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\"a7\"), \"\\u53D6\\u51FA\", mdx(\"code\", {\n parentName: \"p\",\n \"className\": \"language-text\"\n }, \"system call number\"), \"\\uFF0C\\u5E76\\u8C03\\u7528\\u4E86\\u5BF9\\u5E94\\u7684\", mdx(\"code\", {\n parentName: \"p\",\n \"className\": \"language-text\"\n }, \"handler\"), \"\\uFF0C\\u7136\\u540E\\u628A\\u8FD4\\u56DE\\u503C\\u4FDD\\u5B58\\u5230\\u7528\\u6237\\u6001\\u7684\", mdx(\"code\", {\n parentName: \"p\",\n \"className\": \"language-text\"\n }, \"a0\"), \"\\u4E2D\\u3002\"), mdx(\"p\", null, \"\\u7CFB\\u7EDF\\u8C03\\u7528\\u8FD4\\u56DE\\u7684\\u8FC7\\u7A0B\\u6709\\u70B9\\u50CF\\u662F\\u521A\\u624D\\u7684\\u9006\\u8FC7\\u7A0B\\uFF0C\", mdx(\"code\", {\n parentName: \"p\",\n \"className\": \"language-text\"\n }, \"uservec\"), \"\\u548C\", mdx(\"code\", {\n parentName: \"p\",\n \"className\": \"language-text\"\n }, \"usertrap\"), \"\\u5206\\u522B\\u5BF9\\u5E94\", mdx(\"code\", {\n parentName: \"p\",\n \"className\": \"language-text\"\n }, \"userret\"), \"\\u548C\", 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\"language-text\"\n }, \"syscall\"), \"\\u4F1A\\u6839\\u636E\", mdx(\"code\", {\n parentName: \"li\",\n \"className\": \"language-text\"\n }, \"a7\"), \"\\u4E2D\\u4FDD\\u5B58\\u7684\", mdx(\"code\", {\n parentName: \"li\",\n \"className\": \"language-text\"\n }, \"system call number\"), \"\\u6765\\u8C03\\u7528\\u5BF9\\u5E94\\u7684\", mdx(\"code\", {\n parentName: \"li\",\n \"className\": \"language-text\"\n }, \"handler\"), \"\\uFF0C\\u6267\\u884C\\u5B8C\\u540E\\u8FD4\\u56DE\\u503C\\u4FDD\\u5B58\\u5728\", mdx(\"code\", {\n parentName: \"li\",\n \"className\": \"language-text\"\n }, \"a0\"), \"\\u4E2D\\u3002\"), mdx(\"li\", {\n parentName: \"ol\"\n }, mdx(\"code\", {\n parentName: \"li\",\n \"className\": \"language-text\"\n }, \"usertrap\"), \"\\u672B\\u5C3E\\u8C03\\u7528\", mdx(\"code\", {\n parentName: \"li\",\n \"className\": \"language-text\"\n }, \"usertrapret\"), \"\\uFF0C\\u800C\", mdx(\"code\", {\n parentName: \"li\",\n \"className\": \"language-text\"\n }, \"usertrapret\"), \"\\u4F1A\\u8DF3\\u8F6C\\u5230\", mdx(\"code\", {\n parentName: \"li\",\n \"className\": \"language-text\"\n }, \"userret\"), \"\\uFF0C\\u8FD9\\u4E24\\u4E2A\\u8FC7\\u7A0B\\u4F1A\\u9006\\u5411\", mdx(\"code\", {\n parentName: \"li\",\n \"className\": \"language-text\"\n }, \"uservec\"), \"\\u548C\", mdx(\"code\", {\n parentName: \"li\",\n \"className\": \"language-text\"\n }, \"usertrap\"), \"\\u7684\\u64CD\\u4F5C\\u3002\")), mdx(\"h2\", null, \"trace\"), mdx(\"p\", null, \"\\u7531\\u4E8E\\u524D\\u9762\\u5DF2\\u7ECF\\u5206\\u6790\\u8FC7\\u8C03\\u7528\\u7CFB\\u7EDF\\u8C03\\u7528\\u7684\\u8FC7\\u7A0B\\u4E86\\uFF0C\\u4F46\\u662F\\u6DFB\\u52A0\\u4E00\\u4E2A\\u7CFB\\u7EDF\\u8C03\\u7528\\u8FD8\\u662F\\u6709\\u6240\\u4E0D\\u540C\\u7684\\uFF0C\\u6211\\u4EEC\\u8981\\u8FDB\\u884C\\u4EE5\\u4E0B\\u6B65\\u9AA4\\uFF1A\"), mdx(\"ol\", null, mdx(\"li\", {\n parentName: \"ol\"\n }, \"\\u5728\", mdx(\"code\", {\n parentName: \"li\",\n \"className\": \"language-text\"\n }, \"kernel/syscall.h\"), \"\\u4E2D\\u8BBE\\u7F6E\\u7CFB\\u7EDF\\u8C03\\u7528\\u53F7\\uFF0C\\u5982\", mdx(\"code\", {\n parentName: \"li\",\n \"className\": \"language-text\"\n }, \"#define SYS_trace 22\")), mdx(\"li\", {\n parentName: \"ol\"\n }, \"\\u5728\", mdx(\"code\", {\n parentName: \"li\",\n \"className\": \"language-text\"\n }, \"kernel/syscall.c\"), \"\\u4E2D\\u7684\", mdx(\"code\", {\n parentName: \"li\",\n \"className\": \"language-text\"\n }, \"syscalls\"), \"\\u6570\\u7EC4\\u4E2D\\u8BBE\\u7F6E\\u5BF9\\u5E94\\u7684 handler \\u51FD\\u6570\\uFF0C\\u540C\\u65F6\\u9700\\u8981\\u5728\\u8BE5\\u6570\\u7EC4\\u7684\\u4E0A\\u65B9\\u52A0\\u5165\\u76F8\\u5173\\u7684\\u51FD\\u6570\\u58F0\\u660E\\uFF0C\\u5982\", mdx(\"code\", {\n parentName: \"li\",\n \"className\": \"language-text\"\n }, \"extern unit64 sys_trace(void);\")), mdx(\"li\", {\n parentName: \"ol\"\n }, \"\\u5728\", mdx(\"code\", {\n parentName: \"li\",\n \"className\": \"language-text\"\n }, \"kernel/sysproc.c\"), \"\\u4E2D\\u5B9E\\u73B0\\u5BF9\\u5E94\\u7684 handler \\u51FD\\u6570\\uFF0C\\u5982\", mdx(\"code\", {\n parentName: \"li\",\n \"className\": \"language-text\"\n }, \"sys_trace\"), \"\\u51FD\\u6570\"), mdx(\"li\", {\n parentName: \"ol\"\n }, \"\\u5728\", mdx(\"code\", {\n parentName: \"li\",\n \"className\": \"language-text\"\n }, \"user/user.h\"), \"\\u4E2D\\u6DFB\\u52A0\\u51FD\\u6570\\u58F0\\u660E\\uFF0C\\u5982\", mdx(\"code\", {\n parentName: \"li\",\n \"className\": \"language-text\"\n }, \"int trace(int);\")), mdx(\"li\", {\n parentName: \"ol\"\n }, \"\\u5728\", mdx(\"code\", {\n parentName: \"li\",\n \"className\": \"language-text\"\n }, \"user/usys.pl\"), \"\\u6DFB\\u52A0\\u5BF9\\u5E94\\u7684\", mdx(\"code\", {\n parentName: \"li\",\n \"className\": \"language-text\"\n }, \"entry\"), \"\\u5DF2\\u751F\\u6210\\u76F8\\u5E94\\u7CFB\\u7EDF\\u8C03\\u7528\\u7684\\u6C47\\u7F16\\uFF0C\\u5982\", mdx(\"code\", {\n parentName: \"li\",\n \"className\": \"language-text\"\n }, \"entry(\\\"trace\\\");\"))), mdx(\"p\", null, \"\\u6DFB\\u52A0\\u5B8C\\u6210\\u540E\\uFF0C\\u6211\\u4EEC\\u53EF\\u4EE5\\u5C31\\u9700\\u8981\\u5B9E\\u73B0\", mdx(\"code\", {\n parentName: \"p\",\n \"className\": \"language-text\"\n }, \"kernel/sysproc.c\"), \"\\u4E2D\", mdx(\"code\", {\n parentName: \"p\",\n \"className\": \"language-text\"\n }, \"sys_trace\"), \"\\u7684\\u5B9E\\u73B0\\u4E86\\u3002\"), mdx(\"p\", null, \"\\u9996\\u5148\\uFF0C\\u9898\\u76EE\\u8981\\u6C42\\u6211\\u4EEC\\u80FD\\u591F\\u901A\\u8FC7\", mdx(\"code\", {\n parentName: \"p\",\n \"className\": \"language-text\"\n }, \"trace\"), \"\\u7CFB\\u7EDF\\u8C03\\u7528\\u6765\\u8BBE\\u7F6E\\u54EA\\u4E9B\\u7CFB\\u7EDF\\u8C03\\u7528\\u4F1A\\u88AB\", mdx(\"code\", {\n parentName: \"p\",\n \"className\": \"language-text\"\n }, \"trace\"), \"\\uFF0C\\u800C\\u4E14\", mdx(\"code\", {\n parentName: \"p\",\n \"className\": \"language-text\"\n }, \"trace\"), \"\\u7684\\u53C2\\u6570\\u4E5F\\u5DF2\\u7ECF\\u63D0\\u793A\\u6211\\u4EEC\\u8981\\u7528\", mdx(\"code\", {\n parentName: \"p\",\n \"className\": \"language-text\"\n }, \"1 << SYS_*\"), \"\\u7684\\u65B9\\u5F0F\\u6765\\u8BBE\\u7F6E\", mdx(\"code\", {\n parentName: \"p\",\n \"className\": \"language-text\"\n }, \"mask\"), \"\\u4E86\\uFF0C\", mdx(\"code\", {\n parentName: \"p\",\n \"className\": \"language-text\"\n }, \"mask\"), \"\\u5E94\\u8BE5\\u7531\", mdx(\"code\", {\n parentName: \"p\",\n \"className\": \"language-text\"\n }, \"trace\"), \"\\u547D\\u4EE4\\u6765\\u8BBE\\u7F6E\\u3002\", mdx(\"code\", {\n parentName: \"p\",\n \"className\": \"language-text\"\n }, \"trace\"), \"\\u5E94\\u8BE5\\u662F\\u53EA\\u65F6\\u5BF9\\u67D0\\u4E2A\\u8FDB\\u7A0B\\u6709\\u6548\\u7684\\uFF0C\\u6240\\u4EE5\\u8FD9\\u4E2A\", mdx(\"code\", {\n parentName: \"p\",\n \"className\": \"language-text\"\n }, \"mask\"), 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\"data-language\": \"c\"\n }, mdx(\"pre\", {\n parentName: \"div\",\n \"className\": \"language-c\"\n }, mdx(\"code\", {\n parentName: \"pre\",\n \"className\": \"language-c\"\n }, \"uint64\\n\", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token function\"\n }, \"sys_trace\"), mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token punctuation\"\n }, \"(\"), mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token keyword\"\n }, \"void\"), mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token punctuation\"\n }, \")\"), \"\\n\", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token punctuation\"\n }, \"{\"), \"\\n \", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token keyword\"\n }, \"int\"), \" mask\", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token punctuation\"\n }, \";\"), \"\\n \", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token keyword\"\n }, \"if\"), \" \", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token punctuation\"\n }, \"(\"), mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token function\"\n }, \"argint\"), mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token punctuation\"\n }, \"(\"), mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token number\"\n }, \"0\"), mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token punctuation\"\n }, \",\"), \" \", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token operator\"\n }, \"&\"), \"mask\", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token punctuation\"\n }, \")\"), \" \", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token operator\"\n }, \"<\"), \" \", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token number\"\n }, \"0\"), mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token punctuation\"\n }, \")\"), \"\\n \", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token keyword\"\n }, \"return\"), \" \", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token operator\"\n }, \"-\"), mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token number\"\n }, \"1\"), mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token punctuation\"\n }, \";\"), \"\\n \", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token function\"\n }, \"myproc\"), mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token punctuation\"\n }, \"(\"), mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token punctuation\"\n }, \")\"), mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token operator\"\n }, \"->\"), \"tracemask \", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token operator\"\n }, \"=\"), \" mask\", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token punctuation\"\n }, \";\"), \"\\n \", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token keyword\"\n }, \"return\"), \" \", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token number\"\n }, \"0\"), mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token punctuation\"\n }, \";\"), \"\\n\", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token punctuation\"\n }, \"}\")))), mdx(\"p\", null, \"\\u4ECE\\u4E0A\\u9762\\u5173\\u4E8E\\u7CFB\\u7EDF\\u8C03\\u7528\\u7684\\u5206\\u6790\\u53EF\\u4EE5\\u77E5\\u9053\\uFF0C\\u6BCF\\u4E2A\\u7CFB\\u7EDF\\u8C03\\u7528\\u7684 handler \\u90FD\\u4F1A\\u7531\", mdx(\"code\", {\n parentName: \"p\",\n \"className\": \"language-text\"\n }, \"syscall\"), \"\\u6765\\u8C03\\u7528\\uFF0C\\u6240\\u4EE5\\u6211\\u4EEC\\u53EF\\u4EE5\\u5728\\u4FEE\\u6539\\u8FD9\\u4E2A\\u51FD\\u6570\\u6765\\u5B9E\\u73B0\\u6BCF\\u6B21\\u7CFB\\u7EDF\\u8C03\\u7528 handler \\u8FD4\\u56DE\\u540E\\u90FD\\u8F93\\u51FA\\u5BF9\\u5E94\\u7684\\u4FE1\\u606F\\u3002\", mdx(\"code\", {\n parentName: \"p\",\n \"className\": \"language-text\"\n }, \"pid\"), 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\"nproc\"), mdx(\"p\", null, \"\\u4ECE\", mdx(\"code\", {\n parentName: \"p\",\n \"className\": \"language-text\"\n }, \"kernel/proc.c\"), \"\\u53EF\\u4EE5\\u770B\\u51FA\\u6765\\u5185\\u6838\\u4E2D\\u53EF\\u7528\\u7684\", mdx(\"code\", {\n parentName: \"p\",\n \"className\": \"language-text\"\n }, \"struct proc\"), \"\\u662F\\u7531\\u4E00\\u4E2A\\u6570\\u7EC4\\u5B58\\u50A8\\u7684\\uFF0C\\u6211\\u4EEC\\u53EF\\u4EE5\\u7B80\\u5355\\u7684\\u904D\\u5386\\u8FD9\\u4E2A\\u6570\\u7EC4\\uFF0C\\u7136\\u540E\\u5224\\u65AD\\u6BCF\\u4E2A\\u5143\\u7D20\\u7684\\u72B6\\u6001\\u662F\\u5426\\u4E3A\", mdx(\"code\", {\n parentName: \"p\",\n \"className\": \"language-text\"\n }, \"UNUSED\"), \"\\uFF0C\\u7136\\u540E\\u8BA1\\u6570\\u5373\\u53EF\\u3002\\u4EE3\\u7801\\u5982\\u4E0B\\uFF1A\"), mdx(\"div\", {\n \"className\": \"gatsby-highlight\",\n \"data-language\": \"c\"\n }, mdx(\"pre\", {\n parentName: \"div\",\n \"className\": \"language-c\"\n }, mdx(\"code\", {\n parentName: \"pre\",\n \"className\": \"language-c\"\n }, \"uint64\\n\", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token function\"\n }, \"nproc\"), mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token punctuation\"\n }, \"(\"), mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token keyword\"\n }, \"void\"), mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token punctuation\"\n }, \")\"), \"\\n\", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token punctuation\"\n }, \"{\"), \"\\n uint64 n \", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token operator\"\n }, \"=\"), \" \", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token number\"\n }, \"0\"), mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token punctuation\"\n }, \";\"), \"\\n \", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token keyword\"\n }, \"struct\"), \" \", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token class-name\"\n }, \"proc\"), \" \", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token operator\"\n }, \"*\"), \"p\", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token punctuation\"\n }, \";\"), \"\\n \", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token keyword\"\n }, \"for\"), mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token punctuation\"\n }, \"(\"), \"p \", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token operator\"\n }, \"=\"), \" proc\", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token punctuation\"\n }, \";\"), \"p \", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token operator\"\n }, \"<\"), \" \", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token operator\"\n }, \"&\"), \"proc\", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token punctuation\"\n }, \"[\"), \"NPROC\", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token punctuation\"\n }, \"]\"), mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token punctuation\"\n }, \";\"), \" p\", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token operator\"\n }, \"++\"), mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token punctuation\"\n }, \")\"), \" \", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token punctuation\"\n }, \"{\"), \"\\n \", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token keyword\"\n }, \"if\"), \" \", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token punctuation\"\n }, \"(\"), \"p\", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token operator\"\n }, \"->\"), \"state \", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token operator\"\n }, \"!=\"), \" UNUSED\", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token punctuation\"\n }, \")\"), \"\\n n\", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token operator\"\n }, \"++\"), mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token punctuation\"\n }, \";\"), \"\\n \", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token punctuation\"\n }, \"}\"), \"\\n \", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token keyword\"\n }, \"return\"), \" n\", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token punctuation\"\n }, \";\"), \"\\n\", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token punctuation\"\n }, \"}\")))), mdx(\"h3\", null, \"copyout\"), mdx(\"p\", null, \"\\u7531\\u4E8E\", mdx(\"code\", {\n parentName: \"p\",\n \"className\": \"language-text\"\n }, \"sys_sysinfo\"), \"\\u7CFB\\u7EDF\\u8C03\\u7528\\u8BFB\\u5230\\u7684\\u5730\\u5740\\u662F\\u7528\\u6237\\u6001\\u7684\\u865A\\u62DF\\u5730\\u5740\\uFF0C\\u6240\\u4EE5\\u4E0D\\u80FD\\u5728\\u5185\\u6838\\u76F4\\u63A5\\u4F7F\\u7528\\uFF0C\", mdx(\"code\", {\n parentName: \"p\",\n \"className\": \"language-text\"\n }, \"copyout\"), \"\\u51FD\\u6570\\u6765\\u5C06\\u5185\\u5B58\\u4E2D\\u7684\\u6570\\u636E\\u62F7\\u8D1D\\u5230\\u7528\\u6237\\u6001\\u3002\\u4ECE\\u5B9E\\u9A8C\\u7ED9\\u51FA\\u7684\\u63D0\\u793A\\u53EF\\u4EE5\\u770B\\u51FA\\uFF0C\\u53EF\\u4EE5\\u4ECE\\u53C2\\u8003\", mdx(\"code\", {\n parentName: \"p\",\n \"className\": \"language-text\"\n }, \"sys_fstat\"), \"\\u548C\", mdx(\"code\", {\n parentName: \"p\",\n \"className\": \"language-text\"\n }, \"filestat\"), \"\\u6765\\u4F7F\\u7528\", mdx(\"code\", {\n parentName: \"p\",\n \"className\": \"language-text\"\n }, \"copyout\"), \"\\u3002\\u7531\\u4E8E\", mdx(\"code\", {\n parentName: \"p\",\n \"className\": \"language-text\"\n }, \"sys_fstat\"), \"\\u53EA\\u6D89\\u53CA\\u5230\\u8BFB\\u53D6\\u53C2\\u6570\\u548C\\u8C03\\u7528\", mdx(\"code\", {\n parentName: \"p\",\n \"className\": \"language-text\"\n }, \"filestat\"), \"\\uFF0C\\u6240\\u4EE5\\u8FD9\\u91CC\\u53EA\\u7ED9\\u51FA\", mdx(\"code\", {\n parentName: \"p\",\n \"className\": \"language-text\"\n }, \"filestat\"), \"\\u7684\\u4EE3\\u7801\\uFF0C\\u5B83\\u7684\\u7B2C\\u4E8C\\u4E2A\\u53C2\\u6570\\u5C31\\u662F\\u7528\\u6237\\u6001\\u7684\\u5730\\u5740\\u3002\"), mdx(\"div\", {\n \"className\": \"gatsby-highlight\",\n \"data-language\": \"c\"\n }, mdx(\"pre\", {\n parentName: \"div\",\n \"className\": \"language-c\"\n }, mdx(\"code\", {\n parentName: \"pre\",\n \"className\": \"language-c\"\n }, mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token comment\"\n }, \"// Get metadata about file f.\"), \"\\n\", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token comment\"\n }, \"// addr is a user virtual address, pointing to a struct stat.\"), \"\\n\", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token keyword\"\n }, \"int\"), \"\\n\", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token function\"\n }, \"filestat\"), mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token punctuation\"\n }, \"(\"), mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token keyword\"\n }, \"struct\"), \" \", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token class-name\"\n }, \"file\"), \" \", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token operator\"\n }, \"*\"), \"f\", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token punctuation\"\n }, \",\"), \" uint64 addr\", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token punctuation\"\n }, \")\"), \"\\n\", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token punctuation\"\n }, \"{\"), \"\\n \", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token keyword\"\n }, \"struct\"), \" \", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token class-name\"\n }, \"proc\"), \" \", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token operator\"\n }, \"*\"), \"p \", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token operator\"\n }, \"=\"), \" \", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token function\"\n }, \"myproc\"), mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token punctuation\"\n }, \"(\"), mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token punctuation\"\n }, \")\"), mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token punctuation\"\n }, \";\"), \"\\n \", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token keyword\"\n }, \"struct\"), \" \", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token class-name\"\n }, \"stat\"), \" st\", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token punctuation\"\n }, \";\"), \"\\n\\n \", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token keyword\"\n }, \"if\"), mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token punctuation\"\n }, \"(\"), \"f\", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token operator\"\n }, \"->\"), \"type \", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token operator\"\n }, \"==\"), \" FD_INODE \", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token operator\"\n }, \"||\"), \" f\", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token operator\"\n }, \"->\"), \"type \", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token operator\"\n }, \"==\"), \" FD_DEVICE\", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token punctuation\"\n }, \")\"), mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token punctuation\"\n }, \"{\"), \"\\n \", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token function\"\n }, \"ilock\"), mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token punctuation\"\n }, \"(\"), \"f\", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token operator\"\n }, \"->\"), \"ip\", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token punctuation\"\n }, \")\"), mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token punctuation\"\n }, \";\"), \"\\n \", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token function\"\n }, \"stati\"), mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token punctuation\"\n }, \"(\"), \"f\", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token operator\"\n }, \"->\"), \"ip\", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token punctuation\"\n }, \",\"), \" \", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token operator\"\n }, \"&\"), \"st\", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token punctuation\"\n }, \")\"), mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token punctuation\"\n }, \";\"), \"\\n \", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token function\"\n }, \"iunlock\"), mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token punctuation\"\n }, \"(\"), \"f\", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token operator\"\n }, \"->\"), \"ip\", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token punctuation\"\n }, \")\"), mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token punctuation\"\n }, \";\"), \"\\n \", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token keyword\"\n }, \"if\"), mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token punctuation\"\n }, \"(\"), mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token function\"\n }, \"copyout\"), mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token punctuation\"\n }, \"(\"), \"p\", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token operator\"\n }, \"->\"), \"pagetable\", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token punctuation\"\n }, \",\"), \" addr\", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token punctuation\"\n }, \",\"), \" \", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token punctuation\"\n }, \"(\"), mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token keyword\"\n }, \"char\"), \" \", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token operator\"\n }, \"*\"), mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token punctuation\"\n }, \")\"), mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token operator\"\n }, \"&\"), \"st\", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token punctuation\"\n }, \",\"), \" \", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token keyword\"\n }, \"sizeof\"), mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token punctuation\"\n }, \"(\"), \"st\", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token punctuation\"\n }, \")\"), mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token punctuation\"\n }, \")\"), \" \", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token operator\"\n }, \"<\"), \" \", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token number\"\n }, \"0\"), mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token punctuation\"\n }, \")\"), \"\\n \", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token keyword\"\n }, \"return\"), \" \", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token operator\"\n }, \"-\"), mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token number\"\n }, \"1\"), mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token punctuation\"\n }, \";\"), \"\\n \", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token keyword\"\n }, \"return\"), \" \", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token number\"\n }, \"0\"), mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token punctuation\"\n }, \";\"), \"\\n \", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token punctuation\"\n }, \"}\"), \"\\n \", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token keyword\"\n }, \"return\"), \" \", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token operator\"\n }, \"-\"), mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token number\"\n }, \"1\"), mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token punctuation\"\n }, \";\"), \"\\n\", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token punctuation\"\n }, \"}\")))), mdx(\"p\", null, \"\\u4E0A\\u9762\\u7684\\u4EE3\\u7801\\u5173\\u952E\\u5728\\u4E8E\", mdx(\"code\", {\n parentName: \"p\",\n \"className\": \"language-text\"\n }, \"copyout(p->pagetable, add, (char*)&st, sizeof(st))\"), \"\\uFF0C\\u8FD9\\u91CC\\u53EF\\u4EE5\\u770B\\u51FA\", mdx(\"code\", {\n parentName: \"p\",\n \"className\": \"language-text\"\n }, \"copyout\"), \"\\u662F\\u901A\\u8FC7\\u8FDB\\u7A0B\\u7684\\u9875\\u8868\\u6765\\u8BA1\\u7B97\\u5B9E\\u5730\\u5740\\u7684\\u4F4D\\u7F6E\\u3002\"), mdx(\"p\", null, \"\\u56E0\\u6B64\\uFF0C\\u6211\\u4EEC\\u53EF\\u4EE5\\u5199\\u51FA\", mdx(\"code\", {\n parentName: \"p\",\n \"className\": \"language-text\"\n }, \"sys_sysinfo\"), \"\\u7684\\u4EE3\\u7801\\u5982\\u4E0B\\uFF1A\"), mdx(\"div\", {\n \"className\": \"gatsby-highlight\",\n \"data-language\": \"c\"\n }, mdx(\"pre\", {\n parentName: \"div\",\n \"className\": \"language-c\"\n }, mdx(\"code\", {\n parentName: \"pre\",\n \"className\": \"language-c\"\n }, \"uint64\\n\", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token function\"\n }, \"sys_sysinfo\"), mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token punctuation\"\n }, \"(\"), mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token keyword\"\n }, \"void\"), mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token punctuation\"\n }, \")\"), \"\\n\", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token punctuation\"\n }, \"{\"), \"\\n \", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token keyword\"\n }, \"struct\"), \" \", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token class-name\"\n }, \"sysinfo\"), \" info\", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token punctuation\"\n }, \";\"), \"\\n \", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token keyword\"\n }, \"struct\"), \" \", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token class-name\"\n }, \"proc\"), \" \", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token operator\"\n }, \"*\"), \"p \", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token operator\"\n }, \"=\"), \" \", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token function\"\n }, \"myproc\"), mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token punctuation\"\n }, \"(\"), mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token punctuation\"\n }, \")\"), mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token punctuation\"\n }, \";\"), \"\\n uint64 pinfo\", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token punctuation\"\n }, \";\"), \"\\n\\n \", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token keyword\"\n }, \"if\"), \" \", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token punctuation\"\n }, \"(\"), mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token function\"\n }, \"argaddr\"), mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token punctuation\"\n }, \"(\"), mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token number\"\n }, \"0\"), mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token punctuation\"\n }, \",\"), \" \", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token operator\"\n }, \"&\"), \"pinfo\", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token punctuation\"\n }, \")\"), \" \", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token operator\"\n }, \"<\"), \" \", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token 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\"\\n \", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token keyword\"\n }, \"return\"), \" \", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token number\"\n }, \"0\"), mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token punctuation\"\n }, \";\"), \"\\n\", mdx(\"span\", {\n parentName: \"code\",\n \"className\": \"token punctuation\"\n }, \"}\"), \"\\n\"))));\n}\n;\nMDXContent.isMDXComponent = true;","excerpt":"6.S081 的第二个实验，system calls，虽然是好久之前做的了，但是一直没把它放到博客里面。今天略无聊，就弄了一下。BTW，第三个实验我到现在都还没开始呢。 system call…","frontmatter":{"title":"6.S081 lab2 system calls","tags":["OS","6.S081","xv6","RISC-V"],"date":"2020-12-14T15:20:55.000Z","categories":["Blog"]},"fields":{"slug":"/posts/2020/12/14/6s081-lab2-system-calls/"}}},"pageContext":{"slug":"/posts/2020/12/14/6s081-lab2-system-calls/"}}, "staticQueryHashes": ["163584858","1656825683","63159454"]}