x86, setup: preemptively save/restore edi and ebp around INT 15 E820

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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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This commit is contained in:

H. Peter Anvin 2009-03-28 13:53:26 -07:00

parent 01522df346

commit 32ec7fd08b

1 changed files with 5 additions and 4 deletions

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arch/x86/boot/memory.c

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