fork.S 1.4 KB

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  1. /* Copyright (C) 1997, 1999 Free Software Foundation, Inc.
  2. This file is part of the GNU C Library.
  3. Contributed by Miguel de Icaza <miguel@gnu.ai.mit.edu>, 1997.
  4. The GNU C Library is free software; you can redistribute it and/or
  5. modify it under the terms of the GNU Lesser General Public
  6. License as published by the Free Software Foundation; either
  7. version 2.1 of the License, or (at your option) any later version.
  8. The GNU C Library is distributed in the hope that it will be useful,
  9. but WITHOUT ANY WARRANTY; without even the implied warranty of
  10. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  11. Lesser General Public License for more details.
  12. You should have received a copy of the GNU Lesser General Public
  13. License along with the GNU C Library; if not, see
  14. <http://www.gnu.org/licenses/>. */
  15. /* Code taken from glibc2.2.2/sysdeps/unix/sysv/linux/sparc/vfork.S */
  16. #include <features.h>
  17. #include <sys/syscall.h>
  18. .text
  19. .global fork
  20. #ifdef __UCLIBC_HAS_THREADS__
  21. .weak fork
  22. #endif
  23. .type fork,%function
  24. .align 4
  25. fork:
  26. mov __NR_fork, %g1
  27. ta 0x10
  28. bcc,a 9000f
  29. nop
  30. save %sp,-96,%sp
  31. call HIDDEN_JUMPTARGET(__errno_location)
  32. nop
  33. st %i0,[%o0]
  34. jmpl %i7+8,%g0
  35. restore %g0,-1,%o0
  36. 9000:
  37. sub %o1, 1, %o1
  38. retl
  39. and %o0, %o1, %o0
  40. .size fork,.-fork
  41. #ifdef __UCLIBC_HAS_THREADS__
  42. strong_alias(fork,__libc_fork)
  43. #endif
  44. libc_hidden_def(fork)