1 /* tc-arc.h - Macros and type defines for the ARC.
2 Copyright (C) 2014-2020 Free Software Foundation, Inc.
4 Contributed by Claudiu Zissulescu (claziss@synopsys.com)
6 This file is part of GAS, the GNU Assembler.
8 GAS is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as
10 published by the Free Software Foundation; either version 3,
11 or (at your option) any later version.
13 GAS is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
16 the GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GAS; see the file COPYING. If not, write to the Free
20 Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
24 /* By convention, you should define this macro in the `.h' file. For
25 example, `tc-m68k.h' defines `TC_M68K'. You might have to use this
26 if it is necessary to add CPU specific code to the object format
30 #include "opcode/arc.h"
32 /* We want local label support. */
33 #define LOCAL_LABELS_FB 1
35 /* This macro is the BFD architecture to pass to
36 `bfd_set_arch_mach'. */
37 #define TARGET_ARCH bfd_arch_arc
39 /* The `extsym - .' expressions can be emitted using PC-relative
43 #define REGISTER_PREFIX '%'
46 #define LITTLE_ENDIAN 1234
49 #define BIG_ENDIAN 4321
51 #ifdef TARGET_BYTES_BIG_ENDIAN
53 # define DEFAULT_TARGET_FORMAT "elf32-bigarc"
54 # define DEFAULT_BYTE_ORDER BIG_ENDIAN
57 /* You should define this macro to be non-zero if the target is big
58 endian, and zero if the target is little endian. */
59 # define TARGET_BYTES_BIG_ENDIAN 0
61 # define DEFAULT_TARGET_FORMAT "elf32-littlearc"
62 # define DEFAULT_BYTE_ORDER LITTLE_ENDIAN
64 #endif /* TARGET_BYTES_BIG_ENDIAN. */
66 /* The endianness of the target format may change based on command
68 extern const char *arc_target_format
;
70 /* This macro is the BFD target name to use when creating the output
71 file. This will normally depend upon the `OBJ_FMT' macro. */
72 #define TARGET_FORMAT arc_target_format
74 /* `md_short_jump_size'
76 `md_create_short_jump'
79 If `WORKING_DOT_WORD' is defined, GAS will not do broken word
80 processing (*note Broken words::.). Otherwise, you should set
81 `md_short_jump_size' to the size of a short jump (a jump that is
82 just long enough to jump around a long jmp) and `md_long_jump_size'
83 to the size of a long jump (a jump that can go anywhere in the
84 function). You should define `md_create_short_jump' to create a
85 short jump around a long jump, and define `md_create_long_jump' to
86 create a long jump. */
87 #define WORKING_DOT_WORD
89 #define LISTING_HEADER "ARC GAS "
91 /* The number of bytes to put into a word in a listing. This affects
92 the way the bytes are clumped together in the listing. For
93 example, a value of 2 might print `1234 5678' where a value of 1
94 would print `12 34 56 78'. The default value is 4. */
95 #define LISTING_WORD_SIZE 2
97 /* If you define this macro, it should return the position from which
98 the PC relative adjustment for a PC relative fixup should be made.
99 On many processors, the base of a PC relative instruction is the
100 next instruction, so this macro would return the length of an
101 instruction, plus the address of the PC relative fixup. The latter
102 can be calculated as fixp->fx_where +
103 fixp->fx_frag->fr_address. */
104 extern long md_pcrel_from_section (struct fix
*, segT
);
105 #define MD_PCREL_FROM_SECTION(FIX, SEC) md_pcrel_from_section (FIX, SEC)
107 /* [ ] is index operator. */
108 #define NEED_INDEX_OPERATOR
110 #define MAX_MEM_FOR_RS_ALIGN_CODE (1+2)
112 /* HANDLE_ALIGN called after all the assembly has been done,
113 so we can fill in all the rs_align_code type frags with
115 #define HANDLE_ALIGN(FRAGP) arc_handle_align (FRAGP)
117 /* Values passed to md_apply_fix3 don't include the symbol value. */
118 #define MD_APPLY_SYM_VALUE(FIX) 0
120 /* No shared lib support, so we don't need to ensure externally
121 visible symbols can be overridden. */
122 #define EXTERN_FORCE_RELOC 0
124 /* You may define this macro to generate a fixup for a data allocation
126 #define TC_CONS_FIX_NEW(FRAG, OFF, LEN, EXP, RELOC) \
127 arc_cons_fix_new ((FRAG), (OFF), (LEN), (EXP), (RELOC))
129 /* We don't want gas to fixup the following program memory related
130 relocations. Check also that fx_addsy is not NULL, in order to
131 make sure that the fixup refers to some sort of label. */
132 #define TC_VALIDATE_FIX(FIXP,SEG,SKIP) \
133 if ((FIXP->fx_r_type == BFD_RELOC_ARC_GOTPC32 \
134 || FIXP->fx_r_type == BFD_RELOC_ARC_PLT32 \
135 || FIXP->fx_r_type == BFD_RELOC_ARC_S25W_PCREL_PLT \
136 || FIXP->fx_r_type == BFD_RELOC_ARC_S25H_PCREL_PLT \
137 || FIXP->fx_r_type == BFD_RELOC_ARC_S21W_PCREL_PLT \
138 || FIXP->fx_r_type == BFD_RELOC_ARC_S21H_PCREL_PLT) \
139 && FIXP->fx_addsy != NULL \
140 && FIXP->fx_subsy == NULL) \
142 symbol_mark_used_in_reloc (FIXP->fx_addsy); \
146 /* BFD_RELOC_ARC_TLS_GD_LD may use fx_subsy to store a label that is
147 later turned into fx_offset. */
148 #define TC_FORCE_RELOCATION_SUB_LOCAL(FIX, SEG) \
149 ((FIX)->fx_r_type == BFD_RELOC_ARC_TLS_GD_LD)
151 #define TC_VALIDATE_FIX_SUB(FIX, SEG) \
152 ((md_register_arithmetic || (SEG) != reg_section) \
153 && ((FIX)->fx_r_type == BFD_RELOC_GPREL32 \
154 || (FIX)->fx_r_type == BFD_RELOC_GPREL16 \
155 || (FIX)->fx_r_type == BFD_RELOC_ARC_TLS_DTPOFF \
156 || (FIX)->fx_r_type == BFD_RELOC_ARC_TLS_DTPOFF_S9 \
157 || TC_FORCE_RELOCATION_SUB_LOCAL (FIX, SEG)))
159 /* We use this to mark the end-loop label. We use this mark for ZOL
161 #define TC_SYMFIELD_TYPE unsigned int
162 #define ARC_GET_FLAG(s) (*symbol_get_tc (s))
163 #define ARC_SET_FLAG(s,v) (*symbol_get_tc (s) |= (v))
165 /* The symbol is a ZOL's end loop label. */
166 #define ARC_FLAG_ZOL (1 << 0)
167 /* The symbol is an AUX register. */
168 #define ARC_FLAG_AUX (1 << 1)
170 /* We use this hook to check the validity of the last to instructions
172 #define tc_frob_label(S) arc_frob_label (S)
174 #define GLOBAL_OFFSET_TABLE_NAME "_GLOBAL_OFFSET_TABLE_"
176 /* We need to take care of not having section relative fixups for the
177 fixups with respect to Position Independent Code. */
178 #define tc_fix_adjustable(FIX) tc_arc_fix_adjustable(FIX)
180 /* This hook is required to parse register names as operands. */
181 #define md_parse_name(name, exp, m, c) arc_parse_name (name, exp)
183 /* Used within frags to pass some information to some relaxation
184 machine dependent values. */
185 #define TC_FRAG_TYPE struct arc_relax_type
187 /* Adjust non PC-rel values at relaxation time. */
188 #define TC_PCREL_ADJUST(F) arc_pcrel_adjust (F)
190 /* Adjust symbol table. */
191 #define obj_adjust_symtab() arc_adjust_symtab ()
193 /* Object attribute hooks. */
194 #define md_end arc_md_end
195 #define CONVERT_SYMBOLIC_ATTRIBUTE(name) arc_convert_symbolic_attribute (name)
196 #ifndef TC_COPY_SYMBOL_ATTRIBUTES
197 #define TC_COPY_SYMBOL_ATTRIBUTES(DEST, SRC) \
198 (arc_copy_symbol_attributes (DEST, SRC))
201 extern void arc_copy_symbol_attributes (symbolS
*, symbolS
*);
202 extern int arc_convert_symbolic_attribute (const char *);
203 extern void arc_md_end (void);
204 extern void arc_adjust_symtab (void);
205 extern int arc_pcrel_adjust (fragS
*);
206 extern bfd_boolean
arc_parse_name (const char *, struct expressionS
*);
207 extern int tc_arc_fix_adjustable (struct fix
*);
208 extern void arc_handle_align (fragS
*);
209 extern void arc_cons_fix_new (fragS
*, int, int, expressionS
*,
210 bfd_reloc_code_real_type
);
211 extern void arc_frob_label (symbolS
*);
212 extern void tc_arc_frame_initial_instructions (void);
213 extern int tc_arc_regname_to_dw2regnum (char *regname
);
215 /* The blink register is r31. */
216 #define DWARF2_DEFAULT_RETURN_COLUMN 31
217 /* Registers are generally saved at negative offsets to the CFA. */
218 #define DWARF2_CIE_DATA_ALIGNMENT (-4)
220 /* We want .cfi_* pseudo-ops for generating unwind info. */
221 #define TARGET_USE_CFIPOP 1
224 #define tc_cfi_frame_initial_instructions tc_arc_frame_initial_instructions
225 #define tc_regname_to_dw2regnum tc_arc_regname_to_dw2regnum
227 /* Define the NOPs. */
228 #define NOP_OPCODE_S 0x000078E0
229 #define NOP_OPCODE_L 0x264A7000 /* mov 0,0. */
231 #define MAX_FLAG_NAME_LENGTH 7
235 /* Name of the parsed flag. */
236 char name
[MAX_FLAG_NAME_LENGTH
+ 1];
238 /* Pointer to arc flags. */
239 const struct arc_flag_operand
*flgp
;
242 extern const relax_typeS md_relax_table
[];
243 #define TC_GENERIC_RELAX_TABLE md_relax_table
245 /* Used to construct instructions at md_convert_frag stage of
247 struct arc_relax_type
249 /* Dictates whether the pc-relativity should be kept in mind when
250 relax_frag is called or whether the pc-relativity should be
251 solved outside of relaxation. For clarification: BL(_S) and
252 B(_S) use pcrel == 1 and ADD with a solvable expression as 3rd
253 operand use pcrel == 0. */
256 /* Expressions that dictate the operands. Used for re-assembling in
258 expressionS tok
[MAX_INSN_ARGS
];
260 /* Number of tok (i.e. number of operands). Used for re-assembling
261 in md_convert_frag. */
264 /* Flags of instruction. Used for re-assembling in
266 struct arc_flags pflags
[MAX_INSN_FLGS
];
268 /* Number of flags. Used for re-assembling in md_convert_frag. */