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caed7120 | 1 | /* AArch64-specific backend routines. |
b3adc24a | 2 | Copyright (C) 2009-2020 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 | 21 | extern void bfd_elf64_aarch64_init_maps |
7ff36d1a | 22 | (bfd *, struct bfd_link_info *); |
a8bfaadb AM |
23 | |
24 | extern void bfd_elf32_aarch64_init_maps | |
7ff36d1a | 25 | (bfd *, struct bfd_link_info *); |
a8bfaadb AM |
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 *); | |
81 | extern bfd_boolean elf64_aarch64_size_stubs | |
82 | (bfd *, bfd *, struct bfd_link_info *, bfd_signed_vma, | |
83 | struct bfd_section * (*) (const char *, struct bfd_section *), | |
84 | void (*) (void)); | |
7ff36d1a SP |
85 | |
86 | extern void elf64_c64_resize_sections (bfd *, struct bfd_link_info *, | |
87 | void (*) (asection *, bfd_vma), | |
88 | void (*) (void)); | |
89 | ||
a8bfaadb AM |
90 | extern bfd_boolean elf64_aarch64_build_stubs |
91 | (struct bfd_link_info *); | |
92 | /* AArch64 stub generation support for ELF32. Called from the linker. */ | |
93 | extern int elf32_aarch64_setup_section_lists | |
94 | (bfd *, struct bfd_link_info *); | |
95 | extern void elf32_aarch64_next_input_section | |
96 | (struct bfd_link_info *, struct bfd_section *); | |
97 | extern bfd_boolean elf32_aarch64_size_stubs | |
98 | (bfd *, bfd *, struct bfd_link_info *, bfd_signed_vma, | |
99 | struct bfd_section * (*) (const char *, struct bfd_section *), | |
100 | void (*) (void)); | |
101 | extern bfd_boolean elf32_aarch64_build_stubs | |
102 | (struct bfd_link_info *); | |
103 | ||
7ff36d1a SP |
104 | extern void elf32_c64_resize_sections (bfd *, struct bfd_link_info *, |
105 | void (*) (asection *, bfd_vma), | |
106 | void (*) (void)); | |
107 | ||
caed7120 | 108 | /* Take the PAGE component of an address or offset. */ |
07d6d2b8 | 109 | #define PG(x) ((x) & ~ (bfd_vma) 0xfff) |
d0ae9fbd | 110 | #define PG_OFFSET(x) ((x) & (bfd_vma) 0xfff) |
caed7120 | 111 | |
4106101c MS |
112 | #define AARCH64_ADR_OP 0x10000000 |
113 | #define AARCH64_ADRP_OP 0x90000000 | |
114 | #define AARCH64_ADRP_OP_MASK 0x9F000000 | |
115 | ||
116 | extern bfd_signed_vma | |
117 | _bfd_aarch64_sign_extend (bfd_vma, int); | |
118 | ||
119 | extern uint32_t | |
120 | _bfd_aarch64_decode_adrp_imm (uint32_t); | |
121 | ||
122 | extern uint32_t | |
92504105 | 123 | _bfd_aarch64_reencode_adr_imm (uint32_t, uint32_t, uint32_t); |
4106101c | 124 | |
caed7120 YZ |
125 | extern bfd_reloc_status_type |
126 | _bfd_aarch64_elf_put_addend (bfd *, bfd_byte *, bfd_reloc_code_real_type, | |
127 | reloc_howto_type *, bfd_signed_vma); | |
128 | ||
129 | extern bfd_vma | |
652afeef TC |
130 | _bfd_aarch64_elf_resolve_relocation (bfd *, bfd_reloc_code_real_type, bfd_vma, |
131 | bfd_vma, bfd_vma, bfd_boolean); | |
caed7120 | 132 | |
caed7120 YZ |
133 | extern bfd_boolean |
134 | _bfd_aarch64_elf_grok_prstatus (bfd *, Elf_Internal_Note *); | |
135 | ||
d0ae9fbd OJ |
136 | extern bfd_boolean |
137 | _bfd_aarch64_elf_grok_psinfo (bfd *, Elf_Internal_Note *); | |
138 | ||
139 | extern char * | |
140 | _bfd_aarch64_elf_write_core_note (bfd *, char *, int *, int, ...); | |
caed7120 | 141 | |
caed7120 | 142 | #define elf_backend_grok_prstatus _bfd_aarch64_elf_grok_prstatus |
07d6d2b8 AM |
143 | #define elf_backend_grok_psinfo _bfd_aarch64_elf_grok_psinfo |
144 | #define elf_backend_write_core_note _bfd_aarch64_elf_write_core_note | |
cd702818 SD |
145 | |
146 | extern bfd * | |
147 | _bfd_aarch64_elf_link_setup_gnu_properties (struct bfd_link_info *, | |
148 | uint32_t *); | |
149 | ||
150 | extern enum elf_property_kind | |
151 | _bfd_aarch64_elf_parse_gnu_properties (bfd *, unsigned int, | |
152 | bfd_byte *, unsigned int); | |
153 | ||
154 | extern bfd_boolean | |
155 | _bfd_aarch64_elf_merge_gnu_properties (struct bfd_link_info *, bfd *, | |
156 | elf_property *, elf_property *, | |
157 | uint32_t); | |
158 | ||
acde6c6b SD |
159 | extern void |
160 | _bfd_aarch64_elf_link_fixup_gnu_properties (struct bfd_link_info *, | |
161 | elf_property_list **); | |
162 | ||
cd702818 SD |
163 | #define elf_backend_parse_gnu_properties \ |
164 | _bfd_aarch64_elf_parse_gnu_properties | |
acde6c6b SD |
165 | |
166 | #define elf_backend_fixup_gnu_properties \ | |
167 | _bfd_aarch64_elf_link_fixup_gnu_properties |