Comment 44 for bug 532733

Soren pointed out that is more useful than plain backtrace:

From the qemu-kvm -O0:

(gdb) thread apply all bt full

Thread 1 (Thread 0x7ffff7fc7760 (LWP 31739)):
#0 0xffffffffcde9719c in ?? ()
No symbol table info available.
#1 0x00007fffffffe090 in ?? ()
No symbol table info available.
#2 0x00000000005986a4 in tb_find_slow (pc=Cannot access memory at address 0xffffffffffffffbe
) at /home/zyga/Canonical/ubuntu-qa/qemu-try-2/qemu-kvm-0.12.3+noroms/cpu-exec.c:172
        tb = Cannot access memory at address 0xffffffffffffffd2

From the qemu-kvm -O2 (stock lucid):
(gdb) thread apply all bt full

Thread 1 (Thread 0x7ffff7fc7760 (LWP 30205)):
#0 0xffffffffcdc546ec in ?? ()
No symbol table info available.
#1 0x00000000000000eb in ?? ()
No symbol table info available.
#2 0x0000000000567064 in tlb_set_page (env=0x4, address=13491680, access_type=3584, mmu_idx=0, is_softmmu=13476464)
    at /build/buildd/qemu-kvm-0.12.3+noroms/exec-all.h:98
No locals.
#3 cpu_arm_handle_mmu_fault (env=0x4, address=13491680, access_type=3584, mmu_idx=0, is_softmmu=13476464)
    at /build/buildd/qemu-kvm-0.12.3+noroms/target-arm/helper.c:1178
        phys_addr = 102251520
        prot = 1
        ret = <value optimized out>
        is_user = <value optimized out>
#4 0x0000000000562151 in tlb_fill (addr=3930382336, is_write=<value optimized out>, mmu_idx=<value optimized out>, retaddr=0x0)
    at /build/buildd/qemu-kvm-0.12.3+noroms/target-arm/op_helper.c:98
        tb = <value optimized out>
        saved_env = 0x1
        ret = <value optimized out>
#5 0x0000000000514aa9 in __ldb_cmmu (addr=240640, mmu_idx=1) at /build/buildd/qemu-kvm-0.12.3+noroms/softmmu_template.h:131
        res = <value optimized out>
        index = 55297
        tlb_addr = <value optimized out>
        addend = <value optimized out>
#6 0x0000000000515a78 in cpu_arm_exec (env1=<value optimized out>) at /build/buildd/qemu-kvm-0.12.3+noroms/cpu-exec.c:630
        reg_AREG0 = <value optimized out>
        saved_AREG0 = 0xcda270
        reg_AREG1 = <value optimized out>
        saved_AREG1 = 0x0
        reg_AREG2 = <value optimized out>
        saved_AREG2 = 0x431bde82d7b634db
        ret = <value optimized out>
        interrupt_request = <value optimized out>
        tb = <value optimized out>
        next_tb = 3584
#7 0x000000000040dfd3 in qemu_cpu_exec (argc=<value optimized out>, argv=<value optimized out>, envp=<value optimized out>)
    at /build/buildd/qemu-kvm-0.12.3+noroms/vl.c:4073
No locals.
#8 tcg_cpu_exec (argc=<value optimized out>, argv=<value optimized out>, envp=<value optimized out>) at /build/buildd/qemu-kvm-0.12.3+noroms/vl.c:4102
---Type <return> to continue, or q <return> to quit---
        ret = -364584960
#9 main_loop (argc=<value optimized out>, argv=<value optimized out>, envp=<value optimized out>) at /build/buildd/qemu-kvm-0.12.3+noroms/vl.c:4226
        r = <value optimized out>
#10 main (argc=<value optimized out>, argv=<value optimized out>, envp=<value optimized out>) at /build/buildd/qemu-kvm-0.12.3+noroms/vl.c:6238
        gdbstub_dev = 0x0
        boot_devices_bitmap = 0
        i = <value optimized out>
        snapshot = 0
        initrd_filename = 0x7fffffffe9f8 "initrd.gz"
        kernel_filename = 0x7fffffffe9e8 "vmlinuz"
        kernel_cmdline = 0x7fffffffea19 "mem=256M"
        boot_devices = "cad", '\000' <repeats 29 times>
        dcl = <value optimized out>
        cyls = 0
        heads = 0
        secs = 0
        translation = 0
        hda_opts = 0xc9b380
        opts = <value optimized out>
        optind = <value optimized out>
        r = <value optimized out>
        optarg = <value optimized out>
        loadvm = 0x0
        machine = <value optimized out>
        cpu_model = 0x7fffffffe9d6 "cortex-a8"
        fds = {-10656, 32767}
        tb_size = 0
        pid_file = 0x0
        incoming = 0x0
        fd = <value optimized out>
        pwd = <value optimized out>
        chroot_dir = 0x0
        run_as = 0x0
        env = <value optimized out>