27 lines
606 B
Go
27 lines
606 B
Go
|
//+build !windows
|
||
|
|
|
||
|
|
package monkey
|
||
|
|
|
||
|
|
import (
|
||
|
|
"syscall"
|
||
|
|
)
|
||
|
|
|
||
|
|
// this function is super unsafe
|
||
|
|
// aww yeah
|
||
|
|
// It copies a slice to a raw memory location, disabling all memory protection before doing so.
|
||
|
|
func copyToLocation(location uintptr, data []byte) {
|
||
|
|
f := rawMemoryAccess(location, len(data))
|
||
|
|
|
||
|
|
page := rawMemoryAccess(pageStart(location), syscall.Getpagesize())
|
||
|
|
err := syscall.Mprotect(page, syscall.PROT_READ|syscall.PROT_WRITE|syscall.PROT_EXEC)
|
||
|
|
if err != nil {
|
||
|
|
panic(err)
|
||
|
|
}
|
||
|
|
copy(f, data[:])
|
||
|
|
|
||
|
|
err = syscall.Mprotect(page, syscall.PROT_READ|syscall.PROT_EXEC)
|
||
|
|
if err != nil {
|
||
|
|
panic(err)
|
||
|
|
}
|
||
|
|
}
|