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`; | |
39 | } | |
40 | ||
41 | $x = "[0-9a-f]"; # hex character | |
42 | $xs = "[0-9a-f ]"; # hex character or space | |
43 | if ($arch eq 'arm') { | |
44 | #c0008ffc: e24dd064 sub sp, sp, #100 ; 0x64 | |
45 | $re = qr/.*sub.*sp, sp, #(([0-9]{2}|[3-9])[0-9]{2})/o; | |
0367d892 HS |
46 | } elsif ($arch eq 'avr32') { |
47 | #8000008a: 20 1d sub sp,4 | |
48 | #80000ca8: fa cd 05 b0 sub sp,sp,1456 | |
49 | $re = qr/^.*sub.*sp.*,([0-9]{1,8})/o; | |
1da177e4 LT |
50 | } elsif ($arch =~ /^i[3456]86$/) { |
51 | #c0105234: 81 ec ac 05 00 00 sub $0x5ac,%esp | |
52 | $re = qr/^.*[as][du][db] \$(0x$x{1,8}),\%esp$/o; | |
585e93ae | 53 | $dre = qr/^.*[as][du][db] (%.*),\%esp$/o; |
1da177e4 LT |
54 | } elsif ($arch eq 'x86_64') { |
55 | # 2f60: 48 81 ec e8 05 00 00 sub $0x5e8,%rsp | |
56 | $re = qr/^.*[as][du][db] \$(0x$x{1,8}),\%rsp$/o; | |
585e93ae | 57 | $dre = qr/^.*[as][du][db] (\%.*),\%rsp$/o; |
1da177e4 LT |
58 | } elsif ($arch eq 'ia64') { |
59 | #e0000000044011fc: 01 0f fc 8c adds r12=-384,r12 | |
60 | $re = qr/.*adds.*r12=-(([0-9]{2}|[3-9])[0-9]{2}),r12/o; | |
61 | } elsif ($arch eq 'm68k') { | |
62 | # 2b6c: 4e56 fb70 linkw %fp,#-1168 | |
63 | # 1df770: defc ffe4 addaw #-28,%sp | |
64 | $re = qr/.*(?:linkw %fp,|addaw )#-([0-9]{1,4})(?:,%sp)?$/o; | |
65 | } elsif ($arch eq 'mips64') { | |
66 | #8800402c: 67bdfff0 daddiu sp,sp,-16 | |
67 | $re = qr/.*daddiu.*sp,sp,-(([0-9]{2}|[3-9])[0-9]{2})/o; | |
68 | } elsif ($arch eq 'mips') { | |
69 | #88003254: 27bdffe0 addiu sp,sp,-32 | |
70 | $re = qr/.*addiu.*sp,sp,-(([0-9]{2}|[3-9])[0-9]{2})/o; | |
562d139c KM |
71 | } elsif ($arch eq 'parisc' || $arch eq 'parisc64') { |
72 | $re = qr/.*ldo ($x{1,8})\(sp\),sp/o; | |
1da177e4 LT |
73 | } elsif ($arch eq 'ppc') { |
74 | #c00029f4: 94 21 ff 30 stwu r1,-208(r1) | |
75 | $re = qr/.*stwu.*r1,-($x{1,8})\(r1\)/o; | |
76 | } elsif ($arch eq 'ppc64') { | |
77 | #XXX | |
78 | $re = qr/.*stdu.*r1,-($x{1,8})\(r1\)/o; | |
271c511d JB |
79 | } elsif ($arch eq 'powerpc') { |
80 | $re = qr/.*st[dw]u.*r1,-($x{1,8})\(r1\)/o; | |
1da177e4 LT |
81 | } elsif ($arch =~ /^s390x?$/) { |
82 | # 11160: a7 fb ff 60 aghi %r15,-160 | |
83 | $re = qr/.*ag?hi.*\%r15,-(([0-9]{2}|[3-9])[0-9]{2})/o; | |
84 | } elsif ($arch =~ /^sh64$/) { | |
85 | #XXX: we only check for the immediate case presently, | |
86 | # though we will want to check for the movi/sub | |
87 | # pair for larger users. -- PFM. | |
88 | #a00048e0: d4fc40f0 addi.l r15,-240,r15 | |
89 | $re = qr/.*addi\.l.*r15,-(([0-9]{2}|[3-9])[0-9]{2}),r15/o; | |
1e9535a5 MF |
90 | } elsif ($arch =~ /^blackfin$/) { |
91 | # 0: 00 e8 38 01 LINK 0x4e0; | |
92 | $re = qr/.*[[:space:]]LINK[[:space:]]*(0x$x{1,8})/o; | |
1da177e4 LT |
93 | } else { |
94 | print("wrong or unknown architecture\n"); | |
95 | exit | |
96 | } | |
97 | } | |
98 | ||
99 | sub bysize($) { | |
100 | my ($asize, $bsize); | |
101 | ($asize = $a) =~ s/.*: *(.*)$/$1/; | |
102 | ($bsize = $b) =~ s/.*: *(.*)$/$1/; | |
103 | $bsize <=> $asize | |
104 | } | |
105 | ||
106 | # | |
107 | # main() | |
108 | # | |
109 | my $funcre = qr/^$x* <(.*)>:$/; | |
110 | my $func; | |
8ad2914d RD |
111 | my $file, $lastslash; |
112 | ||
1da177e4 LT |
113 | while (my $line = <STDIN>) { |
114 | if ($line =~ m/$funcre/) { | |
115 | $func = $1; | |
116 | } | |
8ad2914d RD |
117 | elsif ($line =~ m/(.*):\s*file format/) { |
118 | $file = $1; | |
119 | $file =~ s/\.ko//; | |
120 | $lastslash = rindex($file, "/"); | |
121 | if ($lastslash != -1) { | |
122 | $file = substr($file, $lastslash + 1); | |
123 | } | |
124 | } | |
125 | elsif ($line =~ m/$re/) { | |
1da177e4 LT |
126 | my $size = $1; |
127 | $size = hex($size) if ($size =~ /^0x/); | |
128 | ||
129 | if ($size > 0xf0000000) { | |
130 | $size = - $size; | |
131 | $size += 0x80000000; | |
132 | $size += 0x80000000; | |
133 | } | |
134 | next if ($size > 0x10000000); | |
135 | ||
136 | next if $line !~ m/^($xs*)/; | |
137 | my $addr = $1; | |
138 | $addr =~ s/ /0/g; | |
139 | $addr = "0x$addr"; | |
140 | ||
8ad2914d | 141 | my $intro = "$addr $func [$file]:"; |
1da177e4 LT |
142 | my $padlen = 56 - length($intro); |
143 | while ($padlen > 0) { | |
144 | $intro .= ' '; | |
145 | $padlen -= 8; | |
146 | } | |
147 | next if ($size < 100); | |
148 | push @stack, "$intro$size\n"; | |
149 | } | |
585e93ae ES |
150 | elsif (defined $dre && $line =~ m/$dre/) { |
151 | my $size = "Dynamic ($1)"; | |
152 | ||
153 | next if $line !~ m/^($xs*)/; | |
154 | my $addr = $1; | |
155 | $addr =~ s/ /0/g; | |
156 | $addr = "0x$addr"; | |
157 | ||
158 | my $intro = "$addr $func [$file]:"; | |
159 | my $padlen = 56 - length($intro); | |
160 | while ($padlen > 0) { | |
161 | $intro .= ' '; | |
162 | $padlen -= 8; | |
163 | } | |
164 | push @stack, "$intro$size\n"; | |
165 | } | |
1da177e4 LT |
166 | } |
167 | ||
168 | print sort bysize @stack; |