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