lib/csu/alpha/dot_init.h

   1 /* $NetBSD: dot_init.h,v 1.8 2008/05/10 15:31:03 martin Exp $ */
   2
   3 /*-
   4  * Copyright (c) 2001 Ross Harvey
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. All advertising materials mentioning features or use of this software
  16  *    must display the following acknowledgement:
  17  *      This product includes software developed by the NetBSD
  18  *      Foundation, Inc. and its contributors.
  19  * 4. Neither the name of The NetBSD Foundation nor the names of its
  20  *    contributors may be used to endorse or promote products derived
  21  *    from this software without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  24  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  25  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  26  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  27  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  28  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  29  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  30  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  31  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  32  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  33  * POSSIBILITY OF SUCH DAMAGE.
  34  */
  35
  36 #include <sys/cdefs.h>                  /* RCS ID & Copyright macro defns */
  37 #include <machine/asm.h>
  38
  39 #define ASM_SETUP "sp = $30; gp = $29; pv = $27; ra = $26 \n"
  40
  41 #define MD_SECTION_PROLOGUE(sect, entry_pt)             \
  42                 __asm (                                 \
  43                 ASM_SETUP                               \
  44                 ".section "#sect",\"ax\",@progbits      \n"\
  45                 ".global "#entry_pt"                    \n"\
  46                 #entry_pt":                             \n"\
  47                 "       ldgp    gp, 0(pv)               \n"\
  48                 "       lda     sp, -32(sp)             \n"\
  49                 "       stq     ra, 0(sp)               \n"\
  50                 "       stq     gp, 8(sp)               \n"\
  51                 "       .align  5                       \n"\
  52                 "       /* fall thru */                 \n"\
  53                 ".previous")
  54
  55 #define MD_SECTION_EPILOGUE(sect)                       \
  56                 __asm (                                 \
  57                 ASM_SETUP                               \
  58                 ".section "#sect",\"ax\",@progbits      \n"\
  59                 "       ldq     gp, 8(sp)               \n"\
  60                 "       ldq     ra, 0(sp)               \n"\
  61                 "       lda     sp, 32(sp)              \n"\
  62                 "       RET                             \n"\
  63                 ".previous")
  64
  65 #define MD_INIT_SECTION_PROLOGUE MD_SECTION_PROLOGUE(.init, _init)
  66 #define MD_FINI_SECTION_PROLOGUE MD_SECTION_PROLOGUE(.fini, _fini)
  67
  68 #define MD_INIT_SECTION_EPILOGUE MD_SECTION_EPILOGUE(.init)
  69 #define MD_FINI_SECTION_EPILOGUE MD_SECTION_EPILOGUE(.fini)
  70
  71 /* We assume we need to reload our GP. */
  72 #define MD_CALL_STATIC_FUNCTION(section, func) \
  73 __asm(".section " #section "\n"         \
  74 "    br $29, 1f         \n"             \
  75 "1:  ldgp $29, 0($29)   \n"             \
  76 "    unop               \n"             \
  77 "    jsr $26, " #func "\n"              \
  78 "    .align 3; .previous");