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author | sjg <sjg@FreeBSD.org> | 2013-10-13 02:35:19 +0000 |
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committer | sjg <sjg@FreeBSD.org> | 2013-10-13 02:35:19 +0000 |
commit | 7fcd33c1faf567506b5c0b4148c7a15a10788a5d (patch) | |
tree | 2c6f4d1ca5d1c643faea64e1f4c90105a1ab406a /libexec | |
parent | 2a59274eda20cc626e28052fff7aa8b7bf6a3683 (diff) | |
parent | 5cca672bb0892f1c5da630c34a1f98e2de4d7064 (diff) | |
download | FreeBSD-src-7fcd33c1faf567506b5c0b4148c7a15a10788a5d.zip FreeBSD-src-7fcd33c1faf567506b5c0b4148c7a15a10788a5d.tar.gz |
Merge head@256284
Diffstat (limited to 'libexec')
-rw-r--r-- | libexec/rtld-elf/libmap.c | 2 | ||||
-rw-r--r-- | libexec/rtld-elf/libmap.h | 2 | ||||
-rw-r--r-- | libexec/rtld-elf/rtld.c | 50 | ||||
-rw-r--r-- | libexec/rtld-elf/rtld.h | 1 |
4 files changed, 39 insertions, 16 deletions
diff --git a/libexec/rtld-elf/libmap.c b/libexec/rtld-elf/libmap.c index 29dc538..2e1f3c6 100644 --- a/libexec/rtld-elf/libmap.c +++ b/libexec/rtld-elf/libmap.c @@ -396,7 +396,6 @@ lm_find (const char *p, const char *f) /* Given a libmap translation list and a library name, return the replacement library, or NULL */ -#ifdef COMPAT_32BIT char * lm_findn (const char *p, const char *f, const int n) { @@ -413,7 +412,6 @@ lm_findn (const char *p, const char *f, const int n) free(s); return (t); } -#endif static char * lml_find (struct lm_list *lmh, const char *f) diff --git a/libexec/rtld-elf/libmap.h b/libexec/rtld-elf/libmap.h index 53b2ba1..54b4a2f 100644 --- a/libexec/rtld-elf/libmap.h +++ b/libexec/rtld-elf/libmap.h @@ -5,6 +5,4 @@ int lm_init (char *); void lm_fini (void); char * lm_find (const char *, const char *); -#ifdef COMPAT_32BIT char * lm_findn (const char *, const char *, const int); -#endif diff --git a/libexec/rtld-elf/rtld.c b/libexec/rtld-elf/rtld.c index 2da990c..fa6dc2a 100644 --- a/libexec/rtld-elf/rtld.c +++ b/libexec/rtld-elf/rtld.c @@ -116,6 +116,7 @@ static Objlist_Entry *objlist_find(Objlist *, const Obj_Entry *); static void objlist_init(Objlist *); static void objlist_push_head(Objlist *, Obj_Entry *); static void objlist_push_tail(Objlist *, Obj_Entry *); +static void objlist_put_after(Objlist *, Obj_Entry *, Obj_Entry *); static void objlist_remove(Objlist *, Obj_Entry *); static void *path_enumerate(const char *, path_enum_proc, void *); static int relocate_object_dag(Obj_Entry *root, bool bind_now, @@ -323,6 +324,7 @@ _rtld(Elf_Addr *sp, func_ptr_type *exit_proc, Obj_Entry **objp) Objlist_Entry *entry; Obj_Entry *obj; Obj_Entry **preload_tail; + Obj_Entry *last_interposer; Objlist initlist; RtldLockState lockstate; char *library_path_rpath; @@ -537,8 +539,14 @@ _rtld(Elf_Addr *sp, func_ptr_type *exit_proc, Obj_Entry **objp) die(); /* Make a list of all objects loaded at startup. */ + last_interposer = obj_main; for (obj = obj_list; obj != NULL; obj = obj->next) { - objlist_push_tail(&list_main, obj); + if (obj->z_interpose && obj != obj_main) { + objlist_put_after(&list_main, last_interposer, obj); + last_interposer = obj; + } else { + objlist_push_tail(&list_main, obj); + } obj->refcount++; } @@ -1111,11 +1119,7 @@ digest_dynamic1(Obj_Entry *obj, int early, const Elf_Dyn **dyn_rpath, break; case DT_MIPS_RLD_MAP: -#ifdef notyet - if (!early) - dbg("Filling in DT_DEBUG entry"); - ((Elf_Dyn*)dynp)->d_un.d_ptr = (Elf_Addr) &r_debug; -#endif + *((Elf_Addr *)(dynp->d_un.d_ptr)) = (Elf_Addr) &r_debug; break; #endif @@ -1132,6 +1136,8 @@ digest_dynamic1(Obj_Entry *obj, int early, const Elf_Dyn **dyn_rpath, obj->z_nodelete = true; if (dynp->d_un.d_val & DF_1_LOADFLTR) obj->z_loadfltr = true; + if (dynp->d_un.d_val & DF_1_INTERPOSE) + obj->z_interpose = true; if (dynp->d_un.d_val & DF_1_NODEFLIB) obj->z_nodeflib = true; break; @@ -1980,6 +1986,7 @@ static int load_preload_objects(void) { char *p = ld_preload; + Obj_Entry *obj; static const char delim[] = " \t:;"; if (p == NULL) @@ -1992,8 +1999,10 @@ load_preload_objects(void) savech = p[len]; p[len] = '\0'; - if (load_object(p, -1, NULL, 0) == NULL) + obj = load_object(p, -1, NULL, 0); + if (obj == NULL) return -1; /* XXX - cleanup */ + obj->z_interpose = true; p[len] = savech; p += len; p += strspn(p, delim); @@ -2382,6 +2391,23 @@ objlist_push_tail(Objlist *list, Obj_Entry *obj) } static void +objlist_put_after(Objlist *list, Obj_Entry *listobj, Obj_Entry *obj) +{ + Objlist_Entry *elm, *listelm; + + STAILQ_FOREACH(listelm, list, link) { + if (listelm->obj == listobj) + break; + } + elm = NEW(Objlist_Entry); + elm->obj = obj; + if (listelm != NULL) + STAILQ_INSERT_AFTER(list, listelm, elm, link); + else + STAILQ_INSERT_TAIL(list, elm, link); +} + +static void objlist_remove(Objlist *list, Obj_Entry *obj) { Objlist_Entry *elm; @@ -2581,12 +2607,14 @@ rtld_exit(void) lock_release(rtld_bind_lock, &lockstate); } +/* + * Iterate over a search path, translate each element, and invoke the + * callback on the result. + */ static void * path_enumerate(const char *path, path_enum_proc callback, void *arg) { -#ifdef COMPAT_32BIT const char *trans; -#endif if (path == NULL) return (NULL); @@ -2596,13 +2624,11 @@ path_enumerate(const char *path, path_enum_proc callback, void *arg) char *res; len = strcspn(path, ":;"); -#ifdef COMPAT_32BIT trans = lm_findn(NULL, path, len); if (trans) res = callback(trans, strlen(trans), arg); else -#endif - res = callback(path, len, arg); + res = callback(path, len, arg); if (res != NULL) return (res); diff --git a/libexec/rtld-elf/rtld.h b/libexec/rtld-elf/rtld.h index 0aba7cd..083f5a4 100644 --- a/libexec/rtld-elf/rtld.h +++ b/libexec/rtld-elf/rtld.h @@ -259,6 +259,7 @@ typedef struct Struct_Obj_Entry { bool z_nodelete : 1; /* Do not unload the object and dependencies */ bool z_noopen : 1; /* Do not load on dlopen */ bool z_loadfltr : 1; /* Immediately load filtees */ + bool z_interpose : 1; /* Interpose all objects but main */ bool z_nodeflib : 1; /* Don't search default library path */ bool ref_nodel : 1; /* Refcount increased to prevent dlclose */ bool init_scanned: 1; /* Object is already on init list. */ |