1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #ifndef _RELOC_DOT_H 28 #define _RELOC_DOT_H 29 30 #pragma ident "%Z%%M% %I% %E% SMI" 31 32 #if defined(_KERNEL) 33 #include <sys/machelf.h> 34 #include <sys/bootconf.h> 35 #include <sys/kobj.h> 36 #include <sys/kobj_impl.h> 37 #else 38 #include <machdep.h> 39 #include <rtld.h> 40 #include <conv.h> 41 #endif /* _KERNEL */ 42 43 #include <relmach.h> 44 45 #ifdef __cplusplus 46 extern "C" { 47 #endif 48 49 /* 50 * Global include file for relocation common code. 51 * 52 * Flags for reloc_entry->re_flags 53 */ 54 #define FLG_RE_NOTREL 0x00000000 55 #define FLG_RE_GOTADD 0x00000001 /* create a GOT entry */ 56 #define FLG_RE_GOTREL 0x00000002 /* GOT based */ 57 #define FLG_RE_GOTPC 0x00000004 /* GOT - P */ 58 #define FLG_RE_GOTOPINS 0x00000008 /* GOTOP instruction */ 59 #define FLG_RE_PCREL 0x00000010 60 #define FLG_RE_PLTREL 0x00000020 61 #define FLG_RE_VERIFY 0x00000040 /* verify value fits */ 62 #define FLG_RE_UNALIGN 0x00000080 /* offset is not aligned */ 63 #define FLG_RE_WDISP16 0x00000100 /* funky sparc DISP16 rel */ 64 #define FLG_RE_SIGN 0x00000200 /* value is signed */ 65 #define FLG_RE_ADDRELATIVE 0x00000400 /* RELATIVE relocation */ 66 /* required for non- */ 67 /* fixed objects */ 68 #define FLG_RE_EXTOFFSET 0x00000800 /* extra offset required */ 69 #define FLG_RE_REGISTER 0x00001000 /* relocation initializes */ 70 /* a REGISTER by OLO10 */ 71 #define FLG_RE_SIZE 0x00002000 /* symbol size required */ 72 73 #define FLG_RE_NOTSUP 0x00010000 /* relocation not supported */ 74 75 #define FLG_RE_SEGREL 0x00040000 /* segment relative */ 76 #define FLG_RE_SECREL 0x00080000 /* section relative */ 77 78 #define FLG_RE_TLSGD 0x00200000 /* TLS GD relocation */ 79 #define FLG_RE_TLSLD 0x00400000 /* TLS LD relocation */ 80 #define FLG_RE_TLSIE 0x00800000 /* TLS IE relocation */ 81 #define FLG_RE_TLSLE 0x01000000 /* TLS LE relocation */ 82 #define FLG_RE_LOCLBND 0x02000000 /* relocation must bind */ 83 /* locally */ 84 85 /* 86 * In user land, redefine the relocation table and relocation engine to be 87 * class specific if necessary. This allows both engines to reside in the 88 * intel/amd version of libld. 89 */ 90 #if !defined(_KERNEL) 91 #if defined(_ELF64) 92 #define do_reloc do64_reloc 93 #define reloc_table reloc64_table 94 #else 95 #define do_reloc do32_reloc 96 #define reloc_table reloc32_table 97 #endif 98 #endif 99 100 /* 101 * Relocation table and macros for testing relocation table flags. 102 */ 103 extern const Rel_entry reloc_table[]; 104 105 #define IS_PLT(X) ((reloc_table[(X)].re_flags & \ 106 FLG_RE_PLTREL) != 0) 107 #define IS_GOT_RELATIVE(X) ((reloc_table[(X)].re_flags & \ 108 FLG_RE_GOTADD) != 0) 109 #define IS_GOT_PC(X) ((reloc_table[(X)].re_flags & \ 110 FLG_RE_GOTPC) != 0) 111 #define IS_GOTPCREL(X) ((reloc_table[(X)].re_flags & \ 112 (FLG_RE_GOTPC | FLG_RE_GOTADD)) == \ 113 (FLG_RE_GOTPC | FLG_RE_GOTADD)) 114 #define IS_GOT_BASED(X) ((reloc_table[(X)].re_flags & \ 115 FLG_RE_GOTREL) != 0) 116 #define IS_GOT_INS(X) ((reloc_table[(X)].re_flags & \ 117 FLG_RE_GOTOPINS) != 0) 118 #define IS_GOT_REQUIRED(X) ((reloc_table[(X)].re_flags & \ 119 (FLG_RE_GOTADD | FLG_RE_GOTREL | \ 120 FLG_RE_GOTPC | FLG_RE_GOTOPINS)) != 0) 121 #define IS_PC_RELATIVE(X) ((reloc_table[(X)].re_flags & \ 122 FLG_RE_PCREL) != 0) 123 #define IS_ADD_RELATIVE(X) ((reloc_table[(X)].re_flags & \ 124 FLG_RE_ADDRELATIVE) != 0) 125 #define IS_REGISTER(X) ((reloc_table[(X)].re_flags & \ 126 FLG_RE_REGISTER) != 0) 127 #define IS_NOTSUP(X) ((reloc_table[(X)].re_flags & \ 128 FLG_RE_NOTSUP) != 0) 129 #define IS_SEG_RELATIVE(X) ((reloc_table[(X)].re_flags & \ 130 FLG_RE_SEGREL) != 0) 131 #define IS_EXTOFFSET(X) ((reloc_table[(X)].re_flags & \ 132 FLG_RE_EXTOFFSET) != 0) 133 #define IS_SEC_RELATIVE(X) ((reloc_table[(X)].re_flags & \ 134 FLG_RE_SECREL) != 0) 135 #define IS_TLS_INS(X) ((reloc_table[(X)].re_flags & \ 136 (FLG_RE_TLSGD | FLG_RE_TLSLD | \ 137 FLG_RE_TLSIE | FLG_RE_TLSLE)) != 0) 138 #define IS_TLS_GD(X) ((reloc_table[(X)].re_flags & \ 139 FLG_RE_TLSGD) != 0) 140 #define IS_TLS_LD(X) ((reloc_table[(X)].re_flags & \ 141 FLG_RE_TLSLD) != 0) 142 #define IS_TLS_IE(X) ((reloc_table[(X)].re_flags & \ 143 FLG_RE_TLSIE) != 0) 144 #define IS_TLS_LE(X) ((reloc_table[(X)].re_flags & \ 145 FLG_RE_TLSLE) != 0) 146 #define IS_LOCALBND(X) ((reloc_table[(X)].re_flags & \ 147 FLG_RE_LOCLBND) != 0) 148 #define IS_SIZE(X) ((reloc_table[(X)].re_flags &\ 149 FLG_RE_SIZE) != 0) 150 151 /* 152 * Relocation engine. 153 */ 154 extern int do_reloc(uchar_t, uchar_t *, Xword *, const char *, 155 const char *, void *); 156 157 #if defined(_KERNEL) 158 /* 159 * These are macro's that are only needed for krtld. Many of these are already 160 * defined in the sgs/include files referenced by ld and rtld 161 */ 162 #define S_MASK(n) ((1l << (n)) - 1l) 163 #define S_INRANGE(v, n) (((-(1l << (n)) - 1l) < (v)) && ((v) < (1l << (n)))) 164 165 /* 166 * Message strings used by doreloc(). 167 */ 168 #define MSG_STR_UNKNOWN "(unknown)" 169 170 #define MSG_REL_PREGEN "relocation error: %s: " 171 #define MSG_REL_PREFIL "relocation error: file %s: " 172 #define MSG_REL_FILE "file %s: " 173 #define MSG_REL_SYM "symbol %s: " 174 #define MSG_REL_VALUE "value 0x%llx " 175 #define MSG_REL_LOSEBITS "loses %d bits at " 176 177 #define MSG_REL_UNIMPL "unimplemented relocation type: %d" 178 #define MSG_REL_UNSUPSZ "offset size (%d bytes) is not supported" 179 #define MSG_REL_NONALIGN "offset 0x%llx is non-aligned" 180 #define MSG_REL_UNNOBITS "unsupported number of bits: %d" 181 #define MSG_REL_OFFSET "offset 0x%llx" 182 #define MSG_REL_NOFIT "value 0x%llx does not fit" 183 184 /* 185 * Provide a macro to select the appropriate conversion routine for this 186 * architecture. 187 */ 188 #if defined(__amd64) 189 190 extern const char *conv_reloc_amd64_type(Word); 191 #define CONV_RELOC_TYPE conv_reloc_amd64_type 192 193 #elif defined(__i386) 194 195 extern const char *conv_reloc_386_type(Word); 196 #define CONV_RELOC_TYPE conv_reloc_386_type 197 198 #elif defined(__sparc) 199 200 extern const char *conv_reloc_SPARC_type(Word); 201 #define CONV_RELOC_TYPE conv_reloc_SPARC_type 202 203 #else 204 #error platform not defined! 205 #endif 206 207 /* 208 * Note: dlerror() only keeps track of a single error string, and therefore 209 * must have errors reported through a single eprintf() call. The kernel's 210 * _kobj_printf is somewhat more limited, and must receive messages with only 211 * one argument to the format string. The following macros account for these 212 * differences, as krtld and rtld share do_reloc(). 213 */ 214 #define REL_ERR_UNIMPL(lml, file, sym, rtype) \ 215 _kobj_printf(ops, MSG_REL_PREFIL, (file)); \ 216 _kobj_printf(ops, MSG_REL_SYM, ((sym) ? (sym) : MSG_STR_UNKNOWN)); \ 217 _kobj_printf(ops, MSG_REL_UNIMPL, (int)(rtype)) 218 219 #define REL_ERR_UNSUPSZ(lml, file, sym, rtype, size) \ 220 _kobj_printf(ops, MSG_REL_PREGEN, CONV_RELOC_TYPE((rtype))); \ 221 _kobj_printf(ops, MSG_REL_FILE, (file)); \ 222 _kobj_printf(ops, MSG_REL_SYM, ((sym) ? (sym) : MSG_STR_UNKNOWN)); \ 223 _kobj_printf(ops, MSG_REL_UNSUPSZ, (int)(size)) 224 225 #define REL_ERR_NONALIGN(lml, file, sym, rtype, off) \ 226 _kobj_printf(ops, MSG_REL_PREGEN, CONV_RELOC_TYPE((rtype))); \ 227 _kobj_printf(ops, MSG_REL_FILE, (file)); \ 228 _kobj_printf(ops, MSG_REL_SYM, ((sym) ? (sym) : MSG_STR_UNKNOWN)); \ 229 _kobj_printf(ops, MSG_REL_NONALIGN, EC_OFF((off))) 230 231 #define REL_ERR_UNNOBITS(lml, file, sym, rtype, nbits) \ 232 _kobj_printf(ops, MSG_REL_PREGEN, CONV_RELOC_TYPE((rtype))); \ 233 _kobj_printf(ops, MSG_REL_FILE, (file)); \ 234 _kobj_printf(ops, MSG_REL_SYM, ((sym) ? (sym) : MSG_STR_UNKNOWN)); \ 235 _kobj_printf(ops, MSG_REL_UNNOBITS, (nbits)) 236 237 #define REL_ERR_LOSEBITS(lml, file, sym, rtype, uvalue, nbits, off) \ 238 _kobj_printf(ops, MSG_REL_PREGEN, CONV_RELOC_TYPE((rtype))); \ 239 _kobj_printf(ops, MSG_REL_FILE, (file)); \ 240 _kobj_printf(ops, MSG_REL_SYM, ((sym) ? (sym) : MSG_STR_UNKNOWN)); \ 241 _kobj_printf(ops, MSG_REL_VALUE, EC_XWORD((uvalue))); \ 242 _kobj_printf(ops, MSG_REL_LOSEBITS, (int)(nbits)); \ 243 _kobj_printf(ops, MSG_REL_OFFSET, EC_NATPTR((off))) 244 245 #define REL_ERR_NOFIT(lml, file, sym, rtype, uvalue) \ 246 _kobj_printf(ops, MSG_REL_PREGEN, CONV_RELOC_TYPE((rtype))); \ 247 _kobj_printf(ops, MSG_REL_FILE, (file)); \ 248 _kobj_printf(ops, MSG_REL_SYM, ((sym) ? (sym) : MSG_STR_UNKNOWN)); \ 249 _kobj_printf(ops, MSG_REL_NOFIT, EC_XWORD((uvalue))) 250 251 252 #else /* !_KERNEL */ 253 254 extern const char *demangle(const char *); 255 256 #define REL_ERR_UNIMPL(lml, file, sym, rtype) \ 257 (eprintf(lml, ERR_FATAL, MSG_INTL(MSG_REL_UNIMPL), (file), \ 258 ((sym) ? demangle(sym) : MSG_INTL(MSG_STR_UNKNOWN)), (int)(rtype))) 259 260 #define REL_ERR_UNSUPSZ(lml, file, sym, rtype, size) \ 261 (eprintf(lml, ERR_FATAL, MSG_INTL(MSG_REL_UNSUPSZ), \ 262 conv_reloc_type(M_MACH, (rtype), 0), (file), \ 263 ((sym) ? demangle(sym) : MSG_INTL(MSG_STR_UNKNOWN)), (int)(size))) 264 265 #define REL_ERR_NONALIGN(lml, file, sym, rtype, off) \ 266 (eprintf(lml, ERR_FATAL, MSG_INTL(MSG_REL_NONALIGN), \ 267 conv_reloc_type(M_MACH, (rtype), 0), (file), \ 268 ((sym) ? demangle(sym) : MSG_INTL(MSG_STR_UNKNOWN)), EC_OFF((off)))) 269 270 #define REL_ERR_UNNOBITS(lml, file, sym, rtype, nbits) \ 271 (eprintf(lml, ERR_FATAL, MSG_INTL(MSG_REL_UNNOBITS), \ 272 conv_reloc_type(M_MACH, (rtype), 0), (file), \ 273 ((sym) ? demangle(sym) : MSG_INTL(MSG_STR_UNKNOWN)), (nbits))) 274 275 #define REL_ERR_LOSEBITS(lml, file, sym, rtype, uvalue, nbits, off) \ 276 (eprintf(lml, ERR_FATAL, MSG_INTL(MSG_REL_LOSEBITS), \ 277 conv_reloc_type(M_MACH, (rtype), 0), (file), \ 278 ((sym) ? demangle(sym) : MSG_INTL(MSG_STR_UNKNOWN)), \ 279 EC_XWORD((uvalue)), (nbits), EC_NATPTR((off)))) 280 281 #define REL_ERR_NOFIT(lml, file, sym, rtype, uvalue) \ 282 (eprintf(lml, ERR_FATAL, MSG_INTL(MSG_REL_NOFIT), \ 283 conv_reloc_type(M_MACH, (rtype), 0), (file), \ 284 ((sym) ? demangle(sym) : MSG_INTL(MSG_STR_UNKNOWN)), \ 285 EC_XWORD((uvalue)))) 286 287 #endif /* _KERNEL */ 288 289 #ifdef __cplusplus 290 } 291 #endif 292 293 #endif /* _RELOC_DOT_H */ 294