1*0Sstevel@tonic-gate /* 2*0Sstevel@tonic-gate * CDDL HEADER START 3*0Sstevel@tonic-gate * 4*0Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5*0Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 6*0Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 7*0Sstevel@tonic-gate * with the License. 8*0Sstevel@tonic-gate * 9*0Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10*0Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 11*0Sstevel@tonic-gate * See the License for the specific language governing permissions 12*0Sstevel@tonic-gate * and limitations under the License. 13*0Sstevel@tonic-gate * 14*0Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 15*0Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16*0Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 17*0Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 18*0Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 19*0Sstevel@tonic-gate * 20*0Sstevel@tonic-gate * CDDL HEADER END 21*0Sstevel@tonic-gate */ 22*0Sstevel@tonic-gate /* 23*0Sstevel@tonic-gate * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 24*0Sstevel@tonic-gate * Use is subject to license terms. 25*0Sstevel@tonic-gate */ 26*0Sstevel@tonic-gate 27*0Sstevel@tonic-gate /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ 28*0Sstevel@tonic-gate /* All Rights Reserved */ 29*0Sstevel@tonic-gate 30*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 31*0Sstevel@tonic-gate /* 32*0Sstevel@tonic-gate * UNIX shell 33*0Sstevel@tonic-gate */ 34*0Sstevel@tonic-gate 35*0Sstevel@tonic-gate /* To use stack as temporary workspace across 36*0Sstevel@tonic-gate * possible storage allocation (eg name lookup) 37*0Sstevel@tonic-gate * a) get ptr from `relstak' 38*0Sstevel@tonic-gate * b) can now use `pushstak' 39*0Sstevel@tonic-gate * c) then reset with `setstak' 40*0Sstevel@tonic-gate * d) `absstak' gives real address if needed 41*0Sstevel@tonic-gate */ 42*0Sstevel@tonic-gate #define relstak() (staktop-stakbot) 43*0Sstevel@tonic-gate #define absstak(x) (stakbot+Rcheat(x)) 44*0Sstevel@tonic-gate #define setstak(x) (staktop=absstak(x)) 45*0Sstevel@tonic-gate #define pushstak(c) (*staktop++=(c)) 46*0Sstevel@tonic-gate #define zerostak() (*staktop=0) 47*0Sstevel@tonic-gate 48*0Sstevel@tonic-gate /* Used to address an item left on the top of 49*0Sstevel@tonic-gate * the stack (very temporary) 50*0Sstevel@tonic-gate */ 51*0Sstevel@tonic-gate #define curstak() (staktop) 52*0Sstevel@tonic-gate 53*0Sstevel@tonic-gate /* `usestak' before `pushstak' then `fixstak' 54*0Sstevel@tonic-gate * These routines are safe against heap 55*0Sstevel@tonic-gate * being allocated. 56*0Sstevel@tonic-gate */ 57*0Sstevel@tonic-gate #define usestak() {locstak();} 58*0Sstevel@tonic-gate 59*0Sstevel@tonic-gate /* for local use only since it hands 60*0Sstevel@tonic-gate * out a real address for the stack top 61*0Sstevel@tonic-gate */ 62*0Sstevel@tonic-gate extern unsigned char *locstak(); 63*0Sstevel@tonic-gate 64*0Sstevel@tonic-gate /* Will allocate the item being used and return its 65*0Sstevel@tonic-gate * address (safe now). 66*0Sstevel@tonic-gate */ 67*0Sstevel@tonic-gate #define fixstak() endstak(staktop) 68*0Sstevel@tonic-gate 69*0Sstevel@tonic-gate /* For use after `locstak' to hand back 70*0Sstevel@tonic-gate * new stack top and then allocate item 71*0Sstevel@tonic-gate */ 72*0Sstevel@tonic-gate extern unsigned char *endstak(); 73*0Sstevel@tonic-gate 74*0Sstevel@tonic-gate /* Copy a string onto the stack and 75*0Sstevel@tonic-gate * allocate the space. 76*0Sstevel@tonic-gate */ 77*0Sstevel@tonic-gate extern unsigned char *cpystak(); 78*0Sstevel@tonic-gate 79*0Sstevel@tonic-gate /* Copy a string onto the stack, checking for stack overflow 80*0Sstevel@tonic-gate * as the copy is done. Same calling sequence as "movstr". 81*0Sstevel@tonic-gate */ 82*0Sstevel@tonic-gate extern unsigned char *movstrstak(); 83*0Sstevel@tonic-gate 84*0Sstevel@tonic-gate /* Move bytes onto the stack, checking for stack overflow 85*0Sstevel@tonic-gate * as the copy is done. Same calling sequence as the C 86*0Sstevel@tonic-gate * library routine "memcpy". 87*0Sstevel@tonic-gate */ 88*0Sstevel@tonic-gate extern unsigned char *memcpystak(); 89*0Sstevel@tonic-gate 90*0Sstevel@tonic-gate /* Allocate given ammount of stack space */ 91*0Sstevel@tonic-gate extern unsigned char *getstak(); 92*0Sstevel@tonic-gate 93*0Sstevel@tonic-gate /* Grow the data segment to include a given location */ 94*0Sstevel@tonic-gate extern void growstak(); 95*0Sstevel@tonic-gate 96*0Sstevel@tonic-gate /* A chain of ptrs of stack blocks that 97*0Sstevel@tonic-gate * have become covered by heap allocation. 98*0Sstevel@tonic-gate * `tdystak' will return them to the heap. 99*0Sstevel@tonic-gate */ 100*0Sstevel@tonic-gate extern struct blk *stakbsy; 101*0Sstevel@tonic-gate 102*0Sstevel@tonic-gate /* Base of the entire stack */ 103*0Sstevel@tonic-gate extern unsigned char *stakbas; 104*0Sstevel@tonic-gate 105*0Sstevel@tonic-gate /* Top of entire stack */ 106*0Sstevel@tonic-gate extern unsigned char *brkend; 107*0Sstevel@tonic-gate 108*0Sstevel@tonic-gate /* Base of current item */ 109*0Sstevel@tonic-gate extern unsigned char *stakbot; 110*0Sstevel@tonic-gate 111*0Sstevel@tonic-gate /* Top of current item */ 112*0Sstevel@tonic-gate extern unsigned char *staktop; 113*0Sstevel@tonic-gate 114*0Sstevel@tonic-gate /* Used with tdystak */ 115*0Sstevel@tonic-gate extern unsigned char *savstak(); 116