1 /* tc-nds32.h -- Header file for tc-nds32.c.
2 Copyright (C) 2012-2016 Free Software Foundation, Inc.
3 Contributed by Andes Technology Corporation.
5 This file is part of GAS.
7 GAS is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3, or (at your option)
12 GAS is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GAS; see the file COPYING. If not, write to the Free
19 Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
25 #include "bfd_stdint.h"
27 #define LISTING_HEADER \
28 (target_big_endian ? "NDS32 GAS" : "NDS32 GAS Little Endian")
30 /* The target BFD architecture. */
31 #define TARGET_ARCH bfd_arch_nds32
33 /* mapping to mach_table[5] */
34 #define ISA_V1 bfd_mach_n1h
35 #define ISA_V2 bfd_mach_n1h_v2
36 #define ISA_V3 bfd_mach_n1h_v3
37 #define ISA_V3M bfd_mach_n1h_v3m
39 /* Default to big endian. Please note that for Andes architecture,
40 instructions are always in big-endian format. */
41 #ifndef TARGET_BYTES_BIG_ENDIAN
42 #define TARGET_BYTES_BIG_ENDIAN 1
46 /* Extend GAS command line option handling capability. */
47 extern int nds32_parse_option (int, const char *);
48 extern void nds32_after_parse_args (void);
49 /* The endianness of the target format may change based on command
51 extern const char * nds32_target_format (void);
53 #define md_parse_option(optc, optarg) nds32_parse_option (optc, optarg)
54 #define md_after_parse_args() nds32_after_parse_args ()
55 #define TARGET_FORMAT nds32_target_format()
58 extern int nds32_parse_name (char const *, expressionS
*, enum expr_mode
, char *);
59 extern bfd_boolean
nds32_allow_local_subtract (expressionS
*, expressionS
*, segT
);
60 #define md_parse_name(name, exprP, mode, nextcharP) \
61 nds32_parse_name (name, exprP, mode, nextcharP)
62 #define md_allow_local_subtract(lhs,rhs,sect) nds32_allow_local_subtract (lhs, rhs, sect)
65 #define DWARF2_USE_FIXED_ADVANCE_PC 1
68 extern long nds32_pcrel_from_section (struct fix
*, segT
);
69 extern bfd_boolean
nds32_fix_adjustable (struct fix
*);
70 extern void nds32_frob_file (void);
71 extern void nds32_post_relax_hook (void);
72 extern void nds32_frob_file_before_fix (void);
73 extern void elf_nds32_final_processing (void);
74 extern int nds32_validate_fix_sub (struct fix
*, segT
);
75 extern int nds32_force_relocation (struct fix
*);
76 extern void nds32_set_section_relocs (asection
*, arelent
** , unsigned int);
78 /* Fill in rs_align_code fragments. TODO: Review this. */
79 extern void nds32_handle_align (fragS
*);
80 extern int nds32_relax_frag (segT
, fragS
*, long);
81 extern int tc_nds32_regname_to_dw2regnum (char *);
82 extern void tc_nds32_frame_initial_instructions (void);
84 #define MD_PCREL_FROM_SECTION(fix, sect) nds32_pcrel_from_section (fix, sect)
85 #define TC_FINALIZE_SYMS_BEFORE_SIZE_SEG 0
86 #define tc_fix_adjustable(FIX) nds32_fix_adjustable (FIX)
87 #define md_apply_fix(fixP, addn, seg) nds32_apply_fix (fixP, addn, seg)
88 #define md_post_relax_hook nds32_post_relax_hook ()
89 #define tc_frob_file_before_fix() nds32_frob_file_before_fix ()
90 #define elf_tc_final_processing() elf_nds32_final_processing ()
91 /* For DIFF relocations. The default behavior is inconsistent with the
92 asm internal document. */
93 #define TC_FORCE_RELOCATION_SUB_SAME(FIX, SEC) \
94 (! SEG_NORMAL (SEC) || TC_FORCE_RELOCATION (FIX))
95 #define TC_FORCE_RELOCATION(fix) nds32_force_relocation (fix)
96 #define TC_VALIDATE_FIX_SUB(FIX,SEG) nds32_validate_fix_sub (FIX,SEG)
97 #define SET_SECTION_RELOCS(sec, relocs, n) nds32_set_section_relocs (sec, relocs, n)
98 /* Values passed to md_apply_fix don't include the symbol value. */
99 #define MD_APPLY_SYM_VALUE(FIX) 0
100 #define HANDLE_ALIGN(f) nds32_handle_align (f)
101 #undef DIFF_EXPR_OK /* They should be fixed in linker. */
102 #define md_relax_frag(segment, fragP, stretch) nds32_relax_frag (segment, fragP, stretch)
103 #define WORKING_DOT_WORD /* We don't need to handle .word strangely. */
104 /* Using to chain fixup with previous fixup. */
105 #define TC_FIX_TYPE struct fix *
106 #define TC_INIT_FIX_DATA(fixP) \
109 fixP->tc_fix_data = NULL; \
114 /* Extend GAS macro handling capability. */
115 extern void nds32_macro_start (void);
116 extern void nds32_macro_end (void);
117 extern void nds32_macro_info (void *);
118 extern void nds32_start_line_hook (void);
119 extern void nds32_elf_section_change_hook (void);
120 extern void md_begin (void);
121 extern void md_end (void);
122 extern int nds32_start_label (int, int);
123 extern void nds32_cleanup (void);
124 extern void nds32_flush_pending_output (void);
125 extern void nds32_cons_align (int);
126 extern void nds32_check_label (symbolS
*);
127 extern void nds32_frob_label (symbolS
*);
128 extern void nds32_pre_do_align (int, char *, int, int);
129 extern void nds32_do_align (int);
131 #define md_macro_start() nds32_macro_start ()
132 #define md_macro_end() nds32_macro_end ()
133 #define md_macro_info(args) nds32_macro_info (args)
134 #define TC_START_LABEL(STR, NUL_CHAR, NEXT_CHAR) \
135 (NEXT_CHAR == ':' && nds32_start_label (0, 0))
136 #define tc_check_label(label) nds32_check_label (label)
137 #define tc_frob_label(label) nds32_frob_label (label)
138 #define md_end md_end
139 #define md_start_line_hook() nds32_start_line_hook ()
140 #define md_cons_align(n) nds32_cons_align (n)
141 /* COLE: TODO: Review md_do_align. */
142 #define md_do_align(N, FILL, LEN, MAX, LABEL) \
143 nds32_pre_do_align (N, FILL, LEN, MAX); \
144 if ((N) > 1 && (subseg_text_p (now_seg) \
145 || strncmp (now_seg->name, ".gcc_except_table", sizeof(".gcc_except_table") - 1) == 0)) \
146 nds32_do_align (N); \
148 #define md_elf_section_change_hook() nds32_elf_section_change_hook ()
149 #define md_flush_pending_output() nds32_flush_pending_output ()
150 #define md_cleanup() nds32_cleanup ()
151 #define LOCAL_LABELS_FB 1 /* Permit temporary numeric labels. */
157 NDS32_FRAG_RELAXABLE
= 0x1,
158 NDS32_FRAG_RELAXED
= 0x2,
159 NDS32_FRAG_BRANCH
= 0x4,
160 NDS32_FRAG_LABEL
= 0x8,
161 NDS32_FRAG_FINAL
= 0x10,
162 NDS32_FRAG_RELAXABLE_BRANCH
= 0x20,
163 NDS32_FRAG_ALIGN
= 0x40
166 struct nds32_frag_type
168 relax_substateT flag
;
169 struct nds32_opcode
*opcode
;
171 /* To Save previos label fixup if existence. */
175 extern void nds32_frag_init (fragS
*);
177 #define TC_FRAG_TYPE struct nds32_frag_type
178 #define TC_FRAG_INIT(fragP) nds32_frag_init (fragP)
181 extern void nds32_elf_frame_initial_instructions (void);
182 extern int tc_nds32_regname_to_dw2regnum (char *);
184 #define TARGET_USE_CFIPOP 1
185 #define DWARF2_DEFAULT_RETURN_COLUMN 30
186 #define DWARF2_CIE_DATA_ALIGNMENT -4
187 #define DWARF2_LINE_MIN_INSN_LENGTH 2
189 #define tc_regname_to_dw2regnum tc_nds32_regname_to_dw2regnum
190 #define tc_cfi_frame_initial_instructions tc_nds32_frame_initial_instructions
192 /* COLE: TODO: Review These. They seem to be obsoleted. */
194 #define TC_RELOC_RTSYM_LOC_FIXUP(FIX) \
195 ((FIX)->fx_addsy == NULL \
196 || (! S_IS_EXTERNAL ((FIX)->fx_addsy) \
197 && ! S_IS_WEAK ((FIX)->fx_addsy) \
198 && S_IS_DEFINED ((FIX)->fx_addsy) \
199 && ! S_IS_COMMON ((FIX)->fx_addsy)))
200 #define TC_HANDLES_FX_DONE
201 /* This arranges for gas/write.c to not apply a relocation if
202 obj_fix_adjustable() says it is not adjustable. */
203 #define TC_FIX_ADJUSTABLE(fixP) obj_fix_adjustable (fixP)
206 /* Because linker may relax the code, assemble-time expression
207 optimization is not allowed. */
208 #define md_allow_eh_opt 0
210 /* For nds32 relax. */
223 NDS32_CREATE_LABEL
= 1,
224 NDS32_RELAX
= (1 << 1), /* Obsolete in the future. */
225 NDS32_ORIGIN
= (1 << 2),
226 NDS32_INSN16
= (1 << 3),
227 NDS32_PTR
= (1 << 4),
228 NDS32_ABS
= (1 << 5),
229 NDS32_HINT
= (1 << 6),
230 NDS32_FIX
= (1 << 7),
231 NDS32_ADDEND
= (1 << 8),
232 NDS32_SYM
= (1 << 9),
233 NDS32_PCREL
= (1 << 10)
236 typedef struct nds32_relax_fixup_info
240 /* Reverse branch has to jump to the end of instruction pattern. */
242 enum bfd_reloc_code_real r_type
;
243 } nds32_relax_fixup_info_t
;
245 typedef struct nds32_cond_field
248 int bitpos
; /* Register position. */
249 int bitmask
; /* Number of register bits. */
250 bfd_boolean signed_extend
;
251 } nds32_cond_field_t
;
253 /* The max relaxation pattern is 20-bytes including the nop. */
254 #define NDS32_MAXCHAR 20
255 /* In current, the max entend number of instruction for one pseudo instruction
256 is 4, but its number of relocation may be 12. */
257 #define MAX_RELAX_NUM 4
258 #define MAX_RELAX_FIX 12
260 typedef struct nds32_relax_info
262 /* Opcode for the instruction. */
264 enum nds32_br_range br_range
;
265 nds32_cond_field_t cond_field
[MAX_RELAX_NUM
]; /* TODO: Reuse nds32_field? */
266 /* Code sequences for different branch range. */
267 uint32_t relax_code_seq
[BR_RANGE_NUM
][MAX_RELAX_NUM
];
268 nds32_cond_field_t relax_code_condition
[BR_RANGE_NUM
][MAX_RELAX_NUM
];
269 unsigned int relax_code_size
[BR_RANGE_NUM
];
270 int relax_branch_isize
[BR_RANGE_NUM
];
271 nds32_relax_fixup_info_t relax_fixup
[BR_RANGE_NUM
][MAX_RELAX_FIX
];
274 enum nds32_relax_hint_type
276 NDS32_RELAX_HINT_NONE
= 0,
281 struct nds32_relax_hint_table
283 enum nds32_relax_hint_type main_type
;
284 unsigned int relax_code_size
;
285 uint32_t relax_code_seq
[MAX_RELAX_NUM
];
286 nds32_relax_fixup_info_t relax_fixup
[MAX_RELAX_FIX
];
289 #endif /* TC_NDS32 */