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Kernel: Implement safe_* memory access functions for x86_64

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Gunnar Beutner 2021-06-27 14:12:55 +02:00 • committed by Andreas Kling
parent 79ab9cce18
commit df530941cc
4 changed files with 57 additions and 120 deletions
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89
Kernel/Arch/x86/x86_64/SafeMem.cpp
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@ -1,89 +0,0 @@
/*
* Copyright (c) 2021, Gunnar Beutner <gbeutner@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <Kernel/Arch/x86/SafeMem.h>
#define CODE_SECTION(section_name) __attribute__((section(section_name)))
namespace Kernel {
CODE_SECTION(".text.safemem")
NEVER_INLINE bool safe_memcpy(void* dest_ptr, const void* src_ptr, size_t n, void*& fault_at)
{
(void)dest_ptr;
(void)src_ptr;
(void)n;
(void)fault_at;
TODO();
}
CODE_SECTION(".text.safemem")
NEVER_INLINE ssize_t safe_strnlen(const char* str, size_t max_n, void*& fault_at)
{
(void)str;
(void)max_n;
(void)fault_at;
TODO();
}
CODE_SECTION(".text.safemem")
NEVER_INLINE bool safe_memset(void* dest_ptr, int c, size_t n, void*& fault_at)
{
(void)dest_ptr;
(void)c;
(void)n;
(void)fault_at;
TODO();
}
CODE_SECTION(".text.safemem.atomic")
NEVER_INLINE Optional<u32> safe_atomic_fetch_add_relaxed(volatile u32* var, u32 val)
{
(void)var;
(void)val;
TODO();
}
CODE_SECTION(".text.safemem.atomic")
NEVER_INLINE Optional<u32> safe_atomic_exchange_relaxed(volatile u32* var, u32 val)
{
(void)var;
(void)val;
TODO();
}
CODE_SECTION(".text.safemem.atomic")
NEVER_INLINE Optional<u32> safe_atomic_load_relaxed(volatile u32* var)
{
(void)var;
TODO();
}
CODE_SECTION(".text.safemem.atomic")
NEVER_INLINE bool safe_atomic_store_relaxed(volatile u32* var, u32 val)
{
(void)var;
(void)val;
TODO();
}
CODE_SECTION(".text.safemem.atomic")
NEVER_INLINE Optional<bool> safe_atomic_compare_exchange_relaxed(volatile u32* var, u32& expected, u32 val)
{
(void)var;
(void)expected;
(void)val;
TODO();
}
bool handle_safe_access_fault(RegisterState& regs, u32 fault_address)
{
(void)regs;
(void)fault_address;
TODO();
}
}