strange relocation enties (scattered data)

strange relocation enties (scattered data)

[Jan Hoogerbrugge]

Hi,

I am porting bintutils to an achitecture where 32-bit absolute addresses are 
not stored in 32 consecutive bits in instruction memory but in 6 groups of a 
few bits. The distance between the bit groups varies per instruction. My 
question is how to relocate these addresses. I think that I need to add 
parameters to the relocation entries that describe how the 32 bits are 
scattered in memory. Is this possible with BFD_ASSEMBLER?

Cheers,
Jan



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Re: strange relocation enties (scattered data)

[Nick Clifton]

Hi Jan,

> I am porting binutils to an architecture where 32-bit absolute
> addresses are not stored in 32 consecutive bits in instruction
> memory but in 6 groups of a few bits.

Now that is a strange architecture.

> The distance between the bit groups varies per instruction. My
> question is how to relocate these addresses. I think that I need to
> add parameters to the relocation entries that describe how the 32
> bits are scattered in memory.

Or better yet make use of the 'special_function' field to provide your
own routines to handle the relocs for these instructions,

> Is this possible with BFD_ASSEMBLER?

Yes.

Cheers
        Nick

Re: strange relocation enties (scattered data)

[Richard Henderson]

On Fri, Dec 21, 2001 at 03:45:51PM +0000, Nick Clifton wrote:
> > I am porting binutils to an architecture where 32-bit absolute
> > addresses are not stored in 32 consecutive bits in instruction
> > memory but in 6 groups of a few bits.
> 
> Now that is a strange architecture.

See PA and IA64 which split constants into as many as 5 pieces.


r~