Commit 27d000d6 authored by Josh Poimboeuf's avatar Josh Poimboeuf Committed by Peter Zijlstra
Browse files

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: default avatarJosh Poimboeuf <jpoimboe@kernel.org>
Signed-off-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/0bf5f4f5978660985037b24c6db49b114374eb4d.1681325924.git.jpoimboe@kernel.org
parent e8deb00c

scripts/objdump-func

+25 −9
Original line number Diff line number Diff line
@@ -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



# 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; } }'
 
FUNCS=("$@")



${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;

		}

	}'