[Bug binutils/18882] New: readelf computes undefined expression (long int) 1 << 63

[zeccav at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=18882

            Bug ID: 18882
           Summary: readelf computes undefined expression (long int) 1 <<
                    63
           Product: binutils
           Version: 2.25
            Status: NEW
          Severity: minor
          Priority: P2
         Component: binutils
          Assignee: unassigned at sourceware dot org
          Reporter: zeccav at gmail dot com
  Target Milestone: ---

Running the gas testsuite with a gnu gcc sanitized version of readelf
I got the following sanitizer message

readelf.c:1569:37: runtime error: left shift of 1 by 63 places cannot be
represented in type 'long int'

the offending statement in readelf.c:1569 is

if (off == ((bfd_signed_vma) 1) << ((sizeof (bfd_signed_vma) * 8) - 1))

that tries to compute (long int) 1 << 63

but this is undefined.

Maybe it should be (unsigned long int) 1 << 63

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