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ARM Compiler ARM C and C++ Libraries and Floating-Point Support User Guide : __default_signal_handler()


Defined in rt_misc.h, the __default_signal_handler() function handles a raised signal. The default action is to print an error message and exit.

This function is not part of the C library standard, but the ARM® C library supports it as an extension.


int __default_signal_handler(int signal, intptr_t type);


The default signal handler returns a nonzero value to indicate that the caller has to arrange for the program to exit. You can replace the default signal handler by defining:

int __default_signal_handler(int signal, intptr_t type);

The interface is the same as __raise(), but this function is only called after the C signal handling mechanism has declined to process the signal.

complete list of the defined signals is in signal.h.


The signals used by the libraries might change in future releases of ARM Compiler.