Hello,
I hope somebody can clarify this issue for me - I am sure it is somewhere in th ABI for it escapes me. Using ARM7 architecture (LPC2478), I have a function written in C that is called (BL) from the startup file. The problem is that the compiler does not generate a "BX LR" instruction at its end. Is there some limitation in place that I am not aware of?
"...the compiler does not generate a "BX LR" instruction at its end."
The only instance I know of where the compiler does not generate a return from a function is when it is an __asm function, so you add it to the function yourself.
If you look at the assembler produced for the C module, you surely see the returns in other functions?
Are you saying that your one C function just falls through to the next?
Well, another good reason for a compiler to omit a return from a function is the case when the function doesn't ever return, like a typical main(). So yes, some actual source code would be in order.
Mike,
I have an enormous amount of work now. I will try to post a code snippet in the very near future.
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