17c478bd9Sstevel@tonic-gate /* 27c478bd9Sstevel@tonic-gate * CDDL HEADER START 37c478bd9Sstevel@tonic-gate * 47c478bd9Sstevel@tonic-gate * The contents of this file are subject to the terms of the 55aefb655Srie * Common Development and Distribution License (the "License"). 65aefb655Srie * You may not use this file except in compliance with the License. 77c478bd9Sstevel@tonic-gate * 87c478bd9Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 97c478bd9Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 107c478bd9Sstevel@tonic-gate * See the License for the specific language governing permissions 117c478bd9Sstevel@tonic-gate * and limitations under the License. 127c478bd9Sstevel@tonic-gate * 137c478bd9Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 147c478bd9Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 157c478bd9Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 167c478bd9Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 177c478bd9Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 187c478bd9Sstevel@tonic-gate * 197c478bd9Sstevel@tonic-gate * CDDL HEADER END 207c478bd9Sstevel@tonic-gate */ 21552ff457Srie 227c478bd9Sstevel@tonic-gate /* 23*ba2be530Sab196087 * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 247c478bd9Sstevel@tonic-gate * Use is subject to license terms. 257c478bd9Sstevel@tonic-gate */ 26552ff457Srie 277c478bd9Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 287c478bd9Sstevel@tonic-gate 297c478bd9Sstevel@tonic-gate #if defined(_KERNEL) 307c478bd9Sstevel@tonic-gate #include <sys/types.h> 317c478bd9Sstevel@tonic-gate #include "reloc.h" 327c478bd9Sstevel@tonic-gate #else 33*ba2be530Sab196087 #define ELF_TARGET_386 34*ba2be530Sab196087 #if defined(DO_RELOC_LIBLD) 35*ba2be530Sab196087 #undef DO_RELOC_LIBLD 36*ba2be530Sab196087 #define DO_RELOC_LIBLD_X86 37*ba2be530Sab196087 #endif 387c478bd9Sstevel@tonic-gate #include <stdio.h> 397c478bd9Sstevel@tonic-gate #include "sgs.h" 407c478bd9Sstevel@tonic-gate #include "machdep.h" 417c478bd9Sstevel@tonic-gate #include "libld.h" 427c478bd9Sstevel@tonic-gate #include "reloc.h" 437c478bd9Sstevel@tonic-gate #include "conv.h" 447c478bd9Sstevel@tonic-gate #include "msg.h" 457c478bd9Sstevel@tonic-gate #endif 467c478bd9Sstevel@tonic-gate 477c478bd9Sstevel@tonic-gate /* 48*ba2be530Sab196087 * We need to build this code differently when it is used for 49*ba2be530Sab196087 * cross linking: 50*ba2be530Sab196087 * - Data alignment requirements can differ from those 51*ba2be530Sab196087 * of the running system, so we can't access data 52*ba2be530Sab196087 * in units larger than a byte 53*ba2be530Sab196087 * - We have to include code to do byte swapping when the 54*ba2be530Sab196087 * target and linker host use different byte ordering, 55*ba2be530Sab196087 * but such code is a waste when running natively. 56*ba2be530Sab196087 */ 57*ba2be530Sab196087 #if !defined(DO_RELOC_LIBLD) || defined(__i386) || defined(__amd64) 58*ba2be530Sab196087 #define DORELOC_NATIVE 59*ba2be530Sab196087 #endif 60*ba2be530Sab196087 61*ba2be530Sab196087 /* 62552ff457Srie * This table represents the current relocations that do_reloc() is able to 63552ff457Srie * process. The relocations below that are marked SPECIAL are relocations that 64552ff457Srie * take special processing and shouldn't actually ever be passed to do_reloc(). 657c478bd9Sstevel@tonic-gate */ 667c478bd9Sstevel@tonic-gate const Rel_entry reloc_table[R_386_NUM] = { 67*ba2be530Sab196087 /* R_386_NONE */ {0, FLG_RE_NOTREL, 0, 0, 0}, 68*ba2be530Sab196087 /* R_386_32 */ {0, FLG_RE_NOTREL, 4, 0, 0}, 69*ba2be530Sab196087 /* R_386_PC32 */ {0, FLG_RE_PCREL, 4, 0, 0}, 70*ba2be530Sab196087 /* R_386_GOT32 */ {0, FLG_RE_GOTADD, 4, 0, 0}, 71*ba2be530Sab196087 /* R_386_PLT32 */ {0, FLG_RE_PLTREL | FLG_RE_PCREL, 4, 0, 0}, 72*ba2be530Sab196087 /* R_386_COPY */ {0, FLG_RE_NOTREL, 0, 0, 0}, /* SPECIAL */ 73*ba2be530Sab196087 /* R_386_GLOB_DAT */ {0, FLG_RE_NOTREL, 4, 0, 0}, 74*ba2be530Sab196087 /* R_386_JMP_SLOT */ {0, FLG_RE_NOTREL, 4, 0, 0}, /* SPECIAL */ 75*ba2be530Sab196087 /* R_386_RELATIVE */ {0, FLG_RE_NOTREL, 4, 0, 0}, 76*ba2be530Sab196087 /* R_386_GOTOFF */ {0, FLG_RE_GOTREL, 4, 0, 0}, 77*ba2be530Sab196087 /* R_386_GOTPC */ {0, FLG_RE_PCREL | FLG_RE_GOTPC | FLG_RE_LOCLBND, 4, 78*ba2be530Sab196087 0, 0}, 79*ba2be530Sab196087 /* R_386_32PLT */ {0, FLG_RE_PLTREL, 4, 0, 0}, 80*ba2be530Sab196087 /* R_386_TLS_GD_PLT */ {0, FLG_RE_PLTREL | FLG_RE_PCREL | FLG_RE_TLSGD, 4, 81*ba2be530Sab196087 0, 0}, 82*ba2be530Sab196087 /* R_386_TLS_LDM_PLT */ {0, FLG_RE_PLTREL | FLG_RE_PCREL | FLG_RE_TLSLD, 4, 83*ba2be530Sab196087 0, 0}, 84*ba2be530Sab196087 /* R_386_TLS_TPOFF */ {0, FLG_RE_NOTREL, 4, 0, 0}, 85*ba2be530Sab196087 /* R_386_TLS_IE */ {0, FLG_RE_GOTADD | FLG_RE_TLSIE, 4, 0, 0}, 86*ba2be530Sab196087 /* R_386_TLS_GOTIE */ {0, FLG_RE_GOTADD | FLG_RE_TLSIE, 4, 0, 0}, 87*ba2be530Sab196087 /* R_386_TLS_LE */ {0, FLG_RE_TLSLE, 4, 0, 0}, 88*ba2be530Sab196087 /* R_386_TLS_GD */ {0, FLG_RE_GOTADD | FLG_RE_TLSGD, 4, 0, 0}, 89*ba2be530Sab196087 /* R_386_TLS_LDM */ {0, FLG_RE_GOTADD | FLG_RE_TLSLD, 4, 0, 0}, 90*ba2be530Sab196087 /* R_386_16 */ {0, FLG_RE_NOTREL, 2, 0, 0}, 91*ba2be530Sab196087 /* R_386_PC16 */ {0, FLG_RE_PCREL, 2, 0, 0}, 92*ba2be530Sab196087 /* R_386_8 */ {0, FLG_RE_NOTREL, 1, 0, 0}, 93*ba2be530Sab196087 /* R_386_PC8 */ {0, FLG_RE_PCREL, 1, 0, 0}, 94*ba2be530Sab196087 /* R_386_UNKNOWN24 */ {0, FLG_RE_NOTSUP, 0, 0, 0}, 95*ba2be530Sab196087 /* R_386_UNKNOWN25 */ {0, FLG_RE_NOTSUP, 0, 0, 0}, 96*ba2be530Sab196087 /* R_386_UNKNOWN26 */ {0, FLG_RE_NOTSUP, 0, 0, 0}, 97*ba2be530Sab196087 /* R_386_UNKNOWN27 */ {0, FLG_RE_NOTSUP, 0, 0, 0}, 98*ba2be530Sab196087 /* R_386_UNKNOWN28 */ {0, FLG_RE_NOTSUP, 0, 0, 0}, 99*ba2be530Sab196087 /* R_386_UNKNOWN29 */ {0, FLG_RE_NOTSUP, 0, 0, 0}, 100*ba2be530Sab196087 /* R_386_UNKNOWN30 */ {0, FLG_RE_NOTSUP, 0, 0, 0}, 101*ba2be530Sab196087 /* R_386_UNKNOWN31 */ {0, FLG_RE_NOTSUP, 0, 0, 0}, 102*ba2be530Sab196087 /* R_386_TLS_LDO_32 */ {0, FLG_RE_TLSLD, 4, 0, 0}, 103*ba2be530Sab196087 /* R_386_UNKNOWN33 */ {0, FLG_RE_NOTSUP, 0, 0, 0}, 104*ba2be530Sab196087 /* R_386_UNKNOWN34 */ {0, FLG_RE_NOTSUP, 0, 0, 0}, 105*ba2be530Sab196087 /* R_386_TLS_DTPMOD32 */ {0, FLG_RE_NOTREL, 4, 0, 0}, 106*ba2be530Sab196087 /* R_386_TLS_DTPOFF32 */ {0, FLG_RE_NOTREL, 4, 0, 0}, 107*ba2be530Sab196087 /* R_386_UNKONWN37 */ {0, FLG_RE_NOTSUP, 0, 0, 0}, 108*ba2be530Sab196087 /* R_386_SIZE32 */ {0, FLG_RE_SIZE | FLG_RE_VERIFY, 4, 0, 0} 1097c478bd9Sstevel@tonic-gate }; 1107c478bd9Sstevel@tonic-gate 1117c478bd9Sstevel@tonic-gate /* 1127c478bd9Sstevel@tonic-gate * Write a single relocated value to its reference location. 113552ff457Srie * We assume we wish to add the relocation amount, value, to the 1147c478bd9Sstevel@tonic-gate * value of the address already present at the offset. 1157c478bd9Sstevel@tonic-gate * 1167c478bd9Sstevel@tonic-gate * NAME VALUE FIELD CALCULATION 1177c478bd9Sstevel@tonic-gate * 1187c478bd9Sstevel@tonic-gate * R_386_NONE 0 none none 1197c478bd9Sstevel@tonic-gate * R_386_32 1 word32 S + A 1207c478bd9Sstevel@tonic-gate * R_386_PC32 2 word32 S + A - P 1217c478bd9Sstevel@tonic-gate * R_386_GOT32 3 word32 G + A - P 1227c478bd9Sstevel@tonic-gate * R_386_PLT32 4 word32 L + A - P 1237c478bd9Sstevel@tonic-gate * R_386_COPY 5 none none 1247c478bd9Sstevel@tonic-gate * R_386_GLOB_DAT 6 word32 S 1257c478bd9Sstevel@tonic-gate * R_386_JMP_SLOT 7 word32 S 1267c478bd9Sstevel@tonic-gate * R_386_RELATIVE 8 word32 B + A 1277c478bd9Sstevel@tonic-gate * R_386_GOTOFF 9 word32 S + A - GOT 1287c478bd9Sstevel@tonic-gate * R_386_GOTPC 10 word32 GOT + A - P 1297c478bd9Sstevel@tonic-gate * R_386_32PLT 11 word32 L + A 1307c478bd9Sstevel@tonic-gate * R_386_TLS_GD_PLT 12 word32 @tlsgdplt 1317c478bd9Sstevel@tonic-gate * R_386_TLS_LDM_PLT 13 word32 @tlsldmplt 1327c478bd9Sstevel@tonic-gate * R_386_TLS_TPOFF 14 word32 @ntpoff(S) 1337c478bd9Sstevel@tonic-gate * R_386_TLS_IE 15 word32 @indntpoff(S) 1347c478bd9Sstevel@tonic-gate * R_386_TLS_GD 18 word32 @tlsgd(S) 1357c478bd9Sstevel@tonic-gate * R_386_TLS_LDM 19 word32 @tlsldm(S) 136552ff457Srie * R_386_16 20 word16 S + A 137552ff457Srie * R_386_PC16 21 word16 S + A - P 138552ff457Srie * R_386_8 22 word8 S + A 139552ff457Srie * R_386_PC8 23 word8 S + A - P 1407c478bd9Sstevel@tonic-gate * R_386_TLS_LDO_32 32 word32 @dtpoff(S) 1417c478bd9Sstevel@tonic-gate * R_386_TLS_DTPMOD32 35 word32 @dtpmod(S) 1427c478bd9Sstevel@tonic-gate * R_386_TLS_DTPOFF32 36 word32 @dtpoff(S) 1432926dd2eSrie * R_386_SIZE32 38 word32 Z + A 1447c478bd9Sstevel@tonic-gate * 145552ff457Srie * Relocations 0-10 are from Figure 4-4: Relocation Types from the 1467c478bd9Sstevel@tonic-gate * intel ABI. Relocation 11 (R_386_32PLT) is from the C++ intel abi 1477c478bd9Sstevel@tonic-gate * and is in the process of being registered with intel ABI (1/13/94). 1487c478bd9Sstevel@tonic-gate * 1497c478bd9Sstevel@tonic-gate * Relocations R_386_TLS_* are added to support Thread-Local storage 1507c478bd9Sstevel@tonic-gate * as recorded in PSARC/2001/509 1517c478bd9Sstevel@tonic-gate * 1527c478bd9Sstevel@tonic-gate * Relocation calculations: 1537c478bd9Sstevel@tonic-gate * 1547c478bd9Sstevel@tonic-gate * CALCULATION uses the following notation: 1557c478bd9Sstevel@tonic-gate * A the addend used 1567c478bd9Sstevel@tonic-gate * B the base address of the shared object in memory 1577c478bd9Sstevel@tonic-gate * G the offset into the global offset table 1587c478bd9Sstevel@tonic-gate * GOT the address of teh global offset table 1597c478bd9Sstevel@tonic-gate * L the procedure linkage entry 1607c478bd9Sstevel@tonic-gate * P the place of the storage unit being relocated 1617c478bd9Sstevel@tonic-gate * S the value of the symbol 1622926dd2eSrie * Z the size of the symbol whose index resides in the relocation 1632926dd2eSrie * entry 1647c478bd9Sstevel@tonic-gate * 1657c478bd9Sstevel@tonic-gate * @dtlndx(x): Allocate two contiguous entries in the GOT table to hold 1667c478bd9Sstevel@tonic-gate * a Tls_index structure (for passing to __tls_get_addr()). The 1677c478bd9Sstevel@tonic-gate * instructions referencing this entry will be bound to the first 1687c478bd9Sstevel@tonic-gate * of the two GOT entries. 1697c478bd9Sstevel@tonic-gate * 1707c478bd9Sstevel@tonic-gate * @tmndx(x): Allocate two contiguous entries in the GOT table to hold 1717c478bd9Sstevel@tonic-gate * a Tls_index structure (for passing to __tls_get_addr()). The 1727c478bd9Sstevel@tonic-gate * ti_offset field of the Tls_index will be set to 0 (zero) and the 1737c478bd9Sstevel@tonic-gate * ti_module will be filled in at run-time. The call to 1747c478bd9Sstevel@tonic-gate * __tls_get_addr() will return the starting offset of the dynamic 1757c478bd9Sstevel@tonic-gate * TLS block. 1767c478bd9Sstevel@tonic-gate * 1777c478bd9Sstevel@tonic-gate * @dtpoff(x): calculate the tlsoffset relative to the TLS block. 1787c478bd9Sstevel@tonic-gate * 1797c478bd9Sstevel@tonic-gate * @tpoff(x): calculate the tlsoffset relative to the TLS block. 1807c478bd9Sstevel@tonic-gate * 1817c478bd9Sstevel@tonic-gate * @dtpmod(x): calculate the module id of the object containing symbol x. 1827c478bd9Sstevel@tonic-gate * 1837c478bd9Sstevel@tonic-gate * The calculations in the CALCULATION column are assumed to have 1847c478bd9Sstevel@tonic-gate * been performed before calling this function except for the addition of 1857c478bd9Sstevel@tonic-gate * the addresses in the instructions. 1867c478bd9Sstevel@tonic-gate */ 187f3324781Sab196087 #if defined(_KERNEL) 188f3324781Sab196087 #define lml 0 /* Needed by arglist of REL_ERR_* macros */ 1897c478bd9Sstevel@tonic-gate int 190f3324781Sab196087 do_reloc_krtld(uchar_t rtype, uchar_t *off, Xword *value, const char *sym, 191f3324781Sab196087 const char *file) 192f3324781Sab196087 #elif defined(DO_RELOC_LIBLD) 193*ba2be530Sab196087 /*ARGSUSED5*/ 194f3324781Sab196087 int 195f3324781Sab196087 do_reloc_ld(uchar_t rtype, uchar_t *off, Xword *value, const char *sym, 196f3324781Sab196087 const char *file, int bswap, void *lml) 197f3324781Sab196087 #else 198f3324781Sab196087 int 199f3324781Sab196087 do_reloc_rtld(uchar_t rtype, uchar_t *off, Xword *value, const char *sym, 2005aefb655Srie const char *file, void *lml) 201f3324781Sab196087 #endif 2027c478bd9Sstevel@tonic-gate { 2037c478bd9Sstevel@tonic-gate const Rel_entry *rep; 2047c478bd9Sstevel@tonic-gate 2057c478bd9Sstevel@tonic-gate rep = &reloc_table[rtype]; 206552ff457Srie 207552ff457Srie switch (rep->re_fsize) { 208552ff457Srie case 1: 209552ff457Srie /* LINTED */ 210552ff457Srie *((uchar_t *)off) += (uchar_t)(*value); 211552ff457Srie break; 212*ba2be530Sab196087 213552ff457Srie case 2: 214*ba2be530Sab196087 #if defined(DORELOC_NATIVE) 215552ff457Srie /* LINTED */ 216552ff457Srie *((Half *)off) += (Half)(*value); 217*ba2be530Sab196087 #else 218*ba2be530Sab196087 { 219*ba2be530Sab196087 Half v; 220*ba2be530Sab196087 uchar_t *v_bytes = (uchar_t *)&v; 221*ba2be530Sab196087 222*ba2be530Sab196087 if (bswap) { 223*ba2be530Sab196087 UL_ASSIGN_BSWAP_HALF(v_bytes, off); 224*ba2be530Sab196087 v += *value; 225*ba2be530Sab196087 UL_ASSIGN_BSWAP_HALF(off, v_bytes); 226*ba2be530Sab196087 } else { 227*ba2be530Sab196087 UL_ASSIGN_HALF(v_bytes, off); 228*ba2be530Sab196087 v += *value; 229*ba2be530Sab196087 UL_ASSIGN_HALF(off, v_bytes); 230*ba2be530Sab196087 } 231*ba2be530Sab196087 } 232*ba2be530Sab196087 #endif 233552ff457Srie break; 234*ba2be530Sab196087 235552ff457Srie case 4: 236*ba2be530Sab196087 #if defined(DORELOC_NATIVE) 2377c478bd9Sstevel@tonic-gate /* LINTED */ 2387c478bd9Sstevel@tonic-gate *((Xword *)off) += *value; 239*ba2be530Sab196087 #else 240*ba2be530Sab196087 { 241*ba2be530Sab196087 Word v; 242*ba2be530Sab196087 uchar_t *v_bytes = (uchar_t *)&v; 243*ba2be530Sab196087 244*ba2be530Sab196087 if (bswap) { 245*ba2be530Sab196087 UL_ASSIGN_BSWAP_WORD(v_bytes, off); 246*ba2be530Sab196087 v += *value; 247*ba2be530Sab196087 UL_ASSIGN_BSWAP_WORD(off, v_bytes); 248*ba2be530Sab196087 } else { 249*ba2be530Sab196087 UL_ASSIGN_WORD(v_bytes, off); 250*ba2be530Sab196087 v += *value; 251*ba2be530Sab196087 UL_ASSIGN_WORD(off, v_bytes); 252*ba2be530Sab196087 } 253*ba2be530Sab196087 } 254*ba2be530Sab196087 #endif 255552ff457Srie break; 256552ff457Srie default: 257552ff457Srie /* 258552ff457Srie * To keep chkmsg() happy: MSG_INTL(MSG_REL_UNSUPSZ) 259552ff457Srie */ 2605aefb655Srie REL_ERR_UNSUPSZ(lml, file, sym, rtype, rep->re_fsize); 261552ff457Srie return (0); 262552ff457Srie } 2637c478bd9Sstevel@tonic-gate return (1); 2647c478bd9Sstevel@tonic-gate } 265