[PATCH 0/5] Add support for R_386_GOT32X/R_X86_64_[REX_]GOTPCRELX

[H.J. Lu]

On Mon, Jan 18, 2016 at 7:58 AM, Rafael Espíndola
<rafael.espindola@gmail.com> wrote:
> Hi H.J. Lu,
>
> Sorry if I missed this somewhere else, but could you explain why we
> need these new relocations? Is it just to move work from the linker to
> the assembler or there was some correctness issue optimizing a plain
> R_X86_64_GOTPCREL?
>

They are used to convert memory operand of test and binop into
immediate operand, where binop is one of adc, add, and, cmp, or,
sbb, sub, xor instructions, when position-independent code is disabled.
The new relocation tells linker that it should try such optimization
since binop is one of mentioned above.

-- 
H.J.