bare-linux/bare-io.c: added missing lib functions

Maybe we should consider some generic lib, as most of this can be shared across freestanding archs (we must check whether other freestanding places are really so lib-less os they have these minimal functions for example from newlib) Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

bare-linux/bare-io.c: added missing lib functions
Maybe we should consider some generic lib, as most of this can be shared across freestanding archs (we must check whether other freestanding places are really so lib-less os they have these minimal functions for example from newlib) Signed-off-by: Alessandro Rubini <rubini@gnudd.com>
1ccf1d9e · Alessandro Rubini · Aurelio Colosimo · e5d7101f · 1ccf1d9e
Commit 1ccf1d9e authored Jan 06, 2012 by Alessandro Rubini Committed by Aurelio Colosimo Jan 09, 2012
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bare-io.c arch-bare-linux/bare-io.c +21 -14

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--- a/arch-bare-linux/bare-io.c
+++ b/arch-bare-linux/bare-io.c
 /*
- * Alessandro Rubini for CERN, 2011 -- public domain
+ * Alessandro Rubini for CERN, 2011 -- GPL 2 or later (it includes u-boot code)
 */
 #include <pptp/pptp.h>
 #include "bare-linux.h"
@@ -33,18 +33,19 @@ void pp_get_stamp(uint32_t *sptr)
 	*sptr = htonl(sys_time(0));
 }

-/* What follows has no prefix because it's only used by arch code */
-char *strcpy(char *dest, const char *src)
+int pp_memcmp(const void *cs, const void *ct, int count)
 {
 	/* from u-boot-1.1.2 */
-	char *tmp = dest;
+	const unsigned char *su1, *su2;
+	int res = 0;

-	while ((*dest++ = *src++) != '\0')
-		/* nothing */;
-	return tmp;
+	for( su1 = cs, su2 = ct; 0 < count; ++su1, ++su2, count--)
+		if ((res = *su1 - *su2) != 0)
+			break;
+	return res;
 }

-void *memset(void *s, int c, int count)
+void *pp_memset(void *s, int c, int count)
 {
 	/* from u-boot-1.1.2 */
 	char *xs = (char *) s;
@@ -55,13 +56,19 @@ void *memset(void *s, int c, int count)
 	return s;
 }

-void *memcpy(void *dest, const void *src, int count)
+/* What follows has no prefix because it's only used by arch code */
+char *strcpy(char *dest, const char *src)
 {
 	/* from u-boot-1.1.2 */
-	char *tmp = (char *) dest, *s = (char *) src;
-
-	while (count--)
-		*tmp++ = *s++;
+	char *tmp = dest;

-	return dest;
+	while ((*dest++ = *src++) != '\0')
+		/* nothing */;
+	return tmp;
 }
+
+void *memset(void *s, int c, int count)
+	__attribute__((alias("pp_memset")));
+
+void *memcpy(void *dest, const void *src, int count)
+	__attribute__((alias("pp_memcpy")));