{"id":117,"date":"2026-03-19T15:54:40","date_gmt":"2026-03-19T07:54:40","guid":{"rendered":"http:\/\/8.210.123.186\/?p=117"},"modified":"2026-03-19T15:54:42","modified_gmt":"2026-03-19T07:54:42","slug":"elf%e6%96%87%e4%bb%b6","status":"publish","type":"post","link":"http:\/\/8.210.123.186\/index.php\/2026\/03\/19\/elf%e6%96%87%e4%bb%b6\/","title":{"rendered":"ELF\u6587\u4ef6"},"content":{"rendered":"\n<h1 class=\"wp-block-heading\">ELF<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">\u6bd4\u8d77PE\uff0cELF\u5206\u4e86section\u7ed9\u7f16\u8bd1\u5668\u548csegment\u7ed9\u52a0\u8f7d\u5668\uff0c\u5904\u7406\u5916\u90e8\u51fd\u6570\u7684\u65f6\u5019\u8c03\u7528\u4e86GOT\/PLT\uff08\u5ef6\u8fdf\u7ed1\u5b9a\uff09\uff0cPE\u5219\u7528\u7684IAT<br>elf\u683c\u5f0f\u7531system v\u6807\u51c6\u5b9a\u4e49\uff0c\u8bbe\u8ba1\u66f4\u7075\u6d3b\uff0c\u652f\u6301\u53ef\u6267\u884c\u6587\u4ef6\uff0c\u5171\u4eab\u5e93\uff0c\u76ee\u6807\u6587\u4ef6\u7b49\u591a\u79cd\u7c7b\u578b<br>\u5e38\u89c1\u4f7f\u7528\u573a\u666f\uff0c\u53ef\u6267\u884c\u6587\u4ef6\uff0c \u5f53\u8fd0\u884cLinux Shell\u4e0a\u7684\u5404\u79cd\u547d\u4ee4\u65f6(ls, grep) \u65f6, \u90fd\u662f\u6267\u884c\u7684ELF\u683c\u5f0f\u7684\u6587\u4ef6. \u5176\u5305\u542b\u7a0b\u5e8f\u7684\u673a\u5668\u4ee3\u7801\u548c\u5fc5\u8981\u7684\u5143\u6570\u636e, \u5b9a\u4e49\u5165\u53e3\u70b9\u3001\u7a0b\u5e8f\u5934\u8868\u7b49\u6267\u884c\u6240\u9700\u4fe1\u606f, \u52a0\u8f7d\u5668(loader)\u80fd\u76f4\u63a5\u5c06\u5176\u6620\u5c04\u5230\u5185\u5b58\u5e76\u6267\u884c.<br>\u5e38\u89c1\u540e\u7f00<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u65e0\u540e\u7f00\u6216.bin\uff0c\u53ef\u6267\u884c\u6587\u4ef6\u5982\/bin\/ls\u3001\/usr\/bin\/python3\uff0c\u901a\u5e38\u65e0\u540e\u7f00<\/li>\n\n\n\n<li>.so\uff0c\u52a8\u6001\u5e93\/\u5171\u4eab\u5e93\uff0c\u5171\u4eab\u5bf9\u8c61\uff0c\u7c7b\u4f3cwindows\u7684dll\uff0c\u63d0\u4f9b\u52a8\u6001\u94fe\u63a5\u529f\u80fd\uff08\u5141\u8bb8\u591a\u4e2a\u7a0b\u5e8f\u5171\u4eab\u540c\u4e00\u4efd\u4ee3\u7801\uff0c\u8282\u7701\u5185\u5b58\uff0c\u7a0b\u5e8f\u8fd0\u884c\u65f6\u624d\u52a0\u8f7d\u6240\u9700\u5e93\uff09<br>\u8865\uff1a<br>\u52a8\u6001\u5e93\u548c\u5171\u4eab\u5e93\u672c\u8d28\u662f\u540c\u4e00\u4e2a\u4e1c\u897f\uff0c\u4f8b\u5982\u5728windows\u4e0b\u7684.dll\u52a8\u6001\u94fe\u63a5\u5e93<\/li>\n\n\n\n<li>.a,\u9759\u6001\u94fe\u63a5\u5e93\uff0c\u5305\u542b\u591a\u4e2a\u76ee\u6807\u6587\u4ef6\uff08.o\uff09\u5f52\u6863\u96c6\u5408\uff0c\u7f16\u8bd1\u65f6\u4f1a\u88ab\u5b8c\u6574\u5d4c\u5165\u53ef\u6267\u884c\u6587\u4ef6\uff0c\u5728\u94fe\u63a5\u65f6\u76f8\u5173\u4ee3\u7801\u4f1a\u88ab\u76f4\u63a5\u5c06\u590d\u5236\u5230\u6700\u7ec8\u7684\u53ef\u6267\u884c\u6587\u4ef6\u4e2d\uff0c\u56e0\u6b64\u90e8\u7f72\u66f4\u7b80\u5355\uff0c\u4e0d\u4f9d\u8d56\u5916\u90e8\u5e93<\/li>\n\n\n\n<li>.o,\u76ee\u6807\u6587\u4ef6\uff0c\u7f16\u8bd1\u5668\u8f93\u51fa\u7684\u4e2d\u95f4\u6587\u4ef6\uff08\u7f16\u8bd1\u4f46\u672a\u94fe\u63a5\uff0c\u5305\u542b\u7f16\u8bd1\u540e\u7684\u673a\u5668\u4ee3\u7801\uff0c\u4f46\u4e0d\u80fd\u76f4\u63a5\u6267\u884c\uff09\uff0c\u4fdd\u5b58\u4e86\u7b26\u53f7\u8868\uff0c\u91cd\u5b9a\u4f4d\u4fe1\u606f\u7b49\u5f85\u94fe\u63a5\u5668\u5904\u7406\uff0c\u8981\u94fe\u63a5\u5668\u5904\u7406\u540e\u751f\u6210\u53ef\u6267\u884c\u6587\u4ef6Dynamic Link Library\uff0c\u5728linux\/unix\u4e0b\u7684.so\u5171\u4eab\u5bf9\u8c61\uff08shared object\uff09\u94fe\u63a5\u5668\u6700\u7ec8\u5c06\u591a\u4e2a.o\u6587\u4ef6\u5408\u5e76\u4e3a\u53ef\u6267\u884c\u6587\u4ef6\u6216\u5171\u4eab\u5e93\uff0c\u76ee\u6807\u6587\u4ef6\u5141\u8bb8\u5206\u79bb\u7f16\u8bd1\uff0c\u63d0\u9ad8\u5927\u578b\u9879\u76ee\u7684\u6548\u7387<\/li>\n\n\n\n<li>.ko\uff0c\u5185\u6838\u6a21\u5757\uff0clinux\u5185\u6838\u7684\u9a71\u52a8\u7a0b\u5e8f\uff0c\u8fd0\u884c\u4e8e\u5185\u6838\u7a7a\u95f4\uff0c\u76f8\u5f53\u4e8ewindow\u91cc\u9762\u7684.sys\uff08\u9a71\u52a8\u7a0b\u5e8f\uff09\uff0c\u8fd0\u884c\u5728ring 0(\u6700\u9ad8\u6743\u9650)\uff0c\u6bd4\u8d77\u666e\u901aelf\uff0cko\u9a71\u52a8\u6ca1\u6709main\uff0c\u53ea\u6709module_init()\uff08\u63d2\u5165\u6a21\u5757\u65f6\u6267\u884c\uff09\u548c\u5bf9\u5e94\u7684exit\uff0c\u4f1a\u770b\u5230\u5927\u91cf\u91cd\u5b9a\u4f4d\u8868\uff0c\u56e0\u4e3a\u8981\u88ab\u201c\u94fe\u63a5\u201d\u8fdb\u5185\u6838<\/li>\n\n\n\n<li>.mod\uff0c\u90e8\u5206\u7cfb\u7edf\u7684\u6a21\u5757\u6587\u4ef6\uff0c\u5982\u65e9\u671funix\u529f\u80fd\u7c7b\u4f3cko\uff0c\u5305\u542b\u4e86\u6a21\u5757\u7684\u7248\u672c\u4fe1\u606f\uff08Version Magic\uff09\u548c\u7b26\u53f7\u4f9d\u8d56\u5173\u7cfb\u3002<\/li>\n\n\n\n<li>coredump\u5185\u5b58\u8f6c\u50a8\u6587\u4ef6\uff1a\u7cfb\u7edf\u5d29\u6e83\u6216\u7a0b\u5e8f\u5f02\u5e38\u7ec8\u6b62\u65f6\u751f\u6210\u7684\u8c03\u8bd5\u4fe1\u606f\uff0c\u8bb0\u5f55\u7a0b\u5e8f\u5d29\u6e83\u65f6\u7684\u5185\u5b58\u72b6\u6001\uff0c\u5bc4\u5b58\u5668\u503c\u7b49\u4fe1\u606f<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">\u6570\u636e\u5f62\u5f0f<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">ELF\u6587\u4ef6\u683c\u5f0f\u652f\u63018\u4f4d\/32\u4f4d\u4f53\u7cfb\u7ed3\u6784\u3002\u5f53\u7136\uff0c\u8fd9\u79cd\u683c\u5f0f\u662f\u53ef\u4ee5\u6269\u5c55\u7684\uff0c\u4e5f\u53ef\u4ee5\u652f\u6301\u66f4\u5c0f\u7684\u6216\u8005\u66f4\u5927\u4f4d\u6570\u7684\u5904\u7406\u5668\u67b6\u6784\u3002\u56e0\u6b64\uff0c\u76ee\u6807\u6587\u4ef6\u4f1a\u5305\u542b\u4e00\u4e9b\u63a7\u5236\u6570\u636e\uff0c\u8fd9\u90e8\u5206\u6570\u636e\u8868\u660e\u4e86\u76ee\u6807\u6587\u4ef6\u6240\u4f7f\u7528\u7684\u67b6\u6784\uff0c\u8fd9\u4e5f\u4f7f\u5f97\u5b83\u53ef\u4ee5\u88ab\u901a\u7528\u7684\u65b9\u5f0f\u6765\u8bc6\u522b\u548c\u89e3\u91ca\u3002\u76ee\u6807\u6587\u4ef6\u4e2d\u7684\u5176\u5b83\u6570\u636e\u91c7\u7528\u76ee\u7684\u5904\u7406\u5668\u7684\u683c\u5f0f\u8fdb\u884c\u7f16\u7801\uff0c\u4e0e\u5728\u4f55\u79cd\u673a\u5668\u4e0a\u521b\u5efa\u6ca1\u6709\u5173\u7cfb\u3002\u8fd9\u91cc\u5176\u5b9e\u60f3\u8868\u660e\u7684\u610f\u601d\u76ee\u6807\u6587\u4ef6\u53ef\u4ee5\u8fdb\u884c\u4ea4\u53c9\u7f16\u8bd1\uff0c\u6211\u4eec\u53ef\u4ee5\u5728x86\u5e73\u53f0\u751f\u6210arm\u5e73\u53f0\u7684\u53ef\u6267\u884c\u4ee3\u7801<br>\u76ee\u6807\u6587\u4ef6\u4e2d\u7684\u6240\u6709\u6570\u636e\u7ed3\u6784\u90fd\u9075\u4ece\u201c\u81ea\u7136\u201d\u5927\u5c0f\u548c\u5bf9\u9f50\u89c4\u5219\u3002\u5982\u4e0b<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u540d\u79f0<\/th><th>\u957f\u5ea6<\/th><th>\u5bf9\u9f50\u65b9\u5f0f<\/th><th>\u7528\u9014<\/th><\/tr><\/thead><tbody><tr><td>Elf32_Addr<\/td><td>4<\/td><td>4<\/td><td>\u65e0\u7b26\u53f7\u7a0b\u5e8f\u5730\u5740<\/td><\/tr><tr><td>Elf32_Half<\/td><td>2<\/td><td>2<\/td><td>\u65e0\u7b26\u53f7\u534a\u6574\u578b<\/td><\/tr><tr><td>Elf32_Off<\/td><td>4<\/td><td>4<\/td><td>\u65e0\u7b26\u53f7\u6587\u4ef6\u504f\u79fb<\/td><\/tr><tr><td>Elf32_Sword<\/td><td>4<\/td><td>4<\/td><td>\u6709\u7b26\u53f7\u5927\u6574\u578b<\/td><\/tr><tr><td>Elf32_Word<\/td><td>4<\/td><td>4<\/td><td>\u65e0\u7b26\u53f7\u5927\u6574\u578b<\/td><\/tr><tr><td>unsigned char<\/td><td>1<\/td><td>1<\/td><td>\u65e0\u7b26\u53f7\u5c0f\u6574\u578b<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u5982\u679c\u5fc5\u8981\uff0c\u6570\u636e\u7ed3\u6784\u53ef\u4ee5\u5305\u542b\u663e\u5f0f\u5730\u8865\u9f50\u6765\u786e\u4fdd4\u5b57\u8282\u5bf9\u8c61\u63094\u5b57\u8282\u5bf9\u9f50\uff0c\u5f3a\u5236\u6570\u636e\u7ed3\u6784\u7684\u5927\u5c0f\u662f4\u7684\u6574\u6570\u500d\u7b49\u7b49\u3002\u6570\u636e\u540c\u6837\u9002\u7528\u662f\u5bf9\u9f50\u7684\u3002\u56e0\u6b64\uff0c\u5305\u542b\u4e00\u4e2aElf32_Addr\u7c7b\u578b\u6210\u5458\u7684\u7ed3\u6784\u4f53\u4f1a\u5728\u6587\u4ef6\u4e2d\u76844\u5b57\u8282\u8fb9\u754c\u5904\u5bf9\u9f50\u3002<br>\u4e3a\u4e86\u5177\u6709\u53ef\u79fb\u690d\u6027\uff0cELF\u6587\u4ef6\u4e0d\u4f7f\u7528\u4f4d\u57df\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u7ed3\u6784<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u533a\u57df\u4f4d\u7f6e<\/th><th>\u7ec4\u4ef6\u540d\u79f0 (\u4e2d\u6587)<\/th><th>\u82f1\u6587\u5bf9\u5e94<\/th><th>\u8bf4\u660e<\/th><\/tr><\/thead><tbody><tr><td><strong>\u9876\u90e8<\/strong><\/td><td><strong>ELF \u6587\u4ef6\u5934<\/strong><\/td><td>ELF Header<\/td><td>\u6587\u4ef6\u7684\u603b\u7d22\u5f15\uff0c\u5305\u542b\u9b54\u6570\u3001\u7248\u672c\u7b49\u3002<\/td><\/tr><tr><td><strong>\u4e0a\u90e8<\/strong><\/td><td><strong>\u7a0b\u5e8f\u5934\u90e8\u8868<\/strong><\/td><td>Program Header Table<\/td><td>\u63cf\u8ff0\u6bb5\uff08Segment\uff09\u4fe1\u606f\uff0c\u7528\u4e8e\u6267\u884c\u89c6\u56fe\u3002<\/td><\/tr><tr><td><strong>\u4e2d\u90e8<\/strong><\/td><td><strong>.text<\/strong><\/td><td>Code Section<\/td><td>\u4ee3\u7801\u8282\uff08\u6307\u4ee4\uff09\u3002<\/td><\/tr><tr><td><strong>\u4e2d\u90e8<\/strong><\/td><td><strong>.data<\/strong><\/td><td>Data Section<\/td><td>\u6570\u636e\u8282\uff08\u5df2\u521d\u59cb\u5316\u5168\u5c40\u53d8\u91cf\uff09\u3002<\/td><\/tr><tr><td><strong>\u4e2d\u90e8<\/strong><\/td><td><strong>.bss<\/strong><\/td><td>BSS Section<\/td><td>\u672a\u521d\u59cb\u5316\u6570\u636e\u8282\u3002<\/td><\/tr><tr><td><strong>\u4e2d\u90e8<\/strong><\/td><td><strong>.symtab<\/strong><\/td><td>Symbol Table<\/td><td>\u7b26\u53f7\u8868\uff08\u51fd\u6570\u540d\u3001\u53d8\u91cf\u540d\uff09\u3002<\/td><\/tr><tr><td><strong>\u4e2d\u90e8<\/strong><\/td><td><strong>.debug<\/strong><\/td><td>Debug Info<\/td><td>\u8c03\u8bd5\u4fe1\u606f\u3002<\/td><\/tr><tr><td><strong>\u4e2d\u90e8<\/strong><\/td><td><strong>.line<\/strong><\/td><td>Line Number Table<\/td><td>\u884c\u53f7\u8868\uff08\u6e90\u7801\u884c\u53f7\u5bf9\u5e94\uff09\u3002<\/td><\/tr><tr><td><strong>\u4e2d\u90e8<\/strong><\/td><td><strong>&#8230;<\/strong><\/td><td>Others<\/td><td>\u5176\u4ed6\u5404\u7c7b\u8282\u3002<\/td><\/tr><tr><td><strong>\u5e95\u90e8<\/strong><\/td><td><strong>\u8282\u533a\u5934\u90e8\u8868<\/strong><\/td><td>Section Header Table<\/td><td>\u63cf\u8ff0\u8282\uff08Section\uff09\u4fe1\u606f\uff0c\u94fe\u63a5\u89c6\u56fe\u7684\u6838\u5fc3\uff0c\u8bb0\u5f55\u4e86\u4e0a\u9762\u6240\u6709\u8282\u7684\u4f4d\u7f6e\u3002<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">ELF\u5934\u90e8<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u6587\u4ef6\u8d77\u59cb\u4f4d\u7f6e\uff0c\u56fa\u5b9a\u5927\u5c0f\uff0832\u4f4d\u4e3a52\u5b57\u8282\uff0c64\u4f4d\u4f4d64\u5b57\u8282\uff09<br>\u7ed3\u6784\u4f53<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>#define EI_NIDENT 16\ntypedef struct {\n    unsigned char e_ident&#91;EI_NIDENT];  \/\/ ELF\u6807\u8bc6\u7b26\n    Elf32_Half    e_type;             \/\/ \u6587\u4ef6\u7c7b\u578b\n    Elf32_Half    e_machine;          \/\/ \u76ee\u6807\u67b6\u6784\n    Elf32_Word    e_version;          \/\/ ELF\u7248\u672c\n    Elf32_Addr    e_entry;            \/\/ \u7a0b\u5e8f\u5165\u53e3\u70b9\n    Elf32_Off     e_phoff;            \/\/ \u7a0b\u5e8f\u5934\u8868\u504f\u79fb\n    Elf32_Off     e_shoff;            \/\/ \u8282\u5934\u8868\u504f\u79fb\n    Elf32_Word    e_flags;            \/\/ \u5904\u7406\u5668\u7279\u5b9a\u6807\u5fd7\n    Elf32_Half    e_ehsize;           \/\/ ELF\u5934\u90e8\u5927\u5c0f\n    Elf32_Half    e_phentsize;        \/\/ \u7a0b\u5e8f\u5934\u8868\u9879\u5927\u5c0f\n    Elf32_Half    e_phnum;            \/\/ \u7a0b\u5e8f\u5934\u8868\u9879\u6570\u91cf\n    Elf32_Half    e_shentsize;        \/\/ \u8282\u5934\u8868\u9879\u5927\u5c0f\n    Elf32_Half    e_shnum;            \/\/ \u8282\u5934\u8868\u9879\u6570\u91cf\n    Elf32_Half    e_shstrndx;         \/\/ \u8282\u540d\u79f0\u5b57\u7b26\u4e32\u8868\u7d22\u5f15\n} Elf32_Ehdr;\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u5176\u4e2d\uff0ce_ident\u5b57\u6bb5\u7684\u524d4\u4e2a\u5b57\u8282\u56fa\u5b9a\u4e3a0x7f\u3001&#8217;E&#8217;\u3001&#8217;L&#8217;\u3001&#8217;F&#8217;\uff0c\u8fd9\u662fELF\u6587\u4ef6\u7684\u9b54\u6570\u6807\u8bc6\u3002ascll\u7801\uff0845 4C 46\uff09<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">e_ident<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">ELF\u63d0\u4f9b\u4e86\u4e00\u4e2a\u76ee\u6807\u6587\u4ef6\u6846\u67b6\uff0c\u4ee5\u4fbf\u4e8e\u652f\u6301\u591a\u79cd\u5904\u7406\u5668\uff0c\u591a\u79cd\u7f16\u7801\u683c\u5f0f\u7684\u673a\u5668\u3002\u8be5\u53d8\u91cf\u7ed9\u51fa\u4e86\u7528\u4e8e\u89e3\u7801\u548c\u89e3\u91ca\u6587\u4ef6\u4e2d\u4e0e\u673a\u5668\u65e0\u5173\u7684\u6570\u636e\u7684\u65b9\u5f0f\u3002\u8fd9\u4e2a\u6570\u7ec4\u5bf9\u4e8e\u4e0d\u540c\u7684\u4e0b\u6807\u7684\u542b\u4e49\u5982\u4e0b<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u5b8f\u540d\u79f0<\/th><th>\u4e0b\u6807<\/th><th>\u76ee\u7684<\/th><\/tr><\/thead><tbody><tr><td>EI_MAG0<\/td><td>0<\/td><td>\u6587\u4ef6\u6807\u8bc6<\/td><\/tr><tr><td>EI_MAG1<\/td><td>1<\/td><td>\u6587\u4ef6\u6807\u8bc6<\/td><\/tr><tr><td>EI_MAG2<\/td><td>2<\/td><td>\u6587\u4ef6\u6807\u8bc6<\/td><\/tr><tr><td>EI_MAG3<\/td><td>3<\/td><td>\u6587\u4ef6\u6807\u8bc6<\/td><\/tr><tr><td>EI_CLASS<\/td><td>4<\/td><td>\u6587\u4ef6\u7c7b<\/td><\/tr><tr><td>EI_DATA<\/td><td>5<\/td><td>\u6570\u636e\u7f16\u7801<\/td><\/tr><tr><td>EI_VERSION<\/td><td>6<\/td><td>\u6587\u4ef6\u7248\u672c<\/td><\/tr><tr><td>EI_PAD<\/td><td>7<\/td><td>\u8865\u9f50\u5b57\u8282\u5f00\u59cb\u5904<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">e_ident[EI_MAG0]\u5230e_ident[EI_MAG3]\uff0c\u5373\u6587\u4ef6\u7684\u59344\u4e2a\u5b57\u8282\uff0c\u88ab\u79f0\u4f5c\u201c\u9b54\u6570\u201d\uff0c\u6807\u8bc6\u8be5\u6587\u4ef6\u662f\u4e00\u4e2aELF\u76ee\u6807\u6587\u4ef6\uff0c\u5728ASCII\u7801\u8868\u4e2d\uff0c0x7f\u7684\u542b\u4e49\u662fDEL\uff08\u5220\u9664\u63a7\u5236\u7b26\uff09 \u3002\u8fd9\u662f\u4e00\u4e2a\u4e0d\u53ef\u6253\u5370\u7684\u63a7\u5236\u5b57\u7b26\u3002<br>\u4f7f\u75280x7f\u7684\u539f\u56e0\u6709\u4e00\u662f\u4e3a\u4e86\u533a\u5206\u811a\u672c\u4e0e\u4e8c\u8fdb\u5236\uff1a Linux\/Unix \u4e2d\u6709\u5f88\u591a\u4ee5\u6587\u672c\u5f62\u5f0f\u5b58\u5728\u7684\u53ef\u6267\u884c\u811a\u672c\uff08\u6bd4\u5982Shell\u6216Python\uff09\uff0c\u5b83\u4eec\u5927\u90e8\u5206\u4ee5\u53ef\u6253\u5370\u5b57\u7b26 #!\uff08Shebang\uff09\u5f00\u5934\u3002\u800cELF\u6587\u4ef6\u4f5c\u4e3a\u7eaf\u7cb9\u7684\u4e8c\u8fdb\u5236\u6587\u4ef6\uff0c\u75280x7f\u5f00\u5934\u53ef\u4ee5\u77ac\u95f4\u4e0e\u811a\u672c\u533a\u5206\u5f00\u6765\u3002<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u540d\u79f0<\/th><th>\u503c<\/th><th>\u4f4d\u7f6e<\/th><\/tr><\/thead><tbody><tr><td>ELFMAG0<\/td><td>0x7f<\/td><td>e_ident[EI_MAG0]<\/td><\/tr><tr><td>ELFMAG1<\/td><td>\u2018E\u2019<\/td><td>e_ident[EI_MAG1]<\/td><\/tr><tr><td>ELFMAG2<\/td><td>\u2018L\u2019<\/td><td>e_ident[EI_MAG2]<\/td><\/tr><tr><td>ELFMAG3<\/td><td>\u2018F\u2019<\/td><td>e_ident[EI_MAG3]<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">e_ident[EI_CLASS] \u4e3a e_ident[EI_MAG3]\u7684\u4e0b\u4e00\u4e2a\u5b57\u8282\uff0c\u6807\u8bc6\u6587\u4ef6\u7684\u7c7b\u578b\u6216\u5bb9\u91cf\u3002<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u540d\u79f0<\/th><th>\u503c<\/th><th>\u610f\u4e49<\/th><\/tr><\/thead><tbody><tr><td>ELFCLASSNONE<\/td><td>0<\/td><td>\u65e0\u6548\u7c7b\u578b<\/td><\/tr><tr><td>ELFCLASS32<\/td><td>1<\/td><td>32\u4f4d\u6587\u4ef6<\/td><\/tr><tr><td>ELFCLASS64<\/td><td>2<\/td><td>64\u4f4d\u6587\u4ef6<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">ELF\u6587\u4ef6\u7684\u8bbe\u8ba1\u4f7f\u5f97\u5b83\u53ef\u4ee5\u5728\u591a\u79cd\u5b57\u8282\u957f\u5ea6\u7684\u673a\u5668\u4e4b\u95f4\u79fb\u690d\uff0c\u800c\u4e0d\u9700\u8981\u5f3a\u5236\u89c4\u5b9a\u673a\u5668\u7684\u6700\u957f\u5b57\u8282\u957f\u5ea6\u548c\u6700\u77ed\u5b57\u8282\u957f\u5ea6\u3002ELFCLASS32\u7c7b\u578b\u652f\u6301\u6587\u4ef6\u5927\u5c0f\u548c\u865a\u62df\u5730\u5740\u7a7a\u95f4\u4e0a\u9650\u4e3a4GB\u7684\u673a\u5668\uff1b\u5b83\u4f7f\u7528\u4e0a\u8ff0\u5b9a\u4e49\u4e2d\u7684\u57fa\u672c\u7c7b\u578b\u3002<br>ELFCLASS64\u7c7b\u578b\u7528\u4e8e64\u4f4d\u67b6\u6784\u3002<br>e_ident[EI_DATA]\u5b57\u8282\u7ed9\u51fa\u4e86\u76ee\u6807\u6587\u4ef6\u4e2d\u7684\u7279\u5b9a\u5904\u7406\u5668\u6570\u636e\u7684\u7f16\u7801\u65b9\u5f0f\u3002\u4e0b\u9762\u662f\u76ee\u524d\u5df2\u5b9a\u4e49\u7684\u7f16\u7801<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u540d\u79f0<\/th><th>\u503c<\/th><th>\u610f\u4e49<\/th><\/tr><\/thead><tbody><tr><td>ELFDATANONE<\/td><td>0<\/td><td>\u65e0\u6548\u6570\u636e\u7f16\u7801<\/td><\/tr><tr><td>ELFDATA2LSB<\/td><td>1<\/td><td>\u5c0f\u7aef<\/td><\/tr><tr><td>ELFDATA2MSB<\/td><td>2<\/td><td>\u5927\u7aef<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u5176\u5b83\u503c\u88ab\u4fdd\u7559\uff0c\u5728\u672a\u6765\u5fc5\u8981\u65f6\u5c06\u88ab\u8d4b\u4e88\u65b0\u7684\u7f16\u7801\u3002<br>\u6587\u4ef6\u6570\u636e\u7f16\u7801\u65b9\u5f0f\u8868\u660e\u4e86\u6587\u4ef6\u5185\u5bb9\u7684\u89e3\u6790\u65b9\u5f0f\u3002\u6b63\u5982\u4e4b\u524d\u6240\u8ff0\uff0cELFCLASS32\u7c7b\u578b\u6587\u4ef6\u4f7f\u7528\u4e86\u5177\u67091\uff0c2\u548c4\u5b57\u8282\u7684\u53d8\u91cf\u7c7b\u578b\u3002\u5bf9\u4e8e\u5df2\u5b9a\u4e49\u7684\u4e0d\u540c\u7684\u7f16\u7801\u65b9\u5f0f\uff0c\u5176\u8868\u793a\u5982\u4e0b\u6240\u793a\uff0c\u5176\u4e2d\u5b57\u8282\u53f7\u5728\u5de6\u4e0a\u89d2\u3002<br>ELFDATA2LSB\u7f16\u7801\u4f7f\u7528\u8865\u7801\uff0c\u6700\u4f4e\u6709\u6548\u4f4d\uff08Least Significant Byte\uff09\u5360\u7528\u6700\u4f4e\u5730\u5740<br><\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/8.210.123.186\/wp-content\/uploads\/2026\/03\/image-8.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"586\" height=\"309\" data-original=\"http:\/\/8.210.123.186\/wp-content\/uploads\/2026\/03\/image-8.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-118\"  sizes=\"auto, (max-width: 586px) 100vw, 586px\" \/><\/div><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><br>ELFDATA2MSB\u7f16\u7801\u4f7f\u7528\u8865\u7801\uff0c\u6700\u9ad8\u6709\u6548\u4f4d\uff08Most Significant Byte\uff09\u5360\u7528\u6700\u4f4e\u5730\u5740<br><\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/8.210.123.186\/wp-content\/uploads\/2026\/03\/image-9.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"584\" height=\"301\" data-original=\"http:\/\/8.210.123.186\/wp-content\/uploads\/2026\/03\/image-9.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-119\"  sizes=\"auto, (max-width: 584px) 100vw, 584px\" \/><\/div><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><br>e_ident[EI_DATA] \u7ed9\u51fa\u4e86ELF\u5934\u7684\u7248\u672c\u53f7\u3002\u76ee\u524d\u8fd9\u4e2a\u503c\u5fc5\u987b\u662fEV_CURRENT\uff0c\u5373\u4e4b\u524d\u5df2\u7ecf\u7ed9\u51fa\u7684e_version\u3002<br>e_ident[EI_PAD] \u7ed9\u51fa\u4e86 e_ident \u4e2d\u672a\u4f7f\u7528\u5b57\u8282\u7684\u5f00\u59cb\u5730\u5740\u3002\u8fd9\u4e9b\u5b57\u8282\u88ab\u4fdd\u7559\u5e76\u7f6e\u4e3a0\uff1b\u5904\u7406\u76ee\u6807\u6587\u4ef6\u7684\u7a0b\u5e8f\u5e94\u8be5\u5ffd\u7565\u5b83\u4eec\u3002\u5982\u679c\u4e4b\u540e\u8fd9\u4e9b\u5b57\u8282\u88ab\u4f7f\u7528\uff0cEI_PAD\u7684\u503c\u5c31\u4f1a\u6539\u53d8\u3002<br>\u8865\uff1a<br>ELF \u6587\u4ef6\u5934\u7528\u4e8e\u63cf\u8ff0\u6574\u4e2a\u6587\u4ef6\u7684\u6574\u4f53\u7ed3\u6784\u548c\u57fa\u672c\u5c5e\u6027\u3002\u5b57\u6bb5\u547d\u540d\u6709\u7740\u660e\u663e\u7684\u7f29\u5199\u89c4\u5f8b\uff0c\u901a\u5e38\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>ph<\/code> = Program Header (\u7a0b\u5e8f\u5934\u90e8\u8868\uff0c\u63cf\u8ff0\u8fd0\u884c\u65f6\u5185\u5b58\u5e03\u5c40)<\/li>\n\n\n\n<li><code>sh<\/code> = Section Header (\u8282\u533a\u5934\u90e8\u8868\uff0c\u63cf\u8ff0\u94fe\u63a5\u65f6\u7684\u6570\u636e\u533a\u5757)<\/li>\n\n\n\n<li><code>ent<\/code> = Entry (\u8868\u9879)<\/li>\n\n\n\n<li><code>num<\/code> = Number (\u6570\u91cf)<\/li>\n\n\n\n<li><code>off<\/code> = Offset (\u504f\u79fb\u91cf)<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">e_type<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u6807\u8bc6\u76ee\u6807\u6587\u4ef6\u7684\u5177\u4f53\u7c7b\u578b\u3002<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u540d\u79f0<\/th><th>\u503c<\/th><th>\u542b\u4e49<\/th><th>\u89e3\u91ca<\/th><\/tr><\/thead><tbody><tr><td><strong>ET_NONE<\/strong><\/td><td>0<\/td><td>\u672a\u77e5\u7c7b\u578b<\/td><td>\u672a\u786e\u5b9a\u7684\u6587\u4ef6\u683c\u5f0f<\/td><\/tr><tr><td><strong>ET_REL<\/strong><\/td><td>1<\/td><td>\u53ef\u91cd\u5b9a\u4f4d\u6587\u4ef6 (.o)<\/td><td>\u4f9b\u94fe\u63a5\u5668\u4f7f\u7528\u7684\u76ee\u6807\u6587\u4ef6\uff0c\u5982 <code>gcc -c<\/code> \u7f16\u8bd1\u4ea7\u7269<\/td><\/tr><tr><td><strong>ET_EXEC<\/strong><\/td><td>2<\/td><td>\u53ef\u6267\u884c\u6587\u4ef6<\/td><td>\u53ef\u4ee5\u76f4\u63a5\u6295\u5165\u5185\u5b58\u8fd0\u884c\u7684\u72ec\u7acb\u7a0b\u5e8f<\/td><\/tr><tr><td><strong>ET_DYN<\/strong><\/td><td>3<\/td><td>\u5171\u4eab\u76ee\u6807\u6587\u4ef6 (.so)<\/td><td>\u52a8\u6001\u94fe\u63a5\u5e93\uff0c\u5728\u8fd0\u884c\u65f6\u4e0e\u5176\u4ed6\u6587\u4ef6\u4e00\u8d77\u88ab\u52a0\u8f7d<\/td><\/tr><tr><td><strong>ET_CORE<\/strong><\/td><td>4<\/td><td>\u6838\u5fc3\u8f6c\u50a8\u6587\u4ef6<\/td><td>\u7a0b\u5e8f\u5d29\u6e83\u65f6\u7684\u5185\u5b58\u955c\u50cf (Core Dump)<\/td><\/tr><tr><td><strong>ET_LOPROC~HIPROC<\/strong><\/td><td>0xff00~0xffff<\/td><td>\u5904\u7406\u5668\u4fdd\u7559\u533a\u95f4<\/td><td>\u9884\u7559\u7ed9\u7279\u5b9a\u5e73\u53f0\u81ea\u5b9a\u4e49\u7c7b\u578b<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\">e_machine<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u6307\u5b9a\u8be5\u6587\u4ef6\u517c\u5bb9\u7684\u786c\u4ef6\u67b6\u6784\u5e73\u53f0\u3002\u901a\u5e38\u4ee5 <code>EM_<\/code> (ELF Machine) \u5f00\u5934\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5e38\u7528\u7684\u5982\uff1aEM_386 (Intel x86, \u503c:3)\u3001EM_MIPS (\u503c:8)\u3001EM_SPARC (\u503c:2) \u7b49\u3002<\/li>\n\n\n\n<li>\u8865\uff1a \u9488\u5bf9\u7279\u5b9a\u5e73\u53f0\u7684\u7279\u6709\u6807\u5fd7\uff0c\u5176\u547d\u540d\u901a\u5e38\u5e26\u6709 <code>EF_&lt;\u67b6\u6784>_<\/code> \u524d\u7f00\uff08\u5982 <code>EF_MIPS_NOREORDER<\/code>\uff09\u3002<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">e_version<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">ELF \u6587\u4ef6\u7684\u683c\u5f0f\u7248\u672c\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>EV_CURRENT (1)\uff1a\u76ee\u524d\u7684\u9ed8\u8ba4\u7248\u672c\u53f7\u3002\uff08\u867d\u7136 ELF \u6709\u6269\u5c55\uff0c\u4f46\u5e95\u5c42\u7248\u672c\u53f7\u5927\u591a\u4fdd\u6301\u4e3a 1\uff09\u3002<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u5165\u53e3\u4e0e\u5168\u5c40\u504f\u79fb\u91cf<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u5b57\u6bb5\u540d<\/th><th>\u5168\u79f0\u63d0\u793a<\/th><th>\u8bf4\u660e<\/th><th>\u6838\u5fc3\u91cd\u70b9<\/th><\/tr><\/thead><tbody><tr><td><strong>e_entry<\/strong><\/td><td>Entry Point<\/td><td><strong>\u6267\u884c\u5165\u53e3\u5730\u5740<\/strong><\/td><td>\u64cd\u4f5c\u7cfb\u7edf\u5c06\u63a7\u5236\u6743\u4ea4\u7ed9\u7a0b\u5e8f\u7684\u521d\u59cb\u865a\u62df\u5730\u5740\u3002\u52a8\u6001\u5e93\u6216\u4e0d\u76f4\u63a5\u6267\u884c\u7684\u6587\u4ef6\u901a\u5e38\u4e3a 0\u3002<\/td><\/tr><tr><td><strong>e_phoff<\/strong><\/td><td>Program Header Offset<\/td><td><strong>\u7a0b\u5e8f\u5934\u90e8\u8868\u504f\u79fb<\/strong><\/td><td>\u7a0b\u5e8f\u5934\u8868\u5728\u6587\u4ef6\u4e2d\u7684\u8d77\u59cb\u4f4d\u7f6e\uff08\u5b57\u8282\u5355\u4f4d\uff09\u3002\u65e0\u5219\u4e3a 0\u3002<\/td><\/tr><tr><td><strong>e_shoff<\/strong><\/td><td>Section Header Offset<\/td><td><strong>\u8282\u533a\u5934\u90e8\u8868\u504f\u79fb<\/strong><\/td><td>\u8282\u533a\u5934\u8868\u5728\u6587\u4ef6\u4e2d\u7684\u8d77\u59cb\u4f4d\u7f6e\uff08\u5b57\u8282\u5355\u4f4d\uff09\u3002\u65e0\u5219\u4e3a 0\u3002<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">\u5927\u5c0f\u4e0e\u6570\u91cf\u63cf\u8ff0 (\u8868\u7ed3\u6784\u4fe1\u606f)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u90e8\u5206\u5b57\u6bb5\u7528\u4e8e\u63cf\u8ff0 ELF \u6587\u4ef6\u4e2d\u5404\u5927\u8868\u683c\u5360\u636e\u7684\u5185\u5b58\u5927\u5c0f\u3002\u9075\u5faa\u516c\u5f0f\uff1a<code>\u603b\u957f\u5ea6 = \u8868\u9879\u5927\u5c0f (entsize) \u00d7 \u8868\u9879\u6570\u91cf (num)<\/code>\u3002<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u5b57\u6bb5\u540d<\/th><th>\u5168\u79f0\u63d0\u793a<\/th><th>\u8bf4\u660e<\/th><\/tr><\/thead><tbody><tr><td><strong>e_ehsize<\/strong><\/td><td>ELF Header Size<\/td><td><strong>ELF\u6587\u4ef6\u5934\u81ea\u8eab\u7684\u5b57\u8282\u5927\u5c0f<\/strong>\u3002<\/td><\/tr><tr><td><strong>e_flags<\/strong><\/td><td>ELF Flags<\/td><td><strong>\u5904\u7406\u5668\u7279\u5b9a\u6807\u5fd7\u4f4d<\/strong>\u3002<\/td><\/tr><tr><td><strong>e_phentsize<\/strong><\/td><td>Program Header Entry Size<\/td><td><strong>\u7a0b\u5e8f\u5934\u90e8\u8868<\/strong>\u4e2d\uff0c<strong>\u5355\u4e2a\u8868\u9879<\/strong>\u7684\u5927\u5c0f\u3002<\/td><\/tr><tr><td><strong>e_phnum<\/strong><\/td><td>Program Header Number<\/td><td><strong>\u7a0b\u5e8f\u5934\u8868\u9879\u7684\u6570\u91cf<\/strong>\u3002\uff08<code>e_phentsize \u00d7 e_phnum<\/code> = \u7a0b\u5e8f\u5934\u8868\u603b\u5927\u5c0f\uff09<\/td><\/tr><tr><td><strong>e_shentsize<\/strong><\/td><td>Section Header Entry Size<\/td><td><strong>\u8282\u533a\u5934\u90e8\u8868<\/strong>\u4e2d\uff0c<strong>\u5355\u4e2a\u8868\u9879<\/strong>\u7684\u5927\u5c0f\u3002<\/td><\/tr><tr><td><strong>e_shnum<\/strong><\/td><td>Section Header Number<\/td><td><strong>\u8282\u5934\u8868\u9879\u7684\u6570\u91cf<\/strong>\u3002\uff08<code>e_shentsize \u00d7 e_shnum<\/code> = \u8282\u533a\u5934\u8868\u603b\u5927\u5c0f\uff09<\/td><\/tr><tr><td><strong>e_shstrndx<\/strong><\/td><td>Section Header String Table Index<\/td><td><strong>\u8282\u533a\u540d\u79f0\u5b57\u7b26\u4e32\u8868\u7684\u7d22\u5f15<\/strong>\u3002\u6307\u5411\u8282\u533a\u5934\u90e8\u8868\u4e2d\u4e13\u95e8\u7528\u4e8e\u5b58\u50a8\u8282\u540d\uff08\u5982 <code>.text<\/code>\u3001<code>.data<\/code>\uff09\u5b57\u7b26\u4e32\u7684\u90a3\u4e00\u4e2a\u8868\u9879\u4f4d\u7f6e\u3002\u5982\u679c\u4e0d\u542b\u8be5\u8868\uff0c\u5219\u503c\u4e3a <code>SHN_UNDEF<\/code>\u3002<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u8865\uff1a<code>e_ph<\/code> \u662f\u4e00\u7ec4\uff08\u8d1f\u8d23\u7a0b\u5e8f\u7684\u5185\u5b58\u52a0\u8f7d\uff09\uff0c<code>e_sh<\/code> \u662f\u4e00\u7ec4\uff08\u8d1f\u8d23\u8282\u533a\u7684\u94fe\u63a5\u5212\u5206\uff09\uff0c\u548c<code>off<\/code>(\u504f\u79fb)\u3001<code>entsize<\/code>(\u5355\u9879\u5927\u5c0f)\u3001<code>num<\/code>(\u6570\u91cf)<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u6587\u4ef6\u7c7b\u578bType<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">elf\u6587\u4ef6\u6587\u4ef6\u4e3b\u8981\u6709\u56db\u79cd\u7c7b\u578b<br>\u53ef\u91cd\u5b9a\u4f4d\u6587\u4ef6ET_REL\uff0c\u53ef\u6267\u884c\u6587\u4ef6ET_EXEC\uff0c\u5171\u4eab\u76ee\u6807\u6587\u4ef6ET_DYN,\u6838\u5fc3\u8f6c\u50a8\u6587\u4ef6ET_CORE\u3002\u4f46\u6211\u4eec\u4f7f\u7528g++\u751f\u6210\u7684\u662f\u4e00\u4e2aDYN\u7c7b\u578b\u7684\u6587\u4ef6\uff0c\u62ec\u53f7\u91cc\u8fdb\u4e00\u6b65\u8bf4\u660e\u8fd9\u662f\u4e00\u4e2aPIE\u7a0b\u5e8f\uff0c\u8fd9\u4e0d\u662f\u4e00\u4e2a\u4f20\u7edf\u7684EXEC\u7c7b\u578b\u7684\u53ef\u6267\u884c\u6587\u4ef6\uff0c\u8fd9\u662f\u7531\u4e8e\u5b89\u5168\u8003\u8651\u7684\u6f14\u8fdb\u7ed3\u679c<br><strong>\u95ee\u9898<\/strong>\uff1a\u4f20\u7edf\u4e0a\uff0c\u53ef\u6267\u884c\u6587\u4ef6\u662fEXEC\u7c7b\u578b\uff0c\u4ed6\u4eec\u6709\u56fa\u5b9a\u7684\u52a0\u8f7d\u5730\u5740\uff0c\u4f46\u968f\u7740\u5b89\u5168\u5a01\u80c1\u5230\u589e\u52a0\uff0c\u5c24\u5176\u662f\u7f13\u51b2\u533a\u6ea2\u51fa\u548c\u8fd4\u56de\u5bfc\u5411\u7f16\u7a0b\uff08ROP\uff09\u653b\u51fb\uff0c\u64cd\u4f5c\u7cfb\u7edf\u5f15\u5165\u4e86aslr\u4f5c\u4e3a\u9632\u5fa1\u673a\u5236\uff0c\u4f46aslr\u6700\u521d\u53ea\u80fd\u968f\u673a\u5316\u5171\u4eab\u5e93\u548c\u5806\u6808\u7684\u4f4d\u7f6e\uff0c\u800c\u4f20\u7edfEXEC\u7c7b\u578b\u7684\u53ef\u6267\u884c\u6587\u4ef6\u4e3b\u4f53\u4f9d\u7136\u52a0\u8f7d\u5728\u56fa\u5b9a\u5730\u5740\uff0c\u6210\u4e3a\u653b\u51fb\u8005\u76ee\u6807\u3002\u4e3a\u4e86\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\uff0cPLE\uff08\u6587\u4ef6\u65e0\u5173\u53ef\u6267\u884c\u6587\u4ef6\uff09\u88ab\u5f00\u53d1\uff0c\u5141\u8bb8\u6574\u4e2a\u7a0b\u5e8f\uff08\u5305\u62ec\u4ee3\u7801\u6bb5\uff09\u88ab\u968f\u673a\u52a0\u8f7d<br><strong>\u539f\u7406<\/strong>\uff1a\u5f53g++\u751f\u6210PIE\u53ef\u6267\u884c\u6587\u4ef6\u65f6\uff0c\u5176\u4f7f\u7528\u76f8\u5bf9\u5bfb\u5740\u800c\u975e\u7edd\u5bf9\u5bfb\u5740\uff0c\u7f16\u8bd1\u6240\u6709\u4ee3\u7801\u4e3a\u4f4d\u7f6e\u65e0\u5173\u4ee3\u7801\uff08PIC\uff09\uff0c\u5e76\u5c06\u53ef\u6267\u884c\u6587\u4ef6\u6807\u8bb0\u4e3aDYN\u7c7b\u578b<br><strong>\u7a0b\u5e8f\u52a0\u8f7d<\/strong>\uff1a\u64cd\u4f5c\u7cfb\u7edf\u52a0\u8f7d\u5668\u770b\u5230DYN\u7c7b\u578b\u7684\u53ef\u6267\u884c\u6587\u4ef6\u65f6\uff0c\u4f1a\u5c06\u5176\u5f53\u4f5c\u5171\u4eab\u5e93\u4e00\u6837\u5904\u7406\uff0c\u968f\u673a\u9009\u62e9\u4e00\u4e2a\u57fa\u5730\u5740\uff0c\u7136\u540e\u76f8\u5e94\u8c03\u6574\u6240\u6709\u5185\u90e8\u5f15\u7528\uff0c\u8fd9\u79cd\u884c\u4e3a\u5f88\u50cf\u52a8\u6001\u5e93\uff0c\u56e0\u6b64\u8fd9\u4e9b\u6587\u4ef6\u88ab\u6807\u8bb0\u4e3aDYN\u7c7b\u578b\uff0c\u5c3d\u7ba1\u5b83\u4eec\u5b9e\u9645\u4e0a\u662f\u53ef\u6267\u884c\u6587\u4ef6<br>\u4f7f\u7528g++ -no-pie\u9009\u9879\u8fdb\u884c\u7f16\u8bd1\u7a0b\u5e8f\u5373\u53ef\u7f16\u8bd1\u4e00\u4e2a\u4f20\u7edf\u7684EXEC\u7c7b\u578b\u53ef\u6267\u884c\u6587\u4ef6<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u517c\u5bb9\u6027\u76f8\u5173\u5b57\u6bb5\u5305\u62ecMachine\u76ee\u6807\u67b6\u6784\uff0cClass\u7c7b\u522b\uff0cData\u6570\u636e\u7f16\u7801\u7b49<\/li>\n\n\n\n<li>\u8be5ELF\u6587\u4ef6\u7ed3\u6784\u76f8\u5173\u5b57\u6bb5\uff0c\u5305\u62ec\u7a0b\u5e8f\u5934\u8868\uff0c\u8282\u5934\u8868\u504f\u79fb\u91cf\uff0c\u957f\u5ea6\u4e0e\u6570\u91cf\u7b49<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u7a0b\u5e8f\u5934\u8868\uff08Program Header Table\uff09<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u5982\u679c\u7a0b\u5e8f\u5934\u90e8\u8868(Program Header Table)\u5b58\u5728\u7684\u8bdd, \u5b83\u4f1a\u544a\u8bc9\u7cfb\u7edf\u5982\u4f55\u521b\u5efa\u8fdb\u7a0b. \u7528\u4e8e\u751f\u6210\u8fdb\u7a0b\u7684\u76ee\u6807\u6587\u4ef6\u5fc5\u987b\u5177\u6709\u7a0b\u5e8f\u5934\u90e8\u8868, \u4f46\u662f\u91cd\u5b9a\u4f4d\u6587\u4ef6\u4e0d\u9700\u8981\u8fd9\u4e2a\u8868.<br>\u63cf\u8ff0\u6bb5\uff08segment\uff09\u4fe1\u606f\uff0c\u7528\u4e8e\u7a0b\u5e8f\u52a0\u8f7d\u548c\u6267\u884c<br>\u7ed3\u6784\u4f53<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>typedef struct {\n    Elf32_Word p_type;    \/\/ \u6bb5\u7c7b\u578b\uff0c\u6216\u8868\u660e\u8be5\u7ed3\u6784\u7684\u76f8\u5173\u4fe1\u606f\n    Elf32_Off  p_offset;  \/\/ \u6bb5\u5728\u6587\u4ef6\u4e2d\u7684\u504f\u79fb\n    Elf32_Addr p_vaddr;   \/\/ \u8be5\u6bb5\u7b2c\u4e00\u4e2a\u5b57\u8282\u5728\u5185\u5b58\u4e2d\u7684\u865a\u62df\u5730\u5740\n    Elf32_Addr p_paddr;   \/\/ \u7269\u7406\u5730\u5740(\u901a\u5e38\u4e0e\u865a\u62df\u5730\u5740\u76f8\u540c)\n    Elf32_Word p_filesz;  \/\/ \u6bb5\u5728\u6587\u4ef6\u955c\u50cf\u4e2d\u6bb5\u7684\u5927\u5c0f\n    Elf32_Word p_memsz;   \/\/ \u6bb5\u5728\u5185\u5b58\u955c\u50cf\u4e2d\u6bb5\u7684\u5927\u5c0f\n    Elf32_Word p_flags;   \/\/ \u6bb5\u6807\u5fd7(\u8bfb\/\u5199\/\u6267\u884c)\n    Elf32_Word p_align;   \/\/ \u6bb5\u5bf9\u9f50\u65b9\u5f0f\n} Elf32_Phdr;\n<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\">\u6bb5\u7c7b\u578b<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u6bb5\u7684\u7c7b\u578bp_type\u5982\u4e0b\u8868\u6240\u793a<br>\u7a0b\u5e8f\u5934\u90e8\u8868\u4e2d\u7684\u6bb5\u7c7b\u578b\u53c8\u53ef\u4ee5\u5206\u4e3a\u57fa\u672c\u6bb5\u548c\u6269\u5c55\u6bb5\u4e24\u5927\u7c7b<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u57fa\u672c\u6bb5\uff1a\u57fa\u672c\u6bb5\u662fELF\u89c4\u8303\u6700\u521d\u5b9a\u4e49\u7684\u6807\u51c6\u6bb5\u7c7b\u578b\uff0c\u5728\u6240\u6709\u7b26\u5408ELF\u6807\u51c6\u7684\u7cfb\u7edf\u4e2d\u90fd\u88ab\u652f\u6301\u548c\u8bc6\u522b\uff0c\u8fd9\u4e9b\u6bb5\u7c7b\u578b\u6784\u6210\u4e86ELF\u53ef\u6267\u884c\u6587\u4ef6\u7684\u57fa\u7840\u7ed3\u6784\uff0c\u5bf9\u4e8e\u7a0b\u5e8f\u7684\u52a0\u8f7d\u548c\u6267\u884c\u662f\u5fc5\u4e0d\u53ef\u5c11\u7684\uff0c\u57fa\u672c\u6bb5\u524b\u884c\u901a\u5e38\u5177\u6709\u8f83\u5c0f\u7684\u7c7b\u578b\u503c\uff080-7\uff09\u5e76\u5728\u539f\u59cbELF\u89c4\u8303\u4e2d\u660e\u786e\u5b9a\u4e49<\/li>\n\n\n\n<li>\u6269\u5c55\u6bb5\uff1a\u6269\u5c55\u6bb5\u662f\u5728ELF\u57fa\u672c\u89c4\u8303\u4e4b\u5916\uff0c\u7531\u7279\u5b9a\u64cd\u4f5c\u7cfb\u7edf\uff0c\u7f16\u8bd1\u5668\uff0c\u6216\u5de5\u5177\u94fe\u5f15\u5165\u7684\u989d\u5916\u6bb5\u7c7b\u578b\uff0c\u8fd9\u4e9b\u6bb5\u7c7b\u578b\u901a\u5e38\u7528\u4e8e\u5b9e\u73b0\u7279\u5b9a\u4e8e\u5e73\u53f0\u7684\u529f\u80fd\uff0c\u5b89\u5168\u7279\u6027\uff0c\u6216\u6027\u80fd\u4f18\u5316<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u6bb5\u7c7b\u578b<\/th><th>\u503c<\/th><th>\u63cf\u8ff0<\/th><th>\u7528\u9014<\/th><\/tr><\/thead><tbody><tr><td><strong>PT_NULL<\/strong><\/td><td>0<\/td><td>\u672a\u4f7f\u7528\u6bb5<\/td><td>\u8868\u793a\u4e00\u4e2a\u672a\u4f7f\u7528\u7684\u7a0b\u5e8f\u5934\u90e8\u8868\u9879\uff0c\u7cfb\u7edf\u4f1a\u5ffd\u7565\u8be5\u6bb5<\/td><\/tr><tr><td><strong>PT_LOAD<\/strong><\/td><td>1<\/td><td>\u53ef\u52a0\u8f7d\u6bb5<\/td><td>\u5b9a\u4e49\u9700\u8981\u4ece\u6587\u4ef6\u6620\u5c04\u5230\u5185\u5b58\u4e2d\u7684\u6bb5\uff0c\u5305\u542b\u4ee3\u7801(.text)\u548c\u6570\u636e(.data)\u7b49<\/td><\/tr><tr><td><strong>PT_DYNAMIC<\/strong><\/td><td>2<\/td><td>\u52a8\u6001\u94fe\u63a5\u4fe1\u606f\u6bb5<\/td><td>\u5305\u542b\u52a8\u6001\u94fe\u63a5\u5668\u6240\u9700\u7684\u4fe1\u606f\uff0c\u5982\u5171\u4eab\u5e93\u4f9d\u8d56\u3001\u7b26\u53f7\u8868\u4f4d\u7f6e\u7b49<\/td><\/tr><tr><td><strong>PT_INTERP<\/strong><\/td><td>3<\/td><td>\u89e3\u91ca\u5668\u6bb5<\/td><td>\u5305\u542b\u7a0b\u5e8f\u89e3\u91ca\u5668\u8def\u5f84\u7684\u5b57\u7b26\u4e32\uff0c\u901a\u5e38\u6307\u5411\u52a8\u6001\u94fe\u63a5\u5668\uff0c\u5982&#8221;\/lib\/ld-linux.so.2&#8243;<\/td><\/tr><tr><td><strong>PT_NOTE<\/strong><\/td><td>4<\/td><td>\u9644\u52a0\u4fe1\u606f\u6bb5<\/td><td>\u5b58\u50a8\u8f85\u52a9\u4fe1\u606f\uff0c\u5982\u7248\u672c\u3001\u4f9b\u5e94\u5546\u4fe1\u606f\u3001ABI \u517c\u5bb9\u6027\u8bf4\u660e\u7b49<\/td><\/tr><tr><td><strong>PT_SHLIB<\/strong><\/td><td>5<\/td><td>\u4fdd\u7559\u6bb5<\/td><td>\u5728\u5f53\u524d ELF \u89c4\u8303\u4e2d\u672a\u5b9a\u4e49\u7528\u9014\uff0c\u4fdd\u7559\u4f9b\u5c06\u6765\u4f7f\u7528<\/td><\/tr><tr><td><strong>PT_PHDR<\/strong><\/td><td>6<\/td><td>\u7a0b\u5e8f\u5934\u90e8\u8868\u6bb5<\/td><td>\u5305\u542b\u7a0b\u5e8f\u5934\u90e8\u8868\u81ea\u8eab\u5728\u5185\u5b58\u4e2d\u7684\u4f4d\u7f6e\u548c\u5927\u5c0f\u4fe1\u606f<\/td><\/tr><tr><td><strong>PT_TLS<\/strong><\/td><td>7<\/td><td>\u7ebf\u7a0b\u5c40\u90e8\u5b58\u50a8\u6bb5<\/td><td>\u5305\u542b\u7ebf\u7a0b\u5c40\u90e8\u53d8\u91cf\u7684\u521d\u59cb\u503c\u548c\u6a21\u677f\uff0c\u7528\u4e8e\u7ebf\u7a0b\u4e13\u6709\u6570\u636e<\/td><\/tr><tr><td><strong>PT_GNU_EH_FRAME<\/strong><\/td><td>0x6474e550<\/td><td>\u5f02\u5e38\u5904\u7406\u6846\u67b6\u6bb5<\/td><td>GNU \u7279\u6709\u6bb5\u7c7b\u578b\uff0c\u5305\u542b\u7528\u4e8e\u6808\u5c55\u5f00\u7684\u5f02\u5e38\u5904\u7406\u4fe1\u606f<\/td><\/tr><tr><td><strong>PT_GNU_STACK<\/strong><\/td><td>0x6474e551<\/td><td>\u6808\u6743\u9650\u6bb5<\/td><td>GNU \u6269\u5c55\uff0c\u7528\u4e8e\u6807\u8bb0\u7a0b\u5e8f\u6808\u662f\u5426\u5177\u6709\u53ef\u6267\u884c\u6743\u9650<\/td><\/tr><tr><td><strong>PT_GNU_RELRO<\/strong><\/td><td>0x6474e552<\/td><td>\u53ea\u8bfb\u91cd\u5b9a\u4f4d\u6bb5<\/td><td>GNU \u6269\u5c55\uff0c\u6807\u8bb0\u5728\u521d\u59cb\u5316\u540e\u5e94\u8bbe\u4e3a\u53ea\u8bfb\u7684\u6bb5\uff0c\u589e\u5f3a\u5b89\u5168\u6027<\/td><\/tr><tr><td><strong>PT_LOPROC<\/strong><\/td><td>0x70000000<\/td><td>\u5904\u7406\u5668\u7279\u5b9a\u6bb5\u4e0b\u9650<\/td><td>\u4e3a\u5904\u7406\u5668\u7279\u5b9a\u8bed\u4e49\u4fdd\u7559\u7684\u6bb5\u7c7b\u578b\u8303\u56f4\u7684\u4e0b\u754c<\/td><\/tr><tr><td><strong>PT_HIPROC<\/strong><\/td><td>0x7fffffff<\/td><td>\u5904\u7406\u5668\u7279\u5b9a\u6bb5\u4e0a\u9650<\/td><td>\u4e3a\u5904\u7406\u5668\u7279\u5b9a\u8bed\u4e49\u4fdd\u7559\u7684\u6bb5\u7c7b\u578b\u8303\u56f4\u7684\u4e0a\u754c<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\">\u6bb5\u5730\u5740<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">ELF\u6587\u4ef6\u4e2d\u7a0b\u5e8f\u6bb5\u7684p_vaddr\u8868\u793a\u8be5\u6bb5\u5728\u865a\u62df\u5185\u5b58\u4e2d\u7684\u9884\u671f\u52a0\u8f7d\u5730\u5740\uff0c\u4f46\u8fd9\u4e2a\u5730\u5740\u901a\u5e38\u4e0d\u662f\u6700\u7ec8\u7684\u5b9e\u9645\u52a0\u8f7d\u5730\u5740\uff0c\u800c\u662f\u9700\u8981\u4e0e\u57fa\u5730\u5740\u7ed3\u5408\u8ba1\u7b97<br>\u5728\u8ba8\u8bba\u4e00\u4e2a\u53ef\u6267\u884c\u7a0b\u5e8f\u5b9e\u9645\u7684\u865a\u62df\u5730\u5740\u4e4b\u524d\uff0c\u9700\u8981\u9996\u5148\u660e\u786e\u662f\u5426\u4f7f\u7528\u4e86PIC\u4f4d\u7f6e\u65e0\u5173\u4ee3\u7801\u6280\u672f\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5bf9\u4e8e\u90a3\u4e9b\u4f7f\u7528\u7edd\u5bf9\u5730\u5740\u7684\u4ee3\u7801\uff0c\u7a0b\u5e8f\u5728\u7f16\u8bd1\u548c\u94fe\u63a5\u65f6\uff0c\u5c31\u5047\u5b9a\u5b83\u5c06\u5728\u7279\u5b9a\u7684\u865a\u62df\u5730\u5740\u7a7a\u95f4\u4e2d\u8fd0\u884c\uff0c\u52a0\u8f7d\u5668\u4e5f\u4f1a\u5c1d\u8bd5\u5c06\u7a0b\u5e8f\u6bb5\u653e\u7f6e\u5728\u5b83\u4eec\u6307\u5b9a\u7684\u865a\u62df\u5730\u5740\u4e0a<\/li>\n\n\n\n<li>\u4f46\u5bf9\u4e8e\u53ef\u80fd\u88ab\u52a0\u8f7d\u5230\u4efb\u610f\u4f4d\u7f6e\u7684\u5171\u4eab\u5e93\u6216\u8005\u65f6PIC\/PLE\u7a0b\u5e8f\u800c\u8a00\uff0c\u5176\u5b8c\u5168\u907f\u514d\u4e86\u7edd\u5bf9\u5730\u5740\u5f15\u7528\uff0c\u800c\u662f\u901a\u8fc7\u76f8\u5bf9\u5bfb\u5740\u7684\u65b9\u5f0f\u6765\u8bbf\u95ee\u81ea\u5df1\u7684\u4ee3\u7801\u548c\u6570\u636e\uff0c\u4f7f\u7528\u4e86\u5168\u5c40\u504f\u79fb\u8868\uff08GOT\uff09\u548c\u8fc7\u7a0b\u94fe\u63a5\u8868\uff08PLT\uff09\u5904\u7406\u52a8\u6001\u7b26\u53f7\u3002\u6bb5\u548c\u6bb5\u4e4b\u95f4\u7ef4\u6301\u7740\u76f8\u5bf9\u4f4d\u7f6e\u5173\u7cfb\u5373\u53ef<br>\u7a0b\u5e8f\u6bb5\u5728\u5185\u5b58\u4e2d\u5b9e\u9645\u5730\u5740\u7684\u8ba1\u7b97\u516c\u5f0f<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>\u5b9e\u9645\u52a0\u8f7d\u5730\u5740 = \u57fa\u5730\u5740 + (p_vaddr - \u6700\u5c0f\u53ef\u52a0\u8f7d\u6bb5\u7684p_vaddr)\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u57fa\u5730\u5740\u7531\u52a8\u6001\u52a0\u8f7d\u5668\uff08\u5982ld.so)\u5728\u52a0\u8f7d\u65f6\u51b3\u5b9a\uff0c\u8fd8\u4f1a\u53d7\u5230ASLR\uff0c\u9875\u5bf9\u9f50\u7b49\u673a\u5236\u7684\u5f71\u54cd<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u6bb5\u6807\u5fd7\u4f4d<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u5f53\u7cfb\u7edf\u4e3a\u53ef\u52a0\u8f7d\u7684\u6bb5\u521b\u5efa<br>\u5185\u5b58\u955c\u50cf\u65f6\uff0c\u5b83\u4f1a\u6309\u7167p_flags\u5c06\u6bb5\u8bbe\u7f6e\u4e3a\u5bf9\u5e94\u7684\u6743\u9650<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u503c<\/th><th>\u540d\u79f0<\/th><th>\u542b\u4e49<\/th><\/tr><\/thead><tbody><tr><td>0x1<\/td><td><strong>PF_X<\/strong><\/td><td>\u53ef\u6267\u884c\u6bb5\uff08Executable segment\uff09<\/td><\/tr><tr><td>0x2<\/td><td><strong>PF_W<\/strong><\/td><td>\u53ef\u5199\u6bb5\uff08Writeable segment\uff09<\/td><\/tr><tr><td>0x4<\/td><td><strong>PF_R<\/strong><\/td><td>\u53ef\u8bfb\u6bb5\uff08Readable segment\uff09<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">\u8282\u5934\u8868\uff08Section Header Table\uff09<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u63cf\u8ff0\u8282\u7684\u4fe1\u606f\uff08section\uff09\uff0c\u4e3b\u8981\u7528\u4e8e\u94fe\u63a5\u548c\u8c03\u8bd5<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>typedef struct {\n    Elf32_Word sh_name;      \/\/ \u8282\u540d\u79f0(\u5b57\u7b26\u4e32\u8868\u7d22\u5f15)\n    Elf32_Word sh_type;      \/\/ \u8282\u7c7b\u578b\n    Elf32_Word sh_flags;     \/\/ \u8282\u6807\u5fd7\n    Elf32_Addr sh_addr;      \/\/ \u8282\u5728\u5185\u5b58\u4e2d\u7684\u5730\u5740\n    Elf32_Off  sh_offset;    \/\/ \u8282\u5728\u6587\u4ef6\u4e2d\u7684\u504f\u79fb\n    Elf32_Word sh_size;      \/\/ \u8282\u5927\u5c0f\n    Elf32_Word sh_link;      \/\/ \u94fe\u63a5\u5230\u5176\u4ed6\u8282\u7684\u7d22\u5f15\n    Elf32_Word sh_info;      \/\/ \u9644\u52a0\u4fe1\u606f\n    Elf32_Word sh_addralign; \/\/ \u8282\u5bf9\u9f50\u65b9\u5f0f\n    Elf32_Word sh_entsize;   \/\/ \u6761\u76ee\u5927\u5c0f(\u5982\u679c\u6709)\n} Elf32_Shdr;\n<\/code><\/pre>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u6210\u5458<\/th><th>\u8bf4\u660e<\/th><\/tr><\/thead><tbody><tr><td><strong>sh_name<\/strong><\/td><td>\u8282\u540d\u79f0\uff0c\u672c\u8d28\u662f\u4e00\u4e2a\u6570\u503c\uff0c\u4f5c\u4e3a\u8282\u533a\u5934\u5b57\u7b26\u4e32\u8868\u8282\u533a (Section Header String Table Section) \u7684\u7d22\u5f15\uff0c\u5728\u8be5\u8868\u4e2d\u662f\u4e00\u4e2a\u4ee5 NULL \u7ed3\u5c3e\u7684\u5b57\u7b26\u4e32<\/td><\/tr><tr><td><strong>sh_type<\/strong><\/td><td>\u8282\u533a\u7c7b\u578b<\/td><\/tr><tr><td><strong>sh_flags<\/strong><\/td><td>\u6bcf\u4e00 bit \u4ee3\u8868\u4e0d\u540c\u7684\u6807\u5fd7\uff0c\u63cf\u8ff0\u8282\u662f\u5426\u53ef\u5199\u3001\u53ef\u6267\u884c\u3001\u9700\u8981\u5206\u914d\u5185\u5b58\u7b49\u5c5e\u6027<\/td><\/tr><tr><td><strong>sh_addr<\/strong><\/td><td>\u5982\u679c\u8282\u533a\u5c06\u51fa\u73b0\u5728\u8fdb\u7a0b\u7684\u5185\u5b58\u6620\u50cf\u4e2d\uff0c\u6b64\u6210\u5458\u7ed9\u51fa\u8282\u533a\u7684\u7b2c\u4e00\u4e2a\u5b57\u8282\u5e94\u8be5\u5728\u8fdb\u7a0b\u955c\u50cf\u4e2d\u7684\u4f4d\u7f6e\u3002\u5426\u5219\uff0c\u6b64\u5b57\u6bb5\u4e3a 0<\/td><\/tr><tr><td><strong>sh_offset<\/strong><\/td><td>\u7ed9\u51fa\u8282\u533a\u7684\u7b2c\u4e00\u4e2a\u5b57\u8282\u4e0e\u6587\u4ef6\u5f00\u59cb\u5904\u4e4b\u95f4\u7684\u504f\u79fb\u3002SHT_NOBITS \u7c7b\u578b\u7684\u8282\u533a\u4e0d\u5360\u7528\u6587\u4ef6\u7684\u7a7a\u95f4\uff0c\u56e0\u6b64\u5176 sh_offset \u6210\u5458\u7ed9\u51fa\u7684\u662f\u6982\u5ff5\u6027\u7684\u504f\u79fb<\/td><\/tr><tr><td><strong>sh_size<\/strong><\/td><td>\u6b64\u6210\u5458\u7ed9\u51fa\u8282\u533a\u7684\u5b57\u8282\u5927\u5c0f\u3002\u9664\u975e\u8282\u533a\u7684\u7c7b\u578b\u662f SHT_NOBITS\uff0c\u5426\u5219\u8be5\u8282\u5360\u7528\u6587\u4ef6\u4e2d\u7684 sh_size \u5b57\u8282\u3002\u7c7b\u578b\u4e3a SHT_NOBITS \u7684\u8282\u533a\u957f\u5ea6\u53ef\u80fd\u975e\u96f6\uff0c\u4e0d\u8fc7\u5374\u4e0d\u5360\u7528\u6587\u4ef6\u4e2d\u7684\u7a7a\u95f4<\/td><\/tr><tr><td><strong>sh_link<\/strong><\/td><td>\u6b64\u6210\u5458\u7ed9\u51fa\u8282\u533a\u5934\u90e8\u8868\u7d22\u5f15\u94fe\u63a5\uff0c\u5176\u5177\u4f53\u7684\u89e3\u91ca\u4f9d\u8d56\u4e8e\u8282\u533a\u7c7b\u578b<\/td><\/tr><tr><td><strong>sh_info<\/strong><\/td><td>\u6b64\u6210\u5458\u7ed9\u51fa\u9644\u52a0\u4fe1\u606f\uff0c\u5176\u89e3\u91ca\u4f9d\u8d56\u4e8e\u8282\u533a\u7c7b\u578b<\/td><\/tr><tr><td><strong>sh_addralign<\/strong><\/td><td>\u67d0\u4e9b\u8282\u533a\u7684\u5730\u5740\u9700\u8981\u5bf9\u9f50\u3002\u76ee\u524d\u5b83\u4ec5\u5141\u8bb8\u4e3a 0 \u4ee5\u53ca 2 \u7684\u6b63\u6574\u6570\u5e42\u6570\uff0c0 \u548c 1 \u8868\u793a\u6ca1\u6709\u5bf9\u9f50\u7ea6\u675f<\/td><\/tr><tr><td><strong>sh_entsize<\/strong><\/td><td>\u67d0\u4e9b\u8282\u533a\u4e2d\u5b58\u5728\u5177\u6709\u56fa\u5b9a\u5927\u5c0f\u7684\u8868\u9879\u7684\u8868\uff0c\u5982\u7b26\u53f7\u8868\u3002\u5bf9\u4e8e\u8fd9\u7c7b\u8282\u533a\uff0c\u8be5\u6210\u5458\u7ed9\u51fa\u6bcf\u4e2a\u8868\u9879\u7684\u5b57\u8282\u5927\u5c0f\u3002\u53cd\u4e4b\uff0c\u6b64\u6210\u5458\u53d6\u503c\u4e3a 0<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u8282\u533a\u5934\u90e8\u8868\u4e2d\u5b58\u5728\u4e00\u4e9b\u7279\u6b8a\u7684\u8282\u533a\uff0c\u5982\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>SHN_UNDEF(0),\u8868\u793a\u672a\u5b9a\u4e49\u7684\u8282\u533a<\/li>\n\n\n\n<li>SHN_LORESERVE(0xFF00)\uff0c\u8868\u793a\u4fdd\u7559\u533a\u7684\u4e0b\u754c\uff0cSHN_HIRESERVE(0xFFFF)\uff0c\u8868\u793a\u4fdd\u7559\u533a\u7684\u4e0a\u754c<br>\u7cfb\u7edf\u4fdd\u7559\u5728SHN_LORESERVE\u5230SHN_HIRESERVE\u4e4b\u95f4\uff08\u5305\u542b\u8fb9\u754c\uff09\u7684\u7d22\u5f15\u503c\uff0c\u8fd9\u4e9b\u503c\u4e0d\u5728\u8282\u5934\u8868\u4e2d\u5f15\u7528\uff0c\u8282\u5934\u8868\u4e0d\u5305\u542b\u4fdd\u7559\u7d22\u5f15\u9879<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">\u8282\u533a\u7c7b\u578b<\/h4>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u540d\u79f0<\/th><th>\u53d6\u503c<\/th><th>\u8bf4\u660e<\/th><\/tr><\/thead><tbody><tr><td>SHT_NULL<\/td><td>0<\/td><td>\u8be5\u7c7b\u578b\u8282\u533a\u662f\u975e\u6d3b\u52a8\u7684, \u8fd9\u79cd\u7c7b\u578b\u7684\u8282\u5934\u4e2d\u7684\u5176\u5b83\u6210\u5458\u53d6\u503c\u65e0\u610f\u4e49.<\/td><\/tr><tr><td>SHT_PROGBITS<\/td><td>1<\/td><td>\u8be5\u7c7b\u578b\u8282\u533a\u5305\u542b\u7a0b\u5e8f\u5b9a\u4e49\u7684\u4fe1\u606f, \u5b83\u7684\u683c\u5f0f\u548c\u542b\u4e49\u90fd\u7531\u7a0b\u5e8f\u6765\u51b3\u5b9a.<\/td><\/tr><tr><td>SHT_SYMTAB<\/td><td>2<\/td><td>\u8be5\u7c7b\u578b\u8282\u533a\u5305\u542b\u4e00\u4e2a\u7b26\u53f7\u8868(SYMbol TABle). \u76ee\u524d\u76ee\u6807\u6587\u4ef6\u5bf9\u6bcf\u79cd\u7c7b\u578b\u7684\u8282\u533a\u90fd\u53ea\u80fd\u5305\u542b\u4e00\u4e2a, \u4e0d\u8fc7\u8fd9\u4e2a\u9650\u5236\u5c06\u6765\u53ef\u80fd\u53d1\u751f\u53d8\u5316. \u4e00\u822c, SHT_SYMTAB \u8282\u533a\u63d0\u4f9b\u7528\u4e8e\u94fe\u63a5\u7f16\u8f91(\u6307 ld \u800c\u8a00)\u7684\u7b26\u53f7, \u5c3d\u7ba1\u4e5f\u53ef\u7528\u6765\u5b9e\u73b0\u52a8\u6001\u94fe\u63a5.<\/td><\/tr><tr><td>SHT_STRTAB<\/td><td>3<\/td><td>\u8be5\u7c7b\u578b\u8282\u533a\u5305\u542b\u5b57\u7b26\u4e32\u8868(STRing TABle).<\/td><\/tr><tr><td>SHT_RELA<\/td><td>4<\/td><td>\u8be5\u7c7b\u578b\u8282\u533a\u5305\u542b\u663e\u5f0f\u6307\u5b9a\u4f4d\u6570\u7684\u91cd\u5b9a\u4f4d\u9879(RELocation entry with Addends), \u4f8b\u5982, 32 \u4f4d\u76ee\u6807\u6587\u4ef6\u4e2d\u7684 Elf32_Rela \u7c7b\u578b. \u6b64\u5916, \u76ee\u6807\u6587\u4ef6\u53ef\u80fd\u62e5\u6709\u591a\u4e2a\u91cd\u5b9a\u4f4d\u8282\u533a.<\/td><\/tr><tr><td>SHT_HASH<\/td><td>5<\/td><td>\u8be5\u7c7b\u578b\u8282\u533a\u5305\u542b\u7b26\u53f7\u54c8\u5e0c\u8868(HASH table).<\/td><\/tr><tr><td>SHT_DYNAMIC<\/td><td>6<\/td><td>\u8be5\u7c7b\u578b\u8282\u533a\u5305\u542b\u52a8\u6001\u94fe\u63a5\u7684\u4fe1\u606f(DYNAMIC linking).<\/td><\/tr><tr><td>SHT_NOTE<\/td><td>7<\/td><td>\u8be5\u7c7b\u578b\u8282\u533a\u5305\u542b\u4ee5\u67d0\u79cd\u65b9\u5f0f\u6807\u8bb0\u6587\u4ef6\u7684\u4fe1\u606f(NOTE).<\/td><\/tr><tr><td>SHT_NOBITS<\/td><td>8<\/td><td>\u8be5\u7c7b\u578b\u8282\u533a\u4e0d\u5360\u7528\u6587\u4ef6\u7684\u7a7a\u95f4, \u5176\u5b83\u65b9\u9762\u548cSHT_PROGBITS\u76f8\u4f3c. \u5c3d\u7ba1\u8be5\u7c7b\u578b\u8282\u533a\u4e0d\u5305\u542b\u4efb\u4f55\u5b57\u8282, \u5176\u5bf9\u5e94\u7684\u8282\u5934\u6210\u5458sh_offset \u4e2d\u8fd8\u662f\u4f1a\u5305\u542b\u6982\u5ff5\u6027\u7684\u6587\u4ef6\u504f\u79fb.<\/td><\/tr><tr><td>SHT_REL<\/td><td>9<\/td><td>\u8be5\u7c7b\u578b\u8282\u533a\u5305\u542b\u91cd\u5b9a\u4f4d\u8868\u9879(RELocation entry without Addends), \u4e0d\u8fc7\u5e76\u6ca1\u6709\u6307\u5b9a\u4f4d\u6570. \u4f8b\u5982, 32\u4f4d\u76ee\u6807\u6587\u4ef6\u4e2d\u7684 Elf32_rel \u7c7b\u578b. \u76ee\u6807\u6587\u4ef6\u4e2d\u53ef\u4ee5\u62e5\u6709\u591a\u4e2a\u91cd\u5b9a\u4f4d\u8282\u533a.<\/td><\/tr><tr><td>SHT_SHLIB<\/td><td>10<\/td><td>\u8be5\u7c7b\u578b\u6b64\u8282\u533a\u88ab\u4fdd\u7559, \u4e0d\u8fc7\u5176\u8bed\u4e49\u5c1a\u672a\u88ab\u5b9a\u4e49.<\/td><\/tr><tr><td>SHT_DYNSYM<\/td><td>11<\/td><td>\u4f5c\u4e3a\u4e00\u4e2a\u5b8c\u6574\u7684\u7b26\u53f7\u8868, \u5b83\u53ef\u80fd\u5305\u542b\u5f88\u591a\u5bf9\u52a8\u6001\u94fe\u63a5\u800c\u8a00\u4e0d\u5fc5\u8981\u7684\u7b26\u53f7. \u56e0\u6b64, \u76ee\u6807\u6587\u4ef6\u4e5f\u53ef\u4ee5\u5305\u542b\u4e00\u4e2a SHT_DYNSYM \u8282\u533a, \u5176\u4e2d\u4fdd\u5b58\u52a8\u6001\u94fe\u63a5\u7b26\u53f7\u7684\u4e00\u4e2a\u6700\u5c0f\u96c6\u5408, \u4ee5\u8282\u7701\u7a7a\u95f4.<\/td><\/tr><tr><td>SHT_LOPROC<\/td><td>0X70000000<\/td><td>\u6b64\u503c\u6307\u5b9a\u4fdd\u7559\u7ed9\u5904\u7406\u5668\u4e13\u7528\u8bed\u4e49\u7684\u4e0b\u754c(LOw PROCessor-specific semantics).<\/td><\/tr><tr><td>SHT_HIPROC<\/td><td>0X7FFFFFFF<\/td><td>\u6b64\u503c\u6307\u5b9a\u4fdd\u7559\u7ed9\u5904\u7406\u5668\u4e13\u7528\u8bed\u4e49\u7684\u4e0a\u754c(HIgh PROCessor-specific semantics).<\/td><\/tr><tr><td>SHT_LOUSER<\/td><td>0X80000000<\/td><td>\u6b64\u503c\u6307\u5b9a\u4fdd\u7559\u7ed9\u5e94\u7528\u7a0b\u5e8f\u7684\u7d22\u5f15\u4e0b\u754c.<\/td><\/tr><tr><td>SHT_HIUSER<\/td><td>0X8FFFFFFF<\/td><td>\u6b64\u503c\u6307\u5b9a\u4fdd\u7559\u7ed9\u5e94\u7528\u7a0b\u5e8f\u7684\u7d22\u5f15\u4e0a\u754c.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\">\u8282\u533a\u6807\u5fd7\u4f4d<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u8282\u5934\u4e2dsh_flags\u5b57\u6bb5\u7684\u6bcf\u4e00\u4e2a\u6bd4\u7279\u4f4d\u90fd\u53ef\u4ee5\u7ed9\u51fa\u5176\u76f8\u5e94\u7684\u6807\u8bb0\u4fe1\u606f, \u5176\u5b9a\u4e49\u4e86\u5bf9\u5e94\u7684\u8282\u533a\u7684\u5185\u5bb9\u662f\u5426\u53ef\u4ee5\u88ab\u4fee\u6539\u3001\u88ab\u6267\u884c\u7b49\u4fe1\u606f.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u540d\u79f0<\/th><th>\u503c<\/th><th>\u8bf4\u660e<\/th><\/tr><\/thead><tbody><tr><td>SHF_WRITE<\/td><td>0x1<\/td><td>\u8fd9\u79cd\u8282\u5305\u542b\u4e86\u8fdb\u7a0b\u8fd0\u884c\u8fc7\u7a0b\u4e2d\u53ef\u4ee5\u88ab\u5199\u7684\u6570\u636e.<\/td><\/tr><tr><td>SHF_ALLOC<\/td><td>0x2<\/td><td>\u8fd9\u79cd\u8282\u5728\u8fdb\u7a0b\u8fd0\u884c\u65f6\u5360\u7528\u5185\u5b58. \u5bf9\u4e8e\u4e0d\u5360\u7528\u76ee\u6807\u6587\u4ef6\u7684\u5185\u5b58\u955c\u50cf\u7a7a\u95f4\u7684\u67d0\u4e9b\u63a7\u5236\u8282, \u8be5\u5c5e\u6027\u5904\u4e8e\u5173\u95ed\u72b6\u6001(off).<\/td><\/tr><tr><td>SHF_EXECINSTR<\/td><td>0x4<\/td><td>\u8fd9\u79cd\u8282\u5305\u542b\u53ef\u6267\u884c\u7684\u673a\u5668\u6307\u4ee4(<strong>EXECutable INSTRuction<\/strong>).<\/td><\/tr><tr><td>SHF_MASKPROC<\/td><td>0xf0000000<\/td><td>\u6240\u6709\u5728\u8fd9\u4e2a\u63a9\u7801\u4e2d\u7684\u6bd4\u7279\u4f4d\u7528\u4e8e\u7279\u5b9a\u5904\u7406\u5668\u8bed\u4e49.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\">link\u4e0einfo\u5b57\u6bb5<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u5f53\u8282\u533a\u7c7b\u578b\u7684\u4e0d\u540c\u7684\u65f6\u5019\uff0csh_link\u548csh_info\u4e5f\u4f1a\u5177\u6709\u4e0d\u540c\u7684\u542b\u4e49<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>sh_type<\/th><th>sh_link<\/th><th>sh_info<\/th><\/tr><\/thead><tbody><tr><td>SHT_DYNAMIC<\/td><td>\u8282\u533a\u4e2d\u4f7f\u7528\u7684\u5b57\u7b26\u4e32\u8868\u7684\u8282\u5934\u7d22\u5f15<\/td><td>0<\/td><\/tr><tr><td>SHT_HASH<\/td><td>\u6b64\u54c8\u5e0c\u8868\u6240\u4f7f\u7528\u7684\u7b26\u53f7\u8868\u7684\u8282\u5934\u7d22\u5f15<\/td><td>0<\/td><\/tr><tr><td>SHT_REL\/SHT_RELA<\/td><td>\u4e0e\u7b26\u53f7\u8868\u76f8\u5173\u7684\u7684\u8282\u5934\u7d22\u5f15<\/td><td>\u91cd\u5b9a\u4f4d\u5e94\u7528\u5230\u7684\u8282\u7684\u8282\u5934\u7d22\u5f15<\/td><\/tr><tr><td>SHT_SYMTAB\/SHT_DYNSYM<\/td><td>\u64cd\u4f5c\u7cfb\u7edf\u7279\u5b9a\u4fe1\u606f, Linux \u4e2d\u7684 ELF \u6587\u4ef6\u4e2d\u8be5\u9879\u6307\u5411\u7b26\u53f7\u8868\u4e2d\u7b26\u53f7\u6240\u5bf9\u5e94\u7684\u5b57\u7b26\u4e32\u8282\u533a\u5728 Section Header Table \u4e2d\u7684\u504f\u79fb.<\/td><td>\u64cd\u4f5c\u7cfb\u7edf\u7279\u5b9a\u4fe1\u606f<\/td><\/tr><tr><td>other<\/td><td>SHN_UNDEF<\/td><td>0<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">\u8282\u533a<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u8282\u5b58\u50a8\u5b9e\u9645\u5185\u5bb9\uff0c\u5e38\u89c1\u8282\u6709\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>.text\uff1a\u53ef\u6267\u884c\u4ee3\u7801<\/li>\n\n\n\n<li>.data\uff1a\u5df2\u521d\u59cb\u5316\u7684\u5168\u5c40\u53d8\u91cf<\/li>\n\n\n\n<li>.bss\uff1a\u672a\u521d\u59cb\u5316\u7684\u5168\u5c40\u53d8\u91cf(\u4e0d\u5360\u7528\u6587\u4ef6\u7a7a\u95f4)<\/li>\n\n\n\n<li>.rodata\uff1a\u53ea\u8bfb\u6570\u636e<\/li>\n\n\n\n<li>.symtab\uff1a\u7b26\u53f7\u8868<\/li>\n\n\n\n<li>.strtab\uff1a\u5b57\u7b26\u4e32\u8868<\/li>\n\n\n\n<li>.rel.*\uff1a\u91cd\u5b9a\u4f4d\u4fe1\u606f<\/li>\n\n\n\n<li>.dynamic\uff1a\u52a8\u6001\u94fe\u63a5\u4fe1\u606f<\/li>\n\n\n\n<li>.interp\uff1a\u7a0b\u5e8f\u89e3\u91ca\u5668\u8def\u5f84(\u5982\/lib\/ld-linux.so.2\uff09<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u540d\u79f0<\/th><th>\u7c7b\u578b<\/th><th>\u5c5e\u6027<\/th><th>\u542b\u4e49<\/th><\/tr><\/thead><tbody><tr><td>.bss<\/td><td>SHT_NOBITS<\/td><td>SHF_ALLOC + SHF_WRITE<\/td><td>\u5305\u542b\u5c06\u51fa\u73b0\u5728\u7a0b\u5e8f\u7684\u5185\u5b58\u6620\u50cf\u4e2d\u7684\u4e3a\u521d\u59cb\u5316\u6570\u636e\u3002\u6839\u636e\u5b9a\u4e49\uff0c\u5f53\u7a0b\u5e8f\u5f00\u59cb\u6267\u884c\uff0c\u7cfb\u7edf\u5c06\u628a\u8fd9\u4e9b\u6570\u636e\u521d\u59cb\u5316\u4e3a 0\u3002\u6b64\u8282\u533a\u4e0d\u5360\u7528\u6587\u4ef6\u7a7a\u95f4\u3002<\/td><\/tr><tr><td>.comment<\/td><td>SHT_PROGBITS<\/td><td>(\u65e0)<\/td><td>\u5305\u542b\u7248\u672c\u63a7\u5236\u4fe1\u606f\u3002<\/td><\/tr><tr><td>.data<\/td><td>SHT_PROGBITS<\/td><td>SHF_ALLOC + SHF_WRITE<\/td><td>\u8fd9\u4e9b\u8282\u533a\u5305\u542b\u521d\u59cb\u5316\u4e86\u7684\u6570\u636e\uff0c\u5c06\u51fa\u73b0\u5728\u7a0b\u5e8f\u7684\u5185\u5b58\u6620\u50cf\u4e2d\u3002<\/td><\/tr><tr><td>.data1<\/td><td>SHT_PROGBITS<\/td><td>SHF_ALLOC + SHF_WRITE<\/td><td>\u8fd9\u4e9b\u8282\u533a\u5305\u542b\u521d\u59cb\u5316\u4e86\u7684\u6570\u636e\uff0c\u5c06\u51fa\u73b0\u5728\u7a0b\u5e8f\u7684\u5185\u5b58\u6620\u50cf\u4e2d\u3002<\/td><\/tr><tr><td>.debug<\/td><td>SHT_PROGBITS<\/td><td>(\u65e0)<\/td><td>\u6b64\u8282\u533a\u5305\u542b\u7528\u4e8e\u7b26\u53f7\u8c03\u8bd5\u7684\u4fe1\u606f\u3002<\/td><\/tr><tr><td>.dynamic<\/td><td>SHT_DYNAMIC<\/td><td>SHF_ALLOC \u4f4d\uff0c\u662f\u5426 SHF_WRITE \u4f4d\u88ab\u8bbe\u7f6e\u53d6\u51b3\u4e8e\u5904\u7406\u5668\u3002<\/td><td>\u6b64\u8282\u533a\u5305\u542b\u52a8\u6001\u94fe\u63a5\u4fe1\u606f\u3002\u8282\u533a\u7684\u5c5e\u6027\u5c06\u5305\u542b SHF_ALLOC \u4f4d\u3002<\/td><\/tr><tr><td>.dynstr<\/td><td>SHT_STRTAB<\/td><td>SHF_ALLOC<\/td><td>\u6b64\u8282\u533a\u5305\u542b\u7528\u4e8e\u52a8\u6001\u94fe\u63a5\u7684\u5b57\u7b26\u4e32\uff0c\u5927\u591a\u6570\u60c5\u51b5\u4e0b\u8fd9\u4e9b\u5b57\u7b26\u4e32\u4ee3\u8868\u4e86\u4e0e\u7b26\u53f7\u8868\u9879\u76f8\u5173\u7684\u540d\u79f0\u3002<\/td><\/tr><tr><td>.dynsym<\/td><td>SHT_DYNSYM<\/td><td>SHF_ALLOC<\/td><td>\u6b64\u8282\u533a\u5305\u542b\u4e86\u52a8\u6001\u94fe\u63a5\u7b26\u53f7\u8868\u3002<\/td><\/tr><tr><td>.fini<\/td><td>SHT_PROGBITS<\/td><td>SHF_ALLOC + SHF_EXECINSTR<\/td><td>\u6b64\u8282\u533a\u5305\u542b\u4e86\u53ef\u6267\u884c\u7684\u6307\u4ee4\uff0c\u662f\u8fdb\u7a0b\u7ec8\u6b62\u4ee3\u7801\u7684\u4e00\u90e8\u5206\u3002\u7a0b\u5e8f\u6b63\u5e38\u9000\u51fa\u65f6\uff0c\u7cfb\u7edf\u5c06\u5b89\u6392\u6267\u884c\u8fd9\u91cc\u7684\u4ee3\u7801\u3002<\/td><\/tr><tr><td>.got<\/td><td>SHT_PROGBITS<\/td><td><\/td><td>\u6b64\u8282\u533a\u5305\u542b\u5168\u5c40\u504f\u79fb\u8868\u3002<\/td><\/tr><tr><td>.hash<\/td><td>SHT_HASH<\/td><td>SHF_ALLOC<\/td><td>\u6b64\u8282\u533a\u5305\u542b\u4e86\u4e00\u4e2a\u7b26\u53f7\u54c8\u5e0c\u8868\u3002<\/td><\/tr><tr><td>.init<\/td><td>SHT_PROGBITS<\/td><td>SHF_ALLOC + SHF_EXECINSTR<\/td><td>\u6b64\u8282\u533a\u5305\u542b\u4e86\u53ef\u6267\u884c\u6307\u4ee4\uff0c\u662f\u8fdb\u7a0b\u521d\u59cb\u5316\u4ee3\u7801\u7684\u4e00\u90e8\u5206\u3002\u5f53\u7a0b\u5e8f\u5f00\u59cb\u6267\u884c\u65f6\uff0c\u7cfb\u7edf\u8981\u5728\u5f00\u59cb\u8c03\u7528\u4e3b\u5165\u53e3\u4e4b\u524d\uff08\u901a\u5e38\u6307 C \u8bed\u8a00\u7684 main \u51fd\u6570\uff09\u6267\u884c\u8fd9\u4e9b\u4ee3\u7801\u3002<\/td><\/tr><tr><td>.interp<\/td><td>SHT_PROGBITS<\/td><td><\/td><td>\u6b64\u8282\u533a\u5305\u542b\u7a0b\u5e8f\u89e3\u91ca\u5668\u7684\u8def\u5f84\u540d\u3002\u5982\u679c\u7a0b\u5e8f\u5305\u542b\u4e00\u4e2a\u53ef\u52a0\u8f7d\u7684\u6bb5\uff0c\u6bb5\u4e2d\u5305\u542b\u6b64\u8282\u533a\uff0c\u90a3\u4e48\u8282\u533a\u7684\u5c5e\u6027\u5c06\u5305\u542b SHF_ALLOC \u4f4d\uff0c\u5426\u5219\u8be5\u4f4d\u4e3a 0\u3002<\/td><\/tr><tr><td>.line<\/td><td>SHT_PROGBITS<\/td><td>(\u65e0)<\/td><td>\u6b64\u8282\u533a\u5305\u542b\u7b26\u53f7\u8c03\u8bd5\u7684\u884c\u53f7\u4fe1\u606f\uff0c\u5176\u4e2d\u63cf\u8ff0\u4e86\u6e90\u7a0b\u5e8f\u4e0e\u673a\u5668\u6307\u4ee4\u4e4b\u95f4\u7684\u5bf9\u5e94\u5173\u7cfb\u3002\u5176\u5185\u5bb9\u662f\u672a\u5b9a\u4e49\u7684\u3002<\/td><\/tr><tr><td>.note<\/td><td>SHT_NOTE<\/td><td>(\u65e0)<\/td><td>\u6b64\u8282\u533a\u4e2d\u5305\u542b\u6ce8\u91ca\u4fe1\u606f\uff0c\u6709\u72ec\u7acb\u7684\u683c\u5f0f\u3002<\/td><\/tr><tr><td>.plt<\/td><td>SHT_PROGBITS<\/td><td><\/td><td>\u6b64\u8282\u533a\u5305\u542b\u8fc7\u7a0b\u94fe\u63a5\u8868\uff08procedure linkage table\uff09\u3002<\/td><\/tr><tr><td>.rel[name]<\/td><td>SHT_REL<\/td><td><\/td><td>\u8fd9\u4e9b\u8282\u533a\u4e2d\u5305\u542b\u4e86\u91cd\u5b9a\u4f4d\u4fe1\u606f\u3002\u5982\u679c\u6587\u4ef6\u4e2d\u5305\u542b\u53ef\u52a0\u8f7d\u7684\u6bb5\uff0c\u6bb5\u4e2d\u6709\u91cd\u5b9a\u4f4d\u5185\u5bb9\uff0c\u8282\u533a\u7684\u5c5e\u6027\u5c06\u5305\u542b SHF_ALLOC \u4f4d\uff0c\u5426\u5219\u8be5\u4f4d\u7f6e 0\u3002\u4f20\u7edf\u4e0a name \u6839\u636e\u91cd\u5b9a\u4f4d\u6240\u9002\u7528\u7684\u8282\u533a\u7ed9\u5b9a\u3002\u4f8b\u5982 .text \u8282\u533a\u7684\u91cd\u5b9a\u4f4d\u8282\u533a\u540d\u5b57\u5c06\u662f\uff1a.rel.text \u6216\u8005 .rela.text\u3002<\/td><\/tr><tr><td>.rela[name]<\/td><td>SHT_RELA<\/td><td><\/td><td>\u8fd9\u4e9b\u8282\u533a\u4e2d\u5305\u542b\u4e86\u91cd\u5b9a\u4f4d\u4fe1\u606f\u3002\u5982\u679c\u6587\u4ef6\u4e2d\u5305\u542b\u53ef\u52a0\u8f7d\u7684\u6bb5\uff0c\u6bb5\u4e2d\u6709\u91cd\u5b9a\u4f4d\u5185\u5bb9\uff0c\u8282\u533a\u7684\u5c5e\u6027\u5c06\u5305\u542b SHF_ALLOC \u4f4d\uff0c\u5426\u5219\u8be5\u4f4d\u7f6e 0\u3002<\/td><\/tr><tr><td>.rodata<\/td><td>SHT_PROGBITS<\/td><td>SHF_ALLOC<\/td><td>\u8fd9\u4e9b\u8282\u533a\u5305\u542b\u53ea\u8bfb\u6570\u636e\uff0c\u8fd9\u4e9b\u6570\u636e\u901a\u5e38\u53c2\u4e0e\u8fdb\u7a0b\u6620\u50cf\u7684\u4e0d\u53ef\u5199\u6bb5\u3002<\/td><\/tr><tr><td>.rodata1<\/td><td>SHT_PROGBITS<\/td><td>SHF_ALLOC<\/td><td>\u8fd9\u4e9b\u8282\u533a\u5305\u542b\u53ea\u8bfb\u6570\u636e\uff0c\u8fd9\u4e9b\u6570\u636e\u901a\u5e38\u53c2\u4e0e\u8fdb\u7a0b\u6620\u50cf\u7684\u4e0d\u53ef\u5199\u6bb5\u3002<\/td><\/tr><tr><td>.shstrtab<\/td><td>SHT_STRTAB<\/td><td><\/td><td>\u6b64\u8282\u533a\u5305\u542b\u8282\u533a\u540d\u79f0\u3002<\/td><\/tr><tr><td>.strtab<\/td><td>SHT_STRTAB<\/td><td><\/td><td>\u6b64\u8282\u533a\u5305\u542b\u5b57\u7b26\u4e32\uff0c\u901a\u5e38\u662f\u4ee3\u8868\u4e0e\u7b26\u53f7\u8868\u9879\u76f8\u5173\u7684\u540d\u79f0\u3002\u5982\u679c\u6587\u4ef6\u62e5\u6709\u4e00\u4e2a\u53ef\u52a0\u8f7d\u7684\u6bb5\uff0c\u6bb5\u4e2d\u5305\u542b\u7b26\u53f7\u4e32\u8868\uff0c\u8282\u533a\u7684\u5c5e\u6027\u5c06\u5305\u542b SHF_ALLOC \u4f4d\uff0c\u5426\u5219\u8be5\u4f4d\u4e3a 0\u3002<\/td><\/tr><tr><td>.symtab<\/td><td>SHT_SYMTAB<\/td><td><\/td><td>\u6b64\u8282\u533a\u5305\u542b\u4e00\u4e2a\u7b26\u53f7\u8868\u3002\u5982\u679c\u6587\u4ef6\u4e2d\u5305\u542b\u4e00\u4e2a\u53ef\u52a0\u8f7d\u7684\u6bb5\uff0c\u5e76\u4e14\u8be5\u6bb5\u4e2d\u5305\u542b\u7b26\u53f7\u8868\uff0c\u90a3\u4e48\u8282\u533a\u7684\u5c5e\u6027\u4e2d\u5305\u542bSHF_ALLOC \u4f4d\uff0c\u5426\u5219\u8be5\u4f4d\u7f6e\u4e3a 0\u3002<\/td><\/tr><tr><td>.text<\/td><td>SHT_PROGBITS<\/td><td>SHF_ALLOC + SHF_EXECINSTR<\/td><td>\u6b64\u8282\u533a\u5305\u542b\u7a0b\u5e8f\u7684\u53ef\u6267\u884c\u6307\u4ee4\u3002<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">\u6bb5<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u6bb5(Segments)\u662fELF\u6587\u4ef6\u5728\u6267\u884c\u89c6\u56fe(Execution View)\u4e2d\u7684\u57fa\u672c\u5355\u4f4d, \u4e0e\u94fe\u63a5\u89c6\u56fe\u4e2d\u7684\u8282(Sections)\u4e0d\u540c, \u6bb5\u662f\u7a0b\u5e8f\u52a0\u8f7d\u5230\u5185\u5b58\u65f6\u5b9e\u9645\u4f7f\u7528\u7684\u5355\u4f4d.<br>\u94fe\u63a5\u89c6\u56fe\u7684\u8282(Sections)\u63d0\u4f9b\u4e86\u975e\u5e38\u7ec6\u7c92\u5ea6\u7684\u7a0b\u5e8f\u7ec4\u7ec7\u65b9\u5f0f, \u8fd9\u5bf9\u7f16\u8bd1\u5668\u548c\u94fe\u63a5\u5668\u5f88\u6709\u7528. \u4f46\u5bf9\u64cd\u4f5c\u7cfb\u7edf\u52a0\u8f7d\u5668\u6765\u8bf4, \u5904\u7406\u5927\u91cf\u8282\u4f1a\u589e\u52a0\u590d\u6742\u6027\u5e76\u964d\u4f4e\u6548\u7387. \u6bb5\u63d0\u4f9b\u4e86\u4e00\u79cd\u66f4\u9ad8\u5c42\u6b21\u7684\u62bd\u8c61, \u5c06\u5177\u6709\u76f8\u4f3c\u5c5e\u6027(\u5982\u5185\u5b58\u6743\u9650)\u7684\u591a\u4e2a\u8282\u7ec4\u5408\u5728\u4e00\u8d77, \u7b80\u5316\u4e86\u52a0\u8f7d\u8fc7\u7a0b.<br>\u4e00\u4e2a\u7b80\u5355elf\u53ef\u6267\u884c\u6587\u4ef6\u5185\u5b58\u5e03\u5c40\u5982\u4e0b<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\u865a\u62df\u5730\u5740\u7a7a\u95f4\n+------------------+ \u9ad8\u5730\u5740\n|      \u6808\u533a\u57df      |\n|        \u2193         |\n|                  |\n|        \u2191         |\n|      \u5806\u533a\u57df      |\n+------------------+\n|    \u672a\u6620\u5c04\u533a\u57df    |\n+------------------+\n|                  |\n|    \u6570\u636e\u6bb5(rw-)   | \u2190 \u5305\u542b.data, .bss\u7b49\u8282\n|                  |\n+------------------+\n|                  |\n|   \u4ee3\u7801\u6bb5(r-x)    | \u2190 \u5305\u542b.text, .rodata\u7b49\u8282\n|                  |\n+------------------+ \u4f4e\u5730\u5740\n<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">\u8282\u533a\u7c7b\u578b<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">\u5b57\u7b26\u4e32\u8868\u8282\u533a<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u5bf9\u4e8e\u5b57\u7b26\u4e32\u8868\u7c7b\u578bSHT_STRTAB\u6765\u8bf4\uff0c\u5176\u5305\u542b\u4e86\u4ee5NULL(0)\u7ed3\u5c3e\u7684\u5b57\u7b26\u4e32\u5e8f\u5217\uff0c\u5bf9\u5b57\u7b26\u4e32\u7684\u5f15\u7528\u901a\u5e38\u4ee5\u5b57\u7b26\u4e32\u5728\u8868\u4e2d\u7684\u4e0b\u6807\u6765\u7ed9\u51fa\uff0c\u4f8b\u5982\u8282\u533a\u5934\u8868\u7684sh_name\uff0c\u4fbf\u662f\u4f7f\u7528\u8fd9\u79cd\u65b9\u5f0f\u6765\u7ed9\u51fa\u81ea\u8eab\u7684\u540d\u5b57\uff0c\u8282\u533a\u5934\u8868\u5173\u8054\u7684\u65f6.shstrtab\u8282(Section Header String Table)<br><\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/8.210.123.186\/wp-content\/uploads\/2026\/03\/image-10.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"901\" height=\"523\" data-original=\"http:\/\/8.210.123.186\/wp-content\/uploads\/2026\/03\/image-10.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-120\"  sizes=\"auto, (max-width: 901px) 100vw, 901px\" \/><\/div><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">\u7b26\u53f7\u8868\u8282\u533a<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u5bf9\u4e8e\u7b26\u53f7\u8868\u7c7b\u578bSHT_SYMTAB, \u5176\u5305\u542b\u4e86\u7528\u6765\u5b9a\u4f4d\u3001\u91cd\u5b9a\u4f4d\u7a0b\u5e8f\u4e2d\u7b26\u53f7\u5b9a\u4e49\u548c\u5f15\u7528\u7684\u4fe1\u606f, \u8868\u9879\u5b57\u6bb5\u542b\u4e49\u5982\u4e0b<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u5b57\u6bb5<\/th><th>\u8bf4\u660e<\/th><\/tr><\/thead><tbody><tr><td>st_name<\/td><td>\u7b26\u53f7\u5728\u5b57\u7b26\u4e32\u8868\u4e2d\u5bf9\u5e94\u7684\u7d22\u5f15. \u5982\u679c\u8be5\u503c\u975e 0, \u5219\u5b83\u8868\u793a\u4e86\u7ed9\u51fa\u7b26\u53f7\u540d\u7684\u5b57\u7b26\u4e32\u8868\u7d22\u5f15, \u5426\u5219\u7b26\u53f7\u8868\u9879\u6ca1\u6709\u540d\u79f0. \u6ce8: \u5916\u90e8 C \u7b26\u53f7\u5728 C \u8bed\u8a00\u548c\u76ee\u6807\u6587\u4ef6\u7684\u7b26\u53f7\u8868\u4e2d\u5177\u6709\u76f8\u540c\u7684\u540d\u79f0.<\/td><\/tr><tr><td>st_value<\/td><td>\u7ed9\u51fa\u4e0e\u7b26\u53f7\u76f8\u5173\u8054\u7684\u6570\u503c, \u5177\u4f53\u53d6\u503c\u4f9d\u8d56\u4e8e\u4e0a\u4e0b\u6587, \u53ef\u80fd\u662f\u4e00\u4e2a\u6b63\u5e38\u7684\u6570\u503c\u3001\u4e00\u4e2a\u5730\u5740\u7b49\u7b49.<\/td><\/tr><tr><td>st_size<\/td><td>\u7ed9\u51fa\u5bf9\u5e94\u7b26\u53f7\u6240\u5360\u7528\u7684\u5927\u5c0f. \u5982\u679c\u7b26\u53f7\u6ca1\u6709\u5927\u5c0f\u6216\u8005\u5927\u5c0f\u672a\u77e5, \u5219\u6b64\u6210\u5458\u4e3a0.<\/td><\/tr><tr><td>st_info<\/td><td>\u7ed9\u51fa\u7b26\u53f7\u7684\u7c7b\u578b\u548c\u7ed1\u5b9a\u5c5e\u6027. \u4e4b\u540e\u4f1a\u7ed9\u51fa\u82e5\u5e72\u53d6\u503c\u548c\u542b\u4e49\u7684\u7ed1\u5b9a\u5173\u7cfb.<\/td><\/tr><tr><td>st_other<\/td><td>\u76ee\u524d\u4e3a0, \u5176\u542b\u4e49\u6ca1\u6709\u88ab\u5b9a\u4e49.<\/td><\/tr><tr><td>st_shndx<\/td><td>\u6bcf\u4e2a\u7b26\u53f7\u8868\u9879\u90fd\u4ee5\u548c\u5176\u4ed6\u8282\u533a\u95f4\u7684\u5173\u7cfb\u7ed9\u51fa\u5b9a\u4e49, \u6b64\u6210\u5458\u7ed9\u51fa\u76f8\u5173\u7684\u8282\u533a\u5934\u8868\u7d22\u5f15<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">st_value<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">ELF\u89c4\u8303\u4e2d\u5bf9\u4e8e\u7b26\u53f7\u7684\u5bfb\u5740\u903b\u8f91\uff0c\u5bf9\u53d8\u91cf\uff08OBJECT\uff09\u548c\u51fd\u6570\uff08FUNC\uff09\u662f\u4e00\u89c6\u540c\u4ec1\u7684\u3002\u51b3\u5b9ast_value\u771f\u5b9e\u542b\u4e49\u7684\u552f\u4e00\u6807\u51c6\u662f\uff1a\u5f53\u524dELF\u6587\u4ef6\u7684\u7c7b\u578b\uff08\u53ef\u91cd\u5b9a\u4f4d\u3001\u53ef\u6267\u884c\u3001\u5171\u4eab\u5e93\uff09 \u4ee5\u53ca \u8be5\u7b26\u53f7\u6240\u5904\u7684\u7279\u6b8a\u8282\u533a\u7d22\u5f15 (st_shndx)<br>st_value\u7684\u542b\u4e49\u7531\u4ee5\u4e0b\u56e0\u7d20\u51b3\u5b9a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u6587\u4ef6\u7c7b\u578b\uff08\u53ef\u91cd\u5b9a\u4f4d\u6587\u4ef6\uff0c\u53ef\u6267\u884c\u6587\u4ef6\u6216\u5171\u4eab\u5bf9\u8c61\u6587\u4ef6\uff09<\/li>\n\n\n\n<li>\u7b26\u53f7\u7ed1\u5b9a\u7c7b\u578b\uff08\u5c40\u90e8\uff0c\u5168\u5c40\uff0c\u5f31\u7b26\u53f7\uff09<\/li>\n\n\n\n<li>\u5728\u53ef\u91cd\u5b9a\u4f4d\u6587\u4ef6(.o\u6587\u4ef6), \u5bf9\u4e8e\u6240\u6709\u5df2\u5b9a\u4e49\u7684\u7b26\u53f7(\u65e0\u8bba\u662f\u53d8\u91cf\u8fd8\u662f\u51fd\u6570), st_value\u90fd\u8868\u793a\u8282\u533a\u504f\u79fb\u91cf, \u4e5f\u5c31\u662f\u76f8\u5bf9\u4e8e\u7531st_shndx\u6807\u8bc6\u7684\u8282\u533a\u8d77\u59cb\u4f4d\u7f6e\u7684\u504f\u79fb\u91cf. \u8fd9\u4e00\u70b9\u5bf9\u4e8e\u53d8\u91cf\u548c\u51fd\u6570\u672c\u8d28\u4e0a\u662f\u76f8\u540c\u7684<\/li>\n\n\n\n<li>\u5728\u53ef\u6267\u884c\u6587\u4ef6\u6216\u5171\u4eab\u5bf9\u8c61\u6587\u4ef6\u4e2d: \u5bf9\u4e8e\u6240\u6709\u5df2\u5b9a\u4e49\u7684\u7b26\u53f7,st_value\u90fd\u8868\u793a\u865a\u62df\u5185\u5b58\u5730\u5740<br>c\u4ee3\u7801\u6f14\u793a<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>#include &lt;stdio.h&gt;\n\n\/\/ \u5168\u5c40\u53d8\u91cf\nint global_var = 42;\n\n\/\/ \u9759\u6001\u5168\u5c40\u53d8\u91cf\nstatic int static_global = 100;\n\n\/\/ \u51fd\u6570\u58f0\u660e\nvoid another_function(void);\n\nint main(void) {\n    int local_var = 10;\n    printf(\"\u5168\u5c40\u53d8\u91cf: %d\\n\", global_var);\n    another_function();\n    return 0;\n}\n\nvoid another_function(void) {\n    printf(\"\u53e6\u4e00\u4e2a\u51fd\u6570\u88ab\u8c03\u7528\\n\");\n}\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u8fb9\u6211\u4eec\u4e3b\u8981\u5173\u6ce8\u4e09\u4e2a\u7b26\u53f7: \u5168\u5c40\u53d8\u91cfglobal_var, \u9759\u6001\u5168\u5c40\u53d8\u91cfstatic_global\u4ee5\u53ca\u4e00\u4e2a\u51fd\u6570another_function<br>\u9996\u5148\u4f7f\u7528-c\u9009\u9879\u7f16\u8bd1\u51fa\u6765.o\u76ee\u6807\u6587\u4ef6, \u5e76\u67e5\u770b\u5176\u7b26\u53f7\u8868\u4ee5\u53ca\u8282\u533a\u5934\u8868<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>$ gcc -c symbols.c -o symbols.o\n\n$ readelf -s symbols.o\n\nSymbol table '.symtab' contains 10 entries:\n   Num:    Value          Size Type    Bind   Vis      Ndx Name\n     0: 0000000000000000     0 NOTYPE  LOCAL  DEFAULT  UND\n     1: 0000000000000000     0 FILE    LOCAL  DEFAULT  ABS symbols.c\n     2: 0000000000000000     0 SECTION LOCAL  DEFAULT    1 .text\n     3: 0000000000000004     4 OBJECT  LOCAL  DEFAULT    3 static_global\n     4: 0000000000000000     0 SECTION LOCAL  DEFAULT    5 .rodata\n     5: 0000000000000000     4 OBJECT  GLOBAL DEFAULT    3 global_var\n     6: 0000000000000000    55 FUNC    GLOBAL DEFAULT    1 main\n     7: 0000000000000000     0 NOTYPE  GLOBAL DEFAULT  UND printf\n     8: 0000000000000037    22 FUNC    GLOBAL DEFAULT    1 another_function\n     9: 0000000000000000     0 NOTYPE  GLOBAL DEFAULT  UND puts\n\n$ readelf -S symbols.o\nThere are 14 section headers, starting at offset 0x3d8:\n\nSection Headers:\n  &#91;Nr] Name              Type             Address           Offset\n       Size              EntSize          Flags  Link  Info  Align\n  &#91; 0]                   NULL             0000000000000000  00000000\n       0000000000000000  0000000000000000           0     0     0\n  &#91; 1] .text             PROGBITS         0000000000000000  00000040\n       000000000000004d  0000000000000000  AX       0     0     1\n  &#91; 2] .rela.text        RELA             0000000000000000  000002a0\n       0000000000000090  0000000000000018   I      11     1     8\n  &#91; 3] .data             PROGBITS         0000000000000000  00000090\n       0000000000000008  0000000000000000  WA       0     0     4\n\n       ...\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u901a\u8fc7\u67e5\u770b\u8282\u533a\u5934\u8868, \u53ef\u4ee5\u770b\u5230\u7d22\u5f15Ndx 1, 3\u5206\u522b\u5bf9\u5e94.text\u4ee3\u7801\u6bb5\u4ee5\u53ca.data\u6570\u636e\u6bb5, \u6b64\u65f6st_value\u8868\u793a\u8be5\u7b26\u53f7\u5728\u5bf9\u5e94\u7684\u5206\u533a\u7684\u504f\u79fb\u91cf,\u4f7f\u7528objdump\u8fdb\u884c\u9a8c\u8bc1<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>#################\n## \u67e5\u770b\u6570\u636e\u6bb5 ###\n#################\n$ objdump -s -j .data symbols.o\n\nsymbols.o:     file format elf64-x86-64\n\nContents of section .data:\n 0000 2a000000 64000000                    *...d...\n\n\n#################\n## \u67e5\u770b\u4ee3\u7801\u6bb5 ###\n#################\n# \u76f4\u63a5\u67e5\u770b .text \u4e0d\u591f\u76f4\u89c2\n$ objdump -s -j .text symbols.o\n\n# \u53cd\u6c47\u7f16\u67e5\u770b\u4ee3\u7801\u6bb5\n$ objdump -d symbols.o\n\nsymbols.o:     file format elf64-x86-64\n\n\nDisassembly of section .text:\n\n0000000000000000 &lt;main&gt;:\n   0:\t55                   \tpush   %rbp\n   1:\t48 89 e5             \tmov    %rsp,%rbp\n   4:\t48 83 ec 10          \tsub    $0x10,%rsp\n   8:\tc7 45 fc 0a 00 00 00 \tmovl   $0xa,-0x4(%rbp)\n   f:\t8b 05 00 00 00 00    \tmov    0x0(%rip),%eax        # 15 &lt;main+0x15&gt;\n  15:\t89 c6                \tmov    %eax,%esi\n  17:\t48 8d 05 00 00 00 00 \tlea    0x0(%rip),%rax        # 1e &lt;main+0x1e&gt;\n  1e:\t48 89 c7             \tmov    %rax,%rdi\n  21:\tb8 00 00 00 00       \tmov    $0x0,%eax\n  26:\te8 00 00 00 00       \tcall   2b &lt;main+0x2b&gt;\n  2b:\te8 00 00 00 00       \tcall   30 &lt;main+0x30&gt;\n  30:\tb8 00 00 00 00       \tmov    $0x0,%eax\n  35:\tc9                   \tleave\n  36:\tc3                   \tret\n\n0000000000000037 &lt;another_function&gt;:\n  37:\t55                   \tpush   %rbp\n  38:\t48 89 e5             \tmov    %rsp,%rbp\n  3b:\t48 8d 05 00 00 00 00 \tlea    0x0(%rip),%rax        # 42 &lt;another_function+0xb&gt;\n  42:\t48 89 c7             \tmov    %rax,%rdi\n  45:\te8 00 00 00 00       \tcall   4a &lt;another_function+0x13&gt;\n  4a:\t90                   \tnop\n  4b:\t5d                   \tpop    %rbp\n  4c:\tc3                   \tret\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u53ef\u4ee5\u770b\u5230:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5728.data\u4e2d, \u4ee5\u5c0f\u7aef\u5e8f\u5b58\u653e\u774042\u548c100\u4e24\u4e2a\u5168\u5c40\u53d8\u91cf\u7684\u503c<\/li>\n\n\n\n<li>.text\u4e3a\u6c47\u7f16\u540e\u7684\u4ee3\u7801, \u4f7f\u7528objdump -d\u67e5\u770b\u53cd\u6c47\u7f16\u540e\u7684\u4ee3\u7801, \u53ef\u4ee5\u770b\u5230\u5728\u5bf9\u5e94\u504f\u79fb\u91cf\u7684\u4f4d\u7f6e\u4e3aanother_function<br>\u6240\u4ee5\u65e0\u8bba\u662f\u51fd\u6570\u8fd8\u662f\u53d8\u91cf, st_value\u90fd\u662f\u5bf9\u5e94\u8282\u533a\u7684\u504f\u79fb\u91cf<br>\u4e0b\u9762\u5206\u6790\u53ef\u6267\u884c\u6587\u4ef6\u4e2d\u7684\u60c5\u51b5, \u6211\u4eec\u9700\u8981\u9a8c\u8bc1: st_value\u8868\u793a\u865a\u62df\u5730\u5740\u7684\u4f4d\u7f6e<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>$ readelf -s symbols\n...\nSymbol table '.symtab' contains 28 entries:\n   Num:    Value          Size Type    Bind   Vis      Ndx Name\n     0: 0000000000000000     0 NOTYPE  LOCAL  DEFAULT  UND\n     1: 0000000000000000     0 FILE    LOCAL  DEFAULT  ABS symbols.c\n     2: 0000000000004024     4 OBJECT  LOCAL  DEFAULT   24 static_global\n     3: 0000000000000000     0 FILE    LOCAL  DEFAULT  ABS\n    12: 0000000000001198     0 FUNC    GLOBAL HIDDEN    15 _fini\n    13: 0000000000001180    22 FUNC    GLOBAL DEFAULT   14 another_function\n    14: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND printf@GLIBC_2.2.5\n    15: 0000000000004020     4 OBJECT  GLOBAL DEFAULT   24 global_var\n    16: 0000000000004010     0 NOTYPE  GLOBAL DEFAULT   24 __data_start\n... \n$ readelf -S symbols\nThere are 30 section headers, starting at offset 0x3580:\nSection Headers:\n  &#91;Nr] Name              Type             Address           Offset\n       Size              EntSize          Flags  Link  Info  Align\n  &#91;14] .text             PROGBITS         0000000000001050  00001050\n       0000000000000146  0000000000000000  AX       0     0     16\n  &#91;24] .data             PROGBITS         0000000000004010  00003010\n       0000000000000018  0000000000000000  WA       0     0     8\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u4ecereadelf\u7684\u7ed3\u679c\u53ef\u4ee5\u770b\u5230, \u76f8\u6bd4\u4e8e\u76ee\u6807\u6587\u4ef6, \u53ef\u6267\u884c\u6587\u4ef6\u7684st_value\u7684\u503c\u5df2\u7ecf\u53d8\u5f97\u5927\u5f97\u591a\u4e86, \u5c3d\u7ba1\u4ecd\u7136\u901a\u8fc7Ndx\u6307\u5411\u6570\u636e\u6bb5\u548c\u4ee3\u7801\u6bb5, \u4f46\u6b64\u65f6\u8be5\u5b57\u6bb5\u7684\u542b\u4e49\u5df2\u7ecf\u53d8\u6210\u4e86\u5bf9\u5e94\u7b26\u53f7\u5728\u8fd0\u884c\u65f6\u7684\u865a\u62df\u5730\u5740\u7684\u7a7a\u95f4\u4e86\u3002\u6211\u4eec\u4f7f\u7528gdb\u8fdb\u884c\u9a8c\u8bc1<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>$ gdb .\/symbols\nGNU gdb (GDB) 15.2\n\n(gdb) info address another_function\nSymbol \"another_function\" is at 0x1180 in a file compiled without debugging.\n(gdb) info address global_var\nSymbol \"global_var\" is at 0x4020 in a file compiled without debugging.\n(gdb) info address static_global\nSymbol \"static_global\" is at 0x4024 in a file compiled without debugging.\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">gdb\u7684\u8f93\u51fa\u4e0e\u7b26\u53f7\u8868\u7684\u8f93\u51fa\u7edf\u4e00<br>\u8865\uff1a<br><strong>\u5728\u53ef\u91cd\u5b9a\u4f4d\u6587\u4ef6\u4e2d\uff08<code>.o<\/code> \u6587\u4ef6\uff0c<code>ET_REL<\/code>\uff09<\/strong><br>\u6b64\u65f6\u6587\u4ef6\u5c1a\u672a\u94fe\u63a5\uff0c\u5e76\u6ca1\u6709\u7edd\u5bf9\u7684\u5185\u5b58\u865a\u62df\u5730\u5740\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u542b\u4e49\uff1a\u8282\u533a\u5185\u7684\u504f\u79fb\u91cf\uff08Section Offset\uff09\u3002<\/li>\n\n\n\n<li>\u8bf4\u660e\uff1a\u53ea\u8981\u7b26\u53f7\u5df2\u88ab\u5b9a\u4e49\uff0c<code>st_value<\/code> \u5c31\u8868\u793a\u8be5\u7b26\u53f7\u6240\u5728\u8282\u533a\uff08\u7531 <code>st_shndx<\/code> \u6307\u5b9a\uff09\u8d77\u59cb\u4f4d\u7f6e\u5230\u8be5\u7b26\u53f7\u7684\u5b57\u8282\u504f\u79fb\u3002<\/li>\n\n\n\n<li>\u65e0\u8bba\u5b83\u662f\u8868\u793a\u4ee3\u7801\u7684\u51fd\u6570\uff0c\u8fd8\u662f\u8868\u793a\u6570\u636e\u7684\u53d8\u91cf\uff0c\u4e00\u5f8b\u90fd\u662f\u76f8\u5bf9\u81ea\u5df1\u6240\u5728\u6bb5\u7684\u504f\u79fb<br><strong>\u5728\u53ef\u6267\u884c\u6587\u4ef6\u6216\u5171\u4eab\u5e93\u4e2d\uff08\u53ef\u8fd0\u884c\u7a0b\u5e8f\u6216 <code>.so<\/code> \u6587\u4ef6\uff0c<code>ET_EXEC<\/code> \/ <code>ET_DYN<\/code>\uff09<\/strong><br>\u6b64\u65f6\u6587\u4ef6\u5df2\u7ecf\u8fc7\u4e86\u94fe\u63a5\u5668\u7684\u5904\u7406\uff0c\u5404\u4e2a\u6bb5\u88ab\u5206\u914d\u4e86\u56fa\u5b9a\u7684\u8fd0\u884c\u65f6\u52a0\u8f7d\u5730\u5740\u3002<\/li>\n\n\n\n<li>\u542b\u4e49\uff1a\u8fd0\u884c\u65f6\u7684\u865a\u62df\u5185\u5b58\u5730\u5740\uff08Virtual Memory Address, VMA\uff09\u3002<\/li>\n\n\n\n<li>\u8bf4\u660e\uff1a\u94fe\u63a5\u5668\u5728\u5408\u5e76\u5404\u4e2a <code>.o<\/code> \u6587\u4ef6\u540e\uff0c\u4f1a\u8ba1\u7b97\u51fa\u7b26\u53f7\u5728\u5185\u5b58\u4e2d\u7684\u6700\u7ec8\u865a\u62df\u5730\u5740\uff0c\u5e76\u5c06\u5176\u76f4\u63a5\u586b\u5165 <code>st_value<\/code>\u3002\u64cd\u4f5c\u7cfb\u7edf\u52a0\u8f7d\u7a0b\u5e8f\u65f6\uff0c\u53ef\u4ee5\u76f4\u63a5\u4f7f\u7528\u8fd9\u4e2a\u865a\u62df\u5730\u5740\u8fdb\u884c\u5de5\u4f5c\uff0c\u65e0\u9700\u518d\u505a\u590d\u6742\u7684\u504f\u79fb\u8ba1\u7b97\u3002<\/li>\n\n\n\n<li>\u6ce8\uff1a\u5bf9\u4e8e\u52a8\u6001\u5171\u4eab\u5e93\uff08PIE \/ <code>.so<\/code>\uff09\uff0c\u8be5\u503c\u901a\u5e38\u662f\u76f8\u5bf9\u4e8e\u5171\u4eab\u5e93\u52a0\u8f7d\u57fa\u5740\u7684\u76f8\u5bf9\u865a\u62df\u5730\u5740\uff08RVA\uff09\u3002<br><strong>\u4e24\u79cd\u7279\u6b8a\u60c5\u51b5\u4e0b\u7684 <code>st_value<\/code><\/strong><br>\u5982\u679c\u7b26\u53f7\u7684\u8282\u533a\u7d22\u5f15 (<code>st_shndx<\/code>) \u662f\u51e0\u4e2a\u7279\u5b9a\u7684\u9b54\u6cd5\u503c\uff0c<code>st_value<\/code> \u4f1a\u6709\u5b8c\u5168\u4e0d\u540c\u7684\u89e3\u91ca\uff1a<\/li>\n\n\n\n<li>\u5c5e\u4e8e <code>SHN_COMMON<\/code>\uff08\u901a\u5e38\u4e3a\u672a\u521d\u59cb\u5316\u7684\u5168\u5c40\u53d8\u91cf\uff09\uff1a\n<ul class=\"wp-block-list\">\n<li>\u6b64\u65f6 <code>st_value<\/code> \u4e0d\u4ee3\u8868\u5730\u5740\u6216\u504f\u79fb\uff0c\u800c\u662f\u4ee3\u8868\u8be5\u7b26\u53f7\u5728\u6700\u7ec8\u88ab\u5206\u914d\u5185\u5b58\u65f6\u9700\u8981\u7684\u5b57\u8282\u5bf9\u9f50\u7ea6\u675f\uff08Alignment Requirement\uff09\u3002\u6bd4\u5982 <code>st_value = 4<\/code>\uff0c\u610f\u5473\u7740\u94fe\u63a5\u5668\u672a\u6765\u7ed9\u5b83\u5206\u914d\u5185\u5b58\u65f6\uff0c\u5730\u5740\u5fc5\u987b\u662f4\u7684\u500d\u6570\u3002<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>\u5c5e\u4e8e <code>SHN_UNDEF<\/code>\uff08\u672a\u5b9a\u4e49\u7b26\u53f7\uff0c\u5982\u8c03\u7528\u5916\u90e8\u5e93\u7684 <code>printf<\/code>\uff09\uff1a\n<ul class=\"wp-block-list\">\n<li>\u6b64\u65f6\u7b26\u53f7\u7684\u5b9e\u4f53\u4e0d\u5728\u6b64\u6587\u4ef6\u4e2d\uff0c<code>st_value<\/code> \u901a\u5e38\u6052\u4e3a <strong>0<\/strong>\u3002<br><strong>\u516c\u5f0f<\/strong><br>\u5982\u679c \u662f\u53ef\u91cd\u5b9a\u4f4d\u6587\u4ef6 (<code>.o<\/code>)\uff1a<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>\u7b26\u53f7\u6587\u4ef6\u504f\u79fb = <code>\u5bf9\u5e94\u8282\u533a\u7684\u6587\u4ef6\u57fa\u5730\u5740 (sh_offset) + st_value<\/code><br>\u5982\u679c\u662f\u53ef\u6267\u884c\u6587\u4ef6 \/ \u5171\u4eab\u5e93\uff1a<\/li>\n\n\n\n<li>\u7b26\u53f7\u6587\u4ef6\u504f\u79fb = <code>st_value - \u5bf9\u5e94\u6bb5\u7684\u865a\u62df\u57fa\u5730\u5740 (sh_addr) + \u5bf9\u5e94\u6bb5\u7684\u6587\u4ef6\u57fa\u5730\u5740 (sh_offset)<\/code><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">st_info<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">st_info\u4e2d\u5305\u542b\u7b26\u53f7\u7c7b\u578b\u548c\u7ed1\u5b9a\u4fe1\u606f, \u8fd9\u91cc\u7ed9\u51fa\u4e86\u63a7\u5236\u5b83\u7684\u503c\u7684\u65b9\u5f0f\u5177\u4f53\u4fe1\u606f\u5982\u4e0b<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>#define ELF32_ST_TYPE(i)    ((i)&amp;0xf)                   # \u4f4e 4 \u4f4d\n#define ELF32_ST_INFO(b, t) (((b)&lt;&lt;4) + ((t)&amp;0xf))      # \u9ad8 4 \u4f4d\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u7b26\u53f7\u7c7b\u578b\u5982\u4e0b:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u540d\u79f0<\/th><th>\u53d6\u503c<\/th><th>\u8bf4\u660e<\/th><\/tr><\/thead><tbody><tr><td>STT_NOTYPE<\/td><td>0<\/td><td>\u7b26\u53f7\u7684\u7c7b\u578b\u6ca1\u6709\u5b9a\u4e49.<\/td><\/tr><tr><td>STT_OBJECT<\/td><td>1<\/td><td>\u7b26\u53f7\u4e0e\u67d0\u4e2a\u6570\u636e\u5bf9\u8c61\u76f8\u5173, \u6bd4\u5982\u4e00\u4e2a\u53d8\u91cf\u3001\u6570\u7ec4\u7b49\u7b49.<\/td><\/tr><tr><td>STT_FUNC<\/td><td>2<\/td><td>\u7b26\u53f7\u4e0e\u67d0\u4e2a\u51fd\u6570\u6216\u8005\u5176\u4ed6\u53ef\u6267\u884c\u4ee3\u7801\u76f8\u5173.<\/td><\/tr><tr><td>STT_SECTION<\/td><td>3<\/td><td>\u7b26\u53f7\u4e0e\u67d0\u4e2a\u8282\u533a\u76f8\u5173. \u8fd9\u79cd\u7c7b\u578b\u7684\u7b26\u53f7\u8868\u9879\u4e3b\u8981\u7528\u4e8e\u91cd\u5b9a\u4f4d, \u901a\u5e38\u5177\u6709 STB_LOCAL \u7ed1\u5b9a.<\/td><\/tr><tr><td>STT_FILE<\/td><td>4<\/td><td>\u4e00\u822c\u60c5\u51b5\u4e0b, \u7b26\u53f7\u7684\u540d\u79f0\u7ed9\u51fa\u4e86\u751f\u6210\u8be5\u76ee\u6807\u6587\u4ef6\u76f8\u5173\u7684\u6e90\u6587\u4ef6\u7684\u540d\u79f0. \u5982\u679c\u5b58\u5728\u7684\u8bdd, \u8be5\u7b26\u53f7\u5177\u6709 STB_LOCAL \u7ed1\u5b9a, \u5176\u8282\u533a\u7d22\u5f15\u662f SHN_ABS \u4e14\u4f18\u5148\u7ea7\u6bd4\u5176\u4ed6STB_LOCAL\u7b26\u53f7\u9ad8.<\/td><\/tr><tr><td>STT_LOPROC\uff5eSTT_HIPROC<\/td><td>13~15<\/td><td>\u4fdd\u7559\u7528\u4e8e\u7279\u5b9a\u5904\u7406\u5668<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u5171\u4eab\u76ee\u6807\u6587\u4ef6\u4e2d\u7684\u51fd\u6570\u7b26\u53f7\u6bd4\u8f83\u7279\u6b8a\uff0c\u5f53\u53e6\u4e00\u4e2a\u76ee\u6807\u6587\u4ef6\u4ece\u5171\u4eab\u6587\u4ef6\u4e2d\u5f15\u7528\u4e00\u4e2a\u51fd\u6570\u65f6\uff0c\u94fe\u63a5\u5668\u81ea\u52a8\u4e3a\u88ab\u5f15\u7528\u7b26\u53f7\u521b\u5efa\u8fc7\u7a0b\u94fe\u63a5\u8868\uff08plt)\u9879\uff0c\u5171\u4eab\u76ee\u6807\u4e2d\u51fa\u4e86STT_FUNC\uff0c\u5176\u4ed6\u7b26\u53f7\u5c06\u4e0d\u4f1a\u901a\u8fc7\u8fc7\u7a0b\u94fe\u63a5\u8868\u81ea\u52a8\u88ab\u5f15\u7528<br>\u8865\uff1a<br><strong>\u52a8\u6001\u5e93\u7b26\u53f7\u5f15\u7528\u4e0ePlT\u673a\u5236<\/strong><br>\u5728ELF\u7684\u52a8\u6001\u94fe\u63a5\uff08\u5982\u8c03\u7528.so\u5171\u4eab\u5e93\uff09\u4e2d\uff0c\u94fe\u63a5\u5668\u5bf9\u51fd\u6570\u7b26\u53f7\u548c\u6570\u636e\u7b26\u53f7\u7684\u5f15\u7528\u6709\u4e00\u5957\u7279\u6b8a\u7684\u533a\u522b\u5bf9\u5f85\u673a\u5236\u3002<br>\u5f53\u524d\u7a0b\u5e8f\u5f15\u7528\u4e86\u5916\u90e8\u5171\u4eab\u5e93\uff08.so\uff09\u4e2d\u7684\u7b26\u53f7\u65f6\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u51fd\u6570\u7b26\u53f7 (STT_FUNC)\u00a0\uff1a\u94fe\u63a5\u5668\u4f1a\u4e3a\u5b83\u81ea\u52a8\u751f\u6210\u8fc7\u7a0b\u94fe\u63a5\u8868\uff08PLT, Procedure Linkage Table\uff09\u9879\u3002<\/li>\n\n\n\n<li>\u6570\u636e\u5bf9\u8c61\/\u53d8\u91cf (STT_OBJECT)\u00a0\uff1a\u4e0d\u4f1a\u751f\u6210PLT\u3002\u53d8\u91cf\u901a\u5e38\u76f4\u63a5\u901a\u8fc7\u5168\u5c40\u504f\u79fb\u8868\uff08GOT, Global Offset Table\uff09\u8fdb\u884c\u5bfb\u5740\u8bbf\u95ee\u3002<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>PLT<\/strong><br>PLT\u5b9e\u9645\u4e0a\u662f\u4e00\u6bb5\u5145\u5f53\u4e2d\u95f4\u8df3\u677f\u7684\u5b58\u6839\u4ee3\u7801\uff08Stub\uff09\u3002<br>\u5f53\u4f60\u8c03\u7528\u5916\u90e8\u5171\u4eab\u5e93\u7684\u51fd\u6570\uff08\u6bd4\u5982&nbsp;printf\uff09\u65f6\uff0c\u7a0b\u5e8f\u4e0d\u662f\u76f4\u63a5\u8df3\u5230printf\u7684\u771f\u5b9e\u5730\u5740\uff0c\u800c\u662f\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u5148\u8df3\u5230\u8be5\u51fd\u6570\u4e13\u5c5e\u7684PLT\u8868\u9879\uff08\u5982printf@plt\uff09\u3002<\/li>\n\n\n\n<li>PLT\u8868\u9879\u53bb\u67e5GOT\u8868\uff08\u8bb0\u5f55\u771f\u5b9e\u5730\u5740\u7684\u8868\u683c\uff09\u3002<\/li>\n\n\n\n<li>\u6700\u540e\u518d\u8df3\u8f6c\u5230\u5916\u90e8\u5171\u4eab\u5e93\u4e2d\u771f\u6b63\u7684\u51fd\u6570\u5730\u5740\u3002<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u4f18\u70b9<\/strong><br>\u8fd9\u79cd\u8c03\u7528\u65b9-&gt;PLT-&gt;GOT-&gt;\u771f\u5b9e\u51fd\u6570\u7684\u989d\u5916\u95f4\u63a5\u5c42\u8bbe\u8ba1\uff0c\u5e26\u6765\u4e86\u4e09\u5927\u52a8\u6001\u94fe\u63a5\u6838\u5fc3\u4f18\u52bf\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u5ef6\u8fdf\u7ed1\u5b9a (Lazy Binding)\u00a0\uff1a\n<ul class=\"wp-block-list\">\n<li>\u7a0b\u5e8f\u521a\u542f\u52a8\u65f6\uff0c\u6ca1\u5fc5\u8981\u628a\u5e93\u91cc\u6210\u767e\u4e0a\u5343\u4e2a\u51fd\u6570\u7684\u771f\u5b9e\u5730\u5740\u5168\u627e\u51fa\u6765\u3002<\/li>\n\n\n\n<li>\u6709\u4e86PLT\u8df3\u677f\uff0c\u51fd\u6570\u5730\u5740\u53ea\u6709\u5728\u5b83\u7b2c\u4e00\u6b21\u88ab\u771f\u6b63\u8c03\u7528\u65f6\u624d\u4f1a\u53bb\u89e3\u6790\uff0c\u6781\u5927\u52a0\u5feb\u4e86\u7a0b\u5e8f\u7684\u542f\u52a8\u901f\u5ea6\u3002<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>\u4f4d\u7f6e\u65e0\u5173\u4e0e\u4ee3\u7801\u5171\u4eab (PIC)\u00a0\uff1a\n<ul class=\"wp-block-list\">\n<li>\u5171\u4eab\u5e93\uff08.so\uff09\u52a0\u8f7d\u5230\u5185\u5b58\u7684\u4f4d\u7f6e\u662f\u968f\u673a\u7684\u3002\u6709\u4e86PLT\/GOT\u673a\u5236\uff0c\u4e3b\u7a0b\u5e8f\u7684\u4ee3\u7801\u4e0d\u7528\u88ab\u4fee\u6539\uff0c\u53ea\u8981\u66f4\u65b0\u8868\u91cc\u7684\u5730\u5740\u5c31\u884c\uff0c\u4ece\u800c\u5b9e\u73b0\u4e86\u591a\u8fdb\u7a0b\u5b8c\u7f8e\u5171\u4eab\u540c\u4e00\u4efd\u7269\u7406\u5185\u5b58\u4e2d\u7684.so\u4ee3\u7801\u3002<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>\u533a\u5206\u6570\u636e\u4e0e\u51fd\u6570\uff1a\n<ul class=\"wp-block-list\">\n<li>\u53d8\u91cf\uff08\u6570\u636e\uff09\u53ea\u662f\u88ab\u8bfb\u53d6\u6216\u5199\u5165\uff0c\u4e0d\u9700\u8981\u6267\u884c\uff0c\u76f4\u63a5\u67e5 GOT \u8868\u5373\u53ef\u3002<\/li>\n\n\n\n<li>\u51fd\u6570\u9700\u8981\u6267\u884c\u6d41\u7a0b\u8df3\u8f6c\uff0c\u4e0d\u4ec5\u9700\u8981\u67e5\u5730\u5740\uff0c\u8fd8\u9700\u8981\u201c\u5ef6\u8fdf\u89e3\u6790\u201d\u76f8\u5173\u7684\u673a\u5236\uff0c\u6240\u4ee5\u591a\u52a0\u4e86\u4e00\u5c42PLT\u8df3\u677f<br>\u8c03\u5916\u90e8\u53d8\u91cf\u76f4\u63a5\u67e5\u8868\uff08GOT\uff09\uff0c\u8c03\u5916\u90e8\u51fd\u6570\u8981\u8fc7\u591a\u4e00\u5c42PLT\u3002PLT\u7684\u5b58\u5728\u5c31\u662f\u4e3a\u4e86\u5b9e\u73b0\u6309\u9700\u89e3\u6790\uff08\u5ef6\u8fdf\u7ed1\u5b9a\uff09\u548c\u52a8\u6001\u8df3\u8f6c\uff08\u4e0d\u65ad\u5b9a\u603b\u7ed3\u5927\u6982\u8bf4\u7684\uff09<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">ELF\u6587\u4ef6\u7684\u4e24\u79cd\u89c6\u56fe<\/h2>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/8.210.123.186\/wp-content\/uploads\/2026\/03\/image-11.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"578\" height=\"351\" data-original=\"http:\/\/8.210.123.186\/wp-content\/uploads\/2026\/03\/image-11.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-121\"  sizes=\"auto, (max-width: 578px) 100vw, 578px\" \/><\/div><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">\u94fe\u63a5\u89c6\u56fe\uff08linking view\uff09<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e3b\u8981\u7528\u4e8e\u94fe\u63a5\u5668\u5904\u7406\uff0c\u5bf9\u5e94\u8282\u5934\u8868\uff0c\u5c06\u6587\u4ef6\u6309\u529f\u80fd\u5212\u5206\u4e3a\u591a\u4e2a\u8282\uff0c\u4e3b\u8981\u7528\u4e8e\u9759\u6001\u94fe\u63a5\u8fc7\u7a0b\uff0c\u7279\u70b9\u662f\u7c92\u5ea6\u7ec6\uff08\u5c31\u662f\u5206\u7c7b\u7ec6\uff09\uff0c\u4fbf\u4e8e\u7f16\u8bd1\u5668\u751f\u6210\u548c\u94fe\u63a5\u5668\u5904\u7406\uff0c\u5b9e\u9645\u6267\u884c\u4e2d\uff0c\u94fe\u63a5\u5668\u4f1a\u5c06\u591a\u4e2a\u8282\u5408\u5e76\u6210\u6bb5\u63d0\u9ad8\u7a7a\u95f4\u5229\u7528\u7387<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u6267\u884c\u89c6\u56fe\uff08execution view\uff09<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e3b\u8981\u7528\u4e8e\u52a0\u8f7d\u5668\u5904\u7406\uff0c\u5bf9\u5e94\u7a0b\u5e8f\u5934\u8868\uff0c\u63cf\u8ff0\u4e86\u600e\u4e48\u5c06\u6587\u4ef6\u5185\u5bb9\u6620\u5c04\u5230\u8fdb\u7a0b\u7684\u865a\u62df\u5730\u5740\u7a7a\u95f4\uff0c\u5173\u6ce8\u6bb5<br>\u6309\u7167\u6743\u9650\u5408\u5e76\uff0c\u6bd4\u5982text\u548crodata\u90fd\u53ea\u8bfb\uff0cdata\u548cbss\u90fd\u53ef\u8bfb\u53ef\u5199<br>\u5e38\u89c1\u6bb5\u7c7b\u578b<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>PT_LOAD,\u901a\u5e38\u4e00\u4e2a\u7a0b\u5e8f\u81f3\u5c11\u4e24\u4e2aptload\u6bb5\uff0c\u4e00\u4e2a\u53ea\u8bfb\uff0c\u4e00\u4e2a\u8bfb\u5199<\/li>\n\n\n\n<li>PT_DYNAMIC\uff0c\u52a8\u6001\u94fe\u63a5\u6bb5\uff0c\u5bf9\u5e94\u8282.dynamic,\u63cf\u8ff0\u9700\u8981\u54ea\u4e2aso\u5e93\uff08DT_NEEDED\uff09\uff0c\u7b26\u53f7\u8868\uff0c\u91cd\u5b9a\u4f4d\u8868\uff0c\u521d\u59cb\u5316\u51fd\u6570\uff0c\u8c03\u7528\u5916\u90e8\u5e93\u51fd\u6570<\/li>\n\n\n\n<li>PT_INTERP\uff0c\u89e3\u91ca\u5668\u8def\u5f84\uff0c\u5bf9\u5e94\u8282.interp\uff0c\u901a\u5e38\u662f\u5b57\u7b26\u4e32\uff0c\u8def\u5f84\u6307\u5411\u52a8\u6001\u94fe\u63a5\u5668\uff0c\u8fd0\u884c\u524d\u51c6\u5907<\/li>\n\n\n\n<li>PT_NOTE\uff0c\u5bf9\u5e94\u8282.note.ABU-tag\u7b49\uff0c\u8f85\u52a9\u8bf4\u660e<\/li>\n\n\n\n<li>PT_TLS\uff0c\u7ebf\u7a0b\u5c40\u90e8\u5b58\u50a8\uff0c\u5bf9\u5e94\u8282\uff0c.tdata,.tbss\uff0c\u544a\u8bc9\u7cfb\u7edf\u5982\u4f55\u4e3a\u6bcf\u4e2a\u7ebf\u7a0b\u521d\u59cb\u5316\u53d8\u91cf<\/li>\n\n\n\n<li>PT_GNU_STACK\uff0c\u6808\u63a7\u5236\uff0c\u865a\u62df\u6bb5\uff0c\u544a\u8bc9\u6808\u662f\u5426\u53ef\u6267\u884c<br>PT\uff0c\u7ed9\u64cd\u4f5c\u7cfb\u7edf\u5185\u6838\u770b\uff0c\u51b3\u5b9a\u6bb5\u5c5e\u6027\uff0cDT\uff0c\u7ed9\u52a8\u6001\u94fe\u63a5\u5668\u770b\uff0c\u51b3\u5b9a\u52a8\u6001\u94fe\u63a5\u7ec6\u8282<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">\u8865<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">\u54c8\u5e0c\u8868\u8282\u533a<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u54c8\u5e0c\u8868\u8282\u533a\u662f\u7528\u4e8e\u5b58\u50a8\u54c8\u5e0c\u503c\u7684\u7279\u6b8a\u8282\u533a\uff0c\u8fd9\u4e9b\u8282\u533a\u4e3b\u8981\u7528\u4e8e\u4ee5\u4e0b\u76ee\u7684<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5b8c\u6574\u6027\u9a8c\u8bc1\uff1a\u5b58\u50a8\u6587\u4ef6\u6216\u7279\u5b9a\u8282\u533a\u54c8\u5e0c\u503c\uff0c\u7528\u4e8e\u9a8c\u8bc1\u6587\u4ef6\u662f\u5426\u88ab\u7be1\u6539<\/li>\n\n\n\n<li>\u6570\u5b57\u7b7e\u540d\uff1a\u652f\u6301\u4ee3\u7801\u7b7e\u540d\u673a\u5236\uff0c\u4ee5\u9a8c\u8bc1\u8f6f\u4ef6\u7684\u6765\u6e90\u548c\u5b8c\u6574\u6027<\/li>\n\n\n\n<li>\u5b89\u5168\u542f\u52a8\uff1a\u5728\u5d4c\u5165\u5f0f\u7cfb\u7edf\u548c\u5b89\u5168\u542f\u52a8\u8fc7\u7a0b\u4e2d\u9a8c\u8bc1\u53ef\u6267\u884c\u6587\u4ef6<\/li>\n\n\n\n<li>\u7b26\u53f7\u67e5\u627e\u52a0\u901f\uff1a\u67d0\u4e9b\u54c8\u5e0c\u8868\u7528\u4e8e\u52a0\u901f\u7b26\u53f7\u67e5\u627e\u8fc7\u7a0b<br>.hash\u662f\u4f20\u7edf\u7684\u54c8\u5e0c\u8868\u8282\u533a, \u4f7f\u7528GNU\u5de5\u5177\u94fe\u5219\u4f1a\u4ee5.gnu.hash\u66ff\u4ee3, \u5176\u6bd4\u4f20\u7edf\u7684.hash\u66f4\u52a0\u9ad8\u6548, \u5360\u7528\u7684\u5185\u5b58\u7a7a\u95f4\u66f4\u5c0f, \u54c8\u5e0c\u51fd\u6570\u4e5f\u66f4\u52a0\u73b0\u4ee3<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u9759\u6001\u94fe\u63a5<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">\u9759\u6001\u94fe\u63a5\u8fc7\u7a0b<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728\u7f16\u8bd1\u65f6\u5c06\u5e93\u4ee3\u7801\u76f4\u63a5\u590d\u5236\u5230\u6700\u7ec8\u53ef\u6267\u884c\u6587\u4ef6\u7684\u94fe\u63a5\u65b9\u5f0f\uff0c\u8fc7\u7a0b\u5982<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u7f16\u8bd1\u5668\u751f\u6210\u76ee\u6807\u6587\u4ef6.o<\/li>\n\n\n\n<li>\u94fe\u63a5\u5668\u626b\u63cf\u6240\u6709\u76ee\u6807\u6587\u4ef6\u548c\u9759\u6001\u5e93.a<\/li>\n\n\n\n<li>\u89e3\u6790\u6240\u6709\u7b26\u53f7\u5f15\u7528<\/li>\n\n\n\n<li>\u5c06\u4f7f\u7528\u7684\u5e93\u4ee3\u7801\u590d\u5236\u5230\u53ef\u6267\u884c\u6587\u4ef6<\/li>\n\n\n\n<li>\u751f\u6210\u5b8c\u5168\u72ec\u7acb\u7684\u53ef\u6267\u884c\u6587\u4ef6<br>\u7279\u70b9\uff1a\u5730\u5740\u9884\u786e\u5b9a\uff0c\u94fe\u63a5\u9636\u6bb5\u4e3a\u6240\u6709\u7b26\u53f7\u5206\u914d\u6700\u7ec8\u865a\u62df\u5730\u5740<\/li>\n<\/ol>\n\n\n\n<h4 class=\"wp-block-heading\">\u9759\u6001\u52a0\u8f7d\u8fc7\u7a0b<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u89e3\u6790elf\u6587\u4ef6\u5934\u90e8\uff0c\u9a8c\u8bc1\u6587\u4ef6\u683c\u5f0f<\/li>\n\n\n\n<li>\u6839\u636e\u7a0b\u5e8f\u5934\u8868\u5c06\u5404\u6bb5\u6620\u5c04\u5230\u94fe\u63a5\u65f6\u786e\u5b9a\u7684\u56fa\u5b9a\u865a\u62df\u5730\u5740<\/li>\n\n\n\n<li>\u5efa\u7acb\u5185\u5b58\u7ba1\u7406\u7ed3\u6784(mm_struct)\u7ba1\u7406\u865a\u62df\u5185\u5b58\u533a\u57df\uff08VMA)<\/li>\n\n\n\n<li>\u521d\u59cb\u5316\u9875\u8868\u6620\u5c04<\/li>\n\n\n\n<li>cpu\u76f4\u63a5\u4eceelf\u5934\u90e8\u7684e_entry\u83b7\u53d6\u5165\u53e3\u5730\u5740\u5f00\u59cb\u6267\u884c<br>\u6240\u6709\u5185\u5b58\u8bbf\u95ee\u90fd\u4f7f\u7528\u7edd\u5bf9\u5730\u5740\uff0c\u901a\u8fc7MMU\u786c\u4ef6\u5c06\u94fe\u63a5\u65f6\u786e\u5b9a\u7684\u865a\u62df\u5730\u5740\u8f6c\u6362\u4e3a\u7269\u7406\u5730\u5740\u3002\u6574\u4e2a\u8fc7\u7a0b\u5b8c\u5168\u590d\u7528\u94fe\u63a5\u9636\u6bb5\u786e\u5b9a\u7684\u5730\u5740\u5e03\u5c40\uff0c\u65e0\u9700\u8fd0\u884c\u65f6\u91cd\u5b9a\u4f4d\u3002<br>\u7279\u70b9\uff1a\u7a0b\u5e8f\u81ea\u5305\u542b\uff0c\u4f46\u53ef\u6267\u884c\u6587\u4ef6\u4f53\u79ef\u5927<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\">\u52a8\u6001\u94fe\u63a5<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">\u52a8\u6001\u94fe\u63a5\u8fc7\u7a0b<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u7a0b\u5e8f\u8fd0\u884c\u65f6\u624d\u52a0\u8f7d\u94fe\u63a5\u548c\u94fe\u63a5\u6240\u9700\u5e93<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u7f16\u8bd1\u5668\u751f\u6210.o<\/li>\n\n\n\n<li>\u94fe\u63a5\u5668\u8bb0\u5f55\u52a8\u6001\u5e93.so\u4ee5\u6765\u4fe1\u606f<\/li>\n\n\n\n<li>\u751f\u6210\u5305\u542b\u4e3a\u89e3\u6790\u7b26\u53f7\u7684\u53ef\u6267\u884c\u6587\u4ef6<\/li>\n\n\n\n<li>\u7a0b\u5e8f\u8fd0\u884c\u65f6\uff0c\u52a8\u6001\u94fe\u63a5\u5668\uff08ld.so\uff09\n<ol class=\"wp-block-list\">\n<li>\u67e5\u627e\u5e76\u52a0\u8f7d\u6240\u9700\u5171\u4eab\u5e93<\/li>\n\n\n\n<li>\u89e3\u6790\u7b26\u53f7\u5f15\u7528<\/li>\n\n\n\n<li>\u6267\u884c\u91cd\u5b9a\u4f4d\u64cd\u4f5c<br>\u7279\u70b9\uff1a\u5730\u5740\u5ef6\u8fdf\u786e\u5b9a\uff0c\u5b9e\u9645\u5730\u5740\u5728\u8fd0\u884c\u65f6\u624d\u89e3\u6790<\/li>\n<\/ol>\n<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\">\u52a8\u6001\u52a0\u8f7d\u8fc7\u7a0b<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u5185\u6838\u6620\u5c04\u4e3b\u7a0b\u5e8f\u7684\u6bb5\u5230\u5185\u5b58<\/li>\n\n\n\n<li>\u52a0\u8f7d\u52a8\u6001\u94fe\u63a5\u5668\uff08ld.so\uff09<\/li>\n\n\n\n<li>\u52a8\u6001\u94fe\u63a5\u5668\u6309\u9700\u52a0\u8f7d\u4f9d\u8d56\u7684\u5171\u4eab\u5e93<\/li>\n\n\n\n<li>\u901a\u8fc7GOT\u548cPLT\u673a\u5236\u5b8c\u6210\u7b26\u53f7\u89e3\u6790\u548c\u5730\u5740\u91cd\u5b9a\u4f4d<\/li>\n\n\n\n<li>\u6240\u6709\u5e93\u4ee3\u7801\u91c7\u7528\u4f4d\u7f6e\u65e0\u5173\u4ee3\u7801\uff08PLC\uff09\u6280\u672f\uff0c\u652f\u6301\u591a\u8fdb\u7a0b\u5171\u4eab<\/li>\n\n\n\n<li>\u652f\u6301ASLR\uff08\u5730\u5740\u7a7a\u95f4\u5e03\u5c40\u968f\u673a\u5316\uff09<br>\u7279\u70b9\uff1a\u8282\u7701\u5185\u5b58\uff0c\u4f9d\u8d56\u7ba1\u7406\u590d\u6742<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u7a0b\u5e8f\u7684\u521d\u59cb\u5316\u4e0e\u7ec8\u6b62\u673a\u5236 (.init &amp; .fini)<\/strong><br>\u521d\u59cb\u5316\u6d41 (<code>.init<\/code> \/ <code>.init_array<\/code>)\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5728\u4e3b\u7a0b\u5e8f <code>main<\/code> \u51fd\u6570\u8fd0\u884c\u524d\uff0c\u7cfb\u7edf\u9700\u8981\u6267\u884c\u76f8\u5173\u7684\u521d\u59cb\u5316\u4ee3\u7801\u3002<\/li>\n\n\n\n<li>\u5bf9\u4e8e\u4f9d\u8d56\u7684\u5171\u4eab\u76ee\u6807\u6587\u4ef6\uff08<code>.so<\/code>\uff09\uff0c\u52a8\u6001\u94fe\u63a5\u5668\u4f1a\u6839\u636e <code>DT_NEEDED<\/code> \u8bb0\u5f55\u7684\u4f9d\u8d56\u56fe\u9012\u5f52\u5730\u6267\u884c\u521d\u59cb\u5316\u3002\u987a\u5e8f\u539f\u5219\u662f\uff1a\u5148\u521d\u59cb\u5316\u88ab\u4f9d\u8d56\u7684\u5e93\uff0c\u6700\u540e\u521d\u59cb\u5316\u81ea\u8eab\u3002<br>\u7ec8\u6b62\u6d41 (<code>.fini<\/code> \/ <code>.fini_array<\/code>)\uff1a<\/li>\n\n\n\n<li>\u5f53\u7a0b\u5e8f\u6b63\u5e38\u9000\u51fa\u65f6\uff0c\u901a\u8fc7 atexit\u673a\u5236\u6267\u884c\u7ec8\u6b62\u4ee3\u7801\u3002<\/li>\n\n\n\n<li>\u7ec8\u6b62\u4ee3\u7801\u7684\u6267\u884c\u987a\u5e8f\u4e0e\u521d\u59cb\u5316\u9636\u6bb5\u5b8c\u5168\u76f8\u53cd\u3002<\/li>\n\n\n\n<li>\u6ce8\u610f\uff1a\u5982\u679c\u7a0b\u5e8f\u8c03\u7528 <code>_exit<\/code> \u51fd\u6570\u5f3a\u5236\u9000\u51fa\uff0c\u6216\u8005\u56e0\u4e3a\u63a5\u6536\u5230\u5f02\u5e38\u4fe1\u53f7\u88ab\u6740\u6389\uff0c<code>.fini<\/code> \u7ec8\u6b62\u4ee3\u7801\u5c06\u4e0d\u4f1a\u88ab\u4fdd\u8bc1\u6267\u884c\u3002<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u52a8\u6001\u94fe\u63a5\u76f8\u5173\u6838\u5fc3\u8282\u533a<\/strong><br><code>.interp<\/code> \u8282 (\u89e3\u91ca\u5668)<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5bf9\u5e94 <code>PT_INTERP<\/code> \u7a0b\u5e8f\u5934\u6bb5\uff0c\u91cc\u9762\u5b58\u50a8\u7684\u662f\u7a0b\u5e8f\u89e3\u91ca\u5668\uff08\u901a\u5e38\u662f\u52a8\u6001\u94fe\u63a5\u5668\uff0c\u5982 <code>ld-linux.so<\/code>\uff09\u7684\u7edd\u5bf9\u8def\u5f84\u3002<\/li>\n\n\n\n<li>\u5f53\u7cfb\u7edf\u6267\u884c\u7a0b\u5e8f\u65f6\uff0c\u5e76\u4e0d\u4f1a\u76f4\u63a5\u53bb\u8dd1\u8be5\u7a0b\u5e8f\uff0c\u800c\u662f\u5148\u63d0\u53d6\u6b64\u8def\u5f84\u52a0\u8f7d\u89e3\u91ca\u5668\uff0c\u628a\u63a7\u5236\u6743\u4ea4\u7ed9\u89e3\u91ca\u5668\u3002\u7531\u89e3\u91ca\u5668\u8d1f\u8d23\u6620\u5c04\u76ee\u6807\u6587\u4ef6\u3001\u52a0\u8f7d\u76f8\u5173\u7684\u52a8\u6001\u5e93\uff0c\u6700\u540e\u518d\u628a\u63a7\u5236\u6743\u4ea4\u8fd8\u7ed9\u5e94\u7528\u7a0b\u5e8f\u3002<\/li>\n\n\n\n<li>\u5730\u5740\u51b2\u7a81\u5904\u7406\uff1a\u7531\u4e8e\u53ef\u6267\u884c\u6587\u4ef6\u5e38\u88ab\u52a0\u8f7d\u5230\u56fa\u5b9a\u5730\u5740\uff0c\u89e3\u91ca\u5668\u901a\u5e38\u88ab\u7f16\u8bd1\u4e3a\u201c\u4f4d\u7f6e\u65e0\u5173\uff08\u5730\u5740\u72ec\u7acb\uff09\u201d\uff0c\u4ee5\u907f\u514d\u4e24\u8005\u7684\u865a\u62df\u57fa\u5740\u53d1\u751f\u51b2\u7a81\u3002<br><code>.dynamic<\/code> \u8282 (\u52a8\u6001\u94fe\u63a5\u952e\u503c\u8868)<\/li>\n\n\n\n<li>\u5bf9\u5e94 <code>PT_DYNAMIC<\/code> \u6bb5\uff0c\u8fd9\u662f\u52a8\u6001\u94fe\u63a5\u5668\u5de5\u4f5c\u65f6\u7684\u201c\u67e5\u8868\u5b57\u5178\u201d\u3002\u5b83\u672c\u8d28\u4e0a\u662f\u4e00\u4e2a\u7531 <code>Elf32_Dyn<\/code> \u7ed3\u6784\u4f53\u7ec4\u6210\u7684\u952e\u503c\u5bf9\u6570\u7ec4\u3002<\/li>\n\n\n\n<li>\u7ed3\u6784\u4f53\u4e2d\u5305\u542b <code>d_tag<\/code>\uff08\u7528\u4e8e\u8bf4\u660e\u8be5\u9879\u662f\u4ec0\u4e48\u4fe1\u606f\uff09\u4ee5\u53ca\u8054\u5408\u4f53 <code>d_un<\/code>\uff08\u5b58\u6709\u5177\u4f53\u7684\u6570\u503c <code>d_val<\/code> \u6216\u865a\u62df\u5185\u5b58\u5730\u5740 <code>d_ptr<\/code>\uff09\u3002<br>\u5e38\u89c1\u4e14\u6838\u5fc3\u7684 Tag (<code>d_tag<\/code>) \u5305\u62ec\uff1a<\/li>\n\n\n\n<li><code>DT_NEEDED<\/code>\uff1a\u58f0\u660e\u5f53\u524d\u6587\u4ef6\u4f9d\u8d56\u4e86\u54ea\u4e2a\u52a8\u6001\u5e93\uff08\u5b58\u7684\u662f\u5b57\u7b26\u4e32\u8868\u504f\u79fb\uff09\u3002<\/li>\n\n\n\n<li><code>DT_STRTAB<\/code> \/ <code>DT_SYMTAB<\/code> \/ <code>DT_HASH<\/code>\uff1a\u6307\u51fa\u52a8\u6001\u5b57\u7b26\u4e32\u8868\u3001\u52a8\u6001\u7b26\u53f7\u8868\u53ca\u7b26\u53f7\u54c8\u5e0c\u8868\u5728\u5185\u5b58\u4e2d\u7684\u5730\u5740\u3002<\/li>\n\n\n\n<li><code>DT_REL<\/code> \/ <code>DT_RELA<\/code>\uff1a\u6307\u5411\u91cd\u5b9a\u4f4d\u8868\u7684\u5730\u5740\uff0c\u52a8\u6001\u94fe\u63a5\u5668\u4f9d\u6b64\u8fdb\u884c\u5730\u5740\u4fee\u6b63\u3002<\/li>\n\n\n\n<li><code>DT_INIT<\/code> \/ <code>DT_FINI<\/code>\uff1a\u6307\u660e\u4e0a\u8ff0\u63d0\u5230\u7684\u521d\u59cb\u5316\u548c\u7ec8\u6b62\u51fd\u6570\u7684\u5177\u4f53\u5730\u5740\u3002<\/li>\n\n\n\n<li><code>DT_PLTGOT<\/code> \/ <code>DT_JMPREL<\/code>\uff1a\u63d0\u4f9b\u7ed9\u5ef6\u8fdf\u7ed1\u5b9a\u673a\u5236\uff08PLT\/GOT\uff09\u4f7f\u7528\u7684\u76f8\u5173\u8868\u5730\u5740\u3002<\/li>\n\n\n\n<li><code>DT_BIND_NOW<\/code>\uff1a\u82e5\u51fa\u73b0\u6b64\u6807\u8bb0\uff0c\u52a8\u6001\u94fe\u63a5\u5668\u5c06\u65e0\u89c6\u5ef6\u8fdf\u7ed1\u5b9a\uff0c\u5728\u79fb\u4ea4\u63a7\u5236\u6743\u524d\u5f3a\u884c\u5b8c\u6210\u6240\u6709\u7b26\u53f7\u7684\u91cd\u5b9a\u4f4d\u3002<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u540d\u79f0<\/th><th>\u6570\u503c<\/th><th>d_un<\/th><th>\u53ef\u6267\u884c<\/th><th>\u5171\u4eab \u76ee\u6807<\/th><th>\u8bf4\u660e<\/th><\/tr><\/thead><tbody><tr><td>DT_NULL<\/td><td>0<\/td><td>\u5ffd\u7565<\/td><td>\u5fc5\u9700<\/td><td>\u5fc5\u9700<\/td><td>\u6807\u5fd7\u7740 _DYNAMIC \u6570\u7ec4\u7684\u672b\u7aef\u3002<\/td><\/tr><tr><td>DT_NEEDED<\/td><td>1<\/td><td>d_val<\/td><td>\u53ef\u9009<\/td><td>\u53ef\u9009<\/td><td>\u5305\u542b\u4ee5NULL \u7ed3\u5c3e\u7684\u5b57\u7b26\u4e32\u7684\u5b57\u7b26\u4e32\u8868\u504f\u79fb\uff0c\u8be5\u5b57\u7b26\u4e32\u7ed9\u51fa\u67d0\u4e2a\u9700\u8981\u7684\u5e93\u7684\u540d\u79f0\u3002\u6240\u4f7f\u7528\u7684\u7d22\u5f15\u4e3aDT_STRTAB\u7684\u4e0b\u6807\u3002\u52a8\u6001\u6570\u7ec4\u4e2d\u53ef\u4ee5\u5305\u542b\u5f88\u591a\u4e2a\u8fd9\u79cd\u7c7b\u578b\u7684\u6807\u8bb0\u3002\u8fd9\u4e9b\u9879\u5728\u8fd9\u79cd\u7c7b\u578b\u6807\u8bb0\u4e2d\u7684\u76f8\u5bf9\u987a\u5e8f\u6bd4\u8f83\u91cd\u8981\u3002\u4f46\u662f\u4e0e\u5176\u5b83\u7684\u6807\u8bb0\u4e4b\u524d\u7684\u987a\u5e8f\u5012\u65e0\u6240\u8c13\u3002\u5bf9\u5e94\u7684\u6bb5\u4e3a.gnu.version_r\u3002<\/td><\/tr><tr><td>DT_PLTRELSZ<\/td><td>2<\/td><td>d_val<\/td><td>\u53ef\u9009<\/td><td>\u53ef\u9009<\/td><td>\u7ed9\u51fa\u4e0e\u8fc7\u7a0b\u94fe\u63a5\u8868\u76f8\u5173\u7684\u91cd\u5b9a\u4f4d\u9879\u7684\u603b\u7684\u5927\u5c0f\u3002\u5982\u679c\u5b58\u5728DT_JMPREL\u7c7b\u578b\u7684\u9879\uff0c\u90a3\u4e48DT_PLTRELSZ\u4e5f\u5fc5\u987b\u5b58\u5728\u3002<\/td><\/tr><tr><td>DT_PLTGOT<\/td><td>3<\/td><td>d_ptr<\/td><td>\u53ef\u9009<\/td><td>\u53ef\u9009<\/td><td>\u7ed9\u51fa\u4e0e\u8fc7\u7a0b\u94fe\u63a5\u8868\u6216\u8005\u5168\u5c40\u504f\u79fb\u8868\u76f8\u5173\u8054\u7684\u5730\u5740\uff0c\u5bf9\u5e94\u7684\u6bb5.got.plt<\/td><\/tr><tr><td>DT_HASH<\/td><td>4<\/td><td>d_ptr<\/td><td>\u5fc5\u9700<\/td><td>\u5fc5\u9700<\/td><td>\u6b64\u7c7b\u578b\u8868\u9879\u5305\u542b\u7b26\u53f7\u54c8\u5e0c\u8868\u7684\u5730\u5740\u3002\u6b64\u54c8\u5e0c\u8868\u6307\u7684\u662f\u88ab DT_SYMTAB \u5f15\u7528\u7684\u7b26\u53f7\u8868\u3002<\/td><\/tr><tr><td>DT_STRTAB<\/td><td>5<\/td><td>d_ptr<\/td><td>\u5fc5\u9700<\/td><td>\u5fc5\u9700<\/td><td>\u6b64\u7c7b\u578b\u8868\u9879\u5305\u542b\u52a8\u6001\u5b57\u7b26\u4e32\u8868\u7684\u5730\u5740\u3002\u7b26\u53f7\u540d\u3001\u5e93\u540d\u3001\u548c\u5176\u5b83\u5b57\u7b26\u4e32\u90fd\u5305\u542b\u5728\u6b64\u8868\u4e2d\u3002\u5bf9\u5e94\u7684\u8282\u7684\u540d\u5b57\u5e94\u8be5\u662f.dynstr\u3002<\/td><\/tr><tr><td>DT_SYMTAB<\/td><td>6<\/td><td>d_ptr<\/td><td>\u5fc5\u9700<\/td><td>\u5fc5\u9700<\/td><td>\u6b64\u7c7b\u578b\u8868\u9879\u5305\u542b\u52a8\u6001\u7b26\u53f7\u8868\u7684\u5730\u5740\u3002\u5bf9 32 \u4f4d\u7684\u6587\u4ef6\u800c\u8a00\uff0c\u8fd9\u4e2a\u7b26\u53f7\u8868\u4e2d\u7684\u6761\u76ee\u7684\u7c7b\u578b\u4e3a Elf32_Sym\u3002<\/td><\/tr><tr><td>DT_RELA<\/td><td>7<\/td><td>d_ptr<\/td><td>\u5fc5\u9700<\/td><td>\u53ef\u9009<\/td><td>\u6b64\u7c7b\u578b\u8868\u9879\u5305\u542b\u91cd\u5b9a\u4f4d\u8868\u7684\u5730\u5740\u3002\u6b64\u8868\u4e2d\u7684\u5143\u7d20\u5305\u542b\u663e\u5f0f\u7684\u8865\u9f50\uff0c\u4f8b\u5982 32 \u4f4d\u6587\u4ef6\u4e2d\u7684 Elf32_Rela\u3002\u76ee\u6807\u6587\u4ef6\u53ef\u80fd\u6709\u591a\u4e2a\u91cd\u5b9a\u4f4d\u8282\u533a\u3002\u5728\u4e3a\u53ef\u6267\u884c\u6587\u4ef6\u6216\u8005\u5171\u4eab\u76ee\u6807\u6587\u4ef6\u521b\u5efa\u91cd\u5b9a\u4f4d\u8868\u65f6\uff0c\u94fe\u63a5\u7f16\u8f91\u5668\u5c06\u8fd9\u4e9b\u8282\u533a\u8fde\u63a5\u8d77\u6765\uff0c\u5f62\u6210\u4e00\u4e2a\u8868\u3002\u5c3d\u7ba1\u5728\u76ee\u6807\u6587\u4ef6\u4e2d\u8fd9\u4e9b\u8282\u533a\u76f8\u4e92\u72ec\u7acb\uff0c\u4f46\u662f\u52a8\u6001\u94fe\u63a5\u5668\u628a\u5b83\u4eec\u89c6\u4e3a\u4e00\u4e2a\u8868\u3002\u5728\u52a8\u6001\u94fe\u63a5\u5668\u4e3a\u53ef\u6267\u884c\u6587\u4ef6\u521b\u5efa\u8fdb\u7a0b\u6620\u50cf\u6216\u8005\u5411\u4e00\u4e2a\u8fdb\u7a0b\u6620\u50cf\u4e2d\u6dfb\u52a0\u67d0\u4e2a\u5171\u4eab\u76ee\u6807\u65f6\uff0c\u8981\u8bfb\u53d6\u91cd\u5b9a\u4f4d\u8868\u5e76\u6267\u884c\u76f8\u5173\u7684\u52a8\u4f5c\u3002\u5982\u679c\u6b64\u5143\u7d20\u5b58\u5728\uff0c\u52a8\u6001\u7ed3\u6784\u4f53\u4e2d\u4e5f\u5fc5\u987b\u5305\u542b DT_RELASZ \u548c DT_RELAENT \u5143\u7d20\u3002\u5982\u679c\u5bf9\u4e8e\u67d0\u4e2a\u6587\u4ef6\u6765\u8bf4\uff0c\u91cd\u5b9a\u4f4d\u662f\u5fc5\u9700\u7684\u8bdd\uff0c\u90a3\u4e48 DT_RELA \u6216\u8005 DT_REL \u90fd\u53ef\u80fd\u5b58\u5728\u3002<\/td><\/tr><tr><td>DT_RELASZ<\/td><td>8<\/td><td>d_val<\/td><td>\u5fc5\u9700<\/td><td>\u53ef\u9009<\/td><td>\u6b64\u7c7b\u578b\u8868\u9879\u5305\u542b DT_RELA \u91cd\u5b9a\u4f4d\u8868\u7684\u603b\u5b57\u8282\u5927\u5c0f\u3002<\/td><\/tr><tr><td>DT_RELAENT<\/td><td>9<\/td><td>d_val<\/td><td>\u5fc5\u9700<\/td><td>\u53ef\u9009<\/td><td>\u6b64\u7c7b\u578b\u8868\u9879\u5305\u542b DT_RELA \u91cd\u5b9a\u4f4d\u9879\u7684\u5b57\u8282\u5927\u5c0f\u3002<\/td><\/tr><tr><td>DT_STRSZ<\/td><td>10<\/td><td>d_val<\/td><td>\u5fc5\u9700<\/td><td>\u5fc5\u9700<\/td><td>\u6b64\u7c7b\u578b\u8868\u9879\u7ed9\u51fa\u5b57\u7b26\u4e32\u8868\u7684\u5b57\u8282\u5927\u5c0f\uff0c\u6309\u5b57\u8282\u6570\u8ba1\u7b97\u3002<\/td><\/tr><tr><td>DT_SYMENT<\/td><td>11<\/td><td>d_val<\/td><td>\u5fc5\u9700<\/td><td>\u5fc5\u9700<\/td><td>\u6b64\u7c7b\u578b\u8868\u9879\u7ed9\u51fa\u7b26\u53f7\u8868\u9879\u7684\u5b57\u8282\u5927\u5c0f\u3002<\/td><\/tr><tr><td>DT_INIT<\/td><td>12<\/td><td>d_ptr<\/td><td>\u53ef\u9009<\/td><td>\u53ef\u9009<\/td><td>\u6b64\u7c7b\u578b\u8868\u9879\u7ed9\u51fa\u521d\u59cb\u5316\u51fd\u6570\u7684\u5730\u5740\u3002<\/td><\/tr><tr><td>DT_FINI<\/td><td>13<\/td><td>d_ptr<\/td><td>\u53ef\u9009<\/td><td>\u53ef\u9009<\/td><td>\u6b64\u7c7b\u578b\u8868\u9879\u7ed9\u51fa\u7ed3\u675f\u51fd\u6570\uff08Termination Function\uff09\u7684\u5730\u5740\u3002<\/td><\/tr><tr><td>DT_SONAME<\/td><td>14<\/td><td>d_val<\/td><td>\u5ffd\u7565<\/td><td>\u53ef\u9009<\/td><td>\u6b64\u7c7b\u578b\u8868\u9879\u7ed9\u51fa\u4e00\u4e2a\u4ee5 NULL \u7ed3\u5c3e\u7684\u5b57\u7b26\u4e32\u7684\u5b57\u7b26\u4e32\u8868\u504f\u79fb\uff0c\u5bf9\u5e94\u7684\u5b57\u7b26\u4e32\u662f\u67d0\u4e2a\u5171\u4eab\u76ee\u6807\u7684\u540d\u79f0\u3002\u8be5\u504f\u79fb\u5b9e\u9645\u4e0a\u662f DT_STRTAB \u4e2d\u7684\u7d22\u5f15\u3002<\/td><\/tr><tr><td>DT_RPATH<\/td><td>15<\/td><td>d_val<\/td><td>\u53ef\u9009<\/td><td>\u5ffd\u7565<\/td><td>\u6b64\u7c7b\u578b\u8868\u9879\u5305\u542b\u4ee5 NULL \u7ed3\u5c3e\u7684\u5b57\u7b26\u4e32\u7684\u5b57\u7b26\u4e32\u8868\u504f\u79fb\uff0c\u5bf9\u5e94\u7684\u5b57\u7b26\u4e32\u662f\u641c\u7d22\u5e93\u65f6\u4f7f\u7528\u7684\u641c\u7d22\u8def\u5f84\u3002\u8be5\u504f\u79fb\u5b9e\u9645\u4e0a\u662f DT_STRTAB \u4e2d\u7684\u7d22\u5f15\u3002<\/td><\/tr><tr><td>DT_SYMBOLIC<\/td><td>16<\/td><td>\u5ffd\u7565<\/td><td>\u5ffd\u7565<\/td><td>\u53ef\u9009<\/td><td>\u5982\u679c\u8fd9\u79cd\u7c7b\u578b\u8868\u9879\u51fa\u73b0\u5728\u5171\u4eab\u76ee\u6807\u5e93\u4e2d\uff0c\u90a3\u4e48\u8fd9\u5c06\u4f1a\u6539\u53d8\u52a8\u6001\u94fe\u63a5\u5668\u7684\u7b26\u53f7\u89e3\u6790\u7b97\u6cd5\u3002\u52a8\u6001\u8fde\u63a5\u5668\u5c06\u9996\u5148\u9009\u62e9\u4ece\u5171\u4eab\u76ee\u6807\u6587\u4ef6\u672c\u8eab\u5f00\u59cb\u641c\u7d22\u7b26\u53f7\uff0c\u53ea\u6709\u5728\u641c\u7d22\u5931\u8d25\u65f6\uff0c\u624d\u4f1a\u9009\u62e9\u4ece\u53ef\u6267\u884c\u6587\u4ef6\u4e2d\u641c\u7d22\u76f8\u5e94\u7684\u7b26\u53f7\u3002<\/td><\/tr><tr><td>DT_REL<\/td><td>17<\/td><td>d_ptr<\/td><td>\u5fc5\u9700<\/td><td>\u53ef\u9009<\/td><td>\u6b64\u7c7b\u578b\u8868\u9879\u4e0e DT_RELA\u7c7b\u578b\u7684\u8868\u9879\u7c7b\u4f3c\uff0c\u53ea\u662f\u5176\u8868\u683c\u4e2d\u5305\u542b\u9690\u5f0f\u7684\u8865\u9f50\uff0c\u5bf9 32 \u4f4d\u6587\u4ef6\u800c\u8a00\uff0c\u5c31\u662f Elf32_Rel\u3002\u5982\u679cELF\u6587\u4ef6\u4e2d\u5305\u542b\u6b64\u5143\u7d20\uff0c\u90a3\u4e48\u52a8\u6001\u7ed3\u6784\u4e2d\u4e5f\u5fc5\u987b\u5305\u542b DT_RELSZ \u548c DT_RELENT \u7c7b\u578b\u7684\u5143\u7d20\u3002<\/td><\/tr><tr><td>DT_RELSZ<\/td><td>18<\/td><td>d_val<\/td><td>\u5fc5\u9700<\/td><td>\u53ef\u9009<\/td><td>\u6b64\u7c7b\u578b\u8868\u9879\u5305\u542b DT_REL \u91cd\u5b9a\u4f4d\u8868\u7684\u603b\u5b57\u8282\u5927\u5c0f\u3002<\/td><\/tr><tr><td>DT_RELENT<\/td><td>19<\/td><td>d_val<\/td><td>\u5fc5\u9700<\/td><td>\u53ef\u9009<\/td><td>\u6b64\u7c7b\u578b\u8868\u9879\u5305\u542b DT_REL \u91cd\u5b9a\u4f4d\u9879\u7684\u5b57\u8282\u5927\u5c0f\u3002<\/td><\/tr><tr><td>DT_PLTREL<\/td><td>20<\/td><td>d_val<\/td><td>\u53ef\u9009<\/td><td>\u53ef\u9009<\/td><td>\u6b64\u7c7b\u578b\u8868\u9879\u7ed9\u51fa\u8fc7\u7a0b\u94fe\u63a5\u8868\u6240\u5f15\u7528\u7684\u91cd\u5b9a\u4f4d\u9879\u7684\u5730\u5740\u3002\u6839\u636e\u5177\u4f53\u60c5\u51b5\uff0c d_val \u5bf9\u5e94\u7684\u5730\u5740\u53ef\u80fd\u5305\u542b DT_REL \u6216\u8005 DT_RELA\u3002\u8fc7\u7a0b\u94fe\u63a5\u8868\u4e2d\u7684\u6240\u6709\u91cd\u5b9a\u4f4d\u90fd\u5fc5\u987b\u91c7\u7528\u76f8\u540c\u7684\u91cd\u5b9a\u4f4d\u65b9\u5f0f\u3002<\/td><\/tr><tr><td>DT_DEBUG<\/td><td>21<\/td><td>d_ptr<\/td><td>\u53ef\u9009<\/td><td>\u5ffd\u7565<\/td><td>\u6b64\u7c7b\u578b\u8868\u9879\u7528\u4e8e\u8c03\u8bd5\u3002ABI \u672a\u89c4\u5b9a\u5176\u5185\u5bb9\uff0c\u8bbf\u95ee\u8fd9\u4e9b\u6761\u76ee\u7684\u7a0b\u5e8f\u53ef\u80fd\u4e0e ABI \u4e0d\u517c\u5bb9\u3002<\/td><\/tr><tr><td>DT_TEXTREL<\/td><td>22<\/td><td>\u5ffd\u7565<\/td><td>\u53ef\u9009<\/td><td>\u53ef\u9009<\/td><td>\u5982\u679c\u6587\u4ef6\u4e2d\u4e0d\u5305\u542b\u6b64\u7c7b\u578b\u7684\u8868\u9879\uff0c\u5219\u8868\u793a\u6ca1\u6709\u4efb\u4f55\u91cd\u5b9a\u4f4d\u8868\u9879\u80fd\u591f\u9020\u6210\u5bf9\u4e0d\u53ef\u5199\u6bb5\u7684\u4fee\u6539\u3002\u5982\u679c\u5b58\u5728\u7684\u8bdd\uff0c\u5219\u53ef\u80fd\u5b58\u5728\u82e5\u5e72\u91cd\u5b9a\u4f4d\u9879\u8bf7\u6c42\u5bf9\u4e0d\u53ef\u5199\u6bb5\u8fdb\u884c\u4fee\u6539\uff0c\u56e0\u6b64\uff0c\u52a8\u6001\u94fe\u63a5\u5668\u53ef\u4ee5\u505a\u76f8\u5e94\u7684\u51c6\u5907\u3002<\/td><\/tr><tr><td>DT_JMPREL<\/td><td>23<\/td><td>d_ptr<\/td><td>\u53ef\u9009<\/td><td>\u53ef\u9009<\/td><td>\u8be5\u7c7b\u578b\u7684\u6761\u76ee\u7684 d_ptr \u6210\u5458\u5305\u542b\u4e86\u8fc7\u7a0b\u94fe\u63a5\u8868\u7684\u5730\u5740\uff0c\u5e76\u4e14\u7d22\u5f15\u65f6\u5e94\u8be5\u4f1a\u628a\u8be5\u5730\u5740\u5f3a\u5236\u8f6c\u6362\u4e3a\u5bf9\u5e94\u7684\u91cd\u5b9a\u4f4d\u8868\u9879\u7c7b\u578b\u7684\u6307\u9488\u3002\u628a\u91cd\u5b9a\u4f4d\u8868\u9879\u5206\u5f00\u6709\u5229\u4e8e\u8ba9\u52a8\u6001\u94fe\u63a5\u5668\u5728\u8fdb\u7a0b\u521d\u59cb\u5316\u65f6\u5ffd\u7565\u5b83\u4eec\uff08\u5f00\u542f\u4e86\u5ef6\u8fdf\u7ed1\u5b9a\uff09\u3002\u5982\u679c\u5b58\u5728\u6b64\u6210\u5458\uff0c\u76f8\u5173\u7684 DT_PLTRELSZ \u548c DT_PLTREL \u5fc5\u987b\u4e5f\u5b58\u5728\u3002<\/td><\/tr><tr><td>DT_BIND_NOW<\/td><td>24<\/td><td>\u5ffd\u7565<\/td><td>\u53ef\u9009<\/td><td>\u53ef\u9009<\/td><td>\u5982\u679c\u53ef\u6267\u884c\u6587\u4ef6\u6216\u8005\u5171\u4eab\u76ee\u6807\u6587\u4ef6\u4e2d\u5b58\u5728\u6b64\u7c7b\u578b\u7684\u8868\u9879\u7684\u8bdd\uff0c\u52a8\u6001\u94fe\u63a5\u5668\u5728\u5c06\u63a7\u5236\u6743\u8f6c\u4ea4\u7ed9\u7a0b\u5e8f\u524d\uff0c\u5e94\u8be5\u5c06\u8be5\u6587\u4ef6\u7684\u6240\u6709\u9700\u8981\u91cd\u5b9a\u4f4d\u7684\u5730\u5740\u90fd\u8fdb\u884c\u91cd\u5b9a\u4f4d\u3002\u8fd9\u4e2a\u8868\u9879\u7684\u4f18\u5148\u6743\u9ad8\u4e8e\u5ef6\u8fdf\u7ed1\u5b9a\uff0c\u53ef\u4ee5\u901a\u8fc7\u73af\u5883\u53d8\u91cf\u6216\u8005dlopen(BA_LIB)\u6765\u8bbe\u7f6e\u3002<\/td><\/tr><tr><td>DT_LOPROC ~DT_HIPROC<\/td><td>0x70000000 ~0x7fffffff<\/td><td>\u672a\u6307\u5b9a<\/td><td>\u672a\u6307\u5b9a<\/td><td>\u672a\u6307\u5b9a<\/td><td>\u8fd9\u4e2a\u8303\u56f4\u7684\u8868\u9879\u662f\u4fdd\u7559\u7ed9\u5904\u7406\u5668\u7279\u5b9a\u7684\u8bed\u4e49\u7684\u3002<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\">.dynstr<\/h4>\n\n\n\n<h4 class=\"wp-block-heading\">.dynsym<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u52a8\u6001\u94fe\u63a5\u7684ELF\u6587\u4ef6\u5177\u6709\u4e13\u95e8\u7684\u52a8\u6001\u7b26\u53f7\u8868\uff0c\u5176\u4f7f\u7528\u7684\u7ed3\u6784\u5c31\u662fElf32_Sym\uff0c\u4f46\u662f\u5176\u5b58\u50a8\u7684\u8282\u4e3a.dynsym\u3002\u8fd9\u91cc\u518d\u6b21\u7ed9\u51faElf32_Sym\u7684\u7ed3\u6784<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>typedef struct\n{\n  Elf32_Word    st_name;   \/* Symbol name (string tbl index) *\/\n  Elf32_Addr    st_value;  \/* Symbol value *\/\n  Elf32_Word    st_size;   \/* Symbol size *\/\n  unsigned char st_info;   \/* Symbol type and binding *\/\n  unsigned char st_other;  \/* Symbol visibility under glibc&gt;=2.2 *\/\n  Elf32_Section st_shndx;  \/* Section index *\/\n} Elf32_Sym;\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u9700\u8981\u6ce8\u610f\u7684\u662f&nbsp;<code>.dynsym<\/code>&nbsp;\u662f\u8fd0\u884c\u65f6\u6240\u9700\u7684\uff0cELF \u6587\u4ef6\u4e2d export\/import \u7684\u7b26\u53f7\u4fe1\u606f\u5168\u5728\u8fd9\u91cc\u3002\u4f46\u662f\uff0c<code>.symtab<\/code>&nbsp;\u8282\u4e2d\u5b58\u50a8\u7684\u4fe1\u606f\u662f\u7f16\u8bd1\u65f6\u7684\u7b26\u53f7\u4fe1\u606f\uff0c\u5b83\u4eec\u5728&nbsp;<code>strip<\/code>&nbsp;\u4e4b\u540e\u4f1a\u88ab\u5220\u9664\u6389\u3002<br>\u6211\u4eec\u4e3b\u8981\u5173\u6ce8\u52a8\u6001\u7b26\u53f7\u4e2d\u7684\u4e24\u4e2a\u6210\u5458<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>st_name\uff0c \u8be5\u6210\u5458\u4fdd\u5b58\u7740\u52a8\u6001\u7b26\u53f7\u5728.dynstr \u8868\uff08\u52a8\u6001\u5b57\u7b26\u4e32\u8868\uff09\u4e2d\u7684\u504f\u79fb\u3002<\/li>\n\n\n\n<li>st_value\uff0c\u5982\u679c\u8fd9\u4e2a\u7b26\u53f7\u88ab\u5bfc\u51fa\uff0c\u8fd9\u4e2a\u7b26\u53f7\u4fdd\u5b58\u7740\u5bf9\u5e94\u7684\u865a\u62df\u5730\u5740\u3002<\/li>\n<\/ul>\n\n\n\n<h5 class=\"wp-block-heading\">\u7b26\u53f7\u7248\u672c<\/h5>\n\n\n\n<p class=\"wp-block-paragraph\">\u52a8\u6001\u7b26\u53f7\u4e0e\u6307\u5411\u5b83\u7684Elf_Verdef\u4fdd\u5b58\u5728.gnu.version\u6bb5\u4e2d\uff0c\u5176\u4e2d\uff0c\u7531Elf_Verneed\u7ed3\u6784\u4f53\u6784\u6210\u7684\u6570\u7ec4\u7684\u6bcf\u4e2a\u5143\u7d20\u5bf9\u5e94\u52a8\u6001\u7b26\u53f7\u8868\u7684\u4e00\u9879\u3002\u5176\u5b9e\uff0c\u8fd9\u4e2a\u7ed3\u6784\u4f53\u5c31\u53ea\u6709\u4e00\u4e2a\u57df\uff1a\u90a3\u5c31\u662f\u4e00\u4e2a16\u4f4d\u7684\u6574\u6570\uff0c\u8868\u793agnu.verion_r\u6bb5\u4e2d\u7684\u4e0b\u6807\u3002<br>\u5728\u8fd9\u6837\u7684\u60c5\u51b5\u4e0b\uff0c\u52a8\u6001\u94fe\u63a5\u5668\u4f7f\u7528Elf_Rel\u7ed3\u6784\u4f53\u6210\u5458r_info\u4e2d\u7684\u4e0b\u6807\u540c\u65f6\u4f5c\u4e3a.dynsym\u6bb5\u548cgnu.version\u6bb5\u7684\u4e0b\u6807\u3002\u8fd9\u6837\u5c31\u53ef\u4ee5\u4e00\u4e00\u5bf9\u5e94\u5230\u6bcf\u4e00\u4e2a\u7b26\u53f7\u5230\u5e95\u662f\u90a3\u4e2a\u7248\u672c\u7684\u4e86\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Relocation Related Sections<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u94fe\u63a5\u5668\u5728\u5904\u7406\u76ee\u6807\u6587\u4ef6\u65f6\uff0c\u9700\u8981\u5bf9\u76ee\u6807\u6587\u4ef6\u4e2d\u7684\u67d0\u4e9b\u4f4d\u7f6e\u8fdb\u884c\u91cd\u5b9a\u4f4d\uff0c\u5373\u5c06\u7b26\u53f7\u6307\u5411\u6070\u5f53\u7684\u4f4d\u7f6e\uff0c\u786e\u4fdd\u7a0b\u5e8f\u6b63\u5e38\u6267\u884c\u3002\u4f8b\u5982\uff0c\u5f53\u7a0b\u5e8f\u8c03\u7528\u4e86\u4e00\u4e2a\u51fd\u6570\u65f6\uff0c\u76f8\u5173\u7684\u8c03\u7528\u6307\u4ee4\u5fc5\u987b\u628a\u63a7\u5236\u6d41\u4ea4\u7ed9\u9002\u5f53\u7684\u76ee\u6807\u6267\u884c\u5730\u5740\u3002<br>\u5728ELF\u6587\u4ef6\u4e2d\uff0c\u5bf9\u4e8e\u6bcf\u4e00\u4e2a\u9700\u8981\u91cd\u5b9a\u4f4d\u7684ELF\u8282\u90fd\u6709\u5bf9\u5e94\u7684\u91cd\u5b9a\u4f4d\u8868\uff0c\u6bd4\u5982\u8bf4.text\u8282\u5982\u679c\u9700\u8981\u91cd\u5b9a\u4f4d\uff0c\u90a3\u4e48\u5176\u5bf9\u5e94\u7684\u91cd\u5b9a\u4f4d\u8868\u4e3a.rel.text\u3002<br>\u4e3e\u4e2a\u4f8b\u5b50\uff0c\u5f53\u4e00\u4e2a\u7a0b\u5e8f\u5bfc\u5165\u67d0\u4e2a\u51fd\u6570\u65f6\uff0c.dynstr\u5c31\u4f1a\u5305\u542b\u5bf9\u5e94\u51fd\u6570\u540d\u79f0\u7684\u5b57\u7b26\u4e32\uff0c.dynsym\u4e2d\u5c31\u4f1a\u5305\u542b\u4e00\u4e2a\u5177\u6709\u76f8\u5e94\u540d\u79f0\u7684\u52a8\u6001\u5b57\u7b26\u4e32\u8868\u7684\u7b26\u53f7\uff08Elf_Sym\uff09\uff0c\u5728rel.dyn\u4e2d\u5c31\u4f1a\u5305\u542b\u4e00\u4e2a\u6307\u5411\u8fd9\u4e2a\u7b26\u53f7\u7684\u7684\u91cd\u5b9a\u4f4d\u8868\u9879<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">.rel(a).dyn\/.rel(a).plt<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">.rel.dyn\u5305\u542b\u4e86\u52a8\u6001\u94fe\u63a5\u7684\u4e8c\u8fdb\u5236\u6587\u4ef6\u4e2d\u9700\u8981\u91cd\u5b9a\u4f4d\u7684\u53d8\u91cf\u7684\u4fe1\u606f\uff0c\u8fd9\u4e9b\u4fe1\u606f\u5728\u52a0\u8f7d\u7684\u65f6\u5019\u5fc5\u987b\u5b8c\u5168\u786e\u5b9a\u3002\u800c.rel.plt\u5305\u542b\u4e86\u9700\u8981\u91cd\u5b9a\u4f4d\u7684\u51fd\u6570\u7684\u4fe1\u606f\u3002\u8fd9\u4e24\u7c7b\u91cd\u5b9a\u4f4d\u8282\u90fd\u4f7f\u7528\u5982\u4e0b\u7684\u7ed3\u6784<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>typedef struct {\n    Elf32_Addr        r_offset;\n    Elf32_Word       r_info;\n} Elf32_Rel;\n\ntypedef struct {\n    Elf32_Addr     r_offset;\n    Elf32_Word    r_info;\n    Elf32_Sword    r_addend;\n} Elf32_Rela;\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Elf32_Rela\u7c7b\u578b\u7684\u8868\u9879\u5305\u542b\u660e\u786e\u7684\u8865\u9f50\u4fe1\u606f\u3002 Elf32_Rel\u7c7b\u578b\u7684\u8868\u9879\u5728\u5c06\u88ab\u4fee\u6539\u7684\u4f4d\u7f6e\u4fdd\u5b58\u9690\u5f0f\u7684\u8865\u9f50\u4fe1\u606f\u3002\u7531\u4e8e\u5904\u7406\u5668\u4f53\u7cfb\u7ed3\u6784\u7684\u539f\u56e0\uff0c\u8fd9\u4e24\u79cd\u5f62\u5f0f\u90fd\u5b58\u5728\uff0c\u751a\u81f3\u662f\u5fc5\u9700\u7684\u3002\u56e0\u6b64\uff0c\u5bf9\u7279\u5b9a\u673a\u5668\u7684\u5b9e\u73b0\u53ef\u4ee5\u4ec5\u4f7f\u7528\u4e00\u79cd\u5f62\u5f0f\uff0c\u4e5f\u53ef\u4ee5\u6839\u636e\u4e0a\u4e0b\u6587\u4f7f\u7528\u4e24\u79cd\u5f62\u5f0f\u3002<br>\u4e00\u822c\u6765\u8bf4\uff0c32\u4f4d\u7a0b\u5e8f\u53ea\u4f7f\u7528Elf32_Rel\uff0c64\u4f4d\u7a0b\u5e8f\u53ea\u4f7f\u7528Elf32_Rela\u3002<br>\u5176\u4e2d\uff0c\u6bcf\u4e2a\u5b57\u6bb5\u7684\u8bf4\u660e\u5982\u4e0b<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u6210\u5458<\/th><th>\u8bf4\u660e<\/th><\/tr><\/thead><tbody><tr><td>r_offset<\/td><td><strong>\u6b64\u6210\u5458\u7ed9\u51fa\u4e86\u9700\u8981\u91cd\u5b9a\u4f4d\u7684\u4f4d\u7f6e\u3002<\/strong>\u5bf9\u4e8e\u4e00\u4e2a\u53ef\u91cd\u5b9a\u4f4d\u6587\u4ef6\u800c\u8a00\uff0c\u6b64\u503c\u662f\u4ece\u9700\u8981\u91cd\u5b9a\u4f4d\u7684\u7b26\u53f7\u6240\u5728\u8282\u533a\u5934\u90e8\u5f00\u59cb\u5230\u5c06\u88ab\u91cd\u5b9a\u4f4d\u7684\u4f4d\u7f6e\u4e4b\u95f4\u7684\u5b57\u8282\u504f\u79fb\u3002\u5bf9\u4e8e\u53ef\u6267\u884c\u6587\u4ef6\u6216\u8005\u5171\u4eab\u76ee\u6807\u6587\u4ef6\u800c\u8a00\uff0c\u5176\u53d6\u503c\u662f\u9700\u8981\u91cd\u5b9a\u4f4d\u7684<strong>\u865a\u62df\u5730\u5740<\/strong>\uff0c\u4e00\u822c\u800c\u8a00\uff0c\u4e5f\u5c31\u662f\u8bf4\u6211\u4eec\u6240\u8bf4\u7684 GOT \u8868\u7684\u5730\u5740\u3002<\/td><\/tr><tr><td>r_info<\/td><td><strong>\u6b64\u6210\u5458\u7ed9\u51fa\u9700\u8981\u91cd\u5b9a\u4f4d\u7684\u7b26\u53f7\u7684\u7b26\u53f7\u8868\u7d22\u5f15\uff0c\u4ee5\u53ca\u76f8\u5e94\u7684\u91cd\u5b9a\u4f4d\u7c7b\u578b\u3002<\/strong>&nbsp;\u4f8b\u5982\u4e00\u4e2a\u8c03\u7528\u6307\u4ee4\u7684\u91cd\u5b9a\u4f4d\u9879\u5c06\u5305\u542b\u88ab\u8c03\u7528\u51fd\u6570\u7684\u7b26\u53f7\u8868\u7d22\u5f15\u3002\u5982\u679c\u7d22\u5f15\u662f STN_UNDEF\uff0c\u90a3\u4e48\u91cd\u5b9a\u4f4d\u4f7f\u7528 0 \u4f5c\u4e3a\u201c\u7b26\u53f7\u503c\u201d\u3002\u6b64\u5916\uff0c\u91cd\u5b9a\u4f4d\u7c7b\u578b\u662f\u548c\u5904\u7406\u5668\u76f8\u5173\u7684\u3002<\/td><\/tr><tr><td>r_addend<\/td><td>\u6b64\u6210\u5458\u7ed9\u51fa\u4e00\u4e2a\u5e38\u91cf\u8865\u9f50\uff0c\u7528\u6765\u8ba1\u7b97\u5c06\u88ab\u586b\u5145\u5230\u53ef\u91cd\u5b9a\u4f4d\u5b57\u6bb5\u7684\u6570\u503c\u3002<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u5f53\u7a0b\u5e8f\u4ee3\u7801\u5f15\u7528\u4e00\u4e2a\u91cd\u5b9a\u4f4d\u9879\u7684\u91cd\u5b9a\u4f4d\u7c7b\u578b\u6216\u8005\u7b26\u53f7\u8868\u7d22\u5f15\u65f6\uff0c\u8fd9\u4e2a\u7d22\u5f15\u662f\u5bf9\u8868\u9879\u7684r_info\u6210\u5458\u5e94\u7528ELF32_R_TYPE\u6216\u8005ELF32_R_SYM\u7684\u7ed3\u679c\u3002 \u4e5f\u5c31\u662f\u8bf4r_info\u7684\u9ad8\u4e09\u4e2a\u5b57\u8282\u5bf9\u5e94\u7684\u503c\u8868\u793a\u8fd9\u4e2a\u52a8\u6001\u7b26\u53f7\u5728.dynsym\u7b26\u53f7\u8868\u4e2d\u7684\u4f4d\u7f6e\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>#define ELF32_R_SYM(i)    ((i)&gt;&gt;8)\n#define ELF32_R_TYPE(i)   ((unsigned char)(i))\n#define ELF32_R_INFO(s,t) (((s)&lt;&lt;8)+(unsigned char)(t))\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u91cd\u5b9a\u4f4d\u8282\u533a\u4f1a\u5f15\u7528\u4e24\u4e2a\u5176\u5b83\u8282\u533a\uff1a<strong>\u7b26\u53f7\u8868\u3001\u8981\u4fee\u6539\u7684\u8282\u533a<\/strong>\u3002\u8282\u533a\u5934\u90e8\u7684sh_info\u548csh_link\u6210\u5458\u7ed9\u51fa\u76f8\u5e94\u7684\u5173\u7cfb\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u91cd\u5b9a\u4f4d\u7c7b\u578b<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u91cd\u5b9a\u4f4d\u8868\u9879\u63cf\u8ff0\u4e86\u5982\u4f55\u4fee\u6539\u76f8\u5173\u7684\u6307\u4ee4\u4e0e\u6570\u636e\u57df\uff0c\u5176\u5bf9\u5e94\u7684\u6bd4\u7279\u4f4d\u5982\u4e0b<br><\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/8.210.123.186\/wp-content\/uploads\/2026\/03\/image-12.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"913\" height=\"189\" data-original=\"http:\/\/8.210.123.186\/wp-content\/uploads\/2026\/03\/image-12.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-122\"  sizes=\"auto, (max-width: 913px) 100vw, 913px\" \/><\/div><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><br>\u5176\u4e2d\uff0cword32\u6307\u5b9a\u4e86\u4e00\u4e2a32\u6bd4\u7279\u7684\u53d8\u91cf\uff0c\u5360\u75284\u4e2a\u5b57\u8282\uff0c\u5bf9\u9f50\u65b9\u5f0f\u4efb\u610f\u3002\u8fd9\u4e9b\u503c\u4f7f\u7528\u548cIntel\u67b6\u6784\u4e2d\u5176\u5b83\u5b57\u7c7b\u4f3c\u7684\u5b57\u8282\u5e8f\uff0c\u4e00\u822c\u90fd\u662f\u5c0f\u7aef\u5e8f<br><\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/8.210.123.186\/wp-content\/uploads\/2026\/03\/image-13.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"478\" height=\"124\" data-original=\"http:\/\/8.210.123.186\/wp-content\/uploads\/2026\/03\/image-13.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-123\"  sizes=\"auto, (max-width: 478px) 100vw, 478px\" \/><\/div><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><br><strong>\u91cd\u5b9a\u4f4d\u8ba1\u7b97\u4e0e\u7c7b\u578b\u89e3\u6790<\/strong><br>\u5728\u5c06\u4e00\u4e2a\u6216\u591a\u4e2a\u53ef\u91cd\u5b9a\u4f4d\u6587\u4ef6\uff08.o\uff09\u5408\u5e76\u3001\u8f6c\u6362\u4e3a\u53ef\u6267\u884c\u6587\u4ef6\u6216\u5171\u4eab\u76ee\u6807\u6587\u4ef6\u65f6\uff0c\u94fe\u63a5\u5668\u4f1a\u9996\u5148\u51b3\u5b9a\u5982\u4f55\u5e03\u5c40\u5404\u4e2a\u88ab\u8f93\u5165\u7684\u6bb5\uff0c\u63a5\u7740\u66f4\u65b0\u7b26\u53f7\u8868\uff0c\u6700\u540e\u5b9e\u65bd\u91cd\u5b9a\u4f4d\u64cd\u4f5c\u3002\u53ef\u6267\u884c\u6587\u4ef6\u4e0e\u5171\u4eab\u76ee\u6807\u6587\u4ef6\u7684\u91cd\u5b9a\u4f4d\u65b9\u6cd5\u57fa\u672c\u76f8\u540c\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728\u8fd9\u90e8\u5206\u91cd\u5b9a\u4f4d\u7684\u8ba1\u7b97\u89c4\u5219\u4e2d\uff0c\u901a\u5e38\u4f7f\u7528\u4ee5\u4e0b\u4e13\u7528\u8bb0\u53f7\u4ee3\u8868\u7279\u5b9a\u7684\u8fd0\u884c\u65f6\u6216\u94fe\u63a5\u65f6\u6570\u636e\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>A (Addend)\uff1a\u91cd\u5b9a\u4f4d\u8ba1\u7b97\u4e2d\u4f7f\u7528\u7684\u5bf9\u9f50\/\u8865\u9f50\u5e38\u6570\u503c\u3002<\/li>\n\n\n\n<li>B (Base)\uff1a\u5171\u4eab\u76ee\u6807\u6587\u4ef6\u5728\u8fd0\u884c\u9636\u6bb5\u5b9e\u9645\u88ab\u52a0\u8f7d\u5230\u5185\u5b58\u91cc\u7684\u57fa\u5730\u5740\uff08\u901a\u5e38\u7f16\u8bd1\u65f6\u5047\u5b9a\u4e3a0\uff0c\u8fd0\u884c\u65f6\u4f1a\u53d1\u751f\u6539\u53d8\uff09\u3002<\/li>\n\n\n\n<li>G (Global)\uff1a\u6267\u884c\u65f6\uff0c\u8be5\u91cd\u5b9a\u4f4d\u7b26\u53f7\u5728\u5168\u5c40\u504f\u79fb\u8868\uff08GOT\uff09\u4e2d\u7684\u5177\u4f53\u504f\u79fb\u91cf\u3002<\/li>\n\n\n\n<li>GOT (Global Offset Table)\uff1a\u5168\u5c40\u504f\u79fb\u8868\u5728\u5185\u5b58\u4e2d\u7684\u9996\u5730\u5740\u3002<\/li>\n\n\n\n<li>L (Linkage)\uff1a\u8fc7\u7a0b\u94fe\u63a5\u8868\uff08PLT\uff09\u91cc\u67d0\u4e2a\u51fd\u6570\u7684\u5165\u53e3\u504f\u79fb\u6216\u865a\u62df\u5730\u5740\u3002\u94fe\u63a5\u5668\u4e8b\u5148\u6784\u9020\u597d\u521d\u59cb\u7684\u8fc7\u7a0b\u94fe\u63a5\u8868\uff0c\u7531\u52a8\u6001\u94fe\u63a5\u5668\u5728\u8fd0\u884c\u671f\u95f4\u8d1f\u8d23\u4fee\u6539\u3002<\/li>\n\n\n\n<li>P (Place)\uff1a\u9700\u8981\u88ab\u91cd\u5b9a\u4f4d\u4fee\u6539\u7684\u5b58\u50a8\u5355\u5143\u81ea\u8eab\u7684\u5185\u5b58\u4f4d\u7f6e\uff08\u7b49\u4e8e r_offset \u7684\u503c\uff0c\u53ef\u4ee5\u662f\u6bb5\u5185\u504f\u79fb\u6216\u7edd\u5bf9\u865a\u62df\u5730\u5740\uff09\u3002<\/li>\n\n\n\n<li>S (Symbol)\uff1a\u91cd\u5b9a\u4f4d\u8868\u9879\u4e2d r_info \u7d22\u5f15\u6240\u6307\u5411\u7684\u90a3\u4e2a\u7b26\u53f7\u7684\u5b9e\u9645\u771f\u503c\uff08\u5982\u53d8\u91cf\u7edd\u5bf9\u5730\u5740\u6216\u76f8\u5bf9\u504f\u79fb\uff09\u3002<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u5e95\u5c42\u5904\u7406\u673a\u5236\u8981\u6c42<\/strong>\uff1a<br>\u91cd\u5b9a\u4f4d\u9879\u7684 r_offset \u5b57\u6bb5\u6307\u660e\u4e86\u53d7\u5f71\u54cd\u7684\u5b58\u50a8\u5355\u5143\u7684\u8d77\u59cb\u504f\u79fb\u6216\u865a\u62df\u5730\u5740\u3002<br>\u5728Intel 32\u4f4d\u67b6\u6784\u4e0b\uff0c\u7a0b\u5e8f\u4e00\u822c\u4ec5\u91c7\u7528\u5177\u6709\u9690\u5f0f\u8865\u9f50\u7684 ELF32_REL \u8868\u9879\u7ed3\u6784\uff0c\u94fe\u63a5\u5668\u4f1a\u76f4\u63a5\u5c06\u5f85\u4fee\u6539\u5185\u5b58\u533a\u57df\u539f\u672c\u4fdd\u7559\u7684\u6570\u636e\u4f5c\u4e3a\u8865\u9f50\u503c\uff08A\uff09\u53c2\u4e0e\u8fd0\u7b97\uff0c\u4e14\u5168\u90e8\u8ba1\u7b97\u8fc7\u7a0b\u4fdd\u6301\u4e0e\u5904\u7406\u5668\u4e00\u81f4\u7684\u5c0f\u7aef\u5b57\u8282\u5e8f\u3002<br>\u5e38\u89c1\u91cd\u5b9a\u4f4d\u7c7b\u578b\u53ca\u5176\u8ba1\u7b97\u89c4\u5219\u5b9a\u4e49\uff1a<br>R_386_32<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u8ba1\u7b97\u65b9\u5f0f\uff1aS + A<\/li>\n\n\n\n<li>\u542b\u4e49\uff1a\u76f4\u63a5\u5c06\u7b26\u53f7\u5730\u5740\u4e0e\u5e38\u6570\u76f8\u52a0\uff0c\u5f97\u51fa\u6700\u7ec8\u7edd\u5bf9\u5730\u5740\u586b\u5165\u76ee\u6807\u3002<br>R_386_PC32<\/li>\n\n\n\n<li>\u8ba1\u7b97\u65b9\u5f0f\uff1aS + A &#8211; P<\/li>\n\n\n\n<li>\u542b\u4e49\uff1a\u8ba1\u7b97\u76f8\u5bf9\u4e8e\u5f53\u524d\u6307\u4ee4\u6240\u5904\u4f4d\u7f6e\uff08Place\uff09\u7684\u76f8\u5bf9\u504f\u79fb\uff0c\u5e38\u7528\u4e8e\u8fd1\u8df3\u8f6c\u6307\u4ee4\u6216\u76f8\u5bf9\u5bfb\u5740\u3002<br>R_386_GOT32<\/li>\n\n\n\n<li>\u8ba1\u7b97\u65b9\u5f0f\uff1aG + A &#8211; P<\/li>\n\n\n\n<li>\u542b\u4e49\uff1a\u8ba1\u7b97\u51fa\u4ece\u5168\u5c40\u504f\u79fb\u8868\u57fa\u5740\u5230\u8be5\u7b26\u53f7\u5bf9\u5e94GOT\u8868\u9879\u4e4b\u95f4\u7684\u8ddd\u79bb\uff0c\u9047\u5230\u6b64\u91cd\u5b9a\u4f4d\u7c7b\u578b\u4f1a\u8ba9\u94fe\u63a5\u5668\u5f3a\u5236\u521b\u5efa\u4e00\u4e2aGOT\u8868\u3002<br>R_386_PLT32<\/li>\n\n\n\n<li>\u8ba1\u7b97\u65b9\u5f0f\uff1aL + A &#8211; P<\/li>\n\n\n\n<li>\u542b\u4e49\uff1a\u8ba1\u7b97\u8df3\u8f6c\u5230\u76ee\u6807\u7b26\u53f7\u7684PLT\u8868\u9879\u7684\u76f8\u5bf9\u5730\u5740\u3002\u540c\u6837\u4f1a\u89e6\u53d1\u94fe\u63a5\u5668\u5f3a\u5236\u5efa\u7acb\u8fc7\u7a0b\u94fe\u63a5\u8868\u3002<br>R_386_COPY<\/li>\n\n\n\n<li>\u8ba1\u7b97\u65b9\u5f0f\uff1a\u65e0<\/li>\n\n\n\n<li>\u542b\u4e49\uff1a\u4e13\u4e3a\u52a8\u6001\u94fe\u63a5\u800c\u751f\u3002\u5b83\u7684\u504f\u79fb\u9879\u6307\u5411\u53ef\u5199\u6570\u636e\u6bb5\uff0c\u901a\u77e5\u52a8\u6001\u94fe\u63a5\u5668\u628a\u5bf9\u5e94\u5171\u4eab\u5bf9\u8c61\u91cc\u9762\u5c5e\u4e8e\u8be5\u7b26\u53f7\u7684\u6570\u636e\u76f4\u63a5\u590d\u5236\u5230\u5f53\u524d\u6307\u5b9a\u7684\u5185\u5b58\u7a7a\u95f4\u4e2d\u3002<br>R_386_GLOB_DAT<\/li>\n\n\n\n<li>\u8ba1\u7b97\u65b9\u5f0f\uff1aS<\/li>\n\n\n\n<li>\u542b\u4e49\uff1a\u5f3a\u884c\u5c06GOT\u8868\u5f53\u4e2d\u7684\u67d0\u4e2a\u7279\u6b8a\u69fd\u4f4d\u8bbe\u7f6e\u4e3a\u76ee\u6807\u7b26\u53f7\u7684\u7edd\u5bf9\u771f\u5b9e\u5730\u5740\u3002<br>R_386_JMP_SLOT<\/li>\n\n\n\n<li>\u8ba1\u7b97\u65b9\u5f0f\uff1aS<\/li>\n\n\n\n<li>\u542b\u4e49\uff1a\u4e13\u4e3a\u52a8\u6001\u51fd\u6570\u7684PLT\u89e3\u6790\u51c6\u5907\u3002\u52a8\u6001\u94fe\u63a5\u5668\u89e3\u6790\u5b8c\u6bd5\u540e\uff0c\u76f4\u63a5\u628a\u76ee\u7684\u51fd\u6570 S \u7684\u7edd\u5bf9\u5730\u5740\u8986\u76d6\u8fdb\u8fd9\u4e2a\u504f\u79fb\u6240\u6307\u5411\u7684\u8868\u9879\u4e2d\uff0c\u4ece\u800c\u5b9e\u73b0\u540e\u7eed\u63a7\u5236\u6743\u7684\u5feb\u901f\u8f6c\u79fb\u3002<br>R_386_RELATIVE<\/li>\n\n\n\n<li>\u8ba1\u7b97\u65b9\u5f0f\uff1aB + A<\/li>\n\n\n\n<li>\u542b\u4e49\uff1a\u57fa\u4e8e\u5171\u4eab\u76ee\u6807\u6587\u4ef6\u7684\u865a\u62df\u57fa\u5730\u5740\u8fdb\u884c\u5e73\u79fb\uff08B+A\uff09\uff0c\u628a\u6240\u5728\u5730\u5740\u7684\u771f\u5b9e\u865a\u62df\u5730\u5740\u8ba1\u7b97\u51fa\u6765\u5e76\u586b\u5165\u3002\u6b64\u7c7b\u91cd\u5b9a\u4f4d\u9879\u7684\u7b26\u53f7\u8868\u7d22\u5f15\u4e00\u822c\u7f6e0\uff08\u4e0d\u4f9d\u8d56\u7279\u5b9a\u7b26\u53f7\u89e3\u6790\uff0c\u4ec5\u91cd\u5b9a\u4f4d\u5730\u5740\uff09\u3002<br>R_386_GOTOFF<\/li>\n\n\n\n<li>\u8ba1\u7b97\u65b9\u5f0f\uff1aS + A &#8211; GOT<\/li>\n\n\n\n<li>\u542b\u4e49\uff1a\u6c42\u51fa\u67d0\u7b26\u53f7\u7684\u5b9e\u9645\u503c\u4e0eGOT\u57fa\u5730\u5740\u4e4b\u95f4\u7684\u504f\u5dee\u91cf\uff0c\u6b64\u64cd\u4f5c\u540c\u6837\u5f3a\u5236\u8981\u6c42\u94fe\u63a5\u5668\u5e03\u7f6eGOT\u8868\u3002<br>R_386_GOTPC<\/li>\n\n\n\n<li>\u8ba1\u7b97\u65b9\u5f0f\uff1aS + A &#8211; P<\/li>\n\n\n\n<li>\u542b\u4e49\uff1a\u7c7b\u4f3c\u4e8ePC32\u76f8\u5bf9\u5bfb\u5740\u8ba1\u7b97\uff0c\u4e13\u95e8\u7528\u4e8e\u5b9a\u4f4dGOT\u8868\u81ea\u8eab\u7684\u4f4d\u7f6e\uff08\u5f15\u7528\u7684\u7279\u6b8a\u7b26\u53f7\u4e3a <em>GLOBAL_OFFSET_TABLE<\/em>\uff09\uff0c\u7528\u6765\u5f15\u5bfc\u7a0b\u5e8f\u627e\u5230\u81ea\u5df1\u7684\u5168\u5c40\u504f\u79fb\u8868\u7684\u57fa\u5740\u3002<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Global Offset Table<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">GOT\u8868\u5728ELF\u6587\u4ef6\u4e2d\u5206\u4e3a\u4e24\u4e2a\u90e8\u5206<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>.got\uff0c\u5b58\u50a8\u5168\u5c40\u53d8\u91cf\u7684\u5f15\u7528\u3002<\/li>\n\n\n\n<li>.got.plt\uff0c\u5b58\u50a8\u51fd\u6570\u7684\u5f15\u7528\u3002<br>\u5176\u76f8\u5e94\u7684\u503c\u7531\u80fd\u591f\u89e3\u6790.rel.plt\u6bb5\u4e2d\u7684\u91cd\u5b9a\u4f4d\u7684\u52a8\u6001\u94fe\u63a5\u5668\u6765\u586b\u5199\u3002<br>\u901a\u5e38\u6765\u8bf4\uff0c\u5730\u5740\u72ec\u7acb\u4ee3\u7801\u4e0d\u80fd\u5305\u542b\u7edd\u5bf9\u865a\u62df\u5730\u5740\u3002GOT\u8868\u4e2d\u5305\u542b\u4e86\u9690\u85cf\u7684\u7edd\u5bf9\u5730\u5740\uff0c\u8fd9\u4f7f\u5f97\u5728\u4e0d\u8fdd\u80cc\u4f4d\u7f6e\u65e0\u5173\u6027\u4ee5\u53ca\u7a0b\u5e8f\u4ee3\u7801\u6bb5\u517c\u5bb9\u7684\u60c5\u51b5\u4e0b\uff0c\u5f97\u5230\u76f8\u5173\u7b26\u53f7\u7684\u7edd\u5bf9\u5730\u5740\u3002\u4e00\u4e2a\u7a0b\u5e8f\u53ef\u4ee5\u4f7f\u7528\u4f4d\u7f6e\u72ec\u7acb\u4ee3\u7801\u6765\u5f15\u7528\u5b83\u7684GOT\u8868\uff0c\u7136\u540e\u63d0\u53d6\u51fa\u6765\u7edd\u5bf9\u7684\u6570\u503c\uff0c\u4ee5\u4fbf\u4e8e\u5c06\u4f4d\u7f6e\u72ec\u7acb\u7684\u5f15\u7528\u91cd\u5b9a\u5411\u5230\u7edd\u5bf9\u7684\u5730\u5740\u3002 \u8fd9\u4e2a\u8868\u5bf9\u4e8e System V\u73af\u5883\u4e2d\u7684\u52a8\u6001\u94fe\u63a5\u6765\u8bf4\u662f\u5fc5\u8981\u7684\uff0c\u4f46\u5176\u5177\u4f53\u7684\u5185\u5bb9\u4ee5\u53ca\u5f62\u5f0f\u4f9d\u8d56\u4e8e\u5904\u7406\u5668\u3002<br>\u521d\u59cb\u65f6\uff0cgot\u8868\u4e2d\u5305\u542b\u91cd\u5b9a\u5411\u5165\u53e3\u6240\u9700\u8981\u7684\u4fe1\u606f\u3002\u5f53\u4e00\u4e2a\u7cfb\u7edf\u4e3a\u53ef\u52a0\u8f7d\u7684\u76ee\u6807\u6587\u4ef6\u521b\u5efa\u5185\u5b58\u6bb5\u65f6\uff0c\u52a8\u6001\u94fe\u63a5\u5668\u4f1a\u5904\u7406\u91cd\u5b9a\u4f4d\u9879\uff0c\u5176\u4e2d\u7684\u4e00\u4e9b\u9879\u7684\u7c7b\u578b\u53ef\u80fd\u662fR_386_GLOB_DAT\uff0c\u8fd9\u4f1a\u6307\u5411got \u8868\u3002\u52a8\u6001\u94fe\u63a5\u5668\u4f1a\u51b3\u5b9a\u76f8\u5173\u7684\u7b26\u53f7\u7684\u503c\uff0c\u8ba1\u7b97\u5b83\u4eec\u7684\u7edd\u5bf9\u5730\u5740\uff0c\u7136\u540e\u5c06\u5408\u9002\u7684\u5185\u5b58\u8868\u9879\u8bbe\u7f6e\u4e3a\u76f8\u5e94\u7684\u503c\u3002\u5c3d\u7ba1\u5728\u94fe\u63a5\u5668\u5efa\u7acb\u76ee\u6807\u6587\u4ef6\u65f6\uff0c\u7edd\u5bf9\u5730\u5740\u8fd8\u5904\u4e8e\u672a\u77e5\u72b6\u6001\uff0c\u52a8\u6001\u94fe\u63a5\u5668\u77e5\u9053\u6240\u6709\u5185\u5b58\u6bb5\u7684\u5730\u5740\uff0c\u56e0\u4e3a\u53ef\u4ee5\u8ba1\u7b97\u6240\u5305\u542b\u7684\u7b26\u53f7\u7684\u7edd\u5bf9\u5730\u5740\u3002<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u5982\u679c\u4e00\u4e2a\u7a0b\u5e8f\u9700\u8981\u76f4\u63a5\u8bbf\u95ee\u4e00\u4e2a\u7b26\u53f7\u7684\u7edd\u5bf9\u5730\u5740\uff0c\u90a3\u4e48\u8fd9\u4e2a\u7b26\u53f7\u5c06\u4f1a\u6709\u4e00\u4e2agot\u8868\u9879\u3002\u7531\u4e8e\u53ef\u6267\u884c\u6587\u4ef6\u4ee5\u53ca\u5171\u4eab\u76ee\u6807\u6587\u4ef6\u90fd\u6709\u5355\u72ec\u7684\u8868\u9879\uff0c\u6240\u4ee5\u4e00\u4e2a\u7b26\u53f7\u7684\u5730\u5740\u53ef\u80fd\u4f1a\u51fa\u73b0\u5728\u591a\u4e2a\u8868\u4e2d\u3002\u52a8\u6001\u94fe\u63a5\u5668\u5728\u628a\u6743\u9650\u7ed9\u5230\u8fdb\u7a0b\u955c\u50cf\u4e2d\u7684\u4ee3\u7801\u6bb5\u524d\uff0c\u4f1a\u5904\u7406\u6240\u6709\u7684got\u8868\u4e2d\u7684\u91cd\u5b9a\u4f4d\u9879\uff0c\u4ee5\u4fbf\u4e8e\u786e\u5b9a\u6240\u6709\u7684\u7edd\u5bf9\u5730\u5740\u5728\u6267\u884c\u8fc7\u7a0b\u4e2d\u662f\u53ef\u4ee5\u8bbf\u95ee\u7684\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">GOT\u8868\u4e2d\u7684\u7b2c0\u9879\u5305\u542b\u52a8\u6001\u7ed3\u6784\u7684\u5730\u5740\uff0c\u7528\u7b26\u53f7<code> _DYNAMIC<\/code>\u6765\u8fdb\u884c\u5f15\u7528\u3002\u8fd9\u4f7f\u5f97\u4e00\u4e2a\u7a0b\u5e8f\uff0c\u4f8b\u5982\u52a8\u6001\u94fe\u63a5\u5668\uff0c\u5728\u6ca1\u6709\u6267\u884c\u5176\u91cd\u5b9a\u5411\u524d\u53ef\u4ee5\u627e\u5230\u5bf9\u5e94\u7684\u52a8\u6001\u7ed3\u6784\u3002\u8fd9\u5bf9\u4e8e\u52a8\u6001\u94fe\u63a5\u5668\u6765\u8bf4\u662f\u975e\u5e38\u91cd\u8981\u7684\uff0c\u56e0\u4e3a\u5b83\u5fc5\u987b\u5728\u4e0d\u4f9d\u8d56\u5176\u5b83\u7a0b\u5e8f\u7684\u60c5\u51b5\u4e0b\u53ef\u4ee5\u91cd\u5b9a\u4f4d\u81ea\u5df1\u7684\u5185\u5b58\u955c\u50cf\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728\u4e0d\u540c\u7684\u7a0b\u5e8f\u4e2d\uff0c\u7cfb\u7edf\u53ef\u80fd\u4f1a\u4e3a\u540c\u4e00\u5171\u4eab\u76ee\u6807\u6587\u4ef6\u9009\u62e9\u4e0d\u540c\u7684\u5185\u5b58\u6bb5\u5730\u5740\uff1b\u751a\u81f3\u5bf9\u4e8e\u540c\u4e00\u4e2a\u7a0b\u5e8f\uff0c\u5728\u4e0d\u540c\u7684\u6267\u884c\u8fc7\u7a0b\u4e2d\uff0c\u4e5f\u4f1a\u6709\u4e0d\u540c\u7684\u5e93\u5730\u5740\u3002\u7136\u800c\uff0c\u4e00\u65e6\u8fdb\u7a0b\u955c\u50cf\u88ab\u5efa\u7acb\uff0c\u5185\u5b58\u6bb5\u7684\u5730\u5740\u5c31\u4e0d\u4f1a\u518d\u6539\u53d8\uff0c\u53ea\u8981\u4e00\u4e2a\u8fdb\u7a0b\u8fd8\u5b58\u5728\uff0c\u5b83\u7684\u5185\u5b58\u6bb5\u5730\u5740\u5c06\u5904\u4e8e\u56fa\u5b9a\u7684\u4f4d\u7f6e\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">GOT\u8868\u7684\u5f62\u5f0f\u4ee5\u53ca\u89e3\u91ca\u4f9d\u8d56\u4e8e\u5177\u4f53\u7684\u5904\u7406\u5668\uff0c\u5bf9\u4e8eIntel\u67b6\u6784\u6765\u8bf4\uff0c<code>_GLOBAL_OFFSET_TABLE_<\/code>&nbsp;\u7b26\u53f7\u53ef\u80fd\u88ab\u7528\u6765\u8bbf\u95ee\u8fd9\u4e2a\u8868\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>extern Elf32_Addr _GLOBAL_OFFSET_TABLE&#91;];\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><code>_GLOBAL_OFFSET_TABLE_<\/code>\u53ef\u80fd\u4f1a\u5728.got\u8282\u7684\u4e2d\u95f4\uff0c\u4ee5\u4fbf\u4e8e\u53ef\u4ee5\u4f7f\u7528\u6b63\u8d1f\u7d22\u5f15\u6765\u8bbf\u95ee\u8fd9\u4e2a\u8868\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728 Linux \u7684\u5b9e\u73b0\u4e2d\uff0c.got.plt \u7684\u524d\u4e09\u9879\u7684\u5177\u4f53\u7684\u542b\u4e49\u5982\u4e0b<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>GOT[0]\uff0c.dynamic\u7684\u5730\u5740\u3002<\/li>\n\n\n\n<li>GOT[1]\uff0c\u6307\u5411\u5185\u90e8\u7c7b\u578b\u4e3alink_map\u7684\u6307\u9488\uff0c\u53ea\u4f1a\u5728\u52a8\u6001\u88c5\u8f7d\u5668\u4e2d\u4f7f\u7528\uff0c\u5305\u542b\u4e86\u8fdb\u884c\u7b26\u53f7\u89e3\u6790\u9700\u8981\u7684\u5f53\u524dELF\u5bf9\u8c61\u7684\u4fe1\u606f\u3002\u6bcf\u4e2alink_map\u90fd\u662f\u4e00\u6761\u53cc\u5411\u94fe\u8868\u7684\u4e00\u4e2a\u8282\u70b9\uff0c\u800c\u8fd9\u4e2a\u94fe\u8868\u4fdd\u5b58\u4e86\u6240\u6709\u52a0\u8f7d\u7684ELF\u5bf9\u8c61\u7684\u4fe1\u606f\u3002<\/li>\n\n\n\n<li>GOT[2]\uff0c\u6307\u5411\u52a8\u6001\u88c5\u8f7d\u5668\u4e2d <code>_dl_runtime_resolve<\/code>\u51fd\u6570\u7684\u6307\u9488\u3002<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">.got.plt\u540e\u9762\u7684\u9879\u5219\u662f\u7a0b\u5e8f\u4e2d\u4e0d\u540c.so\u4e2d\u51fd\u6570\u7684\u5f15\u7528\u5730\u5740\u3002\u4e0b\u9762\u7ed9\u51fa\u4e00\u4e2a\u76f8\u5e94\u7684\u5173\u7cfb\u3002<br><\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/8.210.123.186\/wp-content\/uploads\/2026\/03\/image-14.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"578\" height=\"296\" data-original=\"http:\/\/8.210.123.186\/wp-content\/uploads\/2026\/03\/image-14.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-124\"  sizes=\"auto, (max-width: 578px) 100vw, 578px\" \/><\/div><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Procedure Linkage Table<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">GOT\u8868\u7528\u6765\u5c06\u4f4d\u7f6e\u72ec\u7acb\u7684\u5730\u5740\u91cd\u5b9a\u5411\u4e3a\u7edd\u5bf9\u5730\u5740\uff0c\u4e0e\u6b64\u7c7b\u4f3c\uff0cPLT\u8868\u5c06\u4f4d\u7f6e\u72ec\u7acb\u7684\u51fd\u6570\u91cd\u5b9a\u5411\u5230\u7edd\u5bf9\u5730\u5740\u3002\u4e3b\u8981\u5305\u62ec\u4e24\u90e8\u5206<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>.plt<\/strong>\uff0c\u4e0e\u5e38\u89c1\u5bfc\u5165\u7684\u51fd\u6570\u6709\u5173\uff0c\u5982 read \u7b49\u51fd\u6570\u3002<\/li>\n\n\n\n<li><strong>.plt.got<\/strong>\uff0c\u4e0e\u52a8\u6001\u94fe\u63a5\u6709\u5173\u7cfb\u3002<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728\u52a8\u6001\u94fe\u63a5\u4e0b\uff0c\u7a0b\u5e8f\u6a21\u5757\u4e4b\u95f4\u5305\u542b\u4e86\u5927\u91cf\u7684\u51fd\u6570\u5f15\u7528\uff0c\u7a0b\u5e8f\u5f00\u59cb\u6267\u884c\u524d\uff0c\u52a8\u6001\u94fe\u63a5\u4f1a\u8017\u8d39\u4e0d\u5c11\u65f6\u95f4\u7528\u4e8e\u89e3\u51b3\u6a21\u5757\u4e4b\u95f4\u7684\u51fd\u6570\u5f15\u7528\u7684\u7b26\u53f7\u67e5\u627e\u4ee5\u53ca\u91cd\u5b9a\u4f4d\u3002\u4f46\u662f\uff0c\u5728\u4e00\u4e2a\u7a0b\u5e8f\u8fd0\u884c\u8fc7\u7a0b\u4e2d\uff0c\u53ef\u80fd\u5f88\u591a\u51fd\u6570\u5728\u7a0b\u5e8f\u6267\u884c\u5b8c\u65f6\u90fd\u4e0d\u4f1a\u7528\u5230\uff0c\u56e0\u6b64\u4e00\u5f00\u59cb\u5c31\u628a\u6240\u6709\u51fd\u6570\u90fd\u94fe\u63a5\u597d\u662f\u4e00\u79cd\u6d6a\u8d39\uff0c\u6240\u4ee5 ELF \u91c7\u7528\u4e86\u4e00\u79cd\u5ef6\u8fdf\u7ed1\u5b9a\u7684\u505a\u6cd5\uff0c\u5176\u57fa\u672c\u601d\u60f3\u662f\u51fd\u6570\u7b2c\u4e00\u6b21\u88ab\u7528\u5230\u65f6\u624d\u8fdb\u884c\u7ed1\u5b9a\uff08\u7b26\u53f7\u67e5\u627e\uff0c\u91cd\u5b9a\u4f4d\u7b49\uff09\uff0c\u5982\u679c\u6ca1\u6709\u7528\u5219\u4e0d\u8fdb\u884c\u7ed1\u5b9a\u3002\u6240\u4ee5\u7a0b\u5e8f\u5f00\u59cb\u6267\u884c\u524d\uff0c\u6a21\u5757\u95f4\u7684\u51fd\u6570\u8c03\u7528\u90fd\u6ca1\u6709\u8fdb\u884c\u7ed1\u5b9a\uff0c\u800c\u662f\u9700\u8981\u7528\u5230\u65f6\u624d\u7531\u52a8\u6001\u94fe\u63a5\u5668\u8d1f\u8d23\u7ed1\u5b9a\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u94fe\u63a5\u7f16\u8f91\u5668\u4e0d\u80fd\u591f\u89e3\u6790\u6267\u884c\u6d41\u8f6c\u6362\uff08\u6bd4\u5982\u7a0b\u5e8f\u8c03\u7528\uff09\uff0c\u5373\u4ece\u4e00\u4e2a\u53ef\u6267\u884c\u6587\u4ef6\u6216\u8005\u5171\u4eab\u76ee\u6807\u6587\u4ef6\u5230\u53e6\u4e00\u4e2a\u6587\u4ef6\u3002\u94fe\u63a5\u5668\u5b89\u6392\u7a0b\u5e8f\u5c06\u63a7\u5236\u6743\u4ea4\u7ed9\u8fc7\u7a0b\u94fe\u63a5\u8868\u4e2d\u7684\u8868\u9879\u3002\u5728 Intel \u67b6\u6784\u4e2d\uff0c\u8fc7\u7a0b\u94fe\u63a5\u8868\u5b58\u5728\u4e8e\u5171\u4eab\u4ee3\u7801\u6bb5\u4e2d\uff0c\u4f46\u662f\u4ed6\u4eec\u4f1a\u4f7f\u7528\u5728 GOT \u8868\u4e2d\u7684\u6570\u636e\u3002\u52a8\u6001\u94fe\u63a5\u5668\u4f1a\u51b3\u5b9a\u76ee\u6807\u7684\u7edd\u5bf9\u5730\u5740\uff0c\u5e76\u4e14\u4f1a\u4fee\u6539\u76f8\u5e94\u7684 GOT \u8868\u4e2d\u7684\u5185\u5b58\u955c\u50cf\u3002\u56e0\u6b64\uff0c\u52a8\u6001\u94fe\u63a5\u5668\u53ef\u4ee5\u5728\u4e0d\u8fdd\u80cc\u4f4d\u7f6e\u72ec\u7acb\u4ee5\u53ca\u7a0b\u5e8f\u4ee3\u7801\u6bb5\u517c\u5bb9\u7684\u60c5\u51b5\u4e0b\uff0c\u91cd\u5b9a\u5411 PLT \u9879\u3002\u53ef\u6267\u884c\u6587\u4ef6\u548c\u5171\u4eab\u76ee\u6807\u6587\u4ef6\u90fd\u6709\u72ec\u7acb\u7684 PLT \u8868\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u7edd\u5bf9\u5730\u5740\u7684\u8fc7\u7a0b\u94fe\u63a5\u8868\u5982\u4e0b<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>.PLT0:pushl got_plus_4\n      jmp   *got_plus_8\n      nop; nop\n      nop; nop\n.PLT1:jmp   *name1_in_GOT\n      pushl $offset@PC\n      jmp   .PLT0@PC\n.PLT2:jmp   *name2_in_GOT\n      push  $offset\n      jmp   .PLT0@PC\n      ...\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f4d\u7f6e\u65e0\u5173\u7684\u8fc7\u7a0b\u94fe\u63a5\u8868\u7684\u5730\u5740\u5982\u4e0b<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>.PLT0:pushl 4(%ebx)\n      jmp   *8(%ebx)\n      nop; nop\n      nop; nop\n.PLT1:jmp   *name1_in_GOT(%ebx)\n      pushl $offset\n      jmp   .PLT0@PC\n.PLT2:jmp   *name2_in_GOT(%ebx)\n      push  $offset\n      jmp   .PLT0@PC\n      ...\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u53ef\u4ee5\u770b\u51fa\u8fc7\u7a0b\u94fe\u63a5\u8868\u9488\u5bf9\u4e8e\u7edd\u5bf9\u5730\u5740\u4ee5\u53ca\u4f4d\u7f6e\u72ec\u7acb\u7684\u4ee3\u7801\u7684\u5904\u7406\u4e0d\u540c\u3002\u4f46\u662f\u52a8\u6001\u94fe\u63a5\u5668\u5904\u7406\u5b83\u4eec\u65f6\uff0c\u6240\u4f7f\u7528\u7684\u63a5\u53e3\u662f\u4e00\u6837\u7684\u3002<br>\u52a8\u6001\u94fe\u63a5\u5668\u548c\u7a0b\u5e8f\u6309\u7167\u5982\u4e0b\u65b9\u5f0f\u89e3\u6790\u8fc7\u7a0b\u94fe\u63a5\u8868\u548c\u5168\u5c40\u504f\u79fb\u8868\u7684\u7b26\u53f7\u5f15\u7528\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u5f53\u7b2c\u4e00\u6b21\u5efa\u7acb\u7a0b\u5e8f\u7684\u5185\u5b58\u955c\u50cf\u65f6\uff0c\u52a8\u6001\u94fe\u63a5\u5668\u5c06\u5168\u5c40\u504f\u79fb\u8868\u7684\u7b2c\u4e8c\u4e2a\u548c\u7b2c\u4e09\u4e2a\u9879\u8bbe\u7f6e\u4e3a\u7279\u6b8a\u7684\u503c\uff0c\u4e0b\u9762\u7684\u6b65\u9aa4\u4f1a\u4ed4\u7ec6\u89e3\u91ca\u8fd9\u4e9b\u6570\u503c\u3002<\/li>\n\n\n\n<li>\u5982\u679c\u8fc7\u7a0b\u94fe\u63a5\u8868\u662f\u4f4d\u7f6e\u72ec\u7acb\u7684\u8bdd\uff0c\u90a3\u4e48 GOT \u8868\u7684\u5730\u5740\u5fc5\u987b\u5728 ebx \u5bc4\u5b58\u5668\u4e2d\u3002\u6bcf\u4e00\u4e2a\u8fdb\u7a0b\u955c\u50cf\u4e2d\u7684\u5171\u4eab\u76ee\u6807\u6587\u4ef6\u90fd\u6709\u72ec\u7acb\u7684 PLT \u8868\uff0c\u5e76\u4e14\u7a0b\u5e8f\u53ea\u5728\u540c\u4e00\u4e2a\u76ee\u6807\u6587\u4ef6\u5c06\u63a7\u5236\u6d41\u4ea4\u7ed9 PLT \u8868\u9879\u3002\u56e0\u6b64\uff0c\u8c03\u7528\u51fd\u6570\u8d1f\u8d23\u5728\u8c03\u7528 PLT\u8868\u9879\u4e4b\u524d\uff0c\u5c06\u5168\u5c40\u504f\u79fb\u8868\u7684\u57fa\u5730\u5740\u8bbe\u7f6e\u4e3a\u5bc4\u5b58\u5668\u4e2d\u3002<\/li>\n\n\n\n<li>\u8fd9\u91cc\u4e3e\u4e2a\u4f8b\u5b50\uff0c\u5047\u8bbe\u7a0b\u5e8f\u8c03\u7528\u4e86name1\uff0c\u5b83\u5c06\u63a7\u5236\u6743\u4ea4\u7ed9\u4e86 lable .PLT1\u3002<\/li>\n\n\n\n<li>\u90a3\u4e48\uff0c\u7b2c\u4e00\u6761\u6307\u4ee4\u5c06\u4f1a\u8df3\u8f6c\u5230\u5168\u5c40\u504f\u79fb\u8868\u4e2d name1\u7684\u5730\u5740\u3002\u521d\u59cb\u65f6\uff0c\u5168\u5c40\u504f\u79fb\u8868\u4e2d\u5305\u542b PLT \u4e2d\u4e0b\u4e00\u6761 pushl\u6307\u4ee4\u7684\u5730\u5740\uff0c\u5e76\u4e0d\u662f name1\u7684\u5b9e\u9645\u5730\u5740\u3002<\/li>\n\n\n\n<li>\u56e0\u6b64\uff0c\u7a0b\u5e8f\u5c06\u4e00\u4e2a\u91cd\u5b9a\u5411\u504f\u79fb\uff08reloc_index\uff09\u538b\u5230\u6808\u4e0a\u3002\u91cd\u5b9a\u4f4d\u504f\u79fb\u662f 32 \u4f4d\u7684\uff0c\u5e76\u4e14\u662f\u975e\u8d1f\u7684\u6570\u503c\u3002\u6b64\u5916\uff0c\u91cd\u5b9a\u4f4d\u8868\u9879\u7684\u7c7b\u578b\u4e3a R_386_JMP_SLOT\uff0c\u5e76\u4e14\u5b83\u5c06\u4f1a\u8bf4\u660e\u5728\u4e4b\u524d jmp \u6307\u4ee4\u4e2d\u4f7f\u7528\u7684\u5168\u5c40\u504f\u79fb\u8868\u9879\u5728 GOT \u8868\u4e2d\u7684\u504f\u79fb\u3002\u91cd\u5b9a\u4f4d\u8868\u9879\u4e5f\u5305\u542b\u4e86\u4e00\u4e2a\u7b26\u53f7\u8868\u7d22\u5f15\uff0c\u56e0\u6b64\u544a\u8bc9\u52a8\u6001\u94fe\u63a5\u5668\u4ec0\u4e48\u7b26\u53f7\u76ee\u524d\u6b63\u5728\u88ab\u5f15\u7528\u3002\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u5c31\u662f name1\u4e86\u3002<\/li>\n\n\n\n<li>\u5728\u538b\u5165\u91cd\u5b9a\u4f4d\u504f\u79fb\u540e\uff0c\u7a0b\u5e8f\u4f1a\u8df3\u8f6c\u5230 .PLT0\uff0c\u8fd9\u662f\u8fc7\u7a0b\u94fe\u63a5\u8868\u7684\u7b2c\u4e00\u4e2a\u8868\u9879\u3002pushl \u6307\u4ee4\u5c06 GOT \u8868\u7684\u7b2c\u4e8c\u4e2a\u8868\u9879(got_plus_4 \u6216\u80054(%ebx)\uff0c<strong>\u5f53\u524dELF\u5bf9\u8c61\u7684\u4fe1\u606f<\/strong>)\u538b\u5230\u6808\u4e0a\uff0c\u7136\u540e\u7ed9\u52a8\u6001\u94fe\u63a5\u5668\u4e00\u4e2a\u8bc6\u522b\u4fe1\u606f\u3002\u6b64\u540e\uff0c\u7a0b\u5e8f\u4f1a\u8df3\u8f6c\u5230\u7b2c\u4e09\u4e2a\u5168\u5c40\u504f\u79fb\u8868\u9879(got_plus_8 \u6216\u80058(%ebx)\uff0c<strong>\u6307\u5411\u52a8\u6001\u88c5\u8f7d\u5668\u4e2d_dl_runtime_resolve\u51fd\u6570\u7684\u6307\u9488<\/strong>) \u5904\uff0c\u8fd9\u5c06\u4f1a\u5c06\u7a0b\u5e8f\u6d41\u4ea4\u7ed9\u52a8\u6001\u94fe\u63a5\u5668\u3002<\/li>\n\n\n\n<li>\u5f53\u52a8\u6001\u94fe\u63a5\u5668\u63a5\u6536\u5230\u63a7\u5236\u6743\u540e\uff0c\u4ed6\u5c06\u4f1a\u8fdb\u884c\u51fa\u6808\u64cd\u4f5c\uff0c\u67e5\u770b\u91cd\u5b9a\u4f4d\u8868\u9879\uff0c\u627e\u5230\u5bf9\u5e94\u7684\u7b26\u53f7\u7684\u503c\uff0c\u5c06 name1 \u7684\u5730\u5740\u5b58\u50a8\u5728\u5168\u5c40\u504f\u79fb\u8868\u9879\u4e2d\uff0c\u7136\u540e\u5c06\u63a7\u5236\u6743\u4ea4\u7ed9\u76ee\u7684\u5730\u5740\u3002<\/li>\n\n\n\n<li>\u8fc7\u7a0b\u94fe\u63a5\u8868\u6267\u884c\u4e4b\u540e\uff0c\u7a0b\u5e8f\u7684\u63a7\u5236\u6743\u5c06\u4f1a\u76f4\u63a5\u4ea4\u7ed9 name1 \u51fd\u6570\uff0c\u800c\u4e14\u6b64\u540e\u518d\u4e5f\u4e0d\u4f1a\u8c03\u7528\u52a8\u6001\u94fe\u63a5\u5668\u6765\u89e3\u6790\u8fd9\u4e2a\u51fd\u6570\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c\u5728 .PLT1 \u5904\u7684 jmp \u6307\u4ee4\u5c06\u4f1a\u76f4\u63a5\u8df3\u8f6c\u5230 name1 \u5904\uff0c\u800c\u4e0d\u662f\u518d\u6b21\u6267\u884c pushl \u6307\u4ee4\u3002<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">\u603b\u4f53\u6d41\u7a0b\u5982\u4e0b\u56fe\u6240\u793a\uff0c\u84dd\u7ebf\u8868\u793a\u9996\u6b21\u6267\u884c\u7684\u6d41\u7a0b\u56fe\uff0c\u7ea2\u7ebf\u8868\u793a\u7b2c\u4e8c\u6b21\u4ee5\u540e\u8c03\u7528\u7684\u6d41\u7a0b\u56fe\uff1a<br><\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/8.210.123.186\/wp-content\/uploads\/2026\/03\/image-15.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"717\" height=\"885\" data-original=\"http:\/\/8.210.123.186\/wp-content\/uploads\/2026\/03\/image-15.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-125\"  sizes=\"auto, (max-width: 717px) 100vw, 717px\" \/><\/div><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><br>LD_BIND_NOW\u73af\u5883\u53d8\u91cf\u53ef\u4ee5\u6539\u53d8\u52a8\u6001\u94fe\u63a5\u5668\u7684\u884c\u4e3a\u3002\u5982\u679c\u5b83\u7684\u503c\u975e\u7a7a\u7684\u8bdd\uff0c\u52a8\u6001\u94fe\u63a5\u5668\u5728\u5c06\u63a7\u5236\u6743\u4ea4\u7ed9\u7a0b\u5e8f\u4e4b\u524d\u4f1a\u6267\u884cPLT\u8868\u9879\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c\u52a8\u6001\u94fe\u63a5\u5668\u5728\u8fdb\u7a0b\u521d\u59cb\u5316\u8fc7\u7a0b\u4e2d\u6267\u884c\u7c7b\u578b\u4e3aR_3862_JMP_SLOT\u7684\u91cd\u5b9a\u4f4d\u8868\u9879\u3002\u5426\u5219\u7684\u8bdd\uff0c\u52a8\u6001\u94fe\u63a5\u8868\u4f1a\u5bf9\u8fc7\u7a0b\u94fe\u63a5\u8868\u9879\u8fdb\u884c\u5ef6\u8fdf\u7ed1\u5b9a\uff0c\u76f4\u5230\u7b2c\u4e00\u6b21\u6267\u884c\u5bf9\u5e94\u7684\u8868\u9879\u65f6\uff0c\u624d\u4f1a\u4eca\u6b21\u90a3\u4e2a\u7b26\u53f7\u89e3\u6790\u4ee5\u53ca\u91cd\u5b9a\u4f4d<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u60f0\u6027\u7ed1\u5b9a<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">\u60f0\u6027\u7ed1\u5b9a\uff08\u5ef6\u8fdf\u7ed1\u5b9a\uff09\u7279\u70b9<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u6838\u5fc3\u4f18\u52bf\uff1a<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u63d0\u9ad8\u542f\u52a8\u6027\u80fd\u5e76\u8282\u7701\u8d44\u6e90\uff1a\u5728\u5927\u578b\u7a0b\u5e8f\u4e2d\uff0c\u5305\u542b\u6210\u767e\u4e0a\u5343\u4e2a\u5916\u90e8\u51fd\u6570\u8c03\u7528\uff0c\u4f46\u5b9e\u9645\u8fd0\u884c\u4e2d\u5f80\u5f80\u53ea\u4f1a\u6267\u884c\u5176\u4e2d\u4e00\u5c0f\u90e8\u5206\u3002\u5982\u679c\u7a0b\u5e8f\u542f\u52a8\u65f6\u5c31\u628a\u6240\u6709\u51fd\u6570\u5168\u90e8\u89e3\u6790\u5e76\u7ed1\u5b9a\u597d\uff0c\u4f1a\u6781\u5176\u8017\u65f6\u3002\u60f0\u6027\u7ed1\u5b9a\uff08\u901a\u8fc7PLT\/GOT\u673a\u5236\uff09\u5141\u8bb8\u201c\u7528\u5230\u54ea\u4e2a\u51fd\u6570\uff0c\u624d\u53bb\u89e3\u6790\u54ea\u4e2a\u51fd\u6570\u201d\uff0c\u4ece\u800c\u5927\u5927\u51cf\u8f7b\u4e86\u52a8\u6001\u94fe\u63a5\u7684\u521d\u59cb\u8d1f\u8f7d\uff0c\u52a0\u5feb\u4e86\u7a0b\u5e8f\u7684\u542f\u52a8\u901f\u5ea6\u3002<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u5b58\u5728\u7684\u9690\u60a3\uff08\u4e0d\u53ef\u9884\u671f\u6027\uff09\uff1a<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u521d\u6b21\u8c03\u7528\u5b58\u5728\u5ef6\u8fdf\uff08\u6027\u80fd\u6296\u52a8\uff09\uff1a\u5f53\u67d0\u4e2a\u51fd\u6570\u88ab<strong>\u7b2c\u4e00\u6b21<\/strong>\u8c03\u7528\u65f6\uff0c\u7cfb\u7edf\u5fc5\u987b\u6302\u8d77\u5f53\u524d\u7684\u4e1a\u52a1\u903b\u8f91\uff0c\u8f6c\u800c\u53bb\u6267\u884c\u590d\u6742\u7684\u7b26\u53f7\u67e5\u627e\u548c\u91cd\u5b9a\u4f4d\u64cd\u4f5c\uff08\u4e5f\u5c31\u662f\u6267\u884c <code>_dl_runtime_resolve<\/code>\uff09\u3002\u8fd9\u4f1a\u5bfc\u81f4\u7b2c\u4e00\u6b21\u8c03\u7528\u7684\u8017\u65f6\u8fdc\u9ad8\u4e8e\u540e\u7eed\u8c03\u7528\uff0c\u5bf9\u4e8e\u5bf9\u5b9e\u65f6\u6027\u8981\u6c42\u6781\u9ad8\uff08\u4e0d\u80fd\u5fcd\u53d7\u5ef6\u8fdf\u6296\u52a8\uff09\u7684\u5e94\u7528\u7a0b\u5e8f\u6765\u8bf4\uff0c\u8fd9\u662f\u4e0d\u53ef\u63a5\u53d7\u7684\u3002<\/li>\n\n\n\n<li>\u8fd0\u884c\u65f6\u5d29\u6e83\u98ce\u9669\uff1a\u5982\u679c\u52a8\u6001\u5e93\u7248\u672c\u4e0d\u5339\u914d\u6216\u67d0\u4e2a\u51fd\u6570\u6839\u672c\u4e0d\u5b58\u5728\uff0c\u5728\u60f0\u6027\u7ed1\u5b9a\u4e0b\uff0c\u7a0b\u5e8f\u542f\u52a8\u65f6\u662f\u65e0\u6cd5\u53d1\u73b0\u7684\u3002\u53ea\u6709\u5f53\u7a0b\u5e8f\u6267\u884c\u5230\u90a3\u4e00\u884c\u4ee3\u7801\uff0c\u8bd5\u56fe\u53bb\u89e3\u6790\u8be5\u7b26\u53f7\u65f6\u624d\u4f1a\u62a5\u9519\uff0c\u5bfc\u81f4\u52a8\u6001\u94fe\u63a5\u5668\u76f4\u63a5\u7ec8\u6b62\u7a0b\u5e8f\uff08Crash\uff09\u3002<\/li>\n\n\n\n<li>\u89e3\u51b3\u65b9\u6848\uff1a\u53ef\u4ee5\u901a\u8fc7\u8bbe\u7f6e\u73af\u5883\u53d8\u91cf <code>LD_BIND_NOW<\/code>\uff08\u6216\u7c7b\u4f3c\u673a\u5236\uff09\u5f3a\u5236\u5173\u95ed\u60f0\u6027\u7ed1\u5b9a\u3002\u8fd9\u6837\u6240\u6709\u51fd\u6570\u5728\u7a0b\u5e8f\u83b7\u53d6\u63a7\u5236\u6743\u4e4b\u524d\uff08\u521d\u59cb\u5316\u9636\u6bb5\uff09\u5c31\u4f1a\u5168\u90e8\u89e3\u6790\u5b8c\u6bd5\uff0c\u867d\u727a\u7272\u4e86\u542f\u52a8\u901f\u5ea6\uff0c\u4f46\u4fdd\u8bc1\u4e86\u8fd0\u884c\u65f6\u7684\u7a33\u5b9a\u6027\u548c\u8017\u65f6\u4e00\u81f4\u6027\u3002<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\"><code>_dl_runtime_resolve<\/code>\u8fc7\u7a0b\u89e3\u91ca<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u5f53\u5f00\u542f\u60f0\u6027\u7ed1\u5b9a\u65f6\uff0c\u7a0b\u5e8f\u7b2c\u4e00\u6b21\u8c03\u7528\u5916\u90e8\u51fd\u6570\u4f1a\u8df3\u5165 PLT \u8868\uff0c\u5e76\u6700\u7ec8\u8c03\u7528\u52a8\u6001\u88c5\u8f7d\u5668\u7684\u6838\u5fc3\u51fd\u6570\uff1a<br><code>_dl_runtime_resolve(link_map_obj, reloc_index)<\/code><br>\u8fd9\u91cc\u7684\u4e24\u4e2a\u53c2\u6570\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>link_map_obj<\/code>\uff1a\u5f53\u524d ELF \u5e93\u7684\u72b6\u6001\u4fe1\u606f\uff08\u4ece GOT[1] \u83b7\u53d6\uff09\u3002<\/li>\n\n\n\n<li><code>reloc_index<\/code>\uff1a\u5f53\u524d\u8c03\u7528\u51fd\u6570\u5bf9\u5e94\u7684\u91cd\u5b9a\u4f4d\u7d22\u5f15\uff08\u7531 PLT \u91cc\u7684 <code>push<\/code> \u6307\u4ee4\u538b\u5165\u6808\u4e2d\u63d0\u4f9b\uff09\u3002<br>\u5728\u8fd9\u4e2a\u51fd\u6570\u5185\u90e8\uff0c\u7cfb\u7edf\uff08\u4ee5 32 \u4f4d\u4e3a\u4f8b\uff09\u6267\u884c\u4e86\u4ee5\u4e0b\u67e5\u8868\u9a8c\u8bc1\u6b65\u9aa4\uff1a<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u5b9a\u4f4d\u91cd\u5b9a\u4f4d\u8868\u9879\uff1a<\/strong><br><code>Elf32_Rel *reloc = JMPREL + index<\/code><br>\u901a\u8fc7\u57fa\u5730\u5740 <code>JMPREL<\/code>\uff08\u8df3\u677f\u91cd\u5b9a\u4f4d\u8868\u8d77\u5740\uff09\u52a0\u4e0a\u504f\u79fb\u91cf\uff0c\u627e\u5230\u5f53\u524d\u51fd\u6570\u5bf9\u5e94\u7684\u90a3\u4e2a\u91cd\u5b9a\u4f4d\u8868\u9879\uff08\u8bb0\u5f55\u4e86\u9700\u8981\u4fee\u6539\u54ea\u91cc\uff0c\u4ee5\u53ca\u7b26\u53f7\u4fe1\u606f\u5728\u54ea\u91cc\uff09\u3002<\/li>\n\n\n\n<li><strong>\u5b9a\u4f4d\u5177\u4f53\u7684\u7b26\u53f7\uff08\u51fd\u6570\uff09\u5b9e\u4f53\uff1a<\/strong><br><code>Elf32_Sym *sym = &amp;SYMTAB[((reloc->r_info)>>8)]<\/code><br>\u4ece\u91cd\u5b9a\u4f4d\u8868\u9879\u7684 <code>r_info<\/code> \u5b57\u6bb5\u9ad8 24 \u4f4d\u4e2d\u63d0\u53d6\u51fa\u7b26\u53f7\u7684\u7d22\u5f15\u53f7\uff0c\u7136\u540e\u53bb <code>.dynsym<\/code>\uff08\u52a8\u6001\u7b26\u53f7\u8868\uff0c\u5373 <code>SYMTAB<\/code>\uff09\u4e2d\u67e5\u627e\u5230\u8be5\u51fd\u6570\u7684\u8be6\u7ec6\u63cf\u8ff0\u7ed3\u6784\u4f53 <code>Elf32_Sym<\/code>\u3002<\/li>\n\n\n\n<li><strong>\u5b89\u5168\u6821\u9a8c\uff08\u9a8c\u8bc1\u91cd\u5b9a\u4f4d\u7c7b\u578b\uff09\uff1a<\/strong><br><code>assert (((reloc->r_info)&amp;0xff) == 0x7 )<\/code><br>\u68c0\u67e5 <code>r_info<\/code> \u7684\u6700\u4f4e\u5b57\u8282\uff0c\u786e\u4fdd\u5b83\u7684\u91cd\u5b9a\u4f4d\u7c7b\u578b\u786e\u5b9e\u662f <code>R_386_JMP_SLOT<\/code>\uff08\u503c\u4e3a 7\uff09\uff0c\u56e0\u4e3a\u53ea\u6709\u8fd9\u4e2a\u7c7b\u578b\u624d\u7528\u4e8e\u5904\u7406 PLT \u7684\u51fd\u6570\u5ef6\u8fdf\u7ed1\u5b9a\u673a\u5236\u3002<\/li>\n\n\n\n<li><strong>\u68c0\u67e5\u7b26\u53f7\u53ef\u89c1\u6027\u4e0e\u89e3\u6790\u72b6\u6001\uff1a<\/strong><br>\u901a\u8fc7\u5224\u65ad\u7b26\u53f7\u7684 <code>st_other<\/code> \u5c5e\u6027\uff0c\u68c0\u67e5\u8fd9\u4e2a\u7b26\u53f7\u662f\u4e0d\u662f\u9690\u85cf\u7684\uff0c\u4ee5\u53ca\u662f\u5426\u5728\u4e4b\u524d\u7684\u6d41\u7a0b\u4e2d\u5df2\u7ecf\u88ab\u89e3\u6790\u8fc7\u4e86\u3002\u5982\u679c\u5df2\u7ecf\u89e3\u6790\u8fc7\uff0c\u5c31\u76f4\u63a5\u8df3\u8fc7\u8017\u65f6\u7684\u67e5\u627e\u6b65\u9aa4\u3002<\/li>\n\n\n\n<li><strong>\u5904\u7406\u7b26\u53f7\u591a\u7248\u672c\uff08Version \u673a\u5236\uff09\uff1a<\/strong><br><code>uint16_t ndx = VERSYM[ (reloc->r_info) >> 8]<\/code><br>\u5728\u73b0\u4ee3 Linux \u4e2d\uff0c\u540c\u4e00\u4e2a\u52a8\u6001\u5e93\u53ef\u80fd\u5b58\u5728\u540c\u540d\u51fd\u6570\u7684\u591a\u4e2a\u7248\u672c\u3002\u7cfb\u7edf\u901a\u8fc7\u67e5\u627e <code>VERSYM<\/code> \u6570\u7ec4\uff0c\u5f97\u5230\u8be5\u7b26\u53f7\u5bf9\u5e94\u7684\u7248\u672c\u53f7\u7d22\u5f15\uff0c\u4ee5\u786e\u4fdd\u540e\u9762\u7ed1\u5b9a\u7684\u662f\u6b63\u786e\u7248\u672c\u7684\u51fd\u6570\u5b9e\u73b0\u3002<\/li>\n\n\n\n<li><strong>\u63d0\u53d6\u5b57\u7b26\u4e32\u540d\u79f0\uff0c\u51c6\u5907\u6700\u7ec8\u7684\u7269\u7406\u5bfb\u5740\uff1a<\/strong><br><code>name = STRTAB + sym->st_name<\/code><br>\u6700\u540e\uff0c\u901a\u8fc7\u7b26\u53f7\u7ed3\u6784\u4f53\u4e2d\u7684 <code>st_name<\/code> \u504f\u79fb\u91cf\uff0c\u53bb\u52a8\u6001\u5b57\u7b26\u4e32\u8868\uff08<code>.dynstr<\/code> \/ <code>STRTAB<\/code>\uff09\u4e2d\u63d0\u53d6\u51fa\u771f\u6b63\u7684\u51fd\u6570\u540d\u5b57\uff08\u6bd4\u5982\u5b57\u7b26\u4e32 <code>\"printf\"<\/code>\uff09\u3002<br>\u62ff\u5230\u540d\u5b57\u548c\u7248\u672c\u53f7\u540e\uff0c\u52a8\u6001\u94fe\u63a5\u5668\u5c31\u4f1a\u53bb\u52a0\u8f7d\u7684\u5171\u4eab\u5e93\uff08<code>.so<\/code>\uff09\u7684\u5185\u5b58\u7a7a\u95f4\u4e2d\u8fdb\u884c\u5b9e\u9645\u7684\u54c8\u5e0c\u67e5\u627e\uff0c\u627e\u5230\u771f\u6b63\u7684\u51fd\u6570\u5185\u5b58\u7269\u7406\/\u865a\u62df\u5730\u5740\uff0c\u5e76\u5c06\u5176\u56de\u586b\u5230\u7a0b\u5e8f\u7684 GOT \u8868\u4e2d\uff0c\u5b8c\u6210\u7ed1\u5b9a\u3002\u540e\u7eed\u7684\u8c03\u7528\u5c31\u4e0d\u518d\u9700\u8981\u7ecf\u5386\u8fd9\u4e2a\u7e41\u7410\u7684\u8fc7\u7a0b\u4e86\u3002<br><strong>\u5f02\u5e38\u5904\u7406\u4e0e\u6808\u56de\u6eaf\u673a\u5236 (.eh_frame \u76f8\u5173)<\/strong><br><strong>.eh_frame<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u8be5\u8282\u533a\u4e3b\u8981\u5b58\u653e\u4e0e\u6808\u56de\u6eaf\uff08Stack Unwinding\uff09\u76f8\u5173\u7684\u8c03\u7528\u5e27\u4fe1\u606f\uff08Call Frame Information, CFI\uff09\u3002<\/li>\n\n\n\n<li>\u5b83\u7684\u6838\u5fc3\u4f5c\u7528\u662f\u652f\u6301\u9ad8\u7ea7\u8bed\u8a00\uff08\u5178\u578b\u7684\u5982 C++\uff09\u7684\u5f02\u5e38\u5904\u7406\u673a\u5236\uff08throw\/catch\uff09\u3002\u5f53\u7a0b\u5e8f\u53d1\u751f\u5f02\u5e38\u9700\u8981\u8df3\u8f6c\u65f6\uff0c\u8fd0\u884c\u65f6\u7cfb\u7edf\u5fc5\u987b\u987a\u7740\u8c03\u7528\u94fe\u9010\u5c42\u5411\u5916\u201c\u5c55\u5f00\u201d\u8c03\u7528\u6808\uff0c\u6062\u590d\u6bcf\u4e00\u5c42\u51fd\u6570\u7684\u5bc4\u5b58\u5668\u72b6\u6001\u548c\u6808\u6307\u9488\uff0c\u53bb\u5bfb\u627e\u80fd\u591f\u5904\u7406\u8be5\u5f02\u5e38\u7684 catch \u5757\u3002\u8fd9\u4e9b\u6307\u5bfc\u7cfb\u7edf\u5982\u4f55\u5b89\u5168\u201c\u9000\u6808\u201d\u7684\u6570\u636e\u5c31\u8bb0\u5f55\u5728\u8fd9\u91cc\u3002<\/li>\n\n\n\n<li>\u5373\u4f7f\u7a0b\u5e8f\u6ca1\u6709\u5f02\u5e38\u5904\u7406\uff0c\u8c03\u8bd5\u5668\uff08\u5982 GDB\uff09\u548c\u6027\u80fd\u8bca\u65ad\u5de5\u5177\u5728\u8ffd\u8e2a\u51fd\u6570\u8c03\u7528\u94fe\uff08\u751f\u6210 Backtrace\uff09\u65f6\uff0c\u4e5f\u5e38\u5e38\u4f9d\u8d56\u6b64\u8282\u533a\u7684\u6570\u636e\u8fdb\u884c\u7cbe\u786e\u5b9a\u4f4d\u3002<\/li>\n\n\n\n<li>\u5728\u5e95\u5c42\u7ed3\u6784\u4e0a\uff0c\u5b83\u7531\u4e00\u7cfb\u5217\u7684 CIE\uff08\u516c\u5171\u4fe1\u606f\u8868\u9879\uff0cCommon Information Entry\uff09\u548c FDE\uff08\u5e27\u63cf\u8ff0\u8868\u9879\uff0cFrame Description Entry\uff09\u7ec4\u6210\u3002\u5176\u4e2d FDE \u8d1f\u8d23\u63cf\u8ff0\u5355\u4e2a\u5177\u4f53\u51fd\u6570\u7684\u6808\u5e27\u89e3\u6790\u89c4\u5219\uff0c\u800c CIE \u5219\u5b58\u653e\u591a\u4e2a FDE \u5171\u4eab\u7684\u57fa\u7840\u89c4\u5219\u4ee5\u8282\u7701\u7a7a\u95f4\u3002<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>.eh_frame_hdr<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u53ef\u4ee5\u5c06\u5176\u7406\u89e3\u4e3a <code>.eh_frame<\/code> \u7684\u5168\u5c40\u7d22\u5f15\u8868\u6216\u52a0\u901f\u76ee\u5f55\u3002<\/li>\n\n\n\n<li>\u7531\u4e8e\u7a0b\u5e8f\u4e2d\u5305\u542b\u6781\u591a\u7684\u51fd\u6570\uff0c<code>.eh_frame<\/code> \u91cc\u4f1a\u5b58\u653e\u6d77\u91cf\u4e14\u957f\u5ea6\u4e0d\u4e00\u7684 FDE \u6570\u636e\u3002\u5982\u679c\u5728\u53d1\u751f\u5f02\u5e38\u65f6\u5bf9\u6574\u4e2a\u8282\u533a\u8fdb\u884c\u7ebf\u6027\u904d\u5386\u67e5\u627e\uff0c\u6027\u80fd\u635f\u8017\u5c06\u975e\u5e38\u5927\u3002<\/li>\n\n\n\n<li>\u4e3a\u4e86\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\uff0c\u94fe\u63a5\u5668\u4f1a\u751f\u6210 <code>.eh_frame_hdr<\/code>\uff0c\u91cc\u9762\u5305\u542b\u4e00\u4e2a\u6839\u636e\u7a0b\u5e8f\u8ba1\u6570\u5668\uff08PC\uff0c\u5373\u4ee3\u7801\u8fd0\u884c\u5730\u5740\uff09\u9884\u5148\u6392\u597d\u5e8f\u7684\u4e8c\u8fdb\u5236\u641c\u7d22\u6811\/\u67e5\u627e\u8868\u3002<\/li>\n\n\n\n<li>\u5f53\u9700\u8981\u6808\u56de\u6eaf\u65f6\uff0c\u8fd0\u884c\u65f6\u7cfb\u7edf\uff08\u5982 libgcc \u6216 libunwind\uff09\u53ef\u4ee5\u76f4\u63a5\u5728\u8fd9\u4e2a\u5934\u90e8\u7d22\u5f15\u4e2d\u901a\u8fc7\u4e8c\u5206\u67e5\u627e\uff0c\u5229\u7528\u5f53\u524d\u6307\u4ee4\u5730\u5740\u6781\u901f\u5b9a\u4f4d\u5230 <code>.eh_frame<\/code> \u4e2d\u5bf9\u5e94\u7684FDE\u7ed3\u6784\uff0c\u4ece\u800c\u5927\u5e45\u63d0\u5347\u5f02\u5e38\u5c55\u5f00\u7684\u6267\u884c\u6548\u7387\u3002<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">\u6307\u4ee4<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">readelf<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u57fa\u672c\u8bed\u6cd5readelf [options] elffile<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>-h\uff1a\u663e\u793aelf header\u4e2d\u7684\u4fe1\u606f<\/li>\n\n\n\n<li>-S\uff1a\u5217\u51fa\u6587\u4ef6\u7684\u6240\u6709\u8282\uff0c\u663e\u793asection headers\u7684\u76f8\u5173\u4fe1\u606f\uff08name\uff0ctype\uff0caddress\u4ee5\u53caoffset\u7b49\uff09<\/li>\n\n\n\n<li>-l\uff1a\u5217\u51fa\u6587\u4ef6\u7684\u7a0b\u5e8f\u5934\u8868\u4ee5\u53ca\u6240\u6709\u6bb5<\/li>\n\n\n\n<li>-s\uff1a\u663e\u793a\u6587\u4ef6\u7684\u7b26\u53f7\u8868\u4fe1\u606f\uff0c\u5305\u62ec\u51fd\u6570\u540d\uff0c\u5168\u5c40\u53d8\u91cf\u7b49\u53ca\u5176\u5730\u5740<\/li>\n\n\n\n<li>-r:\u663e\u793a\u91cd\u5b9a\u4f4d\u4fe1\u606f\uff0c\u6d89\u53ca\u52a8\u6001\u94fe\u63a5\u8fc7\u7a0b<\/li>\n\n\n\n<li>-d\uff1a\u663e\u793a\u52a8\u6001\u6bb5\u7684\u5185\u5bb9\uff0c\u5305\u62ec\u5171\u4eab\u5e93\u4f9d\u8d56\uff0c\u7b26\u53f7\u8868\u4f4d\u7f6e\u7b49<\/li>\n\n\n\n<li>-n\uff1a\u663e\u793a\u6587\u4ef6\u4e2d\u7684\u6ce8\u91ca\u6bb5\u5185\u5bb9<\/li>\n\n\n\n<li>-a\uff1a\u663e\u793a\u6587\u4ef6\u7684\u6240\u6709\u4fe1\u606f<\/li>\n\n\n\n<li>-x \uff1a\u4ee516\u8fdb\u5236\u67e5\u770b\u7279\u5b9a\u8282\u7684\u5185\u5bb9<br>\u66f4\u591a\u4fe1\u606f\u901a\u8fc7man\u67e5\u770breadelf<br>\u95ee\uff1a<br>dll\u52a0\u8f7d\u6b21\u6570\uff0c\u52a8\u6001\u94fe\u63a5\u8fc7\u7a0b\uff0c pltgot\u7ec6\u8282\u8fc7\u7a0b<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u6587\u7ae0\u5b66\u4e60\uff1a<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/ciphersaw.me\/ctf-wiki\/executable\/elf\/elf_structure\/#dynstr\">https:\/\/ciphersaw.me\/ctf-wiki\/executable\/elf\/elf_structure\/#dynstr<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/rqdmap.top\/posts\/elf-structure\">https:\/\/rqdmap.top\/posts\/elf-structure<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>ELF \u6bd4\u8d77PE\uff0cELF\u5206\u4e86section\u7ed9\u7f16\u8bd1\u5668\u548csegment\u7ed9\u52a0\u8f7d\u5668\uff0c\u5904\u7406\u5916\u90e8\u51fd\u6570\u7684\u65f6\u5019\u8c03\u7528\u4e86GOT\/P [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":126,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-117","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-learn"],"_links":{"self":[{"href":"http:\/\/8.210.123.186\/index.php\/wp-json\/wp\/v2\/posts\/117","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/8.210.123.186\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/8.210.123.186\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/8.210.123.186\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/8.210.123.186\/index.php\/wp-json\/wp\/v2\/comments?post=117"}],"version-history":[{"count":1,"href":"http:\/\/8.210.123.186\/index.php\/wp-json\/wp\/v2\/posts\/117\/revisions"}],"predecessor-version":[{"id":127,"href":"http:\/\/8.210.123.186\/index.php\/wp-json\/wp\/v2\/posts\/117\/revisions\/127"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/8.210.123.186\/index.php\/wp-json\/wp\/v2\/media\/126"}],"wp:attachment":[{"href":"http:\/\/8.210.123.186\/index.php\/wp-json\/wp\/v2\/media?parent=117"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/8.210.123.186\/index.php\/wp-json\/wp\/v2\/categories?post=117"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/8.210.123.186\/index.php\/wp-json\/wp\/v2\/tags?post=117"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}