# 20220331
## Cache Coherency
Jserv: TODO https://www.youtube.com/playlist?list=PLDoI-XvXO0aqgj_8Og51XoE7iyAu5yEWZ
### Hint from Jserv
mem hier
LLC public shared, L1 private individual
?snooping
?MOESI protocsl
up to 10k cpu cycle
Cortex A9 feature (extendsion) L2(LLC) lockdown
新版
A72 拿掉，但新版的又加回來，但是是新的更細緻的 Cache control
### CS61C
* 23.1
Amdahl’s law : paralizing Moore’s Law
https://en.wikipedia.org/wiki/Amdahl’s_law#:~:text=In computer architecture%2C Amdahl’s law,system whose resources are improved.
* 23.2
mat muti
cache scheme
phonebook design
cache block optimization
* 23.3
KML
Q: 如果沒有 L2 lockdown feature 怎麼辦?
A: KML
KML patch
## Qemu
- [x] build the latest version
#### stackoverflow: Emulating raspberry pi 4 with qemu
https://stackoverflow.com/questions/67045438/emulating-raspberry-pi-4-with-qemu
Q: Which machine? virt?
> 不需要模擬周邊，用 virt 即可
Q: Kernel or rpi4 image?
> Kernel 讓干擾因素變少，busybox/ buildroot
Pick the virt-6.1 up
There is no exact rpi4 emulator right now. Some WIP plz see the link
https://github.com/docdude/qemu_rpi4
https://gitlab.com/philmd/qemu/-/tree/raspi4_wip
https://github.com/0xMirasio/qemu-patch-raspberry4
we might choose generic one if rpi4 isn’t ready.
Q: What’s the impact on testing rpi4 kernel modifier on generic solution? Is there any trouble on porting to rpi4 machine or even Debian image?
follow up https://wiki.qemu.org/Documentation/Platforms/ARM
## Buidroot
```
git clone git://git.buildroot.net/buildroot
```
# 傻了 ... 直接用 defconfig
qemu_aarch64_virt_defconfig
把 CPU 改 a72
## Rpi 4
datasheet
https://datasheets.raspberrypi.com/rpi4/raspberry-pi-4-datasheet.pdf
CPU
Quad core 64-bit ARM-Cortex A72 running at 1.5GHz
```
qemu-system-aarch64 \
-M virt \
-cpu cortex-a72 \
-kernel Image \
-append "rootwait root=/dev/vda console=ttyAMA0" \
-nographic \
-smp 1 \
-netdev user,id=eth0 \
-device virtio-net-device,netdev=eth0 \
-device virtio-blk-device,drive=hd0 \
-drive file=rootfs.ext4,if=none,format=raw,id=hd0
```
Customize buildroot
Git diff
5.15 vs 對應的 patch 的
要確切
## KML
- [ ] Documentation/00-INDEX | 2 ++
- [ ] Documentation/kml.txt | 50+++++++++++++++++++++++++++++
- [ ] MAINTAINERS | 6 ++++
- [ ] Makefile | 2 +-
- [ ] arch/arm/Kconfig | 4 +++
- [ ] [arch/arm/include/asm/processor.h | 32 +++++++++++++++++++](https://github.com/sonicyang/KML/blob/master/0001-Integrate-KML.patch#L163)
> /home/yan/dev/linux-rpi/arch/arm64/include/asm/processor.h
```c=
static inline void start_thread_common(struct pt_regs *regs, unsigned long pc)
{
memset(regs, 0, sizeof(*regs));
forget_syscall(regs);
regs->pc = pc;
if (system_uses_irq_prio_masking())
regs->pmr_save = GIC_PRIO_IRQON;
}
static inline void start_thread(struct pt_regs *regs, unsigned long pc,
unsigned long sp)
{
start_thread_common(regs, pc);
regs->pstate = PSR_MODE_EL0t;
spectre_v4_enable_task_mitigation(current);
regs->sp = sp;
}
#ifdef CONFIG_COMPAT
static inline void compat_start_thread(struct pt_regs *regs, unsigned long pc,
unsigned long sp)
{
start_thread_common(regs, pc);
regs->pstate = PSR_AA32_MODE_USR;
if (pc & 1)
regs->pstate |= PSR_AA32_T_BIT;
#ifdef __AARCH64EB__
regs->pstate |= PSR_AA32_E_BIT;
#endif
spectre_v4_enable_task_mitigation(current);
regs->compat_sp = sp;
}
#endif
```
Q: 怎麼改要研究一下
- [ ] arch/arm/include/asm/ptrace.h | 11 +++++++
Q: ptrace?
> man page
- [ ] arch/arm/include/asm/thread_info.h | 16 ++++++++++
> /home/yan/dev/linux-rpi/arch/arm64/include/asm/thread_info.h
> 沒特別改變
- [ ] arch/arm/kernel/entry-armv.S | 16 ++++++++++
> /home/yan/dev/linux-rpi/arch/arm64/kernel/entry.S
Q: 比較不一樣，function 都不同 (搜 vector)
> -[ ] diff 把差異列出來
> /home/yan/dev/linux-rpi/arch/arm64/kernel/entry-common.c
>
- [ ] arch/arm/lib/uaccess_with_memcpy.c | 12 ++++++-
>檔案找不到 arch/arm/lib/uaccess_with_memcpy.c https://github.com/sonicyang/KML/blob/master/0001-Integrate-KML.patch#L344
> 4.14 kenernl
- [ ] arch/arm/vfp/vfphw.S | 13 ++++++++
- [ ] drivers/pnp/pnpbios/bioscalls.c | 4 +++
- [ ] fs/binfmt_elf.c | 64 ++++++++++++++++++++++++++++++++++++--
- [ ] fs/compat_binfmt_elf.c | 3 ++
- [ ] init/do_mounts.c | 8 +++++
- [ ] kernel/Kconfig.kml | 34 ++++++++++++++++++++
- [ ] kernel/tracepoint.c | 5 +++
- [ ] lib/iov_iter.c | 4 +++
- [ ] mm/memory.c | 4 +++
```c=
#if defined(CONFIG_PROVE_LOCKING) || defined(CONFIG_DEBUG_ATOMIC_SLEEP)
void __might_fault(const char *file, int line)
{
/*
* Some code (nfs/sunrpc) uses socket ops on kernel memory while
* holding the mmap_lock, this is safe because kernel memory doesn't
* get paged out, therefore we'll never actually fault, and the
* below annotations will generate false positives.
*/
if (uaccess_kernel())
return;
if (pagefault_disabled())
return;
__might_sleep(file, line, 0);
#if defined(CONFIG_DEBUG_ATOMIC_SLEEP)
if (current->mm)
might_lock_read(¤t->mm->mmap_lock);
#endif
}
EXPORT_SYMBOL(__might_fault);
#endif
```
Q: GDB 去跑，看 uaccess_kernel() 跑去哪邊就改哪邊
- [ ] security/tomoyo/network.c | 4 +++
/home/yan/dev/linux-rpi/arch/arm64/include/asm/thread_info.h
## vDSO
- [ ] arch/arm/include/asm/vdso_datapage.h | 18 +--
- [ ] arch/arm/kernel/vdso.c | 61 ++--------
- [ ] arch/arm/vdso/vdso.lds.S | 6 +
- [ ] [arch/arm/vdso/vgettimeofday.c | 215 +++++++++--------------------------](https://github.com/sonicyang/KML/blob/master/0002-Use-VDSO-as-the-wrapper-for-KML-resource.patch#L163)
```
/home/yan/dev/linux-rpi/arch/arm64/kernel/vdso
├── gen_vdso_offsets.sh
├── Makefile
├── note.S
├── sigreturn.S
├── vdso.lds.S
└── vgettimeofday.c
```
> arch/arm64/kernel/vdso vs arch/arm64/kernel/vdso32
- [ ] kernel/time/time.c | 1 -
- [ ] kernel/time/timekeeping.c | 1 -
wastedcore
```
$ make menuconfig
$ make -j8
* wastedcores
*
systemtap (BR2_PACKAGE_SYSTEMTAP) [Y/n/?] y
wastedcores (BR2_PACKAGE_WASTEDCORES) [Y/n/?] y
Target CPU count (BR2_PACKAGE_WASTEDCORES_NUM_CPU) [4] (NEW)
Max Entries (BR2_PACKAGE_WASTEDCORES_MAX_SAMPLE) [100000000] (NEW)
Enable Extra Profiling (BR2_PACKAGE_WASTEDCORES_EXTRA) [N/y/?] (NEW) y
mctest (BR2_PACKAGE_MCTEST) [N/y/?] (NEW) y
#
# configuration written to /home/yan/dev/rt-experiments/buildroot/.config
#
```
```
#x86 version
#make -j8
/home/yan/dev/rt-experiments/buildroot/output/host/usr/bin/ccache /usr/bin/gcc -I. -I/home/yan/dev/rt-experiments/buildroot/output/host/usr/include -O2 -I/home/yan/dev/rt-experiments/buildroot/output/host/usr/include -c -o freadahead.o freadahead.c
/home/yan/dev/rt-experiments/buildroot/output/host/usr/bin/ccache /usr/bin/gcc -I. -I/home/yan/dev/rt-experiments/buildroot/output/host/usr/include -O2 -I/home/yan/dev/rt-experiments/buildroot/output/host/usr/include -c -o fseek.o fseek.c
/home/yan/dev/rt-experiments/buildroot/output/host/usr/bin/ccache /usr/bin/gcc -I. -I/home/yan/dev/rt-experiments/buildroot/output/host/usr/include -O2 -I/home/yan/dev/rt-experiments/buildroot/output/host/usr/include -c -o fseeko.o fseeko.c
/home/yan/dev/rt-experiments/buildroot/output/host/usr/bin/ccache /usr/bin/gcc -I. -I/home/yan/dev/rt-experiments/buildroot/output/host/usr/include -O2 -I/home/yan/dev/rt-experiments/buildroot/output/host/usr/include -c -o isnanl.o isnanl.c
freadahead.c: In function 'freadahead':
freadahead.c:91:3: error: #error "Please port gnulib freadahead.c to your platform! Look at the definition of fflush, fread, ungetc on your system, then report this to bug-gnulib."
91 | #error "Please port gnulib freadahead.c to your platform! Look at the definition of fflush, fread, ungetc on your system, then report this to bug-gnulib."
| ^~~~~
make[5]: *** [Makefile:1842: freadahead.o] Error 1
make[5]: *** Waiting for unfinished jobs....
fseeko.c: In function 'rpl_fseeko':
fseeko.c:109:4: error: #error "Please port gnulib fseeko.c to your platform! Look at the code in fseeko.c, then report this to bug-gnulib."
109 | #error "Please port gnulib fseeko.c to your platform! Look at the code in fseeko.c, then report this to bug-gnulib."
| ^~~~~
make[5]: *** [Makefile:1842: fseeko.o] Error 1
make[4]: *** [Makefile:1602: all] Error 2
make[3]: *** [Makefile:1506: all-recursive] Error 1
make[2]: *** [Makefile:1461: all] Error 2
make[1]: *** [package/pkg-generic.mk:219: /home/yan/dev/rt-experiments/buildroot/output/build/host-m4-1.4.17/.stamp_built] Error 2
make: *** [Makefile:76: _all] Error 2
```
```
lib/fseterr.c: In function 'fseterr':
lib/fseterr.c:77:3: error: #error "Please port gnulib fseterr.c to your platform! Look at the definitions of ferror and clearerr on your system, then report this to bug-gnulib."
77 | #error "Please port gnulib fseterr.c to your platform! Look at the definitions of ferror and clearerr on your system, then report this to bug-gnulib."
| ^~~~~
make[4]: *** [Makefile:3466: lib/fseterr.o] Error 1
make[4]: *** Waiting for unfinished jobs....
make[3]: *** [Makefile:4522: all-recursive] Error 1
make[2]: *** [Makefile:2625: all] Error 2
make[1]: *** [package/pkg-generic.mk:219: /home/yan/dev/rt-experiments/buildroot/output/build/host-bison-3.0.4/.stamp_built] Error 2
make: *** [Makefile:76: _all] Error 2
```
```
yan@am-002b67307289:~/dev/rt-experiments/buildroot/output/build/host-bison-3.0.4$ wget https://github.com/easybuilders/easybuild-easyconfigs/files/3307749/Bison-3.0.4_glibc_2.28.patch.zip
--2022-04-12 04:45:55-- https://github.com/easybuilders/easybuild-easyconfigs/files/3307749/Bison-3.0.4_glibc_2.28.patch.zip
Resolving github.com (github.com)... 52.69.186.44
Connecting to github.com (github.com)|52.69.186.44|:443... connected.
HTTP request sent, awaiting response... 302 Found
Location: https://objects.githubusercontent.com/github-production-repository-file-5c1aeb/6228403/3307749?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=AKIAIWNJYAX4CSVEH53A%2F20220411%2Fus-east-1%2Fs3%2Faws4_request&X-Amz-Date=20220411T204556Z&X-Amz-Expires=300&X-Amz-Signature=d90556344d893d85f0be39097c896006029ac8d44d07299587f375d4eae6a3da&X-Amz-SignedHeaders=host&actor_id=0&key_id=0&repo_id=6228403&response-content-disposition=attachment%3Bfilename%3DBison-3.0.4_glibc_2.28.patch.zip&response-content-type=application%2Fzip [following]
--2022-04-12 04:45:56-- https://objects.githubusercontent.com/github-production-repository-file-5c1aeb/6228403/3307749?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=AKIAIWNJYAX4CSVEH53A%2F20220411%2Fus-east-1%2Fs3%2Faws4_request&X-Amz-Date=20220411T204556Z&X-Amz-Expires=300&X-Amz-Signature=d90556344d893d85f0be39097c896006029ac8d44d07299587f375d4eae6a3da&X-Amz-SignedHeaders=host&actor_id=0&key_id=0&repo_id=6228403&response-content-disposition=attachment%3Bfilename%3DBison-3.0.4_glibc_2.28.patch.zip&response-content-type=application%2Fzip
Resolving objects.githubusercontent.com (objects.githubusercontent.com)... 185.199.111.133, 185.199.110.133, 185.199.109.133, ...
Connecting to objects.githubusercontent.com (objects.githubusercontent.com)|185.199.111.133|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 902 [application/zip]
Saving to: ‘Bison-3.0.4_glibc_2.28.patch.zip’
Bison-3.0.4_glibc_2.28.patch 100%[============================================>] 902 --.-KB/s in 0s
2022-04-12 04:45:58 (31.9 MB/s) - ‘Bison-3.0.4_glibc_2.28.patch.zip’ saved [902/902]
yan@am-002b67307289:~/dev/rt-experiments/buildroot/output/build/host-bison-3.0.4$ unzip
Bison-3.0.4_glibc_2.28.patch.zip etc/ runtime-po/
build-aux/ examples/ src/
data/ lib/ tests/
djgpp/ m4/
doc/ po/
yan@am-002b67307289:~/dev/rt-experiments/buildroot/output/build/host-bison-3.0.4$ unzip Bison-3.0.4_glibc_2.28.patch.zip
Archive: Bison-3.0.4_glibc_2.28.patch.zip
inflating: Bison-3.0.4_glibc_2.28.patch
yan@am-002b67307289:~/dev/rt-experiments/buildroot/output/build/host-bison-3.0.4$ ls
ABOUT-NLS ChangeLog COPYING INSTALL Makefile.am README-release
aclocal.m4 ChangeLog-1998 data javacomp.sh Makefile.in runtime-po
AUTHORS ChangeLog-2012 djgpp javaexec.sh NEWS src
Bison-3.0.4_glibc_2.28.patch config.log doc lib PACKAGING tests
Bison-3.0.4_glibc_2.28.patch.zip config.status etc m4 po THANKS
build-aux configure examples maint.mk README TODO
cfg.mk configure.ac GNUmakefile Makefile README-alpha
yan@am-002b67307289:~/dev/rt-experiments/buildroot/output/build/host-bison-3.0.4$ git apply --check Bison-3.0.4_glibc_2.28.patch -v
Checking patch output/build/host-bison-3.0.4/lib/fseterr.c...
Checking patch output/build/host-bison-3.0.4/lib/stdio-impl.h...
yan@am-002b67307289:~/dev/rt-experiments/buildroot/output/build/host-bison-3.0.4$ git apply Bison-3.0.4_glibc_2.28.patch -v
Checking patch output/build/host-bison-3.0.4/lib/fseterr.c...
Checking patch output/build/host-bison-3.0.4/lib/stdio-impl.h...
Applied patch output/build/host-bison-3.0.4/lib/fseterr.c cleanly.
Applied patch output/build/host-bison-3.0.4/lib/stdio-impl.h cleanly.
```
> m4 的漏洞，照這個改 https://github.com/easybuilders/easybuild-easyconfigs/issues/8501
> 裏頭有個 patch
```
yan@am-002b67307289:~/dev/rt-experiments/buildroot$ make
>>> linux-headers custom Downloading
cp: cannot stat '/home/yan/dev/rt-experiments/buildroot/../linux.tar': No such file or directory
--2022-04-12 04:15:48-- http://sources.buildroot.net/linux.tar
Resolving sources.buildroot.net (sources.buildroot.net)... 2606:4700:20::ac43:4838, 2606:4700:20::681a:25, 2606:4700:20::681a:125, ...
Connecting to sources.buildroot.net (sources.buildroot.net)|2606:4700:20::ac43:4838|:80... connected.
HTTP request sent, awaiting response... 404 Not Found
2022-04-12 04:15:48 ERROR 404: Not Found.
make[1]: *** [package/pkg-generic.mk:130: /home/yan/dev/rt-experiments/buildroot/output/build/linux-headers-custom/.stamp_downloaded] Error 1
make: *** [Makefile:76: _all] Error 2
# 要在上一個目錄
wget https://www.kernel.org/pub/linux/kernel/v4.x/linux-4.4.12.tar.xz
```
```
yan@am-002b67307289:~/dev/rt-experiments/buildroot$ make
>>> host-e2fsprogs 1.43.3 Building
PATH="/home/yan/dev/rt-experiments/buildroot/output/host/bin:/home/yan/dev/rt-experiments/buildroot/output/host/sbin:/home/yan/dev/rt-experiments/buildroot/output/host/usr/bin:/home/yan/dev/rt-experiments/buildroot/output/host/usr/sbin:/usr/local/bin:/usr/bin:/bin:/usr/local/games:/usr/games:/snap/bin" PKG_CONFIG="/home/yan/dev/rt-experiments/buildroot/output/host/usr/bin/pkg-config" PKG_CONFIG_SYSROOT_DIR="/" PKG_CONFIG_ALLOW_SYSTEM_CFLAGS=1 PKG_CONFIG_ALLOW_SYSTEM_LIBS=1 PKG_CONFIG_LIBDIR="/home/yan/dev/rt-experiments/buildroot/output/host/usr/lib/pkgconfig:/home/yan/dev/rt-experiments/buildroot/output/host/usr/share/pkgconfig" /usr/bin/make -j9 -C /home/yan/dev/rt-experiments/buildroot/output/build/host-e2fsprogs-1.43.3/
make[3]: 'util/subst.conf' is up to date.
make[3]: 'lib/config.h' is up to date.
make[3]: 'lib/dirpaths.h' is up to date.
make[3]: 'lib/ext2fs/ext2_types.h' is up to date.
make[3]: 'lib/blkid/blkid_types.h' is up to date.
make[3]: 'lib/uuid/uuid_types.h' is up to date.
make[3]: 'compile_et' is up to date.
make[3]: 'ext2_err.h' is up to date.
make[3]: 'prof_err.h' is up to date.
/usr/bin/make libs
make[4]: 'util/subst.conf' is up to date.
make[4]: 'lib/config.h' is up to date.
make[4]: 'lib/dirpaths.h' is up to date.
make[4]: 'lib/ext2fs/ext2_types.h' is up to date.
make[4]: 'lib/blkid/blkid_types.h' is up to date.
make[4]: 'lib/uuid/uuid_types.h' is up to date.
make[4]: 'compile_et' is up to date.
make[4]: 'ext2_err.h' is up to date.
make[4]: 'prof_err.h' is up to date.
making all in lib/et
make[4]: Nothing to be done for 'all'.
making all in lib/ss
make[4]: Nothing to be done for 'all'.
making all in lib/e2p
make[4]: Nothing to be done for 'all'.
making all in lib/uuid
make[4]: Nothing to be done for 'all'.
making all in lib/blkid
make[4]: Nothing to be done for 'all'.
making all in lib/support
make[4]: Nothing to be done for 'all'.
making all in lib/ext2fs
make[4]: Nothing to be done for 'all'.
making all in intl
make[4]: Nothing to be done for 'all'.
/usr/bin/make progs
make[4]: 'util/subst.conf' is up to date.
make[4]: 'lib/config.h' is up to date.
make[4]: 'lib/dirpaths.h' is up to date.
make[4]: 'lib/ext2fs/ext2_types.h' is up to date.
make[4]: 'lib/blkid/blkid_types.h' is up to date.
make[4]: 'lib/uuid/uuid_types.h' is up to date.
make[4]: 'compile_et' is up to date.
make[4]: 'ext2_err.h' is up to date.
make[4]: 'prof_err.h' is up to date.
making all in lib/et
make[4]: Nothing to be done for 'all'.
making all in lib/ss
make[4]: Nothing to be done for 'all'.
making all in lib/e2p
make[4]: Nothing to be done for 'all'.
making all in lib/uuid
make[4]: Nothing to be done for 'all'.
making all in lib/blkid
make[4]: Nothing to be done for 'all'.
making all in lib/support
make[4]: Nothing to be done for 'all'.
making all in lib/ext2fs
make[4]: Nothing to be done for 'all'.
making all in intl
make[4]: Nothing to be done for 'all'.
making all in e2fsck
LD e2fsck
/usr/bin/ld: ../lib/libext2fs.a(ismounted.o): in function `check_mntent_file':
ismounted.c:(.text+0x21d): undefined reference to `major'
/usr/bin/ld: ../lib/libblkid.a(devname.o): in function `probe_all':
devname.c:(.text+0x7d8): undefined reference to `makedev'
/usr/bin/ld: devname.c:(.text+0xabd): undefined reference to `makedev'
/usr/bin/ld: devname.c:(.text+0xb8b): undefined reference to `makedev'
collect2: error: ld returned 1 exit status
make[4]: *** [Makefile:426: e2fsck] Error 1
make[3]: *** [Makefile:405: all-progs-recursive] Error 1
make[2]: *** [Makefile:341: all] Error 2
make[1]: *** [package/pkg-generic.mk:219: /home/yan/dev/rt-experiments/buildroot/output/build/host-e2fsprogs-1.43.3/.stamp_built] Error 2
make: *** [Makefile:76: _all] Error 2
yan@am-002b67307289:~/dev/rt-experiments/buildroot$ make menuconfig
*** End of the configuration.
*** Execute 'make' to start the build or try 'make help'.
yan@am-002b67307289:~/dev/rt-experiments/buildroot$ make menuconfig
*** End of the configuration.
*** Execute 'make' to start the build or try 'make help'.
yan@am-002b67307289:~/dev/rt-experiments/buildroot$ ls
arch board configs fs output toolchain
ARM-A9-buildroot-config boot COPYING kconfig package vmalloc-384M.patch
ARM-A9-kernel-config CHANGES DEVELOPERS linux README x86_64-buildroot-config
ARM-A9-KML-buildroot-config Config.in dl Makefile support x86_64-kernel-config
ARM-A9-KML-kernel-config Config.in.legacy docs Makefile.legacy system
yan@am-002b67307289:~/dev/rt-experiments/buildroot$ vim package/
Display all 1716 possibilities? (y or n)
4th/ libart/ perl-netaddr-ip/
a10disp/ libasplib/ perl-net-dns/
acl/ libass/ perl-net-http/
acpica/ libassuan/ perl-net-ssleay/
acpid/ libatasmart/ perl-path-tiny/
acpitool/ libatomic_ops/ perl-timedate/
acsccid/ libbdplus/ perl-time-hires/
adwaita-icon-theme/ libbluray/ perl-try-tiny/
aer-inject/ libbroadvoice/ perl-uri/
aespipe/ libbsd/ perl-www-robotrules/
agentpp/ libcap/ perl-xml-libxml/
aiccu/ libcap-ng/ perl-xml-namespacesupport/
aircrack-ng/ libcdaudio/ perl-xml-sax/
alljoyn/ libcddb/ perl-xml-sax-base/
alljoyn-base/ libcdio/ phidgetwebservice/
alljoyn-tcl/ libcec/ php/
alljoyn-tcl-base/ libcgi/ php-amqp/
alsa-lib/ libcgicc/ php-geoip/
alsamixergui/ libcgroup/ php-gnupg/
alsa-utils/ libcli/ php-imagick/
am335x-pru-package/ libcoap/ php-memcached/
am33x-cm3/ libcodec2/ php-ssh2/
amd-catalyst/ libcofi/ php-yaml/
android-tools/ libconfig/ php-zmq/
angularjs/ libconfuse/ picocom/
apache/ libcroco/ pifmrds/
apitrace/ libcrossguid/ pinentry/
yan@am-002b67307289:~/dev/rt-experiments/buildroot$ vim package/elf
elf2flt/ elftosb/ elfutils/
yan@am-002b67307289:~/dev/rt-experiments/buildroot$ vim package/e2
e2fsprogs/ e2tools/
yan@am-002b67307289:~/dev/rt-experiments/buildroot$ vim package/e2
e2fsprogs/ e2tools/
yan@am-002b67307289:~/dev/rt-experiments/buildroot$ vim package/e2fsprogs/
0001-sem-init-libs.patch Config.in.host
0002-MCONFIG.in-handle-CLOCK_GETTIME_LIB.patch e2fsprogs.hash
Config.in e2fsprogs.mk
yan@am-002b67307289:~/dev/rt-experiments/buildroot$ vim package/e2fsprogs/e2fsprogs.mk
yan@am-002b67307289:~/dev/rt-experiments/buildroot$ git apply --check Bison-3.0.4_glibc_2.28.patch -v^C
yan@am-002b67307289:~/dev/rt-experiments/buildroot$ rm -rf ^C
yan@am-002b67307289:~/dev/rt-experiments/buildroot$ rm -rf /home/yan/dev/rt-experiments/buildroot/output/build/host-e2fsprogs-1.43.3
yan@am-002b67307289:~/dev/rt-experiments/buildroot$ make -j8
>>> host-e2fsprogs 1.43.5 Downloading
--2022-04-12 05:03:23-- https://cdn.kernel.org/pub/linux/kernel/people/tytso/e2fsprogs/v1.43.5/e2fsprogs-1.43.5.tar.xz
Resolving cdn.kernel.org (cdn.kernel.org)... 2a04:4e42:48::432, 199.232.45.176
Connecting to cdn.kernel.org (cdn.kernel.org)|2a04:4e42:48::432|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 5301436 (5.1M) [application/x-xz]
Saving to: ‘/home/yan/dev/rt-experiments/buildroot/output/build/.e2fsprogs-1.43.5.tar.xz.wqYVwO/output’
/home/yan/dev/rt-experiments 100%[============================================>] 5.06M 7.94MB/s in 0.6s
2022-04-12 05:03:25 (7.94 MB/s) - ‘/home/yan/dev/rt-experiments/buildroot/output/build/.e2fsprogs-1.43.5.tar.xz.wqYVwO/output’ saved [5301436/5301436]
ERROR: No hash found for e2fsprogs-1.43.5.tar.xz
--2022-04-12 05:03:25-- http://sources.buildroot.net/e2fsprogs-1.43.5.tar.xz
Resolving sources.buildroot.net (sources.buildroot.net)... 2606:4700:20::ac43:4838, 2606:4700:20::681a:25, 2606:4700:20::681a:125, ...
Connecting to sources.buildroot.net (sources.buildroot.net)|2606:4700:20::ac43:4838|:80... connected.
HTTP request sent, awaiting response... 404 Not Found
2022-04-12 05:03:25 ERROR 404: Not Found.
make[1]: *** [package/pkg-generic.mk:130: /home/yan/dev/rt-experiments/buildroot/output/build/host-e2fsprogs-1.43.5/.stamp_downloaded] Error 1
make: *** [Makefile:76: _all] Error 2
yan@am-002b67307289:~/dev/rt-experiments/buildroot$ vim package/e2fsprogs/
0001-sem-init-libs.patch Config.in.host
0002-MCONFIG.in-handle-CLOCK_GETTIME_LIB.patch e2fsprogs.hash
Config.in e2fsprogs.mk
yan@am-002b67307289:~/dev/rt-experiments/buildroot$ vim package/e2fsprogs/e2fsprogs.hash
yan@am-002b67307289:~/dev/rt-experiments/buildroot$ cat package/e2fsprogs/e2fsprogs.hash
# From https://www.kernel.org/pub/linux/kernel/people/tytso/e2fsprogs/v1.43.3/sha256sums.asc
sha256 744ca4e9a8e6c943601b2744d1ae658e5f37d35b5ea5b1dea86985320bd87f37 e2fsprogs-1.43.3.tar.xz
yan@am-002b67307289:~/dev/rt-experiments/buildroot$ cat package/e2fsprogs/e2fsprogs.hash
# From https://www.kernel.org/pub/linux/kernel/people/tytso/e2fsprogs/v1.43.3/sha256sums.asc
sha256 744ca4e9a8e6c943601b2744d1ae658e5f37d35b5ea5b1dea86985320bd87f37 e2fsprogs-1.43.3.tar.xz
yan@am-002b67307289:~/dev/rt-experiments/buildroot$ vim package/e2fsprogs/e2fsprogs.hash
yan@am-002b67307289:~/dev/rt-experiments/buildroot$ ls
arch board configs fs output toolchain
ARM-A9-buildroot-config boot COPYING kconfig package vmalloc-384M.patch
ARM-A9-kernel-config CHANGES DEVELOPERS linux README x86_64-buildroot-config
ARM-A9-KML-buildroot-config Config.in dl Makefile support x86_64-kernel-config
ARM-A9-KML-kernel-config Config.in.legacy docs Makefile.legacy system
yan@am-002b67307289:~/dev/rt-experiments/buildroot$ make -j8
>>> host-e2fsprogs 1.43.5 Downloading
--2022-04-12 05:07:36-- https://cdn.kernel.org/pub/linux/kernel/people/tytso/e2fsprogs/v1.43.5/e2fsprogs-1.43.5.tar.xz
Resolving cdn.kernel.org (cdn.kernel.org)... 2a04:4e42:48::432, 199.232.45.176
Connecting to cdn.kernel.org (cdn.kernel.org)|2a04:4e42:48::432|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 5301436 (5.1M) [application/x-xz]
Saving to: ‘/home/yan/dev/rt-experiments/buildroot/output/build/.e2fsprogs-1.43.5.tar.xz.KW4zez/output’
/home/yan/dev/rt-experiments 100%[============================================>] 5.06M 7.98MB/s in 0.6s
2022-04-12 05:07:38 (7.98 MB/s) - ‘/home/yan/dev/rt-experiments/buildroot/output/build/.e2fsprogs-1.43.5.tar.xz.KW4zez/output’ saved [5301436/5301436]
e2fsprogs-1.43.5.tar.xz: OK (sha256: 261f3d9ade383fbf032a19140c9c25e998cc0f71a1ae686614fb3ae0eb955a17)
>>> host-e2fsprogs 1.43.5 Extracting
xzcat /home/yan/dev/rt-experiments/buildroot/dl/e2fsprogs-1.43.5.tar.xz | tar --strip-components=1 -C /home/yan/dev/rt-experiments/buildroot/output/build/host-e2fsprogs-1.43.5 -xf -
>>> host-e2fsprogs 1.43.5 Patching
Applying 0001-sem-init-libs.patch using patch:
patching file MCONFIG.in
Hunk #1 succeeded at 115 (offset 30 lines).
Applying 0002-MCONFIG.in-handle-CLOCK_GETTIME_LIB.patch using patch:
patching file MCONFIG.in
>>> host-e2fsprogs 1.43.5 Updating config.sub and config.guess
for file in config.guess config.sub; do for i in $(find /home/yan/dev/rt-experiments/buildroot/output/build/host-e2fsprogs-1.43.5 -name $file); do cp support/gnuconfig/$file $i; done; done
>>> host-e2fsprogs 1.43.5 Patching libtool
>>> host-e2fsprogs 1.43.5 Configuring
(cd /home/yan/dev/rt-experiments/buildroot/output/build/host-e2fsprogs-1.43.5/ && rm -rf config.cache; PATH="/home/yan/dev/rt-experiments/buildroot/output/host/bin:/home/yan/dev/rt-experiments/buildroot/output/host/sbin:/home/yan/dev/rt-experiments/buildroot/output/host/usr/bin:/home/yan/dev/rt-experiments/buildroot/output/host/usr/sbin:/usr/local/bin:/usr/bin:/bin:/usr/local/games:/usr/games:/snap/bin" PKG_CONFIG="/home/yan/dev/rt-experiments/buildroot/output/host/usr/bin/pkg-config" PKG_CONFIG_SYSROOT_DIR="/" PKG_CONFIG_ALLOW_SYSTEM_CFLAGS=1 PKG_CONFIG_ALLOW_SYSTEM_LIBS=1 PKG_CONFIG_LIBDIR="/home/yan/dev/rt-experiments/buildroot/output/host/usr/lib/pkgconfig:/home/yan/dev/rt-experiments/buildroot/output/host/usr/share/pkgconfig" AR="/usr/bin/ar" AS="/usr/bin/as" LD="/usr/bin/ld" NM="/usr/bin/nm" CC="/usr/bin/gcc" GCC="/usr/bin/gcc" CXX="/usr/bin/g++" CPP="/usr/bin/cpp" OBJCOPY="/usr/bin/objcopy" RANLIB="/usr/bin/ranlib" CPPFLAGS="-I/home/yan/dev/rt-experiments/buildroot/output/host/usr/include" CFLAGS="-O2 -I/home/yan/dev/rt-experiments/buildroot/output/host/usr/include" CXXFLAGS="-O2 -I/home/yan/dev/rt-experiments/buildroot/output/host/usr/include" LDFLAGS="-L/home/yan/dev/rt-experiments/buildroot/output/host/lib -L/home/yan/dev/rt-experiments/buildroot/output/host/usr/lib -Wl,-rpath,/home/yan/dev/rt-experiments/buildroot/output/host/usr/lib" INTLTOOL_PERL=/usr/bin/perl CFLAGS="-O2 -I/home/yan/dev/rt-experiments/buildroot/output/host/usr/include" LDFLAGS="-L/home/yan/dev/rt-experiments/buildroot/output/host/lib -L/home/yan/dev/rt-experiments/buildroot/output/host/usr/lib -Wl,-rpath,/home/yan/dev/rt-experiments/buildroot/output/host/usr/lib" ac_cv_header_magic_h=no ac_cv_lib_magic_magic_file=no CONFIG_SITE=/dev/null ./configure --prefix="/home/yan/dev/rt-experiments/buildroot/output/host/usr" --sysconfdir="/home/yan/dev/rt-experiments/buildroot/output/host/etc" --localstatedir="/home/yan/dev/rt-experiments/buildroot/output/host/var" --enable-shared --disable-static --disable-gtk-doc --disable-gtk-doc-html --disable-doc --disable-docs --disable-documentation --disable-debug --with-xmlto=no --with-fop=no --disable-dependency-tracking --disable-defrag --disable-fuse2fs )
configure: WARNING: unrecognized options: --enable-shared, --disable-static, --disable-gtk-doc, --disable-gtk-doc-html, --disable-doc, --disable-docs, --disable-documentation, --disable-debug, --with-xmlto, --with-fop, --disable-dependency-tracking
Generating configuration file for e2fsprogs version 1.43.5
```
> 參考 https://patchwork.ozlabs.org/project/buildroot/patch/20170810124536.26344-1-daggs@gmx.com/
```
yan@am-002b67307289:~/dev/rt-experiments/buildroot$ make
>>> linux 4.4.12 Building
PATH="/home/yan/dev/rt-experiments/buildroot/output/host/bin:/home/yan/dev/rt-experiments/buildroot/output/host/sbin:/home/yan/dev/rt-experiments/buildroot/output/host/usr/bin:/home/yan/dev/rt-experiments/buildroot/output/host/usr/sbin:/usr/local/bin:/usr/bin:/bin:/usr/local/games:/usr/games:/snap/bin" BR_BINARIES_DIR=/home/yan/dev/rt-experiments/buildroot/output/images /usr/bin/make -j9 HOSTCC="/usr/bin/gcc" HOSTCFLAGS="" ARCH=arm INSTALL_MOD_PATH=/home/yan/dev/rt-experiments/buildroot/output/target CROSS_COMPILE="/home/yan/dev/rt-experiments/buildroot/output/host/usr/bin/arm-buildroot-linux-gnueabihf-" DEPMOD=/home/yan/dev/rt-experiments/buildroot/output/host/sbin/depmod INSTALL_MOD_STRIP=1 -C /home/yan/dev/rt-experiments/buildroot/output/build/linux-4.4.12 zImage
CHK include/config/kernel.release
CHK include/generated/uapi/linux/version.h
CHK include/generated/utsrelease.h
CC scripts/mod/empty.o
make[3]: 'include/generated/mach-types.h' is up to date.
CC scripts/mod/devicetable-offsets.s
HOSTLD scripts/dtc/dtc
/usr/bin/ld: scripts/dtc/dtc-parser.tab.o:(.bss+0x40): multiple definition of `yylloc'; scripts/dtc/dtc-lexer.lex.o:(.bss+0x30): first defined here
CHK include/generated/timeconst.h
CC kernel/bounds.s
MKELF scripts/mod/elfconfig.h
HOSTCC scripts/mod/modpost.o
HOSTCC scripts/mod/sumversion.o
collect2: error: ld returned 1 exit status
make[4]: *** [scripts/Makefile.host:100: scripts/dtc/dtc] Error 1
make[3]: *** [scripts/Makefile.build:403: scripts/dtc] Error 2
make[3]: *** Waiting for unfinished jobs....
GEN scripts/mod/devicetable-offsets.h
HOSTCC scripts/mod/file2alias.o
CHK include/generated/bounds.h
CC arch/arm/kernel/asm-offsets.s
HOSTLD scripts/mod/modpost
make[2]: *** [Makefile:545: scripts] Error 2
make[2]: *** Waiting for unfinished jobs....
CHK include/generated/asm-offsets.h
CALL scripts/checksyscalls.sh
make[1]: *** [package/pkg-generic.mk:219: /home/yan/dev/rt-experiments/buildroot/output/build/linux-4.4.12/.stamp_built] Error 2
make: *** [Makefile:76: _all] Error 2
```
> follow https://fw64.net/solution-for-multiple-definition-of-yylloc-error
```
yan@am-002b67307289:~/dev/rt-experiments/buildroot$ make
>>> mctest master Downloading
Doing shallow clone
Cloning into 'mctest-master'...
git@github.com: Permission denied (publickey).
fatal: Could not read from remote repository.
Please make sure you have the correct access rights
and the repository exists.
Shallow clone failed, falling back to doing a full clone
Doing full clone
Cloning into 'mctest-master'...
git@github.com: Permission denied (publickey).
fatal: Could not read from remote repository.
Please make sure you have the correct access rights
and the repository exists.
--2022-04-13 16:56:38-- http://sources.buildroot.net/mctest-master.tar.gz
Resolving sources.buildroot.net (sources.buildroot.net)... 2606:4700:20::681a:25, 2606:4700:20::681a:125, 2606:4700:20::ac43:4838, ...
Connecting to sources.buildroot.net (sources.buildroot.net)|2606:4700:20::681a:25|:80... connected.
HTTP request sent, awaiting response... 404 Not Found
2022-04-13 16:56:39 ERROR 404: Not Found.
make[1]: *** [package/pkg-generic.mk:130: /home/yan/dev/rt-experiments/buildroot/output/build/mctest-master/.stamp_downloaded] Error 1
make: *** [Makefile:76: _all] Error 2
```
解法
```
yan@am-002b67307289:~/dev/rt-experiments/buildroot$ vim package/mctest/mctest.mk
#MCTEST_VERSION = master
#MCTEST_SITE = git@github.com:sonicyang/mctest.git
#MCTEST_SITE_METHOD = git
MCTEST_VERSION=master
MCTEST_SOURCE=mctest-$(MCTEST_VERSION).tar.gz
MCTEST_SITE = http://github.com/sonicyang/mctest/tarball/$(MCTEST_VERSION)
```
```
yan@am-002b67307289:~/dev/rt-experiments/buildroot$ make
>>> uboot socfpga_v2013.01.01 Downloading
Doing full clone
Cloning into 'uboot-socfpga_v2013.01.01'...
remote: Enumerating objects: 841937, done.
remote: Counting objects: 100% (39987/39987), done.
remote: Compressing objects: 100% (9695/9695), done.
remote: Total 841937 (delta 30933), reused 35109 (delta 29923), pack-reused 801950
Receiving objects: 100% (841937/841937), 200.22 MiB | 11.76 MiB/s, done.
Resolving deltas: 100% (690657/690657), done.
Updating files: 100% (17838/17838), done.
Could not fetch special ref 'socfpga_v2013.01.01'; assuming it is not special.
error: pathspec 'socfpga_v2013.01.01' did not match any file(s) known to git
--2022-04-14 11:57:57-- http://sources.buildroot.net/uboot-socfpga_v2013.01.01.tar.gz
Resolving sources.buildroot.net (sources.buildroot.net)... 2606:4700:20::ac43:4838, 2606:4700:20::681a:125, 2606:4700:20::681a:25, ...
Connecting to sources.buildroot.net (sources.buildroot.net)|2606:4700:20::ac43:4838|:80... connected.
HTTP request sent, awaiting response... 404 Not Found
2022-04-14 11:57:58 ERROR 404: Not Found.
make[1]: *** [package/pkg-generic.mk:130: /home/yan/dev/rt-experiments/buildroot/output/build/uboot-socfpga_v2013.01.01/.stamp_downloaded] Error 1
make: *** [Makefile:76: _all] Error 2
```
這樣部會動，要改成這樣，這是一個 backport
```
yan@am-002b67307289:~/dev/rt-experiments/buildroot$ make
In file included from /home/yan/dev/rt-experiments/buildroot/output/build/uboot-rel_socfpga_v2013.01.01_20.07.02_rc1/include/image.h:56,
from fit_image.c:31:
/usr/include/libfdt.h:1818:19: error: redefinition of ‘fdt_appendprop_u32’
1818 | static inline int fdt_appendprop_u32(void *fdt, int nodeoffset,
| ^~~~~~~~~~~~~~~~~~
In file included from fdt_host.h:25,
from mkimage.h:35,
from fit_image.c:30:
../include/libfdt.h:1296:19: note: previous definition of ‘fdt_appendprop_u32’ was here
1296 | static inline int fdt_appendprop_u32(void *fdt, int nodeoffset,
| ^~~~~~~~~~~~~~~~~~
In file included from /home/yan/dev/rt-experiments/buildroot/output/build/uboot-rel_socfpga_v2013.01.01_20.07.02_rc1/include/image.h:56,
from fit_image.c:31:
/usr/include/libfdt.h:1853:19: error: redefinition of ‘fdt_appendprop_u64’
1853 | static inline int fdt_appendprop_u64(void *fdt, int nodeoffset,
| ^~~~~~~~~~~~~~~~~~
In file included from fdt_host.h:25,
from mkimage.h:35,
from fit_image.c:30:
../include/libfdt.h:1331:19: note: previous definition of ‘fdt_appendprop_u64’ was here
1331 | static inline int fdt_appendprop_u64(void *fdt, int nodeoffset,
| ^~~~~~~~~~~~~~~~~~
In file included from /home/yan/dev/rt-experiments/buildroot/output/build/uboot-rel_socfpga_v2013.01.01_20.07.02_rc1/include/image.h:56,
from fit_image.c:31:
/usr/include/libfdt.h:1865:19: error: redefinition of ‘fdt_appendprop_cell’
1865 | static inline int fdt_appendprop_cell(void *fdt, int nodeoffset,
| ^~~~~~~~~~~~~~~~~~~
In file included from fdt_host.h:25,
from mkimage.h:35,
from fit_image.c:30:
../include/libfdt.h:1343:19: note: previous definition of ‘fdt_appendprop_cell’ was here
1343 | static inline int fdt_appendprop_cell(void *fdt, int nodeoffset,
| ^~~~~~~~~~~~~~~~~~~
make[3]: *** [/home/yan/dev/rt-experiments/buildroot/output/build/uboot-rel_socfpga_v2013.01.01_20.07.02_rc1/rules.mk:66: fit_image.o] Error 1
make[2]: *** [Makefile:590: tools] Error 2
make[1]: *** [package/pkg-generic.mk:219: /home/yan/dev/rt-experiments/buildroot/output/build/uboot-rel_socfpga_v2013.01.01_20.07.02_rc1/.stamp_built] Error 2
make: *** [Makefile:76: _all] Error 2
```
解法
```
yan@am-002b67307289:~/dev/rt-experiments/buildroot$ sudo apt-get purge -y --auto-remove libfdt-dev
```
Wastecore
wastedcore seem not worth time to deep into. Check the [thread](https://lkml.org/lkml/2016/4/23/135) on Linux Mailing List (Brend) & the [experiment](https://gist.github.com/brendangregg/588b1d29bcb952141d50ccc0e005fcf8) from him
I quote:
```
Summary: no significant difference seen in these tests.
```
20220415
轉向 buildroot arm_qemu_deconfig
buildroot 先走到 2022.02.x
```
yan@am-002b67307289:~/dev/buildroot$ make qemu_arm_vexpress_defconfig
#
# configuration written to /home/yan/dev/buildroot/.config
#
yan@am-002b67307289:~/dev/buildroot$ git status
On branch 2022.02.x
Your branch is up to date with 'origin/2022.02.x'.
nothing to commit, working tree clean
```
```
ls configs/
qemu_arm_versatile_defconfig qemu_arm_versatile_nommu_defconfig qemu_arm_vexpress_defconfig qemu_arm_vexpress_tz_defconfig #Trustzone
```
Compile 不會過
```
/home/yan/dev/buildroot/output/host/bin/arm-buildroot-linux-gnueabihf-gcc -Wp,-MD,kernel/.fork.o.d -nostdinc -isystem /home/yan/dev/buildroot/output/host/lib/gcc/arm-buildroot-linux-gnueabihf/10.3.0/include -I./arch/arm/include -Iarch/arm/include/generated/uapi -Iarch/arm/include/generated -Iinclude -I./arch/arm/include/uapi -Iarch/arm/include/generated/uapi -I./include/uapi -Iinclude/generated/uapi -include ./include/linux/kconfig.h -D__KERNEL__ -mlittle-endian -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs -fno-strict-aliasing -fno-common -Werror-implicit-function-declaration -Wno-format-security -std=gnu89 -fno-dwarf2-cfi-asm -fno-ipa-sra -mabi=aapcs-linux -mno-thumb-interwork -mfpu=vfp -funwind-tables -marm -D__LINUX_ARM_ARCH__=7 -march=armv7-a -msoft-float -Uarm -fno-delete-null-pointer-checks -O2 -Wframe-larger-than=1024 -fno-stack-protector -Wno-unused-but-set-variable -Wno-unused-const-variable -fomit-frame-pointer -fno-var-tracking-assignments -g -Wdeclaration-after-statement -Wno-pointer-sign -fno-strict-overflow -fconserve-stack -Werror=implicit-int -Werror=strict-prototypes -Werror=date-time -Werror=incompatible-pointer-types -Wno-attribute-alias -D"KBUILD_STR(s)=#s" -D"KBUILD_BASENAME=KBUILD_STR(fork)" -D"KBUILD_MODNAME=KBUILD_STR(fork)" -c -o kernel/fork.o kernel/fork.c -v
Using built-in specs.
COLLECT_GCC=/home/yan/dev/buildroot/output/host/bin/arm-buildroot-linux-gnueabihf-gcc.br_real
Target: arm-buildroot-linux-gnueabihf
Configured with: ./configure --prefix=/home/yan/dev/buildroot/output/host --sysconfdir=/home/yan/dev/buildroot/output/host/etc --enable-static --target=arm-buildroot-linux-gnueabihf --with-sysroot=/home/yan/dev/buildroot/output/host/arm-buildroot-linux-gnueabihf/sysroot --enable-__cxa_atexit --with-gnu-ld --disable-libssp --disable-multilib --disable-decimal-float --with-gmp=/home/yan/dev/buildroot/output/host --with-mpc=/home/yan/dev/buildroot/output/host --with-mpfr=/home/yan/dev/buildroot/output/host --with-pkgversion='Buildroot 2022.02-521-g114487dfd2' --with-bugurl=http://bugs.buildroot.net/ --without-zstd --disable-libquadmath --disable-libquadmath-support --enable-tls --enable-threads --without-isl --without-cloog --with-abi=aapcs-linux --with-cpu=cortex-a9 --with-fpu=vfpv3-d16 --with-float=hard --with-mode=arm --enable-languages=c --with-build-time-tools=/home/yan/dev/buildroot/output/host/arm-buildroot-linux-gnueabihf/bin --enable-shared --disable-libgomp
Thread model: posix
Supported LTO compression algorithms: zlib
gcc version 10.3.0 (Buildroot 2022.02-521-g114487dfd2)
COLLECT_GCC_OPTIONS='-fstack-protector-strong' '-nostdinc' '-isystem' '/home/yan/dev/buildroot/output/host/lib/gcc/arm-buildroot-linux-gnueabihf/10.3.0/include' '-I' './arch/arm/include' '-I' 'arch/arm/include/generated/uapi' '-I' 'arch/arm/include/generated' '-I' 'include' '-I' './arch/arm/include/uapi' '-I' 'arch/arm/include/generated/uapi' '-I' './include/uapi' '-I' 'include/generated/uapi' '-include' './include/linux/kconfig.h' '-D' '__KERNEL__' '-mlittle-endian' '-Wall' '-Wundef' '-Wstrict-prototypes' '-Wno-trigraphs' '-fno-strict-aliasing' '-fno-common' '-Werror=implicit-function-declaration' '-Wno-format-security' '-std=gnu90' '-fno-dwarf2-cfi-asm' '-fno-ipa-sra' '-mabi=aapcs-linux' '-mno-thumb-interwork' '-mfpu=vfp' '-funwind-tables' '-marm' '-D' '__LINUX_ARM_ARCH__=7' '-mfloat-abi=soft' '-U' 'arm' '-fno-delete-null-pointer-checks' '-O2' '-Wframe-larger-than=1024' '-fno-stack-protector' '-Wno-unused-but-set-variable' '-Wunused-const-variable=0' '-fomit-frame-pointer' '-fno-var-tracking-assignments' '-g' '-Wdeclaration-after-statement' '-Wno-pointer-sign' '-fno-strict-overflow' '-fconserve-stack' '-Werror=implicit-int' '-Werror=strict-prototypes' '-Werror=date-time' '-Werror=incompatible-pointer-types' '-Wattribute-alias=0' '-D' 'KBUILD_STR(s)=#s' '-D' 'KBUILD_BASENAME=KBUILD_STR(fork)' '-D' 'KBUILD_MODNAME=KBUILD_STR(fork)' '-c' '-o' 'kernel/fork.o' '-v' '-mtls-dialect=gnu' '-march=armv7-a'
/home/yan/dev/buildroot/output/host/libexec/gcc/arm-buildroot-linux-gnueabihf/10.3.0/cc1 -quiet -nostdinc -v -I ./arch/arm/include -I arch/arm/include/generated/uapi -I arch/arm/include/generated -I include -I ./arch/arm/include/uapi -I arch/arm/include/generated/uapi -I ./include/uapi -I include/generated/uapi -isysroot /home/yan/dev/buildroot/output/host/arm-buildroot-linux-gnueabihf/sysroot -D __KERNEL__ -D __LINUX_ARM_ARCH__=7 -U arm -D KBUILD_STR(s)=#s -D KBUILD_BASENAME=KBUILD_STR(fork) -D KBUILD_MODNAME=KBUILD_STR(fork) -isystem /home/yan/dev/buildroot/output/host/lib/gcc/arm-buildroot-linux-gnueabihf/10.3.0/include -include ./include/linux/kconfig.h -MD kernel/.fork.o.d kernel/fork.c -quiet -dumpbase fork.c -mlittle-endian -mabi=aapcs-linux -mno-thumb-interwork -mfpu=vfp -marm -mfloat-abi=soft -mtls-dialect=gnu -march=armv7-a -auxbase-strip kernel/fork.o -g -O2 -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs -Werror=implicit-function-declaration -Wno-format-security -Wframe-larger-than=1024 -Wno-unused-but-set-variable -Wunused-const-variable=0 -Wdeclaration-after-statement -Wno-pointer-sign -Werror=implicit-int -Werror=strict-prototypes -Werror=date-time -Werror=incompatible-pointer-types -Wattribute-alias=0 -std=gnu90 -version -fstack-protector-strong -fno-strict-aliasing -fno-common -fno-dwarf2-cfi-asm -fno-ipa-sra -funwind-tables -fno-delete-null-pointer-checks -fno-stack-protector -fomit-frame-pointer -fno-var-tracking-assignments -fno-strict-overflow -fconserve-stack -o /tmp/ccYYcoHI.s
GNU C89 (Buildroot 2022.02-521-g114487dfd2) version 10.3.0 (arm-buildroot-linux-gnueabihf)
compiled by GNU C version 10.2.1 20210110, GMP version 6.2.1, MPFR version 4.1.0, MPC version 1.2.1, isl version none
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
ignoring duplicate directory "arch/arm/include/generated/uapi"
#include "..." search starts here:
#include <...> search starts here:
./arch/arm/include
arch/arm/include/generated/uapi
arch/arm/include/generated
include
./arch/arm/include/uapi
./include/uapi
include/generated/uapi
/home/yan/dev/buildroot/output/host/lib/gcc/arm-buildroot-linux-gnueabihf/10.3.0/include
End of search list.
GNU C89 (Buildroot 2022.02-521-g114487dfd2) version 10.3.0 (arm-buildroot-linux-gnueabihf)
compiled by GNU C version 10.2.1 20210110, GMP version 6.2.1, MPFR version 4.1.0, MPC version 1.2.1, isl version none
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: f0b4a9b923e6cc478a2ab2aeb6c8f754
In file included from include/linux/kernel.h:11,
from include/asm-generic/bug.h:13,
from ./arch/arm/include/asm/bug.h:62,
from include/linux/bug.h:4,
from include/linux/mmdebug.h:4,
from include/linux/gfp.h:4,
from include/linux/slab.h:14,
from kernel/fork.c:14:
include/linux/log2.h:22:1: warning: ignoring attribute ‘noreturn’ because it conflicts with attribute ‘const’ [-Wattributes]
22 | int ____ilog2_NaN(void);
| ^~~
COLLECT_GCC_OPTIONS='-fstack-protector-strong' '-nostdinc' '-isystem' '/home/yan/dev/buildroot/output/host/lib/gcc/arm-buildroot-linux-gnueabihf/10.3.0/include' '-I' './arch/arm/include' '-I' 'arch/arm/include/generated/uapi' '-I' 'arch/arm/include/generated' '-I' 'include' '-I' './arch/arm/include/uapi' '-I' 'arch/arm/include/generated/uapi' '-I' './include/uapi' '-I' 'include/generated/uapi' '-include' './include/linux/kconfig.h' '-D' '__KERNEL__' '-mlittle-endian' '-Wall' '-Wundef' '-Wstrict-prototypes' '-Wno-trigraphs' '-fno-strict-aliasing' '-fno-common' '-Werror=implicit-function-declaration' '-Wno-format-security' '-std=gnu90' '-fno-dwarf2-cfi-asm' '-fno-ipa-sra' '-mabi=aapcs-linux' '-mno-thumb-interwork' '-mfpu=vfp' '-funwind-tables' '-marm' '-D' '__LINUX_ARM_ARCH__=7' '-mfloat-abi=soft' '-U' 'arm' '-fno-delete-null-pointer-checks' '-O2' '-Wframe-larger-than=1024' '-fno-stack-protector' '-Wno-unused-but-set-variable' '-Wunused-const-variable=0' '-fomit-frame-pointer' '-fno-var-tracking-assignments' '-g' '-Wdeclaration-after-statement' '-Wno-pointer-sign' '-fno-strict-overflow' '-fconserve-stack' '-Werror=implicit-int' '-Werror=strict-prototypes' '-Werror=date-time' '-Werror=incompatible-pointer-types' '-Wattribute-alias=0' '-D' 'KBUILD_STR(s)=#s' '-D' 'KBUILD_BASENAME=KBUILD_STR(fork)' '-D' 'KBUILD_MODNAME=KBUILD_STR(fork)' '-c' '-o' 'kernel/fork.o' '-v' '-mtls-dialect=gnu' '-march=armv7-a'
/home/yan/dev/buildroot/output/host/lib/gcc/arm-buildroot-linux-gnueabihf/10.3.0/../../../../arm-buildroot-linux-gnueabihf/bin/as -v -I ./arch/arm/include -I arch/arm/include/generated/uapi -I arch/arm/include/generated -I include -I ./arch/arm/include/uapi -I arch/arm/include/generated/uapi -I ./include/uapi -I include/generated/uapi -EL -march=armv7-a -mfloat-abi=soft -mfpu=vfp -meabi=5 -o kernel/fork.o /tmp/ccYYcoHI.s
GNU assembler version 2.37 (arm-buildroot-linux-gnueabihf) using BFD version (GNU Binutils) 2.37
/tmp/ccYYcoHI.s: Assembler messages:
/tmp/ccYYcoHI.s:3348: Error: .err encountered
```
> 稍微研究了一下，發現是新版 GCC const register 出問題，但這個問題需要一步一步測試，但由於這並不是我們要的最終版本，我們可以不一定要解他，當初做這個的想法是，有一個對照版本
> 以下是有用資訊
> [gcc: Bug 85745 - variable with asm register assignment allocated in wrong reg](https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85745)
> [Bug 86673 - [8/9 regression] inline asm sometimes ignores 'register asm("reg")' declarations](https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86673)
> [/tmp/cctnQ1CM.s:35: Error: .err encountered](https://patchwork.kernel.org/project/linux-mm/patch/20180630111210.ec9de2c2923a0c58b1357965@linux-foundation.org/)
> [GCC 8.3 ARM Assembly error when building Linux kernel 3.14.17 in Buildroot 2020.02 setup](https://stackoverflow.com/questions/61235299/gcc-8-3-arm-assembly-error-when-building-linux-kernel-3-14-17-in-buildroot-2020)
### multiple definition of `yylloc'
```c=
(.text+0x0): multiple definition of `yylloc'; dtc-lexer.lex.o (symbol from plugin):(.text+0x0): first defined here
```
> https://review.lineageos.org/c/LineageOS/android_kernel_oneplus_sm8150/+/273023
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