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1 | /* tc-nds32.h -- Header file for tc-nds32.c. |
2 | Copyright (C) 2012-2013 Free Software Foundation, Inc. | |
3 | Contributed by Andes Technology Corporation. | |
4 | ||
5 | This file is part of GAS. | |
6 | ||
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) | |
10 | any later version. | |
11 | ||
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. | |
16 | ||
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 | |
20 | 02110-1301, USA. */ | |
21 | ||
22 | #ifndef TC_NDS32 | |
23 | #define TC_NDS32 | |
24 | ||
25 | #include "bfd_stdint.h" | |
26 | ||
27 | #define LISTING_HEADER \ | |
28 | (target_big_endian ? "NDS32 GAS" : "NDS32 GAS Little Endian") | |
29 | ||
30 | /* The target BFD architecture. */ | |
31 | #define TARGET_ARCH bfd_arch_nds32 | |
32 | ||
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 | |
38 | ||
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 | |
43 | #endif | |
44 | ||
45 | /* This is used to construct expressions out of @GOTOFF, @PLT and @GOT | |
46 | symbols. The relocation type is stored in X_md. */ | |
47 | #define O_PIC_reloc O_md1 | |
48 | ||
49 | /* as.c. */ | |
50 | /* Extend GAS command line option handling capability. */ | |
51 | extern int nds32_parse_option (int, char *); | |
52 | extern void nds32_after_parse_args (void); | |
53 | /* The endianness of the target format may change based on command | |
54 | line arguments. */ | |
55 | extern const char * nds32_target_format (void); | |
56 | ||
57 | #define md_parse_option(optc, optarg) nds32_parse_option (optc, optarg) | |
58 | #define md_after_parse_args() nds32_after_parse_args () | |
59 | #define TARGET_FORMAT nds32_target_format() | |
60 | ||
61 | /* expr.c */ | |
62 | extern int nds32_parse_name (char const *, expressionS *, enum expr_mode, char *); | |
63 | extern bfd_boolean nds32_allow_local_subtract (expressionS *, expressionS *, segT); | |
64 | #define md_parse_name(name, exprP, mode, nextcharP) \ | |
65 | nds32_parse_name (name, exprP, mode, nextcharP) | |
66 | #define md_allow_local_subtract(lhs,rhs,sect) nds32_allow_local_subtract (lhs, rhs, sect) | |
67 | ||
68 | /* dwarf2dbg.c. */ | |
69 | #define DWARF2_USE_FIXED_ADVANCE_PC 1 | |
70 | ||
71 | /* write.c. */ | |
72 | extern long nds32_pcrel_from_section (struct fix *, segT); | |
73 | extern bfd_boolean nds32_fix_adjustable (struct fix *); | |
74 | extern void nds32_frob_file (void); | |
75 | extern void nds32_post_relax_hook (void); | |
76 | extern void nds32_frob_file_before_fix (void); | |
77 | extern void elf_nds32_final_processing (void); | |
78 | extern int nds32_validate_fix_sub (struct fix *, segT); | |
79 | extern int nds32_force_relocation (struct fix *); | |
80 | extern void nds32_set_section_relocs (asection *, arelent ** , unsigned int); | |
81 | ||
82 | /* Fill in rs_align_code fragments. TODO: Review this. */ | |
83 | extern void nds32_handle_align (fragS *); | |
84 | extern int nds32_relax_frag (segT, fragS *, long); | |
85 | extern int tc_nds32_regname_to_dw2regnum (char *); | |
86 | extern void tc_nds32_frame_initial_instructions (void); | |
87 | ||
88 | #define MD_PCREL_FROM_SECTION(fix, sect) nds32_pcrel_from_section (fix, sect) | |
89 | #define TC_FINALIZE_SYMS_BEFORE_SIZE_SEG 0 | |
90 | #define tc_fix_adjustable(FIX) nds32_fix_adjustable (FIX) | |
91 | #define md_apply_fix(fixP, addn, seg) nds32_apply_fix (fixP, addn, seg) | |
92 | #define md_post_relax_hook nds32_post_relax_hook () | |
93 | #define tc_frob_file_before_fix() nds32_frob_file_before_fix () | |
94 | #define elf_tc_final_processing() elf_nds32_final_processing () | |
95 | /* For DIFF relocations. The default behavior is inconsistent with the | |
96 | asm internal document. */ | |
97 | #define TC_FORCE_RELOCATION_SUB_SAME(FIX, SEC) \ | |
98 | (! SEG_NORMAL (SEC) || TC_FORCE_RELOCATION (FIX)) | |
99 | #define TC_FORCE_RELOCATION(fix) nds32_force_relocation (fix) | |
100 | #define TC_VALIDATE_FIX_SUB(FIX,SEG) nds32_validate_fix_sub (FIX,SEG) | |
101 | #define SET_SECTION_RELOCS(sec, relocs, n) nds32_set_section_relocs (sec, relocs, n) | |
102 | /* Values passed to md_apply_fix don't include the symbol value. */ | |
103 | #define MD_APPLY_SYM_VALUE(FIX) 0 | |
104 | #define HANDLE_ALIGN(f) nds32_handle_align (f) | |
105 | #undef DIFF_EXPR_OK /* They should be fixed in linker. */ | |
106 | #define md_relax_frag(segment, fragP, stretch) nds32_relax_frag (segment, fragP, stretch) | |
107 | #define WORKING_DOT_WORD /* We don't need to handle .word strangely. */ | |
108 | /* Using to chain fixup with previous fixup. */ | |
109 | #define TC_FIX_TYPE struct fix * | |
110 | #define TC_INIT_FIX_DATA(fixP) \ | |
111 | do \ | |
112 | { \ | |
113 | fixP->tc_fix_data = NULL; \ | |
114 | } \ | |
115 | while (0) | |
116 | ||
117 | /* read.c. */ | |
118 | /* Extend GAS macro handling capability. */ | |
119 | extern void nds32_macro_start (void); | |
120 | extern void nds32_macro_end (void); | |
121 | extern void nds32_macro_info (void *); | |
122 | extern void nds32_start_line_hook (void); | |
123 | extern void nds32_elf_section_change_hook (void); | |
124 | extern void md_begin (void); | |
125 | extern void md_end (void); | |
126 | extern int nds32_start_label (int, int); | |
127 | extern void nds32_cleanup (void); | |
128 | extern void nds32_flush_pending_output (void); | |
129 | extern void nds32_cons_align (int); | |
130 | extern void nds32_check_label (symbolS *); | |
131 | extern void nds32_frob_label (symbolS *); | |
132 | extern void nds32_pre_do_align (int, char *, int, int); | |
133 | extern void nds32_do_align (int); | |
134 | ||
135 | #define md_macro_start() nds32_macro_start () | |
136 | #define md_macro_end() nds32_macro_end () | |
137 | #define md_macro_info(args) nds32_macro_info (args) | |
138 | #define TC_START_LABEL(C, S, STR) (C == ':' && nds32_start_label (0, 0)) | |
139 | #define tc_check_label(label) nds32_check_label (label) | |
140 | #define tc_frob_label(label) nds32_frob_label (label) | |
141 | #define md_end md_end | |
142 | #define md_start_line_hook() nds32_start_line_hook () | |
143 | #define md_cons_align(n) nds32_cons_align (n) | |
144 | /* COLE: TODO: Review md_do_align. */ | |
145 | #define md_do_align(N, FILL, LEN, MAX, LABEL) \ | |
146 | nds32_pre_do_align (N, FILL, LEN, MAX); \ | |
147 | if ((N) > 1 && (subseg_text_p (now_seg) \ | |
148 | || strncmp (now_seg->name, ".gcc_except_table", sizeof(".gcc_except_table") - 1) == 0)) \ | |
149 | nds32_do_align (N); \ | |
150 | goto LABEL; | |
151 | #define md_elf_section_change_hook() nds32_elf_section_change_hook () | |
152 | #define md_flush_pending_output() nds32_flush_pending_output () | |
153 | #define md_cleanup() nds32_cleanup () | |
154 | #define LOCAL_LABELS_FB 1 /* Permit temporary numeric labels. */ | |
155 | ||
156 | /* frags.c. */ | |
157 | struct nds32_frag_type | |
158 | { | |
159 | relax_substateT flag; | |
160 | struct nds32_opcode *opcode; | |
161 | uint32_t insn; | |
162 | /* To Save previos label fixup if existence. */ | |
163 | struct fix *fixup; | |
164 | }; | |
165 | ||
166 | extern void nds32_frag_init (fragS *); | |
167 | ||
168 | #define TC_FRAG_TYPE struct nds32_frag_type | |
169 | #define TC_FRAG_INIT(fragP) nds32_frag_init (fragP) | |
170 | ||
171 | /* CFI directive. */ | |
172 | extern void nds32_elf_frame_initial_instructions (void); | |
173 | extern int tc_nds32_regname_to_dw2regnum (char *); | |
174 | ||
175 | #define TARGET_USE_CFIPOP 1 | |
176 | #define DWARF2_DEFAULT_RETURN_COLUMN 30 | |
177 | #define DWARF2_CIE_DATA_ALIGNMENT -4 | |
178 | #define DWARF2_LINE_MIN_INSN_LENGTH 2 | |
179 | ||
180 | #define tc_regname_to_dw2regnum tc_nds32_regname_to_dw2regnum | |
181 | #define tc_cfi_frame_initial_instructions tc_nds32_frame_initial_instructions | |
182 | ||
183 | /* COLE: TODO: Review These. They seem to be obsoleted. */ | |
184 | #if 1 | |
185 | #define TC_RELOC_RTSYM_LOC_FIXUP(FIX) \ | |
186 | ((FIX)->fx_addsy == NULL \ | |
187 | || (! S_IS_EXTERNAL ((FIX)->fx_addsy) \ | |
188 | && ! S_IS_WEAK ((FIX)->fx_addsy) \ | |
189 | && S_IS_DEFINED ((FIX)->fx_addsy) \ | |
190 | && ! S_IS_COMMON ((FIX)->fx_addsy))) | |
191 | #define TC_HANDLES_FX_DONE | |
192 | /* This arranges for gas/write.c to not apply a relocation if | |
193 | obj_fix_adjustable() says it is not adjustable. */ | |
194 | #define TC_FIX_ADJUSTABLE(fixP) obj_fix_adjustable (fixP) | |
195 | #endif | |
196 | ||
197 | /* Because linker may relax the code, assemble-time expression | |
198 | optimization is not allowed. */ | |
199 | #define md_allow_eh_opt 0 | |
200 | ||
201 | /* For nds32 relax. */ | |
202 | enum nds32_br_range | |
203 | { | |
204 | BR_RANGE_S256 = 0, | |
205 | BR_RANGE_S16K, | |
206 | BR_RANGE_S64K, | |
207 | BR_RANGE_S16M, | |
208 | BR_RANGE_U4G, | |
209 | BR_RANGE_NUM | |
210 | }; | |
211 | ||
212 | enum nds32_ramp | |
213 | { | |
214 | NDS32_CREATE_LABLE = 1, | |
215 | NDS32_RELAX = 2, | |
216 | NDS32_ORIGIN = 4, | |
217 | NDS32_CONVERT = 8 | |
218 | }; | |
219 | ||
220 | typedef struct nds32_relax_fixup_info | |
221 | { | |
222 | int offset; | |
223 | int size; | |
224 | /* Reverse branch has to jump to the end of instruction pattern. */ | |
225 | int ramp; | |
226 | enum bfd_reloc_code_real r_type; | |
227 | } nds32_relax_fixup_info_t; | |
228 | ||
229 | typedef struct nds32_cond_field | |
230 | { | |
231 | int offset; | |
232 | int bitpos; /* Register position. */ | |
233 | int bitmask; /* Number of register bits. */ | |
234 | } nds32_cond_field_t; | |
235 | ||
236 | /* The max relaxation pattern is 20-bytes including the nop. */ | |
237 | #define NDS32_MAXCHAR 20 | |
238 | /* In current, the max entend number of instruction for one pseudo instruction | |
239 | is 4, but its number of relocation may be 5. */ | |
240 | #define MAX_RELAX_NUM 8 | |
241 | ||
242 | typedef struct nds32_relax_info | |
243 | { | |
244 | /* Opcode for the instruction. */ | |
245 | const char *opcode; | |
246 | enum nds32_br_range br_range; | |
247 | nds32_cond_field_t cond_field[MAX_RELAX_NUM]; /* TODO: Reuse nds32_field? */ | |
248 | /* Code sequences for different branch range. */ | |
249 | uint32_t relax_code_seq[BR_RANGE_NUM][MAX_RELAX_NUM]; | |
250 | nds32_cond_field_t relax_code_condition[BR_RANGE_NUM][MAX_RELAX_NUM]; | |
251 | int relax_code_size[BR_RANGE_NUM]; | |
252 | int relax_branch_isize[BR_RANGE_NUM]; | |
253 | nds32_relax_fixup_info_t relax_fixup[BR_RANGE_NUM][MAX_RELAX_NUM]; | |
254 | } relax_info_t; | |
255 | ||
256 | /* Relocation table. */ | |
257 | struct nds32_relocation_map | |
258 | { | |
259 | unsigned int main_type; | |
260 | /* Number of instructions, {relocations type, instruction type}. */ | |
261 | unsigned int reloc_insn[6][6][3]; | |
262 | }; | |
263 | ||
264 | #endif /* TC_NDS32 */ |