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| // SPDX-License-Identifier: GPL-2.0
|
| #include <stdio.h>
| #include <stdlib.h>
| #include <unistd.h>
| #include <stdint.h>
| #include <sys/prctl.h>
| #include <sys/utsname.h>
|
| #define SHIFT_TAG(tag) ((uint64_t)(tag) << 56)
| #define SET_TAG(ptr, tag) (((uint64_t)(ptr) & ~SHIFT_TAG(0xff)) | \
| SHIFT_TAG(tag))
|
| int main(void)
| {
| static int tbi_enabled = 0;
| unsigned long tag = 0;
| struct utsname *ptr;
| int err;
|
| if (prctl(PR_SET_TAGGED_ADDR_CTRL, PR_TAGGED_ADDR_ENABLE, 0, 0, 0) == 0)
| tbi_enabled = 1;
| ptr = (struct utsname *)malloc(sizeof(*ptr));
| if (tbi_enabled)
| tag = 0x42;
| ptr = (struct utsname *)SET_TAG(ptr, tag);
| err = uname(ptr);
| free(ptr);
|
| return err;
| }
|
|
