{"id":45570,"date":"2023-02-22T23:09:06","date_gmt":"2023-02-06T16:25:31","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/45570-2\/"},"modified":"2024-04-29T15:50:34","modified_gmt":"2024-04-29T07:50:34","slug":"45570-2","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/45570-2\/","title":{"rendered":""},"content":{"rendered":"<h1>\u306f\u3058\u3081\u306b<\/h1>\n<p>\u3053\u306e\u8a18\u4e8b\u306f Rust\u305d\u306e2 Advent Calendar 2019 15\u65e5\u76ee \u306e\u8a18\u4e8b\u3067\u3059\u3002\u5c0f\u30cd\u30bf\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u4ee5\u524d\u3001macOS \u4e0a\u306e Rust \u3067\u3057\u3063\u304b\u308a\u3068\u30b9\u30bf\u30c6\u30a3\u30c3\u30af\u30ea\u30f3\u30af\u3057\u305f\u6642\u3001\u3069\u308c\u3060\u3051\u30d0\u30a4\u30ca\u30ea\u304c\u30b9\u30ea\u30e0\u5316\u3067\u304d\u308b\u304b\u306b\u30c8\u30e9\u30a4\u3057\u3066\u307f\u307e\u3057\u305f\u304c\u3001\u56fa\u5b9a\u6587\u5b57\u5217\u3068\u30b7\u30b9\u30c6\u30e0\u30b3\u30fc\u30eb\uff12\u767a\u3060\u3051\u306a\u306e\u306b\u30014,096\u30d0\u30a4\u30c8\u3092\u6d88\u8cbb\u3057\u3066\u3057\u307e\u3044\u3001\u3044\u307e\u3044\u3061\u4e0d\u6e80\u304c\u6b8b\u308a\u307e\u3057\u305f\u3002\u3060\u3063\u3066\u3001&#8221;Hello, World!\\n\\0&#8243; \u306715\u30d0\u30a4\u30c8\u3001\u30b7\u30b9\u30c6\u30e0\u30b3\u30fc\u30eb\uff12\u767a\u3067\uff12\u30ef\u30fc\u30c9\u3001\u8a0850\u30d0\u30a4\u30c8\u3050\u3089\u3044\u3001\u30ea\u30ed\u30b1\u30fc\u30b7\u30e7\u30f3\u60c5\u5831\u304c\u8272\u3005\u3064\u3044\u3066\u3082\u3001\uff13\u6841\u30d0\u30a4\u30c8\u306b\u307e\u3067\u3044\u304b\u305a\u3068\u3082\u3002\u3082\u3061\u308d\u3093\u3001PC \u3084 Mac \u3067\u306f\u30e1\u30a4\u30f3\u30e1\u30e2\u30ea\u304c GB \u304c\u5f53\u305f\u308a\u524d\u3067\u3059\u304b\u3089\u3001\u305d\u3093\u306a\u3053\u3068\u3092\u6c17\u306b\u3057\u3066\u3082\u3057\u3087\u3046\u304c\u306a\u3044\u306e\u3067\u3001\u30bf\u30fc\u30b2\u30c3\u30c8\u3092\u5909\u3048\u3066\u307f\u308b\u3053\u3068\u306b\u3057\u307e\u3057\u305f\u3002\u3051\u308c\u3069\u3082\u3001\u7d44\u8fbc\u7cfb\u306f\u3084\u3063\u3066\u3044\u308b\u4eba\u304c\u591a\u305d\u3046\u3060\u3057&#8230;<\/p>\n<p>\u826f\u3044\u30bf\u30fc\u30b2\u30c3\u30c8\u306f\u306a\u3044\u304b\u306a\u3041\u3068 github \u4e0a\u3092\u3077\u3089\u3077\u3089\u3057\u3066\u3044\u305f\u3089\u3001Serentty \u3055\u3093\u304c Rust \u3067\u521d\u4ee3x86\u7cfbCPU 8086 \u4e0a\u306e DOS\u3001\u3064\u307e\u308a\u3001MS-DOS \/ PC-DOS \u3092\u30bf\u30fc\u30b2\u30c3\u30c8\u306b\u3057\u3066\u3044\u308b\u306e\u3092\u898b\u3064\u3051\u3001\u300c\u3053\u308c\u3060\u3063\u300d\u3068\u3044\u3046\u3053\u3068\u3067\u3001\u3054\u7d39\u4ecb\u3057\u305f\u3044\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n<p>\u3068\u3044\u3046\u3053\u3068\u3067\u3001DOS \u3068\u3044\u3063\u3066\u3082 Denial of Service \u653b\u6483\u3067\u306f\u306a\u304f\u3001Disk Operating System \u3092\u653b\u3081\u3066\u307f\u308b\u305c\u3001\u3063\u3066\u3044\u3046\u304a\u8a71\u3067\u3059\u3002\u671f\u5f85\u3057\u3066\u6765\u3066\u304f\u3060\u3055\u3063\u305f\u65b9\u3001\u3054\u3081\u3093\u306a\u3055\u3044\u3002<\/p>\n<p>\u306a\u304a\u3001\u4ee5\u4e0b\u306e\u8a18\u4e8b\u304c\u53e4\u304f\u306a\u3063\u3066\u304d\u305f\u306e\u3067\u3001\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8\u3057\u307e\u3057\u305f\u306e\u3067\u3001\u305c\u3072\u3068\u3082\u305d\u3061\u3089\u3092\u3054\u89a7\u304f\u3060\u3055\u3044\u3002\uff082020\/5\/5\u8ffd\u8a18\uff09<\/p>\n<h1>\u30af\u30ed\u30b9\u30b3\u30f3\u30d1\u30a4\u30eb\u74b0\u5883\u306e\u6e96\u5099<\/h1>\n<p>\u30db\u30b9\u30c8\u74b0\u5883\u306f\u3053\u3093\u306a\u3068\u3053\u308d\u3067\u3059\u3002<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">macOS 10.14.6 (18G2022)<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">rustc 1.41.0-nightly (3eeb8d4f2 2019-12-12)<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">cargo 1.41.0-nightly (626f0f40e 2019-12-03)<\/ul>\n<p>\u305d\u3057\u3066\u3001rust-src \u3068 cargo-xbuild \u3092\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code>$ rustup component add rust-src\r\n$ cargo install cargo-xbuild\r\n<\/code><\/pre>\n<p>\u6b21\u306b\u3001x86 \u7528\u306e as, gcc, ld \u3082\u7528\u610f\u3057\u307e\u3059\u3002\u5e74\u306e\u702c\u3067\u3059\u3057\u3001\u3055\u304f\u3063\u3068 Homebrew \u304c\u697d\u30c1\u30f3\u3067\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code>$ brew install x86_64-elf-gcc\r\n<\/code><\/pre>\n<p>\u3053\u308c\u3067\u3001\u4e00\u63c3\u3044\u306e\u74b0\u5883\u304c\u51fa\u6765\u4e0a\u304c\u308a\u307e\u3059\u3002<\/p>\n<h1>DOS \u74b0\u5883\u306e\u6e96\u5099<\/h1>\n<p>MS-DOS \u306f\u30aa\u30fc\u30d7\u30f3\u30bd\u30fc\u30b9\u3068\u3057\u3066 GitHub \u3067\u516c\u958b\u3055\u308c\u3066\u3044\u307e\u3059\u304c\u3001\u305d\u308c\u304b\u3089\u30d6\u30fc\u30c8\u3067\u304d\u308b\u30b7\u30b9\u30c6\u30e0\u3092\u69cb\u7bc9\u3059\u308b\u306e\u306f\u5927\u5909\u305d\u3046\u3067\u3059\u3002VirtualBox \u306e\u4e0a\u306b FreeDOS \u3092\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3059\u308b\u306e\u3082\u826f\u3044\u306e\u3067\u3059\u304c\u3001\u3053\u3053\u306f macOS \u306e Hypervisor framework \u3092\u4f7f\u3063\u305f C++ \u3067\u66f8\u304b\u308c\u305f\u30b3\u30f3\u30d1\u30af\u30c8\u306a\u30a8\u30df\u30e5\u30ec\u30fc\u30bf\u3092\u90e8\u5206\u7684\u306b Rust \u306b\u79fb\u690d\u3057\u3066\u307f\u307e\u3057\u305f\u306e\u3067\u3001\u305d\u308c\u3092\u4f7f\u3063\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code>$ cargo install --git https:\/\/github.com\/moriai\/hvdos.rs.git\r\n<\/code><\/pre>\n<h1>Rust \u3067\u66f8\u3044\u305f DOS \u30a2\u30d7\u30ea<\/h1>\n<p>Rust \u3067\u3069\u3053\u307e\u3067\u5bfe\u5fdc\u3067\u304d\u308b\u306e\u304b\u306f\u3088\u304f\u308f\u304b\u308a\u307e\u305b\u3093\u304c\u3001\u307e\u305a\u306f &#8220;Hello, World!&#8221; \u3092\u66f8\u3044\u3066\u307f\u307e\u3057\u3087\u3046\u3002\u3053\u3053\u3067\u306f Serentty \u3055\u3093\u306e Rusty DOS \u3092\u53c2\u8003\u306b\u3057\u306a\u304c\u3089\u66f8\u3044\u3066\u307f\u307e\u3059\u3002<\/p>\n<p>\u307e\u305a\u5fc5\u8981\u306a\u306e\u306f\u30bf\u30fc\u30b2\u30c3\u30c8\u306e\u5b9a\u7fa9\u3067\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"p\">{<\/span>\r\n    <span class=\"nl\">\"arch\"<\/span><span class=\"p\">:<\/span> <span class=\"s2\">\"x86\"<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"nl\">\"cpu\"<\/span><span class=\"p\">:<\/span> <span class=\"s2\">\"i386\"<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"nl\">\"data-layout\"<\/span><span class=\"p\">:<\/span> <span class=\"s2\">\"e-m:e-p:32:32-f64:32:64-f80:32-n8:16:32-S128\"<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"nl\">\"dynamic-linking\"<\/span><span class=\"p\">:<\/span> <span class=\"kc\">false<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"nl\">\"executables\"<\/span><span class=\"p\">:<\/span> <span class=\"kc\">true<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"nl\">\"exe-suffix\"<\/span><span class=\"p\">:<\/span> <span class=\"s2\">\".com\"<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"nl\">\"linker-flavor\"<\/span><span class=\"p\">:<\/span> <span class=\"s2\">\"gcc\"<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"nl\">\"linker\"<\/span><span class=\"p\">:<\/span> <span class=\"s2\">\"x86_64-elf-gcc\"<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"nl\">\"linker-is-gnu\"<\/span><span class=\"p\">:<\/span> <span class=\"kc\">true<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"nl\">\"llvm-target\"<\/span><span class=\"p\">:<\/span> <span class=\"s2\">\"i386-unknown-none-code16\"<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"nl\">\"max-atomic-width\"<\/span><span class=\"p\">:<\/span> <span class=\"mi\">64<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"nl\">\"position-independent-executables\"<\/span><span class=\"p\">:<\/span> <span class=\"kc\">false<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"nl\">\"disable-redzone\"<\/span><span class=\"p\">:<\/span> <span class=\"kc\">true<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"nl\">\"pre-link-args\"<\/span><span class=\"p\">:<\/span> <span class=\"p\">{<\/span>\r\n      <span class=\"nl\">\"gcc\"<\/span><span class=\"p\">:<\/span> <span class=\"p\">[<\/span>\r\n        <span class=\"s2\">\"-Wl,--as-needed\"<\/span><span class=\"p\">,<\/span>\r\n        <span class=\"s2\">\"-Wl,-z,noexecstack\"<\/span><span class=\"p\">,<\/span>\r\n        <span class=\"s2\">\"-Wl,--gc-sections\"<\/span><span class=\"p\">,<\/span>\r\n        <span class=\"s2\">\"-Wl,-melf_i386\"<\/span><span class=\"p\">,<\/span>\r\n        <span class=\"s2\">\"-m16\"<\/span><span class=\"p\">,<\/span>\r\n        <span class=\"s2\">\"-nostdlib\"<\/span><span class=\"p\">,<\/span>\r\n        <span class=\"s2\">\"-march=i386\"<\/span><span class=\"p\">,<\/span>\r\n        <span class=\"s2\">\"-ffreestanding\"<\/span><span class=\"p\">,<\/span>\r\n        <span class=\"s2\">\"-fno-pie\"<\/span><span class=\"p\">,<\/span>\r\n        <span class=\"s2\">\"-Tcom.ld\"<\/span>\r\n      <span class=\"p\">]<\/span>\r\n    <span class=\"p\">},<\/span>\r\n    <span class=\"nl\">\"pre-link-objects-exe-crt\"<\/span><span class=\"p\">:<\/span> <span class=\"p\">[<\/span>\r\n      <span class=\"s2\">\"startup.o\"<\/span>\r\n    <span class=\"p\">],<\/span>\r\n    <span class=\"nl\">\"relro-level\"<\/span><span class=\"p\">:<\/span> <span class=\"s2\">\"full\"<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"nl\">\"target-c-int-width\"<\/span><span class=\"p\">:<\/span> <span class=\"s2\">\"32\"<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"nl\">\"target-endian\"<\/span><span class=\"p\">:<\/span> <span class=\"s2\">\"little\"<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"nl\">\"target-pointer-width\"<\/span><span class=\"p\">:<\/span> <span class=\"s2\">\"32\"<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"nl\">\"os\"<\/span><span class=\"p\">:<\/span> <span class=\"s2\">\"none\"<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"nl\">\"vendor\"<\/span><span class=\"p\">:<\/span> <span class=\"s2\">\"unknown\"<\/span>\r\n  <span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u57fa\u672c\u306f Serentty \u3055\u3093\u306e\u3082\u306e\u3067\u3059\u304c\u3001linker \u3068\u3057\u3066 x86_64-elf-gcc \u3092\u6307\u5b9a\u3059\u308b\u3068\u3053\u308d\u304c\u30dd\u30a4\u30f3\u30c8\u3067\u3059\u3002linker script \u306f com.ld \u3092\u6307\u5b9a\u3057\u3001\u305d\u306e\u4e2d\u8eab\u306f Serentty \u3055\u3093\u306e\u3082\u306e\u3092\u305d\u306e\u307e\u307e\u4f7f\u3044\u307e\u3059\u3002\u30bf\u30fc\u30b2\u30c3\u30c8\u30d5\u30a1\u30a4\u30eb\u540d\u3092 dos.json \u3068\u3057\u307e\u3057\u305f\u306e\u3067\u3001.cargo\/config \u306b\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u66f8\u3044\u3066\u304a\u304d\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code>[build]\r\ntarget = \"dos.json\"\r\n\r\n[target.dos]\r\nrunner = \"hvdos\"\r\n<\/code><\/pre>\n<p>\u6b21\u306b\u3001\u30b9\u30bf\u30fc\u30c8\u30a2\u30c3\u30d7\u30d7\u30ed\u30b0\u30e9\u30e0 startup.c \u306e\u30b3\u30f3\u30d1\u30a4\u30eb\u3068\u30ea\u30f3\u30af\u3092 build.rs \u306b\u8a18\u8ff0\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">use<\/span> <span class=\"nn\">std<\/span><span class=\"p\">::<\/span><span class=\"n\">env<\/span><span class=\"p\">;<\/span>\r\n<span class=\"k\">use<\/span> <span class=\"nn\">std<\/span><span class=\"p\">::<\/span><span class=\"nn\">process<\/span><span class=\"p\">::<\/span><span class=\"n\">Command<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"k\">fn<\/span> <span class=\"nf\">main<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"n\">out_dir<\/span> <span class=\"o\">=<\/span> <span class=\"nn\">env<\/span><span class=\"p\">::<\/span><span class=\"nf\">var<\/span><span class=\"p\">(<\/span><span class=\"s\">\"OUT_DIR\"<\/span><span class=\"p\">)<\/span><span class=\"nf\">.unwrap<\/span><span class=\"p\">();<\/span>\r\n\r\n    <span class=\"nn\">Command<\/span><span class=\"p\">::<\/span><span class=\"nf\">new<\/span><span class=\"p\">(<\/span><span class=\"s\">\"x86_64-elf-gcc\"<\/span><span class=\"p\">)<\/span>\r\n        <span class=\"nf\">.args<\/span><span class=\"p\">(<\/span><span class=\"o\">&amp;<\/span><span class=\"p\">[<\/span><span class=\"s\">\"src\/startup.c\"<\/span><span class=\"p\">,<\/span> <span class=\"s\">\"-c\"<\/span><span class=\"p\">,<\/span> <span class=\"s\">\"-march=i386\"<\/span><span class=\"p\">,<\/span> <span class=\"s\">\"-m16\"<\/span><span class=\"p\">,<\/span> <span class=\"s\">\"-ffreestanding\"<\/span><span class=\"p\">,<\/span> <span class=\"s\">\"-fno-pie\"<\/span><span class=\"p\">,<\/span> <span class=\"s\">\"-o\"<\/span><span class=\"p\">])<\/span>\r\n        <span class=\"nf\">.arg<\/span><span class=\"p\">(<\/span><span class=\"o\">&amp;<\/span><span class=\"nd\">format!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"{}\/startup.o\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">out_dir<\/span><span class=\"p\">))<\/span>\r\n        <span class=\"nf\">.status<\/span><span class=\"p\">()<\/span><span class=\"nf\">.unwrap<\/span><span class=\"p\">();<\/span>\r\n\r\n    <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"cargo:rustc-link-search=native={}\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">out_dir<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>cc \u3067\u306f\u306a\u304f x86_64-elf-gcc \u3067\u3001i386 \u306e 16bit \u30e2\u30fc\u30c9\u3067\u30b3\u30f3\u30d1\u30a4\u30eb\u3057\u3001startup.o \u304c\u66f8\u304d\u51fa\u3055\u308c\u308b\u5834\u6240\u3092 cargo:rustc-link-search= \u3092\u4f7f\u3063\u3066 cargo \u306b\u6559\u3048\u3066\u3042\u3052\u308b\u3068\u3053\u308d\u304c\u30dd\u30a4\u30f3\u30c81\u3067\u3059\u3002<\/p>\n<p>\u3042\u3068\u306f\u9811\u5f35\u3063\u3066\u3001main.rs \u3092\u66f8\u304d\u307e\u3059\u3002Rust \u3068\u3044\u3046\u3088\u308a\u3082\u3001\u307b\u3068\u3093\u3069\u30a2\u30bb\u30f3\u30d6\u30e9\u3067\u3059\u306d\u3002 ?<\/p>\n<pre class=\"post-pre\"><code><span class=\"nd\">#![feature(proc_macro_hygiene,<\/span> <span class=\"nd\">asm)]<\/span>\r\n<span class=\"nd\">#![no_main]<\/span>\r\n<span class=\"nd\">#![no_std]<\/span>\r\n\r\n<span class=\"k\">use<\/span> <span class=\"nn\">rusty_asm<\/span><span class=\"p\">::<\/span><span class=\"n\">rusty_asm<\/span><span class=\"p\">;<\/span>\r\n<span class=\"k\">use<\/span> <span class=\"nn\">core<\/span><span class=\"p\">::<\/span><span class=\"nn\">panic<\/span><span class=\"p\">::<\/span><span class=\"n\">PanicInfo<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"nd\">#[panic_handler]<\/span>\r\n<span class=\"k\">fn<\/span> <span class=\"nf\">panic<\/span><span class=\"p\">(<\/span><span class=\"mi\">_<\/span><span class=\"n\">info<\/span><span class=\"p\">:<\/span> <span class=\"o\">&amp;<\/span><span class=\"n\">PanicInfo<\/span><span class=\"p\">)<\/span> <span class=\"k\">-&gt;<\/span> <span class=\"o\">!<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">loop<\/span> <span class=\"p\">{}<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"k\">fn<\/span> <span class=\"nf\">write<\/span><span class=\"p\">(<\/span><span class=\"n\">fd<\/span><span class=\"p\">:<\/span> <span class=\"nb\">usize<\/span><span class=\"p\">,<\/span> <span class=\"n\">buf<\/span><span class=\"p\">:<\/span> <span class=\"o\">*<\/span><span class=\"k\">const<\/span> <span class=\"nb\">u8<\/span><span class=\"p\">,<\/span> <span class=\"n\">len<\/span><span class=\"p\">:<\/span> <span class=\"nb\">usize<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">unsafe<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"nd\">rusty_asm!<\/span> <span class=\"p\">{<\/span>\r\n            <span class=\"k\">let<\/span> <span class=\"n\">buf<\/span><span class=\"p\">:<\/span> <span class=\"nf\">in<\/span><span class=\"p\">(<\/span><span class=\"s\">\"{dx}\"<\/span><span class=\"p\">)<\/span> <span class=\"o\">=<\/span> <span class=\"n\">buf<\/span><span class=\"p\">;<\/span>\r\n            <span class=\"k\">let<\/span> <span class=\"n\">len<\/span><span class=\"p\">:<\/span> <span class=\"nf\">in<\/span><span class=\"p\">(<\/span><span class=\"s\">\"{cx}\"<\/span><span class=\"p\">)<\/span> <span class=\"o\">=<\/span> <span class=\"n\">len<\/span><span class=\"p\">;<\/span>\r\n            <span class=\"k\">let<\/span> <span class=\"n\">fd<\/span><span class=\"p\">:<\/span> <span class=\"nf\">in<\/span><span class=\"p\">(<\/span><span class=\"s\">\"{bx}\"<\/span><span class=\"p\">)<\/span> <span class=\"o\">=<\/span> <span class=\"n\">fd<\/span><span class=\"p\">;<\/span>\r\n            <span class=\"nf\">clobber<\/span><span class=\"p\">(<\/span><span class=\"s\">\"ah\"<\/span><span class=\"p\">);<\/span>\r\n            <span class=\"nf\">clobber<\/span><span class=\"p\">(<\/span><span class=\"s\">\"al\"<\/span><span class=\"p\">);<\/span>\r\n            <span class=\"nf\">asm<\/span><span class=\"p\">(<\/span><span class=\"s\">\"volatile\"<\/span><span class=\"p\">,<\/span> <span class=\"s\">\"intel\"<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n                <span class=\"s\">\"mov ah, 40h\r\n                 int 21h\"<\/span>\r\n            <span class=\"p\">}<\/span>\r\n        <span class=\"p\">}<\/span>\r\n    <span class=\"p\">}<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"k\">fn<\/span> <span class=\"nf\">exit<\/span><span class=\"p\">()<\/span> <span class=\"k\">-&gt;<\/span> <span class=\"o\">!<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">unsafe<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"nd\">rusty_asm!<\/span> <span class=\"p\">{<\/span>\r\n            <span class=\"nf\">asm<\/span><span class=\"p\">(<\/span><span class=\"s\">\"volatile\"<\/span><span class=\"p\">,<\/span> <span class=\"s\">\"intel\"<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n                <span class=\"s\">\"mov ah, 4ch\r\n                 int 21h\"<\/span>\r\n            <span class=\"p\">}<\/span>\r\n        <span class=\"p\">}<\/span>\r\n    <span class=\"p\">}<\/span>\r\n    <span class=\"k\">loop<\/span> <span class=\"p\">{}<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"nd\">#[no_mangle]<\/span>\r\n<span class=\"k\">pub<\/span> <span class=\"k\">extern<\/span> <span class=\"s\">\"C\"<\/span> <span class=\"k\">fn<\/span> <span class=\"mi\">_<\/span><span class=\"nf\">start<\/span><span class=\"p\">()<\/span> <span class=\"k\">-&gt;<\/span> <span class=\"o\">!<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"n\">msg<\/span> <span class=\"o\">=<\/span> <span class=\"s\">\"Hello, world!<\/span><span class=\"se\">\\r\\n<\/span><span class=\"s\">\"<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"n\">buf<\/span> <span class=\"o\">=<\/span> <span class=\"n\">msg<\/span><span class=\"nf\">.as_ptr<\/span><span class=\"p\">();<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"n\">len<\/span> <span class=\"o\">=<\/span> <span class=\"n\">msg<\/span><span class=\"nf\">.len<\/span><span class=\"p\">();<\/span>\r\n\r\n    <span class=\"nf\">write<\/span><span class=\"p\">(<\/span><span class=\"mi\">1<\/span><span class=\"p\">,<\/span> <span class=\"n\">buf<\/span><span class=\"p\">,<\/span> <span class=\"n\">len<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"nf\">exit<\/span><span class=\"p\">();<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u524d\u56de\u306e\u30d7\u30ed\u30b0\u30e9\u30e0\u3068\u57fa\u672c\u7684\u306b\u306f\u5909\u308f\u308a\u307e\u305b\u3093\u3002macOS \u306e\u30b7\u30b9\u30c6\u30e0\u30b3\u30fc\u30eb\u547c\u3073\u51fa\u3057\u3092 MS-DOS \u306e\u30b7\u30b9\u30c6\u30e0\u30b3\u30fc\u30eb\u547c\u3073\u51fa\u3057\u306b\u5909\u3048\u305f\u3060\u3051\u3067\u3059\u306d\u3002 ?<\/p>\n<p>Cargo.toml \u306a\u3069\u3092\u4fee\u6b63\u3057\u3066\u3001\u30d3\u30eb\u30c9\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code>$ RUSTFLAGS=\"-C opt-level=z -C relocation-model=static\" cargo xbuild --release\r\n<\/code><\/pre>\n<p>\u3067\u306f\u3001run!<\/p>\n<pre class=\"post-pre\"><code>$ hvdos target\/dos\/release\/hello.com\r\nHello, world!\r\n<\/code><\/pre>\n<p>\u7121\u4e8b\u306b\u52d5\u304d\u307e\u3057\u305f\u3002 ??<\/p>\n<h1>\u7d50\u679c<\/h1>\n<p>\u524d\u56de\u306e\u7d50\u679c\u306b\u4eca\u56de\u306e\u7d50\u679c\u3092\u8ffd\u8a18\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n<div>\n<div class=\"post-table\">\nunstrippedstrippedRust (-C opt-level=3)271,832 bytes175,328 bytesRust (-C opt-level=3 -C prefer-dynamic)9,048 bytes8,656 bytes<b>Rust (-C opt-level=3, no_std)<\/b><b>4,216 bytes<\/b><b>4,096 bytes<\/b>C (-Oz)8,432 bytes8,440 bytes<b>Rust for MS-DOS (-C opt-level=s)<\/b><br \/>\n<b>56 bytes<\/b><\/div>\n<\/div>\n<p>56\u30d0\u30a4\u30c8\u3068\u3044\u3063\u3066\u3082\u3001\u307b\u3068\u3093\u3069\u30a2\u30bb\u30f3\u30d6\u30e9\u3067\u3059\u304b\u3089\u5f53\u7136\u3067\u3057\u3087\u30462\u3002<\/p>\n<p>\u4eca\u56de\u306e\u30bd\u30fc\u30b9\u30b3\u30fc\u30c9\u306f GitHub \u306b\u8ffd\u52a0\u3057\u3066\u304a\u304d\u307e\u3057\u305f\u3002<\/p>\n<h1>\u304a\u308f\u308a\u306b<\/h1>\n<p>\u4e9b\u7d30\u306a\u3053\u3068\u3092\u3061\u3087\u3063\u3068\u6df1\u304f\u6398\u3063\u3066\u3057\u307e\u3044\u307e\u3057\u305f\u304c\u3001\u3053\u3046\u3044\u3046\u3053\u3068\u3092\u3055\u3089\u3063\u3068\u8a66\u305b\u308b\u306e\u3063\u3066\u7d20\u6674\u3089\u3057\u3044\u3067\u3059\u306d\u3002<\/p>\n<h1>\u8ffd\u8a18\uff082019\/12\/28\uff09<\/h1>\n<p>GitHub \u306b\u304a\u3044\u3066\u3042\u308b\u30b9\u30bf\u30fc\u30c8\u30a2\u30c3\u30d7\u30eb\u30fc\u30c1\u30f3\u306b\u306f DOS \u306e exit \u30b7\u30b9\u30c6\u30e0\u30b3\u30fc\u30eb\u3092\u547c\u3073\u51fa\u3059\u30b3\u30fc\u30c9\u304c\u542b\u307e\u308c\u3066\u3044\u307e\u3057\u305f\u306e\u3067\u3001\u305d\u308c\u3092\u53d6\u308a\u9664\u304d\u3001\u5358\u7d14\u306b OS \u306b\u30ea\u30bf\u30fc\u30f3\u3059\u308b\u3088\u3046\u306b\u3057\u307e\u3057\u305f\u3002\u307e\u305f\u3001Rust \u306e exit() \u3067\u7d42\u4e86\u30b3\u30fc\u30c9\u3092\u8fd4\u3059\u3088\u3046\u306b\u5909\u66f4\u3057\u3066\u307f\u307e\u3057\u305f\u3002fn exit \u4ee5\u4e0b\u306f\u6b21\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"o\">...<\/span>\r\n\r\n<span class=\"k\">fn<\/span> <span class=\"nf\">exit<\/span><span class=\"p\">(<\/span><span class=\"n\">status<\/span><span class=\"p\">:<\/span> <span class=\"nb\">usize<\/span><span class=\"p\">)<\/span> <span class=\"k\">-&gt;<\/span> <span class=\"o\">!<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">unsafe<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"nd\">rusty_asm!<\/span> <span class=\"p\">{<\/span>\r\n            <span class=\"k\">let<\/span> <span class=\"n\">status<\/span><span class=\"p\">:<\/span> <span class=\"nf\">in<\/span><span class=\"p\">(<\/span><span class=\"s\">\"al\"<\/span><span class=\"p\">)<\/span> <span class=\"o\">=<\/span> <span class=\"n\">status<\/span> <span class=\"k\">as<\/span> <span class=\"nb\">u8<\/span><span class=\"p\">;<\/span>\r\n            <span class=\"nf\">asm<\/span><span class=\"p\">(<\/span><span class=\"s\">\"volatile\"<\/span><span class=\"p\">,<\/span> <span class=\"s\">\"intel\"<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n                <span class=\"s\">\"mov ah, 4ch\r\n                 int 21h\"<\/span>\r\n            <span class=\"p\">}<\/span>\r\n        <span class=\"p\">}<\/span>\r\n    <span class=\"p\">}<\/span>\r\n    <span class=\"k\">loop<\/span> <span class=\"p\">{}<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"nd\">#[no_mangle]<\/span>\r\n<span class=\"k\">pub<\/span> <span class=\"k\">extern<\/span> <span class=\"s\">\"C\"<\/span> <span class=\"k\">fn<\/span> <span class=\"mi\">_<\/span><span class=\"nf\">start<\/span><span class=\"p\">()<\/span> <span class=\"k\">-&gt;<\/span> <span class=\"o\">!<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"n\">msg<\/span> <span class=\"o\">=<\/span> <span class=\"s\">\"Hello, world!<\/span><span class=\"se\">\\r\\n<\/span><span class=\"s\">\"<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"n\">buf<\/span> <span class=\"o\">=<\/span> <span class=\"n\">msg<\/span><span class=\"nf\">.as_ptr<\/span><span class=\"p\">();<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"n\">len<\/span> <span class=\"o\">=<\/span> <span class=\"n\">msg<\/span><span class=\"nf\">.len<\/span><span class=\"p\">();<\/span>\r\n\r\n    <span class=\"nf\">write<\/span><span class=\"p\">(<\/span><span class=\"mi\">1<\/span><span class=\"p\">,<\/span> <span class=\"n\">buf<\/span><span class=\"p\">,<\/span> <span class=\"n\">len<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"nf\">exit<\/span><span class=\"p\">(<\/span><span class=\"mi\">0<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u3061\u306a\u307f\u306b\u3001\u30d0\u30a4\u30ca\u30ea\u30b5\u30a4\u30ba\u306f56\u30d0\u30a4\u30c8\u3068\u306a\u308a\u307e\u3057\u305f\u3002<br \/>\n@fujitanozomu \u3055\u3093\u3001\u3054\u6307\u6458\u3042\u308a\u304c\u3068\u3046\u3054\u3056\u3044\u307e\u3057\u305f\u3002<\/p>\n<h1>\u8ffd\u8a18\uff082020\/5\/4\uff09<\/h1>\n<p>2020\u5e741\u6708\u9803\u3001Homebrew \u306e i386-elf-gcc \u3068 x86_64-elf-gcc \u306e\u74b0\u5883\u304c\u7d71\u5408\u3055\u308c\u3066\u3057\u307e\u3063\u305f\u306e\u3067\u3001\u95a2\u9023\u3059\u308b\u7b87\u6240\u3092\u4fee\u6b63\u3057\u3066\u304a\u304d\u307e\u3057\u305f\u3002<\/p>\n<p>\u307e\u305f\u3001Rust nightly \u3067 asm! \u304c deprecated \u306b\u306a\u3063\u3066\u3044\u307e\u3059\uff08RFC2843: Add llvm_asm! and deprecate asm!\uff09\u306e\u3067\u3001rusty_asm \u306e\u4ee3\u308f\u308a\u306b\u76f4\u63a5 llvm_asm \u3092\u547c\u3076\u3053\u3068\u306b\u3057\u307e\u3057\u305f\u3002\u4fee\u6b63\u7248\u306b\u3064\u3044\u3066\u306f\u3053\u3061\u3089\u3092\u3054\u89a7\u304f\u3060\u3055\u3044\u3002<\/p>\n<div>\n<p>Crate cc \u3092\u4f7f\u3046\u5834\u5408\u306b\u306f\u3053\u3053\u3089\u3078\u3093\u306f\u3088\u304d\u306b\u8a08\u3089\u3063\u3066\u3082\u3089\u3048\u308b\u306e\u3067\u3001\u6c17\u3092\u4f7f\u3046\u5fc5\u8981\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u00a0\u21a9<\/p>\n<p>\u3054\u304f\u7c21\u5358\u306a\u30d7\u30ed\u30b0\u30e9\u30e0\u306f\u52d5\u304f\u306e\u3067\u3059\u304c\u3001\u5c11\u3057\u3067\u3082 Rust \u3089\u3057\u3044\u3053\u3068\u3092\u3084\u308d\u3046\u3068\u601d\u3046\u3068\u3001rustc \u304c\u843d\u3061\u305f\u308a\u3001\u30ea\u30f3\u30af\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u3066\u3057\u307e\u3063\u3066\u3044\u307e\u3059\u3002\u306a\u306e\u3067\u3001\u6b63\u76f4\u306a\u3068\u3053\u308d\u3001\u5b9f\u7528\u7684\u306b\u306f\u3061\u3087\u3063\u3068\u8f9b\u3044\u3068\u601d\u3044\u307e\u3059\u306e\u3067\u3001\u3042\u304f\u307e\u3067\u3082\u5c0f\u30cd\u30bf\u3068\u3044\u3046\u3053\u3068\u3067\u304a\u8a31\u3057\u4e0b\u3055\u3044\u3002\u00a0\u21a9<\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>\u306f\u3058\u3081\u306b \u3053\u306e\u8a18\u4e8b\u306f Rust\u305d\u306e2 Advent Calendar 2019 15\u65e5\u76ee \u306e\u8a18\u4e8b\u3067\u3059\u3002\u5c0f\u30cd\u30bf\u306b [&hellip;]<\/p>\n","protected":false},"author":12,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-45570","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>- Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/zh\/blog\/45570-2\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:description\" content=\"\u306f\u3058\u3081\u306b \u3053\u306e\u8a18\u4e8b\u306f Rust\u305d\u306e2 Advent Calendar 2019 15\u65e5\u76ee 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