target-arm: Wire up HLT 0xf000 as the A64 semihosting instruction

For the A64 instruction set, the semihosting call instruction
is 'HLT 0xf000'. Wire this up to call do_arm_semihosting()
if semihosting is enabled.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Christopher Covington <christopher.covington@linaro.org>
Tested-by: Christopher Covington <cov@codeaurora.org>
Message-id: 1439483745-28752-10-git-send-email-peter.maydell@linaro.org

1 files changed, 6 insertions, 0 deletions

diff --git a/target-arm/helper-a64.c b/target-arm/helper-a64.c
index 08c95a3..02fc9b4 100644
--- a/target-arm/helper-a64.c
+++ b/target-arm/helper-a64.c
@@ -514,6 +514,12 @@ void aarch64_cpu_do_interrupt(CPUState *cs)
     case EXCP_VFIQ:
         addr += 0x100;
         break;
+    case EXCP_SEMIHOST:
+        qemu_log_mask(CPU_LOG_INT,
+                      "...handling as semihosting call 0x%" PRIx64 "\n",
+                      env->xregs[0]);
+        env->xregs[0] = do_arm_semihosting(env);
+        return;
     default:
         cpu_abort(cs, "Unhandled exception 0x%x\n", cs->exception_index);
     }