1 Scope of Document
This document describes how to product yaffs2 rootfs img file
2 Requiremen
2.1 Function Requirement
2.2 Performance Requirement
3 Method
3.1 Compile
root@vmuer-VirtualBox:/home/vmuer/tmp/nuc980bsp# cd yaffs2utils/
root@vmuer-VirtualBox:/home/vmuer/tmp/nuc980bsp/yaffs2utils# make
gcc -I. -I./yaffs2 -O2 -D_HAVE_BROKEN_MTD_H -Wall -Wshadow -Winline -Wpointer-arith -Wnested-externs -Wwrite-strings -Wstrict-prototypes -Wmissing-declarations -Wmissing-prototypes -Wredundant-decls -D_HAVE_MMAP -c -o yaffs2/yaffs_hweight.o yaffs2/yaffs_hweight.c
gcc -I. -I./yaffs2 -O2 -D_HAVE_BROKEN_MTD_H -Wall -Wshadow -Winline -Wpointer-arith -Wnested-externs -Wwrite-strings -Wstrict-prototypes -Wmissing-declarations -Wmissing-prototypes -Wredundant-decls -D_HAVE_MMAP -c -o yaffs2/yaffs_ecc.o yaffs2/yaffs_ecc.c
gcc -I. -I./yaffs2 -O2 -D_HAVE_BROKEN_MTD_H -Wall -Wshadow -Winline -Wpointer-arith -Wnested-externs -Wwrite-strings -Wstrict-prototypes -Wmissing-declarations -Wmissing-prototypes -Wredundant-decls -D_HAVE_MMAP -c -o yaffs2/yaffs_packedtags1.o yaffs2/yaffs_packedtags1.c
gcc -I. -I./yaffs2 -O2 -D_HAVE_BROKEN_MTD_H -Wall -Wshadow -Winline -Wpointer-arith -Wnested-externs -Wwrite-strings -Wstrict-prototypes -Wmissing-declarations -Wmissing-prototypes -Wredundant-decls -D_HAVE_MMAP -c -o yaffs2/yaffs_packedtags2.o yaffs2/yaffs_packedtags2.c
gcc -I. -I./yaffs2 -O2 -D_HAVE_BROKEN_MTD_H -Wall -Wshadow -Winline -Wpointer-arith -Wnested-externs -Wwrite-strings -Wstrict-prototypes -Wmissing-declarations -Wmissing-prototypes -Wredundant-decls -D_HAVE_MMAP -c -o safe_rw.o safe_rw.c
gcc -I. -I./yaffs2 -O2 -D_HAVE_BROKEN_MTD_H -Wall -Wshadow -Winline -Wpointer-arith -Wnested-externs -Wwrite-strings -Wstrict-prototypes -Wmissing-declarations -Wmissing-prototypes -Wredundant-decls -D_HAVE_MMAP -c -o endian_convert.o endian_convert.c
gcc -I. -I./yaffs2 -O2 -D_HAVE_BROKEN_MTD_H -Wall -Wshadow -Winline -Wpointer-arith -Wnested-externs -Wwrite-strings -Wstrict-prototypes -Wmissing-declarations -Wmissing-prototypes -Wredundant-decls -D_HAVE_MMAP -c -o progress_bar.o progress_bar.c
gcc -I. -I./yaffs2 -O2 -D_HAVE_BROKEN_MTD_H -Wall -Wshadow -Winline -Wpointer-arith -Wnested-externs -Wwrite-strings -Wstrict-prototypes -Wmissing-declarations -Wmissing-prototypes -Wredundant-decls -D_HAVE_MMAP -c -o mkyaffs2.o mkyaffs2.c
gcc -o mkyaffs2 yaffs2/yaffs_hweight.o yaffs2/yaffs_ecc.o yaffs2/yaffs_packedtags1.o yaffs2/yaffs_packedtags2.o safe_rw.o endian_convert.o progress_bar.o mkyaffs2.o -lm
gcc -I. -I./yaffs2 -O2 -D_HAVE_BROKEN_MTD_H -Wall -Wshadow -Winline -Wpointer-arith -Wnested-externs -Wwrite-strings -Wstrict-prototypes -Wmissing-declarations -Wmissing-prototypes -Wredundant-decls -D_HAVE_MMAP -c -o unyaffs2.o unyaffs2.c
unyaffs2.c: In function ‘unyaffs2_obj_chattr’:
unyaffs2.c:763:2: warning: ignoring return value of ‘lchown’, declared with attribute warn_unused_result [-Wunused-result]
lchown(fpath, obj->uid, obj->gid);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from unyaffs2.c:51:0:
At top level:
nand_ecclayout.h:44:25: warning: ‘nuc970_oobTb’ defined but not used [-Wunused-variable]
static nand_ecclayout_t nuc970_oobTb = {
^~~~~~~~~~~~
In file included from /usr/include/string.h:494:0,
from unyaffs2.c:26:
In function ‘memcpy’,
inlined from ‘unyaffs2_extract_hardlink.constprop’ at unyaffs2.c:1222:2,
inlined from ‘unyaffs2_extract_obj’ at unyaffs2.c:1289:10:
/usr/include/x86_64-linux-gnu/bits/string_fortified.h:34:10: warning: ‘__builtin___memcpy_chk’ writing 16 bytes into a region of size 8 overflows the destination [-Wstringop-overflow=]
return __builtin___memcpy_chk (__dest, __src, __len, __bos0 (__dest));
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
gcc -o unyaffs2 yaffs2/yaffs_hweight.o yaffs2/yaffs_ecc.o yaffs2/yaffs_packedtags1.o yaffs2/yaffs_packedtags2.o safe_rw.o endian_convert.o progress_bar.o unyaffs2.o -lm
gcc -I. -I./yaffs2 -O2 -D_HAVE_BROKEN_MTD_H -Wall -Wshadow -Winline -Wpointer-arith -Wnested-externs -Wwrite-strings -Wstrict-prototypes -Wmissing-declarations -Wmissing-prototypes -Wredundant-decls -D_HAVE_MMAP -c -o unspare2.o unspare2.c
gcc -o unspare2 yaffs2/yaffs_hweight.o yaffs2/yaffs_ecc.o yaffs2/yaffs_packedtags1.o yaffs2/yaffs_packedtags2.o safe_rw.o endian_convert.o progress_bar.o unspare2.o -lm
root@vmuer-VirtualBox:/home/vmuer/tmp/nuc980bsp/yaffs2utils# cd ..
root@vmuer-VirtualBox:/home/vmuer/tmp/nuc980bsp# ./yaffs2utils/mkyaffs2 --inband-tags -p 2048 -s 64 rootfs rootfs.yaffs2 && cp rootfs.yaffs2 /media/vmuer/share/image/
mkyaffs2 0.2.9_20120815: image building tool for YAFFS2.
stage 1: scanning directory 'rootfs'... [done]
scanning complete, total objects: 1555.
stage 2: creating image 'rootfs.yaffs2'
[==========================================================================================================================================================================================] 1555/1555 100%
operation complete,
1555 objects in 16333 NAND pages.
4 Output file
rootfs.yaffs2