1 /* TI C6X ELF support for BFD.
2    Copyright (C) 2010-2020 Free Software Foundation, Inc.
3 
4    This file is part of BFD, the Binary File Descriptor library.
5 
6    This program is free software; you can redistribute it and/or modify
7    it under the terms of the GNU General Public License as published by
8    the Free Software Foundation; either version 3 of the License, or
9    (at your option) any later version.
10 
11    This program is distributed in the hope that it will be useful,
12    but WITHOUT ANY WARRANTY; without even the implied warranty of
13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14    GNU General Public License for more details.
15 
16    You should have received a copy of the GNU General Public License
17    along with this program; if not, write to the Free Software
18    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
19    MA 02110-1301, USA.  */
20 
21 #ifndef _ELF_TIC6X_H
22 #define _ELF_TIC6X_H
23 
24 #include "elf/reloc-macros.h"
25 
26 /* Relocation types.  */
27 START_RELOC_NUMBERS (elf_tic6x_reloc_type)
28   RELOC_NUMBER (R_C6000_NONE, 0)
29   RELOC_NUMBER (R_C6000_ABS32, 1)
30   RELOC_NUMBER (R_C6000_ABS16, 2)
31   RELOC_NUMBER (R_C6000_ABS8, 3)
32   RELOC_NUMBER (R_C6000_PCR_S21, 4)
33   RELOC_NUMBER (R_C6000_PCR_S12, 5)
34   RELOC_NUMBER (R_C6000_PCR_S10, 6)
35   RELOC_NUMBER (R_C6000_PCR_S7, 7)
36   RELOC_NUMBER (R_C6000_ABS_S16, 8)
37   RELOC_NUMBER (R_C6000_ABS_L16, 9)
38   RELOC_NUMBER (R_C6000_ABS_H16, 10)
39   RELOC_NUMBER (R_C6000_SBR_U15_B, 11)
40   RELOC_NUMBER (R_C6000_SBR_U15_H, 12)
41   RELOC_NUMBER (R_C6000_SBR_U15_W, 13)
42   RELOC_NUMBER (R_C6000_SBR_S16, 14)
43   RELOC_NUMBER (R_C6000_SBR_L16_B, 15)
44   RELOC_NUMBER (R_C6000_SBR_L16_H, 16)
45   RELOC_NUMBER (R_C6000_SBR_L16_W, 17)
46   RELOC_NUMBER (R_C6000_SBR_H16_B, 18)
47   RELOC_NUMBER (R_C6000_SBR_H16_H, 19)
48   RELOC_NUMBER (R_C6000_SBR_H16_W, 20)
49   RELOC_NUMBER (R_C6000_SBR_GOT_U15_W, 21)
50   RELOC_NUMBER (R_C6000_SBR_GOT_L16_W, 22)
51   RELOC_NUMBER (R_C6000_SBR_GOT_H16_W, 23)
52   RELOC_NUMBER (R_C6000_DSBT_INDEX, 24)
53   RELOC_NUMBER (R_C6000_PREL31, 25)
54   RELOC_NUMBER (R_C6000_COPY, 26)
55   RELOC_NUMBER (R_C6000_JUMP_SLOT, 27)
56   RELOC_NUMBER (R_C6000_EHTYPE, 28)
57   RELOC_NUMBER (R_C6000_PCR_H16, 29)
58   RELOC_NUMBER (R_C6000_PCR_L16, 30)
59   RELOC_NUMBER (R_C6000_ALIGN, 253)
60   RELOC_NUMBER (R_C6000_FPHEAD, 254)
61   RELOC_NUMBER (R_C6000_NOCMP, 255)
62 END_RELOC_NUMBERS (R_TIC6X_max)
63 
64 /* Processor-specific flags.  */
65 
66 /* File contains static relocation information.  */
67 #define EF_C6000_REL		0x1
68 
69 /* Processor-specific section types.  */
70 
71 /* Unwind function table for stack unwinding.  */
72 #define SHT_C6000_UNWIND	0x70000001
73 
74 /* DLL dynamic linking pre-emption map.  */
75 #define SHT_C6000_PREEMPTMAP	0x70000002
76 
77 /* Object file compatibility attributes.  */
78 #define SHT_C6000_ATTRIBUTES	0x70000003
79 
80 /* Intermediate code for link-time optimization.  */
81 #define SHT_TI_ICODE		0x7F000000
82 
83 /* Symbolic cross reference information.  */
84 #define SHT_TI_XREF		0x7F000001
85 
86 /* Reserved.  */
87 #define SHT_TI_HANDLER		0x7F000002
88 
89 /* Compressed data for initializing C variables.  */
90 #define SHT_TI_INITINFO		0x7F000003
91 
92 /* Extended program header attributes.  */
93 #define SHT_TI_PHATTRS		0x7F000004
94 
95 /* Processor specific section indices.  These sections do not actually
96    exist.  Symbols with a st_shndx field corresponding to one of these
97    values have a special meaning.  */
98 
99 /* Small data area common symbol.  */
100 #define SHN_TIC6X_SCOMMON	SHN_LORESERVE
101 
102 /* Processor-specific segment types.  */
103 
104 /* Extended Segment Attributes.  */
105 #define PT_C6000_PHATTR		0x70000000
106 
107 /* Processor-specific dynamic tags.  */
108 
109 /* Undocumented.  */
110 #define DT_C6000_GSYM_OFFSET	0x6000000D
111 
112 /* Undocumented.  */
113 #define DT_C6000_GSTR_OFFSET	0x6000000F
114 
115 /* Statically linked base address of data segment.  */
116 #define DT_C6000_DSBT_BASE	0x70000000
117 
118 /* Number of entries in this module's DSBT.  */
119 #define DT_C6000_DSBT_SIZE	0x70000001
120 
121 /* Undocumented.  */
122 #define DT_C6000_PREEMPTMAP	0x70000002
123 
124 /* The hard-coded DSBT index for this module, if any.  */
125 #define DT_C6000_DSBT_INDEX	0x70000003
126 
127 /* Extended program header attributes.  */
128 
129 /* Terminate a segment.  */
130 #define PHA_NULL		0x0
131 
132 /* Segment's address bound to the final address.  */
133 #define PHA_BOUND		0x1
134 
135 /* Segment cannot be further relocated.  */
136 #define PHA_READONLY		0x2
137 
138 /* Build attributes.  */
139 enum
140   {
141 #define TAG(tag, value) tag = value,
142 #include "elf/tic6x-attrs.h"
143 #undef TAG
144     Tag_C6XABI_last
145   };
146 
147 /* Values for Tag_ISA.  GNU-specific names; the ABI does not specify
148    names for these values.  */
149 enum
150   {
151     C6XABI_Tag_ISA_none = 0,
152     C6XABI_Tag_ISA_C62X = 1,
153     C6XABI_Tag_ISA_C67X = 3,
154     C6XABI_Tag_ISA_C67XP = 4,
155     C6XABI_Tag_ISA_C64X = 6,
156     C6XABI_Tag_ISA_C64XP = 7,
157     C6XABI_Tag_ISA_C674X = 8
158   };
159 
160 /* Special section names.  */
161 #define ELF_STRING_C6000_unwind           ".c6xabi.exidx"
162 #define ELF_STRING_C6000_unwind_info      ".c6xabi.extab"
163 #define ELF_STRING_C6000_unwind_once      ".gnu.linkonce.c6xabi.exidx."
164 #define ELF_STRING_C6000_unwind_info_once ".gnu.linkonce.c6xabi.extab."
165 
166 #endif /* _ELF_TIC6X_H */
167