mirror of
https://github.com/cirosantilli/linux-kernel-module-cheat.git
synced 2026-01-13 20:12:26 +00:00
33 lines
855 B
C
33 lines
855 B
C
/*
|
|
Convert a virtual address to physical for a given process PID using /proc/PID/pagemap.
|
|
|
|
https://stackoverflow.com/questions/5748492/is-there-any-api-for-determining-the-physical-address-from-virtual-address-in-li/45128487#45128487
|
|
|
|
Test this out with usermem.c.
|
|
*/
|
|
|
|
#define _XOPEN_SOURCE 700
|
|
#include <stdio.h> /* printf */
|
|
#include <stdlib.h> /* EXIT_SUCCESS, EXIT_FAILURE, strtoull */
|
|
|
|
#include "common.h" /* virt_to_phys_user */
|
|
|
|
int main(int argc, char **argv)
|
|
{
|
|
pid_t pid;
|
|
uintptr_t vaddr, paddr = 0;
|
|
|
|
if (argc < 3) {
|
|
printf("Usage: %s pid vaddr\n", argv[0]);
|
|
return EXIT_FAILURE;
|
|
}
|
|
pid = strtoull(argv[1], NULL, 0);
|
|
vaddr = strtoull(argv[2], NULL, 0);
|
|
if (virt_to_phys_user(&paddr, pid, vaddr)) {
|
|
fprintf(stderr, "error: virt_to_phys_user\n");
|
|
return EXIT_FAILURE;
|
|
};
|
|
printf("0x%jx\n", (uintmax_t)paddr);
|
|
return EXIT_SUCCESS;
|
|
}
|