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coreboot/util/lar
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Ronald G. Minnich 24a06158ba This is an emergency commit because the zero compression, as 
it stands, is causing coreboot on the alix1c to hang. I don't know why. 

But this patch is the difference between works and hangs. I think 
the memset in the decompress is not using the right start value? Not sure. 

This simple change allows us to fix the zero decompress later, when 
we figure it out. I just lost a few hours to this and I want to make
sure the repo works before I go to bed. 

This fix tested on alix1c. Alix1c now works fine.

Signed-off-by: Ronald G. Minnich <rminnich@gmail.com>
Acked-by: Ronald G. Minnich <rminnich@gmail.com>




git-svn-id: svn://coreboot.org/repository/coreboot-v3@604 f3766cd6-281f-0410-b1cd-43a5c92072e9
2008-02-16 06:38:45 +00:00
..
bootblock.c Now version 3: LinuxBIOS -> coreboot rename. 2008-01-27 18:54:57 +00:00
example.c Now version 3: LinuxBIOS -> coreboot rename. 2008-01-27 18:54:57 +00:00
lar.c Add a zero-fill command to lar. 2008-02-09 21:16:42 +00:00
lar.h This patch adds zero compression for bss segments. One of the reasons 2008-02-15 19:27:13 +00:00
lib.c This patch adds zero compression for bss segments. One of the reasons 2008-02-15 19:27:13 +00:00
lib.h This patch fixes a memory corruption error in lar when compiled on a 64-bit 2008-02-13 17:30:49 +00:00
Makefile Now version 3: LinuxBIOS -> coreboot rename. 2008-01-27 18:54:57 +00:00
README Now version 3: LinuxBIOS -> coreboot rename. 2008-01-27 18:54:57 +00:00
stream.c This is an emergency commit because the zero compression, as 2008-02-16 06:38:45 +00:00

README 

Lightweight Archiver: lar
-----------------------

Table of Contents
  - Introduction
  - Usage
  - Archive format
  - TODO
  - Copyright and License


Introduction
------------

This is a simple archiver, similar to cpio, ar or tar. It was designed and
written for coreboot.

Design goals were
  - minimum overhead
  - maximum fault tolerance
  - simplicity

For a usage example see example.c.

For questions contact Stefan Reinauer <stepan@coresystems.de>.


Usage
-----

Create archive archive.lar containing files file1 ... fileN:

  $ lar c archive.lar file1 ... fileN

Extract files from archive.lar:

  $ lar x archive.lar [file1 ... fileN]

List files in archive:

  $ lar l archive.lar


Archive format
--------------

The rough format is:

 |--------------|
 | header       |
 |--------------|
 | data         |
 |--------------|
 | header       |
 |--------------|
 | data         |
 |--------------|
  ...

Headers have to be 16 byte aligned.

 |----------------------------|
 | magic (8 bytes)            |
 |----------------------------|
 | length (4 bytes)           |
 |----------------------------|
 | checksum (4 bytes)         |
 |----------------------------|
 | offset to blob (4 bytes)   |
 |----------------------------|
 | "path name"                | <-- null terminated, aligned to 16 bytes
 |----------------------------|
 | blob (aligned to 16 bytes) |
 |----------------------------|


TODO
----

  - Reading flash layouts
  - This does not enforce any alignment yet
  - Alignment enforcing will be optional


Copyright and License
---------------------

Copyright (C) 2006-2007 coresystems GmbH
Written by Stefan Reinauer <stepan@coresystems.de> for coresystems GmbH.

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA, 02110-1301 USA

Note: The files lar.h and example.c are dual-licensed. You can choose between:
 - The GNU GPL, version 2, as published by the Free Software Foundation.
 - The revised BSD license (without advertising clause). See lar.h.