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Leaked source code of windows server 2003
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windows-server-2003/base/ntos/ke/amd64/dpcint.asm

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  1. title "Deferred Procedure Call Interrupt"
  2. ;++
  3. ;
  4. ; Copyright (c) 2000 Microsoft Corporation
  5. ;
  6. ; Module Name:
  7. ;
  8. ; dpcint.asm
  9. ;
  10. ; Abstract:
  11. ;
  12. ; This module implements the code necessary to process the Deferred
  13. ; Procedure Call interrupt.
  14. ;
  15. ; Author:
  16. ;
  17. ; David N. Cutler (davec) 10-Nov-2000
  18. ;
  19. ; Environment:
  20. ;
  21. ; Kernel mode only.
  22. ;
  23. ;--
  25. extern KiDispatchInterrupt:proc
  26. extern KiInitiateUserApc:proc
  27. extern __imp_HalEndSystemInterrupt:qword
  29. include ksamd64.inc
  31. subttl "Deferred Procedure Call Interrupt"
  32. ;++
  33. ;
  34. ; VOID
  35. ; KiDpcInterrupt (
  36. ; VOID
  37. ; )
  38. ;
  39. ; Routine Description:
  40. ;
  41. ; This routine is entered as the result of a software interrupt generated
  42. ; at DISPATCH_LEVEL. Its function is to save the machine state and call
  43. ; the dispatch interrupt routine.
  44. ;
  45. ; N.B. This is a directly connected interrupt that does not use an interrupt
  46. ; object.
  47. ;
  48. ; Arguments:
  49. ;
  50. ; None.
  51. ;
  52. ; Return Value:
  53. ;
  54. ; None.
  55. ;
  56. ;--
  58. NESTED_ENTRY KiDpcInterrupt, _TEXT$00
  60. .pushframe ; mark machine frame
  62. push_reg rbp ; push dummy vector
  63. push_reg rbp ; save nonvolatile register
  65. GENERATE_INTERRUPT_FRAME ; generate interrupt frame
  67. mov ecx, DISPATCH_LEVEL ; set new IRQL level
  69. ENTER_INTERRUPT ; raise IRQL, do EOI, enable interrupts
  71. call KiDispatchInterrupt ; process the dispatch interrupt
  73. EXIT_INTERRUPT <NoEOI> ; lower IRQL and restore state
  75. NESTED_END KiDpcInterrupt, _TEXT$00
  77. end