#endif
+// Set to 1 if CR3 reload with same value shall not
+// force a shadow page table flush
+// It makes windows loading MUCH faster.
+// Note that this optimization appears to fail with a 2.6 linux kernel
+#define CR3_RELOAD_OPTIMIZATION 1
+
+
ret = read_guest_va_memory(info, get_addr_linear(info, info->rip, &(info->segments.cs)), 15, instr);
}
- if (ret != 15) {
+ /* The IFetch will already have faulted in the necessary bytes for the full instruction
+ if (ret != 15) {
// I think we should inject a GPF into the guest
PrintError("Could not read instruction (ret=%d)\n", ret);
return -1;
- }
+ }
+ */
if (v3_decode(info, (addr_t)instr, &dec_instr) == -1) {
PrintError("Could not decode instruction\n");
struct cr0_32 *real_cr0 = (struct cr0_32*)&(info->ctrl_regs.cr0);
struct cr0_32 *new_cr0= (struct cr0_32 *)(dec_instr.src_operand.operand);
- PrintDebug("OperandVal = %x, length=%d\n", *new_cr0, dec_instr.dst_operand.size);
+ PrintDebug("OperandVal = %x, length=%d\n", *new_cr0, dec_instr.src_operand.size);
PrintDebug("Old CR0=%x\n", *real_cr0);
ret = read_guest_va_memory(info, get_addr_linear(info, info->rip, &(info->segments.cs)), 15, instr);
}
- if (ret != 15) {
- // I think we should inject a GPF into the guest
- PrintError("Could not read instruction (ret=%d)\n", ret);
- return -1;
- }
+ /* The IFetch will already have faulted in the necessary bytes for the full instruction
+ if (ret != 15) {
+ // I think we should inject a GPF into the guest
+ PrintError("Could not read instruction (ret=%d)\n", ret);
+ return -1;
+ }
+ */
if (v3_decode(info, (addr_t)instr, &dec_instr) == -1) {
PrintError("Could not decode instruction\n");
ret = read_guest_va_memory(info, get_addr_linear(info, info->rip, &(info->segments.cs)), 15, instr);
}
- if (ret != 15) {
- // I think we should inject a GPF into the guest
- PrintError("Could not read instruction (ret=%d)\n", ret);
- return -1;
- }
+ /* The IFetch will already have faulted in the necessary bytes for the full instruction
+ if (ret != 15) {
+ // I think we should inject a GPF into the guest
+ PrintError("Could not read instruction (ret=%d)\n", ret);
+ return -1;
+ }
+ */
if (v3_decode(info, (addr_t)instr, &dec_instr) == -1) {
PrintError("Could not decode instruction\n");
PrintDebug("Old Shadow CR3=%x; Old Guest CR3=%x\n",
*(uint_t*)shadow_cr3, *(uint_t*)guest_cr3);
- if (1 || !CR3_32_SAME_BASE(new_cr3, guest_cr3)) {
+ if (!CR3_RELOAD_OPTIMIZATION || !CR3_32_SAME_BASE(new_cr3, guest_cr3)) {
addr_t shadow_pt;
delete_page_tables_pde32((pde32_t *)CR3_TO_PDE32(*(uint_t*)shadow_cr3));
- shadow_pt = create_new_shadow_pt32(info);
+ shadow_pt = create_new_shadow_pt32();
shadow_cr3->pdt_base_addr = PD32_BASE_ADDR(shadow_pt);
}
ret = read_guest_va_memory(info, get_addr_linear(info, info->rip, &(info->segments.cs)), 15, instr);
}
- if (ret != 15) {
- // I think we should inject a GPF into the guest
- PrintError("Could not read instruction (ret=%d)\n", ret);
- return -1;
- }
+ /* The IFetch will already have faulted in the necessary bytes for the full instruction
+ if (ret != 15) {
+ // I think we should inject a GPF into the guest
+ PrintError("Could not read instruction (ret=%d)\n", ret);
+ return -1;
+ }
+ */
if (v3_decode(info, (addr_t)instr, &dec_instr) == -1) {
PrintError("Could not decode instruction\n");