X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;ds=sidebyside;f=src%2Fldso%2Fdynlink.c;h=e0013ec0eecfe698dd717135e79cb55b44214e78;hb=a9e85c0a5c690086c652f3a8ae9a109389f671a3;hp=eda0046e9e0ac4646972292a60071bab16be6dea;hpb=700a8156adc5bfb3ddf9c92dab4ffd516df31958;p=musl

diff --git a/src/ldso/dynlink.c b/src/ldso/dynlink.c
index eda0046e..e0013ec0 100644
--- a/src/ldso/dynlink.c
+++ b/src/ldso/dynlink.c
@@ -1,4 +1,3 @@
-#ifdef __PIC__
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -18,6 +17,10 @@
 #include <ctype.h>
 #include <dlfcn.h>
 
+static int errflag;
+
+#ifdef __PIC__
+
 #include "reloc.h"
 
 #if ULONG_MAX == 0xffffffff
@@ -610,9 +613,11 @@ void *dlopen(const char *file, int mode)
 {
 	struct dso *volatile p, *orig_tail = tail, *next;
 	size_t i;
+	int cs;
 
 	if (!file) return head;
 
+	pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &cs);
 	pthread_rwlock_wrlock(&lock);
 
 	if (setjmp(rtld_fail)) {
@@ -628,12 +633,13 @@ void *dlopen(const char *file, int mode)
 		}
 		tail = orig_tail;
 		tail->next = 0;
-		pthread_rwlock_unlock(&lock);
-		return 0;
-	}
+		p = 0;
+	} else p = load_library(file);
 
-	p = load_library(file);
-	if (!p) goto end;
+	if (!p) {
+		errflag = 1;
+		goto end;
+	}
 
 	/* First load handling */
 	if (!p->deps) {
@@ -658,6 +664,7 @@ void *dlopen(const char *file, int mode)
 	do_init_fini(tail);
 end:
 	pthread_rwlock_unlock(&lock);
+	pthread_setcancelstate(cs, 0);
 	return p;
 }
 
@@ -671,8 +678,11 @@ static void *do_dlsym(struct dso *p, const char *s, void *ra)
 		if (!p) p=head;
 		p=p->next;
 	}
-	if (p == head || p == RTLD_DEFAULT)
-		return find_sym(head, s, 0);
+	if (p == head || p == RTLD_DEFAULT) {
+		void *res = find_sym(head, s, 0);
+		if (!res) errflag = 1;
+		return res;
+	}
 	h = hash(s);
 	sym = lookup(s, h, p->syms, p->hashtab, p->strings);
 	if (sym && sym->st_value && (1<<(sym->st_info&0xf) & OK_TYPES))
@@ -683,6 +693,7 @@ static void *do_dlsym(struct dso *p, const char *s, void *ra)
 		if (sym && sym->st_value && (1<<(sym->st_info&0xf) & OK_TYPES))
 			return p->deps[i]->base + sym->st_value;
 	}
+	errflag = 1;
 	return 0;
 }
 
@@ -707,6 +718,8 @@ void *__dlsym(void *p, const char *s, void *ra)
 
 char *dlerror()
 {
+	if (!errflag) return 0;
+	errflag = 0;
 	return "unknown error";
 }