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Fix free secure context for Cortex-M23 ports

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Update the branching condition to correctly free secure context when
there is one.

Signed-off-by: Gaurav Aggarwal <aggarg@amazon.com>
This commit is contained in:
Gaurav Aggarwal 2021-08-10 00:00:35 -07:00 committed by Gaurav-Aggarwal-AWS
parent 06ea7275b3
commit 99a5a5fe82
5 changed files with 12 additions and 5 deletions
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2
portable/ARMv8M/non_secure/portable/GCC/ARM_CM23/portasm.c
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@ -449,7 +449,7 @@ void vPortFreeSecureContext( uint32_t * pulTCB ) /* __attribute__ (( naked )) PR
" ldr r2, [r0] \n"/* The first item in the TCB is the top of the stack. */ " ldr r2, [r0] \n"/* The first item in the TCB is the top of the stack. */
" ldr r1, [r2] \n"/* The first item on the stack is the task's xSecureContext. */ " ldr r1, [r2] \n"/* The first item on the stack is the task's xSecureContext. */
" cmp r1, #0 \n"/* Raise svc if task's xSecureContext is not NULL. */ " cmp r1, #0 \n"/* Raise svc if task's xSecureContext is not NULL. */
" beq free_secure_context \n" " bne free_secure_context \n"/* Branch if r1 != 0. */
" bx lr \n"/* There is no secure context (xSecureContext is NULL). */ " bx lr \n"/* There is no secure context (xSecureContext is NULL). */
" free_secure_context: \n" " free_secure_context: \n"
" svc %0 \n"/* Secure context is freed in the supervisor call. */ " svc %0 \n"/* Secure context is freed in the supervisor call. */

2
portable/ARMv8M/non_secure/portable/IAR/ARM_CM23/portasm.s
View File

@ -381,7 +381,7 @@ vPortFreeSecureContext:
ldr r2, [r0] /* The first item in the TCB is the top of the stack. */ ldr r2, [r0] /* The first item in the TCB is the top of the stack. */
ldr r1, [r2] /* The first item on the stack is the task's xSecureContext. */ ldr r1, [r2] /* The first item on the stack is the task's xSecureContext. */
cmp r1, #0 /* Raise svc if task's xSecureContext is not NULL. */ cmp r1, #0 /* Raise svc if task's xSecureContext is not NULL. */
beq free_secure_context bne free_secure_context /* Branch if r1 != 0. */
bx lr /* There is no secure context (xSecureContext is NULL). */ bx lr /* There is no secure context (xSecureContext is NULL). */
free_secure_context: free_secure_context:
svc 1 /* Secure context is freed in the supervisor call. portSVC_FREE_SECURE_CONTEXT = 1. */ svc 1 /* Secure context is freed in the supervisor call. portSVC_FREE_SECURE_CONTEXT = 1. */

2
portable/GCC/ARM_CM23/non_secure/portasm.c
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@ -449,7 +449,7 @@ void vPortFreeSecureContext( uint32_t * pulTCB ) /* __attribute__ (( naked )) PR
" ldr r2, [r0] \n"/* The first item in the TCB is the top of the stack. */ " ldr r2, [r0] \n"/* The first item in the TCB is the top of the stack. */
" ldr r1, [r2] \n"/* The first item on the stack is the task's xSecureContext. */ " ldr r1, [r2] \n"/* The first item on the stack is the task's xSecureContext. */
" cmp r1, #0 \n"/* Raise svc if task's xSecureContext is not NULL. */ " cmp r1, #0 \n"/* Raise svc if task's xSecureContext is not NULL. */
" beq free_secure_context \n" " bne free_secure_context \n"/* Branch if r1 != 0. */
" bx lr \n"/* There is no secure context (xSecureContext is NULL). */ " bx lr \n"/* There is no secure context (xSecureContext is NULL). */
" free_secure_context: \n" " free_secure_context: \n"
" svc %0 \n"/* Secure context is freed in the supervisor call. */ " svc %0 \n"/* Secure context is freed in the supervisor call. */

2
portable/IAR/ARM_CM23/non_secure/portasm.s
View File

@ -381,7 +381,7 @@ vPortFreeSecureContext:
ldr r2, [r0] /* The first item in the TCB is the top of the stack. */ ldr r2, [r0] /* The first item in the TCB is the top of the stack. */
ldr r1, [r2] /* The first item on the stack is the task's xSecureContext. */ ldr r1, [r2] /* The first item on the stack is the task's xSecureContext. */
cmp r1, #0 /* Raise svc if task's xSecureContext is not NULL. */ cmp r1, #0 /* Raise svc if task's xSecureContext is not NULL. */
beq free_secure_context bne free_secure_context /* Branch if r1 != 0. */
bx lr /* There is no secure context (xSecureContext is NULL). */ bx lr /* There is no secure context (xSecureContext is NULL). */
free_secure_context: free_secure_context:
svc 1 /* Secure context is freed in the supervisor call. portSVC_FREE_SECURE_CONTEXT = 1. */ svc 1 /* Secure context is freed in the supervisor call. portSVC_FREE_SECURE_CONTEXT = 1. */

9
tasks.c
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@ -1219,7 +1219,6 @@ static void prvAddNewTaskToReadyList( TCB_t * pxNewTCB )
{ {
--uxCurrentNumberOfTasks; --uxCurrentNumberOfTasks;
traceTASK_DELETE( pxTCB ); traceTASK_DELETE( pxTCB );
prvDeleteTCB( pxTCB );
/* Reset the next expected unblock time in case it referred to /* Reset the next expected unblock time in case it referred to
* the task that has just been deleted. */ * the task that has just been deleted. */
@ -1228,6 +1227,14 @@ static void prvAddNewTaskToReadyList( TCB_t * pxNewTCB )
} }
taskEXIT_CRITICAL(); taskEXIT_CRITICAL();
/* If the task is not deleting itself, call prvDeleteTCB from outside of
* critical section. If a task deletes itself, prvDeleteTCB is called
* from prvCheckTasksWaitingTermination which is called from Idle task. */
if( pxTCB != pxCurrentTCB )
{
prvDeleteTCB( pxTCB );
}
/* Force a reschedule if it is the currently running task that has just /* Force a reschedule if it is the currently running task that has just
* been deleted. */ * been deleted. */
if( xSchedulerRunning != pdFALSE ) if( xSchedulerRunning != pdFALSE )