K 10
svn:author
V 3
jhb
K 8
svn:date
V 27
2018-01-31T17:36:39.928094Z
K 7
svn:log
V 596
Consistently use 16-byte alignment for MIPS N32 and N64.

- Add a new <machine/abi.h> header to hold constants shared between C
  and assembly such as CALLFRAME_SZ.
- Add a new STACK_ALIGN constant to <machine/abi.h> and use it to
  replace hardcoded constants in the kernel and makecontext().  As a
  result of this, ensure the stack pointer on N32 and N64 is 16-byte
  aligned for N32 and N64 after exec(), after pthread_create(), and
  when sending signals rather than 8-byte aligned.

Reviewed by:	jmallett
Sponsored by:	DARPA / AFRL
Differential Revision:	https://reviews.freebsd.org/D13875

END