We're hoping to do some algorithm profiling on our ARM Cortex-A8 based SOC,
have had no problem building and running Valgrind 3.6.1 for our platform, but
in all cases when running the tool even on very simple console mode "Hello
World" applications, we're immediately getting a SIGILL crash on what appears
to be the _start function in ucLibc before hitting any of our code. We're
building ucLibc using the generic ARM option (there isn't a Cortex-A8 buildroot
option), but I was under the general impression that it's valgrind that
requires Cortex-A8, which is how we've built it, that a library such as ucLibc
or other application built using a generic ARM instruction set should be able
to be executed.
Here's the sort of thing we're running into, would appreciate any suggestions
for what might be going on, we're completely stuck at this point...
# valgrind -v ./diftDec dift_422cmode2_no_hdr.data output.dat -hdr -f 422
==483== Memcheck, a memory error detector
==483== Copyright (C) 2002-2010, and GNU GPL'd, by Julian Seward et al.
==483== Using Valgrind-3.6.1 and LibVEX; rerun with -h for copyright info
==483== Command: ./diftDec dift_422cmode2_no_hdr.data output.dat -hdr -f 422
==483==
--483-- Valgrind options:
--483-- --suppressions=/usr/lib/valgrind/uclibc.supp
--483-- -v
--483-- Contents of /proc/version:
--483-- Linux version 2.6.32 (Sri@Sri-Northstar) (gcc version 4.4.3
(Buildroot 2010.02) ) #5 PREEMPT Thu Aug 25 18:19:36 PDT 2011
--483-- Arch and hwcaps: ARM, ARMv7
--483-- Page sizes: currently 4096, max supported 4096
--483-- Valgrind library directory: /usr/lib/valgrind
--483-- Reading syms from /dift/diftDec (0x8000)
--483-- Reading syms from /lib/ld-uClibc-0.9.30.2.so (0x4000000)
--483-- object doesn't have a symbol table
--483-- Reading syms from /usr/lib/valgrind/memcheck-arm-linux (0x38000000)
--483-- object doesn't have a symbol table
--483-- object doesn't have a dynamic symbol table
--483-- Reading suppressions file: /usr/lib/valgrind/uclibc.supp
--483-- Reading suppressions file: /usr/lib/valgrind/default.supp
==483==
==483== Process terminating with default action of signal 4 (SIGILL)
==483== Illegal opcode at address 0x380AC1A8
==483== at 0x4000960: _start (in /lib/ld-uClibc-0.9.30.2.so)
==483==
==483== HEAP SUMMARY:
==483== in use at exit: 0 bytes in 0 blocks
==483== total heap usage: 0 allocs, 0 frees, 0 bytes allocated
==483==
==483== All heap blocks were freed -- no leaks are possible
==483==
==483== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 0 from 0)
==483== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 0 from 0)
Illegal instruction
#
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