tree 2b30ac16dffb0cda5da6de86f73075813447ee5b
parent 201f36d23bb778b29c8d305fa40a41990e0487bc
author Elliott Hughes <enh@google.com> 1410215101 -0700
committer Elliott Hughes <enh@google.com> 1410220010 -0700

Ensure __set_errno is still visible on LP32.

The use of the .hidden directive to avoid going via the PLT for
__set_errno had the side-effect of actually making __set_errno
hidden (which is odd because assembler directives don't usually
affect symbols defined in a different file --- you can't even
create a weak reference to a symbol that's defined in a different
file).

This change switches the system call stubs over to a new always-hidden
__set_errno_internal and has a visible __set_errno on LP32 just for
binary compatibility with old NDK apps.

(cherry-pick of 7efad83d430f4d824f2aaa75edea5106f6ff8aae.)

Bug: 17423135
Change-Id: I6b6d7a05dda85f923d22e5ffd169a91e23499b7b