| /* Definitions of target machine for GNU compiler, |
| for PowerPC machines running Linux. |
| Copyright (C) 1996-2015 Free Software Foundation, Inc. |
| Contributed by Michael Meissner (meissner@cygnus.com). |
| |
| This file is part of GCC. |
| |
| GCC is free software; you can redistribute it and/or modify it |
| under the terms of the GNU General Public License as published |
| by the Free Software Foundation; either version 3, or (at your |
| option) any later version. |
| |
| GCC is distributed in the hope that it will be useful, but WITHOUT |
| ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
| or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public |
| License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GCC; see the file COPYING3. If not see |
| <http://www.gnu.org/licenses/>. */ |
| |
| /* Linux doesn't support saving and restoring 64-bit regs in a 32-bit |
| process. */ |
| #define OS_MISSING_POWERPC64 1 |
| |
| /* We use glibc _mcount for profiling. */ |
| #define NO_PROFILE_COUNTERS 1 |
| |
| #ifdef SINGLE_LIBC |
| #define OPTION_GLIBC (DEFAULT_LIBC == LIBC_GLIBC) |
| #define OPTION_UCLIBC (DEFAULT_LIBC == LIBC_UCLIBC) |
| #define OPTION_BIONIC (DEFAULT_LIBC == LIBC_BIONIC) |
| #else |
| #define OPTION_GLIBC (linux_libc == LIBC_GLIBC) |
| #define OPTION_UCLIBC (linux_libc == LIBC_UCLIBC) |
| #define OPTION_BIONIC (linux_libc == LIBC_BIONIC) |
| #endif |
| |
| /* Determine what functions are present at the runtime; |
| this includes full c99 runtime and sincos. */ |
| #undef TARGET_LIBC_HAS_FUNCTION |
| #define TARGET_LIBC_HAS_FUNCTION linux_libc_has_function |
| |
| #undef TARGET_OS_CPP_BUILTINS |
| #define TARGET_OS_CPP_BUILTINS() \ |
| do \ |
| { \ |
| builtin_define_std ("PPC"); \ |
| builtin_define_std ("powerpc"); \ |
| builtin_assert ("cpu=powerpc"); \ |
| builtin_assert ("machine=powerpc"); \ |
| TARGET_OS_SYSV_CPP_BUILTINS (); \ |
| } \ |
| while (0) |
| |
| #undef CPP_OS_DEFAULT_SPEC |
| #define CPP_OS_DEFAULT_SPEC "%(cpp_os_linux)" |
| |
| #undef LINK_SHLIB_SPEC |
| #define LINK_SHLIB_SPEC "%{shared:-shared} %{!shared: %{static:-static}}" |
| |
| #undef LIB_DEFAULT_SPEC |
| #define LIB_DEFAULT_SPEC "%(lib_linux)" |
| |
| #undef STARTFILE_DEFAULT_SPEC |
| #define STARTFILE_DEFAULT_SPEC "%(startfile_linux)" |
| |
| #undef ENDFILE_DEFAULT_SPEC |
| #define ENDFILE_DEFAULT_SPEC "%(endfile_linux)" |
| |
| #undef LINK_START_DEFAULT_SPEC |
| #define LINK_START_DEFAULT_SPEC "%(link_start_linux)" |
| |
| #undef LINK_OS_DEFAULT_SPEC |
| #define LINK_OS_DEFAULT_SPEC "%(link_os_linux)" |
| |
| #undef DEFAULT_ASM_ENDIAN |
| #if (TARGET_DEFAULT & MASK_LITTLE_ENDIAN) |
| #define DEFAULT_ASM_ENDIAN " -mlittle" |
| #define LINK_OS_LINUX_EMUL ENDIAN_SELECT(" -m elf32ppclinux", \ |
| " -m elf32lppclinux", \ |
| " -m elf32lppclinux") |
| #else |
| #define DEFAULT_ASM_ENDIAN " -mbig" |
| #define LINK_OS_LINUX_EMUL ENDIAN_SELECT(" -m elf32ppclinux", \ |
| " -m elf32lppclinux", \ |
| " -m elf32ppclinux") |
| #endif |
| |
| #undef LINK_OS_LINUX_SPEC |
| #define LINK_OS_LINUX_SPEC LINK_OS_LINUX_EMUL " %{!shared: %{!static: \ |
| %{rdynamic:-export-dynamic} \ |
| -dynamic-linker " GNU_USER_DYNAMIC_LINKER "}}" |
| |
| /* For backward compatibility, we must continue to use the AIX |
| structure return convention. */ |
| #undef DRAFT_V4_STRUCT_RET |
| #define DRAFT_V4_STRUCT_RET 1 |
| |
| /* We are 32-bit all the time, so optimize a little. */ |
| #undef TARGET_64BIT |
| #define TARGET_64BIT 0 |
| |
| /* We don't need to generate entries in .fixup, except when |
| -mrelocatable or -mrelocatable-lib is given. */ |
| #undef RELOCATABLE_NEEDS_FIXUP |
| #define RELOCATABLE_NEEDS_FIXUP \ |
| (rs6000_isa_flags & rs6000_isa_flags_explicit & OPTION_MASK_RELOCATABLE) |
| |
| #ifdef TARGET_LIBC_PROVIDES_SSP |
| /* ppc32 glibc provides __stack_chk_guard in -0x7008(2). */ |
| #define TARGET_THREAD_SSP_OFFSET -0x7008 |
| #endif |
| |
| #define POWERPC_LINUX |
| |
| /* ppc linux has 128-bit long double support in glibc 2.4 and later. */ |
| #ifdef TARGET_DEFAULT_LONG_DOUBLE_128 |
| #define RS6000_DEFAULT_LONG_DOUBLE_SIZE 128 |
| #endif |
| |
| /* Static stack checking is supported by means of probes. */ |
| #define STACK_CHECK_STATIC_BUILTIN 1 |
| |
| /* Software floating point support for exceptions and rounding modes |
| depends on the C library in use. */ |
| #undef TARGET_FLOAT_EXCEPTIONS_ROUNDING_SUPPORTED_P |
| #define TARGET_FLOAT_EXCEPTIONS_ROUNDING_SUPPORTED_P \ |
| rs6000_linux_float_exceptions_rounding_supported_p |
| |
| /* Support for TARGET_ATOMIC_ASSIGN_EXPAND_FENV without FPRs depends |
| on glibc 2.19 or greater. */ |
| #if TARGET_GLIBC_MAJOR > 2 \ |
| || (TARGET_GLIBC_MAJOR == 2 && TARGET_GLIBC_MINOR >= 19) |
| #define RS6000_GLIBC_ATOMIC_FENV 1 |
| #endif |