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path: root/src/tools/mac/upload_system_symbols/arch_reader.go
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Diffstat (limited to 'src/tools/mac/upload_system_symbols/arch_reader.go')
-rw-r--r--src/tools/mac/upload_system_symbols/arch_reader.go239
1 files changed, 18 insertions, 221 deletions
diff --git a/src/tools/mac/upload_system_symbols/arch_reader.go b/src/tools/mac/upload_system_symbols/arch_reader.go
index 0468836e..f6064823 100644
--- a/src/tools/mac/upload_system_symbols/arch_reader.go
+++ b/src/tools/mac/upload_system_symbols/arch_reader.go
@@ -31,238 +31,35 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
package main
import (
- "encoding/binary"
- "errors"
- "fmt"
- "os"
- "reflect"
- "unsafe"
+ "debug/macho"
)
/*
-#include <mach-o/fat.h>
-#include <mach-o/loader.h>
-#include <string.h>
-
#include "arch_constants.h"
*/
import "C"
-var (
- ErrNotMachO = errors.New("GetMachOImageInfo: file is not a supported Mach-O image")
- ErrUnsupportedArch = errors.New("GetMachOImageInfo: unknown architecture detected")
-)
-
-const (
- ArchI386 = "i386"
- ArchX86_64 = "x86_64"
-)
-
-type MachOType int
-
-const (
- MachODylib MachOType = C.kMachHeaderFtypeDylib
- MachOBundle = C.kMachHeaderFtypeBundle
- MachOExe = C.kMachHeaderFtypeExe
-)
-
-type ImageInfo struct {
- Type MachOType
- Arch string
-}
-
-// GetMachOImageInfo will read the file at filepath and determine if it is
-// Mach-O. If it is, it will return a slice of ImageInfo that describe the
-// images in the file (may be more than one if it is a fat image).
-func GetMachOImageInfo(filepath string) ([]ImageInfo, error) {
- f, err := os.Open(filepath)
- if err != nil {
- return nil, err
- }
- defer f.Close()
-
- // Read the magic number to determine the type of file this is.
- var magic uint32
- err = binary.Read(f, binary.LittleEndian, &magic)
- if err != nil {
- return nil, err
- }
-
- // Rewind the file since the magic number is a field in the header
- // structs.
- f.Seek(0, os.SEEK_SET)
-
- switch magic {
- case C.kMachHeaderMagic32:
- return readThinHeader(f, C.kMachHeaderMagic32)
- case C.kMachHeaderMagic64:
- return readThinHeader(f, C.kMachHeaderMagic64)
- case C.kMachHeaderCigamFat: // Fat header is big-endian but was read in little.
- return readFatHeader(f)
- }
-
- return nil, ErrNotMachO
-}
-
-func readThinHeader(f *os.File, expectedMagic uint32) ([]ImageInfo, error) {
- var (
- magic, filetype uint32
- cpu C.cpu_type_t
- err error
- )
-
- if expectedMagic == C.kMachHeaderMagic32 {
- magic, cpu, filetype, err = readThin32Header(f)
- } else if expectedMagic == C.kMachHeaderMagic64 {
- magic, cpu, filetype, err = readThin64Header(f)
- } else {
- panic(fmt.Sprintf("Unexpected magic %#x", magic))
- }
- if err != nil {
- return nil, err
- }
-
- if magic != expectedMagic {
- return nil, fmt.Errorf("readThinHeader: unexpected magic number %#x", magic)
- }
-
- arch := cpuTypeToArch(cpu)
- if arch == "" {
- return nil, ErrUnsupportedArch
- }
- return []ImageInfo{{MachOType(filetype), arch}}, nil
-}
-
-func readThin32Header(f *os.File) (uint32, C.cpu_type_t, uint32, error) {
- var machHeader C.struct_mach_header
- err := readStruct(f, binary.LittleEndian, unsafe.Pointer(&machHeader), C.struct_mach_header{})
- if err != nil {
- return 0, 0, 0, err
+// getArchStringFromHeader takes a MachO FileHeader and returns a string that
+// represents the CPU type and subtype.
+// This function is a Go version of src/common/mac/arch_utilities.cc:BreakpadGetArchInfoFromCpuType().
+func getArchStringFromHeader(header macho.FileHeader) string {
+ // TODO(rsesek): As of 10.9.4, OS X doesn't list these in /usr/include/mach/machine.h.
+ if header.Cpu == C.kCPU_TYPE_ARM64 && header.SubCpu == C.kCPU_SUBTYPE_ARM64_ALL {
+ return "arm64"
}
- return uint32(machHeader.magic), machHeader.cputype, uint32(machHeader.filetype), nil
-}
-
-func readThin64Header(f *os.File) (uint32, C.cpu_type_t, uint32, error) {
- var machHeader C.struct_mach_header_64
- err := readStruct(f, binary.LittleEndian, unsafe.Pointer(&machHeader), C.struct_mach_header_64{})
- if err != nil {
- return 0, 0, 0, err
- }
- return uint32(machHeader.magic), machHeader.cputype, uint32(machHeader.filetype), nil
-}
-
-func readFatHeader(f *os.File) ([]ImageInfo, error) {
- var fatHeader C.struct_fat_header
- err := readStruct(f, binary.BigEndian, unsafe.Pointer(&fatHeader), C.struct_fat_header{})
- if err != nil {
- return nil, err
- }
-
- if fatHeader.magic != C.kMachHeaderMagicFat {
- return nil, fmt.Errorf("readFatHeader: unexpected magic number %#x", fatHeader.magic)
- }
-
- // Read the fat_arch headers.
- headers := make([]C.struct_fat_arch, fatHeader.nfat_arch)
- for i := 0; i < int(fatHeader.nfat_arch); i++ {
- var fatArch C.struct_fat_arch
- err = readStruct(f, binary.BigEndian, unsafe.Pointer(&fatArch), C.struct_fat_arch{})
- if err != nil {
- return nil, fmt.Errorf("readFatHeader: %v", err)
- }
- headers[i] = fatArch
- }
-
- seenArches := make(map[string]int)
-
- // Now go to each arch in the fat image and read its mach header.
- infos := make([]ImageInfo, 0, len(headers))
- for _, header := range headers {
- f.Seek(int64(header.offset), os.SEEK_SET)
-
- var thinarch []ImageInfo
- var expectedArch string
- switch header.cputype {
- case C.kCPUType_i386:
- thinarch, err = readThinHeader(f, C.kMachHeaderMagic32)
- expectedArch = ArchI386
- case C.kCPUType_x86_64:
- thinarch, err = readThinHeader(f, C.kMachHeaderMagic64)
- expectedArch = ArchX86_64
- default:
- err = ErrUnsupportedArch
- }
-
- if err != nil {
- return nil, err
- }
- if thinarch[0].Arch != expectedArch {
- return nil, fmt.Errorf("readFatHeader: expected arch %d, got %d", thinarch[0].Arch, expectedArch)
- }
-
- infos = append(infos, thinarch[0])
- seenArches[thinarch[0].Arch]++
+ if header.Cpu == C.kCPU_TYPE_ARM && header.SubCpu == C.kCPU_SUBTYPE_ARM_V7S {
+ return "armv7s"
}
- for arch, count := range seenArches {
- if count != 1 {
- return nil, fmt.Errorf("readFatHeader: duplicate arch %s detected", arch)
- }
- }
-
- return infos, nil
-}
-
-// TODO(rsesek): Support more arches.
-func cpuTypeToArch(cpu C.cpu_type_t) string {
- switch cpu {
- case C.kCPUType_i386:
- return ArchI386
- case C.kCPUType_x86_64:
- return ArchX86_64
- default:
+ cstr := C.GetNXArchInfoName(C.cpu_type_t(header.Cpu), C.cpu_subtype_t(header.SubCpu))
+ if cstr == nil {
return ""
}
+ return C.GoString(cstr)
}
-// readStruct is a incomplete version of binary.Read that uses unsafe pointers
-// to set values in unexported fields. From |f|, this will read the fields of
-// the |destType| template instance, in the specified byte |order|, and place
-// the resulting memory into |dest|.
-func readStruct(f *os.File, order binary.ByteOrder, dest unsafe.Pointer, destType interface{}) error {
- rv := reflect.ValueOf(destType)
- rt := rv.Type()
- destPtr := uintptr(dest)
-
- for i := 0; i < rv.NumField(); i++ {
- field := rv.Field(i)
- fieldType := rt.Field(i)
-
- var vp unsafe.Pointer
- var err error
-
- switch field.Kind() {
- case reflect.Int32:
- var v int32
- vp = unsafe.Pointer(&v)
- err = binary.Read(f, order, &v)
- case reflect.Uint32:
- var v uint32
- vp = unsafe.Pointer(&v)
- err = binary.Read(f, order, &v)
- default:
- err = fmt.Errorf("readStruct: unsupported type %v", fieldType)
- }
-
- if err != nil {
- return err
- }
-
- memcpy(destPtr+fieldType.Offset, vp, fieldType.Type.Size())
- }
- return nil
-}
-
-func memcpy(dest uintptr, value unsafe.Pointer, size uintptr) {
- C.memcpy(unsafe.Pointer(dest), value, C.size_t(size))
-}
+const (
+ MachODylib macho.Type = C.kMachHeaderFtypeDylib
+ MachOBundle = C.kMachHeaderFtypeBundle
+ MachOExe = C.kMachHeaderFtypeExe
+)
generated by cgit v1.2.1 (git 2.18.0) at 2024-06-26 04:25:38 +0000