abb09e869e
The Cortex-M target isn't much changed, but much of the logic for the AVR stack switcher that was previously in assembly has now been moved to Go to make it more maintainable and in fact smaller in code size. Three functions (tinygo_getCurrentStackPointer, tinygo_switchToTask, tinygo_switchToScheduler) have been changed to one: tinygo_swapTask. This reduction in assembly code should make the code more maintainable and should make it easier to port stack switching to other architectures. I've also moved the assembly files to src/internal/task, which seems like a more appropriate location to me.
17 строки
443 Б
Go
17 строки
443 Б
Go
// +build scheduler.tasks
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package runtime
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import "internal/task"
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// getSystemStackPointer returns the current stack pointer of the system stack.
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// This is not necessarily the same as the current stack pointer.
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func getSystemStackPointer() uintptr {
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// TODO: this always returns the correct stack on Cortex-M, so don't bother
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// comparing against 0.
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sp := task.SystemStack()
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if sp == 0 {
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sp = getCurrentStackPointer()
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}
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return sp
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}
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