* config/cris/cris.h (TARGET_HAS_BREAK, TARGET_TRAP_USING_BREAK8):

	New macros.
	* config/cris/cris.md ("trap"): Define, enabled for
	TARGET_TRAP_USING_BREAK8.
	* config/cris/cris.opt (mtrap-using-break8): New option.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@187942 138bc75d-0d04-0410-961f-82ee72b054a4

3 files changed, 17 insertions, 0 deletions

diff --git a/gcc/config/cris/cris.h b/gcc/config/cris/cris.h
index ff0be0041f0..edb5f97e18b 100644
--- a/gcc/config/cris/cris.h
+++ b/gcc/config/cris/cris.h
@@ -302,9 +302,14 @@ extern int cris_cpu_version;
 
 #define TARGET_HAS_MUL_INSNS (cris_cpu_version >= CRIS_CPU_NG)
 #define TARGET_HAS_LZ (cris_cpu_version >= CRIS_CPU_ETRAX4)
+#define TARGET_HAS_BREAK (cris_cpu_version >= CRIS_CPU_ETRAX4)
 #define TARGET_HAS_SWAP (cris_cpu_version >= CRIS_CPU_SVINTO)
 #define TARGET_V32 (cris_cpu_version >= CRIS_CPU_V32)
 
+/* The "break" instruction was introduced with ETRAX 4.  */
+#define TARGET_TRAP_USING_BREAK8 \
+ (cris_trap_using_break8 == 2 ? TARGET_HAS_BREAK : cris_trap_using_break8)
+
 /* Node: Storage Layout */
 
 #define BITS_BIG_ENDIAN 0
diff --git a/gcc/config/cris/cris.md b/gcc/config/cris/cris.md
index b4ead76f38b..49f36e350da 100644
--- a/gcc/config/cris/cris.md
+++ b/gcc/config/cris/cris.md
@@ -3825,6 +3825,14 @@
   ""
   "nop"
   [(set_attr "cc" "none")])
+
+;; Same as the gdb trap breakpoint, will cause a SIGTRAP for
+;; cris-linux* and crisv32-linux*, as intended.  Will work in
+;; freestanding environments with sufficient framework.
+(define_insn "trap"
+  [(trap_if (const_int 1) (const_int 8))]
+  "TARGET_TRAP_USING_BREAK8"
+  "break 8")
 
 ;; We need to stop accesses to the stack after the memory is
 ;; deallocated.  Unfortunately, reorg doesn't look at naked clobbers,
diff --git a/gcc/config/cris/cris.opt b/gcc/config/cris/cris.opt
index dc4ab57f010..3c2e338ffee 100644
--- a/gcc/config/cris/cris.opt
+++ b/gcc/config/cris/cris.opt
@@ -175,6 +175,10 @@ Target Report RejectNegative Joined Var(cris_max_stackframe_str)
 max-stackframe=
 Target Report RejectNegative Joined Undocumented Var(cris_max_stackframe_str)
 
+mtrap-using-break8
+Target Report Var(cris_trap_using_break8) Init(2)
+Emit traps as \"break 8\", default for CRIS v3 and up.  If disabled, calls to abort() are used.
+
 ; TARGET_SVINTO: Currently this just affects alignment.  FIXME:
 ; Redundant with TARGET_ALIGN_BY_32, or put machine stuff here?
 ; This and the others below could just as well be variables and