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x86, setup: preemptively save/restore edi and ebp around INT 15 E820
authorH. Peter Anvin <hpa@zytor.com>
Sat, 28 Mar 2009 20:53:26 +0000 (13:53 -0700)
committerH. Peter Anvin <hpa@zytor.com>
Sun, 29 Mar 2009 01:18:20 +0000 (18:18 -0700)
Impact: BIOS bugproofing

Since there are BIOSes known to clobber %ebx and %esi for INT 15 E820,
assume there is something out there clobbering %edi and/or %ebp too,
and don't wait for it to fail.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>

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