| /* NDS32-specific support for 32-bit ELF. |
| Copyright (C) 2012-2016 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 |
| |
| /* 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 (1 << 31) |
| /* Optimize for performance. */ |
| #define R_NDS32_RELAX_ENTRY_OPTIMIZE_FLAG (1 << 30) |
| /* Optimize for size. Branch destination 4-byte adjustment |
| may be disabled. */ |
| #define R_NDS32_RELAX_ENTRY_OPTIMIZE_FOR_SPACE_FLAG (1 << 29) |
| /* To distinguish the assembly code generated by compiler |
| or written manually. */ |
| #define R_NDS32_RELAX_ENTRY_VERBATIM_FLAG (1 << 28) |
| /* EX9 and link-time IFC must be explicitly enabled, so we |
| won't mess up handcraft assembly code. */ |
| /* Enable EX9 optimization for this section. */ |
| #define R_NDS32_RELAX_ENTRY_EX9_FLAG (1 << 2) |
| /* Enable IFC optimization for this section. */ |
| #define R_NDS32_RELAX_ENTRY_IFC_FLAG (1 << 3) |
| |
| |
| /* Relocation flags for R_NDS32_INSN16. */ |
| |
| /* Tag the nop16 can be removed. */ |
| #define R_NDS32_INSN16_CONVERT_FLAG (1 << 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 (1 << 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 (1 << 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 (1 << 1) |
| /* Suppress EX9 optimization in the region. */ |
| #define R_NDS32_RELAX_REGION_NO_EX9_FLAG (1 << 2) |
| /* A Innermost loop region. Some optimizations is suppressed |
| in this region due to performance drop. */ |
| #define R_NDS32_RELAX_REGION_INNERMOST_LOOP_FLAG (1 << 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 |
| }; |
| |
| /* Relax tag for nds32_elf_relax_section, we have to specify which |
| optimization do in this round. */ |
| enum |
| { |
| NDS32_RELAX_NONE_ROUND = 0, |
| NDS32_RELAX_NORMAL_ROUND, |
| NDS32_RELAX_JUMP_IFC_ROUND, |
| NDS32_RELAX_EX9_BUILD_ROUND, |
| NDS32_RELAX_EX9_REPLACE_ROUND, |
| NDS32_RELAX_EMPTY_ROUND |
| }; |
| |
| /* Optimization status mask. */ |
| #define NDS32_RELAX_JUMP_IFC_DONE (1 << 0) |
| #define NDS32_RELAX_EX9_DONE (1 << 1) |
| |
| /* Optimization turn on mask. */ |
| #define NDS32_RELAX_JUMP_IFC_ON (1 << 0) |
| #define NDS32_RELAX_EX9_ON (1 << 1) |
| |
| extern void nds32_insertion_sort |
| (void *, size_t, size_t, int (*) (const void *, const void *)); |
| |
| extern int nds32_elf_ex9_init (void); |
| 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, int, FILE *, |
| FILE *, int, int, |
| bfd_boolean, bfd_boolean); |
| |
| #define nds32_elf_hash_table(info) \ |
| (elf_hash_table_id ((struct elf_link_hash_table *) ((info)->hash)) \ |
| == NDS32_ELF_DATA ? \ |
| ((struct elf_nds32_link_hash_table *) ((info)->hash)) : NULL) |
| |
| /* 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; |
| |
| /* Short-cuts to get to dynamic linker sections. */ |
| asection *sgot; |
| asection *sgotplt; |
| asection *srelgot; |
| asection *splt; |
| asection *srelplt; |
| asection *sdynbss; |
| asection *srelbss; |
| |
| /* Small local sym to section mapping cache. */ |
| struct sym_cache sym_cache; |
| |
| /* 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> */ |
| /* Disable if linking a dynamically linked executable. */ |
| int load_store_relax; |
| int target_optimize; /* Switch optimization. */ |
| int relax_status; /* Finished optimization. */ |
| int relax_round; /* Going optimization. */ |
| FILE *ex9_export_file; /* --mexport-ex9=<file> */ |
| FILE *ex9_import_file; /* --mimport-ex9=<file> */ |
| int update_ex9_table; /* --mupdate-ex9. */ |
| int ex9_limit; |
| bfd_boolean ex9_loop_aware; /* Ignore ex9 if inside a loop. */ |
| bfd_boolean ifc_loop_aware; /* Ignore ifc if inside a loop. */ |
| }; |
| #endif |