From: Rich Felker <dalias@aerifal.cx>
Date: Mon, 27 Jun 2011 01:21:04 +0000 (-0400)
Subject: fix resolving symbols in objects loaded in RTLD_LOCAL mode
X-Git-Url: http://nsz.repo.hu/git/?p=musl;a=commitdiff_plain;h=92ab5d8d156545ab0daff6062d7a519861684fb6

fix resolving symbols in objects loaded in RTLD_LOCAL mode

basically we temporarily make the library and all its dependencies
part of the global namespace but only for the duration of performing
relocations, then return them to their former state.
---

diff --git a/src/ldso/dynlink.c b/src/ldso/dynlink.c
index 35ff9626..305d70e0 100644
--- a/src/ldso/dynlink.c
+++ b/src/ldso/dynlink.c
@@ -493,6 +493,9 @@ void *dlopen(const char *file, int mode)
 
 	if (setjmp(rtld_fail)) {
 		/* Clean up anything new that was (partially) loaded */
+		if (p->deps) for (i=0; p->deps[i]; i++)
+			if (p->deps[i]->global < 0)
+				p->deps[i]->global = 0;
 		for (p=orig_tail->next; p; p=next) {
 			next = p->next;
 			munmap(p->map, p->map_len);
@@ -511,7 +514,15 @@ void *dlopen(const char *file, int mode)
 	/* First load handling */
 	if (!p->deps) {
 		load_deps(p);
+		for (i=0; p->deps[i]; i++)
+			if (!p->deps[i]->global)
+				p->deps[i]->global = -1;
+		if (!p->global) p->global = -1;
 		reloc_all(p);
+		for (i=0; p->deps[i]; i++)
+			if (p->deps[i]->global < 0)
+				p->deps[i]->global = 0;
+		if (p->global < 0) p->global = 0;
 	}
 
 	if (mode & RTLD_GLOBAL) {