From 04b119a61ee614d6475edfb3a1e84ce5989f0d55 Mon Sep 17 00:00:00 2001
From: Angus Gratton <gus@projectgus.com>
Date: Thu, 30 Jun 2016 08:18:10 +1000
Subject: [PATCH] Seed libc PRNG from hardware RNG on reset
---
core/app_main.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/core/app_main.c b/core/app_main.c
index a38fb5f..ebf9e9a 100644
--- a/core/app_main.c
+++ b/core/app_main.c
@@ -21,6 +21,7 @@
#include "esp/spi_regs.h"
#include "esp/dport_regs.h"
#include "esp/wdev_regs.h"
+#include "esp/hwrand.h"
#include "os_version.h"
#include "espressif/esp_common.h"
@@ -378,6 +379,8 @@ static __attribute__((noinline)) void user_start_phase2(void) {
init_networking(&phy_info, sdk_info.sta_mac_addr);
+ srand(hwrand()); /* seed libc rng */
+
// Call gcc constructor functions
void (**ctor)(void);
for ( ctor = &__init_array_start; ctor != &__init_array_end; ++ctor) {