userspace_access.h

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#pragma once
 
#include "di/function/prelude.h"
#include "di/util/prelude.h"
#include "di/vocab/span/prelude.h"
#include "iris/core/config.h"
#include "iris/core/error.h"
#include "iris/mm/virtual_address.h"
 
#include IRIS_ARCH_INCLUDE(core/userspace_access.h)
 
namespace iris {
auto copy_to_user(di::Span<byte const> kernel_data, byte* userspace_ptr) -> Expected<void>;
auto copy_from_user(di::Span<byte const> userspace_data, byte* kernel_ptr) -> Expected<void>;
 
auto validate_user_region(mm::VirtualAddress userspace_address, usize count, usize size) -> Expected<void>;
 
template<di::concepts::Invocable F>
auto with_userspace_access(F&& function) -> decltype(auto) {
    UserspaceAccessEnabler guard {};
    return di::invoke(di::forward<F>(function));
}
}