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 #ifndef _SYS_FRAME_H 28*0Sstevel@tonic-gate #define _SYS_FRAME_H 29*0Sstevel@tonic-gate 30*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 31*0Sstevel@tonic-gate 32*0Sstevel@tonic-gate #include <sys/regset.h> 33*0Sstevel@tonic-gate 34*0Sstevel@tonic-gate #ifdef __cplusplus 35*0Sstevel@tonic-gate extern "C" { 36*0Sstevel@tonic-gate #endif 37*0Sstevel@tonic-gate 38*0Sstevel@tonic-gate /* 39*0Sstevel@tonic-gate * In the Intel world, a stack frame looks like this: 40*0Sstevel@tonic-gate * 41*0Sstevel@tonic-gate * %fp0->| | 42*0Sstevel@tonic-gate * |-------------------------------| 43*0Sstevel@tonic-gate * | Args to next subroutine | 44*0Sstevel@tonic-gate * |-------------------------------|-\ 45*0Sstevel@tonic-gate * %sp0->| One word struct-ret address | | 46*0Sstevel@tonic-gate * |-------------------------------| > minimum stack frame 47*0Sstevel@tonic-gate * %fp1->| Previous frame pointer (%fp0)| | 48*0Sstevel@tonic-gate * |-------------------------------|-/ 49*0Sstevel@tonic-gate * | Local variables | 50*0Sstevel@tonic-gate * %sp1->|-------------------------------| 51*0Sstevel@tonic-gate * 52*0Sstevel@tonic-gate * For amd64, the minimum stack frame is 16 bytes and the frame pointer must 53*0Sstevel@tonic-gate * be 16-byte aligned. 54*0Sstevel@tonic-gate */ 55*0Sstevel@tonic-gate 56*0Sstevel@tonic-gate struct frame { 57*0Sstevel@tonic-gate greg_t fr_savfp; /* saved frame pointer */ 58*0Sstevel@tonic-gate greg_t fr_savpc; /* saved program counter */ 59*0Sstevel@tonic-gate }; 60*0Sstevel@tonic-gate 61*0Sstevel@tonic-gate #ifdef _SYSCALL32 62*0Sstevel@tonic-gate 63*0Sstevel@tonic-gate /* 64*0Sstevel@tonic-gate * Kernel's view of a 32-bit stack frame. 65*0Sstevel@tonic-gate */ 66*0Sstevel@tonic-gate struct frame32 { 67*0Sstevel@tonic-gate greg32_t fr_savfp; /* saved frame pointer */ 68*0Sstevel@tonic-gate greg32_t fr_savpc; /* saved program counter */ 69*0Sstevel@tonic-gate }; 70*0Sstevel@tonic-gate 71*0Sstevel@tonic-gate #endif 72*0Sstevel@tonic-gate 73*0Sstevel@tonic-gate #ifdef __cplusplus 74*0Sstevel@tonic-gate } 75*0Sstevel@tonic-gate #endif 76*0Sstevel@tonic-gate 77*0Sstevel@tonic-gate #endif /* _SYS_FRAME_H */ 78