1 files changed, 0 insertions, 68 deletions
diff --git a/lib/mlibc/options/internal/gcc/guard-abi.cpp b/lib/mlibc/options/internal/gcc/guard-abi.cpp
deleted file mode 100644
index 945582a..0000000
--- a/lib/mlibc/options/internal/gcc/guard-abi.cpp
+++ /dev/null
@@ -1,68 +0,0 @@
-
-#include <stddef.h>
-#include <stdint.h>
-#include <string.h>
-
-#include <mlibc/debug.hpp>
-#include <mlibc/internal-sysdeps.hpp>
-
-namespace {
-
-// Itanium ABI static initialization guard.
-struct Guard {
-	// bit of the mutex member variable.
-	// indicates that the mutex is locked.
-	static constexpr int32_t locked = 1;
-
-	void lock() {
-		uint32_t v = 0;
-		if(__atomic_compare_exchange_n(&mutex, &v, Guard::locked, false,
-				__ATOMIC_ACQUIRE, __ATOMIC_RELAXED))
-			return;
-
-		mlibc::sys_libc_log("__cxa_guard_acquire contention");
-		__builtin_trap();
-	}
-
-	void unlock() {
-		__atomic_store_n(&mutex, 0, __ATOMIC_RELEASE);
-	}
-
-	// the first byte's meaning is fixed by the ABI.
-	// it indicates whether initialization has already been completed.
-	uint8_t complete;
-
-	// we use some of the remaining bytes to implement a mutex.
-	uint32_t mutex;
-};
-
-static_assert(sizeof(Guard) == sizeof(int64_t));
-
-} // namespace { }
-
-extern "C" [[ gnu::visibility("hidden") ]] void __cxa_pure_virtual() {
-	mlibc::panicLogger() << "mlibc: Pure virtual function called from IP "
-			<< (void *)__builtin_return_address(0) << frg::endlog;
-}
-
-extern "C" [[ gnu::visibility("hidden") ]] int __cxa_guard_acquire(int64_t *ptr) {
-	auto guard = reinterpret_cast<Guard *>(ptr);
-	guard->lock();
-	// relaxed ordering is sufficient because
-	// Guard::complete is only modified while the mutex is held.
-	if(__atomic_load_n(&guard->complete, __ATOMIC_RELAXED)) {
-		guard->unlock();
-		return 0;
-	}else{
-		return 1;
-	}
-}
-
-extern "C" [[ gnu::visibility("hidden") ]] void __cxa_guard_release(int64_t *ptr) {
-	auto guard = reinterpret_cast<Guard *>(ptr);
-	// do a store-release so that compiler generated code can skip calling
-	// __cxa_guard_acquire by doing a load-acquire on Guard::complete.
-	__atomic_store_n(&guard->complete, 1, __ATOMIC_RELEASE);
-	guard->unlock();
-}
-