sparc64: Prevent stack backtrace false positives on trap frames. · ada44a0430 - Gogs

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>

David S. Miller 17 years ago

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14d2c68baa

commit

ada44a0430

1 changed files with 1 additions and 0 deletions

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arch/sparc64/kernel/rtrap.S
							 
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				@@ -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