{"id":103,"date":"2021-07-12T16:58:28","date_gmt":"2021-07-12T08:58:28","guid":{"rendered":"https:\/\/www.52dixiaowo.com\/hb\/?p=103"},"modified":"2021-07-12T16:58:28","modified_gmt":"2021-07-12T08:58:28","slug":"%e6%b1%87%e7%bc%96-jmp%e6%8c%87%e4%bb%a4","status":"publish","type":"post","link":"https:\/\/www.52dixiaowo.com\/hb\/post-103.html","title":{"rendered":"\u6c47\u7f16 jmp\u6307\u4ee4"},"content":{"rendered":"\n<p>jmp\u4e3a\u65e0\u6761\u4ef6\u8f6c\u79fb, \u53ef\u4ee5\u53ea\u4fee\u6539IP, \u4e5f\u53ef\u4ee5\u540c\u65f6\u4fee\u6539CS:IP<\/p>\n\n\n\n<p>jmp\u6307\u4ee4\u8981\u7ed9\u51fa\u4e24\u79cd\u4fe1\u606f:<\/p>\n\n\n\n<ul><li>\u8f6c\u79fb\u7684\u76ee\u7684\u5730\u5740<\/li><li>\u8f6c\u79fb\u7684\u8ddd\u79bb( \u6bb5\u95f4\u8f6c\u79fb, \u6bb5\u5185\u77ed\u8f6c\u79fb, \u6bb5\u5185\u8fd1\u8f6c\u79fb)<\/li><\/ul>\n\n\n\n<p>\u8bed\u6cd5\u683c\u5f0f:<\/p>\n\n\n\n<ul><li>jmp short \u6807\u53f7 ==> \u77ed\u8f6c\u79fb, \u6307\u5b9a\u4fee\u6539IP\u8303\u56f4-128~127 ( 8\u4f4d )<\/li><li>jmp near ptr \u6807\u53f7 ==> \u8fd1\u8f6c\u79fb, \u4fee\u6539ip\u8303\u56f4-32769~32767 ( 16\u4f4d )<\/li><li>jmp far ptr \u6807\u53f7 ==>  \u6bb5\u95f4\u8f6c\u79fb, \u4e5f\u53eb\u8fdc\u8f6c\u79fb, <\/li><\/ul>\n\n\n\n<h2>\u77ed\u8f6c\u79fb\u5b9e\u4f8b<\/h2>\n\n\n\n<pre class=\"wp-block-code\"><code>code segment\n    assume cs:code\nstart: \n    mov ax, 0\n    jmp short s\n    add ax, 1\n    s:\n        inc ax\ncode ends\nend start<\/code><\/pre>\n\n\n\n<p>\u4e0a\u8ff0\u4ee3\u7801\u4ecejmp\u76f4\u63a5\u8df3\u5230\u4e86s, \u6240\u4ee5\u7ed3\u679cax\u4e3a1<\/p>\n\n\n\n<p>\u6c47\u7f16\u6307\u4ee4, \u53ef\u4ee5\u7ffb\u8bd1\u4e3a\u673a\u5668\u7801, \u4f8b\u5982<\/p>\n\n\n\n<figure class=\"wp-block-table is-style-regular\"><table><tbody><tr><td>\u6c47\u7f16\u6307\u4ee4<\/td><td>\u673a\u5668\u6307\u4ee4<\/td><\/tr><tr><td>mov ax, 0123<\/td><td>B8 23 01<\/td><\/tr><tr><td>mov ax, ds:[0123]<\/td><td>A1 23 01<\/td><\/tr><tr><td>push ds:[0123]<\/td><td>FF 36 23 01<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>\u6c47\u7f16\u6307\u4ee4\u4e2d, \u64cd\u4f5c\u7801\u548c\u6570\u636e( \u6216\u5730\u5740 ), \u662f\u5206\u5f00\u7684, \u4f8b\u5982\u53ef\u4ee5\u770b\u5230ax\u5bf9\u5e94B8, \u800c0123\u5219\u539f\u5c01\u4e0d\u52a8<\/p>\n\n\n\n<p>\u5f53\u6211\u4eec\u4f7f\u7528 debug \u8c03\u8bd5jmp\u77ed\u8f6c\u79fb\u7a0b\u5e8f\u65f6, \u4f7f\u7528 u \u7ffb\u8bd1\u6307\u4ee4, \u4f1a\u540c\u65f6\u5f97\u5230\u673a\u5668\u7801\u548c\u6307\u4ee4, \u4f46\u6211\u4eec\u53d1\u73b0, jmp 0008 \u7684\u673a\u5668\u7801\u4e3a EB03, \u5373cpu\u5e76\u4e0d\u77e5\u9053cs:ip<\/p>\n\n\n\n<p>\u4fee\u6539\u77ed\u8f6c\u79fb\u7a0b\u5e8f, \u5728add ax, 1\u540e\u4e00\u53e5\u589e\u52a0\u4e00\u4e2aadd ax, 1\u7136\u540e\u518d\u8c03\u8bd5\u65f6, \u53d1\u73b0\u5f97\u5230\u7684\u662fjmp 000B\u5bf9\u5e94 EB06, \u6211\u4eec\u53d1\u73b0\u4e86cpu\u4e0d\u9700\u8981cs:ip\u5c31\u53ef\u4ee5\u5b9e\u73b0\u8f6c\u79fb, \u800c\u5b83\u662f<strong>\u6839\u636e\u504f\u79fb\u5730\u5740\u53d6\u5f97\u7684<\/strong>, \u4e00\u53e5add ax, 1\u662f3\u4e2a\u5b57\u8282( \u673a\u5668\u7801050100 ), \u90a3\u4e482\u53e5\u91cd\u590d\u5c31\u662f06, \u5b83\u7684\u673a\u5668\u7801( \u64cd\u4f5c\u7801EB, \u6570\u636e06)<\/p>\n\n\n\n<p>jmp\u77ed\u8f6c\u79fb\u4e2d, \u7b80\u8bb0\u4e3a ip = ip + \u504f\u79fb, \u5730\u5740\u7684 -128~127\u662f\u8865\u7801\u5f62\u5f0f<\/p>\n\n\n\n<p>\u5982\u679c\u8df3\u8f6c\u7684\u6807\u53f7, \u5728\u5f53\u524d\u6307\u4ee4\u524d\u9762, \u5373\u504f\u79fb\u4e3a\u8d1f\u6570\u65f6, \u662f\u5426\u6b7b\u5faa\u73af? \u4e3a\u4f55\u4e0d\u4f7f\u7528cs:ip\u8f6c\u79fb? \u5728\u5b9e\u9645\u7a0b\u5e8f\u4e2dcs:ip\u662f\u5426\u4f1a\u53d8\u5316\u800c\u5bfc\u81f4\u8df3\u8f6c\u5931\u8d25?<\/p>\n\n\n\n<h2>\u8fdc\u8f6c\u79fb\u5b9e\u4f8b<\/h2>\n\n\n\n<p>\u77ed\u8f6c\u79fb, \u8fd1\u8f6c\u79fb\u8bed\u6cd5\u975e\u5e38\u76f8\u4f3c, \u51e0\u4e4e\u6ca1\u6709\u533a\u522b,  \u800c\u8fdc\u8f6c\u79fb\u5374\u76f8\u5dee\u751a\u8fdc<\/p>\n\n\n\n<p>jmp far ptr \u6807\u53f7, \u9700\u8981\u4f7f\u7528 cs:ip \u6307\u5b9a\u8f6c\u79fb\u7684cs:ip ( \u5982\u679c\u5c11\u4e8e128, \u5219\u4f1a\u81ea\u52a8\u53d8\u6210\u77ed\u8f6c\u79fb)<\/p>\n\n\n\n<p>\u8fd9\u91cc, \u4f7f\u7528dup\u5f00\u8f9f\u4e00\u4e2a128\u5355\u4f4d\u7a7a\u95f4, \u786e\u4fdd\u5b83\u8df3\u8f6c\u7684\u8d85\u8fc7128, \u5426\u5219\u4f1a\u81ea\u52a8\u53d8\u4e3a\u77ed\u8f6c\u79fb<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>code segment\n    assume cs:code\nstart: \n    mov ax, 0\n    jmp far ptr s\n    db 128 dup(0)\n    add ax, 1\n    s:\n        inc ax\ncode ends\nend start<\/code><\/pre>\n\n\n\n<p>\u4f7f\u7528debug\u5f97\u5230\u7684\u6307\u4ee4, jmp 076c:008b, \u5bf9\u5e94\u7684\u673a\u5668\u7801\u4e3a EA<strong>8B00<\/strong>6C07<\/p>\n\n\n\n<p>\u5728\u8fd9\u91cc, 076c\u8868\u793a cs, \u800c 008b\u5219\u662fip, \u53ef\u4ee5\u770b\u5230\u8df3\u8f6c\u7684\u786e\u5b9e\u662fcs:ip, \u800c\u4e0d\u662f\u504f\u79fb\u5730\u5740<\/p>\n\n\n\n<h2>jmp\u7684\u5176\u4ed6\u7528\u6cd5<\/h2>\n\n\n\n<p>jmp\u8fd8\u6709\u5176\u4ed6\u8bed\u6cd5, \u4f8b\u5982<\/p>\n\n\n\n<ul><li>jmp 16\u4f4d\u5bc4\u5b58\u5668 ( \u5982: jmp ax, ax\u4e2d\u5b58\u653e\u4e86ip )<\/li><li>jmp \u5185\u5b58\u5730\u5740 ( \u91cd\u70b9\u4ecb\u7ecd )<\/li><\/ul>\n\n\n\n<p>\u5728\u5185\u5b58\u4e2d\u4f7f\u7528jmp, \u6709\u4ee5\u4e0b\u4e24\u79cd\u8bed\u6cd5<\/p>\n\n\n\n<ul><li>jmp word ptr \u5185\u5b58\u5355\u5143(16\u4f4d\u6bb5\u5185\u8f6c\u79fb, \u53ea\u80fd\u662fip)<\/li><li>jmp dword ptr \u5185\u5b58\u5355\u5143\u5730\u5740( \u53cc\u5b57, 32\u4f4d, \u6bb5\u95f4\u8f6c\u79fb)<\/li><\/ul>\n\n\n\n<p>\u9700\u8981\u6ce8\u610f, \u9ad8\u4f4dcs, \u4f4e\u4f4dip, \u90a3\u4e48\u5185\u5b58\u4e2d\u5b9e\u9645\u662f, ip, cs ( ip=\u5185\u5b58\u5730\u5740, cs=\u5185\u5b58\u5730\u5740+2)<\/p>\n\n\n\n<p>\u4ee5\u4e0b\u5b9e\u4f8b, \u5c06\u8df3\u8f6c\u5230 0:0123H<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>mov ax, 0123H\nmov ds:&#91;0], ax\nmov word ptr ds:&#91;2]\njmp dword ptr ds:&#91;0]<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>jmp\u4e3a\u65e0\u6761\u4ef6\u8f6c\u79fb, \u53ef\u4ee5\u53ea\u4fee\u6539IP, \u4e5f\u53ef\u4ee5\u540c\u65f6\u4fee\u6539CS:IP jmp\u6307\u4ee4\u8981\u7ed9\u51fa\u4e24\u79cd\u4fe1\u606f: \u8f6c\u79fb\u7684\u76ee\u7684\u5730\u5740 &hellip; <a href=\"https:\/\/www.52dixiaowo.com\/hb\/post-103.html\" class=\"more-link\">\u7ee7\u7eed\u9605\u8bfb <span class=\"screen-reader-text\">\u6c47\u7f16 jmp\u6307\u4ee4<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[5],"tags":[],"_links":{"self":[{"href":"https:\/\/www.52dixiaowo.com\/hb\/wp-json\/wp\/v2\/posts\/103"}],"collection":[{"href":"https:\/\/www.52dixiaowo.com\/hb\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.52dixiaowo.com\/hb\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.52dixiaowo.com\/hb\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.52dixiaowo.com\/hb\/wp-json\/wp\/v2\/comments?post=103"}],"version-history":[{"count":0,"href":"https:\/\/www.52dixiaowo.com\/hb\/wp-json\/wp\/v2\/posts\/103\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.52dixiaowo.com\/hb\/wp-json\/wp\/v2\/media?parent=103"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.52dixiaowo.com\/hb\/wp-json\/wp\/v2\/categories?post=103"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.52dixiaowo.com\/hb\/wp-json\/wp\/v2\/tags?post=103"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}