Char: sx, remove bogus iomap
[linux-2.6/mini2440.git] / scripts / checkstack.pl
blobf7e8e93ff30d32266c5faf4aa0688ce75b2a651e
1 #!/usr/bin/perl
3 # Check the stack usage of functions
5 # Copyright Joern Engel <joern@lazybastard.org>
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
15 # AVR32 port by Haavard Skinnemoen <hskinnemoen@atmel.com>
16 # PARISC port by Kyle McMartin <kyle@parisc-linux.org>
18 # Usage:
19 # objdump -d vmlinux | scripts/checkstack.pl [arch]
21 # TODO : Port to all architectures (one regex per arch)
23 # check for arch
25 # $re is used for two matches:
26 # $& (whole re) matches the complete objdump line with the stack growth
27 # $1 (first bracket) matches the size of the stack growth
29 # $dre is similar, but for dynamic stack redutions:
30 # $& (whole re) matches the complete objdump line with the stack growth
31 # $1 (first bracket) matches the dynamic amount of the stack growth
33 # use anything else and feel the pain ;)
34 my (@stack, $re, $dre, $x, $xs);
36 my $arch = shift;
37 if ($arch eq "") {
38 $arch = `uname -m`;
39 chomp($arch);
42 $x = "[0-9a-f]"; # hex character
43 $xs = "[0-9a-f ]"; # hex character or space
44 if ($arch eq 'arm') {
45 #c0008ffc: e24dd064 sub sp, sp, #100 ; 0x64
46 $re = qr/.*sub.*sp, sp, #(([0-9]{2}|[3-9])[0-9]{2})/o;
47 } elsif ($arch eq 'avr32') {
48 #8000008a: 20 1d sub sp,4
49 #80000ca8: fa cd 05 b0 sub sp,sp,1456
50 $re = qr/^.*sub.*sp.*,([0-9]{1,8})/o;
51 } elsif ($arch =~ /^i[3456]86$/) {
52 #c0105234: 81 ec ac 05 00 00 sub $0x5ac,%esp
53 $re = qr/^.*[as][du][db] \$(0x$x{1,8}),\%esp$/o;
54 $dre = qr/^.*[as][du][db] (%.*),\%esp$/o;
55 } elsif ($arch eq 'x86_64') {
56 # 2f60: 48 81 ec e8 05 00 00 sub $0x5e8,%rsp
57 $re = qr/^.*[as][du][db] \$(0x$x{1,8}),\%rsp$/o;
58 $dre = qr/^.*[as][du][db] (\%.*),\%rsp$/o;
59 } elsif ($arch eq 'ia64') {
60 #e0000000044011fc: 01 0f fc 8c adds r12=-384,r12
61 $re = qr/.*adds.*r12=-(([0-9]{2}|[3-9])[0-9]{2}),r12/o;
62 } elsif ($arch eq 'm68k') {
63 # 2b6c: 4e56 fb70 linkw %fp,#-1168
64 # 1df770: defc ffe4 addaw #-28,%sp
65 $re = qr/.*(?:linkw %fp,|addaw )#-([0-9]{1,4})(?:,%sp)?$/o;
66 } elsif ($arch eq 'mips64') {
67 #8800402c: 67bdfff0 daddiu sp,sp,-16
68 $re = qr/.*daddiu.*sp,sp,-(([0-9]{2}|[3-9])[0-9]{2})/o;
69 } elsif ($arch eq 'mips') {
70 #88003254: 27bdffe0 addiu sp,sp,-32
71 $re = qr/.*addiu.*sp,sp,-(([0-9]{2}|[3-9])[0-9]{2})/o;
72 } elsif ($arch eq 'parisc' || $arch eq 'parisc64') {
73 $re = qr/.*ldo ($x{1,8})\(sp\),sp/o;
74 } elsif ($arch eq 'ppc') {
75 #c00029f4: 94 21 ff 30 stwu r1,-208(r1)
76 $re = qr/.*stwu.*r1,-($x{1,8})\(r1\)/o;
77 } elsif ($arch eq 'ppc64') {
78 #XXX
79 $re = qr/.*stdu.*r1,-($x{1,8})\(r1\)/o;
80 } elsif ($arch eq 'powerpc') {
81 $re = qr/.*st[dw]u.*r1,-($x{1,8})\(r1\)/o;
82 } elsif ($arch =~ /^s390x?$/) {
83 # 11160: a7 fb ff 60 aghi %r15,-160
84 # or
85 # 100092: e3 f0 ff c8 ff 71 lay %r15,-56(%r15)
86 $re = qr/.*(?:lay|ag?hi).*\%r15,-(([0-9]{2}|[3-9])[0-9]{2})
87 (?:\(\%r15\))?$/ox;
88 } elsif ($arch =~ /^sh64$/) {
89 #XXX: we only check for the immediate case presently,
90 # though we will want to check for the movi/sub
91 # pair for larger users. -- PFM.
92 #a00048e0: d4fc40f0 addi.l r15,-240,r15
93 $re = qr/.*addi\.l.*r15,-(([0-9]{2}|[3-9])[0-9]{2}),r15/o;
94 } elsif ($arch =~ /^blackfin$/) {
95 # 0: 00 e8 38 01 LINK 0x4e0;
96 $re = qr/.*[[:space:]]LINK[[:space:]]*(0x$x{1,8})/o;
97 } else {
98 print("wrong or unknown architecture \"$arch\"\n");
99 exit
103 sub bysize($) {
104 my ($asize, $bsize);
105 ($asize = $a) =~ s/.*: *(.*)$/$1/;
106 ($bsize = $b) =~ s/.*: *(.*)$/$1/;
107 $bsize <=> $asize
111 # main()
113 my $funcre = qr/^$x* <(.*)>:$/;
114 my $func;
115 my $file, $lastslash;
117 while (my $line = <STDIN>) {
118 if ($line =~ m/$funcre/) {
119 $func = $1;
121 elsif ($line =~ m/(.*):\s*file format/) {
122 $file = $1;
123 $file =~ s/\.ko//;
124 $lastslash = rindex($file, "/");
125 if ($lastslash != -1) {
126 $file = substr($file, $lastslash + 1);
129 elsif ($line =~ m/$re/) {
130 my $size = $1;
131 $size = hex($size) if ($size =~ /^0x/);
133 if ($size > 0xf0000000) {
134 $size = - $size;
135 $size += 0x80000000;
136 $size += 0x80000000;
138 next if ($size > 0x10000000);
140 next if $line !~ m/^($xs*)/;
141 my $addr = $1;
142 $addr =~ s/ /0/g;
143 $addr = "0x$addr";
145 my $intro = "$addr $func [$file]:";
146 my $padlen = 56 - length($intro);
147 while ($padlen > 0) {
148 $intro .= ' ';
149 $padlen -= 8;
151 next if ($size < 100);
152 push @stack, "$intro$size\n";
154 elsif (defined $dre && $line =~ m/$dre/) {
155 my $size = "Dynamic ($1)";
157 next if $line !~ m/^($xs*)/;
158 my $addr = $1;
159 $addr =~ s/ /0/g;
160 $addr = "0x$addr";
162 my $intro = "$addr $func [$file]:";
163 my $padlen = 56 - length($intro);
164 while ($padlen > 0) {
165 $intro .= ' ';
166 $padlen -= 8;
168 push @stack, "$intro$size\n";
172 print sort bysize @stack;