K 10
svn:author
V 5
markj
K 8
svn:date
V 27
2020-01-21T17:45:49.289281Z
K 7
svn:log
V 519
Add relocation handling required for -zifunc-noplt to work on arm64.

Static relocations for the immediate operand of a branch instruction
must be applied.

In a patch which implements LSE-based atomic(9) operations using ifuncs,
-zifunc-noplt reduces system CPU usage during a buildkernel by several
percent.

Also fix elf_reloc_internal() to return an error if symbol lookup fails.

Reviewed by:	andrew
MFC after:	2 weeks
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D17392

END