Date: Thu, 12 Aug 2010 09:51:27 GMT From: KT Sin <ktsin@acm.org> To: freebsd-gnats-submit@FreeBSD.org Subject: bin/149569: runtime linker unable to load needed object with the same name as referencing object Message-ID: <201008120951.o7C9pRdr079339@www.freebsd.org> Resent-Message-ID: <201008121000.o7CA09Vu077939@freefall.freebsd.org>
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>Number: 149569 >Category: bin >Synopsis: runtime linker unable to load needed object with the same name as referencing object >Confidential: no >Severity: non-critical >Priority: high >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Thu Aug 12 10:00:08 UTC 2010 >Closed-Date: >Last-Modified: >Originator: KT Sin >Release: 8.1-RELEASE >Organization: >Environment: FreeBSD passion.hsins.com 8.1-RELEASE FreeBSD 8.1-RELEASE #0: Mon Jul 19 14:05:18 MYT 2010 ktsin@passion.hsins.com:/tmp/obj/usr/src/sys/PASSION i386 >Description: starting from freebsd 7, the runtime linker is unable to load needed object having the same name as the referencing object even though the needed object's rpath is set. $ ldd ./libclntsh.so.9.0 ./libclntsh.so.9.0: libclntsh.so.9.0 => ./libclntsh.so.9.0 (0x881a8000) $ objdump -x ./libclntsh.so.9.0 | head -25 ./libclntsh.so.9.0: file format elf32-i386-freebsd ./libclntsh.so.9.0 architecture: i386, flags 0x00000150: HAS_SYMS, DYNAMIC, D_PAGED start address 0x00002700 Program Header: LOAD off 0x00000000 vaddr 0x00000000 paddr 0x00000000 align 2**12 filesz 0x00002d20 memsz 0x00002d20 flags r-x LOAD off 0x00002d20 vaddr 0x00003d20 paddr 0x00003d20 align 2**12 filesz 0x000000d8 memsz 0x000000fc flags rw- DYNAMIC off 0x00002d68 vaddr 0x00003d68 paddr 0x00003d68 align 2**2 filesz 0x00000090 memsz 0x00000090 flags rw- NOTE off 0x00002d08 vaddr 0x00002d08 paddr 0x00002d08 align 2**2 filesz 0x00000018 memsz 0x00000018 flags r-- Dynamic Section: NEEDED libclntsh.so.9.0 SONAME libclntsh.so.9.0 RPATH /usr/local/test/oracle/lib INIT 0x26b0 FINI 0x2d00 HASH 0xb4 STRTAB 0x153c >How-To-Repeat: >Fix: proposed fix is attached. after patching rtld.c and rebuilding ld-elf.so.1 : $ ldd ./libclntsh.so.9.0 ./libclntsh.so.9.0: libclntsh.so.9.0 => /usr/local/test/oracle/lib/libclntsh.so.9.0 (0x88300000) libwtc9.so => /usr/local/lib/libwtc9.so (0x881ac000) libm.so.2 => /usr/local/lib/libm.so.2 (0x881ae000) Patch attached with submission follows: --- libexec/rtld-elf/rtld.c.orig 2010-06-18 23:17:38.000000000 +0800 +++ libexec/rtld-elf/rtld.c 2010-08-12 16:16:43.000000000 +0800 @@ -1435,15 +1435,23 @@ Needed_Entry *needed; for (needed = obj->needed; needed != NULL; needed = needed->next) { - obj1 = needed->obj = load_object(obj->strtab + needed->name, obj, - flags & ~RTLD_LO_NOLOAD); - if (obj1 == NULL && !ld_tracing) + const char *name = obj->strtab + needed->name; + char *path = find_library(name, obj); + + if (path == NULL && !ld_tracing) return -1; - if (obj1 != NULL && obj1->z_nodelete && !obj1->ref_nodel) { - dbg("obj %s nodelete", obj1->path); - init_dag(obj1); - ref_dag(obj1); - obj1->ref_nodel = true; + + if (path) { + obj1 = needed->obj = load_object(path, obj, + flags & ~RTLD_LO_NOLOAD); + if (obj1 == NULL && !ld_tracing) + return -1; + if (obj1 != NULL && obj1->z_nodelete && !obj1->ref_nodel) { + dbg("obj %s nodelete", obj1->path); + init_dag(obj1); + ref_dag(obj1); + obj1->ref_nodel = true; + } } } } >Release-Note: >Audit-Trail: >Unformatted:
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