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Associate secure context with task handle

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The secure side context management code now checks that the secure
context being saved or restored belongs to the task being switched-out
or switched-in respectively.

Signed-off-by: Gaurav Aggarwal <aggarg@amazon.com>
This commit is contained in:
Gaurav Aggarwal 2021-08-04 14:57:45 -07:00 • committed by Gaurav-Aggarwal-AWS
parent ccaa0f4d6e
commit 61f7560243
53 changed files with 1796 additions and 1353 deletions
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17
portable/ARMv8M/non_secure/port.c
View file

@ -781,7 +781,8 @@ void vPortSVCHandler_C( uint32_t * pulCallerStackAddress ) /* PRIVILEGED_FUNCTIO
uint32_t ulPC;
#if ( configENABLE_TRUSTZONE == 1 )
uint32_t ulR0;
uint32_t ulR0, ulR1;
extern TaskHandle_t pxCurrentTCB;
#if ( configENABLE_MPU == 1 )
uint32_t ulControl, ulIsTaskPrivileged;
#endif /* configENABLE_MPU */
@ -812,25 +813,27 @@ void vPortSVCHandler_C( uint32_t * pulCallerStackAddress ) /* PRIVILEGED_FUNCTIO
ulIsTaskPrivileged = ( ( ulControl & portCONTROL_PRIVILEGED_MASK ) == 0 );
/* Allocate and load a context for the secure task. */
xSecureContext = SecureContext_AllocateContext( ulR0, ulIsTaskPrivileged );
xSecureContext = SecureContext_AllocateContext( ulR0, ulIsTaskPrivileged, pxCurrentTCB );
}
#else /* if ( configENABLE_MPU == 1 ) */
{
/* Allocate and load a context for the secure task. */
xSecureContext = SecureContext_AllocateContext( ulR0 );
xSecureContext = SecureContext_AllocateContext( ulR0, pxCurrentTCB );
}
#endif /* configENABLE_MPU */
configASSERT( xSecureContext != NULL );
SecureContext_LoadContext( xSecureContext );
configASSERT( xSecureContext != securecontextINVALID_CONTEXT_ID );
SecureContext_LoadContext( xSecureContext, pxCurrentTCB );
break;
case portSVC_FREE_SECURE_CONTEXT:
/* R0 contains the secure context handle to be freed. */
/* R0 contains TCB being freed and R1 contains the secure
* context handle to be freed. */
ulR0 = pulCallerStackAddress[ 0 ];
ulR1 = pulCallerStackAddress[ 1 ];
/* Free the secure context. */
SecureContext_FreeContext( ( SecureContextHandle_t ) ulR0 );
SecureContext_FreeContext( ( SecureContextHandle_t ) ulR1, ( void * ) ulR0 );
break;
#endif /* configENABLE_TRUSTZONE */