{"id":71889,"date":"2023-12-21T22:35:45","date_gmt":"2023-12-21T14:35:45","guid":{"rendered":"http:\/\/lrxjmw.cn\/?p=71889"},"modified":"2023-12-21T22:35:45","modified_gmt":"2023-12-21T14:35:45","slug":"debugger-principle-information","status":"publish","type":"post","link":"https:\/\/lrxjmw.cn\/debugger-principle-information.html","title":{"rendered":"\u8c03\u8bd5\u5668\u5de5\u4f5c\u539f\u7406\u4e4b\uff08\u4e09\uff09\uff1a\u7814\u7a76\u8c03\u8bd5\u4fe1\u606f"},"content":{"rendered":"<table>\n<tbody>\n<tr>\n<td style=\"padding: 5px 12px; width: 25px; font-size: 22px; text-align: center; background: #E8E8E8; line-height: 30px; color: #999;\">\u5bfc\u8bfb<\/td>\n<td style=\"padding: 10px 10px 12px; line-height: 20px;\"><strong>\u672c\u6587\u5c06\u89e3\u91ca\u8c03\u8bd5\u5668\u662f\u5982\u4f55\u5728\u673a\u5668\u7801\u4e2d\u67e5\u627e\u5b83\u5c06 C \u8bed\u8a00\u6e90\u4ee3\u7801\u8f6c\u6362\u6210\u673a\u5668\u8bed\u8a00\u4ee3\u7801\u65f6\u6240\u9700\u8981\u7684 C \u8bed\u8a00\u51fd\u6570\u3001\u53d8\u91cf\u3001\u4e0e\u6570\u636e\u3002<\/strong><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u8fd9\u662f\u8c03\u8bd5\u5668\u7684\u5de5\u4f5c\u539f\u7406\u7cfb\u5217\u6587\u7ae0\u7684\u7b2c\u4e09\u7bc7\u3002\u9605\u8bfb\u8fd9\u7bc7\u6587\u7ae0\u4e4b\u524d\u5e94\u5f53\u5148\u9605\u8bfb<a href=\"https:\/\/linux.cn\/article-8552-1.html\">\u7b2c\u4e00\u7bc7<\/a>\u4e0e<a href=\"https:\/\/linux.cn\/article-8418-1.html\">\u7b2c\u4e8c\u7bc7<\/a>\u3002<\/p>\n<div   id="j6sjwn9j3u"    style=\"font-size: 14pt; color: white; background-color: black; border-left: red 10px solid; padding-left: 14px; margin-bottom: 20px; margin-top: 20px;\"><strong>\u8c03\u8bd5\u4fe1\u606f<\/strong><\/div>\n<p>\u73b0\u4ee3\u7f16\u8bd1\u5668\u80fd\u591f\u5c06\u6709\u7740\u5404\u79cd\u7f29\u8fdb\u6216\u5d4c\u5957\u7684\u7a0b\u5e8f\u6d41\u7a0b\u3001\u5404\u79cd\u6570\u636e\u7c7b\u578b\u7684\u53d8\u91cf\u7684\u9ad8\u7ea7\u8bed\u8a00\u4ee3\u7801\u8f6c\u6362\u4e3a\u4e00\u5927\u5806\u79f0\u4e4b\u4e3a\u673a\u5668\u7801\u7684 0\/1 \u6570\u636e\uff0c\u8fd9\u4e48\u505a\u7684\u552f\u4e00\u76ee\u7684\u662f\u5c3d\u53ef\u80fd\u5feb\u7684\u5728\u76ee\u6807 CPU \u4e0a\u8fd0\u884c\u7a0b\u5e8f\u3002\u901a\u5e38\u6765\u8bf4\u4e00\u884c C \u8bed\u8a00\u4ee3\u7801\u80fd\u591f\u8f6c\u6362\u4e3a\u82e5\u5e72\u6761\u673a\u5668\u7801\u3002\u53d8\u91cf\u88ab\u5206\u6563\u5728\u673a\u5668\u7801\u4e2d\u7684\u5404\u4e2a\u90e8\u5206\uff0c\u6709\u7684\u5728\u5806\u6808\u4e2d\uff0c\u6709\u7684\u5728\u5bc4\u5b58\u5668\u4e2d\uff0c\u6216\u8005\u76f4\u63a5\u88ab\u4f18\u5316\u6389\u4e86\u3002\u6570\u636e\u7ed3\u6784\u4e0e\u5bf9\u8c61\u5728\u673a\u5668\u7801\u4e2d\u751a\u81f3\u4e0d\u201c\u5b58\u5728\u201d\uff0c\u5b83\u4eec\u53ea\u662f\u7528\u4e8e\u5c06\u6570\u636e\u6309\u4e00\u5b9a\u7684\u7ed3\u6784\u7f16\u7801\u5b58\u50a8\u8fdb\u7f13\u5b58\u3002<\/p>\n<p>\u90a3\u4e48\u8c03\u8bd5\u5668\u600e\u4e48\u77e5\u9053\uff0c\u5f53\u4f60\u9700\u8981\u5728\u67d0\u4e2a\u51fd\u6570\u5165\u53e3\u5904\u6682\u505c\u65f6\uff0c\u7a0b\u5e8f\u8981\u5728\u54ea\u505c\u4e0b\u6765\u5462\uff1f\u5b83\u600e\u4e48\u77e5\u9053\u5f53\u4f60\u67e5\u770b\u67d0\u4e2a\u53d8\u91cf\u503c\u65f6\uff0c\u5b83\u600e\u4e48\u627e\u5230\u8fd9\u4e2a\u503c\uff1f\u7b54\u6848\u662f\uff0c\u8c03\u8bd5\u4fe1\u606f\u3002<\/p>\n<p>\u7f16\u8bd1\u5668\u5728\u751f\u6210\u673a\u5668\u7801\u65f6\u540c\u65f6\u4f1a\u751f\u6210\u76f8\u5e94\u7684\u8c03\u8bd5\u4fe1\u606f\u3002\u8c03\u8bd5\u4fe1\u606f\u4ee3\u8868\u4e86\u53ef\u6267\u884c\u7a0b\u5e8f\u4e0e\u6e90\u4ee3\u7801\u4e4b\u95f4\u7684\u5173\u7cfb\uff0c\u5e76\u4ee5\u4e00\u79cd\u63d0\u524d\u5b9a\u4e49\u597d\u7684\u683c\u5f0f\uff0c\u540c\u673a\u5668\u7801\u5b58\u653e\u5728\u4e00\u8d77\u3002\u8fc7\u53bb\u7684\u6570\u5e74\u91cc\uff0c\u4eba\u4eec\u9488\u5bf9\u4e0d\u540c\u7684\u5e73\u53f0\u4e0e\u53ef\u6267\u884c\u6587\u4ef6\u53d1\u660e\u4e86\u5f88\u591a\u79cd\u7528\u4e8e\u5b58\u50a8\u8fd9\u4e9b\u4fe1\u606f\u7684\u683c\u5f0f\u3002\u4e0d\u8fc7\u6211\u4eec\u8fd9\u7bc7\u6587\u7ae0\u4e0d\u4f1a\u8bb2\u8fd9\u4e9b\u683c\u5f0f\u7684\u5386\u53f2\uff0c\u800c\u662f\u5c06\u9610\u8ff0\u8fd9\u4e9b\u8c03\u8bd5\u4fe1\u606f\u662f\u5982\u4f55\u5de5\u4f5c\u7684\uff0c\u6240\u4ee5\u6211\u4eec\u5c06\u4e13\u6ce8\u4e8e\u4e00\u4e9b\u4e8b\u60c5\uff0c\u6bd4\u5982 DWARF\u3002DWARF \u5982\u4eca\u5341\u5206\u5e7f\u6cdb\u7684\u7528\u4f5c Linux \u548c\u7c7b Unix \u5e73\u53f0\u4e0a\u7684\u53ef\u6267\u884c\u6587\u4ef6\u7684\u8c03\u8bd5\u683c\u5f0f\u3002<\/p>\n<div   id="j6sjwn9j3u"    style=\"font-size: 14pt; color: white; background-color: black; border-left: red 10px solid; padding-left: 14px; margin-bottom: 20px; margin-top: 20px;\"><strong>ELF \u4e2d\u7684 DWARF<\/strong><\/div>\n<p><a href=\"http:\/\/lrxjmw.cn\/wp-content\/uploads\/2017\/06\/dwarf_logo-2.gif\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-85634\" src=\"http:\/\/lrxjmw.cn\/wp-content\/uploads\/2017\/06\/dwarf_logo-2.gif\" alt=\"\" width=\"168\" height=\"227\" \/><\/a><\/p>\n<p>\u6839\u636e<a href=\"http:\/\/en.wikipedia.org\/wiki\/DWARF\">\u5b83\u7684\u7ef4\u57fa\u767e\u79d1<\/a> \u6240\u63cf\u8ff0\uff0c\u867d\u7136 DWARF \u662f\u540c ELF \u4e00\u540c\u8bbe\u8ba1\u7684\uff08DWARF \u662f\u7531 DWARF \u6807\u51c6\u59d4\u5458\u4f1a\u63a8\u51fa\u7684\u5f00\u653e\u6807\u51c6\u3002\u4e0a\u6587\u4e2d\u5c55\u793a\u7684\u56fe\u6807\u5c31\u6765\u81ea\u8fd9\u4e2a\u7f51\u7ad9\u3002\uff09\uff0c\u4f46 DWARF\u5728\u7406\u8bba\u4e0a\u6765\u8bf4\u4e5f\u53ef\u4ee5\u5d4c\u5165\u5230\u5176\u4ed6\u7684\u53ef\u6267\u884c\u6587\u4ef6\u683c\u5f0f\u4e2d\u3002<\/p>\n<p>DWARF \u662f\u4e00\u79cd\u590d\u6742\u7684\u683c\u5f0f\uff0c\u5b83\u5438\u6536\u4e86\u8fc7\u53bb\u8bb8\u591a\u5e74\u5404\u79cd\u4e0d\u540c\u7684\u67b6\u6784\u4e0e\u64cd\u4f5c\u7cfb\u7edf\u7684\u683c\u5f0f\u7684\u7ecf\u9a8c\u3002\u6b63\u662f\u56e0\u4e3a\u5b83\u89e3\u51b3\u4e86\u4e00\u4e2a\u5728\u4efb\u4f55\u5e73\u53f0\u4e0e ABI \uff08\u5e94\u7528\u4e8c\u8fdb\u5236\u63a5\u53e3\uff09\u4e0a\u4e3a\u4efb\u610f\u9ad8\u7ea7\u8bed\u8a00\u4ea7\u751f\u8c03\u8bd5\u4fe1\u606f\u8fd9\u6837\u68d8\u624b\u7684\u96be\u9898\uff0c\u5b83\u4e5f\u5fc5\u987b\u5f88\u590d\u6742\u3002\u60f3\u8981\u900f\u5f7b\u7684\u8bb2\u89e3 DWARF \u4ec5\u4ec5\u662f\u901a\u8fc7\u8fd9\u5355\u8584\u7684\u4e00\u7bc7\u6587\u7ae0\u662f\u8fdc\u8fdc\u4e0d\u591f\u7684\uff0c\u8bf4\u5b9e\u8bdd\u6211\u4e5f\u5e76\u6ca1\u6709\u5145\u5206\u5730\u4e86\u89e3 DWARF \u5230\u6bcf\u4e00\u4e2a\u5fae\u5c0f\u7684\u7ec6\u8282\uff0c\u6240\u4ee5\u6211\u4e5f\u4e0d\u80fd\u5341\u5206\u900f\u5f7b\u7684\u8bb2\u89e3 \uff08\u5982\u679c\u4f60\u611f\u5174\u8da3\u7684\u8bdd\uff0c\u6587\u672b\u6709\u4e00\u4e9b\u80fd\u591f\u5e2e\u52a9\u4f60\u7684\u8d44\u6e90\u3002\u5efa\u8bae\u4ece DWARF \u6559\u7a0b\u5f00\u59cb\u4e0a\u624b\uff09\u3002\u8fd9\u7bc7\u6587\u7ae0\u4e2d\u6211\u5c06\u4ee5\u6d45\u663e\u6613\u61c2\u7684\u65b9\u5f0f\u5c55\u793a DWARF\uff0c\u4ee5\u8bf4\u660e\u8c03\u8bd5\u4fe1\u606f\u662f\u5982\u4f55\u5b9e\u9645\u5de5\u4f5c\u7684\u3002<\/p>\n<div   id="j6sjwn9j3u"    style=\"font-size: 14pt; color: white; background-color: black; border-left: red 10px solid; padding-left: 14px; margin-bottom: 20px; margin-top: 20px;\"><strong>ELF \u6587\u4ef6\u4e2d\u7684\u8c03\u8bd5\u90e8\u5206<\/strong><\/div>\n<p>\u9996\u5148\u8ba9\u6211\u4eec\u770b\u770bDWARF \u5904\u5728 ELF \u6587\u4ef6\u4e2d\u7684\u4ec0\u4e48\u4f4d\u7f6e\u3002ELF&lt; \u5b9a\u4e49\u4e86\u6bcf\u4e00\u4e2a\u751f\u6210\u7684\u76ee\u6807\u6587\u4ef6\u4e2d\u7684\u6bcf\u4e00\u8282\u3002 \u8282\u5934\u8868section header table \u58f0\u660e\u5e76\u5b9a\u4e49\u4e86\u6bcf\u4e00\u8282\u53ca\u5176\u540d\u5b57\u3002\u4e0d\u540c\u7684\u5de5\u5177\u4ee5\u4e0d\u540c\u7684\u65b9\u5f0f\u5904\u7406\u4e0d\u540c\u7684\u8282\uff0c\u4f8b\u5982\u8fde\u63a5\u5668\u4f1a\u5bfb\u627e\u8fde\u63a5\u5668\u9700\u8981\u7684\u90e8\u5206\uff0c\u8c03\u8bd5\u5668\u4f1a\u67e5\u627e\u8c03\u8bd5\u5668\u9700\u8981\u7684\u90e8\u5206\u3002<\/p>\n<p>\u6211\u4eec\u672c\u6587\u7684\u5b9e\u9a8c\u4f1a\u4f7f\u7528\u4ece\u8fd9\u4e2a C \u8bed\u8a00\u6e90\u6587\u4ef6\u6784\u5efa\u7684\u53ef\u6267\u884c\u6587\u4ef6\uff0c\u7f16\u8bd1\u6210 tracedprog2\uff1a<\/p>\n<pre>#include &lt;stdio.h&gt;\r\n\r\nvoid do_stuff(int my_arg)\u3001\r\n{\r\n    int my_local = my_arg + 2;\r\n    int i;\r\n\r\n    for (i = 0; i &lt; my_local; ++i)\r\n        printf(\"i = %d\/n\", i);\r\n}\r\n\r\nint main()\r\n{\r\n    do_stuff(2);\r\n    return 0;\r\n}\r\n<\/pre>\n<p>\u4f7f\u7528 objdump -h \u547d\u4ee4\u68c0\u67e5 ELF \u53ef\u6267\u884c\u6587\u4ef6\u4e2d\u7684<ruby>\u8282\u5934<rt>section header<\/rt><\/ruby>\uff0c\u6211\u4eec\u4f1a\u770b\u5230\u51e0\u4e2a\u4ee5 .debug_ \u5f00\u5934\u7684\u8282\uff0c\u8fd9\u4e9b\u5c31\u662f DWARF \u7684\u8c03\u8bd5\u90e8\u5206\u3002<\/p>\n<pre>26 .debug_aranges 00000020  00000000  00000000  00001037\r\n                 CONTENTS, READONLY, DEBUGGING\r\n27 .debug_pubnames 00000028  00000000  00000000  00001057\r\n                 CONTENTS, READONLY, DEBUGGING\r\n28 .debug_info   000000cc  00000000  00000000  0000107f\r\n                 CONTENTS, READONLY, DEBUGGING\r\n29 .debug_abbrev 0000008a  00000000  00000000  0000114b\r\n                 CONTENTS, READONLY, DEBUGGING\r\n30 .debug_line   0000006b  00000000  00000000  000011d5\r\n                 CONTENTS, READONLY, DEBUGGING\r\n31 .debug_frame  00000044  00000000  00000000  00001240\r\n                 CONTENTS, READONLY, DEBUGGING\r\n32 .debug_str    000000ae  00000000  00000000  00001284\r\n                 CONTENTS, READONLY, DEBUGGING\r\n33 .debug_loc    00000058  00000000  00000000  00001332\r\n                 CONTENTS, READONLY, DEBUGGING\r\n<\/pre>\n<p>\u6bcf\u4e2a\u8282\u7684\u7b2c\u4e00\u4e2a\u6570\u5b57\u4ee3\u8868\u4e86\u8be5\u8282\u7684\u5927\u5c0f\uff0c\u6700\u540e\u4e00\u4e2a\u6570\u5b57\u4ee3\u8868\u4e86\u8fd9\u4e2a\u8282\u5f00\u59cb\u4f4d\u7f6e\u8ddd\u79bb ELF \u7684\u504f\u79fb\u91cf\u3002\u8c03\u8bd5\u5668\u5229\u7528\u8fd9\u4e9b\u4fe1\u606f\u4ece\u53ef\u6267\u884c\u6587\u4ef6\u4e2d\u8bfb\u53d6\u8282\u3002<\/p>\n<p>\u73b0\u5728\u8ba9\u6211\u4eec\u770b\u770b\u4e00\u4e9b\u5728 DWARF \u4e2d\u67e5\u627e\u6709\u7528\u7684\u8c03\u8bd5\u4fe1\u606f\u7684\u5b9e\u9645\u4f8b\u5b50\u3002<\/p>\n<div   id="j6sjwn9j3u"    style=\"font-size: 14pt; color: white; background-color: black; border-left: red 10px solid; padding-left: 14px; margin-bottom: 20px; margin-top: 20px;\"><strong>\u67e5\u627e\u51fd\u6570<\/strong><\/div>\n<p>\u8c03\u8bd5\u5668\u7684\u6700\u57fa\u7840\u7684\u4efb\u52a1\u4e4b\u4e00\uff0c\u5c31\u662f\u5f53\u6211\u4eec\u5728\u67d0\u4e2a\u51fd\u6570\u5904\u8bbe\u7f6e\u65ad\u70b9\u65f6\uff0c\u8c03\u8bd5\u5668\u9700\u8981\u80fd\u591f\u5728\u5165\u53e3\u5904\u6682\u505c\u3002\u4e3a\u6b64\uff0c\u5fc5\u987b\u4e3a\u9ad8\u7ea7\u4ee3\u7801\u4e2d\u7684\u51fd\u6570\u540d\u79f0\u4e0e\u51fd\u6570\u5728\u673a\u5668\u7801\u4e2d\u6307\u4ee4\u5f00\u59cb\u7684\u5730\u5740\u8fd9\u4e24\u8005\u4e4b\u95f4\u5efa\u7acb\u8d77\u67d0\u79cd\u6620\u5c04\u5173\u7cfb\u3002<\/p>\n<p>\u4e3a\u4e86\u83b7\u53d6\u8fd9\u79cd\u6620\u5c04\u5173\u7cfb\uff0c\u6211\u4eec\u53ef\u4ee5\u67e5\u627e DWARF\u4e2d\u7684 .debug_info \u8282\u3002\u5728\u6211\u4eec\u6df1\u5165\u4e4b\u524d\uff0c\u9700\u8981\u4e00\u70b9\u57fa\u7840\u77e5\u8bc6\u3002DWARF \u4e2d\u6bcf\u4e00\u4e2a\u63cf\u8ff0\u7c7b\u578b\u88ab\u79f0\u4e4b\u4e3a\u8c03\u8bd5\u4fe1\u606f\u5165\u53e3\uff08DIE\uff09\u3002\u6bcf\u4e2a DIE \u90fd\u6709\u5173\u4e8e\u5b83\u7684\u7c7b\u578b\u3001\u5c5e\u6027\u4e4b\u7c7b\u7684\u6807\u7b7e\u3002DIE \u4e4b\u95f4\u901a\u8fc7\u5144\u5f1f\u8282\u70b9\u6216\u5b50\u8282\u70b9\u76f8\u4e92\u8fde\u63a5\uff0c\u5c5e\u6027\u7684\u503c\u4e5f\u53ef\u4ee5\u6307\u5411\u5176\u5b83\u7684 DIE\u3002<\/p>\n<p>\u8fd0\u884c\u4ee5\u4e0b\u547d\u4ee4\uff1a<\/p>\n<pre>objdump --dwarf=info tracedprog2\r\n<\/pre>\n<p>\u8f93\u51fa\u6587\u4ef6\u76f8\u5f53\u7684\u957f\uff0c\u4e3a\u4e86\u65b9\u4fbf\u4e3e\u4f8b\u6211\u4eec\u53ea\u5173\u6ce8\u8fd9\u4e9b\u884c\uff08\u4ece\u8fd9\u91cc\u5f00\u59cb\uff0c\u65e0\u7528\u7684\u5197\u957f\u4fe1\u606f\u6211\u4f1a\u4ee5 \uff08...\uff09\u4ee3\u66ff\uff0c\u65b9\u4fbf\u6392\u7248\uff09\uff1a<\/p>\n<pre>&lt;1&gt;&lt;71&gt;: Abbrev Number: 5 (DW_TAG_subprogram)\r\n    &lt;72&gt;   DW_AT_external    : 1\r\n    &lt;73&gt;   DW_AT_name        : (...): do_stuff\r\n    &lt;77&gt;   DW_AT_decl_file   : 1\r\n    &lt;78&gt;   DW_AT_decl_line   : 4\r\n    &lt;79&gt;   DW_AT_prototyped  : 1\r\n    &lt;7a&gt;   DW_AT_low_pc      : 0x8048604\r\n    &lt;7e&gt;   DW_AT_high_pc     : 0x804863e\r\n    &lt;82&gt;   DW_AT_frame_base  : 0x0      (location list)\r\n    &lt;86&gt;   DW_AT_sibling     : &lt;0xb3&gt;\r\n\r\n&lt;1&gt;&lt;b3&gt;: Abbrev Number: 9 (DW_TAG_subprogram)\r\n    &lt;b4&gt;   DW_AT_external    : 1\r\n    &lt;b5&gt;   DW_AT_name        : (...): main\r\n    &lt;b9&gt;   DW_AT_decl_file   : 1\r\n    &lt;ba&gt;   DW_AT_decl_line   : 14\r\n    &lt;bb&gt;   DW_AT_type        : &lt;0x4b&gt;\r\n    &lt;bf&gt;   DW_AT_low_pc      : 0x804863e\r\n    &lt;c3&gt;   DW_AT_high_pc     : 0x804865a\r\n    &lt;c7&gt;   DW_AT_frame_base  : 0x2c     (location list)\r\n<\/pre>\n<p>\u4e0a\u9762\u7684\u4ee3\u7801\u4e2d\u6709\u4e24\u4e2a\u5e26\u6709 DW_TAG_subprogram \u6807\u7b7e\u7684\u5165\u53e3\uff0c\u5728 DWARF \u4e2d\u8fd9\u662f\u5bf9\u51fd\u6570\u7684\u6307\u4ee3\u3002\u6ce8\u610f\uff0c\u8fd9\u662f\u4e24\u4e2a\u8282\u7684\u5165\u53e3\uff0c\u5176\u4e2d\u4e00\u4e2a\u662f do_stuff \u51fd\u6570\u7684\u5165\u53e3\uff0c\u53e6\u4e00\u4e2a\u662f\u4e3b\uff08main\uff09\u51fd\u6570\u7684\u5165\u53e3\u3002\u8fd9\u4e9b\u4fe1\u606f\u4e2d\u6709\u5f88\u591a\u503c\u5f97\u5173\u6ce8\u7684\u5c5e\u6027\uff0c\u4f46\u5176\u4e2d\u6700\u503c\u5f97\u6ce8\u610f\u7684\u662f DW_AT_low_pc\u3002\u5b83\u4ee3\u8868\u4e86\u51fd\u6570\u5f00\u59cb\u5904\u7a0b\u5e8f\u6307\u9488\u7684\u503c\uff08\u5728 x86 \u5e73\u53f0\u4e0a\u662f EIP\uff09\u3002\u6b64\u5904 0x8048604 \u4ee3\u8868\u4e86 do_stuff \u51fd\u6570\u5f00\u59cb\u5904\u7684\u7a0b\u5e8f\u6307\u9488\u3002\u4e0b\u9762\u6211\u4eec\u5c06\u5229\u7528 objdump -d \u547d\u4ee4\u5bf9\u53ef\u6267\u884c\u6587\u4ef6\u8fdb\u884c\u53cd\u6c47\u7f16\u3002\u6765\u770b\u770b\u8fd9\u5757\u5730\u5740\u4e2d\u90fd\u6709\u4ec0\u4e48\uff1a<\/p>\n<pre>08048604 &lt;do_stuff&gt;:\r\n 8048604:       55           push   ebp\r\n 8048605:       89 e5        mov    ebp,esp\r\n 8048607:       83 ec 28     sub    esp,0x28\r\n 804860a:       8b 45 08     mov    eax,DWORD PTR [ebp+0x8]\r\n 804860d:       83 c0 02     add    eax,0x2\r\n 8048610:       89 45 f4     mov    DWORD PTR [ebp-0xc],eax\r\n 8048613:       c7 45 (...)  mov    DWORD PTR [ebp-0x10],0x0\r\n 804861a:       eb 18        jmp    8048634 &lt;do_stuff+0x30&gt;\r\n 804861c:       b8 20 (...)  mov    eax,0x8048720\r\n 8048621:       8b 55 f0     mov    edx,DWORD PTR [ebp-0x10]\r\n 8048624:       89 54 24 04  mov    DWORD PTR [esp+0x4],edx\r\n 8048628:       89 04 24     mov    DWORD PTR [esp],eax\r\n 804862b:       e8 04 (...)  call   8048534 &lt;printf@plt&gt;\r\n 8048630:       83 45 f0 01  add    DWORD PTR [ebp-0x10],0x1\r\n 8048634:       8b 45 f0     mov    eax,DWORD PTR [ebp-0x10]\r\n 8048637:       3b 45 f4     cmp    eax,DWORD PTR [ebp-0xc]\r\n 804863a:       7c e0        jl     804861c &lt;do_stuff+0x18&gt;\r\n 804863c:       c9           leave\r\n 804863d:       c3           ret\r\n<\/pre>\n<p>\u663e\u7136\uff0c0x8048604 \u662f do_stuff \u7684\u5f00\u59cb\u5730\u5740\uff0c\u8fd9\u6837\u4e00\u6765\uff0c\u8c03\u8bd5\u5668\u5c31\u53ef\u4ee5\u5efa\u7acb\u51fd\u6570\u4e0e\u5176\u5728\u53ef\u6267\u884c\u6587\u4ef6\u4e2d\u7684\u4f4d\u7f6e\u95f4\u7684\u6620\u5c04\u5173\u7cfb\u3002<\/p>\n<div   id="j6sjwn9j3u"    style=\"font-size: 14pt; color: white; background-color: black; border-left: red 10px solid; padding-left: 14px; margin-bottom: 20px; margin-top: 20px;\"><strong>\u67e5\u627e\u53d8\u91cf<\/strong><\/div>\n<p>\u5047\u8bbe\u6211\u4eec\u5f53\u524d\u5728 do_staff \u51fd\u6570\u4e2d\u67d0\u4e2a\u4f4d\u7f6e\u4e0a\u8bbe\u7f6e\u65ad\u70b9\u505c\u4e86\u4e0b\u6765\u3002\u6211\u4eec\u60f3\u901a\u8fc7\u8c03\u8bd5\u5668\u53d6\u5f97 my_local \u8fd9\u4e2a\u53d8\u91cf\u7684\u503c\u3002\u8c03\u8bd5\u5668\u600e\u4e48\u77e5\u9053\u5728\u54ea\u91cc\u53bb\u627e\u8fd9\u4e2a\u503c\u5462\uff1f\u5f88\u663e\u7136\u8fd9\u8981\u6bd4\u67e5\u627e\u51fd\u6570\u66f4\u4e3a\u56f0\u96be\u3002\u53d8\u91cf\u53ef\u80fd\u5b58\u50a8\u5728\u5168\u5c40\u5b58\u50a8\u533a\u3001\u5806\u6808\u3001\u751a\u81f3\u662f\u5bc4\u5b58\u5668\u4e2d\u3002\u6b64\u5916\uff0c\u540c\u540d\u53d8\u91cf\u5728\u4e0d\u540c\u7684\u4f5c\u7528\u57df\u4e2d\u53ef\u80fd\u6709\u7740\u4e0d\u540c\u7684\u503c\u3002\u8c03\u8bd5\u4fe1\u606f\u5fc5\u987b\u80fd\u591f\u53cd\u6620\u6240\u6709\u7684\u8fd9\u4e9b\u53d8\u5316\uff0c\u5f53\u7136\uff0cDWARF \u5c31\u80fd\u505a\u5230\u3002<\/p>\n<p>\u6211\u4e0d\u4f1a\u9010\u4e00\u53bb\u5c06\u6bcf\u4e00\u79cd\u53ef\u80fd\u7684\u72b6\u51b5\uff0c\u4f46\u6211\u4f1a\u4ee5\u8c03\u8bd5\u5668\u5728 do_stuff \u51fd\u6570\u4e2d\u67e5\u627e my_local \u53d8\u91cf\u7684\u8fc7\u7a0b\u6765\u4e3e\u4e2a\u4f8b\u5b50\u3002\u4e0b\u9762\u6211\u4eec\u518d\u770b\u4e00\u904d .debug_info \u4e2d do_stuff \u7684\u6bcf\u4e00\u4e2a\u5165\u53e3\uff0c\u8fd9\u6b21\u8fde\u5b83\u7684\u5b50\u5165\u53e3\u4e5f\u8981\u4e00\u8d77\u770b\u3002<\/p>\n<pre>&lt;1&gt;&lt;71&gt;: Abbrev Number: 5 (DW_TAG_subprogram)\r\n    &lt;72&gt;   DW_AT_external    : 1\r\n    &lt;73&gt;   DW_AT_name        : (...): do_stuff\r\n    &lt;77&gt;   DW_AT_decl_file   : 1\r\n    &lt;78&gt;   DW_AT_decl_line   : 4\r\n    &lt;79&gt;   DW_AT_prototyped  : 1\r\n    &lt;7a&gt;   DW_AT_low_pc      : 0x8048604\r\n    &lt;7e&gt;   DW_AT_high_pc     : 0x804863e\r\n    &lt;82&gt;   DW_AT_frame_base  : 0x0      (location list)\r\n    &lt;86&gt;   DW_AT_sibling     : &lt;0xb3&gt;\r\n &lt;2&gt;&lt;8a&gt;: Abbrev Number: 6 (DW_TAG_formal_parameter)\r\n    &lt;8b&gt;   DW_AT_name        : (...): my_arg\r\n    &lt;8f&gt;   DW_AT_decl_file   : 1\r\n    &lt;90&gt;   DW_AT_decl_line   : 4\r\n    &lt;91&gt;   DW_AT_type        : &lt;0x4b&gt;\r\n    &lt;95&gt;   DW_AT_location    : (...)       (DW_OP_fbreg: 0)\r\n &lt;2&gt;&lt;98&gt;: Abbrev Number: 7 (DW_TAG_variable)\r\n    &lt;99&gt;   DW_AT_name        : (...): my_local\r\n    &lt;9d&gt;   DW_AT_decl_file   : 1\r\n    &lt;9e&gt;   DW_AT_decl_line   : 6\r\n    &lt;9f&gt;   DW_AT_type        : &lt;0x4b&gt;\r\n    &lt;a3&gt;   DW_AT_location    : (...)      (DW_OP_fbreg: -20)\r\n&lt;2&gt;&lt;a6&gt;: Abbrev Number: 8 (DW_TAG_variable)\r\n    &lt;a7&gt;   DW_AT_name        : i\r\n    &lt;a9&gt;   DW_AT_decl_file   : 1\r\n    &lt;aa&gt;   DW_AT_decl_line   : 7\r\n    &lt;ab&gt;   DW_AT_type        : &lt;0x4b&gt;\r\n    &lt;af&gt;   DW_AT_location    : (...)      (DW_OP_fbreg: -24)\r\n<\/pre>\n<p>\u770b\u5230\u6bcf\u4e2a\u5165\u53e3\u5904\u7b2c\u4e00\u5bf9\u5c16\u62ec\u53f7\u4e2d\u7684\u6570\u5b57\u4e86\u5417\uff1f\u8fd9\u4e9b\u662f\u5d4c\u5957\u7684\u7b49\u7ea7\uff0c\u5728\u4e0a\u9762\u7684\u4f8b\u5b50\u4e2d\uff0c\u4ee5 &lt;2&gt; \u5f00\u5934\u7684\u5165\u53e3\u662f\u4ee5 &lt;1&gt; \u5f00\u5934\u7684\u5b50\u5165\u53e3\u3002\u56e0\u6b64\u6211\u4eec\u5f97\u77e5 my_local \u53d8\u91cf\uff08\u4ee5 DW_TAG_variable \u6807\u7b7e\u6807\u8bb0\uff09\u662f do_stuff \u51fd\u6570\u7684\u5c40\u90e8\u53d8\u91cf\u3002\u9664\u6b64\u4e4b\u5916\uff0c\u8c03\u8bd5\u5668\u4e5f\u9700\u8981\u77e5\u9053\u53d8\u91cf\u7684\u6570\u636e\u7c7b\u578b\uff0c\u8fd9\u6837\u624d\u80fd\u6b63\u786e\u7684\u4f7f\u7528\u4e0e\u663e\u793a\u53d8\u91cf\u3002\u4e0a\u9762\u7684\u4f8b\u5b50\u4e2d my_local \u7684\u53d8\u91cf\u7c7b\u578b\u6307\u5411\u53e6\u4e00\u4e2a DIE &lt;0x4b&gt;\u3002\u5982\u679c\u4f7f\u7528 objdump \u547d\u4ee4\u67e5\u770b\u8fd9\u4e2a DIE \u7684\u8bdd\uff0c\u6211\u4eec\u4f1a\u53d1\u73b0\u5b83\u662f\u4e00\u4e2a\u6709\u7b26\u53f7 4 \u5b57\u8282\u6574\u578b\u6570\u636e\u3002<\/p>\n<p>\u800c\u4e3a\u4e86\u5728\u5b9e\u9645\u8fd0\u884c\u7684\u7a0b\u5e8f\u5185\u5b58\u4e2d\u67e5\u627e\u53d8\u91cf\u7684\u503c\uff0c\u8c03\u8bd5\u5668\u9700\u8981\u4f7f\u7528\u5230 DW_AT_location \u5c5e\u6027\u3002\u5bf9\u4e8e my_local \u800c\u8a00\uff0c\u662f DW_OP_fbreg: -20\u3002\u8fd9\u4e2a\u4ee3\u7801\u6bb5\u7684\u610f\u601d\u662f\u8bf4 my_local \u5b58\u50a8\u5728\u8ddd\u79bb\u5b83\u6240\u5728\u51fd\u6570\u8d77\u59cb\u5730\u5740\u504f\u79fb\u91cf\u4e3a -20 \u7684\u5730\u65b9\u3002<\/p>\n<p>do_stuff \u51fd\u6570\u7684 DW_AT_frame_base \u5c5e\u6027\u503c\u4e3a 0x0 (location list)\u3002\u8fd9\u610f\u5473\u7740\u8fd9\u4e2a\u5c5e\u6027\u7684\u503c\u9700\u8981\u5728 location list \u4e2d\u67e5\u627e\u3002\u4e0b\u9762\u6211\u4eec\u6765\u4e00\u8d77\u770b\u770b\u3002<\/p>\n<pre>$ objdump --dwarf=loc tracedprog2\r\n\r\ntracedprog2:     file format elf32-i386\r\n\r\nContents of the .debug_loc section:\r\n\r\n    Offset   Begin    End      Expression\r\n    00000000 08048604 08048605 (DW_OP_breg4: 4 )\r\n    00000000 08048605 08048607 (DW_OP_breg4: 8 )\r\n    00000000 08048607 0804863e (DW_OP_breg5: 8 )\r\n    00000000 &lt;End of list&gt;\r\n    0000002c 0804863e 0804863f (DW_OP_breg4: 4 )\r\n    0000002c 0804863f 08048641 (DW_OP_breg4: 8 )\r\n    0000002c 08048641 0804865a (DW_OP_breg5: 8 )\r\n    0000002c &lt;End of list&gt;\r\n<\/pre>\n<p>\u6211\u4eec\u9700\u8981\u5173\u6ce8\u7684\u662f\u7b2c\u4e00\u5217\uff08do_stuff \u51fd\u6570\u7684 DW_AT_frame_base \u5c5e\u6027\u5305\u542b location list \u4e2d 0x0 \u7684\u504f\u79fb\u91cf\u3002\u800c main \u51fd\u6570\u7684\u76f8\u540c\u5c5e\u6027\u5305\u542b 0x2c \u7684\u504f\u79fb\u91cf\uff0c\u8fd9\u4e2a\u504f\u79fb\u91cf\u662f\u7b2c\u4e8c\u5957\u5730\u5740\u5217\u8868\u7684\u504f\u79fb\u91cf\uff09\u3002\u5bf9\u4e8e\u8c03\u8bd5\u5668\u53ef\u80fd\u5b9a\u4f4d\u5230\u7684\u6bcf\u4e00\u4e2a\u5730\u5740\uff0c\u5b83\u90fd\u4f1a\u6307\u5b9a\u5f53\u524d\u6808\u5e27\u5230\u53d8\u91cf\u95f4\u7684\u504f\u79fb\u91cf\uff0c\u800c\u8fd9\u4e2a\u504f\u79fb\u5c31\u662f\u901a\u8fc7\u5bc4\u5b58\u5668\u6765\u8ba1\u7b97\u7684\u3002\u5bf9\u4e8e x86 \u5e73\u53f0\u800c\u8a00\uff0cbpreg4 \u6307\u5411 esp\uff0c\u800c bpreg5 \u6307\u5411 ebp\u3002<\/p>\n<p>\u8ba9\u6211\u4eec\u518d\u770b\u770b do_stuff \u51fd\u6570\u7684\u5934\u51e0\u6761\u6307\u4ee4\u3002<\/p>\n<pre>08048604 &lt;do_stuff&gt;:\r\n 8048604:       55          push   ebp\r\n 8048605:       89 e5       mov    ebp,esp\r\n 8048607:       83 ec 28    sub    esp,0x28\r\n 804860a:       8b 45 08    mov    eax,DWORD PTR [ebp+0x8]\r\n 804860d:       83 c0 02    add    eax,0x2\r\n 8048610:       89 45 f4    mov    DWORD PTR [ebp-0xc],eax\r\n<\/pre>\n<p>\u53ea\u6709\u5f53\u7b2c\u4e8c\u6761\u6307\u4ee4\u6267\u884c\u540e\uff0cebp \u5bc4\u5b58\u5668\u624d\u771f\u6b63\u5b58\u50a8\u4e86\u6709\u7528\u7684\u503c\u3002\u5f53\u7136\uff0c\u524d\u4e24\u6761\u6307\u4ee4\u7684\u57fa\u5740\u662f\u7531\u4e0a\u9762\u6240\u5217\u51fa\u6765\u7684\u5730\u5740\u4fe1\u606f\u8868\u8ba1\u7b97\u51fa\u6765\u7684\u3002\u4e00\u4f46 ebp \u786e\u5b9a\u4e86\uff0c\u8ba1\u7b97\u504f\u79fb\u91cf\u5c31\u5341\u5206\u65b9\u4fbf\u4e86\uff0c\u56e0\u4e3a\u5c3d\u7ba1 esp \u5728\u64cd\u4f5c\u5806\u6808\u7684\u65f6\u5019\u9700\u8981\u79fb\u52a8\uff0c\u4f46 ebp \u4f5c\u4e3a\u6808\u5e95\u5e76\u4e0d\u9700\u8981\u79fb\u52a8\u3002<\/p>\n<p>\u7a76\u7adf\u6211\u4eec\u5e94\u8be5\u53bb\u54ea\u91cc\u627e my_local \u7684\u503c\u5462\uff1f\u5728 0x8048610 \u8fd9\u5757\u5730\u5740\u540e\uff0c my_local \u7684\u503c\u7ecf\u8fc7\u5728 eax \u4e2d\u7684\u8ba1\u7b97\u540e\u88ab\u5b58\u5728\u4e86\u5185\u5b58\u4e2d\uff0c\u4ece\u8fd9\u91cc\u5f00\u59cb\u6211\u4eec\u624d\u9700\u8981\u5173\u6ce8 my_local \u7684\u503c\u3002\u8c03\u8bd5\u5668\u4f1a\u5229\u7528 DW_OP_breg5: 8 \u8fd9\u4e2a\u6808\u5e27\u6765\u67e5\u627e\u3002\u6211\u4eec\u56de\u60f3\u4e0b\uff0cmy_local \u7684 DW_AT_location \u5c5e\u6027\u503c\u4e3a DW_OP_fbreg: -20\u3002\u6240\u4ee5\u5e94\u5f53\u4ece\u57fa\u5740\u4e2d -20 \uff0c\u540c\u65f6\u7531\u4e8e ebp \u5bc4\u5b58\u5668\u9700\u8981 +8\uff0c\u6240\u4ee5\u6700\u7ec8\u7ed3\u679c\u4e3a ebp - 12\u3002\u73b0\u5728\u518d\u6b21\u67e5\u770b\u53cd\u6c47\u7f16\u4ee3\u7801\uff0c\u6765\u770b\u770b\u6570\u636e\u4ece eax \u4e2d\u88ab\u79fb\u52a8\u5230\u54ea\u91cc\u4e86\u3002\u5f53\u7136\uff0c\u8fd9\u91cc my_local \u5e94\u5f53\u88ab\u5b58\u50a8\u5728\u4e86 ebp - 12 \u7684\u5730\u5740\u4e2d\u3002<\/p>\n<div   id="j6sjwn9j3u"    style=\"font-size: 14pt; color: white; background-color: black; border-left: red 10px solid; padding-left: 14px; margin-bottom: 20px; margin-top: 20px;\"><strong>\u67e5\u770b\u884c\u53f7<\/strong><\/div>\n<p>\u5f53\u6211\u4eec\u8c08\u5230\u5728\u8c03\u8bd5\u4fe1\u606f\u5bfb\u627e\u51fd\u6570\u7684\u65f6\u5019\uff0c\u6211\u4eec\u5229\u7528\u4e86\u4e9b\u6280\u5de7\u3002\u5f53\u8c03\u8bd5 C \u8bed\u8a00\u6e90\u4ee3\u7801\u5e76\u5728\u67d0\u4e2a\u51fd\u6570\u51fa\u653e\u7f6e\u65ad\u70b9\u7684\u65f6\u5019\uff0c\u6211\u4eec\u5e76\u4e0d\u5173\u6ce8\u7b2c\u4e00\u6761\u201c\u673a\u5668\u7801\u201d\u6307\u4ee4\uff08\u51fd\u6570\u7684\u8c03\u7528\u51c6\u5907\u5de5\u4f5c\u5df2\u7ecf\u5b8c\u6210\u800c\u5c40\u90e8\u53d8\u91cf\u8fd8\u6ca1\u6709\u521d\u59cb\u5316\uff09\u3002\u6211\u4eec\u771f\u6b63\u5173\u6ce8\u7684\u662f\u51fd\u6570\u7684\u7b2c\u4e00\u884c\u201cC \u4ee3\u7801\u201d\u3002<\/p>\n<p>\u8fd9\u5c31\u662f DWARF \u5b8c\u5168\u8986\u76d6\u6620\u5c04 C \u6e90\u4ee3\u7801\u4e2d\u7684\u884c\u4e0e\u53ef\u6267\u884c\u6587\u4ef6\u4e2d\u673a\u5668\u7801\u5730\u5740\u7684\u539f\u56e0\u3002\u4e0b\u9762\u662f .debug_line \u8282\u4e2d\u6240\u5305\u542b\u7684\u5185\u5bb9\uff0c\u6211\u4eec\u5c06\u5176\u8f6c\u6362\u4e3a\u53ef\u8bfb\u7684\u683c\u5f0f\u5c55\u793a\u5982\u4e0b\u3002<\/p>\n<pre>$ objdump --dwarf=decodedline tracedprog2\r\n\r\ntracedprog2:     file format elf32-i386\r\n\r\nDecoded dump of debug contents of section .debug_line:\r\n\r\nCU: \/home\/eliben\/eli\/eliben-code\/debugger\/tracedprog2.c:\r\nFile name           Line number    Starting address\r\ntracedprog2.c                5           0x8048604\r\ntracedprog2.c                6           0x804860a\r\ntracedprog2.c                9           0x8048613\r\ntracedprog2.c               10           0x804861c\r\ntracedprog2.c                9           0x8048630\r\ntracedprog2.c               11           0x804863c\r\ntracedprog2.c               15           0x804863e\r\ntracedprog2.c               16           0x8048647\r\ntracedprog2.c               17           0x8048653\r\ntracedprog2.c               18           0x8048658\r\n<\/pre>\n<p>\u5f88\u5bb9\u6613\u5c31\u53ef\u4ee5\u770b\u51fa\u5176\u4e2d C \u6e90\u4ee3\u7801\u4e0e\u53cd\u6c47\u7f16\u4ee3\u7801\u4e4b\u95f4\u7684\u5bf9\u5e94\u5173\u7cfb\u3002\u7b2c 5 \u884c\u6307\u5411do_stuff \u51fd\u6570\u7684\u5165\u53e3\uff0c0x8040604\u3002\u7b2c 6 \u884c\uff0c\u6307\u5411 0x804860a \uff0c\u6b63\u662f\u8c03\u8bd5\u5668\u5728\u8c03\u8bd5 do_stuff \u51fd\u6570\u65f6\u9700\u8981\u505c\u4e0b\u6765\u7684\u5730\u65b9\u3002\u8fd9\u91cc\u5df2\u7ecf\u5b8c\u6210\u4e86\u51fd\u6570\u8c03\u7528\u7684\u51c6\u5907\u5de5\u4f5c\u3002\u4e0a\u9762\u7684\u8fd9\u4e9b\u4fe1\u606f\u5f62\u6210\u4e86\u884c\u53f7\u4e0e\u5730\u5740\u95f4\u7684\u53cc\u5411\u6620\u5c04\u5173\u7cfb\u3002<\/p>\n<ul>\n<li>\u5f53\u5728\u67d0\u4e00\u884c\u8bbe\u7f6e\u65ad\u70b9\u7684\u65f6\u5019\uff0c\u8c03\u8bd5\u5668\u4f1a\u5229\u7528\u8fd9\u4e9b\u4fe1\u606f\u53bb\u67e5\u627e\u76f8\u5e94\u7684\u5730\u5740\u6765\u505a\u65ad\u70b9\u5de5\u4f5c\uff08\u8fd8\u8bb0\u5f97\u4e0a\u7bc7\u6587\u7ae0\u4e2d\u7684 int 3 \u6307\u4ee4\u5417\uff1f\uff09<\/li>\n<li>\u5f53\u6307\u4ee4\u9020\u6210\u6bb5\u9519\u8bef\u65f6\uff0c\u8c03\u8bd5\u5668\u4f1a\u5229\u7528\u8fd9\u4e9b\u4fe1\u606f\u6765\u67e5\u770b\u6e90\u4ee3\u7801\u4e2d\u53d1\u751f\u95ee\u9898\u7684\u884c\u3002<\/li>\n<\/ul>\n<div   id="j6sjwn9j3u"    style=\"font-size: 14pt; color: white; background-color: black; border-left: red 10px solid; padding-left: 14px; margin-bottom: 20px; margin-top: 20px;\"><strong>libdwarf - \u7528 DWARF \u7f16\u7a0b<\/strong><\/div>\n<p>\u5c3d\u7ba1\u4f7f\u7528\u547d\u4ee4\u884c\u5de5\u5177\u6765\u83b7\u5f97 DWARF \u5f88\u6709\u7528\uff0c\u4f46\u8fd9\u4ecd\u7136\u4e0d\u591f\u6613\u7528\u3002\u4f5c\u4e3a\u7a0b\u5e8f\u5458\uff0c\u6211\u4eec\u5e0c\u671b\u77e5\u9053\u5f53\u6211\u4eec\u9700\u8981\u8fd9\u4e9b\u8c03\u8bd5\u4fe1\u606f\u65f6\u5e94\u5f53\u600e\u4e48\u7f16\u7a0b\u6765\u83b7\u53d6\u8fd9\u4e9b\u4fe1\u606f\u3002<\/p>\n<p>\u81ea\u7136\u6211\u4eec\u60f3\u5230\u7684\u7b2c\u4e00\u79cd\u65b9\u6cd5\u5c31\u662f\u9605\u8bfb DWARF \u89c4\u8303\u5e76\u6309\u89c4\u8303\u64cd\u4f5c\u9605\u8bfb\u4f7f\u7528\u3002\u6709\u53e5\u8bdd\u8bf4\u7684\u597d\uff0c\u5206\u6790 HTML \u5e94\u5f53\u4f7f\u7528\u5e93\u51fd\u6570\uff0c\u6c38\u8fdc\u4e0d\u8981\u624b\u5de5\u5206\u6790\u3002\u5bf9\u4e8e DWARF \u6765\u8bf4\u6b63\u662f\u5982\u6b64\u3002DWARF \u6bd4 HTML \u8981\u590d\u6742\u5f97\u591a\u3002\u4e0a\u9762\u6240\u5c55\u793a\u51fa\u6765\u7684\u53ea\u662f\u51b0\u5c71\u4e00\u89d2\u3002\u66f4\u7cdf\u7cd5\u7684\u662f\uff0c\u5728\u5b9e\u9645\u7684\u76ee\u6807\u6587\u4ef6\u4e2d\uff0c\u5927\u90e8\u5206\u4fe1\u606f\u662f\u4ee5\u975e\u5e38\u7d27\u51d1\u7684\u538b\u7f29\u683c\u5f0f\u5b58\u50a8\u7684\uff0c\u5206\u6790\u8d77\u6765\u66f4\u52a0\u590d\u6742\uff08\u4fe1\u606f\u4e2d\u7684\u67d0\u4e9b\u90e8\u5206\uff0c\u4f8b\u5982\u4f4d\u7f6e\u4fe1\u606f\u4e0e\u884c\u53f7\u4fe1\u606f\uff0c\u5728\u67d0\u4e9b\u865a\u62df\u673a\u4e0b\u662f\u4ee5\u6307\u4ee4\u7684\u65b9\u5f0f\u7f16\u7801\u7684\uff09\u3002<\/p>\n<p>\u6240\u4ee5\u6211\u4eec\u8981\u4f7f\u7528\u5e93\u6765\u5904\u7406 DWARF\u3002\u4e0b\u9762\u662f\u4e24\u79cd\u6211\u719f\u6089\u7684\u4e3b\u8981\u7684\u5e93\uff08\u8fd8\u6709\u4e9b\u4e0d\u5b8c\u6574\u7684\u5e93\u8fd9\u91cc\u6ca1\u6709\u5199\uff09<\/p>\n<ol>\n<li>BFD \uff08libbfd\uff09\uff0c\u5305\u542b\u4e86 objdump \uff08\u5bf9\uff0c\u5c31\u662f\u8fd9\u7bc7\u6587\u7ae0\u4e2d\u6211\u4eec\u4e00\u76f4\u5728\u7528\u7684\u8fd9\u8d27\uff09\uff0cld\uff08GNU \u8fde\u63a5\u5668\uff09\u4e0e as\uff08GNU \u7f16\u8bd1\u5668\uff09\u3002BFD \u4e3b\u8981\u7528\u4e8e <a href=\"http:\/\/www.gnu.org\/software\/binutils\/\">GNU binutils<\/a>\u3002<\/li>\n<li>libdwarf \uff0c\u540c\u5b83\u7684\u54e5\u54e5 libelf \u4e00\u540c\u7528\u4e8e Solaris \u4e0e FreeBSD \u4e2d\u7684\u8c03\u8bd5\u4fe1\u606f\u5206\u6790\u3002<\/li>\n<\/ol>\n<p>\u76f8\u6bd4\u8f83\u800c\u8a00\u6211\u66f4\u503e\u5411\u4e8e\u4f7f\u7528 libdwarf\uff0c\u56e0\u4e3a\u6211\u5bf9\u5b83\u4e86\u89e3\u7684\u66f4\u591a\uff0c\u5e76\u4e14 libdwarf \u7684\u5f00\u6e90\u534f\u8bae\u66f4\u5f00\u653e\uff08LGPL \u5bf9\u6bd4 GPL\uff09\u3002<\/p>\n<p>\u56e0\u4e3a libdwarf \u672c\u8eab\u76f8\u5f53\u590d\u6742\uff0c\u64cd\u4f5c\u8d77\u6765\u9700\u8981\u76f8\u5f53\u591a\u7684\u4ee3\u7801\uff0c\u6240\u4ee5\u6211\u5728\u8fd9\u4e0d\u4f1a\u5c55\u793a\u6240\u6709\u4ee3\u7801\u3002\u4f60\u53ef\u4ee5\u5728 <a href=\"https:\/\/github.com\/eliben\/code-for-blog\/blob\/master\/2011\/dwarf_get_func_addr.c\">\u8fd9\u91cc<\/a> \u4e0b\u8f7d\u4ee3\u7801\u5e76\u8fd0\u884c\u8bd5\u8bd5\u3002\u8fd0\u884c\u8fd9\u4e9b\u4ee3\u7801\u9700\u8981\u63d0\u524d\u5b89\u88c5 libelfand \u4e0e libdwarf \uff0c\u540c\u65f6\u5728\u4f7f\u7528\u8fde\u63a5\u5668\u7684\u65f6\u5019\u8981\u4f7f\u7528\u53c2\u6570 -lelf \u4e0e -ldwarf\u3002<\/p>\n<p>\u8fd9\u4e2a\u793a\u4f8b\u7a0b\u5e8f\u53ef\u4ee5\u63a5\u53d7\u53ef\u6267\u884c\u6587\u4ef6\u5e76\u6253\u5370\u5176\u4e2d\u7684\u51fd\u6570\u540d\u79f0\u4e0e\u51fd\u6570\u5165\u53e3\u5730\u5740\u3002\u4e0b\u9762\u662f\u6211\u4eec\u6574\u7bc7\u6587\u7ae0\u4e2d\u4f7f\u7528\u7684 C \u7a0b\u5e8f\u7ecf\u8fc7\u793a\u4f8b\u7a0b\u5e8f\u5904\u7406\u540e\u7684\u8f93\u51fa\u3002<\/p>\n<pre>$ dwarf_get_func_addr tracedprog2\r\nDW_TAG_subprogram: 'do_stuff'\r\nlow pc  : 0x08048604\r\nhigh pc : 0x0804863e\r\nDW_TAG_subprogram: 'main'\r\nlow pc  : 0x0804863e\r\nhigh pc : 0x0804865a\r\n<\/pre>\n<p>libdwarf \u7684\u6587\u6863\u5f88\u68d2\uff0c\u5982\u679c\u4f60\u82b1\u4e9b\u529f\u592b\uff0c\u5229\u7528 libdwarf \u83b7\u5f97\u8fd9\u7bc7\u6587\u7ae0\u4e2d\u6240\u6d89\u53ca\u5230\u7684 DWARF \u4fe1\u606f\u5e94\u8be5\u5e76\u4e0d\u56f0\u96be\u3002<\/p>\n<div   id="j6sjwn9j3u"    style=\"font-size: 14pt; color: white; background-color: black; border-left: red 10px solid; padding-left: 14px; margin-bottom: 20px; margin-top: 20px;\"><strong>\u7ed3\u8bba\u4e0e\u8ba1\u5212<\/strong><\/div>\n<p>\u539f\u7406\u4e0a\u8bb2\uff0c\u8c03\u8bd5\u4fe1\u606f\u662f\u4e2a\u5f88\u7b80\u5355\u7684\u6982\u5ff5\u3002\u5c3d\u7ba1\u5b9e\u73b0\u7ec6\u8282\u53ef\u80fd\u6bd4\u8f83\u590d\u6742\uff0c\u4f46\u7ecf\u8fc7\u4e86\u4e0a\u9762\u7684\u5b66\u4e60\u6211\u60f3\u4f60\u5e94\u8be5\u4e86\u89e3\u4e86\u8c03\u8bd5\u5668\u662f\u5982\u4f55\u4ece\u53ef\u6267\u884c\u6587\u4ef6\u4e2d\u83b7\u53d6\u5b83\u9700\u8981\u7684\u6e90\u4ee3\u7801\u4fe1\u606f\u7684\u4e86\u3002\u5bf9\u4e8e\u7a0b\u5e8f\u5458\u800c\u8a00\uff0c\u7a0b\u5e8f\u53ea\u662f\u4ee3\u7801\u6bb5\u4e0e\u6570\u636e\u7ed3\u6784\uff1b\u5bf9\u53ef\u6267\u884c\u6587\u4ef6\u800c\u8a00\uff0c\u7a0b\u5e8f\u53ea\u662f\u4e00\u7cfb\u5217\u5b58\u50a8\u5728\u5185\u5b58\u6216\u5bc4\u5b58\u5668\u4e2d\u7684\u6307\u4ee4\u6216\u6570\u636e\u3002\u4f46\u5229\u7528\u8c03\u8bd5\u4fe1\u606f\uff0c\u8c03\u8bd5\u5668\u5c31\u53ef\u4ee5\u5c06\u8fd9\u4e24\u8005\u8fde\u63a5\u8d77\u6765\uff0c\u4ece\u800c\u5b8c\u6210\u8c03\u8bd5\u5de5\u4f5c\u3002<\/p>\n<p>\u6b64\u6587\u4e0e\u8fd9\u7cfb\u5217\u7684\u524d\u4e24\u7bc7\uff0c\u4e00\u540c\u4ecb\u7ecd\u4e86\u8c03\u8bd5\u5668\u7684\u5185\u90e8\u5de5\u4f5c\u8fc7\u7a0b\u3002\u5229\u7528\u8fd9\u91cc\u6240\u8bb2\u5230\u7684\u77e5\u8bc6\uff0c\u518d\u6572\u4e9b\u4ee3\u7801\uff0c\u5e94\u8be5\u53ef\u4ee5\u5b8c\u6210\u4e00\u4e2a Linux \u4e2d\u6700\u7b80\u5355\u3001\u57fa\u7840\u4f46\u4e5f\u6709\u4e00\u5b9a\u529f\u80fd\u7684\u8c03\u8bd5\u5668\u3002<\/p>\n<p>\u4e0b\u4e00\u6b65\u6211\u5e76\u4e0d\u786e\u5b9a\u8981\u505a\u4ec0\u4e48\uff0c\u8fd9\u4e2a\u7cfb\u5217\u6587\u7ae0\u53ef\u80fd\u5c31\u6b64\u7ed3\u675f\uff0c\u4e5f\u6709\u53ef\u80fd\u6211\u8981\u8bb2\u4e9b\u5806\u6808\u8c03\u7528\u7684\u4e8b\u60c5\uff0c\u53c8\u6216\u8005\u8bb2 Windows \u4e0b\u7684\u8c03\u8bd5\u3002\u4f60\u4eec\u6709\u4ec0\u4e48\u597d\u7684\u70b9\u5b50\u6216\u8005\u76f8\u5173\u6750\u6599\uff0c\u53ef\u4ee5\u76f4\u63a5\u8bc4\u8bba\u6216\u8005\u53d1\u90ae\u4ef6\u7ed9\u6211\u3002<\/p>\n<div   id="j6sjwn9j3u"    style=\"font-size: 14pt; color: white; background-color: black; border-left: red 10px solid; padding-left: 14px; margin-bottom: 20px; margin-top: 20px;\"><strong>\u53c2\u8003<\/strong><\/div>\n<ul>\n<li>objdump \u53c2\u8003\u624b\u518c<\/li>\n<li><a href=\"http:\/\/en.wikipedia.org\/wiki\/Executable_and_Linkable_Format\">ELF<\/a> \u4e0e <a href=\"http:\/\/en.wikipedia.org\/wiki\/DWARF\">DWARF<\/a> \u7684\u7ef4\u57fa\u767e\u79d1<\/li>\n<li><a href=\"http:\/\/dwarfstd.org\/\">Dwarf Debugging Standard \u4e3b\u9875<\/a>\uff0c\u8fd9\u91cc\u6709\u5f88\u68d2\u7684 DWARF \u6559\u7a0b\u4e0e DWARF \u6807\u51c6\uff0c\u4f5c\u8005\u662f Michael Eager\u3002\u7b2c\u4e8c\u7248\u57fa\u4e8e GCC \u4e5f\u8bb8\u66f4\u80fd\u5438\u5f15\u4f60\u3002<\/li>\n<li><a href=\"http:\/\/reality.sgiweb.org\/davea\/dwarf.html\">libdwarf \u4e3b\u9875<\/a>\uff0c\u8fd9\u91cc\u53ef\u4ee5\u4e0b\u8f7d\u5230 libwarf \u7684\u5b8c\u6574\u5e93\u4e0e\u53c2\u8003\u624b\u518c<\/li>\n<li><a href=\"http:\/\/sourceware.org\/binutils\/docs-2.21\/bfd\/index.html\">BFD \u6587\u6863<\/a><\/li>\n<\/ul>\n<hr \/>\n<hr \/>\n<p>via: <a href=\"http:\/\/eli.thegreenplace.net\/2011\/02\/07\/how-debuggers-work-part-3-debugging-information\">http:\/\/eli.thegreenplace.net\/2011\/02\/07\/how-debuggers-work-part-3-debugging-information<\/a><\/p>\n<p>\u4f5c\u8005\uff1a<a href=\"http:\/\/eli.thegreenplace.net\/\">Eli Bendersky<\/a> \u8bd1\u8005\uff1a<a href=\"https:\/\/github.com\/YYforymj\">YYforymj<\/a> \u6821\u5bf9\uff1a<a href=\"https:\/\/github.com\/wxy\">wxy<\/a><\/p>\n<p>\u672c\u6587\u7531 <a href=\"https:\/\/github.com\/LCTT\/TranslateProject\">LCTT<\/a> \u539f\u521b\u7f16\u8bd1\uff0c<a href=\"https:\/\/linux.cn\/\">Linux\u4e2d\u56fd<\/a> \u8363\u8a89\u63a8\u51fa<\/p>\n<blockquote>\n<p style=\"text-align: left; color: #88a6a4;\">\u539f\u6587\u6765\u81ea\uff1a<a href=\"https:\/\/linux.cn\/article-8579-1.html\" target=\"_blank\" rel=\"noopener\">https:\/\/linux.cn\/article-8579-1.html<\/a><\/p>\n<p style=\"text-align: left; color: #88a6a4;\">\u672c\u6587\u5730\u5740\uff1a<a href=\"http:\/\/lrxjmw.cn\/debugger-principle-information.html\" target=\"_blank\" rel=\"noopener\">http:\/\/lrxjmw.cn\/debugger-principle-information.html<\/a><span style=\"float: right;\">\u7f16\u8f91\u5458\uff1a\u534e\u4e16\u53d1\uff0c\u5ba1\u6838\u5458\uff1a\u9004\u589e\u5b9d<\/span><\/p>\n<\/blockquote>\n","protected":false},"excerpt":{"rendered":"<p>\u8fd9\u662f\u8c03\u8bd5\u5668\u7684\u5de5\u4f5c\u539f\u7406\u7cfb\u5217\u6587\u7ae0\u7684\u7b2c\u4e09\u7bc7\u3002\u9605\u8bfb\u8fd9\u7bc7\u6587\u7ae0\u4e4b\u524d\u5e94\u5f53\u5148\u9605\u8bfb\u7b2c\u4e00\u7bc7\u4e0e\u7b2c\u4e8c\u7bc7\u3002<\/p>\n","protected":false},"author":63,"featured_media":85635,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[55],"tags":[],"class_list":["post-71889","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-thread"],"acf":[],"_links":{"self":[{"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/posts\/71889","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/users\/63"}],"replies":[{"embeddable":true,"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/comments?post=71889"}],"version-history":[{"count":5,"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/posts\/71889\/revisions"}],"predecessor-version":[{"id":85679,"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/posts\/71889\/revisions\/85679"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/media\/85635"}],"wp:attachment":[{"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/media?parent=71889"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/categories?post=71889"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/tags?post=71889"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}