1 /* NDS32-specific support for 32-bit ELF. 2 Copyright (C) 2012-2018 Free Software Foundation, Inc. 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 25 #ifdef __cplusplus 26 extern "C" { 27 #endif 28 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) 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) 56 57 58 /* Relocation flags for R_NDS32_INSN16. */ 59 60 /* Tag the nop16 can be removed. */ 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 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 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, 99 NDS32_RELAX_NORMAL_ROUND, 100 NDS32_RELAX_JUMP_IFC_ROUND, 101 NDS32_RELAX_EX9_BUILD_ROUND, 102 NDS32_RELAX_EX9_REPLACE_ROUND, 103 NDS32_RELAX_EMPTY_ROUND 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) 113 114 extern void nds32_insertion_sort 115 (void *, size_t, size_t, int (*) (const void *, const void *)); 116 117 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 *, 121 int, int, FILE *, int, 122 int, int, int, FILE *, 123 FILE *, int, int, 124 bfd_boolean, bfd_boolean); 125 126 #define nds32_elf_hash_table(info) \ 127 (elf_hash_table_id ((struct elf_link_hash_table *) ((info)->hash)) \ 128 == NDS32_ELF_DATA ? \ 129 ((struct elf_nds32_link_hash_table *) ((info)->hash)) : NULL) 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. */ 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 }; 161 162 #ifdef __cplusplus 163 } 164 #endif 165 166 #endif 167