e2178ce682
The AVR backend has several critical atomics bugs. This change invokes libcalls for all atomic operations on AVR. Now `testdata/atomic.go` compiles and runs correctly.
37 строки
849 Б
Go
37 строки
849 Б
Go
//go:build avr
|
|
// +build avr
|
|
|
|
package runtime
|
|
|
|
import "runtime/interrupt"
|
|
|
|
const GOARCH = "arm" // avr pretends to be arm
|
|
|
|
// The bitness of the CPU (e.g. 8, 32, 64).
|
|
const TargetBits = 8
|
|
|
|
// Align on a word boundary.
|
|
func align(ptr uintptr) uintptr {
|
|
// No alignment necessary on the AVR.
|
|
return ptr
|
|
}
|
|
|
|
func getCurrentStackPointer() uintptr {
|
|
return uintptr(stacksave())
|
|
}
|
|
|
|
// The safest thing to do here would just be to disable interrupts for
|
|
// procPin/procUnpin. Note that a global variable is safe in this case, as any
|
|
// access to procPinnedMask will happen with interrupts disabled.
|
|
|
|
var procPinnedMask interrupt.State
|
|
|
|
//go:linkname procPin sync/atomic.runtime_procPin
|
|
func procPin() {
|
|
procPinnedMask = interrupt.Disable()
|
|
}
|
|
|
|
//go:linkname procUnpin sync/atomic.runtime_procUnpin
|
|
func procUnpin() {
|
|
interrupt.Restore(procPinnedMask)
|
|
}
|