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