checkstack: pull from upstream

merge upstream changes

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

1 files changed, 75 insertions, 32 deletions

diff --git a/scripts/checkstack.pl b/scripts/checkstack.pl
index b5980a2e3..7833554c8 100755
--- a/scripts/checkstack.pl
+++ b/scripts/checkstack.pl
@@ -1,10 +1,11 @@
-#!/usr/bin/perl
+#!/usr/bin/env perl
+# SPDX-License-Identifier: GPL-2.0
 
 # Stolen from Linux kernel :)
 
 #	Check the stack usage of functions
 #
-#	Copyright Joern Engel <joern@wh.fh-wedel.de>
+#	Copyright Joern Engel <joern@lazybastard.org>
 #	Inspired by Linus Torvalds
 #	Original idea maybe from Keith Owens
 #	s390 port and big speedup by Arnd Bergmann <arnd@bergmann-dalldorf.de>
@@ -14,41 +15,57 @@
 #	sh64 port by Paul Mundt
 #	Random bits by Matt Mackall <mpm@selenic.com>
 #	M68k port by Geert Uytterhoeven and Andreas Schwab
+#	blackfin port by Alex Landau
+#	AArch64, PARISC ports by Kyle McMartin
+#	sparc port by Martin Habets <errandir_news@mph.eclipse.co.uk>
+#	ppc64le port by Breno Leitao <leitao@debian.org>
 #
 #	Usage:
-#	objdump -d vmlinux | checkstack.pl [arch]
+#	objdump -d vmlinux | scripts/checkstack.pl [arch]
 #
 #	TODO :	Port to all architectures (one regex per arch)
 
+use strict;
+
 # check for arch
 #
 # $re is used for two matches:
 # $& (whole re) matches the complete objdump line with the stack growth
 # $1 (first bracket) matches the size of the stack growth
 #
+# $dre is similar, but for dynamic stack reductions:
+# $& (whole re) matches the complete objdump line with the stack growth
+# $1 (first bracket) matches the dynamic amount of the stack growth
+#
 # use anything else and feel the pain ;)
-my (@stack, $re, $x, $xs);
+my (@stack, $re, $dre, $x, $xs, $funcre);
 {
 	my $arch = shift;
 	if ($arch eq "") {
 		$arch = `uname -m`;
-		1 while chomp $arch;
+		chomp($arch);
 	}
 
 	$x	= "[0-9a-f]";	# hex character
 	$xs	= "[0-9a-f ]";	# hex character or space
-	if ($arch eq 'arm') {
+	$funcre = qr/^$x* <(.*)>:$/;
+	if ($arch eq 'aarch64') {
+		#ffffffc0006325cc:       a9bb7bfd        stp     x29, x30, [sp, #-80]!
+		#a110:       d11643ff        sub     sp, sp, #0x590
+		$re = qr/^.*stp.*sp, \#-([0-9]{1,8})\]\!/o;
+		$dre = qr/^.*sub.*sp, sp, #(0x$x{1,8})/o;
+	} elsif ($arch eq 'arm') {
 		#c0008ffc:	e24dd064	sub	sp, sp, #100	; 0x64
 		$re = qr/.*sub.*sp, sp, #(([0-9]{2}|[3-9])[0-9]{2})/o;
+	} elsif ($arch =~ /^x86(_64)?$/ || $arch =~ /^i[3456]86$/) {
+		#c0105234:       81 ec ac 05 00 00       sub    $0x5ac,%esp
+		# or
+		#    2f60:    48 81 ec e8 05 00 00       sub    $0x5e8,%rsp
+		$re = qr/^.*[as][du][db]    \$(0x$x{1,8}),\%(e|r)sp$/o;
+		$dre = qr/^.*[as][du][db]    (%.*),\%(e|r)sp$/o;
 	} elsif ($arch eq 'blackfin') {
 		#      52:       00 e8 03 00     LINK 0xc;
 		$re = qr/.*LINK (0x$x{1,5});$/o;
-	} elsif ($arch =~ /^i[3456]86$/) {
-		#c0105234:       81 ec ac 05 00 00       sub    $0x5ac,%esp
-		$re = qr/^.*[as][du][db]    \$(0x$x{1,8}),\%esp$/o;
-	} elsif ($arch eq 'x86_64') {
-		#    2f60:	48 81 ec e8 05 00 00 	sub    $0x5e8,%rsp
-		$re = qr/^.*[as][du][db]    \$(0x$x{1,8}),\%rsp$/o;
 	} elsif ($arch eq 'ia64') {
 		#e0000000044011fc:       01 0f fc 8c     adds r12=-384,r12
 		$re = qr/.*adds.*r12=-(([0-9]{2}|[3-9])[0-9]{2}),r12/o;
@@ -62,42 +79,43 @@ my (@stack, $re, $x, $xs);
 	} elsif ($arch eq 'mips') {
 		#88003254:       27bdffe0        addiu   sp,sp,-32
 		$re = qr/.*addiu.*sp,sp,-(([0-9]{2}|[3-9])[0-9]{2})/o;
-	} elsif ($arch eq 'ppc') {
-		#c00029f4:       94 21 ff 30     stwu    r1,-208(r1)
-		$re = qr/.*stwu.*r1,-($x{1,8})\(r1\)/o;
-	} elsif ($arch eq 'ppc64') {
-		#XXX
-		$re = qr/.*stdu.*r1,-($x{1,8})\(r1\)/o;
-	} elsif ($arch eq 'powerpc') {
+	} elsif ($arch eq 'nios2') {
+		#25a8:	defffb04 	addi	sp,sp,-20
+		$re = qr/.*addi.*sp,sp,-(([0-9]{2}|[3-9])[0-9]{2})/o;
+	} elsif ($arch eq 'openrisc') {
+		# c000043c:       9c 21 fe f0     l.addi r1,r1,-272
+		$re = qr/.*l\.addi.*r1,r1,-(([0-9]{2}|[3-9])[0-9]{2})/o;
+	} elsif ($arch eq 'parisc' || $arch eq 'parisc64') {
+		$re = qr/.*ldo ($x{1,8})\(sp\),sp/o;
+	} elsif ($arch eq 'powerpc' || $arch =~ /^ppc(64)?(le)?$/ ) {
+		# powerpc    : 94 21 ff 30     stwu    r1,-208(r1)
+		# ppc64(le)  : 81 ff 21 f8     stdu    r1,-128(r1)
 		$re = qr/.*st[dw]u.*r1,-($x{1,8})\(r1\)/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;
+		# or
+		#  100092:	 e3 f0 ff c8 ff 71	 lay	 %r15,-56(%r15)
+		$re = qr/.*(?:lay|ag?hi).*\%r15,-(([0-9]{2}|[3-9])[0-9]{2})
+		      (?:\(\%r15\))?$/ox;
 	} elsif ($arch =~ /^sh64$/) {
 		#XXX: we only check for the immediate case presently,
 		#     though we will want to check for the movi/sub
 		#     pair for larger users. -- PFM.
 		#a00048e0:       d4fc40f0        addi.l  r15,-240,r15
 		$re = qr/.*addi\.l.*r15,-(([0-9]{2}|[3-9])[0-9]{2}),r15/o;
+	} elsif ($arch eq 'sparc' || $arch eq 'sparc64') {
+		# f0019d10:       9d e3 bf 90     save  %sp, -112, %sp
+		$re = qr/.*save.*%sp, -(([0-9]{2}|[3-9])[0-9]{2}), %sp/o;
 	} else {
-		print("wrong or unknown architecture\n");
+		print("wrong or unknown architecture \"$arch\"\n");
 		exit
 	}
 }
 
-sub bysize($) {
-	my ($asize, $bsize);
-	($asize = $a) =~ s/.*:	*(.*)$/$1/;
-	($bsize = $b) =~ s/.*:	*(.*)$/$1/;
-	$bsize <=> $asize
-}
-
 #
 # main()
 #
-my $funcre = qr/^$x* <(.*)>:$/;
-my $func;
-my $file, $lastslash;
+my ($func, $file, $lastslash);
 
 while (my $line = <STDIN>) {
 	if ($line =~ m/$funcre/) {
@@ -137,6 +155,31 @@ while (my $line = <STDIN>) {
 		next if ($size < 100);
 		push @stack, "$intro$size\n";
 	}
+	elsif (defined $dre && $line =~ m/$dre/) {
+		my $size = "Dynamic ($1)";
+
+		next if $line !~ m/^($xs*)/;
+		my $addr = $1;
+		$addr =~ s/ /0/g;
+		$addr = "0x$addr";
+
+		#bbox: was: my $intro = "$addr $func [$file]:";
+		my $intro = "$func [$file]:";
+		my $padlen = 56 - length($intro);
+		while ($padlen > 0) {
+			$intro .= '	';
+			$padlen -= 8;
+		}
+		push @stack, "$intro$size\n";
+	}
+}
+
+sub bysize($) {
+	my ($asize, $bsize);
+	($asize = $a) =~ s/.*:  *(.*)$/$1/;
+	($bsize = $b) =~ s/.*:  *(.*)$/$1/;
+	$bsize <=> $asize
 }
 
-print sort bysize @stack;
+# Sort output by size (last field)
+print sort { ($b =~ /:\t*(\d+)$/)[0] <=> ($a =~ /:\t*(\d+)$/)[0] } @stack;