225 lines
9.7 KiB
C
225 lines
9.7 KiB
C
/*
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* Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
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*
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* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
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*
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* This file contains Original Code and/or Modifications of Original Code
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* as defined in and that are subject to the Apple Public Source License
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* Version 2.0 (the 'License'). You may not use this file except in
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* compliance with the License. The rights granted to you under the License
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* may not be used to create, or enable the creation or redistribution of,
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* unlawful or unlicensed copies of an Apple operating system, or to
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* circumvent, violate, or enable the circumvention or violation of, any
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* terms of an Apple operating system software license agreement.
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*
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* Please obtain a copy of the License at
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* http://www.opensource.apple.com/apsl/ and read it before using this file.
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*
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* The Original Code and all software distributed under the License are
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* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
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* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
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* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
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* Please see the License for the specific language governing rights and
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* limitations under the License.
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*
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* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
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*/
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/* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
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/*
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* Copyright (c) 1982, 1986, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)uio.h 8.5 (Berkeley) 2/22/94
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*/
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#ifndef _SYS_UIO_INTERNAL_H_
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#define _SYS_UIO_INTERNAL_H_
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#include <sys/appleapiopts.h>
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#ifdef KERNEL_PRIVATE
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#include <sys/uio.h>
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#include <sys/malloc.h>
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#include <sys/param.h>
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/*
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* user / kernel address space type flags.
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* WARNING - make sure to check when adding flags! Be sure new flags
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* don't overlap the definitions in uio.h
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*/
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// UIO_USERSPACE 0 defined in uio.h
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#define UIO_USERISPACE ((enum uio_seg)1)
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// UIO_SYSSPACE 2 defined in uio.h
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#define UIO_PHYS_USERSPACE ((enum uio_seg)3)
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#define UIO_PHYS_SYSSPACE ((enum uio_seg)4)
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// UIO_USERSPACE32 5 defined in uio.h
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#define UIO_USERISPACE32 ((enum uio_seg)6)
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#define UIO_PHYS_USERSPACE32 ((enum uio_seg)7)
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// UIO_USERSPACE64 8 defined in uio.h
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#define UIO_USERISPACE64 ((enum uio_seg)9)
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#define UIO_PHYS_USERSPACE64 ((enum uio_seg)10)
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// UIO_SYSSPACE32 11 defined in uio.h
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// UIO_PHYS_SYSSPACE32 12 reserved, never used. Use UIO_PHYS_SYSSPACE
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// UIO_SYSSPACE64 13 reserved, never used. Use UIO_SYSSPACE
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// UIO_PHYS_SYSSPACE64 14 reserved, never used. Use UIO_PHYS_SYSSPACE
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enum {
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UIOF_USERISPACE = (1 << UIO_USERISPACE),
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UIOF_PHYS_USERSPACE = (1 << UIO_PHYS_USERSPACE),
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UIOF_PHYS_SYSSPACE = (1 << UIO_PHYS_SYSSPACE),
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UIOF_USERISPACE32 = (1 << UIO_USERISPACE32),
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UIOF_PHYS_USERSPACE32 = (1 << UIO_PHYS_USERSPACE32),
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UIOF_USERISPACE64 = (1 << UIO_USERISPACE64),
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UIOF_PHYS_USERSPACE64 = (1 << UIO_PHYS_USERSPACE64),
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};
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__BEGIN_DECLS
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struct user_iovec;
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#ifdef XNU_KERNEL_PRIVATE
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__private_extern__ struct user_iovec * uio_iovsaddr_user( uio_t a_uio );
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__private_extern__ int uio_calculateresid_user(uio_t __attribute((nonnull)) a_uio);
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__private_extern__ uio_t uio_createwithbuffer( int a_iovcount, off_t a_offset, int a_spacetype, int a_iodirection, void *a_buf_p, size_t a_buffer_size );
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__private_extern__ int copyin_user_iovec_array(user_addr_t uaddr, int spacetype, int count, struct user_iovec *dst);
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/*
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* uio_reset_fast - reset an uio_t.
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* Reset the given uio_t to initial values. The uio_t is not fully initialized
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* until all iovecs are added using uio_add_ov calls.
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* The a_iovcount value passed in the uio_create is the maximum number of
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* iovecs you may add.
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* a_spacetype must NOT be UIO_USERSPACE, UIO_SYSSPACE32 or UIO_PHYS_USERSPACE.
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*/
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__private_extern__ void uio_reset_fast( uio_t a_uio,
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off_t a_offset, /* current offset */
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int a_spacetype, /* type of address space */
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int a_iodirection ); /* read or write flag */
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__private_extern__ int uio_copyout_user(const char *c_cp, int n, uio_t uio);
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__private_extern__ int uio_copyin_user(const char *c_cp, int n, uio_t uio);
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__private_extern__ int uio_copyout_sys(const char *c_cp, int n, uio_t uio);
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__private_extern__ int uio_copyin_sys(const char *c_cp, int n, uio_t uio);
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__private_extern__ int uio_copyout_phys_user(const char *c_cp, int n, uio_t uio);
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__private_extern__ int uio_copyin_phys_user(const char *c_cp, int n, uio_t uio);
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__private_extern__ int uio_copyout_phys_sys(const char *c_cp, int n, uio_t uio);
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__private_extern__ int uio_copyin_phys_sys(const char *c_cp, int n, uio_t uio);
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#endif /* XNU_KERNEL_PRIVATE */
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/* use kern_iovec for system space requests */
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struct kern_iovec {
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u_int64_t iov_base; /* Base address; PAC signed, diversified with length. */
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u_int64_t iov_len; /* Length. */
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};
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/* use user_iovec for user space requests */
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struct user_iovec {
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user_addr_t iov_base; /* Base address. */
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user_size_t iov_len; /* Length. */
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};
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/* use user32_iovec/user64_iovec for representing
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* in-memory structures in 32-64 processes during copyin */
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struct user32_iovec {
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uint32_t iov_base; /* Base address. */
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uint32_t iov_len; /* Length. */
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};
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struct user64_iovec {
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uint64_t iov_base; /* Base address. */
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uint64_t iov_len; /* Length. */
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};
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union iovecs {
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struct kern_iovec *kiovp;
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struct user_iovec *uiovp;
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};
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/* WARNING - use accessor calls for uio_iov and uio_resid since these */
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/* fields vary depending on the originating address space. */
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struct uio {
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void * XNU_PTRAUTH_SIGNED_PTR("uio.uio_iovs") uio_iovs; /* current iovec */
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void * XNU_PTRAUTH_SIGNED_PTR("uio.uio_iovbase") uio_iovbase; /* iovec base */
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int uio_max_iovs; /* max number of iovecs this uio_t can hold */
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int uio_iovcnt; /* active iovecs */
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off_t uio_offset;
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enum uio_seg uio_segflg;
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enum uio_rw uio_rw;
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user_size_t uio_resid_64;
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u_int32_t uio_flags;
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};
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/* values for uio_flags */
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#define UIO_FLAGS_INITED 0x00000001
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#define UIO_FLAGS_WE_ALLOCED 0x00000002
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#define UIO_FLAGS_IS_COMPRESSED_FILE 0x00000004
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__END_DECLS
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#define UIO_SIZEOF_IOVS( a_iovcount ) \
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( MAX(sizeof(struct user_iovec), sizeof(struct kern_iovec)) * (a_iovcount) )
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/*
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* UIO_SIZEOF - return the amount of space a uio_t requires to
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* contain the given number of iovecs.
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*/
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#ifndef P2ROUNDUP
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#define P2ROUNDUP(x, align) (-(-((long)x) & -((long)align)))
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#endif
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#define UIO_SIZEOF( a_iovcount ) \
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( P2ROUNDUP(sizeof(struct uio), sizeof(uint64_t)) \
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+ UIO_SIZEOF_IOVS(a_iovcount) )
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/*
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* UIO_STACKBUF - use this macro to declare a stack buffer with the
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* appropriate size an alignment for the given number of iovecs.
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* The resulting buffer can then be passed to uio_createwithbuffer().
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*/
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#define UIO_STACKBUF(name, niov) \
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uint64_t name[P2ROUNDUP(UIO_SIZEOF(niov), sizeof(uint64_t)) \
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/ sizeof(uint64_t)]
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#define UIO_IS_USER_SPACE32( a_uio_t ) \
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( (1 << (a_uio_t)->uio_segflg) & (UIOF_USERSPACE32 | UIOF_PHYS_USERSPACE32 | UIOF_USERISPACE32))
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#define UIO_IS_USER_SPACE64( a_uio_t ) \
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( (1 << (a_uio_t)->uio_segflg) & (UIOF_USERSPACE64 | UIOF_PHYS_USERSPACE64 | UIOF_USERISPACE64))
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#define UIO_IS_USER_SPACE( a_uio_t ) \
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( (1 << (a_uio_t)->uio_segflg) & (UIOF_USERSPACE32 | UIOF_PHYS_USERSPACE32 | UIOF_USERISPACE32 | \
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UIOF_USERSPACE64 | UIOF_PHYS_USERSPACE64 | UIOF_USERISPACE64 | \
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UIOF_USERSPACE | UIOF_PHYS_USERSPACE | UIOF_USERISPACE))
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#define UIO_IS_SYS_SPACE( a_uio_t ) \
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( (1 << (a_uio_t)->uio_segflg) & (UIOF_SYSSPACE | UIOF_PHYS_SYSSPACE | UIOF_SYSSPACE32))
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extern int ureadc(int c, struct uio *uio);
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#endif /* KERNEL_PRIVATE */
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#endif /* !_SYS_UIO_INTERNAL_H_ */
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