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[vram] Add "vram" built-in setting to dump video RAM

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The "vram" setting returns the (Base64-encoded) contents of video RAM,
and can be used to capture a screenshot.  For example: after running
memtest.0 and encountering an error, the output can be captured and
sent to a remote server for later diagnosis:

  #!ipxe
  chain -a http://server/memtest.0 && goto ok || goto bad
  :bad
  params
  param errno ${errno}
  param vram ${vram}
  chain -a http://server/report.php##params
  :ok

Inspired-by: Christian Nilsson <nikize@gmail.com>
Originally-implemented-by: Christian Nilsson <nikize@gmail.com>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2015-04-24 16:05:59 +01:00
parent dc15a5a779
commit a25a16d4ad
3 changed files with 76 additions and 0 deletions
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src/config/settings.h
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@@ -13,6 +13,7 @@ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
//#define CPUID_SETTINGS /* CPUID settings */
//#define MEMMAP_SETTINGS /* Memory map settings */
//#define VMWARE_SETTINGS /* VMware GuestInfo settings */
//#define VRAM_SETTINGS /* Video RAM dump settings */
#include <config/named.h>
#include NAMED_CONFIG(settings.h)