^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) #!/usr/bin/env perl
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) # SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) # Check the stack usage of functions
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) #
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) # Copyright Joern Engel <joern@lazybastard.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) # Inspired by Linus Torvalds
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) # Original idea maybe from Keith Owens
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) # s390 port and big speedup by Arnd Bergmann <arnd@bergmann-dalldorf.de>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) # Mips port by Juan Quintela <quintela@mandrakesoft.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) # IA64 port via Andreas Dilger
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) # Arm port by Holger Schurig
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) # sh64 port by Paul Mundt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) # Random bits by Matt Mackall <mpm@selenic.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) # M68k port by Geert Uytterhoeven and Andreas Schwab
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) # AArch64, PARISC ports by Kyle McMartin
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) # sparc port by Martin Habets <errandir_news@mph.eclipse.co.uk>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) # ppc64le port by Breno Leitao <leitao@debian.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) # Usage:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) # objdump -d vmlinux | scripts/checkstack.pl [arch]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) # TODO : Port to all architectures (one regex per arch)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) use strict;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) # check for arch
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) # $re is used for two matches:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) # $& (whole re) matches the complete objdump line with the stack growth
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) # $1 (first bracket) matches the size of the stack growth
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) # $dre is similar, but for dynamic stack redutions:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) # $& (whole re) matches the complete objdump line with the stack growth
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) # $1 (first bracket) matches the dynamic amount of the stack growth
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) #
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) # $sub: subroutine for special handling to check stack usage.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) #
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) # use anything else and feel the pain ;)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) my (@stack, $re, $dre, $sub, $x, $xs, $funcre, $min_stack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) my $arch = shift;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) if ($arch eq "") {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) $arch = `uname -m`;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) chomp($arch);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) $min_stack = shift;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) if ($min_stack eq "" || $min_stack !~ /^\d+$/) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) $min_stack = 100;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) $x = "[0-9a-f]"; # hex character
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) $xs = "[0-9a-f ]"; # hex character or space
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) $funcre = qr/^$x* <(.*)>:$/;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) if ($arch =~ '^(aarch|arm)64$') {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) #ffffffc0006325cc: a9bb7bfd stp x29, x30, [sp, #-80]!
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) #a110: d11643ff sub sp, sp, #0x590
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) $re = qr/^.*stp.*sp, \#-([0-9]{1,8})\]\!/o;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) $dre = qr/^.*sub.*sp, sp, #(0x$x{1,8})/o;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) } elsif ($arch eq 'arm') {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) #c0008ffc: e24dd064 sub sp, sp, #100 ; 0x64
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) $re = qr/.*sub.*sp, sp, #([0-9]{1,4})/o;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) $sub = \&arm_push_handling;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) } elsif ($arch =~ /^x86(_64)?$/ || $arch =~ /^i[3456]86$/) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) #c0105234: 81 ec ac 05 00 00 sub $0x5ac,%esp
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) # or
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) # 2f60: 48 81 ec e8 05 00 00 sub $0x5e8,%rsp
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) $re = qr/^.*[as][du][db] \$(0x$x{1,8}),\%(e|r)sp$/o;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) $dre = qr/^.*[as][du][db] (%.*),\%(e|r)sp$/o;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) } elsif ($arch eq 'ia64') {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) #e0000000044011fc: 01 0f fc 8c adds r12=-384,r12
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) $re = qr/.*adds.*r12=-(([0-9]{2}|[3-9])[0-9]{2}),r12/o;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) } elsif ($arch eq 'm68k') {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) # 2b6c: 4e56 fb70 linkw %fp,#-1168
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) # 1df770: defc ffe4 addaw #-28,%sp
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) $re = qr/.*(?:linkw %fp,|addaw )#-([0-9]{1,4})(?:,%sp)?$/o;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) } elsif ($arch eq 'mips64') {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) #8800402c: 67bdfff0 daddiu sp,sp,-16
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) $re = qr/.*daddiu.*sp,sp,-(([0-9]{2}|[3-9])[0-9]{2})/o;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) } elsif ($arch eq 'mips') {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) #88003254: 27bdffe0 addiu sp,sp,-32
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) $re = qr/.*addiu.*sp,sp,-(([0-9]{2}|[3-9])[0-9]{2})/o;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) } elsif ($arch eq 'nios2') {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) #25a8: defffb04 addi sp,sp,-20
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) $re = qr/.*addi.*sp,sp,-(([0-9]{2}|[3-9])[0-9]{2})/o;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) } elsif ($arch eq 'openrisc') {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) # c000043c: 9c 21 fe f0 l.addi r1,r1,-272
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) $re = qr/.*l\.addi.*r1,r1,-(([0-9]{2}|[3-9])[0-9]{2})/o;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) } elsif ($arch eq 'parisc' || $arch eq 'parisc64') {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) $re = qr/.*ldo ($x{1,8})\(sp\),sp/o;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) } elsif ($arch eq 'powerpc' || $arch =~ /^ppc(64)?(le)?$/ ) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) # powerpc : 94 21 ff 30 stwu r1,-208(r1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) # ppc64(le) : 81 ff 21 f8 stdu r1,-128(r1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) $re = qr/.*st[dw]u.*r1,-($x{1,8})\(r1\)/o;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) } elsif ($arch =~ /^s390x?$/) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) # 11160: a7 fb ff 60 aghi %r15,-160
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) # or
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) # 100092: e3 f0 ff c8 ff 71 lay %r15,-56(%r15)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) $re = qr/.*(?:lay|ag?hi).*\%r15,-(([0-9]{2}|[3-9])[0-9]{2})
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) (?:\(\%r15\))?$/ox;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) } elsif ($arch =~ /^sh64$/) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) #XXX: we only check for the immediate case presently,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) # though we will want to check for the movi/sub
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) # pair for larger users. -- PFM.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) #a00048e0: d4fc40f0 addi.l r15,-240,r15
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) $re = qr/.*addi\.l.*r15,-(([0-9]{2}|[3-9])[0-9]{2}),r15/o;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) } elsif ($arch eq 'sparc' || $arch eq 'sparc64') {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) # f0019d10: 9d e3 bf 90 save %sp, -112, %sp
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) $re = qr/.*save.*%sp, -(([0-9]{2}|[3-9])[0-9]{2}), %sp/o;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) print("wrong or unknown architecture \"$arch\"\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) exit
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) #
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) # To count stack usage of push {*, fp, ip, lr, pc} instruction in ARM,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) # if FRAME POINTER is enabled.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) # e.g. c01f0d48: e92ddff0 push {r4, r5, r6, r7, r8, r9, sl, fp, ip, lr, pc}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) #
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) sub arm_push_handling {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) my $regex = qr/.*push.*fp, ip, lr, pc}/o;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) my $size = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) my $line_arg = shift;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) if ($line_arg =~ m/$regex/) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) $size = $line_arg =~ tr/,//;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) $size = ($size + 1) * 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) return $size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) #
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) # main()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) #
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) my ($func, $file, $lastslash, $total_size, $addr, $intro);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) $total_size = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) while (my $line = <STDIN>) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) if ($line =~ m/$funcre/) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) $func = $1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) next if $line !~ m/^($xs*)/;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) if ($total_size > $min_stack) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) push @stack, "$intro$total_size\n";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) $addr = $1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) $addr =~ s/ /0/g;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) $addr = "0x$addr";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) $intro = "$addr $func [$file]:";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) my $padlen = 56 - length($intro);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) while ($padlen > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) $intro .= ' ';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) $padlen -= 8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) $total_size = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) elsif ($line =~ m/(.*):\s*file format/) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) $file = $1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) $file =~ s/\.ko//;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) $lastslash = rindex($file, "/");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) if ($lastslash != -1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) $file = substr($file, $lastslash + 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) elsif ($line =~ m/$re/) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) my $size = $1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) $size = hex($size) if ($size =~ /^0x/);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) if ($size > 0xf0000000) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) $size = - $size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) $size += 0x80000000;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) $size += 0x80000000;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) next if ($size > 0x10000000);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) $total_size += $size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) elsif (defined $dre && $line =~ m/$dre/) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) my $size = $1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) $size = hex($size) if ($size =~ /^0x/);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) $total_size += $size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) elsif (defined $sub) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) my $size = &$sub($line);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) $total_size += $size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) if ($total_size > $min_stack) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) push @stack, "$intro$total_size\n";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) # Sort output by size (last field)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) print sort { ($b =~ /:\t*(\d+)$/)[0] <=> ($a =~ /:\t*(\d+)$/)[0] } @stack;
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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