leptos-null

//
//  statusbartypes
//
//  Created by Leptos on 3/19/19.
//  Copyright © 2019 Leptos. All rights reserved.
//

#import <UIKit/UIKit.h>

typedef int UIStatusBarItemType;

leptos-null

#import <Foundation/Foundation.h>
#import <mach-o/loader.h>

#if __has_include(<Kernel/kern/cs_blobs.h>)
#   import <Kernel/kern/cs_blobs.h>
#else
    /* some Darwin distributions don't provide the cs_blobs header
     * copy it from the macOS SDK if available, otherwise one of
     * https://opensource.apple.com/source/xnu/xnu-4903.221.2/osfmk/kern/cs_blobs.h.auto.html
     * https://github.com/apple/darwin-xnu/blob/a449c6a3b8014d9406c2ddbdc81795da24aa7443/osfmk/kern/cs_blobs.h

leptos-null

This article aims to describe how to hook Swift functions.

Thanks to help from @NightwindDev for discussion and testing.

Overall, the idea is simple: Write our own Swift code that will have the same calling convention as the target code, then get a pointer to our own code and the target code, and call MSHookFunction with these values.

Code

EthanArbuckle

#import <CoreGraphics/CoreGraphics.h>
#import <Foundation/Foundation.h>
#import <objc/runtime.h>
#import <objc/message.h>
#import <dlfcn.h>

__attribute__((constructor)) static void init(void) {
    
    Method bundleIdentifierMethod = class_getInstanceMethod(objc_getClass("NSBundle"), sel_registerName("bundleIdentifier"));
    IMP newImp = imp_implementationWithBlock(^(id self) {

EthanArbuckle

#include <mach-o/dyld.h>
#include <mach-o/loader.h>
#include <mach-o/nlist.h>
#include <mach-o/dyld_images.h>
#include <dlfcn.h>

static void *dyld_for_each_installed_shared_cache;
static void *dyld_shared_cache_for_each_image;
static void *dyld_image_get_installname;

EthanArbuckle

/*
Found string at address: 0x1048aa84d
Found reference in function: hidden_function
Found function that references string: 0x1048a89ec
*/

#import <Foundation/Foundation.h>
#import <UIKit/UIKit.h>
#import "AppDelegate.h"
#import <mach-o/loader.h>

EthanArbuckle

uint64_t get_image_size(struct mach_header_64 *mh) {
    struct load_command *cmd = (struct load_command *)((uint8_t *)mh + sizeof(struct mach_header_64));
    uint64_t max_addr = 0;
    for (uint32_t i = 0; i < mh->ncmds; i++) {
        if (cmd->cmd == LC_SEGMENT_64) {
            struct segment_command_64 *seg = (struct segment_command_64 *)cmd;
            uint64_t seg_end = seg->vmaddr + seg->vmsize;
            if (seg_end > max_addr) {
                max_addr = seg_end;
            }

donato-fiore

#import <Foundation/Foundation.h>

@interface NSObject (Private)
- (id)safeValueForKey:(NSString *)key;
@end

@interface NSArray (BaseBoard)
- (id)bs_mapNoNulls:(id (^)(id))arg1;
- (id)bs_flatten;
- (id)bs_filter:(BOOL (^)(id))arg1;