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-fixed */ 67 /* 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_NOTSUP 0x00010000 /* relocation not supported */ 72 73 #define FLG_RE_SEGREL 0x00040000 /* segment relative */ 74 #define FLG_RE_SECREL 0x00080000 /* section relative */ 75 #define FLG_RE_TLSINS 0x00100000 /* TLS instructino rel */ 76 #define FLG_RE_TLSGD 0x00200000 /* TLS GD relocation */ 77 #define FLG_RE_TLSLD 0x00400000 /* TLS LD relocation */ 78 #define FLG_RE_TLSIE 0x00800000 /* TLS IE relocation */ 79 #define FLG_RE_TLSLE 0x01000000 /* TLS LE relocation */ 80 #define FLG_RE_LOCLBND 0x02000000 /* relocation must bind */ 81 /* locally */ 82 83 /* 84 * In user land, redefine the relocation table and relocation engine to be 85 * class specific if necessary. This allows both engines to reside in the 86 * intel/amd version of libld. 87 */ 88 #if !defined(_KERNEL) 89 #if defined(_ELF64) 90 #define do_reloc do64_reloc 91 #define reloc_table reloc64_table 92 #else 93 #define do_reloc do32_reloc 94 #define reloc_table reloc32_table 95 #endif 96 #endif 97 98 /* 99 * Relocation table and macros for testing relocation table flags. 100 */ 101 extern const Rel_entry reloc_table[]; 102 103 #define IS_PLT(X) ((reloc_table[(X)].re_flags & \ 104 FLG_RE_PLTREL) != 0) 105 #define IS_GOT_RELATIVE(X) ((reloc_table[(X)].re_flags & \ 106 FLG_RE_GOTADD) != 0) 107 #define IS_GOT_PC(X) ((reloc_table[(X)].re_flags & \ 108 FLG_RE_GOTPC) != 0) 109 #define IS_GOTPCREL(X) ((reloc_table[(X)].re_flags & \ 110 (FLG_RE_GOTPC | FLG_RE_GOTADD)) == \ 111 (FLG_RE_GOTPC | FLG_RE_GOTADD)) 112 #define IS_GOT_BASED(X) ((reloc_table[(X)].re_flags & \ 113 FLG_RE_GOTREL) != 0) 114 #define IS_GOT_INS(X) ((reloc_table[(X)].re_flags & \ 115 FLG_RE_GOTOPINS) != 0) 116 #define IS_GOT_REQUIRED(X) ((reloc_table[(X)].re_flags & \ 117 (FLG_RE_GOTADD | FLG_RE_GOTREL | \ 118 FLG_RE_GOTPC | FLG_RE_GOTOPINS)) != 0) 119 #define IS_PC_RELATIVE(X) ((reloc_table[(X)].re_flags & \ 120 FLG_RE_PCREL) != 0) 121 #define IS_ADD_RELATIVE(X) ((reloc_table[(X)].re_flags & \ 122 FLG_RE_ADDRELATIVE) != 0) 123 #define IS_REGISTER(X) ((reloc_table[(X)].re_flags & \ 124 FLG_RE_REGISTER) != 0) 125 #define IS_FORMOFF(X) ((reloc_table[(X)].re_flags & \ 126 FLG_RE_FRMOFF) != 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_TLSINS) != 0) 137 #define IS_TLS_GD(X) ((reloc_table[(X)].re_flags & \ 138 FLG_RE_TLSGD) != 0) 139 #define IS_TLS_LD(X) ((reloc_table[(X)].re_flags & \ 140 FLG_RE_TLSLD) != 0) 141 #define IS_TLS_IE(X) ((reloc_table[(X)].re_flags & \ 142 FLG_RE_TLSIE) != 0) 143 #define IS_TLS_LE(X) ((reloc_table[(X)].re_flags & \ 144 FLG_RE_TLSLE) != 0) 145 #define IS_TLS(X) ((reloc_table[(X)].re_flags & \ 146 (FLG_RE_TLSINS|FLG_RE_TLSGD| \ 147 FLG_RE_TLSLD|FLG_RE_TLSIE| \ 148 FLG_RE_TLSLE)) != 0) 149 #define IS_LOCALBND(X) ((reloc_table[(X)].re_flags & \ 150 FLG_RE_LOCLBND) != 0) 151 152 /* 153 * Relocation engine. 154 */ 155 extern int do_reloc(uchar_t, uchar_t *, Xword *, const char *, 156 const char *, void *); 157 158 #if defined(_KERNEL) 159 /* 160 * These are macro's that are only needed for krtld. Many of these are already 161 * defined in the sgs/include files referenced by ld and rtld 162 */ 163 #define S_MASK(n) ((1l << (n)) - 1l) 164 #define S_INRANGE(v, n) (((-(1l << (n)) - 1l) < (v)) && ((v) < (1l << (n)))) 165 166 /* 167 * Message strings used by doreloc(). 168 */ 169 #define MSG_STR_UNKNOWN "(unknown)" 170 171 #define MSG_REL_PREGEN "relocation error: %s: " 172 #define MSG_REL_PREFIL "relocation error: file %s: " 173 #define MSG_REL_FILE "file %s: " 174 #define MSG_REL_SYM "symbol %s: " 175 #define MSG_REL_VALUE "value 0x%llx " 176 #define MSG_REL_LOSEBITS "loses %d bits at " 177 178 #define MSG_REL_UNIMPL "unimplemented relocation type: %d" 179 #define MSG_REL_UNSUPSZ "offset size (%d bytes) is not supported" 180 #define MSG_REL_NONALIGN "offset 0x%llx is non-aligned" 181 #define MSG_REL_UNNOBITS "unsupported number of bits: %d" 182 #define MSG_REL_OFFSET "offset 0x%llx" 183 #define MSG_REL_NOFIT "value 0x%llx does not fit" 184 185 /* 186 * Provide a macro to select the appropriate conversion routine for this 187 * architecture. 188 */ 189 #if defined(__amd64) 190 191 extern const char *conv_reloc_amd64_type(Word); 192 #define CONV_RELOC_TYPE conv_reloc_amd64_type 193 194 #elif defined(__i386) 195 196 extern const char *conv_reloc_386_type(Word); 197 #define CONV_RELOC_TYPE conv_reloc_386_type 198 199 #elif defined(__sparc) 200 201 extern const char *conv_reloc_SPARC_type(Word); 202 #define CONV_RELOC_TYPE conv_reloc_SPARC_type 203 204 #else 205 #error platform not defined! 206 #endif 207 208 /* 209 * Note: dlerror() only keeps track of a single error string, and therefore 210 * must have errors reported through a single eprintf() call. The kernel's 211 * _kobj_printf is somewhat more limited, and must receive messages with only 212 * one argument to the format string. The following macros account for these 213 * differences, as krtld and rtld share do_reloc(). 214 */ 215 #define REL_ERR_UNIMPL(lml, file, sym, rtype) \ 216 _kobj_printf(ops, MSG_REL_PREFIL, (file)); \ 217 _kobj_printf(ops, MSG_REL_SYM, ((sym) ? (sym) : MSG_STR_UNKNOWN)); \ 218 _kobj_printf(ops, MSG_REL_UNIMPL, (int)(rtype)) 219 220 #define REL_ERR_UNSUPSZ(lml, file, sym, rtype, size) \ 221 _kobj_printf(ops, MSG_REL_PREGEN, CONV_RELOC_TYPE((rtype))); \ 222 _kobj_printf(ops, MSG_REL_FILE, (file)); \ 223 _kobj_printf(ops, MSG_REL_SYM, ((sym) ? (sym) : MSG_STR_UNKNOWN)); \ 224 _kobj_printf(ops, MSG_REL_UNSUPSZ, (int)(size)) 225 226 #define REL_ERR_NONALIGN(lml, file, sym, rtype, off) \ 227 _kobj_printf(ops, MSG_REL_PREGEN, CONV_RELOC_TYPE((rtype))); \ 228 _kobj_printf(ops, MSG_REL_FILE, (file)); \ 229 _kobj_printf(ops, MSG_REL_SYM, ((sym) ? (sym) : MSG_STR_UNKNOWN)); \ 230 _kobj_printf(ops, MSG_REL_NONALIGN, EC_OFF((off))) 231 232 #define REL_ERR_UNNOBITS(lml, file, sym, rtype, nbits) \ 233 _kobj_printf(ops, MSG_REL_PREGEN, CONV_RELOC_TYPE((rtype))); \ 234 _kobj_printf(ops, MSG_REL_FILE, (file)); \ 235 _kobj_printf(ops, MSG_REL_SYM, ((sym) ? (sym) : MSG_STR_UNKNOWN)); \ 236 _kobj_printf(ops, MSG_REL_UNNOBITS, (nbits)) 237 238 #define REL_ERR_LOSEBITS(lml, file, sym, rtype, uvalue, nbits, off) \ 239 _kobj_printf(ops, MSG_REL_PREGEN, CONV_RELOC_TYPE((rtype))); \ 240 _kobj_printf(ops, MSG_REL_FILE, (file)); \ 241 _kobj_printf(ops, MSG_REL_SYM, ((sym) ? (sym) : MSG_STR_UNKNOWN)); \ 242 _kobj_printf(ops, MSG_REL_VALUE, EC_XWORD((uvalue))); \ 243 _kobj_printf(ops, MSG_REL_LOSEBITS, (int)(nbits)); \ 244 _kobj_printf(ops, MSG_REL_OFFSET, EC_NATPTR((off))) 245 246 #define REL_ERR_NOFIT(lml, file, sym, rtype, uvalue) \ 247 _kobj_printf(ops, MSG_REL_PREGEN, CONV_RELOC_TYPE((rtype))); \ 248 _kobj_printf(ops, MSG_REL_FILE, (file)); \ 249 _kobj_printf(ops, MSG_REL_SYM, ((sym) ? (sym) : MSG_STR_UNKNOWN)); \ 250 _kobj_printf(ops, MSG_REL_NOFIT, EC_XWORD((uvalue))) 251 252 253 #else /* !_KERNEL */ 254 255 extern const char *demangle(const char *); 256 257 #define REL_ERR_UNIMPL(lml, file, sym, rtype) \ 258 (eprintf(lml, ERR_FATAL, MSG_INTL(MSG_REL_UNIMPL), (file), \ 259 ((sym) ? demangle(sym) : MSG_INTL(MSG_STR_UNKNOWN)), (int)(rtype))) 260 261 #define REL_ERR_UNSUPSZ(lml, file, sym, rtype, size) \ 262 (eprintf(lml, ERR_FATAL, MSG_INTL(MSG_REL_UNSUPSZ), \ 263 conv_reloc_type(M_MACH, (rtype)), (file), \ 264 ((sym) ? demangle(sym) : MSG_INTL(MSG_STR_UNKNOWN)), (int)(size))) 265 266 #define REL_ERR_NONALIGN(lml, file, sym, rtype, off) \ 267 (eprintf(lml, ERR_FATAL, MSG_INTL(MSG_REL_NONALIGN), \ 268 conv_reloc_type(M_MACH, (rtype)), (file), \ 269 ((sym) ? demangle(sym) : MSG_INTL(MSG_STR_UNKNOWN)), EC_OFF((off)))) 270 271 #define REL_ERR_UNNOBITS(lml, file, sym, rtype, nbits) \ 272 (eprintf(lml, ERR_FATAL, MSG_INTL(MSG_REL_UNNOBITS), \ 273 conv_reloc_type(M_MACH, (rtype)), (file), \ 274 ((sym) ? demangle(sym) : MSG_INTL(MSG_STR_UNKNOWN)), (nbits))) 275 276 #define REL_ERR_LOSEBITS(lml, file, sym, rtype, uvalue, nbits, off) \ 277 (eprintf(lml, ERR_FATAL, MSG_INTL(MSG_REL_LOSEBITS), \ 278 conv_reloc_type(M_MACH, (rtype)), (file), \ 279 ((sym) ? demangle(sym) : MSG_INTL(MSG_STR_UNKNOWN)), \ 280 EC_XWORD((uvalue)), (nbits), EC_NATPTR((off)))) 281 282 #define REL_ERR_NOFIT(lml, file, sym, rtype, uvalue) \ 283 (eprintf(lml, ERR_FATAL, MSG_INTL(MSG_REL_NOFIT), \ 284 conv_reloc_type(M_MACH, (rtype)), (file), \ 285 ((sym) ? demangle(sym) : MSG_INTL(MSG_STR_UNKNOWN)), \ 286 EC_XWORD((uvalue)))) 287 288 #endif /* _KERNEL */ 289 290 #ifdef __cplusplus 291 } 292 #endif 293 294 #endif /* _RELOC_DOT_H */ 295