arch/x86/include/sys/pcb.h

   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 (c) 1992, 2010, Oracle and/or its affiliates. All rights reserved.
  24  */
  25
  26 #ifndef _SYS_PCB_H
  27 #define _SYS_PCB_H
  28
  29 #include <sys/regset.h>
  30 #include <sys/segments.h>
  31 #ifndef _ASM
  32 #include <sys/fp.h>     /* kfpu_t */
  33 #endif
  34
  35 #ifdef  __cplusplus
  36 extern "C" {
  37 #endif
  38
  39 #ifndef _ASM
  40 typedef struct fpu_ctx {
  41         kfpu_t          fpu_regs;       /* kernel save area for FPU */
  42         uint64_t        fpu_xsave_mask; /* xsave mask for FPU/SSE/AVX */
  43 #if defined(__i386)
  44         uint64_t        fpu_padding;    /* fix 32bit libmicro regression */
  45 #endif
  46         uint_t          fpu_flags;      /* FPU state flags */
  47 } fpu_ctx_t;
  48
  49 typedef struct pcb {
  50         fpu_ctx_t       pcb_fpu;        /* fpu state */
  51         uint_t          pcb_flags;      /* state flags; cleared on fork */
  52         greg_t          pcb_drstat;     /* status debug register (%dr6) */
  53         unsigned char   pcb_instr;      /* /proc: instruction at stop */
  54 #if defined(__amd64)
  55         unsigned char   pcb_rupdate;    /* new register values in pcb -> regs */
  56         uintptr_t       pcb_fsbase;
  57         uintptr_t       pcb_gsbase;
  58         selector_t      pcb_ds;
  59         selector_t      pcb_es;
  60         selector_t      pcb_fs;
  61         selector_t      pcb_gs;
  62 #endif /* __amd64 */
  63         user_desc_t     pcb_fsdesc;     /* private per-lwp %fs descriptors */
  64         user_desc_t     pcb_gsdesc;     /* private per-lwp %gs descriptors */
  65 } pcb_t;
  66
  67 #endif /* ! _ASM */
  68
  69 /* pcb_flags */
  70 #define DEBUG_PENDING   0x02    /* single-step of lcall for a sys call */
  71 #define PRSTOP_CALLED   0x04    /* prstop() has been called for this lwp */
  72 #define INSTR_VALID     0x08    /* value in pcb_instr is valid (/proc) */
  73 #define NORMAL_STEP     0x10    /* normal debugger-requested single-step */
  74 #define WATCH_STEP      0x20    /* single-stepping in watchpoint emulation */
  75 #define CPC_OVERFLOW    0x40    /* performance counters overflowed */
  76 #define REQUEST_STEP    0x100   /* request pending to single-step this lwp */
  77 #define REQUEST_NOSTEP  0x200   /* request pending to disable single-step */
  78 #define ASYNC_HWERR     0x400   /* hardware error has corrupted context  */
  79
  80 /* fpu_flags */
  81 #define FPU_EN          0x1     /* flag signifying fpu in use */
  82 #define FPU_VALID       0x2     /* fpu_regs has valid fpu state */
  83 #define FPU_MODIFIED    0x4     /* fpu_regs is modified (/proc) */
  84
  85 #define FPU_INVALID     0x0     /* fpu context is not in use */
  86
  87 /* fpu_flags */
  88
  89 #ifdef  __cplusplus
  90 }
  91 #endif
  92
  93 #endif  /* _SYS_PCB_H */