zacho

...or Zig's Mach-O parser. This project started off as a dummy scratchpad for reinforcing my understanding of the Mach-O file format while I was working on the Zig's stage2 Mach-O linker (I still am working on it, in case anyone was asking).

My current vision for zacho is for it to be a cross-platform version of otool and pagestuff macOS utilities. These seem to be very useful when battling the Darwin kernel and dyld when those refuse to load your hand-crafter binary, or you just like looking at Mach-O dissected output.

Usage

Usage: zacho [options] file

General options:
-c, --code-signature        Print the contents of code signature (if any)
-d, --dyld-info             Print the contents of dyld rebase and bind opcodes
-e, --exports-trie          Print export trie (if any)
-h, --header                Print the Mach-O header
-i, --indirect-symbol-table Print the indirect symbol table
-l, --load-commands         Print load commands
-r, --relocations           Print relocation entries (if any)
-s, --symbol-table          Print the symbol table
-u, --unwind-info           Print the contents of (compact) unwind info section (if any)
-v, --verbose               Print more detailed info for each flag
--verify-memory-layout      Print virtual memory layout and verify there is no overlap
--help                      Display this help and exit

Currently, zacho will let you print parsed Mach-O header, and print formatted load commands. I should point here out that I'm basing the flags on otool so if you're familiar with those, zacho should feel like second home to you.

Building from source

Building from source requires Zig nightly.

$ git clone https://github.com/kubkon/zacho.git
$ zig build