wikisrc/users/leot/aarch64_problems.mdwn - view

File: [NetBSD Developer Wiki] / wikisrc / users / leot / aarch64_problems.mdwn
Revision 1.8: download - view: text, annotated - select for diffs
Tue Jul 24 00:09:53 2018 UTC (5 years, 2 months ago) by wiki
Branches: MAIN
CVS tags: HEAD

web commit by jmcneill: add polkitd crash

# Various (possible) problems of aarch64 Here a list of possible problems of NetBSD/evbarm aarch64 that needs further investigation in order to write proper PR or better yet to fix them! ## `mpv` and NetBSD crashes Just by invoking `mpv` via: $ mpv It is possible to completely crash NetBSD on aarch64. Investigate why and if possible get a complete backtrace. (Is it PaX MPROTECT related?) ## Python `import requests` SIGILLs Doing a (please note that also `python36` is affected): $ 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