| /* Definitions for AMD x86-64 running Linux-based GNU systems with ELF format. |
| Copyright (C) 2001, 2002, 2004, 2005, 2006 Free Software Foundation, Inc. |
| Contributed by Jan Hubicka <jh@suse.cz>, based on linux.h. |
| |
| 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 2, 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 COPYING. If not, write to |
| the Free Software Foundation, 51 Franklin Street, Fifth Floor, |
| Boston, MA 02110-1301, USA. */ |
| |
| #define TARGET_VERSION fprintf (stderr, " (x86-64 Linux/ELF)"); |
| |
| #define TARGET_OS_CPP_BUILTINS() \ |
| do \ |
| { \ |
| LINUX_TARGET_OS_CPP_BUILTINS(); \ |
| } \ |
| while (0) |
| |
| #undef CPP_SPEC |
| #define CPP_SPEC "%{posix:-D_POSIX_SOURCE} %{pthread:-D_REENTRANT}" |
| |
| /* The svr4 ABI for the i386 says that records and unions are returned |
| in memory. In the 64bit compilation we will turn this flag off in |
| override_options, as we never do pcc_struct_return scheme on this target. */ |
| #undef DEFAULT_PCC_STRUCT_RETURN |
| #define DEFAULT_PCC_STRUCT_RETURN 1 |
| |
| /* We arrange for the whole %fs segment to map the tls area. */ |
| #undef TARGET_TLS_DIRECT_SEG_REFS_DEFAULT |
| #define TARGET_TLS_DIRECT_SEG_REFS_DEFAULT MASK_TLS_DIRECT_SEG_REFS |
| |
| /* Provide a LINK_SPEC. Here we provide support for the special GCC |
| options -static and -shared, which allow us to link things in one |
| of these three modes by applying the appropriate combinations of |
| options at link-time. |
| |
| When the -shared link option is used a final link is not being |
| done. */ |
| |
| #define GLIBC_DYNAMIC_LINKER32 "/lib/ld-linux.so.2" |
| #define GLIBC_DYNAMIC_LINKER64 "/lib64/ld-linux-x86-64.so.2" |
| |
| #undef LINK_SPEC |
| #define LINK_SPEC "%{!m32:-m elf_x86_64} %{m32:-m elf_i386} \ |
| %{shared:-shared} \ |
| %{!shared: \ |
| %{!static: \ |
| %{rdynamic:-export-dynamic} \ |
| %{m32:%{!dynamic-linker:-dynamic-linker " LINUX_DYNAMIC_LINKER32 "}} \ |
| %{!m32:%{!dynamic-linker:-dynamic-linker " LINUX_DYNAMIC_LINKER64 "}}} \ |
| %{static:-static}}" |
| |
| /* Similar to standard Linux, but adding -ffast-math support. */ |
| #undef ENDFILE_SPEC |
| #define ENDFILE_SPEC \ |
| "%{ffast-math|funsafe-math-optimizations:crtfastmath.o%s} \ |
| %{shared|pie:crtendS.o%s;:crtend.o%s} crtn.o%s" |
| |
| #define MULTILIB_DEFAULTS { "m64" } |
| |
| #undef NEED_INDICATE_EXEC_STACK |
| #define NEED_INDICATE_EXEC_STACK 1 |
| |
| #define MD_UNWIND_SUPPORT "config/i386/linux-unwind.h" |
| |
| /* This macro may be overridden in i386/k*bsd-gnu.h. */ |
| #define REG_NAME(reg) reg |
| |
| #ifdef TARGET_LIBC_PROVIDES_SSP |
| /* i386 glibc provides __stack_chk_guard in %gs:0x14, |
| x86_64 glibc provides it in %fs:0x28. */ |
| #define TARGET_THREAD_SSP_OFFSET (TARGET_64BIT ? 0x28 : 0x14) |
| #endif |