diff options
Diffstat (limited to 'ldso/libdl')
| -rw-r--r-- | ldso/libdl/dlib.c | 289 | ||||
| -rw-r--r-- | ldso/libdl/libdl.c | 289 |
2 files changed, 394 insertions, 184 deletions
diff --git a/ldso/libdl/dlib.c b/ldso/libdl/dlib.c index a15518230..9ca624962 100644 --- a/ldso/libdl/dlib.c +++ b/ldso/libdl/dlib.c @@ -13,6 +13,7 @@ int dlclose(void *) __attribute__ ((__weak__, __alias__ ("_dlclose"))); void *dlsym(void *, const char *) __attribute__ ((__weak__, __alias__ ("_dlsym"))); const char *dlerror(void) __attribute__ ((__weak__, __alias__ ("_dlerror"))); int dladdr(void *, Dl_info *) __attribute__ ((__weak__, __alias__ ("_dladdr"))); +void _dlinfo(void); #ifdef __PIC__ @@ -121,16 +122,14 @@ static void __attribute__ ((destructor)) dl_cleanup(void) void *_dlopen(const char *libname, int flag) { - struct elf_resolve *tpnt, *tfrom; - struct dyn_elf *rpnt = NULL; - struct dyn_elf *dyn_chain; + struct elf_resolve *tpnt, *tfrom, *tcurr; + struct dyn_elf *dyn_chain, *rpnt = NULL; struct dyn_elf *dpnt; static int dl_init = 0; - char *from; + ElfW(Addr) from; + const char *libname1, *libname2, *ptr; + struct elf_resolve *tpnt1; void (*dl_brk) (void); -#ifdef __PIC__ - int (*dl_elf_init) (void); -#endif /* A bit of sanity checking... */ if (!(flag & (RTLD_LAZY|RTLD_NOW))) { @@ -138,7 +137,7 @@ void *_dlopen(const char *libname, int flag) return NULL; } - from = __builtin_return_address(0); + from = (ElfW(Addr)) __builtin_return_address(0); /* Have the dynamic linker use the regular malloc function now */ if (!dl_init) { @@ -150,9 +149,7 @@ void *_dlopen(const char *libname, int flag) if (!libname) return _dl_symbol_tables; -#ifdef USE_CACHE _dl_map_cache(); -#endif /* * Try and locate the module we were called from - we @@ -166,101 +163,204 @@ void *_dlopen(const char *libname, int flag) for (dpnt = _dl_symbol_tables; dpnt; dpnt = dpnt->next) { tpnt = dpnt->dyn; if (tpnt->loadaddr < from - && (tfrom == NULL || tfrom->loadaddr < tpnt->loadaddr)) + && (tfrom == NULL || tfrom->loadaddr < tpnt->loadaddr)) tfrom = tpnt; } + /* Skip over any initial initial './' and '/' stuff to + * get the short form libname with no path garbage */ + libname1 = libname; + ptr = _dl_strrchr(libname1, '/'); + if (ptr) { + libname1 = ptr + 1; + } + + + /* Weed out duplicates early to avoid function aliasing */ + for (tpnt1 = _dl_loaded_modules; tpnt1; tpnt1 = tpnt1->next) { + /* Skip over any initial initial './' and '/' stuff to + * get the short form libname with no path garbage */ + libname2 = tpnt1->libname; + ptr = _dl_strrchr(libname2, '/'); + if (ptr) { + libname2 = ptr + 1; + } + + if (_dl_strcmp(libname1, libname2) == 0) { + /* Well, that was certainly easy */ + return tpnt1; + } + } + + + + /* Try to load the specified library */ +#ifdef __SUPPORT_LD_DEBUG__ + _dl_dprintf(_dl_debug_file, "Trying to dlopen '%s'\n", (char*)libname); +#endif if (!(tpnt = _dl_load_shared_library(0, &rpnt, tfrom, (char*)libname))) { -#ifdef USE_CACHE _dl_unmap_cache(); -#endif return NULL; } //tpnt->libtype = loaded_file; - dyn_chain = rpnt = (struct dyn_elf *) malloc(sizeof(struct dyn_elf)); - _dl_memset(rpnt, 0, sizeof(struct dyn_elf)); - rpnt->dyn = tpnt; - rpnt->flags = flag; + + dyn_chain = (struct dyn_elf *) malloc(sizeof(struct dyn_elf)); + _dl_memset(dyn_chain, 0, sizeof(struct dyn_elf)); + dyn_chain->dyn = tpnt; + dyn_chain->flags = flag; if (!tpnt->symbol_scope) tpnt->symbol_scope = dyn_chain; - rpnt->next_handle = _dl_handles; - _dl_handles = rpnt; + dyn_chain->next_handle = _dl_handles; + _dl_handles = rpnt = dyn_chain; - /* - * OK, we have the requested file in memory. Now check for - * any other requested files that may also be required. - */ - { - struct elf_resolve *tcurr; - struct elf_resolve * tpnt1; - Elf32_Dyn * dpnt; - char * lpnt; - - tcurr = tpnt; - do{ - for(dpnt = (Elf32_Dyn *) tcurr->dynamic_addr; dpnt->d_tag; dpnt++) - { - - if(dpnt->d_tag == DT_NEEDED) - { - lpnt = tcurr->loadaddr + tcurr->dynamic_info[DT_STRTAB] + - dpnt->d_un.d_val; - if(!(tpnt1 = _dl_load_shared_library(0, &rpnt, tcurr, lpnt))) - goto oops; - rpnt->next = (struct dyn_elf *) malloc(sizeof(struct dyn_elf)); - _dl_memset (rpnt->next, 0, sizeof (struct dyn_elf)); - rpnt = rpnt->next; - if (!tpnt1->symbol_scope) tpnt1->symbol_scope = dyn_chain; - rpnt->dyn = tpnt1; - }; +#ifdef __SUPPORT_LD_DEBUG__ + _dl_dprintf(_dl_debug_file, "Looking for needed libraries\n"); +#endif + for (tcurr = tpnt; tcurr; tcurr = tcurr->next) + { + Elf32_Dyn *dpnt; + char *lpntstr; + for (dpnt = (Elf32_Dyn *) tcurr->dynamic_addr; dpnt->d_tag; dpnt++) { + if (dpnt->d_tag == DT_NEEDED) { + lpntstr = (char*)tcurr->loadaddr + tcurr->dynamic_info[DT_STRTAB] + + dpnt->d_un.d_val; + + /* Skip over any initial initial './' and '/' stuff to + * get the short form libname with no path garbage */ + libname1 = lpntstr; + ptr = _dl_strrchr(libname1, '/'); + if (ptr) { + libname1 = ptr + 1; + } + + /* Linked with glibc? */ + if (_dl_strcmp(libname1, "libc.so.6") == 0) { + _dl_dprintf(2, "\tERROR: %s is linked with GNU libc!\n", + tcurr->libname); + goto oops; + } + +#if 0 + { + struct elf_resolve *tpnt2; + /* Weed out duplicates early to avoid function aliasing */ + for (tpnt2 = _dl_loaded_modules; tpnt2; tpnt2 = tpnt2->next) { + /* Skip over any initial initial './' and '/' stuff to + * get the short form libname with no path garbage */ + libname2 = tpnt2->libname; + ptr = _dl_strrchr(libname2, '/'); + if (ptr) { + libname2 = ptr + 1; + } + + if (_dl_strcmp(libname1, libname2) == 0) { + /* Well, that was certainly easy */ +#ifdef __SUPPORT_LD_DEBUG__ + _dl_dprintf(_dl_debug_file, "\tLibrary '%s' needed by '%s' " + "already loaded\n", lpntstr, tcurr->libname); +#endif + continue; + } + } + } +#endif + +#ifdef __SUPPORT_LD_DEBUG__ + _dl_dprintf(_dl_debug_file, "Trying to load '%s', needed by '%s'\n", + lpntstr, tcurr->libname); +#endif + +#if 1 + + if (!(tpnt1 = _dl_load_shared_library(0, &rpnt, tcurr, lpntstr))) { + goto oops; + } +#else + if (!(tpnt1 = _dlopen(lpntstr, flag))) { + goto oops; + } +#endif + + rpnt->next = (struct dyn_elf *) malloc(sizeof(struct dyn_elf)); + _dl_memset (rpnt->next, 0, sizeof (struct dyn_elf)); + rpnt = rpnt->next; + if (!tpnt1->symbol_scope) tpnt1->symbol_scope = rpnt; + rpnt->dyn = tpnt1; + + } } - - tcurr = tcurr->next; - } while(tcurr); - } - + } + /* * OK, now attach the entire chain at the end */ - rpnt->next = _dl_symbol_tables; +#ifdef __mips__ /* - * MIPS is special *sigh* + * Relocation of the GOT entries for MIPS have to be done + * after all the libraries have been loaded. */ -#ifdef __mips__ _dl_perform_mips_global_got_relocations(tpnt); #endif - if (_dl_fixup(tpnt, (flag & RTLD_LAZY))) { - _dl_error_number = LD_NO_SYMBOL; +#ifdef __SUPPORT_LD_DEBUG__ + _dl_dprintf(_dl_debug_file, "Beginning dlopen 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 */ + if (_dl_fixup(dyn_chain->dyn, (flag & RTLD_LAZY))) goto oops; + +#ifdef __SUPPORT_LD_DEBUG__ + _dl_dprintf(_dl_debug_file, "Beginning dlopen copy fixups\n"); +#endif + if (_dl_symbol_tables) { + if (_dl_copy_fixups(dyn_chain)) + goto oops; } + + /* TODO: Should we set the protections of all pages back to R/O now ? */ + + + /* Notify the debugger we have added some objects. */ + _dl_debug_addr->r_state = RT_ADD; if (_dl_debug_addr) { - dl_brk = (void (*)(void)) _dl_debug_addr->r_brk; - if (dl_brk != NULL) { - _dl_debug_addr->r_state = RT_ADD; - (*dl_brk) (); + dl_brk = (void (*)(void)) _dl_debug_addr->r_brk; + if (dl_brk != NULL) { + _dl_debug_addr->r_state = RT_ADD; + (*dl_brk) (); - _dl_debug_addr->r_state = RT_CONSISTENT; - (*dl_brk) (); - } + _dl_debug_addr->r_state = RT_CONSISTENT; + (*dl_brk) (); + } } +#if 1 +#ifdef __SUPPORT_LD_DEBUG__ + _dlinfo(); +#endif +#endif + #ifdef __PIC__ - /* Find the last library */ - for (tpnt = dyn_chain->dyn; tpnt->next!=NULL; tpnt = tpnt->next) - ; + /* Find the last library so we can run things in the right order */ + for (rpnt = _dl_symbol_tables; rpnt!=NULL&& rpnt->next!=NULL; rpnt=rpnt->next) + ; + /* Run the ctors and set up the dtors */ - for (; tpnt != dyn_chain->dyn->prev; tpnt=tpnt->prev) + for (;rpnt!=NULL; rpnt=rpnt->prev) { /* Apparently crt1 for the application is responsible for handling this. * We only need to run the init/fini for shared libraries */ + tpnt = rpnt->dyn; if (tpnt->libtype == program_interpreter) continue; if (tpnt->libtype == elf_executable) @@ -270,26 +370,32 @@ void *_dlopen(const char *libname, int flag) tpnt->init_flag |= INIT_FUNCS_CALLED; if (tpnt->dynamic_info[DT_INIT]) { - dl_elf_init = (int (*)(void)) (tpnt->loadaddr + tpnt->dynamic_info[DT_INIT]); - (*dl_elf_init) (); + void (*dl_elf_func) (void); + dl_elf_func = (void (*)(void)) (tpnt->loadaddr + tpnt->dynamic_info[DT_INIT]); + if (dl_elf_func && *dl_elf_func != NULL) { +#ifdef __SUPPORT_LD_DEBUG__ + _dl_dprintf(2, "running ctors for library %s at '%x'\n", tpnt->libname, dl_elf_func); +#endif + (*dl_elf_func) (); + } } if (tpnt->dynamic_info[DT_FINI]) { - atexit((void (*)(void)) (tpnt->loadaddr + tpnt->dynamic_info[DT_FINI])); + void (*dl_elf_func) (void); + dl_elf_func = (void (*)(void)) (tpnt->loadaddr + tpnt->dynamic_info[DT_FINI]); + if (dl_elf_func && *dl_elf_func != NULL) { +#ifdef __SUPPORT_LD_DEBUG__ + _dl_dprintf(2, "setting up dtors for library %s at '%x'\n", tpnt->libname, dl_elf_func); +#endif + atexit(dl_elf_func); + } } - } #endif - -#ifdef USE_CACHE - _dl_unmap_cache(); -#endif return (void *) dyn_chain; - oops: +oops: /* Something went wrong. Clean up and return NULL. */ -#ifdef USE_CACHE _dl_unmap_cache(); -#endif do_dlclose(dyn_chain, 0); return NULL; } @@ -298,7 +404,7 @@ void *_dlsym(void *vhandle, const char *name) { struct elf_resolve *tpnt, *tfrom; struct dyn_elf *handle; - char *from; + ElfW(Addr) from; struct dyn_elf *rpnt; void *ret; @@ -325,7 +431,7 @@ void *_dlsym(void *vhandle, const char *name) * dynamic loader itself, as it doesn't know * how to properly treat it. */ - from = __builtin_return_address(0); + from = (ElfW(Addr)) __builtin_return_address(0); tfrom = NULL; for (rpnt = _dl_symbol_tables; rpnt; rpnt = rpnt->next) { @@ -442,7 +548,7 @@ static int do_dlclose(void *vhandle, int need_fini) if (end < ppnt->p_vaddr + ppnt->p_memsz) end = ppnt->p_vaddr + ppnt->p_memsz; } - _dl_munmap(rpnt->dyn->loadaddr, end); + _dl_munmap((void*)rpnt->dyn->loadaddr, end); /* Next, remove rpnt->dyn from the loaded_module list */ if (_dl_loaded_modules == rpnt->dyn) { _dl_loaded_modules = rpnt->dyn->next; @@ -527,9 +633,7 @@ 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 @@ -537,7 +641,7 @@ int _dladdr(void *__address, Dl_info * __dlip) pelf = NULL; #if 0 - _dl_dprintf(2, "dladdr( 0x%p, 0x%p )\n", __address, __dlip); + _dl_dprintf(2, "dladdr( %x, %x )\n", __address, __dlip); #endif for (rpnt = _dl_loaded_modules; rpnt; rpnt = rpnt->next) { @@ -545,10 +649,10 @@ int _dladdr(void *__address, Dl_info * __dlip) tpnt = rpnt; #if 0 - _dl_dprintf(2, "Module \"%s\" at 0x%p\n", + _dl_dprintf(2, "Module \"%s\" at %x\n", tpnt->libname, tpnt->loadaddr); #endif - if (tpnt->loadaddr < (char *) __address + if (tpnt->loadaddr < (ElfW(Addr)) __address && (pelf == NULL || pelf->loadaddr < tpnt->loadaddr)) { pelf = tpnt; } @@ -568,24 +672,25 @@ int _dladdr(void *__address, Dl_info * __dlip) int hn, si; int sf; int sn = 0; - void *sa = 0; + ElfW(Addr) sa; + 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; + ElfW(Addr) symbol_addr; symbol_addr = pelf->loadaddr + symtab[si].st_value; - if (symbol_addr <= __address && (!sf || sa < symbol_addr)) { + if (symbol_addr <= (ElfW(Addr))__address && (!sf || sa < symbol_addr)) { sa = symbol_addr; sn = si; sf = 1; } #if 0 - _dl_dprintf(2, "Symbol \"%s\" at 0x%p\n", + _dl_dprintf(2, "Symbol \"%s\" at %x\n", strtab + symtab[si].st_name, symbol_addr); #endif } @@ -593,9 +698,9 @@ int _dladdr(void *__address, Dl_info * __dlip) if (sf) { __dlip->dli_fname = pelf->libname; - __dlip->dli_fbase = pelf->loadaddr; + __dlip->dli_fbase = (void *)pelf->loadaddr; __dlip->dli_sname = strtab + symtab[sn].st_name; - __dlip->dli_saddr = sa; + __dlip->dli_saddr = (void *)sa; } return 1; } diff --git a/ldso/libdl/libdl.c b/ldso/libdl/libdl.c index a15518230..9ca624962 100644 --- a/ldso/libdl/libdl.c +++ b/ldso/libdl/libdl.c @@ -13,6 +13,7 @@ int dlclose(void *) __attribute__ ((__weak__, __alias__ ("_dlclose"))); void *dlsym(void *, const char *) __attribute__ ((__weak__, __alias__ ("_dlsym"))); const char *dlerror(void) __attribute__ ((__weak__, __alias__ ("_dlerror"))); int dladdr(void *, Dl_info *) __attribute__ ((__weak__, __alias__ ("_dladdr"))); +void _dlinfo(void); #ifdef __PIC__ @@ -121,16 +122,14 @@ static void __attribute__ ((destructor)) dl_cleanup(void) void *_dlopen(const char *libname, int flag) { - struct elf_resolve *tpnt, *tfrom; - struct dyn_elf *rpnt = NULL; - struct dyn_elf *dyn_chain; + struct elf_resolve *tpnt, *tfrom, *tcurr; + struct dyn_elf *dyn_chain, *rpnt = NULL; struct dyn_elf *dpnt; static int dl_init = 0; - char *from; + ElfW(Addr) from; + const char *libname1, *libname2, *ptr; + struct elf_resolve *tpnt1; void (*dl_brk) (void); -#ifdef __PIC__ - int (*dl_elf_init) (void); -#endif /* A bit of sanity checking... */ if (!(flag & (RTLD_LAZY|RTLD_NOW))) { @@ -138,7 +137,7 @@ void *_dlopen(const char *libname, int flag) return NULL; } - from = __builtin_return_address(0); + from = (ElfW(Addr)) __builtin_return_address(0); /* Have the dynamic linker use the regular malloc function now */ if (!dl_init) { @@ -150,9 +149,7 @@ void *_dlopen(const char *libname, int flag) if (!libname) return _dl_symbol_tables; -#ifdef USE_CACHE _dl_map_cache(); -#endif /* * Try and locate the module we were called from - we @@ -166,101 +163,204 @@ void *_dlopen(const char *libname, int flag) for (dpnt = _dl_symbol_tables; dpnt; dpnt = dpnt->next) { tpnt = dpnt->dyn; if (tpnt->loadaddr < from - && (tfrom == NULL || tfrom->loadaddr < tpnt->loadaddr)) + && (tfrom == NULL || tfrom->loadaddr < tpnt->loadaddr)) tfrom = tpnt; } + /* Skip over any initial initial './' and '/' stuff to + * get the short form libname with no path garbage */ + libname1 = libname; + ptr = _dl_strrchr(libname1, '/'); + if (ptr) { + libname1 = ptr + 1; + } + + + /* Weed out duplicates early to avoid function aliasing */ + for (tpnt1 = _dl_loaded_modules; tpnt1; tpnt1 = tpnt1->next) { + /* Skip over any initial initial './' and '/' stuff to + * get the short form libname with no path garbage */ + libname2 = tpnt1->libname; + ptr = _dl_strrchr(libname2, '/'); + if (ptr) { + libname2 = ptr + 1; + } + + if (_dl_strcmp(libname1, libname2) == 0) { + /* Well, that was certainly easy */ + return tpnt1; + } + } + + + + /* Try to load the specified library */ +#ifdef __SUPPORT_LD_DEBUG__ + _dl_dprintf(_dl_debug_file, "Trying to dlopen '%s'\n", (char*)libname); +#endif if (!(tpnt = _dl_load_shared_library(0, &rpnt, tfrom, (char*)libname))) { -#ifdef USE_CACHE _dl_unmap_cache(); -#endif return NULL; } //tpnt->libtype = loaded_file; - dyn_chain = rpnt = (struct dyn_elf *) malloc(sizeof(struct dyn_elf)); - _dl_memset(rpnt, 0, sizeof(struct dyn_elf)); - rpnt->dyn = tpnt; - rpnt->flags = flag; + + dyn_chain = (struct dyn_elf *) malloc(sizeof(struct dyn_elf)); + _dl_memset(dyn_chain, 0, sizeof(struct dyn_elf)); + dyn_chain->dyn = tpnt; + dyn_chain->flags = flag; if (!tpnt->symbol_scope) tpnt->symbol_scope = dyn_chain; - rpnt->next_handle = _dl_handles; - _dl_handles = rpnt; + dyn_chain->next_handle = _dl_handles; + _dl_handles = rpnt = dyn_chain; - /* - * OK, we have the requested file in memory. Now check for - * any other requested files that may also be required. - */ - { - struct elf_resolve *tcurr; - struct elf_resolve * tpnt1; - Elf32_Dyn * dpnt; - char * lpnt; - - tcurr = tpnt; - do{ - for(dpnt = (Elf32_Dyn *) tcurr->dynamic_addr; dpnt->d_tag; dpnt++) - { - - if(dpnt->d_tag == DT_NEEDED) - { - lpnt = tcurr->loadaddr + tcurr->dynamic_info[DT_STRTAB] + - dpnt->d_un.d_val; - if(!(tpnt1 = _dl_load_shared_library(0, &rpnt, tcurr, lpnt))) - goto oops; - rpnt->next = (struct dyn_elf *) malloc(sizeof(struct dyn_elf)); - _dl_memset (rpnt->next, 0, sizeof (struct dyn_elf)); - rpnt = rpnt->next; - if (!tpnt1->symbol_scope) tpnt1->symbol_scope = dyn_chain; - rpnt->dyn = tpnt1; - }; +#ifdef __SUPPORT_LD_DEBUG__ + _dl_dprintf(_dl_debug_file, "Looking for needed libraries\n"); +#endif + for (tcurr = tpnt; tcurr; tcurr = tcurr->next) + { + Elf32_Dyn *dpnt; + char *lpntstr; + for (dpnt = (Elf32_Dyn *) tcurr->dynamic_addr; dpnt->d_tag; dpnt++) { + if (dpnt->d_tag == DT_NEEDED) { + lpntstr = (char*)tcurr->loadaddr + tcurr->dynamic_info[DT_STRTAB] + + dpnt->d_un.d_val; + + /* Skip over any initial initial './' and '/' stuff to + * get the short form libname with no path garbage */ + libname1 = lpntstr; + ptr = _dl_strrchr(libname1, '/'); + if (ptr) { + libname1 = ptr + 1; + } + + /* Linked with glibc? */ + if (_dl_strcmp(libname1, "libc.so.6") == 0) { + _dl_dprintf(2, "\tERROR: %s is linked with GNU libc!\n", + tcurr->libname); + goto oops; + } + +#if 0 + { + struct elf_resolve *tpnt2; + /* Weed out duplicates early to avoid function aliasing */ + for (tpnt2 = _dl_loaded_modules; tpnt2; tpnt2 = tpnt2->next) { + /* Skip over any initial initial './' and '/' stuff to + * get the short form libname with no path garbage */ + libname2 = tpnt2->libname; + ptr = _dl_strrchr(libname2, '/'); + if (ptr) { + libname2 = ptr + 1; + } + + if (_dl_strcmp(libname1, libname2) == 0) { + /* Well, that was certainly easy */ +#ifdef __SUPPORT_LD_DEBUG__ + _dl_dprintf(_dl_debug_file, "\tLibrary '%s' needed by '%s' " + "already loaded\n", lpntstr, tcurr->libname); +#endif + continue; + } + } + } +#endif + +#ifdef __SUPPORT_LD_DEBUG__ + _dl_dprintf(_dl_debug_file, "Trying to load '%s', needed by '%s'\n", + lpntstr, tcurr->libname); +#endif + +#if 1 + + if (!(tpnt1 = _dl_load_shared_library(0, &rpnt, tcurr, lpntstr))) { + goto oops; + } +#else + if (!(tpnt1 = _dlopen(lpntstr, flag))) { + goto oops; + } +#endif + + rpnt->next = (struct dyn_elf *) malloc(sizeof(struct dyn_elf)); + _dl_memset (rpnt->next, 0, sizeof (struct dyn_elf)); + rpnt = rpnt->next; + if (!tpnt1->symbol_scope) tpnt1->symbol_scope = rpnt; + rpnt->dyn = tpnt1; + + } } - - tcurr = tcurr->next; - } while(tcurr); - } - + } + /* * OK, now attach the entire chain at the end */ - rpnt->next = _dl_symbol_tables; +#ifdef __mips__ /* - * MIPS is special *sigh* + * Relocation of the GOT entries for MIPS have to be done + * after all the libraries have been loaded. */ -#ifdef __mips__ _dl_perform_mips_global_got_relocations(tpnt); #endif - if (_dl_fixup(tpnt, (flag & RTLD_LAZY))) { - _dl_error_number = LD_NO_SYMBOL; +#ifdef __SUPPORT_LD_DEBUG__ + _dl_dprintf(_dl_debug_file, "Beginning dlopen 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 */ + if (_dl_fixup(dyn_chain->dyn, (flag & RTLD_LAZY))) goto oops; + +#ifdef __SUPPORT_LD_DEBUG__ + _dl_dprintf(_dl_debug_file, "Beginning dlopen copy fixups\n"); +#endif + if (_dl_symbol_tables) { + if (_dl_copy_fixups(dyn_chain)) + goto oops; } + + /* TODO: Should we set the protections of all pages back to R/O now ? */ + + + /* Notify the debugger we have added some objects. */ + _dl_debug_addr->r_state = RT_ADD; if (_dl_debug_addr) { - dl_brk = (void (*)(void)) _dl_debug_addr->r_brk; - if (dl_brk != NULL) { - _dl_debug_addr->r_state = RT_ADD; - (*dl_brk) (); + dl_brk = (void (*)(void)) _dl_debug_addr->r_brk; + if (dl_brk != NULL) { + _dl_debug_addr->r_state = RT_ADD; + (*dl_brk) (); - _dl_debug_addr->r_state = RT_CONSISTENT; - (*dl_brk) (); - } + _dl_debug_addr->r_state = RT_CONSISTENT; + (*dl_brk) (); + } } +#if 1 +#ifdef __SUPPORT_LD_DEBUG__ + _dlinfo(); +#endif +#endif + #ifdef __PIC__ - /* Find the last library */ - for (tpnt = dyn_chain->dyn; tpnt->next!=NULL; tpnt = tpnt->next) - ; + /* Find the last library so we can run things in the right order */ + for (rpnt = _dl_symbol_tables; rpnt!=NULL&& rpnt->next!=NULL; rpnt=rpnt->next) + ; + /* Run the ctors and set up the dtors */ - for (; tpnt != dyn_chain->dyn->prev; tpnt=tpnt->prev) + for (;rpnt!=NULL; rpnt=rpnt->prev) { /* Apparently crt1 for the application is responsible for handling this. * We only need to run the init/fini for shared libraries */ + tpnt = rpnt->dyn; if (tpnt->libtype == program_interpreter) continue; if (tpnt->libtype == elf_executable) @@ -270,26 +370,32 @@ void *_dlopen(const char *libname, int flag) tpnt->init_flag |= INIT_FUNCS_CALLED; if (tpnt->dynamic_info[DT_INIT]) { - dl_elf_init = (int (*)(void)) (tpnt->loadaddr + tpnt->dynamic_info[DT_INIT]); - (*dl_elf_init) (); + void (*dl_elf_func) (void); + dl_elf_func = (void (*)(void)) (tpnt->loadaddr + tpnt->dynamic_info[DT_INIT]); + if (dl_elf_func && *dl_elf_func != NULL) { +#ifdef __SUPPORT_LD_DEBUG__ + _dl_dprintf(2, "running ctors for library %s at '%x'\n", tpnt->libname, dl_elf_func); +#endif + (*dl_elf_func) (); + } } if (tpnt->dynamic_info[DT_FINI]) { - atexit((void (*)(void)) (tpnt->loadaddr + tpnt->dynamic_info[DT_FINI])); + void (*dl_elf_func) (void); + dl_elf_func = (void (*)(void)) (tpnt->loadaddr + tpnt->dynamic_info[DT_FINI]); + if (dl_elf_func && *dl_elf_func != NULL) { +#ifdef __SUPPORT_LD_DEBUG__ + _dl_dprintf(2, "setting up dtors for library %s at '%x'\n", tpnt->libname, dl_elf_func); +#endif + atexit(dl_elf_func); + } } - } #endif - -#ifdef USE_CACHE - _dl_unmap_cache(); -#endif return (void *) dyn_chain; - oops: +oops: /* Something went wrong. Clean up and return NULL. */ -#ifdef USE_CACHE _dl_unmap_cache(); -#endif do_dlclose(dyn_chain, 0); return NULL; } @@ -298,7 +404,7 @@ void *_dlsym(void *vhandle, const char *name) { struct elf_resolve *tpnt, *tfrom; struct dyn_elf *handle; - char *from; + ElfW(Addr) from; struct dyn_elf *rpnt; void *ret; @@ -325,7 +431,7 @@ void *_dlsym(void *vhandle, const char *name) * dynamic loader itself, as it doesn't know * how to properly treat it. */ - from = __builtin_return_address(0); + from = (ElfW(Addr)) __builtin_return_address(0); tfrom = NULL; for (rpnt = _dl_symbol_tables; rpnt; rpnt = rpnt->next) { @@ -442,7 +548,7 @@ static int do_dlclose(void *vhandle, int need_fini) if (end < ppnt->p_vaddr + ppnt->p_memsz) end = ppnt->p_vaddr + ppnt->p_memsz; } - _dl_munmap(rpnt->dyn->loadaddr, end); + _dl_munmap((void*)rpnt->dyn->loadaddr, end); /* Next, remove rpnt->dyn from the loaded_module list */ if (_dl_loaded_modules == rpnt->dyn) { _dl_loaded_modules = rpnt->dyn->next; @@ -527,9 +633,7 @@ 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 @@ -537,7 +641,7 @@ int _dladdr(void *__address, Dl_info * __dlip) pelf = NULL; #if 0 - _dl_dprintf(2, "dladdr( 0x%p, 0x%p )\n", __address, __dlip); + _dl_dprintf(2, "dladdr( %x, %x )\n", __address, __dlip); #endif for (rpnt = _dl_loaded_modules; rpnt; rpnt = rpnt->next) { @@ -545,10 +649,10 @@ int _dladdr(void *__address, Dl_info * __dlip) tpnt = rpnt; #if 0 - _dl_dprintf(2, "Module \"%s\" at 0x%p\n", + _dl_dprintf(2, "Module \"%s\" at %x\n", tpnt->libname, tpnt->loadaddr); #endif - if (tpnt->loadaddr < (char *) __address + if (tpnt->loadaddr < (ElfW(Addr)) __address && (pelf == NULL || pelf->loadaddr < tpnt->loadaddr)) { pelf = tpnt; } @@ -568,24 +672,25 @@ int _dladdr(void *__address, Dl_info * __dlip) int hn, si; int sf; int sn = 0; - void *sa = 0; + ElfW(Addr) sa; + 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; + ElfW(Addr) symbol_addr; symbol_addr = pelf->loadaddr + symtab[si].st_value; - if (symbol_addr <= __address && (!sf || sa < symbol_addr)) { + if (symbol_addr <= (ElfW(Addr))__address && (!sf || sa < symbol_addr)) { sa = symbol_addr; sn = si; sf = 1; } #if 0 - _dl_dprintf(2, "Symbol \"%s\" at 0x%p\n", + _dl_dprintf(2, "Symbol \"%s\" at %x\n", strtab + symtab[si].st_name, symbol_addr); #endif } @@ -593,9 +698,9 @@ int _dladdr(void *__address, Dl_info * __dlip) if (sf) { __dlip->dli_fname = pelf->libname; - __dlip->dli_fbase = pelf->loadaddr; + __dlip->dli_fbase = (void *)pelf->loadaddr; __dlip->dli_sname = strtab + symtab[sn].st_name; - __dlip->dli_saddr = sa; + __dlip->dli_saddr = (void *)sa; } return 1; } |