请提供qemu linux userspace程序

[nihui]

上个版本有发布的qemu，怎么这次删掉了？
需要这个qemu在x86服务器上跑ci

[FreeFlyingSheep]

已更新。

[nihui]

已更新。

用起来不正常，以下是用交叉编译工具链编译 helloworld，用 qemu 跑的过程

下载工具链和qemu

wget https://github.com/loongson/build-tools/releases/download/2022.05.29/loongarch64-clfs-5.0-cross-tools-gcc-glibc.tar.xz
tar -xf loongarch64-clfs-5.0-cross-tools-gcc-glibc.tar.xz
wget https://github.com/loongson/build-tools/releases/download/2022.05.29/qemu-loongarch64
chmod +x qemu-loongarch64

编译cpp helloworld

echo -e "#include <iostream>\nint main() { std::cerr << \"hello loongarch64\" << std::endl; return 0; }" > hello.cpp
./cross-tools/bin/loongarch64-unknown-linux-gnu-g++ hello.cpp -march=loongarch64 -o hello

配置ld prefix，qemu执行

export LD_LIBRARY_PATH=./cross-tools/target/usr/lib64:$LD_LIBRARY_PATH
export QEMU_STRACE=1
./qemu-loongarch64 -L ./cross-tools/target/usr ./hello

报错

./hello: error while loading shared libraries: libstdc++.so.6: cannot open shared object file: Error 38

开启 export QEMU_STRACE=1 后看到输出

113 brk(NULL) = 0x000000400000c000
113 uname(0x400300ed08) = 0
113 faccessat(AT_FDCWD,"/etc/ld.so.preload",R_OK,AT_EACCESS|AT_SYMLINK_NOFOLLOW|0x3035c70) = -1 errno=2 (No such file or directory)
113 openat(AT_FDCWD,"/__w/ncnn/ncnn/cross-tools/target/usr/lib64/tls/libstdc++.so.6",O_RDONLY|O_CLOEXEC) = -1 errno=2 (No such file or directory)
113 Unknown syscall 79
113 openat(AT_FDCWD,"/__w/ncnn/ncnn/cross-tools/target/usr/lib64/libstdc++.so.6",O_RDONLY|O_CLOEXEC) = 3
113 read(3,0x300e420,832) = 832
113 Unknown syscall 79
113 close(3) = 0
./hello: error while loading shared libraries: libstdc++.so.6: cannot stat shared object: Error 38
113 writev(2,0x400300e040,0xa) = 99
113 exit_group(127)

[yetist]

我怎么感觉工具链可能要重新做一下，附件是本地静态编译出来的，用这个qemu能跑。
hello.zip

[nihui]

https://github.com/loongson/build-tools/releases/tag/2021.12.21 看到旧版本又放上来了

[nihui]

旧版本工具链，用新的qemu跑，也会报错 cannot stat shared object: Error 38，这标明 qemu 有问题？

[yetist]

动态链接的话，C库可能需要使用最新的内核头文件重新编译一下，编译之前需要打个补丁? loongson/glibc#29

[sunhaiyong1978]

要不用这个先试试？
https://github.com/loongson/build-tools/releases/download/2022.05.29/loongarch64-clfs-5.0-cross-tools-gcc-full.tar.xz

[nihui]

要不用这个先试试？ https://github.com/loongson/build-tools/releases/download/2022.05.29/loongarch64-clfs-5.0-cross-tools-gcc-full.tar.xz

测试可用！感谢