1 /* This file is tc-wasm32.h. 2 Copyright (C) 2017-2022 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 bool 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 90