1 /* AMDGCN ELF support for BFD. 2 3 Copyright (C) 2019-2022 Free Software Foundation, Inc. 4 5 This file is part of BFD, the Binary File Descriptor library. 6 7 This program is free software; you can redistribute it and/or modify 8 it under the terms of the GNU General Public License as published by 9 the Free Software Foundation; either version 3 of the License, or 10 (at your option) any later version. 11 12 This program is distributed in the hope that it will be useful, 13 but WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 GNU General Public License for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with this program. If not, see <http://www.gnu.org/licenses/>. */ 19 20 /* This file handles ELF files that are of the AMDGCN architecture. The 21 format is documented here: 22 23 https://llvm.org/docs/AMDGPUUsage.html#elf-code-object */ 24 25 #include "sysdep.h" 26 #include "bfd.h" 27 #include "libbfd.h" 28 #include "elf-bfd.h" 29 #include "elf/amdgpu.h" 30 31 #include <string.h> 32 33 static bool 34 elf64_amdgcn_object_p (bfd *abfd) 35 { 36 Elf_Internal_Ehdr *hdr = elf_elfheader (abfd); 37 unsigned int mach; 38 unsigned char osabi; 39 unsigned char osabi_version; 40 41 BFD_ASSERT (hdr->e_machine == EM_AMDGPU); 42 43 osabi = hdr->e_ident[EI_OSABI]; 44 osabi_version = hdr->e_ident[EI_ABIVERSION]; 45 46 /* Objects with OS ABI HSA version 2 encoded the GPU model differently (in a 47 note), but they are deprecated, so we don't need to support them. Reject 48 them specifically. 49 50 At the time of writing, all AMDGCN objects encode the specific GPU 51 model in the EF_AMDGPU_MACH field of e_flags. */ 52 if (osabi == ELFOSABI_AMDGPU_HSA 53 && osabi_version < ELFABIVERSION_AMDGPU_HSA_V3) 54 return false; 55 56 mach = elf_elfheader (abfd)->e_flags & EF_AMDGPU_MACH; 57 58 /* Avoid matching non-AMDGCN AMDGPU objects (e.g. r600). */ 59 if (mach < EF_AMDGPU_MACH_AMDGCN_MIN) 60 return false; 61 62 bfd_default_set_arch_mach (abfd, bfd_arch_amdgcn, mach); 63 return true; 64 } 65 66 67 #define TARGET_LITTLE_SYM amdgcn_elf64_le_vec 68 #define TARGET_LITTLE_NAME "elf64-amdgcn" 69 #define ELF_ARCH bfd_arch_amdgcn 70 #define ELF_TARGET_ID AMDGCN_ELF_DATA 71 #define ELF_MACHINE_CODE EM_AMDGPU 72 #define ELF_MAXPAGESIZE 0x10000 /* 64KB */ 73 #define ELF_COMMONPAGESIZE 0x1000 /* 4KB */ 74 75 #define bfd_elf64_bfd_reloc_type_lookup bfd_default_reloc_type_lookup 76 #define bfd_elf64_bfd_reloc_name_lookup _bfd_norelocs_bfd_reloc_name_lookup 77 78 #define elf_backend_object_p elf64_amdgcn_object_p 79 80 #include "elf64-target.h" 81