Tutorials Point


  Unix for Beginners
  Unix Shell Programming
  Advanced Unix
  Unix Useful References
  Unix Useful Resources
  Selected Reading

Copyright © 2014 by tutorialspoint



  Home     References     Discussion Forums     About TP  

sigreturn() - Unix, Linux System Call


previous next AddThis Social Bookmark Button


Advertisements

NAME

sigreturn - return from signal handler and cleanup stack frame

SYNOPSIS

int sigreturn(unsigned long __unused);

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 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



previous next Printer Friendly

Advertisements


  

Advertisements