afs-ld Public

Watch 0 Fork 0 Star 0
Rust · 7283 bytes Raw Blame History
1 //! Numeric constants mirrored from Apple's `<mach-o/loader.h>`, `<mach-o/nlist.h>`,
2 //! `<mach-o/reloc.h>`, and `<mach-o/arm64/reloc.h>`. Duplicated from afs-as
3 //! rather than cross-crate coupled so each submodule remains independent.
4 //!
5 //! Sprint 0 lands the baseline set the reader needs in Sprint 1; later sprints
6 //! extend this module as new load commands / section flags / relocation types
7 //! come into scope.
8
9 // Magic and file types
10 pub const MH_MAGIC_64: u32 = 0xFEEDFACF;
11 pub const CPU_TYPE_ARM64: u32 = 0x0100_000C;
12 pub const CPU_SUBTYPE_ARM64_ALL: u32 = 0;
13
14 pub const MH_OBJECT: u32 = 1;
15 pub const MH_EXECUTE: u32 = 2;
16 pub const MH_DYLIB: u32 = 6;
17
18 // Mach header flags
19 pub const MH_NOUNDEFS: u32 = 0x1;
20 pub const MH_DYLDLINK: u32 = 0x4;
21 pub const MH_TWOLEVEL: u32 = 0x80;
22 pub const MH_SUBSECTIONS_VIA_SYMBOLS: u32 = 0x2000;
23 pub const MH_PIE: u32 = 0x0020_0000;
24 pub const MH_HAS_TLV_DESCRIPTORS: u32 = 0x0080_0000;
25
26 // Load command kinds (subset afs-as emits plus the writer will need)
27 pub const LC_REQ_DYLD: u32 = 0x8000_0000;
28
29 pub const LC_SEGMENT_64: u32 = 0x19;
30 pub const LC_SYMTAB: u32 = 0x02;
31 pub const LC_DYSYMTAB: u32 = 0x0B;
32 pub const LC_LOAD_DYLIB: u32 = 0x0C;
33 pub const LC_ID_DYLIB: u32 = 0x0D;
34 pub const LC_LOAD_DYLINKER: u32 = 0x0E;
35 pub const LC_LOAD_WEAK_DYLIB: u32 = 0x18 | LC_REQ_DYLD;
36 pub const LC_REEXPORT_DYLIB: u32 = 0x1F | LC_REQ_DYLD;
37 pub const LC_UUID: u32 = 0x1B;
38 pub const LC_RPATH: u32 = 0x1C | LC_REQ_DYLD;
39 pub const LC_CODE_SIGNATURE: u32 = 0x1D;
40 pub const LC_FUNCTION_STARTS: u32 = 0x26;
41 pub const LC_DATA_IN_CODE: u32 = 0x29;
42 pub const LC_SOURCE_VERSION: u32 = 0x2A;
43 pub const LC_LINKER_OPTIMIZATION_HINT: u32 = 0x2E;
44 pub const LC_BUILD_VERSION: u32 = 0x32;
45 pub const LC_DYLD_INFO_ONLY: u32 = 0x22 | LC_REQ_DYLD;
46 pub const LC_DYLD_CHAINED_FIXUPS: u32 = 0x34 | LC_REQ_DYLD;
47 pub const LC_DYLD_EXPORTS_TRIE: u32 = 0x33 | LC_REQ_DYLD;
48 pub const LC_MAIN: u32 = 0x28 | LC_REQ_DYLD;
49 pub const LC_LOAD_UPWARD_DYLIB: u32 = 0x23 | LC_REQ_DYLD;
50
51 // Segment flags
52 pub const SG_READ_ONLY: u32 = 0x10;
53
54 // Section type nibble (flags & 0xff)
55 pub const SECTION_TYPE_MASK: u32 = 0x0000_00ff;
56 pub const S_REGULAR: u32 = 0x0;
57 pub const S_ZEROFILL: u32 = 0x1;
58 pub const S_CSTRING_LITERALS: u32 = 0x2;
59 pub const S_4BYTE_LITERALS: u32 = 0x3;
60 pub const S_8BYTE_LITERALS: u32 = 0x4;
61 pub const S_LITERAL_POINTERS: u32 = 0x5;
62 pub const S_NON_LAZY_SYMBOL_POINTERS: u32 = 0x6;
63 pub const S_LAZY_SYMBOL_POINTERS: u32 = 0x7;
64 pub const S_SYMBOL_STUBS: u32 = 0x8;
65 pub const S_MOD_INIT_FUNC_POINTERS: u32 = 0x9;
66 pub const S_MOD_TERM_FUNC_POINTERS: u32 = 0xA;
67 pub const S_COALESCED: u32 = 0xB;
68 pub const S_GB_ZEROFILL: u32 = 0xC;
69 pub const S_INTERPOSING: u32 = 0xD;
70 pub const S_16BYTE_LITERALS: u32 = 0xE;
71 pub const S_THREAD_LOCAL_REGULAR: u32 = 0x11;
72 pub const S_THREAD_LOCAL_ZEROFILL: u32 = 0x12;
73 pub const S_THREAD_LOCAL_VARIABLES: u32 = 0x13;
74 pub const S_THREAD_LOCAL_VARIABLE_POINTERS: u32 = 0x14;
75 pub const S_THREAD_LOCAL_INIT_FUNCTION_POINTERS: u32 = 0x15;
76
77 // Section attribute bits (high byte of flags)
78 pub const S_ATTR_PURE_INSTRUCTIONS: u32 = 0x8000_0000;
79 pub const S_ATTR_NO_TOC: u32 = 0x4000_0000;
80 pub const S_ATTR_STRIP_STATIC_SYMS: u32 = 0x2000_0000;
81 pub const S_ATTR_NO_DEAD_STRIP: u32 = 0x1000_0000;
82 pub const S_ATTR_LIVE_SUPPORT: u32 = 0x0800_0000;
83 pub const S_ATTR_SELF_MODIFYING_CODE: u32 = 0x0400_0000;
84 pub const S_ATTR_DEBUG: u32 = 0x0200_0000;
85 pub const S_ATTR_SOME_INSTRUCTIONS: u32 = 0x0000_0400;
86 pub const S_ATTR_EXT_RELOC: u32 = 0x0000_0200;
87 pub const S_ATTR_LOC_RELOC: u32 = 0x0000_0100;
88
89 // data_in_code_entry kinds
90 pub const DICE_KIND_DATA: u16 = 1;
91 pub const DICE_KIND_JUMP_TABLE8: u16 = 2;
92 pub const DICE_KIND_JUMP_TABLE16: u16 = 3;
93 pub const DICE_KIND_JUMP_TABLE32: u16 = 4;
94 pub const DICE_KIND_ABS_JUMP_TABLE32: u16 = 5;
95
96 // nlist_64 n_type
97 pub const N_STAB: u8 = 0xe0;
98 pub const N_PEXT: u8 = 0x10;
99 pub const N_TYPE: u8 = 0x0e;
100 pub const N_EXT: u8 = 0x01;
101
102 pub const N_UNDF: u8 = 0x0;
103 pub const N_ABS: u8 = 0x2;
104 pub const N_SECT: u8 = 0xe;
105 pub const N_INDR: u8 = 0xa;
106 pub const NO_SECT: u8 = 0;
107
108 // nlist_64 n_desc bits
109 pub const REFERENCED_DYNAMICALLY: u16 = 0x0010;
110 pub const N_NO_DEAD_STRIP: u16 = 0x0020;
111 pub const N_WEAK_REF: u16 = 0x0040;
112 pub const N_WEAK_DEF: u16 = 0x0080;
113 /// Symbol is an alternate entry point into the atom defined by the
114 /// preceding symbol in the same section. Folded into that atom's
115 /// `alt_entries` during atomization.
116 pub const N_ALT_ENTRY: u16 = 0x0200;
117
118 // Indirect symbol table sentinels (<mach-o/loader.h>)
119 pub const INDIRECT_SYMBOL_LOCAL: u32 = 0x8000_0000;
120 pub const INDIRECT_SYMBOL_ABS: u32 = 0x4000_0000;
121
122 // ARM64 relocation kinds
123 pub const ARM64_RELOC_UNSIGNED: u8 = 0;
124 pub const ARM64_RELOC_SUBTRACTOR: u8 = 1;
125 pub const ARM64_RELOC_BRANCH26: u8 = 2;
126 pub const ARM64_RELOC_PAGE21: u8 = 3;
127 pub const ARM64_RELOC_PAGEOFF12: u8 = 4;
128 pub const ARM64_RELOC_GOT_LOAD_PAGE21: u8 = 5;
129 pub const ARM64_RELOC_GOT_LOAD_PAGEOFF12: u8 = 6;
130 pub const ARM64_RELOC_POINTER_TO_GOT: u8 = 7;
131 pub const ARM64_RELOC_TLVP_LOAD_PAGE21: u8 = 8;
132 pub const ARM64_RELOC_TLVP_LOAD_PAGEOFF12: u8 = 9;
133 pub const ARM64_RELOC_ADDEND: u8 = 10;
134
135 // Platforms for LC_BUILD_VERSION
136 pub const PLATFORM_MACOS: u32 = 1;
137 pub const PLATFORM_IOS: u32 = 2;
138
139 // Export trie terminal-node flags (<mach-o/loader.h>)
140 pub const EXPORT_SYMBOL_FLAGS_KIND_MASK: u64 = 0x03;
141 pub const EXPORT_SYMBOL_FLAGS_KIND_REGULAR: u64 = 0x00;
142 pub const EXPORT_SYMBOL_FLAGS_KIND_THREAD_LOCAL: u64 = 0x01;
143 pub const EXPORT_SYMBOL_FLAGS_KIND_ABSOLUTE: u64 = 0x02;
144 pub const EXPORT_SYMBOL_FLAGS_WEAK_DEFINITION: u64 = 0x04;
145 pub const EXPORT_SYMBOL_FLAGS_REEXPORT: u64 = 0x08;
146 pub const EXPORT_SYMBOL_FLAGS_STUB_AND_RESOLVER: u64 = 0x10;
147
148 // Classic dyld bind opcodes / flags (<mach-o/loader.h>)
149 pub const REBASE_TYPE_POINTER: u8 = 1;
150
151 pub const REBASE_OPCODE_MASK: u8 = 0xF0;
152 pub const REBASE_IMMEDIATE_MASK: u8 = 0x0F;
153 pub const REBASE_OPCODE_DONE: u8 = 0x00;
154 pub const REBASE_OPCODE_SET_TYPE_IMM: u8 = 0x10;
155 pub const REBASE_OPCODE_SET_SEGMENT_AND_OFFSET_ULEB: u8 = 0x20;
156 pub const REBASE_OPCODE_ADD_ADDR_ULEB: u8 = 0x30;
157 pub const REBASE_OPCODE_ADD_ADDR_IMM_SCALED: u8 = 0x40;
158 pub const REBASE_OPCODE_DO_REBASE_IMM_TIMES: u8 = 0x50;
159 pub const REBASE_OPCODE_DO_REBASE_ULEB_TIMES: u8 = 0x60;
160 pub const REBASE_OPCODE_DO_REBASE_ADD_ADDR_ULEB: u8 = 0x70;
161 pub const REBASE_OPCODE_DO_REBASE_ULEB_TIMES_SKIPPING_ULEB: u8 = 0x80;
162
163 // Classic dyld bind opcodes / flags (<mach-o/loader.h>)
164 pub const BIND_TYPE_POINTER: u8 = 1;
165
166 pub const BIND_SYMBOL_FLAGS_WEAK_IMPORT: u8 = 0x1;
167
168 pub const BIND_OPCODE_MASK: u8 = 0xF0;
169 pub const BIND_IMMEDIATE_MASK: u8 = 0x0F;
170 pub const BIND_OPCODE_DONE: u8 = 0x00;
171 pub const BIND_OPCODE_SET_DYLIB_ORDINAL_IMM: u8 = 0x10;
172 pub const BIND_OPCODE_SET_DYLIB_ORDINAL_ULEB: u8 = 0x20;
173 pub const BIND_OPCODE_SET_DYLIB_SPECIAL_IMM: u8 = 0x30;
174 pub const BIND_OPCODE_SET_SYMBOL_TRAILING_FLAGS_IMM: u8 = 0x40;
175 pub const BIND_OPCODE_SET_TYPE_IMM: u8 = 0x50;
176 pub const BIND_OPCODE_SET_ADDEND_SLEB: u8 = 0x60;
177 pub const BIND_OPCODE_SET_SEGMENT_AND_OFFSET_ULEB: u8 = 0x70;
178 pub const BIND_OPCODE_ADD_ADDR_ULEB: u8 = 0x80;
179 pub const BIND_OPCODE_DO_BIND: u8 = 0x90;
180 pub const BIND_OPCODE_DO_BIND_ADD_ADDR_ULEB: u8 = 0xA0;
181 pub const BIND_OPCODE_DO_BIND_ADD_ADDR_IMM_SCALED: u8 = 0xB0;
182 pub const BIND_OPCODE_DO_BIND_ULEB_TIMES_SKIPPING_ULEB: u8 = 0xC0;
183