1/* NDS32-specific support for 32-bit ELF.
2   Copyright (C) 2012-2017 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
26extern "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			(1 << 31)
35/* Optimize for performance.  */
36#define R_NDS32_RELAX_ENTRY_OPTIMIZE_FLAG			(1 << 30)
37/* Optimize for size.  Branch destination 4-byte adjustment
38   may be disabled.  */
39#define R_NDS32_RELAX_ENTRY_OPTIMIZE_FOR_SPACE_FLAG		(1 << 29)
40/* To distinguish the assembly code generated by compiler
41   or written manually.  */
42#define R_NDS32_RELAX_ENTRY_VERBATIM_FLAG			(1 << 28)
43/* EX9 and link-time IFC must be explicitly enabled, so we
44   won't mess up handcraft assembly code.  */
45/* Enable EX9 optimization for this section.  */
46#define R_NDS32_RELAX_ENTRY_EX9_FLAG				(1 << 2)
47/* Enable IFC optimization for this section.  */
48#define R_NDS32_RELAX_ENTRY_IFC_FLAG				(1 << 3)
49
50
51/* Relocation flags for R_NDS32_INSN16.  */
52
53/* Tag the nop16 can be removed.  */
54#define R_NDS32_INSN16_CONVERT_FLAG				(1 << 0)
55/* Convert a gp-relative access (e.g., lwi.gp)
56   to fp-as-gp access (lwi37.fp).
57   This value is used by linker internally only.
58   It's fine to change the vlaue.  */
59#define R_NDS32_INSN16_FP7U2_FLAG				(1 << 1)
60
61/* Relocation flags for R_NDS32_RELAX_REGION_OMIT_FP_START/END.  */
62
63/* OMIT_FP_FLAG marks the region for applying fp-as-gp
64   optimization.  */
65#define R_NDS32_RELAX_REGION_OMIT_FP_FLAG			(1 << 0)
66/* NOT_OMIT_FP_FLAG is set if this region is not worth
67   for fp-as-gp.  */
68#define R_NDS32_RELAX_REGION_NOT_OMIT_FP_FLAG			(1 << 1)
69/* Suppress EX9 optimization in the region.  */
70#define R_NDS32_RELAX_REGION_NO_EX9_FLAG			(1 << 2)
71/* A Innermost loop region.  Some optimizations is suppressed
72   in this region due to performance drop.  */
73#define R_NDS32_RELAX_REGION_INNERMOST_LOOP_FLAG		(1 << 4)
74
75/* Tag range for LOADSTORE relocation.  */
76enum
77{
78  NDS32_LOADSTORE_NONE = 0x0,
79  NDS32_LOADSTORE_BYTE = 0x1,
80  NDS32_LOADSTORE_HALF = 0x2,
81  NDS32_LOADSTORE_WORD = 0x4,
82  NDS32_LOADSTORE_FLOAT_S = 0x8,
83  NDS32_LOADSTORE_FLOAT_D = 0x10,
84  NDS32_LOADSTORE_IMM = 0x20
85};
86
87/* Relax tag for nds32_elf_relax_section, we have to specify which
88   optimization do in this round.  */
89enum
90{
91  NDS32_RELAX_NONE_ROUND = 0,
92  NDS32_RELAX_NORMAL_ROUND,
93  NDS32_RELAX_JUMP_IFC_ROUND,
94  NDS32_RELAX_EX9_BUILD_ROUND,
95  NDS32_RELAX_EX9_REPLACE_ROUND,
96  NDS32_RELAX_EMPTY_ROUND
97};
98
99/* Optimization status mask.  */
100#define NDS32_RELAX_JUMP_IFC_DONE	(1 << 0)
101#define NDS32_RELAX_EX9_DONE		(1 << 1)
102
103/* Optimization turn on mask.  */
104#define NDS32_RELAX_JUMP_IFC_ON		(1 << 0)
105#define NDS32_RELAX_EX9_ON		(1 << 1)
106
107extern void nds32_insertion_sort
108  (void *, size_t, size_t, int (*) (const void *, const void *));
109
110extern int         nds32_elf_ex9_init (void);
111extern int         nds32_convert_32_to_16 (bfd *, uint32_t, uint16_t *, int *);
112extern int         nds32_convert_16_to_32 (bfd *, uint16_t, uint32_t *);
113extern void        bfd_elf32_nds32_set_target_option (struct bfd_link_info *,
114						      int, int, FILE *, int,
115						      int, int, int, FILE *,
116						      FILE *, int, int,
117						      bfd_boolean, bfd_boolean);
118
119#define nds32_elf_hash_table(info) \
120  (elf_hash_table_id ((struct elf_link_hash_table *) ((info)->hash)) \
121   == NDS32_ELF_DATA ? \
122   ((struct elf_nds32_link_hash_table *) ((info)->hash)) : NULL)
123
124/* Hash table structure for target nds32.  There are some members to
125   save target options passed from nds32elf.em to bfd.  */
126
127struct elf_nds32_link_hash_table
128{
129  struct elf_link_hash_table root;
130
131  /* Short-cuts to get to dynamic linker sections.  */
132  asection *sdynbss;
133  asection *srelbss;
134
135  /* Small local sym to section mapping cache.  */
136  struct sym_cache sym_cache;
137
138  /* Target dependent options.  */
139  int relax_fp_as_gp;		/* --mrelax-omit-fp  */
140  int eliminate_gc_relocs;	/* --meliminate-gc-relocs  */
141  FILE *sym_ld_script;		/* --mgen-symbol-ld-script=<file>  */
142  /* Disable if linking a dynamically linked executable.  */
143  int load_store_relax;
144  int target_optimize;		/* Switch optimization.  */
145  int relax_status;		/* Finished optimization.  */
146  int relax_round;		/* Going optimization.  */
147  FILE *ex9_export_file;	/* --mexport-ex9=<file>  */
148  FILE *ex9_import_file;	/* --mimport-ex9=<file>  */
149  int update_ex9_table;		/* --mupdate-ex9.  */
150  int ex9_limit;
151  bfd_boolean ex9_loop_aware;	/* Ignore ex9 if inside a loop.  */
152  bfd_boolean ifc_loop_aware;	/* Ignore ifc if inside a loop.  */
153};
154
155#ifdef __cplusplus
156}
157#endif
158
159#endif
160