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 (c) 1990 by Sun Microsystems, Inc. 24 */ 25 26 #ifndef _SYS_MACHPCB_H 27 #define _SYS_MACHPCB_H 28 29 #pragma ident "%Z%%M% %I% %E% SMI" 30 31 #include <sys/stack.h> 32 #include <sys/regset.h> 33 #include <sys/privregs.h> 34 35 #ifdef __cplusplus 36 extern "C" { 37 #endif 38 39 /* 40 * This file is machine dependent. 41 */ 42 43 /* 44 * Machine dependent per-thread data. 45 */ 46 #define MAXWIN 8 /* max # of windows currently supported */ 47 48 /* 49 * The system actually supports one more than the above number. 50 * There is always one window reserved for trap handlers that 51 * never has to be saved into the pcb struct. 52 */ 53 54 /* 55 * Distance from beginning of thread stack (t_stk) to saved regs struct. 56 */ 57 #define REGOFF MINFRAME 58 59 #ifndef _ASM 60 61 /* 62 * The struct machpcb is always allocated stack aligned. 63 */ 64 typedef struct machpcb { 65 char mpcb_frame[REGOFF]; 66 struct regs mpcb_regs; /* user's saved registers */ 67 struct rwindow mpcb_wbuf[MAXWIN]; /* user window save buffer */ 68 caddr_t mpcb_spbuf[MAXWIN]; /* sp's for each wbuf */ 69 struct rwindow mpcb_rwin[2]; /* windows used while doing watchpoints */ 70 caddr_t mpcb_rsp[2]; /* sp's for pcb_rwin[] */ 71 int mpcb_uwm; /* user window mask */ 72 int mpcb_swm; /* shared user/kernel window mask */ 73 int mpcb_wbcnt; /* number of saved windows in pcb_wbuf */ 74 struct fpu mpcb_fpu; /* fpu state */ 75 struct fq mpcb_fpu_q[MAXFPQ]; /* fpu exception queue */ 76 int mpcb_flags; /* various state flags */ 77 int mpcb_wocnt; /* window overflow count */ 78 int mpcb_wucnt; /* window underflow count */ 79 kthread_t *mpcb_thread; /* associated thread */ 80 } machpcb_t; 81 #endif /* ! _ASM */ 82 83 /* mpcb_flags */ 84 #define CLEAN_WINDOWS 0x01 /* keep user regs clean */ 85 #define FP_TRAPPED 0x02 /* fp_traps call caused by fp queue */ 86 #define GOTO_SYS_RTT 0x04 /* return from syscall via sys_rtt */ 87 88 89 /* 90 * We can use lwp_regs to find the mpcb base. 91 */ 92 #ifndef _ASM 93 #define lwptompcb(lwp) ((struct machpcb *) \ 94 ((caddr_t)(lwp)->lwp_regs - REGOFF)) 95 #endif 96 97 #ifdef __cplusplus 98 } 99 #endif 100 101 #endif /* _SYS_MACHPCB_H */ 102