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// Copyright 2014 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// +build linux
// +build power64 power64le
#include "runtime.h"
#include "defs_GOOS_GOARCH.h"
#include "os_GOOS.h"
#include "signal_GOOS_GOARCH.h"
#include "signals_GOOS.h"
void
runtime·dumpregs(Siginfo *info, void *ctxt)
{
USED(info); USED(ctxt);
runtime·printf("r0 %X\t", SIG_R0(info, ctxt));
runtime·printf("r1 %X\n", SIG_R1(info, ctxt));
runtime·printf("r2 %X\t", SIG_R2(info, ctxt));
runtime·printf("r3 %X\n", SIG_R3(info, ctxt));
runtime·printf("r4 %X\t", SIG_R4(info, ctxt));
runtime·printf("r5 %X\n", SIG_R5(info, ctxt));
runtime·printf("r6 %X\t", SIG_R6(info, ctxt));
runtime·printf("r7 %X\n", SIG_R7(info, ctxt));
runtime·printf("r8 %X\t", SIG_R8(info, ctxt));
runtime·printf("r9 %X\n", SIG_R9(info, ctxt));
runtime·printf("r10 %X\t", SIG_R10(info, ctxt));
runtime·printf("r11 %X\n", SIG_R11(info, ctxt));
runtime·printf("r12 %X\t", SIG_R12(info, ctxt));
runtime·printf("r13 %X\n", SIG_R13(info, ctxt));
runtime·printf("r14 %X\t", SIG_R14(info, ctxt));
runtime·printf("r15 %X\n", SIG_R15(info, ctxt));
runtime·printf("r16 %X\t", SIG_R16(info, ctxt));
runtime·printf("r17 %X\n", SIG_R17(info, ctxt));
runtime·printf("r18 %X\t", SIG_R18(info, ctxt));
runtime·printf("r19 %X\n", SIG_R19(info, ctxt));
runtime·printf("r20 %X\t", SIG_R20(info, ctxt));
runtime·printf("r21 %X\n", SIG_R21(info, ctxt));
runtime·printf("r22 %X\t", SIG_R22(info, ctxt));
runtime·printf("r23 %X\n", SIG_R23(info, ctxt));
runtime·printf("r24 %X\t", SIG_R24(info, ctxt));
runtime·printf("r25 %X\n", SIG_R25(info, ctxt));
runtime·printf("r26 %X\t", SIG_R26(info, ctxt));
runtime·printf("r27 %X\n", SIG_R27(info, ctxt));
runtime·printf("r28 %X\t", SIG_R28(info, ctxt));
runtime·printf("r29 %X\n", SIG_R29(info, ctxt));
runtime·printf("r30 %X\t", SIG_R30(info, ctxt));
runtime·printf("r31 %X\n", SIG_R31(info, ctxt));
runtime·printf("pc %X\t", SIG_PC(info, ctxt));
runtime·printf("ctr %X\n", SIG_CTR(info, ctxt));
runtime·printf("link %X\t", SIG_LINK(info, ctxt));
runtime·printf("xer %X\n", SIG_XER(info, ctxt));
runtime·printf("ccr %X\t", SIG_CCR(info, ctxt));
runtime·printf("trap %X\n", SIG_TRAP(info, ctxt));
}
void
runtime·sighandler(int32 sig, Siginfo *info, void *ctxt, G *gp)
{
SigTab *t;
bool crash;
if(sig == SIGPROF) {
runtime·sigprof((uint8*)SIG_PC(info, ctxt), (uint8*)SIG_SP(info, ctxt), (uint8*)SIG_LINK(info, ctxt), gp, g->m);
return;
}
t = &runtime·sigtab[sig];
if(SIG_CODE0(info, ctxt) != SI_USER && (t->flags & SigPanic)) {
// Make it look like a call to the signal func.
// Have to pass arguments out of band since
// augmenting the stack frame would break
// the unwinding code.
gp->sig = sig;
gp->sigcode0 = SIG_CODE0(info, ctxt);
gp->sigcode1 = SIG_FAULT(info, ctxt);
gp->sigpc = SIG_PC(info, ctxt);
// We arrange link, and pc to pretend the panicking
// function calls sigpanic directly.
// Always save LINK to stack so that panics in leaf
// functions are correctly handled. This smashes
// the stack frame but we're not going back there
// anyway.
SIG_SP(info, ctxt) -= sizeof(uintptr);
*(uintptr*)SIG_SP(info, ctxt) = SIG_LINK(info, ctxt);
// Don't bother saving PC if it's zero, which is
// probably a call to a nil func: the old link register
// is more useful in the stack trace.
if(gp->sigpc != 0)
SIG_LINK(info, ctxt) = gp->sigpc;
// In case we are panicking from external C code
SIG_R0(info, ctxt) = 0;
SIG_R30(info, ctxt) = (uintptr)gp;
SIG_PC(info, ctxt) = (uintptr)runtime·sigpanic;
return;
}
if(SIG_CODE0(info, ctxt) == SI_USER || (t->flags & SigNotify))
if(runtime·sigsend(sig))
return;
if(t->flags & SigKill)
runtime·exit(2);
if(!(t->flags & SigThrow))
return;
g->m->throwing = 1;
g->m->caughtsig = gp;
if(runtime·panicking) // traceback already printed
runtime·exit(2);
runtime·panicking = 1;
if(sig < 0 || sig >= NSIG)
runtime·printf("Signal %d\n", sig);
else
runtime·printf("%s\n", runtime·sigtab[sig].name);
runtime·printf("PC=%x\n", SIG_PC(info, ctxt));
if(g->m->lockedg != nil && g->m->ncgo > 0 && gp == g->m->g0) {
runtime·printf("signal arrived during cgo execution\n");
gp = g->m->lockedg;
}
runtime·printf("\n");
if(runtime·gotraceback(&crash)){
runtime·goroutineheader(gp);
runtime·traceback(SIG_PC(info, ctxt), SIG_SP(info, ctxt), SIG_LINK(info, ctxt), gp);
runtime·tracebackothers(gp);
runtime·printf("\n");
runtime·dumpregs(info, ctxt);
}
if(crash)
runtime·crash();
runtime·exit(2);
}
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