)]}'
{
  "commit": "978602e83f038106c8254424ca83991d784b37cf",
  "tree": "2713f291ce01c4b0df77e4cd296ca48c090676f4",
  "parents": [
    "f4f95df31b0172bf182e6a516ba23e299323bb2a"
  ],
  "author": {
    "name": "Simon Marchi",
    "email": "simon.marchi@efficios.com",
    "time": "Wed Mar 16 09:00:27 2022 -0400"
  },
  "committer": {
    "name": "Simon Marchi",
    "email": "simon.marchi@polymtl.ca",
    "time": "Wed Mar 16 09:00:27 2022 -0400"
  },
  "message": "bfd: add AMDGCN architecture\n\nAdd support for the AMDGCN architecture to BFD.\n\nThis is the bare minimum to get\n\n  $ ./configure --target\u003damdgcn-hsa-amdhsa --disable-gas\n  $ make all-binutils\n\nworking later in this series.\n\nThe specific AMDGCN models added here are a bit arbitrary, based on\nwhat we intend to initially support in GDB.  This list will need to be\nupdated in the future anyway.  The complete up-to-date list of existing\nAMDGPU models can be found here:\n\n  https://llvm.org/docs/AMDGPUUsage.html#processors\n\nThe ELF format for this architecture is documented here:\n\n  https://llvm.org/docs/AMDGPUUsage.html#elf-code-object\n\nThe flags for the \"HSA\" OS ABI are properly versioned and documented on\nthat page.  But the NONE, PAL and MESA3D OS ABIs are not well documented\nnor versioned.  Taking a peek at the LLVM source code, we see that they\nencode their flags the same way as HSA v3.  For example, for PAL:\n\n  https://github.com/llvm/llvm-project/blob/c8b614cd74a92d85936aed5ac7c642af75ffdc29/llvm/lib/Target/AMDGPU/MCTargetDesc/AMDGPUTargetStreamer.cpp#L601\n\nSo at least, we know that all AMDGPU objects (of which AMDGCN objects\nare a subset of) at the time of writing encode the specific GPU model in\nthe EF_AMDGPU_MACH field of e_flags.\n\nbfd/ChangeLog:\n\n\t* Makefile.am (ALL_MACHINES, ALL_MACHINES_CFILES):\n\tAdd cpu-amdgcn.c.\n\t(BFD64_BACKENDS): Add elf64-amdgcn.lo.\n\t(BFD64_BACKENDS_CFILES): Add elf64-amdgcn.c.\n\t* Makefile.in: Re-generate.\n\t* cpu-amdgcn.c: New.\n\t* elf64-amdgcn.c: New.\n\t* archures.c (bfd_architecture): Add bfd_arch_amdgcn and related\n\tmach defines.\n\t(bfd_amdgcn_arch): New.\n\t(bfd_archures_list): Add bfd_amdgcn_arch.\n\t* bfd-in2.h: Re-generate.\n\t* config.bfd: Handle amdgcn* target.\n\t* configure.ac: Handle amdgcn_elf64_le_vec.\n\t* configure: Re-generate.\n\t* elf-bfd.h (elf_target_id): Add AMDGCN_ELF_DATA.\n\t* targets.c (amdgcn_elf64_le_vec): New.\n\t(_bfd_target_vector): Add amdgcn_elf64_le_vec.\n\ninclude/ChangeLog:\n\n\t* elf/amdgpu.h: New.\n\t* elf/common.h (ELFOSABI_AMDGPU_HSA): Add.\n\nChange-Id: I969f7b14960797e88891c308749a6e341eece5b2\n",
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