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utterances-bot opened this issue Apr 28, 2023 · 4 comments
Open

rCore-Tutorial-Book-v3/chapter7/3cmdargs-and-redirection #182

utterances-bot opened this issue Apr 28, 2023 · 4 comments
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@utterances-bot
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命令行参数与标准 I/O 重定向 - rCore-Tutorial-Book-v3 3.6.0-alpha.1 文档

https://rcore-os.cn/rCore-Tutorial-Book-v3/chapter7/3cmdargs-and-redirection.html
@Hlinbit utterances
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Hlinbit commented Apr 28, 2023

竟然没有人评论，那我就来做第一个吧。嘿嘿

@kyrosle utterances
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kyrosle commented May 1, 2023

嘿嘿

@wyfcyx wyfcyx added the comments An area where readers can discuss related topics after every article. label Jun 2, 2023
@lythesia utterances
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一个问题 user/src/lib.rs里的args应该都append一个\0, 否则可能导致字符串的passing不正确, 虽然ch7的代码直接run是ok的, 但应该是因为那个地址的byte刚好是\0而已..

@RyoJerryYu utterances
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在内核态的 sys_exec 里需要将 argc 作为返回值返回。不然 syscall 默认将返回值放入 a0 寄存器会将 argc 覆盖。

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@lythesia @wyfcyx @Hlinbit @utterances-bot @RyoJerryYu @kyrosle