Bug 451144

Summary: getting unhandled instruction: 0xEC51 0x0F1E ==22488== valgrind: Unrecognised instruction at address 0xcf667. ==22488== at 0xCF666: _armv7_neon_probe when running valgrind
Product: [Developer tools] valgrind Reporter: mark.huber153
Component: memcheckAssignee: Julian Seward <jseward>
Status: REPORTED ---    
Severity: normal    
Priority: NOR    
Version First Reported In: 3.18.1   
Target Milestone: ---   
Platform: Other   
OS: Other   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:

Description mark.huber153 2022-03-04 21:27:21 UTC 
SUMMARY
***
NOTE: If you are reporting a crash, please try to attach a backtrace with debug symbols.
See https://community.kde.org/Guidelines_and_HOWTOs/Debugging/How_to_create_useful_crash_reports
***


STEPS TO REPRODUCE
1. I crosscompiled a C program with this compiler https://developer.arm.com/-/media/Files/downloads/gnu-a/8.3-2019.03/binrel/gcc-arm-8.3-2019.03-x86_64-arm-linux-gnueabihf.tar.xz?revision=e09a1c45-0ed3-4a8e-b06b-db3978fd8d56&la=en&hash=93ED4444B8B3A812B893373B490B90BBB28FD2E3 on my Ubuntu machine 20.04. 
2. I then copied the program onto a Beaglebone black machine where I run the program. details on the BBB: 
$ lsb_release -a
No LSB modules are available.
Distributor ID:	Debian
Description:	Debian GNU/Linux 10 (buster)
Release:	10
Codename:	buster

$ uname -a
Linux my-hostname 4.19.94-ti-r42 #1buster SMP PREEMPT Tue Mar 31 19:38:29 UTC 2020 armv7l GNU/Linux

3. I run valgrind like so: valgrind ./myprog

OBSERVED RESULT

unhandled instruction: 0xEC51 0x0F1E ==22488== valgrind: Unrecognised instruction at address 0xcf667. ==22488==    at 0xCF666: _armv7_neon_probe


EXPECTED RESULT

full valgrind report 


SOFTWARE/OS VERSIONS
my host os (where I compile the project): 

$ uname -a
Linux ubuntu 5.13.0-30-generic #33~20.04.1-Ubuntu SMP Mon Feb 7 14:25:10 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux

$  lsb_release -a
No LSB modules are available.
Distributor ID:	Ubuntu
Description:	Ubuntu 20.04.3 LTS
Release:	20.04
Codename:	focal

The Beaglebone Black (where I run the valgrind and the program): 

$ lsb_release -a
No LSB modules are available.
Distributor ID:	Debian
Description:	Debian GNU/Linux 10 (buster)
Release:	10
Codename:	buster

$ uname -a
Linux my-hostname 4.19.94-ti-r42 #1buster SMP PREEMPT Tue Mar 31 19:38:29 UTC 2020 armv7l GNU/Linux

ADDITIONAL INFORMATION
I did the same steps with gdb as in this bug report https://bugzilla.redhat.com/show_bug.cgi?id=1495320#c2 and got to the exact same conclusions