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caed7120 | 1 | /* AArch64-specific backend routines. |
250d07de | 2 | Copyright (C) 2009-2021 Free Software Foundation, Inc. |
caed7120 YZ |
3 | Contributed by ARM Ltd. |
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; see the file COPYING3. If not, | |
19 | see <http://www.gnu.org/licenses/>. */ | |
20 | ||
a8bfaadb AM |
21 | extern void bfd_elf64_aarch64_init_maps |
22 | (bfd *); | |
23 | ||
24 | extern void bfd_elf32_aarch64_init_maps | |
25 | (bfd *); | |
26 | ||
27 | /* Types of PLTs based on the level of security. This would be a | |
28 | bit-mask to denote which of the combinations of security features | |
29 | are enabled: | |
30 | - No security feature PLTs | |
31 | - PLTs with BTI instruction | |
32 | - PLTs with PAC instruction | |
33 | */ | |
34 | typedef enum | |
35 | { | |
36 | PLT_NORMAL = 0x0, /* Normal plts. */ | |
37 | PLT_BTI = 0x1, /* plts with bti. */ | |
38 | PLT_PAC = 0x2, /* plts with pointer authentication. */ | |
39 | PLT_BTI_PAC = PLT_BTI | PLT_PAC | |
40 | } aarch64_plt_type; | |
41 | ||
42 | /* To indicate if BTI is enabled with/without warning. */ | |
43 | typedef enum | |
44 | { | |
45 | BTI_NONE = 0, /* BTI is not enabled. */ | |
46 | BTI_WARN = 1, /* BTI is enabled with -z force-bti. */ | |
47 | } aarch64_enable_bti_type; | |
48 | ||
49 | /* A structure to encompass all information coming from BTI or PAC | |
50 | related command line options. This involves the "PLT_TYPE" to determine | |
51 | which version of PLTs to pick and "BTI_TYPE" to determine if | |
52 | BTI should be turned on with any warnings. */ | |
53 | typedef struct | |
54 | { | |
55 | aarch64_plt_type plt_type; | |
56 | aarch64_enable_bti_type bti_type; | |
57 | } aarch64_bti_pac_info; | |
58 | ||
59 | /* An enum to define what kind of erratum fixes we should apply. This gives the | |
60 | user a bit more control over the sequences we generate. */ | |
61 | typedef enum | |
62 | { | |
63 | ERRAT_NONE = (1 << 0), /* No erratum workarounds allowed. */ | |
64 | ERRAT_ADR = (1 << 1), /* Erratum workarounds using ADR allowed. */ | |
65 | ERRAT_ADRP = (1 << 2), /* Erratum workarounds using ADRP are allowed. */ | |
66 | } erratum_84319_opts; | |
67 | ||
68 | extern void bfd_elf64_aarch64_set_options | |
69 | (bfd *, struct bfd_link_info *, int, int, int, int, erratum_84319_opts, int, | |
70 | aarch64_bti_pac_info); | |
71 | ||
72 | extern void bfd_elf32_aarch64_set_options | |
73 | (bfd *, struct bfd_link_info *, int, int, int, int, erratum_84319_opts, int, | |
74 | aarch64_bti_pac_info); | |
75 | ||
76 | /* AArch64 stub generation support for ELF64. Called from the linker. */ | |
77 | extern int elf64_aarch64_setup_section_lists | |
78 | (bfd *, struct bfd_link_info *); | |
79 | extern void elf64_aarch64_next_input_section | |
80 | (struct bfd_link_info *, struct bfd_section *); | |
0a1b45a2 | 81 | extern bool elf64_aarch64_size_stubs |
a8bfaadb AM |
82 | (bfd *, bfd *, struct bfd_link_info *, bfd_signed_vma, |
83 | struct bfd_section * (*) (const char *, struct bfd_section *), | |
84 | void (*) (void)); | |
0a1b45a2 | 85 | extern bool elf64_aarch64_build_stubs |
a8bfaadb AM |
86 | (struct bfd_link_info *); |
87 | /* AArch64 stub generation support for ELF32. Called from the linker. */ | |
88 | extern int elf32_aarch64_setup_section_lists | |
89 | (bfd *, struct bfd_link_info *); | |
90 | extern void elf32_aarch64_next_input_section | |
91 | (struct bfd_link_info *, struct bfd_section *); | |
0a1b45a2 | 92 | extern bool elf32_aarch64_size_stubs |
a8bfaadb AM |
93 | (bfd *, bfd *, struct bfd_link_info *, bfd_signed_vma, |
94 | struct bfd_section * (*) (const char *, struct bfd_section *), | |
95 | void (*) (void)); | |
0a1b45a2 | 96 | extern bool elf32_aarch64_build_stubs |
a8bfaadb AM |
97 | (struct bfd_link_info *); |
98 | ||
caed7120 | 99 | /* Take the PAGE component of an address or offset. */ |
07d6d2b8 | 100 | #define PG(x) ((x) & ~ (bfd_vma) 0xfff) |
d0ae9fbd | 101 | #define PG_OFFSET(x) ((x) & (bfd_vma) 0xfff) |
caed7120 | 102 | |
4106101c MS |
103 | #define AARCH64_ADR_OP 0x10000000 |
104 | #define AARCH64_ADRP_OP 0x90000000 | |
105 | #define AARCH64_ADRP_OP_MASK 0x9F000000 | |
106 | ||
107 | extern bfd_signed_vma | |
108 | _bfd_aarch64_sign_extend (bfd_vma, int); | |
109 | ||
110 | extern uint32_t | |
111 | _bfd_aarch64_decode_adrp_imm (uint32_t); | |
112 | ||
113 | extern uint32_t | |
114 | _bfd_aarch64_reencode_adr_imm (uint32_t, uint32_t); | |
115 | ||
caed7120 YZ |
116 | extern bfd_reloc_status_type |
117 | _bfd_aarch64_elf_put_addend (bfd *, bfd_byte *, bfd_reloc_code_real_type, | |
118 | reloc_howto_type *, bfd_signed_vma); | |
119 | ||
120 | extern bfd_vma | |
652afeef | 121 | _bfd_aarch64_elf_resolve_relocation (bfd *, bfd_reloc_code_real_type, bfd_vma, |
0a1b45a2 | 122 | bfd_vma, bfd_vma, bool); |
caed7120 | 123 | |
0a1b45a2 | 124 | extern bool |
caed7120 YZ |
125 | _bfd_aarch64_elf_grok_prstatus (bfd *, Elf_Internal_Note *); |
126 | ||
0a1b45a2 | 127 | extern bool |
d0ae9fbd OJ |
128 | _bfd_aarch64_elf_grok_psinfo (bfd *, Elf_Internal_Note *); |
129 | ||
130 | extern char * | |
131 | _bfd_aarch64_elf_write_core_note (bfd *, char *, int *, int, ...); | |
caed7120 | 132 | |
caed7120 | 133 | #define elf_backend_grok_prstatus _bfd_aarch64_elf_grok_prstatus |
07d6d2b8 AM |
134 | #define elf_backend_grok_psinfo _bfd_aarch64_elf_grok_psinfo |
135 | #define elf_backend_write_core_note _bfd_aarch64_elf_write_core_note | |
cd702818 SD |
136 | |
137 | extern bfd * | |
138 | _bfd_aarch64_elf_link_setup_gnu_properties (struct bfd_link_info *, | |
139 | uint32_t *); | |
140 | ||
141 | extern enum elf_property_kind | |
142 | _bfd_aarch64_elf_parse_gnu_properties (bfd *, unsigned int, | |
143 | bfd_byte *, unsigned int); | |
144 | ||
0a1b45a2 | 145 | extern bool |
cd702818 SD |
146 | _bfd_aarch64_elf_merge_gnu_properties (struct bfd_link_info *, bfd *, |
147 | elf_property *, elf_property *, | |
148 | uint32_t); | |
149 | ||
acde6c6b SD |
150 | extern void |
151 | _bfd_aarch64_elf_link_fixup_gnu_properties (struct bfd_link_info *, | |
152 | elf_property_list **); | |
153 | ||
cd702818 SD |
154 | #define elf_backend_parse_gnu_properties \ |
155 | _bfd_aarch64_elf_parse_gnu_properties | |
acde6c6b SD |
156 | |
157 | #define elf_backend_fixup_gnu_properties \ | |
158 | _bfd_aarch64_elf_link_fixup_gnu_properties |