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Philipp Oppermann
2017-06-09 18:46:59 +02:00
parent c104445880
commit a1ed273f7f
5 changed files with 10 additions and 17 deletions
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blog/content/posts/02-entering-longmode/index.md
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@@ -4,10 +4,6 @@ order = 2
url = "entering-longmode"
date = "2015-08-25"
updated = "2015-10-29"
aliases = [
"/2015/08/25/entering-longmode/",
"/rust-os/entering-longmode.html",
]
+++
In the [previous post] we created a minimal multiboot kernel. It just prints `OK` and hangs. The goal is to extend it and call 64-bit [Rust] code. But the CPU is currently in [protected mode] and allows only 32-bit instructions and up to 4GiB memory. So we need to set up _Paging_ and switch to the 64-bit [long mode] first.