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arm64.go
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arm64.go
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package arm64
import (
"encoding/binary"
"fmt"
"io"
)
// Options Disassemble options
type Options struct {
StartAddress int64
DecimalImm bool
}
// Result Disassemble instruction result
type Result struct {
StrRepr string
Instruction *Instruction
Error error
}
// Disassemble will output the disassembly of the data of a given io.ReadSeeker
func Disassemble(r io.ReadSeeker, options Options) <-chan Result {
out := make(chan Result)
go func() {
var err error
var instrValue uint32
for {
addr, _ := r.Seek(0, io.SeekCurrent)
err = binary.Read(r, binary.LittleEndian, &instrValue)
if err == io.EOF {
close(out)
break
}
if err != nil {
out <- Result{
Error: fmt.Errorf("failed to read instruction: %v", err),
}
close(out)
break
}
if options.StartAddress != 0 {
addr += options.StartAddress
} else {
addr = 0
}
i, err := decompose(instrValue, uint64(addr))
if err != nil {
out <- Result{
Error: fmt.Errorf("failed to decompose instruction: 0x%08x; %v", instrValue, err),
}
continue
}
instruction, err := i.disassemble(options.DecimalImm)
if err != nil {
out <- Result{
StrRepr: fmt.Sprintf("%#08x:\t%08x \t<UNKNOWN>", uint64(addr), instrValue),
Error: fmt.Errorf("failed to disassemble instruction: 0x%08x; %v", instrValue, err),
}
continue
}
out <- Result{
StrRepr: fmt.Sprintf("%#08x:\t%s \t%s", uint64(addr), getOpCodeByteString(instrValue), instruction),
Instruction: i,
Error: nil,
}
}
return
}()
return out
}
// Instructions will output the decoded instructions of the data of a given io.ReadSeeker
func Instructions(r io.ReadSeeker, startAddr int64) (<-chan *Instruction, error) {
out := make(chan *Instruction)
go func() error {
var instrValue uint32
for {
addr, _ := r.Seek(0, io.SeekCurrent)
err := binary.Read(r, binary.LittleEndian, &instrValue)
if err == io.EOF {
break
}
if err != nil {
return fmt.Errorf("failed to read instruction: %v", err)
}
if startAddr > 0 {
addr += startAddr
} else {
addr = 0
}
i, err := decompose(instrValue, 0)
if err != nil {
return fmt.Errorf("failed to decompose instruction: 0x%08x; %v", instrValue, err)
}
out <- i
}
close(out)
return nil
}()
return out, nil
}