RISCV: Add IMAGE_FILE_MACHINE COFF address spaces

[martell]

Summary

PE spec defines and reserves to following for RISCV

IMAGE_FILE_MACHINE_RISCV32 0x5032
IMAGE_FILE_MACHINE_RISCV64 0x5064
IMAGE_FILE_MACHINE_RISCV128 0x5128

https://msdn.microsoft.com/en-us/library/windows/desktop/ms680547(v=vs.85).aspx

Adds support to COFFDumper and COFFYAML interchange.

[compnerd]

Cn you add a roundtrip test through yaml2obj/obj2yaml and a test for the COFF dumper?

[asb]

With the addition of a test this looks good to me, thanks! Please try and remember to upload patches with full context (http://llvm.org/docs/Phabricator.html).

[asb]

Hi @martell, do you think you might have time to add a test for this?

[martell]

Sorry for the delay,
I looked back on this a few times and I don't have the relocations to support doing a full round trip.
It does seem however that tests are only done for the 4 fully supported arch's.
IMAGE_FILE_MACHINE_I386
IMAGE_FILE_MACHINE_AMD64
IMAGE_FILE_MACHINE_ARMNT
IMAGE_FILE_MACHINE_ARM64
see obj2yaml.test for reference.

Update:

I noticed that this actually fail for the other arches when I added support for RISCV in a test case.
I think this is because we need relocations for a proper testcase like x86 and arm.

I will change this to only add it in include/llvm/BinaryFormat/COFF.h and commit that for now.

llvm/trunk/include/llvm/BinaryFormat/COFF.h

enum MachineTypes : unsigned {
   IMAGE_FILE_MACHINE_IA64 = 0x200,
   IMAGE_FILE_MACHINE_M32R = 0x9041,
   IMAGE_FILE_MACHINE_MIPS16 = 0x266,
   IMAGE_FILE_MACHINE_MIPSFPU = 0x366,
   IMAGE_FILE_MACHINE_MIPSFPU16 = 0x466,
   IMAGE_FILE_MACHINE_POWERPC = 0x1F0,
   IMAGE_FILE_MACHINE_POWERPCFP = 0x1F1,
   IMAGE_FILE_MACHINE_R4000 = 0x166,
+  IMAGE_FILE_MACHINE_RISCV32 = 0x5032,
+  IMAGE_FILE_MACHINE_RISCV64 = 0x5064,
+  IMAGE_FILE_MACHINE_RISCV128 = 0x5128,
   IMAGE_FILE_MACHINE_SH3 = 0x1A2,
   IMAGE_FILE_MACHINE_SH3DSP = 0x1A3,
   IMAGE_FILE_MACHINE_SH4 = 0x1A6,
   IMAGE_FILE_MACHINE_SH5 = 0x1A8,
   IMAGE_FILE_MACHINE_THUMB = 0x1C2,
   IMAGE_FILE_MACHINE_WCEMIPSV2 = 0x169
 };