Android openGL hook

Android openGL hook

hook头文件

#ifndef _GL_INTERFACETEST_H_
#define _GL_INTERFACETEST_H_
namespace android {
	void hook_eglSwapBuffers();
}
#endif

hook实现

#include 
#include "egl_hook.h"

namespace android {
	void hook_eglSwapBuffers() {
		ALOGD("hook successfully! eglSwapBuffer...");
		return;
	}
}

hook调用点

在eglApi.cpp内增加hook点

EGLBoolean eglSwapBuffers(EGLDisplay dpy, EGLSurface surface)
{
	hook_eglSwapBuffers();
    return eglSwapBuffersWithDamageKHR(dpy, surface, NULL, 0);
}

makefile

Android.bp

cc_library_shared {
    name: "libEGL",
    defaults: ["egl_libs_defaults"],
    srcs: [
		"EGL/egl_hook.cpp",
        "EGL/egl_tls.cpp",
        "EGL/egl_cache.cpp",
        "EGL/egl_display.cpp",
        "EGL/egl_object.cpp",
        "EGL/egl.cpp",
        "EGL/eglApi.cpp",
        "EGL/Loader.cpp",
    ],
    shared_libs: [
        "libvndksupport",
        "[email protected]",
        "android.hardware.configstore-utils",
        "libhidlbase",
        "libhidltransport",
        "libutils",
    ],
    static_libs: [
        "libEGL_getProcAddress",
        "libEGL_blobCache",
    ],
    ldflags: ["-Wl,--exclude-libs=ALL"],
    export_include_dirs: ["EGL/include"],
}

其他

可以将hook封装成库调用
可以在hook库中新建线程实现某些吓死人的技术