Added LoadStore Exception handlers

[sachin0x18]

Handles LoadStoreErrorCause and LoadStoreAlignmentCause allowing to use
32-bit memory region (IRAM) as 8-bit or 16-bit memory region

[RichardBarry]

Thanks for this - are you from Espressif?

[sachin0x18]

Yes

[yuhui-zheng]

I will shortly close this PR and merge the exact change into our kernel upstream. The change will be included in the coming release.

Minor question for @sachin0x18 -- what was the "historical" reason that this port is under /ThirdPaty?

[yuhui-zheng]

The changes could be reviewed here -- https://sourceforge.net/p/freertos/code/2816/. We are still in the middle of the migration, should be able to merge PR normally afterwards.

[mahavirj]

@yuhui-zheng

I will shortly close this PR and merge the exact change into our kernel upstream. The change will be included in the coming release.

Thanks. We have dependency of this change on PR at aws/amazon-freertos#1713. Do we need to wait for next minor/major FreeRTOS kernel release or we can immediately update submodule pointer (for FreeRTOS kernel) there?

Minor question for @sachin0x18 -- what was the "historical" reason that this port is under /ThirdPaty?

No specific reason. From our (Espressif) side, when we had first submitted ESP32 port, we did not include in ThirdParty prefix. Probably we can change that now.

CC @sachin0x18

[yuhui-zheng]

@mahavirj

We have dependency of this change on PR at aws/amazon-freertos#1713. Do we need to wait for next minor/major FreeRTOS kernel release or we can immediately update submodule pointer (for FreeRTOS kernel) there?

Kernel team has prepared a release candidate (which has included this PR), and we will soon have a kernel release. After this release, everyone should be able to update their submodule pointer.

As for the ThirdParty directory, let me check with team and see what needs to be done to move Espressif port out of ThirdParty directory.