// Make it look the like faulting PC called sigpanic.
		c.set_ra(uint64(pc))
	}

	// In case we are panicking from external C code
	c.set_gp(uint64(uintptr(unsafe.Pointer(gp))))
	c.set_pc(uint64(abi.FuncPCABIInternal(sigpanic)))
}

func (c *sigctxt) pushCall(targetPC, resumePC uintptr) {
	// Push the LR to stack, as we'll clobber it in order to
	// push the call. The function being pushed is responsible

		// Make it look the like faulting PC called sigpanic.
		c.set_link(uint32(pc))
	}

	// In case we are panicking from external C code
	c.set_r30(uint32(uintptr(unsafe.Pointer(gp))))
	c.set_pc(uint32(abi.FuncPCABIInternal(sigpanic)))
}

func (c *sigctxt) pushCall(targetPC, resumePC uintptr) {
	// Push the LR to stack, as we'll clobber it in order to
	// push the call. The function being pushed is responsible

		skip       = pcBuf[0]
		// skipOrAdd skips or appends retPC to newPCBuf and returns true if more
		// pcs can be added.
		skipOrAdd = func(retPC uintptr) bool {
			if skip > 0 {
				skip--
			} else if n < len(dst) {
				dst[n] = retPC
				n++
			}
			return n < len(dst)
		}
	)

outer:
	for _, retPC := range pcBuf[1:] {
		callPC := retPC - 1
		fi := findfunc(callPC)
		if !fi.valid() {

	}

	// In case we are panicking from external C code
	sigpanicPC := uint64(abi.FuncPCABIInternal(sigpanic))
	c.set_r28(sigpanicPC >> 32 << 32) // RSB register
	c.set_r30(uint64(uintptr(unsafe.Pointer(gp))))
	c.set_pc(sigpanicPC)
}

func (c *sigctxt) pushCall(targetPC, resumePC uintptr) {
	// Push the LR to stack, as we'll clobber it in order to
	// push the call. The function being pushed is responsible

	var info systeminfo
	stdcall1(_GetSystemInfo, uintptr(unsafe.Pointer(&info)))
	return int32(info.dwnumberofprocessors)
}

type ContextStub struct {
	context
}

func (c ContextStub) GetPC() uintptr {
	return c.ip()
}

func NewContextStub() *ContextStub {
	var ctx context
	ctx.set_ip(getcallerpc())
	ctx.set_sp(getcallersp())
	ctx.set_fp(getcallerfp())
	return &ContextStub{ctx}

func (c *sigctxt) oldmask() uint32 { return 0 }

func (c *sigctxt) sigcode() uint32 { return uint32(c.info.si_code) }
func (c *sigctxt) sigaddr() uint32 { return uint32(c.info.si_addr) }

func (c *sigctxt) set_pc(x uint32)  { c.regs().__gregs[15] = x }
func (c *sigctxt) set_sp(x uint32)  { c.regs().__gregs[13] = x }
func (c *sigctxt) set_lr(x uint32)  { c.regs().__gregs[14] = x }

func (c *sigctxt) oldmask() uint32 { return c.regs().oldmask }

func (c *sigctxt) sigcode() uint32 { return uint32(c.info.si_code) }
func (c *sigctxt) sigaddr() uint32 { return c.info.si_addr }

func (c *sigctxt) set_pc(x uint32)  { c.regs().pc = x }
func (c *sigctxt) set_sp(x uint32)  { c.regs().sp = x }
func (c *sigctxt) set_lr(x uint32)  { c.regs().lr = x }
func (c *sigctxt) set_r10(x uint32) { c.regs().r10 = x }

//
// (Copied from golang.org/x/telemetry/crashmonitor.parseStackPCs.)
func parseStackPCs(crash string) ([]uintptr, error) {
	// getPC parses the PC out of a line of the form:
	//     \tFILE:LINE +0xRELPC sp=... fp=... pc=...
	getPC := func(line string) (uint64, error) {
		_, pcstr, ok := strings.Cut(line, " pc=") // e.g. pc=0x%x
		if !ok {
			return 0, fmt.Errorf("no pc= for stack frame: %s", line)

func (c *sigctxt) oldmask() uint32 { return 0 }

func (c *sigctxt) sigcode() uint32 { return uint32(c.info._code) }
func (c *sigctxt) sigaddr() uint32 { return uint32(c.info._reason) }

func (c *sigctxt) set_pc(x uint32)  { c.regs().__gregs[_REG_R15] = x }
func (c *sigctxt) set_sp(x uint32)  { c.regs().__gregs[_REG_R13] = x }
func (c *sigctxt) set_lr(x uint32)  { c.regs().__gregs[_REG_R14] = x }

		if pc != 0 {
			if usesLR {
				c.setlr(pc)
			} else {
				sp -= goarch.PtrSize
				*(*uintptr)(unsafe.Pointer(sp)) = pc
				c.setsp(sp)
			}
		}
		if usesLR {
			c.setpc(abi.FuncPCABI0(sigpanictramp))
		} else {
			c.setpc(abi.FuncPCABI0(sigpanic0))
		}
		return _NCONT
	}
	if flags&_SigNotify != 0 {
		if ignoredNote(note) {
			return _NCONT
		}
		if sendNote(note) {
			return _NCONT