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 | |
0367d892 | 15 | # AVR32 port by Haavard Skinnemoen <hskinnemoen@atmel.com> |
562d139c | 16 | # PARISC port by Kyle McMartin <kyle@parisc-linux.org> |
1da177e4 LT |
17 | # |
18 | # Usage: | |
477116e6 | 19 | # objdump -d vmlinux | scripts/checkstack.pl [arch] |
1da177e4 LT |
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 | # | |
585e93ae ES |
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 | |
32 | # | |
1da177e4 | 33 | # use anything else and feel the pain ;) |
585e93ae | 34 | my (@stack, $re, $dre, $x, $xs); |
1da177e4 LT |
35 | { |
36 | my $arch = shift; | |
37 | if ($arch eq "") { | |
38 | $arch = `uname -m`; | |
abddaec5 | 39 | chomp($arch); |
1da177e4 LT |
40 | } |
41 | ||
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 | $re = qr/.*sub.*sp, sp, #(([0-9]{2}|[3-9])[0-9]{2})/o; | |
0367d892 HS |
47 | } elsif ($arch eq 'avr32') { |
48 | #8000008a: 20 1d sub sp,4 | |
49 | #80000ca8: fa cd 05 b0 sub sp,sp,1456 | |
50 | $re = qr/^.*sub.*sp.*,([0-9]{1,8})/o; | |
1da177e4 LT |
51 | } elsif ($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; | |
585e93ae | 54 | $dre = qr/^.*[as][du][db] (%.*),\%esp$/o; |
1da177e4 LT |
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; | |
585e93ae | 58 | $dre = qr/^.*[as][du][db] (\%.*),\%rsp$/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; | |
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 | $re = qr/.*addiu.*sp,sp,-(([0-9]{2}|[3-9])[0-9]{2})/o; | |
562d139c KM |
72 | } elsif ($arch eq 'parisc' || $arch eq 'parisc64') { |
73 | $re = qr/.*ldo ($x{1,8})\(sp\),sp/o; | |
1da177e4 LT |
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; | |
271c511d JB |
80 | } elsif ($arch eq 'powerpc') { |
81 | $re = qr/.*st[dw]u.*r1,-($x{1,8})\(r1\)/o; | |
1da177e4 LT |
82 | } elsif ($arch =~ /^s390x?$/) { |
83 | # 11160: a7 fb ff 60 aghi %r15,-160 | |
84 | $re = qr/.*ag?hi.*\%r15,-(([0-9]{2}|[3-9])[0-9]{2})/o; | |
85 | } elsif ($arch =~ /^sh64$/) { | |
86 | #XXX: we only check for the immediate case presently, | |
87 | # though we will want to check for the movi/sub | |
88 | # pair for larger users. -- PFM. | |
89 | #a00048e0: d4fc40f0 addi.l r15,-240,r15 | |
90 | $re = qr/.*addi\.l.*r15,-(([0-9]{2}|[3-9])[0-9]{2}),r15/o; | |
1e9535a5 MF |
91 | } elsif ($arch =~ /^blackfin$/) { |
92 | # 0: 00 e8 38 01 LINK 0x4e0; | |
93 | $re = qr/.*[[:space:]]LINK[[:space:]]*(0x$x{1,8})/o; | |
1da177e4 | 94 | } else { |
abddaec5 | 95 | print("wrong or unknown architecture \"$arch\"\n"); |
1da177e4 LT |
96 | exit |
97 | } | |
98 | } | |
99 | ||
100 | sub bysize($) { | |
101 | my ($asize, $bsize); | |
102 | ($asize = $a) =~ s/.*: *(.*)$/$1/; | |
103 | ($bsize = $b) =~ s/.*: *(.*)$/$1/; | |
104 | $bsize <=> $asize | |
105 | } | |
106 | ||
107 | # | |
108 | # main() | |
109 | # | |
110 | my $funcre = qr/^$x* <(.*)>:$/; | |
111 | my $func; | |
8ad2914d RD |
112 | my $file, $lastslash; |
113 | ||
1da177e4 LT |
114 | while (my $line = <STDIN>) { |
115 | if ($line =~ m/$funcre/) { | |
116 | $func = $1; | |
117 | } | |
8ad2914d RD |
118 | elsif ($line =~ m/(.*):\s*file format/) { |
119 | $file = $1; | |
120 | $file =~ s/\.ko//; | |
121 | $lastslash = rindex($file, "/"); | |
122 | if ($lastslash != -1) { | |
123 | $file = substr($file, $lastslash + 1); | |
124 | } | |
125 | } | |
126 | elsif ($line =~ m/$re/) { | |
1da177e4 LT |
127 | my $size = $1; |
128 | $size = hex($size) if ($size =~ /^0x/); | |
129 | ||
130 | if ($size > 0xf0000000) { | |
131 | $size = - $size; | |
132 | $size += 0x80000000; | |
133 | $size += 0x80000000; | |
134 | } | |
135 | next if ($size > 0x10000000); | |
136 | ||
137 | next if $line !~ m/^($xs*)/; | |
138 | my $addr = $1; | |
139 | $addr =~ s/ /0/g; | |
140 | $addr = "0x$addr"; | |
141 | ||
8ad2914d | 142 | my $intro = "$addr $func [$file]:"; |
1da177e4 LT |
143 | my $padlen = 56 - length($intro); |
144 | while ($padlen > 0) { | |
145 | $intro .= ' '; | |
146 | $padlen -= 8; | |
147 | } | |
148 | next if ($size < 100); | |
149 | push @stack, "$intro$size\n"; | |
150 | } | |
585e93ae ES |
151 | elsif (defined $dre && $line =~ m/$dre/) { |
152 | my $size = "Dynamic ($1)"; | |
153 | ||
154 | next if $line !~ m/^($xs*)/; | |
155 | my $addr = $1; | |
156 | $addr =~ s/ /0/g; | |
157 | $addr = "0x$addr"; | |
158 | ||
159 | my $intro = "$addr $func [$file]:"; | |
160 | my $padlen = 56 - length($intro); | |
161 | while ($padlen > 0) { | |
162 | $intro .= ' '; | |
163 | $padlen -= 8; | |
164 | } | |
165 | push @stack, "$intro$size\n"; | |
166 | } | |
1da177e4 LT |
167 | } |
168 | ||
169 | print sort bysize @stack; |