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

*** 84,94 ****
  
  
         void ps_plog(const char *fmt);
  
  
-    SPARC
         ps_err_e ps_lgetxregsize(struct ps_prochandle *ph,
              lwpid_t lwpid, int *xregsize);
  
  
         ps_err_e ps_lgetxregs(struct ps_prochandle *ph,
--- 84,93 ----
*** 209,220 ****
  
  
         ps_plog()
                                Logs a message.
  
- 
-    SPARC
         ps_lgetxregsize()
                              Returns the size of the architecture-dependent
                              extra state registers.
  
  
--- 208,217 ----
*** 248,253 ****
         attributes(7)
  
  
         Linker and Libraries Guide
  
!                                October 12, 2007            PROC_SERVICE(3PROC)
--- 245,250 ----
         attributes(7)
  
  
         Linker and Libraries Guide
  
!                                January 23, 2023            PROC_SERVICE(3PROC)