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/* Definitions for AMD x86-64 running Linux-based GNU systems with ELF format.
Copyright (C) 2001, 2002 Free Software Foundation, Inc.
Contributed by Jan Hubicka <jh@suse.cz>, based on linux.h.
This file is part of GNU CC.
GNU CC 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.
GNU CC 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 GNU CC; see the file COPYING. If not, write to
the Free Software Foundation, 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#define LINUX_DEFAULT_ELF
#define TARGET_VERSION fprintf (stderr, " (x86-64 Linux/ELF)");
#define TARGET_OS_CPP_BUILTINS() \
do \
{ \
builtin_define_std ("linux"); \
builtin_define_std ("unix"); \
builtin_define ("__gnu_linux__"); \
builtin_assert ("system=posix"); \
if (flag_pic) \
{ \
builtin_define ("__PIC__"); \
builtin_define ("__pic__"); \
} \
} \
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. */
#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 /lib/ld-linux.so.2}} \
%{!m32:%{!dynamic-linker:-dynamic-linker /lib64/ld-linux-x86-64.so.2}}} \
%{static:-static}}"
#define MULTILIB_DEFAULTS { "m64" }
#undef NEED_INDICATE_EXEC_STACK
#define NEED_INDICATE_EXEC_STACK 1
/* Do code reading to identify a signal frame, and set the frame
state data appropriately. See unwind-dw2.c for the structs.
Don't use this at all if inhibit_libc is used. */
#ifndef inhibit_libc
#ifdef IN_LIBGCC2
#include <signal.h>
#include <sys/ucontext.h>
#endif
#ifdef __x86_64__
#define MD_FALLBACK_FRAME_STATE_FOR(CONTEXT, FS, SUCCESS) \
do { \
unsigned char *pc_ = (CONTEXT)->ra; \
struct sigcontext *sc_; \
long new_cfa_; \
\
/* movq __NR_rt_sigreturn, %rax ; syscall */ \
if (*(unsigned char *)(pc_+0) == 0x48 \
&& *(unsigned long *)(pc_+1) == 0x050f0000000fc0c7) \
{ \
struct ucontext *uc_ = (CONTEXT)->cfa; \
sc_ = (struct sigcontext *) &uc_->uc_mcontext; \
} \
else \
break; \
\
new_cfa_ = sc_->rsp; \
(FS)->cfa_how = CFA_REG_OFFSET; \
/* Register 7 is rsp */ \
(FS)->cfa_reg = 7; \
(FS)->cfa_offset = new_cfa_ - (long) (CONTEXT)->cfa; \
\
/* The SVR4 register numbering macros aren't usable in libgcc. */ \
(FS)->regs.reg[0].how = REG_SAVED_OFFSET; \
(FS)->regs.reg[0].loc.offset = (long)&sc_->rax - new_cfa_; \
(FS)->regs.reg[1].how = REG_SAVED_OFFSET; \
(FS)->regs.reg[1].loc.offset = (long)&sc_->rdx - new_cfa_; \
(FS)->regs.reg[2].how = REG_SAVED_OFFSET; \
(FS)->regs.reg[2].loc.offset = (long)&sc_->rcx - new_cfa_; \
(FS)->regs.reg[3].how = REG_SAVED_OFFSET; \
(FS)->regs.reg[3].loc.offset = (long)&sc_->rbx - new_cfa_; \
(FS)->regs.reg[4].how = REG_SAVED_OFFSET; \
(FS)->regs.reg[4].loc.offset = (long)&sc_->rsi - new_cfa_; \
(FS)->regs.reg[5].how = REG_SAVED_OFFSET; \
(FS)->regs.reg[5].loc.offset = (long)&sc_->rdi - new_cfa_; \
(FS)->regs.reg[6].how = REG_SAVED_OFFSET; \
(FS)->regs.reg[6].loc.offset = (long)&sc_->rbp - new_cfa_; \
(FS)->regs.reg[8].how = REG_SAVED_OFFSET; \
(FS)->regs.reg[8].loc.offset = (long)&sc_->r8 - new_cfa_; \
(FS)->regs.reg[9].how = REG_SAVED_OFFSET; \
(FS)->regs.reg[9].loc.offset = (long)&sc_->r9 - new_cfa_; \
(FS)->regs.reg[10].how = REG_SAVED_OFFSET; \
(FS)->regs.reg[10].loc.offset = (long)&sc_->r10 - new_cfa_; \
(FS)->regs.reg[11].how = REG_SAVED_OFFSET; \
(FS)->regs.reg[11].loc.offset = (long)&sc_->r11 - new_cfa_; \
(FS)->regs.reg[12].how = REG_SAVED_OFFSET; \
(FS)->regs.reg[12].loc.offset = (long)&sc_->r12 - new_cfa_; \
(FS)->regs.reg[13].how = REG_SAVED_OFFSET; \
(FS)->regs.reg[13].loc.offset = (long)&sc_->r13 - new_cfa_; \
(FS)->regs.reg[14].how = REG_SAVED_OFFSET; \
(FS)->regs.reg[14].loc.offset = (long)&sc_->r14 - new_cfa_; \
(FS)->regs.reg[15].how = REG_SAVED_OFFSET; \
(FS)->regs.reg[15].loc.offset = (long)&sc_->r15 - new_cfa_; \
(FS)->regs.reg[16].how = REG_SAVED_OFFSET; \
(FS)->regs.reg[16].loc.offset = (long)&sc_->rip - new_cfa_; \
(FS)->retaddr_column = 16; \
goto SUCCESS; \
} while (0)
#else /* ifdef __x86_64__ */
#define MD_FALLBACK_FRAME_STATE_FOR(CONTEXT, FS, SUCCESS) \
do { \
unsigned char *pc_ = (CONTEXT)->ra; \
struct sigcontext *sc_; \
long new_cfa_; \
\
/* popl %eax ; movl $__NR_sigreturn,%eax ; int $0x80 */ \
if (*(unsigned short *)(pc_+0) == 0xb858 \
&& *(unsigned int *)(pc_+2) == 119 \
&& *(unsigned short *)(pc_+6) == 0x80cd) \
sc_ = (CONTEXT)->cfa + 4; \
/* movl $__NR_rt_sigreturn,%eax ; int $0x80 */ \
else if (*(unsigned char *)(pc_+0) == 0xb8 \
&& *(unsigned int *)(pc_+1) == 173 \
&& *(unsigned short *)(pc_+5) == 0x80cd) \
{ \
struct rt_sigframe { \
int sig; \
struct siginfo *pinfo; \
void *puc; \
struct siginfo info; \
struct ucontext uc; \
} *rt_ = (CONTEXT)->cfa; \
sc_ = (struct sigcontext *) &rt_->uc.uc_mcontext; \
} \
else \
break; \
\
new_cfa_ = sc_->esp; \
(FS)->cfa_how = CFA_REG_OFFSET; \
(FS)->cfa_reg = 4; \
(FS)->cfa_offset = new_cfa_ - (long) (CONTEXT)->cfa; \
\
/* The SVR4 register numbering macros aren't usable in libgcc. */ \
(FS)->regs.reg[0].how = REG_SAVED_OFFSET; \
(FS)->regs.reg[0].loc.offset = (long)&sc_->eax - new_cfa_; \
(FS)->regs.reg[3].how = REG_SAVED_OFFSET; \
(FS)->regs.reg[3].loc.offset = (long)&sc_->ebx - new_cfa_; \
(FS)->regs.reg[1].how = REG_SAVED_OFFSET; \
(FS)->regs.reg[1].loc.offset = (long)&sc_->ecx - new_cfa_; \
(FS)->regs.reg[2].how = REG_SAVED_OFFSET; \
(FS)->regs.reg[2].loc.offset = (long)&sc_->edx - new_cfa_; \
(FS)->regs.reg[6].how = REG_SAVED_OFFSET; \
(FS)->regs.reg[6].loc.offset = (long)&sc_->esi - new_cfa_; \
(FS)->regs.reg[7].how = REG_SAVED_OFFSET; \
(FS)->regs.reg[7].loc.offset = (long)&sc_->edi - new_cfa_; \
(FS)->regs.reg[5].how = REG_SAVED_OFFSET; \
(FS)->regs.reg[5].loc.offset = (long)&sc_->ebp - new_cfa_; \
(FS)->regs.reg[8].how = REG_SAVED_OFFSET; \
(FS)->regs.reg[8].loc.offset = (long)&sc_->eip - new_cfa_; \
(FS)->retaddr_column = 8; \
goto SUCCESS; \
} while (0)
#endif /* ifdef __x86_64__ */
#endif /* ifdef inhibit_libc */
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