gas/config/tc-riscv.h

   1 /* tc-riscv.h -- header file for tc-riscv.c.
   2    Copyright (C) 2011-2021 Free Software Foundation, Inc.
   3
   4    Contributed by Andrew Waterman (andrew@sifive.com).
   5    Based on MIPS target.
   6
   7    This file is part of GAS.
   8
   9    GAS is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 3, or (at your option)
  12    any later version.
  13
  14    GAS is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program; see the file COPYING3. If not,
  21    see <http://www.gnu.org/licenses/>.  */
  22
  23 #ifndef TC_RISCV
  24 #define TC_RISCV
  25
  26 #include "opcode/riscv.h"
  27
  28 struct frag;
  29 struct expressionS;
  30
  31 #define TARGET_BYTES_BIG_ENDIAN 0
  32
  33 #define TARGET_ARCH bfd_arch_riscv
  34
  35 #define WORKING_DOT_WORD        1
  36 #define LOCAL_LABELS_FB         1
  37
  38 /* Symbols named FAKE_LABEL_NAME are emitted when generating DWARF, so make
  39    sure FAKE_LABEL_NAME is printable.  It still must be distinct from any
  40    real label name.  So, append a space, which other labels can't contain.  */
  41 #define FAKE_LABEL_NAME RISCV_FAKE_LABEL_NAME
  42 /* Changing the special character in FAKE_LABEL_NAME requires changing
  43    FAKE_LABEL_CHAR too.  */
  44 #define FAKE_LABEL_CHAR RISCV_FAKE_LABEL_CHAR
  45
  46 #define md_relax_frag(segment, fragp, stretch) \
  47   riscv_relax_frag (segment, fragp, stretch)
  48 extern int riscv_relax_frag (asection *, struct frag *, long);
  49
  50 #define md_section_align(seg,size)      (size)
  51 #define md_undefined_symbol(name)       (0)
  52 #define md_operand(x)
  53
  54 extern bfd_boolean riscv_frag_align_code (int);
  55 #define md_do_align(N, FILL, LEN, MAX, LABEL)                           \
  56   if ((N) != 0 && !(FILL) && !need_pass_2 && subseg_text_p (now_seg))   \
  57     {                                                                   \
  58       if (riscv_frag_align_code (N))                                    \
  59         goto LABEL;                                                     \
  60     }
  61
  62 extern void riscv_handle_align (fragS *);
  63 #define HANDLE_ALIGN riscv_handle_align
  64
  65 #define MAX_MEM_FOR_RS_ALIGN_CODE (3 + 4)
  66
  67 /* The ISA of the target may change based on command-line arguments.  */
  68 #define TARGET_FORMAT riscv_target_format()
  69 extern const char * riscv_target_format (void);
  70
  71 #define md_after_parse_args() riscv_after_parse_args()
  72 extern void riscv_after_parse_args (void);
  73
  74 #define md_parse_long_option(arg) riscv_parse_long_option (arg)
  75 extern int riscv_parse_long_option (const char *);
  76
  77 #define md_pre_output_hook riscv_pre_output_hook()
  78 extern void riscv_pre_output_hook (void);
  79
  80 /* Let the linker resolve all the relocs due to relaxation.  */
  81 #define tc_fix_adjustable(fixp) 0
  82 #define md_allow_local_subtract(l,r,s) 0
  83
  84 /* Values passed to md_apply_fix don't include symbol values.  */
  85 #define MD_APPLY_SYM_VALUE(FIX) 0
  86
  87 /* Global syms must not be resolved, to support ELF shared libraries.  */
  88 #define EXTERN_FORCE_RELOC                      \
  89   (OUTPUT_FLAVOR == bfd_target_elf_flavour)
  90
  91 /* Postpone text-section label subtraction calculation until linking, since
  92    linker relaxations might change the deltas.  */
  93 #define TC_FORCE_RELOCATION_SUB_SAME(FIX, SEG)  \
  94   (GENERIC_FORCE_RELOCATION_SUB_SAME (FIX, SEG) \
  95    || ((SEG)->flags & SEC_CODE) != 0)
  96 #define TC_FORCE_RELOCATION_SUB_LOCAL(FIX, SEG) 1
  97 #define TC_VALIDATE_FIX_SUB(FIX, SEG) 1
  98 #define TC_FORCE_RELOCATION_LOCAL(FIX) 1
  99 #define DIFF_EXPR_OK 1
 100
 101 extern void riscv_pop_insert (void);
 102 #define md_pop_insert()         riscv_pop_insert ()
 103
 104 #define TARGET_USE_CFIPOP 1
 105
 106 #define tc_cfi_frame_initial_instructions riscv_cfi_frame_initial_instructions
 107 extern void riscv_cfi_frame_initial_instructions (void);
 108
 109 #define tc_regname_to_dw2regnum tc_riscv_regname_to_dw2regnum
 110 extern int tc_riscv_regname_to_dw2regnum (char *);
 111
 112 #define DWARF2_DEFAULT_RETURN_COLUMN X_RA
 113
 114 /* Even on RV64, use 4-byte alignment, as F registers may be only 32 bits.  */
 115 #define DWARF2_CIE_DATA_ALIGNMENT -4
 116
 117 #define elf_tc_final_processing riscv_elf_final_processing
 118 extern void riscv_elf_final_processing (void);
 119
 120 /* Adjust debug_line after relaxation.  */
 121 #define DWARF2_USE_FIXED_ADVANCE_PC 1
 122
 123 #define md_end riscv_md_end
 124 #define CONVERT_SYMBOLIC_ATTRIBUTE riscv_convert_symbolic_attribute
 125
 126 extern void riscv_md_end (void);
 127 extern int riscv_convert_symbolic_attribute (const char *);
 128
 129 #endif /* TC_RISCV */