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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
This commit is contained in:
Josh Poimboeuf 2023-04-12 12:03:16 -07:00 committed by Peter Zijlstra
parent e8deb00c0c
commit 27d000d635
1 changed files with 24 additions and 8 deletions
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32
scripts/objdump-func
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@ -3,7 +3,7 @@
#
# Disassemble a single function.
#
# usage: objdump-func <file> <func>
# usage: objdump-func <file> <func> [<func> ...]
set -o errexit
set -o nounset
@ -13,17 +13,33 @@ OBJDUMP="${CROSS_COMPILE:-}objdump"
command -v gawk >/dev/null 2>&1 || die "gawk isn't installed"
usage() {
echo "usage: objdump-func <file> <func>" >&2
echo "usage: objdump-func <file> <func> [<func> ...]" >&2
exit 1
}
[[ $# -lt 2 ]] && usage
OBJ=$1; shift
FUNC=$1; shift
FUNCS=("$@")
# Secret feature to allow adding extra objdump args at the end
EXTRA_ARGS=$@
# Note this also matches compiler-added suffixes like ".cold", etc
${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; } }'
${OBJDUMP} -wdr $OBJ | gawk -M -v _funcs="${FUNCS[*]}" '
BEGIN { split(_funcs, funcs); }
/^$/ { func_match=0; }
/<.*>:/ {
f = gensub(/.*<(.*)>:/, "\\1", 1);
for (i in funcs) {
# match compiler-added suffixes like ".cold", etc
if (f ~ "^" funcs[i] "(\\..*)?") {
func_match = 1;
base = strtonum("0x" $1);
break;
}
}
}
{
if (func_match) {
addr = strtonum("0x" $1);
printf("%04x ", addr - base);
print;
}
}'