lib/libcaps/i386/upcall.S

   1         /*
   2          * $DragonFly: src/lib/libcaps/i386/upcall.S,v 1.2 2003/12/07 04:21:54 dillon Exp $
   3          */
   4
   5 #include "asmacros.h"
   6 #include "asdefs.h"
   7
   8         .text
   9         .globl  upc_callused_wrapper
  10
  11         /*
  12          * On entry:    %eax contains function
  13          *              %ecx contains data
  14          *              Stack: [eax,ecx,eflags,oldip]
  15          */
  16 NON_GPROF_ENTRY(upc_callused_wrapper)
  17         pushl   %edx            /* save %edx (upcall pointer) */
  18         pushl   %ecx            /* func(data) */
  19         call    *%eax
  20         addl    $4,%esp
  21         popl    %edx            /* upcall pointer */
  22         movl    UPC_UTHREAD(%edx),%eax
  23         incl    UPC_PENDING(%edx)    /* set pending bit (prevents upcalls) */
  24         subl    $TDPRI_CRIT,TD_PRI(%eax) /* cleanup critical section count */
  25         pushl   %esp            /* sp pointing to os supplied frame */
  26         pushl   $-1             /* upcid */
  27         pushl   $2              /* FETCH next */
  28         call    upc_control
  29         popl    %eax
  30         popl    %ecx
  31         popl    %edx
  32         popfl
  33         ret
  34