wangxiaoq/dump-phys-addr

The module is used to dump all the physical addresses(page frames) used by a process. It takes a command line parameter to specify which process to dump.

Dump Physical Address of A Process

Wang Xiaoqiang[email protected] Distributed & Embedded System Lab DSLab

The module is used to dump all the physical addresses(page frames) used by a process. It taskes a command line parameter to specified which process to dump.

Usage

    1. make
    2. sudo insmod dump-phys.ko task_name="your_process_name"
    3. dmesg
    4. make uninstall

Example

For the step 2. we can give a example:

sudo insmod dump-phys.ko task_name="init"

The command above dumps the physical addresses of process "init". Then use:

dmesg

Part of the output is as follows:

[72240.260786] linear address: 0xb7552000, physical address: not alloc
[72240.260790] linear address: 0xb7553000, physical address: 0x7e7ce000
[72240.260794] linear address: 0xb7554000, physical address: 0x7e7cf000
[72240.260797] linear address: 0xb7555000, physical address: not alloc
[72240.260801] linear address: 0xb7556000, physical address: not alloc
[72240.260805] linear address: 0xb7557000, physical address: not alloc
[72240.260808] linear address: 0xb7558000, physical address: not alloc
[72240.260812] linear address: 0xb7559000, physical address: not alloc
[72240.260816] linear address: 0xb755a000, physical address: not alloc
[72240.260820] linear address: 0xb755b000, physical address: 0x7dc96000
[72240.260823] linear address: 0xb755c000, physical address: not alloc
[72240.260827] linear address: 0xb755d000, physical address: not alloc
[72240.260831] linear address: 0xb755e000, physical address: 0x7e409000
[72240.260835] linear address: 0xb755f000, physical address: 0x7e40a000

Each item in the output represents a pair of page and page frame addresses.

LICENSE

This program is under the license of GPL v2.