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Diffstat (limited to 'ldso')
-rw-r--r--ldso/ldso/ldso.c462
1 files changed, 263 insertions, 199 deletions
diff --git a/ldso/ldso/ldso.c b/ldso/ldso/ldso.c
index bf9cd0213..52260be78 100644
--- a/ldso/ldso/ldso.c
+++ b/ldso/ldso/ldso.c
@@ -29,7 +29,6 @@
* SUCH DAMAGE.
*/
-
#include "ldso.h"
#define ALLOW_ZERO_PLTGOT
@@ -38,16 +37,15 @@
#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;
char *_dl_debug_symbols = 0;
@@ -72,10 +70,8 @@ void _dl_debug_state(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)
@@ -86,7 +82,8 @@ 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, char **argv)
+ Elf32_auxv_t auxvt[AT_EGID + 1], char **envp,
+ char **argv)
{
ElfW(Phdr) *ppnt;
Elf32_Dyn *dpnt;
@@ -112,18 +109,19 @@ void _dl_get_ready_to_run(struct elf_resolve *tpnt, unsigned long load_addr,
#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;
+ _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().... */
+ * 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];
}
@@ -131,7 +129,8 @@ void _dl_get_ready_to_run(struct elf_resolve *tpnt, unsigned long load_addr,
/* 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. */
+ * will need to properly deal with that as well.
+ */
{
ElfW(Ehdr) *epnt;
ElfW(Phdr) *myppnt;
@@ -154,15 +153,18 @@ void _dl_get_ready_to_run(struct elf_resolve *tpnt, unsigned long load_addr,
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);
@@ -176,8 +178,10 @@ void _dl_get_ready_to_run(struct elf_resolve *tpnt, unsigned long load_addr,
}
#endif
}
+
/*
- * This is used by gdb to locate the chain of shared libraries that are currently loaded.
+ * 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));
@@ -206,15 +210,16 @@ void _dl_get_ready_to_run(struct elf_resolve *tpnt, unsigned long load_addr,
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.
+ /* 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) & ~(_dl_pagesize - 1);
Elf32_Word mps = ((ppnt->p_vaddr + app_tpnt->loadaddr) - mpa) + ppnt->p_memsz;
- if(_dl_mprotect((void *)mpa, mps, PROT_READ | PROT_WRITE | PROT_EXEC)) {
+ if (_dl_mprotect((void *)mpa, mps, PROT_READ | PROT_WRITE | PROT_EXEC)) {
SEND_STDERR("Couldn't mprotect .dynamic segment to rwx.\n");
_dl_exit(0);
}
@@ -235,9 +240,11 @@ void _dl_get_ready_to_run(struct elf_resolve *tpnt, unsigned long load_addr,
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 */
+ /* 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
@@ -282,6 +289,7 @@ void _dl_get_ready_to_run(struct elf_resolve *tpnt, unsigned long load_addr,
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));
@@ -292,14 +300,17 @@ void _dl_get_ready_to_run(struct elf_resolve *tpnt, unsigned long load_addr,
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) {
@@ -309,40 +320,39 @@ void _dl_get_ready_to_run(struct elf_resolve *tpnt, unsigned long load_addr,
_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
}
}
/* 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 {
+ _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;
}
#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");
@@ -351,45 +361,43 @@ void _dl_get_ready_to_run(struct elf_resolve *tpnt, unsigned long load_addr,
_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");
@@ -413,38 +421,40 @@ void _dl_get_ready_to_run(struct elf_resolve *tpnt, unsigned long load_addr,
_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__
@@ -458,20 +468,31 @@ void _dl_get_ready_to_run(struct elf_resolve *tpnt, unsigned long load_addr,
}
} 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')
@@ -479,94 +500,109 @@ void _dl_get_ready_to_run(struct elf_resolve *tpnt, unsigned long load_addr,
}
}
-#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
+
+ _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;
@@ -583,9 +619,14 @@ void _dl_get_ready_to_run(struct elf_resolve *tpnt, unsigned long load_addr,
if ((tpnt1 = _dl_check_if_named_library_is_loaded(name, trace_loaded_objects))) {
tpnt1->usage_count++;
}
+
#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) {
if (!(tpnt1 = _dl_load_shared_library(0, &rpnt, tcurr, lpntstr, trace_loaded_objects))) {
#ifdef __LDSO_LDD_SUPPORT__
@@ -600,18 +641,26 @@ void _dl_get_ready_to_run(struct elf_resolve *tpnt, unsigned long load_addr,
}
}
}
+
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);
+ if (trace_loaded_objects &&
+ tpnt1->usage_count == 1) {
+ _dl_dprintf(1, "\t%s => %s (%x)\n",
+ lpntstr, tpnt1->libname,
+ (unsigned)tpnt1->loadaddr);
}
#endif
}
@@ -621,14 +670,16 @@ void _dl_get_ready_to_run(struct elf_resolve *tpnt, unsigned long load_addr,
--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. */
+ /* 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;
@@ -657,12 +708,13 @@ void _dl_get_ready_to_run(struct elf_resolve *tpnt, unsigned long load_addr,
#ifdef __SUPPORT_LD_DEBUG__
if(_dl_debug) {
_dl_dprintf(2, "\nINIT/FINI order and dependencies:\n");
- for (i=0;i < nlist;i++) {
+ for (i = 0; i < nlist; i++) {
struct init_fini_list *tmp;
- _dl_dprintf(2, "lib: %s has deps:\n", init_fini_list[i]->libname);
+ _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)
+ for (; tmp; tmp = tmp->next)
_dl_dprintf(2, " %s ", tmp->tpnt->libname);
_dl_dprintf(2, "\n");
}
@@ -670,13 +722,16 @@ void _dl_get_ready_to_run(struct elf_resolve *tpnt, unsigned long load_addr,
#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);
+ tpnt = _dl_add_elf_hash_table(tpnt->libname, (char *)load_addr,
+ tpnt->dynamic_info,
+ (unsigned long)tpnt->dynamic_addr,
+ tpnt->dynamic_size);
tpnt->libtype = program_interpreter;
tpnt->usage_count++;
tpnt->symbol_scope = _dl_symbol_tables;
@@ -708,13 +763,13 @@ void _dl_get_ready_to_run(struct elf_resolve *tpnt, unsigned long load_addr,
#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
@@ -722,25 +777,27 @@ void _dl_get_ready_to_run(struct elf_resolve *tpnt, unsigned long load_addr,
#ifdef __mips__
/*
* Relocation of the GOT entries for MIPS have to be done
- * after all the libraries have been loaded. */
+ * after all the libraries have been loaded.
+ */
_dl_perform_mips_global_got_relocations(_dl_loaded_modules);
#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);
- /* 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. */
+ /* 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, 0);
if (_dl_envp)
@@ -751,8 +808,9 @@ void _dl_get_ready_to_run(struct elf_resolve *tpnt, unsigned long load_addr,
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]) {
@@ -764,6 +822,7 @@ void _dl_get_ready_to_run(struct elf_resolve *tpnt, unsigned long load_addr,
}
#endif
+
_dl_atexit = (int (*)(void *)) (intptr_t) _dl_find_hash("atexit", _dl_symbol_tables, ELF_RTYPE_CLASS_PLT);
#if defined (__SUPPORT_LD_DEBUG__)
_dl_on_exit = (int (*)(void (*)(int, void *),void*))
@@ -782,20 +841,26 @@ void _dl_get_ready_to_run(struct elf_resolve *tpnt, unsigned long load_addr,
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
@@ -893,13 +958,12 @@ void *_dl_malloc(int size)
_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"