FS_SysInfo_Memory

The sys/memory directory

The directory sys/memory exists as a sub-directory to the file system root.

The directory contains information related to physical memory and its usage.

The files in the sys/memory directory are listed in the table below:

File	Description
memory/pfndbaddr.txt	virtual address of the PFN database.
memory/pfndb.txt	short information about each PFN.
memory/physmemmap.txt	physical memory map as interpreted by Windows registry.

Files in the sys/memory directory are read-only.

File: pfndb.txt

The file pfndb.txt contains information from the Windows page frame number (PFN) database. Each PFN denotes one 0x1000 (4096) byte physical memory page. For memory mapped as process private the process PID is shown. The flags are as following: [Priority 0-7][Modified M/-][Prototype P/-]. Also the corresponding virtual address is shown if it can be derived.

PFN#     PID TYPE    SUBTYPE    FLAG  VIRTUALADDRESS
====================================================
2be54      0 Active  File       7-P                0
2be55      0 Active  File       7-P                0
2be56   3908 Active  ProcPriv   5M-     7ff836d72000
2be57   2828 Active  ProcPriv   5M-      20d24013000
...

Example

The example shows the sys/memory directory with the physical memory map and select entries from the page frame number (PFN) database describing physical memory pages.

For Developers

The sys/memory sub-directory is implemented as a built-in native C-code plugin. The plugin source is located in the file modules/m_sys_mem.c in the vmm project.