Orange Pi5 kernel

#!/usr/bin/env perl
# SPDX-License-Identifier: GPL-2.0
 
#	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
#	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 | 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
#
# $sub: subroutine for special handling to check stack usage.
#
# use anything else and feel the pain ;)
my (@stack, $re, $dre, $sub, $x, $xs, $funcre, $min_stack);
{
<------>my $arch = shift;
<------>if ($arch eq "") {
<------><------>$arch = `uname -m`;
<------><------>chomp($arch);
<------>}
 
<------>$min_stack = shift;
<------>if ($min_stack eq "" || $min_stack !~ /^\d+$/) {
<------><------>$min_stack = 100;
<------>}
 
<------>$x	= "[0-9a-f]";	# hex character
<------>$xs	= "[0-9a-f ]";	# hex character or space
<------>$funcre = qr/^$x* <(.*)>:$/;
<------>if ($arch =~ '^(aarch|arm)64$') {
<------><------>#ffffffc0006325cc:       a9bb7bfd        stp     x29, x30, [sp, #-80]!
<------><------>#a110:       d11643ff        sub     sp, sp, #0x590
<------><------>$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]{1,4})/o;
<------><------>$sub = \&arm_push_handling;
<------>} elsif ($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 '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 '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
<------><------># 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 \"$arch\"\n");
<------><------>exit
<------>}
}
 
#
# To count stack usage of push {*, fp, ip, lr, pc} instruction in ARM,
# if FRAME POINTER is enabled.
# e.g. c01f0d48: e92ddff0 push {r4, r5, r6, r7, r8, r9, sl, fp, ip, lr, pc}
#
sub arm_push_handling {
<------>my $regex = qr/.*push.*fp, ip, lr, pc}/o;
<------>my $size = 0;
<------>my $line_arg = shift;
 
<------>if ($line_arg =~ m/$regex/) {
<------><------>$size = $line_arg =~ tr/,//;
<------><------>$size = ($size + 1) * 4;
<------>}
 
<------>return $size;
}
 
#
# main()
#
my ($func, $file, $lastslash, $total_size, $addr, $intro);
 
$total_size = 0;
 
while (my $line = <STDIN>) {
<------>if ($line =~ m/$funcre/) {
<------><------>$func = $1;
<------><------>next if $line !~ m/^($xs*)/;
<------><------>if ($total_size > $min_stack) {
<------><------><------>push @stack, "$intro$total_size\n";
<------><------>}
 
<------><------>$addr = $1;
<------><------>$addr =~ s/ /0/g;
<------><------>$addr = "0x$addr";
 
<------><------>$intro = "$addr $func [$file]:";
<------><------>my $padlen = 56 - length($intro);
<------><------>while ($padlen > 0) {
<------><------><------>$intro .= '	';
<------><------><------>$padlen -= 8;
<------><------>}
 
<------><------>$total_size = 0;
<------>}
<------>elsif ($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);
 
<------><------>$total_size += $size;
<------>}
<------>elsif (defined $dre && $line =~ m/$dre/) {
<------><------>my $size = $1;
 
<------><------>$size = hex($size) if ($size =~ /^0x/);
<------><------>$total_size += $size;
<------>}
<------>elsif (defined $sub) {
<------><------>my $size = &$sub($line);
 
<------><------>$total_size += $size;
<------>}
}
if ($total_size > $min_stack) {
<------>push @stack, "$intro$total_size\n";
}
 
# Sort output by size (last field)
print sort { ($b =~ /:\t*(\d+)$/)[0] <=> ($a =~ /:\t*(\d+)$/)[0] } @stack;