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35c08157 | 1 | /* NDS32-specific support for 32-bit ELF. |
219d1afa | 2 | Copyright (C) 2012-2018 Free Software Foundation, Inc. |
35c08157 KLC |
3 | Contributed by Andes Technology Corporation. |
4 | ||
5 | This file is part of BFD, the Binary File Descriptor library. | |
6 | ||
7 | This program 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 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program 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 this program; if not, write to the Free Software | |
19 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA | |
20 | 02110-1301, USA.*/ | |
21 | ||
22 | #ifndef ELF32_NDS32_H | |
23 | #define ELF32_NDS32_H | |
24 | ||
1fe0971e TS |
25 | #ifdef __cplusplus |
26 | extern "C" { | |
27 | #endif | |
28 | ||
35c08157 KLC |
29 | /* Relocation flags encoded in r_addend. */ |
30 | ||
31 | /* Relocation flags for R_NDS32_ERLAX_ENTRY. */ | |
32 | ||
33 | /* Set if relax on this section is done or disabled. */ | |
34 | #define R_NDS32_RELAX_ENTRY_DISABLE_RELAX_FLAG (1 << 31) | |
35 | /* Optimize for performance. */ | |
36 | #define R_NDS32_RELAX_ENTRY_OPTIMIZE_FLAG (1 << 30) | |
37 | /* Optimize for size. Branch destination 4-byte adjustment | |
38 | may be disabled. */ | |
39 | #define R_NDS32_RELAX_ENTRY_OPTIMIZE_FOR_SPACE_FLAG (1 << 29) | |
40 | /* To distinguish the assembly code generated by compiler | |
41 | or written manually. */ | |
42 | #define R_NDS32_RELAX_ENTRY_VERBATIM_FLAG (1 << 28) | |
43 | /* EX9 and link-time IFC must be explicitly enabled, so we | |
44 | won't mess up handcraft assembly code. */ | |
45 | /* Enable EX9 optimization for this section. */ | |
46 | #define R_NDS32_RELAX_ENTRY_EX9_FLAG (1 << 2) | |
47 | /* Enable IFC optimization for this section. */ | |
48 | #define R_NDS32_RELAX_ENTRY_IFC_FLAG (1 << 3) | |
e859f655 KLC |
49 | /* Two bits for ICT to comply with files without directive. */ |
50 | /* ICT small model. */ | |
51 | #define R_NDS32_RELAX_ENTRY_ICT_SMALL (0x2 << 4) | |
52 | /* ICT large model. */ | |
53 | #define R_NDS32_RELAX_ENTRY_ICT_LARGE (0x3 << 4) | |
54 | /* Mask for get ict bits. */ | |
55 | #define R_NDS32_RELAX_ENTRY_ICT_MASK (0x3 << 4) | |
35c08157 KLC |
56 | |
57 | ||
58 | /* Relocation flags for R_NDS32_INSN16. */ | |
59 | ||
1c8f6a4d | 60 | /* Tag the nop16 can be removed. */ |
35c08157 KLC |
61 | #define R_NDS32_INSN16_CONVERT_FLAG (1 << 0) |
62 | /* Convert a gp-relative access (e.g., lwi.gp) | |
63 | to fp-as-gp access (lwi37.fp). | |
64 | This value is used by linker internally only. | |
65 | It's fine to change the vlaue. */ | |
66 | #define R_NDS32_INSN16_FP7U2_FLAG (1 << 1) | |
67 | ||
68 | /* Relocation flags for R_NDS32_RELAX_REGION_OMIT_FP_START/END. */ | |
69 | ||
70 | /* OMIT_FP_FLAG marks the region for applying fp-as-gp | |
71 | optimization. */ | |
72 | #define R_NDS32_RELAX_REGION_OMIT_FP_FLAG (1 << 0) | |
73 | /* NOT_OMIT_FP_FLAG is set if this region is not worth | |
74 | for fp-as-gp. */ | |
75 | #define R_NDS32_RELAX_REGION_NOT_OMIT_FP_FLAG (1 << 1) | |
76 | /* Suppress EX9 optimization in the region. */ | |
77 | #define R_NDS32_RELAX_REGION_NO_EX9_FLAG (1 << 2) | |
78 | /* A Innermost loop region. Some optimizations is suppressed | |
79 | in this region due to performance drop. */ | |
80 | #define R_NDS32_RELAX_REGION_INNERMOST_LOOP_FLAG (1 << 4) | |
81 | ||
1c8f6a4d KLC |
82 | /* Tag range for LOADSTORE relocation. */ |
83 | enum | |
84 | { | |
85 | NDS32_LOADSTORE_NONE = 0x0, | |
86 | NDS32_LOADSTORE_BYTE = 0x1, | |
87 | NDS32_LOADSTORE_HALF = 0x2, | |
88 | NDS32_LOADSTORE_WORD = 0x4, | |
89 | NDS32_LOADSTORE_FLOAT_S = 0x8, | |
90 | NDS32_LOADSTORE_FLOAT_D = 0x10, | |
91 | NDS32_LOADSTORE_IMM = 0x20 | |
92 | }; | |
93 | ||
35c08157 KLC |
94 | /* Relax tag for nds32_elf_relax_section, we have to specify which |
95 | optimization do in this round. */ | |
96 | enum | |
97 | { | |
98 | NDS32_RELAX_NONE_ROUND = 0, | |
1c8f6a4d KLC |
99 | NDS32_RELAX_NORMAL_ROUND, |
100 | NDS32_RELAX_JUMP_IFC_ROUND, | |
35c08157 | 101 | NDS32_RELAX_EX9_BUILD_ROUND, |
1c8f6a4d KLC |
102 | NDS32_RELAX_EX9_REPLACE_ROUND, |
103 | NDS32_RELAX_EMPTY_ROUND | |
35c08157 KLC |
104 | }; |
105 | ||
106 | /* Optimization status mask. */ | |
107 | #define NDS32_RELAX_JUMP_IFC_DONE (1 << 0) | |
108 | #define NDS32_RELAX_EX9_DONE (1 << 1) | |
109 | ||
110 | /* Optimization turn on mask. */ | |
111 | #define NDS32_RELAX_JUMP_IFC_ON (1 << 0) | |
112 | #define NDS32_RELAX_EX9_ON (1 << 1) | |
35c08157 KLC |
113 | \f |
114 | extern void nds32_insertion_sort | |
115 | (void *, size_t, size_t, int (*) (const void *, const void *)); | |
116 | ||
07d6d2b8 AM |
117 | extern int nds32_elf_ex9_init (void); |
118 | extern int nds32_convert_32_to_16 (bfd *, uint32_t, uint16_t *, int *); | |
119 | extern int nds32_convert_16_to_32 (bfd *, uint16_t, uint32_t *); | |
120 | extern void bfd_elf32_nds32_set_target_option (struct bfd_link_info *, | |
1c8f6a4d KLC |
121 | int, int, FILE *, int, |
122 | int, int, int, FILE *, | |
123 | FILE *, int, int, | |
124 | bfd_boolean, bfd_boolean); | |
35c08157 KLC |
125 | |
126 | #define nds32_elf_hash_table(info) \ | |
127 | (elf_hash_table_id ((struct elf_link_hash_table *) ((info)->hash)) \ | |
1c8f6a4d KLC |
128 | == NDS32_ELF_DATA ? \ |
129 | ((struct elf_nds32_link_hash_table *) ((info)->hash)) : NULL) | |
35c08157 KLC |
130 | |
131 | /* Hash table structure for target nds32. There are some members to | |
132 | save target options passed from nds32elf.em to bfd. */ | |
133 | ||
134 | struct elf_nds32_link_hash_table | |
135 | { | |
136 | struct elf_link_hash_table root; | |
137 | ||
138 | /* Short-cuts to get to dynamic linker sections. */ | |
35c08157 KLC |
139 | asection *sdynbss; |
140 | asection *srelbss; | |
141 | ||
142 | /* Small local sym to section mapping cache. */ | |
143 | struct sym_cache sym_cache; | |
144 | ||
145 | /* Target dependent options. */ | |
146 | int relax_fp_as_gp; /* --mrelax-omit-fp */ | |
147 | int eliminate_gc_relocs; /* --meliminate-gc-relocs */ | |
148 | FILE *sym_ld_script; /* --mgen-symbol-ld-script=<file> */ | |
149 | /* Disable if linking a dynamically linked executable. */ | |
150 | int load_store_relax; | |
151 | int target_optimize; /* Switch optimization. */ | |
152 | int relax_status; /* Finished optimization. */ | |
153 | int relax_round; /* Going optimization. */ | |
154 | FILE *ex9_export_file; /* --mexport-ex9=<file> */ | |
155 | FILE *ex9_import_file; /* --mimport-ex9=<file> */ | |
156 | int update_ex9_table; /* --mupdate-ex9. */ | |
157 | int ex9_limit; | |
158 | bfd_boolean ex9_loop_aware; /* Ignore ex9 if inside a loop. */ | |
159 | bfd_boolean ifc_loop_aware; /* Ignore ifc if inside a loop. */ | |
160 | }; | |
1fe0971e TS |
161 | |
162 | #ifdef __cplusplus | |
163 | } | |
164 | #endif | |
165 | ||
35c08157 | 166 | #endif |