First push after merge, split and enhance both zOS and zputa

include/malloc.h

@@ -0,0 +1,66 @@
+/*
+ * malloc.h
+ *
+ * Internals for the memory allocator
+ */
+
+// #include <stdint.h>
+#include <stddef.h>
+// #include <klibc/sysconfig.h>
+#define _KLIBC_MALLOC_CHUNK_SIZE 65536
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*
+ * This structure should be a power of two.  This becomes the
+ * alignment unit.
+ */
+struct free_arena_header;
+
+struct arena_header {
+	size_t type;
+	size_t size;
+	struct free_arena_header *next, *prev;
+};
+
+#ifdef DEBUG_MALLOC
+#define ARENA_TYPE_USED 0x64e69c70
+#define ARENA_TYPE_FREE 0x012d610a
+#define ARENA_TYPE_HEAD 0x971676b5
+#define ARENA_TYPE_DEAD 0xeeeeeeee
+#else
+#define ARENA_TYPE_USED 0
+#define ARENA_TYPE_FREE 1
+#define ARENA_TYPE_HEAD 2
+#endif
+
+#define MALLOC_CHUNK_MASK (_KLIBC_MALLOC_CHUNK_SIZE-1)
+
+#define ARENA_SIZE_MASK (~(sizeof(struct arena_header)-1))
+
+/*
+ * This structure should be no more than twice the size of the
+ * previous structure.
+ */
+struct free_arena_header {
+	struct arena_header a;
+	struct free_arena_header *next_free, *prev_free;
+};
+
+extern char heap_low, heap_top;	// Take the addresses of these.
+
+void malloc_add(void *p,size_t size);
+
+void *malloc(size_t);
+void free(void *m);
+
+#ifdef __cplusplus
+}
+#endif
+
+/*
+ * Internal variable used by brk/sbrk
+ */
+// extern char *__current_brk;