libpthread/linuxthreads/sysdeps/unix/sysv/linux/ia64/pt-initfini.c

   1 /* Special .init and .fini section support for ia64. LinuxThreads version.
   2    Copyright (C) 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it
   6    and/or modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    In addition to the permissions in the GNU Lesser General Public
  11    License, the Free Software Foundation gives you unlimited
  12    permission to link the compiled version of this file with other
  13    programs, and to distribute those programs without any restriction
  14    coming from the use of this file.  (The Lesser General Public
  15    License restrictions do apply in other respects; for example, they
  16    cover modification of the file, and distribution when not linked
  17    into another program.)
  18
  19    The GNU C Library is distributed in the hope that it will be
  20    useful, but WITHOUT ANY WARRANTY; without even the implied warranty
  21    of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22    GNU Lesser General Public License for more details.
  23
  24    You should have received a copy of the GNU Lesser General Public
  25    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  26    see <http://www.gnu.org/licenses/>.  */
  27
  28 /* This file is compiled into assembly code which is then munged by a sed
  29    script into two files: crti.s and crtn.s.
  30
  31    * crti.s puts a function prologue at the beginning of the
  32    .init and .fini sections and defines global symbols for
  33    those addresses, so they can be called as functions.
  34
  35    * crtn.s puts the corresponding function epilogues
  36    in the .init and .fini sections. */
  37
  38 #include <stddef.h>
  39
  40 #ifdef HAVE_INITFINI_ARRAY
  41
  42 # define INIT_NEW_WAY \
  43     ".xdata8 \".init_array\", @fptr(__pthread_initialize_minimal)\n"
  44 # define INIT_OLD_WAY ""
  45 #else
  46 # define INIT_NEW_WAY ""
  47 # define INIT_OLD_WAY \
  48         "\n\
  49         st8 [r12] = gp, -16\n\
  50         br.call.sptk.many b0 = __pthread_initialize_minimal# ;;\n\
  51         ;;\n\
  52         adds r12 = 16, r12\n\
  53         ;;\n\
  54         ld8 gp = [r12]\n\
  55         ;;\n"
  56 #endif
  57
  58 __asm__ ("\n\
  59 \n\
  60 #include \"defs.h\"\n\
  61 \n\
  62 /*@HEADER_ENDS*/\n\
  63 \n\
  64 /*@_init_PROLOG_BEGINS*/\n"
  65         INIT_NEW_WAY
  66         ".section .init\n\
  67         .align 16\n\
  68         .global _init#\n\
  69         .proc _init#\n\
  70 _init:\n\
  71         .prologue\n\
  72         .save ar.pfs, r34\n\
  73         alloc r34 = ar.pfs, 0, 3, 0, 0\n\
  74         .vframe r32\n\
  75         mov r32 = r12\n\
  76         .save rp, r33\n\
  77         mov r33 = b0\n\
  78         .body\n\
  79         adds r12 = -16, r12\n\
  80         ;;\n"
  81         INIT_OLD_WAY
  82         ".endp _init#\n\
  83 \n\
  84 /*@_init_PROLOG_ENDS*/\n\
  85 \n\
  86 /*@_init_EPILOG_BEGINS*/\n\
  87         .section .init\n\
  88         .proc _init#\n\
  89 _init:\n\
  90         .prologue\n\
  91         .save ar.pfs, r34\n\
  92         .vframe r32\n\
  93         .save rp, r33\n\
  94         .body\n\
  95         mov r12 = r32\n\
  96         mov ar.pfs = r34\n\
  97         mov b0 = r33\n\
  98         br.ret.sptk.many b0\n\
  99         .endp _init#\n\
 100 /*@_init_EPILOG_ENDS*/\n\
 101 \n\
 102 /*@_fini_PROLOG_BEGINS*/\n\
 103         .section .fini\n\
 104         .align 16\n\
 105         .global _fini#\n\
 106         .proc _fini#\n\
 107 _fini:\n\
 108         .prologue\n\
 109         .save ar.pfs, r34\n\
 110         alloc r34 = ar.pfs, 0, 3, 0, 0\n\
 111         .vframe r32\n\
 112         mov r32 = r12\n\
 113         .save rp, r33\n\
 114         mov r33 = b0\n\
 115         .body\n\
 116         adds r12 = -16, r12\n\
 117         ;;\n\
 118         .endp _fini#\n\
 119 \n\
 120 /*@_fini_PROLOG_ENDS*/\n\
 121 \n\
 122 /*@_fini_EPILOG_BEGINS*/\n\
 123         .section .fini\n\
 124         .proc _fini#\n\
 125 _fini:\n\
 126         .prologue\n\
 127         .save ar.pfs, r34\n\
 128         .vframe r32\n\
 129         .save rp, r33\n\
 130         .body\n\
 131         mov r12 = r32\n\
 132         mov ar.pfs = r34\n\
 133         mov b0 = r33\n\
 134         br.ret.sptk.many b0\n\
 135         .endp _fini#\n\
 136 \n\
 137 /*@_fini_EPILOG_ENDS*/\n\
 138 \n\
 139 /*@TRAILER_BEGINS*/\n\
 140         .weak   __gmon_start__#\n\
 141 ");