1*c42dbd0eSchristos /* AMDGCN ELF support for BFD.
2*c42dbd0eSchristos
3*c42dbd0eSchristos Copyright (C) 2019-2022 Free Software Foundation, Inc.
4*c42dbd0eSchristos
5*c42dbd0eSchristos This file is part of BFD, the Binary File Descriptor library.
6*c42dbd0eSchristos
7*c42dbd0eSchristos This program is free software; you can redistribute it and/or modify
8*c42dbd0eSchristos it under the terms of the GNU General Public License as published by
9*c42dbd0eSchristos the Free Software Foundation; either version 3 of the License, or
10*c42dbd0eSchristos (at your option) any later version.
11*c42dbd0eSchristos
12*c42dbd0eSchristos This program is distributed in the hope that it will be useful,
13*c42dbd0eSchristos but WITHOUT ANY WARRANTY; without even the implied warranty of
14*c42dbd0eSchristos MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15*c42dbd0eSchristos GNU General Public License for more details.
16*c42dbd0eSchristos
17*c42dbd0eSchristos You should have received a copy of the GNU General Public License
18*c42dbd0eSchristos along with this program. If not, see <http://www.gnu.org/licenses/>. */
19*c42dbd0eSchristos
20*c42dbd0eSchristos /* This file handles ELF files that are of the AMDGCN architecture. The
21*c42dbd0eSchristos format is documented here:
22*c42dbd0eSchristos
23*c42dbd0eSchristos https://llvm.org/docs/AMDGPUUsage.html#elf-code-object */
24*c42dbd0eSchristos
25*c42dbd0eSchristos #include "sysdep.h"
26*c42dbd0eSchristos #include "bfd.h"
27*c42dbd0eSchristos #include "libbfd.h"
28*c42dbd0eSchristos #include "elf-bfd.h"
29*c42dbd0eSchristos #include "elf/amdgpu.h"
30*c42dbd0eSchristos
31*c42dbd0eSchristos #include <string.h>
32*c42dbd0eSchristos
33*c42dbd0eSchristos static bool
elf64_amdgcn_object_p(bfd * abfd)34*c42dbd0eSchristos elf64_amdgcn_object_p (bfd *abfd)
35*c42dbd0eSchristos {
36*c42dbd0eSchristos Elf_Internal_Ehdr *hdr = elf_elfheader (abfd);
37*c42dbd0eSchristos unsigned int mach;
38*c42dbd0eSchristos unsigned char osabi;
39*c42dbd0eSchristos unsigned char osabi_version;
40*c42dbd0eSchristos
41*c42dbd0eSchristos BFD_ASSERT (hdr->e_machine == EM_AMDGPU);
42*c42dbd0eSchristos
43*c42dbd0eSchristos osabi = hdr->e_ident[EI_OSABI];
44*c42dbd0eSchristos osabi_version = hdr->e_ident[EI_ABIVERSION];
45*c42dbd0eSchristos
46*c42dbd0eSchristos /* Objects with OS ABI HSA version 2 encoded the GPU model differently (in a
47*c42dbd0eSchristos note), but they are deprecated, so we don't need to support them. Reject
48*c42dbd0eSchristos them specifically.
49*c42dbd0eSchristos
50*c42dbd0eSchristos At the time of writing, all AMDGCN objects encode the specific GPU
51*c42dbd0eSchristos model in the EF_AMDGPU_MACH field of e_flags. */
52*c42dbd0eSchristos if (osabi == ELFOSABI_AMDGPU_HSA
53*c42dbd0eSchristos && osabi_version < ELFABIVERSION_AMDGPU_HSA_V3)
54*c42dbd0eSchristos return false;
55*c42dbd0eSchristos
56*c42dbd0eSchristos mach = elf_elfheader (abfd)->e_flags & EF_AMDGPU_MACH;
57*c42dbd0eSchristos
58*c42dbd0eSchristos /* Avoid matching non-AMDGCN AMDGPU objects (e.g. r600). */
59*c42dbd0eSchristos if (mach < EF_AMDGPU_MACH_AMDGCN_MIN)
60*c42dbd0eSchristos return false;
61*c42dbd0eSchristos
62*c42dbd0eSchristos bfd_default_set_arch_mach (abfd, bfd_arch_amdgcn, mach);
63*c42dbd0eSchristos return true;
64*c42dbd0eSchristos }
65*c42dbd0eSchristos
66*c42dbd0eSchristos
67*c42dbd0eSchristos #define TARGET_LITTLE_SYM amdgcn_elf64_le_vec
68*c42dbd0eSchristos #define TARGET_LITTLE_NAME "elf64-amdgcn"
69*c42dbd0eSchristos #define ELF_ARCH bfd_arch_amdgcn
70*c42dbd0eSchristos #define ELF_TARGET_ID AMDGCN_ELF_DATA
71*c42dbd0eSchristos #define ELF_MACHINE_CODE EM_AMDGPU
72*c42dbd0eSchristos #define ELF_MAXPAGESIZE 0x10000 /* 64KB */
73*c42dbd0eSchristos #define ELF_COMMONPAGESIZE 0x1000 /* 4KB */
74*c42dbd0eSchristos
75*c42dbd0eSchristos #define bfd_elf64_bfd_reloc_type_lookup bfd_default_reloc_type_lookup
76*c42dbd0eSchristos #define bfd_elf64_bfd_reloc_name_lookup _bfd_norelocs_bfd_reloc_name_lookup
77*c42dbd0eSchristos
78*c42dbd0eSchristos #define elf_backend_object_p elf64_amdgcn_object_p
79*c42dbd0eSchristos
80*c42dbd0eSchristos #include "elf64-target.h"
81