plucky (2) PR_GET_TID_ADDRESS.2const.gz

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NAME

       PR_GET_TID_ADDRESS - get the clear_child_tid address

LIBRARY

       Standard C library (libc, -lc)

SYNOPSIS

       #include <linux/prctl.h>  /* Definition of PR_* constants */
       #include <sys/prctl.h>

       int prctl(PR_GET_TID_ADDRESS, int **addrp);

DESCRIPTION

       Return  the clear_child_tid address set by set_tid_address(2) and the clone(2) CLONE_CHILD_CLEARTID flag,
       in the location pointed to by addrp.

       This feature is available only if the kernel is built with the CONFIG_CHECKPOINT_RESTORE option enabled.

RETURN VALUE

       On success, 0 is returned.  On error, -1 is returned, and errno is set to indicate the error.

ERRORS

       EFAULT addrp is an invalid address.

STANDARDS

       Linux.

HISTORY

       Linux 3.5.

CAVEATS

       Note that since the prctl() system call does not have a compat implementation for the AMD64 x32 and  MIPS
       n32  ABIs,  and the kernel writes out a pointer using the kernel's pointer size, this operation expects a
       user-space buffer of 8 (not 4) bytes on these ABIs.

SEE ALSO

       prctl(2)