| 1 | /* This file is tc-wasm32.h. |
| 2 | Copyright (C) 2017-2019 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 |