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5191 serge 1
/* PPC64 ELF support for BFD.
2
   Copyright 2003, 2005, 2009, 2010, 2011 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_PPC64_H
22
#define _ELF_PPC64_H
23
 
24
#include "elf/reloc-macros.h"
25
 
26
/* Relocations.  */
27
START_RELOC_NUMBERS (elf_ppc64_reloc_type)
28
  RELOC_NUMBER (R_PPC64_NONE,		     0)
29
  RELOC_NUMBER (R_PPC64_ADDR32,		     1)
30
  RELOC_NUMBER (R_PPC64_ADDR24,		     2)
31
  RELOC_NUMBER (R_PPC64_ADDR16,		     3)
32
  RELOC_NUMBER (R_PPC64_ADDR16_LO,	     4)
33
  RELOC_NUMBER (R_PPC64_ADDR16_HI,	     5)
34
  RELOC_NUMBER (R_PPC64_ADDR16_HA,	     6)
35
  RELOC_NUMBER (R_PPC64_ADDR14,		     7)
36
  RELOC_NUMBER (R_PPC64_ADDR14_BRTAKEN,	     8)
37
  RELOC_NUMBER (R_PPC64_ADDR14_BRNTAKEN,     9)
38
  RELOC_NUMBER (R_PPC64_REL24,		    10)
39
  RELOC_NUMBER (R_PPC64_REL14,		    11)
40
  RELOC_NUMBER (R_PPC64_REL14_BRTAKEN,	    12)
41
  RELOC_NUMBER (R_PPC64_REL14_BRNTAKEN,	    13)
42
  RELOC_NUMBER (R_PPC64_GOT16,		    14)
43
  RELOC_NUMBER (R_PPC64_GOT16_LO,	    15)
44
  RELOC_NUMBER (R_PPC64_GOT16_HI,	    16)
45
  RELOC_NUMBER (R_PPC64_GOT16_HA,	    17)
46
  /* 18 unused.  32-bit reloc is R_PPC_PLTREL24.  */
47
  RELOC_NUMBER (R_PPC64_COPY,		    19)
48
  RELOC_NUMBER (R_PPC64_GLOB_DAT,	    20)
49
  RELOC_NUMBER (R_PPC64_JMP_SLOT,	    21)
50
  RELOC_NUMBER (R_PPC64_RELATIVE,	    22)
51
  /* 23 unused.  32-bit reloc is R_PPC_LOCAL24PC.  */
52
  RELOC_NUMBER (R_PPC64_UADDR32,	    24)
53
  RELOC_NUMBER (R_PPC64_UADDR16,	    25)
54
  RELOC_NUMBER (R_PPC64_REL32,		    26)
55
  RELOC_NUMBER (R_PPC64_PLT32,		    27)
56
  RELOC_NUMBER (R_PPC64_PLTREL32,	    28)
57
  RELOC_NUMBER (R_PPC64_PLT16_LO,	    29)
58
  RELOC_NUMBER (R_PPC64_PLT16_HI,	    30)
59
  RELOC_NUMBER (R_PPC64_PLT16_HA,	    31)
60
  /* 32 unused.  32-bit reloc is R_PPC_SDAREL16.  */
61
  RELOC_NUMBER (R_PPC64_SECTOFF,	    33)
62
  RELOC_NUMBER (R_PPC64_SECTOFF_LO,	    34)
63
  RELOC_NUMBER (R_PPC64_SECTOFF_HI,	    35)
64
  RELOC_NUMBER (R_PPC64_SECTOFF_HA,	    36)
65
  RELOC_NUMBER (R_PPC64_REL30,		    37)
66
  RELOC_NUMBER (R_PPC64_ADDR64,		    38)
67
  RELOC_NUMBER (R_PPC64_ADDR16_HIGHER,	    39)
68
  RELOC_NUMBER (R_PPC64_ADDR16_HIGHERA,	    40)
69
  RELOC_NUMBER (R_PPC64_ADDR16_HIGHEST,	    41)
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  RELOC_NUMBER (R_PPC64_ADDR16_HIGHESTA,    42)
71
  RELOC_NUMBER (R_PPC64_UADDR64,	    43)
72
  RELOC_NUMBER (R_PPC64_REL64,		    44)
73
  RELOC_NUMBER (R_PPC64_PLT64,		    45)
74
  RELOC_NUMBER (R_PPC64_PLTREL64,	    46)
75
  RELOC_NUMBER (R_PPC64_TOC16,		    47)
76
  RELOC_NUMBER (R_PPC64_TOC16_LO,	    48)
77
  RELOC_NUMBER (R_PPC64_TOC16_HI,	    49)
78
  RELOC_NUMBER (R_PPC64_TOC16_HA,	    50)
79
  RELOC_NUMBER (R_PPC64_TOC,		    51)
80
  RELOC_NUMBER (R_PPC64_PLTGOT16,	    52)
81
  RELOC_NUMBER (R_PPC64_PLTGOT16_LO,	    53)
82
  RELOC_NUMBER (R_PPC64_PLTGOT16_HI,	    54)
83
  RELOC_NUMBER (R_PPC64_PLTGOT16_HA,	    55)
84
 
85
  /* The following relocs were added in the 64-bit PowerPC ELF ABI
86
     revision 1.2. */
87
  RELOC_NUMBER (R_PPC64_ADDR16_DS,	    56)
88
  RELOC_NUMBER (R_PPC64_ADDR16_LO_DS,	    57)
89
  RELOC_NUMBER (R_PPC64_GOT16_DS,	    58)
90
  RELOC_NUMBER (R_PPC64_GOT16_LO_DS,	    59)
91
  RELOC_NUMBER (R_PPC64_PLT16_LO_DS,	    60)
92
  RELOC_NUMBER (R_PPC64_SECTOFF_DS,	    61)
93
  RELOC_NUMBER (R_PPC64_SECTOFF_LO_DS,	    62)
94
  RELOC_NUMBER (R_PPC64_TOC16_DS,	    63)
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  RELOC_NUMBER (R_PPC64_TOC16_LO_DS,	    64)
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  RELOC_NUMBER (R_PPC64_PLTGOT16_DS,	    65)
97
  RELOC_NUMBER (R_PPC64_PLTGOT16_LO_DS,	    66)
98
 
99
  /* Relocs added to support TLS.  PowerPC64 ELF ABI revision 1.5.  */
100
  RELOC_NUMBER (R_PPC64_TLS,		    67)
101
  RELOC_NUMBER (R_PPC64_DTPMOD64,	    68)
102
  RELOC_NUMBER (R_PPC64_TPREL16,	    69)
103
  RELOC_NUMBER (R_PPC64_TPREL16_LO,	    70)
104
  RELOC_NUMBER (R_PPC64_TPREL16_HI,	    71)
105
  RELOC_NUMBER (R_PPC64_TPREL16_HA,	    72)
106
  RELOC_NUMBER (R_PPC64_TPREL64,	    73)
107
  RELOC_NUMBER (R_PPC64_DTPREL16,	    74)
108
  RELOC_NUMBER (R_PPC64_DTPREL16_LO,	    75)
109
  RELOC_NUMBER (R_PPC64_DTPREL16_HI,	    76)
110
  RELOC_NUMBER (R_PPC64_DTPREL16_HA,	    77)
111
  RELOC_NUMBER (R_PPC64_DTPREL64,	    78)
112
  RELOC_NUMBER (R_PPC64_GOT_TLSGD16,	    79)
113
  RELOC_NUMBER (R_PPC64_GOT_TLSGD16_LO,	    80)
114
  RELOC_NUMBER (R_PPC64_GOT_TLSGD16_HI,	    81)
115
  RELOC_NUMBER (R_PPC64_GOT_TLSGD16_HA,	    82)
116
  RELOC_NUMBER (R_PPC64_GOT_TLSLD16,	    83)
117
  RELOC_NUMBER (R_PPC64_GOT_TLSLD16_LO,	    84)
118
  RELOC_NUMBER (R_PPC64_GOT_TLSLD16_HI,	    85)
119
  RELOC_NUMBER (R_PPC64_GOT_TLSLD16_HA,	    86)
120
  RELOC_NUMBER (R_PPC64_GOT_TPREL16_DS,	    87)
121
  RELOC_NUMBER (R_PPC64_GOT_TPREL16_LO_DS,  88)
122
  RELOC_NUMBER (R_PPC64_GOT_TPREL16_HI,	    89)
123
  RELOC_NUMBER (R_PPC64_GOT_TPREL16_HA,	    90)
124
  RELOC_NUMBER (R_PPC64_GOT_DTPREL16_DS,    91)
125
  RELOC_NUMBER (R_PPC64_GOT_DTPREL16_LO_DS, 92)
126
  RELOC_NUMBER (R_PPC64_GOT_DTPREL16_HI,    93)
127
  RELOC_NUMBER (R_PPC64_GOT_DTPREL16_HA,    94)
128
  RELOC_NUMBER (R_PPC64_TPREL16_DS,	    95)
129
  RELOC_NUMBER (R_PPC64_TPREL16_LO_DS,	    96)
130
  RELOC_NUMBER (R_PPC64_TPREL16_HIGHER,	    97)
131
  RELOC_NUMBER (R_PPC64_TPREL16_HIGHERA,    98)
132
  RELOC_NUMBER (R_PPC64_TPREL16_HIGHEST,    99)
133
  RELOC_NUMBER (R_PPC64_TPREL16_HIGHESTA,  100)
134
  RELOC_NUMBER (R_PPC64_DTPREL16_DS,	   101)
135
  RELOC_NUMBER (R_PPC64_DTPREL16_LO_DS,	   102)
136
  RELOC_NUMBER (R_PPC64_DTPREL16_HIGHER,   103)
137
  RELOC_NUMBER (R_PPC64_DTPREL16_HIGHERA,  104)
138
  RELOC_NUMBER (R_PPC64_DTPREL16_HIGHEST,  105)
139
  RELOC_NUMBER (R_PPC64_DTPREL16_HIGHESTA, 106)
140
  RELOC_NUMBER (R_PPC64_TLSGD,		   107)
141
  RELOC_NUMBER (R_PPC64_TLSLD,		   108)
142
  RELOC_NUMBER (R_PPC64_TOCSAVE,	   109)
143
 
144
/* Added when HA and HI relocs were changed to report overflows.  */
145
  RELOC_NUMBER (R_PPC64_ADDR16_HIGH,	   110)
146
  RELOC_NUMBER (R_PPC64_ADDR16_HIGHA,	   111)
147
  RELOC_NUMBER (R_PPC64_TPREL16_HIGH,	   112)
148
  RELOC_NUMBER (R_PPC64_TPREL16_HIGHA,	   113)
149
  RELOC_NUMBER (R_PPC64_DTPREL16_HIGH,	   114)
150
  RELOC_NUMBER (R_PPC64_DTPREL16_HIGHA,	   115)
151
 
152
#ifndef RELOC_MACROS_GEN_FUNC
153
/* Fake relocation only used internally by ld.  */
154
  RELOC_NUMBER (R_PPC64_LO_DS_OPT,	   128)
155
#endif
156
/* Support STT_GNU_IFUNC plt calls.  */
157
  RELOC_NUMBER (R_PPC64_JMP_IREL,	   247)
158
  RELOC_NUMBER (R_PPC64_IRELATIVE,	   248)
159
 
160
/* These are GNU extensions used in PIC code sequences.  */
161
  RELOC_NUMBER (R_PPC64_REL16,		   249)
162
  RELOC_NUMBER (R_PPC64_REL16_LO,	   250)
163
  RELOC_NUMBER (R_PPC64_REL16_HI,	   251)
164
  RELOC_NUMBER (R_PPC64_REL16_HA,	   252)
165
 
166
  /* These are GNU extensions to enable C++ vtable garbage collection.  */
167
  RELOC_NUMBER (R_PPC64_GNU_VTINHERIT,	   253)
168
  RELOC_NUMBER (R_PPC64_GNU_VTENTRY,	   254)
169
 
170
END_RELOC_NUMBERS (R_PPC64_max)
171
 
172
#define IS_PPC64_TLS_RELOC(R)						\
173
  (((R) >= R_PPC64_TLS && (R) <= R_PPC64_DTPREL16_HIGHESTA)		\
174
   || ((R) >= R_PPC64_TPREL16_HIGH && (R) <= R_PPC64_DTPREL16_HIGHA))
175
 
176
 
177
/* e_flags bits specifying ABI.
178
   1 for original function descriptor using ABI,
179
   2 for revised ABI without function descriptors,
180
 
181
#define EF_PPC64_ABI	3
182
 
183
/* The ELFv2 ABI uses three bits in the symbol st_other field of a
184
   function definition to specify the number of instructions between a
185
   function's global entry point and local entry point.
186
   The global entry point is used when it is necessary to set up the
187
   toc pointer (r2) for the function.  Callers must enter the global
188
   entry point with r12 set to the global entry point address.  On
189
   return from the function, r2 may have a different value to that
190
   which it had on entry.
191
   The local entry point is used when r2 is known to already be valid
192
   for the function.  There is no requirement on r12 when using the
193
   local entry point, and on return r2 will contain the same value as
194
   at entry.
195
   A value of zero in these bits means that the function has a single
196
   entry point with no requirement on r12 or r2, and that on return r2
197
   will contain the same value as at entry.
198
   Values of one and seven are reserved.  */
199
#define STO_PPC64_LOCAL_BIT		5
200
#define STO_PPC64_LOCAL_MASK		(7 << STO_PPC64_LOCAL_BIT)
201
 
202
// 3 bit other field to bytes.
203
static inline unsigned int
204
ppc64_decode_local_entry(unsigned int other)
205
{
206
  return ((1 << other) >> 2) << 2;
207
}
208
 
209
// bytes to field value.
210
static inline unsigned int
211
ppc64_encode_local_entry(unsigned int val)
212
{
213
  return (val >= 4 * 4
214
	  ? (val >= 8 * 4
215
	     ? (val >= 16 * 4 ? 6 : 5)
216
	     : 4)
217
	  : (val >= 2 * 4
218
	     ? 3
219
	     : (val >= 1 * 4 ? 2 : 0)));
220
}
221
 
222
/* st_other to number of bytes.  */
223
#define PPC64_LOCAL_ENTRY_OFFSET(other)				\
224
  ppc64_decode_local_entry (((other) & STO_PPC64_LOCAL_MASK)	\
225
			    >> STO_PPC64_LOCAL_BIT)
226
/* number of bytes to st_other.  */
227
#define PPC64_SET_LOCAL_ENTRY_OFFSET(val)		\
228
  ppc64_encode_local_entry (val) << STO_PPC64_LOCAL_BIT
229
 
230
/* Specify the start of the .glink section.  */
231
#define DT_PPC64_GLINK		DT_LOPROC
232
 
233
/* Specify the start and size of the .opd section.  */
234
#define DT_PPC64_OPD		(DT_LOPROC + 1)
235
#define DT_PPC64_OPDSZ		(DT_LOPROC + 2)
236
 
237
/* Specify whether various optimisations are possible.  */
238
#define DT_PPC64_OPT		(DT_LOPROC + 3)
239
#define PPC64_OPT_TLS		1
240
#define PPC64_OPT_MULTI_TOC	2
241
 
242
#endif /* _ELF_PPC64_H */