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Commit | Line | Data |
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1da177e4 LT |
1 | #!/usr/bin/perl |
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 | |
e05503ef | 15 | # AVR32 port by Haavard Skinnemoen (Atmel) |
208ad001 | 16 | # AArch64, PARISC ports by Kyle McMartin |
d41e2d73 | 17 | # sparc port by Martin Habets <errandir_news@mph.eclipse.co.uk> |
1da177e4 LT |
18 | # |
19 | # Usage: | |
477116e6 | 20 | # objdump -d vmlinux | scripts/checkstack.pl [arch] |
1da177e4 LT |
21 | # |
22 | # TODO : Port to all architectures (one regex per arch) | |
23 | ||
1f2a144f SH |
24 | use strict; |
25 | ||
1da177e4 LT |
26 | # check for arch |
27 | # | |
28 | # $re is used for two matches: | |
29 | # $& (whole re) matches the complete objdump line with the stack growth | |
30 | # $1 (first bracket) matches the size of the stack growth | |
31 | # | |
585e93ae ES |
32 | # $dre is similar, but for dynamic stack redutions: |
33 | # $& (whole re) matches the complete objdump line with the stack growth | |
34 | # $1 (first bracket) matches the dynamic amount of the stack growth | |
35 | # | |
1da177e4 | 36 | # use anything else and feel the pain ;) |
690998b6 | 37 | my (@stack, $re, $dre, $x, $xs, $funcre); |
1da177e4 LT |
38 | { |
39 | my $arch = shift; | |
40 | if ($arch eq "") { | |
41 | $arch = `uname -m`; | |
abddaec5 | 42 | chomp($arch); |
1da177e4 LT |
43 | } |
44 | ||
45 | $x = "[0-9a-f]"; # hex character | |
46 | $xs = "[0-9a-f ]"; # hex character or space | |
690998b6 | 47 | $funcre = qr/^$x* <(.*)>:$/; |
208ad001 KM |
48 | if ($arch eq 'aarch64') { |
49 | #ffffffc0006325cc: a9bb7bfd stp x29, x30, [sp,#-80]! | |
50 | $re = qr/^.*stp.*sp,\#-([0-9]{1,8})\]\!/o; | |
51 | } elsif ($arch eq 'arm') { | |
1da177e4 LT |
52 | #c0008ffc: e24dd064 sub sp, sp, #100 ; 0x64 |
53 | $re = qr/.*sub.*sp, sp, #(([0-9]{2}|[3-9])[0-9]{2})/o; | |
0367d892 HS |
54 | } elsif ($arch eq 'avr32') { |
55 | #8000008a: 20 1d sub sp,4 | |
56 | #80000ca8: fa cd 05 b0 sub sp,sp,1456 | |
57 | $re = qr/^.*sub.*sp.*,([0-9]{1,8})/o; | |
fda9f990 | 58 | } elsif ($arch =~ /^x86(_64)?$/ || $arch =~ /^i[3456]86$/) { |
1da177e4 | 59 | #c0105234: 81 ec ac 05 00 00 sub $0x5ac,%esp |
fda9f990 KK |
60 | # or |
61 | # 2f60: 48 81 ec e8 05 00 00 sub $0x5e8,%rsp | |
62 | $re = qr/^.*[as][du][db] \$(0x$x{1,8}),\%(e|r)sp$/o; | |
63 | $dre = qr/^.*[as][du][db] (%.*),\%(e|r)sp$/o; | |
1da177e4 LT |
64 | } elsif ($arch eq 'ia64') { |
65 | #e0000000044011fc: 01 0f fc 8c adds r12=-384,r12 | |
66 | $re = qr/.*adds.*r12=-(([0-9]{2}|[3-9])[0-9]{2}),r12/o; | |
67 | } elsif ($arch eq 'm68k') { | |
68 | # 2b6c: 4e56 fb70 linkw %fp,#-1168 | |
69 | # 1df770: defc ffe4 addaw #-28,%sp | |
70 | $re = qr/.*(?:linkw %fp,|addaw )#-([0-9]{1,4})(?:,%sp)?$/o; | |
690998b6 JH |
71 | } elsif ($arch eq 'metag') { |
72 | #400026fc: 40 00 00 82 ADD A0StP,A0StP,#0x8 | |
73 | $re = qr/.*ADD.*A0StP,A0StP,\#(0x$x{1,8})/o; | |
74 | $funcre = qr/^$x* <[^\$](.*)>:$/; | |
1da177e4 LT |
75 | } elsif ($arch eq 'mips64') { |
76 | #8800402c: 67bdfff0 daddiu sp,sp,-16 | |
77 | $re = qr/.*daddiu.*sp,sp,-(([0-9]{2}|[3-9])[0-9]{2})/o; | |
78 | } elsif ($arch eq 'mips') { | |
79 | #88003254: 27bdffe0 addiu sp,sp,-32 | |
80 | $re = qr/.*addiu.*sp,sp,-(([0-9]{2}|[3-9])[0-9]{2})/o; | |
0e5a47a8 TK |
81 | } elsif ($arch eq 'nios2') { |
82 | #25a8: defffb04 addi sp,sp,-20 | |
83 | $re = qr/.*addi.*sp,sp,-(([0-9]{2}|[3-9])[0-9]{2})/o; | |
f72deab3 SH |
84 | } elsif ($arch eq 'openrisc') { |
85 | # c000043c: 9c 21 fe f0 l.addi r1,r1,-272 | |
86 | $re = qr/.*l\.addi.*r1,r1,-(([0-9]{2}|[3-9])[0-9]{2})/o; | |
562d139c KM |
87 | } elsif ($arch eq 'parisc' || $arch eq 'parisc64') { |
88 | $re = qr/.*ldo ($x{1,8})\(sp\),sp/o; | |
1da177e4 LT |
89 | } elsif ($arch eq 'ppc') { |
90 | #c00029f4: 94 21 ff 30 stwu r1,-208(r1) | |
91 | $re = qr/.*stwu.*r1,-($x{1,8})\(r1\)/o; | |
92 | } elsif ($arch eq 'ppc64') { | |
93 | #XXX | |
94 | $re = qr/.*stdu.*r1,-($x{1,8})\(r1\)/o; | |
271c511d JB |
95 | } elsif ($arch eq 'powerpc') { |
96 | $re = qr/.*st[dw]u.*r1,-($x{1,8})\(r1\)/o; | |
1da177e4 LT |
97 | } elsif ($arch =~ /^s390x?$/) { |
98 | # 11160: a7 fb ff 60 aghi %r15,-160 | |
89d49841 CB |
99 | # or |
100 | # 100092: e3 f0 ff c8 ff 71 lay %r15,-56(%r15) | |
101 | $re = qr/.*(?:lay|ag?hi).*\%r15,-(([0-9]{2}|[3-9])[0-9]{2}) | |
102 | (?:\(\%r15\))?$/ox; | |
1da177e4 LT |
103 | } elsif ($arch =~ /^sh64$/) { |
104 | #XXX: we only check for the immediate case presently, | |
105 | # though we will want to check for the movi/sub | |
106 | # pair for larger users. -- PFM. | |
107 | #a00048e0: d4fc40f0 addi.l r15,-240,r15 | |
108 | $re = qr/.*addi\.l.*r15,-(([0-9]{2}|[3-9])[0-9]{2}),r15/o; | |
1e9535a5 MF |
109 | } elsif ($arch =~ /^blackfin$/) { |
110 | # 0: 00 e8 38 01 LINK 0x4e0; | |
111 | $re = qr/.*[[:space:]]LINK[[:space:]]*(0x$x{1,8})/o; | |
d41e2d73 MH |
112 | } elsif ($arch eq 'sparc' || $arch eq 'sparc64') { |
113 | # f0019d10: 9d e3 bf 90 save %sp, -112, %sp | |
114 | $re = qr/.*save.*%sp, -(([0-9]{2}|[3-9])[0-9]{2}), %sp/o; | |
1da177e4 | 115 | } else { |
abddaec5 | 116 | print("wrong or unknown architecture \"$arch\"\n"); |
1da177e4 LT |
117 | exit |
118 | } | |
119 | } | |
120 | ||
1da177e4 LT |
121 | # |
122 | # main() | |
123 | # | |
1f2a144f | 124 | my ($func, $file, $lastslash); |
8ad2914d | 125 | |
1da177e4 LT |
126 | while (my $line = <STDIN>) { |
127 | if ($line =~ m/$funcre/) { | |
128 | $func = $1; | |
129 | } | |
8ad2914d RD |
130 | elsif ($line =~ m/(.*):\s*file format/) { |
131 | $file = $1; | |
132 | $file =~ s/\.ko//; | |
133 | $lastslash = rindex($file, "/"); | |
134 | if ($lastslash != -1) { | |
135 | $file = substr($file, $lastslash + 1); | |
136 | } | |
137 | } | |
138 | elsif ($line =~ m/$re/) { | |
1da177e4 LT |
139 | my $size = $1; |
140 | $size = hex($size) if ($size =~ /^0x/); | |
141 | ||
142 | if ($size > 0xf0000000) { | |
143 | $size = - $size; | |
144 | $size += 0x80000000; | |
145 | $size += 0x80000000; | |
146 | } | |
147 | next if ($size > 0x10000000); | |
148 | ||
149 | next if $line !~ m/^($xs*)/; | |
150 | my $addr = $1; | |
151 | $addr =~ s/ /0/g; | |
152 | $addr = "0x$addr"; | |
153 | ||
8ad2914d | 154 | my $intro = "$addr $func [$file]:"; |
1da177e4 LT |
155 | my $padlen = 56 - length($intro); |
156 | while ($padlen > 0) { | |
157 | $intro .= ' '; | |
158 | $padlen -= 8; | |
159 | } | |
160 | next if ($size < 100); | |
161 | push @stack, "$intro$size\n"; | |
162 | } | |
585e93ae ES |
163 | elsif (defined $dre && $line =~ m/$dre/) { |
164 | my $size = "Dynamic ($1)"; | |
165 | ||
166 | next if $line !~ m/^($xs*)/; | |
167 | my $addr = $1; | |
168 | $addr =~ s/ /0/g; | |
169 | $addr = "0x$addr"; | |
170 | ||
171 | my $intro = "$addr $func [$file]:"; | |
172 | my $padlen = 56 - length($intro); | |
173 | while ($padlen > 0) { | |
174 | $intro .= ' '; | |
175 | $padlen -= 8; | |
176 | } | |
177 | push @stack, "$intro$size\n"; | |
178 | } | |
1da177e4 LT |
179 | } |
180 | ||
1f2a144f SH |
181 | # Sort output by size (last field) |
182 | print sort { ($b =~ /:\t*(\d+)$/)[0] <=> ($a =~ /:\t*(\d+)$/)[0] } @stack; |