0005314: ldso fails for ELF relative search paths - BusyBox Bug and Patch Tracking

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Date Submitted

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0005314

[uClibc] Shared Library Support

feature

always

10-08-08 10:51

10-12-08 13:44

Reporter

chrisz

View Status

public

Assigned To

uClibc

Priority

normal

Resolution

open

Status

assigned

Product Version

Summary

0005314: ldso fails for ELF relative search paths

Description

I attempted to run an ELF binary with rpath set to $ORIGIN/../lib. ldso failed to correctly locate the shared library. Changing rpath to a complete path reference and relinking allowed the binary to run.

I checked the dl-elf.c file, and there does not appear to be support for $ORIGIN, $ISALIST, $OSNAME, $OSREL and $PLATFORM tokens. This leads to an incompatibility on some binaries which will run with glibc, but not with uClibc.

The condition can be dealt with by either relinking the binary with a hard coded path, or using the LD_LIBRARY_PATH variable to assist ld in locating the libraries. This is a minor feature which should be added to ldso for completeness, with a compile time flag if the feature is not desired.

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Notes
(0013294) carmelo73 10-11-08 23:29	Could provide an example of application that rely upon the $ORIGIN token ? Never seen one. Thanks.

(0013364) chrisz 10-12-08 02:35	Actually, in this case it was Perl compiled with the "relative paths" option, however, any application could make use of this in theory. I wouldn't call this a high priority problem, just something that needs to be added for completeness and consistency. Perl in this case was desired with relative paths, because it is big and I was putting it on a USB thumbdrive, and could not be sure where that would be mounted in the future.

(0013374) bernhardf 10-12-08 13:44	Can you please provide a small, simple, stand-alone testcase (that could theoretically be added to the testsuite) to reproduce this problem?

Issue History
Date Modified	Username	Field	Change
10-08-08 10:51	chrisz	New Issue
10-08-08 10:51	chrisz	Status	new => assigned
10-08-08 10:51	chrisz	Assigned To	=> uClibc
10-11-08 23:29	carmelo73	Note Added: 0013294
10-12-08 02:35	chrisz	Note Added: 0013364
10-12-08 13:44	bernhardf	Note Added: 0013374