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1 | /* This file is tc-wasm32.h. |
2 | Copyright (C) 2017 Free Software Foundation, Inc. | |
3 | ||
4 | This file is part of GAS, the GNU Assembler. | |
5 | ||
6 | GAS is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 3, or (at your option) | |
9 | any later version. | |
10 | ||
11 | GAS is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GAS; see the file COPYING. If not, write to the Free | |
18 | Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA | |
19 | 02110-1301, USA. */ | |
20 | ||
21 | #define TC_WASM32 | |
22 | #define TARGET_FORMAT "elf32-wasm32" | |
23 | #define TARGET_ARCH bfd_arch_wasm32 | |
24 | #define TARGET_MACH 1 | |
25 | ||
26 | /* WebAssembly is strictly little-endian. */ | |
27 | #define TARGET_BYTES_BIG_ENDIAN 0 | |
28 | #define md_number_to_chars number_to_chars_littleendian | |
29 | ||
30 | #define DIFF_EXPR_OK | |
31 | ||
32 | /* No machine-dependent operand expressions. */ | |
33 | #define md_operand(x) | |
34 | ||
35 | /* No broken word processing. */ | |
36 | #define WORKING_DOT_WORD | |
37 | ||
38 | /* Force some relocations. */ | |
39 | #define EXTERN_FORCE_RELOC 1 | |
40 | extern int wasm32_force_relocation (struct fix *); | |
41 | #define TC_FORCE_RELOCATION(fix) wasm32_force_relocation (fix) | |
42 | #define TC_FORCE_RELOCATION_LOCAL(fix) 1 | |
43 | #define TC_FORCE_RELOCATION_SUB_SAME(fix,seg) wasm32_force_relocation (fix) | |
44 | #define TC_FORCE_RELOCATION_SUB_ABS(fix,seg) wasm32_force_relocation (fix) | |
45 | #define TC_FORCE_RELOCATION_SUB_LOCAL(fix,seg) wasm32_force_relocation (fix) | |
46 | #define TC_VALIDATE_FIX_SUB(fix,seg) wasm32_force_relocation (fix) | |
47 | ||
48 | /* This is ELF, values passed to md_apply_fix don't include the symbol | |
49 | value. */ | |
50 | #define MD_APPLY_SYM_VALUE(FIX) 0 | |
51 | ||
52 | /* PC-relative relocations are relative to the relocation offset. */ | |
53 | #define MD_PCREL_FROM_SECTION(FIX, SEC) 0 | |
54 | ||
55 | #define DWARF2_LINE_MIN_INSN_LENGTH 1 | |
56 | ||
57 | /* WebAssembly uses 32-bit addresses. */ | |
58 | #define TC_ADDRESS_BYTES() 4 | |
59 | #define DWARF2_ADDR_SIZE(bfd) 4 | |
60 | ||
61 | /* Enable cfi directives. */ | |
62 | #define TARGET_USE_CFIPOP 1 | |
63 | ||
64 | /* The stack grows down, and there is no harm in claiming it is only | |
65 | byte aligned. */ | |
66 | #define DWARF2_CIE_DATA_ALIGNMENT -1 | |
67 | ||
68 | /* Define the column that represents the PC. FIXME: this depends on | |
69 | the ABI. */ | |
70 | #define DWARF2_DEFAULT_RETURN_COLUMN 36 | |
71 | ||
72 | /* Define a hook to setup initial CFI state. */ | |
73 | #define tc_cfi_frame_initial_instructions() do { } while (0) | |
74 | ||
75 | #define elf_tc_final_processing() | |
76 | #define md_post_relax_hook | |
77 | #define md_start_line_hook() | |
78 | #define HANDLE_ALIGN(fragP) | |
79 | ||
80 | ||
81 | extern bfd_boolean wasm32_fix_adjustable (struct fix *); | |
82 | #define tc_fix_adjustable(FIX) wasm32_fix_adjustable (FIX) | |
83 | ||
84 | /* Type names for blocks and signatures. */ | |
85 | #define BLOCK_TYPE_NONE 0x40 | |
86 | #define BLOCK_TYPE_I32 0x7f | |
87 | #define BLOCK_TYPE_I64 0x7e | |
88 | #define BLOCK_TYPE_F32 0x7d | |
89 | #define BLOCK_TYPE_F64 0x7c |