usr/src/uts/intel/sys/pcb.h

root/usr/src/uts/intel/sys/pcb.h
/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */

/*
 * Copyright (c) 1992, 2010, Oracle and/or its affiliates. All rights reserved.
 * Copyright 2020 Joyent, Inc.
 */

#ifndef _SYS_PCB_H
#define _SYS_PCB_H

#include <sys/regset.h>
#include <sys/segments.h>
#ifndef _ASM
#include <sys/fp.h>     /* kfpu_t */
#endif

#ifdef  __cplusplus
extern "C" {
#endif

#ifndef _ASM
typedef struct fpu_ctx {
        kfpu_t          fpu_regs;       /* kernel save area for FPU */
        uint64_t        fpu_xsave_mask; /* xsave mask for FPU/SSE/AVX */
        uint_t          fpu_flags;      /* FPU state flags */
        void            *fpu_signal;    /* copyin area for signal handling */
} fpu_ctx_t;

typedef struct pcb {
        fpu_ctx_t       pcb_fpu;        /* fpu state */
        uint_t          pcb_flags;      /* state flags; cleared on fork */
        greg_t          pcb_drstat;     /* status debug register (%dr6) */
        unsigned char   pcb_instr;      /* /proc: instruction at stop */
        unsigned char   pcb_rupdate;    /* new register values in pcb -> regs */
        uintptr_t       pcb_fsbase;
        uintptr_t       pcb_gsbase;
        selector_t      pcb_ds;
        selector_t      pcb_es;
        selector_t      pcb_fs;
        selector_t      pcb_gs;
        user_desc_t     pcb_fsdesc;     /* private per-lwp %fs descriptors */
        user_desc_t     pcb_gsdesc;     /* private per-lwp %gs descriptors */
} pcb_t;

#endif /* ! _ASM */

/* pcb_flags */
#define DEBUG_PENDING   0x02    /* single-step of lcall for a sys call */
#define PRSTOP_CALLED   0x04    /* prstop() has been called for this lwp */
#define INSTR_VALID     0x08    /* value in pcb_instr is valid (/proc) */
#define NORMAL_STEP     0x10    /* normal debugger-requested single-step */
#define WATCH_STEP      0x20    /* single-stepping in watchpoint emulation */
#define CPC_OVERFLOW    0x40    /* performance counters overflowed */
#define REQUEST_STEP    0x100   /* request pending to single-step this lwp */
#define REQUEST_NOSTEP  0x200   /* request pending to disable single-step */
#define ASYNC_HWERR     0x400   /* hardware error has corrupted context  */

/* pcb_rupdate values */
#define PCB_UPDATE_SEGS 0x01    /* Update segment registers */
#define PCB_UPDATE_FPU  0x02    /* Update FPU registers */

#define PCB_SET_UPDATE_SEGS(pcb)        ((pcb)->pcb_rupdate |= PCB_UPDATE_SEGS)
#define PCB_SET_UPDATE_FPU(pcb)         ((pcb)->pcb_rupdate |= PCB_UPDATE_FPU)
#define PCB_NEED_UPDATE_SEGS(pcb)       \
        (((pcb)->pcb_rupdate & PCB_UPDATE_SEGS) != 0)
#define PCB_NEED_UPDATE_FPU(pcb)        \
        (((pcb)->pcb_rupdate & PCB_UPDATE_FPU) != 0)
#define PCB_NEED_UPDATE(pcb)            \
        (PCB_NEED_UPDATE_FPU(pcb) || PCB_NEED_UPDATE_SEGS(pcb))
#define PCB_CLEAR_UPDATE_SEGS(pcb)      ((pcb)->pcb_rupdate &= ~PCB_UPDATE_SEGS)
#define PCB_CLEAR_UPDATE_FPU(pcb)       ((pcb)->pcb_rupdate &= ~PCB_UPDATE_FPU)

/* fpu_flags */
#define FPU_EN          0x01    /* FPU in use (user or kernel) */
#define FPU_VALID       0x02    /* fpu_regs has valid fpu state */
#define FPU_MODIFIED    0x04    /* fpu_regs is modified (/proc) */
#define FPU_KERNEL      0x08    /* Kernel is using the FPU */

#define FPU_INVALID     0x0     /* fpu context is not in use */

/* fpu_flags */

#ifdef  __cplusplus
}
#endif

#endif  /* _SYS_PCB_H */
Illumos
