mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2025-05-02 17:28:48 +00:00
a5a62f99c5
Otherwise it'll use the first 32 bits that happen to come after, leading to very weird bugs. Fixes #8601
57 lines
1.2 KiB
C++
57 lines
1.2 KiB
C++
/*
|
|
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#include <AK/Types.h>
|
|
#include <assert.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <sys/internals.h>
|
|
#include <unistd.h>
|
|
|
|
#ifndef _DYNAMIC_LOADER
|
|
extern "C" {
|
|
|
|
extern size_t __stack_chk_guard;
|
|
|
|
int main(int, char**, char**);
|
|
|
|
// Tell the compiler that this may be called from somewhere else.
|
|
int _entry(int argc, char** argv, char** env);
|
|
void _start(int, char**, char**);
|
|
|
|
NAKED void _start(int, char**, char**)
|
|
{
|
|
asm(
|
|
"push $0\n"
|
|
"jmp _entry@plt\n");
|
|
}
|
|
|
|
int _entry(int argc, char** argv, char** env)
|
|
{
|
|
size_t original_stack_chk = __stack_chk_guard;
|
|
arc4random_buf(&__stack_chk_guard, sizeof(__stack_chk_guard));
|
|
|
|
if (__stack_chk_guard == 0)
|
|
__stack_chk_guard = original_stack_chk;
|
|
|
|
environ = env;
|
|
__environ_is_malloced = false;
|
|
|
|
_init();
|
|
|
|
int status = main(argc, argv, environ);
|
|
|
|
exit(status);
|
|
|
|
// We should never get here, but if we ever do, make sure to
|
|
// restore the stack guard to the value we entered _start with.
|
|
// Then we won't trigger the stack canary check on the way out.
|
|
__stack_chk_guard = original_stack_chk;
|
|
|
|
return 20150614;
|
|
}
|
|
}
|
|
#endif
|