Combine brk() with sbrk(); modify brk() to update the sbrk(0) value.

plat/linux/libsys/brk.c

@@ -1,17 +0,0 @@
-/* $Source: /cvsroot/tack/Ack/plat/linux386/libsys/brk.c,v $
- * $State: Exp $
- * $Revision: 1.1 $
- */
-
-#include <stdlib.h>
-#include <unistd.h>
-#include <errno.h>
-#include "libsys.h"
-
-int brk(void* end)
-{
-	int e = _syscall(__NR_brk, (quad) end, 0, 0);
-	if (e == -1)
-		errno = ENOMEM;
-	return e;
-}

plat/linux/libsys/sbrk.c

@@ -12,6 +12,16 @@
 
 static char* current = NULL;
  
+int brk(void* end)
+{
+	int e = _syscall(__NR_brk, (quad) end, 0, 0);
+	if (e == -1)
+		errno = ENOMEM;
+	else
+		current = end;
+	return e;
+}
+
 void* sbrk(intptr_t increment)
 {
 	char* old;