1 files changed, 131 insertions, 0 deletions
diff --git a/src/pkg/runtime/os_plan9_386.c b/src/pkg/runtime/os_plan9_386.c
new file mode 100644
index 000000000..3396e44e7
--- /dev/null
+++ b/src/pkg/runtime/os_plan9_386.c
@@ -0,0 +1,131 @@
+// Copyright 2010 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. 
+
+#include "runtime.h"
+#include "defs_GOOS_GOARCH.h"
+#include "os_GOOS.h"
+#include "signals_GOOS.h"
+
+void
+runtime·dumpregs(Ureg *u)
+{
+	runtime·printf("ax	%X\n", u->ax);
+	runtime·printf("bx	%X\n", u->bx);
+	runtime·printf("cx	%X\n", u->cx);
+	runtime·printf("dx	%X\n", u->dx);
+	runtime·printf("di	%X\n", u->di);
+	runtime·printf("si	%X\n", u->si);
+	runtime·printf("bp	%X\n", u->bp);
+	runtime·printf("sp	%X\n", u->sp);
+	runtime·printf("pc	%X\n", u->pc);
+	runtime·printf("flags	%X\n", u->flags);
+	runtime·printf("cs	%X\n", u->cs);
+	runtime·printf("fs	%X\n", u->fs);
+	runtime·printf("gs	%X\n", u->gs);
+}
+
+int32
+runtime·sighandler(void *v, int8 *s, G *gp)
+{
+	bool crash;
+	Ureg *ureg;
+	uintptr *sp;
+	SigTab *sig, *nsig;
+	int32 len, i;
+
+	if(!s)
+		return NCONT;
+			
+	len = runtime·findnull((byte*)s);
+	if(len <= 4 || runtime·mcmp((byte*)s, (byte*)"sys:", 4) != 0)
+		return NDFLT;
+
+	nsig = nil;
+	sig = runtime·sigtab;
+	for(i=0; i < NSIG; i++) {
+		if(runtime·strstr((byte*)s, (byte*)sig->name)) {
+			nsig = sig;
+			break;
+		}
+		sig++;
+	}
+
+	if(nsig == nil)
+		return NDFLT;
+
+	ureg = v;
+	if(nsig->flags & SigPanic) {
+		if(gp == nil || m->notesig == 0)
+			goto Throw;
+
+		// Save error string from sigtramp's stack,
+		// into gsignal->sigcode0, so we can reliably
+		// access it from the panic routines.
+		if(len > ERRMAX)
+			len = ERRMAX;
+		runtime·memmove((void*)m->notesig, (void*)s, len);
+
+		gp->sig = i;
+		gp->sigpc = ureg->pc;
+
+		// Only push runtime·sigpanic if ureg->pc != 0.
+		// If ureg->pc == 0, probably panicked because of a
+		// call to a nil func.  Not pushing that onto sp will
+		// make the trace look like a call to runtime·sigpanic instead.
+		// (Otherwise the trace will end at runtime·sigpanic and we
+		// won't get to see who faulted.)
+		if(ureg->pc != 0) {
+			sp = (uintptr*)ureg->sp;
+			*--sp = ureg->pc;
+			ureg->sp = (uint32)sp;
+		}
+		ureg->pc = (uintptr)runtime·sigpanic;
+		return NCONT;
+	}
+
+	if(!(nsig->flags & SigThrow))
+		return NDFLT;
+
+Throw:
+	runtime·startpanic();
+
+	runtime·printf("%s\n", s);
+	runtime·printf("PC=%X\n", ureg->pc);
+	runtime·printf("\n");
+
+	if(runtime·gotraceback(&crash)) {
+		runtime·traceback((void*)ureg->pc, (void*)ureg->sp, 0, gp);
+		runtime·tracebackothers(gp);
+		runtime·dumpregs(ureg);
+	}
+	
+	if(crash)
+		runtime·crash();
+
+	runtime·goexitsall("");
+	runtime·exits(s);
+
+	return 0;
+}
+
+
+void
+runtime·sigenable(uint32 sig)
+{
+	USED(sig);
+}
+
+void
+runtime·sigdisable(uint32 sig)
+{
+	USED(sig);
+}
+
+void
+runtime·resetcpuprofiler(int32 hz)
+{
+	// TODO: Enable profiling interrupts.
+	
+	m->profilehz = hz;
+}