ꦫꦣꦺꦤ꧀ꦄꦤ꧀ꦠꦱꦺꦤ

PATH: usr / src / linux-headers-5.4.0-215 / scripts

#!/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
#
# 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 =~ '^(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
		$re = qr/.*sub.*sp, sp, #(([0-9]{2}|[3-9])[0-9]{2})/o;
	} elsif ($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 '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
	}
}

#
# 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;

[+] ..
[-] ld-version.sh [edit]
[+] package
[-] stackusage [edit]
[-] pnmtologo.c [edit]
[-] gcc-plugin.sh [edit]
[-] setlocalversion [edit]
[-] stackdelta [edit]
[-] checkkconfigsymbols.py [edit]
[-] extract-cert.c [edit]
[-] extract-sys-certs.pl [edit]
[-] unifdef.c [edit]
[-] Makefile.extrawarn [edit]
[-] Makefile.kcov [edit]
[-] .gitignore [edit]
[-] documentation-file-ref-check [edit]
[-] parse-maintainers.pl [edit]
[-] Makefile.ubsan [edit]
[+] atomic
[-] checksyscalls.sh [edit]
[-] spdxcheck-test.sh [edit]
[-] recordmcount.h [edit]
[-] mkuboot.sh [edit]
[-] kallsyms.c [edit]
[-] link-vmlinux.sh [edit]
[-] sortextable.h [edit]
[-] show_delta [edit]
[-] Makefile.gcc-plugins [edit]
[-] ver_linux [edit]
[-] leaking_addresses.pl [edit]
[-] subarch.include [edit]
[-] check_extable.sh [edit]
[-] gcc-ld [edit]
[-] diffconfig [edit]
[-] bpf_helpers_doc.py [edit]
[-] decode_stacktrace.sh [edit]
[-] split-man.pl [edit]
[-] makelst [edit]
[-] mkcompile_h [edit]
[-] module-common.lds [edit]
[-] kmsg-doc [edit]
[-] Makefile [edit]
[-] Makefile.modbuiltin [edit]
[-] gcc-goto.sh [edit]
[-] mksysmap [edit]
[-] modules-check.sh [edit]
[-] nsdeps [edit]
[-] gcc-x86_64-has-stack-protector.sh [edit]
[-] ubuntu-retpoline-extract-one [edit]
[-] gen_compile_commands.py [edit]
[-] find-unused-docs.sh [edit]
[-] coccicheck [edit]
[-] gfp-translate [edit]
[-] Makefile.kasan [edit]
[-] config [edit]
[-] adjust_autoksyms.sh [edit]
[-] asn1_compiler.c [edit]
[+] mod
[-] cc-can-link.sh [edit]
[+] selinux
[-] checkpatch.pl [edit]
[+] coccinelle
[-] Makefile.modfinal [edit]
[-] headers_check.pl [edit]
[-] recordmcount.c [edit]
[-] sphinx-pre-install [edit]
[-] Makefile.modsign [edit]
[-] headers_install.sh [edit]
[-] patch-kernel [edit]
[-] xz_wrap.sh [edit]
[+] dtc
[+] basic
[+] tracing
[-] headerdep.pl [edit]
[-] const_structs.checkpatch [edit]
[-] extract_xc3028.pl [edit]
[-] tags.sh [edit]
[-] get_dvb_firmware [edit]
[-] Makefile.build [edit]
[-] clang-version.sh [edit]
[-] tools-support-relr.sh [edit]
[-] gcc-x86_32-has-stack-protector.sh [edit]
[-] bootgraph.pl [edit]
[-] gen_ksymdeps.sh [edit]
[-] Makefile.clean [edit]
[-] spdxcheck.py [edit]
[-] decodecode [edit]
[-] insert-sys-cert.c [edit]
[-] extract-module-sig.pl [edit]
[+] gdb
[-] sortextable.c [edit]
[-] prune-kernel [edit]
[+] kconfig
[-] cleanfile [edit]
[-] namespace.pl [edit]
[-] checkincludes.pl [edit]
[-] faddr2line [edit]
[-] checkstack.pl [edit]
[-] mkmakefile [edit]
[-] Makefile.lib [edit]
[+] ksymoops
[-] profile2linkerlist.pl [edit]
[-] gcc-version.sh [edit]
[-] Makefile.modpost [edit]
[-] recordmcount.pl [edit]
[-] extract-ikconfig [edit]
[-] bloat-o-meter [edit]
[-] Makefile.dtbinst [edit]
[-] kernel-doc [edit]
[-] Lindent [edit]
[+] gcc-plugins
[-] cleanpatch [edit]
[-] bin2c.c [edit]
[-] xen-hypercalls.sh [edit]
[-] markup_oops.pl [edit]
[-] checkversion.pl [edit]
[-] conmakehash.c [edit]
[-] Makefile.headersinst [edit]
[-] export_report.pl [edit]
[+] genksyms
[-] get_abi.pl [edit]
[-] Makefile.asm-generic [edit]
[-] objdiff [edit]
[-] sign-file.c [edit]
[-] depmod.sh [edit]
[-] file-size.sh [edit]
[-] Makefile.modinst [edit]
[-] Kconfig.include [edit]
[-] Makefile.host [edit]
[-] extract-vmlinux [edit]
[-] get_maintainer.pl [edit]
[-] Makefile.package [edit]
[-] spelling.txt [edit]
[-] Kbuild.include [edit]