Hi
Both the palms I've seen are M68k-based.
Are all PalmOS devices M68k-based?
Do their API functions have the same stack frame structure?
I ask because I'm about to write a low-level assembler routine to act as
a universal wrapper for the whole PalmOS API.
>From C, the routine will look like:
call_api_func(void *funcaddr, int num_args, int retval_size,
int arg1_size, int arg1_value,
...
int argn_size, int argn_value)
The routine will then analyse these args, and set up a stack frame
appropriately for whatever API function it's calling, call that
function, then pass the return value back to its caller.
For example, it will be possible to have a statement like:
nchars = call_api_func(FldGetMaxChars, 1, 2,
4, fldPtr);
Does such a function already exist in some form, to save me the trouble?
Is there any thing I should watch out for if I go ahead and write one
myself?
Cheers
David
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