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sortix--sortix/kernel/copy.cpp
2014-03-01 14:37:41 +01:00

76 lines
1.9 KiB
C++

/*******************************************************************************
Copyright(C) Jonas 'Sortie' Termansen 2012, 2014.
This file is part of Sortix.
Sortix is free software: you can redistribute it and/or modify it under the
terms of the GNU General Public License as published by the Free Software
Foundation, either version 3 of the License, or (at your option) any later
version.
Sortix is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
details.
You should have received a copy of the GNU General Public License along with
Sortix. If not, see <http://www.gnu.org/licenses/>.
copy.cpp
The context for io operations: who made it, how should data be copied, etc.
*******************************************************************************/
#include <string.h>
#include <sortix/kernel/copy.h>
#include <sortix/kernel/kernel.h>
#include <sortix/kernel/string.h>
namespace Sortix {
// TODO: These are currently insecure, please check userspace tables before
// moving data to avoid security problems.
bool CopyToUser(void* userdst, const void* ksrc, size_t count)
{
memcpy(userdst, ksrc, count);
return true;
}
bool CopyFromUser(void* kdst, const void* usersrc, size_t count)
{
memcpy(kdst, usersrc, count);
return true;
}
bool CopyToKernel(void* kdst, const void* ksrc, size_t count)
{
memcpy(kdst, ksrc, count);
return true;
}
bool CopyFromKernel(void* kdst, const void* ksrc, size_t count)
{
memcpy(kdst, ksrc, count);
return true;
}
bool ZeroKernel(void* kdst, size_t count)
{
memset(kdst, 0, count);
return true;
}
bool ZeroUser(void* userdst, size_t count)
{
return ZeroKernel(userdst, count);
}
char* GetStringFromUser(const char* str)
{
return String::Clone(str);
}
} // namespace Sortix