tree 2b49f2f691f432e1e2a8378ba296adc8b8d85dfb
parent 5c73b4f984b376d2046c3ff7cf9213a5d8df4ae1
author Elliott Hughes <enh@google.com> 1706135100 -0800
committer Elliott Hughes <enh@google.com> 1706135100 -0800

Clarify which architectures do/don't need sa_restorer.

In particular: 32-bit x86 doesn't need sa_restorer either.

I still don't fully understand why arm32 and x86-64 do, so I've left the
comments in those .S files alone. I haven't (knowingly) tested
compiler-rt since we switched from libgcc (which is what the comments
refer to), but I have tested libunwindstack since we switched from
libunwind, and that does fail existing bionic tests for unwinds through
signal frames --- I just don't know why, or whether there's a better fix.

Anyway, local testing suggests that the 32-bit x86 code is vestigial, so
let's get rid of it.

Test: treehugger
Change-Id: I3e2616f736d27a8463814356e5adb52fd76a90cc