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target/loongarch: Update README
Add linux-user emulation introduction Signed-off-by: Song Gao <gaosong@loongson.cn> Signed-off-by: Xiaojuan Yang <yangxiaojuan@loongson.cn> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20220624031049.1716097-14-gaosong@loongson.cn> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
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@ -24,9 +24,9 @@
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Download cross-tools.
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wget https://github.com/loongson/build-tools/releases/latest/download/loongarch64-clfs-20211202-cross-tools.tar.xz
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wget https://github.com/loongson/build-tools/releases/download/2022.05.29/loongarch64-clfs-5.0-cross-tools-gcc-full.tar.xz
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tar -vxf loongarch64-clfs-20211202-cross-tools.tar.xz -C /opt
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tar -vxf loongarch64-clfs-5.0-cross-tools-gcc-full.tar.xz -C /opt
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Config cross-tools env.
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@ -60,5 +60,40 @@
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./build/qemu-system-loongarch64 -machine virt -m 4G -cpu Loongson-3A5000 -smp 1 -kernel build/tests/tcg/loongarch64-softmmu/hello -monitor none -display none -chardev file,path=hello.out,id=output -serial chardev:output
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- Linux-user emulation
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We already support Linux user emulation. We can use LoongArch cross-tools to build LoongArch executables on X86 machines,
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and We can also use qemu-loongarch64 to run LoongArch executables.
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1. Config cross-tools env.
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see System emulation.
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2. Test tests/tcg/multiarch.
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./configure --static --prefix=/usr --disable-werror --target-list="loongarch64-linux-user" --enable-debug
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cd build
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make && make check-tcg
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3. Run LoongArch system basic command with loongarch-clfs-system.
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- Config clfs env.
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wget https://github.com/loongson/build-tools/releases/download/2022.05.29/loongarch64-clfs-system-5.0.tar.bz2
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tar -vxf loongarch64-clfs-system-5.0.tar.bz2 -C /opt/clfs
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cp /opt/clfs/lib64/ld-linux-loongarch-lp64d.so.1 /lib64
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export LD_LIBRARY_PATH="/opt/clfs/lib64"
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- Run LoongArch system basic command.
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./qemu-loongarch64 /opt/clfs/usr/bin/bash
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./qemu-loongarch64 /opt/clfs/usr/bin/ls
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./qemu-loongarch64 /opt/clfs/usr/bin/pwd
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- Note.
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We can get the latest LoongArch documents or LoongArch tools at https://github.com/loongson/
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