[llvm-bugs] [Bug 35744] New: [ELF] - -defsym incorrectly works with reserved symbols.

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=35744

            Bug ID: 35744
           Summary: [ELF] - -defsym incorrectly works with reserved
                    symbols.
           Product: lld
           Version: unspecified
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: ELF
          Assignee: unassignedbugs at nondot.org
          Reporter: grimar at accesssoftek.com
                CC: llvm-bugs at lists.llvm.org

Using code from defsym.s:

.globl foo1
 foo1 = 0x123

.global _start
_start:
  movl $foo2, %edx

and invocation:
# RUN: ld.lld -o %t %t.o --defsym=foo2=etext

Produces symbols foo2 and etext with value of 0x201005, what is correct,
though when expression is used instead, i.e:
# RUN: ld.lld -o %t %t.o --defsym=foo2=etext+1
then foo2 symbol value becomes wrong:

  Symbol {
    Name: foo2 (13)
    Value: 0x201000
    Size: 0
    Binding: Global (0x1)
    Type: None (0x0)
    Other: 0
    Section: .text (0x1)
  }
  Symbol {
    Name: etext (18)
    Value: 0x201005
    Size: 0
    Binding: Global (0x1)
    Type: None (0x0)
    Other: 0
    Section: .text (0x1)
  }
]

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