94 95 #ifdef TARGET_LIBC_PROVIDES_SSP 96 /* s390 glibc provides __stack_chk_guard in 0x14(tp), 97 s390x glibc provides it at 0x28(tp). */ 98 #define TARGET_THREAD_SSP_OFFSET (TARGET_64BIT ? 0x28 : 0x14) 99 #endif 100 101 /* Define if long doubles should be mangled as 'g'. */ 102 #define TARGET_ALTERNATE_LONG_DOUBLE_MANGLING 103 104 #undef TARGET_LIBC_HAS_FUNCTION 105 #define TARGET_LIBC_HAS_FUNCTION gnu_libc_has_function 106 107 /* Uninitialized common symbols in non-PIE executables, even with 108 strong definitions in dependent shared libraries, will resolve 109 to COPY relocated symbol in the executable. See PR65780. */ 110 #undef TARGET_BINDS_LOCAL_P 111 #define TARGET_BINDS_LOCAL_P default_binds_local_p_2 112 113 #endif 114