From dc10b4300af949e4867ca892a394655e43f17d3c Mon Sep 17 00:00:00 2001
From: Antti Kantee <pooka@iki.fi>
Date: Mon, 15 Feb 2016 12:21:10 +0000
Subject: [PATCH] cookfs: warn if image is >1MB.

---
 app-tools/Makefile             | 2 ++
 app-tools/cookfs.in            | 8 ++++++++
 lib/librumprunfs_base/Makefile | 4 +++-
 3 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/app-tools/Makefile b/app-tools/Makefile
index beb5b6f..beb39b8 100644
--- a/app-tools/Makefile
+++ b/app-tools/Makefile
@@ -58,6 +58,7 @@ MACHDIR:= rumprun-${MACHINE_GNU_ARCH}-${PLATFORM}
 LIBEXEC_CC:= $(subst ${BRSOURCEDIR},${BRLIBEXECDEST},${CC})
 LIBEXEC_CXX:= $(subst ${BRSOURCEDIR},${BRLIBEXECDEST},${CXX})
 LIBEXEC_OBJCOPY:= ${BRLIBEXECDEST}/${MACHINE_GNU_PLATFORM}-objcopy
+LIBEXEC_SIZE:= ${BRLIBEXECDEST}/${MACHINE_GNU_PLATFORM}-size
 LIBEXEC_READELF:= ${BRLIBEXECDEST}/${MACHINE_GNU_PLATFORM}-readelf
 
 TOOLS_CC := ${RRDEST}/bin/$(TOOLTUPLE)-${_CCVARIANT}
@@ -73,6 +74,7 @@ ${TOOLOBJ}/${2}: ${1} Makefile ${TOOLOBJ}
 		-e 's#!LIBEXEC_CXX!#$(LIBEXEC_CXX)#g;'			\
 		-e 's#!LIBEXEC_OBJCOPY!#$(LIBEXEC_OBJCOPY)#g;'		\
 		-e 's#!LIBEXEC_READELF!#$(LIBEXEC_READELF)#g;'		\
+		-e 's#!LIBEXEC_SIZE!#$(LIBEXEC_SIZE)#g;'		\
 		-e 's#!TOOLS_CC!#$(TOOLS_CC)#g;'			\
 		-e 's#!TOOLS_CXX!#$(TOOLS_CXX)#g;'			\
 		-e 's#!MACHINE_GNU_ARCH!#$(MACHINE_GNU_ARCH)#g;'	\
diff --git a/app-tools/cookfs.in b/app-tools/cookfs.in
index 2c920ea..4972b3f 100644
--- a/app-tools/cookfs.in
+++ b/app-tools/cookfs.in
@@ -35,6 +35,7 @@ set -eu
 
 : ${RUMPRUN_COOKFS_CC:=!LIBEXEC_CC!}
 : ${RUMPRUN_COOKFS_OBJCOPY:=!LIBEXEC_OBJCOPY!}
+: ${RUMPRUN_COOKFS_SIZE:=!LIBEXEC_SIZE!}
 : ${RUMPRUN_COOKFS_INCDIR:=!DESTDIR!/rumprun-!MACHINE_GNU_ARCH!/include}
 
 usage ()
@@ -235,4 +236,11 @@ ${RUMPRUN_COOKFS_CC} !CFLAGS! !CPPFLAGS! -I${RUMPRUN_COOKFS_INCDIR}	\
     -nostdlib -Wl,-r -o ${TMPDIR}/fin.o ${TMPDIR}/d*.o ${TMPDIR}/constr.c
 ${RUMPRUN_COOKFS_OBJCOPY} ${LSYM} ${TMPDIR}/fin.o ${OUTFILE}
 
+totsize=$(${RUMPRUN_COOKFS_SIZE} ${OUTFILE} | awk 'NR == 2{print $4}')
+if [ ${totsize} -gt $((1024*1024)) ]; then
+	echo ">> WARNING: cookfs images will be loaded into memory." 2>&1
+	echo ">> Maximum recommended size is 1024 kB." 2>&1
+	echo ">> Your image memory footprint is $((${totsize}/1024)) kB." 2>&1
+fi
+
 exit 0
diff --git a/lib/librumprunfs_base/Makefile b/lib/librumprunfs_base/Makefile
index 11fd14c..9796ce5 100644
--- a/lib/librumprunfs_base/Makefile
+++ b/lib/librumprunfs_base/Makefile
@@ -10,7 +10,9 @@ includes:
 
 dependall:
 	( cd ${.CURDIR} &&						\
-	  RUMPRUN_COOKFS_CC="${CC}" RUMPRUN_COOKFS_OBJCOPY="${OBJCOPY}"	\
+	  RUMPRUN_COOKFS_CC="${CC}"					\
+	  RUMPRUN_COOKFS_OBJCOPY="${OBJCOPY}"				\
+	  RUMPRUN_COOKFS_SIZE="${SIZE}"					\
 	    RUMPRUN_COOKFS_INCDIR="${RROBJ}/dest.stage/include"		\
 		${RROBJ}/app-tools/${TOOLTUPLE}-cookfs -s 1		\
 		    ${MAKEOBJDIR}/librumprunfs_base.a rootfs )
-- 
2.39.5