{"id":172,"date":"2017-08-11T14:21:54","date_gmt":"2017-08-11T06:21:54","guid":{"rendered":"http:\/\/www.sinkland.cn\/?p=172"},"modified":"2019-08-17T15:05:04","modified_gmt":"2019-08-17T07:05:04","slug":"smlos%e5%85%ab-%e5%86%85%e5%ad%98%e7%ae%a1%e7%90%86%e7%b3%bb%e7%bb%9f%e5%ae%9e%e7%8e%b0","status":"publish","type":"post","link":"http:\/\/www.sinkland.cn\/?p=172","title":{"rendered":"SmlOS\u516b-\u5185\u5b58\u7ba1\u7406\u7cfb\u7edf\u5b9e\u73b0"},"content":{"rendered":"

\u5185\u5b58\u5927\u5c0f\u7684\u68c0\u6d4b<\/h3>\n

\u8fd9\u91cc\u4f7f\u7528\u4e86\u662f\u5f88\u7b28\u7684\u65b9\u6cd5,\u5c31\u662f\u68c0\u6d4b\u6307\u5b9a\u5185\u5b58\u5730\u5740\u662f\u5426\u53ef\u5199\u3002<\/p>\n

\u5199\u6210c\u5927\u81f4\u4f2a\u7801\u5927\u6982\u662f:<\/p>\n

int count_mem_size()\n{\n    int i = 0;\n    for (int i = 4M ; i < 4G; i+= 0x1000)\n    {\n        int *p = i;\n        *p = 0x11223344;\n        if (*p != 0x11223344)\n        {\n            return i;\n        }\n    }\n    return i;\n}\n<\/code><\/pre>\n
\u6709\u4eba\u53ef\u80fd\u5bf9\u8fd9\u6837\u7684\u4ee3\u7801\u5f88\u597d\u5947\uff0c\u8fd9\u6837\u5199\u5185\u5b58\uff0c\u4e0d\u4f1a\u5185\u5b58\u8d8a\u754c\uff0c\u5bfc\u81f4\u5954\u6e83\u5417\uff1f<\/p>\n
\u7b2c\u4e00\u5462\uff0c\u6211\u4eec\u5728gdt\u4e2d\u8bbe\u7f6e\u4e86\u53ef\u4ee5\u8bbf\u95ee4g\u7684\u5185\u5b58\u6bb5\u3002<\/p>\n
\u7b2c\u4e8c\u5462\uff0c\u6211\u4eec\u5e76\u6ca1\u6709\u8bbe\u7f6e\u76f8\u5173\u7684idt\u5f02\u5e38\u5904\u7406\u51fd\u6570\uff0c\u6240\u4ee5\u4e5f\u4e0d\u4f1a\u8fdb\u5165\u76f8\u5173\u7684\u5185\u5b58\u64cd\u4f5c\u5f02\u5e38\u5904\u7406\u51fd\u6570\u3002<\/p>\n
\u4e5f\u5c31\u662f\u8bf4\u5373\u4f7f\u5199\u8d8a\u754c\u4e86\uff0c\u4e5f\u4e0d\u4f1a\u6536\u5230\u5f02\u5e38\u3002<\/p>\n
\u6240\u4ee5\u5bf9\u4e8e\u4e0d\u53ef\u8bbf\u95ee\u7684\u5185\u5b58\uff0c\u6240\u4ee5\u770b\u5230\u7684\u73b0\u8c61\u5c31\u662f\uff0c\u5199\u5165\u5185\u5b58\u4e86\u4e00\u4e2a\u503c\uff0c\u4f46\u662f\u8bfb\u53d6\u51fa\u6765\u5374\u4e0d\u4e00\u81f4\u7684\u60c5\u51b5\u3002<\/p>\n
\u4f46\u662f\u8fd9\u79cd\u83ab\u540d\u5176\u5999\u7684\u64cd\u4f5c\uff0c\u5f88\u6709\u53ef\u80fd\u4f1a\u88abC\u7f16\u8bd1\u5668\u4f18\u5316\u6389\uff0c\u6240\u4ee5\u8fd9\u90e8\u5206\u7531\u6c47\u7f16\u5b9e\u73b0\u3002<\/p>\n
\u6c47\u7f16\u51fd\u6570\u4e2d\u5462\uff0c\u91c7\u7528\u4e86\u5199\u5165\u518d\u53d6\u53cd\u518d\u8bfb\u53d6\u7684\u64cd\u4f5c\uff0c\u4f46\u5927\u81f4\u539f\u7406\u662f\u4e00\u6837\u7684\u3002<\/p>\n
\u5185\u5b58\u68c0\u6d4b\u6c47\u7f16\u5b9e\u73b0:<\/p>\n
; \u5185\u5b58\u68c0\u67e5\u51fd\u6570    \u68c0\u67e5start\u5730\u5740\u5f00\u59cb\u5230end\u5730\u5740\u7684\u8303\u56f4\u5185,\u80fd\u591f\u4f7f\u7528\u7684\u5185\u5b58\u7684\u672b\u5c3e\u5730\u5740,\u5e76\u5c06\u5176\u4f5c\u4e3a\u8fd4\u56de\u503c\u8fd4\u56de\n_memtest_sub: ; unsigned int memtest_sub(unsigned int start, unsigned int end)\n    PUSH   EDI                  ; \u4fdd\u5b58EDI ESI EBX\n    PUSH   ESI\n    PUSH   EBX\n    MOV    ESI,0xaa55aa55           ; pat0 = 0xaa55aa55;\n    MOV    EDI,0x55aa55aa           ; pat1 = 0x55aa55aa;\n    MOV    EAX,[ESP+12+4]           ; i = start;\nmts_loop:\n    MOV    EBX,EAX\n    ADD    EBX,0xffc            ; p = i + 0xffc;\n    MOV    EDX,[EBX]            ; old = *p;\n    MOV    [EBX],ESI            ; *p = pat0;\n    XOR    DWORD [EBX],0xffffffff   ; *p ^= 0xffffffff;\n    CMP    EDI,[EBX]            ; if (*p != pat1) goto fin;\n    JNE    mts_fin\n    XOR    DWORD [EBX],0xffffffff   ; *p ^= 0xffffffff;\n    CMP    ESI,[EBX]            ; if (*p != pat0) goto fin;\n    JNE    mts_fin\n    MOV    [EBX],EDX            ; *p = old;\n    ADD    EAX,0x1000           ; i += 0x1000;\n    CMP    EAX,[ESP+12+8]           ; if (i <= end) goto mts_loop;\n    JBE    mts_loop\n    POP    EBX\n    POP    ESI\n    POP    EDI\n    RET\nmts_fin:\n    MOV    [EBX],EDX            ; *p = old;\n    POP    EBX\n    POP    ESI\n    POP    EDI\n    RET\n<\/code><\/pre>\n
\n
\u5173\u95ed\u9ad8\u901f\u7f13\u5b58<\/h3>\n
\n  \u9ad8\u901f\u7f13\u5b58\u7b80\u4ecb\uff1a<\/p>\n
  \u5927\u81f4\u5c31\u662f\u5c06\u5185\u5b58\u4e2d\u7ecf\u5e38\u8bbf\u95ee\u7684\u5730\u5740\u5185\u5bb9\u5b58\u5728\u9ad8\u901f\u7f13\u5b58\u4e2d\uff0c\u5728\u8ba1\u7b97\u673a\u8bfb\u53d6\u5185\u5b58\u5185\u5bb9\u4e2d\u7684\u65f6\u5019\uff0c\u5148\u4ece\u9ad8\u901f\u7f13\u5b58\u8bfb\u53d6\uff0c\u4ee5\u63d0\u5347\u8bfb\u53d6\u901f\u5ea6\u3002\n<\/p><\/blockquote>\n
\u6211\u4eec\u9700\u8981\u68c0\u6d4b\u4e4b\u524d\u5173\u95ed\u9ad8\u901f\u7f13\u5b58\uff0c\u4ee5\u514d\u68c0\u6d4b\u4e0d\u51c6\u786e\u3002<\/p>\n
\/\/\u7528\u4e8e\u8bbe\u7f6e\u548c\u6e05\u9664CR0\u7684NW\u4e0eCD\u4f4d,\u8bbe\u7f6e\u9ad8\u901f\u7f13\u5b58\u7528 \n#define CR0_CACHE_DISABLE  0x60000000  \n\n    \/\/\u7981\u6b62\u9ad8\u901f\u7f13\u5b58\n    cr0 = load_cr0(); \n    cr0 |= CR0_CACHE_DISABLE;  \n    store_cr0(cr0);           \n<\/code><\/pre>\n
\n
\u5185\u5b58\u5206\u914d\u7ba1\u7406<\/h3>\n
\u6211\u4eec\u9700\u8981\u6784\u9020\u4e00\u4e2a\u6a21\u5757\uff0c\u7edf\u4e00\u5206\u914d\u548c\u7ba1\u7406\u5185\u5b58\u3002<\/p>\n
\u5c31\u662fmalloc\u51fd\u6570\u4e2d\uff0c\u7cfb\u7edf\u5e95\u5c42\u662f\u5982\u4f55\u51b3\u5b9a\u5206\u914d\u54ea\u4e9b\u5185\u5b58\u7ed9\u4f60\u5462\u3002<\/p>\n
\u7cfb\u7edf\u9700\u8981\u505a\u7684\u662f\uff1a<\/p>\n
    \n
  • 1.\u786e\u4fdd\u5206\u914d\u7ed9\u4f60\u7684\u5185\u5b58\u662f\u6ca1\u6709\u5360\u7528\u7684<\/li>\n
  • 2.\u6709\u8db3\u591f\u9ad8\u7684\u6548\u7387\u548c\u5185\u5b58\u8bb0\u5f55\u7ed3\u6784\u4f53\u7684\u5360\u7528<\/li>\n<\/ul>\n
    \u6211\u4eec\u4f7f\u7528\u7684\u65b9\u5f0f\u662f\uff1a\u53ea\u8bb0\u5f55\u672a\u4f7f\u7528\u5185\u5b58\u3002<\/p>\n
    \u6bd4\u5982\u8bf4\u7cfb\u7edf\u6709100M\u5185\u5b58\uff0c\u521a\u5f00\u59cb\u53ea\u662f\u5185\u6838\u76f8\u5173\u5360\u636e\u4e861M:<\/p>\n
    \u90a3\u4e48\u5185\u5b58\u7ba1\u7406\u8868\u8bb0\u5f55\u5c31\u662f:<\/p>\n\n\n\n\n\n
    \u7a7a\u95f2\u5730\u5740<\/th>\n\u5927\u5c0f<\/th>\n<\/tr>\n<\/thead>\n
    1M\u5f00\u59cb<\/td>\n99M<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
    \u7136\u540e\u6211\u5206\u914d\u4e8610M\u5185\u5b58:(\u5206\u914d\u7a7a\u95f4 1M-11M)<\/p>\n\n\n\n\n\n
    \u7a7a\u95f2\u5730\u5740<\/th>\n\u5927\u5c0f<\/th>\n<\/tr>\n<\/thead>\n
    11M\u5f00\u59cb<\/td>\n89M<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
    \u7136\u540e\u7531\u5206\u914d\u4e865M:(\u5206\u914d\u7a7a\u95f4 11M-16M)<\/p>\n\n\n\n\n\n
    \u7a7a\u95f2\u5730\u5740<\/th>\n\u5927\u5c0f<\/th>\n<\/tr>\n<\/thead>\n
    16M\u5f00\u59cb<\/td>\n84M<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
    \u7136\u540e\u91ca\u653e\u4e86\u4e0a\u9762\u7533\u8bf7\u768410M:<\/p>\n\n\n\n\n\n\n
    \u7a7a\u95f2\u5730\u5740<\/th>\n\u5927\u5c0f<\/th>\n<\/tr>\n<\/thead>\n
    1M\u5f00\u59cb<\/td>\n10M<\/td>\n<\/tr>\n
    16M\u5f00\u59cb<\/td>\n84M<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
    \u8fd9\u91cc\u7684\u7a7a\u95f2\u5185\u5b58\u6761\u76ee\u53d8\u6210\u4e86\u4e24\u6761\u3002<\/p>\n
    \u4e0b\u6b21\u5206\u914d\u4f1a\u627e\u7b2c\u4e00\u4e2a\u6ee1\u8db3\u6761\u4ef6\u7684\u5185\u5b58\u5757\u3002<\/p>\n
    \u8fd9\u6837\u7684\u597d\u5904\u662f\uff0c\u53ef\u4ee5\u7528\u5f88\u5c11\u7684\u5185\u5b58\u7ba1\u7406\u76f8\u5173\u5185\u5b58\uff0c\u8bb0\u5f55\u6211\u4eec\u9700\u8981\u7684\u4fe1\u606f\u3002<\/p>\n
    \u7136\u540e\u6211\u4eec\u9700\u8981\u7ef4\u62a4\u4e00\u4e2a\u5185\u5b58\u7ba1\u7406\u8868\u3002
    \n\u5185\u5b58\u7ba1\u7406\u8868\u7684\u7ed3\u6784\u5982\u4e0b\uff1a<\/p>\n
    struct MEMMAN\n{\n   int frees, maxfrees, lostsize, losts;\n   struct FREEINFO free[MEMMAN_FREES];\n};\n<\/code><\/pre>\n
    \u5185\u5b58\u7ba1\u7406\u7ed3\u6784<\/p>\n
      \n
    • frees\uff1a\u5185\u5b58\u53ef\u7528\u4fe1\u606f\u6761\u76ee\u7684\u6570\u76ee<\/li>\n
    • maxfrees: frees\u7684\u6700\u5927\u503c<\/li>\n
    • lostsize: \u91ca\u653e\u5931\u8d25\u7684\u5185\u5b58\u5927\u5c0f\u7684\u603b\u548c<\/li>\n
    • losts: \u91ca\u653e\u5931\u8d25\u7684\u6b21\u6570<\/li>\n
    • struct FREEINFO free[MEMMAN_FREES];<\/li>\n<\/ul>\n
      \n  \u5185\u5b58\u53ef\u7528\u4fe1\u606f\u6761\u76ee\u6570\u7ec4\n<\/p><\/blockquote>\n
      \u5355\u5757\u5185\u5b58\u4fe1\u606f\u7ed3\u6784\u4f53\uff1a<\/p>\n
      \u5185\u5b58\u53ef\u7528\u4fe1\u606f\u6761\u76ee<\/p>\n
      struct FREEINFO\n{\n   unsigned int addr, size;\n};\n<\/code><\/pre>\n
        \n
      • addr: \u53ef\u7528\u5185\u5b58\u5757\u9996\u5730\u5740<\/li>\n
      • size: \u53ef\u7528\u5185\u5b58\u5757\u5927\u5c0f<\/li>\n<\/ul>\n
        \n
        \u5185\u5b58\u5206\u914d<\/h3>\n
        \u53c2\u8003\u4e0a\u9762\u7684\u4f8b\u5b50\u8bf4\u660e\u3002<\/p>\n
        \u5185\u5b58\u5206\u914d\u7b97\u6cd5\u7b80\u8981\u6765\u8bf4\u5c31\u662f,\u5728\u5185\u5b58\u5206\u914d\u51fd\u6570\u4e2d\uff0c\u9996\u5148\u9700\u8981\u5728\u7ba1\u7406\u8868\u4e2d\u904d\u5386\uff0c\u627e\u5230\u7b2c\u4e00\u4e2a\u53ef\u7528\u5185\u5b58\uff0c\u7136\u540e\u518d \u5185\u5b58\u4e2d\u5272\u9664\u8fd9\u4e00\u90e8\u5206\u3002<\/p>\n
        \u5411\u4e0a\u53d6\u6574<\/h3>\n
        \u4e3b\u8981\u76ee\u7684\u662f\u4e3a\u4e86\u51cf\u5c11\u5185\u5b58\u7a7a\u6d1e\u7684\u53ef\u80fd\u6027\u3002<\/p>\n
        \u5f53\u7136\u5982\u679c\u7533\u8bf7\u7684\u5185\u5b58\u8fc7\u4e8e\u96f6\u788e\uff0c\u91cd\u590d\u7684\u91ca\u653e\u548c\u7533\u8bf7\uff0c\u53ef\u80fd\u4f1a\u8d85\u8fc7\u5185\u5b58\u7ba1\u7406\u8868\u7a7a\u95f2\u5757\u6700\u5927\u8bb0\u5f55\u6570\uff0c\u6240\u4ee5\u5206\u914d\u7684\u65f6\u5019\u4e00\u822c\u4f1a\u4ee54K\u5411\u4e0a\u53d6\u6574\u3002<\/p>\n
        4K\u5411\u4e0a\u53d6\u6574\u7684\u610f\u601d\u5c31\u662f\uff0c\u65e0\u8bba\u9700\u8981\u5206\u914d\u5185\u5b58\u7684\u957f\u5ea6\uff0c\u6700\u4f4e\u90fd\u4f1a\u5206\u914d4K\uff0c\u5982\u679c\u8d85\u8fc74k\uff0c\u4e5f\u4f1a\u5206\u914d4K\u7684\u500d\u6570\u3002<\/p>\n
        \u6bd4\u5982\u4f60\u7533\u8bf71byte\uff0c\u4f1a\u5206\u914d\u7ed9\u4f604k\u5927\u5c0f\u3002
        \n\u4f60\u7533\u8bf74k + 1byte\uff0c\u4f1a\u5206\u914d\u7ed9\u4f608k\u5927\u5c0f\u3002<\/p>\n
        \u6838\u5fc3\u8ba1\u7b97\u8bed\u53e5:<\/p>\n
        \/\/\u5411\u4e0a\u4ee54K\u53d6\u6574\nsize = (size + 0xfff) & 0xfffff000; \n<\/code><\/pre>\n
        \n
        \u5185\u5b58\u91ca\u653e<\/h3>\n
        \u5185\u5b58\u7684\u91ca\u653e\u4e3b\u8981\u5bf9\u5185\u5b58\u7ba1\u7406\u8868\u8fdb\u884c\u64cd\u4f5c\uff0c\u5176\u4e2d\u9700\u8981\u6ce8\u610f\u662f\uff0c<\/p>\n
        \u91ca\u653e\u7684\u5185\u5b58\u662f\u5426\u53ef\u4ee5\u548c\u8868\u4e2d\u7a7a\u95f2\u6bb5\u6bb5\u5408\u5e76\u6210\u4e00\u6bb5:<\/p>\n
          \n
        • \n
          1.\u53ef\u4ee5\u5408\u5e76\u7684\u8bdd\uff0c\u5c3d\u91cf\u5408\u5e76<\/p>\n<\/li>\n
        • \n
          2.\u4e0d\u80fd\u5408\u5e76\uff0c\u5206\u62c6\u51fa\u4e00\u4e2a\u7a7a\u95f2\u8bb0\u5f55\u6761\u76ee\uff0c\u52a0\u5165\u5185\u5b58\u7ba1\u7406\u8868<\/p>\n<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"
          \u5185\u5b58\u5927\u5c0f\u7684\u68c0\u6d4b \u8fd9\u91cc\u4f7f\u7528\u4e86\u662f\u5f88\u7b28\u7684\u65b9\u6cd5,\u5c31\u662f\u68c0\u6d4b\u6307\u5b9a\u5185\u5b58\u5730\u5740\u662f\u5426\u53ef\u5199\u3002 \u5199\u6210c\u5927\u81f4\u4f2a\u7801\u5927\u6982\u662f: int cou […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[],"_links":{"self":[{"href":"http:\/\/www.sinkland.cn\/index.php?rest_route=\/wp\/v2\/posts\/172"}],"collection":[{"href":"http:\/\/www.sinkland.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.sinkland.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.sinkland.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.sinkland.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=172"}],"version-history":[{"count":6,"href":"http:\/\/www.sinkland.cn\/index.php?rest_route=\/wp\/v2\/posts\/172\/revisions"}],"predecessor-version":[{"id":187,"href":"http:\/\/www.sinkland.cn\/index.php?rest_route=\/wp\/v2\/posts\/172\/revisions\/187"}],"wp:attachment":[{"href":"http:\/\/www.sinkland.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=172"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.sinkland.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=172"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.sinkland.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=172"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}