197 lines
7.8 KiB
C
197 lines
7.8 KiB
C
/* Definitions for AMD x86-64 running Linux-based GNU systems with ELF format.
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Copyright (C) 2001, 2002 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, 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, 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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#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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/* Do code reading to identify a signal frame, and set the frame
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state data appropriately. See unwind-dw2.c for the structs.
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Don't use this at all if inhibit_libc is used. */
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#ifndef inhibit_libc
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#ifdef IN_LIBGCC2
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#include <signal.h>
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#include <sys/ucontext.h>
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#endif
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#ifdef __x86_64__
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#define MD_FALLBACK_FRAME_STATE_FOR(CONTEXT, FS, SUCCESS) \
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do { \
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unsigned char *pc_ = (CONTEXT)->ra; \
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struct sigcontext *sc_; \
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long new_cfa_; \
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\
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/* movq __NR_rt_sigreturn, %rax ; syscall */ \
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if (*(unsigned char *)(pc_+0) == 0x48 \
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&& *(unsigned long *)(pc_+1) == 0x050f0000000fc0c7) \
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{ \
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struct ucontext *uc_ = (CONTEXT)->cfa; \
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sc_ = (struct sigcontext *) &uc_->uc_mcontext; \
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} \
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else \
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break; \
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\
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new_cfa_ = sc_->rsp; \
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(FS)->cfa_how = CFA_REG_OFFSET; \
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/* Register 7 is rsp */ \
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(FS)->cfa_reg = 7; \
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(FS)->cfa_offset = new_cfa_ - (long) (CONTEXT)->cfa; \
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\
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/* The SVR4 register numbering macros aren't usable in libgcc. */ \
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(FS)->regs.reg[0].how = REG_SAVED_OFFSET; \
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(FS)->regs.reg[0].loc.offset = (long)&sc_->rax - new_cfa_; \
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(FS)->regs.reg[1].how = REG_SAVED_OFFSET; \
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(FS)->regs.reg[1].loc.offset = (long)&sc_->rdx - new_cfa_; \
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(FS)->regs.reg[2].how = REG_SAVED_OFFSET; \
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(FS)->regs.reg[2].loc.offset = (long)&sc_->rcx - new_cfa_; \
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(FS)->regs.reg[3].how = REG_SAVED_OFFSET; \
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(FS)->regs.reg[3].loc.offset = (long)&sc_->rbx - new_cfa_; \
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(FS)->regs.reg[4].how = REG_SAVED_OFFSET; \
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(FS)->regs.reg[4].loc.offset = (long)&sc_->rsi - new_cfa_; \
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(FS)->regs.reg[5].how = REG_SAVED_OFFSET; \
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(FS)->regs.reg[5].loc.offset = (long)&sc_->rdi - new_cfa_; \
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(FS)->regs.reg[6].how = REG_SAVED_OFFSET; \
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(FS)->regs.reg[6].loc.offset = (long)&sc_->rbp - new_cfa_; \
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(FS)->regs.reg[8].how = REG_SAVED_OFFSET; \
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(FS)->regs.reg[8].loc.offset = (long)&sc_->r8 - new_cfa_; \
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(FS)->regs.reg[9].how = REG_SAVED_OFFSET; \
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(FS)->regs.reg[9].loc.offset = (long)&sc_->r9 - new_cfa_; \
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(FS)->regs.reg[10].how = REG_SAVED_OFFSET; \
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(FS)->regs.reg[10].loc.offset = (long)&sc_->r10 - new_cfa_; \
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(FS)->regs.reg[11].how = REG_SAVED_OFFSET; \
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(FS)->regs.reg[11].loc.offset = (long)&sc_->r11 - new_cfa_; \
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(FS)->regs.reg[12].how = REG_SAVED_OFFSET; \
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(FS)->regs.reg[12].loc.offset = (long)&sc_->r12 - new_cfa_; \
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(FS)->regs.reg[13].how = REG_SAVED_OFFSET; \
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(FS)->regs.reg[13].loc.offset = (long)&sc_->r13 - new_cfa_; \
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(FS)->regs.reg[14].how = REG_SAVED_OFFSET; \
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(FS)->regs.reg[14].loc.offset = (long)&sc_->r14 - new_cfa_; \
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(FS)->regs.reg[15].how = REG_SAVED_OFFSET; \
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(FS)->regs.reg[15].loc.offset = (long)&sc_->r15 - new_cfa_; \
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(FS)->regs.reg[16].how = REG_SAVED_OFFSET; \
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(FS)->regs.reg[16].loc.offset = (long)&sc_->rip - new_cfa_; \
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(FS)->retaddr_column = 16; \
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goto SUCCESS; \
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} while (0)
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#else /* ifdef __x86_64__ */
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#define MD_FALLBACK_FRAME_STATE_FOR(CONTEXT, FS, SUCCESS) \
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do { \
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unsigned char *pc_ = (CONTEXT)->ra; \
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struct sigcontext *sc_; \
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long new_cfa_; \
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\
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/* popl %eax ; movl $__NR_sigreturn,%eax ; int $0x80 */ \
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if (*(unsigned short *)(pc_+0) == 0xb858 \
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&& *(unsigned int *)(pc_+2) == 119 \
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&& *(unsigned short *)(pc_+6) == 0x80cd) \
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sc_ = (CONTEXT)->cfa + 4; \
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/* movl $__NR_rt_sigreturn,%eax ; int $0x80 */ \
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else if (*(unsigned char *)(pc_+0) == 0xb8 \
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&& *(unsigned int *)(pc_+1) == 173 \
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&& *(unsigned short *)(pc_+5) == 0x80cd) \
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{ \
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struct rt_sigframe { \
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int sig; \
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struct siginfo *pinfo; \
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void *puc; \
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struct siginfo info; \
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struct ucontext uc; \
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} *rt_ = (CONTEXT)->cfa; \
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sc_ = (struct sigcontext *) &rt_->uc.uc_mcontext; \
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} \
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else \
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break; \
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\
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new_cfa_ = sc_->esp; \
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(FS)->cfa_how = CFA_REG_OFFSET; \
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(FS)->cfa_reg = 4; \
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(FS)->cfa_offset = new_cfa_ - (long) (CONTEXT)->cfa; \
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\
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/* The SVR4 register numbering macros aren't usable in libgcc. */ \
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(FS)->regs.reg[0].how = REG_SAVED_OFFSET; \
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(FS)->regs.reg[0].loc.offset = (long)&sc_->eax - new_cfa_; \
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(FS)->regs.reg[3].how = REG_SAVED_OFFSET; \
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(FS)->regs.reg[3].loc.offset = (long)&sc_->ebx - new_cfa_; \
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(FS)->regs.reg[1].how = REG_SAVED_OFFSET; \
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(FS)->regs.reg[1].loc.offset = (long)&sc_->ecx - new_cfa_; \
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(FS)->regs.reg[2].how = REG_SAVED_OFFSET; \
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(FS)->regs.reg[2].loc.offset = (long)&sc_->edx - new_cfa_; \
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(FS)->regs.reg[6].how = REG_SAVED_OFFSET; \
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(FS)->regs.reg[6].loc.offset = (long)&sc_->esi - new_cfa_; \
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(FS)->regs.reg[7].how = REG_SAVED_OFFSET; \
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(FS)->regs.reg[7].loc.offset = (long)&sc_->edi - new_cfa_; \
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(FS)->regs.reg[5].how = REG_SAVED_OFFSET; \
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(FS)->regs.reg[5].loc.offset = (long)&sc_->ebp - new_cfa_; \
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(FS)->regs.reg[8].how = REG_SAVED_OFFSET; \
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(FS)->regs.reg[8].loc.offset = (long)&sc_->eip - new_cfa_; \
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(FS)->retaddr_column = 8; \
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goto SUCCESS; \
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} while (0)
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#endif /* ifdef __x86_64__ */
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#endif /* ifdef inhibit_libc */
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