Qemu U-boot Standalone Program Hello World Crash

pbasvat — Wed, 28 Apr 2021 12:56:12 GMT

Hi,

I am trying to execute hello_world.bin file from u-boot command prompt, but when i am trying to do so i a getting crash

Here is details

1) command to launch qemu q-boot application

$ sudo /home/pbaswat/TechnicalWS/RPI-3B+/QEMU/Qemu/install/bin/qemu-system-ppc -m 1024 -M mpc8544ds -cpu MPC8548 -no-reboot -nographic -net nic,model=e1000 -net tap,ifname=vnet0,script=no,downscript=no u-boot.bin

In: serial
Out: serial
Err: serial
Net: e1000: 52:54:00:12:34:56
e1000#0
Hit any key to stop autoboot: 0
=> setenv ipaddr 192.168.31.11
=> setenv serverip 192.168.31.10
=> tftp 0x40000 hello_world.bin
Using e1000#0 device
TFTP from server 192.168.31.10; our IP address is 192.168.31.11
Filename 'hello_world.bin'.
Load address: 0x40000
Loading: #
1000 Bytes/s
done
Bytes transferred = 989 (3dd hex)
=> go 40000 this is test
## Starting application at 0x00040000 ...
Bad trap at PC: 3ff70c68, SR: 1606ed10, vector=400
**bleep**: 3FF70C68 XER: 20000000 LR: 00040018 REGS: 3fa6cbb0 TRAP: 0400 DAR: 00000000
MSR: 1606ed10 EE: 1 PR: 1 FP: 1 ME: 0 IR/DR: 01

GPR00: 3FF738BC 3FA6CCA0 3FB6DEB8 000403B4 3FB6ED7C 3FB6ED7C 3FA6CA18 00000020
GPR08: FFFFFFFE 00040000 3FB6DEB8 00000000 3FF9FBAC 00000000 00000000 00000000
GPR16: 00000000 3FB6ECF0 00000000 00000000 3FB6ED98 00000000 00000000 00002078
GPR24: 00000000 00000005 3FFF057C 3FB6ED78 00040000 00000005 3FFAF2FC 3FB6ED7C
Call backtrace:
00000005 3FF738BC 3FF86300 3FF7C1EC 3FF7C3A8 3FF7C950 3FF85938
3FF7A27C 3FF7D318 3FF946A4 3FF7D664 3FF7103C
Exception in kernel pc 3ff70c68 signal 0
### ERROR ### Please RESET the board ###

How to resolve this issue

Re: Qemu U-boot Standalone Program Hello World Crash

yipingwang — Fri, 30 Apr 2021 06:20:20 GMT

It seems that it is abnormal that the PC register is 3ff70c68, you could define the following in include/configs/<platform>.h, then rebuild u-boot.

#define CONFIG_STANDALONE_LOAD_ADDR 0x40000

Re: Qemu U-boot Standalone Program Hello World Crash

pbasvat — Wed, 05 May 2021 08:15:38 GMT

after adding below entry to file (/u-boot-2014.04/include/configs/MPC8548CDS.h)

#define CONFIG_STANDALONE_LOAD_ADDR 0x40000

issue still exists????????

Re: Qemu U-boot Standalone Program Hello World Crash

yipingwang — Thu, 06 May 2021 05:14:10 GMT

In your qemu environment, the PC register is 0x3ff70c68, this is incorrect, it should be 0x40000.

It seems there is problem with "go" command in your qemu environment.

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