static void debug_reloc(Elf32_Sym *symtab,char *strtab, ELF_RELOC *rpnt)
{
if(_dl_debug_reloc)
{
int symtab_index;
const char *sym;
symtab_index = ELF32_R_SYM(rpnt->r_info);
sym = symtab_index ? strtab + symtab[symtab_index].st_name : "sym=0x0";
if(_dl_debug_symbols)
_dl_dprintf(_dl_debug_file, "\n\t");
else
_dl_dprintf(_dl_debug_file, "\n%s\n\t", sym);
#ifdef ELF_USES_RELOCA
_dl_dprintf(_dl_debug_file, "%s\toffset=%x\taddend=%x",
_dl_reltypes(ELF32_R_TYPE(rpnt->r_info)),
rpnt->r_offset,
rpnt->r_addend);
#else
_dl_dprintf(_dl_debug_file, "%s\toffset=%x\n",
_dl_reltypes(ELF32_R_TYPE(rpnt->r_info)),
rpnt->r_offset);
#endif
}
}
static int _dl_do_reloc(struct elf_resolve *tpnt, struct dyn_elf *scope,
Elf32_Rela *rpnt, Elf32_Sym *symtab, char *strtab)
{
int reloc_type;
int symtab_index;
char *symname;
unsigned long *reloc_addr;
unsigned long symbol_addr;
#if defined(__SUPPORT_LD_DEBUG__)
unsigned long old_val;
#endif
reloc_addr = (unsigned long *)(tpnt->loadaddr + rpnt->r_offset);
reloc_type = ELF32_R_TYPE(rpnt->r_info);
symtab_index = ELF32_R_SYM(rpnt->r_info);
symbol_addr = 0;
symname = strtab + symtab[symtab_index].st_name;
if (symtab_index) {
symbol_addr = (unsigned long)
_dl_find_hash(strtab + symtab[symtab_index].st_name,
tpnt->symbol_scope, tpnt,
elf_machine_type_class(reloc_type));
/* Allow undefined references to weak symbols */
if (!symbol_addr &&
ELF32_ST_BIND(symtab[symtab_index].st_info) != STB_WEAK) {
_dl_dprintf(2, "%s: can't resolve symbol '%s'\n",
_dl_progname, symname);
return 0;
}
}
#if defined(__SUPPORT_LD_DEBUG__)
old_val = *reloc_addr;
#endif
switch (reloc_type) {
case R_AVR32_NONE:
break;
case R_AVR32_GLOB_DAT:
case R_AVR32_JMP_SLOT:
*reloc_addr = symbol_addr + rpnt->r_addend;
break;
case R_AVR32_RELATIVE:
*reloc_addr = (unsigned long)tpnt->loadaddr
+ rpnt->r_addend;
break;
default:
return -1;
}
#if defined(__SUPPORT_LD_DEBUG__)
if (_dl_debug_reloc && _dl_debug_detail)
_dl_dprintf(_dl_debug_file, "\tpatched: %x ==> %x @ %x\n",
old_val, *reloc_addr);
#endif
return 0;
}
unsigned long
_dl_linux_resolver(struct elf_resolve *tpnt, int reloc_entry)
{
int reloc_type;
int symtab_index;
char *strtab;
char *symname;
char *new_addr;
char *rel_addr;
char **got_addr;
Elf32_Sym *symtab;
ELF_RELOC *this_reloc;
unsigned long instr_addr;
rel_addr = (char *)tpnt->dynamic_info[DT_JMPREL];
this_reloc = (ELF_RELOC *)(intptr_t)(rel_addr + reloc_entry);
reloc_type = ELF32_R_TYPE(this_reloc->r_info);
symtab_index = ELF32_R_SYM(this_reloc->r_info);
symtab = (Elf32_Sym *)(intptr_t)tpnt->dynamic_info[DT_SYMTAB];
strtab = (char *)tpnt->dynamic_info[DT_STRTAB];
symname = strtab + symtab[symtab_index].st_name;
if (unlikely(reloc_type != R_CRIS_JUMP_SLOT)) {
_dl_dprintf(2, "%s: Incorrect relocation type in jump relocations\n",
_dl_progname);
_dl_exit(1);
}
/* Address of the jump instruction to fix up. */
instr_addr = ((unsigned long)this_reloc->r_offset +
(unsigned long)tpnt->loadaddr);
got_addr = (char **)instr_addr;
/* Get the address of the GOT entry. */
new_addr = _dl_find_hash(symname, tpnt->symbol_scope, tpnt, ELF_RTYPE_CLASS_PLT);
if (unlikely(!new_addr)) {
_dl_dprintf(2, "%s: Can't resolve symbol '%s'\n", _dl_progname, symname);
_dl_exit(1);
}
#if defined (__SUPPORT_LD_DEBUG__)
if (_dl_debug_bindings) {
_dl_dprintf(_dl_debug_file, "\nresolve function: %s", symname);
if (_dl_debug_detail)
_dl_dprintf(_dl_debug_file,
"\n\tpatched: %x ==> %x @ %x",
*got_addr, new_addr, got_addr);
}
if (!_dl_debug_nofixups) {
*got_addr = new_addr;
}
#else
*got_addr = new_addr;
#endif
return (unsigned long)new_addr;
}
_dl_linux_resolver (struct elf_resolve *tpnt, int reloc_entry)
{
ELF_RELOC *this_reloc;
char *strtab;
ElfW(Sym) *symtab;
int symtab_index;
char *rel_addr;
struct elf_resolve *new_tpnt;
char *new_addr;
struct funcdesc_value funcval;
struct funcdesc_value volatile *got_entry;
char *symname;
rel_addr = (char *)tpnt->dynamic_info[DT_JMPREL];
this_reloc = (ELF_RELOC *)(intptr_t)(rel_addr + reloc_entry);
symtab_index = ELF_R_SYM(this_reloc->r_info);
symtab = (Elf32_Sym *) tpnt->dynamic_info[DT_SYMTAB];
strtab = (char *) tpnt->dynamic_info[DT_STRTAB];
symname= strtab + symtab[symtab_index].st_name;
/* Address of GOT entry fix up */
got_entry = (struct funcdesc_value *) DL_RELOC_ADDR(tpnt->loadaddr, this_reloc->r_offset);
/* Get the address to be used to fill in the GOT entry. */
new_addr = _dl_lookup_hash(symname, tpnt->symbol_scope, NULL, 0, &new_tpnt);
if (!new_addr) {
new_addr = _dl_lookup_hash(symname, NULL, NULL, 0, &new_tpnt);
if (!new_addr) {
_dl_dprintf(2, "%s: can't resolve symbol '%s'\n",
_dl_progname, symname);
_dl_exit(1);
}
}
funcval.entry_point = new_addr;
funcval.got_value = new_tpnt->loadaddr.got_value;
#if defined (__SUPPORT_LD_DEBUG__)
if (_dl_debug_bindings) {
_dl_dprintf(_dl_debug_file, "\nresolve function: %s", symname);
if (_dl_debug_detail)
_dl_dprintf(_dl_debug_file,
"\n\tpatched (%x,%x) ==> (%x,%x) @ %x\n",
got_entry->entry_point, got_entry->got_value,
funcval.entry_point, funcval.got_value,
got_entry);
}
if (1 || !_dl_debug_nofixups) {
*got_entry = funcval;
}
#else
*got_entry = funcval;
#endif
return got_entry;
}
static int
_dl_parse(struct elf_resolve *tpnt, struct dyn_elf *scope,
unsigned long rel_addr, unsigned long rel_size,
int (*reloc_fnc)(struct elf_resolve *tpnt, struct dyn_elf *scope,
ELF_RELOC *rpnt, Elf32_Sym *symtab, char *strtab))
{
int symtab_index;
unsigned int i;
char *strtab;
Elf32_Sym *symtab;
ELF_RELOC *rpnt;
/* Parse the relocation information. */
rpnt = (ELF_RELOC *)(intptr_t)rel_addr;
rel_size /= sizeof(ELF_RELOC);
symtab = (Elf32_Sym *)(intptr_t)tpnt->dynamic_info[DT_SYMTAB];
strtab = (char *)tpnt->dynamic_info[DT_STRTAB];
for (i = 0; i < rel_size; i++, rpnt++) {
int res;
symtab_index = ELF32_R_SYM(rpnt->r_info);
debug_sym(symtab, strtab, symtab_index);
debug_reloc(symtab, strtab, rpnt);
/* Pass over to actual relocation function. */
res = reloc_fnc(tpnt, scope, rpnt, symtab, strtab);
if (res == 0)
continue;
_dl_dprintf(2, "\n%s: ", _dl_progname);
if (symtab_index)
_dl_dprintf(2, "symbol '%s': ",
strtab + symtab[symtab_index].st_name);
if (unlikely(res < 0)) {
int reloc_type = ELF32_R_TYPE(rpnt->r_info);
#if defined (__SUPPORT_LD_DEBUG__)
_dl_dprintf(2, "can't handle reloc type %s\n",
_dl_reltypes(reloc_type));
#else
_dl_dprintf(2, "can't handle reloc type %x\n",
reloc_type);
#endif
_dl_exit(-res);
} else if (unlikely(res > 0)) {
_dl_dprintf(2, "can't resolve symbol\n");
return res;
}
}
return 0;
}
unsigned long _dl_linux_resolver(struct elf_resolve *tpnt, int reloc_entry)
{
ELF_RELOC *this_reloc;
char *strtab;
char *symname;
Elf32_Sym *symtab;
ELF_RELOC *rel_addr;
int symtab_index;
unsigned long new_addr;
char **got_addr;
unsigned long instr_addr;
rel_addr = (ELF_RELOC *) tpnt->dynamic_info[DT_JMPREL];
this_reloc = rel_addr + reloc_entry;
symtab_index = ELF32_R_SYM(this_reloc->r_info);
symtab = (Elf32_Sym *) tpnt->dynamic_info[DT_SYMTAB];
strtab = (char *) tpnt->dynamic_info[DT_STRTAB];
symname = strtab + symtab[symtab_index].st_name;
/* Address of jump instruction to fix up */
instr_addr = ((unsigned long) this_reloc->r_offset +
(unsigned long) tpnt->loadaddr);
got_addr = (char **) instr_addr;
/* Get the address of the GOT entry */
new_addr = _dl_find_hash(symname, &_dl_loaded_modules->symbol_scope,
tpnt, ELF_RTYPE_CLASS_PLT, NULL);
if (unlikely(!new_addr)) {
_dl_dprintf(2, "%s: can't resolve symbol '%s'\n",
_dl_progname, symname);
_dl_exit(1);
}
#if defined (__SUPPORT_LD_DEBUG__)
#if !defined __SUPPORT_LD_DEBUG_EARLY__
if ((unsigned long) got_addr < 0x40000000)
#endif
{
if (_dl_debug_bindings)
{
_dl_dprintf(_dl_debug_file, "\nresolve function: %s", symname);
if (_dl_debug_detail) _dl_dprintf(_dl_debug_file,
"\tpatch %x ==> %x @ %x", *got_addr, new_addr, got_addr);
}
}
if (!_dl_debug_nofixups) {
*got_addr = (char *)new_addr;
}
#else
*got_addr = (char *)new_addr;
#endif
return new_addr;
}
static int
_dl_do_lazy_reloc (struct elf_resolve *tpnt, struct dyn_elf *scope,
ELF_RELOC *rpnt, Elf32_Sym *symtab, char *strtab)
{
int reloc_type;
unsigned long *reloc_addr;
(void)scope;
(void)symtab;
(void)strtab;
reloc_addr = (unsigned long *)(intptr_t) (tpnt->loadaddr + (unsigned long) rpnt->r_offset);
reloc_type = ELF32_R_TYPE(rpnt->r_info);
#if defined (__SUPPORT_LD_DEBUG__)
{
unsigned long old_val = *reloc_addr;
#endif
switch (reloc_type) {
case R_SH_NONE:
break;
case R_SH_JMP_SLOT:
*reloc_addr += (unsigned long) tpnt->loadaddr;
break;
default:
return -1; /*call _dl_exit(1) */
}
#if defined (__SUPPORT_LD_DEBUG__)
if(_dl_debug_reloc && _dl_debug_detail)
_dl_dprintf(_dl_debug_file, "\tpatch: %x ==> %x @ %x", old_val, *reloc_addr, reloc_addr);
}
#endif
return 0;
}
/* Initialize static TLS area and DTV for current (only) thread.
libpthread implementations should provide their own hook
to handle all threads. */
void
attribute_hidden __attribute_noinline__
_dl_nothread_init_static_tls (struct link_map *map)
{
# ifdef TLS_TCB_AT_TP
void *dest = (char *) THREAD_SELF - map->l_tls_offset;
# elif defined(TLS_DTV_AT_TP)
void *dest = (char *) THREAD_SELF + map->l_tls_offset + TLS_PRE_TCB_SIZE;
# else
# error "Either TLS_TCB_AT_TP or TLS_DTV_AT_TP must be defined"
# endif
/* Fill in the DTV slot so that a later LD/GD access will find it. */
dtv_t *dtv = THREAD_DTV ();
if (!(map->l_tls_modid <= dtv[-1].counter)) {
_dl_dprintf(2, "map->l_tls_modid <= dtv[-1].counter FAILED!\n");
_dl_exit(30);
}
dtv[map->l_tls_modid].pointer.val = dest;
dtv[map->l_tls_modid].pointer.is_static = true;
/* Initialize the memory. */
_dl_memcpy(dest, map->l_tls_initimage, map->l_tls_initimage_size);
_dl_memset((dest + map->l_tls_initimage_size), '\0',
map->l_tls_blocksize - map->l_tls_initimage_size);
}
/*
* This function intentionally does not return any value but signals error
* directly, as static TLS should be rare and code handling it should
* not be inlined as much as possible.
*/
void
internal_function __attribute_noinline__
_dl_allocate_static_tls (struct link_map *map)
{
if (_dl_try_allocate_static_tls (map)) {
_dl_dprintf(2, "cannot allocate memory in static TLS block");
_dl_exit(30);
}
}
void _dlinfo(void)
{
struct elf_resolve *tpnt;
struct dyn_elf *rpnt, *hpnt;
_dl_dprintf(2, "List of loaded modules\n");
/* First start with a complete list of all of the loaded files. */
for (tpnt = _dl_loaded_modules; tpnt; tpnt = tpnt->next) {
_dl_dprintf(2, "\t%x %x %x %s %d %s\n",
(unsigned) tpnt->loadaddr, (unsigned) tpnt,
(unsigned) tpnt->symbol_scope,
type[tpnt->libtype],
tpnt->usage_count, tpnt->libname);
}
/* Next dump the module list for the application itself */
_dl_dprintf(2, "\nModules for application (%x):\n",
(unsigned) _dl_symbol_tables);
for (rpnt = _dl_symbol_tables; rpnt; rpnt = rpnt->next)
_dl_dprintf(2, "\t%x %s\n", (unsigned) rpnt->dyn, rpnt->dyn->libname);
for (hpnt = _dl_handles; hpnt; hpnt = hpnt->next_handle) {
_dl_dprintf(2, "Modules for handle %x\n", (unsigned) hpnt);
for (rpnt = hpnt; rpnt; rpnt = rpnt->next)
_dl_dprintf(2, "\t%x %s\n", (unsigned) rpnt->dyn,
rpnt->dyn->libname);
}
}
void
_dl_protect_relro (struct elf_resolve *l)
{
ElfW(Addr) base = (ElfW(Addr)) DL_RELOC_ADDR(l->loadaddr, l->relro_addr);
ElfW(Addr) start = (base & PAGE_ALIGN);
ElfW(Addr) end = ((base + l->relro_size) & PAGE_ALIGN);
_dl_if_debug_dprint("RELRO protecting %s: start:%x, end:%x\n", l->libname, start, end);
if (start != end &&
_dl_mprotect ((void *) start, end - start, PROT_READ) < 0) {
_dl_dprintf(2, "%s: cannot apply additional memory protection after relocation", l->libname);
_dl_exit(0);
}
}
static
void debug_sym(Elf32_Sym *symtab,char *strtab,int symtab_index)
{
if(_dl_debug_symbols)
{
if(symtab_index){
_dl_dprintf(_dl_debug_file, "\n%s\tvalue=%x\tsize=%x\tinfo=%x\tother=%x\tshndx=%x",
strtab + symtab[symtab_index].st_name,
symtab[symtab_index].st_value,
symtab[symtab_index].st_size,
symtab[symtab_index].st_info,
symtab[symtab_index].st_other,
symtab[symtab_index].st_shndx);
}
}
}
static void *
allocate_and_init (struct link_map *map)
{
void *newp;
newp = _dl_memalign (map->l_tls_align, map->l_tls_blocksize);
if (newp == NULL)
{
_dl_dprintf(2, "%s:%d: Out of memory!!!\n", __FUNCTION__, __LINE__);
_dl_exit(1);
}
/* Initialize the memory. */
_dl_memcpy (newp, map->l_tls_initimage, map->l_tls_initimage_size);
_dl_memset ((newp + map->l_tls_initimage_size), '\0',
map->l_tls_blocksize - map->l_tls_initimage_size);
return newp;
}
static int
_dl_do_lazy_reloc(struct elf_resolve *tpnt, struct dyn_elf *scope,
ELF_RELOC *rpnt, Elf32_Sym *symtab, char *strtab)
{
int reloc_type;
unsigned long *reloc_addr;
#if defined (__SUPPORT_LD_DEBUG__)
unsigned long old_val;
#endif
/* Don't care about these, just keep the compiler happy. */
(void)scope;
(void)symtab;
(void)strtab;
reloc_addr = (unsigned long *)(intptr_t)(tpnt->loadaddr + (unsigned long)rpnt->r_offset);
reloc_type = ELF32_R_TYPE(rpnt->r_info);
#if defined (__SUPPORT_LD_DEBUG__)
old_val = *reloc_addr;
#endif
switch (reloc_type) {
case R_CRIS_NONE:
break;
case R_CRIS_JUMP_SLOT:
*reloc_addr += (unsigned long)tpnt->loadaddr;
break;
default:
return -1; /* Calls _dl_exit(1). */
}
#if defined (__SUPPORT_LD_DEBUG__)
if (_dl_debug_reloc && _dl_debug_detail)
_dl_dprintf(_dl_debug_file, "\n\tpatched: %x ==> %x @ %x",
old_val, *reloc_addr, reloc_addr);
#endif
return 0;
}
/* No, there are cases where the SVr4 linker fails to emit COPY relocs
at all */
static int
_dl_do_copy (struct elf_resolve *tpnt, struct dyn_elf *scope,
ELF_RELOC *rpnt, Elf32_Sym *symtab, char *strtab)
{
int reloc_type;
int symtab_index;
unsigned long *reloc_addr;
unsigned long symbol_addr;
int goof = 0;
reloc_addr = (unsigned long *)(intptr_t) (tpnt->loadaddr + (unsigned long) rpnt->r_offset);
reloc_type = ELF32_R_TYPE(rpnt->r_info);
if (reloc_type != R_SH_COPY)
return 0;
symtab_index = ELF32_R_SYM(rpnt->r_info);
symbol_addr = 0;
if (symtab_index) {
symbol_addr = (unsigned long) _dl_find_hash(strtab +
symtab[symtab_index].st_name, scope,
NULL, copyrel);
if (!symbol_addr) goof++;
}
if (!goof) {
#if defined (__SUPPORT_LD_DEBUG__)
if(_dl_debug_move)
_dl_dprintf(_dl_debug_file,"\n%s move %x bytes from %x to %x",
strtab + symtab[symtab_index].st_name,
symtab[symtab_index].st_size,
symbol_addr, symtab[symtab_index].st_value);
#endif
_dl_memcpy((char *) symtab[symtab_index].st_value,
(char *) symbol_addr, symtab[symtab_index].st_size);
}
return goof;
}
int _dl_map_cache(void)
{
int fd;
struct stat st;
header_t *header;
libentry_t *libent;
int i, strtabsize;
if (_dl_cache_addr == MAP_FAILED)
return -1;
else if (_dl_cache_addr != NULL)
return 0;
if (_dl_stat(LDSO_CACHE, &st)
|| (fd = _dl_open(LDSO_CACHE, O_RDONLY|O_CLOEXEC, 0)) < 0) {
_dl_cache_addr = MAP_FAILED; /* so we won't try again */
return -1;
}
_dl_cache_size = st.st_size;
_dl_cache_addr = _dl_mmap(0, _dl_cache_size, PROT_READ, LDSO_CACHE_MMAP_FLAGS, fd, 0);
_dl_close(fd);
if (_dl_mmap_check_error(_dl_cache_addr)) {
_dl_dprintf(2, "%s:%i: can't map '%s'\n",
_dl_progname, __LINE__, LDSO_CACHE);
return -1;
}
header = (header_t *) _dl_cache_addr;
if (_dl_cache_size < sizeof(header_t) ||
_dl_memcmp(header->magic, LDSO_CACHE_MAGIC, LDSO_CACHE_MAGIC_LEN)
|| _dl_memcmp(header->version, LDSO_CACHE_VER, LDSO_CACHE_VER_LEN)
|| _dl_cache_size <
(sizeof(header_t) + header->nlibs * sizeof(libentry_t))
|| _dl_cache_addr[_dl_cache_size - 1] != '\0')
{
_dl_dprintf(2, "%s: cache '%s' is corrupt\n", _dl_progname,
LDSO_CACHE);
goto fail;
}
strtabsize = _dl_cache_size - sizeof(header_t) -
header->nlibs * sizeof(libentry_t);
libent = (libentry_t *) & header[1];
for (i = 0; i < header->nlibs; i++) {
if (libent[i].sooffset >= strtabsize ||
libent[i].liboffset >= strtabsize)
{
_dl_dprintf(2, "%s: cache '%s' is corrupt\n", _dl_progname, LDSO_CACHE);
goto fail;
}
}
return 0;
fail:
_dl_munmap(_dl_cache_addr, _dl_cache_size);
_dl_cache_addr = MAP_FAILED;
return -1;
}
void
_dl_add_to_slotinfo (struct link_map *l)
{
/* Now that we know the object is loaded successfully add
modules containing TLS data to the dtv info table. We
might have to increase its size. */
struct dtv_slotinfo_list *listp;
struct dtv_slotinfo_list *prevp;
size_t idx = l->l_tls_modid;
_dl_debug_early("Adding to slotinfo for %s\n", l->l_name);
/* Find the place in the dtv slotinfo list. */
listp = _dl_tls_dtv_slotinfo_list;
prevp = NULL; /* Needed to shut up gcc. */
do
{
/* Does it fit in the array of this list element? */
if (idx < listp->len)
break;
idx -= listp->len;
prevp = listp;
listp = listp->next;
}
while (listp != NULL);
if (listp == NULL)
{
/* When we come here it means we have to add a new element
to the slotinfo list. And the new module must be in
the first slot. */
_dl_assert (idx == 0);
listp = prevp->next = (struct dtv_slotinfo_list *)
_dl_malloc (sizeof (struct dtv_slotinfo_list)
+ TLS_SLOTINFO_SURPLUS * sizeof (struct dtv_slotinfo));
if (listp == NULL)
{
/* We ran out of memory. We will simply fail this
call but don't undo anything we did so far. The
application will crash or be terminated anyway very
soon. */
/* We have to do this since some entries in the dtv
slotinfo array might already point to this
generation. */
++_dl_tls_generation;
_dl_dprintf (_dl_debug_file,
"cannot create TLS data structures: ABORT\n");
_dl_exit (127);
}
listp->len = TLS_SLOTINFO_SURPLUS;
listp->next = NULL;
_dl_memset (listp->slotinfo, '\0',
TLS_SLOTINFO_SURPLUS * sizeof (struct dtv_slotinfo));
}
/* Add the information into the slotinfo data structure. */
listp->slotinfo[idx].map = l;
listp->slotinfo[idx].gen = _dl_tls_generation + 1;
/* ??? ideally this would be done once per call to dlopen. However there's
no easy way to indicate whether a library used TLS, so do it here
instead. */
/* Bump the TLS generation number. */
_dl_tls_generation++;
}
/*
* We are trying to perform a static TLS relocation in MAP, but it was
* dynamically loaded. This can only work if there is enough surplus in
* the static TLS area already allocated for each running thread. If this
* object's TLS segment is too big to fit, we fail. If it fits,
* we set MAP->l_tls_offset and return.
* This function intentionally does not return any value but signals error
* directly, as static TLS should be rare and code handling it should
* not be inlined as much as possible.
*/
void
internal_function __attribute_noinline__
_dl_allocate_static_tls (struct link_map *map)
{
/* If the alignment requirements are too high fail. */
if (map->l_tls_align > _dl_tls_static_align)
{
fail:
_dl_dprintf(2, "cannot allocate memory in static TLS block");
_dl_exit(30);
}
# ifdef TLS_TCB_AT_TP
size_t freebytes;
size_t n;
size_t blsize;
freebytes = _dl_tls_static_size - _dl_tls_static_used - TLS_TCB_SIZE;
blsize = map->l_tls_blocksize + map->l_tls_firstbyte_offset;
if (freebytes < blsize)
goto fail;
n = (freebytes - blsize) & ~(map->l_tls_align - 1);
size_t offset = _dl_tls_static_used + (freebytes - n
- map->l_tls_firstbyte_offset);
map->l_tls_offset = _dl_tls_static_used = offset;
# elif defined(TLS_DTV_AT_TP)
size_t used;
size_t check;
size_t offset = roundup_pow2 (_dl_tls_static_used, map->l_tls_align);
used = offset + map->l_tls_blocksize;
check = used;
/* dl_tls_static_used includes the TCB at the beginning. */
if (check > _dl_tls_static_size)
goto fail;
map->l_tls_offset = offset;
_dl_tls_static_used = used;
# else
# error "Either TLS_TCB_AT_TP or TLS_DTV_AT_TP must be defined"
# endif
/*
* If the object is not yet relocated we cannot initialize the
* static TLS region. Delay it.
*/
if (((struct elf_resolve *) map)->init_flag & RELOCS_DONE)
{
#ifdef SHARED
/*
* Update the slot information data for at least the generation of
* the DSO we are allocating data for.
*/
if (__builtin_expect (THREAD_DTV()[0].counter != _dl_tls_generation, 0))
(void) _dl_update_slotinfo (map->l_tls_modid);
#endif
_dl_init_static_tls (map);
}
else
map->l_need_tls_init = 1;
}
static int
_dl_do_reloc(struct elf_resolve *tpnt, struct dyn_elf *scope,
ELF_RELOC *rpnt, Elf32_Sym *symtab, char *strtab)
{
int reloc_type;
int symtab_index;
char *symname;
unsigned long *reloc_addr;
unsigned long symbol_addr;
#if defined (__SUPPORT_LD_DEBUG__)
unsigned long old_val;
#endif
reloc_addr = (unsigned long *)(intptr_t)(tpnt->loadaddr + (unsigned long)rpnt->r_offset);
reloc_type = ELF32_R_TYPE(rpnt->r_info);
symtab_index = ELF32_R_SYM(rpnt->r_info);
symbol_addr = 0;
symname = strtab + symtab[symtab_index].st_name;
if (symtab_index) {
symbol_addr = (unsigned long)_dl_find_hash(symname, scope, tpnt,
elf_machine_type_class(reloc_type));
/*
* We want to allow undefined references to weak symbols - this
* might have been intentional. We should not be linking local
* symbols here, so all bases should be covered.
*/
if (unlikely(!symbol_addr && ELF32_ST_BIND(symtab[symtab_index].st_info) != STB_WEAK))
return 1;
}
#if defined (__SUPPORT_LD_DEBUG__)
old_val = *reloc_addr;
#endif
switch (reloc_type) {
case R_386_NONE:
break;
case R_386_32:
*reloc_addr += symbol_addr;
break;
case R_386_PC32:
*reloc_addr += symbol_addr - (unsigned long)reloc_addr;
break;
case R_386_GLOB_DAT:
case R_386_JMP_SLOT:
*reloc_addr = symbol_addr;
break;
case R_386_RELATIVE:
*reloc_addr += (unsigned long)tpnt->loadaddr;
break;
case R_386_COPY:
if (symbol_addr) {
#if defined (__SUPPORT_LD_DEBUG__)
if (_dl_debug_move)
_dl_dprintf(_dl_debug_file,
"\n%s move %d bytes from %x to %x",
symname, symtab[symtab_index].st_size,
symbol_addr, reloc_addr);
#endif
_dl_memcpy((char *)reloc_addr,
(char *)symbol_addr,
symtab[symtab_index].st_size);
}
break;
default:
return -1;
}
#if defined (__SUPPORT_LD_DEBUG__)
if (_dl_debug_reloc && _dl_debug_detail)
_dl_dprintf(_dl_debug_file, "\n\tpatched: %x ==> %x @ %x",
old_val, *reloc_addr, reloc_addr);
#endif
return 0;
}
static int
_dl_do_reloc (struct elf_resolve *tpnt,struct dyn_elf *scope,
ELF_RELOC *rpnt, Elf32_Sym *symtab, char *strtab)
{
int reloc_type;
int symtab_index;
unsigned long *reloc_addr;
unsigned long symbol_addr;
int goof = 0;
reloc_addr = (unsigned long *)(intptr_t) (tpnt->loadaddr + (unsigned long) rpnt->r_offset);
reloc_type = ELF32_R_TYPE(rpnt->r_info);
symtab_index = ELF32_R_SYM(rpnt->r_info);
symbol_addr = 0;
if (symtab_index) {
symbol_addr = (unsigned long) _dl_find_hash(strtab + symtab[symtab_index].st_name,
scope,
(reloc_type == R_SH_JMP_SLOT ? tpnt : NULL), symbolrel);
/*
* We want to allow undefined references to weak symbols - this might
* have been intentional. We should not be linking local symbols
* here, so all bases should be covered.
*/
if (!symbol_addr && ELF32_ST_BIND(symtab[symtab_index].st_info) == STB_GLOBAL) {
goof++;
}
}
#if defined (__SUPPORT_LD_DEBUG__)
{
unsigned long old_val = *reloc_addr;
#endif
switch (reloc_type) {
case R_SH_NONE:
break;
case R_SH_COPY:
/* handled later on */
break;
case R_SH_DIR32:
case R_SH_GLOB_DAT:
case R_SH_JMP_SLOT:
*reloc_addr = symbol_addr + rpnt->r_addend;
break;
case R_SH_REL32:
*reloc_addr = symbol_addr + rpnt->r_addend -
(unsigned long) reloc_addr;
break;
case R_SH_RELATIVE:
*reloc_addr = (unsigned long) tpnt->loadaddr + rpnt->r_addend;
break;
default:
return -1; /*call _dl_exit(1) */
}
#if defined (__SUPPORT_LD_DEBUG__)
if(_dl_debug_reloc && _dl_debug_detail)
_dl_dprintf(_dl_debug_file, "\tpatch: %x ==> %x @ %x", old_val, *reloc_addr, reloc_addr);
}
#endif
return goof;
}
int _dladdr(void *__address, Dl_info * __dlip)
{
struct elf_resolve *pelf;
struct elf_resolve *rpnt;
#ifdef USE_CACHE
_dl_map_cache();
#endif
/*
* Try and locate the module address is in
*/
pelf = NULL;
#if 0
_dl_dprintf(2, "dladdr( 0x%p, 0x%p )\n", __address, __dlip);
#endif
for (rpnt = _dl_loaded_modules; rpnt; rpnt = rpnt->next) {
struct elf_resolve *tpnt;
tpnt = rpnt;
#if 0
_dl_dprintf(2, "Module \"%s\" at 0x%p\n",
tpnt->libname, tpnt->loadaddr);
#endif
if (tpnt->loadaddr < (char *) __address
&& (pelf == NULL || pelf->loadaddr < tpnt->loadaddr)) {
pelf = tpnt;
}
}
if (!pelf) {
return 0;
}
/*
* Try and locate the symbol of address
*/
{
char *strtab;
Elf32_Sym *symtab;
int hn, si;
int sf;
int sn = 0;
void *sa = 0;
symtab = (Elf32_Sym *) (pelf->dynamic_info[DT_SYMTAB] + pelf->loadaddr);
strtab = (char *) (pelf->dynamic_info[DT_STRTAB] + pelf->loadaddr);
sf = 0;
for (hn = 0; hn < pelf->nbucket; hn++) {
for (si = pelf->elf_buckets[hn]; si; si = pelf->chains[si]) {
void *symbol_addr;
symbol_addr = pelf->loadaddr + symtab[si].st_value;
if (symbol_addr <= __address && (!sf || sa < symbol_addr)) {
sa = symbol_addr;
sn = si;
sf = 1;
}
#if 0
_dl_dprintf(2, "Symbol \"%s\" at 0x%p\n",
strtab + symtab[si].st_name, symbol_addr);
#endif
}
}
if (sf) {
__dlip->dli_fname = pelf->libname;
__dlip->dli_fbase = pelf->loadaddr;
__dlip->dli_sname = strtab + symtab[sn].st_name;
__dlip->dli_saddr = sa;
}
return 1;
}
}
static int
_dl_do_reloc(struct elf_resolve *tpnt, struct dyn_elf *scope,
ELF_RELOC *rpnt, Elf32_Sym *symtab, char *strtab)
{
int reloc_type;
int symtab_index;
char *symname;
unsigned long *reloc_addr;
unsigned long symbol_addr;
#if defined (__SUPPORT_LD_DEBUG__)
unsigned long old_val;
#endif
reloc_addr = (unsigned long *)(intptr_t)(tpnt->loadaddr + (unsigned long)rpnt->r_offset);
reloc_type = ELF32_R_TYPE(rpnt->r_info);
symtab_index = ELF32_R_SYM(rpnt->r_info);
symbol_addr = 0;
symname = strtab + symtab[symtab_index].st_name;
if (symtab_index) {
if (symtab[symtab_index].st_shndx != SHN_UNDEF &&
ELF32_ST_BIND(symtab[symtab_index].st_info) == STB_LOCAL) {
symbol_addr = (unsigned long)tpnt->loadaddr;
} else {
symbol_addr = (unsigned long)_dl_find_hash(symname, scope, tpnt,
elf_machine_type_class(reloc_type));
}
if (unlikely(!symbol_addr && ELF32_ST_BIND(symtab[symtab_index].st_info) != STB_WEAK)) {
_dl_dprintf(2, "%s: can't resolve symbol '%s'\n", _dl_progname, symname);
_dl_exit(1);
};
symbol_addr += rpnt->r_addend;
}
#if defined (__SUPPORT_LD_DEBUG__)
old_val = *reloc_addr;
#endif
switch (reloc_type) {
case R_CRIS_NONE:
break;
case R_CRIS_GLOB_DAT:
case R_CRIS_JUMP_SLOT:
case R_CRIS_32:
*reloc_addr = symbol_addr;
break;
case R_CRIS_COPY:
#if defined (__SUPPORT_LD_DEBUG__)
if (_dl_debug_move)
_dl_dprintf(_dl_debug_file,
"\n%s move %d bytes from %x to %x",
symname, symtab[symtab_index].st_size,
symbol_addr, reloc_addr);
#endif
_dl_memcpy((char *)reloc_addr,
(char *)symbol_addr,
symtab[symtab_index].st_size);
break;
case R_CRIS_RELATIVE:
*reloc_addr = (unsigned long)tpnt->loadaddr + rpnt->r_addend;
break;
default:
return -1; /* Calls _dl_exit(1). */
}
#if defined (__SUPPORT_LD_DEBUG__)
if (_dl_debug_reloc && _dl_debug_detail)
_dl_dprintf(_dl_debug_file, "\n\tpatched: %x ==> %x @ %x",
old_val, *reloc_addr, reloc_addr);
#endif
return 0;
}
static int
_dl_do_reloc (struct elf_resolve *tpnt,struct dyn_elf *scope,
ELF_RELOC *rpnt, Elf32_Sym *symtab, char *strtab)
{
int reloc_type;
int symtab_index;
char *symname;
unsigned long *reloc_addr;
unsigned long symbol_addr;
#if defined (__SUPPORT_LD_DEBUG__)
unsigned long old_val;
#endif
reloc_addr = (unsigned long *)(intptr_t) (tpnt->loadaddr + (unsigned long) rpnt->r_offset);
reloc_type = ELF32_R_TYPE(rpnt->r_info);
symtab_index = ELF32_R_SYM(rpnt->r_info);
symbol_addr = 0;
symname = strtab + symtab[symtab_index].st_name;
if (symtab_index) {
symbol_addr = (unsigned long) _dl_find_hash(symname, scope, tpnt,
elf_machine_type_class(reloc_type));
/*
* We want to allow undefined references to weak symbols - this might
* have been intentional. We should not be linking local symbols
* here, so all bases should be covered.
*/
if (!symbol_addr && ELF32_ST_BIND(symtab[symtab_index].st_info) != STB_WEAK) {
_dl_dprintf (2, "%s: can't resolve symbol '%s'\n",
_dl_progname, strtab + symtab[symtab_index].st_name);
_dl_exit (1);
}
}
#if defined (__SUPPORT_LD_DEBUG__)
old_val = *reloc_addr;
#endif
switch (reloc_type) {
case R_SH_NONE:
break;
case R_SH_COPY:
if (symbol_addr) {
#if defined (__SUPPORT_LD_DEBUG__)
if(_dl_debug_move)
_dl_dprintf(_dl_debug_file,"\n%s move %x bytes from %x to %x",
symname, symtab[symtab_index].st_size,
symbol_addr, reloc_addr);
#endif
_dl_memcpy((char *) reloc_addr, (char *) symbol_addr, symtab[symtab_index].st_size);
}
return 0; /* no further LD_DEBUG messages for copy relocs */
case R_SH_DIR32:
case R_SH_GLOB_DAT:
case R_SH_JMP_SLOT:
*reloc_addr = symbol_addr + rpnt->r_addend;
break;
case R_SH_REL32:
*reloc_addr = symbol_addr + rpnt->r_addend -
(unsigned long) reloc_addr;
break;
case R_SH_RELATIVE:
*reloc_addr = (unsigned long) tpnt->loadaddr + rpnt->r_addend;
break;
default:
return -1; /*call _dl_exit(1) */
}
#if defined (__SUPPORT_LD_DEBUG__)
if(_dl_debug_reloc && _dl_debug_detail)
_dl_dprintf(_dl_debug_file, "\tpatched: %x ==> %x @ %x", old_val, *reloc_addr, reloc_addr);
#endif
return 0;
}
static int
_dl_parse(struct elf_resolve *tpnt, struct dyn_elf *scope,
unsigned long rel_addr, unsigned long rel_size,
int (*reloc_fnc) (struct elf_resolve *tpnt, struct dyn_elf *scope,
ELF_RELOC *rpnt, Elf32_Sym *symtab, char *strtab))
{
unsigned int i;
char *strtab;
int goof = 0;
Elf32_Sym *symtab;
ELF_RELOC *rpnt;
int symtab_index;
/* Now parse the relocation information */
rpnt = (ELF_RELOC *)(intptr_t) (rel_addr + tpnt->loadaddr);
rel_size = rel_size / sizeof(ELF_RELOC);
symtab = (Elf32_Sym *)(intptr_t) (tpnt->dynamic_info[DT_SYMTAB] + tpnt->loadaddr);
strtab = (char *) (tpnt->dynamic_info[DT_STRTAB] + tpnt->loadaddr);
for (i = 0; i < rel_size; i++, rpnt++) {
int res;
symtab_index = ELF32_R_SYM(rpnt->r_info);
/* When the dynamic linker bootstrapped itself, it resolved some symbols.
Make sure we do not do them again */
if (!symtab_index && tpnt->libtype == program_interpreter)
continue;
if (symtab_index && tpnt->libtype == program_interpreter &&
_dl_symbol(strtab + symtab[symtab_index].st_name))
continue;
#if defined (__SUPPORT_LD_DEBUG__)
debug_sym(symtab,strtab,symtab_index);
debug_reloc(symtab,strtab,rpnt);
#endif
res = reloc_fnc (tpnt, scope, rpnt, symtab, strtab);
if (res==0) continue;
_dl_dprintf(2, "\n%s: ",_dl_progname);
if (symtab_index)
_dl_dprintf(2, "symbol '%s': ", strtab + symtab[symtab_index].st_name);
if (res <0)
{
int reloc_type = ELF32_R_TYPE(rpnt->r_info);
#if defined (__SUPPORT_LD_DEBUG__)
_dl_dprintf(2, "can't handle reloc type %s\n ", _dl_reltypes(reloc_type));
#else
_dl_dprintf(2, "can't handle reloc type %x\n", reloc_type);
#endif
_dl_exit(-res);
}
else if (res >0)
{
_dl_dprintf(2, "can't resolve symbol\n");
goof += res;
}
}
return goof;
}
/* This function's behavior must exactly match that
* in uClibc/ldso/util/ldd.c */
static struct elf_resolve *
search_for_named_library(const char *name, int secure, const char *path_list,
struct dyn_elf **rpnt)
{
char *path, *path_n, *mylibname;
struct elf_resolve *tpnt;
int done;
if (path_list==NULL)
return NULL;
/* We need a writable copy of this string, but we don't
* need this allocated permanently since we don't want
* to leak memory, so use alloca to put path on the stack */
done = _dl_strlen(path_list);
path = alloca(done + 1);
/* another bit of local storage */
mylibname = alloca(2050);
/* gcc inlines alloca using a single instruction adjusting
* the stack pointer and no stack overflow check and thus
* no NULL error return. No point leaving in dead code... */
#if 0
if (!path || !mylibname) {
_dl_dprintf(2, "Out of memory!\n");
_dl_exit(0);
}
#endif
_dl_memcpy(path, path_list, done+1);
/* Unlike ldd.c, don't bother to eliminate double //s */
/* Replace colons with zeros in path_list */
/* : at the beginning or end of path maps to CWD */
/* :: anywhere maps CWD */
/* "" maps to CWD */
done = 0;
path_n = path;
do {
if (*path == 0) {
*path = ':';
done = 1;
}
if (*path == ':') {
*path = 0;
if (*path_n)
_dl_strcpy(mylibname, path_n);
else
_dl_strcpy(mylibname, "."); /* Assume current dir if empty path */
_dl_strcat(mylibname, "/");
_dl_strcat(mylibname, name);
if ((tpnt = _dl_load_elf_shared_library(secure, rpnt, mylibname)) != NULL)
return tpnt;
path_n = path+1;
}
path++;
} while (!done);
return NULL;
}
static int
_dl_do_reloc (struct elf_resolve *tpnt,struct dyn_elf *scope,
ELF_RELOC *rpnt, Elf32_Sym *symtab, char *strtab)
{
int reloc_type;
int symtab_index;
char *symname;
unsigned long *reloc_addr;
unsigned long symbol_addr;
#if defined (__SUPPORT_LD_DEBUG__)
unsigned long old_val;
#endif
struct elf_resolve *tls_tpnt = NULL;
struct symbol_ref sym_ref;
reloc_addr = (unsigned long *)(intptr_t) (tpnt->loadaddr + (unsigned long) rpnt->r_offset);
reloc_type = ELF32_R_TYPE(rpnt->r_info);
symtab_index = ELF32_R_SYM(rpnt->r_info);
symbol_addr = 0;
sym_ref.sym = &symtab[symtab_index];
sym_ref.tpnt = NULL;
if (symtab_index) {
symname = strtab + symtab[symtab_index].st_name;
symbol_addr = (unsigned long) _dl_find_hash(symname, scope, tpnt,
elf_machine_type_class(reloc_type), &sym_ref);
/*
* We want to allow undefined references to weak symbols - this might
* have been intentional. We should not be linking local symbols
* here, so all bases should be covered.
*/
if (!symbol_addr
&& (ELF_ST_TYPE(symtab[symtab_index].st_info) != STT_TLS)
&& (ELF32_ST_BIND(symtab[symtab_index].st_info) != STB_WEAK)) {
_dl_dprintf(2, "%s: can't resolve symbol '%s'\n",
_dl_progname, symname);
/* Let the caller to handle the error: it may be non fatal if called from dlopen */
return 1;
}
tls_tpnt = sym_ref.tpnt;
}
#if defined (__SUPPORT_LD_DEBUG__)
old_val = *reloc_addr;
#endif
#if defined USE_TLS && USE_TLS
/* In case of a TLS reloc, tls_tpnt NULL means we have an 'anonymous'
symbol. This is the case for a static tls variable, so the lookup
module is just that one is referencing the tls variable. */
if (!tls_tpnt)
tls_tpnt = tpnt;
#endif
switch (reloc_type) {
case R_SH_NONE:
break;
case R_SH_COPY:
if (symbol_addr) {
#if defined (__SUPPORT_LD_DEBUG__)
if (_dl_debug_move)
_dl_dprintf(_dl_debug_file,"\n%s move %x bytes from %x to %x",
symname, symtab[symtab_index].st_size,
symbol_addr, reloc_addr);
#endif
_dl_memcpy((char *) reloc_addr, (char *) symbol_addr, symtab[symtab_index].st_size);
}
return 0; /* no further LD_DEBUG messages for copy relocs */
case R_SH_DIR32:
case R_SH_GLOB_DAT:
case R_SH_JMP_SLOT:
*reloc_addr = symbol_addr + rpnt->r_addend;
break;
case R_SH_REL32:
*reloc_addr = symbol_addr + rpnt->r_addend -
(unsigned long) reloc_addr;
break;
case R_SH_RELATIVE:
*reloc_addr = (unsigned long) tpnt->loadaddr + rpnt->r_addend;
break;
#if defined USE_TLS && USE_TLS
case R_SH_TLS_DTPMOD32:
*reloc_addr = tls_tpnt->l_tls_modid;
break;
case R_SH_TLS_DTPOFF32:
*reloc_addr = symbol_addr;
break;
case R_SH_TLS_TPOFF32:
CHECK_STATIC_TLS ((struct link_map *) tls_tpnt);
*reloc_addr = tls_tpnt->l_tls_offset + symbol_addr + rpnt->r_addend;
break;
#endif
default:
return -1;
}
#if defined (__SUPPORT_LD_DEBUG__)
if (_dl_debug_reloc && _dl_debug_detail)
_dl_dprintf(_dl_debug_file, "\tpatched: %x ==> %x @ %x\n", old_val, *reloc_addr, reloc_addr);
#endif
return 0;
}
static int
_dl_do_reloc(struct elf_resolve *tpnt, struct r_scope_elem *scope,
ELF_RELOC *rpnt, Elf32_Sym *symtab, char *strtab)
{
int reloc_type;
int symtab_index;
char *symname;
struct elf_resolve *tls_tpnt = NULL;
unsigned long *reloc_addr;
unsigned long symbol_addr;
#if defined (__SUPPORT_LD_DEBUG__)
unsigned long old_val;
#endif
struct symbol_ref sym_ref;
reloc_addr = (unsigned long *)(intptr_t)(tpnt->loadaddr + (unsigned long)rpnt->r_offset);
reloc_type = ELF32_R_TYPE(rpnt->r_info);
symtab_index = ELF32_R_SYM(rpnt->r_info);
symbol_addr = 0;
sym_ref.sym = &symtab[symtab_index];
sym_ref.tpnt = NULL;
symname = strtab + symtab[symtab_index].st_name;
if (symtab_index) {
symbol_addr = (unsigned long)_dl_find_hash(symname, scope, tpnt,
elf_machine_type_class(reloc_type), &sym_ref);
/*
* We want to allow undefined references to weak symbols - this
* might have been intentional. We should not be linking local
* symbols here, so all bases should be covered.
*/
if (unlikely(!symbol_addr && (ELF_ST_TYPE(symtab[symtab_index].st_info) != STT_TLS)
&& ELF32_ST_BIND(symtab[symtab_index].st_info) != STB_WEAK))
return 1;
if (_dl_trace_prelink)
_dl_debug_lookup (symname, tpnt, &symtab[symtab_index],
&sym_ref, elf_machine_type_class(reloc_type));
tls_tpnt = sym_ref.tpnt;
} else {
symbol_addr = symtab[symtab_index].st_value;
tls_tpnt = tpnt;
}
#if defined (__SUPPORT_LD_DEBUG__)
old_val = *reloc_addr;
#endif
switch (reloc_type) {
case R_386_NONE:
break;
case R_386_32:
*reloc_addr += symbol_addr;
break;
case R_386_PC32:
*reloc_addr += symbol_addr - (unsigned long)reloc_addr;
break;
case R_386_GLOB_DAT:
case R_386_JMP_SLOT:
*reloc_addr = symbol_addr;
break;
case R_386_RELATIVE:
*reloc_addr += (unsigned long)tpnt->loadaddr;
break;
case R_386_COPY:
if (symbol_addr) {
#if defined (__SUPPORT_LD_DEBUG__)
if (_dl_debug_move)
_dl_dprintf(_dl_debug_file,
"\n%s move %d bytes from %x to %x",
symname, symtab[symtab_index].st_size,
symbol_addr, reloc_addr);
#endif
_dl_memcpy((char *)reloc_addr,
(char *)symbol_addr,
symtab[symtab_index].st_size);
}
break;
#if defined USE_TLS && USE_TLS
case R_386_TLS_DTPMOD32:
*reloc_addr = tls_tpnt->l_tls_modid;
break;
case R_386_TLS_DTPOFF32:
/* During relocation all TLS symbols are defined and used.
* Therefore the offset is already correct. */
*reloc_addr = symbol_addr;
break;
case R_386_TLS_TPOFF32:
/* The offset is positive, backward from the thread pointer. */
CHECK_STATIC_TLS((struct link_map*) tls_tpnt);
*reloc_addr += tls_tpnt->l_tls_offset - symbol_addr;
break;
case R_386_TLS_TPOFF:
/* The offset is negative, forward from the thread pointer. */
CHECK_STATIC_TLS((struct link_map*) tls_tpnt);
*reloc_addr += symbol_addr - tls_tpnt->l_tls_offset;
break;
#endif
default:
return -1;
}
#if defined (__SUPPORT_LD_DEBUG__)
if (_dl_debug_reloc && _dl_debug_detail)
_dl_dprintf(_dl_debug_file, "\n\tpatched: %x ==> %x @ %x\n",
old_val, *reloc_addr, reloc_addr);
#endif
return 0;
}
static int
_dl_do_reloc (struct elf_resolve *tpnt,struct r_scope_elem *scope,
ELF_RELOC *rpnt, Elf32_Sym *symtab, char *strtab)
{
int reloc_type;
int symtab_index;
char *symname;
unsigned long *reloc_addr;
unsigned long symbol_addr;
struct symbol_ref sym_ref;
struct elf_resolve *def_mod = 0;
int goof = 0;
reloc_addr = (unsigned long *) (tpnt->loadaddr + (unsigned long) rpnt->r_offset);
reloc_type = ELF32_R_TYPE(rpnt->r_info);
symtab_index = ELF32_R_SYM(rpnt->r_info);
symbol_addr = 0;
sym_ref.sym = &symtab[symtab_index];
sym_ref.tpnt = NULL;
symname = strtab + symtab[symtab_index].st_name;
if (symtab_index) {
symbol_addr = _dl_find_hash(symname, scope, tpnt,
elf_machine_type_class(reloc_type), &sym_ref);
/*
* We want to allow undefined references to weak symbols - this might
* have been intentional. We should not be linking local symbols
* here, so all bases should be covered.
*/
if (!symbol_addr && (ELF_ST_TYPE(symtab[symtab_index].st_info) != STT_TLS)
&& (ELF32_ST_BIND(symtab[symtab_index].st_info) != STB_WEAK)) {
/* This may be non-fatal if called from dlopen. */
return 1;
}
if (_dl_trace_prelink) {
_dl_debug_lookup (symname, tpnt, &symtab[symtab_index],
&sym_ref, elf_machine_type_class(reloc_type));
}
def_mod = sym_ref.tpnt;
} else {
/*
* Relocs against STN_UNDEF are usually treated as using a
* symbol value of zero, and using the module containing the
* reloc itself.
*/
symbol_addr = symtab[symtab_index].st_value;
def_mod = tpnt;
}
#if defined (__SUPPORT_LD_DEBUG__)
{
unsigned long old_val = *reloc_addr;
#endif
switch (reloc_type) {
case R_ARM_NONE:
break;
case R_ARM_ABS32:
*reloc_addr += symbol_addr;
break;
case R_ARM_PC24:
#if 0
{
unsigned long addend;
long newvalue, topbits;
addend = *reloc_addr & 0x00ffffff;
if (addend & 0x00800000) addend |= 0xff000000;
newvalue = symbol_addr - (unsigned long)reloc_addr + (addend << 2);
topbits = newvalue & 0xfe000000;
if (topbits != 0xfe000000 && topbits != 0x00000000)
{
newvalue = fix_bad_pc24(reloc_addr, symbol_addr)
- (unsigned long)reloc_addr + (addend << 2);
topbits = newvalue & 0xfe000000;
if (unlikely(topbits != 0xfe000000 && topbits != 0x00000000))
{
_dl_dprintf(2,"symbol '%s': R_ARM_PC24 relocation out of range.",
symtab[symtab_index].st_name);
_dl_exit(1);
}
}
newvalue >>= 2;
symbol_addr = (*reloc_addr & 0xff000000) | (newvalue & 0x00ffffff);
*reloc_addr = symbol_addr;
break;
}
#else
_dl_dprintf(2,"R_ARM_PC24: Compile shared libraries with -fPIC!\n");
_dl_exit(1);
#endif
case R_ARM_GLOB_DAT:
case R_ARM_JUMP_SLOT:
*reloc_addr = symbol_addr;
break;
case R_ARM_RELATIVE:
*reloc_addr += (unsigned long) tpnt->loadaddr;
break;
case R_ARM_COPY:
_dl_memcpy((void *) reloc_addr,
(void *) symbol_addr, symtab[symtab_index].st_size);
break;
#if defined USE_TLS && USE_TLS
case R_ARM_TLS_DTPMOD32:
*reloc_addr = def_mod->l_tls_modid;
break;
case R_ARM_TLS_DTPOFF32:
*reloc_addr += symbol_addr;
break;
case R_ARM_TLS_TPOFF32:
CHECK_STATIC_TLS ((struct link_map *) def_mod);
*reloc_addr += (symbol_addr + def_mod->l_tls_offset);
break;
#endif
default:
return -1; /*call _dl_exit(1) */
}
#if defined (__SUPPORT_LD_DEBUG__)
if (_dl_debug_reloc && _dl_debug_detail)
_dl_dprintf(_dl_debug_file, "\tpatch: %x ==> %x @ %x", old_val, *reloc_addr, reloc_addr);
}
#endif
return goof;
}
__attribute__((__visibility__("hidden"))) struct funcdesc_value volatile *
_dl_linux_resolver (struct elf_resolve *tpnt, int reloc_entry)
{
int reloc_type;
ELF_RELOC *this_reloc;
char *strtab;
ElfW(Sym) *symtab;
int symtab_index;
char *rel_addr;
struct elf_resolve *new_tpnt;
char *new_addr;
struct funcdesc_value funcval;
struct funcdesc_value volatile *got_entry;
char *symname;
rel_addr = (char *)tpnt->dynamic_info[DT_JMPREL];
this_reloc = (ELF_RELOC *)(intptr_t)(rel_addr + reloc_entry);
reloc_type = ELF_R_TYPE(this_reloc->r_info);
symtab_index = ELF_R_SYM(this_reloc->r_info);
symtab = (Elf32_Sym *) tpnt->dynamic_info[DT_SYMTAB];
strtab = (char *) tpnt->dynamic_info[DT_STRTAB];
symname= strtab + symtab[symtab_index].st_name;
if (reloc_type != R_UBICOM32_FUNCDESC_VALUE) {
_dl_dprintf(2, "%s: Incorrect relocation type in jump relocations\n",
_dl_progname);
_dl_exit(1);
}
/* Address of GOT entry fix up */
got_entry = (struct funcdesc_value *) DL_RELOC_ADDR(tpnt->loadaddr, this_reloc->r_offset);
/* Get the address to be used to fill in the GOT entry. */
new_addr = _dl_lookup_hash(symname, tpnt->symbol_scope, NULL, 0, &new_tpnt);
if (!new_addr) {
new_addr = _dl_lookup_hash(symname, NULL, NULL, 0, &new_tpnt);
if (!new_addr) {
_dl_dprintf(2, "_dl_linux_resolver: %s: can't resolve symbol '%s'\n",
_dl_progname, symname);
_dl_exit(1);
}
}
funcval.entry_point = new_addr;
funcval.got_value = new_tpnt->loadaddr.got_value;
#if defined (__SUPPORT_LD_DEBUG__)
if (_dl_debug_bindings) {
_dl_dprintf(_dl_debug_file, "\nresolve function: %s", symname);
if (_dl_debug_detail)
_dl_dprintf(_dl_debug_file,
"\n\tpatched (%x,%x) ==> (%x,%x) @ %x\n",
got_entry->entry_point, got_entry->got_value,
funcval.entry_point, funcval.got_value,
got_entry);
}
if (1 || !_dl_debug_nofixups) {
got_entry->entry_point = ((void *)&_dl_ubicom32_resolve_pending);
got_entry->got_value = funcval.got_value;
got_entry->entry_point = funcval.entry_point;
}
#else
/*
* initially set the entry point to resolve pending before starting
* the update. This has the effect of putting all other requests in a
* holding pattern until the resolution is completed.
*/
got_entry->entry_point = ((void*)&_dl_ubicom32_resolve_pending);
got_entry->got_value = funcval.got_value;
got_entry->entry_point = funcval.entry_point;
#endif
return got_entry;
}
