diff options
Diffstat (limited to 'src/cmd/vendor/golang.org/x/arch/arm/armasm/objdumpext_test.go')
| -rw-r--r-- | src/cmd/vendor/golang.org/x/arch/arm/armasm/objdumpext_test.go | 259 |
1 files changed, 0 insertions, 259 deletions
diff --git a/src/cmd/vendor/golang.org/x/arch/arm/armasm/objdumpext_test.go b/src/cmd/vendor/golang.org/x/arch/arm/armasm/objdumpext_test.go deleted file mode 100644 index 033e923d1f..0000000000 --- a/src/cmd/vendor/golang.org/x/arch/arm/armasm/objdumpext_test.go +++ /dev/null @@ -1,259 +0,0 @@ -// Copyright 2014 The Go Authors. All rights reserved. -// Use of this source code is governed by a BSD-style -// license that can be found in the LICENSE file. - -// Copied and simplified from ../../x86/x86asm/objdumpext_test.go. - -package armasm - -import ( - "bytes" - "debug/elf" - "encoding/binary" - "fmt" - "io" - "log" - "os" - "strconv" - "strings" - "testing" -) - -const objdumpPath = "/usr/local/bin/arm-linux-elf-objdump" - -func testObjdumpARM(t *testing.T, generate func(func([]byte))) { - testObjdumpArch(t, generate, ModeARM) -} - -func testObjdumpArch(t *testing.T, generate func(func([]byte)), arch Mode) { - if testing.Short() { - t.Skip("skipping objdump test in short mode") - } - if _, err := os.Stat(objdumpPath); err != nil { - t.Skip(err) - } - - testExtDis(t, "gnu", arch, objdump, generate, allowedMismatchObjdump) -} - -func objdump(ext *ExtDis) error { - // File already written with instructions; add ELF header. - if ext.Arch == ModeARM { - if err := writeELF32(ext.File, ext.Size); err != nil { - return err - } - } else { - panic("unknown arch") - } - - b, err := ext.Run(objdumpPath, "-d", "-z", ext.File.Name()) - if err != nil { - return err - } - - var ( - nmatch int - reading bool - next uint32 = start - addr uint32 - encbuf [4]byte - enc []byte - text string - ) - flush := func() { - if addr == next { - 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)))) - } - if strings.HasPrefix(text, "stmia") { - text = "stm" + text[5:] - } - if strings.HasPrefix(text, "stmfd") { - text = "stmdb" + text[5:] - } - if strings.HasPrefix(text, "ldmfd") { - text = "ldm" + text[5:] - } - text = strings.Replace(text, "#0.0", "#0", -1) - if text == "undefined" && len(enc) == 4 { - text = "error: unknown instruction" - enc = nil - } - if len(enc) == 4 { - // prints as word but we want to record bytes - enc[0], enc[3] = enc[3], enc[0] - enc[1], enc[2] = enc[2], enc[1] - } - ext.Dec <- ExtInst{addr, encbuf, len(enc), text} - encbuf = [4]byte{} - enc = nil - next += 4 - } - } - var textangle = []byte("<.text>:") - for { - line, err := b.ReadSlice('\n') - if err != nil { - if err == io.EOF { - break - } - return fmt.Errorf("reading objdump output: %v", err) - } - if bytes.Contains(line, textangle) { - reading = true - continue - } - if !reading { - continue - } - if debug { - os.Stdout.Write(line) - } - if enc1 := parseContinuation(line, encbuf[:len(enc)]); enc1 != nil { - enc = enc1 - continue - } - flush() - nmatch++ - addr, enc, text = parseLine(line, encbuf[:0]) - if addr > next { - return fmt.Errorf("address out of sync expected <= %#x at %q in:\n%s", next, line, line) - } - } - flush() - 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 ( - undefined = []byte("<UNDEFINED>") - unpredictable = []byte("<UNPREDICTABLE>") - illegalShifter = []byte("<illegal shifter operand>") -) - -func parseLine(line []byte, encstart []byte) (addr uint32, enc []byte, text string) { - oline := line - i := index(line, ":\t") - if i < 0 { - log.Fatalf("cannot parse disassembly: %q", oline) - } - x, err := strconv.ParseUint(string(trimSpace(line[:i])), 16, 32) - if err != nil { - log.Fatalf("cannot parse disassembly: %q", oline) - } - addr = uint32(x) - line = line[i+2:] - i = bytes.IndexByte(line, '\t') - if i < 0 { - log.Fatalf("cannot parse disassembly: %q", oline) - } - enc, ok := parseHex(line[:i], encstart) - if !ok { - log.Fatalf("cannot parse disassembly: %q", oline) - } - line = trimSpace(line[i:]) - if bytes.Contains(line, undefined) { - text = "undefined" - return - } - if bytes.Contains(line, illegalShifter) { - text = "undefined" - return - } - if false && bytes.Contains(line, unpredictable) { - text = "unpredictable" - return - } - if i := bytes.IndexByte(line, ';'); i >= 0 { - line = trimSpace(line[:i]) - } - text = string(fixSpace(line)) - return -} - -func parseContinuation(line []byte, enc []byte) []byte { - i := index(line, ":\t") - if i < 0 { - return nil - } - line = line[i+1:] - enc, _ = parseHex(line, enc) - return enc -} - -// writeELF32 writes an ELF32 header to the file, -// describing a text segment that starts at start -// and extends for size bytes. -func writeELF32(f *os.File, size int) error { - f.Seek(0, io.SeekStart) - var hdr elf.Header32 - var prog elf.Prog32 - var sect elf.Section32 - var buf bytes.Buffer - binary.Write(&buf, binary.LittleEndian, &hdr) - off1 := buf.Len() - binary.Write(&buf, binary.LittleEndian, &prog) - off2 := buf.Len() - binary.Write(&buf, binary.LittleEndian, §) - off3 := buf.Len() - buf.Reset() - data := byte(elf.ELFDATA2LSB) - hdr = elf.Header32{ - Ident: [16]byte{0x7F, 'E', 'L', 'F', 1, data, 1}, - Type: 2, - Machine: uint16(elf.EM_ARM), - Version: 1, - Entry: start, - Phoff: uint32(off1), - Shoff: uint32(off2), - Flags: 0x05000002, - Ehsize: uint16(off1), - Phentsize: uint16(off2 - off1), - Phnum: 1, - Shentsize: uint16(off3 - off2), - Shnum: 3, - Shstrndx: 2, - } - binary.Write(&buf, binary.LittleEndian, &hdr) - prog = elf.Prog32{ - Type: 1, - Off: start, - Vaddr: start, - Paddr: start, - Filesz: uint32(size), - Memsz: uint32(size), - Flags: 5, - Align: start, - } - binary.Write(&buf, binary.LittleEndian, &prog) - binary.Write(&buf, binary.LittleEndian, §) // NULL section - sect = elf.Section32{ - Name: 1, - Type: uint32(elf.SHT_PROGBITS), - Addr: start, - Off: start, - Size: uint32(size), - Flags: uint32(elf.SHF_ALLOC | elf.SHF_EXECINSTR), - Addralign: 4, - } - binary.Write(&buf, binary.LittleEndian, §) // .text - sect = elf.Section32{ - Name: uint32(len("\x00.text\x00")), - Type: uint32(elf.SHT_STRTAB), - Addr: 0, - Off: uint32(off2 + (off3-off2)*3), - Size: uint32(len("\x00.text\x00.shstrtab\x00")), - Addralign: 1, - } - binary.Write(&buf, binary.LittleEndian, §) - buf.WriteString("\x00.text\x00.shstrtab\x00") - f.Write(buf.Bytes()) - return nil -} |