77ec9b6369
Do it all at once in preparation for Go 1.18 support. To make this commit, I've simply modified the `fmt-check` Makefile target to rewrite files instead of listing the differences. So this is a fully mechanical change, it should not have introduced any errors.
81 строка
1,8 КиБ
Go
81 строка
1,8 КиБ
Go
//go:build baremetal
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// +build baremetal
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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 _heap_start
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var heapStartSymbol [0]byte
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//go:extern _heap_end
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var heapEndSymbol [0]byte
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//go:extern _globals_start
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var globalsStartSymbol [0]byte
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//go:extern _globals_end
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var globalsEndSymbol [0]byte
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//go:extern _stack_top
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var stackTopSymbol [0]byte
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var (
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heapStart = uintptr(unsafe.Pointer(&heapStartSymbol))
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heapEnd = uintptr(unsafe.Pointer(&heapEndSymbol))
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globalsStart = uintptr(unsafe.Pointer(&globalsStartSymbol))
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globalsEnd = uintptr(unsafe.Pointer(&globalsEndSymbol))
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stackTop = uintptr(unsafe.Pointer(&stackTopSymbol))
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)
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// growHeap tries to grow the heap size. It returns true if it succeeds, false
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// otherwise.
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func growHeap() bool {
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// On baremetal, there is no way the heap can be grown.
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return false
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}
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//export malloc
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func libc_malloc(size uintptr) unsafe.Pointer {
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return alloc(size, nil)
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}
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//export free
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func libc_free(ptr unsafe.Pointer) {
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free(ptr)
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}
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//export runtime_putchar
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func runtime_putchar(c byte) {
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putchar(c)
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}
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//go:linkname syscall_Exit syscall.Exit
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func syscall_Exit(code int) {
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exit(code)
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}
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const baremetal = true
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// timeOffset is how long the monotonic clock started after the Unix epoch. It
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// should be a positive integer under normal operation or zero when it has not
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// been set.
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var timeOffset int64
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//go:linkname now time.now
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func now() (sec int64, nsec int32, mono int64) {
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mono = nanotime()
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sec = (mono + timeOffset) / (1000 * 1000 * 1000)
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nsec = int32((mono + timeOffset) - sec*(1000*1000*1000))
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return
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}
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// AdjustTimeOffset adds the given offset to the built-in time offset. A
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// positive value adds to the time (skipping some time), a negative value moves
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// the clock into the past.
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func AdjustTimeOffset(offset int64) {
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// TODO: do this atomically?
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timeOffset += offset
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}
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