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/*
* 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 (c) 1998-2000 by Sun Microsystems, Inc.
* All rights reserved.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include "libproc.h"
typedef union {
offset_t full; /* full 64 bit offset value */
uint32_t half[2]; /* two 32-bit halves */
} offsets_t;
/*
* lseek() system call -- executed by subject process.
*/
off_t
pr_lseek(struct ps_prochandle *Pr, int filedes, off_t offset, int whence)
{
int syscall; /* SYS_lseek or SYS_llseek */
int nargs; /* 3 or 4, depending on syscall */
offsets_t off;
sysret_t rval; /* return value from lseek() */
argdes_t argd[4]; /* arg descriptors for lseek() */
argdes_t *adp;
int error;
if (Pr == NULL)
return (lseek(filedes, offset, whence));
adp = &argd[0]; /* filedes argument */
adp->arg_value = filedes;
adp->arg_object = NULL;
adp->arg_type = AT_BYVAL;
adp->arg_inout = AI_INPUT;
adp->arg_size = 0;
adp++; /* offset argument */
if (Pstatus(Pr)->pr_dmodel == PR_MODEL_NATIVE) {
syscall = SYS_lseek;
nargs = 3;
adp->arg_value = offset;
adp->arg_object = NULL;
adp->arg_type = AT_BYVAL;
adp->arg_inout = AI_INPUT;
adp->arg_size = 0;
} else {
syscall = SYS_llseek;
nargs = 4;
off.full = offset;
adp->arg_value = off.half[0]; /* first 32 bits */
adp->arg_object = NULL;
adp->arg_type = AT_BYVAL;
adp->arg_inout = AI_INPUT;
adp->arg_size = 0;
adp++;
adp->arg_value = off.half[1]; /* second 32 bits */
adp->arg_object = NULL;
adp->arg_type = AT_BYVAL;
adp->arg_inout = AI_INPUT;
adp->arg_size = 0;
}
adp++; /* whence argument */
adp->arg_value = whence;
adp->arg_object = NULL;
adp->arg_type = AT_BYVAL;
adp->arg_inout = AI_INPUT;
adp->arg_size = 0;
error = Psyscall(Pr, &rval, syscall, nargs, &argd[0]);
if (error) {
errno = (error > 0)? error : ENOSYS;
return ((off_t)(-1));
}
if (Pstatus(Pr)->pr_dmodel == PR_MODEL_NATIVE)
offset = rval.sys_rval1;
else {
off.half[0] = (uint32_t)rval.sys_rval1;
off.half[1] = (uint32_t)rval.sys_rval2;
offset = (off_t)off.full;
}
return (offset);
}
/*
* llseek() system call -- executed by subject process.
*/
offset_t
pr_llseek(struct ps_prochandle *Pr, int filedes, offset_t offset, int whence)
{
int syscall; /* SYS_lseek or SYS_llseek */
int nargs; /* 3 or 4, depending on syscall */
offsets_t off;
sysret_t rval; /* return value from llseek() */
argdes_t argd[4]; /* arg descriptors for llseek() */
argdes_t *adp;
int error;
if (Pr == NULL)
return (llseek(filedes, offset, whence));
adp = &argd[0]; /* filedes argument */
adp->arg_value = filedes;
adp->arg_object = NULL;
adp->arg_type = AT_BYVAL;
adp->arg_inout = AI_INPUT;
adp->arg_size = 0;
adp++; /* offset argument */
if (Pstatus(Pr)->pr_dmodel == PR_MODEL_LP64) {
syscall = SYS_lseek;
nargs = 3;
adp->arg_value = offset;
adp->arg_object = NULL;
adp->arg_type = AT_BYVAL;
adp->arg_inout = AI_INPUT;
adp->arg_size = 0;
} else {
syscall = SYS_llseek;
nargs = 4;
off.full = offset;
adp->arg_value = off.half[0]; /* first 32 bits */
adp->arg_object = NULL;
adp->arg_type = AT_BYVAL;
adp->arg_inout = AI_INPUT;
adp->arg_size = 0;
adp++;
adp->arg_value = off.half[1]; /* second 32 bits */
adp->arg_object = NULL;
adp->arg_type = AT_BYVAL;
adp->arg_inout = AI_INPUT;
adp->arg_size = 0;
}
adp++; /* whence argument */
adp->arg_value = whence;
adp->arg_object = NULL;
adp->arg_type = AT_BYVAL;
adp->arg_inout = AI_INPUT;
adp->arg_size = 0;
error = Psyscall(Pr, &rval, syscall, nargs, &argd[0]);
if (error) {
errno = (error > 0)? error : ENOSYS;
return ((offset_t)(-1));
}
if (Pstatus(Pr)->pr_dmodel == PR_MODEL_LP64)
offset = rval.sys_rval1;
else {
off.half[0] = (uint32_t)rval.sys_rval1;
off.half[1] = (uint32_t)rval.sys_rval2;
offset = off.full;
}
return (offset);
}
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