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    <p>Probably your issue is that <code>size_t</code> isn't the same as <code>int</code> on your platform, or <code>size_t</code> isn't specified correctly at all. The pointer types should be OK (technically, they should match too, but on most systems <code>sizeof(char*) == sizeof(void*)</code>).</p> <p>If you're developing your own kernel, you'd want to write your own <code>system.h</code>. If you're writing both <code>system.h</code> and <code>main.c</code>, you can make them match up however you'd like. If you look at <a href="http://www.osdever.net/bkerndev/Docs/creatingmain.htm" rel="noreferrer">this page of the tutorial</a>, you'd see that header and C source both declare <code>memcpy</code> as:</p> <pre><code>unsigned char *memcpy(unsigned char *dest, const unsigned char *src, int count); </code></pre> <p>But if you download the example source files at the end of the tutorial, you find it is instead:</p> <pre><code>void *memcpy(void *dest, const void *src, size_t count); </code></pre> <p>Looking at the top of that file, you find the following comment:</p> <pre><code>/* bkerndev - Bran's Kernel Development Tutorial * By: Brandon F. (friesenb@gmail.com) * Desc: Main.c: C code entry. * * Notes: No warranty expressed or implied. Use at own risk. */ </code></pre> <p>It doesn't look like you're trying to follow a tutorial, but rather that you're trying to cut and paste code from a tutorial. That's like trying to learn to perform brain surgery by following along in a book. You might get it to work, but if you don't really understand what you're doing... well, please do the world a favor and don't use it for anything critical.</p>
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    1. USDaniel Pryden
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    1. COlol. well its more like im trying to use a tutorial to understand how a kernel works a little bit better but since i don't know all the ins and outs of C im forced to just using the code already provided. Thanks for the advice!
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      1. USMatt Phillips
 

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