| Summary: | debuginfo not found because of unaligned CRC | ||
|---|---|---|---|
| Product: | [Developer tools] valgrind | Reporter: | John Reiser <jreiser> |
| Component: | general | Assignee: | Julian Seward <jseward> |
| Status: | RESOLVED FIXED | ||
| Severity: | normal | CC: | tom |
| Priority: | NOR | ||
| Version: | 3.7 SVN | ||
| Target Milestone: | --- | ||
| Platform: | Compiled Sources | ||
| OS: | Linux | ||
| Latest Commit: | Version Fixed In: | ||
Committed as r12081 and r12082. |
Version: 3.7 SVN (using Devel) OS: Linux Running "valgrind -v -v -d ..." on armv5tel, which garbles mis-aligned memory fetch, I see: --2939-- Considering /usr/lib/debug/lib/arm-linux-gnueabi/librt-2.13.so .. --2939-- .. CRC mismatch (computed 9ca1b344 wanted 0000b344) which obviously is a bug: the top 16 bits of a true match have been zeroed. The fix is: --- coregrind/m_debuginfo/readelf.c (revision 12072) /* Extract the CRC from the debuglink section */ - crc = *(UInt *)(debuglink_img + crc_offset); + crc = read_UInt(debuglink_img + crc_offset); and copy read_UInt() and host_is_little_endian() from readdwarf.c. Reproducible: Always Steps to Reproduce: Run "valgrind -v -v -d /bin/date" on armv5tel (sheevaplug, nslu2, ...). Actual Results: --2939-- Considering /usr/lib/debug/lib/arm-linux-gnueabi/librt-2.13.so .. --2939-- .. CRC mismatch (computed 9ca1b344 wanted 0000b344) Expected Results: No complaint. Similar to bug 282527, but that concentrates on DWARFn, while this is plain ELF.