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

@@ -61,10 +61,11 @@
 extern void kmem_free(void *buf, size_t size);
 extern void *kmem_alloc_tryhard(size_t size, size_t *alloc_size, int kmflags);
 extern void kmem_dump_init(size_t);
 extern void kmem_dump_begin(void);
 extern size_t kmem_dump_finish(char *buf, size_t size);
+extern void *kmem_rezalloc(void *, size_t, size_t, int);
 
 #endif  /* _KERNEL */
 
 /*
  * Kernel memory allocator: private interfaces.