LXR qemu/tests/tcg/aarch64/bti-3.c

   1/*
   2 * BTI vs PACIASP
   3 */
   4
   5#include "bti-crt.inc.c"
   6
   7static 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 %0,#1; adr x16, 1f; br x16; 1: hint #25; mov %0,#0" \
  15        : "=r"(skipped) : : "x16", "x30")
  16
  17#define BTYPE_2() \
  18    asm("mov %0,#1; adr x16, 1f; blr x16; 1: hint #25; mov %0,#0" \
  19        : "=r"(skipped) : : "x16", "x30")
  20
  21#define BTYPE_3() \
  22    asm("mov %0,#1; adr x15, 1f; br x15; 1: hint #25; mov %0,#0" \
  23        : "=r"(skipped) : : "x15", "x30")
  24
  25#define TEST(WHICH, EXPECT) \
  26    do { WHICH(); fail += skipped ^ EXPECT; } while (0)
  27
  28int 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