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0e4e809602
The improvements are: - can get the kld info from core files via kvm(3); - can use kldstat(2) directly, which is a piece of cake; - can use .symbols or whatever, which allows for use by non-developers when reporting system crashes -- now asf(8) can be mentioned in the handbook at last; - speed (no more double fts(3) per loaded module); - various bugs fixed. At the same time, the new asf(8) should stay compatible with the old one, bar bugs. Perhaps some defaults may be changed later to match today's state of affairs. Reviewed by: grog MFC after: 1 month Sponsored by: RiNet (Cronyx Plus LLC)
173 lines
4.3 KiB
Groff
173 lines
4.3 KiB
Groff
.\" Copyright (c) 2003 Greg Lehey. 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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.\"
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.\" This software is provided by Greg Lehey ``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 Greg Lehey 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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.\" $FreeBSD$
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.\"
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.Dd June 18, 2006
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.Os
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.Dt ASF 8
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.Sh NAME
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.Nm asf
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.Nd add symbol files
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.Sh SYNOPSIS
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.Nm
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.Op Fl afKksVx
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.Op Fl M Ar core
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.Op Fl N Ar system
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.Op Fl o Ar outfile
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.Op Fl X Ar suffix
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.Op Ar modules-path Op Ar outfile
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.Sh DESCRIPTION
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By default,
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.Nm
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reads
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.Xr kldstat 8
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output from standard input and writes to the
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.Pa \&.asf
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file a list of
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.Xr gdb 1
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commands to add symbol files from KLDs in subdirectories of the subdirectory
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.Pa modules
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of the current directory, which is intended to be a kernel build directory.
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This allows
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.Xr gdb 1
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to load the symbols into the debugging environment.
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.Pp
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If
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.Ar modules-path
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is specified,
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.Nm
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uses it for the modules directory instead of the default
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.Pa modules .
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This is useful when building in a non-standard location (i.e., not
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.Pa /usr/src
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and
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.Pa /usr/obj ) .
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.Pp
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If
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.Ar outfile
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is specified,
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.Nm
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writes to it instead of
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.Pa .asf .
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If
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.Ar outfile
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is a single dash
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.Pq Sq \&- ,
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the standard output is used.
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.Sh OPTIONS
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The following options modify the function of
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.Nm :
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.Bl -tag -width indent
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.It Fl a
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When writing to an explicit
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.Ar outfile ,
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append to the file rather than overwriting it.
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.It Fl f
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Instead of trying to simplistically guess the path for each module, perform
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a traversal in the same way that
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.Xr find 1
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does to locate an exact path for each module, no matter where in
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.Ar modules-path
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it is located.
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.It Fl K
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Instead of reading from standard input, use the conventional
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system interface to get the list of modules currently loaded.
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.It Fl k
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Instead of reading from standard input, start a
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.Xr kldstat 8
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and read the information from it.
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.It Fl M
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Specify the core file for
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.Xr kvm 3 .
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Impiles
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.Fl V .
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.It Fl N
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Specify the system file for
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.Xr kvm 3 .
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Implies
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.Fl V .
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.It Fl o
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Specify the file for
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.Nm
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to write or append its output to.
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If
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.Ar outfile
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is a single dash
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.Pq Sq \&- ,
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the standard output is used.
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.It Fl s
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Do not prepend a (guessed) subdirectory of the module path.
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.It Fl V
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Instead of reading from standard input, use the
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.Xr kvm 3
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interface to get the list of modules.
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This interface allows for inspecting system crash dumps,
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as well as the live system.
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The
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.Fl M
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and
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.Fl N
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options will be of use if inspecting a crash dump.
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Elevated privileges, e.g., those of a superuser,
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may be needed to use this option.
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.It Fl X
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Add
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.Ar suffix
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to the list of suffixes
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.Nm
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tries to append to KLD file names.
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The default list consists of
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.Pa .debug ,
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.Pa .symbols ,
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and the null suffix.
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The null suffix always stays at the list tail, after the suffix added.
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Should it be needed in the middle of the list,
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a blank suffix can be specified to
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.Fl X
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instead.
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.It Fl x
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Clear the list of suffixes
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.Nm
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tries to append to KLD file names.
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Only the null suffix is left in the list.
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.El
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.Sh SEE ALSO
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.Xr gdb 1 ,
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.Xr kvm 3 ,
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.Xr kld 4 ,
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.Xr kldstat 8
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.Sh HISTORY
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The
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.Nm
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utility first appeared in
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.Fx 5.2 .
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.Sh AUTHORS
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.An Greg Lehey Aq grog@FreeBSD.org
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.Sh BUGS
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Module paths are guessed in a rather naive way by default.
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It is likely to lag behind the changes to the build tree layout.
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Using
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.Fl f
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is recommended.
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