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#include <AK/Types.h>
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
extern "C" {
int main(int, char**, char**);
__thread int errno;
char** environ;
bool __environ_is_malloced;
void __libc_init()
{
void __malloc_init();
__malloc_init();
void __stdio_init();
__stdio_init();
}
int _start(int argc, char** argv, char** env)
{
environ = env;
__environ_is_malloced = false;
__libc_init();
extern void _init();
_init();
extern void (*__init_array_start[])(int, char**, char**) __attribute__((visibility("hidden")));
extern void (*__init_array_end[])(int, char**, char**) __attribute__((visibility("hidden")));
const size_t size = __init_array_end - __init_array_start;
for (size_t i = 0; i < size; i++)
(*__init_array_start[i])(argc, argv, env);
int status = main(argc, argv, environ);
exit(status);
return 20150614;
}
[[noreturn]] void __cxa_pure_virtual()
{
ASSERT_NOT_REACHED();
}
typedef void (*AtExitFunction)(void *);
struct __exit_entry
{
AtExitFunction method;
void* parameter;
void* dso_handle;
bool has_been_called;
};
static __exit_entry __exit_entries[1024]{};
static int __exit_entry_count = 0;
int __cxa_atexit(AtExitFunction exit_function, void *parameter, void *dso_handle)
{
if (__exit_entry_count >= 1024)
return -1;
__exit_entries[__exit_entry_count++] = { exit_function, parameter, dso_handle, false};
return 0;
}
void __cxa_finalize(void* dso_handle)
{
// From the itanium abi, https://itanium-cxx-abi.github.io/cxx-abi/abi.html#dso-dtor-runtime-api
//
// When __cxa_finalize(d) is called, it should walk the termination function list, calling each in turn
// if d matches __dso_handle for the termination function entry. If d == NULL, it should call all of them.
// Multiple calls to __cxa_finalize shall not result in calling termination function entries multiple times;
// the implementation may either remove entries or mark them finished.
int entry_index = __exit_entry_count;
while (--entry_index >= 0)
{
auto& exit_entry = __exit_entries[entry_index];
bool needs_calling = !exit_entry.has_been_called && (!dso_handle || dso_handle == exit_entry.dso_handle);
if (needs_calling) {
exit_entry.method(exit_entry.parameter);
exit_entry.has_been_called = true;
}
}
}
extern u32 __stack_chk_guard;
u32 __stack_chk_guard = (u32)0xc0000c13;
[[noreturn]] void __stack_chk_fail()
{
ASSERT_NOT_REACHED();
}
}
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