1 /* tc-arc.h - Macros and type defines for the ARC.
2 Copyright (C) 2014-2016 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
23 #include "opcode/arc.h"
25 /* By convention, you should define this macro in the `.h' file. For
26 example, `tc-m68k.h' defines `TC_M68K'. You might have to use this
27 if it is necessary to add CPU specific code to the object format
31 /* We want local label support. */
32 #define LOCAL_LABELS_FB 1
34 /* This macro is the BFD architecture to pass to
35 `bfd_set_arch_mach'. */
36 #define TARGET_ARCH bfd_arch_arc
38 /* The `extsym - .' expressions can be emitted using PC-relative
42 #define REGISTER_PREFIX '%'
45 #define LITTLE_ENDIAN 1234
48 #define BIG_ENDIAN 4321
50 #ifdef TARGET_BYTES_BIG_ENDIAN
52 # define DEFAULT_TARGET_FORMAT "elf32-bigarc"
53 # define DEFAULT_BYTE_ORDER BIG_ENDIAN
56 /* You should define this macro to be non-zero if the target is big
57 endian, and zero if the target is little endian. */
58 # define TARGET_BYTES_BIG_ENDIAN 0
60 # define DEFAULT_TARGET_FORMAT "elf32-littlearc"
61 # define DEFAULT_BYTE_ORDER LITTLE_ENDIAN
63 #endif /* TARGET_BYTES_BIG_ENDIAN. */
65 /* The endianness of the target format may change based on command
67 extern const char *arc_target_format
;
69 /* This macro is the BFD target name to use when creating the output
70 file. This will normally depend upon the `OBJ_FMT' macro. */
71 #define TARGET_FORMAT arc_target_format
73 /* `md_short_jump_size'
75 `md_create_short_jump'
78 If `WORKING_DOT_WORD' is defined, GAS will not do broken word
79 processing (*note Broken words::.). Otherwise, you should set
80 `md_short_jump_size' to the size of a short jump (a jump that is
81 just long enough to jump around a long jmp) and `md_long_jump_size'
82 to the size of a long jump (a jump that can go anywhere in the
83 function). You should define `md_create_short_jump' to create a
84 short jump around a long jump, and define `md_create_long_jump' to
85 create a long jump. */
86 #define WORKING_DOT_WORD
88 #define LISTING_HEADER "ARC GAS "
90 /* The number of bytes to put into a word in a listing. This affects
91 the way the bytes are clumped together in the listing. For
92 example, a value of 2 might print `1234 5678' where a value of 1
93 would print `12 34 56 78'. The default value is 4. */
94 #define LISTING_WORD_SIZE 2
96 /* If you define this macro, it should return the position from which
97 the PC relative adjustment for a PC relative fixup should be made.
98 On many processors, the base of a PC relative instruction is the
99 next instruction, so this macro would return the length of an
100 instruction, plus the address of the PC relative fixup. The latter
101 can be calculated as fixp->fx_where +
102 fixp->fx_frag->fr_address. */
103 extern long md_pcrel_from_section (struct fix
*, segT
);
104 #define MD_PCREL_FROM_SECTION(FIX, SEC) md_pcrel_from_section (FIX, SEC)
106 /* [ ] is index operator. */
107 #define NEED_INDEX_OPERATOR
109 #define MAX_MEM_FOR_RS_ALIGN_CODE (1+2)
111 /* HANDLE_ALIGN called after all the assembly has been done,
112 so we can fill in all the rs_align_code type frags with
114 #define HANDLE_ALIGN(FRAGP) arc_handle_align (FRAGP)
116 /* Values passed to md_apply_fix3 don't include the symbol value. */
117 #define MD_APPLY_SYM_VALUE(FIX) 0
119 /* No shared lib support, so we don't need to ensure externally
120 visible symbols can be overridden. */
121 #define EXTERN_FORCE_RELOC 0
123 /* You may define this macro to generate a fixup for a data allocation
125 #define TC_CONS_FIX_NEW(FRAG, OFF, LEN, EXP, RELOC) \
126 arc_cons_fix_new ((FRAG), (OFF), (LEN), (EXP), (RELOC))
128 /* We don't want gas to fixup the following program memory related
129 relocations. Check also that fx_addsy is not NULL, in order to
130 make sure that the fixup refers to some sort of label. */
131 #define TC_VALIDATE_FIX(FIXP,SEG,SKIP) \
132 if ((FIXP->fx_r_type == BFD_RELOC_ARC_GOTPC32 \
133 || FIXP->fx_r_type == BFD_RELOC_ARC_PLT32 \
134 || FIXP->fx_r_type == BFD_RELOC_ARC_S25W_PCREL_PLT \
135 || FIXP->fx_r_type == BFD_RELOC_ARC_S25H_PCREL_PLT \
136 || FIXP->fx_r_type == BFD_RELOC_ARC_S21W_PCREL_PLT \
137 || FIXP->fx_r_type == BFD_RELOC_ARC_S21H_PCREL_PLT) \
138 && FIXP->fx_addsy != NULL \
139 && FIXP->fx_subsy == NULL) \
141 symbol_mark_used_in_reloc (FIXP->fx_addsy); \
145 /* BFD_RELOC_ARC_TLS_GD_LD may use fx_subsy to store a label that is
146 later turned into fx_offset. */
147 #define TC_FORCE_RELOCATION_SUB_LOCAL(FIX, SEG) \
148 ((FIX)->fx_r_type == BFD_RELOC_ARC_TLS_GD_LD)
150 #define TC_VALIDATE_FIX_SUB(FIX, SEG) \
151 ((md_register_arithmetic || (SEG) != reg_section) \
152 && ((FIX)->fx_r_type == BFD_RELOC_GPREL32 \
153 || (FIX)->fx_r_type == BFD_RELOC_GPREL16 \
154 || (FIX)->fx_r_type == BFD_RELOC_ARC_TLS_DTPOFF \
155 || (FIX)->fx_r_type == BFD_RELOC_ARC_TLS_DTPOFF_S9 \
156 || TC_FORCE_RELOCATION_SUB_LOCAL (FIX, SEG)))
158 /* We use this to mark the end-loop label. We use this mark for ZOL
160 #define TC_SYMFIELD_TYPE unsigned int
161 #define ARC_GET_FLAG(s) (*symbol_get_tc (s))
162 #define ARC_SET_FLAG(s,v) (*symbol_get_tc (s) |= (v))
164 /* The symbol is a ZOL's end loop label. */
165 #define ARC_FLAG_ZOL (1 << 0)
166 /* The symbol is an AUX register. */
167 #define ARC_FLAG_AUX (1 << 1)
169 /* We use this hook to check the validity of the last to instructions
171 #define tc_frob_label(S) arc_frob_label (S)
173 #define GLOBAL_OFFSET_TABLE_NAME "_GLOBAL_OFFSET_TABLE_"
174 #define DYNAMIC_STRUCT_NAME "_DYNAMIC"
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 extern void arc_adjust_symtab (void);
194 extern int arc_pcrel_adjust (fragS
*);
195 extern bfd_boolean
arc_parse_name (const char *, struct expressionS
*);
196 extern int tc_arc_fix_adjustable (struct fix
*);
197 extern void arc_handle_align (fragS
*);
198 extern void arc_cons_fix_new (fragS
*, int, int, expressionS
*,
199 bfd_reloc_code_real_type
);
200 extern void arc_frob_label (symbolS
*);
201 extern void tc_arc_frame_initial_instructions (void);
202 extern int tc_arc_regname_to_dw2regnum (char *regname
);
204 /* The blink register is r31. */
205 #define DWARF2_DEFAULT_RETURN_COLUMN 31
206 /* Registers are generally saved at negative offsets to the CFA. */
207 #define DWARF2_CIE_DATA_ALIGNMENT (-4)
209 /* We want .cfi_* pseudo-ops for generating unwind info. */
210 #define TARGET_USE_CFIPOP 1
213 #define tc_cfi_frame_initial_instructions tc_arc_frame_initial_instructions
214 #define tc_regname_to_dw2regnum tc_arc_regname_to_dw2regnum
216 /* Define the NOPs. */
217 #define NOP_OPCODE_S 0x000078E0
218 #define NOP_OPCODE_L 0x264A7000 /* mov 0,0. */
220 #define MAX_FLAG_NAME_LENGTH 7
224 /* Name of the parsed flag. */
225 char name
[MAX_FLAG_NAME_LENGTH
+ 1];
227 /* Pointer to arc flags. */
228 const struct arc_flag_operand
*flgp
;
231 extern const relax_typeS md_relax_table
[];
232 #define TC_GENERIC_RELAX_TABLE md_relax_table
234 /* Used to construct instructions at md_convert_frag stage of
236 struct arc_relax_type
238 /* Dictates whether the pc-relativity should be kept in mind when
239 relax_frag is called or whether the pc-relativity should be
240 solved outside of relaxation. For clarification: BL(_S) and
241 B(_S) use pcrel == 1 and ADD with a solvable expression as 3rd
242 operand use pcrel == 0. */
245 /* Expressions that dictate the operands. Used for re-assembling in
247 expressionS tok
[MAX_INSN_ARGS
];
249 /* Number of tok (i.e. number of operands). Used for re-assembling
250 in md_convert_frag. */
253 /* Flags of instruction. Used for re-assembling in
255 struct arc_flags pflags
[MAX_INSN_FLGS
];
257 /* Number of flags. Used for re-assembling in md_convert_frag. */