arch/x86/include/sys/regset.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  * Copyright 2015 Nexenta Systems, Inc.  All rights reserved.
  23  *
  24  * Copyright (c) 1989, 2010, Oracle and/or its affiliates. All rights reserved.
  25  */
  26 /*      Copyright (c) 1990, 1991 UNIX System Laboratories, Inc. */
  27
  28 /*      Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T         */
  29 /*      All Rights Reserved     */
  30
  31 #ifndef _SYS_REGSET_H
  32 #define _SYS_REGSET_H
  33
  34 #include <sys/feature_tests.h>
  35
  36 #if !defined(_ASM)
  37 #include <sys/types.h>
  38 #endif
  39 #include <sys/mcontext.h>
  40
  41 #ifdef __cplusplus
  42 extern "C" {
  43 #endif
  44
  45 /*
  46  * The names and offsets defined here should be specified by the
  47  * AMD64 ABI suppl.
  48  *
  49  * We make fsbase and gsbase part of the lwp context (since they're
  50  * the only way to access the full 64-bit address range via the segment
  51  * registers) and thus belong here too.  However we treat them as
  52  * read-only; if %fs or %gs are updated, the results of the descriptor
  53  * table lookup that those updates implicitly cause will be reflected
  54  * in the corresponding fsbase and/or gsbase values the next time the
  55  * context can be inspected.  However it is NOT possible to override
  56  * the fsbase/gsbase settings via this interface.
  57  *
  58  * Direct modification of the base registers (thus overriding the
  59  * descriptor table base address) can be achieved with _lwp_setprivate.
  60  */
  61
  62 #define REG_GSBASE      27
  63 #define REG_FSBASE      26
  64 #define REG_DS          25
  65 #define REG_ES          24
  66
  67 #define REG_GS          23
  68 #define REG_FS          22
  69 #define REG_SS          21
  70 #define REG_RSP         20
  71 #define REG_RFL         19
  72 #define REG_CS          18
  73 #define REG_RIP         17
  74 #define REG_ERR         16
  75 #define REG_TRAPNO      15
  76 #define REG_RAX         14
  77 #define REG_RCX         13
  78 #define REG_RDX         12
  79 #define REG_RBX         11
  80 #define REG_RBP         10
  81 #define REG_RSI         9
  82 #define REG_RDI         8
  83 #define REG_R8          7
  84 #define REG_R9          6
  85 #define REG_R10         5
  86 #define REG_R11         4
  87 #define REG_R12         3
  88 #define REG_R13         2
  89 #define REG_R14         1
  90 #define REG_R15         0
  91
  92 /*
  93  * The names and offsets defined here are specified by i386 ABI suppl.
  94  */
  95
  96 #define SS              18      /* only stored on a privilege transition */
  97 #define UESP            17      /* only stored on a privilege transition */
  98 #define EFL             16
  99 #define CS              15
 100 #define EIP             14
 101 #define ERR             13
 102 #define TRAPNO          12
 103 #define EAX             11
 104 #define ECX             10
 105 #define EDX             9
 106 #define EBX             8
 107 #define ESP             7
 108 #define EBP             6
 109 #define ESI             5
 110 #define EDI             4
 111 #define DS              3
 112 #define ES              2
 113 #define FS              1
 114 #define GS              0
 115
 116 /* aliases for portability */
 117
 118 #if defined(__amd64)
 119
 120 #define REG_PC  REG_RIP
 121 #define REG_FP  REG_RBP
 122 #define REG_SP  REG_RSP
 123 #define REG_PS  REG_RFL
 124 #define REG_R0  REG_RAX
 125 #define REG_R1  REG_RDX
 126
 127 #else   /* __i386 */
 128
 129 #define REG_PC  EIP
 130 #define REG_FP  EBP
 131 #define REG_SP  UESP
 132 #define REG_PS  EFL
 133 #define REG_R0  EAX
 134 #define REG_R1  EDX
 135
 136 #endif  /* __i386 */
 137
 138 #define NGREG   _NGREG
 139
 140 #if !defined(_ASM)
 141
 142 #ifdef  __i386
 143 /*
 144  * (This structure definition is specified in the i386 ABI supplement)
 145  * It's likely we can just get rid of the struct __old_fpu or maybe
 146  * move it to $SRC/uts/intel/ia32/os/fpu.c which appears to be the
 147  * only place that uses it.  See: www.illumos.org/issues/6284
 148  */
 149 typedef struct __old_fpu {
 150         union {
 151                 struct __old_fpchip_state       /* fp extension state */
 152                 {
 153                         int     state[27];      /* 287/387 saved state */
 154                         int     status;         /* status word saved at */
 155                                                 /* exception */
 156                 } fpchip_state;
 157                 struct __old_fp_emul_space      /* for emulator(s) */
 158                 {
 159                         char    fp_emul[246];
 160                         char    fp_epad[2];
 161                 } fp_emul_space;
 162                 int     f_fpregs[62];           /* union of the above */
 163         } fp_reg_set;
 164         long            f_wregs[33];            /* saved weitek state */
 165 } __old_fpregset_t;
 166 #endif  /* __i386 */
 167
 168 #if defined(__amd64)
 169 #define _NDEBUGREG      16
 170 #else
 171 #define _NDEBUGREG      8
 172 #endif
 173
 174 typedef struct dbregset {
 175         unsigned long   debugreg[_NDEBUGREG];
 176 } dbregset_t;
 177
 178 #endif  /* _ASM */
 179
 180 /*
 181  * The version of privregs.h that is used on implementations that run on
 182  * processors that support the AMD64 instruction set is deliberately not
 183  * imported here.
 184  *
 185  * The amd64 'struct regs' definition may -not- compatible with either
 186  * 32-bit or 64-bit core file contents, nor with the ucontext.  As a result,
 187  * the 'regs' structure cannot be used portably by applications, and should
 188  * only be used by the kernel implementation.
 189  *
 190  * The inclusion of the i386 version of privregs.h allows for some limited
 191  * source compatibility with 32-bit applications who expect to use
 192  * 'struct regs' to match the context of a 32-bit core file, or a ucontext_t.
 193  *
 194  * Note that the ucontext_t actually describes the general register in terms
 195  * of the gregset_t data type, as described in this file.  Note also
 196  * that the core file content is defined by core(4) in terms of data types
 197  * defined by procfs -- see proc(4).
 198  */
 199 #if defined(__i386) && \
 200         (!defined(_KERNEL) && !defined(_XPG4_2) || defined(__EXTENSIONS__))
 201 #include <sys/privregs.h>
 202 #endif  /* __i386 (!_KERNEL && !_XPG4_2 || __EXTENSIONS__) */
 203
 204 #ifdef  __cplusplus
 205 }
 206 #endif
 207
 208 #endif  /* _SYS_REGSET_H */