[PATCH/ARM][PING^2] Handle arbitrary .plt/.got displacements in ld on ARM

[Yury Gribov]

Link to original discussion:
https://sourceware.org/ml/binutils/2014-02/msg00053.html

Will Newton wrote:
>> I suggest to add an option --long-plt to allow generation of 4-word wide
>> .plt entries capable of handling arbitrary .plt/.got displacements:
  >
  > This sounds ok in principle to me (note I am not the ARM or a global
  > maintainer).

> I think elf32_arm_use_long_plt_entry should probably be
> a boolean rather than size_t.

Done, thanks

> The comments on the PLT entries could be more verbose (i.e. point out
> that one PLT can address 28 bits and the other 32).

Ok, I tried my best.

> I wonder whether the FOUR_WORD_PLT #define is now rather ambiguous,
> maybe it should be removed?

That was my impression as well. At least there are no options in
configure scripts to define.

> The gold parts of this patch look like they are not related?

Sorry, unrelated indeed.

> And obviously there would need to be ld testcases.

Added ld/testsuite/ld-arm/long-plt-format.{s,d}. BTW are there any
guidelines for writing tests? I was unable to find any...

-Y






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