<p>In <a href="https://github.com/ipxe/ipxe/pull/36#discussion_r34925905">src/arch/i386/image/freebsd.c</a>:</p>
<pre style='color:#555'>> +
> + // Copy image
> + for_each_image ( module_image ) {
> + if (image == module_image) continue;
> + memcpy_user(phys_to_user(buffer), 0, module_image->data, 0, module_image->len);
> + buffer += ALIGN_PAGE(module_image->len);
> + }
> +
> + kern_end = buffer;
> +
> + entry_lo = ehdr.e_entry & 0xffffffff;
> + entry_hi = (ehdr.e_entry >> 32) & 0xffffffff;
> +
> + for (i = 0; i < 512; i++) {
> + /* Each slot of the level 4 pages points to the same level 3 page */
> + PT4[i] = (p4_entry_t)VTOP((void *)&PT3[0]);
</pre>
<p>Don't worry too much about the specifics of vtop and friends, that is a btx-ism that won't apply the same way in this environment. btx runs with a non-zero segmentation offset. You'll be looking for whatever the equivalent is here if there's even a difference between virtual and physical addresses.</p>
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