[PATCH] gold: aarch64 split stack support

[Cary Coutant]

> This patch adds gold support for split-stack function calling non-split
> function on aarch64.

>  if DEFAULT_TARGET_AARCH64
>
> -check_SCRIPTS += aarch64_reloc_none.sh
> -check_DATA += aarch64_reloc_none.stdout
> +check_SCRIPTS += aarch64_reloc_none.sh split_aarch64.sh
> +check_DATA += aarch64_reloc_none.stdout split_aarch64_1.stdout \
> +       split_aarch64_2.stdout split_aarch64_3.stdout split_aarch64_4.stdout \
> +       split_aarch64_r.stdout
>  aarch64_reloc_none.o: aarch64_reloc_none.s
>         $(TEST_AS) -o $@ $<
>  aarch64_reloc_none: aarch64_reloc_none.o ../ld-new
>         ../ld-new -o $@ aarch64_reloc_none.o --gc-sections
>  aarch64_reloc_none.stdout: aarch64_reloc_none
>         $(TEST_NM) $< > $@
> -
> -MOSTLYCLEANFILES += aarch64_reloc_none

Let's leave the aarch64_reloc_none test case untouched, and add your
new stuff below it:

+check_SCRIPTS += split_aarch64.sh
+check_DATA += split_aarch64_1.stdout \
+       split_aarch64_2.stdout split_aarch64_3.stdout split_aarch64_4.stdout \
+       split_aarch64_r.stdout

> +SPLIT_DEFSYMS = --defsym __morestack=0x100 --defsym __morestack_non_split=0x200
> +split_aarch64_1.o: split_aarch64_1.s
> +       $(TEST_AS) -o $@ $<
> +split_aarch64_2.o: split_aarch64_2.s
> +       $(TEST_AS) -o $@ $<
> +split_aarch64_3.o: split_aarch64_3.s
> +       $(TEST_AS) -o $@ $<
> +split_aarch64_4.o: split_aarch64_4.s
> +       $(TEST_AS) -o $@ $<
> +split_aarch64_n.o: split_aarch64_n.s
> +       $(TEST_AS) -o $@ $<
> +split_aarch64_1: split_aarch64_1.o ../ld-new
> +       ../ld-new $(SPLIT_DEFSYMS) -o $@ split_aarch64_1.o
> +split_aarch64_1.stdout: split_aarch64_1
> +       $(TEST_OBJDUMP) -d $< > $@
> +split_aarch64_2: split_aarch64_2.o split_aarch64_n.o ../ld-new
> +       ../ld-new $(SPLIT_DEFSYMS) -o $@ split_aarch64_2.o split_aarch64_n.o
> +split_aarch64_2.stdout: split_aarch64_2
> +       $(TEST_OBJDUMP) -d $< > $@
> +split_aarch64_3.stdout: split_aarch64_3.o split_aarch64_n.o ../ld-new
> +       ../ld-new $(SPLIT_DEFSYMS) -o split_aarch64_3 split_aarch64_3.o split_aarch64_n.o > $@ 2>&1 || exit 0
> +split_aarch64_4: split_aarch64_4.o split_aarch64_n.o ../ld-new
> +       ../ld-new $(SPLIT_DEFSYMS) -o $@ split_aarch64_4.o split_aarch64_n.o
> +split_aarch64_4.stdout: split_aarch64_4
> +       $(TEST_OBJDUMP) -d $< > $@
> +split_aarch64_r.stdout: split_aarch64_1.o split_aarch64_n.o ../ld-new
> +       ../ld-new -r split_aarch64_1.o split_aarch64_n.o -o split_aarch64_r > $@ 2>&1 || exit 0
> +#MOSTLYCLEANFILES += aarch64_reloc_none split_aarch64_1 split_aarch64_2 \
> +       split_aarch64_3 split_aarch64_r

Uncomment this line (and remove aarch64_reloc_none).

> diff --git a/gold/testsuite/Makefile.in b/gold/testsuite/Makefile.in
> index bbf8dc1..602e3ff 100644
> --- a/gold/testsuite/Makefile.in
> +++ b/gold/testsuite/Makefile.in

In the future, please remove the diffs for generated files when
posting patches for review.

Other than that, it looks OK.

Sorry for the delay -- I just lost track of the patch, and only found
it again today. It's always a good idea to ping me if you haven't
heard from me for a couple of weeks!

-cary