{"id":5514,"date":"2014-03-30T23:33:19","date_gmt":"2014-03-30T23:33:19","guid":{"rendered":"https:\/\/unknownerror.org\/index.php\/2014\/03\/30\/cygwin-assembly-language-development-collection-of-common-programming-errors\/"},"modified":"2014-03-30T23:33:19","modified_gmt":"2014-03-30T23:33:19","slug":"cygwin-assembly-language-development-collection-of-common-programming-errors","status":"publish","type":"post","link":"https:\/\/unknownerror.org\/index.php\/2014\/03\/30\/cygwin-assembly-language-development-collection-of-common-programming-errors\/","title":{"rendered":"Cygwin: Assembly language development?-Collection of common programming errors"},"content":{"rendered":"<p>You can totally run assembly programs in Cygwin. I&#8217;m guessing that your load failed because there&#8217;s a bunch of stuff that has to happen between when Windows executes a process and when you get to the <code>main<\/code> function. When gcc is given assembly as input, it will link in the appropriate boilerplate code to generate a valid executable.<\/p>\n<p>Here&#8217;s a sample assembly program. Save it as hello.s:<\/p>\n<pre><code>.intel_syntax noprefix\n\n.section .text\n\n.globl _main\n_main:\n        enter 0, 0\n\n        \/\/ welcome message\n        push    OFFSET s_HelloWorld\n        call    _printf\n        pop     eax\n\n        \/\/ add three numbers\n        push    2\n        push    4\n        push    5\n        call    _addThree\n        add     esp, 3 * 4\n\n        \/\/ print returned value\n        push    eax\n        push    OFFSET s_PercentD\n        call    _printf\n        add     esp, 2 * 4\n\n        xor     eax, eax\n        leave\n        ret\n\n\/\/ Add three numbers\n_addThree:\n       enter    0, 0\n       mov      eax, DWORD PTR [ebp + 8]\n       add      eax, DWORD PTR [ebp + 12]\n       add      eax, DWORD PTR [ebp + 16]\n       leave\n       ret\n\n.section .rdata\n\ns_HelloWorld:\n       .ascii  \"Hello, world.\\n\\0\"\ns_PercentD:\n       .asciz \"%d\\n\"\n<\/code><\/pre>\n<p>then run it with<\/p>\n<pre><code>$ gcc -mno-cygwin hello.s -o hello &amp;&amp; .\/hello\nHello, world.\n11\n<\/code><\/pre>\n<p>The reference for your processor&#8217;s assembly instructions are contained in the AMD64 Architecture Programmer&#8217;s Manual. The C calling convention is documented in this page from the Internet Archive; maybe you can find a similar one that still has the images?<\/p>\n<p>Note that Cygwin will only do 32-bit assembly right now; the (non-consumer) world is all 64 bits now, and in 64-bit mode on modern processors you have many more registers and different calling conventions.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>You can totally run assembly programs in Cygwin. I&#8217;m guessing that your load failed because there&#8217;s a bunch of stuff that has to happen between when Windows executes a process and when you get to the main function. When gcc is given assembly as input, it will link in the appropriate boilerplate code to generate [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-5514","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/posts\/5514","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/comments?post=5514"}],"version-history":[{"count":0,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/posts\/5514\/revisions"}],"wp:attachment":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/media?parent=5514"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/categories?post=5514"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/tags?post=5514"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}