From e260fe01fa39eddb05bd8b70fad5bc9a129648f2 Mon Sep 17 00:00:00 2001
From: Robert Jarzmik <robert.jarzmik@free.fr>
Date: Fri, 4 Sep 2015 15:43:26 -0700
Subject: [PATCH] scripts: decode_stacktrace: fix ARM architecture decoding
Fix the stack decoder for the ARM architecture.
An ARM stack is designed as :
[ 81.547704] [<c023eb04>] (bucket_find_contain) from [<c023ec88>] (check_sync+0x40/0x4f8)
[ 81.559668] [<c023ec88>] (check_sync) from [<c023f8c4>] (debug_dma_sync_sg_for_cpu+0x128/0x194)
[ 81.571583] [<c023f8c4>] (debug_dma_sync_sg_for_cpu) from [<c0327dec>] (__videobuf_s
The current script doesn't expect the symbols to be bound by
parenthesis, and triggers the following errors :
awk: cmd. line:1: error: Unmatched ( or \(: / (check_sync$/
[ 81.547704] (bucket_find_contain) from (check_sync+0x40/0x4f8)
Fix it by chopping starting and ending parenthesis from the each symbol
name.
As a side note, this probably comes from the function
dump_backtrace_entry(), which is implemented differently for each
architecture. That makes a single decoding script a bit a challenge.
Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr>
Cc: Sasha Levin <sasha.levin@oracle.com>
Cc: Russell King <rmk+kernel@arm.linux.org.uk>
Cc: Michal Marek <mmarek@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
scripts/decode_stacktrace.sh | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/scripts/decode_stacktrace.sh b/scripts/decode_stacktrace.sh
index 515c4c00e957..00d6d53c2681 100755
--- a/scripts/decode_stacktrace.sh
+++ b/scripts/decode_stacktrace.sh
@@ -14,11 +14,14 @@ declare -A cache
parse_symbol() {
# The structure of symbol at this point is:
- # [name]+[offset]/[total length]
+ # ([name]+[offset]/[total length])
#
# For example:
# do_basic_setup+0x9c/0xbf
+ # Remove the englobing parenthesis
+ symbol=${symbol#\(}
+ symbol=${symbol%\)}
# Strip the symbol name so that we could look it up
local name=${symbol%+*}
--
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