forked from mirrors/linux
2b54aaef7a
I have been prime author and maintainer of block2mtd from day one, but neither MAINTAINERS nor the module source makes this fact clear. And while I'm at it, update my email addresses tree-wide, as the old address currently bounces and change my name to "joern" as unicode will likely continue to cause trouble until the end of this century. Signed-off-by: Joern Engel <joern@lazybastard.org> Cc: David Woodhouse <dwmw2@infradead.org> Cc: Andy Whitcroft <apw@shadowen.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
146 lines
4.2 KiB
Perl
Executable file
146 lines
4.2 KiB
Perl
Executable file
#!/usr/bin/perl
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# Check the stack usage of functions
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#
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# Copyright Joern Engel <joern@lazybastard.org>
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# Inspired by Linus Torvalds
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# Original idea maybe from Keith Owens
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# s390 port and big speedup by Arnd Bergmann <arnd@bergmann-dalldorf.de>
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# Mips port by Juan Quintela <quintela@mandrakesoft.com>
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# IA64 port via Andreas Dilger
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# Arm port by Holger Schurig
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# sh64 port by Paul Mundt
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# Random bits by Matt Mackall <mpm@selenic.com>
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# 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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#
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# Usage:
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# objdump -d vmlinux | scripts/checkstack.pl [arch]
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#
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# TODO : Port to all architectures (one regex per arch)
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# check for arch
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#
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# $re is used for two matches:
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# $& (whole re) matches the complete objdump line with the stack growth
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# $1 (first bracket) matches the size of the stack growth
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#
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# use anything else and feel the pain ;)
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my (@stack, $re, $x, $xs);
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{
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my $arch = shift;
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if ($arch eq "") {
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$arch = `uname -m`;
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}
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$x = "[0-9a-f]"; # hex character
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$xs = "[0-9a-f ]"; # hex character or space
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if ($arch eq 'arm') {
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#c0008ffc: e24dd064 sub sp, sp, #100 ; 0x64
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$re = qr/.*sub.*sp, sp, #(([0-9]{2}|[3-9])[0-9]{2})/o;
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} elsif ($arch eq 'avr32') {
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#8000008a: 20 1d sub sp,4
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#80000ca8: fa cd 05 b0 sub sp,sp,1456
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$re = qr/^.*sub.*sp.*,([0-9]{1,8})/o;
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} elsif ($arch =~ /^i[3456]86$/) {
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#c0105234: 81 ec ac 05 00 00 sub $0x5ac,%esp
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$re = qr/^.*[as][du][db] \$(0x$x{1,8}),\%esp$/o;
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} elsif ($arch eq 'x86_64') {
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# 2f60: 48 81 ec e8 05 00 00 sub $0x5e8,%rsp
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$re = qr/^.*[as][du][db] \$(0x$x{1,8}),\%rsp$/o;
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} elsif ($arch eq 'ia64') {
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#e0000000044011fc: 01 0f fc 8c adds r12=-384,r12
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$re = qr/.*adds.*r12=-(([0-9]{2}|[3-9])[0-9]{2}),r12/o;
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} elsif ($arch eq 'm68k') {
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# 2b6c: 4e56 fb70 linkw %fp,#-1168
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# 1df770: defc ffe4 addaw #-28,%sp
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$re = qr/.*(?:linkw %fp,|addaw )#-([0-9]{1,4})(?:,%sp)?$/o;
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} elsif ($arch eq 'mips64') {
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#8800402c: 67bdfff0 daddiu sp,sp,-16
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$re = qr/.*daddiu.*sp,sp,-(([0-9]{2}|[3-9])[0-9]{2})/o;
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} elsif ($arch eq 'mips') {
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#88003254: 27bdffe0 addiu sp,sp,-32
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$re = qr/.*addiu.*sp,sp,-(([0-9]{2}|[3-9])[0-9]{2})/o;
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} elsif ($arch eq 'parisc' || $arch eq 'parisc64') {
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$re = qr/.*ldo ($x{1,8})\(sp\),sp/o;
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} elsif ($arch eq 'ppc') {
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#c00029f4: 94 21 ff 30 stwu r1,-208(r1)
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$re = qr/.*stwu.*r1,-($x{1,8})\(r1\)/o;
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} elsif ($arch eq 'ppc64') {
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#XXX
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$re = qr/.*stdu.*r1,-($x{1,8})\(r1\)/o;
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} elsif ($arch eq 'powerpc') {
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$re = qr/.*st[dw]u.*r1,-($x{1,8})\(r1\)/o;
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} elsif ($arch =~ /^s390x?$/) {
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# 11160: a7 fb ff 60 aghi %r15,-160
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$re = qr/.*ag?hi.*\%r15,-(([0-9]{2}|[3-9])[0-9]{2})/o;
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} elsif ($arch =~ /^sh64$/) {
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#XXX: we only check for the immediate case presently,
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# though we will want to check for the movi/sub
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# pair for larger users. -- PFM.
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#a00048e0: d4fc40f0 addi.l r15,-240,r15
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$re = qr/.*addi\.l.*r15,-(([0-9]{2}|[3-9])[0-9]{2}),r15/o;
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} elsif ($arch =~ /^blackfin$/) {
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# 0: 00 e8 38 01 LINK 0x4e0;
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$re = qr/.*[[:space:]]LINK[[:space:]]*(0x$x{1,8})/o;
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} else {
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print("wrong or unknown architecture\n");
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exit
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}
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}
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sub bysize($) {
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my ($asize, $bsize);
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($asize = $a) =~ s/.*: *(.*)$/$1/;
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($bsize = $b) =~ s/.*: *(.*)$/$1/;
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$bsize <=> $asize
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}
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#
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# main()
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#
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my $funcre = qr/^$x* <(.*)>:$/;
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my $func;
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my $file, $lastslash;
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while (my $line = <STDIN>) {
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if ($line =~ m/$funcre/) {
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$func = $1;
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}
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elsif ($line =~ m/(.*):\s*file format/) {
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$file = $1;
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$file =~ s/\.ko//;
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$lastslash = rindex($file, "/");
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if ($lastslash != -1) {
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$file = substr($file, $lastslash + 1);
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}
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}
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elsif ($line =~ m/$re/) {
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my $size = $1;
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$size = hex($size) if ($size =~ /^0x/);
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if ($size > 0xf0000000) {
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$size = - $size;
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$size += 0x80000000;
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$size += 0x80000000;
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}
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next if ($size > 0x10000000);
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next if $line !~ m/^($xs*)/;
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my $addr = $1;
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$addr =~ s/ /0/g;
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$addr = "0x$addr";
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my $intro = "$addr $func [$file]:";
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my $padlen = 56 - length($intro);
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while ($padlen > 0) {
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$intro .= ' ';
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$padlen -= 8;
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}
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next if ($size < 100);
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push @stack, "$intro$size\n";
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}
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}
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print sort bysize @stack;
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