Inhibit compiler from optimising out const-time asm
@@ -72,9 +72,9 @@ static inline uint32_t mbedtls_get_unaligned_volatile_uint32(volatile const unsi
*/
uint32_t r;
#if defined(__arm__) || defined(__thumb__) || defined(__thumb2__)
- asm ("ldr %0, [%1]" : "=r" (r) : "r" (p) :);
+ asm volatile ("ldr %0, [%1]" : "=r" (r) : "r" (p) :);
#elif defined(__aarch64__)
- asm ("ldr %w0, [%1]" : "=r" (r) : "r" (p) :);
+ asm volatile ("ldr %w0, [%1]" : "=r" (r) : "r" (p) :);
#endif
return r;
}
