diff options
| author | Antonio Nino Diaz <antonio.ninodiaz@arm.com> | 2017-05-19 11:37:22 +0100 |
|---|---|---|
| committer | Antonio Nino Diaz <antonio.ninodiaz@arm.com> | 2017-05-24 10:47:05 +0100 |
| commit | ab1794f57659a77ad66defbc7ea5cb8afb920b2f (patch) | |
| tree | 76459c6bdabaa7a1627199be6f97650634e7f636 | |
| parent | da5241cb1591416d6aeba9f30ce395b58c97cb5d (diff) | |
mbedtls: Use `tf_snprintf` instead of `snprintf`
The Trusted Firmware uses a subset of the APIs provided by mbed TLS.
This subset internally uses `snprintf`, but the only format specifier
used is '%d', which is supported by `tf_snprintf`.
This patch makes mbed TLS use `tf_snprintf` instead of `snprintf`,
saving 3 KB in both debug and release builds when TBBR is enabled.
Change-Id: I7f992a21015930d7c0f4660e7a28ceefd60b9597
Signed-off-by: Antonio Nino Diaz <antonio.ninodiaz@arm.com>
| -rw-r--r-- | drivers/auth/mbedtls/mbedtls_common.c | 7 | ||||
| -rw-r--r-- | include/drivers/auth/mbedtls/mbedtls_config.h | 2 |
2 files changed, 8 insertions, 1 deletions
diff --git a/drivers/auth/mbedtls/mbedtls_common.c b/drivers/auth/mbedtls/mbedtls_common.c index aad49a71..871831e2 100644 --- a/drivers/auth/mbedtls/mbedtls_common.c +++ b/drivers/auth/mbedtls/mbedtls_common.c @@ -4,10 +4,11 @@ * SPDX-License-Identifier: BSD-3-Clause */ -#include <assert.h> +#include <debug.h> /* mbed TLS headers */ #include <mbedtls/memory_buffer_alloc.h> +#include <mbedtls/platform.h> /* * mbed TLS heap @@ -29,6 +30,10 @@ void mbedtls_init(void) if (!ready) { /* Initialize the mbed TLS heap */ mbedtls_memory_buffer_alloc_init(heap, MBEDTLS_HEAP_SIZE); + + /* Use reduced version of snprintf to save space. */ + mbedtls_platform_set_snprintf(tf_snprintf); + ready = 1; } } diff --git a/include/drivers/auth/mbedtls/mbedtls_config.h b/include/drivers/auth/mbedtls/mbedtls_config.h index 7d8d17c3..22e75742 100644 --- a/include/drivers/auth/mbedtls/mbedtls_config.h +++ b/include/drivers/auth/mbedtls/mbedtls_config.h @@ -19,6 +19,8 @@ #define MBEDTLS_PLATFORM_MEMORY #define MBEDTLS_PLATFORM_NO_STD_FUNCTIONS +/* Prevent mbed TLS from using snprintf so that it can use tf_snprintf. */ +#define MBEDTLS_PLATFORM_SNPRINTF_ALT #define MBEDTLS_PKCS1_V15 #define MBEDTLS_PKCS1_V21 |