# S-Domain Fault Handler

**URL:** <https://forum.amebaiot.com/t/s-domain-fault-handler/1402>\
**Category:** SDK\
**Tags:** rtl8720cx\
**Created:** [August 13, 2022, 8:04am UTC](https://forum.amebaiot.com/t/s-domain-fault-handler/1402 "2022-08-13T08:04:38Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![wanglemao](https://sea2.discourse-cdn.com/flex016/user_avatar/forum.amebaiot.com/wanglemao/32/1079_2.png) [@wanglemao](https://forum.amebaiot.com/u/wanglemao)\
**Post date:** [August 13, 2022, 8:04am UTC](https://forum.amebaiot.com/t/s-domain-fault-handler/1402/1 "2022-08-13T08:04:39Z")

</div>

芯片：RTL8720CF  
运行过程中出现Fault Handler错误，如下

```auto
S-Domain Fault Handler: msp=0x1003f998 psp=0x10019f90 lr=0xfffffff1 fault_id=1

Usage Fault: 
SCB Configurable Fault Status Reg = 0x00020000

Usage Fault Status: 
Invalid state UsageFault, the processor has attempted to execute an instruction that makes illegal use of the EPSR

S-domain exception from Handler mode, Standard Stack frame on S-MSP
Registers Saved to stack

Stacked: 
R0 = 0x100296dc
R1 = 0x00000000
R2 = 0x9b022507
R3 = 0x00000001
R4 = 0x10008b90
R5 = 0x00000000
R6 = 0x40001000
R7 = 0x1003fd2c
R8 = 0x00000001
R9 = 0xa5a5a5a5
R10 = 0xa5a5a5a5
R11 = 0xa5a5a5a5
R12 = 0xa5a5a5a5
LR = 0x0001ed27
PC = 0x10008c08
PSR = 0x80000013

Current: 
LR = 0xfffffff1
MSP = 0x1003f9b8
PSP = 0x10019f90
xPSR = 0x80000006
CFSR = 0x00020000
HFSR = 0x00000000
DFSR = 0x00000000
MMFAR = 0x00000000
BFAR = 0x00000000
AFSR = 0x00000000
PriMask = 0x00000000
SVC priority: 0x00
PendSVC priority: 0xe0
Systick priority: 0xe0

MSP Data:
1003F9B8: 100296DC 00000000 9B022507 00000001
1003F9C8: A5A5A5A5 0001ED27 10008C08 80000013
1003F9D8: E000ED04 FFFFFFFD 00000000 E000E014
1003F9E8: E000E010 100005F8 10008C94 9B01480B
1003F9F8: 9B0144C4 21000000 FE56C9AB 42FB48D7
1003FA08: 8BBBF33E 3EC2E531 06E9B9D7 9944D7AA
1003FA18: 771BFCE6 CA092470 767F8FA7 088451B3
1003FA28: 9ADEF79C 5041012F C2EC4EB6 9150C005
1003FA38: B1CDCF2E 62C10244 F4A9B343 28F7475E
1003FA48: BDE87F09 2203112E 3F789D3F 826B008B
1003FA58: 3795F8AC 0B49666E F25CF137 40CD9B91
1003FA68: 1F7DAE72 2E5760FF 49B812FB 0A5D9532
1003FA78: A455EB3B 1391A677 3DFE7D77 0E607222
1003FA88: 786C7599 1D7084E2 2E3D47BE 07390909
1003FA98: 052408E3 1C590A06 1FBED37B 301B3B9E
1003FAA8: 96DFE3F3 24A97EA5 C97F9B7D 82172C32

PSP Data:
10019F90: 00000000 10019EA0 100005F8 00000001
10019FA0: A5A5A5A5 9B0131F3 9B012A46 61000000
10019FB0: A5A5A5A5 9B0144CD A5A5A5A5 A5A5A5A5
10019FC0: 00000000 80000058 10019F6C 10019EA8
10019FD0: 18DD8D7B 10008ABC 10008ABC 10019FC8
10019FE0: 10008AB4 0000000B E15FAEF6 18B80CE9
10019FF0: 10019FC8 00000000 00000000 454C4449
1001A000: 3D3DDE00 B0030003 00000000 00000000
1001A010: 00000000 01641600 00000000 800002F8
1001A020: 1001A06C 1001A30C 1001A14C 1001A13C
1001A030: 00000000 1001A038 FFFFFFFF 1001A038
1001A040: 1001A038 00000001 1001A04C FFFFFFFF
1001A050: 1001AB3C 1001AB3C 00000000 0000002A
1001A060: 00000010 AD3BFFFF 00000000 00000004
1001A070: 000003E8 10022370 00000000 00000004
1001A080: 000007D0 1001FA90 00000000 00000004

 == NS Dump ==
CFSR_NS = 0x00000000
HFSR_NS = 0x00000000
DFSR_NS = 0x00000000
MMFAR_NS = 0x00000000
BFAR_NS = 0x00000000
AFSR_NS = 0x00000000
MSP_NS = 0x00000000
PSP_NS = 0x00000000
NS HardFault Status Reg = 0x00000000
SCB Configurable Fault Status Reg = 0x00000000

== Back Trace ==

msp=0x1003f9b8 psp=0x10019f90
Main stack back trace:

top=0x1003fa00 lim=0x1003ea00
10008c08 @ sp = 00000000

0001ed23 @ sp = 00000000

9b014807 @ sp = 1003f9f4

Backtrace information may not correct! Use this command to get C source level information:
arm-none-eabi-addr2line -e ELF_file -a -f 10008c08 0001ed23 9b014807 

```

我按照提示，执行了，最后一句代码，但是显示的内容，依然让我无法分析，请问发生这种类型错误，该如何定位代码位置，谢谢

```auto
arm-none-eabi-addr2line -e Debug/bin/application_is.axf -a -f 10008c08 0001ed23 9b014807
0x10008c08
__bss_start__
ip.c:?
0x0001ed23
??
??:0
0x9b014807
xPortStartScheduler
/home/fff/work/projects/rtl8720/project/realtek_amebaz2_v0_example/GCC-RELEASE/../../../component/os/freertos/freertos_v10.0.1/Source/portable/GCC/ARM_RTL8710C/port.c:407

```

---

<div class="post-metadata">

**Author:** ![xidameng](https://sea2.discourse-cdn.com/flex016/user_avatar/forum.amebaiot.com/xidameng/32/18_2.png) [@xidameng](https://forum.amebaiot.com/u/xidameng)\
**Post date:** [August 15, 2022, 3:45am UTC](https://forum.amebaiot.com/t/s-domain-fault-handler/1402/2 "2022-08-15T03:45:27Z")

</div>

Hi @wanglemao ，

请问运行的是什么程序？ SDK是什么版本？ RTL8720CF的开发板型号是什么呢？

---

<div class="post-metadata">

**Author:** ![wanglemao](https://sea2.discourse-cdn.com/flex016/user_avatar/forum.amebaiot.com/wanglemao/32/1079_2.png) [@wanglemao](https://forum.amebaiot.com/u/wanglemao)\
**Post date:** [August 16, 2022, 12:11am UTC](https://forum.amebaiot.com/t/s-domain-fault-handler/1402/3 "2022-08-16T00:11:47Z")

</div>

一个支持wifi和蓝牙通信的软件，SDK： [ambz2\_sdk](https://github.com/ambiot/ambz2_sdk)，博联的模组，我其实只是想知道如何根据提示，定位代码位置，因为代码量很大，不太容易发现问题点

---

<div class="post-metadata">

**Author:** ![Alphi\_Jiang](https://sea2.discourse-cdn.com/flex016/user_avatar/forum.amebaiot.com/alphi_jiang/32/379_2.png) [@Alphi\_Jiang](https://forum.amebaiot.com/u/Alphi_Jiang)\
**Post date:** [August 16, 2022, 1:41am UTC](https://forum.amebaiot.com/t/s-domain-fault-handler/1402/4 "2022-08-16T01:41:17Z")

</div>

主要可以看PC跟LR (呼叫這個函數之前上一個函數)  
之後可以用arm-none-eabi-objdump -S xxx.elf \> xxx.c  
去看程式碼結果若有原始碼就會帶入

另外也可以透過 gdb 去做中斷處理