blob: 14ee68e991dd45767b8ded17747da02a59c703f1 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001#!/usr/bin/perl
2
3# Check the stack usage of functions
4#
Joern Engel2b54aae2008-02-06 01:38:02 -08005# Copyright Joern Engel <joern@lazybastard.org>
Linus Torvalds1da177e2005-04-16 15:20:36 -07006# 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>
Kyle McMartin562d1392007-10-20 13:18:56 -070016# PARISC port by Kyle McMartin <kyle@parisc-linux.org>
Martin Habetsd41e2d72008-10-21 21:58:29 -070017# sparc port by Martin Habets <errandir_news@mph.eclipse.co.uk>
Linus Torvalds1da177e2005-04-16 15:20:36 -070018#
19# Usage:
Joern Engel477116e2007-10-18 23:39:18 -070020# objdump -d vmlinux | scripts/checkstack.pl [arch]
Linus Torvalds1da177e2005-04-16 15:20:36 -070021#
22# TODO : Port to all architectures (one regex per arch)
23
24# check for arch
25#
26# $re is used for two matches:
27# $& (whole re) matches the complete objdump line with the stack growth
28# $1 (first bracket) matches the size of the stack growth
29#
Eric Sandeen585e93a2008-07-25 01:45:27 -070030# $dre is similar, but for dynamic stack redutions:
31# $& (whole re) matches the complete objdump line with the stack growth
32# $1 (first bracket) matches the dynamic amount of the stack growth
33#
Linus Torvalds1da177e2005-04-16 15:20:36 -070034# use anything else and feel the pain ;)
Eric Sandeen585e93a2008-07-25 01:45:27 -070035my (@stack, $re, $dre, $x, $xs);
Linus Torvalds1da177e2005-04-16 15:20:36 -070036{
37 my $arch = shift;
38 if ($arch eq "") {
39 $arch = `uname -m`;
Eric Sandeenabddaec2008-07-25 01:45:28 -070040 chomp($arch);
Linus Torvalds1da177e2005-04-16 15:20:36 -070041 }
42
43 $x = "[0-9a-f]"; # hex character
44 $xs = "[0-9a-f ]"; # hex character or space
45 if ($arch eq 'arm') {
46 #c0008ffc: e24dd064 sub sp, sp, #100 ; 0x64
47 $re = qr/.*sub.*sp, sp, #(([0-9]{2}|[3-9])[0-9]{2})/o;
Haavard Skinnemoen0367d892006-01-04 16:58:49 +010048 } elsif ($arch eq 'avr32') {
49 #8000008a: 20 1d sub sp,4
50 #80000ca8: fa cd 05 b0 sub sp,sp,1456
51 $re = qr/^.*sub.*sp.*,([0-9]{1,8})/o;
Linus Torvalds1da177e2005-04-16 15:20:36 -070052 } elsif ($arch =~ /^i[3456]86$/) {
53 #c0105234: 81 ec ac 05 00 00 sub $0x5ac,%esp
54 $re = qr/^.*[as][du][db] \$(0x$x{1,8}),\%esp$/o;
Eric Sandeen585e93a2008-07-25 01:45:27 -070055 $dre = qr/^.*[as][du][db] (%.*),\%esp$/o;
Linus Torvalds1da177e2005-04-16 15:20:36 -070056 } elsif ($arch eq 'x86_64') {
57 # 2f60: 48 81 ec e8 05 00 00 sub $0x5e8,%rsp
58 $re = qr/^.*[as][du][db] \$(0x$x{1,8}),\%rsp$/o;
Eric Sandeen585e93a2008-07-25 01:45:27 -070059 $dre = qr/^.*[as][du][db] (\%.*),\%rsp$/o;
Linus Torvalds1da177e2005-04-16 15:20:36 -070060 } elsif ($arch eq 'ia64') {
61 #e0000000044011fc: 01 0f fc 8c adds r12=-384,r12
62 $re = qr/.*adds.*r12=-(([0-9]{2}|[3-9])[0-9]{2}),r12/o;
63 } elsif ($arch eq 'm68k') {
64 # 2b6c: 4e56 fb70 linkw %fp,#-1168
65 # 1df770: defc ffe4 addaw #-28,%sp
66 $re = qr/.*(?:linkw %fp,|addaw )#-([0-9]{1,4})(?:,%sp)?$/o;
67 } elsif ($arch eq 'mips64') {
68 #8800402c: 67bdfff0 daddiu sp,sp,-16
69 $re = qr/.*daddiu.*sp,sp,-(([0-9]{2}|[3-9])[0-9]{2})/o;
70 } elsif ($arch eq 'mips') {
71 #88003254: 27bdffe0 addiu sp,sp,-32
72 $re = qr/.*addiu.*sp,sp,-(([0-9]{2}|[3-9])[0-9]{2})/o;
Kyle McMartin562d1392007-10-20 13:18:56 -070073 } elsif ($arch eq 'parisc' || $arch eq 'parisc64') {
74 $re = qr/.*ldo ($x{1,8})\(sp\),sp/o;
Linus Torvalds1da177e2005-04-16 15:20:36 -070075 } elsif ($arch eq 'ppc') {
76 #c00029f4: 94 21 ff 30 stwu r1,-208(r1)
77 $re = qr/.*stwu.*r1,-($x{1,8})\(r1\)/o;
78 } elsif ($arch eq 'ppc64') {
79 #XXX
80 $re = qr/.*stdu.*r1,-($x{1,8})\(r1\)/o;
Johannes Berg271c5112006-08-22 16:57:05 +020081 } elsif ($arch eq 'powerpc') {
82 $re = qr/.*st[dw]u.*r1,-($x{1,8})\(r1\)/o;
Linus Torvalds1da177e2005-04-16 15:20:36 -070083 } elsif ($arch =~ /^s390x?$/) {
84 # 11160: a7 fb ff 60 aghi %r15,-160
Christian Borntraeger89d49842008-10-10 21:33:30 +020085 # or
86 # 100092: e3 f0 ff c8 ff 71 lay %r15,-56(%r15)
87 $re = qr/.*(?:lay|ag?hi).*\%r15,-(([0-9]{2}|[3-9])[0-9]{2})
88 (?:\(\%r15\))?$/ox;
Linus Torvalds1da177e2005-04-16 15:20:36 -070089 } elsif ($arch =~ /^sh64$/) {
90 #XXX: we only check for the immediate case presently,
91 # though we will want to check for the movi/sub
92 # pair for larger users. -- PFM.
93 #a00048e0: d4fc40f0 addi.l r15,-240,r15
94 $re = qr/.*addi\.l.*r15,-(([0-9]{2}|[3-9])[0-9]{2}),r15/o;
Mike Frysinger1e9535a2007-10-16 23:27:25 -070095 } elsif ($arch =~ /^blackfin$/) {
96 # 0: 00 e8 38 01 LINK 0x4e0;
97 $re = qr/.*[[:space:]]LINK[[:space:]]*(0x$x{1,8})/o;
Martin Habetsd41e2d72008-10-21 21:58:29 -070098 } elsif ($arch eq 'sparc' || $arch eq 'sparc64') {
99 # f0019d10: 9d e3 bf 90 save %sp, -112, %sp
100 $re = qr/.*save.*%sp, -(([0-9]{2}|[3-9])[0-9]{2}), %sp/o;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101 } else {
Eric Sandeenabddaec2008-07-25 01:45:28 -0700102 print("wrong or unknown architecture \"$arch\"\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103 exit
104 }
105}
106
107sub bysize($) {
108 my ($asize, $bsize);
109 ($asize = $a) =~ s/.*: *(.*)$/$1/;
110 ($bsize = $b) =~ s/.*: *(.*)$/$1/;
111 $bsize <=> $asize
112}
113
114#
115# main()
116#
117my $funcre = qr/^$x* <(.*)>:$/;
118my $func;
Randy Dunlap8ad29142006-06-25 05:48:29 -0700119my $file, $lastslash;
120
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121while (my $line = <STDIN>) {
122 if ($line =~ m/$funcre/) {
123 $func = $1;
124 }
Randy Dunlap8ad29142006-06-25 05:48:29 -0700125 elsif ($line =~ m/(.*):\s*file format/) {
126 $file = $1;
127 $file =~ s/\.ko//;
128 $lastslash = rindex($file, "/");
129 if ($lastslash != -1) {
130 $file = substr($file, $lastslash + 1);
131 }
132 }
133 elsif ($line =~ m/$re/) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134 my $size = $1;
135 $size = hex($size) if ($size =~ /^0x/);
136
137 if ($size > 0xf0000000) {
138 $size = - $size;
139 $size += 0x80000000;
140 $size += 0x80000000;
141 }
142 next if ($size > 0x10000000);
143
144 next if $line !~ m/^($xs*)/;
145 my $addr = $1;
146 $addr =~ s/ /0/g;
147 $addr = "0x$addr";
148
Randy Dunlap8ad29142006-06-25 05:48:29 -0700149 my $intro = "$addr $func [$file]:";
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150 my $padlen = 56 - length($intro);
151 while ($padlen > 0) {
152 $intro .= ' ';
153 $padlen -= 8;
154 }
155 next if ($size < 100);
156 push @stack, "$intro$size\n";
157 }
Eric Sandeen585e93a2008-07-25 01:45:27 -0700158 elsif (defined $dre && $line =~ m/$dre/) {
159 my $size = "Dynamic ($1)";
160
161 next if $line !~ m/^($xs*)/;
162 my $addr = $1;
163 $addr =~ s/ /0/g;
164 $addr = "0x$addr";
165
166 my $intro = "$addr $func [$file]:";
167 my $padlen = 56 - length($intro);
168 while ($padlen > 0) {
169 $intro .= ' ';
170 $padlen -= 8;
171 }
172 push @stack, "$intro$size\n";
173 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174}
175
176print sort bysize @stack;