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GET_THREAD_AREA(2)         Linux Programmer's Manual        GET_THREAD_AREA(2)

       get_thread_area - get a thread-local storage (TLS) area

       #include <linux/unistd.h>
       #include <asm/ldt.h>

       int get_thread_area(struct user_desc *u_info);

       Note: There is no glibc wrapper for this system call; see NOTES.

       get_thread_area() returns an entry in the current thread's thread-local
       storage (TLS) array.  The index of the entry corresponds to  the  value
       of  u_info->entry_number,  passed  in  by the user.  If the value is in
       bounds, get_thread_area() copies the corresponding TLS entry  into  the
       area pointed to by u_info.

       get_thread_area()  returns  0 on success.  Otherwise, it returns -1 and
       sets errno appropriately.

       EFAULT u_info is an invalid pointer.

       EINVAL u_info->entry_number is out of bounds.

       A version of get_thread_area() first appeared in Linux 2.5.32.

       get_thread_area() is Linux-specific and should not be used in  programs
       that are intended to be portable.

       Glibc does not provide a wrapper for this system call, since it is gen-
       erally intended for use only by threading libraries.  In  the  unlikely
       event that you want to call it directly, use syscall(2).

       modify_ldt(2), set_thread_area(2)

       This  page  is  part of release 3.74 of the Linux man-pages project.  A
       description of the project, information about reporting bugs,  and  the
       latest     version     of     this    page,    can    be    found    at

Linux                             2012-07-13                GET_THREAD_AREA(2)

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