tc-riscv.h revision 1.7 
1/* tc-riscv.h -- header file for tc-riscv.c.
2   Copyright (C) 2011-2024 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
28struct frag;
29struct expressionS;
30
31#ifndef TARGET_BYTES_BIG_ENDIAN
32#define TARGET_BYTES_BIG_ENDIAN 0
33#endif
34
35#define TARGET_ARCH bfd_arch_riscv
36
37#define WORKING_DOT_WORD	1
38#define LOCAL_LABELS_FB 	1
39
40/* Symbols named FAKE_LABEL_NAME are emitted when generating DWARF, so make
41   sure FAKE_LABEL_NAME is printable.  It still must be distinct from any
42   real label name.  So, append a space, which other labels can't contain.  */
43#define FAKE_LABEL_NAME RISCV_FAKE_LABEL_NAME
44/* Changing the special character in FAKE_LABEL_NAME requires changing
45   FAKE_LABEL_CHAR too.  */
46#define FAKE_LABEL_CHAR RISCV_FAKE_LABEL_CHAR
47
48#define md_relax_frag(segment, fragp, stretch) \
49  riscv_relax_frag (segment, fragp, stretch)
50extern int riscv_relax_frag (asection *, struct frag *, long);
51
52#define md_section_align(seg,size)	(size)
53#define md_undefined_symbol(name)	(0)
54#define md_operand(x)
55
56extern bool riscv_frag_align_code (int);
57#define md_do_align(N, FILL, LEN, MAX, LABEL)				\
58  if ((N) != 0 && !(FILL) && !need_pass_2 && subseg_text_p (now_seg))	\
59    {									\
60      if (riscv_frag_align_code (N))					\
61	goto LABEL;							\
62    }
63
64extern void riscv_handle_align (fragS *);
65#define HANDLE_ALIGN riscv_handle_align
66
67#define MAX_MEM_FOR_RS_ALIGN_CODE (3 + 4)
68
69/* The ISA of the target may change based on command-line arguments.  */
70#define TARGET_FORMAT riscv_target_format ()
71extern const char * riscv_target_format (void);
72
73#define md_after_parse_args() riscv_after_parse_args ()
74extern void riscv_after_parse_args (void);
75
76#define md_parse_long_option(arg) riscv_parse_long_option (arg)
77extern int riscv_parse_long_option (const char *);
78
79#define md_pre_output_hook riscv_pre_output_hook ()
80extern void riscv_pre_output_hook (void);
81#define GAS_SORT_RELOCS 1
82
83#define md_end riscv_md_end
84extern void riscv_md_end (void);
85
86/* Let the linker resolve all the relocs due to relaxation.  */
87#define tc_fix_adjustable(fixp) 0
88#define md_allow_local_subtract(l,r,s) 0
89
90/* Values passed to md_apply_fix don't include symbol values.  */
91#define MD_APPLY_SYM_VALUE(FIX) 0
92
93/* Global syms must not be resolved, to support ELF shared libraries.  */
94#define EXTERN_FORCE_RELOC			\
95  (OUTPUT_FLAVOR == bfd_target_elf_flavour)
96
97/* Postpone text-section label subtraction calculation until linking, since
98   linker relaxations might change the deltas.  */
99#define TC_FORCE_RELOCATION_SUB_SAME(FIX, SEG)	\
100  (GENERIC_FORCE_RELOCATION_SUB_SAME (FIX, SEG)	\
101   || ((SEG)->flags & SEC_CODE) != 0)
102#define TC_FORCE_RELOCATION_SUB_LOCAL(FIX, SEG) 1
103#define TC_VALIDATE_FIX_SUB(FIX, SEG) 1
104#define TC_FORCE_RELOCATION_LOCAL(FIX) 1
105#define DIFF_EXPR_OK 1
106
107struct riscv_fix
108{
109  int source_macro;
110};
111
112#define TC_FIX_TYPE struct riscv_fix
113#define TC_INIT_FIX_DATA(FIX) (FIX)->tc_fix_data.source_macro = -1
114
115extern void riscv_pop_insert (void);
116#define md_pop_insert()		riscv_pop_insert ()
117
118#define TARGET_USE_CFIPOP 1
119
120#define tc_cfi_frame_initial_instructions riscv_cfi_frame_initial_instructions
121extern void riscv_cfi_frame_initial_instructions (void);
122
123#define tc_regname_to_dw2regnum tc_riscv_regname_to_dw2regnum
124extern int tc_riscv_regname_to_dw2regnum (char *);
125
126#define DWARF2_DEFAULT_RETURN_COLUMN X_RA
127
128/* Even on RV64, use 4-byte alignment, as F registers may be only 32 bits.  */
129#define DWARF2_CIE_DATA_ALIGNMENT -4
130
131#define elf_tc_final_processing riscv_elf_final_processing
132extern void riscv_elf_final_processing (void);
133
134/* Adjust debug_line after relaxation.  */
135#define DWARF2_USE_FIXED_ADVANCE_PC 1
136
137#define md_parse_name(name, exp, mode, c) \
138  riscv_parse_name (name, exp, mode)
139bool riscv_parse_name (const char *, struct expressionS *, enum expr_mode);
140
141#define md_finish riscv_md_finish
142#define CONVERT_SYMBOLIC_ATTRIBUTE riscv_convert_symbolic_attribute
143
144extern void riscv_md_finish (void);
145extern int riscv_convert_symbolic_attribute (const char *);
146
147/* Set mapping symbol states.  */
148#define md_cons_align(nbytes) riscv_mapping_state (MAP_DATA, 0, 0)
149void riscv_mapping_state (enum riscv_seg_mstate, int, bool);
150
151/* Define target segment type.  */
152#define TC_SEGMENT_INFO_TYPE struct riscv_segment_info_type
153struct riscv_segment_info_type
154{
155  enum riscv_seg_mstate map_state;
156  /* The current mapping symbol with architecture string.  */
157  symbolS *arch_map_symbol;
158};
159
160/* Define target fragment type.  */
161#define TC_FRAG_TYPE struct riscv_frag_type
162struct riscv_frag_type
163{
164  symbolS *first_map_symbol, *last_map_symbol;
165};
166
167#define TC_FRAG_INIT(fragp, max_bytes) riscv_init_frag (fragp, max_bytes)
168extern void riscv_init_frag (struct frag *, int);
169
170#define obj_adjust_symtab() riscv_adjust_symtab ()
171extern void riscv_adjust_symtab (void);
172
173void riscv_elf_copy_symbol_attributes (symbolS *, symbolS *);
174#define OBJ_COPY_SYMBOL_ATTRIBUTES(DEST, SRC)  \
175  riscv_elf_copy_symbol_attributes (DEST, SRC)
176
177#endif /* TC_RISCV */
178