124 lines
3.5 KiB
Perl
124 lines
3.5 KiB
Perl
#!/usr/bin/perl
|
|
|
|
# Check the stack usage of functions
|
|
#
|
|
# Copyright Joern Engel <joern@wh.fh-wedel.de>
|
|
# Inspired by Linus Torvalds
|
|
# Original idea maybe from Keith Owens
|
|
# s390 port and big speedup by Arnd Bergmann <arnd@bergmann-dalldorf.de>
|
|
# Mips port by Juan Quintela <quintela@mandrakesoft.com>
|
|
# IA64 port via Andreas Dilger
|
|
# Arm port by Holger Schurig
|
|
# sh64 port by Paul Mundt
|
|
# Random bits by Matt Mackall <mpm@selenic.com>
|
|
# M68k port by Geert Uytterhoeven and Andreas Schwab
|
|
#
|
|
# Usage:
|
|
# objdump -d vmlinux | stackcheck.pl [arch]
|
|
#
|
|
# TODO : Port to all architectures (one regex per arch)
|
|
|
|
# check for arch
|
|
#
|
|
# $re is used for two matches:
|
|
# $& (whole re) matches the complete objdump line with the stack growth
|
|
# $1 (first bracket) matches the size of the stack growth
|
|
#
|
|
# use anything else and feel the pain ;)
|
|
my (@stack, $re, $x, $xs);
|
|
{
|
|
my $arch = shift;
|
|
if ($arch eq "") {
|
|
$arch = `uname -m`;
|
|
}
|
|
|
|
$x = "[0-9a-f]"; # hex character
|
|
$xs = "[0-9a-f ]"; # hex character or space
|
|
if ($arch eq 'arm') {
|
|
#c0008ffc: e24dd064 sub sp, sp, #100 ; 0x64
|
|
$re = qr/.*sub.*sp, sp, #(([0-9]{2}|[3-9])[0-9]{2})/o;
|
|
} elsif ($arch =~ /^i[3456]86$/) {
|
|
#c0105234: 81 ec ac 05 00 00 sub $0x5ac,%esp
|
|
$re = qr/^.*[as][du][db] \$(0x$x{1,8}),\%esp$/o;
|
|
} elsif ($arch eq 'x86_64') {
|
|
# 2f60: 48 81 ec e8 05 00 00 sub $0x5e8,%rsp
|
|
$re = qr/^.*[as][du][db] \$(0x$x{1,8}),\%rsp$/o;
|
|
} elsif ($arch eq 'ia64') {
|
|
#e0000000044011fc: 01 0f fc 8c adds r12=-384,r12
|
|
$re = qr/.*adds.*r12=-(([0-9]{2}|[3-9])[0-9]{2}),r12/o;
|
|
} elsif ($arch eq 'm68k') {
|
|
# 2b6c: 4e56 fb70 linkw %fp,#-1168
|
|
# 1df770: defc ffe4 addaw #-28,%sp
|
|
$re = qr/.*(?:linkw %fp,|addaw )#-([0-9]{1,4})(?:,%sp)?$/o;
|
|
} elsif ($arch eq 'mips64') {
|
|
#8800402c: 67bdfff0 daddiu sp,sp,-16
|
|
$re = qr/.*daddiu.*sp,sp,-(([0-9]{2}|[3-9])[0-9]{2})/o;
|
|
} elsif ($arch eq 'mips') {
|
|
#88003254: 27bdffe0 addiu sp,sp,-32
|
|
$re = qr/.*addiu.*sp,sp,-(([0-9]{2}|[3-9])[0-9]{2})/o;
|
|
} elsif ($arch eq 'ppc') {
|
|
#c00029f4: 94 21 ff 30 stwu r1,-208(r1)
|
|
$re = qr/.*stwu.*r1,-($x{1,8})\(r1\)/o;
|
|
} elsif ($arch eq 'ppc64') {
|
|
#XXX
|
|
$re = qr/.*stdu.*r1,-($x{1,8})\(r1\)/o;
|
|
} elsif ($arch =~ /^s390x?$/) {
|
|
# 11160: a7 fb ff 60 aghi %r15,-160
|
|
$re = qr/.*ag?hi.*\%r15,-(([0-9]{2}|[3-9])[0-9]{2})/o;
|
|
} elsif ($arch =~ /^sh64$/) {
|
|
#XXX: we only check for the immediate case presently,
|
|
# though we will want to check for the movi/sub
|
|
# pair for larger users. -- PFM.
|
|
#a00048e0: d4fc40f0 addi.l r15,-240,r15
|
|
$re = qr/.*addi\.l.*r15,-(([0-9]{2}|[3-9])[0-9]{2}),r15/o;
|
|
} else {
|
|
print("wrong or unknown architecture\n");
|
|
exit
|
|
}
|
|
}
|
|
|
|
sub bysize($) {
|
|
my ($asize, $bsize);
|
|
($asize = $a) =~ s/.*: *(.*)$/$1/;
|
|
($bsize = $b) =~ s/.*: *(.*)$/$1/;
|
|
$bsize <=> $asize
|
|
}
|
|
|
|
#
|
|
# main()
|
|
#
|
|
my $funcre = qr/^$x* <(.*)>:$/;
|
|
my $func;
|
|
while (my $line = <STDIN>) {
|
|
if ($line =~ m/$funcre/) {
|
|
$func = $1;
|
|
}
|
|
if ($line =~ m/$re/) {
|
|
my $size = $1;
|
|
$size = hex($size) if ($size =~ /^0x/);
|
|
|
|
if ($size > 0xf0000000) {
|
|
$size = - $size;
|
|
$size += 0x80000000;
|
|
$size += 0x80000000;
|
|
}
|
|
next if ($size > 0x10000000);
|
|
|
|
next if $line !~ m/^($xs*)/;
|
|
my $addr = $1;
|
|
$addr =~ s/ /0/g;
|
|
$addr = "0x$addr";
|
|
|
|
my $intro = "$addr $func:";
|
|
my $padlen = 56 - length($intro);
|
|
while ($padlen > 0) {
|
|
$intro .= ' ';
|
|
$padlen -= 8;
|
|
}
|
|
next if ($size < 100);
|
|
push @stack, "$intro$size\n";
|
|
}
|
|
}
|
|
|
|
print sort bysize @stack;
|