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Message-Id: <20211120165349.99908-1-alex_y_xu@yahoo.ca>
Date: Sat, 20 Nov 2021 11:53:48 -0500
From: "Alex Xu (Hello71)" <alex_y_xu@...oo.ca>
To: Michael Forney <forney@...gle.com>,
Masahiro Yamada <yamada.masahiro@...ionext.com>,
Michal Marek <michal.lkml@...kovi.net>,
Nick Desaulniers <ndesaulniers@...gle.com>,
Nick Terrell <terrelln@...com>, Ingo Molnar <mingo@...nel.org>,
Sedat Dilek <sedat.dilek@...il.com>,
Kees Cook <keescook@...omium.org>,
linux-kernel@...r.kernel.org, linux-kbuild@...r.kernel.org
Cc: "Alex Xu (Hello71)" <alex_y_xu@...oo.ca>
Subject: [PATCH 1/2] kbuild: use perl instead of shell to get file size
This makes it easier to get the size of multiple files. Perl is already
a requirement for all builds to do header checks, so this is not an
additional dependency.
---
arch/arm/boot/deflate_xip_data.sh | 2 +-
arch/powerpc/boot/wrapper | 2 +-
scripts/Makefile.lib | 9 ++-------
scripts/file-size.pl | 8 ++++++++
scripts/file-size.sh | 4 ----
scripts/link-vmlinux.sh | 4 ++--
6 files changed, 14 insertions(+), 15 deletions(-)
create mode 100755 scripts/file-size.pl
delete mode 100755 scripts/file-size.sh
diff --git a/arch/arm/boot/deflate_xip_data.sh b/arch/arm/boot/deflate_xip_data.sh
index 304495c3c2c5..14cfa2babb93 100755
--- a/arch/arm/boot/deflate_xip_data.sh
+++ b/arch/arm/boot/deflate_xip_data.sh
@@ -43,7 +43,7 @@ data_start=$(($__data_loc - $base_offset))
data_end=$(($_edata_loc - $base_offset))
# Make sure data occupies the last part of the file.
-file_end=$(${CONFIG_SHELL} "${srctree}/scripts/file-size.sh" "$XIPIMAGE")
+file_end=$(${PERL} "${srctree}/scripts/file-size.pl" "$XIPIMAGE")
if [ "$file_end" != "$data_end" ]; then
printf "end of xipImage doesn't match with _edata_loc (%#x vs %#x)\n" \
$(($file_end + $base_offset)) $_edata_loc 1>&2
diff --git a/arch/powerpc/boot/wrapper b/arch/powerpc/boot/wrapper
index 9184eda780fd..9f9ee8613432 100755
--- a/arch/powerpc/boot/wrapper
+++ b/arch/powerpc/boot/wrapper
@@ -380,7 +380,7 @@ vmz="$tmpdir/`basename \"$kernel\"`.$ext"
# Calculate the vmlinux.strip size
${CROSS}objcopy $objflags "$kernel" "$vmz.$$"
-strip_size=$(${CONFIG_SHELL} "${srctree}/scripts/file-size.sh" "$vmz.$$")
+strip_size=$(${PERL} "${srctree}/scripts/file-size.pl" "$vmz.$$")
if [ -z "$cacheit" -o ! -f "$vmz$compression" -o "$vmz$compression" -ot "$kernel" ]; then
# recompress the image if we need to
diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
index d1f865b8c0cb..ca901814986a 100644
--- a/scripts/Makefile.lib
+++ b/scripts/Makefile.lib
@@ -379,13 +379,8 @@ dtc-tmp = $(subst $(comma),_,$(dot-target).dts.tmp)
# Bzip2 and LZMA do not include size in file... so we have to fake that;
# append the size as a 32-bit littleendian number as gzip does.
-size_append = printf $(shell \
-dec_size=0; \
-for F in $(real-prereqs); do \
- fsize=$$($(CONFIG_SHELL) $(srctree)/scripts/file-size.sh $$F); \
- dec_size=$$(expr $$dec_size + $$fsize); \
-done; \
-printf "%08x\n" $$dec_size | \
+total_size = $(shell $(PERL) $(srctree)/scripts/file-size.pl $(real-prereqs))
+size_append = printf $(shell printf "%08x\n" $(total_size) | \
sed 's/\(..\)/\1 /g' | { \
read ch0 ch1 ch2 ch3; \
for ch in $$ch3 $$ch2 $$ch1 $$ch0; do \
diff --git a/scripts/file-size.pl b/scripts/file-size.pl
new file mode 100755
index 000000000000..170bb6d048fa
--- /dev/null
+++ b/scripts/file-size.pl
@@ -0,0 +1,8 @@
+#!/usr/bin/perl -w
+# SPDX-License-Identifier: GPL-2.0
+my $total = 0;
+foreach (@ARGV) {
+ @stat = stat $_ or die "$_: $!";
+ $total += $stat[7];
+}
+print "$total\n";
diff --git a/scripts/file-size.sh b/scripts/file-size.sh
deleted file mode 100755
index 7eb7423416b5..000000000000
--- a/scripts/file-size.sh
+++ /dev/null
@@ -1,4 +0,0 @@
-#!/bin/sh
-# SPDX-License-Identifier: GPL-2.0
-set -- $(ls -dn "$1")
-printf '%s\n' "$5"
diff --git a/scripts/link-vmlinux.sh b/scripts/link-vmlinux.sh
index 5cdd9bc5c385..c3fa38bd18ab 100755
--- a/scripts/link-vmlinux.sh
+++ b/scripts/link-vmlinux.sh
@@ -384,8 +384,8 @@ if [ -n "${CONFIG_KALLSYMS}" ]; then
kallsyms_step 2
# step 3
- size1=$(${CONFIG_SHELL} "${srctree}/scripts/file-size.sh" ${kallsymso_prev})
- size2=$(${CONFIG_SHELL} "${srctree}/scripts/file-size.sh" ${kallsymso})
+ size1=$(${PERL} "${srctree}/scripts/file-size.pl" ${kallsymso_prev})
+ size2=$(${PERL} "${srctree}/scripts/file-size.pl" ${kallsymso})
if [ $size1 -ne $size2 ] || [ -n "${KALLSYMS_EXTRA_PASS}" ]; then
kallsyms_step 3
--
2.34.0
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