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978602e8 SM |
1 | /* AMDGCN ELF support for BFD. |
2 | ||
fd67aa11 | 3 | Copyright (C) 2019-2024 Free Software Foundation, Inc. |
978602e8 SM |
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" |