[llvm-dev] [RFC][ARM] Add support for embedded position-independent code (ROPI/RWPI)

[Tim Northover via llvm-dev]

On 4 December 2015 at 05:46, Oliver Stannard via llvm-dev
<llvm-dev at lists.llvm.org> wrote:
> SysV-style PIC solves this by having the dynamic linker fix up any
> relocations on the data segment. Since these modes are trying to avoid
> the need for a dynamic linker, we instead have the compiler emit code to
> initialise these variables at startup time. These initiailisers are
> expected to be rare, so the dynamic initiaslisers will be smaller than
> the equivalent dynamic linker plus relocation and symbol tables.

What does armcc do here? It's been a while but I thought it was part
of the scatter-loading initialisation, with some kind of compressed
representation in the final linked image.

Cheers.

Tim.