eliott/ladybird
1
0
Fork 0
mirror of https://github.com/LadybirdBrowser/ladybird synced 2026-05-05 06:32:30 +02:00
Code Issues Packages Projects Releases Wiki Activity

Kernel: Move the expand_range_to_page_boundaries helper to MemoryManager

Browse Source 
This helper can (and will) be used in more parts of the kernel besides
the mmap-family of syscalls.
This commit is contained in:
Idan Horowitz
2021-11-29 21:19:58 +02:00
parent ff6b43734c
commit 4ca39c7110
Notes: sideshowbarker 2024-07-17 23:13:43 +09:00 
Author: https://github.com/IdanHo
Commit: https://github.com/SerenityOS/serenity/commit/4ca39c71104
Pull-request: https://github.com/SerenityOS/serenity/pull/10674
Reviewed-by: https://github.com/bgianfo
Reviewed-by: https://github.com/linusg ✅
2 changed files with 21 additions and 21 deletions
Download Patch File Download Diff File Expand all files Collapse all files

17
Kernel/Memory/MemoryManager.h
View File

@@ -329,4 +329,21 @@ inline bool PhysicalPage::is_lazy_committed_page() const
return this == &MM.lazy_committed_page();
}
inline ErrorOr<Memory::VirtualRange> expand_range_to_page_boundaries(FlatPtr address, size_t size)
{
if (Memory::page_round_up_would_wrap(size))
return EINVAL;
if ((address + size) < address)
return EINVAL;
if (Memory::page_round_up_would_wrap(address + size))
return EINVAL;
auto base = VirtualAddress { address }.page_base();
auto end = Memory::page_round_up(address + size);
return Memory::VirtualRange { base, end - base.get() };
}
}