* Program to load an ELF binary on a linux system, and run it
* after resolving ELF shared library symbols
*
- * Copyright (C) 2000-2004 by Erik Andersen <andersen@codpoet.org>
+ * Copyright (C) 2005 by Joakim Tjernlund
+ * Copyright (C) 2000-2004 by Erik Andersen <andersen@codepoet.org>
* Copyright (c) 1994-2000 Eric Youngdale, Peter MacDonald,
* David Engel, Hongjiu Lu and Mitch D'Souza
*
* SUCH DAMAGE.
*/
-
#include "ldso.h"
+#include "unsecvars.h"
+
+/* Pull in common debug code */
+#include "dl-debug.c"
#define ALLOW_ZERO_PLTGOT
/* Pull in the value of _dl_progname */
-#include "_dl_progname.h"
+#include LDSO_ELFINTERP
/* 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 */
-unsigned char *_dl_malloc_addr = 0; /* Lets _dl_malloc use the already allocated memory page */
-unsigned char *_dl_mmap_zero = 0; /* Also used by _dl_malloc */
-unsigned long *_dl_brkp = 0; /* The end of the data segment for brk and sbrk */
-unsigned long *_dl_envp = 0; /* The environment address */
-int _dl_secure = 1; /* Are we dealing with setuid stuff? */
-
-
+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
+/* Needed for standalone execution. */
+unsigned long attribute_hidden _dl_skip_args = 0;
+const char *_dl_progname = UCLIBC_LDSO; /* The name of the executable being run */
+#include "dl-startup.c"
/* Forward function declarations */
-static void debug_fini (int status, void *arg);
static int _dl_suid_ok(void);
/*
* can set an internal breakpoint on it, so that we are notified when the
* address mapping is changed in some way.
*/
-void _dl_debug_state(void)
+void _dl_debug_state(void);
+void _dl_debug_state()
{
}
-/* This global variable is also to communicate with debuggers such as gdb. */
-struct r_debug *_dl_debug_addr = NULL;
+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 struct elf_resolve **init_fini_list;
+static unsigned int nlist; /* # items in init_fini_list */
+extern void _start(void);
+#ifdef __UCLIBC_HAS_SSP__
+#include <dl-osinfo.h>
+uintptr_t stack_chk_guard;
+#ifndef THREAD_SET_STACK_GUARD
+/* Only exported for architectures that don't store the stack guard canary
+ * in local thread area. */
+uintptr_t __stack_chk_guard attribute_relro;
+strong_alias(__stack_chk_guard,__guard)
+#endif
+#endif
+
+static void _dl_run_array_forward(unsigned long array, unsigned long size,
+ ElfW(Addr) loadaddr)
+{
+ if (array != 0) {
+ unsigned int j;
+ unsigned int jm;
+ ElfW(Addr) *addrs;
+ jm = size / sizeof (ElfW(Addr));
+ addrs = (ElfW(Addr) *) (array + loadaddr);
+ for (j = 0; j < jm; ++j) {
+ void (*dl_elf_func) (void);
+ dl_elf_func = (void (*)(void)) (intptr_t) addrs[j];
+ (*dl_elf_func) ();
+ }
+ }
+}
-#if defined (__SUPPORT_LD_DEBUG__)
-static void debug_fini (int status, void *arg)
+void _dl_run_init_array(struct elf_resolve *tpnt);
+void _dl_run_init_array(struct elf_resolve *tpnt)
{
- (void)status;
- _dl_dprintf(_dl_debug_file,"\ncalling fini: %s\n\n", (const char*)arg);
+ _dl_run_array_forward(tpnt->dynamic_info[DT_INIT_ARRAY],
+ tpnt->dynamic_info[DT_INIT_ARRAYSZ],
+ tpnt->loadaddr);
}
-#endif
-void _dl_get_ready_to_run(struct elf_resolve *tpnt, struct elf_resolve *app_tpnt,
- unsigned long load_addr, unsigned long *hash_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)
+void _dl_app_init_array(void);
+void _dl_app_init_array(void)
+{
+ _dl_run_init_array(_dl_loaded_modules);
+}
+
+void _dl_run_fini_array(struct elf_resolve *tpnt);
+void _dl_run_fini_array(struct elf_resolve *tpnt)
+{
+ if (tpnt->dynamic_info[DT_FINI_ARRAY]) {
+ ElfW(Addr) *array = (ElfW(Addr) *) (tpnt->loadaddr + tpnt->dynamic_info[DT_FINI_ARRAY]);
+ unsigned int i = (tpnt->dynamic_info[DT_FINI_ARRAYSZ] / sizeof(ElfW(Addr)));
+ while (i-- > 0) {
+ void (*dl_elf_func) (void);
+ dl_elf_func = (void (*)(void)) (intptr_t) array[i];
+ (*dl_elf_func) ();
+ }
+ }
+}
+
+void _dl_app_fini_array(void);
+void _dl_app_fini_array(void)
+{
+ _dl_run_fini_array(_dl_loaded_modules);
+}
+
+static void __attribute__ ((destructor)) __attribute_used__ _dl_fini(void)
+{
+ int i;
+ struct elf_resolve * tpnt;
+
+ for (i = 0; i < nlist; ++i) {
+ tpnt = init_fini_list[i];
+ if (tpnt->init_flag & FINI_FUNCS_CALLED)
+ continue;
+ tpnt->init_flag |= FINI_FUNCS_CALLED;
+ _dl_run_fini_array(tpnt);
+ if (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_if_debug_dprint("\ncalling FINI: %s\n\n", tpnt->libname);
+ (*dl_elf_func) ();
+ }
+ }
+}
+
+void _dl_get_ready_to_run(struct elf_resolve *tpnt, unsigned long load_addr,
+ ElfW(auxv_t) auxvt[AT_EGID + 1], char **envp,
+ char **argv)
{
ElfW(Phdr) *ppnt;
+ ElfW(Dyn) *dpnt;
char *lpntstr;
- int i, goof = 0, be_lazy = RTLD_LAZY, trace_loaded_objects = 0;
+ unsigned int i;
+ int unlazy = 0, trace_loaded_objects = 0;
struct dyn_elf *rpnt;
struct elf_resolve *tcurr;
struct elf_resolve *tpnt1;
- unsigned long brk_addr, *lpnt;
- int (*_dl_atexit) (void *);
-#if defined (__SUPPORT_LD_DEBUG__)
- int (*_dl_on_exit) (void (*FUNCTION)(int STATUS, void *ARG),void*);
-#endif
-
-
-#ifdef __SUPPORT_LD_DEBUG_EARLY__
- /* Wahoo!!! */
- SEND_STDERR("Cool, we managed to make a function call.\n");
-#endif
-
+ struct elf_resolve app_tpnt_tmp;
+ struct elf_resolve *app_tpnt = &app_tpnt_tmp;
+ struct r_debug *debug_addr;
+ unsigned long *lpnt;
+ unsigned long *_dl_envp; /* The environment address */
+ ElfW(Addr) relro_addr = 0;
+ size_t relro_size = 0;
+
+ /* Wahoo!!! We managed to make a function call! Get malloc
+ * setup so we can use _dl_dprintf() to print debug noise
+ * instead of the SEND_STDERR macros used in dl-startup.c */
+
+ _dl_memset(app_tpnt, 0x00, sizeof(*app_tpnt));
+
+ /* 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;
+ * be first since things like _dl_dprintf() use _dl_malloc()...
+ */
+ _dl_malloc_addr = (unsigned char *)_dl_pagesize;
+ _dl_mmap_zero = 0;
+
+ /* Wahoo!!! */
+ _dl_debug_early("Cool, ldso survived making function calls\n");
/* 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];
}
+ if (_start == (void *) auxvt[AT_ENTRY].a_un.a_val) {
+ _dl_dprintf(_dl_debug_file, "Standalone execution is not supported yet\n");
+ _dl_exit(1);
+ }
+
/* 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. */
- lpnt = (unsigned long *) (tpnt->dynamic_info[DT_PLTGOT] + load_addr);
+ * will need to properly deal with that as well.
+ */
+ rpnt = NULL;
+ if (_dl_getenv("LD_BIND_NOW", envp))
+ unlazy = RTLD_NOW;
- tpnt->chains = hash_addr;
- tpnt->next = 0;
- tpnt->libname = 0;
- tpnt->libtype = program_interpreter;
- tpnt->loadaddr = (ElfW(Addr)) load_addr;
+ /* 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 == (size_t)-1 && _dl_suid_ok()) ||
+ (auxvt[AT_UID].a_un.a_val != (size_t)-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;
+ /* SUID binaries can be exploited if they do LAZY relocation. */
+ unlazy = RTLD_NOW;
+ }
-#ifdef ALLOW_ZERO_PLTGOT
- if (tpnt->dynamic_info[DT_PLTGOT])
-#endif
- {
- INIT_GOT(lpnt, tpnt);
-#ifdef __SUPPORT_LD_DEBUG_EARLY__
- _dl_dprintf(_dl_debug_file, "GOT found at %x\n", lpnt);
+ /* sjhill: your TLS init should go before this */
+#ifdef __UCLIBC_HAS_SSP__
+ /* Set up the stack checker's canary. */
+ stack_chk_guard = _dl_setup_stack_chk_guard ();
+# ifdef THREAD_SET_STACK_GUARD
+ THREAD_SET_STACK_GUARD (stack_chk_guard);
+# else
+ __stack_chk_guard = stack_chk_guard;
+# endif
#endif
- }
- /* OK, this was a big step, now we need to scan all of the user images
- and load them properly. */
+ /* 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.
+ */
+
+ /* Find the runtime load address of the main executable. This may be
+ * different from what the ELF header says for ET_DYN/PIE executables.
+ */
{
- ElfW(Ehdr) *epnt;
- ElfW(Phdr) *myppnt;
- int j;
+ unsigned int idx;
+ ElfW(Phdr) *phdr = (ElfW(Phdr) *) auxvt[AT_PHDR].a_un.a_val;
- 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;
+ for (idx = 0; idx < auxvt[AT_PHNUM].a_un.a_val; idx++, phdr++)
+ if (phdr->p_type == PT_PHDR) {
+ app_tpnt->loadaddr = (ElfW(Addr)) (auxvt[AT_PHDR].a_un.a_val - phdr->p_vaddr);
+ break;
}
- }
- }
- brk_addr = 0;
- rpnt = NULL;
+ if (app_tpnt->loadaddr)
+ _dl_debug_early("Position Independent Executable: "
+ "app_tpnt->loadaddr=%x\n", app_tpnt->loadaddr);
+ }
- /* 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 */
+ /*
+ * 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;
+ ppnt = (ElfW(Phdr) *) auxvt[AT_PHDR].a_un.a_val;
for (i = 0; i < auxvt[AT_PHNUM].a_un.a_val; i++, ppnt++) {
- if (ppnt->p_type == PT_LOAD) {
-#ifndef __UCLIBC_PIE_SUPPORT__
- if (ppnt->p_vaddr + ppnt->p_memsz > brk_addr)
- brk_addr = ppnt->p_vaddr + ppnt->p_memsz;
-#else
- if (ppnt->p_vaddr + app_tpnt->loadaddr + ppnt->p_memsz > brk_addr)
- brk_addr = ppnt->p_vaddr + app_tpnt->loadaddr + ppnt->p_memsz;
-#endif
+ if (ppnt->p_type == PT_GNU_RELRO) {
+ relro_addr = ppnt->p_vaddr;
+ relro_size = ppnt->p_memsz;
}
if (ppnt->p_type == PT_DYNAMIC) {
+ dpnt = (ElfW(Dyn) *) (ppnt->p_vaddr + app_tpnt->loadaddr);
+ _dl_parse_dynamic_info(dpnt, app_tpnt->dynamic_info, debug_addr, app_tpnt->loadaddr);
+#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_debug_early("calling mprotect on the application program\n");
+ /* Now cover the application program. */
+ if (app_tpnt->dynamic_info[DT_TEXTREL]) {
+ ppnt = (ElfW(Phdr) *) auxvt[AT_PHDR].a_un.a_val;
+ for (i = 0; i < auxvt[AT_PHNUM].a_un.a_val; i++, ppnt++) {
+ if (ppnt->p_type == PT_LOAD && !(ppnt->p_flags & PF_W))
+ _dl_mprotect((void *) ((ppnt->p_vaddr + app_tpnt->loadaddr) & PAGE_ALIGN),
+ ((ppnt->p_vaddr + app_tpnt->loadaddr) & ADDR_ALIGN) +
+ (unsigned long) ppnt->p_filesz,
+ PROT_READ | PROT_WRITE | PROT_EXEC);
+ }
+ }
+#endif
+
#ifndef ALLOW_ZERO_PLTGOT
/* make sure it's really there. */
if (app_tpnt->dynamic_info[DT_PLTGOT] == 0)
continue;
#endif
/* OK, we have what we need - slip this one into the list. */
-#ifndef __UCLIBC_PIE_SUPPORT__
- app_tpnt = _dl_add_elf_hash_table("", 0,
- app_tpnt->dynamic_info, ppnt->p_vaddr, ppnt->p_filesz);
-#else
- app_tpnt = _dl_add_elf_hash_table("", (char *)app_tpnt->loadaddr,
+ app_tpnt = _dl_add_elf_hash_table(_dl_progname, (char *)app_tpnt->loadaddr,
app_tpnt->dynamic_info, ppnt->p_vaddr + app_tpnt->loadaddr, ppnt->p_filesz);
-#endif
_dl_loaded_modules->libtype = elf_executable;
- _dl_loaded_modules->ppnt = (ElfW(Phdr) *) auxvt[AT_PHDR].a_un.a_ptr;
+ _dl_loaded_modules->ppnt = (ElfW(Phdr) *) auxvt[AT_PHDR].a_un.a_val;
_dl_loaded_modules->n_phent = auxvt[AT_PHNUM].a_un.a_val;
_dl_symbol_tables = rpnt = (struct dyn_elf *) _dl_malloc(sizeof(struct dyn_elf));
_dl_memset(rpnt, 0, sizeof(struct dyn_elf));
rpnt->dyn = _dl_loaded_modules;
+ app_tpnt->rtld_flags = unlazy | RTLD_GLOBAL;
app_tpnt->usage_count++;
app_tpnt->symbol_scope = _dl_symbol_tables;
-#ifndef __UCLIBC_PIE_SUPPORT__
lpnt = (unsigned long *) (app_tpnt->dynamic_info[DT_PLTGOT]);
-#else
- lpnt = (unsigned long *) (app_tpnt->dynamic_info[DT_PLTGOT] + app_tpnt->loadaddr);
-#endif
#ifdef ALLOW_ZERO_PLTGOT
if (lpnt)
#endif
}
/* OK, fill this in - we did not have this before */
- 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));
-
- /* Determine if the shared lib loader is a symlink */
- _dl_memset(buf, 0, sizeof(buf));
- readsize = _dl_readlink(tpnt->libname, buf, sizeof(buf));
- if (readsize > 0 && readsize < (int)(sizeof(buf)-1)) {
- 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);
-#endif
- tpnt->libname = _dl_strdup(buf);
- }
- }
+ if (ppnt->p_type == PT_INTERP) {
+ char *ptmp;
- /* 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) {
- *pnt1 = '\0';
- _dl_ldsopath = pnt;
- } else {
- _dl_ldsopath = tpnt->libname;
- }
-#ifdef __SUPPORT_LD_DEBUG_EARLY__
- _dl_dprintf(_dl_debug_file, "Lib Loader:\t(%x) %s\n", tpnt->loadaddr, tpnt->libname);
-#endif
- }
- }
+ tpnt->libname = (char *) ppnt->p_vaddr + app_tpnt->loadaddr;
+ /* Store the path where the shared lib loader was found
+ * for later use
+ */
+ _dl_ldsopath = _dl_strdup(tpnt->libname);
+ ptmp = _dl_strrchr(_dl_ldsopath, '/');
+ if (ptmp != _dl_ldsopath)
+ *ptmp = '\0';
- /* 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 (_dl_getenv("LD_BIND_NOW", envp))
- be_lazy = 0;
-
- 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;
+ _dl_debug_early("Lib Loader: (%x) %s\n", tpnt->loadaddr, tpnt->libname);
}
}
+ app_tpnt->relro_addr = relro_addr;
+ app_tpnt->relro_size = relro_size;
#ifdef __SUPPORT_LD_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_detail = _dl_strstr(_dl_debug, "detail");
- _dl_debug_move = _dl_strstr(_dl_debug, "move");
- _dl_debug_symbols = _dl_strstr(_dl_debug, "sym");
- _dl_debug_reloc = _dl_strstr(_dl_debug, "reloc");
- _dl_debug_nofixups = _dl_strstr(_dl_debug, "nofix");
- _dl_debug_bindings = _dl_strstr(_dl_debug, "bind");
- }
+ _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 = (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_reloc = _dl_strstr(_dl_debug, "reloc");
+ _dl_debug_nofixups = _dl_strstr(_dl_debug, "nofix");
+ _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)
- {
- char tmp[22], *tmp1, *filename;
- int len1, len2;
-
- _dl_memset(tmp, 0, sizeof(tmp));
- 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)
- {
- _dl_strcpy (filename, dl_debug_output);
- filename[len1] = '.';
- _dl_strcpy (&filename[len1+1], tmp1);
-
- _dl_debug_file= _dl_open (filename, O_WRONLY|O_CREAT);
- if (_dl_debug_file<0)
- {
- _dl_debug_file = 2;
- _dl_dprintf (2, "can't open file: '%s'\n",filename);
- }
- }
- }
+ const char *dl_debug_output;
+
+ dl_debug_output = _dl_getenv("LD_DEBUG_OUTPUT", envp);
+
+ 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());
+
+ len1 = _dl_strlen(dl_debug_output);
+ len2 = _dl_strlen(tmp1);
+
+ filename = _dl_malloc(len1+len2+2);
+
+ 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) {
+ _dl_debug_file = 2;
+ _dl_dprintf(_dl_debug_file, "can't open file: '%s'\n",filename);
+ }
+ }
+ }
}
-
-
-#endif
+#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)))
- {
- continue;
- }
-#if defined (__SUPPORT_LD_DEBUG__)
- if(_dl_debug) _dl_dprintf(_dl_debug_file, "\tfile='%s'; needed by '%s'\n",
- str, _dl_progname);
-#endif
+
+ if (!_dl_secure || _dl_strchr(str, '/') == NULL) {
+ _dl_if_debug_dprint("\tfile='%s'; needed by '%s'\n", str, _dl_progname);
+
tpnt1 = _dl_load_shared_library(_dl_secure, &rpnt, NULL, str, trace_loaded_objects);
if (!tpnt1) {
#ifdef __LDSO_LDD_SUPPORT__
if (trace_loaded_objects)
_dl_dprintf(1, "\t%s => not found\n", str);
- else
+ else
#endif
{
- _dl_dprintf(2, "%s: can't load " "library '%s'\n", _dl_progname, str);
+ _dl_dprintf(_dl_debug_file, "%s: can't load " "library '%s'\n", _dl_progname, str);
_dl_exit(15);
}
} else {
-#ifdef __SUPPORT_LD_DEBUG_EARLY__
- _dl_dprintf(_dl_debug_file, "Loading:\t(%x) %s\n", tpnt1->loadaddr, tpnt1->libname);
-#endif
+ tpnt1->rtld_flags = unlazy | RTLD_GLOBAL;
+
+ _dl_debug_early("Loading: (%x) %s\n", tpnt1->loadaddr, tpnt1->libname);
+
#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);
+ _dl_dprintf(1, "\t%s => %s (%x)\n", str, tpnt1->libname,
+ tpnt1->loadaddr);
}
#endif
}
}
+
*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) {
- _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(_dl_debug_file, "%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(_dl_debug_file, "%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 */ ;
-
- 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)))
- {
- 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 {
-#ifdef __SUPPORT_LD_DEBUG_EARLY__
- _dl_dprintf(_dl_debug_file, "Loading:\t(%x) %s\n", tpnt1->loadaddr, tpnt1->libname);
-#endif
+ /* 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';
+
+ _dl_if_debug_dprint("\tfile='%s'; needed by '%s'\n", cp2, _dl_progname);
+
+ 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(_dl_debug_file, "%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 */ ;
- }
+ _dl_debug_early("Loading: (%x) %s\n", tpnt1->loadaddr, tpnt1->libname);
- _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
}
+
+ /* find start of next library */
+ *cp = c;
+ for ( /*nada */ ; *cp && *cp == ' '; cp++)
+ /*nada */ ;
}
- }
-#endif
- 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)
- {
+ _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) {
+ ElfW(Dyn) *this_dpnt;
+
+ nlist++;
+ for (this_dpnt = (ElfW(Dyn) *) tcurr->dynamic_addr; this_dpnt->d_tag; this_dpnt++) {
+ if (this_dpnt->d_tag == DT_NEEDED) {
char *name;
- lpntstr = (char*) (tcurr->loadaddr + tcurr->dynamic_info[DT_STRTAB] + dpnt->d_un.d_val);
- name = _dl_get_last_path_component(lpntstr);
+ struct init_fini_list *tmp;
- if ((tpnt1 = _dl_check_if_named_library_is_loaded(name, trace_loaded_objects)))
- {
+ lpntstr = (char*) (tcurr->dynamic_info[DT_STRTAB] + this_dpnt->d_un.d_val);
+ name = _dl_get_last_path_component(lpntstr);
+ if (_dl_strcmp(name, UCLIBC_LDSO) == 0)
continue;
- }
-#if defined (__SUPPORT_LD_DEBUG__)
- 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)))
- {
+
+ _dl_if_debug_dprint("\tfile='%s'; needed by '%s'\n", lpntstr, _dl_progname);
+
+ 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
+ } else
#endif
{
- _dl_dprintf(2, "%s: can't load library '%s'\n", _dl_progname, lpntstr);
+ _dl_dprintf(_dl_debug_file, "%s: can't load library '%s'\n", _dl_progname, lpntstr);
_dl_exit(16);
}
- } else {
-#ifdef __SUPPORT_LD_DEBUG_EARLY__
- _dl_dprintf(_dl_debug_file, "Loading:\t(%x) %s\n", tpnt1->loadaddr, tpnt1->libname);
-#endif
+ }
+
+ 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;
+
+ _dl_debug_early("Loading: (%x) %s\n", tpnt1->loadaddr, tpnt1->libname);
+
#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. */
+ init_fini_list = _dl_malloc(nlist * sizeof(struct elf_resolve *));
+ i = 0;
+ for (tcurr = _dl_loaded_modules->next; tcurr; tcurr = tcurr->next) {
+ init_fini_list[i++] = tcurr;
+ }
- _dl_unmap_cache();
+ /* Sort the INIT/FINI list in dependency order. */
+ for (tcurr = _dl_loaded_modules->next; tcurr; tcurr = tcurr->next) {
+ int j, k;
+
+ 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];
+ _dl_if_debug_dprint("Move %s from pos %d to %d in INIT/FINI list\n", here->libname, k, j);
+ 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(_dl_debug_file, "\nINIT/FINI order and dependencies:\n");
+ for (i = 0; i < nlist; i++) {
+ struct init_fini_list *tmp;
+
+ _dl_dprintf(_dl_debug_file, "lib: %s has deps:\n",
+ init_fini_list[i]->libname);
+ tmp = init_fini_list[i]->init_fini;
+ for (; tmp; tmp = tmp->next)
+ _dl_dprintf(_dl_debug_file, " %s ", tmp->tpnt->libname);
+ _dl_dprintf(_dl_debug_file, "\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.
+ * 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) {
- tcurr = _dl_loaded_modules;
- if (tcurr)
- while (tcurr->next)
- tcurr = tcurr->next;
- tpnt->next = NULL;
- tpnt->usage_count++;
+ ElfW(Ehdr) *epnt = (ElfW(Ehdr) *) auxvt[AT_BASE].a_un.a_val;
+ ElfW(Phdr) *myppnt = (ElfW(Phdr) *) (load_addr + epnt->e_phoff);
+ int j;
- if (tcurr) {
- tcurr->next = tpnt;
- tpnt->prev = tcurr;
- } else {
- _dl_loaded_modules = tpnt;
- tpnt->prev = NULL;
+ 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;
if (rpnt) {
rpnt->next = (struct dyn_elf *) _dl_malloc(sizeof(struct dyn_elf));
_dl_memset(rpnt->next, 0, sizeof(struct dyn_elf));
_dl_memset(rpnt, 0, sizeof(struct dyn_elf));
}
rpnt->dyn = tpnt;
+ tpnt->rtld_flags = RTLD_NOW | RTLD_GLOBAL; /* Must not be LAZY */
+#ifdef RERELOCATE_LDSO
+ /* Only rerelocate functions for now. */
+ tpnt->init_flag = RELOCS_DONE;
+ lpnt = (unsigned long *) (tpnt->dynamic_info[DT_PLTGOT]);
+# ifdef ALLOW_ZERO_PLTGOT
+ if (tpnt->dynamic_info[DT_PLTGOT])
+# endif
+ INIT_GOT(lpnt, tpnt);
+#else
+ 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
+ _dl_debug_early("Beginning relocation fixups\n");
#ifdef __mips__
/*
* Relocation of the GOT entries for MIPS have to be done
* after all the libraries have been loaded.
*/
- _dl_perform_mips_global_got_relocations(_dl_loaded_modules);
+ _dl_perform_mips_global_got_relocations(_dl_loaded_modules, !unlazy);
#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, be_lazy);
+ if (_dl_fixup(_dl_symbol_tables, unlazy))
+ _dl_exit(-1);
-
- /* 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_brkp = (unsigned long *) (intptr_t) _dl_find_hash("___brk_addr", NULL, NULL, symbolrel);
-
- if (_dl_brkp) {
- *_dl_brkp = brk_addr;
+ for (tpnt = _dl_loaded_modules; tpnt; tpnt = tpnt->next) {
+ if (tpnt->relro_size)
+ _dl_protect_relro (tpnt);
}
- _dl_envp = (unsigned long *) (intptr_t) _dl_find_hash("__environ", NULL, NULL, symbolrel);
- if (_dl_envp) {
+ /* 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
+#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]) {
- _dl_mprotect((void *) (tpnt->loadaddr + (myppnt->p_vaddr & PAGE_ALIGN)),
+ _dl_mprotect((void *) (tpnt->loadaddr + (myppnt->p_vaddr & PAGE_ALIGN)),
(myppnt->p_vaddr & ADDR_ALIGN) + (unsigned long) myppnt->p_filesz, LXFLAGS(myppnt->p_flags));
}
}
}
#endif
- _dl_atexit = (int (*)(void *)) (intptr_t) _dl_find_hash("atexit", NULL, NULL, symbolrel);
-#if defined (__SUPPORT_LD_DEBUG__)
- _dl_on_exit = (int (*)(void (*)(int, void *),void*))
- (intptr_t) _dl_find_hash("on_exit", NULL, NULL, symbolrel);
-#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 !! */
+ /* Run pre-initialization functions for the executable. */
+ _dl_run_array_forward(_dl_loaded_modules->dynamic_info[DT_PREINIT_ARRAY],
+ _dl_loaded_modules->dynamic_info[DT_PREINIT_ARRAYSZ],
+ _dl_loaded_modules->loadaddr);
+ /* Run initialization functions for loaded objects. For the
+ main executable, they will be run from __uClibc_main. */
+ 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);
-#endif
+
+ _dl_if_debug_dprint("calling INIT: %s\n\n", tpnt->libname);
+
(*dl_elf_func) ();
}
- 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)
- {
- (*_dl_on_exit)(debug_fini, tpnt->libname);
- }
-#endif
- }
-#if defined (__SUPPORT_LD_DEBUG__)
- 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
+
+ _dl_run_init_array(tpnt);
}
+ /* 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);
+
/* Notify the debugger that all objects are now mapped in. */
_dl_debug_addr->r_state = RT_CONSISTENT;
_dl_debug_state();
return 0;
}
-#include "hash.c"
-#include "readelflib1.c"
+void *_dl_malloc(int size)
+{
+ void *retval;
+
+#if 0
+ _dl_debug_early("request for %d bytes\n", size);
+#endif
+
+ if (_dl_malloc_function)
+ return (*_dl_malloc_function) (size);
+
+ if (_dl_malloc_addr - _dl_mmap_zero + (unsigned)size > _dl_pagesize) {
+ _dl_debug_early("mmapping more memory\n");
+ _dl_mmap_zero = _dl_malloc_addr = _dl_mmap((void *) 0, size,
+ PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
+ if (_dl_mmap_check_error(_dl_mmap_zero)) {
+ _dl_dprintf(_dl_debug_file, "%s: mmap of a spare page failed!\n", _dl_progname);
+ _dl_exit(20);
+ }
+ }
+ retval = _dl_malloc_addr;
+ _dl_malloc_addr += size;
+
+ /*
+ * 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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