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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


  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 
  22 /*
  23  * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26 
  27 /*      Copyright (c) 1990, 1991 UNIX System Laboratories, Inc. */
  28 /*      Copyright (c) 1988 AT&T     */
  29 /*        All Rights Reserved   */
  30 




  31 #include "lint.h"
  32 #include <sys/types.h>
  33 #include <sys/ucontext.h>
  34 #include <setjmp.h>
  35 #include <ucontext.h>


  36 #include "libc.h"
  37 
  38 #pragma weak _siglongjmp = siglongjmp
  39 
  40 void
  41 siglongjmp(sigjmp_buf env, int val)
  42 {

  43         ucontext_t *ucp = (ucontext_t *)env;
  44 
  45         if (val)
  46                 ucp->uc_mcontext.gregs[EAX] = val;
  47         else
  48                 ucp->uc_mcontext.gregs[EAX] = 1;
  49 




  50         (void) setcontext(ucp);

  51 }


  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 
  22 /*
  23  * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26 
  27 /*      Copyright (c) 1990, 1991 UNIX System Laboratories, Inc. */
  28 /*      Copyright (c) 1988 AT&T     */
  29 /*        All Rights Reserved   */
  30 
  31 /*
  32  * Copyright 2023 Oxide Computer Company
  33  */
  34 
  35 #include "lint.h"
  36 #include <sys/types.h>
  37 #include <sys/ucontext.h>
  38 #include <setjmp.h>
  39 #include <ucontext.h>
  40 #include <strings.h>
  41 #include <upanic.h>
  42 #include "libc.h"
  43 
  44 #pragma weak _siglongjmp = siglongjmp
  45 
  46 void
  47 siglongjmp(sigjmp_buf env, int val)
  48 {
  49         const char *msg = "siglongjmp(): setcontext() returned";
  50         ucontext_t *ucp = (ucontext_t *)env;
  51 
  52         if (val)
  53                 ucp->uc_mcontext.gregs[EAX] = val;
  54         else
  55                 ucp->uc_mcontext.gregs[EAX] = 1;
  56 
  57         /*
  58          * While unlikely, it is possible that setcontext() may fail for some
  59          * reason. If that happens, we will kill the process.
  60          */
  61         (void) setcontext(ucp);
  62         upanic(msg, strlen(msg) + 1);
  63 }