topic Re: Calling c functions from assembly file in codewarrior for MCF5485 Coldfire in ColdFire/68K Microcontrollers and Processors

Calling c functions from assembly file in codewarrior for MCF5485 Coldfire

preetuabraham — Mon, 20 Feb 2017 20:22:56 GMT

Hi,

I am working with "CodeWarrior for MCU Version: 10.6" for MCF5485 coldfire .

I have some functions in my C-File. I have to call those function in the .s file.

Could you please give me the procedure to call the functions and to pass the parameters.

Re: Calling c functions from assembly file in codewarrior for MCF5485 Coldfire

TomE — Tue, 21 Feb 2017 00:17:17 GMT

Search this forum for "calling c from assembly" and see if any of them help.I gave up counting at ONE HUNDRED. You should search before posting (and if you have searched and found nothing, say so, and detail why your problem is different from the previous ones).

Watch out that the ABI changed after CW 7.2, so any examples prior to that (MOST examples are prior to that) won't work on later CW versions.

I only know the ABI for gcc, and that's different to CW.

Why do you need to call C from Assembly? It is usually always better to get from Assembly into C ASAP and then stay there.

Tom

Re: Calling c functions from assembly file in codewarrior for MCF5485 Coldfire

miduo — Mon, 13 Mar 2017 08:36:33 GMT

Hi,

Assembly language programs can call the functions written in either C or assembly language. From within the assembly language instructions, you can call the C functions. For example, if the C function definition is:

int my_c_func ( int i)

{

return i++;

}

the assembly language calling statement should be:

jsr _my_c_func