knightsc

//
//  main.m
//  TeslaClient
//
//  Created by Scott Knight on 6/11/19.
//  Copyright © 2019 Scott Knight. All rights reserved.
//

#import <Foundation/Foundation.h>

tom-seddon

Random Mach notes

mach_thread_self increments ref count

Each call to mach_thread_self adds another MACH_PORT_RIGHT_SEND refcount. For each call to mach_thread_self, you need to call mach_port_deallocate on the result.

(This does not apply to mach_task_self.)

zntfdr

# Call this inside the bin directory of a build of the Swift compiler,
# e.g. build/Xcode-ReleaseAssert/swift-macosx-x86_64/Release/bin.
#
# Adjust the path to match your Xode installation or pick a different binary to dump.
#
# Tested with Xcode 12.0 beta 2.
#
# Note: I used a Swift 5.3 compiler build from a few weeks ago that I had laying around.
# Because of ABI stability, I don't think the swift-reflection-dump version has to match
# the compiler version that was used to build the binary, but I'm not 100% sure.

dougallj

# IDA (disassembler) and Hex-Rays (decompiler) plugin for Apple AMX
#
# WIP research. (This was edited to add more info after someone posted it to
# Hacker News. Click "Revisions" to see full changes.)
#
# Copyright (c) 2020 dougallj


# Based on Python port of VMX intrinsics plugin:
# Copyright (c) 2019 w4kfu - Synacktiv

jakeajames

#include <stdlib.h>
#include <stdio.h>
#include <pthread/pthread.h>
#include <mach/mach.h>

struct ool_msg  {
    mach_msg_header_t hdr;
    mach_msg_body_t body;
    mach_msg_ool_ports_descriptor_t ool_ports[];
};

saagarjha

To build this:

$ swiftc -emit-object XCBBuildServiceFix.swift -O
$ clang XCBBuildServiceFix.o XCBBuildServiceFix.s -shared -o libXCBBuildServiceFix.dylib -O -L /usr/lib/swift/ -lswiftCore -F /Applications/Xcode.app/Contents/SharedFrameworks/XCBuild.framework/Versions/Current/PlugIns/XCBBuildService.bundle/Contents/Frameworks/ -framework XCBUtil -framework XCBProtocol

Then inject the result into XCBBuildService, which launches from /Applications/Xcode.app/Contents/SharedFrameworks/XCBuild.framework/Versions/Current/PlugIns/XCBBuildService.bundle/Contents/MacOS/XCBBuildService, using your injection tool of choice.