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Re: [MIPS] Can we have R_MIPS_PC64?
- From: Andrew Pinski <pinskia at gmail dot com>
- To: Fangrui Song <i at maskray dot me>
- Cc: binutils <binutils at sourceware dot org>
- Date: Wed, 5 Feb 2020 00:59:45 -0800
- Subject: Re: [MIPS] Can we have R_MIPS_PC64?
- References: <20200205071944.tberxwpcrkhnat4h@gmail.com>
On Tue, Feb 4, 2020 at 11:20 PM Fangrui Song <i@maskray.me> wrote:
>
> R_MIPS_PC32 exists as a GNU extension.
> R_MIPS_PC64 existed, but was removed by https://sourceware.org/git/?p=binutils-gdb.git;a=commit;h=4030e8f62467c29b782aa2480e1e452b8e458699
> (like all the old commits, the description just recorded what the commit *did*. There was no *why*.)
But the why is recorded still in the mail archives:
https://sourceware.org/ml/binutils/2004-04/msg00657.html
Thanks,
Andrew Pinski
>
> This just makes certain things unnecessarily complex.
>
> * DW_EH_PE_pcrel|DW_EH_PE_sdata8 => ?
> * __patchable_function_entries has to have the SHF_WRITE flag on MIPS https://gcc.gnu.org/ml/gcc/2020-01/msg00106.html
> .quad foo - . => Error: PC-relative reference to a different section