I realize this monologue might be odd, or maybe tiresome. However I am
trying to resolve this issue so I am digging deeper into the source
code.
Following the code inside the macro, it seems like
(gdb) p live_mfn_to_pfn_table
$13 = (long unsigned int *) 0x0
so the code that does
live_mfn_to_pfn_table[_mfn]
results in
(gdb) p live_mfn_to_pfn_table[mfn]
Cannot access memory at address 0x66aa0
So it seems to me, in my quick look that
live_mfn_to_pfn_table =
xc_map_foreign_range(xc_handle, DOMID_XEN,
PAGE_SIZE*1024, PROT_READ,
mfn_to_pfn_table_start_mfn );
returns 0
which seems to be a ok value for it to return...
cheers
Arthur
-----
CTO @ Fotango Ltd
+447834716919
http://www.fotango.com/
On 1 Feb 2005, at 17:26, Arthur Bergman wrote:
And now with debugging turned in libcx.so.2.0
0x40026868 in xc_linux_save (xc_handle=8, ioctxt=0xbffff8f0) at
xc_linux_save.c:516
516 if (
!translate_mfn_to_pfn(&pfn_to_mfn_frame_list[i/1024]) ){
(gdb) bt
#0 0x40026868 in xc_linux_save (xc_handle=8, ioctxt=0xbffff8f0) at
xc_linux_save.c:516
#1 0x0804d546 in xen_domain_snd (xend=0xbffffb20, io=0x805fbe0, dom=2,
vmconfig=0x805f6d8 "(domain (id 2) (name test) (memory 128)
(maxmem 131072) (state -b---) (cpu 0) (cpu_time 4.059911993) (up_time
1064.72708416) (start_time 1107281260.96) (console (status listening)
(id 17) (domain 2) ("..., vmconfig_n=666, live=0, resource=0) at
xen_domain.c:103
#2 0x0804befb in xfr_save (args=0x805d87c, state=0xbffffa50,
xend=0xbffffb20, file=0x805f9b8 "/tmp/bla") at xfrd.c:774
#3 0x0804c8d3 in xfrd_service (args=0x805d87c, peersock=6, peer_in=
{sin_family = 2, sin_port = 44804, sin_addr = {s_addr =
16777343}, sin_zero = "\000\000\000\000\000\000\000"}) at xfrd.c:950
#4 0x0804ccf4 in xfrd_accept (args=0x805d87c, sock=2) at xfrd.c:1024
#5 0x0804ce01 in xfrd_select (args=0x805d87c, listen_sock=2) at
xfrd.c:1054
#6 0x0804d0f1 in xfrd_main (args=0x805d87c) at xfrd.c:1210
#7 0x0804d273 in main (argc=1, argv=0xbffffe24) at xfrd.c:1264
(gdb) p i
$2 = 0
(gdb) p pfn_to_mfn_frame_list[i/1024]
$3 = 105128
(gdb) p &pfn_to_mfn_frame_list[i/1024]
$4 = (long unsigned int *) 0xbfffcea0
Anything in particular I should start looking at?
-----
CTO @ Fotango Ltd
+447834716919
http://www.fotango.com/
On 1 Feb 2005, at 17:14, Arthur Bergman wrote:
And slightly bit more..
gdb xfrd
(gdb) set follow-fork-mode child
(gdb) run
Starting program: /usr/sbin/xfrd
Program received signal SIGSEGV, Segmentation fault.
[Switching to process 13699]
0x40026808 in xc_linux_save () from /usr/lib/libxc.so.2.0
(gdb) bt
#0 0x40026808 in xc_linux_save () from /usr/lib/libxc.so.2.0
#1 0x0804d546 in xen_domain_snd (xend=0xbffffb20, io=0x805fbe0,
dom=2,
vmconfig=0x805f6d8 "(domain (id 2) (name test) (memory 128)
(maxmem 131072) (state -b---) (cpu 0) (cpu_time 4.030152025) (up_time
611.702224016) (start_time 1107281260.96) (console (status listening)
(id 17) (domain 2) ("..., vmconfig_n=666, live=0, resource=0) at
xen_domain.c:103
#2 0x0804befb in xfr_save (args=0x805d87c, state=0xbffffa50,
xend=0xbffffb20, file=0x805f9b8 "/tmp/bla") at xfrd.c:774
#3 0x0804c8d3 in xfrd_service (args=0x805d87c, peersock=6, peer_in=
{sin_family = 2, sin_port = 44292, sin_addr = {s_addr =
16777343}, sin_zero = "\000\000\000\000\000\000\000"}) at xfrd.c:950
#4 0x0804ccf4 in xfrd_accept (args=0x805d87c, sock=2) at xfrd.c:1024
#5 0x0804ce01 in xfrd_select (args=0x805d87c, listen_sock=2) at
xfrd.c:1054
#6 0x0804d0f1 in xfrd_main (args=0x805d87c) at xfrd.c:1210
#7 0x0804d273 in main (argc=1, argv=0xbffffe24) at xfrd.c:1264
(gdb)
I guess I am going to need to recompile with debugging on.
Cheers
Arthur
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