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Exception return

From: abhijeet inamdar
Subject: Exception return
Date: Thu, 16 Dec 2021 18:31:27 +0100


I was running my .elf file on my custom machine(CM3) and was hit with this error when debugging and had the required -d flags and single stepping.

IN: Hal_MemFault
0x7004e794:  4770       bx       lr

Trace 0: 0x7f4faa471100 [00000000/7004e794/0x312000c1]  Hal_MemFault
R00=7004938d R01=00000000 R02=7004938c R03=ffffffff
R04=7005e410 R05=10020000 R06=e000eda0 R07=00000000
R08=00000010 R09=1003f8e0 R10=e000ed94 R11=00000000
R12=ffffffff R13=1003dbe0 R14=fffffff9 R15=7004e794
XPSR=01000003 ---- T handler
Taking exception 8 [QEMU v7M exception exit]
Exception return: magic PC fffffff9 previous exception 3
M profile return from interrupt with misaligned PC is UNPREDICTABLE on v7M
...successful exception return
DRBAR[6]: 0xa0000000 misaligned to DRSR region size, mask = 0x3fffffff
Taking exception 3 [Prefetch Abort]
...taking pending nonsecure exception 3

I even check the CFSR its 0x1 by doing p/x *(uint32_t *) 0xE000ED28 which gives me 0x1

Any help appreciated.


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