INVPC Hard fault exception error

Note: This was originally posted on 16th July 2009 at http://forums.arm.com Using and Arm Cortex M3, the application that is running sometimes will generate a hard fault and deciphering the CFSR register...
Forced Hardfault (INVPC) Exception Error

Using ARM coretx-M chip set Getting random INVPC hard fault exception error, while running iperf tool for measuring n/w throughput. Hard fault reg: 0x40000000 xPSR: 0x01000000 PRIMASK: 0x00000001...
INVPC Hard fault exception error

Note: This was originally posted on 16th July 2009 at http://forums.arm.com Using and Arm Cortex M3, the application that is running sometimes will generate a hard fault and deciphering the CFSR register...
Forced Hardfault (INVPC) Exception Error

Using ARM coretx-M chip set Getting random INVPC hard fault exception error, while running iperf tool for measuring n/w throughput. Hard fault reg: 0x40000000 xPSR: 0x01000000 PRIMASK: 0x00000001...
"BX LR" causing INVPC Usage Fault exception

I have implemented a context switching code. For going back to privileged user mode after setting the return value in SP + 0x18 address, I am using BX LR instruction. But code execution goes to HardFault...