Jorn Engel <joern@wohnheim.fh-wedel.de>




---

 25-akpm/Makefile              |    5 ++
 25-akpm/scripts/checkstack.pl |   98 ++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 103 insertions(+)

diff -puN Makefile~checkstack-target Makefile
--- 25/Makefile~checkstack-target	Fri May 14 15:38:25 2004
+++ 25-akpm/Makefile	Fri May 14 16:47:22 2004
@@ -1066,6 +1066,11 @@ buildcheck:
 endif #ifeq ($(config-targets),1)
 endif #ifeq ($(mixed-targets),1)
 
+.PHONY: checkstack
+checkstack:
+	$(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
+	$(PERL) scripts/checkstack.pl $(ARCH)
+
 # FIXME Should go into a make.lib or something 
 # ===========================================================================
 
diff -puN /dev/null scripts/checkstack.pl
--- /dev/null	Thu Apr 11 07:25:15 2002
+++ 25-akpm/scripts/checkstack.pl	Fri May 14 15:38:25 2004
@@ -0,0 +1,98 @@
+#!/usr/bin/perl
+
+#	Check the stack usage of functions
+#
+#	Copyright Joern Engel <joern@wh.fh-wedel.de>
+#	Inspired by Linus Torvalds
+#	Original idea maybe from Keith Owens
+#	s390 port and big speedup by Arnd Bergmann <arnd@bergmann-dalldorf.de>
+#	Mips port by Juan Quintela <quintela@mandrakesoft.com>
+#	IA64 port via Andreas Dilger
+#	Arm port by Holger Schurig
+#
+#	Usage:
+#	objdump -d vmlinux | stackcheck_ppc.pl [arch]
+#
+#	TODO :	Port to all architectures (one regex per arch)
+
+# check for arch
+#
+# $re is used for three matches:
+# $& (whole re) matches the complete objdump line with the stack growth
+# $1 (first bracket) matches the code that will be displayed in the output
+# $2 (second bracket) matches the size of the stack growth
+#
+# use anything else and feel the pain ;)
+{
+	my $arch = shift;
+	if ($arch eq "") {
+		$arch = `uname -m`;
+	}
+
+	$x	= "[0-9a-f]";	# hex character
+	$xs	= "[0-9a-f ]";	# hex character or space
+	if ($arch =~ /^arm$/) {
+		#c0008ffc:	e24dd064	sub	sp, sp, #100	; 0x64
+		$re = qr/.*(sub.*sp, sp, #(([0-9]{2}|[3-9])[0-9]{2}))/o;
+	} elsif ($arch =~ /^i[3456]86$/) {
+		#c0105234:       81 ec ac 05 00 00       sub    $0x5ac,%esp
+		$re = qr/^.*(sub    \$(0x$x{3,5}),\%esp)$/o;
+	} elsif ($arch =~ /^ia64$/) {
+		#e0000000044011fc:       01 0f fc 8c     adds r12=-384,r12
+		$re = qr/.*(adds.*r12=-(([0-9]{2}|[3-9])[0-9]{2}),r12)/o;
+	} elsif ($arch =~ /^mips64$/) {
+		#8800402c:       67bdfff0        daddiu  sp,sp,-16
+		$re = qr/.*(daddiu.*sp,sp,-(([0-9]{2}|[3-9])[0-9]{2}))/o;
+	} elsif ($arch =~ /^mips$/) {
+		#88003254:       27bdffe0        addiu   sp,sp,-32
+		$re = qr/.*(addiu.*sp,sp,-(([0-9]{2}|[3-9])[0-9]{2}))/o;
+	} elsif ($arch =~ /^ppc$/) {
+		#c00029f4:       94 21 ff 30     stwu    r1,-208(r1)
+		$re = qr/.*(stwu.*r1,-($x{3,5})\(r1\))/o;
+	} elsif ($arch =~ /^s390x?$/) {
+		#   11160:       a7 fb ff 60             aghi   %r15,-160
+		$re = qr/.*(ag?hi.*\%r15,-(([0-9]{2}|[3-9])[0-9]{2}))/o;
+	} else {
+		print("wrong or unknown architecture\n");
+		exit
+	}
+}
+
+sub bysize($) {
+	($asize = $a) =~ s/$re/\2/;
+	($bsize = $b) =~ s/$re/\2/;
+	$asize = hex($asize) if ($asize =~ /^0x/);
+	$bsize = hex($bsize) if ($bsize =~ /^0x/);
+	$bsize <=> $asize
+}
+
+#
+# main()
+#
+$funcre = qr/^$x* \<(.*)\>:$/;
+while ($line = <STDIN>) {
+	if ($line =~ m/$funcre/) {
+		($func = $line) =~ s/$funcre/\1/;
+		chomp($func);
+	}
+	if ($line =~ m/$re/) {
+		(my $addr = $line) =~ s/^($xs{8}).*/0x\1/o;
+		chomp($addr);
+
+		my $intro = "$addr $func:";
+		my $padlen = 56 - length($intro);
+		while ($padlen > 0) {
+			$intro .= '	';
+			$padlen -= 8;
+		}
+		(my $code = $line) =~ s/$re/\1/;
+
+		$stack[@stack] = "$intro $code";
+	}
+}
+
+@sortedstack = sort bysize @stack;
+
+foreach $i (@sortedstack) {
+	print("$i");
+}

_