Emit .note.GNU-stack for soft-float linux targets.

gcc/ChangeLog:

2020-01-23  Dragan Mladjenovic  <dmladjenovic@wavecomp.com>

	* config/mips/linux.h (NEED_INDICATE_EXEC_STACK): Define to
	TARGET_SOFT_FLOAT.
	* config/mips/mips.c (TARGET_ASM_FILE_END): Define to ...
	(mips_asm_file_end): New function. Delegate to
	file_end_indicate_exec_stack if NEED_INDICATE_EXEC_STACK is true.
	* config/mips/mips.h (NEED_INDICATE_EXEC_STACK): Define to 0.

libgcc/ChangeLog:

2020-01-23  Dragan Mladjenovic  <dmladjenovic@wavecomp.com>

	* config/mips/gnustack.h: New file.
	* config/mips/crti.S: Include gnustack.h.
	* config/mips/crtn.S: Likewise.
	* config/mips/mips16.S: Likewise.
	* config/mips/vr4120-div.S: Likewise.

gcc/ChangeLog

+2020-01-23  Dragan Mladjenovic  <dmladjenovic@wavecomp.com>
+
+	* config/mips/linux.h (NEED_INDICATE_EXEC_STACK): Define to
+	TARGET_SOFT_FLOAT.
+	* config/mips/mips.c (TARGET_ASM_FILE_END): Define to ...
+	(mips_asm_file_end): New function. Delegate to
+	file_end_indicate_exec_stack if NEED_INDICATE_EXEC_STACK is true.
+	* config/mips/mips.h (NEED_INDICATE_EXEC_STACK): Define to 0.
+
 2020-01-23  Jakub Jelinek  <jakub@redhat.com>
 
 	PR target/93376

gcc/config/mips/linux.h

@@ -50,3 +50,7 @@ along with GCC; see the file COPYING3.  If not see
 #define GNU_USER_DYNAMIC_LINKERN32 \
   CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKERN32, UCLIBC_DYNAMIC_LINKERN32, \
                          BIONIC_DYNAMIC_LINKERN32, MUSL_DYNAMIC_LINKERN32)
+
+#undef NEED_INDICATE_EXEC_STACK
+
+#define NEED_INDICATE_EXEC_STACK TARGET_SOFT_FLOAT

gcc/config/mips/mips.c

@@ -22550,6 +22550,13 @@ mips_starting_frame_offset (void)
     return 0;
   return crtl->outgoing_args_size + MIPS_GP_SAVE_AREA_SIZE;
 }
+
+static void
+mips_asm_file_end (void)
+{
+  if (NEED_INDICATE_EXEC_STACK)
+    file_end_indicate_exec_stack ();
+}
 
 /* Initialize the GCC target structure.  */
 #undef TARGET_ASM_ALIGNED_HI_OP
@@ -22857,6 +22864,10 @@ mips_starting_frame_offset (void)
 #undef TARGET_STARTING_FRAME_OFFSET
 #define TARGET_STARTING_FRAME_OFFSET mips_starting_frame_offset
 
+#undef TARGET_ASM_FILE_END
+#define TARGET_ASM_FILE_END mips_asm_file_end
+
+
 struct gcc_target targetm = TARGET_INITIALIZER;
 
 #include "gt-mips.h"

gcc/config/mips/mips.h

@@ -3438,3 +3438,5 @@ struct GTY(())  machine_function {
   (TARGET_LOAD_STORE_PAIRS \
    && (TUNE_P5600 || TUNE_I6400 || TUNE_P6600) \
    && !TARGET_MICROMIPS && !TARGET_FIX_24K)
+
+#define NEED_INDICATE_EXEC_STACK 0

libgcc/ChangeLog

+2020-01-23  Dragan Mladjenovic  <dmladjenovic@wavecomp.com>
+
+	* config/mips/gnustack.h: New file.
+	* config/mips/crti.S: Include gnustack.h.
+	* config/mips/crtn.S: Likewise.
+	* config/mips/mips16.S: Likewise.
+	* config/mips/vr4120-div.S: Likewise.
+
 2020-01-23  Martin Liska  <mliska@suse.cz>
 
 	* libgcov-driver.c (prune_topn_counter): Remove

libgcc/config/mips/crti.S

@@ -21,6 +21,9 @@ 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/>.  */
 
+/* An executable stack is *not* required for these functions.  */
+#include "gnustack.h"
+
 /* 4 slots for argument spill area.  1 for cpreturn, 1 for stack.
    Return spill offset of 40 and 20.  Aligned to 16 bytes for n32.  */
 

libgcc/config/mips/crtn.S

@@ -21,6 +21,9 @@ 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/>.  */
 
+/* An executable stack is *not* required for these functions.  */
+#include "gnustack.h"
+
 /* 4 slots for argument spill area.  1 for cpreturn, 1 for stack.
    Return spill offset of 40 and 20.  Aligned to 16 bytes for n32.  */
 

libgcc/config/mips/gnustack.h

+#include "config.h"
+#if defined(__ELF__) && defined(__linux__)
+#if defined (__mips_soft_float)
+	.section .note.GNU-stack,"",%progbits
+	.previous
+#endif
+#endif

libgcc/config/mips/mips16.S

@@ -21,6 +21,9 @@ 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/>.  */
 
+/* An executable stack is *not* required for these functions.  */
+#include "gnustack.h"
+
 #include "auto-host.h"
 
 #if defined(__mips_micromips) || defined(__mips_soft_float) \

libgcc/config/mips/vr4120-div.S

@@ -22,6 +22,9 @@ 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/>.  */
 
+/* An executable stack is *not* required for these functions.  */
+#include "gnustack.h"
+
 /* This file contains functions which implement divsi3 and modsi3 for
    -mfix-vr4120.  div and ddiv do not give the correct result when one
    of the operands is negative.  */