[Pacemaker] alignment issues on arm (debian armel arch)
Andrew Beekhof
andrew at beekhof.net
Tue Jan 18 08:24:58 UTC 2011
Long story short... the buffer is created by the Corosync IPC code.
See:
gboolean ais_dispatch(int sender, gpointer user_data)
{
int rc = CS_OK;
char *buffer = NULL;
gboolean good = TRUE;
gboolean (*dispatch)(AIS_Message*,char*,int) = user_data;
rc = coroipcc_dispatch_get (ais_ipc_handle, (void**)&buffer, 0);
// passing in a pointer to a NULL pointer, nothing allocated yet
...
}
Angus is the corosync IPC specialist, perhaps he has some insights as
to your alignment issues.
I know shared memory is involved somehow, perhaps that is complicating things.
I also note that AIS_Message should in theory already be aligned, at
least to my reading of it.
struct crm_ais_msg_s
{
coroipc_response_header_t header __attribute__((aligned(8)));
On Thu, Dec 16, 2010 at 10:44 PM, Greg Walton <pacemaker at gwalton.net> wrote:
> I've been slowly working at getting pacemaker(stable-1.0) with
> corosync(flatiron) to run on arm little endian arch.
>
> I'm having alignment issues that break everything, crm status never reports
> any nodes joining. I've simplified things down to starting corosync on a
> single node, and expecting it to contact crmd and join the cluster via
> ipc(which it's not doing).
>
>
> I have isolated one alignment case I've been trying to fix:
>
> The AIS_Message struct pointed to by 'msg" in in ais_dispatch() (from
> lib/common/ais.c) shows up with odd alignment sometimes which causes access
> to msg->is_compressed to throw a bus error.
>
> What I've been doing is switching the kernel to signal on unaligned access
> "echo 5 > /proc/cpu/alignment" which gets me a core file.. 99 times out of
> 100 crmd is the first to core out, within 2 or 3 seconds at most.
>
> I should add that I can switch on kernel alignment fixups via "echo 3 >
> /proc/cpu/alignment" and the single node will sign on with crmd... at least
> initially, i haven't actually tested beyond "crm status"
>
> With some debugging lines in ais.c, I can see that crmd does NOT core when
> the AIS_Message struct starts in an address that is a multiple of 4. I've
> fiddled with various __attrib__ align statements in the AIS_Message struct
> in include/crm/ais.h and regardless of what align attributes I apply to
> struct members or the struct, the entire struct shows up starting at
> different alignments, 4 first then some odd/non alignment and cores out.
>
> So I'm trying to track down where the memory for the AIS_Message
> struct/buffer is getting allocated at. I've backed into corosync with
> coroipcc_dispatch_get(), then socket_recv(), and finally to recvmsg(). I
> only see 1 char at a time being read from the socket, and returned back to
> ais_dispatch()... but I got getting fairly confused by all the dispatches
> and handles being passed around and I'm not sure how the dispatch scheme is
> supposed to work anyway.
>
> So, the big question I have is: In ais_dispatch(), the memory that "msg"
> points to get's allocated by what/where... and/or is it in corosync or
> pacemaker?
>
>
> Here's an example of what I'm seeing in gdb( that source line #455 is
> something I added for debugging, a few lines later the code normally uses
> msg->is_compressed and you'd get the bus error there instead..
>
> Core was generated by `/usr/lib/heartbeat/crmd'.
> Program terminated with signal 7, Bus error.
> #0 0x40105048 in ais_dispatch (sender=7, user_data=0xfebc) at ais.c:455
> 455 crm_debug("msg->is_compressed:%d", msg->is_compressed);
> (gdb) print msg
> $1 = (AIS_Message *) 0x40b6832b
> (gdb) print &msg->is_compressed
> $2 = (int *) 0x40b6834b
> (gdb) print *msg
> $3 = {header = {size = 778, id = 0, error = CS_OK}, id = 1, is_compressed =
> 0,
> host = {id = 0, pid = 0, local = 1, type = crm_msg_crmd, size = 0,
> uname = '\000' <repeats 255 times>}, sender = {id = 855754762,
> pid = 24720, local = 0, type = crm_msg_crmd, size = 5,
> uname = "serva", '\000' <repeats 250 times>}, size = 178,
> compressed_size = 0,
> data = 0x40b6857f "<create_request_adv origin=\"post_cache_update\"
> t=\"crmd\" version=\"3.0.1\" subt=\"request\"
> reference=\"noop-crmd-1292462365-0\" crm_task=\"noop\" crm_sys_to=\"crmd\"
> crm_sys_from=\"crmd\"/>"}
> (gdb) bt
> #0 0x40105048 in ais_dispatch (sender=7, user_data=0xfebc) at ais.c:455
> #1 0x401ced6c in G_fd_dispatch (source=0x5a4f0, callback=0, user_data=0x0)
> at GSource.c:303
> #2 0x405308b4 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
> #3 0x405346b4 in ?? () from /lib/libglib-2.0.so.0
> Cannot access memory at address 0x0
> #4 0x405346b4 in ?? () from /lib/libglib-2.0.so.0
> Cannot access memory at address 0x0
> Backtrace stopped: previous frame identical to this frame (corrupt stack?)
> (gdb)
>
>
> Note that msg=0x40b6832b is not 4 byte aligned by my math. In some cases msg
> does point to 4 byte aligned memory. I added another debug line to print out
> %p for msg each time ais_dispatch() is called.
>
> Here is part of a corosync.log with my debug prints for msg, you can see
> crmd cores and re-registers with lrmd after each bus error, then it's
> aligned good 1 time, then cores again after that, over and over.... 4 byte
> aligned 1 time then the next it's not.
>
> root at serva:/var/lib/heartbeat/cores/hacluster# grep msg /tmp/corosync.log
> Dec 15 20:19:13 corosync [TOTEM ] downcheck (1000 ms) fail to recv const (50
> msgs)
> Dec 15 20:19:15 serva cib: [24692]: debug: ais_dispatch: msg %p:0x40b26000
> Dec 15 20:19:15 serva cib: [24692]: debug: ais_dispatch: (char*)msg:+
> Dec 15 20:19:15 serva cib: [24692]: debug: ais_dispatch:
> msg->is_compressed:0
> Dec 15 20:19:15 serva cib: [24692]: debug: ais_dispatch: Test alignment of
> msg->is_compressed:0
> Dec 15 20:19:15 serva cib: [24692]: debug: ais_dispatch: Test alignment of
> msg->is_compressed:0
> Dec 15 20:19:15 serva cib: [24692]: debug: ais_dispatch: Test alignment of
> msg->is_compressed:0
> Dec 15 20:19:15 serva cib: [24692]: debug: ais_dispatch: Test alignment of
> ais_data_len(msg):211
> Dec 15 20:19:15 serva cib: [24692]: debug: ais_dispatch: Test alignment of
> msg->size():211
> Dec 15 20:19:15 serva cib: [24692]: debug: ais_dispatch: Test alignment of
> msg->compressed_size():0
> Dec 15 20:19:16 serva lrmd: [24693]: debug: on_msg_register:client crmd
> [24696] registered
> Dec 15 20:19:16 serva crmd: [24696]: debug: ais_dispatch: msg %p:0x40b68000
> Dec 15 20:19:16 serva crmd: [24696]: debug: ais_dispatch: (char*)msg:+
> Dec 15 20:19:16 serva crmd: [24696]: debug: ais_dispatch:
> msg->is_compressed:0
> Dec 15 20:19:16 serva crmd: [24696]: debug: ais_dispatch: Test alignment of
> msg->is_compressed:0
> Dec 15 20:19:16 serva crmd: [24696]: debug: ais_dispatch: Test alignment of
> msg->is_compressed:0
> Dec 15 20:19:16 serva crmd: [24696]: debug: ais_dispatch: Test alignment of
> msg->is_compressed:0
> Dec 15 20:19:16 serva crmd: [24696]: debug: ais_dispatch: Test alignment of
> ais_data_len(msg):211
> Dec 15 20:19:16 serva crmd: [24696]: debug: ais_dispatch: Test alignment of
> msg->size():211
> Dec 15 20:19:16 serva crmd: [24696]: debug: ais_dispatch: Test alignment of
> msg->compressed_size():0
> Dec 15 20:19:16 serva crmd: [24696]: debug: ais_dispatch: msg %p:0x40b6832b
> Dec 15 20:19:16 serva crmd: [24696]: debug: ais_dispatch: (char*)msg:
> Dec 15 20:19:17 serva lrmd: [24693]: debug: on_msg_register:client crmd
> [24702] registered
> Dec 15 20:19:17 serva crmd: [24702]: debug: ais_dispatch: msg %p:0x40b68000
> Dec 15 20:19:17 serva crmd: [24702]: debug: ais_dispatch: (char*)msg:+
> Dec 15 20:19:17 serva crmd: [24702]: debug: ais_dispatch:
> msg->is_compressed:0
> Dec 15 20:19:17 serva crmd: [24702]: debug: ais_dispatch: Test alignment of
> msg->is_compressed:0
> Dec 15 20:19:17 serva crmd: [24702]: debug: ais_dispatch: Test alignment of
> msg->is_compressed:0
> Dec 15 20:19:17 serva crmd: [24702]: debug: ais_dispatch: Test alignment of
> msg->is_compressed:0
> Dec 15 20:19:17 serva crmd: [24702]: debug: ais_dispatch: Test alignment of
> ais_data_len(msg):211
> Dec 15 20:19:17 serva crmd: [24702]: debug: ais_dispatch: Test alignment of
> msg->size():211
> Dec 15 20:19:17 serva crmd: [24702]: debug: ais_dispatch: Test alignment of
> msg->compressed_size():0
> Dec 15 20:19:17 serva crmd: [24702]: debug: ais_dispatch: msg %p:0x40b6832b
> Dec 15 20:19:17 serva crmd: [24702]: debug: ais_dispatch: (char*)msg:
> Dec 15 20:19:18 serva lrmd: [24693]: debug: on_msg_register:client crmd
> [24704] registered
> Dec 15 20:19:18 serva crmd: [24704]: debug: ais_dispatch: msg %p:0x40b68000
> Dec 15 20:19:18 serva crmd: [24704]: debug: ais_dispatch: (char*)msg:+
> Dec 15 20:19:18 serva crmd: [24704]: debug: ais_dispatch:
> msg->is_compressed:0
> Dec 15 20:19:18 serva crmd: [24704]: debug: ais_dispatch: Test alignment of
> msg->is_compressed:0
> Dec 15 20:19:18 serva crmd: [24704]: debug: ais_dispatch: Test alignment of
> msg->is_compressed:0
> Dec 15 20:19:18 serva crmd: [24704]: debug: ais_dispatch: Test alignment of
> msg->is_compressed:0
> Dec 15 20:19:18 serva crmd: [24704]: debug: ais_dispatch: Test alignment of
> ais_data_len(msg):211
> Dec 15 20:19:18 serva crmd: [24704]: debug: ais_dispatch: Test alignment of
> msg->size():211
> Dec 15 20:19:18 serva crmd: [24704]: debug: ais_dispatch: Test alignment of
> msg->compressed_size():0
> Dec 15 20:19:18 serva crmd: [24704]: debug: ais_dispatch: msg %p:0x40b6832b
> Dec 15 20:19:18 serva crmd: [24704]: debug: ais_dispatch: (char*)msg:
> Dec 15 20:19:19 serva lrmd: [24693]: debug: on_msg_register:client crmd
> [24706] registered
> Dec 15 20:19:19 serva crmd: [24706]: debug: ais_dispatch: msg %p:0x40b68000
> Dec 15 20:19:19 serva crmd: [24706]: debug: ais_dispatch: (char*)msg:+
> Dec 15 20:19:19 serva crmd: [24706]: debug: ais_dispatch:
> msg->is_compressed:0
> Dec 15 20:19:19 serva crmd: [24706]: debug: ais_dispatch: Test alignment of
> msg->is_compressed:0
> Dec 15 20:19:19 serva crmd: [24706]: debug: ais_dispatch: Test alignment of
> msg->is_compressed:0
> Dec 15 20:19:19 serva crmd: [24706]: debug: ais_dispatch: Test alignment of
> msg->is_compressed:0
> Dec 15 20:19:19 serva crmd: [24706]: debug: ais_dispatch: Test alignment of
> ais_data_len(msg):211
> Dec 15 20:19:19 serva crmd: [24706]: debug: ais_dispatch: Test alignment of
> msg->size():211
> Dec 15 20:19:19 serva crmd: [24706]: debug: ais_dispatch: Test alignment of
> msg->compressed_size():0
> Dec 15 20:19:19 serva crmd: [24706]: debug: ais_dispatch: msg %p:0x40b6832b
> Dec 15 20:19:19 serva crmd: [24706]: debug: ais_dispatch: (char*)msg:
> Dec 15 20:19:20 serva lrmd: [24693]: debug: on_msg_register:client crmd
> [24708] registered
> Dec 15 20:19:20 serva crmd: [24708]: debug: ais_dispatch: msg %p:0x40b68000
> Dec 15 20:19:20 serva crmd: [24708]: debug: ais_dispatch: (char*)msg:+
> Dec 15 20:19:20 serva crmd: [24708]: debug: ais_dispatch:
> msg->is_compressed:0
> Dec 15 20:19:20 serva crmd: [24708]: debug: ais_dispatch: Test alignment of
> msg->is_compressed:0
> Dec 15 20:19:20 serva crmd: [24708]: debug: ais_dispatch: Test alignment of
> msg->is_compressed:0
> Dec 15 20:19:20 serva crmd: [24708]: debug: ais_dispatch: Test alignment of
> msg->is_compressed:0
> Dec 15 20:19:20 serva crmd: [24708]: debug: ais_dispatch: Test alignment of
> ais_data_len(msg):211
> Dec 15 20:19:20 serva crmd: [24708]: debug: ais_dispatch: Test alignment of
> msg->size():211
> Dec 15 20:19:20 serva crmd: [24708]: debug: ais_dispatch: Test alignment of
> msg->compressed_size():0
> Dec 15 20:19:20 serva crmd: [24708]: debug: ais_dispatch: msg %p:0x40b6832b
> Dec 15 20:19:20 serva crmd: [24708]: debug: ais_dispatch: (char*)msg:
> Dec 15 20:19:21 serva lrmd: [24693]: debug: on_msg_register:client crmd
> [24710] registered
> Dec 15 20:19:21 serva crmd: [24710]: debug: ais_dispatch: msg %p:0x40b68000
> Dec 15 20:19:21 serva crmd: [24710]: debug: ais_dispatch: (char*)msg:+
> Dec 15 20:19:21 serva crmd: [24710]: debug: ais_dispatch:
> msg->is_compressed:0
> Dec 15 20:19:21 serva crmd: [24710]: debug: ais_dispatch: Test alignment of
> msg->is_compressed:0
> Dec 15 20:19:21 serva crmd: [24710]: debug: ais_dispatch: Test alignment of
> msg->is_compressed:0
> Dec 15 20:19:21 serva crmd: [24710]: debug: ais_dispatch: Test alignment of
> msg->is_compressed:0
> Dec 15 20:19:21 serva crmd: [24710]: debug: ais_dispatch: Test alignment of
> ais_data_len(msg):211
> Dec 15 20:19:21 serva crmd: [24710]: debug: ais_dispatch: Test alignment of
> msg->size():211
> Dec 15 20:19:21 serva crmd: [24710]: debug: ais_dispatch: Test alignment of
> msg->compressed_size():0
> Dec 15 20:19:21 serva crmd: [24710]: debug: ais_dispatch: msg %p:0x40b6832b
> Dec 15 20:19:21 serva crmd: [24710]: debug: ais_dispatch: (char*)msg:
> Dec 15 20:19:22 serva lrmd: [24693]: debug: on_msg_register:client crmd
> [24712] registered
> Dec 15 20:19:22 serva crmd: [24712]: debug: ais_dispatch: msg %p:0x40b68000
> Dec 15 20:19:22 serva crmd: [24712]: debug: ais_dispatch: (char*)msg:+
> Dec 15 20:19:22 serva crmd: [24712]: debug: ais_dispatch:
> msg->is_compressed:0
> Dec 15 20:19:22 serva crmd: [24712]: debug: ais_dispatch: Test alignment of
> msg->is_compressed:0
> Dec 15 20:19:22 serva crmd: [24712]: debug: ais_dispatch: Test alignment of
> msg->is_compressed:0
> Dec 15 20:19:22 serva crmd: [24712]: debug: ais_dispatch: Test alignment of
> msg->is_compressed:0
> Dec 15 20:19:22 serva crmd: [24712]: debug: ais_dispatch: Test alignment of
> ais_data_len(msg):211
> Dec 15 20:19:22 serva crmd: [24712]: debug: ais_dispatch: Test alignment of
> msg->size():211
> Dec 15 20:19:22 serva crmd: [24712]: debug: ais_dispatch: Test alignment of
> msg->compressed_size():0
> Dec 15 20:19:22 serva crmd: [24712]: debug: ais_dispatch: msg %p:0x40b6832b
> Dec 15 20:19:22 serva crmd: [24712]: debug: ais_dispatch: (char*)msg:
> Dec 15 20:19:23 serva lrmd: [24693]: debug: on_msg_register:client crmd
> [24715] registered
> Dec 15 20:19:23 serva crmd: [24715]: debug: ais_dispatch: msg %p:0x40b68000
> Dec 15 20:19:23 serva crmd: [24715]: debug: ais_dispatch: (char*)msg:+
> Dec 15 20:19:23 serva crmd: [24715]: debug: ais_dispatch:
> msg->is_compressed:0
> Dec 15 20:19:23 serva crmd: [24715]: debug: ais_dispatch: Test alignment of
> msg->is_compressed:0
> Dec 15 20:19:23 serva crmd: [24715]: debug: ais_dispatch: Test alignment of
> msg->is_compressed:0
> Dec 15 20:19:23 serva crmd: [24715]: debug: ais_dispatch: Test alignment of
> msg->is_compressed:0
> Dec 15 20:19:23 serva crmd: [24715]: debug: ais_dispatch: Test alignment of
> ais_data_len(msg):211
> Dec 15 20:19:23 serva crmd: [24715]: debug: ais_dispatch: Test alignment of
> msg->size():211
> Dec 15 20:19:23 serva crmd: [24715]: debug: ais_dispatch: Test alignment of
> msg->compressed_size():0
> Dec 15 20:19:23 serva crmd: [24715]: debug: ais_dispatch: msg %p:0x40b6832b
> Dec 15 20:19:23 serva crmd: [24715]: debug: ais_dispatch: (char*)msg:
> Dec 15 20:19:24 serva lrmd: [24693]: debug: on_msg_register:client crmd
> [24717] registered
> Dec 15 20:19:24 serva crmd: [24717]: debug: ais_dispatch: msg %p:0x40b68000
> Dec 15 20:19:24 serva crmd: [24717]: debug: ais_dispatch: (char*)msg:+
> Dec 15 20:19:24 serva crmd: [24717]: debug: ais_dispatch:
> msg->is_compressed:0
> Dec 15 20:19:24 serva crmd: [24717]: debug: ais_dispatch: Test alignment of
> msg->is_compressed:0
> Dec 15 20:19:24 serva crmd: [24717]: debug: ais_dispatch: Test alignment of
> msg->is_compressed:0
> Dec 15 20:19:24 serva crmd: [24717]: debug: ais_dispatch: Test alignment of
> msg->is_compressed:0
> Dec 15 20:19:24 serva crmd: [24717]: debug: ais_dispatch: Test alignment of
> ais_data_len(msg):211
> Dec 15 20:19:24 serva crmd: [24717]: debug: ais_dispatch: Test alignment of
> msg->size():211
> Dec 15 20:19:24 serva crmd: [24717]: debug: ais_dispatch: Test alignment of
> msg->compressed_size():0
> Dec 15 20:19:24 serva crmd: [24717]: debug: ais_dispatch: msg %p:0x40b6832b
> Dec 15 20:19:24 serva crmd: [24717]: debug: ais_dispatch: (char*)msg:
> Dec 15 20:19:25 serva lrmd: [24693]: debug: on_msg_register:client crmd
> [24720] registered
> Dec 15 20:19:25 serva crmd: [24720]: debug: ais_dispatch: msg %p:0x40b68000
> Dec 15 20:19:25 serva crmd: [24720]: debug: ais_dispatch: (char*)msg:+
> Dec 15 20:19:25 serva crmd: [24720]: debug: ais_dispatch:
> msg->is_compressed:0
> Dec 15 20:19:25 serva crmd: [24720]: debug: ais_dispatch: Test alignment of
> msg->is_compressed:0
> Dec 15 20:19:25 serva crmd: [24720]: debug: ais_dispatch: Test alignment of
> msg->is_compressed:0
> Dec 15 20:19:25 serva crmd: [24720]: debug: ais_dispatch: Test alignment of
> msg->is_compressed:0
> Dec 15 20:19:25 serva crmd: [24720]: debug: ais_dispatch: Test alignment of
> ais_data_len(msg):211
> Dec 15 20:19:25 serva crmd: [24720]: debug: ais_dispatch: Test alignment of
> msg->size():211
> Dec 15 20:19:25 serva crmd: [24720]: debug: ais_dispatch: Test alignment of
> msg->compressed_size():0
> Dec 15 20:19:25 serva crmd: [24720]: debug: ais_dispatch: msg %p:0x40b6832b
> Dec 15 20:19:25 serva crmd: [24720]: debug: ais_dispatch: (char*)msg:
> Dec 15 20:19:26 serva lrmd: [24693]: debug: on_msg_register:client crmd
> [24722] registered
> Dec 15 20:19:26 serva crmd: [24722]: debug: ais_dispatch: msg %p:0x40b68000
> Dec 15 20:19:26 serva crmd: [24722]: debug: ais_dispatch: (char*)msg:+
> root at serva:/var/lib/heartbeat/cores/hacluster#
>
>
> here's a short tail of dmesg (which is the "warn" that you can configure
> /proc/cpu/alignment for) that shows the various PIDs of crmd whenthey bus
> error.
> Notice the address 0c40b6834b is the same as my gdb ouptut above shows for
> print &msg->is_compressed.
>
> [728065.861236] Alignment trap: crmd (18435) PC=0x40105008 Instr=0xe5933020
> Address=0x40b6834b FSR 0x001
> [728066.902288] Alignment trap: crmd (18438) PC=0x40105008 Instr=0xe5933020
> Address=0x40b6834b FSR 0x001
> [728067.944698] Alignment trap: crmd (18440) PC=0x40105008 Instr=0xe5933020
> Address=0x40b6834b FSR 0x001
> [735468.169460] Alignment trap: crmd (24696) PC=0x40105048 Instr=0xe5933020
> Address=0x40b6834b FSR 0x001
> [735469.296659] Alignment trap: crmd (24702) PC=0x40105048 Instr=0xe5933020
> Address=0x40b6834b FSR 0x001
> [735470.337662] Alignment trap: crmd (24704) PC=0x40105048 Instr=0xe5933020
> Address=0x40b6834b FSR 0x001
> [735471.403065] Alignment trap: crmd (24706) PC=0x40105048 Instr=0xe5933020
> Address=0x40b6834b FSR 0x001
> [735472.395324] Alignment trap: crmd (24708) PC=0x40105048 Instr=0xe5933020
> Address=0x40b6834b FSR 0x001
> [735473.426591] Alignment trap: crmd (24710) PC=0x40105048 Instr=0xe5933020
> Address=0x40b6834b FSR 0x001
> [735474.462234] Alignment trap: crmd (24712) PC=0x40105048 Instr=0xe5933020
> Address=0x40b6834b FSR 0x001
> [735475.505742] Alignment trap: crmd (24715) PC=0x40105048 Instr=0xe5933020
> Address=0x40b6834b FSR 0x001
> [735476.542277] Alignment trap: crmd (24717) PC=0x40105048 Instr=0xe5933020
> Address=0x40b6834b FSR 0x001
> [735477.587241] Alignment trap: crmd (24720) PC=0x40105048 Instr=0xe5933020
> Address=0x40b6834b FSR 0x001
> root at serva:/var/lib/heartbeat/cores/hacluster#
>
>
> Sorry for the massive cut and paste in my first email to the list, I just
> wanted to throw in all the details I've got and hope that someone can
> enlighten me further and/or tell me what I missed.
>
> Thanks,
> Greg
>
> oh yeah this should cover details on the arch/build some on the arch/build:
>
> root at serva:/var/lib/heartbeat/cores/hacluster# uname -a
> Linux serva 2.6.32-5-kirkwood #1 Fri Nov 26 07:01:06 UTC 2010 armv5tel
> GNU/Linux
>
>
> root at serva:/var/lib/heartbeat/cores/hacluster# readelf -h
> /usr/lib/heartbeat/crmd
> ELF Header:
> Magic: 7f 45 4c 46 01 01 01 00 00 00 00 00 00 00 00 00
> Class: ELF32
> Data: 2's complement, little endian
> Version: 1 (current)
> OS/ABI: UNIX - System V
> ABI Version: 0
> Type: EXEC (Executable file)
> Machine: ARM
> Version: 0x1
> Entry point address: 0xc1b4
> Start of program headers: 52 (bytes into file)
> Start of section headers: 4217016 (bytes into file)
> Flags: 0x5000002, has entry point, Version5
> EABI
> Size of this header: 52 (bytes)
> Size of program headers: 32 (bytes)
> Number of program headers: 8
> Size of section headers: 40 (bytes)
> Number of section headers: 41
> Section header string table index: 38
> root at serva:/var/lib/heartbeat/cores/hacluster#
>
> _______________________________________________
> Pacemaker mailing list: Pacemaker at oss.clusterlabs.org
> http://oss.clusterlabs.org/mailman/listinfo/pacemaker
>
> Project Home: http://www.clusterlabs.org
> Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf
> Bugs:
> http://developerbugs.linux-foundation.org/enter_bug.cgi?product=Pacemaker
>
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