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Kernel: Fix __cxa_guard_* implementations

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Bananymous
2026-08-22 13:27:25 +03:00
parent 67fdd24a19
commit fe2b130915
1 changed files with 29 additions and 15 deletions
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kernel/icxxabi.cpp
+26 -12
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@@ -38,25 +38,39 @@ extern "C" void __cxa_finalize(void* f)
}
};
namespace __cxxabiv1
extern "C" int __cxa_guard_acquire(uint64_t* g)
{
using __guard = uint64_t;
uint8_t* guard = reinterpret_cast<uint8_t*>(g);
extern "C" int __cxa_guard_acquire (__guard* g)
for (;;)
{
uint8_t* byte = reinterpret_cast<uint8_t*>(g);
uint8_t zero = 0;
return __atomic_compare_exchange_n(byte, &zero, 1, false, __ATOMIC_ACQUIRE, __ATOMIC_ACQUIRE);
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;
}
extern "C" void __cxa_guard_release (__guard* g)
{
uint8_t* byte = reinterpret_cast<uint8_t*>(g);
__atomic_store_n(byte, 0, __ATOMIC_RELEASE);
while (BAN::atomic_load(guard[1], BAN::memory_order_acquire))
Kernel::Processor::pause();
}
}
extern "C" void __cxa_guard_abort (__guard*)
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");
}
}