3392827c3e
This is not very useful in itself, but makes it possible to detect this address in the output. See the next commit. This adds around 50 bytes to each binary (except for AVR and wasm). This is unfortunate, but I think this feature is quite useful still. A future enhancement might be to create a build tag for extended panic information that's not set by default.
43 строки
1 КиБ
Go
43 строки
1 КиБ
Go
//go:build tinygo.riscv
|
|
|
|
package runtime
|
|
|
|
import "device/riscv"
|
|
|
|
const deferExtraRegs = 0
|
|
|
|
const callInstSize = 4 // 8 without relaxation, maybe 4 with relaxation
|
|
|
|
// RISC-V has a maximum alignment of 16 bytes (both for RV32 and for RV64).
|
|
// Source: https://riscv.org/wp-content/uploads/2015/01/riscv-calling.pdf
|
|
func align(ptr uintptr) uintptr {
|
|
return (ptr + 15) &^ 15
|
|
}
|
|
|
|
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 uintptr
|
|
|
|
//go:linkname procPin sync/atomic.runtime_procPin
|
|
func procPin() {
|
|
procPinnedMask = riscv.DisableInterrupts()
|
|
}
|
|
|
|
//go:linkname procUnpin sync/atomic.runtime_procUnpin
|
|
func procUnpin() {
|
|
riscv.EnableInterrupts(procPinnedMask)
|
|
}
|
|
|
|
func waitForEvents() {
|
|
mask := riscv.DisableInterrupts()
|
|
if !runqueue.Empty() {
|
|
riscv.Asm("wfi")
|
|
}
|
|
riscv.EnableInterrupts(mask)
|
|
}
|