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Linus Torvalds1da177e2005-04-16 15:20:36 -07001#!/usr/bin/perl
2
3# Check the stack usage of functions
4#
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# sh64 port by Paul Mundt
13# Random bits by Matt Mackall <mpm@selenic.com>
14# M68k port by Geert Uytterhoeven and Andreas Schwab
Haavard Skinnemoen0367d892006-01-04 16:58:49 +010015# AVR32 port by Haavard Skinnemoen <hskinnemoen@atmel.com>
Linus Torvalds1da177e2005-04-16 15:20:36 -070016#
17# Usage:
18# objdump -d vmlinux | stackcheck.pl [arch]
19#
20# TODO : Port to all architectures (one regex per arch)
21
22# check for arch
23#
24# $re is used for two matches:
25# $& (whole re) matches the complete objdump line with the stack growth
26# $1 (first bracket) matches the size of the stack growth
27#
28# use anything else and feel the pain ;)
29my (@stack, $re, $x, $xs);
30{
31 my $arch = shift;
32 if ($arch eq "") {
33 $arch = `uname -m`;
34 }
35
36 $x = "[0-9a-f]"; # hex character
37 $xs = "[0-9a-f ]"; # hex character or space
38 if ($arch eq 'arm') {
39 #c0008ffc: e24dd064 sub sp, sp, #100 ; 0x64
40 $re = qr/.*sub.*sp, sp, #(([0-9]{2}|[3-9])[0-9]{2})/o;
Haavard Skinnemoen0367d892006-01-04 16:58:49 +010041 } elsif ($arch eq 'avr32') {
42 #8000008a: 20 1d sub sp,4
43 #80000ca8: fa cd 05 b0 sub sp,sp,1456
44 $re = qr/^.*sub.*sp.*,([0-9]{1,8})/o;
Linus Torvalds1da177e2005-04-16 15:20:36 -070045 } elsif ($arch =~ /^i[3456]86$/) {
46 #c0105234: 81 ec ac 05 00 00 sub $0x5ac,%esp
47 $re = qr/^.*[as][du][db] \$(0x$x{1,8}),\%esp$/o;
48 } elsif ($arch eq 'x86_64') {
49 # 2f60: 48 81 ec e8 05 00 00 sub $0x5e8,%rsp
50 $re = qr/^.*[as][du][db] \$(0x$x{1,8}),\%rsp$/o;
51 } elsif ($arch eq 'ia64') {
52 #e0000000044011fc: 01 0f fc 8c adds r12=-384,r12
53 $re = qr/.*adds.*r12=-(([0-9]{2}|[3-9])[0-9]{2}),r12/o;
54 } elsif ($arch eq 'm68k') {
55 # 2b6c: 4e56 fb70 linkw %fp,#-1168
56 # 1df770: defc ffe4 addaw #-28,%sp
57 $re = qr/.*(?:linkw %fp,|addaw )#-([0-9]{1,4})(?:,%sp)?$/o;
58 } elsif ($arch eq 'mips64') {
59 #8800402c: 67bdfff0 daddiu sp,sp,-16
60 $re = qr/.*daddiu.*sp,sp,-(([0-9]{2}|[3-9])[0-9]{2})/o;
61 } elsif ($arch eq 'mips') {
62 #88003254: 27bdffe0 addiu sp,sp,-32
63 $re = qr/.*addiu.*sp,sp,-(([0-9]{2}|[3-9])[0-9]{2})/o;
64 } elsif ($arch eq 'ppc') {
65 #c00029f4: 94 21 ff 30 stwu r1,-208(r1)
66 $re = qr/.*stwu.*r1,-($x{1,8})\(r1\)/o;
67 } elsif ($arch eq 'ppc64') {
68 #XXX
69 $re = qr/.*stdu.*r1,-($x{1,8})\(r1\)/o;
Johannes Berg271c5112006-08-22 16:57:05 +020070 } elsif ($arch eq 'powerpc') {
71 $re = qr/.*st[dw]u.*r1,-($x{1,8})\(r1\)/o;
Linus Torvalds1da177e2005-04-16 15:20:36 -070072 } elsif ($arch =~ /^s390x?$/) {
73 # 11160: a7 fb ff 60 aghi %r15,-160
74 $re = qr/.*ag?hi.*\%r15,-(([0-9]{2}|[3-9])[0-9]{2})/o;
75 } elsif ($arch =~ /^sh64$/) {
76 #XXX: we only check for the immediate case presently,
77 # though we will want to check for the movi/sub
78 # pair for larger users. -- PFM.
79 #a00048e0: d4fc40f0 addi.l r15,-240,r15
80 $re = qr/.*addi\.l.*r15,-(([0-9]{2}|[3-9])[0-9]{2}),r15/o;
Mike Frysinger1e9535a2007-10-16 23:27:25 -070081 } elsif ($arch =~ /^blackfin$/) {
82 # 0: 00 e8 38 01 LINK 0x4e0;
83 $re = qr/.*[[:space:]]LINK[[:space:]]*(0x$x{1,8})/o;
Linus Torvalds1da177e2005-04-16 15:20:36 -070084 } else {
85 print("wrong or unknown architecture\n");
86 exit
87 }
88}
89
90sub bysize($) {
91 my ($asize, $bsize);
92 ($asize = $a) =~ s/.*: *(.*)$/$1/;
93 ($bsize = $b) =~ s/.*: *(.*)$/$1/;
94 $bsize <=> $asize
95}
96
97#
98# main()
99#
100my $funcre = qr/^$x* <(.*)>:$/;
101my $func;
Randy Dunlap8ad29142006-06-25 05:48:29 -0700102my $file, $lastslash;
103
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104while (my $line = <STDIN>) {
105 if ($line =~ m/$funcre/) {
106 $func = $1;
107 }
Randy Dunlap8ad29142006-06-25 05:48:29 -0700108 elsif ($line =~ m/(.*):\s*file format/) {
109 $file = $1;
110 $file =~ s/\.ko//;
111 $lastslash = rindex($file, "/");
112 if ($lastslash != -1) {
113 $file = substr($file, $lastslash + 1);
114 }
115 }
116 elsif ($line =~ m/$re/) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700117 my $size = $1;
118 $size = hex($size) if ($size =~ /^0x/);
119
120 if ($size > 0xf0000000) {
121 $size = - $size;
122 $size += 0x80000000;
123 $size += 0x80000000;
124 }
125 next if ($size > 0x10000000);
126
127 next if $line !~ m/^($xs*)/;
128 my $addr = $1;
129 $addr =~ s/ /0/g;
130 $addr = "0x$addr";
131
Randy Dunlap8ad29142006-06-25 05:48:29 -0700132 my $intro = "$addr $func [$file]:";
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133 my $padlen = 56 - length($intro);
134 while ($padlen > 0) {
135 $intro .= ' ';
136 $padlen -= 8;
137 }
138 next if ($size < 100);
139 push @stack, "$intro$size\n";
140 }
141}
142
143print sort bysize @stack;