usr/src/lib/libbc/libc/sys/common/ucontext.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, 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 #pragma ident   "%Z%%M% %I%     %E% SMI"
  28
  29 /*
  30  * This file contains all the type definitions necessary to
  31  * define the equivalent of SVR4 struct ucontext.
  32  */
  33
  34 /* Definition for alternate stack */
  35 typedef struct sigaltstack {
  36         char *ss_sp;
  37         int  ss_size;
  38         int  ss_flags;
  39 } stack_t;
  40
  41 /* Register window */
  42 struct  rwindow {
  43         int  rw_local[8];            /* locals */
  44         int  rw_in[8];               /* ins */
  45 };
  46
  47 #define   SPARC_MAXREGWINDOW      31 /* max windows in SPARC arch. */
  48
  49 struct gwindows {
  50         int             wbcnt;
  51         int             *spbuf[SPARC_MAXREGWINDOW];
  52         struct rwindow  wbuf[SPARC_MAXREGWINDOW];
  53 };
  54
  55 typedef struct gwindows gwindows_t;
  56
  57 /* Floating point registers */
  58 struct fpq {
  59         unsigned long *fpq_addr;        /* address */
  60         unsigned long fpq_instr;        /* instruction */
  61 };
  62
  63 struct fq {
  64         union {                         /* FPU inst/addr queue */
  65                 double whole;
  66                 struct fpq fpq;
  67         } FQu;
  68 };
  69
  70 struct fpu {
  71         union {                            /* FPU floating point regs */
  72                 unsigned   fpu_regs[32];   /* 32 singles */
  73                 double     fpu_dregs[16];  /* 16 doubles */
  74         } fpu_fr;
  75         struct fq       *fpu_q;             /* ptr to array of FQ entries */
  76         unsigned    fpu_fsr;                /* FPU status register */
  77         unsigned char   fpu_qcnt;           /* # of entries in saved FQ */
  78         unsigned char   fpu_q_entrysize;    /* # of bytes per FQ entry */
  79         unsigned char   fpu_en;             /* flag signifying fpu in use */
  80 };
  81
  82 typedef struct fpu      fpregset_t;
  83
  84 /* Register set */
  85 #define NGREG   19
  86
  87 typedef int  gregset_t[NGREG];
  88
  89 typedef struct mcontext{
  90         gregset_t       gregs;  /* general register set */
  91         gwindows_t      *gwins; /* POSSIBLE pointer to register windows */
  92         fpregset_t      fpregs; /* floating point register set */
  93         long            filler[21];
  94 } mcontext_t;
  95
  96
  97 typedef struct ucontext{
  98         unsigned long   uc_flags;
  99         struct ucontext *uc_link;
 100         unsigned long   uc_sigmask[4];
 101         stack_t         uc_stack;
 102         mcontext_t      uc_mcontext;
 103         long            uc_filler[23];
 104 } ucontext_t;
 105
 106
 107
 108 /* The following is needed by the setjmp/longjmp routines */
 109
 110 #define _ABI_JBLEN      12      /* _JBLEN from base */
 111
 112 /*
 113  * The following structure MUST match the ABI size specifier _SIGJBLEN.
 114  * This is 19 (words). The ABI value for _JBLEN is 12 (words).
 115  * A sigset_t is 16 bytes and a stack_t is 12 bytes.  The layout must
 116  * match sigjmp_struct_t, defined in usr/src/lib/libc/inc/sigjmp_struct.h
 117  */
 118 typedef struct setjmp_struct_t {
 119         int             sjs_flags;      /* JBUF[ 0]     */
 120         int             sjs_sp;         /* JBUF[ 1]     */
 121         int             sjs_pc;         /* JBUF[ 2]     */
 122         int             sjs_fp;         /* JBUF[ 3]     */
 123         int             sjs_i7;         /* JBUF[ 4]     */
 124         void            *sjs_uclink;
 125         unsigned long   sjs_pad[_ABI_JBLEN - 6];
 126         unsigned long   sjs_sigmask[4];
 127         stack_t         sjs_stack;
 128 } setjmp_struct_t;
 129
 130 typedef struct o_setjmp_struct_t {
 131         int             sjs_flags;      /* JBUF[ 0]     */
 132         int             sjs_sp;         /* JBUF[ 1]     */
 133         int             sjs_pc;         /* JBUF[ 2]     */
 134         unsigned long   sjs_sigmask[3];
 135         stack_t         sjs_stack;
 136 } o_setjmp_struct_t;
 137
 138 #define JB_SAVEMASK     0x1
 139 #define UC_SIGMASK      001
 140 #define UC_STACK        002
 141