57 lines
1.2 KiB
C++
57 lines
1.2 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <AK/Types.h>
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#include <assert.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/internals.h>
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#include <unistd.h>
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#ifndef _DYNAMIC_LOADER
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extern "C" {
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extern u32 __stack_chk_guard;
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int main(int, char**, char**);
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// Tell the compiler that this may be called from somewhere else.
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int _entry(int argc, char** argv, char** env);
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void _start(int, char**, char**);
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NAKED void _start(int, char**, char**)
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{
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asm(
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"push $0\n"
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"jmp _entry@plt\n");
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}
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int _entry(int argc, char** argv, char** env)
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{
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u32 original_stack_chk = __stack_chk_guard;
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arc4random_buf(&__stack_chk_guard, sizeof(__stack_chk_guard));
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if (__stack_chk_guard == 0)
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__stack_chk_guard = original_stack_chk;
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environ = env;
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__environ_is_malloced = false;
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_init();
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int status = main(argc, argv, environ);
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exit(status);
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// We should never get here, but if we ever do, make sure to
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// restore the stack guard to the value we entered _start with.
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// Then we won't trigger the stack canary check on the way out.
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__stack_chk_guard = original_stack_chk;
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return 20150614;
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}
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}
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#endif
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