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| author | David S. Miller <davem@davemloft.net> | 2008-05-22 06:50:01 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2008-05-22 06:50:01 +0200 |
| commit | ada44a0430fdd00b3f38aad0aa518e97cb760bd0 (patch) | |
| tree | e06cbde666e77576a152056cf340b889f03257aa | |
| parent | sparc64: Fix stack tracing through trap frames. (diff) | |
| download | linux-ada44a0430fdd00b3f38aad0aa518e97cb760bd0.tar.xz linux-ada44a0430fdd00b3f38aad0aa518e97cb760bd0.zip | |
sparc64: Prevent stack backtrace false positives on trap frames.
When we fully commit to returning back to kernel mode from
a trap, zero out the regs->magic value to prevent false
positives during stack backtraces.
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | arch/sparc64/kernel/rtrap.S | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/sparc64/kernel/rtrap.S b/arch/sparc64/kernel/rtrap.S index 3afacbb5781d..c6fc695fe1fe 100644 --- a/arch/sparc64/kernel/rtrap.S +++ b/arch/sparc64/kernel/rtrap.S @@ -363,6 +363,7 @@ kern_rtt: rdpr %canrestore, %g1 brz,pn %g1, kern_rtt_fill nop kern_rtt_restore: + stw %g0, [%sp + PTREGS_OFF + PT_V9_MAGIC] restore retry |