diff --git a/hardware/arduino/esp8266/cores/esp8266/main.cpp b/hardware/arduino/esp8266/cores/esp8266/main.cpp
index 7a2c26273..4d69c2f48 100644
--- a/hardware/arduino/esp8266/cores/esp8266/main.cpp
+++ b/hardware/arduino/esp8266/cores/esp8266/main.cpp
@@ -46,6 +46,11 @@ extern void (*__init_array_end)(void);
 static cont_t g_cont;
 static os_event_t g_loop_queue[LOOP_QUEUE_SIZE];
 
+extern "C" void abort()
+{
+    while(1){}
+}
+
 extern "C" void esp_yield()
 {
     cont_yield(&g_cont);
diff --git a/hardware/arduino/esp8266/cores/esp8266/new.cpp b/hardware/arduino/esp8266/cores/esp8266/new.cpp
index cf6f89c17..b7d8f4d84 100644
--- a/hardware/arduino/esp8266/cores/esp8266/new.cpp
+++ b/hardware/arduino/esp8266/cores/esp8266/new.cpp
@@ -17,20 +17,27 @@
 */
 
 #include <stdlib.h>
+extern "C" {
+#include "ets_sys.h"
+#include "os_type.h"
+#include "osapi.h"
+#include "mem.h"
+#include "user_interface.h"
+}
 
 void *operator new(size_t size) {
-  return malloc(size);
+  return os_malloc(size);
 }
 
 void *operator new[](size_t size) {
-  return malloc(size);
+  return os_malloc(size);
 }
 
 void operator delete(void * ptr) {
-  free(ptr);
+  os_free(ptr);
 }
 
 void operator delete[](void * ptr) {
-  free(ptr);
+  os_free(ptr);
 }
 
diff --git a/hardware/arduino/esp8266/cores/esp8266/stdlib_noniso.c b/hardware/arduino/esp8266/cores/esp8266/stdlib_noniso.c
index 6b623310e..5349d12c0 100644
--- a/hardware/arduino/esp8266/cores/esp8266/stdlib_noniso.c
+++ b/hardware/arduino/esp8266/cores/esp8266/stdlib_noniso.c
@@ -1,37 +1,47 @@
 #include <stdlib.h>
 #include "stdlib_noniso.h"
 
-char *   itoa (int val, char *s, int radix)
+long atol_internal(const char* s)
+{
+  return 0;
+}
+
+float atof_internal(const char* s)
+{
+  return 0;
+}
+
+char * itoa (int val, char *s, int radix)
 {
   *s = 0;
   return s;
 }
 
-char *   ltoa (long val, char *s, int radix)
+char * ltoa (long val, char *s, int radix)
 {
   *s = 0;
   return s;
 }
  
-char *  utoa (unsigned int val, char *s, int radix)
+char * utoa (unsigned int val, char *s, int radix)
 {
   *s = 0;
   return s;
 }
  
-char *  ultoa (unsigned long val, char *s, int radix)
+char * ultoa (unsigned long val, char *s, int radix)
 {
   *s = 0;
   return s;
 }
 
-char *  dtostre (double __val, char *__s, unsigned char __prec, unsigned char __flags)
+char * dtostre (double __val, char *__s, unsigned char __prec, unsigned char __flags)
 {
   *__s = 0;
   return __s;
 }
  
-char *  dtostrf (double __val, signed char __width, unsigned char __prec, char *__s)
+char * dtostrf (double __val, signed char __width, unsigned char __prec, char *__s)
 {
    *__s = 0;
    return __s;
diff --git a/hardware/arduino/esp8266/cores/esp8266/stdlib_noniso.h b/hardware/arduino/esp8266/cores/esp8266/stdlib_noniso.h
index c2bd41bba..a61447816 100644
--- a/hardware/arduino/esp8266/cores/esp8266/stdlib_noniso.h
+++ b/hardware/arduino/esp8266/cores/esp8266/stdlib_noniso.h
@@ -5,6 +5,9 @@
 extern "C"{
 #endif
 
+long atol_internal(const char*);
+
+float atof_internal(const char*);
 
 char* itoa (int val, char *s, int radix);
 
diff --git a/hardware/arduino/esp8266/cores/esp8266/user_config.h b/hardware/arduino/esp8266/cores/esp8266/user_config.h
old mode 100755
new mode 100644
diff --git a/hardware/tools/esp8266/sdk/include/ets_sys.h b/hardware/tools/esp8266/sdk/include/ets_sys.h
old mode 100755
new mode 100644
index 124681a46..a1328388a
--- a/hardware/tools/esp8266/sdk/include/ets_sys.h
+++ b/hardware/tools/esp8266/sdk/include/ets_sys.h
@@ -83,6 +83,7 @@ typedef struct _ETSTIMER_ {
 
 void ets_isr_attach(int routine, void* something, void *buff);
 void *pvPortMalloc(size_t xWantedSize);
+void *pvPortRealloc(void* ptr, size_t xWantedSize);
 void pvPortFree(void *ptr);
 void *vPortMalloc(size_t xWantedSize);
 void vPortFree(void *ptr);
diff --git a/hardware/tools/esp8266/sdk/include/mem.h b/hardware/tools/esp8266/sdk/include/mem.h
old mode 100755
new mode 100644
index b3fb8f480..ac92e74d0
--- a/hardware/tools/esp8266/sdk/include/mem.h
+++ b/hardware/tools/esp8266/sdk/include/mem.h
@@ -8,5 +8,6 @@
 #define os_malloc   pvPortMalloc
 #define os_free     vPortFree
 #define os_zalloc   pvPortZalloc
+#define os_realloc  pvPortRealloc
 
 #endif