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Kernel: Remove copy_string_from_user() as it's no longer used

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This commit is contained in:
Andreas Kling 2021-08-14 23:02:48 +02:00
parent 0f6f863382
commit 96d5d017b7
3 changed files with 0 additions and 36 deletions
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29
Kernel/StdLib.cpp
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@ -13,35 +13,6 @@
#include <Kernel/Memory/MemoryManager.h>
#include <Kernel/StdLib.h>
String copy_string_from_user(const char* user_str, size_t user_str_size)
{
bool is_user = Kernel::Memory::is_user_range(VirtualAddress(user_str), user_str_size);
if (!is_user)
return {};
Kernel::SmapDisabler disabler;
void* fault_at;
ssize_t length = Kernel::safe_strnlen(user_str, user_str_size, fault_at);
if (length < 0) {
dbgln("copy_string_from_user({:p}, {}) failed at {} (strnlen)", static_cast<const void*>(user_str), user_str_size, VirtualAddress { fault_at });
return {};
}
if (length == 0)
return String::empty();
char* buffer;
auto copied_string = StringImpl::create_uninitialized((size_t)length, buffer);
if (!Kernel::safe_memcpy(buffer, user_str, (size_t)length, fault_at)) {
dbgln("copy_string_from_user({:p}, {}) failed at {} (memcpy)", static_cast<const void*>(user_str), user_str_size, VirtualAddress { fault_at });
return {};
}
return copied_string;
}
String copy_string_from_user(Userspace<const char*> user_str, size_t user_str_size)
{
return copy_string_from_user(user_str.unsafe_userspace_ptr(), user_str_size);
}
Kernel::KResultOr<NonnullOwnPtr<Kernel::KString>> try_copy_kstring_from_user(Userspace<const char*> user_str, size_t user_str_size)
{
bool is_user = Kernel::Memory::is_user_range(VirtualAddress(user_str), user_str_size);