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 <hskinnemoen@atmel.com>
16 # PARISC port by Kyle McMartin <kyle@parisc-linux.org>
19 # objdump -d vmlinux | scripts/checkstack.pl [arch]
21 # TODO : Port to all architectures (one regex per arch)
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
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
33 # use anything else and feel the pain ;)
34 my (@stack, $re, $dre, $x, $xs);
42 $x = "[0-9a-f]"; # hex character
43 $xs = "[0-9a-f ]"; # hex character or space
45 #c0008ffc: e24dd064 sub sp, sp, #100 ; 0x64
46 $re = qr/.*sub.*sp, sp, #(([0-9]{2}|[3-9])[0-9]{2})/o;
47 } elsif ($arch eq 'avr32') {
48 #8000008a: 20 1d sub sp,4
49 #80000ca8: fa cd 05 b0 sub sp,sp,1456
50 $re = qr/^.*sub.*sp.*,([0-9]{1,8})/o;
51 } elsif ($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;
54 $dre = qr/^.*[as][du][db] (%.*),\%esp$/o;
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;
58 $dre = qr/^.*[as][du][db] (\%.*),\%rsp$/o;
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 $re = qr/.*addiu.*sp,sp,-(([0-9]{2}|[3-9])[0-9]{2})/o;
72 } elsif ($arch eq 'parisc' || $arch eq 'parisc64') {
73 $re = qr/.*ldo ($x{1,8})\(sp\),sp/o;
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') {
79 $re = qr/.*stdu.*r1,-($x{1,8})\(r1\)/o;
80 } elsif ($arch eq 'powerpc') {
81 $re = qr/.*st[dw]u.*r1,-($x{1,8})\(r1\)/o;
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 $re = qr/.*addi\.l.*r15,-(([0-9]{2}|[3-9])[0-9]{2}),r15/o;
91 } elsif ($arch =~ /^blackfin$/) {
92 # 0: 00 e8 38 01 LINK 0x4e0;
93 $re = qr/.*[[:space:]]LINK[[:space:]]*(0x$x{1,8})/o;
95 print("wrong or unknown architecture \"$arch\"\n");
102 ($asize = $a) =~ s/.*: *(.*)$/$1/;
103 ($bsize = $b) =~ s/.*: *(.*)$/$1/;
110 my $funcre = qr/^$x* <(.*)>:$/;
112 my $file, $lastslash;
114 while (my $line = <STDIN
>) {
115 if ($line =~ m/$funcre/) {
118 elsif ($line =~ m/(.*):\s*file format/) {
121 $lastslash = rindex($file, "/");
122 if ($lastslash != -1) {
123 $file = substr($file, $lastslash + 1);
126 elsif ($line =~ m/$re/) {
128 $size = hex($size) if ($size =~ /^0x/);
130 if ($size > 0xf0000000) {
135 next if ($size > 0x10000000);
137 next if $line !~ m/^($xs*)/;
142 my $intro = "$addr $func [$file]:";
143 my $padlen = 56 - length($intro);
144 while ($padlen > 0) {
148 next if ($size < 100);
149 push @stack, "$intro$size\n";
151 elsif (defined $dre && $line =~ m/$dre/) {
152 my $size = "Dynamic ($1)";
154 next if $line !~ m/^($xs*)/;
159 my $intro = "$addr $func [$file]:";
160 my $padlen = 56 - length($intro);
161 while ($padlen > 0) {
165 push @stack, "$intro$size\n";
169 print sort bysize
@stack;