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/*
* Copyright (C) 2023 Free Software Foundation
*
* This program 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 2 of the License, or
* (at your option) any later version.
*
* This program 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 the program ; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef COPY_USER_H
#define COPY_USER_H
#include <stdint.h>
#include <sys/types.h>
#include <machine/locore.h>
#include <mach/message.h>
/*
* The copyin_32to64() and copyout_64to32() routines are meant for data types
* that have different size in kernel and user space. They should be independent
* of endianness and hopefully can be reused on all archs.
* These types are e.g.:
* - port names vs port pointers, on a 64-bit kernel
* - memory addresses, on a 64-bit kernel and 32-bit user
*/
static inline int copyin_32to64(const uint32_t *uaddr, uint64_t *kaddr)
{
uint32_t rkaddr;
int ret;
ret = copyin(uaddr, &rkaddr, sizeof(uint32_t));
if (ret)
return ret;
*kaddr = rkaddr;
return 0;
}
static inline int copyout_64to32(const uint64_t *kaddr, uint32_t *uaddr)
{
uint32_t rkaddr=*kaddr;
return copyout(&rkaddr, uaddr, sizeof(uint32_t));
}
static inline int copyin_address(const rpc_vm_offset_t *uaddr, vm_offset_t *kaddr)
{
#ifdef USER32
return copyin_32to64(uaddr, kaddr);
#else /* USER32 */
return copyin(uaddr, kaddr, sizeof(*uaddr));
#endif /* USER32 */
}
static inline int copyout_address(const vm_offset_t *kaddr, rpc_vm_offset_t *uaddr)
{
#ifdef USER32
return copyout_64to32(kaddr, uaddr);
#else /* USER32 */
return copyout(kaddr, uaddr, sizeof(*kaddr));
#endif /* USER32 */
}
static inline int copyin_port(const mach_port_name_t *uaddr, mach_port_t *kaddr)
{
#ifdef __LP64__
return copyin_32to64(uaddr, kaddr);
#else /* __LP64__ */
return copyin(uaddr, kaddr, sizeof(*uaddr));
#endif /* __LP64__ */
}
static inline int copyout_port(const mach_port_t *kaddr, mach_port_name_t *uaddr)
{
#ifdef __LP64__
return copyout_64to32(kaddr, uaddr);
#else /* __LP64__ */
return copyout(kaddr, uaddr, sizeof(*kaddr));
#endif /* __LP64__ */
}
#if defined(__LP64__) && defined(USER32)
/* For 32 bit userland, kernel and user land messages are not the same size. */
size_t msg_usize(const mach_msg_header_t *kmsg);
#else
static inline size_t msg_usize(const mach_msg_header_t *kmsg)
{
return kmsg->msgh_size;
}
#endif /* __LP64__ && USER32 */
#endif /* COPY_USER_H */
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