[Bug gas/18581] New: (ARM): issue with function names with a dash inside

[adrien at guinet dot me]

https://sourceware.org/bugzilla/show_bug.cgi?id=18581

            Bug ID: 18581
           Summary: (ARM): issue with function names with a dash inside
           Product: binutils
           Version: 2.25
            Status: NEW
          Severity: normal
          Priority: P2
         Component: gas
          Assignee: unassigned at sourceware dot org
          Reporter: adrien at guinet dot me
  Target Milestone: 2.25

Created attachment 8384
  --> https://sourceware.org/bugzilla/attachment.cgi?id=8384&action=edit
failing test case

here is an issue when assembling an ARM assembly file which has one or multiple
functions which have a dash in their name.

For instance, the file bug-arm.s in the attached archive contains a "test-a"
function, and fails to assemble use GNU as:

I've used binutils-arm-linux-gnueabi debian package that includes binutils
2.25. The ARM toolchain from the android NDK has the same issue (binutils
2.24.90, see https://code.google.com/p/android/issues/detail?id=177830 for the
original issue from which this one is derived). 

$ arm-linux-gnueabi-as bug-arm.s -o bug-arm.o
bug-arm.s: Assembler messages:
bug-arm.s:23: Error: Missing symbol name in directive
bug-arm.s:23: Error: unrecognized symbol type "test"
bug-arm.s:23: Error: junk at end of line, first unrecognized character is `-'
bug-arm.s:26: Error: junk at end of line, first unrecognized character is `"'
bug-arm.s:39: Error: expected comma after name `' in .size directive
bug-arm.s:62: Error: bad expression -- `bl "test-a"(PLT)'

If "test-a" is replaced by "test_a" (cf. the file work-arm.s), then GNU as
manages to correctly assemble the object.

Note: even if the C language forbids dash in function names, some compilers
like LLVM can create functions with dash inside their name after some
optimisations.

Note bis: this works fines with the x86 GNU AS from binutils 2.25 (you can try
with the file bug-x86.s).

Thanks for any help/feedbacks/thoughts about this issue!

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