x86: push old stack address on irqstack for unwinder

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Impact: Fixes dumpstack and KDB on 64 bits

This re-adds the old stack pointer to the top of the irqstack to help
with unwinding.  It was removed in commit d99015b1ab
as part of the save_args out-of-line work.

Both dumpstack and KDB require this information.

Signed-off-by: Martin Hicks <mort@sgi.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>

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Martin Hicks 2009-01-30 10:50:54 -06:00 • committed by H. Peter Anvin

parent 10b888d6ce

commit a67798cd7b

1 changed files with 1 additions and 0 deletions

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arch/x86/kernel/entry_64.S

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