> gdb /usr/ports/emulators/qemu/work/qemu-snapshot-2006-12-25_05/i386-softmmu/qemu qemu.core
GNU gdb 6.1.1 [FreeBSD]
Copyright 2004 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "amd64-marcel-freebsd"...
Core was generated by `qemu'.
Program terminated with signal 10, Bus error.
Reading symbols from /lib/libm.so.4...done.
Loaded symbols for /lib/libm.so.4
Reading symbols from /lib/libz.so.3...done.
Loaded symbols for /lib/libz.so.3
Reading symbols from /lib/libutil.so.6...done.
Loaded symbols for /lib/libutil.so.6
Reading symbols from /lib/libc.so.7...done.
Loaded symbols for /lib/libc.so.7
Reading symbols from /libexec/ld-elf.so.1...done.
Loaded symbols for /libexec/ld-elf.so.1
#0  0x00000000004aac96 in tb_find_fast () at /usr/ports/emulators/qemu/work/qemu-snapshot-2006-12-25_05/cpu-exec.c:208
208         tb = env->tb_jmp_cache[tb_jmp_cache_hash_func(pc)];
(gdb) info thr
* 1 process 100080  0x00000000004aac96 in tb_find_fast () at /usr/ports/emulators/qemu/work/qemu-snapshot-2006-12-25_05/cpu-exec.c:208
(gdb) bt full
#0  0x00000000004aac96 in tb_find_fast () at /usr/ports/emulators/qemu/work/qemu-snapshot-2006-12-25_05/cpu-exec.c:208
        tb = (TranslationBlock *) 0x800b0731b
        cs_base = 103600
        pc = 83488
        flags = 1709095707
#1  0x00000000004aaaf7 in cpu_x86_exec (env1=0x0) at /usr/ports/emulators/qemu/work/qemu-snapshot-2006-12-25_05/cpu-exec.c:658
        saved_T0 = 0
        saved_T1 = -6360
        saved_T2 = 0
        saved_env = (CPUX86State *) 0x0
        ret = 0
        interrupt_request = 2
        gen_func = (void (*)(void)) 0
        tb = (TranslationBlock *) 0x0
        tc_ptr = (__uint8_t *) 0x0
Previous frame inner to this frame (corrupt stack?)
(gdb) 



> gdb /usr/ports/emulators/qemu/work/qemu-snapshot-2006-12-25_05/x86_64-softmmu/qemu-system-x86_64 qemu-system-x86_64.core 
GNU gdb 6.1.1 [FreeBSD]
Copyright 2004 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "amd64-marcel-freebsd"...

warning: core file may not match specified executable file.
Core was generated by `qemu-system-x86_64'.
Program terminated with signal 11, Segmentation fault.
Reading symbols from /lib/libm.so.4...done.
Loaded symbols for /lib/libm.so.4
Reading symbols from /lib/libz.so.3...done.
Loaded symbols for /lib/libz.so.3
Reading symbols from /lib/libutil.so.6...done.
Loaded symbols for /lib/libutil.so.6
Reading symbols from /lib/libc.so.7...done.
Loaded symbols for /lib/libc.so.7
Reading symbols from /libexec/ld-elf.so.1...done.
Loaded symbols for /libexec/ld-elf.so.1
#0  0x00000000004a816e in tlb_set_page_exec (env=0x8010d0000, vaddr=0, paddr=0, prot=7, is_user=-6376, is_softmmu=1)
    at /usr/ports/emulators/qemu/work/qemu-snapshot-2006-12-25_05/exec.c:1504
1504            te->addend = addend;
(gdb) info thr
* 1 process 100116  0x00000000004a816e in tlb_set_page_exec (env=0x8010d0000, vaddr=0, paddr=0, prot=7, is_user=-6376, is_softmmu=1)
    at /usr/ports/emulators/qemu/work/qemu-snapshot-2006-12-25_05/exec.c:1504
(gdb) bt full
#0  0x00000000004a816e in tlb_set_page_exec (env=0x8010d0000, vaddr=0, paddr=0, prot=7, is_user=-6376, is_softmmu=1)
    at /usr/ports/emulators/qemu/work/qemu-snapshot-2006-12-25_05/exec.c:1504
        p = (PhysPageDesc *) 0x800683000
        pd = 0
        index = 0
        address = 0
        addend = 34378612736
        ret = 0
        te = (CPUTLBEntry *) 0x7fdf004d0
#1  0x00000000004f3378 in cpu_x86_handle_mmu_fault (env=0x8010d0000, addr=0, is_write1=0, is_user=-6376, is_softmmu=1)
    at /usr/ports/emulators/qemu/work/qemu-snapshot-2006-12-25_05/target-i386/helper2.c:867
        ptep = 34366495744
        pte = 0
        pdpe_addr = 8
        pde_addr = 6757376
        pte_addr = 8
        error_code = 6756352
        is_dirty = 8
        prot = 7
        page_size = 4096
        ret = 6754304
        is_write = 0
        paddr = 0
        page_offset = 0
        vaddr = 0
        virt_addr = 0
#2  0x00000000004f1359 in tlb_fill (addr=0, is_write=0, is_user=-6376, retaddr=0x0)
    at /usr/ports/emulators/qemu/work/qemu-snapshot-2006-12-25_05/target-i386/helper.c:3829
        tb = (TranslationBlock *) 0x0
        ret = 0
        pc = 0
        saved_env = (CPUX86State *) 0x0
Previous frame inner to this frame (corrupt stack?)
(gdb)