kbuild: remove deprecated 'always' and 'hostprogs-y/m'

[mirror_ubuntu-jammy-kernel.git] / scripts / checkstack.pl

diff --git a/scripts/checkstack.pl b/scripts/checkstack.pl
index bc23cc7edcaaf3ae32f4ce5a43d6193d8af7f6c4..d2c38584ece6fec4901f8c44efaabd898de632e1 100755 (executable)
--- a/scripts/checkstack.pl
+++ b/scripts/checkstack.pl
@@ -34,8 +34,10 @@ use strict;
 # $& (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, $x, $xs, $funcre, $min_stack);
+my (@stack, $re, $dre, $sub, $x, $xs, $funcre, $min_stack);
 {
        my $arch = shift;
        if ($arch eq "") {
@@ -58,7 +60,8 @@ my (@stack, $re, $dre, $x, $xs, $funcre, $min_stack);
                $dre = qr/^.*sub.*sp, sp, #(0x$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;
+               $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
@@ -111,6 +114,24 @@ my (@stack, $re, $dre, $x, $xs, $funcre, $min_stack);
        }
 }
 
+#
+# 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()
 #
@@ -166,6 +187,11 @@ while (my $line = <STDIN>) {
                $size = hex($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";