svn commit: r288671 - head/sys/arm64/arm64

[Andrew Turner]

Author: andrew
Date: Sun Oct  4 21:16:45 2015
New Revision: 288671
URL: https://svnweb.freebsd.org/changeset/base/288671

Log:
  When trying to execute from a misaligned address raise a SIGBUS with the
  invalid address alignment code.
  
  Obtained from:	EuroBSDCon
  Sponsored by:	ABT Systems Ltd

Modified:
  head/sys/arm64/arm64/trap.c

Modified: head/sys/arm64/arm64/trap.c
==============================================================================
--- head/sys/arm64/arm64/trap.c	Sun Oct  4 19:10:27 2015	(r288670)
+++ head/sys/arm64/arm64/trap.c	Sun Oct  4 21:16:45 2015	(r288671)
@@ -377,6 +377,11 @@ do_el0_sync(struct trapframe *frame)
 	case EXCP_UNKNOWN:
 		el0_excp_unknown(frame);
 		break;
+	case EXCP_PC_ALIGN:
+		td = curthread;
+		call_trapsignal(td, SIGBUS, BUS_ADRALN, (void *)frame->tf_elr);
+		userret(td, frame);
+		break;
 	case EXCP_BRK:
 		td = curthread;
 		call_trapsignal(td, SIGTRAP, TRAP_BRKPT, (void *)frame->tf_elr);