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scripts/decode_stacktrace.sh: add '-h' flag

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When no parameters are passed, the usage instructions are presented only
when debuginfod-find is not found.  This makes sense because with
debuginfod none of the positional parameters are needed.  However it means
that users having debuginfod-find installed will have no chance of reading
the usage text without opening the file.

Many programs have a '-h' flag to get the usage, so add such a flag. 
Invoking 'scripts/decode_stacktrace.sh -h' will now show the usage text
and exit.

Link: https://lkml.kernel.org/r/20240823-decode_stacktrace-find_module-improvements-v2-3-d7a57d35558b@bootlin.com
Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Cc: Alexis Lothoré (eBPF Foundation) <alexis.lothore@bootlin.com>
Cc: Konstantin Khlebnikov <koct9i@gmail.com>
Cc: Sasha Levin <sashal@kernel.org>
Cc: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Luca Ceresoli 2024-08-23 10:27:44 +02:00 committed by Andrew Morton
parent a6d05e826d
commit 7e10835989
1 changed files with 5 additions and 1 deletions
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6
scripts/decode_stacktrace.sh
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@ -7,6 +7,7 @@ usage() {
echo "Usage:" echo "Usage:"
echo " $0 -r <release>" echo " $0 -r <release>"
echo " $0 [<vmlinux> [<base_path>|auto [<modules_path>]]]" echo " $0 [<vmlinux> [<base_path>|auto [<modules_path>]]]"
echo " $0 -h"
} }
# Try to find a Rust demangler # Try to find a Rust demangler
@ -33,7 +34,10 @@ READELF=${UTIL_PREFIX}readelf${UTIL_SUFFIX}
ADDR2LINE=${UTIL_PREFIX}addr2line${UTIL_SUFFIX} ADDR2LINE=${UTIL_PREFIX}addr2line${UTIL_SUFFIX}
NM=${UTIL_PREFIX}nm${UTIL_SUFFIX} NM=${UTIL_PREFIX}nm${UTIL_SUFFIX}
if [[ $1 == "-r" ]] ; then if [[ $1 == "-h" ]] ; then
usage
exit 0
elif [[ $1 == "-r" ]] ; then
vmlinux="" vmlinux=""
basepath="auto" basepath="auto"
modpath="" modpath=""