vfork.S 1.8 KB

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  1. /* Copyright (C) 2003 Free Software Foundation, Inc.
  2. This file is part of the GNU C Library.
  3. Contributed by Jakub Jelinek <jakub@redhat.com>, 2003.
  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, write to the Free
  14. Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  15. 02111-1307 USA. */
  16. #include <sysdep-cancel.h>
  17. .text
  18. #ifdef SHARED
  19. .LLGETPC0:
  20. retl
  21. add %o7, %o0, %o0
  22. #endif
  23. ENTRY(__vfork)
  24. #ifdef SHARED
  25. mov %o7, %o1
  26. sethi %hi(_GLOBAL_OFFSET_TABLE_-4), %o0
  27. call .LLGETPC0
  28. add %o0, %lo(_GLOBAL_OFFSET_TABLE_+4), %o0
  29. sethi %hi(__libc_pthread_functions), %o2
  30. mov %o1, %o7
  31. or %o2, %lo(__libc_pthread_functions), %o2
  32. ld [%o0 + %o2], %o2
  33. ld [%o2], %o2
  34. cmp %o2, 0
  35. #else
  36. .weak pthread_create
  37. sethi %hi(pthread_create), %o0
  38. orcc %o0, %lo(pthread_create), %o0
  39. #endif
  40. #if defined SHARED && !defined BROKEN_SPARC_WDISP22
  41. bne HIDDEN_JUMPTARGET(__fork)
  42. #else
  43. bne 1f
  44. #endif
  45. mov __NR_vfork, %g1
  46. ta 0x10
  47. bcs __syscall_error_handler
  48. nop
  49. sub %o1, 1, %o1
  50. retl
  51. and %o0, %o1, %o0
  52. #if !defined SHARED || defined BROKEN_SPARC_WDISP22
  53. 1: mov %o7, %g1
  54. call HIDDEN_JUMPTARGET(__fork)
  55. mov %g1, %o7
  56. #endif
  57. SYSCALL_ERROR_HANDLER
  58. PSEUDO_END (__vfork)
  59. libc_hidden_def (__vfork)
  60. weak_alias (__vfork, vfork)