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arch/tile: big-endian: properly bswap instruction bundles when backtracing

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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>
This commit is contained in:
Chris Metcalf 2012-06-18 13:11:21 -04:00
parent 485802a6c5
commit 9e0304e388
1 changed files with 7 additions and 2 deletions
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9
arch/tile/kernel/backtrace.c
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@ -14,6 +14,7 @@
#include <linux/kernel.h> #include <linux/kernel.h>
#include <linux/string.h> #include <linux/string.h>
#include <asm/byteorder.h>
#include <asm/backtrace.h> #include <asm/backtrace.h>
#include <asm/tile-desc.h> #include <asm/tile-desc.h>
#include <arch/abi.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); 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 = bundle.num_insns =
parse_insn_tile(bundle.bits, pc, bundle.insns); parse_insn_tile(bundle.bits, pc, bundle.insns);
num_info_ops = bt_get_info_ops(&bundle, info_operands); num_info_ops = bt_get_info_ops(&bundle, info_operands);