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Forbid inlining of some functions to reduce code-size on ARMC6

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Usually, compilers are clever enough to pick the best inlining
strategy, but in this instance, it appears that compiling on ARMC6,
the compilers inlines xxx_prf_yyy() and xxx_calc_finished_yyy()
even though it really shouldn't. Forbid inlining through the use
of __attribute__((noinline)).
This commit is contained in:
Hanno Becker 2019-08-16 14:28:43 +01:00
parent 8e7f23a326
commit 2793f740a9
2 changed files with 15 additions and 12 deletions
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2
include/mbedtls/ssl_internal.h
View file

@ -60,8 +60,10 @@
#if defined(__GNUC__) || defined(__arm__)
#define MBEDTLS_ALWAYS_INLINE __attribute__((always_inline))
#define MBEDTLS_NO_INLINE __attribute__((noinline))
#else
#define MBEDTLS_ALWAYS_INLINE
#define MBEDTLS_NO_INLINE
#endif
#if ( defined(__ARMCC_VERSION) || defined(_MSC_VER) ) && \

25
library/ssl_tls.c
View file

@ -589,7 +589,7 @@ int (*mbedtls_ssl_hw_record_finish)( mbedtls_ssl_context *ssl ) = NULL;
* Key material generation
*/
#if defined(MBEDTLS_SSL_PROTO_SSL3)
static int ssl3_prf( const unsigned char *secret, size_t slen,
MBEDTLS_NO_INLINE static int ssl3_prf( const unsigned char *secret, size_t slen,
const char *label,
const unsigned char *random, size_t rlen,
unsigned char *dstbuf, size_t dlen )
@ -650,7 +650,7 @@ exit:
#endif /* MBEDTLS_SSL_PROTO_SSL3 */
#if defined(MBEDTLS_SSL_PROTO_TLS1) || defined(MBEDTLS_SSL_PROTO_TLS1_1)
static int tls1_prf( const unsigned char *secret, size_t slen,
MBEDTLS_NO_INLINE static int tls1_prf( const unsigned char *secret, size_t slen,
const char *label,
const unsigned char *random, size_t rlen,
unsigned char *dstbuf, size_t dlen )
@ -812,7 +812,8 @@ static int tls_prf_generic( mbedtls_md_type_t md_type,
}
#if defined(MBEDTLS_SHA256_C)
static int tls_prf_sha256( const unsigned char *secret, size_t slen,
MBEDTLS_NO_INLINE static int tls_prf_sha256(
const unsigned char *secret, size_t slen,
const char *label,
const unsigned char *random, size_t rlen,
unsigned char *dstbuf, size_t dlen )
@ -823,7 +824,8 @@ static int tls_prf_sha256( const unsigned char *secret, size_t slen,
#endif /* MBEDTLS_SHA256_C */
#if defined(MBEDTLS_SHA512_C)
static int tls_prf_sha384( const unsigned char *secret, size_t slen,
MBEDTLS_NO_INLINE static int tls_prf_sha384(
const unsigned char *secret, size_t slen,
const char *label,
const unsigned char *random, size_t rlen,
unsigned char *dstbuf, size_t dlen )
@ -837,8 +839,7 @@ static int tls_prf_sha384( const unsigned char *secret, size_t slen,
/*
* Call the appropriate PRF function
*/
MBEDTLS_ALWAYS_INLINE
static inline int ssl_prf( int minor_ver,
MBEDTLS_ALWAYS_INLINE static inline int ssl_prf( int minor_ver,
mbedtls_md_type_t hash,
const unsigned char *secret, size_t slen,
const char *label,
@ -882,7 +883,7 @@ static inline int ssl_prf( int minor_ver,
}
#if defined(MBEDTLS_SSL_PROTO_SSL3)
static void ssl_calc_finished_ssl(
MBEDTLS_NO_INLINE static void ssl_calc_finished_ssl(
mbedtls_ssl_context *ssl, unsigned char *buf, int from )
{
const char *sender;
@ -967,7 +968,7 @@ static void ssl_calc_finished_ssl(
#endif /* MBEDTLS_SSL_PROTO_SSL3 */
#if defined(MBEDTLS_SSL_PROTO_TLS1) || defined(MBEDTLS_SSL_PROTO_TLS1_1)
static void ssl_calc_finished_tls(
MBEDTLS_NO_INLINE static void ssl_calc_finished_tls(
mbedtls_ssl_context *ssl, unsigned char *buf, int from )
{
int len = 12;
@ -1031,7 +1032,7 @@ static void ssl_calc_finished_tls(
#if defined(MBEDTLS_SSL_PROTO_TLS1_2)
#if defined(MBEDTLS_SHA256_C)
static void ssl_calc_finished_tls_sha256(
MBEDTLS_NO_INLINE static void ssl_calc_finished_tls_sha256(
mbedtls_ssl_context *ssl, unsigned char *buf, int from )
{
int len = 12;
@ -1084,7 +1085,7 @@ static void ssl_calc_finished_tls_sha256(
#endif /* MBEDTLS_SHA256_C */
#if defined(MBEDTLS_SHA512_C)
static void ssl_calc_finished_tls_sha384(
MBEDTLS_NO_INLINE static void ssl_calc_finished_tls_sha384(
mbedtls_ssl_context *ssl, unsigned char *buf, int from )
{
int len = 12;
@ -1137,8 +1138,8 @@ static void ssl_calc_finished_tls_sha384(
#endif /* MBEDTLS_SHA512_C */
#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */
MBEDTLS_ALWAYS_INLINE
static inline int ssl_calc_finished( int minor_ver,
MBEDTLS_ALWAYS_INLINE static inline int ssl_calc_finished(
int minor_ver,
mbedtls_md_type_t hash,
mbedtls_ssl_context *ssl,
unsigned char *buf,