3 # Check the stack usage of functions
5 # Copyright Joern Engel <joern@lazybastard.org>
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
15 # AVR32 port by Haavard Skinnemoen (Atmel)
16 # PARISC port by Kyle McMartin <kyle@parisc-linux.org>
17 # sparc port by Martin Habets <errandir_news@mph.eclipse.co.uk>
20 # objdump -d vmlinux | scripts/checkstack.pl [arch]
22 # TODO : Port to all architectures (one regex per arch)
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
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
36 # use anything else and feel the pain ;)
37 my (@stack, $re, $dre, $x, $xs, $funcre);
45 $x = "[0-9a-f]"; # hex character
46 $xs = "[0-9a-f ]"; # hex character or space
47 $funcre = qr/^$x* <(.*)>:$/;
49 #c0008ffc: e24dd064 sub sp, sp, #100 ; 0x64
50 $re = qr/.*sub.*sp, sp, #(([0-9]{2}|[3-9])[0-9]{2})/o;
51 } elsif ($arch eq 'avr32') {
52 #8000008a: 20 1d sub sp,4
53 #80000ca8: fa cd 05 b0 sub sp,sp,1456
54 $re = qr/^.*sub.*sp.*,([0-9]{1,8})/o;
55 } elsif ($arch =~ /^i[3456]86$/) {
56 #c0105234: 81 ec ac 05 00 00 sub $0x5ac,%esp
57 $re = qr/^.*[as][du][db] \$(0x$x{1,8}),\%esp$/o;
58 $dre = qr/^.*[as][du][db] (%.*),\%esp$/o;
59 } elsif ($arch eq 'x86_64') {
60 # 2f60: 48 81 ec e8 05 00 00 sub $0x5e8,%rsp
61 $re = qr/^.*[as][du][db] \$(0x$x{1,8}),\%rsp$/o;
62 $dre = qr/^.*[as][du][db] (\%.*),\%rsp$/o;
63 } elsif ($arch eq 'ia64') {
64 #e0000000044011fc: 01 0f fc 8c adds r12=-384,r12
65 $re = qr/.*adds.*r12=-(([0-9]{2}|[3-9])[0-9]{2}),r12/o;
66 } elsif ($arch eq 'm68k') {
67 # 2b6c: 4e56 fb70 linkw %fp,#-1168
68 # 1df770: defc ffe4 addaw #-28,%sp
69 $re = qr/.*(?:linkw %fp,|addaw )#-([0-9]{1,4})(?:,%sp)?$/o;
70 } elsif ($arch eq 'metag') {
71 #400026fc: 40 00 00 82 ADD A0StP,A0StP,#0x8
72 $re = qr/.*ADD.*A0StP,A0StP,\#(0x$x{1,8})/o;
73 $funcre = qr/^$x* <[^\$](.*)>:$/;
74 } elsif ($arch eq 'mips64') {
75 #8800402c: 67bdfff0 daddiu sp,sp,-16
76 $re = qr/.*daddiu.*sp,sp,-(([0-9]{2}|[3-9])[0-9]{2})/o;
77 } elsif ($arch eq 'mips') {
78 #88003254: 27bdffe0 addiu sp,sp,-32
79 $re = qr/.*addiu.*sp,sp,-(([0-9]{2}|[3-9])[0-9]{2})/o;
80 } elsif ($arch eq 'parisc' || $arch eq 'parisc64') {
81 $re = qr/.*ldo ($x{1,8})\(sp\),sp/o;
82 } elsif ($arch eq 'ppc') {
83 #c00029f4: 94 21 ff 30 stwu r1,-208(r1)
84 $re = qr/.*stwu.*r1,-($x{1,8})\(r1\)/o;
85 } elsif ($arch eq 'ppc64') {
87 $re = qr/.*stdu.*r1,-($x{1,8})\(r1\)/o;
88 } elsif ($arch eq 'powerpc') {
89 $re = qr/.*st[dw]u.*r1,-($x{1,8})\(r1\)/o;
90 } elsif ($arch =~ /^s390x?$/) {
91 # 11160: a7 fb ff 60 aghi %r15,-160
93 # 100092: e3 f0 ff c8 ff 71 lay %r15,-56(%r15)
94 $re = qr/.*(?:lay|ag?hi).*\%r15,-(([0-9]{2}|[3-9])[0-9]{2})
96 } elsif ($arch =~ /^sh64$/) {
97 #XXX: we only check for the immediate case presently,
98 # though we will want to check for the movi/sub
99 # pair for larger users. -- PFM.
100 #a00048e0: d4fc40f0 addi.l r15,-240,r15
101 $re = qr/.*addi\.l.*r15,-(([0-9]{2}|[3-9])[0-9]{2}),r15/o;
102 } elsif ($arch =~ /^blackfin$/) {
103 # 0: 00 e8 38 01 LINK 0x4e0;
104 $re = qr/.*[[:space:]]LINK[[:space:]]*(0x$x{1,8})/o;
105 } elsif ($arch eq 'sparc' || $arch eq 'sparc64') {
106 # f0019d10: 9d e3 bf 90 save %sp, -112, %sp
107 $re = qr/.*save.*%sp, -(([0-9]{2}|[3-9])[0-9]{2}), %sp/o;
109 print("wrong or unknown architecture \"$arch\"\n");
117 my ($func, $file, $lastslash);
119 while (my $line = <STDIN>) {
120 if ($line =~ m/$funcre/) {
123 elsif ($line =~ m/(.*):\s*file format/) {
126 $lastslash = rindex($file, "/");
127 if ($lastslash != -1) {
128 $file = substr($file, $lastslash + 1);
131 elsif ($line =~ m/$re/) {
133 $size = hex($size) if ($size =~ /^0x/);
135 if ($size > 0xf0000000) {
140 next if ($size > 0x10000000);
142 next if $line !~ m/^($xs*)/;
147 my $intro = "$addr $func [$file]:";
148 my $padlen = 56 - length($intro);
149 while ($padlen > 0) {
153 next if ($size < 100);
154 push @stack, "$intro$size\n";
156 elsif (defined $dre && $line =~ m/$dre/) {
157 my $size = "Dynamic ($1)";
159 next if $line !~ m/^($xs*)/;
164 my $intro = "$addr $func [$file]:";
165 my $padlen = 56 - length($intro);
166 while ($padlen > 0) {
170 push @stack, "$intro$size\n";
174 # Sort output by size (last field)
175 print sort { ($b =~ /:\t*(\d+)$/)[0] <=> ($a =~ /:\t*(\d+)$/)[0] } @stack;