about l4_thread_ex_regs()

[Yu Neil]

hello:

  i execute the l4_thread_ex_regs(...) systemcall, then the stack been 
pushed 0x38 byte data (esp -0x38), what`s that ?

  most serious is

  if i execute the l4_thread_ex_regs( dest_thread_id, child,... )  
systemcall
  
  then the |child| running ,but if i execute l4_myself() in |child|, the 
return value is not equal to dest_thread_id, is that means i can`t specific 
the dest thread id or it`s unnecessary to spicify the dest thread id in the 
caller thread, but managed by |child| itself ?

Neil Yu

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