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// Copyright 2009 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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#include "runtime.h"
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#include "defs.h"
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#include "os.h"
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#include "signals.h"
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void
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dumpregs(Regs *r)
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{
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printf("rax %X\n", r->rax);
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printf("rbx %X\n", r->rbx);
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printf("rcx %X\n", r->rcx);
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printf("rdx %X\n", r->rdx);
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printf("rdi %X\n", r->rdi);
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printf("rsi %X\n", r->rsi);
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printf("rbp %X\n", r->rbp);
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printf("rsp %X\n", r->rsp);
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printf("r8 %X\n", r->r8 );
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printf("r9 %X\n", r->r9 );
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printf("r10 %X\n", r->r10);
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printf("r11 %X\n", r->r11);
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printf("r12 %X\n", r->r12);
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printf("r13 %X\n", r->r13);
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printf("r14 %X\n", r->r14);
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printf("r15 %X\n", r->r15);
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printf("rip %X\n", r->rip);
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printf("rflags %X\n", r->rflags);
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printf("cs %X\n", r->cs);
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printf("fs %X\n", r->fs);
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printf("gs %X\n", r->gs);
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}
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void
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sighandler(int32 sig, Siginfo *info, void *context)
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{
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Ucontext *uc;
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Mcontext *mc;
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Regs *r;
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if(panicking) // traceback already printed
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sys_Exit(2);
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panicking = 1;
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if(sig < 0 || sig >= NSIG){
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printf("Signal %d\n", sig);
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}else{
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printf("%s\n", sigtab[sig].name);
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}
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uc = context;
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mc = uc->uc_mcontext;
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r = &mc->ss;
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printf("Faulting address: %p\n", info->si_addr);
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printf("PC=%X\n", r->rip);
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printf("\n");
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if(gotraceback()){
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traceback((void*)r->rip, (void*)r->rsp, (void*)r->r15);
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tracebackothers((void*)r->r15);
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dumpregs(r);
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}
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sys·Breakpoint();
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sys_Exit(2);
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}
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void
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sigignore(int32, Siginfo*, void*)
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{
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}
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void
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signalstack(byte *p, int32 n)
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{
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StackT st;
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st.ss_sp = p;
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st.ss_size = n;
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st.ss_flags = 0;
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sigaltstack(&st, nil);
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}
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void
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initsig(void)
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{
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int32 i;
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static Sigaction sa;
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sa.sa_flags |= SA_SIGINFO|SA_ONSTACK;
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sa.sa_mask = 0; // 0xFFFFFFFFU;
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sa.sa_tramp = sigtramp; // sigtramp's job is to call into real handler
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for(i = 0; i<NSIG; i++) {
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if(sigtab[i].flags) {
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if(sigtab[i].flags & SigCatch) {
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sa.__sigaction_u.__sa_sigaction = sighandler;
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} else {
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sa.__sigaction_u.__sa_sigaction = sigignore;
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}
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if(sigtab[i].flags & SigRestart)
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sa.sa_flags |= SA_RESTART;
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else
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sa.sa_flags &= ~SA_RESTART;
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sigaction(i, &sa, nil);
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}
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}
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}
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