fn = abi.FuncPCABI0(sigtramp)
	}
	sa.sa_sigaction = fn
	sigaction(i, &sa, nil)
}

//go:nosplit
//go:nowritebarrierrec
func setsigstack(i uint32) {
	throw("setsigstack")
}

//go:nosplit
//go:nowritebarrierrec
func getsig(i uint32) uintptr {
	var sa sigactiont
	sigaction(i, nil, &sa)
	return sa.sa_sigaction
}

		fn = abi.FuncPCABI0(sigtramp)
	}
	sa.sa_sigaction = fn
	sigaction(i, &sa, nil)
}

//go:nosplit
//go:nowritebarrierrec
func setsigstack(i uint32) {
	throw("setsigstack")
}

//go:nosplit
//go:nowritebarrierrec
func getsig(i uint32) uintptr {
	var sa sigactiont
	sigaction(i, nil, &sa)
	return sa.sa_sigaction
}

		fn = uintptr(unsafe.Pointer(&sigtramp))
	}
	sa.sa_handler = fn
	sigaction(uintptr(i), &sa, nil)

}

//go:nosplit
//go:nowritebarrierrec
func setsigstack(i uint32) {
	var sa sigactiont
	sigaction(uintptr(i), nil, &sa)
	if sa.sa_flags&_SA_ONSTACK != 0 {
		return
	}
	sa.sa_flags |= _SA_ONSTACK
	sigaction(uintptr(i), &sa, nil)
}

//go:nosplit

	RET

// Careful, this is called by __sighndlr, a libc function. We must preserve
// registers as per AMD 64 ABI.
TEXT runtime·sigtramp(SB),NOSPLIT|TOPFRAME|NOFRAME,$0
	// Note that we are executing on altsigstack here, so we have
	// more stack available than NOSPLIT would have us believe.
	// To defeat the linker, we make our own stack frame with
	// more space:
	SUBQ    $168, SP
	// save registers
	MOVQ    BX, 24(SP)

TEXT sigtramp<>(SB),NOSPLIT|NOFRAME|TOPFRAME,$0
	MOVD	LR, R0
	MOVD	R0, 16(R1)
	// initialize essential registers (just in case)
	BL	runtime·reginit(SB)

	// Note that we are executing on altsigstack here, so we have
	// more stack available than NOSPLIT would have us believe.
	// To defeat the linker, we make our own stack frame with
	// more space.
	SUB	$144+FIXED_FRAME, R1

	// Save registers