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Annotation of wikisrc/users/leot/aarch64_problems.mdwn, revision 1.2

1.1       leot        1: # Various (possible) problems of aarch64
                      2: 
                      3: Here a list of possible problems of NetBSD/evbarm aarch64 that needs further
                      4: investigation in order to write proper PR or better yet to fix them!
                      5: 
                      6: 
                      7: ## `usbhidctl` and NetBSD crashes on Pinebook
                      8: 
                      9: At least by running:
                     10: 
1.2     ! leot       11:     # usbhidctl -f uhid4 -r
1.1       leot       12: 
                     13: it is possible to crash the Pinebook. Investigate why and if possible get a
                     14: complete backtrace.
                     15: 
                     16: 
                     17: ## `mpv` and NetBSD crashes
                     18: Just by invoking `mpv` via:
                     19: 
1.2     ! leot       20:     $ mpv
1.1       leot       21: 
                     22: It is possible to completely crash NetBSD on aarch64. Investigate why and if
                     23: possible get a complete backtrace.
                     24: 
                     25: (Is it PaX MPROTECT related?)
                     26: 
                     27: 
                     28: ## Python `import requests` SIGILLs
                     29: Doing a (please note that also `python36` is affected):
                     30: 
1.2     ! leot       31:     $ python2.7 -c 'import requests'
        !            32:     Illegal instruction (core dumped)
        !            33:     Exit 132
1.1       leot       34: 
                     35: leads to a SIGILL. Trying to reduce the test case this also happens with just a:
                     36: 
1.2     ! leot       37:     $ python2.7 -c 'import OpenSSL'
        !            38:     Illegal instruction (core dumped)
        !            39:     Exit 132
1.1       leot       40: 
                     41: Trying to debug this a bit further we can see:
                     42: 
1.2     ! leot       43:     % cat asi.py
        !            44:     import OpenSSL
        !            45:     % python2.7 -m trace --trace asi.py
        !            46:     [...]
        !            47:     binding.py(88):     for attr in dir(lib):
        !            48:     binding.py(89):         if attr not in excluded_names:
        !            49:     binding.py(90):             setattr(conditional_lib, attr, getattr(lib, attr))
        !            50:     binding.py(88):     for attr in dir(lib):
        !            51:     binding.py(89):         if attr not in excluded_names:
        !            52:     binding.py(90):             setattr(conditional_lib, attr, getattr(lib, attr))
        !            53:     binding.py(88):     for attr in dir(lib):
        !            54:     binding.py(89):         if attr not in excluded_names:
        !            55:     binding.py(90):             setattr(conditional_lib, attr, getattr(lib, attr))
        !            56:     binding.py(88):     for attr in dir(lib):
        !            57:     binding.py(92):     return conditional_lib
        !            58:     binding.py(126):                 cls._lib_loaded = True
        !            59:     binding.py(128):                 cls.lib.SSL_library_init()
        !            60:     Illegal instruction (core dumped)
        !            61:     Exit 132