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      1 /* Copyright 2014, Google Inc.
      2 All rights reserved.
      3 
      4 Redistribution and use in source and binary forms, with or without
      5 modification, are permitted provided that the following conditions are
      6 met:
      7 
      8  * Redistributions of source code must retain the above copyright
      9 notice, this list of conditions and the following disclaimer.
     10  * Redistributions in binary form must reproduce the above
     11 copyright notice, this list of conditions and the following disclaimer
     12 in the documentation and/or other materials provided with the
     13 distribution.
     14  * Neither the name of Google Inc. nor the names of its
     15 contributors may be used to endorse or promote products derived from
     16 this software without specific prior written permission.
     17 
     18 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     19 "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     20 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     21 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     22 OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     23 SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     24 LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     25 DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     26 THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     27 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     28 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     29 */
     30 
     31 package main
     32 
     33 import (
     34 	"debug/macho"
     35 )
     36 
     37 /*
     38 #include "arch_constants.h"
     39 */
     40 import "C"
     41 
     42 // getArchStringFromHeader takes a MachO FileHeader and returns a string that
     43 // represents the CPU type and subtype.
     44 // This function is a Go version of src/common/mac/arch_utilities.cc:BreakpadGetArchInfoFromCpuType().
     45 func getArchStringFromHeader(header macho.FileHeader) string {
     46 	// TODO(rsesek): As of 10.9.4, OS X doesn't list these in /usr/include/mach/machine.h.
     47 	if header.Cpu == C.kCPU_TYPE_ARM64 && header.SubCpu == C.kCPU_SUBTYPE_ARM64_ALL {
     48 		return "arm64"
     49 	}
     50 	if header.Cpu == C.kCPU_TYPE_ARM && header.SubCpu == C.kCPU_SUBTYPE_ARM_V7S {
     51 		return "armv7s"
     52 	}
     53 
     54 	cstr := C.GetNXArchInfoName(C.cpu_type_t(header.Cpu), C.cpu_subtype_t(header.SubCpu))
     55 	if cstr == nil {
     56 		return ""
     57 	}
     58 	return C.GoString(cstr)
     59 }
     60 
     61 const (
     62 	MachODylib  macho.Type = C.kMachHeaderFtypeDylib
     63 	MachOBundle            = C.kMachHeaderFtypeBundle
     64 	MachOExe               = C.kMachHeaderFtypeExe
     65 )
     66