root/trapasm.S

/*   */

   1 #include "mmu.h"
   2 
   3   # vectors.S sends all traps here.
   4 .globl alltraps
   5 alltraps:
   6   # Build trap frame.
   7   pushl %ds
   8   pushl %es
   9   pushl %fs
  10   pushl %gs
  11   pushal
  12   
  13   # Set up data segments.
  14   movw $(SEG_KDATA<<3), %ax
  15   movw %ax, %ds
  16   movw %ax, %es
  17 
  18   # Call trap(tf), where tf=%esp
  19   pushl %esp
  20   call trap
  21   addl $4, %esp
  22 
  23   # Return falls through to trapret...
  24 .globl trapret
  25 trapret:
  26   popal
  27   popl %gs
  28   popl %fs
  29   popl %es
  30   popl %ds
  31   addl $0x8, %esp  # trapno and errcode
  32   iret

/*   */