module/icp/include/sys/ia32/asm_linkage.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 2008 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 #ifndef _IA32_SYS_ASM_LINKAGE_H
  28 #define _IA32_SYS_ASM_LINKAGE_H
  29
  30 #include <sys/stack.h>
  31 #include <sys/trap.h>
  32
  33 #ifdef  __cplusplus
  34 extern "C" {
  35 #endif
  36
  37 #ifdef _ASM     /* The remainder of this file is only for assembly files */
  38
  39 /*
  40  * make annoying differences in assembler syntax go away
  41  */
  42
  43 /*
  44  * D16 and A16 are used to insert instructions prefixes; the
  45  * macros help the assembler code be slightly more portable.
  46  */
  47 #if !defined(__GNUC_AS__)
  48 /*
  49  * /usr/ccs/bin/as prefixes are parsed as separate instructions
  50  */
  51 #define D16     data16;
  52 #define A16     addr16;
  53
  54 /*
  55  * (There are some weird constructs in constant expressions)
  56  */
  57 #define _CONST(const)           [const]
  58 #define _BITNOT(const)          -1!_CONST(const)
  59 #define _MUL(a, b)              _CONST(a \* b)
  60
  61 #else
  62 /*
  63  * Why not use the 'data16' and 'addr16' prefixes .. well, the
  64  * assembler doesn't quite believe in real mode, and thus argues with
  65  * us about what we're trying to do.
  66  */
  67 #define D16     .byte   0x66;
  68 #define A16     .byte   0x67;
  69
  70 #define _CONST(const)           (const)
  71 #define _BITNOT(const)          ~_CONST(const)
  72 #define _MUL(a, b)              _CONST(a * b)
  73
  74 #endif
  75
  76 /*
  77  * C pointers are different sizes between i386 and amd64.
  78  * These constants can be used to compute offsets into pointer arrays.
  79  */
  80 #if defined(__amd64)
  81 #define CLONGSHIFT      3
  82 #define CLONGSIZE       8
  83 #define CLONGMASK       7
  84 #elif defined(__i386)
  85 #define CLONGSHIFT      2
  86 #define CLONGSIZE       4
  87 #define CLONGMASK       3
  88 #endif
  89
  90 /*
  91  * Since we know we're either ILP32 or LP64 ..
  92  */
  93 #define CPTRSHIFT       CLONGSHIFT
  94 #define CPTRSIZE        CLONGSIZE
  95 #define CPTRMASK        CLONGMASK
  96
  97 #if CPTRSIZE != (1 << CPTRSHIFT) || CLONGSIZE != (1 << CLONGSHIFT)
  98 #error  "inconsistent shift constants"
  99 #endif
 100
 101 #if CPTRMASK != (CPTRSIZE - 1) || CLONGMASK != (CLONGSIZE - 1)
 102 #error  "inconsistent mask constants"
 103 #endif
 104
 105 #define ASM_ENTRY_ALIGN 16
 106
 107 /*
 108  * SSE register alignment and save areas
 109  */
 110
 111 #define XMM_SIZE        16
 112 #define XMM_ALIGN       16
 113
 114 /*
 115  * ENTRY provides the standard procedure entry code and an easy way to
 116  * insert the calls to mcount for profiling. ENTRY_NP is identical, but
 117  * never calls mcount.
 118  */
 119 #define ENTRY(x) \
 120         .text; \
 121         .align  ASM_ENTRY_ALIGN; \
 122         .globl  x; \
 123         .type   x, @function; \
 124 x:      MCOUNT(x)
 125
 126 #define ENTRY_NP(x) \
 127         .text; \
 128         .align  ASM_ENTRY_ALIGN; \
 129         .globl  x; \
 130         .type   x, @function; \
 131 x:
 132
 133 /*
 134  * ENTRY2 is identical to ENTRY but provides two labels for the entry point.
 135  */
 136 #define ENTRY2(x, y) \
 137         .text;  \
 138         .align  ASM_ENTRY_ALIGN; \
 139         .globl  x, y; \
 140         .type   x, @function; \
 141         .type   y, @function; \
 142 x:; \
 143 y:      MCOUNT(x)
 144
 145 #define ENTRY_NP2(x, y) \
 146         .text; \
 147         .align  ASM_ENTRY_ALIGN; \
 148         .globl  x, y; \
 149         .type   x, @function; \
 150         .type   y, @function; \
 151 x:; \
 152 y:
 153
 154
 155 /*
 156  * SET_SIZE trails a function and set the size for the ELF symbol table.
 157  */
 158 #define SET_SIZE(x) \
 159         .size   x, [.-x]
 160
 161 #endif /* _ASM */
 162
 163 #ifdef  __cplusplus
 164 }
 165 #endif
 166
 167 #endif  /* _IA32_SYS_ASM_LINKAGE_H */