lld wants to remove bl/blx substitution for non-function symbols
(https://reviews.llvm.org/D73542). GNU ld apparently already doesn't
do it.
Since _ZN8crashpad14CaptureContextEP10ucontext_t wasn't marked as a function,
chromium's thumb code would then branch without mode transition into
crashpads non-thumb assembly (in arm32).
So mark the symbol as function, so that things work even if that patch
relands. This should also make things work with GNU ld, though I haven't
verified that it was broken before and works now.
I also did this for aarch64 since it seems like The Right Thing To Do
(assuming the assembler accepts it, which I also haven't checked --
the CQ will hopefully check that).
Bug: chromium:1049649
Change-Id: I3452c16f0d52a2dc0397fd3d60d06b5c39a4b524
Reviewed-on: https://chromium-review.googlesource.com/c/crashpad/crashpad/+/2044144
Reviewed-by: Mark Mentovai <mark@chromium.org>
Commit-Queue: Nico Weber <thakis@chromium.org>
7ed4d5c454