usr.bin/doscmd/cpu.c

   1 /*
   2 ** No copyright ?!
   3 **
   4 ** $FreeBSD$
   5 */
   6 #include "doscmd.h"
   7
   8 /*
   9 ** Hardware /0 interrupt
  10 */
  11 void
  12 int00(regcontext_t *REGS)
  13 {
  14     debug(D_ALWAYS, "Divide by 0 in DOS program!\n");
  15     exit(1);
  16 }
  17
  18 void
  19 int01(regcontext_t *REGS)
  20 {
  21     debug(D_ALWAYS, "INT 1 with no handler! (single-step/debug)\n");
  22 }
  23
  24 void
  25 int03(regcontext_t *REGS)
  26 {
  27     debug(D_ALWAYS, "INT 3 with no handler! (breakpoint)\n");
  28 }
  29
  30 void
  31 int0d(regcontext_t *REGS)
  32 {
  33     debug(D_ALWAYS, "IRQ5 with no handler!\n");
  34 }
  35
  36 void
  37 cpu_init(void)
  38 {
  39     u_long vec;
  40
  41     vec = insert_hardint_trampoline();
  42     ivec[0x00] = vec;
  43     register_callback(vec, int00, "int 00");
  44
  45     vec = insert_softint_trampoline();
  46     ivec[0x01] = vec;
  47     register_callback(vec, int01, "int 01");
  48
  49     vec = insert_softint_trampoline();
  50     ivec[0x03] = vec;
  51     register_callback(vec, int03, "int 03");
  52
  53     vec = insert_hardint_trampoline();
  54     ivec[0x0d] = vec;
  55     register_callback(vec, int0d, "int 0d");
  56
  57     vec = insert_null_trampoline();
  58     ivec[0x34] = vec;   /* floating point emulator */
  59     ivec[0x35] = vec;   /* floating point emulator */
  60     ivec[0x36] = vec;   /* floating point emulator */
  61     ivec[0x37] = vec;   /* floating point emulator */
  62     ivec[0x38] = vec;   /* floating point emulator */
  63     ivec[0x39] = vec;   /* floating point emulator */
  64     ivec[0x3a] = vec;   /* floating point emulator */
  65     ivec[0x3b] = vec;   /* floating point emulator */
  66     ivec[0x3c] = vec;   /* floating point emulator */
  67     ivec[0x3d] = vec;   /* floating point emulator */
  68     ivec[0x3e] = vec;   /* floating point emulator */
  69     ivec[0x3f] = vec;   /* floating point emulator */
  70 }