info->cpu_mode = PROTECTED;
}
+ if (new_cr0->pe == 0) {
+ PrintDebug("Entering Real Mode\n");
+ info->cpu_mode = REAL;
+ }
+
+
if (new_cr0->pg == 1) {
PrintDebug("Paging is already turned on in switch to protected mode in CR0 write\n");
if (info->shdw_pg_mode == SHADOW_PAGING) {
*virt_cr0 = *(struct cr0_32 *)&(info->shdw_pg_state.guest_cr0);
+ if (info->cpu_mode==PROTECTED) {
+ virt_cr0->pg=0; // clear the pg bit because guest doesn't think it's on
+ }
} else {
*virt_cr0 = *real_cr0;
}
int ret;
char instr[15];
+ PrintDebug("Protected %s mode write to CR3 at %s 0x%x\n",
+ info->cpu_mode==PROTECTED ? "" : "Paged",
+ info->cpu_mode==PROTECTED ? "guest physical" : "guest virtual",
+ get_addr_linear(info,info->rip,&(info->segments.cs)));
// We need to read the instruction, which is at CS:IP, but that
// linear address is guest physical without PG and guest virtual with PG
- if (info->cpu_mode == PHYSICAL_MEM) {
+ if (info->mem_mode == PHYSICAL_MEM) {
// The real rip address is actually a combination of the rip + CS base
PrintDebug("Writing Guest CR3 Write (Physical Address)\n");
ret = read_guest_pa_memory(info, get_addr_linear(info, info->rip, &(info->segments.cs)), 15, instr);
ret = read_guest_va_memory(info, get_addr_linear(info, info->rip, &(info->segments.cs)), 15, instr);
}
-
if (ret != 15) {
PrintDebug("Could not read instruction (ret=%d)\n", ret);
return -1;
} else {
PrintDebug("Unknown Instruction\n");
+ SerialMemDump(instr,15);
return -1;
}
} else {
- PrintDebug("Invalid operating Mode\n");
+ PrintDebug("Invalid operating Mode (0x%x)\n", info->cpu_mode);
return -1;
}
info->rip += index;
} else {
PrintDebug("Unknown Instruction\n");
+ SerialMemDump(instr,15);
return -1;
}
} else {
- PrintDebug("Invalid operating Mode\n");
+ PrintDebug("Invalid operating Mode (0x%x)\n", info->cpu_mode);
return -1;
}