1 files changed, 48 insertions, 0 deletions
diff --git a/src/nolibc.c b/src/nolibc.c
new file mode 100644
index 0000000..9a04ead
--- /dev/null
+++ b/src/nolibc.c
@@ -0,0 +1,48 @@
+/* SPDX-License-Identifier: MIT */
+
+#ifndef CONFIG_NOLIBC
+#error "This file should only be compiled for no libc build"
+#endif
+
+#include "lib.h"
+#include "syscall.h"
+
+void *memset(void *s, int c, size_t n)
+{
+	size_t i;
+	unsigned char *p = s;
+
+	for (i = 0; i < n; i++)
+		p[i] = (unsigned char) c;
+
+	return s;
+}
+
+struct uring_heap {
+	size_t		len;
+	char		user_p[] __attribute__((__aligned__));
+};
+
+void *__uring_malloc(size_t len)
+{
+	struct uring_heap *heap;
+
+	heap = __sys_mmap(NULL, sizeof(*heap) + len, PROT_READ | PROT_WRITE,
+			  MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
+	if (IS_ERR(heap))
+		return NULL;
+
+	heap->len = sizeof(*heap) + len;
+	return heap->user_p;
+}
+
+void __uring_free(void *p)
+{
+	struct uring_heap *heap;
+
+	if (uring_unlikely(!p))
+		return;
+
+	heap = container_of(p, struct uring_heap, user_p);
+	__sys_munmap(heap, heap->len);
+}