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 #if defined(__linux__) && defined(CONFIG_SLS)
  34 #define RET     ret; int3
  35 #else
  36 #define RET     ret
  37 #endif
  38
  39 #ifdef  __cplusplus
  40 extern "C" {
  41 #endif
  42
  43 #ifdef _ASM     /* The remainder of this file is only for assembly files */
  44
  45 /*
  46  * make annoying differences in assembler syntax go away
  47  */
  48
  49 /*
  50  * D16 and A16 are used to insert instructions prefixes; the
  51  * macros help the assembler code be slightly more portable.
  52  */
  53 #if !defined(__GNUC_AS__)
  54 /*
  55  * /usr/ccs/bin/as prefixes are parsed as separate instructions
  56  */
  57 #define D16     data16;
  58 #define A16     addr16;
  59
  60 /*
  61  * (There are some weird constructs in constant expressions)
  62  */
  63 #define _CONST(const)           [const]
  64 #define _BITNOT(const)          -1!_CONST(const)
  65 #define _MUL(a, b)              _CONST(a \* b)
  66
  67 #else
  68 /*
  69  * Why not use the 'data16' and 'addr16' prefixes .. well, the
  70  * assembler doesn't quite believe in real mode, and thus argues with
  71  * us about what we're trying to do.
  72  */
  73 #define D16     .byte   0x66;
  74 #define A16     .byte   0x67;
  75
  76 #define _CONST(const)           (const)
  77 #define _BITNOT(const)          ~_CONST(const)
  78 #define _MUL(a, b)              _CONST(a * b)
  79
  80 #endif
  81
  82 /*
  83  * C pointers are different sizes between i386 and amd64.
  84  * These constants can be used to compute offsets into pointer arrays.
  85  */
  86 #if defined(__amd64)
  87 #define CLONGSHIFT      3
  88 #define CLONGSIZE       8
  89 #define CLONGMASK       7
  90 #elif defined(__i386)
  91 #define CLONGSHIFT      2
  92 #define CLONGSIZE       4
  93 #define CLONGMASK       3
  94 #endif
  95
  96 /*
  97  * Since we know we're either ILP32 or LP64 ..
  98  */
  99 #define CPTRSHIFT       CLONGSHIFT
 100 #define CPTRSIZE        CLONGSIZE
 101 #define CPTRMASK        CLONGMASK
 102
 103 #if CPTRSIZE != (1 << CPTRSHIFT) || CLONGSIZE != (1 << CLONGSHIFT)
 104 #error  "inconsistent shift constants"
 105 #endif
 106
 107 #if CPTRMASK != (CPTRSIZE - 1) || CLONGMASK != (CLONGSIZE - 1)
 108 #error  "inconsistent mask constants"
 109 #endif
 110
 111 #define ASM_ENTRY_ALIGN 16
 112
 113 /*
 114  * SSE register alignment and save areas
 115  */
 116
 117 #define XMM_SIZE        16
 118 #define XMM_ALIGN       16
 119
 120 /*
 121  * ENTRY provides the standard procedure entry code and an easy way to
 122  * insert the calls to mcount for profiling. ENTRY_NP is identical, but
 123  * never calls mcount.
 124  */
 125 #define ENTRY(x) \
 126         .text; \
 127         .align  ASM_ENTRY_ALIGN; \
 128         .globl  x; \
 129         .type   x, @function; \
 130 x:      MCOUNT(x)
 131
 132 #define ENTRY_NP(x) \
 133         .text; \
 134         .align  ASM_ENTRY_ALIGN; \
 135         .globl  x; \
 136         .type   x, @function; \
 137 x:
 138
 139 /*
 140  * ENTRY2 is identical to ENTRY but provides two labels for the entry point.
 141  */
 142 #define ENTRY2(x, y) \
 143         .text;  \
 144         .align  ASM_ENTRY_ALIGN; \
 145         .globl  x, y; \
 146         .type   x, @function; \
 147         .type   y, @function; \
 148 x:; \
 149 y:      MCOUNT(x)
 150
 151 #define ENTRY_NP2(x, y) \
 152         .text; \
 153         .align  ASM_ENTRY_ALIGN; \
 154         .globl  x, y; \
 155         .type   x, @function; \
 156         .type   y, @function; \
 157 x:; \
 158 y:
 159
 160
 161 /*
 162  * SET_SIZE trails a function and set the size for the ELF symbol table.
 163  */
 164 #define SET_SIZE(x) \
 165         .size   x, [.-x]
 166
 167 #endif /* _ASM */
 168
 169 #ifdef  __cplusplus
 170 }
 171 #endif
 172
 173 #endif  /* _IA32_SYS_ASM_LINKAGE_H */