scripts/decode_stacktrace.sh: add '-h' flag
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>
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@ -7,6 +7,7 @@ usage() {
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echo "Usage:"
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echo " $0 -r <release>"
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echo " $0 [<vmlinux> [<base_path>|auto [<modules_path>]]]"
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echo " $0 -h"
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}
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# Try to find a Rust demangler
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@ -33,7 +34,10 @@ READELF=${UTIL_PREFIX}readelf${UTIL_SUFFIX}
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ADDR2LINE=${UTIL_PREFIX}addr2line${UTIL_SUFFIX}
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NM=${UTIL_PREFIX}nm${UTIL_SUFFIX}
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if [[ $1 == "-r" ]] ; then
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if [[ $1 == "-h" ]] ; then
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usage
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exit 0
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elif [[ $1 == "-r" ]] ; then
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vmlinux=""
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basepath="auto"
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modpath=""
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