Imported Upstream version 1.1~hg20130323upstream/1.1_hg20130323

1 files changed, 124 insertions, 0 deletions

diff --git a/src/pkg/runtime/signal_arm.c b/src/pkg/runtime/signal_arm.c
new file mode 100644
index 000000000..adf61de6b
--- /dev/null
+++ b/src/pkg/runtime/signal_arm.c
@@ -0,0 +1,124 @@
+// Copyright 2009 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 darwin freebsd linux netbsd openbsd
+
+#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("trap    %x\n", SIG_TRAP(info, ctxt));
+	runtime·printf("error   %x\n", SIG_ERROR(info, ctxt));
+	runtime·printf("oldmask %x\n", SIG_OLDMASK(info, ctxt));
+	runtime·printf("r0      %x\n", SIG_R0(info, ctxt));
+	runtime·printf("r1      %x\n", SIG_R1(info, ctxt));
+	runtime·printf("r2      %x\n", SIG_R2(info, ctxt));
+	runtime·printf("r3      %x\n", SIG_R3(info, ctxt));
+	runtime·printf("r4      %x\n", SIG_R4(info, ctxt));
+	runtime·printf("r5      %x\n", SIG_R5(info, ctxt));
+	runtime·printf("r6      %x\n", SIG_R6(info, ctxt));
+	runtime·printf("r7      %x\n", SIG_R7(info, ctxt));
+	runtime·printf("r8      %x\n", SIG_R8(info, ctxt));
+	runtime·printf("r9      %x\n", SIG_R9(info, ctxt));
+	runtime·printf("r10     %x\n", SIG_R10(info, ctxt));
+	runtime·printf("fp      %x\n", SIG_FP(info, ctxt));
+	runtime·printf("ip      %x\n", SIG_IP(info, ctxt));
+	runtime·printf("sp      %x\n", SIG_SP(info, ctxt));
+	runtime·printf("lr      %x\n", SIG_LR(info, ctxt));
+	runtime·printf("pc      %x\n", SIG_PC(info, ctxt));
+	runtime·printf("cpsr    %x\n", SIG_CPSR(info, ctxt));
+	runtime·printf("fault   %x\n", SIG_FAULT(info, ctxt));
+}
+
+void
+runtime·sighandler(int32 sig, Siginfo *info, void *ctxt, G *gp)
+{
+	SigTab *t;
+	bool crash;
+
+	if(sig == SIGPROF) {
+		if(gp != m->g0 && gp != m->gsignal)
+			runtime·sigprof((uint8*)SIG_PC(info, ctxt), (uint8*)SIG_SP(info, ctxt), (uint8*)SIG_LR(info, ctxt), gp);
+		return;
+	}
+
+	t = &runtime·sigtab[sig];
+	if(SIG_CODE0(info, ctxt) != SI_USER && (t->flags & SigPanic)) {
+		if(gp == nil || gp == m->g0)
+			goto Throw;
+
+		// 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 lr, and pc to pretend the panicking
+		// function calls sigpanic directly.
+		// Always save LR 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) -= 4;
+		*(uint32*)SIG_SP(info, ctxt) = SIG_LR(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_LR(info, ctxt) = gp->sigpc;
+		// In case we are panicking from external C code
+		SIG_R10(info, ctxt) = (uintptr)gp;
+		SIG_R9(info, ctxt) = (uintptr)m;
+		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;
+
+Throw:
+	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(m->lockedg != nil && m->ncgo > 0 && gp == m->g0) {
+		runtime·printf("signal arrived during cgo execution\n");
+		gp = m->lockedg;
+	}
+	runtime·printf("\n");
+
+	if(runtime·gotraceback(&crash)){
+		runtime·traceback((void*)SIG_PC(info, ctxt), (void*)SIG_SP(info, ctxt), (void*)SIG_LR(info, ctxt), gp);
+		runtime·tracebackothers(gp);
+		runtime·printf("\n");
+		runtime·dumpregs(info, ctxt);
+	}
+	
+	if(crash)
+		runtime·crash();
+
+	runtime·exit(2);
+}