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cb77f0d6 1#!/usr/bin/env perl
1da177e4
LT
2
3# Check the stack usage of functions
4#
2b54aaef 5# Copyright Joern Engel <joern@lazybastard.org>
1da177e4
LT
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
208ad001 15# AArch64, PARISC ports by Kyle McMartin
d41e2d73 16# sparc port by Martin Habets <errandir_news@mph.eclipse.co.uk>
1da177e4
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17#
18# Usage:
477116e6 19# objdump -d vmlinux | scripts/checkstack.pl [arch]
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20#
21# TODO : Port to all architectures (one regex per arch)
22
1f2a144f
SH
23use strict;
24
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25# check for arch
26#
27# $re is used for two matches:
28# $& (whole re) matches the complete objdump line with the stack growth
29# $1 (first bracket) matches the size of the stack growth
30#
585e93ae
ES
31# $dre is similar, but for dynamic stack redutions:
32# $& (whole re) matches the complete objdump line with the stack growth
33# $1 (first bracket) matches the dynamic amount of the stack growth
34#
1da177e4 35# use anything else and feel the pain ;)
690998b6 36my (@stack, $re, $dre, $x, $xs, $funcre);
1da177e4
LT
37{
38 my $arch = shift;
39 if ($arch eq "") {
40 $arch = `uname -m`;
abddaec5 41 chomp($arch);
1da177e4
LT
42 }
43
44 $x = "[0-9a-f]"; # hex character
45 $xs = "[0-9a-f ]"; # hex character or space
690998b6 46 $funcre = qr/^$x* <(.*)>:$/;
208ad001
KM
47 if ($arch eq 'aarch64') {
48 #ffffffc0006325cc: a9bb7bfd stp x29, x30, [sp,#-80]!
49 $re = qr/^.*stp.*sp,\#-([0-9]{1,8})\]\!/o;
50 } elsif ($arch eq 'arm') {
1da177e4
LT
51 #c0008ffc: e24dd064 sub sp, sp, #100 ; 0x64
52 $re = qr/.*sub.*sp, sp, #(([0-9]{2}|[3-9])[0-9]{2})/o;
fda9f990 53 } elsif ($arch =~ /^x86(_64)?$/ || $arch =~ /^i[3456]86$/) {
1da177e4 54 #c0105234: 81 ec ac 05 00 00 sub $0x5ac,%esp
fda9f990
KK
55 # or
56 # 2f60: 48 81 ec e8 05 00 00 sub $0x5e8,%rsp
57 $re = qr/^.*[as][du][db] \$(0x$x{1,8}),\%(e|r)sp$/o;
58 $dre = qr/^.*[as][du][db] (%.*),\%(e|r)sp$/o;
1da177e4
LT
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;
690998b6
JH
66 } elsif ($arch eq 'metag') {
67 #400026fc: 40 00 00 82 ADD A0StP,A0StP,#0x8
68 $re = qr/.*ADD.*A0StP,A0StP,\#(0x$x{1,8})/o;
69 $funcre = qr/^$x* <[^\$](.*)>:$/;
1da177e4
LT
70 } elsif ($arch eq 'mips64') {
71 #8800402c: 67bdfff0 daddiu sp,sp,-16
72 $re = qr/.*daddiu.*sp,sp,-(([0-9]{2}|[3-9])[0-9]{2})/o;
73 } elsif ($arch eq 'mips') {
74 #88003254: 27bdffe0 addiu sp,sp,-32
75 $re = qr/.*addiu.*sp,sp,-(([0-9]{2}|[3-9])[0-9]{2})/o;
0e5a47a8
TK
76 } elsif ($arch eq 'nios2') {
77 #25a8: defffb04 addi sp,sp,-20
78 $re = qr/.*addi.*sp,sp,-(([0-9]{2}|[3-9])[0-9]{2})/o;
f72deab3
SH
79 } elsif ($arch eq 'openrisc') {
80 # c000043c: 9c 21 fe f0 l.addi r1,r1,-272
81 $re = qr/.*l\.addi.*r1,r1,-(([0-9]{2}|[3-9])[0-9]{2})/o;
562d139c
KM
82 } elsif ($arch eq 'parisc' || $arch eq 'parisc64') {
83 $re = qr/.*ldo ($x{1,8})\(sp\),sp/o;
1da177e4
LT
84 } elsif ($arch eq 'ppc') {
85 #c00029f4: 94 21 ff 30 stwu r1,-208(r1)
86 $re = qr/.*stwu.*r1,-($x{1,8})\(r1\)/o;
87 } elsif ($arch eq 'ppc64') {
88 #XXX
89 $re = qr/.*stdu.*r1,-($x{1,8})\(r1\)/o;
271c511d
JB
90 } elsif ($arch eq 'powerpc') {
91 $re = qr/.*st[dw]u.*r1,-($x{1,8})\(r1\)/o;
1da177e4
LT
92 } elsif ($arch =~ /^s390x?$/) {
93 # 11160: a7 fb ff 60 aghi %r15,-160
89d49841
CB
94 # or
95 # 100092: e3 f0 ff c8 ff 71 lay %r15,-56(%r15)
96 $re = qr/.*(?:lay|ag?hi).*\%r15,-(([0-9]{2}|[3-9])[0-9]{2})
97 (?:\(\%r15\))?$/ox;
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LT
98 } elsif ($arch =~ /^sh64$/) {
99 #XXX: we only check for the immediate case presently,
100 # though we will want to check for the movi/sub
101 # pair for larger users. -- PFM.
102 #a00048e0: d4fc40f0 addi.l r15,-240,r15
103 $re = qr/.*addi\.l.*r15,-(([0-9]{2}|[3-9])[0-9]{2}),r15/o;
1e9535a5
MF
104 } elsif ($arch =~ /^blackfin$/) {
105 # 0: 00 e8 38 01 LINK 0x4e0;
106 $re = qr/.*[[:space:]]LINK[[:space:]]*(0x$x{1,8})/o;
d41e2d73
MH
107 } elsif ($arch eq 'sparc' || $arch eq 'sparc64') {
108 # f0019d10: 9d e3 bf 90 save %sp, -112, %sp
109 $re = qr/.*save.*%sp, -(([0-9]{2}|[3-9])[0-9]{2}), %sp/o;
1da177e4 110 } else {
abddaec5 111 print("wrong or unknown architecture \"$arch\"\n");
1da177e4
LT
112 exit
113 }
114}
115
1da177e4
LT
116#
117# main()
118#
1f2a144f 119my ($func, $file, $lastslash);
8ad2914d 120
1da177e4
LT
121while (my $line = <STDIN>) {
122 if ($line =~ m/$funcre/) {
123 $func = $1;
124 }
8ad2914d
RD
125 elsif ($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/) {
1da177e4
LT
134 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
8ad2914d 149 my $intro = "$addr $func [$file]:";
1da177e4
LT
150 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 }
585e93ae
ES
158 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$size\n";
173 }
1da177e4
LT
174}
175
1f2a144f
SH
176# Sort output by size (last field)
177print sort { ($b =~ /:\t*(\d+)$/)[0] <=> ($a =~ /:\t*(\d+)$/)[0] } @stack;