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