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/* 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"
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