Assembly function argument pass

frank涛李 — Tue, 20 Mar 2018 05:33:37 GMT

Hi NXP,

I'm coding assembly language on MK66FN2M0VMF18 processor.When I code a function in C format named uint8_t(uint8_t Address,uint32_t Data,uint8_t *p),and then the function will be called in the C source file.I want to know where the three arguments 'Address' 'Data' 'p' would be passed to in MK66FN2M0VMF18's registers.The store registers decide my assembly language.Can you give me some related docs or links?

Best regards,

Frank

Re: Assembly function argument pass

carlos_neri — Wed, 21 Mar 2018 20:52:20 GMT

ARM parameter passing rules states that you should use R0 - R3 for paramenters. If you need to pass more than 4, then, use the stack:

http://infocenter.arm.com/help/topic/com.arm.doc.ihi0042f/IHI0042F_aapcs.pdf

For parameter returns, you should use R0.

Kinetis Microcontrollers中的主题 Assembly function argument pass

Assembly function argument pass

Re: Assembly function argument pass