* SUCH DAMAGE.
*/
-
#include "ldso.h"
+#include "unsecvars.h"
#define ALLOW_ZERO_PLTGOT
#include "dl-progname.h"
/* Global variables used within the shared library loader */
-char *_dl_library_path = 0; /* Where we look for libraries */
-char *_dl_preload = 0; /* Things to be loaded before the libs */
-char *_dl_ldsopath = 0; /* Location of the shared lib loader */
-int _dl_secure = 1; /* Are we dealing with setuid stuff? */
-int _dl_errno = 0; /* We can't use the real errno in ldso */
-size_t _dl_pagesize = 0; /* Store the page size for use later */
-struct r_debug *_dl_debug_addr = NULL; /* Used to communicate with the gdb debugger */
-
-
+char *_dl_library_path = 0; /* Where we look for libraries */
+char *_dl_preload = 0; /* Things to be loaded before the libs */
+char *_dl_ldsopath = 0; /* Location of the shared lib loader */
+int _dl_secure = 1; /* Are we dealing with setuid stuff? */
+int _dl_errno = 0; /* We can't use the real errno in ldso */
+size_t _dl_pagesize = 0; /* Store the page size for use later */
+struct r_debug *_dl_debug_addr = NULL; /* Used to communicate with the gdb debugger */
+void *(*_dl_malloc_function) (size_t size) = NULL;
#ifdef __SUPPORT_LD_DEBUG__
char *_dl_debug = 0;
int _dl_debug_file = 2;
#endif
+#include "dl-startup.c"
/* Forward function declarations */
static int _dl_suid_ok(void);
{
}
-static unsigned char *_dl_malloc_addr = 0; /* Lets _dl_malloc use the already allocated memory page */
-static unsigned char *_dl_mmap_zero = 0; /* Also used by _dl_malloc */
-
-
+static unsigned char *_dl_malloc_addr = 0; /* Lets _dl_malloc use the already allocated memory page */
+static unsigned char *_dl_mmap_zero = 0; /* Also used by _dl_malloc */
#if defined (__SUPPORT_LD_DEBUG__)
static void debug_fini (int status, void *arg)
#endif
void _dl_get_ready_to_run(struct elf_resolve *tpnt, unsigned long load_addr,
- Elf32_auxv_t auxvt[AT_EGID + 1], char **envp, struct r_debug *debug_addr,
- unsigned char *malloc_buffer, unsigned char *mmap_zero, char **argv)
+ Elf32_auxv_t auxvt[AT_EGID + 1], char **envp,
+ char **argv)
{
ElfW(Phdr) *ppnt;
Elf32_Dyn *dpnt;
char *lpntstr;
- int i, goof = 0, unlazy = 0, trace_loaded_objects = 0;
+ int i, nlist, goof = 0, unlazy = 0, trace_loaded_objects = 0;
+ struct elf_resolve **init_fini_list;
struct dyn_elf *rpnt;
struct elf_resolve *tcurr;
struct elf_resolve *tpnt1;
struct elf_resolve app_tpnt_tmp;
struct elf_resolve *app_tpnt = &app_tpnt_tmp;
- unsigned long brk_addr, *lpnt;
+ struct r_debug *debug_addr;
+ unsigned long *lpnt;
int (*_dl_atexit) (void *);
+ unsigned long *_dl_envp; /* The environment address */
+ ElfW(Addr) relro_addr = 0;
+ size_t relro_size = 0;
#if defined (__SUPPORT_LD_DEBUG__)
int (*_dl_on_exit) (void (*FUNCTION)(int STATUS, void *ARG),void*);
#endif
SEND_STDERR("Cool, we managed to make a function call.\n");
#endif
+ /* Store the page size for later use */
+ _dl_pagesize = (auxvt[AT_PAGESZ].a_un.a_val) ? (size_t) auxvt[AT_PAGESZ].a_un.a_val : PAGE_SIZE;
/* Make it so _dl_malloc can use the page of memory we have already
* allocated. We shouldn't need to grab any more memory. This must
- * be first since things like _dl_dprintf() use _dl_malloc().... */
- _dl_malloc_addr = malloc_buffer;
- _dl_mmap_zero = mmap_zero;
-
- /* Store the page size for later use */
- _dl_pagesize = (auxvt[AT_PAGESZ].a_un.a_val)? auxvt[AT_PAGESZ].a_un.a_val : PAGE_SIZE;
+ * be first since things like _dl_dprintf() use _dl_malloc()...
+ */
+ _dl_malloc_addr = (unsigned char *)_dl_pagesize;
+ _dl_mmap_zero = 0;
/* Now we have done the mandatory linking of some things. We are now
- * free to start using global variables, since these things have all been
- * fixed up by now. Still no function calls outside of this library ,
- * since the dynamic resolver is not yet ready. */
+ * free to start using global variables, since these things have all
+ * been fixed up by now. Still no function calls outside of this
+ * library, since the dynamic resolver is not yet ready.
+ */
if (argv[0]) {
_dl_progname = argv[0];
}
/* Start to build the tables of the modules that are required for
* this beast to run. We start with the basic executable, and then
* go from there. Eventually we will run across ourself, and we
- * will need to properly deal with that as well. */
- {
- ElfW(Ehdr) *epnt;
- ElfW(Phdr) *myppnt;
- int j;
-
- epnt = (ElfW(Ehdr) *) auxvt[AT_BASE].a_un.a_ptr;
- tpnt->n_phent = epnt->e_phnum;
- tpnt->ppnt = myppnt = (ElfW(Phdr) *) (load_addr + epnt->e_phoff);
- for (j = 0; j < epnt->e_phnum; j++, myppnt++) {
- if (myppnt->p_type == PT_DYNAMIC) {
- tpnt->dynamic_addr = (ElfW(Dyn) *)myppnt->p_vaddr + load_addr;
- tpnt->dynamic_size = myppnt->p_filesz;
- }
- }
- }
-
- brk_addr = 0;
+ * will need to properly deal with that as well.
+ */
rpnt = NULL;
if (_dl_getenv("LD_BIND_NOW", envp))
unlazy = RTLD_NOW;
/* At this point we are now free to examine the user application,
- and figure out which libraries are supposed to be called. Until
- we have this list, we will not be completely ready for dynamic linking */
+ * and figure out which libraries are supposed to be called. Until
+ * we have this list, we will not be completely ready for dynamic
+ * linking.
+ */
- /* Find the runtime load address of the main executable, this may be
+ /* Find the runtime load address of the main executable. This may be
* different from what the ELF header says for ET_DYN/PIE executables.
*/
{
int i;
ElfW(Phdr) *ppnt = (ElfW(Phdr) *) auxvt[AT_PHDR].a_un.a_ptr;
+
for (i = 0; i < auxvt[AT_PHNUM].a_un.a_val; i++, ppnt++)
if (ppnt->p_type == PT_PHDR) {
app_tpnt->loadaddr = (ElfW(Addr)) (auxvt[AT_PHDR].a_un.a_val - ppnt->p_vaddr);
#endif
}
+ /*
+ * This is used by gdb to locate the chain of shared libraries that are
+ * currently loaded.
+ */
+ debug_addr = _dl_malloc(sizeof(struct r_debug));
+ _dl_memset(debug_addr, 0, sizeof(struct r_debug));
ppnt = (ElfW(Phdr) *) auxvt[AT_PHDR].a_un.a_ptr;
for (i = 0; i < auxvt[AT_PHNUM].a_un.a_val; i++, ppnt++) {
- if (ppnt->p_type == PT_LOAD) {
- if (ppnt->p_vaddr + app_tpnt->loadaddr + ppnt->p_memsz > brk_addr)
- brk_addr = ppnt->p_vaddr + app_tpnt->loadaddr + ppnt->p_memsz;
+ if (ppnt->p_type == PT_GNU_RELRO) {
+ relro_addr = ppnt->p_vaddr;
+ relro_size = ppnt->p_memsz;
}
if (ppnt->p_type == PT_DYNAMIC) {
dpnt = (Elf32_Dyn *) (ppnt->p_vaddr + app_tpnt->loadaddr);
- while (dpnt->d_tag) {
-#if defined(__mips__)
- if (dpnt->d_tag == DT_MIPS_GOTSYM)
- app_tpnt->mips_gotsym =
- (unsigned long) dpnt->d_un.d_val;
- if (dpnt->d_tag == DT_MIPS_LOCAL_GOTNO)
- app_tpnt->mips_local_gotno =
- (unsigned long) dpnt->d_un.d_val;
- if (dpnt->d_tag == DT_MIPS_SYMTABNO)
- app_tpnt->mips_symtabno =
- (unsigned long) dpnt->d_un.d_val;
- if (dpnt->d_tag > DT_JMPREL) {
- dpnt++;
- continue;
- }
- app_tpnt->dynamic_info[dpnt->d_tag] = dpnt->d_un.d_val;
-
- if (dpnt->d_tag == DT_DEBUG) {
- /* Allow writing debug_addr into the .dynamic segment.
- * Even though the program header is marked RWE, the kernel gives
- * it to us rx.
- */
- Elf32_Addr mpa = (ppnt->p_vaddr + app_tpnt->loadaddr) & ~(pagesize - 1);
- Elf32_Word mps = ((ppnt->p_vaddr + app_tpnt->loadaddr) - mpa) + ppnt->p_memsz;
- if(_dl_mprotect(mpa, mps, PROT_READ | PROT_WRITE | PROT_EXEC)) {
- SEND_STDERR("Couldn't mprotect .dynamic segment to rwx.\n");
- _dl_exit(0);
- }
- dpnt->d_un.d_val = (unsigned long) debug_addr;
- }
-#else
- if (dpnt->d_tag > DT_JMPREL) {
- dpnt++;
- continue;
- }
- app_tpnt->dynamic_info[dpnt->d_tag] = dpnt->d_un.d_val;
- if (dpnt->d_tag == DT_DEBUG) {
- dpnt->d_un.d_val = (unsigned long) debug_addr;
- }
-#endif
- if (dpnt->d_tag == DT_TEXTREL)
- app_tpnt->dynamic_info[DT_TEXTREL] = 1;
- dpnt++;
- }
-#ifndef FORCE_SHAREABLE_TEXT_SEGMENTS
- /* Ugly, ugly. We need to call mprotect to change the protection of
- the text pages so that we can do the dynamic linking. We can set the
- protection back again once we are done */
+ _dl_parse_dynamic_info(dpnt, app_tpnt->dynamic_info, debug_addr);
+#ifndef __FORCE_SHAREABLE_TEXT_SEGMENTS__
+ /* Ugly, ugly. We need to call mprotect to change the
+ * protection of the text pages so that we can do the
+ * dynamic linking. We can set the protection back
+ * again once we are done.
+ */
#ifdef __SUPPORT_LD_DEBUG_EARLY__
SEND_STDERR("calling mprotect on the application program\n");
#endif
if (ppnt->p_type == PT_INTERP) {
int readsize = 0;
char *pnt, *pnt1, buf[1024];
+
tpnt->libname = _dl_strdup((char *) ppnt->p_offset +
(auxvt[AT_PHDR].a_un.a_val & PAGE_ALIGN));
pnt1 = _dl_strrchr(buf, '/');
if (pnt1 && buf != pnt1) {
#ifdef __SUPPORT_LD_DEBUG_EARLY__
- _dl_dprintf(_dl_debug_file, "changing tpnt->libname from '%s' to '%s'\n", tpnt->libname, buf);
+ _dl_dprintf(_dl_debug_file,
+ "changing tpnt->libname from '%s' to '%s'\n",
+ tpnt->libname, buf);
#endif
tpnt->libname = _dl_strdup(buf);
}
}
- /* Store the path where the shared lib loader was found for
- * later use */
+ /* Store the path where the shared lib loader was found
+ * for later use
+ */
pnt = _dl_strdup(tpnt->libname);
pnt1 = _dl_strrchr(pnt, '/');
if (pnt != pnt1) {
_dl_ldsopath = tpnt->libname;
}
#ifdef __SUPPORT_LD_DEBUG_EARLY__
- _dl_dprintf(_dl_debug_file, "Lib Loader:\t(%x) %s\n", tpnt->loadaddr, tpnt->libname);
+ _dl_dprintf(_dl_debug_file, "Lib Loader:\t(%x) %s\n",
+ tpnt->loadaddr, tpnt->libname);
#endif
}
}
+ app_tpnt->relro_addr = relro_addr;
+ app_tpnt->relro_size = relro_size;
/* Now we need to figure out what kind of options are selected.
- Note that for SUID programs we ignore the settings in LD_LIBRARY_PATH */
- {
- if ((auxvt[AT_UID].a_un.a_val == -1 && _dl_suid_ok()) ||
- (auxvt[AT_UID].a_un.a_val != -1 &&
- auxvt[AT_UID].a_un.a_val == auxvt[AT_EUID].a_un.a_val
- && auxvt[AT_GID].a_un.a_val== auxvt[AT_EGID].a_un.a_val)) {
- _dl_secure = 0;
- _dl_preload = _dl_getenv("LD_PRELOAD", envp);
- _dl_library_path = _dl_getenv("LD_LIBRARY_PATH", envp);
- } else {
- _dl_secure = 1;
- _dl_preload = _dl_getenv("LD_PRELOAD", envp);
- _dl_unsetenv("LD_AOUT_PRELOAD", envp);
- _dl_unsetenv("LD_LIBRARY_PATH", envp);
- _dl_unsetenv("LD_AOUT_LIBRARY_PATH", envp);
- _dl_library_path = NULL;
- }
+ * Note that for SUID programs we ignore the settings in
+ * LD_LIBRARY_PATH.
+ */
+ if ((auxvt[AT_UID].a_un.a_val == -1 && _dl_suid_ok()) ||
+ (auxvt[AT_UID].a_un.a_val != -1 &&
+ auxvt[AT_UID].a_un.a_val == auxvt[AT_EUID].a_un.a_val &&
+ auxvt[AT_GID].a_un.a_val == auxvt[AT_EGID].a_un.a_val)) {
+ _dl_secure = 0;
+ _dl_preload = _dl_getenv("LD_PRELOAD", envp);
+ _dl_library_path = _dl_getenv("LD_LIBRARY_PATH", envp);
+ } else {
+ static const char unsecure_envvars[] =
+#ifdef EXTRA_UNSECURE_ENVVARS
+ EXTRA_UNSECURE_ENVVARS
+#endif
+ UNSECURE_ENVVARS;
+ const char *nextp;
+ _dl_secure = 1;
+
+ nextp = unsecure_envvars;
+ do {
+ _dl_unsetenv (nextp, envp);
+ /* We could use rawmemchr but this need not be fast. */
+ nextp = (char *) _dl_strchr(nextp, '\0') + 1;
+ } while (*nextp != '\0');
+ _dl_preload = NULL;
+ _dl_library_path = NULL;
}
#ifdef __SUPPORT_LD_DEBUG__
- _dl_debug = _dl_getenv("LD_DEBUG", envp);
- if (_dl_debug)
- {
+ _dl_debug = _dl_getenv("LD_DEBUG", envp);
+ if (_dl_debug) {
if (_dl_strstr(_dl_debug, "all")) {
_dl_debug_detail = _dl_debug_move = _dl_debug_symbols
- = _dl_debug_reloc = _dl_debug_bindings = _dl_debug_nofixups = _dl_strstr(_dl_debug, "all");
- }
- else {
+ = _dl_debug_reloc = _dl_debug_bindings = _dl_debug_nofixups = (void*)1;
+ } else {
_dl_debug_detail = _dl_strstr(_dl_debug, "detail");
_dl_debug_move = _dl_strstr(_dl_debug, "move");
_dl_debug_symbols = _dl_strstr(_dl_debug, "sym");
_dl_debug_bindings = _dl_strstr(_dl_debug, "bind");
}
}
+
{
const char *dl_debug_output;
dl_debug_output = _dl_getenv("LD_DEBUG_OUTPUT", envp);
- if (dl_debug_output)
- {
+ if (dl_debug_output) {
char tmp[22], *tmp1, *filename;
int len1, len2;
_dl_memset(tmp, 0, sizeof(tmp));
- tmp1=_dl_simple_ltoa( tmp, (unsigned long)_dl_getpid());
+ tmp1 = _dl_simple_ltoa( tmp, (unsigned long)_dl_getpid());
len1 = _dl_strlen(dl_debug_output);
len2 = _dl_strlen(tmp1);
filename = _dl_malloc(len1+len2+2);
- if (filename)
- {
+ if (filename) {
_dl_strcpy (filename, dl_debug_output);
filename[len1] = '.';
_dl_strcpy (&filename[len1+1], tmp1);
_dl_debug_file= _dl_open(filename, O_WRONLY|O_CREAT, 0644);
- if (_dl_debug_file<0)
- {
+ if (_dl_debug_file < 0) {
_dl_debug_file = 2;
_dl_dprintf (2, "can't open file: '%s'\n",filename);
}
}
}
}
-
-
#endif
+
if (_dl_getenv("LD_TRACE_LOADED_OBJECTS", envp) != NULL) {
trace_loaded_objects++;
}
+
#ifndef __LDSO_LDD_SUPPORT__
if (trace_loaded_objects) {
_dl_dprintf(_dl_debug_file, "Use the ldd provided by uClibc\n");
_dl_debug_state();
/* OK, we now have the application in the list, and we have some
- basic stuff in place. Now search through the list for other shared
- libraries that should be loaded, and insert them on the list in the
- correct order. */
+ * basic stuff in place. Now search through the list for other shared
+ * libraries that should be loaded, and insert them on the list in the
+ * correct order.
+ */
_dl_map_cache();
-
- if (_dl_preload)
- {
+ if (_dl_preload) {
char c, *str, *str2;
str = _dl_preload;
while (*str == ':' || *str == ' ' || *str == '\t')
str++;
- while (*str)
- {
+
+ while (*str) {
str2 = str;
while (*str2 && *str2 != ':' && *str2 != ' ' && *str2 != '\t')
str2++;
c = *str2;
*str2 = '\0';
- if (!_dl_secure || _dl_strchr(str, '/') == NULL)
- {
- if ((tpnt1 = _dl_check_if_named_library_is_loaded(str, trace_loaded_objects)))
- {
+
+ if (!_dl_secure || _dl_strchr(str, '/') == NULL) {
+ if ((tpnt1 = _dl_check_if_named_library_is_loaded(str, trace_loaded_objects))) {
tpnt1->usage_count++;
- continue;
+ goto next_lib;
}
+
#if defined (__SUPPORT_LD_DEBUG__)
- if(_dl_debug) _dl_dprintf(_dl_debug_file, "\tfile='%s'; needed by '%s'\n",
- str, _dl_progname);
+ if(_dl_debug)
+ _dl_dprintf(_dl_debug_file,
+ "\tfile='%s'; needed by '%s'\n",
+ str, _dl_progname);
#endif
+
tpnt1 = _dl_load_shared_library(_dl_secure, &rpnt, NULL, str, trace_loaded_objects);
if (!tpnt1) {
#ifdef __LDSO_LDD_SUPPORT__
}
} else {
tpnt1->rtld_flags = unlazy | RTLD_GLOBAL;
+
#ifdef __SUPPORT_LD_DEBUG_EARLY__
- _dl_dprintf(_dl_debug_file, "Loading:\t(%x) %s\n", tpnt1->loadaddr, tpnt1->libname);
+ _dl_dprintf(_dl_debug_file,
+ "Loading:\t(%x) %s\n",
+ tpnt1->loadaddr,
+ tpnt1->libname);
#endif
+
#ifdef __LDSO_LDD_SUPPORT__
- if (trace_loaded_objects && tpnt1->usage_count==1) {
- /* this is a real hack to make ldd not print
- * the library itself when run on a library. */
+ if (trace_loaded_objects &&
+ tpnt1->usage_count == 1) {
+ /* This is a real hack to make
+ * ldd not print the library
+ * itself when run on a
+ * library.
+ */
if (_dl_strcmp(_dl_progname, str) != 0)
_dl_dprintf(1, "\t%s => %s (%x)\n", str, tpnt1->libname,
- (unsigned) tpnt1->loadaddr);
+ (unsigned)tpnt1->loadaddr);
}
#endif
}
}
+
+next_lib:
*str2 = c;
str = str2;
while (*str == ':' || *str == ' ' || *str == '\t')
}
}
-#ifdef SUPPORT_LDSO_PRELOAD_FILE
- {
- int fd;
+#ifdef __LDSO_PRELOAD_FILE_SUPPORT__
+ do {
struct stat st;
char *preload;
- if (!_dl_stat(LDSO_PRELOAD, &st) && st.st_size > 0) {
- if ((fd = _dl_open(LDSO_PRELOAD, O_RDONLY, 0)) < 0) {
- _dl_dprintf(2, "%s: can't open file '%s'\n",
- _dl_progname, LDSO_PRELOAD);
+ int fd;
+ char c, *cp, *cp2;
+
+ if (_dl_stat(LDSO_PRELOAD, &st) || st.st_size == 0) {
+ break;
+ }
+
+ if ((fd = _dl_open(LDSO_PRELOAD, O_RDONLY, 0)) < 0) {
+ _dl_dprintf(2, "%s: can't open file '%s'\n",
+ _dl_progname, LDSO_PRELOAD);
+ break;
+ }
+
+ preload = (caddr_t) _dl_mmap(0, st.st_size + 1,
+ PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0);
+ _dl_close(fd);
+ if (preload == (caddr_t) -1) {
+ _dl_dprintf(2, "%s: can't map file '%s'\n",
+ _dl_progname, LDSO_PRELOAD);
+ break;
+ }
+
+ /* convert all separators and comments to spaces */
+ for (cp = preload; *cp; /*nada */ ) {
+ if (*cp == ':' || *cp == '\t' || *cp == '\n') {
+ *cp++ = ' ';
+ } else if (*cp == '#') {
+ do {
+ *cp++ = ' ';
+ } while (*cp != '\n' && *cp != '\0');
} else {
- preload = (caddr_t) _dl_mmap(0, st.st_size + 1,
- PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0);
- _dl_close(fd);
- if (preload == (caddr_t) - 1) {
- _dl_dprintf(2, "%s: can't map file '%s'\n",
- _dl_progname, LDSO_PRELOAD);
- } else {
- char c, *cp, *cp2;
-
- /* convert all separators and comments to spaces */
- for (cp = preload; *cp; /*nada */ ) {
- if (*cp == ':' || *cp == '\t' || *cp == '\n') {
- *cp++ = ' ';
- } else if (*cp == '#') {
- do
- *cp++ = ' ';
- while (*cp != '\n' && *cp != '\0');
- } else {
- cp++;
- }
- }
+ cp++;
+ }
+ }
- /* find start of first library */
- for (cp = preload; *cp && *cp == ' '; cp++)
- /*nada */ ;
+ /* find start of first library */
+ for (cp = preload; *cp && *cp == ' '; cp++)
+ /*nada */ ;
- while (*cp) {
- /* find end of library */
- for (cp2 = cp; *cp && *cp != ' '; cp++)
- /*nada */ ;
- c = *cp;
- *cp = '\0';
+ while (*cp) {
+ /* find end of library */
+ for (cp2 = cp; *cp && *cp != ' '; cp++)
+ /*nada */ ;
+ c = *cp;
+ *cp = '\0';
+
+ if ((tpnt1 = _dl_check_if_named_library_is_loaded(cp2, trace_loaded_objects))) {
+ tpnt1->usage_count++;
+ goto next_lib2;
+ }
- if ((tpnt1 = _dl_check_if_named_library_is_loaded(cp2, trace_loaded_objects)))
- {
- tpnt1->usage_count++;
- continue;
- }
#if defined (__SUPPORT_LD_DEBUG__)
- if(_dl_debug) _dl_dprintf(_dl_debug_file, "\tfile='%s'; needed by '%s'\n",
- cp2, _dl_progname);
-#endif
- tpnt1 = _dl_load_shared_library(0, &rpnt, NULL, cp2, trace_loaded_objects);
- if (!tpnt1) {
-#ifdef __LDSO_LDD_SUPPORT__
- if (trace_loaded_objects)
- _dl_dprintf(1, "\t%s => not found\n", cp2);
- else
-#endif
- {
- _dl_dprintf(2, "%s: can't load library '%s'\n", _dl_progname, cp2);
- _dl_exit(15);
- }
- } else {
- tpnt1->rtld_flags = unlazy | RTLD_GLOBAL;
-#ifdef __SUPPORT_LD_DEBUG_EARLY__
- _dl_dprintf(_dl_debug_file, "Loading:\t(%x) %s\n", tpnt1->loadaddr, tpnt1->libname);
+ if(_dl_debug)
+ _dl_dprintf(_dl_debug_file,
+ "\tfile='%s'; needed by '%s'\n",
+ cp2, _dl_progname);
#endif
+
+ tpnt1 = _dl_load_shared_library(0, &rpnt, NULL, cp2, trace_loaded_objects);
+ if (!tpnt1) {
#ifdef __LDSO_LDD_SUPPORT__
- if (trace_loaded_objects && tpnt1->usage_count==1) {
- _dl_dprintf(1, "\t%s => %s (%x)\n", cp2,
- tpnt1->libname, (unsigned) tpnt1->loadaddr);
- }
+ if (trace_loaded_objects)
+ _dl_dprintf(1, "\t%s => not found\n", cp2);
+ else
#endif
- }
+ {
+ _dl_dprintf(2, "%s: can't load library '%s'\n", _dl_progname, cp2);
+ _dl_exit(15);
+ }
+ } else {
+ tpnt1->rtld_flags = unlazy | RTLD_GLOBAL;
- /* find start of next library */
- *cp = c;
- for ( /*nada */ ; *cp && *cp == ' '; cp++)
- /*nada */ ;
- }
+#ifdef __SUPPORT_LD_DEBUG_EARLY__
+ _dl_dprintf(_dl_debug_file,
+ "Loading:\t(%x) %s\n",
+ tpnt1->loadaddr, tpnt1->libname);
+#endif
- _dl_munmap(preload, st.st_size + 1);
+#ifdef __LDSO_LDD_SUPPORT__
+ if (trace_loaded_objects &&
+ tpnt1->usage_count == 1) {
+ _dl_dprintf(1, "\t%s => %s (%x)\n",
+ cp2, tpnt1->libname,
+ (unsigned)tpnt1->loadaddr);
}
+#endif
}
+
+next_lib2:
+ /* find start of next library */
+ *cp = c;
+ for ( /*nada */ ; *cp && *cp == ' '; cp++)
+ /*nada */ ;
}
- }
-#endif
- for (tcurr = _dl_loaded_modules; tcurr; tcurr = tcurr->next)
- {
+ _dl_munmap(preload, st.st_size + 1);
+ } while (0);
+#endif /* __LDSO_PRELOAD_FILE_SUPPORT__ */
+
+ nlist = 0;
+ for (tcurr = _dl_loaded_modules; tcurr; tcurr = tcurr->next) {
Elf32_Dyn *dpnt;
- for (dpnt = (Elf32_Dyn *) tcurr->dynamic_addr; dpnt->d_tag; dpnt++)
- {
- if (dpnt->d_tag == DT_NEEDED)
- {
+
+ nlist++;
+ for (dpnt = (Elf32_Dyn *) tcurr->dynamic_addr; dpnt->d_tag; dpnt++) {
+ if (dpnt->d_tag == DT_NEEDED) {
char *name;
+ struct init_fini_list *tmp;
+
lpntstr = (char*) (tcurr->loadaddr + tcurr->dynamic_info[DT_STRTAB] + dpnt->d_un.d_val);
name = _dl_get_last_path_component(lpntstr);
- if ((tpnt1 = _dl_check_if_named_library_is_loaded(name, trace_loaded_objects)))
- {
+ if ((tpnt1 = _dl_check_if_named_library_is_loaded(name, trace_loaded_objects))) {
tpnt1->usage_count++;
- continue;
}
+
#if defined (__SUPPORT_LD_DEBUG__)
- if(_dl_debug) _dl_dprintf(_dl_debug_file, "\tfile='%s'; needed by '%s'\n",
- lpntstr, _dl_progname);
+ if(_dl_debug)
+ _dl_dprintf(_dl_debug_file,
+ "\tfile='%s'; needed by '%s'\n",
+ lpntstr, _dl_progname);
#endif
- if (!(tpnt1 = _dl_load_shared_library(0, &rpnt, tcurr, lpntstr, trace_loaded_objects)))
- {
+
+ if (!tpnt1) {
+ if (!(tpnt1 = _dl_load_shared_library(0, &rpnt, tcurr, lpntstr, trace_loaded_objects))) {
#ifdef __LDSO_LDD_SUPPORT__
- if (trace_loaded_objects) {
- _dl_dprintf(1, "\t%s => not found\n", lpntstr);
- continue;
- } else
+ if (trace_loaded_objects) {
+ _dl_dprintf(1, "\t%s => not found\n", lpntstr);
+ continue;
+ } else
#endif
- {
- _dl_dprintf(2, "%s: can't load library '%s'\n", _dl_progname, lpntstr);
- _dl_exit(16);
+ {
+ _dl_dprintf(2, "%s: can't load library '%s'\n", _dl_progname, lpntstr);
+ _dl_exit(16);
+ }
}
- } else {
- tpnt1->rtld_flags = unlazy | RTLD_GLOBAL;
+ }
+
+ tmp = alloca(sizeof(struct init_fini_list)); /* Allocates on stack, no need to free this memory */
+ tmp->tpnt = tpnt1;
+ tmp->next = tcurr->init_fini;
+ tcurr->init_fini = tmp;
+
+ tpnt1->rtld_flags = unlazy | RTLD_GLOBAL;
+
#ifdef __SUPPORT_LD_DEBUG_EARLY__
- _dl_dprintf(_dl_debug_file, "Loading:\t(%x) %s\n", tpnt1->loadaddr, tpnt1->libname);
+ _dl_dprintf(_dl_debug_file,
+ "Loading:\t(%x) %s\n",
+ tpnt1->loadaddr, tpnt1->libname);
#endif
+
#ifdef __LDSO_LDD_SUPPORT__
- if (trace_loaded_objects && tpnt1->usage_count==1) {
- _dl_dprintf(1, "\t%s => %s (%x)\n", lpntstr, tpnt1->libname,
- (unsigned) tpnt1->loadaddr);
- }
-#endif
+ if (trace_loaded_objects &&
+ tpnt1->usage_count == 1) {
+ _dl_dprintf(1, "\t%s => %s (%x)\n",
+ lpntstr, tpnt1->libname,
+ (unsigned)tpnt1->loadaddr);
}
+#endif
}
}
}
+ _dl_unmap_cache();
+
+ --nlist; /* Exclude the application. */
+
+ /* As long as atexit() is used to run the FINI functions, we can use
+ * alloca here. The use of atexit() should go away at some time as that
+ * will make Valgring happy.
+ */
+ init_fini_list = alloca(nlist * sizeof(struct elf_resolve *));
+ i = 0;
+ for (tcurr = _dl_loaded_modules->next; tcurr; tcurr = tcurr->next) {
+ init_fini_list[i++] = tcurr;
+ }
+ /* Sort the INIT/FINI list in dependency order. */
+ for (tcurr = _dl_loaded_modules->next; tcurr; tcurr = tcurr->next) {
+ int j, k;
- _dl_unmap_cache();
+ for (j = 0; init_fini_list[j] != tcurr; ++j)
+ /* Empty */;
+ for (k = j + 1; k < nlist; ++k) {
+ struct init_fini_list *runp = init_fini_list[k]->init_fini;
+
+ for (; runp; runp = runp->next) {
+ if (runp->tpnt == tcurr) {
+ struct elf_resolve *here = init_fini_list[k];
+#ifdef __SUPPORT_LD_DEBUG__
+ if(_dl_debug)
+ _dl_dprintf(2, "Move %s from pos %d to %d in INIT/FINI list.\n", here->libname, k, j);
+#endif
+ for (i = (k - j); i; --i)
+ init_fini_list[i+j] = init_fini_list[i+j-1];
+ init_fini_list[j] = here;
+ ++j;
+ break;
+ }
+ }
+ }
+ }
+#ifdef __SUPPORT_LD_DEBUG__
+ if(_dl_debug) {
+ _dl_dprintf(2, "\nINIT/FINI order and dependencies:\n");
+ for (i = 0; i < nlist; i++) {
+ struct init_fini_list *tmp;
+
+ _dl_dprintf(2, "lib: %s has deps:\n",
+ init_fini_list[i]->libname);
+ tmp = init_fini_list[i]->init_fini;
+ for (; tmp; tmp = tmp->next)
+ _dl_dprintf(2, " %s ", tmp->tpnt->libname);
+ _dl_dprintf(2, "\n");
+ }
+ }
+#endif
/*
- * If the program interpreter is not in the module chain, add it. This will
- * be required for dlopen to be able to access the internal functions in the
- * dynamic linker and to relocate the interpreter again once all libs are loaded.
+ * If the program interpreter is not in the module chain, add it.
+ * This will be required for dlopen to be able to access the internal
+ * functions in the dynamic linker and to relocate the interpreter
+ * again once all libs are loaded.
*/
if (tpnt) {
- tpnt = _dl_add_elf_hash_table(tpnt->libname, (char *)load_addr, tpnt->dynamic_info,
- (unsigned long)tpnt->dynamic_addr, tpnt->dynamic_size);
+ ElfW(Ehdr) *epnt = (ElfW(Ehdr) *) auxvt[AT_BASE].a_un.a_ptr;
+ ElfW(Phdr) *myppnt = (ElfW(Phdr) *) (load_addr + epnt->e_phoff);
+ int j;
+
+ tpnt = _dl_add_elf_hash_table(tpnt->libname, (char *)load_addr,
+ tpnt->dynamic_info,
+ (unsigned long)tpnt->dynamic_addr,
+ 0);
+
+ tpnt->n_phent = epnt->e_phnum;
+ tpnt->ppnt = myppnt;
+ for (j = 0; j < epnt->e_phnum; j++, myppnt++) {
+ if (myppnt->p_type == PT_GNU_RELRO) {
+ tpnt->relro_addr = myppnt->p_vaddr;
+ tpnt->relro_size = myppnt->p_memsz;
+ break;
+ }
+ }
tpnt->libtype = program_interpreter;
tpnt->usage_count++;
tpnt->symbol_scope = _dl_symbol_tables;
tpnt->rtld_flags = RTLD_NOW | RTLD_GLOBAL; /* Must not be LAZY */
#ifdef RERELOCATE_LDSO
/* Only rerelocate functions for now. */
- tpnt->init_flag = RELOCS_DONE | COPY_RELOCS_DONE;
+ tpnt->init_flag = RELOCS_DONE;
lpnt = (unsigned long *) (tpnt->dynamic_info[DT_PLTGOT] + load_addr);
# ifdef ALLOW_ZERO_PLTGOT
if (tpnt->dynamic_info[DT_PLTGOT])
# endif
INIT_GOT(lpnt, tpnt);
#else
- tpnt->init_flag = RELOCS_DONE | JMP_RELOCS_DONE | COPY_RELOCS_DONE;
+ tpnt->init_flag = RELOCS_DONE | JMP_RELOCS_DONE;
#endif
tpnt = NULL;
}
#ifdef __LDSO_LDD_SUPPORT__
/* End of the line for ldd.... */
if (trace_loaded_objects) {
- _dl_dprintf(1, "\t%s => %s (%x)\n", rpnt->dyn->libname + (_dl_strlen(_dl_ldsopath)) + 1,
- rpnt->dyn->libname, rpnt->dyn->loadaddr);
+ _dl_dprintf(1, "\t%s => %s (%x)\n",
+ rpnt->dyn->libname + _dl_strlen(_dl_ldsopath) + 1,
+ rpnt->dyn->libname, rpnt->dyn->loadaddr);
_dl_exit(0);
}
#endif
+#ifdef __SUPPORT_LD_DEBUG_EARLY__
+ _dl_dprintf(_dl_debug_file, "Beginning relocation fixups\n");
+#endif
#ifdef __mips__
/*
_dl_perform_mips_global_got_relocations(_dl_loaded_modules);
#endif
-#ifdef __SUPPORT_LD_DEBUG_EARLY__
- _dl_dprintf(_dl_debug_file, "Beginning relocation fixups\n");
-#endif
/*
- * OK, now all of the kids are tucked into bed in their proper addresses.
- * Now we go through and look for REL and RELA records that indicate fixups
- * to the GOT tables. We need to do this in reverse order so that COPY
- * directives work correctly */
+ * OK, now all of the kids are tucked into bed in their proper
+ * addresses. Now we go through and look for REL and RELA records that
+ * indicate fixups to the GOT tables. We need to do this in reverse
+ * order so that COPY directives work correctly.
+ */
if (_dl_symbol_tables)
goof += _dl_fixup(_dl_symbol_tables, unlazy);
+ for (tpnt = _dl_loaded_modules; tpnt; tpnt = tpnt->next) {
+ if (tpnt->relro_size)
+ _dl_protect_relro (tpnt);
+ }
+
- /* OK, at this point things are pretty much ready to run. Now we
- need to touch up a few items that are required, and then
- we can let the user application have at it. Note that
- the dynamic linker itself is not guaranteed to be fully
- dynamicly linked if we are using ld.so.1, so we have to look
- up each symbol individually. */
-#ifndef FORCE_SHAREABLE_TEXT_SEGMENTS
+
+ /* OK, at this point things are pretty much ready to run. Now we need
+ * to touch up a few items that are required, and then we can let the
+ * user application have at it. Note that the dynamic linker itself
+ * is not guaranteed to be fully dynamicly linked if we are using
+ * ld.so.1, so we have to look up each symbol individually.
+ */
+
+ _dl_envp = (unsigned long *) (intptr_t) _dl_find_hash("__environ", _dl_symbol_tables, NULL, 0);
+ if (_dl_envp)
+ *_dl_envp = (unsigned long) envp;
+
+#ifndef __FORCE_SHAREABLE_TEXT_SEGMENTS__
{
unsigned int j;
ElfW(Phdr) *myppnt;
- /* We had to set the protections of all pages to R/W for dynamic linking.
- Set text pages back to R/O */
+ /* We had to set the protections of all pages to R/W for
+ * dynamic linking. Set text pages back to R/O.
+ */
for (tpnt = _dl_loaded_modules; tpnt; tpnt = tpnt->next) {
for (myppnt = tpnt->ppnt, j = 0; j < tpnt->n_phent; j++, myppnt++) {
if (myppnt->p_type == PT_LOAD && !(myppnt->p_flags & PF_W) && tpnt->dynamic_info[DT_TEXTREL]) {
}
#endif
- _dl_atexit = (int (*)(void *)) (intptr_t) _dl_find_hash("atexit", _dl_symbol_tables, ELF_RTYPE_CLASS_PLT);
+
+ _dl_atexit = (int (*)(void *)) (intptr_t) _dl_find_hash("atexit", _dl_symbol_tables, NULL, ELF_RTYPE_CLASS_PLT);
#if defined (__SUPPORT_LD_DEBUG__)
_dl_on_exit = (int (*)(void (*)(int, void *),void*))
- (intptr_t) _dl_find_hash("on_exit", _dl_symbol_tables, ELF_RTYPE_CLASS_PLT);
+ (intptr_t) _dl_find_hash("on_exit", _dl_symbol_tables, NULL, ELF_RTYPE_CLASS_PLT);
#endif
/* Notify the debugger we have added some objects. */
_dl_debug_addr->r_state = RT_ADD;
_dl_debug_state();
-
- for (rpnt = _dl_symbol_tables; rpnt!=NULL&& rpnt->next!=NULL; rpnt=rpnt->next)
- ;
-
- for (;rpnt!=NULL; rpnt=rpnt->prev)
- {
- tpnt = rpnt->dyn;
-
- if (tpnt->libtype == program_interpreter)
- continue;
-
- /* Apparently crt0/1 for the application is responsible for handling this.
- * We only need to run the init/fini for shared libraries
- */
- if (tpnt->libtype == elf_executable)
- break; /* at this point all shared libs are initialized !! */
-
+ for (i = nlist; i; --i) {
+ tpnt = init_fini_list[i-1];
+ tpnt->init_fini = NULL; /* Clear, since alloca was used */
if (tpnt->init_flag & INIT_FUNCS_CALLED)
continue;
tpnt->init_flag |= INIT_FUNCS_CALLED;
if (tpnt->dynamic_info[DT_INIT]) {
void (*dl_elf_func) (void);
+
dl_elf_func = (void (*)(void)) (intptr_t) (tpnt->loadaddr + tpnt->dynamic_info[DT_INIT]);
+
#if defined (__SUPPORT_LD_DEBUG__)
- if(_dl_debug) _dl_dprintf(_dl_debug_file,"\ncalling init: %s\n\n", tpnt->libname);
+ if(_dl_debug)
+ _dl_dprintf(_dl_debug_file,
+ "\ncalling init: %s\n\n",
+ tpnt->libname);
#endif
+
(*dl_elf_func) ();
}
+ tpnt->init_flag |= FINI_FUNCS_CALLED;
if (_dl_atexit && tpnt->dynamic_info[DT_FINI]) {
void (*dl_elf_func) (void);
+
dl_elf_func = (void (*)(void)) (intptr_t) (tpnt->loadaddr + tpnt->dynamic_info[DT_FINI]);
(*_dl_atexit) (dl_elf_func);
#if defined (__SUPPORT_LD_DEBUG__)
- if(_dl_debug && _dl_on_exit)
- {
+ if(_dl_debug && _dl_on_exit) {
(*_dl_on_exit)(debug_fini, tpnt->libname);
}
#endif
else {
if (!_dl_atexit)
_dl_dprintf(_dl_debug_file, "%s: The address of atexit () is 0x0.\n", tpnt->libname);
-#if 0
- if (!tpnt->dynamic_info[DT_FINI])
- _dl_dprintf(_dl_debug_file, "%s: Invalid .fini section.\n", tpnt->libname);
-#endif
}
#endif
}
/* Notify the debugger that all objects are now mapped in. */
_dl_debug_addr->r_state = RT_CONSISTENT;
_dl_debug_state();
+
+ /* Find the real malloc function and make ldso functions use that from now on */
+ _dl_malloc_function = (void* (*)(size_t)) (intptr_t) _dl_find_hash("malloc", _dl_symbol_tables, NULL, ELF_RTYPE_CLASS_PLT);
}
char *_dl_getenv(const char *symbol, char **envp)
return 0;
}
-void *(*_dl_malloc_function) (size_t size) = NULL;
void *_dl_malloc(int size)
{
void *retval;
if (_dl_malloc_function)
return (*_dl_malloc_function) (size);
- if (_dl_malloc_addr - _dl_mmap_zero + size > _dl_pagesize) {
+ if (_dl_malloc_addr - _dl_mmap_zero + (unsigned)size > _dl_pagesize) {
#ifdef __SUPPORT_LD_DEBUG_EARLY__
_dl_dprintf(2, "malloc: mmapping more memory\n");
#endif
_dl_malloc_addr += size;
/*
- * Align memory to 4 byte boundary. Some platforms require this, others
- * simply get better performance.
+ * Align memory to 4 byte boundary. Some platforms require this,
+ * others simply get better performance.
*/
_dl_malloc_addr = (unsigned char *) (((unsigned long) _dl_malloc_addr + 3) & ~(3));
return retval;
}
-
#include "dl-hash.c"
#include "dl-elf.c"
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