Struct AddressSpace 

pub struct AddressSpace {
    page_ptr: VirtAddr,
    vmas: BTreeSet<Vma>,
}

Type to represent the memory of a process or the kernel by holding a pointer to its page tables and VMAs

Fields

page_ptr: VirtAddr

vmas: BTreeSet<Vma>

Implementations

impl AddressSpace

pub fn empty(page_ptr: VirtAddr) -> Self

Creates a new AddressSpace instance which contains the given page table pointer and no VMAs

pub unsafe fn new_user_addr_space() -> Self

Create a new address space with a zeroed root page, and copy the kernel mappings into the higher half

Safety

The caller must guarantee that boot stage 2 has already been completed

pub fn page_ptr(&self) -> VirtAddr

Getter for AddressSpace::page_ptr

pub fn vmas(&self) -> &BTreeSet<Vma>

Getter for AddressSpace::vmas

pub fn setup_kernel_vmas( &mut self, boot_mappings: &[BootMapping; 4], ) -> Result<(), VmmError>

Initializes Kernel VMAs on self Do not call this ever, unless you are initializing the kernel’s address space

pub fn insert_vma(&mut self, vma: Vma) -> Result<(), VmmError>

Add a VMA to the AddressSpace

pub fn remove_vma(&mut self, vma_start_addr: VirtAddr) -> Option<Vma>

Remove a VMA from the AddressSpace Returns whether the element to remove existed and could be removed or not

pub fn find_vma(&self, addr: VirtAddr) -> Option<&Vma>

Search for a VMA in the AddressSpace which applies VMA flags to the given VirtAddr Returns a reference to the VMA wrapped in an option incase it is not found

pub fn find_free_range( &self, from: VirtAddr, to: VirtAddr, size: u64, ) -> Option<VirtAddr>

Search for a VMA-free range of size bytes in [from, to) Returns the lowest address where such a range fits, or [None] if such a range couldn’t be found between VMAs