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Michael Brown c1595129b5 [bios] Fix screen clearing on even more buggy BIOSes

Some BIOSes (observed with a ProLiant DL360p Gen8 SE) perform no range
checking whatsoever on the parameters passed to INT10,06 and will
therefore happily write to an area beyond the end of video RAM.  The
area immediately following the video RAM tends to be the VGA BIOS ROM
image.  Overwriting the VGA BIOS leads to an interesting variety of
crashes and reboots.

Fix by specifying an exact width and height to be cleared, rather than
passing in large values and relying upon the BIOS to truncate them to
the appropriate range.

Reported-by: Alex Davies <adavies@jumptrading.com>
Signed-off-by: Michael Brown <mcb30@ipxe.org>

2014-03-21 16:56:34 +00:00

contrib

[errdb] Strip platform error code for non-platform-generated errors

2013-04-29 15:36:32 +01:00

src

[bios] Fix screen clearing on even more buggy BIOSes

2014-03-21 16:56:34 +00:00

COPYING

Initial revision

2005-05-17 16:44:57 +00:00

COPYRIGHTS

[build] Rename gPXE to iPXE

2010-04-19 23:43:39 +01:00

README

[doc] Re-add README file

2010-05-28 00:03:47 +01:00

README

iPXE README File

Quick start guide:

   cd src
   make

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

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