1 /*
2 * BTI vs PACIASP
3 */
4
5 #include "bti-crt.c.inc"
6
skip2_sigill(int sig,siginfo_t * info,ucontext_t * uc)7 static void skip2_sigill(int sig, siginfo_t *info, ucontext_t *uc)
8 {
9 uc->uc_mcontext.pc += 8;
10 uc->uc_mcontext.pstate = 1;
11 }
12
13 #define BTYPE_1() \
14 asm("mov %w0,#1; adr x16, 1f; br x16; 1: hint #25; mov %w0,#0" \
15 : "=r"(skipped) : : "x16", "x30")
16
17 #define BTYPE_2() \
18 asm("mov %w0,#1; adr x16, 1f; blr x16; 1: hint #25; mov %w0,#0" \
19 : "=r"(skipped) : : "x16", "x30")
20
21 #define BTYPE_3() \
22 asm("mov %w0,#1; adr x15, 1f; br x15; 1: hint #25; mov %w0,#0" \
23 : "=r"(skipped) : : "x15", "x30")
24
25 #define TEST(WHICH, EXPECT) \
26 do { WHICH(); fail += skipped ^ EXPECT; } while (0)
27
main()28 int main()
29 {
30 int fail = 0;
31 int skipped;
32
33 /* Signal-like with SA_SIGINFO. */
34 signal_info(SIGILL, skip2_sigill);
35
36 /* With SCTLR_EL1.BT0 set, PACIASP is not compatible with type=3. */
37 TEST(BTYPE_1, 0);
38 TEST(BTYPE_2, 0);
39 TEST(BTYPE_3, 1);
40
41 return fail;
42 }
43