bti-1.c (1432B)
1 /* 2 * Branch target identification, basic notskip cases. 3 */ 4 5 #include "bti-crt.inc.c" 6 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 NOP "nop" 14 #define BTI_N "hint #32" 15 #define BTI_C "hint #34" 16 #define BTI_J "hint #36" 17 #define BTI_JC "hint #38" 18 19 #define BTYPE_1(DEST) \ 20 asm("mov %0,#1; adr x16, 1f; br x16; 1: " DEST "; mov %0,#0" \ 21 : "=r"(skipped) : : "x16") 22 23 #define BTYPE_2(DEST) \ 24 asm("mov %0,#1; adr x16, 1f; blr x16; 1: " DEST "; mov %0,#0" \ 25 : "=r"(skipped) : : "x16", "x30") 26 27 #define BTYPE_3(DEST) \ 28 asm("mov %0,#1; adr x15, 1f; br x15; 1: " DEST "; mov %0,#0" \ 29 : "=r"(skipped) : : "x15") 30 31 #define TEST(WHICH, DEST, EXPECT) \ 32 do { WHICH(DEST); fail += skipped ^ EXPECT; } while (0) 33 34 35 int main() 36 { 37 int fail = 0; 38 int skipped; 39 40 /* Signal-like with SA_SIGINFO. */ 41 signal_info(SIGILL, skip2_sigill); 42 43 TEST(BTYPE_1, NOP, 1); 44 TEST(BTYPE_1, BTI_N, 1); 45 TEST(BTYPE_1, BTI_C, 0); 46 TEST(BTYPE_1, BTI_J, 0); 47 TEST(BTYPE_1, BTI_JC, 0); 48 49 TEST(BTYPE_2, NOP, 1); 50 TEST(BTYPE_2, BTI_N, 1); 51 TEST(BTYPE_2, BTI_C, 0); 52 TEST(BTYPE_2, BTI_J, 1); 53 TEST(BTYPE_2, BTI_JC, 0); 54 55 TEST(BTYPE_3, NOP, 1); 56 TEST(BTYPE_3, BTI_N, 1); 57 TEST(BTYPE_3, BTI_C, 1); 58 TEST(BTYPE_3, BTI_J, 0); 59 TEST(BTYPE_3, BTI_JC, 0); 60 61 return fail; 62 }