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      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 (the "License").
      6  * You may not use this file except in compliance with the License.
      7  *
      8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
      9  * or http://www.opensolaris.org/os/licensing.
     10  * See the License for the specific language governing permissions
     11  * and limitations under the License.
     12  *
     13  * When distributing Covered Code, include this CDDL HEADER in each
     14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
     15  * If applicable, add the following below this CDDL HEADER, with the
     16  * fields enclosed by brackets "[]" replaced with your own identifying
     17  * information: Portions Copyright [yyyy] [name of copyright owner]
     18  *
     19  * CDDL HEADER END
     20  */
     21 
     22 /*
     23  * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
     24  * Use is subject to license terms.
     25  */
     26 
     27 #ifndef _SYS_PCB_H
     28 #define	_SYS_PCB_H
     29 
     30 #include <sys/regset.h>
     31 #include <sys/segments.h>
     32 
     33 #ifdef	__cplusplus
     34 extern "C" {
     35 #endif
     36 
     37 #ifndef _ASM
     38 typedef struct fpu_ctx {
     39 	kfpu_t		fpu_regs;	/* kernel save area for FPU */
     40 	uint_t		fpu_flags;	/* FPU state flags */
     41 } fpu_ctx_t;
     42 
     43 typedef struct pcb {
     44 	fpu_ctx_t	pcb_fpu;	/* fpu state */
     45 	uint_t		pcb_flags;	/* state flags; cleared on fork */
     46 	greg_t		pcb_drstat;	/* status debug register (%dr6) */
     47 	unsigned char	pcb_instr;	/* /proc: instruction at stop */
     48 #if defined(__amd64)
     49 	unsigned char	pcb_rupdate;	/* new register values in pcb -> regs */
     50 	uintptr_t	pcb_fsbase;
     51 	uintptr_t	pcb_gsbase;
     52 	selector_t	pcb_ds;
     53 	selector_t	pcb_es;
     54 	selector_t	pcb_fs;
     55 	selector_t	pcb_gs;
     56 #endif /* __amd64 */
     57 	user_desc_t	pcb_fsdesc;	/* private per-lwp %fs descriptors */
     58 	user_desc_t	pcb_gsdesc;	/* private per-lwp %gs descriptors */
     59 } pcb_t;
     60 
     61 #endif /* ! _ASM */
     62 
     63 /* pcb_flags */
     64 #define	DEBUG_PENDING	0x02	/* single-step of lcall for a sys call */
     65 #define	PRSTOP_CALLED	0x04	/* prstop() has been called for this lwp */
     66 #define	INSTR_VALID	0x08	/* value in pcb_instr is valid (/proc) */
     67 #define	NORMAL_STEP	0x10	/* normal debugger-requested single-step */
     68 #define	WATCH_STEP	0x20	/* single-stepping in watchpoint emulation */
     69 #define	CPC_OVERFLOW	0x40	/* performance counters overflowed */
     70 #define	REQUEST_STEP	0x100	/* request pending to single-step this lwp */
     71 #define	REQUEST_NOSTEP	0x200	/* request pending to disable single-step */
     72 #define	ASYNC_HWERR	0x400	/* hardware error has corrupted context  */
     73 
     74 /* fpu_flags */
     75 #define	FPU_EN		0x1	/* flag signifying fpu in use */
     76 #define	FPU_VALID	0x2	/* fpu_regs has valid fpu state */
     77 #define	FPU_MODIFIED	0x4	/* fpu_regs is modified (/proc) */
     78 
     79 #define	FPU_INVALID	0x0	/* fpu context is not in use */
     80 
     81 /* fpu_flags */
     82 
     83 #ifdef	__cplusplus
     84 }
     85 #endif
     86 
     87 #endif	/* _SYS_PCB_H */
     88