DESCRIPTION

     When the Linux kernel creates the stack frame for  a  signal
     handler,  a  call  to  sigreturn  is inserted into the stack
     frame so that the the signal  handler  will  call  sigreturn
     upon  return.  This inserted call to sigreturn cleans up the
     stack so that the process can  restart  from  where  it  was
     interrupted by the signal.

RETURN VALUE

     sigreturn never returns.

WARNING

     The sigreturn call is used by the kernel to implement signal
     handlers.  It  should  never be called directly. Better yet,
     the specific use of the __unused argument  varies  depending
     on the architecture.

CONFORMING TO

     sigreturn is specific to Linux and should  not  be  used  in
     programs intended to be portable.

FILES

     /usr/src/linux/arch/i386/kernel/signal.c
     /usr/src/linux/arch/alpha/kernel/entry.S

SEE ALSO

     kill(2), signal(2), signal(7)