1 /* Definitions of target machine for GNU compiler, 2 for PowerPC machines running Linux. 3 Copyright (C) 1996-2014 Free Software Foundation, Inc. 4 Contributed by Michael Meissner (meissner@cygnus.com). 5 6 This file is part of GCC. 7 8 GCC is free software; you can redistribute it and/or modify it 9 under the terms of the GNU General Public License as published 10 by the Free Software Foundation; either version 3, or (at your 11 option) any later version. 12 13 GCC is distributed in the hope that it will be useful, but WITHOUT 14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 15 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public 16 License 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 /* Linux doesn't support saving and restoring 64-bit regs in a 32-bit 23 process. */ 24 #define OS_MISSING_POWERPC64 1 25 26 /* We use glibc _mcount for profiling. */ 27 #define NO_PROFILE_COUNTERS 1 28 29 #ifdef SINGLE_LIBC 30 #define OPTION_GLIBC (DEFAULT_LIBC == LIBC_GLIBC) 31 #define OPTION_UCLIBC (DEFAULT_LIBC == LIBC_UCLIBC) 32 #define OPTION_BIONIC (DEFAULT_LIBC == LIBC_BIONIC) 33 #else 34 #define OPTION_GLIBC (linux_libc == LIBC_GLIBC) 35 #define OPTION_UCLIBC (linux_libc == LIBC_UCLIBC) 36 #define OPTION_BIONIC (linux_libc == LIBC_BIONIC) 37 #endif 38 39 /* Determine what functions are present at the runtime; 40 this includes full c99 runtime and sincos. */ 41 #undef TARGET_LIBC_HAS_FUNCTION 42 #define TARGET_LIBC_HAS_FUNCTION linux_libc_has_function 43 44 #undef TARGET_OS_CPP_BUILTINS 45 #define TARGET_OS_CPP_BUILTINS() \ 46 do \ 47 { \ 48 builtin_define_std ("PPC"); \ 49 builtin_define_std ("powerpc"); \ 50 builtin_assert ("cpu=powerpc"); \ 51 builtin_assert ("machine=powerpc"); \ 52 TARGET_OS_SYSV_CPP_BUILTINS (); \ 53 } \ 54 while (0) 55 56 #undef CPP_OS_DEFAULT_SPEC 57 #define CPP_OS_DEFAULT_SPEC "%(cpp_os_linux)" 58 59 /* The GNU C++ standard library currently requires _GNU_SOURCE being 60 defined on glibc-based systems. This temporary hack accomplishes this, 61 it should go away as soon as libstdc++-v3 has a real fix. */ 62 #undef CPLUSPLUS_CPP_SPEC 63 #define CPLUSPLUS_CPP_SPEC "-D_GNU_SOURCE %(cpp)" 64 65 #undef LINK_SHLIB_SPEC 66 #define LINK_SHLIB_SPEC "%{shared:-shared} %{!shared: %{static:-static}}" 67 68 #undef LIB_DEFAULT_SPEC 69 #define LIB_DEFAULT_SPEC "%(lib_linux)" 70 71 #undef STARTFILE_DEFAULT_SPEC 72 #define STARTFILE_DEFAULT_SPEC "%(startfile_linux)" 73 74 #undef ENDFILE_DEFAULT_SPEC 75 #define ENDFILE_DEFAULT_SPEC "%(endfile_linux)" 76 77 #undef LINK_START_DEFAULT_SPEC 78 #define LINK_START_DEFAULT_SPEC "%(link_start_linux)" 79 80 #undef LINK_OS_DEFAULT_SPEC 81 #define LINK_OS_DEFAULT_SPEC "%(link_os_linux)" 82 83 #undef DEFAULT_ASM_ENDIAN 84 #if (TARGET_DEFAULT & MASK_LITTLE_ENDIAN) 85 #define DEFAULT_ASM_ENDIAN " -mlittle" 86 #define LINK_OS_LINUX_EMUL ENDIAN_SELECT(" -m elf32ppclinux", \ 87 " -m elf32lppclinux", \ 88 " -m elf32lppclinux") 89 #else 90 #define DEFAULT_ASM_ENDIAN " -mbig" 91 #define LINK_OS_LINUX_EMUL ENDIAN_SELECT(" -m elf32ppclinux", \ 92 " -m elf32lppclinux", \ 93 " -m elf32ppclinux") 94 #endif 95 96 #undef LINK_OS_LINUX_SPEC 97 #define LINK_OS_LINUX_SPEC LINK_OS_LINUX_EMUL " %{!shared: %{!static: \ 98 %{rdynamic:-export-dynamic} \ 99 -dynamic-linker " GNU_USER_DYNAMIC_LINKER "}}" 100 101 #define LINK_GCC_C_SEQUENCE_SPEC \ 102 "%{static:--start-group} %G %L %{static:--end-group}%{!static:%G}" 103 104 /* Use --as-needed -lgcc_s for eh support. */ 105 #ifdef HAVE_LD_AS_NEEDED 106 #define USE_LD_AS_NEEDED 1 107 #endif 108 109 /* Override rs6000.h definition. */ 110 #undef ASM_APP_ON 111 #define ASM_APP_ON "#APP\n" 112 113 /* Override rs6000.h definition. */ 114 #undef ASM_APP_OFF 115 #define ASM_APP_OFF "#NO_APP\n" 116 117 /* For backward compatibility, we must continue to use the AIX 118 structure return convention. */ 119 #undef DRAFT_V4_STRUCT_RET 120 #define DRAFT_V4_STRUCT_RET 1 121 122 /* We are 32-bit all the time, so optimize a little. */ 123 #undef TARGET_64BIT 124 #define TARGET_64BIT 0 125 126 /* We don't need to generate entries in .fixup, except when 127 -mrelocatable or -mrelocatable-lib is given. */ 128 #undef RELOCATABLE_NEEDS_FIXUP 129 #define RELOCATABLE_NEEDS_FIXUP \ 130 (rs6000_isa_flags & rs6000_isa_flags_explicit & OPTION_MASK_RELOCATABLE) 131 132 #define TARGET_POSIX_IO 133 134 #ifdef TARGET_LIBC_PROVIDES_SSP 135 /* ppc32 glibc provides __stack_chk_guard in -0x7008(2). */ 136 #define TARGET_THREAD_SSP_OFFSET -0x7008 137 #endif 138 139 #define POWERPC_LINUX 140 141 /* ppc linux has 128-bit long double support in glibc 2.4 and later. */ 142 #ifdef TARGET_DEFAULT_LONG_DOUBLE_128 143 #define RS6000_DEFAULT_LONG_DOUBLE_SIZE 128 144 #endif 145 146 /* Static stack checking is supported by means of probes. */ 147 #define STACK_CHECK_STATIC_BUILTIN 1 148 149 /* Software floating point support for exceptions and rounding modes 150 depends on the C library in use. */ 151 #undef TARGET_FLOAT_EXCEPTIONS_ROUNDING_SUPPORTED_P 152 #define TARGET_FLOAT_EXCEPTIONS_ROUNDING_SUPPORTED_P \ 153 rs6000_linux_float_exceptions_rounding_supported_p 154