3 # Check the stack usage of functions
5 # Copyright Joern Engel <joern@wh.fh-wedel.de>
6 # Inspired by Linus Torvalds
7 # Original idea maybe from Keith Owens
8 # s390 port and big speedup by Arnd Bergmann <arnd@bergmann-dalldorf.de>
9 # Mips port by Juan Quintela <quintela@mandrakesoft.com>
10 # IA64 port via Andreas Dilger
11 # Arm port by Holger Schurig
12 # Random bits by Matt Mackall <mpm@selenic.com>
13 # M68k port by Geert Uytterhoeven and Andreas Schwab
16 # objdump -d vmlinux | stackcheck.pl [arch]
18 # TODO : Port to all architectures (one regex per arch)
22 # $re is used for two matches:
23 # $& (whole re) matches the complete objdump line with the stack growth
24 # $1 (first bracket) matches the size of the stack growth
26 # use anything else and feel the pain ;)
27 my (@stack, $re, $x, $xs);
34 $x = "[0-9a-f]"; # hex character
35 $xs = "[0-9a-f ]"; # hex character or space
37 #c0008ffc: e24dd064 sub sp, sp, #100 ; 0x64
38 $re = qr/.*sub.*sp, sp, #(([0-9]{2}|[3-9])[0-9]{2})/o;
39 } elsif ($arch =~ /^i[3456]86$/) {
40 #c0105234: 81 ec ac 05 00 00 sub $0x5ac,%esp
41 $re = qr/^.*[as][du][db] \$(0x$x{1,8}),\%esp$/o;
42 } elsif ($arch eq 'x86_64') {
43 # 2f60: 48 81 ec e8 05 00 00 sub $0x5e8,%rsp
44 $re = qr/^.*[as][du][db] \$(0x$x{1,8}),\%rsp$/o;
45 } elsif ($arch eq 'ia64') {
46 #e0000000044011fc: 01 0f fc 8c adds r12=-384,r12
47 $re = qr/.*adds.*r12=-(([0-9]{2}|[3-9])[0-9]{2}),r12/o;
48 } elsif ($arch eq 'm68k') {
49 # 2b6c: 4e56 fb70 linkw %fp,#-1168
50 # 1df770: defc ffe4 addaw #-28,%sp
51 $re = qr/.*(?:linkw %fp,|addaw )#-([0-9]{1,4})(?:,%sp)?$/o;
52 } elsif ($arch eq 'mips64') {
53 #8800402c: 67bdfff0 daddiu sp,sp,-16
54 $re = qr/.*daddiu.*sp,sp,-(([0-9]{2}|[3-9])[0-9]{2})/o;
55 } elsif ($arch eq 'mips') {
56 #88003254: 27bdffe0 addiu sp,sp,-32
57 $re = qr/.*addiu.*sp,sp,-(([0-9]{2}|[3-9])[0-9]{2})/o;
58 } elsif ($arch eq 'ppc') {
59 #c00029f4: 94 21 ff 30 stwu r1,-208(r1)
60 $re = qr/.*stwu.*r1,-($x{1,8})\(r1\)/o;
61 } elsif ($arch eq 'ppc64') {
63 $re = qr/.*stdu.*r1,-($x{1,8})\(r1\)/o;
64 } elsif ($arch =~ /^s390x?$/) {
65 # 11160: a7 fb ff 60 aghi %r15,-160
66 $re = qr/.*ag?hi.*\%r15,-(([0-9]{2}|[3-9])[0-9]{2})/o;
68 print("wrong or unknown architecture\n");
75 ($asize = $a) =~ s/.* +(.*)$/$1/;
76 ($bsize = $b) =~ s/.* +(.*)$/$1/;
83 my $funcre = qr/^$x* <(.*)>:$/;
85 while (my $line = <STDIN>) {
86 if ($line =~ m/$funcre/) {
89 if ($line =~ m/$re/) {
91 $size = hex($size) if ($size =~ /^0x/);
93 if ($size > 0x80000000) {
99 next if $line !~ m/^($xs*)/;
104 my $intro = "$addr $func:";
105 my $padlen = 56 - length($intro);
106 while ($padlen > 0) {
110 next if ($size < 100);
111 push @stack, "$intro$size\n";
115 print sort bysize @stack;