Contents of /tags/mkinitrd-6_4_0/busybox/scripts/checkstack.pl
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Fri May 27 18:20:23 2011 UTC (13 years, 4 months ago) by niro
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Fri May 27 18:20:23 2011 UTC (13 years, 4 months ago) by niro
File MIME type: text/plain
File size: 4029 byte(s)
tagged 'mkinitrd-6_4_0'
1 | #!/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; |