string: factorize skip_spaces and export it to be generally available

[safe/jmp/linux-2.6] / scripts / checkstack.pl

diff --git a/scripts/checkstack.pl b/scripts/checkstack.pl
index c3b42f9..14ee68e 100755 (executable)
--- a/scripts/checkstack.pl
+++ b/scripts/checkstack.pl
@@ -2,7 +2,7 @@
 
 #      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>
@@ -14,9 +14,10 @@
 #      M68k port by Geert Uytterhoeven and Andreas Schwab
 #      AVR32 port by Haavard Skinnemoen <hskinnemoen@atmel.com>
 #      PARISC port by Kyle McMartin <kyle@parisc-linux.org>
+#      sparc port by Martin Habets <errandir_news@mph.eclipse.co.uk>
 #
 #      Usage:
-#      objdump -d vmlinux | stackcheck.pl [arch]
+#      objdump -d vmlinux | scripts/checkstack.pl [arch]
 #
 #      TODO :  Port to all architectures (one regex per arch)
 
@@ -26,12 +27,17 @@
 # $& (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 redutions:
+# $& (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);
 {
        my $arch = shift;
        if ($arch eq "") {
                $arch = `uname -m`;
+               chomp($arch);
        }
 
        $x      = "[0-9a-f]";   # hex character
@@ -46,9 +52,11 @@ my (@stack, $re, $x, $xs);
        } elsif ($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;
+               $dre = qr/^.*[as][du][db]    (%.*),\%esp$/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;
+               $dre = qr/^.*[as][du][db]    (\%.*),\%rsp$/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;
@@ -74,7 +82,10 @@ my (@stack, $re, $x, $xs);
                $re = qr/.*st[dw]u.*r1,-($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
@@ -84,8 +95,11 @@ my (@stack, $re, $x, $xs);
        } elsif ($arch =~ /^blackfin$/) {
                #   0:   00 e8 38 01     LINK 0x4e0;
                $re = qr/.*[[:space:]]LINK[[:space:]]*(0x$x{1,8})/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
        }
 }
@@ -141,6 +155,22 @@ 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";
+
+               my $intro = "$addr $func [$file]:";
+               my $padlen = 56 - length($intro);
+               while ($padlen > 0) {
+                       $intro .= '     ';
+                       $padlen -= 8;
+               }
+               push @stack, "$intro$size\n";
+       }
 }
 
 print sort bysize @stack;