# Check the stack usage of functions
#
-# Copyright Joern Engel <joern@wh.fh-wedel.de>
+# Copyright Joern Engel <joern@lazybastard.org>
# Inspired by Linus Torvalds
# Original idea maybe from Keith Owens
# s390 port and big speedup by Arnd Bergmann <arnd@bergmann-dalldorf.de>
# sh64 port by Paul Mundt
# Random bits by Matt Mackall <mpm@selenic.com>
# M68k port by Geert Uytterhoeven and Andreas Schwab
+# AVR32 port by Haavard Skinnemoen <hskinnemoen@atmel.com>
+# PARISC port by Kyle McMartin <kyle@parisc-linux.org>
#
# Usage:
-# objdump -d vmlinux | stackcheck.pl [arch]
+# objdump -d vmlinux | scripts/checkstack.pl [arch]
#
# TODO : Port to all architectures (one regex per arch)
# $& (whole re) matches the complete objdump line with the stack growth
# $1 (first bracket) matches the size of the stack growth
#
+# $dre is similar, but for dynamic stack redutions:
+# $& (whole re) matches the complete objdump line with the stack growth
+# $1 (first bracket) matches the dynamic amount of the stack growth
+#
# use anything else and feel the pain ;)
-my (@stack, $re, $x, $xs);
+my (@stack, $re, $dre, $x, $xs);
{
my $arch = shift;
if ($arch eq "") {
$arch = `uname -m`;
+ chomp($arch);
}
$x = "[0-9a-f]"; # hex character
if ($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 eq 'avr32') {
+ #8000008a: 20 1d sub sp,4
+ #80000ca8: fa cd 05 b0 sub sp,sp,1456
+ $re = qr/^.*sub.*sp.*,([0-9]{1,8})/o;
} elsif ($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;
+ $dre = qr/^.*[as][du][db] (%.*),\%esp$/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;
+ $dre = qr/^.*[as][du][db] (\%.*),\%rsp$/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 'mips') {
#88003254: 27bdffe0 addiu sp,sp,-32
$re = qr/.*addiu.*sp,sp,-(([0-9]{2}|[3-9])[0-9]{2})/o;
+ } elsif ($arch eq 'parisc' || $arch eq 'parisc64') {
+ $re = qr/.*ldo ($x{1,8})\(sp\),sp/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 eq 'powerpc') {
+ $re = qr/.*st[dw]u.*r1,-($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;
# pair for larger users. -- PFM.
#a00048e0: d4fc40f0 addi.l r15,-240,r15
$re = qr/.*addi\.l.*r15,-(([0-9]{2}|[3-9])[0-9]{2}),r15/o;
+ } elsif ($arch =~ /^blackfin$/) {
+ # 0: 00 e8 38 01 LINK 0x4e0;
+ $re = qr/.*[[:space:]]LINK[[:space:]]*(0x$x{1,8})/o;
} else {
- print("wrong or unknown architecture\n");
+ print("wrong or unknown architecture \"$arch\"\n");
exit
}
}
next if ($size < 100);
push @stack, "$intro$size\n";
}
+ elsif (defined $dre && $line =~ m/$dre/) {
+ my $size = "Dynamic ($1)";
+
+ next if $line !~ m/^($xs*)/;
+ my $addr = $1;
+ $addr =~ s/ /0/g;
+ $addr = "0x$addr";
+
+ my $intro = "$addr $func [$file]:";
+ my $padlen = 56 - length($intro);
+ while ($padlen > 0) {
+ $intro .= ' ';
+ $padlen -= 8;
+ }
+ push @stack, "$intro$size\n";
+ }
}
print sort bysize @stack;