--- wikisrc/users/leot/aarch64_problems.mdwn	2018/06/18 12:30:36	1.1
+++ wikisrc/users/leot/aarch64_problems.mdwn	2018/07/28 19:14:29	1.9
@@ -4,68 +4,248 @@ Here a list of possible problems of NetB
 investigation in order to write proper PR or better yet to fix them!
 
 
-## `usbhidctl` and NetBSD crashes on Pinebook
-
-At least by running:
-
-````
-# usbhidctl -f uhid4 -r
-````
-
-it is possible to crash the Pinebook. Investigate why and if possible get a
-complete backtrace.
-
-
 ## `mpv` and NetBSD crashes
 Just by invoking `mpv` via:
 
-````
-$ mpv
-````
+    % mpv
 
-It is possible to completely crash NetBSD on aarch64. Investigate why and if
-possible get a complete backtrace.
+It SEGV as follows:
 
-(Is it PaX MPROTECT related?)
+    % mpv
+    /usr/pkg/lib/ffmpeg4/libavcodec.so.58: text relocations
+    mpv 0.29.0 Copyright © 2000-2018 mpv/MPlayer/mplayer2 projects
+     built on Sat Jul 28 21:02:57 CEST 2018
+    ffmpeg library versions:
+       libavutil       56.14.100
+       libavcodec      58.18.100
+       libavformat     58.12.100
+       libswscale      5.1.100
+       libavfilter     7.16.100
+       libswresample   3.1.100
+    ffmpeg version: 4.0.2
+    
+    Usage:   mpv [options] [url|path/]filename
+    
+    Basic options:
+     --start=<time>    seek to given (percent, seconds, or hh:mm:ss) position
+     --no-audio        do not play sound
+     --no-video        do not play video
+     --fs              fullscreen playback
+     --sub-file=<file> specify subtitle file to use
+     --playlist=<file> specify playlist file
+    
+     --list-options    list all mpv options
+     --h=<string>      print options which contain the given string in their name
+    
+    [1]   Segmentation fault (core dumped) /usr/pkg/bin/mpv...
+    % gdb -core mpv.core /usr/pkg/bin/mpv
+    Reading symbols from /usr/pkg/bin/mpv...done.
+    [New process 5]
+    [New process 6]
+    [New process 4]
+    [New process 3]
+    [New process 2]
+    [New process 1]
+    Core was generated by `mpv'.
+    Program terminated with signal SIGSEGV, Segmentation fault.
+    #0  0x0000f96f727f40b0 in memcpy () from /usr/lib/libc.so.12
+    [Current thread is 1 (process 5)]
+    (gdb) bt
+    #0  0x0000f96f727f40b0 in memcpy () from /usr/lib/libc.so.12
+    #1  0x00000002001cba34 in __memcpy_ichk (len=18446744073709551615, src=0xf96f6e10fec0, dst=<optimized out>)
+        at /usr/include/ssp/string.h:82
+    #2  strndup_append_at (str=str@entry=0xf96f6f4ff348, at=0, append=0xf96f6e10fec0 "speed", append_len=<optimized out>,
+        append_len@entry=18446744073709551615) at ../ta/ta_utils.c:113
+    #3  0x00000002001cbea4 in ta_strdup_append_buffer (str=str@entry=0xf96f6f4ff348, a=<optimized out>) at ../ta/ta_utils.c:165
+    #4  0x00000002001cb7b8 in ta_talloc_strdup_append_buffer (s=<optimized out>, s@entry=0x0, a=<optimized out>) at ../ta/ta_talloc.c:31
+    #5  0x0000000200157eec in print_str_list (opt=<optimized out>, src=<optimized out>) at ../options/m_option.c:1477
+    #6  0x000000020015db90 in m_option_print (val_ptr=0xf96f6f4ff3c0, opt=0xf96f6f4ff430) at ../options/m_option.h:496
+    #7  m_property_do (log=0xf96f71045130, prop_list=0xf96f71081040, name=name@entry=0xf96f6e139218 "property-list",
+        action=action@entry=6, arg=arg@entry=0xf96f6f4ff598, ctx=ctx@entry=0xf96f71011040) at ../options/m_property.c:127
+    #8  0x000000020016f9f8 in mp_property_do_silent (name=0xf96f6e139218 "property-list", action=6, val=0xf96f6f4ff598, ctx=0xf96f71011040)
+        at ../player/command.c:4167
+    #9  0x0000000200171014 in mp_property_do (name=0xf96f6e139218 "property-list", action=action@entry=6, val=<optimized out>,
+        val@entry=0xf96f6f4ff5c8, ctx=0xf96f71011040) at ../player/command.c:4177
+    #10 0x00000002001637bc in getproperty_fn (arg=0xf96f6f4ff5d8, arg@entry=0xf96f6f4ff5e8) at ../player/client.c:1261
+    #11 0x00000002001655b0 in run_locked (fn_data=0xf96f6f4ff5e8, fn=0x200163648 <getproperty_fn>, ctx=0xf96f6f5071c0)
+        at ../player/client.c:1003
+    #12 mpv_get_property (ctx=0xf96f6f5071c0, name=name@entry=0xf96f6e139218 "property-list", format=format@entry=MPV_FORMAT_STRING,
+        data=data@entry=0xf96f6f4ff668) at ../player/client.c:1335
+    #13 0x0000000200179b4c in script_get_property (L=0xf96f6e103400) at ../player/lua.c:794
+    #14 0x0000f96f72b2cb80 in luaD_precall () from /usr/pkg/lib/liblua5.2.so.5
+    #15 0x0000f96f72b3877c in luaV_execute () from /usr/pkg/lib/liblua5.2.so.5
+    #16 0x0000f96f72b2cf04 in luaD_call () from /usr/pkg/lib/liblua5.2.so.5
+    #17 0x0000f96f72b28e40 in lua_callk () from /usr/pkg/lib/liblua5.2.so.5
+    #18 0x0000000200178270 in load_builtin (L=0xf96f6e103400) at ../player/lua.c:214
+    #19 0x0000f96f72b2cb80 in luaD_precall () from /usr/pkg/lib/liblua5.2.so.5
+    #20 0x0000f96f72b2cef8 in luaD_call () from /usr/pkg/lib/liblua5.2.so.5
+    #21 0x0000f96f72b28e40 in lua_callk () from /usr/pkg/lib/liblua5.2.so.5
+    #22 0x0000f96f72b43900 in ll_require () from /usr/pkg/lib/liblua5.2.so.5
+    #23 0x0000f96f72b2cb80 in luaD_precall () from /usr/pkg/lib/liblua5.2.so.5
+    ---Type <return> to continue, or q <return> to quit---
+    #24 0x0000f96f72b3877c in luaV_execute () from /usr/pkg/lib/liblua5.2.so.5
+    #25 0x0000f96f72b2cf04 in luaD_call () from /usr/pkg/lib/liblua5.2.so.5
+    #26 0x0000f96f72b28e40 in lua_callk () from /usr/pkg/lib/liblua5.2.so.5
+    #27 0x0000000200179524 in require (L=L@entry=0xf96f6e103400, name=name@entry=0xf96f6f503420 "@stats.lua") at ../player/lua.c:232
+    #28 0x000000020017963c in load_scripts (L=0xf96f6e103400) at ../player/lua.c:260
+    #29 0x0000f96f72b2cb80 in luaD_precall () from /usr/pkg/lib/liblua5.2.so.5
+    #30 0x0000f96f72b2cef8 in luaD_call () from /usr/pkg/lib/liblua5.2.so.5
+    #31 0x0000f96f72b2c4b8 in luaD_rawrunprotected () from /usr/pkg/lib/liblua5.2.so.5
+    #32 0x0000f96f72b2d19c in luaD_pcall () from /usr/pkg/lib/liblua5.2.so.5
+    #33 0x0000f96f72b28f14 in lua_pcallk () from /usr/pkg/lib/liblua5.2.so.5
+    #34 0x000000020017b020 in run_lua (L=0xf96f6e103400) at ../player/lua.c:354
+    #35 0x0000f96f72b2cb80 in luaD_precall () from /usr/pkg/lib/liblua5.2.so.5
+    #36 0x0000f96f72b2cef8 in luaD_call () from /usr/pkg/lib/liblua5.2.so.5
+    #37 0x0000f96f72b2c4b8 in luaD_rawrunprotected () from /usr/pkg/lib/liblua5.2.so.5
+    #38 0x0000f96f72b2d19c in luaD_pcall () from /usr/pkg/lib/liblua5.2.so.5
+    #39 0x0000f96f72b28f14 in lua_pcallk () from /usr/pkg/lib/liblua5.2.so.5
+    #40 0x000000020017b4c8 in mp_cpcall (func=0x20017abd0 <run_lua>, ud=0xf96f6e1010c0, L=0xf96f6e103400) at ../player/lua.c:99
+    #41 load_lua (client=<optimized out>, fname=0xf96f6f503420 "@stats.lua") at ../player/lua.c:387
+    #42 0x00000002001815c0 in script_thread (p=0xf96f6f5050c0) at ../player/scripting.c:95
+    #43 0x0000f96f743ec588 in pthread__create_tramp (cookie=0xf96f6f515000) at /usr/src/lib/libpthread/pthread.c:593
+    #44 0x0000f96f727385ec in _lwp_makecontext (u=0x0, start=0x0, arg=0x0, private=0xff00000014,
+        stack_base=0x1 <error: Cannot access memory at address 0x1>, stack_size=8589934592) at /usr/src/lib/libc/arch/aarch64/gen/_lwp.c:47
+    #45 0x0000f96f743df000 in ?? ()
+    #46 0x544a8f02d40034c1 in ?? ()
+    Backtrace stopped: previous frame identical to this frame (corrupt stack?)
 
 
 ## Python `import requests` SIGILLs
 Doing a (please note that also `python36` is affected):
 
-````
-$ python2.7 -c 'import requests'
-Illegal instruction (core dumped)
-Exit 132
-````
-
-leads to a SIGILL. Trying to reduce the test case this also happens with just a:
-
-````
-$ python2.7 -c 'import OpenSSL'
-Illegal instruction (core dumped)
-Exit 132
-````
-
-Trying to debug this a bit further we can see:
-
-````
-% cat asi.py
-import OpenSSL
-% python2.7 -m trace --trace asi.py
-[...]
-binding.py(88):     for attr in dir(lib):
-binding.py(89):         if attr not in excluded_names:
-binding.py(90):             setattr(conditional_lib, attr, getattr(lib, attr))
-binding.py(88):     for attr in dir(lib):
-binding.py(89):         if attr not in excluded_names:
-binding.py(90):             setattr(conditional_lib, attr, getattr(lib, attr))
-binding.py(88):     for attr in dir(lib):
-binding.py(89):         if attr not in excluded_names:
-binding.py(90):             setattr(conditional_lib, attr, getattr(lib, attr))
-binding.py(88):     for attr in dir(lib):
-binding.py(92):     return conditional_lib
-binding.py(126):                 cls._lib_loaded = True
-binding.py(128):                 cls.lib.SSL_library_init()
-Illegal instruction (core dumped)
-Exit 132
-````
+    $ python2.7 -c 'import requests'
+    Illegal instruction (core dumped)
+    Exit 132
+
+...where:
+
+    % gdb -core python2.7.core `which python2.7`
+    Reading symbols from /usr/pkg/bin/python2.7...(no debugging symbols found)...done.
+    [New process 1]
+    Core was generated by `python2.7'.
+    Program terminated with signal SIGILL, Illegal instruction.
+    #0  0x0000f42f5fd00000 in ?? ()
+    (gdb) bt 5
+    #0  0x0000f42f5fd00000 in ?? ()
+    #1  0x0000f42f5fd0a3d0 in restore_errno_only () at c/misc_thread_common.h:43
+    #2  0x0000f42f5fbf0f90 in _cffi_f_SSL_library_init (self=<optimized out>, noarg=<optimized out>)
+        at build/temp.netbsd-8.99.22-evbarm-2.7/_openssl.c:51839
+    #3  0x0000f42f617606ac in PyEval_EvalFrameEx () from /usr/pkg/lib/libpython2.7.so.1.0
+    #4  0x0000f42f6175e5c0 in PyEval_EvalCodeEx () from /usr/pkg/lib/libpython2.7.so.1.0
+    (More stack frames follow...)
+    (gdb) f 2
+    #2  0x0000f42f5fbf0f90 in _cffi_f_SSL_library_init (self=<optimized out>, noarg=<optimized out>)
+        at build/temp.netbsd-8.99.22-evbarm-2.7/_openssl.c:51839
+    warning: Source file is more recent than executable.
+    51839     _cffi_restore_errno();
+    (gdb) list
+    51834   _cffi_f_SSL_library_init(PyObject *self, PyObject *noarg)
+    51835   {
+    51836     int result;
+    51837
+    51838     Py_BEGIN_ALLOW_THREADS
+    51839     _cffi_restore_errno();
+    51840     { result = SSL_library_init(); }
+    51841     _cffi_save_errno();
+    51842     Py_END_ALLOW_THREADS
+    51843
+    (gdb) f 1
+    #1  0x0000f42f5fd0a3d0 in restore_errno_only () at c/misc_thread_common.h:43
+    43      static void restore_errno_only(void) { errno = cffi_saved_errno; }
+    (gdb) list
+    38         syntactically valid to use "__thread" with this C compiler. */
+    39      #ifdef USE__THREAD
+    40
+    41      static __thread int cffi_saved_errno = 0;
+    42      static void save_errno_only(void) { cffi_saved_errno = errno; }
+    43      static void restore_errno_only(void) { errno = cffi_saved_errno; }
+    44
+    45      #else
+    46
+    47      static void save_errno_only(void)
+    (gdb) disas
+    Dump of assembler code for function restore_errno_only:
+       0x0000f42f5fd0a3b0 <+0>:     str     x30, [sp, #-16]!
+       0x0000f42f5fd0a3b4 <+4>:     bl      0xf42f5fd075c0 <__errno@plt>
+       0x0000f42f5fd0a3b8 <+8>:     mov     x2, x0
+       0x0000f42f5fd0a3bc <+12>:    mrs     x1, tpidr_el0
+       0x0000f42f5fd0a3c0 <+16>:    adrp    x0, 0xf42f5fd34000
+       0x0000f42f5fd0a3c4 <+20>:    ldr     x3, [x0, #4088]
+       0x0000f42f5fd0a3c8 <+24>:    add     x0, x0, #0xff8
+       0x0000f42f5fd0a3cc <+28>:    blr     x3
+    => 0x0000f42f5fd0a3d0 <+32>:    ldr     w0, [x1, x0]
+       0x0000f42f5fd0a3d4 <+36>:    str     w0, [x2]
+       0x0000f42f5fd0a3d8 <+40>:    ldr     x30, [sp], #16
+       0x0000f42f5fd0a3dc <+44>:    ret
+    End of assembler dump.
+    (gdb) info reg
+    x0             0xf42f5fd34ff8   268484308324344
+    x1             0xf42f61875080   268484336898176
+    x2             0xf42f6186c848   268484336863304
+    x3             0xf42f5fd00000   268484308107264
+    x4             0xf42f5ff3c0b8   268484310450360
+    x5             0xf42f60000570   268484311254384
+    x6             0x65000000000000 28428972647776256
+    x7             0x65     101
+    x8             0xf42f6185e000   268484336803840
+    x9             0xf42f6185e668   268484336805480
+    x10            0xf42f6185e668   268484336805480
+    x11            0x1      1
+    x12            0x30     48
+    x13            0xffffff9264f0   281474969527536
+    x14            0x65     101
+    x15            0x3      3
+    x16            0xf42f615bd730   268484334049072
+    x17            0xf42f615ec2c8   268484334240456
+    x18            0xf42f615ca1a0   268484334100896
+    x19            0xf42f5fc9cea8   268484307701416
+    x20            0xf42f5fd9c3c0   268484308747200
+    x21            0xf42f61307090   268484331204752
+    x22            0xf42f5fcd38e8   268484307925224
+    x23            0xf42f5fcd10a0   268484307914912
+    x24            0xf42f5fb8c5a8   268484306585000
+    x25            0xf42f5fd9c3c0   268484308747200
+    x26            0xf42f5fbf0f70   268484306997104
+    x27            0xf42f5fdd467e   268484308977278
+    x28            0xf42f61307090   268484331204752
+    x29            0x0      0
+    x30            0xf42f5fd0a3d0   268484308149200
+    sp             0xffffff926760   0xffffff926760
+    pc             0xf42f5fd0a3d0   0xf42f5fd0a3d0 <restore_errno_only+32>
+    cpsr           0x60000000       [ EL=0 C Z ]
+    fpsr           0x3000000        50331648
+    fpcr           0x10     16
+    (gdb) quit
+
+...and `_cffi_restore_errno` and `_cffi_save_errno` are defined in
+`cffi/_cffi_include.h` as follows:
+
+    #define _cffi_restore_errno                                              \
+        ((void(*)(void))_cffi_exports[13])
+    #define _cffi_save_errno                                                 \
+        ((void(*)(void))_cffi_exports[14])
+
+The following patch workaround the issue:
+
+    $NetBSD: aarch64_problems.mdwn,v 1.8 2018/07/24 00:09:53 wiki Exp $
+    
+    Kludge for NetBSD/aarch64 SIGILL.
+    
+    --- setup.py.orig	2018-02-27 18:15:41.000000000 +0000
+    +++ setup.py
+    @@ -70,7 +70,7 @@ def ask_supports_thread():
+         ok = (sys.platform != 'win32' and
+               config.try_compile('__thread int some_threadlocal_variable_42;'))
+         if ok:
+    -        define_macros.append(('USE__THREAD', None))
+    +        pass
+         else:
+             ok1 = config.try_compile('int some_regular_variable_42;')
+             if not ok1:
+
+
+## polkitd crashes
+
+    pinebook# /usr/pkg/lib/polkit-1/polkitd
+    Successfully changed to user polkitd
+    Error loading /var/run/ConsoleKit/database: Error statting file /var/run/ConsoleKit/database: No such file or directory[1]   Segmentation fault      /usr/pkg/lib/polkit-1/polkitd