diff mbox

[6/7,ARM,V8M] ARMv8-M Security Extension's cmse_nonsecure_call: use __gnu_cmse_nonsecure_call

Message ID 57961383.7090709@arm.com
State New
Headers show

Commit Message

Andre Vieira (lists) July 25, 2016, 1:26 p.m. UTC
This patch extends support for the ARMv8-M Security Extensions
'cmse_nonsecure_call' to use a new library function
'__gnu_cmse_nonsecure_call'. This library function is responsible for
(without using r0-r3 or d0-d7):
1) saving and clearing all callee-saved registers using the secure stack
2) clearing the LSB of the address passed in r4 and using blxns to
'jump' to it
3) clearing ASPR, including the 'ge bits' if DSP is enabled
4) clearing FPSCR if using non-soft float-abi
5) restoring callee-saved registers.

The decisions whether to include DSP 'ge bits' clearing and floating
point registers (single/double precision) all depends on the multilib used.

See Section 5.5 of ARMĀ®v8-M Security Extensions
(http://infocenter.arm.com/help/topic/com.arm.doc.ecm0359818/index.html).

*** gcc/ChangeLog ***
2016-07-25  Andre Vieira        <andre.simoesdiasvieira@arm.com>
            Thomas Preud'homme  <thomas.preudhomme@arm.com>

        * config/arm/arm.c (detect_cmse_nonsecure_call): New.
        (cmse_nonsecure_call_clear_caller_saved): New.
        (arm_reorg): Use cmse_nonsecure_call_clear_caller_saved.
        * config/arm/arm-protos.h (detect_cmse_nonsecure_call): New.
        * config/arm/arm.md (call): Handle cmse_nonsecure_entry.
        (call_value): Likewise.
        (nonsecure_call_internal): New.
        (nonsecure_call_value_internal): New.
        * config/arm/thumb1.md (*nonsecure_call_reg_thumb1_v5): New.
        (*nonsecure_call_value_reg_thumb1_v5): New.
        * config/arm/thumb2.md (*nonsecure_call_reg_thumb2): New.
        (*nonsecure_call_value_reg_thumb2): New.
        * config/arm/unspecs.md (UNSPEC_NONSECURE_MEM): New.

*** libgcc/ChangeLog ***
2016-07-25  Andre Vieira        <andre.simoesdiasvieira@arm.com>
            Thomas Preud'homme  <thomas.preudhomme@arm.com>

        * config/arm/cmse_nonsecure_call.S: New.
	* config/arm/t-arm: Compile cmse_nonsecure_call.S


*** gcc/testsuite/ChangeLog ***
2016-07-25  Andre Vieira        <andre.simoesdiasvieira@arm.com>
            Thomas Preud'homme  <thomas.preudhomme@arm.com>

        * gcc.target/arm/cmse/cmse.exp: Run tests in mainline dir.
        * gcc.target/arm/cmse/cmse-9.c: Added some extra tests.
        * gcc.target/arm/cmse/baseline/bitfield-4.c: New.
        * gcc.target/arm/cmse/baseline/bitfield-5.c: New.
        * gcc.target/arm/cmse/baseline/bitfield-6.c: New.
        * gcc.target/arm/cmse/baseline/bitfield-7.c: New.
        * gcc.target/arm/cmse/baseline/bitfield-8.c: New.
        * gcc.target/arm/cmse/baseline/bitfield-9.c: New.
        * gcc.target/arm/cmse/baseline/bitfield-and-union-1.c: New.
        * gcc.target/arm/cmse/baseline/cmse-11.c: New.
	* gcc.target/arm/cmse/baseline/cmse-13.c: New.
	* gcc.target/arm/cmse/baseline/cmse-6.c: New.
        * gcc/testsuite/gcc.target/arm/cmse/baseline/union-1.c: New.
        * gcc/testsuite/gcc.target/arm/cmse/baseline/union-2.c: New.
	* gcc.target/arm/cmse/mainline/hard-sp/cmse-13.c: New.
	* gcc.target/arm/cmse/mainline/hard-sp/cmse-7.c: New.
	* gcc.target/arm/cmse/mainline/hard-sp/cmse-8.c: New.
	* gcc.target/arm/cmse/mainline/hard/cmse-13.c: New.
	* gcc.target/arm/cmse/mainline/hard/cmse-7.c: New.
	* gcc.target/arm/cmse/mainline/hard/cmse-8.c: New.
	* gcc.target/arm/cmse/mainline/soft/cmse-13.c: New.
	* gcc.target/arm/cmse/mainline/soft/cmse-7.c: New.
	* gcc.target/arm/cmse/mainline/soft/cmse-8.c: New.
	* gcc.target/arm/cmse/mainline/softfp-sp/cmse-7.c: New.
	* gcc.target/arm/cmse/mainline/softfp-sp/cmse-8.c: New.
	* gcc.target/arm/cmse/mainline/softfp/cmse-13.c: New.
	* gcc.target/arm/cmse/mainline/softfp/cmse-7.c: New.
	* gcc.target/arm/cmse/mainline/softfp/cmse-8.c: New.
diff mbox

Patch

diff --git a/gcc/config/arm/arm-protos.h b/gcc/config/arm/arm-protos.h
index 1d2e35b52f631570450b6c8eaf077e18e9b99203..e7e223f7a932163cba8beeb76c10b4c90eae9234 100644
--- a/gcc/config/arm/arm-protos.h
+++ b/gcc/config/arm/arm-protos.h
@@ -133,6 +133,7 @@  extern int arm_const_double_inline_cost (rtx);
 extern bool arm_const_double_by_parts (rtx);
 extern bool arm_const_double_by_immediates (rtx);
 extern void arm_emit_call_insn (rtx, rtx, bool);
+bool detect_cmse_nonsecure_call (tree);
 extern const char *output_call (rtx *);
 void arm_emit_movpair (rtx, rtx);
 extern const char *output_mov_long_double_arm_from_arm (rtx *);
diff --git a/gcc/config/arm/arm.c b/gcc/config/arm/arm.c
index 128baae92e4b65507eb18b679874b1ad24ca7c4a..fd0bc10083026ce544bf56244ce0eb740295e5d3 100644
--- a/gcc/config/arm/arm.c
+++ b/gcc/config/arm/arm.c
@@ -17822,6 +17822,197 @@  compute_not_to_clear_mask (tree arg_type, rtx arg_rtx, int regno,
   return not_to_clear_mask;
 }
 
+/* Saves callee saved registers, clears callee saved registers and caller saved
+   registers not used to pass arguments before a cmse_nonsecure_call.  And
+   restores the callee saved registers after.  */
+
+static void
+cmse_nonsecure_call_clear_caller_saved (void)
+{
+  basic_block bb;
+
+  FOR_EACH_BB_FN (bb, cfun)
+    {
+      rtx_insn *insn;
+
+      FOR_BB_INSNS (bb, insn)
+	{
+	  uint64_t to_clear_mask, float_mask;
+	  rtx_insn *seq;
+	  rtx pat, call, unspec, reg, cleared_reg, tmp;
+	  unsigned int regno, maxregno;
+	  rtx address;
+	  CUMULATIVE_ARGS args_so_far_v;
+	  cumulative_args_t args_so_far;
+	  tree arg_type, fntype;
+	  bool using_r4, first_param = true;
+	  function_args_iterator args_iter;
+	  uint32_t padding_bits_to_clear[4] = {0U, 0U, 0U, 0U};
+	  uint32_t * padding_bits_to_clear_ptr = &padding_bits_to_clear[0];
+
+	  if (!NONDEBUG_INSN_P (insn))
+	    continue;
+
+	  if (!CALL_P (insn))
+	    continue;
+
+	  pat = PATTERN (insn);
+	  gcc_assert (GET_CODE (pat) == PARALLEL && XVECLEN (pat, 0) > 0);
+	  call = XVECEXP (pat, 0, 0);
+
+	  /* Get the real call RTX if the insn sets a value, ie. returns.  */
+	  if (GET_CODE (call) == SET)
+	      call = SET_SRC (call);
+
+	  /* Check if it is a cmse_nonsecure_call.  */
+	  unspec = XEXP (call, 0);
+	  if (GET_CODE (unspec) != UNSPEC
+	      || XINT (unspec, 1) != UNSPEC_NONSECURE_MEM)
+	    continue;
+
+	  /* Determine the caller-saved registers we need to clear.  */
+	  to_clear_mask = (1LL << (NUM_ARG_REGS)) - 1;
+	  maxregno = NUM_ARG_REGS - 1;
+	  /* Only look at the caller-saved floating point registers in case of
+	     -mfloat-abi=hard.  For -mfloat-abi=softfp we will be using the
+	     lazy store and loads which clear both caller- and callee-saved
+	     registers.  */
+	  if (TARGET_HARD_FLOAT_ABI && TARGET_VFP)
+	    {
+	      float_mask = (1LL << (D7_VFP_REGNUM + 1)) - 1;
+	      float_mask &= ~((1LL << FIRST_VFP_REGNUM) - 1);
+	      to_clear_mask |= float_mask;
+	      maxregno = D7_VFP_REGNUM;
+	    }
+
+	  /* Make sure the register used to hold the function address is not
+	     cleared.  */
+	  address = RTVEC_ELT (XVEC (unspec, 0), 0);
+	  gcc_assert (MEM_P (address));
+	  gcc_assert (REG_P (XEXP (address, 0)));
+	  to_clear_mask &= ~(1LL << REGNO (XEXP (address, 0)));
+
+	  /* Set basic block of call insn so that df rescan is performed on
+	     insns inserted here.  */
+	  set_block_for_insn (insn, bb);
+	  df_set_flags (DF_DEFER_INSN_RESCAN);
+	  start_sequence ();
+
+	  /* Make sure the scheduler doesn't schedule other insns beyond
+	     here.  */
+	  emit_insn (gen_blockage ());
+
+	  /* Walk through all arguments and clear registers appropriately.
+	  */
+	  fntype = TREE_TYPE (MEM_EXPR (address));
+	  arm_init_cumulative_args (&args_so_far_v, fntype, NULL_RTX,
+				    NULL_TREE);
+	  args_so_far = pack_cumulative_args (&args_so_far_v);
+	  FOREACH_FUNCTION_ARGS (fntype, arg_type, args_iter)
+	    {
+	      rtx arg_rtx;
+	      machine_mode arg_mode = TYPE_MODE (arg_type);
+
+	      if (VOID_TYPE_P (arg_type))
+		continue;
+
+	      if (!first_param)
+		arm_function_arg_advance (args_so_far, arg_mode, arg_type,
+					  true);
+
+	      arg_rtx = arm_function_arg (args_so_far, arg_mode, arg_type,
+					  true);
+	      gcc_assert (REG_P (arg_rtx));
+	      to_clear_mask &=
+		~compute_not_to_clear_mask (arg_type, arg_rtx,
+					      REGNO (arg_rtx),
+					      padding_bits_to_clear_ptr);
+
+	      first_param = false;
+	    }
+
+	  /* Clear padding bits where needed.  */
+	  cleared_reg = XEXP (address, 0);
+	  reg = gen_rtx_REG (SImode, IP_REGNUM);
+	  using_r4 = false;
+	  for (regno = 0; regno < NUM_ARG_REGS; regno++)
+	    {
+	      if (padding_bits_to_clear[regno] == 0)
+		continue;
+
+	      /* If this is a Thumb-1 target copy the address of the function
+		 we are calling from 'r4' into 'ip' such that we can use r4 to
+		 clear the unused bits in the arguments.  */
+	      if (TARGET_THUMB1 && !using_r4)
+		{
+		  using_r4 =  true;
+		  reg = cleared_reg;
+		  emit_move_insn (gen_rtx_REG (SImode, IP_REGNUM),
+					  reg);
+		}
+
+	      tmp = GEN_INT ((((~padding_bits_to_clear[regno]) << 16u) >> 16u));
+	      emit_move_insn (reg, tmp);
+	      /* Also fill the top half of the negated
+		 padding_bits_to_clear.  */
+	      if (((~padding_bits_to_clear[regno]) >> 16) > 0)
+		{
+		  tmp = GEN_INT ((~padding_bits_to_clear[regno]) >> 16);
+		  emit_insn (gen_rtx_SET (gen_rtx_ZERO_EXTRACT (SImode, reg,
+								GEN_INT (16),
+								GEN_INT (16)),
+					  tmp));
+		}
+
+	      emit_insn (gen_andsi3 (gen_rtx_REG (SImode, regno),
+				     gen_rtx_REG (SImode, regno),
+				     reg));
+
+	    }
+	  if (using_r4)
+	    emit_move_insn (cleared_reg,
+			    gen_rtx_REG (SImode, IP_REGNUM));
+
+	  /* We use right shift and left shift to clear the LSB of the address
+	     we jump to instead of using bic, to avoid having to use an extra
+	     register on Thumb-1.  */
+	  tmp = gen_rtx_LSHIFTRT (SImode, cleared_reg, const1_rtx);
+	  emit_insn (gen_rtx_SET (cleared_reg, tmp));
+	  tmp = gen_rtx_ASHIFT (SImode, cleared_reg, const1_rtx);
+	  emit_insn (gen_rtx_SET (cleared_reg, tmp));
+
+	  /* Clearing all registers that leak before doing a non-secure
+	     call.  */
+	  for (regno = 0; regno <= maxregno; regno++)
+	    {
+	      if (!(to_clear_mask & (1LL << regno)))
+		continue;
+
+	      /* If regno is an even vfp register and its successor is also to
+		 be cleared, use vmov.  */
+	      if (IS_VFP_REGNUM (regno))
+		{
+		  if (TARGET_VFP_DOUBLE
+		      && VFP_REGNO_OK_FOR_DOUBLE (regno)
+		      && to_clear_mask & (1LL << (regno + 1)))
+		    emit_move_insn (gen_rtx_REG (DFmode, regno++),
+				    CONST1_RTX (DFmode));
+		  else
+		    emit_move_insn (gen_rtx_REG (SFmode, regno),
+				    CONST1_RTX (SFmode));
+		}
+	      else
+		emit_move_insn (gen_rtx_REG (SImode, regno), cleared_reg);
+	    }
+
+	  seq = get_insns ();
+	  end_sequence ();
+	  emit_insn_before (seq, insn);
+
+	}
+    }
+}
+
 /* Rewrite move insn into subtract of 0 if the condition codes will
    be useful in next conditional jump insn.  */
 
@@ -18122,6 +18313,8 @@  arm_reorg (void)
   HOST_WIDE_INT address = 0;
   Mfix * fix;
 
+  if (use_cmse)
+    cmse_nonsecure_call_clear_caller_saved ();
   if (TARGET_THUMB1)
     thumb1_reorg ();
   else if (TARGET_THUMB2)
@@ -18494,6 +18687,23 @@  vfp_emit_fstmd (int base_reg, int count)
   return count * 8;
 }
 
+/* Returns true if -mcmse has been passed and the function pointed to by 'addr'
+   has the cmse_nonsecure_call attribute and returns false otherwise.  */
+
+bool
+detect_cmse_nonsecure_call (tree addr)
+{
+  if (!addr)
+    return FALSE;
+
+  tree fntype = TREE_TYPE (addr);
+  if (use_cmse && lookup_attribute ("cmse_nonsecure_call",
+				    TYPE_ATTRIBUTES (fntype)))
+    return TRUE;
+  return FALSE;
+}
+
+
 /* Emit a call instruction with pattern PAT.  ADDR is the address of
    the call target.  */
 
diff --git a/gcc/config/arm/arm.md b/gcc/config/arm/arm.md
index 820471556efbac6b35d46a03fb763cbd30bea30f..3e0d5097938871b1219ed2c426271be55a004950 100644
--- a/gcc/config/arm/arm.md
+++ b/gcc/config/arm/arm.md
@@ -7640,6 +7640,7 @@ 
   "
   {
     rtx callee, pat;
+    tree addr = MEM_EXPR (operands[0]);
     
     /* In an untyped call, we can get NULL for operand 2.  */
     if (operands[2] == NULL_RTX)
@@ -7654,8 +7655,17 @@ 
 	: !REG_P (callee))
       XEXP (operands[0], 0) = force_reg (Pmode, callee);
 
-    pat = gen_call_internal (operands[0], operands[1], operands[2]);
-    arm_emit_call_insn (pat, XEXP (operands[0], 0), false);
+    if (detect_cmse_nonsecure_call (addr))
+      {
+	pat = gen_nonsecure_call_internal (operands[0], operands[1],
+					   operands[2]);
+	emit_call_insn (pat);
+      }
+    else
+      {
+	pat = gen_call_internal (operands[0], operands[1], operands[2]);
+	arm_emit_call_insn (pat, XEXP (operands[0], 0), false);
+      }
     DONE;
   }"
 )
@@ -7666,6 +7676,24 @@ 
 	      (use (match_operand 2 "" ""))
 	      (clobber (reg:SI LR_REGNUM))])])
 
+(define_expand "nonsecure_call_internal"
+  [(parallel [(call (unspec:SI [(match_operand 0 "memory_operand" "")]
+			       UNSPEC_NONSECURE_MEM)
+		    (match_operand 1 "general_operand" ""))
+	      (use (match_operand 2 "" ""))
+	      (clobber (reg:SI LR_REGNUM))
+	      (clobber (reg:SI 4))])]
+  "use_cmse"
+  "
+  {
+    rtx tmp;
+    tmp = copy_to_suggested_reg (XEXP (operands[0], 0),
+				 gen_rtx_REG (SImode, 4),
+				 SImode);
+
+    operands[0] = replace_equiv_address (operands[0], tmp);
+  }")
+
 (define_insn "*call_reg_armv5"
   [(call (mem:SI (match_operand:SI 0 "s_register_operand" "r"))
          (match_operand 1 "" ""))
@@ -7701,6 +7729,7 @@ 
   "
   {
     rtx pat, callee;
+    tree addr = MEM_EXPR (operands[1]);
     
     /* In an untyped call, we can get NULL for operand 2.  */
     if (operands[3] == 0)
@@ -7715,9 +7744,18 @@ 
 	: !REG_P (callee))
       XEXP (operands[1], 0) = force_reg (Pmode, callee);
 
-    pat = gen_call_value_internal (operands[0], operands[1],
-				   operands[2], operands[3]);
-    arm_emit_call_insn (pat, XEXP (operands[1], 0), false);
+    if (detect_cmse_nonsecure_call (addr))
+      {
+	pat = gen_nonsecure_call_value_internal (operands[0], operands[1],
+						 operands[2], operands[3]);
+	emit_call_insn (pat);
+      }
+    else
+      {
+	pat = gen_call_value_internal (operands[0], operands[1],
+				       operands[2], operands[3]);
+	arm_emit_call_insn (pat, XEXP (operands[1], 0), false);
+      }
     DONE;
   }"
 )
@@ -7729,6 +7767,25 @@ 
 	      (use (match_operand 3 "" ""))
 	      (clobber (reg:SI LR_REGNUM))])])
 
+(define_expand "nonsecure_call_value_internal"
+  [(parallel [(set (match_operand       0 "" "")
+		   (call (unspec:SI [(match_operand 1 "memory_operand" "")]
+				    UNSPEC_NONSECURE_MEM)
+			 (match_operand 2 "general_operand" "")))
+	      (use (match_operand 3 "" ""))
+	      (clobber (reg:SI LR_REGNUM))
+	      (clobber (reg:SI 4))])]
+  "use_cmse"
+  "
+  {
+    rtx tmp;
+    tmp = copy_to_suggested_reg (XEXP (operands[1], 0),
+				 gen_rtx_REG (SImode, 4),
+				 SImode);
+
+    operands[1] = replace_equiv_address (operands[1], tmp);
+  }")
+
 (define_insn "*call_value_reg_armv5"
   [(set (match_operand 0 "" "")
         (call (mem:SI (match_operand:SI 1 "s_register_operand" "r"))
diff --git a/gcc/config/arm/thumb1.md b/gcc/config/arm/thumb1.md
index c3d4b4e71193ce347f1e8a931b66705619d9b0c5..643b0ec35b260d49ffba3df5fd94b33c17ad85c3 100644
--- a/gcc/config/arm/thumb1.md
+++ b/gcc/config/arm/thumb1.md
@@ -1705,6 +1705,19 @@ 
    (set_attr "type" "call")]
 )
 
+(define_insn "*nonsecure_call_reg_thumb1_v5"
+  [(call (unspec:SI [(mem:SI (match_operand:SI 0 "register_operand" "l*r"))]
+		    UNSPEC_NONSECURE_MEM)
+	 (match_operand 1 "" ""))
+   (use (match_operand 2 "" ""))
+   (clobber (reg:SI LR_REGNUM))
+   (clobber (match_dup 0))]
+  "TARGET_THUMB1 && use_cmse && !SIBLING_CALL_P (insn)"
+  "bl\\t__gnu_cmse_nonsecure_call"
+  [(set_attr "length" "4")
+   (set_attr "type" "call")]
+)
+
 (define_insn "*call_reg_thumb1"
   [(call (mem:SI (match_operand:SI 0 "register_operand" "l*r"))
 	 (match_operand 1 "" ""))
@@ -1737,6 +1750,21 @@ 
    (set_attr "type" "call")]
 )
 
+(define_insn "*nonsecure_call_value_reg_thumb1_v5"
+  [(set (match_operand 0 "" "")
+	(call (unspec:SI
+	       [(mem:SI (match_operand:SI 1 "register_operand" "l*r"))]
+	       UNSPEC_NONSECURE_MEM)
+	      (match_operand 2 "" "")))
+   (use (match_operand 3 "" ""))
+   (clobber (reg:SI LR_REGNUM))
+   (clobber (match_dup 1))]
+  "TARGET_THUMB1 && use_cmse"
+  "bl\\t__gnu_cmse_nonsecure_call"
+  [(set_attr "length" "4")
+   (set_attr "type" "call")]
+)
+
 (define_insn "*call_value_reg_thumb1"
   [(set (match_operand 0 "" "")
 	(call (mem:SI (match_operand:SI 1 "register_operand" "l*r"))
diff --git a/gcc/config/arm/thumb2.md b/gcc/config/arm/thumb2.md
index 3227c4226738a23b56a59cdf7a0052111317678c..5ea64174cf1c6965ad8e0cc43d62e881158d6d02 100644
--- a/gcc/config/arm/thumb2.md
+++ b/gcc/config/arm/thumb2.md
@@ -581,6 +581,19 @@ 
   [(set_attr "type" "call")]
 )
 
+(define_insn "*nonsecure_call_reg_thumb2"
+  [(call (unspec:SI [(mem:SI (match_operand:SI 0 "s_register_operand" "r"))]
+		    UNSPEC_NONSECURE_MEM)
+	 (match_operand 1 "" ""))
+   (use (match_operand 2 "" ""))
+   (clobber (reg:SI LR_REGNUM))
+   (clobber (match_dup 0))]
+  "TARGET_THUMB2 && use_cmse"
+  "bl\\t__gnu_cmse_nonsecure_call"
+  [(set_attr "length" "4")
+   (set_attr "type" "call")]
+)
+
 (define_insn "*call_value_reg_thumb2"
   [(set (match_operand 0 "" "")
 	(call (mem:SI (match_operand:SI 1 "register_operand" "l*r"))
@@ -592,6 +605,21 @@ 
   [(set_attr "type" "call")]
 )
 
+(define_insn "*nonsecure_call_value_reg_thumb2"
+  [(set (match_operand 0 "" "")
+	(call
+	 (unspec:SI [(mem:SI (match_operand:SI 1 "register_operand" "l*r"))]
+		    UNSPEC_NONSECURE_MEM)
+	 (match_operand 2 "" "")))
+   (use (match_operand 3 "" ""))
+   (clobber (reg:SI LR_REGNUM))
+   (clobber (match_dup 1))]
+  "TARGET_THUMB2 && use_cmse"
+  "bl\t__gnu_cmse_nonsecure_call"
+  [(set_attr "length" "4")
+   (set_attr "type" "call")]
+)
+
 (define_insn "*thumb2_indirect_jump"
   [(set (pc)
 	(match_operand:SI 0 "register_operand" "l*r"))]
diff --git a/gcc/config/arm/unspecs.md b/gcc/config/arm/unspecs.md
index 5744c62cf5ab3b3711fef2b442c62cd3eadf0793..c2f5e5b52cd84380c009af4077bd6effda923701 100644
--- a/gcc/config/arm/unspecs.md
+++ b/gcc/config/arm/unspecs.md
@@ -84,6 +84,8 @@ 
   UNSPEC_VRINTA         ; Represent a float to integral float rounding
                         ; towards nearest, ties away from zero.
   UNSPEC_PROBE_STACK    ; Probe stack memory reference
+  UNSPEC_NONSECURE_MEM	; Represent non-secure memory in ARMv8-M with
+			; security extension
 ])
 
 (define_c_enum "unspec" [
diff --git a/gcc/testsuite/gcc.target/arm/cmse/baseline/bitfield-4.c b/gcc/testsuite/gcc.target/arm/cmse/baseline/bitfield-4.c
new file mode 100644
index 0000000000000000000000000000000000000000..a6c1386c06edbdb58e76fa5e612c918010c507f6
--- /dev/null
+++ b/gcc/testsuite/gcc.target/arm/cmse/baseline/bitfield-4.c
@@ -0,0 +1,57 @@ 
+/* { dg-do compile } */
+/* { dg-options "-mcmse" } */
+
+typedef struct
+{
+  unsigned char a;
+  unsigned int b:5;
+  unsigned int c:11, :0, d:8;
+  struct { unsigned int ee:2; } e;
+} test_st;
+
+typedef union
+{
+  test_st st;
+  struct
+    {
+      unsigned int v1;
+      unsigned int v2;
+      unsigned int v3;
+      unsigned int v4;
+    }values;
+} read_st;
+
+
+typedef void __attribute__ ((cmse_nonsecure_call)) (*foo_ns) (test_st);
+
+extern void foo (test_st st);
+
+int
+main (void)
+{
+  read_st r;
+  foo_ns f;
+
+  f = (foo_ns) 0x200000;
+  r.values.v1 = 0xFFFFFFFF;
+  r.values.v2 = 0xFFFFFFFF;
+  r.values.v3 = 0xFFFFFFFF;
+  r.values.v4 = 0xFFFFFFFF;
+
+  f (r.st);
+  return 0;
+}
+
+/* { dg-final { scan-assembler "mov\tip, r4" } } */
+/* { dg-final { scan-assembler "movw\tr4, #65535" } } */
+/* { dg-final { scan-assembler "movt\tr4, 255" } } */
+/* { dg-final { scan-assembler "ands\tr0, r4" } } */
+/* { dg-final { scan-assembler "movs\tr4, #255" } } */
+/* { dg-final { scan-assembler "ands\tr1, r4" } } */
+/* { dg-final { scan-assembler "movs\tr4, #3" } } */
+/* { dg-final { scan-assembler "ands\tr2, r4" } } */
+/* { dg-final { scan-assembler "mov\tr4, ip" } } */
+/* { dg-final { scan-assembler "lsrs\tr4, r4, #1" } } */
+/* { dg-final { scan-assembler "lsls\tr4, r4, #1" } } */
+/* { dg-final { scan-assembler "movs\tr3, r4" } } */
+/* { dg-final { scan-assembler "bl\t__gnu_cmse_nonsecure_call" } } */
diff --git a/gcc/testsuite/gcc.target/arm/cmse/baseline/bitfield-5.c b/gcc/testsuite/gcc.target/arm/cmse/baseline/bitfield-5.c
new file mode 100644
index 0000000000000000000000000000000000000000..d51ce2d42c051aeda8b06ad97086f2563a5fc47d
--- /dev/null
+++ b/gcc/testsuite/gcc.target/arm/cmse/baseline/bitfield-5.c
@@ -0,0 +1,53 @@ 
+/* { dg-do compile } */
+/* { dg-options "-mcmse" } */
+
+typedef struct
+{
+  unsigned char	  a;
+  unsigned short  b :5;
+  unsigned char	  c;
+  unsigned short  d :11;
+} test_st;
+
+typedef union
+{
+  test_st st;
+  struct
+    {
+      unsigned int v1;
+      unsigned int v2;
+      unsigned int v3;
+      unsigned int v4;
+    }values;
+} read_st;
+
+
+typedef void __attribute__ ((cmse_nonsecure_call)) (*foo_ns) (test_st);
+
+int
+main (void)
+{
+  read_st r;
+  foo_ns f;
+
+  f = (foo_ns) 0x200000;
+  r.values.v1 = 0xFFFFFFFF;
+  r.values.v2 = 0xFFFFFFFF;
+
+  f (r.st);
+  return 0;
+}
+
+/* { dg-final { scan-assembler "mov\tip, r4" } } */
+/* { dg-final { scan-assembler "movw\tr4, #8191" } } */
+/* { dg-final { scan-assembler "movt\tr4, 255" } } */
+/* { dg-final { scan-assembler "ands\tr0, r4" } } */
+/* { dg-final { scan-assembler "movw\tr4, #2047" } } */
+/* { dg-final { scan-assembler "ands\tr1, r4" } } */
+/* { dg-final { scan-assembler "mov\tr4, ip" } } */
+/* { dg-final { scan-assembler "lsrs\tr4, r4, #1" } } */
+/* { dg-final { scan-assembler "lsls\tr4, r4, #1" } } */
+/* { dg-final { scan-assembler "movs\tr2, r4" } } */
+/* { dg-final { scan-assembler "movs\tr3, r4" } } */
+/* { dg-final { scan-assembler "bl\t__gnu_cmse_nonsecure_call" } } */
+
diff --git a/gcc/testsuite/gcc.target/arm/cmse/baseline/bitfield-6.c b/gcc/testsuite/gcc.target/arm/cmse/baseline/bitfield-6.c
new file mode 100644
index 0000000000000000000000000000000000000000..77e9104b546a7693fcb2399622e828b1197eac1b
--- /dev/null
+++ b/gcc/testsuite/gcc.target/arm/cmse/baseline/bitfield-6.c
@@ -0,0 +1,63 @@ 
+/* { dg-do compile } */
+/* { dg-options "-mcmse" } */
+
+typedef struct
+{
+  unsigned char a;
+  unsigned int	b : 3;
+  unsigned int	c : 14;
+  unsigned int	d : 1;
+  struct {
+      unsigned int    ee  : 2;
+      unsigned short  ff  : 15;
+  } e;
+  unsigned char	g : 1;
+  unsigned char	  : 4;
+  unsigned char	h : 3;
+} test_st;
+
+typedef union
+{
+  test_st st;
+  struct
+    {
+      unsigned int v1;
+      unsigned int v2;
+      unsigned int v3;
+      unsigned int v4;
+    }values;
+} read_st;
+
+
+typedef void __attribute__ ((cmse_nonsecure_call)) (*foo_ns) (test_st);
+
+int
+main (void)
+{
+  read_st r;
+  foo_ns f;
+
+  f = (foo_ns) 0x200000;
+  r.values.v1 = 0xFFFFFFFF;
+  r.values.v2 = 0xFFFFFFFF;
+  r.values.v3 = 0xFFFFFFFF;
+  r.values.v4 = 0xFFFFFFFF;
+
+  f (r.st);
+  return 0;
+}
+
+/* { dg-final { scan-assembler "mov\tip, r4" } } */
+/* { dg-final { scan-assembler "movw\tr4, #65535" } } */
+/* { dg-final { scan-assembler "movt\tr4, 1023" } } */
+/* { dg-final { scan-assembler "ands\tr0, r4" } } */
+/* { dg-final { scan-assembler "movs\tr4, #3" } } */
+/* { dg-final { scan-assembler "movt\tr4, 32767" } } */
+/* { dg-final { scan-assembler "ands\tr1, r4" } } */
+/* { dg-final { scan-assembler "movs\tr4, #255" } } */
+/* { dg-final { scan-assembler "ands\tr2, r4" } } */
+/* { dg-final { scan-assembler "mov\tr4, ip" } } */
+/* { dg-final { scan-assembler "lsrs\tr4, r4, #1" } } */
+/* { dg-final { scan-assembler "lsls\tr4, r4, #1" } } */
+/* { dg-final { scan-assembler "movs\tr3, r4" } } */
+/* { dg-final { scan-assembler "bl\t__gnu_cmse_nonsecure_call" } } */
diff --git a/gcc/testsuite/gcc.target/arm/cmse/baseline/bitfield-7.c b/gcc/testsuite/gcc.target/arm/cmse/baseline/bitfield-7.c
new file mode 100644
index 0000000000000000000000000000000000000000..3d8941bbfeebd59744c43f10c842816b36ec9915
--- /dev/null
+++ b/gcc/testsuite/gcc.target/arm/cmse/baseline/bitfield-7.c
@@ -0,0 +1,54 @@ 
+/* { dg-do compile } */
+/* { dg-options "-mcmse" } */
+
+typedef struct
+{
+  unsigned char	  a;
+  unsigned short  b :5;
+  unsigned char	  c;
+  unsigned short  d :11;
+} test_st;
+
+typedef union
+{
+  test_st st;
+  struct
+    {
+      unsigned int v1;
+      unsigned int v2;
+      unsigned int v3;
+      unsigned int v4;
+    }values;
+} read_st;
+
+
+typedef void __attribute__ ((cmse_nonsecure_call)) (*foo_ns) (test_st);
+
+int
+main (void)
+{
+  read_st r;
+  foo_ns f;
+
+  f = (foo_ns) 0x200000;
+  r.values.v1 = 0xFFFFFFFF;
+  r.values.v2 = 0xFFFFFFFF;
+
+  f (r.st);
+  return 0;
+}
+
+
+/* { dg-final { scan-assembler "mov\tip, r4" } } */
+/* { dg-final { scan-assembler "movw\tr4, #8191" } } */
+/* { dg-final { scan-assembler "movt\tr4, 255" } } */
+/* { dg-final { scan-assembler "ands\tr0, r4" } } */
+/* { dg-final { scan-assembler "movw\tr4, #2047" } } */
+/* { dg-final { scan-assembler "ands\tr1, r4" } } */
+/* { dg-final { scan-assembler "mov\tr4, ip" } } */
+/* { dg-final { scan-assembler "lsrs\tr4, r4, #1" } } */
+/* { dg-final { scan-assembler "lsls\tr4, r4, #1" } } */
+/* { dg-final { scan-assembler "movs\tr2, r4" } } */
+/* { dg-final { scan-assembler "movs\tr3, r4" } } */
+/* { dg-final { scan-assembler "bl\t__gnu_cmse_nonsecure_call" } } */
+
diff --git a/gcc/testsuite/gcc.target/arm/cmse/baseline/bitfield-8.c b/gcc/testsuite/gcc.target/arm/cmse/baseline/bitfield-8.c
new file mode 100644
index 0000000000000000000000000000000000000000..9ffbb718d34d5bb8f10e1f3c0505c7dc393c670c
--- /dev/null
+++ b/gcc/testsuite/gcc.target/arm/cmse/baseline/bitfield-8.c
@@ -0,0 +1,57 @@ 
+/* { dg-do compile } */
+/* { dg-options "-mcmse" } */
+
+typedef struct
+{
+  unsigned char	  a;
+  unsigned int	    :0;
+  unsigned int	  b :1;
+  unsigned short    :0;
+  unsigned short  c;
+  unsigned int	    :0;
+  unsigned int	  d :21;
+} test_st;
+
+typedef union
+{
+  test_st st;
+  struct
+    {
+      unsigned int v1;
+      unsigned int v2;
+      unsigned int v3;
+      unsigned int v4;
+    }values;
+} read_st;
+
+typedef void __attribute__ ((cmse_nonsecure_call)) (*foo_ns) (test_st);
+
+int
+main (void)
+{
+  read_st r;
+  foo_ns f;
+
+  f = (foo_ns) 0x200000;
+  r.values.v1 = 0xFFFFFFFF;
+  r.values.v2 = 0xFFFFFFFF;
+  r.values.v3 = 0xFFFFFFFF;
+
+  f (r.st);
+  return 0;
+}
+
+/* { dg-final { scan-assembler "mov\tip, r4" } } */
+/* { dg-final { scan-assembler "movs\tr4, #255" } } */
+/* { dg-final { scan-assembler "ands\tr0, r4" } } */
+/* { dg-final { scan-assembler "movs\tr4, #1" } } */
+/* { dg-final { scan-assembler "movt\tr4, 65535" } } */
+/* { dg-final { scan-assembler "ands\tr1, r4" } } */
+/* { dg-final { scan-assembler "movw\tr4, #65535" } } */
+/* { dg-final { scan-assembler "movt\tr4, 31" } } */
+/* { dg-final { scan-assembler "ands\tr2, r4" } } */
+/* { dg-final { scan-assembler "mov\tr4, ip" } } */
+/* { dg-final { scan-assembler "lsrs\tr4, r4, #1" } } */
+/* { dg-final { scan-assembler "lsls\tr4, r4, #1" } } */
+/* { dg-final { scan-assembler "movs\tr3, r4" } } */
+/* { dg-final { scan-assembler "bl\t__gnu_cmse_nonsecure_call" } } */
diff --git a/gcc/testsuite/gcc.target/arm/cmse/baseline/bitfield-9.c b/gcc/testsuite/gcc.target/arm/cmse/baseline/bitfield-9.c
new file mode 100644
index 0000000000000000000000000000000000000000..8a6141829237823b8734de045a590a1917fa60b8
--- /dev/null
+++ b/gcc/testsuite/gcc.target/arm/cmse/baseline/bitfield-9.c
@@ -0,0 +1,56 @@ 
+/* { dg-do compile } */
+/* { dg-options "-mcmse" } */
+
+typedef struct
+{
+  char a:3;
+} test_st3;
+
+typedef struct
+{
+  char a:3;
+} test_st2;
+
+typedef struct
+{
+  test_st2 st2;
+  test_st3 st3;
+} test_st;
+
+typedef union
+{
+  test_st st;
+  struct
+    {
+      unsigned int v1;
+      unsigned int v2;
+      unsigned int v3;
+      unsigned int v4;
+    }values;
+} read_st;
+
+typedef void __attribute__ ((cmse_nonsecure_call)) (*foo_ns) (test_st);
+
+int
+main (void)
+{
+  read_st r;
+  foo_ns f;
+
+  f = (foo_ns) 0x200000;
+  r.values.v1 = 0xFFFFFFFF;
+
+  f (r.st);
+  return 0;
+}
+
+/* { dg-final { scan-assembler "mov\tip, r4" } } */
+/* { dg-final { scan-assembler "movw\tr4, #1799" } } */
+/* { dg-final { scan-assembler "ands\tr0, r4" } } */
+/* { dg-final { scan-assembler "mov\tr4, ip" } } */
+/* { dg-final { scan-assembler "lsrs\tr4, r4, #1" } } */
+/* { dg-final { scan-assembler "lsls\tr4, r4, #1" } } */
+/* { dg-final { scan-assembler "movs\tr1, r4" } } */
+/* { dg-final { scan-assembler "movs\tr2, r4" } } */
+/* { dg-final { scan-assembler "movs\tr3, r4" } } */
+/* { dg-final { scan-assembler "bl\t__gnu_cmse_nonsecure_call" } } */
diff --git a/gcc/testsuite/gcc.target/arm/cmse/baseline/bitfield-and-union-1.c b/gcc/testsuite/gcc.target/arm/cmse/baseline/bitfield-and-union-1.c
new file mode 100644
index 0000000000000000000000000000000000000000..642f4e0346b5186c78645780b45fe9c838848d45
--- /dev/null
+++ b/gcc/testsuite/gcc.target/arm/cmse/baseline/bitfield-and-union-1.c
@@ -0,0 +1,96 @@ 
+/* { dg-do compile } */
+/* { dg-options "-mcmse" } */
+
+typedef struct
+{
+  unsigned short a :11;
+} test_st_4;
+
+typedef union
+{
+  char	      a;
+  test_st_4 st4;
+}test_un_2;
+
+typedef struct
+{
+  unsigned char	  a;
+  unsigned int	    :0;
+  unsigned int	  b :1;
+  unsigned short    :0;
+  unsigned short  c;
+  unsigned int	    :0;
+  unsigned int	  d :21;
+} test_st_3;
+
+typedef struct
+{
+  unsigned char	  a :3;
+  unsigned int	  b :13;
+  test_un_2	  un2;
+} test_st_2;
+
+typedef union
+{
+  test_st_2 st2;
+  test_st_3 st3;
+}test_un_1;
+
+typedef struct
+{
+  unsigned char	  a :2;
+  unsigned char	    :0;
+  unsigned short  b :5;
+  unsigned char	    :0;
+  unsigned char	  c :4;
+  test_un_1	  un1;
+} test_st_1;
+
+typedef union
+{
+  test_st_1 st1;
+  struct
+    {
+      unsigned int v1;
+      unsigned int v2;
+      unsigned int v3;
+      unsigned int v4;
+    }values;
+} read_st_1;
+
+
+typedef void __attribute__ ((cmse_nonsecure_call)) (*foo_ns) (test_st_1);
+
+int
+main (void)
+{
+  read_st_1 r;
+  foo_ns f;
+
+  f = (foo_ns) 0x200000;
+  r.values.v1 = 0xFFFFFFFF;
+  r.values.v2 = 0xFFFFFFFF;
+  r.values.v3 = 0xFFFFFFFF;
+  r.values.v4 = 0xFFFFFFFF;
+
+  f (r.st1);
+  return 0;
+}
+
+/* { dg-final { scan-assembler "mov\tip, r4" } } */
+/* { dg-final { scan-assembler "movw\tr4, #7939" } } */
+/* { dg-final { scan-assembler "movt\tr4, 15" } } */
+/* { dg-final { scan-assembler "ands\tr0, r4" } } */
+/* { dg-final { scan-assembler "movw\tr4, #65535" } } */
+/* { dg-final { scan-assembler "movt\tr4, 2047" } } */
+/* { dg-final { scan-assembler "ands\tr1, r4" } } */
+/* { dg-final { scan-assembler "movs\tr4, #1" } } */
+/* { dg-final { scan-assembler "movt\tr4, 65535" } } */
+/* { dg-final { scan-assembler "ands\tr2, r4" } } */
+/* { dg-final { scan-assembler "movw\tr4, #65535" } } */
+/* { dg-final { scan-assembler "movt\tr4, 31" } } */
+/* { dg-final { scan-assembler "ands\tr3, r4" } } */
+/* { dg-final { scan-assembler "mov\tr4, ip" } } */
+/* { dg-final { scan-assembler "lsrs\tr4, r4, #1" } } */
+/* { dg-final { scan-assembler "lsls\tr4, r4, #1" } } */
+/* { dg-final { scan-assembler "bl\t__gnu_cmse_nonsecure_call" } } */
diff --git a/gcc/testsuite/gcc.target/arm/cmse/baseline/cmse-11.c b/gcc/testsuite/gcc.target/arm/cmse/baseline/cmse-11.c
new file mode 100644
index 0000000000000000000000000000000000000000..3007409ad88b9d2312ece4d55f3695787a1aa566
--- /dev/null
+++ b/gcc/testsuite/gcc.target/arm/cmse/baseline/cmse-11.c
@@ -0,0 +1,22 @@ 
+/* { dg-do compile } */
+/* { dg-require-effective-target arm_arch_v8m_base_ok } */
+/* { dg-add-options arm_arch_v8m_base } */
+/* { dg-options "-mcmse" }  */
+
+int __attribute__ ((cmse_nonsecure_call)) (*bar) (int);
+
+int
+foo (int a)
+{
+  return bar (bar (a + 1));
+}
+
+/* Checks for saving and clearing prior to function call.  */
+/* { dg-final { scan-assembler "lsrs\tr4, r4, #1" } } */
+/* { dg-final { scan-assembler "lsls\tr4, r4, #1" } } */
+/* { dg-final { scan-assembler "movs\tr1, r4" } } */
+/* { dg-final { scan-assembler "movs\tr2, r4" } } */
+/* { dg-final { scan-assembler "movs\tr3, r4" } } */
+
+/* Now we check that we use the correct intrinsic to call.  */
+/* { dg-final { scan-assembler "bl\t__gnu_cmse_nonsecure_call" } } */
diff --git a/gcc/testsuite/gcc.target/arm/cmse/baseline/cmse-13.c b/gcc/testsuite/gcc.target/arm/cmse/baseline/cmse-13.c
new file mode 100644
index 0000000000000000000000000000000000000000..f2b931be5912b421f8427535ded3298883bec639
--- /dev/null
+++ b/gcc/testsuite/gcc.target/arm/cmse/baseline/cmse-13.c
@@ -0,0 +1,25 @@ 
+/* { dg-do compile } */
+/* { dg-require-effective-target arm_arch_v8m_base_ok } */
+/* { dg-add-options arm_arch_v8m_base } */
+/* { dg-options "-mcmse" } */
+
+int __attribute__ ((cmse_nonsecure_call)) (*bar) (float, double);
+
+int
+foo (int a)
+{
+  return bar (1.0f, 2.0) + a + 1;
+}
+
+/* Checks for saving and clearing prior to function call.  */
+/* { dg-final { scan-assembler "lsrs\tr4, r4, #1" } } */
+/* { dg-final { scan-assembler "lsls\tr4, r4, #1" } } */
+/* { dg-final { scan-assembler-not "movs\tr0, r4" } } */
+/* { dg-final { scan-assembler "\n\tmovs\tr1, r4" } } */
+/* { dg-final { scan-assembler-not "\n\tmovs\tr2, r4\n\tmovs\tr3, r4" } } */
+/* { dg-final { scan-assembler-not "vmov" } } */
+/* { dg-final { scan-assembler-not "vmsr" } } */
+
+/* Now we check that we use the correct intrinsic to call.  */
+/* { dg-final { scan-assembler "bl\t__gnu_cmse_nonsecure_call" } } */
+
diff --git a/gcc/testsuite/gcc.target/arm/cmse/baseline/cmse-6.c b/gcc/testsuite/gcc.target/arm/cmse/baseline/cmse-6.c
new file mode 100644
index 0000000000000000000000000000000000000000..95da045690ae170a101949134482e821f27fe3aa
--- /dev/null
+++ b/gcc/testsuite/gcc.target/arm/cmse/baseline/cmse-6.c
@@ -0,0 +1,21 @@ 
+/* { dg-do compile } */
+/* { dg-require-effective-target arm_arch_v8m_base_ok } */
+/* { dg-add-options arm_arch_v8m_base } */
+/* { dg-options "-mcmse" }  */
+
+int __attribute__ ((cmse_nonsecure_call)) (*bar) (double);
+
+int
+foo (int a)
+{
+  return bar (2.0) + a + 1;
+}
+
+/* Remember dont clear r0 and r1, because we are passing the double parameter
+ * for bar in them.  */
+/* { dg-final { scan-assembler "lsrs\tr4, r4, #1" } } */
+/* { dg-final { scan-assembler "lsls\tr4, r4, #1" } } */
+/* { dg-final { scan-assembler "movs\tr2, r4" } } */
+
+/* Now we check that we use the correct intrinsic to call.  */
+/* { dg-final { scan-assembler "bl\t__gnu_cmse_nonsecure_call" } } */
diff --git a/gcc/testsuite/gcc.target/arm/cmse/baseline/union-1.c b/gcc/testsuite/gcc.target/arm/cmse/baseline/union-1.c
new file mode 100644
index 0000000000000000000000000000000000000000..ff18e839b02c19c2c77769b18ef5ee1cfacf0c71
--- /dev/null
+++ b/gcc/testsuite/gcc.target/arm/cmse/baseline/union-1.c
@@ -0,0 +1,71 @@ 
+/* { dg-do compile } */
+/* { dg-options "-mcmse" } */
+
+typedef struct
+{
+  unsigned char	  a :2;
+  unsigned char	    :0;
+  unsigned short  b :5;
+  unsigned char	    :0;
+  unsigned short  c :3;
+  unsigned char	    :0;
+  unsigned int	  d :9;
+} test_st_1;
+
+typedef struct
+{
+  unsigned short  a :7;
+  unsigned char	    :0;
+  unsigned char	  b :1;
+  unsigned char	    :0;
+  unsigned short  c :6;
+} test_st_2;
+
+typedef union
+{
+  test_st_1 st_1;
+  test_st_2 st_2;
+}test_un;
+
+typedef union
+{
+  test_un un;
+  struct
+    {
+      unsigned int v1;
+      unsigned int v2;
+      unsigned int v3;
+      unsigned int v4;
+    }values;
+} read_un;
+
+
+typedef void __attribute__ ((cmse_nonsecure_call)) (*foo_ns) (test_un);
+
+int
+main (void)
+{
+  read_un r;
+  foo_ns f;
+
+  f = (foo_ns) 0x200000;
+  r.values.v1 = 0xFFFFFFFF;
+  r.values.v2 = 0xFFFFFFFF;
+
+  f (r.un);
+  return 0;
+}
+
+/* { dg-final { scan-assembler "mov\tip, r4" } } */
+/* { dg-final { scan-assembler "movw\tr4, #8063" } } */
+/* { dg-final { scan-assembler "movt\tr4, 63" } } */
+/* { dg-final { scan-assembler "ands\tr0, r4" } } */
+/* { dg-final { scan-assembler "movw\tr4, #511" } } */
+/* { dg-final { scan-assembler "ands\tr1, r4" } } */
+/* { dg-final { scan-assembler "mov\tr4, ip" } } */
+/* { dg-final { scan-assembler "lsrs\tr4, r4, #1" } } */
+/* { dg-final { scan-assembler "lsls\tr4, r4, #1" } } */
+/* { dg-final { scan-assembler "movs\tr2, r4" } } */
+/* { dg-final { scan-assembler "movs\tr3, r4" } } */
+/* { dg-final { scan-assembler "bl\t__gnu_cmse_nonsecure_call" } } */
+
diff --git a/gcc/testsuite/gcc.target/arm/cmse/baseline/union-2.c b/gcc/testsuite/gcc.target/arm/cmse/baseline/union-2.c
new file mode 100644
index 0000000000000000000000000000000000000000..b2e024b7f0776381f511077af91bd1ee5632ff12
--- /dev/null
+++ b/gcc/testsuite/gcc.target/arm/cmse/baseline/union-2.c
@@ -0,0 +1,86 @@ 
+/* { dg-do compile } */
+/* { dg-options "-mcmse" } */
+
+typedef struct
+{
+  unsigned char	  a :2;
+  unsigned char	    :0;
+  unsigned short  b :5;
+  unsigned char	    :0;
+  unsigned short  c :3;
+  unsigned char	    :0;
+  unsigned int	  d :9;
+} test_st_1;
+
+typedef struct
+{
+  unsigned short  a :7;
+  unsigned char	    :0;
+  unsigned char	  b :1;
+  unsigned char	    :0;
+  unsigned short  c :6;
+} test_st_2;
+
+typedef struct
+{
+  unsigned char	  a;
+  unsigned int	    :0;
+  unsigned int	  b :1;
+  unsigned short    :0;
+  unsigned short  c;
+  unsigned int	    :0;
+  unsigned int	  d :21;
+} test_st_3;
+
+typedef union
+{
+  test_st_1 st_1;
+  test_st_2 st_2;
+  test_st_3 st_3;
+}test_un;
+
+typedef union
+{
+  test_un un;
+  struct
+    {
+      unsigned int v1;
+      unsigned int v2;
+      unsigned int v3;
+      unsigned int v4;
+    }values;
+} read_un;
+
+
+typedef void __attribute__ ((cmse_nonsecure_call)) (*foo_ns) (test_un);
+
+int
+main (void)
+{
+  read_un r;
+  foo_ns f;
+
+  f = (foo_ns) 0x200000;
+  r.values.v1 = 0xFFFFFFFF;
+  r.values.v2 = 0xFFFFFFFF;
+  r.values.v3 = 0xFFFFFFFF;
+
+  f (r.un);
+  return 0;
+}
+
+/* { dg-final { scan-assembler "mov\tip, r4" } } */
+/* { dg-final { scan-assembler "movw\tr4, #8191" } } */
+/* { dg-final { scan-assembler "movt\tr4, 63" } } */
+/* { dg-final { scan-assembler "ands\tr0, r4" } } */
+/* { dg-final { scan-assembler "movw\tr4, #511" } } */
+/* { dg-final { scan-assembler "movt\tr4, 65535" } } */
+/* { dg-final { scan-assembler "ands\tr1, r4" } } */
+/* { dg-final { scan-assembler "movw\tr4, #65535" } } */
+/* { dg-final { scan-assembler "movt\tr4, 31" } } */
+/* { dg-final { scan-assembler "ands\tr2, r4" } } */
+/* { dg-final { scan-assembler "mov\tr4, ip" } } */
+/* { dg-final { scan-assembler "lsrs\tr4, r4, #1" } } */
+/* { dg-final { scan-assembler "lsls\tr4, r4, #1" } } */
+/* { dg-final { scan-assembler "movs\tr3, r4" } } */
+/* { dg-final { scan-assembler "bl\t__gnu_cmse_nonsecure_call" } } */
diff --git a/gcc/testsuite/gcc.target/arm/cmse/cmse-9.c b/gcc/testsuite/gcc.target/arm/cmse/cmse-9.c
index 65200bcf29b219706911bbb799c847aefc92cb1c..79ddc7cb1fe1724b82ae028c2ddf91321e855811 100644
--- a/gcc/testsuite/gcc.target/arm/cmse/cmse-9.c
+++ b/gcc/testsuite/gcc.target/arm/cmse/cmse-9.c
@@ -2,11 +2,19 @@ 
 /* { dg-skip-if "Testing exclusion of -mcmse" { arm-*-* } { "-mcmse" } { "" } }  */
 
 
+void __attribute__ ((cmse_nonsecure_call)) (*bar) (int);
+typedef void __attribute__ ((cmse_nonsecure_call)) baz (int);
+
 int __attribute__ ((cmse_nonsecure_entry))
-foo (int a)
+foo (int a, baz b)
 {
+  bar (a);
+  b (a);
   return a + 1;
 }
 
+/* { dg-final { scan-assembler-not "bxns" } } */
+/* { dg-final { scan-assembler-not "blxns" } } */
+/* { dg-final { scan-assembler-not "bl\t__gnu_cmse_nonsecure_call" } } */
 /* { dg-final { scan-assembler "foo:" } } */
 /* { dg-final { scan-assembler-not "__acle_se_foo:" } } */
diff --git a/gcc/testsuite/gcc.target/arm/cmse/cmse.exp b/gcc/testsuite/gcc.target/arm/cmse/cmse.exp
index 38f18414c2fefec56161e6ac3f7291b03a3b29a3..66a8b7da005f7dfeffbded61b02fd6a7473a1dcf 100644
--- a/gcc/testsuite/gcc.target/arm/cmse/cmse.exp
+++ b/gcc/testsuite/gcc.target/arm/cmse/cmse.exp
@@ -50,6 +50,8 @@  if {[check_effective_target_arm_arch_v8m_base_ok]} then {
 }
 
 if {[check_effective_target_arm_arch_v8m_main_ok]} then {
+    gcc-dg-runtest [lsort [glob $srcdir/$subdir/mainline/*.c]] \
+	    "" $DEFAULT_CFLAGS
     # Mainline -mfloat-abi=soft
     gcc-dg-runtest [lsort [glob $srcdir/$subdir/mainline/soft/*.c]] \
 	    "-mfloat-abi=soft" $DEFAULT_CFLAGS
diff --git a/gcc/testsuite/gcc.target/arm/cmse/mainline/bitfield-4.c b/gcc/testsuite/gcc.target/arm/cmse/mainline/bitfield-4.c
new file mode 100644
index 0000000000000000000000000000000000000000..c3b1396d52e742a1710ed5ad33fbeb559d866f6f
--- /dev/null
+++ b/gcc/testsuite/gcc.target/arm/cmse/mainline/bitfield-4.c
@@ -0,0 +1,55 @@ 
+/* { dg-do compile } */
+/* { dg-options "-mcmse" } */
+
+typedef struct
+{
+  unsigned char a;
+  unsigned int b:5;
+  unsigned int c:11, :0, d:8;
+  struct { unsigned int ee:2; } e;
+} test_st;
+
+typedef union
+{
+  test_st st;
+  struct
+    {
+      unsigned int v1;
+      unsigned int v2;
+      unsigned int v3;
+      unsigned int v4;
+    }values;
+} read_st;
+
+
+typedef void __attribute__ ((cmse_nonsecure_call)) (*foo_ns) (test_st);
+
+extern void foo (test_st st);
+
+int
+main (void)
+{
+  read_st r;
+  foo_ns f;
+
+  f = (foo_ns) 0x200000;
+  r.values.v1 = 0xFFFFFFFF;
+  r.values.v2 = 0xFFFFFFFF;
+  r.values.v3 = 0xFFFFFFFF;
+  r.values.v4 = 0xFFFFFFFF;
+
+  f (r.st);
+  return 0;
+}
+
+/* { dg-final { scan-assembler "movw\tip, #65535" } } */
+/* { dg-final { scan-assembler "movt\tip, 255" } } */
+/* { dg-final { scan-assembler "and\tr0, r0, ip" } } */
+/* { dg-final { scan-assembler "mov\tip, #255" } } */
+/* { dg-final { scan-assembler "and\tr1, r1, ip" } } */
+/* { dg-final { scan-assembler "mov\tip, #3" } } */
+/* { dg-final { scan-assembler "and\tr2, r2, ip" } } */
+/* { dg-final { scan-assembler "lsrs\tr4, r4, #1" } } */
+/* { dg-final { scan-assembler "lsls\tr4, r4, #1" } } */
+/* { dg-final { scan-assembler "mov\tr3, r4" } } */
+/* { dg-final { scan-assembler "bl\t__gnu_cmse_nonsecure_call" } } */
diff --git a/gcc/testsuite/gcc.target/arm/cmse/mainline/bitfield-5.c b/gcc/testsuite/gcc.target/arm/cmse/mainline/bitfield-5.c
new file mode 100644
index 0000000000000000000000000000000000000000..0d029044aa9aa1d412c28ee5d18a8e3d0be36546
--- /dev/null
+++ b/gcc/testsuite/gcc.target/arm/cmse/mainline/bitfield-5.c
@@ -0,0 +1,51 @@ 
+/* { dg-do compile } */
+/* { dg-options "-mcmse" } */
+
+typedef struct
+{
+  unsigned char	  a;
+  unsigned short  b :5;
+  unsigned char	  c;
+  unsigned short  d :11;
+} test_st;
+
+typedef union
+{
+  test_st st;
+  struct
+    {
+      unsigned int v1;
+      unsigned int v2;
+      unsigned int v3;
+      unsigned int v4;
+    }values;
+} read_st;
+
+
+typedef void __attribute__ ((cmse_nonsecure_call)) (*foo_ns) (test_st);
+
+int
+main (void)
+{
+  read_st r;
+  foo_ns f;
+
+  f = (foo_ns) 0x200000;
+  r.values.v1 = 0xFFFFFFFF;
+  r.values.v2 = 0xFFFFFFFF;
+
+  f (r.st);
+  return 0;
+}
+
+/* { dg-final { scan-assembler "movw\tip, #8191" } } */
+/* { dg-final { scan-assembler "movt\tip, 255" } } */
+/* { dg-final { scan-assembler "and\tr0, r0, ip" } } */
+/* { dg-final { scan-assembler "movw\tip, #2047" } } */
+/* { dg-final { scan-assembler "and\tr1, r1, ip" } } */
+/* { dg-final { scan-assembler "lsrs\tr4, r4, #1" } } */
+/* { dg-final { scan-assembler "lsls\tr4, r4, #1" } } */
+/* { dg-final { scan-assembler "mov\tr2, r4" } } */
+/* { dg-final { scan-assembler "mov\tr3, r4" } } */
+/* { dg-final { scan-assembler "bl\t__gnu_cmse_nonsecure_call" } } */
+
diff --git a/gcc/testsuite/gcc.target/arm/cmse/mainline/bitfield-6.c b/gcc/testsuite/gcc.target/arm/cmse/mainline/bitfield-6.c
new file mode 100644
index 0000000000000000000000000000000000000000..005515ab9cb85c201a2a8b2f6417d73ceeacbc60
--- /dev/null
+++ b/gcc/testsuite/gcc.target/arm/cmse/mainline/bitfield-6.c
@@ -0,0 +1,61 @@ 
+/* { dg-do compile } */
+/* { dg-options "-mcmse" } */
+
+typedef struct
+{
+  unsigned char a;
+  unsigned int	b : 3;
+  unsigned int	c : 14;
+  unsigned int	d : 1;
+  struct {
+      unsigned int    ee  : 2;
+      unsigned short  ff  : 15;
+  } e;
+  unsigned char	g : 1;
+  unsigned char	  : 4;
+  unsigned char	h : 3;
+} test_st;
+
+typedef union
+{
+  test_st st;
+  struct
+    {
+      unsigned int v1;
+      unsigned int v2;
+      unsigned int v3;
+      unsigned int v4;
+    }values;
+} read_st;
+
+
+typedef void __attribute__ ((cmse_nonsecure_call)) (*foo_ns) (test_st);
+
+int
+main (void)
+{
+  read_st r;
+  foo_ns f;
+
+  f = (foo_ns) 0x200000;
+  r.values.v1 = 0xFFFFFFFF;
+  r.values.v2 = 0xFFFFFFFF;
+  r.values.v3 = 0xFFFFFFFF;
+  r.values.v4 = 0xFFFFFFFF;
+
+  f (r.st);
+  return 0;
+}
+
+/* { dg-final { scan-assembler "movw\tip, #65535" } } */
+/* { dg-final { scan-assembler "movt\tip, 1023" } } */
+/* { dg-final { scan-assembler "and\tr0, r0, ip" } } */
+/* { dg-final { scan-assembler "mov\tip, #3" } } */
+/* { dg-final { scan-assembler "movt\tip, 32767" } } */
+/* { dg-final { scan-assembler "and\tr1, r1, ip" } } */
+/* { dg-final { scan-assembler "mov\tip, #255" } } */
+/* { dg-final { scan-assembler "and\tr2, r2, ip" } } */
+/* { dg-final { scan-assembler "lsrs\tr4, r4, #1" } } */
+/* { dg-final { scan-assembler "lsls\tr4, r4, #1" } } */
+/* { dg-final { scan-assembler "mov\tr3, r4" } } */
+/* { dg-final { scan-assembler "bl\t__gnu_cmse_nonsecure_call" } } */
diff --git a/gcc/testsuite/gcc.target/arm/cmse/mainline/bitfield-7.c b/gcc/testsuite/gcc.target/arm/cmse/mainline/bitfield-7.c
new file mode 100644
index 0000000000000000000000000000000000000000..6dd218e62fdee2a6af819079ba1ea1909185d076
--- /dev/null
+++ b/gcc/testsuite/gcc.target/arm/cmse/mainline/bitfield-7.c
@@ -0,0 +1,52 @@ 
+/* { dg-do compile } */
+/* { dg-options "-mcmse" } */
+
+typedef struct
+{
+  unsigned char	  a;
+  unsigned short  b :5;
+  unsigned char	  c;
+  unsigned short  d :11;
+} test_st;
+
+typedef union
+{
+  test_st st;
+  struct
+    {
+      unsigned int v1;
+      unsigned int v2;
+      unsigned int v3;
+      unsigned int v4;
+    }values;
+} read_st;
+
+
+typedef void __attribute__ ((cmse_nonsecure_call)) (*foo_ns) (test_st);
+
+int
+main (void)
+{
+  read_st r;
+  foo_ns f;
+
+  f = (foo_ns) 0x200000;
+  r.values.v1 = 0xFFFFFFFF;
+  r.values.v2 = 0xFFFFFFFF;
+
+  f (r.st);
+  return 0;
+}
+
+
+/* { dg-final { scan-assembler "movw\tip, #8191" } } */
+/* { dg-final { scan-assembler "movt\tip, 255" } } */
+/* { dg-final { scan-assembler "and\tr0, r0, ip" } } */
+/* { dg-final { scan-assembler "movw\tip, #2047" } } */
+/* { dg-final { scan-assembler "and\tr1, r1, ip" } } */
+/* { dg-final { scan-assembler "lsrs\tr4, r4, #1" } } */
+/* { dg-final { scan-assembler "lsls\tr4, r4, #1" } } */
+/* { dg-final { scan-assembler "mov\tr2, r4" } } */
+/* { dg-final { scan-assembler "mov\tr3, r4" } } */
+/* { dg-final { scan-assembler "bl\t__gnu_cmse_nonsecure_call" } } */
+
diff --git a/gcc/testsuite/gcc.target/arm/cmse/mainline/bitfield-8.c b/gcc/testsuite/gcc.target/arm/cmse/mainline/bitfield-8.c
new file mode 100644
index 0000000000000000000000000000000000000000..c833bcb0ae978572fad46780bc180f61ccb14345
--- /dev/null
+++ b/gcc/testsuite/gcc.target/arm/cmse/mainline/bitfield-8.c
@@ -0,0 +1,55 @@ 
+/* { dg-do compile } */
+/* { dg-options "-mcmse" } */
+
+typedef struct
+{
+  unsigned char	  a;
+  unsigned int	    :0;
+  unsigned int	  b :1;
+  unsigned short    :0;
+  unsigned short  c;
+  unsigned int	    :0;
+  unsigned int	  d :21;
+} test_st;
+
+typedef union
+{
+  test_st st;
+  struct
+    {
+      unsigned int v1;
+      unsigned int v2;
+      unsigned int v3;
+      unsigned int v4;
+    }values;
+} read_st;
+
+typedef void __attribute__ ((cmse_nonsecure_call)) (*foo_ns) (test_st);
+
+int
+main (void)
+{
+  read_st r;
+  foo_ns f;
+
+  f = (foo_ns) 0x200000;
+  r.values.v1 = 0xFFFFFFFF;
+  r.values.v2 = 0xFFFFFFFF;
+  r.values.v3 = 0xFFFFFFFF;
+
+  f (r.st);
+  return 0;
+}
+
+/* { dg-final { scan-assembler "mov\tip, #255" } } */
+/* { dg-final { scan-assembler "and\tr0, r0, ip" } } */
+/* { dg-final { scan-assembler "mov\tip, #1" } } */
+/* { dg-final { scan-assembler "movt\tip, 65535" } } */
+/* { dg-final { scan-assembler "and\tr1, r1, ip" } } */
+/* { dg-final { scan-assembler "movw\tip, #65535" } } */
+/* { dg-final { scan-assembler "movt\tip, 31" } } */
+/* { dg-final { scan-assembler "and\tr2, r2, ip" } } */
+/* { dg-final { scan-assembler "lsrs\tr4, r4, #1" } } */
+/* { dg-final { scan-assembler "lsls\tr4, r4, #1" } } */
+/* { dg-final { scan-assembler "mov\tr3, r4" } } */
+/* { dg-final { scan-assembler "bl\t__gnu_cmse_nonsecure_call" } } */
diff --git a/gcc/testsuite/gcc.target/arm/cmse/mainline/bitfield-9.c b/gcc/testsuite/gcc.target/arm/cmse/mainline/bitfield-9.c
new file mode 100644
index 0000000000000000000000000000000000000000..d6e4cdb8c44b19c811f3a7b4fbce102a6c768f2b
--- /dev/null
+++ b/gcc/testsuite/gcc.target/arm/cmse/mainline/bitfield-9.c
@@ -0,0 +1,54 @@ 
+/* { dg-do compile } */
+/* { dg-options "-mcmse" } */
+
+typedef struct
+{
+  char a:3;
+} test_st3;
+
+typedef struct
+{
+  char a:3;
+} test_st2;
+
+typedef struct
+{
+  test_st2 st2;
+  test_st3 st3;
+} test_st;
+
+typedef union
+{
+  test_st st;
+  struct
+    {
+      unsigned int v1;
+      unsigned int v2;
+      unsigned int v3;
+      unsigned int v4;
+    }values;
+} read_st;
+
+typedef void __attribute__ ((cmse_nonsecure_call)) (*foo_ns) (test_st);
+
+int
+main (void)
+{
+  read_st r;
+  foo_ns f;
+
+  f = (foo_ns) 0x200000;
+  r.values.v1 = 0xFFFFFFFF;
+
+  f (r.st);
+  return 0;
+}
+
+/* { dg-final { scan-assembler "movw\tip, #1799" } } */
+/* { dg-final { scan-assembler "and\tr0, r0, ip" } } */
+/* { dg-final { scan-assembler "lsrs\tr4, r4, #1" } } */
+/* { dg-final { scan-assembler "lsls\tr4, r4, #1" } } */
+/* { dg-final { scan-assembler "mov\tr1, r4" } } */
+/* { dg-final { scan-assembler "mov\tr2, r4" } } */
+/* { dg-final { scan-assembler "mov\tr3, r4" } } */
+/* { dg-final { scan-assembler "bl\t__gnu_cmse_nonsecure_call" } } */
diff --git a/gcc/testsuite/gcc.target/arm/cmse/mainline/bitfield-and-union-1.c b/gcc/testsuite/gcc.target/arm/cmse/mainline/bitfield-and-union-1.c
new file mode 100644
index 0000000000000000000000000000000000000000..e139ba61af57f06cff5a9d121c97bbf41e170bb9
--- /dev/null
+++ b/gcc/testsuite/gcc.target/arm/cmse/mainline/bitfield-and-union-1.c
@@ -0,0 +1,94 @@ 
+/* { dg-do compile } */
+/* { dg-options "-mcmse" } */
+
+typedef struct
+{
+  unsigned short a :11;
+} test_st_4;
+
+typedef union
+{
+  char	      a;
+  test_st_4 st4;
+}test_un_2;
+
+typedef struct
+{
+  unsigned char	  a;
+  unsigned int	    :0;
+  unsigned int	  b :1;
+  unsigned short    :0;
+  unsigned short  c;
+  unsigned int	    :0;
+  unsigned int	  d :21;
+} test_st_3;
+
+typedef struct
+{
+  unsigned char	  a :3;
+  unsigned int	  b :13;
+  test_un_2	  un2;
+} test_st_2;
+
+typedef union
+{
+  test_st_2 st2;
+  test_st_3 st3;
+}test_un_1;
+
+typedef struct
+{
+  unsigned char	  a :2;
+  unsigned char	    :0;
+  unsigned short  b :5;
+  unsigned char	    :0;
+  unsigned char	  c :4;
+  test_un_1	  un1;
+} test_st_1;
+
+typedef union
+{
+  test_st_1 st1;
+  struct
+    {
+      unsigned int v1;
+      unsigned int v2;
+      unsigned int v3;
+      unsigned int v4;
+    }values;
+} read_st_1;
+
+
+typedef void __attribute__ ((cmse_nonsecure_call)) (*foo_ns) (test_st_1);
+
+int
+main (void)
+{
+  read_st_1 r;
+  foo_ns f;
+
+  f = (foo_ns) 0x200000;
+  r.values.v1 = 0xFFFFFFFF;
+  r.values.v2 = 0xFFFFFFFF;
+  r.values.v3 = 0xFFFFFFFF;
+  r.values.v4 = 0xFFFFFFFF;
+
+  f (r.st1);
+  return 0;
+}
+
+/* { dg-final { scan-assembler "movw\tip, #7939" } } */
+/* { dg-final { scan-assembler "movt\tip, 15" } } */
+/* { dg-final { scan-assembler "and\tr0, r0, ip" } } */
+/* { dg-final { scan-assembler "movw\tip, #65535" } } */
+/* { dg-final { scan-assembler "movt\tip, 2047" } } */
+/* { dg-final { scan-assembler "and\tr1, r1, ip" } } */
+/* { dg-final { scan-assembler "mov\tip, #1" } } */
+/* { dg-final { scan-assembler "movt\tip, 65535" } } */
+/* { dg-final { scan-assembler "and\tr2, r2, ip" } } */
+/* { dg-final { scan-assembler "movw\tip, #65535" } } */
+/* { dg-final { scan-assembler "movt\tip, 31" } } */
+/* { dg-final { scan-assembler "and\tr3, r3, ip" } } */
+/* { dg-final { scan-assembler "lsrs\tr4, r4, #1" } } */
+/* { dg-final { scan-assembler "lsls\tr4, r4, #1" } } */
+/* { dg-final { scan-assembler "bl\t__gnu_cmse_nonsecure_call" } } */
diff --git a/gcc/testsuite/gcc.target/arm/cmse/mainline/hard-sp/cmse-13.c b/gcc/testsuite/gcc.target/arm/cmse/mainline/hard-sp/cmse-13.c
new file mode 100644
index 0000000000000000000000000000000000000000..285fa854b3d61c4d856e9be863ee73a87f1b11a9
--- /dev/null
+++ b/gcc/testsuite/gcc.target/arm/cmse/mainline/hard-sp/cmse-13.c
@@ -0,0 +1,43 @@ 
+/* { dg-do compile } */
+/* { dg-require-effective-target arm_arch_v8m_main_ok } */
+/* { dg-add-options arm_arch_v8m_main } */
+/* { dg-skip-if "Do not combine float-abi= hard | soft | softfp" {*-*-*} {"-mfloat-abi=soft" -mfloat-abi=softfp } {""} } */
+/* { dg-skip-if "Skip these if testing double precision" {*-*-*} {"-mfpu=fpv[4-5]-d16"} {""} } */
+/* { dg-options "-mcmse -mfloat-abi=hard -mfpu=fpv5-sp-d16" }  */
+
+
+int __attribute__ ((cmse_nonsecure_call)) (*bar) (float, double);
+
+int
+foo (int a)
+{
+  return bar (3.0f, 2.0) + a + 1;
+}
+
+/* Checks for saving and clearing prior to function call.  */
+/* { dg-final { scan-assembler "lsrs\tr4, r4, #1" } } */
+/* { dg-final { scan-assembler "lsls\tr4, r4, #1" } } */
+/* { dg-final { scan-assembler "mov\tr0, r4" } } */
+/* { dg-final { scan-assembler "mov\tr1, r4" } } */
+/* { dg-final { scan-assembler "mov\tr2, r4" } } */
+/* { dg-final { scan-assembler "mov\tr3, r4" } } */
+/* { dg-final { scan-assembler-not "vmov\.f32\ts0, #1\.0" } } */
+/* { dg-final { scan-assembler "vmov\.f32\ts1, #1\.0" } } */
+/* { dg-final { scan-assembler-not "vmov\.f32\ts2, #1\.0" } } */
+/* { dg-final { scan-assembler-not "vmov\.f32\ts3, #1\.0" } } */
+/* { dg-final { scan-assembler "vmov\.f32\ts4, #1\.0" } } */
+/* { dg-final { scan-assembler "vmov\.f32\ts5, #1\.0" } } */
+/* { dg-final { scan-assembler "vmov\.f32\ts6, #1\.0" } } */
+/* { dg-final { scan-assembler "vmov\.f32\ts7, #1\.0" } } */
+/* { dg-final { scan-assembler "vmov\.f32\ts8, #1\.0" } } */
+/* { dg-final { scan-assembler "vmov\.f32\ts9, #1\.0" } } */
+/* { dg-final { scan-assembler "vmov\.f32\ts10, #1\.0" } } */
+/* { dg-final { scan-assembler "vmov\.f32\ts11, #1\.0" } } */
+/* { dg-final { scan-assembler "vmov\.f32\ts12, #1\.0" } } */
+/* { dg-final { scan-assembler "vmov\.f32\ts13, #1\.0" } } */
+/* { dg-final { scan-assembler "vmov\.f32\ts14, #1\.0" } } */
+/* { dg-final { scan-assembler "vmov\.f32\ts15, #1\.0" } } */
+
+/* Now we check that we use the correct intrinsic to call.  */
+/* { dg-final { scan-assembler "bl\t__gnu_cmse_nonsecure_call" } } */
+
diff --git a/gcc/testsuite/gcc.target/arm/cmse/mainline/hard-sp/cmse-7.c b/gcc/testsuite/gcc.target/arm/cmse/mainline/hard-sp/cmse-7.c
new file mode 100644
index 0000000000000000000000000000000000000000..8f56aaf2a97e740a77473cab245614b6fa696c04
--- /dev/null
+++ b/gcc/testsuite/gcc.target/arm/cmse/mainline/hard-sp/cmse-7.c
@@ -0,0 +1,42 @@ 
+/* { dg-do compile } */
+/* { dg-require-effective-target arm_arch_v8m_main_ok } */
+/* { dg-add-options arm_arch_v8m_main } */
+/* { dg-skip-if "Do not combine float-abi= hard | soft | softfp" {*-*-*} {"-mfloat-abi=soft" -mfloat-abi=softfp } {""} } */
+/* { dg-skip-if "Skip these if testing double precision" {*-*-*} {"-mfpu=fpv[4-5]-d16"} {""} } */
+/* { dg-options "-mcmse -mfloat-abi=hard -mfpu=fpv5-sp-d16" }  */
+
+int __attribute__ ((cmse_nonsecure_call)) (*bar) (void);
+
+int
+foo (int a)
+{
+  return bar () + a + 1;
+}
+
+/* Checks for saving and clearing prior to function call.  */
+/* { dg-final { scan-assembler "lsrs\tr4, r4, #1" } } */
+/* { dg-final { scan-assembler "lsls\tr4, r4, #1" } } */
+/* { dg-final { scan-assembler "mov\tr0, r4" } } */
+/* { dg-final { scan-assembler "mov\tr1, r4" } } */
+/* { dg-final { scan-assembler "mov\tr2, r4" } } */
+/* { dg-final { scan-assembler "mov\tr3, r4" } } */
+/* { dg-final { scan-assembler "vmov\.f32\ts0, #1\.0" } } */
+/* { dg-final { scan-assembler "vmov\.f32\ts1, #1\.0" } } */
+/* { dg-final { scan-assembler "vmov\.f32\ts2, #1\.0" } } */
+/* { dg-final { scan-assembler "vmov\.f32\ts3, #1\.0" } } */
+/* { dg-final { scan-assembler "vmov\.f32\ts4, #1\.0" } } */
+/* { dg-final { scan-assembler "vmov\.f32\ts5, #1\.0" } } */
+/* { dg-final { scan-assembler "vmov\.f32\ts6, #1\.0" } } */
+/* { dg-final { scan-assembler "vmov\.f32\ts7, #1\.0" } } */
+/* { dg-final { scan-assembler "vmov\.f32\ts8, #1\.0" } } */
+/* { dg-final { scan-assembler "vmov\.f32\ts9, #1\.0" } } */
+/* { dg-final { scan-assembler "vmov\.f32\ts10, #1\.0" } } */
+/* { dg-final { scan-assembler "vmov\.f32\ts11, #1\.0" } } */
+/* { dg-final { scan-assembler "vmov\.f32\ts12, #1\.0" } } */
+/* { dg-final { scan-assembler "vmov\.f32\ts13, #1\.0" } } */
+/* { dg-final { scan-assembler "vmov\.f32\ts14, #1\.0" } } */
+/* { dg-final { scan-assembler "vmov\.f32\ts15, #1\.0" } } */
+
+/* Now we check that we use the correct intrinsic to call.  */
+/* { dg-final { scan-assembler "bl\t__gnu_cmse_nonsecure_call" } } */
+
diff --git a/gcc/testsuite/gcc.target/arm/cmse/mainline/hard-sp/cmse-8.c b/gcc/testsuite/gcc.target/arm/cmse/mainline/hard-sp/cmse-8.c
new file mode 100644
index 0000000000000000000000000000000000000000..749f8a7278cb4ea9fd4462887ce7f37b57f83248
--- /dev/null
+++ b/gcc/testsuite/gcc.target/arm/cmse/mainline/hard-sp/cmse-8.c
@@ -0,0 +1,41 @@ 
+/* { dg-do compile } */
+/* { dg-require-effective-target arm_arch_v8m_main_ok } */
+/* { dg-add-options arm_arch_v8m_main } */
+/* { dg-skip-if "Do not combine float-abi= hard | soft | softfp" {*-*-*} {"-mfloat-abi=soft" -mfloat-abi=softfp } {""} } */
+/* { dg-skip-if "Skip these if testing double precision" {*-*-*} {"-mfpu=fpv[4-5]-d16"} {""} } */
+/* { dg-options "-mcmse -mfloat-abi=hard -mfpu=fpv5-sp-d16" }  */
+
+int __attribute__ ((cmse_nonsecure_call)) (*bar) (double);
+
+int
+foo (int a)
+{
+  return bar (2.0) + a + 1;
+}
+
+/* Checks for saving and clearing prior to function call.  */
+/* { dg-final { scan-assembler "lsrs\tr4, r4, #1" } } */
+/* { dg-final { scan-assembler "lsls\tr4, r4, #1" } } */
+/* { dg-final { scan-assembler "mov\tr0, r4" } } */
+/* { dg-final { scan-assembler "mov\tr1, r4" } } */
+/* { dg-final { scan-assembler "mov\tr2, r4" } } */
+/* { dg-final { scan-assembler "mov\tr3, r4" } } */
+/* { dg-final { scan-assembler-not "vmov\.f32\ts0, #1\.0" } } */
+/* { dg-final { scan-assembler-not "vmov\.f32\ts1, #1\.0" } } */
+/* { dg-final { scan-assembler "vmov\.f32\ts2, #1\.0" } } */
+/* { dg-final { scan-assembler "vmov\.f32\ts3, #1\.0" } } */
+/* { dg-final { scan-assembler "vmov\.f32\ts4, #1\.0" } } */
+/* { dg-final { scan-assembler "vmov\.f32\ts5, #1\.0" } } */
+/* { dg-final { scan-assembler "vmov\.f32\ts6, #1\.0" } } */
+/* { dg-final { scan-assembler "vmov\.f32\ts7, #1\.0" } } */
+/* { dg-final { scan-assembler "vmov\.f32\ts8, #1\.0" } } */
+/* { dg-final { scan-assembler "vmov\.f32\ts9, #1\.0" } } */
+/* { dg-final { scan-assembler "vmov\.f32\ts10, #1\.0" } } */
+/* { dg-final { scan-assembler "vmov\.f32\ts11, #1\.0" } } */
+/* { dg-final { scan-assembler "vmov\.f32\ts12, #1\.0" } } */
+/* { dg-final { scan-assembler "vmov\.f32\ts13, #1\.0" } } */
+/* { dg-final { scan-assembler "vmov\.f32\ts14, #1\.0" } } */
+/* { dg-final { scan-assembler "vmov\.f32\ts15, #1\.0" } } */
+
+/* Now we check that we use the correct intrinsic to call.  */
+/* { dg-final { scan-assembler "bl\t__gnu_cmse_nonsecure_call" } } */
diff --git a/gcc/testsuite/gcc.target/arm/cmse/mainline/hard/cmse-13.c b/gcc/testsuite/gcc.target/arm/cmse/mainline/hard/cmse-13.c
new file mode 100644
index 0000000000000000000000000000000000000000..4ad5068aac263f1c2edb17b8707fc9d1c0af6959
--- /dev/null
+++ b/gcc/testsuite/gcc.target/arm/cmse/mainline/hard/cmse-13.c
@@ -0,0 +1,35 @@ 
+/* { dg-do compile } */
+/* { dg-require-effective-target arm_arch_v8m_main_ok } */
+/* { dg-add-options arm_arch_v8m_main } */
+/* { dg-skip-if "Do not combine float-abi= hard | soft | softfp" {*-*-*} {"-mfloat-abi=soft" -mfloat-abi=softfp } {""} } */
+/* { dg-skip-if "Skip these if testing single precision" {*-*-*} {"-mfpu=*-sp-*"} {""} } */
+/* { dg-options "-mcmse -mfloat-abi=hard -mfpu=fpv5-d16" }  */
+
+
+int __attribute__ ((cmse_nonsecure_call)) (*bar) (float, double);
+
+int
+foo (int a)
+{
+  return bar (3.0f, 2.0) + a + 1;
+}
+
+/* Checks for saving and clearing prior to function call.  */
+/* { dg-final { scan-assembler "lsrs\tr4, r4, #1" } } */
+/* { dg-final { scan-assembler "lsls\tr4, r4, #1" } } */
+/* { dg-final { scan-assembler "mov\tr0, r4" } } */
+/* { dg-final { scan-assembler "mov\tr1, r4" } } */
+/* { dg-final { scan-assembler "mov\tr2, r4" } } */
+/* { dg-final { scan-assembler "mov\tr3, r4" } } */
+/* { dg-final { scan-assembler-not "vmov\.f32\ts0, #1\.0" } } */
+/* { dg-final { scan-assembler "vmov\.f32\ts1, #1\.0" } } */
+/* { dg-final { scan-assembler-not "vmov\.f64\td1, #1\.0" } } */
+/* { dg-final { scan-assembler "vmov\.f64\td2, #1\.0" } } */
+/* { dg-final { scan-assembler "vmov\.f64\td3, #1\.0" } } */
+/* { dg-final { scan-assembler "vmov\.f64\td4, #1\.0" } } */
+/* { dg-final { scan-assembler "vmov\.f64\td5, #1\.0" } } */
+/* { dg-final { scan-assembler "vmov\.f64\td6, #1\.0" } } */
+/* { dg-final { scan-assembler "vmov\.f64\td7, #1\.0" } } */
+
+/* Now we check that we use the correct intrinsic to call.  */
+/* { dg-final { scan-assembler "bl\t__gnu_cmse_nonsecure_call" } } */
diff --git a/gcc/testsuite/gcc.target/arm/cmse/mainline/hard/cmse-7.c b/gcc/testsuite/gcc.target/arm/cmse/mainline/hard/cmse-7.c
new file mode 100644
index 0000000000000000000000000000000000000000..b18259eaef6da1933ef2d58d63b97d4bb4e450f4
--- /dev/null
+++ b/gcc/testsuite/gcc.target/arm/cmse/mainline/hard/cmse-7.c
@@ -0,0 +1,34 @@ 
+/* { dg-do compile } */
+/* { dg-require-effective-target arm_arch_v8m_main_ok } */
+/* { dg-add-options arm_arch_v8m_main } */
+/* { dg-skip-if "Do not combine float-abi= hard | soft | softfp" {*-*-*} {"-mfloat-abi=soft" -mfloat-abi=softfp } {""} } */
+/* { dg-skip-if "Skip these if testing single precision" {*-*-*} {"-mfpu=*-sp-*"} {""} } */
+/* { dg-options "-mcmse -mfloat-abi=hard -mfpu=fpv5-d16" }  */
+
+int __attribute__ ((cmse_nonsecure_call)) (*bar) (void);
+
+int
+foo (int a)
+{
+  return bar () + a + 1;
+}
+
+/* Checks for saving and clearing prior to function call.  */
+/* { dg-final { scan-assembler "lsrs\tr4, r4, #1" } } */
+/* { dg-final { scan-assembler "lsls\tr4, r4, #1" } } */
+/* { dg-final { scan-assembler "mov\tr0, r4" } } */
+/* { dg-final { scan-assembler "mov\tr1, r4" } } */
+/* { dg-final { scan-assembler "mov\tr2, r4" } } */
+/* { dg-final { scan-assembler "mov\tr3, r4" } } */
+/* { dg-final { scan-assembler "vmov\.f64\td0, #1\.0" } } */
+/* { dg-final { scan-assembler "vmov\.f64\td1, #1\.0" } } */
+/* { dg-final { scan-assembler "vmov\.f64\td2, #1\.0" } } */
+/* { dg-final { scan-assembler "vmov\.f64\td3, #1\.0" } } */
+/* { dg-final { scan-assembler "vmov\.f64\td4, #1\.0" } } */
+/* { dg-final { scan-assembler "vmov\.f64\td5, #1\.0" } } */
+/* { dg-final { scan-assembler "vmov\.f64\td6, #1\.0" } } */
+/* { dg-final { scan-assembler "vmov\.f64\td7, #1\.0" } } */
+
+/* Now we check that we use the correct intrinsic to call.  */
+/* { dg-final { scan-assembler "bl\t__gnu_cmse_nonsecure_call" } } */
+
diff --git a/gcc/testsuite/gcc.target/arm/cmse/mainline/hard/cmse-8.c b/gcc/testsuite/gcc.target/arm/cmse/mainline/hard/cmse-8.c
new file mode 100644
index 0000000000000000000000000000000000000000..182ddf9540374f30ae3694259f1edb62161455e1
--- /dev/null
+++ b/gcc/testsuite/gcc.target/arm/cmse/mainline/hard/cmse-8.c
@@ -0,0 +1,33 @@ 
+/* { dg-do compile } */
+/* { dg-require-effective-target arm_arch_v8m_main_ok } */
+/* { dg-add-options arm_arch_v8m_main } */
+/* { dg-skip-if "Do not combine float-abi= hard | soft | softfp" {*-*-*} {"-mfloat-abi=soft" -mfloat-abi=softfp } {""} } */
+/* { dg-skip-if "Skip these if testing single precision" {*-*-*} {"-mfpu=*-sp-*"} {""} } */
+/* { dg-options "-mcmse -mfloat-abi=hard -mfpu=fpv5-d16" }  */
+
+int __attribute__ ((cmse_nonsecure_call)) (*bar) (double);
+
+int
+foo (int a)
+{
+  return bar (2.0) + a + 1;
+}
+
+/* Checks for saving and clearing prior to function call.  */
+/* { dg-final { scan-assembler "lsrs\tr4, r4, #1" } } */
+/* { dg-final { scan-assembler "lsls\tr4, r4, #1" } } */
+/* { dg-final { scan-assembler "mov\tr0, r4" } } */
+/* { dg-final { scan-assembler "mov\tr1, r4" } } */
+/* { dg-final { scan-assembler "mov\tr2, r4" } } */
+/* { dg-final { scan-assembler "mov\tr3, r4" } } */
+/* { dg-final { scan-assembler-not "vmov\.f64\td0, #1\.0" } } */
+/* { dg-final { scan-assembler "vmov\.f64\td1, #1\.0" } } */
+/* { dg-final { scan-assembler "vmov\.f64\td2, #1\.0" } } */
+/* { dg-final { scan-assembler "vmov\.f64\td3, #1\.0" } } */
+/* { dg-final { scan-assembler "vmov\.f64\td4, #1\.0" } } */
+/* { dg-final { scan-assembler "vmov\.f64\td5, #1\.0" } } */
+/* { dg-final { scan-assembler "vmov\.f64\td6, #1\.0" } } */
+/* { dg-final { scan-assembler "vmov\.f64\td7, #1\.0" } } */
+
+/* Now we check that we use the correct intrinsic to call.  */
+/* { dg-final { scan-assembler "bl\t__gnu_cmse_nonsecure_call" } } */
diff --git a/gcc/testsuite/gcc.target/arm/cmse/mainline/soft/cmse-13.c b/gcc/testsuite/gcc.target/arm/cmse/mainline/soft/cmse-13.c
new file mode 100644
index 0000000000000000000000000000000000000000..dbbd262c89085eb0dc8737ad7955c3a12531492b
--- /dev/null
+++ b/gcc/testsuite/gcc.target/arm/cmse/mainline/soft/cmse-13.c
@@ -0,0 +1,27 @@ 
+/* { dg-do compile } */
+/* { dg-require-effective-target arm_arch_v8m_main_ok } */
+/* { dg-add-options arm_arch_v8m_main } */
+/* { dg-skip-if "Do not combine float-abi= hard | soft | softfp" {*-*-*} {"-mfloat-abi=hard" -mfloat-abi=softfp } {""} } */
+/* { dg-options "-mcmse -mfloat-abi=soft" }  */
+
+int __attribute__ ((cmse_nonsecure_call)) (*bar) (float, double);
+
+int
+foo (int a)
+{
+  return bar (1.0f, 2.0) + a + 1;
+}
+
+/* Checks for saving and clearing prior to function call.  */
+/* { dg-final { scan-assembler "lsrs\tr4, r4, #1" } } */
+/* { dg-final { scan-assembler "lsls\tr4, r4, #1" } } */
+/* { dg-final { scan-assembler-not "mov\tr0, r4" } } */
+/* { dg-final { scan-assembler "mov\tr1, r4" } } */
+/* { dg-final { scan-assembler-not "mov\tr2, r4" } } */
+/* { dg-final { scan-assembler-not "mov\tr3, r4" } } */
+/* { dg-final { scan-assembler-not "vmov" } } */
+/* { dg-final { scan-assembler-not "vmsr" } } */
+
+/* Now we check that we use the correct intrinsic to call.  */
+/* { dg-final { scan-assembler "bl\t__gnu_cmse_nonsecure_call" } } */
+
diff --git a/gcc/testsuite/gcc.target/arm/cmse/mainline/soft/cmse-7.c b/gcc/testsuite/gcc.target/arm/cmse/mainline/soft/cmse-7.c
new file mode 100644
index 0000000000000000000000000000000000000000..e33568400ef830abaa019b5c2727a9f3b5d5704b
--- /dev/null
+++ b/gcc/testsuite/gcc.target/arm/cmse/mainline/soft/cmse-7.c
@@ -0,0 +1,27 @@ 
+/* { dg-do compile } */
+/* { dg-require-effective-target arm_arch_v8m_main_ok } */
+/* { dg-add-options arm_arch_v8m_main } */
+/* { dg-skip-if "Do not combine float-abi= hard | soft | softfp" {*-*-*} {"-mfloat-abi=hard" -mfloat-abi=softfp } {""} } */
+/* { dg-options "-mcmse -mfloat-abi=soft" }  */
+
+int __attribute__ ((cmse_nonsecure_call)) (*bar) (void);
+
+int
+foo (int a)
+{
+  return bar () + a + 1;
+}
+
+/* Checks for saving and clearing prior to function call.  */
+/* { dg-final { scan-assembler "lsrs\tr4, r4, #1" } } */
+/* { dg-final { scan-assembler "lsls\tr4, r4, #1" } } */
+/* { dg-final { scan-assembler "mov\tr0, r4" } } */
+/* { dg-final { scan-assembler "mov\tr1, r4" } } */
+/* { dg-final { scan-assembler "mov\tr2, r4" } } */
+/* { dg-final { scan-assembler "mov\tr3, r4" } } */
+/* { dg-final { scan-assembler-not "vmov" } } */
+/* { dg-final { scan-assembler-not "vmsr" } } */
+
+/* Now we check that we use the correct intrinsic to call.  */
+/* { dg-final { scan-assembler "bl\t__gnu_cmse_nonsecure_call" } } */
+
diff --git a/gcc/testsuite/gcc.target/arm/cmse/mainline/soft/cmse-8.c b/gcc/testsuite/gcc.target/arm/cmse/mainline/soft/cmse-8.c
new file mode 100644
index 0000000000000000000000000000000000000000..024a12e0a414730eb1cbebfca8574d548238ab28
--- /dev/null
+++ b/gcc/testsuite/gcc.target/arm/cmse/mainline/soft/cmse-8.c
@@ -0,0 +1,26 @@ 
+/* { dg-do compile } */
+/* { dg-require-effective-target arm_arch_v8m_main_ok } */
+/* { dg-add-options arm_arch_v8m_main } */
+/* { dg-skip-if "Do not combine float-abi= hard | soft | softfp" {*-*-*} {"-mfloat-abi=hard" -mfloat-abi=softfp } {""} } */
+/* { dg-options "-mcmse -mfloat-abi=soft" }  */
+
+int __attribute__ ((cmse_nonsecure_call)) (*bar) (double);
+
+int
+foo (int a)
+{
+  return bar (2.0) + a + 1;
+}
+
+/* Checks for saving and clearing prior to function call.  */
+/* { dg-final { scan-assembler "lsrs\tr4, r4, #1" } } */
+/* { dg-final { scan-assembler "lsls\tr4, r4, #1" } } */
+/* { dg-final { scan-assembler-not "mov\tr0, r4" } } */
+/* { dg-final { scan-assembler-not "mov\tr1, r4" } } */
+/* { dg-final { scan-assembler "mov\tr2, r4" } } */
+/* { dg-final { scan-assembler "mov\tr3, r4" } } */
+/* { dg-final { scan-assembler-not "vmov" } } */
+/* { dg-final { scan-assembler-not "vmsr" } } */
+
+/* Now we check that we use the correct intrinsic to call.  */
+/* { dg-final { scan-assembler "bl\t__gnu_cmse_nonsecure_call" } } */
diff --git a/gcc/testsuite/gcc.target/arm/cmse/mainline/softfp-sp/cmse-7.c b/gcc/testsuite/gcc.target/arm/cmse/mainline/softfp-sp/cmse-7.c
new file mode 100644
index 0000000000000000000000000000000000000000..fb195eb58d59fe9ea5ed74af79646199c61bcdae
--- /dev/null
+++ b/gcc/testsuite/gcc.target/arm/cmse/mainline/softfp-sp/cmse-7.c
@@ -0,0 +1,26 @@ 
+/* { dg-do compile } */
+/* { dg-require-effective-target arm_arch_v8m_main_ok } */
+/* { dg-add-options arm_arch_v8m_main } */
+/* { dg-skip-if "Do not combine float-abi= hard | soft | softfp" {*-*-*} {"-mfloat-abi=soft" -mfloat-abi=hard } {""} } */
+/* { dg-skip-if "Skip these if testing double precision" {*-*-*} {"-mfpu=fpv[4-5]-d16"} {""} } */
+/* { dg-options "-mcmse -mfloat-abi=softfp -mfpu=fpv5-sp-d16" }  */
+
+int __attribute__ ((cmse_nonsecure_call)) (*bar) (void);
+
+int
+foo (int a)
+{
+  return bar () + a + 1;
+}
+
+/* Checks for saving and clearing prior to function call.  */
+/* { dg-final { scan-assembler "lsrs\tr4, r4, #1" } } */
+/* { dg-final { scan-assembler "lsls\tr4, r4, #1" } } */
+/* { dg-final { scan-assembler "mov\tr0, r4" } } */
+/* { dg-final { scan-assembler "mov\tr1, r4" } } */
+/* { dg-final { scan-assembler "mov\tr2, r4" } } */
+/* { dg-final { scan-assembler "mov\tr3, r4" } } */
+
+/* Now we check that we use the correct intrinsic to call.  */
+/* { dg-final { scan-assembler "bl\t__gnu_cmse_nonsecure_call" } } */
+
diff --git a/gcc/testsuite/gcc.target/arm/cmse/mainline/softfp-sp/cmse-8.c b/gcc/testsuite/gcc.target/arm/cmse/mainline/softfp-sp/cmse-8.c
new file mode 100644
index 0000000000000000000000000000000000000000..22ed3f8af882f96da49919c60fc6f4cd74dfc54b
--- /dev/null
+++ b/gcc/testsuite/gcc.target/arm/cmse/mainline/softfp-sp/cmse-8.c
@@ -0,0 +1,25 @@ 
+/* { dg-do compile } */
+/* { dg-require-effective-target arm_arch_v8m_main_ok } */
+/* { dg-add-options arm_arch_v8m_main } */
+/* { dg-skip-if "Do not combine float-abi= hard | soft | softfp" {*-*-*} {"-mfloat-abi=soft" -mfloat-abi=hard } {""} } */
+/* { dg-skip-if "Skip these if testing double precision" {*-*-*} {"-mfpu=fpv[4-5]-d16"} {""} } */
+/* { dg-options "-mcmse -mfloat-abi=softfp -mfpu=fpv5-sp-d16" }  */
+
+int __attribute__ ((cmse_nonsecure_call)) (*bar) (double);
+
+int
+foo (int a)
+{
+  return bar (2.0) + a + 1;
+}
+
+/* Checks for saving and clearing prior to function call.  */
+/* { dg-final { scan-assembler "lsrs\tr4, r4, #1" } } */
+/* { dg-final { scan-assembler "lsls\tr4, r4, #1" } } */
+/* { dg-final { scan-assembler-not "mov\tr0, r4" } } */
+/* { dg-final { scan-assembler-not "mov\tr1, r4" } } */
+/* { dg-final { scan-assembler "mov\tr2, r4" } } */
+/* { dg-final { scan-assembler "mov\tr3, r4" } } */
+
+/* Now we check that we use the correct intrinsic to call.  */
+/* { dg-final { scan-assembler "bl\t__gnu_cmse_nonsecure_call" } } */
diff --git a/gcc/testsuite/gcc.target/arm/cmse/mainline/softfp/cmse-13.c b/gcc/testsuite/gcc.target/arm/cmse/mainline/softfp/cmse-13.c
new file mode 100644
index 0000000000000000000000000000000000000000..9634065e7cb64a5069cbb3c9be4b8cf9177f5e29
--- /dev/null
+++ b/gcc/testsuite/gcc.target/arm/cmse/mainline/softfp/cmse-13.c
@@ -0,0 +1,25 @@ 
+/* { dg-do compile } */
+/* { dg-require-effective-target arm_arch_v8m_main_ok } */
+/* { dg-add-options arm_arch_v8m_main } */
+/* { dg-skip-if "Do not combine float-abi= hard | soft | softfp" {*-*-*} {"-mfloat-abi=soft" -mfloat-abi=hard } {""} } */
+/* { dg-skip-if "Skip these if testing single precision" {*-*-*} {"-mfpu=*-sp-*"} {""} } */
+/* { dg-options "-mcmse -mfloat-abi=softfp -mfpu=fpv5-d16" }  */
+
+int __attribute__ ((cmse_nonsecure_call)) (*bar) (float, double);
+
+int
+foo (int a)
+{
+  return bar (1.0f, 2.0) + a + 1;
+}
+
+/* Checks for saving and clearing prior to function call.  */
+/* { dg-final { scan-assembler "lsrs\tr4, r4, #1" } } */
+/* { dg-final { scan-assembler "lsls\tr4, r4, #1" } } */
+/* { dg-final { scan-assembler-not "mov\tr0, r4" } } */
+/* { dg-final { scan-assembler "\n\tmov\tr1, r4" } } */
+/* { dg-final { scan-assembler-not "\n\tmov\tr2, r4\n\tmov\tr3, r4" } } */
+
+/* Now we check that we use the correct intrinsic to call.  */
+/* { dg-final { scan-assembler "bl\t__gnu_cmse_nonsecure_call" } } */
+
diff --git a/gcc/testsuite/gcc.target/arm/cmse/mainline/softfp/cmse-7.c b/gcc/testsuite/gcc.target/arm/cmse/mainline/softfp/cmse-7.c
new file mode 100644
index 0000000000000000000000000000000000000000..04f8466cc112c03ee5a05e6e5223d2c66a033bbe
--- /dev/null
+++ b/gcc/testsuite/gcc.target/arm/cmse/mainline/softfp/cmse-7.c
@@ -0,0 +1,26 @@ 
+/* { dg-do compile } */
+/* { dg-require-effective-target arm_arch_v8m_main_ok } */
+/* { dg-add-options arm_arch_v8m_main } */
+/* { dg-skip-if "Do not combine float-abi= hard | soft | softfp" {*-*-*} {"-mfloat-abi=soft" -mfloat-abi=hard } {""} } */
+/* { dg-skip-if "Skip these if testing single precision" {*-*-*} {"-mfpu=*-sp-*"} {""} } */
+/* { dg-options "-mcmse -mfloat-abi=softfp -mfpu=fpv5-d16" }  */
+
+int __attribute__ ((cmse_nonsecure_call)) (*bar) (void);
+
+int
+foo (int a)
+{
+  return bar () + a + 1;
+}
+
+/* Checks for saving and clearing prior to function call.  */
+/* { dg-final { scan-assembler "lsrs\tr4, r4, #1" } } */
+/* { dg-final { scan-assembler "lsls\tr4, r4, #1" } } */
+/* { dg-final { scan-assembler "mov\tr0, r4" } } */
+/* { dg-final { scan-assembler "mov\tr1, r4" } } */
+/* { dg-final { scan-assembler "mov\tr2, r4" } } */
+/* { dg-final { scan-assembler "mov\tr3, r4" } } */
+
+/* Now we check that we use the correct intrinsic to call.  */
+/* { dg-final { scan-assembler "bl\t__gnu_cmse_nonsecure_call" } } */
+
diff --git a/gcc/testsuite/gcc.target/arm/cmse/mainline/softfp/cmse-8.c b/gcc/testsuite/gcc.target/arm/cmse/mainline/softfp/cmse-8.c
new file mode 100644
index 0000000000000000000000000000000000000000..ffe94de85417b81f9dcb366eb1b40dc1661c91b7
--- /dev/null
+++ b/gcc/testsuite/gcc.target/arm/cmse/mainline/softfp/cmse-8.c
@@ -0,0 +1,25 @@ 
+/* { dg-do compile } */
+/* { dg-require-effective-target arm_arch_v8m_main_ok } */
+/* { dg-add-options arm_arch_v8m_main } */
+/* { dg-skip-if "Do not combine float-abi= hard | soft | softfp" {*-*-*} {"-mfloat-abi=soft" -mfloat-abi=hard } {""} } */
+/* { dg-skip-if "Skip these if testing single precision" {*-*-*} {"-mfpu=*-sp-*"} {""} } */
+/* { dg-options "-mcmse -mfloat-abi=softfp -mfpu=fpv5-d16" }  */
+
+int __attribute__ ((cmse_nonsecure_call)) (*bar) (double);
+
+int
+foo (int a)
+{
+  return bar (2.0) + a + 1;
+}
+
+/* Checks for saving and clearing prior to function call.  */
+/* { dg-final { scan-assembler "lsrs\tr4, r4, #1" } } */
+/* { dg-final { scan-assembler "lsls\tr4, r4, #1" } } */
+/* { dg-final { scan-assembler-not "mov\tr0, r4" } } */
+/* { dg-final { scan-assembler-not "mov\tr1, r4" } } */
+/* { dg-final { scan-assembler "mov\tr2, r4" } } */
+/* { dg-final { scan-assembler "mov\tr3, r4" } } */
+
+/* Now we check that we use the correct intrinsic to call.  */
+/* { dg-final { scan-assembler "bl\t__gnu_cmse_nonsecure_call" } } */
diff --git a/gcc/testsuite/gcc.target/arm/cmse/mainline/union-1.c b/gcc/testsuite/gcc.target/arm/cmse/mainline/union-1.c
new file mode 100644
index 0000000000000000000000000000000000000000..1fc846cd7a51303ec00f8f512a54cd697fbd0682
--- /dev/null
+++ b/gcc/testsuite/gcc.target/arm/cmse/mainline/union-1.c
@@ -0,0 +1,69 @@ 
+/* { dg-do compile } */
+/* { dg-options "-mcmse" } */
+
+typedef struct
+{
+  unsigned char	  a :2;
+  unsigned char	    :0;
+  unsigned short  b :5;
+  unsigned char	    :0;
+  unsigned short  c :3;
+  unsigned char	    :0;
+  unsigned int	  d :9;
+} test_st_1;
+
+typedef struct
+{
+  unsigned short  a :7;
+  unsigned char	    :0;
+  unsigned char	  b :1;
+  unsigned char	    :0;
+  unsigned short  c :6;
+} test_st_2;
+
+typedef union
+{
+  test_st_1 st_1;
+  test_st_2 st_2;
+}test_un;
+
+typedef union
+{
+  test_un un;
+  struct
+    {
+      unsigned int v1;
+      unsigned int v2;
+      unsigned int v3;
+      unsigned int v4;
+    }values;
+} read_un;
+
+
+typedef void __attribute__ ((cmse_nonsecure_call)) (*foo_ns) (test_un);
+
+int
+main (void)
+{
+  read_un r;
+  foo_ns f;
+
+  f = (foo_ns) 0x200000;
+  r.values.v1 = 0xFFFFFFFF;
+  r.values.v2 = 0xFFFFFFFF;
+
+  f (r.un);
+  return 0;
+}
+
+/* { dg-final { scan-assembler "movw\tip, #8063" } } */
+/* { dg-final { scan-assembler "movt\tip, 63" } } */
+/* { dg-final { scan-assembler "and\tr0, r0, ip" } } */
+/* { dg-final { scan-assembler "movw\tip, #511" } } */
+/* { dg-final { scan-assembler "and\tr1, r1, ip" } } */
+/* { dg-final { scan-assembler "lsrs\tr4, r4, #1" } } */
+/* { dg-final { scan-assembler "lsls\tr4, r4, #1" } } */
+/* { dg-final { scan-assembler "mov\tr2, r4" } } */
+/* { dg-final { scan-assembler "mov\tr3, r4" } } */
+/* { dg-final { scan-assembler "bl\t__gnu_cmse_nonsecure_call" } } */
+
diff --git a/gcc/testsuite/gcc.target/arm/cmse/mainline/union-2.c b/gcc/testsuite/gcc.target/arm/cmse/mainline/union-2.c
new file mode 100644
index 0000000000000000000000000000000000000000..420d0f136ef171111c1cca6cd24c4f46b9fcb7fc
--- /dev/null
+++ b/gcc/testsuite/gcc.target/arm/cmse/mainline/union-2.c
@@ -0,0 +1,84 @@ 
+/* { dg-do compile } */
+/* { dg-options "-mcmse" } */
+
+typedef struct
+{
+  unsigned char	  a :2;
+  unsigned char	    :0;
+  unsigned short  b :5;
+  unsigned char	    :0;
+  unsigned short  c :3;
+  unsigned char	    :0;
+  unsigned int	  d :9;
+} test_st_1;
+
+typedef struct
+{
+  unsigned short  a :7;
+  unsigned char	    :0;
+  unsigned char	  b :1;
+  unsigned char	    :0;
+  unsigned short  c :6;
+} test_st_2;
+
+typedef struct
+{
+  unsigned char	  a;
+  unsigned int	    :0;
+  unsigned int	  b :1;
+  unsigned short    :0;
+  unsigned short  c;
+  unsigned int	    :0;
+  unsigned int	  d :21;
+} test_st_3;
+
+typedef union
+{
+  test_st_1 st_1;
+  test_st_2 st_2;
+  test_st_3 st_3;
+}test_un;
+
+typedef union
+{
+  test_un un;
+  struct
+    {
+      unsigned int v1;
+      unsigned int v2;
+      unsigned int v3;
+      unsigned int v4;
+    }values;
+} read_un;
+
+
+typedef void __attribute__ ((cmse_nonsecure_call)) (*foo_ns) (test_un);
+
+int
+main (void)
+{
+  read_un r;
+  foo_ns f;
+
+  f = (foo_ns) 0x200000;
+  r.values.v1 = 0xFFFFFFFF;
+  r.values.v2 = 0xFFFFFFFF;
+  r.values.v3 = 0xFFFFFFFF;
+
+  f (r.un);
+  return 0;
+}
+
+/* { dg-final { scan-assembler "movw\tip, #8191" } } */
+/* { dg-final { scan-assembler "movt\tip, 63" } } */
+/* { dg-final { scan-assembler "and\tr0, r0, ip" } } */
+/* { dg-final { scan-assembler "movw\tip, #511" } } */
+/* { dg-final { scan-assembler "movt\tip, 65535" } } */
+/* { dg-final { scan-assembler "and\tr1, r1, ip" } } */
+/* { dg-final { scan-assembler "movw\tip, #65535" } } */
+/* { dg-final { scan-assembler "movt\tip, 31" } } */
+/* { dg-final { scan-assembler "and\tr2, r2, ip" } } */
+/* { dg-final { scan-assembler "lsrs\tr4, r4, #1" } } */
+/* { dg-final { scan-assembler "lsls\tr4, r4, #1" } } */
+/* { dg-final { scan-assembler "mov\tr3, r4" } } */
+/* { dg-final { scan-assembler "bl\t__gnu_cmse_nonsecure_call" } } */
diff --git a/libgcc/config/arm/cmse_nonsecure_call.S b/libgcc/config/arm/cmse_nonsecure_call.S
new file mode 100644
index 0000000000000000000000000000000000000000..bddbfe714da81291f7bde4d4a8f7da4350149b85
--- /dev/null
+++ b/libgcc/config/arm/cmse_nonsecure_call.S
@@ -0,0 +1,136 @@ 
+/* CMSE wrapper function used to save, clear and restore callee saved registers
+   for cmse_nonsecure_call's.
+
+   Copyright (C) 2016 Free Software Foundation, Inc.
+   Contributed by ARM Ltd.
+
+   This file is free software; you can redistribute it and/or modify it
+   under the terms of the GNU General Public License as published by the
+   Free Software Foundation; either version 3, or (at your option) any
+   later version.
+
+   This file is distributed in the hope that it will be useful, but
+   WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   General Public License for more details.
+
+   Under Section 7 of GPL version 3, you are granted additional
+   permissions described in the GCC Runtime Library Exception, version
+   3.1, as published by the Free Software Foundation.
+
+   You should have received a copy of the GNU General Public License and
+   a copy of the GCC Runtime Library Exception along with this program;
+   see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+   <http://www.gnu.org/licenses/>.  */
+
+.syntax unified
+.thumb
+.global __gnu_cmse_nonsecure_call
+__gnu_cmse_nonsecure_call:
+#if defined(__ARM_ARCH_8M_MAIN__)
+push	    {r5-r11,lr}
+mov	    r5, r4
+mov	    r6, r4
+mov	    r7, r4
+mov	    r8, r4
+mov	    r9, r4
+mov	    r10, r4
+mov	    r11, r4
+mov	    ip, r4
+
+/* Save and clear callee-saved registers only if we are dealing with hard float
+   ABI.  The unused caller-saved registers have already been cleared by GCC
+   generated code.  */
+#ifdef __ARM_PCS_VFP
+vpush.f64   {d8-d15}
+#if __ARM_FP & 0x04
+vmov.f32    s16, #1.00000
+vmov.f32    s17, #1.00000
+vmov.f32    s18, #1.00000
+vmov.f32    s19, #1.00000
+vmov.f32    s20, #1.00000
+vmov.f32    s21, #1.00000
+vmov.f32    s22, #1.00000
+vmov.f32    s23, #1.00000
+vmov.f32    s24, #1.00000
+vmov.f32    s25, #1.00000
+vmov.f32    s26, #1.00000
+vmov.f32    s27, #1.00000
+vmov.f32    s28, #1.00000
+vmov.f32    s29, #1.00000
+vmov.f32    s30, #1.00000
+vmov.f32    s31, #1.00000
+#elif __ARM_FP & 0x08
+vmov.f64    d8, #1.00000
+vmov.f64    d9, #1.00000
+vmov.f64    d10, #1.00000
+vmov.f64    d11, #1.00000
+vmov.f64    d12, #1.00000
+vmov.f64    d13, #1.00000
+vmov.f64    d14, #1.00000
+vmov.f64    d15, #1.00000
+#else
+#error "Half precision implementation not supported."
+#endif
+vmsr	    fpscr, r4
+
+/* We are not dealing with hard float ABI, so we can safely use the vlstm and
+   vlldm instructions without needing to preserve the registers used for
+   argument passing.  */
+#else
+sub	    sp, sp, #0x88 /* Reserve stack space to save all floating point
+			     registers, including FPSCR.  */
+vlstm	    sp		  /* Lazy store and clearance of d0-d16 and FPSCR.  */
+#endif /* __ARM_PCS_VFP */
+
+/* Make sure to clear the 'GE' bits of the APSR register if 32-bit SIMD
+   instructions are available.  */
+#if defined(__ARM_FEATURE_SIMD32)
+msr	    APSR_nzcvqg, r4
+#else
+msr	    APSR_nzcvq, r4
+#endif
+
+blxns	    r4
+
+#ifdef __ARM_PCS_VFP
+vpop.f64    {d8-d15}
+#else
+vlldm	    sp		  /* Lazy restore of d0-d16 and FPSCR.  */
+add	    sp, sp, #0x88 /* Free space used to save floating point registers.  */
+#endif /* __ARM_PCS_VFP */
+
+pop	    {r5-r11}
+
+#elif defined (__ARM_ARCH_8M_BASE__)
+push	    {r5-r7}
+mov	    r5, r8
+mov	    r6, r9
+mov	    r7, r10
+push	    {r5-r7}
+mov	    r5, r11
+mov	    r6, lr
+push	    {r5,r6}
+mov	    r5, r4
+mov	    r6, r4
+mov	    r7, r4
+mov	    r8, r4
+mov	    r9, r4
+mov	    r10, r4
+mov	    r11, r4
+mov	    ip, r4
+msr	    APSR_nzcvq, r4
+blxns	    r4
+pop	    {r5, r6}
+mov	    lr, r6
+mov	    r11, r5
+pop	    {r5-r7}
+mov	    r10, r7
+mov	    r9, r6
+mov	    r8, r5
+pop	    {r5-r7}
+blx	    lr
+
+#else
+#error "This should only be used for armv8-m base- and mainline."
+#endif
diff --git a/libgcc/config/arm/t-arm b/libgcc/config/arm/t-arm
index 5618143bfd0f02b170db3f9e4c0a15cecb403cec..9e85ac06b146feaa14ab83374a0156737b870310 100644
--- a/libgcc/config/arm/t-arm
+++ b/libgcc/config/arm/t-arm
@@ -12,4 +12,6 @@  libgcc-objects += cmse.o cmse_nonsecure_call.o
 
 cmse.o: $(srcdir)/config/arm/cmse.c
 	$(gcc_compile) -c $(CMSE_OPTS) $<
+cmse_nonsecure_call.o: $(srcdir)/config/arm/cmse_nonsecure_call.S
+		       $(gcc_compile) -c $<
 endif