1/* Definitions for Linux for S/390. 2 Copyright (C) 1999-2022 Free Software Foundation, Inc. 3 Contributed by Hartmut Penner (hpenner@de.ibm.com) and 4 Ulrich Weigand (uweigand@de.ibm.com). 5 6This file is part of GCC. 7 8GCC is free software; you can redistribute it and/or modify it under 9the terms of the GNU General Public License as published by the Free 10Software Foundation; either version 3, or (at your option) any later 11version. 12 13GCC is distributed in the hope that it will be useful, but WITHOUT ANY 14WARRANTY; without even the implied warranty of MERCHANTABILITY or 15FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 16for more details. 17 18You should have received a copy of the GNU General Public License 19along 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 118