1 /* This file is tc-m68k.h
2 Copyright (C) 1987-2023 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 #ifndef TC_M68K_H
22 #define TC_M68K_H
23
24 #define TC_M68K 1
25
26 struct fix;
27
28 #define TARGET_BYTES_BIG_ENDIAN 1
29
30 #define TARGET_FORMAT "elf32-m68k"
31 #define TARGET_ARCH bfd_arch_m68k
32
33 #define tc_comment_chars m68k_comment_chars
34 extern const char *m68k_comment_chars;
35
36 #define LISTING_WORD_SIZE 2 /* A word is 2 bytes */
37 #define LISTING_LHS_WIDTH 2 /* One word on the first line */
38 #define LISTING_LHS_WIDTH_SECOND 2 /* One word on the second line */
39 #define LISTING_LHS_CONT_LINES 4/* And 4 lines max */
40 #define LISTING_HEADER "68K GAS "
41
42 #ifndef REGISTER_PREFIX
43 #define REGISTER_PREFIX '%'
44 #endif
45
46 #ifndef REGISTER_PREFIX_OPTIONAL
47 #define REGISTER_PREFIX_OPTIONAL 0
48 #endif
49
50 extern void m68k_mri_mode_change (int);
51 #define MRI_MODE_CHANGE(i) m68k_mri_mode_change (i)
52
53 extern int m68k_conditional_pseudoop (const pseudo_typeS *);
54 #define tc_conditional_pseudoop(pop) m68k_conditional_pseudoop (pop)
55
56 extern void m68k_frob_label (symbolS *);
57 #define tc_frob_label(sym) m68k_frob_label (sym)
58
59 extern void m68k_flush_pending_output (void);
60 #define md_flush_pending_output() m68k_flush_pending_output ()
61
62 extern void m68k_frob_symbol (symbolS *);
63
64 #define tc_frob_symbol(sym,punt) \
65 do \
66 { \
67 if (S_GET_SEGMENT (sym) == reg_section) \
68 punt = 1; \
69 m68k_frob_symbol (sym); \
70 } \
71 while (0)
72
73 #define NO_RELOC BFD_RELOC_NONE
74 #define RELAX_RELOC_ABS8 BFD_RELOC_8
75 #define RELAX_RELOC_ABS16 BFD_RELOC_16
76 #define RELAX_RELOC_ABS32 BFD_RELOC_32
77 #define RELAX_RELOC_PC8 BFD_RELOC_8_PCREL
78 #define RELAX_RELOC_PC16 BFD_RELOC_16_PCREL
79 #define RELAX_RELOC_PC32 BFD_RELOC_32_PCREL
80
81 #define tc_fix_adjustable(X) tc_m68k_fix_adjustable(X)
82 extern int tc_m68k_fix_adjustable (struct fix *);
83
84 /* Target *-*-elf implies an embedded target. No shared libs.
85 *-*-uclinux also requires special casing to prevent GAS from
86 generating unsupported R_68K_PC16 relocs. */
87 #define EXTERN_FORCE_RELOC \
88 ((strcmp (TARGET_OS, "elf") != 0) && (strcmp (TARGET_OS, "uclinux") != 0))
89
90 /* Values passed to md_apply_fix don't include symbol values. */
91 #define MD_APPLY_SYM_VALUE(FIX) 0
92
93 #define elf_tc_final_processing m68k_elf_final_processing
94 extern void m68k_elf_final_processing (void);
95
96 #define DIFF_EXPR_OK
97
98 extern int m68k_parse_long_option (char *);
99 #define md_parse_long_option m68k_parse_long_option
100
101 #define md_operand(x)
102
103 extern struct relax_type md_relax_table[];
104 #define TC_GENERIC_RELAX_TABLE md_relax_table
105
106 /* We can't do a byte jump to the next instruction, so in that case
107 force word mode by faking AIM. */
108 #define md_prepare_relax_scan(fragP, address, aim, this_state, this_type) \
109 do \
110 { \
111 if (aim == 0 && this_type->rlx_forward == 127) \
112 aim = 128; \
113 } \
114 while (0)
115
116 #define DWARF2_LINE_MIN_INSN_LENGTH 2
117
118 /* We want .cfi_* pseudo-ops for generating unwind info. */
119 #define TARGET_USE_CFIPOP 1
120
121 #define DWARF2_DEFAULT_RETURN_COLUMN 24
122 #define DWARF2_CIE_DATA_ALIGNMENT (-4)
123
124 #define tc_regname_to_dw2regnum tc_m68k_regname_to_dw2regnum
125 extern int tc_m68k_regname_to_dw2regnum (const char *regname);
126
127 #define tc_cfi_frame_initial_instructions tc_m68k_frame_initial_instructions
128 extern void tc_m68k_frame_initial_instructions (void);
129
130 #ifdef TE_UCLINUX
131 /* elf2flt does not honor PT_LOAD's from the executable.
132 .text and .eh_frame sections will not end up in the same segment and so
133 we cannot use PC-relative encoding for CFI. */
134 # define CFI_DIFF_EXPR_OK 0
135
136 /* However, follow compiler's guidance when it specifies encoding for LSDA. */
137 # define CFI_DIFF_LSDA_OK 1
138 #endif
139
140 struct broken_word;
141 #define TC_CHECK_ADJUSTED_BROKEN_DOT_WORD(new_offset, brokw) \
142 tc_m68k_check_adjusted_broken_word ((offsetT) (new_offset), (brokw))
143 extern void tc_m68k_check_adjusted_broken_word (offsetT,
144 struct broken_word *);
145
146 /* We want to warn if any text labels are misaligned. In order to get
147 the right line number, we need to record the line number for each
148 label. */
149 struct m68k_tc_sy
150 {
151 const char *file;
152 unsigned int line;
153 int text;
154 };
155
156 #define TC_SYMFIELD_TYPE struct m68k_tc_sy
157
158 #endif /* TC_M68K_H */