[lldb-dev] [Bug 27256] New: lldb doesn't support powerpc64 ELFv1 function descriptors

via lldb-dev lldb-dev at lists.llvm.org
Wed Apr 6 17:33:54 PDT 2016


https://llvm.org/bugs/show_bug.cgi?id=27256

            Bug ID: 27256
           Summary: lldb doesn't support powerpc64 ELFv1 function
                    descriptors
           Product: lldb
           Version: unspecified
          Hardware: Macintosh
                OS: FreeBSD
            Status: NEW
          Severity: normal
          Priority: P
         Component: All Bugs
          Assignee: lldb-dev at lists.llvm.org
          Reporter: chmeeedalf at gmail.com
                CC: llvm-bugs at lists.llvm.org
    Classification: Unclassified

LLDB is nearly complete for powerpc, but powerpc64 support needs function
descriptors to get proper symbol tracking.  PowerPC64 doesn't use normal
function pointers in ELFv1 (big-endian, little endian now uses ELFv2, which
does use normal function pointers), but instead uses function descriptors. 
LLDB can't quite parse this correctly, so disassembly doesn't work quite right.
 This is one of the last pieces needed for supporting powerpc64.

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