1 files changed, 0 insertions, 120 deletions
diff --git a/Kernel/Arch/i386/SafeMem.h b/Kernel/Arch/i386/SafeMem.h
deleted file mode 100644
index f66844ce4a..0000000000
--- a/Kernel/Arch/i386/SafeMem.h
+++ /dev/null
@@ -1,120 +0,0 @@
-/*
- * Copyright (c) 2020, the SerenityOS developers.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice, this
- *    list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- *    this list of conditions and the following disclaimer in the documentation
- *    and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
- * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
- * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
- * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include <AK/Atomic.h>
-#include <AK/Optional.h>
-#include <AK/Types.h>
-
-#pragma once
-
-namespace Kernel {
-
-struct RegisterState;
-
-[[nodiscard]] bool safe_memcpy(void* dest_ptr, const void* src_ptr, size_t n, void*& fault_at);
-[[nodiscard]] ssize_t safe_strnlen(const char* str, size_t max_n, void*& fault_at);
-[[nodiscard]] bool safe_memset(void* dest_ptr, int c, size_t n, void*& fault_at);
-[[nodiscard]] Optional<u32> safe_atomic_fetch_add_relaxed(volatile u32* var, u32 val);
-[[nodiscard]] Optional<u32> safe_atomic_exchange_relaxed(volatile u32* var, u32 val);
-[[nodiscard]] Optional<u32> safe_atomic_load_relaxed(volatile u32* var);
-[[nodiscard]] bool safe_atomic_store_relaxed(volatile u32* var, u32 val);
-[[nodiscard]] Optional<bool> safe_atomic_compare_exchange_relaxed(volatile u32* var, u32& expected, u32 val);
-
-[[nodiscard]] ALWAYS_INLINE Optional<u32> safe_atomic_fetch_and_relaxed(volatile u32* var, u32 val)
-{
-    auto expected_value = safe_atomic_load_relaxed(var);
-    if (!expected_value.has_value())
-        return {}; // fault
-    u32& expected = expected_value.value();
-    for (;;) {
-        auto result = safe_atomic_compare_exchange_relaxed(var, expected, expected & val);
-        if (!result.has_value())
-            return {}; // fault
-        if (result.value())
-            return expected; // exchanged
-
-        // This is only so that we don't saturate the bus...
-        AK::atomic_thread_fence(AK::MemoryOrder::memory_order_acquire);
-    }
-}
-
-[[nodiscard]] ALWAYS_INLINE Optional<u32> safe_atomic_fetch_and_not_relaxed(volatile u32* var, u32 val)
-{
-    auto expected_value = safe_atomic_load_relaxed(var);
-    if (!expected_value.has_value())
-        return {}; // fault
-    u32& expected = expected_value.value();
-    for (;;) {
-        auto result = safe_atomic_compare_exchange_relaxed(var, expected, expected & ~val);
-        if (!result.has_value())
-            return {}; // fault
-        if (result.value())
-            return expected; // exchanged
-
-        // This is only so that we don't saturate the bus...
-        AK::atomic_thread_fence(AK::MemoryOrder::memory_order_acquire);
-    }
-}
-
-[[nodiscard]] ALWAYS_INLINE Optional<u32> safe_atomic_fetch_or_relaxed(volatile u32* var, u32 val)
-{
-    auto expected_value = safe_atomic_load_relaxed(var);
-    if (!expected_value.has_value())
-        return {}; // fault
-    u32& expected = expected_value.value();
-    for (;;) {
-        auto result = safe_atomic_compare_exchange_relaxed(var, expected, expected | val);
-        if (!result.has_value())
-            return {}; // fault
-        if (result.value())
-            return expected; // exchanged
-
-        // This is only so that we don't saturate the bus...
-        AK::atomic_thread_fence(AK::MemoryOrder::memory_order_acquire);
-    }
-}
-
-[[nodiscard]] ALWAYS_INLINE Optional<u32> safe_atomic_fetch_xor_relaxed(volatile u32* var, u32 val)
-{
-    auto expected_value = safe_atomic_load_relaxed(var);
-    if (!expected_value.has_value())
-        return {}; // fault
-    u32& expected = expected_value.value();
-    for (;;) {
-        auto result = safe_atomic_compare_exchange_relaxed(var, expected, expected ^ val);
-        if (!result.has_value())
-            return {}; // fault
-        if (result.value())
-            return expected; // exchanged
-
-        // This is only so that we don't saturate the bus...
-        AK::atomic_thread_fence(AK::MemoryOrder::memory_order_acquire);
-    }
-}
-
-bool handle_safe_access_fault(RegisterState& regs, u32 fault_address);
-
-}