Embedded Systems Design, 2nd Edition

Writing software for embedded systems 307

Run-time libraries

The example assembler routines simply use the

predefined stack mechanisms to transfer data to and from

PASCAL. At no point does the routine actually know that the

data is coming from a high level language as opposed to an

assembler routine — let alone differentiate between C and

PASCAL. If a group of high level languages have common

transfer mechanisms, it should be possible to share libraries

and modules between them, without having to modify them or

know how they were generated. Unfortunately, this utopia has

not quite been realised, although some standards have been

put forward to implement ...