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Change xPortRaisePrivilege and vPortResetPrivilege to macros

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This prevents non-kernel code from calling these functions.

Signed-off-by: Gaurav Aggarwal <aggarg@amazon.com>
This commit is contained in:
Gaurav Aggarwal 2021-10-06 18:56:51 -07:00 • committed by Gaurav-Aggarwal-AWS
parent 78da9cb261
commit 7a3848753b
6 changed files with 341 additions and 235 deletions
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32
include/mpu_wrappers.h
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@ -168,11 +168,41 @@
#else /* MPU_WRAPPERS_INCLUDED_FROM_API_FILE */
/* Ensure API functions go in the privileged execution section. */
/* Ensure API functions go in the privileged execution section. */
#define PRIVILEGED_FUNCTION __attribute__( ( section( "privileged_functions" ) ) )
#define PRIVILEGED_DATA __attribute__( ( section( "privileged_data" ) ) )
#define FREERTOS_SYSTEM_CALL __attribute__( ( section( "freertos_system_calls" ) ) )
/**
* @brief Calls the port specific code to raise the privilege.
*
* Sets xRunningPrivileged to pdFALSE if privilege was raised, else sets
* it to pdTRUE.
*/
#define xPortRaisePrivilege( xRunningPrivileged ) \
{ \
/* Check whether the processor is already privileged. */ \
xRunningPrivileged = portIS_PRIVILEGED(); \
\
/* If the processor is not already privileged, raise privilege. */ \
if( xRunningPrivileged == pdFALSE ) \
{ \
portRAISE_PRIVILEGE(); \
} \
}
/**
* @brief If xRunningPrivileged is not pdTRUE, calls the port specific
* code to reset the privilege, otherwise does nothing.
*/
#define vPortResetPrivilege( xRunningPrivileged ) \
{ \
if( xRunningPrivileged == pdFALSE ) \
{ \
portRESET_PRIVILEGE(); \
} \
}
#endif /* MPU_WRAPPERS_INCLUDED_FROM_API_FILE */
#else /* portUSING_MPU_WRAPPERS */