usr/src/lib/libproc/common/Pisadep.h

   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, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22 /*
  23  * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 #ifndef _PISADEP_H
  28 #define _PISADEP_H
  29
  30 #pragma ident   "%Z%%M% %I%     %E% SMI"
  31
  32 #ifdef  __cplusplus
  33 extern "C" {
  34 #endif
  35
  36 /*
  37  * Internal ISA-dependent functions.
  38  *
  39  * Note that some ISA-dependent functions are exposed to applications, and found
  40  * in libproc.h:
  41  *
  42  *      Ppltdest()
  43  *      Pissyscall_prev()
  44  *      Pstack_iter()
  45  */
  46
  47 /*
  48  * ISA dependent function to determine if the instruction at the given address
  49  * is a syscall instruction.  On x86, we have multiple system call instructions.
  50  * this function returns 1 if there is a system call at the given address, 2 if
  51  * there is a less preferred system call, and 0 if there is no system call
  52  * there.
  53  */
  54 extern int Pissyscall(struct ps_prochandle *, uintptr_t);
  55 /*
  56  * Works the same way as Pissyscall(), except operates on an in-memory buffer.
  57  */
  58 extern int Pissyscall_text(struct ps_prochandle *, const void *buf,
  59     size_t buflen);
  60
  61 #if defined(__amd64)
  62 /* amd64 stack doubleword aligned, unaligned in 32-bit mode  */
  63 #define PSTACK_ALIGN32(sp)      ((sp) & ~(2 * sizeof (int64_t) - 1))
  64 #define PSTACK_ALIGN64(sp)      (sp)
  65 #elif defined(__i386)
  66 /* i386 stack is unaligned */
  67 #define PSTACK_ALIGN32(sp)      (sp)
  68 #define PSTACK_ALIGN64(sp)      ALIGN32(sp)
  69 #elif defined(__sparc)
  70 /* sparc stack is doubleword aligned for 64-bit values */
  71 #define PSTACK_ALIGN32(sp)      ((sp) & ~(2 * sizeof (int32_t) - 1))
  72 #define PSTACK_ALIGN64(sp)      ((sp) & ~(2 * sizeof (int64_t) - 1))
  73 #else
  74 #error  Unknown ISA
  75 #endif
  76
  77 /*
  78  * Given an argument count, stack pointer, and syscall index, sets up the stack
  79  * and appropriate registers.  The stack pointer should be the top of the stack
  80  * area, after any space reserved for arguments passed by reference.  Returns a
  81  * pointer which is later passed to Psyscall_copyargs().
  82  */
  83 extern uintptr_t Psyscall_setup(struct ps_prochandle *, int, int, uintptr_t);
  84
  85 /*
  86  * Copies all arguments out to the stack once we're stopped before the syscall.
  87  */
  88 extern int Psyscall_copyinargs(struct ps_prochandle *, int, argdes_t *,
  89     uintptr_t);
  90
  91 /*
  92  * Copies out arguments to their original values.
  93  */
  94 extern int Psyscall_copyoutargs(struct ps_prochandle *, int, argdes_t *,
  95     uintptr_t);
  96
  97 #ifdef  __cplusplus
  98 }
  99 #endif
 100
 101 #endif  /* _PISADEP_H */