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scripts/checkstack.pl
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#!/usr/bin/perl # Check the stack usage of functions # |
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# Copyright Joern Engel <joern@lazybastard.org> |
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# 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 |
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# AVR32 port by Haavard Skinnemoen <hskinnemoen@atmel.com> |
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# PARISC port by Kyle McMartin <kyle@parisc-linux.org> |
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# sparc port by Martin Habets <errandir_news@mph.eclipse.co.uk> |
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# # Usage: |
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# objdump -d vmlinux | scripts/checkstack.pl [arch] |
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# # TODO : Port to all architectures (one regex per arch) |
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use strict; |
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# 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 # |
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# $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 # |
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# use anything else and feel the pain ;) |
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my (@stack, $re, $dre, $x, $xs); |
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{ my $arch = shift; if ($arch eq "") { $arch = `uname -m`; |
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chomp($arch); |
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} $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 $re = qr/.*sub.*sp, sp, #(([0-9]{2}|[3-9])[0-9]{2})/o; |
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} elsif ($arch eq 'avr32') { #8000008a: 20 1d sub sp,4 #80000ca8: fa cd 05 b0 sub sp,sp,1456 $re = qr/^.*sub.*sp.*,([0-9]{1,8})/o; |
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} elsif ($arch =~ /^i[3456]86$/) { #c0105234: 81 ec ac 05 00 00 sub $0x5ac,%esp $re = qr/^.*[as][du][db] \$(0x$x{1,8}),\%esp$/o; |
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$dre = qr/^.*[as][du][db] (%.*),\%esp$/o; |
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} elsif ($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$/o; |
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$dre = qr/^.*[as][du][db] (\%.*),\%rsp$/o; |
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} elsif ($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 $re = qr/.*addiu.*sp,sp,-(([0-9]{2}|[3-9])[0-9]{2})/o; |
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} elsif ($arch eq 'parisc' || $arch eq 'parisc64') { $re = qr/.*ldo ($x{1,8})\(sp\),sp/o; |
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} 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; |
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} elsif ($arch eq 'powerpc') { $re = qr/.*st[dw]u.*r1,-($x{1,8})\(r1\)/o; |
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} elsif ($arch =~ /^s390x?$/) { # 11160: a7 fb ff 60 aghi %r15,-160 |
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# or # 100092: e3 f0 ff c8 ff 71 lay %r15,-56(%r15) $re = qr/.*(?:lay|ag?hi).*\%r15,-(([0-9]{2}|[3-9])[0-9]{2}) (?:\(\%r15\))?$/ox; |
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} elsif ($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 $re = qr/.*addi\.l.*r15,-(([0-9]{2}|[3-9])[0-9]{2}),r15/o; |
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} elsif ($arch =~ /^blackfin$/) { # 0: 00 e8 38 01 LINK 0x4e0; $re = qr/.*[[:space:]]LINK[[:space:]]*(0x$x{1,8})/o; |
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} elsif ($arch eq 'sparc' || $arch eq 'sparc64') { # f0019d10: 9d e3 bf 90 save %sp, -112, %sp $re = qr/.*save.*%sp, -(([0-9]{2}|[3-9])[0-9]{2}), %sp/o; |
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} else { |
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print("wrong or unknown architecture \"$arch\" "); |
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exit } } |
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# # main() # my $funcre = qr/^$x* <(.*)>:$/; |
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my ($func, $file, $lastslash); |
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while (my $line = <STDIN>) { if ($line =~ m/$funcre/) { $func = $1; } |
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elsif ($line =~ m/(.*):\s*file format/) { $file = $1; $file =~ s/\.ko//; $lastslash = rindex($file, "/"); if ($lastslash != -1) { $file = substr($file, $lastslash + 1); } } elsif ($line =~ m/$re/) { |
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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"; |
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my $intro = "$addr $func [$file]:"; |
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my $padlen = 56 - length($intro); while ($padlen > 0) { $intro .= ' '; $padlen -= 8; } next if ($size < 100); push @stack, "$intro$size "; } |
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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$size "; } |
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} |
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# Sort output by size (last field) print sort { ($b =~ /:\t*(\d+)$/)[0] <=> ($a =~ /:\t*(\d+)$/)[0] } @stack; |