gdb-m33

This repository groups a set of gdb script for m33

sau_mpu_dump

It's a python module for gdb. This adds some gdb commands to:

• dump sau
• dump mpu secure or non secure

Dependencies

• gdb

How to use

These commands support tab completion to complete parameters

• Source the sau_mpu_dump module in gdb interface:

(gdb) source ../gdb-m33/sau_mpu_dump.py

sau_dump

• Help:

(gdb) help sau_dump
Perform a sau dump on ARM Cortex M device

• Dump

(gdb) sau_dump
show 8 sau region(s)
sau0 addr: base:0x80100000 limit:0x808fffff enabled
sau1 addr: base:0x80a00000 limit:0x811fffff enabled
sau2 addr: base:0x800ffd00 limit:0x800ffd5f enabled  Region is Non-secure callable
sau3 addr: base:0x40000000 limit:0x4fffffff enabled
sau4 addr: base:0x81200000 limit:0x812fffff enabled
sau5 addr: base:0x00000000 limit:0x0000001f disabled
sau6 addr: base:0x00000000 limit:0x0000001f disabled
sau7 addr: base:0x00000000 limit:0x0000001f disabled

mpu_dump

• Help:

(gdb) help mpu_dump
Perform a Mpu dump on ARM Cortex M device.

       mpu_dump [secure|non-secure]

• Dump

(gdb) mpu_dump secure
mpu: secure
mpu ctrl: 0x00000007: enabled

16 mpu region(s)
----------------
mpu0 	addr: base:0x800ffd00 limit:0x800ffd3f enabled
		-Non-shareable
		-Read-only by any privilege level
		-Execution only permitted if read permitted
		-Execution only permitted if read permitted
		-Attribute index associates to MPU_MAIR0|1: 1
mpu1 	addr: base:0x800158c0 limit:0x800333bf enabled
		-Non-shareable
		-Read-only by any privilege level
		-Execution only permitted if read permitted
		-Execution only permitted if read permitted
		-Attribute index associates to MPU_MAIR0|1: 1
mpu2 	addr: base:0x80008ce0 limit:0x8000a71f enabled
		-Non-shareable
		-Read-only by any privilege level
		-Execution only permitted if read permitted
		-Execution only permitted if read permitted
		-Attribute index associates to MPU_MAIR0|1: 1
mpu3 	addr: base:0x80901000 limit:0x80902a7f enabled
		-Non-shareable
		-Read/write by any privilege level
		-Execution not permitted
		-Execution only permitted if read permitted
		-Attribute index associates to MPU_MAIR0|1: 2
mpu4 	addr: base:0x00000000 limit:0x0000001f disabled
		-Non-shareable
		-Read/write by privileged code only
		-Execution only permitted if read permitted
		-Execution only permitted if read permitted
		-Attribute index associates to MPU_MAIR0|1: 0
mpu5 	addr: base:0x00000000 limit:0x0000001f disabled
		-Non-shareable
		-Read/write by privileged code only
		-Execution only permitted if read permitted
		-Execution only permitted if read permitted
		-Attribute index associates to MPU_MAIR0|1: 0
mpu6 	addr: base:0x00000000 limit:0x0000001f disabled
		-Non-shareable
		-Read/write by privileged code only
		-Execution only permitted if read permitted
		-Execution only permitted if read permitted
		-Attribute index associates to MPU_MAIR0|1: 0
mpu7 	addr: base:0x00000000 limit:0x0000001f disabled
		-Non-shareable
		-Read/write by privileged code only
		-Execution only permitted if read permitted
		-Execution only permitted if read permitted
		-Attribute index associates to MPU_MAIR0|1: 0
mpu8 	addr: base:0x00000000 limit:0x0000001f disabled
		-Non-shareable
		-Read/write by privileged code only
		-Execution only permitted if read permitted
		-Execution only permitted if read permitted
		-Attribute index associates to MPU_MAIR0|1: 0
mpu9 	addr: base:0x00000000 limit:0x0000001f disabled
		-Non-shareable
		-Read/write by privileged code only
		-Execution only permitted if read permitted
		-Execution only permitted if read permitted
		-Attribute index associates to MPU_MAIR0|1: 0
mpu10 	addr: base:0x00000000 limit:0x0000001f disabled
		-Non-shareable
		-Read/write by privileged code only
		-Execution only permitted if read permitted
		-Execution only permitted if read permitted
		-Attribute index associates to MPU_MAIR0|1: 0
mpu11 	addr: base:0x00000000 limit:0x0000001f disabled
		-Non-shareable
		-Read/write by privileged code only
		-Execution only permitted if read permitted
		-Execution only permitted if read permitted
		-Attribute index associates to MPU_MAIR0|1: 0
mpu12 	addr: base:0x00000000 limit:0x0000001f disabled
		-Non-shareable
		-Read/write by privileged code only
		-Execution only permitted if read permitted
		-Execution only permitted if read permitted
		-Attribute index associates to MPU_MAIR0|1: 0
mpu13 	addr: base:0x00000000 limit:0x0000001f disabled
		-Non-shareable
		-Read/write by privileged code only
		-Execution only permitted if read permitted
		-Execution only permitted if read permitted
		-Attribute index associates to MPU_MAIR0|1: 0
mpu14 	addr: base:0x00000000 limit:0x0000001f disabled
		-Non-shareable
		-Read/write by privileged code only
		-Execution only permitted if read permitted
		-Execution only permitted if read permitted
		-Attribute index associates to MPU_MAIR0|1: 0
mpu15 	addr: base:0x00000000 limit:0x0000001f disabled
		-Non-shareable
		-Read/write by privileged code only
		-Execution only permitted if read permitted
		-Execution only permitted if read permitted
		-Attribute index associates to MPU_MAIR0|1: 0

memory attributes
-----------------
	index0 attributes:0x04
		-Device-nGnRE
	index1 attributes:0xaa
		-Normal memory, Outer write-through non-transient read
		-Normal memory, Inner write-through non-transient read
	index2 attributes:0xff
		-Normal memory, Outer write-back non-transient read write
		-Normal memory, Inner write-back non-transient read write
	index3 attributes:0x00
		-Device-nGnRnE
	index4 attributes:0x00
		-Device-nGnRnE
	index5 attributes:0x00
		-Device-nGnRnE
	index6 attributes:0x00
		-Device-nGnRnE
	index7 attributes:0x00
		-Device-nGnRnE

faultdetails

It's a python module for gdb. This adds some gdb commands to:

• Show fault registers
• Previous Stack Frame (msp or psp)
• Previous Function if it's possible

presented at the linaro connect: slide code

Dependencies

• gdb

How to use

• Source the faultdetails module in gdb interface:

(gdb) source ../gdb-m33/faultdetails.py

• Help:

(gdb) help faultdetails
Perform a stack rollback on an ARM Cortex M device, and shows the
    main fault status registers.

• Example:

(gdb) faultdetails
Fault Status Registers:
  SHCSR: 0x00000004
  CFSR:  0x00000001
  HFSR:  0x40000000
Previous Stack Frame: msp
  R0:   0x00000000
  R1:   0x00000000
  R2:   0x00000000
  R3:   0x00000000
  R12:  0xFFFFFFFF
  LR:   0xFFFFFFFF // (EXC_RETURN)
  PC:   0xE000ED00
  xPSR: 0xF8000000

Previous Function:

Authors

Ludovic Barre 1udovic.6arre@gmail.com

License

This project is licensed under the GPL V2 License - see the LICENSE.md file for details