x86-64 push / jmp / mov of undefined label results in bad relocation for position-independent code

[Bruno Loff]

Ah, I see my sparse knowledge of assembly was to blame.

Using `movabs` I got it to work perfectly.

Thank you for taking your time to answer my noob question.

Bruno

On 22 August 2017 at 12:42, Jan Beulich <JBeulich@suse.com> wrote:
>>>> On 22.08.17 at 13:25, <bruno.loff@gmail.com> wrote:
>> When compiling an x86-64 assembly file which contains a `push`, `jmp`
>> or `mov` instruction having an undefined label as an operand, `as`
>> generates a relocation of type `R_X86_64_32S`, which is only 32bit
>> long, i.e., it is too short for position-independent code (since such
>> code might be loaded onto a position outside the 32-bit address
>> space).
>
> Of course. All three named mnemonics have only 32-bit immediate
> operands, so a wider relocation cannot possibly be used with them.
> You'll need to go through a register, using movabs or lea to load
> the intended value into it.
>
> Jan
>