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Kernel: Add Memory::RegionTree to share code between AddressSpace and MM

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RegionTree holds an IntrusiveRedBlackTree of Region objects and vends a
set of APIs for allocating memory ranges.

It's used by AddressSpace at the moment, and will be used by MM soon.
This commit is contained in:
Andreas Kling 2022-04-02 21:12:05 +02:00
parent 02a95a196f
commit ffe2e77eba
8 changed files with 219 additions and 154 deletions
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2
Kernel/Syscalls/clock.cpp
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@ -17,7 +17,7 @@ ErrorOr<FlatPtr> Process::sys$map_time_page()
auto& vmobject = TimeManagement::the().time_page_vmobject();
auto range = TRY(address_space().try_allocate_randomized(PAGE_SIZE, PAGE_SIZE));
auto range = TRY(address_space().region_tree().try_allocate_randomized(PAGE_SIZE, PAGE_SIZE));
auto* region = TRY(address_space().allocate_region_with_vmobject(range, vmobject, 0, "Kernel time page"sv, PROT_READ, true));
return region->vaddr().get();
}

2
Kernel/Syscalls/mmap.cpp
View file

@ -193,7 +193,7 @@ ErrorOr<FlatPtr> Process::sys$mmap(Userspace<Syscall::SC_mmap_params const*> use
auto range = TRY([&]() -> ErrorOr<Memory::VirtualRange> {
if (map_randomized)
return address_space().try_allocate_randomized(rounded_size, alignment);
return address_space().region_tree().try_allocate_randomized(rounded_size, alignment);
// If MAP_FIXED is specified, existing mappings that intersect the requested range are removed.
if (map_fixed)