Dmitry,
I'm curious...how do you pass parameters to the functions you are calling? How
are the types and values specified, and how are they pushed onto the stack?
That aside, I think that you can do the following to call your functions:
void CallTrap (UInt16 trapWord)
{
// Write a small code stub that invokes the Palm OS function
// and then returns.
UInt16 code[3];
code[0] = 0x4E4F; // TRAP $F opcode
code[1] = trapWord; // System function selector
code[2] = 0x4E75; // RTS opcode
// Get a pointer to the code we created, and cast it as a function pointer.
typedef void (*FnPtr) (void);
FnPtr fn = (FnPtr) &code[0];
// Call the "function" we created.
fn();
}
-- Keith Rollin
-- Palm OS Emulator engineer
Dmitry Yakimov <[EMAIL PROTECTED]> on 02/17/2001 04:40:39 AM
Please respond to "Palm Developer Forum" <[EMAIL PROTECTED]>
Sent by: Dmitry Yakimov <[EMAIL PROTECTED]>
To: "Palm Developer Forum" <[EMAIL PROTECTED]>
cc: (Keith Rollin/US/PALM)
Subject: Hmm, the puzzle
Hello Palm,
Try to imagine - I have got some data in some resource.
This data is 2-bytes words and they mean trap codes to call palmAPI.
Then in code I need to write a cycle, that get this numbers from the
resource and call palmAPI functions with this numbers.
Motorola did not make command trap reg, and I'm confused :(
And palm do not allow me for example to compile trap #xxxx, and
then, before of each call change #xxxx because it is protected
storage and dwWrite works too long.
What may I do? Please help if you know something - it is live
important question for me.
--
Best regards,
Dmitry Yakimov
--
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