Pisadep.h revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2004 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#ifndef _PISADEP_H
#define _PISADEP_H
#pragma ident "%Z%%M% %I% %E% SMI"
#ifdef __cplusplus
extern "C" {
#endif
/*
* Internal ISA-dependent functions.
*
* Note that some ISA-dependent functions are exposed to applications, and found
* in libproc.h:
*
* Ppltdest()
* Pissyscall_prev()
* Pstack_iter()
*/
/*
* ISA dependent function to determine if the instruction at the given address
* is a syscall instruction. On x86, we have multiple system call instructions.
* this function returns 1 if there is a system call at the given address, 2 if
* there is a less preferred system call, and 0 if there is no system call
* there.
*/
extern int Pissyscall(struct ps_prochandle *, uintptr_t);
/*
* Works the same way as Pissyscall(), except operates on an in-memory buffer.
*/
extern int Pissyscall_text(struct ps_prochandle *, const void *buf,
size_t buflen);
#if defined(__amd64)
/* amd64 stack doubleword aligned, unaligned in 32-bit mode */
#define PSTACK_ALIGN32(sp) ((sp) & ~(2 * sizeof (int64_t) - 1))
#define PSTACK_ALIGN64(sp) (sp)
#elif defined(__i386)
/* i386 stack is unaligned */
#define PSTACK_ALIGN32(sp) (sp)
#define PSTACK_ALIGN64(sp) ALIGN32(sp)
#elif defined(__sparc)
/* sparc stack is doubleword aligned for 64-bit values */
#define PSTACK_ALIGN32(sp) ((sp) & ~(2 * sizeof (int32_t) - 1))
#define PSTACK_ALIGN64(sp) ((sp) & ~(2 * sizeof (int64_t) - 1))
#else
#error Unknown ISA
#endif
/*
* Given an argument count, stack pointer, and syscall index, sets up the stack
* and appropriate registers. The stack pointer should be the top of the stack
* area, after any space reserved for arguments passed by reference. Returns a
* pointer which is later passed to Psyscall_copyargs().
*/
extern uintptr_t Psyscall_setup(struct ps_prochandle *, int, int, uintptr_t);
/*
* Copies all arguments out to the stack once we're stopped before the syscall.
*/
extern int Psyscall_copyinargs(struct ps_prochandle *, int, argdes_t *,
uintptr_t);
/*
* Copies out arguments to their original values.
*/
extern int Psyscall_copyoutargs(struct ps_prochandle *, int, argdes_t *,
uintptr_t);
#ifdef __cplusplus
}
#endif
#endif /* _PISADEP_H */