x/arch/x86/x86asm: endbr64 does not disassemble #46196
Description
What version of Go are you using (go version)?
$ go version go version go1.15.8 windows/amd64
Does this issue reproduce with the latest release?
Didn't check.
What operating system and processor architecture are you using (go env)?
windows, amd64
What did you do?
package main
import (
"golang.org/x/arch/x86/x86asm"
"log"
)
func main() {
bs := []byte{0xf3, 0x0f, 0x1e, 0xfa}
inst, err := x86asm.Decode(bs, 64)
if err != nil {
log.Fatal(err)
}
log.Println(inst)
log.Println("len", inst.Len)
}What did you expect to see?
It should disassemble as endbr64 or repz nop edx. It should have an instruction length of 4.
What did you see instead?
REP Op(0)
len 1