Make a hook demo

hookdemo.mm

#import <UIKit/UIKit.h>
#import "substrate.h"

static IMP original_UIApplication_openURL;

static BOOL replace_UIApplication_openURL(UIApplication *self, SEL cmd, NSURL *url)
{
    UIAlertView *view = [[UIAlertView alloc]
                         initWithTitle:@""
                         message:@"hello"
                         delegate:nil
                         cancelButtonTitle:@"OK"
                         otherButtonTitles:nil];
    
    [view show];
    [view release];
    
    original_UIApplication_openURL(self, cmd, url);
}

__attribute__((constructor))
static void initialize()
{
    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
        
    MSHookMessageEx([UIApplication class],
                       @selector(openURL:),
                        (IMP)replace_UIApplication_openURL,
                        (IMP *)&original_UIApplication_openURL);
        
    [pool release];
}
    

HookDemo.plist

Filter = {
  Bundles = (com.apple.MobileSMS);
};

Makefile

DEVPATH=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer

CC	= $(DEVPATH)/usr/bin/llvm-gcc-4.2
LD	= $(CC)

## SDK版本
SDKVER	= 6.0

MIN_REQUIRED_VERSION=40000

## iPhone SDK路径
IPHONESDK = $(DEVPATH)/SDKs/iPhoneOS$(SDKVER).sdk

## include 路径
INCPATH += -isysroot $(IPHONESDK)

## 编译开关
CFLAGS	+= $(INCPATH) \
		-arch armv7 \
        -pipe \
        -Wno-trigraphs \
        -fpascal-strings \
        -Wreturn-type \
        -Wunused-variable \
        -D__IPHONE_OS_VERSION_MIN_REQUIRED=$(MIN_REQUIRED_VERSION) \
        -O2 \
		-fobjc-abi-version=2 \
		-fobjc-legacy-dispatch
		
CFLAGS += -F"$(IPHONESDK)/System/Library/Frameworks"
CFLAGS += -F"$(IPHONESDK)/System/Library/PrivateFrameworks"		
CFLAGS += -g

## 标准库或者框架的设置
LDFLAGS=	-arch armv7 \
			-liconv \
			-lobjc \
			-lsqlite3 \
			-lz.1 \
			-isysroot $(IPHONESDK) \
				-framework Foundation \
				-framework UIKit \
				-framework CoreFoundation \
				-framework CoreData \
				-framework CoreGraphics\
				-framework AppSupport \
				-framework AudioToolbox \
				-framework CoreAudio \
				-framework WebCore \
				-framework Preferences \
				-framework GraphicsServices \
				-framework IOKit \
				-framework CFNetwork \
				-framework AVFoundation \
				-framework CoreVideo \
				-framework CoreMedia \
				-framework QuartzCore \
				-framework AddressBook \
				-framework iTunesStore \
				-framework AssetsLibrary \
				-multiply_defined suppress \
				-undefined dynamic_lookup \
				-dynamiclib \
				-dead_strip \
			 	-no_dead_strip_inits_and_terms \
				-Wall \
				-Werror \
				-lsubstrate \
				-mthumb \
				-mthumb-interwork \
#				-marm \
#				-mno-thumb \
				-fobjc-exceptions \
				-DUSE_SYSTEM_MALLOC=1 \
				-fno-exceptions \
				-fno-rtti \
				-fno-common -ffast-math -fno-threadsafe-statics \
				-O2 \
				#-s \
				-lstdc++.6 \
				-install_name /Library/MobileSubstrate/DynamicLibraries/HookDemo.dylib 

LDFLAGS+=-L"$(IPHONESDK)/usr/lib"
LDFLAGS+=-F"$(IPHONESDK)/System/Library/Frameworks"
LDFLAGS+=-F"$(IPHONESDK)/System/Library/PrivateFrameworks"
LDFLAGS+=-L.

OBJS      = hookdemo.o

TARGET=HookDemo.dylib


all:	$(TARGET)

$(TARGET):	$(OBJS)
		$(LD) $(LDFLAGS) -o $@ $^
		
%.o:	%.m
		$(CC) -c $(CFLAGS) $< -o $@

%.o:	%.mm
		$(CC) -c $(CFLAGS) $< -o $@
		
%.o:    %.c
		$(CC) -c $(CFLAGS) $< -o $@

clean:
		@rm -f $(OBJS) $(TARGET)

rebuild:
		@make clean
		@make