| #!/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> |
| # |
| # Usage: |
| # objdump -d vmlinux | stackcheck_ppc.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 $arch = shift; |
| if ($arch eq "") { |
| $arch = `uname -m`; |
| } |
| |
| $x = "[0-9a-f]"; # hex character |
| $xs = "[0-9a-f ]"; # hex character or space |
| if ($arch =~ /^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 =~ /^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 =~ /^mips64$/) { |
| #8800402c: 67bdfff0 daddiu sp,sp,-16 |
| $re = qr/.*daddiu.*sp,sp,-(([0-9]{2}|[3-9])[0-9]{2})/o; |
| } elsif ($arch =~ /^mips$/) { |
| #88003254: 27bdffe0 addiu sp,sp,-32 |
| $re = qr/.*addiu.*sp,sp,-(([0-9]{2}|[3-9])[0-9]{2})/o; |
| } elsif ($arch =~ /^ppc$/) { |
| #c00029f4: 94 21 ff 30 stwu r1,-208(r1) |
| $re = qr/.*stwu.*r1,-($x{1,8})\(r1\)/o; |
| } elsif ($arch =~ /^ppc64$/) { |
| #XXX |
| $re = qr/.*stdu.*r1,-($x{1,8})\(r1\)/o; |
| } elsif ($arch =~ /^s390x?$/) { |
| # 11160: a7 fb ff 60 aghi %r15,-160 |
| $re = qr/.*ag?hi.*\%r15,-(([0-9]{2}|[3-9])[0-9]{2})/o; |
| } else { |
| print("wrong or unknown architecture\n"); |
| exit |
| } |
| } |
| |
| sub bysize($) { |
| ($asize = $a) =~ s/.* +(.*)$/$1/; |
| ($bsize = $b) =~ s/.* +(.*)$/$1/; |
| $bsize <=> $asize |
| } |
| |
| # |
| # main() |
| # |
| $funcre = qr/^$x* \<(.*)\>:$/; |
| while ($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; |
| } |
| |
| $line =~ m/^($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); |
| $stack[@stack] = "$intro$size\n"; |
| } |
| } |
| |
| @sortedstack = sort bysize @stack; |
| |
| foreach $i (@sortedstack) { |
| print("$i"); |
| } |