robin.thoni/ipxe - git rthoni.com

Michael Brown 747e9eb6f3 [lkrnprefix] Allow relocation when no initrd is present Commit 2629b7e ("[pcbios] Inhibit all calls to INT 15,e820 and INT 15,e801 during POST") introduced a regression into .lkrn images when used with no corresponding initrd. Specifically, the semantics of the "maximum address for relocation" value passed to install_prealloc() in %ebp changed so that zero became a special value meaning "inhibit use of INT 15,e820 and INT 15,e801". The %ebp value meaing "no upper limit on relocation" was changed from zero to 0xffffffff, and all prefixes providing fixed values for %ebp were updated to match the new semantics. The .lkrn prefix provides the initrd base address as the maximum address for relocation. When no initrd is present, this address will be zero, and so will unintentionally trigger the "inhibit INT 15,e820 and INT 15,e801" behaviour. Fix by explicitly setting %ebp to 0xffffffff if no initrd is present before calling install_prealloc(). Reported-by: Ján ONDREJ (SAL) <ondrejj@salstar.sk> Tested-by: Ján ONDREJ (SAL) <ondrejj@salstar.sk> Signed-off-by: Michael Brown <mcb30@ipxe.org>		hace 12 años
contrib	[contrib] Enable bochs debug port by default	hace 12 años
src	[lkrnprefix] Allow relocation when no initrd is present	hace 12 años
COPYING	Initial revision	hace 19 años
COPYRIGHTS	[build] Rename gPXE to iPXE	hace 14 años
README	[doc] Re-add README file	hace 14 años

iPXE README File

Quick start guide:

   cd src
   make

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