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Viewing changes to src/pkg/runtime/signal_arm.c

  • Committer: Package Import Robot
  • Author(s): Adam Conrad
  • Date: 2013-07-08 05:52:37 UTC
  • mfrom: (29.1.1 sid)
  • Revision ID: package-import@ubuntu.com-20130708055237-at01839e0hp8z3ni
Tags: 2:1.1-1ubuntu1
016-armhf-elf-header.patch: Use correct ELF header for armhf binaries.

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src/pkg/runtime/signal_arm.c
 
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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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// +build darwin freebsd linux netbsd openbsd
 
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#include "runtime.h"
 
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#include "defs_GOOS_GOARCH.h"
 
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#include "os_GOOS.h"
 
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#include "signal_GOOS_GOARCH.h"
 
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#include "signals_GOOS.h"
 
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void
 
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runtime·dumpregs(Siginfo *info, void *ctxt)
 
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{
 
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        USED(info);
 
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        USED(ctxt);
 
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        runtime·printf("trap    %x\n", SIG_TRAP(info, ctxt));
 
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        runtime·printf("error   %x\n", SIG_ERROR(info, ctxt));
 
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        runtime·printf("oldmask %x\n", SIG_OLDMASK(info, ctxt));
 
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        runtime·printf("r0      %x\n", SIG_R0(info, ctxt));
 
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        runtime·printf("r1      %x\n", SIG_R1(info, ctxt));
 
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        runtime·printf("r2      %x\n", SIG_R2(info, ctxt));
 
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        runtime·printf("r3      %x\n", SIG_R3(info, ctxt));
 
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        runtime·printf("r4      %x\n", SIG_R4(info, ctxt));
 
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        runtime·printf("r5      %x\n", SIG_R5(info, ctxt));
 
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        runtime·printf("r6      %x\n", SIG_R6(info, ctxt));
 
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        runtime·printf("r7      %x\n", SIG_R7(info, ctxt));
 
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        runtime·printf("r8      %x\n", SIG_R8(info, ctxt));
 
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        runtime·printf("r9      %x\n", SIG_R9(info, ctxt));
 
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        runtime·printf("r10     %x\n", SIG_R10(info, ctxt));
 
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        runtime·printf("fp      %x\n", SIG_FP(info, ctxt));
 
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        runtime·printf("ip      %x\n", SIG_IP(info, ctxt));
 
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        runtime·printf("sp      %x\n", SIG_SP(info, ctxt));
 
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        runtime·printf("lr      %x\n", SIG_LR(info, ctxt));
 
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        runtime·printf("pc      %x\n", SIG_PC(info, ctxt));
 
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        runtime·printf("cpsr    %x\n", SIG_CPSR(info, ctxt));
 
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        runtime·printf("fault   %x\n", SIG_FAULT(info, ctxt));
 
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}
 
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void
 
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runtime·sighandler(int32 sig, Siginfo *info, void *ctxt, G *gp)
 
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{
 
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        SigTab *t;
 
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        bool crash;
 
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        if(sig == SIGPROF) {
 
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                if(gp != m->g0 && gp != m->gsignal)
 
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                        runtime·sigprof((uint8*)SIG_PC(info, ctxt), (uint8*)SIG_SP(info, ctxt), (uint8*)SIG_LR(info, ctxt), gp);
 
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                return;
 
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        }
 
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        t = &runtime·sigtab[sig];
 
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        if(SIG_CODE0(info, ctxt) != SI_USER && (t->flags & SigPanic)) {
 
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                if(gp == nil || gp == m->g0)
 
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                        goto Throw;
 
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                // Make it look like a call to the signal func.
 
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                // Have to pass arguments out of band since
 
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                // augmenting the stack frame would break
 
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                // the unwinding code.
 
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                gp->sig = sig;
 
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                gp->sigcode0 = SIG_CODE0(info, ctxt);
 
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                gp->sigcode1 = SIG_FAULT(info, ctxt);
 
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                gp->sigpc = SIG_PC(info, ctxt);
 
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                // We arrange lr, and pc to pretend the panicking
 
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                // function calls sigpanic directly.
 
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                // Always save LR to stack so that panics in leaf
 
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                // functions are correctly handled. This smashes
 
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                // the stack frame but we're not going back there
 
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                // anyway.
 
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                SIG_SP(info, ctxt) -= 4;
 
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                *(uint32*)SIG_SP(info, ctxt) = SIG_LR(info, ctxt);
 
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                // Don't bother saving PC if it's zero, which is
 
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                // probably a call to a nil func: the old link register
 
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                // is more useful in the stack trace.
 
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                if(gp->sigpc != 0)
 
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                        SIG_LR(info, ctxt) = gp->sigpc;
 
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                // In case we are panicking from external C code
 
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                SIG_R10(info, ctxt) = (uintptr)gp;
 
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                SIG_R9(info, ctxt) = (uintptr)m;
 
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                SIG_PC(info, ctxt) = (uintptr)runtime·sigpanic;
 
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                return;
 
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        }
 
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        if(SIG_CODE0(info, ctxt) == SI_USER || (t->flags & SigNotify))
 
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                if(runtime·sigsend(sig))
 
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                        return;
 
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        if(t->flags & SigKill)
 
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                runtime·exit(2);
 
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        if(!(t->flags & SigThrow))
 
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                return;
 
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Throw:
 
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        if(runtime·panicking)   // traceback already printed
 
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                runtime·exit(2);
 
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        runtime·panicking = 1;
 
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        if(sig < 0 || sig >= NSIG)
 
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                runtime·printf("Signal %d\n", sig);
 
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        else
 
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                runtime·printf("%s\n", runtime·sigtab[sig].name);
 
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        runtime·printf("PC=%x\n", SIG_PC(info, ctxt));
 
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        if(m->lockedg != nil && m->ncgo > 0 && gp == m->g0) {
 
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                runtime·printf("signal arrived during cgo execution\n");
 
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                gp = m->lockedg;
 
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        }
 
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        runtime·printf("\n");
 
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        if(runtime·gotraceback(&crash)){
 
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                runtime·traceback((void*)SIG_PC(info, ctxt), (void*)SIG_SP(info, ctxt), (void*)SIG_LR(info, ctxt), gp);
 
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                runtime·tracebackothers(gp);
 
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                runtime·printf("\n");
 
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                runtime·dumpregs(info, ctxt);
 
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        }
 
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        if(crash)
 
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                runtime·crash();
 
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        runtime·exit(2);
 
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}