Re: toolchain/53643: gdb on core files fails on arm

[christos%zoulas.com@localhost (Christos Zoulas)]

On Sep 29, 10:45pm, martin%NetBSD.org@localhost (martin%NetBSD.org@localhost) wrote:
-- Subject: toolchain/53643: gdb on core files fails on arm

| >Number:         53643
| >Category:       toolchain
| >Synopsis:       gdb on core files fails on arm
| >Confidential:   no
| >Severity:       serious
| >Priority:       medium
| >Responsible:    toolchain-manager
| >State:          open
| >Class:          sw-bug
| >Submitter-Id:   net
| >Arrival-Date:   Sat Sep 29 22:45:00 +0000 2018
| >Originator:     Martin Husemann
| >Release:        NetBSD 8.99.25
| >Organization:
| The NetBSD Foundation, Inc.
| >Environment:
| System: NetBSD space-truckin.duskware.de 8.99.25 NetBSD 8.99.25 (SUNXI) #78: Sat Sep 29 20:54:01 CEST 2018 martin%night-owl.duskware.de@localhost:/usr/src/sys/arch/evbarm/compile/SUNXI evbarm
| Architecture: earmv7hfeb
| Machine: evbarm
| >Description:
| 
| The new openssl does not work well on arm. I get various core files, but
| looking at them seems to be unreliable:
| 
| Core was generated by `ssh-add'.
| Program terminated with signal SIGILL, Illegal instruction.
| #0  0x6f559468 in _armv7_tick () from /usr/lib/libcrypto.so.14
| (gdb) bt
| #0  0x6f559468 in _armv7_tick () from /usr/lib/libcrypto.so.14
| Register 25 is not available
| 
| Note that even the pc register is likely wrong - the instruction it points
| at is not illegal on this cpu, and tracing through the call in live
| instances does not throw a SIGILL.
| 
| >How-To-Repeat:
| Just use gdb on a core file on arm. Maybe special for big endian arm?

This is on BE arm only? I can't reproduce any of it on LE arm (RPi 2)

christos