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NetBSD src for "user", checkout.sh rev 1a20c504ffecdd86deb35e579adb634837d2178f
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‎lib/libkvm/Makefile

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# $NetBSD: Makefile,v 1.50 2014/08/10 23:39:08 matt Exp $
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# from: @(#)Makefile 8.1 (Berkeley) 6/4/93
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WARNS= 3
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USE_FORT?= yes # used primarily by setgid programs
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USE_SHLIBDIR= yes
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LIB= kvm
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CPPFLAGS+=-DLIBC_SCCS -I${NETBSDSRCDIR}/sys -D_KMEMUSER
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SRCS= kvm.c kvm_file.c kvm_getloadavg.c kvm_proc.c
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# This library should compile to the same thing on all variants of
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# ${MACHINE} with the same ${MACHINE_ARCH} so shared /usr works.
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# If it is necessary to run different code based on ${MACHINE} then
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# the dispatch on ${MACHINE} should be done at run time (see m68k).
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.include <bsd.own.mk>
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.if exists(kvm_${KVM_MACHINE_ARCH}.c)
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SRCS+= kvm_${KVM_MACHINE_ARCH}.c
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.elif exists(kvm_${KVM_MACHINE_CPU}.c)
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SRCS+= kvm_${KVM_MACHINE_CPU}.c
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.elif exists(kvm_${MACHINE_ARCH}.c)
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SRCS+= kvm_${MACHINE_ARCH}.c
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.elif exists(kvm_${MACHINE_CPU}.c)
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SRCS+= kvm_${MACHINE_CPU}.c
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.else
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.BEGIN:
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@echo no kvm_xx.c for ${MACHINE_ARCH} nor ${MACHINE_CPU}
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@false
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.endif
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.if ${MACHINE_ARCH} == "i386"
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LINTFLAGS+=-w
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SRCS+= kvm_i386pae.c # Hook PAE support in the i386 build
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.endif
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# Additional modules needed for m68k
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.if (${MACHINE_ARCH} == "m68k" || ${MACHINE_CPU} == "m68k")
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SRCS+= kvm_m68k_cmn.c kvm_sun2.c kvm_sun3.c kvm_sun3x.c
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.endif
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MAN= kvm.3 kvm_dump.3 kvm_geterr.3 kvm_getfiles.3 kvm_getloadavg.3 \
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kvm_getkernelname.3 \
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kvm_getprocs.3 kvm_nlist.3 kvm_open.3 kvm_read.3 kvm_getlwps.3
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MLINKS+=kvm_getprocs.3 kvm_getargv.3 kvm_getprocs.3 kvm_getenvv.3
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MLINKS+=kvm_getprocs.3 kvm_getproc2.3
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MLINKS+=kvm_getprocs.3 kvm_getargv2.3 kvm_getprocs.3 kvm_getenvv2.3
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MLINKS+=kvm_open.3 kvm_openfiles.3 kvm_open.3 kvm_close.3
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MLINKS+=kvm_read.3 kvm_write.3
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MLINKS+=kvm_dump.3 kvm_dump_mkheader.3 kvm_dump.3 kvm_dump_wrtheader.3
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MLINKS+=kvm_dump.3 kvm_dump_inval.3
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# This fixes building with MACHINE==sparc64, MACHINE_ARCH==sparc
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# XXX: this is a hack, but until the sparc MD headers are separated
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# out from the sparc AD headers, it's the easiest solution.
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#
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.if (${MACHINE_ARCH} == "sparc") # {
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.if !make(obj) && !make(clean) && !make(cleandir)
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.BEGIN:
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@([ -h machine ] || \
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ln -fs ${NETBSDSRCDIR}/sys/arch/sparc/include machine)
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@([ -h sparc ] || ln -fs ${NETBSDSRCDIR}/sys/arch/sparc/include sparc)
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.NOPATH: machine sparc
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.endif
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CLEANFILES+= machine sparc
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CPPFLAGS+= -I.
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.endif # }
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.include <bsd.lib.mk>

‎lib/libkvm/kvm.3

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.\" $NetBSD: kvm.3,v 1.13 2011/09/13 08:53:15 wiz Exp $
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.\"
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.\" Copyright (c) 1992, 1993
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.\" The Regents of the University of California. All rights reserved.
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.\"
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.\" This code is derived from software developed by the Computer Systems
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.\" Engineering group at Lawrence Berkeley Laboratory under DARPA contract
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.\" BG 91-66 and contributed to Berkeley.
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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. 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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.\" @(#)kvm.3 8.1 (Berkeley) 6/4/93
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.\"
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.Dd September 14, 2011
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.Dt KVM 3
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.Os
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.Sh NAME
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.Nm kvm
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.Nd kernel memory interface
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.Sh LIBRARY
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.Lb libkvm
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.Sh DESCRIPTION
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The
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.Nm
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library provides a uniform interface for accessing kernel virtual memory
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images, including live systems and crash dumps.
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Access to live systems is via
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.Pa /dev/mem
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while crash dumps can be examined via the core file generated by
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.Xr savecore 8 .
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The interface behaves identically in both cases.
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Memory can be read and written, kernel symbol addresses can be
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looked up efficiently, and information about user processes can
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be gathered.
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.Pp
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.Fn kvm_open
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is first called to obtain a descriptor for all subsequent calls.
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.Sh FILES
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.Bl -tag -width /dev/mem -compact
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.It Pa /dev/mem
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interface to physical memory
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.El
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.Sh COMPATIBILITY
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The kvm interface was first introduced in SunOS.
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A considerable number of programs have been developed that use this
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interface, making backward compatibility highly desirable.
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In most respects, the Sun kvm interface is consistent and clean.
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Accordingly, the generic portion of the interface (i.e.,
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.Fn kvm_open ,
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.Fn kvm_close ,
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.Fn kvm_read ,
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.Fn kvm_write ,
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and
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.Fn kvm_nlist )
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has been incorporated into the
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.Bx
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interface.
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Indeed, many kvm applications (i.e., debuggers and statistical monitors)
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use only this subset of the interface.
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.Pp
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The process interface was not kept.
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This is not a portability issue since any code that manipulates
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processes is inherently machine dependent.
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.Pp
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Finally, the Sun kvm error reporting semantics are poorly defined.
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The library can be configured either to print errors to stderr automatically,
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or to print no error messages at all.
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In the latter case, the nature of the error cannot be determined.
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To overcome this, the
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.Bx
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interface includes a routine,
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.Xr kvm_geterr 3 ,
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to return (not print out) the error message corresponding to the most
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recent error condition on the given descriptor.
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.Sh SEE ALSO
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.Xr kvm_close 3 ,
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.Xr kvm_getargv 3 ,
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.Xr kvm_getenvv 3 ,
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.Xr kvm_geterr 3 ,
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.Xr kvm_getkernelname 3 ,
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.Xr kvm_getloadavg 3 ,
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.Xr kvm_getlwps 3 ,
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.Xr kvm_getprocs 3 ,
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.Xr kvm_nlist 3 ,
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.Xr kvm_open 3 ,
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.Xr kvm_openfiles 3 ,
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.Xr kvm_read 3 ,
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.Xr kvm_write 3

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