1 /* NDS32-specific support for 32-bit ELF. 2 Copyright (C) 2012-2014 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 /* Relocation flags encoded in r_addend. */ 26 27 /* Relocation flags for R_NDS32_ERLAX_ENTRY. */ 28 29 /* Set if relax on this section is done or disabled. */ 30 #define R_NDS32_RELAX_ENTRY_DISABLE_RELAX_FLAG (1 << 31) 31 /* Optimize for performance. */ 32 #define R_NDS32_RELAX_ENTRY_OPTIMIZE_FLAG (1 << 30) 33 /* Optimize for size. Branch destination 4-byte adjustment 34 may be disabled. */ 35 #define R_NDS32_RELAX_ENTRY_OPTIMIZE_FOR_SPACE_FLAG (1 << 29) 36 /* To distinguish the assembly code generated by compiler 37 or written manually. */ 38 #define R_NDS32_RELAX_ENTRY_VERBATIM_FLAG (1 << 28) 39 /* EX9 and link-time IFC must be explicitly enabled, so we 40 won't mess up handcraft assembly code. */ 41 /* Enable EX9 optimization for this section. */ 42 #define R_NDS32_RELAX_ENTRY_EX9_FLAG (1 << 2) 43 /* Enable IFC optimization for this section. */ 44 #define R_NDS32_RELAX_ENTRY_IFC_FLAG (1 << 3) 45 46 47 /* Relocation flags for R_NDS32_INSN16. */ 48 49 /* Tag the nop16 can be removed. */ 50 #define R_NDS32_INSN16_CONVERT_FLAG (1 << 0) 51 /* Convert a gp-relative access (e.g., lwi.gp) 52 to fp-as-gp access (lwi37.fp). 53 This value is used by linker internally only. 54 It's fine to change the vlaue. */ 55 #define R_NDS32_INSN16_FP7U2_FLAG (1 << 1) 56 57 /* Relocation flags for R_NDS32_RELAX_REGION_OMIT_FP_START/END. */ 58 59 /* OMIT_FP_FLAG marks the region for applying fp-as-gp 60 optimization. */ 61 #define R_NDS32_RELAX_REGION_OMIT_FP_FLAG (1 << 0) 62 /* NOT_OMIT_FP_FLAG is set if this region is not worth 63 for fp-as-gp. */ 64 #define R_NDS32_RELAX_REGION_NOT_OMIT_FP_FLAG (1 << 1) 65 /* Suppress EX9 optimization in the region. */ 66 #define R_NDS32_RELAX_REGION_NO_EX9_FLAG (1 << 2) 67 /* A Innermost loop region. Some optimizations is suppressed 68 in this region due to performance drop. */ 69 #define R_NDS32_RELAX_REGION_INNERMOST_LOOP_FLAG (1 << 4) 70 71 /* Tag range for LOADSTORE relocation. */ 72 enum 73 { 74 NDS32_LOADSTORE_NONE = 0x0, 75 NDS32_LOADSTORE_BYTE = 0x1, 76 NDS32_LOADSTORE_HALF = 0x2, 77 NDS32_LOADSTORE_WORD = 0x4, 78 NDS32_LOADSTORE_FLOAT_S = 0x8, 79 NDS32_LOADSTORE_FLOAT_D = 0x10, 80 NDS32_LOADSTORE_IMM = 0x20 81 }; 82 83 /* Relax tag for nds32_elf_relax_section, we have to specify which 84 optimization do in this round. */ 85 enum 86 { 87 NDS32_RELAX_NONE_ROUND = 0, 88 NDS32_RELAX_NORMAL_ROUND, 89 NDS32_RELAX_JUMP_IFC_ROUND, 90 NDS32_RELAX_EX9_BUILD_ROUND, 91 NDS32_RELAX_EX9_REPLACE_ROUND, 92 NDS32_RELAX_EMPTY_ROUND 93 }; 94 95 /* Optimization status mask. */ 96 #define NDS32_RELAX_JUMP_IFC_DONE (1 << 0) 97 #define NDS32_RELAX_EX9_DONE (1 << 1) 98 99 /* Optimization turn on mask. */ 100 #define NDS32_RELAX_JUMP_IFC_ON (1 << 0) 101 #define NDS32_RELAX_EX9_ON (1 << 1) 102 103 extern void nds32_insertion_sort 105 (void *, size_t, size_t, int (*) (const void *, const void *)); 106 107 extern int nds32_elf_ex9_init (void); 108 extern int nds32_convert_32_to_16 (bfd *, uint32_t, uint16_t *, int *); 109 extern int nds32_convert_16_to_32 (bfd *, uint16_t, uint32_t *); 110 extern void bfd_elf32_nds32_set_target_option (struct bfd_link_info *, 111 int, int, FILE *, int, 112 int, int, int, FILE *, 113 FILE *, int, int, 114 bfd_boolean, bfd_boolean); 115 116 #define nds32_elf_hash_table(info) \ 117 (elf_hash_table_id ((struct elf_link_hash_table *) ((info)->hash)) \ 118 == NDS32_ELF_DATA ? \ 119 ((struct elf_nds32_link_hash_table *) ((info)->hash)) : NULL) 120 121 /* Hash table structure for target nds32. There are some members to 122 save target options passed from nds32elf.em to bfd. */ 123 124 struct elf_nds32_link_hash_table 125 { 126 struct elf_link_hash_table root; 127 128 /* Short-cuts to get to dynamic linker sections. */ 129 asection *sgot; 130 asection *sgotplt; 131 asection *srelgot; 132 asection *splt; 133 asection *srelplt; 134 asection *sdynbss; 135 asection *srelbss; 136 137 /* Small local sym to section mapping cache. */ 138 struct sym_cache sym_cache; 139 140 /* Target dependent options. */ 141 int relax_fp_as_gp; /* --mrelax-omit-fp */ 142 int eliminate_gc_relocs; /* --meliminate-gc-relocs */ 143 FILE *sym_ld_script; /* --mgen-symbol-ld-script=<file> */ 144 /* Disable if linking a dynamically linked executable. */ 145 int load_store_relax; 146 int target_optimize; /* Switch optimization. */ 147 int relax_status; /* Finished optimization. */ 148 int relax_round; /* Going optimization. */ 149 FILE *ex9_export_file; /* --mexport-ex9=<file> */ 150 FILE *ex9_import_file; /* --mimport-ex9=<file> */ 151 int update_ex9_table; /* --mupdate-ex9. */ 152 int ex9_limit; 153 bfd_boolean ex9_loop_aware; /* Ignore ex9 if inside a loop. */ 154 bfd_boolean ifc_loop_aware; /* Ignore ifc if inside a loop. */ 155 }; 156 #endif 157
