77 lines
1.7 KiB
C++
77 lines
1.7 KiB
C++
#include <kernel/Panic.h>
|
|
|
|
#define ATEXIT_MAX_FUNCS 128
|
|
|
|
struct atexit_func_entry_t
|
|
{
|
|
void(*func)(void*);
|
|
void* arg;
|
|
void* dso_handle;
|
|
};
|
|
|
|
static atexit_func_entry_t __atexit_funcs[ATEXIT_MAX_FUNCS];
|
|
static size_t __atexit_func_count = 0;
|
|
|
|
extern "C" int __cxa_atexit(void(*func)(void*), void* arg, void* dso_handle)
|
|
{
|
|
if (__atexit_func_count >= ATEXIT_MAX_FUNCS)
|
|
return -1;
|
|
auto& atexit_func = __atexit_funcs[__atexit_func_count++];
|
|
atexit_func.func = func;
|
|
atexit_func.arg = arg;
|
|
atexit_func.dso_handle = dso_handle;
|
|
return 0;
|
|
};
|
|
|
|
extern "C" void __cxa_finalize(void* f)
|
|
{
|
|
for (size_t i = __atexit_func_count; i > 0; i--)
|
|
{
|
|
auto& atexit_func = __atexit_funcs[i - 1];
|
|
if (atexit_func.func == nullptr)
|
|
continue;
|
|
if (f == nullptr || f == atexit_func.func)
|
|
{
|
|
atexit_func.func(atexit_func.arg);
|
|
atexit_func.func = nullptr;
|
|
}
|
|
}
|
|
};
|
|
|
|
extern "C" int __cxa_guard_acquire(uint64_t* g)
|
|
{
|
|
uint8_t* guard = reinterpret_cast<uint8_t*>(g);
|
|
|
|
for (;;)
|
|
{
|
|
if (BAN::atomic_load(guard[0], BAN::memory_order_acquire))
|
|
return 0;
|
|
|
|
uint8_t expected = 0;
|
|
if (BAN::atomic_compare_exchange(guard[1], expected, 1, BAN::memory_order_acquire))
|
|
{
|
|
if (BAN::atomic_load(guard[0], BAN::memory_order_acquire))
|
|
{
|
|
BAN::atomic_store(guard[1], 0, BAN::memory_order_release);
|
|
return 0;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
while (BAN::atomic_load(guard[1], BAN::memory_order_acquire))
|
|
Kernel::Processor::pause();
|
|
}
|
|
}
|
|
|
|
extern "C" void __cxa_guard_release(uint64_t* g)
|
|
{
|
|
uint8_t* guard = reinterpret_cast<uint8_t*>(g);
|
|
BAN::atomic_store(guard[0], 1, BAN::memory_order_release);
|
|
BAN::atomic_store(guard[1], 0, BAN::memory_order_release);
|
|
}
|
|
|
|
extern "C" void __cxa_guard_abort(uint64_t*)
|
|
{
|
|
Kernel::panic("__cxa_guard_abort");
|
|
}
|