mmap.S 1.4 KB

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  1. /* Copyright (C) 1995,96,97,98,99,2000,2002,2005 Free Software Foundation, Inc.
  2. This file is part of the GNU C Library.
  3. The GNU C Library is free software; you can redistribute it and/or
  4. modify it under the terms of the GNU Lesser General Public
  5. License as published by the Free Software Foundation; either
  6. version 2.1 of the License, or (at your option) any later version.
  7. The GNU C Library is distributed in the hope that it will be useful,
  8. but WITHOUT ANY WARRANTY; without even the implied warranty of
  9. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  10. Lesser General Public License for more details.
  11. You should have received a copy of the GNU Lesser General Public
  12. License along with the GNU C Library; if not, write to the Free
  13. Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  14. 02111-1307 USA. */
  15. #define _ERRNO_H 1
  16. #include <features.h>
  17. #include <bits/errno.h>
  18. #include <sys/syscall.h>
  19. .text
  20. .global mmap
  21. .type mmap,%function
  22. mmap:
  23. /* Save registers. */
  24. movl %ebx, %edx
  25. movl $__NR_mmap, %eax /* System call number in %eax. */
  26. lea 4(%esp), %ebx /* Address of args is 1st arg. */
  27. /* Do the system call trap. */
  28. int $0x80
  29. /* Restore registers. */
  30. movl %edx, %ebx
  31. /* If 0 > %eax > -4096 there was an error. */
  32. cmpl $-4096, %eax
  33. ja __syscall_error
  34. /* Successful; return the syscall's value. */
  35. ret
  36. .size mmap,.-mmap