gas/config/tc-wasm32.h

   1 /* This file is tc-wasm32.h.
   2    Copyright (C) 2017-2023 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