[dev.garbage] all: merge default (f38460037b72) into dev.garbage

This is the revision that dev.cc is branched from.

LGTM=austin
R=austin
CC=golang-codereviews
https://codereview.appspot.com/169590043

1 files changed, 137 insertions, 0 deletions

diff --git a/src/runtime/signal_power64x.c b/src/runtime/signal_power64x.c
new file mode 100644
index 000000000..89c5c7848
--- /dev/null
+++ b/src/runtime/signal_power64x.c
@@ -0,0 +1,137 @@
+// 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);
+}