checkstack: pull from upstream

merge upstream changes

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

diff --git a/scripts/checkstack.pl b/scripts/checkstack.pl
index b5980a2e3bafad8bb1c9149961397f7be0aca2f6..7833554c8e73db49bcad76a818153531654937f7 100755 (executable)
--- 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;