Module mem

Functionality to establish and manage an individual sandbox’s memory.

The following structs are not used other than to calculate the size of the memory needed and also to illustrate the layout of the memory:

• HostFunctionDefinitions
• HostExceptionData
• GuestError
• CodeAndOutBPointers
• InputData
• OutputData
• GuestHeap
• GuestStack

the start of the guest memory contains the page tables and is always located at the Virtual Address 0x00200000 when running in a Hypervisor:

Virtual Address

0x200000 PML4 0x201000 PDPT 0x202000 PD 0x203000 The guest PE code (When the code has been loaded using LoadLibrary to debug the guest this will not be present and code length will be zero;

The pointer passed to the Entrypoint in the Guest application is the 0x200000 + size of page table + size of code, at this address structs below are laid out in this order

Modules

layout

Functionality to establish a sandbox’s memory layout.

memory_region

memory regions to be mapped inside a vm

mgr

Functionality that wraps a SandboxMemoryLayout and a SandboxMemoryConfig to mutate a sandbox’s memory as necessary.

ptr

Structures to represent pointers into guest and host memory

ptr_offset

Structures to represent an offset into a memory space

shared_mem

A wrapper around unsafe functionality to create and initialize a memory region for a guest running in a sandbox.

shared_mem_snapshot

A wrapper around a SharedMemory and a snapshot in time of the memory therein