sysdeps/s390/s390-64/initfini.c

   1 /* Special .init and .fini section support for 64 bit S/390.
   2    Copyright (C) 2001 Free Software Foundation, Inc.
   3    Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com).
   4    This file is part of the GNU C Library.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    In addition to the permissions in the GNU Lesser General Public
  12    License, the Free Software Foundation gives you unlimited
  13    permission to link the compiled version of this file with other
  14    programs, and to distribute those programs without any restriction
  15    coming from the use of this file. (The GNU Lesser General Public
  16    License restrictions do apply in other respects; for example, they
  17    cover modification of the file, and distribution when not linked
  18    into another program.)
  19
  20    Note that people who make modified versions of this file are not
  21    obligated to grant this special exception for their modified
  22    versions; it is their choice whether to do so. The GNU Lesser
  23    General Public License gives permission to release a modified
  24    version without this exception; this exception also makes it
  25    possible to release a modified version which carries forward this
  26    exception.
  27
  28    The GNU C Library is distributed in the hope that it will be useful,
  29    but WITHOUT ANY WARRANTY; without even the implied warranty of
  30    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  31    Lesser General Public License for more details.
  32
  33    You should have received a copy of the GNU Lesser General Public
  34    License along with the GNU C Library; if not, write to the Free
  35    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  36    02111-1307 USA.  */
  37
  38 /* This file is compiled into assembly code which is then munged by a sed
  39    script into two files: crti.s and crtn.s.
  40
  41    * crti.s puts a function prologue at the beginning of the
  42    .init and .fini sections and defines global symbols for
  43    those addresses, so they can be called as functions.
  44
  45    * crtn.s puts the corresponding function epilogues
  46    in the .init and .fini sections. */
  47
  48 __asm__ ("\
  49 \n\
  50 #include \"defs.h\"\n\
  51 \n\
  52 /*@HEADER_ENDS*/\n\
  53 \n\
  54 /*@TESTS_BEGIN*/\n\
  55 \n\
  56 /*@TESTS_END*/\n\
  57 \n\
  58 /*@_init_PROLOG_BEGINS*/\n\
  59 \n\
  60         .section .init\n\
  61 #NO_APP\n\
  62         .align 4\n\
  63 .globl _init\n\
  64         .type    _init,@function\n\
  65 _init:\n\
  66 #       leaf function           0\n\
  67 #       automatics              0\n\
  68 #       outgoing args           0\n\
  69 #       need frame pointer      0\n\
  70 #       call alloca             0\n\
  71 #       has varargs             0\n\
  72 #       incoming args (stack)   0\n\
  73 #       function length         36\n\
  74         STMG    6,15,48(15)\n\
  75         LGR     1,15\n\
  76         AGHI    15,-160\n\
  77         STG     1,0(15)\n\
  78         LARL    12,_GLOBAL_OFFSET_TABLE_\n\
  79         LARL    1,__gmon_start__@GOTENT\n\
  80         LG      1,0(1)\n\
  81         LTGR    1,1\n\
  82         JE      .L22\n\
  83         BASR    14,1\n\
  84 .L22:\n\
  85 #APP\n\
  86         .align 4,0x07\n\
  87         END_INIT\n\
  88 \n\
  89 /*@_init_PROLOG_ENDS*/\n\
  90 \n\
  91 /*@_init_EPILOG_BEGINS*/\n\
  92         .align 4\n\
  93         .section .init\n\
  94 #NO_APP\n\
  95         .align 4\n\
  96         LG      4,272(15)\n\
  97         LMG     6,15,208(15)\n\
  98         BR      4\n\
  99 #APP\n\
 100         END_INIT\n\
 101 \n\
 102 /*@_init_EPILOG_ENDS*/\n\
 103 \n\
 104 /*@_fini_PROLOG_BEGINS*/\n\
 105         .section .fini\n\
 106 #NO_APP\n\
 107         .align 4\n\
 108 .globl _fini\n\
 109         .type    _fini,@function\n\
 110 _fini:\n\
 111 #       leaf function           0\n\
 112 #       automatics              0\n\
 113 #       outgoing args           0\n\
 114 #       need frame pointer      0\n\
 115 #       call alloca             0\n\
 116 #       has varargs             0\n\
 117 #       incoming args (stack)   0\n\
 118 #       function length         30\n\
 119         STMG    6,15,48(15)\n\
 120         LGR     1,15\n\
 121         AGHI    15,-160\n\
 122         STG     1,0(15)\n\
 123         LARL    12,_GLOBAL_OFFSET_TABLE_\n\
 124 #APP\n\
 125         .align 4,0x07\n\
 126         END_FINI\n\
 127 \n\
 128 /*@_fini_PROLOG_ENDS*/\n\
 129 \n\
 130 /*@_fini_EPILOG_BEGINS*/\n\
 131         .align 4\n\
 132         .section .fini\n\
 133 #NO_APP\n\
 134         .align 4\n\
 135         LG      4,272(15)\n\
 136         LMG     6,15,208(15)\n\
 137         BR      4\n\
 138 #APP\n\
 139         END_FINI\n\
 140 \n\
 141 /*@_fini_EPILOG_ENDS*/\n\
 142 \n\
 143         /*@TRAILER_BEGINS*/\
 144 ");