sysdeps/sh/elf/initfini.c

   1 /* Special .init and .fini section support for SH.
   2    Copyright (C) 2000, 2002, 2009 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 and/or
   6    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 GNU 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    Note that people who make modified versions of this file are not
  20    obligated to grant this special exception for their modified
  21    versions; it is their choice whether to do so. The GNU Lesser
  22    General Public License gives permission to release a modified
  23    version without this exception; this exception also makes it
  24    possible to release a modified version which carries forward this
  25    exception.
  26
  27    The GNU C Library is distributed in the hope that it will be useful,
  28    but WITHOUT ANY WARRANTY; without even the implied warranty of
  29    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  30    Lesser General Public License for more details.
  31
  32    You should have received a copy of the GNU Lesser General Public
  33    License along with the GNU C Library; if not, write to the Free
  34    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  35    02111-1307 USA.  */
  36
  37 /* This file is compiled into assembly code which is then munged by a sed
  38    script into two files: crti.s and crtn.s.
  39
  40    * crti.s puts a function prologue at the beginning of the
  41    .init and .fini sections and defines global symbols for
  42    those addresses, so they can be called as functions.
  43
  44    * crtn.s puts the corresponding function epilogues
  45    in the .init and .fini sections. */
  46
  47 __asm__ ("\
  48 \n\
  49 #include \"defs.h\"\n\
  50 \n\
  51 /*@HEADER_ENDS*/\n\
  52 \n\
  53 /*@TESTS_BEGIN*/\n\
  54         .align 5\n\
  55 /*@TESTS_END*/\n\
  56 \n\
  57 /*@_init_PROLOG_BEGINS*/\n\
  58         .section        .init,\"ax\",@progbits\n\
  59         .align 5\n\
  60         .global _init\n\
  61         .type   _init, @function\n\
  62 _init:\n\
  63         mov.l   r12,@-r15\n\
  64         mova    .L12,r0\n\
  65         mov.l   .L12,r12\n\
  66         mov.l   r14,@-r15\n\
  67         add     r0,r12\n\
  68         mov.l   .L13,r0\n\
  69         sts.l   pr,@-r15\n\
  70         mov.l   @(r0,r12),r1\n\
  71         tst     r1,r1\n\
  72         bt/s    .L8\n\
  73         mov     r15,r14\n\
  74         mov.l   .L14,r1\n\
  75         bsrf    r1\n\
  76 .LPCS0:\n\
  77         nop\n\
  78 .L8:\n\
  79         bra     1f\n\
  80         nop\n\
  81         .align 2\n\
  82 .L12:\n\
  83         .long   _GLOBAL_OFFSET_TABLE_\n\
  84 .L13:\n\
  85         .long   __gmon_start__@GOT\n\
  86 .L14:\n\
  87         .long   __gmon_start__@PLT-(.LPCS0+2-(.))\n\
  88 1:\n\
  89         ALIGN\n\
  90         END_INIT\n\
  91 \n\
  92 /*@_init_PROLOG_ENDS*/\n\
  93 \n\
  94 /*@_init_EPILOG_BEGINS*/\n\
  95         .section .init\n\
  96         mov     r14,r15\n\
  97         lds.l   @r15+,pr\n\
  98         mov.l   @r15+,r14\n\
  99         mov.l   @r15+,r12\n\
 100         rts     \n\
 101         nop\n\
 102         END_INIT\n\
 103 \n\
 104 /*@_init_EPILOG_ENDS*/\n\
 105 \n\
 106 /*@_fini_PROLOG_BEGINS*/\n\
 107         .section        .fini,\"ax\",@progbits\n\
 108         .align 5\n\
 109         .global _fini\n\
 110         .type   _fini, @function\n\
 111 _fini:\n\
 112         mov.l   r12,@-r15\n\
 113         mova    .L19,r0\n\
 114         mov.l   r14,@-r15\n\
 115         sts.l   pr,@-r15\n\
 116         mov.l   .L19,r12\n\
 117         mov     r15,r14\n\
 118         add     r0,r12\n\
 119         bra     0f\n\
 120         nop\n\
 121         .align 2\n\
 122 .L19:\n\
 123         .long   _GLOBAL_OFFSET_TABLE_\n\
 124 0:\n\
 125         ALIGN\n\
 126         END_FINI\n\
 127 \n\
 128 /*@_fini_PROLOG_ENDS*/\n\
 129         mov.l   .L20,r1\n\
 130         bsrf    r1\n\
 131 .LPCS1:\n\
 132         nop\n\
 133         bra     1f\n\
 134         nop\n\
 135         .align 2\n\
 136 .L20:\n\
 137         .long   i_am_not_a_leaf@PLT-(.LPCS1+2-(.))\n\
 138 1:\n\
 139 /*@_fini_EPILOG_BEGINS*/\n\
 140         .section .fini\n\
 141         mov     r14,r15\n\
 142         lds.l   @r15+,pr\n\
 143         mov.l   @r15+,r14\n\
 144         mov.l   @r15+,r12\n\
 145         rts     \n\
 146         nop\n\
 147         END_FINI\n\
 148 \n\
 149 /*@_fini_EPILOG_ENDS*/\n\
 150 \n\
 151 /*@TRAILER_BEGINS*/\n\
 152         .weak   __gmon_start__\n\
 153 ");