diff --git a/ChangeLog b/ChangeLog
index c18ac5b..8447365 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -147,6 +147,9 @@
      mbedtls_md_info_t structure. Propagate errors from these functions
      everywhere except some locations in the ssl_tls.c module.
    * Improve CTR_DRBG error handling by propagating underlying AES errors.
+   * Add MBEDTLS_ERR_XXX_HW_ACCEL_FAILED error codes for all cryptography
+     modules where the software implementation can be replaced by a hardware
+     implementation.
 
 = mbed TLS 2.6.0 branch released 2017-08-10
 
diff --git a/include/mbedtls/aes.h b/include/mbedtls/aes.h
index 71dcea9..541fa93 100644
--- a/include/mbedtls/aes.h
+++ b/include/mbedtls/aes.h
@@ -41,8 +41,9 @@
 #define MBEDTLS_ERR_AES_INVALID_KEY_LENGTH                -0x0020  /**< Invalid key length. */
 #define MBEDTLS_ERR_AES_INVALID_INPUT_LENGTH              -0x0022  /**< Invalid data input length. */
 
-/* Error codes in range 0x0023-0x0023 */
+/* Error codes in range 0x0023-0x0025 */
 #define MBEDTLS_ERR_AES_FEATURE_UNAVAILABLE               -0x0023  /**< Feature not available, e.g. unsupported AES key size. */
+#define MBEDTLS_ERR_AES_HW_ACCEL_FAILED                   -0x0025  /**< AES hardware accelerator failed. */
 
 #if ( defined(__ARMCC_VERSION) || defined(_MSC_VER) ) && \
     !defined(inline) && !defined(__cplusplus)
diff --git a/include/mbedtls/arc4.h b/include/mbedtls/arc4.h
index 26de33f..875c574 100644
--- a/include/mbedtls/arc4.h
+++ b/include/mbedtls/arc4.h
@@ -32,6 +32,8 @@
 
 #include <stddef.h>
 
+#define MBEDTLS_ERR_ARC4_HW_ACCEL_FAILED                  -0x0019  /**< ARC4 hardware accelerator failed. */
+
 #if !defined(MBEDTLS_ARC4_ALT)
 // Regular implementation
 //
diff --git a/include/mbedtls/blowfish.h b/include/mbedtls/blowfish.h
index 6593730..c0ef5a0 100644
--- a/include/mbedtls/blowfish.h
+++ b/include/mbedtls/blowfish.h
@@ -41,6 +41,7 @@
 #define MBEDTLS_BLOWFISH_BLOCKSIZE   8          /* Blowfish uses 64 bit blocks */
 
 #define MBEDTLS_ERR_BLOWFISH_INVALID_KEY_LENGTH                -0x0016  /**< Invalid key length. */
+#define MBEDTLS_ERR_BLOWFISH_HW_ACCEL_FAILED                   -0x0017  /**< Blowfish hardware accelerator failed. */
 #define MBEDTLS_ERR_BLOWFISH_INVALID_INPUT_LENGTH              -0x0018  /**< Invalid data input length. */
 
 #if !defined(MBEDTLS_BLOWFISH_ALT)
diff --git a/include/mbedtls/camellia.h b/include/mbedtls/camellia.h
index 107056f..cf07629 100644
--- a/include/mbedtls/camellia.h
+++ b/include/mbedtls/camellia.h
@@ -38,6 +38,7 @@
 
 #define MBEDTLS_ERR_CAMELLIA_INVALID_KEY_LENGTH           -0x0024  /**< Invalid key length. */
 #define MBEDTLS_ERR_CAMELLIA_INVALID_INPUT_LENGTH         -0x0026  /**< Invalid data input length. */
+#define MBEDTLS_ERR_CAMELLIA_HW_ACCEL_FAILED              -0x0027  /**< Camellia hardware accelerator failed. */
 
 #if !defined(MBEDTLS_CAMELLIA_ALT)
 // Regular implementation
diff --git a/include/mbedtls/ccm.h b/include/mbedtls/ccm.h
index acd94ad..1459eb8 100644
--- a/include/mbedtls/ccm.h
+++ b/include/mbedtls/ccm.h
@@ -28,6 +28,7 @@
 
 #define MBEDTLS_ERR_CCM_BAD_INPUT      -0x000D /**< Bad input parameters to function. */
 #define MBEDTLS_ERR_CCM_AUTH_FAILED    -0x000F /**< Authenticated decryption failed. */
+#define MBEDTLS_ERR_CCM_HW_ACCEL_FAILED                   -0x0011  /**< CCM hardware accelerator failed. */
 
 #if !defined(MBEDTLS_CCM_ALT)
 // Regular implementation
diff --git a/include/mbedtls/cipher.h b/include/mbedtls/cipher.h
index b92a8db..97b9226 100644
--- a/include/mbedtls/cipher.h
+++ b/include/mbedtls/cipher.h
@@ -58,7 +58,8 @@
 #define MBEDTLS_ERR_CIPHER_INVALID_PADDING                -0x6200  /**< Input data contains invalid padding and is rejected. */
 #define MBEDTLS_ERR_CIPHER_FULL_BLOCK_EXPECTED            -0x6280  /**< Decryption of block requires a full block. */
 #define MBEDTLS_ERR_CIPHER_AUTH_FAILED                    -0x6300  /**< Authentication failed (for AEAD modes). */
-#define MBEDTLS_ERR_CIPHER_INVALID_CONTEXT              -0x6380  /**< The context is invalid, eg because it was free()ed. */
+#define MBEDTLS_ERR_CIPHER_INVALID_CONTEXT                -0x6380  /**< The context is invalid, eg because it was free()ed. */
+#define MBEDTLS_ERR_CIPHER_HW_ACCEL_FAILED                -0x6400  /**< Cipher hardware accelerator failed. */
 
 #define MBEDTLS_CIPHER_VARIABLE_IV_LEN     0x01    /**< Cipher accepts IVs of variable length */
 #define MBEDTLS_CIPHER_VARIABLE_KEY_LEN    0x02    /**< Cipher accepts keys of variable length */
diff --git a/include/mbedtls/cmac.h b/include/mbedtls/cmac.h
index a7f7f45..1cac948 100644
--- a/include/mbedtls/cmac.h
+++ b/include/mbedtls/cmac.h
@@ -31,6 +31,8 @@
 extern "C" {
 #endif
 
+#define MBEDTLS_ERR_CMAC_HW_ACCEL_FAILED                  -0x007A  /**< CMAC hardware accelerator failed. */
+
 #define MBEDTLS_AES_BLOCK_SIZE          16
 #define MBEDTLS_DES3_BLOCK_SIZE         8
 
diff --git a/include/mbedtls/des.h b/include/mbedtls/des.h
index 7f8f27e..1752898 100644
--- a/include/mbedtls/des.h
+++ b/include/mbedtls/des.h
@@ -37,6 +37,7 @@
 #define MBEDTLS_DES_DECRYPT     0
 
 #define MBEDTLS_ERR_DES_INVALID_INPUT_LENGTH              -0x0032  /**< The data input has an invalid length. */
+#define MBEDTLS_ERR_DES_HW_ACCEL_FAILED                   -0x0033  /**< DES hardware accelerator failed. */
 
 #define MBEDTLS_DES_KEY_SIZE    8
 
diff --git a/include/mbedtls/dhm.h b/include/mbedtls/dhm.h
index d017b38..8a28ffa 100644
--- a/include/mbedtls/dhm.h
+++ b/include/mbedtls/dhm.h
@@ -44,6 +44,7 @@
 #define MBEDTLS_ERR_DHM_INVALID_FORMAT                    -0x3380  /**< The ASN.1 data is not formatted correctly. */
 #define MBEDTLS_ERR_DHM_ALLOC_FAILED                      -0x3400  /**< Allocation of memory failed. */
 #define MBEDTLS_ERR_DHM_FILE_IO_ERROR                     -0x3480  /**< Read/write of file failed. */
+#define MBEDTLS_ERR_DHM_HW_ACCEL_FAILED                   -0x3500  /**< DHM hardware accelerator failed. */
 
 /**
  * RFC 3526 defines a number of standardized Diffie-Hellman groups
diff --git a/include/mbedtls/ecp.h b/include/mbedtls/ecp.h
index 9771340..b00ba4d 100644
--- a/include/mbedtls/ecp.h
+++ b/include/mbedtls/ecp.h
@@ -37,6 +37,7 @@
 #define MBEDTLS_ERR_ECP_RANDOM_FAILED                     -0x4D00  /**< Generation of random value, such as (ephemeral) key, failed. */
 #define MBEDTLS_ERR_ECP_INVALID_KEY                       -0x4C80  /**< Invalid private or public key. */
 #define MBEDTLS_ERR_ECP_SIG_LEN_MISMATCH                  -0x4C00  /**< Signature is valid but shorter than the user-supplied length. */
+#define MBEDTLS_ERR_ECP_HW_ACCEL_FAILED                   -0x4B80  /**< ECP hardware accelerator failed. */
 
 #if !defined(MBEDTLS_ECP_ALT)
 /*
diff --git a/include/mbedtls/error.h b/include/mbedtls/error.h
index 2c41247..cc17789 100644
--- a/include/mbedtls/error.h
+++ b/include/mbedtls/error.h
@@ -50,23 +50,25 @@
  *
  * Module   Nr  Codes assigned
  * MPI       7  0x0002-0x0010
- * GCM       2  0x0012-0x0014
- * BLOWFISH  2  0x0016-0x0018
+ * GCM       3  0x0012-0x0014   0x0013-0x0013
+ * BLOWFISH  3  0x0016-0x0018   0x0017-0x0017
  * THREADING 3  0x001A-0x001E
- * AES       2  0x0020-0x0022   0x0023-0x0023
- * CAMELLIA  2  0x0024-0x0026
- * XTEA      1  0x0028-0x0028
+ * AES       4  0x0020-0x0022   0x0023-0x0025
+ * CAMELLIA  3  0x0024-0x0026   0x0027-0x0027
+ * XTEA      2  0x0028-0x0028   0x0029-0x0029
  * BASE64    2  0x002A-0x002C
  * OID       1  0x002E-0x002E   0x000B-0x000B
  * PADLOCK   1  0x0030-0x0030
- * DES       1  0x0032-0x0032
+ * DES       2  0x0032-0x0032   0x0033-0x0033
  * CTR_DBRG  4  0x0034-0x003A
  * ENTROPY   3  0x003C-0x0040   0x003D-0x003F
  * NET      11  0x0042-0x0052   0x0043-0x0045
  * ASN1      7  0x0060-0x006C
+ * CMAC      1  0x007A-0x007A
  * PBKDF2    1  0x007C-0x007C
  * HMAC_DRBG 4                  0x0003-0x0009
- * CCM       2                  0x000D-0x000F
+ * CCM       3                  0x000D-0x0011
+ * ARC4      1                  0x0019-0x0019
  * MD2       1                  0x002B-0x002B
  * MD4       1                  0x002D-0x002D
  * MD5       1                  0x002F-0x002F
@@ -81,12 +83,12 @@
  * PKCS#12   1   4 (Started from top)
  * X509      2   20
  * PKCS5     2   4 (Started from top)
- * DHM       3   9
- * PK        3   14 (Started from top)
- * RSA       4   10
- * ECP       4   8 (Started from top)
- * MD        5   4
- * CIPHER    6   6
+ * DHM       3   10
+ * PK        3   15 (Started from top)
+ * RSA       4   11
+ * ECP       4   9 (Started from top)
+ * MD        5   5
+ * CIPHER    6   8
  * SSL       6   17 (Started from top)
  * SSL       7   31
  *
diff --git a/include/mbedtls/gcm.h b/include/mbedtls/gcm.h
index f101986..c7f01c3 100644
--- a/include/mbedtls/gcm.h
+++ b/include/mbedtls/gcm.h
@@ -32,6 +32,7 @@
 #define MBEDTLS_GCM_DECRYPT     0
 
 #define MBEDTLS_ERR_GCM_AUTH_FAILED                       -0x0012  /**< Authenticated decryption failed. */
+#define MBEDTLS_ERR_GCM_HW_ACCEL_FAILED                   -0x0013  /**< GCM hardware accelerator failed. */
 #define MBEDTLS_ERR_GCM_BAD_INPUT                         -0x0014  /**< Bad input parameters to function. */
 
 #if !defined(MBEDTLS_GCM_ALT)
diff --git a/include/mbedtls/md.h b/include/mbedtls/md.h
index f23bad4..57c27a6 100644
--- a/include/mbedtls/md.h
+++ b/include/mbedtls/md.h
@@ -38,6 +38,7 @@
 #define MBEDTLS_ERR_MD_BAD_INPUT_DATA                     -0x5100  /**< Bad input parameters to function. */
 #define MBEDTLS_ERR_MD_ALLOC_FAILED                       -0x5180  /**< Failed to allocate memory. */
 #define MBEDTLS_ERR_MD_FILE_IO_ERROR                      -0x5200  /**< Opening or reading of file failed. */
+#define MBEDTLS_ERR_MD_HW_ACCEL_FAILED                    -0x5280  /**< MD hardware accelerator failed. */
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/include/mbedtls/pk.h b/include/mbedtls/pk.h
index 28f6150..1059bda 100644
--- a/include/mbedtls/pk.h
+++ b/include/mbedtls/pk.h
@@ -64,6 +64,7 @@
 #define MBEDTLS_ERR_PK_UNKNOWN_NAMED_CURVE -0x3A00  /**< Elliptic curve is unsupported (only NIST curves are supported). */
 #define MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE -0x3980  /**< Unavailable feature, e.g. RSA disabled for RSA key. */
 #define MBEDTLS_ERR_PK_SIG_LEN_MISMATCH    -0x3900  /**< The signature is valid but its length is less than expected. */
+#define MBEDTLS_ERR_PK_HW_ACCEL_FAILED     -0x3880  /**< PK hardware accelerator failed. */
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/include/mbedtls/rsa.h b/include/mbedtls/rsa.h
index a4a4716..7521058 100644
--- a/include/mbedtls/rsa.h
+++ b/include/mbedtls/rsa.h
@@ -50,6 +50,7 @@
 #define MBEDTLS_ERR_RSA_OUTPUT_TOO_LARGE                  -0x4400  /**< The output buffer for decryption is not large enough. */
 #define MBEDTLS_ERR_RSA_RNG_FAILED                        -0x4480  /**< The random generator failed to generate non-zeros. */
 #define MBEDTLS_ERR_RSA_UNSUPPORTED_OPERATION             -0x4500  /**< The implementation doesn't offer the requested operation, e.g. because of security violations or lack of functionality */
+#define MBEDTLS_ERR_RSA_HW_ACCEL_FAILED                   -0x4580  /**< RSA hardware accelerator failed. */
 
 /*
  * RSA constants
diff --git a/include/mbedtls/xtea.h b/include/mbedtls/xtea.h
index 1d01e56..34ccee3 100644
--- a/include/mbedtls/xtea.h
+++ b/include/mbedtls/xtea.h
@@ -37,6 +37,7 @@
 #define MBEDTLS_XTEA_DECRYPT     0
 
 #define MBEDTLS_ERR_XTEA_INVALID_INPUT_LENGTH             -0x0028  /**< The data input has an invalid length. */
+#define MBEDTLS_ERR_XTEA_HW_ACCEL_FAILED                  -0x0029  /**< XTEA hardware accelerator failed. */
 
 #if !defined(MBEDTLS_XTEA_ALT)
 // Regular implementation
diff --git a/library/error.c b/library/error.c
index 9079c5c..4f5e446 100644
--- a/library/error.c
+++ b/library/error.c
@@ -45,6 +45,10 @@
 #include "mbedtls/aes.h"
 #endif
 
+#if defined(MBEDTLS_ARC4_C)
+#include "mbedtls/arc4.h"
+#endif
+
 #if defined(MBEDTLS_BASE64_C)
 #include "mbedtls/base64.h"
 #endif
@@ -69,6 +73,10 @@
 #include "mbedtls/cipher.h"
 #endif
 
+#if defined(MBEDTLS_CMAC_C)
+#include "mbedtls/cmac.h"
+#endif
+
 #if defined(MBEDTLS_CTR_DRBG_C)
 #include "mbedtls/ctr_drbg.h"
 #endif
@@ -213,6 +221,8 @@
             mbedtls_snprintf( buf, buflen, "CIPHER - Authentication failed (for AEAD modes)" );
         if( use_ret == -(MBEDTLS_ERR_CIPHER_INVALID_CONTEXT) )
             mbedtls_snprintf( buf, buflen, "CIPHER - The context is invalid, eg because it was free()ed" );
+        if( use_ret == -(MBEDTLS_ERR_CIPHER_HW_ACCEL_FAILED) )
+            mbedtls_snprintf( buf, buflen, "CIPHER - Cipher hardware accelerator failed" );
 #endif /* MBEDTLS_CIPHER_C */
 
 #if defined(MBEDTLS_DHM_C)
@@ -234,6 +244,8 @@
             mbedtls_snprintf( buf, buflen, "DHM - Allocation of memory failed" );
         if( use_ret == -(MBEDTLS_ERR_DHM_FILE_IO_ERROR) )
             mbedtls_snprintf( buf, buflen, "DHM - Read/write of file failed" );
+        if( use_ret == -(MBEDTLS_ERR_DHM_HW_ACCEL_FAILED) )
+            mbedtls_snprintf( buf, buflen, "DHM - DHM hardware accelerator failed" );
 #endif /* MBEDTLS_DHM_C */
 
 #if defined(MBEDTLS_ECP_C)
@@ -253,6 +265,8 @@
             mbedtls_snprintf( buf, buflen, "ECP - Invalid private or public key" );
         if( use_ret == -(MBEDTLS_ERR_ECP_SIG_LEN_MISMATCH) )
             mbedtls_snprintf( buf, buflen, "ECP - Signature is valid but shorter than the user-supplied length" );
+        if( use_ret == -(MBEDTLS_ERR_ECP_HW_ACCEL_FAILED) )
+            mbedtls_snprintf( buf, buflen, "ECP - ECP hardware accelerator failed" );
 #endif /* MBEDTLS_ECP_C */
 
 #if defined(MBEDTLS_MD_C)
@@ -264,6 +278,8 @@
             mbedtls_snprintf( buf, buflen, "MD - Failed to allocate memory" );
         if( use_ret == -(MBEDTLS_ERR_MD_FILE_IO_ERROR) )
             mbedtls_snprintf( buf, buflen, "MD - Opening or reading of file failed" );
+        if( use_ret == -(MBEDTLS_ERR_MD_HW_ACCEL_FAILED) )
+            mbedtls_snprintf( buf, buflen, "MD - MD hardware accelerator failed" );
 #endif /* MBEDTLS_MD_C */
 
 #if defined(MBEDTLS_PEM_PARSE_C) || defined(MBEDTLS_PEM_WRITE_C)
@@ -316,6 +332,8 @@
             mbedtls_snprintf( buf, buflen, "PK - Unavailable feature, e.g. RSA disabled for RSA key" );
         if( use_ret == -(MBEDTLS_ERR_PK_SIG_LEN_MISMATCH) )
             mbedtls_snprintf( buf, buflen, "PK - The signature is valid but its length is less than expected" );
+        if( use_ret == -(MBEDTLS_ERR_PK_HW_ACCEL_FAILED) )
+            mbedtls_snprintf( buf, buflen, "PK - PK hardware accelerator failed" );
 #endif /* MBEDTLS_PK_C */
 
 #if defined(MBEDTLS_PKCS12_C)
@@ -361,6 +379,8 @@
             mbedtls_snprintf( buf, buflen, "RSA - The random generator failed to generate non-zeros" );
         if( use_ret == -(MBEDTLS_ERR_RSA_UNSUPPORTED_OPERATION) )
             mbedtls_snprintf( buf, buflen, "RSA - The implementation doesn't offer the requested operation, e.g. because of security violations or lack of functionality" );
+        if( use_ret == -(MBEDTLS_ERR_RSA_HW_ACCEL_FAILED) )
+            mbedtls_snprintf( buf, buflen, "RSA - RSA hardware accelerator failed" );
 #endif /* MBEDTLS_RSA_C */
 
 #if defined(MBEDTLS_SSL_TLS_C)
@@ -550,8 +570,15 @@
         mbedtls_snprintf( buf, buflen, "AES - Invalid data input length" );
     if( use_ret == -(MBEDTLS_ERR_AES_FEATURE_UNAVAILABLE) )
         mbedtls_snprintf( buf, buflen, "AES - Feature not available, e.g. unsupported AES key size" );
+    if( use_ret == -(MBEDTLS_ERR_AES_HW_ACCEL_FAILED) )
+        mbedtls_snprintf( buf, buflen, "AES - AES hardware accelerator failed" );
 #endif /* MBEDTLS_AES_C */
 
+#if defined(MBEDTLS_ARC4_C)
+    if( use_ret == -(MBEDTLS_ERR_ARC4_HW_ACCEL_FAILED) )
+        mbedtls_snprintf( buf, buflen, "ARC4 - ARC4 hardware accelerator failed" );
+#endif /* MBEDTLS_ARC4_C */
+
 #if defined(MBEDTLS_ASN1_PARSE_C)
     if( use_ret == -(MBEDTLS_ERR_ASN1_OUT_OF_DATA) )
         mbedtls_snprintf( buf, buflen, "ASN1 - Out of data when parsing an ASN1 data structure" );
@@ -598,6 +625,8 @@
 #if defined(MBEDTLS_BLOWFISH_C)
     if( use_ret == -(MBEDTLS_ERR_BLOWFISH_INVALID_KEY_LENGTH) )
         mbedtls_snprintf( buf, buflen, "BLOWFISH - Invalid key length" );
+    if( use_ret == -(MBEDTLS_ERR_BLOWFISH_HW_ACCEL_FAILED) )
+        mbedtls_snprintf( buf, buflen, "BLOWFISH - Blowfish hardware accelerator failed" );
     if( use_ret == -(MBEDTLS_ERR_BLOWFISH_INVALID_INPUT_LENGTH) )
         mbedtls_snprintf( buf, buflen, "BLOWFISH - Invalid data input length" );
 #endif /* MBEDTLS_BLOWFISH_C */
@@ -607,6 +636,8 @@
         mbedtls_snprintf( buf, buflen, "CAMELLIA - Invalid key length" );
     if( use_ret == -(MBEDTLS_ERR_CAMELLIA_INVALID_INPUT_LENGTH) )
         mbedtls_snprintf( buf, buflen, "CAMELLIA - Invalid data input length" );
+    if( use_ret == -(MBEDTLS_ERR_CAMELLIA_HW_ACCEL_FAILED) )
+        mbedtls_snprintf( buf, buflen, "CAMELLIA - Camellia hardware accelerator failed" );
 #endif /* MBEDTLS_CAMELLIA_C */
 
 #if defined(MBEDTLS_CCM_C)
@@ -614,8 +645,15 @@
         mbedtls_snprintf( buf, buflen, "CCM - Bad input parameters to function" );
     if( use_ret == -(MBEDTLS_ERR_CCM_AUTH_FAILED) )
         mbedtls_snprintf( buf, buflen, "CCM - Authenticated decryption failed" );
+    if( use_ret == -(MBEDTLS_ERR_CCM_HW_ACCEL_FAILED) )
+        mbedtls_snprintf( buf, buflen, "CCM - CCM hardware accelerator failed" );
 #endif /* MBEDTLS_CCM_C */
 
+#if defined(MBEDTLS_CMAC_C)
+    if( use_ret == -(MBEDTLS_ERR_CMAC_HW_ACCEL_FAILED) )
+        mbedtls_snprintf( buf, buflen, "CMAC - CMAC hardware accelerator failed" );
+#endif /* MBEDTLS_CMAC_C */
+
 #if defined(MBEDTLS_CTR_DRBG_C)
     if( use_ret == -(MBEDTLS_ERR_CTR_DRBG_ENTROPY_SOURCE_FAILED) )
         mbedtls_snprintf( buf, buflen, "CTR_DRBG - The entropy source failed" );
@@ -630,6 +668,8 @@
 #if defined(MBEDTLS_DES_C)
     if( use_ret == -(MBEDTLS_ERR_DES_INVALID_INPUT_LENGTH) )
         mbedtls_snprintf( buf, buflen, "DES - The data input has an invalid length" );
+    if( use_ret == -(MBEDTLS_ERR_DES_HW_ACCEL_FAILED) )
+        mbedtls_snprintf( buf, buflen, "DES - DES hardware accelerator failed" );
 #endif /* MBEDTLS_DES_C */
 
 #if defined(MBEDTLS_ENTROPY_C)
@@ -648,6 +688,8 @@
 #if defined(MBEDTLS_GCM_C)
     if( use_ret == -(MBEDTLS_ERR_GCM_AUTH_FAILED) )
         mbedtls_snprintf( buf, buflen, "GCM - Authenticated decryption failed" );
+    if( use_ret == -(MBEDTLS_ERR_GCM_HW_ACCEL_FAILED) )
+        mbedtls_snprintf( buf, buflen, "GCM - GCM hardware accelerator failed" );
     if( use_ret == -(MBEDTLS_ERR_GCM_BAD_INPUT) )
         mbedtls_snprintf( buf, buflen, "GCM - Bad input parameters to function" );
 #endif /* MBEDTLS_GCM_C */
@@ -747,6 +789,8 @@
 #if defined(MBEDTLS_XTEA_C)
     if( use_ret == -(MBEDTLS_ERR_XTEA_INVALID_INPUT_LENGTH) )
         mbedtls_snprintf( buf, buflen, "XTEA - The data input has an invalid length" );
+    if( use_ret == -(MBEDTLS_ERR_XTEA_HW_ACCEL_FAILED) )
+        mbedtls_snprintf( buf, buflen, "XTEA - XTEA hardware accelerator failed" );
 #endif /* MBEDTLS_XTEA_C */
     // END generated code
 
diff --git a/programs/ssl/ssl_server2.c b/programs/ssl/ssl_server2.c
index 1285abc..cc29b49 100644
--- a/programs/ssl/ssl_server2.c
+++ b/programs/ssl/ssl_server2.c
@@ -2019,8 +2019,10 @@
 #if !defined(_WIN32)
     if( received_sigterm )
     {
-        mbedtls_printf( " interrupted by SIGTERM\n" );
-        ret = 0;
+        mbedtls_printf( " interrupted by SIGTERM (not in net_accept())\n" );
+        if( ret == MBEDTLS_ERR_NET_INVALID_CONTEXT )
+            ret = 0;
+
         goto exit;
     }
 #endif
@@ -2056,8 +2058,10 @@
 #if !defined(_WIN32)
         if( received_sigterm )
         {
-            mbedtls_printf( " interrupted by signal\n" );
-            ret = 0;
+            mbedtls_printf( " interrupted by SIGTERM (in net_accept())\n" );
+            if( ret == MBEDTLS_ERR_NET_ACCEPT_FAILED )
+                ret = 0;
+
             goto exit;
         }
 #endif
diff --git a/scripts/generate_errors.pl b/scripts/generate_errors.pl
index cfcf07c..59618d4 100755
--- a/scripts/generate_errors.pl
+++ b/scripts/generate_errors.pl
@@ -29,13 +29,14 @@
 
 my $error_format_file = $data_dir.'/error.fmt';
 
-my @low_level_modules = ( "AES", "ASN1", "BLOWFISH", "CAMELLIA", "BIGNUM",
-                          "BASE64", "XTEA", "PBKDF2", "OID",
-                          "PADLOCK", "DES", "NET", "CTR_DRBG", "ENTROPY",
-                          "HMAC_DRBG", "MD2", "MD4", "MD5", "RIPEMD160",
-                          "SHA1", "SHA256", "SHA512", "GCM", "THREADING", "CCM" );
-my @high_level_modules = ( "PEM", "X509", "DHM", "RSA", "ECP", "MD", "CIPHER", "SSL",
-                           "PK", "PKCS12", "PKCS5" );
+my @low_level_modules = qw( AES ARC4 ASN1 BASE64 BIGNUM BLOWFISH
+                            CAMELLIA CCM CMAC CTR_DRBG DES
+                            ENTROPY GCM HMAC_DRBG MD2 MD4 MD5
+                            NET OID PADLOCK PBKDF2 RIPEMD160
+                            SHA1 SHA256 SHA512 THREADING XTEA );
+my @high_level_modules = qw( CIPHER DHM ECP MD
+                             PEM PK PKCS12 PKCS5
+                             RSA SSL X509 );
 
 my $line_separator = $/;
 undef $/;
diff --git a/tests/compat.sh b/tests/compat.sh
index 958d618..672bdab 100755
--- a/tests/compat.sh
+++ b/tests/compat.sh
@@ -887,8 +887,9 @@
         done
     }
 else
+    echo "Warning: lsof not available, wait_server_start = sleep"
     wait_server_start() {
-        sleep 1
+        sleep 2
     }
 fi
 
diff --git a/tests/ssl-opt.sh b/tests/ssl-opt.sh
index fa785a4..f13c38f 100755
--- a/tests/ssl-opt.sh
+++ b/tests/ssl-opt.sh
@@ -308,6 +308,7 @@
         done
     }
 else
+    echo "Warning: lsof not available, wait_server_start = sleep $START_DELAY"
     wait_server_start() {
         sleep "$START_DELAY"
     }
@@ -656,14 +657,28 @@
 # used by watchdog
 MAIN_PID="$$"
 
-# be more patient with valgrind
+# We use somewhat arbitrary delays for tests:
+# - how long do we wait for the server to start (when lsof not available)?
+# - how long do we allow for the client to finish?
+#   (not to check performance, just to avoid waiting indefinitely)
+# Things are slower with valgrind, so give extra time here.
+#
+# Note: without lsof, there is a trade-off between the running time of this
+# script and the risk of spurious errors because we didn't wait long enough.
+# The watchdog delay on the other hand doesn't affect normal running time of
+# the script, only the case where a client or server gets stuck.
 if [ "$MEMCHECK" -gt 0 ]; then
-    START_DELAY=3
-    DOG_DELAY=30
+    START_DELAY=6
+    DOG_DELAY=60
 else
-    START_DELAY=1
-    DOG_DELAY=10
+    START_DELAY=2
+    DOG_DELAY=20
 fi
+
+# some particular tests need more time:
+# - for the client, we multiply the usual watchdog limit by a factor
+# - for the server, we sleep for a number of seconds after the client exits
+# see client_need_more_time() and server_needs_more_time()
 CLI_DELAY_FACTOR=1
 SRV_DELAY_SECONDS=0