42 lines
689 B
Go
42 lines
689 B
Go
//go:build unix && !disable_jit
|
|
|
|
package randomx
|
|
|
|
import (
|
|
"golang.org/x/sys/unix"
|
|
"unsafe"
|
|
)
|
|
|
|
func (f ProgramFunc) Execute(rl *RegisterLine) {
|
|
memoryPtr := &f
|
|
fun := *(*func(rl *RegisterLine))(unsafe.Pointer(&memoryPtr))
|
|
|
|
fun(rl)
|
|
}
|
|
|
|
func (f ProgramFunc) Close() error {
|
|
return unix.Munmap(f)
|
|
}
|
|
|
|
func mapProgram(program []byte) ProgramFunc {
|
|
execFunc, err := unix.Mmap(
|
|
-1,
|
|
0,
|
|
len(program),
|
|
unix.PROT_READ|unix.PROT_WRITE|unix.PROT_EXEC,
|
|
unix.MAP_PRIVATE|unix.MAP_ANONYMOUS)
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
|
|
copy(execFunc, program)
|
|
|
|
// Remove PROT_WRITE
|
|
err = unix.Mprotect(execFunc, unix.PROT_READ|unix.PROT_EXEC)
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
|
|
return execFunc
|
|
}
|