Zilog Z8F0130 - Manual (Page 102)

Using the Integrated Development Environment UM013037-1212
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Zilog Developer Studio II – Z8 Encore!
User Manual
and calls made with function pointers cannot be used with static frames, except by the
selective application of the
reentrant keyword. To learn more about the trade-offs
between static and dynamic frames, see the Call Frames section on page 200.
Parameter Passing
When you select Memory , the parameters are placed on the stack for dynamic frame func-
tions. For static frame functions, the parameters are placed in static memory (register file).
See the
Function Call Mechanism: Dynamic Frame section on page 215 and the Function
Call Mechanism: Static Frame section on page 216 for further details.
When you select Register , the working registers R8-R13 are used to place the scalar
parameters of function. The rest of the parameters are placed in memory. See the Function
Call Mechanism: Register Parameter Passing section on page 218 for further details.
In most cases, selecting Register results in a smaller overall code size for your applica-
tion, but this is not guaranteed; check your results using the map file to make certain. Also,
if your application uses both C and assembly code, and the assembly code accesses any
parameters to a C function, you must make sure that the location of those C parameters
that is assumed in the assembly code continues to match the option you have selected for
Parameter Passing. See the
Calling Conventions section on page 215 for more details.
C: Listing Files Page
For Assembly Only projects, the Listing Files page is not available.
The options in the Listing Files page are described in this section.
Note: