Documentation needed

[Bob_Marlowe]

I desperately need some docs about interfacing the GNU-C with ARM assembly, register usage, linkage conventions etc. The docs I could found on Cypress's website including the PSoC5 Register Usage TRM are rather informative but even do not touch my subjects at all.

   

Who may help?

       

Bob

[Anonymous]

Hi Bob,

   

You can use the following link in Creator for GCC information: Help -> Documentation -> GCC

   

For more details on ARM you can visit the ARM website: http://infocenter.arm.com/help/index.jsp

       

Regards, Aniruddha

[Bob_Marlowe]

Thank you, I actually already did both, but there is a missing link: the connection between ARM asm and GCC.

   

As: for example: when I have a function with parameters, where do they go, where is the result given bacik, how are vars allocated and a handfull questions more.

       

Bob

[HeLi_263931 · Accepted solution]

My Google-fu tells me to search for "arm asm gcc", and delivers some starting points:

   

    
• http://www.ethernut.de/en/documents/arm-inline-asm.html
    
• http://www.devrs.com/gba/files/asmc.txt
    
• http://www.coranac.com/tonc/text/asm.htm
    
• http://omappedia.org/wiki/Writing_ARM_Assembly
   

   

To answer your question: the first 4 parameters go to r0-r3, 4 or more go to the stack. The result comes back in r0.

[Bob_Marlowe]

Thanx, enough to read for the weekend!

       

Bob