1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
|
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 1995, 2010, Oracle and/or its affiliates. All rights reserved.
*
* Copyright 2020 Joyent, Inc.
*/
#ifndef _RELOC_DOT_H
#define _RELOC_DOT_H
#if defined(_KERNEL)
#include <sys/bootconf.h>
#include <sys/kobj.h>
#include <sys/kobj_impl.h>
#else
#include <rtld.h>
#include <conv.h>
#endif /* _KERNEL */
#include "reloc_defs.h"
#ifdef __cplusplus
extern "C" {
#endif
/*
* Global include file for relocation common code.
*/
/*
* In user land, redefine the relocation table and relocation engine to be
* class/machine specific if necessary. This allows multiple engines to
* reside within a single instance of libld.
*/
#if !defined(_KERNEL)
#if defined(DO_RELOC_LIBLD)
#undef DO_RELOC_LIBLD
#endif
#if defined(DO_RELOC_LIBLD_X86)
#define DO_RELOC_LIBLD
#if defined(_ELF64)
#define do_reloc_ld do64_reloc_ld_x86
#define reloc_table reloc64_table_x86
#else
#define do_reloc_ld do32_reloc_ld_x86
#define reloc_table reloc32_table_x86
#endif
#elif defined(DO_RELOC_LIBLD_SPARC)
#define DO_RELOC_LIBLD
#if defined(_ELF64)
#define do_reloc_ld do64_reloc_ld_sparc
#define reloc_table reloc64_table_sparc
#else
#define do_reloc_ld do32_reloc_ld_sparc
#define reloc_table reloc32_table_sparc
#endif
#else /* rtld */
#if defined(_ELF64)
#define do_reloc_rtld do64_reloc_rtld
#define reloc_table reloc64_table
#else
#define do_reloc_rtld do32_reloc_rtld
#define reloc_table reloc32_table
#endif
#endif
#endif /* !_KERNEL */
/*
* Relocation table and macros for testing relocation table flags.
*/
extern const Rel_entry reloc_table[];
#define IS_PLT(X) RELTAB_IS_PLT(X, reloc_table)
#define IS_GOT_RELATIVE(X) RELTAB_IS_GOT_RELATIVE(X, reloc_table)
#define IS_GOT_PC(X) RELTAB_IS_GOT_PC(X, reloc_table)
#define IS_GOTPCREL(X) RELTAB_IS_GOTPCREL(X, reloc_table)
#define IS_GOT_BASED(X) RELTAB_IS_GOT_BASED(X, reloc_table)
#define IS_GOT_OPINS(X) RELTAB_IS_GOT_OPINS(X, reloc_table)
#define IS_GOT_REQUIRED(X) RELTAB_IS_GOT_REQUIRED(X, reloc_table)
#define IS_PC_RELATIVE(X) RELTAB_IS_PC_RELATIVE(X, reloc_table)
#define IS_ADD_RELATIVE(X) RELTAB_IS_ADD_RELATIVE(X, reloc_table)
#define IS_REGISTER(X) RELTAB_IS_REGISTER(X, reloc_table)
#define IS_NOTSUP(X) RELTAB_IS_NOTSUP(X, reloc_table)
#define IS_SEG_RELATIVE(X) RELTAB_IS_SEG_RELATIVE(X, reloc_table)
#define IS_EXTOFFSET(X) RELTAB_IS_EXTOFFSET(X, reloc_table)
#define IS_SEC_RELATIVE(X) RELTAB_IS_SEC_RELATIVE(X, reloc_table)
#define IS_TLS_INS(X) RELTAB_IS_TLS_INS(X, reloc_table)
#define IS_TLS_GD(X) RELTAB_IS_TLS_GD(X, reloc_table)
#define IS_TLS_LD(X) RELTAB_IS_TLS_LD(X, reloc_table)
#define IS_TLS_IE(X) RELTAB_IS_TLS_IE(X, reloc_table)
#define IS_TLS_LE(X) RELTAB_IS_TLS_LE(X, reloc_table)
#define IS_LOCALBND(X) RELTAB_IS_LOCALBND(X, reloc_table)
#define IS_SIZE(X) RELTAB_IS_SIZE(X, reloc_table)
/*
* Relocation engine.
*
* The do_reloc() code is used in three different places: The kernel,
* the link-editor, and the runtime linker. All three convey the same
* basic information with the first 5 arguments:
*
* 1) Relocation type. The kernel and runtime linker pass this as
* an integer value, while the link-editor passes it as a Rel_desc
* descriptor. The relocation engine only looks at the rel_rtype
* field of this descriptor, and does not examine the other fields,
* which are explicitly allowed to contain garbage.
* 2) Address of offset
* 3) Address of value
* 4) Name of symbol associated with the relocation, used if it is
* necessary to report an error. The kernel and runtime linker pass
* directly as a string pointer. The link-editor passes the address
* of a rel_desc_sname_func_t function, which can be called by do_reloc(),
* passing it the Rel_desc pointer (argument 1, above), to obtain the
* string pointer.
* 5) String giving the source file for the relocation.
*
* In addition:
* - The linker and rtld want a link map pointer argument
* - The linker wants to pass a byte swap argument that tells
* the relocation engine that the data it is relocating
* has the opposite byte order of the system running the
* linker.
* - The linker is a cross-linker, meaning that it can examine
* relocation records for target hosts other than that of
* the currently running system. This means that multiple
* versions of the relocation code must be able to reside
* in a single program, without namespace clashes.
*
* To ensure that there is never any confusion about which version is
* being linked to, we give each variant a different name, even though
* each one is generated from the same source code.
*
* do_reloc_krtld()
* The kernel version is provided if the _KERNEL macro is defined.
*
* do_reloc_ld()
* The ld version is provided if the DO_RELOC_LIBLD_ macro is defined.
*
* do_reloc_rtld()
* The rtld version is provided if neither _KERNEL or DO_RELOC_LIBLD
* are defined.
*
* Implementations of do_reloc() should use these same macros to
* conditionalize any code not used by all three versions.
*/
#if defined(_KERNEL)
extern int do_reloc_krtld(uchar_t, uchar_t *, Xword *, const char *,
const char *);
#elif defined(DO_RELOC_LIBLD)
extern int do_reloc_ld(Rel_desc *, uchar_t *, Xword *,
rel_desc_sname_func_t, const char *, int, void *);
#else
extern int do_reloc_rtld(uchar_t, uchar_t *, Xword *, const char *,
const char *, void *);
#endif
#if defined(_KERNEL)
/*
* These are macro's that are only needed for krtld. Many of these are already
* defined in the sgs/include files referenced by ld and rtld
*/
#define S_MASK(n) ((1l << (n)) - 1l)
#define S_INRANGE(v, n) (((-(1l << (n)) - 1l) < (v)) && ((v) < (1l << (n))))
/*
* Message strings used by doreloc().
*/
#define MSG_STR_UNKNOWN "(unknown)"
#define MSG_REL_PREGEN "relocation error: %s: "
#define MSG_REL_PREFIL "relocation error: file %s: "
#define MSG_REL_FILE "file %s: "
#define MSG_REL_SYM "symbol %s: "
#define MSG_REL_VALUE "value 0x%llx "
#define MSG_REL_LOSEBITS "loses %d bits at "
#define MSG_REL_UNIMPL "unimplemented relocation type: %d"
#define MSG_REL_UNSUPSZ "offset size (%d bytes) is not supported"
#define MSG_REL_NONALIGN "offset 0x%llx is non-aligned"
#define MSG_REL_UNNOBITS "unsupported number of bits: %d"
#define MSG_REL_OFFSET "offset 0x%llx"
#define MSG_REL_NOFIT "value 0x%llx does not fit"
/*
* Provide a macro to select the appropriate conversion routine for this
* architecture.
*/
#if defined(__amd64)
extern const char *conv_reloc_amd64_type(Word);
#define CONV_RELOC_TYPE conv_reloc_amd64_type
#elif defined(__i386)
extern const char *conv_reloc_386_type(Word);
#define CONV_RELOC_TYPE conv_reloc_386_type
#elif defined(__sparc)
extern const char *conv_reloc_SPARC_type(Word);
#define CONV_RELOC_TYPE conv_reloc_SPARC_type
#else
#error platform not defined!
#endif
/*
* Note: dlerror() only keeps track of a single error string, and therefore
* must have errors reported through a single eprintf() call. The kernel's
* _kobj_printf is somewhat more limited, and must receive messages with only
* one argument to the format string. The following macros account for these
* differences, as krtld and rtld share the same do_reloc() source.
*/
#define REL_ERR_UNIMPL(lml, file, sym, rtype) \
_kobj_printf(ops, MSG_REL_PREFIL, (file)); \
_kobj_printf(ops, MSG_REL_SYM, ((sym) ? (sym) : MSG_STR_UNKNOWN)); \
_kobj_printf(ops, MSG_REL_UNIMPL, (int)(rtype))
#define REL_ERR_UNSUPSZ(lml, file, sym, rtype, size) \
_kobj_printf(ops, MSG_REL_PREGEN, CONV_RELOC_TYPE((rtype))); \
_kobj_printf(ops, MSG_REL_FILE, (file)); \
_kobj_printf(ops, MSG_REL_SYM, ((sym) ? (sym) : MSG_STR_UNKNOWN)); \
_kobj_printf(ops, MSG_REL_UNSUPSZ, (int)(size))
#define REL_ERR_NONALIGN(lml, file, sym, rtype, off) \
_kobj_printf(ops, MSG_REL_PREGEN, CONV_RELOC_TYPE((rtype))); \
_kobj_printf(ops, MSG_REL_FILE, (file)); \
_kobj_printf(ops, MSG_REL_SYM, ((sym) ? (sym) : MSG_STR_UNKNOWN)); \
_kobj_printf(ops, MSG_REL_NONALIGN, (u_longlong_t)EC_OFF((off)))
#define REL_ERR_UNNOBITS(lml, file, sym, rtype, nbits) \
_kobj_printf(ops, MSG_REL_PREGEN, CONV_RELOC_TYPE((rtype))); \
_kobj_printf(ops, MSG_REL_FILE, (file)); \
_kobj_printf(ops, MSG_REL_SYM, ((sym) ? (sym) : MSG_STR_UNKNOWN)); \
_kobj_printf(ops, MSG_REL_UNNOBITS, (nbits))
#define REL_ERR_LOSEBITS(lml, file, sym, rtype, uvalue, nbits, off) \
_kobj_printf(ops, MSG_REL_PREGEN, CONV_RELOC_TYPE((rtype))); \
_kobj_printf(ops, MSG_REL_FILE, (file)); \
_kobj_printf(ops, MSG_REL_SYM, ((sym) ? (sym) : MSG_STR_UNKNOWN)); \
_kobj_printf(ops, MSG_REL_VALUE, (u_longlong_t)EC_XWORD((uvalue))); \
_kobj_printf(ops, MSG_REL_LOSEBITS, (int)(nbits)); \
_kobj_printf(ops, MSG_REL_OFFSET, (u_longlong_t)EC_NATPTR((off)))
#define REL_ERR_NOFIT(lml, file, sym, rtype, uvalue) \
_kobj_printf(ops, MSG_REL_PREGEN, CONV_RELOC_TYPE((rtype))); \
_kobj_printf(ops, MSG_REL_FILE, (file)); \
_kobj_printf(ops, MSG_REL_SYM, ((sym) ? (sym) : MSG_STR_UNKNOWN)); \
_kobj_printf(ops, MSG_REL_NOFIT, (u_longlong_t)EC_XWORD((uvalue)))
#else /* !_KERNEL */
extern const char *demangle(const char *);
#define REL_ERR_UNIMPL(lml, file, sym, rtype) \
(eprintf(lml, ERR_FATAL, MSG_INTL(MSG_REL_UNIMPL), (file), \
((sym) ? demangle(sym) : MSG_INTL(MSG_STR_UNKNOWN)), (int)(rtype)))
#define REL_ERR_UNSUPSZ(lml, file, sym, rtype, size) \
(eprintf(lml, ERR_FATAL, MSG_INTL(MSG_REL_UNSUPSZ), \
conv_reloc_type_static(M_MACH, (rtype), 0), (file), \
((sym) ? demangle(sym) : MSG_INTL(MSG_STR_UNKNOWN)), (int)(size)))
#define REL_ERR_NONALIGN(lml, file, sym, rtype, off) \
(eprintf(lml, ERR_FATAL, MSG_INTL(MSG_REL_NONALIGN), \
conv_reloc_type_static(M_MACH, (rtype), 0), (file), \
((sym) ? demangle(sym) : MSG_INTL(MSG_STR_UNKNOWN)), EC_OFF((off))))
#define REL_ERR_UNNOBITS(lml, file, sym, rtype, nbits) \
(eprintf(lml, ERR_FATAL, MSG_INTL(MSG_REL_UNNOBITS), \
conv_reloc_type_static(M_MACH, (rtype), 0), (file), \
((sym) ? demangle(sym) : MSG_INTL(MSG_STR_UNKNOWN)), (nbits)))
#define REL_ERR_LOSEBITS(lml, file, sym, rtype, uvalue, nbits, off) \
(eprintf(lml, ERR_FATAL, MSG_INTL(MSG_REL_LOSEBITS), \
conv_reloc_type_static(M_MACH, (rtype), 0), (file), \
((sym) ? demangle(sym) : MSG_INTL(MSG_STR_UNKNOWN)), \
EC_XWORD((uvalue)), (nbits), EC_NATPTR((off))))
#define REL_ERR_NOFIT(lml, file, sym, rtype, uvalue) \
(eprintf(lml, ERR_FATAL, MSG_INTL(MSG_REL_NOFIT), \
conv_reloc_type_static(M_MACH, (rtype), 0), (file), \
((sym) ? demangle(sym) : MSG_INTL(MSG_STR_UNKNOWN)), \
EC_XWORD((uvalue))))
#endif /* _KERNEL */
#ifdef __cplusplus
}
#endif
#endif /* _RELOC_DOT_H */
|
