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| author | Michael Brown | 2014-08-21 16:59:11 +0200 |
|---|---|---|
| committer | Michael Brown | 2014-08-22 16:05:05 +0200 |
| commit | 16e235987fae94e53db293990ad4f2d816b72326 (patch) | |
| tree | f184c3e5ee33aed4696f22d0a04c2d129b36cd96 /src/Makefile.housekeeping | |
| parent | [efi] Dump details of any calls to our dummy block and disk I/O protocols (diff) | |
| download | ipxe-16e235987fae94e53db293990ad4f2d816b72326.tar.gz ipxe-16e235987fae94e53db293990ad4f2d816b72326.tar.xz ipxe-16e235987fae94e53db293990ad4f2d816b72326.zip | |
[romprefix] Do not preserve unused register %di
Since some PnP BIOSes fail to set %es:di to point to the PnP signature
on entry, we identify a PnP BIOS by scanning through the top 64kB of
base memory looking for the PnP structure. We therefore don't
actually use the values of %es:di provided to the initialisation entry
point, and so there is no need to preserve them.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Diffstat (limited to 'src/Makefile.housekeeping')
0 files changed, 0 insertions, 0 deletions