1/* This file is tc-m68k.h
2   Copyright (C) 1987-2017 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_M68K 1
22
23struct fix;
24
25#define TARGET_BYTES_BIG_ENDIAN 1
26
27#ifdef OBJ_AOUT
28#ifdef TE_SUN3
29#define TARGET_FORMAT "a.out-sunos-big"
30#endif
31#ifdef TE_NetBSD
32#define TARGET_FORMAT "a.out-m68k-netbsd"
33#endif
34#ifdef TE_LINUX
35#define TARGET_FORMAT "a.out-m68k-linux"
36#endif
37#ifndef TARGET_FORMAT
38#define TARGET_FORMAT "a.out-zero-big"
39#endif
40#endif
41
42#ifdef OBJ_ELF
43#define TARGET_FORMAT "elf32-m68k"
44#endif
45
46#ifdef TE_APOLLO
47#define COFF_MAGIC		APOLLOM68KMAGIC
48#define COFF_AOUTHDR_MAGIC	APOLLO_COFF_VERSION_NUMBER
49#undef OBJ_COFF_OMIT_OPTIONAL_HEADER
50#endif
51
52#ifdef TE_AUX
53#define TARGET_FORMAT		"coff-m68k-aux"
54#endif
55#ifdef TE_DELTA
56#define TARGET_FORMAT		"coff-m68k-sysv"
57#endif
58
59#ifndef COFF_MAGIC
60#define COFF_MAGIC MC68MAGIC
61#endif
62#define TARGET_ARCH bfd_arch_m68k
63
64#define tc_comment_chars m68k_comment_chars
65extern const char *m68k_comment_chars;
66
67#define LISTING_WORD_SIZE 2	/* A word is 2 bytes */
68#define LISTING_LHS_WIDTH 2	/* One word on the first line */
69#define LISTING_LHS_WIDTH_SECOND 2	/* One word on the second line */
70#define LISTING_LHS_CONT_LINES 4/* And 4 lines max */
71#define LISTING_HEADER "68K GAS "
72
73#ifndef REGISTER_PREFIX
74#define REGISTER_PREFIX '%'
75#endif
76
77#if !defined (REGISTER_PREFIX_OPTIONAL)
78#if defined (M68KCOFF) || defined (OBJ_ELF)
79#define REGISTER_PREFIX_OPTIONAL 0
80#else /* ! (COFF || ELF) */
81#define REGISTER_PREFIX_OPTIONAL 1
82#endif /* ! (COFF || ELF) */
83#endif /* not def REGISTER_PREFIX and not def OPTIONAL_REGISTER_PREFIX */
84
85#ifdef TE_DELTA
86/* On the Delta, `%' can occur within a label name, but not as the
87   initial character.  */
88#define LEX_PCT LEX_NAME
89/* On the Delta, `~' can start a label name, but is converted to '.'.  */
90#define LEX_TILDE LEX_BEGIN_NAME
91#define tc_canonicalize_symbol_name(s) ((*(s) == '~' ? *(s) = '.' : '.'), s)
92/* On the Delta, dots are not required before pseudo-ops.  */
93#define NO_PSEUDO_DOT 1
94#endif
95
96extern void m68k_mri_mode_change (int);
97#define MRI_MODE_CHANGE(i) m68k_mri_mode_change (i)
98
99extern int m68k_conditional_pseudoop (pseudo_typeS *);
100#define tc_conditional_pseudoop(pop) m68k_conditional_pseudoop (pop)
101
102extern void m68k_frob_label (symbolS *);
103#define tc_frob_label(sym) m68k_frob_label (sym)
104
105extern void m68k_flush_pending_output (void);
106#define md_flush_pending_output() m68k_flush_pending_output ()
107
108extern void m68k_frob_symbol (symbolS *);
109
110#define tc_frob_symbol(sym,punt)				\
111do								\
112  {								\
113    if (S_GET_SEGMENT (sym) == reg_section)			\
114      punt = 1;							\
115    m68k_frob_symbol (sym);					\
116  }								\
117while (0)
118
119#define NO_RELOC BFD_RELOC_NONE
120#define RELAX_RELOC_ABS8  BFD_RELOC_8
121#define RELAX_RELOC_ABS16 BFD_RELOC_16
122#define RELAX_RELOC_ABS32 BFD_RELOC_32
123#define RELAX_RELOC_PC8   BFD_RELOC_8_PCREL
124#define RELAX_RELOC_PC16  BFD_RELOC_16_PCREL
125#define RELAX_RELOC_PC32  BFD_RELOC_32_PCREL
126
127#ifdef OBJ_ELF
128#define tc_fix_adjustable(X) tc_m68k_fix_adjustable(X)
129extern int tc_m68k_fix_adjustable (struct fix *);
130
131/* Target *-*-elf implies an embedded target.  No shared libs.
132   *-*-uclinux also requires special casing to prevent GAS from
133   generating unsupported R_68K_PC16 relocs.  */
134#define EXTERN_FORCE_RELOC \
135  ((strcmp (TARGET_OS, "elf") != 0) && (strcmp (TARGET_OS, "uclinux") != 0))
136
137/* Values passed to md_apply_fix don't include symbol values.  */
138#define MD_APPLY_SYM_VALUE(FIX) 0
139
140#define elf_tc_final_processing m68k_elf_final_processing
141extern void m68k_elf_final_processing (void);
142#endif
143
144#define DIFF_EXPR_OK
145
146extern int m68k_parse_long_option (char *);
147#define md_parse_long_option m68k_parse_long_option
148
149#define md_operand(x)
150
151#define TARGET_ARCH bfd_arch_m68k
152
153extern struct relax_type md_relax_table[];
154#define TC_GENERIC_RELAX_TABLE md_relax_table
155
156/* We can't do a byte jump to the next instruction, so in that case
157   force word mode by faking AIM.  */
158#define md_prepare_relax_scan(fragP, address, aim, this_state, this_type) \
159  do									  \
160    {								 	  \
161      if (aim == 0 && this_type->rlx_forward == 127)			  \
162        aim = 128;							  \
163    }									  \
164  while (0)
165
166#define DWARF2_LINE_MIN_INSN_LENGTH 2
167
168/* We want .cfi_* pseudo-ops for generating unwind info.  */
169#define TARGET_USE_CFIPOP 1
170
171#define DWARF2_DEFAULT_RETURN_COLUMN 24
172#define DWARF2_CIE_DATA_ALIGNMENT (-4)
173
174#define tc_regname_to_dw2regnum tc_m68k_regname_to_dw2regnum
175extern int tc_m68k_regname_to_dw2regnum (const char *regname);
176
177#define tc_cfi_frame_initial_instructions tc_m68k_frame_initial_instructions
178extern void tc_m68k_frame_initial_instructions (void);
179
180#ifdef TE_UCLINUX
181/* elf2flt does not honor PT_LOAD's from the executable.
182   .text and .eh_frame sections will not end up in the same segment and so
183   we cannot use PC-relative encoding for CFI.  */
184# define CFI_DIFF_EXPR_OK 0
185
186/* However, follow compiler's guidance when it specifies encoding for LSDA.  */
187# define CFI_DIFF_LSDA_OK 1
188#endif
189
190struct broken_word;
191#define TC_CHECK_ADJUSTED_BROKEN_DOT_WORD(new_offset, brokw) \
192  tc_m68k_check_adjusted_broken_word ((offsetT) (new_offset), (brokw))
193extern void tc_m68k_check_adjusted_broken_word (offsetT,
194						struct broken_word *);
195