diff options
Diffstat (limited to 'magic/Magdir/cafebabe')
| -rw-r--r-- | magic/Magdir/cafebabe | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/magic/Magdir/cafebabe b/magic/Magdir/cafebabe new file mode 100644 index 0000000..4f97cc0 --- /dev/null +++ b/magic/Magdir/cafebabe @@ -0,0 +1,107 @@ + +#------------------------------------------------------------------------------ +# $File: cafebabe,v 1.28 2022/07/01 23:24:47 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 ### +# Reference: http://en.wikipedia.org/wiki/Java_class_file +# Update: Joerg Jenderek +0 belong 0xcafebabe +>4 ubelong >30 compiled Java class data, +!:mime application/x-java-applet +#!:mime application/java-byte-code +!:ext class +>>6 ubeshort x version %d. +>>4 ubeshort x \b%d +# for debugging purpose version as hexadecimal to compare with Mach-O universal binary +#>>4 ubelong x (%#8.8x) +# Which is which? +# https://docs.oracle.com/javase/specs/jvms/se6/html/ClassFile.doc.html +#>>4 belong 0x002b (Java 0.?) +#>>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) +>>4 belong 0x0035 (Java SE 9) +>>4 belong 0x0036 (Java SE 10) +>>4 belong 0x0037 (Java SE 11) +>>4 belong 0x0038 (Java SE 12) +>>4 belong 0x0039 (Java SE 13) +>>4 belong 0x003A (Java SE 14) +>>4 belong 0x003B (Java SE 15) +>>4 belong 0x003C (Java SE 16) +>>4 belong 0x003D (Java SE 17) +>>4 belong 0x003E (Java SE 18) +>>4 belong 0x003F (Java SE 19) +>>4 belong 0x0040 (Java SE 20) +# pool count unequal zero +#>>8 beshort x \b, pool count %#x +# pool table +#>>10 ubequad x \b, pool %#16.16llx... + +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 ### +# URL: https://en.wikipedia.org/wiki/Mach-O + +0 name mach-o \b [ +# for debugging purpose CPU type as hexadecimal +#>0 ubequad x CPU=%16.16llx +# display CPU type as string like: i386 x86_64 ... armv7 armv7k ... +>0 use mach-o-cpu \b +# for debugging purpose print offset to 1st mach_header like: +# 1000h 4000h seldom 2d000h 88000h 5b000h 10e000 h +#>8 ubelong x at %#x offset +>(8.L) indirect x \b: +>0 belong x \b] + +# Reference: https://opensource.apple.com/source/cctools/cctools-949.0.1/ +# include/mach-o/fat.h +# include/mach/machine.h +0 belong 0xcafebabe +>4 belong 1 Mach-O universal binary with 1 architecture: +!:mime application/x-mach-binary +>>8 use mach-o \b +# nfat_arch; number of CPU architectures; highest is 18 for CPU_TYPE_POWERPC in 2020 +>4 ubelong >1 +>>4 ubelong <20 Mach-O universal binary with %d architectures: +!:mime application/x-mach-binary +>>>8 use mach-o \b +>>>4 ubelong >1 +>>>>28 use mach-o \b +>>>4 ubelong >2 +>>>>48 use mach-o \b +>>>4 ubelong >3 +>>>>68 use mach-o \b +>>>4 ubelong >4 +>>>>88 use mach-o \b +>>>4 ubelong >5 +>>>>108 use mach-o \b + +### MACH-O END ### |