[PATCH 1/2] [WebAssembly] GAS support

[Nick Clifton]

Hi Pip,

> This patch adds support for assembling WebAssembly opcodes into ELF
> binaries (which can then be converted into WebAssembly modules). In
> order to pass tests, it also adds the first wasm32-specific relocation
> (other than R_WASM32_NONE), a simple absolute 32-bit relocation.

Thanks for doing this.  I have applied the patch basically as is.  The
only changes I made were to add entries in the gas/NEWS and binutils/NEWS
files, mentioning this new support.  Oh - and I have tweaked your gas 
documentation, so that it is now built as part of the general assembler 
documentation.  I did have to rearrange the c-wasm32.texi file a bit in
order to make the texinfo conversion work, so you may want to check that.
(Oh, c-wasm32.texi is a renamed version of your wasm32.texi file.  The
convention is that target specific texinfo files in the gas/doc directory
are named c-<target>.texi).


> +++ b/bfd/reloc.c

> +ENUM
> +  BFD_RELOC_WASM32_LEB128
> +ENUMX
> +  BFD_RELOC_WASM32_LEB128_GOT
> +ENUMX
> +  BFD_RELOC_WASM32_LEB128_GOT_CODE
> +ENUMX
> +  BFD_RELOC_WASM32_LEB128_PLT
> +ENUMX
> +  BFD_RELOC_WASM32_PLT_INDEX
> +ENUMX
> +  BFD_RELOC_WASM32_ABS32_CODE
> +ENUMX
> +  BFD_RELOC_WASM32_COPY
> +ENUMX
> +  BFD_RELOC_WASM32_CODE_POINTER
> +ENUMX
> +  BFD_RELOC_WASM32_INDEX
> +ENUMX
> +  BFD_RELOC_WASM32_PLT_SIG
> +ENUMDOC
> +  WebAssembly relocations.

One thing that I did note is that you are defining these new relocation names
in bfd/reloc.c but not handling them in elf32-wasm.c.  Are they going to be 
subject to a future patch ?

Cheers
  Nick