# Raising privilege causes a hard fault

**URL:** <https://forums.freertos.org/t/raising-privilege-causes-a-hard-fault/5533>\
**Category:** Kernel\
**Created:** [September 24, 2012, 7:53am UTC](https://forums.freertos.org/t/raising-privilege-causes-a-hard-fault/5533 "2012-09-24T07:53:59Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![system](https://d2v6vdsk2p900z.cloudfront.net/original/1X/7fc8fdb729c645aab5b20282bbe34e57cb407be6.jpeg) [@system](https://forums.freertos.org/u/system)\
**Post date:** [September 24, 2012, 7:53am UTC](https://forums.freertos.org/t/raising-privilege-causes-a-hard-fault/5533/1 "2012-09-24T07:53:59Z")

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**[tamirmichael](https://sourceforge.net/u/tamirmichael/)** wrote on [Monday, September 24, 2012](https://sourceforge.net/p/freertos/discussion/382005/thread/f7e6ad79/#96f2):

Hello,

First I would like to applogize for posting a question that is not completely associated with FreeRTOS.  
I am working with a LPC1788 + FreeRTOS MPU, and attempting to make lwIP fit it as well. However, I notice that raising privilege&nbsp;&nbsp; (when exiting a critical section - vPortExitCritical) causes a hard fault. The CPU is in thread mode/unprivileged/PSP (it is not that a SVC is launched in an SVC), BASEPRI = 0x28, PRIMASK = 0, priority of SVC is 31.  
Any ideas?

Thanks in advance.

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<div class="post-metadata">

**Author:** ![system](https://d2v6vdsk2p900z.cloudfront.net/original/1X/7fc8fdb729c645aab5b20282bbe34e57cb407be6.jpeg) [@system](https://forums.freertos.org/u/system)\
**Post date:** [September 24, 2012, 8:07am UTC](https://forums.freertos.org/t/raising-privilege-causes-a-hard-fault/5533/2 "2012-09-24T08:07:39Z")

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**[tamirmichael](https://sourceforge.net/u/tamirmichael/)** wrote on [Monday, September 24, 2012](https://sourceforge.net/p/freertos/discussion/382005/thread/f7e6ad79/#7ffd):

Please ignore/delete this thread. It was posted by mistake.

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**Author:** ![rtel](https://d3iykfbgfh8zhg.cloudfront.net/user_avatar/forums.freertos.org/rtel/32/31_2.png) [@rtel](https://forums.freertos.org/u/rtel)\
**Post date:** [September 24, 2012, 8:17am UTC](https://forums.freertos.org/t/raising-privilege-causes-a-hard-fault/5533/3 "2012-09-24T08:17:31Z")

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**[rtel](https://sourceforge.net/u/rtel/)** wrote on [Monday, September 24, 2012](https://sourceforge.net/p/freertos/discussion/382005/thread/f7e6ad79/#5637):

See [https://sourceforge.net/projects/freertos/forums/forum/382005/topic/5861032/index/page/1](https://sourceforge.net/projects/freertos/forums/forum/382005/topic/5861032/index/page/1)