[3320] | 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;
|
---|