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Lines 221-280
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state data appropriately. See unwind-dw2.c for the structs. */ |
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state data appropriately. See unwind-dw2.c for the structs. */ |
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#ifdef IN_LIBGCC2 |
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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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#endif |
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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) |
