• toolchain from openmoko
• Toolchain
• openmoko android porting

• Download Sourcery G++ Lite Edition for ARM 바이너리 tar 다운로드
• 설치한 곳의 path 추가 ~/.bashrc

export PATH=~/apps/toolchains/arm-2009q1/bin:$PATH

• man alias 설치 ~/.bash_aliases

alias armman="MANPATH=~/apps/toolchains/arm-2009q1/share/doc/arm-arm-none-eabi/man/ man"

• Makefile에 환경변수 전달

$ make uImage ARCH=arm CROSS_COMPILE=/path/to/toolchain/prefix-

• ARMv4 - Little-Endian, Soft-Float
  • Command-line option(s): default
  • Library subdirectory: ./
• ARMv4 Thumb - Little-Endian, Soft-Float
  • Command-line option(s): -mthumb
  • Library subdirectory: thumb/
• ARMv7 Thumb-2 - Little-Endian, Soft-Float
  • Command-line option(s): -mthumb -march=armv7 -mfix-cortex-m3-ldrd
  • Library subdirectory: thumb2/
• ARMv6-M Thumb - Little-Endian, Soft-Float
  • Command-line option(s): -mthumb -march=armv6-m
  • Library subdirectory: armv6-m/

참조

• ar - Create, modify, and extract from archives
• nm - List symbols from object les
• objcopy - Copy and translate object les
• objdump - Display information from object les
• ranlib - Generate index to archive contents
• readelf - Display the contents of ELF format les.
• size List - le section sizes and total size
• strings - List printable strings from les
• strip - Discard symbols
• c++filt - Demangle encoded C++ symbols (on MS-DOS, this program is named cxxfilt)
• addr2line - Convert addresses into le names and line numbers

컴파일시 define 되었나 알아보기

<noth> suapapa_m12, gcc -DNOTH -dM -E hello.c | grep NOTH
<noth> #define NOTH 1

• 32MB RAM
• 32MN Flash Memory
• 200MHz Online Processor

• MRP-SC2440 (Rebis)
  • Ram : 64M Bytes (32M Bytes x 2)
  • Boot Rom :
    • AMD NOR 4M Bytes
    • Intel StrataFlash 16M Bytes (optional)
• s3c2440
  • nand boot (4KB internal buffer for booting)
• ARM920T Technical Reference Manual (pdf) -
  • ARM9TDMI integer core, (ARM architecture v4T)

• ez-s3c2440
• ARMv5 S3C2440 LCD포함 40만원 미만
• ARMv6 S3C6410 LCD포함 100만원 미만

기존 u-boot는 gcc version 4.3.3 (Sourcery G++ Lite 2009q1-161) 에서 컴파일 에러. 아래 패치를 적용하여 코드 수정

$ tar xvzf mds-u-boot.tar.gz
...
$ cd mds-u-boot-rebis
$ patch -p1 < ../u-boot_compile_with_sourcery_g++.patch 
patching file Makefile
patching file common/cmd_nand_s3c2440a.c
patching file cpu/arm920t/config.mk
patching file net/net.c
patching file net/tftp.c

nand 부팅 빌드

$ make distclean
...
$ make clean
...
$ make rebis_atm322a_config
...
$ CROSS_COMPILE=arm-none-eabi- make
...

빌드 결과물 확인

$ ls u-boot*
u-boot  u-boot.bin  u-boot.map  u-boot.srec
$ file u-boot
u-boot: ELF 32-bit LSB executable, ARM, version 1 (SYSV), statically linked, not stripped
$ arm-none-eabi-readelf -h u-boot |grep Flags
  Flags:                             0x5000002, has entry point, Version5 EABI

tftp로 커널바이너리와 ramdisk 밀어넣기

REBIS# set ethaddr 12:34:56:65:43:21 MAC address
REBIS# set serverip 192.168.1.1 Host IP address
REBIS# set ipaddr 192.168.1.2 Target IP address
REBIS# t 30800000 ramdisk-8.gz ramdisk download
REBIS# t 32000000 zImage kernel download
REBIS# go 32000000 start
REBIS# nandw 0 200000 32000000 kernel Fusing
REBIS# nandw 100 340000 30800000 ramdisk Fusing
REBIS# set bootcmd nandr 0 200000 32000000\; nandr 100 340000 30800000\;g 32000000

• 고도리님 uboot분석 in kelp
• HowToPorting_uboot in asemlove
• u-boot armv4t eabi patch from openmoko

make uImage ARCH=arm CROSS_COMPILE=…

SEGMENT_SIZE 디파인 되어있지 않다고 에러 뿜을때

// NOSTDINC_FLAGS에 -Dlinux 추가...
NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) -Dlinux
CHECKFLAGS     += $(NOSTDINC_FLAGS) 

$ find ./ -name *.cmm
./Document/Emulator/TRACE32/flash/rebis_flash_atmel.cmm
./Document/Emulator/TRACE32/terminal.cmm
./Document/Emulator/TRACE32/rebis_init.cmm
./Document/Emulator/TRACE32/linux/start_linux.cmm
./Document/Emulator/TRACE32/linux/rebis_INIT.cmm
./Document/Emulator/TRACE32/win.cmm

• android source official site
• android developers
• android developers blog

실제 타켓에 포팅

• android articles in Benno's blog
• CNUAndroidMobicon in KLDP wiki
• AndroidPortingOnRealTarget in KLDP wiki
• yuihorie님의 linux&amdroid 관련 포스팅들

어플개발에 관한 참고 사이트들

• 커니의 안드로이드 이야기
• DroidDraw Beta ui 디자인 사이트

소스저장소

• android git official site?
• android/pub

플랫폼 다운로드

mkdir mydroid
cd mydroid
repo init -u git://android.git.kernel.org/platform/manifest.git
repo sync

• hello-world-c-program-on-using-android