Create local C library implementation (1/2)

- This change is split into two separate patches in order to
  simplify the history as interpreted by 'git'. The split is
  between the move/rename and addition of new files.
- Remove dependency on toolchain C library headers and functions in
  order to ensure behavioural compatibility between toolchains.
- Use FreeBSD as reference for C library implementation.
- Do not let GCC use default library include paths.
- Remove unused definitions in modified headers and implementations.
- Move C library files to 'lib/stdlib' and 'include/stdlib'.
- Break std.c functions out into separate files.

Change-Id: I91cddfb3229775f770ad781589670c57d347a154

1 files changed, 0 insertions, 103 deletions

diff --git a/lib/non-semihosting/mem.c b/lib/non-semihosting/mem.c
deleted file mode 100644
index e072710b..00000000
--- a/lib/non-semihosting/mem.c
+++ /dev/null
@@ -1,103 +0,0 @@
-/*
- * Copyright (c) 2013, ARM Limited and Contributors. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * Redistributions of source code must retain the above copyright notice, this
- * list of conditions and the following disclaimer.
- *
- * Redistributions in binary form must reproduce the above copyright notice,
- * this list of conditions and the following disclaimer in the documentation
- * and/or other materials provided with the distribution.
- *
- * Neither the name of ARM nor the names of its contributors may be used
- * to endorse or promote products derived from this software without specific
- * prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
- * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include <stddef.h> /* size_t */
-
-/*
- * Fill @count bytes of memory pointed to by @dst with @val
- */
-void *memset(void *dst, int val, size_t count)
-{
-	char *ptr = dst;
-
-	while (count--)
-		*ptr++ = val;
-
-	return dst;
-}
-
-/*
- * Compare @len bytes of @s1 and @s2
- */
-int memcmp(const void *s1, const void *s2, size_t len)
-{
-	const char *s = s1;
-	const char *d = s2;
-	char dc;
-	char sc;
-
-	while (len--) {
-		sc = *s++;
-		dc = *d++;
-		if (sc - dc)
-			return (sc - dc);
-	}
-
-	return 0;
-}
-
-
-/*
- * Move @len bytes from @src to @dst
- */
-void *memmove(void *dst, const void *src, size_t len)
-{
-	const char *s = src;
-	char *d = dst;
-
-	while (len--)
-		*d++ = *s++;
-	return d;
-}
-
-/*
- * Copy @len bytes from @src to @dst
- */
-void *memcpy(void *dst, const void *src, size_t len)
-{
-	return memmove(dst, src, len);
-}
-
-
-/*
- * Scan @len bytes of @src for value @c
- */
-void *memchr(const void *src, int c, size_t len)
-{
-	const char *s = src;
-
-	while (len--) {
-		if (*s == c)
-			return (void *) s;
-		s++;
-	}
-
-	return NULL;
-}