{"id":1061,"date":"2022-03-01T22:46:44","date_gmt":"2022-03-01T14:46:44","guid":{"rendered":"https:\/\/www.xianwaizhiyin.net\/?p=1061"},"modified":"2022-06-11T02:34:10","modified_gmt":"2022-06-10T18:34:10","slug":"x86%e6%b1%87%e7%bc%96%e5%85%a5%e9%97%a8-%e4%bc%a0%e5%8f%82","status":"publish","type":"post","link":"https:\/\/www.xianwaizhiyin.net\/?p=1061","title":{"rendered":"X86\u6c47\u7f16\u5165\u95e8-\u4f20\u53c2"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">\u51fd\u6570\u4f20\u53c2\uff0c\u4e3b\u6d41 \u6709\u4e24\u79cd\u6280\u672f\u65b9\u5f0f \u5b9e\u73b0\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">1\uff0c\u5806\u6808\u4f20\u53c2\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">2\uff0c\u5bc4\u5b58\u5668\u4f20\u53c2\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5806\u6808\u4f20\u53c2 \u7684\u5b9e\u73b0\u6bd4\u8f83\u7b80\u5355\uff0c\u4e0d\u5bb9\u6613\u51fa\u9519\uff0c\u6240\u4ee5\u5e94\u7528\u6bd4\u8f83\u5e7f\u6cdb\u3002\u5bc4\u5b58\u5668\u4f20\u53c2 \u901f\u5ea6\u5feb\uff0c\u6027\u80fd\u597d\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u65e2\u7136 \u5bc4\u5b58\u5668\u4f20\u53c2 \u7684\u65b9\u5f0f\u90a3\u4e48\u597d\uff0c\u9ad8\u7ea7\u8bed\u8a00\u4e3a\u4ec0\u4e48\u4e0d\u5168\u90e8\u90fd\u7528 \u5bc4\u5b58\u5668\u4f20\u53c2 \u5b9e\u73b0\u4e00\u4e9b\u529f\u80fd\uff0c\u5f00\u53d1\u96be\u5ea6\u662f\u4e00\u4e2a\u9700\u8981\u8003\u91cf\u7684\u56e0\u7d20\uff0c\u4e0d\u662f\u54ea\u4e2a\u6027\u80fd\u597d\u5c31\u7528\u54ea\u4e2a\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5373\u4f7f\u6027\u80fd\u597d\uff0c\u5199\u51fa\u6765\u7684\u4e1c\u897f\u4e00\u5806bug\u600e\u4e48\u529e\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6240\u4ee5\u5728 <code class=\"prettyprint\" >JAVA<\/code> \u91cc\u9762\u4f7f\u7528\u7684\u662f\u5806\u6808\u4f20\u53c2\uff0c\u800c <code>C\/C++<\/code> \u8bed\u8a00\u5728 \u53c2\u6570\u4e0d\u591a\uff0c \u5bc4\u5b58\u5668\u8db3\u591f\u7684\u60c5\u51b5\u4e0b\uff0c\u4f1a\u4f18\u9009\u4f7f\u7528\u5bc4\u5b58\u5668\u4f20\u53c2\uff0c\u4e0d\u591f\u518d\u4f7f\u7528\u5806\u6808\u4f20\u53c2\u3002\u8fd9\u4e5f\u662f <code>C\/C++<\/code> \u6bd4 <code>JAVA<\/code> \u6027\u80fd\u597d\u7684\u539f\u56e0\u4e4b\u4e00\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"917\" height=\"410\" src=\"https:\/\/www.xianwaizhiyin.net\/wp-content\/uploads\/2022\/03\/jvm-sp.png\" alt=\"\" class=\"wp-image-1216\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u9ad8\u7ea7\u8bed\u8a00\u4e2d\uff0c\u6709\u4e9b\u8bed\u8a00\u4e5f\u4f1a\u5728\u67d0\u4e9b\u5730\u65b9\u91c7\u7528 <strong>\u5bc4\u5b58\u5668\u4f20\u53c2<\/strong> \u6765\u4ee3\u66ff <strong>\u5806\u6808\u4f20\u53c2<\/strong>\uff0c\u4f8b\u5982 PHP \u7684 <code class=\"prettyprint\" >execute_data<\/code>\uff0c<code>opline<\/code>\uff0c\u5982\u4e0b\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1080\" height=\"795\" src=\"https:\/\/www.xianwaizhiyin.net\/wp-content\/uploads\/2022\/03\/php-canshu.jpg\" alt=\"\" class=\"wp-image-1072\"\/><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-css-opacity\"\/>\n\n\n\n<p class=\"wp-block-paragraph\">google_ads_content<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p class=\"wp-block-paragraph\">\u672c\u6587 \u4e3b\u8981\u4ece \u6c47\u7f16\u4ee3\u7801\u7684\u89d2\u5ea6\uff0c\u6f14\u793a <strong>\u5bc4\u5b58\u5668\u4f20\u53c2<\/strong> \u8ddf <strong>\u5806\u6808\u4f20\u53c2 <\/strong>\u533a\u522b\u3002\u4e3e\u4e2a\u4f8b\u5b50\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"prettyprint\" >ADD reg\/mem,%eax<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0a\u9762\u7684 \u662f ADD \u6307\u4ee4\uff0c\u5f80 <code class=\"prettyprint\" >eax<\/code> \u5bc4\u5b58\u5668\u4e0a\u52a0\u4e1c\u897f\uff0c\u6ce8\u610f\u8fd9\u4e2a source \uff08\u6765\u6e90\uff09\uff0c\u4ed6\u53ef\u4ee5\u662f register \u5bc4\u5b58\u5668\uff0c\u4e5f\u53ef\u4ee5\u662f memory \u4e00\u4e2a\u5185\u5b58\u5730\u5740\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"prettyprint\" ># \u5bc4\u5b58\u5668\u4f20\u9012\uff0c\u628a ebx \u76844\u5b57\u8282\u6570\u636e\u52a0\u7ed9 eax\u3002\nADD %ebx,%eax\n# \u6ce8\u610f ()\uff0c\u8fd9\u4e2a\u662f\u5bf9\u5730\u5740\u6c42\u503c\uff0c\u4e5f\u5c31\u662f\u628a ebp \u504f\u79fb 8\u5b57\u8282\u7684\u90a3\u4e2a\u5757\u6570\u636e\u7684\u503c \u52a0\u7ed9 eax\nADD 8(%ebp),%eax<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u4e2a\u5c31\u662f \u5bc4\u5b58\u5668\u4f20\u53c2 \u8ddf \u5806\u6808\u4f20\u53c2\u7684 \u533a\u522b\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>\u5bc4\u5b58\u5668\u4f20\u53c2 \u662f\u8c03\u7528 ADD \u4e4b\u524d \u628a\u53c2\u6570\u653e\u8fdb\u53bb <code class=\"prettyprint\" >ebx<\/code> \u5bc4\u5b58\u5668\u91cc\u9762\u3002<\/li><li>\u5806\u6808\u4f20\u53c2 \u662f\u8c03\u7528 ADD \u4e4b\u524d \u628a \u53c2\u6570\u653e\u5728 <code>8(%esp)<\/code> \u7684\u4f4d\u7f6e\uff0c\u4e5f\u5c31\u662f\u5185\u5b58\u7684\u4f4d\u7f6e\u3002<\/li><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\"><code class=\"prettyprint\" >ADD 8(%ebp),%eax<\/code> \u8fd9\u79cd\u53ea\u662f\u6c47\u7f16\u5668\u5c01\u88c5\u597d\u7684\u5199\u6cd5\uff0c\u5e95\u5c42\u8fd8\u662f\u8981\u4ece\u5185\u5b58\u62ff\u5230 CPU\uff0c\u53ea\u4e0d\u8fc7\u8fd9\u4e2a\u8fc7\u7a0b\u5bf9\u4f7f\u7528\u8005\u6765\u8bf4\u662f\u900f\u660e\u7684\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><code class=\"prettyprint\" >ADD 8(%ebp),%eax<\/code> \u5185\u5b58\u5bfb\u5740 \u7ffb\u8bd1\u6210 \u673a\u5668\u6307\u4ee4 \u5360 <strong>3\u4e2a\u5b57\u8282<\/strong>\uff0c<code>ADD %ebx,%eax<\/code> \u7ffb\u8bd1\u6210\u673a\u5668\u6307\u4ee4 \u5360 <strong>2\u4e2a\u5b57\u8282<\/strong>\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6240\u4ee5 <code class=\"prettyprint\" >ADD<\/code> \u6307\u4ee4 \u4ece\u5bc4\u5b58\u5668\u62ff\u53c2\u6570\uff0c\u786e\u5b9e\u662f\u6bd4\u4ece \u5185\u5b58\u5730\u5740\u62ff \u53c2\u6570\u5feb\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f46\u4e3a\u4ec0\u4e48 \u8bf4 \u5bc4\u5b58\u5668\u4f20\u53c2\u4f1a\u6bd4\u8f83\u590d\u6742\uff0c\u8bf7\u770b\u4e0b\u9762\u7684\u4ee3\u7801\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0b\u9762\u662f main \u51fd\u6570\u8c03\u7528 \u4e00\u4e2a add_two \u51fd\u6570\u7684\u6c47\u7f16\u4ee3\u7801\uff0c\u91c7\u7528\u5bc4\u5b58\u5668\u4f20\u53c2\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u539f\u59cbC\u8bed\u8a00\u4ee3\u7801\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"prettyprint\" >int add_two(int a,int b){\n    return a+b;\n}\nint main() {\n    int return_num = add_two(1,8);\n    return return_num - 3;\n}<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u5bc4\u5b58\u5668\u4f20\u53c2\u4ee3\u7801\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"prettyprint\" >        .text\n        .globl  main\n        .type   main, @function\n        .type   add_two, @function\nadd_two:\n        movl    %ebx, %eax\n        addl    %ecx, %eax\n        ret\nmain:\n        pushl   %ebp\n        movl    %esp, %ebp\n        \/* \u4e24\u4e2a\u53c2\u6570 \u5206\u522b\u4f20\u8fdb\u53bb ebx \uff0cecx\uff0c\u6240\u4ee5\u9700\u8981\u5148 \u4fdd\u5b58 ebx \uff0cecx \u7684\u65e7\u503c\u8fdb\u53bb \u5806\u6808\u3002 *\/\n        pushl   %ebx\n        pushl   %ecx\n        \/* \u5f00\u59cb\u5bc4\u5b58\u5668\u4f20\u53c2\uff0c \u53c2\u6570 1 \u4e22\u8fdb\u53bb ebx\uff0c\u53c2\u6570 8 \u4e22\u8fdb\u53bb ecx *\/\n        movl    $1, %ebx\n        movl    $8, %ecx\n        call    add_two\n        \/* \u4ece\u5806\u6808\u6062\u590d ecx ebx\u7684\u503c *\/\n        popl    %ecx\n        popl    %ebx\n        \/* \u8fd4\u56de\u503c\u51cf 3 *\/\n        subl    $3, %eax\n        popl    %ebp\n        ret<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u7f16\u8bd1\u547d\u4ee4\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"prettyprint\" >gcc -m32 -o main-32 main-32.s<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0a\u9762\u7684\u4ee3\u7801\u5c31\u662f\u5bc4\u5b58\u5668\u4f20\u53c2 \u4e2a <code class=\"prettyprint\" >add_two<\/code> \u51fd\u6570\uff0c\u63a5\u4e0b\u6765\u5f15\u7528 \u300a\u6c47\u7f16\u8bed\u8a00 \u57fa\u4e8eX86\u5904\u7406\u5668\u300b\u4e00\u4e66\u4e2d\u7684\u4e00\u6bb5\u8bdd\u3002<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>\u5728\u8fc7\u7a0b\u8c03\u7528\u4e4b\u524d\uff0c\u4efb\u4f55\u5b58\u653e\u53c2\u6570\u7684\u5bc4\u5b58\u5668\u987b\u9996\u5148\u5165\u6808\uff0c\u7136\u540e\u5411\u5176\u5206\u914d\u8fc7\u7a0b\u53c2\u6570\uff0c\u5728\u8fc7\u7a0b\u8fd4\u56de\u540e\u518d\u6062\u590d\u5176\u539f\u59cb\u503c<\/p><p>\u8fd9\u4e9b\u989d\u5916\u7684\u5165\u6808\u548c\u51fa\u6808\u64cd\u4f5c\u4e0d\u4ec5\u4f1a\u8ba9\u4ee3\u7801\u6df7\u4e71\uff0c\u8fd8\u6709\u53ef\u80fd\u6d88\u9664\u6027\u80fd\u4f18\u52bf\uff0c\u800c\u8fd9\u4e9b\u4f18\u52bf\u6b63\u662f\u901a\u8fc7\u4f7f\u7528\u5bc4\u5b58\u5668\u53c2\u6570\u6240\u671f\u671b\u83b7\u5f97\u7684\uff01\u6b64\u5916\uff0c\u7a0b\u5e8f\u5458\u8fd8\u8981\u975e\u5e38\u4ed4\u7ec6\u5730\u5c06 PUSH \u4e0e\u76f8\u5e94\u7684 POP \u8fdb\u884c\u5339\u914d\uff0c\u5373\u4f7f\u4ee3\u7801\u5b58\u5728\u7740\u591a\u4e2a\u6267\u884c\u8def\u5f84\u3002<\/p><\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">\u6240\u4ee5\uff0c\u5bc4\u5b58\u5668\u4f20\u53c2\u5f88\u590d\u6742\uff0c\u6211\u4e0a\u9762\u7684\u4ee3\u7801\u8fd8\u662f\u7b80\u5355\u7248\u7684\uff0c\u4e00\u4e2a PUSH \u8981\u5bf9\u5e94\u4e00\u4e2a POP\uff0cadd_two \u6267\u884c\u5b8c\u4e4b\u540e\u8981 \u987a\u5e8f\u628a\u4e4b\u524d\u538b\u8fdb\u53bb\u7684\u6570\u636e\u5f39\u51fa\u6765\u7ed9\u5bc4\u5b58\u5668\u3002\u5982\u679c\u8fd8\u6709\u903b\u8f91\u5206\u652f\uff0cPUSH \u8ddf POP \u5f88\u5bb9\u6613\u5199\u9519\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-css-opacity\"\/>\n\n\n\n<p class=\"wp-block-paragraph\">add_two \u5806\u6808\u4f20\u53c2\u7248\u672c\u7684\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"prettyprint\" >        .text\n        .globl  main\n        .type   main, @function\n        .type   add_two, @function\nadd_two:\n        pushl   %ebp\n        movl    %esp, %ebp\n\u200b\n        movl    12(%ebp), %eax\n        addl    8(%ebp), %eax\n\u200b\n        popl    %ebp\n        ret\nmain:\n        pushl   %ebp\n        movl    %esp, %ebp\n        \/* \u628a\u53c2\u6570\u538b \u8fdb\u53bb\u5806\u6808  *\/\n        pushl   $1\n        pushl   $8\n\u200b\n        call    add_two\n\u200b\n        \/* \u628a\u4e4b\u524d\u7684\u4e24\u4e2a\u53c2\u6570\u79fb\u51fa\u5806\u6808 *\/\n        addl    $8,%esp\n\u200b\n        \/* \u8fd4\u56de\u503c\u51cf 3 *\/\n        subl    $3, %eax\n        popl    %ebp\n        ret<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0b\u9762\u901a\u8fc7 gdb \u4e00\u6b65\u4e00\u6b65\u8bb2\u89e3 \u5806\u6808\u4f20\u53c2\u662f\u600e\u4e48\u4e00\u56de\u4e8b\uff0c\u5f00\u59cb<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"prettyprint\" >gcc -m32 -o main-32 main-32.s\n# \u8fd0\u884c gdb\ngdb .\/main-32\n# \u663e\u793a\u5bc4\u5b58\u5668\u7a97\u53e3\nlayout regs\n# \u65ad\u70b9\nb *main<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u4ece\u4e0b\u56fe\u53ef\u4ee5\u770b\u51fa\uff0c\u5728 <code class=\"prettyprint\" >pushl $1<\/code> \u6267\u884c\u4e4b\u524d\uff0c<code>esp<\/code> \u7b49\u4e8e <code>0xffffd348<\/code>\uff0c\u8bf7\u770b\u4e0b\u56fe\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"965\" height=\"626\" src=\"https:\/\/www.xianwaizhiyin.net\/wp-content\/uploads\/2022\/03\/x86-4-1.png\" alt=\"\" class=\"wp-image-1067\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u73b0\u5728 \u518d \u6572\u5165\u547d\u4ee4 <code class=\"prettyprint\" >ni<\/code>\uff0c\u6267\u884c <code>pushl $1<\/code>\uff0c\u5982\u4e0b\u56fe\u6240\u793a\uff0c<code>esp<\/code> \u53d8\u6210\u4e86 <code>0xffffd344<\/code>\uff0c\u8bf7\u770b\u4e0b\u56fe\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"964\" height=\"663\" src=\"https:\/\/www.xianwaizhiyin.net\/wp-content\/uploads\/2022\/03\/x86-4-2.png\" alt=\"\" class=\"wp-image-1068\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u6240\u4ee5\uff0c\u6b64\u65f6\uff0c\u6253\u5370 \u4e00\u4e0b 0xffffd344 ~ 0xffffd348 \u7684\u5185\u5b58\u6570\u636e\uff0c\u80af\u5b9a\u662f\u4e4b\u524d\u5b58\u8fdb\u53bb\u7684 1\u3002\u5982\u4e0b\u56fe\u6240\u793a\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"404\" height=\"165\" src=\"https:\/\/www.xianwaizhiyin.net\/wp-content\/uploads\/2022\/03\/x86-4-3.png\" alt=\"\" class=\"wp-image-1069\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u91cc\u6ce8\u610f\uff0c\u6211\u7684\u7535\u8111\u662f \u5c0f\u7aef \u5e8f\u5b58\u50a8\u7684\uff0c\u6240\u4ee5\u662f\u5012\u7740\u6765\u7684\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6b64\u65f6\uff0c\u53c2\u6570 1 \u5df2\u7ecf\u88ab\u653e\u8fdb\u53bb\u5185\u5b58\u91cc\u9762\u4e86\u3002\u53c2\u6570 8 \u540c\u7406\uff0c\u53c2\u6570 8 \u5728 0xffffd340 ~ 0xffffd344 \u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u73b0\u5728 \u6572 <code class=\"prettyprint\" >si<\/code> \u547d\u4ee4\uff0c\u8df3\u8fdb\u53bb add_two \u51fd\u6570\u7684\u5b9e\u73b0\uff0c\u5982\u4e0b\u56fe\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"971\" height=\"652\" src=\"https:\/\/www.xianwaizhiyin.net\/wp-content\/uploads\/2022\/03\/x86-4-4.png\" alt=\"\" class=\"wp-image-1070\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u91cc\u8981\u6ce8\u610f\uff0ccall \u6307\u4ee4\uff0c\u4f1a\u628amain \u7684\u4e0b\u4e00\u4e2a\u6307\u4ee4\u5730\u5740\u5b58\u8fdb\u53bb\u5806\u6808\uff0c\u6240\u4ee5call \u4f1a\u7528\u6389 4 \u5b57\u8282\u7684\u5806\u6808\u5185\u5b58\uff0c\u6240\u4ee5 <code class=\"prettyprint\" >esp<\/code> \u4f1a\u51cf 4\uff0c\u6b64\u65f6 <code>esp<\/code> \u5df2\u7ecf\u4ece <code>0xffffd340<\/code> \u51cf\u6210 <code>0xffffd33c<\/code>\uff0c\u6b64\u65f6\u6253\u5370\u4e00\u4e0b 0xffffd33c ~ 0xffffd340 \u7684\u5185\u5b58\uff0c\u5c31\u662f <code>addl $8,%esp<\/code> \u7684\u5730\u5740 <code>0x565561b4<\/code> \uff0c\u5982\u4e0b\u56fe\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"385\" height=\"57\" src=\"https:\/\/www.xianwaizhiyin.net\/wp-content\/uploads\/2022\/03\/x86-4-4-1.png\" alt=\"\" class=\"wp-image-1071\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u6267\u884c\u5b8c <code class=\"prettyprint\" >add_two<\/code> \u5c31\u4f1a\u6267\u884c <code>addl $8,%esp<\/code>\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6b64\u65f6 add_two \u8fd8\u6ca1\u5f00\u59cb\u6267\u884c\uff0c<code class=\"prettyprint\" >ebp<\/code> \u73b0\u5728\u7684\u503c <code>0xffffd348<\/code> \u662f \u4e0a\u5c42main \u51fd\u6570\u7684\u503c\uff0c\u56e0\u4e3a <code>ebp<\/code> \u662f\u57fa\u5740\uff0c\u4e0a\u5c42\u51fd\u6570\u53ef\u80fd\u7528\u8fd9\u4e2a\u5bc4\u5b58\u5668\u5e72\u4e86\u4e00\u4e9b\u4e8b\u60c5\uff0c\u6240\u4ee5 add_two \u8fd4\u56de\u53bb\u7684\u65f6\u5019\u4e0d\u80fd\u6539\u53d8 main \u7684 <code>ebp<\/code>\uff0c\u4f46\u662f add_two \u53c8\u9700\u8981 \u4f7f\u7528 <code>ebp<\/code>\uff0c\u6240\u4ee5\u7b2c\u4e00\u53e5 \u5c31\u662f <code>pushl %ebp<\/code> \u628a main \u7684 <code>ebp<\/code> \u5148\u5b58\u5230\u5806\u6808\u5185\u5b58\u91cc\uff0c\u8fd4\u56de\u53bb\u4e4b\u524d\u518d \u6062\u590d ebp\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">add_two \u7684\u7b2c\u4e00\u53e5\u6c47\u7f16 <code class=\"prettyprint\" >pushl %ebp<\/code> \u6267\u884c\u5b8c\u4e4b\u540e\uff0c\u6548\u679c\u56fe\u5982\u4e0b\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"975\" height=\"654\" src=\"https:\/\/www.xianwaizhiyin.net\/wp-content\/uploads\/2022\/03\/x86-4-5.png\" alt=\"\" class=\"wp-image-1063\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u6b64\u65f6\uff0c\u5185\u5b58\u91cc\u53c8\u6709 4\u4e2a \u5b57\u8282\u88ab\u4f7f\u7528\u6389\u4e86\uff0c<code class=\"prettyprint\" >esp<\/code> \u53c8\u51cf\u4e86 4\uff0c\u6b64\u65f6 <code>esp<\/code> \u5df2\u7ecf\u4ece <code>0xffffd33c<\/code> \u51cf\u6a59 <code>0xffffd338<\/code>\uff0c\u6b64\u65f6\u6253\u5370\u4e00\u4e0b 0xffffd338 ~ 0xffffd33c \u7684\u5185\u5b58\uff0c\u5c31\u662f main \u7684 <code>ebp<\/code> \u7684\u503c <code>0xffffd348<\/code> \uff0c\u5982\u4e0b\u56fe\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"374\" height=\"60\" src=\"https:\/\/www.xianwaizhiyin.net\/wp-content\/uploads\/2022\/03\/x86-4-6.png\" alt=\"\" class=\"wp-image-1064\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728 \u6572 <code class=\"prettyprint\" >ni<\/code>\uff0c\u6267\u884c <code>movl %esp, %ebp<\/code>\uff0c\u628a <code>esp<\/code> \u7684\u503c \u62f7\u8d1d \u7ed9 <code>ebp<\/code>\uff0c\u65b9\u4fbf\u64cd\u4f5c\u3002\u8fd9\u91cc\u6ce8\u610f <code>esp<\/code> \u53ef\u4ee5\u5b9a\u4f4d\u5230\u4e4b\u524d\u7684 1 \u8ddf 8\u90a3\u4e2a\u53c2\u6570\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6b64\u65f6\u6b64\u523b\uff0c<code class=\"prettyprint\" >esp<\/code> \u7b49\u4e8e <code>0xffffd338<\/code> \uff0c\u4e4b\u524d \u7684\u53c2\u65701 \u5728 0xffffd344 ~ 0xffffd348 \uff0c\u53c2\u6570 8 \u5728 0xffffd340 ~ 0xffffd344\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6240\u4ee5 \u53c2\u6570 8 \u5c31\u7b49\u4e8e <code class=\"prettyprint\" >esp<\/code> + 8 \u5b57\u8282\uff0c\u4e3a\u4ec0\u4e48\u662f \u52a0 8 \u5b57\u8282\uff0c\u56e0\u4e3a <code>call add_two<\/code> \u538b\u4e86 4\u5b57\u8282\u8fdb\u53bb\u5806\u6808\uff0c<code>pushl %ebp<\/code> \u4e3a\u4e86\u4fdd\u5b58 main \u7684 <code>ebp<\/code> \u53c8\u538b\u4e86 4\u5b57\u8282\uff0c\u6240\u4ee5\u4e00\u5171 8\u4e2a\u5b57\u8282\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u53c2\u6570 1 \u5c31\u7b49\u4e8e <code class=\"prettyprint\" >esp<\/code> + 12\u5b57\u8282\uff0c\u8fd9\u4e2a\u539f\u7406\u4e5f\u5c31\u662f \u4e0b\u9762\u4e24\u53e5\u4ee3\u7801\u7684\u7531\u6765\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"prettyprint\" >movl    12(%ebp), %eax\naddl    8(%ebp), %eax<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0a\u9762\u8fd9\u4e24\u53e5 \u6c47\u7f16\u6267\u884c\u5b8c\u4e4b\u540e\uff0c<code class=\"prettyprint\" >eax<\/code> \u5df2\u7ecf\u6709\u4e86\u60f3\u8981\u7684\u503c 9\uff0c\u6700\u540e\u6267\u884c <code>popl %ebp<\/code> \u6062\u590d main \u7684 <code>ebp<\/code>\uff0c \u4e0b\u56fe\u662f <code>add_two<\/code> \u4e2d <code>popl %ebp<\/code> \u6267\u884c\u5b8c\u540e\u7684\u72b6\u6001\uff0cebp \u5df2\u7ecf\u6062\u590d\u5230 \u8fdb\u5165 add_two \u4e4b\u524d\u7684\u503c\u4e86\uff0c\u4e5f\u5c31\u662f <code>0xffffd348<\/code>\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"952\" height=\"650\" src=\"https:\/\/www.xianwaizhiyin.net\/wp-content\/uploads\/2022\/03\/x86-4-7.png\" alt=\"\" class=\"wp-image-1065\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u73b0\u5728 <code class=\"prettyprint\" >add_two<\/code> \u8fd8\u6709\u6700\u540e\u4e00\u4e2a\u6307\u4ee4\u6ca1\u6267\u884c\uff0c\u4e5f\u5c31\u662f <code>ret<\/code>\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e4b\u524d\u8bf4\u8fc7\uff0c add_two \u6267\u884c\u5b8c\u4e4b\u540e\uff0c\u9700\u8981\u628a <code class=\"prettyprint\" >eip<\/code> \u5bc4\u5b58\u5668\u6539\u5230 main \u6267\u884c\u5b8c add_two \u7684\u4e0b\u4e00\u884c\u6c47\u7f16\u4ee3\u7801\u7684\u5730\u5740\u3002\u4e0b\u4e00\u884c\u6c47\u7f16\u4ee3\u7801\u7684\u5730\u5740\u5df2\u7ecf\u5728 <code>call add_two<\/code> \u7684\u65f6\u5019\uff0c\u538b\u8fdb\u53bb\u5806\u6808\u4e86\uff0c\u5c31\u662f 0xffffd33c ~ 0xffffd340\u3002\u6b64\u523b <code>esp<\/code> \u6b63\u597d\u4e5f\u662f 0xffffd33c \uff0c\u6240\u4ee5 ret \u76f4\u63a5\u5728 <code>esp<\/code> \u7684\u4f4d\u7f6e\u53d6 4\u4e2a\u5b57\u8282 \u4e22\u8fdb\u53bb <code>eip<\/code> \u5c31\u884c\u4e86\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u90a3 4 \u4e2a\u5b57\u8282 0xffffd33c ~ 0xffffd340 \u5c31\u662f <code class=\"prettyprint\" >addl $8,%esp<\/code> \uff0c\u4e5f\u5c31\u662f\u4e0b\u4e00\u884c\u6c47\u7f16\u4ee3\u7801\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6572 <code class=\"prettyprint\" >ni<\/code>\uff0c\u8ba9\u7a0b\u5e8f \u6267\u884c\u5b8c <code>add_two<\/code> \u7684 <code>ret<\/code> \u6307\u4ee4\uff0c\u6548\u679c\u56fe\u5982\u4e0b\uff0c\u6b64\u523b\u4ee3\u7801\u5df2\u7ecf\u56de\u5230 main <code>addl $8,%esp<\/code> \u7684\u4f4d\u7f6e\u7684\u4e86 \u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"889\" height=\"650\" src=\"https:\/\/www.xianwaizhiyin.net\/wp-content\/uploads\/2022\/03\/x86-4-8.png\" alt=\"\" class=\"wp-image-1066\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u73b0\u5728\uff0c\u6b64\u65f6\u6b64\u523b\uff0c\u5806\u6808\u8fd8\u6709\u4e24\u4e2a\u4e1c\u897f\u6ca1\u6709\u5904\u7406\uff0c\u5c31\u662f\u4e4b\u524d\u538b\u8fdb\u53bb\u7684 \u53c2\u65701 \u53c2\u6570 8\uff0c\u5728\u672c\u6587\u4ee3\u7801\u91cc\u4e0d\u5904\u7406\u8fd9\u4e24\u4e2a\u4e1c\u897f\u4e5f\u53ef\u4ee5\uff0c\u56e0\u4e3a\u672c\u6587\u6ca1\u6709\u5d4c\u5957\u4f7f\u7528 main \u51fd\u6570\uff0c\u4f46\u662f\u6b63\u89c4\u7684\u505a\u6cd5\u662f\u9700\u8981\u628a \u8fd9\u4e24\u4e2a\u53c2\u6570\u5254\u9664\u51fa \u5806\u6808\uff0c\u600e\u4e48\u5254\u9664\uff1f\u4e24\u4e2a\u53c2\u6570\u4e00\u5171\u5360 8\u5b57\u8282\uff0c\u76f4\u63a5\u628a <code class=\"prettyprint\" >esp<\/code> \u52a0 8\u5c31\u884c\u4e86\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6700\u540e \u5c31\u662f \u628a add_two \u8fd4\u56de\u7684\u53c2\u6570\uff0c\u51cf\u53bb 3 \u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4ee3\u7801\u8fd0\u884c\u5b8c\u6bd5\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-css-opacity\"\/>\n\n\n\n<p class=\"wp-block-paragraph\">\u4ece\u4e0a\u9762\u7684\u6d41\u7a0b\u770b\uff0c\u5806\u6808\u4f20\u53c2 \u786e\u5b9e\u6bd4\u8f83\u65b9\u4fbf\uff0c\u53ea\u9700\u8981\u8bb0\u5f55\u4e00\u4e0b\u538b\u4e86\u591a\u5c11\u5b57\u8282\u53c2\u6570\u8fdb\u5806\u6808\uff0c\u51fa\u6765\u7684\u4e4b\u540e <code class=\"prettyprint\" >esp<\/code> \u52a0\u4e0a\u591a\u5c11\u5b57\u8282\u5c31\u53ef\u4ee5\u4e86\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5bc4\u5b58\u5668\u4f20\u53c2 \u4ee5\u53ca \u5806\u6808\u4f20\u53c2\uff0c\u8fd8\u6709\u4e00\u4e9b\u66f4\u7b80\u6d01\uff0c\u4e0d\u5bb9\u6613\u51fa\u9519\u7684\u5199\u6cd5\u8ddf\u6307\u4ee4\uff0c\u5728 \u300aX86 \u6c47\u7f16\u8bed\u8a00\uff0c\u57fa\u4e8ex86\u300b\u7b2c 8 \u7ae0\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u76f8\u5173\u9605\u8bfb\uff1a<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5f3a\u70c8\u63a8\u8350\u9605\u8bfb \u300aX86 \u6c47\u7f16\u8bed\u8a00\uff0c\u57fa\u4e8ex86\u300b\u7b2c 8 \u7ae0\uff0c\u8bb2\u89e3\u5f97\u66f4\u52a0\u8be6\u7ec6\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>\u300aX86 \u6c47\u7f16\u8bed\u8a00\uff0c\u57fa\u4e8ex86\u300b\u7b2c 8 \u7ae0<\/li><li><a href=\"https:\/\/blog.csdn.net\/qq_43573676\/article\/details\/104357256\">\u300a\u6c47\u7f16\u4e2d\u7684\u5806\u6808\u4f20\u53c2\u300b<\/a><\/li><\/ol>\n\n\n\n<hr class=\"wp-block-separator has-css-opacity\"\/>\n\n\n\n<p class=\"wp-block-paragraph\">\u7531\u4e8e\u7b14\u8005\u7684\u6c34\u5e73\u6709\u9650\uff0c 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