141 lines
4.5 KiB
C
141 lines
4.5 KiB
C
/* Definitions of target machine for GNU compiler,
|
|
for PowerPC machines running Linux.
|
|
Copyright (C) 1996-2017 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)
|
|
#undef OPTION_MUSL
|
|
#define OPTION_MUSL (DEFAULT_LIBC == LIBC_MUSL)
|
|
#else
|
|
#define OPTION_GLIBC (linux_libc == LIBC_GLIBC)
|
|
#define OPTION_UCLIBC (linux_libc == LIBC_UCLIBC)
|
|
#define OPTION_BIONIC (linux_libc == LIBC_BIONIC)
|
|
#undef OPTION_MUSL
|
|
#define OPTION_MUSL (linux_libc == LIBC_MUSL)
|
|
#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
|