1 /* NFP-specific support for 64-bit ELF
2 Copyright (C) 2017-2023 Free Software Foundation, Inc.
3 Contributed by Francois H. Theron <francois.theron@netronome.com>
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, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor,
20 Boston, MA 02110-1301, USA. */
21
22 #include "sysdep.h"
23 #include "bfd.h"
24 #include "libbfd.h"
25 #include "elf-bfd.h"
26 #include "elf/nfp.h"
27
28
29 static bfd_reloc_status_type
30 elf64_nfp_reloc (bfd * abfd ATTRIBUTE_UNUSED,
31 arelent * reloc_entry,
32 asymbol * symbol,
33 void *data ATTRIBUTE_UNUSED,
34 asection * input_section,
35 bfd * output_bfd,
36 char **error_message ATTRIBUTE_UNUSED);
37
38 /* We don't actually apply any relocations in this toolset
39 so we make them all do nothing, but at least display useful
40 names.
41 Most of these are mainly used by the NFP toolchain to resolve things
42 before the final ELF file is created. */
43 #define NFP_HOWTO(type) \
44 HOWTO (type, 0, 0, 0, false, 0, complain_overflow_dont, elf64_nfp_reloc, \
45 #type, false, 0, 0, false)
46 static reloc_howto_type elf_nfp_howto_table[] =
47 {
48 NFP_HOWTO (R_NFP_NOTYPE),
49 NFP_HOWTO (R_NFP_W32LE),
50 NFP_HOWTO (R_NFP_SRC8_A),
51 NFP_HOWTO (R_NFP_SRC8_B),
52 NFP_HOWTO (R_NFP_IMMED8_I),
53 NFP_HOWTO (R_NFP_SC),
54 NFP_HOWTO (R_NFP_IMMED_LO16_I_A),
55 NFP_HOWTO (R_NFP_IMMED_LO16_I_B),
56 NFP_HOWTO (R_NFP_SRC7_B),
57 NFP_HOWTO (R_NFP_SRC7_A),
58 NFP_HOWTO (R_NFP_SRC8_I_B),
59 NFP_HOWTO (R_NFP_SRC8_I_A),
60 NFP_HOWTO (R_NFP_IMMED_HI16_I_A),
61 NFP_HOWTO (R_NFP_IMMED_HI16_I_B),
62 NFP_HOWTO (R_NFP_W64LE),
63 NFP_HOWTO (R_NFP_SH_INFO),
64 NFP_HOWTO (R_NFP_W32BE),
65 NFP_HOWTO (R_NFP_W64BE),
66 NFP_HOWTO (R_NFP_W32_29_24),
67 NFP_HOWTO (R_NFP_W32LE_AND),
68 NFP_HOWTO (R_NFP_W32BE_AND),
69 NFP_HOWTO (R_NFP_W32LE_OR),
70 NFP_HOWTO (R_NFP_W32BE_OR),
71 NFP_HOWTO (R_NFP_W64LE_AND),
72 NFP_HOWTO (R_NFP_W64BE_AND),
73 NFP_HOWTO (R_NFP_W64LE_OR),
74 NFP_HOWTO (R_NFP_W64BE_OR)
75 };
76
77 static bool
78 elf64_nfp_object_p (bfd * abfd)
79 {
80 /* If the e_machine value is one of the unofficial ones, we convert
81 it first and set e_flags accordingly for later consistency. */
82 if (elf_elfheader (abfd)->e_machine == E_NFP_MACH_3200)
83 {
84 elf_elfheader (abfd)->e_machine = EM_NFP;
85 elf_elfheader (abfd)->e_flags &= ~EF_NFP_SET_MACH (~0);
86 elf_elfheader (abfd)->e_flags |= EF_NFP_SET_MACH (E_NFP_MACH_3200);
87 }
88 else if (elf_elfheader (abfd)->e_machine == E_NFP_MACH_6000)
89 {
90 elf_elfheader (abfd)->e_machine = EM_NFP;
91 elf_elfheader (abfd)->e_flags &= ~EF_NFP_SET_MACH (~0);
92 elf_elfheader (abfd)->e_flags |= EF_NFP_SET_MACH (E_NFP_MACH_6000);
93 }
94
95 if (elf_elfheader (abfd)->e_machine == EM_NFP)
96 {
97 int e_mach = EF_NFP_MACH (elf_elfheader (abfd)->e_flags);
98
99 switch (e_mach)
100 {
101 case E_NFP_MACH_3200:
102 case E_NFP_MACH_6000:
103 if (!bfd_default_set_arch_mach (abfd, bfd_arch_nfp, e_mach))
104 return false;
105 default:
106 break;
107 }
108 }
109
110 return true;
111 }
112
113 static bool
114 elf64_nfp_section_from_shdr (bfd * abfd,
115 Elf_Internal_Shdr * hdr,
116 const char *name, int shindex)
117 {
118 switch (hdr->sh_type)
119 {
120 case SHT_NFP_INITREG:
121 case SHT_NFP_MECONFIG:
122 case SHT_NFP_UDEBUG:
123 return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
124 default:
125 return false;
126 }
127 }
128
129 bfd_reloc_status_type
130 elf64_nfp_reloc (bfd * abfd ATTRIBUTE_UNUSED,
131 arelent * reloc_entry ATTRIBUTE_UNUSED,
132 asymbol * symbol ATTRIBUTE_UNUSED,
133 void *data ATTRIBUTE_UNUSED,
134 asection * input_section ATTRIBUTE_UNUSED,
135 bfd * output_bfd ATTRIBUTE_UNUSED,
136 char **error_message ATTRIBUTE_UNUSED)
137 {
138 return bfd_reloc_ok;
139 }
140
141 static bool
142 elf64_nfp_info_to_howto (bfd * abfd ATTRIBUTE_UNUSED,
143 arelent * cache_ptr, Elf_Internal_Rela * dst)
144 {
145 unsigned int r_type;
146
147 r_type = ELF64_R_TYPE (dst->r_info);
148 if (r_type >= R_NFP_MAX)
149 {
150 /* xgettext:c-format */
151 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
152 abfd, r_type);
153 bfd_set_error (bfd_error_bad_value);
154 return false;
155 }
156 cache_ptr->howto = &elf_nfp_howto_table[r_type];
157 return true;
158 }
159
160 static reloc_howto_type *
161 elf64_nfp_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED,
162 bfd_reloc_code_real_type code ATTRIBUTE_UNUSED)
163 {
164 return NULL;
165 }
166
167 static reloc_howto_type *
168 elf64_nfp_reloc_name_lookup (bfd * abfd ATTRIBUTE_UNUSED,
169 const char *r_name ATTRIBUTE_UNUSED)
170 {
171 return NULL;
172 }
173
174 #define ELF_ARCH bfd_arch_nfp
175 #define ELF_MACHINE_CODE EM_NFP
176 #define ELF_MACHINE_ALT1 E_NFP_MACH_6000
177 #define ELF_MACHINE_ALT2 E_NFP_MACH_3200
178 #define ELF_MAXPAGESIZE 1
179 #define TARGET_LITTLE_NAME "elf64-nfp"
180 #define TARGET_LITTLE_SYM nfp_elf64_vec
181
182 #define elf_backend_object_p elf64_nfp_object_p
183 #define elf_backend_section_from_shdr elf64_nfp_section_from_shdr
184 #define elf_info_to_howto elf64_nfp_info_to_howto
185 #define bfd_elf64_bfd_reloc_type_lookup elf64_nfp_reloc_type_lookup
186 #define bfd_elf64_bfd_reloc_name_lookup elf64_nfp_reloc_name_lookup
187
188 #include "elf64-target.h"