mbedtls: ensure not to link against standard alloc/free

Ensure that Mbed TLS will use its internal functions for heap memory management (allocation & free) instead of relying on standard libc functions. This helps solving link issues in some builds. Signed-off-by: Valerio Setti <[email protected]>
zephyrproject-rtos · Nov 5, 2024 · 9dc4b33 · 9dc4b33
1 parent e320a43
commit 9dc4b33
Showing 1 changed file with 8 additions and 0 deletions.
diff --git a/modules/mbedtls/configs/config-tls-generic.h b/modules/mbedtls/configs/config-tls-generic.h
@@ -19,6 +19,14 @@
 #define MBEDTLS_PLATFORM_EXIT_ALT
 #define MBEDTLS_NO_PLATFORM_ENTROPY
 
+#if defined(CONFIG_MBEDTLS_ENABLE_HEAP)
+/* Ensure that we're not using standard [m|c]alloc/free functions.
+ * mbedtls_memory_buffer_alloc_init() will set a local buffer to be used as
+ * heap and Mbed TLS will use internal function over it.
+ */
+#define MBEDTLS_PLATFORM_NO_STD_FUNCTIONS
+#endif
+
 #if defined(CONFIG_MBEDTLS_ZEROIZE_ALT)
 #define MBEDTLS_PLATFORM_ZEROIZE_ALT
 #endif