| #!/usr/bin/perl |
| |
| # Check the stack usage of functions |
| # |
| # 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> |
| # 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 |
| # AVR32 port by Haavard Skinnemoen (Atmel) |
| # AArch64, PARISC ports by Kyle McMartin |
| # sparc port by Martin Habets <errandir_news@mph.eclipse.co.uk> |
| # |
| # Usage: |
| # objdump -d vmlinux | scripts/checkstack.pl [arch] |
| # |
| # TODO : Port to all architectures (one regex per arch) |
| |
| use strict; |
| |
| # 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 |
| # |
| # $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, $dre, $x, $xs, $funcre); |
| { |
| my $arch = shift; |
| if ($arch eq "") { |
| $arch = `uname -m`; |
| chomp($arch); |
| } |
| |
| $x = "[0-9a-f]"; # hex character |
| $xs = "[0-9a-f ]"; # hex character or space |
| $funcre = qr/^$x* <(.*)>:$/; |
| if ($arch eq 'aarch64') { |
| #ffffffc0006325cc: a9bb7bfd stp x29, x30, [sp,#-80]! |
| $re = qr/^.*stp.*sp,\#-([0-9]{1,8})\]\!/o; |
| } elsif ($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 =~ /^x86(_64)?$/ || $arch =~ /^i[3456]86$/) { |
| #c0105234: 81 ec ac 05 00 00 sub $0x5ac,%esp |
| # or |
| # 2f60: 48 81 ec e8 05 00 00 sub $0x5e8,%rsp |
| $re = qr/^.*[as][du][db] \$(0x$x{1,8}),\%(e|r)sp$/o; |
| $dre = qr/^.*[as][du][db] (%.*),\%(e|r)sp$/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 'metag') { |
| #400026fc: 40 00 00 82 ADD A0StP,A0StP,#0x8 |
| $re = qr/.*ADD.*A0StP,A0StP,\#(0x$x{1,8})/o; |
| $funcre = qr/^$x* <[^\$](.*)>:$/; |
| } elsif ($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 'nios2') { |
| #25a8: defffb04 addi sp,sp,-20 |
| $re = qr/.*addi.*sp,sp,-(([0-9]{2}|[3-9])[0-9]{2})/o; |
| } elsif ($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 |
| # 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}) |
| (?:\(\%r15\))?$/ox; |
| } elsif ($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 |
| $re = qr/.*addi\.l.*r15,-(([0-9]{2}|[3-9])[0-9]{2}),r15/o; |
| } elsif ($arch =~ /^blackfin$/) { |
| # 0: 00 e8 38 01 LINK 0x4e0; |
| $re = qr/.*[[:space:]]LINK[[:space:]]*(0x$x{1,8})/o; |
| } elsif ($arch eq 'sparc' || $arch eq 'sparc64') { |
| # f0019d10: 9d e3 bf 90 save %sp, -112, %sp |
| $re = qr/.*save.*%sp, -(([0-9]{2}|[3-9])[0-9]{2}), %sp/o; |
| } else { |
| print("wrong or unknown architecture \"$arch\"\n"); |
| exit |
| } |
| } |
| |
| # |
| # main() |
| # |
| my ($func, $file, $lastslash); |
| |
| while (my $line = <STDIN>) { |
| if ($line =~ m/$funcre/) { |
| $func = $1; |
| } |
| elsif ($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/) { |
| 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 $func [$file]:"; |
| my $padlen = 56 - length($intro); |
| while ($padlen > 0) { |
| $intro .= ' '; |
| $padlen -= 8; |
| } |
| next if ($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$size\n"; |
| } |
| } |
| |
| # Sort output by size (last field) |
| print sort { ($b =~ /:\t*(\d+)$/)[0] <=> ($a =~ /:\t*(\d+)$/)[0] } @stack; |