{"id":151,"date":"2018-01-08T13:30:20","date_gmt":"2018-01-08T13:30:20","guid":{"rendered":"https:\/\/oimi.me\/?p=151"},"modified":"2018-01-08T13:30:20","modified_gmt":"2018-01-08T13:30:20","slug":"%e8%b0%b7%e6%ad%8c%e7%9a%84spectre%e6%94%bb%e5%87%bb%e4%bf%ae%e8%a1%a5%e6%96%b9%e6%a1%88retpoline%ef%bc%8c%e5%8f%af%e9%81%bf%e5%85%8d%e6%80%a7%e8%83%bd%e5%bd%b1%e5%93%8d","status":"publish","type":"post","link":"https:\/\/myya.net\/index.php\/2018\/01\/08\/%e8%b0%b7%e6%ad%8c%e7%9a%84spectre%e6%94%bb%e5%87%bb%e4%bf%ae%e8%a1%a5%e6%96%b9%e6%a1%88retpoline%ef%bc%8c%e5%8f%af%e9%81%bf%e5%85%8d%e6%80%a7%e8%83%bd%e5%bd%b1%e5%93%8d\/","title":{"rendered":"\u8c37\u6b4c\u7684\u201cSpectre\u653b\u51fb\u201d\u4fee\u8865\u65b9\u6848Retpoline\uff0c\u53ef\u907f\u514d\u6027\u80fd\u5f71\u54cd"},"content":{"rendered":"

1 \u6708 5 \u65e5\uff0c\u8c37\u6b4c\u56e2\u961f\u516c\u5f00\u4e00\u79cd\u907f\u514d Spectre \u653b\u51fb\u7684\u6280\u5de7\u201cRetpoline\u201d\uff0c\u4e14\u5bf9\u6027\u80fd\u7684\u5f71\u54cd\u53ef\u4ee5\u5ffd\u7565\u4e0d\u8ba1\u3002\u636e\u8c37\u6b4c\u56e2\u961f\u8868\u793a\uff0c\u8fd9\u662f\u4e00\u79cd\u907f\u514d\u5206\u652f\u76ee\u6807\u6ce8\u5165\u7684\u4e8c\u8fdb\u5236\u4fee\u6539\u6280\u5de7\u3002\u5229\u7528\u8fd9\u79cd\u65b9\u6cd5\u4efb\u4f55\u5f00\u53d1\u8005\u90fd\u53ef\u4ee5\u5e94\u7528\u5e76\u90e8\u7f72\u5728\u8ba1\u7b97\u673a\u4e2d\uff0c\u7528\u4ee5\u9632\u8303 Spectre \u653b\u51fb\u3002<\/p>\n

\"\"
\n\u8c37\u6b4c\u8868\u793a\uff0c\u4ed6\u4eec\u7ed9\u8fd9\u4e2a\u7f16\u7a0b\u6280\u5de7\uff0c\u53d6\u540d\u4e3aRetpoline\uff0c\u800c\u8fd9\u79cd\u65b9\u6cd5\u5bf9\u8ba1\u7b97\u673a\u6027\u80fd\u7684\u5f71\u54cd\u201c\u5fae\u4e4e\u5176\u5fae\u201d\uff08\u5982\u679c\u4e0e\u5728\u8fc7\u53bb\u7684\u51e0\u5929\u4e2d\u53d1\u5e03\u7684\u5176\u4ed6\u8865\u4e01\u5bf9CPU\u6027\u80fd\u5f71\u54cd\u7a0b\u5ea6\u8fdb\u884c\u5bf9\u6bd4\u7684\u8bdd\uff09\u3002<\/p>\n

\u4fee\u8865\u65b9\u6848\u7684\u4f5c\u8005\u662f Paul Turner\uff0c\u4ed6\u662f\u8c37\u6b4c\u57fa\u7840\u8bbe\u65bd\u6280\u672f\u90e8\u95e8\u7684\u9ad8\u7ea7\u5de5\u7a0b\u5e08\u3002\u800c\u5728\u8c37\u6b4c\u516c\u53f8\u5185\u90e8\uff0c\u4ed6\u4eec\u5df2\u7ecf\u5e94\u7528\u8fd9\u79cd\u6280\u5de7\u5bf9\u79c1\u6709\u6570\u636e\u4e2d\u5fc3\u7684 Linux \u670d\u52a1\u5668\u8fdb\u884c\u4e86\u5b89\u5168\u66f4\u65b0\uff0c\u53ea\u9020\u6210\u5fae\u5c0f\u7684\u6027\u80fd\u635f\u8017<\/p>\n

\u5728 Linux \u4e2d\u5e94\u7528 Retpoline <\/p>\n

\u4f5c\u8005 Turner \u540c\u65f6\u4e5f\u5411 Linux Kernel \u9879\u76ee\u63d0\u51fa\u4e86\u5b8c\u5584\u5efa\u8bae\uff0c\u4ed6\u5efa\u8bae\u5728 Linux \u4e2d\u52a0\u5165 Retpoline \u6280\u5de7\u3002\u5728\u5411\u5176\u4ed6Linux \u5f00\u53d1\u8005\u89e3\u91ca\u4ed6\u7684\u65b9\u6848\u65f6\uff0c\u4ed6\u8be6\u7ec6\u63cf\u7ed8\u4e86\u8fd9\u79cd\u65b9\u6848\u7684\u6027\u80fd\u6d88\u8017\u3002<\/p>\n

Retpoline\u5e73\u5747\u4f1a\u5728\u5185\u90e8\u5de5\u4f5c\u91cf\u4e2d\u589e\u52a0\u4e860-1.5\uff05\u8303\u56f4\u5185\u7684\u603b\u4f53\u5f00\u9500\uff0c\u8fd9\u5176\u4e2d\u4e5f\u5305\u62ec\u4e86\u4e00\u4e9b\u7279\u522b\u9ad8\u7684\u6570\u636e\u5305\u5904\u7406\u5185\u5bb9\u3002
\nRetpoline \u6280\u5de7\u4e5f\u5bf9 Intel \u5f00\u53d1\u8005\u6709\u5e2e\u52a9\uff0cAndi Kleen \u8868\u793a\uff0c<\/p>\n

\u5982\u679c\u6211\u4eec\u60f3\u5728\u5185\u6838\u4e2d\u907f\u514d\u975e\u76f4\u63a5\u8c03\u7528\uff0cRetpoline \u65b9\u6cd5\u5c31\u53ef\u4ee5\u505a\u5230\u4e0d\u8fd0\u7528\u63a8\u6d4b\uff08speculation\uff09\u4e14\u95f4\u63a5\u8c03\u7528\u3002<\/p>\n

\u5982\u4f55\u907f\u514d\u63a8\u6d4b\u6267\u884c<\/p>\n

Kleen \u6240\u8bf4\u7684\u201c\u63a8\u6d4b\u6267\u884c\u201d\uff0c\u6211\u4eec\u5728\u524d\u51e0\u5929\u7684\u62a5\u9053\uff081\uff0c2\uff0c3\uff09\u4e2d\u5df2\u7ecf\u63d0\u8fc7\uff0c\u8fd9\u662f\u4e00\u79cd\u6240\u6709\u73b0\u4ee3CPU\u90fd\u4f1a\u5e94\u7528\u7684\u4ee3\u7801\u4f18\u5316\u6280\u5de7\uff0c\u4e5f\u662f Meltdown \u548c Spectre \u6f0f\u6d1e\u51fa\u73b0\u7684\u4e3b\u8981\u6839\u6e90\u3002<\/p>\n

Retpoline \u662f\u4e00\u4e2a\u8f6f\u4ef6\u7ed3\u6784\uff0c\u53ef\u4ee5\u8ba9\u95f4\u63a5\u5206\u652f\u4ece\u63a8\u6d4b\u6267\u884c\u4e2d\u5206\u79bb\u51fa\u6765\uff0c\u53ef\u4ee5\u5e94\u7528\u5728\u4fdd\u62a4\u654f\u611f\u4e8c\u8fdb\u5236\u6587\u4ef6\uff08\u64cd\u4f5c\u7cfb\u7edf\u548c\u7ba1\u7406\u7a0b\u5e8f\uff09\uff0c\u907f\u514d\u5206\u652f\u76ee\u6807\u6ce8\u5165\u5bf9\u95f4\u63a5\u5206\u652f\u9020\u6210\u7684\u5f71\u54cd\u3002<\/p>\n

\u800c Retpoline \u7684\u540d\u5b57\u5219\u662f\u6e90\u81ea\u4e8e\u201c\u56de\u5f52\u201d\uff08return\uff09\u548c\u201ctrampoline\u201d\uff08\u8e66\u5e8a\uff09\uff0c\u8fd9\u610f\u5473\u7740\u8fd9\u662f\u4e00\u4e2a\u4f7f\u7528\u8fd4\u56de\u64cd\u4f5c\u8fdb\u884c\u6765\u56de\u53cd\u5f39\u7684\u7ed3\u6784\uff0c\u5f62\u8c61\u5730\u8868\u73b0\u51fa\u5728\u9700\u8981\u4fdd\u62a4\u7684\u5185\u5bb9\u4e2d\uff0c\u76f8\u5173\u7684\u63a8\u6d4b\u6267\u884c\u662f\u901a\u8fc7\u201c\u65e0\u4f11\u6b62\u5730\u201d\u53cd\u5f39\u800c\u907f\u514d\u88ab\u7aa5\u63a2\u5230\u3002<\/p>\n

\u6309\u7167\u5176\u4ed6\u5f00\u53d1\u8005\u5bf9\u8fd9\u4e2a\u4fee\u590d\u6280\u5de7\u7684\u8bc4\u4ef7\u6765\u770b\uff0cRetpoline\u521b\u5efa\u4e86\u7c7b\u4f3c\u4e8e\u5b9e\u9645\u4ee3\u7801\u4e2d\u6c38\u8fdc\u4e0d\u4f1a\u8c03\u7528\u7684\u65e0\u9650\u5faa\u73af\u4e4b\u7c7b\u7684\u4e1c\u897f\uff0c\u8fd9\u53ef\u4ee5\u963b\u6b62 CPU \u8fdb\u5165\u63a8\u6d4b\u6267\u884c\u73af\u8282\u3002<\/p>\n

\u5f00\u53d1\u4eba\u5458\u53ef\u4ee5\u5728\u4ed6\u4eec\u7684\u5e94\u7528\u7a0b\u5e8f\u4e8c\u8fdb\u5236\u4ee3\u7801\u4e2d\u5e94\u7528 Retpoline \u6280\u5de7\uff0c\u9632\u6b62\u4ed6\u4eec\u7684\u5e94\u7528\u7a0b\u5e8f\u8bb2\u5185\u5b58\u4fe1\u606f\u66b4\u9732\u7ed9 Spectre \u653b\u51fb\u3002<\/p>\n

\u8fd9\u4e5f\u53ef\u4ee5\u5e94\u7528\u5728\u64cd\u4f5c\u7cfb\u7edf\u5185\u6838\u4e2d\uff0c\u7cfb\u7edf\u7a0b\u5e8f\u3001\u5e93\u548c\u5176\u4ed6\u8f6f\u4ef6\u5982\u6709\u9700\u8981\uff0c\u4e5f\u53ef\u4ee5\u6dfb\u52a0\u3002<\/p>\n

\u76ee\u524d\u9664\u4e86 Linux Kernel \u9879\u76ee\uff0cGCC<\/a> \u548c LLVM<\/a> \u9879\u76ee\u4e5f\u6b63\u5728\u6dfb\u52a0\u5bf9\u8be5\u65b9\u6848\u7684\u652f\u6301\u3002<\/p>\n

\u66f4\u8be6\u7ec6\u7684\u5185\u5bb9\u53ef\u4ee5\u67e5\u770b\u3010\u8c37\u6b4c\u516c\u544a<\/a>\u3011<\/p>\n","protected":false},"excerpt":{"rendered":"

1 \u6708 5 \u65e5\uff0c\u8c37\u6b4c\u56e2\u961f\u516c\u5f00\u4e00\u79cd\u907f\u514d Spectre \u653b\u51fb\u7684\u6280\u5de7\u201cRetpoline\u201d\uff0c\u4e14\u5bf9\u6027\u80fd\u7684\u5f71\u54cd\u53ef\u4ee5\u5ffd\u7565 […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[281,282],"class_list":["post-151","post","type-post","status-publish","format-standard","hentry","category-lab","tag-spectre","tag-speculation"],"_links":{"self":[{"href":"https:\/\/myya.net\/index.php\/wp-json\/wp\/v2\/posts\/151","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/myya.net\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/myya.net\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/myya.net\/index.php\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/myya.net\/index.php\/wp-json\/wp\/v2\/comments?post=151"}],"version-history":[{"count":0,"href":"https:\/\/myya.net\/index.php\/wp-json\/wp\/v2\/posts\/151\/revisions"}],"wp:attachment":[{"href":"https:\/\/myya.net\/index.php\/wp-json\/wp\/v2\/media?parent=151"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/myya.net\/index.php\/wp-json\/wp\/v2\/categories?post=151"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/myya.net\/index.php\/wp-json\/wp\/v2\/tags?post=151"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}