sys/powerpc/include/asm.h

   1 /*-
   2  * SPDX-License-Identifier: BSD-4-Clause
   3  *
   4  * Copyright (C) 1995, 1996 Wolfgang Solfrank.
   5  * Copyright (C) 1995, 1996 TooLs GmbH.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. All advertising materials mentioning features or use of this software
  17  *    must display the following acknowledgement:
  18  *      This product includes software developed by TooLs GmbH.
  19  * 4. The name of TooLs GmbH may not be used to endorse or promote products
  20  *    derived from this software without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
  23  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  24  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  25  * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  26  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  27  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
  28  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  29  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  30  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  31  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  *
  33  *      $NetBSD: asm.h,v 1.6.18.1 2000/07/25 08:37:14 kleink Exp $
  34  * $FreeBSD$
  35  */
  36
  37 #ifndef _MACHINE_ASM_H_
  38 #define _MACHINE_ASM_H_
  39
  40 #include <sys/cdefs.h>
  41
  42 #if defined(PIC) && !defined(__powerpc64__)
  43 #define PIC_PROLOGUE    XXX
  44 #define PIC_EPILOGUE    XXX
  45 #define PIC_PLT(x)      x@plt
  46 #ifdef  __STDC__
  47 #define PIC_GOT(x)      XXX
  48 #else   /* not __STDC__ */
  49 #define PIC_GOT(x)      XXX
  50 #endif  /* __STDC__ */
  51 #else
  52 #define PIC_PROLOGUE
  53 #define PIC_EPILOGUE
  54 #define PIC_PLT(x)      x
  55 #define PIC_GOT(x)      x
  56 #endif
  57
  58 #define CNAME(csym)             csym
  59 #define ASMNAME(asmsym)         asmsym
  60 #ifdef __powerpc64__
  61 #define HIDENAME(asmsym)        __CONCAT(_,asmsym)
  62 #else
  63 #define HIDENAME(asmsym)        __CONCAT(.,asmsym)
  64 #endif
  65
  66 #if !defined(_CALL_ELF) || _CALL_ELF == 1
  67 #ifdef _KERNEL
  68 /* ELFv1 kernel uses global dot symbols */
  69 #define DOT_LABEL(name)         __CONCAT(.,name)
  70 #define TYPE_ENTRY(name)        .size   name,24; \
  71                                 .type   DOT_LABEL(name),@function; \
  72                                 .globl  DOT_LABEL(name);
  73 #define END_SIZE(name)          .size   DOT_LABEL(name),.-DOT_LABEL(name);
  74 #else /* !_KERNEL */
  75 /* ELFv1 user code uses local function entry points */
  76 #define DOT_LABEL(name)         __CONCAT(.L.,name)
  77 #define TYPE_ENTRY(name)        .type   name,@function;
  78 #define END_SIZE(name)          .size   name,.-DOT_LABEL(name);
  79 #endif /* _KERNEL */
  80 #else
  81 /* ELFv2 doesn't have any of this complication */
  82 #define DOT_LABEL(name)         name
  83 #define TYPE_ENTRY(name)        .type   name,@function;
  84 #define END_SIZE(name)          .size   name,.-DOT_LABEL(name);
  85 #endif
  86
  87 #define _GLOBAL(name) \
  88         .data; \
  89         .p2align 2; \
  90         .globl  name; \
  91         name:
  92
  93 #ifdef __powerpc64__
  94 #define TOC_NAME_FOR_REF(name)  __CONCAT(.L,name)
  95 #define TOC_REF(name)   TOC_NAME_FOR_REF(name)@toc
  96 #define TOC_ENTRY(name) \
  97         .section ".toc","aw"; \
  98         TOC_NAME_FOR_REF(name): \
  99         .tc name[TC],name
 100 #endif
 101
 102 #ifdef __powerpc64__
 103
 104 #if !defined(_CALL_ELF) || _CALL_ELF == 1
 105 #define _ENTRY(name) \
 106         .section ".text"; \
 107         .p2align 2; \
 108         .globl  name; \
 109         .section ".opd","aw"; \
 110         .p2align 3; \
 111         name: \
 112         .quad   DOT_LABEL(name),.TOC.@tocbase,0; \
 113         .previous; \
 114         .p2align 4; \
 115         TYPE_ENTRY(name) \
 116 DOT_LABEL(name):
 117 #define _NAKED_ENTRY(name)      _ENTRY(name)
 118 #else
 119 #define _ENTRY(name) \
 120         .text; \
 121         .p2align 4; \
 122         .globl  name; \
 123         .type   name,@function; \
 124 name: \
 125         addis   %r2, %r12, (.TOC.-name)@ha; \
 126         addi    %r2, %r2, (.TOC.-name)@l; \
 127         .localentry name, .-name;
 128
 129 /* "Naked" function entry.  No TOC prologue for ELFv2. */
 130 #define _NAKED_ENTRY(name) \
 131         .text; \
 132         .p2align 4; \
 133         .globl  name; \
 134         .type   name,@function; \
 135 name: \
 136         .localentry name, .-name;
 137 #endif
 138
 139 #define _END(name) \
 140         .long   0; \
 141         .byte   0,0,0,0,0,0,0,0; \
 142         END_SIZE(name)
 143
 144 #define LOAD_ADDR(reg, var) \
 145         lis     reg, var@highest; \
 146         ori     reg, reg, var@higher; \
 147         rldicr  reg, reg, 32, 31; \
 148         oris    reg, reg, var@h; \
 149         ori     reg, reg, var@l;
 150 #else /* !__powerpc64__ */
 151 #define _ENTRY(name) \
 152         .text; \
 153         .p2align 4; \
 154         .globl  name; \
 155         .type   name,@function; \
 156         name:
 157 #define _END(name)
 158
 159 #define _NAKED_ENTRY(name)      _ENTRY(name)
 160
 161 #define LOAD_ADDR(reg, var) \
 162         lis     reg, var@ha; \
 163         ori     reg, reg, var@l;
 164 #endif /* __powerpc64__ */
 165
 166 #if defined(PROF) || (defined(_KERNEL) && defined(GPROF))
 167 # ifdef __powerpc64__
 168 #   define      _PROF_PROLOGUE  mflr 0;                                 \
 169                                 std 3,48(1);                            \
 170                                 std 4,56(1);                            \
 171                                 std 5,64(1);                            \
 172                                 std 0,16(1);                            \
 173                                 stdu 1,-112(1);                         \
 174                                 bl _mcount;                             \
 175                                 nop;                                    \
 176                                 ld 0,112+16(1);                         \
 177                                 ld 3,112+48(1);                         \
 178                                 ld 4,112+56(1);                         \
 179                                 ld 5,112+64(1);                         \
 180                                 mtlr 0;                                 \
 181                                 addi 1,1,112
 182 # else
 183 #   define      _PROF_PROLOGUE  mflr 0; stw 0,4(1); bl _mcount
 184 # endif
 185 #else
 186 # define        _PROF_PROLOGUE
 187 #endif
 188
 189 #define ASENTRY(y)      _ENTRY(ASMNAME(y)); _PROF_PROLOGUE
 190 #define END(y)          _END(CNAME(y))
 191 #define ENTRY(y)        _ENTRY(CNAME(y)); _PROF_PROLOGUE
 192 #define GLOBAL(y)       _GLOBAL(CNAME(y))
 193
 194 #define ASENTRY_NOPROF(y)       _ENTRY(ASMNAME(y))
 195 #define ENTRY_NOPROF(y)         _ENTRY(CNAME(y))
 196
 197 #define ASMSTR          .asciz
 198
 199 #define RCSID(x)        .text; .asciz x
 200
 201 #undef __FBSDID
 202 #if !defined(lint) && !defined(STRIP_FBSDID)
 203 #define __FBSDID(s)     .ident s
 204 #else
 205 #define __FBSDID(s)     /* nothing */
 206 #endif /* not lint and not STRIP_FBSDID */
 207
 208 #define WEAK_REFERENCE(sym, alias)                              \
 209         .weak alias;                                            \
 210         .equ alias,sym
 211
 212 #ifdef __STDC__
 213 #define WARN_REFERENCES(_sym,_msg)                              \
 214         .section .gnu.warning. ## _sym ; .ascii _msg ; .text
 215 #else
 216 #define WARN_REFERENCES(_sym,_msg)                              \
 217         .section .gnu.warning./**/_sym ; .ascii _msg ; .text
 218 #endif /* __STDC__ */
 219
 220 #endif /* !_MACHINE_ASM_H_ */