[llvm-dev] [LLD] Slow callstacks in gdb

[Rui Ueyama via llvm-dev]

Got it. Thanks. I'd vote for just reporting the issue to Intel and keep our
existing behavior.

On Tue, Dec 5, 2017 at 7:14 PM, Rafael Avila de Espindola <
rafael.espindola at gmail.com> wrote:

> Rui Ueyama <ruiu at google.com> writes:
>
> > Somewhat orthogonal to the original issue, but if object files are
> aligned
> > only to two bytes in a static archive, and if we are using the four byte
> > aligned load instruction on armv6 to load data from object files, that
> > means current LLVM can easily cause a bus error on armv6, no?
>
> We are not using a 4 byte aligned load. We are using:
>
> >> the 2 byte aligned case is
> >>
> >>   ldrh    r1, [r0, #2]
> >>   ldrh    r0, [r0]
> >>   orr     r0, r0, r1, lsl #16
>
> That is why the check for the section being at least 2 byte aligned is
> important.
>
> The 2 is from
>
>   using Elf_Word = support::detail::packed_endian_specific_integral<
>       uint32_t, target_endianness, 2>;
>
> Cheers,
> Rafael
>
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