$NetBSD: ufetch.9,v 1.1 2019/04/06 03:06:24 thorpej Exp $
Copyright (c) 2019 The NetBSD Foundation, Inc.
All rights reserved.
This code is derived from software contributed to The NetBSD Foundation
by Jason R. Thorpe.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
.Dd March 18, 2019 .Dt UFETCH 9 .Os .Sh NAME .Nm ufetch , .Nm ufetch_8 , .Nm ufetch_16 , .Nm ufetch_32 , .Nm ufetch_64 , .Nm ufetch_char , .Nm ufetch_short , .Nm ufetch_int , .Nm ufetch_long , .Nm ufetch_ptr .Nd fetch data from user-space .Sh SYNOPSIS n sys/systm.h .Ft int .Fn ufetch_8 "const uint8_t *uaddr" "uint8_t *valp" .Ft int .Fn ufetch_16 "const uint16_t *uaddr" "uint16_t *valp" .Ft int .Fn ufetch_32 "const uint32_t *uaddr" "uint32_t *valp" .Ft int .Fn ufetch_64 "const uint64_t *uaddr" "uint64_t *valp" .Ft int .Fn ufetch_char "const unsigned char *uaddr" "unsigned char *valp" .Ft int .Fn ufetch_short "const unsigned short *uaddr" "unsigned short *valp" .Ft int .Fn ufetch_int "const unsigned int *uaddr" "unsigned int *valp" .Ft int .Fn ufetch_long "const unsigned long *uaddr" "unsigned long *valp" .Ft int .Fn ufetch_ptr "const void **uaddr" "void **valp" .Sh DESCRIPTION The .Nm functions provide a way to fetch the values of single memory cells from user-space. In each case, the value referenced by the user-space address .Ar uaddr is retrieved and stored at the kernel memory location referenced by .Ar valp .
Copyright (c) 2019 The NetBSD Foundation, Inc.
All rights reserved.
This code is derived from software contributed to The NetBSD Foundation
by Jason R. Thorpe.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
.Dd March 18, 2019 .Dt UFETCH 9 .Os .Sh NAME .Nm ufetch , .Nm ufetch_8 , .Nm ufetch_16 , .Nm ufetch_32 , .Nm ufetch_64 , .Nm ufetch_char , .Nm ufetch_short , .Nm ufetch_int , .Nm ufetch_long , .Nm ufetch_ptr .Nd fetch data from user-space .Sh SYNOPSIS n sys/systm.h .Ft int .Fn ufetch_8 "const uint8_t *uaddr" "uint8_t *valp" .Ft int .Fn ufetch_16 "const uint16_t *uaddr" "uint16_t *valp" .Ft int .Fn ufetch_32 "const uint32_t *uaddr" "uint32_t *valp" .Ft int .Fn ufetch_64 "const uint64_t *uaddr" "uint64_t *valp" .Ft int .Fn ufetch_char "const unsigned char *uaddr" "unsigned char *valp" .Ft int .Fn ufetch_short "const unsigned short *uaddr" "unsigned short *valp" .Ft int .Fn ufetch_int "const unsigned int *uaddr" "unsigned int *valp" .Ft int .Fn ufetch_long "const unsigned long *uaddr" "unsigned long *valp" .Ft int .Fn ufetch_ptr "const void **uaddr" "void **valp" .Sh DESCRIPTION The .Nm functions provide a way to fetch the values of single memory cells from user-space. In each case, the value referenced by the user-space address .Ar uaddr is retrieved and stored at the kernel memory location referenced by .Ar valp .
p The .Nm ufetch_64 function is only available on systems employing the .Sq LP64 memory model, which can be determined by testing for the presence of the .Dv _LP64 C preprocessor macro. .Sh RETURN VALUES The .Nm functions return 0 on success and an error number on failure. .Sh SEE ALSO .Xr copy 9 , .Xr ustore 9
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