1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  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 /*      Copyright (c) 1988 AT&T     */
  22 /*        All Rights Reserved   */
  23 
  24 
  25 /*
  26  * Copyright 2014 Garrett D'Amore <garrett@damore.org>
  27  * Copyright 2023 Oxide Computer Company
  28  *
  29  * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
  30  * Use is subject to license terms.
  31  */
  32 
  33 #ifndef _UCONTEXT_H
  34 #define _UCONTEXT_H
  35 
  36 #include <sys/ucontext.h>
  37 /*
  38  * The file sys/regset.h defines indices in the gregset_t array,
  39  * such as EIP on i386.  Those defines were historically exposed
  40  * via sys/ucontext.h, sys/signal.h, etc. which caused surprises
  41  * due to those defines unexpectedly polluting the namespace.
  42  * On the other hand, several existing applications assume that
  43  * the regset names are defined after an include <ucontext.h>.
  44  * To solve both problems at once: <ucontext.h> (this file)
  45  * DOES include sys/regset.h for you but <sys/ucontext.h>
  46  * does NOT include sys/regset.h anymore.
  47  */
  48 #if !defined(_XPG4_2) || defined(__EXTENSIONS__)
  49 #include <sys/regset.h>
  50 #include <sys/siginfo.h>
  51 #include <sys/int_types.h>
  52 #endif
  53 
  54 #ifdef  __cplusplus
  55 extern "C" {
  56 #endif
  57 
  58 #ifdef __sparc
  59 #ifdef __PRAGMA_REDEFINE_EXTNAME
  60 #pragma redefine_extname        makecontext     __makecontext_v2
  61 #else
  62 #define makecontext     __makecontext_v2
  63 #endif
  64 #endif
  65 
  66 extern int getcontext(ucontext_t *) __RETURNS_TWICE;
  67 #pragma unknown_control_flow(getcontext)
  68 extern int setcontext(const ucontext_t *);
  69 extern int swapcontext(ucontext_t *_RESTRICT_KYWD,
  70                 const ucontext_t *_RESTRICT_KYWD);
  71 extern void makecontext(ucontext_t *, void(*)(), int, ...);
  72 
  73 #if !defined(_XPG4_2) || defined(__EXTENSIONS__)
  74 extern ucontext_t *ucontext_alloc(uint32_t);
  75 extern void ucontext_free(ucontext_t *);
  76 extern int getcontext_extd(ucontext_t *, uint32_t) __RETURNS_TWICE;
  77 #pragma unknown_control_flow(getcontext_extd)
  78 extern int swapcontext_extd(ucontext_t *_RESTRICT_KYWD, uint32_t,
  79                 const ucontext_t *_RESTRICT_KYWD);
  80 extern int walkcontext(const ucontext_t *, int (*)(uintptr_t, int, void *),
  81     void *);
  82 extern int printstack(int);
  83 extern int addrtosymstr(void *, char *, int);
  84 extern int getustack(stack_t **);
  85 extern int setustack(stack_t *);
  86 
  87 extern int stack_getbounds(stack_t *);
  88 extern int stack_setbounds(const stack_t *);
  89 extern int stack_inbounds(void *);
  90 extern int stack_violation(int, const siginfo_t *, const ucontext_t *);
  91 
  92 extern void *_stack_grow(void *);
  93 #endif  /* !_XPG4_2 || __EXTENSIONS__ */
  94 
  95 #ifdef  __cplusplus
  96 }
  97 #endif
  98 
  99 #endif  /* _UCONTEXT_H */