1 /* NDS32-specific support for 32-bit ELF. 2 Copyright (C) 2012-2024 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 (1u << 31) 35 /* Optimize for performance. */ 36 #define R_NDS32_RELAX_ENTRY_OPTIMIZE_FLAG (1u << 30) 37 /* Optimize for size. Branch destination 4-byte adjustment 38 may be disabled. */ 39 #define R_NDS32_RELAX_ENTRY_OPTIMIZE_FOR_SPACE_FLAG (1u << 29) 40 /* To distinguish the assembly code generated by compiler 41 or written manually. */ 42 #define R_NDS32_RELAX_ENTRY_VERBATIM_FLAG (1u << 28) 43 /* Two bits for ICT to comply with files without directive. */ 44 /* ICT small model. */ 45 #define R_NDS32_RELAX_ENTRY_ICT_SMALL (0x2u << 4) 46 /* ICT large model. */ 47 #define R_NDS32_RELAX_ENTRY_ICT_LARGE (0x3u << 4) 48 /* Mask for get ict bits. */ 49 #define R_NDS32_RELAX_ENTRY_ICT_MASK (0x3u << 4) 50 51 52 /* Relocation flags for R_NDS32_INSN16. */ 53 54 /* Tag the nop16 can be removed. */ 55 #define R_NDS32_INSN16_CONVERT_FLAG (1u << 0) 56 /* Convert a gp-relative access (e.g., lwi.gp) 57 to fp-as-gp access (lwi37.fp). 58 This value is used by linker internally only. 59 It's fine to change the vlaue. */ 60 #define R_NDS32_INSN16_FP7U2_FLAG (1u << 1) 61 62 /* Relocation flags for R_NDS32_RELAX_REGION_OMIT_FP_START/END. */ 63 64 /* OMIT_FP_FLAG marks the region for applying fp-as-gp 65 optimization. */ 66 #define R_NDS32_RELAX_REGION_OMIT_FP_FLAG (1u << 0) 67 /* NOT_OMIT_FP_FLAG is set if this region is not worth 68 for fp-as-gp. */ 69 #define R_NDS32_RELAX_REGION_NOT_OMIT_FP_FLAG (1u << 1) 70 /* A Innermost loop region. Some optimizations is suppressed 71 in this region due to performance drop. */ 72 #define R_NDS32_RELAX_REGION_INNERMOST_LOOP_FLAG (1u << 4) 73 74 /* Tag range for LOADSTORE relocation. */ 75 enum 76 { 77 NDS32_LOADSTORE_NONE = 0x0, 78 NDS32_LOADSTORE_BYTE = 0x1, 79 NDS32_LOADSTORE_HALF = 0x2, 80 NDS32_LOADSTORE_WORD = 0x4, 81 NDS32_LOADSTORE_FLOAT_S = 0x8, 82 NDS32_LOADSTORE_FLOAT_D = 0x10, 83 NDS32_LOADSTORE_IMM = 0x20 84 }; 85 86 struct section_id_list_t 87 { 88 int id; 89 struct section_id_list_t *next; 90 }; 91 92 extern struct section_id_list_t *elf32_nds32_lookup_section_id 93 (int, struct section_id_list_t **); 94 extern int elf32_nds32_check_relax_group (bfd *, asection *); 95 extern int elf32_nds32_unify_relax_group (bfd *, asection *); 96 extern int nds32_elf_unify_tls_model (bfd *, asection *, bfd_byte *, 97 struct bfd_link_info *); 98 99 extern int nds32_convert_32_to_16 (bfd *, uint32_t, uint16_t *, int *); 100 extern int nds32_convert_16_to_32 (bfd *, uint16_t, uint32_t *); 101 extern void bfd_elf32_nds32_set_target_option (struct bfd_link_info *, 102 int, int, FILE *, 103 int, int, int); 104 105 #define nds32_elf_hash_table(p) \ 106 ((is_elf_hash_table ((p)->hash) \ 107 && elf_hash_table_id (elf_hash_table (p)) == NDS32_ELF_DATA) \ 108 ? (struct elf_nds32_link_hash_table *) (p)->hash : NULL) 109 110 #define elf32_nds32_compute_jump_table_size(htab) \ 111 ((htab)->next_tls_desc_index * 4) 112 113 #define elf32_nds32_local_tlsdesc_gotent(bfd) \ 114 (elf_nds32_tdata (bfd)->local_tlsdesc_gotent) 115 116 /* Hash table structure for target nds32. There are some members to 117 save target options passed from nds32elf.em to bfd. */ 118 119 struct elf_nds32_link_hash_table 120 { 121 struct elf_link_hash_table root; 122 123 /* Target dependent options. */ 124 int relax_fp_as_gp; /* --mrelax-omit-fp. */ 125 int eliminate_gc_relocs; /* --meliminate-gc-relocs. */ 126 FILE *sym_ld_script; /* --mgen-symbol-ld-script=<file>. */ 127 int hyper_relax; /* Relax for symbol not in RW sections. */ 128 int tls_desc_trampoline; /* --m[no-]tlsdesc-trampoline. */ 129 /* Disable if linking a dynamically linked executable. */ 130 int load_store_relax; 131 132 /* Offset in .plt section of tls_nds32_trampoline. */ 133 bfd_vma tls_trampoline; 134 135 /* The index of the next unused R_NDS32_TLS_DESC slot in .rel.plt. */ 136 bfd_vma next_tls_desc_index; 137 138 /* How many R_NDS32_TLS_DESC relocations were generated so far. */ 139 bfd_vma num_tls_desc; 140 141 /* The amount of space used by the reserved portion of the sgotplt 142 section, plus whatever space is used by the jump slots. */ 143 bfd_vma sgotplt_jump_table_size; 144 145 /* True if the target uses REL relocations. */ 146 int use_rel; 147 }; 148 149 #ifdef __cplusplus 150 } 151 #endif 152 153 #endif /* ELF32_NDS32_H */ 154
Indexes created Mon Mar 02 05:31:46 UTC 2026