RISC-V にっき
夏らしく日記っぽく。したのほうがあたらしいです。
2019/8/5
RISC-V 向けのビルドツールのインストール
$ sudo apt-get install git autoconf automake autotools-dev curl libmpc-dev libmpfr-dev libgmp-dev gawk build-essential bison flex texinfo gperf libtool patchutils bc zlib1g-dev libexpat-dev
$ git clone https://github.com/riscv/riscv-gnu-toolchain
$ git submodule update --init --recursive
--> 9.2GBくらいになる
$ cd riscv-gnu-toolchain
$ sudo mkdir /opt/riscv
$ ./configure --prefix=/opt/riscv
$ sudo make
2019/8/6
インストールできたバイナリたち
$ find /opt/riscv/bin -type f
/opt/riscv/bin/riscv64-unknown-elf-addr2line
/opt/riscv/bin/riscv64-unknown-elf-readelf
/opt/riscv/bin/riscv64-unknown-elf-gcc
/opt/riscv/bin/riscv64-unknown-elf-objcopy
/opt/riscv/bin/riscv64-unknown-elf-run
/opt/riscv/bin/riscv64-unknown-elf-size
/opt/riscv/bin/riscv64-unknown-elf-gcc-ar
/opt/riscv/bin/riscv64-unknown-elf-c++
/opt/riscv/bin/riscv64-unknown-elf-gcov-dump
/opt/riscv/bin/riscv64-unknown-elf-strip
/opt/riscv/bin/riscv64-unknown-elf-gcc-ranlib
/opt/riscv/bin/riscv64-unknown-elf-objdump
/opt/riscv/bin/riscv64-unknown-elf-elfedit
/opt/riscv/bin/riscv64-unknown-elf-cpp
/opt/riscv/bin/riscv64-unknown-elf-gdb-add-index
/opt/riscv/bin/riscv64-unknown-elf-strings
/opt/riscv/bin/riscv64-unknown-elf-gcov
/opt/riscv/bin/riscv64-unknown-elf-ld
/opt/riscv/bin/riscv64-unknown-elf-g++
/opt/riscv/bin/riscv64-unknown-elf-gcov-tool
/opt/riscv/bin/riscv64-unknown-elf-gcc-nm
/opt/riscv/bin/riscv64-unknown-elf-nm
/opt/riscv/bin/riscv64-unknown-elf-gcc-8.3.0
/opt/riscv/bin/riscv64-unknown-elf-gprof
/opt/riscv/bin/riscv64-unknown-elf-gdb
/opt/riscv/bin/riscv64-unknown-elf-ld.bfd
/opt/riscv/bin/riscv64-unknown-elf-as
/opt/riscv/bin/riscv64-unknown-elf-ar
/opt/riscv/bin/riscv64-unknown-elf-ranlib
/opt/riscv/bin/riscv64-unknown-elf-c++filt
不要な git レポジトリは削除しておくのがいい。 今回はgcp上につくったので、ストレージの費用は大切。
Spike(エミュレータ)のインストール
ビルド後でも300MBちょっと。おさいふにやさしい。
$ sudo apt install device-tree-compiler
$ git clone https://github.com/riscv/riscv-isa-sim.git
$ cd riscv-isa-sim
$ mkdir build
$ cd build
$ ../configure --prefix=/opt/riscv
$ make
$ sudo make install
Hello World プログラムをつくって spike pk hello とでためしてみるとエラー。
どうやら riscv-pk (proxy kernel) をわすれているようだ。
https://forums.sifive.com/t/an-error-when-running-spike/1247
riscv-pk のインストール
$ git clone https://github.com/riscv/riscv-pk.git
$ cd riscv-pk
$ mkdir build
$ cd build
$ ../configure --prefix=/opt/riscv --host=riscv64-unknown-elf
$ make
$ sudo make install
これでひとあんしん。hello, world ができた。
2019/8/7
bbl loader とはなにか
ハローワールドでもそうだが、なにもしないプログラムでも
bbl loader という文字列が標準出力される。
$ cat main.c
int main () { return 0; }
$ riscv64-unknown-elf-gcc main.c
$ spike pk ./a.out
bbl loader
pk とはなにかという話になるとおもうんだけど、
pk は Proxy Kernel とのことで、どうやらホストのカーネルで実行させている雰囲気。
ltrace でなにが呼ばれているかみようとしたが、6MB程度のファイルになった。
$ ltrace -o ltrace.log spike pk ./a.out
$ ls -lh ltrace.log
-rw-r--r-- 1 user user 5.7M Aug 6 23:06 ltrace.log
みてみると、bbl loader は write システムコールで出力されているようだ。
ちなみに _Znwm と _ZdlPv は C++ の new と delete に対応するらしい。
https://stackoverflow.com/questions/47337760/what-does-znwm-and-zdlpv-mean-in-assembly
write(1, "b", 1) = 1
_ZdlPv(0x559ed3ed5f10, 0x7ffc89064960, 3, 0x7f7e2fb021b0) = 0
_ZdlPv(0x559ed3ed5ef0, 0x7ffc89064a00, 3, 0) = 0x559ed3ed5f00
_ZdlPv(0x559ed3ed5ed0, 0x7ffc89064b30, 3, 0x559ed3ed5f00) = 0x559ed3ed5ee0
_ZdlPv(0x559ed3ed5eb0, 0x7ffc89064ab0, 3, 0x559ed3ed5ee0) = 0x559ed3ed5ec0
swapcontext(0x559ed3ec5470, 0x559ed3e7a7c0, 0x559ed3ea0ec0, 0x8000a) = 0
swapcontext(0x559ed3e7a7c0, 0x559ed3ec5470, 0x7ffc89065028, 0x7f7e2fee5010) = 0
memset(0x7ffc89064940, '\0', 8) = 0x7ffc89064940
_Znwm(16, 0x7ffc89064a60, 2, 0) = 0x559ed3ed5eb0
_Znwm(16, 0x7ffc89064a80, 2, 0x7f7e2f04bb00) = 0x559ed3ed5ed0
_ZdlPv(0x559ed3ed5eb0, 0x7ffc89064a80, 3, 0x7f7e2f04bb00) = 0x559ed3ed5ee0
_Znwm(16, 0x7ffc89064ab0, 2, 0x559ed3ed5ee0) = 0x559ed3ed5eb0
_Znwm(16, 0x7ffc89064b30, 2, 0x7f7e2f04bb00) = 0x559ed3ed5ef0
_Znwm(16, 0x7ffc89064a00, 2, 0x7f7e2f04bb00) = 0x559ed3ed5f10
write(1, "b", 1) = 1
_ZdlPv(0x559ed3ed5f10, 0x7ffc89064960, 3, 0x7f7e2fb021b0) = 0
_ZdlPv(0x559ed3ed5ef0, 0x7ffc89064a00, 3, 0) = 0x559ed3ed5f00
_ZdlPv(0x559ed3ed5eb0, 0x7ffc89064b30, 3, 0x559ed3ed5f00) = 0x559ed3ed5ee0
_ZdlPv(0x559ed3ed5ed0, 0x7ffc89064ab0, 3, 0x559ed3ed5ee0) = 0x559ed3ed5ea0
swapcontext(0x559ed3ec5470, 0x559ed3e7a7c0, 0x559ed3ea0ec0, 0x8000a) = 0
swapcontext(0x559ed3e7a7c0, 0x559ed3ec5470, 0x7ffc89065028, 0x7f7e2fee5010) = 0
memset(0x7ffc89064940, '\0', 8) = 0x7ffc89064940
_Znwm(16, 0x7ffc89064a60, 2, 0) = 0x559ed3ed5ed0
_Znwm(16, 0x7ffc89064a80, 2, 0x7f7e2f04bb00) = 0x559ed3ed5eb0
_ZdlPv(0x559ed3ed5ed0, 0x7ffc89064a80, 3, 0x7f7e2f04bb00) = 0x559ed3ed5ee0
_Znwm(16, 0x7ffc89064ab0, 2, 0x559ed3ed5ee0) = 0x559ed3ed5ed0
_Znwm(16, 0x7ffc89064b30, 2, 0x7f7e2f04bb00) = 0x559ed3ed5ef0
_Znwm(16, 0x7ffc89064a00, 2, 0x7f7e2f04bb00) = 0x559ed3ed5f10
write(1, "l", 1) = 1
_ZdlPv(0x559ed3ed5f10, 0x7ffc89064960, 3, 0x7f7e2fb021b0) = 0
_ZdlPv(0x559ed3ed5ef0, 0x7ffc89064a00, 3, 0) = 0x559ed3ed5f00
_ZdlPv(0x559ed3ed5ed0, 0x7ffc89064b30, 3, 0x559ed3ed5f00) = 0x559ed3ed5ee0
_ZdlPv(0x559ed3ed5eb0, 0x7ffc89064ab0, 3, 0x559ed3ed5ee0) = 0x559ed3ed5ec0
swapcontext(0x559ed3ec5470, 0x559ed3e7a7c0, 0x559ed3ea0ec0, 0x8000a) = 0
swapcontext(0x559ed3e7a7c0, 0x559ed3ec5470, 0x7ffc89065028, 0x7f7e2fee5010) = 0
memset(0x7ffc89064940, '\0', 8) = 0x7ffc89064940
_Znwm(16, 0x7ffc89064a60, 2, 0) = 0x559ed3ed5eb0
_Znwm(16, 0x7ffc89064a80, 2, 0x7f7e2f04bb00) = 0x559ed3ed5ed0
_ZdlPv(0x559ed3ed5eb0, 0x7ffc89064a80, 3, 0x7f7e2f04bb00) = 0x559ed3ed5ee0
_Znwm(16, 0x7ffc89064ab0, 2, 0x559ed3ed5ee0) = 0x559ed3ed5eb0
_Znwm(16, 0x7ffc89064b30, 2, 0x7f7e2f04bb00) = 0x559ed3ed5ef0
_Znwm(16, 0x7ffc89064a00, 2, 0x7f7e2f04bb00) = 0x559ed3ed5f10
write(1, " ", 1) = 1
_ZdlPv(0x559ed3ed5f10, 0x7ffc89064960, 3, 0x7f7e2fb021b0) = 0
_ZdlPv(0x559ed3ed5ef0, 0x7ffc89064a00, 3, 0) = 0x559ed3ed5f00
_ZdlPv(0x559ed3ed5eb0, 0x7ffc89064b30, 3, 0x559ed3ed5f00) = 0x559ed3ed5ee0
_ZdlPv(0x559ed3ed5ed0, 0x7ffc89064ab0, 3, 0x559ed3ed5ee0) = 0x559ed3ed5ea0
swapcontext(0x559ed3ec5470, 0x559ed3e7a7c0, 0x559ed3ea0ec0, 0x8000a) = 0
swapcontext(0x559ed3e7a7c0, 0x559ed3ec5470, 0x7ffc89065028, 0x7f7e2fee5010) = 0
memset(0x7ffc89064940, '\0', 8) = 0x7ffc89064940
_Znwm(16, 0x7ffc89064a60, 2, 0) = 0x559ed3ed5ed0
_Znwm(16, 0x7ffc89064a80, 2, 0x7f7e2f04bb00) = 0x559ed3ed5eb0
_ZdlPv(0x559ed3ed5ed0, 0x7ffc89064a80, 3, 0x7f7e2f04bb00) = 0x559ed3ed5ee0
_Znwm(16, 0x7ffc89064ab0, 2, 0x559ed3ed5ee0) = 0x559ed3ed5ed0
_Znwm(16, 0x7ffc89064b30, 2, 0x7f7e2f04bb00) = 0x559ed3ed5ef0
_Znwm(16, 0x7ffc89064a00, 2, 0x7f7e2f04bb00) = 0x559ed3ed5f10
write(1, "l", 1) = 1
_ZdlPv(0x559ed3ed5f10, 0x7ffc89064960, 3, 0x7f7e2fb021b0) = 0
_ZdlPv(0x559ed3ed5ef0, 0x7ffc89064a00, 3, 0) = 0x559ed3ed5f00
_ZdlPv(0x559ed3ed5ed0, 0x7ffc89064b30, 3, 0x559ed3ed5f00) = 0x559ed3ed5ee0
_ZdlPv(0x559ed3ed5eb0, 0x7ffc89064ab0, 3, 0x559ed3ed5ee0) = 0x559ed3ed5ec0
swapcontext(0x559ed3ec5470, 0x559ed3e7a7c0, 0x559ed3ea0ec0, 0x8000a) = 0
swapcontext(0x559ed3e7a7c0, 0x559ed3ec5470, 0x7ffc89065028, 0x7f7e2fee5010) = 0
memset(0x7ffc89064940, '\0', 8) = 0x7ffc89064940
_Znwm(16, 0x7ffc89064a60, 2, 0) = 0x559ed3ed5eb0
_Znwm(16, 0x7ffc89064a80, 2, 0x7f7e2f04bb00) = 0x559ed3ed5ed0
_ZdlPv(0x559ed3ed5eb0, 0x7ffc89064a80, 3, 0x7f7e2f04bb00) = 0x559ed3ed5ee0
_Znwm(16, 0x7ffc89064ab0, 2, 0x559ed3ed5ee0) = 0x559ed3ed5eb0
_Znwm(16, 0x7ffc89064b30, 2, 0x7f7e2f04bb00) = 0x559ed3ed5ef0
_Znwm(16, 0x7ffc89064a00, 2, 0x7f7e2f04bb00) = 0x559ed3ed5f10
write(1, "o", 1) = 1
_ZdlPv(0x559ed3ed5f10, 0x7ffc89064960, 3, 0x7f7e2fb021b0) = 0
_ZdlPv(0x559ed3ed5ef0, 0x7ffc89064a00, 3, 0) = 0x559ed3ed5f00
_ZdlPv(0x559ed3ed5eb0, 0x7ffc89064b30, 3, 0x559ed3ed5f00) = 0x559ed3ed5ee0
_ZdlPv(0x559ed3ed5ed0, 0x7ffc89064ab0, 3, 0x559ed3ed5ee0) = 0x559ed3ed5ea0
swapcontext(0x559ed3ec5470, 0x559ed3e7a7c0, 0x559ed3ea0ec0, 0x8000a) = 0
swapcontext(0x559ed3e7a7c0, 0x559ed3ec5470, 0x7ffc89065028, 0x7f7e2fee5010) = 0
memset(0x7ffc89064940, '\0', 8) = 0x7ffc89064940
_Znwm(16, 0x7ffc89064a60, 2, 0) = 0x559ed3ed5ed0
_Znwm(16, 0x7ffc89064a80, 2, 0x7f7e2f04bb00) = 0x559ed3ed5eb0
_ZdlPv(0x559ed3ed5ed0, 0x7ffc89064a80, 3, 0x7f7e2f04bb00) = 0x559ed3ed5ee0
_Znwm(16, 0x7ffc89064ab0, 2, 0x559ed3ed5ee0) = 0x559ed3ed5ed0
_Znwm(16, 0x7ffc89064b30, 2, 0x7f7e2f04bb00) = 0x559ed3ed5ef0
_Znwm(16, 0x7ffc89064a00, 2, 0x7f7e2f04bb00) = 0x559ed3ed5f10
write(1, "a", 1) = 1
_ZdlPv(0x559ed3ed5f10, 0x7ffc89064960, 3, 0x7f7e2fb021b0) = 0
_ZdlPv(0x559ed3ed5ef0, 0x7ffc89064a00, 3, 0) = 0x559ed3ed5f00
_ZdlPv(0x559ed3ed5ed0, 0x7ffc89064b30, 3, 0x559ed3ed5f00) = 0x559ed3ed5ee0
_ZdlPv(0x559ed3ed5eb0, 0x7ffc89064ab0, 3, 0x559ed3ed5ee0) = 0x559ed3ed5ec0
swapcontext(0x559ed3ec5470, 0x559ed3e7a7c0, 0x559ed3ea0ec0, 0x8000a) = 0
swapcontext(0x559ed3e7a7c0, 0x559ed3ec5470, 0x7ffc89065028, 0x7f7e2fee5010) = 0
memset(0x7ffc89064940, '\0', 8) = 0x7ffc89064940
_Znwm(16, 0x7ffc89064a60, 2, 0) = 0x559ed3ed5eb0
_Znwm(16, 0x7ffc89064a80, 2, 0x7f7e2f04bb00) = 0x559ed3ed5ed0
_ZdlPv(0x559ed3ed5eb0, 0x7ffc89064a80, 3, 0x7f7e2f04bb00) = 0x559ed3ed5ee0
_Znwm(16, 0x7ffc89064ab0, 2, 0x559ed3ed5ee0) = 0x559ed3ed5eb0
_Znwm(16, 0x7ffc89064b30, 2, 0x7f7e2f04bb00) = 0x559ed3ed5ef0
_Znwm(16, 0x7ffc89064a00, 2, 0x7f7e2f04bb00) = 0x559ed3ed5f10
write(1, "d", 1) = 1
_ZdlPv(0x559ed3ed5f10, 0x7ffc89064960, 3, 0x7f7e2fb021b0) = 0
_ZdlPv(0x559ed3ed5ef0, 0x7ffc89064a00, 3, 0) = 0x559ed3ed5f00
_ZdlPv(0x559ed3ed5eb0, 0x7ffc89064b30, 3, 0x559ed3ed5f00) = 0x559ed3ed5ee0
_ZdlPv(0x559ed3ed5ed0, 0x7ffc89064ab0, 3, 0x559ed3ed5ee0) = 0x559ed3ed5ea0
swapcontext(0x559ed3ec5470, 0x559ed3e7a7c0, 0x559ed3ea0ec0, 0x8000a) = 0
swapcontext(0x559ed3e7a7c0, 0x559ed3ec5470, 0x7ffc89065028, 0x7f7e2fee5010) = 0
memset(0x7ffc89064940, '\0', 8) = 0x7ffc89064940
_Znwm(16, 0x7ffc89064a60, 2, 0) = 0x559ed3ed5ed0
_Znwm(16, 0x7ffc89064a80, 2, 0x7f7e2f04bb00) = 0x559ed3ed5eb0
_ZdlPv(0x559ed3ed5ed0, 0x7ffc89064a80, 3, 0x7f7e2f04bb00) = 0x559ed3ed5ee0
_Znwm(16, 0x7ffc89064ab0, 2, 0x559ed3ed5ee0) = 0x559ed3ed5ed0
_Znwm(16, 0x7ffc89064b30, 2, 0x7f7e2f04bb00) = 0x559ed3ed5ef0
_Znwm(16, 0x7ffc89064a00, 2, 0x7f7e2f04bb00) = 0x559ed3ed5f10
write(1, "e", 1) = 1
_ZdlPv(0x559ed3ed5f10, 0x7ffc89064960, 3, 0x7f7e2fb021b0) = 0
_ZdlPv(0x559ed3ed5ef0, 0x7ffc89064a00, 3, 0) = 0x559ed3ed5f00
_ZdlPv(0x559ed3ed5ed0, 0x7ffc89064b30, 3, 0x559ed3ed5f00) = 0x559ed3ed5ee0
_ZdlPv(0x559ed3ed5eb0, 0x7ffc89064ab0, 3, 0x559ed3ed5ee0) = 0x559ed3ed5ec0
swapcontext(0x559ed3ec5470, 0x559ed3e7a7c0, 0x559ed3ea0ec0, 0x8000a) = 0
swapcontext(0x559ed3e7a7c0, 0x559ed3ec5470, 0x7ffc89065028, 0x7f7e2fee5010) = 0
memset(0x7ffc89064940, '\0', 8) = 0x7ffc89064940
_Znwm(16, 0x7ffc89064a60, 2, 0) = 0x559ed3ed5eb0
_Znwm(16, 0x7ffc89064a80, 2, 0x7f7e2f04bb00) = 0x559ed3ed5ed0
_ZdlPv(0x559ed3ed5eb0, 0x7ffc89064a80, 3, 0x7f7e2f04bb00) = 0x559ed3ed5ee0
_Znwm(16, 0x7ffc89064ab0, 2, 0x559ed3ed5ee0) = 0x559ed3ed5eb0
_Znwm(16, 0x7ffc89064b30, 2, 0x7f7e2f04bb00) = 0x559ed3ed5ef0
_Znwm(16, 0x7ffc89064a00, 2, 0x7f7e2f04bb00) = 0x559ed3ed5f10
write(1, "r", 1) = 1
_ZdlPv(0x559ed3ed5f10, 0x7ffc89064960, 3, 0x7f7e2fb021b0) = 0
_ZdlPv(0x559ed3ed5ef0, 0x7ffc89064a00, 3, 0) = 0x559ed3ed5f00
_ZdlPv(0x559ed3ed5eb0, 0x7ffc89064b30, 3, 0x559ed3ed5f00) = 0x559ed3ed5ee0
_ZdlPv(0x559ed3ed5ed0, 0x7ffc89064ab0, 3, 0x559ed3ed5ee0) = 0x559ed3ed5ea0
swapcontext(0x559ed3ec5470, 0x559ed3e7a7c0, 0x559ed3ea0ec0, 0x8000a) = 0
swapcontext(0x559ed3e7a7c0, 0x559ed3ec5470, 0x7ffc89065028, 0x7f7e2fee5010) = 0
memset(0x7ffc89064940, '\0', 8) = 0x7ffc89064940
_Znwm(16, 0x7ffc89064a60, 2, 0) = 0x559ed3ed5ed0
_Znwm(16, 0x7ffc89064a80, 2, 0x7f7e2f04bb00) = 0x559ed3ed5eb0
_ZdlPv(0x559ed3ed5ed0, 0x7ffc89064a80, 3, 0x7f7e2f04bb00) = 0x559ed3ed5ee0
_Znwm(16, 0x7ffc89064ab0, 2, 0x559ed3ed5ee0) = 0x559ed3ed5ed0
_Znwm(16, 0x7ffc89064b30, 2, 0x7f7e2f04bb00) = 0x559ed3ed5ef0
_Znwm(16, 0x7ffc89064a00, 2, 0x7f7e2f04bb00) = 0x559ed3ed5f10
write(1, "\r", 1) = 1
_ZdlPv(0x559ed3ed5f10, 0x7ffc89064960, 3, 0x7f7e2fb021b0) = 0
_ZdlPv(0x559ed3ed5ef0, 0x7ffc89064a00, 3, 0) = 0x559ed3ed5f00
_ZdlPv(0x559ed3ed5ed0, 0x7ffc89064b30, 3, 0x559ed3ed5f00) = 0x559ed3ed5ee0
_ZdlPv(0x559ed3ed5eb0, 0x7ffc89064ab0, 3, 0x559ed3ed5ee0) = 0x559ed3ed5ec0
swapcontext(0x559ed3ec5470, 0x559ed3e7a7c0, 0x559ed3ea0ec0, 0x8000a) = 0