arch/tile: support new info op generated by compiler

This just syncs the backtracing support in the kernel to the upstream backtrace library. Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
git-mirror · Oct 15, 2010 · c569cac · c569cac
1 parent 2950766
commit c569cac
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Showing 2 changed files with 8 additions and 1 deletion.
diff --git a/arch/tile/include/asm/backtrace.h b/arch/tile/include/asm/backtrace.h
@@ -146,7 +146,10 @@ enum {
 
 	CALLER_SP_IN_R52_BASE = 4,
 
-	CALLER_SP_OFFSET_BASE = 8
+	CALLER_SP_OFFSET_BASE = 8,
+
+	/* Marks the entry point of certain functions. */
+	ENTRY_POINT_INFO_OP = 16
 };
 
 

diff --git a/arch/tile/kernel/backtrace.c b/arch/tile/kernel/backtrace.c
@@ -369,6 +369,10 @@ static void find_caller_pc_and_caller_sp(CallerLocation *location,
 					/* Weird; reserved value, ignore it. */
 					continue;
 				}
+				if (info_operand & ENTRY_POINT_INFO_OP)	{
+					/* This info op is ignored by the backtracer. */
+					continue;
+				}
 
 				/* Skip info ops which are not in the
 				 * "one_ago" mode we want right now.