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 */ 215aefb655Srie 227c478bd9Sstevel@tonic-gate /* 2356deab07SRod Evans * Copyright 2009 Sun Microsystems, Inc. All rights reserved. 247c478bd9Sstevel@tonic-gate * Use is subject to license terms. 257c478bd9Sstevel@tonic-gate */ 267257d1b4Sraf 277257d1b4Sraf /* 287257d1b4Sraf * Copyright (c) 1988 AT&T 297257d1b4Sraf * All Rights Reserved 307257d1b4Sraf */ 31*ebb8ac07SRobert Mustacchi /* 32*ebb8ac07SRobert Mustacchi * Copyright (c) 2012, Joyent, Inc. All rights reserved. 33*ebb8ac07SRobert Mustacchi */ 347257d1b4Sraf 357c478bd9Sstevel@tonic-gate /* 367c478bd9Sstevel@tonic-gate * SPARCV9-specific setup routine - relocate ld.so's symbols, setup its 377c478bd9Sstevel@tonic-gate * environment, map in loadable sections of the executable. 387c478bd9Sstevel@tonic-gate * 397c478bd9Sstevel@tonic-gate * Takes base address ld.so was loaded at, address of ld.so's dynamic 407c478bd9Sstevel@tonic-gate * structure, address of process environment pointers, address of auxiliary 417c478bd9Sstevel@tonic-gate * vector and * argv[0] (process name). 427c478bd9Sstevel@tonic-gate * If errors occur, send process signal - otherwise 437c478bd9Sstevel@tonic-gate * return executable's entry point to the bootstrap routine. 447c478bd9Sstevel@tonic-gate */ 457c478bd9Sstevel@tonic-gate 467c478bd9Sstevel@tonic-gate #include <signal.h> 477c478bd9Sstevel@tonic-gate #include <stdlib.h> 487c478bd9Sstevel@tonic-gate #include <sys/auxv.h> 497c478bd9Sstevel@tonic-gate #include <sys/types.h> 507c478bd9Sstevel@tonic-gate #include <sys/stat.h> 517c478bd9Sstevel@tonic-gate #include <link.h> 527c478bd9Sstevel@tonic-gate #include <dlfcn.h> 537c478bd9Sstevel@tonic-gate #include "_rtld.h" 547c478bd9Sstevel@tonic-gate #include "_audit.h" 557c478bd9Sstevel@tonic-gate #include "msg.h" 567c478bd9Sstevel@tonic-gate 577c478bd9Sstevel@tonic-gate /* VARARGS */ 587c478bd9Sstevel@tonic-gate unsigned long 597c478bd9Sstevel@tonic-gate _setup(Boot *ebp, Dyn *ld_dyn) 607c478bd9Sstevel@tonic-gate { 6156deab07SRod Evans ulong_t reladdr, relacount, ld_base = 0; 6256deab07SRod Evans ulong_t relaent = 0; 6356deab07SRod Evans ulong_t strtab, soname, interp_base = 0; 647c478bd9Sstevel@tonic-gate char *_rt_name, **_envp, **_argv; 6556deab07SRod Evans int _syspagsz = 0, fd = -1; 66*ebb8ac07SRobert Mustacchi uint_t _flags = 0; 67*ebb8ac07SRobert Mustacchi uint_t hwcap[2] = { 0, 0 }; 687c478bd9Sstevel@tonic-gate Dyn *dyn_ptr; 6956deab07SRod Evans Phdr *phdr = NULL; 707c478bd9Sstevel@tonic-gate Rt_map *lmp; 717c478bd9Sstevel@tonic-gate auxv_t *auxv, *_auxv; 72f48205beScasper uid_t uid = (uid_t)-1, euid = (uid_t)-1; 73f48205beScasper gid_t gid = (gid_t)-1, egid = (gid_t)-1; 7456deab07SRod Evans char *_platform = NULL, *_execname = NULL, *_emulator = NULL; 757c478bd9Sstevel@tonic-gate int auxflags = -1; 767c478bd9Sstevel@tonic-gate 777c478bd9Sstevel@tonic-gate /* 787c478bd9Sstevel@tonic-gate * Scan the bootstrap structure to pick up the basics. 797c478bd9Sstevel@tonic-gate */ 807c478bd9Sstevel@tonic-gate for (; ebp->eb_tag != EB_NULL; ebp++) 817c478bd9Sstevel@tonic-gate switch (ebp->eb_tag) { 827c478bd9Sstevel@tonic-gate case EB_LDSO_BASE: 837c478bd9Sstevel@tonic-gate ld_base = (unsigned long)ebp->eb_un.eb_val; 847c478bd9Sstevel@tonic-gate break; 857c478bd9Sstevel@tonic-gate case EB_ARGV: 867c478bd9Sstevel@tonic-gate _argv = (char **)ebp->eb_un.eb_ptr; 877c478bd9Sstevel@tonic-gate break; 887c478bd9Sstevel@tonic-gate case EB_ENVP: 897c478bd9Sstevel@tonic-gate _envp = (char **)ebp->eb_un.eb_ptr; 907c478bd9Sstevel@tonic-gate break; 917c478bd9Sstevel@tonic-gate case EB_AUXV: 927c478bd9Sstevel@tonic-gate _auxv = (auxv_t *)ebp->eb_un.eb_ptr; 937c478bd9Sstevel@tonic-gate break; 947c478bd9Sstevel@tonic-gate case EB_PAGESIZE: 957c478bd9Sstevel@tonic-gate _syspagsz = (int)ebp->eb_un.eb_val; 967c478bd9Sstevel@tonic-gate break; 977c478bd9Sstevel@tonic-gate } 987c478bd9Sstevel@tonic-gate 997c478bd9Sstevel@tonic-gate /* 1007c478bd9Sstevel@tonic-gate * Search the aux. vector for the information passed by exec. 1017c478bd9Sstevel@tonic-gate */ 1027c478bd9Sstevel@tonic-gate for (auxv = _auxv; auxv->a_type != AT_NULL; auxv++) { 1037c478bd9Sstevel@tonic-gate switch (auxv->a_type) { 1047c478bd9Sstevel@tonic-gate case AT_EXECFD: 1057c478bd9Sstevel@tonic-gate /* this is the old exec that passes a file descriptor */ 1067c478bd9Sstevel@tonic-gate fd = (int)auxv->a_un.a_val; 1077c478bd9Sstevel@tonic-gate break; 1087c478bd9Sstevel@tonic-gate case AT_FLAGS: 1097c478bd9Sstevel@tonic-gate /* processor flags (MAU available, etc) */ 11056deab07SRod Evans _flags = auxv->a_un.a_val; 1117c478bd9Sstevel@tonic-gate break; 1127c478bd9Sstevel@tonic-gate case AT_PAGESZ: 1137c478bd9Sstevel@tonic-gate /* system page size */ 1147c478bd9Sstevel@tonic-gate _syspagsz = (int)auxv->a_un.a_val; 1157c478bd9Sstevel@tonic-gate break; 1167c478bd9Sstevel@tonic-gate case AT_PHDR: 1177c478bd9Sstevel@tonic-gate /* address of the segment table */ 1187c478bd9Sstevel@tonic-gate phdr = (Phdr *)auxv->a_un.a_ptr; 1197c478bd9Sstevel@tonic-gate break; 1207c478bd9Sstevel@tonic-gate case AT_BASE: 1217c478bd9Sstevel@tonic-gate /* interpreter base address */ 1227c478bd9Sstevel@tonic-gate if (ld_base == 0) 1237c478bd9Sstevel@tonic-gate ld_base = auxv->a_un.a_val; 1247c478bd9Sstevel@tonic-gate interp_base = auxv->a_un.a_val; 1257c478bd9Sstevel@tonic-gate break; 1267c478bd9Sstevel@tonic-gate case AT_SUN_UID: 1277c478bd9Sstevel@tonic-gate /* effective user id for the executable */ 1287c478bd9Sstevel@tonic-gate euid = (uid_t)auxv->a_un.a_val; 1297c478bd9Sstevel@tonic-gate break; 1307c478bd9Sstevel@tonic-gate case AT_SUN_RUID: 1317c478bd9Sstevel@tonic-gate /* real user id for the executable */ 1327c478bd9Sstevel@tonic-gate uid = (uid_t)auxv->a_un.a_val; 1337c478bd9Sstevel@tonic-gate break; 1347c478bd9Sstevel@tonic-gate case AT_SUN_GID: 1357c478bd9Sstevel@tonic-gate /* effective group id for the executable */ 1367c478bd9Sstevel@tonic-gate egid = (gid_t)auxv->a_un.a_val; 1377c478bd9Sstevel@tonic-gate break; 1387c478bd9Sstevel@tonic-gate case AT_SUN_RGID: 1397c478bd9Sstevel@tonic-gate /* real group id for the executable */ 1407c478bd9Sstevel@tonic-gate gid = (gid_t)auxv->a_un.a_val; 1417c478bd9Sstevel@tonic-gate break; 1427c478bd9Sstevel@tonic-gate case AT_SUN_PLATFORM: 1437c478bd9Sstevel@tonic-gate /* platform name */ 1447c478bd9Sstevel@tonic-gate _platform = auxv->a_un.a_ptr; 1457c478bd9Sstevel@tonic-gate break; 1467c478bd9Sstevel@tonic-gate case AT_SUN_EXECNAME: 1477c478bd9Sstevel@tonic-gate /* full pathname of execed object */ 1487c478bd9Sstevel@tonic-gate _execname = auxv->a_un.a_ptr; 1497c478bd9Sstevel@tonic-gate break; 1507c478bd9Sstevel@tonic-gate case AT_SUN_AUXFLAGS: 15156deab07SRod Evans /* auxiliary flags */ 1527c478bd9Sstevel@tonic-gate auxflags = (int)auxv->a_un.a_val; 1537c478bd9Sstevel@tonic-gate break; 1547c478bd9Sstevel@tonic-gate case AT_SUN_HWCAP: 15556deab07SRod Evans /* hardware capabilities */ 156*ebb8ac07SRobert Mustacchi hwcap[0] = (uint_t)auxv->a_un.a_val; 157*ebb8ac07SRobert Mustacchi break; 158*ebb8ac07SRobert Mustacchi case AT_SUN_HWCAP2: 159*ebb8ac07SRobert Mustacchi /* hardware capabilities */ 160*ebb8ac07SRobert Mustacchi hwcap[1] = (uint_t)auxv->a_un.a_val; 1617c478bd9Sstevel@tonic-gate break; 16207678296Ssl108498 case AT_SUN_EMULATOR: 16307678296Ssl108498 /* name of emulation library, if any */ 16407678296Ssl108498 _emulator = auxv->a_un.a_ptr; 16507678296Ssl108498 break; 1667c478bd9Sstevel@tonic-gate } 1677c478bd9Sstevel@tonic-gate } 1687c478bd9Sstevel@tonic-gate 1697c478bd9Sstevel@tonic-gate /* 1707c478bd9Sstevel@tonic-gate * Get needed info from ld.so's dynamic structure. 1717c478bd9Sstevel@tonic-gate */ 1727c478bd9Sstevel@tonic-gate /* LINTED */ 1737c478bd9Sstevel@tonic-gate dyn_ptr = (Dyn *)((char *)ld_dyn + ld_base); 1747c478bd9Sstevel@tonic-gate for (ld_dyn = dyn_ptr; ld_dyn->d_tag != DT_NULL; ld_dyn++) { 1757c478bd9Sstevel@tonic-gate switch (ld_dyn->d_tag) { 1767c478bd9Sstevel@tonic-gate case DT_RELA: 1777c478bd9Sstevel@tonic-gate reladdr = ld_dyn->d_un.d_ptr + ld_base; 1787c478bd9Sstevel@tonic-gate break; 1797c478bd9Sstevel@tonic-gate case DT_RELACOUNT: 1807c478bd9Sstevel@tonic-gate relacount = ld_dyn->d_un.d_val; 1817c478bd9Sstevel@tonic-gate break; 1827c478bd9Sstevel@tonic-gate case DT_RELAENT: 1837c478bd9Sstevel@tonic-gate relaent = ld_dyn->d_un.d_val; 1847c478bd9Sstevel@tonic-gate break; 1857c478bd9Sstevel@tonic-gate case DT_STRTAB: 1867c478bd9Sstevel@tonic-gate strtab = ld_dyn->d_un.d_ptr + ld_base; 1877c478bd9Sstevel@tonic-gate break; 1887c478bd9Sstevel@tonic-gate case DT_SONAME: 1897c478bd9Sstevel@tonic-gate soname = ld_dyn->d_un.d_val; 1907c478bd9Sstevel@tonic-gate break; 1917c478bd9Sstevel@tonic-gate } 1927c478bd9Sstevel@tonic-gate } 1937c478bd9Sstevel@tonic-gate _rt_name = (char *)strtab + soname; 1947c478bd9Sstevel@tonic-gate 1957c478bd9Sstevel@tonic-gate /* 19656deab07SRod Evans * If we don't have a RELAENT, just assume the size. 1977c478bd9Sstevel@tonic-gate */ 1987c478bd9Sstevel@tonic-gate if (relaent == 0) 1997c478bd9Sstevel@tonic-gate relaent = sizeof (Rela); 2007c478bd9Sstevel@tonic-gate 2017c478bd9Sstevel@tonic-gate /* 20256deab07SRod Evans * As all global symbol references within ld.so.1 are protected 20356deab07SRod Evans * (symbolic), only RELATIVE and JMPSLOT relocations should be left 20456deab07SRod Evans * to process at runtime. Process all relative relocations now. 2057c478bd9Sstevel@tonic-gate */ 2067c478bd9Sstevel@tonic-gate for (; relacount; relacount--) { 2077c478bd9Sstevel@tonic-gate ulong_t roffset; 2087c478bd9Sstevel@tonic-gate 2097c478bd9Sstevel@tonic-gate roffset = ((Rela *)reladdr)->r_offset + ld_base; 2107c478bd9Sstevel@tonic-gate *((ulong_t *)roffset) = ld_base + 2117c478bd9Sstevel@tonic-gate ((Rela *)reladdr)->r_addend; 2127c478bd9Sstevel@tonic-gate reladdr += relaent; 2137c478bd9Sstevel@tonic-gate } 2147c478bd9Sstevel@tonic-gate 2157c478bd9Sstevel@tonic-gate /* 21607678296Ssl108498 * If an emulation library is being used, use that as the linker's 21707678296Ssl108498 * effective executable name. The real executable is not linked by this 21807678296Ssl108498 * linker. 21907678296Ssl108498 */ 22007678296Ssl108498 if (_emulator != NULL) { 22107678296Ssl108498 _execname = _emulator; 22207678296Ssl108498 rtld_flags2 |= RT_FL2_BRANDED; 22307678296Ssl108498 } 22407678296Ssl108498 22507678296Ssl108498 /* 2267c478bd9Sstevel@tonic-gate * Continue with generic startup processing. 2277c478bd9Sstevel@tonic-gate */ 22841072f3cSrie if ((lmp = setup((char **)_envp, (auxv_t *)_auxv, _flags, _platform, 22956deab07SRod Evans _syspagsz, _rt_name, ld_base, interp_base, fd, phdr, 23056deab07SRod Evans _execname, _argv, uid, euid, gid, egid, NULL, auxflags, 231*ebb8ac07SRobert Mustacchi hwcap)) == NULL) { 2327c478bd9Sstevel@tonic-gate rtldexit(&lml_main, 1); 2337c478bd9Sstevel@tonic-gate } 2347c478bd9Sstevel@tonic-gate 2357c478bd9Sstevel@tonic-gate return (LM_ENTRY_PT(lmp)()); 2367c478bd9Sstevel@tonic-gate } 237