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/*
main.cpp
This file is part of GammaRay, the Qt application inspection and manipulation tool.
SPDX-FileCopyrightText: 2010 Klarälvdalens Datakonsult AB, a KDAB Group company <info@kdab.com>
Author: Andreas Holzammer <andreas.holzammer@kdab.com>
SPDX-License-Identifier: GPL-2.0-or-later
Contact KDAB at <info@kdab.com> for commercial licensing options.
*/
#include <QApplication>
#include <QDebug>
#include "mainwindow.h"
#include <dlfcn.h>
#include <inttypes.h>
#include <cassert>
#include <sys/mman.h>
#include <sys/types.h>
#include <sys/errno.h>
static inline void *
page_align(void *addr)
{
assert(addr != 0);
return ( void * )(( size_t )addr & ~(0xFFFF));
}
void writeJmp(void *func, void *replacement)
{
quint8 *cur = ( quint8 * )func;
quint8 *aligned = ( quint8 * )page_align(cur);
assert(mprotect(aligned, 0xFFFF, PROT_READ | PROT_WRITE | PROT_EXEC) == 0);
*cur = 0xff;
*(++cur) = 0x25;
*(( quint32 * )++cur) = 0;
cur += sizeof(quint32);
*(( quint64 * )cur) = ( quint64 )replacement;
assert(mprotect(aligned, 0xFFFF, PROT_READ | PROT_EXEC) == 0);
}
void test()
{
qWarning() << "hook test!";
}
int main(int argc, char *argv[])
{
void *qt_startup_hook_addr = dlsym(RTLD_NEXT, "qt_startup_hook");
writeJmp(qt_startup_hook_addr, ( void * )test);
QApplication a(argc, argv);
MainWindow w;
w.show();
return a.exec();
}
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