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scripts/checkstack.pl: add arm push handling for stack usage

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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}

c01f0d50 <Y>:
c01f0d44:       e1a0c00d        mov     ip, sp
c01f0d48:       e92ddff0        push    {r4, r5, r6, r7, r8, r9, sl, fp, ip, lr, pc}
c01f0d4c:       e24cb004        sub     fp, ip, #4
c01f0d50:       e24dd094        sub     sp, sp, #448    ; 0x1C0

$ cat dump | scripts/checkstack.pl arm
0xc01f0d50 Y []:                                        448

added subroutine frame work for this.
After change:
0xc01f0d500 Y []:                                       492

Co-developed-by: Vaneet Narang <v.narang@samsung.com>
Signed-off-by: Vaneet Narang <v.narang@samsung.com>
Signed-off-by: Maninder Singh <maninder1.s@samsung.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
This commit is contained in:
Maninder Singh 2020-05-08 16:33:16 +05:30 committed by Masahiro Yamada
parent 572220aad5
commit 3311eeebae
1 changed files with 27 additions and 1 deletions
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28
scripts/checkstack.pl
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@ -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 "") {
@ -59,6 +61,7 @@ my (@stack, $re, $dre, $x, $xs, $funcre, $min_stack);
} elsif ($arch eq 'arm') {
#c0008ffc: e24dd064 sub sp, sp, #100 ; 0x64
$re = qr/.*sub.*sp, sp, #(([0-9]{2}|[3-9])[0-9]{2})/o;
$sub = \&arm_push_handling;
} elsif ($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";