fault.cxxm File Reference

page fault handler — core interface. More...

import zxfoundation.base.types;
import zxfoundation.memory.vm.types;

Include dependency graph for fault.cxxm:

Data Structures
struct	zxfoundation::memory::vm::_fault_file_request
	Coordinates of a file-backed miss captured while the VM-space lock is held. More...

Enumerations
enum class	zxfoundation::memory::vm::fault_action : u8 {   resolved = 0 , killed = 1 , guard_hit = 2 , stack_grew = 3 ,   retry = 4 , oom = 5 }
	Outcome of a page fault resolution. More...

Functions
auto	zxfoundation::memory::vm::handle_page_fault (vm_space &space, u64 root_phys, u8 storage_key, u64 fault_va, bool is_write, bool is_exec) noexcept -> fault_action

Detailed Description

page fault handler — core interface.

SPDX-License-Identifier: Apache-2.0

Enumeration Type Documentation

fault_action

enum class zxfoundation::memory::vm::fault_action : u8

exportstrong

Outcome of a page fault resolution.

Enumerator
resolved	Fault resolved — page mapped, resume execution.
killed	Unrecoverable fault — domain must be killed.
guard_hit	Fault on a guard page.
stack_grew	Stack region was extended downward.
retry	Mapping changed concurrently; retry the fault.
oom	Allocation or backing store exhausted.