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-rw-r--r--utils/.cvsignore4
-rw-r--r--utils/Makefile95
-rw-r--r--utils/bswap.h54
-rw-r--r--utils/ldconfig.c900
-rw-r--r--utils/ldd.c664
-rw-r--r--utils/readelf.c348
-rw-r--r--utils/readsoname.c63
-rw-r--r--utils/readsoname.h4
-rw-r--r--utils/readsoname2.c115
9 files changed, 2247 insertions, 0 deletions
diff --git a/utils/.cvsignore b/utils/.cvsignore
new file mode 100644
index 000000000..ffa8a1a88
--- /dev/null
+++ b/utils/.cvsignore
@@ -0,0 +1,4 @@
+ldd
+readelf
+ldconfig
+elf.h
diff --git a/utils/Makefile b/utils/Makefile
new file mode 100644
index 000000000..3d0a5c3a9
--- /dev/null
+++ b/utils/Makefile
@@ -0,0 +1,95 @@
+# Makefile for uClibc
+#
+# Copyright (C) 2000-2003 Erik Andersen <andersen@uclibc.org>
+#
+# This program is free software; you can redistribute it and/or modify it under
+# the terms of the GNU Library General Public License as published by the Free
+# Software Foundation; either version 2 of the License, 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 Library General Public License for more
+# details.
+#
+# You should have received a copy of the GNU Library General Public License
+# along with this program; if not, write to the Free Software Foundation, Inc.,
+# 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+# Pull in the user's uClibc configuration, but do not
+# include Rules.mak.....
+TOPDIR=../
+include $(TOPDIR).config
+
+# A nifty macro to make testing gcc features easier
+check_gcc=$(shell if $(CC) $(1) -S -o /dev/null -xc /dev/null > /dev/null 2>&1; \
+ then echo "$(1)"; else echo "$(2)"; fi)
+
+# use '-Os' optimization if available, else use -O2, allow Config to override
+OPTIMIZATION+=$(call check_gcc,-Os,-O2)
+XWARNINGS=$(subst ",, $(strip $(WARNINGS))) -Wstrict-prototypes -Wno-trigraphs -fno-strict-aliasing
+
+MAJOR_VERSION:=0
+UCLIBC_LDSO:=ld-uClibc.so.$(MAJOR_VERSION)
+
+ifndef CROSS
+CROSS=
+endif
+CC= $(CROSS)gcc
+AR= $(CROSS)ar
+LD= $(CROSS)ld
+NM= $(CROSS)nm
+STRIP= $(CROSS)strip
+LN=ln
+
+ifeq ($(DODEBUG),y)
+ CFLAGS = $(XWARNINGS) -O0 -g3
+ LDFLAGS =
+else
+ CFLAGS=$(XWARNINGS) $(OPTIMIZATION)
+ LDFLAGS = -s
+endif
+
+# Make certain these contain a final "/", but no "//"s.
+RUNTIME_PREFIX:=$(strip $(subst //,/, $(subst ,/, $(subst ",, $(strip $(RUNTIME_PREFIX))))))
+DEVEL_PREFIX:=$(strip $(subst //,/, $(subst ,/, $(subst ",, $(strip $(DEVEL_PREFIX))))))
+export RUNTIME_PREFIX DEVEL_PREFIX
+
+
+TARGETS = ldd ldconfig readelf
+
+ifeq ($(strip $(LDSO_LDD_SUPPORT)),y)
+XXFLAGS = -D__LDSO_LDD_SUPPORT
+endif
+
+ifeq ($(strip $(HAVE_SHARED)),y)
+all: $(TARGETS)
+else
+all:
+endif
+
+headers:
+ $(LN) -fs $(TOPDIR)include/elf.h
+
+readelf: readelf.c
+ $(CC) $(CFLAGS) -Wl,-s $^ -o $@ $(LDADD_LIBFLOAT)
+ $(STRIP) -x -R .note -R .comment $@
+
+ldconfig: ldconfig.c readsoname.c
+ $(CC) $(CFLAGS) $(XXFLAGS) -Wl,-s \
+ -DUCLIBC_RUNTIME_PREFIX=$(R_PREFIX) \
+ -DUCLIBC_LDSO=$(UCLIBC_LDSO) -I. -I../ldso/include \
+ $^ -o $@ $(LDADD_LIBFLOAT)
+ $(STRIP) -x -R .note -R .comment $@
+
+ldd: ldd.c
+ $(CC) $(CFLAGS) $(XXFLAGS) -Wl,-s \
+ -DUCLIBC_RUNTIME_PREFIX=$(R_PREFIX) \
+ -DUCLIBC_LDSO=$(UCLIBC_LDSO) \
+ $^ -o $@ $(LDADD_LIBFLOAT)
+ $(STRIP) -x -R .note -R .comment $@
+
+clean:
+ $(RM) $(TARGETS) *.o *~ core *.target elf.h
+
+readelf.c readsoname.c ldconfig.c ldd.c: headers
diff --git a/utils/bswap.h b/utils/bswap.h
new file mode 100644
index 000000000..1742d2507
--- /dev/null
+++ b/utils/bswap.h
@@ -0,0 +1,54 @@
+#ifndef _BSWAP_H
+#define _BSWAP_H 1
+
+#if !defined(__BYTE_ORDER) && defined(BYTE_ORDER)
+# define __BYTE_ORDER = BYTE_ORDER
+#endif
+
+#ifndef __BYTE_ORDER
+#ifdef __linux__
+#include <endian.h>
+#else
+#define __LITTLE_ENDIAN 1234 /* least-significant byte first (vax, pc) */
+#define __BIG_ENDIAN 4321 /* most-significant byte first (IBM, net) */
+#define __PDP_ENDIAN 3412 /* LSB first in word, MSW first in long (pdp) */
+
+#if defined(sun386) || defined(i386)
+#define __BYTE_ORDER __LITTLE_ENDIAN
+#endif
+
+#if defined(sparc)
+#define __BYTE_ORDER __BIG_ENDIAN
+#endif
+
+#endif /* __linux__ */
+#endif /* __BYTE_ORDER */
+
+
+#ifndef __BYTE_ORDER
+# error "Undefined __BYTE_ORDER"
+#endif
+
+#ifdef __linux__
+#include <byteswap.h>
+#else
+#include <string.h>
+static __inline__ uint32_t bswap_32(uint32_t x)
+ {
+ uint32_t res;
+
+ swab((void*)&x, (void*)&res, sizeof(uint32_t));
+
+ return res;
+ }
+
+static __inline__ uint16_t bswap_16(uint16_t x)
+ {
+ uint16_t res;
+
+ swab((void*)&x, (void*)&res, sizeof(uint16_t));
+ return res;
+ }
+#endif
+
+#endif
diff --git a/utils/ldconfig.c b/utils/ldconfig.c
new file mode 100644
index 000000000..806604edd
--- /dev/null
+++ b/utils/ldconfig.c
@@ -0,0 +1,900 @@
+/*
+ * ldconfig - update shared library symlinks
+ *
+ * usage: ldconfig [-DvqnNX] [-f conf] [-C cache] [-r root] dir ...
+ * ldconfig -l [-Dv] lib ...
+ * ldconfig -p
+ * -D: debug mode, don't update links
+ * -v: verbose mode, print things as we go
+ * -q: quiet mode, don't print warnings
+ * -n: don't process standard directories
+ * -N: don't update the library cache
+ * -X: don't update the library links
+ * -l: library mode, manually link libraries
+ * -p: print the current library cache
+ * -f conf: use conf instead of /etc/ld.so.conf
+ * -C cache: use cache instead of /etc/ld.so.cache
+ * -r root: first, do a chroot to the indicated directory
+ * dir ...: directories to process
+ * lib ...: libraries to link
+ *
+ * Copyright 1994-2000 David Engel and Mitch D'Souza
+ *
+ * This program may be used for any purpose as long as this
+ * copyright notice is kept.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include <string.h>
+#include <ctype.h>
+#include <getopt.h>
+#include <dirent.h>
+#include <unistd.h>
+#include <link.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <sys/stat.h>
+#include <sys/mman.h>
+#include <ld_elf.h>
+#include "readsoname.h"
+
+struct exec
+{
+ unsigned long a_info; /* Use macros N_MAGIC, etc for access */
+ unsigned a_text; /* length of text, in bytes */
+ unsigned a_data; /* length of data, in bytes */
+ unsigned a_bss; /* length of uninitialized data area for file, in bytes */
+ unsigned a_syms; /* length of symbol table data in file, in bytes */
+ unsigned a_entry; /* start address */
+ unsigned a_trsize; /* length of relocation info for text, in bytes */
+ unsigned a_drsize; /* length of relocation info for data, in bytes */
+};
+
+#if !defined (N_MAGIC)
+#define N_MAGIC(exec) ((exec).a_info & 0xffff)
+#endif
+/* Code indicating object file or impure executable. */
+#define OMAGIC 0407
+/* Code indicating pure executable. */
+#define NMAGIC 0410
+/* Code indicating demand-paged executable. */
+#define ZMAGIC 0413
+/* This indicates a demand-paged executable with the header in the text.
+ The first page is unmapped to help trap NULL pointer references */
+#define QMAGIC 0314
+/* Code indicating core file. */
+#define CMAGIC 0421
+
+char *___strtok = NULL;
+
+/* For SunOS */
+#ifndef PATH_MAX
+#include <limits.h>
+#define PATH_MAX _POSIX_PATH_MAX
+#endif
+
+/* For SunOS */
+#ifndef N_MAGIC
+#define N_MAGIC(exec) ((exec).a_magic & 0xffff)
+#endif
+
+#define EXIT_OK 0
+#define EXIT_FATAL 128
+
+char *prog = NULL;
+int debug = 0; /* debug mode */
+int verbose = 0; /* verbose mode */
+int libmode = 0; /* library mode */
+int nocache = 0; /* don't build cache */
+int nolinks = 0; /* don't update links */
+
+char *conffile = LDSO_CONF; /* default conf file */
+char *cachefile = LDSO_CACHE; /* default cache file */
+void cache_print(void);
+void cache_dolib(const char *dir, const char *so, int libtype);
+void cache_write(void);
+
+/* These two are used internally -- you shouldn't need to use them */
+static void verror_msg(const char *s, va_list p)
+{
+ fflush(stdout);
+ fprintf(stderr, "%s: ", prog);
+ vfprintf(stderr, s, p);
+}
+
+extern void warnx(const char *s, ...)
+{
+ va_list p;
+
+ va_start(p, s);
+ verror_msg(s, p);
+ va_end(p);
+ fprintf(stderr, "\n");
+}
+
+extern void err(int errnum, const char *s, ...)
+{
+ va_list p;
+
+ va_start(p, s);
+ verror_msg(s, p);
+ va_end(p);
+ fprintf(stderr, "\n");
+ exit(errnum);
+}
+
+static void vperror_msg(const char *s, va_list p)
+{
+ int err = errno;
+
+ if (s == 0)
+ s = "";
+ verror_msg(s, p);
+ if (*s)
+ s = ": ";
+ fprintf(stderr, "%s%s\n", s, strerror(err));
+}
+
+extern void warn(const char *s, ...)
+{
+ va_list p;
+
+ va_start(p, s);
+ vperror_msg(s, p);
+ va_end(p);
+}
+
+void *xmalloc(size_t size)
+{
+ void *ptr;
+ if ((ptr = malloc(size)) == NULL)
+ err(EXIT_FATAL,"out of memory");
+ return ptr;
+}
+
+char *xstrdup(const char *str)
+{
+ char *ptr;
+ if ((ptr = strdup(str)) == NULL)
+ err(EXIT_FATAL,"out of memory");
+ return ptr;
+}
+
+/* If shared library, return a malloced copy of the soname and set the
+ type, else return NULL.
+
+ expected_type should be either LIB_ANY or one of the following:-
+ LIB_DLL
+ LIB_ELF
+ LIB_ELF_LIBC5
+ LIB_ELF_LIBC6
+
+ If the lib is ELF and we can not deduce the type the type will
+ be set based on expected_type.
+
+ If the expected, actual/deduced types missmatch we display a warning
+ and use the actual/deduced type.
+*/
+char *is_shlib(const char *dir, const char *name, int *type,
+ int *islink, int expected_type)
+{
+ char *good = NULL;
+ char *cp, *cp2;
+ FILE *file;
+ struct exec exec;
+ ElfW(Ehdr) *elf_hdr;
+ struct stat statbuf;
+ char buff[4096];
+
+ /* see if name is of the form libZ.so* */
+ if ((strncmp(name, "lib", 3) == 0 || strncmp(name, "ld-", 3) == 0) && \
+ name[strlen(name)-1] != '~' && (cp = strstr(name, ".so")))
+ {
+ /* find the start of the Vminor part, if any */
+ if (cp[3] == '.' && (cp2 = strchr(cp + 4, '.')))
+ cp = cp2;
+ else
+ cp = cp + strlen(cp);
+
+ /* construct the full path name */
+ sprintf(buff, "%s%s%s", dir, (*dir && strcmp(dir, "/")) ?
+ "/" : "", name);
+
+ /* first, make sure it's a regular file */
+ if (lstat(buff, &statbuf))
+ warn("skipping %s", buff);
+ else if (!S_ISREG(statbuf.st_mode) && !S_ISLNK(statbuf.st_mode))
+ warnx("%s is not a regular file or symlink, skipping", buff);
+ else
+ {
+ /* is it a regular file or a symlink */
+ *islink = S_ISLNK(statbuf.st_mode);
+
+ /* then try opening it */
+ if (!(file = fopen(buff, "rb")))
+ warn("skipping %s", buff);
+ else
+ {
+ /* now make sure it's a shared library */
+ if (fread(&exec, sizeof exec, 1, file) < 1)
+ warnx("can't read header from %s, skipping", buff);
+ else if (N_MAGIC(exec) != ZMAGIC && N_MAGIC(exec) != QMAGIC)
+ {
+ elf_hdr = (ElfW(Ehdr) *) &exec;
+ if (elf_hdr->e_ident[0] != 0x7f ||
+ strncmp(&elf_hdr->e_ident[1], "ELF",3) != 0)
+ {
+ /* silently ignore linker scripts */
+ if (strncmp((char *)&exec, "/* GNU ld", 9) != 0)
+ warnx("%s is not a shared library, skipping", buff);
+ }
+ else
+ {
+ /* always call readsoname to update type */
+ if(expected_type == LIB_DLL) {
+ warnx("%s is not an a.out library, its ELF!\n", buff);
+ expected_type=LIB_ANY;
+ }
+ *type = LIB_ELF;
+ good = readsoname(buff, file, expected_type, type,
+ elf_hdr->e_ident[EI_CLASS]);
+ if (good == NULL || *islink)
+ {
+ if (good != NULL)
+ free(good);
+ good = xstrdup(name);
+ }
+ else
+ {
+ /* if the soname does not match the filename,
+ issue a warning, but only in debug mode. */
+ int len = strlen(good);
+ if (debug && (strncmp(good, name, len) != 0 ||
+ (name[len] != '\0' && name[len] != '.')))
+ warnx("%s has inconsistent soname (%s)", buff, good);
+ }
+ }
+ }
+ else
+ {
+ if (*islink)
+ good = xstrdup(name);
+ else
+ {
+ good = xmalloc(cp - name + 1);
+ strncpy(good, name, cp - name);
+ good[cp - name] = '\0';
+ }
+ if(expected_type != LIB_ANY && expected_type != LIB_DLL)
+ {
+ warnx("%s is not an ELF library, its an a.out DLL!", buff);
+ expected_type=LIB_ANY;
+ }
+
+ *type = LIB_DLL;
+ }
+ fclose(file);
+ }
+ }
+ }
+
+ return good;
+}
+
+/* update the symlink to new library */
+void link_shlib(const char *dir, const char *file, const char *so)
+{
+ int change = 1;
+ char libname[4096];
+ char linkname[4096];
+ struct stat libstat;
+ struct stat linkstat;
+
+ /* construct the full path names */
+ sprintf(libname, "%s/%s", dir, file);
+ sprintf(linkname, "%s/%s", dir, so);
+
+ /* see if a link already exists */
+ if (!stat(linkname, &linkstat))
+ {
+ /* now see if it's the one we want */
+ if (stat(libname, &libstat))
+ warn("can't stat %s", libname);
+ else if (libstat.st_dev == linkstat.st_dev &&
+ libstat.st_ino == linkstat.st_ino)
+ change = 0;
+ }
+
+ /* then update the link, if required */
+ if (change > 0 && !nolinks)
+ {
+ if (!lstat(linkname, &linkstat))
+ {
+ if (!S_ISLNK(linkstat.st_mode))
+ {
+ warnx("%s is not a symlink", linkname);
+ change = -1;
+ }
+ else if (remove(linkname))
+ {
+ warn("can't unlink %s", linkname);
+ change = -1;
+ }
+ }
+ if (change > 0)
+ {
+ if (symlink(file, linkname))
+ {
+ warn("can't link %s to %s", linkname, file);
+ change = -1;
+ }
+ }
+ }
+
+ /* some people like to know what we're doing */
+ if (verbose > 0)
+ printf("\t%s => %s%s\n", so, file,
+ change < 0 ? " (SKIPPED)" :
+ (change > 0 ? " (changed)" : ""));
+
+ return;
+}
+
+/* figure out which library is greater */
+int libcmp(char *p1, char *p2)
+{
+ while (*p1)
+ {
+ if (isdigit(*p1) && isdigit(*p2))
+ {
+ /* must compare this numerically */
+ int v1, v2;
+ v1 = strtoul(p1, &p1, 10);
+ v2 = strtoul(p2, &p2, 10);
+ if (v1 != v2)
+ return v1 - v2;
+ }
+ else if (isdigit(*p1) && !isdigit(*p2))
+ return 1;
+ else if (!isdigit(*p1) && isdigit(*p2))
+ return -1;
+ else if (*p1 != *p2)
+ return *p1 - *p2;
+ else
+ p1++, p2++;
+ }
+
+ return *p1 - *p2;
+}
+
+struct lib
+{
+ char *so; /* soname of a library */
+ char *name; /* name of a library */
+ int libtype; /* type of a library */
+ int islink; /* is it a symlink */
+ struct lib *next; /* next library in list */
+};
+
+/* update all shared library links in a directory */
+void scan_dir(const char *rawname)
+{
+ DIR *dir;
+ const char *name;
+ struct dirent *ent;
+ char *so, *path, *path_n;
+ struct lib *lp, *libs = NULL;
+ int i, libtype, islink, expected_type = LIB_ANY;
+
+ /* We need a writable copy of this string */
+ path = strdup(rawname);
+ if (!path) {
+ err(EXIT_FATAL, "Out of memory!\n");
+ }
+ /* Eliminate all double //s */
+ path_n=path;
+ while((path_n=strstr(path_n, "//"))) {
+ i = strlen(path_n);
+ memmove(path_n, path_n+1, i-1);
+ *(path_n + i - 1)='\0';
+ }
+ name = path;
+
+#if 0
+ char *t;
+ /* Check for an embedded expected type */
+ t=strrchr(name, '=');
+ if( t )
+ {
+ *t++ = '\0'; /* Skip = char */
+ if(strcasecmp(t, "libc4") == 0)
+ {
+ expected_type = LIB_DLL;
+ }
+ else
+ {
+ if(strcasecmp(t, "libc5") == 0)
+ {
+ expected_type = LIB_ELF_LIBC5;
+ }
+ else
+ {
+ if(strcasecmp(t, "libc6") == 0)
+ {
+ expected_type = LIB_ELF_LIBC6;
+ }
+ else
+ {
+ if(strcasecmp(t, "libc0") == 0)
+ {
+ expected_type = LIB_ELF_LIBC0;
+ }
+ else
+ {
+ warnx("Unknown type field '%s' for dir '%s' - ignored\n", t, name);
+ expected_type = LIB_ANY;
+ }
+ }
+ }
+ }
+ }
+#endif
+
+ /* let 'em know what's going on */
+ if (verbose > 0)
+ printf("%s:\n", name);
+
+ /* if we can't open it, we can't do anything */
+ if ((dir = opendir(name)) == NULL)
+ {
+ warn("skipping %s", name);
+ free(path);
+ return;
+ }
+
+ /* yes, we have to look at every single file */
+ while ((ent = readdir(dir)) != NULL)
+ {
+ /* if it's not a shared library, don't bother */
+ if ((so = is_shlib(name, ent->d_name, &libtype, &islink, expected_type)) == NULL)
+ continue;
+
+ /* have we already seen one with the same so name? */
+ for (lp = libs; lp; lp = lp->next)
+ {
+ if (strcmp(so, lp->so) == 0)
+ {
+ /* we have, which one do we want to use? */
+ if ((!islink && lp->islink) ||
+ (islink == lp->islink &&
+ libcmp(ent->d_name, lp->name) > 0))
+ {
+ /* let's use the new one */
+ free(lp->name);
+ lp->name = xstrdup(ent->d_name);
+ lp->libtype = libtype;
+ lp->islink = islink;
+ }
+ break;
+ }
+ }
+
+ /* congratulations, you're the first one we've seen */
+ if (!lp)
+ {
+ lp = xmalloc(sizeof *lp);
+ lp->so = xstrdup(so);
+ lp->name = xstrdup(ent->d_name);
+ lp->libtype = libtype;
+ lp->islink = islink;
+ lp->next = libs;
+ libs = lp;
+ }
+
+ free(so);
+ }
+
+ /* don't need this any more */
+ closedir(dir);
+
+ /* now we have all the latest libs, update the links */
+ for (lp = libs; lp; lp = lp->next)
+ {
+ if (!lp->islink)
+ link_shlib(name, lp->name, lp->so);
+#ifdef USE_CACHE
+ if (!nocache)
+ cache_dolib(name, lp->so, lp->libtype);
+#endif
+ }
+
+ /* always try to clean up after ourselves */
+ while (libs)
+ {
+ lp = libs->next;
+ free(libs->so);
+ free(libs->name);
+ free(libs);
+ libs = lp;
+ }
+
+ free(path);
+ return;
+}
+
+/* return the list of system-specific directories */
+char *get_extpath(void)
+{
+ char *res = NULL, *cp;
+ FILE *file;
+ struct stat stat;
+
+ if ((file = fopen(conffile, "r")) != NULL)
+ {
+ fstat(fileno(file), &stat);
+ res = xmalloc(stat.st_size + 1);
+ fread(res, 1, stat.st_size, file);
+ fclose(file);
+ res[stat.st_size] = '\0';
+
+ /* convert comments fo spaces */
+ for (cp = res; *cp; /*nada*/) {
+ if (*cp == '#') {
+ do
+ *cp++ = ' ';
+ while (*cp && *cp != '\n');
+ } else {
+ cp++;
+ }
+ }
+ }
+
+ return res;
+}
+
+#ifdef USE_CACHE
+typedef struct liblist
+{
+ int flags;
+ int sooffset;
+ int liboffset;
+ char *soname;
+ char *libname;
+ struct liblist *next;
+} liblist_t;
+
+static header_t magic = { LDSO_CACHE_MAGIC, LDSO_CACHE_VER, 0 };
+static liblist_t *lib_head = NULL;
+
+static int liblistcomp(liblist_t *x, liblist_t *y)
+{
+ int res;
+
+ if ((res = libcmp(x->soname, y->soname)) == 0)
+ {
+ res = libcmp(strrchr(x->libname, '/') + 1,
+ strrchr(y->libname, '/') + 1);
+ }
+
+ return res;
+}
+
+void cache_dolib(const char *dir, const char *so, int libtype)
+{
+ char fullpath[PATH_MAX];
+ liblist_t *new_lib, *cur_lib;
+
+ magic.nlibs++;
+ sprintf(fullpath, "%s/%s", dir, so);
+ new_lib = xmalloc(sizeof (liblist_t));
+ new_lib->flags = libtype;
+ new_lib->soname = xstrdup(so);
+ new_lib->libname = xstrdup(fullpath);
+
+ if (lib_head == NULL || liblistcomp(new_lib, lib_head) > 0)
+ {
+ new_lib->next = lib_head;
+ lib_head = new_lib;
+ }
+ else
+ {
+ for (cur_lib = lib_head; cur_lib->next != NULL &&
+ liblistcomp(new_lib, cur_lib->next) <= 0;
+ cur_lib = cur_lib->next)
+ /* nothing */;
+ new_lib->next = cur_lib->next;
+ cur_lib->next = new_lib;
+ }
+}
+
+void cache_write(void)
+{
+ int cachefd;
+ int stroffset = 0;
+ char tempfile[4096];
+ liblist_t *cur_lib;
+
+ if (!magic.nlibs)
+ return;
+
+ sprintf(tempfile, "%s~", cachefile);
+
+ if (unlink(tempfile) && errno != ENOENT)
+ err(EXIT_FATAL,"can't unlink %s (%s)", tempfile, strerror(errno));
+
+ if ((cachefd = creat(tempfile, 0644)) < 0)
+ err(EXIT_FATAL,"can't create %s (%s)", tempfile, strerror(errno));
+
+ if (write(cachefd, &magic, sizeof (header_t)) != sizeof (header_t))
+ err(EXIT_FATAL,"can't write %s (%s)", tempfile, strerror(errno));
+
+ for (cur_lib = lib_head; cur_lib != NULL; cur_lib = cur_lib->next)
+ {
+ cur_lib->sooffset = stroffset;
+ stroffset += strlen(cur_lib->soname) + 1;
+ cur_lib->liboffset = stroffset;
+ stroffset += strlen(cur_lib->libname) + 1;
+ if (write(cachefd, cur_lib, sizeof (libentry_t)) !=
+ sizeof (libentry_t))
+ err(EXIT_FATAL,"can't write %s (%s)", tempfile, strerror(errno));
+ }
+
+ for (cur_lib = lib_head; cur_lib != NULL; cur_lib = cur_lib->next)
+ {
+ if (write(cachefd, cur_lib->soname, strlen(cur_lib->soname) + 1)
+ != strlen(cur_lib->soname) + 1)
+ err(EXIT_FATAL,"can't write %s (%s)", tempfile, strerror(errno));
+ if (write(cachefd, cur_lib->libname, strlen(cur_lib->libname) + 1)
+ != strlen(cur_lib->libname) + 1)
+ err(EXIT_FATAL,"can't write %s (%s)", tempfile, strerror(errno));
+ }
+
+ if (close(cachefd))
+ err(EXIT_FATAL,"can't close %s (%s)", tempfile, strerror(errno));
+
+ if (chmod(tempfile, 0644))
+ err(EXIT_FATAL,"can't chmod %s (%s)", tempfile, strerror(errno));
+
+ if (rename(tempfile, cachefile))
+ err(EXIT_FATAL,"can't rename %s (%s)", tempfile, strerror(errno));
+}
+
+void cache_print(void)
+{
+ caddr_t c;
+ struct stat st;
+ int fd = 0;
+ char *strs;
+ header_t *header;
+ libentry_t *libent;
+
+ if (stat(cachefile, &st) || (fd = open(cachefile, O_RDONLY))<0)
+ err(EXIT_FATAL,"can't read %s (%s)", cachefile, strerror(errno));
+ if ((c = mmap(0,st.st_size, PROT_READ, MAP_SHARED ,fd, 0)) == (caddr_t)-1)
+ err(EXIT_FATAL,"can't map %s (%s)", cachefile, strerror(errno));
+ close(fd);
+
+ if (memcmp(((header_t *)c)->magic, LDSO_CACHE_MAGIC, LDSO_CACHE_MAGIC_LEN))
+ err(EXIT_FATAL,"%s cache corrupt", cachefile);
+
+ if (memcmp(((header_t *)c)->version, LDSO_CACHE_VER, LDSO_CACHE_VER_LEN))
+ err(EXIT_FATAL,"wrong cache version - expected %s", LDSO_CACHE_VER);
+
+ header = (header_t *)c;
+ libent = (libentry_t *)(c + sizeof (header_t));
+ strs = (char *)&libent[header->nlibs];
+
+ printf("%d libs found in cache `%s' (version %s)\n",
+ header->nlibs, cachefile, LDSO_CACHE_VER);
+
+ for (fd = 0; fd < header->nlibs; fd++)
+ {
+ printf("\t%s ", strs + libent[fd].sooffset);
+ switch (libent[fd].flags & ~LIB_ELF64)
+ {
+ case LIB_DLL:
+ printf("(libc4)");
+ break;
+ case LIB_ELF:
+ printf("(ELF%s)", libent[fd].flags & LIB_ELF64 ? "/64" : "");
+ break;
+ case LIB_ELF_LIBC5:
+ case LIB_ELF_LIBC6:
+ printf("(libc%d%s)", (libent[fd].flags & ~LIB_ELF64) + 3,
+ libent[fd].flags & LIB_ELF64 ? "/64" : "");
+ break;
+ default:
+ printf("(unknown)");
+ break;
+ }
+ printf(" => %s\n", strs + libent[fd].liboffset);
+ }
+
+ munmap (c,st.st_size);
+}
+#else
+void cache_print(void)
+{
+ warnx("Cache support disabled\n");
+}
+#endif
+
+void usage(void)
+{
+ fprintf(stderr,
+ "ldconfig - updates symlinks for shared libraries\n\n"
+ "Usage: ldconfig [-DvqnNX] [-f conf] [-C cache] [-r root] dir ...\n"
+ " ldconfig -l [-Dv] lib ...\n"
+ " ldconfig -p\n\nOptions:\n"
+ "\t-D:\t\tdebug mode, don't update links\n"
+ "\t-v:\t\tverbose mode, print things as we go\n"
+ "\t-q:\t\tquiet mode, don't print warnings\n"
+ "\t-n:\t\tdon't process standard directories\n"
+ "\t-N:\t\tdon't update the library cache\n"
+ "\t-X:\t\tdon't update the library links\n"
+ "\t-l:\t\tlibrary mode, manually link libraries\n"
+ "\t-p:\t\tprint the current library cache\n"
+ "\t-f conf :\tuse conf instead of %s\n"
+ "\t-C cache:\tuse cache instead of %s\n"
+ "\t-r root :\tfirst, do a chroot to the indicated directory\n"
+ "\tdir ... :\tdirectories to process\n"
+ "\tlib ... :\tlibraries to link\n\n",
+ LDSO_CONF, LDSO_CACHE
+ );
+ exit(EXIT_FATAL);
+}
+
+#define DIR_SEP ":, \t\n"
+int main(int argc, char **argv)
+{
+ int i, c;
+ int nodefault = 0;
+ int printcache = 0;
+ char *cp, *dir, *so;
+ char *extpath;
+ int libtype, islink;
+ char *chroot_dir = NULL;
+
+ prog = argv[0];
+ opterr = 0;
+
+ while ((c = getopt(argc, argv, "DvqnNXlpf:C:r:")) != EOF)
+ switch (c)
+ {
+ case 'D':
+ debug = 1; /* debug mode */
+ nocache = 1;
+ nolinks = 1;
+ verbose = 1;
+ break;
+ case 'v':
+ verbose = 1; /* verbose mode */
+ break;
+ case 'q':
+ if (verbose <= 0)
+ verbose = -1; /* quiet mode */
+ break;
+ case 'n':
+ nodefault = 1; /* no default dirs */
+ nocache = 1;
+ break;
+ case 'N':
+ nocache = 1; /* don't build cache */
+ break;
+ case 'X':
+ nolinks = 1; /* don't update links */
+ break;
+ case 'l':
+ libmode = 1; /* library mode */
+ break;
+ case 'p':
+ printcache = 1; /* print cache */
+ break;
+ case 'f':
+ conffile = optarg; /* alternate conf file */
+ break;
+ case 'C':
+ cachefile = optarg; /* alternate cache file */
+ break;
+ case 'r':
+ chroot_dir = optarg;
+ break;
+ default:
+ usage();
+ break;
+
+ /* THE REST OF THESE ARE UNDOCUMENTED AND MAY BE REMOVED
+ IN FUTURE VERSIONS. */
+ }
+
+ if (chroot_dir && *chroot_dir) {
+ if (chroot(chroot_dir) < 0)
+ err(EXIT_FATAL,"couldn't chroot to %s (%s)", chroot_dir, strerror(errno));
+ if (chdir("/") < 0)
+ err(EXIT_FATAL,"couldn't chdir to / (%s)", strerror(errno));
+ }
+
+ /* allow me to introduce myself, hi, my name is ... */
+ if (verbose > 0)
+ printf("%s: uClibc version\n", argv[0]);
+
+ if (printcache)
+ {
+ /* print the cache -- don't you trust me? */
+ cache_print();
+ exit(EXIT_OK);
+ }
+ else if (libmode)
+ {
+ /* so you want to do things manually, eh? */
+
+ /* ok, if you're so smart, which libraries do we link? */
+ for (i = optind; i < argc; i++)
+ {
+ /* split into directory and file parts */
+ if (!(cp = strrchr(argv[i], '/')))
+ {
+ dir = "."; /* no dir, only a filename */
+ cp = argv[i];
+ }
+ else
+ {
+ if (cp == argv[i])
+ dir = "/"; /* file in root directory */
+ else
+ dir = argv[i];
+ *cp++ = '\0'; /* neither of the above */
+ }
+
+ /* we'd better do a little bit of checking */
+ if ((so = is_shlib(dir, cp, &libtype, &islink, LIB_ANY)) == NULL)
+ err(EXIT_FATAL,"%s%s%s is not a shared library", dir,
+ (*dir && strcmp(dir, "/")) ? "/" : "", cp);
+
+ /* so far, so good, maybe he knows what he's doing */
+ link_shlib(dir, cp, so);
+ }
+ }
+ else
+ {
+ /* the lazy bum want's us to do all the work for him */
+
+ /* don't cache dirs on the command line */
+ int nocache_save = nocache;
+ nocache = 1;
+
+ /* OK, which directories should we do? */
+ for (i = optind; i < argc; i++)
+ scan_dir(argv[i]);
+
+ /* restore the desired caching state */
+ nocache = nocache_save;
+
+ /* look ma, no defaults */
+ if (!nodefault)
+ {
+ /* I guess the defaults aren't good enough */
+ if ((extpath = get_extpath()))
+ {
+ for (cp = strtok(extpath, DIR_SEP); cp;
+ cp = strtok(NULL, DIR_SEP))
+ scan_dir(cp);
+ free(extpath);
+ }
+
+ scan_dir(UCLIBC_RUNTIME_PREFIX "/usr/X11R6/lib");
+ scan_dir(UCLIBC_RUNTIME_PREFIX "/usr/lib");
+ scan_dir(UCLIBC_RUNTIME_PREFIX "/lib");
+ }
+
+#ifdef USE_CACHE
+ if (!nocache)
+ cache_write();
+#endif
+ }
+
+ exit(EXIT_OK);
+}
+
diff --git a/utils/ldd.c b/utils/ldd.c
new file mode 100644
index 000000000..3ea41b424
--- /dev/null
+++ b/utils/ldd.c
@@ -0,0 +1,664 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * A small little ldd implementation for uClibc
+ *
+ * Copyright (C) 2000 by Lineo, inc and Erik Andersen
+ * Copyright (C) 2000-2002 Erik Andersen <andersee@debian.org>
+ *
+ * Several functions in this file (specifically, elf_find_section_type(),
+ * elf_find_phdr_type(), and elf_find_dynamic(), were stolen from elflib.c from
+ * elfvector (http://www.BitWagon.com/elfvector.html) by John F. Reiser
+ * <jreiser@BitWagon.com>, which is copyright 2000 BitWagon Software LLC
+ * (GPL2).
+ *
+ * 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 of the License, 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+
+#define _GNU_SOURCE
+#include <stdlib.h>
+#include <stdio.h>
+#include <fcntl.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/mman.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+
+#include "bswap.h"
+#if defined (sun)
+#include "link.h"
+#else
+#include "elf.h"
+#endif
+
+#ifdef DMALLOC
+#include <dmalloc.h>
+#endif
+
+#if defined(__arm__)
+#define MATCH_MACHINE(x) (x == EM_ARM)
+#define ELFCLASSM ELFCLASS32
+#endif
+
+#if defined(__s390__)
+#define MATCH_MACHINE(x) (x == EM_S390)
+#define ELFCLASSM ELFCLASS32
+#endif
+
+#if defined(__i386__)
+#ifndef EM_486
+#define MATCH_MACHINE(x) (x == EM_386)
+#else
+#define MATCH_MACHINE(x) (x == EM_386 || x == EM_486)
+#endif
+#define ELFCLASSM ELFCLASS32
+#endif
+
+#if defined(__mc68000__)
+#define MATCH_MACHINE(x) (x == EM_68K)
+#define ELFCLASSM ELFCLASS32
+#endif
+
+#if defined(__mips__)
+#define MATCH_MACHINE(x) (x == EM_MIPS || x == EM_MIPS_RS3_LE)
+#define ELFCLASSM ELFCLASS32
+#endif
+
+#if defined(__powerpc__)
+#define MATCH_MACHINE(x) (x == EM_PPC)
+#define ELFCLASSM ELFCLASS32
+#endif
+
+#if defined(__sh__)
+#define MATCH_MACHINE(x) (x == EM_SH)
+#define ELFCLASSM ELFCLASS32
+#endif
+
+#if defined (__v850e__)
+#define MATCH_MACHINE(x) ((x) == EM_V850 || (x) == EM_CYGNUS_V850)
+#define ELFCLASSM ELFCLASS32
+#endif
+
+#if defined (__sparc__)
+#define MATCH_MACHINE(x) ((x) == EM_SPARC || (x) == EM_SPARC32PLUS)
+#define ELFCLASSM ELFCLASS32
+#endif
+
+
+#ifndef MATCH_MACHINE
+#warning "You really should add a MATCH_MACHINE() macro for your architecture"
+#endif
+
+#if __BYTE_ORDER == __LITTLE_ENDIAN
+#define ELFDATAM ELFDATA2LSB
+#elif __BYTE_ORDER == __BIG_ENDIAN
+#define ELFDATAM ELFDATA2MSB
+#endif
+
+struct library {
+ char *name;
+ int resolved;
+ char *path;
+ struct library *next;
+};
+struct library *lib_list = NULL;
+char not_found[] = "not found";
+char *interp = NULL;
+char *interp_dir = NULL;
+int byteswap;
+static int interpreter_already_found=0;
+
+inline uint32_t byteswap32_to_host(uint32_t value)
+{
+ if (byteswap==1) {
+ return(bswap_32(value));
+ } else {
+ return(value);
+ }
+}
+
+
+
+Elf32_Shdr * elf_find_section_type( int key, Elf32_Ehdr *ehdr)
+{
+ int j;
+ Elf32_Shdr *shdr;
+ shdr = (Elf32_Shdr *)(ehdr->e_shoff + (char *)ehdr);
+ for (j = ehdr->e_shnum; --j>=0; ++shdr) {
+ if (key==(int)byteswap32_to_host(shdr->sh_type)) {
+ return shdr;
+ }
+ }
+ return NULL;
+}
+
+Elf32_Phdr * elf_find_phdr_type( int type, Elf32_Ehdr *ehdr)
+{
+ int j;
+ Elf32_Phdr *phdr = (Elf32_Phdr *)(ehdr->e_phoff + (char *)ehdr);
+ for (j = ehdr->e_phnum; --j>=0; ++phdr) {
+ if (type==(int)byteswap32_to_host(phdr->p_type)) {
+ return phdr;
+ }
+ }
+ return NULL;
+}
+
+/* Returns value if return_val==1, ptr otherwise */
+void * elf_find_dynamic(int const key, Elf32_Dyn *dynp,
+ Elf32_Ehdr *ehdr, int return_val)
+{
+ Elf32_Phdr *pt_text = elf_find_phdr_type(PT_LOAD, ehdr);
+ unsigned tx_reloc = byteswap32_to_host(pt_text->p_vaddr) - byteswap32_to_host(pt_text->p_offset);
+ for (; DT_NULL!=byteswap32_to_host(dynp->d_tag); ++dynp) {
+ if (key == (int)byteswap32_to_host(dynp->d_tag)) {
+ if (return_val == 1)
+ return (void *)(intptr_t)byteswap32_to_host(dynp->d_un.d_val);
+ else
+ return (void *)(byteswap32_to_host(dynp->d_un.d_val) - tx_reloc + (char *)ehdr );
+ }
+ }
+ return NULL;
+}
+
+int check_elf_header(Elf32_Ehdr *const ehdr)
+{
+ if (! ehdr || strncmp((void *)ehdr, ELFMAG, SELFMAG) != 0 ||
+ ehdr->e_ident[EI_CLASS] != ELFCLASS32 ||
+ ehdr->e_ident[EI_VERSION] != EV_CURRENT)
+ {
+ return 1;
+ }
+
+ /* Check if the target endianness matches the host's endianness */
+ byteswap = 0;
+#if __BYTE_ORDER == __LITTLE_ENDIAN
+ if (ehdr->e_ident[5] == ELFDATA2MSB) {
+ /* Ick -- we will have to byte-swap everything */
+ byteswap = 1;
+ }
+#elif __BYTE_ORDER == __BIG_ENDIAN
+ if (ehdr->e_ident[5] == ELFDATA2LSB) {
+ /* Ick -- we will have to byte-swap everything */
+ byteswap = 1;
+ }
+#else
+#error Unknown host byte order!
+#endif
+
+ /* Be vary lazy, and only byteswap the stuff we use */
+ if (byteswap==1) {
+ ehdr->e_type=bswap_16(ehdr->e_type);
+ ehdr->e_phoff=bswap_32(ehdr->e_phoff);
+ ehdr->e_shoff=bswap_32(ehdr->e_shoff);
+ ehdr->e_phnum=bswap_16(ehdr->e_phnum);
+ ehdr->e_shnum=bswap_16(ehdr->e_shnum);
+ }
+
+ return 0;
+}
+
+/* This function's behavior must exactly match that
+ * in uClibc/ldso/ldso/readelflib1.c */
+static void search_for_named_library(char *name, char *result, const char *path_list)
+{
+ int i, count = 1;
+ char *path, *path_n;
+ struct stat filestat;
+
+ /* We need a writable copy of this string */
+ path = strdup(path_list);
+ if (!path) {
+ fprintf(stderr, "Out of memory!\n");
+ exit(EXIT_FAILURE);
+ }
+ /* Eliminate all double //s */
+ path_n=path;
+ while((path_n=strstr(path_n, "//"))) {
+ i = strlen(path_n);
+ memmove(path_n, path_n+1, i-1);
+ *(path_n + i - 1)='\0';
+ }
+
+ /* Replace colons with zeros in path_list and count them */
+ for(i=strlen(path); i > 0; i--) {
+ if (path[i]==':') {
+ path[i]=0;
+ count++;
+ }
+ }
+ path_n = path;
+ for (i = 0; i < count; i++) {
+ strcpy(result, path_n);
+ strcat(result, "/");
+ strcat(result, name);
+ if (stat (result, &filestat) == 0 && filestat.st_mode & S_IRUSR) {
+ free(path);
+ return;
+ }
+ path_n += (strlen(path_n) + 1);
+ }
+ free(path);
+ *result = '\0';
+}
+
+void locate_library_file(Elf32_Ehdr* ehdr, Elf32_Dyn* dynamic, int is_suid, struct library *lib)
+{
+ char *buf;
+ char *path;
+ struct stat filestat;
+
+ /* If this is a fully resolved name, our job is easy */
+ if (stat (lib->name, &filestat) == 0) {
+ lib->path = lib->name;
+ return;
+ }
+
+ /* We need some elbow room here. Make some room...*/
+ buf = malloc(1024);
+ if (!buf) {
+ fprintf(stderr, "Out of memory!\n");
+ exit(EXIT_FAILURE);
+ }
+
+ /* This function must match the behavior of _dl_load_shared_library
+ * in readelflib1.c or things won't work out as expected... */
+
+ /* The ABI specifies that RPATH is searched first, so do that now. */
+ path = (char *)elf_find_dynamic(DT_RPATH, dynamic, ehdr, 0);
+ if (path) {
+ search_for_named_library(lib->name, buf, path);
+ if (*buf != '\0') {
+ lib->path = buf;
+ return;
+ }
+ }
+
+ /* Next check LD_{ELF_}LIBRARY_PATH if specified and allowed.
+ * Since this app doesn't actually run an executable I will skip
+ * the suid check, and just use LD_{ELF_}LIBRARY_PATH if set */
+ if (is_suid==1)
+ path = NULL;
+ else
+ path = getenv("LD_LIBRARY_PATH");
+ if (path) {
+ search_for_named_library(lib->name, buf, path);
+ if (*buf != '\0') {
+ lib->path = buf;
+ return;
+ }
+ }
+
+#ifdef USE_CACHE
+ /* FIXME -- add code to check the Cache here */
+#endif
+
+
+ /* Next look for libraries wherever the shared library
+ * loader was installed -- this is usually where we
+ * should find things... */
+ if (interp_dir) {
+ search_for_named_library(lib->name, buf, interp_dir);
+ if (*buf != '\0') {
+ lib->path = buf;
+ return;
+ }
+ }
+
+ /* Lastly, search the standard list of paths for the library.
+ This list must exactly match the list in uClibc/ldso/ldso/readelflib1.c */
+ path = UCLIBC_RUNTIME_PREFIX "usr/X11R6/lib:"
+ UCLIBC_RUNTIME_PREFIX "usr/lib:"
+ UCLIBC_RUNTIME_PREFIX "lib:"
+ "/usr/lib:"
+ "/lib";
+ search_for_named_library(lib->name, buf, path);
+ if (*buf != '\0') {
+ lib->path = buf;
+ } else {
+ free(buf);
+ lib->path = not_found;
+ }
+}
+
+static int add_library(Elf32_Ehdr* ehdr, Elf32_Dyn* dynamic, int is_setuid, char *s)
+{
+ char *tmp, *tmp1, *tmp2;
+ struct library *cur, *newlib=lib_list;
+
+ if (!s || !strlen(s))
+ return 1;
+
+ tmp = s;
+ while (*tmp) {
+ if (*tmp == '/')
+ s = tmp + 1;
+ tmp++;
+ }
+
+ /* We add libc.so.0 elsewhere */
+ if (interpreter_already_found && (tmp=strrchr(interp, '/')) != NULL)
+ {
+ int len = strlen(interp_dir);
+ if (strcmp(s, interp+1+len)==0)
+ return 1;
+ }
+
+ for (cur = lib_list; cur; cur=cur->next) {
+ /* Check if this library is already in the list */
+ tmp1 = tmp2 = cur->name;
+ while (*tmp1) {
+ if (*tmp1 == '/')
+ tmp2 = tmp1 + 1;
+ tmp1++;
+ }
+ if(strcmp(tmp2, s)==0) {
+ //printf("find_elf_interpreter is skipping '%s' (already in list)\n", cur->name);
+ return 0;
+ }
+ }
+
+ /* Ok, this lib needs to be added to the list */
+ newlib = malloc(sizeof(struct library));
+ if (!newlib)
+ return 1;
+ newlib->name = malloc(strlen(s)+1);
+ strcpy(newlib->name, s);
+ newlib->resolved = 0;
+ newlib->path = NULL;
+ newlib->next = NULL;
+
+ /* Now try and locate where this library might be living... */
+ locate_library_file(ehdr, dynamic, is_setuid, newlib);
+
+ //printf("add_library is adding '%s' to '%s'\n", newlib->name, newlib->path);
+ if (!lib_list) {
+ lib_list = newlib;
+ } else {
+ for (cur = lib_list; cur->next; cur=cur->next); /* nothing */
+ cur->next = newlib;
+ }
+ return 0;
+}
+
+
+static void find_needed_libraries(Elf32_Ehdr* ehdr, Elf32_Dyn* dynamic, char *strtab, int is_setuid)
+{
+ Elf32_Dyn *dyns;
+
+ for (dyns=dynamic; byteswap32_to_host(dyns->d_tag)!=DT_NULL; ++dyns) {
+ if (DT_NEEDED == byteswap32_to_host(dyns->d_tag)) {
+ add_library(ehdr, dynamic, is_setuid,
+ (char*)strtab + byteswap32_to_host(dyns->d_un.d_val));
+ }
+ }
+}
+
+static struct library * find_elf_interpreter(Elf32_Ehdr* ehdr)
+{
+ Elf32_Phdr *phdr;
+
+ if (interpreter_already_found==1)
+ return NULL;
+ phdr = elf_find_phdr_type(PT_INTERP, ehdr);
+ if (phdr) {
+ struct library *cur, *newlib=NULL;
+ char *s = (char*)ehdr + byteswap32_to_host(phdr->p_offset);
+
+ char *tmp, *tmp1;
+ interp = strdup(s);
+ interp_dir = strdup(s);
+ tmp = strrchr(interp_dir, '/');
+ if (*tmp)
+ *tmp = '\0';
+ else {
+ free(interp_dir);
+ interp_dir = interp;
+ }
+ tmp1 = tmp = s;
+ while (*tmp) {
+ if (*tmp == '/')
+ tmp1 = tmp + 1;
+ tmp++;
+ }
+ for (cur = lib_list; cur; cur=cur->next) {
+ /* Check if this library is already in the list */
+ if(strcmp(cur->name, tmp1)==0) {
+ //printf("find_elf_interpreter is replacing '%s' (already in list)\n", cur->name);
+ newlib = cur;
+ free(newlib->name);
+ free(newlib->path);
+ return NULL;
+ }
+ }
+ if (newlib == NULL)
+ newlib = malloc(sizeof(struct library));
+ if (!newlib)
+ return NULL;
+ newlib->name = malloc(strlen(s)+1);
+ strcpy(newlib->name, s);
+ newlib->path = newlib->name;
+ newlib->resolved = 1;
+ newlib->next = NULL;
+
+#if 0
+ //printf("find_elf_interpreter is adding '%s' to '%s'\n", newlib->name, newlib->path);
+ if (!lib_list) {
+ lib_list = newlib;
+ } else {
+ for (cur = lib_list; cur->next; cur=cur->next); /* nothing */
+ cur->next = newlib;
+ }
+#endif
+ interpreter_already_found=1;
+ return newlib;
+ }
+ return NULL;
+}
+
+/* map the .so, and locate interesting pieces */
+int find_dependancies(char* filename)
+{
+ int is_suid = 0;
+ FILE *thefile;
+ struct stat statbuf;
+ char *dynstr=NULL;
+ Elf32_Ehdr *ehdr = NULL;
+ Elf32_Shdr *dynsec = NULL;
+ Elf32_Dyn *dynamic = NULL;
+ struct library *interp;
+
+ if (filename == not_found)
+ return 0;
+
+ if (!filename) {
+ fprintf(stderr, "No filename specified.\n");
+ return -1;
+ }
+ if (!(thefile = fopen(filename, "r"))) {
+ perror(filename);
+ return -1;
+ }
+ if (fstat(fileno(thefile), &statbuf) < 0) {
+ perror(filename);
+ return -1;
+ }
+
+ if ((size_t)statbuf.st_size < sizeof(Elf32_Ehdr))
+ goto foo;
+
+ if (!S_ISREG(statbuf.st_mode))
+ goto foo;
+
+ /* mmap the file to make reading stuff from it effortless */
+ ehdr = (Elf32_Ehdr *)mmap(0, statbuf.st_size,
+ PROT_READ|PROT_WRITE, MAP_PRIVATE, fileno(thefile), 0);
+
+foo:
+ /* Check if this looks like a legit ELF file */
+ if (check_elf_header(ehdr)) {
+ fprintf(stderr, "%s: not an ELF file.\n", filename);
+ return -1;
+ }
+ /* Check if this is the right kind of ELF file */
+ if (ehdr->e_type != ET_EXEC && ehdr->e_type != ET_DYN) {
+ fprintf(stderr, "%s: not a dynamic executable\n", filename);
+ return -1;
+ }
+ if (ehdr->e_type == ET_EXEC) {
+ if (statbuf.st_mode & S_ISUID)
+ is_suid = 1;
+ if ((statbuf.st_mode & (S_ISGID | S_IXGRP)) == (S_ISGID | S_IXGRP))
+ is_suid = 1;
+ /* FIXME */
+ if (is_suid)
+ fprintf(stderr, "%s: is setuid\n", filename);
+ }
+
+ interpreter_already_found=0;
+ interp = find_elf_interpreter(ehdr);
+
+#ifdef __LDSO_LDD_SUPPORT
+ if (interp && ehdr->e_type == ET_EXEC && ehdr->e_ident[EI_CLASS] == ELFCLASSM &&
+ ehdr->e_ident[EI_DATA] == ELFDATAM
+ && ehdr->e_ident[EI_VERSION] == EV_CURRENT && MATCH_MACHINE(ehdr->e_machine))
+ {
+ struct stat statbuf;
+ if (stat(interp->path, &statbuf) == 0 && S_ISREG(statbuf.st_mode)) {
+ pid_t pid;
+ int status;
+ static const char * const environment[] = {
+ "PATH=/usr/bin:/bin:/usr/sbin:/sbin",
+ "SHELL=/bin/sh",
+ "LD_TRACE_LOADED_OBJECTS=1",
+ NULL
+ };
+
+ if ((pid = fork()) == 0) {
+ /* Cool, it looks like we should be able to actually
+ * run this puppy. Do so now... */
+ execle(filename, filename, NULL, environment);
+ _exit(0xdead);
+ }
+
+ /* Wait till it returns */
+ waitpid(pid, &status, 0);
+ if (WIFEXITED(status) && WEXITSTATUS(status)==0) {
+ return 1;
+ }
+
+ /* If the exec failed, we fall through to trying to find
+ * all the needed libraries ourselves by rummaging about
+ * in the ELF headers... */
+ }
+ }
+#endif
+
+ dynsec = elf_find_section_type(SHT_DYNAMIC, ehdr);
+ if (dynsec) {
+ dynamic = (Elf32_Dyn*)(byteswap32_to_host(dynsec->sh_offset) + (intptr_t)ehdr);
+ dynstr = (char *)elf_find_dynamic(DT_STRTAB, dynamic, ehdr, 0);
+ find_needed_libraries(ehdr, dynamic, dynstr, is_suid);
+ }
+
+ return 0;
+}
+
+
+
+int main( int argc, char** argv)
+{
+ int multi=0;
+ int got_em_all=1;
+ char *filename = NULL;
+ struct library *cur;
+
+ if (argc < 2) {
+ fprintf(stderr, "ldd: missing file arguments\n");
+ fprintf(stderr, "Try `ldd --help' for more information.\n");
+ exit(EXIT_FAILURE);
+ }
+ if (argc > 2) {
+ multi++;
+ }
+
+ while (--argc > 0) {
+ ++argv;
+
+ if(strcmp(*argv, "--")==0) {
+ /* Ignore "--" */
+ continue;
+ }
+
+ if(strcmp(*argv, "--help")==0) {
+ fprintf(stderr, "Usage: ldd [OPTION]... FILE...\n");
+ fprintf(stderr, "\t--help\t\tprint this help and exit\n");
+ exit(EXIT_FAILURE);
+ }
+
+ filename=*argv;
+ if (!filename) {
+ fprintf(stderr, "No filename specified.\n");
+ exit(EXIT_FAILURE);
+ }
+
+ if (multi) {
+ printf("%s:\n", *argv);
+ }
+
+ if (find_dependancies(filename)!=0)
+ continue;
+
+ while(got_em_all) {
+ got_em_all=0;
+ /* Keep walking the list till everybody is resolved */
+ for (cur = lib_list; cur; cur=cur->next) {
+ if (cur->resolved == 0 && cur->path) {
+ got_em_all=1;
+ //printf("checking sub-depends for '%s\n", cur->path);
+ find_dependancies(cur->path);
+ cur->resolved = 1;
+ }
+ }
+ }
+
+
+ /* Print the list */
+ got_em_all=0;
+ for (cur = lib_list; cur; cur=cur->next) {
+ got_em_all=1;
+ printf("\t%s => %s (0x00000000)\n", cur->name, cur->path);
+ }
+ if (interp_dir && got_em_all==1)
+ printf("\t%s => %s (0x00000000)\n", interp, interp);
+ if (got_em_all==0)
+ printf("\tnot a dynamic executable\n");
+
+ for (cur = lib_list; cur; cur=cur->next) {
+ free(cur->name);
+ cur->name=NULL;
+ free(cur->path);
+ cur->path=NULL;
+ }
+ lib_list=NULL;
+ }
+
+ return 0;
+}
+
diff --git a/utils/readelf.c b/utils/readelf.c
new file mode 100644
index 000000000..1d53c4c3d
--- /dev/null
+++ b/utils/readelf.c
@@ -0,0 +1,348 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * A small little readelf implementation for uClibc
+ *
+ * Copyright (C) 2000 by Lineo, inc and Erik Andersen
+ * Copyright (C) 2000-2002 Erik Andersen <andersee@debian.org>
+ *
+ * Several functions in this file (specifically, elf_find_section_type(),
+ * elf_find_phdr_type(), and elf_find_dynamic(), were stolen from elflib.c from
+ * elfvector (http://www.BitWagon.com/elfvector.html) by John F. Reiser
+ * <jreiser@BitWagon.com>, which is copyright 2000 BitWagon Software LLC
+ * (GPL2).
+ *
+ * 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 of the License, 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/mman.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+
+#include "bswap.h"
+#include "elf.h"
+
+
+int byteswap;
+inline uint32_t byteswap32_to_host(uint32_t value)
+{
+ if (byteswap==1) {
+ return(bswap_32(value));
+ } else {
+ return(value);
+ }
+}
+
+Elf32_Shdr * elf_find_section_type( int key, Elf32_Ehdr *ehdr)
+{
+ int j;
+ Elf32_Shdr *shdr = (Elf32_Shdr *)(ehdr->e_shoff + (char *)ehdr);
+ for (j = ehdr->e_shnum; --j>=0; ++shdr) {
+ if (key==(int)byteswap32_to_host(shdr->sh_type)) {
+ return shdr;
+ }
+ }
+ return NULL;
+}
+
+Elf32_Phdr * elf_find_phdr_type( int type, Elf32_Ehdr *ehdr)
+{
+ int j;
+ Elf32_Phdr *phdr = (Elf32_Phdr *)(ehdr->e_phoff + (char *)ehdr);
+ for (j = ehdr->e_phnum; --j>=0; ++phdr) {
+ if (type==(int)byteswap32_to_host(phdr->p_type)) {
+ return phdr;
+ }
+ }
+ return NULL;
+}
+
+/* Returns value if return_val==1, ptr otherwise */
+void * elf_find_dynamic(int const key, Elf32_Dyn *dynp,
+ Elf32_Ehdr *ehdr, int return_val)
+{
+ Elf32_Phdr *pt_text = elf_find_phdr_type(PT_LOAD, ehdr);
+ unsigned tx_reloc = byteswap32_to_host(pt_text->p_vaddr) - byteswap32_to_host(pt_text->p_offset);
+ for (; DT_NULL!=byteswap32_to_host(dynp->d_tag); ++dynp) {
+ if (key == (int)byteswap32_to_host(dynp->d_tag)) {
+ if (return_val == 1)
+ return (void *)(intptr_t)byteswap32_to_host(dynp->d_un.d_val);
+ else
+ return (void *)(byteswap32_to_host(dynp->d_un.d_val) - tx_reloc + (char *)ehdr );
+ }
+ }
+ return NULL;
+}
+
+int check_elf_header(Elf32_Ehdr *const ehdr)
+{
+ if (! ehdr || strncmp((void *)ehdr, ELFMAG, SELFMAG) != 0 ||
+ ehdr->e_ident[EI_CLASS] != ELFCLASS32 ||
+ ehdr->e_ident[EI_VERSION] != EV_CURRENT)
+ {
+ return 1;
+ }
+
+ /* Check if the target endianness matches the host's endianness */
+ byteswap = 0;
+#if __BYTE_ORDER == __LITTLE_ENDIAN
+ if (ehdr->e_ident[5] == ELFDATA2MSB) {
+ /* Ick -- we will have to byte-swap everything */
+ byteswap = 1;
+ }
+#elif __BYTE_ORDER == __BIG_ENDIAN
+ if (ehdr->e_ident[5] == ELFDATA2LSB) {
+ byteswap = 1;
+ }
+#else
+#error Unknown host byte order!
+#endif
+ /* Be vary lazy, and only byteswap the stuff we use */
+ if (byteswap==1) {
+ ehdr->e_type=bswap_16(ehdr->e_type);
+ ehdr->e_machine=bswap_16(ehdr->e_machine);
+ ehdr->e_phoff=bswap_32(ehdr->e_phoff);
+ ehdr->e_shoff=bswap_32(ehdr->e_shoff);
+ ehdr->e_phnum=bswap_16(ehdr->e_phnum);
+ ehdr->e_shnum=bswap_16(ehdr->e_shnum);
+ }
+ return 0;
+}
+
+
+#define ELFOSABI_NONE 0 /* UNIX System V ABI */
+#define ELFOSABI_HPUX 1 /* HP-UX operating system */
+#define ELFOSABI_NETBSD 2 /* NetBSD */
+#define ELFOSABI_LINUX 3 /* GNU/Linux */
+#define ELFOSABI_HURD 4 /* GNU/Hurd */
+#define ELFOSABI_SOLARIS 6 /* Solaris */
+#define ELFOSABI_AIX 7 /* AIX */
+#define ELFOSABI_IRIX 8 /* IRIX */
+#define ELFOSABI_FREEBSD 9 /* FreeBSD */
+#define ELFOSABI_TRU64 10 /* TRU64 UNIX */
+#define ELFOSABI_MODESTO 11 /* Novell Modesto */
+#define ELFOSABI_OPENBSD 12 /* OpenBSD */
+#define ELFOSABI_STANDALONE 255 /* Standalone (embedded) application */
+#define ELFOSABI_ARM 97 /* ARM */
+static void describe_elf_hdr(Elf32_Ehdr* ehdr)
+{
+ char *tmp, *tmp1;
+
+ switch (ehdr->e_type) {
+ case ET_NONE: tmp = "None"; tmp1 = "NONE"; break;
+ case ET_REL: tmp = "Relocatable File"; tmp1 = "REL"; break;
+ case ET_EXEC: tmp = "Executable file"; tmp1 = "EXEC"; break;
+ case ET_DYN: tmp = "Shared object file"; tmp1 = "DYN"; break;
+ case ET_CORE: tmp = "Core file"; tmp1 = "CORE"; break;
+ default:
+ tmp = tmp1 = "Unknown";
+ }
+ printf( "Type:\t\t%s (%s)\n", tmp1, tmp);
+
+ switch (ehdr->e_machine) {
+ case EM_NONE: tmp="No machine"; break;
+ case EM_M32: tmp="AT&T WE 32100"; break;
+ case EM_SPARC: tmp="SUN SPARC"; break;
+ case EM_386: tmp="Intel 80386"; break;
+ case EM_68K: tmp="Motorola m68k family"; break;
+ case EM_88K: tmp="Motorola m88k family"; break;
+ case EM_860: tmp="Intel 80860"; break;
+ case EM_MIPS: tmp="MIPS R3000 big-endian"; break;
+ case EM_S370: tmp="IBM System/370"; break;
+ case EM_MIPS_RS3_LE: tmp="MIPS R3000 little-endian"; break;
+ case EM_PARISC: tmp="HPPA"; break;
+ case EM_VPP500: tmp="Fujitsu VPP500"; break;
+ case EM_SPARC32PLUS: tmp="Sun's v8plus"; break;
+ case EM_960: tmp="Intel 80960"; break;
+ case EM_PPC: tmp="PowerPC"; break;
+ case EM_PPC64: tmp="PowerPC 64-bit"; break;
+ case EM_S390: tmp="IBM S390"; break;
+ case EM_V800: tmp="NEC V800 series"; break;
+ case EM_FR20: tmp="Fujitsu FR20"; break;
+ case EM_RH32: tmp="TRW RH-32"; break;
+ case EM_RCE: tmp="Motorola RCE"; break;
+ case EM_ARM: tmp="ARM"; break;
+ case EM_FAKE_ALPHA: tmp="Digital Alpha"; break;
+ case EM_SH: tmp="Hitachi SH"; break;
+ case EM_SPARCV9: tmp="SPARC v9 64-bit"; break;
+ case EM_TRICORE: tmp="Siemens Tricore"; break;
+ case EM_ARC: tmp="Argonaut RISC Core"; break;
+ case EM_H8_300: tmp="Hitachi H8/300"; break;
+ case EM_H8_300H: tmp="Hitachi H8/300H"; break;
+ case EM_H8S: tmp="Hitachi H8S"; break;
+ case EM_H8_500: tmp="Hitachi H8/500"; break;
+ case EM_IA_64: tmp="Intel Merced"; break;
+ case EM_MIPS_X: tmp="Stanford MIPS-X"; break;
+ case EM_COLDFIRE: tmp="Motorola Coldfire"; break;
+ case EM_68HC12: tmp="Motorola M68HC12"; break;
+ case EM_MMA: tmp="Fujitsu MMA Multimedia Accelerator"; break;
+ case EM_PCP: tmp="Siemens PCP"; break;
+ case EM_NCPU: tmp="Sony nCPU embeeded RISC"; break;
+ case EM_NDR1: tmp="Denso NDR1 microprocessor"; break;
+ case EM_STARCORE: tmp="Motorola Start*Core processor"; break;
+ case EM_ME16: tmp="Toyota ME16 processor"; break;
+ case EM_ST100: tmp="STMicroelectronic ST100 processor"; break;
+ case EM_TINYJ: tmp="Advanced Logic Corp. Tinyj emb.fam"; break;
+ case EM_X86_64: tmp="AMD x86-64 architecture"; break;
+ case EM_PDSP: tmp="Sony DSP Processor"; break;
+ case EM_FX66: tmp="Siemens FX66 microcontroller"; break;
+ case EM_ST9PLUS: tmp="STMicroelectronics ST9+ 8/16 mc"; break;
+ case EM_ST7: tmp="STmicroelectronics ST7 8 bit mc"; break;
+ case EM_68HC16: tmp="Motorola MC68HC16 microcontroller"; break;
+ case EM_68HC11: tmp="Motorola MC68HC11 microcontroller"; break;
+ case EM_68HC08: tmp="Motorola MC68HC08 microcontroller"; break;
+ case EM_68HC05: tmp="Motorola MC68HC05 microcontroller"; break;
+ case EM_SVX: tmp="Silicon Graphics SVx"; break;
+ case EM_AT19: tmp="STMicroelectronics ST19 8 bit mc"; break;
+ case EM_VAX: tmp="Digital VAX"; break;
+ case EM_CRIS: tmp="Axis Communications 32-bit embedded processor"; break;
+ case EM_JAVELIN: tmp="Infineon Technologies 32-bit embedded processor"; break;
+ case EM_FIREPATH: tmp="Element 14 64-bit DSP Processor"; break;
+ case EM_ZSP: tmp="LSI Logic 16-bit DSP Processor"; break;
+ case EM_MMIX: tmp="Donald Knuth's educational 64-bit processor"; break;
+ case EM_HUANY: tmp="Harvard University machine-independent object files"; break;
+ case EM_PRISM: tmp="SiTera Prism"; break;
+ case EM_AVR: tmp="Atmel AVR 8-bit microcontroller"; break;
+ case EM_FR30: tmp="Fujitsu FR30"; break;
+ case EM_D10V: tmp="Mitsubishi D10V"; break;
+ case EM_D30V: tmp="Mitsubishi D30V"; break;
+ case EM_V850: tmp="NEC v850"; break;
+ case EM_M32R: tmp="Mitsubishi M32R"; break;
+ case EM_MN10300: tmp="Matsushita MN10300"; break;
+ case EM_MN10200: tmp="Matsushita MN10200"; break;
+ case EM_PJ: tmp="picoJava"; break;
+ default: tmp="unknown";
+ }
+ printf( "Machine:\t%s\n", tmp);
+
+ switch (ehdr->e_ident[EI_CLASS]) {
+ case ELFCLASSNONE: tmp = "Invalid class"; break;
+ case ELFCLASS32: tmp = "ELF32"; break;
+ case ELFCLASS64: tmp = "ELF64"; break;
+ default: tmp = "Unknown";
+ }
+ printf( "Class:\t\t%s\n", tmp);
+
+ switch (ehdr->e_ident[EI_DATA]) {
+ case ELFDATANONE: tmp = "Invalid data encoding"; break;
+ case ELFDATA2LSB: tmp = "2's complement, little endian"; break;
+ case ELFDATA2MSB: tmp = "2's complement, big endian"; break;
+ default: tmp = "Unknown";
+ }
+ printf( "Data:\t\t%s\n", tmp);
+
+ printf( "Version:\t%d %s\n", ehdr->e_ident[EI_VERSION],
+ (ehdr->e_ident[EI_VERSION]==EV_CURRENT)?
+ "(current)" : "(unknown: %lx)");
+
+ switch (ehdr->e_ident[EI_OSABI]) {
+ case ELFOSABI_SYSV: tmp ="UNIX - System V"; break;
+ case ELFOSABI_HPUX: tmp ="UNIX - HP-UX"; break;
+ case ELFOSABI_NETBSD: tmp ="UNIX - NetBSD"; break;
+ case ELFOSABI_LINUX: tmp ="UNIX - Linux"; break;
+ case ELFOSABI_HURD: tmp ="GNU/Hurd"; break;
+ case ELFOSABI_SOLARIS: tmp ="UNIX - Solaris"; break;
+ case ELFOSABI_AIX: tmp ="UNIX - AIX"; break;
+ case ELFOSABI_IRIX: tmp ="UNIX - IRIX"; break;
+ case ELFOSABI_FREEBSD: tmp ="UNIX - FreeBSD"; break;
+ case ELFOSABI_TRU64: tmp ="UNIX - TRU64"; break;
+ case ELFOSABI_MODESTO: tmp ="Novell - Modesto"; break;
+ case ELFOSABI_OPENBSD: tmp ="UNIX - OpenBSD"; break;
+ case ELFOSABI_STANDALONE: tmp ="Standalone App"; break;
+ case ELFOSABI_ARM: tmp ="ARM"; break;
+ default: tmp = "Unknown";
+ }
+ printf( "OS/ABI:\t\t%s\n", tmp);
+
+ printf( "ABI Version:\t%d\n", ehdr->e_ident[EI_ABIVERSION]);
+}
+
+static void list_needed_libraries(Elf32_Dyn* dynamic, char *strtab)
+{
+ Elf32_Dyn *dyns;
+
+ printf("Dependancies:\n");
+ for (dyns=dynamic; byteswap32_to_host(dyns->d_tag)!=DT_NULL; ++dyns) {
+ if (dyns->d_tag == DT_NEEDED) {
+ printf("\t%s\n", (char*)strtab + byteswap32_to_host(dyns->d_un.d_val));
+ }
+ }
+}
+
+static void describe_elf_interpreter(Elf32_Ehdr* ehdr)
+{
+ Elf32_Phdr *phdr;
+ phdr = elf_find_phdr_type(PT_INTERP, ehdr);
+ if (phdr) {
+ printf("Interpreter:\t%s\n", (char*)ehdr + byteswap32_to_host(phdr->p_offset));
+ }
+}
+
+int main( int argc, char** argv)
+{
+ /* map the .so, and locate interesting pieces */
+ char *dynstr;
+ char *thefilename = argv[1];
+ FILE *thefile;
+ struct stat statbuf;
+ Elf32_Ehdr *ehdr = 0;
+ Elf32_Shdr *dynsec;
+ Elf32_Dyn *dynamic;
+
+ if (argc < 2 || !thefilename) {
+ fprintf(stderr, "No filename specified.\n");
+ exit(EXIT_FAILURE);
+ }
+ if (!(thefile = fopen(thefilename, "r"))) {
+ perror(thefilename);
+ exit(EXIT_FAILURE);
+ }
+ if (fstat(fileno(thefile), &statbuf) < 0) {
+ perror(thefilename);
+ exit(EXIT_FAILURE);
+ }
+
+ if ((size_t)statbuf.st_size < sizeof(Elf32_Ehdr))
+ goto foo;
+
+ /* mmap the file to make reading stuff from it effortless */
+ ehdr = (Elf32_Ehdr *)mmap(0, statbuf.st_size,
+ PROT_READ|PROT_WRITE, MAP_PRIVATE, fileno(thefile), 0);
+
+foo:
+ /* Check if this looks legit */
+ if (check_elf_header(ehdr)) {
+ fprintf(stderr, "This does not appear to be an ELF file.\n");
+ exit(EXIT_FAILURE);
+ }
+ describe_elf_hdr(ehdr);
+ describe_elf_interpreter(ehdr);
+
+ dynsec = elf_find_section_type(SHT_DYNAMIC, ehdr);
+ if (dynsec) {
+ dynamic = (Elf32_Dyn*)(byteswap32_to_host(dynsec->sh_offset) + (intptr_t)ehdr);
+ dynstr = (char *)elf_find_dynamic(DT_STRTAB, dynamic, ehdr, 0);
+ list_needed_libraries(dynamic, dynstr);
+ }
+
+ return 0;
+}
+
diff --git a/utils/readsoname.c b/utils/readsoname.c
new file mode 100644
index 000000000..12c2428f2
--- /dev/null
+++ b/utils/readsoname.c
@@ -0,0 +1,63 @@
+/* adapted from Eric Youngdale's readelf program */
+
+#include <stdio.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <sys/mman.h>
+#include <link.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <ld_elf.h>
+#include "readsoname.h"
+
+void warn(char *fmt, ...);
+char *xstrdup(char *);
+
+struct needed_tab
+{
+ char *soname;
+ int type;
+};
+
+struct needed_tab needed_tab[] = {
+ { "libc.so.0", LIB_ELF_LIBC0 },
+ { "libm.so.0", LIB_ELF_LIBC0 },
+ { "libdl.so.0", LIB_ELF_LIBC0 },
+ { "libc.so.5", LIB_ELF_LIBC5 },
+ { "libm.so.5", LIB_ELF_LIBC5 },
+ { "libdl.so.1", LIB_ELF_LIBC5 },
+ { "libc.so.6", LIB_ELF_LIBC6 },
+ { "libm.so.6", LIB_ELF_LIBC6 },
+ { "libdl.so.2", LIB_ELF_LIBC6 },
+ { NULL, LIB_ELF }
+};
+
+char *readsoname(char *name, FILE *infile, int expected_type,
+ int *type, int elfclass)
+{
+ char *res;
+
+ if (elfclass == ELFCLASS32)
+ res = readsoname32(name, infile, expected_type, type);
+ else
+ {
+ res = readsoname64(name, infile, expected_type, type);
+#if 0
+ *type |= LIB_ELF64;
+#endif
+ }
+
+ return res;
+}
+
+#undef __ELF_NATIVE_CLASS
+#undef readsonameXX
+#define readsonameXX readsoname32
+#define __ELF_NATIVE_CLASS 32
+#include "readsoname2.c"
+
+#undef __ELF_NATIVE_CLASS
+#undef readsonameXX
+#define readsonameXX readsoname64
+#define __ELF_NATIVE_CLASS 64
+#include "readsoname2.c"
diff --git a/utils/readsoname.h b/utils/readsoname.h
new file mode 100644
index 000000000..78d2216e0
--- /dev/null
+++ b/utils/readsoname.h
@@ -0,0 +1,4 @@
+char *readsoname(char *name, FILE *file, int expected_type,
+ int *type, int elfclass);
+char *readsoname32(char *name, FILE *file, int expected_type, int *type);
+char *readsoname64(char *name, FILE *file, int expected_type, int *type);
diff --git a/utils/readsoname2.c b/utils/readsoname2.c
new file mode 100644
index 000000000..1bf47b7c6
--- /dev/null
+++ b/utils/readsoname2.c
@@ -0,0 +1,115 @@
+char *readsonameXX(char *name, FILE *infile, int expected_type, int *type)
+{
+ ElfW(Ehdr) *epnt;
+ ElfW(Phdr) *ppnt;
+ int i, j;
+ char *header;
+ ElfW(Word) dynamic_addr = 0;
+ ElfW(Word) dynamic_size = 0;
+ unsigned long page_size = getpagesize();
+ ElfW(Word) strtab_val = 0;
+ ElfW(Word) needed_val;
+ ElfW(Sword) loadaddr = -1;
+ ElfW(Dyn) *dpnt;
+ struct stat st;
+ char *needed;
+ char *soname = NULL;
+ int multi_libcs = 0;
+
+ if(expected_type == LIB_DLL)
+ {
+ warn("%s does not match type specified for directory!", name);
+ expected_type = LIB_ANY;
+ }
+
+ *type = LIB_ELF;
+
+ if (fstat(fileno(infile), &st))
+ return NULL;
+ header = mmap(0, st.st_size, PROT_READ, MAP_SHARED, fileno(infile), 0);
+ if (header == (caddr_t)-1)
+ return NULL;
+
+ epnt = (ElfW(Ehdr) *)header;
+ if ((char *)(epnt+1) > (char *)(header + st.st_size))
+ goto skip;
+
+ ppnt = (ElfW(Phdr) *)&header[epnt->e_phoff];
+ if ((char *)ppnt < (char *)header ||
+ (char *)(ppnt+epnt->e_phnum) > (char *)(header + st.st_size))
+ goto skip;
+
+ for(i = 0; i < epnt->e_phnum; i++)
+ {
+ if (loadaddr == -1 && ppnt->p_type == PT_LOAD)
+ loadaddr = (ppnt->p_vaddr & ~(page_size-1)) -
+ (ppnt->p_offset & ~(page_size-1));
+ if(ppnt->p_type == 2)
+ {
+ dynamic_addr = ppnt->p_offset;
+ dynamic_size = ppnt->p_filesz;
+ };
+ ppnt++;
+ };
+
+ dpnt = (ElfW(Dyn) *) &header[dynamic_addr];
+ dynamic_size = dynamic_size / sizeof(ElfW(Dyn));
+ if ((char *)dpnt < (char *)header ||
+ (char *)(dpnt+dynamic_size) > (char *)(header + st.st_size))
+ goto skip;
+
+ while (dpnt->d_tag != DT_NULL)
+ {
+ if (dpnt->d_tag == DT_STRTAB)
+ strtab_val = dpnt->d_un.d_val;
+ dpnt++;
+ };
+
+ if (!strtab_val)
+ goto skip;
+
+ dpnt = (ElfW(Dyn) *) &header[dynamic_addr];
+ while (dpnt->d_tag != DT_NULL)
+ {
+ if (dpnt->d_tag == DT_SONAME || dpnt->d_tag == DT_NEEDED)
+ {
+ needed_val = dpnt->d_un.d_val;
+ if (needed_val + strtab_val - loadaddr >= 0 ||
+ needed_val + strtab_val - loadaddr < st.st_size)
+ {
+ needed = (char *) (header - loadaddr + strtab_val + needed_val);
+
+ if (dpnt->d_tag == DT_SONAME)
+ soname = xstrdup(needed);
+
+ for (j = 0; needed_tab[j].soname != NULL; j++)
+ {
+ if (strcmp(needed, needed_tab[j].soname) == 0)
+ {
+ if (*type != LIB_ELF && *type != needed_tab[j].type)
+ multi_libcs = 1;
+ *type = needed_tab[j].type;
+ }
+ }
+ }
+ }
+ dpnt++;
+ };
+
+ if (multi_libcs)
+ warn("%s appears to be for multiple libc's", name);
+
+ /* If we could not deduce the libc type, and we know what to expect, set the type */
+ if(*type == LIB_ELF && expected_type != LIB_ANY) *type = expected_type;
+
+ if(expected_type != LIB_ANY && expected_type != LIB_ELF &&
+ expected_type != *type)
+ {
+ warn("%s does not match type specified for directory!", name);
+ }
+
+ skip:
+ munmap(header, st.st_size);
+
+ return soname;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-06 05:08:19 +0000