change(esp_libc): rename newlib component to esp_libc

components/esp_libc/src/getentropy.c

@@ -0,0 +1,36 @@
+/*
+ * SPDX-FileCopyrightText: 2023-2024 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <sys/random.h>
+#include <errno.h>
+#include <stddef.h>
+
+int getentropy(void *buffer, size_t length)
+{
+    ssize_t ret;
+
+    if (buffer == NULL) {
+        errno = EFAULT;
+        return -1;
+    }
+
+    if (length > 256) {
+        errno = EIO;
+        return -1;
+    }
+
+    ret = getrandom(buffer, length, 0);
+    if (ret == -1) {
+        return -1;
+    }
+
+    return 0;
+}
+
+void esp_libc_include_getentropy_impl(void)
+{
+    // Linker hook, exists for no other purpose
+}