Copyright (c) 1992, 1993
The Regents of the University of California. All rights reserved.
This code is derived from software developed by the Computer Systems
Engineering group at Lawrence Berkeley Laboratory under DARPA contract
BG 91-66 and contributed to Berkeley.
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.
4. Neither the name of the University nor the names of its contributors
may be used to endorse or promote products derived from this software
without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
@(#)kvm_read.3 8.1 (Berkeley) 6/4/93
$FreeBSD$
.Dd June 4, 1993 .Dt KVM_READ 3 .Os .Sh NAME .Nm kvm_read , .Nm kvm_write .Nd read or write kernel virtual memory .Sh LIBRARY .Lb libkvm .Sh SYNOPSIS n kvm.h .Ft ssize_t .Fn kvm_read "kvm_t *kd" "unsigned long addr" "void *buf" "size_t nbytes" .Ft ssize_t .Fn kvm_write "kvm_t *kd" "unsigned long addr" "const void *buf" "size_t nbytes" .Sh DESCRIPTION The .Fn kvm_read and .Fn kvm_write functions are used to read and write kernel virtual memory (or a crash dump file). See .Fn kvm_open 3 or .Fn kvm_openfiles 3 for information regarding opening kernel virtual memory and crash dumps.
The Regents of the University of California. All rights reserved.
This code is derived from software developed by the Computer Systems
Engineering group at Lawrence Berkeley Laboratory under DARPA contract
BG 91-66 and contributed to Berkeley.
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.
4. Neither the name of the University nor the names of its contributors
may be used to endorse or promote products derived from this software
without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
@(#)kvm_read.3 8.1 (Berkeley) 6/4/93
$FreeBSD$
.Dd June 4, 1993 .Dt KVM_READ 3 .Os .Sh NAME .Nm kvm_read , .Nm kvm_write .Nd read or write kernel virtual memory .Sh LIBRARY .Lb libkvm .Sh SYNOPSIS n kvm.h .Ft ssize_t .Fn kvm_read "kvm_t *kd" "unsigned long addr" "void *buf" "size_t nbytes" .Ft ssize_t .Fn kvm_write "kvm_t *kd" "unsigned long addr" "const void *buf" "size_t nbytes" .Sh DESCRIPTION The .Fn kvm_read and .Fn kvm_write functions are used to read and write kernel virtual memory (or a crash dump file). See .Fn kvm_open 3 or .Fn kvm_openfiles 3 for information regarding opening kernel virtual memory and crash dumps.
p The .Fn kvm_read function transfers .Fa nbytes bytes of data from the kernel space address .Fa addr to .Fa buf . Conversely, .Fn kvm_write transfers data from .Fa buf to .Fa addr . Unlike their SunOS counterparts, these functions cannot be used to read or write process address spaces. .Sh RETURN VALUES Upon success, the number of bytes actually transferred is returned. Otherwise, -1 is returned. .Sh SEE ALSO .Xr kvm 3 , .Xr kvm_close 3 , .Xr kvm_getargv 3 , .Xr kvm_getenvv 3 , .Xr kvm_geterr 3 , .Xr kvm_getprocs 3 , .Xr kvm_nlist 3 , .Xr kvm_open 3 , .Xr kvm_openfiles 3