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  1. /*
  2.  * Copyright (c) 2008 Jiri Svoboda
  3.  * All rights reserved.
  4.  *
  5.  * Redistribution and use in source and binary forms, with or without
  6.  * modification, are permitted provided that the following conditions
  7.  * are met:
  8.  *
  9.  * - Redistributions of source code must retain the above copyright
  10.  *   notice, this list of conditions and the following disclaimer.
  11.  * - Redistributions in binary form must reproduce the above copyright
  12.  *   notice, this list of conditions and the following disclaimer in the
  13.  *   documentation and/or other materials provided with the distribution.
  14.  * - The name of the author may not be used to endorse or promote products
  15.  *   derived from this software without specific prior written permission.
  16.  *
  17.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27.  */
  28.  
  29. /** @addtogroup rtld rtld
  30.  * @brief
  31.  * @{
  32.  */
  33. /**
  34.  * @file
  35.  */
  36.  
  37. #include <stdio.h>
  38.  
  39. static void kputint(unsigned i)
  40. {
  41.     unsigned dummy;
  42.     asm volatile (
  43.         "movl $30, %%eax;"
  44.         "int $0x30"
  45.         : "=d" (dummy) /* output - %edx clobbered */
  46.         : "d" (i) /* input */
  47.         : "%eax","%ecx" /* all scratch registers clobbered */
  48.     );
  49. }
  50.  
  51. int z = 42;
  52.  
  53. void test_func(void);
  54. void test_func(void)
  55. {
  56.     kputint(-1);
  57.     kputint(z);
  58.     printf("Hello, world! (from rtld)\n");
  59.     getchar();
  60.     printf("x\n");
  61.     while(1);
  62.    
  63.     asm (
  64.         "movl $253, %%eax;"
  65.         "int $0x30"
  66.         : /* output */
  67.         : /* input */
  68.         : "%eax","%ecx","%edx" /* all scratch registers clobbered */
  69.     );
  70. }
  71.  
  72.  
  73. void _rtld_main(void)
  74. {
  75.     kputint(-1);
  76.  
  77.     kputint(32);
  78.  
  79.     test_func();
  80.  
  81.     kputint(46);
  82. }
  83.  
  84. /** @}
  85.  */
  86.