1 files changed, 80 insertions, 0 deletions
diff --git a/bfd/elf64-amdgcn.c b/bfd/elf64-amdgcn.c
new file mode 100644
index 00000000000..691fa0a34c1
--- /dev/null
+++ b/bfd/elf64-amdgcn.c
@@ -0,0 +1,80 @@
+/* AMDGCN ELF support for BFD.
+
+   Copyright (C) 2019-2022 Free Software Foundation, Inc.
+
+   This file is part of BFD, the Binary File Descriptor library.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+/* This file handles ELF files that are of the AMDGCN architecture.  The
+   format is documented here:
+
+     https://llvm.org/docs/AMDGPUUsage.html#elf-code-object */
+
+#include "sysdep.h"
+#include "bfd.h"
+#include "libbfd.h"
+#include "elf-bfd.h"
+#include "elf/amdgpu.h"
+
+#include <string.h>
+
+static bool
+elf64_amdgcn_object_p (bfd *abfd)
+{
+  Elf_Internal_Ehdr *hdr = elf_elfheader (abfd);
+  unsigned int mach;
+  unsigned char osabi;
+  unsigned char osabi_version;
+
+  BFD_ASSERT (hdr->e_machine == EM_AMDGPU);
+
+  osabi = hdr->e_ident[EI_OSABI];
+  osabi_version = hdr->e_ident[EI_ABIVERSION];
+
+  /* Objects with OS ABI HSA version 2 encoded the GPU model differently (in a
+     note), but they are deprecated, so we don't need to support them.  Reject
+     them specifically.
+
+     At the time of writing, all AMDGCN objects encode the specific GPU
+     model in the EF_AMDGPU_MACH field of e_flags.  */
+  if (osabi == ELFOSABI_AMDGPU_HSA
+      && osabi_version < ELFABIVERSION_AMDGPU_HSA_V3)
+    return false;
+
+  mach = elf_elfheader (abfd)->e_flags & EF_AMDGPU_MACH;
+
+  /* Avoid matching non-AMDGCN AMDGPU objects (e.g. r600).  */
+  if (mach < EF_AMDGPU_MACH_AMDGCN_MIN)
+    return false;
+
+  bfd_default_set_arch_mach (abfd, bfd_arch_amdgcn, mach);
+  return true;
+}
+
+
+#define TARGET_LITTLE_SYM	amdgcn_elf64_le_vec
+#define TARGET_LITTLE_NAME	"elf64-amdgcn"
+#define ELF_ARCH		bfd_arch_amdgcn
+#define ELF_TARGET_ID		AMDGCN_ELF_DATA
+#define ELF_MACHINE_CODE	EM_AMDGPU
+#define ELF_MAXPAGESIZE		0x10000 /* 64KB */
+#define ELF_COMMONPAGESIZE	0x1000  /* 4KB */
+
+#define bfd_elf64_bfd_reloc_type_lookup bfd_default_reloc_type_lookup
+#define bfd_elf64_bfd_reloc_name_lookup _bfd_norelocs_bfd_reloc_name_lookup
+
+#define elf_backend_object_p elf64_amdgcn_object_p
+
+#include "elf64-target.h"