Datasheet

The C and C++ Libraries

Syntax

extern value_in_regs struct __argc_argv __rt_lib_init(unsigned heapbase,

unsigned heaptop)

heapbase

Is the start of the heap memory block.

heaptop

Is the end of the heap memory block.

Implementation

This is the library initialization function. It is called immediatelyafter

__rt_stackheap_init()

and passed an initial chunk of memory to use as a heap. This

function is the standard ARM library initialization function and must not be

re-implemented.

Returns

The function returns

argc

and

argv

ready to be passed to

main()

. The structure is

returned in the registers as:

struct __argc_argv { int argc; char **argv;};

4.4.6 __rt_lib_shutdown()

This is the library shutdown function and is the companion to

__rt_lib_init()

Syntax

void __rt_lib_shutdown(void )

Implementation

This is the library shutdown function and is provided in casea user must call it directly.

This is the standard ARM library shutdown function and must not be re-implemented.