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|
package x86asm
import (
"bytes"
"fmt"
"io"
"log"
"os"
"strconv"
"strings"
"testing"
)
// xed binary from Intel sde-external-6.22.0-2014-03-06.
const xedPath = "/Users/rsc/bin/xed"
func testXedArch(t *testing.T, arch int, generate func(func([]byte))) {
if testing.Short() {
t.Skip("skipping xed test in short mode")
}
if _, err := os.Stat(xedPath); err != nil {
t.Skip(err)
}
testExtDis(t, "intel", arch, xed, generate, allowedMismatchXed)
}
func testXed32(t *testing.T, generate func(func([]byte))) {
testXedArch(t, 32, generate)
}
func testXed64(t *testing.T, generate func(func([]byte))) {
testXedArch(t, 64, generate)
}
func xed(ext *ExtDis) error {
b, err := ext.Run(xedPath, fmt.Sprintf("-%d", ext.Arch), "-n", "1G", "-ir", ext.File.Name())
if err != nil {
return err
}
nmatch := 0
next := uint32(start)
var (
addr uint32
encbuf [32]byte
enc []byte
text string
)
var xedEnd = []byte("# end of text section")
var xedEnd1 = []byte("# Errors")
eof := false
for {
line, err := b.ReadSlice('\n')
if err != nil {
if err == io.EOF {
break
}
return fmt.Errorf("reading objdump output: %v", err)
}
if debug {
os.Stdout.Write(line)
}
if bytes.HasPrefix(line, xedEnd) || bytes.HasPrefix(line, xedEnd1) {
eof = true
}
if eof {
continue
}
nmatch++
addr, enc, text = parseLineXed(line, encbuf[:0])
if addr > next {
return fmt.Errorf("address out of sync expected <= %#x at %q in:\n%s", next, line, line)
}
if addr < next {
continue
}
switch text {
case "repz":
text = "rep"
case "repnz":
text = "repn"
default:
text = strings.Replace(text, "repz ", "rep ", -1)
text = strings.Replace(text, "repnz ", "repn ", -1)
}
if m := pcrelw.FindStringSubmatch(text); m != nil {
targ, _ := strconv.ParseUint(m[2], 16, 64)
text = fmt.Sprintf("%s .%+#x", m[1], int16(uint32(targ)-uint32(uint16(addr))-uint32(len(enc))))
}
if m := pcrel.FindStringSubmatch(text); m != nil {
targ, _ := strconv.ParseUint(m[2], 16, 64)
text = fmt.Sprintf("%s .%+#x", m[1], int32(uint32(targ)-addr-uint32(len(enc))))
}
ext.Dec <- ExtInst{addr, encbuf, len(enc), text}
encbuf = [32]byte{}
enc = nil
next += 32
}
if next != start+uint32(ext.Size) {
return fmt.Errorf("not enough results found [%d %d]", next, start+ext.Size)
}
if err := ext.Wait(); err != nil {
return fmt.Errorf("exec: %v", err)
}
return nil
}
var (
xedInRaw = []byte("In raw...")
xedDots = []byte("...")
xdis = []byte("XDIS ")
xedError = []byte("ERROR: ")
xedNoDecode = []byte("Could not decode at offset: 0x")
)
func parseLineXed(line []byte, encstart []byte) (addr uint32, enc []byte, text string) {
oline := line
if bytes.HasPrefix(line, xedInRaw) || bytes.HasPrefix(line, xedDots) {
return 0, nil, ""
}
if bytes.HasPrefix(line, xedError) {
i := bytes.IndexByte(line[len(xedError):], ' ')
if i < 0 {
log.Fatalf("cannot parse error: %q", oline)
}
errstr := string(line[len(xedError):])
i = bytes.Index(line, xedNoDecode)
if i < 0 {
log.Fatalf("cannot parse error: %q", oline)
}
i += len(xedNoDecode)
j := bytes.IndexByte(line[i:], ' ')
if j < 0 {
log.Fatalf("cannot parse error: %q", oline)
}
x, err := strconv.ParseUint(string(trimSpace(line[i:i+j])), 16, 32)
if err != nil {
log.Fatalf("cannot parse disassembly: %q", oline)
}
addr = uint32(x)
return addr, nil, errstr
}
if !bytes.HasPrefix(line, xdis) {
log.Fatalf("cannot parse disassembly: %q", oline)
}
i := bytes.IndexByte(line, ':')
if i < 0 {
log.Fatalf("cannot parse disassembly: %q", oline)
}
x, err := strconv.ParseUint(string(trimSpace(line[len(xdis):i])), 16, 32)
if err != nil {
log.Fatalf("cannot parse disassembly: %q", oline)
}
addr = uint32(x)
// spaces
i++
for i < len(line) && line[i] == ' ' {
i++
}
// instruction class, spaces
for i < len(line) && line[i] != ' ' {
i++
}
for i < len(line) && line[i] == ' ' {
i++
}
// instruction set, spaces
for i < len(line) && line[i] != ' ' {
i++
}
for i < len(line) && line[i] == ' ' {
i++
}
// hex
hexStart := i
for i < len(line) && line[i] != ' ' {
i++
}
hexEnd := i
for i < len(line) && line[i] == ' ' {
i++
}
// text
textStart := i
for i < len(line) && line[i] != '\n' {
i++
}
textEnd := i
enc, ok := parseHex(line[hexStart:hexEnd], encstart)
if !ok {
log.Fatalf("cannot parse disassembly: %q", oline)
}
return addr, enc, string(fixSpace(line[textStart:textEnd]))
}
|
