hal/halx86/up/pic.S

   1 /*
   2  * FILE:            hal/halx86/up/pic.S
   3  * COPYRIGHT:       See COPYING in the top level directory
   4  * PURPOSE:         HAL PIC Management and Control Code
   5  * PROGRAMMER:      Thomas Faber (thomas.faber@reactos.org)
   6  */
   7
   8 /* INCLUDES ******************************************************************/
   9
  10 #include <asm.inc>
  11
  12 #include <ks386.inc>
  13
  14 /* GLOBALS *******************************************************************/
  15
  16 .data
  17 ASSUME CS:NOTHING, DS:NOTHING, ES:NOTHING, FS:NOTHING, GS:NOTHING
  18
  19 /* FUNCTIONS *****************************************************************/
  20
  21 .code
  22
  23 MACRO(DEFINE_END_INTERRUPT_WRAPPER, WrapperName, HandlerName)
  24 EXTERN @&HandlerName&@8:PROC
  25 PUBLIC _&WrapperName&@8
  26 .PROC _&WrapperName&@8
  27     FPO 0, 2, 0, 0, 0, FRAME_FPO
  28
  29     /* Call the C function with the same arguments we got */
  30     mov ecx, [esp+4]
  31     mov edx, [esp+8]
  32     call @&HandlerName&@8
  33
  34     /* Check if we got a pointer back */
  35     test eax, eax
  36     jnz WrapperName&_CallIntHandler
  37
  38     /* No? Just return */
  39     ret 8
  40
  41 WrapperName&_CallIntHandler:
  42     /* We got a pointer to call. Since it won't return, reset the stack to
  43        the location of the stack frame. This frees up our own stack as well
  44        as that of the functions above us, and avoids an overflow due to
  45        excessive recursion.
  46        The next function takes the trap frame as its (fastcall) argument. */
  47     mov ecx, [esp+8]
  48     mov esp, ecx
  49     mov ebp, esp
  50     jmp eax
  51 .ENDP
  52 ENDM
  53
  54 MACRO(DEFINE_INTERRUPT_WRAPPER, WrapperName, HandlerName)
  55 EXTERN _&HandlerName:PROC
  56 PUBLIC _&WrapperName
  57 .PROC _&WrapperName
  58     FPO 0, 0, 0, 0, 0, FRAME_FPO
  59
  60     /* Call the C function */
  61     call _&HandlerName
  62
  63     /* Check if we got a pointer back */
  64     test eax, eax
  65     jnz WrapperName&_CallIntHandler
  66
  67     /* No? Just return */
  68     ret
  69
  70 WrapperName&_CallIntHandler:
  71     /* Optimize the tail call to avoid stack overflow */
  72     jmp eax
  73 .ENDP
  74 ENDM
  75
  76
  77 DEFINE_END_INTERRUPT_WRAPPER HalpEndSoftwareInterrupt, HalpEndSoftwareInterrupt2
  78 DEFINE_END_INTERRUPT_WRAPPER HalEndSystemInterrupt, HalEndSystemInterrupt2
  79
  80 DEFINE_INTERRUPT_WRAPPER HalpDispatchInterrupt, HalpDispatchInterrupt2
  81 DEFINE_INTERRUPT_WRAPPER HalpHardwareInterruptLevel, HalpHardwareInterruptLevel2
  82
  83 END