Annotation of /tags/mkinitrd-6_1_12/busybox/scripts/checkstack.pl
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Tue Nov 17 21:24:51 2009 UTC (14 years, 7 months ago) by niro
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Tue Nov 17 21:24:51 2009 UTC (14 years, 7 months ago) by niro
File MIME type: text/plain
File size: 4029 byte(s)
tagged 'mkinitrd-6_1_12'
1 | niro | 816 | #!/usr/bin/perl |
2 | |||
3 | # Stolen from Linux kernel :) | ||
4 | |||
5 | # Check the stack usage of functions | ||
6 | # | ||
7 | # Copyright Joern Engel <joern@wh.fh-wedel.de> | ||
8 | # Inspired by Linus Torvalds | ||
9 | # Original idea maybe from Keith Owens | ||
10 | # s390 port and big speedup by Arnd Bergmann <arnd@bergmann-dalldorf.de> | ||
11 | # Mips port by Juan Quintela <quintela@mandrakesoft.com> | ||
12 | # IA64 port via Andreas Dilger | ||
13 | # Arm port by Holger Schurig | ||
14 | # sh64 port by Paul Mundt | ||
15 | # Random bits by Matt Mackall <mpm@selenic.com> | ||
16 | # M68k port by Geert Uytterhoeven and Andreas Schwab | ||
17 | # | ||
18 | # Usage: | ||
19 | # objdump -d vmlinux | checkstack.pl [arch] | ||
20 | # | ||
21 | # TODO : Port to all architectures (one regex per arch) | ||
22 | |||
23 | # check for arch | ||
24 | # | ||
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 | ||
28 | # | ||
29 | # use anything else and feel the pain ;) | ||
30 | my (@stack, $re, $x, $xs); | ||
31 | { | ||
32 | my $arch = shift; | ||
33 | if ($arch eq "") { | ||
34 | $arch = `uname -m`; | ||
35 | } | ||
36 | |||
37 | $x = "[0-9a-f]"; # hex character | ||
38 | $xs = "[0-9a-f ]"; # hex character or space | ||
39 | if ($arch eq 'arm') { | ||
40 | #c0008ffc: e24dd064 sub sp, sp, #100 ; 0x64 | ||
41 | $re = qr/.*sub.*sp, sp, #(([0-9]{2}|[3-9])[0-9]{2})/o; | ||
42 | } elsif ($arch eq 'blackfin') { | ||
43 | # 52: 00 e8 03 00 LINK 0xc; | ||
44 | $re = qr/.*LINK (0x$x{1,5});$/o; | ||
45 | } elsif ($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; | ||
70 | } elsif ($arch eq 'powerpc') { | ||
71 | $re = qr/.*st[dw]u.*r1,-($x{1,8})\(r1\)/o; | ||
72 | } 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 | $re = qr/.*addi\.l.*r15,-(([0-9]{2}|[3-9])[0-9]{2}),r15/o; | ||
81 | } else { | ||
82 | print("wrong or unknown architecture\n"); | ||
83 | exit | ||
84 | } | ||
85 | } | ||
86 | |||
87 | sub bysize($) { | ||
88 | my ($asize, $bsize); | ||
89 | ($asize = $a) =~ s/.*: *(.*)$/$1/; | ||
90 | ($bsize = $b) =~ s/.*: *(.*)$/$1/; | ||
91 | $bsize <=> $asize | ||
92 | } | ||
93 | |||
94 | # | ||
95 | # main() | ||
96 | # | ||
97 | my $funcre = qr/^$x* <(.*)>:$/; | ||
98 | my $func; | ||
99 | my $file, $lastslash; | ||
100 | |||
101 | while (my $line = <STDIN>) { | ||
102 | if ($line =~ m/$funcre/) { | ||
103 | $func = $1; | ||
104 | } | ||
105 | elsif ($line =~ m/(.*):\s*file format/) { | ||
106 | $file = $1; | ||
107 | $file =~ s/\.ko//; | ||
108 | $lastslash = rindex($file, "/"); | ||
109 | if ($lastslash != -1) { | ||
110 | $file = substr($file, $lastslash + 1); | ||
111 | } | ||
112 | } | ||
113 | elsif ($line =~ m/$re/) { | ||
114 | my $size = $1; | ||
115 | $size = hex($size) if ($size =~ /^0x/); | ||
116 | |||
117 | if ($size > 0xf0000000) { | ||
118 | $size = - $size; | ||
119 | $size += 0x80000000; | ||
120 | $size += 0x80000000; | ||
121 | } | ||
122 | next if ($size > 0x10000000); | ||
123 | |||
124 | next if $line !~ m/^($xs*)/; | ||
125 | my $addr = $1; | ||
126 | $addr =~ s/ /0/g; | ||
127 | $addr = "0x$addr"; | ||
128 | |||
129 | # bbox: was: my $intro = "$addr $func [$file]:"; | ||
130 | my $intro = "$func [$file]:"; | ||
131 | my $padlen = 56 - length($intro); | ||
132 | while ($padlen > 0) { | ||
133 | $intro .= ' '; | ||
134 | $padlen -= 8; | ||
135 | } | ||
136 | next if ($size < 100); | ||
137 | push @stack, "$intro$size\n"; | ||
138 | } | ||
139 | } | ||
140 | |||
141 | print sort bysize @stack; |