Illegal Instruction on Raspberry Pi Zero W Rev 1.1

[aforsythe]

Hi, and thanks for reporting errors! You can help us locating the bug even more by providing detailed information in the sections below:

The issue

Running pegasus-fe alpha15 yields Illegal Instruction

System info

PRETTY_NAME="Raspbian GNU/Linux 10 (buster)"
NAME="Raspbian GNU/Linux"
VERSION_ID="10"
VERSION="10 (buster)"
VERSION_CODENAME=buster
ID=raspbian
ID_LIKE=debian
HOME_URL="http://www.raspbian.org/"
SUPPORT_URL="http://www.raspbian.org/RaspbianForums"
BUG_REPORT_URL="http://www.raspbian.org/RaspbianBugs"

processor	: 0
model name	: ARMv6-compatible processor rev 7 (v6l)
BogoMIPS	: 697.95
Features	: half thumb fastmult vfp edsp java tls 
CPU implementer	: 0x41
CPU architecture: 7
CPU variant	: 0x0
CPU part	: 0xb76
CPU revision	: 7

Hardware	: BCM2835
Revision	: 9000c1
Serial		: 000000007839d372
Model		: Raspberry Pi Zero W Rev 1.1

Pegasus version

Tried alpha 15 stable and latest g4be7c848_rpi1, both result in Illegal Instruction
Tried loading via retropie package manager ... Illegal Instruction
Tried alternate hardware versions ... Illegal Instruction or Segmentation Fault

Pegasus log

No log files available

[mmatyas]

Thanks for the report! I'll see if I can fix this next week.

[mmatyas]

Tried it on my Pi Zero and can confirm the issue. This sounds like a compilation issue, so I've tried to cross-compile a simple Hello World C program, but to my surprise, neither the GCC provided by the distro (tested with 9.3), nor ARM's own toolchains (tested with 8.3-2019.03 and 10.2-2020.11) could compile a working binary: every time the program crashed with illegal instruction or segmentation fault too.

Without a working compiler I can't build a working Pegasus either. I'll see if I can make a custom GCC.

[PixelGirl]

I ran into this exact same issue trying to run Pegasus on the Pi Zero. Hope it gets fixed soon.

[mmatyas]

Just for future reference, here are the methods I've tried so far:

• Tested the cross compilers available from Ubuntu 20.04 repos (GCC 8, 9, 10)
• Tested the official ARM compilers (GCC 10.2-2020.11)
• Compiled GCC from source

Unfortunately, while all of them could compile a basic "Hello World" program, none of the created executables work on the actual Pi Zero hardware.