{"id":70791,"date":"2026-02-02T12:33:15","date_gmt":"2026-02-02T04:33:15","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/70791.html"},"modified":"2026-02-02T12:33:15","modified_gmt":"2026-02-02T04:33:15","slug":"%e8%af%a6%e8%a7%a3elf%e6%96%87%e4%bb%b6%e4%ba%94%e5%8d%81%e4%b8%80-data-rel-ro%e8%8a%82","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/70791.html","title":{"rendered":"\u8be6\u89e3ELF\u6587\u4ef6(\u4e94\u5341\u4e00).data.rel.ro\u8282"},"content":{"rendered":"<h3>.data.rel.ro \u8282\u8be6\u89e3<\/h3>\n<p>.data.rel.ro \u8282&#xff08;Read-Only Data After Relocation&#xff09;\u662f ELF \u6587\u4ef6\u4e2d\u7684\u4e00\u4e2a\u7279\u6b8a\u8282\u533a&#xff0c;\u7528\u4e8e\u5b58\u50a8\u5728\u91cd\u5b9a\u4f4d\u5b8c\u6210\u540e\u5e94\u8bbe\u4e3a\u53ea\u8bfb\u7684\u6570\u636e\u3002<\/p>\n<h4>1. \u57fa\u672c\u6982\u5ff5<\/h4>\n<p>.data.rel.ro \u8282\u5168\u79f0\u662f \u201cRead-Only Data After Relocation\u201d&#xff0c;\u5b83\u662f\u4e00\u4e2a\u7279\u6b8a\u7684\u6570\u636e\u8282&#xff0c;\u5305\u542b\u9700\u8981\u91cd\u5b9a\u4f4d\u7684\u521d\u59cb\u5316\u6570\u636e&#xff0c;\u4f46\u5728\u91cd\u5b9a\u4f4d\u5b8c\u6210\u540e\u4f1a\u88ab\u8bbe\u7f6e\u4e3a\u53ea\u8bfb\u72b6\u6001\u3002<\/p>\n<h4>2. \u4e3b\u8981\u529f\u80fd<\/h4>\n<ul>\n<li>\u5b58\u50a8\u9700\u8981\u91cd\u5b9a\u4f4d\u7684\u521d\u59cb\u5316\u6570\u636e<\/li>\n<li>\u5728\u7a0b\u5e8f\u52a0\u8f7d\u548c\u91cd\u5b9a\u4f4d\u5b8c\u6210\u540e&#xff0c;\u5c06\u8fd9\u90e8\u5206\u6570\u636e\u8bbe\u4e3a\u53ea\u8bfb&#xff0c;\u63d0\u9ad8\u5b89\u5168\u6027<\/li>\n<li>\u9632\u6b62\u653b\u51fb\u8005\u4fee\u6539\u8fd9\u4e9b\u91cd\u8981\u6570\u636e<\/li>\n<\/ul>\n<h4>3. \u4e0e RELRO \u4fdd\u62a4\u673a\u5236\u7684\u5173\u7cfb<\/h4>\n<p>.data.rel.ro \u8282\u4e0e RELRO&#xff08;Relocation Read-Only&#xff09;\u4fdd\u62a4\u673a\u5236\u5bc6\u5207\u76f8\u5173&#xff1a;<\/p>\n<li>\n<p>RELRO \u673a\u5236&#xff1a;<\/p>\n<ul>\n<li>RELRO \u662f\u4e00\u79cd\u5b89\u5168\u6280\u672f&#xff0c;\u901a\u8fc7\u5c06\u91cd\u5b9a\u4f4d\u540e\u7684\u6570\u636e\u6bb5\u8bbe\u4e3a\u53ea\u8bfb\u6765\u589e\u5f3a\u7a0b\u5e8f\u5b89\u5168\u6027<\/li>\n<li>\u5b83\u7531 GCC\u3001GNU linker \u548c Glibc-dynamic linker \u5171\u540c\u5b9e\u73b0<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>\u4e09\u79cd RELRO \u7ea7\u522b&#xff1a;<\/p>\n<ul>\n<li>No RELRO&#xff1a;\u5b8c\u5168\u5173\u95ed RELRO \u4fdd\u62a4<\/li>\n<li>Partial RELRO&#xff1a;\u90e8\u5206\u5f00\u542f&#xff0c;\u4e00\u4e9b\u8282\u533a&#xff08;\u5982 .init_array\u3001.fini_array\u3001.jcr\u3001.dynamic\u3001.got&#xff09;\u5728\u521d\u59cb\u5316\u540e\u88ab\u6807\u8bb0\u4e3a\u53ea\u8bfb<\/li>\n<li>Full RELRO&#xff1a;\u5b8c\u5168\u5f00\u542f&#xff0c;\u5728\u7a0b\u5e8f\u542f\u52a8\u65f6\u5c31\u89e3\u6790\u5e76\u7ed1\u5b9a\u6240\u6709\u52a8\u6001\u7b26\u53f7&#xff0c;\u4f7f\u66f4\u591a\u533a\u57df\u53d8\u4e3a\u53ea\u8bfb<\/li>\n<\/ul>\n<\/li>\n<h4>4. \u5305\u542b\u7684\u5185\u5bb9<\/h4>\n<p>.data.rel.ro \u8282\u901a\u5e38\u5305\u542b\u4ee5\u4e0b\u7c7b\u578b\u7684\u6570\u636e&#xff1a;<\/p>\n<ul>\n<li>\u9700\u8981\u91cd\u5b9a\u4f4d\u7684\u5168\u5c40\u53d8\u91cf<\/li>\n<li>\u4e0e GOT&#xff08;Global Offset Table&#xff09;\u76f8\u5173\u7684\u6570\u636e<\/li>\n<li>\u5176\u4ed6\u5728\u8fd0\u884c\u65f6\u9700\u8981\u91cd\u5b9a\u4f4d\u4f46\u5728\u91cd\u5b9a\u4f4d\u540e\u4e0d\u5e94\u88ab\u4fee\u6539\u7684\u6570\u636e<\/li>\n<\/ul>\n<h4>5. \u4e0e\u5176\u4ed6\u8282\u7684\u5173\u7cfb<\/h4>\n<li>\u4e0e .data\u8282&#xff1a;\u7c7b\u4f3c\u4e8e .data\u8282&#xff0c;\u4f46\u4f1a\u5728\u91cd\u5b9a\u4f4d\u540e\u53d8\u4e3a\u53ea\u8bfb<\/li>\n<li>\u4e0e .rodata\u8282&#xff1a;\u5982\u679c\u4e0d\u9700\u91cd\u5b9a\u4f4d&#xff0c;\u6570\u636e\u4f1a\u653e\u5728 .rodata\u4e2d&#xff0c;\u800c\u9700\u8981\u91cd\u5b9a\u4f4d\u7684\u6570\u636e\u5219\u653e\u5728 .data.rel.ro \u4e2d<\/li>\n<li>\u4e0e PT_GNU_RELRO \u6bb5&#xff1a;PT_GNU_RELRO \u7a0b\u5e8f\u5934\u6807\u8bc6\u4e86\u54ea\u4e9b\u6bb5\u5728\u91cd\u5b9a\u4f4d\u540e\u5e94\u8bbe\u4e3a\u53ea\u8bfb&#xff0c;.data.rel.ro \u901a\u5e38\u5305\u542b\u5728\u5176\u4e2d<\/li>\n<h4>6. \u5b89\u5168\u610f\u4e49<\/h4>\n<p>.data.rel.ro \u8282\u7684\u5f15\u5165\u4e3b\u8981\u662f\u51fa\u4e8e\u5b89\u5168\u8003\u8651&#xff1a;<\/p>\n<ul>\n<li>\u9632\u6b62\u653b\u51fb\u8005\u4fee\u6539\u91cd\u5b9a\u4f4d\u540e\u7684\u6570\u636e<\/li>\n<li>\u51cf\u5c11\u53ef\u7528\u4e8e\u653b\u51fb\u7684\u53ef\u5199\u5185\u5b58\u533a\u57df<\/li>\n<li>\u7279\u522b\u662f\u9632\u6b62\u5bf9 GOT&#xff08;Global Offset Table&#xff09;\u7684\u653b\u51fb<\/li>\n<\/ul>\n<h4>7. \u67e5\u770b .data.rel.ro \u8282\u7684\u65b9\u6cd5<\/h4>\n<p>\u60a8\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u67e5\u770b ELF \u6587\u4ef6\u4e2d\u7684 .data.rel.ro \u8282&#xff1a;<\/p>\n<p><span class=\"token comment\"># \u67e5\u770b\u8282\u4fe1\u606f<\/span><br \/>\nreadelf -S executable_file <span class=\"token operator\">|<\/span> <span class=\"token function\">grep<\/span> data.rel.ro<\/p>\n<p><span class=\"token comment\"># \u67e5\u770b\u7a0b\u5e8f\u5934\u4fe1\u606f&#xff0c;\u7279\u522b\u662f GNU_RELRO \u6bb5<\/span><br \/>\nreadelf -l executable_file <span class=\"token operator\">|<\/span> <span class=\"token function\">grep<\/span> GNU_RELRO<\/p>\n<p><span class=\"token comment\"># \u67e5\u770b\u8282\u5230\u6bb5\u7684\u6620\u5c04\u5173\u7cfb<\/span><br \/>\nreadelf -l executable_file<\/p>\n<p><span class=\"token comment\"># \u67e5\u770b RELRO \u4fdd\u62a4\u72b6\u6001<\/span><br \/>\nreadelf -l executable_file <span class=\"token operator\">|<\/span> <span class=\"token function\">grep<\/span> GNU_RELRO<\/p>\n<h4>8. \u5de5\u4f5c\u539f\u7406<\/h4>\n<li>\u5728\u7a0b\u5e8f\u52a0\u8f7d\u65f6&#xff0c;.data.rel.ro \u8282\u4f5c\u4e3a\u53ef\u5199\u6570\u636e\u52a0\u8f7d\u5230\u5185\u5b58\u4e2d<\/li>\n<li>\u52a8\u6001\u94fe\u63a5\u5668\u6267\u884c\u91cd\u5b9a\u4f4d\u64cd\u4f5c&#xff0c;\u66f4\u65b0\u8be5\u8282\u4e2d\u7684\u6307\u9488\u548c\u5730\u5740<\/li>\n<li>\u91cd\u5b9a\u4f4d\u5b8c\u6210\u540e&#xff0c;\u94fe\u63a5\u5668\u5c06\u8be5\u8282\u7684\u5185\u5b58\u9875\u5c5e\u6027\u6539\u4e3a\u53ea\u8bfb<\/li>\n<li>\u7a0b\u5e8f\u8fd0\u884c\u8fc7\u7a0b\u4e2d&#xff0c;\u8fd9\u90e8\u5206\u6570\u636e\u65e0\u6cd5\u518d\u88ab\u4fee\u6539<\/li>\n<h4>9. \u5b9e\u9645\u5e94\u7528\u793a\u4f8b<\/h4>\n<p>\u5728\u73b0\u4ee3 Linux \u7cfb\u7edf\u4e2d&#xff0c;\u5927\u591a\u6570\u4f7f\u7528 GCC \u7f16\u8bd1\u7684\u7a0b\u5e8f\u90fd\u4f1a\u9ed8\u8ba4\u542f\u7528 Partial RELRO&#xff0c;\u5176\u4e2d\u5c31\u5305\u62ec .data.rel.ro \u8282\u7684\u5904\u7406\u3002\u8fd9\u5bf9\u4e8e\u63d0\u9ad8\u7a0b\u5e8f\u5b89\u5168\u6027\u975e\u5e38\u6709\u5e2e\u52a9&#xff0c;\u7279\u522b\u662f\u5728\u9632\u6b62\u67d0\u4e9b\u7c7b\u578b\u7684\u5185\u5b58\u653b\u51fb\u65b9\u9762\u3002<\/p>\n<p>\u603b\u7684\u6765\u8bf4&#xff0c;.data.rel.ro \u8282\u662f\u73b0\u4ee3 ELF \u6587\u4ef6\u683c\u5f0f\u548c\u5b89\u5168\u673a\u5236\u7684\u91cd\u8981\u7ec4\u6210\u90e8\u5206&#xff0c;\u5b83\u901a\u8fc7\u5728\u91cd\u5b9a\u4f4d\u5b8c\u6210\u540e\u5c06\u6570\u636e\u8bbe\u4e3a\u53ea\u8bfb\u7684\u65b9\u5f0f&#xff0c;\u63d0\u9ad8\u4e86\u7a0b\u5e8f\u7684\u5b89\u5168\u6027&#xff0c;\u662f RELRO \u4fdd\u62a4\u673a\u5236\u7684\u5173\u952e\u5b9e\u73b0\u4e4b\u4e00\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>.data.rel.ro \u8282\u8be6\u89e3<br \/>\n.data.rel.ro \u8282&#xff08;Read-Only Data After Relocation&#xff09;\u662f ELF \u6587\u4ef6\u4e2d\u7684\u4e00\u4e2a\u7279\u6b8a\u8282\u533a&#xff0c;\u7528\u4e8e\u5b58\u50a8\u5728\u91cd\u5b9a\u4f4d\u5b8c\u6210\u540e\u5e94\u8bbe\u4e3a\u53ea\u8bfb\u7684\u6570\u636e\u3002<br \/>\n1. \u57fa\u672c\u6982\u5ff5<br \/>\n.data.rel.ro \u8282\u5168\u79f0\u662f \u201cRead-Only Data After Relocation\u201d&#xff0c;\u5b83\u662f\u4e00\u4e2a\u7279\u6b8a\u7684\u6570\u636e\u8282&#xff0c;\u5305\u542b\u9700\u8981\u91cd\u5b9a\u4f4d\u7684\u521d\u59cb\u5316\u6570\u636e&#xff0c;\u4f46\u5728\u91cd\u5b9a\u4f4d\u5b8c\u6210\u540e<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[7444,1054,1748],"topic":[],"class_list":["post-70791","post","type-post","status-publish","format-standard","hentry","category-server","tag-elf","tag-c-c","tag-linux"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.3 - 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