Bananymous/banan-os
1
1
Fork 1
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Kernel: Fix bitmap byte index calculation in PMM

Browse Source 
No idea how I had not crashed here earlier, but running on real hw with
a bit initrd ended up crashing :D
This commit is contained in:
Bananymous
2026-01-04 01:16:43 +02:00
parent 706c0816dd
commit 4b5a8196c3
1 changed files with 6 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
kernel/kernel/Memory/PhysicalRange.cpp
View File

@@ -98,8 +98,9 @@ namespace Kernel
[this](size_t buffer_bit) -> bool
{
const size_t page_index = buffer_bit / bits_per_page;
const size_t byte = buffer_bit / 8;
const size_t bit = buffer_bit % 8;
const size_t bit_index = buffer_bit % bits_per_page;
const size_t byte = bit_index / 8;
const size_t bit = bit_index % 8;
uint8_t current;
PageTable::with_fast_page(m_paddr + page_index * PAGE_SIZE, [&current, byte] {
@@ -113,8 +114,9 @@ namespace Kernel
[this](size_t buffer_bit) -> void
{
const size_t page_index = buffer_bit / bits_per_page;
const size_t byte = buffer_bit / 8;
const size_t bit = buffer_bit % 8;
const size_t bit_index = buffer_bit % bits_per_page;
const size_t byte = bit_index / 8;
const size_t bit = bit_index % 8;
PageTable::with_fast_page(m_paddr + page_index * PAGE_SIZE, [byte, bit] {
volatile uint8_t& current = PageTable::fast_page_as_sized<volatile uint8_t>(byte);
current = current | (1u << bit);