[oe] systemd on armv4t

[Martin Jansa]

On Wed, Nov 07, 2012 at 09:18:04PM +0000, Phil Blundell wrote:
> On Wed, 2012-11-07 at 21:53 +0100, Martin Jansa wrote:
> > Core was generated by `/sbin/init splash'.
> > Program terminated with signal 4, Illegal instruction.
> > #0  0x40110a00 in raise () from /lib/libpthread.so.0
> > (gdb)
> > (gdb) bt
> > #0  0x40110a00 in raise () from /lib/libpthread.so.0
> > #1  0x000118de in ?? ()
> > #2  0x000118de in ?? ()
> 
> That backtrace (and the disassembly) doesn't tell you much about the
> real location of the fault since it just shows systemd re-throwing a
> signal that it caught.  If you compile with -fasynchronous-unwind-tables
> then you might get a better backtrace; otherwise, you can hack main.c to
> stop it catching SIGILL in the first place.  Or turn on user fault
> debugging in the kernel.

Thanks, now I have better backtrace:
Core was generated by `/sbin/init splash'.
Program terminated with signal 4, Illegal instruction.
#0  0x400d3a00 in raise (sig=sig at entry=4) at ../nptl/sysdeps/unix/sysv/linux/pt-raise.c:45
45                                  sig);
(gdb) bt
#0  0x400d3a00 in raise (sig=sig at entry=4) at ../nptl/sysdeps/unix/sysv/linux/pt-raise.c:45
#1  0x0001183e in crash (sig=4) at src/core/main.c:135
#2  <signal handler called>
#3  0x40062d44 in __sync_add_and_fetch_4 (ptr=0xbc710, val=1)
    at /OE/shr-core/tmp-eglibc/work-shared/gcc-4.7.2-r13/gcc-4.7.2/libgcc/config/arm/linux-atomic.c:128
#4  0x4005e8bc in _dbus_atomic_inc (atomic=atomic at entry=0xbc710) at dbus-sysdeps-unix.c:2440
#5  0x40056560 in _dbus_server_init_base (server=server at entry=0xbc710, vtable=<optimized out>, address=address at entry=0xbe81a7e0) at dbus-server.c:118
#6  0x40056fbc in _dbus_server_new_for_socket (fds=fds at entry=0xbe81a7dc, n_fds=n_fds at entry=1, address=address at entry=0xbe81a7e0,
    noncefile=noncefile at entry=0x0) at dbus-server-socket.c:320
#7  0x40057404 in _dbus_server_new_for_domain_socket (path=path at entry=0xbc678 "/run/systemd/private", abstract=abstract at entry=0,
    error=error at entry=0xbe81a890) at dbus-server-unix.c:276
#8  0x400575ea in _dbus_server_listen_platform_specific (entry=<optimized out>, server_p=0xbe81a874, error=0xbe81a890) at dbus-server-unix.c:134
#9  0x400568a0 in dbus_server_listen (address=0x6d9d4 "unix:path=/run/systemd/private", error=0xbe81a8e8) at dbus-server.c:585
#10 0x00033ec2 in bus_init_private (m=0xbc340) at src/core/dbus.c:1076
#11 bus_init (m=m at entry=0xbc340, try_bus_connect=try_bus_connect at entry=false) at src/core/dbus.c:1147
#12 0x00014eb2 in manager_new (running_as=running_as at entry=SYSTEMD_SYSTEM, _m=_m at entry=0xbe81aa54) at src/core/manager.c:305
#13 0x0000fbb8 in main (argc=2, argv=0xbe81af04) at src/core/main.c:1612
(gdb) disass 0x40062d44
Dump of assembler code for function __sync_add_and_fetch_4:
   0x40062d2c <+0>:     push    {r4, r5, r6, lr}
   0x40062d2e <+2>:     adds    r5, r0, #0
   0x40062d30 <+4>:     adds    r6, r1, #0
   0x40062d32 <+6>:     ldr     r0, [r5, #0]
   0x40062d34 <+8>:     adds    r2, r5, #0
   0x40062d36 <+10>:    adds    r4, r0, r6
   0x40062d38 <+12>:    adds    r1, r4, #0
   0x40062d3a <+14>:    ldr     r3, [pc, #16]   ; (0x40062d4c <__sync_add_and_fetch_4+32>)
   0x40062d3c <+16>:    bl      0x40063404
   0x40062d40 <+20>:    cmp     r0, #0
   0x40062d42 <+22>:    bne.n   0x40062d32 <__sync_add_and_fetch_4+6>
   0x40062d44 <+24>:    adds    r0, r4, #0
   0x40062d46 <+26>:    pop     {r4, r5, r6}
   0x40062d48 <+28>:    pop     {r1}
   0x40062d4a <+30>:    bx      r1
   0x40062d4c <+32>:    lsrs    r0, r0, #31
   0x40062d4e <+34>:    vsli.32 <illegal reg q13.5>, q8, #31
End of assembler dump.

Cheers,

-- 
Martin 'JaMa' Jansa     jabber: Martin.Jansa at gmail.com
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