Method for allocating memory

A method for managing a discontinuous call stack comprising at least one memory block from a plurality of memory blocks, the method comprising:

• reserving at least one of said plurality of memory blocks for interrupts;
• storing an interrupt location indicator indicating said reserved memory block in an interrupt stack pointer data store;
• storing a stack location indicator indicating a top of said discontinuous call stack in a function stack pointer data store;
• using said stack location indicator to identify a current memory block of said discontinuous call stack from said plurality of memory blocks, said current memory block storing said top of said discontinuous call stack and a previous location indicator indicating a location of a previous memory block of said discontinuous call stack;
• determining an amount of memory available in said current memory block;
• determining an amount of memory required for a stack frame;
• allocating said stack frame at least one memory block from said plurality of memory blocks in response to said determinations;
• storing said stack frame in said allocated memory block;
• and
• updating said stack location indicator in said function stack pointer data store, such that said updated stack location indicator can be used to identify said allocated memory block which has become said current memory block.