Date: Mon, 4 May 2015 08:19:13 +0000 (UTC) From: Konstantin Belousov <kib@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-10@freebsd.org Subject: svn commit: r282412 - stable/10/libexec/rtld-elf Message-ID: <201505040819.t448JDtr055892@svn.freebsd.org>
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Author: kib Date: Mon May 4 08:19:12 2015 New Revision: 282412 URL: https://svnweb.freebsd.org/changeset/base/282412 Log: MFC r282109: Always do token substitution, do not require -z origin to do it. Modified: stable/10/libexec/rtld-elf/rtld.c Directory Properties: stable/10/ (props changed) Modified: stable/10/libexec/rtld-elf/rtld.c ============================================================================== --- stable/10/libexec/rtld-elf/rtld.c Mon May 4 08:16:32 2015 (r282411) +++ stable/10/libexec/rtld-elf/rtld.c Mon May 4 08:19:12 2015 (r282412) @@ -146,8 +146,10 @@ static void unlink_object(Obj_Entry *); static void unload_object(Obj_Entry *); static void unref_dag(Obj_Entry *); static void ref_dag(Obj_Entry *); -static char *origin_subst_one(char *, const char *, const char *, bool); -static char *origin_subst(char *, const char *); +static char *origin_subst_one(Obj_Entry *, char *, const char *, + const char *, bool); +static char *origin_subst(Obj_Entry *, char *); +static bool obj_resolve_origin(Obj_Entry *obj); static void preinit_main(void); static int rtld_verify_versions(const Objlist *); static int rtld_verify_object_versions(Obj_Entry *); @@ -779,8 +781,8 @@ basename(const char *name) static struct utsname uts; static char * -origin_subst_one(char *real, const char *kw, const char *subst, - bool may_free) +origin_subst_one(Obj_Entry *obj, char *real, const char *kw, + const char *subst, bool may_free) { char *p, *p1, *res, *resp; int subst_len, kw_len, subst_count, old_len, new_len; @@ -799,9 +801,15 @@ origin_subst_one(char *real, const char /* * If the keyword is not found, just return. + * + * Return non-substituted string if resolution failed. We + * cannot do anything more reasonable, the failure mode of the + * caller is unresolved library anyway. */ - if (subst_count == 0) + if (subst_count == 0 || (obj != NULL && !obj_resolve_origin(obj))) return (may_free ? real : xstrdup(real)); + if (obj != NULL) + subst = obj->origin_path; /* * There is indeed something to substitute. Calculate the @@ -838,20 +846,22 @@ origin_subst_one(char *real, const char } static char * -origin_subst(char *real, const char *origin_path) +origin_subst(Obj_Entry *obj, char *real) { char *res1, *res2, *res3, *res4; + if (obj == NULL || !trust) + return (xstrdup(real)); if (uts.sysname[0] == '\0') { if (uname(&uts) != 0) { _rtld_error("utsname failed: %d", errno); return (NULL); } } - res1 = origin_subst_one(real, "$ORIGIN", origin_path, false); - res2 = origin_subst_one(res1, "$OSNAME", uts.sysname, true); - res3 = origin_subst_one(res2, "$OSREL", uts.release, true); - res4 = origin_subst_one(res3, "$PLATFORM", uts.machine, true); + res1 = origin_subst_one(obj, real, "$ORIGIN", NULL, false); + res2 = origin_subst_one(NULL, res1, "$OSNAME", uts.sysname, true); + res3 = origin_subst_one(NULL, res2, "$OSREL", uts.release, true); + res4 = origin_subst_one(NULL, res3, "$PLATFORM", uts.machine, true); return (res4); } @@ -1115,7 +1125,7 @@ digest_dynamic1(Obj_Entry *obj, int earl #endif case DT_FLAGS: - if ((dynp->d_un.d_val & DF_ORIGIN) && trust) + if (dynp->d_un.d_val & DF_ORIGIN) obj->z_origin = true; if (dynp->d_un.d_val & DF_SYMBOLIC) obj->symbolic = true; @@ -1147,7 +1157,7 @@ digest_dynamic1(Obj_Entry *obj, int earl case DT_FLAGS_1: if (dynp->d_un.d_val & DF_1_NOOPEN) obj->z_noopen = true; - if ((dynp->d_un.d_val & DF_1_ORIGIN) && trust) + if (dynp->d_un.d_val & DF_1_ORIGIN) obj->z_origin = true; if (dynp->d_un.d_val & DF_1_GLOBAL) obj->z_global = true; @@ -1198,30 +1208,33 @@ digest_dynamic1(Obj_Entry *obj, int earl } } +static bool +obj_resolve_origin(Obj_Entry *obj) +{ + + if (obj->origin_path != NULL) + return (true); + obj->origin_path = xmalloc(PATH_MAX); + return (rtld_dirname_abs(obj->path, obj->origin_path) != -1); +} + static void digest_dynamic2(Obj_Entry *obj, const Elf_Dyn *dyn_rpath, const Elf_Dyn *dyn_soname, const Elf_Dyn *dyn_runpath) { - if (obj->z_origin && obj->origin_path == NULL) { - obj->origin_path = xmalloc(PATH_MAX); - if (rtld_dirname_abs(obj->path, obj->origin_path) == -1) - rtld_die(); - } - - if (dyn_runpath != NULL) { - obj->runpath = (char *)obj->strtab + dyn_runpath->d_un.d_val; - if (obj->z_origin) - obj->runpath = origin_subst(obj->runpath, obj->origin_path); - } - else if (dyn_rpath != NULL) { - obj->rpath = (char *)obj->strtab + dyn_rpath->d_un.d_val; - if (obj->z_origin) - obj->rpath = origin_subst(obj->rpath, obj->origin_path); - } + if (obj->z_origin && !obj_resolve_origin(obj)) + rtld_die(); - if (dyn_soname != NULL) - object_add_name(obj, obj->strtab + dyn_soname->d_un.d_val); + if (dyn_runpath != NULL) { + obj->runpath = (char *)obj->strtab + dyn_runpath->d_un.d_val; + obj->runpath = origin_subst(obj, obj->runpath); + } else if (dyn_rpath != NULL) { + obj->rpath = (char *)obj->strtab + dyn_rpath->d_un.d_val; + obj->rpath = origin_subst(obj, obj->rpath); + } + if (dyn_soname != NULL) + object_add_name(obj, obj->strtab + dyn_soname->d_un.d_val); } static void @@ -1466,12 +1479,8 @@ find_library(const char *xname, const Ob xname); return NULL; } - if (objgiven && refobj->z_origin) { - return (origin_subst(__DECONST(char *, xname), - refobj->origin_path)); - } else { - return (xstrdup(xname)); - } + return (origin_subst(__DECONST(Obj_Entry *, refobj), + __DECONST(char *, xname))); } if (libmap_disable || !objgiven ||
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