I am trying to force a cortex m3 into thread mode using a process stack pointer. However at the "BX LR" line, it goes to FaultISR.
Following the "Diagnosing Software Faults in Stellaris® Microcontrollers" document, I checked the Fault Status Registers and found it is an instruction access violation. While in the FaultISR, I checked the PC that was saved to the stack and it was 0x00000000. I checked the PC saved onto the process stack and it had a value which was verified to be an actual function. My thumb bit was set and at the "BX LR" command my process stack pointer pointed to the proces's r0.
PSP - 0x200103e0
LR - 0xFFFFFFFD
0x200103e0 F0000000(r0) 11111111(r1) 22222222(r2) 33333333(r3)
0x200103f0 12121212(r4) 13131313(lr) 000031FD(pc) 01000000 (xspr)