### Emulate iOS Executables with Chomper

Source: https://github.com/sledgeh4w/chomper/blob/main/README.md

Demonstrates how to initialize Chomper for iOS emulation, load an executable module, prepare arguments like strings and buffers, and call a specific function address within the emulated environment. It shows how to read string results from memory.

```Python
import uuid

from chomper import Chomper
from chomper.const import ARCH_ARM64, OS_IOS

# For iOS, system libraries will be automatically loaded from `rootfs_path`
emu = Chomper(
    arch=ARCH_ARM64,
    os_type=OS_IOS,
    rootfs_path="rootfs/ios",
)

# Load main program
duapp = emu.load_module("examples/binaries/ios/com.siwuai.duapp/DUApp")

s = "chomper"

# Construct arguments
a1 = emu.create_string("objc")
a2 = emu.create_string(s)
a3 = len(s)
a4 = emu.create_string(str(uuid.uuid4()))
a5 = emu.create_buffer(8)
a6 = emu.create_buffer(8)
a7 = emu.create_string("com.siwuai.duapp")

# Call function
emu.call_address(duapp.base + 0x9322118, a1, a2, a3, a4, a5, a6, a7)
result = emu.read_string(emu.read_pointer(a5))
```

--------------------------------

### Emulate Android Native Libraries with Chomper

Source: https://github.com/sledgeh4w/chomper/blob/main/README.md

Shows how to configure Chomper for Android emulation, load essential system libraries like libc.so and libz.so, and load a custom Android native library (SO file). It demonstrates calling a function within the loaded library, passing arguments such as strings and buffers, and reading byte results.

```Python
from chomper import Chomper
from chomper.const import ARCH_ARM64, OS_ANDROID

emu = Chomper(arch=ARCH_ARM64, os_type=OS_ANDROID)

# Load C standard and other libraries
emu.load_module("rootfs/android/system/lib64/libc.so")
emu.load_module("rootfs/android/system/lib64/libz.so")

libszstone = emu.load_module(
    "examples/binaries/android/com.shizhuang.duapp/libszstone.so",
    exec_init_array=True,
)

s = "chomper"

a1 = emu.create_string(s)
a2 = len(s)
a3 = emu.create_buffer(1024)

result_size = emu.call_address(libszstone.base + 0x2F1C8, a1, a2, a3)
result = emu.read_bytes(a3, result_size)
```

--------------------------------

### Work with Objective-C Objects in Chomper

Source: https://github.com/sledgeh4w/chomper/blob/main/README.md

Illustrates interacting with Objective-C runtime features using Chomper. This includes setting up an Objective-C runtime, finding classes, creating Objective-C string objects, calling methods on these objects, and managing memory with an autorelease pool context manager. It also shows converting Objective-C strings back to C strings.

```Python
from chomper import Chomper
from chomper.const import ARCH_ARM64, OS_IOS
from chomper.objc import ObjcRuntime

emu = Chomper(
    arch=ARCH_ARM64,
    os_type=OS_IOS,
    rootfs_path="rootfs/ios",
)

objc = ObjcRuntime(emu)

emu.load_module("examples/binaries/ios/cn.com.scal.sichuanair/zsch")

# Use this context manager to ensure that Objective-C objects can be automatically released
with objc.autorelease_pool():
    # Find class
    zsch_rsa_class = objc.find_class("ZSCHRSA")

    # Construct NSString object
    a1 = objc.create_ns_string("test")

    # Call Objective-C method
    req_sign = zsch_rsa_class.call_method("getReqSign:", a1)

    # Convert NSString object to C string
    result_ptr = req_sign.call_method("UTF8String")
    result = emu.read_string(result_ptr)
```

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