#!/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# 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 $re = qr/.*ag?hi.*\%r15,-(([0-9]{2}|[3-9])[0-9]{2})/o; } else { print("wrong or unknown architecture\n"); exit }} sub bysize($) { 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 > 0x80000000) { $size = - $size; $size += 0x80000000; $size += 0x80000000; } 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;
#!/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
# 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
$re = qr/.*ag?hi.*\%r15,-(([0-9]{2}|[3-9])[0-9]{2})/o;
} else {
print("wrong or unknown architecture\n");
exit
}
}
sub bysize($) {
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 > 0x80000000) {
$size = - $size;
$size += 0x80000000;
$size += 0x80000000;
}
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;