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Lines 59-108
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| 59 |
/* Do code reading to identify a signal frame, and set the frame |
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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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state data appropriately. See unwind-dw2.c for the structs. */ |
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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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#define MD_FALLBACK_FRAME_STATE_FOR(CONTEXT, FS, SUCCESS) \ |
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do { \ |
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unsigned int *pc_ = (CONTEXT)->ra; \ |
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struct sigcontext *sc_; \ |
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long new_cfa_, i_; \ |
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\ |
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if (pc_[0] != 0x47fe0410 /* mov $30,$16 */ \ |
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|| pc_[2] != 0x00000083 /* callsys */) \ |
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break; \ |
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if (pc_[1] == 0x201f0067) /* lda $0,NR_sigreturn */ \ |
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sc_ = (CONTEXT)->cfa; \ |
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else if (pc_[1] == 0x201f015f) /* lda $0,NR_rt_sigreturn */ \ |
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{ \ |
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struct rt_sigframe { \ |
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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_ = &rt_->uc.uc_mcontext; \ |
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} \ |
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else \ |
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break; \ |
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new_cfa_ = sc_->sc_regs[30]; \ |
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(FS)->cfa_how = CFA_REG_OFFSET; \ |
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(FS)->cfa_reg = 30; \ |
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(FS)->cfa_offset = new_cfa_ - (long) (CONTEXT)->cfa; \ |
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for (i_ = 0; i_ < 30; ++i_) \ |
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{ \ |
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(FS)->regs.reg[i_].how = REG_SAVED_OFFSET; \ |
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(FS)->regs.reg[i_].loc.offset \ |
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= (long)&sc_->sc_regs[i_] - new_cfa_; \ |
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} \ |
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for (i_ = 0; i_ < 31; ++i_) \ |
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{ \ |
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(FS)->regs.reg[i_+32].how = REG_SAVED_OFFSET; \ |
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(FS)->regs.reg[i_+32].loc.offset \ |
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= (long)&sc_->sc_fpregs[i_] - new_cfa_; \ |
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} \ |
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(FS)->regs.reg[31].how = REG_SAVED_OFFSET; \ |
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(FS)->regs.reg[31].loc.offset = (long)&sc_->sc_pc - new_cfa_; \ |
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(FS)->retaddr_column = 31; \ |
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goto SUCCESS; \ |
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} while (0) |
