robin.thoni/ipxe - git rthoni.com

Michael Brown 5350b65a3c [zbin] Use LZMA compression LZMA provides significantly better compression (by ~15%) than the current NRV2B algorithm. We use a raw LZMA stream (aka LZMA1) to avoid the need for code to parse the LZMA2 block headers. We use parameters {lc=2,lp=0,pb=0} to reduce the stack space required by the decompressor to acceptable levels (around 8kB). Using lc=3 or pb=2 would give marginally better compression, but at the cost of substantially increasing the required stack space. The build process now requires the liblzma headers to be present on the build system, since we do not include a copy of an LZMA compressor within the iPXE source tree. The decompressor is written from scratch (based on XZ Embedded) and is entirely self-contained within the iPXE source. The branch-call-jump (BCJ) filter used to improve the compressibility is specific to iPXE. We choose not to use liblzma's built-in BCJ filter since the algorithm is complex and undocumented. Our BCJ filter achieves approximately the same results (on typical iPXE binaries) with a substantially simpler algorithm. Signed-off-by: Michael Brown <mcb30@ipxe.org>		9 年前
contrib	[errdb] Strip platform error code for non-platform-generated errors	11 年前
src	[zbin] Use LZMA compression	9 年前
COPYING	Initial revision	19 年前
COPYRIGHTS	[build] Rename gPXE to iPXE	14 年前
README	[doc] Re-add README file	14 年前

iPXE README File

Quick start guide:

   cd src
   make

For any more detailed instructions, see http://ipxe.org