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>

diff --git a/arch/tile/include/asm/backtrace.h b/arch/tile/include/asm/backtrace.h
index 758ca46..f18887d 100644 (file)
--- 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
index d3c41c1..55a6a74 100644 (file)
--- 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.