Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
scripts/objdump-func: Support multiple functions
Allow specifying multiple functions on the cmdline. Note this removes
the secret EXTRA_ARGS feature.
While at it, spread out the awk to make it more readable.
Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/0bf5f4f5978660985037b24c6db49b114374eb4d.1681325924.git.jpoimboe@kernel.org
authored by
Josh Poimboeuf
and committed by
Peter Zijlstra
27d000d6
e8deb00c
+24
-8
+24
-8
scripts/objdump-func
+24
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scripts/objdump-func
···
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#
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# Disassemble a single function.
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#
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# usage: objdump-func <file> <func>
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# usage: objdump-func <file> <func> [<func> ...]
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set -o errexit
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set -o nounset
···
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command -v gawk >/dev/null 2>&1 || die "gawk isn't installed"
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usage() {
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echo "usage: objdump-func <file> <func>" >&2
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echo "usage: objdump-func <file> <func> [<func> ...]" >&2
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exit 1
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}
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[[ $# -lt 2 ]] && usage
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OBJ=$1; shift
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FUNC=$1; shift
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FUNCS=("$@")
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# Secret feature to allow adding extra objdump args at the end
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EXTRA_ARGS=$@
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# Note this also matches compiler-added suffixes like ".cold", etc
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${OBJDUMP} -wdr $EXTRA_ARGS $OBJ | gawk -M -v f=$FUNC '/^$/ { P=0; } $0 ~ "<" f "(\\..*)?>:" { P=1; O=strtonum("0x" $1); } { if (P) { o=strtonum("0x" $1); printf("%04x ", o-O); print $0; } }'
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${OBJDUMP} -wdr $OBJ | gawk -M -v _funcs="${FUNCS[*]}" '
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BEGIN { split(_funcs, funcs); }
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/^$/ { func_match=0; }
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/<.*>:/ {
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f = gensub(/.*<(.*)>:/, "\\1", 1);
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for (i in funcs) {
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# match compiler-added suffixes like ".cold", etc
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if (f ~ "^" funcs[i] "(\\..*)?") {
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func_match = 1;
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base = strtonum("0x" $1);
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break;
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}
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}
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}
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{
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if (func_match) {
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addr = strtonum("0x" $1);
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printf("%04x ", addr - base);
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print;
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}
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}'