/* * 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) 1988 AT&T * All Rights Reserved * * * Copyright 2008 Sun Microsystems, Inc. All rights reserved. * Use is subject to license terms. */ #pragma ident "%Z%%M% %I% %E% SMI" #include #include #include #include #include #include #include "_rtld.h" /* * Declarations of global variables used in ld.so. */ Rt_lock rtldlock; /* * Major link-map lists. */ Lm_list lml_main = { 0 }; /* the `main's link map list */ Lm_list lml_rtld = { 0 }; /* rtld's link map list */ /* * Entrance count. Each time ld.so.1 is entered this count is bumped. This * value serves to identify the present ld.so.1 operation. Any ld.so.1 * operation can result in many symbol lookup requests (ie. loading objects and * relocating all symbolic bindings). This count is used to protect against * attempting to re-load a failed lazy load within a single call to ld.so.1, * while allowing such attempts across calls. Should a lazy load fail, the * present operation identifier is saved in the current symbol lookup data * block (Slookup). Should a lazy load fall back operation be triggered, the * identifier in the symbol lookup block is compared to the current ld.so.1 * entry count, and if the two are equal the fall back is skipped. * * With this count, there is a danger of wrap-around, although as an unsigned * 32-bit value, it is highly unlikely that any application could usefully make * 4.3 giga-calls into ld.so.1. The worst that can occur is that a fall back * lazy load isn't triggered. However, most lazy loads that fail typically * continue to fail unless the user takes corrective action (adds the necessary * (fixed) dependencies to the system. */ ulong_t ld_entry_cnt = 0; /* * BEGIN: Exposed to rtld_db, don't change without a coordinated handshake with * librtld_db (remembering that librtld_db must be able to read old as well as * current core files). */ List dynlm_list = { 0, 0 }; /* dynamic list of link-maps */ /* * END: Exposed to rtld_db */ Reglist * reglist = 0; /* list of register symbols */ ulong_t hwcap = 0; /* hardware capabilities */ ulong_t sfcap = 0; /* software capabilities */ /* * Initialized fmap structure. */ static Fmap _fmap = { 0, 0, 0, 0, 0 }; Fmap * fmap = &_fmap; /* initial file mapping info */ /* * Set of integers to track how many of what type of * PLT's have been bound. This is only really interesting * for SPARC since ia32 basically just has the one PLT. */ uint32_t pltcnt21d = 0; uint32_t pltcnt24d = 0; uint32_t pltcntu32 = 0; uint32_t pltcntu44 = 0; uint32_t pltcntfull = 0; uint32_t pltcntfar = 0; /* * Enable technology (via status flags for RTLD) dependent upon whether we're * in a patch or major release build environment. */ uint_t rtld_flags = #ifdef EXPAND_RELATIVE RT_FL_RELATIVE | #endif #ifdef SIEBEL_DISABLE RT_FL_DISFIX_1 | #endif RT_FL_NOCONCUR; uint_t rtld_flags2 = 0; /* * Various other global data. */ Lc_desc glcs[CI_MAX]; /* global external interfaces */ const char *procname = (const char *)0; const char *rtldname = MSG_ORIG(MSG_FIL_RTLD); char *lasterr = (char *)0; /* string describing last error */ /* cleared by each dlerror() */ Interp *interp = 0; /* ELF interpreter info */ List hdl_list[HDLIST_SZ+2]; /* dlopen() handle list */ size_t syspagsz = 0; /* system page size */ unsigned long at_flags = 0; /* machine specific file flags */ char *platform = 0; /* platform name from AT_SUN_PLATFORM */ size_t platform_sz = 0; /* platform string length */ Uts_desc *uts; /* utsname descriptor */ Isa_desc *isa; /* isalist descriptor */ uint_t audit_argcnt = 64; /* no. of stack args to copy (default */ /* is all) */ Audit_desc *auditors = 0; /* global auditors (LD_AUDIT) */ const char *rpl_audit = 0; /* replaceable LD_AUDIT string */ const char *rpl_debug = 0; /* replaceable LD_DEBUG string */ const char *rpl_ldflags = 0; /* replaceable LD_FLAGS string */ const char *rpl_libpath = 0; /* replaceable LD_LIBRARY_PATH string */ Pnode *rpl_libdirs = 0; /* and associated Pnode list */ const char *rpl_preload = 0; /* replaceable LD_PRELOAD string */ const char *prm_audit = 0; /* permanent LD_AUDIT string */ const char *prm_debug = 0; /* permanent LD_DEBUG string */ const char *prm_ldflags = 0; /* permanent LD_FLAGS string */ const char *prm_libpath = 0; /* permanent LD_LIBRARY_PATH string */ Pnode *prm_libdirs = 0; /* and associated Pnode list */ const char *prm_preload = 0; /* permanent LD_PRELOAD string */ uint_t env_info = 0; /* information regarding environment */ /* variables */ int killsig = SIGKILL; /* signal sent on fatal exit */ /* * Note, the debugging descriptor interposes on the default definition provided * by liblddbg. This is required as ld.so.1 must only have outstanding relative * relocations. */ static Dbg_desc _dbg_desc = {0, 0, 0}; Dbg_desc *dbg_desc = &_dbg_desc; /* debugging descriptor */ const char *dbg_file = 0; /* debugging directed to file */ #pragma weak environ = _environ /* environ for PLT tracing - we */ char **_environ = 0; /* supply the pair to satisfy any */ /* libc requirements (hwmuldiv) */ const char *profile_name; /* object being profiled */ const char *profile_out; /* profile output file */ const char *profile_lib; /* audit library to perform profile */ unsigned char search_rules[] = { /* dependency search rules */ RPLENV, /* replaceable LD_LIBRARY_PATH */ PRMENV, /* permanent LD_LIBRARY_PATH */ RUNPATH, /* callers runpath */ DEFAULT, /* default library path */ 0 }; Dl_argsinfo argsinfo = { 0 }; /* process argument, environment and */ /* auxv information. */ /* * Frequently used messages are cached here to reduce _dgettext() overhead and * also provide for resetting should the locale change (see _ld_libc()). */ const char *err_strs[ERR_NUM] = { 0 }; const char *nosym_str = 0; /* * Rejection error message tables. */ const Msg ldd_reject[] = { MSG_STR_EMPTY, MSG_LDD_REJ_MACH, /* MSG_INTL(MSG_LDD_REJ_MACH) */ MSG_LDD_REJ_CLASS, /* MSG_INTL(MSG_LDD_REJ_CLASS) */ MSG_LDD_REJ_DATA, /* MSG_INTL(MSG_LDD_REJ_DATA) */ MSG_LDD_REJ_TYPE, /* MSG_INTL(MSG_LDD_REJ_TYPE) */ MSG_LDD_REJ_BADFLAG, /* MSG_INTL(MSG_LDD_REJ_BADFLAG) */ MSG_LDD_REJ_MISFLAG, /* MSG_INTL(MSG_LDD_REJ_MISFLAG) */ MSG_LDD_REJ_VERSION, /* MSG_INTL(MSG_LDD_REJ_VERSION) */ MSG_LDD_REJ_HAL, /* MSG_INTL(MSG_LDD_REJ_HAL) */ MSG_LDD_REJ_US3, /* MSG_INTL(MSG_LDD_REJ_US3) */ MSG_LDD_REJ_STR, /* MSG_INTL(MSG_LDD_REJ_STR) */ MSG_LDD_REJ_UNKFILE, /* MSG_INTL(MSG_LDD_REJ_UNKFILE) */ MSG_LDD_REJ_HWCAP_1, /* MSG_INTL(MSG_LDD_REJ_HWCAP_1) */ }; const Msg err_reject[] = { MSG_STR_EMPTY, MSG_ERR_REJ_MACH, /* MSG_INTL(MSG_ERR_REJ_MACH) */ MSG_ERR_REJ_CLASS, /* MSG_INTL(MSG_ERR_REJ_CLASS) */ MSG_ERR_REJ_DATA, /* MSG_INTL(MSG_ERR_REJ_DATA) */ MSG_ERR_REJ_TYPE, /* MSG_INTL(MSG_ERR_REJ_TYPE) */ MSG_ERR_REJ_BADFLAG, /* MSG_INTL(MSG_ERR_REJ_BADFLAG) */ MSG_ERR_REJ_MISFLAG, /* MSG_INTL(MSG_ERR_REJ_MISFLAG) */ MSG_ERR_REJ_VERSION, /* MSG_INTL(MSG_ERR_REJ_VERSION) */ MSG_ERR_REJ_HAL, /* MSG_INTL(MSG_ERR_REJ_HAL) */ MSG_ERR_REJ_US3, /* MSG_INTL(MSG_ERR_REJ_US3) */ MSG_ERR_REJ_STR, /* MSG_INTL(MSG_ERR_REJ_STR) */ MSG_ERR_REJ_UNKFILE, /* MSG_INTL(MSG_ERR_REJ_UNKFILE) */ MSG_ERR_REJ_HWCAP_1, /* MSG_INTL(MSG_ERR_REJ_HWCAP_1) */ };