diff options
Diffstat (limited to 'usr.bin/ldd/ldd_elfxx.c')
| -rw-r--r-- | usr.bin/ldd/ldd_elfxx.c | 269 |
1 files changed, 269 insertions, 0 deletions
diff --git a/usr.bin/ldd/ldd_elfxx.c b/usr.bin/ldd/ldd_elfxx.c new file mode 100644 index 0000000..d5def64 --- /dev/null +++ b/usr.bin/ldd/ldd_elfxx.c @@ -0,0 +1,269 @@ +/* $NetBSD: ldd_elfxx.c,v 1.7 2017/01/10 21:11:25 christos Exp $ */ + +/*- + * Copyright (c) 1998, 2000 The NetBSD Foundation, Inc. + * All rights reserved. + * + * This code is derived from software contributed to The NetBSD Foundation + * by Paul Kranenburg. + * + * 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. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND 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 FOUNDATION OR 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. + */ + +/* + * Copyright 1996 John D. Polstra. + * Copyright 1996 Matt Thomas <matt@3am-software.com> + * 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. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by John Polstra. + * 4. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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. + */ + +#include <sys/cdefs.h> +#ifndef lint +__RCSID("$NetBSD: ldd_elfxx.c,v 1.7 2017/01/10 21:11:25 christos Exp $"); +#endif /* not lint */ + +#include <sys/types.h> +#include <sys/mman.h> +#include <sys/wait.h> +#include <sys/stat.h> + +#include <dirent.h> +#include <err.h> +#include <errno.h> +#include <fcntl.h> +#include <stdarg.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> +#include <ctype.h> + +#include "debug.h" +#include "rtld.h" +#include "ldd.h" + +static void print_needed(Obj_Entry *, const char *, const char *); +static void fmtprint(const char *, Obj_Entry *, const char *, const char *); + +/* + * elfxx_ldd() - bit-size independent ELF ldd implementation. + * returns 0 on success and -1 on failure. + */ +int +ELFNAME(ldd)(int fd, char *path, const char *fmt1, const char *fmt2) +{ + struct stat st; + + if (lseek(fd, 0, SEEK_SET) < 0 || + fstat(fd, &st) < 0) { + _rtld_error("%s: %s", path, strerror(errno)); + return -1; + } + + _rtld_pagesz = sysconf(_SC_PAGESIZE); + +#ifdef RTLD_ARCH_SUBDIR + _rtld_add_paths(path, &_rtld_default_paths, + RTLD_DEFAULT_LIBRARY_PATH "/" RTLD_ARCH_SUBDIR); +#endif + _rtld_add_paths(path, &_rtld_default_paths, RTLD_DEFAULT_LIBRARY_PATH); + + _rtld_paths = NULL; + _rtld_trust = (st.st_mode & (S_ISUID | S_ISGID)) == 0; + if (_rtld_trust) + _rtld_add_paths(path, &_rtld_paths, getenv("LD_LIBRARY_PATH")); + + _rtld_process_hints(path, &_rtld_paths, &_rtld_xforms, _PATH_LD_HINTS); + _rtld_objmain = _rtld_map_object(xstrdup(path), fd, &st); + if (_rtld_objmain == NULL) + return -1; + + _rtld_objmain->path = xstrdup(path); + _rtld_digest_dynamic(path, _rtld_objmain); + + /* Link the main program into the list of objects. */ + *_rtld_objtail = _rtld_objmain; + _rtld_objtail = &_rtld_objmain->next; + ++_rtld_objmain->refcount; + + (void) _rtld_load_needed_objects(_rtld_objmain, 0); + + if (fmt1 == NULL) + printf("%s:\n", _rtld_objmain->path); + main_local = path; + main_progname = _rtld_objmain->path; + print_needed(_rtld_objmain, fmt1, fmt2); + + while (_rtld_objlist != NULL) { + Obj_Entry *obj = _rtld_objlist; + _rtld_objlist = obj->next; + while (obj->rpaths != NULL) { + const Search_Path *rpath = obj->rpaths; + obj->rpaths = rpath->sp_next; + xfree(__UNCONST(rpath->sp_path)); + xfree(__UNCONST(rpath)); + } + while (obj->needed != NULL) { + const Needed_Entry *needed = obj->needed; + obj->needed = needed->next; + xfree(__UNCONST(needed)); + } + (void) munmap(obj->mapbase, obj->mapsize); + xfree(obj->path); + xfree(obj); + } + + _rtld_objmain = NULL; + _rtld_objtail = &_rtld_objlist; + /* Need to free _rtld_paths? */ + + return 0; +} + +void +fmtprint(const char *libname, Obj_Entry *obj, const char *fmt1, + const char *fmt2) +{ + const char *libpath = obj ? obj->path : "not found"; + char libnamebuf[200]; + char *libmajor = NULL; + const char *fmt; + char *cp; + int c; + + if (strncmp(libname, "lib", 3) == 0 && + (cp = strstr(libname, ".so")) != NULL) { + size_t i = cp - (libname + 3); + + if (i >= sizeof(libnamebuf)) + i = sizeof(libnamebuf) - 1; + (void)memcpy(libnamebuf, libname + 3, i); + libnamebuf[i] = '\0'; + if (cp[3] && isdigit((unsigned char)cp[4])) + libmajor = &cp[4]; + libname = libnamebuf; + } + + if (fmt1 == NULL) + fmt1 = libmajor != NULL ? + "\t-l%o.%m => %p\n" : + "\t-l%o => %p\n"; + if (fmt2 == NULL) + fmt2 = "\t%o => %p\n"; + + fmt = libname == libnamebuf ? fmt1 : fmt2; + while ((c = *fmt++) != '\0') { + switch (c) { + default: + putchar(c); + continue; + case '\\': + switch (c = *fmt) { + case '\0': + continue; + case 'n': + putchar('\n'); + break; + case 't': + putchar('\t'); + break; + } + break; + case '%': + switch (c = *fmt) { + case '\0': + continue; + case '%': + default: + putchar(c); + break; + case 'A': + printf("%s", main_local); + break; + case 'a': + printf("%s", main_progname); + break; + case 'o': + printf("%s", libname); + break; + case 'm': + printf("%s", libmajor); + break; + case 'n': + /* XXX: not supported for elf */ + break; + case 'p': + printf("%s", libpath); + break; + case 'x': + printf("%p", obj ? obj->mapbase : 0); + break; + } + break; + } + ++fmt; + } +} + +void +print_needed(Obj_Entry *obj, const char *fmt1, const char *fmt2) +{ + const Needed_Entry *needed; + + for (needed = obj->needed; needed != NULL; needed = needed->next) { + const char *libname = obj->strtab + needed->name; + + if (needed->obj != NULL) { + if (!needed->obj->printed) { + fmtprint(libname, needed->obj, fmt1, fmt2); + needed->obj->printed = 1; + print_needed(needed->obj, fmt1, fmt2); + } + } else { + fmtprint(libname, needed->obj, fmt1, fmt2); + } + } +} |