54 строки
1 КиБ
Go
54 строки
1 КиБ
Go
// +build cortexm
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package runtime
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import (
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"unsafe"
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)
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//go:extern _sbss
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var _sbss [0]byte
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//go:extern _ebss
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var _ebss [0]byte
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//go:extern _sdata
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var _sdata [0]byte
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//go:extern _sidata
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var _sidata [0]byte
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//go:extern _edata
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var _edata [0]byte
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func preinit() {
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// Initialize .bss: zero-initialized global variables.
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ptr := unsafe.Pointer(&_sbss)
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for ptr != unsafe.Pointer(&_ebss) {
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*(*uint32)(ptr) = 0
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ptr = unsafe.Pointer(uintptr(ptr) + 4)
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}
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// Initialize .data: global variables initialized from flash.
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src := unsafe.Pointer(&_sidata)
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dst := unsafe.Pointer(&_sdata)
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for dst != unsafe.Pointer(&_edata) {
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*(*uint32)(dst) = *(*uint32)(src)
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dst = unsafe.Pointer(uintptr(dst) + 4)
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src = unsafe.Pointer(uintptr(src) + 4)
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}
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}
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// The stack layout at the moment an interrupt occurs.
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// Registers can be accessed if the stack pointer is cast to a pointer to this
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// struct.
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type interruptStack struct {
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R0 uintptr
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R1 uintptr
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R2 uintptr
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R3 uintptr
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R12 uintptr
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LR uintptr
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PC uintptr
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PSR uintptr
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}
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