#------------------------------------------------------------------------------ # $File: cafebabe,v 1.23 2017/05/25 20:07:23 christos Exp $ # Cafe Babes unite! # # Since Java bytecode and Mach-O universal binaries have the same magic number, # the test must be performed in the same "magic" sequence to get both right. # The long at offset 4 in a Mach-O universal binary tells the number of # architectures; the short at offset 4 in a Java bytecode file is the JVM minor # version and the short at offset 6 is the JVM major version. Since there are only # only 18 labeled Mach-O architectures at current, and the first released # Java class format was version 43.0, we can safely choose any number # between 18 and 39 to test the number of architectures against # (and use as a hack). Let's not use 18, because the Mach-O people # might add another one or two as time goes by... # ### JAVA START ### 0 belong 0xcafebabe >4 belong >30 compiled Java class data, !:mime application/x-java-applet >>6 beshort x version %d. >>4 beshort x \b%d # Which is which? #>>4 belong 0x032d (Java 1.0) #>>4 belong 0x032d (Java 1.1) >>4 belong 0x002e (Java 1.2) >>4 belong 0x002f (Java 1.3) >>4 belong 0x0030 (Java 1.4) >>4 belong 0x0031 (Java 1.5) >>4 belong 0x0032 (Java 1.6) >>4 belong 0x0033 (Java 1.7) >>4 belong 0x0034 (Java 1.8) 0 belong 0xcafed00d JAR compressed with pack200, >5 byte x version %d. >4 byte x \b%d !:mime application/x-java-pack200 0 belong 0xcafed00d JAR compressed with pack200, >5 byte x version %d. >4 byte x \b%d !:mime application/x-java-pack200 ### JAVA END ### ### MACH-O START ### 0 name mach-o \b [ >0 use mach-o-cpu \b >(8.L) indirect x \b: >0 belong x \b] 0 belong 0xcafebabe >4 belong 1 Mach-O universal binary with 1 architecture: !:mime application/x-mach-binary >>8 use mach-o \b >4 belong >1 >>4 belong <20 Mach-O universal binary with %d architectures: !:mime application/x-mach-binary >>>8 use mach-o \b >>4 belong 2 >>>28 use mach-o \b >>4 belong 3 >>>48 use mach-o \b >>4 belong 4 >>>68 use mach-o \b >>4 belong 5 >>>88 use mach-o \b >>4 belong 6 >>>108 use mach-o \b ### MACH-O END ###