[LLVMdev] Absolute assembler output

[Richard Pennington]

Hi,

I'm putting together a LLVM based compiler system that has two major use 
cases. In "normal" mode it generates bc files and in "native" mode it 
generates native object files.

I'm targeting embedded environments to I'm not very interested in, e.g, 
shared libraries.

In native mode, the normal compile/generate bc/generate asm/as/ld flow 
is used.

In bitcode mode the object files are bc files and archives contain bc as 
well. A program is built by linking the bc files and archives into a 
single bc file with no external references.

Currently, I generate asm/as/ld the resultant file. I was thinking that 
it would be interesting to modify gnu as to read a (simplified) linker 
script file and do the (simplified) locating itself.

Does that sound completely out of whack? If so, maybe a few more cups of 
coffee will make the idea go away.

-Rich

P.S. In re-reading this email I realize that it is a binutils question 
more than an LLVM question and therefore off topic. I hope you don't 
mind that I send it anyway because I value the list's opinion.

P.P.S. It also occurs to me that gnu as may not handle absolute sections 
at all (getting rid of relocation records, for example), which might 
mean writing an assembler from scratch may be the way to go.