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jlechner |
/* Definitions for AMD x86-64 running Linux-based GNU systems with ELF format.
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Copyright (C) 2001, 2002, 2004 Free Software Foundation, Inc.
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Contributed by Jan Hubicka <jh@suse.cz>, based on linux.h.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GCC is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING. If not, write to
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the Free Software Foundation, 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301, USA. */
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#define TARGET_VERSION fprintf (stderr, " (x86-64 Linux/ELF)");
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#define TARGET_OS_CPP_BUILTINS() \
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do \
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{ \
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LINUX_TARGET_OS_CPP_BUILTINS(); \
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if (flag_pic) \
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{ \
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builtin_define ("__PIC__"); \
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builtin_define ("__pic__"); \
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} \
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} \
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while (0)
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#undef CPP_SPEC
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#define CPP_SPEC "%{posix:-D_POSIX_SOURCE} %{pthread:-D_REENTRANT}"
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/* The svr4 ABI for the i386 says that records and unions are returned
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in memory. In the 64bit compilation we will turn this flag off in
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override_options, as we never do pcc_struct_return scheme on this target. */
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#undef DEFAULT_PCC_STRUCT_RETURN
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#define DEFAULT_PCC_STRUCT_RETURN 1
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/* We arrange for the whole %fs segment to map the tls area. */
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#undef TARGET_TLS_DIRECT_SEG_REFS_DEFAULT
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#define TARGET_TLS_DIRECT_SEG_REFS_DEFAULT MASK_TLS_DIRECT_SEG_REFS
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/* Provide a LINK_SPEC. Here we provide support for the special GCC
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options -static and -shared, which allow us to link things in one
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of these three modes by applying the appropriate combinations of
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options at link-time.
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When the -shared link option is used a final link is not being
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done. */
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#undef LINK_SPEC
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#define LINK_SPEC "%{!m32:-m elf_x86_64} %{m32:-m elf_i386} \
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%{shared:-shared} \
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%{!shared: \
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%{!static: \
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%{rdynamic:-export-dynamic} \
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%{m32:%{!dynamic-linker:-dynamic-linker /lib/ld-linux.so.2}} \
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%{!m32:%{!dynamic-linker:-dynamic-linker /lib64/ld-linux-x86-64.so.2}}} \
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%{static:-static}}"
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/* Similar to standard Linux, but adding -ffast-math support. */
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#undef ENDFILE_SPEC
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#define ENDFILE_SPEC \
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"%{ffast-math|funsafe-math-optimizations:crtfastmath.o%s} \
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%{shared|pie:crtendS.o%s;:crtend.o%s} crtn.o%s"
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#define MULTILIB_DEFAULTS { "m64" }
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#undef NEED_INDICATE_EXEC_STACK
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#define NEED_INDICATE_EXEC_STACK 1
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#define MD_UNWIND_SUPPORT "config/i386/linux-unwind.h"
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/* This macro may be overridden in i386/k*bsd-gnu.h. */
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#define REG_NAME(reg) reg
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#ifdef TARGET_LIBC_PROVIDES_SSP
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/* i386 glibc provides __stack_chk_guard in %gs:0x14,
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x86_64 glibc provides it in %fs:0x28. */
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#define TARGET_THREAD_SSP_OFFSET (TARGET_64BIT ? 0x28 : 0x14)
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#endif
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