| commit | ff82c319e6327b12cd94c5c57754abff243ab3e4 | |
| author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | |
| Tue, 8 Jun 2010 00:58:58 +0000 (8 10:58 +1000) | ||
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | |
| Wed, 14 Jul 2010 04:13:51 +0000 (14 14:13 +1000) | ||
| tree | 9545c320549d37f6f9bf99b6ea3eacd6e549706a | treesnapshot (tar.gz zip) |
| parent | 34d97e07cc81ab6f1e63696127cc7a5d2c4fce4b | commitdiff |
powerpc/book3e: Fix single step when using HW page tables
We patch the TLB miss exception vectors to point to alternate
functions when using HW page table on BookE.
However, we were patching in a new branch in the first instruction
of the exception handler instead of the second one, thus overriding
the nop that is in the first instruction.
This cause problems when single stepping as we rely on that nop for
the single step to stop properly within the exception vector range
rather than on the target of the branch.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
We patch the TLB miss exception vectors to point to alternate
functions when using HW page table on BookE.
However, we were patching in a new branch in the first instruction
of the exception handler instead of the second one, thus overriding
the nop that is in the first instruction.
This cause problems when single stepping as we rely on that nop for
the single step to stop properly within the exception vector range
rather than on the target of the branch.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| arch/powerpc/kernel/exceptions-64e.S | diffblobblamehistory | |
| arch/powerpc/mm/tlb_nohash.c | diffblobblamehistory |