CALL	AX

	// should never return
	CALL	runtime·abort(SB)
	UNDEF

/*
 * support for morestack
 */

// Called during function prolog when more stack is needed.
//
// The traceback routines see morestack on a g0 as being
// the top of a stack (for example, morestack calling newstack
// calling the scheduler calling newm calling gc), so we must

// the calling Go function that it should not jump
// to deferreturn.
// in asm_*.s
func return0()

// in asm_*.s
// not called directly; definitions here supply type information for traceback.
// These must have the same signature (arg pointer map) as reflectcall.
func call16(typ, fn, stackArgs unsafe.Pointer, stackArgsSize, stackRetOffset, frameSize uint32, regArgs *abi.RegArgs)

				var prologueEnd *obj.Prog
				// Save the link register and update the SP.  MOVDU is used unless
				// the frame size is too large.  The link register must be saved
				// even for non-empty leaf functions so that traceback works.
				if autosize >= -BIG && autosize <= BIG {
					// Use MOVDU to adjust R1 when saving R31, if autosize is small.
					q = obj.Appendp(q, c.newprog)
					q.As = AMOVD
					q.Pos = p.Pos

	}

	if fn == nil {
		throw("cgocall nil")
	}

	if raceenabled {
		racereleasemerge(unsafe.Pointer(&racecgosync))
	}

	mp := getg().m
	mp.ncgocall++

	// Reset traceback.
	mp.cgoCallers[0] = 0

	// Announce we are entering a system call
	// so that the scheduler knows to create another
	// M to run goroutines while we are in the
	// foreign code.
	//

			throw("markroot: bad index")
		}
		gp := work.stackRoots[i-work.baseStacks]

		// remember when we've first observed the G blocked
		// needed only to output in traceback
		status := readgstatus(gp) // We are not in a scan state
		if (status == _Gwaiting || status == _Gsyscall) && gp.waitsince == 0 {
			gp.waitsince = work.tstart
		}

	CALL	runtime·abort(SB)
	UNDEF

/*
 * support for morestack
 */

// Called during function prolog when more stack is needed.
// Caller has already loaded:
// R3 prolog's LR (R30)
//
// The traceback routines see morestack on a g0 as being
// the top of a stack (for example, morestack calling newstack
// calling the scheduler calling newm calling gc), so we must

		// timer). But it may have never interacted with the Go scheduler, or
		// never while profiling was active. To avoid double-counting, process
		// only signals from setitimer.
		//
		// When a custom cgo traceback function has been registered (on
		// platforms that support runtime.SetCgoTraceback), SIGPROF signals
		// delivered to a thread that cannot find a matching M do this check in

	setGCPhase(_GCmarktermination)

	work.heap1 = gcController.heapLive.Load()
	startTime := nanotime()

	mp := acquirem()
	mp.preemptoff = "gcing"
	mp.traceback = 2
	curgp := mp.curg
	// N.B. The execution tracer is not aware of this status
	// transition and handles it specially based on the
	// wait reason.
	casGToWaitingForGC(curgp, _Grunning, waitReasonGarbageCollection)

		return nil, err
	}

	cleanupDuplicateLocations(p)
	return p, nil
}

// parseThreadSample parses a symbolized or unsymbolized stack trace.
// Returns the first line after the traceback, the sample (or nil if
// it hits a 'same-as-previous' marker) and an error.
func parseThreadSample(s *bufio.Scanner) (nextl string, addrs []uint64, err error) {
	var line string
	sameAsPrevious := false
	for s.Scan() {

	// pcBuf[1:] after inline expansion.
	logicalStackSentinel = ^uintptr(0)
)

// traceStack captures a stack trace from a goroutine and registers it in the trace
// stack table. It then returns its unique ID. If gp == nil, then traceStack will
// attempt to use the current execution context.
//
// skip controls the number of leaf frames to omit in order to hide tracer internals