mirror of
https://github.com/cirosantilli/linux-kernel-module-cheat.git
synced 2026-01-23 10:15:57 +01:00
26b890f42f
This allows add.c to run unmodified on both! For that to work, use int main on baremetal, and pass the return value to the final exit.
27 lines
698 B
C
27 lines
698 B
C
/* https://github.com/cirosantilli/linux-kernel-module-cheat#userland-physical-address-experiments */
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#define _XOPEN_SOURCE 700
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#include <stdio.h> /* printf */
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#include <stdlib.h> /* EXIT_SUCCESS, EXIT_FAILURE, strtoull */
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#include "common_userland.h" /* virt_to_phys_user */
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int main(int argc, char **argv)
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{
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pid_t pid;
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uintptr_t vaddr, paddr = 0;
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if (argc < 3) {
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printf("Usage: %s pid vaddr\n", argv[0]);
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return EXIT_FAILURE;
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}
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pid = strtoull(argv[1], NULL, 0);
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vaddr = strtoull(argv[2], NULL, 0);
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if (virt_to_phys_user(&paddr, pid, vaddr)) {
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fprintf(stderr, "error: virt_to_phys_user\n");
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return EXIT_FAILURE;
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};
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printf("0x%jx\n", (uintmax_t)paddr);
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return EXIT_SUCCESS;
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}
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