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49 lines
1.2 KiB
Bash
Executable File
49 lines
1.2 KiB
Bash
Executable File
#!/bin/bash
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#
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# Strip a binary and generate a separate .dbg that gets referred to using
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# .gnu_debuglink.
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#
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set -e
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# Check we have the required arguments
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if [[ $# -ne 3 ]]; then
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cat >2 <<EOF
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usage: make-debuglink <original> <stripped> <debug>
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Take <original>, which contains symbols, strip it to create <stripped>, and
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extract the debug information into a separate <debug> file, adding a
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'.gnu_debuglink' section to <stripped> that points at it.
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EOF
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exit 1
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fi
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# Grab the arguments
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original=$1
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stripped=$2
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debug=$3
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# Create a temporary directory to work in
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tempdir=$(mktemp -d -t tmp.XXXXXXXXXXX)
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function cleanup {
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rm -rf "$tempdir"
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}
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trap cleanup EXIT
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# Construct the debug file
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nm -D "$original" --format=posix --defined-only \
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| awk '{ print $1 }' | sort > "$tempdir/dynsyms"
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nm "$original" --format=posix --defined-only \
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| awk '$2 ~ /[TtD]/ { print $1 }' \
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| sort > "$tempdir/funcsyms"
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comm -13 "$tempdir/dynsyms" "$tempdir/funcsyms" > "$tempdir/keepsyms"
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objcopy --only-keep-debug \
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--remove-section .gdb_index \
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--remove-section .comment \
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--keep-symbols="$tempdir/keepsyms" \
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"$original" "$debug"
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objcopy -S --add-gnu-debuglink="$debug" "$original" "$stripped"
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