Datasheet

The C and C++ Libraries
ARM DUI 0067D Copyright © 1999-2001 ARM Limited. All rights reserved. 4-23
The default implementation of __rt_entry :
1. Sets up the heap and stack.
2. Initializes the C library.
3. Calls
main() .
4. Shuts down the C library.
5. Exits.
__rt_entry must end with a call to one of the following functions:
exit() To get full atexit() handling and library shut down.
__rt_exit() To correctly shut down the library, bypassing atexit() processing.
_sys_exit() To exit directly to the execution environment, bypassing atexit() .
4.4.4 __rt_exit()
This function shuts down the library but does not call functions registered with
atexit() .
Syntax
void __rt_exit(int code)
code
Is not used by the standard function.
Implementation
The exit functions differ in their handling of the libraryand
atexit() functions:
exit() Calls atexit() -registered functions and shuts down the library.
__rt_exit() Shuts down the library but does not call atexit() functions.
_sys_exit() Does not shut down the library or call atexit() functions.
Returns
The function does not return.
4.4.5 __rt_lib_init()
This is the library initialization function and is the companion to
__rt_lib_shutdown() .