ARM asm, how to return a value -- Please help

Hi, in a given c program where you have

myvar = sumR(char * arg1, int arg2)

sumR is a function in an assembly .s file. I have done all the calculations, but I have no idea how to return the value to the calling c program.

Any ideas?

Thanks so much.

Light Poster

35 posts since Nov 2010

Reputation Points: 10

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Usually the value is returned in R0. So in your sumR, after you do your stuff, place what you want myvar to equal in R0

xor eax, eax

Team Colleague

79 posts since Jan 2011

Reputation Points: 38

Solved Threads: 13

Thanks. If you don't mind one more, how do you print the contents of a register which contains an int.