hook_MGCopyAnswer.dylib cause APP "Preferences" crash

[sugarocrean]

Platform: 6plus
ios: 10.2
Jailbreak: yalu102

steps:

1. build hook_MGCopyAnswer.dylib with ios9 sdk
2. ldid -S hook_MGCopyAnswer.dylib
3. copy to 6P's directory:/Library/MobileSubstrate/DynamicLibraries
4. Launch Preferences app, Click 'General' -> "About", then Preferences crashed

bt:
Process 5074 stopped

• thread longjmp可以换成asm_exit？ #9, queue = 'com.apple.root.default-qos', stop reason = signal SIGABRT
  frame #0: 0x0000000189479d74 libsystem_kernel.dylib__abort_with_payload + 8 libsystem_kernel.dylib__abort_with_payload:
  -> 0x189479d74 <+8>: b.lo 0x189479d8c ; <+32>
  0x189479d78 <+12>: stp x29, x30, [sp, #-0x10]!
  0x189479d7c <+16>: mov x29, sp
  0x189479d80 <+20>: bl 0x18945e7d0 ; cerror_nocancel
  (lldb) bt
• thread longjmp可以换成asm_exit？ #9, queue = 'com.apple.root.default-qos', stop reason = signal SIGABRT
  • frame #0: 0x0000000189479d74 libsystem_kernel.dylib__abort_with_payload + 8 frame #1: 0x00000001894764c8 libsystem_kernel.dylibabort_with_payload + 12
    frame hook_MGCopyAnswer.dylib cause APP "Preferences" crash #2: 0x000000018c6ea328 TCC<redacted> + 260 frame #3: 0x000000018c6ea224 TCC + 704
    frame How can I using #4: 0x000000018c6ed330 TCC<redacted> + 348 frame #5: 0x000000018957efcc libxpc.dylib + 80
    frame #6: 0x000000018957ef3c libxpc.dylib<redacted> + 40 frame #7: 0x00000001893361bc libdispatch.dylib + 16
    frame Register status is not restored #8: 0x0000000189344a4c libdispatch.dylib<redacted> + 732 frame #9: 0x000000018934634c libdispatch.dylib + 572
    frame 指令传参的顺序影响寄存器使用？求解答 #10: 0x00000001893460ac libdispatch.dylib<redacted> + 124 frame #11: 0x000000018953f2a0 libsystem_pthread.dylib_pthread_wqthread + 1288
    (lldb) q

[jmpews]

ok, i will try it tomorrow.