0009-WIP-xtensa-fix-_mcount-call-for-CALL0-ABI.patch

From c73b720ae2759c70a4c657962e0bcb40c42fd9bc Mon Sep 17 00:00:00 2001
From: Max Filippov <jcmvbkbc@gmail.com>
Date: Sun, 9 Nov 2014 06:26:29 +0300
Subject: [PATCH 09/16] WIP: xtensa: fix _mcount call for CALL0 ABI

_mcount is not specified, let's call it with return address in a10, and
require it to preserve all registers.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
---
 gcc/config/xtensa/xtensa.h | 21 +++------------------
 1 file changed, 3 insertions(+), 18 deletions(-)

diff --git a/gcc/config/xtensa/xtensa.h b/gcc/config/xtensa/xtensa.h
index f7e22ce..653631e 100644
--- a/gcc/config/xtensa/xtensa.h
+++ b/gcc/config/xtensa/xtensa.h
@@ -601,32 +601,17 @@ typedef struct xtensa_args
 
 #define NO_PROFILE_COUNTERS	1
 
-#if TARGET_WINDOWED_ABI
 #define FUNCTION_PROFILER(FILE, LABELNO) \
   do {									\
     fprintf (FILE, "\t%s\ta10, a0\n", TARGET_DENSITY ? "mov.n" : "mov"); \
     if (flag_pic)							\
       {									\
-	fprintf (FILE, "\tmovi\ta8, _mcount@PLT\n");			\
-	fprintf (FILE, "\tcallx8\ta8\n");				\
-      }									\
-    else								\
-      fprintf (FILE, "\tcall8\t_mcount\n");				\
-  } while (0)
-#else
-#define FUNCTION_PROFILER(FILE, LABELNO) \
-  do {									\
-    fprintf (FILE, "\t%s\ta2, a0\n", TARGET_DENSITY ? "mov.n" : "mov"); \
-    /* TODO save incoming args? */					\
-    if (flag_pic)							\
-      {									\
-	fprintf (FILE, "\tmovi\ta0, _mcount@PLT\n");			\
-	fprintf (FILE, "\tcallx0\ta0\n");				\
+	fprintf (FILE, "\tmovi\ta%d, _mcount@PLT\n", WINDOW_SIZE);	\
+	fprintf (FILE, "\tcallx%d\ta%d\n", WINDOW_SIZE, WINDOW_SIZE);	\
       }									\
     else								\
-      fprintf (FILE, "\tcall0\t_mcount\n");				\
+      fprintf (FILE, "\tcall%d\t_mcount\n", WINDOW_SIZE);		\
   } while (0)
-#endif
 
 /* Stack pointer value doesn't matter at exit.  */
 #define EXIT_IGNORE_STACK 1
-- 
1.8.1.4