fergalmoran/ladybird
1
0
Fork 0
mirror of https://github.com/fergalmoran/ladybird.git synced 2026-02-19 22:25:36 +00:00
Code Issues Packages Projects Releases Wiki Activity

Kernel: Unmap Prekernel pages after they are no longer needed

Browse Source 
The Prekernel's memory is only accessed until MemoryManager has been
initialized. Keeping them around afterwards is both unnecessary and bad,
as it prevents the userland from using the 0x100000-0x155000 virtual
address range.

Co-authored-by: Idan Horowitz <idan.horowitz@gmail.com>
This commit is contained in:
Daniel Bertalan
2021-12-19 01:15:12 +01:00
committed by Brian Gianforcaro
parent 2f1b4b8a81
commit 4fc28bfe02
4 changed files with 31 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
Kernel/init.cpp
View File

@@ -193,6 +193,8 @@ extern "C" [[noreturn]] UNMAP_AFTER_INIT void init(BootInfo const& boot_info)
CommandLine::initialize();
Memory::MemoryManager::initialize(0);
MM.unmap_prekernel();
// Ensure that the safemem sections are not empty. This could happen if the linker accidentally discards the sections.
VERIFY(+start_of_safemem_text != +end_of_safemem_text);
VERIFY(+start_of_safemem_atomic_text != +end_of_safemem_atomic_text);