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nev@roadrunner.ipc.com said: > I tried to #include the .h file in the assembley file and feed it to > the c preprocessor. The output had the #include file data in it, so > 'as' choked. Use gcc to preprocess the assembly, like so: gcc -c foo.S Both .S and .s are assembler. By convention, .S is assembly source that needs to be preprocessed. Otherwise, gcc doesn't care. nev@roadrunner.ipc.com said: > I need to allocate a block of memory in the linker file. The size of > the block is a function of values declared in the .h file but the > location must be specified by the linker I would consider defining the size in the linker script and have the C program look at the external symbol instead of the #define. This may not be optimal, but will work. However, you can almost certainly do what you are trying to do in assembly, then load the specific file explicitly by the linker script. Create a section that you can locate by the linker script, and allocate the space relative the beginning of the section in the assembly file.