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Commit Graph

17 Commits

Author SHA1 Message Date
John Baldwin
7f911abe54 Add support to libkvm for reading vmcores from other architectures.
- Add a kvaddr_type to represent kernel virtual addresses instead of
  unsigned long.
- Add a struct kvm_nlist which is a stripped down version of struct nlist
  that uses kvaddr_t for n_value.
- Add a kvm_native() routine that returns true if an open kvm descriptor
  is for a native kernel and memory image.
- Add a kvm_open2() function similar to kvm_openfiles().  It drops the
  unused 'swapfile' argument and adds a new function pointer argument for
  a symbol resolving function.  Native kernels still use _fdnlist() from
  libc to resolve symbols if a resolver function is not supplied, but cross
  kernels require a resolver.
- Add a kvm_nlist2() function similar to kvm_nlist() except that it uses
  struct kvm_nlist instead of struct nlist.
- Add a kvm_read2() function similar to kvm_read() except that it uses
  kvaddr_t instead of unsigned long for the kernel virtual address.
- Add a new kvm_arch switch of routines needed by a vmcore backend.
  Each backend is responsible for implementing kvm_read2() for a given
  vmcore format.
- Use libelf to read headers from ELF kernels and cores (except for
  powerpc cores).
- Add internal helper routines for the common page offset hash table used
  by the minidump backends.
- Port all of the existing kvm backends to implement a kvm_arch switch and
  to be cross-friendly by using private constants instead of ones that
  vary by platform (e.g. PAGE_SIZE).  Static assertions are present when
  a given backend is compiled natively to ensure the private constants
  match the real ones.
- Enable all of the existing vmcore backends on all platforms.  This means
  that libkvm on any platform should be able to perform KVA translation
  and read data from a vmcore of any platform.

Tested on:	amd64, i386, sparc64 (marius)
Differential Revision:	https://reviews.freebsd.org/D3341
2015-11-27 18:58:26 +00:00
Jilles Tjoelker
886ae81fa3 kvm(3): Mention that some of the functions use sysctl(3) instead of kmem.
Additionally, because of sysctl(3) use (which is generally good), behaviour
for crash dumps differs slightly from behaviour for live kernels and this
will probably never be fixed entirely, so weaken that claim.

MFC after:	1 week
2010-04-25 12:50:30 +00:00
Warner Losh
67e405315d Remove the advertising clause. UCB did this some time ago, but these
files were never updated to reflect that.

MFC After: 2 days
2007-01-08 17:35:36 +00:00
Ruslan Ermilov
1a0a934547 Mechanically kill hard sentence breaks. 2004-07-02 23:52:20 +00:00
Ruslan Ermilov
8a34ef53ab Document that libkvm also uses /dev/kmem, to access KVM. 2004-03-26 08:03:53 +00:00
Philippe Charnier
4cacb61823 The .Fn function
The .Fa argument
2003-03-24 15:58:53 +00:00
Ruslan Ermilov
facc67676f mdoc(7) police: Deal with self-xrefs. 2002-12-24 13:41:48 +00:00
Ruslan Ermilov
ae82896268 Consistently mark std(in|out|err) with .Dv, because that's how they
are marked up in stdio(3), and because they are defined expressions
of type "FILE *".

Approved by:	re
2002-12-04 18:57:46 +00:00
Ruslan Ermilov
753d686d34 mdoc(7) police: s/BSD/.Bx/ where appropriate. 2001-08-14 10:01:54 +00:00
Alexey Zelkin
7f5e8c848c Introduce .Lb macro to libkvm manpages.
Use .Pa macro for "enlighting" path
2000-04-22 16:10:12 +00:00
Peter Wemm
7f3dea244c $Id$ -> $FreeBSD$ 1999-08-28 00:22:10 +00:00
Nik Clayton
fbc400a67a Add $Id$, to make it simpler for members of the translation teams to
track.

The $Id$ line is normally at the bottom of the main comment block in the
man page, separated from the rest of the manpage by an empty comment,
like so;

     .\"    $Id$
     .\"

If the immediately preceding comment is a @(#) format ID marker than the
the $Id$ will line up underneath it with no intervening blank lines.
Otherwise, an additional blank line is inserted.

Approved by:            bde
1999-07-12 20:50:10 +00:00
Bruce Evans
9bcaf304c6 Fixed missing cross reference to kvm_getfiles.
This man page may be overdoing the cross references by referencing
man pages that are just links to other pages that are referenced.

kvm_uread() is still completely undocumented in kvm*.3.
1999-01-23 08:12:12 +00:00
Bruce Evans
9457cf9c59 Fixed unsorting of cross references in previous commit. 1999-01-23 07:34:56 +00:00
Matthew Dillon
e92324a21e Implement kvm_getswapinfo() libkvm function. Will be used by
pstat, top, and systat.
1999-01-22 10:36:04 +00:00
Mike Pritchard
e2cc67ef3c Another round of spelling fixes. 1996-01-30 18:13:11 +00:00
Rodney W. Grimes
58f0484fa2 BSD 4.4 Lite Lib Sources 1994-05-27 05:00:24 +00:00