Bug 3433 - FDPIC Crash / ELF_RTYPE_CLASS_DLSYM missing in dlsym()
Summary: FDPIC Crash / ELF_RTYPE_CLASS_DLSYM missing in dlsym()
Status: RESOLVED FIXED
Alias: None
Product: uClibc
Classification: Unclassified
Component: Shared Library Support (show other bugs)
Version: 0.9.32
Hardware: Other Linux
: P5 major
Target Milestone: ---
Assignee: unassigned
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2011-03-07 22:11 UTC by mbm
Modified: 2011-06-14 15:01 UTC (History)
1 user (show)

See Also:
Host:
Target:
Build:

Attachments
patch to add ELF_RTYPE_CLASS_DLSYM (532 bytes, patch)
2011-03-07 22:11 UTC, mbm 		Details
Add an attachment (proposed patch, testcase, etc.)

Note You need to log in before you can comment on or make changes to this bug.
Description mbm 2011-03-07 22:11:50 UTC 
Created attachment 3121 [details]
patch to add ELF_RTYPE_CLASS_DLSYM

On FDPIC platforms, functions are passed by function descriptor, not by pointers. If you don't specify ELF_RTYPE_CLASS_DLSYM when calling _dl_find_hash() the return value from dlsym() will be a pointer not a function descriptor, crashing the program.

The bug was introduced when TLS support was added in 534661b91c98492995274c364c8177c45efc63db
Comment 1 Bernhard Reutner-Fischer 2011-06-14 15:01:06 UTC 
Hi,

Thanks.

Please note that a Signed-off-by line was missing!
Please see http://uclibc.org/developing.html#contrib