(gdb) awatch *(int *) 0x10
Hardware access (read/write) watchpoint 1: *(int *) 0x10
(gdb) cont
Continuing.

Program received signal SIGTRAP, Trace/breakpoint trap.
0x40154b04 in memcpy (dst0=0x10, src0=<value optimized out>, 
    len0=<value optimized out>)
    at ../../../../../../../../../gcc-4.5.2/newlib/libc/string/memcpy.c:107
107     ../../../../../../../../../gcc-4.5.2/newlib/libc/string/memcpy.c: No such file or directory.
        in ../../../../../../../../../gcc-4.5.2/newlib/libc/string/memcpy.c
(gdb) bt f
#0  0x40154b04 in memcpy (dst0=0x10, src0=<value optimized out>, 
    len0=<value optimized out>)
    at ../../../../../../../../../gcc-4.5.2/newlib/libc/string/memcpy.c:107
        dst = <value optimized out>
        src = <value optimized out>
        aligned_dst = <value optimized out>
        aligned_src = <value optimized out>
#1  0x40103c00 in _CORE_message_queue_Copy_buffer (
    the_message_queue=0x408da6bc, buffer=<value optimized out>, size=1, 
    id=<value optimized out>, 
    api_message_queue_mp_support=<value optimized out>, 
    submit_type=<value optimized out>, wait=false, 
    timeout=<value optimized out>)
    at ../../cpukit/../../../milkymist/lib/include/rtems/score/coremsg.inl:101
No locals.
#2  _CORE_message_queue_Submit (the_message_queue=0x408da6bc, 
    buffer=<value optimized out>, size=1, id=<value optimized out>, 
    api_message_queue_mp_support=<value optimized out>, 
    submit_type=<value optimized out>, wait=false, 
    timeout=<value optimized out>)
    at ../../../../../../../../../milkymist/rtems-milkymist.git/c/src/../../cpukit/score/src/coremsgsubmit.c:120
        the_thread = <value optimized out>
#3  0x40101de4 in _CORE_message_queue_Send (id=570490885, buffer=0x408d6e4f, 
    size=1)
    at ../../cpukit/../../../milkymist/lib/include/rtems/score/coremsg.inl:46
No locals.
#4  rtems_message_queue_send (id=570490885, buffer=0x408d6e4f, size=1)
    at ../../../../../../../../../milkymist/rtems-milkymist.git/c/src/../../cpukit/rtems/src/msgqsend.c:76
        location = OBJECTS_LOCAL
        status = 16
#5  0x00000000 in ?? ()
No symbol table info available.