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- /* NDS32-specific support for 32-bit ELF.
- Copyright (C) 2012-2022 Free Software Foundation, Inc.
- Contributed by Andes Technology Corporation.
- This file is part of BFD, the Binary File Descriptor library.
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 3 of the License, or
- (at your option) any later version.
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
- 02110-1301, USA.*/
- #ifndef ELF32_NDS32_H
- #define ELF32_NDS32_H
- #ifdef __cplusplus
- extern "C" {
- #endif
- /* Relocation flags encoded in r_addend. */
- /* Relocation flags for R_NDS32_ERLAX_ENTRY. */
- /* Set if relax on this section is done or disabled. */
- #define R_NDS32_RELAX_ENTRY_DISABLE_RELAX_FLAG (1u << 31)
- /* Optimize for performance. */
- #define R_NDS32_RELAX_ENTRY_OPTIMIZE_FLAG (1u << 30)
- /* Optimize for size. Branch destination 4-byte adjustment
- may be disabled. */
- #define R_NDS32_RELAX_ENTRY_OPTIMIZE_FOR_SPACE_FLAG (1u << 29)
- /* To distinguish the assembly code generated by compiler
- or written manually. */
- #define R_NDS32_RELAX_ENTRY_VERBATIM_FLAG (1u << 28)
- /* Two bits for ICT to comply with files without directive. */
- /* ICT small model. */
- #define R_NDS32_RELAX_ENTRY_ICT_SMALL (0x2u << 4)
- /* ICT large model. */
- #define R_NDS32_RELAX_ENTRY_ICT_LARGE (0x3u << 4)
- /* Mask for get ict bits. */
- #define R_NDS32_RELAX_ENTRY_ICT_MASK (0x3u << 4)
- /* Relocation flags for R_NDS32_INSN16. */
- /* Tag the nop16 can be removed. */
- #define R_NDS32_INSN16_CONVERT_FLAG (1u << 0)
- /* Convert a gp-relative access (e.g., lwi.gp)
- to fp-as-gp access (lwi37.fp).
- This value is used by linker internally only.
- It's fine to change the vlaue. */
- #define R_NDS32_INSN16_FP7U2_FLAG (1u << 1)
- /* Relocation flags for R_NDS32_RELAX_REGION_OMIT_FP_START/END. */
- /* OMIT_FP_FLAG marks the region for applying fp-as-gp
- optimization. */
- #define R_NDS32_RELAX_REGION_OMIT_FP_FLAG (1u << 0)
- /* NOT_OMIT_FP_FLAG is set if this region is not worth
- for fp-as-gp. */
- #define R_NDS32_RELAX_REGION_NOT_OMIT_FP_FLAG (1u << 1)
- /* A Innermost loop region. Some optimizations is suppressed
- in this region due to performance drop. */
- #define R_NDS32_RELAX_REGION_INNERMOST_LOOP_FLAG (1u << 4)
- /* Tag range for LOADSTORE relocation. */
- enum
- {
- NDS32_LOADSTORE_NONE = 0x0,
- NDS32_LOADSTORE_BYTE = 0x1,
- NDS32_LOADSTORE_HALF = 0x2,
- NDS32_LOADSTORE_WORD = 0x4,
- NDS32_LOADSTORE_FLOAT_S = 0x8,
- NDS32_LOADSTORE_FLOAT_D = 0x10,
- NDS32_LOADSTORE_IMM = 0x20
- };
- struct section_id_list_t
- {
- int id;
- struct section_id_list_t *next;
- };
- extern struct section_id_list_t *elf32_nds32_lookup_section_id
- (int, struct section_id_list_t **);
- extern int elf32_nds32_check_relax_group (bfd *, asection *);
- extern int elf32_nds32_unify_relax_group (bfd *, asection *);
- extern int nds32_elf_unify_tls_model (bfd *, asection *, bfd_byte *,
- struct bfd_link_info *);
- extern int nds32_convert_32_to_16 (bfd *, uint32_t, uint16_t *, int *);
- extern int nds32_convert_16_to_32 (bfd *, uint16_t, uint32_t *);
- extern void bfd_elf32_nds32_set_target_option (struct bfd_link_info *,
- int, int, FILE *,
- int, int, int);
- #define nds32_elf_hash_table(p) \
- ((is_elf_hash_table ((p)->hash) \
- && elf_hash_table_id (elf_hash_table (p)) == NDS32_ELF_DATA) \
- ? (struct elf_nds32_link_hash_table *) (p)->hash : NULL)
- #define elf32_nds32_compute_jump_table_size(htab) \
- ((htab)->next_tls_desc_index * 4)
- #define elf32_nds32_local_tlsdesc_gotent(bfd) \
- (elf_nds32_tdata (bfd)->local_tlsdesc_gotent)
- /* Hash table structure for target nds32. There are some members to
- save target options passed from nds32elf.em to bfd. */
- struct elf_nds32_link_hash_table
- {
- struct elf_link_hash_table root;
- /* Target dependent options. */
- int relax_fp_as_gp; /* --mrelax-omit-fp. */
- int eliminate_gc_relocs; /* --meliminate-gc-relocs. */
- FILE *sym_ld_script; /* --mgen-symbol-ld-script=<file>. */
- int hyper_relax; /* Relax for symbol not in RW sections. */
- int tls_desc_trampoline; /* --m[no-]tlsdesc-trampoline. */
- /* Disable if linking a dynamically linked executable. */
- int load_store_relax;
- /* Offset in .plt section of tls_nds32_trampoline. */
- bfd_vma tls_trampoline;
- /* The index of the next unused R_NDS32_TLS_DESC slot in .rel.plt. */
- bfd_vma next_tls_desc_index;
- /* How many R_NDS32_TLS_DESC relocations were generated so far. */
- bfd_vma num_tls_desc;
- /* The amount of space used by the reserved portion of the sgotplt
- section, plus whatever space is used by the jump slots. */
- bfd_vma sgotplt_jump_table_size;
- /* True if the target uses REL relocations. */
- int use_rel;
- };
- #ifdef __cplusplus
- }
- #endif
- #endif /* ELF32_NDS32_H */
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