[Bug gdb/26876] New: gdb error: internal-error: Unknown CFA rule when debugging the linux kernel with qemu

[Bug gdb/26876] New: gdb error: internal-error: Unknown CFA rule when debugging the linux kernel with qemu

[robert at robertbuhren dot de]

https://sourceware.org/bugzilla/show_bug.cgi?id=26876

            Bug ID: 26876
           Summary: gdb error: internal-error: Unknown CFA rule when
                    debugging the linux kernel with qemu
           Product: gdb
           Version: 10.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: gdb
          Assignee: unassigned at sourceware dot org
          Reporter: robert at robertbuhren dot de
  Target Milestone: ---

Created attachment 12952
  --> https://sourceware.org/bugzilla/attachment.cgi?id=12952&action=edit
linux kernel config

Hi all,

I'm trying to debug a linux kernel issue using gdb. I'm essentially following
this tutorial:
https://www.kernel.org/doc/html/v5.9/dev-tools/gdb-kernel-debugging.html

When I execute "lx-symbols", I get the error mentioned in the header.

I'm using GNU gdb (GDB) 10.1 on archlinux with gcc version 10.2.0 (GCC) and
QEMU emulator version 5.1.0

I have attached the kernel config. The binary exceeds the upload limit. I can
provide it upon request.
The kernel is based on commit: 9ff9b0d392ea08090cd1780fb196f36dbb586529

Here's the exact output of my gdb debugging session:

[I] ~/S/R/S/linux (master|…) $ gdb vmlinux                                     
GNU gdb (GDB) 10.1                                                             
Copyright (C) 2020 Free Software Foundation, Inc.                            
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.              
There is NO WARRANTY, to the extent permitted by law.                           
Type "show copying" and "show warranty" for details.           
This GDB was configured as "x86_64-pc-linux-gnu".                               
Type "show configuration" for configuration details.                            
For bug reporting instructions, please see:                                     
<https://www.gnu.org/software/gdb/bugs/>.                       
Find the GDB manual and other documentation resources online at:                
    <http://www.gnu.org/software/gdb/documentation/>.                           

For help, type "help".                                                         
Type "apropos word" to search for commands related to "word"...                
Reading symbols from vmlinux...        
(gdb) tar rem :1234                            
Remote debugging using :1234                                                    
0x000000000000fff0 in exception_stacks ()                                      
(gdb) c                                                                        
Continuing.                                                                    
^C                                                                              
Program received signal SIGINT, Interrupt.                                      
default_idle () at arch/x86/kernel/process.c:688                                
688             safe_halt();                                                   
(gdb) lx-symbols                                                               
loading vmlinux                                                                 
scanning for modules in /home/robert/Sec-T/Research/SEV-dev-fuzz/linux
../../gdb/dwarf2/frame.c:1085: internal-error: Unknown CFA rule.
A problem internal to GDB has been detected,                                    
further debugging may prove unreliable.
Quit this debugging session? (y or n) y                                        

This is a bug, please report it.  For instructions, see:                        
<https://www.gnu.org/software/gdb/bugs/>.                                       

../../gdb/dwarf2/frame.c:1085: internal-error: Unknown CFA rule.                
A problem internal to GDB has been detected,                                    
further debugging may prove unreliable.        
Create a core file of GDB? (y or n) y                                           
fish: “gdb vmlinux” terminated by signal SIGABRT (Abort)

I'm happy to provide additional details if needed.

Regards,

Robert

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[Bug gdb/26876] gdb error: internal-error: Unknown CFA rule when debugging the linux kernel with qemu

[simark at simark dot ca]

https://sourceware.org/bugzilla/show_bug.cgi?id=26876

Simon Marchi <simark at simark dot ca> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |simark at simark dot ca

--- Comment #1 from Simon Marchi <simark at simark dot ca> ---
I've built the kernel using the commit and the config you provided. Can you
summarize who to run the resulting kernel in qemu?  Do I have to create a VM,
install a distribution in it and install my built kernel in it?

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[Bug gdb/26876] gdb error: internal-error: Unknown CFA rule when debugging the linux kernel with qemu

[simark at simark dot ca]

https://sourceware.org/bugzilla/show_bug.cgi?id=26876

--- Comment #2 from Simon Marchi <simark at simark dot ca> ---
Well, to my surprise, I managed to reproduce!

1. I installed an ubuntu 20.04 guest in qemu
2. I built and installed a kernel in it
3. I debugged the qemu guest (add -s to the qemu command line, don't forget to
pass nokaslr to the Linux kernel)

First, the backtrace:

#0  0x000055befa524260 in execute_cfa_program (fde=0x621000f84c90,
insn_ptr=0x7fab8d86da86 <error: Cannot access memory at address
0x7fab8d86da86>, insn_end=0x7fab8d86da90 <error: Cannot access memory at
address 0x7fab8d86da90>, gdbarch=0x621000be3d10, pc=0xffffffff81b3318e,
fs=0x7ffe0a288d10, text_offset=0x0) at
/home/smarchi/src/binutils-gdb/gdb/dwarf2/frame.c:367
#1  0x000055befa52bf02 in dwarf2_frame_cache (this_frame=0x6210006cfde0,
this_cache=0x6210006cfdf8) at
/home/smarchi/src/binutils-gdb/gdb/dwarf2/frame.c:1025
#2  0x000055befa52ea38 in dwarf2_frame_this_id (this_frame=0x6210006cfde0,
this_cache=0x6210006cfdf8, this_id=0x6210006cfe40) at
/home/smarchi/src/binutils-gdb/gdb/dwarf2/frame.c:1226
#3  0x000055befa8dde95 in compute_frame_id (fi=0x6210006cfde0) at
/home/smarchi/src/binutils-gdb/gdb/frame.c:588
#4  0x000055befa8de53e in get_frame_id (fi=0x6210006cfde0) at
/home/smarchi/src/binutils-gdb/gdb/frame.c:636
#5  0x000055befa8ecf33 in get_prev_frame (this_frame=0x6210006cfde0) at
/home/smarchi/src/binutils-gdb/gdb/frame.c:2504
#6  0x000055befb1ff582 in frame_info_to_frame_object (frame=0x6210006cfde0) at
/home/smarchi/src/binutils-gdb/gdb/python/py-frame.c:364
#7  0x000055befb201016 in gdbpy_newest_frame (self=0x7fabbcb11a40, args=0x0) at
/home/smarchi/src/binutils-gdb/gdb/python/py-frame.c:599
#8  0x00007fabc25f01aa in cfunction_vectorcall_NOARGS (func=0x7fabbca78d60,
args=<optimized out>, nargsf=<optimized out>, kwnames=<optimized out>) at
../Objects/methodobject.c:459
#9  0x00007fabc2405d6d in _PyObject_Vectorcall (kwnames=<optimized out>,
nargsf=<optimized out>, args=<optimized out>, callable=<optimized out>) at
../Include/cpython/abstract.h:127
#10 call_function (tstate=0x612000009940, pp_stack=0x7ffe0a289370,
oparg=<optimized out>, kwnames=0x0) at ../Python/ceval.c:4963
#11 0x00007fabc240def6 in _PyEval_EvalFrameDefault (f=<optimized out>,
throwflag=<optimized out>) at ../Python/ceval.c:3469
#12 0x00007fabc241106b in function_code_fastcall (co=<optimized out>,
args=<optimized out>, nargs=1, globals=<optimized out>) at
../Objects/call.c:283
#13 0x00007fabc2405d6d in _PyObject_Vectorcall (kwnames=<optimized out>,
nargsf=<optimized out>, args=<optimized out>, callable=<optimized out>) at
../Include/cpython/abstract.h:127
#14 call_function (tstate=0x612000009940, pp_stack=0x7ffe0a289540,
oparg=<optimized out>, kwnames=0x0) at ../Python/ceval.c:4963
#15 0x00007fabc240def6 in _PyEval_EvalFrameDefault (f=<optimized out>,
throwflag=<optimized out>) at ../Python/ceval.c:3469
#16 0x00007fabc241106b in function_code_fastcall (co=<optimized out>,
args=<optimized out>, nargs=2, globals=<optimized out>) at
../Objects/call.c:283
#17 0x00007fabc2405d6d in _PyObject_Vectorcall (kwnames=<optimized out>,
nargsf=<optimized out>, args=<optimized out>, callable=<optimized out>) at
../Include/cpython/abstract.h:127
#18 call_function (tstate=0x612000009940, pp_stack=0x7ffe0a289710,
oparg=<optimized out>, kwnames=0x0) at ../Python/ceval.c:4963
#19 0x00007fabc2407018 in _PyEval_EvalFrameDefault (f=<optimized out>,
throwflag=<optimized out>) at ../Python/ceval.c:3486
#20 0x00007fabc255bd3b in _PyEval_EvalCodeWithName (_co=<optimized out>,
globals=<optimized out>, locals=<optimized out>, args=<optimized out>,
argcount=1, kwnames=0x0, kwargs=0x7fabbcb17d98, kwcount=0, kwstep=1, defs=0x0,
defcount=0, kwdefs=0x0, closure=0x7fabbca970a0, name=0x7fabbcbc9470,
qualname=0x7faba48cfc90) at ../Python/ceval.c:4298
#21 0x00007fabc2638de4 in _PyFunction_Vectorcall (func=<optimized out>,
stack=<optimized out>, nargsf=<optimized out>, kwnames=<optimized out>) at
../Objects/call.c:435
#22 0x00007fabc2405d6d in _PyObject_Vectorcall (kwnames=<optimized out>,
nargsf=<optimized out>, args=<optimized out>, callable=<optimized out>) at
../Include/cpython/abstract.h:127
#23 call_function (tstate=0x612000009940, pp_stack=0x7ffe0a2899c8,
oparg=<optimized out>, kwnames=0x0) at ../Python/ceval.c:4963
#24 0x00007fabc240746d in _PyEval_EvalFrameDefault (f=<optimized out>,
throwflag=<optimized out>) at ../Python/ceval.c:3500
#25 0x00007fabc255bd3b in _PyEval_EvalCodeWithName (_co=<optimized out>,
globals=<optimized out>, locals=<optimized out>, args=<optimized out>,
argcount=1, kwnames=0x0, kwargs=0x7faba4734c50, kwcount=0, kwstep=1, defs=0x0,
defcount=0, kwdefs=0x0, closure=0x0, name=0x7faba4742a30,
qualname=0x7faba4736210) at ../Python/ceval.c:4298
#26 0x00007fabc2638de4 in _PyFunction_Vectorcall (func=<optimized out>,
stack=<optimized out>, nargsf=<optimized out>, kwnames=<optimized out>) at
../Objects/call.c:435
#27 0x00007fabc2405d6d in _PyObject_Vectorcall (kwnames=<optimized out>,
nargsf=<optimized out>, args=<optimized out>, callable=<optimized out>) at
../Include/cpython/abstract.h:127
#28 call_function (tstate=0x612000009940, pp_stack=0x7ffe0a289c70,
oparg=<optimized out>, kwnames=0x0) at ../Python/ceval.c:4963
#29 0x00007fabc2407018 in _PyEval_EvalFrameDefault (f=<optimized out>,
throwflag=<optimized out>) at ../Python/ceval.c:3486
#30 0x00007fabc241106b in function_code_fastcall (co=<optimized out>,
args=<optimized out>, nargs=3, globals=<optimized out>) at
../Objects/call.c:283
#31 0x00007fabc2639da8 in _PyObject_Vectorcall (kwnames=0x0, nargsf=3,
args=0x7ffe0a289d80, callable=0x7faba48d8430) at
../Include/cpython/abstract.h:127
#32 _PyObject_FastCall (nargs=3, args=0x7ffe0a289d80, func=0x7faba48d8430) at
../Include/cpython/abstract.h:147
#33 object_vacall (base=base@entry=0x7faba48da080, callable=0x7faba48d8430,
vargs=vargs@entry=0x7ffe0a289e10) at ../Objects/call.c:1186
#34 0x00007fabc263a14c in PyObject_CallMethodObjArgs (obj=0x7faba48da080,
name=<optimized out>) at ../Objects/call.c:1214
#35 0x000055befb1f0966 in cmdpy_function (command=0x6110001d2d00,
args=0x55befd892b20 "", from_tty=1) at
/home/smarchi/src/binutils-gdb/gdb/python/py-cmd.c:141
#36 0x000055befa256cb4 in cmd_func (cmd=0x6110001d2d00, args=0x0, from_tty=1)
at /home/smarchi/src/binutils-gdb/gdb/cli/cli-decode.c:2181
#37 0x000055befb9c2ace in execute_command (p=0x60200005109b "", from_tty=1) at
/home/smarchi/src/binutils-gdb/gdb/top.c:668
#38 0x000055befa858fca in command_handler (command=0x602000051090 "lx-symbols
") at /home/smarchi/src/binutils-gdb/gdb/event-top.c:589
#39 0x000055befa859cc5 in command_line_handler (rl=...) at
/home/smarchi/src/binutils-gdb/gdb/event-top.c:774
#40 0x000055befa856f93 in gdb_rl_callback_handler (rl=0x602000051010
"lx-symbols ") at /home/smarchi/src/binutils-gdb/gdb/event-top.c:219
#41 0x000055befbda9a4d in rl_callback_read_char () at
/home/smarchi/src/binutils-gdb/readline/readline/callback.c:281
#42 0x000055befa8569d4 in gdb_rl_callback_read_char_wrapper_noexcept () at
/home/smarchi/src/binutils-gdb/gdb/event-top.c:177
#43 0x000055befa856c02 in gdb_rl_callback_read_char_wrapper
(client_data=0x60f000000310) at
/home/smarchi/src/binutils-gdb/gdb/event-top.c:194
#44 0x000055befa85856c in stdin_event_handler (error=0,
client_data=0x60f000000310) at
/home/smarchi/src/binutils-gdb/gdb/event-top.c:516
#45 0x000055befcec2717 in handle_file_event (file_ptr=0x606000069260,
ready_mask=1) at /home/smarchi/src/binutils-gdb/gdbsupport/event-loop.cc:575
#46 0x000055befcec2f58 in gdb_wait_for_event (block=1) at
/home/smarchi/src/binutils-gdb/gdbsupport/event-loop.cc:701
#47 0x000055befcec0cf6 in gdb_do_one_event () at
/home/smarchi/src/binutils-gdb/gdbsupport/event-loop.cc:237
#48 0x000055befadfda4e in start_event_loop () at
/home/smarchi/src/binutils-gdb/gdb/main.c:347
#49 0x000055befadfde7d in captured_command_loop () at
/home/smarchi/src/binutils-gdb/gdb/main.c:407
#50 0x000055befae02861 in captured_main (data=0x7ffe0a28ab80) at
/home/smarchi/src/binutils-gdb/gdb/main.c:1234
#51 0x000055befae02944 in gdb_main (args=0x7ffe0a28ab80) at
/home/smarchi/src/binutils-gdb/gdb/main.c:1249
#52 0x000055bef9c3e442 in main (argc=2, argv=0x7ffe0a28acf8) at
/home/smarchi/src/binutils-gdb/gdb/gdb.c:32

So we are executing the CIE of this FDE:

(top-gdb) p *fde
$4 = {
  cie = 0x621000f84bb0,
  initial_location = 0xffffffff81b33180,
  address_range = 0xf,
  instructions = 0x7fab8d86db08 <error: Cannot access memory at address
0x7fab8d86db08>,
  end = 0x7fab8d86db08 <error: Cannot access memory at address 0x7fab8d86db08>,
  eh_frame_p = 0 '\000'
}

It's really strange that top-gdb can't access the memory of the program we are
supposed to be executing:

(top-gdb) p insn_ptr
$9 = (const gdb_byte *) 0x7fab8d86da86 <error: Cannot access memory at address
0x7fab8d86da86>
(top-gdb) p fde.cie.initial_instructions 
$10 = (const gdb_byte *) 0x7fab8d86da85 <error: Cannot access memory at address
0x7fab8d86da85>

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[Bug gdb/26876] gdb error: internal-error: Unknown CFA rule when debugging the linux kernel with qemu

[simark at simark dot ca]

https://sourceware.org/bugzilla/show_bug.cgi?id=26876

Simon Marchi <simark at simark dot ca> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |tromey at sourceware dot org
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2020-11-14
     Ever confirmed|0                           |1

--- Comment #3 from Simon Marchi <simark at simark dot ca> ---
It works on GDB 9.2, so I bisected it.  The first failing commit is
3d4560f707b077adfb54759df5efbd96301ca2d8 ("Move the frame data to the BFD when
possible").  It make sense, because there appear to be some lifetime problem or
something like that related to the frame data.

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[Bug gdb/26876] gdb error: internal-error: Unknown CFA rule when debugging the linux kernel with qemu

[robert at robertbuhren dot de]

https://sourceware.org/bugzilla/show_bug.cgi?id=26876

--- Comment #4 from robert at robertbuhren dot de ---
Hi, 
thanks for looking into this. I forgot to include my qemu setup, sorry for
that. There is no need to use any kind of guest OS to trigger the bug:

qemu-system-x86_64 -enable-kvm -m 4096 -smp 1 -kernel
linux/arch/x86/boot/bzImage -append "console=ttyS0 nokaslr" -S -s -nographic
-monitor tcp::4444,server,nowait -serial stdio

I let the kernel boot (it will panic because there is no /init to execute) and
then simply stop it via "CTRL-C": 

GNU gdb (GDB) 10.1
Copyright (C) 2020 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/g>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
Type "show copying" and "show warranty" for details.
This GDB was configured as "x86_64-pc-linux-gnu".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<https://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
    <http://www.gnu.org/software/gdb/documentation/>.

For help, type "help".
Type "apropos word" to search for commands related to "word".
(gdb) file vmlinux
Reading symbols from vmlinux...
(gdb) tar rem :1234
Remote debugging using :1234
0x000000000000fff0 in exception_stacks ()
(gdb) c
Continuing.
^C
Program received signal SIGINT, Interrupt.
0xffffffff814222e0 in rdtsc_ordered ()
    at ./arch/x86/include/asm/msr.h:234
234             asm volatile(ALTERNATIVE_2("rdtsc",
(gdb) lx-symbols 
loading vmlinux
../../gdb/dwarf2/frame.c:1085: internal-error: Unknown CFA rule.
A problem internal to GDB has been detected,
further debugging may prove unreliable.
Quit this debugging session? (y or n) y
This is a bug, please report it.  For instructions, see:
<https://www.gnu.org/software/gdb/bugs/>.

../../gdb/dwarf2/frame.c:1085: internal-error: Unknown CFA rule.
A problem internal to GDB has been detected,
further debugging may prove unreliable.
Create a core file of GDB? (y or n) y
fish: “gdb” terminated by signal SIGABRT (Abort)

Regards,
Robert

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[Bug gdb/26876] gdb error: internal-error: Unknown CFA rule when debugging the linux kernel with qemu

[simark at simark dot ca]

https://sourceware.org/bugzilla/show_bug.cgi?id=26876

--- Comment #5 from Simon Marchi <simark at simark dot ca> ---
Strange, I can't reproduce using that technique.  It just says "loading
vmlinux" and  goes back to the prompt.

When I use the guest OK, it either finds some modules:

loading vmlinux                                                                 
scanning for modules in /home/smarchi/src/linux                                 
loading @0xffffffffc0119000: /home/smarchi/src/linux/arch/x86/kvm/kvm-amd.ko    
loading @0xffffffffc0103000: /home/smarchi/src/linux/drivers/crypto/ccp/ccp.ko  
loading @0xffffffffc00fe000: /home/smarchi/src/linux/crypto/sha1_generic.ko     
loading @0xffffffffc004d000: /home/smarchi/src/linux/arch/x86/kvm/kvm.ko        
loading @0xffffffffc0041000: /home/smarchi/src/linux/virt/lib/irqbypass.ko      
loading @0xffffffffc003a000:
/home/smarchi/src/linux/drivers/virtio/virtio_balloon.ko                        
loading @0xffffffffc002d000:
/home/smarchi/src/linux/drivers/char/virtio_console.ko                          
loading @0xffffffffc0027000:
/home/smarchi/src/linux/drivers/block/virtio_blk.ko                             
loading @0xffffffffc0019000: /home/smarchi/src/linux/drivers/net/virtio_net.ko  
loading @0xffffffffc0014000:
/home/smarchi/src/linux/drivers/net/net_failover.ko                             
loading @0xffffffffc0048000: /home/smarchi/src/linux/net/core/failover.ko       
loading @0xffffffffc000c000:
/home/smarchi/src/linux/drivers/virtio/virtio_pci.ko                            
loading @0xffffffffc0005000:
/home/smarchi/src/linux/drivers/virtio/virtio_ring.ko                           
loading @0xffffffffc0000000: /home/smarchi/src/linux/drivers/virtio/virtio.ko   

or crashes.

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[Bug gdb/26876] gdb error: internal-error: Unknown CFA rule when debugging the linux kernel with qemu

[tromey at sourceware dot org]

https://sourceware.org/bugzilla/show_bug.cgi?id=26876

--- Comment #6 from Tom Tromey <tromey at sourceware dot org> ---
It looks like find_comp_unit and set_comp_unit have their tests reversed:

  bfd *abfd = objfile->obfd;
  if (gdb_bfd_requires_relocations (abfd))
    return dwarf2_frame_bfd_data.set (abfd, unit);
  return dwarf2_frame_objfile_data.set (objfile, unit);

Seems like it should use the per-BFD when relocations are *not* required.

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[Bug gdb/26876] gdb error: internal-error: Unknown CFA rule when debugging the linux kernel with qemu

[simark at simark dot ca]

https://sourceware.org/bugzilla/show_bug.cgi?id=26876

--- Comment #7 from Simon Marchi <simark at simark dot ca> ---
(In reply to Tom Tromey from comment #6)
> It looks like find_comp_unit and set_comp_unit have their tests reversed:
> 
>   bfd *abfd = objfile->obfd;
>   if (gdb_bfd_requires_relocations (abfd))
>     return dwarf2_frame_bfd_data.set (abfd, unit);
>   return dwarf2_frame_objfile_data.set (objfile, unit);
> 
> Seems like it should use the per-BFD when relocations are *not* required.

Oh, interesting!

When I swap that, I no longer get an ASan crash, but I get:

loading vmlinux
scanning for modules in /home/smarchi/build/linux
loading @0xffffffffc011a000: /home/smarchi/build/linux/arch/x86/kvm/kvm-amd.ko
Python Exception <class 'gdb.MemoryError'> Cannot access memory at address
0xffff868177dcbff0: 
Error occurred in Python: Cannot access memory at address 0xffff868177dcbff0

I should be able to fix set_comp_unit/find_comp_unit in the commit that
introduced those changes and bisect again to find when GDB starts giving this
MemoryError...

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[Bug gdb/26876] gdb error: internal-error: Unknown CFA rule when debugging the linux kernel with qemu

[simark at simark dot ca]

https://sourceware.org/bugzilla/show_bug.cgi?id=26876

--- Comment #8 from Simon Marchi <simark at simark dot ca> ---
I bisected the second problem, it points to this commit:

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=7c6f271296319576fa00587928e5ff52ced9c1bb

GDB trips on the array with no size in the structure.  I filed a new bug here:

https://sourceware.org/bugzilla/show_bug.cgi?id=26901

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[Bug gdb/26876] gdb error: internal-error: Unknown CFA rule when debugging the linux kernel with qemu

[simark at simark dot ca]

https://sourceware.org/bugzilla/show_bug.cgi?id=26876

Simon Marchi <simark at simark dot ca> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |10.2

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[Bug gdb/26876] gdb error: internal-error: Unknown CFA rule when debugging the linux kernel with qemu

[simark at simark dot ca]

https://sourceware.org/bugzilla/show_bug.cgi?id=26876

--- Comment #9 from Simon Marchi <simark at simark dot ca> ---
I sent a patch for the set_comp_unit/find_comp problem:

https://sourceware.org/pipermail/gdb-patches/2020-December/173725.html

I also sent a patch for 26901, so once the two are merged, it should all be
working.

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[Bug gdb/26876] gdb error: internal-error: Unknown CFA rule when debugging the linux kernel with qemu

[cvs-commit at gcc dot gnu.org]

https://sourceware.org/bugzilla/show_bug.cgi?id=26876

--- Comment #10 from cvs-commit at gcc dot gnu.org <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Simon Marchi <simark@sourceware.org>:

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=0bc2e38dd71e24676e180b6b37e0a2cd1186994d

commit 0bc2e38dd71e24676e180b6b37e0a2cd1186994d
Author: Simon Marchi <simon.marchi@polymtl.ca>
Date:   Thu Dec 3 15:47:56 2020 -0500

    gdb: fix logic of find_comp_unit and set_comp_unit

    The logic in find_comp_unit and set_comp_unit is reversed.  When the BFD
    requires relocation, we want to put the comp_unit structure in the
    map where the comp_unit objects are not shared, that is the one indexed
    by objfile.  If the BFD does not require relocation, then, we can share
    a single comp_unit structure for all users of that BFD, so we want to
    put it in the BFD-indexed map.  The comments on top of
    dwarf2_frame_bfd_data and dwarf2_frame_objfile_data make that clear.

    Fix it by swapping the two in find_comp_unit and set_comp_unit.

    I don't have a test for this, because I don't see how to write one in a
    reasonable amount of time.

    gdb/ChangeLog:

            PR gdb/26876
            * dwarf2/frame.c (find_comp_unit, set_comp_unit): Reverse use of
            dwarf2_frame_bfd_data and dwarf2_frame_objfile_data.

    Change-Id: I80c1ee7ad8425fa4947de65b170973d05f5a52ec

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[Bug gdb/26876] gdb error: internal-error: Unknown CFA rule when debugging the linux kernel with qemu

[simark at simark dot ca]

https://sourceware.org/bugzilla/show_bug.cgi?id=26876

Simon Marchi <simark at simark dot ca> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED

--- Comment #11 from Simon Marchi <simark at simark dot ca> ---
Fixed.

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[Bug gdb/26876] gdb error: internal-error: Unknown CFA rule when debugging the linux kernel with qemu

[ahmedsayeed1982 at yahoo dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=26876

Ahmed Sayeed <ahmedsayeed1982 at yahoo dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |ahmedsayeed1982 at yahoo dot com

--- Comment #12 from Ahmed Sayeed <ahmedsayeed1982 at yahoo dot com> ---
For help, type "help".                                                         
Type "apropos word" to search for commands related to "word"...                
Reading symbols from vmlinux...        
(gdb) tar rem :1234                            
Remote debugging using :1234                                                    
0x000000000000fff0 in exception_stacks ()                                      
(gdb) c                                                                        
Continuing.                                                                    
^C                                                                              
Program received signal SIGINT, Interrupt.                                      
default_idle () at arch/x86/kernel/process.c:688                                
688             safe_halt();                                                   
(gdb) lx-symbols                                                               
loading vmlinux                                                                 
scanning for modules in /home/robert/Sec-T/Research/SEV-dev-fuzz/linux
../../gdb/dwarf2/frame.c:1085: internal-error: Unknown CFA rule.
A problem internal to GDB has been detected,  http://ancientmariners.online/    
further debugging may prove unreliable.
Quit this debugging session? (y or n) y

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[Bug gdb/26876] gdb error: internal-error: Unknown CFA rule when debugging the linux kernel with qemu

[ucelsanicin at yahoo dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=26876

Ucel Sani <ucelsanicin at yahoo dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |ucelsanicin at yahoo dot com

--- Comment #13 from Ucel Sani <ucelsanicin at yahoo dot com> ---
On further thought, we shouldn't be encouraging palindromish REs in the manual,
so that naive users aren't drawn into this mess. So I installed the attached
further patch to the documentation.

Of course it would be better to fix the back-reference bugs but this is low
priority and I doubt whether anybody has the time.
[0001-doc-don-t-encourage-back-references.patch
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[Bug gdb/26876] gdb error: internal-error: Unknown CFA rule when debugging the linux kernel with qemu

[mark at klomp dot org]

https://sourceware.org/bugzilla/show_bug.cgi?id=26876

Mark Wielaard <mark at klomp dot org> changed:

           What    |Removed                     |Added
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                 CC|                            |mark at klomp dot org

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[Bug gdb/26876] gdb error: internal-error: Unknown CFA rule when debugging the linux kernel with qemu

[ribevi6798 at enamelme dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=26876

ribevi <ribevi6798 at enamelme dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |ribevi6798 at enamelme dot com

--- Comment #14 from ribevi <ribevi6798 at enamelme dot com> ---
You know your projects stand out of the herd. There is something special about
them. It seems to me all of them are really brilliant!
https://www.introverts.org
https://imedenver.com/
https://www.efinancialmodels.com/

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[Bug gdb/26876] gdb error: internal-error: Unknown CFA rule when debugging the linux kernel with qemu

[vincent at bernat dot im]

https://sourceware.org/bugzilla/show_bug.cgi?id=26876

Vincent Bernat <vincent at bernat dot im> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |vincent at bernat dot im

--- Comment #15 from Vincent Bernat <vincent at bernat dot im> ---
I am running into the same bug with 10.2. I am running gdb from Nix:

```
gdb$  show version
GNU gdb (GDB) 10.2
Copyright (C) 2021 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
Type "show copying" and "show warranty" for details.
This GDB was configured as "x86_64-unknown-linux-gnu".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<https://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
    <http://www.gnu.org/software/gdb/documentation/>.

For help, type "help".
Type "apropos word" to search for commands related to "word".
gdb$  show configuration
This GDB was configured as follows:
   configure --host=x86_64-unknown-linux-gnu --target=x86_64-unknown-linux-gnu
             --with-auto-load-dir=$debugdir:$datadir/auto-load
            
--with-auto-load-safe-path=$debugdir:$datadir/auto-load:/nix/store/0kiykyrnrpfhmjwxwx89kxr20hmf5304-gcc-10.3.0-lib
             --with-expat
            
--with-gdb-datadir=/nix/store/wx014fbhv8ssxbn076skz4rwn55qcgpd-gdb-10.2/share/gdb
(relocatable)
            
--with-jit-reader-dir=/nix/store/wx014fbhv8ssxbn076skz4rwn55qcgpd-gdb-10.2/lib/gdb
(relocatable)
             --without-libunwind-ia64
             --without-lzma
             --without-babeltrace
             --with-intel-pt
             --with-mpfr
             --without-xxhash
            
--with-python=/nix/store/nki9ywqzbvz68vr75kn2r7g1q84f5agy-python3-3.9.6
            
--with-python-libdir=/nix/store/nki9ywqzbvz68vr75kn2r7g1q84f5agy-python3-3.9.6/lib
             --without-debuginfod
             --without-guile
             --disable-source-highlight
            
--with-separate-debug-dir=/nix/store/wx014fbhv8ssxbn076skz4rwn55qcgpd-gdb-10.2/lib/debug
(relocatable)

("Relocatable" means the directory can be moved with the GDB installation
tree, and GDB will still find it.)
```

And I am running QEMU 6.1:

```
 22:46 ❱ qemu-system-x86_64 --version
QEMU emulator version 6.1.0 (Debian 1:6.1+dfsg-1)
Copyright (c) 2003-2021 Fabrice Bellard and the QEMU Project developers
```

Also when running `lx-symbols`:

```
gdb$  lx-symbols
loading vmlinux
../../gdb/dwarf2/frame.c:1085: internal-error: Unknown CFA rule.
A problem internal to GDB has been detected,
```

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[Bug gdb/26876] gdb error: internal-error: Unknown CFA rule when debugging the linux kernel with qemu

[josef.grieb at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=26876

Josef <josef.grieb at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |josef.grieb at gmail dot com

--- Comment #16 from Josef <josef.grieb at gmail dot com> ---
it seems that the commit 0bc2e38dd71e24676e180b6b37e0a2cd1186994d (gdb: fix
logic of find_comp_unit and set_comp_unit) ended up in the gdb-11-branch
branch, not in 10.2 release, I'm just wondering why there is the bug listed in
the 10.2 release notes(https://www.gnu.org/software/gdb/)

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[Bug gdb/26876] gdb error: internal-error: Unknown CFA rule when debugging the linux kernel with qemu

[donipah907 at mtlcz dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=26876

james rohan <donipah907 at mtlcz dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |donipah907 at mtlcz dot com

--- Comment #17 from james rohan <donipah907 at mtlcz dot com> ---
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http://nandangreens.com/
http://techstake.org/
http://bloglifetime.com/

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[Bug gdb/26876] gdb error: internal-error: Unknown CFA rule when debugging the linux kernel with qemu

[simark at simark dot ca]

https://sourceware.org/bugzilla/show_bug.cgi?id=26876

--- Comment #18 from Simon Marchi <simark at simark dot ca> ---
(In reply to Josef from comment #16)
> it seems that the commit 0bc2e38dd71e24676e180b6b37e0a2cd1186994d (gdb: fix
> logic of find_comp_unit and set_comp_unit) ended up in the gdb-11-branch
> branch, not in 10.2 release, I'm just wondering why there is the bug listed
> in the 10.2 release notes(https://www.gnu.org/software/gdb/)

There won't be another 10.x release, that's why the commit wasn't cherry-picked
on the gdb-10-branch branch.  But if you want to build your own GDB, you can
always cherry-pick it yourself.

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[Bug gdb/26876] gdb error: internal-error: Unknown CFA rule when debugging the linux kernel with qemu

[kimolsun2020 at yahoo dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=26876

Kim Olsun <kimolsun2020 at yahoo dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |kimolsun2020 at yahoo dot com

--- Comment #19 from Kim Olsun <kimolsun2020 at yahoo dot com> ---
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[Bug gdb/26876] gdb error: internal-error: Unknown CFA rule when debugging the linux kernel with qemu

[focixujo at livinginsurance dot co.uk]

https://sourceware.org/bugzilla/show_bug.cgi?id=26876

james robin <focixujo at livinginsurance dot co.uk> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |focixujo at livinginsurance dot co
                   |                            |.uk

--- Comment #20 from james robin <focixujo at livinginsurance dot co.uk> ---
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[Bug gdb/26876] gdb error: internal-error: Unknown CFA rule when debugging the linux kernel with qemu

[mehmetgelisin at aol dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=26876

Mehmet gelisin <mehmetgelisin at aol dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |mehmetgelisin at aol dot com

--- Comment #21 from Mehmet gelisin <mehmetgelisin at aol dot com> ---
./../gdb/arch/arc.c:117:43:   required from here
/usr/include/c++/4.8.2/bits/hashtable_policy.h:195:39: error: no matching
function for call to ‘std::pair<const arc_arch_features, const
http://www-look-4.com/std::unique_ptr<target_desc, target_desc_deleter>
>::pair(const arc_arch_features&, target_desc*&)’
  : _M_v(std::forward<_Args>(__args)...) { } http://www.compilatori.com/
                                       ^
/usr/include/c++/4.8.2/bits/hashtable_policy.h:195:39: note: candidates are:
http://www.wearelondonmade.com/
In file included from /usr/include/c++/4.8.2/utility:70:0,
                 from /usr/include/c++/4.8.2/tuple:38,
                 from /usr/include/c++/4.8.2/functional:55,
http://www.jopspeech.com/
                 from ../../gdb/../gdbsupport/ptid.h:35,
                 from ../../gdb/../gdbsupport/common-defs.h:123,
http://joerg.li/
                 from ../../gdb/arch/arc.c:19:
/usr/include/c++/4.8.2/bits/stl_pair.h:206:9: note: template<class
http://connstr.net/  ... _Args1, long unsigned int ..._Indexes1, class ...
_Args2, long unsigned int ..._Indexes2> std::pair<_T1,
_T2>::pair(std::tuple<_Args1 ...>&, http://embermanchester.uk/ 
std::tuple<_Args2 ...>&,  std::_Index_tuple<_Indexes1 ...>,
std::_Index_tuple<_Indexes2 ...>) http://www.slipstone.co.uk/ 
         pair(tuple<_Args1...>&, tuple<_Args2...>&,
         ^
-------->8---------
 http://www.logoarts.co.uk/ 
Thanks to Tome de Vries' investigation, same fix applies in ARC's case as well:
--------8<---------
diff --git a/gdb/arch/arc.c b/gdb/arch/arc.c
index 3808f9f..a5385ce 100644
--- a/gdb/arch/arc.c
+++ b/gdb/arch/arc.c http://www.acpirateradio.co.uk/ 
@@ -114,7 +114,7 @@ struct arc_arch_features_hasher
   target_desc *tdesc = arc_create_target_description (features);

   /* Add the newly created target description to the repertoire.  */
-  arc_tdesc_cache.emplace (features, tdesc); https://waytowhatsnext.com/ 

When I execute "lx-symbols", I get the error mentioned in the header.

I'm using GNU gdb (GDB) 10.1 https://www.webb-dev.co.uk/  on archlinux with gcc
version 10.2.0 (GCC) and QEMU emulator version 5.1.0

I have attached the kernel config. The binary exceeds the upload limit. I can
provide it upon request.
The kernel is based on commit: 9ff9b0d392ea08090cd1780fb196f36dbb586529

Here's the exact output of my gdb debugging session:
http://www.iu-bloomington.com/ 
When I execute "lx-symbols", I get the error mentioned in the header.

I'm using GNU gdb (GDB) 10.1 on archlinux with gcc version 10.2.0 (GCC) and
QEMU emulator version 5.1.0

I have attached the kernel config. The binary exceeds the upload limit. I can
provide it upon request.
The kernel is based on commit: 9ff9b0d392ea08090cd1780fb196f36dbb586529

Here's the exact output of my gdb debugging session: https://komiya-dental.com/

[I] ~/S/R/S/linux (master|…) $ gdb vmlinux                                     
GNU gdb (GDB) 10.1  

When I execute "lx-symbols", I get the error mentioned in the header.

I'm using GNU gdb (GDB) 10.1 on archlinux with gcc version 10.2.0 (GCC) and
QEMU emulator version 5.1.0

I have attached the kernel config. The binary exceeds the upload limit. I can
provide it upon request.
The kernel is based on commit: 9ff9b0d392ea08090cd1780fb196f36dbb586529

Here's the exact output of my gdb debugging session:

[I] ~/S/R/S/linux (master|…) $ gdb vmlinux                                     
GNU gdb (GDB) 10.1  

[I] ~/S/R/S/linux (master|…) $ gdb vmlinux

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[Bug gdb/26876] gdb error: internal-error: Unknown CFA rule when debugging the linux kernel with qemu

[tes.vik1986 at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=26876

Kylan <tes.vik1986 at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |tes.vik1986 at gmail dot com

--- Comment #22 from Kylan <tes.vik1986 at gmail dot com> ---
amd64-linux-siginfo.c: Adjust include order to avoid gnulib error

    On Fedora rawhide, after updating to glibc-2.33, I'm seeing the
    following build failure: https://komiya-dental.com/crypto/new-coins/

      CXX    nat/amd64-linux-siginfo.o
http://www-look-4.com/property/houses-in-france/
    In file included from /usr/include/bits/sigstksz.h:24,
                     from /usr/include/signal.h:315,
http://www.iu-bloomington.com/property/properties-in-turkey/
                     from ../gnulib/import/signal.h:52,
                     from
/ironwood1/sourceware-git/rawhide-gnulib/bld/../../worktree-gnulib/gdbserver/../gdb/nat/amd64-linux-siginfo.c:20:
https://www.webb-dev.co.uk/services/vaccine-services/
    ../gnulib/import/unistd.h:663:3: error: #error "Please include config.h
first." https://waytowhatsnext.com/shopping/xbox-release-date/
      663 |  #error "Please include config.h first." 
          |   ^~~~~ http://www.acpirateradio.co.uk/technology/global-warming/

    glibc-2.33 has changed signal.h to now include <bits/sigstksz.h> which,
http://www.logoarts.co.uk/travel/actions-camera/
    in turn, includes <unistd.h>. For a gdb build, this causes the gnulib
http://www.slipstone.co.uk/category/technology/
    version of unistd.h to be pulled in first.  The build failure shown
http://embermanchester.uk/computers/video-conversation/
    above happens because gnulib's config.h has not been included before
    the include of <signal.h>. http://connstr.net/health/usb-chargers/

    The fix is simple - we just rearrange the order of the header file
http://joerg.li/services/kia-rio-price/
    includes to make sure that gdbsupport/commondefs.h is included before
    attempting to include signal.h.  Note that gdbsupport/commondefs.h
http://www.jopspeech.com/technology/thunderbolt-4/
    includes <gnulib/config.h>.

    Build and regression tested on Fedora 33.  On Fedora rawhide, GDB
http://www.wearelondonmade.com/technology/van-technology/
    builds again. amd64-linux-siginfo.c: Adjust include order to avoid gnulib
error
     http://www.compilatori.com/technology/download-videos/
    On Fedora rawhide, after updating to glibc-2.33, I'm seeing the
    following build failure:

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[Bug gdb/26876] gdb error: internal-error: Unknown CFA rule when debugging the linux kernel with qemu

[vficaj at ukr dot net]

https://sourceware.org/bugzilla/show_bug.cgi?id=26876

vficaj at ukr dot net changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |vficaj at ukr dot net

--- Comment #23 from vficaj at ukr dot net ---
http://www.tremulous.net.ru/archives/19750
http://www.tremulous.net.ru/archives/19749
http://www.tremulous.net.ru/archives/19087
http://www.tremulous.net.ru/archives/18343
http://www.tremulous.net.ru/archives/19372
http://www.tremulous.net.ru/archives/18337
http://www.tremulous.net.ru/archives/19069
http://www.tremulous.net.ru/archives/18335
http://www.tremulous.net.ru/archives/20345
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http://www.tremulous.net.ru/archives/19371
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http://www.tremulous.net.ru/archives/20344
http://www.tremulous.net.ru/archives/19369
http://www.tremulous.net.ru/archives/18319
http://www.tremulous.net.ru/archives/19712
http://www.tremulous.net.ru/archives/19711
http://www.tremulous.net.ru/archives/18833
http://www.tremulous.net.ru/archives/18825
http://www.tremulous.net.ru/archives/18823
http://www.tremulous.net.ru/archives/19747
http://www.tremulous.net.ru/archives/18818
http://www.tremulous.net.ru/archives/18810
http://www.tremulous.net.ru/archives/18806
http://www.tremulous.net.ru/archives/18315
http://www.tremulous.net.ru/archives/19710
http://www.tremulous.net.ru/archives/19817
http://www.tremulous.net.ru/archives/18313
http://www.tremulous.net.ru/archives/20343
http://www.tremulous.net.ru/archives/19031
http://www.tremulous.net.ru/archives/19030
http://www.tremulous.net.ru/archives/18575
http://www.tremulous.net.ru/archives/20342
http://www.tremulous.net.ru/archives/20341
http://www.tremulous.net.ru/archives/17622
http://www.tremulous.net.ru/archives/17620

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[Bug gdb/26876] gdb error: internal-error: Unknown CFA rule when debugging the linux kernel with qemu

[gulsenenginar at aol dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=26876

Gulsen Engin <gulsenenginar at aol dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |gulsenenginar at aol dot com

--- Comment #24 from Gulsen Engin <gulsenenginar at aol dot com> ---
#0  0x000055befa524260 in execute_cfa_program (fde=0x621000f84c90,
http://www-look-4.com/technology/peugeot-208/ insn_ptr=0x7fab8d86da86 <error:
Cannot access memory at address 0x7fab8d86da86>, insn_end=0x7fab8d86da90
<error: Cannot access memory at address 0x7fab8d86da90>,
gdbarch=0x621000be3d10, https://komiya-dental.com/computers/huawei-technology/
pc=0xffffffff81b3318e, fs=0x7ffe0a288d10, text_offset=0x0) at
/home/smarchi/src/binutils-gdb/gdb/dwarf2/frame.c:367
http://www.iu-bloomington.com/crypto/china-affect-on-crypto/ 
#1  0x000055befa52bf02 in dwarf2_frame_cache (this_frame=0x6210006cfde0,
this_cache=0x6210006cfdf8)
https://waytowhatsnext.com/crypto/cryptocurrency-taxes/ at
/home/smarchi/src/binutils-gdb/gdb/dwarf2/frame.c:1025
#2  0x000055befa52ea38 in dwarf2_frame_this_id (this_frame=0x6210006cfde0,
http://www.wearelondonmade.com/services/car-repair-services/ 
this_cache=0x6210006cfdf8, this_id=0x6210006cfe40) at
/home/smarchi/src/binutils-gdb/gdb/dwarf2/frame.c:1226
http://www.jopspeech.com/property/slim-pen-2/
#3  0x000055befa8dde95 in compute_frame_id (fi=0x6210006cfde0) at
/home/smarchi/src/binutils-gdb/gdb/frame.c:588
http://joerg.li/tech/cars-comparison/
#4  0x000055befa8de53e in get_frame_id (fi=0x6210006cfde0) at
/home/smarchi/src/binutils-gdb/gdb/frame.c:636
http://connstr.net/tech/mars-surface/
#5  0x000055befa8ecf33 in get_prev_frame (this_frame=0x6210006cfde0) at
/home/smarchi/src/binutils-gdb/gdb/frame.c:2504
http://embermanchester.uk/property/chat-themes/
#6  0x000055befb1ff582 in frame_info_to_frame_object (frame=0x6210006cfde0) at
/home/smarchi/src/binutils-gdb/gdb/python/py-frame.c:364
http://www.slipstone.co.uk/computers/isofix/ 
#7  0x000055befb201016 in gdbpy_newest_frame (self=0x7fabbcb11a40, args=0x0) at
/home/smarchi/src/binutils-gdb/gdb/python/py-frame.c:599
#8  0x00007fabc25f01aa in cfunction_vectorcall_NOARGS (func=0x7fabbca78d60,
args=<optimized out>, nargsf=<optimized out>, kwnames=<optimized out>) at
../Objects/methodobject.c:459 http://www.logoarts.co.uk/tech/drone-cameras/
#9  0x00007fabc2405d6d in _PyObject_Vectorcall (kwnames=<optimized out>,
nargsf=<optimized out>, args=<optimized out>, callable=<optimized out>) at
../Include/cpython/abstract.h:127
http://www.acpirateradio.co.uk/property/applications/ 
#10 call_function (tstate=0x612000009940, pp_stack=0x7ffe0a289370,
oparg=<optimized out>, kwnames=0x0) at ../Python/ceval.c:4963
http://www.compilatori.com/health/premium-subscription/
#11 0x00007fabc240def6 in _PyEval_EvalFrameDefault (f=<optimized out>,
throwflag=<optimized out>) at ../Python/ceval.c:3469
https://www.webb-dev.co.uk/shopping/shopping-during-corona/ 
#12 0x00007fabc241106b in function_code_fastcall (co=<optimized out>,
args=<optimized out>, nargs=1, globals=<optimized out>) at
../Objects/call.c:283


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[Bug gdb/26876] gdb error: internal-error: Unknown CFA rule when debugging the linux kernel with qemu

[ahmedsayeed1982 at hotmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=26876

Canerkin <ahmedsayeed1982 at hotmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |ahmedsayeed1982 at hotmail dot com

--- Comment #25 from Canerkin <ahmedsayeed1982 at hotmail dot com> ---
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I have attached the kernel config. The binary exceeds the upload limit. I can
provide it upon request.
The kernel is based on commit: 9ff9b0d392ea08090cd1780fb196f36dbb586529

Here's the exact output of my gdb debugging session:


http://vitox-2ch.xyz/
I have attached the kernel config. The binary exceeds the upload limit. I can
provide it upon request.
The kernel is based on commit: 9ff9b0d392ea08090cd1780fb196f36dbb586529

Here's the exact output of my gdb debugging session:

http://vloerverwarming.xyz/
I have attached the kernel config. The binary exceeds the upload limit. I can
provide it upon request.
The kernel is based on commit: 9ff9b0d392ea08090cd1780fb196f36dbb586529

Here's the exact output of my gdb debugging session:

http://koffieautomaat.xyz/
I have attached the kernel config. The binary exceeds the upload limit. I can
provide it upon request.
The kernel is based on commit: 9ff9b0d392ea08090cd1780fb196f36dbb586529

Here's the exact output of my gdb debugging session:

http://motherlode.store/
I have attached the kernel config. The binary exceeds the upload limit. I can
provide it upon request.
The kernel is based on commit: 9ff9b0d392ea08090cd1780fb196f36dbb586529

Here's the exact output of my gdb debugging session:

http://yamaro-everyfish.store/
I have attached the kernel config. The binary exceeds the upload limit. I can
provide it upon request.
The kernel is based on commit: 9ff9b0d392ea08090cd1780fb196f36dbb586529

Here's the exact output of my gdb debugging session:

http://ipatovo.store/
I have attached the kernel config. The binary exceeds the upload limit. I can
provide it upon request.
The kernel is based on commit: 9ff9b0d392ea08090cd1780fb196f36dbb586529

Here's the exact output of my gdb debugging session:

http://tinguely.site/
I have attached the kernel config. The binary exceeds the upload limit. I can
provide it upon request.
The kernel is based on commit: 9ff9b0d392ea08090cd1780fb196f36dbb586529

Here's the exact output of my gdb debugging session:

http://wasillahomes.website/
I have attached the kernel config. The binary exceeds the upload limit. I can
provide it upon request.
The kernel is based on commit: 9ff9b0d392ea08090cd1780fb196f36dbb586529

Here's the exact output of my gdb debugging session:

http://ruirui.store/
I have attached the kernel config. The binary exceeds the upload limit. I can
provide it upon request.
The kernel is based on commit: 9ff9b0d392ea08090cd1780fb196f36dbb586529

Here's the exact output of my gdb debugging session:

http://www.foamhands.store/
I have attached the kernel config. The binary exceeds the upload limit. I can
provide it upon request.
The kernel is based on commit: 9ff9b0d392ea08090cd1780fb196f36dbb586529

Here's the exact output of my gdb debugging session:

http://www.i-obchody.info/
I have attached the kernel config. The binary exceeds the upload limit. I can
provide it upon request.
The kernel is based on commit: 9ff9b0d392ea08090cd1780fb196f36dbb586529

Here's the exact output of my gdb debugging session:

http://freixenet.site/influencerprogramme/
I have attached the kernel config. The binary exceeds the upload limit. I can
provide it upon request.
The kernel is based on commit: 9ff9b0d392ea08090cd1780fb196f36dbb586529

Here's the exact output of my gdb debugging session:

https://www.hlungomare.store/      
I have attached the kernel config. The binary exceeds the upload limit. I can
provide it upon request.
The kernel is based on commit: 9ff9b0d392ea08090cd1780fb196f36dbb586529

Here's the exact output of my gdb debugging session:

https://www.lungomarebikehotel.store/
I have attached the kernel config. The binary exceeds the upload limit. I can
provide it upon request.
The kernel is based on commit: 9ff9b0d392ea08090cd1780fb196f36dbb586529

Here's the exact output of my gdb debugging session:

https://www.arborconsult.space/
I have attached the kernel config. The binary exceeds the upload limit. I can
provide it upon request.
The kernel is based on commit: 9ff9b0d392ea08090cd1780fb196f36dbb586529

Here's the exact output of my gdb debugging session:

http://fishingnewsletters.co.uk/mail/
I have attached the kernel config. The binary exceeds the upload limit. I can
provide it upon request.
The kernel is based on commit: 9ff9b0d392ea08090cd1780fb196f36dbb586529

Here's the exact output of my gdb debugging session:

http://www.go-mk-websites.co.uk/
I have attached the kernel config. The binary exceeds the upload limit. I can
provide it upon request.
The kernel is based on commit: 9ff9b0d392ea08090cd1780fb196f36dbb586529

Here's the exact output of my gdb debugging session:

http://www.mconstantine.co.uk/
I have attached the kernel config. The binary exceeds the upload limit. I can
provide it upon request.
The kernel is based on commit: 9ff9b0d392ea08090cd1780fb196f36dbb586529

Here's the exact output of my gdb debugging session:

http://the-hunters.org/

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[Bug gdb/26876] gdb error: internal-error: Unknown CFA rule when debugging the linux kernel with qemu

[progonsaytu at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=26876

progonsaytu <progonsaytu at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |progonsaytu at gmail dot com

--- Comment #26 from progonsaytu <progonsaytu at gmail dot com> ---
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[Bug gdb/26876] gdb error: internal-error: Unknown CFA rule when debugging the linux kernel with qemu

[fiteva5725 at bomoads dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=26876

fiteva <fiteva5725 at bomoads dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |fiteva5725 at bomoads dot com

--- Comment #27 from fiteva <fiteva5725 at bomoads dot com> ---
This is actually the kind of information I have been trying to find. Thank you
for writing this information.
https://www.neuzeitwerber.de/

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[Bug gdb/26876] gdb error: internal-error: Unknown CFA rule when debugging the linux kernel with qemu

[glassmtech at ukr dot net]

https://sourceware.org/bugzilla/show_bug.cgi?id=26876

glassmtech <glassmtech at ukr dot net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |glassmtech at ukr dot net

--- Comment #28 from glassmtech <glassmtech at ukr dot net> ---
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[Bug gdb/26876] gdb error: internal-error: Unknown CFA rule when debugging the linux kernel with qemu

[paneki8601 at dukeoo dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=26876

paneki <paneki8601 at dukeoo dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |paneki8601 at dukeoo dot com

--- Comment #29 from paneki <paneki8601 at dukeoo dot com> ---
If you set out to make me think today; mission accomplished!  I really like
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[Bug gdb/26876] gdb error: internal-error: Unknown CFA rule when debugging the linux kernel with qemu

[tesaso8237 at funboxcn dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=26876

tesaso8237 at funboxcn dot com <tesaso8237 at funboxcn dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |tesaso8237 at funboxcn dot com

--- Comment #30 from tesaso8237 at funboxcn dot com <tesaso8237 at funboxcn dot com> ---
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[Bug gdb/26876] gdb error: internal-error: Unknown CFA rule when debugging the linux kernel with qemu

[xecana8007 at funboxcn dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=26876

tesaso8237 at funboxcn dot comxecana8007@funboxcn.com <xecana8007 at funboxcn dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |xecana8007 at funboxcn dot com

--- Comment #31 from tesaso8237 at funboxcn dot comxecana8007@funboxcn.com <xecana8007 at funboxcn dot com> ---
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[Bug gdb/26876] gdb error: internal-error: Unknown CFA rule when debugging the linux kernel with qemu

[xecana8007 at funboxcn dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=26876

--- Comment #32 from tesaso8237 at funboxcn dot comxecana8007@funboxcn.com <xecana8007 at funboxcn dot com> ---
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[Bug gdb/26876] gdb error: internal-error: Unknown CFA rule when debugging the linux kernel with qemu

[xecana8007 at funboxcn dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=26876

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[Bug gdb/26876] gdb error: internal-error: Unknown CFA rule when debugging the linux kernel with qemu

[xecana8007 at funboxcn dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=26876

--- Comment #34 from tesaso8237 at funboxcn dot comxecana8007@funboxcn.com <xecana8007 at funboxcn dot com> ---
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[Bug gdb/26876] gdb error: internal-error: Unknown CFA rule when debugging the linux kernel with qemu

[vincent at bernat dot im]

https://sourceware.org/bugzilla/show_bug.cgi?id=26876

Vincent Bernat <vincent at bernat dot im> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|vincent at bernat dot im           |

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[Bug gdb/26876] gdb error: internal-error: Unknown CFA rule when debugging the linux kernel with qemu

[gexed96894 at keagenan dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=26876

gexed96894 <gexed96894 at keagenan dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |gexed96894 at keagenan dot com

--- Comment #35 from gexed96894 <gexed96894 at keagenan dot com> ---
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