Changeset b169619 in mainline for common/stdc/cc.h

Timestamp:

2023-10-27T17:38:32Z (7 months ago)

Author:

Jiří Zárevúcky <zarevucky.jiri@…>

Branches:

master, topic/msim-upgrade, topic/simplify-dev-export

Children:

44e8541

Parents:

c89ae25

git-author:

Jiří Zárevúcky <zarevucky.jiri@…> (2023-10-27 13:19:20)

git-committer:

Jiří Zárevúcky <zarevucky.jiri@…> (2023-10-27 17:38:32)

Message:

Deduplicate mem functions

There are a number of functions which are copied between
kernel, libc, and potentially boot too. mem*() functions
are first such offenders. All this duplicate code will
be moved to directory 'common'.

File:

• common/stdc/cc.h (moved) (moved from boot/generic/include/memstr.h ) (2 diffs)

common/stdc/cc.h

@@ -1 +1 @@
 /*
- * Copyright (c) 2001-2004 Jakub Jermar
+ * Copyright (c) 2013 Vojtech Horky
  * All rights reserved.
  *
@@ -27 +27 @@
  */
 
+/** @addtogroup libc
+ * @{
+ */
 /** @file
+ * Macros related to used compiler (such as GCC-specific attributes).
  */
 
-#ifndef BOOT_MEMSTR_H_
-#define BOOT_MEMSTR_H_
+#ifndef _LIBC_CC_H_
+#define _LIBC_CC_H_
 
-#include <stddef.h>
+#ifndef __clang__
+#define ATTRIBUTE_OPTIMIZE(opt) \
+    __attribute__ ((optimize(opt)))
+#else
+#define ATTRIBUTE_OPTIMIZE(opt)
+#endif
 
-extern void *memcpy(void *, const void *, size_t)
-    __attribute__((nonnull(1, 2)))
-    __attribute__((optimize("-fno-tree-loop-distribute-patterns")));
-extern void *memset(void *, int, size_t)
-    __attribute__((nonnull(1)))
-    __attribute__((optimize("-fno-tree-loop-distribute-patterns")));
-extern void *memmove(void *, const void *, size_t)
-    __attribute__((nonnull(1, 2)));
+#define ATTRIBUTE_OPTIMIZE_NO_TLDP \
+    ATTRIBUTE_OPTIMIZE("-fno-tree-loop-distribute-patterns")
+
+#ifdef CONFIG_LTO
+#define DO_NOT_DISCARD __attribute__ ((used))
+#else
+#define DO_NOT_DISCARD
+#endif
 
 #endif