[T106][ZXW-22]7520V3SCV2.01.01.02P42U09_VEC_V0.8_AP_VEC origin source commit
Change-Id: Ic6e05d89ecd62fc34f82b23dcf306c93764aec4b
diff --git a/ap/build/uClibc/utils/ldd.c b/ap/build/uClibc/utils/ldd.c
new file mode 100644
index 0000000..04fbbc6
--- /dev/null
+++ b/ap/build/uClibc/utils/ldd.c
@@ -0,0 +1,862 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * A small little ldd implementation for uClibc
+ *
+ * Copyright (C) 2000-2006 Erik Andersen <andersen@uclibc.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).
+ *
+ * Licensed under GPLv2 or later
+ */
+
+#include "porting.h"
+
+#if defined(__alpha__)
+#define MATCH_MACHINE(x) (x == EM_ALPHA)
+#define ELFCLASSM ELFCLASS64
+#endif
+
+#if defined(__arm__) || defined(__thumb__)
+#define MATCH_MACHINE(x) (x == EM_ARM)
+#define ELFCLASSM ELFCLASS32
+#endif
+
+#if defined(__avr32__)
+#define MATCH_MACHINE(x) (x == EM_AVR32)
+#define ELFCLASSM ELFCLASS32
+#endif
+
+#if defined(__s390__)
+#define MATCH_MACHINE(x) (x == EM_S390)
+#define ELFCLASSM ELFCLASS32
+#endif
+
+#if defined(__hppa__)
+#define MATCH_MACHINE(x) (x == EM_PARISC)
+#if defined(__LP64__)
+#define ELFCLASSM ELFCLASS64
+#else
+#define ELFCLASSM ELFCLASS32
+#endif
+#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(__ia64__)
+#define MATCH_MACHINE(x) (x == EM_IA_64)
+#define ELFCLASSM ELFCLASS64
+#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(__powerpc64__)
+#define MATCH_MACHINE(x) (x == EM_PPC64)
+#define ELFCLASSM ELFCLASS64
+#elif 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
+
+#if defined(__cris__)
+#define MATCH_MACHINE(x) (x == EM_CRIS)
+#define ELFCLASSM ELFCLASS32
+#endif
+
+#if defined(__x86_64__)
+#define MATCH_MACHINE(x) (x == EM_X86_64)
+#define ELFCLASSM ELFCLASS64
+#endif
+
+#if defined(__microblaze__)
+#define MATCH_MACHINE(x) (x == EM_MICROBLAZE_OLD)
+#define ELFCLASSM ELFCLASS32
+#endif
+
+#ifndef MATCH_MACHINE
+# ifdef __linux__
+# include <asm/elf.h>
+# endif
+# ifdef ELF_ARCH
+# define MATCH_MACHINE(x) (x == ELF_ARCH)
+# endif
+# ifdef ELF_CLASS
+# define ELFCLASSM ELF_CLASS
+# endif
+#endif
+#ifndef MATCH_MACHINE
+# warning "You really should add a MATCH_MACHINE() macro for your architecture"
+#endif
+
+#if UCLIBC_ENDIAN_HOST == UCLIBC_ENDIAN_LITTLE
+#define ELFDATAM ELFDATA2LSB
+#elif UCLIBC_ENDIAN_HOST == UCLIBC_ENDIAN_BIG
+#define ELFDATAM ELFDATA2MSB
+#endif
+
+#define ARRAY_SIZE(v) (sizeof(v) / sizeof(*v))
+#define TRUSTED_LDSO UCLIBC_RUNTIME_PREFIX "lib/" UCLIBC_LDSO
+
+struct library {
+ char *name;
+ int resolved;
+ char *path;
+ struct library *next;
+};
+static struct library *lib_list = NULL;
+static char not_found[] = "not found";
+static char *interp_name = NULL;
+static char *interp_dir = NULL;
+static int byteswap;
+static int interpreter_already_found = 0;
+
+static __inline__ uint32_t byteswap32_to_host(uint32_t value)
+{
+ if (byteswap == 1) {
+ return (bswap_32(value));
+ } else {
+ return (value);
+ }
+}
+static __inline__ uint64_t byteswap64_to_host(uint64_t value)
+{
+ if (byteswap == 1) {
+ return (bswap_64(value));
+ } else {
+ return (value);
+ }
+}
+
+#if ELFCLASSM == ELFCLASS32
+# define byteswap_to_host(x) byteswap32_to_host(x)
+#else
+# define byteswap_to_host(x) byteswap64_to_host(x)
+#endif
+
+static ElfW(Shdr) *elf_find_section_type(uint32_t key, ElfW(Ehdr) *ehdr)
+{
+ int j;
+ ElfW(Shdr) *shdr;
+ shdr = (ElfW(Shdr) *) (ehdr->e_shoff + (char *)ehdr);
+ for (j = ehdr->e_shnum; --j >= 0; ++shdr) {
+ if (key == byteswap32_to_host(shdr->sh_type)) {
+ return shdr;
+ }
+ }
+ return NULL;
+}
+
+static ElfW(Phdr) *elf_find_phdr_type(uint32_t type, ElfW(Ehdr) *ehdr)
+{
+ int j;
+ ElfW(Phdr) *phdr = (ElfW(Phdr) *) (ehdr->e_phoff + (char *)ehdr);
+ for (j = ehdr->e_phnum; --j >= 0; ++phdr) {
+ if (type == byteswap32_to_host(phdr->p_type)) {
+ return phdr;
+ }
+ }
+ return NULL;
+}
+
+/* Returns value if return_val==1, ptr otherwise */
+static void *elf_find_dynamic(int64_t const key, ElfW(Dyn) *dynp,
+ ElfW(Ehdr) *ehdr, int return_val)
+{
+ ElfW(Phdr) *pt_text = elf_find_phdr_type(PT_LOAD, ehdr);
+ unsigned tx_reloc = byteswap_to_host(pt_text->p_vaddr) - byteswap_to_host(pt_text->p_offset);
+ for (; DT_NULL != byteswap_to_host(dynp->d_tag); ++dynp) {
+ if (key == byteswap_to_host(dynp->d_tag)) {
+ if (return_val == 1)
+ return (void *)byteswap_to_host(dynp->d_un.d_val);
+ else
+ return (void *)(byteswap_to_host(dynp->d_un.d_val) - tx_reloc + (char *)ehdr);
+ }
+ }
+ return NULL;
+}
+
+static char *elf_find_rpath(ElfW(Ehdr) *ehdr, ElfW(Dyn) *dynamic)
+{
+ ElfW(Dyn) *dyns;
+
+ for (dyns = dynamic; byteswap_to_host(dyns->d_tag) != DT_NULL; ++dyns) {
+ if (DT_RPATH == byteswap_to_host(dyns->d_tag)) {
+ char *strtab;
+ strtab = (char *)elf_find_dynamic(DT_STRTAB, dynamic, ehdr, 0);
+ return ((char *)strtab + byteswap_to_host(dyns->d_un.d_val));
+ }
+ }
+ return NULL;
+}
+
+static int check_elf_header(ElfW(Ehdr) *const ehdr)
+{
+ if (!ehdr || *(uint32_t*)ehdr != ELFMAG_U32
+ || ehdr->e_ident[EI_CLASS] != ELFCLASSM
+ || ehdr->e_ident[EI_VERSION] != EV_CURRENT
+ ) {
+ return 1;
+ }
+
+ /* Check if the target endianness matches the host's endianness */
+ byteswap = 0;
+ if (UCLIBC_ENDIAN_HOST == UCLIBC_ENDIAN_LITTLE) {
+ if (ehdr->e_ident[5] == ELFDATA2MSB)
+ byteswap = 1;
+ } else if (UCLIBC_ENDIAN_HOST == UCLIBC_ENDIAN_BIG) {
+ if (ehdr->e_ident[5] == ELFDATA2LSB)
+ byteswap = 1;
+ }
+
+ /* Be very lazy, and only byteswap the stuff we use */
+ if (byteswap) {
+ ehdr->e_type = bswap_16(ehdr->e_type);
+ ehdr->e_phoff = byteswap_to_host(ehdr->e_phoff);
+ ehdr->e_shoff = byteswap_to_host(ehdr->e_shoff);
+ ehdr->e_phnum = bswap_16(ehdr->e_phnum);
+ ehdr->e_shnum = bswap_16(ehdr->e_shnum);
+ }
+
+ return 0;
+}
+
+#ifdef __LDSO_CACHE_SUPPORT__
+static caddr_t cache_addr = NULL;
+static size_t cache_size = 0;
+
+static int map_cache(void)
+{
+ int fd;
+ struct stat st;
+ header_t *header;
+ libentry_t *libent;
+ int i, strtabsize;
+
+ if (cache_addr == (caddr_t) - 1)
+ return -1;
+ else if (cache_addr != NULL)
+ return 0;
+
+ if (stat(LDSO_CACHE, &st) || (fd = open(LDSO_CACHE, O_RDONLY)) < 0) {
+ fprintf(stderr, "ldd: can't open cache '%s'\n", LDSO_CACHE);
+ cache_addr = (caddr_t) - 1; /* so we won't try again */
+ return -1;
+ }
+
+ cache_size = st.st_size;
+ cache_addr = mmap(0, cache_size, PROT_READ, MAP_SHARED, fd, 0);
+ close(fd);
+ if (cache_addr == MAP_FAILED) {
+ fprintf(stderr, "ldd: can't map cache '%s'\n", LDSO_CACHE);
+ return -1;
+ }
+
+ header = (header_t *) cache_addr;
+
+ if (cache_size < sizeof(header_t)
+ || memcmp(header->magic, LDSO_CACHE_MAGIC, LDSO_CACHE_MAGIC_LEN)
+ || memcmp(header->version, LDSO_CACHE_VER, LDSO_CACHE_VER_LEN)
+ || cache_size < (sizeof(header_t) + header->nlibs * sizeof(libentry_t))
+ || cache_addr[cache_size - 1] != '\0')
+ {
+ fprintf(stderr, "ldd: cache '%s' is corrupt\n", LDSO_CACHE);
+ goto fail;
+ }
+
+ strtabsize = cache_size - sizeof(header_t) - header->nlibs * sizeof(libentry_t);
+ libent = (libentry_t *) & header[1];
+
+ for (i = 0; i < header->nlibs; i++) {
+ if (libent[i].sooffset >= strtabsize || libent[i].liboffset >= strtabsize) {
+ fprintf(stderr, "ldd: cache '%s' is corrupt\n", LDSO_CACHE);
+ goto fail;
+ }
+ }
+
+ return 0;
+
+fail:
+ munmap(cache_addr, cache_size);
+ cache_addr = (caddr_t) - 1;
+ return -1;
+}
+
+static int unmap_cache(void)
+{
+ if (cache_addr == NULL || cache_addr == (caddr_t) - 1)
+ return -1;
+
+#if 1
+ munmap(cache_addr, cache_size);
+ cache_addr = NULL;
+#endif
+
+ return 0;
+}
+#else
+static __inline__ void map_cache(void)
+{
+}
+static __inline__ void unmap_cache(void)
+{
+}
+#endif
+
+/* This function's behavior must exactly match that
+ * in uClibc/ldso/ldso/dl-elf.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, "%s: Out of memory!\n", __func__);
+ 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';
+}
+
+static void locate_library_file(ElfW(Ehdr) *ehdr, ElfW(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 = strdup(lib->name);
+ return;
+ }
+
+ /* We need some elbow room here. Make some room... */
+ buf = malloc(1024);
+ if (!buf) {
+ fprintf(stderr, "%s: Out of memory!\n", __func__);
+ 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 = elf_find_rpath(ehdr, dynamic);
+ 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 __LDSO_CACHE_SUPPORT__
+ if (cache_addr != NULL && cache_addr != (caddr_t) - 1) {
+ int i;
+ header_t *header = (header_t *) cache_addr;
+ libentry_t *libent = (libentry_t *) & header[1];
+ char *strs = (char *)&libent[header->nlibs];
+
+ for (i = 0; i < header->nlibs; i++) {
+ if ((libent[i].flags == LIB_ELF ||
+ libent[i].flags == LIB_ELF_LIBC0 ||
+ libent[i].flags == LIB_ELF_LIBC5) &&
+ strcmp(lib->name, strs + libent[i].sooffset) == 0)
+ {
+ lib->path = strdup(strs + libent[i].liboffset);
+ return;
+ }
+ }
+ }
+#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/dl-elf.c */
+ path = UCLIBC_RUNTIME_PREFIX "lib:" UCLIBC_RUNTIME_PREFIX "usr/lib"
+#ifndef __LDSO_CACHE_SUPPORT__
+ ":" UCLIBC_RUNTIME_PREFIX "usr/X11R6/lib"
+#endif
+ ;
+ 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(ElfW(Ehdr) *ehdr, ElfW(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 ldso elsewhere */
+ if (interpreter_already_found && (tmp = strrchr(interp_name, '/')) != NULL) {
+ int len = strlen(interp_dir);
+ if (strcmp(s, interp_name + 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(ElfW(Ehdr) *ehdr, ElfW(Dyn) *dynamic, int is_setuid)
+{
+ ElfW(Dyn) *dyns;
+
+ for (dyns = dynamic; byteswap_to_host(dyns->d_tag) != DT_NULL; ++dyns) {
+ if (DT_NEEDED == byteswap_to_host(dyns->d_tag)) {
+ char *strtab;
+ strtab = (char *)elf_find_dynamic(DT_STRTAB, dynamic, ehdr, 0);
+ add_library(ehdr, dynamic, is_setuid, (char *)strtab + byteswap_to_host(dyns->d_un.d_val));
+ }
+ }
+}
+
+#ifdef __LDSO_LDD_SUPPORT__
+static struct library *find_elf_interpreter(ElfW(Ehdr) *ehdr)
+{
+ ElfW(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 + byteswap_to_host(phdr->p_offset);
+
+ char *tmp, *tmp1;
+ interp_name = strdup(s);
+ interp_dir = strdup(s);
+ tmp = strrchr(interp_dir, '/');
+ if (tmp)
+ *tmp = '\0';
+ else {
+ free(interp_dir);
+ interp_dir = interp_name;
+ }
+ 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);
+ if (newlib->path != not_found) {
+ free(newlib->path);
+ }
+ newlib->name = NULL;
+ newlib->path = NULL;
+ break;
+ }
+ }
+ if (newlib == NULL)
+ newlib = malloc(sizeof(struct library));
+ if (!newlib)
+ return NULL;
+ newlib->name = malloc(strlen(s) + 1);
+ strcpy(newlib->name, s);
+ newlib->path = strdup(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;
+}
+#endif /* __LDSO_LDD_SUPPORT__ */
+
+/* map the .so, and locate interesting pieces */
+/*
+#warning "There may be two warnings here about vfork() clobbering, ignore them"
+*/
+static int find_dependencies(char *filename)
+{
+ int is_suid = 0;
+ FILE *thefile;
+ struct stat statbuf;
+ ElfW(Ehdr) *ehdr = NULL;
+ ElfW(Shdr) *dynsec = NULL;
+ ElfW(Dyn) *dynamic = NULL;
+#ifdef __LDSO_LDD_SUPPORT__
+ struct library *interp;
+#endif
+
+ 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);
+ fclose(thefile);
+ return -1;
+ }
+
+ if ((size_t) statbuf.st_size < sizeof(ElfW(Ehdr)))
+ goto foo;
+
+ if (!S_ISREG(statbuf.st_mode))
+ goto foo;
+
+ /* mmap the file to make reading stuff from it effortless */
+ ehdr = mmap(0, statbuf.st_size, PROT_READ | PROT_WRITE, MAP_PRIVATE, fileno(thefile), 0);
+ if (ehdr == MAP_FAILED) {
+ fclose(thefile);
+ fprintf(stderr, "mmap(%s) failed: %s\n", filename, strerror(errno));
+ return -1;
+ }
+
+foo:
+ fclose(thefile);
+
+ /* 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 || ehdr->e_type == ET_DYN) {
+ 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;
+#ifdef __LDSO_LDD_SUPPORT__
+ interp = find_elf_interpreter(ehdr);
+
+ if (interp
+ && (ehdr->e_type == ET_EXEC || ehdr->e_type == ET_DYN)
+ && 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 st;
+ if (stat(interp->path, &st) == 0 && S_ISREG(st.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
+ };
+# ifdef __LDSO_STANDALONE_SUPPORT__
+ char * lib_path = getenv("LD_LIBRARY_PATH");
+ /* The 'extended' environment inclusing the LD_LIBRARY_PATH */
+ static char *ext_environment[ARRAY_SIZE(environment) + 1];
+ char **envp = (char **) environment;
+
+ if (lib_path) {
+ /*
+ * If the LD_LIBRARY_PATH is set, it needs to include it
+ * into the environment for the new process to be spawned
+ */
+ char ** eenvp = (char **) ext_environment;
+
+ /* Copy the N-1 environment's entries */
+ while (*envp)
+ *eenvp++=*envp++;
+
+ /* Make room for LD_LIBRARY_PATH */
+ *eenvp = (char *) malloc(sizeof("LD_LIBRARY_PATH=")
+ + strlen(lib_path));
+ strcpy(*eenvp, "LD_LIBRARY_PATH=");
+ strcat(*eenvp, lib_path);
+ lib_path = *eenvp;
+ /* ext_environment[size] is already NULL */
+
+ /* Use the extended environment */
+ envp = ext_environment;
+ }
+ if ((pid = vfork()) == 0) {
+ /*
+ * Force to use the standard dynamic linker in stand-alone mode.
+ * It will fails at runtime if support is not actually available
+ */
+ execle(TRUSTED_LDSO, TRUSTED_LDSO, filename, NULL, envp);
+ _exit(0xdead);
+ }
+# else
+ if ((pid = vfork()) == 0) {
+ /* Cool, it looks like we should be able to actually
+ * run this puppy. Do so now... */
+ execle(filename, filename, NULL, environment);
+ _exit(0xdead);
+ }
+# endif
+ /* Wait till it returns */
+ waitpid(pid, &status, 0);
+
+# ifdef __LDSO_STANDALONE_SUPPORT__
+ /* Do not leak */
+ free(lib_path);
+# endif
+
+ 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 = (ElfW(Dyn) *) (byteswap_to_host(dynsec->sh_offset) + (char *)ehdr);
+ find_needed_libraries(ehdr, dynamic, 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"
+ "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 || strcmp(*argv, "-h") == 0) {
+ fprintf(stderr, "Usage: ldd [OPTION]... FILE...\n"
+ "\t--help\t\tprint this help and exit\n");
+ exit(EXIT_SUCCESS);
+ }
+
+ filename = *argv;
+ if (!filename) {
+ fprintf(stderr, "No filename specified.\n");
+ exit(EXIT_FAILURE);
+ }
+
+ if (multi) {
+ printf("%s:\n", *argv);
+ }
+
+ map_cache();
+
+ if (find_dependencies(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_dependencies(cur->path);
+ cur->resolved = 1;
+ }
+ }
+ }
+
+ unmap_cache();
+
+ /* 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_name && interpreter_already_found == 1)
+ printf("\t%s => %s (0x00000000)\n", interp_name, interp_name);
+ else
+ printf("\tnot a dynamic executable\n");
+
+ for (cur = lib_list; cur; cur = cur->next) {
+ free(cur->name);
+ cur->name = NULL;
+ if (cur->path && cur->path != not_found) {
+ free(cur->path);
+ cur->path = NULL;
+ }
+ }
+ lib_list = NULL;
+ }
+
+ return 0;
+}