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authorBernhard Reutner-Fischer <rep.dot.nop@gmail.com>2019-01-17 22:21:53 +0100
committerBernhard Reutner-Fischer <rep.dot.nop@gmail.com>2019-01-17 22:59:45 +0100
commitf59739a66361367c29aa1c68600b91ff2212d5f7 (patch)
treef6cdd816a358dab98087d27edb9d808ec1d05044
parentfe7ae562e5d0121d1c5f4d3ba1ec4117c7bbaab8 (diff)
downloadbusybox-f59739a66361367c29aa1c68600b91ff2212d5f7.tar.gz
checkstack: pull from upstream
merge upstream changes Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
-rwxr-xr-xscripts/checkstack.pl107
1 files changed, 75 insertions, 32 deletions
diff --git a/scripts/checkstack.pl b/scripts/checkstack.pl
index b5980a2e3..7833554c8 100755
--- a/scripts/checkstack.pl
+++ b/scripts/checkstack.pl
@@ -1,10 +1,11 @@
-#!/usr/bin/perl
+#!/usr/bin/env perl
+# SPDX-License-Identifier: GPL-2.0
# Stolen from Linux kernel :)
# 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>
@@ -14,41 +15,57 @@
# sh64 port by Paul Mundt
# Random bits by Matt Mackall <mpm@selenic.com>
# M68k port by Geert Uytterhoeven and Andreas Schwab
+# blackfin port by Alex Landau
+# AArch64, PARISC ports by Kyle McMartin
+# sparc port by Martin Habets <errandir_news@mph.eclipse.co.uk>
+# ppc64le port by Breno Leitao <leitao@debian.org>
#
# Usage:
-# objdump -d vmlinux | checkstack.pl [arch]
+# 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 reductions:
+# $& (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, $funcre);
{
my $arch = shift;
if ($arch eq "") {
$arch = `uname -m`;
- 1 while chomp $arch;
+ chomp($arch);
}
$x = "[0-9a-f]"; # hex character
$xs = "[0-9a-f ]"; # hex character or space
- if ($arch eq 'arm') {
+ $funcre = qr/^$x* <(.*)>:$/;
+ if ($arch eq 'aarch64') {
+ #ffffffc0006325cc: a9bb7bfd stp x29, x30, [sp, #-80]!
+ #a110: d11643ff sub sp, sp, #0x590
+ $re = qr/^.*stp.*sp, \#-([0-9]{1,8})\]\!/o;
+ $dre = qr/^.*sub.*sp, sp, #(0x$x{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 =~ /^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 'blackfin') {
# 52: 00 e8 03 00 LINK 0xc;
$re = qr/.*LINK (0x$x{1,5});$/o;
- } elsif ($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 eq 'x86_64') {
- # 2f60: 48 81 ec e8 05 00 00 sub $0x5e8,%rsp
- $re = qr/^.*[as][du][db] \$(0x$x{1,8}),\%rsp$/o;
} elsif ($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;
@@ -62,42 +79,43 @@ my (@stack, $re, $x, $xs);
} elsif ($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 '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 ($arch eq 'powerpc') {
+ } elsif ($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 'openrisc') {
+ # c000043c: 9c 21 fe f0 l.addi r1,r1,-272
+ $re = qr/.*l\.addi.*r1,r1,-(([0-9]{2}|[3-9])[0-9]{2})/o;
+ } elsif ($arch eq 'parisc' || $arch eq 'parisc64') {
+ $re = qr/.*ldo ($x{1,8})\(sp\),sp/o;
+ } elsif ($arch eq 'powerpc' || $arch =~ /^ppc(64)?(le)?$/ ) {
+ # powerpc : 94 21 ff 30 stwu r1,-208(r1)
+ # ppc64(le) : 81 ff 21 f8 stdu r1,-128(r1)
$re = qr/.*st[dw]u.*r1,-($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;
+ # 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 eq 'sparc' || $arch eq 'sparc64') {
+ # f0019d10: 9d e3 bf 90 save %sp, -112, %sp
+ $re = qr/.*save.*%sp, -(([0-9]{2}|[3-9])[0-9]{2}), %sp/o;
} else {
- print("wrong or unknown architecture\n");
+ print("wrong or unknown architecture \"$arch\"\n");
exit
}
}
-sub bysize($) {
- my ($asize, $bsize);
- ($asize = $a) =~ s/.*: *(.*)$/$1/;
- ($bsize = $b) =~ s/.*: *(.*)$/$1/;
- $bsize <=> $asize
-}
-
#
# main()
#
-my $funcre = qr/^$x* <(.*)>:$/;
-my $func;
-my $file, $lastslash;
+my ($func, $file, $lastslash);
while (my $line = <STDIN>) {
if ($line =~ m/$funcre/) {
@@ -137,6 +155,31 @@ while (my $line = <STDIN>) {
next if ($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";
+
+ #bbox: was: my $intro = "$addr $func [$file]:";
+ my $intro = "$func [$file]:";
+ my $padlen = 56 - length($intro);
+ while ($padlen > 0) {
+ $intro .= ' ';
+ $padlen -= 8;
+ }
+ push @stack, "$intro$size\n";
+ }
+}
+
+sub bysize($) {
+ my ($asize, $bsize);
+ ($asize = $a) =~ s/.*: *(.*)$/$1/;
+ ($bsize = $b) =~ s/.*: *(.*)$/$1/;
+ $bsize <=> $asize
}
-print sort bysize @stack;
+# Sort output by size (last field)
+print sort { ($b =~ /:\t*(\d+)$/)[0] <=> ($a =~ /:\t*(\d+)$/)[0] } @stack;