lib/libspl/include/os/freebsd/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 https://opensource.org/licenses/CDDL-1.0.
  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 #if defined(__linux__) && defined(CONFIG_SLS)
  31 #define RET     ret; int3
  32 #else
  33 #define RET     ret
  34 #endif
  35
  36 /* Tell compiler to call assembler like Unix */
  37 #undef ASMABI
  38 #define ASMABI  __attribute__((sysv_abi))
  39
  40 #define ENDBR
  41
  42 #define SECTION_TEXT .text
  43 #define SECTION_STATIC .data
  44
  45 #ifdef  __cplusplus
  46 extern "C" {
  47 #endif
  48
  49 #ifdef _ASM     /* The remainder of this file is only for assembly files */
  50
  51 /*
  52  * make annoying differences in assembler syntax go away
  53  */
  54
  55 /*
  56  * D16 and A16 are used to insert instructions prefixes; the
  57  * macros help the assembler code be slightly more portable.
  58  */
  59 #if !defined(__GNUC_AS__)
  60 /*
  61  * /usr/ccs/bin/as prefixes are parsed as separate instructions
  62  */
  63 #define D16     data16;
  64 #define A16     addr16;
  65
  66 /*
  67  * (There are some weird constructs in constant expressions)
  68  */
  69 #define _CONST(const)           [const]
  70 #define _BITNOT(const)          -1!_CONST(const)
  71 #define _MUL(a, b)              _CONST(a \* b)
  72
  73 #else
  74 /*
  75  * Why not use the 'data16' and 'addr16' prefixes .. well, the
  76  * assembler doesn't quite believe in real mode, and thus argues with
  77  * us about what we're trying to do.
  78  */
  79 #define D16     .byte   0x66;
  80 #define A16     .byte   0x67;
  81
  82 #define _CONST(const)           (const)
  83 #define _BITNOT(const)          ~_CONST(const)
  84 #define _MUL(a, b)              _CONST(a * b)
  85
  86 #endif
  87
  88 /*
  89  * C pointers are different sizes between i386 and amd64.
  90  * These constants can be used to compute offsets into pointer arrays.
  91  */
  92 #if defined(__amd64)
  93 #define CLONGSHIFT      3
  94 #define CLONGSIZE       8
  95 #define CLONGMASK       7
  96 #elif defined(__i386)
  97 #define CLONGSHIFT      2
  98 #define CLONGSIZE       4
  99 #define CLONGMASK       3
 100 #endif
 101
 102 /*
 103  * Since we know we're either ILP32 or LP64 ..
 104  */
 105 #define CPTRSHIFT       CLONGSHIFT
 106 #define CPTRSIZE        CLONGSIZE
 107 #define CPTRMASK        CLONGMASK
 108
 109 #if CPTRSIZE != (1 << CPTRSHIFT) || CLONGSIZE != (1 << CLONGSHIFT)
 110 #error  "inconsistent shift constants"
 111 #endif
 112
 113 #if CPTRMASK != (CPTRSIZE - 1) || CLONGMASK != (CLONGSIZE - 1)
 114 #error  "inconsistent mask constants"
 115 #endif
 116
 117 #define ASM_ENTRY_ALIGN 16
 118
 119 /*
 120  * SSE register alignment and save areas
 121  */
 122
 123 #define XMM_SIZE        16
 124 #define XMM_ALIGN       16
 125
 126 /*
 127  * ENTRY provides the standard procedure entry code and an easy way to
 128  * insert the calls to mcount for profiling. ENTRY_NP is identical, but
 129  * never calls mcount.
 130  */
 131 #define ENTRY(x) \
 132         .text; \
 133         .balign ASM_ENTRY_ALIGN; \
 134         .globl  x; \
 135 x:      MCOUNT(x)
 136
 137 #define ENTRY_NP(x) \
 138         .text; \
 139         .balign ASM_ENTRY_ALIGN; \
 140         .globl  x; \
 141 x:
 142
 143 #define ENTRY_ALIGN(x, a) \
 144         .text; \
 145         .balign a; \
 146         .globl  x; \
 147 x:
 148
 149 #define FUNCTION(x) \
 150         .type   x, @function; \
 151 x:
 152
 153 /*
 154  * ENTRY2 is identical to ENTRY but provides two labels for the entry point.
 155  */
 156 #define ENTRY2(x, y) \
 157         .text;  \
 158         .balign ASM_ENTRY_ALIGN; \
 159         .globl  x, y; \
 160 x:; \
 161 y:      MCOUNT(x)
 162
 163 #define ENTRY_NP2(x, y) \
 164         .text; \
 165         .balign ASM_ENTRY_ALIGN; \
 166         .globl  x, y; \
 167 x:; \
 168 y:
 169
 170
 171 /*
 172  * SET_SIZE trails a function and set the size for the ELF symbol table.
 173  */
 174 #define SET_SIZE(x)
 175
 176 #define SET_OBJ(x)
 177
 178 #endif /* _ASM */
 179
 180 #ifdef  __cplusplus
 181 }
 182 #endif
 183
 184 #endif  /* _IA32_SYS_ASM_LINKAGE_H */