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authorChris Metcalf <cmetcalf@tilera.com>2012-06-18 13:11:21 -0400
committerChris Metcalf <cmetcalf@tilera.com>2012-06-18 13:11:21 -0400
commit9e0304e388ef0e7495b279ce737c24ad56d20b5d (patch)
tree5f87d2506ff5a1abb823e003c078b5682c593a58 /arch/tile
parent485802a6c524e62b5924849dd727ddbb1497cc71 (diff)
downloadlinux-linaro-stable-9e0304e388ef0e7495b279ce737c24ad56d20b5d.tar.gz
arch/tile: big-endian: properly bswap instruction bundles when backtracing
Instruction bundles are always little-endian, even when running in big-endian mode. I missed this internal bug fix when cherry-picking the big-endian code to return to the community. Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Diffstat (limited to 'arch/tile')
-rw-r--r--arch/tile/kernel/backtrace.c9
1 files changed, 7 insertions, 2 deletions
diff --git a/arch/tile/kernel/backtrace.c b/arch/tile/kernel/backtrace.c
index 9092ce8aa6b4..f8b74ca83b92 100644
--- a/arch/tile/kernel/backtrace.c
+++ b/arch/tile/kernel/backtrace.c
@@ -14,6 +14,7 @@
#include <linux/kernel.h>
#include <linux/string.h>
+#include <asm/byteorder.h>
#include <asm/backtrace.h>
#include <asm/tile-desc.h>
#include <arch/abi.h>
@@ -336,8 +337,12 @@ static void find_caller_pc_and_caller_sp(CallerLocation *location,
bytes_to_prefetch / sizeof(tile_bundle_bits);
}
- /* Decode the next bundle. */
- bundle.bits = prefetched_bundles[next_bundle++];
+ /*
+ * Decode the next bundle.
+ * TILE always stores instruction bundles in little-endian
+ * mode, even when the chip is running in big-endian mode.
+ */
+ bundle.bits = le64_to_cpu(prefetched_bundles[next_bundle++]);
bundle.num_insns =
parse_insn_tile(bundle.bits, pc, bundle.insns);
num_info_ops = bt_get_info_ops(&bundle, info_operands);