15254 %ymm registers not restored after signal handler
15367 x86 getfpregs() summons corrupting %xmm ghosts
15333 want x86 /proc xregs support (libc_db, libproc, mdb, etc.)
15336 want libc functions for extended ucontext_t
15334 want ps_lwphandle-specific reg routines
15328 FPU_CW_INIT mistreats reserved bit
15335 i86pc fpu_subr.c isn't really platform-specific
15332 setcontext(2) isn't actually noreturn
15331 need <sys/stdalign.h>
Change-Id: I7060aa86042dfb989f77fc3323c065ea2eafa9ad
Conflicts:
    usr/src/uts/common/fs/proc/prcontrol.c
    usr/src/uts/intel/os/archdep.c
    usr/src/uts/intel/sys/ucontext.h
    usr/src/uts/intel/syscall/getcontext.c

*** 1262,1271 ****
--- 1262,1272 ----
  file path=usr/share/man/man3c/strtows.3c
  file path=usr/share/man/man3c/strxfrm.3c
  link path=usr/share/man/man3c/strxfrm_l.3c target=strxfrm.3c
  file path=usr/share/man/man3c/swab.3c
  link path=usr/share/man/man3c/swapcontext.3c target=makecontext.3c
+ link path=usr/share/man/man3c/swapcontext_extd.3c target=makecontext.3c
  link path=usr/share/man/man3c/swprintf.3c target=fwprintf.3c
  link path=usr/share/man/man3c/swscanf.3c target=fwscanf.3c
  file path=usr/share/man/man3c/sync_instruction_memory.3c
  file path=usr/share/man/man3c/sysconf.3c
  file path=usr/share/man/man3c/syslog.3c
*** 1359,1368 ****
--- 1360,1371 ----
  link path=usr/share/man/man3c/tzset.3c target=ctime.3c
  file path=usr/share/man/man3c/u8_strcmp.3c
  file path=usr/share/man/man3c/u8_textprep_str.3c
  file path=usr/share/man/man3c/u8_validate.3c
  file path=usr/share/man/man3c/ualarm.3c
+ file path=usr/share/man/man3c/ucontext_alloc.3c
+ link path=usr/share/man/man3c/ucontext_free.3c target=ucontext_alloc.3c
  file path=usr/share/man/man3c/uconv_u16tou32.3c
  link path=usr/share/man/man3c/uconv_u16tou8.3c target=uconv_u16tou32.3c
  link path=usr/share/man/man3c/uconv_u32tou16.3c target=uconv_u16tou32.3c
  link path=usr/share/man/man3c/uconv_u32tou8.3c target=uconv_u16tou32.3c
  link path=usr/share/man/man3c/uconv_u8tou16.3c target=uconv_u16tou32.3c