1*eb42297aSRichard Henderson #include "mte.h"
2*eb42297aSRichard Henderson
pass(int sig,siginfo_t * info,void * uc)3*eb42297aSRichard Henderson void pass(int sig, siginfo_t *info, void *uc)
4*eb42297aSRichard Henderson {
5*eb42297aSRichard Henderson assert(info->si_code == SEGV_MTESERR);
6*eb42297aSRichard Henderson exit(0);
7*eb42297aSRichard Henderson }
8*eb42297aSRichard Henderson
main(void)9*eb42297aSRichard Henderson int main(void)
10*eb42297aSRichard Henderson {
11*eb42297aSRichard Henderson enable_mte(PR_MTE_TCF_SYNC);
12*eb42297aSRichard Henderson
13*eb42297aSRichard Henderson void *brk = sbrk(16);
14*eb42297aSRichard Henderson if (brk == (void *)-1) {
15*eb42297aSRichard Henderson perror("sbrk");
16*eb42297aSRichard Henderson return 2;
17*eb42297aSRichard Henderson }
18*eb42297aSRichard Henderson
19*eb42297aSRichard Henderson if (mprotect(brk, 16, PROT_READ | PROT_WRITE | PROT_MTE)) {
20*eb42297aSRichard Henderson perror("mprotect");
21*eb42297aSRichard Henderson return 2;
22*eb42297aSRichard Henderson }
23*eb42297aSRichard Henderson
24*eb42297aSRichard Henderson int *p1, *p2;
25*eb42297aSRichard Henderson long excl = 1;
26*eb42297aSRichard Henderson
27*eb42297aSRichard Henderson asm("irg %0,%1,%2" : "=r"(p1) : "r"(brk), "r"(excl));
28*eb42297aSRichard Henderson asm("gmi %0,%1,%0" : "+r"(excl) : "r"(p1));
29*eb42297aSRichard Henderson asm("irg %0,%1,%2" : "=r"(p2) : "r"(brk), "r"(excl));
30*eb42297aSRichard Henderson asm("stg %0,[%0]" : : "r"(p1));
31*eb42297aSRichard Henderson
32*eb42297aSRichard Henderson *p1 = 0;
33*eb42297aSRichard Henderson
34*eb42297aSRichard Henderson struct sigaction sa;
35*eb42297aSRichard Henderson memset(&sa, 0, sizeof(sa));
36*eb42297aSRichard Henderson sa.sa_sigaction = pass;
37*eb42297aSRichard Henderson sa.sa_flags = SA_SIGINFO;
38*eb42297aSRichard Henderson sigaction(SIGSEGV, &sa, NULL);
39*eb42297aSRichard Henderson
40*eb42297aSRichard Henderson *p2 = 0;
41*eb42297aSRichard Henderson
42*eb42297aSRichard Henderson abort();
43*eb42297aSRichard Henderson }
44