void
random_trap (int trap, int errcode)
{
tfp tf;
printf ("just got TRAP %d in env 0x%x on CPU %d", trap,
curenv ? curenv->env_id : -1, cpu_id);
if (trap >= 8 && trap < 32) {
printf ("; error code = 0x%x\n", errcode);
tfp_set (tf, errcode, tf_edx);
}
else {
printf ("\n");
tfp_set (tf, trap, tf_edx);
}
printf (" eip = 0x%x;", tf->tf_eip);
printf (" cs = 0x%x;", tf->tf_cs & 0xffff);
printf (" eflags = 0x%x\n", tf->tf_eflags);
printf (" esp = 0x%x;", tf->tf_esp);
printf (" ebp = 0x%x;", tf->tf_ebp);
printf (" ss = 0x%x;", tf->tf_ss & 0xffff);
printf (" ds = 0x%x;", tf->tf_ds & 0xffff);
printf (" es = 0x%x\n", tf->tf_es & 0xffff);
if (tf->tf_cs == GD_KT && trap == 13) {
tfp t = &curenv->env_tf;
struct seg_desc *dp;
printf ("TF: eip = 0x%x, esp = 0x%x, cs = 0x%x, ss = 0x%x\n",
t->tf_eip, t->tf_esp, t->tf_cs, t->tf_ss);
dp = &gdt[t->tf_cs >> 3];
printf ("CS: type: 0x%x, base: 0x%x, lim: 0x%x\n",
dp->sd_type, ((dp->sd_base_31_24 << 24)
| (dp->sd_base_23_16 << 16) | dp->sd_base_15_0),
(dp->sd_lim_19_16 << 16) | dp->sd_lim_15_0);
dp = &gdt[t->tf_ss >> 3];
printf ("SS: type: 0x%x, base: 0x%x, lim: 0x%x\n",
dp->sd_type, ((dp->sd_base_31_24 << 24)
| (dp->sd_base_23_16 << 16) | dp->sd_base_15_0),
(dp->sd_lim_19_16 << 16) | dp->sd_lim_15_0);
}
__XOK_SYNC(UAREA only modified when localized)
{
int stat;
irq_eoi (8);
/* MUST read to acknowledge the interrupt */
stat = mc146818_read(NULL, MC_REGC);
if (stat & MC_REGC_PF)
{
if ((!UAREA.u_pendrtc) && UAREA.u_entrtc)
{
tfp tf;
u_int *esp;
u_int tt_eip;
u_int old_pfm = page_fault_mode;
tfp_set (tf, trapno, tf_edi);
tt_eip = tf->tf_eip; /* trap time eip */
/* copy interrupt stack frame on to user stack */
page_fault_mode = PFM_PROP;
tf->tf_esp -= 12;
esp = trup ((u_int *)tf->tf_esp);
esp[2] = tf->tf_eflags;
esp[1] = tf->tf_cs;
esp[0] = tf->tf_eip;
page_fault_mode = old_pfm;
tf->tf_eip = UAREA.u_entrtc;
UAREA.u_pendrtc = 1;
env_upcall();
}
}
}
