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Diffstat (limited to 'contrib/gcc/config/i386/linux-unwind.h')
| -rw-r--r-- | contrib/gcc/config/i386/linux-unwind.h | 181 |
1 files changed, 0 insertions, 181 deletions
diff --git a/contrib/gcc/config/i386/linux-unwind.h b/contrib/gcc/config/i386/linux-unwind.h deleted file mode 100644 index 07979d319b65..000000000000 --- a/contrib/gcc/config/i386/linux-unwind.h +++ /dev/null @@ -1,181 +0,0 @@ -/* DWARF2 EH unwinding support for AMD x86-64 and x86. - Copyright (C) 2004, 2005, 2006 Free Software Foundation, Inc. - -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. - -In addition to the permissions in the GNU General Public License, the -Free Software Foundation gives you unlimited permission to link the -compiled version of this file with other programs, and to distribute -those programs without any restriction coming from the use of this -file. (The General Public License restrictions do apply in other -respects; for example, they cover modification of the file, and -distribution when not linked into another program.) - -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. */ - -/* 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 __x86_64__ - -#include <signal.h> -#include <sys/ucontext.h> - -#define MD_FALLBACK_FRAME_STATE_FOR x86_64_fallback_frame_state - -static _Unwind_Reason_Code -x86_64_fallback_frame_state (struct _Unwind_Context *context, - _Unwind_FrameState *fs) -{ - 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; - /* The void * cast is necessary to avoid an aliasing warning. - The aliasing warning is correct, but should not be a problem - because it does not alias anything. */ - sc = (struct sigcontext *) (void *) &uc_->uc_mcontext; - } - else - return _URC_END_OF_STACK; - - 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; - fs->signal_frame = 1; - return _URC_NO_REASON; -} - -#else /* ifdef __x86_64__ */ - -/* There's no sys/ucontext.h for glibc 2.0, so no - signal-turned-exceptions for them. There's also no configure-run for - the target, so we can't check on (e.g.) HAVE_SYS_UCONTEXT_H. Using the - target libc version macro should be enough. */ -#if !(__GLIBC__ == 2 && __GLIBC_MINOR__ == 0) - -#include <signal.h> -#include <sys/ucontext.h> - -#define MD_FALLBACK_FRAME_STATE_FOR x86_fallback_frame_state - -static _Unwind_Reason_Code -x86_fallback_frame_state (struct _Unwind_Context *context, - _Unwind_FrameState *fs) -{ - 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; - /* The void * cast is necessary to avoid an aliasing warning. - The aliasing warning is correct, but should not be a problem - because it does not alias anything. */ - sc = (struct sigcontext *) (void *) &rt_->uc.uc_mcontext; - } - else - return _URC_END_OF_STACK; - - new_cfa = sc->REG_NAME(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->REG_NAME(eax) - new_cfa; - fs->regs.reg[3].how = REG_SAVED_OFFSET; - fs->regs.reg[3].loc.offset = (long)&sc->REG_NAME(ebx) - new_cfa; - fs->regs.reg[1].how = REG_SAVED_OFFSET; - fs->regs.reg[1].loc.offset = (long)&sc->REG_NAME(ecx) - new_cfa; - fs->regs.reg[2].how = REG_SAVED_OFFSET; - fs->regs.reg[2].loc.offset = (long)&sc->REG_NAME(edx) - new_cfa; - fs->regs.reg[6].how = REG_SAVED_OFFSET; - fs->regs.reg[6].loc.offset = (long)&sc->REG_NAME(esi) - new_cfa; - fs->regs.reg[7].how = REG_SAVED_OFFSET; - fs->regs.reg[7].loc.offset = (long)&sc->REG_NAME(edi) - new_cfa; - fs->regs.reg[5].how = REG_SAVED_OFFSET; - fs->regs.reg[5].loc.offset = (long)&sc->REG_NAME(ebp) - new_cfa; - fs->regs.reg[8].how = REG_SAVED_OFFSET; - fs->regs.reg[8].loc.offset = (long)&sc->REG_NAME(eip) - new_cfa; - fs->retaddr_column = 8; - fs->signal_frame = 1; - return _URC_NO_REASON; -} -#endif /* not glibc 2.0 */ -#endif /* ifdef __x86_64__ */ -#endif /* ifdef inhibit_libc */ |