Re: [Qemu-devel] [PATCH 0/2] Fix wide ioport access cracking

From: Gerhard Wiesinger <lists@wiesinger.com>
To: Avi Kivity <avi@redhat.com>
Cc: qemu-devel@nongnu.org, kvm@vger.kernel.org
Subject: Re: [Qemu-devel] [PATCH 0/2] Fix wide ioport access cracking
Date: Thu, 11 Aug 2011 18:08:18 +0200 (CEST)	[thread overview]
Message-ID: <alpine.LFD.2.02.1108111807260.27291@bbs.intern> (raw)
In-Reply-To: <4E43A482.5040401@redhat.com>

On Thu, 11 Aug 2011, Avi Kivity wrote:

> On 08/11/2011 12:01 PM, Gerhard Wiesinger wrote:
>> Hello Avi,
>> 
>> #0  0x0000003a060328f5 in raise () from /lib64/libc.so.6
>> #1  0x0000003a060340d5 in abort () from /lib64/libc.so.6
>> #2  0x0000003a0602b8b5 in __assert_fail () from /lib64/libc.so.6
>> #3  0x0000000000435339 in memory_region_del_subregion (mr=<value optimized 
>> out>, subregion=<value optimized out>)    at 
>> /root/download/qemu/git/qemu-kvm-test/memory.c:1168
>> #4  0x000000000041eb9b in pci_update_mappings (d=0x1a90bc0) at 
>> /root/download/qemu/git/qemu-kvm-test/hw/pci.c:1134
>> #5  0x0000000000420a9c in pci_default_write_config (d=0x1a90bc0, addr=4, 
>> val=<value optimized out>, l=<value optimized out>)     at 
>> /root/download/qemu/git/qemu-kvm-test/hw/pci.c:1213
>> #6  0x00000000004329a6 in kvm_handle_io (env=0x1931af0) at 
>> /root/download/qemu/git/qemu-kvm-test/kvm-all.c:858
>> #7  kvm_cpu_exec (env=0x1931af0) at 
>> /root/download/qemu/git/qemu-kvm-test/kvm-all.c:997
>> #8  0x000000000040bd4a in qemu_kvm_cpu_thread_fn (arg=0x1931af0) at 
>> /root/download/qemu/git/qemu-kvm-test/cpus.c:806
>> #9  0x0000003a06807761 in start_thread () from /lib64/libpthread.so.0
>> #10 0x0000003a060e098d in clone () from /lib64/libc.so.6
>> 
>
> In frame 4, can you print out i, *r, and d->io_regions[0 through 6]?  Some of 
> them may be optimized out unfortunately.

See below.

Ciao,
Gerhard

(gdb) frame 4
#4  0x000000000041eb9b in pci_update_mappings (d=0x1a90bc0)
     at /root/download/qemu/git/qemu-kvm-test/hw/pci.c:1134
1134                memory_region_del_subregion(r->address_space, 
r->memory);
(gdb) print i
$1 = <value optimized out>
(gdb) print *r
$2 = {addr = 22058952032257, size = 32, filtered_size = 
171717340864446496,
   type = 1 '\001', memory = 0x1a90000, address_space = 0x200019282f0}
(gdb) print d->io_regions[0]
$3 = {addr = 22058952032257, size = 32, filtered_size = 
171717340864446496,
   type = 1 '\001', memory = 0x1a90000, address_space = 0x200019282f0}
(gdb) print d->io_regions[1]
$4 = {addr = 17113088, size = 32, filtered_size = 32, type = 0 '\000',
   memory = 0x1a911c8, address_space = 0x1920000}
(gdb) print d->io_regions[2]
$5 = {addr = 0, size = 0, filtered_size = 0, type = 0 '\000', memory = 
0x0,
   address_space = 0x0}
(gdb) print d->io_regions[3]
$6 = {addr = 0, size = 0, filtered_size = 0, type = 239 '\357', memory = 
0x0,
   address_space = 0x0}
(gdb) print d->io_regions[4]
$7 = {addr = 0, size = 0, filtered_size = 0, type = 0 '\000', memory = 
0x0,
   address_space = 0x0}
(gdb) print d->io_regions[5]
$8 = {addr = 0, size = 0, filtered_size = 0, type = 0 '\000', memory = 
0x0,
   address_space = 0x0}
(gdb) print d->io_regions[6]
$9 = {addr = 0, size = 0, filtered_size = 0, type = 0 '\000', memory = 
0x0,
   address_space = 0x0}

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