[llvm-bugs] [Bug 32628] New: When using C-bindings, on x86_64 ELF, fails to generate the correct instruction for external call

[via llvm-bugs]

http://bugs.llvm.org/show_bug.cgi?id=32628

            Bug ID: 32628
           Summary: When using C-bindings, on x86_64 ELF, fails to
                    generate the correct instruction for external call
           Product: libraries
           Version: 4.0
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: OrcJIT
          Assignee: unassignedbugs at nondot.org
          Reporter: vlad at cloudflare.com
                CC: llvm-bugs at lists.llvm.org

Created attachment 18271
  --> http://bugs.llvm.org/attachment.cgi?id=18271&action=edit
Code to reproduce the problem

Debian 8, using llvm 4.0, as well as the trunk, when running the attached code
I get a segfault.

It looks like the generated call is of the near, ip-relative type, and when the
symbol is resolved, the offset is incorrect, as it can't fit into 32-bit
allowed for that type of instruction.

$ clang -g min.c `llvm-config --cflags --ldflags --system-libs --libs core
orcjit native` -rdynamic  -lstdc++ -o min
$ gdb min
$ (gdb) run
$ Program received signal SIGSEGV, Segmentation fault.
$ 0x00007ffff7ff0001 in ?? ()
$ (gdb) x/i 0x00007ffff7ff0001
$ => 0x7ffff7ff0001:    callq  0x800000edbd50

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