diff options
Diffstat (limited to 'ldso/ldso/readelflib1.c')
| -rw-r--r-- | ldso/ldso/readelflib1.c | 96 |
1 files changed, 59 insertions, 37 deletions
diff --git a/ldso/ldso/readelflib1.c b/ldso/ldso/readelflib1.c index c5e7607e0..8c2314184 100644 --- a/ldso/ldso/readelflib1.c +++ b/ldso/ldso/readelflib1.c @@ -1,21 +1,34 @@ -/* Load an ELF sharable library into memory. - - Copyright (C) 1993-1996, Eric Youngdale. - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2, or (at your option) - any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ - +/* vi: set sw=4 ts=4: */ +/* Program to load an ELF binary on a linux system, and run it + * after resolving ELF shared library symbols + * + * Copyright (c) 1994-2000 Eric Youngdale, Peter MacDonald, + * David Engel, Hongjiu Lu and Mitch D'Souza + * Copyright (C) 2001-2002, Erik Andersen + * + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. The name of the above contributors may not be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ /* This file contains the helper routines to load an ELF sharable @@ -180,8 +193,8 @@ struct elf_resolve *_dl_load_shared_library(int secure, struct dyn_elf **rpnt, pnt++; } -#ifdef DL_DEBUG - _dl_dprintf(2, "searching for library: '%s'\n", libname); +#ifdef LD_DEBUG + _dl_dprintf(_dl_debug_file, "searching for library: '%s'\n", libname); #endif /* If the filename has any '/', try it straight and leave it at that. For IBCS2 compatibility under linux, we substitute the string @@ -204,8 +217,8 @@ struct elf_resolve *_dl_load_shared_library(int secure, struct dyn_elf **rpnt, if (pnt) { pnt += (unsigned long) tpnt->loadaddr + tpnt->dynamic_info[DT_STRTAB]; -#ifdef DL_DEBUG - _dl_dprintf(2, "searching RPATH: '%s'\n", pnt); +#ifdef LD_DEBUG + _dl_dprintf(_dl_debug_file, "searching RPATH: '%s'\n", pnt); #endif if ((tpnt1 = search_for_named_library(libname, secure, pnt, rpnt)) != NULL) { @@ -217,8 +230,8 @@ struct elf_resolve *_dl_load_shared_library(int secure, struct dyn_elf **rpnt, /* Check in LD_{ELF_}LIBRARY_PATH, if specified and allowed */ if (_dl_library_path) { -#ifdef DL_DEBUG - _dl_dprintf(2, "searching _dl_library_path: '%s'\n", _dl_library_path); +#ifdef LD_DEBUG + _dl_dprintf(_dl_debug_file, "searching _dl_library_path: '%s'\n", _dl_library_path); #endif if ((tpnt1 = search_for_named_library(libname, secure, _dl_library_path, rpnt)) != NULL) { @@ -251,8 +264,8 @@ struct elf_resolve *_dl_load_shared_library(int secure, struct dyn_elf **rpnt, /* Look for libraries wherever the shared library loader * was installed */ -#ifdef DL_DEBUG - _dl_dprintf(2, "searching in ldso dir: %s\n", _dl_ldsopath); +#ifdef LD_DEBUG + _dl_dprintf(_dl_debug_file, "searching in ldso dir: %s\n", _dl_ldsopath); #endif if ((tpnt1 = search_for_named_library(libname, secure, _dl_ldsopath, rpnt)) != NULL) { @@ -262,8 +275,8 @@ struct elf_resolve *_dl_load_shared_library(int secure, struct dyn_elf **rpnt, /* Lastly, search the standard list of paths for the library. This list must exactly match the list in uClibc/ldso/util/ldd.c */ -#ifdef DL_DEBUG - _dl_dprintf(2, "searching full lib path list\n"); +#ifdef LD_DEBUG + _dl_dprintf(_dl_debug_file, "searching full lib path list\n"); #endif if ((tpnt1 = search_for_named_library(libname, secure, UCLIBC_TARGET_PREFIX "/usr/lib:" @@ -282,8 +295,8 @@ goof: if (_dl_internal_error_number) _dl_error_number = _dl_internal_error_number; else - _dl_error_number = DL_ERROR_NOFILE; -#ifdef DL_DEBUG + _dl_error_number = LD_ERROR_NOFILE; +#ifdef LD_DEBUG _dl_dprintf(2, "Bummer: could not find '%s'!\n", libname); #endif return NULL; @@ -323,6 +336,7 @@ struct elf_resolve *_dl_load_elf_shared_library(int secure, (*rpnt)->next = (struct dyn_elf *) _dl_malloc(sizeof(struct dyn_elf)); _dl_memset((*rpnt)->next, 0, sizeof(*((*rpnt)->next))); + (*rpnt)->next->prev = (*rpnt); *rpnt = (*rpnt)->next; (*rpnt)->dyn = tpnt; tpnt->symbol_scope = _dl_symbol_tables; @@ -352,7 +366,7 @@ struct elf_resolve *_dl_load_elf_shared_library(int secure, */ _dl_dprintf(2, "%s: can't open '%s'\n", _dl_progname, libname); #endif - _dl_internal_error_number = DL_ERROR_NOFILE; + _dl_internal_error_number = LD_ERROR_NOFILE; return NULL; } @@ -365,7 +379,7 @@ struct elf_resolve *_dl_load_elf_shared_library(int secure, { _dl_dprintf(2, "%s: '%s' is not an ELF file\n", _dl_progname, libname); - _dl_internal_error_number = DL_ERROR_NOTELF; + _dl_internal_error_number = LD_ERROR_NOTELF; _dl_close(infile); return NULL; }; @@ -377,7 +391,7 @@ struct elf_resolve *_dl_load_elf_shared_library(int secure, )) { _dl_internal_error_number = - (epnt->e_type != ET_DYN ? DL_ERROR_NOTDYN : DL_ERROR_NOTMAGIC); + (epnt->e_type != ET_DYN ? LD_ERROR_NOTDYN : LD_ERROR_NOTMAGIC); _dl_dprintf(2, "%s: '%s' is not an ELF executable for " ELF_TARGET "\n", _dl_progname, libname); _dl_close(infile); @@ -424,7 +438,7 @@ struct elf_resolve *_dl_load_elf_shared_library(int secure, maxvma - minvma, PROT_NONE, flags | MAP_ANONYMOUS, -1, 0); if (_dl_mmap_check_error(status)) { _dl_dprintf(2, "%s: can't map %s\n", _dl_progname, libname); - _dl_internal_error_number = DL_ERROR_MMAP_FAILED; + _dl_internal_error_number = LD_ERROR_MMAP_FAILED; _dl_close(infile); return NULL; }; @@ -457,7 +471,7 @@ struct elf_resolve *_dl_load_elf_shared_library(int secure, if (_dl_mmap_check_error(status)) { _dl_dprintf(2, "%s: can't map '%s'\n", _dl_progname, libname); - _dl_internal_error_number = DL_ERROR_MMAP_FAILED; + _dl_internal_error_number = LD_ERROR_MMAP_FAILED; _dl_munmap((char *) libaddr, maxvma - minvma); _dl_close(infile); return NULL; @@ -488,7 +502,7 @@ struct elf_resolve *_dl_load_elf_shared_library(int secure, infile, ppnt->p_offset & OFFS_ALIGN); if (_dl_mmap_check_error(status)) { _dl_dprintf(2, "%s: can't map '%s'\n", _dl_progname, libname); - _dl_internal_error_number = DL_ERROR_MMAP_FAILED; + _dl_internal_error_number = LD_ERROR_MMAP_FAILED; _dl_munmap((char *) libaddr, maxvma - minvma); _dl_close(infile); return NULL; @@ -516,7 +530,7 @@ struct elf_resolve *_dl_load_elf_shared_library(int secure, /* Start by scanning the dynamic section to get all of the pointers */ if (!dynamic_addr) { - _dl_internal_error_number = DL_ERROR_NODYNAMIC; + _dl_internal_error_number = LD_ERROR_NODYNAMIC; _dl_dprintf(2, "%s: '%s' is missing a dynamic section\n", _dl_progname, libname); return NULL; @@ -580,6 +594,7 @@ struct elf_resolve *_dl_load_elf_shared_library(int secure, (*rpnt)->next = (struct dyn_elf *) _dl_malloc(sizeof(struct dyn_elf)); _dl_memset((*rpnt)->next, 0, sizeof(*((*rpnt)->next))); + (*rpnt)->next->prev = (*rpnt); *rpnt = (*rpnt)->next; (*rpnt)->dyn = tpnt; tpnt->symbol_scope = _dl_symbol_tables; @@ -626,6 +641,10 @@ int _dl_copy_fixups(struct dyn_elf *rpnt) return goof; tpnt->init_flag |= COPY_RELOCS_DONE; +#if defined (SUPPORT_LD_DEBUG) + if(_dl_debug) _dl_dprintf(_dl_debug_file,"\nrelocation copy fixups: %s", tpnt->libname); +#endif + #ifdef ELF_USES_RELOCA goof += _dl_parse_copy_information(rpnt, tpnt->dynamic_info[DT_RELA], tpnt->dynamic_info[DT_RELASZ], 0); @@ -635,5 +654,8 @@ int _dl_copy_fixups(struct dyn_elf *rpnt) tpnt->dynamic_info[DT_RELSZ], 0); #endif +#if defined (SUPPORT_LD_DEBUG) + if(_dl_debug) _dl_dprintf(_dl_debug_file,"\nrelocation copy fixups: %s; finished\n\n", tpnt->libname); +#endif return goof; } |