Re: Specifics on declaring sections in C code

[msokolov at ivan dot Harhan dot ORG (Michael Sokolov)]

Christopher Bahns <chris@bahns.com> wrote:

> 1. In my C source code, how do I direct specific types of information to
> certain sections? E.g. what if I want my code and initialized data to go
> into one section, uninitialized data to go into another section, and
> string literals to go into another? Of course, I want to specify the
> sections, since I want to override the default ".bss", ".text", ".data",
> etc.

Use section attributes. See "Function Attributes" and "Variable Attributes" in
"Using and Porting GCC".

> 2. Is there a return type from GNU's __asm__()? It appears that MRI's
> asm() can be used in the following way:
>
>     pTblRam = asm(void*, " move.l #.STARTOF.(UITBL_RAM),D0 ");
>
> Does GNU's __asm__() allow you to provide two arguments and/or use a
> return value? It would appear that MRI's asm() returns the value of the
> D0 register, with the type that is given as the first parameter ("void*"
> in this case). Again, MRI people please correct me if I'm wrong here.
> Anyone know how I should convert this line of MRI-compatible source code
> to GNU?
>
> Is GNU's __asm__ directive documented thoroughly somewhere?

See "Extended Asm" in "Using and Porting GCC".

--
Michael Sokolov		Harhan Engineering Laboratory
Public Service Agent	International Free Computing Task Force
			International Engineering and Science Task Force
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