{"id":426566,"date":"2021-04-07T23:00:16","date_gmt":"2021-04-07T15:00:16","guid":{"rendered":"http:\/\/4563.org\/?p=426566"},"modified":"2021-04-07T23:00:16","modified_gmt":"2021-04-07T15:00:16","slug":"%e4%b8%ba%e4%bb%80%e4%b9%88-binder-%e9%a9%b1%e5%8a%a8%e9%9c%80%e8%a6%81%e5%9c%a8%e5%86%85%e6%a0%b8%e7%a9%ba%e9%97%b4%e5%bc%80%e8%be%9f%e4%b8%a4%e4%b8%aa%e7%bc%93%e5%ad%98%e5%8c%ba%ef%bc%9f","status":"publish","type":"post","link":"http:\/\/4563.org\/?p=426566","title":{"rendered":"\u4e3a\u4ec0\u4e48 Binder \u9a71\u52a8\u9700\u8981\u5728\u5185\u6838\u7a7a\u95f4\u5f00\u8f9f\u4e24\u4e2a\u7f13\u5b58\u533a\uff1f"},"content":{"rendered":"
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\u4e3a\u4ec0\u4e48 Binder \u9a71\u52a8\u9700\u8981\u5728\u5185\u6838\u7a7a\u95f4\u5f00\u8f9f\u4e24\u4e2a\u7f13\u5b58\u533a\uff1f <\/h1>\n

<\/p>\n

\n
\u8cc7\u6df1\u5927\u4f6c : kerb15 <\/span> <\/i> 3<\/span> <\/div>\n
<\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n
<\/p>\n

\u5b66\u4e60 Binder \u901a\u4fe1\u539f\u7406\u7684\u65f6\u5019\uff0c\u770b\u5230\u4e0b\u9762\u8fd9\u6bb5\u8bdd<\/p>\n

Binder \u901a\u4fe1\u7684\u6b65\u9aa4\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n

1.Binder \u9a71\u52a8\u5728\u5185\u6838\u7a7a\u95f4\u521b\u5efa\u4e00\u4e2a [\u6570\u636e\u63a5\u6536\u7f13\u5b58\u533a] \u3002 2.\u5728\u5185\u6838\u7a7a\u95f4\u5f00\u8f9f\u4e00\u5757 [\u5185\u6838\u7f13\u5b58\u533a] \uff0c\u5efa\u7acb\u5185\u6838\u7f13\u5b58\u533a\u548c\u6570\u636e\u63a5\u6536\u7f13\u5b58\u533a\u4e4b\u95f4\u7684\u6620\u5c04\u5173\u7cfb\uff0c\u4ee5\u53ca\u6570\u636e\u63a5\u6536\u7f13\u5b58\u533a\u548c\u63a5\u6536\u8fdb\u7a0b\u7528\u6237\u7a7a\u95f4\u5730\u5740\u7684\u6620\u5c04\u5173\u7cfb\u3002 3.\u53d1\u9001\u65b9\u8fdb\u7a0b\u901a\u8fc7 copy_from_user()\u51fd\u6570\u5c06\u6570\u636e\u62f7\u8d1d \u5230\u5185\u6838\u4e2d\u7684\u5185\u6838\u7f13\u5b58\u533a\uff0c\u7531\u4e8e\u5185\u6838\u7f13\u5b58\u533a\u548c\u63a5\u6536\u8fdb\u7a0b\u7684\u7528\u6237\u7a7a\u95f4\u5b58\u5728\u5185\u5b58\u6620\u5c04\uff0c\u56e0\u6b64\u4e5f\u5c31\u76f8\u5f53\u4e8e\u628a\u6570\u636e\u53d1\u9001\u5230\u4e86\u63a5\u6536\u8fdb\u7a0b\u7684\u7528\u6237\u7a7a\u95f4\uff0c\u8fd9\u6837\u4fbf\u5b8c\u6210\u4e86\u4e00\u6b21\u8fdb\u7a0b\u95f4\u7684\u901a\u4fe1\u3002<\/p>\n

\u6574\u4e2a\u8fc7\u7a0b\u53ea\u4f7f\u7528\u4e86 1 \u6b21\u62f7\u8d1d\uff0c\u4e0d\u4f1a\u56e0\u4e3a\u4e0d\u77e5\u9053\u6570\u636e\u7684\u5927\u5c0f\u800c\u6d6a\u8d39\u7a7a\u95f4\u6216\u8005\u65f6\u95f4\uff0c\u6548\u7387\u66f4\u9ad8\u3002<\/p>\n

\u6458\u81ea\u5218\u671b\u8212\u7684\u300a Android \u8fdb\u9636\u6307\u5317\u300b<\/p>\n

\u60f3\u95ee\u4e0b\u4e3a\u4ec0\u4e48\u9700\u8981\u5f00\u8f9f\u4e24\u4e2a\u7f13\u5b58\u533a\uff0c\u8fd9\u4e24\u4e2a\u7f13\u5b58\u533a\u4e92\u76f8\u6620\u5c04\u7684\u76ee\u7684\u662f\u4ec0\u4e48\uff0c\u76f4\u63a5\u4f7f\u7528\u4e00\u4e2a\u7f13\u5b58\u533a\u4e0d\u884c\u5417\uff1f<\/p>\n

\u6709\u6ca1\u6709\u7814\u7a76\u8fc7\u7684\u5927\u4f6c\u89e3\u7b54\u4e00\u4e8c\uff0c\u8c22\u8c22~<\/p>\n<\/p><\/div>\n

\u5927\u4f6c\u6709\u8a71\u8aaa<\/b> (4<\/span>) <\/div>\n
<\/div>\n<\/p><\/div>\n<\/p><\/div>\n
    \n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : rochek <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u65e2\u7136\u5b66\u4e60\uff0c\u5efa\u8bae\u770b\u4ee3\u7801 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : tylinux <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u4f20\u7edf IPC \u5c31\u662f\u4e00\u4e2a\u5185\u6838\u7f13\u51b2\u533a\uff0c\u4f46\u662f\u8fd9\u6837\u4f1a\u6709\u4e24\u6b21\u5185\u5b58\u62f7\u8d1d\uff0c\u53d1\u9001 -> \u5185\u6838 -> \u63a5\u6536\u3002Binder \u91cc\u7684\u300e\u6570\u636e\u63a5\u6536\u7f13\u5b58\u533a\u300f\u5176\u5b9e\u662f mmap \u5230 \u300e\u5185\u6838\u7f13\u5b58\u533a\u300f\u7684\uff0c\u540c\u65f6\uff0c\u4e5f\u4f1a mmap \u5230\u63a5\u6536\u8fdb\u7a0b\u7684\u7528\u6237\u7a7a\u95f4\u4e0b\uff0c\u6240\u4ee5\u4e00\u6b21 copy \u5c31\u53ef\u4ee5\u628a\u6570\u636e\u540c\u6b65\u5230\u63a5\u6536\u8fdb\u7a0b\u4e86\u3002\uff08\u975e\u4e13\u4e1a Android \u5f00\u53d1\uff0c\u53ef\u80fd\u6709\u8bef\uff09 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : kerb15 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @tylinux \u4f60\u7684\u610f\u601d\u662f\u4e0d\u662f\u8bf4\u300e\u5185\u6838\u7f13\u5b58\u533a\u300f\u662f\u5c5e\u4e8e\u5185\u6838\u7a7a\u95f4\u7684\uff0c\u800c\u300e\u6570\u636e\u7f13\u5b58\u533a\u300f\u662f binder \u9a71\u52a8\u7684\uff0cbinder \u9a71\u52a8\u6ca1\u529e\u6cd5\u8ba9\u300e\u5185\u6838\u7f13\u5b58\u533a\u300f\u8ddf\u63a5\u53d7\u8fdb\u7a0b\u7684\u7528\u6237\u7a7a\u95f4\u76f4\u63a5\u505a\u6620\u5c04\uff0c\u6240\u4ee5\u5fc5\u987b\u5728\u81ea\u5df1\u5185\u90e8\u52a0\u591a\u4e00\u5757\u300e\u63a5\u6536\u6570\u636e\u7f13\u5b58\u533a\u300f\uff0c\u505a\u6620\u5c04\u7684\u4e2d\u8f6c <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : erwa <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u8bf4\u4e0b\u6211\u7684\u7406\u89e3\u63d0\u4f9b\u53c2\u8003\uff1a<\/p>\n

    1. Binder \u901a\u4fe1\u8fc7\u7a0b\u7684\u6570\u636e\u7531\u300e\u534f\u8bae\u6570\u636e\u300f+\u300e RPC Data \uff08\u7528\u6237\u7684\u6570\u636e\uff09\u300f\u7ec4\u6210\uff0c\u4f46\u5176\u4e2d\u300e\u534f\u8bae\u6570\u636e\u300f\u5305\u542b\u7740\u300e RPC Data \u300f\u7684\u6570\u636e\u5927\u5c0f\u3001\u9996\u5730\u5740\u7b49\u5176\u5b83\u7528\u4e8e\u901a\u4fe1\u903b\u8f91\u7684\u4fe1\u606f
    2. \u9a71\u52a8\u7a0b\u5e8f\u901a\u8fc7 copy_from_user() \u5c06\u300e\u534f\u8bae\u6570\u636e\u300f\u62f7\u8d1d\u5230\u5185\u6838\uff0c\u4e00\u901a\u903b\u8f91\u540e\uff0c\u5728\u300e\u76ee\u6807\u8fdb\u7a0b\u300f\u6620\u5c04\u7684\u865a\u62df\u5730\u5740\u7a7a\u95f4\u4e2d\u5206\u914d\u300e RPC Data \u300f\u5927\u5c0f\u7684\u5185\u5b58
    3. \u518d\u901a\u8fc7 copy_from_user() \u5c06\u300e RPC Data \u300f\u76f4\u63a5\u62f7\u8d1d\u5230\u8fd9\u5757\u5185\u5b58\uff0c\u4e5f\u5c31\u662f\u4e00\u6b21\u62f7\u8d1d\u7684\u6765\u6e90
    4. \u901a\u77e5\u76ee\u6807\u8fdb\u7a0b\u7684 Binder \u7ebf\u7a0b\u5904\u7406\u4efb\u52a1\uff0c\u5b83\u4f1a\u901a\u8fc7 copy_to_user() \u5c06\u300e\u534f\u8bae\u6570\u636e\u300f\u62f7\u8d1d\u5230\u5b83\u7684\u7528\u6237\u7a7a\u95f4<\/p>\n

    \u4e5f\u5c31\u662f\uff1a\u7528\u6237\u6570\u636e\u62f7\u8d1d\u4e00\u6b21\uff0c\u534f\u8bae\u6570\u636e\u8981\u62f7\u8d1d\u4e24\u6b21<\/p>\n

    \u6240\u4ee5\u5bf9\u4e8e\u4e66\u4e2d\u300e\u5f00\u8f9f\u7684\u4e24\u4e2a\u7f13\u5b58\u533a\u300f\u6211\u4e5f\u6301\u6709\u7591\u95ee\u3002 <\/p><\/div>\n<\/p><\/div>\n<\/li>\n

  • \n","protected":false},"excerpt":{"rendered":"

    \u4e3a\u4ec0\u4e48 Binder \u9a71\u52a8\u9700\u8981\u5728\u5185…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[],"tags":[],"_links":{"self":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/426566"}],"collection":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=426566"}],"version-history":[{"count":0,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/426566\/revisions"}],"wp:attachment":[{"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=426566"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=426566"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=426566"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}