pipe.S 1.3 KB

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  1. /* Copyright (C) 1993, 1995, 1997, 2002 Free Software Foundation, Inc.
  2. This file is part of the GNU C Library.
  3. Contributed by David Mosberger (davidm@cs.arizona.edu).
  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. #include <features.h>
  16. #include <sys/syscall.h>
  17. #include <sys/regdef.h>
  18. #include <asm/pal.h>
  19. /* __pipe is a special syscall since it returns two values. */
  20. .globl pipe
  21. .align 4
  22. .ent pipe, 0
  23. pipe:
  24. .frame sp, 0, ra
  25. ldgp gp,0(pv)
  26. .prologue 1
  27. lda v0, __NR_pipe
  28. call_pal PAL_callsys
  29. bne a3, $syscall_error
  30. stl r0, 0(a0)
  31. stl r1, 4(a0)
  32. mov zero, v0
  33. ret
  34. $syscall_error:
  35. jmp zero,__syscall_error
  36. .end pipe
  37. libc_hidden_def (pipe)