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virt_to_phys.sh also works with nopat

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Ciro Santilli
2017-07-16 11:30:47 +01:00
parent 058c759ec9
commit 2eca9280e1
4 changed files with 9 additions and 8 deletions
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6
kernel_module/user/usermem.c
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@@ -4,7 +4,7 @@ Only tested in x86_64.
Provide an allocated userland memory address for us to test out kernel memory APIs, including:
- /proc/pid/maps
- /proc/pid/pagemap
- /proc/pid/pagemap. See also: https://stackoverflow.com/questions/17021214/decode-proc-pid-pagemap-entry/45126141#45126141
- /dev/mem
Usage:
@@ -18,13 +18,13 @@ Outputs address and pid, e.g.:
Now translate the virtual address to physical for the given PID:
/pagemap2.out 110 | grep 0x600000
/pagemap_dump.out 110 | grep 0x600000
where 0x600000 is the page that contains 0x600800.
This produces a line of type:
0x600000 0x7c7b 0 0 0 1 /pagemap_test.out
0x600000 0x7c7b 0 0 0 1 /usermem.out
where 0x7c7b is the PFN. To get the physical address, just add three zeros back: