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22 lines
457 B
C
22 lines
457 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 <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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enum { I0 = 0x12345678 };
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static volatile uint32_t i = I0;
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int main(void) {
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printf("vaddr %p\n", (void *)&i);
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printf("pid %ju\n", (uintmax_t)getpid());
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while (i == I0) {
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sleep(1);
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}
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printf("i %jx\n", (uintmax_t)i);
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return EXIT_SUCCESS;
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}
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