mirror of
https://github.com/tinygo-org/tinygo.git
synced 2026-08-05 03:27:48 +00:00
Ayke van Laethem
611bca39ab
Let the standard library think that it is compiling for js/wasm. The most correct way of supporting bare metal Cortex-M targets would be using the 'arm' build tag and specifying no OS or an 'undefined' OS (perhaps GOOS=noos?). However, there is no build tag for specifying no OS at all, the closest possible is GOOS=js which makes very few assumptions. Sadly GOOS=js also makes some assumptions: it assumes to be running with GOARCH=wasm. This would not be such a problem, just add js, wasm and arm as build tags. However, having two GOARCH build tags leads to an error in internal/cpu: it defines variables for both architectures which then conflict. To work around these problems, the 'arm' target has been renamed to 'tinygo.arm', which should work around these problems. In the future, a GOOS=noos (or similar) should be added which can work with any architecture and doesn't implement OS-specific stuff.
56 lines
894 B
Go
56 lines
894 B
Go
// +build wasm,!tinygo.arm,!avr
|
|
|
|
package runtime
|
|
|
|
type timeUnit int64
|
|
|
|
const tickMicros = 1
|
|
|
|
var timestamp timeUnit
|
|
|
|
// CommonWA: io_get_stdout
|
|
func _Cfunc_io_get_stdout() int32
|
|
|
|
// CommonWA: resource_write
|
|
func _Cfunc_resource_write(id int32, ptr *uint8, len int32) int32
|
|
|
|
var stdout int32
|
|
|
|
func init() {
|
|
stdout = _Cfunc_io_get_stdout()
|
|
}
|
|
|
|
//go:export _start
|
|
func _start() {
|
|
initAll()
|
|
}
|
|
|
|
//go:export cwa_main
|
|
func cwa_main() {
|
|
initAll() // _start is not called by olin/cwa so has to be called here
|
|
mainWrapper()
|
|
}
|
|
|
|
func putchar(c byte) {
|
|
_Cfunc_resource_write(stdout, &c, 1)
|
|
}
|
|
|
|
func sleepTicks(d timeUnit) {
|
|
// TODO: actually sleep here for the given time.
|
|
timestamp += d
|
|
}
|
|
|
|
func ticks() timeUnit {
|
|
return timestamp
|
|
}
|
|
|
|
// Align on word boundary.
|
|
func align(ptr uintptr) uintptr {
|
|
return (ptr + 3) &^ 3
|
|
}
|
|
|
|
// Abort executes the wasm 'unreachable' instruction.
|
|
func abort() {
|
|
trap()
|
|
}
|