Bug 405923

/tmp/usr/local/valgrind # ./bin/valgrind -v /sbin/dot1x &
/tmp/usr/local/valgrind # ==23190== Memcheck, a memory error detector
==23190== Copyright (C) 2002-2017, and GNU GPL'd, by Julian Seward et al.
==23190== Using Valgrind-3.14.0-353a3587bb-20181007X and LibVEX; rerun with -h for copyright info
==23190== Command: /sbin/dot1x
==23190==
--23190-- Valgrind options:
--23190--    -v
--23190-- Contents of /proc/version:
--23190--   Linux version 4.4.169-g32247d6-dirty (ngcf@ngcf57) (gcc version 4.9.3 (Buildroot 2015.11.1) ) #1 SMP Mon Mar 25 01:13:59 CST 2019
--23190--
--23190-- Arch and hwcaps: ARM, LittleEndian, ARMv7
--23190-- Page sizes: currently 4096, max supported 4096
--23190-- Valgrind library directory: ./lib/valgrind/
--23190-- Reading syms from /sbin/dot1x
--23190-- Reading syms from /lib/ld-2.22.so
--23190-- Reading syms from /tmp/usr/local/valgrind/lib/valgrind/memcheck-arm-linux
--23190--    object doesn't have a dynamic symbol table
--23190-- Scheduler: using generic scheduler lock implementation.
--23190-- Reading suppressions file: ./lib/valgrind//default.supp
==23190== embedded gdbserver: reading from /tmp/vsd/0/vgdb-pipe-from-vgdb-to-23190-by-root-on-???
==23190== embedded gdbserver: writing to   /tmp/vsd/0/vgdb-pipe-to-vgdb-from-23190-by-root-on-???
==23190== embedded gdbserver: shared mem   /tmp/vsd/0/vgdb-pipe-shared-mem-vgdb-23190-by-root-on-???
==23190==
==23190== TO CONTROL THIS PROCESS USING vgdb (which you probably
==23190== don't want to do, unless you know exactly what you're doing,
==23190== or are doing some strange experiment):
==23190==   ./lib/valgrind//../../bin/vgdb --pid=23190 ...command...
==23190==
==23190== TO DEBUG THIS PROCESS USING GDB: start GDB like this
==23190==   /path/to/gdb /sbin/dot1x
==23190== and then give GDB the following command
==23190==   target remote | ./lib/valgrind//../../bin/vgdb --pid=23190
==23190== --pid is optional if only one valgrind process is running
==23190==
==23190==
==23190== Process terminating with default action of signal 4 (SIGILL): dumping core
==23190==  Illegal opcode at address 0x5809DBB8
==23190==    at 0x4000AC0: ??? (in /lib/ld-2.22.so)
==23190==
==23190== HEAP SUMMARY:
==23190==     in use at exit: 0 bytes in 0 blocks
==23190==   total heap usage: 0 allocs, 0 frees, 0 bytes allocated
==23190==
==23190== All heap blocks were freed -- no leaks are possible
==23190==
==23190== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 0 from 0)
==23190== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 0 from 0)

[1]+  Illegal instruction        ./bin/valgrind -v /sbin/dot1x
/tmp/usr/local/valgrind # ls
bin           include       lib           share         vgcore.23190
/tmp/usr/local/valgrind # gdb /sbin/dot1x vgcore.23190
GNU gdb (GDB) 8.1
Copyright (C) 2018 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
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Reading symbols from /sbin/dot1x...done.
BFD: warning: /tmp/usr/local/valgrind/vgcore.23190 is truncated: expected core file size >= 2195456, found: 2191360
[New LWP 23190]
Core was generated by `'.
Program terminated with signal SIGILL, Illegal instruction.
#0  0x04000ac0 in ?? ()
(gdb) x /8x 0x5809DBB8
0x5809dbb8:     Cannot access memory at address 0x5809dbb8
(gdb) x /8x 0x4000AC0
0x4000ac0:      0xe59fa094      0xe59f4094      0xe1a0000d      0xeb001061
0x4000ad0:      0xe28f6084      0xe08aa006      0xe79a4004      0xe1a06000
(gdb) quit